Marked—Up Specification
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`CHARACTER STRING EXTRACTION METHOD AND
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`CHARACTER STRING EXTRACTION DEVICE
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`TECHNICAL FIELD
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`The present
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`invention relates to a character string extraction method and a
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`character string extraction device that read pieces of individual information displayed on
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`electric appliances such as household electrical appliances,
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`in-vehicle products for
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`10
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`automobiles, and business equipment. The individual
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`information mainly includes a
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`product number, a model number, or the like of a product.
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`BACKGROUND ART
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`In recent years, various regulations against global warming are gradually
`
`established. As a result of technical innovations made to cope with the regulations, there
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`15
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`are household electrical appliances, especially, refrigerators, using a variety of materials
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`for the same parts in society as a whole.
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`More specifically, as refrigerant of a refrigerator, chlorofluorocarbon and a
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`combustible refrigerant are employed. As chlorofluorocarbons, R12, R22, R134a, and
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`R502 are used. As a combustible refrigerant, isobutane is used. As foaming gases for a
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`20
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`thermal
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`insulating material of a refrigerator, chlorofluorocarbon (R11 and R141b) and
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`cyclopentane are used. Alternatively, as another thermal
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`insulating material of a
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`refrigerator, a vacuum thermal
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`insulating material
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`is used. As the vacuum thermal
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`insulating material, urethane foam and glass fiber are used.
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`The vacuum thermal
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`insulating material is formed by vacuum-packing these materials. Some vacuum thermal
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`25
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`insulating material is attached with a getter material to maintain the insulation efficiency.
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`Various agreements are made to disassemble and process refrigerators using a
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`multiple of materials. More specifically,
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`in terms of prevention against global warming,
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`chlorofluorocarbons are required to be collected in units of types.
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`In terms of the securing
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`1
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`

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`Marked-Up Specification
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`of safety in a dismantling operation, after the dismantling operation is performed while
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`diluting isobutane and cyclopentane, resultant gases are released to the atmosphere.
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`In order to satisfy the various demands , at a site where refrigerators are
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`disassembled,
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`refrigerators
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`to
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`be
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`discarded
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`are
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`grouped
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`by
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`the
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`types
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`of
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`chlorofluorocarbons and the types of thermal
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`insulating materials used therein.
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`A
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`predetermined number of grouped refrigerators are accumulated and then subjected to a
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`dismantling operation.
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`An outline of the dismantling operation will be described with reference to FIG. 47.
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`Discarded refrigerators in market 1 are collected into recycle factory 1002. The
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`collected refrigerators are sorted by the types of chlorofluorocarbons, thermal insulating
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`materials, and the like used therein (3). Until the number of refrigerators using members
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`of the same type reaches a predetermined number, the sorted refrigerators are stored
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`(predetermined number accumulation waiting 4).
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`When a predetermined number of refrigerators using members of the same type
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`are accumulated, the refrigerators are moved to a dismantling line for refrigerator. The
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`refrigerators moved to the dismantling line are dismantled by a processing method adapted
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`to the members. The method for dismantling as described above is called lot process 5.
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`For example, Patent Literature 1 describes one example of a lot process focusing
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`attention on a thermal insulating material.
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`In a conventional method for dismantling refrigerators, a dismantling operation for
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`refrigerators is not performed until a predetermined number of
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`refrigerators are
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`accumulated for each lot. Refrigerators waiting for an operation are stored as stocks.
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`Each lot means a group of refrigerators using the same specific material.
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`In a refrigerator,
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`the material mainly intends to a combination of a refrigerant and a thermal insulating
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`25
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`material. Another conditions may be added.
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`In recent years,
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`large—size refrigerators tend to be preferred. Refrigerators
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`waiting for an operation are stored by using a vast space.
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`

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`Marked—Up Specification
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`In particular, as the result of summative development of each element technology
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`centered on a refrigerant, rates of accumulation in the lots are different from each other.
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`More specifically, refrigerators using materials that are mainly collected from the market or
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`refrigerators
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`employing
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`newly applied materials
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`are
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`slowly accumulated.
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`The
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`refrigerators that are slowly accumulated are considerably deteriorated in processing
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`freshness of a dismantling operation. The processing freshness of dismantling operation
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`means a period from a time when a refrigerator is collected in a recycle factory to a time
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`when a dismantling operation for the refrigerator is started. More specifically,
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`the
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`refrigerators that are slowly accumulated are collected in the recycle factory consequently
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`10
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`wait for a long period until the dismantling operation is started.
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`Citation List
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`Patent Literature
`
`PLT 1: Unexamined Japanese Patent Publication No. 2004-66628
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`15
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`SUMMARY OF THE INVENTION
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`The present invention solves the above problems by using devices and methods
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`described in embodiments (which will be described later).
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`A refrigerator dismantling device according to the present invention includes a
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`storage unit, an individual information reading unit, a processing information fetching unit,
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`a processing information display unit, a first determination unit, a first control unit, a
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`second determination unit, a second control unit, a third determination unit, and a third
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`control unit.
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`In the storage unit, processing information to dismantle a refrigerator is stored in
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`advance. The individual information reading unit reads individual information from the
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`refrigerator. The individual information mainly means a product number, a model number,
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`or the like (to be referred to as a "product number" hereinafter) of a product. The
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`processing information fetching unit
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`fetches processing information from the read
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`

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`Marked-Up Specification
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`individual
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`information. The processing information display unit displays the fetched
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`processing information on the refrigerator.
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`The first determination unit, based on the displayed processing information,
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`determines whether the refrigerator is shifted to a preliminary processing step or a
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`refrigerant collecting step. The first control unit, based on the determination result
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`obtained by the first determination unit, operates such that the first control unit directly
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`shifts the refrigerator to a refrigerant collecting step or shifts the refrigerator to a
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`preliminary processing step to perform preliminary processing based on the processing
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`information to the refrigerator and then shifts the refrigerator to the refrigerant collecting
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`10
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`step.
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`The second determination unit,
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`in the refrigerant collecting step, determines a
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`refrigerant to be collected from the refrigerator based on the processing information. The
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`second control unit operates according to the determination result of
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`the second
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`determination unit to shift the refrigerator to a step of collecting a refrigerant from a
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`refrigerator.
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`The third determination unit, after the refrigerant is collected from the refrigerator,
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`determines whether the refrigerator is shifted to a crushing step or a standby step based on
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`the processing information. The third control unit, based on the determination result
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`obtained by the third determination result, operates such that the third control unit directly
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`shifts the refrigerator to the crushing step to crush the refrigerator or shifts the refrigerator
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`to the standby step and, after the number of refrigerators being standby in the standby
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`step reaches a predetermined number, shifts the refrigerator to the crushing step to crush
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`the refrigerator.
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`The processing information is information that expresses at least the type of a
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`thermal
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`insulating material and the type of a refrigerant used in a refrigerator. The
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`processing information display unit operates to display, as the processing information, the
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`types of refrigerant in different colors. The processing information display unit operates to
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`Marked—Up Specification
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`display, as the processing information, the types of refrigerant in different symbols or
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`graphics.
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`The preliminary processing step is a processing step of forming a hole in a housing
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`configuring a refrigerator.
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`In the refrigerant collecting step, a jig for collecting a refrigerant and the type of
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`the refrigerant are indicated in the same color.
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`In the dismantling device described above, without performing a lot process that
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`requires line switching and a storage area, discarded refrigerators are dismantled in
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`incoming order.
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`10
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`A method for dismantling refrigerators according to the present
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`invention is
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`performed along the operations of the dismantling device.
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`Furthermore, a character string extraction device used in the refrigerator
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`dismantling device or the method for dismantling refrigerators according to the present
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`invention extracts a pre—registered candidate character string from image information from
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`15
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`which individual information is read.
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`The character string extraction device according to the present invention includes
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`a replacement information registering unit, a candidate character data registering unit, an
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`image information converting unit, a character information replacing unit, a search
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`character generating unit, a first comparing unit, and a candidate character string output
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`20
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`unit.
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`In the replacement
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`information registering unit,
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`replacement
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`information to
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`replace a specific character with a designated character with respect
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`to character
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`information to be expected to be erroneously recognized is registered in advance.
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`In the
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`candidate character data registering unit, candidate character data supposed when the
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`25
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`designated character is used is registered in advance with respect to a candidate character
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`string. The image information converting unit converts read image information into
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`character information.
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`

`

`Marked-Up Specification
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`When the character information includes a specific character,
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`the character
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`information replacing unit replaces the specific character with a designated character.
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`When the character information does not include the specific character, the character
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`information replacing unit generates read character data by using the converted character
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`information.
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`The search character generating unit replaces a predetermined character of the
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`read character data with a special character. When special characters are continued, the
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`search character generating unit further replaces a continued special character group with
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`a special character. Search character data is generated from the read character data.
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`10
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`The first comparing unit compares the search character data with the candidate character
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`data.
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`When candidate character data coinciding with the search character data is
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`present as a result of the comparison between the search character data and candidate
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`character data in the first comparing unit, the candidate character string output unit
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`15
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`extracts a candidate character string corresponding to the candidate character data.
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`Furthermore,
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`the character string extraction device according to the present
`
`invention includes a special-character-added search character generating unit and a
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`second comparing unit.
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`When candidate character data coinciding with the search lcharacter data is not
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`2O
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`present as a result of the comparison between the search character data and candidate
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`character data in the first comparing unit, the special—character-added search character
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`generating unit adds special characters to the front and rear ends of the search character
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`data to generate special—character-added search character data. When special characters
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`are continued, the special—character-added search character generating unit replaces a
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`25
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`continued special character group with a special character to define the resultant special
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`character as special-character-added search character data.
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`The second comparing unit compares
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`the special-character—added search
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`character data with the candidate character data.
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`6
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`

`

`Marked-Up Specification
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`When candidate character data coinciding with the special—character-added search
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`character data
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`is
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`not present
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`as
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`a
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`result
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`of
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`the
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`comparison
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`between the
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`special-character—added search character data and candidate character data in the second
`
`comparing unit, characters adjacent to the added special character before and behind the
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`special character are deleted from the special-character—added search character data to
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`obtain new search character data. Arithmetic operations subsequent to the operation of
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`the special-character—added search character generating unit are repeated.
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`When the new search character data includes less than two characters as a result
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`of deleting characters adjacent to the added special character before and behind the special
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`10
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`character from the special—character—added search character data, the second comparing
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`unit causes searching to be impossible.
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`Furthermore,
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`the character string extraction device according to the present
`
`invention includes: a front-side return search character generating unit; a third comparing
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`unit; a front-side return character deleting unit; a rear-side return search character
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`15
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`generating unit; and a fourth comparing unit.
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`When candidate character data coinciding with the special-character-added search
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`character
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`data
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`is
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`present
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`as
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`a
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`result
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`of
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`the
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`comparison
`
`between
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`the
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`special-character-added search character data and candidate character data in the second
`
`comparing unit, furthermore, the front-side return search character generating unit returns
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`20
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`the front-side one character of the front-side one and rear-side one characters adjacent to
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`the special character most
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`recently deleted in the special-character—added search
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`character data to generate front-side return search character data.
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`The third comparing unit compares the front-side return search character data
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`with the candidate character data.
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`25
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`When candidate character data coinciding with the front—side return search
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`character data is present as a result of the comparison between the front—side return search
`
`character data and candidate character data in the third comparing unit, the front-side
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`return character deleting unit defines the front-side return search character data as new
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`7
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`

`

`Marked—Up Specification
`
`special-character-added search character data. Further arithmetic operations subsequent
`
`to the operation of the front—side return search character generating unit are repeated.
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`When candidate character data coinciding with the front-side return search character data
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`is not present as a result of the comparison between the front-side return search character
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`data and candidate character data in the third comparing unit,
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`the front-side return
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`character deleting unit deletes the front-side one character from the front-side return
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`search character data to generate special-character-added search character data.
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`The rear—side return search character generating unit returns the rear-side one
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`character of the front and rear characters adjacent to the special character most recently
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`10
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`deleted in special-character-added search character data to generate rear-side return
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`search character data.
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`The fourth comparing unit compares the rear—side return search character data
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`with the candidate character data.
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`When candidate character data coinciding with the rear-side return search
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`15
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`character data is present as a result of the comparison between the rear-side search
`
`character data and candidate character data in the fourth comparing unit, the candidate
`
`character string output unit defines the rear-side return search character data as new
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`special-character-added search character data. Further arithmetic operations subsequent
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`to the operation of the rear-side return search character generating unit are repeated.
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`20
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`When candidate character data coinciding with the rear—side return search character data is
`
`not present as a result of the comparison between the rear-side search character data and
`
`candidate character data in the fourth comparing unit, the candidate character string
`
`output unit deletes the rear—side one character most recently returned from the rear—side
`
`return search character data to extract a candidate character string corresponding to the
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`25
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`candidate character data.
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`The individual information is individual information held by a discarded household
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`electrical appliance.
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`In particular,
`
`the discarded household electrical appliance is a
`
`refrigerator.
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`

`

`Marked-Up Specification
`
`In the character string extraction device, when candidate character data falling
`
`within a range supposed in advance is registered, product numbers of a wide variety of
`
`refrigerators can be read with high accuracy.
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`A character string extraction method according to the present
`
`invention is
`
`executed in accordance with the operations of the character string extraction device.
`
`The household electrical appliance dismantling device according to the present
`
`invention includes: a storage unit; an individual
`
`information read unit; a processing
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`information fetching unit; a processing information display unit; a fourth determination.
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`unit; a fourth control unit; a fifth determination unit; and a fifth control unit.
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`10
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`The storage unit stores processing information to disassemble a household
`
`electrical appliance. The individual information reading unit reads individual information
`
`from the household electrical appliance. The processing information fetching unit fetches
`
`processing information from the read individual information. The processing information
`
`display unit displays the extracted processing information on the household electrical
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`15
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`appliance.
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`The fourth determination unit, based on the displayed processing information,
`
`determines whether the household electrical appliance is shifted to a preliminary
`
`processing step or a dismantling process.
`
`The fourth control unit, based on the
`
`determination result obtained by the fourth determination unit, operates such that the
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`20
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`fourth control unit directly shifts the household electrical appliance to the dismantling step
`
`or shifts the household electrical appliance to the preliminary processing step to perform
`
`preliminary processing based on the processing information to the household electrical
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`appliance and then shifts the household electrical appliance to the dismantling step.
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`The fifth determination unit,
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`in the dismantling step, based on the processing
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`25
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`information, determines one disassembling step of predetermined disassembling steps to
`
`which the household electrical appliance should be shifted. The fifth control unit operates
`
`to shift the household electrical appliance to the determined disassembling step according
`
`to a determination result obtained by the fifth determination unit.
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`9
`
`

`

`Marked—Up Specification
`
`In the dismantling device described above, without performing a lot process that
`
`requires line switching and a storage area, discarded household electrical appliances are
`
`disassembled in incoming order.
`
`A method for dismantling household electrical
`
`appliances according to the
`
`present invention is performed in accordance with the operations of the dismantling device.
`
`BRIEF DESCRIPTION OF DRAWINGS
`
`FIG. 1 is a schematic flow chart of a method for dismantling refrigerators according
`
`to a first embodiment of the present invention.
`
`FIG. 2 is a main flow chart of the method for dismantling refrigerators according to
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`10
`
`the first embodiment of the present invention.
`
`FIG. 3 is an explanatory diagram in which individual information ofa refrigerator is
`
`read by using the refrigerator dismantling device according to the first embodiment of the
`
`present invention.
`
`FIG. 4 is an explanatory diagram in which individual
`
`information of another
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`15
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`refrigerator is read in the first embodiment of the present invention.
`
`FIG. 5 is a plan view of a processing information display unit according to the first
`
`embodiment of the present invention.
`
`FIG. 6 is a plan view of another processing information display unit according to
`
`the first embodiment of the present invention.
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`20
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`FIG. 7 is an explanatory diagram of still another processing information display
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`unit according to the first embodiment of the present invention.
`
`FIG. 8 is an explanatory diagram for explaining a step of collecting a refrigerant
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`from a refrigerator in the first embodiment of the present invention.
`
`FIG. 9 is an explanatory diagram for explaining a step of collecting a refrigerant
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`25
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`from another refrigerator in the first embodiment of the present invention.
`
`FIG. 10 is an explanatory diagram for explaining a step of collecting a refrigerant
`
`from a compressor in the first embodiment of the present invention.
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`10
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`

`

`Marked-Up Specification
`
`FIG. 11 is an explanatory diagram for explaining a standby step for a refrigerator
`
`in the first embodiment of the present invention.
`
`FIG. 12 is an explanatory diagram for explaining a standby step for a refrigerator
`
`in the first embodiment of the present invention.
`
`FIG. 13 is an explanatory diagram for explaining a standby step for a refrigerator
`
`in the first embodiment of the present invention.
`
`FIG. 14 is an explanatory diagram for explaining a standby step for a refrigerator
`
`in the first embodiment of the present invention.
`
`FIG. 15 is an explanatory diagram for explaining a standby step for a refrigerator
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`10
`
`in the first embodiment of the present invention.
`
`FIG. 16 is a block diagram of a character string extraction device for refrigerator
`
`according to a second embodiment of the present invention.
`
`FIG. 17 is a hardware block diagram of the character string extraction device for
`
`refrigerator according to the second embodiment of the present invention.
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`15
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`FIG. 18 is an explanatory diagram for explaining replacement information in the
`
`character string extraction method for refrigerator according to the second embodiment of
`
`the present invention.
`
`FIG. 19 is an explanatory diagram for explaining other replacement information in
`
`the character
`
`string extraction method for
`
`refrigerator according to the second
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`20
`
`embodiment of the present invention.
`
`FIG. 20 is an explanatory diagram for explaining still other
`
`replacement
`
`information in the character string extraction method for refrigerator according to the
`
`second embodiment of the present invention.
`
`FIG. 21 is an explanatory diagram for explaining candidate character data in the
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`25
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`character string extraction method for refrigerator according to the second embodiment of
`
`the present invention.
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`11
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`

`

`Marked-Up Specification
`
`FIG. 22 is a conceptual diagram showing a candidate character string in the
`
`character string extraction method for refrigerator according to the second embodiment of
`
`the present invention.
`
`FIG. 23 is an explanatory diagram for explaining an extracting process in the
`
`character string extraction method for refrigerator according to the second embodiment of
`
`the present invention.
`
`FIG. 24A is a block diagram of a character string extraction device for refrigerator
`
`according to the second embodiment of the present invention.
`
`FIG. 24B is a block diagram of a character string extraction device for refrigerator
`
`10
`
`according to the second embodiment of the present invention.
`
`FIG. 25A is an explanatory diagram for explaining an extracting process in the
`
`character string extraction method for refrigerator according to the second embodiment of
`
`the present invention.
`
`FIG. 25B is an explanatory diagram for explaining an extracting process in the
`
`15
`
`character string extraction method for refrigerator according to the second embodiment of
`
`the present invention.
`
`FIG. 26A is a flow chart of the character string extraction method for refrigerator
`
`according to the second embodiment of the present invention.
`
`FIG. 26B is a flow chart of the character string extraction method according to the
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`20
`
`second embodiment of the present invention.
`
`FIG. 27 is an explanatory diagram of a jig that collects a refrigerant in a third
`
`embodiment of the present invention.
`
`FIG. 28 is an explanatory diagram of the jig that collects a refrigerant in the third
`
`embodiment of the present invention.
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`25
`
`FIG. 29 is an explanatory diagram of an adjusting unit in the third embodiment of
`
`the present invention.
`
`FIG. 30 is an explanatory diagram of another adjusting unit
`
`in the third
`
`embodiment of the present invention.
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`12
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`

`

`Marked—Up Specification
`
`FIG. 31 is an explanatory diagram of a jig that collects another refrigerant in the
`
`third embodiment of the present invention.
`
`FIG. 32 is an explanatory diagram of a jig that collects still another refrigerant in
`
`the third embodiment of the present invention.
`
`FIG. 33 is an explanatory diagram of a jig that collects still another refrigerant in
`
`the third embodiment of the present invention.
`
`FIG. 34 is an explanatory diagram of a jig that collects still another refrigerant in
`
`the third embodiment of the present invention.
`
`FIG. 35 is an explanatory diagram of a jig that collects a different refrigerant in the
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`10
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`third embodiment of the present invention.
`
`FIG. 36 is an explanatory diagram of a jig that collects a different refrigerant in the
`
`third embodiment of the present invention.
`
`FIG. 37 is an explanatory diagram ofa jig that collects a still different refrigerant in
`
`the third embodiment of the present invention.
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`15
`
`FIG. 38 is an explanatory diagram ofa jig that collects a still different refrigerant in
`
`the third embodiment of the present invention.
`
`FIG. 39 is an explanatory diagram of a jig that collects another refrigerant in the
`
`third embodiment of the present invention.
`
`FIG. 40 is an explanatory diagram of a jig that collects another refrigerant in the
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`20
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`third embodiment of the present invention.
`
`FIG. 41 is an explanatory diagram of a jig that collects a refrigerant using a guide
`
`unit in the third embodiment of the present invention.
`
`FIG. 42 is an explanatory diagram of the jig that collects the refrigerant using the
`
`guide unit in the third embodiment of the present invention.
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`25
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`FIG. 43 is an explanatory diagram of a jig that collects a refrigerant using anther
`
`guide unit in the third embodiment of the present invention.
`
`FIG. 44 is an explanatory diagram of a jig that collects a refrigerant using anther
`
`guide unit in the third embodiment of the present invention.
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`13
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`

`

`Marked-Up Specification
`
`FIG. 45 is a schematic flow chart of a method for dismantling household electrical
`
`appliances according to a fourth embodiment of the present invention.
`
`FIG. 46 is an explanatory diagram in which individual information of a household
`
`electrical appliance is read by using the household electrical appliance dismantling device
`
`according to the fourth embodiment of the present invention.
`
`FIG. 47 is a schematic flow chart of a conventional method for dismantling
`
`refrigerators.
`
`DESCRIPTION OF EMBODIMENTS
`
`In a dismantling process of electric appliances typified by refrigerators, operations
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`10
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`suitable for part materials of the electric appliances are required. The operations suitable
`
`for the part materials require understanding of the specifications of the electric appliances
`
`and processing information depending on the specifications.
`
`Products numbers displayed on the electric appliances are utilized to efficiently
`
`obtain processing information.
`
`15
`
`20
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`As a method of reading the product numbers displayed on the electric appliances,
`
`there is a character recognizing method. Some read character recognition result includes
`
`an erroneously recognized character. Various methods are proposed to obtain an
`
`accurate output from the character recognition result including the erroneously recognized
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`character.
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`As an example, in order to obtain an accurate output from a character recognition
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`result read by a scanner or the like, Unexamined Japanese Patent Publication 2001—312693
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`(Japanese Patent Publication) or the like is proposed.
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`In this literature, a certain specific
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`character is replaced, a certain specific character is deleted, a certain specific character is
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`deleted from a conversion candidate, or an order of conversion candidates is changed in
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`25
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`conversion of a character.
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`However, since a character recognition result read by a scanner or the like is
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`processed to specify a true value, i.e., a true product number, the next problem is posed.
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`More specifically, a lot of steps are expended to find a true character from characters
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`14
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`

`

`Marked-Up Specification
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`expected to be erroneously recognized. Since a lot of steps are expended, huge amounts
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`of time are required to understand a true product number.
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`Thus, a character string extraction device and an extraction method therefor
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`described in the second embodiment (will be described later) are used to solve the above
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`problems.
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`First Embodiment
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`A method for dismantling refrigerators and a refrigerator dismantling device
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`according to a first embodiment of the present invention will be described below with
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`reference to the accompanying drawings.
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`The description illustrates one concrete
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`10
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`example using a character string extraction device and a character string extraction
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`method according to the present invention.
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`The same reference numerals denote the same constituent elements described in
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`the background art, and the same description is applicable.
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`First, an explanation will be made with reference to FIG. 1 to FIG. 15.
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`15
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`As shown in FIG. 1, a refrigerator is collected from market 1 into recycle factory 2.
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`The collected refrigerator passes through step 10 to obtain processing information from
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`individual information. The processing information is information to identify a processing
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`step to be selected when processing steps are selected depending on applied materials in
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`dismantling of a refrigerator.
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`20
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`As shown in FIGS. 2 and 3, in storage unit 150, processing information 151 that is
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`associated with individual
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`information of refrigerator 40 to dismantle refrigerator 40 is
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`stored in advance (storing step 152).
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`Storage unit 150 is
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`included in refrigerator
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`dismantling device 159.
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`In individual information reading step 30, individual information
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`from refrigerator 40 is read by individual
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`information reading unit 41.
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`In processing
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`25
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`information fetching step 31, processing information to dismantle refrigerator 40 is fetched
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`from the read individual information by processing information fetching unit 42. As shown
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`in FIGS. 2, 3, and 5,
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`in processing information display step 32, the fetched processing
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`information is displayed on refrigerator 40 by processing information display unit 43
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`15
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`

`

`Marked-Up Specification
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`through processing information display part 46. When refrigerator 40 is moved while
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`being placed on a palette or the like, the processing information may be displayed on the
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`palette. Alternatively, the processing information may be directly printed on refrigerator
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`40.
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`As shown in FIGS. 1 and 8, in first determination step 11, first determination unit
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`56 determines, based on the processing information, whether refrigerator 40 is shifted to
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`preliminary processing step 12 or refrigerant collecting steps 19 and 20.
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`Refrigerator 40 that has been determined to be directly shifted to refrigerant
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`collecting steps 19 and 20 as a result of the determination made by first determination step
`
`10
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`11 is shifted by first control unit 153 to inside part collecting step 13 in which an inside part
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`is to be collected first (step 156).
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`In this case, inside parts such as shelves and drawers in
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`the refrigerator are collected. The collected inside parts are subjected to inside part
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`selection 14 in units of materials, inside part crushing 15, and shipping 16 as recyclable
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`resources.
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`15
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`"Refrigerator 40 is directly shifted to refrigerant collecting steps 19 and 20" means
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`that refrigerator 40 is shifted to refrigerant collecting steps 19 and 20 without passing
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`through preliminary processing step 12.
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`Unless
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`refrigerator 40 passes through
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`preliminary processing step 12, refrigerator 40 may be shifted to refrigerant collecting
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`steps 19 and 20 through another step on its way.
`
`20
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`On the other hand,
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`refrigerator 40 determined to be shifted to preliminary
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`processing step 12 as a result of the dete