`
`(11) Unexamined Japanese Utility Model Publication No. 860-38199
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`(21) Japanese Utility Model Application No. 858130163
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`(22) Date of Filingi August 23, 1983
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`(43) Date of Publication of Application1 March 16, 1985
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`(72) Deviser(s)3 Hideaki Shimizu
`
`(54) Title of the Device3 Blower
`
`(57) What is claimed is:
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`A blower configured in that there are provided a rotary shaft having
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`a fitting pin, and a vane plate fixed on a cylindrical set-bolt which is fitted
`
`onto the rotary shaft, and a fitting groove engaging the pin is formed at an
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`end portion of the set-bolt, having a vane formed with an escape depression
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`for creating a space between an inner edge portion of the fitting groove and
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`an outer surface of the rotary shaft as well as a holding member which is
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`threaded onto the rotary shaft to hold the set-bolt fitted onto the rotary shaft
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`between it and the pin, wherein the escape depression is formed only in a
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`portion at the side formed with the fitting groove, avoiding a portion in the
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`direction perpendicular to the direction formed with the fitting groove of the
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`set-bolt.
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`Brief description of the drawings:
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`Fig.
`
`1
`
`to Fig. 3 shows a conventional example.
`
`Fig.
`
`1
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`is a
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`longitudinal side view of an essential portion. Fig. 2 is a cross-sectional
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`
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`plane View of a main essential portion. Fig. 3 is a partially perspective View
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`of a set'bolt.
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`Fig. 4 to Fig. 6 shows one exemplary embodiment of the
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`present device. Fig. 4 is a longitudinal side View of an essential portion.
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`Fig. 5 is a cross-sectional plane View of a main essential portion. Fig. 6 is a
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`partially perspective View of a set-bolt.
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`In the drawings, reference numeral 1 is rotary shaft, numeral 2 is
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`fitting pin, numeral 4 is set-bolt, numeral 5 is vane plate, numeral 6 is vane,
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`numeral 21, 22 is fitting grooves, numeral 23, 24 is escape depression, and Q,
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`R is space.
`
`
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