| CPC B25C 1/047 (2013.01) [B25C 1/042 (2013.01); B25C 1/008 (2013.01); B25C 1/043 (2013.01)] | 10 Claims |
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1. A pneumatic tool comprising:
a drive part configured to be driven by compressed air;
a control valve configured to switch presence or absence of operation of the drive part;
an on-off valve part configured to switch presence or absence of operation of the control valve; and
a timer part configured to control operation of the on-off valve part and switch presence or absence of operation of the control valve after a lapse of a predetermined time,
wherein the timer part comprises a timer piston configured to move in one direction, and a timer piston cylinder configured to support the timer piston such that the timer piston can slide,
wherein the pneumatic tool comprises a throttle part configured to throttle a flow rate of air flowing into or flowing out from the timer piston cylinder, and an adjustment part configured to adjust an operating time of the timer piston,
wherein the timer part comprises a timer piston housing assembly in which a plurality of timer piston housings supporting the timer piston are fitted in an axial direction of the timer piston, and
wherein, in the timer piston housing assembly, a flow path is formed between the plurality of timer piston housings, and the plurality of timer piston housings are fitted via a plurality of ribs for aligning positions of central axes of the plurality of timer piston housings, the plurality of ribs being provided on an inner wall surface or an outer wall surface of one of the timer piston housings, wherein the plurality of ribs each extend in an axial direction of the one of the timer piston housings.
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