Title:
DRIVING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/187892
Kind Code:
A1
Abstract:
The purpose of the invention is, in a driving device that can continuously drive by way of a push lever, to give notification that a trigger pulling operation is continuing by way of a sound after a fixed time when an operator maintains the trigger in an ON state. A driving device is provided with an air movement timer valve (65) that blocks an air passage from an air plug 58 to an accumulator chamber 50 and that opens and closes a compressed air outlet 85a passage from the accumulator chamber 50 to the atmosphere, and when a state in which a trigger lever 21 is pulled while a push lever is released continues for a prescribed time or longer, a portion of the compressed air in the accumulator chamber 50 is released to the outside from the outlet 85a. In this case, a sound accompanying the release is issued to notify the operator to the fact that the trigger lever 21 has not returned. If the trigger lever 21 is not returned even after the notification, all of the compressed air in the accumulator chamber 50 is released to the atmosphere at once and the air passage 53 from the air plug 85 to the accumulator chamber 50 is blocked.
Inventors:
NAGAO MASAYA (JP)
Application Number:
PCT/JP2017/013670
Publication Date:
November 02, 2017
Filing Date:
March 31, 2017
Export Citation:
Assignee:
HITACHI KOKI KK (JP)
International Classes:
B25C7/00; B25C1/04
Foreign References:
| JP2002254348A | 2002-09-10 | |||
| JPS5786776U | 1982-05-28 | |||
| JPS50128780U | 1975-10-22 | |||
| JPS51148873A | 1976-12-21 | |||
| JPH0270980U | 1990-05-30 | |||
| JPH0261580U | 1990-05-08 |
Other References:
See also references of EP 3450108A4
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