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Title:
ELECTRIC TOOL
Document Type and Number:
WIPO Patent Application WO/2019/208105
Kind Code:
A1
Abstract:
Provided is an electric tool having a tightening mode for soft board added as one operating mode. In addition to an impact mode (first mode) for tightening a screw into a target material by utilizing impacts obtained by means of an impacting mechanism, an impact type electric tool is also provided with a tightening mode (second mode) for use with soft board, in which impacting is not performed. In the second mode, a motor rotates when an operator operates a trigger, a screw 73 is tightened into a target material (71, 72) in a state in which impacting is not being performed, and the rotation of the motor is stopped when the screw 73 is seated. In control thereof, a determination is made to ascertain whether a motor current has exceeded a seating stop threshold, and if the seating stop threshold has been exceeded the motor is stopped irrespective of the trigger operation. If the trigger is then pulled again, the control device stops the rotation of the motor after follow-up tightening has been performed for a prescribed length of time.

Inventors:
ISHIKAWA Yuki (1060, Takeda Hitachinaka-City Ibaraki, 02, 〒3128502, JP)
NISHIKAWA Tomomasa (1060, Takeda Hitachinaka-City Ibaraki, 02, 〒3128502, JP)
Application Number:
JP2019/014017
Publication Date:
October 31, 2019
Filing Date:
March 29, 2019
Export Citation:
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Assignee:
KOKI HOLDINGS CO., LTD. (15-1, Konan 2-chome Minato-k, Tokyo 20, 〒1086020, JP)
International Classes:
B25B21/02; B25B23/14
Domestic Patent References:
WO2009001678A12008-12-31
Foreign References:
JP2017213619A2017-12-07
JP2015208784A2015-11-24
JPH07132425A1995-05-23
JPH08141928A1996-06-04
JP2013255987A2013-12-26
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