SCREW MEMBER FASTENING TOOL, AND COUNTING DEVICE

Title:

SCREW MEMBER FASTENING TOOL, AND COUNTING DEVICE

Document Type and Number:

WIPO Patent Application WO/2017/043535

Kind Code:

A1

Abstract:

[Problem] To provide a screw member fastening tool whereby it is possible to return a count value only in cases when the screw member removed by reverse-rotation driving is counted as a fastened screw member in association with the reverse-rotation driving performed by the screw member fastening tool. [Solution] An electric screwdriver is equipped with a calculation unit that is capable of switching between a count mode in which the number of fastened screw members is counted and the counted value is stored as a count value, and a count return mode for returning the count value to the previous value. When the calculation unit switches to the count return mode, the count value is returned to the previous value on the basis of an engagement tool mounting portion being driven in the reverse rotation direction.

Inventors:

HITA HIROKAZU (JP)
OTSUKA KENJI (JP)

Application Number:

PCT/JP2016/076320

Publication Date:

March 16, 2017

Filing Date:

September 07, 2016

Export Citation:

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Assignee:

NITTO KOHKI CO (JP)

International Classes:

B25B23/14

Domestic Patent References:

WO2008105057A1	2008-09-04
WO2006025181A1	2006-03-09

Foreign References:

JP2008279589A	2008-11-20
JP2007111797A	2007-05-10
US4446745A	1984-05-08

Other References: