Tohnichi Mfg. Co., Ltd.

Kyo Kan

Hiroshi Tsuji

Tomohiro Ogata

Naoya Masuda

Shozo Aikawa

To make improvements in torque wrenches with a torque limiter that uses a cam mechanism and to provide a torque wrench that realizes more stable operation and is capable of highly precise tightening. In a torque wrench with a torque limiter that uses a cam mechanism, a solid columnar roller memberis engaged with a cam partof a cam shaftsuch that it is rotatably supported by a roller support lever membermounted in a head portionsuch as to be rotatable around a support shaftand such that it is pressed against the cam partby a spring force transmitting rodbiased by a torque setting spring. The roller support lever memberis configured such that the distance rfrom the support shaftto a point of application of force of the spring force transmitting rodis longer than the distance rfrom the support shaftto the roller member

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Tokyo, Japan

Kyo Kan