| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a ratchet type screw fastening tool that can adjust fastening torque of a screw by using clutch means.SOLUTION: A tool holder 1 comprises: a base; a circular recessed part formed at a position concentric to a center line of the base; a ratchet drum 5 which is rotatably inserted into the recessed part and has ratchet means provided; clutch means 7 that inhibits rotation of the ratchet drum by pressing the drum until predetermined rotation force is applied to the ratchet drum from a rotation part of the screw fastening tool; an attached part, formed at a position concentric to the center line of the base, to which the rotation part of the screw fastening tool is detachably attached; and a connection part which is detachably attached to a socket detachably attached to a screw.</p> |
