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1. 发明专利

JPH1058339A POWER WRENCH 失效
公开(公告)号：JPH1058339A
公开(公告)日：1998-03-03
申请号：JP23856396
申请日：1996-08-20
申请人： ASAHI KINZOKU KOGYO KK , JANOME SEWING MACHINE CO LTD
发明人： MIYANO HIKARI , FUKUMOTO TSUGIO , SATO ISAMU , TSUCHIDA RYUICHI
IPC分类号： B25B21/00
摘要： PROBLEM TO BE SOLVED: To provide a power wrench having the capability of tightening and loosening a tightened object such as a bolt, with the handle of a wrench body kept along an arbitrary direction at all times, regardless of the position of a projection for the contact of a reaction receiver. SOLUTION: This wrench is formed to have a wrench body and a reaction receiver 2. The wrench body has a easing and a screw tightening and loosening rotary shaft 4 rotatably projected for the casing. The end of the casing is fitted with a cylindrical body 33 having ratchet teeth 33b engraved. Also, the reaction receiver 2 has a reaction receiver body 6 and a projection engagement member 8 for engagement with a projection, and the reaction receiver body 6 is provided with a ratchet mechanism 64 having a clockwise rotation tooth 64a and a counterclockwise rotation tooth 64b. Then, the clockwise rotation tooth 64a or the counterclockwise rotation tooth 64b of the reaction receiver body 6 gears with the ratchet teeth 33b of the cylindrical body 33, thereby enabling the reaction receiver 2 to be engaged with the wrench body in such a state as freely rotatable in a unilateral direction and not rotatable in a direction opposite thereto.

2. 发明专利

JPH1015844A MOTOR-DRIVEN NUT RUNNER 失效
公开(公告)号：JPH1015844A
公开(公告)日：1998-01-20
申请号：JP17509496
申请日：1996-07-04
申请人： JANOME SEWING MACHINE CO LTD , ASAHI KINZOKU KOGYO KK
发明人： TSUCHIDA RYUICHI , WAKAIZUMI KIYOSHI , KODAMA NAGAHIRO , MIYANO HIKARI , FUKUMOTO TSUGIO , SATO ISAMU
IPC分类号： B25B23/14
摘要： PROBLEM TO BE SOLVED: To detect the direction of rotation to perform torque control effectively by providing a pair of straining elements in the internal gear part of a planetary gear speed changing part and a pair of strain gages that operate in conjunction with the straining elements, for normal and reverse rotations, and controlling torque using the strain gages. SOLUTION: Straining elements 4 are provided which are fixed relative to the rotation of the internal gear of a planetary gear speed changing part, and strain gages 5 are provided which are bonded to the straining elements 4. When torque is applied by tightening of a nut, torque in the direction of reaction is produced in the internal gear, straining the strain gages 5. The straining elements 4 are provided by two so that normal and reverse rotations can be detected separately according to the direction in which the torque is applied, and the strain gages 5 are also provided by two. Thus when the two strain gages 5 are provided, different torques can be set for screw tightening action and for screw loosening action; i.e., it is possible to solve the problem with loosening of the screws that the screws cannot be loosened unless torque higher than that required for tightening them is applied.

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