| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a torque wrench having a cam-type torque detection mechanism capable of detecting torque with high accuracy and allowing a user to safely fasten members to be fastened such as a bolt with natural handling feel after torque detection. <P>SOLUTION: In the torque wrench having the cam-type torque detection mechanism, a cam portion 27 formed at the outer periphery of a cam cylinder 22 includes: a static engaging cam surface 27a with which a roller member 18 at a standstill engages while it is not operating; a torque peak increasing cam surface 27b that is linked to the static engaging cam surface 27a and gradually increases the peak value of the torque when the roller member 18 moves while being in contact with the torque peak increasing cam surface 27b; a cam top surface 27c that is linked to the torque peak increasing cam surface 27b and forms a cam top portion; a torque reducing cam surface 27d that gradually reduces the positive torque applied to the roller member 18 to zero; and a negative torque cam surface 27e that applies negative torque to the roller member 18 after it has passed through the torque reducing cam surface 27d. <P>COPYRIGHT: (C)2011,JPO&INPIT |
