| 摘要 |
An output portion (14c) is provided at a left end portion of a clamp arm (14) which is supported by a housing (12) so as to be swingable in an up-down direction. A first hole (22) for mounting a spring is formed in a left end portion of the housing (12) so as to be opened obliquely upward toward the output portion (14c). A through hole (24) is provided in a left end-adjacent portion of the clamp arm (14) so as to extend obliquely upward and provide communication between an upper surface and a lower surface of the clamp arm (14). In the through hole (24), a second hole (24a) for mounting a spring and a female screw hole (24b) are formed in this order so as to extend upward. A return spring (26) mounted in the first hole (22) and the second hole (24a) biases the output portion (14c) upward. A pressing bolt (28) screwed into the female screw hole (24b) from above compresses the return spring (26). |
