| 摘要 |
<p>PURPOSE: To provide an arm clamp which can be attached to the arm of a concrete pole, etc., by a single action. CONSTITUTION: When a shaft 3 is pulled down, a hook 6 fixed to the front end section of the shaft 3 moves downward and is engaged with a metallic member 1. When the hook 6 is put on the member 1, the internal surface 7 of the hook 6 comes into contact with a metallic piece 5 and pushes the piece 5 forward and an arm is strongly held between the front wall of the hook 6 and the piece 5.</p> |
