| 摘要 |
PURPOSE:To prevent a disaster previously by fitting a detecting member to be compressed and damaged when external force is applied by the action of upper and lower tensile force to detect overload to an intermediate part of a shackle of a holding tool or a hanging tool. CONSTITUTION:A slit 21 passing through the center of a hanging hole 7 continuously to the hanging hole 7 is formed on the shackle 8 having the hanging hole 7 which is coupled with the inside of a body by a shaft 20 through a pivoted gum and pivoted rods 19a, 19b. A circular hole 22 is drilled on the way of the slit 21 and a conical detecting metal 23 is tightly inserted into the circular hole 22 and sealed by a label 24. When a wire and a hook are hung to the hanging hole 7 and the hanging hole 7 is used so as to be lifted, the hole 7 is slightly displaced like an egg shape and the detecting metal 23 is displaced by the existence of the slit 26. If whether the clamping tool is to be removed or not is decided by observing the status of the displacement, a disaster can be previously prevented. |
