| 摘要 |
PROBLEM TO BE SOLVED: To provide a hook structure with a compact automatic rope removing mechanism which enables a rope for a lifted load to be reliably removed from the hook structure by merely one rope removal (removal of sling, removal of load) operation while maintaining the existing superior effects.SOLUTION: When a drive gear 12b is rotated to slew a support arm 10a while a slip-off prevention lever 8b is set so that the opening 6p of a hook is closed after the rope for the lifted load is attached to the hook 6 through the opening, the rotating motion of the drive gear is transmitted to an interlock gear 12a through a transmission gear 12c, and the interlock gear is rotated to slew the support lever 8a. According to the slewing of the support arm, a rope removal arm 10b is moved to press the rope for the lifted load attached to the hook toward the opening, and according to the slewing of the support lever, the slip-off prevention lever 8b is moved in the direction in which the lever is retreated through the opening. Consequently, the rope for the lifted load is automatically removed through the opening of the hook by the rope removal arm. |
