To facilitate the attachment work of a hook to a U-shaped metal fitting, and to avoid a danger to a worker at working.
This hook lock system for locking the hook 30 to the U-shaped metal fitting 20 includes a connecting device 200 which has an attachment part 210 attached with a flexible wire, to which the hook 30 is connected after passing in a ring of the U-shaped metal fitting 20 while the hook 30 is not connected, and which has a size for making the device pass in the ring of the U-shaped metal fitting 20. In the connecting device 200, there is formed a through-hole 240 to which a pin for releasing connection between the connecting device 200 and the hook 30 after the hook connected to the connecting device 200 is locked to the U-shaped metal fitting 20 by the pulling of the wire is made to pass after the hook 30 is connected.
| JP2001153124A | 2001-06-08 | |||
| JP2001153125A | 2001-06-08 | |||
| JPH01147375A | 1989-06-09 |
Takeshi Yamada
Hashimoto Toranosuke