| 摘要 |
PROBLEM TO BE SOLVED: To enable an operational handle hooking device to be improved in its safety and reliability and to be attached easily at a low cost as the result of capability of certain recognition, on the driver seat side, of the grade of engagement of an operational handle with a lock hook engagingly attached thereto in a cab lock structure for jointing the cab to the chassis of a truck. SOLUTION: A switch 2 is fixed attachably to/detachably from a lock hook 4 for engagingly locking a recess grove part 16 to the fitting pin 9 of an operational handle 3, and an operational piece 6 of the switch 2 makes contact with a contact surface 5 of a comparatively wide area on the opertional handle 3 side and subjected to switch-off. In addition, when the engaging attachment is released, switch 2 is immediately set to ON. As stated above, the grade of engaging attachment between the operational handle 3 and the lock hook 4 is certainly confirmed. |
