| 摘要 |
PROBLEM TO BE SOLVED: To prevent concentrated wear of one side of a lock pin and to prevent the occurrence of defective operation to the lock pin. SOLUTION: When a pan 1 is unloaded from a cargo-carriage platform, an inclining mechanism 50 is provided to incline downward the pan 1. The inclining mechanism 50 comprises a boss member 51 situated at a boom 20; and the lock pin 53 inserted in the boss member 51. By locking a rib 4 of the pan 1 at the tip part of the lock pin 53 protruded to a protrusion position D, the pan 1 is fixed on the boom 2 side and unloaded in an inclined attitude. As a result of the tip part of the lock pin 53 being moved aside to a moving- aside position C and separated away from the rib 4, the pan 1 is unloaded in a standing-up attitude. A fine part 53a is formed at the tip part of the lock pin 59 and when the lock pin 53 is locked at the rib 4, the rib 4 is slid over the fine part 53a. The lock pin 53 is constituted in a manner to be rotatable in a slide direction C of the rib 4 centering around an axis 66.
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