| 摘要 |
PROBLEM TO BE SOLVED: To provide a canopy open/close device that can securely prevent canopies under opening operation from moving and canopies positioned at an open position from hopping up.SOLUTION: A canopy open/close device comprises: a pair of left and right canopies 5L and 5R for covering an upper side opening portion 1a opening above a packaging box 1 to be freely openable and closable; and an operation device 8 for opening and closing operation of the canopies 5L and 5R, where the canopies 5L and 5R can move between a closing position to close the upper side opening portion 1a and an opening position to open the upper opening portion 1a. In addition, the device comprises: a first reverse rotation prevention mechanism 41 for permitting the opening direction operation and inhibiting the closing direction operation of the canopies 5L and 5R; a second reverse rotation prevention mechanism 42 for permitting the closing direction operation and inhibiting the opening direction operation of the canopies 5L and 5R; and a switching lever 43 for selectively actuating either one of the first and the second reverse rotation prevention mechanisms 41 and 42. |
