| 摘要 |
PROBLEM TO BE SOLVED: To provide a door operating device which certainly functions in a small space in plural sheets of folding type insulated doors provided at a gateway of a refrigerator and a refrigerating chamber. SOLUTION: An operating device of an insulated door 40 has an upper door 41, a middle door 42 and a lower door 43 which are connected through hinges, and has a synchronized shaft 20 which is laterally suspendedly provided on right and left supports 2, 2 erected on a floor surface F and moreover rotated by a driving motor 15; a connecting means 81 which connects a synchronized chain 26 rotated through the shaft 20 to the lower door 43 and is fixed to the door 43; a plurality of ropes 59, 66 having weights 3, 4 which are severally suspended through a plurality of blocks 11 on a lateral beam 10 in the upper end part of the support 2 and vertically move along the support 2 in one end part; a plurality of ropes 59, 66 connected to the upper door 41 and the lower door 43 at their other end parts; and an upper block composing member 46 attached to the upper door 41 through a horizontal pivot lever 47 so as to run inside the second guide member 30 in the case of the ascending of the middle door 42 and a lower block composing member 60 attached to the lower door 43 through a horizontal lever. |
