| 摘要 |
PURPOSE:To prevent a door from opening at pressure drop by a system wherein a clutch system is provided for the power axis and the connecting system of a door to allow to maintain the door at ascending position and cut-off the clutch when the operation fluid pressure is dropped at the position of the door closed. CONSTITUTION:Power axis 14 and rocking axis 5 are ascending fully. Under closing condition of the door 1 where the interlocking pawl of the door 1 and the pawl ring are connected, the pressure switch 85 is activated to project the power axis 20 of a supporting cylinder 19 when the actuation fluid pressure is dropped, the point thereof being positioned at the low side of the base 21 of the rocking axis 5. On the other hand, the bearing 64 of the base 21 of the rocking axis 5 is descended by lowering the pressure to allow to make contact with the power axis 20 point. The power axis 14 of the open/close cylinder 13 descending therewith is lowering slightly until the shoulder 59 makes contact with the bearing 57 to allow the clutch pawl 68 to disconnect from the clutch groove 66. Accordingly, the door is remaining the position closed. This permits to eliminate to open the door by accidental pressure drop. |
