| 摘要 |
PURPOSE:To provide an opening and shutting device of a rotary door having a neat appearance of the door surface and using fluid pressure in a loading platform for handlaze by loading an opening shutting mechanism of the door to the lower part downward from an underfloor surface of the loading platform for haulage and, at the same time, to eliminate a fixed metal fixture even in a full opening position by transferring expansion force of a cylinder to the door through a link mechanism to open and shut the rotary door using the fluid pressure in the loading platform. CONSTITUTION:One side end edge of a door body is pivoted on a column of a door frame 14 of a loading platform for haulage through a rotary arm 24 in a turnable manner, and a bearing member 28 extending downward from the lower end of an external side of the door main body and extending inward from an internal side of the door main body is fixed. One end of link construction is pivoted on the inside end of the bearing member in a turnable manner, and the front of a rod section of a cylinder expanded by fluid pressure is pivoted on the other end in a turnable manner. The door is opened and shut by transferring expansion force of the cylinder to the door through the link construction. |
