Elevator opened and closed door maintaining device

Abstract

The invention discloses a device for keeping an elevator door opened and closed, which consists of a compression spring and a pressure plate. The compression spring is fixedly arranged on the pressure plate; a downward salient is formed by the pressure plate under the pressure effect of the compression spring. The device also comprises a limit and reduction device and a tumbler shaped like an 'L'arranged on a door hanging plate; the tumbler is arranged on the door hanging plate by a shaft and can rotate around the shaft; the limit and reduction device is arranged on one end of the tumbler close to the door hanging plate, and controls the rotation of the tumbler according to the moving state of the door hanging plate. The invention has simple structure design and minor spring force needed for reduction of the tumbler, and thus the device of door opening and closing provided by the invention can work relatively stable; furthermore, the reduction spring in the limit and reduction device can be replaced and adjusted, and thus the device is convenient in terms of application.

Description

technical field [0001] The invention relates to an elevator, in particular to an elevator door opening and closing holding device. Background technique [0002] Fig. 1 is a structural schematic diagram of an elevator switch door holding device in the prior art, which includes a rotating arm 1, a compression spring 2 and a pressing plate 3, the rotating arm 1 is fixed on the door hanging plate 4, and the compression spring 2 is arranged on the pressing plate 3 On the upper part, under the action of the compression spring 2, the pressing plate 3 forms a downward protrusion. During the opening process of the elevator car door, the door hanging plate 4 moves to the left with the rotating arm 1. When the rotating arm 1 hits the protrusion of the pressing plate 3, the compression spring 2 is compressed, and when the rotating arm 1 crosses the protrusion of the pressing plate 3 When starting, the compression spring 2 and the pressure plate 3 will produce door opening resistance, a...

AI Technical Summary

Problems solved by technology

During the opening process of the elevator car door, the door hanging plate 4 moves to the left with the rotating arm 1. When the rotating arm 1 hits the protrusion of the pressing plate 3, the compression spring 2 is compressed, and when the rotating arm 1 crosses the protrusion of the pressing plate 3 When starting, the compression spring 2 and the pressure plate 3 will produce door opening resistance, adjusting the elasticity of the compression spring 2 can adjust the door opening resistance to meet the standard requirements; When moving over the protrusion of the pressing plate 3, the same large door-closing resistance will be generated, so when the elevator car door is about to close, it is necessary to overcome the same large door-closing resistance, making it difficult to design the driving force, so that the moving speed of the elevator car door will decrease. It is very uneven, and it is easy to cause faults such as the elevator car door not closing or the two elevator car doors colliding during the closing process of the elevator car door

[0003] Japanese patent application No. Ping 10-262700 discloses a related technology of an elevator switch door holding device. As shown in Figure 2, the rotating arm 1 can rotate around the shaft 7, and a torsion spring 6 is installed at the rotating shaft 7, and the rotating arm There is a baffle 5 at the left end of the elevator car door. When the pivoting arm 1 moves to the right and crosses the protrusion of the pressing plate 3 during the closing process of the elevator car door, the pivoting arm 1 can rotate around the axis 7, so that it will basically not be subject to door closing resistance. , when the elevator car door is closed, the rotating arm 1 is reset to the initial position under the action of the torsion spring 6; 5. Prevent the pivoting arm 1 from moving to the left, which can ensure a certain resistance to opening the door, but the force arm at the pivot 7 is relatively small, and the spring force required to keep the pivoting arm 1 reset is relatively large, which makes it inconvenient to adjust the spring force of the torsion spring 6, and The structure is also unstable

There is also an embodiment in this patent, which is that a retaining force spring and a return spring are respectively arranged on both sides of the rotating arm 1. Because the force of the retaining force spring and the return spring are different, the realization of this structure should be more complicated.

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