JPS5811817Y2 - Elevator door armrest - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an elevator safety device.

In general, doors that open and close electrically have a mechanism that immediately flips the door in the opening direction when a passenger comes into contact with the door while it is closed, so that it is safe even if a passenger or luggage accidentally gets caught in the door when the door is closed. There are safety devices in place.

Conventionally, various types of devices have been considered as this type of device, and one of them is the following.

While the door is being opened/closed, an activation frame that detects when a passenger or luggage hits the door always protrudes approximately 40 to 60 mm from the tip of the door along the opening/closing direction, and when the door is opened, a retraction cam forces the activation frame to operate. This is a device that retracts the frame to the back of the door.

However, since the operating frame is supported by the door by parallel links, the operating frame lowers at the same time as the vehicle moves backward, resulting in a lack of safety.

That is, when a person or an object contacts the operating frame and causes the operating frame to move backward, this movement is converted into a rotational movement and a switch on the electric circuit that controls the door is turned on and off. If they descend at the same time and somehow get caught between a fixed part such as a sill and the operating frame, there is a risk of injury to the passenger's legs in the former case, and in the latter case, There were problems such as damage to luggage, forcibly stopping the door, and burning out the door opening/closing motor.

Further, the retraction cam is usually attached to the floor side, and a component for retracting the operation frame, such as a roller, rides on the retraction cam to obtain a retraction force for the operation frame.

For this reason, the moment the roller engages with the retraction cam, the force is large, and the reaction force may lift the door.Also, even when the door is fully open, the roller is on the retraction cam, so there is no force to lift the door. Since the door works constantly, there is a drawback that the door holding and opening operations become unstable.

The purpose of the present invention was made in view of the above points, and is to provide an elevator door safety device that has a higher degree of safety and stable operation.

This invention improves the parallel link from the conventional downward direction to the upward direction so that the operating frame rises during operation, and also provides a tension spring between the switch seat and the door to maintain their positional relationship. The action is forced.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

The door 1 is suspended on a horizontally disposed rail by a hanging roller 2, guided to a sill on the floor by a shoe 3 provided at the lower end, and electrically opened and closed in the horizontal direction.

On the doorstop side of the door 1, an operating frame 4, which is a sensing section, is located long in the height direction of the door. parallel link 7
．． 8, and is configured to move in parallel at the middle end of the door 1 (on the doorstop side).

A switch seat 9 is rotatably supported on the back side of the door coaxially with the parallel link 8 on the lower mounting seat 6, and a pin 10 is fixed to the switch seat 9, and a pin is also attached to the mounting seat 6. 11 is fixedly installed.

A tension spring 12 is attached between both pins 10.11 to constantly pull up the switch seat 9 so that the parallel link 7.8 is rotated in the same direction as the direction in which the operating frame 4 is rotated by its own weight. It provides rotational force.

The rotation direction range of the switch seat 9 by the tension spring 12 is regulated by a stopper 13 provided on the mounting seat 6 to maintain the normal position.

The parallel link 8 has an extending portion 14 substantially parallel to the support shaft side, and an adjusting actuating pin 15 on the extending portion 14 to press an actuating roller 17 of a switch 16 attached to the opposing switch seat 9. I try to do that.

When the actuating roller 17 is pressed, the switch 16 is actuated to close the elevator door electrical circuit.

On the other hand, the operating frame 4 is always given a rotational force by its own weight W1 (FIG. 1) in a direction in which the operating frame 4 protrudes from the width direction end of the door 1, and this rotation causes the movable member provided on the extending portion 14 to The adjustment stopper 18 comes into contact with the opposing switch seat 9 and rotates the switch seat 9 in the same direction as the direction in which the tension spring 12 acts.

This rotation of the switch seat 9 continues until the stopper seat 9 comes into contact with a stopper 13 provided on the mounting seat 6, and when the stopper seat 9 comes into contact, the operating frame 4 is held at the normal position.

FIG. 2 shows a state in which the door 1 is fully opened, and let us now consider a time when the door 1 is approaching the fully opened state.

A "shaped regressive cam 20" having an inclined part on the downward surface of the horizontal side that becomes thicker in the door opening direction is provided on the floor surface of the door compartment.

This retraction cam 20 is mounted so that the tip of the thin side of the sloped portion faces toward the switch seat 9, and is at a height where the tip of the thin side of the slope comes into contact with the roller 19 rotatably attached to the switch seat 9. installed.

When the door 1 is opened for the retracting cam 20 having such a configuration, the roller 19 is attached to the tip of the inclined portion of the retracting cam 20 on the thin side.
touches.

When the door 1 is further opened, the roller 19 is pushed down while rolling along the inclined surface.

By pressing down the roller 19, the switch seat 9 rotates about a common shaft with the parallel link 8 in a direction opposite to the tension spring 12.

Since this switch seat 9 maintains contact with the stopper 18, the parallel link 8 is also rotated in the same direction, and the one-casing operating frame 4, which keeps the switch 16 closed, is eventually retracted upward.

In this way, when the door is fully opened, the operating frame 4 retreats to the rear surface of the door leaving the necessary minimum protrusion amount αl as shown in FIG. 2, thereby securing the entrance/exit.

As described above, this is a door safety device in which the operating frame 4 protrudes while the door is being opened and closed, and the operating frame retracts to the back surface of the door when the door is fully opened.

Now, in FIG. 3, if there is an obstacle 21 such as a passenger or luggage on the path of the door 1, the obstacle 21 will come into contact with the operating frame 4, and the contact force will cause the operating frame 4 to move from the normal position indicated by the chain line. As shown in the figure, the parallel link 8 is also rotated at the same time as it moves upward and backward.

The rotation of this parallel link 8 causes the stopper 1 of the extension portion 14 to
8 is separated from the switch seat 9.

At this time, since the switch seat 9 is given a rotational force in the opposite direction to the rotation of the parallel link 8 by the spring force of the tension spring 12, it does not follow the rotation of the parallel link 80.

Therefore, the actuating roller 17 of the switch 16 separates from the adjusting actuating pin 15 attached to the extension 14 of the parallel link 8, and the switch 16 is actuated, breaking the closing electrical circuit of the door 1 and forming a reversing circuit so that the door is closed. Reverse operation.

According to the present invention, a safer elevator door safety device is obtained, which is free from the possibility of getting caught between the lower end of the operating frame and a fixed part such as a sill and causing injury to passengers. In addition, the mechanism is simple and inexpensive, and the engagement between the retraction cam and the roller that is pressed during the door opening operation applies an engagement force to the door in the direction of its own weight, so the door floats when engaged. Therefore, the opening operation does not lack smoothness, and the door can be stably held even when fully opened.

[Brief explanation of the drawing]

Fig. 1 is an overall view of the back side of an electric door equipped with a safety device that is an embodiment of the invention, Fig. 3 is a detailed view of the main parts showing a state in which a passenger or the like touches the operating frame and the switch is open, and Fig. 2 The figure is a detailed view showing a state in which the operating frame retracts while the switch is closed and the door is fully opened. 1... Door, 4... Operating frame, 5, 6.
...Mounting seat, 7.8 ...Parallel link, 9
...Switch seat, 12...Tension spring, 14...Extension portion, 20...Regression cam.

Claims (1)

[Scope of utility model registration request] A door suspended on a horizontal rail by a hanging roller and guided to a sill parallel to the rail by a shoe, a plurality of parallel links rotatably attached to the widthwise end of the back surface of this door, and these parallel links. an operating frame that is rotatably attached to the other end of the link and is long in the door longitudinal direction; an extension provided at the door side end of the lower parallel link among the plurality of parallel links; and the lower parallel link. a switch seat that is rotatably attached to the back surface of the door so as to be coaxial with the switch seat and is constantly pulled upward by a tension spring to apply a rotational force in the same direction as the direction in which the parallel link is rotated by the weight of the operating frame; and a switch mounted on the floor of the door pocket of the door at a position opposite to the extension of the switch seat, and a switch mounted on the floor of the door compartment of the door, with a thickness extending toward the door opening direction on the downward surface of the horizontal side facing the floor. a retracting cam having an inner slope, and a roller installed at a position opposite to the thin end of the slope of the switch seat, so that when the door is fully opened, the lower surface of the horizontal side of the retracting cam The elevator door is characterized in that a roller of the switch seat is inserted into the switch seat, the switch seat is rotated in a direction opposite to the tension spring, and the operating frame is retreated upward via the parallel link. Device.