JPS6033757B2 - Elevator door safety device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a safety device for an elevator door.

The following safety device is known as a safety device for electric elevator doors.

That is, two members engaged with each other so as to be relatively displaceable are arranged as part of the transmission mechanism of the door device, and these two members are held so as not to be relatively displaced by the normal opening and closing force of the sliding door. do.

If an abnormal load is applied to the sliding door when it is opened or closed, a relative displacement occurs between the two members against the holding force, and this relative displacement activates the detection device to stop the sliding door. Or there are those that operate in reverse. This kind of safety device detects abnormalities in both the door and the door closing, such as when a passenger collides with the door when the door is closed, or when a passenger's finger gets caught between the sliding door and the green area of the entrance when the door is opened. It is possible. However, the above-mentioned safety device has the following drawback, which will be explained with reference to FIGS. 1 and 2.

Figure 1 is the driving force diagram when the sliding door is opened, and Figure 2 is the turbulence force diagram when the sliding door is closed.When the door is closed, the sliding door is accelerated by the force FI and moves at a constant speed. It is decelerated by force F2 and fully opened.

Therefore, the purpose can be achieved by setting the abnormal load detection value when the door is opened to a value F5 that is slightly larger than FI. However, when the sliding door is closed, it is accelerated by force F3 and operates at a constant speed, and at the end of the sliding door is decelerated by force F4 and fully closed. For this reason, the force F
If the force 5 is not greater than the force F4, the safety device will malfunction when the door is opened. Furthermore, for the same reason as when closing the door, it is necessary to make the abnormal load detection value F6 larger than the force F2 when closing the door. Therefore, both abnormal load detection values F5 and F6 become larger than necessary, and the sensitivity of the safety device decreases. In other words, there was a problem in which the danger to passengers who collided with or got caught in the sliding door increased. The present invention solves the above-mentioned drawbacks and provides a safety device for an elevator door that operates with high sensitivity both when the door is closed and when the door is closed.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 4.

In the figure, 1 is the elevator car, 2 is the entrance and exit of this, 8
2 is a sliding door that opens and closes the entrance/exit 2; 4 is a drive motor; 5 is a transmission mechanism whose both ends are connected to the drive motor 4 and the sliding door 3; 6 is a safety device; and 7 is a part of the transmission mechanism 5. 7a is a vertical cavity opening on the free end side of the first member 7, and 7b is a longitudinal cavity opening on the free end side of the first member 7. The protrusion 8 protruding from the outer surface also forms a part of the safety device 6 and the transmission mechanism 5, and is a second member whose one end is pivoted to the sliding door 3 side, and whose free end side is connected to the longitudinal cavity 7a. A recess 8a having a V-shaped bottom surface is provided in the insertion portion into which the insertion portion is loosely inserted.

Reference numeral 8b denotes a door-closing holding force mechanism consisting of a first slope formed on the negative side of the V-shaped bottom surface of the recess 8a, and has an angle of 01 with respect to the axis of the second member 8.

8c is a door-opening holding force mechanism 8d consisting of a second slope having an angle of 82 with respect to the door closing holding force mechanism 8b, and 8e is a side wall of the recess 8a, and 8e is provided protruding from the pivot end of the second member 8. Tebutsu 7b
An arm portion 9 disposed above and facing the first member 7 is a holding device that is attached to the first member 7 and is disposed corresponding to the recess 8a. A retainer consisting of a roller mounted on the V-shaped tip, 9b is a retaining device 9
The retainer 9a is pressed into the recess 8a by a biasing body made of a compression coil spring whose pressing force can be adjusted by means of a bolt.

1 is a door opening abnormality detection device which is attached to the arm 8e and whose actuating part is loosely attached to the pivot end side of the second member 8 of the protrusion 7b; This is a door opening abnormality detection device consisting of a switch supported on the pivot end side of the first member 7 of the protrusion 7b.

Now, if sliding door 3 is to be closed from the state shown in Figure 3,
A force is applied to separate the first and second members 7 and 8, but the retainer 9a
The first and second members 7 and 8 are held so as not to be displaced relative to each other by the pressing force and the angle a2 of the door opening holding force mechanism 8c.

If a passenger's hand is caught between the sliding door 3 and the twill of the entrance 2 while the door is being opened, and an abnormal load is applied to the sliding door 3 when the door is opened, the first
, the second members 7 and 8 are pulled and relatively displaced. As a result, the door opening abnormality detection device 11 is activated by the protrusion 7b,
Through this, the drive motor 4 is reversely driven and the sliding door 3 is closed. Furthermore, if no abnormal load is applied to the sliding door 3 during opening, the force F2 in FIG. Therefore, the door opening abnormality detection device 11 will not operate due to the force F2, and the abnormal load detection value at the time of door opening can be reduced by 4.0 as much as possible. Also, when the sliding door 3 is reversed due to an abnormality when the door is opened, a large reversing force acts on the first and second members 7 and 8, but this is also in the opposite direction to the force FI, so this can be used to detect an abnormality when the door is opened. The device 11 does not operate. Therefore, the abnormal load detection value when the door is opened can be set low, making it possible to improve the sensitivity of the safety device and increasing the safety of passengers and the like. Furthermore, when the fully opened sliding door 3 is opened, a force that brings the first and second members 7 and 8 closer together acts;
The first and second members 7 and 8 are prevented from relative displacement by the pressing force of the retainer 9a and the angle 81 of the door closing force mechanism 8b against the normal door closing force, that is, the force F3 in FIG. Retained.

If an abnormal load is applied to the sliding door 3 while the door is closed, the first and second members 7 and 8 will be relatively displaced against the holding force of the holding device 9, and this will cause the door to be closed abnormally. Device 1
0 operates, the sliding door 3 is involved in the reversing door in the same way as when the door is opened abnormally. In addition, if no abnormality occurs when the door is closed, the door closing abnormality detection device 1
0 will not operate, so a detailed explanation will be omitted, but when the sliding door 3 is closed, the same effect as that when the door is opened can be obtained. In this embodiment, the angles 81 and 02 of the door closing force mechanism 8b and the door closing force mechanism 8c are
It is possible to suitably set the holding force of the holding device 9 when the door is closed and when the door is closed.

5 and 6 show other embodiments of the present invention. In the figures, the same reference numerals as in FIG. 4 indicate corresponding parts, and 8 is a second member provided with a recess in the middle part, 8f is a through hole provided at the opposite end of the pivot joint, 8g is a first projecting wall that protrudes from the recess of the second member 8 and is provided near the through hole 8f and has a screw hole, and 8h is a first projecting wall. A second projecting wall 8i formed in the same manner as the wall 8f and disposed near the pivot end of the second member 8 consists of a support that is screwed into the first projecting wall 8g and has a through hole in its center. Holding force mechanism when the door is opened, 8k' is screwed into the second projecting wall 8h, and the holding force mechanism when the door is closed is made up of a support odor with a through hole in the center. hole 8
7c is a first member loosely inserted into the holding force mechanism 8i when the door is open, and 7c is an actuating piece whose center portion is screwed into the screw of this member and whose outer periphery is loosely inserted into the through hole of the holding force mechanism 8i when the door is opened. ,7b
7d is a protrusion that is protruded from the actuating piece 7c, 7d is a ring body which is loosely attached to the first member 7 and abuts the end face of the actuating piece 7c and the inner wall surface of the actuating piece 7c, and 9 is inserted into the first member 7. A door barrier holding device consisting of a compression coil spring whose both ends are respectively loosened on the nut 7d and the side surface of the through hole 8f of the first member 7;
12 is a pusher whose one end is loosely inserted into the through hole of the door closing force mechanism 8k and whose other end is in contact with the tip of the screw of the first member 7; 13 is a nut screwed into the insertion end of this pusher; Reference numeral 9' denotes a door-closing holding device which is inserted through the pusher 12 and is composed of a compression coil spring supported at both ends by a support 8h and a side surface of the pusher 12 on the abutting end side. That is, when an abnormal load is applied when the door is opened, the first member 7, that is, the actuating piece 7c is displaced against the holding force of the door holding device 9, and the door opening abnormality detection device 11 operates. The door opening abnormality detection device 11 does not operate due to the normal final deceleration at the time of door clearance. Furthermore, when an abnormal load is applied when the door is closed, the actuating piece 7c is displaced against the holding force of the door-closing holding device 9', and the door-closing abnormality detection device 10 is activated. The normal terminal deceleration does not cause the door-closed abnormality detection device 10 to operate. Therefore, although a detailed explanation will be omitted, it is possible to set the abnormal load detection values of the door-closed and door-open abnormality detection devices 10 and 11 low, so that in this embodiment as well, as shown in FIGS. It is clear that the same effect as in the example can be obtained. In addition, the holding force mechanism 8i at the door
The holding force of the door opening holding device 9 is increased by rotating the
By rotating the door closing holding force mechanism 8k, the holding force of the door closing holding device 9' can be easily adjusted. This causes a difference in the normal opening/closing resistance of the sliding door 3 depending on the door device, but it is possible to easily set an abnormal load detection value during door opening/closing corresponding to this difference. As explained above, the present invention drives a sliding door through two members configured to be able to move relative to each other, normally maintains the relative displacement of the two members within a predetermined range, and applies an abnormal load to the sliding door when the door is closed. When an abnormal load is applied to the sliding door when the door is closed, the two members are caused to undergo abnormal displacement when the door is opened and through the retention force mechanism when the door is closed when the door is closed. a holding device;
Since we have provided a door opening abnormality detection device that operates in response to the above abnormal displacement and a door opening abnormality detection device installed separately, the abnormal load detection values of these respective abnormality detection devices can be reduced to the necessary minimum. This provides a safety device for elevator doors that is configurable, has good sensitivity, and has a high degree of safety for passengers and the like.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a driving force diagram of the elevator door when the door is closed, Fig. 2 is a driving force diagram of the elevator door when the door is closed, and Fig. 3 is an implementation of the elevator door safety device according to the present invention. A front view of an elevator door showing an example, FIG. 4 is an enlarged sectional view of the main part of the W section in FIG. 3, and FIG. 5 corresponds to FIG. 4 showing another embodiment of the elevator door safety device according to the present invention. 6 is a right side view of FIG. 5.

3... Sliding door, 4... Drive motor, 5
...Transmission mechanism, 6...Safety device, 7.
...First member, 8...Second member, 8b, 8k
...Holding force mechanism when the door is open, 8c, 8i...Holding force mechanism when the door is open, 9...Holding device, 10...
・Door closed abnormality detection device, 11...Door open abnormality detection device.

In addition, the same parts or corresponding parts in the figures are indicated by the same reference numerals. Figure 1 Figure 2 Figure 3 Figure 5 Figure 6 Figure 4

Claims (1)

[Claims] 1. In a device that opens and closes a sliding door by a driving electric motor via a transmission mechanism, a first member and a second member that form part of the transmission mechanism and are engaged with each other so as to be relatively displaceable, and a normal door opening of the sliding door. The relative position of both the first member and the second member is maintained at a predetermined position, and when an abnormal load is applied to the sliding door when the door is opened, the door closing force is applied via the door opening holding force mechanism. When an abnormal load is applied to the sliding door when the door is closed, a holding device is provided which causes the above two to be abnormally displaced when the door is opened and when the door is closed via a holding force mechanism when the door is closed, and the above-mentioned both are abnormally displaced when the door is opened. A door open abnormality detection device that operates, and a door closed abnormality detection device that is provided separately from the door open abnormality detection device and that operates based on abnormal displacement of both of the above when the door is closed, the door open abnormality detection device and the door closed A safety device for an elevator door, characterized in that the drive motor is controlled by one of the operations of an abnormality detection device.