JP2002053281A - Door closing safety device for elevator door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate malfunctions such as severance of an electric cable due to a constitution of a mechanical safety shoe and a microswitch of an elevator door. SOLUTION: A reflector device 10 is provided fixed to the safety shoe 1 attached to the car door 3 of an elevator car 9. An optical light ray device 11 projecting light on optical axis reflectors 17 and 17 and receiving light is provided on a fixing part 9 facing the car door 3. An optical path 30 is formed where light irradiated from a projector 20 of the optical light ray device 11 is reflected by the optical axis reflectors 17 and 17 and made incident on a photodetector 21, and reversal of the car door 3 for reopening it is performed by intercepting this optical path 30. When the safety shoe 1 is operated without interception of the optical path 30, a shielding plate 29 fixed to the car door 3 is moved into the reflector device 10 to intercept the optical path 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for closing a door of an elevator door, and more particularly, to automatically reversing a door opening / closing operation for closing the door after the door is opened by irradiating a light to a safety shoe of a car door and blocking an optical path thereof. The present invention relates to a door-closing safety device which is designed to open the car door again.

[0002]

2. Description of the Related Art There are two types of elevator doors, a hold door provided in a hall on each floor and a car door provided in a car.
When the car arrives at the designated floor, the locker is unlocked and opened in conjunction with the opening of the car door by the door opening / closing device of the car, and when the car door is closed, the hold door is released by the force of the weapon. Automatically closes and locks.

[0003] In the operation of closing the car door from the open state, if a person trying to get out of the car attempts to stop the car door, a safety shoe provided on the car door operates and a switch interlocked with the safety shoe operates. When activated, the door opening / closing device is inverted, so that a door closing safety device is provided so that the car door can be opened again.

Conventionally, it has been considered as a standard idea that this door closing safety device is constituted by a mechanical safety shoe 1 and a micro switch 2 as shown in FIG. That is, the safety shoe 1
A boot 4 parallel to the distal end of the car door 3 is supported by the car door 3 so as to be able to move in parallel by links 5 and 5, and one link 5 is formed by extending an extension 5a from a shaft attachment portion thereof.
The microswitch 2 has an operating piece 2a operable in contact with the extension 5a and is fixed to the car door 3. An electric cable 6 is connected to the microswitch 2, and the electric cable 6 is connected to the ceiling of the car. It is arranged hanging from the part.

Therefore, when a person comes into contact with the boot 4 or a door or a fixed portion facing the car door 3 and the boot 4 moves upward through the links 5, 5, the rotation of the link 5 causes the microscopic movement. The open or closed state in which the operating piece 2a of the switch 2 is pushed by the extension 5a to operate is picked up as an electric signal, and this is input to the control unit of the door opening / closing device via the electric cable 6, whereby the control unit is controlled. Turns the drive unit of the door opening / closing device to invert to open the car door 3 again.

[0006]

However, in the structure of the mechanical safety shoe 1 and the microswitch 2, the electric cable 6 is disposed on the movable car door 3, so that the electric cable 6 is inevitably fixed. And the movable part, for example, disconnection or grounding may occur between the fixed part and the movable part of the electric cable stopper, and pinch disconnection, pinch short-circuit, and generation of abnormal noise due to contact And deterioration are likely to occur.

Therefore, it is necessary to always check the electric cable for damage at the time of inspection around the door.
It is necessary to replace electric cables and micro switches in a timely manner. However, the replacement of the electric cable 6 requires at least two workers to ensure safety, and the time required for the operation is not short at present.

Further, when the window glass 7 is fitted into the elevator door, the electric cable 6 hangs down and swings, and when it is not a uniform wiring state, it can be seen from a car or a passenger in the hall. Therefore, the appearance is not good.

In view of the above circumstances, the present invention is intended to eliminate the problem of the electric cable 6 due to the configuration of the mechanical safety shoe 1 and the microswitch 2.

[0010]

According to a first aspect of the present invention, there is provided a safety device for closing a door of an elevator door, wherein a reflecting mirror device is fixedly provided on a safety shoe mounted on the elevator door. An optical axis light ray device for projecting and receiving light on the optical axis reflecting mirror is provided on a fixed portion facing the door, and light emitted from a light emitting device of the optical axis light ray device is reflected by the optical axis reflecting mirror to receive light. An optical path is formed to be incident on the door, and the reversal for restarting the door is performed by blocking the optical path.

Therefore, the light emitted from the light emitter of the fixed part facing the car door which opens and closes is reflected by the optical axis reflecting mirror of the reflecting mirror device and is incident on the light receiver of the fixed part to form an optical path, When this light path is interrupted, the drive of the door opening / closing device is reversed, and the car door which is about to be closed is automatically reopened.

According to a second aspect of the present invention, the reflecting mirror device is fixedly provided on the safety shoe mounted on the elevator door, and the optical axis light ray device for projecting and receiving light on the optical axis reflecting mirror is provided. In addition to being provided on the fixed portion facing the door, the reflecting mirror device is provided with a shielding plate for blocking the optical path between the optical axis reflecting mirrors by the movement of the safety shoe, and the light emitted from the projector of the optical axis light ray device is transmitted along the optical axis. Forming an optical path that is reflected by the reflecting mirror and incident on the light receiver, by turning off the optical path, reversing the door for restarting, and when the safety shoe operates without interrupting the optical path, The reversal for restarting the door is performed by blocking the light path by the shielding plate.

Therefore, if the safety shoe moves upward without interrupting the optical path, the shield plate interrupts the optical path, so that the drive of the door opening / closing device is reversed, and the car door which attempts to close automatically re-opens. Since the door is opened, safety when opening and closing the door can be secured.

According to a third aspect of the present invention, in the reflecting mirror device, the both ends of a holding frame having a predetermined length in which a long hole is formed along a longitudinal direction are bent at a predetermined angle in the same direction. A reflector holding portion of a required length is formed, and a slit is formed in the reflector holding portion in the longitudinal direction, and an optical axis reflecting mirror is mounted on a rectangular substrate having a screw engaged with the slit fixed at a central portion. It is characterized by being fixed. Therefore, the size of the reflecting mirror device can be reduced, the setting and adjustment of the optical axis reflecting mirror can be performed, and a highly accurate optical path can be formed.

Further, as set forth in claim 4, the reflecting mirror device is housed and fixed in a boot of the safety shoe, and the boot has a window hole corresponding to the optical axis reflecting mirror. It is characterized by. Therefore, it is possible to prevent the reflection mirror device from being housed in the boot without being exposed, thereby reducing the appearance.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a reflector device 10 is fixedly attached to a boot 4 of a safety shoe 1 of a car door 3 of an elevator car 8, while the reflector device 10 faces the reflector device 10 on the card entrance side. The optical axis light ray device 11 is fixed and attached to the fixing portion 9 of the optical disk.

As shown in FIG. 3, the reflecting mirror device 10 is provided with a reflecting mirror holding portion 13 having a required length bent at 135 degrees outwardly at both ends of a holding frame 12 of a predetermined length made of a channel material. Are formed in the reflector holding portion 13.
4 are formed in the longitudinal direction, and an optical axis reflecting mirror 17 is attached and fixed to a rectangular substrate 16 in which a screw 15 engaged with the slit 14 and fixed with a washer 18 and a nut 19 is fixed at the center. Become. A long hole 12a is formed in the holding frame 12 along the longitudinal direction.

The upper optical axis reflecting mirror 17 in FIG.
Is directly affixed to the reflecting mirror holding unit 13, but may be provided so as to be adjustable in position similarly to the lower optical axis reflecting mirror 17 as shown in FIG. As shown in FIG. 4, in order to make the angle of the optical axis reflecting mirror 17 adjustable, a rectangular substrate 16 having a screw 15 fixed at the center is rotatably supported on the holding frame 12 by a hinge 32, and a slit is provided. A screw 15 is engaged with 14 and fixed with a washer 18 and a nut 19, and a coil spring 33 is interposed between the substrate 16 and the reflecting mirror holder 13 to adjust the angle between the substrate 16 and the reflecting mirror holder 13. Then, the reflection adjustment of the optical path 30 may be performed.

As shown in FIG. 5, the reflecting mirror device 10 has a screw hole 4b formed on the opening side of the boot 4 together with screw holes 12b formed on both side walls of the holding frame 12 at predetermined intervals.
b is fixed with screws 31 in the boot 4 and the boot 4 has window holes 4a, 4a corresponding to the optical axis reflecting mirrors 17, 17, respectively.
Is established.

The optical axis light ray device 11 comprises a light projector 20 and a light receiver 21, both of which are fixedly arranged facing the optical axis reflecting mirrors 17, 17. If necessary, two light receivers 21 may be arranged vertically or side by side to improve the light reception rate, and it is preferable to prevent the light receiver 21 from receiving light even by a slight movement of the movable car door 3. The floodlight 20 is located at the top,
Although 1 is arranged in the lower stage, the arrangement may be reversed. Since the optical axis light ray device 11 does not have a movable structure, the electric cable 22 connecting the light axis light ray device 11 and the door opening / closing device can be fixedly disposed on the fixing portion 9, so that there is no fear of damage such as disconnection.

On the other hand, as shown in FIG. 6, the car door 3 is provided with an optical axis cut bar device 23. This cut bar device 23 is provided with a coil spring 2 on a substrate 24 having a U-shaped cross section.
5, a bar 26 protruding toward one end is slidably supported. Slots 27, 27 in the horizontal direction are formed in the substrate 24 in two upper and lower stages, and screws 2 are formed in the slots 27, 27.
8, 28, etc. are inserted and fixed to the car door 3 so that the position can be adjusted. The tip of the bar 26 is the long hole 1 of the holding frame 12.
A flat shielding plate 29 that can be inserted into 2a is formed. This shielding plate 28 is used for the optical path 3 of the optical axis reflecting mirrors 17 and 17.
0 can be blocked.

Therefore, the optical axis emitted from the projector 20 is incident on the optical axis reflecting mirror 17 in the upper stage, and the optical axis reflecting mirror 1
7, the light is reflected by the lower optical axis reflecting mirror 17 and is reflected by the lower reflecting optical axis 17 to be incident on the light receiver 21. Therefore, the light projector 20, the optical axis reflecting mirrors 17, 17 and the light receiver 21
When the optical path 30 is cut off, the door closing operation of the door opening / closing device is reversed, and the car door 3 is restarted.

In this state, if the passenger in the car tries to get off and cuts off the optical path 30, the car door 3 restarts. Also,
When the passenger contacts the boot 4 without interrupting the light path 30, the boot 4 is pushed and rises via the links 5 and 5, and the shielding plate 28 of the cut bar device 23 is
, The optical path 30 is cut off, the door closing operation of the door opening / closing device is reversed, and the car door 3 is restarted.

When the car door 3 moves toward the fixed portion 9 and closes the door after a certain period of time without interruption of the optical path 30, the car door closing operation is reversed and the opening operation is possible. Can be switched to

[0025]

According to the present invention described above, the reflecting mirror device is fixedly provided on the elevator door, while the optical axis light ray device is provided on the fixing portion facing the door.
The electric cable only needs to be provided in the fixed part, and the installation of the electric cable in the door can be omitted, so that the electric cable associated with the movement of the elevator door is not obstructed. Need to be performed frequently.

Further, since the electric cable is provided in the fixed portion, the appearance of the electric cable from the elevator door having the glass window can be reduced.

Further, the light emitted from the projector of the optical axis light ray device is reflected by the optical axis reflecting mirror to form an optical path to be incident on the light receiver, and the elevator path is restarted by interrupting the optical path. Since the door is restarted without physically touching the safety shoe, safety is improved.

When the safety shoe operates without interrupting the optical path, the shielding plate interrupts the optical path, so that the same operation as that of the conventional microswitch can be performed.

[Brief description of the drawings]

FIG. 1 is a perspective view from the hole side showing a state in which a car door according to an embodiment of the present invention is opened.

FIG. 2 is a schematic view showing a main part of the present invention.

FIG. 3 is a perspective view showing a reflecting mirror device according to the present invention.

FIG. 4 is a perspective view showing another example of the reflecting mirror device according to the present invention.

FIG. 5 is a perspective view showing an example of a reflecting mirror device housed and installed in a boot.

FIG. 6 is a front view of a cut bar device that shuts off an optical axis when a safety shoe operates.

FIG. 7 is a rear view showing a conventional car door.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Safety shoe 3 ... Car door 4 ... Boot 4a ... Window hole 8 ... Elevator car 9 ... Fixed part 10 ... Reflective mirror device 11 ... Optical axis light ray device 12 ... Holding frame 12a ... Long hole 13 ... Reflective mirror holding part 14 ... Slit DESCRIPTION OF SYMBOLS 15 ... Screw 16 ... Substrate 17 ... Optical axis reflection mirror 20 ... Projector 21 ... Light receiver 22 ... Electric cable 23 ... Optical axis cut bar device 24 ... Substrate 25 ... Spring 26 ... Bar 27 ... Slot 28 ... Screw 29 ... Shielding plate 30 Optical path 31 Hinge

Continued on the front page (72) Inventor Masaomi Uchida 2-4-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Shinjuku NS Building Nippon Otis Elevator Co., Ltd. (72) Inventor Yoshihiro Tanigawa 2-4-2 Nishishinjuku, Shinjuku-ku, Tokyo No. 1 Shinjuku NS Building Japan Otis Elevator Co., Ltd. (72) Inventor Noboru Takayanagi 2-4-1 Nishi Shinjuku, Shinjuku-ku, Tokyo Shinjuku NS Building Japan Otis Elevator Co., Ltd. (72) Inventor Hideki Sakai Tokyo 2-4-1 Shinjuku, Shinjuku-ku Shinjuku NS Building Japan Otis Elevator Co., Ltd. F-term (reference) 3F307 AA02 DA03 DA13

Claims (4)

[Claims] 1. A fixing unit for fixing a reflecting mirror device to a safety shoe mounted on an elevator door, and an optical axis light ray device for projecting and receiving light on the optical axis reflecting mirror facing the door. The light emitted from the projector of the optical axis light ray device is reflected by the optical axis reflecting mirror to form an optical path to be incident on the light receiver, and by blocking this optical path, the door is inverted for restarting. A door closing safety device for an elevator door, characterized in that: 2. A fixing part for fixing a reflecting mirror device to a safety shoe mounted on an elevator door, and an optical axis light ray device for projecting and receiving light on the optical axis reflecting mirror facing the door. In addition to the above, the reflecting mirror device is provided with a shielding plate for blocking the optical path between the optical axis reflecting mirrors by the movement of the safety shoe, and the light emitted from the projector of the optical axis light ray device is reflected by the optical axis reflecting mirror. An optical path incident on the light receiver is formed, and the interruption of the optical path causes reversal for reopening the door. Also, when the safety shoe operates without interrupting the optical path, the shielding plate interrupts the optical path. A door closing safety device for an elevator door, characterized in that the door is reversed for reopening the door. 3. A reflecting mirror device according to claim 1, wherein said holding frame having a required length bent at a predetermined angle in the same direction is provided at both ends of a holding frame having a predetermined length in which a long hole is formed along the longitudinal direction. A slit is formed in the reflecting mirror holding portion in the longitudinal direction, and an optical axis reflecting mirror is fixed to a rectangular substrate in which a screw engaging with the slit is fixed at a central portion. The safety device for closing an elevator door according to claim 1 or 2. 4. The reflecting mirror device is housed and fixed in a boot in a safety shoe, and the boot has a window hole corresponding to the optical axis reflecting mirror. Or the safety device for closing an elevator door according to 3.