JP2005096899A - Safety device for elevator door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a door from colliding with an obstacle in a doorway of an elevator. <P>SOLUTION: A projector 4 is provided under the doorway pillar of a car and a receiver 6 is provided at an upper board 2 of the car, and the beam light is passed between them. When the beam 5 is blocked off by an obstacle such as a human body or the like, existence of the obstacle is detected. When the existence of the obstacle is detected before the door 3 of the car starts to close, the door 3 of the car is blocked. At the same time, an announcing device 7 announces that passengers move away from the door 3 of the car. When the device does not detect the obstacle, the door 3 of the car normally closes. When it detects the obstacle, the alarm for closing door is announced and the door 3 of the car is closed at low speed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a safety device that detects an obstacle at an elevator car or a hallway entrance and controls the operation of a door.

  In a conventional elevator door safety device, in an elevator provided with an electric door device at the doorway, a light projecting device that projects light across the space of the doorway, and a projector that is disposed opposite to the light projecting device. A light receiving device that operates by being irradiated by an optical device, and is configured to control the electric door device through the operation of the light receiving device (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 53-49868 (claims for utility model registration, Fig. 1 and Fig. 2)

  In the conventional elevator door safety apparatus as described above, since light is projected across the entrance / exit space, it is possible to prevent passengers in the vicinity of the door from being caught by the door during the door closing operation. Before door start and during door closing operation, the door collides with an obstacle existing in the vicinity of the car doorway pillar or the car door, or near the landing three-way frame or landing door, or an obstacle due to unexpected door reversal operation There is a problem that it is not sufficient to prevent the pulling-in.

  The present invention has been made to solve the above-described problems, and can prevent a door from colliding with an obstacle existing in the vicinity of an entrance / exit and an obstacle etc. being pulled in by an unexpected door reversing operation. An object of the present invention is to provide an elevator door safety device.

  The safety device for an elevator door according to the present invention is provided with a projector at the lower part of the entrance / exit column of the car, a light receiver at the upper part of the entrance / exit, and detects the presence / absence of an obstacle by the beam light transmitted between the two, When the presence of an obstacle is detected before the car door is closed, the start of the car door is stopped and the passenger is announced to leave the car door.

  In the present invention, when the presence of an obstacle is detected before the door is closed, the door closing operation of the car door is prevented and the passenger is announced to leave the car door. It is possible to prevent the car door from colliding with an obstacle such as a human body existing in the vicinity of the door.

Embodiment 1 FIG.
1 to 3 are diagrams showing an embodiment of the first to third inventions of the present invention. FIG. 1 is an overall configuration diagram (a front view of an entrance as seen from a car room), and FIG. FIG. 3 is an operation flowchart (after the start of the door closing operation).
In FIG. 1, a car doorway column 1 is erected on both sides of the car room doorway, and a car upper plate 2 is laterally provided on the upper side, and a car door 3 is provided. A projector 4 is installed below the car entrance / exit column 1, and a light receiver 6 (boarding detection sensor) that receives the beam light 5 projected from the projector 3 is installed on the car upper plate 2. An announcement device 7 is installed in the car room.

  The elevator control device 8 and the door control device 9 are connected by a communication line 10, and the elevator control device 8 outputs a door opening command signal 8 a and a door closing command signal 8 b to the door control device 9. The elevator control device 8 and the door control device 9 are equipped with a CPU for executing control calculations for the elevator and the door, and include a ROM for storing CPU calculation programs, a RAM for storing CPU calculation data, and an input / output interface. Although it is provided, since it is a well-known technique, a detailed description is omitted.

The elevator control device 8 controls the hoisting motor (not shown) to raise and lower the car. The door control device 9 controls the opening / closing of the car door 3 by controlling a car door driving motor (not shown) according to the door opening command signal 8a and the door closing command signal 8b output from the elevator control device 8.
The light beam 5 projected from the light projector 4 is always received by the light receiver 6, but when an obstacle such as a human body exists near the entrance / exit post 1 or the car door 3, the light beam 5 is blocked. The operation detection signal is output and taken into the elevator control device 8 via the communication line 10.

  The announcement message notification signal is taken into the door control device 9 via the communication line 10. The elevator control device 8 controls the announcement message notification signal, the door opening command signal 8a, and the door closing command signal 8b according to the state of the door control device 9 taken in via the communication line 10, thereby 3 is controlled to open and close. The door control device 9 controls the announcement device 7 based on the announcement message notification signal taken in via the communication line 10 and issues an appropriate message to passengers in the car.

Next, the operation of this embodiment will be described with reference to FIGS.
(1) Before start of door closing operation (Fig. 2)
In step S1, before starting the door closing, it is determined whether the boarding detection sensor is operating, in other words, the presence of an obstacle is detected. If it determines with this boarding detection sensor not operating, it will fly to Step S7 and will close car door 3 normally.

  If it is determined that the boarding detection sensor is operating, the process proceeds to step S2 to prevent the door closing operation, and from the announcement device 7, for example, “The door is closed.” “Please leave the door.” Issue a message. In step S3, at the end of the caution announcement before door closing in step S2, it is determined again whether the boarding detection sensor is operating. If not, the door is normally closed in step S7. When the operation of the boarding detection sensor continues, the process proceeds to step S4, and a message such as “door closes” is issued.

  In step S5, the process waits for the door closing warning announcement in step S4 to end. When the announcement ends, the process proceeds to step S6, where a door closing warning sound, for example, “boo boo boo ...” is announced, and the door closing operation is started. At this time, the door closing speed is lower than usual. When the car door 3 is fully closed, the warning sound stops. Here, steps S1 and S2 constitute door closing prevention means and first alarm means, and steps S3 to S7 constitute first door closing restriction means.

  In this way, when the boarding detection sensor is operating before the door is closed, a caution announcement is issued, so that an obstacle such as a human body in the vicinity of the doorway pillar 1 or the car door 3 3 can be prevented from colliding with each other. Further, if the operation of the boarding detection sensor is continued, the door closing speed is lowered and the door closing operation is performed together with the door closing warning sound, so that it is possible to prevent the operation efficiency from being lowered as much as possible.

(2) After the door closing operation starts (Fig. 3)
In step S11, it is determined whether the boarding detection sensor is operating after the door closing operation is started on the stop floor. If it is determined that the boarding detection sensor is not operating, the car door 3 is normally closed in step S13.
If it determines with a boarding detection sensor operating, it will progress to Step S12 and will stop the car door 3. This can be realized by not outputting both the door opening command signal 8a and the door closing command signal 8b from the elevator control device 8. After a predetermined time (3 seconds in this embodiment) elapses, the door closing speed is changed from the normal speed to a low speed, and a door closing warning announcement, for example, “PPP ...” is issued until the door is fully closed.

Here, steps S11 and S12 constitute second door closing limiting means, and step S12 constitutes second alarm means.
In this way, when the boarding detection sensor operates after the start of door closing, the door closing is stopped, and after a predetermined time, the door closing warning is sounded and the door closing operation is started at a low speed. It is possible to prevent an obstacle such as a human body from being drawn into the gap between the doorway pillar 1 and the car door 3 due to an unexpected door reversal operation caused by the above.

Embodiment 2. FIG.
In this embodiment, the configuration of the first embodiment is applied to a landing entrance.
That is, it can be realized by replacing the car doorway pillar 1 and the car upper plate 2 with a landing three-way frame installed at the landing doorway, and replacing the car door 3 with the landing door, and has the same effect as the first embodiment. Can be expected.

1 is an overall configuration diagram showing Embodiment 1 of the present invention. The operation | movement flowchart (before door-closing operation | movement start) which shows Embodiment 1 of this invention. The operation | movement flowchart (after a door closing operation start) which shows Embodiment 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car entrance / exit pillar, 2 Car top plate, 3 Car door, 4 Light projector, 5 Beam light, 6 Light receiver, 7 Announcement device, 8 Elevator control device, 8a Door open command signal, 8b Door close command signal, 9 Door control device .
S1, S2 Door closing prevention means and first alarm means, S3-S7 first door closing restriction means, S11, S12 second door closing restriction means, S12 second alarm means.

Claims (4)

  A projector for transmitting the beam light along the entrance / exit column is provided at the lower part of the entrance / exit column of the car, and a receiver for receiving the beam light is provided at the upper part of the entrance / exit, and if the beam light is transmitted, In the device that detects the absence, detects the presence of the obstacle when the light beam is interrupted, and controls the operation of the car door that opens and closes the doorway, the obstacle before the door starts to be closed. When the presence of an object is detected, a door closing prevention means for preventing the start of the door closing operation of the car door, and a first alarm for announcing the passenger to leave the car door when the door closing prevention means operates. And a safety device for an elevator door.   When the presence of an obstacle is detected at the end of the announcement, the door is normally closed, and if the obstacle continues, the first door closing limiting means is provided to close the door at a low speed. The elevator door safety device according to claim 1, characterized in that:   A second door closing limiting means for stopping the car door when the presence of an obstacle is detected after the start of the door closing, and shifting to a door closing operation at a low speed after a predetermined time has elapsed; and the second door closing limiting means 3. The elevator door safety device according to claim 2, further comprising: a second alarm means for issuing a door closing warning sound until the car door is fully closed during the door closing operation.   The elevator door safety device according to any one of claims 1 to 3, wherein a car doorway column and an upper part of the doorway are replaced with a landing three-way frame, and the car door is replaced with a landing door.

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