JPH10139332A - Safety device for elevator door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a passenger from being held between a car door and a front column when the door is opened. SOLUTION: In a car door 2 provided at an elevator car entrance and opened and closed automatically at a landing floor designated by a hall call or car call of a passenger, at a specified range of front colums 3a, 3b erected at the right and left of the car door 2, opto-electric units 4, 5 composed of a light protector 4 and a light receiptor 5 and a door open blocking unit C for blocking the door opening command when an optical input to at least one of the units 4, 5 is shielded are provided, and switches for changing over the contents of alarming information of an alarm unit 7 according to the operation of the units 4, 5 and the open and close conditions of the car door 2.

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 an elevator door, and more particularly, to a safety device for an elevator door suitable for preventing an accident that a passenger gets caught between a car door and a front pillar.

[0002]

2. Description of the Related Art Conventionally, in order to prevent a passenger of an elevator from intentionally or unintentionally leaning on a car door and hindering the opening / closing operation of the door, Japanese Utility Model Laid-Open No. 5-12470 discloses an elevator. The first slidably provided
And a second panel provided near the front side of the first panel, the second panel being capable of following the panel. A switch that operates when the side end is pressed is provided at the side end of the
An elevator door safety device provided with a warning device that issues a warning in accordance with the operation of the switch has been proposed.

[0003]

By the way, in the above-mentioned prior art, a warning device issues a warning by operating a switch provided at a side end portion of the second panel of the car door on the advancing side, and the door closing operation is performed. It is designed to prevent hindering passengers from mischievous behavior, and is not designed to restrict the opening operation of the door when the passenger leans on the door when the door is opened. There was a problem that prevention of being sandwiched between front pillars and the like was not considered.

Further, in the above prior art, since a switch is provided at a side end of a door that opens and closes, there is a problem that a wire to the switch is hooked when the door is opened and closed, and a wire is broken due to repeated opening and closing. Was.

It is an object of the present invention to provide an elevator door safety device which prevents passengers from being caught in the car door and the front pillar when the car door is opened.

[0006]

In order to achieve the above object, the present invention provides a car door provided at an elevator doorway of an elevator, which automatically opens and closes on an arrival floor according to a passenger's hall call or car call. A photoelectric device comprising a light projecting unit and a light receiving unit disposed at predetermined intervals in a predetermined range of a front pillar standing upright on the left and right of the car door, and a light input of at least one light receiving unit of the photoelectric device; And a door opening preventing device for preventing a door opening command when the door is shut off.

[0007] With this configuration, for example, when a car of an elevator arrives at a predetermined floor and the door opens, if a passenger leans on the car door, the passenger is placed on the front pillar standing upright on the left and right sides of the car door. The installed photoelectric device operates and issues a warning in advance by the warning device provided in the car,
Since the opening operation of the car door is restricted, it is possible to prevent a passenger from being caught between the car door and the front pillar.

Further, the photoelectric device is provided on a front column which is a fixed portion and is provided upright on the left and right sides of the car door, and the electric wire for the wiring to the photoelectric device is not broken by opening and closing the car door.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a car doorway showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of the car for supplementary explanation of FIG. 1, and FIG. It is a control circuit diagram of the safety device of the elevator door of one embodiment.

1 and 2, a car door 2 of a car 1 of an elevator is composed of a right door panel 2a and a left door panel 2b which open and close in an interlocked manner in the left and right directions. A right front pillar 3a is provided near the left door panel 2b, and a left front pillar 3b of the car 1 is erected so as to face left and right. Further, on a surface of the right front column 3a facing the left front column 3b near the right door panel 2a, a plurality of light emitting units 4 of the photoelectric device including the light emitting unit 4 and the light receiving unit 5 are provided at a predetermined interval in a predetermined range. The same number of light receiving units 5 of the photoelectric device are arranged at a position facing the light projecting unit 4 on the left front column 3b facing the right front column 3a, and at least one light input from the light projecting unit 4 is provided. When more than one light is shielded, the light receiving section 5 is configured to output a light shielding detection signal.

The operation panel 6 of the car 1 has a light receiving section 5
For example, a warning device 7 that issues a warning by voice when the light-shielding detection signal is output is provided. Further, the door panel 2 is provided at the floor entrance end of the car 1 when the door is opened and closed.
A threshold 8 for guiding a and 2b is provided.

In FIG. 3, between a power source PN, a contact Aa1 which closes upon detecting that the elevator car 1 is stopped at a position where the door can be opened and closed, and a light input from a light projecting unit 4 are provided. A light receiving section 5 that outputs a light-shielding detection signal when at least one light is shielded, and a light-shielding detection relay C having a normally open contact Ca1 and a normally closed contact Cb1 are connected in series. Similarly, a normally-closed contact Cb1 between the power supplies PN and a door-closing operation preparation command (not shown) that becomes a door-closing operation preparation command when energized and a door-opening operation preparation command when deactivated. A contact Bb1, a normally-closed contact OLb1 of a door open-end detection relay OL (not shown) which is energized by detecting that the car door 2 is completely opened at an open end of the car door 2, and a normally-open contact Da
1 is connected in series, and the normally-closed contact Cb1 of the light-shielding detection relay C is connected in parallel with the normally-open contact Da1 of the door-opening command relay D. Further, the normally open contact C of the light shielding detection relay C is connected in series from the power supply P.
a1, a normally open contact Ba1 of a door open / close preparation relay B, and a normally open contact Ca1 of a light shielding detection relay C which are connected to a warning content control terminal 7a of a warning device 7 via a normally closed contact OLb2 of a door open end detection relay OL. From the connection point of the normally open contact Ba1 of the door opening / closing preparation relay B to the normally closed contact Bb2 of the door opening / closing preparation relay B and the car door 2 at the door closed end of the car door 2.
The normally open contact CLa1 of the door closed end detection relay CL (not shown) that detects and urges the
Are connected in series to the warning content control terminal 7n, and the ground terminal 7G of the warning device 7 and the power supply N are connected.

Next, the operation of one embodiment of the present invention will be described.

For example, if a passenger (not shown) is leaning on the car door 2 when the elevator arrives at the stop floor in response to the call, the light from the light projecting unit 4 of the photoelectric device is blocked by the light receiving unit. 5, a light-blocking detection signal is output, and a power supply P-contact Aa1-light-receiving unit 5-light-blocking relay C
A circuit for the power supply N is formed, and the light-shielding detection relay C is energized. The normally-closed contact Cb1
Is opened, the circuit of the power supply P-normally-closed contact Cb1-normally-closed contact Bb1-normally-closed contact OLb2-door open command relay D-power supply N is kept open, and the door open command relay D is de-energized. The car door 2 remains closed.
At the same time, the normally open contact Ca1 of the light-shielding detection relay C is closed, so that the warning device 7 is connected to the power supply P, the normally open contact Ca1, the normally closed contact Bb2, the normally open contact CLa1, the terminal 7n, the terminal 7G, and the power supply N. Power is supplied and the warning content control terminal 7n
For example, a voice guidance of "The door opens. If you are leaning on the door, please move away from the door." When the passenger moves away from the door according to the guidance broadcast, the light receiving unit 5 has a light emitting unit 4.
, The light-blocking detection signal is lost, the light-blocking detection relay C is deactivated, the normally closed contact Cb1 is closed, the power supply P-normally closed contact Cb1-normally closed contact Bb1-normally closed contact OLb1-door open. The command relay D-power supply N circuit activates the door open command relay D and the door starts to open. At this time, since the normally open contact Da1 of the door open command relay D is closed, the door open command is made by the circuit of the power source P-normally open contact Da1-normally closed contact Bb1-normally closed contact OLb1-door open command relay D-power source N. The relay D is self-maintained until the car door 2 is completely opened and the normally closed contact OLb1 of the door open end detection relay OL is opened.
When a passenger enters or exits during the door opening operation, the door opening operation is not interrupted even if the light from the light emitting unit 4 of the photoelectric device is blocked. At the same time, when the door starts to open, the normally open contact CLa1 of the door closed end detection relay CL is opened.
Even if a passenger enters and exits during the door opening operation and the light from the light emitting unit 4 of the photoelectric device is blocked, the power supply P-normally open contact Ca1-normally closed contact Bb2-normally open contact CLa1-terminal 7n-terminal 7G.
-Since the circuit of the power supply N is not formed, unnecessary warning broadcast is not performed.

Next, when the car door 2 is opened, and after a predetermined time, for example, 5 seconds, the door opening / closing preparation relay B is energized and the normally open contact Ba1 is closed, a passenger (not shown) receives the car door 2
When the light from the light projecting unit 4 of the photoelectric device is shielded in the vicinity of the power source P, the normally open contact Ca1 is closed by the energization of the light shielding detection relay C, as described above. Normally open contact Ba1-normally closed contact OLb2-terminal 7a-terminal 7G
A circuit of the power supply N is formed, and a warning content corresponding to the warning content control terminal 7a, for example, a voice content of "The door closes. Please be careful with the door closed." Is broadcast to the car 1.

This prevents the passenger from being caught between the car door 2 and the front pillars 3a and 3b when the door is opened and closed.

In the present embodiment, the description has been made of the car door 2 which opens and closes left and right, but the same applies to the car door which opens and closes one of the left and right sides, so the description is omitted.

[0019]

Since the present invention is constructed as described above, it effectively alerts the passenger when the door is opened and closed. Particularly, when the door is opened and the passenger leans on the car door, the door and front door are likely to be generated. It is possible to prevent a passenger from being trapped in a pillar or the like. In addition, the photoelectric device that detects the leaning of the passenger on the car door is disposed on the front pillar standing upright on the left and right sides of the car door, thereby preventing disconnection of wiring to the photoelectric device due to opening and closing operation of the car door. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view of a car entrance / exit section showing one embodiment of the present invention.

FIG. 2 is a cross-sectional view of a car.

FIG. 3 is a control circuit diagram of an elevator door safety device according to an embodiment of the present invention.

[Explanation of symbols]

 2a, 2b Car door 3a, 3b Car front pillar 4 Light emitting part 5 Light receiving part 7 Warning device B Door opening / closing preparation relay C Light blocking detection relay D Door open command relay OL Door open end detection relay CL Door closed end detection relay

Claims (3)

[Claims] 1. A car door which is provided at a car entrance of an elevator and automatically opens and closes on an arrival floor according to a passenger's hall call, a car call, etc., in a predetermined range of a front pillar standing on the left and right of the car door. A photoelectric device comprising a light projecting portion and a light receiving portion disposed at a predetermined interval, and a door opening preventing device for blocking a door opening command when light input to at least one light receiving portion of the photoelectric device is cut off A safety device for an elevator door, comprising: 2. The safety device for an elevator door according to claim 1, further comprising a switching device for switching the warning content of the warning device depending on the operation of the photoelectric device and the open / close state of the car door. 3. The safety device for an elevator door according to claim 1, wherein the photoelectric device is operable at least when the elevator car is stopped at a door openable position.