JPH0859153A - Car door locking device of elevator - Google Patents

Abstract

PURPOSE: To provide a car door locking device of an elevator capable of trans mitting the alarm signal to promote the stop of mischievous actions by passengers when an engagement body is brought into contact with a hook part of a car door locking device due to the mischievous action, and capable of informing the number of contact times of the engagement body with the hook part to a monitoring center. CONSTITUTION: A detecting means to detect the contact of hook parts 4a, 5a of a car door locking device 1 with an engagement body 6, and a judging means to judge an abnormality of the car door locking device 1 by detecting that the time of detection of the detecting means exceeds the preset value are provided, and an informing means 21 gives the alarm signal based on the result of the judgement of the judging means. The number of contact times of the hook parts 4a, 5a with the engagement body 6 is informed to a monitoring center 26 by informing means 25, 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator car door lock device.

[0002]

2. Description of the Related Art For example, in an elevator delivered to a multi-tenant building, when a drunken person tries to pry open the car door while the car is running, or in an elevator delivered at a school, a student tries to pry the car door. There is an accident in which the passengers are trapped in the car due to the sudden stop of the car. There is also concern about accidents in which passengers trapped in a car fall from an open doorway.

Therefore, conventionally, for example, Japanese Unexamined Patent Publication No. 62-1913.
As described in Japanese Patent Publication No. 89, a hook portion provided on a hanging metal fitting suspended on a car, and an engagement body provided on a rail frame that movably supports the hanging metal fitting and engageable with the hook portion. And an elevator car door locking device including an electromagnetic coil for driving the engagement body. In this car door locking device, when the car door is closed and the car is traveling, the engaging body is engaged with the hook portion by the driving of the electromagnetic coil, whereby the car door is locked in the closed state. There is. Then, when the car stops, the engaging body returns to the initial position by the demagnetization of the electromagnetic coil, and the engagement with the hook portion is released, whereby the car door can be opened.

During operation of such a car door locking device, when a passenger tries to pry open the car door due to mischief or the like, the hook portion moves in the opening direction of the car door and comes into contact with the engaging body. Prevents the car door from trying to move in the opening direction.

[0005]

By the way, in the above-mentioned prior art, when the car door lock device is operated, the operation of prying the car door due to the mischief of the passenger is repeatedly performed.
Since the hook portion of the car door locking device and the engaging body are repeatedly contacted with each other, the engagement position between the hook portion and the engaging body is displaced and the opening and closing of the car door is hindered, and the hook portion or the engaging body is broken. There was a problem such as causing. In addition, since the number of times the hook portion of the car door lock device is in contact with the engaging body cannot be grasped, a site with a high frequency of contact between the hook portion and the engaging body is determined during a certain inspection interval of the car door locking device. In the above, there was a problem of overlooking the abnormality of the car door lock device.

The present invention has been made in view of the above-mentioned circumstances in the prior art, and an object of the present invention is to provide a hook portion and an engaging body of a car door lock device when the car door is about to be pry open by a mischief of a passenger or the like. When in contact, an alarm signal is issued to prompt passengers in the car to stop the action, and the monitoring center is informed of the contact between the hook part of the car door lock device and the engaging body and the number of times of contact. An object is to provide an elevator car door locking device that can be operated.

[0007]

In order to achieve this object, the present invention provides a hanging metal fitting for a car, a rail frame slidably supporting the hanging metal fitting, a hook portion and an engaging body which can be engaged with each other. Provided, in the elevator car door lock device provided with an electromagnetic coil for driving the engagement body in the engagement direction, a detection means for detecting the contact between the hook portion of the car door lock device and the engagement body, The detection means exceeds the preset time, the determination means for determining the abnormality of the car door lock device, and the notification means for issuing an alarm signal according to the determination result of the determination means. is there.

[0008]

Since the present invention is configured as described above, when the car door is closed, the engaging body engages with the hook portion of the hanging metal fitting by the drive of the electromagnetic coil, and the car door is locked in the closed state. It At this time, the detection means detects whether or not the hook portion and the engagement body are in contact with each other. Then
If the detection time during which the detection means detects the contact between the hook portion and the engagement body exceeds a preset time, the determination means determines that the car door lock device is abnormal, and the determination result indicates the notification means. Can emit an alarm signal.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an elevator car door lock device according to the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the overall structure of an elevator car door lock device according to the present invention, FIG. 2 is a front view showing the details of an elevator car door lock device according to the present invention, and FIG. 3 is described with reference to FIGS. 1 and 2. It is an electric circuit diagram of the car door lock device of an elevator, and its related portion. 1 and 2 show the state of the elevator car door lock device in operation.

In general, an elevator is, as shown in FIG.
Various controls, for example, double door type car doors 2 and 3 provided in the car 20 and car door lock device 1 and car door lock device that lock the car doors 2 and 3 in a closed state when the car is running Elevator control circuit 2 that outputs commands
Have two.

In the car door lock device 1 described above, a hook portion 4a is provided on an upper part of a hanging metal fitting 4 for suspending one car door 2, and a hook is provided on an upper part of a hanging metal fitting 5 for hanging another car door 3. An engaging body 6 that is provided on a rail frame 24 that slidably supports the portion 5a and the hanging metal fittings 4 and 5 via a guide rail 23, and that can engage with the hook portions 4a and 5a, and the engaging body 6. It is composed of a driving electromagnetic coil 7. The hook portions 4a and 5a are shown in FIG.
The car doors 2 and 3 shown in FIG. 3 are provided at end positions near each other in a closed state. The engagement body 6 is formed in a U shape, and when the car doors 2 and 3 are closed, the electromagnetic coil 7 is formed.
By the driving of the
Engage so as to sandwich a. At this time, the sliding movement of the car doors 2 and 3 is blocked and the car doors are held in the locked state. A coil spring 8 is interposed between the engaging body 6 and the electromagnetic coil 7 to bias the engaging body 6 upward, that is, in the direction opposite to the hook portions 4a, 5a.

Then, a force is applied to the car door 2 or 3 in the opening direction, and the hook portion 4a or 5a slides to a position where the hook portion 4a or 5a comes into contact with the engaging body 6 and the hook portion 4a.
Alternatively, when the contact time between 5a and the engaging body 6 exceeds a predetermined time, the monitoring center 2 detects an abnormality in the usage state of the elevator.
As shown in FIG. 2, the car door lock device 1 that issues a warning to the contact 6 and the like contacts the movable contacts 9 and 10 provided on the hooks 4a and 5a and the hooks 4a and 5a with the engaging body 6. When slid to the position, the movable contacts 9, 10
The fixed contacts 11 and 12 provided on the engaging body 6 so as to be in electrical and mechanical contact with the normally contact A1 and the movable contact 9 which are closed when the movable contact 9 and the fixed contact 11 come into contact with each other. A normally open contact A2 that closes when the contact 10 and the fixed contact 12 contact each other, and the normally open contact A1 or A2.
Is closed, that is, the contact time between the hook 4a or 5a and the engaging body 6, and when the contact time exceeds a preset time, the normally open contact B1 is closed. When the open contact B1 is closed,
A determination unit C that determines that a force is artificially applied to the car door 2 or 3 in the opening direction and closes the normally open contacts C1 and C2, and a speaker for the passenger in the car by closing the normally open contact C1. In-car alarm device 21 for issuing a warning by 28
And a communication device 25 for reporting an abnormality in the usage state of the elevator to the monitoring center 26 via the communication line 27 by closing the normally open contact C2.

Further, as shown in FIG. 3, the car and lock device 1 includes a first circuit 31 including a contact time detector B,
The second circuit 32 including the determination unit B and the in-car notification device 21
And a fourth circuit 34 including the communication device 25. The first circuit 31 includes a normally open contact A1 that closes when the movable contact 9 and the fixed contact 11 contact each other, and a normally open contact A2 that closes when the movable contact 10 and the fixed contact 12 contact each other. When connected in parallel, the normally open contact A1 or A2 detects the closed time, and when the preset time is exceeded, the normally open contact B
The contact time detector B for closing 1 is connected in series. The second circuit 32 includes the normally open contact B1 and
When the normally open contact B1 is closed, it is determined that the car door 2 or 3 is artificially applied with force in the opening direction, and the normally open contact C is determined.
The discriminator C for closing 1 and C2 is connected in series. The third circuit 33 includes the normally open contact C1.
In addition, the in-car notification device 21 that issues a warning to the passengers in the car through the speaker 28 when the normally open contact C1 is closed is connected in series. The fourth circuit 34 is configured such that the normally open contact C2 and a communication device 25 that notifies the monitoring center 26 of an abnormality in the usage state of the elevator via the communication line 27 when the normally open contact C2 is closed are connected in series. Has become.

In this embodiment, when the car door lock device 1 shown in FIG. 2 is actuated, a hanging metal fitting 4 suspends the car door 2 when an artificial force is applied to the car door 2 in the opening direction. Also, the hook portion 4a provided on the upper portion of the hanging metal fitting 4 slides in the opening direction, and the hook portion 4a and the engaging body 6 come into contact with each other. At this time, the movable contactor 9 provided on the hook portion 4a and the fixed contactor 11 provided on the engagement body 6 make electrical and mechanical contact. As a result, the normally-open contact A1 is closed, and in FIG. 3, the power source (P) -the normally-open contact A1-the contact time detector B.
The circuit of the power supply (N) is closed. When the time during which the normally open contact A1 is closed exceeds a predetermined time, the contact time detection unit B closes the normally open contact B1 and the power source (P).
-Normally open contact B1-determination unit C-Since the circuit of the power supply (N) is closed, the normally open contact C1 and the normally open contact C2 are closed.
By closing the normally open contact C1, the power supply (P) -normally open contact C1
-In-cage alarm device 21-The circuit of the power supply (N) is closed,
The in-car notification device 21 issues a warning to the passengers in the car through the speaker 28. Also, by closing the normally open contact C2,
Power supply (P) -Normally open contact C2-Communication device 25-Power supply (N)
The circuit is closed, and the communication device 25 notifies the monitoring center 26 via the communication line 27 that the elevator is not in use. Further, the monitoring center 26 can grasp the frequency of abnormal use of the elevator by counting the number of times of the above-mentioned abnormal report.

In the embodiment thus constructed, when the car door lock device is actuated, the car door is artificially applied in the opening direction, and when the hook portion of the car door lock device and the engaging body come into contact with each other, the passenger in the car It is possible to prompt the operator to cancel the abnormal use of the elevator, and the monitoring center can grasp the number of times the elevator is abnormally used such that the hook of the car door locking device comes into contact with the engaging body. It is possible to make a priority inspection plan for the car door lock device before the hook portion or the engagement body of the lock device causes a failure such as breakage, and prevent the car door lock device from being damaged.

Further, in this embodiment, when the car door 2 or 3 is momentarily applied with force in the opening direction due to the bending of the rails while the car 20 is traveling, the car door 2 or 3 and the movable contact 9 or 11 are in fixed contact. Since the contact time with the child 10 or 12 does not exceed the preset time, the determination unit C
Since the car doors 2 or 3 are not discriminated when a force is artificially applied in the opening direction, the in-car alarm device 21 and the communication device 25 do not operate, and there is no fear of false alarms.

[0017]

Since the present invention is constructed as described above,
The hook of the car door lock device is constantly monitored for contact with the engaging body, and when the hook of the car door lock device is in contact with the engaging body when the car door is about to be pry open due to mischief of a passenger, etc. It is possible to issue an alarm signal for urging the passengers to stop the action, and to notify the monitoring center that the hook part of the car door locking device and the engaging body have come into contact with each other, and the number of times of the contact. ,
It is possible to grasp a site where the hook portion and the engagement body have a high number of contacts, and in such a site, inspecting the car door lock device at a short cycle leads to prevention of equipment failure.

[Brief description of drawings]

FIG. 1 is a front view showing the overall configuration of an embodiment of an elevator car door locking device according to the present invention.

FIG. 2 is a front view showing details of an embodiment of the elevator car door lock device according to the present invention.

FIG. 3 is an electric circuit diagram of a car door lock device and related parts of the elevator described in FIGS. 1 and 2.

[Explanation of symbols]

 1 car door locking device 2, 3 car door 4, 5 hanging metal fittings 4a, 5a hook part 6 engaging body 7 electromagnetic coil 8 coil spring 9, 10 movable contactor 11, 12 fixed contactor 20 car cage 21 in-car alarm device 22 Elevator control circuit 23 Guide rail 24 Rail frame 25 Communication device 26 Monitoring center 27 Communication line 28 Speaker 31 First circuit 32 Second circuit 33 Third circuit 34 Fourth circuit

Claims (2)

[Claims] 1. An electromagnetic coil for engaging a hook portion and an engaging body on a hanging metal fitting of a car and a rail frame slidably supporting the hanging metal fitting, and driving the engaging body in an engaging direction. In an elevator car door lock device equipped with, detection means for detecting contact between the hook portion and the engagement body of the car door lock device, and that the detection time by the detection means exceeds a preset time Thus, the elevator car door lock device, comprising: a determination unit that determines an abnormality of the car door lock device; and a notification unit that issues an alarm signal based on the determination result of the determination unit. 2. The detecting means according to claim 1, comprising means for detecting the number of times of contact between the hook portion and the engaging body, and the notifying means comprising means for notifying the monitoring center of the number of times of contact. Elevator car door locking device characterized by: