JPH07330256A - Locked condition detector for elevator car door - Google Patents

Abstract

PURPOSE:To provide a locked condition detector for elevator car doors which tells the abnormalities in the car door locking device through an outside alarm ing device and stops the opening and closing operations of the elevator car door. CONSTITUTION:Engaging condition detecting parts 13, 14 for detecting the engaging condition of hook parts 4a, 5a and an engaging body 6 of a car door locking device 1 and a judging part for judging whether or not the engaging condition of the hook parts 4a, 5a and engaging body 6 coincides with the running condition of an elevator according to the detecting result of the engaging condition detecting part and the running condition of the elevator are provided. When it is judged by the judging part that the engaging condition of the hook parts 4a, 5a and engaging body 6 does not coincide with the running condition of the elevator, abnormalities in the car door locking device 1 are told to a monitor center 26 through a communication circuit 27 by a communication device 25.

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 state detecting 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 traveling, or in an elevator delivered to a school, a student tries to pry the car door. There is. Along with this, an accident occurs in which the above passengers are trapped in the car because the car suddenly stops. There is also concern about accidents where passengers trapped in a car fall from the open doorway.

A conventional elevator car door locking device is
For example, as described in Japanese Patent Application Laid-Open No. 62-191389, a hook portion provided on a suspending metal hanging on a car and a rail frame movably supporting the suspending metal, and the hook portion There has been proposed an elevator car door lock device including an engageable engagement body and an electromagnetic coil for driving the engagement body. In this car door lock device, when the car door is closed and the car travels, the engagement 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, demagnetization of the electromagnetic coil causes the engagement body to return to the initial position, releasing the engagement state with the hook portion, and thereby the car door can be opened.

In this car door lock device, when checking whether the operating condition is normal, after manually operating the relay of the elevator control panel in the machine room to excite the electromagnetic coil of the car door lock device, From the side, the car door lock device can be visually inspected and the size of a predetermined part can be measured.

[0005]

By the way, in the above-mentioned prior art, the confirmation of the operating state of the car door locking device is limited to the time of the regular maintenance inspection.

For this reason, after the periodic inspection, when the engaging body of the car door locking device is disengaged due to loosening of the screw, or the hook portion and the engaging body remain engaged due to the breakage of the spring or the tightness of the sliding portion, The car door continues to open, but the hanging metal that suspends the car door and the car door cannot be slid. Therefore, in the case where the car is brought into the engaged state before the car arrives at the destination floor, the car door cannot be opened after the car is stopped, which causes a problem that passengers in the car are trapped. Further, there is a problem that the electric motor for opening and closing the car door continues to be energized in the opening direction or the closing direction of the car door, leading to a burnout accident of the electric motor winding. In addition, if the engaging body does not move due to the engaging body completely falling off or the sliding portion is stiff, the normal opening / closing operation will not be hindered.
It is dangerous because the car door lock function will not work.

The present invention has been made in view of the actual situation in the prior art as described above, and an object thereof is to constantly monitor the engagement state between the hook portion and the engaging body of the car door lock device to realize the car door lock device. When the elevator runs with the hook and the engagement body disengaged, or when the hook and the engagement body of the car door lock device remain engaged even when the elevator stops, the car door lock device is activated by the external alarm device. An elevator that can stop the opening and closing operation of the car door of the elevator when the hook of the car door locking device and the engaging body remain engaged even if the elevator stops. To provide a car door lock state detection device.

[0008]

In order to achieve this object, the present invention provides a hook portion and an engaging body that can be engaged with a hanging metal fitting of a car and a rail frame that slidably supports the hanging metal fitting. Is provided in an elevator car door lock device having an electromagnetic coil for driving the engagement body in the engagement direction, and the engagement state between the hook portion of the car door lock device and the engagement body is constantly maintained. An engagement state detection means for detecting and a determination means for determining whether the engagement state between the hook portion and the engagement body matches the operating state of the elevator are provided, and the engagement state between the hook portion and the engagement body is provided. When it is determined that the above does not match the elevator operating state, the external alarm device is configured to issue an abnormality of the car door lock device.

[0009]

According to the present invention, the engagement state detecting means for detecting the engagement state between the hook portion and the engagement body is provided, and the hook portion is detected based on the detection result of the engagement state between the hook portion and the engagement body. The discriminating means discriminates whether the engagement state between the engagement body and the engagement body matches the operation state of the elevator. Further, when the engagement state between the hook portion of the car door lock device and the engagement body does not match the operating state of the elevator, an abnormality of the car door lock device is reported by an external alarm device. As a result, when the elevator runs while the car door lock function does not work, or when the hook and the engaging body of the car door lock device remain engaged even when the elevator stops, the car door lock device It is possible to promptly rescue the trapped passengers and repair the failure by receiving the abnormal alarm.

Further, the determination means determines whether the engagement state between the hook portion and the engagement body matches the car door opening / closing condition of the elevator based on the detection result of the engagement state between the hook portion and the engagement body. Determine. Further, when the engagement state between the hook portion of the car door locking device and the engaging body does not match the opening / closing condition of the elevator car door, the opening / closing operation of the elevator car door is stopped. As a result, the elevator car door will not open or close when the car door is locked, and the electric motor for opening and closing the car door will not continue to be energized in the opening direction of the car door. Therefore, even when the engagement state between the hook portion and the engaging body of the car door locking device does not match the opening and closing conditions of the elevator car door, the electric motor for opening and closing the car door causes the car door to open and close. It is possible to prevent the accident that the motor winding is burned due to the continuous energization in the direction.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a car door lock state detecting device for an elevator according to the present invention will be described below with reference to the drawings. Figure 1
3 is a front view showing the overall configuration of the elevator car door lock state detection device according to the present invention, FIG. 2 is a front view showing the details of the elevator car door lock state detection device according to the present invention, and FIG.
FIG. 3 is an electric circuit diagram of an elevator car door lock state detection device, a car door opening / closing command circuit, and related portions thereof described in FIGS. 1 and 2. 1 and 2 show a state in which the hook portion of the car door locking device and the engaging body are engaged with each other.

In general, an elevator is, as shown in FIG.
For example, double door type car doors 2 and 3 provided in the car 20, a door motor 21 that opens and closes the car doors 2 and 3, and a car that locks the car doors 2 and 3 in a closed state when the car is traveling. The door lock device 1 and an elevator control circuit 22 that outputs various control commands to the door motor 21 and the car door lock device 1 are provided.

The car door lock device 1 described above is provided on the hook 4a provided on the upper portion of the hanging metal fitting 4 for suspending the one car door 2 and on the upper portion of the hanging metal fitting 5 for suspending the other car door 3. The hook portion 5a and the above-mentioned hanging metal fittings 4, 5
Is provided on a rail frame 24 that slidably supports the guide rail 23, and includes an electromagnetic coil 7 that drives an engaging body 6 that is engageable with the hook portions 4a and 5a. The hooks 4a and 5a are provided at end positions near each other when the car doors 2 and 3 shown in FIG. 1 are closed. The engagement body 6 is formed in a U-shape, and when the car doors 2 and 3 are closed, both ends of the engagement body 6 are sandwiched by the hook portions 4a and 5a by driving the electromagnetic coil 7. Engage with. 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 9 is interposed between the engaging body 6 and the electromagnetic coil 7 to urge the engaging body 6 upward, that is, in a direction opposite to the hook portions 4a, 5a.

When the engagement state between the hook portions 4a, 5a of the car door lock device 1 and the engagement body 6 does not match the operating condition of the elevator, the car door lock device 1 is operated. An abnormality is reported by the communication device 25 to the monitoring center 26 via the communication line 27, and the hook 4
a, 5a and the engagement state of the engagement body 6 do not match the opening and closing conditions of the car doors 2 and 3, the operation of the door motor 21 for opening and closing the car doors 2 and 3 is stopped, As shown in FIG. 2, the car door lock state detection device 10 that electrically stops the opening and closing operations of the car doors 2 and 3 always generates a uniform magnetic field provided at the tips of the hook portions 4a and 5a. Magnetic bodies 11 and 12 and the above-mentioned engaging body 6
Normally-closed contacts A1 and A2, which are provided on the magnetic heads 11 and 12 and are closed from the magnetic bodies 11 and 12, respectively, when the hook portions 4a, 5a and the engaging body 6 are in the disengaged state, and the magnetic body. Engagement state detectors 13 and 14 provided with normally open contacts A3, A4, A5, and A6 that are close to 11 and 12, respectively, and that are closed when the hook portions 4a, 5a and the engagement body 6 are in an engaged state The normally-closed contacts A1 and A2 provided in the engagement state detection units 13 and 14 and the elevator operation state detection device B close the normally-open contact B1 that is closed while the elevator is traveling, or detects the engagement state described above. Part 1
The normally open contacts A3, A4 and the elevator state detection device B provided in the Nos. 3, 14 close the normally closed contact B2 that is closed while the elevator is stopped.
And a determination unit C having a normally open contact C1 that determines that the engagement state of the engagement body 6 does not match the operating state of the elevator, and the contact is provided to the engagement state detection units 13 and 14. A5, A6 and the car door opening / closing command device D are closed when the car door opening / closing command is issued. When the normally open contact D1 is closed, the engagement state of the hook portions 4a, 5a and the engaging body 6 is the car door 2 3, a discriminator E having a normally-closed contact E1 that discriminates that the opening / closing conditions of No. 3 are not met.

Further, the car door lock state detecting device 10
Is, as shown in FIG.
A normally open contact B1 that closes when the elevator is running, a normally closed contact B2 that closes when the elevator is stopped, and a determination unit C
A second circuit 32 including an elevator operating state detection device B having a first circuit 31 including a normal opening contact B1 that is closed while the elevator is traveling, and a normally closed contact B2 that is open when the elevator is stopped. And a third circuit 33 including a normally open contact D1 and a discriminator E, which are closed when a car door open / close command device D issues a car door open / close command, and a normally open contact which is closed when a car door open / close command is issued. Contact D1 and normally open contact D1
Normally open contact D2 that closes after an arbitrary time elapses after closing
A fourth circuit 34 including a car door opening / closing command device D for instructing the operation of the door motor 21 including;
Fifth including normally closed contact E1 and normally open contact D2 of the determination unit E
Circuit 35 of FIG. The first circuit 31 includes a normally-closed contact A1 provided in the engagement state detection units 13 and 14,
A2 and normally open contact B1 that closes while the elevator is running
And a normally connected contact A3, A4 are connected in parallel, and a normally closed contact B2 that is closed while the elevator is stopped is connected in series to the determination unit C. It is a connected configuration. In the third circuit 33, the normally open contacts A5 and A6 provided in the engagement state detection units 13 and 14 are connected in parallel, and the normally open contact D1 is connected in series with the normally open contacts A5 and A6. Connected,
Further, the discriminating unit E is connected in series. The fifth circuit 35 has a normally-closed contact E that is opened by a determination unit E that determines that the engagement state between the hook portions 4a and 5a and the engagement body 6 does not match the opening / closing conditions of the car doors 2 and 3.
1, a normally open contact D2 that is closed after the normally open contact D1 is closed, and a normally open contact D2 that is closed after an arbitrary time period has elapsed are connected in series. Further, the normally open contact C1 is connected to the communication device 25, and when the normally open contact C1 is closed, the communication device 25 issues a notification to the monitoring center 26 via the communication line 27.

In this embodiment, the elevator travels with the hook 4a and the engaging body 6 disengaged due to disconnection of the electromagnetic coil 7 of the car door lock device 1 in FIG. At this time, due to the non-engagement state of the hook portion 4a and the engagement body 6, the magnetic flux density of the magnetic field generated from the magnetic body 11 is closed so that the normally closed contact A1 provided in the engagement state detection portion 13 is closed. Become thin. Since the operating state of the elevator at this time is traveling, the elevator operating state detection device B closes the normally open contact B1 that is closed while the elevator is traveling. As a result, in FIG. 3, the circuit of power supply (P) -normally closed contact A1-normally open contact B1-determination unit C-power supply (N) is closed, so that the normally open contact C1 is closed. As a result, when the normally open contact C1 is closed, the communication device 25 notifies the monitoring center 26 of an abnormality in the car door lock device 1 via the communication line 27.

Further, when the engaging body 6 of the car door lock device 1 falls off due to the loosening of the screw, the hook portion 4a and the engaging body 6 are brought into an engaged state, and when the elevator is stopped at this time, the magnetic force is generated. The magnetic flux density of the magnetic field generated from the body 11 is the normally open contact A provided in the engagement state detection unit 13 described above.
3, the closer A5 is closed, the darker it becomes. Since the operating state of the elevator at this time is stopped, the elevator operating state detection device B closes the normally closed contact B2 that is closed when the elevator is stopped. As a result, in FIG. 3, the circuit of power supply (P) -normally open contact A3-normally closed contact B2-determination unit C-power supply (N) is closed, so that the normally open contact C1 is closed. As a result, when the normally open contact C1 is closed, the communication device 25 notifies the monitoring center 26 of an abnormality in the car door lock device 1 via the communication line 27.

When the car door opening / closing command device D issues a car door opening / closing command at this time, the normally open contact D1 is closed. As a result, in FIG. 3, the circuit of power supply (P) -normally open contact A5-normally open contact D1-determination unit E-power supply (N) is closed, so that the normally closed contact E1 is opened. Further, although the normally open contact D1 is closed after an arbitrary time elapses after the normally open contact D1 is closed, the normally open contact D2 is closed. Since the contact E1 is open, the circuit of power supply (P) -normally closed contact E1-normally open contact D2-door motor 21-power supply (N) is not closed in FIG. The operation of the door motor 21 for opening and closing is stopped and the opening and closing operations of the car doors 2 and 3 are electrically stopped. Similarly, the hook portion 5a
Even when the engaging body 6 is in the engaged state, the operation of the door motor 21 for opening and closing the car doors 2 and 3 is stopped, and the opening / closing operation of the car doors 2 and 3 is electrically stopped.

In the embodiment thus constructed, the engagement state between the hook portion and the engaging body of the car door locking device is constantly monitored, and the engagement state between the hook portion and the engaging body is the elevator car door. When it is determined that the opening / closing condition is not met, the opening / closing operation of the elevator car door can be stopped.

[0020]

Since the present invention is configured as described above, the engagement state between the car door lock device hook portion and the engagement body is constantly monitored, and the hook portion and the engagement body of the car door lock device are not locked. Even if the elevator runs while it is engaged or the elevator is stopped, if the hook portion of the car door lock device and the engaging body remain engaged, an abnormality of the car door lock device is caused by the external alarm device. It is possible to issue a warning, and to promptly rescue a trapped customer or carry out a failure recovery. Further, the elevator car door is not opened and closed while the car door is locked, and the electric motor for opening and closing the car door is not continuously energized in the opening direction of the car door. Therefore, even when the engagement state between the hook portion and the engaging body of the car door locking device does not match the opening and closing conditions of the elevator car door, the electric motor for opening and closing the car door causes the car door to open and close. It is possible to prevent an accident in which the motor winding is burned by continuing to be energized in the closing direction or the closing direction.

[Brief description of drawings]

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

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

FIG. 3 is an electric circuit diagram of an elevator car door lock state detection device and related portions thereof described in FIGS. 1 and 2.

[Explanation of symbols]

 1 car door lock device 2, 3 car door 4, 5 hanging metal fittings 4a, 5a hook part 6 engagement body 7 electromagnetic coil 8 excitation circuit 9 coil spring 10 car door lock state detection device 11, 12 magnetic body 13, 14 engagement distance Detecting unit 20 Car 21 Door motor 22 Elevator control circuit 23 Guide rail 24 Rail frame 25 Communication device 26 Monitoring center 27 Communication line 31 First circuit 32 Second circuit 33 Third circuit 34 Fourth circuit 35 Fifth circuit

Claims (2)

[Claims] 1. A hanging metal fitting for a car and a rail frame slidably supporting the metal fitting are provided with engageable hook portions and an engaging body, and the engaging body is driven in an engaging direction. Engagement state detection means, which is provided in an elevator car door lock device having an electromagnetic coil and constantly detects an engagement state between the hook portion and the engagement body of the car door lock device, the hook portion and the engagement member. A determination means is provided for determining whether the engagement state with the combined body matches the operating state of the elevator, and when it is determined that the engagement state between the hook portion and the engagement body does not match the elevator operating state, A car door lock state detection device for an elevator, wherein a warning device reports the abnormality of the car door lock device. 2. A discriminating means for discriminating whether or not the engagement state between the hook portion and the engagement body matches the opening / closing state of the elevator car door, and the engagement state between the hook portion and the engagement body is the above. 2. The elevator car door lock state detecting device according to claim 1, wherein the opening / closing operation of the elevator car door is stopped when it is determined that the state does not match the opening / closing state of the elevator car door.