JPH09309682A - Elevator car door device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a foreign matter in an opening/closing path by increasing driving force at the time of repeating opening/closing action when load acts upon the opening/closing action of a car door. SOLUTION: When abnormal load is reported from an abnormal load detector during the movement of a car door in an opening/closing direction, the car door moves in the opening direction. The car door is once fully opened and then moved again in the closing direction. At this time, torque of a door opening/closing motor 32 is increased by the action of variable resistance 35. When abnormal load is reported again during the movement of the car door in the closing direction, the car door moves again in the opening direction. The car door is once fully opened again and then moved again in the closing direction. At this time, torque of the door opening/closing motor 32 is further increased by the action of variable resistance 35, 36. Unless abnormal load is detected during the movement of the car door in the closing direction, the opening/closing action of the car door is completed. If abnormal load is reported, an elevator device is stopped and put out of restart.

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 apparatus that repeats opening and closing operations when a load is applied to the opening and closing operations of a car door.

[0002]

2. Description of the Related Art A car door of an elevator car opens and closes along a threshold groove serving as an opening and closing path. When a foreign matter is present on the threshold and the foreign matter interferes with the opening / closing operation of the car door, it is detected that a load acts on the car door, and as a result, the opening / closing operation of the car door is repeated again.

[0003]

As in the conventional elevator car door apparatus, merely repeating the opening / closing operation of the car door cannot necessarily remove the foreign matter present in the sill groove, and the repeated opening / closing operation is repeated. May delay the operation of the elevator.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an elevator car door device which can reliably remove foreign matter in the opening / closing path with a simple structure.

[0005]

In order to achieve the above object, according to the present invention, a car door for performing an opening / closing operation along an opening / closing path and a door for generating a driving force for performing the opening / closing operation of the car door are provided. An elevator car door apparatus that includes an opening / closing motor and repeats the opening / closing operation when a load acts on the opening / closing operation of the car door, and includes a control unit that increases the driving force when the opening / closing operation is repeated again. A featured elevator car door apparatus is provided.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an elevator apparatus 10 to which the elevator car door apparatus according to the present invention is applied. The elevator apparatus 10 includes an elevator car 12 that moves up and down along a hoistway 11. The elevator car 12 includes a hoistway 11 and a hoisting motor 14 installed in a machine room 13 above the ceiling.
Thus, it is driven up and down while being balanced with the counterweight 15. The elevator car 12 is provided with a car entrance (not shown) that allows passengers to get in and out of the car 12 room. This car entrance is opened and closed by a car door (not shown) that moves along a sill groove serving as an opening / closing path. To be done. The opening / closing operation of the car door is performed by a driving force generated by a door opening / closing motor (not shown).

The operation of the elevator apparatus 10 is performed in the machine room 13
It is controlled by the elevator control device 16 installed in the. The elevator control device 16 includes a door control unit 17 that controls the operation of the car door when stopped at the stop floor, and a motor drive control unit 18 that controls the operation of the door opening / closing motor according to a command from the door control unit 17. . The door opening / closing motor is driven according to an instruction from the motor drive control unit 18, and the driving force thereof causes the car door to open / close.

An abnormal load detector 19 attached to the elevator car 12 detects an abnormal load with respect to the closing operation of the car door. The detected abnormal load is transmitted through the cable 20 to the door load detection storage unit 21 in the elevator control device 16.
Will be reported to The opening / closing operation of the car door is repeatedly controlled based on such an abnormal load.

FIG. 2 is a ladder diagram for explaining the operation of the motor drive controller 18. When the door control unit 17 issues a door opening command, the first excitation coil 30 is not excited, the normally open contact 30a for opening the door remains open, and the normally closed contact 30b for closing the door remains closed. As a result, a current is induced in the second exciting coil 31, and the normally open contacts 31a and 31b are closed.
This closing induces the rotation of the door opening / closing motor 32 in the opening direction.

On the contrary, when the door control unit 17 issues a door closing command, a current is induced in the first exciting coil 30. As a result, the normally open contact 30a is closed and the normally closed contact 30b is opened. A current is induced in the third excitation coil 33, and the normally open contact 3
3a and 33b are closed. By this closing, the door opening / closing motor 32 rotates in the direction opposite to the opening direction, that is, in the closing direction, and the car door is closed.

The induction of current to the first excitation coil 30 is switched by the load detection switch 34 in response to detection of an abnormal load. As will be described later, the resistance values of the two variable resistors 35 and 36 can be changed according to this switching. By changing the resistance value, the driving force, that is, the torque of the door opening / closing motor 32 is adjusted. Whether or not to adjust this torque is controlled by the normally open contacts 37 and 38.

FIG. 3 shows a ladder diagram for explaining the operation of the door load detection storage unit 21. In the door load detection storage unit 21, a load detection exciting coil 41 is excited in response to the closing operation of the mechanical normally open contact 40 provided in the abnormal load detector 19.
Is provided. In response to the excitation of the load detecting exciting coil 41, the load detecting switch 34 of the motor drive control unit 18 is opened. In addition, the door load detection storage unit 21 closes three normally open contacts 41a, 41b, 41c. The closing of the normally open contact 41a induces the excitation of the first closing operation memory exciting coil 42. This first closing motion memory exciting coil 42
The normally open contact 42a is closed by the excitation of, and the circuit of the first closing operation storing excitation coil 42 is self-held. At the same time, the normally open contacts 42b to 42f are closed.

The fact that the normally open contact 42b is closed, that is, the first closing operation is performed is based on the fact that the first opening operation memory exciting coil 4 is used.
Induce excitation of 3. At this time, since the load detection switch 34 is opened and the second exciting coil 31 is excited in response to the closing of the mechanical normally open contact 40, the normally open contact 31c is closed as in the door open command. . The normally open contact 43a is generated by the excitation of the first opening operation memory exciting coil 43.
Is closed, and the circuit of the first opening motion memory exciting coil 43 is self-held. At the same time, the normally open contacts 43b and 43c are closed.

First torque-up command exciting coil 44
Receives the fact that the first closing operation has been performed by closing the normally open contact 42c, the fact that an abnormal load has been detected by closing the normally open contact 41b, and the second closing by closing the normally open contact 33c. When the fact that the operation is started is received, it is excited. When the first torque-up command exciting coil 44 is excited, the normally-open contact 44a is opened.
Is closed, and the circuit of the first torque-up command exciting coil 44 is held by itself. At the same time, the normally open contact 44b is closed, and the normally open contact 37 of FIG. 2 is closed. As a result, the torque of the door opening / closing motor 32 increases due to the function of the variable resistor 35.

The second opening operation memory exciting coil 45 receives the fact that the first closing operation is executed by closing the normally open contact 42d, and the fact that the first torque-up is completed by closing the normally open contact 44b. Received, in addition,
When the fact that the second opening operation has been executed by closing the normally open contact 31d is received, as a result, it is excited. This second
The normally-open contact 45a is closed by the excitation of the opening operation memory exciting coil 45, and the second opening operation memory exciting coil 45 is closed.
Circuit is self-held. At the same time, the normally open contact 45b is closed.

The second torque-up command exciting coil 46 is excited when the fact that the third closing operation has been executed is notified. This second torque-up command exciting coil 46
The normally open contact 46a is closed by the excitation of, and the circuit of the second torque-up command exciting coil 46 is self-held.
At the same time, the normally open contact 46b is closed, and the normally open contact 3 of FIG.
8 is closed. As a result, the torque of the door opening / closing motor 32 is further increased by the action of the variable resistor 36.

When the third opening motion storage exciting coil 47 receives the fact that the second torque-up is completed and then the opening motion is reported again by the action of the normally-open contact 31e, as a result, the excitation coil 47 is excited. To be done. The normally open contact 47a is closed by the excitation of the third opening motion storage exciting coil 47, and the circuit of the third opening motion storage exciting coil 47 is held by itself.

The mechanical normally open contact 48 for detecting the fully closed state of the car door exemplifies the exciting coil 49 by its closing operation, and the normally closed contacts 49a to 49a interlocked with the exciting coil 49.
Excitation of the excitation coils 42 to 47 can be canceled through the function of 49f.

The operation of the present invention will be described with reference to the flow chart shown in FIG. In the first step S1, the car door closing operation is started. A current is induced in the first exciting coil 30 of FIG. 2, and as a result, the normally open contacts 33a and 33b are closed. A current limited by the maximum resistance value of the variable resistors 35 and 36 flows to the door opening / closing motor 32, and the car door moves in the closing direction.

During the movement of the car door in the closing direction, it is judged in the second step S2 whether or not an abnormal load is detected. If no abnormal load is detected, the process proceeds to the third step S3, and the car door closing operation is completed. Full closing of the car door is detected by the mechanical normally open contact 48, and the excitation coils 42 to 47 are detected.
All excitations of are cancelled.

When an abnormal load is reported from the abnormal load detector 19 in the second step S2, that is, when the mechanical normally open contact 40 is closed, the load detecting exciting coil 41 is excited. Based on this excitation, the load detection switch 34 is opened and the second excitation coil 31 is excited. Normally open contact 3
The car door moves in the opening direction by the action of 1a and 31b (fourth step S4). This opening operation excites the first opening operation storage exciting coil 43.

The car door is once fully opened, and then the car door is again moved in the closing direction in the fifth step S5. At this time, since the first closing operation memory exciting coil 42 and the first opening operation memory exciting coil 43 continue to be excited, when the normally open contact 33c is closed by the start of the closing operation again, The torque-up command exciting coil 44 is excited. The normally open contact 37 of FIG. 2 is closed, and the torque of the door opening / closing motor 32 is increased by the action of the variable resistor 35.

During the movement of the car door in the closing direction, it is determined again in the sixth step S6 whether or not an abnormal load is detected. If no abnormal load is detected, the third step S
Proceeding to 3, the same processing as described above is performed. When an abnormal load is reported, the car door moves in the opening direction again in the seventh step S7. This opening operation energizes the second opening operation storage exciting coil 45.

The car door is once fully opened again, and then the car door is moved again in the closing direction in the eighth step S8. At this time, since the first closing motion memory exciting coil 42, the first opening motion memory exciting coil 43, and the second opening motion memory exciting coil 45 continue to be excited, they are normally opened by the start of the closing motion again. When the contact 33d is closed, the second torque-up command exciting coil 46 is excited. The normally open contacts 37 and 38 of FIG.
The torque of the door opening / closing motor 32 is further increased by the actions of Nos. 5 and 36.

During the movement of the car door in the closing direction, it is again determined in step S9 whether or not an abnormal load is detected. If no abnormal load is detected, the third step S
Proceeding to 3, the same processing as described above is performed. When the abnormal load is reported, the elevator apparatus is stopped and made unable to restart in the tenth step S10.

In this way, when the abnormal load is detected and the car door closing operation is repeated, the torque of the door opening / closing motor 32 is gradually increased, so that the foreign matter existing in the threshold groove of the elevator device is removed. The probability that you can do it increases. As a result, it is possible to reduce the failure of the elevator device due to the foreign matter existing in the threshold groove, and it is possible to make the operating time of the elevator device efficient.

[0028]

As described above, according to the present invention, when the abnormal load is detected and the closing operation of the car door is repeated, the torque of the door opening / closing motor 32 is gradually increased. Increases the probability of being able to remove foreign objects in the threshold ditch.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an elevator apparatus to which an elevator car door apparatus according to the present invention is applied.

FIG. 2 is a ladder diagram of a motor drive control unit.

FIG. 3 is a ladder diagram of a door load detection storage unit.

FIG. 4 is a flowchart showing the operation of the elevator car door system.

[Explanation of symbols]

10 elevator equipment, 12 elevator cars, 21
Door load detection storage unit.

Claims (1)

[Claims] 1. A car door that opens and closes along an opening and closing path, and a door opening and closing motor that generates a driving force for opening and closing the car door, when a load acts on the opening and closing operation of the car door. An elevator car door apparatus that repeats the opening and closing operation again, further comprising: a control unit that increases the driving force when the opening and closing operation is repeated again.