JP4259144B2 - Elevator door control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator door control device that operates even when a fire occurs.
[0002]
[Prior art]
As a recent elevator door control device, PWM (pulse width modulation control) chopper control device and inverter control are performed to control the opening and closing of the door using a semiconductor element represented by a microcomputer for the purpose of improving control performance. Equipment etc. are adopted.
[0003]
A typical control device is shown in FIG. (For example, see Patent Document 1)
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-291755
That is, the AC voltage supplied from the AC power source 1 (normal power source) via the tail cord Tc (power / signal line drawn from the outside of the elevator car) is full-wave rectified and rectified by the diode bridge circuit 2. The DC voltage is smoothed by the capacitor 3 and applied to the four switching elements 4a, 4b, 4c and 4d. The base drive circuit 5 takes charge of opening / closing the switching elements 4a, 4b, 4c and 4d based on the output of the encoder 7 directly connected to the shaft of the door drive motor 6. The door control microcomputer 8 supplies a signal to the base drive circuit 5 based on the program stored in the memory 9 to control the conduction state of the switching elements 4a, 4b, 4c, and 4d. The door driving DC motor 6 is configured to rotate by the output voltage of the switching elements 4a, 4b, 4c, and 4d to control opening and closing of the door mechanism 10.
[0006]
[Problems to be solved by the invention]
By the way, the main parts of such control devices are usually microcomputers, semiconductors such as IGBTs and ICs, and once a fire occurs, they are very fragile and there is a high possibility that the door cannot be opened or closed at all. It was. It is also conceivable that the tail cord Tc itself may be disconnected due to a fire.
[0007]
The present invention has been made in view of the above points, and an object of the present invention is to provide an elevator door control device capable of opening and closing a door even in an emergency.
[0008]
[Means for Solving the Problems]
The present invention is such that the door of the elevator car is driven to open and close by a drive mechanism that is connected to a normal power source installed outside the elevator car by a tail cord and receives power supply from the normal power source and through a semiconductor element. , the elevator car in the provided emergency power Rutotomoni, comprising switching means for switching between the normal power supply and the emergency power supply, and a driving means for driving the door in the DC motor by a control containing no semiconductor element at all, very sometimes those exerting said drive means through said emergency power by said switching means.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
According to the present invention, in an emergency, the door is opened and closed with only a simple device provided in the elevator car.
[0010]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing the inside of a door control device according to the present apparatus.
[0011]
In the figure, the same reference numerals as those in FIG. 3 denote the same components, but 11 is an emergency power source such as a storage battery provided on the car, and 12 is a switching device for switching between the normal power source 1 and the emergency power source 11. In the event of a fire, the emergency power supply 11 can be switched over. 13 is a car operation panel provided in the car, and 14 is a car door control device according to the present invention.
[0012]
Here, FIG. 2 shows an example of a specific electric circuit diagram of the emergency power supply 11 and a part of the car operation panel 13 and the car door control device 14 in FIG. 1, and 6a is a door driving DC motor 6 in FIG. The armature 6b is a field winding of the electric motor 6, R1 to R3 are resistances, and resistance values are set in advance so that the door driving electric motor 6 can be reliably operated at a high torque and at a low speed. It is set. 12a, 12b and 12c are switching contacts of the switching device 12, L1 and L2 are relay coils, L1a and L2a are normally open contacts of the corresponding relays, S1 is a door closing switch in the car, and S2 is a door opening in the car. Switches l _{1 to} l ₄ are the respective lines. In other words, this door drive control device does not include any semiconductor elements, and is composed only of parts having high heat resistance.
[0013]
1 and 2, once a fire occurs, the switching device 12 first switches from the normal power source 1 to the emergency power source 11, and the circuit configuration in the door control device 14 is also changed. That is, while being disconnected from the tail cord Tc, an extremely simple door control circuit based on the emergency power supply 11 is configured as shown in FIG. 2 by switching the contacts 12a, 12b, and 12c. That is, when a passenger in the car operates the door closing switch S1 or the door opening switch S2, the instructed relay (L1 or L2) is excited and the corresponding contact (L1a or L2a) is closed, and the electric motor A predetermined current flows in the direction instructed by the armature 21 and the door opens and closes very slowly and strongly.
[0014]
In the above description, the case of a fire is taken as an example in case of an emergency, but it may be an emergency such as an earthquake and is not particularly limited to the embodiment. Further, the case of a chopper control drive mechanism using a DC motor has been described as an example. However, even if it is a door of an inverter control drive mechanism using an AC motor, the present invention can be realized by installing a DC motor separately. Can be easily implemented.
[0015]
【The invention's effect】
As described above, according to the present invention, since the door can be opened and closed with only a simple device provided in the elevator car in an emergency, the possibility of passengers being trapped in the car is extremely low and reliable. A highly efficient elevator apparatus can be obtained.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.
FIG. 2 is a circuit diagram showing the inside of a door control device according to the present apparatus.
FIG. 3 is a block diagram showing a conventional elevator door control device.
[Explanation of symbols]
6 DC motor 6a for driving door Armature 6b of DC motor 6 Field winding 11 of DC motor Emergency power supply 12 Switching device 13 Car operation panel 14 Car door control device S1 Door closing switch S2 Door opening switch L1, L2 coils L1a, normally open contact Tc tail code l ₁ of L2a _{relay, l 2, l 3, l} 4 power and signal lines

Claims (6)

The elevator car is connected to a normal power source installed outside the elevator car by a tail cord, and the door of the elevator car is driven to open and close by a drive mechanism that receives power from the normal power source and passes through a semiconductor element. Rutotomoni provided emergency power to, the emergency power source and switching means for switching between the normal power supply, and a driving means for driving the door in the DC motor by a control containing no semiconductor element completely, said switching means in an emergency door control device for an elevator, characterized in that exert the driving means through said emergency power by.   The elevator drive control device according to claim 1, wherein the drive mechanism is a drive mechanism using a DC motor by PWM chopper control.   The elevator drive control device according to claim 1, wherein the drive mechanism is a drive mechanism using an AC motor by inverter control. The elevator door control device according to any one of claims 1 to 3, wherein the emergency is a fire. The elevator door control device according to any one of claims 1 to 4, wherein the driving means is composed of only parts having high heat resistance. The elevator door control device according to any one of claims 1 to 5, wherein the semiconductor element includes at least a microcomputer, an IGBT, and an IC .

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