JP2008133120A - Elevator door controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator door controller capable of identifying a light emitter or receiver failure. <P>SOLUTION: An elevator door controller comprises a light emitter 30 equipped with a light-emitting diode 35 for generating a light beam to detect an obstruction in the doorway and its vicinity according to a door operation signal, a light receiver 50 equipped with a phototransistor 51 which turns on when receiving a light beam and turns off when the light beam is blocked, an obstruction judging section 90 for judging that an obstruction is in the doorway when the phototransistor 51 is off although a door operation signal exists, a transistor 31 for turning on and off a current flowing through the light-emitting diode 35, a light emitter failure determination section 112 for determining whether the light emitter 30 fails to operate according to a first voltage value between the transistor 31 and the light-emitting diode 35, and a light receiver failure determination section 114 for determining whether the light receiver 50 fails to operate according to a second voltage value of the phototransistor 51. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to an elevator door control device.

In a conventional elevator door control device, as described in Patent Document 1 below, an entrance / exit frame having a pair of vertical frames and an upper frame provided between the vertical frames is provided at the car entrance / exit. An elevator door control device used in an elevator device to control the opening / closing operation of a car door that opens and closes a car doorway, and detects an obstacle near a vertical frame, according to information from the obstacle sensor A door control unit that controls the opening and closing operation, and a failure detection unit that detects a failure of the obstacle sensor by inspecting the operation of the obstacle sensor.

According to such a door control device, since the failure detection unit that detects the failure of the obstacle sensor by inspecting the operation of the obstacle sensor is used, it is possible to prevent the obstacle from being drawn between the entrance frame and the door. It can be surely prevented and the reliability can be improved. That is, the failure of the obstacle sensor can be detected.
JP 2004-137004 A

However, in the door control device, since it is not possible to specify whether one of the projector that generates the electron beam that constitutes the obstacle sensor or the receiver that receives the electron beam has failed, the projector and the receiver set are not included. It must be replaced or inspected if the sender or receiver is faulty. For this reason, when replacing the projector and the light receiver set, there is a problem that the replacement work is complicated.
Further, when inspecting which one of the projector and the light receiver is broken, there is a problem that the inspection work is complicated.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator door control device that can identify which one of the projector and the light receiver has failed.

An elevator door control device according to a first aspect of the present invention includes a first light projecting unit including a first semiconductor element that generates a light beam for detecting an obstacle near an entrance of an elevator based on a door opening / closing signal; A second semiconductor element that turns on when the light beam is received; and a light receiving means that turns off the second semiconductor element by blocking the light beam; and the second semiconductor element is turned off when the door open / close signal is generated. Obstacle determining means for determining that an obstacle is present, semiconductor switch means for turning on and off the current flowing through the first semiconductor element, and a first switch between the semiconductor switch means and the first semiconductor element. A first failure judging means for judging an on / off failure of the first light projecting means based on one voltage value; and an on / off of the light receiving means based on a second voltage value between the second semiconductor elements. A second failure determining means for determining a failure, is characterized in that it comprises a.

An elevator door control device according to a second aspect of the present invention is provided near a light receiving means, a second light projecting means for irradiating the light receiving means with an auxiliary light beam, and the light receiving means for receiving the auxiliary light beam from a second light projecting means. An off-fault check means for irradiating the means and judging an off-fault of the light-receiving means based on a second voltage value between the second semiconductor elements, and the second fault judgment means judges that it is an off-fault The door opening / closing signal is cut off, and the auxiliary light beam is applied to the light receiving means from the second light projecting means.
According to such a door control device, when the second failure determination means determines that the failure is off, the door opening / closing signal is cut off, and the auxiliary light beam is emitted from the second light projecting means to the light receiving means. Based on the second voltage value V2 between the second semiconductor elements, the on / off failure of the light receiving means is determined. Thereby, there is an obstacle between the light projecting means and the light receiving means, and it can be easily identified whether the light receiving means is turned off or turned off due to a failure. Therefore, the detection accuracy of the off failure of the light receiving means is improved.

According to the present invention, the semiconductor switch means that is turned on / off by the current flowing through the first semiconductor element, and the first light projecting means is turned on based on the first voltage value between the semiconductor switch means and the first semiconductor element. A first failure determination means for determining an off failure and a second failure determination means for determining an on / off failure of the light receiving means based on a second voltage value between the second semiconductor switch elements; An on / off failure of the first light projecting means and the light receiving means can be detected, and it can be specified which of the first light projecting means and the light receiving means is malfunctioning. For this reason, it is not always necessary to replace the first light projecting means and the light receiving means set, and the replacement work can be simplified.

Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall configuration diagram of an elevator door control device showing an embodiment of the present invention, and FIG. 2 is a circuit diagram including a block diagram of the door control device shown in FIG.
In FIG. 1, an elevator receives a door motor 200 that opens and closes a car door 10, a door control device 100 that drives and controls the door motor 200, an abnormal signal from the door control device 100, and generates a door open / close signal. And an elevator control panel 300.
In FIG. 1, a car doorway 3 is provided in a car (car room), and the car doorway 3 is opened and closed by a pair of car doors 10. An entrance / exit frame 12 is fixed to the edge of the car entrance 3. The entrance / exit frame 12 includes a pair of vertical frames 5 extending in the vertical direction and an upper frame 7 provided between the upper ends of the vertical frames 5 and extending horizontally.

A pair of light projectors 30 serving as first light projecting means for emitting detection light (arrows in the figure) are embedded substantially along the vertical frame 5 in the vicinity of the lower ends of the side surfaces of the vertical frame 5 facing each other. A light receiver 50 as a pair of light receiving means for receiving detection light (beam light) from the projector 30 is embedded in the lower surface of the upper frame 7. The light receiver 50 is disposed in the vicinity of both ends in the width direction of the car doorway 3. The obstacle sensor includes a projector 30 and a light receiver 50. As shown in FIG. 2, the obstacle sensor 90 detects an obstacle (not shown) near the vertical frame 5 and outputs an obstacle detection signal 90. It is formed to have. A pair of auxiliary projectors 70 as second light projecting means are provided in the vicinity of the light receiver 50.

In FIG. 2, the door control device 100 includes a transmission unit 101 that generates a square-wave pulse signal at a constant period by a door open signal or a door close signal. The projector 30 generates a pulsed focused beam delayed by a half cycle by the pulse signal, and the light receiver 50 receives the focused beam and outputs a pulsed square wave delayed by a half cycle from the focused beam. It is formed to generate.
The projector 30 has a resistor 33 connected to a control power source E, and a transistor 31, a light emitting diode 35, and a resistor 33 are connected in series as semiconductor switch means, and the transistor 31 is connected by a pulse signal from the transmitter 101. It is formed so that pulsed square wave light is generated by turning on and off the current flowing in the light emitting diode 35 as the first semiconductor element.
The light receiver 50 has a resistor 53 connected to a control power source E, and a phototransistor 51 as a second semiconductor element that receives light from the projector 30 and turns on / off and a resistor 53 are connected in series. The phototransistor 51 is turned on and off by the current flowing through the light emitting diode 35, and the collector of the phototransistor 51 is formed to obtain a pulsed square wave voltage.

The failure determiner 110 detects the first voltage value between the transistor 31 and the light emitting diode 35 and generates the first voltage detection signal, and the second voltage value of the phototransistor 51. And a second voltage detector 105 that generates a second voltage detection signal, and determines failure of the projector 30 and the light receiver 50 based on the first and second voltage detection signals and the door open / close signal. And a normally-open contact 110a that is closed when a door open / close signal is generated and opened when it is determined that the failure has occurred.
The failure determiner 110 includes a projector failure determination unit 112 as a first failure determination unit that determines an on / off failure of the projector 30 based on a first voltage value between the transistor 31 and the light emitting diode 35, and a phototransistor. And a photoreceiver failure determination unit 114 as a second failure determination unit that determines an ON / OFF failure of the photoreceiver 50 based on a second voltage value between the collector and the emitter 51.

When the failure determination device 110 primarily determines that the light receiver 50 is in an off failure, the auxiliary light from the auxiliary light projector 70 is irradiated to the phototransistor 51 of the light receiver 50 to determine again whether or not the light receiver 50 is in an off failure. An off-fault confirmation unit 120 that confirms the determination is provided.
The auxiliary projector 70 includes a resistor 73 connected to the control power source E, and a transistor 71, a light emitting diode 75, and a resistor 73 are connected in series. The transistor 71 is turned on by a pulse signal from the off-fault check unit 120. It is formed so that pulsed square wave light is generated by turning on and off the current flowing through the light emitting diode 75.

The operation of the door safety device configured as described above will be described with reference to FIGS. FIG. 3 is a time chart showing the operation of the door control device shown in FIG. 2, and FIG. 4 is a flowchart showing the operation of the door control device shown in FIG.
Now, when a door open signal is generated from the elevator control panel 300 at time t0, the normally open contact 110a is closed (step S101), and the transmitter 101 of the door control device 100 sends a square wave pulse signal to the projector 30. The signal is input to the base of the transistor 31, and the transistor 31 is turned on / off (step S103). A square wave current flows through the light emitting diode 35, light is generated from the light emitting diode 35 in a square wave shape, and irradiates the phototransistor 51 of the photodetector 50. At time t1, the first voltage detector 103 inputs the first voltage value between the transistor 31 and the light emitting diode 35 to the determiner 110 (step S105), and the second voltage detector 105 receives the phototransistor 51. The second voltage value between the collector and the emitter is input to the failure determiner 110 (step S107).

At time t2, the projector determination unit 112 of the failure determiner 110 determines that the first voltage value is not converted into a square wave, and if the control power source E is constant, the projector 30 is turned off, and the first voltage value is If the sum of the on-voltages of the transistor 31 and the light emitting diode 35 is not converted into a square wave shape, it is determined that the projector 30 is on. Further, the light receiver determination unit 114 of the failure determiner 110 determines that the light receiver 50 is in an off failure if the second voltage value does not change in a square wave shape and is a constant control power supply E, and the transistor 51 is turned on. If so, it is determined that the photoreceiver 50 is on-failed (step S109).
When the first and second voltage values change in a square wave shape, it is determined as normal.

At time t3, the failure determination unit 110 determines that the light receiver 50 is in an off failure (step S111). When the failure determination unit 110 determines that the failure is in the off state, the off failure confirmation unit 110 opens the normally open contact 110a at time t4. And an ON signal is input to the phototransistor 51 of the light receiver 70 (step S113). The second voltage detector 105 inputs the second voltage value between the collector and emitter of the phototransistor 51 to the failure determiner 110. The failure determiner 110 is a control power supply E having a constant second voltage value. If it is determined that the photoreceiver 50 is in an off failure and the transistor 51 is on, the photoreceiver 50 is determined to be normal (step S115).

The elevator door control device of the above embodiment includes a first projector 30 having a light emitting diode 35 that generates a light beam for detecting an obstacle near the entrance of the elevator based on a door opening / closing signal, and receiving the light beam. It has a phototransistor 51 that is turned on, a light receiver 50 that turns off the phototransistor 51 by blocking the light beam, and an obstacle when the phototransistor 51 is turned off when a door open / close signal is generated. An obstacle determination unit 90 for determining, a transistor 31 that is turned on / off by a current flowing through the light emitting diode 35, and an on / off failure of the projector 30 based on the first voltage value V 1 between the transistor 31 and the light emitting diode 35. Based on the second voltage value V2 between the projector failure determination unit 112 and the phototransistor 51. And a light receiver failure determination unit 114 that determines on / off failure of the light receiver 50.
According to such a door control device, the projector failure determination unit 112 is configured so that the transistor 31 that is turned on / off by the current flowing through the light emitting diode 35 and the first voltage value between the transistor 31 and the light emitting diode 35 are used. Determine on / off failure. The photoreceiver failure determination unit 114 determines an on / off failure of the photoreceiver 50 based on the second voltage value V <b> 2 between the phototransistors 51. As a result, it is possible to identify whether either the light projector 30 or the light receiver 50 has an on / off failure, thereby reducing the replacement work of the light projector 30 and the like due to the failure.

Further, the door control device is provided in the vicinity of the light receiver 50, and illuminates the auxiliary light beam 70 to the light receiver 50 with the auxiliary light beam 70, and irradiates the light receiver 30 with the auxiliary light beam from the auxiliary light projector 70. And an off-fault confirmation unit 120 that judges on / off failure of the photoreceiver 50 based on the second voltage value V2, and shuts off the door open / close signal when the photoreceiver fault judgment unit 114 judges that the fault is off. At the same time, an auxiliary light beam is emitted from the auxiliary projector 70 to the light receiver 50.
According to such a door control device, when the light receiver failure determination unit 114 determines that the failure is off, the door opening / closing signal is interrupted, and the auxiliary light beam is emitted from the auxiliary projector 70 to the light receiver 50, and the off failure confirmation unit 120. Determines on / off failure of the light receiver 50 based on the second voltage value V <b> 2 between the phototransistors 51. Thereby, there is an obstacle between the projector 30 and the light receiver 50, and it can be easily identified whether the light receiver 50 is turned off or turned off due to a failure. Therefore, the detection accuracy of the off failure of the light receiver 50 is improved.

  The present invention can be applied to an elevator door control device.

1 is an overall configuration diagram of an elevator door control device according to an embodiment of the present invention. It is a circuit diagram including the block diagram of the door control apparatus shown in FIG. It is a time chart which shows operation | movement of the door control apparatus shown in FIG. It is a flowchart which shows operation | movement of the door control apparatus shown in FIG.

Explanation of symbols

30 Projector, 31 Transistor 31, 35 Light-emitting diode 35, 50 Photoreceiver, 51 Phototransistor, 70 Auxiliary projector, 90 Obstacle determination unit, 110 Failure determiner 110, 112 Projector failure determination unit 112, 114 Receiver failure determination unit, 120 Off failure confirmation unit.

Claims (2)

First light projecting means having a first semiconductor element for generating a light beam for detecting an obstacle near an entrance of an elevator based on a door opening / closing signal;
A light receiving means for turning on the second semiconductor element by blocking the light beam;
Obstacle judging means for judging that the second semiconductor element has an obstacle when the door opening / closing signal is generated;
Semiconductor switch means for turning on and off the current flowing through the first semiconductor element;
First failure determination means for determining an on / off failure of the first light projecting means based on a first voltage value between the semiconductor switch means and the first semiconductor element;
Second failure determination means for determining an on / off failure of the light receiving means based on a second voltage value between the second semiconductor elements;
An elevator door control device characterized by comprising: A second light projecting unit provided in the vicinity of the light receiving unit and irradiating the light receiving unit with an auxiliary light beam;
Off-fault confirmation means for irradiating the light-receiving means with the auxiliary light beam from the second light projecting means and for determining whether the light-receiving means is off based on a second voltage value between the second semiconductor elements; Prepared,
When the second failure determination means determines that it is an off failure, the door opening / closing signal is interrupted and the auxiliary light beam is irradiated from the second light projecting means to the light receiving means.
The elevator door control device according to claim 1.

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