JP4601935B2 - Elevator door safety device - Google Patents

Description

  The present invention relates to an elevator door safety device that controls the closing operation of a car door so that it does not hit an obstacle even if a sensor for detecting an obstacle near the entrance of the elevator breaks down.

  In a conventional elevator door safety device, as a sensor for detecting an obstacle in the vicinity of the door, for example, two projectors are arranged on the upper frame of the landing three-way frame, and two light receiving devices are arranged on the vertical frame of the landing three-way frame. A vessel is placed. The detection lights emitted from the two projectors cross each other at the center of the landing entrance and are received by the light receiver. When the detection light is interrupted by an obstacle such as a passenger during the door closing operation, the operation direction of the landing door and the car door is reversed, and the obstacle is prevented from being caught by the door (for example, Patent Document 1). reference).

Japanese Utility Model Publication No. 53-49868 (first page, FIGS. 1 and 2)

However, in the conventional door safety device, no countermeasures are taken against malfunction due to sensor failure. If the sensor fails, it is effective that an obstacle near the elevator entrance is caught in the door when the door is closed. Could not be prevented.

The present invention has been made to solve the above-described problems, and prevents an obstacle near the elevator entrance from being caught in the door during the door closing operation even when the sensor has failed. It is an object of the present invention to provide an elevator door safety device that can be improved in reliability.

An elevator door safety device according to the present invention includes a projector that emits detection light and a light receiver that receives detection light, a sensor that detects an obstacle near the entrance of the elevator, and an alarm that outputs an alarm to passengers Control of the lift of the car and the car, and as a sensor failure, an on failure, which is a failure in which an obstacle detection signal is output by the sensor in the absence of an obstacle, and an obstacle detected by the sensor in the presence of an obstacle An elevator control device that detects an off-fault that is a failure for which no signal is output, and a door control device that controls an elevator door based on an output signal of the elevator control device. If a failure of the sensor before the operation is detected, after outputting a signal for outputting a first alarm informing means, door and door A first signal for a door safety device for an elevator to be outputted to the door control device, the elevator control device, after the alarm the first alarm, before the output of the first signal, already on failure When it is detected, it is further determined whether or not the on-failure continues, and when the off-failure has already been detected, it is further determined whether or not the off-failure continues. If the sensor failure is detected again, the signal for issuing the second alarm is output to the notification means and controlled, and then the first signal is sent to the door control device. output to, when the sensor failure is not detected again, without outputting a signal for alarm the second alarm informing means, characterized in that for outputting a first signal to the door control device And

  According to the elevator door safety device of the present invention, the door control device, when a sensor failure is detected by the elevator control device before the door closing operation, issues a warning by the notification means and then the door control device. Start the closing operation. Therefore, even if the sensor breaks down, it is possible to prevent the door from colliding with an obstacle near the elevator doorway.

Embodiment 1 FIG.
Embodiments of the present invention will be described below with reference to the drawings. The structure which shows the principal part of the door safety device of the elevator of this invention is shown in FIG. In FIG. 1, a car (car room) 11 is provided with a car doorway 12. The car doorway 12 is opened and closed by a pair of car doors 6. An entrance / exit frame 14 is fixed to the edge of the car entrance 12. The entrance / exit frame 14 includes a pair of car entrance / exit pillars 1 extending in the vertical direction, and a car upper plate 2 provided between upper ends of the car entrance / exit pillars 1 and extending horizontally. In FIG. 1, the pair of car doors 6 is shown in a half-open state, and the end portion 13 shows a door closing side end portion (counter door side end portion) of the car door 6.

A light projector 4 for emitting detection light (arrow in the figure) is embedded along the car doorway column 1 in the vicinity of the lower end portion of the side surfaces of the car doorway column 1 facing each other. A pair of light receivers 3 that receive detection light (beam light) from the projector 4 are embedded in the lower surface of the car upper plate 2. These light receivers 3 are arranged in the vicinity of both ends in the width direction of the car doorway 12. As described above, the sensor for detecting the obstacle includes the light projector 4 and the light receiver 3. This sensor detects an obstacle (not shown) near the car doorway column 1 and outputs an obstacle detection signal. Based on the obstacle detection signal, the elevator control device 8 that controls the raising / lowering of the car 11 determines whether an obstacle exists near the car doorway.

  A door motor (not shown) that drives the car door 6 is controlled by a door control device 7. The door control device 7 controls the door opening and closing operations of the car door 6 and a landing door (not shown) that is opened and closed in conjunction with the car door 6.

  The door control device 7 is connected to the elevator control device 8 via a communication line 9. The door opening command signal 21 and the door closing command signal 22 output from the elevator control device 8 are input to the door control device 7. The door control device 7 receives the door opening command signal 21 and the door closing command signal 22 from the elevator control device 8 and starts controlling the door opening operation and the door closing operation.

  An announcement apparatus 10 as a notification means is installed in the car 11. The announcement device 10 issues a warning based on a notification signal output from the elevator control device 8. The warning includes a warning announcement such as a warning announcement, a buzzer sound, and a screen display for notifying a warning / warning.

  The door control device 7 and the elevator control device 8 include a microprocessor (CPU) that performs control calculation, a ROM that stores a CPU calculation program, a RAM that stores CPU calculation data, and an external input / output. It has an interface for performing

  A failure detection program for detecting a sensor failure by inspecting the operation of the sensor is stored in a ROM in the elevator control device 8.

  Next, an example of a sensor failure detection method will be described. FIG. 2 is a flowchart showing an on-failure detection method by the elevator control device 8 of FIG. Here, the on-failure is a failure in which an obstacle detection signal is output by the sensor in the absence of an obstacle.

  The on-failure inspection is performed when the car 11 is in the non-directional / door-closed standby state for a predetermined time. The non-directional state is a state where there is no UP / DN direction by UP / DN call. It can be estimated that there is no passenger in the car 11 in such a state in which the non-directional / door-closed standby state continues to some extent.

  Therefore, the elevator control device 8 first monitors whether or not a non-directional / door-closed standby state has been established (step S1). If it is a non-directional / door-closed standby state, it is confirmed whether or not the state continues for a preset first set time (for example, 10 seconds) (step S2). Here, in this embodiment, it is assumed that the detection light is emitted from the projector 4 even in the non-directional / door-closed standby state.

  When the non-directional / door closed standby state continues for the first set time, it is confirmed whether or not the obstacle detection signal is continuously output for a preset second set time (for example, 1 second) ( Step S3). That is, a state in which the detection light is not normally emitted by the projector 4 or a state in which the detection light is not normally received by the light receiver 3 is detected. When the obstacle detection signal is output for the second set time, it is determined that an on failure has occurred in the sensor, and the failure is detected by the elevator control device 8 (step S4).

  Next, FIG. 3 is a flowchart showing an off-fault detection method by the elevator control device 8 of FIG. Here, the off-failure is a failure in which an obstacle detection signal is not output by the sensor in the presence of an obstacle. The off-fault inspection is carried out while the car 11 is not being opened / closed.

  In the elevator control device 8, it is first confirmed whether or not the car 11 is traveling (step S5). If the vehicle is traveling, the emission of the detection light from the projector 4 is turned off (step S6). Then, it is confirmed whether or not a preset third set time (for example, 0.5 seconds) has elapsed since the projector 4 was turned off (step S7).

  It is confirmed whether or not the sensor is in a non-detection state until the third set time elapses after the projector 4 is turned off (step S8). If the sensor is normal, when only the projector 4 is turned off, the detection light is not received by the light receiver 3, so that the detection light is blocked by the obstacle, and an obstacle detection signal is output. Therefore, if the obstacle is detected during the third set time, it is determined that the sensor is normal, the inspection ends, and the projector 4 is turned on again.

  On the other hand, if the obstacle detection signal is not output even though the projector 4 is turned off, it is confirmed whether or not the non-detection state has continued for a preset fourth set time (for example, 0.2 seconds). (Step S9). When the non-detection state continues for the fourth set time, it is determined that an OFF failure has occurred in the sensor, and the failure is detected by the elevator control device 8 (step S10).

  Next, a door control method when a sensor failure (including the aforementioned on failure and off failure) is detected will be described. FIG. 4 is a flowchart showing a door control method when a sensor failure is detected by the elevator control device 8 of FIG. When the car 11 reaches the destination floor, the elevator controller 8 confirms whether or not a sensor failure has been detected before the door closing operation is started (step S11). If no sensor failure is detected, the elevator control device 8 outputs a second signal for closing the car door 6 to the door control device 7, and the car door 6 is closed by a normal control method. (Step S12).

  If a sensor failure has been detected, the door closing operation is temporarily blocked, and a warning notice before door closing as a first alarm is issued from the alarm device 10 (step S13). The pre-door warning notice includes, for example, the message “The door closes. Please leave the door.” After the pre-door-closing caution announcement is finished, the elevator controller 8 checks again whether or not the sensor has failed (step S14).

  If no sensor failure is detected in the inspection immediately before the door is closed, the car door 6 is closed by a normal control method (step S12). However, if a sensor failure is detected in the second inspection, a door closing warning announcement as a second alarm is issued from the alarm device 10 (step S15). The door closing warning announcement includes, for example, a message “door closes”. Next, it is confirmed whether the door closing warning announcement has been completed (step S16). After the door closing warning announcement is completed, the elevator control device 8 outputs a first signal for closing the car door 6 to the door control device 7 and starts the door closing operation at a speed lower than the normal door closing speed. Is done. At this time, for example, a door closing warning sound such as a buzzer sound or a chime sound is emitted by the alarm device 10 as a third alarm (step S17).

  In such an elevator door safety device, if a sensor failure is detected by the elevator control device 8 before the car door 6 is closed, the alarm device 10 issues an alarm and then starts the door closing operation. Therefore, it is possible to more reliably prevent the car door 6 from colliding with an obstacle due to a sensor failure.

  Further, the elevator control device 8 reconfirms whether or not there is a sensor failure after the end of the first alarm. When the sensor failure is detected again, the elevator control device 8 starts the door closing operation after issuing the second alarm. Thus, the car door 6 can be prevented from colliding with an obstacle more reliably.

Further, after the end of the first alarm, the elevator control device 8 reconfirms the presence or absence of the sensor failure, and when the sensor failure is detected again, the door control device 7 controls the door controlled based on the first signal. Since the door closing operation is started at a speed lower than the door closing speed of the door that controls the door closing speed based on the second signal, the car door 6 can collide with an obstacle more reliably. It can be prevented in advance.
Moreover, even when a sensor failure is detected, the door closing operation is performed, so that it is possible to suppress a decrease in the operation rate of the elevator.

  Furthermore, when a sensor failure is detected again, the door closing operation is started together with an alarm, so that the car door 6 can be more reliably prevented from colliding with an obstacle. .

  Further, the elevator control device 8 determines that a failure has occurred in the sensor when an obstacle is detected by the sensor even though the car is in a non-directional / door-closed standby state. Can be reliably detected.

  In addition, the sensor is installed at the lower part of the car entrance / exit column, and is installed on the upper plate of the car so as to receive the detection light and the light receiving unit that detects the presence or absence of an obstacle depending on the detection light reception state. Therefore, an obstacle near the car doorway can be reliably detected.

  In addition, the elevator control device 8 detects a failure in the sensor when the detection state of the obstacle by the light receiver 3 is not detected even though the emission of the detection light from the projector 4 is stopped while the car is running. Since it is determined that the sensor has occurred, an off failure of the sensor can be reliably detected.

In addition, since the first warning is an announcement for prompting the user to leave the car door 6, the car door 6 can be more reliably prevented from colliding with an obstacle.
In addition, since the second alarm is an announcement that the door closing operation is started, the car door 6 can be more reliably prevented from colliding with an obstacle.

In the above example, the projector 4 is arranged in the car entrance / exit post 1 and the light receiver 3 is arranged in the car upper plate 2. However, the light receiver 3 is arranged in the car entrance / exit column 1 and the projector 4 is arranged in the car upper plate 2. May be arranged.
Further, the sensor is not limited to a cut-off optical sensor. For example, a plurality of reflective optical sensors or known proximity sensors may be arranged in the vertical frame.
Furthermore, although the sensor is arranged on the car side in the above example, it may be arranged near the entrance / exit on the landing side. Thereby, it is possible to prevent the landing door from colliding with an obstacle near the landing entrance.
In addition, with regard to the detection operation of the sensor on-fault described in FIG. 2, it is assumed that there is no passenger in the vicinity of the landing exit by estimating the state in which the non-direction / door-closing standby state of the car has continued to some extent. The operation is the same as that in the case where the sensor is arranged, and the present invention can be applied to the sensor arranged on the boarding side.
Further, the off-fault detection operation described with reference to FIG. 3 is the same as the case where the sensor is arranged on the car side, and can be applied to the sensor arranged on the boarding side.
Furthermore, in the above example, the center opening type door device is shown, but the present invention can also be applied to a single opening type door device.

In addition, the on-failure inspection may be performed every time the non-directional / door-closed standby state is entered, but may not necessarily be performed every time.
Furthermore, the off-fault inspection may be performed every time the car travels, but may not necessarily be performed every time.

It is a block diagram which shows the principal part of the door control apparatus of the elevator by an example of embodiment of this invention. It is a flowchart which shows the on failure detection method by the elevator control apparatus of FIG. It is a flowchart which shows the off failure detection method by the elevator control apparatus of FIG. 3 is a flowchart for explaining a control operation according to the first embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Car entrance / exit pillar, 2 Car top plate, 3 Light receiver, 4 Light projector, 5 Beam light, 6 Car door, 7 Door control device, 8 Elevator control device, 9 Communication line, 10 Alarm device, 11 Car, 12 Car entrance, 13 Door closing side end (end door side end), 14 Car doorway frame.

Claims (8)

A projector that emits detection light and a light receiver that receives the detection light; and a sensor that detects an obstacle in the vicinity of an elevator entrance;
An informing means for outputting an alarm to passengers;
Ascending / descending of the car is controlled, and as the failure of the sensor, an on failure, which is a failure in which an obstacle detection signal is output by the sensor in the absence of an obstacle, and an obstacle detected by the sensor in the presence of an obstacle An elevator controller for detecting an off-fault that is a fault for which no signal is output ;
A door control device for controlling the door of the elevator door based on the output signal of the elevator control device;
The elevator control device includes:
When a failure of the sensor is detected before the closing operation of the door, a signal for outputting a first alarm is output to the notification means, and then a first for closing the door An elevator door safety device for outputting a signal to the door control device,
When the on-failure has already been detected after the first alarm is issued and before the output of the first signal, the elevator control device determines whether or not the on-failure continues. Determining, when an off-failure has already been detected, by further determining whether or not the off-state continues , re-check the presence or absence of the sensor failure,
When a failure of the sensor is detected again, a signal for issuing a second alarm is output and controlled to the notification means, and then the first signal is output to the door control device,
When the failure of the sensor is not detected again, the first signal is output to the door control device without outputting a signal for issuing a second alarm to the notification means. Elevator door safety device.   The door control device outputs the door closing speed controlled based on the first signal from the elevator control device to close the door when the sensor failure is not detected. 2. The elevator door safety device according to claim 1, wherein the door safety control is performed at a speed lower than a door closing speed controlled based on a signal of 2.   The elevator control device, after issuing the second alarm, outputs and controls a signal for issuing a third alarm that is issued together with the door closing operation of the door to the notification means. The elevator door safety device according to claim 1, wherein the elevator door safety device is an elevator door safety device.   The elevator control device determines that a failure has occurred in the sensor when an obstacle is detected by the sensor even though the car is in a non-directional / door-closed standby state. Item 4. The elevator door safety device according to any one of Items 1 to 3. The sensor is
A projector installed at a lower portion of the car doorway column and emitting detection light;
The elevator according to claim 1, further comprising: a light receiver that is installed on a car upper plate so as to receive the detection light and detects the presence or absence of the obstacle according to a light reception state of the detection light. Door safety device.   The elevator control device stops emission of the detection light from the projector while the car is running when it is determined that there is an obstacle in the vicinity of the car entrance when the detection light is not received by the light receiver. 6. The elevator door safety device according to claim 5, wherein if the obstacle detection state by the light receiver is not detected, it is determined that a failure has occurred in the sensor. 7.   The elevator door safety device according to any one of claims 1 to 6, wherein the first warning is an announcement for prompting the user to leave the door.   The elevator door safety device according to any one of claims 1 to 7, wherein the second warning is an announcement that the door closing operation is started.

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