JP2007168951A - Pulling-in prevention device for elevator door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pulling-in prevention device for an elevator door having a photoelectric device only in a car to simplify the device. <P>SOLUTION: This pulling-in prevention device for the elevator door is provided with a projector 2 provided in the upper side of the car 20 and emitting light signals; a reflecting plate 3 provided in the lower side of the car 20 and reflecting the light signals passing between the car 20 and a car side door 21; a reflecting plate 4 provided on a landing floor 12 and reflecting the light signals reflected by the reflecting plate 3; a reflecting plate 5 which is provided on a landing ceiling 13 and reflects the light signals reflected by the reflecting plate 4 and passing between a landing 10 and a landing side door 11; a photo detector 6 provided in the upper side of the car 20 and receiving the light signals reflected by the reflecting plate 5; and a door control device 1 preventing opening/closing operation of the landing side door 11 and the car side door 21 when the light signals emitted from the projector 2 are not received by the photo detector 6 at the time of landing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an elevator door pull-in prevention device that can detect pull-in on both a landing side and a car side by a plurality of reflectors and a photoelectric device installed in the car.

  In a conventional elevator door pull-in prevention device, when a pull-in is detected by a photoelectric device provided on the landing side, it is once pulled into a control device by serial communication and the detection is transmitted. Thereafter, a detection signal is sent from the control device to the door opening / closing device to perform door opening / closing control (see, for example, Patent Document 1).

JP 2005-132564 A

  The conventional elevator door retract prevention device as described above has a problem in that the device becomes complicated because a photoelectric device must be provided for each landing on each floor.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an anti-retraction device for an elevator door that can be provided with a photoelectric device only in a car and can be simplified. is there.

  An elevator door pull-in prevention device according to the present invention is provided in a car, and is provided at a position facing the first light-emitting means of the car, the first light-emitting means for emitting an optical signal, and the car A first reflector that reflects the optical signal passing between the doors on the side, a second reflector that is provided on a landing floor and reflects the optical signal reflected by the first reflector, and a landing A third reflector provided on the ceiling and reflected by the second reflector and reflecting the optical signal passing between the landing and the landing-side door; and the third reflector provided on the car. A light receiving means for receiving the light signal reflected by the vehicle, and the landing side door and the car side door when the light receiving means does not receive the light signal emitted from the first light emitting means when landing. Door control means that does not open or close the door Those digits.

  The elevator door retracting prevention device according to the present invention suffices if the photoelectric device is provided only in the car, so that the device can be simplified.

Embodiment 1 FIG.
An elevator door retract prevention device according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a side view of the configuration of an elevator door retracting prevention device according to Embodiment 1 of the present invention. In addition, in each figure, the same code | symbol shows the same or equivalent part.

  In FIG. 1, the elevator door retract-in prevention device according to the first embodiment includes a door control device (door control means) 1 installed on the upper side of the car 20, and a photoelectric device attached on the upper side of the car 20. Reflection of a projector (first light emitting means) 2, a reflector (first reflector) 3 such as a mirror attached to the lower side of the car 20, and a mirror attached to a landing floor 12 on the landing 10 side A plate (second reflecting plate) 4, a reflecting plate (third reflecting plate) 5 such as a mirror attached to the landing ceiling 13 on the landing 10 side, and a photoreceiver of a photoelectric device attached to the upper side of the car 20 (Light receiving means) 6 is provided.

  The projector 2 to the light receiver 6 are provided on the retracting side of the door. For example, in the case of a single door, the light projector 2 to the light receiver 6 are provided at the end on the side where the door is opened and stored. Further, in the case of two double doors, the projector 2 to the light receiver 6 are provided at both ends on the side where the door is opened and stored.

  The reflecting plate 4 attached to the landing floor 12 on the landing 10 side and the reflecting plate 5 attached to the landing ceiling 13 on the landing 10 side are provided for each landing on each floor.

  Next, the operation of the elevator door retract prevention device according to the first embodiment will be described with reference to the drawings.

  In the elevator door retract prevention device configured as described above, the projector 2 of the photoelectric device emits an optical signal downward in the vertical direction in response to a command from the door control device 1 when landing. This optical signal passes through the car between the car 20 and the car-side door 21 and reaches the reflector 3 on the lower side of the car 20. Next, an optical signal directed to the reflecting plate 4 is turned 90 degrees horizontally by the reflecting plate 3.

  Further, the optical signal is again turned 90 degrees upward in the vertical direction by the reflecting plate 4, passes between the landing 10 and the landing-side door 11, and proceeds toward the reflecting plate 5. Finally, the optical signal that is turned 90 degrees horizontally by the reflector 5 reaches the light receiver 6 of the photoelectric device. The light receiver 6 sends a light reception signal to the door control device 1, and the door control device 1 outputs a door opening / closing command to a door opening / closing device (not shown) so that the door opening / closing operation is performed. A normal opening / closing operation of the door 21 is performed.

  If the optical signal is blocked by foreign matter such as a passenger's hand on the landing 10 side or the car 20 side and the light reception signal of the light receiver 6 is not sent to the door control device 1, the door control device 1 does not perform the opening / closing operation.

  In other words, since a set of photoelectric devices attached to the car 20 side can detect the pull-in of both the landing 10 side and the car 20 side, it is not necessary to install a prevention device for each landing on each floor. Can be reduced.

  In FIG. 1, the positions of the projector 2 and the light receiver 6 may be reversed, and the optical signal may be in the opposite direction to the path shown in FIG. That is, the path of the optical signal may be the light projector 2 → the reflection plate 5 → the reflection plate 4 → the reflection plate 3 → the light receiver 6.

  In FIG. 1, the projector 2 and the light receiver 6 may be installed below the car 20, and the reflector 3 may be installed above the car 20. When the projector 2 is installed so as to be able to emit light toward the reflector 4, and the light receiver 6 is installed so as to be able to receive an optical signal passing between the car 20 and the car side door 21 from the reflector 3, The path is as follows: projector 2 → reflecting plate 4 → reflecting plate 5 → reflecting plate 3 → receiver 6. Further, the positions of the projector 2 and the light receiver 6 may be reversed, and the optical signal path may be reversed, and the optical signal path is as follows: the light projector 2 → the reflector 3 → the reflector 5 → the reflector 4 → the light receiver 6. It becomes.

Embodiment 2. FIG.
An elevator door retracting prevention device according to Embodiment 2 of the present invention will be described with reference to FIGS. FIG. 2: is the figure which looked at the structure of the retractor prevention apparatus of the elevator door which concerns on Embodiment 2 of this invention from the side.

  In the first embodiment, the photoelectric device is turned on / off at the time of landing to detect an object near the landing-side door 11 and the car-side door 21 to prevent the pull-in. Cannot detect whether an object such as a passenger's hand is detected or the photoelectric device is broken. Therefore, in the second embodiment, failure diagnosis of the photoelectric device or the like is performed.

  In FIG. 2, the projector (second light emitting means) 7 of the photoelectric device is attached between the floors. When the car 20 starts running, the projector 7 is caused to emit light by the control panel 100, and the car 20 breaks down while the car 20 is running. When the optical receiver 6 detects the diagnostic optical signal, it is possible to diagnose an OFF / ON failure of the optical receiver 6. Information such as the timing at which the projector 7 is caused to emit light by the control panel 100 is transmitted to the door control device 1.

  The projector 7 may be provided between one floor, or may be provided between a plurality of floors or every floor. For example, the projector 7 may be provided between the first floor and the second floor, or may be provided at two places between the first floor and the second floor and between the top floor and the floor one floor below the top floor. .

  Next, the operation of the elevator door retracting prevention device according to the second embodiment will be described with reference to the drawings. FIG. 3 is a timing chart showing a failure diagnosis operation of the photoelectric device of the elevator door retract prevention device according to Embodiment 2 of the present invention.

  When the failure diagnosis of the light receiver 6 is normal, as shown in FIGS. 3A1 to 3A5, the control panel 100 causes the light projector 7 to emit light (ON) while the car 20 is traveling. When the light receiver 6 receives (ON) the failure diagnosis light signal from the projector 7 based on the position information from the control panel 100 at the timing when the car 20 passes through the position where the projector 7 is installed, the door control device 1 diagnoses that the light receiver 6 is normal. As a result, the door control device 1 does not transmit a failure detection signal (low level) to the remote monitoring device 101. Further, the remote monitoring device 101 does not issue a sensor failure notification (low level) to the information center 200.

  At the time of OFF failure, as shown in FIGS. 3B1 to 3B6, the control panel 100 causes the light projector 7 to emit light (ON) while the car 20 is traveling. If the light receiver 6 does not receive (OFF) the failure diagnosis optical signal from the light projector 7 at the timing when the car 20 passes through the position where the light projector 7 is installed, the door control device 1 indicates that the light receiver 6 is in an OFF failure. Diagnose it. As a result, the door control device 1 transmits a failure detection signal (high level) to the remote monitoring device 101. At the same time, the door control device 1 outputs a low-speed door opening / closing command to a door opening / closing device (not shown) so as to perform a low-speed door opening / closing operation, thereby controlling the landing-side door 11 and the car-side door 21. Further, the remote monitoring apparatus 101 issues a sensor failure notification (high level) to the information center 200.

  When the ON failure occurs, as shown in FIGS. 3C1 to C6, the control panel 100 causes the light projector 7 to emit light (ON) while the car 20 is traveling. When the light receiver 6 receives the optical signal for failure diagnosis from the projector 7 immediately after the start of travel (ON) (receives (ON) at a timing other than the timing when the car 20 passes through the position where the projector 7 is installed), the door The control device 1 diagnoses that the light receiver 6 has an ON failure. As a result, the door control device 1 transmits a failure detection signal (high level) to the remote monitoring device 101. At the same time, the door control device 1 outputs a low-speed door opening / closing command to a door opening / closing device (not shown) so as to perform a low-speed door opening / closing operation, thereby controlling the landing-side door 11 and the car-side door 21. Further, the remote monitoring apparatus 101 issues a sensor failure notification (high level) to the information center 200.

  As described above, when detecting an OFF / ON failure of the photoelectric device, the door control device 1 issues a low-speed door opening / closing command (FIG. 3 (B5), (C5)) so as to perform a low-speed door opening / closing operation. (Not shown) to control the landing-side door 11 and the car-side door 21 and simultaneously transmit a failure detection signal (FIG. 3 (B4), (C4)) to the remote monitoring device 101. Then, the remote monitoring apparatus 101 can notify the information center 200 that a failure has occurred as a sensor failure notification (FIG. 3 (B6), (C6)).

  FIG. 4 is a timing chart showing the deterioration diagnosis operation of the photoelectric device of the elevator door retract prevention device according to Embodiment 2 of the present invention.

  When the deterioration diagnosis of the light receiver 6 is normal, as shown in FIGS. 4A1 to 4A4, the control panel 100 causes the light projector 7 to emit light (ON) while the car 20 is traveling. Based on the positional information from the control panel 100, the light receiver 6 exceeds the reference value at the timing when the car 20 passes the position where the light projector 7 is installed based on the positional information from the control panel 100 (above the reference value). When the light is received (ON) at the level, the door control device 1 diagnoses that the light receiver 6 is normal. As a result, the door control device 1 does not transmit a deterioration detection signal (low level) to the remote monitoring device 101. In addition, the remote monitoring device 101 does not issue a sensor deterioration notification (low level) to the information center 200.

  When the deterioration is detected, as shown in FIGS. 4B1 to 4B5, the control panel 100 causes the projector 7 to emit light (ON) while the car 20 is traveling. When the light receiver 6 receives the failure diagnosis light signal from the light projector 7 at the timing when the car 20 passes through the position where the light projector 7 is installed at a level lower than the reference value (less than the reference value) (ON), the door The control device 1 diagnoses that the light receiver 6 has deteriorated. As a result, the door control device 1 transmits a deterioration detection signal (high level) to the remote monitoring device 101. At the same time, the door control device 1 outputs a low-speed door opening / closing command to a door opening / closing device (not shown) so as to perform a low-speed door opening / closing operation, thereby controlling the landing-side door 11 and the car-side door 21. Further, the remote monitoring device 101 issues a sensor deterioration notification (high level) to the information center 200.

  As described above, the deterioration diagnosis of the photoelectric device can be performed by monitoring the light reception level of the light receiver 6 during the OFF / ON failure diagnosis of the photoelectric device. That is, when the light reception level falls below a certain reference value, the deterioration of the light receiver 6 is detected (FIG. 4 (B2)), and the door control device 1 performs control so that the low-speed door opening / closing operation is performed (FIG. 4 (B4)). )), A deterioration detection signal (FIG. 4 (B3)) can be transmitted to the remote monitoring apparatus 101, and the sensor deterioration notification (FIG. 4 (B5)) can be issued to the information center 200.

  FIG. 5 is a timing chart showing the dirt diagnosis operation of the reflector of the elevator door retract prevention device according to Embodiment 2 of the present invention.

  When the dirt diagnosis of the reflectors 3 to 5 is normal, as shown in FIGS. 5A1 to 5A6, the door control device 1 stores in the memory the light reception level at the time of deterioration diagnosis of the light receiver 6 performed during traveling. It is stored and compared with the light reception level at the time of failure diagnosis of the light receiver 6 performed at the time of landing. When the level difference between the two is below the reference value (less than the reference value), the door control device 1 diagnoses that the reflectors 3 to 5 are normal. As a result, the door control device 1 does not transmit a dirt detection signal (low level) to the remote monitoring device 101. At the same time, the door control device 1 does not output a low-speed door opening / closing command (low level) to the door opening / closing device (not shown). In addition, the remote monitoring device 101 does not report the information center 200 as a reflection plate contamination report (low level). The light emission intensity of the projectors 2 and 7 is the same. Further, when the dirt diagnosis is not performed, the light emission intensities of the projectors 2 and 7 may be different.

  When the dirt is detected, as shown in FIGS. 5 (B1) to (B6), the door control device 1 stores in the memory the light reception level at the time of deterioration diagnosis of the light receiver 6 performed during traveling, and the light receiver performed at the time of landing. 6 is compared with the light reception level at the time of failure diagnosis. When the level difference between the two exceeds the reference value (greater than the reference value), the door control device 1 diagnoses that at least one of the reflectors 3 to 5 is dirty. As a result, the door control device 1 transmits a dirt detection signal (high level) to the remote monitoring device 101. At the same time, the door control device 1 outputs a low-speed door opening / closing command (high level) to the door opening / closing device (not shown) so as to perform a low-speed door opening / closing operation, thereby controlling the landing-side door 11 and the car-side door 21. Further, the remote monitoring apparatus 101 issues a reflector contamination notification (high level) to the information center 200.

  As described above, it is possible to diagnose the degree of contamination of the reflectors 3 to 5 by monitoring the light reception level of the light receiver 6 at the time of landing and comparing it with the light reception level at the time of diagnosis of deterioration of the photoelectric device during traveling. it can. In other words, when the level difference between the light reception level at the time of degradation diagnosis and the light reception level of the light receiver 6 at the time of landing exceeds a certain reference value, it is detected that all or any of the reflectors 3 to 5 is dirty. (FIG. 5 (B3)), the door control device 1 controls the door to open and close at a low speed (FIG. 5 (B5)), and transmits a dirt detection signal (FIG. 5 (B4)) to the remote monitoring device 101. The information center 200 can report that the reflector is dirty as a reflector dirty report (FIG. 5 (B6)).

  In addition, this Embodiment 2 is a case where the light receiver 6 is attached to the lower side of the car 20 and toward the landing 10 side in the modification of the above-described Embodiment 1, and the projector 7 The present invention can also be applied to the case where the optical signal for failure diagnosis from can be received.

It is the figure which looked at the structure of the retractor prevention apparatus of the elevator door which concerns on Embodiment 1 of this invention from the side. It is the figure which looked at the structure of the retracting prevention apparatus of the elevator door which concerns on Embodiment 2 of this invention from the side surface. It is a timing chart which shows the failure diagnosis operation | movement of the photoelectric device of the retractor prevention apparatus of the elevator door which concerns on Embodiment 2 of this invention. It is a timing chart which shows the deterioration diagnosis operation | movement of the photoelectric device of the retractor prevention apparatus of the elevator door which concerns on Embodiment 2 of this invention. It is a timing chart which shows the stain | pollution | contamination diagnostic operation | movement of the reflecting plate of the elevator door drawing-in prevention apparatus which concerns on Embodiment 2 of this invention.

Explanation of symbols

1 door control device, 2 projector, 3 reflector, 4 reflector, 5 reflector, 6 light receiver, 7 projector, 10 landing, 11 landing side door, 12 landing floor, 13 landing ceiling, 20 car, 21 car side door , 100 control panel, 101 remote monitoring device, 200 information center.

Claims (7)

A first light emitting means provided in the car for emitting an optical signal;
A first reflector that is provided at a position facing the first light emitting means of the car and reflects the optical signal passing between the car and the car-side door;
A second reflector that is provided on a landing floor and reflects the optical signal reflected by the first reflector;
A third reflecting plate provided on a landing ceiling, reflected by the second reflecting plate, and reflecting the optical signal passing between the landing and the landing side door;
A light receiving means that is provided in the cage and receives the optical signal reflected by the third reflector;
A door control unit that does not open and close the landing side door and the car side door when the light receiving unit does not receive an optical signal emitted from the first light emitting unit when landing. An elevator door retract prevention device characterized by A second light emitting means provided between the floors and emitting a failure diagnosis optical signal;
A control panel for causing the second light emitting means to emit light while the car is running,
The door control means, when the light receiving means does not receive the failure diagnosis optical signal from the second light emitting means at the timing when the car passes through the position where the second light emitting means is installed, 2. The elevator door retract prevention device according to claim 1, wherein a diagnosis is made as a failure of the light receiving means, and the landing side door and the car side door are controlled to open and close at a low speed door. The door control means, when the light receiving means receives a failure diagnosis optical signal from the second light emitting means at a timing when a car passes through a position where the second light emitting means is installed, When the light receiving level of the optical signal for failure diagnosis is less than a reference value, it is diagnosed that the light receiving means is deteriorated, and the landing-side door and the car-side door are controlled to perform a low-speed door opening / closing operation. The elevator door retracting prevention device according to claim 2. The door control means receives the failure diagnosis light signal from the second light emitting means at a timing when a car passes through a position where the second light emitting means is installed. When the difference between the light reception level of the optical signal and the light reception level of the optical signal from the first light emitting means received by the light receiving means when landing is equal to or greater than a reference value, the first, second and third reflections 3. The elevator door retract prevention device according to claim 2, wherein at least one of the plates is diagnosed as being dirty, and the landing-side door and the car-side door are controlled to open and close at a low speed door. A first light emitting means provided in the car for emitting an optical signal;
A third reflector provided on a landing ceiling for reflecting the optical signal emitted by the first light emitting means;
A second reflector that is provided on a landing floor, is reflected by the third reflector, and reflects the optical signal passing between the landing and the landing-side door;
A first reflector that is provided at a position of the car facing the first light emitting means and reflects the optical signal reflected by the second reflector;
A light receiving means for receiving the optical signal provided on the car, reflected by the first reflector and passing between the car and the car side door;
A door control unit that does not open and close the landing side door and the car side door when the light receiving unit does not receive an optical signal emitted from the first light emitting unit when landing. An elevator door retract prevention device characterized by A first light emitting means provided in the car for emitting an optical signal;
A second reflector that is provided on the landing floor and reflects the optical signal;
A third reflecting plate provided on a landing ceiling, reflected by the second reflecting plate, and reflecting the optical signal passing between the landing and the landing side door;
A first reflecting plate provided at a position facing the first light emitting means of the car and reflecting the optical signal reflected by the third reflecting plate;
A light receiving means for receiving the optical signal provided on the car, reflected by the first reflector and passing between the car and the car side door;
A door control unit that does not open and close the landing side door and the car side door when the light receiving unit does not receive an optical signal emitted from the first light emitting unit when landing. An elevator door retract prevention device characterized by A first light emitting means provided in the car for emitting an optical signal;
A first reflector that is provided at a position facing the first light emitting means of the car and reflects the optical signal passing between the car and the car-side door;
A third reflector provided on a landing ceiling and reflecting the optical signal reflected by the first reflector;
A second reflector that is provided on a landing floor, is reflected by the third reflector, and reflects the optical signal passing between the landing and the landing-side door;
A light receiving means that is provided in the cage and receives the optical signal reflected by the second reflecting plate;
A door control unit that does not open and close the landing side door and the car side door when the light receiving unit does not receive an optical signal emitted from the first light emitting unit when landing. An elevator door retract prevention device characterized by

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