JP2014177313A - Abnormality diagnostic device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine whether a shield plate bites into a photoelectric sensor by a proper quantity in addition to a function of detecting an elevator car position by blocking one of a plurality of optical axes of the photoelectric sensor by the shield plate.SOLUTION: An abnormality diagnostic device includes determination means of determining whether a landing position of an elevator car is proper based upon the output of a photoelectric sensor 3 comprising a plurality of light projection parts, optical axes, and light reception parts, and a shield plate biting quantity determination means of determining the quantity of biting of the shield plate into the photoelectric sensor 3. The shield plate 4 is provided with cut pars 41, 42 which detect the quantity of biting of the shield plate into the photoelectric sensor 3 in regions different from recessed parts 43, 44 for elevator-car position detection so as to determine abnormality of the quantity of biting based upon output change of the photoelectric sensor 3.

Description

  The present invention relates to an elevator abnormality diagnosis device capable of detecting a positional deviation between a car position detection photoelectric sensor mounted on an elevator car and a car position detection shield provided in a hoistway. About.

  Conventionally, in order to detect a car position whether or not the stop position of the car is appropriate at each floor where the elevator car stops, a plurality of photoelectric sensors and a plurality of optical axes of the sensor are cut off. A car position detecting device using a shielding plate provided with a notch has been used. For example, Patent Document 1 discloses a technique in which not only information on the appropriate position of the car and the deviation from the car on the shielding plate but also other information is added. According to Patent Document 1, a plurality of photoelectric sensors that irradiate a plurality of optical axes are provided in a car, and a plurality of shielding plates that are provided with a plurality of cutouts at predetermined positions facing the photoelectric sensors are provided in the elevator ascending / descending direction. The car position is detected by detecting a change in the output from the photoelectric sensor.

JP 2006-188319 A

  The prior art disclosed in the above-mentioned Patent Document 1 incorporates position information in the shape of the shielding plate, and grasps the absolute position of the car from a specific signal detected by a photoelectric sensor mounted on the car.

  However, the amount of biting of the shielding plate across the plurality of optical axes of the photoelectric sensor may deviate from the design value, and not only the absolute position information of the floor as shown in Patent Document 1, but also the car In order to detect whether or not the correct position information cannot be read even with the shielding plate that determines the deviation from the appropriate position, or whether the amount of biting is appropriate with the current shielding plate The problem that it is necessary arises.

  The present invention is for solving the problems in the prior art, and its purpose is to provide a plurality of functions in addition to a function as a shielding plate for detecting a car position by blocking any of a plurality of optical axes of a photoelectric sensor. An object of the present invention is to provide an elevator abnormality diagnosing device having a function capable of determining whether or not the amount of the shielding plate crossing the optical axis to the photoelectric sensor is appropriate.

In order to solve the above problems, the present invention mainly adopts the following configuration.
A plurality of light emitting units that emit light and a plurality of light receiving units that receive light from the plurality of light projecting units are arranged to face each other, and a photoelectric sensor that outputs a light receiving state of each of the plurality of light receiving units is mounted. Mounted on the car, and when the car is positioned at the proper stop position of the car on each floor, a shading plate for car position detection that shields between the light emitting part and the light receiving part of the photoelectric sensor Based on the output of the photoelectric sensor shielded by the shielding plate, whether or not the vehicle is in an appropriate stop position on the floor where the car stops is determined based on the combination of the light receiving states of the light receiving unit. In the elevator provided with the judging means for judging whether or not the landing position of the car is appropriate, the shielding plate has a position different from the concave portion for detecting the position of the car at the position corresponding to the photoelectric sensor. A notch for detecting a biting amount of the shield plate is provided, and when the car passes through the shield plate, a plurality of the light receptions based on an output change of the photoelectric sensor due to the notch And a shielding plate biting amount judging means for judging a biting amount of the shielding plate detected by the photoelectric sensor with respect to the photoelectric sensor based on a combination of light receiving states of the parts.

  ADVANTAGE OF THE INVENTION According to this invention, it can be detected whether the amount of biting of the photoelectric sensor attached to the shielding board installed in the predetermined position of each floor and the car is appropriate.

It is a figure which shows arrangement | positioning of the photoelectric sensor installed in the passenger car in the abnormality diagnosis apparatus of the elevator which concerns on embodiment of this invention, and the shielding board installed in the hoistway. It is a figure which shows the structure of the photoelectric sensor for the car position detection used in the abnormality diagnosis apparatus of the elevator which concerns on this embodiment. It is a figure which shows the example of 1 structure of the shielding board for the cage position detection used in the abnormality diagnosis apparatus of the elevator which concerns on this embodiment. It is a figure which shows the other structural example of the shielding board for the cage position detection used in the abnormality diagnosis apparatus of the elevator which concerns on this embodiment. 1 is a block diagram illustrating an overall configuration of an elevator abnormality diagnosis apparatus according to the present embodiment. It is a figure for demonstrating how it is judged from the output signal of a photoelectric sensor whether it is the suitable stop position of the car by the shielding board and photoelectric sensor in this embodiment. It is a figure explaining abnormality detection with the case where the biting to the photoelectric sensor by one composition example of the shielding board concerning this embodiment is shallow, and when it is deep. It is a figure explaining abnormality detection with the case where the biting to the photoelectric sensor by other composition examples of the shielding board concerning this embodiment is shallow, and when it is deep.

  An elevator abnormality diagnosis apparatus according to an embodiment of the present invention will be described below with reference to the drawings. In the drawings, 1 is a hoistway, 2 is a car, 3 is a photoelectric sensor, 4 is a shielding plate, 6 is a sensor signal judging means, 7 is a car shielding plate passing floor detecting means, and 8 is a judging amount of the shielding plate biting. Means, 9 is a display, 10 is an abnormality reporting means, 11 is a monitoring center, 12 is a confirmation instruction means, 31, 32 and 33 are light receiving parts, 35, 36 and 37 are light projecting parts, and 41 and 42 are bitten. Notch portions for detecting the amount, 43 and 44 are notch portions (concave portions) for position detection, 48 is a normal shielding plate, 51 and 52 are biting amount detecting portions, and 61, 62 and 63 are optical axes. Represent each.

  FIG. 1 is a diagram showing an arrangement of photoelectric sensors installed in a car and a shielding plate installed in a hoistway in an elevator abnormality diagnosis apparatus according to an embodiment of the present invention. In FIG. 1, the elevator abnormality diagnosis apparatus of the present embodiment is a photoelectric sensor that irradiates a plurality of optical axes 61, 62, 63 (shown in FIG. 2) mounted on a car 2 that moves up and down in a hoistway 1. 3 and a position detection shielding plate 4 that shields between the light projecting part and the light receiving part of the photoelectric sensor 3 when the car 2 is positioned at an appropriate stop position of the car 2 on each floor. ing.

  FIG. 2 shows the configuration of the photoelectric sensor 3 used in the present embodiment, which is projected from each of a plurality of light projecting units 35, 36, and 37 that emit light and a plurality of light projecting units 35, 36, and 37. Optical axes 61, 62, and 63 representing the optical axes of the light and light receiving sections 31, 32, and 33 that receive light from the plurality of light projecting sections 35, 36, and 37, respectively. The plurality of light projecting units 35, 36, and 37 and the plurality of light receiving units 31, 32, and 33 are arranged so as to face each other, and the light receiving state of each of the plurality of light receiving units 31, 32, and 33 is determined from the photoelectric sensor 3. It is designed to output.

  FIG. 3 shows an example of the configuration of a car position detecting shield used in the present embodiment, and the photoelectric sensor 3 and the shielding board 4 are provided by providing notches 41 and 42 in the shape of a normal shielding board 48. And a horizontal biting amount detecting portion. The shielding plate 48 is formed with recesses 43 and 44 which are notches for detecting the position of the car. The function of the notches 41 and 42 for detecting the biting amount will be described later with reference to FIG. Here, the shielding plate 4 has a shape provided with cutout portions 41 and 42, and the position of the cutout portion does not hinder the detection of the position of the car 2 during normal elevator operation. And a portion that can be detected before the biting amount of the photoelectric sensor 3 becomes abnormal.

  FIG. 4 shows another configuration example of the shielding plate for detecting the car position used in the present embodiment, and the biting amount detection units 51 and 52 are provided in the illustrated position in the shape of the normal shielding plate 48, A detection unit for the amount of biting in the horizontal direction between the photoelectric sensor 3 and the shielding plate 4 is formed. The functions of the biting amount detection units 51 and 52 will be described later with reference to FIG.

  FIG. 5 is a block diagram showing the overall configuration of the elevator abnormality diagnosis apparatus according to the embodiment of the present invention. 5, the elevator abnormality diagnosis apparatus according to this embodiment includes a photoelectric sensor 3 mounted on a car 2 that moves up and down in the hoistway 1 and a car 2 at an appropriate stop position of the car 2 on each floor. Is positioned in the hoistway 1, the plurality of light projecting units 35, 36, 37 arranged opposite to each other in the photoelectric sensor 3, and the optical axes 61, 62 between the plurality of light receiving units 31, 32, 33. , 63 based on the position detection shielding plate 4 (shown in FIG. 1) and the output of the photoelectric sensor 3 showing the shielding states of the optical axes 61, 62, 63 by the shielding plate 4, respectively. , 32, 33 based on the combination of the light receiving states, the sensor signal judging means 6 for judging whether or not the landing position of the car 2 is appropriate, and the car using an encoder signal provided in an elevator hoisting machine or the like Detect current position in 2 hoistways And a shielding plate biting amount judging means 8 for judging whether or not the biting amount of the shielding plate 4 and the photoelectric sensor 3 is appropriate based on a signal from the sensor signal judging means 6. Then, an abnormality issuing means for notifying the monitoring center 11 of an abnormality in the amount of engagement of the shielding plate by the indicator 9 and the amount of engagement determination of the shielding plate 4 and the photoelectric sensor 3 by the shielding plate engagement amount determination means 8. 10, a monitoring center 11, and confirmation instruction means 12 for issuing a confirmation instruction to a maintenance worker on the next inspection date from the abnormality data received by the monitoring center 11. In this embodiment, the shielding plate biting amount determination means 8 determines that the biting amount of the shielding plate 4 and the photoelectric sensor 3 is not appropriate when the signal of the sensor signal determination means 6 determines that the biting amount is not appropriate. It is judged from the signal of the car shielding board passage floor detection means 7 what floor the determined shielding board 4 is, and the floor information and information that the biting amount is not appropriate are displayed on the display 9 and the bite. Output to the error amount reporting means 10.

  FIG. 6 is a diagram for explaining how to determine from the output signal of the photoelectric sensor whether or not it is the proper stop position of the car by the shielding plate and the photoelectric sensor in the present embodiment. Therefore, here, the description of the notch portions 41 and 42 for detecting the biting amount and the biting amount detecting portions 51 and 52 is omitted in the shielding plate 48, and the photoelectric sensor 3 passes through the shielding plate 48. Taking the output signal as an example, the procedure for detecting the position of the car 2 will be described below.

  As shown in the upper diagram of FIG. 6, for example, when the car 2 is running from the top floor to the second floor and stopped while the biting state is normal, the second floor where the car 2 is stopped at the appropriate stop position. The output signals of the light receiving units 31, 32, and 33 of the photoelectric sensor 3 when stopped are “ON / ON / ON” as in the state B. Here, in the state B, the optical axes 61, 62, and 63 shown in FIG. 2 are actually shielded by the shielding plate 48, but the output signals from the light receiving units 31, 32, and 33 are inverted to turn on. It adopts a configuration to do. In this way, when the light is shielded, the light receiving unit is kept on even though the photoelectric sensor 3 does not pass through the shielding plate 48 to detect a failure of the light receiving unit. it can.

  Next, when a passenger enters the car 2, the rope that hangs the car 2 extends, and the floor of the car 2 moves to a position lower than the hall floor position. At this time, the output signals from the light receiving portions 31, 32, 33 of the photoelectric sensor 3 are "ON / OFF / ON" as in the state C, and the floor of the car 2 is lower than the hall floor by the light receiving portion signal 32. And the elevator can cause the car 2 to be brought into the state B so as to be in the state B (in order to make the height of the car floor coincide with the height of the hall floor in preparation for the next passenger boarding, etc.) ). In addition, after the passenger car 2 has landed on the second floor and the passenger has descended, the rope contracts and the floor of the passenger car 2 moves to a position higher than the hall floor position. At this time, the output signals of the light receiving portions 31, 32, 33 of the photoelectric sensor 3 are "ON / ON / OFF" as in the state A, and the floor of the car 2 is positioned higher than the hall floor by the output signal of the light receiving portion 33. And the elevator can cause the car 2 to be brought into the state B so as to be in the state B (in order to make the height of the car floor coincide with the height of the hall floor in preparation for the next passenger boarding, etc.) ).

  Subsequently, when the amount of biting between the shielding plate 48 and the photoelectric sensor 3 is shallow (as shown in the middle diagram of FIG. 6, when the amount of horizontal overlap between the shielding plate 48 and the photoelectric sensor 3 is less than the appropriate value) ). When the car is at the appropriate stop position, the output signals from the light receiving portions 31, 32, 33 of the photoelectric sensor 3 when the second floor is stopped are "ON / ON / ON" as in the state B. However, when the passenger enters the car 2 and the rope that hangs the car 2 extends and the floor of the car 2 moves to a position lower than the hall floor position, the outputs of the light receiving portions 31, 32, and 33 of the photoelectric sensor 3 are output. The signal is “ON / ON / ON” as in state C and the combination of the signals in state B is the same, so it cannot be detected that the floor of the car is lower than the hall floor, and car 2 is aligned. The problem that does not perform is caused.

  Conversely, when the amount of engagement between the shielding plate 48 and the photoelectric sensor 3 is deep (as shown in the lower diagram of FIG. 6, the amount of horizontal overlap between the shielding plate 48 and the photoelectric sensor 3 is larger than the appropriate value. In the case), the car 2 puts passengers on the second floor, and when the passengers get off, the ropes contract and the floor of the car 2 moves to a position higher than the hall floor position. The output signals from the light receiving units 31, 32, 33 are “ON / ON / ON” as in the state A, and the combination of the signals with the state B is the same, so that the floor of the car is higher than the hall floor. Cannot be detected, and the car 2 does not perform alignment.

  Therefore, in the abnormality diagnosis device according to the embodiment of the present invention, the photoelectric sensor 3 and the shielding plate 4 are engaged with each other by using the shielding plate 4 in which the position detection shielding plate is provided with a notch for determining the amount of engagement. The amount of biting between the photoelectric sensor 3 and the shielding plate 4 is an appropriate value before the amount is deviated from the appropriate value and cannot be detected even if the stop position of the car 2 deviates from the appropriate stop position. An attempt is made to detect an abnormality in the amount of biting that is about to come off. FIG. 7 is a view for explaining abnormality detection when the biting into the photoelectric sensor according to one configuration example of the shielding plate according to the present embodiment is shallow and deep.

  In the upper diagram of FIG. 7, the amount of engagement between the shielding plate 4 and the photoelectric sensor 3 is shallow, and the amount of engagement between the shielding plate 4 and the photoelectric sensor 3 causes the malfunction of the output signal of the light receiving unit 32 to be floor aligned. It shows the state that has reached the previous limit. In such a case, when the car passes through the shielding plate 4 on the second floor in the descending operation, the output signals 31, 32, and 33 of the photoelectric sensor 3 change from the state A “ON / ON / OFF” to the state B “ON / OFF”. ON / OFF ”, state B to state C“ ON / ON / ON ”, state C to state D“ ON / OFF / ON ”, state D to state E“ ON / OFF / OFF ”, state E to state F“ ON / OFF / ON ”. In FIG. 7, state B corresponds to state A in FIG. 6, state C corresponds to state B in FIG. 6, and state D corresponds to state C in FIG.

  For example, in the state D in which the passenger 2 has moved into a position lower than the hall floor position from the state in which the passenger car 2 is stopped at a predetermined floor and the passenger car 2 is in the appropriate stop position, “ON / OFF / “ON”, unlike the “ON / ON / ON” state C in the middle diagram of FIG. 6, it changes to “ON / OFF / ON” in the state C in the upper diagram of FIG. Normal operation can be performed.

  Next, when the car 2 moves to the state E, the output signals of the light receiving portions 31, 32, and 33 when the amount of engagement between the shielding plate 4 and the photoelectric sensor 3 are in the proper positions are “ON / OFF / ON”. However, the output signal of the light receiving portions 31, 32, 33 is changed to "ON / OFF / OFF" by the notch portion 42 inserted in the shielding plate 4, and when the car 2 moves to the state F, the light receiving portion The output signals 31, 32, and 33 change to “ON / OFF / ON”. In the present embodiment, the proper stop position of the car 2 when it stops on a predetermined floor and the vertical deviation therefrom are determined by the sensor signal determination means 6, and the elevator gets on and off by passengers getting on and off from the determination result. When the position of the car 2 deviates from the appropriate position, the position of the car 2 is controlled so as to be an appropriate stop position. Further, when the car 2 passes a predetermined floor during normal operation, in this embodiment, the sensor signal determination means 6 indicates the light receiving state of the plurality of light receiving units 31, 32, 33 based on the output change of the photoelectric sensor 3. The combination is transmitted to the shielding plate biting amount determination means 8. The shielding plate biting amount determination means 8 analyzes this state change from the combination of the light receiving states of the plurality of light receiving portions 31, 32, 33 based on the output change of the photoelectric sensor 3 due to the notch portion 42, and the state D, It is determined that the amount of biting between the shielding plate 4 and the photoelectric sensor 3 is shallower than the appropriate value based on the change in the output signals of the light receiving units 31, 32, and 33 in the state E and the state F. That is, when the car 2 is stopped on the predetermined floor, it can be detected that the position is lower than the hall floor position in the state D, but when the car 2 passes the predetermined floor in the normal operation, the state based on the notch 42 is used. By detecting the output changes of D, E, and F, it is determined that the biting amount is shallower than the appropriate value.

Further, the car shielding board passage floor detection means 7 detects the position in the hoistway where the car 2 is located, and the shielding board 4 on which the photoelectric sensor 3 is occluded is on the floor of the hoistway. In the present embodiment, it is detected that it is on the second floor, and is output to the shielding plate biting amount determination means 8. Based on the two determination results, the shielding plate biting amount determination means 8 determines that the biting amount of the shielding plate 4 and the photoelectric sensor 3 on the second floor is shallower than the appropriate value, and displays the second floor on the display 9. It is displayed that the amount of biting between the shielding plate 4 and the photoelectric sensor 3 is shallow. Further, based on the abnormality signal from the shielding plate biting amount judging means 8, the abnormality reporting means 10 notifies the monitoring center 11 that the amount of biting between the shielding plate 4 and the photoelectric sensor 3 is abnormal, and the monitoring center. From the abnormality data received at 11, the confirmation instructing means 12 issues a confirmation instruction to the maintenance worker on the next inspection day, so that the shielding plate 4 and the photoelectric sensor 3 can be shielded before the amount of biting between the photoelectric sensor 3 and the malfunction occurs. 4 and the photoelectric sensor 3 can be adjusted to an appropriate value. In addition, it is possible to immediately grasp how many floors the shielding plate 4 that actually needs adjustment is. It should be noted that a shallow or deep abnormality in the amount of biting may occur due to, for example, wear of a car guide device or attachment of a shielding plate.
On the other hand, the lower diagram of FIG. 7 shows that the amount of biting between the shielding plate 4 and the photoelectric sensor 3 is deep, the amount of biting between the shielding plate 4 and the photoelectric sensor 3 is the malfunction in which the output signal of the light receiving unit 32 is floor-to-floor. It shows the state that has come to the limit that will cause. In such a case, when the car passes through the shielding plate 4 on the second floor in the ascending operation, the output signals of the light receiving portions 31, 32, and 33 of the photoelectric sensor 3 change from the state F “ON / OFF / ON” to the state E. “ON / OFF / ON”, from state E to state D “ON / OFF / ON”, from state D to state C “ON / ON / ON”, from state C to state B “ON / ON / OFF”, from state B State A changes to “ON / OFF / OFF”.

  For example, in the state B in which the car 2 is stopped at a predetermined floor and the car 2 is in the stop proper position, the passenger gets off the car 2 and the car 2 is moved to a position higher than the hall floor position. “ON / ON / OFF”, which is different from “ON / ON / ON” in the state C in the middle diagram of FIG. 6, and changes as “ON / ON / OFF” in the state C in the upper diagram of FIG. By doing so, the normal operation of floor matching can be performed. Next, when moving to the state A, the output signals of the light receiving units 31, 32, 33 when the biting amount of the shielding plate 4 and the photoelectric sensor 3 are at appropriate positions are “ON / ON / OFF”, The output signals of the light receiving portions 31, 32, and 33 are changed to “ON / OFF / OFF” by the cutout portion 41 inserted in the shielding plate 4, and when the photoelectric sensor 3 passes through the shielding plate 4, the light receiving portions 31, 32, The output signal 33 changes to “OFF / OFF / OFF”.

  Therefore, the shielding plate biting amount determination means 8 analyzes this state change from the combination of the light receiving states of the plurality of light receiving portions 31, 32, 33 based on the output change of the photoelectric sensor 3 due to the notch portion 42, and It is determined that the amount of biting between the shielding plate 4 and the photoelectric sensor 3 is deeper than the appropriate value based on changes in the output signals of the light receiving units 31, 32, and 33 in C, State B, and State A. Further, the car shielding board passage floor detection means 7 detects that it is the second floor and outputs it to the shielding board biting amount determination means 8. Based on the two determination results, the shielding plate biting amount determination means 8 determines that the biting amount of the shielding plate 4 and the photoelectric sensor 3 on the second floor is deeper than an appropriate value, and displays the second floor on the display 9. It is displayed that the amount of biting between the shielding plate 4 and the photoelectric sensor 3 is deep.

  Further, based on the abnormality signal from the shielding plate biting amount judging means 8, the abnormality reporting means 10 notifies the monitoring center 11 that the amount of biting between the shielding plate 4 and the photoelectric sensor 3 is abnormal, and the monitoring center. From the abnormality data received in 11, the confirmation instructing means 12 issues a confirmation instruction to the maintenance worker on the next inspection day, so that the amount of biting between the shielding plate 4 and the photoelectric sensor 3 becomes abnormal before the malfunction occurs due to the abnormality. The biting amount of the photoelectric sensor 3 can be adjusted to an appropriate value.

  Next, an abnormality detection of the amount of biting of the elevator when the biting amount determination units 51 and 52 for biting amount determination are attached to the shielding plate 48, which is another configuration example of the shielding plate according to the embodiment of the present invention. Will be described below with reference to FIG. FIG. 8 is a diagram for explaining abnormality detection when the biting into the photoelectric sensor according to another configuration example of the shielding plate according to the present embodiment is shallow and deep.

  8, when the amount of biting between the shielding plate 48 and the photoelectric sensor 3 is shallow, when the car passes through the shielding plate 48 on the second floor in a descending operation, the light receiving portions 31, 32, The output signal 33 is state A “OFF / OFF / OFF” to state B “OFF / ON / OFF”, state B to state C “ON / ON / OFF”, and state C to state D “ON / ON / ON”. , State D changes to state E “ON / OFF / ON”, and state E changes to state F “OFF / OFF / OFF”.

  At this time, in the state E, the amount of engagement between the shielding plate 48 and the photoelectric sensor 3 can be operated normally, but the light receiving unit 32 has reached a limit causing a malfunction. At this time, in the state B, when the biting amounts of the shielding plate 48 and the photoelectric sensor 3 are appropriate, the output signals of the light receiving units 31, 32, 33 are “OFF / OFF / OFF”, but the biting amount detection unit 51 As a result, the output signals of the light receiving portions 31, 32, 33 are "OFF / ON / OFF". By analyzing this state change, the shielding plate biting amount determination means 8 indicates that the biting amount of the shielding plate 48 and the photoelectric sensor 3 is shallower than the appropriate value due to the change of the output signal of the light receiving units 31, 32, 33 in the state B. Determine.

  Further, the car shielding board passage floor detection means 7 detects that the car 2 is on the second floor. Based on the two determination results (the biting amount is shallow and the car is on the second floor), the shielding plate biting amount determination means 8 is the biting amount of the second-level shielding plate 4 and the photoelectric sensor 3. Is determined to be less than the appropriate value as an abnormality, and the indicator 9 displays that the amount of biting between the shielding plate 4 on the second floor and the photoelectric sensor 3 is shallow. Further, based on the abnormality signal from the shielding plate biting amount judging means 8, the abnormality reporting means 10 notifies the monitoring center 11 that the amount of biting between the shielding plate 4 and the photoelectric sensor 3 is abnormal, and the monitoring center. From the abnormality data received at 11, the confirmation instructing means 12 issues a confirmation instruction to the maintenance worker on the next inspection day, so that the amount of biting between the shielding plate 4 and the photoelectric sensor 3 becomes abnormal before the malfunction occurs due to the abnormality. The biting amount of the photoelectric sensor 3 can be adjusted to an appropriate value.

  As shown in the lower part of FIG. 8, when the amount of biting between the shielding plate 4 and the photoelectric sensor 3 is deep, when the car passes through the shielding plate 48 on the second floor in the ascending operation, the light receiving portion of the photoelectric sensor 3. The output signals of 31, 32, and 33 are from state F “OFF / OFF / OFF” to state E “OFF / OFF / ON”, from state E to state D “ON / OFF / ON”, and from state D to state C “ON · ON / ONJ, state C changes to state B “ON / ON / OFF”, and state B changes to state A “OFF / OFF / OFF”.

  At this time, in the state B, the amount of engagement between the shielding plate 48 and the photoelectric sensor 3 can be normally operated, but the optical axis 33 has reached a limit causing a malfunctioning operation. At this time, in the state E, when the amount of biting between the shielding plate 48 and the photoelectric sensor 3 is appropriate, the output signals of the light receiving units 31, 32, 33 are “OFF / OFF / OFF”, but the biting amount detecting unit By 52, the output signals of the light receiving portions 31, 32, 33 become “OFF / OFF / ON”. By analyzing this state change, the shielding plate biting amount determination means 8 indicates that the biting amount of the shielding plate 4a and the photoelectric sensor 3 is deeper than the appropriate value due to the change of the output signal of the light receiving units 31, 32, 33 in the state E. Determine.

  Further, the car shielding board passage floor detection means 7 detects that the car 2 is on the second floor. Based on these two determination results, the shielding plate biting amount determination means 8 determines that the biting amount of the second floor shielding plate 48 and the photoelectric sensor 3 is deeper than the appropriate value, and displays the second floor on the display 9. The fact that the amount of biting between the shielding plate 48 and the photoelectric sensor 3 is deep is displayed. Further, based on the abnormality signal of the shielding plate biting amount judging means 8, the abnormality reporting means 10 notifies the monitoring center 11 that the amount of biting of the shielding plate 48 and the photoelectric sensor 3 is abnormal, and the monitoring center. From the abnormality data received at 11, the confirmation instructing means 12 issues a confirmation instruction to the maintenance worker on the next inspection day, so that the amount of biting between the shielding plate 4 and the photoelectric sensor 3 becomes abnormal before the malfunction occurs due to the abnormality. The biting amount of the photoelectric sensor 3 can be adjusted to an appropriate value.

  As described above, the embodiment of the present invention has the photoelectric sensor 3 mounted on the car with the optical axes 61, 62, 63 between the plurality of light projecting units and the light receiving unit, and the hoistway 1 The position detection shielding plate 4 installed at a predetermined position facing the photoelectric sensor 3 is provided with notches 41 and 42 at positions that do not affect the position detection, so that the car 2 passes through the shielding plate 4. A biting amount determination means 8 for automatically detecting a shift in the biting amount between the photoelectric sensor 3 and the shielding plate 4 by determining a combination that blocks the optical axes 61, 62, 63 of the photoelectric sensor 3 each time. The main feature is to notify the data center if there is an abnormality in the biting amount and to display on which floor the biting amount of the photoelectric sensor and the shielding plate is different.

  Since the present invention has the above-mentioned features, the shielding plate can always check the biting amount of the photoelectric sensor and the shielding plate mounted on the car, in addition to the normal function for detecting the position of the car, In order to notify the center when the amount of biting between the photoelectric sensor and the shielding plate changes due to wear of the guide device of the car or the installation of a shielding plate, etc. In addition, it is possible to check whether or not the amount of biting between the shielding plate and the photoelectric sensor at the time of installing the elevator can be confirmed with a display, and the inspection time can be reduced. In the present embodiment, the description has been given by taking, as an example, only the information for detecting the proper stop position of the car as the shielding plate, but the information for detecting the absolute position in the hoistway of the car. Also, the present invention may be applied to what is mounted. When absolute position information is installed, if there is an abnormality in the amount of biting between the photoelectric sensor and the shielding plate, a more serious situation is assumed where the position in the hoistway cannot be grasped or erroneously detected. According to the present invention, it is possible to prevent such a situation from occurring.

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Passenger car 3 Photoelectric sensor 4 Shielding board 6 Sensor signal determination means 7 Passenger car shielding board passage floor detection means 8 Shielding board biting amount judgment means 9 Display 10 Abnormality reporting means 11 Monitoring center 12 Confirmation instruction means 31, 32, 33 Light receiving part 35, 36, 37 Light projecting part 41, 42 Notch part 43, 44 Notch part for detecting car position (concave part)
48 Normal shielding plate 51, 52 Biting amount detection unit 61, 62, 63 Optical axis

Claims (5)

A plurality of light emitting units that emit light and a plurality of light receiving units that receive light from the plurality of light projecting units are arranged to face each other, and a photoelectric sensor that outputs a light receiving state of each of the plurality of light receiving units is mounted. Mounted on the car, and when the car is positioned at the proper stop position of the car on each floor, a shading plate for car position detection that shields between the light emitting part and the light receiving part of the photoelectric sensor Based on the output of the photoelectric sensor shielded by the shielding plate, whether or not the vehicle is in an appropriate stop position on the floor where the car stops is determined based on the combination of the light receiving states of the light receiving unit. In an elevator equipped with a judging means for judging whether or not the landing position of the car is appropriate,
The shield plate is provided with a notch portion that detects the amount of biting of the shield plate with respect to the photoelectric sensor at a portion different from the concave portion for detecting the position of the car.
When the car passes through the shielding plate, it is detected by the photoelectric sensor from a combination of light receiving states of the plurality of light receiving units based on output changes of the photoelectric sensor due to the notch. An apparatus for diagnosing an abnormality of an elevator, comprising: a shielding plate biting amount determining unit that determines a biting amount of the shielding plate with respect to the photoelectric sensor. In claim 1,
The notch for detecting the biting amount has a shape that can detect from the change in output of the photoelectric sensor that the biting amount of the photoelectric sensor and the shielding plate has reached the limit position of an appropriate range. An elevator abnormality diagnosis apparatus characterized by comprising: A plurality of light emitting units that emit light and a plurality of light receiving units that receive light from the plurality of light projecting units are arranged to face each other, and a photoelectric sensor that outputs a light receiving state of each of the plurality of light receiving units is mounted. Mounted on the car, and when the car is positioned at the proper stop position of the car on each floor, a shading plate for car position detection that shields between the light emitting part and the light receiving part of the photoelectric sensor Based on the output of the photoelectric sensor shielded by the shielding plate, whether or not the vehicle is in an appropriate stop position on the floor where the car stops is determined based on the combination of the light receiving states of the light receiving unit. In an elevator equipped with a judging means for judging whether or not the landing position of the car is appropriate,
The shield plate is provided with a projecting portion that detects the amount of the shield plate biting into the photoelectric sensor at a location different from the concave portion for detecting the position of the car.
When the car passes through the shielding plate, the photoelectric sensor detects from the combination of the light receiving states of the plurality of light receiving units based on the output change of the photoelectric sensor due to the protruding portion. An apparatus for diagnosing an abnormality of an elevator, comprising: a shielding plate biting amount determining unit that determines a biting amount of the shielding plate with respect to the photoelectric sensor. In claim 3,
The protruding portion for detecting the biting amount can detect from the change in the output of the photoelectric sensor that the biting amount of the photoelectric sensor and the shielding plate has reached the limit position of an appropriate range. An elevator abnormality diagnosis device characterized by having a shape standing on upper and lower ends of a plate. In claims 1 to 4,
An elevator abnormality diagnosing device, comprising: an abnormality reporting means for reporting a biting amount abnormality at a remote monitoring center when the shielding plate biting amount determination unit determines that the biting amount is abnormal.

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