JP2013124160A - Device for detecting rope swing of elevator - Google Patents

Abstract

An elevator rope runout detection device capable of determining whether a sensor is good or bad with a simple configuration is provided.
In a rope runout detecting device for detecting runout of a long object in an elevator hoistway, the long object provided in the hoistway and having a detection shaft having a shake less than a predetermined amount. Is not blocked by the long object with the deflection exceeding the specified amount, and is blocked by at least one of a car and a counterweight that move up and down along the hoistway in the hoistway. A detection sensor which is arranged at a position and outputs a detection signal when the detection axis is interrupted; a position detection means for detecting a position of at least one of the both in the hoistway; a detection signal of the detection sensor; Determination means for determining the quality of the detection operation of the detection sensor from the detection result of the position detection means.
[Selection] Figure 1

Description

  The present invention relates to an elevator rope runout detection apparatus.

  Long objects (main ropes, governor ropes, control cables, etc.) in the elevator hoistway may resonate with long-period vibrations of buildings caused by earthquakes and winds, and may swing greatly. Conventionally, as a detection of such a swing of a long object in the hoistway, various ropes are used as the car suspended on the main rope by the hoisting machine in the hoistway moves up and down in the hoistway. A vibration detection sensor that optically detects that the vibration has more than a predetermined amount in the horizontal direction, and a car operation stop means that stops the operation of the car when the vibration detection sensor detects a swing of the rope. Are known (for example, see Patent Document 1).

  Also, a projector that emits light toward a normal position such as ropes disposed in the hoistway, and a projector that is disposed opposite the projector with the ropes interposed therebetween, receive light emitted from the projector. A sensor that forms a shake detection sensor with a light receiver and detects abnormalities such as ropes when the light is received by the light receiver when the light is emitted from the projector is also known in the past (for example, a patent Reference 2).

JP 2008-063112 A JP 2007-276895 A

  In the conventional elevator rope runout detection devices disclosed in these patent documents, it is necessary to find a failure in the detection operation of the optical detection sensor and maintain a normal monitoring state. In order to find a defect in the detection operation of the detection sensor, it is conceivable to provide the sensor with a self-diagnosis function. However, in this case, when there are a plurality of detection sensors, it is necessary to provide each sensor with a self-diagnosis function and an abnormal output function, which causes a problem that the device configuration becomes complicated and the cost of the equipment increases.

  The present invention has been made to solve such a problem, and it is possible to determine the quality of a sensor with a simple configuration, and to improve the reliability of the detection result of the sensor. Get the device.

  The elevator rope runout detection apparatus according to the present invention is a rope runout detection apparatus that detects runout of a long object in the elevator hoistway, and is provided in the hoistway, and a detection axis is predetermined. A car that is not obstructed by the long object with a deflection less than the prescribed amount, is obstructed by the elongated object with a deflection greater than the prescribed amount, and moves up and down along the hoistway in the hoistway. And a detection sensor that outputs a detection signal when the detection shaft is blocked, and a position detection that detects a position of at least one of the both in the hoistway. And a determination means for determining the quality of the detection operation of the detection sensor from the detection signal of the detection sensor and the detection result of the position detection means.

  In the elevator rope runout detection apparatus according to the present invention, the quality of the sensor can be determined with a simple configuration, and the reliability of the detection result of the sensor can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole elevator structure provided with the rope shake detection apparatus which concerns on Embodiment 1 of this invention. It is a figure explaining the determination of the quality of the sensor in the rope shake detection apparatus which concerns on Embodiment 1 of this invention. It is a figure explaining the determination of the quality of the sensor in the rope shake detection apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the process at the time of the sensor detection operation | movement in the rope shake detection apparatus which concerns on Embodiment 1 of this invention.

  The present invention will be described with reference to the accompanying drawings. Throughout the drawings, the same reference numerals indicate the same or corresponding parts, and redundant description thereof will be simplified or omitted as appropriate.

Embodiment 1 FIG.
FIGS. 1 to 4 relate to Embodiment 1 of the present invention. FIG. 1 is a diagram showing the overall configuration of an elevator equipped with a rope shake detection device, and FIGS. 2 and 3 are sensors of the rope shake detection device. FIG. 4 is a flowchart illustrating processing during sensor detection operation in the rope shake detection device.

  In FIG. 1, 1 is a hoistway erected in a building where an elevator is installed. In this hoistway 1, there is disposed a car 2 that lifts and lowers a user and luggage. One end of the main rope 3 is connected to the upper end of the car 2, and the other end of the main rope 3 is connected to the upper end of the counterweight 4. And the intermediate part of the main rope 3 is wound around the drive sheave of the hoisting machine 6 installed in the machine room 5 provided in the top part of the hoistway. In this way, the car 2 and the counterweight 4 are suspended by the main rope 3 in a slidable manner that can be raised and lowered in opposite directions in the hoistway.

  The entire operation of the elevator including the raising and lowering operation of the car 2 is controlled by a control panel 7 installed in the machine room 5. The control panel 7 and various devices installed in the car 2 (for example, a door motor, a lighting device, an in-car operation panel, etc.) are communicably connected via a control cable 8. One end of the control cable 8 is connected to the lower end of the car 2 and is suspended in the hoistway 1. The other end of the control cable 8 is fixed to the hoistway wall in the middle of the hoistway 1. .

  In the following, ropes and cables such as the main rope 3 and the control cable 8 suspended in the hoistway 1 are referred to as long objects. As the long object, in addition to the main rope 3 and the control cable 8, a speed governor provided endlessly from the top to the bottom in the hoistway 1 and circulates in conjunction with the raising and lowering of the car 2. In order to prevent the load on the rope and the main rope 3 from being biased toward the car 2 side or the counterweight 4 side, both ends are connected to the lower end of the car 2 and the lower end of the counterweight 4, respectively. A suspended compen- sion rope or the like may be included (note that the governor rope and the compen- sion rope are not shown).

  In the hoistway 1, a plurality of photoelectric sensors 9 for detecting a shake of a long object are installed. Each photoelectric sensor 9 includes a pair of projector 9a and light receiver 9b. The projector 9a is installed at a predetermined height position on one side of the inner wall of the hoistway 1 (including a fixed body attached to the inner wall of the hoistway 1). The light receiver 9b is installed on the other side of the inner wall of the hoistway 1 (also including a fixed body) sandwiching a long object that is a shake detection target, facing the pair of projectors 9a.

  The light projector 9a emits light in a predetermined direction, and the light receiver 9b receives light emitted from the pair of light projectors 9a. Thus, the detection axis 9c of the photoelectric sensor 9 is formed by the optical axis of the light emitted from the projector 9a to the light receiver 9b. The detection shaft 9c is arranged at a position that is blocked by the long object when the vibration of the long object that is the object of vibration detection exceeds a specified amount. Therefore, when the shake of the long object is less than the specified amount, the detection shaft 9c is not blocked.

  That is, the position where the photoelectric sensor 9 is installed depends on the position of the long object to be shake detected in the hoistway 1 and the location where the maximum amplitude is generated. When it becomes above, it determines so that it may arrange | position in the position where the detection axis 9c is interrupted | blocked by the said elongate object.

  The photoelectric sensor 9 outputs a detection signal when the light receiver 9b stops receiving light from the projector 9a, and does not output a detection signal while the light receiver 9b receives light from the projector 9a. Detection signals output from the photoelectric sensors 9 are input to the control panel 7.

  Based on the detection signal output from each photoelectric sensor 9, the control panel 7 detects a shake greater than the specified amount of the long object in the hoistway 1. Further, the control panel 7 performs the detection signal output operation of each photoelectric sensor 9 based on the detection signal output from each photoelectric sensor 9 and the positional information in the hoistway of at least one of the car 2 and the counterweight 4. A pass / fail judgment is made to see if there are any abnormalities. The position information of the car 2 and the counterweight 4 can be obtained based on the output from position detecting means such as a pulse encoder provided on the rotating shaft of the hoisting machine 6, for example.

  The quality determination of each photoelectric sensor 9 in the control panel 7 will be further described. First, as described above, the detection shaft 9c of each photoelectric sensor 9 is disposed at a position that is blocked by the long object when the shake of the long object becomes equal to or greater than a specified amount. Further, the detection shaft 9c of the detection shaft 9c of each photoelectric sensor 9 is configured such that at least one of the elevator car 2 and the counterweight 4 that move up and down along the respective lifting paths, It is also arranged to block the detection axis 9c of the photoelectric sensor 9 when passing between the two.

  That is, the detection shaft 9c of each photoelectric sensor 9 includes a long object whose shake has become a predetermined amount or more, and a car 2 and a counterweight 4 (at least one of them) that pass between the projector 9a and the light receiver 9b. It is arranged so as to be blocked by both sides.

  In the photoelectric sensor 9 arranged in this way, not only when the shake of the long object to be detected exceeds a specified amount, the car 2 and the counterweight 4 are provided between the light projector 9a and the light receiver 9b. The detection signal is also output when the signal passes through (A part in FIG. 2). Here, the detection signals output from the photoelectric sensors 9 can be distinguished from each other. Therefore, the control panel 7 can determine which photoelectric sensor 9 from among the plurality of photoelectric sensors 9 the received detection signal is output from.

  The control panel 7 determines the quality of the detection operation of each photoelectric sensor 9 based on the detection signal output from each photoelectric sensor 9 and the positional information on the car 2 and the counterweight 4. That is, when the control panel 7 receives a detection signal from a certain photoelectric sensor 9, it determines from the position information that there is a car 2 or a counterweight 4 at a position that blocks the detection shaft 9c of the photoelectric sensor 9. The detection signal is based on the detection of the car 2 or the counterweight 4, and it is determined that the detection operation of the photoelectric sensor 9 is normal (A4 in FIG. 2).

  In addition, when the control panel 7 receives a detection signal from a certain photoelectric sensor 9, the control car 7 and the counterweight 4 are also the detection targets at the position where the detection shaft 9c of the photoelectric sensor 9 is disposed. When it is determined from the position information that there is no object, the detection signal determines that the detection operation of the photoelectric sensor 9 is abnormal (part B in FIG. 3).

  When there is a photoelectric sensor 9 that is determined to have an abnormality in the detection operation, the control panel 7 notifies the abnormality occurrence of the photoelectric sensor 9 to the outside of the building where the elevator is installed (for example, a maintenance / monitoring center). Make a report. Until the reset operation (confirmation / recovery work by maintenance personnel) is performed, the photoelectric sensor 9 is disconnected (the output from the photoelectric sensor 9 is ignored), and a photoelectric sensor 9 other than the photoelectric sensor 9 is used. Continue to monitor long objects for shake.

  It should be noted that the long object to be detected is arranged at a predetermined position in the hoistway 1 with one end connected to the hoistway 1 or the counterweight 4 (for example, the main rope 3 or the control cable 8). (Such as a governor rope). The position of the long object whose one end is connected to the hoistway 1 or the counterweight 4 can be obtained from the positional information of the hoistway 1 and the counterweight 4.

  When the control panel 7 receives a detection signal from a certain photoelectric sensor 9, the car 2 and the counterweight 4 do not exist at the position where the detection shaft 9c of the photoelectric sensor 9 is disposed, and When it is determined from the position information that there is a long object to be detected, it is determined that the detection signal is due to detection of a shake greater than a specified amount of the long object.

  If the control panel 7 determines that a shake greater than the specified amount of the long object has been detected, the control panel 7 shifts the operation mode of the elevator to the long object shake control operation. In this long-object run-out control operation, first, after the car 2 is stopped at the nearest floor, according to the run-out amount of the long article, the run-out quantity of the long article is relatively small “low run-out” After the stoppage of the nearest floor, it returns to normal operation after a certain period of time. If the runout of a long object is relatively large, the maintenance staff checks or automatically diagnoses after the nearest floor stops. It returns to normal operation after temporary recovery operation.

  When the detection signal is output from the photoelectric sensor 9 without the car 2 or the counterweight 4 at the position of the detection shaft 9c or when there is no long object at the position of the detection shaft 9c, the control panel 7 Control operation is not performed because it is judged as an unnecessary detection operation. By doing in this way, the unnecessary control operation resulting from malfunction etc. can be suppressed and service degradation can be prevented.

The flowchart of FIG. 4 shows the operation of the elevator rope runout detection apparatus in this embodiment.
First, when one of the photoelectric sensors 9 performs a detection operation and outputs a detection signal in step S1, the control panel 7 that has received the detection signal output from the photoelectric sensor 9 in step S2 receives the car 2 or the balance. It is confirmed whether or not the weight 4 is at a position where the detection shaft 9c of the photoelectric sensor 9 is blocked.

  If the car 2 or the counterweight 4 is at a position that blocks the detection shaft 9c of the photoelectric sensor 9, the process proceeds to step S3, and the control panel 7 receives the detected signal from the car 2 or the counterweight 4. This is because the detection shaft 9c is blocked, and it is determined that the detection operation of the photoelectric sensor 9 is normal. And the elevator continues normal operation.

  On the other hand, if the car 2 or the counterweight 4 is not in a position that blocks the detection shaft 9c of the photoelectric sensor 9 in step S2, the process proceeds to step S4. In step S <b> 4, it is confirmed whether or not there is a long object that is a shake detection target at the position of the detection shaft 9 c of the photoelectric sensor 9.

  If the long object is at a position that blocks the detection axis 9c of the photoelectric sensor 9, the process proceeds to step S5, where the photoelectric sensor 9 receives the detected signal because the detection axis 9c is blocked by the long object. It is determined that the long object is shaking more than the specified amount, and the long object shake control operation is performed.

  On the other hand, if the long object is not at the position of the detection axis 9c of the photoelectric sensor 9 in step S4, the process proceeds to step S6. In step S6, the control panel 7 outputs a detection signal from the photoelectric sensor 9 even though the car 2, the counterweight 4 and the long object are not present at the position of the detection shaft 9c of the photoelectric sensor 9. As a result, it is determined that the photoelectric sensor 9 is defective.

  In subsequent step S7, the control panel 7 reports the abnormality of the photoelectric sensor 9 to the outside and disconnects the photoelectric sensor 9 (hereinafter, the output from the photoelectric sensor 9 is ignored).

  Here, a case has been described in which when the detection signal from the photoelectric sensor 9 is received, the quality of the photoelectric sensor 9 is determined using the position information of the car 2 and the counterweight 4 at that time. However, the timing for determining the quality of the photoelectric sensor 9 is not only when the detection signal from the photoelectric sensor 9 is received, but, for example, the car 2 and the counterweight 4 pass through the position of the detection shaft 9c of the photoelectric sensor 9. Sometimes, it may be determined whether the detection signal is output from the photoelectric sensor 9 or not. By doing in this way, not only the on failure of the photoelectric sensor 9 but also the off failure can be detected.

  The elevator rope runout detection apparatus configured as described above is provided in the hoistway, and the detection shaft is not obstructed by a long object having a runout smaller than a predetermined prescribed amount, and the runout exceeding the prescribed amount is detected. When the detection shaft is blocked, the detection signal is blocked by the long object, and at least one of the car and the counterweight moving up and down the hoistway along each hoisting path. Detection operation of the detection sensor from a photoelectric sensor that is a detection sensor that outputs a signal, position detection means for detecting a position of at least one of the two in the hoistway, a detection signal of the detection sensor and a detection result of the position detection means Determination means for determining whether the quality is good or bad.

  For this reason, even if a function such as a self-diagnosis function or an abnormal output is not mounted on each detection sensor, it is possible to continuously check the response of the sensor and determine whether it is acceptable or not. Therefore, the quality of the sensor can be determined with a simple configuration, and the cost of the sensor can be reduced by simplifying the function of the detection sensor and suppressing the increase in the number of input terminals on the control panel side.

  In Patent Document 2 (Japanese Patent Laid-Open No. 2007-276895) listed above, the position of the car is detected, and ropes or the like at a normal position based on the detected car position include a projector and a light receiver. It is described that it is determined whether or not they are arranged between the two. However, unlike the configuration of the present invention, the configuration described in Patent Document 2 detects the shake of a long object when the photoreceiver receives light (in contrast, the present invention is directed to the photoreceiver). Detects shake of long objects when the light is blocked.)

  For this reason, in the thing described in patent document 2, when the long thing which is a candidate for detection does not exist in the position of a detection sensor by movement of a car, a detection signal is outputted from a detection sensor. End up. Therefore, the position of the car is detected in order to determine the validity / invalidity of the detection sensor based on the position of the car, and the quality of the detection sensor is not determined using the position information of the car.

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Passenger car 3 Main rope 4 Balance weight 5 Machine room 6 Hoisting machine 7 Control panel 8 Control cable 9 Photoelectric sensor 9a Light projector 9b Light receiver 9c Detection axis

Claims (4)

A rope runout detecting device for detecting runout of a long object in an elevator hoistway,
Provided in the hoistway, the detection axis is not obstructed by the long object with a vibration less than a predetermined amount, and is obstructed by the long object with a vibration of the predetermined amount or more, and A detection sensor that is disposed at a position that is blocked by at least one of a car and a counterweight that move up and down along the hoistway in the hoistway, and that outputs a detection signal when the detection shaft is blocked;
Position detecting means for detecting a position of at least one of the two in the hoistway;
An elevator rope runout detection apparatus comprising: a determination unit that determines whether the detection operation of the detection sensor is good or bad based on a detection signal of the detection sensor and a detection result of the position detection unit.   When the detection signal is output from the detection sensor, the determination means detects the detection sensor if at least one of the positions is a position that blocks the detection axis of the detection sensor. The apparatus according to claim 1, wherein the apparatus is determined to be normal.   When the detection signal is output from the detection sensor, the determination means determines whether the position of the both and the position of the elongate object in the vertical direction are the detection axes of the detection sensor that output the detection signal. 3. The elevator rope runout detection apparatus according to claim 1, wherein if the position is not a blocking position, the detection operation of the detection sensor is determined to be abnormal. 4.   When a detection signal is output from the detection sensor, neither the position of the both or the position of the elongate object in the ascending / descending direction is a position that blocks the detection axis of the detection sensor that outputs the detection signal. Then, the long-body shake control operation is not performed, and the rope run-out detection device for an elevator according to any one of claims 1 to 3.

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