WO2020136739A1 - Device for detecting defect in hydraulic elevator and method for repairing existing hydraulic elevator - Google Patents

Device for detecting defect in hydraulic elevator and method for repairing existing hydraulic elevator Download PDF

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Publication number
WO2020136739A1
WO2020136739A1 PCT/JP2018/047761 JP2018047761W WO2020136739A1 WO 2020136739 A1 WO2020136739 A1 WO 2020136739A1 JP 2018047761 W JP2018047761 W JP 2018047761W WO 2020136739 A1 WO2020136739 A1 WO 2020136739A1
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Prior art keywords
hydraulic
control valve
pressure
power unit
car
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PCT/JP2018/047761
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French (fr)
Japanese (ja)
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博章 釜井
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三菱電機株式会社
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Priority to PCT/JP2018/047761 priority Critical patent/WO2020136739A1/en
Publication of WO2020136739A1 publication Critical patent/WO2020136739A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions

Definitions

  • the present invention relates to an abnormality detecting device for a hydraulic elevator that detects an abnormality in a control valve of a hydraulic power unit, and a method for repairing an existing hydraulic elevator that repairs an existing hydraulic elevator.
  • a control valve for controlling the flow of oil to a hydraulic jack is one of the devices that make up a hydraulic power unit provided in a conventional hydraulic elevator (for example, see Patent Document 1).
  • a control valve of a hydraulic power unit includes an electromagnetic valve and a piston that moves inside the valve by opening and closing the electromagnetic valve.
  • the piston in the control valve serves to generate and block the flow of oil between the hydraulic power unit and the hydraulic jack.
  • the piston in the control valve is positioned to block such oil flow.
  • the present invention has been made to solve the above problems, and an abnormality detection device for a hydraulic elevator that can detect an abnormality in a control valve of a hydraulic power unit, and a hydraulic power unit for an existing hydraulic elevator. It is an object of the present invention to obtain a method of rehabilitating an existing hydraulic elevator that adds a function of detecting an abnormality in a control valve.
  • the abnormality detection device for a hydraulic elevator is provided between a hydraulic jack that raises and lowers a car and a control valve included in a hydraulic power unit that controls the hydraulic pressure of the hydraulic jack, and connects the hydraulic power unit and the hydraulic jack.
  • the pressure sensor that detects the pressure in the hydraulic piping and outputs the detected pressure as the detected pressure, and the detected pressure obtained from the pressure sensor after the timing when the valve closing control that closes the control valve included in the hydraulic power unit is performed. Based on this, it is determined whether or not the control valve is abnormal, and when it is determined that the control valve is abnormal, an abnormality determination unit that detects that the control valve is abnormal is provided.
  • a method of repairing an existing hydraulic elevator in the present invention is a method of repairing an existing hydraulic elevator that repairs an existing hydraulic elevator that includes a hydraulic jack that raises and lowers a car, and a hydraulic power unit that controls the hydraulic pressure of the hydraulic jack.
  • a step of detecting a pressure in the hydraulic pipe connecting the hydraulic power unit and the hydraulic jack and providing a pressure sensor for outputting the detected pressure as a detected pressure Close the control valve included in the power unit Determine whether the control valve is abnormal based on the detected pressure obtained from the pressure sensor after the timing when the valve closing control is performed, and determine that the control valve is abnormal In that case, a step of providing an abnormality determination unit for detecting that the control valve is abnormal is provided.
  • the abnormality detection apparatus of the hydraulic elevator which can detect the abnormality of the control valve of a hydraulic power unit
  • the existing hydraulic elevator which adds the function which detects the abnormality of the control valve of a hydraulic power unit with respect to an existing hydraulic elevator. You can get the repair method.
  • FIG. 1 is an overall configuration diagram showing a hydraulic elevator according to a first embodiment of the present invention. It is a block diagram which shows the abnormality detection apparatus of the hydraulic elevator in Embodiment 1 of this invention.
  • 3 is a timing chart showing an example of changes over time in the speed of the cage of the hydraulic elevator and the detected pressure detected by the pressure sensor of the abnormality detection device for the hydraulic elevator according to Embodiment 1 of the present invention.
  • 3 is a flowchart showing a series of abnormality detection processing performed by the abnormality detection device for a hydraulic elevator according to the first embodiment of the present invention.
  • FIG. 1 is an overall configuration diagram showing a hydraulic elevator according to Embodiment 1 of the present invention.
  • a hydraulic jack 1 for raising and lowering a car 7 is provided in the hoistway.
  • the hydraulic jack 1 includes a cylinder 2 fixed to the bottom of the hoistway, and a plunger 3 movable up and down with respect to the cylinder 2.
  • a deflector wheel 4 is provided at the upper end of the plunger 3.
  • a hydraulic power unit 5 that controls the hydraulic pressure of the hydraulic jack 1 is connected to the cylinder 2 via a hydraulic pipe 6.
  • the hydraulic jack 1 is operated by oil flowing from the hydraulic power unit 5 through the hydraulic pipe 6.
  • the hydraulic power unit 5 includes a hydraulic pump 51, a motor 52, a control valve 53, and an oil tank 54.
  • the motor 52 is driven under the control of the control device 100 described later.
  • the hydraulic pump 51 is driven by the motor 52, and supplies the oil stored in the oil tank 54 to the hydraulic jack 1.
  • the control valve 53 opens and closes the oil passage in the hydraulic pipe 6. When the control valve 53 is open, an oil flow occurs between the hydraulic power unit 5 and the hydraulic jack 1. On the other hand, when the control valve 53 is closed, the oil flow is shut off between the hydraulic power unit 5 and the hydraulic jack 1.
  • the control valve 53 includes a solenoid valve that opens and closes under the control of the control device 100 described later, and a piston that moves when the solenoid valve opens and closes.
  • the piston of the control valve 53 shuts off the oil flow between the hydraulic power unit 5 and the hydraulic jack 1 and the open position where an oil flow is generated between the hydraulic power unit 5 and the hydraulic jack 1 by opening and closing the solenoid valve. Move to and from the closed position.
  • the piston is in the open position, that is, when the control valve 53 is open, an oil flow is generated between the hydraulic power unit 5 and the hydraulic jack 1.
  • the piston is in the closed position, that is, when the control valve 53 is closed, the oil flow is shut off between the hydraulic power unit 5 and the hydraulic jack 1.
  • a rope 8 for suspending the basket 7 is wound around the deflecting car 4.
  • One end of the rope 8 is connected to the car 7, and the other end of the rope 8 is connected to the fixed part of the hoistway.
  • the car 7 travels vertically in the hoistway as the plunger 3 of the hydraulic jack 1 moves vertically.
  • a sheave 9 is provided above the hoistway, and a sheave 10 is provided below the hoistway.
  • a rope 11 is wound around the sheave 9 and the sheave 10 in a loop shape. One end and the other end of the rope 11 are connected to the car 7. The rope 11 moves as the car 7 travels in the vertical direction. The sheave 9 and the sheave 10 rotate according to the movement of the rope 11.
  • the rotary shaft of the sheave 9 is provided with an encoder 12 for detecting the position of the car 7.
  • the encoder 12 outputs a signal according to the rotation of the sheave 9.
  • the position of the car 7 is detected based on the signal output by the encoder 12.
  • the car 7 is provided with a car door 13 that opens and closes the entrance of the car 7.
  • the car door 13 moves when a drive device (not shown) provided in the car 7 is driven under the control of the control device 100 described later.
  • a hall door 14 for opening and closing a doorway of the hall is provided at the hall on each floor of the building where the hydraulic elevator is installed. The hall door 14 moves along with the movement of the car door 13.
  • the control device 100 controls the operation of the hydraulic elevator. More specifically, the control device 100 controls the hydraulic power unit 5 to control the flow of oil from the hydraulic power unit 5 to the hydraulic jack 1. That is, the control device 100 controls the flow of oil by controlling the driving of the hydraulic pump 51 and the motor 52 and the opening and closing of the control valve 53, respectively. The control device 100 controls the travel of the car 7 by changing the position of the plunger 3 of the hydraulic jack 1 by controlling the flow of oil.
  • the abnormality detection device 200 includes a pressure sensor 201 and an abnormality determination unit 202.
  • the pressure sensor 201 is provided between the hydraulic jack 1 and the control valve 53 included in the hydraulic power unit 5.
  • the pressure sensor 201 detects the pressure in the hydraulic pipe 6 that connects the hydraulic power unit 5 and the hydraulic jack 1, and outputs the detected pressure to the abnormality determination unit 202 as the detected pressure.
  • the abnormality determination unit 202 determines whether or not the control valve 53 is abnormal based on the detected pressure acquired from the pressure sensor 201 after the timing when the valve closing control for closing the control valve 53 included in the hydraulic power unit 5 is performed. judge. When it is determined that the control valve 53 is abnormal as a result of the determination, the abnormality determination unit 202 detects that the control valve 53 is abnormal.
  • FIG. 2 is a configuration diagram showing an abnormality detecting device 200 for a hydraulic elevator according to the first embodiment of the present invention.
  • the control device 100 that controls the traveling of the car 7 outputs a valve closing command for performing the valve closing control for closing the control valve 53 to the control valve 53 at the timing when the car 7 arrives at the stop floor. To do. As a result, the control valve 53 is closed and the car 7 stops at the stop floor. When the car 7 stops at the stop floor, the control device 100 controls the drive device provided in the car 7 to open the car door 13.
  • the control valve 53 will be in the open state even if the control device 100 inputs a valve closing command to the control valve 53. That is, even if the car 7 is landed on the stop floor and the valve closing control for closing the control valve 53 is performed, the control valve 53 is not completely closed. As a result, the suspension of the car 7 cannot be maintained.
  • control device 100 When the control device 100 outputs a valve closing command to the control valve 53, the control device 100 also outputs the valve closing command to the abnormality determination unit 202 of the abnormality detection device 200.
  • the abnormality determination unit 202 detects that the control device 100 has performed the valve closing control for closing the control valve 53.
  • the abnormality determination unit 202 determines whether the pressure sensor is operated while a preset set time elapses from the timing when the valve closing control is performed, specifically, the timing when the valve closing command is input from the control device 100.
  • the detected pressure is acquired from 201.
  • the abnormality determination unit 202 stores the pressure fluctuation pattern which is the fluctuation of the detected pressure acquired during the set time.
  • the abnormality determination unit 202 compares the above-described stored pressure fluctuation pattern with the previously stored reference pressure fluctuation pattern.
  • the reference pressure fluctuation pattern is a fluctuation pattern of the pressure in the hydraulic pipe 6 connecting the hydraulic power unit 5 and the hydraulic jack 1 when the control valve 53 normally operates when the above-mentioned valve closing control is performed. ..
  • the above-mentioned reference pressure fluctuation pattern is obtained in advance and stored in the abnormality determination unit 202.
  • the reference pressure fluctuation pattern is obtained, for example, by actually operating the hydraulic elevator when the control valve 53 operates normally and acquiring the detected pressure from the pressure sensor 201.
  • the reference pressure fluctuation pattern may be changed as appropriate by regularly performing such an operation.
  • the abnormality determination unit 202 determines that the control valve 53 is normal when the deviation of the pressure fluctuation pattern from the reference pressure fluctuation pattern is within a preset allowable range as a result of the above comparison. On the other hand, the abnormality determination unit 202 determines that the control valve 53 is abnormal when the deviation is not within the allowable range. When the abnormality determination unit 202 determines that the control valve 53 is abnormal, the abnormality determination unit 202 detects that the control valve 53 is abnormal.
  • FIG. 3 is a timing chart showing an example of changes over time in the speed of the cage 7 of the hydraulic elevator and the detected pressure detected by the pressure sensor 201 of the hydraulic elevator abnormality detection device 200 according to Embodiment 1 of the present invention. is there.
  • the behavior of the control valve 53 when the speed of the car 7 and the detected pressure detected by the pressure sensor 201 are normal is shown by a solid line, and the behavior when the control valve 53 is abnormal.
  • the behavior is shown by a broken line.
  • the control valve 53 As shown in FIG. 3, if the control valve 53 is normal, the control valve 53 is normally closed and the car 7 is normally stopped after the timing when the above-mentioned valve closing control is performed. On the other hand, if the control valve 53 is abnormal, even after this timing, the control valve 53 is not completely closed and the car 7 cannot be stopped. Further, as shown in FIG. 3, the fluctuation pattern of the detected pressure when the control valve 53 is normal is different from the fluctuation pattern of the detected pressure when the control valve 53 is abnormal.
  • control valve 53 is normal or abnormal is compared by comparing the reference pressure fluctuation pattern corresponding to the fluctuation pattern of the detected pressure when the control valve 53 is normal with the above-mentioned pressure fluctuation pattern. It becomes possible to judge.
  • the following method can be considered.
  • the abnormality determination unit 202 calculates the magnitude of the difference between the average value of the detected pressure acquired during the above-mentioned set time and the average value of the pressure in the reference pressure fluctuation pattern. Then, when the magnitude of the difference exceeds a preset threshold value, the abnormality determination unit 202 determines that the above deviation is not within the allowable range. On the other hand, when the magnitude of the difference is equal to or smaller than the threshold, the abnormality determining unit 202 determines that the above-mentioned deviation is within the allowable range.
  • the abnormality determination unit 202 maintains the door closed state in which the car door 13 remains closed even when the control valve 53 is detected to be abnormal, even when the car 7 is landed on the stop floor. Specifically, the abnormality determination unit 202 outputs an abnormality determination signal to the control device 100 to cause the control device 100 to perform control for maintaining such a door closed state.
  • the abnormality determination unit 202 has an abnormality in the control valve 53 based on the detected pressure acquired from the pressure sensor 201 after the timing when the valve closing control for closing the control valve 53 included in the hydraulic power unit 5 is performed. Or not. Specifically, the abnormality determination unit 202 obtains the pressure fluctuation pattern obtained by acquiring the detected pressure from the pressure sensor 201 during a set time period from the timing when the valve closing control is performed, and the above-described reference pressure fluctuation. By comparing with the pattern, it is determined whether the control valve 53 is abnormal.
  • the control device 100 When the abnormality determination signal is input from the abnormality detection device 200, the control device 100 does not open the car door 13 of the car 7 that is landing on the stop floor, but keeps the car door 13 closed. Stay in the state. Further, the control device 100 moves the car 7 from the stop floor to the bottom floor while keeping the door closed, and causes the car 7 to land on the bottom floor.
  • the control device 100 releases the door-closed state and opens the car door 13 of the car 7 when the car 7 is landed on the lowest floor.
  • FIG. 4 is a flowchart showing a series of abnormality detection processing performed by the abnormality detection device 200 for the hydraulic elevator according to the first embodiment of the present invention.
  • step S101 the abnormality determination unit 202 determines whether a valve closing command has been input from the control device 100. If it is determined that the valve closing command is input, the process proceeds to step S102, and if it is determined that the valve closing command is not input, the process ends.
  • step S102 the abnormality determination unit 202 acquires the detected pressure from the pressure sensor 201 during a set time period after the valve closing command is input in step S101, and detects the detected pressure during the set time period.
  • the pressure fluctuation pattern that is fluctuation is stored. After that, the process proceeds to step S103.
  • step S103 the abnormality determination unit 202 compares the pressure fluctuation pattern stored in step S102 with the reference pressure fluctuation pattern. After that, the process proceeds to step S104.
  • step S104 the abnormality determination unit 202 determines, as a result of the comparison in step S103, whether the deviation of the pressure fluctuation pattern from the reference pressure fluctuation pattern is within the allowable range. If it is determined that this deviation is within the allowable range, the processing proceeds to step S105, and if it is determined that this deviation is not within the allowable range, the processing proceeds to step S106.
  • step S105 the abnormality determination unit 202 determines that the control valve 53 is not abnormal, that is, the control valve 53 is normal. Then, the process ends.
  • step S106 the abnormality determination unit 202 determines that the control valve 53 is abnormal. In this case, the abnormality determination unit 202 outputs the abnormality determination signal to the control device 100, as described above. Then, the process ends.
  • the abnormality detection device 200 for a hydraulic elevator according to the first embodiment can be applied to a newly installed hydraulic elevator or an existing hydraulic elevator.
  • the existing hydraulic elevator is modified into a hydraulic elevator to which the above-mentioned abnormality detecting function is added, for example, by the following procedure. be able to.
  • the step of providing the pressure sensor 201 between the hydraulic jack 1 of the existing hydraulic elevator and the control valve 53 included in the hydraulic power unit 5 of the existing elevator is executed. Further, the step of providing the abnormality determination unit 202 in the existing hydraulic elevator is executed.
  • the function of the abnormality determination unit 202 may be installed in an existing control device that controls the existing hydraulic elevator, or an independent device other than this control device may be installed. The device may be newly installed and the function of the abnormality determination unit 202 may be installed in this device.
  • the hydraulic elevator abnormality detection device 200 includes the pressure sensor 201 provided between the hydraulic jack 1 and the control valve 53 included in the hydraulic power unit 5, and the control valve 53. Is abnormal, and when it is determined that the control valve 53 is abnormal, an abnormality determination unit 202 that detects that the control valve 53 is abnormal is provided. Further, the pressure sensor 201 is configured to detect the pressure in the hydraulic pipe 6 that connects the hydraulic power unit 5 and the hydraulic jack 1 and output the detected pressure as the detected pressure. Further, the abnormality determination unit 202 is configured to determine whether or not the control valve is abnormal based on the detected pressure acquired from the pressure sensor 201 after the timing when the valve closing control for closing the control valve 53 is performed. Has been done.
  • the hydraulic elevator abnormality detection device 200 closes the car door 13 when the control valve 53 is detected to be abnormal with respect to the above-described configuration, even when the car 7 is landed on the stop floor. It is configured to maintain a closed state that is left open. As a result, it is possible to prevent the car door 13 from opening in a situation where the car 7 cannot be kept stopped when the car 7 reaches the stop floor. Further, it is possible to prevent the car 7 from traveling with the car door 13 opened.
  • the function of the abnormality determination unit 202 of the abnormality detection device 200 according to the first embodiment described above is realized by a processing circuit.
  • the processing circuit that realizes the function of the abnormality determination unit 202 may be dedicated hardware or a processor that executes a program stored in the memory.
  • the processing circuit is dedicated hardware, the processing circuit is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), or an FPGA (Field Programmable Gate Array). , Or a combination of these.
  • the processing circuit is a processor
  • the function of the abnormality determination unit 202 is realized by software, firmware, or a combination of software and firmware.
  • Software and firmware are described as programs and stored in memory.
  • the processor realizes the function of the abnormality determination unit 202 by reading and executing the program stored in the memory.
  • the functions of the abnormality determination unit 202 described above may be partially implemented by dedicated hardware and partially implemented by software or firmware.
  • the processing circuit can realize the above-described function of the abnormality determination unit 202 by hardware, software, firmware, or a combination thereof.

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Abstract

This device for detecting defect in a hydraulic elevator is provided with: a pressure sensor that is disposed between a hydraulic jack for lifting/lowering a cage and a control valve included in a hydraulic power unit for controlling the hydraulic pressure of the hydraulic jack, that detects the pressure within a hydraulic pipe connecting the hydraulic power unit and the hydraulic jack, and that outputs the detected pressure as a detection pressure; and a defect determination unit that, on the basis of the detection pressure acquired from the pressure sensor after the timing at which valve-closing control is performed to close the control valve included in the hydraulic power unit, determines whether or not the control valve has a defect, and that, when the control valve is determined to have a defect, detects that the control valve is defective.

Description

油圧エレベータの異常検出装置および既設油圧エレベータの改修方法Abnormality detection device for hydraulic elevator and repair method for existing hydraulic elevator
　本発明は、油圧パワーユニットの制御弁の異常を検出する油圧エレベータの異常検出装置、および既設の油圧エレベータを改修する既設油圧エレベータの改修方法に関する。 The present invention relates to an abnormality detecting device for a hydraulic elevator that detects an abnormality in a control valve of a hydraulic power unit, and a method for repairing an existing hydraulic elevator that repairs an existing hydraulic elevator.
　従来の油圧エレベータ（例えば、特許文献１参照）に設けられている油圧パワーユニットを構成する機器の１つとして、油圧ジャッキへの油の流動を制御するための制御弁が挙げられる。一般的には、油圧パワーユニットの制御弁は、電磁弁と、電磁弁の開閉によって弁内を移動するピストンとを含んで構成されている。制御弁内のピストンは、油圧パワーユニットと油圧ジャッキとの間で油の流れを発生させたり遮断したりする役割を果たす。通常、かごの停止を維持する場合、制御弁内のピストンは、このような油の流れを遮断する位置に位置する。 A control valve for controlling the flow of oil to a hydraulic jack is one of the devices that make up a hydraulic power unit provided in a conventional hydraulic elevator (for example, see Patent Document 1). Generally, a control valve of a hydraulic power unit includes an electromagnetic valve and a piston that moves inside the valve by opening and closing the electromagnetic valve. The piston in the control valve serves to generate and block the flow of oil between the hydraulic power unit and the hydraulic jack. Usually, when maintaining the car stopped, the piston in the control valve is positioned to block such oil flow.
実開昭６２－１７３３６２号公報Japanese Utility Model Publication No. 62-173362
　ここで、上述のような油圧エレベータにおいて、かごが停止階に着床して制御弁を閉める制御が行われた場合に、制御弁の異常として、弁内のごみの詰まりなどに起因して油の流れを遮断する位置にピストンが正常に移動しない異常が発生する可能性がある。このような制御弁の異常が発生した場合、かごが停止階に着床した際にかごの停止を維持することができない可能性がある。そのため、油圧エレベータに設けられている油圧パワーユニットの制御弁の異常を検出する技術が求められる。 Here, in the hydraulic elevator as described above, when the car is controlled to land on the stop floor and the control valve is closed, the control valve is abnormal and the oil is blocked due to clogging of dust in the valve. There is a possibility that an abnormality will occur in which the piston does not move normally to the position that shuts off the flow. When such an abnormality of the control valve occurs, it may not be possible to maintain the car stop when the car lands on the stop floor. Therefore, a technique for detecting an abnormality in the control valve of the hydraulic power unit provided in the hydraulic elevator is required.
　本発明は、上述のような課題を解決するためになされたものであり、油圧パワーユニットの制御弁の異常を検出することができる油圧エレベータの異常検出装置、および既設油圧エレベータに対して油圧パワーユニットの制御弁の異常を検出する機能を付加する既設油圧エレベータの改修方法を得ることを目的とする。 The present invention has been made to solve the above problems, and an abnormality detection device for a hydraulic elevator that can detect an abnormality in a control valve of a hydraulic power unit, and a hydraulic power unit for an existing hydraulic elevator. It is an object of the present invention to obtain a method of rehabilitating an existing hydraulic elevator that adds a function of detecting an abnormality in a control valve.
　本発明における油圧エレベータの異常検出装置は、かごを昇降させる油圧ジャッキと、油圧ジャッキの油圧を制御する油圧パワーユニットに含まれる制御弁との間に設けられており、油圧パワーユニットと油圧ジャッキとを接続する油圧配管内の圧力を検出し、検出した圧力を検出圧力として出力する圧力センサと、油圧パワーユニットに含まれる制御弁を閉める弁閉制御が行われたタイミング以降に圧力センサから取得した検出圧力に基づいて、制御弁が異常であるか否かを判定し、制御弁が異常であると判定した場合、制御弁が異常であることを検出する異常判定部と、を備えたものである。 The abnormality detection device for a hydraulic elevator according to the present invention is provided between a hydraulic jack that raises and lowers a car and a control valve included in a hydraulic power unit that controls the hydraulic pressure of the hydraulic jack, and connects the hydraulic power unit and the hydraulic jack. The pressure sensor that detects the pressure in the hydraulic piping and outputs the detected pressure as the detected pressure, and the detected pressure obtained from the pressure sensor after the timing when the valve closing control that closes the control valve included in the hydraulic power unit is performed. Based on this, it is determined whether or not the control valve is abnormal, and when it is determined that the control valve is abnormal, an abnormality determination unit that detects that the control valve is abnormal is provided.
　本発明における既設油圧エレベータの改修方法は、かごを昇降させる油圧ジャッキと、油圧ジャッキの油圧を制御する油圧パワーユニットとを備えた既設の油圧エレベータを改修する既設油圧エレベータの改修方法であって、油圧ジャッキと、油圧パワーユニットに含まれる制御弁との間に、油圧パワーユニットと油圧ジャッキとを接続する油圧配管内の圧力を検出し、検出した圧力を検出圧力として出力する圧力センサを設けるステップと、油圧パワーユニットに含まれる制御弁を閉める弁閉制御が行われたタイミング以降に圧力センサから取得した検出圧力に基づいて、制御弁が異常であるか否かを判定し、制御弁が異常であると判定した場合、制御弁が異常であることを検出する異常判定部を設けるステップと、を備えたものである。 A method of repairing an existing hydraulic elevator in the present invention is a method of repairing an existing hydraulic elevator that repairs an existing hydraulic elevator that includes a hydraulic jack that raises and lowers a car, and a hydraulic power unit that controls the hydraulic pressure of the hydraulic jack. Between the jack and the control valve included in the hydraulic power unit, a step of detecting a pressure in the hydraulic pipe connecting the hydraulic power unit and the hydraulic jack and providing a pressure sensor for outputting the detected pressure as a detected pressure, Close the control valve included in the power unit Determine whether the control valve is abnormal based on the detected pressure obtained from the pressure sensor after the timing when the valve closing control is performed, and determine that the control valve is abnormal In that case, a step of providing an abnormality determination unit for detecting that the control valve is abnormal is provided.
　本発明によれば、油圧パワーユニットの制御弁の異常を検出することができる油圧エレベータの異常検出装置、および既設油圧エレベータに対して油圧パワーユニットの制御弁の異常を検出する機能を付加する既設油圧エレベータの改修方法を得ることができる。 ADVANTAGE OF THE INVENTION According to this invention, the abnormality detection apparatus of the hydraulic elevator which can detect the abnormality of the control valve of a hydraulic power unit, and the existing hydraulic elevator which adds the function which detects the abnormality of the control valve of a hydraulic power unit with respect to an existing hydraulic elevator. You can get the repair method.
本発明の実施の形態１における油圧エレベータを示す全体構成図である。1 is an overall configuration diagram showing a hydraulic elevator according to a first embodiment of the present invention. 本発明の実施の形態１における油圧エレベータの異常検出装置を示す構成図である。It is a block diagram which shows the abnormality detection apparatus of the hydraulic elevator in Embodiment 1 of this invention. 本発明の実施の形態１における油圧エレベータのかごの速度、および油圧エレベータの異常検出装置の圧力センサによって検出される検出圧力のそれぞれの時間変化の一例を示すタイミングチャートである。3 is a timing chart showing an example of changes over time in the speed of the cage of the hydraulic elevator and the detected pressure detected by the pressure sensor of the abnormality detection device for the hydraulic elevator according to Embodiment 1 of the present invention. 本発明の実施の形態１における油圧エレベータの異常検出装置によって行われる一連の異常検出処理を示すフローチャートである。3 is a flowchart showing a series of abnormality detection processing performed by the abnormality detection device for a hydraulic elevator according to the first embodiment of the present invention.
　以下、本発明による油圧エレベータの異常検出装置および既設油圧エレベータの改修方法を、好適な実施の形態にしたがって図面を用いて説明する。なお、図面の説明においては、同一部分または相当部分には同一符号を付し、重複する説明を省略する。 A hydraulic elevator abnormality detection device and an existing hydraulic elevator rehabilitation method according to the present invention will be described below with reference to the drawings according to a preferred embodiment. In the description of the drawings, the same or corresponding parts will be denoted by the same reference symbols, without redundant description.
　実施の形態１．
　図１は、本発明の実施の形態１における油圧エレベータを示す全体構成図である。図１において、昇降路内には、かご７を昇降させる油圧ジャッキ１が設けられている。油圧ジャッキ１は、昇降路の底部に固定されたシリンダ２と、シリンダ２に対して上下に移動可能なプランジャ３とを備える。プランジャ３の上端部には、そらせ車４が設けられている。 Embodiment 1.
FIG. 1 is an overall configuration diagram showing a hydraulic elevator according to Embodiment 1 of the present invention. In FIG. 1, a hydraulic jack 1 for raising and lowering a car 7 is provided in the hoistway. The hydraulic jack 1 includes a cylinder 2 fixed to the bottom of the hoistway, and a plunger 3 movable up and down with respect to the cylinder 2. A deflector wheel 4 is provided at the upper end of the plunger 3.
　シリンダ２には、油圧ジャッキ１の油圧を制御する油圧パワーユニット５が油圧配管６を介して接続されている。油圧ジャッキ１は、油圧パワーユニット５から油圧配管６内を通って流れる油によって動作する。油圧パワーユニット５は、油圧ポンプ５１、モータ５２、制御弁５３および油槽５４を含んで構成される。 A hydraulic power unit 5 that controls the hydraulic pressure of the hydraulic jack 1 is connected to the cylinder 2 via a hydraulic pipe 6. The hydraulic jack 1 is operated by oil flowing from the hydraulic power unit 5 through the hydraulic pipe 6. The hydraulic power unit 5 includes a hydraulic pump 51, a motor 52, a control valve 53, and an oil tank 54.
　モータ５２は、後述する制御装置１００による制御に従って駆動する。油圧ポンプ５１は、モータ５２が駆動することによって駆動し、油槽５４に貯められた油を油圧ジャッキ１に供給する。制御弁５３は、油圧配管６内の油の流路を開閉する。制御弁５３が開いている場合には、油圧パワーユニット５と油圧ジャッキ１との間で油の流れが発生する。一方、制御弁５３が閉じている場合には、油圧パワーユニット５と油圧ジャッキ１との間で油の流れが遮断される。 The motor 52 is driven under the control of the control device 100 described later. The hydraulic pump 51 is driven by the motor 52, and supplies the oil stored in the oil tank 54 to the hydraulic jack 1. The control valve 53 opens and closes the oil passage in the hydraulic pipe 6. When the control valve 53 is open, an oil flow occurs between the hydraulic power unit 5 and the hydraulic jack 1. On the other hand, when the control valve 53 is closed, the oil flow is shut off between the hydraulic power unit 5 and the hydraulic jack 1.
　制御弁５３は、後述する制御装置１００による制御に従って開閉する電磁弁と、電磁弁が開閉することによって移動するピストンとを含んで構成されている。 The control valve 53 includes a solenoid valve that opens and closes under the control of the control device 100 described later, and a piston that moves when the solenoid valve opens and closes.
　制御弁５３のピストンは、電磁弁の開閉によって、油圧パワーユニット５と油圧ジャッキ１との間で油の流れを発生させる開位置と、油圧パワーユニット５と油圧ジャッキ１との間で油の流れを遮断する閉位置との間を移動する。ピストンが開位置に位置する場合、すなわち、制御弁５３が開いている場合には、油圧パワーユニット５と油圧ジャッキ１との間で油の流れが発生する。一方、ピストンが閉位置に位置する場合、すなわち、制御弁５３が閉じている場合には、油圧パワーユニット５と油圧ジャッキ１との間で油の流れが遮断される。 The piston of the control valve 53 shuts off the oil flow between the hydraulic power unit 5 and the hydraulic jack 1 and the open position where an oil flow is generated between the hydraulic power unit 5 and the hydraulic jack 1 by opening and closing the solenoid valve. Move to and from the closed position. When the piston is in the open position, that is, when the control valve 53 is open, an oil flow is generated between the hydraulic power unit 5 and the hydraulic jack 1. On the other hand, when the piston is in the closed position, that is, when the control valve 53 is closed, the oil flow is shut off between the hydraulic power unit 5 and the hydraulic jack 1.
　そらせ車４には、かご７を吊り下げるロープ８が巻き掛けられている。ロープ８の一端部は、かご７に接続されており、ロープ８の他端部は、昇降路の固定部に接続されている。かご７は、油圧ジャッキ１のプランジャ３が上下方向に移動することによって、昇降路内を上下方向に走行する。 A rope 8 for suspending the basket 7 is wound around the deflecting car 4. One end of the rope 8 is connected to the car 7, and the other end of the rope 8 is connected to the fixed part of the hoistway. The car 7 travels vertically in the hoistway as the plunger 3 of the hydraulic jack 1 moves vertically.
　かご７が昇降路内を上方向に走行する場合には、油槽５４に貯められた油は、油圧ジャッキ１のシリンダ２内に流れる。かご７が下方向に走行する場合には、油圧ジャッキ１のシリンダ２内の油は、油槽５４に排出される。 When the car 7 travels upward in the hoistway, the oil stored in the oil tank 54 flows into the cylinder 2 of the hydraulic jack 1. When the car 7 travels downward, the oil in the cylinder 2 of the hydraulic jack 1 is discharged to the oil tank 54.
　かご７が停止階に着床して停止している場合には、制御弁５３のピストンが閉位置に位置し、制御弁５３が閉じている。ただし、かご７が停止階に着床して制御弁５３を閉める弁閉制御が行われた場合であっても、制御弁５３のピストンが閉位置に正常に移動しない、すなわち、制御弁５３が完全に閉まらない異常が発生すれば、制御弁５３が開いている状態となる。その結果、かご７の停止を維持することができない。 When the car 7 is landing on the stop floor and stopped, the piston of the control valve 53 is located at the closed position and the control valve 53 is closed. However, even when the car 7 is landed on the stop floor and the valve closing control is performed to close the control valve 53, the piston of the control valve 53 does not normally move to the closed position. If an abnormality occurs that the valve is not closed completely, the control valve 53 is in the open state. As a result, the suspension of the car 7 cannot be maintained.
　昇降路の上部には、綱車９が設けられており、昇降路の下部には、綱車１０が設けられている。綱車９および綱車１０には、ロープ１１がループ状に巻き掛けられている。ロープ１１の一端部および他端部は、かご７に接続されている。ロープ１１は、かご７の上下方向への走行に応じて移動する。綱車９および綱車１０は、ロープ１１の移動に応じて回転する。 A sheave 9 is provided above the hoistway, and a sheave 10 is provided below the hoistway. A rope 11 is wound around the sheave 9 and the sheave 10 in a loop shape. One end and the other end of the rope 11 are connected to the car 7. The rope 11 moves as the car 7 travels in the vertical direction. The sheave 9 and the sheave 10 rotate according to the movement of the rope 11.
　綱車９の回転軸には、かご７の位置を検出するためのエンコーダ１２が設けられている。エンコーダ１２は、綱車９の回転に応じた信号を出力する。かご７の位置は、エンコーダ１２によって出力された信号に基づいて検出される。 The rotary shaft of the sheave 9 is provided with an encoder 12 for detecting the position of the car 7. The encoder 12 outputs a signal according to the rotation of the sheave 9. The position of the car 7 is detected based on the signal output by the encoder 12.
　かご７には、かご７の出入口を開閉するかごドア１３が設けられている。かごドア１３は、かご７に設けられている駆動装置（図示せず）が後述する制御装置１００による制御に従って駆動することによって、移動する。油圧エレベータが設置される建物の各階の乗場には、乗場の出入口を開閉する乗場ドア１４が設けられている。乗場ドア１４は、かごドア１３の移動に伴って移動する。 The car 7 is provided with a car door 13 that opens and closes the entrance of the car 7. The car door 13 moves when a drive device (not shown) provided in the car 7 is driven under the control of the control device 100 described later. A hall door 14 for opening and closing a doorway of the hall is provided at the hall on each floor of the building where the hydraulic elevator is installed. The hall door 14 moves along with the movement of the car door 13.
　制御装置１００は、油圧エレベータの運転を制御する。より具体的には、制御装置１００は、油圧パワーユニット５を制御することによって、油圧パワーユニット５から油圧ジャッキ１への油の流動を制御する。すなわち、制御装置１００は、油圧ポンプ５１およびモータ５２の駆動と、制御弁５３の開閉とをそれぞれ制御することによって、油の流動を制御する。制御装置１００は、油の流動を制御することによって、油圧ジャッキ１のプランジャ３の位置を変化させてかご７の走行を制御する。 The control device 100 controls the operation of the hydraulic elevator. More specifically, the control device 100 controls the hydraulic power unit 5 to control the flow of oil from the hydraulic power unit 5 to the hydraulic jack 1. That is, the control device 100 controls the flow of oil by controlling the driving of the hydraulic pump 51 and the motor 52 and the opening and closing of the control valve 53, respectively. The control device 100 controls the travel of the car 7 by changing the position of the plunger 3 of the hydraulic jack 1 by controlling the flow of oil.
　異常検出装置２００は、圧力センサ２０１および異常判定部２０２を備える。圧力センサ２０１は、油圧ジャッキ１と、油圧パワーユニット５に含まれる制御弁５３との間に設けられている。圧力センサ２０１は、油圧パワーユニット５と油圧ジャッキ１とを接続する油圧配管６内の圧力を検出し、検出したその圧力を、検出圧力として異常判定部２０２に出力する。 The abnormality detection device 200 includes a pressure sensor 201 and an abnormality determination unit 202. The pressure sensor 201 is provided between the hydraulic jack 1 and the control valve 53 included in the hydraulic power unit 5. The pressure sensor 201 detects the pressure in the hydraulic pipe 6 that connects the hydraulic power unit 5 and the hydraulic jack 1, and outputs the detected pressure to the abnormality determination unit 202 as the detected pressure.
　異常判定部２０２は、油圧パワーユニット５に含まれる制御弁５３を閉める弁閉制御が行われたタイミング以降に圧力センサ２０１から取得した検出圧力に基づいて、制御弁５３が異常であるか否かを判定する。異常判定部２０２は、その判定の結果、制御弁５３が異常であると判定した場合に、制御弁５３が異常であることを検出する。 The abnormality determination unit 202 determines whether or not the control valve 53 is abnormal based on the detected pressure acquired from the pressure sensor 201 after the timing when the valve closing control for closing the control valve 53 included in the hydraulic power unit 5 is performed. judge. When it is determined that the control valve 53 is abnormal as a result of the determination, the abnormality determination unit 202 detects that the control valve 53 is abnormal.
　次に、異常検出装置２００の構成について、図２を参照しながらさらに説明する。図２は、本発明の実施の形態１における油圧エレベータの異常検出装置２００を示す構成図である。 Next, the configuration of the abnormality detection device 200 will be further described with reference to FIG. FIG. 2 is a configuration diagram showing an abnormality detecting device 200 for a hydraulic elevator according to the first embodiment of the present invention.
　図２において、かご７の走行を制御する制御装置１００は、かご７が停止階に着床するタイミングで、制御弁５３を閉める弁閉制御を行うための弁閉指令を、制御弁５３に出力する。これにより、制御弁５３が閉じられ、かご７が停止階に停止する。かご７が停止階に停止すれば、制御装置１００は、かご７に設けられている駆動装置を制御することで、かごドア１３を開ける。 In FIG. 2, the control device 100 that controls the traveling of the car 7 outputs a valve closing command for performing the valve closing control for closing the control valve 53 to the control valve 53 at the timing when the car 7 arrives at the stop floor. To do. As a result, the control valve 53 is closed and the car 7 stops at the stop floor. When the car 7 stops at the stop floor, the control device 100 controls the drive device provided in the car 7 to open the car door 13.
　ただし、制御弁５３の上述した異常が発生している場合、制御装置１００から制御弁５３に弁閉指令が入力されても、制御弁５３が開いている状態となる。つまり、かご７が停止階に着床して制御弁５３を閉める弁閉制御が行われても、制御弁５３が完全に閉まらない。その結果、かご７の停止を維持することができない。 However, when the above-mentioned abnormality of the control valve 53 occurs, the control valve 53 will be in the open state even if the control device 100 inputs a valve closing command to the control valve 53. That is, even if the car 7 is landed on the stop floor and the valve closing control for closing the control valve 53 is performed, the control valve 53 is not completely closed. As a result, the suspension of the car 7 cannot be maintained.
　制御装置１００は、制御弁５３に弁閉指令を出力する際に、異常検出装置２００の異常判定部２０２にもその弁閉指令を出力する。異常判定部２０２は、その弁閉指令が入力されれば、制御弁５３が閉じられる弁閉制御が制御装置１００によって行われたことを検知する。 When the control device 100 outputs a valve closing command to the control valve 53, the control device 100 also outputs the valve closing command to the abnormality determination unit 202 of the abnormality detection device 200. When the valve closing command is input, the abnormality determination unit 202 detects that the control device 100 has performed the valve closing control for closing the control valve 53.
　異常判定部２０２は、上述の弁閉制御が行われたタイミング、具体的には、制御装置１００から弁閉指令が入力されたタイミングから、予め設定された設定時間が経過する間に、圧力センサ２０１から検出圧力を取得する。異常判定部２０２は、その設定時間の間に取得した検出圧力の変動である圧力変動パターンを記憶する。 The abnormality determination unit 202 determines whether the pressure sensor is operated while a preset set time elapses from the timing when the valve closing control is performed, specifically, the timing when the valve closing command is input from the control device 100. The detected pressure is acquired from 201. The abnormality determination unit 202 stores the pressure fluctuation pattern which is the fluctuation of the detected pressure acquired during the set time.
　続いて、異常判定部２０２は、記憶した上述の圧力変動パターンと、予め記憶している基準圧力変動パターンとを比較する。基準圧力変動パターンは、上述の弁閉制御が行われた場合に制御弁５３が正常に動作するときの、油圧パワーユニット５と油圧ジャッキ１とを接続する油圧配管６内の圧力の変動パターンである。 Subsequently, the abnormality determination unit 202 compares the above-described stored pressure fluctuation pattern with the previously stored reference pressure fluctuation pattern. The reference pressure fluctuation pattern is a fluctuation pattern of the pressure in the hydraulic pipe 6 connecting the hydraulic power unit 5 and the hydraulic jack 1 when the control valve 53 normally operates when the above-mentioned valve closing control is performed. ..
　上述の基準圧力変動パターンは、予め求められ、異常判定部２０２に記憶される。具体的には、基準圧力変動パターンは、例えば、制御弁５３が正常に動作する場合に油圧エレベータの運転を実際に行って圧力センサ２０１から検出圧力を取得することによって求められる。基準圧力変動パターンは、このような運転を定期的に行うことによって、適宜変更してもよい。 The above-mentioned reference pressure fluctuation pattern is obtained in advance and stored in the abnormality determination unit 202. Specifically, the reference pressure fluctuation pattern is obtained, for example, by actually operating the hydraulic elevator when the control valve 53 operates normally and acquiring the detected pressure from the pressure sensor 201. The reference pressure fluctuation pattern may be changed as appropriate by regularly performing such an operation.
　異常判定部２０２は、上述の比較の結果、圧力変動パターンの基準圧力変動パターンからのずれが、予め設定される許容範囲である場合、制御弁５３が正常であると判定する。一方、異常判定部２０２は、このずれが許容範囲でない場合、制御弁５３が異常であると判定する。異常判定部２０２は、制御弁５３が異常であると判定すると、制御弁５３が異常であることを検出する。 The abnormality determination unit 202 determines that the control valve 53 is normal when the deviation of the pressure fluctuation pattern from the reference pressure fluctuation pattern is within a preset allowable range as a result of the above comparison. On the other hand, the abnormality determination unit 202 determines that the control valve 53 is abnormal when the deviation is not within the allowable range. When the abnormality determination unit 202 determines that the control valve 53 is abnormal, the abnormality determination unit 202 detects that the control valve 53 is abnormal.
　ここで、上述の基準圧力変動パターンの一例について、図３を参照しながら説明する。図３は、本発明の実施の形態１における油圧エレベータのかご７の速度、および油圧エレベータの異常検出装置２００の圧力センサ２０１によって検出される検出圧力のそれぞれの時間変化の一例を示すタイミングチャートである。 Here, an example of the above-mentioned reference pressure fluctuation pattern will be described with reference to FIG. FIG. 3 is a timing chart showing an example of changes over time in the speed of the cage 7 of the hydraulic elevator and the detected pressure detected by the pressure sensor 201 of the hydraulic elevator abnormality detection device 200 according to Embodiment 1 of the present invention. is there.
　なお、図３では、かご７の速度と、圧力センサ２０１によって検出される検出圧力とのそれぞれについて、制御弁５３が正常である場合の挙動を実線で示し、制御弁５３が異常である場合の挙動を破線で示している。 In FIG. 3, the behavior of the control valve 53 when the speed of the car 7 and the detected pressure detected by the pressure sensor 201 are normal is shown by a solid line, and the behavior when the control valve 53 is abnormal. The behavior is shown by a broken line.
　図３に示すように、制御弁５３が正常であれば、上述の弁閉制御が行われたタイミング以降、制御弁５３が正常に閉まり、かご７が正常に停止する。一方、制御弁５３が異常であれば、このタイミング以降であっても、制御弁５３が完全に閉まらず、かご７の停止を維持することができない。また、図３に示すように、制御弁５３が正常である場合の検出圧力の変動パターンと、制御弁５３が異常である場合の検出圧力の変動パターンとが相違している。 As shown in FIG. 3, if the control valve 53 is normal, the control valve 53 is normally closed and the car 7 is normally stopped after the timing when the above-mentioned valve closing control is performed. On the other hand, if the control valve 53 is abnormal, even after this timing, the control valve 53 is not completely closed and the car 7 cannot be stopped. Further, as shown in FIG. 3, the fluctuation pattern of the detected pressure when the control valve 53 is normal is different from the fluctuation pattern of the detected pressure when the control valve 53 is abnormal.
　したがって、制御弁５３が正常である場合の検出圧力の変動パターンに相当する基準圧力変動パターンと、上述の圧力変動パターンとを比較することによって、制御弁５３が正常であるか異常であるかを判定することが可能となる。 Therefore, whether the control valve 53 is normal or abnormal is compared by comparing the reference pressure fluctuation pattern corresponding to the fluctuation pattern of the detected pressure when the control valve 53 is normal with the above-mentioned pressure fluctuation pattern. It becomes possible to judge.
　圧力変動パターンの基準圧力変動パターンからのずれが許容範囲であるか否かを判定する手法としては、例えば、以下のような手法が考えられる。 As a method for determining whether the deviation of the pressure fluctuation pattern from the reference pressure fluctuation pattern is within the allowable range, for example, the following method can be considered.
　すなわち、異常判定部２０２は、上述の設定時間の間に取得された検出圧力の平均値と、基準圧力変動パターンにおける圧力の平均値との差分の大きさを演算する。続いて、異常判定部２０２は、その差分の大きさが予め設定される閾値を超えている場合には、上述のずれが許容範囲でないと判定する。一方、異常判定部２０２は、その差分の大きさがその閾値以下である場合には、上述のずれが許容範囲であると判定する。 That is, the abnormality determination unit 202 calculates the magnitude of the difference between the average value of the detected pressure acquired during the above-mentioned set time and the average value of the pressure in the reference pressure fluctuation pattern. Then, when the magnitude of the difference exceeds a preset threshold value, the abnormality determination unit 202 determines that the above deviation is not within the allowable range. On the other hand, when the magnitude of the difference is equal to or smaller than the threshold, the abnormality determining unit 202 determines that the above-mentioned deviation is within the allowable range.
　異常判定部２０２は、制御弁５３が異常であることを検出した場合、かご７が停止階に着床した場合であってもかごドア１３を閉めたままとする戸閉状態を維持する。具体的には、異常判定部２０２は、制御装置１００に異常判定信号を出力することによって、このような戸閉状態を維持する制御を制御装置１００に行わせる。 The abnormality determination unit 202 maintains the door closed state in which the car door 13 remains closed even when the control valve 53 is detected to be abnormal, even when the car 7 is landed on the stop floor. Specifically, the abnormality determination unit 202 outputs an abnormality determination signal to the control device 100 to cause the control device 100 to perform control for maintaining such a door closed state.
　このように、異常判定部２０２は、油圧パワーユニット５に含まれる制御弁５３を閉める弁閉制御が行われたタイミング以降に圧力センサ２０１から取得した検出圧力に基づいて、制御弁５３が異常であるか否かを判定する。具体的には、異常判定部２０２は、弁閉制御が行われたタイミングから設定時間が経過する間に圧力センサ２０１から検出圧力を取得することで得られる圧力変動パターンと、上述の基準圧力変動パターンとを比較することによって、制御弁５３が異常であるか否かを判定する。 As described above, the abnormality determination unit 202 has an abnormality in the control valve 53 based on the detected pressure acquired from the pressure sensor 201 after the timing when the valve closing control for closing the control valve 53 included in the hydraulic power unit 5 is performed. Or not. Specifically, the abnormality determination unit 202 obtains the pressure fluctuation pattern obtained by acquiring the detected pressure from the pressure sensor 201 during a set time period from the timing when the valve closing control is performed, and the above-described reference pressure fluctuation. By comparing with the pattern, it is determined whether the control valve 53 is abnormal.
　制御装置１００は、異常検出装置２００から異常判定信号が入力されれば、停止階に着床しているかご７のかごドア１３を開けず、かごドア１３を閉めたままとする上述の戸閉状態を維持する。さらに、制御装置１００は、戸閉状態を維持した上で、停止階から最下階にかご７を移動させ、かご７を最下階に着床させる。 When the abnormality determination signal is input from the abnormality detection device 200, the control device 100 does not open the car door 13 of the car 7 that is landing on the stop floor, but keeps the car door 13 closed. Stay in the state. Further, the control device 100 moves the car 7 from the stop floor to the bottom floor while keeping the door closed, and causes the car 7 to land on the bottom floor.
　制御装置１００は、かご７を最下階に着床させると、戸閉状態を解除し、かご７のかごドア１３を開ける。 The control device 100 releases the door-closed state and opens the car door 13 of the car 7 when the car 7 is landed on the lowest floor.
　次に、異常検出装置２００が制御弁５３の異常を検出する異常検出処理について、図４を参照しながら説明する。図４は、本発明の実施の形態１における油圧エレベータの異常検出装置２００によって行われる一連の異常検出処理を示すフローチャートである。 Next, an abnormality detection process in which the abnormality detection device 200 detects an abnormality in the control valve 53 will be described with reference to FIG. FIG. 4 is a flowchart showing a series of abnormality detection processing performed by the abnormality detection device 200 for the hydraulic elevator according to the first embodiment of the present invention.
　ステップＳ１０１において、異常判定部２０２は、制御装置１００から弁閉指令が入力されたか否かを判定する。この弁閉指令が入力されたと判定された場合には、処理がステップＳ１０２へと進み、この弁閉指令が入力されていないと判定された場合には、処理が終了となる。 In step S101, the abnormality determination unit 202 determines whether a valve closing command has been input from the control device 100. If it is determined that the valve closing command is input, the process proceeds to step S102, and if it is determined that the valve closing command is not input, the process ends.
　ステップＳ１０２において、異常判定部２０２は、ステップＳ１０１で弁閉指令が入力されてから設定時間が経過する間に、圧力センサ２０１から検出圧力を取得し、その設定時間の間に取得した検出圧力の変動である圧力変動パターンを記憶する。その後、処理がステップＳ１０３へと進む。 In step S102, the abnormality determination unit 202 acquires the detected pressure from the pressure sensor 201 during a set time period after the valve closing command is input in step S101, and detects the detected pressure during the set time period. The pressure fluctuation pattern that is fluctuation is stored. After that, the process proceeds to step S103.
　ステップＳ１０３において、異常判定部２０２は、ステップＳ１０２で記憶した圧力変動パターンと、基準圧力変動パターンとを比較する。その後、処理がステップＳ１０４へと進む。 In step S103, the abnormality determination unit 202 compares the pressure fluctuation pattern stored in step S102 with the reference pressure fluctuation pattern. After that, the process proceeds to step S104.
　ステップＳ１０４において、異常判定部２０２は、ステップＳ１０３での比較の結果、圧力変動パターンの基準圧力変動パターンからのずれが許容範囲であるか否かを判定する。このずれが許容範囲であると判定された場合には、処理がステップＳ１０５へと進み、このずれが許容範囲でないと判定された場合には、処理がステップＳ１０６へと進む。 In step S104, the abnormality determination unit 202 determines, as a result of the comparison in step S103, whether the deviation of the pressure fluctuation pattern from the reference pressure fluctuation pattern is within the allowable range. If it is determined that this deviation is within the allowable range, the processing proceeds to step S105, and if it is determined that this deviation is not within the allowable range, the processing proceeds to step S106.
　ステップＳ１０５において、異常判定部２０２は、制御弁５３が異常でない、すなわち、制御弁５３が正常であると判定する。その後、処理が終了となる。 In step S105, the abnormality determination unit 202 determines that the control valve 53 is not abnormal, that is, the control valve 53 is normal. Then, the process ends.
　ステップＳ１０６において、異常判定部２０２は、制御弁５３が異常であると判定する。この場合、異常判定部２０２は、上述したとおり、異常判定信号を制御装置１００に出力する。その後、処理が終了となる。 In step S106, the abnormality determination unit 202 determines that the control valve 53 is abnormal. In this case, the abnormality determination unit 202 outputs the abnormality determination signal to the control device 100, as described above. Then, the process ends.
　なお、本実施の形態１における油圧エレベータの異常検出装置２００は、新設の油圧エレベータに適用することもできるし、既設の油圧エレベータに適用することもできる。特に、油圧ジャッキ１と油圧パワーユニット５とを備えた既設油圧エレベータに適用した場合、例えば、以下のような手順によって、既設油圧エレベータを、上述の異常を検出する機能を付加した油圧エレベータに改修することができる。 The abnormality detection device 200 for a hydraulic elevator according to the first embodiment can be applied to a newly installed hydraulic elevator or an existing hydraulic elevator. In particular, when applied to an existing hydraulic elevator equipped with the hydraulic jack 1 and the hydraulic power unit 5, the existing hydraulic elevator is modified into a hydraulic elevator to which the above-mentioned abnormality detecting function is added, for example, by the following procedure. be able to.
　すなわち、既設油圧エレベータの油圧ジャッキ１と、既設エレベータの油圧パワーユニット５に含まれる制御弁５３との間に圧力センサ２０１を設けるステップが実行される。さらに、既設油圧エレベータに異常判定部２０２を設けるステップが実行される。なお、既設油圧エレベータに異常判定部２０２を設ける場合、既設油圧エレベータを制御する既設の制御装置に異常判定部２０２の機能を実装してもよいし、この制御装置とは別の独立した装置を新設し、この装置に異常判定部２０２の機能を実装してもよい。 That is, the step of providing the pressure sensor 201 between the hydraulic jack 1 of the existing hydraulic elevator and the control valve 53 included in the hydraulic power unit 5 of the existing elevator is executed. Further, the step of providing the abnormality determination unit 202 in the existing hydraulic elevator is executed. When the abnormality determination unit 202 is provided in the existing hydraulic elevator, the function of the abnormality determination unit 202 may be installed in an existing control device that controls the existing hydraulic elevator, or an independent device other than this control device may be installed. The device may be newly installed and the function of the abnormality determination unit 202 may be installed in this device.
　以上、本実施の形態１によれば、油圧エレベータの異常検出装置２００は、油圧ジャッキ１と、油圧パワーユニット５に含まれる制御弁５３との間に設けられている圧力センサ２０１と、制御弁５３が異常であるか否かを判定し、制御弁５３が異常であると判定した場合、制御弁５３が異常であることを検出する異常判定部２０２とを備えて構成されている。また、圧力センサ２０１は、油圧パワーユニット５と油圧ジャッキ１とを接続する油圧配管６内の圧力を検出し、検出した圧力を検出圧力として出力するように構成されている。さらに、異常判定部２０２は、制御弁５３を閉める弁閉制御が行われたタイミング以降に圧力センサ２０１から取得した検出圧力に基づいて、制御弁が異常であるか否かを判定するように構成されている。 As described above, according to the first embodiment, the hydraulic elevator abnormality detection device 200 includes the pressure sensor 201 provided between the hydraulic jack 1 and the control valve 53 included in the hydraulic power unit 5, and the control valve 53. Is abnormal, and when it is determined that the control valve 53 is abnormal, an abnormality determination unit 202 that detects that the control valve 53 is abnormal is provided. Further, the pressure sensor 201 is configured to detect the pressure in the hydraulic pipe 6 that connects the hydraulic power unit 5 and the hydraulic jack 1 and output the detected pressure as the detected pressure. Further, the abnormality determination unit 202 is configured to determine whether or not the control valve is abnormal based on the detected pressure acquired from the pressure sensor 201 after the timing when the valve closing control for closing the control valve 53 is performed. Has been done.
　これにより、油圧エレベータに設けられている油圧パワーユニット５の制御弁５３の異常、すなわち、かご７が停止階に着床して制御弁５３を閉める制御が行われても制御弁５３が完全に閉まらない異常を検出することが可能となる。 As a result, even if the control valve 53 of the hydraulic power unit 5 provided in the hydraulic elevator is abnormal, that is, the control of closing the control valve 53 by the car 7 landing on the stop floor is not completely closed. It is possible to detect anomalies that are not present.
　また、油圧エレベータの異常検出装置２００は、上述の構成に対して、制御弁５３が異常であることを検出した場合、かご７が停止階に着床した場合であってもかごドア１３を閉めたままとする戸閉状態を維持するように構成されている。これにより、かご７が停止階に着床した際にかご７の停止を維持することができない状況において、かごドア１３が開くことを防止することができる。また、かごドア１３が開いた状態でかご７が走行することを防止することができる。 Further, the hydraulic elevator abnormality detection device 200 closes the car door 13 when the control valve 53 is detected to be abnormal with respect to the above-described configuration, even when the car 7 is landed on the stop floor. It is configured to maintain a closed state that is left open. As a result, it is possible to prevent the car door 13 from opening in a situation where the car 7 cannot be kept stopped when the car 7 reaches the stop floor. Further, it is possible to prevent the car 7 from traveling with the car door 13 opened.
　また、上述の油圧エレベータの異常検出装置２００を既設油圧エレベータに適用することによって、既設油圧エレベータに設けられる油圧パワーユニットの制御弁の異常を検出する機能を既設油圧エレベータに付加することができる。 Further, by applying the above-described hydraulic elevator abnormality detection device 200 to an existing hydraulic elevator, it is possible to add a function of detecting an abnormality in a control valve of a hydraulic power unit provided in the existing hydraulic elevator to the existing hydraulic elevator.
　なお、上述した実施の形態１における異常検出装置２００の異常判定部２０２の機能は、処理回路によって実現される。異常判定部２０２の機能を実現する処理回路は、専用のハードウェアであってもよく、メモリに格納されるプログラムを実行するプロセッサであってもよい。 The function of the abnormality determination unit 202 of the abnormality detection device 200 according to the first embodiment described above is realized by a processing circuit. The processing circuit that realizes the function of the abnormality determination unit 202 may be dedicated hardware or a processor that executes a program stored in the memory.
　処理回路が専用のハードウェアである場合、処理回路は、例えば、単一回路、複合回路、プログラム化したプロセッサ、並列プログラム化したプロセッサ、ＡＳＩＣ（Ａｐｐｌｉｃａｔｉｏｎ　Ｓｐｅｃｉｆｉｃ　Ｉｎｔｅｇｒａｔｅｄ　Ｃｉｒｃｕｉｔ）、ＦＰＧＡ（Ｆｉｅｌｄ　Ｐｒｏｇｒａｍｍａｂｌｅ　Ｇａｔｅ　Ａｒｒａｙ）、またはこれらを組み合わせたものが該当する。 When the processing circuit is dedicated hardware, the processing circuit is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), or an FPGA (Field Programmable Gate Array). , Or a combination of these.
　一方、処理回路がプロセッサの場合、異常判定部２０２の機能は、ソフトウェア、ファームウェア、またはソフトウェアとファームウェアとの組み合わせにより実現される。ソフトウェアおよびファームウェアは、プログラムとして記述され、メモリに格納される。プロセッサは、メモリに記憶されたプログラムを読み出して実行することにより、異常判定部２０２の機能を実現する。 On the other hand, when the processing circuit is a processor, the function of the abnormality determination unit 202 is realized by software, firmware, or a combination of software and firmware. Software and firmware are described as programs and stored in memory. The processor realizes the function of the abnormality determination unit 202 by reading and executing the program stored in the memory.
　なお、上述した異常判定部２０２の機能について、一部を専用のハードウェアで実現し、一部をソフトウェアまたはファームウェアで実現するようにしてもよい。 The functions of the abnormality determination unit 202 described above may be partially implemented by dedicated hardware and partially implemented by software or firmware.
　このように、処理回路は、ハードウェア、ソフトウェア、ファームウェア、またはこれらの組み合わせによって、上述した異常判定部２０２の機能を実現することができる。 As described above, the processing circuit can realize the above-described function of the abnormality determination unit 202 by hardware, software, firmware, or a combination thereof.
　１　油圧ジャッキ、２　シリンダ、３　プランジャ、４　そらせ車、５　油圧パワーユニット、６　油圧配管、７　かご、８　ロープ、９　綱車、１０　綱車、１１　ロープ、１２　エンコーダ、１３　かごドア、１４　乗場ドア、５１　油圧ポンプ、５２　モータ、５３　制御弁、５４　油槽、１００　制御装置、２００　異常検出装置、２０１　圧力センサ、２０２　異常判定部。 1 hydraulic jack, 2 cylinder, 3 plunger, 4 baffle car, 5 hydraulic power unit, 6 hydraulic piping, 7 car, 8 rope, 9 sheave, 10 sheave, 11 rope, 12 encoder, 13 car door, 14 landing door, 51 hydraulic pump, 52 motor, 53 control valve, 54 oil tank, 100 control device, 200 abnormality detection device, 201 pressure sensor, 202 abnormality determination unit.

Claims (4)

  1. 　かごを昇降させる油圧ジャッキと、前記油圧ジャッキの油圧を制御する油圧パワーユニットに含まれる制御弁との間に設けられており、前記油圧パワーユニットと前記油圧ジャッキとを接続する油圧配管内の圧力を検出し、検出した前記圧力を検出圧力として出力する圧力センサと、
    　前記油圧パワーユニットに含まれる前記制御弁を閉める弁閉制御が行われたタイミング以降に前記圧力センサから取得した前記検出圧力に基づいて、前記制御弁が異常であるか否かを判定し、前記制御弁が異常であると判定した場合、前記制御弁が異常であることを検出する異常判定部と、
    　を備えた油圧エレベータの異常検出装置。     It is provided between a hydraulic jack that raises and lowers a car and a control valve included in a hydraulic power unit that controls the hydraulic pressure of the hydraulic jack, and detects the pressure in a hydraulic pipe that connects the hydraulic power unit and the hydraulic jack. And a pressure sensor that outputs the detected pressure as a detected pressure,
    Based on the detected pressure obtained from the pressure sensor after the timing when the valve closing control for closing the control valve included in the hydraulic power unit is performed, it is determined whether the control valve is abnormal, and the control is performed. If it is determined that the valve is abnormal, an abnormality determination unit that detects that the control valve is abnormal,
    Abnormality detection device for hydraulic elevator equipped with.
  2. 　前記異常判定部は、
    　　前記弁閉制御が行われた前記タイミングから設定時間が経過する間に、前記圧力センサから前記検出圧力を取得し、
    　　前記設定時間の間に取得した前記検出圧力の変動である圧力変動パターンと、前記弁閉制御が行われた場合に前記制御弁が正常に動作するときの前記圧力の変動パターンである基準圧力変動パターンとを比較することによって、前記制御弁が異常であるか否かを判定する
    　請求項１に記載の油圧エレベータの異常検出装置。     The abnormality determination unit,
    While the set time has elapsed from the timing when the valve closing control is performed, the detected pressure is acquired from the pressure sensor,
    A pressure fluctuation pattern that is the fluctuation of the detected pressure acquired during the set time, and a reference pressure fluctuation that is the fluctuation pattern of the pressure when the control valve normally operates when the valve closing control is performed. The hydraulic elevator abnormality detection device according to claim 1, wherein it is determined whether or not the control valve is abnormal by comparing with a pattern.
  3. 　前記異常判定部は、
    　　前記制御弁が異常であることを検出した場合、前記かごが停止階に着床した場合であっても前記かごに設けられているかごドアを閉めたままとする戸閉状態を維持する
    　請求項１または２に記載の油圧エレベータの異常検出装置。     The abnormality determination unit,
    When it is detected that the control valve is abnormal, the door closed state is maintained in which the car door provided in the car is kept closed even when the car is landed on the stop floor. The abnormality detection device for a hydraulic elevator according to 1 or 2.
  4. 　かごを昇降させる油圧ジャッキと、前記油圧ジャッキの油圧を制御する油圧パワーユニットとを備えた既設の油圧エレベータを改修する既設油圧エレベータの改修方法であって、
    　前記油圧ジャッキと、前記油圧パワーユニットに含まれる制御弁との間に、前記油圧パワーユニットと前記油圧ジャッキとを接続する油圧配管内の圧力を検出し、検出した前記圧力を検出圧力として出力する圧力センサを設けるステップと、
    　前記油圧パワーユニットに含まれる前記制御弁を閉める弁閉制御が行われたタイミング以降に前記圧力センサから取得した前記検出圧力に基づいて、前記制御弁が異常であるか否かを判定し、前記制御弁が異常であると判定した場合、前記制御弁が異常であることを検出する異常判定部を設けるステップと、
    　を備えた既設油圧エレベータの改修方法。     A method of rehabilitating an existing hydraulic elevator for rehabilitating an existing hydraulic elevator equipped with a hydraulic jack for raising and lowering a car and a hydraulic power unit for controlling the hydraulic pressure of the hydraulic jack,
    A pressure sensor that detects the pressure in a hydraulic pipe connecting the hydraulic power unit and the hydraulic jack between the hydraulic jack and a control valve included in the hydraulic power unit, and outputs the detected pressure as detected pressure. The step of providing
    Based on the detected pressure obtained from the pressure sensor after the timing when the valve closing control for closing the control valve included in the hydraulic power unit is performed, it is determined whether the control valve is abnormal, and the control is performed. If it is determined that the valve is abnormal, a step of providing an abnormality determination unit that detects that the control valve is abnormal,
    Rehabilitation method of existing hydraulic elevator equipped with.
PCT/JP2018/047761 2018-12-26 2018-12-26 Device for detecting defect in hydraulic elevator and method for repairing existing hydraulic elevator WO2020136739A1 (en)

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Cited By (2)

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CN114034499A (en) * 2021-11-09 2022-02-11 山东钢铁集团日照有限公司 Gas chamber piston running state monitoring device and method
CN115196473A (en) * 2022-06-30 2022-10-18 广州广日股份有限公司研究院 Elevator car door foreign matter detection device, elevator car door and car door foreign matter detection method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114034499A (en) * 2021-11-09 2022-02-11 山东钢铁集团日照有限公司 Gas chamber piston running state monitoring device and method
CN115196473A (en) * 2022-06-30 2022-10-18 广州广日股份有限公司研究院 Elevator car door foreign matter detection device, elevator car door and car door foreign matter detection method

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