Clearance measuring device

Abstract

To provide a clearance measuring device capable of reducing a moving burden of a maintenance person when measuring a clearance between a counterweight and a buffer of an elevator.SOLUTION: The clearance measuring device calculates an actually measured number of pulses output during a period in which the car moves from when the door zone detecting device detects the entry of the car to the uppermost floor door zone entry position to when the car stops at a position above the uppermost floor door zone entry position, converts the actually measured number of pulses into an actually measured distance by which the car moves, and calculates a calculated distance from the uppermost floor level position to the complete stop position from a reference distance from the uppermost floor door zone entry position to the uppermost floor level position and the actually measured distance. The clearance measuring device receives an input of a measured value of the clearance in a state where the car is stopped at a complete stop position, and calculates the clearance in a state where the car is stopped at the uppermost floor level position from the received measured value and the calculated distance.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a clearance measurement device that measures the clearance of an elevator counterweight. [Background technology]

[0002] Patent Document 1 describes a method for measuring the clearance between an elevator's counterweight and buffer. According to this method, a maintenance worker installs a measuring device in the pit of the elevator shaft on top of the buffer to measure the distance to the counterweight. The maintenance worker then exits the elevator shaft, sets the elevator to automatic mode, and registers a call for the car to the top floor, causing the car to stop at the top floor landing. The maintenance worker then performs measurements using the measuring device and receives the measurement results on a mobile device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-193078 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology of Patent Document 1, when measuring the clearance between the counterweight and the buffer, the maintenance personnel must work inside the pit of the elevator shaft and then leave the shaft to work in order to operate the elevator automatically. This poses a problem in that the maintenance personnel have to travel a lot when measuring the clearance.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a clearance measurement device that can reduce the travel burden on maintenance personnel when measuring the clearance between an elevator's counterweight and buffer. [Means for solving the problem]

[0006] The clearance measurement device disclosed herein is a clearance measurement device that measures the clearance between a buffer placed in a pit in an elevator shaft and a counterweight, and is equipped with a pulse generator that generates pulses corresponding to the distance traveled by the car, a memory device that stores position information for the top floor door zone entry position, which is the entry position into the up door zone on the top floor, and the top floor level position, which is the floor level position of the top floor, a door zone detection device that detects the entry of the car into the top floor door zone entry position, an elevator control device that performs complete stop control by manually operating the ascending car to stop it at a position above the top floor door zone entry position during elevator inspection, and a calculation device that calculates the clearance when the car is stopped at the top floor level position. The calculation device is configured to perform the following steps: a first process for calculating the number of measured pulses output from the pulse generator during the period from when the door zone detection device detects the car entering the top floor door zone entry position until the car is stopped by complete stop control; a second process for converting the number of measured pulses into the actual distance traveled by the car; a third process for calculating the calculated distance from the top floor level position to the complete stop position by complete stop control based on the reference distance from the top floor door zone entry position to the top floor level position obtained from the position information and the actual distance; a fourth process for accepting input of the measurement value of the clearance measured in the pit when the car is stopped at the complete stop position; and a fifth process for calculating the clearance when the car is stopped at the top floor level position based on the measurement value and calculated distance accepted in the fourth process. [Effects of the Invention]

[0007] In order for a maintenance worker to operate an elevator car from within the pit of the elevator shaft, manual operation is required. However, manual operation from within the pit makes it difficult to accurately stop the car at the top floor level position. The clearance measurement device disclosed herein makes it possible to measure the clearance when the elevator car is stopped at the top floor level position without having to perform any operation to stop the elevator car at the top floor level position. This allows the maintenance worker to measure the clearance while in the pit, thereby reducing the burden of movement on the maintenance worker when measuring the clearance. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram schematically illustrating an elevator device to which a clearance measurement device according to an embodiment is applied; [Figure 2] 1 is a block diagram showing a configuration of a clearance measurement device according to an embodiment; [Figure 3] FIG. 1 is a diagram for explaining a method for measuring a CWT clearance. [Figure 4] 4 is a flowchart of a routine executed by the elevator controller during an elevator inspection. [Figure 5] FIG. 2 is a block diagram showing the functions of a computing device according to an embodiment. [Figure 6] 10 is a flowchart showing a routine of a CWT clearance measurement process executed in a calculation device. [Figure 7] FIG. 10 is a diagram showing an example of a CWT clearance measurement screen displayed on the maintenance terminal. [Figure 8] FIG. 2 illustrates an example of hardware resources of a computing device. [Figure 9] FIG. 10 is a diagram illustrating another example of hardware resources of a computing device. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment will be described with reference to the drawings. Elements common to the various drawings will be designated by the same reference numerals, and duplicated explanations will be omitted.

[0010] Embodiment 1. Elevator equipment configuration FIG. 1 is a diagram schematically illustrating an elevator system to which a clearance measurement device according to an embodiment of the present invention is applied. The elevator system includes a car 1 and a counterweight 2. The car 1 moves up and down in a hoistway 3. The car 1 and counterweight 2 are suspended in the hoistway 3 by a main rope 4. The counterweight 2 moves in the hoistway 3 in the direction opposite to the direction in which the car 1 moves. The counterweight is also abbreviated as "CWT."

[0011] The main rope 4 is wound around a drive sheave 6 of a hoisting machine 5. The car 1 and the counterweight 2 move in accordance with the rotation of the drive sheave 6. That is, the car 1 and the counterweight 2 are driven by the hoisting machine 5. The hoisting machine 5 is controlled by a control panel 10. That is, the movement of the car 1 is controlled by the control panel 10. FIG. 1 shows an example in which the hoisting machine 5 and the control panel 10 are provided in a pit 3a of the hoistway 3. The hoisting machine 5 and the control panel 10 may also be provided at the top of the hoistway 3.

[0012] In Figure 1, car 1 stopped at hall 8a on the top floor is shown by a solid line. The counterweight 2 when car 1 is stopped at hall 8a is shown by a solid line. In Figure 1, car 1 stopped at hall 8b on the bottom floor and car 1 moving toward the top floor are shown by a dashed dotted line. In the following, when it is not necessary to specify which floor the hall is on, the hall will be designated by the symbol 8.

[0013] A shock absorber 9 for the counterweight 2 is provided in the pit 3a of the elevator shaft 3. The shock absorber 9 is disposed directly below the counterweight 2. FIG. 1 shows an example in which the shock absorber 9 is of a spring type. The shock absorber 9 may also be of a hydraulic type.

[0014] A governor 12 is installed at the top of the hoistway 3. The governor 12 has a governor sheave 14. A governor rope 16 is wound around the governor sheave 14. The governor rope 16 is laid in a loop inside the hoistway 3 and connected to the car 1. The governor rope 16 is also wound around a tension wheel (not shown) that is arranged at the bottom of the hoistway 3.

[0015] The governor sheave 14 rotates as the car 1 rises and falls. That is, when the car 1 rises and falls, the governor rope 16 moves in a circulating manner, and the governor sheave 14 rotates at a rotational speed corresponding to the running speed of the car 1. The governor sheave 14 is provided with a pulse generator 20 that generates pulses corresponding to the moving distance of the car 1. The moving distance of the car 1 is proportional to, for example, the number of pulses generated during that time. As the pulse generator 20, for example, an encoder or resolver that generates a pulse signal corresponding to the rotation of the governor sheave 14 is used. The pulse generator 20 may be installed in the hoist 5 as a device that generates a signal corresponding to the rotation of the drive sheave 6 of the hoist 5. The pulses output from the pulse generator 20 are sent to the control panel 10 and counted.

[0016] The elevator device includes a door zone detection device 22. The door zone detection device 22 is a device that detects the presence of the car 1 in the door zone of each landing 8. The door zone here is a door openable range in which the doors of the car 1 are permitted to open, and is a range that extends upward and downward from the floor level of each landing 8. The door zone detection device 22 includes, for example, a plate 24 and a sensor 26. The plate 24 is provided on a fixed body of the hoistway 3. The sensor 26 is provided on the car 1. The sensor 26 outputs a floor landing signal when it detects the plate 24. The plate 24 is an example of an object to be detected by the sensor 26. The plate 24 is arranged in a position in the door zone of each landing 8 that can be detected by the sensor 26.

[0017] At each landing 8, the up door zone into which an upbound car 1 enters does not coincide with the down door zone into which a downbound car 1 enters. For this reason, at each landing 8, a plate 24 corresponding to the up door zone and a plate 24 corresponding to the down door zone are respectively provided. FIG. 1 illustrates the plate 24 corresponding to the up door zone on the top floor. In the following description, the entry position into the up door zone on the top floor is referred to as the "top floor door zone entry position," and the position at floor level of the top floor is referred to as the "top floor level position." The floor arrival signal output from the door zone detection device 22 is sent to the control panel 10.

[0018] The elevator device is equipped with a first limit switch 30 and a second limit switch 32. The first limit switch 30 outputs an ON signal when it detects that the car 1 has traveled to a first position above the top floor level position. The second limit switch 32 outputs an ON signal when it detects that the car 1 has traveled to a second position below the top floor door zone entry position. The first limit switch 30 and the second limit switch 32 are installed on a fixed body of the elevator shaft 3. The signals output from the first limit switch 30 and the second limit switch 32 are each sent to the control panel 10.

[0019] 2.Configuration of clearance measurement device 2 is a block diagram showing the configuration of a clearance measurement device according to an embodiment. The clearance measurement device includes the above-described control panel 10, pulse generator 20, door zone detection device 22, first limit switch 30, second limit switch 32, and maintenance terminal 40. The control panel 10 includes a maintenance switch 52, an elevator control device 54, a storage device 56, and an arithmetic unit 60. The pulse generator 20, door zone detection device 22, first limit switch 30, and second limit switch 32 are electrically connected to the control panel 10.

[0020] The maintenance switch 52 is a switch that allows a maintenance person to switch the elevator's operating mode setting between normal mode and maintenance mode. The maintenance signal from the maintenance switch 52 is sent to the elevator control device 54. During normal elevator operation, the maintenance switch 52 is set to normal mode. When a maintenance person inspects or checks the elevator, he or she first operates the maintenance switch 52 to set the operating mode to maintenance mode. When the operating mode is in maintenance mode, the elevator control device 54 does not issue an alarm indicating an abnormality even if it detects elevator operation that would normally be determined to be abnormal.

[0021] The elevator control device 54 controls the landing position of the car 1 at each hall 8 based on the landing signal and the pulse count value. The elevator control device 54 also switches the elevator operation mode based on a maintenance signal. The elevator control device 54 also has a function to switch the elevator operation mode between an automatic operation mode and a manual operation mode. The automatic operation mode is an operation mode in which the car 1 automatically responds to registered calls. The manual operation mode is an operation mode in which a maintenance worker or the like manually moves the car 1 by operating dedicated equipment. In the manual operation mode, a hall call is not registered even if a direction button (not shown) is pressed at a hall 8. Also, a car call is not registered even if a destination button (not shown) is pressed inside the car 1. The operation mode is switched, for example, from an operation panel (not shown) inside the car 1.

[0022] When the elevator control device 54 receives an ON signal from the first limit switch 30 during an elevator inspection in an inspection mode described below, it executes full stop control, which decelerates and forcibly stops the car 1. If the car 1 stops due to full stop control, the car 1 will not start running again even if a maintenance worker or the like operates dedicated equipment. Furthermore, when the elevator control device 54 receives an ON signal from the second limit switch 32 during an elevator inspection in an inspection mode described below, it executes temporary stop control, which decelerates and forcibly stops the car 1. If the car 1 stops temporarily due to temporary stop control, the car 1 will start running again if a maintenance worker or the like operates dedicated equipment.

[0023] The storage device 56 is a device that stores various data related to elevator control. The elevator control device periodically learns the top floor level position (mm) and the top floor door zone entry position (mm), and stores the position information in the storage device 56.

[0024] The maintenance terminal 40 is a maintenance computer used by elevator maintenance personnel during inspection work. The maintenance terminal 40 transmits and receives information between the elevator control device 54 and the arithmetic device 60 by connecting to, for example, the control panel 10. Note that the maintenance terminal 40 may also be connected to the control panel 10 via, for example, a public line.

[0025] For elevator safety reasons, the distance L formed between the counterweight 2 and the buffer 9 must be within a standard range when the car 1 is stopped at the top floor level position at the top floor landing 8a. The distance L when the car 1 is stopped at the top floor level position at the top floor landing 8a is hereinafter also referred to as the "CWT clearance." The calculation device 60 is a device for performing calculation processing related to measuring the CWT clearance when the elevator mode is set to the periodic inspection mode. This calculation processing is hereinafter referred to as the "CWT clearance measurement processing." Figure 3 is a diagram for explaining a method for measuring the CWT clearance. Below, a method for measuring the CWT clearance using the functions of the calculation device 60 will be described in detail with reference to Figure 3 as well.

[0026] 3. CWT clearance measurement operation CWT clearance measurement is performed, for example, during a periodic inspection of an elevator. A maintenance worker gets into car 1 and stops car 1 at the landing 8 one floor above the lowest floor. Before getting off, the maintenance worker switches the operation mode from automatic operation mode to manual operation mode while inside car 1. The maintenance worker enters pit 3a from landing 8b on the lowest floor. The maintenance worker then sets maintenance switch 52 to maintenance mode. The maintenance worker also connects maintenance terminal 40 to control panel 10 and sets the elevator mode to periodic inspection mode from maintenance terminal 40. In periodic inspection mode, the running speed of car 1 when operated manually is limited according to the car position. The calculation device 60 executes CWT clearance measurement processing during inspection of the elevator set to periodic inspection mode.

[0027] A maintenance technician manually operates dedicated equipment to instruct the elevator control device 54 on the elevator operations required for performing CWT clearance measurement processing in the calculation device 60. Figure 4 is a flowchart of a routine executed by the elevator control device during elevator inspection. The routine shown in Figure 4 starts from a state in which car 1 is parked at the lowest floor level position during an elevator inspection in which, for example, various elevator settings have been set to manual operation mode, maintenance mode, and periodic inspection mode.

[0028] In step S100, the elevator control device 54 determines whether a manual operation command has been issued. During a periodic inspection, a maintenance worker in the pit 3a first commands the elevator to travel upward. Here, the process of step S100 is repeatedly executed until a command to travel is received from the maintenance worker. When a command to travel is received from the maintenance worker, the process proceeds to step S102.

[0029] In step S102, the elevator control device 54 causes the car 1 to travel in the upward direction at a first set speed specified for the elevator. Here, the first set speed is, for example, 30 m / min. After the processing of step S102 is performed, the processing proceeds to step S104.

[0030] When the car 1 traveling in the upward direction reaches the second position, the second limit switch 32 detects an ON signal. In step S104, the elevator control device 54 determines whether or not an ON signal has been detected from the second limit switch 32. If the determination is negative, it is determined that the car 1 has not reached the second position, and the process returns to step S102, where the elevator continues traveling.

[0031] On the other hand, if the determination in step S104 is affirmative, it is determined that the car 1 has reached the second position, and the process proceeds to step S106. In step S106, the elevator control device 54 executes temporary stop control. As a result, the car 1 forcibly starts decelerating from the second position and is temporarily stopped at the temporary stop position. As a result, the counterweight 2 is temporarily stopped before descending into the pit 3a. After the process in step S106 is performed, the process proceeds to step S108.

[0032] When elevator car 1 and counterweight 2 are temporarily stopped, the maintenance person confirms safety and then manually issues an instruction to restart the elevator. Here, while the maintenance person continues to press the instruction button for the restart instruction, the instruction to restart is sent to elevator control device 54. In step S108, elevator control device 54 determines whether an instruction to restart the elevator has been issued. If the determination is negative, the process returns to step S106, where elevator car 1 is temporarily stopped, and if the determination is positive, the process proceeds to step S110.

[0033] In step S110, the elevator control device 54 causes the car 1 to travel in the upward direction at a second set speed specified for the elevator. The second set speed here is slower than the first set speed, for example, 4 m / min. After the processing of step S110 is performed, the processing proceeds to step S112.

[0034] In step S112, the elevator control device 54 determines whether an ON signal from the first limit switch 30 has been detected. When the car 1 reaches the first position, the first limit switch 30 detects an ON signal. Therefore, if the determination in step S112 is negative, it is determined that the car 1 has not reached the first position, and the process returns to step S108 again. In this way, according to the processes in steps S106 to S112, until the car 1 reaches the first position, when the travel button is pressed by the maintenance worker, the car 1 travels at the second set speed, and when the travel button is released, the car 1 is temporarily stopped.

[0035] If the determination in step S112 is positive, it is determined that car 1 has reached the first position, and the process proceeds again to step S114. In step S114, elevator control device 54 executes complete stop control to forcibly decelerate and stop elevator car 1. The position at which elevator car 1 stops by complete stop control is hereinafter referred to as the "complete stop position." After elevator car 1 has come to a complete stop, elevator control device 54 will not cause the car to run even if it receives a command to resume running by operating the run button. Once step S114 is executed, the process of this routine ends.

[0036] The calculation device 60 executes a CWT clearance measurement process while the periodic inspection routine shown in Fig. 4 is being executed. Fig. 5 is a block diagram showing the functions of the calculation device according to the embodiment. The calculation device 60 includes a first processing unit 61, a second processing unit 62, a third processing unit 63, a fourth processing unit 64, a fifth processing unit 65, and a sixth processing unit 66 as functional blocks that execute the CWT clearance measurement process. Below, the CWT clearance measurement process executed in these functional blocks will be described with reference to a flowchart.

[0037] 6 is a flowchart showing a routine of CWT clearance measurement processing executed by the calculation device. The routine shown in FIG. 6 is executed when the elevator is set to the periodic inspection mode.

[0038] The processing from step S120 to step S128 corresponds to a first processing executed in the first processing unit 61. In the first processing, the first processing unit 61 of the calculation device 60 calculates the actual measured pulse number, which is the actual measured value of the number of pulses output from the pulse generator 20 during the period when the car 1 moves from the top floor door zone entry position to the complete stop position.

[0039] Specifically, in step S120, it is determined whether elevator car 1 has entered the door zone of the top floor. Here, the arithmetic device 60 determines whether the door zone detection device 22 has detected a floor arrival signal indicating that car 1 has entered the top floor door zone entry position. As a result, if the determination is not established, it is determined that car 1 is located below the top floor door zone entry position, and the processing of step S120 is repeatedly executed until the determination is established.

[0040] If the determination is affirmative in the processing of step S120, the processing proceeds to step S122. In step S122, at the top floor door zone entry position, the counter value of the pulses output from the pulse generator 20 is latched as a first counter value. When the processing of step S122 is completed, the processing proceeds to step S124.

[0041] In step S124, it is determined whether the elevator has stopped. If the determination is negative, the process of step S124 is repeated until the determination is positive, and if the determination is positive, the process proceeds to step S126.

[0042] In step S126, at the complete stop position, the counter value of the pulses output from the pulse generator 20 is latched as a second counter value. When the process of step S126 is completed, the process proceeds to step S128.

[0043] In step S128, the number of pulses actually measured during the period of movement from the top floor door zone entry position to the complete stop position is calculated according to the following equation (1): When the processing of step S128 is completed, the processing proceeds to step S130. [Actual pulse count] = [Second counter value] - [First counter value] (1)

[0044] The processing of step S130 corresponds to the second processing executed in the second processing unit 62. In the second processing of step S130, the second processing unit 62 of the calculation device 60 converts the actually measured number of pulses into the actually measured distance (mm) traveled by the car 1. When the processing of step S130 is completed, the processing proceeds to step S132.

[0045] The processing from step S132 to step S134 corresponds to a third processing executed by the third processing unit 63. In the third processing, the third processing unit 63 of the calculation device 60 calculates a calculated distance (mm) which is the distance from the top floor level position to the complete stop position of the car 1. Specifically, in step S132, a reference distance from the top floor door zone entry position to the top floor level position is calculated according to the following equation (2). Here, the top floor door zone entry position and the top floor level position are determined using learned values ​​stored as position information in the storage device 56. After the processing of step S132 is performed, the processing proceeds to step S134. [Reference distance (mm)] = [Top floor level position] - [Top floor door zone entry position] (2)

[0046] In step S134, the calculated distance is calculated by substituting the measured distance calculated in step S130 and the reference distance calculated in step S132 into the following equation (3): After the processing of step S134 is performed, the processing proceeds to step S136. [Calculated distance (mm)] = [Measured distance] - [Reference distance] (3)

[0047] The processing of step S136 corresponds to a fourth process executed by the fourth processing unit 64. In the fourth process of step S136, the fourth processing unit 64 of the calculation device 60 determines whether or not the measurement value of the distance L formed between the counterweight 2 and the buffer 9 when the car 1 is stopped at the full stop position has been received from the maintenance terminal 40. The measurement value of the distance L is also called the "pit measurement value" because it is a value measured by a maintenance person in the pit 3a. Figure 7 is a diagram showing an example of a CWT clearance measurement screen displayed on the maintenance terminal. The maintenance person measures the pit measurement value when the elevator is at the full stop position. When the pit measurement value is entered in the pit measurement value field on the CWT clearance measurement screen and the "Calculate" button on the screen is pressed, the determination of step S136 is true, and the processing proceeds to step S138.

[0048] The processing of step S138 corresponds to a fifth processing executed in fifth processing unit 65. In the fifth processing of step S138, the CWT clearance is calculated by substituting the calculated distance calculated in step S134 and the pit measurement value received in step S136 into the following equation (4). After the processing of step S138 is performed, the processing proceeds to step S140. [CWT clearance (mm)] = [Pit measurement value] - [Calculation distance] (4)

[0049] The processing of step S140 corresponds to sixth processing executed in sixth processing unit 66. In the sixth processing of step S140, sixth processing unit 66 of the calculation device 60 outputs the CWT clearance calculated in the fifth processing of step S138 to the maintenance terminal 40. As a result, the CWT clearance calculation result is displayed on the CWT clearance measurement screen of the maintenance terminal 40, as shown in the example of Fig. 7. The maintenance person checks the displayed CWT clearance value and checks whether it is within the reference range.

[0050] According to the above-described method for measuring CWT clearance, the following effects can be obtained.

[0051] In order for a maintenance person to run the elevator car 1 from the pit 3a, manual operation is required. However, manual operation from the pit 3a makes it difficult to accurately stop the car 1 at the top floor level position. According to the clearance measurement device of the embodiment, it is possible to measure the CWT clearance without having to accurately stop the elevator car 1 at the top floor level position. This allows a single maintenance person to measure the CWT clearance by working inside the pit 3a, making it possible to make CWT clearance measurement more efficient and easier.

[0052] Furthermore, during manual operation of the elevator, the speed up to the first stop position is limited to the first set speed, thereby improving safety during manual operation. Furthermore, above the first stop position, the traveling speed of the car 1 is limited to a second set speed that is even slower than the first set speed, thereby improving measurement accuracy and improving safety by limiting the speed at which the counterweight 2 descends into the pit 3a.

[0053] 4. Variations The clearance measurement device according to the embodiment may employ the following modified aspects.

[0054] 4-1. Hardware resources of the arithmetic unit 60 8 is a diagram showing an example of hardware resources of a computing device. The computing device 60 includes, as hardware resources, a processing circuit 74 including a processor 70 and a memory 72. The processing circuit 74 may include multiple processors 70. The processing circuit 74 may include multiple memories 72. The memory 72 may be configured as part or all of the storage device 56.

[0055] In this embodiment, the functions of the arithmetic device 60 can be realized by software written as a program, firmware, or a combination of software and firmware. The program is stored in the memory 72. The arithmetic device 60 realizes each function by executing the program stored in the memory 72 using the processor 70 (computer).

[0056] The processor 70 is also called a CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. The memory 72 may be a semiconductor memory, a magnetic disk, a flexible disk, an optical disk, a compact disk, a minidisk, or a DVD. Usable semiconductor memory includes RAM, ROM, flash memory, EPROM, EEPROM, etc.

[0057] Fig. 9 is a diagram showing another example of hardware resources of a computing device. In the example shown in Fig. 9, a computing device 60 includes, for example, a processor 70, a memory 72, and a processing circuit 78 including dedicated hardware 76. Fig. 9 shows an example in which some of the functions of the computing device 60 are realized by the dedicated hardware 76. All of the functions of the computing device 60 may also be realized by the dedicated hardware 76. The dedicated hardware 76 may be a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof.

[0058] The hardware resources of the elevator control device 54 are similar to those in the examples shown in FIG. 8 or FIG. 9. The elevator control device 54 includes, as its hardware resources, a processing circuit including a processor and memory. The elevator control device 54 realizes the function of executing the routine shown in FIG. 3 by having the processor execute a program stored in the memory. The elevator control device 54 may include, as its hardware resources, a processing circuit including a processor, memory, and dedicated hardware. Some or all of the functions of the elevator control device 54 may be realized by dedicated hardware.

[0059] In addition, in the control panel 10, all or part of the functions of the arithmetic device 60 may be installed in the elevator control device 54.

[0060] 4-2. Elevator control device 54 The complete stop control executed by the elevator control device 54 is not limited to the control executed when an ON signal is received from the first limit switch 30. In other words, the complete stop control may be configured as a control executed when a maintenance worker releases the travel button and stops the manual travel instruction at a position above the top floor door zone entry position. Also, a sensor that detects the arrival of the car 1 may be installed at a position above the top floor door zone entry position, and the complete stop control may be executed when the sensor detects the arrival of the car. [Explanation of symbols]

[0061] 1 car, 2 counterweight, 3 elevator shaft, 3a pit, 4 main rope, 5 hoist, 6 drive sheave, 8 landing, 8a top floor landing, 8b bottom floor landing, 9 buffer, 10 control panel, 12 governor, 14 governor sheave, 16 governor rope, 20 pulse generator, 22 door zone detection device, 24 plate, 26 sensor, 30 first limit switch, 32 second limit switch, 40 maintenance terminal, 52 maintenance switch, 54 elevator control device, 56 storage device, 60 arithmetic device, 61 first processing unit, 62 second processing unit, 63 third processing unit, 64 fourth processing unit, 65 fifth processing unit, 66 sixth processing unit, 70 processor, 72 Memory, 74 processing circuit, 76 dedicated hardware, 78 processing circuit

Claims

1. A clearance measurement device for measuring the clearance between a buffer and a counterweight arranged in a pit of an elevator shaft, a pulse generator that generates pulses corresponding to the moving distance of the car; a storage device that stores position information of a top floor door zone entry position, which is an entry position to an up door zone on the top floor, and a top floor level position, which is a floor level position of the top floor; a door zone detection device that detects the car entering the top floor door zone entry position; an elevator control device that performs complete stop control to stop the car, which is being manually operated during the inspection of the elevator, at a position above the top floor door zone entry position; a calculation device that calculates the clearance when the car is stopped at the top floor level position, The computing device a first process for calculating the number of actually measured pulses output from the pulse generator during a period of movement from when the door zone detection device detects the car entering the top floor door zone entry position until when the car is stopped by the complete stop control; a second process of converting the measured pulse number into an actual distance traveled by the car; a third process of calculating a calculated distance from the top floor level position to a complete stop position by the complete stop control based on a reference distance from the top floor door zone entry position to the top floor level position obtained from the position information and the actual measured distance; a fourth process of receiving an input of a measurement value of the clearance measured in the pit while the car is stopped at the complete stop position; a fifth process of calculating the clearance in a state in which the car is stopped at the top floor level position based on the measurement value and the calculated distance received in the fourth process; A clearance measurement device configured to perform the above.

2. a first limit switch that detects when the car reaches a first position above the top floor level position; The elevator control device executes the complete stop control when the first limit switch detects that the car has reached the first position. The clearance measurement device according to claim 1 , which is configured as follows:

3. a second limit switch that detects when the car reaches a second position that is lower than the top floor door zone entry position; The elevator control device includes: During the inspection of the elevator, when the second limit switch detects that the car has reached the second position, a temporary stop control is executed to stop the car.

3. The clearance measurement device according to claim 2, which is configured as follows:

4. The elevator control device includes: During inspection of the elevator, the speed to the second position is limited to a first set speed, and the speed from the second position to the first position is limited to a second set speed that is slower than the first set speed.

4. The clearance measurement device according to claim 3, which is configured as follows:

5. In the fourth process, the arithmetic device The input of the measurement value is received from a maintenance terminal that can communicate with the arithmetic device.

5. The clearance measurement device according to claim 1, wherein the clearance measurement device is configured as follows:

6. The computing device A sixth process is executed to output the calculation result of the fifth process to the maintenance terminal.

6. The clearance measurement device according to claim 5, which is configured as follows:

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