JP2018087073A - Inspection supporting system for elevator rope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection supporting system for an elevator rope capable of improving work efficiency in a rope inspection.SOLUTION: An elevator rope inspection supporting system relating to the invention is provided with a strand breakage detection part 14 which detects strand breakage of a rope 4 that hangs a cage 5 of an elevator 1, a selection part 16 which selects a point of the rope 4 at a position of a latch 10 of a sheave as a candidate for a breakage point when the strand breakage is detected by the strand breakage detection part 14 and an estimation part 20 which determines a point of the rope 4 selected in common as the candidate for the breakage point when the strand breakage is detected a plurality of times.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an elevator rope inspection support system.

  Conventionally, a technique for detecting that an abnormality has occurred in an elevator rope without newly providing a detection device in a hoistway or the like is known. For example, the abnormality of the rope means that the strand breaks. As a technique for detecting the occurrence of an abnormality in an elevator rope, for example, there is one described in Patent Document 1 below.

JP 2007-230731 A

  When it is detected that an abnormality has occurred in the rope, a rope inspection is performed by a maintenance worker. At the time of rope inspection, for example, a maintenance worker on the car visually checks the rope for an abnormal portion. For this reason, the time and labor required for rope inspection are large.

  The present invention has been made to solve the above problems. The object is to provide an elevator rope inspection support system that can improve the efficiency of rope inspection work.

  An elevator rope inspection support system according to the present invention includes a strand break detecting unit that detects strand breaks of a rope that suspends an elevator car, and a position of a sheave shedding when a strand break is detected by the strand break detecting unit. A selection unit that selects a portion of the rope as a fracture location candidate, and an estimation unit that determines a location of the rope that is selected as the fracture location candidate in common when the strand break detection is performed a plurality of times as an estimated fracture location; , With.

  In this invention, an estimation part determines the location of the rope selected as a fracture location candidate in common, when a strand break is detected in multiple times as an estimated fracture location. For this reason, according to this invention, the working efficiency of a rope check can be improved.

It is a block diagram which shows an example of the structure of an elevator. It is a functional block diagram of the rope inspection support system in Embodiment 1. FIG. 6 is a first diagram illustrating an example of a fracture location candidate in the first embodiment. FIG. 10 is a second diagram illustrating an example of a fracture location candidate in the first embodiment. FIG. 10 is a third diagram illustrating an example of a fracture location candidate in the first embodiment. It is a figure for demonstrating the rope inspection in Embodiment 1. FIG. 3 is a flowchart illustrating an operation example of the rope inspection support system according to the first embodiment. It is a hardware block diagram of the control panel of an elevator.

  The elevator rope inspection support system will be described in detail with reference to the accompanying drawings. In each figure, the same or corresponding parts are denoted by the same reference numerals. The overlapping description will be simplified or omitted as appropriate.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram illustrating an example of a structure of an elevator. FIG. 1 shows a case where the roping method is 1: 1 roping as an example.

  As shown in FIG. 1, the elevator 1 includes a hoistway 2, a hoisting machine 3, a rope 4, a car 5, a counterweight 6, and a control panel 7. The hoistway 2 is formed, for example, so as to penetrate each floor of a building (not shown). The hoisting machine 3 is provided, for example, in a machine room (not shown). The car 5 and the counterweight 6 are suspended in the hoistway 2 by the rope 4. The car 5 and the counterweight 6 move up and down when the hoisting machine 3 is driven. The hoisting machine 3 is controlled by the control panel 7.

  The elevator 1 includes a plurality of sheaves. The sheave includes, for example, a driving sheave 8 and a deflector 9 of the hoisting machine 3 shown in FIG. The rope 4 is wound around a plurality of sheaves of the elevator 1. For example, as shown in FIG. 1, the rope 4 is wound around a driving sheave 8 and a deflector 9. As shown in FIG. 1, the sheave has a stopper 10. The stopper 10 is a part for preventing the rope 4 from coming off the sheave. For example, two stoppers 10 are provided for each sheave.

  FIG. 2 is a functional block diagram of the rope inspection support system according to the first embodiment.

  As shown in FIG. 2, the rope inspection support system includes a control panel 7 and a maintenance terminal 11. The control panel 7 includes an operation control unit 12, a position detection unit 13, a strand break detection unit 14, a storage unit 15, and a selection unit 16. The maintenance terminal 11 includes an operation unit 17, a display unit 18, a display control unit 19, and an estimation unit 20.

  The operation control unit 12 controls the operation of the elevator 1 by controlling the driving of the hoisting machine 3. That is, the operation control unit 12 controls the movement of the car 5.

  The position detection unit 13 detects the position of the car 5 in the hoistway 2. The position of the car 5 is detected based on a signal from an encoder of the hoisting machine 3, for example. The position of the car 5 may be detected based on a signal from a sensor (not shown) provided in the hoistway 2 or the car 5, for example. The position of the car 5 detected by the position detection unit 13 is expressed as, for example, a height based on the floor of the building or the lowest floor.

  The strand break detection unit 14 detects that a strand break has occurred in the rope 4. The strand break detection unit 14 detects that a strand break has occurred, for example, based on an impact when a strand that has been broken and jumped to the side of the rope 4 comes into contact with the sheave prevention of the sheave. The impact when the strand comes into contact with the stopper is detected based on, for example, the torque of the hoisting machine 3 and the load of the car 5 measured by the scale device. The scale device is provided, for example, at the end of the rope 4 or the floor of the car 5.

  The detection by the strand break detection unit 14 is performed, for example, during normal operation of the elevator 1. The detection by the strand break detection unit 14 may be performed, for example, during an inspection operation of the elevator 1.

  The storage unit 15 stores, for example, a history of strand break detection by the strand break detection unit 14. The strand break detection history includes, for example, information indicating the position of the car 5 when the strand break is detected. In other words, the strand break detection history includes, for example, the position of the car 5 at the time when the strand contacts one of the sheaves. Hereinafter, the position of the car 5 at the time of strand break detection is also referred to as a “sync position”.

  The storage unit 15 stores, for example, a strand break detection history every time a strand break is detected. That is, the sync position is stored every time a strand break is detected.

  The selection unit 16 selects a plurality of locations on the rope 4 as potential break locations based on the strand break detection history. The break point candidate is represented as a combination of the portions of the rope 4 at the sheave prevention position when the strand break is detected. That is, the breakage location candidates vary depending on the sync position. The fracture location candidate is calculated based on, for example, the total length of the rope 4 and the synchro position. When there are a plurality of strand break detection histories, the selection unit 16 selects, for example, break point candidates corresponding to the respective sync positions included in the individual detection histories.

  The storage unit 15 stores, for example, the fracture location candidate selected by the selection unit 16. The fracture location candidate is stored in association with the detection history including the corresponding sync position, for example.

  The maintenance terminal 11 can communicate with the control panel 7. Communication between the maintenance terminal 11 and the control panel 7 may be wired communication or wireless communication. For example, the maintenance worker connects the maintenance terminal 11 to the control panel 7 when performing maintenance work on the elevator 1.

  The maintenance terminal 11 is, for example, a notebook computer, a tablet terminal, a smartphone, or the like. The operation unit 17 is, for example, a push button, a keyboard, a touch panel, and various pointing devices. The display unit 18 is, for example, a liquid crystal display or a touch panel. The maintenance terminal 11 may have a function of broadcasting audio information.

  For example, the display unit 18 can display not only character information but also visual information using graphics and colors. The display control unit 19 controls the operation of the display unit 18.

  The estimation unit 20 determines an estimated breakage point from the breakage point candidates when a plurality of strand breakage detection histories exist. The estimation unit 20 determines the location of the rope 4 that is selected as the fracture location candidate in common when the strand break is detected a plurality of times as the estimated fracture location.

  The estimation unit 20 may determine, for example, a portion of the rope 4 that is included in two or more sets among a plurality of breakage point candidates corresponding to different synchronization positions as an estimated breakage point. The estimation unit 20 may determine, for example, a portion of the rope 4 that is included in common to all of a plurality of breakage point candidates corresponding to different synchronization positions as the estimated breakage point.

  For example, the display control unit 19 causes the display unit 18 to display visual information indicating the breakage point candidates. For example, the display control unit 19 highlights and displays the portion determined as the estimated breakage portion among the breakage portion candidates. For example, the display control unit 19 does not need to display only the estimated breakage points and not display the breakage point candidates that are not the estimated breakage points.

  For example, the display control unit 19 may cause the display unit 18 to display information indicating the position of the car 5 on which a maintenance worker who has been on the car 5 can visually confirm the breakage point candidate. The information is represented by, for example, a height based on the floor or the lowest floor of the building.

  FIG. 3 is a first diagram illustrating an example of a fracture location candidate in the first embodiment. FIG. 4 is a second diagram illustrating an example of a fracture location candidate in the first embodiment. FIG. 5 is a third diagram illustrating an example of a fracture location candidate in the first embodiment.

  3 to 5 show a case where the roping method is 2: 1 roping as an example. The ends of the rope 4 shown in FIGS. 3 to 5 are supported by a beam (not shown), for example. 3 to 5 show a driving sheave 8, a car suspension car 21, a weight suspension car 22, and a return wheel 23 as sheaves.

  FIG. 3 shows the breakage candidate at the time of the first detection by the strand breakage detection unit 14. As shown in FIG. 3, the fracture location candidates at the first detection are indicated by crosses.

  FIG. 4 shows the breakage candidate at the time of the second detection by the strand breakage detection unit 14. As shown in FIG. 4, the breakage point candidate at the time of the second detection is indicated by a cross mark different from the cross mark indicating the breakage point candidate at the time of the first detection.

  FIG. 5 shows the breakage candidate at the time of the third detection by the strand breakage detection unit 14. As shown in FIG. 5, the break point candidates at the time of the third detection are indicated by cross marks different from the cross marks indicating the break point candidates at the first and second detection times.

  4 and 5, the portions of the rope 4 that are included in common with a plurality of breakage point candidates corresponding to different synchronization positions are highlighted with circles. That is, the circles in FIG. 4 and FIG. 5 indicate the estimated fracture locations.

  The display control unit 19 displays visual information as shown in FIGS. 3 to 5 on the display unit 18, for example. For example, the display control unit 19 may display only one of the plurality of breakage point candidates in accordance with an operation on the operation unit 17.

  FIG. 6 is a diagram for explaining the rope inspection in the first embodiment. The circles in FIG. 6 indicate the same estimated fracture locations as in FIG.

  As shown in FIG. 6, the rope inspection is performed, for example, by a maintenance worker 24 riding on the car 5. For example, the maintenance worker 24 manually operates the car 5 in order to visually confirm the estimated breakage point. The car 5 is manually operated by, for example, operating a car operation switch (not shown).

  For example, when the car 5 is manually operated, the operation control unit 12 stops the car 5 at the inspection position corresponding to the estimated breakage point without the maintenance worker 24 performing an operation of stopping the car 5. The inspection position is a position at which the estimated breakage point can be inspected from the top of the car 5. The inspection position is, for example, a position where the upper surface of the car 5 is 1000 mm lower than the estimated fracture location. For example, the maintenance worker 24 can resume the manual operation by operating the on-car operation switch while the car 5 is stopped at the inspection position. When there are a plurality of estimated breakage points, the operation control unit 12 stops the car 5 at all the inspection positions corresponding to the respective estimated breakage points, for example.

  For example, when the car 5 is manually operated, the operation control unit 12 may stop the car 5 at an inspection position corresponding to a breakage point candidate that is not an estimated breakage point. Whether or not to stop the car 5 at the inspection position corresponding to the breakage point candidate that is not the estimated breakage point is set based on, for example, an operation on the operation unit 17.

  FIG. 7 is a flowchart illustrating an operation example of the rope inspection support system according to the first embodiment.

  The estimation unit 20 determines whether there are a plurality of detection histories having different sync positions as the strand break detection histories (step S101). When it is determined in step S101 that there are a plurality of detection histories having different sync positions, the estimation unit 20 compares the fracture point candidates at the time of detection (step S102) to determine whether there is a common part. Determination is made (step S103).

  When it determines with there being a common location by step S103, the estimation part 20 determines a common location as an estimated fracture location (step S104). The display control unit 19 emphasizes the estimated breakage point and displays the breakage point candidates (step S105). After confirming the estimated breakage point displayed on the display unit 18, the maintenance worker 24 performs manual operation on the car 5 (step S106). The operation control unit 12 automatically stops the car 5 at a position where the estimated breakage point can be inspected (step S107). The subsequent operation differs depending on whether or not the rope inspection is finished (step S108). When the rope inspection is continued, the operations after step S106 are repeated.

  If it is determined in step S101 that there is no plurality of detection histories having different sync positions, or if it is determined in step S103 that there is no common location, the operation of step S109 is performed. In step S109, the display control unit 19 displays the fracture location candidates. The maintenance worker 24 performs manual operation on the car 5 after confirming the break point candidate displayed on the display unit 18 (step S110). For example, the operation control unit 12 automatically stops the car 5 at a position where the breakage candidate can be inspected (step S111). The subsequent operation differs depending on whether or not the rope inspection is finished (step S112). When the rope inspection is continued, the operations after step S110 are repeated.

  In the first embodiment, the strand break detection unit 14 detects the strand break of the rope 4 that suspends the car 5 of the elevator 1. When the strand break detecting unit 14 detects the strand break, the selecting unit 16 selects the portion of the rope 4 at the position of the sheave shedding stopper 10 as a break portion candidate. The estimation unit 20 determines the location of the rope 4 that is selected as the candidate for the fracture location in common when the strand breaks corresponding to the different synchronization positions are detected a plurality of times as the estimated fracture location. For this reason, according to Embodiment 1, it is possible to narrow down the places where the possibility of strand breakage is high. As a result, the work efficiency of the rope inspection can be improved and the strand breakage can be detected early.

  In the first embodiment, the display control unit 19 displays, for example, visual information indicating at least one of the fracture location candidate selected by the selection unit 16 and the estimated fracture location determined by the estimation unit 20 on the display unit 18. Let For this reason, according to the first embodiment, it is possible to make the maintenance worker easily recognize a portion where the possibility of strand breakage occurring is high. As a result, the work efficiency of the rope inspection can be improved.

  In Embodiment 1, the rope inspection support system includes, for example, a maintenance terminal 11 that can communicate with the control panel 7 of the elevator 1. The maintenance terminal 11 includes, for example, a display unit 18, a display control unit 19, and an estimation unit 20. For this reason, according to the first embodiment, the work efficiency of the rope inspection can be improved without complicating the configuration of the control panel 7.

  In Embodiment 1, for example, when the car 5 is manually operated, the operation control unit 12 moves the car 5 at a position where the estimated breakage point determined by the estimation unit 20 can be inspected from the top of the car 5. Stop. For this reason, according to the first embodiment, the maintenance worker does not take time to adjust the position of the car 5 during the rope inspection. As a result, the work efficiency of the rope inspection can be improved.

  In the first embodiment, the rope inspection support system is applied to, for example, an elevator in which the rope 4 is 2: 1 roping. In this case, since the total length of the rope 4 is longer than that in the case where the roping method is 1: 1 roping, it is significant to narrow down the places where the possibility of strand breakage is high. As a result, the work efficiency of the rope inspection can be greatly improved.

  In the first embodiment, the selection unit 16 may be provided in the maintenance terminal 11. In this case, the operation of the selection unit 16 may be performed after the maintenance terminal 11 can communicate with the control panel 7. Even in this case, the work efficiency of the rope inspection can be improved.

  In the first embodiment, the estimation unit 20 may be provided in the control panel 7. In this case, the operation of the estimation unit 20 may be performed before the maintenance terminal 11 can communicate with the control panel 7. Even in this case, the work efficiency of the rope inspection can be improved.

  FIG. 8 is a hardware configuration diagram of an elevator control panel.

  The functions of the operation control unit 12, the position detection unit 13, the strand break detection unit 14, the storage unit 15, and the selection unit 16 of the control panel 7 are realized by a processing circuit. The processing circuit may be dedicated hardware 50. The processing circuit may include a processor 51 and a memory 52. A part of the processing circuit is formed as dedicated hardware 50, and may further include a processor 51 and a memory 52. FIG. 8 shows an example in which the processing circuit is partly formed as dedicated hardware 50 and includes a processor 51 and a memory 52.

  When at least a part of the processing circuit is at least one dedicated hardware 50, the processing circuit may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or the like. The combination is applicable.

  When the processing circuit includes at least one processor 51 and at least one memory 52, each function of the operation control unit 12, the position detection unit 13, the strand break detection unit 14, the storage unit 15, and the selection unit 16 includes software, firmware, Alternatively, it is realized by a combination of software and firmware. Software and firmware are described as programs and stored in the memory 52. The processor 51 reads out and executes the program stored in the memory 52, thereby realizing the function of each unit. The processor 51 is also referred to as a CPU (Central Processing Unit), a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, and a DSP. The memory 52 corresponds to, for example, a nonvolatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, and an EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, and a DVD.

  Thus, the processing circuit can realize each function of the control panel 7 by hardware, software, firmware, or a combination thereof. Note that the functions of the display control unit 19 and the estimation unit 20 of the maintenance terminal 11 are also realized by a processing circuit similar to the processing circuit shown in FIG.

DESCRIPTION OF SYMBOLS 1 Elevator 2 Hoistway 3 Hoisting machine 4 Rope 5 Car 6 Counterweight 7 Control panel 8 Drive sheave 9 Baffle 10 Stopper 11 Maintenance terminal 12 Operation control part 13 Position detection part 14 Strand breakage detection part 15 Memory | storage part 16 selection unit 17 operation unit 18 display unit 19 display control unit 20 estimation unit 21 car suspension vehicle 22 weight suspension vehicle 23 return vehicle 24 maintenance worker 50 dedicated hardware 51 processor 52 memory

Claims (5)

A strand break detecting unit for detecting a strand break of a rope for hanging an elevator car;
A selection unit that selects a portion of the rope at a position of a sheave shedding prevention when a strand break is detected by the strand break detection unit;
An estimation unit that determines the location of the rope selected as a fracture location candidate in common when detection of strand breaks is made multiple times, and an estimated fracture location;
Elevator rope inspection support system with A display for displaying information;
A display control unit that causes the display unit to display visual information indicating at least one of the breakage point candidate selected by the selection unit and the estimated breakage point determined by the estimation unit;
The elevator rope inspection support system according to claim 1, comprising:   The elevator rope inspection support system according to claim 2, further comprising a maintenance terminal that includes the estimation unit, the display unit, and the display control unit and is capable of communicating with an elevator control panel.   The operation control unit according to claim 1, further comprising an operation control unit that stops the car at a position where the estimated breakage point determined by the estimation unit can be inspected from above the car when the car is operated manually. The elevator rope inspection support system according to any one of the above items.   The elevator rope inspection support system according to any one of claims 1 to 4, wherein the rope roping method is 2: 1 roping.

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