JP6217869B1 - Elevator switch signal diagnostic device and elevator maintenance plan creation system - Google Patents

Abstract

Provided is a switch signal diagnostic device for an elevator capable of appropriately diagnosing a deterioration state of a switch. The switch signal diagnosis device for an elevator includes a deterioration state sampling unit that measures a deterioration state sampling cycle shorter than an operation control sampling cycle when the state of a switch provided in the elevator is used for operation control of the elevator, and the deterioration state sampling A deterioration state diagnosis unit for diagnosing the deterioration state of the switch based on the state of the switch measured by a unit, and a deterioration state recording unit for recording information on the deterioration state of the switch diagnosed by the deterioration state diagnosis unit; , With.

Description

  The present invention relates to an elevator switch signal diagnosis apparatus and an elevator maintenance plan creation system.

  Patent document 1 discloses an elevator. The elevator includes a plurality of switches. Each of the plurality of switches is provided in each part of the elevator. The operation of the elevator is controlled based on the state of each of the plurality of switches. At this time, the state of the switch is measured at a preset operation control sampling period.

Japanese Unexamined Patent Publication No. 2005-350160

  In the elevator, the switch state measurement is stabilized by a chattering prevention circuit. For this reason, the detailed behavior of the switch cannot be grasped. As a result, the deterioration state of the switch cannot be properly diagnosed.

  The present invention has been made to solve the above-described problems. An object of the present invention is to provide a switch signal diagnosis device for an elevator and a maintenance plan creation system for the elevator that can appropriately diagnose the deterioration state of the switch.

  The elevator switch signal diagnostic device according to the present invention is a deterioration state sampling unit that measures a deterioration state sampling period shorter than an operation control sampling period when the state of a switch provided in the elevator is used for operation control of the elevator, A deterioration state diagnosis unit for diagnosing the deterioration state of the switch based on the state of the switch measured by the deterioration state sampling unit, and a deterioration for recording information on the deterioration state of the switch diagnosed by the deterioration state diagnosis unit A state recording unit.

  The elevator maintenance plan creation system according to the present invention is a switch signal diagnostic device that measures a deterioration state sampling cycle shorter than an operation control sampling cycle when the state of a switch provided in the elevator is used for operation control of the elevator, A maintenance plan creation device for creating a maintenance plan for the switch based on a temporal change in the state of the switch measured by the switch signal diagnostic device.

  According to these inventions, the state of the switch is diagnosed with a deterioration state sampling period shorter than the operation control sampling period. For this reason, it is possible to appropriately diagnose the deterioration state of the switch.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the elevator with which the elevator maintenance plan creation system in Embodiment 1 of this invention is applied. It is a block diagram of the control apparatus and maintenance apparatus of the elevator maintenance plan creation system in Embodiment 1 of this invention. It is a timing chart for demonstrating the diagnosis of the deterioration state of a switch by the maintenance plan preparation system of the elevator in Embodiment 1 of this invention. It is a figure for demonstrating the preparation method of the maintenance plan by the maintenance plan preparation system of the elevator in Embodiment 1 of this invention. It is a flowchart for demonstrating operation | movement of the maintenance plan preparation system in Embodiment 1 of this invention. It is a hardware block diagram of the maintenance apparatus of the maintenance plan creation system in Embodiment 1 of this invention. It is a block diagram of the switch of the elevator with which the maintenance plan preparation system of the elevator in Embodiment 2 of this invention is applied. It is a block diagram of the switch of the elevator with which the maintenance plan preparation system of the elevator in Embodiment 3 of this invention is applied.

  A mode for carrying out the invention will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the part which is the same or it corresponds in each figure. The overlapping explanation of the part is appropriately simplified or omitted.

Embodiment 1 FIG.
1 is a configuration diagram of an elevator to which a lift maintenance plan creation system according to Embodiment 1 of the present invention is applied.

  In FIG. 1, each of the buildings includes an elevator. For example, the elevator is an elevator. The hoistway 1 penetrates each building. Each of the halls 2 is provided on each floor of the building. The car 3 is provided inside the hoistway 1.

  Each of the plurality of landing doors 4 is provided at the entrance / exit of the landing 2 on each floor as an elevator door. The car door 5 is provided at an entrance of the car 3 as an elevator door.

  The switch group 6 is provided in the elevator. The switch group 6 includes a plurality of switches not shown in FIG. Each of the plurality of switches is provided in each part of the elevator.

  For example, the control device 7 is provided in a machine room (not shown). For example, the control device 7 is provided inside the hoistway 1. For example, the maintenance device 8 is provided adjacent to the control device 7.

  For example, the center device 9 is provided in an elevator management company. For example, the maintenance database 10 is provided in an elevator management company. The maintenance database 10 records information related to elevator maintenance. For example, the maintenance result recording device 11 is provided in an elevator management company. The maintenance performance recording device 11 records information on the maintenance performance of the elevator. For example, the maintenance plan recording device 12 is provided in an elevator management company. The maintenance plan recording device 12 records information on the maintenance plan of the elevator. For example, the maintenance plan creation device 13 is provided in an elevator management company.

  For example, the maintenance computer 14 is carried by elevator maintenance personnel.

  The control device 7 measures the states of a plurality of switches in the switch group 6 at a preset operation control sampling period. The control device 7 controls the operation of the elevator based on the measurement results of the states of the plurality of switches in the operation control sampling cycle.

  The maintenance device 8 functions as a switch signal diagnostic device. Specifically, the maintenance device 8 measures the states of the plurality of switches in the switch group 6 with a deterioration state sampling cycle shorter than the operation control sampling cycle. The maintenance device 8 transmits information on the states of the plurality of switches in the deterioration state sampling cycle.

  The center device 9 receives information on the state of a plurality of switches in the deterioration state sampling cycle from the maintenance device 8.

  The maintenance plan creation device 13 creates a new maintenance plan for the plurality of switches based on the information on the plurality of switches received by the center device 9 and the information regarding the maintenance recorded in the maintenance database 10. The maintenance plan creation device 13 causes the maintenance plan recording device 12 to record new maintenance plan information for a plurality of switches.

  The maintenance staff uses the maintenance computer 14 to confirm a new maintenance plan for the plurality of switches. The maintenance staff performs maintenance work for the plurality of switches based on the new maintenance plan for the plurality of switches. The maintenance staff records the information on the result of the maintenance work in the maintenance record recorder 11 as the maintenance record information of the elevator.

Next, the control device 7 and the maintenance device 8 will be described with reference to FIG.
FIG. 2 is a block diagram of the control device and maintenance device of the elevator maintenance plan creation system according to Embodiment 1 of the present invention.

  For example, the switch group 6 includes a car door switch 6a, an upper end switch 6b, a lower end switch 6c, and a brake switch 6d.

  For example, the car door switch 6 a is provided on the car door 5. For example, the upper end switch 6b is provided in the upper part of the hoistway 1. For example, the lower end switch 6 c is provided in the lower part of the hoistway 1. For example, the brake switch 6d is provided in a brake (not shown).

  One side of the car door switch 6a is connected to a power source. One side of the upper end switch 6b is connected to a power source. One side of the lower end switch 6c is connected to a power source. One side of the brake switch 6d is connected to a power source.

  For example, the chattering prevention circuit 15 is provided adjacent to the control device 7. The input portion 7a of the chattering prevention circuit 15 is connected to the other side of the car door switch 6a, the other side of the upper end point switch 6b, the other side of the lower end point switch 6c, and the other side of the brake switch 6d.

  The control device 7 includes an input unit 7a, an operation calculation unit 7b, a chattering prevention unit 7c, a logic abnormality diagnosis unit 7d, and a logic abnormality recording unit 7e.

  The maintenance device 8 includes a deterioration state sampling unit 8a, a deterioration state diagnosis unit 8b, and a deterioration state recording unit 8c.

  The state of the car door switch 6 a changes according to the state of the car door 5. The state of the upper end switch 6b changes when the car 3 reaches a preset position in the upper part of the hoistway 1. The state of the lower end switch 6 c changes when the car 3 reaches a preset position in the lower part of the hoistway 1. The state of the brake switch 6d changes when the brake is operated.

  The chattering prevention circuit 15 measures the voltage output from the switch group 6 in the operation control sampling period. For example, the chattering prevention circuit 15 measures the voltage output from the switch group 6 at a period of 50 (ms). The chattering prevention circuit 15 measures the state of the switch group 6 based on the voltage. The chattering prevention circuit 15 outputs information on the state of the switch group 6.

  In the control device 7, the input unit 7 a accepts input of information on the state of the switch group 6 output from the chattering prevention circuit 15. The operation calculation unit 7b calculates a control value used for the operation of the elevator based on the information input to the input unit 7a. The chattering prevention unit 7c receives input of information on the state of the switch group 6 in the operation control sampling period. For example, the chattering prevention unit 7c measures the state of the switch group 6 at a cycle of 50 (ms). The logic abnormality diagnosis unit 7d diagnoses a logic abnormality in the switch group 6. Specifically, the logic abnormality diagnosis unit 7d diagnoses an ON failure or an OFF failure of any switch of the switch group 6 based on the operation state of the elevator and the information of the switch group 6 measured by the chattering prevention unit 7c. To do. The logic abnormality recording unit 7e records information on the logic abnormality diagnosed by the logic abnormality diagnosis unit 7d.

  In the maintenance device 8, the deterioration state sampling unit 8a measures the state of the switch group 6 at a deterioration state sampling period. For example, the deterioration state sampling unit 8a measures the state of the switch group 6 at a cycle set between 0.1 (ms) and 1.0 (ms). The deterioration state diagnosis unit 8b diagnoses the deterioration state of the switch group 6 based on the state of the switch group 6 measured by the deterioration state sampling unit 8a. The deterioration state recording unit 8c associates the information of the deterioration state of the switch group 6 diagnosed by the deterioration state diagnosis unit 8b, the information of the diagnosis time of the switch group 6 by the deterioration state diagnosis unit 8b, and the identification information of the switch group 6. Add and record.

Next, the diagnosis of the deterioration state of the switch will be described with reference to FIG.
FIG. 3 is a timing chart for explaining diagnosis of the deterioration state of the switch by the elevator maintenance plan creation system according to Embodiment 1 of the present invention.

  The left column of FIG. 3 is a timing chart when the switch state changes normally. The middle column of FIG. 3 is a timing chart when the state of the switch changes due to the first abnormality. The right column of FIG. 3 is a timing chart when the switch state changes due to the second abnormality.

  FIG. 3A shows the state of the switch. FIG. 3B shows the timing of measurement by the chattering prevention circuit 15. FIG. 3C shows a measurement result by the chattering prevention circuit 15. For example, the chattering prevention circuit 15 is set to recognize the ON state when the ON state is measured continuously for two cycles.

  FIG. 3D shows the timing of measurement by the deterioration state sampling unit 8a. (E) of FIG. 3 shows the measurement result by the deterioration state sampling part 8a.

  (F) of FIG. 3 shows the 1st diagnostic result by the degradation state diagnostic part 8b. (G) of FIG. 3 shows the 2nd diagnostic result by the degradation state diagnostic part 8b. FIG. 3H shows a third diagnosis result by the deterioration state diagnosis unit 8b.

  In FIG. 3F, the first diagnosis result is the number of ON states. The first diagnosis result is indicated by the same value as the value of (e) in FIG. In FIG. 3G, the second diagnosis result is the occurrence time of chattering. The second diagnosis result is indicated by the number of times of measurement in the operation control sampling period required until the switch state is continuously measured as the ON state twice in the operation control sampling period. In FIG. 3H, the third diagnosis result is the average number of chattering. The third diagnosis result is that the number of times of measurement of the on state when the state of the switch is measuring the on state and the off state during the measurement by the operation control sampling period is measured as the switch state is the on state and the off state. It is indicated by the value divided by the number of measurements in the operation control sampling period.

Next, a method for creating a maintenance plan will be described with reference to FIG.
FIG. 4 is a diagram for explaining a maintenance plan creation method by the elevator maintenance plan creation system according to Embodiment 1 of the present invention.

  For example, in the information “October 2015”, the state of the switch ideally changes from the off state to the on state. In the information “August 2016”, the state of the switch changes from the off state to the on state with some chattering.

  The maintenance plan creation device 13 creates a switch maintenance plan based on a temporal change in the state of the switch. For example, the maintenance plan creation device 13 may cause a switch failure in “May 2017” based on the change in the switch state in “October 2015” and the change in the switch state in “August 2016”. Predict that.

  At this time, the maintenance plan creation device 13 determines the type of switch maintenance work based on the change in the switch state in “October 2015” and the change in the switch state in “August 2016”.

  For example, the maintenance plan creation device 13 sets the next maintenance operation to lightly clean the surface of the switch. For example, the maintenance plan creation device 13 sets the next maintenance operation to replace the switch. For example, the maintenance plan creation device 13 sets the next maintenance work to clean the surface of the switch with a solvent.

  At this time, the maintenance plan creation device 13 determines the timing of maintenance work according to the type of maintenance work.

Next, the operation of the maintenance plan creation system will be described with reference to FIG.
FIG. 5 is a flowchart for explaining the operation of the maintenance plan creation system according to Embodiment 1 of the present invention.

  In step S1, the maintenance plan creation device 13 determines whether or not switch state information has been received. When the maintenance plan creation device 13 has not received the switch status information in step S1, the maintenance plan creation device 13 repeats the operation of step S1. When the maintenance plan creation device 13 receives the switch status information in step S1, the maintenance plan creation device 13 performs the operation of step S2.

  In step S2, the maintenance plan creation device 13 calculates an evaluation value corresponding to a temporal change in the switch state based on the switch state information. Thereafter, the maintenance plan creation device 13 performs the operation of step S3. In step S3, the maintenance plan creation device 13 creates a maintenance plan for the switch based on the evaluation value.

  Thereafter, the maintenance plan creation device 13 performs the operation of step S4. In step S4, the maintenance plan creation device 13 causes the maintenance plan recording device 12 to record switch maintenance plan information. Thereafter, the maintenance plan creation device 13 repeats the operation from step S1.

  According to Embodiment 1 demonstrated above, the state of a switch is diagnosed with the deterioration state sampling period shorter than an operation control sampling period. For this reason, it is possible to appropriately diagnose the deterioration state of the switch.

  For example, the maintenance device 8 diagnoses the occurrence time of chattering. For example, the maintenance device 8 diagnoses the average number of chattering. Therefore, the type and timing of the switch maintenance work can be appropriately determined based on a small amount of information.

  The switch state information is recorded in association with the switch state diagnosis time information. For this reason, the deterioration tendency of the switch can be grasped. As a result, the type and timing of the switch maintenance work can be appropriately determined. By appropriately performing the maintenance work, it is possible to prevent a switch failure. The operation stop time of the elevator can be shortened. The necessity of maintenance of the switch and the state of the switch after the maintenance work can be easily explained to the owner of the elevator.

  At this time, the state of the switch to be diagnosed may be predicted in comparison with the state of the switch investigated in advance. For example, the state of the switch to be diagnosed may be predicted in comparison with the state of the switch to which water and dust are attached. For example, the state of the switch to be diagnosed may be predicted in comparison with the state of the switch to which concrete powder has adhered. For example, the state of the switch to be diagnosed may be predicted in comparison with the state of the switch to which oil and concrete powder adhere.

  Moreover, when the switch state is diagnosed as a slight contact failure, the elevator may be operated specially so that the state of the switch to be diagnosed repeats an on state and an off state. In this case, the oxide film on the surface of the switch is removed. For this reason, the state of the switch can be improved without any special maintenance work.

  Also, only information that satisfies a preset condition among information on the deterioration state of the switch may be left. For example, only a record of information on the maximum value and average value of chattering occurrence time may be left within a preset period. For example, only a record of information on the maximum value and average value of the average number of chattering may be left within a preset period. In this case, the type and timing of the switch maintenance work can be determined appropriately.

Next, an example of the maintenance device 8 will be described with reference to FIG.
FIG. 6 is a hardware configuration diagram of the maintenance device of the maintenance plan creation system according to Embodiment 1 of the present invention.

  Each function of the maintenance device 8 is realized by a processing circuit. For example, the processing circuit includes at least one processor 16a and at least one memory 16b. For example, the processing circuit comprises at least one dedicated hardware 17.

  When the processing circuit includes at least one processor 16a and at least one memory 16b, each function of the maintenance device 8 is realized by software, firmware, or a combination of software and firmware. At least one of software and firmware is described as a program. At least one of software and firmware is stored in at least one memory 16b. At least one processor 16a implements each function of the maintenance device 8 by reading and executing a program stored in at least one memory 16b. The at least one processor 16a 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. For example, the memory 16b is a non-volatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, or an EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, or the like.

  If the processing circuit comprises at least one dedicated hardware 17, the processing circuit is implemented, for example, as a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. The For example, each function of the maintenance device 8 is realized by a processing circuit. For example, each function of the maintenance device 8 is collectively realized by a processing circuit.

  A part of the functions of the maintenance device 8 may be realized by the dedicated hardware 17 and the other part may be realized by software or firmware. For example, the function of the degradation state sampling unit 8a is realized by a processing circuit as the dedicated hardware 17, and the function other than the degradation state sampling unit 8a is stored in at least one memory 16b by at least one processor 16a. May be realized by reading out and executing.

  As described above, the processing circuit realizes each function of the maintenance device 8 by the hardware 17, software, firmware, or a combination thereof.

Embodiment 2. FIG.
FIG. 7 is a configuration diagram of an elevator switch to which the elevator maintenance plan creation system according to Embodiment 2 of the present invention is applied. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1, or an equivalent part. The description of this part is omitted.

  As shown in FIG. 7, the switch group 6 includes a car door switch 6a and a plurality of landing door switches 6e. The car door switch 6a and each of the plurality of landing door switches 6e are connected in series.

  The car door switch 6 a is provided on the car door 5. Each of the plurality of landing door switches 6 e is provided in each of the plurality of landing doors 4.

  The state of the car door switch 6 a changes according to the state of the car door 5. The state of each of the plurality of landing door switches 6e changes according to the state of each of the plurality of landing doors 4.

  In the maintenance device 8, the deterioration state sampling unit 8a measures the state of the switch group 6 at the deterioration state sampling period. The deterioration state diagnosis unit 8b diagnoses the deterioration state of the switch group 6 based on the state of the switch group 6 measured by the deterioration state sampling unit 8a. The deterioration state recording unit 8c records the deterioration state information of the switch group 6 diagnosed by the deterioration state diagnosis unit 8b and the position information of the car 3 in association with each other.

  According to the second embodiment described above, the deterioration state recording unit 8c records the state information of the switch group 6 and the position information of the car 3 in association with each other. For this reason, it is possible to distinguish and diagnose the state of each of the plurality of landing door switches 6e.

Embodiment 3 FIG.
FIG. 8 is a configuration diagram of an elevator switch to which the elevator maintenance plan creation system according to Embodiment 3 of the present invention is applied. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 2, or an equivalent part. The description of this part is omitted.

  As shown in FIG. 8, the car door switch 6a is not connected in series with each of the plurality of landing door switches 6e. The car door switch 6a is provided separately from the plurality of landing door switches 6e.

  In the maintenance device 8, the deterioration state sampling unit 8a measures the state of the car door switch 6a. The deterioration state sampling unit 8a measures the states of the plurality of landing door switches 6e. The deterioration state diagnosis unit 8b diagnoses the deterioration state of the car door switch 6a based on the state of the car door switch 6a measured by the deterioration state sampling unit 8a. The deterioration state diagnosis unit 8b diagnoses the deterioration state of the plurality of landing door switches 6e based on the state of the plurality of landing door switches 6e measured by the deterioration state sampling unit 8a. The deterioration state recording unit 8c records information on the car door switch 6a diagnosed by the deterioration state diagnosis unit 8b, information on the state of the plurality of landing door switches 6e, and information on the position of the car 3 in association with each other.

  According to the third embodiment described above, the car door switch 6a is not connected in series with each of the plurality of landing door switches 6e. For this reason, the state of the car door switch 6a and the state of the landing door switch 6e can be distinguished and diagnosed.

  Note that the deterioration state sampling unit 8a, the deterioration state diagnosis unit 8b, and the deterioration state recording unit 8c may be provided in a device other than the maintenance device 8. For example, the deterioration state sampling unit 8a, the deterioration state diagnosis unit 8b, and the deterioration state recording unit 8c may be provided in the control device 7. For example, the degradation plan sampling unit 8a, the degradation state diagnosis unit 8b, and the degradation state recording unit 8c may be provided in the maintenance plan creation device 13. Also in these cases, the deterioration state of the switch can be properly diagnosed.

  Further, the deterioration state sampling unit 8a, the deterioration state diagnosis unit 8b, and the deterioration state recording unit 8c may be applied to a switch of an elevator other than the elevator. For example, the deterioration state sampling unit 8a, the deterioration state diagnosis unit 8b, and the deterioration state recording unit 8c may be applied to an escalator switch. For example, the deterioration state sampling unit 8a, the deterioration state diagnosis unit 8b, and the deterioration state recording unit 8c may be applied to a moving sidewalk switch. Also in these cases, the deterioration state of the switch can be properly diagnosed.

  As described above, the switch signal diagnosis device for an elevator and the maintenance plan creation system for an elevator according to the present invention can be used for a system that can appropriately diagnose a deterioration state of a switch.

  1 hoistway, 2 landing, 3 car, 4 landing door, 5 car door, 6 switch group, 6a car door switch, 6b upper end switch, 6c lower end switch, 6d brake switch, 6e landing door switch, 7 controller, 7a input unit, 7b operation calculation unit, 7c chattering prevention unit, 7d logic abnormality diagnosis unit, 7e logic abnormality recording unit, 8 maintenance device, 8a deterioration state sampling unit, 8b deterioration state diagnosis unit, 8c deterioration state recording unit, 9 center Device, 10 maintenance database, 11 maintenance performance recording device, 12 maintenance plan recording device, 13 maintenance plan creating device, 14 maintenance computer, 15 chattering prevention circuit, 16a processor, 16b memory, 17 hardware

Claims (7)

A deterioration state sampling unit that measures a deterioration state sampling cycle shorter than an operation control sampling cycle when the state of a switch provided in the elevator is used for operation control of the elevator; and
A deterioration state diagnosis unit that diagnoses the deterioration state of the switch based on the state of the switch measured by the deterioration state sampling unit;
A deterioration state recording unit that records information on the deterioration state of the switch diagnosed by the deterioration state diagnosis unit;
Elevator switch signal diagnostic device.   The deterioration state diagnosis unit is the deterioration state of the switch, in the operation control sampling cycle that is taken until the state of the switch is continuously measured as an ON state by a preset number of times in the operation control sampling cycle. The elevator switch signal diagnosis device according to claim 1, wherein the number of times of measurement is diagnosed as chattering occurrence time.   When the deterioration state diagnosis unit measures an ON state and an OFF state during the measurement based on the operation control sampling period, the switch state measured by the deterioration state sampling unit is measured as the deterioration state of the switch. The value obtained by dividing the number of times of measurement of the on state by the number of times of measurement in the operation control sampling period when the switch state measured by the deterioration state sampling unit measures the on state and the off state. The elevator switch signal diagnosis apparatus according to claim 1 or 2, wherein diagnosis is performed as an average number of times.   The deterioration state recording unit records the deterioration state information of the switch in association with information of the diagnosis time of the deterioration state of the switch by the deterioration state diagnosis unit. The switch signal diagnostic device for elevators as described in 1. The deterioration state sampling unit measures a state of a switch group in which a car door switch of the elevator and a plurality of landing door switches are connected in series at the deterioration state sampling cycle,
The deterioration state diagnosis unit diagnoses the deterioration state of the switch group based on the state of the switch group measured by the deterioration state sampling unit,
5. The deterioration state recording unit records the deterioration state information of the switch group diagnosed by the deterioration state diagnosis unit and information on the position of the elevator car in association with each other. The elevator switch signal diagnostic apparatus according to Item 1. The deterioration state sampling unit measures the state of the car door switch of the elevator at the deterioration state sampling cycle, and measures the state of a plurality of landing door switches of the elevator at the deterioration state sampling cycle,
The deterioration state diagnosis unit diagnoses a deterioration state of the car door switch based on the state of the car door switch measured by the deterioration state sampling unit, and the plurality of landing doors measured by the deterioration state sampling unit Diagnosing the deterioration state of the plurality of landing door switches based on the state of the switch,
The deterioration state recording unit records information on the car door switch diagnosed by the deterioration state diagnosis unit, information on the state of the plurality of landing door switches, and information on the position of the elevator car in association with each other. The switch signal diagnostic device for an elevator according to any one of claims 1 to 4. A switch signal diagnostic device that measures a deterioration state sampling cycle shorter than an operation control sampling cycle when the state of a switch provided in the elevator is used for operation control of the elevator; and
A maintenance plan creation device for creating a maintenance plan for the switch based on a temporal change in the state of the switch measured by the switch signal diagnostic device;
Elevator maintenance plan creation system equipped with.

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