JP2017061365A - Elevator diagnostic system and elevator diagnostic method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably recover equipment performance after degradation is confirmed in elevator equipment.SOLUTION: The elevator diagnostic system includes: means 10 for acquiring degradation information of the elevator equipment; and means 30 for determining a degradation state of the elevator equipment based on the degradation information. The elevator diagnostic system instructs a re-maintenance work depending on the degradation state that is determined based on the degradation information acquired after a maintenance work to the elevator equipment.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an elevator diagnosis system and an elevator diagnosis method for diagnosing a deterioration state of an elevator device.

  As conventional techniques for diagnosing elevator failures and abnormalities, techniques described in Patent Document 1 and Patent Document 2 are known.

  In patent document 1, the measurement value table which memorize | stores the measured value for every measurement month with respect to the several measurement item accompanying operation | movement of an elevator, the failure history table which memorize | stores the failure occurrence date for every failure item at the time of failure of an elevator, , A monitoring data table that stores, for each monitoring item, a predicted value given by a measured value of the corresponding item in the past from the failure occurrence date stored in the measured value table when an elevator failure occurs, a measured value table, and a failure history table Predicted values are stored in the monitoring data table for each monitoring item based on the contents of the monitoring item, and if the measured value table data is within a predetermined range with respect to the predicted value of the monitoring data table, the failure of the corresponding monitoring item is detected An elevator failure prediction apparatus including a prediction unit that outputs a prediction signal to notify is disclosed.

  In this patent document 1, as a specific example, the brake release (braking) time of the elevator is measured and stored in the measurement value table, and the predicting means is based on the measurement value of the brake release (braking) time. It is disclosed to perform failure prediction.

  Furthermore, in Patent Document 1, a measurement value table is provided for each of a plurality of elevators, and a predicted value stored in the monitoring data table is set as an average value of the plurality of elevators, and a data table is provided for when a failure occurs. It is also disclosed that when a predicted value is already stored, the predicted value to be stored in the monitoring data table is corrected and updated based on the stored predicted value and a new predicted value obtained when a failure occurs. Has been.

  Moreover, in patent document 2, even if it is not an experienced person, the plunger attracted | sucked by supplying electric power to a coil as an abnormality diagnosing device of the electromagnetic brake which can diagnose the normality and abnormality of an electromagnetic brake, and can catch the sign of abnormality is known. An electromagnetic brake abnormality diagnosis device having a plurality of measuring means for measuring a plunger movement amount and moving time during suction, a storage means for storing a measurement result of the measuring means, and a measurement result stored in the storage means An electromagnetic brake abnormality diagnosing device including a determination means for determining whether or not there is an abnormality is disclosed.

Japanese Patent Laid-Open No. 10-203744 JP2015-42892A

  In the prior arts disclosed in Patent Documents 1 and 2 mentioned above, the deterioration tendency is grasped from the measured value of the brake release (braking) time of the elevator and the plunger moving amount and moving time at the time of brake suction (release). Although the brake maintenance work is instructed to an elevator maintenance engineer, the check work after the check instruction is not back-checked based on the measurement data, so it is not confirmed whether the work has been performed accurately.

  Therefore, although the above-mentioned conventional technology can be expected to contribute to failure prevention, if performance recovery is not recognized from the measurement data even after the inspection instruction, the inspection work has not been performed after the inspection instruction, or the inspection was performed after the inspection instruction. However, it is not possible to investigate the cause when the brake performance does not recover, because it is not known whether the work was not performed properly, or the brake performance was not recovered although the inspection after the inspection instruction was performed reliably. It was difficult to take appropriate action thereafter.

  Therefore, the present invention provides an elevator diagnosis system and an elevator diagnosis method capable of reliably recovering the performance of an apparatus after the deterioration of the elevator apparatus such as a brake is recognized.

  In order to solve the above problems, an elevator diagnosis system according to the present invention includes means for acquiring deterioration information of an elevator equipment and means for determining a deterioration state of the elevator equipment based on the deterioration information. The re-maintenance work is instructed according to the deterioration state determined based on the deterioration information acquired after the maintenance work on the device.

  In order to solve the above problems, an elevator diagnosis method according to the present invention is for determining a deterioration state of an elevator device, and first step of acquiring deterioration information of the elevator device after maintenance work for the elevator device. And a second step of determining a deterioration state based on the acquired deterioration information, and a third step of instructing a re-maintenance operation according to the determined deterioration state.

  According to the present invention, since the re-maintenance work is instructed according to the deterioration state determined based on the deterioration information acquired after the maintenance work, the performance of the elevator apparatus can be reliably recovered. Thereby, maintenance work quality improves.

  Problems, configurations, and effects other than those described above will become apparent from the following description of embodiments.

1 shows an elevator diagnostic system according to an embodiment of the present invention. It is a flowchart which shows a brake deterioration diagnostic method. The relationship between elevator operation, brake deterioration information, and elevator operation information is shown. The time series transition of the brake release (braking) time, and the relationship between the brake inspection work instruction time, the brake inspection work history, and the subsequent inspection re-instruction time are shown.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an elevator diagnostic system according to an embodiment of the present invention. In the present embodiment, a deterioration state of a brake that is one of elevator devices is diagnosed.

  As shown in FIG. 1, an elevator car 1 and a counterweight 2 to be diagnosed are connected to each other by a main rope 3. The main rope 3 is wound around a sheave 4 provided in the hoisting machine and is suspended in a hoistway (not shown). Thereby, the car 1 and the counterweight 2 are suspended in the hoistway. When the sheave 4 is rotationally driven by a motor (not shown) provided in the hoisting machine, the main rope 3 is sent out in accordance with the rotation of the sheave 4, so that the car 1 and the counterweight 2 connected to the rope 3 are lifted. The car 1 is moved up and down, and the car 1 moves to a predetermined floor.

  A brake for holding the car 1 in a stopped state includes a brake drum 5 having the same rotational axis as the sheave 4 and brake linings 6 a and 6 b that are arranged on the left and right sides of the brake drum 5 and can press the brake drum 5. Yes. Furthermore, in order to confirm whether the brake linings 6a and 6b are normally released (braking) and sucked (released), the brake is actually braked after a brake releasing / suction signal is output from a brake control device (not shown). Brake switches 7a and 7b are provided to measure the time until the linings 6a and 6b brake and release the brake drum 5.

  Note that the brake in the present embodiment is for holding the stopped car 1 in a stationary state, and does not stop the traveling elevator. While the car 1 is stopped, the brake is released (braking). However, when the elevator is started, a brake suction (release) state is formed, and the car 1 can be raised and lowered.

  Further, the elevator is balanced so that the load in the car 1 becomes the same weight as the counterweight 2 in a state where a passenger having a weight half of the rated load is on board. However, in general, the elevator is in a stopped state longer than the activated state, and therefore there is usually no load in the car 1. That is, the weight of the counterweight 2 tends to be longer than the weight of the car 1. In addition, with respect to the rope 3 that connects the car 1 and the counterweight 2, the distribution of the load on the rope portion applied to the car 1 side and the counterweight 2 side varies depending on the stop position of the car 1. In such an elevator brake, according to the study of the present inventor, the positional relationship between the left and right brake linings 6a, 6b and the brake drum 5 changes due to the weight balance between the car 1 and the counterweight 2. Changes and differences occur in the left and right brake release (braking) times due to the start of the elevator. Further, according to the study of the present inventor, the brake release (braking) time may change by performing maintenance work.

  Further, according to the study of the present inventor, depending on the elevator, the brake release (braking) time varies depending on the temperature of the brake related to the season and the operation frequency. For this reason, in brake diagnosis, it is preferable to measure and collect the temperature around the brake or the temperature of the brake body at the time of starting the elevator, and to take into account the change due to the season and the effect on the brake due to the operation frequency.

  In the present embodiment, the brake deterioration state is determined based on the brake release (braking) time, but a reference value for the brake release (braking) time, which is a reference for determination, is set. If the brake release (braking) time to be diagnosed is equal to or greater than the reference value, it is determined that the deterioration state requires maintenance work. Here, as described above, the brake release (braking) time varies depending on the elevator operating state such as the load in the car 1. Therefore, in this embodiment, a reference value is set according to the elevator operating state. Thereby, a highly reliable diagnosis result is obtained.

  The elevator diagnosis system according to the present embodiment diagnoses a deterioration state of a brake that brakes the motor of the hoisting machine that drives the main rope 3, and the monitoring device 10 is a brake that changes due to various factors as described above. In order to measure the release (braking) time, output data (SA, SB) of the brake switches 7a, 7b are collected as brake deterioration information and stored or stored. Further, the monitoring device 10 receives an elevator control device (not shown) from the elevator control device every time the elevator is started, the load fluctuations in the car 1 due to passengers getting on and off the start floor and the stop floor, and the car at start and stop. The load in 1 is collected as elevator operation information and stored or accumulated. The brake deterioration information and the elevator operation information stored or stored in the monitoring device 10 are continuously or periodically, or when the monitoring device 10 receives a command signal from the monitoring center device 30, the monitoring center device via the communication line 20. 30. The monitoring center device 30 diagnoses the brake deterioration state based on the received brake deterioration information and elevator operation information, and provides a maintenance instruction signal for the brake according to the diagnosis result in a terminal device or maintenance technology provided in a sales office (not shown). The call is sent to the terminal device carried by the person. In addition, when the monitoring center device 30 receives a maintenance work end signal from a terminal device included in a sales office or a terminal device carried by a maintenance engineer, the monitoring center device 30 performs a similar diagnosis again after a predetermined period of time has elapsed after the reception. The maintenance person or the monitoring center device determines whether or not further maintenance work (including parts replacement) is necessary and the type according to the diagnosis result.

  Here, the monitoring center device 30 diagnoses the brake deterioration state based on the brake release (braking) time as will be described later. Therefore, the monitoring center device 30 stores data in which the reference value of the brake release (braking) time for determining the deterioration state and the elevator operating state are associated with each other. The monitoring center device 30 refers to such data, selects a reference value corresponding to the elevator operation information transmitted from the monitoring device 10, and diagnoses the brake deterioration state using the selected reference value. To do.

  The monitoring device 10 and the monitoring center device 30 include a computer system, and function by the computer system executing data processing according to a predetermined program.

  FIG. 2 is a flowchart showing a brake deterioration diagnosis method including processing by the elevator diagnosis system of FIG. 1 in the present embodiment.

  As shown in FIG. 2, the brake deterioration diagnosis is executed by the above-described elevator diagnosis system based on the elevator operation information and the brake deterioration information acquired from the diagnosis target elevator (step S1). Here, the elevator diagnosis system obtains the brake release time from the output data of the brake switches 7a and 7b that is obtained as brake deterioration information. Next, the elevator diagnosis system compares the obtained brake release time with a reference value to determine whether or not the diagnosis result is good (step S2). If the brake release time is shorter than the reference value, it is determined that the diagnosis result is good (step S2-Y (Yes)), and the elevator diagnosis system ends the process (step S7). When it is determined that the brake release time is equal to or greater than the reference value and the diagnosis result is not good (step S2-N (No)), the elevator diagnosis system transmits a maintenance work instruction to the sales office or the maintenance engineer ( Step S3). In response to the instruction, when the sales office or maintenance engineer performs maintenance work (step S4), information on the completion of the work or the details of the maintenance work performed from the terminal of the sales office or maintenance engineer is transmitted via the communication line 20 or the like. Is transmitted to the monitoring center device 30 and registered in the maintenance work history of the monitoring center device 30. After the maintenance work is performed, the elevator diagnosis system rediagnoses the brake deterioration state by the same processing as in step S1 (step S5). The elevator diagnosis system compares the brake release time obtained by re-diagnosis with a reference value to determine whether or not the re-diagnosis result is good (step S6). When the brake release time decreases to a value smaller than the reference value and the re-diagnosis result becomes good (step S6-Y), the elevator diagnosis system ends the process (step S7). If it is determined that the brake release time is still longer than the reference value and the re-diagnosis result is not good (step S6-N), the process returns to step S3, and the subsequent processes and operations are repeated.

  When it is determined that the re-diagnosis result is not good (step S6-No), that is, when the brake performance does not recover to the desired performance by maintenance work, the following causes are estimated. One reason is that maintenance work is insufficient. As another cause, it is estimated that the brake has reached the end of its life. Therefore, if it is determined that the re-diagnosis result is not good, the brake performance does not recover to the desired performance by receiving an instruction from the elevator diagnosis system and performing maintenance work again by the sales office or maintenance engineer. The cause can be explored. This improves fault suppression and maintenance work quality.

  FIG. 3 shows the relationship between elevator operation, brake deterioration information, and elevator operation information in the present embodiment.

  As shown in FIG. 3, each time the elevator is started, the brake release (braking) time and the brake suction (release) time, as well as the fluctuation information of the load in the car 1 due to passengers getting on and off the starting floor and the stopping floor. The brake release time (braking) time, such as load information in the car 1 at start-up and stop, and operation frequency information of the elevator (stop time from the previous start-up to the current start-up and the number of start-ups per hour) Collect and accumulate information on parameters that are considered to be factors that change Thus, in this embodiment, the elevator operation information from when the elevator is stopped to when it is started and the brake deterioration information at that time are acquired together. As a result, the brake release (braking) time is changed in the load in the car 1 at the start floor and the stop floor, the load in the car 1 at the time of start and stop, and the operating frequency of the elevator (from the previous start this time It is possible to grasp under what conditions the stop time until the start of the system and the number of times of activation per one hour in the latest increase.

  FIG. 4 shows the outline of the time series transition of the brake release (braking) time in this embodiment, and the relationship between the brake inspection work instruction timing, the brake inspection work history, and the subsequent inspection re-instruction timing. The horizontal axis represents the measurement date, the cumulative running time, or the cumulative number of elevators (brakes) that are assumed to affect the brake deterioration, and the vertical axis represents the brake release (braking) time, which is a measure of brake deterioration.

  As shown in FIG. 4, when it is diagnosed that the brake release (braking) time has exceeded a certain level, an inspection work instruction (inspection instruction) is transmitted. In accordance with this inspection instruction, inspection work is performed (inspection execution). When a predetermined period of time has passed since the completion of the inspection work (for example, after 3 months), a re-diagnosis is executed, and as a result, the brake release (braking) time has not decreased, that is, the brake performance recovery is not recognized An instruction for re-inspection work (re-inspection instruction) is transmitted. As a result, it is possible to more accurately search for the cause of the failure of the brake performance recovery (previous inspection, product life, etc.) and to take appropriate measures during the re-inspection work. As a result, the brake performance can be reliably recovered. Also, avoid a situation in which the brake breaks down until a predetermined period of time (for example, the period until the scheduled regular inspection date) has passed since the inspection was performed (in FIG. 4, three months after the rediagnosis). Can do.

  As described above, according to the present embodiment, the quality of maintenance work is improved.

  In addition, this invention is not limited to embodiment mentioned above, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of the embodiment.

  For example, the brake deterioration state may be diagnosed using only the brake deterioration information among the brake deterioration information and the elevator operation information. The reference value in this case may be an average value of brake release (braking) time that changes depending on the load state.

  Moreover, the elevator apparatus subject to deterioration diagnosis is not limited to a brake, but may be a car or a landing door. In this case, a signal related to door deterioration, such as a door switch signal or a door drive torque signal, can be used as door deterioration information.

1: Car 2: Balance weight 3: Main rope 4: Sheave 5: Brake drums 6a, 6b: Lining 7a, 7b: Brake switch 10: Monitoring device 20: Communication line 30: Monitoring center device

Claims (9)

Means for obtaining degradation information of the elevator equipment;
Means for determining a deterioration state of the elevator equipment based on the deterioration information;
In an elevator diagnostic system comprising:
An elevator diagnosis system that instructs re-maintenance work according to the deterioration state determined based on the deterioration information acquired after maintenance work for the elevator equipment. The elevator diagnostic system according to claim 1.
Furthermore, a means for acquiring elevator operation information is provided,
The elevator diagnostic system characterized by determining the deterioration state of the said elevator apparatus based on the said deterioration information and the said elevator operation information. In the elevator diagnostic system according to claim 1 or 2,
The elevator diagnosis system, wherein the deterioration state is determined after a predetermined period has elapsed after receiving a signal indicating completion of the maintenance work. The elevator diagnostic system according to claim 1.
The elevator equipment is a brake, and the deterioration information is a brake release time,
The elevator diagnosis system characterized by instructing the re-maintenance work when the brake release time is a reference value or more. The elevator diagnostic system according to claim 2,
The elevator device is a brake, the deterioration information is a brake release time, the elevator operation information is information on a load in a car,
The elevator diagnosis system characterized by instructing the re-maintenance work when the brake release time is equal to or more than a reference value corresponding to the elevator operation information. In the elevator diagnostic method for judging the deterioration state of the elevator equipment,
A first step of obtaining deterioration information of the elevator equipment after maintenance work for the elevator equipment;
A second step of determining the deterioration state based on the acquired deterioration information;
A third step of instructing a re-maintenance operation according to the determined deterioration state;
An elevator diagnostic method comprising: In the elevator diagnostic method according to claim 6,
In the first step, elevator operation information is further acquired,
In the second step, an elevator diagnosis method, wherein a deterioration state of the elevator equipment is determined based on the deterioration information and the elevator operation information. In the elevator diagnostic method according to claim 6,
The elevator equipment is a brake, and the deterioration information is a brake release time,
The elevator diagnosis method according to claim 3, wherein when the brake release time is determined to be equal to or greater than a reference value in the second step, the re-maintenance work is instructed in the third step. In the elevator diagnostic method according to claim 7,
The elevator device is a brake, the deterioration information is a brake release time, the elevator operation information is information on a load in a car,
In the second step, when it is determined that the brake release time is not less than a reference value corresponding to the elevator operation information, the re-maintenance work is instructed in the third step. Method.

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