JP2009073621A - Diagnostic device of passenger conveyer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diagnostic device of a passenger conveyer capable of improving the accuracy of the diagnosis of a diagnostic apparatus by a diagnostic operation of each passenger conveyer. <P>SOLUTION: A diagnostic operation control device 13 of a control device 3 of an escalator includes a first means (a step S07) for calculating a changing trend of the diagnostic apparatus based on the accumulated information of diagnostic results of the diagnostic apparatus, a second means (the step S07) for outputting a deviation signal when a diagnostic result deviates from the changing trend, a third means (a step 10) for changing a diagnostic cycle of the diagnostic apparatus according to the deviation signal, for example, by shortening the cycle, a fourth means (a step S13) for returning the diagnostic cycle when any deviation signal is not outputted for a predetermined period of time after the diagnostic cycle of the diagnostic apparatus is shortened, and a fifth means (a step S12) for outputting an alarm corresponding to at least one of cases regarding the diagnostic result after a deviation signal output including the case that the deviation signal is outputted continuously and the case that the deviation signal is outputted at a predetermined frequency. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a passenger conveyor diagnostic apparatus that is provided in a passenger conveyor such as an escalator and is suitable for diagnosis of diagnostic equipment by diagnostic operation.

  Conventionally, multi-variate analysis is performed using operation data such as load applied to parts, environmental temperature, humidity, operation speed, and rotation speed, and component deterioration parameters are extracted. Based on the extracted parameters, operation time, operation frequency, etc. There has been proposed a method in which a deterioration tendency is extracted from operation data and an inspection cycle until the end of the service life is set (Patent Document 1).

Conventionally, as a result of performing a test operation, for example, in an elevator door opening / closing diagnosis, when the value exceeds a preset threshold, it is determined that an abnormality has occurred when the test operation is retried and the threshold is exceeded again. Has been proposed (Patent Document 2).
Japanese Patent Laid-Open No. 2003-238041 JP 2000-272856 A

  The prior art disclosed in Patent Document 1 analyzes deterioration and life of a diagnostic device, which is a device to be diagnosed, using a statistical method, and determines the timing of inspection / adjustment and parts replacement based on the analysis result. Conveyors are likely to be different from statistical diagnosis and life diagnosis depending on the installation environment and installation accuracy. That is, when the prior art disclosed in Patent Document 1 is applied to a passenger conveyor, it is difficult to expect improvement in diagnosis accuracy. If the difference as described above occurs, there is a risk of equipment damage.

  The prior art disclosed in Patent Document 2 is designed to improve the accuracy of determining whether or not an abnormality has occurred by retrying a test operation when it is detected that a predetermined threshold has been exceeded in the test operation. However, there is no indication of when the wear limit will be reached and the equipment needs to be replaced, so it is not possible to prepare parts or give appropriate work instructions.

  The present invention has been made from the above-described prior art, and an object of the present invention is to provide a passenger conveyor diagnostic device that can improve the accuracy of diagnosis of diagnostic equipment by diagnostic operation for each passenger conveyor. .

  In order to achieve this object, the present invention provides a diagnostic apparatus for a passenger conveyor that diagnoses changes due to aging and deterioration of a diagnostic device that is a diagnostic target device provided in a passenger conveyor at a predetermined cycle. Means for calculating a change tendency of the diagnostic device based on the accumulated information of the results; means for determining whether the diagnosis result has deviated from the change tendency; and outputting a deviation signal when deviating; and according to the deviation signal And a means for changing a diagnostic cycle of the diagnostic device.

  The present invention configured as described above changes the diagnostic cycle of the diagnostic device up to that time when the diagnostic result of the diagnostic device by the diagnostic operation for each passenger conveyor shows a value that deviates from a change tendency with respect to wear of the diagnostic device, for example. In addition, since it is determined whether or not the deviated value is temporary, the diagnostic accuracy of the diagnostic device can be improved.

  Further, the present invention is characterized in that, in the above invention, the means for changing the diagnostic cycle of the diagnostic device comprises means for shortening the diagnostic cycle of the diagnostic device.

  Further, the present invention is characterized in that, in the above-mentioned invention, there is provided means for returning the diagnostic cycle when the deviation signal is not output for a predetermined period after the diagnostic cycle of the diagnostic device is shortened.

  Further, in the present invention according to the present invention, at least one of the diagnosis result after the output of the departure signal and when the departure signal is output continuously and the departure signal is output at a predetermined frequency. A means for outputting an alarm in response is provided.

  According to the present invention configured as described above, it is possible to instruct an operator who performs maintenance of the passenger conveyor by an alarm to perform work such as adjustment and replacement of appropriate diagnostic equipment in a timely manner.

  The present invention relates to a means for calculating a change tendency of a diagnostic device based on accumulated information of diagnostic results of the diagnostic device, a means for outputting a departure signal when the diagnosis result deviates from the change tendency, and a diagnostic device according to the departure signal Therefore, it is possible to determine whether or not the deviated value is temporary based on the changed diagnosis cycle. Thereby, the diagnostic accuracy of the diagnostic device by the diagnostic operation for each passenger conveyor can be improved, and the maintenance management of the diagnostic device superior to the conventional one can be realized.

  The best mode for carrying out the passenger conveyor diagnostic apparatus according to the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the passenger conveyor provided with the present embodiment, for example, an escalator, operates the alarm switch 2 </ b> A and the start / stop switch 2 </ b> B of the operation panel 2 with, for example, a dedicated key (not shown) by the technician 1. Starting and stopping are performed by giving a start command signal and a stop command signal.

  When receiving the start command signal, the control device 3 drives the drive motor 4 and the speed reducer 5 to which the power of the drive motor 4 is transmitted also rotates in synchronization. Here, the speed reducer 5 is connected to a step chain 8 that links the steps 7 by a driving chain 6 and also connected to a handrail drive chain 11 that transmits power to a handrail drive device 10 that drives the handrail 9. Thus, the step 7 and the handrail 9 rotate in synchronization with the rotation of the drive motor 4.

  Further, the control device 3 selects the diagnostic device from the escalator control device 12 that controls the operation of the escalator, and the diagnostic device selection pattern that is stored in a table in advance, and issues an operation command for the diagnostic operation suitable for the corresponding diagnostic device. The diagnosis device according to this embodiment that outputs to the escalator control device 12, stores diagnosis results, detects escalator abnormality, and the like, that is, the diagnosis operation control device 13, and is connected to the diagnosis operation control device 13, And a notification device 14 that outputs an alarm signal when an abnormality occurs. The reporting device 14 is remotely connected via a communication line T to a monitoring center 15 that monitors the occurrence of escalators and elevators and the operating status.

  A terminal device 16 is detachably connected to the diagnostic operation control device 13, and information and programs stored in the diagnostic operation control device 13 and the control device 3 can be read and rewritten from the terminal device 16. Yes.

  In particular, the diagnostic device according to the present embodiment described above, that is, the diagnostic operation control device 13, includes a first means for calculating the change tendency of the diagnostic device based on the accumulated information of the diagnostic result of the diagnostic device, and the diagnostic result has the aforementioned change tendency. A second means for outputting a deviation signal when deviating from, and a third means for changing the diagnostic cycle of the diagnostic device in accordance with the deviation signal. For example, the third means includes means for shortening the diagnostic cycle of the diagnostic device. Further, the diagnostic operation control device 13 shortens the diagnostic cycle of the diagnostic device, and then, when there is no deviation signal output for a predetermined period, the fourth means for returning the diagnostic cycle to the original and the diagnostic result after the deviation signal is output And a fifth means for outputting an alarm in response to at least one of when the deviation signal is output continuously and when the deviation signal is output at a predetermined frequency.

  For example, in the case where the devices that grow (change) over time, such as the driving chain 6, the step chain 8, and the handrail drive chain 11, are diagnostic devices A, B, and C as shown in FIG. By the above-mentioned first means, diagnostic devices A, B, and C are periodically diagnosed and measured by a predetermined algorithm to obtain a change, and the secular change showing a tendency of aging by the least square method based on the accumulated data Straight lines (which may be curved lines) VAave, VBave, VCave are obtained, and normal distributions for these aging straight lines VAave, VBave, VCave are taken into consideration, and upper limit values VAmax, VBmax, VCmax and lower limit values VAmin, VBmin, VCmin The calculation which calculates | requires is performed. Here, the upper limit values VAmax, VBmax, and VCmax and the lower limit values VAmin, VBmin, and VCmin indicate threshold values of the change rate with respect to the previous diagnosis value. For example, if a diagnostic value out of the range between the upper limit value VAmax and the lower limit value VAmin is detected, if the rate of change of the diagnostic device A is high and no action is taken, there will be potential elements that may lead to a failure or accident.

  In addition, the tendency of each type of aging straight lines VAave, VBave, VCave, upper limit values VAmax, VBmax, VCmax, and lower limit values VAmin, VBmin, VCmin are based on the entire diagnosis data of the same model escalator, and the monitoring center 15 and others. It can be managed by performing operations such as least squares on a computer. Thus, they can be used to formulate work cycle criteria.

  Next, the operation of this embodiment will be described with reference to the flowchart of FIG. First, when starting the escalator, the technician 1 operates the alarm switch 2A of the operation panel 2 with a dedicated key to alert the person around the escalator that the escalator starts to move ( In step S01), the start / stop switch 2B of the operation panel 2 is operated with the dedicated key to output a start command signal to the escalator control device 12 (step S02).

  When the diagnostic operation control device 13 which is a diagnostic device according to the present embodiment detects that the escalator control device 12 has input the start command signal, the diagnostic operation control device 13 stores a diagnostic device (not shown) which is stored in advance in the diagnostic operation control device 13 as a table. A diagnostic device is selected according to the selection pattern (step S03), a diagnostic operation command signal corresponding to the diagnostic device is output to the escalator control device 12 (step S04), and the escalator control device 12 performs diagnosis according to the diagnosis content of the diagnostic device. Operation is carried out (step S05).

  When the diagnostic operation is performed, the diagnostic operation control device 13 acquires the diagnostic data, stores it in a storage device (not shown) (step S06), calculates the tendency of the state change of the diagnostic device by the first means, A deviation from a predetermined change tendency is determined by two means (step S07). Further, in step S07, the diagnostic value VA of the diagnostic device A and the diagnostic value VC of the diagnostic device C shown in FIG. When it is determined that the change tendency is small, it is determined whether the diagnostic cycle of the diagnostic devices A and C is performed in a normal period (basic pattern: diagnostic device selection pattern A) or in a period shorter than the normal period. In step S08, in the normal period, the diagnosis operation is terminated and the normal operation is performed.

  In step S07, if the diagnosis result exceeds the upper limit value VBmax, such as the diagnosis value VBx of the diagnosis device B shown in FIG. 3, the diagnosis cycle of the diagnosis device B is performed in a normal period (basic pattern). It is determined whether or not the period is shorter than the normal period (step S09). In the normal period, the diagnosis period of the diagnostic apparatus B is set to a period shorter than normal (diagnostic apparatus selection pattern) by the third means. After setting (step S10) and reflecting it in the next diagnosis operation, the diagnosis operation is terminated and the normal operation is performed.

  Further, when the diagnostic operation of the diagnostic device B is performed in a period shorter than the normal period in step S09, the diagnostic value VBx1, during the period for performing the diagnostic operation in this short period (diagnostic device selection pattern B) When it is determined that the diagnostic result exceeding the upper limit value VBmax is continuous and the change tendency becomes large as in VBx2, or when it is detected three times which is not continuous but a predetermined number of times, the diagnosis is made to the notification device 14 by the fifth means. While outputting the warning signal that the change of the apparatus B is large and transmitting the warning signal to the monitoring center 15 via the communication line T (step S12), the diagnostic operation is terminated and the normal operation is performed.

  In step S11, if the diagnosis result exceeding the upper limit value VBmax in this period (diagnostic device selection pattern B) does not continue or does not reach the predetermined number of times, the diagnosis operation is terminated and the normal operation is completed. To do.

  In addition, because the technician 1 has performed the adjustment work of the diagnostic device B, the diagnosis result in step S07 is within the range of the upper limit value VBmax−the lower limit value VBmin, like the diagnostic value VBy of the diagnostic device B, and the process returns to step S08. If the diagnosis device B has a diagnosis cycle shorter than normal (diagnostic device selection pattern B), the diagnosis cycle of the diagnosis device B is set to a normal period (basic pattern: diagnosis device selection pattern A) by the fourth means. (Step S13), the diagnosis operation is terminated and the normal operation is performed.

  According to the present embodiment, when a diagnostic operation of the diagnostic device of the escalator is performed and a value that deviates from the change tendency is obtained, the diagnosis cycle is changed, for example, shortened, and whether or not the deviated value is transient is determined. As a result, the diagnostic accuracy of the diagnostic device can be improved. As a result, excellent maintenance management of diagnostic equipment can be realized. In addition, when a value that deviates from the change tendency due to the diagnostic operation is continuous or exceeds a predetermined number of times, an alarm is notified to the monitoring center 15, so that the worker who performs maintenance of the escalator from the monitoring center 15 It is possible to instruct work such as adjustment and replacement of appropriate diagnostic equipment in a timely manner.

It is a block diagram which shows one Embodiment of the diagnostic apparatus of the passenger conveyor which concerns on this invention. It is a flowchart which shows the operation | movement in this embodiment. It is a figure which shows the measurement data and aging tendency of the diagnostic driving | operation obtained by this embodiment.

Explanation of symbols

2 Operation Panel 3 Control Device 4 Drive Motor 12 Escalator Control Device 13 Diagnostic Operation Control Device 14 Notification Device 15 Monitoring Center 16 Mobile Terminal

Claims (4)

In the passenger conveyor diagnostic device for diagnosing changes due to aging and deterioration of diagnostic equipment, which is a diagnostic target equipment provided in the passenger conveyor, at a predetermined cycle,
Means for calculating a change tendency of a diagnostic device based on accumulated information of diagnosis results of the diagnostic device; means for determining whether the diagnostic result has deviated from the change tendency; and outputting a deviation signal when deviating; And a means for changing a diagnostic cycle of the diagnostic device in accordance with a departure signal. In the invention of claim 1,
The diagnostic device for a passenger conveyor, wherein the means for changing the diagnostic cycle of the diagnostic device comprises means for shortening the diagnostic cycle of the diagnostic device. In the invention of claim 2,
An apparatus for diagnosing a passenger conveyor, comprising means for restoring the diagnostic period when the deviation signal is not output for a predetermined period after the diagnostic period of the diagnostic device is shortened. In the invention according to any one of claims 1 to 3,
The diagnostic result after the output of the departure signal includes means for outputting an alarm according to at least one of the time when the departure signal is continuously output and the time when the departure signal is output at a predetermined frequency. A diagnostic apparatus for passenger conveyors.

Images