CN113955615A - Passenger conveying equipment and diagnosis device thereof - Google Patents
Passenger conveying equipment and diagnosis device thereof Download PDFInfo
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- CN113955615A CN113955615A CN202110691608.3A CN202110691608A CN113955615A CN 113955615 A CN113955615 A CN 113955615A CN 202110691608 A CN202110691608 A CN 202110691608A CN 113955615 A CN113955615 A CN 113955615A
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- 238000003745 diagnosis Methods 0.000 title abstract description 29
- 238000006073 displacement reaction Methods 0.000 claims abstract description 61
- 230000000737 periodic effect Effects 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 36
- 238000000034 method Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B21/00—Kinds or types of escalators or moving walkways
- B66B21/02—Escalators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B23/00—Component parts of escalators or moving walkways
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B23/00—Component parts of escalators or moving walkways
- B66B23/02—Driving gear
- B66B23/024—Chains therefor
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Abstract
The diagnosis device of the passenger conveying equipment comprises: a drive section end gear that rotates in synchronization with the drive motor; an annular step chain for fixing a plurality of steps; and a driven portion end gear rotating in synchronization with the driving portion end gear, the position of the driven portion end gear relative to the driving portion end gear being changed in accordance with the extension of the step chain, and the step chain further comprising: a displacement detector for detecting a displacement of the driven portion end gear from a reference position; a movement distance detector for detecting a movement distance of the plurality of steps; a step passage detector arranged along the periodic rotation orbit of the plurality of steps and detecting passage of at least any step of the plurality of steps; a data acquisition unit that starts measurement of the displacement of the driven part end gear detected by the displacement detector with respect to the movement distance of the step detected by the movement distance detector in synchronization with the passage of any step detected by the step passage detector; and a chain elongation diagnosing unit for detecting occurrence of partial elongation of the step chain based on the movement distance and the displacement acquired by the data acquiring unit.
Description
Technical Field
The invention relates to a passenger conveying equipment and a diagnostic device thereof.
Background
As a technique for detecting the extension of the step chain of the passenger conveyor, there is a technique disclosed in the following patent document 1. Patent document 1 describes: "comprises: a chain elongation diagnosing means for determining a no-load state based on an output signal of the torque control device, measuring a distance to the driven portion final gear in the no-load state, and diagnosing elongation of the step chain based on a change amount from immediately after start of operation; and a chain one-side elongation diagnosing unit … … for calculating a difference in elongation of the step chains provided on the left and right sides and diagnosing the one-side elongation state of the step chains, the chain one-side elongation diagnosing unit being capable of mechanically diagnosing a phenomenon of chain elongation and left and right chain length imbalance, and obtaining a diagnostic result excellent in reliability and maintainability.
Documents of the prior art
Patent document
Patent document 1: japanese patent application laid-open No. 2010-149970
Disclosure of Invention
Problems to be solved by the invention
Regarding elongation of the step chain, in addition to overall elongation, partial elongation due to partial wear of the step chain is also a pattern that is generally assumed. However, with the above-described technique, it is difficult to detect partial elongation of the step chain due to partial wear of the step chain.
Accordingly, an object of the present invention is to provide a passenger conveyor diagnostic device and a passenger conveyor capable of detecting a partial elongation of a step chain.
Means for solving the problems
In order to solve the above problem, for example, the structure in the scope of claims is adopted.
The present application includes various means for solving the above-described problems, and shows, as an example, a diagnostic device for a passenger conveyor, including: a drive section end gear that rotates in synchronization with the drive motor; an endless step chain to which a plurality of steps are fixed at predetermined intervals; and a driven portion end gear that rotates in synchronization with the driving portion end gear by spanning the step chain between the driven portion end gear and the driving portion end gear, and changes a position with respect to the driving portion end gear in accordance with an elongation of the step chain, the diagnostic device for a passenger conveyor including: a displacement detector that detects a displacement of the driven portion end gear from a reference position; a movement distance detector that detects a movement distance of the plurality of steps generated by rotation of the step chain; a step passage detector disposed along the periodic rotation path of the plurality of steps, and configured to detect passage of at least any one of the plurality of steps; a data acquisition unit that starts measurement of the displacement of the driven part end gear detected by the displacement detector with respect to the movement distance of the step detected by the movement distance detector in synchronization with the detection of the passage of the arbitrary step by the step passage detector; and a chain elongation diagnosing unit that detects occurrence of partial elongation of the step chain based on the movement distance and the displacement acquired by the data acquiring unit.
Effects of the invention
According to the present invention, it is possible to provide a passenger conveyor diagnostic device and a passenger conveyor capable of detecting a partial elongation of a step chain.
Problems, structures, and effects other than those described above will be apparent from the following description of the embodiments.
Drawings
Fig. 1 is a configuration diagram of a passenger conveyor of the embodiment.
Fig. 2 is an enlarged view of a peripheral portion of the driven portion end gear.
Fig. 3 is an enlarged view of a peripheral portion of the step passage detector.
Fig. 4 is a timing chart of detection signals of the step-passing detector.
Fig. 5 is a flowchart showing a diagnosis method of the passenger conveyor of the embodiment.
Fig. 6 is a diagram showing a relationship between a step movement distance and a gear displacement in an initial state.
Fig. 7 is a diagram showing a relationship between a step movement distance and a gear displacement when the entire step chain is extended.
Fig. 8 is a diagram showing a relationship between a step movement distance and a gear displacement when a partial extension occurs in the step chain.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Here, first, a basic configuration of a passenger conveyor having a diagnosis device will be described, and then, the embodiments will be described in order of a configuration of a diagnosis device provided in the passenger conveyor and a diagnosis method used by the diagnosis device. In the following embodiments, an escalator is described as an example of the passenger conveyor, but a moving walkway, for example, may be used as the passenger conveyor in addition to an escalator.
Basic structure of passenger conveying apparatus
Fig. 1 is a configuration diagram of a passenger conveyor of the embodiment. The passenger conveyor 1 shown in fig. 1 is erected between an upper floor and a lower floor of a building structure, and transports passengers in a height direction. The passenger conveyor 1 of the embodiment includes a frame 100 that is erected between floor floors, and each element described below is disposed in a state of being supported by the frame 100.
That is, the passenger conveyor 1 includes the drive motor 2 disposed at or near the upper floor inside the frame 100. The drive motor 2 is connected to a reduction gear 4 via a belt 3, and the power thereof is transmitted to the reduction gear 4. The drive motor 2 is connected to a torque control device 5 that variably controls a torque command value of the drive motor 2, and the torque control device 5 controls the rotational acceleration, speed, torque, and the like.
The reduction gear 4 includes shafts extending in 2 directions parallel to the drive shaft of the drive motor 2, and is coupled to a pair of drive section end gears 7 (only one of which is shown) provided on the upper floor side via a pair of drive chains 6. Thereby, the pair of drive unit end gears 7 rotate in synchronization with the drive motor 2.
The passenger conveyor 1 is provided with a pair of driven-portion final gears 8 (only one of which is shown in the figure) on the lower floor side in the frame 100. Each driven portion end gear 8 is connected to the driving portion end gear 7 via a step chain 9, since an endless step chain 9 is bridged between the driven portion end gear and each driving portion end gear 7. Thereby, each driven portion end gear 8 rotates in synchronization with each driving portion end gear 7.
A plurality of steps 10 are bridged between the pair of step chains 9, and each step 10 is fixed to the pair of step chains 9. A pair of driving portion end gears 7, a driven portion end gear 8, and a step chain 9 are disposed on both sides of the plurality of steps 10. Thus, the plurality of steps 10 are connected in an endless manner by the step chain 9, and are rotated between the upper floor and the lower floor in synchronization with the rotation of the drive motor 2. In the initial state, the plurality of steps 10 are fixed to the step chain 9 at regular intervals.
Here, each driven portion end gear 8 described above is provided slidably with respect to the direction toward the driving portion end gear 7 and the direction away from the driving portion end gear 7. Fig. 2 is an enlarged view of a peripheral portion of the driven portion end gear 8. As shown in the drawing, a tension shaft 11 is fixed to the driven portion end gear 8. The tension shaft 11 has one end 11a coupled to the driven portion end gear 8 and the other end 11b extending in a direction away from the driving portion end gear 7 (see fig. 1). The tension shaft 11 is inserted into a coil spring 13 fixed to the frame 100 by a fixing member 12.
The coil spring 13 is fixed to the frame 100 and the tension shaft 11 so as to bias the driven portion end gear 8 in a direction away from the driving portion end gear 7 via the tension shaft 11. Thereby, the driven portion end gear 8 is configured to change its position with respect to the driving portion end gear 7 in accordance with the extension of the step chain 9, and to slide in a direction in which the step chain 9 is prevented from being bent.
Returning to fig. 1, the passenger conveyor 1 includes: a balustrade 14 standing on the upper portion of the frame 100; and an endless moving handrail 15 provided along the periphery of the balustrade 14. The moving handrail 15 is configured to rotate in the same direction as the steps 10 in synchronization with the steps 10.
Structure of diagnostic device
Next, the configuration of the diagnostic device 20 provided in the passenger conveyor 1 configured as described above will be described with reference to fig. 1 and 2, and other drawings as necessary. The diagnostic device 20 is a device for diagnosing the extension of the step chain 9 of the passenger conveyor 1, and is composed of a displacement detector 21, a movement distance detector 22, a step passage detector 23, a detection body 24 (described with reference to fig. 3), and a diagnostic unit 25. Their structures are as follows.
< Displacement Detector 21 >
The displacement detector 21 is provided corresponding to each of the pair of driven portion end gears 8, and detects a displacement of each driven portion end gear 8 with respect to the reference position. Here, the reference position refers to, for example, a position in a case where the step chain 9 is new, there is no overall extension or partial extension, and no passenger gets on the passenger conveyor 1. The displacement detector 21 is disposed in the extending direction of the other end 11b side of the tension shaft 11 fixed to the driven end final gear 8, and detects the displacement in the axial direction of the other end 11b of the tension shaft 11. This allows detection of the displacement of the driven section end gear 8 in the direction of the driving section end gear 7 (hereinafter referred to as gear displacement), and detection of the entire extension of the step chain 9.
< moving distance detector 22 >
The movement distance detector 22 is used to detect the movement distance of the steps 10. The movement distance detector 22 may be, for example, an encoder attached to a rotary shaft of the drive motor 2, and detects the movement distance of the steps 10 based on the rotation speed of the drive motor 2.
< step passage detector 23 >
The step passage detector 23 detects that each step 10 has passed a predetermined position of the rotation path. Such a step passage detector 23 may be, for example, a magnetic induction type displacement detector (MDS) for detecting a metal material. The step passage detectors 23 are disposed on both sides of the steps 10 along the rotation orbit of the steps 10.
< detection body 24 >
Fig. 3 is an enlarged view of the step 10 and the peripheral portion of the step passing detector 23. First, before describing the detection body 24, the structure of each step 10 will be described. As shown in the drawing, each step 10 includes a tread 10a and a kick plate 10b extending substantially perpendicularly from an end edge of the tread 10 a. In addition, each step 10 includes a front wheel 10c and a rear wheel 10d at both ends thereof. The front wheels 10c travel along the track of the step chain 9 (refer to fig. 1) within a front wheel guide track 101 fixed to the frame 100. In addition, the rear wheels 10d travel along the track of the step chain 9 (refer to fig. 1) within the rear wheel guide track 102 fixed to the frame 100.
In each step 10 having such a structure, the tip of the bracket 10e protrudes from both sides of the edge of the kick plate 10 b. Only a part of the bracket 10e is illustrated in the drawing, and the bracket 10e is a support body for supporting the step plate 10a, the kick plate 10b, the front wheel 10c, and the rear wheel 10d, and is made of a metal material.
In the step 10 having such a configuration, particularly, the detection body 24 is provided at the front ends of both sides of the support 10e of the starting point step 10'. The detection body 24 has a shape in which the detection signal of the starting point step 10 'generated by the step passage detector 23 is differentiated from the detection signal of the tip of the support 10e in the other steps 10 by deforming the tip of the support 10e in the starting point step 10'. Here, as an example, the detection body 24 is formed by special processing so that the width W in the moving direction of the distal end of the holder 10e becomes a width W' larger than the width W. The width W' may be smaller than the width W without structural problems.
Fig. 4 is a timing chart of detection signals of the step-passing detector. The timing chart will be described below with reference to fig. 1 to 3. The timing chart is a signal output from the step passage detector 23 in a state where the step 10 is rotated. The step passage detector 23 detects that the tip end of the bracket 10e made of a metal material passes through a position facing the step passage detector 23, and the detection signal is turned ON.
Here, if the moving speed of the step 10 is a constant value, the peak width P of the detection signal corresponds to the width of the front end of the bracket 10e in the moving direction. Therefore, the peak width P ' of the detection signal corresponding to the detection body 24, which is the tip of the holder 10e of the starting point step 10 ', is larger than the peak width P of the detection signal corresponding to the tip of the holder 10e of the other starting point step 10 '. Accordingly, the rotation of the starting point step 10 'can be detected with the timing at which the detection signal having the wide peak width P' is detected as a base point.
The detection body 24 may detect at least a passing signal of the start step 10' based on the output signal of the step passing detector 23. Therefore, the detector 24 is not limited to the configuration in which the tip of the bracket 10e of the starting point step 10 'is deformed, and may be a member provided separately from the starting point step 10'. This ensures the degree of freedom of the arrangement position of the step passage detector 23.
< diagnostic part 25 >
The diagnostic unit 25 (see fig. 1) diagnoses the extension of the step chain 9 based on information from the torque control device 5, the displacement detector 21, the movement distance detector 22, and the step passage detector 23. The diagnosis unit 25 is constituted by a computer. A computer is hardware used as a so-called electronic computer. The computer includes a nonvolatile storage Unit such as a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory) or an HDD (hard disk drive). The diagnostic unit 25 may include a network interface, acquire information from each of the torque control device 5, the displacement detector 21, the movement distance detector 22, and the step passage detector 23, and transmit a signal to the remote monitoring device 200.
The diagnosis unit 25 configured by the computer stores a diagnosis program for diagnosing the elongation of the step chain 9 of the passenger conveyor 1 in a nonvolatile storage unit, and executes a process based on the stored diagnosis program to diagnose the elongation of the step chain 9. The diagnosis unit 25 includes an operation state determination unit 25a, a data acquisition unit 25b, a chain elongation diagnosis unit 25c, and a notification unit 25d as functional units for executing the stored diagnosis program. They have the functions described below.
[ operating condition determining part 25a ]
The operating state determining unit 25a determines the operating state of the passenger conveyor 1 based on information from the torque control device 5. Here, the torque control device 5 performs torque control of the drive motor 2 so as to keep the moving speed of the steps 10 constant even when the load on the drive motor 2 varies due to the passengers' boarding and alighting the passenger conveyor 1. Accordingly, the operating state determining unit 25a reads the output information of the torque control device 5, and determines whether the passenger conveyor 1 is operating or not and whether a passenger is riding on the passenger conveyor 1 during operation. The flow of the determination by the operating state determining unit 25a will be described later in relation to a method of diagnosing the passenger conveyor.
[ data acquisition unit 25b ]
The data acquisition unit 25b acquires data necessary for diagnosing the elongation of the step chain 9 from the displacement detector 21, the movement distance detector 22, and the step passage detector 23 at a predetermined timing, and stores the acquired data. The flow of data acquisition by the data acquisition unit 25b will be described later in relation to a method of diagnosing the passenger conveyor.
[ chain elongation diagnostic section 25c ]
The chain extension diagnosing unit 25c diagnoses the chain extension of the step chain 9 based on the data stored in the data acquiring unit 25 b. The chain elongation diagnosing unit 25c performs a diagnosis based on the gear displacement detected by the displacement detector 21 and the movement distance of the step 10 detected by the movement distance detector 22. The diagnosis by the chain extension diagnosing unit 25c is a detection of partial extension of the step chain 9, a detection of a generation site of the partial extension, and a detection of the entire extension of the step chain 9. The flow of the diagnosis performed by the chain elongation diagnosing unit 25c will be described later in relation to a diagnosis method of the passenger conveyor.
[ Notification section 25d ]
The notification unit 25d notifies the remote monitoring apparatus 200, which is an external apparatus, of the result of the diagnosis by the chain extension diagnosis unit 25 c.
The diagnostic unit 25 may include a jam diagnostic unit for diagnosing a jam state of the slide mechanism of the driven unit end gear 8, but the explanation thereof is omitted here.
Method for diagnosing passenger transfer device
Fig. 5 is a flowchart showing a diagnosis method of the passenger conveyor of the embodiment. The flowchart shows a flow of a method for diagnosing the extension of the step chain of the passenger conveyor, which is implemented by the diagnostic program included in the diagnostic unit 25. The diagnostic method according to the embodiment will be described below with reference to fig. 1 to 4 and other drawings as needed along the flowchart of fig. 5. Further, the passenger conveyor 1 includes the pair of step chains 9 as described above, and the diagnosing unit 25 performs the following steps simultaneously for each of the pair of step chains 9, and also performs diagnosis of one-side extension of the step chain 9.
< step S1 >
In step S1, the operating state determining unit 25a determines whether the passenger conveyor 1 is operating, for example, based on information from the torque control device 5. The diagnosis is performed when the passenger conveyor 1 is operating. Therefore, the operating state determining unit 25a repeatedly makes the determination until it is determined that the vehicle is in operation (YES), and if it is determined that the vehicle is in operation (YES), the process proceeds to the next step S2.
< step S2 >
In step S2, the operating condition determining unit 25a determines that no passenger gets on the passenger conveyor 1 based on the information from the torque control device 5. In this diagnosis, when a passenger gets on the passenger conveyor 1, the position of the driven portion final gear 8 is changed, and the influence of external disturbance on the diagnosis result is increased. Therefore, the operation state determination unit 25a repeatedly makes the determination until it determines that no passenger gets on (yes), and proceeds to the next step S3 when it determines that no passenger gets on (yes).
< step S3 >
In step S3, the data acquisition unit 25b starts a diagnosis of the extension of the step chain 9 of the passenger conveyor 1.
< step S4 >
In step S4, the data acquisition unit 25b determines whether or not the step passage detector 23 has detected the passage of the start step 10', based on the information from the step passage detector 23. The detection of the start step 10' is determined based on the peak width of the detection signal from the step passage detector 23. The data acquisition unit 25b repeats the determination until the start step 10 'is detected (yes) by detecting a detection signal having a wide peak width P' (see fig. 4). If it is determined that the detection is detected (yes), the process proceeds to step S5.
< step S5 >
In step S5, the data acquisition unit 25b starts measurement of the step movement distance and the gear displacement. At this time, the data obtaining portion 25b regards the detection of the start step 10 ' based on the start step 10 ' in step S4 as the start of the cyclic rotation (periodic rotation) of the start step 10 ', and starts the measurement of the gear displacement by the displacement detector 21 in synchronization with this. The data acquisition unit 25b starts measurement of the step movement distance by the movement distance detector 22 in synchronization with the start of rotation of the start step 10'.
< step S6 >
In step S6, the data acquisition unit 25b determines whether or not the start step 10' has passed one revolution (one turn) along the periodic rotation trajectory of the step chain 9 based on the information from the step passage detector 23. After the determination at step S4, when the step passage detector 23 next detects the passage of the starting point step 10 ', the data acquisition unit 25b determines that the starting point step 10' has passed 1 week (yes) and proceeds to the next step S7.
< step S7 >
In step S7, the data acquisition unit 25b stores the acquired data of the step movement distance and the gear displacement acquired during the period in which the starting step 10' has passed through 1 cycle. At this time, the data acquisition unit 25b stores the acquired data as the gear displacement corresponding to the step movement distance in synchronization with the start of rotation of the start step 10'.
< step S8 >
In step S8, the chain elongation diagnosing unit 25c determines whether or not the average value [ dav ] of the gear displacements is equal to or greater than a preset first threshold value [ th1] based on the data stored in the data acquiring unit 25 b. Fig. 6 is a diagram showing a relationship between the step movement distance and the gear displacement in the initial state, and is data stored in the data acquisition unit 25 b. The initial state here refers to a state in which, for example, the stepchain 9 is new and there is no overall elongation or partial elongation. As shown in fig. 6, the first threshold value [ th1] is a value larger than the average value [ dav ] of the gear displacement in the initial state, and indicates an allowable upper limit value of the average value [ dav ] of the gear displacement. Here, the gear displacement is a displacement of the driven portion tip gear 8 with respect to the direction of the driving portion tip gear 7, and a displacement in the direction in which the driven portion tip gear 8 is away from the driving portion tip gear 7 is a positive value.
On the other hand, fig. 7 is a diagram showing a relationship between a step movement distance and a gear displacement when the entire step chain 9 is extended. Fig. 7 is an example of data stored in the data acquisition unit 25b in the diagnosis after the elapse of time t accumulated after the start of the operation of the passenger conveyor 1, and shows the relationship between the step movement distance and the gear displacement. As shown in this figure, when determining that the average value [ dav ] of the gear displacements is equal to or greater than (yes) the first threshold value [ th1, the chain elongation diagnosing unit 25c proceeds to step S9. On the other hand, if it is determined that the average value [ dav ] of the gear displacements is not less than the first threshold value [ th1] (NO), the process proceeds to step S10.
< step S9 >
In step S9, the notification unit 25d notifies the remote monitoring device 200 of the overall extension of the stepchain 9. Thus, the monitoring person of the remote monitoring apparatus 200 can detect the entire extension of the step chain 9 and perform maintenance of the step chain 9 for eliminating the entire extension.
< step S10 >
On the other hand, in step S10, the chain elongation diagnosing unit 25c determines whether or not the peak height [ dp ] of the gear displacement is equal to or greater than a preset second threshold value [ th2] based on the data stored in the data acquiring unit 25 b. Fig. 8 is a diagram showing a relationship between a step movement distance and a gear displacement when a partial extension occurs in the step chain 9. Fig. 8 is an example of data stored in the data acquisition unit 25b in the diagnosis after the elapse of time t accumulated after the start of the operation of the passenger conveyor 1, and shows the relationship between the step movement distance and the gear displacement. The second threshold value [ th2] shown in fig. 8 represents an allowable upper limit value of the peak height [ dp ] in the case where the gear displacement has a peak. The second threshold value [ th2] is set experimentally, and may be a value larger than the first threshold value [ th1] as shown in the figure, or may be the same value, or may be a value smaller than the first threshold value [ th1 ].
Here, the step chain 9 is reversed in a portion passing through the driving portion end gear 7 or the driven portion end gear 8, and the reversed portion is instantaneously extended by an impact. At this time, when the step chain 9 is partially extended by friction, and the partially extended portion is reversed, instantaneous extension is generated more than usual, and the difference appears as a peak of gear shift.
When the gear displacement has a peak, the chain elongation diagnosing unit 25c determines whether or not the peak height [ dp ] is equal to or greater than a second threshold value [ th2 ]. The determination of whether or not there is a peak is determined, for example, from the amount of change and the magnitude of change in the gear displacement corresponding to the step movement distance. When a plurality of peaks are detected, the chain elongation diagnosing unit 25c determines all the peaks. When the chain elongation diagnosing unit 25c determines that the peak height [ dp ] of at least one of all the peaks is equal to or greater than the second threshold value [ th2] (yes), the process proceeds to step S11. On the other hand, if the chain elongation diagnosing unit 25c determines that the peak heights [ dp ] of all the peaks are not equal to or greater than the second threshold value [ th2] (no), the process proceeds to step S13.
< step S11 >
In step S11, the chain elongation diagnosing unit 25c determines whether or not the same peak has been detected in the previous diagnosis for all peaks that have been determined to have a peak height [ dp ] equal to or greater than the second threshold [ th2 ]. Here, the same peak refers to a peak having a height equal to or greater than the second threshold value [ th2] when the same step moves by the distance [ x ]. The chain elongation diagnosing unit 25c performs this determination with reference to the last acquired data stored in the data acquiring unit 25 b. Here, the last acquired data is the data stored in step S13 described later.
When determining that the partial elongation has been measured (yes) at the previous time, the chain elongation diagnosing unit 25c determines that the partial elongation has occurred and proceeds to step S12. On the other hand, if it is determined that the measurement has not been performed (no), the process proceeds to step S13.
< step S12 >
In step S12, the notification unit 25d notifies the remote monitoring apparatus 200 of the partial extension of the stepchain 9. At this time, the notification unit 25d notifies the step movement distance [ x ] of all peaks whose heights equal to or greater than the second threshold value [ th2] are continuously detected. Thus, the monitoring person of the remote monitoring apparatus 200 can detect the partial elongation of the step chain 9 and perform maintenance of the step chain 9 for eliminating the partial elongation.
The monitoring person can specify the position of the step chain 9 at which partial elongation occurs based on the notified step movement distance [ x ] at which the peak is generated and the distance from the driving portion end gear 7 or the driven portion end gear 8 to the step passage detector 23. Further, when the chain elongation diagnosing unit 25c determines in step S11 that the partial elongation has been measured (yes) in the previous time, it may calculate the position of occurrence of the partial elongation based on the information. At this time, in step S12, the notification unit 25d notifies the remote monitoring device 200 of the position of occurrence of the partial elongation calculated by the chain elongation diagnosing unit 25 c.
< step S13 >
In step S13, the chain elongation diagnosing unit 25c stores the acquired data in association with the measurement date and time. In this case, the acquired data stored in the past may be deleted, and the latest acquired data may be stored only in the necessary range. After that, the series of processes is ended.
Effect of the embodiment
According to the embodiment described above, by measuring the gear displacement of the driven portion final gear 8 with respect to the movement distance of the step in synchronization with the periodic rotation of the start step 10', the position where the gear displacement changes abruptly in a moment can be accurately associated with the position where the partial elongation of the step chain 9 occurs. Further, since the gear displacement is a value directly indicating the elongation of the step chain 9, the occurrence of the partial elongation of the step chain 9 can be detected with high accuracy without external disturbance, and the occurrence position of the partial elongation can be detected with high accuracy. In addition, this facilitates maintenance of the step chain 9 in the passenger conveyor 1.
Modifications of the examples
In the embodiment described above, the configuration is adopted in which it is determined in step S6 whether or not the starting point rung 10' has passed 1 cycle. However, if the passenger conveyor 1 is not on the condition that the passenger is not riding, it may be determined whether or not the start step 10' is periodically rotated a predetermined number of times of 2 or more in step S6. In this case, in step S11, it is determined whether or not a peak having a height equal to or greater than the second threshold value [ th2] is measured at the same step movement distance [ x ] in each periodic rotation. In this case, step S13 may be performed as necessary.
Further, the configuration is such that the process proceeds to step S13 after step S9, but the process may proceed to step S10. Further, the movement distance detector 22 is an encoder provided in the drive motor 2, but the step passage detector 23 may be used instead. At this time, the movement distance of the starting point step 10' can be calculated from the number of times the step passage detector 23 detects the component (e.g., the bracket 10e) of each step 10 and the arrangement interval of the steps 10. The data acquiring unit 25b detects the periodic rotation of the starting point steps 10 'based on the detection signal of the detection body 24 provided at the starting point steps 10' detected by the step passage detector 23. However, the data acquisition unit 25b may determine that the periodic rotation of the starting point steps 10' is detected when the number of detection signals corresponding to the number of steps 10 provided is received from the step passage detector 23. In this case, the detection body 24 does not need to be provided at the starting point step 10', and the structure becomes simple.
The present invention is not limited to the above-described embodiments and modifications, and includes various modifications. For example, the above embodiments are described in detail to explain the present invention easily and understandably, and are not limited to the embodiments including all the configurations described. Further, a part of the structure of one embodiment may be replaced with the structure of another embodiment, and the structure of another embodiment may be added to the structure of one embodiment. In addition, other configurations can be added, deleted, and replaced for a part of the configurations of the embodiments.
Description of the reference numerals
1 … … passenger conveyor, 2 … … drive motor, 5 … … torque control device, 7 … … drive unit end gear, 8 … … driven unit end gear, 9 … … step chain, 10 … … step, 10' … … start step (optional step), 20 … … diagnosis device, 21 … … displacement detector, 22 … … movement distance detector, 23 … … step passing detector, 25a … … operation state judgment unit, 25b … … data acquisition unit, 25c … … chain elongation diagnosis unit, [ th1] … … first threshold, [ th2] … … second threshold, and [ dav ] … … displacement average value.
Claims (10)
1. A diagnostic device for a passenger conveyor, comprising:
a drive section end gear that rotates in synchronization with the drive motor;
an endless step chain to which a plurality of steps are fixed at predetermined intervals; and
a driven part end gear that rotates in synchronization with the driving part end gear by spanning the step chain between the driven part end gear and the driving part end gear, and changes a position with respect to the driving part end gear in accordance with an elongation of the step chain,
the diagnostic device for a passenger conveyor is characterized by comprising:
a displacement detector that detects a displacement of the driven portion end gear from a reference position;
a movement distance detector that detects a movement distance of the plurality of steps generated by rotation of the step chain;
a step passage detector disposed along the periodic rotation path of the plurality of steps, and configured to detect passage of at least any one of the plurality of steps;
a data acquisition unit that starts measurement of the displacement of the driven part end gear detected by the displacement detector with respect to the movement distance of the step detected by the movement distance detector in synchronization with the detection of the passage of the arbitrary step by the step passage detector; and
and a chain elongation diagnosing unit that detects occurrence of partial elongation of the step chain based on the movement distance and the displacement acquired by the data acquiring unit.
2. The diagnostic device for a passenger conveyor according to claim 1, characterized in that:
the chain elongation diagnosing unit determines that a partial elongation has occurred in the step chain when a peak having a height equal to or greater than a predetermined threshold value is generated in the displacement with respect to the travel distance acquired by the data acquiring unit.
3. The diagnostic device for a passenger conveyor according to claim 2, characterized in that:
the chain extension diagnosing unit determines that partial extension of the step chain has occurred when the peaks are continuously generated at positions having the same moving distance in the periodic rotation of the steps.
4. The diagnostic device for a passenger conveyor according to claim 2, characterized in that:
the chain elongation diagnosing unit identifies a position at which the partial elongation of the step chain occurs, based on a generation position of the peak in the movement distance.
5. The diagnostic device for a passenger conveyor according to claim 1, characterized in that:
the chain elongation diagnosing unit determines that the entire elongation of the step chain has occurred when the average value of the displacement is equal to or greater than a threshold value set for the average value.
6. The diagnostic device for a passenger conveyor according to claim 1, characterized in that:
includes an operating state determining section for determining an operating state of the passenger conveyor based on information from a torque control device that variably controls a torque command value of the drive motor,
the data acquisition unit starts the measurement when the operating state determination unit determines that no passenger is riding on the passenger conveyor.
7. The diagnostic device for a passenger conveyor according to claim 1, characterized in that:
the arbitrary step has a shape in which a detection signal generated by the step passage detector is different from a detection signal of another step at a portion detected by the step passage detector.
8. The diagnostic device for a passenger conveyor according to claim 1, characterized in that:
the data acquisition unit detects the periodic rotation of the arbitrary step based on the number of detection signals of the plurality of steps detected by the step passage detector.
9. The diagnostic device for a passenger conveyor according to claim 1, characterized in that:
the moving distance detector is an encoder provided to the drive motor.
10. A passenger conveyor characterized by:
a diagnostic device having the passenger conveyor according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020123455A JP7478051B2 (en) | 2020-07-20 | 2020-07-20 | Diagnostic device for passenger conveyor and passenger conveyor |
| JP2020-123455 | 2020-07-20 |
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| CN113955615A true CN113955615A (en) | 2022-01-21 |
| CN113955615B CN113955615B (en) | 2024-05-17 |
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| CN202110691608.3A Active CN113955615B (en) | 2020-07-20 | 2021-06-22 | Diagnostic device for passenger conveyor and passenger conveyor |
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| JP (1) | JP7478051B2 (en) |
| CN (1) | CN113955615B (en) |
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| JP2016098091A (en) * | 2014-11-25 | 2016-05-30 | 三菱電機ビルテクノサービス株式会社 | Device and method for measuring elongation of driving chain for passenger conveyor |
| JP2016210601A (en) * | 2015-05-13 | 2016-12-15 | 三菱電機株式会社 | Chain elongation detection device and passenger conveyor |
| CN110271944A (en) * | 2018-03-13 | 2019-09-24 | 东芝电梯株式会社 | Diagnostic device and diagnostic method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003321186A (en) | 2002-04-30 | 2003-11-11 | Mitsubishi Electric Corp | Operation management device of passenger conveyor |
| JP2008189450A (en) | 2007-02-06 | 2008-08-21 | Toshiba Elevator Co Ltd | Passenger conveyer |
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| JPH0725574A (en) * | 1993-07-14 | 1995-01-27 | Mitsubishi Denki Bill Techno Service Kk | Man conveyor |
| JPH11335055A (en) * | 1998-05-26 | 1999-12-07 | Hitachi Building Systems Co Ltd | Diagnosing device for extension degree of chain |
| JP2002241072A (en) * | 2001-02-20 | 2002-08-28 | Mitsubishi Electric Building Techno Service Co Ltd | Device and method of measuring elongation of footstep chain of passenger conveyor |
| JP2009084028A (en) * | 2007-10-02 | 2009-04-23 | Hitachi Building Systems Co Ltd | Diagnostic method of chain of passenger conveyor |
| CN101759089A (en) * | 2008-12-24 | 2010-06-30 | 株式会社日立制作所 | Diagnostic device of passenger transmission equipment |
| JP2016098091A (en) * | 2014-11-25 | 2016-05-30 | 三菱電機ビルテクノサービス株式会社 | Device and method for measuring elongation of driving chain for passenger conveyor |
| JP2016210601A (en) * | 2015-05-13 | 2016-12-15 | 三菱電機株式会社 | Chain elongation detection device and passenger conveyor |
| CN110271944A (en) * | 2018-03-13 | 2019-09-24 | 东芝电梯株式会社 | Diagnostic device and diagnostic method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022020132A (en) | 2022-02-01 |
| JP7478051B2 (en) | 2024-05-02 |
| CN113955615B (en) | 2024-05-17 |
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