JP6462908B1 - Escalator diagnostic device and escalator diagnostic method - Google Patents

Abstract

To efficiently diagnose an escalator.
SOLUTION: Step wheels 220 and 230 that are provided on an escalator step 100 and that move along the guide rail 300 in contact with the guide rail 300, and steps that cause the step wheels 220 and 230 to travel. An escalator diagnostic apparatus 10 for diagnosing a step drive unit 200 including a chain 240 from a strain detection unit 40 that detects strain generated in the guide rail 300 on the main surface of the guide rail 300 during maintenance inspection. If the output signal is abnormal, the signal processing unit 22 that determines that an abnormality has occurred in the step driving unit 200 and the step driving unit 200 when there is an abnormality And an external output unit 23 for outputting that the occurrence of the error occurs, and the signal processing unit 22 compares the output signal at the time of maintenance inspection with a reference value. Determines that if there is a threshold value or more divergence in both abnormal wheel 220 and 230 has occurred.
[Selection] Figure 2

Description

  Embodiments described herein relate generally to an escalator diagnosis apparatus and an escalator diagnosis method.

  Conventionally, escalators have been regularly inspected to ensure high safety. In the maintenance and inspection of the conventional escalator, the board of the escalator is removed and the state of each part and the operation state are visually confirmed.

JP 2011-116495 A JP2015-174729A

  By the way, in the prior art, there is room for further efficiency in maintenance and inspection work.

  An escalator diagnostic device according to an embodiment is provided on a step of an escalator, a step wheel that moves up and down the step wheel by traveling along the guide rail in contact with a guide rail, and a step chain that drives the step wheel An escalator diagnostic apparatus for diagnosing a step drive unit comprising a processing unit that processes an output signal from a strain detection unit that detects strain generated in the guide rail on the main surface of the guide rail during maintenance inspection. A signal processing unit for determining that an abnormality has occurred in the step driving unit when the output signal is abnormal, and an external indication that an abnormality has occurred in the step driving unit when an abnormality has occurred in the step driving unit. The signal processing unit compares the output signal at the time of the maintenance and inspection with a reference value, and the difference between the both exceeds a threshold value set in advance. If there is determined that an abnormality has occurred to the wheel.

FIG. 1 is a diagram illustrating a schematic configuration of an escalator according to the first embodiment. FIG. 2 is a diagram illustrating a schematic configuration around the steps and the escalator diagnostic device according to the first embodiment. FIG. 3 is a diagram illustrating a schematic configuration of the strain sensor according to the first embodiment. FIG. 4 is a flowchart illustrating an example of the procedure of the escalator diagnosis process according to the first embodiment. FIG. 5 is a diagram illustrating a schematic configuration around a step and an escalator diagnostic device according to a first modification of the first embodiment. FIG. 6 is a diagram illustrating a schematic configuration around a step and an escalator diagnostic device according to a second modification of the first embodiment. FIG. 7 is a diagram illustrating a schematic configuration around a reference step and an escalator diagnostic device according to a third modification of the first embodiment. FIG. 8 is a diagram illustrating a schematic configuration of a position detection unit according to the third modification of the first embodiment. FIG. 9 is a flowchart illustrating an example of the procedure of the escalator diagnosis process according to the third modification of the first embodiment. FIG. 10 is a flowchart illustrating an example of the procedure of the escalator diagnosis process according to the second embodiment. FIG. 11 is a diagram illustrating a schematic configuration around the steps and the escalator diagnostic device according to the fourth embodiment. FIG. 12 is a flowchart illustrating an example of a procedure of escalator diagnosis processing according to a modification of the fourth embodiment.

  Hereinafter, the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by the following embodiment. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or that are substantially the same.

[Embodiment 1]
(Escalator configuration example)
FIG. 1 is a diagram illustrating a schematic configuration of an escalator 1 according to the first embodiment. As shown in FIG. 1, the escalator 1 includes a plurality of steps 100, a pair of balustrade panels 101a and 101b, handrail belts 102a and 102b, and entrances 103a and 103b.

  The plurality of steps 100 are connected endlessly. Each step 100 serves as a scaffold when the user R of the escalator 1 is riding on the escalator 1 and is supported with an inclination angle set by a truss (not shown). When a drive motor (not shown) rotates the sprockets 105a and 105b installed in the upper and lower ends of the truss, each step 100 circulates and moves as a stepped platform between the entrances 103a and 103b. That is, each step 100 moves while circling between the entrance 103 and the entrance 103b. Each step 100 is formed from, for example, aluminum die casting.

  The sprocket 105 a is provided with a pulse generator 106. The pulse generator 106 generates pulses at predetermined intervals according to the moving speed of the step 100. By counting the number of pulses, the moving distance of each step 100 can be calculated.

  The balustrade panels 101 a and 101 b are installed on both sides of the plurality of steps 100 in the width direction of the escalator 1. The balustrade panels 101a and 101b are installed to face each other across the plurality of steps 100. The balustrade panels 101a and 101b are made of, for example, transparent glass or acrylic.

  The handrail belts 102a and 102b are used by the user R. The handrail belts 102a and 102b are endless belts and are movably wound around the peripheral portions of the balustrade panels 101a and 101b. The handrail belts 102a and 102b are moved in synchronization with the movement of the respective steps 100 by a drive motor. The handrail belts 102a and 102b are made of, for example, rubber.

  The boarding gates 103a and 103b are provided with boarding boards 104a and 104b, respectively. The boarding boards 104a and 104b serve as scaffolds when the user R gets on and off the escalator 1. Moreover, the boarding / alighting board 104a, 104b is installed so that removal is possible. A drive motor, a folded step 100, and the like are stored under the boarding boards 104a and 104b.

(Configuration example of step drive unit)
Next, the configuration of the step drive unit 200 that drives the step 100 will be described with reference to FIG. FIG. 2 is a diagram illustrating a schematic configuration around the step 100 and the escalator diagnostic device 10 according to the first embodiment.

  As shown in FIG. 2, the step 100 is supported from below by a step support portion 250. Thereby, the step 100 functions as a stepped platform.

  The step 100 is provided with a step drive unit 200 on a guide rail 300. The step drive unit 200 includes a pre-step wheel 220, a post-step wheel 230, and a step chain 240.

  The guide rail 300 is installed on a truss (not shown) so as to follow the inclination angle of the truss, and makes a pair on both sides of the step 100. The guide rail 300 includes a plate-like member and a pair of side walls that stand on both sides in the short direction of the member. A plate-like member included in the guide rail 300 constitutes a main surface of the guide rail 300. That is, the upper surface of the guide rail 300 (the surface with which the pre-step wheel 220 described later contacts) and the lower surface are the main surfaces of the guide rail 300.

  The pre-step wheels 220 are, for example, two pairs of wheels connected by an axle 221. These two pairs of pre-step wheels 220 are installed in contact with the guide rails 300 on both sides of the step 100, respectively. The post-step wheels 230 are, for example, a pair of wheels connected by an axle 231. The pair of post-step wheels 230 are installed inside the pre-step wheels 220 (near the step 100) and in contact with the guide rails 300 on both sides of the step 100, respectively. The two pairs of pre-step wheels 220 and the pair of post-step wheels 230 mainly constitute step wheels.

  The step chain 240 includes, for example, a pair of chains that connect two pairs of pre-step wheels 220 and a pair of chains that connect two pairs of pre-step wheels 220 and a pair of post-step wheels 230. The The pair of step chains 240 are connected to the hubs of the two pairs of pre-step wheels 220 to connect the two pairs of pre-step wheels 220 to each other. The other pair of step chains 240 is connected to the hubs of the two pairs of pre-step wheels 220 and the pair of post-step wheels 230, thereby connecting the pre-step wheels 220 and the post-step wheels 230.

  In the step drive unit 200, the step chain 240 is fed by a drive motor (not shown). As a result, the two pairs of pre-step wheels 220 and the pair of post-step wheels 230 travel along the guide rail 300, thereby raising and lowering the steps 100 along the inclination angle of the truss. The number and arrangement of the guide rail 300, the pre-step wheel 220, the post-step wheel 230, and the step chain 240 can be variously changed and are not limited to the configuration described above.

  A strain detector 40 is installed on the upper surface of the guide rail 300. The strain detection unit 40 includes a plurality of strain sensors 40a that detect strain of the guide rail 300 due to passage of the step wheels. Specifically, the strain sensor 40a is installed, for example, at two locations on the track 220t through which the pre-step wheel 220 passes and the track 230t through which the post-step wheel 230 passes. That is, two pairs of strain sensors 40 a are installed on the guide rails 300 on both sides of the step 100. The detailed configuration of the strain sensor 40a will be described later.

(Configuration example of escalator diagnostic device)
Next, the configuration of the escalator diagnostic apparatus 10 will be described with reference to FIG.

  In the escalator 1, in order to ensure high safety, maintenance inspections are periodically performed. The maintenance inspection is performed by manual or scheduled automatic operation or the like when the user R is not present, for example, before or after the start of the facility where the escalator 1 is installed. The escalator 1 is configured to be able to switch the state between an operation mode during normal operation and an inspection mode during maintenance inspection. At the time of maintenance inspection, the escalator 1 is operated in the inspection mode, and the output signal from the strain detection unit 40 is acquired in the state where the user R is not present.

  As shown in FIG. 2, the escalator diagnostic apparatus 10 is electrically connected to the strain detection unit 40 and includes a control unit 20 and a storage unit 30. Each part with which the escalator diagnostic apparatus 10 is provided is connected so that communication is possible via arbitrary communication paths.

  The storage unit 30 is, for example, a memory device such as a RAM (Random Access Memory) or a ROM (Read Only Memory), a fixed disk device such as a hard disk, a flexible disk, or an optical disk. The storage unit 30 stores installation inspection mode data 31. The in-installation inspection mode data 31 is data of an output signal acquired from the strain detection unit 40 in a state where the escalator 1 is operated in the inspection mode and the user R is not present when the escalator 1 is installed. The installation inspection mode data 31 is a reference value for an output signal at the time of maintenance inspection described later.

  The control unit 20 includes a CPU (Central Processing Unit) interconnected by a normal type bidirectional common bus, a ROM (Read Only Memory) pre-stored with a predetermined control program, and a calculation result of the CPU. A microcomputer having a RAM (Random Access Memory), a backup RAM, and an input / output port device, and a drive circuit. The control unit 20 includes an input unit 21, a signal processing unit 22, and an external output unit 23 in terms of functional concept.

  The input unit 21 acquires an output signal from the strain detection unit 40.

  When the output signal from the strain detection unit 40 is acquired during maintenance inspection, the signal processing unit 22 processes the output signal and determines whether the output signal is abnormal. Specifically, the signal processing unit 22 compares the installation inspection mode data 31 (reference value) stored in the storage unit 30 with the data of the output signal acquired at the time of maintenance inspection, and outputs at the time of maintenance inspection. It is determined whether the signal is abnormal. If the output signal at the time of maintenance inspection is abnormal, it means that some abnormality has occurred in the step drive unit 200 of the escalator 1.

  As an example of detecting an abnormality, for example, one of the pre-step wheel 220 and the post-step wheel 230 or a plurality of wheels has caused a lateral shift that deviates from a predetermined track. In this case, a portion where the pre-step wheel 220 or the post-step wheel 230 contacts the strain detection unit 40 becomes a part. For this reason, even if the pre-step wheel 220 or the post-step wheel 230 passes through the strain detection unit 40, the strain amount of the strain detection unit 40 is smaller than normal and the output signal is also small. As another example of the abnormality detection, for example, one or a plurality of wheels before the step 220 or the wheel 230 after the step is damaged. Also in this case, the output signal from the strain detector 40 is small or not detected at all. When a protrusion-like object is generated on the damaged wheel, the output signal may suddenly increase.

  That is, when a normal wheel passes over the strain detector 40, the output signal of the strain detector 40 changes with a substantially constant intensity. The abnormality of the wheel is detected as a convex peak or a concave peak protruding from a certain intensity. If such a peak and a reference value have a deviation greater than or equal to a preset threshold value, it is determined that the output signal during maintenance inspection is abnormal. The threshold value is obtained from the spec value of the escalator 1, for example. The signal processing unit 22 determines that some abnormality has occurred in the step driving unit 200 of the escalator 1 when the output signal at the time of maintenance inspection is abnormal.

  When it is determined that the output signal from the strain detection unit 40 is abnormal, the external output unit 23 outputs to the outside that an abnormality has occurred in the step driving unit 200. The output to the outside is, for example, an alarm issue or announcement to the person in charge of monitoring, a warning display on a monitoring monitor (not shown), a mail transmission to the person in charge of maintenance.

(Example of strain sensor configuration)
Here, the detailed configuration of the strain sensor 40a included in the strain detector 40 will be described with reference to FIG. FIG. 3 is a diagram illustrating a schematic configuration of the strain sensor 40a according to the first embodiment.

  As shown in FIG. 3, the strain sensor 40a is a metal including a gauge 40G that extends in one direction while meandering in a zigzag manner, a base 40B that supports the gauge 40G, and a lead wire 40L that draws an output signal from the gauge 40G. It is a strain gauge. The length in the direction in which the gauge 40G extends is referred to as a gauge length L, and the length in the direction perpendicular to the direction in which the gauge 40G extends is referred to as a gauge width W. The gauge 40G generates a predetermined voltage corresponding to the amount of strain when it is distorted by applying a load or the like.

  When the escalator 1 is operated, the pre-step wheel 220 and the post-step wheel 230 travel along the guide rail 300. At this time, a predetermined amount of distortion occurs in the guide rail 300. When the pre-step wheel 220 and the post-step wheel 230 pass over the strain sensor 40a, the strain generated in the guide rail 300 is transmitted to the strain sensor 40a, and a predetermined amount of strain is detected as an output signal.

  The strain sensor 40a may be, for example, a semiconductor strain gauge using a piezoelectric element.

  Although the strain sensor 40a is installed on the upper surface of the guide rail 300, it may be installed on the lower surface. Thereby, it can suppress that the distortion | strain sensor 40a is damaged with a step wheel. Thus, the strain sensor 40a (strain detector 40) may be installed on either the main surface of the guide rail 300, that is, the upper surface or the lower surface. However, the strain amount of the guide rail 300 caused by the step wheel or the like is larger on the upper surface of the guide rail 300. Therefore, by installing the strain sensor 40a on the upper surface of the guide rail 300, the output signal becomes large and it becomes possible to detect a smaller strain.

(Example of escalator diagnosis processing)
Next, the diagnosis process of the escalator diagnosis apparatus 10 will be described with reference to FIG. FIG. 4 is a flowchart illustrating an example of the procedure of the escalator diagnosis process according to the first embodiment.

  In step S <b> 11, the input unit 21 included in the control unit 20 of the escalator diagnostic device 10 acquires an output signal from the strain detection unit 40 detected when the escalator 1 is installed, and stores it in the storage unit 30 as inspection mode data 31 during installation. Remember.

  In step S <b> 12, the input unit 21 of the control unit 20 acquires an output signal from the strain detection unit 40 detected at the time of maintenance and inspection of the escalator 1.

  In step S13, the signal processing unit 22 of the control unit 20 compares the output signal when the escalator 1 is installed with the output signal during maintenance and inspection.

  If the difference between the two output signals is less than the threshold value in step S14 (No), the process returns to step S12 and the following flow is repeated. If the difference between the two output signals is greater than or equal to the threshold value in step S14 (Yes), the external output unit 23 of the control unit 20 outputs the abnormality of the escalator 1 to the outside in step 15.

  Thus, the diagnostic process of the escalator diagnostic device 10 is completed. When an abnormality of the escalator 1 is output to the outside, for example, an operator removes the boarding / alighting plates 104a and 104b of the escalator 1, visually confirms the state of each part and the operating state, and performs necessary repair work.

  In a conventional escalator, during maintenance inspection, an operator must remove the board of the escalator and visually check the state of each part and the operating state. Maintenance inspections are performed on a daily basis to ensure the safety of the escalator, and the burden on the operator is large. Moreover, visual confirmation takes time, and the operating time of an escalator will fall.

  According to the escalator diagnostic apparatus 10 of the first embodiment, it is possible to detect an abnormality in the pre-step wheel 220 and the post-step wheel 230 inside the escalator 1 without removing and confirming the boarding / removing plates 104a and 104b. As a result, it is possible to save labor and reduce time for maintenance and inspection work. Further, early abnormality detection becomes possible.

  In the above description, an output signal from the strain detector 40 is acquired when the escalator 1 is installed, and this is used as a reference value for the output signal during maintenance inspection. However, instead of the output signal when the escalator 1 is installed, the output signal of the escalator having the same specification may be generalized based on, for example, a specification value, and this value may be used as a reference value. Or it is good also considering the stable value or average value in the output signal at the time of a maintenance inspection as a reference value. This also applies to the following various modifications.

(Modification 1)
Next, Modification 1 of Embodiment 1 will be described. The escalator diagnostic apparatus of Modification 1 is different from the escalator diagnostic apparatus 10 of Embodiment 1 in the configuration of the strain detection unit. Hereinafter, only differences from the escalator diagnostic apparatus 10 according to the first embodiment will be described with reference to FIG. FIG. 5 is a diagram illustrating a schematic configuration around the step 100 and the escalator diagnostic device 10 according to the first modification of the first embodiment.

  As shown in FIG. 5, the plurality of strain sensors 40 a included in the strain detector 41 of Modification 1 are arranged at, for example, equal intervals in the vicinity of both ends of the guide rail 300 and in a region sandwiched between both ends of the guide rail 300. It is installed to be done. That is, the strain sensors 40a are installed at a plurality of locations on the track 220t through which the pre-step wheel 220 passes. The strain sensors 40a are installed at a plurality of locations on the track 230t through which the wheel 230 passes after the step. As described above, in the escalator diagnostic apparatus 10 according to the first modification, the plurality of strain sensors 40 a are arranged to be scattered over the entire area of the guide rail 300.

  According to the escalator diagnostic apparatus 10 of Modification 1, since the plurality of strain sensors 40a are installed on one track 220t (or track 230t), the accuracy of abnormality detection is further increased.

(Modification 2)
Next, a second modification of the first embodiment will be described. The escalator diagnostic apparatus of Modification 2 is different from the escalator diagnostic apparatus 10 of Embodiment 1 in the configuration of the strain detection unit. Hereinafter, only differences from the escalator diagnostic apparatus 10 according to the first embodiment will be described with reference to FIG. FIG. 6 is a diagram illustrating a schematic configuration around the step 100 and the escalator diagnostic device 10 according to the second modification of the first embodiment.

  As illustrated in FIG. 6, the plurality of strain sensors 42 a included in the strain detection unit 42 according to the second modification have a gauge length longer than that of the strain sensor 40 a according to the first embodiment. For example, the gauge length of the strain sensor 42a is equal to or longer than the distance Ro traveled when the pre-step wheel 220 (or the post-step wheel 230) makes one rotation. However, regardless of the example of FIG. 6, a plurality of strain sensors 40 a according to the first embodiment may be connected so that the entire gauge length is equal to or longer than the distance Ro.

  According to the escalator diagnostic apparatus 10 of the second modification, the gauge length of the strain sensor 42a is set to be equal to or longer than the distance Ro traveled when the front wheel 220 (or rear wheel 230) rotates once, so the front wheel 220 ( Alternatively, the abnormality of the entire contact surface of the post-step wheel 230) with the guide rail 300 can be detected. Thereby, for example, even when a part of the pre-step wheel 220 (or the post-step wheel 230) is missing, an abnormality can be detected. That is, the abnormality detection system is further increased.

(Modification 3)
Next, a third modification of the first embodiment will be described. The escalator diagnostic apparatus of Modification 3 is different from the escalator diagnostic apparatus 10 of Embodiment 1 in that it includes a position detection unit that detects the position of the step 100. Hereinafter, only differences from the escalator diagnostic apparatus 10 according to the first embodiment will be described with reference to FIGS. FIG. 7 is a diagram illustrating a schematic configuration around the reference step 100s and the escalator diagnostic device 10 according to the third modification of the first embodiment.

  The position detection unit of Modification 3 can be applied to any of the escalator diagnostic apparatuses 10 of Embodiment 1 and Modifications 1 and 2 described above. In FIG. 7, the case where the position detection part 50 is applied to the escalator diagnostic apparatus 10 of Embodiment 1 is shown. As shown in FIG. 7, in the escalator 1 of the third modification, a reference step 100 s including a reference step detection unit 51 is provided in the step support unit 250. The escalator diagnostic apparatus 10 of Modification 3 includes a step 100 in which an abnormality has occurred due to the detection signal of the reference step detection unit 51 and the pulse signal from the pulse generator 106 provided in the sprocket 105a (see FIG. 1). Specify the position of. For example, the position information of the step 100 where the abnormality has occurred is stored in the storage unit 30 as the abnormal step position information 50i. The position detection unit including the reference step detection unit 51 and the pulse generator 106, and the strain detection unit 40 are connected to the escalator diagnostic apparatus 10 according to the third modification.

  FIG. 8 is a diagram illustrating a schematic configuration of the position detection unit 50 according to the third modification of the first embodiment. As shown in FIG. 8, the position detection unit 50 includes a reference step detection unit 51 of the reference step 100s, a reference point switch 51a, a switch support unit 51b, and a pulse generator 106.

  The reference step detection unit 51, the reference point switch 51a, and the switch support unit 51b, together with the reference step 100s and the pre-step wheel 220, the post-step wheel 230, the guide rail 300, and the like of the plurality of steps 100, the machine room below the reference step 100s. 107.

  The reference step detection unit 51 of the reference step 100 s is a plate-like member provided at the lower end of the step support unit 250. The reference point switch 51a has a shape (U shape) in which one side of the frame is opened. As the reference step detection unit 51 passes inside the U-shaped structure of the reference point switch 51a, the passage of the reference step 100s is detected. One end of the switch support 51b is installed on the lower surface of the guide rail 300, and the reference point switch 51a is attached to the other end. As a result, the switch support 51 b arranges the reference point switch 51 a at the passing position of the reference step detector 51. The reference point switch 51a and the switch support portion 51b are arranged at positions aligned with the strain sensor 40a, for example, in a direction orthogonal to the traveling direction of the reference step 100s.

  Here, it is assumed that the passage of the reference step 100s is detected by the reference point switch 51a. Thereafter, it is assumed that the strain sensor 40a above the reference point switch 51a detects an abnormality after, for example, 100 counts by the pulse generator 106. According to the position detection unit 50, it is possible to know how far the reference step 100s has advanced 100 counts after passing through the reference step 100s. In other words, the step 100 that is located on the strain sensor 40a when the strain sensor 40a detects the abnormality is, for example, the fifth step 100 from the reference step 100s. Can be identified. The signals from the pulse generator 106 and the reference point switch 51a are acquired by the input unit 21 of the escalator diagnostic apparatus 10, and the position information (abnormal step position information 50i) of the step 100 having the abnormality specified in this way is For example, it is stored in the storage unit 30.

  When an abnormality is detected in a predetermined step 100, a maintenance inspection is performed immediately. The maintenance inspection in this case is a maintenance inspection in which workers are involved. The escalator diagnosis apparatus 10 determines the step 100 in which an abnormality is detected at a predetermined inspection position based on the abnormal step position information 50i at the next maintenance inspection involving humans, that is, at the latest maintenance inspection after the abnormality is detected. Move to. The predetermined inspection position is, for example, a position directly below the boarding / exiting plates 104a and 104b.

  Although the reference step detection unit 51 is provided on the step support unit 250 of the reference step 100s, it may be provided on any of the pre-step wheel 220 and the post-step wheel 230. In this case, the reference step detection unit 51 is a minute protrusion (not shown) that does not cause vibration in the reference step 100s. The reference step 100s is detected as a change in the output signal of the predetermined strain sensor 40a. This eliminates the need for the reference point switch 51a and the switch support 51b. That is, in this configuration, the reference step detection unit 51, the strain sensor 40a, and the pulse generator 106 function as the position detection unit 50.

  Next, the diagnosis process of the escalator diagnosis apparatus 10 according to Modification 3 will be described with reference to FIG. FIG. 9 is a flowchart illustrating an example of the procedure of the escalator diagnosis process according to the third modification of the first embodiment. Here, the processing after step S11 to step S13 will be described.

  If the difference between the two output signals is greater than or equal to the threshold value in step S14 (Yes), the position of the step 100 where the abnormality is detected is identified in step S31 in comparison with the position information detected by the position detection unit 50. . The position information acquired by the input unit 21 is stored in the storage unit 30 as abnormal step position information 50i.

  In step S32, at the next maintenance inspection, the escalator diagnostic apparatus 10 of the modification 3 reads the stored position information. Based on such position information, the escalator diagnostic apparatus 10 according to the third modification moves the step 100 where the abnormality has occurred to a predetermined inspection position.

  According to the escalator diagnostic apparatus 10 of Modification 3, it is easy to identify the location where an abnormality has occurred. Further, since the location where the abnormality has occurred is automatically moved to a predetermined inspection position, maintenance inspection time can be reduced and oversight of the abnormal location can be suppressed.

[Embodiment 2]
Next, Embodiment 2 will be described. The escalator diagnostic apparatus according to the second embodiment is different from the escalator diagnostic apparatus 10 according to the first embodiment in that the elongation of the step chain 240 is diagnosed. Hereinafter, only differences from the escalator diagnostic apparatus 10 according to the first embodiment will be described with reference to FIG. FIG. 10 is a flowchart illustrating an example of the procedure of the escalator diagnosis process according to the second embodiment.

  The escalator diagnostic apparatus 10 according to the second embodiment can be applied to any of the escalator diagnostic apparatuses 10 according to the first embodiment and the first to third modifications. Hereinafter, an application example of the escalator diagnostic apparatus 10 according to the first embodiment will be described.

  In step S <b> 41, the input unit 21 included in the control unit 20 of the escalator diagnostic device 10 acquires an output signal from the strain detection unit 40 detected when the escalator 1 is installed, and stores it in the storage unit 30 as the inspection mode data 31 during installation. Remember. The installation inspection mode data 31 includes the output cycle of the output signal as data. The output period of the output signal is the peak of the output signal when the wheel of a predetermined step 100 passes over the predetermined strain sensor 40a and the output when the wheel of the next step 100 passes over the strain sensor 40a. It is the length between the signal peaks. The output cycle of this output signal is a specified value with respect to the output cycle of the output signal at the time of maintenance inspection described later.

  As described above, it is preferable that the output signal data when the escalator 1 of the same individual is installed is used as the specified value of the output cycle. This is because the traveling speed may be set differently for each escalator 1, and in that case, the output cycle is different.

  In step S <b> 42, the input unit 21 acquires an output signal from the strain detection unit 40 detected during the maintenance inspection of the escalator 1. The acquired data at the time of maintenance inspection includes the output cycle of the output signal as data.

  In step S43, the signal processing unit 22 of the control unit 20 compares the output cycle (specified value) when the escalator 1 is installed with the output cycle during maintenance and inspection.

  If the difference between the two output signal periods is less than the threshold value in step S44 (No), the process returns to step S42 and the following flow is repeated. In step S44, if the difference between the two output signal cycles is equal to or greater than the threshold (Yes), the signal processing unit 22 determines that the output signal cycle during maintenance inspection is abnormal.

  The escalator 1 normally operates at a constant speed. The interval at which the wheels of each step 100 pass over the predetermined strain sensor 40a is also constant. When a deviation greater than the threshold value is observed in the output signal period during maintenance and inspection, the passage interval on the strain sensor 40a of each step 100 is shifted (delayed). This means that the step chain 240 is stretched due to deterioration or the like. Such a threshold value is obtained from the spec value of the escalator 1, for example. When the output signal cycle at the time of maintenance inspection is abnormal, the signal processing unit 22 determines that the step chain 240 has been stretched.

  In step 45, the external output unit 23 of the control unit 20 outputs an abnormality of the escalator 1 to the outside. Thus, the diagnostic process of the escalator diagnostic device 10 is completed.

  According to the escalator diagnostic apparatus 10 of the second embodiment, it is possible to detect the extension of the step chain 240 without removing and confirming the boarding / removing plates 104a and 104b. As a result, it is possible to save labor and reduce time for maintenance and inspection work. Further, early abnormality detection becomes possible.

[Embodiment 3]
Next, the escalator diagnostic apparatus of Embodiment 3 will be described. The escalator diagnostic apparatus according to the third embodiment is different from the escalator diagnostic apparatus 10 according to the first embodiment in that the deformation of the guide rail 300 is diagnosed. Hereinafter, only differences from the escalator diagnostic apparatus 10 according to the first embodiment will be described with reference to FIGS.

  As illustrated in FIG. 5, for example, the strain detection unit 41 according to the first modification of the first embodiment is applied to the escalator diagnostic apparatus 10 of the third embodiment. In addition, as a reference value for the output signal of the strain detector 41 during maintenance inspection, it is preferable to use data of the output signal when the same escalator 1 is installed. This is because, when the guide rail 300 is installed, an initial strain may be slightly generated, and the amount of the initial strain may vary depending on the individual escalator 1. In addition, the deformation of the guide rail 300 is usually very small, and higher accuracy than that of detecting the abnormality of the step driving unit 200 is required.

  The signal processing unit 22 compares the output signal at the time of installing the escalator 1 with the output signal at the time of maintenance and inspection, and when there is a deviation greater than a preset threshold value, the guide rail 300 of the escalator 1 is deformed. Determine that it has occurred. The threshold value is obtained from the spec value of the escalator 1, for example.

  The process in the case of using the escalator diagnostic apparatus 10 of Embodiment 3 for the maintenance inspection after the occurrence of an earthquake will be described with reference to FIG.

  In step S <b> 11, the control unit 20 of the escalator diagnostic device 10 stores an output signal from the strain detection unit 40 when the escalator 1 is installed in the storage unit 30 as installation inspection mode data 31.

  When an earthquake occurs, an earthquake occurrence signal is generated from an earthquake detector (not shown).

  In step S <b> 12, the control unit 20 that has received the earthquake occurrence signal automatically starts maintenance and inspection, and the input unit 21 acquires an output signal from the strain detection unit 40.

  In step S13, the signal processing unit 22 of the control unit 20 compares the output signal when the escalator 1 is installed with the output signal during maintenance and inspection.

  If the difference between the two output signals is less than the threshold value in step S14 (No), the process returns to step S12 and the following flow is repeated. If the difference between the two output signals is greater than or equal to the threshold value in step S14 (Yes), in step 15, the external output unit 23 of the control unit 20 outputs an abnormality of the escalator 1 to the outside.

  Thus, the diagnostic process of the escalator diagnostic device 10 is completed. The escalator 1 in which the deformation of the guide rail 300 is detected is stopped until the restoration work by the worker is completed.

  According to the escalator diagnostic apparatus 10 of the third embodiment, since a plurality of strain sensors 40a are installed on one track 220t (or track 230t), for example, if only the front wheel 220 (or post-step wheel 230) is used. Therefore, it becomes easy to detect the residual strain due to the earthquake of the guide rail 300 or the like. Therefore, if the maintenance inspection by the escalator diagnostic apparatus 10 according to the second embodiment is performed after the occurrence of the earthquake as described above, it helps to determine whether the escalator 1 can be restarted.

[Embodiment 4]
Next, the escalator diagnostic apparatus of Embodiment 4 is demonstrated. The escalator diagnostic apparatus according to the fourth embodiment is different from the escalator diagnostic apparatus 10 according to the first embodiment in that the loading state of the escalator 1 is determined. Hereinafter, only differences from the escalator diagnostic apparatus 10 according to the first embodiment will be described with reference to FIGS. FIG. 11 is a diagram illustrating a schematic configuration around the step 100 and the escalator diagnostic device 10 according to the fourth embodiment.

  As shown in FIG. 11, the escalator diagnostic apparatus 10 of the fourth embodiment is preferably applied to, for example, the strain detection unit 41 of the first modification of the first embodiment. The storage unit 30 of the escalator diagnostic apparatus 10 stores installation load data 32. The installed load data 32 is output signal data obtained from the strain detector 40 when the escalator 1 is operated in the operation mode and a load is applied to the escalator 1 when the escalator 1 is installed. A state where a load is applied can be created, for example, by placing a person imitating the user R. At this time, the data is acquired in several stages, for example, one or more passengers of the escalator 1, multiple persons at equal intervals on a plurality of steps 100, and the number of persons having the maximum load capacity. It is preferable. As the loaded load increases, the strain amount of the guide rail 300 also increases, and the output signal from the strain detector 41 also increases.

  The input unit 21 of the control unit 20 acquires an output signal from the strain detection unit 40 when the escalator 1 is in operation. The signal processing unit 22 compares the sum of the output signals with the sum of the output signals of the loading load data 32 at the time of installation. The sum of output signals is the sum of all strain sensors 40 a included in the strain detector 40. Thereby, the signal processing part 22 determines the loading state of the escalator 1 at that time. The determination of the loading state includes, for example, “low load”, “medium load”, “high load”, and the like. At this time, when the sum of the output signals during operation is equal to or greater than a preset threshold value, the control unit 20 adjusts the operation of the escalator 1 such as temporarily reducing the traveling speed of the escalator 1. Do. The threshold value at this time can be, for example, the total sum of output signals in the vicinity of the maximum load load among the data of the load load data 32 at the time of installation.

  Next, the process of the escalator diagnostic apparatus 10 of Embodiment 4 is demonstrated using FIG. FIG. 12 is a flowchart illustrating an example of a procedure of escalator diagnosis processing according to a modification of the fourth embodiment.

  In step S <b> 51, the input unit 21 included in the control unit 20 of the escalator diagnostic device 10 acquires an output signal from the strain detection unit 40 in the loaded state when the escalator 1 is installed, and loads the installed load in the storage unit 30. Store as data 32.

  In step S <b> 52, the input unit 21 acquires an output signal from the strain detection unit 40 when the escalator 1 is operating.

  In step S <b> 53, the signal processing unit 22 of the control unit 20 compares the sum of output signals when the escalator 1 is installed with the sum of output signals during operation to determine the loading state of the escalator 1.

  If the output signal during operation is less than the threshold value in step S54 (No), the process returns to step S52 and the following flow is repeated. In step S54, if the output signal during operation is greater than or equal to the threshold value (Yes), in step 55, the control unit 20 adjusts the operation of the escalator 1.

  According to the escalator diagnostic device 10 of the fourth embodiment, it is possible to suppress the escalator 1 from being overloaded. Moreover, it can avoid that the escalator 1 stops in order to protect the escalator 1. FIG.

  As mentioned above, although several embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Escalator, 10 ... Escalator diagnostic device, 20 ... Control part, 21 ... Input part, 22 ... Signal processing part, 23 ... External output part, 30 ... Memory | storage part, 31 ... Installation inspection mode data, 32 ... Loading at installation Load data, 40, 41, 42 ... strain detector, 40a, 42a ... strain sensor, 50 ... position detector, 51 ... reference step detector, 100 ... step, 100s ... reference step, 106 ... pulse generator, 200 ... Step drive unit, 220 ... wheel before step, 230 ... wheel after step, 240 ... step chain, 250 ... step support unit, 300 ... guide rail.

Claims (7)

A step wheel provided on a step of the escalator, which contacts the guide rail and travels along the guide rail to raise and lower the step; and
An escalator diagnostic device for diagnosing a step drive unit including a step chain for running the step wheel,
When a maintenance inspection is performed, an output signal from a strain detection unit that detects strain generated in the guide rail on the main surface of the guide rail is processed, and when the output signal is abnormal, an abnormality has occurred in the step driving unit. A signal processing unit for determining;
An external output unit that outputs to the outside that an abnormality has occurred in the step drive unit when an abnormality has occurred in the step drive unit;
The signal processing unit
The output signal at the time of the maintenance inspection is compared with a reference value, and when there is a deviation greater than a preset threshold value for both, it is determined that an abnormality has occurred in the wheel.
Escalator diagnostic device. A storage unit for storing an output signal of the strain detection unit detected at the time of installation of the escalator;
The strain detection unit includes a plurality of strain sensors provided at a plurality of locations including the vicinity of both ends of the guide rail,
The signal processing unit
The output signal at the time of the maintenance inspection is compared with the output signal at the time of the escalator installation, and when there is a deviation greater than a preset threshold value for both, it is determined that the guide rail has been deformed
The escalator diagnostic apparatus according to claim 1. The length of the gauge of the strain detector extending in the extending direction of the guide rail is equal to or longer than the distance traveled when the step wheel makes one rotation,
The escalator diagnostic apparatus according to claim 1. A position detector for detecting the position of the step;
If it is determined that an abnormality has occurred in the step drive unit, the step where the abnormality has occurred in the step drive unit is identified from the output signal of the strain detection unit and the position of the step detected by the position detection unit, A control unit that moves the step in which an abnormality has occurred in the step driving unit to a predetermined inspection position during a next maintenance inspection,
The escalator diagnostic apparatus according to any one of claims 1 to 3. The signal processing unit
The output cycle of the output signal of the strain detector is detected, and when a deviation from a specified value occurs in the output cycle, it is determined that elongation has occurred in the step chain.
The escalator diagnostic apparatus according to any one of claims 1 to 4. The output signal at the time of installing the escalator is acquired in a state where a load is applied to the escalator,
The signal processing unit
Compare the output signal from the strain detector in a state where the escalator is in operation with the output signal when the escalator is installed, and determine the loading state of the escalator.
The escalator diagnostic apparatus according to claim 2. A step wheel provided on a step of the escalator, which contacts the guide rail and travels along the guide rail to raise and lower the step; and
An escalator diagnosis method for diagnosing a step drive unit including a step chain for running the step wheels,
At the time of maintenance inspection performed at a predetermined timing, a strain detection step during inspection in which the strain detection unit emits strain generated in the guide rail as an output signal,
A signal processing step of processing the output signal and determining that an abnormality has occurred in the step drive unit if the output signal is abnormal;
An external output step that outputs to the outside that an abnormality has occurred in the step drive unit when it is determined that an abnormality has occurred in the step drive unit;
In the signal processing step,
The output signal at the time of the maintenance inspection is compared with a reference value, and when there is a deviation greater than a preset threshold value for both, it is determined that an abnormality has occurred in the wheel.
Escalator diagnostic method.

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