CN110015606B

CN110015606B - Escalator diagnosis device and escalator diagnosis method

Info

Publication number: CN110015606B
Application number: CN201811587775.8A
Authority: CN
Inventors: 植竹英明
Original assignee: Toshiba Elevator Co Ltd
Current assignee: Toshiba Elevator and Building Systems Corp
Priority date: 2018-01-10
Filing date: 2018-12-25
Publication date: 2020-06-30
Anticipated expiration: 2038-12-25
Also published as: JP2019119572A; CN110015606A; JP6462908B1

Abstract

An escalator diagnostic device and an escalator diagnostic method, wherein in the prior art, the maintenance and repair work has room for further high efficiency. The escalator diagnosis device diagnoses a step driving part, and the step driving part comprises: step wheels provided to steps of the escalator, which move along the guide rails while contacting the guide rails, thereby lifting and lowering the steps; and a step chain for moving the step wheel, wherein the step chain comprises: a signal processing unit that processes an output signal from a strain detection unit that detects strain occurring in the guide rail on the main surface of the guide rail during maintenance and inspection, and determines that an abnormality has occurred in the step driving unit when the output signal is abnormal; and an external output unit that outputs the abnormal condition of the step driving unit to the outside when the abnormal condition occurs in the step driving unit, wherein the signal processing unit compares an output signal at the time of maintenance and inspection with a reference value, and determines that the abnormal condition occurs in the wheel when the output signal deviates by a predetermined threshold value or more.

Description

Escalator diagnosis device and escalator diagnosis method

The present application was made on the basis of japanese patent application 2018-001657 (application date 1/10 of 2018), and claims priority based on the above application. The present application incorporates the entire contents of the above-identified application by reference thereto.

Technical Field

The embodiment of the invention relates to an escalator diagnosis device and an escalator diagnosis method.

Background

Conventionally, in an escalator, maintenance and inspection are periodically performed in order to ensure high safety. In maintenance and inspection of a conventional escalator, a landing plate of the escalator is removed, and states of respective parts and operation states are visually checked.

However, in the conventional technique, there is room for further improvement in efficiency of maintenance work.

Disclosure of Invention

An escalator diagnostic device of an embodiment diagnoses a step driving part, and the step driving part comprises: a step wheel provided on a step of an escalator, the step wheel being in contact with a guide rail and moving along the guide rail to lift and lower the step; and a step chain for moving the step wheel, wherein the escalator diagnostic device comprises: a signal processing unit that processes an output signal from a strain detection unit that detects a strain occurring in the guide rail on a main surface of the guide rail during maintenance and inspection, and determines that an abnormality has occurred in the step driving unit when the output signal is abnormal; and an external output unit configured to output the step driving unit to the outside when an abnormality occurs in the step driving unit, wherein the signal processing unit compares the output signal at the time of maintenance and inspection with a reference value, and determines that an abnormality occurs in the wheel when there is a deviation of a predetermined threshold value or more between the output signal and the reference value.

According to the escalator diagnosis device with the structure, labor saving and time reduction of maintenance and repair operation can be realized. Moreover, early abnormality detection can be performed.

Drawings

Fig. 1 is a diagram showing a schematic configuration of an escalator according to embodiment 1.

Fig. 2 is a diagram showing a schematic structure of a step periphery and an escalator diagnostic device according to embodiment 1.

Fig. 3 is a diagram showing a schematic configuration of the strain sensor according to embodiment 1.

Fig. 4 is a flowchart showing an example of the procedure of the escalator diagnosis process according to embodiment 1.

Fig. 5 is a diagram showing a schematic configuration of a step periphery and an escalator diagnostic device according to modification 1 of embodiment 1.

Fig. 6 is a diagram showing a schematic configuration of a step periphery and an escalator diagnostic device according to modification 2 of embodiment 1.

Fig. 7 is a diagram showing a schematic configuration of the periphery of the reference step according to modification 3 of embodiment 1 and an escalator diagnostic device.

Fig. 8 is a diagram showing a schematic configuration of a position detection unit according to modification 3 of embodiment 1.

Fig. 9 is a flowchart showing an example of the procedure of the escalator diagnosis process according to modification 3 of embodiment 1.

Fig. 10 is a flowchart showing an example of the procedure of the escalator diagnosis process according to embodiment 2.

Fig. 11 is a diagram showing a schematic structure of a step periphery and an escalator diagnostic device according to embodiment 4.

Fig. 12 is a flowchart showing an example of the procedure of the escalator diagnosis process according to the modification of embodiment 4.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings. The present invention is not limited to the following embodiments. The components in the following embodiments include components that can be easily conceived or substantially similar by those skilled in the art.

[ embodiment 1]

(structural example of escalator)

Fig. 1 is a diagram showing a schematic configuration of an escalator 1 according to embodiment 1. As shown in fig. 1, the escalator 1 includes a plurality of steps 100, 1 pair of

balustrade panels

101a, 101b,

handrail belts

102a, 102b, and

landing doors

103a, 103 b.

The plurality of steps 100 are coupled in a ring shape. Each step 100 is a member serving as a landing point when the user R of the escalator 1 gets on the escalator 1, and is supported by a truss, not shown, with a predetermined inclination angle. The drive motor, not shown, rotates

sprockets

105a and 105b provided at the upper and lower ends of the truss, thereby causing each step 100 to move cyclically as a stepped landing between the landing entrance 103a and the landing entrance 103 b. That is, each step 100 moves while circulating between the entrance 103a and the exit 103 b. Each step 100 is formed of, for example, cast aluminum.

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

The

balustrade panels

101a and 101b are provided on both sides of the steps 100 in the width direction of the escalator 1. The

balustrade panels

101a and 101b are provided to face each other across the plurality of steps 100. The

balustrade panels

101a and 101b are made of, for example, transparent glass or acryl.

The

handrail belts

102a and 102b are members to be gripped by the user R with the hand. The

handrail belts

102a and 102b are endless belts, and are movably wound around the respective peripheral edges of the

balustrade panels

101a and 101 b. The

handrail belts

102a and 102b are moved by the drive motor in synchronization with the movement of each step 100. The

handrail belts

102a, 102b are formed of rubber or the like, for example.

The

landing ports

103a and 103b are provided with

landing plates

104a and 104b, respectively. The

landing boards

104a and 104b are landing points at which the user R lands on the escalator 1. The

access panels

104a and 104b are detachably provided. A drive motor, a folded step 100, and the like are housed below the

boarding plates

104a, 104 b.

(example of the step drive portion)

Next, the configuration of the step driving portion 200 that drives the steps 100 will be described with reference to fig. 2. Fig. 2 is a diagram showing a schematic configuration of the periphery of the step 100 according to embodiment 1 and the escalator diagnostic device 10.

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

In the step 100, a step driving portion 200 is provided on the guide rail 300. The step driving portion 200 includes a step front wheel 220, a step rear wheel 230, and a step chain 240.

The guide rails 300 are provided on a truss, not shown, so as to extend along the inclination angle of the truss, and form 1 pair on both sides of the step 100. The guide rail 300 includes a plate-like member and 1 pair of side walls standing upright on both sides in the short side direction of the member. The plate-like member provided in the guide rail 300 constitutes a main surface of the guide rail 300. That is, the upper surface (a surface with which the front step wheels 220 and the like described later contact) and the lower surface of the guide rail 300 are main surfaces of the guide rail 300.

The front step wheels 220 are, for example, 2 pairs of wheels connected by an axle 221. The 2 pairs of step front wheels 220 are provided to be in contact with the guide rails 300 on both sides of the step 100, respectively. The step rear wheel 230 is, for example, 1 pair of wheels connected by an axle 231. The pair of step rear wheels 230 are located inside the step front wheels 220 (close to the steps 100) and are provided so as to contact the guide rails 300 on both sides of the steps 100. The step wheels are mainly configured by 2 pairs of step front wheels 220 and 1 pair of step rear wheels 230.

The step chain 240 is composed of, for example, 1 pair of chains connecting 2 pairs of front step wheels 220 to each other, and 1 pair of chains connecting 2 pairs of front step wheels 220 and 1 pair of rear step wheels 230. The 1 pair of step chains 240 are connected to the axles of the 2 pairs of step front wheels 220 to thereby link the 2 pairs of step front wheels 220 to each other. The other 1 pair of step chains 240 are connected to the axles of the 2 pair of front step wheels 220 and the 1 pair of rear step wheels 230, thereby connecting the front step wheels 220 and the rear step wheels 230.

In the step driving portion 200, the step chain 240 is fed by a driving motor not shown. Thereby, 2 pairs of front step wheels 220 and 1 pair of rear step wheels 230 travel along the guide rail 300, thereby lifting and lowering the steps 100 along the inclination angle of the truss. The number and arrangement of the guide rail 300, the front step wheel 220, the rear step wheel 230, and the step chain 240 can be variously changed, and are not limited to the above-described configurations.

The strain detector 40 is provided on the upper surface of the guide rail 300. The strain detection unit 40 includes a plurality of strain sensors 40a that detect the strain of the guide rail 300 caused by the passage of the step wheel. Specifically, the strain sensor 40a is provided at 2 positions on the track 220t through which the front step wheel 220 passes and the track 230t through which the rear step wheel 230 passes, for example, for 1 guide rail 300. That is, the strain sensors 40a are provided in 1 pair on each of the guide rails 300 on both sides of the step 100, and 2 pairs in total are provided. The detailed structure of the strain sensor 40a will be described later.

(structural example of escalator diagnostic device)

Next, the structure of the escalator diagnostic device 10 will be described with reference to fig. 2.

In the escalator 1, maintenance and inspection are periodically performed to ensure high safety. The maintenance and inspection are performed manually or by a timed automatic operation or the like when there is no user R before or after the start of business of the facility in which the escalator 1 is installed. The escalator 1 is configured to be capable of switching between a normal operation mode and an inspection mode during maintenance and inspection. In maintenance and inspection, the escalator 1 is operated in an inspection mode, and an output signal from the strain detecting section 40 is obtained in a state where there is no user R.

As shown in fig. 2, the escalator diagnostic device 10 is electrically connected to a strain detection unit 40, and includes a control unit 20 and a storage unit 30. Each part of the escalator diagnostic device 10 is communicably connected via an arbitrary communication line.

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 the installation-time inspection mode data 31. The inspection mode data 31 during installation is data of an output signal obtained from the strain detection unit 40 in a state where the escalator 1 is operated in the inspection mode at the time of installation of the escalator 1 and the user R is not present. The set-time inspection mode data 31 is a reference value for an output signal at the time of maintenance and inspection, which will be described later.

The control unit 20 includes a microcomputer having a CPU (central processing unit) connected to each other by a common bidirectional common bus, a ROM (Read only Memory) in which a predetermined control program and the like are stored in advance, a RAM (Random Access Memory) in which an operation result of the CPU is temporarily stored, a backup RAM, and an input/output port device, and a drive circuit. The control section 20 functionally conceptually includes an input section 21, a signal processing section 22, and an external output section 23.

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

When the signal processing unit 22 acquires the output signal from the strain detection unit 40 during maintenance and inspection, it processes the output signal and determines whether or not the output signal is abnormal. Specifically, the signal processing unit 22 compares the installation-time inspection mode data 31 (reference value) stored in the storage unit 30 with the data of the output signal obtained at the time of maintenance inspection, and determines whether or not the output signal at the time of maintenance inspection is abnormal. When the output signal is abnormal during maintenance, it means that some abnormality occurs in the step driving portion 200 of the escalator 1.

As an example of abnormality detection, for example, the following may be considered: any one or more of the front step wheels 220 and the rear step wheels 230 are laterally offset from the predetermined track. In this case, a portion where the front step wheel 220 or the rear step wheel 230 contacts the strain detection portion 40 is a part. Therefore, even if the front step wheel 220 or the rear step wheel 230 passes through the strain detection unit 40, the amount of deformation of the strain detection unit 40 is smaller than that in the normal state, and the output signal is also smaller. As another example of the abnormality detection, for example, the following may be mentioned: one or more of the front step wheels 220 and the rear step wheels 230 are broken. In this case, the output signal from the strain detector 40 becomes small or is not detected at all. If a defect such as a protrusion occurs in a damaged wheel, the output signal may suddenly increase.

That is, when a normal wheel passes through 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 value protruding from a constant intensity, or a concave peak value. When such a deviation between the peak value and the reference value is equal to or greater than a predetermined threshold value, it is determined that the output signal is abnormal during maintenance and inspection. The threshold value is obtained from, for example, a specification value of the escalator 1. When the output signal during maintenance and inspection is abnormal, the signal processing unit 22 determines that some abnormality has occurred in the step driving unit 200 of the escalator 1.

When it is determined that the output signal from the strain detector 40 is abnormal, the external output unit 23 outputs the step driving unit 200 to the outside when the abnormality occurs. The output to the outside is, for example, a report or broadcast of an alarm for the person in charge of monitoring, a warning display for a monitoring center not shown, a mail transmission for the person in charge of maintenance, or the like.

(example of the configuration of the deformation sensor)

Here, the detailed configuration of the strain sensor 40a included in the strain detector 40 will be described with reference to fig. 3. Fig. 3 is a diagram showing a schematic configuration of a strain sensor 40a according to embodiment 1.

As shown in fig. 3, the strain sensor 40a is a metal strain gauge, and includes: a meter 40G extending in one direction while meandering in a zigzag manner; a base 40B supporting the measuring instrument 40G; and a lead wire 40L leading out an output signal from the meter 40G. 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 measuring instrument 40G generates a predetermined voltage corresponding to the amount of deformation by deforming itself by being applied with a load or the like.

When the escalator 1 is operated, the step front wheel 220 and the step rear wheel 230 travel along the guide rail 300. At this time, a predetermined amount of deformation is generated in the guide 300. When the front step wheel 220 and the rear step wheel 230 pass over the strain sensor 40a, respectively, 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.

The strain sensor 40a is provided on the upper surface of the guide rail 300, but may be provided on the lower surface. This can prevent the strain sensor 40a from being damaged by the step wheel or the like. In this way, the strain sensor 40a (strain detector 40) may be provided on either the upper surface or the lower surface, which is the main surface of the guide rail 300. However, the amount of deformation of the guide rail 300 due to the step wheels or the like is large on the upper surface of the guide rail 300. Therefore, the strain sensor 40a is provided on the upper surface of the guide rail 300, and thus the output signal increases, and a more minute strain can be detected.

(example of escalator diagnostic treatment)

Next, a diagnosis process of the escalator diagnosis device 10 will be described with reference to fig. 4. Fig. 4 is a flowchart showing an example of the procedure of the escalator diagnosis process according to embodiment 1.

In step S11, the input unit 21 provided in the control unit 20 of the escalator diagnostic device 10 acquires the output signal from the strain detection unit 40 detected at the time of installation of the escalator 1, and stores the output signal in the storage unit 30 as the installation-time inspection mode data 31.

In step S12, the input unit 21 of the control unit 20 acquires an output signal from the strain detection unit 40 detected during maintenance and inspection of the escalator 1.

In step S13, the signal processing unit 22 of the control unit 20 compares the output signal at the time of installation of the escalator 1 with the output signal at the time of maintenance and inspection.

If the deviation of the 2 output signals is smaller than the threshold value in step S14 (no), the process returns to step S12, and the following procedure is repeated. If the deviation of the 2 output signals is equal to or greater than 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 S15.

In conclusion, the diagnosis process of the escalator diagnosis device 10 is ended. When an abnormality of the escalator 1 is output to the outside, for example, an operator removes the

landing plates

104a and 104b of the escalator 1, visually checks the states and operation states of the respective parts, and performs a necessary maintenance operation.

In the conventional escalator, during maintenance and inspection, an operator must detach the boarding/alighting plate of the escalator and visually check the state and operation state of each part. Maintenance and inspection are performed daily to ensure the safety of the escalator, and the burden on the operator is large. Also, visual confirmation takes time and the running time of the escalator is reduced.

According to the escalator diagnostic device 10 of embodiment 1, it is possible to detect an abnormality of the front step wheels 220 and the rear step wheels 230 in the escalator 1 without checking the

landing plates

104a and 104b without removing them. Thus, labor and time for maintenance and inspection work can be reduced. Moreover, early abnormality detection can be performed.

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

(modification 1)

Next, modification 1 of embodiment 1 will be described. The escalator diagnostic device of modification 1 differs from escalator diagnostic device 10 of embodiment 1 in the configuration of the strain detection section. Hereinafter, only the differences from the escalator diagnostic device 10 according to embodiment 1 will be described with reference to fig. 5. Fig. 5 is a diagram showing a schematic configuration of the periphery of the step 100 according to the modification 1 of the embodiment 1 and the escalator diagnostic device 10.

As shown in fig. 5, the strain sensors 40a included in the strain detector 41 of modification 1 are disposed, for example, in the vicinity of both ends of the guide rail 300 and in the region sandwiched between both ends of the guide rail 300 at equal intervals. That is, the strain sensors 40a are provided at a plurality of locations on the track 220t through which the front step wheel 220 passes. The strain sensors 40a are provided at a plurality of positions on the rail 230t through which the rear step wheel 230 passes. As described above, in the escalator diagnostic device 10 according to modification 1, the plurality of strain sensors 40a are arranged in a distributed manner over the entire area of the guide rail 300.

According to the escalator diagnostic device 10 of modification 1, the plurality of strain sensors 40a are provided on 1 track 220t (or track 230t), and the accuracy of abnormality detection is higher.

(modification 2)

Next, modification 2 of embodiment 1 will be described. The escalator diagnostic device of modification 2 is different from escalator diagnostic device 10 of embodiment 1 in the configuration of the strain detection section. Hereinafter, only the differences from the escalator diagnostic device 10 according to embodiment 1 will be described with reference to fig. 6. Fig. 6 is a diagram showing a schematic configuration of the periphery of the step 100 according to the modification 2 of the embodiment 1 and the escalator diagnostic device 10.

As shown in fig. 6, the strain sensors 42a included in the strain detector 42 of modification example 2 have a longer gauge length than the strain sensor 40a of embodiment 1. The gauge length of the strain sensor 42a is, for example, equal to or longer than the distance Ro that the front step wheel 220 (or the rear step wheel 230) advances when rotating for 1 revolution. However, the present invention is not limited to the example of fig. 6, and a plurality of strain sensors 40a according to embodiment 1 may be connected so that the entire measuring instrument is longer by a distance Ro or more.

According to the escalator diagnostic device 10 of modification 2, since the length of the gauge of the strain sensor 42a is set to be equal to or longer than the distance Ro by which the front step wheel 220 (or the rear step wheel 230) advances when rotating for 1 revolution, it is possible to detect an abnormality of the entire contact surface where the front step wheel 220 (or the rear step wheel 230) contacts the guide rail 300. Thus, for example, even in a case where a part of the front step wheel 220 (or the rear step wheel 230) is damaged, an abnormality can be detected. That is, the accuracy of abnormality detection is higher.

(modification 3)

Next, modification 3 of embodiment 1 will be described. The escalator diagnostic device of modification 3 is different from the escalator diagnostic device 10 of embodiment 1 in that it includes a position detection unit that detects the position of the steps 100. Hereinafter, only the differences from the escalator diagnostic device 10 according to embodiment 1 will be described with reference to fig. 7 to 9. Fig. 7 is a diagram showing a schematic configuration around a reference step 100s according to modification 3 of embodiment 1 and the escalator diagnostic device 10.

The position detection unit of modification 3 can also be applied to the escalator diagnostic device 10 of any of embodiment 1 and modifications 1 and 2 described above. Fig. 7 shows a case where the position detection unit 50 is applied to the escalator diagnostic device 10 according to embodiment 1. As shown in fig. 7, the escalator 1 according to modification 3 is provided with a reference step 100s including a reference step detection portion 51 in a step support portion 250. The escalator diagnostic device 10 according to modification 3 specifies the position of the step 100 where the abnormality occurs, based on 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). The position information of the step 100 in which the abnormality has occurred is stored in the storage unit 30 as the abnormal step position information 50i, for example. The position detection unit and the strain detection unit 40 including the reference step detection unit 51 and the pulse generator 106 are connected to the escalator diagnostic device 10 of modification 3.

Fig. 8 is a diagram showing a schematic configuration of the position detection unit 50 according to modification 3 of embodiment 1. As shown in fig. 8, the position detection unit 50 includes a reference step detection unit 51 of a reference step 100s, a reference point switch 51a, a switch support unit 51b, and a pulse generator 106.

The reference step detection portion 51, the reference point switch 51a, and the switch support portion 51b are housed in the machine room 107 below the reference step 100s together with the reference step 100s and the step front wheels 220, the step rear wheels 230, the guide rail 300, and the like of the plurality of steps 100.

The reference step detection portion 51 of the reference step 100s is a plate-shaped member provided at the lower end of the step support portion 250. The reference point switch 51a has a shape (U-shape) in which one side of the frame is open. The reference step detection unit 51 detects the passage of the reference step 100s by passing through the inside of the U-shaped structure of the reference point switch 51 a. One end of the switch support 51b is attached to the lower surface of the guide rail 300, and the reference point switch 51a is attached to the other end. Thus, the switch support portion 51b disposes the reference point switch 51a at the passage position of the reference step detection portion 51. The reference point switch 51a and the switch support portion 51b are arranged at positions parallel to the strain sensor 40a, for example, in a direction orthogonal to the traveling direction of the reference step 100 s.

Here, the passage of the reference step 100s is detected by the reference point switch 51 a. Then, it is assumed that the deformation sensor 40a above the reference point switch 51a detects an abnormality after the count of the pulse generator 106 reaches, for example, a 100 count value. The position detection unit 50 can determine how far the reference step 100s has advanced when the reference step 100s reaches the count value of 100 after passing. That is, the step 100 in which an abnormality is detected can be identified, such as the step 100 located above the strain sensor 40a when the strain sensor 40a detects an abnormality, for example, the 5 th step 100 from the reference step 100 s. The signals from the pulse generator 106 and the reference point switch 51a are acquired by the input unit 21 of the escalator diagnostic device 10, and the position information (abnormal step position information 50i) of the step 100 having the abnormality thus identified is stored in the storage unit 30, for example.

When an abnormality is detected at a predetermined step 100, maintenance and inspection are immediately performed. The maintenance and inspection in this case is maintenance and inspection with intervention of an operator. The escalator diagnostic device 10 moves the step 100, in which an abnormality is detected, to a predetermined inspection position based on the abnormal step position information 50i at the next inspection and repair time of human intervention, that is, at the latest inspection and repair time after an abnormality is detected. The predetermined inspection position is, for example, a position directly below the

access panels

104a and 104 b.

Although the reference step detection portion 51 is provided on the step support portion 250 of the reference step 100s, it may be provided on either the front step wheel 220 or the rear step wheel 230. In this case, the reference step detection portion 51 is a minute protrusion-shaped member (not shown) of such a degree that the reference step 100s does not vibrate. The reference step 100s is detected as a change in the output signal of the predetermined strain sensor 40 a. This eliminates the need for the reference point switch 51a and the switch support portion 51 b. That is, in the above configuration, the reference step detection unit 51, the strain sensor 40a, and the pulse generator 106 function as the position detection unit 50.

Next, a diagnosis process of the escalator diagnosis device 10 according to modification 3 will be described with reference to fig. 9. Fig. 9 is a flowchart showing an example of the procedure of the escalator diagnosis process according to modification 3 of embodiment 1. Here, the processing after the end of step S11 to step S13 will be described.

When the deviation of the 2 output signals is equal to or greater than the threshold value in step S14 (yes), the position of the step 100 in which 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 50 i.

In step S32, the escalator diagnostic device 10 of modification 3 reads the stored position information at the time of the next maintenance and inspection. Based on the position information, the escalator diagnostic device 10 according to modification 3 moves the step 100 in which the abnormality has occurred to a predetermined inspection position.

According to the escalator diagnostic device 10 of modification 3, the location where the abnormality occurs can be easily identified. Further, since the abnormality occurrence portion is automatically moved to a predetermined inspection position, it is possible to reduce the maintenance and inspection time and to suppress the overlooking of the abnormality portion.

[ embodiment 2]

Next, embodiment 2 will be explained. The escalator diagnostic device according to embodiment 2 is different from the escalator diagnostic device 10 according to embodiment 1 in diagnosing extension of the step chain 240. Hereinafter, only the differences from the escalator diagnostic device 10 according to embodiment 1 will be described with reference to fig. 10. Fig. 10 is a flowchart showing an example of the procedure of the escalator diagnosis process according to embodiment 2.

The escalator diagnostic device 10 according to embodiment 2 can also be applied to any of the escalator diagnostic devices 10 according to embodiment 1 and modifications 1 to 3 described above. An application example of the escalator diagnostic device 10 according to embodiment 1 will be described below.

In step S41, the input unit 21 provided in the control unit 20 of the escalator diagnostic device 10 acquires the output signal from the strain detection unit 40 detected at the time of installation of the escalator 1, and stores the output signal in the storage unit 30 as the installation-time inspection mode data 31. The set-time inspection mode data 31 also includes an output cycle of the output signal as data. The output period of the output signal refers to a length between a peak of the output signal when the wheel of a predetermined step 100 passes over a predetermined deformation sensor 40a and a peak of the output signal when the wheel of a subsequent step 100 passes over the deformation sensor 40 a. The output cycle of the output signal is a predetermined value with respect to the output cycle of the output signal at the time of maintenance and inspection, which will be described later.

In this way, it is preferable to use data of the output signal when the same individual escalator 1 is installed as the predetermined value of the output cycle. This is because: the setting of the travel speed may be different for each escalator 1, and in this case, the output cycle is also different.

In step S42, the input unit 21 acquires an output signal from the strain detection unit 40 detected during maintenance and inspection of the escalator 1. The data acquired during the maintenance and inspection also includes the output cycle of the output signal.

In step S43, the signal processing unit 22 of the control unit 20 compares the output cycle (predetermined value) at the time of installation of the escalator 1 with the output cycle at the time of maintenance and inspection.

If the deviation of 2 output signal cycles is smaller than the threshold value in step S44 (no), the process returns to step S42, and the following procedure is repeated. In step S44, if the deviation of the 2 output signal periods is equal to or greater than the threshold value (yes), the signal processing unit 22 determines that the output signal period during maintenance and inspection is abnormal.

The escalator 1 is usually operated at a constant speed. The interval at which the wheels of the respective steps 100 pass over the predetermined deformation sensor 40a is also constant. When a deviation equal to or greater than a threshold value is found with respect to the output signal cycle at the time of maintenance and inspection, the passing interval of each step 100 above the strain sensor 40a is shifted (delayed). This means that the step chain 240 is elongated due to deterioration or the like. The threshold value is obtained from, for example, a specification value of the escalator 1. The signal processing unit 22 determines that the step chain 240 is stretched when the output signal cycle is abnormal during maintenance and inspection.

In step 45, the outside output unit 23 of the control unit 20 outputs the abnormality of the escalator 1 to the outside. In conclusion, the diagnosis process of the escalator diagnosis device 10 is ended.

According to the escalator diagnostic device 10 of embodiment 2, even if the confirmation is performed without removing the

landing plates

104a and 104b, the extension of the step chain 240 can be detected. Thus, labor and time for maintenance and inspection work can be reduced. Also, early abnormality detection can be realized.

[ embodiment 3]

Next, an escalator diagnostic device according to embodiment 3 will be described. The escalator diagnostic device according to embodiment 3 is different from the escalator diagnostic device 10 according to embodiment 1 in that deformation of the guide rail 300 is diagnosed. Hereinafter, only the differences from the escalator diagnostic device 10 according to embodiment 1 will be described with reference to fig. 4 and 5.

As shown in fig. 5 cited above, the distortion detection unit 41 according to modification 1 of embodiment 1 is applied to the escalator diagnostic device 10 of embodiment 3, for example. It is preferable to use data of the output signal when the same individual escalator 1 is installed as the reference value of the output signal of the strain detector 41 during maintenance and inspection. This is because: when the guide rail 300 is installed, although it is extremely rare, initial strain may occur, and the amount of the initial strain may vary depending on each escalator 1. And also because: the deformation of the guide rail 300 is usually extremely small, and higher accuracy is required than the abnormality detection of the step driving portion 200.

The signal processing unit 22 compares the output signal at the time of installation of the escalator 1 with the output signal at the time of maintenance and inspection, and determines that the guide rail 300 of the escalator 1 is deformed when the output signals deviate by a predetermined threshold value or more. The threshold value is obtained from, for example, a specification value of the escalator 1.

Referring to fig. 4, a description will be given of a process in a case where the escalator diagnostic device 10 according to embodiment 3 is used for maintenance and inspection after an earthquake occurs.

In step S11, the control unit 20 of the escalator diagnostic device 10 stores the output signal from the set-time strain detection unit 40 of the escalator 1 in the storage unit 30 as the set-time inspection mode data 31.

When an earthquake occurs, an earthquake occurrence signal is emitted from an unillustrated earthquake detector.

In step S12, 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 conclusion, the diagnosis process of the escalator diagnosis device 10 is ended. The escalator 1 in which the deformation of the guide rail 300 is detected is brought into a stopped state until the repair work by the operator is completed.

According to the escalator diagnostic device 10 of embodiment 3, since the plurality of strain sensors 40a are provided on 1 track 220t (or track 230t), it is possible to easily detect not only the strain of the step front wheel 220 (or step rear wheel 230), but also the residual strain of the guide rail 300 due to an earthquake or the like, for example. Therefore, if the maintenance and inspection by the escalator diagnostic device 10 according to embodiment 2 is performed after the occurrence of an earthquake as described above, it can be helpful to determine whether or not the re-operation of the escalator 1 is possible.

[ embodiment 4]

Next, an escalator diagnostic device according to embodiment 4 will be described. The escalator diagnostic device according to embodiment 4 is different from the escalator diagnostic device 10 according to embodiment 1 in that the loading state of the escalator 1 is determined. Hereinafter, only the differences from the escalator diagnostic device 10 according to embodiment 1 will be described with reference to fig. 11 and 12. Fig. 11 is a diagram showing a schematic configuration of the periphery of the step 100 according to embodiment 4 and the escalator diagnostic device 10.

As shown in fig. 11, the escalator diagnostic device 10 according to embodiment 4 is preferably applied to the strain detection unit 41 according to modification 1 of embodiment 1, for example. The storage unit 30 of the escalator diagnostic device 10 stores the installation-time loading data 32. The set-time load data 32 is data of an output signal obtained from the strain detection unit 40 in a state where the escalator 1 is operated in the operation mode at the time of setting the escalator 1 and a load is applied to the escalator 1. The state in which the load is applied can be formed by, for example, riding a person imitating the user R. In this case, for example, it is preferable to acquire data in several levels, such as the number of passengers of the escalator 1 being 1 or more, the number of passengers boarding a plurality of steps 100 at equal intervals, and the number of passengers boarding the maximum load. When the loading load increases, the amount of deformation of the guide rail 300 also increases, and the output signal from the deformation detecting unit 41 also increases.

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

Next, the processing of the escalator diagnostic device 10 according to embodiment 4 will be described with reference to fig. 12. Fig. 12 is a flowchart showing an example of the procedure of the escalator diagnosis process according to the modification of embodiment 4.

In step S51, the input unit 21 provided in the control unit 20 of the escalator diagnostic device 10 acquires the output signal from the strain detection unit 40 in the load state at the time of installation of the escalator 1, and stores the output signal in the storage unit 30 as the installation-time load data 32.

In step S52, the input unit 21 acquires an output signal from the strain detection unit 40 during operation of the escalator 1.

In step S53, the signal processing unit 22 of the control unit 20 compares the sum of the output signals at the time of installation of the escalator 1 with the sum of the output signals at the time of operation, and determines the loading state of the escalator 1.

If the output signal at the time of operation is smaller than the threshold value in step S54 (no), the process returns to step S52, and the following procedure is repeated. If the output signal during operation is equal to or greater than the threshold value (yes) in step S54, the control unit 20 performs operation adjustment of the escalator 1 in step S55.

According to the escalator diagnostic device 10 of embodiment 4, it is possible to suppress the occurrence of an overload applied to the escalator 1. Further, it is possible to avoid stopping the escalator 1 in order to protect the escalator 1.

As described above, although the embodiments of the present invention have been described, the above embodiments are merely presented as examples, and are not intended to limit the scope of the invention. The above-described new embodiments may be implemented in other various forms, and various omissions, substitutions, and changes may be made without departing from the spirit of the invention. The above-described embodiments and modifications thereof are also included in the scope and gist of the invention, and are also included in the inventions described in the claims and their equivalent scope.

Claims

1. An escalator diagnostic device, which diagnoses a step driving part,

the step driving section includes:

a step wheel provided on a step of an escalator, the step wheel being in contact with a guide rail and moving along the guide rail to lift and lower the step; and

a step chain for moving the step wheels,

the escalator diagnostic device comprises:

a signal processing unit that processes an output signal from a strain detection unit that detects a strain occurring in the guide rail on a main surface of the guide rail during maintenance and inspection, and determines that an abnormality has occurred in the step driving unit when the output signal is abnormal; and

an external output unit for outputting the abnormal condition of the step driving unit to the outside when the abnormal condition occurs in the step driving unit,

the signal processing unit compares the output signal during the maintenance and inspection with a reference value, and determines that an abnormality has occurred in the step wheel when there is a deviation of a predetermined threshold value or more between the output signal and the reference value.

2. The escalator diagnostic device of claim 1, wherein,

a storage part for storing the output signal of the deformation detection part detected when the escalator is arranged,

the strain detection unit includes a plurality of strain sensors provided at a plurality of positions including the vicinity of both end portions of the guide rail,

the signal processing unit compares the output signal at the time of maintenance and inspection with the output signal at the time of installation of the escalator, and determines that the guide rail is deformed when the output signal and the output signal deviate by a predetermined threshold value or more.

3. The escalator diagnostic device of claim 1, wherein,

the length of the gauge of the strain detection unit extending in the extending direction of the guide rail is set to be equal to or longer than the distance that the step wheel advances when rotating for 1 cycle.

4. The escalator diagnostic device according to any one of claims 1-3, wherein,

the disclosed device is provided with:

a position detection unit that detects a position of the step; and

and a control unit which, when it is determined that an abnormality occurs in the step driving unit, determines a step in which an abnormality occurs in the step driving unit based on the output signal of the deformation detecting unit determined to be abnormal at the time of maintenance and inspection and the position of the step detected by the position detecting unit, and moves the step in which an abnormality occurs in the step driving unit to a predetermined inspection position at the time of next maintenance and inspection.

5. The escalator diagnostic device according to any one of claims 1-3, wherein,

the signal processing unit detects an output period of the output signal of the strain detection unit, and determines that the step chain is stretched when the output period is shifted from a predetermined value.

6. The escalator diagnostic device of claim 2, wherein,

the output signal when the escalator is set is obtained in a state that a loading load is applied to the escalator,

the signal processing unit compares an output signal from the strain detection unit in a state where the escalator is in operation with an output signal of the escalator when the escalator is set, and determines a loading state of the escalator.

7. An escalator diagnosis method, which diagnoses a step driving part,

the step driving section includes:

a step chain for moving the step wheels,

the escalator diagnosis method comprises the following steps:

a deformation detection step during maintenance, wherein when maintenance and repair are performed at a preset time, the deformation detection part sends out the deformation generated on the guide rail as an output signal;

a signal processing step of processing the output signal and determining that an abnormality occurs in the step driving portion when the output signal is abnormal; and

an external output step of outputting the step driving portion to the outside when it is determined that the step driving portion is abnormal,

in the signal processing step, the output signal at the time of maintenance and inspection is compared with a reference value, and when there is a deviation of a predetermined threshold value or more between the output signal and the reference value, it is determined that an abnormality has occurred in the step wheel.