CN110015606B - Escalator diagnosis device and escalator diagnosis method - Google Patents

Abstract

An escalator diagnostic device and an escalator diagnostic method are provided. In the prior art, there is room for further efficiency improvement in maintenance and inspection operations. The escalator diagnosis device diagnoses the step drive part, and the step drive part includes: step wheels, which are arranged on the steps of the escalator, contact the guide rails and travel along the guide rails, thereby making the steps go up and down; and step chains, which make the step wheels travel, It is provided with: a signal processing unit, which processes the output signal from the deformation detection unit that detects the deformation generated on the guide rail on the main surface of the guide rail during maintenance and inspection, and determines that an abnormality occurs in the step drive part when the output signal is abnormal; and the external output part, when an abnormality occurs in the step drive part, it outputs the abnormality in the step drive part to the outside, and the signal processing part compares the output signal during maintenance and inspection with the reference value. When the deviation is greater than or equal to a predetermined threshold value, it is determined that an abnormality has occurred in the wheel.

Description

Escalator diagnosis device and escalator diagnosis method

This application is made on the basis of Japanese Patent Application No. 2018-001657 (filed on January 10, 2018), and claims priority based on the above-mentioned application. This application includes the entire contents of the above application by reference to the above application.

technical field

Embodiments of the present invention relate to an escalator diagnostic apparatus and an escalator diagnostic method.

Background technique

Conventionally, in order to ensure high safety, escalators have been regularly maintained and inspected. Regarding the maintenance and inspection of the conventional escalator, the steps of the escalator are removed, and the state and operation state of each part are visually checked.

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

SUMMARY OF THE INVENTION

The escalator diagnosis apparatus according to the embodiment diagnoses a step drive unit including step wheels provided on the steps of the escalator, which are in contact with guide rails and travel along the guide rails, thereby raising and lowering the steps; and a step chain to make the step wheels travel, and the escalator diagnosis device includes: a signal processing unit for processing an output signal from a deformation detection unit that detects deformation generated on the guide rail on the main surface of the guide rail during maintenance and inspection, and when When the output signal is abnormal, it is determined that an abnormality has occurred in the step driving unit; and the external output unit, when an abnormality occurs in the step driving unit, outputs to the outside that an abnormality has occurred in the step driving unit, and the above The signal processing unit compares the output signal at the time of the maintenance and inspection with a reference value, and determines that an abnormality has occurred in the wheel when there is a difference between the two by a predetermined threshold value or more.

According to the escalator diagnostic apparatus of the above-mentioned configuration, labor saving and time reduction of maintenance and inspection work can be achieved. Also, early abnormality detection can be performed.

Description of drawings

FIG. 1 is a diagram showing a schematic configuration of an escalator according to Embodiment 1. FIG.

FIG. 2 is a diagram showing a schematic configuration of a step and its vicinity and an escalator diagnostic apparatus according to Embodiment 1. FIG.

3 is a diagram showing a schematic configuration of a strain sensor according to Embodiment 1. FIG.

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

5 is a diagram showing a schematic configuration of a step and its vicinity and an escalator diagnostic device according to Modification 1 of Embodiment 1. FIG.

6 is a diagram showing a schematic configuration of a step and its vicinity and an escalator diagnostic device according to Modification 2 of Embodiment 1. FIG.

FIG. 7 is a diagram showing a schematic configuration around a reference step and an escalator diagnostic device according to Modification 3 of Embodiment 1. 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 a procedure of an 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 the second embodiment.

FIG. 11 is a diagram showing a schematic configuration of a step and its vicinity and an escalator diagnostic device according to Embodiment 4. FIG.

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

Detailed ways

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

[Embodiment 1]

(Example of structure of escalator)

1 : is a figure which shows the schematic structure of the escalator 1 which concerns on Embodiment 1. FIG. As shown in Fig. 1 , the escalator 1 includes a plurality of steps 100, a pair of handrails 101a, 101b, handrails 102a, 102b, and entrances 103a, 103b.

The plurality of steps 100 are connected in a ring shape. Each step 100 is a member that serves as a foothold when the user R of the escalator 1 gets on the escalator 1, and is supported by a truss (not shown) with a set inclination angle. A drive motor (not shown) rotates the sprockets 105a and 105b built in the upper and lower ends of the truss, whereby each of the steps 100 circulates as a stepped platform between the entrances 103a and 103b. That is, each step 100 moves while circulating between the entrance 103a and the entrance 103b. Each step 100 is formed of, for example, cast aluminum.

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

The handrails 101 a and 101 b are provided on both sides of the plurality of steps 100 in the width direction of the escalator 1 . The railing boards 101a and 101b are provided opposite to each other with a plurality of steps 100 interposed therebetween. The railing boards 101a and 101b are formed of, for example, transparent glass, acrylic, or the like.

The handrails 102a and 102b are members for the user R to grasp by hand. The handrail belts 102a and 102b are endless belts, and are movably wound around the respective peripheral edge portions of the handrail boards 101a and 101b. The handrails 102a, 102b are moved in synchronization with the movement of the respective steps 100 by means of drive motors. The handrails 102a and 102b are formed of, for example, rubber or the like.

The entrances and exits 103a and 103b are provided with entrance and exit plates 104a and 104b, respectively. The boarding and landing boards 104a and 104b are footholds when the user R gets on and off the escalator 1 . In addition, the riding boards 104a and 104b are provided so as to be detachable. The drive motor and the folded steps 100 and the like are accommodated below the landing boards 104a and 104b.

(Configuration example of step drive unit)

Next, the structure of the step driving part 200 which drives the step 100 is demonstrated using FIG. 2. FIG. FIG. 2 is a diagram showing a schematic configuration around the step 100 and the escalator diagnostic apparatus 10 according to the first embodiment.

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 boarding platform.

The step 100 is provided with the step driving unit 200 on the guide rail 300 . The step drive unit 200 includes step front wheels 220 , step rear wheels 230 , and step chains 240 .

The guide rails 300 are provided on a truss (not shown) so as to follow the inclination angle of the truss, and a pair is formed on both sides of the step 100 . The guide rail 300 includes a plate-shaped member and a pair of side walls standing on both sides in the transversal direction of the member. The plate-shaped member included in the guide rail 300 constitutes the main surface of the guide rail 300 . That is, the upper surface of the guide rail 300 (a surface with which the step front wheels 220 and the like, which will be described later, come into contact) and the lower surface are the main surfaces of the guide rail 300 .

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

The step chain 240 includes, for example, a pair of chains that connect two pairs of front step wheels 220 to each other, and a pair of chains that connect two pairs of front step wheels 220 and a pair of rear step wheels 230 . One pair of step chains 240 is connected to the axles of the two pairs of step front wheels 220, thereby connecting the two pairs of step front wheels 220 to each other. The other pair of step chains 240 is connected to the axles of the two pairs of step front wheels 220 and the one pair of step rear wheels 230 , thereby connecting the step front wheels 220 and the step rear wheels 230 .

In the step drive unit 200, the step chain 240 is fed by a drive motor (not shown). Thereby, the two pairs of step front wheels 220 and the one pair of step rear wheels 230 travel along the guide rails 300 , so that the steps 100 are raised and lowered along the inclination angle of the truss. In addition, the number and arrangement of the guide rails 300 , the step front wheels 220 , the step rear wheels 230 , and the step chains 240 can be variously changed, and are not limited to the structures described above.

A deformation detection unit 40 is provided on the upper surface of the guide rail 300 . The deformation detection unit 40 includes a plurality of deformation sensors 40 a that detect deformation of the guide rail 300 due to the passage of the step wheels. Specifically, the deformation sensor 40a is provided, for example, at two places on one guide rail 300, on the rail 220t on which the step front wheel 220 passes and on the rail 230t on which the step rear wheel 230 passes. That is, one pair of the strain sensors 40a is provided on each of the guide rails 300 on both sides of the step 100, and a total of two pairs are provided. The detailed structure 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 continued use of FIG. 2 .

In the escalator 1, in order to ensure high safety, maintenance and inspection are performed regularly. The maintenance and inspection are performed by manual or timed automatic operation or the like when there is no user R, such as before or after the facility in which the escalator 1 is installed, for example, when there is no user R. The escalator 1 is configured so that the state can be switched between an operation mode during normal operation and an inspection mode during maintenance inspection. At the time of maintenance and inspection, the escalator 1 is operated in the inspection mode, and the output signal from the deformation detection unit 40 is acquired in a state where there is no user R.

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 equipped is connected so that communication is possible 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 floppy disk, or an optical disk. The installation inspection mode data 31 is stored in the storage unit 30 . The inspection mode data 31 at the time of installation is data of an output signal obtained from the deformation detection unit 40 when 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 inspection mode data 31 at the time of installation is a reference value for an output signal at the time of maintenance and inspection to be described later.

The control unit 20 includes a microcomputer and a drive circuit. The microcomputer includes a CPU (Central Processing Unit) interconnected by a common bidirectional shared bus, a ROM (Read Only Memory) that stores a predetermined control program in advance, and a temporary memory. A RAM (Random Access Memory) for storing operation results of the CPU, a backup RAM, and an input/output port device. The control unit 20 functionally includes an input unit 21 , a signal processing unit 22 , and an external output unit 23 .

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

When the signal processing unit 22 acquires the output signal from the deformation detection unit 40 during maintenance and inspection, the signal processing unit 22 processes the output signal, and determines whether the output signal is abnormal or not. 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, and determines whether the output signal at the time of maintenance is abnormal. When the output signal at the time of maintenance and inspection is abnormal, it means that some kind of abnormality has occurred in the step driving part 200 of the escalator 1 .

As an example of abnormality detection, for example, there is a case in which lateral deviation occurs in any one or a plurality of wheels of the step front wheel 220 and the step rear wheel 230 that deviates from a predetermined track. In this case, the portion of the step front wheel 220 or the step rear wheel 230 that is in contact with the deformation detection unit 40 becomes a part. Therefore, even if the step front wheel 220 or the step rear wheel 230 passes through the deformation detection unit 40, the deformation amount of the deformation detection unit 40 is smaller than that in the normal case, and the output signal is also smaller. As another example of abnormality detection, for example, there is a case where any one or a plurality of wheels of the step front wheel 220 and the step rear wheel 230 are damaged. In this case, the output signal from the strain detection unit 40 becomes small or cannot be detected at all. When a defect such as a protrusion occurs in a damaged wheel, there is a possibility that the output signal suddenly increases.

That is, when a normal wheel passes over the deformation detection unit 40, the output signal of the deformation detection unit 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 constant intensity. When such a peak value deviates from the reference value by a predetermined threshold value or more, it is determined that the output signal at the time of maintenance is abnormal. The threshold value is calculated|required based on the specification value of the escalator 1, etc., for example. The signal processing unit 22 determines that some kind of abnormality has occurred in the step driving unit 200 of the escalator 1 when the output signal at the time of maintenance 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, notification or broadcast of an alarm to a person in charge of monitoring, a warning display to a monitoring center (not shown), mail transmission to a person in charge of maintenance, and the like.

(Configuration example of strain sensor)

Here, the detailed structure of the strain sensor 40a included in the strain detection unit 40 will be described with reference to FIG. 3 . FIG. 3 is a diagram showing a schematic configuration of the strain sensor 40 a according to the first embodiment.

As shown in FIG. 3 , the strain sensor 40a is a metal strain gauge, and includes: a gauge 40G extending in one direction while meandering in a zigzag shape; a base 40B supporting the gauge 40G; Wire 40L for the output signal. The length in the direction in which the measuring instrument 40G extends is referred to as the instrument length L, and the length in the direction orthogonal to the direction in which the instrument 40G extends is referred to as the instrument width W. The measuring instrument 40G deforms itself by being applied with a load or the like to generate a predetermined voltage according to the amount of deformation.

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 rail 300 . When the step front wheel 220 and the step rear wheel 230 respectively pass over the deformation sensor 40a, the deformation generated in the guide rail 300 is transmitted to the deformation sensor 40a, and a predetermined amount of deformation is detected as an output signal.

In addition, the strain sensor 40a may be, for example, a semiconductor body strain gauge or the like using a piezoelectric element.

In addition, the strain sensor 40a is provided on the upper surface of the guide rail 300, but may be provided on the lower surface. As a result, it is possible to suppress damage to the strain sensor 40a due to the stepped wheel or the like. In this way, the strain sensor 40a (the strain detector 40 ) may be provided on the main surface of the guide rail 300 , that is, on either the upper surface or the lower surface. However, the amount of deformation of the guide rail 300 due to step wheels and the like is large on the upper surface of the guide rail 300 . Therefore, when the strain sensor 40a is provided on the upper surface of the guide rail 300, the output signal becomes larger, and the finer strain can be detected.

(Example of escalator diagnostic processing)

Next, the diagnostic process of the escalator diagnostic apparatus 10 is demonstrated using FIG. 4. FIG. 4 is a flowchart showing an example of the procedure of the escalator diagnosis process according to the first embodiment.

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

In step S12, the input part 21 of the control part 20 acquires the output signal from the deformation|transformation detection part 40 which was detected at the time of the 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.

In step S14, if the deviation of the two output signals is smaller than the threshold value (NO), the process returns to step S12, and the following flow is repeated. In step S14, when the deviation of the two output signals is equal to or greater than the threshold value (Yes), in step S15, the external output unit 23 of the control unit 20 outputs the abnormality of the escalator 1 to the outside.

In conclusion, the diagnostic processing of the escalator diagnostic apparatus 10 is completed. When the abnormality of the escalator 1 is outputted to the outside, for example, the operator removes the landing boards 104a and 104b of the escalator 1, visually checks the state and operation state of each part, and performs necessary maintenance work.

In the conventional escalator, at the time of maintenance and inspection, the operator had to remove the landing board of the escalator, and visually check the state and operation state of each part. In order to ensure the safety of the escalator, maintenance and inspection are carried out on a daily basis, and the burden on the operator is large. In addition, the visual confirmation takes time, and the running time of the escalator is reduced.

According to the escalator diagnostic apparatus 10 of Embodiment 1, even if it confirms without removing the landing board 104a, 104b, the abnormality of the step front wheel 220 and the step rear wheel 230 inside the escalator 1 can be detected. Thereby, labor saving and time reduction of maintenance and inspection work can be achieved. Also, early abnormality detection can be performed.

In addition, in the above-mentioned description, the output signal from the deformation|transformation detection part 40 was acquired when the escalator 1 was installed, and it was set as a reference value for the output signal at the time of maintenance. 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, for example, based on the specification value, and this value may be used as the reference value. Alternatively, a stable value or an average value of output signals during maintenance and inspection may be used as a reference value. This also applies to the following various modifications.

(Variation 1)

Next, Modification 1 of Embodiment 1 will be described. The structure of the deformation|transformation detection part of the escalator diagnostic apparatus of the modification 1 differs from the escalator diagnostic apparatus 10 of Embodiment 1 in structure. Hereinafter, only differences from the escalator diagnostic apparatus 10 of the first embodiment will be described using FIG. 5 . 5 : is a figure which shows the schematic structure of the step 100 vicinity and the escalator diagnostic apparatus 10 which concern on the modification 1 of Embodiment 1. FIG.

As shown in FIG. 5 , the plurality of strain sensors 40 a included in the strain detection unit 41 according to Modification 1 are disposed at equal intervals, for example, in the vicinity of both ends of the guide rail 300 and a region sandwiched by both ends of the guide rail 300 . That is, the deformation sensors 40a are provided at a plurality of locations on the rail 220t through which the step front wheels 220 pass. In addition, the deformation sensors 40a are provided at a plurality of locations on the rail 230t through which the rear wheel 230 passes. In this way, in the escalator diagnostic apparatus 10 of Modification 1, the plurality of strain sensors 40a are arranged so as to be scattered over the entire area of the guide rail 300 .

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

(Variation 2)

Next, Modification 2 of Embodiment 1 will be described. The structure of the deformation|transformation detection part of the escalator diagnostic apparatus of the modification 2 differs from the escalator diagnostic apparatus 10 of Embodiment 1. FIG. Hereinafter, only differences from the escalator diagnostic apparatus 10 of the first embodiment will be described with reference to FIG. 6 . FIG. 6 is a diagram showing a schematic configuration of a step 100 and its vicinity and the escalator diagnostic apparatus 10 according to Modification 2 of Embodiment 1. FIG.

As shown in FIG. 6 , the plurality of strain sensors 42 a included in the strain detection unit 42 of the second modification have a gauge length that is longer than the strain sensor 40 a of the first embodiment. The gauge length of the strain sensor 42a is, for example, equal to or greater than the distance Ro traveled when the step front wheel 220 (or the step rear wheel 230) makes one rotation. However, it is not limited to the example of FIG. 6 , and a plurality of strain sensors 40 a of the first embodiment may be connected so that the overall measuring instrument length is equal to or longer than the distance Ro.

According to the escalator diagnostic apparatus 10 of the modification 2, since the gauge length of the strain sensor 42a is set to be equal to or more than the distance Ro traveled when the step front wheel 220 (or the step rear wheel 230) makes one rotation, it is possible to detect the step front wheel 220 (or the step rear wheel 230 ) is abnormal in the entire contact surface with the guide rail 300 . This makes it possible to detect an abnormality, for example, even when a part of the step front wheel 220 (or the step rear wheel 230 ) is broken. That is, the accuracy of abnormality detection is higher.

(Variation 3)

Next, Modification 3 of Embodiment 1 will be described. The escalator diagnostic apparatus of Modification 3 differs 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 Embodiment 1 will be described using FIGS. 7 to 9 . 7 : is a figure which shows the schematic structure of the reference|standard step 100s periphery and the escalator diagnostic apparatus 10 which concern on the modification 3 of Embodiment 1. FIG.

The position detection unit of Modification 3 can also be applied to the escalator diagnostic apparatus 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 modification 3, 100 s of reference steps provided with the reference step detection part 51 in the step support part 250 are provided. The escalator diagnostic apparatus 10 of Modification 3 specifies the position of the abnormal step 100 based on the detection signal of the reference step detection unit 51 and the pulse signal from the pulse generator 106 provided in the above-described sprocket 105a (see FIG. 1 ). The position information of the abnormal step 100 is stored in the storage unit 30 as abnormal step position information 50i, for example. The position detection unit and the deformation detection unit 40 including the reference step detection unit 51 and the pulse generator 106 are connected to the escalator diagnostic apparatus 10 of the third modification.

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

The reference step detection unit 51 , the reference point switch 51 a , and the switch support unit 51 b are housed under the reference step 100 s together with the reference step 100 s and the step front wheels 220 , the step rear wheels 230 , the guide rails 300 and the like of the plurality of steps 100 . Room 107.

The reference step detection portion 51 of the reference step 100 s 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 opened. The reference step detection unit 51 detects the passing of the reference step 100s by passing through the inner side of the U-shaped structure of the reference point switch 51a. One end of the switch support portion 51b is attached to the lower surface of the guide rail 300, and the reference point switch 51a is attached to the other end. Thereby, the switch support part 51b arranges the reference point switch 51a at the passing position of the reference step detection part 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 the direction orthogonal to the traveling direction of the reference step 100s.

Here, the passage of the reference step 100s is detected by the reference point switch 51a. 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, 100 counts. According to the position detection unit 50 , it is possible to know how far the reference step 100 s has advanced when the count value reaches 100 after the reference step 100 s has passed. That is, like the step 100 located above the strain sensor 40a when the strain sensor 40a detects an abnormality, for example, the fifth step 100 from the reference step 100s, the step 100 where the anomaly is detected can be specified. 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 an abnormality identified in this way is stored in the storage unit, for example. 30.

If an abnormality is detected at a predetermined step 100, maintenance and inspection are performed immediately. The maintenance and inspection in this case is a maintenance and inspection in which a worker intervenes. The escalator diagnostic apparatus 10 moves the step 100 in which the abnormality was detected to a predetermined inspection position based on the abnormal step position information 50i at the next maintenance inspection when a human is involved, that is, at the latest maintenance inspection after the abnormality is detected. The predetermined inspection position refers to, for example, a position directly below the getting-off plates 104a and 104b, or the like.

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

Next, the diagnostic process of the escalator diagnostic apparatus 10 of the modification 3 is demonstrated using FIG. 9. FIG. 9 is a flowchart showing an example of a procedure of an escalator diagnosis process according to Modification 3 of Embodiment 1. FIG. Here, the processing after the completion of steps S11 to S13 will be described.

In step S14 , if the deviation of the two output signals is equal to or greater than the threshold value (Yes), in step S31 , the position of the step 100 where the abnormality is detected is determined by collation with the position information detected by the position detection unit 50 . The positional information acquired by the input unit 21 is stored in the storage unit 30 as abnormal step positional information 50i.

In step S32, in the next maintenance and inspection, the escalator diagnostic apparatus 10 of the modification 3 reads out the stored position information. Based on the above-described position information, the escalator diagnostic apparatus 10 of Modification 3 moves the step 100 in which the abnormality occurred to a predetermined inspection position.

According to the escalator diagnostic apparatus 10 of the modified example 3, it is possible to easily specify a location where an abnormality has occurred. In addition, since the abnormality occurrence part is automatically moved to the predetermined inspection position, it is possible to reduce the maintenance and inspection time and suppress the omission of the abnormality part.

[Embodiment 2]

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

The escalator diagnostic apparatus 10 of the second embodiment can also be applied to the escalator diagnostic apparatus 10 of the above-described first embodiment and modifications 1 to 3. Hereinafter, an application example of the escalator diagnostic apparatus 10 according to the first embodiment will be described.

In step S41, the input unit 21 included in the control unit 20 of the escalator diagnostic apparatus 10 acquires the output signal from the deformation detection unit 40 detected at the time of installation of the escalator 1, and stores it as the inspection mode data 31 at the time of installation in storage unit 30 . In this setting inspection mode data 31, the output period of the output signal is also included as data. The output period of the output signal refers to the period between the peak of the output signal when the wheel of the predetermined step 100 passes the predetermined deformation sensor 40a and the peak of the output signal when the wheel of the subsequent step 100 passes the deformation sensor 40a. length. 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 to be described later.

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

In step S42, the input part 21 acquires the output signal from the deformation|transformation detection part 40 which was detected at the time of the maintenance and inspection of the escalator 1. The acquired data at the time of this maintenance and inspection also 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 (predetermined value) at the time of installation of the escalator 1 with the output cycle at the time of maintenance.

In step S44, if the deviation of two output signal cycles is smaller than the threshold value (NO), the process returns to step S42, and the following flow is repeated. In step S44, when the deviation of two output signal cycles is equal to or greater than the threshold value (Yes), the signal processing unit 22 determines that the output signal cycle at the time of maintenance is abnormal.

The escalator 1 normally runs at a constant speed. The interval at which the wheels of each step 100 pass over the predetermined deformation sensor 40a is also constant. When a deviation of the threshold value or more is found in the output signal cycle at the time of maintenance, the passing interval of each step 100 above the deformation sensor 40a is shifted (delayed). This means that elongation occurs in the step chain 240 due to deterioration or the like. The said threshold value is calculated|required based on the specification value of the escalator 1 etc., for example. The signal processing unit 22 determines that elongation has occurred in the step chain 240 when the cycle of the output signal at the time of maintenance is abnormal.

In step 45, the external output part 23 of the control part 20 outputs the abnormality of the escalator 1 to the outside. In conclusion, the diagnostic processing of the escalator diagnostic apparatus 10 is completed.

According to the escalator diagnostic apparatus 10 of Embodiment 2, even if it confirms without removing the board 104a, 104b, the elongation of the step chain 240 can be detected. Thereby, labor saving and time reduction of maintenance and inspection work can be achieved. Also, early abnormality detection can be realized.

[Embodiment 3]

Next, the escalator diagnostic apparatus of Embodiment 3 is demonstrated. The escalator diagnostic apparatus of the third embodiment is different from the escalator diagnostic apparatus 10 of the first embodiment in that it diagnoses deformation of the guide rail 300 . Hereinafter, referring to FIGS. 4 and 5 , only the points of difference from the escalator diagnostic apparatus 10 according to the first embodiment will be described.

As shown in FIG. 5 cited, the strain detection unit 41 according to Modification 1 of Embodiment 1 is applied to the escalator diagnostic apparatus 10 of Embodiment 3, for example. Moreover, it is preferable to use the data of the output signal when the escalator 1 of the same individual is installed as a reference value with respect to the output signal of the deformation|transformation detection part 41 at the time of maintenance and inspection. This is because initial deformation may occur even when the guide rail 300 is installed very rarely, and the amount of the initial deformation may vary among escalators 1 . In addition, since the deformation of the guide rail 300 is usually extremely small, it is required to have higher accuracy than the abnormality detection of the step drive unit 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 there is a deviation greater than or equal to a preset threshold value between the two. . The threshold value is calculated|required based on the specification value of the escalator 1, etc., for example.

Referring to FIG. 4 , the processing in the case where the escalator diagnostic apparatus 10 according to Embodiment 3 is used for maintenance after an earthquake occurs will be described.

In step S11 , the control unit 20 of the escalator diagnostic apparatus 10 stores the output signal from the deformation detection unit 40 at the time of installation of the escalator 1 in the storage unit 30 as the inspection mode data 31 at the time of installation.

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

In step S12 , the control unit 20 that has received the earthquake occurrence signal automatically starts maintenance, and the input unit 21 acquires the output signal from the deformation detection unit 40 .

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.

In step S14, if the deviation of the two output signals is smaller than the threshold value (NO), the process returns to step S12, and the following flow is repeated. In step S14, when the deviation of the two output signals is equal to or greater than the threshold value (Yes), in step S15, the external output unit 23 of the control unit 20 outputs the abnormality of the escalator 1 to the outside.

In conclusion, the diagnostic processing of the escalator diagnostic apparatus 10 is completed. The escalator 1 which detected the deformation|transformation of the guide rail 300 is set to a stop state until the repair work by an operator is complete|finished.

According to the escalator diagnostic apparatus 10 of the third embodiment, since the plurality of strain sensors 40a are provided on one rail 220t (or the rail 230t), for example, not only the step front wheel 220 (or the step rear wheel 230) can be easily detected. ) and the residual deformation of the guide rail 300 due to earthquakes and the like can be easily detected. Therefore, performing maintenance and inspection by the escalator diagnostic device 10 of the second embodiment after the occurrence of an earthquake as described above can be helpful in determining whether or not the escalator 1 can be restarted.

[Embodiment 4]

Next, the escalator diagnostic apparatus of Embodiment 4 is demonstrated. The escalator diagnostic apparatus of Embodiment 4 differs from the escalator diagnostic apparatus 10 of Embodiment 1 in that it determines the loading state of the escalator 1 . Hereinafter, only differences from the escalator diagnostic apparatus 10 of the first embodiment will be described with reference to FIGS. 11 and 12 . FIG. 11 is a diagram showing a schematic configuration around the step 100 and the escalator diagnostic apparatus 10 according to the fourth embodiment.

As shown in FIG. 11 , the escalator diagnostic apparatus 10 of Embodiment 4 is preferably applied to the strain detection unit 41 of Modification 1 of Embodiment 1, for example. In addition, the installation load data 32 is stored in the storage unit 30 of the escalator diagnostic apparatus 10 . The loading load data 32 at the time of installation is data of an output signal obtained from the deformation detection unit 40 when the escalator 1 is operated in the operation mode and a loading load is applied to the escalator 1 when the escalator 1 is installed. The state in which the loading load is applied can be formed by, for example, riding on a character imitating the user R. In this case, for example, it is preferable to obtain data by dividing into several levels such that there are one or more passengers on the escalator 1 , more than one passenger rides on the steps 100 at equal intervals, and the number of people riding 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 detection unit 41 also increases.

The input part 21 of the control part 20 acquires the output signal from the deformation|transformation detection part 40 at the time of the operation|movement of the escalator 1. The signal processing section 22 compares the sum of the above-mentioned 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 refers to the sum of all the deformation sensors 40 a included in the deformation detection unit 40 . Thereby, the signal processing part 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", "high load", and the like. At this time, when the sum total 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 by temporarily reducing the traveling speed of the escalator 1 , for example. The threshold value at this time can be set to, for example, the sum of the output signals in the vicinity of the maximum loading load among the data of the loading load data 32 at the time of installation.

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

In step S51 , the input unit 21 included in the control unit 20 of the escalator diagnostic apparatus 10 acquires the output signal from the deformation detection unit 40 in the loading load state at the time of installation of the escalator 1 as the loading load data 32 at the time of installation. stored in the storage unit 30 .

In step S52, the input part 21 acquires the output signal from the deformation|transformation detection part 40 at the time of the operation|movement 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 .

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

According to the escalator diagnostic device 10 of the fourth embodiment, it is possible to suppress the application of an overload to the escalator 1 . Moreover, the situation where the escalator 1 is stopped in order to protect the escalator 1 can be avoided.

As mentioned above, although some embodiment of this invention was described, the said embodiment is only shown as an example, Comprising: It does not intend to limit the scope of invention. The above-described new embodiment can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. The above-described embodiments and modifications thereof are also included in the scope and spirit of the invention, and are included in the invention described in the claims and the scope of equivalents thereof.

Claims (7)

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 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 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.

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