Hearing collector and passenger conveyor

Abstract

Provided is a sound collector and passenger conveyor that can more reliably collect abnormal sounds generated during operation of the passenger conveyor. The passenger conveyor includes a truss that defines an internal machine room of the passenger conveyor, a drive machine that drives the steps of the passenger conveyor, a floor panel that opens and closes an opening above the drive machine in the machine room, and a sound collector that is provided inside the machine room and collects sound, the truss supports a part of the floor panel at its upper surface above the drive machine and has a floor panel support beam with a through hole in its side surface extending downward from the upper surface, and the sound collector has a sound collector that detects surrounding sounds, a fixed portion that is fixed to the floor panel support beam at the through hole, and an extension portion that extends from the fixed portion toward the drive machine of the passenger conveyor and has the sound collector attached thereto.

Description

[Technical field]

[0001] The present disclosure relates to a passenger conveyor and a sound collector installed in its machine room. [Background technology]

[0002] Patent Document 1 discloses an abnormality diagnosis system for a passenger conveyor. In the abnormality diagnosis system, a fixed sound collecting device is provided inside a machine room. In the abnormality diagnosis system, an abnormality in the passenger conveyor can be diagnosed based on the sound collected by the fixed sound collecting device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2010-018417 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the abnormality diagnosis system described in Patent Document 1, the fixed sound collection device is provided at the end of the machine room, which may result in a risk of not being able to reliably collect abnormal sounds emitted from the driving machine or the like.

[0005] The present disclosure has been made to solve the above-mentioned problems. An object of the present disclosure is to provide a sound collector and a passenger conveyor that can more reliably collect abnormal sounds generated during operation of the passenger conveyor. [Means for solving the problem]

[0006] The sound collector according to the present disclosure is a device provided inside a machine room of a passenger conveyor, and includes a sound collector unit that detects surrounding sounds, a fixed unit that is fixed to a floor board support beam that supports a floor board that covers an upper portion of the machine room of the passenger conveyor, and an extension unit that extends from the fixed unit toward the driving machine of the passenger conveyor and to which the sound collector unit is attached. The fixed portion is fixed to a side portion of the floor board support beam that extends downward from an upper surface portion that supports the floor board, the extension portion extends upward in the horizontal direction from a connection point below the center of the fixed portion, and the upper end is located below the upper surface portion of the floor board support beam, and the sound collection portion is attached so as to be located above the connection point in the extension portion. . In addition, the sound collector of the present disclosure is a device provided inside the machine room of the passenger conveyor, and comprises a sound collection unit that detects surrounding sounds, a fixed unit fixed to a floor board support beam that supports the floor board that covers the upper part of the machine room of the passenger conveyor, and an extension unit extending from the fixed unit toward the driver of the passenger conveyor and to which the sound collection unit is attached, the sound collection unit including a microphone having an element for detecting sound, and a sound collection board to which the microphone is attached and which outputs the sound detected by the microphone as an electrical signal, the fixed unit being fixed to a side unit of the floor board support beam that extends downward from the upper surface unit that supports the floor board, the extension unit being a plate that extends upward in the horizontal direction from a connection point below the center of the fixed unit, and the microphone is attached to the surface of the extension unit facing the driver, facing the driver.

[0007] The passenger conveyor according to the present disclosure includes a truss that defines an internal machine room of the passenger conveyor, a driving machine that drives the steps of the passenger conveyor, a floor panel that closes an opening above the driving machine in the machine room in an openable and closable manner, and a sound collector that is provided inside the machine room and collects sound, the truss supports a part of the floor panel at its upper surface above the driving machine and has a floor panel support beam with a through hole in its side surface extending downward from the upper surface, and the sound collector has a sound collection section that detects surrounding sounds, a fixed section that is fixed to the floor panel support beam at the through hole, and an extension section that extends from the fixed section in the direction of the driving machine of the passenger conveyor and has the sound collection section attached. The extension part extends upward in the horizontal direction from a connection point below the center of the fixed part, and its upper end is located below the upper surface of the floor board support beam, and the sound collecting part is attached so as to be located above the connection point in the extension part. . Effect of the Invention

[0008] According to the present disclosure, the sound collector is fixed to the floor support beam by the fixing portion, so that abnormal sounds generated during operation of the passenger conveyor can be more reliably collected. [Brief description of the drawings]

[0009] [Figure 1] 1 is a schematic diagram of an escalator to which the inspection system in the first embodiment is applied. [Diagram 2] 4 is an example of an interface screen displayed in the inspection system in the first embodiment. [Diagram 3] FIG. 2 is a perspective view of a main part of a machine room to which a sound collector is fixed in the first embodiment. [Figure 4] FIG. 2 is a top view of a machine room to which a sound collector is fixed in the first embodiment. [Diagram 5] FIG. 2 is a transparent perspective view of the sound collector in the first embodiment. [Figure 6] FIG. 2 is a side view of the sound collector in the first embodiment in a fixed state. [Figure 7] FIG. 2 is a diagram showing the configuration of an inspection device and a sound collector in the first embodiment. [Figure 8] 1 is a functional block diagram of an inspection system in a first embodiment. [Figure 9]4 is a diagram showing an example of a transition of sound pressure of a sound recorded by the inspection system of the first embodiment. FIG. [Figure 10] 4 is a diagram showing an example of a transition of sound pressure of a sound recorded by the inspection system of the first embodiment. FIG. [Figure 11] 4 is a flowchart showing an overview of operations performed in the inspection system of the first embodiment. [Figure 12] 4 is a flowchart showing an overview of operations performed in the inspection system of the first embodiment. [Figure 13] 4 is a flowchart showing the operation of the inspection system in the first embodiment. [Figure 14] 2 is a hardware configuration diagram of the inspection device according to the first embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The embodiments for carrying out the present disclosure will be described with reference to the accompanying drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals. The duplicated description of the parts will be appropriately simplified or omitted.

[0011] Embodiment 1 Fig. 1 is a schematic diagram of an escalator to which the inspection system according to the embodiment 1 is applied. Fig. 2 is an example of an interface screen displayed by the inspection system according to the embodiment 1.

[0012] FIG. 1 shows an escalator 1, which is an example of a passenger conveyor. The escalator 1 is installed between an upper floor and a lower floor of a building (not shown). The escalator 1 transports passengers between the upper floor and the lower floor. The escalator 1 is provided with a first entrance 2a, a second entrance 2b, a truss 3, and a machine room 4.

[0013] The first entrance 2a is provided on an upper floor of the building. The second entrance 2b is provided on a lower floor of the building. Passengers use the escalator 1 by passing through the first entrance 2a and the second entrance 2b. The truss 3 is spanned between the first entrance 2a and the second entrance 2b. Although not shown in the figure, the truss 3 is composed of a number of beams combined together. The truss 3 has a machine room 4 at its upper end, below the first entrance 2a. The machine room 4 is a space surrounded by the beams of the truss 3, an outer frame not shown, and the like.

[0014] The escalator 1 includes a driving machine 5, a reduction gear 6, and a brake device 7 inside a machine room 4. The driving machine 5 is a motor that rotates a power shaft. The reduction gear 6 includes an input shaft 6a, a driving shaft 6b, and a reduction mechanism 6c. A V-belt 8 is wound around the power shaft and input shaft 6a of the driving machine 5. In the reduction gear 6, the rotational driving force of the driving machine 5 input to the input shaft 6a via the V-belt 8 is output from the driving shaft 6b. At this time, the rotational speed and torque of the input rotational driving force are converted in the reduction mechanism 6c that connects the input shaft 6a and the driving shaft 6b.

[0015] For example, the brake device 7 is connected to the drive shaft 6b. The brake device 7 can apply a braking force to the drive shaft 6b. For example, the brake device 7 applies a braking force by clamping a braked object such as a disk connected to the drive shaft 6b so as to follow it with a gripping body such as a brake pad. Hereinafter, the brake device 7 generating a braking force may be referred to as "operation," and the brake device 7 not applying a braking force by not clamping the braked object with a gripping body or the like may be referred to as "release."

[0016] The escalator 1 further includes a plurality of steps 9, a step sprocket 10, a drive chain 11, a step chain 12, and a control panel 13. The plurality of steps 9 are all connected together in an endless manner. The plurality of steps 9 are disposed between the first boarding / alighting entrance 2a and the second boarding / alighting entrance 2b. Although not shown, the steps 9 have a main rotation shaft. The main rotation shaft is guided by a guide rail disposed along the track of the steps 9. In this manner, the steps 9 are movable along the guide rail.

[0017] The step sprocket 10 is provided in the machine room 4. The drive chain 11 is endless. One end and the other end of the drive chain 11 are respectively wound around the drive shaft 6b and a driven sprocket (not shown) that is coaxially provided on the step sprocket 10. The step chain 12 is an endless chain. The step chain 12 connects a plurality of steps 9. A portion of the step chain 12 is wound around the step sprocket 10. In this state, a portion of the plurality of steps 9 and a portion of the step chain 12 are folded back from the top to the bottom of the step sprocket 10 along near the circumference of the step sprocket 10.

[0018] The control panel 13 is electrically connected to at least the driving machine 5 and the braking device 7. The control panel 13 may be connected to the driving machine 5 via an inverter (not shown). The control panel 13 controls the overall operation of the escalator 1 by transmitting control signals to the driving machine 5 and the braking device 7.

[0019] For example, the driving machine 5 is driven by a command from the control panel 13, and the brake device 7 is released. The rotational driving force generated by the driving machine 5 rotates the step sprocket 10 via the V-belt 8, the reduction gear 6, and the driving chain 11. The step chain 12 and the multiple steps 9 move following the rotation of the step sprocket 10. At this time, each of the multiple steps 9 moves along the guide rail. Specifically, among the multiple steps 9, the upper step 9 moves along the passenger transportation route. For example, in the case of UP operation, the upper step 9 turns back along the step sprocket 10 and moves downward as the lower step 9.

[0020] Inspection system 100 includes first server 101, second server 102, individual terminal 103, remote monitoring device 14, inspection device 20, and sound collector 30. Note that inspection system 100 may include escalator 1 as part of its configuration. Furthermore, at least one of remote monitoring device 14, inspection device 20, and sound collector 30 may be regarded as a component of the passenger conveyor that is escalator 1.

[0021] The first server 101 and the second server 102 are provided in a building separate from the building in which the escalator 1 is provided. The first server 101 and the second server 102 may be provided in separate buildings, or at least one of them may be realized as a cloud server. The first server 101 and the second server 102 are owned by a company that maintains and manages the escalator 1. For example, the first server 101 is a server that serves as an information center device and is accessed by a supervisor who remotely monitors the escalator 1. For example, the second server 102 is a server that is accessed from an individual terminal 103 by a worker who inspects, maintains, and so on the escalator 1 on-site.

[0022] The remote monitoring device 14 is electrically connected to the control panel 13 in the machine room 4. The remote monitoring device 14 is capable of communicating with the first server 101 and the second server 102 via a public line. The remote monitoring device 14 obtains information relating to the operation of the escalator 1 from the control panel 13, and transmits the information relating to the operation to the first server 101 when a specified condition is satisfied.

[0023] The inspection device 20 is electrically connected to the remote monitoring device 14 in the machine room 4. The inspection device 20 is capable of communicating with the first server 101 and the second server 102 via the remote monitoring device 14. The inspection device 20 is electrically connected to the control panel 13. The inspection device 20 may be electrically connected to the driving machine 5 and the braking device 7. The sound collector 30 is provided inside the machine room 4 as one of the inspection devices. The sound collector 30 includes a microphone capable of detecting surrounding sounds.

[0024] The inspection system 100 may include, as the inspection equipment, a camera provided on the escalator 1, a deflection sensor for the belt and the chain, etc. In this case, the inspection equipment is electrically connected to the inspection device 20.

[0025] The opening on the top of the machine room 4 is closed by a floor panel 15 in an openable and closable manner. Users move on the floor panel 15, which is the landing plate of the first entrance 2a. When inspecting the escalator 1, workers open the floor panel 15 and inspect the driving machine 5, etc. through the opening.

[0026] The inspection system 100 can replace part of the on-site inspection work performed by workers. Specifically, the inspection system 100 can replace the work of a worker inspecting the equipment of the escalator 1 by sound. Conventionally, when the floor board 15 covers the machine room 4 and the steps 9 are moving, a worker inspects the V-belt 8, the drive chain 11, the brake device 7, and the like for abnormalities by sounds heard from the machine room 4.

[0027] When the escalator 1 starts normal operation and when it stops normal operation, the inspection device 20 determines whether or not there is an abnormality based on the sound inside the machine room 4 collected by the sound collector 30. If an abnormality is confirmed, the inspection device 20 notifies the first server 101 of the abnormality via the remote monitoring device 14. Furthermore, the inspection device 20 stores the collected sound as recorded information, regardless of the presence or absence of an abnormality.

[0028] For example, instead of visiting escalator 1 for inspection work, a worker uses individual terminal 103 to listen to the sound stored in inspection device 20. At this time, individual terminal 103 accesses second server 102 to specify the timing and transmits an inquiry notice to inspection device 20. The inspection device 20 transmits to second server 102 sound information recorded at the timing included in the inquiry notice from among the recorded information stored therein. By accessing second server 102 from individual terminal 103, the worker can listen to the sound and determine whether or not there is an abnormality in the equipment in the same way as checking for abnormal sounds on-site.

[0029] 2 shows an example of an interface screen displayed on the individual terminal 103 by accessing the second server 102. By selecting button B1 on the interface screen, the worker can listen to the recorded sound at the specified timing. In the example shown here, the worker can also check in area B2 an image captured by a camera installed on the escalator 1.

[0030] Conventionally, inspection work by sound was performed once a month when a worker visited the escalator 1. The inspection device 20 can perform abnormality judgment by sound at the time of starting up every day, etc., so that the frequency of abnormality inspection can be increased compared to inspection work by a worker. In addition, the frequency of the worker's visit to the escalator 1 can be reduced. As for sounds that indicate a sign of an abnormality that cannot be detected by the inspection device 20, the worker can judge it by listening to the recorded information as in the conventional case. Furthermore, for example, by specifying an arbitrary day as a timing and acquiring the recorded information of that day, the worker can know when an abnormality such as an abnormal sound has been occurring. On the other hand, there is generally a limit to the amount of data that the remote monitoring device 14 can transmit and receive per certain period. In the inspection system 100, the recorded information is not transmitted or received until an inquiry is made to the inspection device 20, so that data can be effectively exchanged within the limit.

[0031] Next, the sound collector 30 will be described with reference to Figs. Fig. 3 is a perspective view of the main parts of the machine room to which the sound collector in embodiment 1 is fixed. Fig. 4 is a top view of the machine room to which the sound collector in embodiment 1 is fixed. Fig. 5 is a see-through perspective view of the sound collector in embodiment 1. Fig. 6 is a side view of the sound collector in embodiment 1 in a fixed state.

[0032] As shown in FIG. 3, the truss 3 includes a floor support beam 3a, an end beam 3b, and an end longitudinal beam 3c as part of the beams constituting the machine room 4. The floor support beam 3a is provided in the upper part of the machine room 4, at a position between the step sprocket 10 and the driving machine 5 on the horizontal projection plane. The floor support beam 3a has a longitudinal direction that faces horizontally and is approximately parallel to the drive shaft of the driving machine 5. The floor support beam 3a has an upper surface portion S1 facing upward and a side surface portion S2 that extends downward from the upper surface portion S1. The end beam 3b is a horizontal beam provided in the upper part of the machine room 4, at the end opposite the step sprocket 10 of the machine room 4. The end longitudinal beam 3c is connected to the end of the end beam 3b and is a beam whose longitudinal direction faces vertically. The floor panel 15, not shown in FIG. 3, is supported at least by the upper surface portion S1 of the floor support beam 3a.

[0033] Incidentally, while the end beam 3b is a beam that supports the floor panel and constitutes the end of the machine room 4, the floor panel support beam 3a is a beam that is placed mainly for the purpose of supporting the floor panel 15 on which the load is applied. Different models of escalator 1 have different shapes of the machine room 4, and therefore the distances from the end beam 3b and end vertical beam 3c to the driving machine 5 often differ. On the other hand, in order to ensure the ease of working on the driving machine 5 when the floor panel 15 is removed, the distance from the floor panel support beam 3a to the driving machine 5 does not vary significantly even if the model is different.

[0034] The sound collector 30 is fixed to the floor board support beam 3a. Specifically, it is fixed by a bolt or the like to the side of the side surface portion S2 of the floor board support beam 3a facing the driving machine 5. A through hole H through which the bolt is passed is formed in the side surface portion S2 of the floor board support beam 3a.

[0035] As shown in Fig. 4, on a horizontal projection plane, the sound collector 30 is located between the driver 5 and the folded-back portion of the step 9. On a horizontal projection plane, the sound collector 30 is located on the driver 5 side from the center in the width direction of the step 9. In other words, through hole H, which is not shown in Fig. 4, is opened on the driver 5 side from the center part in the longitudinal direction of the floor board support beam 3a.

[0036] 5, in this example, the sound collector 30 includes a sound collection unit 31 that detects sound, a fixture 32 that is fixed to the floorboard support beam 3a, and a mounting housing 33 that mounts the sound collection unit 31 to the fixture 32. The sound collection unit 31 includes a microphone 31a, which is an element that detects surrounding sound, and a sound collection substrate 31b. The sound collection substrate 31b outputs the sound detected by the microphone 31a as an electrical signal. The sound collection substrate 31b may have a function of converting the sound detected by the microphone 31a into recorded information.

[0037] In this example, the fixing jig 32 is a jig that is integrally formed by processing a single metal plate. The fixing jig 32 has a fixing part 34, an extension part 35, and an upper protective part 36 as its parts. Hereinafter, each component of the sound collector 30 will be described based on the posture in which the sound collector 30 is fixed to the floorboard support beam 3a.

[0038] The fixing portion 34 is a portion that is fixed to the floor plate support beam 3a. One or more fixing holes 34a are formed in the plate-shaped fixing portion 34. The fixing holes 34a are bellows holes that connect a small hole 34b and a large hole 34c. The large hole 34c is located vertically below the small hole 34b and has a larger diameter than the small hole 34b. The diameter of the small hole 34b is a diameter that allows a bolt that fixes the fixing portion 34 to the floor plate support beam 3a to pass through. The diameter of the large hole 34c is a diameter that allows a nut, washer, etc. that is fitted to the bolt that fixes the fixing portion 34 to the floor plate support beam 3a to pass through.

[0039] The extension portion 35 is plate-shaped and extends from a connection point 34d that is lower than the vertical center of the fixed portion 34. For example, the connection point 34d is the lower end of the fixed portion 34 that is fixed to the floor board support beam 3a. The extension portion 35 extends obliquely upward from the connection point 34d in the horizontal direction.

[0040] In addition, when the shape of the fixing jig 32 is such that a member extends from the fixing portion 34 in a horizontal direction or diagonally downward direction and its tip portion extends diagonally upward, the member extending in the horizontal direction or the member extending diagonally downward direction can be regarded as the fixing portion 34. Even in this case, the extending portion 35 is a portion extending from the fixing portion 34 in a diagonally upward direction with respect to the horizontal direction.

[0041] The upper protective part 36 is a part of the extending part 35 that extends from a part above the sound collection part 31 so as to cover the upper part of the sound collection part 31. For example, the upper protective part 36 is plate-shaped and extends from the upper end of the extending part 35 substantially perpendicular to the extending part 35.

[0042] The mounting housing 33 serves as a mounting portion 37 to mount the sound collection portion 31 to the extension portion 35. For example, the mounting housing 33 includes plates that form four of the six faces of a substantially cube. Specifically, the mounting housing 33 includes a mounting plate 38, a pair of side plates 39, and a lower plate 40.

[0043] The sound collection unit 31 is attached to the mounting plate 38. A hole for attaching the sound collection board 31b is formed in the mounting plate 38. A sound collection hole is formed in the mounting plate 38 at a position where the microphone 31a is disposed.

[0044] The pair of side plates 39 are plates facing each other and extend vertically from the mounting plate 38. A fixing plate 41 extends from each of the pair of side plates 39 at the end of the side plate 39 opposite the mounting plate 38. The fixing plate 41 extends in the opposite direction to the opposite side plate 39. The fixing plate 41 is fixed to the extension portion 35 with a bolt or the like while contacting the plate of the extension portion 35 at the contact surface. At this time, there is no gap between the fixing plate 41 and the extension portion 35. Also, the mounting plate 38 and the upper protective portion 36 are in contact with each other without any gap. The side plate 39 and the upper protective portion 36 are in contact with each other without any gap.

[0045] The lower plate 40 is a plate extending from the lower end of the mounting plate 38 in the same direction as the side plates 39. The lower plate 40 extends from the mounting plate 38 in the direction in which the sound collection unit 31 is attached, and exists below the sound collection unit 31. The lower plate 40 is connected to each of the pair of side plates 39. A wire inlet 40a is formed in the lower plate 40.

[0046] In the sound collector 30, a storage space A is formed, surrounded by a mounting plate 38, which is a mounting housing 33, a pair of side plates 39, a lower plate 40, an extension portion 35, and an upper protective portion 36. Inside the storage space A, a microphone 31a and a sound collection board 31b, which are the sound collector 31, are arranged. A fixed plate 41 extends from the side plate 39 to the opposite side to the storage space A. The inside and outside of the storage space A are connected by a hole opened at the position of the microphone 31a and an inlet 40a.

[0047] As shown in Fig. 6, when attached, the microphone 31a faces the actuator 5. Therefore, it is easy to collect sounds especially around the actuator 5. Since an omnidirectional microphone element is selected, the microphone 31a can detect sounds generated inside the machine room 4 regardless of the position. The upper end of the extension 35 is located below the upper surface S1 of the floor board support beam 3a. At this time, the upper protective portion 36 is located below the upper surface S1, so the placed floor board 15 and the sound collector 30 do not come into contact with each other.

[0048] 5 and attached as shown in Fig. 6, the risk of the sound collection unit 31 being damaged by rainwater is reduced, and workers can easily work in the machine room 4. Specifically, when rainwater falls near the floor board 15 of the escalator 1, and when the wet floor board 15 is removed, rainwater may enter the machine room 4 along the floor board support beams 3a, etc. The sound collector 30 is required to be configured so that the sound collection board 31b, etc. are not damaged by this rainwater.

[0049] The sound collecting substrate 31b is surrounded by the storage space A so that rainwater does not fall on it from the top and sides. Here, if the fixing plate 41 extends from the side plate 39 toward the storage space A, the hole for fixing the extension part 35 will be connected to the storage space A. In this case, there is a risk that rainwater will enter the storage space A from above through the hole in the fixing plate 41. On the other hand, as shown in this embodiment, the fixing plate 41 extends on the opposite side to the storage space A, so such a risk is avoided. In addition, holes that need to connect the storage space A to the outside, such as the holes corresponding to the inlet 40a and the microphone 31a, are opened in positions that face downward when the sound collector 30 is attached. The intrusion of rainwater may occur from above or the side, and from above to below due to water droplets. The upper part of the inlet 40a is covered by the plate of the extension part 35, and each hole faces downward, so that the intrusion of rainwater due to these factors can be prevented.

[0050] The extension part 35 extends obliquely upward from the lower part of the fixed part 34. The sound collection part 31 is located at a height above the connection part 34d. Rainwater running down the floorboard support beam 3a can move downward along the fixed part 34, but does not run above the connection part 34d due to gravity, but falls downward. Even if rainwater falls on the extension part 35, it runs down the extension part 35 to the connection part 34d and then falls downward. In the attached state, the upper protective part 36 has a plate that is inclined downward. Therefore, even if rainwater falls on the upper protective part 36, it protects the sound collection part 31 like a roof and the rainwater falls downward.

[0051] In addition, since the fixing hole 34a is opened above the connection point 34d and the extension portion 35 extends from the lower side of the fixing hole 34a, the worker can remove the sound collector 30 from the upper side of the sound collector 30 after opening the floor board 15 to perform work on the machine room 4. This improves the workability of the work compared to when the removal work is performed from the lower or side of the sound collector 30. The same applies to the work of attaching the sound collector 30.

[0052] Next, the inspection device 20 will be described in detail with reference to FIGS. Fig. 7 is a diagram showing the equipment configuration of the inspection device and sound collector in embodiment 1. Fig. 8 is a functional block diagram of the inspection system in embodiment 1. Figs. 9 and 10 are diagrams showing an example of the transition of sound pressure of sound recorded in the inspection system of embodiment 1. Figs. 11 and 12 are flow charts showing an overview of the operations performed in the inspection system of embodiment 1.

[0053] As shown in Fig. 7, the inspection device 20 is connected to the remote monitoring device 14 via a communication repeater. The inspection device 20 is connected to the sound collection board 31b of the sound collection unit 31. The inspection device 20 is connected to the control panel 13. In parallel with the signal line through which a control signal is output from the control panel 13 to the brake device 7, a line through which a similar signal is output is input to the inspection device 20. In this case, the control signal related to the brake is input to the inspection device 20 at almost the same time as it is input to the brake device 7.

[0054] The inspection device 20 may be connected in series between the control panel 13 and the braking device 7. In this case, a control signal related to the brakes is input from the control panel 13 to the braking device 7 through the inspection device 20.

[0055] As shown in FIG. 8, the inspection device 20 includes a memory unit 21, a communication unit 22, a signal receiving unit 23, a recording unit 24, a recording control unit 25, an abnormality detection unit 26, a data processing unit 27, and a threshold value creation unit 28 as functions.

[0056] The storage unit 21 stores information related to various inspection results including recorded information. The communication unit 22 communicates with the remote monitoring device 14. For example, in response to an inquiry notification from the second server 102, the communication unit 22 transmits the recorded information stored in the storage unit 21 to the second server 102. The signal receiving unit 23 receives a brake signal related to brake control output from the control panel 13.

[0057] The recording unit 24 records an electrical signal indicating the sound, which is a signal received from the sound collection board 31b. That is, the recording unit 24 records the sound detected by the sound collector 30. As a recording process, the recording unit 24 creates recording information indicating the sound and its time transition.

[0058] The recording control unit 25 controls the time when recording is started and ended by the recording unit 24. The recording control unit 25 causes the recording unit 24 to start recording when the signal receiving unit 23 receives a brake signal. When the signal receiving unit 23 receives a brake release signal, the recording control unit 25 causes the recording unit 24 to record for only the start interval. The start interval includes the start time from when the movement of the step 9 starts until it reaches a constant speed and the constant speed time required to detect an abnormality in the constant speed state. When the signal receiving unit 23 receives a brake actuation signal, the recording control unit 25 causes the recording unit 24 to record for only the stop interval. The stop interval is set to the time from when the stop operation of the step 9 starts until it stops during normal operation.

[0059] The abnormality detection unit 26 monitors the sound recorded by the recording unit 24 and detects an abnormality based on the sound. Specifically, the abnormality detection unit 26 detects an abnormality when the sound pressure of the recorded sound exceeds a specified first threshold or second threshold. The abnormality detection unit 26 changes the judgment threshold and the target value depending on whether the current timing is the startup time, the constant speed time, or the stop interval. Specifically, when monitoring an abnormality of a sound recorded during the startup time, the abnormality detection unit 26 detects an abnormality when the instantaneous value of the sound pressure of the recorded sound exceeds the first startup threshold or the second startup threshold. When monitoring an abnormality of a sound recorded during the constant speed time, the abnormality detection unit 26 detects an abnormality when the average value of the sound pressure of the recorded sound exceeds the first constant speed threshold or the second constant speed threshold. The abnormality detection unit 26 may use the time average value in a specified unit time as the average value of the sound pressure, or may use the time average value of the entire constant speed time. For example, the abnormality detection unit 26 may start monitoring for abnormalities in sounds recorded during the startup time, and then start monitoring for abnormalities in sounds recorded during the constant speed time after the startup time. When monitoring for abnormalities in sounds recorded during the stop interval, the abnormality detection unit 26 detects an abnormality when the instantaneous value of the sound pressure of the recorded sound exceeds the first stop threshold or the second stop threshold. The second startup threshold, the second constant speed threshold, and the second stop threshold are each preset as a specified upper limit value.

[0060] When an abnormality is detected, the abnormality detection unit 26 notifies the first server 101 of the detection of the abnormality via the remote monitoring device 14. When an abnormality is detected, the abnormality detection unit 26 may notify the second server 102 of the detection of the abnormality via the remote monitoring device 14.

[0061] When the recording is completed, the data processing unit 27 compresses the recording information of the recording to reduce the data volume, and stores the compressed information in the storage unit 21. At this time, the data processing unit 27 adds information indicating the recording timing, such as the current date and time, to the recording information. The information indicating the recording timing may include information indicating the brake signal that was the starting point of the recording.

[0062] The threshold creating unit 28 creates at least one of the first activation threshold, the first constant speed threshold, and the first stop threshold based on the sound pressure of the sound included in the recording information stored in the storage unit 21, and updates the thresholds. The threshold creating unit 28 creates a threshold from the recording information in the most recent reference period calculated from the current time. The reference period is set to an arbitrary period such as 10 days. For example, the threshold creating unit 28 creates a threshold once a day.

[0063] For example, when creating the first activation threshold, the threshold creation unit 28 calculates the average value of the sound pressure at each activation time for a plurality of pieces of recording information in the most recent reference period. The threshold creation unit 28 calculates the interquartile range of the average values ​​of the plurality of sound pressures. The interquartile range is a range that indicates the bottom 25% to 75% of the plurality of sound pressure values. The threshold creation unit 28 then creates a value that is 1.5 times the upper limit value of the interquartile range as the first activation threshold. The threshold creation unit 28 may create the first constant speed threshold and the first stop threshold by applying the same calculation as above to the constant speed time recording or the stop interval recording.

[0064] The start time and stop interval are calculated from the characteristics of the passenger conveyor when it starts and stops. At this time, the times are set so that recording is not performed longer than necessary in order to suppress the amount of communication when transmitting data to the second server 102. Specifically, the start time is set to within 2 seconds. The constant speed time is set to within 8 seconds. The stop interval is set to within 2 seconds.

[0065] FIG. 9 is a graph showing the time progression of the sound pressure of the sound recorded in the machine room 4 when the escalator 1 starts and goes into normal operation. The vertical axis is sound pressure [dB], and the horizontal axis is time [s (seconds)]. When starting up, step 9 is accelerated to a constant speed without exceeding a specified acceleration. For example, if the constant speed of step 9 is 40 [m / min], step 9 reaches the constant speed within 2 seconds after the brake device 7 is released.

[0066] 9, the sound pressure rises around 8 seconds when the brake device 7 is released. After that, the sound pressure remains roughly constant while the vehicle is accelerating in step 9 until around 9.5 seconds. After the vehicle reaches a constant speed in step 9, the sound pressure remains constant at a smaller average value than during acceleration.

[0067] For example, possible causes of abnormal noise during startup include damage to the bearings of the driving machine 5, abnormal meshing of the gears of the reduction gear 6, deterioration of the V-belt 8, poor meshing due to bending or stretching of the driving chain 11, etc. If such causes occur, a loud noise may occur at least momentarily during startup. In this case, the inspection device 20 and the operator can find the abnormality by comparing with the first startup threshold value or the second startup threshold value.

[0068] For example, possible causes of abnormal noise during constant speed operation include damage to the bearings of the driving machine 5, etc., abnormal meshing of the gears of the reduction gear 6, poor meshing due to bending or stretching of the driving chain 11, etc. If such causes occur, the sound generated during constant speed operation may steadily increase in accordance with the rotation period of the bearings, etc. If a recording of about 8 seconds is made, even if such causes occur, the inspection device 20 and the worker can find the abnormality by comparing it with the first constant speed threshold value or the second constant speed threshold value.

[0069] Also, for example, if there is an abnormality in the end of the guide rail that guides the step 9, an abnormal noise may occur every time the step 9 passes. In this case, the average value during the constant speed time may be larger than normal. As such, it is expected that abnormal noise will occur periodically during the constant speed time, resulting in an overall sound that is louder than normal, so it is effective to compare the average value of the recorded sound with the first constant speed threshold value or the second constant speed threshold value.

[0070] Fig. 10 is a graph showing the time transition of the sound pressure of the sound recorded in the machine room 4 when the escalator 1 stops from normal operation. The vertical axis is sound pressure [dB], and the horizontal axis is time [s (seconds)].

[0071] For example, possible causes of abnormal noise during stopping intervals include defective linings in the brake device 7, poor tension in the V-belt 8, etc. If such causes occur, squealing may occur from the affected part when stopping, resulting in at least a momentary loud noise.

[0072] In step 9, the vehicle is decelerated to a stop without exceeding the specified deceleration. For example, the normal deceleration is 0.75 [m / s 2 When the vehicle is decelerated at a constant speed of 0.55 [m / min], it takes about 0.9 seconds to stop from a constant speed (40 [m / min]). In FIG. 10, deceleration starts at about 27 seconds, and step 9 stops at about 28 seconds. For example, when the vehicle is decelerated at a slower deceleration rate of 0.55 [m / min] by a mechanical slow stop, 2 When the vehicle is decelerated at 40 [m / min], it takes about 1.2 seconds to stop from a constant speed (40 [m / min]). In this way, if the recording is made for about 2 seconds between stops, it is possible to detect abnormal noises when the vehicle stops.

[0073] Fig. 11 shows an overview of the operation of the escalator 1 when it is started and the operation of the inspection system 100 at that time. The flowchart in Fig. 11 starts when a caretaker who starts the escalator 1 turns on the start key of the escalator 1. For safety reasons, the caretaker usually turns on the start key after confirming that there are no people around the escalator 1. At the start of the flowchart, the brake device 7 is in operation.

[0074] In step S001, the control panel 13 transmits a command signal to the driving machine 5 to start and increase the torque. The driving machine 5 increases the torque based on the signal. At this time, the step 9 is stationary due to the braking force of the brake device 7.

[0075] Thereafter, in step S002, the control panel 13 determines whether or not a brake release condition is satisfied. For example, the release condition may be satisfied when a specified time has elapsed since a command signal to increase the torque is sent, or when the torque generated by the driving machine 5 exceeds a specified value. By setting the release condition, unexpected behavior of the brake device 7 due to its own weight after the brake device 7 is released is suppressed. The operation of step S002 is repeated until the release condition is satisfied in step S002.

[0076] In step S002, if the release condition is satisfied, the operation of step S003 is performed. In step S003, the control panel 13 transmits an open brake signal to the brake device 7 and the inspection device 20.

[0077] Then, in step S004, the signal receiving unit 23 of the inspection device 20 receives a brake release signal.

[0078] After that, in step S005, the recording control unit 25 causes the recording unit 24 to start recording. The recording unit 24 starts recording.

[0079] Thereafter, in step S006, the braking device 7 releases the brakes based on the release brake signal, and the braking force becomes zero.

[0080] After that, in step S007, the abnormality detection unit 26 monitors whether there is an abnormality in the recorded sound as monitoring the sound in the start interval. If the abnormality detection unit 26 detects an abnormality, it notifies the first server 101 of the abnormality. Also, in step S007, the abnormality detection unit 26 changes the criteria for judgment depending on the startup time and the constant speed time.

[0081] After that, in step S008, the recording control section 25 determines whether or not the start interval has elapsed. If the start interval has not elapsed in step S008, the operations from step S007 onwards are repeated.

[0082] If the start interval has elapsed in step S008, the operation of step S009 is performed. In step S009, the recording control unit 25 causes the recording unit 24 to end recording.

[0083] After that, in step S010, the data processing unit 27 stores the recorded information created by the recording unit 24 in the storage unit 21 after associating the information with the date and time and the timing of startup. Note that the information indicating that the recording was made by a brake release signal may be associated with the timing of startup.

[0084] Then, the operation of the flowchart ends.

[0085] Fig. 12 shows an overview of the operation of the escalator 1 when it stops from normal operation and the operation of the inspection system 100 at that time. The flowchart in Fig. 12 starts when a supervisor who performs the operation to stop the escalator 1 turns off the start key of the escalator 1. For safety reasons, the supervisor usually turns off the start key after confirming that there are no people around the escalator 1. At the start of the flowchart, the brake device 7 is released.

[0086] In step S101, the control panel 13 transmits an actuation brake signal to the braking device 7 and the inspection device 20.

[0087] Then, in step S102, the signal receiving unit 23 of the inspection device 20 receives an actuation brake signal.

[0088] After that, in step S103, the recording control unit 25 causes the recording unit 24 to start recording. The recording unit 24 starts recording.

[0089] Thereafter, in step S104, the braking device 7 operates the brakes based on the release brake signal to generate a braking force.

[0090] After that, in step S105, the abnormality detection unit 26 monitors the sound during the stop interval. If the abnormality detection unit 26 detects an abnormality, it notifies the first server 101 to that effect.

[0091] After that, in step S106, the recording control section 25 judges whether or not the stop interval has elapsed. If the stop interval has not elapsed in step S106, the operations from step S105 onwards are repeated.

[0092] If the stop interval has elapsed in step S106, the operation of step S107 is performed. In step S107, the recording control unit 25 causes the recording unit 24 to end recording.

[0093] After that, in step S108, the data processing unit 27 stores the recorded information created by the recording unit 24 in the storage unit 21 after associating the information with the date and time and the timing of the stop. Note that the information indicating that the recording was made by the actuation of the brake signal may be associated with the timing of the stop.

[0094] Then, the operation of the flowchart ends.

[0095] Next, an overview of the operation of the inspection system 100 when an operator checks the recording at a later date will be described with reference to FIG. FIG. 13 is a flowchart showing the operation of the inspection system in the first embodiment.

[0096] 13 starts, for example, when an operator creates a monthly report on escalator 1. The operator performs the creation work by accessing first server 101 and second server 102 using individual terminal 103.

[0097] In step S201, the worker checks whether or not an abnormality has been reported in the past month based on the information stored in the first server 101. If a report of an abnormality being detected has been received from the inspection device 20, the first server 101 stores the report. If there has been no report, the worker determines that no abnormality has been confirmed.

[0098] After that, in step S202, the second server 102 transmits an inquiry notification for transmitting the latest recording information to the inspection device 20. That is, the timing specified in the inquiry notification is the most recent date and time. Note that the second server 102 may transmit an inquiry notification specifying the most recent date and time as the timing to the inspection device 20 at any trigger other than step S202.

[0099] After that, in step S203, the communication unit 22 of the inspection device 20 transmits to the second server 102 the recorded information recorded at the timing designated in the inquiry notification.

[0100] Thereafter, in step S204, the worker operates the interface screen, listens to the transmitted recorded information, and determines whether or not there is an abnormality.

[0101] If the worker determines in step S205 that it is necessary to listen to the recorded information at another timing, the operation of step S206 is performed. In step S206, the second server 102 transmits an inquiry notification including the timing designated by the worker to the inspection device 20. Thereafter, the operations from step S203 onwards are repeated.

[0102] If the worker determines in step S205 that there is no need to listen to the recorded information at another time, the worker creates a report in step S207. After that, the operation of the flowchart ends.

[0103] According to the above-described first embodiment, the sound collector 30 includes the sound collector 31, the fixed portion 34, and the extension portion 35. The escalator 1 may include the sound collector 30. The fixed portion 34 is fixed to the floor support beam 3a. The inventor attached a sound pressure meter to each of the floor support beam 3a, the end beam 3b, and the end vertical beam 3c, and compared the measured sound pressure values. The result was that the sound pressure varies depending on the installation location. In light of the results of this comparative experiment, the measured values ​​may vary depending on the model of the passenger conveyor, since the distance from the driving machine 5 to the end beam 3b or the end vertical beam 3c varies depending on the model. On the other hand, for the convenience of maintenance, the floor support beam 3a is arranged near moving equipment such as the driving machine 5, even if the model is different. Since the fixed portion 34 is fixed to the floor support beam 3a, the sound collector 30 can more reliably collect abnormal sounds generated by the operation of the passenger conveyor.

[0104] In addition, the extension portion 35 extends horizontally upward from the connection point 34d on the lower side of the fixed portion 34. The sound collection portion 31 is located above the connection point 34d. Therefore, even if rainwater flows down from the floorboard support beam 3a and the fixed portion 34, the rainwater falls at the connection point 34d due to gravity. This prevents the rainwater from entering the sound collection portion 31 from that path. As a result, the soundness of the sound collector 30 can be improved when it is installed.

[0105] The sound collector 31 includes a microphone 31a and a sound collection substrate 31b. The sound collector 30 is required to detect abnormal sounds generated mainly from the driving machine 5, the reduction gear 6, the brake device 7, the V-belt 8, and the driving chain 11. The microphone 31a is attached facing the driving machine 5. Therefore, the microphone 31a can more reliably collect abnormal sounds.

[0106] Furthermore, the fixing portion 34 has a fixing hole 34a which is an arm-shaped hole. The sound collector 30 is attached to the floorboard support beam 3a, and therefore is removed so as not to get in the way of maintenance work in the machine room 4. Because the fixing hole 34a is an arm-shaped hole, the sound collector 30 can be removed via the large hole 34c, which makes the work easier, and can be firmly fixed by fixing with a bolt or the like via the small hole 34b.

[0107] Moreover, the sound collector 30 further includes an upper protective part 36. Therefore, even if rainwater falls from above, it can be prevented from hitting the sound collector 31.

[0108] Moreover, the fixed portion 34, the extension portion 35, and the upper protective portion 36 are integrally formed. Therefore, the sound collector 30 can be easily manufactured.

[0109] The sound collector 30 also includes an attachment section 37. The attachment housing 33, which is the attachment section 37, includes an attachment plate 38, a pair of side plates 39, and a lower plate 40. The sound collector 31 is disposed in a storage space A surrounded by the attachment section 37, the upper protective section 36, and the extension section 35. This can prevent the sound collector 31 from coming into contact with rainwater and breaking down. Furthermore, a wire inlet 40a is provided in the lower plate 40. The storage space A requires a hole through which a signal line that is a line drawn from the sound collection board 31b and transmits the sound collected by the sound collector 31 to the outside passes. In addition, the wire inlet 40a also passes through a power line that is supplied to the sound collection board 31b. The hole is provided in the lower plate 40 at the bottom of the storage space A, so that rainwater can be prevented from falling and coming into contact with the sound collector 31. As a result, the soundness of the sound collector 30 when installed can be improved.

[0110] Further, a fixing plate 41 is provided on each of the pair of side plates 39. The fixing plate 41 extends to the side opposite the storage space A and is fixed to the extension portion 35. Therefore, the structure for attaching the mounting portion 37 can prevent rainwater from entering the storage space A.

[0111] Furthermore, the sound collector 31 is located between the driver 5 and the folded-back portion of the step 9 on the horizontal projection plane. Therefore, the sound collector 30 can collect the sound of the driver 5 as well as the sound of the step 9 moving.

[0112] The inspection system 100 also includes an inspection device 20. The inspection device 20 includes a recording unit 24 and a recording control unit 25. The recording control unit 25 causes the recording unit 24 to record for a start interval after the escalator 1, which is a passenger conveyor, starts its start operation. The start interval includes the start time from when the brake device 7 starts its release operation until the step 9 reaches a constant speed. The start interval and the start time are times when normal operation is performed. That is, by having the above-mentioned functions, the inspection system 100 can collect sounds during normal operation. Also, the escalator 1 is started after it is confirmed that there are no passengers around who may cause disturbances. Therefore, the inspection system 100 and the inspection device 20 can easily collect sounds from the passenger conveyor in a situation with few disturbances.

[0113] Furthermore, the recording control unit 25 causes the recording unit 24 to record only for the stop interval after the escalator 1, which is the passenger conveyor, starts the stopping operation. The stop interval is the time during normal operation. In other words, by having the above-mentioned functions, the inspection system 100 can collect sounds during normal operation. Furthermore, the escalator 1 is stopped after it is confirmed that there are no passengers around that would cause disturbance. Therefore, the inspection system 100 and the inspection device 20 can easily collect sounds from the passenger conveyor in a situation with few disturbances.

[0114] The inspection device 20 further includes a signal receiving unit 23. The recording control unit 25 causes the recording unit 24 to start recording when the signal receiving unit 23 receives an open brake signal or an actuated brake signal. The sound to be collected by the inspection device 20 is the sound when a part of the device, such as the drive machine 5, is actually moving, such as rotating. If recording is started based on a signal that operates the drive machine 5 at startup, the sound when the device is actually moving cannot be obtained until the start-up condition is met. By starting recording when an open brake signal is received, the inspection device 20 can record with a reliable and necessary and sufficient timing. Furthermore, by starting recording when an actuated brake signal is received, the inspection device 20 can start recording immediately before the brake device 7 generates a braking force.

[0115] Furthermore, the start time is set to within 2 seconds. The constant speed time is set to within 8 seconds. The stop interval is set to within 2 seconds. These times are longer than the time for the target start or stop operation, but are not too long and necessary and sufficient to detect an abnormality. This makes it possible to save on storage capacity for saving recorded information and communication capacity for transmitting recorded information.

[0116] The inspection system 100 also includes a sound collector 30 and a server. The server includes at least one of a first server 101 and a second server 102. The inspection device 20 further includes a storage unit 21 and a communication unit 22. The server transmits an inquiry notification with a specified timing to the inspection device 20. When the inquiry notification is received, the inspection device 20 transmits recorded information at the specified timing to the server. Therefore, the inspection system 100 allows a worker in a remote location to listen to recorded information at any timing. As a result, the worker can perform inspection by sound without going to the site.

[0117] Moreover, the inspection device 20 further includes an abnormality detection unit 26. The abnormality detection unit 26 detects an abnormality and notifies the user when the sound pressure of the recorded sound exceeds a threshold value. For example, the notification is sent to a server. Therefore, when an abnormality is found, the inspection device 20 can notify the user of the abnormality to the outside. The company that maintains the passenger conveyor can immediately know the detected abnormality or a sign of an abnormality. As a result, a quick response can be made, and the maintenance accuracy of the passenger conveyor can be improved.

[0118] The inspection device 20 further includes a threshold value creation unit 28. The threshold value creation unit 28 creates a new threshold value from the recording information in the most recent reference period. Therefore, the inspection system 100 can flexibly respond to situations that gradually change over time so as to be able to detect abnormalities.

[0119] In addition, the fixing jig 32 does not have to be integrally molded as long as it has the functions of the fixing portion 34, the extending portion 35, and the upper protective portion 36.

[0120] The function of the recording unit 24 may be provided in the sound collection board 31b. In this case, the recording control unit 25 controls the timing at which the sound collection board 31b records sound.

[0121] The inspection system 100 of the first embodiment is also applicable to passenger conveyors other than escalators.

[0122] Next, an example of hardware constituting the inspection device 20 will be described with reference to FIG. FIG. 14 is a hardware configuration diagram of the inspection device according to the first embodiment.

[0123] Each function of the inspection device 20 may be realized by a processing circuit. For example, the processing circuit includes at least one processor 1000a and at least one memory 1000b. For example, the processing circuit includes at least one dedicated hardware 2000.

[0124] When the processing circuit includes at least one processor 1000a and at least one memory 1000b, each function of the inspection device 20 is realized by software, firmware, or a combination of software and firmware. At least one of the software and firmware is written as a program. At least one of the software and firmware is stored in the at least one memory 1000b. The at least one processor 1000a realizes each function of the inspection device 20 by reading and executing the program stored in the at least one memory 1000b. The at least one processor 1000a is also called a central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. For example, the at least one memory 1000b is a non-volatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, or an EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, or the like.

[0125] When the processing circuit includes at least one dedicated hardware 2000, the processing circuit is realized, for example, by a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. For example, each function of the inspection device 20 is realized by a processing circuit. For example, each function of the inspection device 20 is realized collectively by a processing circuit.

[0126] Some of the functions of the inspection device 20 may be realized by dedicated hardware 2000, and the remaining parts may be realized by software or firmware. For example, the function of the storage unit 21 may be realized by a processing circuit as the dedicated hardware 2000, and functions other than the function of the storage unit 21 may be realized by at least one processor 1000a reading and executing a program stored in at least one memory 1000b.

[0127] Thus, the processing circuitry implements each function of the inspection device 20 through hardware 2000, software, firmware, or a combination thereof.

[0128] Although not shown, the functions of the sound collection board 31b, the control panel 13, the first server 101, and the second server 102 may be realized by a processing circuit equivalent to the processing circuit that realizes each function of the inspection device 20. Furthermore, the functions of the first server 101 and the second server 102 may be provided in the second server 102 and the first server 101, respectively.

[0129] To summarize the above explanation, possible configurations of the technology according to the present disclosure include the configurations listed below as appendices. (Appendix 1) An apparatus installed inside a passenger conveyor machine room, A sound collection unit that detects surrounding sounds; A fixing portion fixed to a floor plate support beam that supports a floor plate that closes an upper portion of a machine room of the passenger conveyor; An extension portion extending from the fixed portion toward a driving machine of the passenger conveyor and to which the sound collecting portion is attached; A hearing aid equipped with a hearing aid. (Appendix 2) The fixing portion is fixed to a side portion of the floor board support beam that extends downward from an upper surface portion that supports the floor board, The extension portion extends upward in a horizontal direction from a connection point below the center of the fixed portion, The sound collection unit is attached to the extension unit so as to be located above the connection point. Attachment 1. A hearing aid as described in claim 1. (Appendix 3) The sound collection unit is A microphone having an element for detecting sound; a sound collection board to which the microphone is attached and which outputs a sound detected by the microphone as an electrical signal; Including, The microphone is mounted facing the driver. Attachment 2. A hearing aid as described in claim 2. (Appendix 4) The fixing portion is a hole formed above the connection portion, and is a fixing hole through which a bolt passed through the floor board support beam can pass, 4. The hearing aid according to claim 2 or 3, comprising: (Appendix 5) an upper protective portion extending from a portion of the extension portion above the sound collection portion so as to cover the upper portion of the sound collection portion; 5. The hearing aid according to claim 2, further comprising: (Appendix 6) The connection point is a lower end of the fixed portion fixed to the floor board support beam, The upper protective portion extends from an upper end of the extension portion, The fixing portion, the extension portion, and the upper protective portion are integrally molded. Attachment 5. A hearing aid as described in claim 5. (Appendix 7) an attachment portion for attaching the sound collection portion to the extension portion below the upper protective portion; Further comprising: The mounting portion is A mounting plate to which the sound collecting unit is attached; A pair of side plates extending from the mounting plate in a direction in which the sound collecting unit is attached, facing each other, and each fixed to the extension portion; a lower plate extending from the mounting plate below the sound collection unit in a direction in which the sound collection unit is attached and connected to each of the pair of side plates; having The sound collection unit is disposed in a storage space surrounded by the upper protective unit, the extension unit, the mounting plate, the pair of side plates, and the lower plate, The lower plate is provided with an inlet for passing a signal line drawn from the sound collecting unit. 7. A hearing aid as described in appendix 5 or appendix 6. (Appendix 8) Each of the pair of side plates has a fixing plate extending from an end opposite to the mounting plate toward the opposite side to the storage space, The fixing plate is fixed to the extension portion while being in contact with the extension portion. 7. A hearing aid as described in appendix 7. (Appendix 9) The sound collecting unit is located between the driving machine and a turning portion of the step of the passenger conveyor on a horizontal projection plane. A hearing aid according to any one of claims 1 to 8. (Appendix 10) A truss that configures a passenger conveyor machine room therein; A driving machine for driving the steps of the passenger conveyor; a floor plate that closes an opening above the driving machine in the machine room in an openable and closable manner; A sound collector provided inside the machine room for collecting sound; Equipped with the truss has a floor panel support beam that supports a part of the floor panel at an upper surface portion above the driving machine and has a through hole in a side portion extending downward from the upper surface portion, The sound collector is A sound collection unit that detects surrounding sounds; A fixing portion fixed to the floor board support beam in the through hole; an extension portion extending from the fixed portion toward the driving machine of the passenger conveyor and to which the sound collecting portion is attached; With Passenger conveyor. (Appendix 11) The through hole is provided on the side of the drive unit rather than the central portion of the floor board support beam. A passenger conveyor as described in Appendix 10. [Industrial Applicability]

[0130] As described above, the sound collector according to the present disclosure can be used to inspect escalators. [Explanation of symbols]

[0131] 1 escalator, 2a first entrance, 2b second entrance, 3 truss, 3a floor support beam, 3b end beam, 3c end vertical beam, 4 machine room, 5 drive machine, 6 reducer, 6a input shaft, 6b drive shaft, 6c reduction mechanism, 7 brake device, 8 V-belt, 10 step sprocket, 11 drive chain, 12 step chain, 13 control panel, 14 remote monitoring device, 15 floor, 20 inspection device, 21 memory unit, 22 communication unit, 23 signal receiving unit, 24 recording unit, 25 recording control unit, 25 lower, 26 abnormality detection unit, 27 data processing unit, 28 threshold creation unit, 30 sound collector, 31 sound collection unit, 31a microphone, 31b Sound collection board, 32 fixing jig, 33 mounting housing, 34 fixing portion, 34a fixing hole, 34b small hole, 34c large hole, 34d connection portion, 35 extension portion, 36 upper protective portion, 37 mounting portion, 38 mounting plate, 39 side plate, 40 lower plate, 40a line inlet, 41 fixing plate, 100 inspection system, 101 first server, 102 second server, 103 individual terminal, 1000a processor, 1000b memory, 2000 hardware, A storage space, B1 button, B2 area, H through hole, S1 upper surface portion, S2 side surface portion

Claims

1. An apparatus installed inside a passenger conveyor machine room, A sound collection unit that detects surrounding sounds; A fixing portion fixed to a floor plate support beam that supports a floor plate that closes an upper portion of a machine room of the passenger conveyor; An extension portion extending from the fixed portion toward a driving machine of the passenger conveyor and to which the sound collecting portion is attached; Equipped with The fixing portion is fixed to a side portion of the floor board support beam that extends downward from an upper surface portion that supports the floor board, The extension portion extends upward in the horizontal direction from a connection point below the center of the fixed portion, and an upper end is located below the upper surface portion of the floor board support beam, The sound collection unit is attached to the extension unit so as to be located above the connection point. Sound collector.

2. The fixed portion and the extension portion are integrally formed from a single plate. The sound collector according to claim 1.

3. The sound collection unit is A microphone having an element for detecting sound; a sound collection board to which the microphone is attached and which outputs a sound detected by the microphone as an electrical signal; Including, The microphone is mounted facing the driver. The sound collector according to claim 1.

4. The fixing portion is a hole formed above the connection portion, and is a fixing hole through which a bolt passed through the floor board support beam can pass. The sound collector according to claim 1, comprising:

5. An apparatus installed inside a machine room of a passenger conveyor, A sound collection unit that detects surrounding sounds; A fixing portion fixed to a floor plate support beam that supports a floor plate that closes an upper portion of a machine room of the passenger conveyor; An extension portion extending from the fixed portion toward a driving machine of the passenger conveyor and to which the sound collecting portion is attached; Equipped with The sound collection unit is A microphone having an element for detecting sound; a sound collection board to which the microphone is attached and which outputs a sound detected by the microphone as an electrical signal; Including, The fixing portion is fixed to a side portion of the floor board support beam that extends downward from an upper surface portion that supports the floor board, The extension portion is a plate extending upward in a horizontal direction from a connection point below the center of the fixed portion, The microphone is attached to a surface of the extension portion facing the driver, the surface facing the driver being opposed to the driver. Sound collector.

6. an upper protective portion extending from a portion of the extension portion above the sound collection portion so as to cover the upper portion of the sound collection portion; The sound collector according to any one of claims 1 to 5, further comprising:

7. The connection point is a lower end of the fixed portion fixed to the floor board support beam, The upper protective portion extends from an upper end of the extension portion, The fixing portion, the extension portion, and the upper protective portion are integrally molded. The sound collector according to claim 6.

8. an attachment portion for attaching the sound collection portion to the extension portion below the upper protective portion; Further comprising: The mounting portion is A mounting plate to which the sound collecting unit is attached; A pair of side plates extending from the mounting plate in a direction in which the sound collecting unit is attached, facing each other, and each fixed to the extension portion; a lower plate extending from the mounting plate below the sound collection unit in a direction in which the sound collection unit is attached and connected to each of the pair of side plates; having The sound collection unit is disposed in a storage space surrounded by the upper protective unit, the extension unit, the mounting plate, the pair of side plates, and the lower plate, The lower plate is provided with an inlet for passing a signal line drawn from the sound collecting unit. The sound collector according to claim 6.

9. Each of the pair of side plates has a fixing plate extending from an end opposite to the mounting plate toward the opposite side to the storage space, The fixing plate is fixed to the extension portion while being in contact with the extension portion. The sound collector according to claim 8.

10. The sound collecting unit is located between the driving machine and a turning portion of the step of the passenger conveyor on a horizontal projection plane. The sound collector according to claim 1 or 5.

11. A truss that configures a passenger conveyor machine room therein; A driving machine for driving the steps of the passenger conveyor; a floor plate that closes an opening above the driving machine in the machine room in an openable and closable manner; A sound collector provided inside the machine room for collecting sound; Equipped with the truss has a floor panel support beam that supports a part of the floor panel at an upper surface portion above the driving machine and has a through hole in a side portion extending downward from the upper surface portion, The sound collector is A sound collection unit that detects surrounding sounds; A fixing portion fixed to the floor board support beam in the through hole; an extension portion extending from the fixed portion toward the driving machine of the passenger conveyor and to which the sound collecting portion is attached; having The extension portion extends upward in the horizontal direction from a connection point below the center of the fixed portion, and an upper end is located below the upper surface portion of the floor board support beam, The sound collection unit is attached to the extension unit so as to be located above the connection point. Passenger conveyor.

12. The through hole is provided on the side of the drive unit rather than the central portion of the floor board support beam. A passenger conveyor as claimed in claim 11.