CN117985571A

CN117985571A - Abnormality detection device for passenger conveyor

Info

Publication number: CN117985571A
Application number: CN202310095163.1A
Authority: CN
Inventors: 野末纱海人
Original assignee: Mitsubishi Electric Building Solutions Corp
Current assignee: Mitsubishi Electric Building Solutions Corp
Priority date: 2022-11-01
Filing date: 2023-02-06
Publication date: 2024-05-07
Also published as: JP7268792B1; JP2024066203A

Abstract

An abnormality detection device for a passenger conveyor. A technique advantageous in distinguishing abnormal factors of a belt of a passenger conveyor and remotely judging proper maintenance and timing for performing the maintenance is provided. The passenger conveyor has: a driving rotator coupled to a driving motor for driving the plurality of steps; a driven rotating body coupled to the speed reducer; the annular transmission belt is wound on the driving rotating body and the driven rotating body; and an idler pulley that performs tension adjustment of the endless belt. The abnormality detection device of the passenger conveyor detects a first speed which is a traveling speed of the endless belt based on a rotational speed of the idler pulley, detects a second speed which is a traveling speed of the endless belt based on a traveling time of the endless belt, and calculates an elongation of the endless belt by comparing the first speed and the second speed.

Description

Abnormality detection device for passenger conveyor

Technical Field

The present invention relates to an abnormality detection device for a passenger conveyor.

Background

Conventionally, for example, patent document 1 discloses a technique related to an abnormality detection device of a passenger conveyor. The arithmetic device of this technique calculates the traveling speed of the drive pulley and the traveling speed of the power transmission belt, and compares these traveling speeds to determine the slip ratio of the power transmission belt.

Prior art literature

Patent document 1: japanese patent application laid-open No. 2004-99252

Disclosure of Invention

In the case where the traveling speed of the power transmission belt is delayed with respect to the traveling speed of the drive pulley, the delay factor includes the influence of elongation and wear of the transmission belt in addition to the influence of interlayer slip. Therefore, there is a problem that it is difficult to distinguish these factors and to judge the timing of performing appropriate maintenance.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a technique advantageous in that it is possible to distinguish abnormal factors of a belt of a passenger conveyor and to remotely determine appropriate maintenance and timing to perform the maintenance.

The present invention is an abnormality detection device for a passenger conveyor, wherein the passenger conveyor comprises: a plurality of steps connected in a ring shape and moving in a circulating manner; a drive motor that drives the plurality of steps; a driving rotator coupled to the driving motor; a speed reducer; a driven rotating body coupled to the speed reducer; the annular transmission belt is wound on the driving rotating body and the driven rotating body; and an idler pulley for adjusting tension of the endless belt, wherein the abnormality detection device of the passenger conveyor is configured to include: a first speed detecting unit that detects a first speed that is a running speed of the endless belt based on a rotational speed of the idler pulley; a second speed detecting unit that detects a second speed that is a traveling speed of the endless belt based on a traveling time of the endless belt; and an arithmetic unit for calculating a state quantity for determining whether or not the endless belt is abnormal, the arithmetic unit calculating an elongation of the endless belt by comparing the first speed and the second speed.

Effects of the invention

According to the abnormality detection device for a passenger conveyor of the present invention, it is possible to provide a technique advantageous in that appropriate maintenance and timing for performing the maintenance are remotely determined by distinguishing abnormal factors of a belt of the passenger conveyor.

Drawings

Fig. 1 is a cross-sectional view showing an example of an escalator to which an abnormality detection device is applied.

Fig. 2 is a diagram for explaining the structure of the driving unit.

Fig. 3 is a block diagram showing an example of the configuration of the abnormality detection device.

Fig. 4 is a functional block diagram showing functions realized by a processor of the control apparatus executing a program.

Fig. 5 is a flowchart showing a routine of the elongation calculation processing executed in the calculation unit.

Fig. 6 is a flowchart showing a routine of the first embodiment of the wear amount calculation process performed in the calculation section.

Fig. 7 is a flowchart showing a routine of a second embodiment of the wear amount calculation process performed in the calculation section.

Fig. 8 is a flowchart showing a routine of the first slip amount calculation process executed in the calculation section.

Fig. 9 is a flowchart showing a routine of the second slip amount calculation process executed in the calculation section.

Fig. 10 is a flowchart of a routine executed when the control device of the abnormality detection device monitors the elongation of the transmission belt.

Fig. 11 is a flowchart of a routine executed when the control device of the abnormality detection device monitors the wear amount of the transmission belt.

Fig. 12 is a flowchart of a routine executed when the control device of the abnormality detection device monitors the slip amount between the transmission belt and the drive pulley.

Fig. 13 is a flowchart of a routine executed when the control device of the abnormality detection device monitors the slip amount between the drive belt and the driven pulley.

Fig. 14 is a diagram showing a modification of the hardware resources of the control device.

Description of the reference numerals

1: Truss; 2: a step; 3: a lower stair opening; 4: a machine room; 5: a floor; 8: a sprocket; 9: a shaft; 10: a sprocket; 11: a sprocket; 12: a step chain; 13: a step shaft; 14: a handrail chain; 15: a driving device; 16: moving the armrest; 18: a sprocket; 20: a driving unit; 22: a drive motor; 24: a speed reducer; 26: a driving belt wheel; 28: a driven pulley; 30: a transmission belt; 32: an idler; 40: a control device; 42: a drive-side rotational speed sensor; 44: a driven side rotation speed sensor; 46: an idler rotation speed sensor; 48: a cruise speed sensor; 50: a first speed detecting unit; 52: a second speed detection unit; 54: a third speed detecting section; 56: a fourth speed detecting unit; 60: an arithmetic unit; 62: a determination unit; 64: a notification unit; 100: an abnormality detection device; 400: a processor; 410: a storage device; 420: dedicated hardware; 430: a processing circuit.

Detailed Description

Hereinafter, embodiments will be described with reference to the drawings. Elements common to the drawings are denoted by the same reference numerals, and repetitive description thereof will be omitted.

Embodiments are described.

1. Escalator structure using abnormality detection device

Fig. 1 is a cross-sectional view showing an example of an escalator to which an abnormality detection device is applied. An escalator is an example of a passenger conveyor to which an abnormality detection device is applied. The passenger conveyor includes a device such as a moving walk in addition to the escalator, but a description thereof is omitted here.

The escalator includes a truss 1 and steps 2. Truss 1 is erected on the upper floor and the lower floor. The passenger steps 2 move from a not-shown entrance to a lower entrance 3. That is, fig. 1 shows an ascending escalator. The escalator shown in fig. 1 may also be a descending escalator.

A machine room 4 is arranged below the lower landing entrance 3. The machine room 4 is a space formed inside the truss 1. The machine room 4 is closed by a floor 5. The floor 5 forms the floor of the landing gear 3. A drive unit 20 is provided in the machine room 4, which drive unit 20 is used for driving the sprocket 8. Details of the structure of the driving unit 20 will be described later.

On the shaft 9 provided with the sprocket 8, sprockets 10 and 11 are provided. The sprockets 10 and 11 rotate together with the sprocket 8. A step chain 12 is wound around the sprocket 10. The step chain 12 is provided with a plurality of step shafts 13. A step 2 is fixed to each step shaft 13. Thus, the plurality of steps 2 are annularly coupled to the step chain 12. The steps 2 are cyclically moved by being pulled by the step chain 12.

The handrail chain 14 is wound around and hung between the sprocket 11 and the sprocket 18. The handrail chain 14 transmits a driving force of a driving motor 22 described later to the driving device 15. The driving device 15 drives the moving handrail 16.

The step chain 12 and the handrail chain 14 are examples of chains used in an escalator. Other chains may also be used in an escalator. For example, the driving device 15 includes a chain for rotating a roller in contact with the moving handrail 16.

Fig. 2 is a diagram for explaining the structure of the driving unit. The drive unit 20 includes a drive motor 22, a speed reducer 24, a drive pulley 26 as a drive rotating body, a driven pulley 28 as a driven rotating body, a belt 30 as an endless belt, an idler pulley 32, and a control device 40 as main configurations. The drive motor 22 is coupled to a drive pulley 26. The speed reducer 24 is coupled to the driven pulley. A drive belt 30 is interposed between the drive pulley 26 and the driven pulley 28. Thereby, the power of the drive motor 22 is transmitted to the speed reducer 24 through the belt 30. The power input from the drive motor 22 to the speed reducer 24 is reduced in speed and then transmitted from the drive sprocket 6 at the other end to the sprocket 8 via the drive chain 7.

Idler 32 is a pulley as follows: the tension of the belt 30 is adjusted by pressing the belt 30 from the outer peripheral surface side.

The driving unit 20 is provided with various sensors for detecting the state quantity. The driving-side rotational speed sensor 42 is a sensor for detecting the rotational speed of the driving pulley 26. The driven-side rotational speed sensor 44 is a sensor for detecting the rotational speed of the driven pulley 28. The idler rotational speed sensor 46 is a sensor for detecting the rotational speed of the idler 32. The cruise speed sensor 48 is a sensor for detecting the rotational speed according to the cruise time of the belt 30. Signals detected by the various sensors are sent to the control device 40. The control device 40 performs various processes described later based on signals detected by various sensors.

2. Structural example of abnormality detection device 100

The belt 30 may undergo plastic elongation due to aging, friction loss due to wear, or the like. When such aging occurs in the belt 30, the inner circumference of the belt 30 becomes long, and thus the belt tension decreases, which may become a factor that causes an increase in slip or belt breakage. Therefore, the belt 30 needs to be periodically checked and belt tension adjusted or belt replaced as needed.

The abnormality detection device of the present embodiment is characterized in that the state of the belt 30 is monitored remotely and quantitatively. Hereinafter, the operation of the abnormality detection device will be described in detail, taking as an example a case of monitoring plastic elongation, wear and slip in the state of the belt 30 as an escalator.

Fig. 3 is a block diagram showing an example of the configuration of the abnormality detection device 100. The abnormality detection device 100 includes the drive-side rotational speed sensor 42, the driven-side rotational speed sensor 44, the idler rotational speed sensor 46, the cruise speed sensor 48, and the control device 40 described above.

The control device 40 has a function as a processing device of a computer. Typically, the control device 40 is provided with at least one processor 400 and at least one memory device 410. As the storage device 410, a volatile memory, a nonvolatile memory, and the like can be exemplified. At least one program executable by the processor 400 and various data associated with the at least one program are stored in the storage device 410. The processor 400 executes the program. The program may also be recorded in a computer-readable recording medium.

The various processes performed by the processor 400 are implemented by the processor 400 executing programs. Fig. 4 is a functional block diagram showing functions realized by a processor of the control apparatus executing a program. As shown in fig. 4, the processor 400 includes a first speed detecting unit 50, a second speed detecting unit 52, a third speed detecting unit 54, a fourth speed detecting unit 56, a calculating unit 60, a determining unit 62, and a notifying unit 64. Hereinafter, the function of the processor 400 will be described with reference to fig. 2, taking a case where the control device 40 monitors the state of the belt 30 of the escalator as an example.

2-1. First speed detecting portion 50

The first speed detecting unit 50 is a functional block for detecting the running speed V1 of the belt 30 based on the detection signal of the idler rotation speed sensor 46. The traveling speed V1 of the belt 30 is also referred to as "first speed V1" hereinafter. The first speed detecting unit 50 calculates the peripheral speed of the idler pulley 32 as a first speed V1. The first speed V1 is an actual speed that is not affected by elongation and wear of the transmission belt 30.

2-2. Second speed detecting portion 52

The second speed detecting portion 52 is a functional block for detecting the traveling speed V2 of the belt 30 based on the detection signal of the traveling speed sensor 48. Hereinafter, the traveling speed V2 of the belt 30 is also referred to as "second speed V2". The second speed detecting unit 52 calculates the second speed V2 from the travel time of the belt 30. Therefore, when the belt 30 is stretched, the second speed V2 is calculated to be slower than the actual speed.

2-3 Third speed detecting portion 54

The third speed detecting portion 54 is a functional block for detecting the nominal speed V3 of the transmission belt 30 from the detection signal of the drive-side rotational speed sensor 42. Hereinafter, the nominal speed V3 of the transmission belt 30 is also referred to as "third speed V3". The third speed detecting unit 54 calculates the circumferential speed of the drive pulley 26 as the third speed V3. Therefore, when slip occurs between the drive pulley 26 and the transmission belt 30, the third speed V3 becomes faster than the actual speed of the transmission belt 30. Further, when the belt 30 is worn, the inner circumference becomes longer than before the wear, and therefore, the third speed V3 becomes faster than the actual speed of the belt 30.

2-4 Fourth speed detecting portion 56

The fourth speed detecting portion 56 is a functional block for detecting the nominal speed V4 of the transmission belt 30 from the detection signal of the driven side rotational speed sensor 44. Hereinafter, the nominal speed V4 of the transmission belt 30 is also referred to as "fourth speed V4". The fourth speed detecting unit 56 calculates the circumferential speed of the driven pulley 28 as the fourth speed V4. Therefore, when slip occurs between the driven pulley 28 and the belt 30, the fourth speed V4 becomes slower than the actual speed of the belt 30. Further, when the belt 30 is worn, the inner circumference becomes longer than before the wear, and therefore, the third speed V3 becomes faster than the actual speed of the belt 30.

2-5 Arithmetic unit 60

The calculating unit 60 is a functional block for calculating a state quantity of the belt 30 based on the first speed V1, the second speed V2, the third speed V3, or the fourth speed V4. Examples of the state amounts of the belt 30 include an elongation L of the belt 30, an abrasion W, a slip S1 between the belt 30 and the drive pulley 26, and a slip S2 between the belt 30 and the driven pulley 28. The slip amounts S1 and S2 here show, for example, slip amounts per unit rotation angle of the pulley. The operation unit 60 performs an elongation amount operation process for calculating the elongation amount L of the belt 30. Or the arithmetic unit 60 executes the wear amount arithmetic processing for calculating the wear amount W of the belt 30. Or the arithmetic unit 60 executes a first slip amount arithmetic processing of calculating the slip amount S1 of the belt 30. Or the operation unit 60 performs a second slip amount operation process of calculating the slip amount S2 of the transmission belt 30. These processes performed by the arithmetic unit 60 will be described in detail below.

2-5-1 Elongation calculation

The computing unit 60 performs an elongation amount computing process of computing the elongation amount L of the belt 30 as a state amount of the belt 30. Fig. 5 is a flowchart showing a routine of the elongation calculation process executed by the calculation unit 60. In step S100 of the routine shown in fig. 5, the arithmetic unit 60 acquires the first speed V1 detected by the first speed detecting unit 50. In step S102, the computing unit 60 acquires the second speed V2 detected by the second speed detecting unit 52.

As described above, when the belt 30 is stretched, the second speed V2 becomes slower than the first speed V1, which is the actual speed. That is, the difference between the first speed V1 and the second speed V2 can be expressed as a function of the elongation L of the belt 30. In step S104, the arithmetic unit 60 calculates the elongation L by substituting the acquired first velocity V1 and second velocity V2 into a function.

2-5-2 Wear amount calculation processing

The calculating unit 60 performs an abrasion amount calculating process of calculating the abrasion amount W of the belt 30 as the state amount of the belt 30. Fig. 6 is a flowchart showing a routine of the first embodiment of the wear amount calculation process executed in the calculation section 60. In step S110 of the routine shown in fig. 6, the arithmetic unit 60 acquires the first speed V1 detected by the first speed detecting unit 50. In step S112, the computing unit 60 obtains the third speed V3 detected by the third speed detecting unit 54.

When the belt 30 wears, the inner circumference becomes longer than in the initial state, and therefore, the ratio of the inner circumference to the outer circumference of the belt 30 becomes large. Accordingly, the greater the wear of the transmission belt 30, the greater the relative speed difference of the third speed V3 with respect to the first speed V1. That is, assuming that the slip amount S1 between the belt 30 and the drive pulley 26 is a known value, the difference between the third speed V3 and the first speed V1 can be expressed as a function of the wear amount W of the belt 30. In step S114, the calculation unit 60 calculates the wear amount W by substituting the obtained first speed V1 and third speed V3 into a function, for example, with the slip amount S1 set to zero.

The value of the slip amount S1 used for calculating the wear amount W may be, for example, an operation value of a first slip amount calculation process described later, or may be another known value. When the slip amount S1 is assumed to be zero to calculate the wear amount W, the assumed maximum wear amount can be calculated, and therefore, it is possible to perform abnormality determination on the more serious safety side.

Fig. 7 is a flowchart showing a routine of a second embodiment of the wear amount calculation process performed in the calculation section 60. In step S120 of the routine shown in fig. 7, the arithmetic unit 60 acquires the first speed V1 detected by the first speed detecting unit 50. In step S122, the computing unit 60 obtains the fourth speed V4 detected by the fourth speed detecting unit 56.

The greater the wear of the belt 30, the greater the relative speed difference of the fourth speed V4 with respect to the first speed V1. That is, the difference between the fourth speed V4 and the first speed V1 can be expressed as a function of the wear amount W of the belt 30. In step S124, the arithmetic unit 60 calculates the wear amount W by substituting the obtained first speed V1 and fourth speed V4 into a function.

2-5-3 First slip amount arithmetic processing

The calculation unit 60 performs a first slip amount calculation process of calculating a slip amount S1 between the transmission belt 30 and the drive pulley 26 as a state amount of the transmission belt 30. Fig. 8 is a flowchart showing a routine of the first slip amount calculation process executed by the calculation unit 60. In step S130 of the routine shown in fig. 8, the arithmetic unit 60 acquires the first speed V1 detected by the first speed detecting unit 50. In step S132, the computing unit 60 obtains the third speed V3 detected by the third speed detecting unit 54.

When slip occurs between the transmission belt 30 and the drive pulley 26, the third speed V3 calculated from the circumferential speed of the drive pulley 26 becomes faster than the first speed V1, which is the actual speed. That is, assuming that the wear amount W of the belt 30 is a known value, the difference between the third speed V3 and the first speed V1 can be expressed as a function of the slip amount S1 of the belt 30. In step S134, the calculation unit 60 calculates the slip amount S1 by substituting the detected first speed V1 and third speed V3 into a function, for example, with the abrasion amount W of the belt 30 being zero.

The wear amount W used for calculating the slip amount S1 may be, for example, an actual measurement value or an operation value of the wear amount calculation process. When the slip amount S1 is calculated assuming that the wear amount W is zero, the assumed maximum slip amount can be calculated, and therefore, it is possible to perform abnormality determination on the more serious safety side.

2-5-4 Second slip amount calculation processing

The calculation unit 60 executes a second slip amount calculation process of calculating the slip amount S2 between the transmission belt 30 and the driven pulley 28 as the state amount of the transmission belt 30. Fig. 9 is a flowchart showing a routine of the second slip amount calculation process executed in the calculation unit 60. In step S140 of the routine shown in fig. 9, the arithmetic unit 60 acquires the first speed V1 detected by the first speed detecting unit 50. In step S142, the computing unit 60 obtains the fourth speed V4 detected by the fourth speed detecting unit 56.

When slip occurs between the transmission belt 30 and the driven pulley 28, the fourth speed V4 calculated from the peripheral speed of the driven pulley 28 becomes slower than the first speed V1, which is the actual speed. That is, assuming that the wear amount W of the belt 30 is a known value, the difference between the fourth speed V4 and the first speed V1 can be expressed as a function of the slip amount S2 of the belt 30. In step S144, the calculation unit 60 calculates the slip amount S2 by, for example, setting the wear amount W to zero and substituting the detected first speed V1 and fourth speed V4 into a function.

The wear amount W used for calculating the slip amount S2 may be, for example, an actual measurement value or an operation value of the wear amount calculation process. When the slip amount S2 is calculated assuming that the wear amount W is zero, the assumed maximum slip amount can be calculated, and therefore, it is possible to perform abnormality determination on the more serious safety side.

2-6. Determination section 62

Returning again to fig. 4, the determination unit 62 is a functional block for determining an abnormality of the belt 30 by comparing the state quantity of the belt 30 calculated by the calculation unit 60 with a state threshold value. In general, when the elongation L of the belt 30 is greater than the threshold L0, the determination unit 62 determines that an abnormality that should be replaced is occurring in the belt 30. When the elongation L of the belt 30 is also greater than the threshold value L1 (L1 > L0), the determination unit 62 determines that an abnormality that should be replaced is occurring in the belt 30.

Or, when the wear W of the belt 30 is greater than the threshold W0, the determination unit 62 determines that an abnormality in which the belt 30 should be replaced has occurred. When the wear W of the belt 30 is greater than the threshold W1 (W1 > W0), the determination unit 62 determines that an abnormality that should be replaced is occurring in the belt 30.

Or, when the slip amount S1 or the slip amount S2 of the belt 30 is larger than the threshold value S0, the determination unit 62 determines that an abnormality in which the belt 30 should be replaced has occurred. The determination result in the determination unit 62 is sent to the notification unit 64.

2-7 Notification portion 64

The notification unit 64 is a functional block for notifying the administrator of the abnormality information transmitted from the determination unit 62. The abnormality information includes, for example, whether the belt 30 is abnormal or not, and the content of the abnormality. The notification unit 64 notifies the administrator by outputting the abnormality information to the output device, for example. The output method is not limited. That is, the notification unit 64 may be configured to display the notification content on a display device as an output device, or may be configured to output the abnormality information by voice from a speaker as an output device. As the notification content, for example, a notification to adjust the tension of the belt 30, a notification to replace the belt 30, and the like can be illustrated.

3. Specific application example of monitoring control of belt by abnormality detection device

Next, the monitoring control of the belt 30 of the escalator by the abnormality detection device 100 will be described in detail with reference to the flowchart.

3-1 Monitoring and controlling the elongation of the Transmission Belt 30

Fig. 10 is a flowchart of a routine executed when the control device of the abnormality detection device monitors the elongation of the transmission belt 30. The routine shown in fig. 10 is executed by the control device 40 at the time of executing the monitoring control of the drive belt 30 of the escalator, for example.

In step S200 of the routine shown in fig. 10, the elongation calculation processing of the routine shown in fig. 5 is executed. In step S202, the determination unit 62 determines whether or not the elongation L of the belt 30 calculated in step S200 is greater than a threshold L0. The threshold L0 here is a threshold value of the elongation amount required for belt tension adjustment of the belt 30, and a predetermined value is used. As a result, if the determination is not satisfied, it is determined that the belt tension adjustment is not necessary, and the routine ends. On the other hand, when the determination is true, the process advances to step S204.

In step S204, the determination unit 62 determines whether or not the elongation L of the belt 30 calculated in step S200 is greater than the threshold L1. The threshold L1 is a threshold value of the elongation required for belt replacement of the transmission belt 30, and is a value larger than the threshold value L0. As a result, if the determination is not satisfied, it is determined that the belt tension adjustment is necessary, and the process advances to step S206. On the other hand, when the determination is established, it is determined that the replacement of the band is necessary, and the process advances to step S208.

In step S206, the notification unit 64 reports an abnormality of the belt 30 to the administrator, and outputs a notification content for prompting adjustment of the belt tension to the output device. In step S208, the notification unit 64 reports an abnormality of the belt 30 to the administrator, and outputs the notification content for prompting the replacement of the belt to the output device.

3-2 Monitoring and controlling the wear amount of the Transmission Belt 30

Fig. 11 is a flowchart of a routine executed when the control device of the abnormality detection device monitors the wear amount of the transmission belt 30. The routine shown in fig. 11 is executed by the control device 40 at the time of executing the monitoring control of the belt 30 of the escalator, for example.

In step S210 of the routine shown in fig. 11, the wear amount arithmetic processing of the routine shown in fig. 6 or 7 is executed. In step S212, the determination unit 62 determines whether or not the wear amount W of the belt 30 calculated in step S210 is greater than the threshold value W0. The threshold W0 is a threshold of the amount of wear required for belt tension adjustment of the belt 30, and a predetermined value is used. As a result, if the determination is not satisfied, it is determined that the belt tension adjustment is not necessary, and the routine ends. On the other hand, when the determination is true, the process advances to step S214.

In step S214, the determination unit 62 determines whether or not the wear amount W of the belt 30 calculated in step S210 is greater than the threshold value W1. The threshold W1 is a threshold of the amount of wear required for belt replacement of the transmission belt 30, and is a value greater than the threshold W0. As a result, if the determination is not satisfied, it is determined that the belt tension adjustment is necessary, and the process advances to step S216. On the other hand, when the determination is established, it is determined that the replacement of the band is necessary, and the process advances to step S218.

In step S216, the notification unit 64 reports an abnormality of the belt 30 to the administrator, and outputs a notification content prompting adjustment of the belt tension to the output device. In step S218, the notification unit 64 reports an abnormality of the belt 30 to the administrator, and outputs the notification content for prompting the replacement of the belt to the output device.

3-3 Monitoring control of slip amount of drive belt 30

Fig. 12 is a flowchart of a routine executed when the control device of the abnormality detection device monitors the slip amount between the transmission belt 30 and the drive pulley 26. The routine shown in fig. 12 is executed by the control device 40 at the time of executing the monitoring control of the belt 30 of the escalator, for example.

In step S220 of the routine shown in fig. 12, the first slip amount arithmetic processing of the routine shown in fig. 8 is executed. In step S222, the determination unit 62 determines whether or not the slip amount S1 of the belt 30 calculated in step S220 is greater than the threshold S0. The threshold S0 is a threshold of the slip amount required for belt tension adjustment of the belt 30, and a predetermined value is used. As a result, if the determination is not satisfied, it is determined that the belt tension adjustment is not necessary, and the routine ends. On the other hand, when the determination is true, the process advances to step S224.

In step S224, the notification unit 64 reports an abnormality of the belt 30 to the administrator, and outputs a notification content for prompting adjustment of the belt tension to the output device.

Fig. 13 is a flowchart of a routine executed when the control device of the abnormality detection device monitors the slip amount between the transmission belt 30 and the driven pulley 28. The routine shown in fig. 13 is executed by the control device 40 at the time of executing the monitoring control of the belt 30 of the escalator, for example.

In step S230 of the routine shown in fig. 13, the second slip amount arithmetic processing of the routine shown in fig. 9 is executed. In step S232, the determination unit 62 determines whether or not the slip amount S2 of the belt 30 calculated in step S230 is greater than the threshold S0. The threshold S0 is a threshold of the slip amount required for belt tension adjustment of the belt 30, and a predetermined value is used. The threshold S0 may be the same value as the threshold S0 of the slip amount S1, or may be a value set separately as the threshold of the slip amount S2. As a result, if the determination is not satisfied, it is determined that the belt tension adjustment is not necessary, and the routine ends. On the other hand, when the determination is established, the process advances to step S234.

In step S234, the notification unit 64 reports an abnormality of the belt 30 to the administrator, and outputs a notification content prompting adjustment of the belt tension to the output device.

By remotely quantitatively monitoring the state of the belt 30 according to the operation of the abnormality detection device 100 described above, it is possible to distinguish between abnormal factors of the belt 30 and determine appropriate maintenance and timing to perform the maintenance. This reduces the burden on the operator in the spot inspection operation, and enables early detection of an abnormality.

4. Modification examples

The abnormality detection device 100 according to the embodiment may be modified as described below.

4-1. Drive Unit 20

The drive unit 20 may also use a chain as endless belt instead of the belt 30. In this case, a driving sprocket as a driving rotator and a driven sprocket as a driven rotator may be used for the driving pulley 26 and the driven pulley 28, respectively.

4-2 Functional configuration of the control device 40

Some or all of the functions performed by the processor 400 of the control device 40 may be configured in a remote server, which is connected to the control device 40 via a communication network.

4-3 Hardware resources of control device 40

Fig. 14 is a diagram showing a modification of the hardware resources of the control device 40. In the example shown in fig. 14, the control device 40 includes, for example, a processing circuit 430 including a processor 400, a storage device 410, and dedicated hardware 420. Fig. 14 shows an example in which a part of functions of the control device 40 are realized by dedicated hardware 420. All functions of the control device 40 may be realized by dedicated hardware 420. As dedicated hardware 420, a single Circuit, a composite Circuit, a programmed processor, a parallel programmed processor, an ASIC (Application SPECIFIC INTEGRATED Circuit), an FPGA (Field Programmable GATE ARRAY field programmable gate array), or a combination thereof may be employed.

5. Others

The preferred embodiments and the like have been described in detail, but the present invention is not limited to the above embodiments and the like, and various modifications and substitutions can be made to the above embodiments and the like without departing from the scope of the claims.

Hereinafter, various aspects of the present invention will be described as a whole with additional notes.

(Additionally, 1)

An abnormality detection device for a passenger conveyor, wherein the passenger conveyor has: a plurality of steps connected in a ring shape and moving in a circulating manner; a driving motor that drives the plurality of steps; a driving rotator coupled to the driving motor; a speed reducer; a driven rotating body coupled to the speed reducer; an endless belt wound around the driving rotator and the driven rotator; and an idler pulley for adjusting the tension of the endless belt, wherein the abnormality detection device of the passenger conveyor is configured to include:

a first speed detecting unit that detects a first speed that is a running speed of the endless belt based on a rotational speed of the idler pulley;

A second speed detecting unit that detects a second speed that is a traveling speed of the endless belt based on a traveling time of the endless belt; and

An arithmetic unit that calculates a state quantity for determining whether or not the endless belt is abnormal,

The arithmetic unit calculates an elongation of the endless belt by comparing the first speed and the second speed.

(Additionally remembered 2)

The abnormality detection device for a passenger conveyor according to supplementary note 1, wherein,

The abnormality detection device for a passenger conveyor is further provided with a third speed detection unit that detects a third speed that is a nominal speed of the endless belt based on a rotational speed of the driving rotator,

The arithmetic unit calculates a slip amount between the endless belt and the driving rotator or a wear amount of the endless belt by comparing the first speed and the third speed.

(Additionally, the recording 3)

The abnormality detection device for a passenger conveyor is further provided with a fourth speed detection unit that detects a fourth speed that is a nominal speed of the endless belt based on a rotation speed of the driven rotation body,

The arithmetic unit detects a slip amount between the endless belt and the driven rotating body or a wear amount of the endless belt by comparing the first speed and the fourth speed.

(Additionally remembered 4)

The abnormality detection device for a passenger conveyor according to any one of supplementary notes 1 to 3, wherein,

The abnormality detection device for a passenger conveyor further includes a determination unit that determines whether or not the endless belt is abnormal by comparing the state quantity calculated by the calculation unit with a state threshold value.

(Additionally noted 5)

The abnormality detection device for a passenger conveyor according to supplementary note 4, wherein,

The abnormality detection device for a passenger conveyor further includes a notification unit that notifies the determined abnormality when the determination unit determines that the endless belt is abnormal.

(Additionally described 6)

The abnormality detection device for a passenger conveyor according to any one of supplementary notes 1 to 5, wherein,

The driving rotator is a driving pulley,

The driven rotating body is a driven belt wheel,

The endless drive belt is a drive belt.

(Additionally noted 7)

The driving rotator is a driving sprocket wheel,

The driven rotating body is a driven sprocket wheel,

The endless drive belt is a drive chain.

Claims

1. An abnormality detection device for a passenger conveyor, wherein the passenger conveyor has: a plurality of steps connected in a ring shape and moving circularly; a driving motor that drives the plurality of steps; a driving rotator coupled to the driving motor; a speed reducer; a driven rotating body coupled to the speed reducer; an endless belt wound around the driving rotator and the driven rotator; and an idler pulley for adjusting the tension of the endless belt, wherein the abnormality detection device of the passenger conveyor is configured to include:

2. The abnormality detection device for a passenger conveyor according to claim 1, wherein,

3. The abnormality detection device for a passenger conveyor according to claim 1, wherein,

4. The abnormality detection device for a passenger conveyor according to any one of claims 1 to 3, wherein,

5. The abnormality detection device for a passenger conveyor according to claim 4, wherein,

6. The abnormality detection device for a passenger conveyor according to any one of claims 1 to 3, wherein,