JP7268792B1 - Anomaly detector for passenger conveyor - Google Patents

Abstract

Kind Code: A1 To provide a technology that is advantageous in isolating the cause of an abnormality in a transmission belt of a passenger conveyor and remotely judging appropriate maintenance and its timing. A passenger conveyor includes a drive rotor connected to a drive motor for driving a plurality of steps, a driven rotor connected to a reduction gear, and a transmission wound around the drive rotor and the driven rotor. It has an endless belt and an idler for tension adjustment of the transmission endless belt. The abnormality detection device for the passenger conveyor detects a first speed, which is the running speed of the endless transmission belt, from the rotation speed of the idler, detects a second speed, which is the lap speed of the endless transmission belt, from the lap time of the endless transmission belt, By comparing the first speed and the second speed, the elongation amount of the transmission endless belt is calculated. [Selection drawing] Fig. 10

Description

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

Conventionally, for example, Patent Literature 1 discloses a technology related to an abnormality detection device for a passenger conveyor. The calculation device of this technique calculates the rotation speed of the driving pulley and the rotation speed of the power transmission belt, and determines the slip ratio of the power transmission belt by comparing these rotation speeds.

JP-A-2004-99252

When the circulating speed of the power transmission belt is delayed with respect to the circulating speed of the drive pulley, the delay factors include the effects of the elongation and wear of the transmission belt in addition to the effects of inter-layer slip. For this reason, there is a problem that it is difficult to separate these factors and determine appropriate maintenance and its timing.

The present disclosure has been made to solve the above-described problems, and provides an advantageous technique for isolating the cause of abnormality of the transmission belt of the passenger conveyor and remotely determining appropriate maintenance and its timing. for the purpose.

The present disclosure includes a plurality of steps that are endlessly connected and circulating, a driving motor that drives the plurality of steps, a driving rotating body that is connected to the driving motor, a speed reducer, and a driven motor that is connected to the speed reducer. An abnormality detection device for a passenger conveyor having a rotating body, an endless transmission belt wound around the driving rotating body and the driven rotating body, and an idler for adjusting the tension of the endless transmission belt, wherein the rotation speed of the idler a first speed detection unit for detecting a first speed that is the traveling speed of the endless transmission belt; a second speed detection unit for detecting a second speed that is the lap speed of the endless transmission belt from the lap time of the endless transmission belt; a computing unit that computes a state quantity for determining the presence or absence of an abnormality in the endless belt, wherein the computing unit computes the elongation amount of the transmission endless belt by comparing the first speed and the second speed. It consists of

According to the passenger conveyor abnormality detection device of the present disclosure, it is possible to provide an advantageous technique for isolating the cause of the abnormality of the transmission belt of the passenger conveyor and remotely judging appropriate maintenance and its timing.

1 is a cross-sectional view showing an example of an escalator to which an abnormality detection device is applied; FIG. It is a figure for demonstrating the structure of a drive unit. It is a block diagram which shows an example of a structure of an abnormality detection apparatus. 4 is a functional block diagram showing functions realized by executing a program by a processor of the control device; FIG. 4 is a flowchart showing a routine of elongation amount calculation processing executed in a calculation unit; 4 is a flow chart showing a routine of a first embodiment of wear amount calculation processing executed in a calculation unit; FIG. 7 is a flow chart showing a routine of a second embodiment of wear amount calculation processing executed in a calculation unit; FIG. 4 is a flow chart showing a routine of first slip amount calculation processing executed in a calculation unit; 4 is a flowchart showing a routine of second slip amount calculation processing executed in a calculation unit; 4 is a flow chart of a routine that is executed when the control device of the abnormality detection device monitors the amount of elongation of the transmission belt; 4 is a flow chart of a routine that is executed when the control device of the abnormality detection device monitors the amount of wear of the transmission belt; 4 is a flow chart of a routine executed when a control device of an abnormality detection device monitors the amount of slip between a transmission belt and a drive pulley; 4 is a flow chart of a routine executed when a control device of an abnormality detection device monitors the amount of slip between a transmission belt and a driven pulley; It is a figure which shows the modification of the hardware resources of a control apparatus.

Embodiments will be described below with reference to the drawings. In addition, the same code|symbol is attached|subjected to the element which is common in each figure, and the overlapping description is abbreviate|omitted.

Embodiment.
1. 1. Configuration of Escalator to which Abnormality Detection Device is Applied 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 anomaly detection devices are applied. Passenger conveyors include escalators and other devices such as walking paths, but the description thereof is omitted here.

The escalator comprises a truss 1 and steps 2. The truss 1 spans the upper and lower floors. Passengers ride on the steps 2 and move from an entrance (not shown) to an exit 3. That is, FIG. 1 shows an upward escalator. The escalator shown in FIG. 1 may be a downward escalator.

A machine room 4 is provided below the exit 3 . The machine room 4 is a space formed inside the truss 1 . The machine room 4 is closed with a floor board 5 . The floor plate 5 forms the floor of the exit 3. A drive unit 20 for driving the sprocket 8 is provided in the machine room 4 . The details of the configuration of the drive unit 20 will be described later.

Sprockets 10 and 11 are provided on a shaft 9 on which a sprocket 8 is provided. Sprockets 10 and 11 rotate with sprocket 8 . A step chain 12 is wound around the sprocket 10. - 特許庁A step chain 12 is provided with a plurality of step shafts 13 . A step 2 is fixed to each step shaft 13 . As a result, a plurality of steps 2 are endlessly connected to the step chain 12 . By being pulled by the step chain 12, the steps 2 circulate.

A handrail chain 14 is wound between the sprocket 11 and the sprocket 18. - 特許庁The handrail chain 14 transmits the driving force of a drive motor 22 (to be described later) to the drive device 15 . The driving device 15 drives the moving handrail 16 .

The step chain 12 and handrail chain 14 are examples of chains used on escalators. Other chains may be used in escalators. For example, the drive 15 is provided with a chain for rotating the rollers that contact the handrail 16 .

FIG. 2 is a diagram for explaining the configuration of the drive unit. The driving unit 20 includes a driving motor 22, a speed reducer 24, a driving pulley 26 as a driving rotating body, a driven pulley 28 as a driven rotating body, a transmission belt 30 as an endless transmission belt, An idler 32 and a controller 40 are provided. A drive pulley 26 is connected to the drive motor 22 . A driven pulley is connected to the reduction gear 24 . The transmission belt 30 is wound 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 via the transmission belt 30 . The power input from the drive motor 22 to the reduction gear 24 is decelerated and transmitted from the drive sprocket 6 at the other end to the sprocket 8 via the drive chain 7 .

The idler 32 is a pulley that adjusts the tension of the transmission belt 30 by pressing the transmission belt 30 from the outer peripheral surface side.

The drive unit 20 is provided with various sensors for detecting state quantities. The driving side rotation speed sensor 42 is a sensor for detecting the rotation speed of the drive pulley 26 . The driven side rotation speed sensor 44 is a sensor for detecting the rotation speed of the driven pulley 28 . The idler rotation speed sensor 46 is a sensor for detecting the rotation speed of the idler 32 . The rotation speed sensor 48 is a sensor for detecting the rotation speed from the rotation time of the transmission belt 30 . Signals detected by various sensors are sent to the control device 40 . The control device 40 executes various processes, which will be described later, based on signals detected by various sensors.

2. Configuration Example of Abnormality Detecting Device 100 The transmission belt 30 may undergo plastic elongation or wear due to wear due to deterioration over time. When such deterioration occurs in the transmission belt 30, the inner peripheral length of the transmission belt 30 is lengthened, and the belt tension is reduced, which may cause an increase in slip or belt breakage. Therefore, the transmission belt 30 needs to be periodically inspected and, if necessary, belt tension adjustment or belt replacement.

The abnormality detection device of this embodiment is characterized in that the state of the transmission belt 30 can be monitored quantitatively from a remote location. The operation of the abnormality detection device will be described in detail below, taking as an example the case of monitoring plastic elongation, wear, and slip as the states of the transmission belt 30 of an escalator.

FIG. 3 is a block diagram showing an example of the configuration of the abnormality detection device 100. As shown in FIG. The abnormality detection device 100 includes the drive-side rotation speed sensor 42, the driven-side rotation speed sensor 44, the idler rotation speed sensor 46, the lap speed sensor 48, and the control device 40 described above.

The control device 40 has the function of a processing device as a computer. Typically, controller 40 includes at least one processor 400 and at least one memory device 410 . A volatile memory, a nonvolatile memory, and the like are exemplified as the storage device 410 . Storage device 410 stores at least one program executable by processor 400 and various data associated therewith. The processor 400 executes programs. The program may be recorded on a computer-readable recording medium.

Various processes by the processor 400 are realized by the processor 400 executing the program. FIG. 4 is a functional block diagram showing functions realized by executing a program by the processor of the control device. As shown in FIG. 4, the processor 400 includes a first speed detection unit 50, a second speed detection unit 52, a third speed detection unit 54, a fourth speed detection unit 56, a calculation unit 60, a determination unit 62 and a notification unit 64 . Hereinafter, the functions of the processor 400 will be described with reference to FIG. 2, taking as an example the case where the control device 40 monitors the state of the transmission belt 30 of the escalator.

2-1. First speed detector 50
The first speed detection unit 50 is a functional block for detecting the running speed V1 of the transmission belt 30 based on the detection signal of the idler rotation speed sensor 46. As shown in FIG. The traveling speed V1 of the transmission belt 30 is hereinafter also referred to as "first speed V1". The first speed detector 50 calculates the peripheral speed of the idler 32 as the 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 detector 52
The second speed detection unit 52 is a functional block for detecting the rotation speed V2 of the transmission belt 30 based on the detection signal of the rotation speed sensor 48 . The rotation speed V2 of the transmission belt 30 is hereinafter also referred to as "second speed V2". A second speed detector 52 calculates a second speed V2 based on the rotation time of the transmission belt 30 . Therefore, when the transmission belt 30 stretches, the second speed V2 is calculated to be lower than the actual speed.

2-3. Third speed detector 54
The third speed detection unit 54 is a functional block for detecting the nominal speed V3 of the transmission belt 30 based on the detection signal of the driving side rotation speed sensor 42. As shown in FIG. The nominal speed V3 of the transmission belt 30 is hereinafter also referred to as "third speed V3". The third speed detector 54 calculates the circumferential speed of the drive pulley 26 as the third speed V3. Therefore, when a slip occurs between the drive pulley 26 and the transmission belt 30 , the third speed V3 becomes higher than the actual speed of the transmission belt 30 . Further, when the transmission belt 30 wears, the inner peripheral length becomes longer than before wear, so the third speed V3 becomes higher than the actual speed of the transmission belt 30 .

2-4. Fourth speed detector 56
The fourth speed detector 56 is a functional block for detecting the nominal speed V4 of the transmission belt 30 based on the detection signal of the driven side rotation speed sensor 44. As shown in FIG. The nominal speed V4 of the transmission belt 30 is hereinafter also referred to as "fourth speed V4". The fourth speed detector 56 calculates the peripheral speed of the driven pulley 28 as the fourth speed V4. Therefore, when a slip occurs between the driven pulley 28 and the transmission belt 30 , the fourth speed V4 becomes lower than the actual speed of the transmission belt 30 . Further, when the transmission belt 30 wears, the inner peripheral length becomes longer than before wear, so the third speed V3 becomes higher than the actual speed of the transmission belt 30 .

2-5. Arithmetic section 60
The calculation unit 60 is a functional block for calculating the state quantity of the transmission belt 30 based on the first speed V1, the second speed V2, the third speed V3, or the fourth speed V4. The state quantity of the transmission belt 30 here is exemplified by elongation amount L, wear amount W, slip amount S1 between the transmission belt 30 and the drive pulley 26, and slip amount S2 between the driven pulley 28. be. The slip amounts S1 and S2 here indicate, for example, slip amounts per unit rotation angle of the pulley. The calculation unit 60 executes an elongation amount calculation process for calculating an elongation amount L of the transmission belt 30 . Alternatively, the calculation unit 60 executes wear amount calculation processing for calculating the wear amount W of the transmission belt 30 . Alternatively, the calculation unit 60 executes a first slip amount calculation process for calculating the slip amount S1 of the transmission belt 30 . Alternatively, the calculation unit 60 executes a second slip amount calculation process for calculating the slip amount S2 of the transmission belt 30 . Each of these processes executed in the calculation unit 60 will be described in detail below.

2-5-1. Elongation Amount Calculation Process The calculation unit 60 executes an elongation amount calculation process for calculating an elongation amount L of the transmission belt 30 as a state quantity of the transmission belt 30 . FIG. 5 is a flow chart showing the routine of the elongation amount calculation process executed in the calculation section 60. As shown in FIG. At step S100 of the routine shown in FIG. 5, the calculation unit 60 acquires the first speed V1 detected by the first speed detection unit 50. FIG. At step S<b>102 , the calculation unit 60 acquires the second speed V<b>2 detected by the second speed detection unit 52 .

As described above, when the transmission belt 30 stretches, the second speed V2 becomes lower than the first speed V1, which is the actual speed. That is, the difference value between the first speed V1 and the second speed V2 can be expressed as a function of the stretch amount L of the transmission belt 30. FIG. In step S104, the calculation unit 60 calculates the elongation amount L by substituting the obtained first speed V1 and second speed V2 into a function.

2-5-2. Wear Amount Calculation Processing The calculation unit 60 executes wear amount calculation processing for calculating the wear amount W of the transmission belt 30 as the state quantity of the transmission belt 30 . FIG. 6 is a flow chart showing a routine of a first embodiment of wear amount calculation processing executed in the calculation unit 60. As shown in FIG. At step S110 of the routine shown in FIG. 6, the calculation unit 60 acquires the first speed V1 detected by the first speed detection unit 50. FIG. At step S<b>112 , the calculation unit 60 acquires the third speed V<b>3 detected by the third speed detection unit 54 .

When the transmission belt 30 wears, the inner peripheral length becomes longer than in the initial state, so the ratio of the inner peripheral length to the outer peripheral length of the transmission belt 30 increases. Therefore, as the wear of the transmission belt 30 increases, the relative speed difference between the third speed V3 and the first speed V1 increases. That is, the difference value between the third speed V3 and the first speed V1 can be expressed as a function of the wear amount W of the transmission belt 30, assuming that the slip amount S1 between the transmission belt 30 and the drive pulley 26 is a known value. can be done. In step S114, the calculation unit 60 calculates the wear amount W by, for example, setting the slip amount S1 to 0 and substituting the acquired first speed V1 and third speed V3 into a function.

The value of the slip amount S1 used in the calculation of the wear amount W may be, for example, the calculated value of the first slip amount calculation process, which will be described later, or another known value. If the wear amount W is calculated with the slip amount S1 set to 0, the assumed maximum wear amount is calculated, so that the abnormality can be judged on the safer side.

FIG. 7 is a flow chart showing a routine of a second embodiment of wear amount calculation processing executed in the calculation unit 60. As shown in FIG. At step S120 of the routine shown in FIG. 7, the calculation unit 60 acquires the first speed V1 detected by the first speed detection unit 50. FIG. At step S<b>122 , the calculation unit 60 acquires the fourth speed V<b>4 detected by the fourth speed detection unit 56 .

As the wear of the transmission belt 30 increases, the relative speed difference between the fourth speed V4 and the first speed V1 increases. In other words, the differential value between the fourth speed V4 and the first speed V1 can be expressed as a function of the wear amount W of the transmission belt 30 . In step S124, the calculation 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 Calculation Process The calculation unit 60 executes a first slip amount calculation process for calculating a slip amount S1 between the transmission belt 30 and the drive pulley 26 as a state quantity of the transmission belt 30 . FIG. 8 is a flow chart showing the routine of the first slip amount calculation process executed by the calculation section 60. As shown in FIG. At step S130 of the routine shown in FIG. 8, the calculation unit 60 acquires the first speed V1 detected by the first speed detection unit 50. FIG. At step S<b>132 , the calculation unit 60 acquires the third speed V<b>3 detected by the third speed detection unit 54 .

When a slip occurs between the transmission belt 30 and the drive pulley 26, the third speed V3 calculated from the peripheral speed of the drive pulley 26 becomes higher than the first speed V1, which is the actual speed. That is, the difference value between the third speed V3 and the first speed V1 can be expressed as a function of the slip amount S1 of the transmission belt 30, assuming that the wear amount W of the transmission belt 30 is a known value. In step S134, the calculation unit 60 calculates the slip amount S1 by setting the wear amount W of the transmission belt 30 to 0, for example, and substituting the detected first speed V1 and third speed V3 into a function.

The value of the wear amount W used in calculating the slip amount S1 may be, for example, an actually measured value or a calculated value obtained by the wear amount calculation process. If the wear amount W is assumed to be 0 and the slip amount S1 is calculated, the assumed maximum slip amount is calculated, so it is possible to make a safer abnormality determination.

2-5-4. Second Slip Amount Calculation Process The calculation unit 60 executes a second slip amount calculation process for calculating the slip amount S2 between the transmission belt 30 and the driven pulley 28 as the state quantity of the transmission belt 30 . FIG. 9 is a flow chart showing a routine of the second slip amount calculation process executed by the calculation section 60. As shown in FIG. At step S140 of the routine shown in FIG. 9, the calculation unit 60 acquires the first speed V1 detected by the first speed detection unit 50. FIG. At step S<b>142 , the calculation unit 60 acquires the fourth speed V<b>4 detected by the fourth speed detection unit 56 .

When a 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 lower than the first speed V1, which is the actual speed. That is, the difference value between the fourth speed V4 and the first speed V1 can be expressed as a function of the slip amount S2 of the transmission belt 30, assuming that the wear amount W of the transmission belt 30 is a known value. In step S144, the calculation unit 60 calculates the slip amount S2 by setting the wear amount W to 0, for example, and substituting the detected first speed V1 and fourth speed V4 into a function.

The value of the wear amount W used in calculating the slip amount S2 may be, for example, an actually measured value or a calculated value obtained by the wear amount calculation process. If the wear amount W is assumed to be 0 and the slip amount S2 is calculated, the assumed maximum slip amount is calculated, so it is possible to make a safer abnormality determination.

2-6. Determination unit 62
Returning to FIG. 4 again, the determination unit 62 is a functional block for determining abnormality of the transmission belt 30 by comparing the state quantity of the transmission belt 30 calculated by the calculation unit 60 with the state threshold value. Typically, the determination unit 62 determines that the transmission belt 30 has an abnormality requiring replacement when the elongation amount L of the transmission belt 30 is greater than the threshold value L0. Further, when the elongation amount L of the transmission belt 30 is larger than the threshold value L1 (L1>L0), the determination unit 62 determines that the transmission belt 30 has an abnormality requiring replacement.

Alternatively, when the wear amount W of the transmission belt 30 is greater than the threshold value W0, the determination unit 62 determines that the transmission belt 30 has an abnormality requiring replacement. Further, when the wear amount W of the transmission belt 30 is greater than the threshold value W1 (W1>W0), the determination unit 62 determines that the transmission belt 30 has an abnormality requiring replacement.

Alternatively, when the slip amount S1 or the slip amount S2 of the transmission belt 30 is larger than the threshold value S0, the determination unit 62 determines that the transmission belt 30 has an abnormality requiring replacement. The determination result of the determination unit 62 is sent to the notification unit 64.

2-7. Notification unit 64
The notification unit 64 is a functional block for notifying the administrator of the abnormality information sent from the determination unit 62 . The abnormality information includes, for example, whether or not there is an abnormality in the transmission belt 30, or details of the abnormality. The notification unit 64 notifies the administrator, for example, by outputting abnormality information to an output device. There is no limitation on the output form. That is, the notification unit 64 may display the content of the notification on a display device as an output device, or may output abnormality information by voice from a speaker as an output device. The content of the notification includes, for example, a call to adjust the tension of the transmission belt 30, a call to replace the transmission belt 30, and the like.

3. Specific Operational Example of Monitoring Control of Transmission Belt by Abnormality Detection Device Next, monitoring control of the transmission belt 30 of the escalator by the abnormality detection device 100 will be described in detail with reference to a flowchart.

3-1. Monitoring Control of Elongation Amount of Transmission Belt 30 FIG. 10 is a flow chart of a routine executed when the controller of the abnormality detection device monitors the elongation amount of the transmission belt 30 . The routine shown in FIG. 10 is executed by the control device 40 at the timing of execution of monitoring control of the transmission belt 30 of the escalator, for example.

At step S200 of the routine shown in FIG. 10, the elongation amount calculation process of the routine shown in FIG. 5 is executed. In step S202, the determination unit 62 determines whether the elongation amount L of the transmission belt 30 calculated in step S200 is greater than the threshold value L0. The threshold value L0 here is a threshold value of the amount of elongation of the transmission belt 30 that requires belt tension adjustment, and a preset value is used. As a result, if the determination is not established, it is determined that belt tension adjustment is not necessary, and this routine ends. On the other hand, if the determination is accepted, the process proceeds to step S204.

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

In step S206, the notification unit 64 notifies the administrator of the abnormality of the transmission belt 30, and outputs to the output device the content of the notification prompting adjustment of the belt tension. In step S208, the notification unit 64 notifies the administrator of the abnormality of the transmission belt 30 and outputs to the output device the content of the notification urging replacement of the belt.

3-2. Monitoring Control of Amount of Wear of Transmission Belt 30 FIG. 11 is a flow chart of a routine executed when the controller of the abnormality detection device monitors the amount of wear of the transmission belt 30 . The routine shown in FIG. 11 is executed by the control device 40 at the timing of execution of monitoring control of the transmission belt 30 of the escalator, for example.

At step S210 of the routine shown in FIG. 11, the wear amount calculation process 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 transmission belt 30 calculated in step S210 is greater than the threshold value W0. The threshold value W0 here is a threshold value of the amount of wear that requires adjustment of the belt tension of the transmission belt 30, and a preset value is used. As a result, if the determination is not established, it is determined that belt tension adjustment is not necessary, and this routine ends. On the other hand, if the determination is accepted, the process proceeds to step S214.

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

In step S216, the notification unit 64 notifies the administrator of the abnormality of the transmission belt 30, and outputs to the output device the contents of the notification that urges adjustment of the belt tension. In step S218, the notification unit 64 notifies the administrator of the abnormality of the transmission belt 30 and outputs to the output device the content of the notification urging replacement of the belt.

3-3. Monitoring Control of Slip Amount of Transmission Belt 30 FIG. 12 is a flow chart of a routine executed when the controller 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 timing of execution of monitoring control of the transmission belt 30 of the escalator, for example.

At step S220 of the routine shown in FIG. 12, the first slip amount calculation process of the routine shown in FIG. 8 is executed. At step S222, the determination unit 62 determines whether or not the slip amount S1 of the transmission belt 30 calculated at step S220 is greater than the threshold value S0. The threshold value S0 here is a threshold value of the amount of slip required to adjust the belt tension of the transmission belt 30, and a preset value is used. As a result, if the determination is not established, it is determined that belt tension adjustment is not necessary, and this routine ends. On the other hand, if the determination is accepted, the process proceeds to step S224.

In step S224, the notification unit 64 notifies the administrator of the abnormality of the transmission belt 30, and outputs to the output device the contents of the notification that urges adjustment of the belt tension.

FIG. 13 is a flow chart of a routine executed when the control device of the abnormality detection device monitors the amount of slip 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 timing of execution of monitoring control of the transmission belt 30 of the escalator, for example.

At step S230 of the routine shown in FIG. 13, the second slip amount calculation process of the routine shown in FIG. 9 is executed. At step S232, the determination unit 62 determines whether or not the slip amount S2 of the transmission belt 30 calculated at step S230 is greater than the threshold value S0. The threshold value S0 here is a threshold value of the amount of slip required to adjust the belt tension of the transmission belt 30, and a preset value is used. The threshold value S0 may be the same value as the threshold value S0 of the slip amount S1, or may be a value separately set as the threshold value of the slip amount S2. As a result, if the determination is not established, it is determined that belt tension adjustment is not necessary, and this routine ends. On the other hand, if the determination is accepted, the process proceeds to step S234.

In step S234, the notification unit 64 notifies the administrator of the abnormality of the transmission belt 30, and outputs to the output device the contents of the notification that urges adjustment of the belt tension.

According to the operation of the abnormality detection device 100 as described above, by quantitatively monitoring the state of the transmission belt 30 remotely, it is possible to isolate the cause of the abnormality of the transmission belt 30 and determine appropriate maintenance and its timing. . As a result, it is possible to reduce the burden of the inspection work on the operator and to discover an abnormality at an early stage.

4. Modifications The abnormality detection device 100 of the embodiment may be modified as follows.

4-1. drive unit 20
The drive unit 20 may use a chain as an endless transmission belt instead of the transmission belt 30 . In this case, the driving pulley 26 and the driven pulley 28 may use a driving sprocket as a driving rotating body and a driven sprocket as a driven rotating body, respectively.

4-2. Functional Arrangement of Controller 40 Some or all of the functions performed by processor 400 of controller 40 may be located on a remote server that is connected to controller 40 via a communications 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, controller 40 comprises processing circuitry 430 including, for example, processor 400 , storage 410 , and dedicated hardware 420 . FIG. 14 shows an example in which a part of the functions of the control device 40 are implemented by dedicated hardware 420 . All the functions of the control device 40 may be realized by dedicated hardware 420 . Dedicated hardware 420 can be single circuits, multiple circuits, programmed processors, parallel programmed processors, ASICs, FPGAs, or combinations thereof.

5. Others Although the preferred embodiments and the like have been described in detail above, the present disclosure is not limited to the above-described embodiments and the like. Various modifications and replacements can be added to the above.

Hereinafter, various aspects of the present disclosure will be collectively described as appendices.

(Appendix 1)
a plurality of steps that are endlessly connected and circulating; a driving motor that drives the plurality of steps; a driving rotating body that is connected to the driving motor; a reduction gear; and a driven rotation that is connected to the reduction gear An abnormality detection device for a passenger conveyor, comprising: a body, an endless transmission belt wound around the driving rotator and the driven rotator, and an idler for adjusting the tension of the endless transmission belt,
a first speed detection unit for detecting a first speed, which is the running speed of the endless transmission belt, from the rotation speed of the idler;
a second speed detection unit for detecting a second speed, which is the circulating speed of the endless transmission belt, from the circulating time of the endless transmission belt;
a computing unit that computes a state quantity for determining whether or not there is an abnormality in the transmission endless belt,
An abnormality detection device for a passenger conveyor, wherein the computing unit computes an amount of elongation of the endless transmission belt by comparing the first speed and the second speed.
(Appendix 2)
further comprising a third speed detection unit for detecting a third speed, which is a nominal speed of the endless transmission belt, from the rotation speed of the drive rotor;
The calculation unit is configured to calculate a slip amount between the endless power transmission belt and the drive rotor or an amount of wear of the endless power transmission belt by comparing the first speed and the third speed. An abnormality detection device for a passenger conveyor according to Supplementary Note 1.
(Appendix 3)
further comprising a fourth speed detector for detecting a fourth speed, which is a nominal speed of the endless transmission belt, from the rotational speed of the driven rotor;
The calculation unit is configured to detect a slip amount between the endless transmission belt and the driven rotating body or an amount of wear of the endless transmission belt by comparing the first speed and the fourth speed. An abnormality detection device for a passenger conveyor according to Supplementary Note 1.
(Appendix 4)
3. The passenger conveyor according to any one of appendices 1 to 3, further comprising a determination unit that determines whether or not there is an abnormality in the endless transmission belt by comparing the state quantity calculated in the calculation unit with a state threshold value. anomaly detector.
(Appendix 5)
5. An abnormality detection device for a passenger conveyor according to appendix 4, further comprising a notification unit that notifies information of the determined abnormality when the determination unit determines that there is an abnormality in the endless transmission belt.
(Appendix 6)
The drive rotor is a drive pulley,
The driven rotating body is a driven pulley,
The abnormality detection device for a passenger conveyor according to any one of appendices 1 to 5, wherein the transmission endless belt is a transmission belt.
(Appendix 7)
the drive rotor is a drive sprocket;
the driven rotating body is a driven sprocket,
The abnormality detection device for a passenger conveyor according to any one of appendices 1 to 5, wherein the transmission endless belt is a transmission chain.

1 truss, 2 steps, 3 exit, 4 machine room, 5 floor plate, 8 sprocket, 9 shaft, 10 sprocket, 11 sprocket, 12 step chain, 13 step shaft, 14 handrail chain, 15 drive unit, 16 moving handrail, 18 Sprocket 20 Drive unit 22 Drive motor 24 Reduction gear 26 Drive pulley 28 Driven pulley 30 Transmission belt 32 Idler 40 Control device 42 Drive side rotation speed sensor 44 Driven side rotation speed sensor 46 Idler rotation Speed sensor 48 Circling speed sensor 50 First speed detection unit 52 Second speed detection unit 54 Third speed detection unit 56 Fourth speed detection unit 60 Calculation unit 62 Judgment unit 64 Notification unit 100 Abnormality Detector 400 Processor 410 Storage Device 420 Dedicated Hardware 430 Processing Circuit

Claims (7)

a plurality of steps that are endlessly connected and circulating; a driving motor that drives the plurality of steps; a driving rotating body that is connected to the driving motor; a reduction gear; and a driven rotation that is connected to the reduction gear An abnormality detection device for a passenger conveyor, comprising: a body, an endless transmission belt wound around the driving rotator and the driven rotator, and an idler for adjusting the tension of the endless transmission belt,
a first speed detection unit for detecting a first speed, which is the running speed of the endless transmission belt, from the rotation speed of the idler;
a second speed detection unit for detecting a second speed, which is the circulating speed of the endless transmission belt, from the circulating time of the endless transmission belt;
a computing unit that computes a state quantity for determining whether or not there is an abnormality in the transmission endless belt,
An abnormality detection device for a passenger conveyor, wherein the computing unit computes an amount of elongation of the endless transmission belt by comparing the first speed and the second speed. further comprising a third speed detection unit for detecting a third speed, which is a nominal speed of the endless transmission belt, from the rotation speed of the drive rotor;
The calculation unit is configured to calculate a slip amount between the endless power transmission belt and the drive rotor or an amount of wear of the endless power transmission belt by comparing the first speed and the third speed. 2. An abnormality detection device for a passenger conveyor according to claim 1. further comprising a fourth speed detector for detecting a fourth speed, which is a nominal speed of the endless transmission belt, from the rotational speed of the driven rotor;
The calculation unit is configured to detect a slip amount between the endless transmission belt and the driven rotating body or an amount of wear of the endless transmission belt by comparing the first speed and the fourth speed. 2. An abnormality detection device for a passenger conveyor according to claim 1. 4. The determination unit according to any one of claims 1 to 3, further comprising a determination unit that determines whether or not there is an abnormality in the transmission endless belt by comparing the state quantity calculated by the calculation unit with a state threshold value. An abnormality detection device for passenger conveyors. 5. The abnormality detection device for a passenger conveyor according to claim 4, further comprising a reporting section for reporting information on the determined abnormality when the determination section determines that there is an abnormality in the transmission endless belt. The drive rotor is a drive pulley,
The driven rotating body is a driven pulley,
The abnormality detection device for a passenger conveyor according to any one of claims 1 to 3, wherein the transmission endless belt is a transmission belt. the drive rotor is a drive sprocket;
the driven rotating body is a driven sprocket,
The abnormality detection device for a passenger conveyor according to any one of claims 1 to 3, wherein the transmission endless belt is a transmission chain.

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