WO2020175139A1

WO2020175139A1 - Synchronization abnormality detection device and synchronization abnormality detection method

Info

Publication number: WO2020175139A1
Application number: PCT/JP2020/005313
Authority: WO
Inventors: 一仁吉谷; 太維中野
Original assignee: 日本電気株式会社
Priority date: 2019-02-27
Filing date: 2020-02-12
Publication date: 2020-09-03
Also published as: JP2020139537A

Abstract

This synchronization abnormality detection device comprises: a drive motor; a drive pulley rotated by the operation of the drive motor; a timing belt which engages with the drive pulley; a driven pulley which engages with the timing belt and rotates in conjunction with rotation of the drive pulley; a first detection means which outputs a first detection signal indicating the rotation cycle of the drive pulley; a second detection means which outputs a second detection signal indicating the rotation cycle of the driven pulley; and an abnormality determination means which determines whether or not an abnormality has occurred in the synchronization of the drive pulley and the driven pulley on the basis of the cycles indicated by the first and second detection signals.

Description

\¥02020/175139 1 ((17 2020/005313

Specification

Title of invention: Synchronization abnormality detection device and synchronization abnormality detection method

Technical field

The present invention relates to a synchronization abnormality detection device and a synchronization abnormality detection method, which are applied to a conveyance device or the like and detect a synchronization state of a drive mechanism that is interlocked with a timing belt drive.

Background technology

[0002] A mechanism using a pulley and a timing belt is known as a power transmission mechanism of a transfer device.

[0003] For example, the power transmission mechanism shown in Patent Document 1, a timing belt for transmitting the rotation of the tension has been ^_ square of the pulley between the two pulleys to the other pulley, detects the rotation of the pulleys It has a detector and a processing circuit which processes a detection signal from each detector.

Then, in the above processing circuit, it is determined whether or not the timing belt is broken or the timing belt and the pulley are slipped beyond the allowable range based on the detection voltage of the detection signal output from each detector. ..

Further, in the timing belt cutting prediction device disclosed in Patent Document 2, the timing belt that is stretched between two pulleys and transmits the rotation of one pulley to the other pulley, and the rotation of each pulley And a phase difference detection circuit that processes a detection signal from each rotation detection sensor.

Then, the phase difference detection circuit determines whether or not the timing belt is cut off based on the phase difference between the pulses output from the respective rotation detection sensors.

Prior art documents

Patent literature

[0005] Patent Document 1: Japanese Patent Laid-Open No. 11-19045

Patent Document 2: Japanese Patent Laid-Open Publication No. 59-1404954 \¥02020/175139 2 卩 (: 17 2020/005313

Summary of the invention

Problems to be Solved by the Invention

[0006] In the processing circuit disclosed in Patent Document 1, the presence or absence of timing belt disconnection and timing belt and pulley slippage is determined based on the detection voltage of the detection signal output from the detector.

In addition, the phase difference detection circuit disclosed in Patent Document 2 determines whether or not the timing belt is disconnected based on the phase difference between the pulses of the detection signal output from the rotation detection sensor.

However, in the abnormality detection method using the detection voltage or the phase difference between the pulses shown in Patent Documents 1 and 2 as described above, it is not possible to sufficiently detect the synchronization abnormality of the two pulleys. It was expected that new technology would be provided.

[0007] The present invention has been made in view of the circumstances described above. An example of an object of the present invention is to provide a synchronization abnormality detection device and a synchronization abnormality detection method that can reliably detect that synchronization is abnormal in two or more pulleys.

Means for solving the problem

[0008] A synchronization abnormality detecting device according to a first aspect of the present invention includes a drive motor, a drive pulley that is rotated by the drive of the drive motor, a timing belt that engages with the drive pulley, and the timing belt. The driven pulley that engages and rotates in conjunction with the rotation of the drive pulley, the first detection means that outputs a first detection signal indicating the rotation cycle of the drive pulley, and the rotation cycle of the driven pulley A second detection unit that outputs a second detection signal that is shown, and an abnormality determination that determines whether an abnormality has occurred in the synchronization of the drive pulley and the driven pulley based on the cycle indicated by the first and second detection signals. And means.

[0009] A synchronization abnormality detecting method according to a second aspect of the present invention relates to a method of rotating a drive pulley, wherein a drive pulley rotated by driving a drive motor and a timing belt engaged with the drive pulley are engaged. A method for detecting a synchronization abnormality for a drive mechanism having a driven pulley that rotates in conjunction with a drive pulley, the method comprising: 〇 2020/175 139 3 卩 (: 170? 2020 /005313

The first detection signal is output, the second detection signal indicating the rotation cycle of the driven pulley is output, and based on the cycle indicated by the first and second detection signals, the drive pulley and the driven pulley are This includes determining whether or not there is an abnormality in synchronization.

Effect of the invention

[0010] According to the embodiment of the present invention, it is possible to promptly deal with the occurrence of abnormality such as tooth jumping of the timing belt.

Brief description of the drawings

[001 1] [Fig. 18] A diagram showing a schematic configuration of a synchronization abnormality detection apparatus according to an embodiment of the present invention.

FIG. 6 is a diagram showing a detection signal of the synchronization abnormality detection device according to the embodiment of the present invention.

FIG. 2 is a plan view of a carrier device to which the embodiment of the present invention is applied.

FIG. 3 is a front view of the transfer device shown in FIG.

FIG. 48 is a front view showing a schematic configuration of the synchronization abnormality detection device according to the first embodiment of the present invention.

FIG. 48 is a side view showing a schematic configuration of the synchronization abnormality detection device according to the first embodiment of the present invention.

FIG. 5 is a diagram showing detection signals of the synchronization abnormality detection device.

[Fig. 6] A flow chart showing the control contents of the abnormality determination unit.

FIG. 7 is a schematic configuration diagram of a synchronization abnormality detection device according to a second embodiment of the present invention. FIG. 8 is a diagram showing a detection signal in a normal state.

FIG. 9 is a diagram showing a detection signal at the time of abnormality output from the synchronization abnormality detection device. MODE FOR CARRYING OUT THE INVENTION

[0012] A synchronization abnormality detection device 100 for a drive mechanism according to an embodiment of the present invention,

The explanation will be given with reference to 18 and 1.

As shown in FIG. 18, the synchronization abnormality detecting device 100 includes a drive mechanism having a drive motor 1, a drive pulley 2 and a driven pulley 3, a drive side sensor 4 and a drive side sensor 4. \\02020/175 139 4 (: 17 2020/005313

The moving side sensor 5 and the abnormality determination unit 6 are provided.

The drive pulley 2 is a toothed pulley fixed to the drive shaft 18 of the drive motor 1.

The driven pulley 3 is fixed to a support shaft 3 supported by a bearing (not shown). The driven pulley 3 is rotated by transmitting the rotation of the drive pulley 2 to the driven pulley 3 via the toothed timing belt 7. When the driven pulley 3 rotates, a driven body (not shown) connected to the other end of the support shaft 3 is driven.

The drive side sensor 4 is a detector that outputs a detection signal corresponding to the rotation of the drive pulley 2.

The driven side sensor 5 is a detector that outputs a detection signal in synchronization with the rotation of the driven pulley 3 that rotates in conjunction with the drive pulley 2.

In FIG. 1, the detection signal 3 of the drive side sensor 4 corresponding to the rotation of the drive pulley 2 is shown, and the detection signal 36 of the driven side sensor 5 corresponding to the rotation of the driven pulley 3 is shown.

[0015] The abnormality determination unit 6 is a cycle of the detection signals 38 and 3 output from the driving side sensor 4 and the driven side sensor 5.

Based on the above, it is a processing device that determines whether or not there is an abnormality in the synchronization between the drive pulley 2 and the driven pulley 3.

Specifically, in the abnormality determination unit 6, the cycle of each detection signal 3 8 and 3 which is output from the driving side sensor 4 and the driven side sensor 5.

It is determined that there is an abnormality in the synchronization of the two pulleys 2 and 3 when 1_M 1 to 1_M 3 are out of the range of the predetermined reference period. In addition, in the example of Fig. 1, it is shown that the cycle! ..

[0016] In the synchronization abnormality detecting device 100 configured as described above, in the abnormality determining unit 6, each detection signal output from the driving side sensor 4 and the driven side sensor 5 is detected.

Predetermined reference circumference 〇 2020/175 139 5 卩 (: 170? 2020 /005313

It can be determined that an abnormality has occurred in the synchronization of the drive pulley 2 and the driven pulley 3 when the speed is out of the range. Therefore, it is possible to promptly deal with the occurrence of an abnormality such as tooth jumping of the timing belt 7.

[0017] (First Embodiment)

The synchronization abnormality detection device 101 according to the first embodiment of the present invention will be described with reference to FIGS. 2 to 6.

2 and 3 show a carrier device 10 to which the synchronization abnormality detection device 10 1 according to the first embodiment is applied.

This transport device 10 is a transfer unit 11 for transporting parcels, a compartment storage unit 12 for storing parcels, and a transfer unit for distributing parcels transported by the transport unit 11 to the compartment storage units 12 A mechanism 13 and a drive mechanism 20 (see FIG. 4) for driving the compartment housing 12 are provided.

[0018] The transport section 11 is a transport lane for transporting packages one by one in the direction of arrow IV!1.

The division storage section 12 has a plurality of transfer boxes 12 which can be moved along arrow !\/! 2 directions intersecting the transfer direction of the transfer section 11. The parcel transported from the transport section 11 is stored in one of the transport boxes 1 28.

A plurality of transport boxes 1 2 of the compartments 1 2 are circulated in one direction (directions of arrows IV! 2 and IV! 3) by the circulation transport path 14 and the information attached to the package is read during the circulation. , Classification processing (not shown) is performed based on that information

The transfer mechanism 13 is located between the end of the transfer section 11 and the compartment storage section 12, and reciprocates along the moving direction of the transfer box 1 2 (not shown). Have.

The transfer plate performs a synchronous operation in which the moving direction and moving speed are the same as the moving direction and moving speed of the transport box 12. The transfer plate distributes the cargo transported in the transport section 11 to one of the transport boxes 1 2 in the sorting storage section 12. 〇 2020/175 139 6 卩 (: 170? 2020 /005313

[0020] The drive mechanism 20 for driving the compartment housing 12 shown in Figs. 2 and 3 includes a drive pulley 22, a timing belt 27 and a driven pulley as shown in Figs. 2 2 and 3. The drive pulley 22 is driven by the drive motor 21. The driven pulley 23 is connected to the drive pulley 22 by the timing belt 27, and rotates according to the rotation of the driven pulley 23.

The drive mechanism 20 is provided with a drive-side sensor 24, a driven-side sensor 25, and an abnormality determination unit 26 that compose the synchronization abnormality detection device 1011 according to the first embodiment. The abnormality determination unit 26 may be configured by a storage unit that stores a program and a II that executes the program.

The drive pulley 22 is a toothed pulley fixed to the drive shaft 21 of the drive motor 21.

The driven pulley 23 is fixed to a support shaft 23 supported by a bearing (not shown). The driven pulley 23 is rotated by transmitting the rotation of the drive pulley 22 to the driven pulley 23 via the toothed timing belt 27. Then, when the driven pulley 23 rotates, a driven body (not shown) connected to the other end of the support shaft 23 is driven.

The drive side sensor 24 (detection means) is a detector that outputs a detection signal 33 corresponding to the rotation of the drive pulley 22. That is, the drive side sensor 24 outputs a detection signal indicating the rotation cycle of the drive pulley 22. For example, the drive side sensor 24 outputs a detection signal 33 corresponding to the rotation of the drive pulley 22 as shown in FIG.

The drive side sensor 24 is installed on the main body of the drive and detects the passage of the drive side detected piece 2 4 8 and the drive side detected piece (detection piece) 2 4 which rotates together with the drive shaft 21 of the drive pulley 22. It has a drive side detection section (detection piece detection means) 24 for detecting.

The driven-side sensor (detection means) 25 is a detector that outputs a detection signal 3 in synchronization with the rotation of the driven pulley 23 that rotates in conjunction with the drive pulley 22. That is, the driven side sensor 25 outputs a detection signal indicating the rotation cycle of the driven pulley 23. For example, the driven side sensor 25 has a driven pulley 23 as shown in Fig. 5. The detection signal S b corresponding to rotation is output.

The driven side sensor 25 includes a driven side detected piece (detection piece) 25 A that rotates together with the support shaft 23 A of the driven pulley 23, and a driven side detected piece 25 A installed on the main body of the device. It has a driven side detection section (detection piece detection means) 25 B for detecting passage.

[0024] The abnormality determination unit (abnormality determination means) 26 includes a driving side sensor 24 and a driven side sensor.

Based on the periods L a 1 to L a 3 and L b 1 to L b 3 of the detection signals S a and S b output from 25, whether or not there is a synchronization error between the drive pulley 2 2 and the driven pulley 2 3 It is a processing device that determines whether or not.

Specifically, in the abnormality determination unit 26, the cycles L a 1 to L a 3, L b 1 to L a 1 to L a 1 of the detection signals S a and S b output from the driving side sensor 24 and the driven side sensor 25 are used. If L b 3 falls outside the range of the predetermined reference period (LO), it is determined that there is an abnormality in the synchronization between the drive pulley 22 and the driven pulley 23 (see Fig. 5). In the example shown in Fig. 5, the period L b 2 is out of the range of the predetermined reference period (LO) that is considered normal, and it indicates that the drive pulley 2 2 and the driven pulley 23 are not synchronized. ing.

[0025] This abnormality determination unit 26 is a phase difference d1 to d indicated by the difference in the output timing of the detection signal S a from the driving side sensor 24 and the detection signal S b from the driven side sensor 25. Even when 3 is out of the range of the predetermined reference phase difference (d O), it is determined that the drive pulley 22 and the driven pulley 23 are abnormal in synchronization.

In the example shown in Fig. 5, the phase difference d3 is out of the range of the predetermined reference phase difference (d0) that is considered normal, and there is an abnormality in the synchronization of the drive pulley 2 2 and the driven pulley 23. Is shown. Here, when the phase difference is d3, the rotation pulse of the drive pulley 2 2 (Motor) (the pulse indicated by the detection signal S a) is detected without discriminating the abnormality in the length of the phase difference d3. The rotation pulse of the driven pulley 2 3 (Screw) (pulse indicated by the detection signal S b) that should rise with a delay of a predetermined phase difference rises before the rotation pulse of the drive pulley 2 2 (Motor). The abnormality can be determined by detecting that.

Next, regarding the control flow of the abnormality determination unit 26 according to the present embodiment, FIG. 〇 2020/175 139 8 卩 (: 170? 2020 /005313

It will be described with reference to FIG.

《Step 3 1》

After the operation of the drive motor 21 of the drive mechanism 20 is started, the abnormality determination unit 26 erases and initializes the data in the internal storage unit, and proceeds to the next step 32.

[0027] <<Step 3 2>>

As the drive pulley 2 2 and the driven pulley 23 rotate due to the driving of the drive motor 21, the abnormality determination unit 26 outputs the detection signals output from the drive side sensor 24 and the driven side sensor 25.

Take 3 swallows.

[0028] 《Step 3 3》

The abnormality determination section 26 is a cycle of the detection signals 3 3 and 3 6 output from the driving side sensor 24 and the driven side sensor 25.

It is determined whether it is within the range of the predetermined reference cycle (!_ 0). The anomaly judgment unit 26 determines the period of each detection signal 3 3, 3 6.

If it is within the range of the predetermined reference period (!_ 0) (in case of 3), the rotation period is regarded as normal and the process proceeds to step 3 4. The abnormality determination unit 2 6

Steps of ₃ swallows 1_ ₃ 1 ~ 1_ ₃ 3 ,1_ swallow 1 ~ 1_ swallow 3 is not within the range of the predetermined reference period (1_ 0) (in the case of N 0), the rotation period is abnormal Go to 3 5

[0029] <<Step 3 4>>

The abnormality determination unit 26 is the detection signal 3 from the drive side sensor 24.

Also, it is determined whether the phase differences 1 to 3 indicated by the difference in the output timing of the detection signal 3 from the driven side sensor 25 are within the range of the predetermined reference phase difference (○). When the phase differences 1 to 3 are within the range of the predetermined reference phase difference (0) (case 3), the abnormality determination unit 26 determines that the rotation cycle is normal and returns to the previous step 32. If the phase differences 1 to 3 are not within the range of the predetermined reference phase difference (0) (in the case of N 0), the abnormality determination unit 26 determines that the rotation is abnormal and proceeds to step 35.

[0030] 《Step 3 5》〇 2020/175 139 9 卩 (: 170? 2020 /005313

The abnormality determination unit 26 determines that the drive mechanism 20 is abnormal based on the determination results of Step 33 and Step 34.

[0031] 《Step 3 6》

The abnormality determination unit 26 outputs an alarm signal for notifying the operator that there is a synchronization abnormality in the drive mechanism 20 and outputs a stop signal for stopping the drive mode 21 of the drive mechanism 20. Is output and this flow chart is ended.

Then, in the synchronization abnormality detection device 10 01 configured as described above, in the abnormality determination unit 26, the detection signals 3 3 and 3 output from the drive side sensor 24 and the driven side sensor 25 are detected. 6 cycles

If it is out of the range of the reference cycle (1-0), it can be determined that the drive pulley 22 and the driven pulley 23 are abnormal in synchronization.

Further, in the above-mentioned synchronization abnormality detecting device 101, in the abnormality determining unit 26, the detection signal from the driving side sensor 24 and the detection signals 3 ₃ and 3 from the driven side sensor 25 are output timings. When the phase difference 1 to 3 indicated by the difference is out of the range of the reference phase difference (○), it can be determined that the drive pulley 22 and the driven pulley 23 are abnormal in synchronization.

That is, in the synchronization abnormality detecting device 10 1 of the present embodiment, based on the abnormality determination result of the abnormality determining unit 26, the operator can promptly respond to the occurrence of an abnormality such as a tooth jump of the timing belt 27. The work interruption time of the equipment can be reduced as much as possible.

As a result, in the transport device 10, periodic visual inspection is not required, and a sign can be detected. Therefore, large damage can be prevented and trouble repair can be reduced.

[0034] (Second Embodiment)

A synchronization abnormality detecting device 102 according to the second embodiment of the present invention will be described with reference to FIGS. 7 to 9.

In the synchronization abnormality detection device 102 of the second embodiment, the same reference numerals are given to the same components as those of the synchronization abnormality detection device 10 1 of the first embodiment, and duplicate explanations are given. 〇 2020/175 139 10 卩 (: 170? 2020 /005313

Omit the description.

The drive mechanism 30 shown in FIG. 7 of the second embodiment differs from the drive mechanism 20 shown in FIG. 4 of the first embodiment in the structure of the number of driven pulleys.

That is, the driven pulley 31 of the drive mechanism 30 shown in FIG.

2 2, a first driven pulley 23, an intermediate pulley 32, and a second driven pulley 34. The drive pulley 22 is fixed to the drive shaft 21 of the drive motor 21. The first driven pulley 23 is connected to the drive pulley 22 via a first timing belt 27. The intermediate pulley 32 is fixed to the same shaft as the shaft to which the first driven pulley 23 is fixed, that is, the support shaft 23 8. The intermediate pulley 32 rotates according to the rotation of the first driven pulley 23. 2nd driven pulley

34 is connected to the intermediate pulley 32 via a second timing belt 33. The support shaft 34 of the second driven pulley 34 is supported by a bearing (not shown).

[0036] The drive shaft 2 18 of the drive pulley 2 2 and the support shaft 2 3 8 of the first driven pulley 2 3

2 The driven shaft 34 of the driven pulley 34 is provided with a driving side sensor 24, a first driven side sensor 25 and a second driven side sensor (detection means) 35 for detecting the rotation of each shaft. ing. The structure of each of these sensors 24, 25, 35 is the same as the structure of the sensors 24, 25 shown in FIGS. 4 and 4 in the first embodiment.

[0037] These driving side sensor 24, first driven side sensor 25 and second driven side sensor 3

From each of 5, the detection signal 3 that detects the passage of the detected piece

3 6 and 30 are output to the abnormality determination unit 36.

In the abnormality judging section 36, the detection signals output from the driving side sensor 24, the driven side sensors 25 and 35

3 swallows, 30 cycles

3,

Based on the above, it is determined whether or not there is an abnormality in the synchronization of the drive pulley 22 and the driven pulleys 23 and 34.

Specifically, in the abnormality determination section 36, the detection signals 3 output from the driving side sensor 24, the driven side sensors 25 and 35 are ₃ cycles, and the cycle of 30 is 1_ ₃ 1 to 1_ 3 〇 2020/175 139 1 1 卩 (: 170? 2020 /005313

3,

It is judged that an abnormality has occurred in the synchronization of the drive pulley 22 and the driven pulleys 23 and 3 4 when it falls outside the range of the predetermined reference cycle (1_0) (see Figures 8 and 9).

[0038] FIG. 8 shows a case where the cycle is normal. Figure 9 shows the case where an abnormality occurs in part of the cycle.

In the example shown in Fig. 9, the cycle 1_○ 2 (cycle !_○ 2 = 1 0 2 3) is outside the range of the normal reference cycle (1-0 = 1 6 5 3) Indicates that the second driven pulley 3 4 has a synchronization error.

[0039] This abnormality determination unit 36 is a detection signal 3 output from the driving side sensor 24, the driven side sensors 25 and 35.

Even if the phase difference 1 to 3, 1 to 3 indicated by the output timing difference of 3 and 30 is outside the range of the reference phase difference (0), the drive pulley 22 and the driven pulley 23 It is determined that there is an error in the synchronization of.

[0040] In the example shown in Fig. 9, the phase difference 3 is out of the range of the normal reference phase difference (○), indicating that the second driven pulley 34 has a synchronization error.

The control content of the abnormality determination unit 36 is the same as the control flow shown in FIG. 6 in the first embodiment, and a duplicate description will be omitted.

[0041] In the synchronization abnormality detection device 102 configured as described above, the detection signals output from the driving side sensor 24, the driven side sensors 25 and 35

3 6, 3 laps

When it is out of the range of the reference period (1_0), it can be determined that the drive pulley 22 and the driven pulleys 23 and 34 are out of synchronization.

In addition, in the above-mentioned synchronization abnormality detection device 102, in the abnormality determination section 36, the detection signal 3 output from the driving side sensor 24, the driven side sensors 25 and 35

Phase difference indicated by the difference in output timing between 3 and 30

Even when 3 and 1 to 3 are out of the range of the reference phase difference (○), it can be determined that the drive pulley 22 and the driven pulleys 23 and 34 are out of synchronization. here, If the phase difference is d 3 ′, the driven pulley that should rise after a predetermined phase difference with respect to the rotation pulse of the drive pulley 22 (Motor) without discriminating whether the length of d 3 ′ is abnormal. The rotation pulse of 23 (Upper screw) (pulse indicated by detection signal S b) or rotation pulse of driven pulley 34 (Lower screw) (pulse indicated by detection signal S c) is simply rotation of drive pulley 22 (Motor). Abnormality can be determined by detecting the rise before the pulse.

[0042] That is, in the synchronization abnormality detection device 102 of the present embodiment, based on the abnormality determination by the abnormality determination unit 36, the operator can promptly deal with the occurrence of an abnormality such as a tooth jump of the timing belts 27 and 33. The work interruption time of the equipment can be reduced as much as possible.

[0043] In the second embodiment, the driven pulley 31 is coupled to the two driven pulleys 23 and 34 in the second embodiment. However, the number of driven pulleys is not limited to two and may be three or more.

In the first and second embodiments, the cycle L a 1 to L a 3, L b 1 to L b 3,

If the L c 1 to L c 3 and the phase differences d 1 to d 3, d 1 to d 3 deviate from the reference period ([_ 0) and the reference phase difference (d O), it means that a synchronization error has occurred. However, the reference period (L 0) and the reference phase difference (d O) may have a certain range.

In addition, in these first and second embodiments, the detected cycle L a 1 to L a 3, L b 1 to L b 3, L c 1 to L c 3 and the phase difference d 1 to d 3, d 1 d ^3, of the magnitude, timing belt 27, how much 33 teeth, may be detected Luke have tooth jump.

[0044] The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like without departing from the scope of the present invention are also possible. included.

[0045] This application is Japanese Patent Application No. 201 9-0 filed on February 27, 2009.

Claim 34343-based priority and incorporate all of its disclosures here 〇 2020/175 139 13 卩 (: 170? 2020 /005313

Industrial availability

The embodiment of the present invention relates to a synchronization abnormality detection device and a synchronization abnormality detection method which are applied to a conveyance device or the like and detect a synchronization state of a drive mechanism that is interlocked with timing belt drive.

Explanation of symbols

[0047] 1 Drive motor

1 eight drive shaft

2 Drive pulley

3 Driven pulley

3-8 support shaft

4 Drive side sensor

5 Driven sensor

6 Abnormality judgment section

7 Timing belt

1 0 Conveyor

20 Drive mechanism

2 1 Drive motor

2 1 Drive shaft

22 Drive pulley

23 Driven pulley

23 Support shaft

24 Drive side sensor

25 Driven sensor

26 Abnormality judgment section

27 Timing belt

30 Drive mechanism

3 1 Driven pulley 〇 2020/175 139 14 卩 (: 170? 2020 /005313

32 Intermediate pulley

33 Timing belt

34 Driven pulley

35 Driven sensor

Eight drive mechanism

1 00 Sync error detector

1 01 Synchronization error detector

1 02 Synchronization error detector

3 8 detection signal

36 Detection signal

3 ^ detection signal

36 Detection signal

30 Detection signal

○! 1 to ○! 3 Phase difference

1 to 3 phase difference

Claims

〇 2020/175 139 15 卩(: 170? 2020/005313 Claims

[Claim 1] A drive motor,

A drive pulley which is rotated by the drive of the drive motor,

A timing belt that engages with the drive pulley; a driven pulley that engages with the timing belt and that rotates in conjunction with rotation of the drive pulley;

First detection means for outputting a first detection signal indicating the rotation cycle of the drive pulley,

Second detection means for outputting a second detection signal indicating the rotation cycle of the driven pulley,

Abnormality determining means for determining whether or not there is an abnormality in synchronization between the drive pulley and the driven pulley based on the cycle indicated by the first and second detection signals,

Abnormality detecting device having

[Claim 2] The abnormality determining means synchronizes the drive pulley and the driven pulley with each other when at least one of the cycles indicated by the first and second detection signals is out of a reference cycle range. The synchronization abnormality detection device according to claim 1, wherein it is determined that an abnormality has occurred.

[Claim 3] When the phase difference between the cycle indicated by the first detection signal and the cycle indicated by the second detection signal is out of the range of the reference phase difference, the abnormality determination means is configured to drive the drive pulley. 3. The synchronization abnormality detection device according to claim 1, wherein it is determined that there is an abnormality in synchronization between the driven pulley and the driven pulley.

[Claim 4] The first detection means includes a first detection piece that rotates together with the drive pulley, and a first detection piece detection means that detects passage of the first detection piece. Has a second detection piece that rotates together with the driven pulley, and second detection piece detection means that detects passage of the second detection piece. 〇 2020/175 139 16 卩 (: 170? 2020 /005313

The synchronization abnormality detecting device according to any one of claims 1 to 3.

[Claim 5] The driven pulley includes a plurality of driven pulleys,

The synchronization abnormality detecting device according to any one of claims 1 to 4, wherein the plurality of driven pulleys are connected to the drive pulley via the timing belt.

[Claim 6] The timing belt has a first timing belt and a second timing belt,

The plurality of driven pulleys include a first driven pulley connected to the drive pulley via the first timing belt, and an intermediate pulley fixed to a shaft on which the first driven pulley is fixed to the second driven pulley. 6. The synchronous abnormality detecting device according to claim 5, further comprising: a second driven pulley connected via a timing belt.

7. The synchronous abnormality detecting device according to claim 1, wherein the abnormality determining means stops the drive motor when it is determined that the abnormality has occurred.

[Claim 8] A drive mechanism having a drive pulley that is rotated by the drive of the drive motor, and a driven pulley that is engaged with a timing belt that is engaged with the drive pulley and that rotates in conjunction with the rotation of the drive pulley. Is a method for detecting synchronization abnormalities in

Outputting a first detection signal indicating the rotation cycle of the drive pulley, outputting a second detection signal indicating the rotation cycle of the driven pulley, based on the cycle indicated by the first and second detection signals, A synchronization abnormality detecting method, comprising determining whether or not an abnormality has occurred in synchronization between a drive pulley and the driven pulley.