WO2007148547A1 - 搬送システム - Google Patents
搬送システム Download PDFInfo
- Publication number
- WO2007148547A1 WO2007148547A1 PCT/JP2007/061649 JP2007061649W WO2007148547A1 WO 2007148547 A1 WO2007148547 A1 WO 2007148547A1 JP 2007061649 W JP2007061649 W JP 2007061649W WO 2007148547 A1 WO2007148547 A1 WO 2007148547A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transport
- workpiece
- transfer
- conveyance
- branch point
- Prior art date
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- 238000003860 storage Methods 0.000 claims abstract description 16
- 230000032258 transport Effects 0.000 abstract description 181
- 102100033121 Transcription factor 21 Human genes 0.000 description 80
- 101710119687 Transcription factor 21 Proteins 0.000 description 80
- 238000000034 method Methods 0.000 description 29
- 238000004891 communication Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 18
- 239000000758 substrate Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000007689 inspection Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/04—Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
- G06Q10/047—Optimisation of routes or paths, e.g. travelling salesman problem
Definitions
- the present invention relates to a transport system that transports a transport target such as a workpiece.
- Japanese Patent Application Laid-Open No. 9-255114 discloses a system in which a host computer centrally manages a transport path and controls transport of each transport unit.
- a bar code for identifying the inspection product is added to the inspection product to be transported, and the conveyor reads the barcode and transports the inspection product to the inspection device. What selects whether it conveys to a conveyor is disclosed.
- Japanese Patent Publication No. 2000-117594 discloses a technique in which an ID tag is added to a work and information relating to the process management of the work is written to the ID tag at the head of the production line. In the ID tag, conveyance information related to the type of the passing process through which the workpiece passes is written, and the cake is conveyed in each process along the route according to the conveyance information.
- JP-A-7-287729 and JP-A-2000-117594 a bar code or ID tag is attached to a work, and information recorded on these is read out.
- the load on the host computer can be reduced.
- Japanese Patent Application Laid-Open No. 7-287729 records the type of workpiece (inspected product) on a barcode, and can only be used in a system in which the conveyance route is uniformly determined according to the type of workpiece.
- Japanese Patent Laid-Open No. 2000-117594 records the process through which a workpiece passes through an ID tag, and can only be used in a system in which the transport route to each process is uniformly determined.
- An object of the present invention is to improve the conveyance efficiency and reduce the burden on the host computer.
- a transport unit that forms a plurality of transport paths from a transport source to a transport destination and transports a workpiece along a transport path selected from the plurality of transport paths, and the transport unit Control means for controlling the workpiece, and when the workpiece has reached a branch point in the transfer route, stored in the workpiece and transfer route information indicating the transfer direction of the workpiece at the branch point in the transfer route
- a reading means for reading the conveyance path information from the storage medium, and the control means indicates the conveyance direction of the workpiece at the branch point indicated by the conveyance path information read by the reading means.
- a transport system is provided that controls the transport means so that the workpiece is transported.
- the transfer means forms a plurality of transfer paths from the transfer source to the transfer destination, there are a plurality of options for the transfer path of the work, so that the transfer efficiency of the work is improved. can do.
- the transfer route information is information indicating the transfer direction of the workpiece at the branch point in the transfer route, it is not necessary to set the transfer direction of the workpiece one by one at the branch point. Simplification of figure And flexibly respond to system layout changes. Brief Description of Drawings
- FIG. 2A is a schematic diagram of pod 1.
- FIG. 2B is a schematic configuration diagram of a unidirectional transport unit I.
- FIG. 2C is a schematic configuration diagram of the branch point conveyance unit J.
- FIG. 3 is a block diagram of a control system in the workpiece transfer system 100.
- FIG. 4A is a block diagram of the wireless IC tag 2.
- FIG. 4B is a diagram showing an example of information stored in the memory 201a of the wireless IC tag 2.
- FIG. 5 is a flowchart of processing executed by the CPU 51 of the host computer 50.
- FIG. 6 is a flowchart showing processing executed by CPU 61 of each control device 60.
- FIG. 7 is a flowchart showing a unidirectional transport unit control process in S14.
- FIG. 8 is a flowchart showing a branch point conveyance unit control process of S 15.
- FIG. 9 is a layout diagram showing another example of the transport facility 10.
- FIG. 10 is a layout diagram showing another example of the transport facility 10.
- FIG. 11 is a layout diagram showing another example of the transport facility 10.
- FIG. 1 is a layout diagram of a transfer facility 10 of a workpiece transfer system 100 according to an embodiment of the present invention.
- apparatuses A to E are apparatuses that are the transfer source of a work to be transferred, such as a processing apparatus that processes a work or a stock force that temporarily stores a work.
- the devices a to e are devices that are transport destinations of workpieces to be transported, and are, for example, processing devices that process workpieces or stock force that temporarily stores workpieces.
- the transfer facility 10 includes a plurality of workpiece transfer units II to 141 and J1-20 (hereinafter collectively referred to as workpiece transfer units I and J).
- workpiece transfer units I and J include a plurality of workpiece transfer units II to 141 and J1-20 (hereinafter collectively referred to as workpiece transfer units I and J).
- N, S, E, and W indicate the azimuths in the factory where the transfer equipment 10 is arranged, and a plurality of work transfer units I 1 to 141 and J1-20 are arranged in a matrix along these directions. It is arranged.
- the workpiece transfer units II to 141 and Jl-20 are arranged at the branch point of the transfer path and can change the transfer direction of the workpiece.
- unidirectional transport units II to 141 that transport the workpiece in one direction (indicated by the arrow in Fig. 1), and force configuration Has been.
- the transfer facility 10 is composed of a combination of the branch point transfer unit J and the unidirectional transfer unit I, so that the transfer from the device A to E that is the transfer source to the device a to e that is the transfer destination.
- the transfer route can be selected from a plurality of transfer routes.
- the workpiece transfer unit II ⁇ J1 ⁇ I2 ⁇ J2 ⁇ I3 ⁇ J3 ⁇ I4 ⁇ J4 ⁇ I5 or the workpiece transfer unit I1 ⁇ J1 ⁇ I6 ⁇ J5 ⁇ I11 ⁇ J6 ⁇ I16 ⁇ J10 ⁇ I21 ⁇ J11 ⁇ I22 ⁇ J12 ⁇ I18 ⁇ J8 ⁇ I9 ⁇ J4 ⁇ I5
- the workpiece transfer system 100 includes a reader / writer 21 provided for each of the devices A to E, and a reader / writer 22 provided for each branch point transfer unit J. .
- Reader / writers 21 and 22 are devices for reading and writing data to / from the memory of the wireless IC tag.
- the antenna of each reader / writer 21 is arranged at a position where data can be read from and written to the memory of the wireless IC tag provided in the pod 1 described later, which is carried out by the corresponding devices A to E.
- the antenna of the writer 22 is arranged at a position where data can be read from and written to the memory of the wireless IC tag provided in the pod 1 on each corresponding branch point transport unit J.
- FIG. 4A is a block diagram of the wireless IC tag 2.
- the wireless IC tag 2 includes an IC chip 201 and an antenna 202.
- the IC chip 201 includes a logic circuit 201b and a memory 201a.
- the antenna 202 receives a signal from the reader / writers 21 and 22, wireless communication with the reader / writers 21 and 22 is performed using power generated by the signal as a power source.
- the information stored in the memory 201a is transmitted or stored in the memory 201a.
- the memory 201a is used as a storage medium that stores transport path information of the pod 1.
- FIG. 4B is a diagram showing an example of information stored in the memory 201 a of the wireless IC tag 2.
- Address 0000 stores an ID uniquely assigned to each pod 1 in order to identify each pod 1.
- Below the address 1001 (addresses 1001 to: 1006) is stored transport path information indicating the transport direction of the pod 1 at a branch point in the transport path.
- the transport path information is configured as information indicating the transport direction of the pod 1 for each branch point transport unit J through which the pod 1 passes, and is stored in the order of the branch point transport unit J through which the pod 1 passes.
- the address is set and memorized.
- the transport direction in the transport route information is indicated by the directions N, S, E, and W in the factory where the transport facility 10 is provided.
- the transport path information in the example of Fig. 4B shows that transport unit I1 ⁇ J1 ⁇ I6 ⁇ J5 ⁇ I1 1 ⁇ J6 ⁇ I12 ⁇ J7 ⁇ I17 ⁇ J11 ⁇ I22 ⁇ J12 ⁇ I23 when transporting pod 1 from device A to device c. This shows the case where pod 1 is transported along the transport route.
- the address 1001 is the transfer direction (S) of the branch point transfer unit J1
- the address 1002 is the transfer direction (E) of the branch point transfer unit J5
- the address 1003 is the transfer direction (E) of the branch point transfer unit J6.
- the address 1004 indicates the transfer direction (S) of the branch point transfer unit KJ7
- the address 1005 indicates the transfer direction (E) of the branch point transfer unit J11
- the address 1006 indicates the transfer direction (E) of the branch point transfer unit J12.
- a pointer that refers to the storage address of the conveyance path information is stored.
- the initial value of the pointer is the branch point that pod 1 passes first.
- the storage address of the conveyance path information corresponding to the sending unit is set.
- address 1001 is set as the initial value.
- the pointer is updated by the reader / writer 22 provided for each branch point transport unit J, and the address value is added.
- Each of these workpiece transfer units is a fixed installation type workpiece transfer unit.
- various transfer paths are realized by a combination of substantially two types of work transfer units.
- multiple types of workpiece transfer units can be used.
- reducing the number of workpiece transfer units can reduce the cost of the entire system and simplify the transfer control of workpieces.
- FIG. 2B is a schematic configuration diagram of the unidirectional transport unit I.
- the unidirectional transport unit I is a belt conveyor type transport unit, an endless benolet 31, a drive roller 32 that is rotationally driven by a drive source (motor) (not shown), and an idle roller 33.
- the pod 1 on the belt 31 is conveyed by causing the belt 31 to travel by the rotation of the driving roller 32.
- a sensor 34 is disposed at the end of the unidirectional transport unit I on the carry-in side.
- the sensor 34 is a sensor that detects that the pod 1 is introduced into the unidirectional transport unit I, and is an infrared sensor, for example.
- FIG. 2C is a schematic configuration diagram of the branch point conveyance unit J.
- the branch point transport unit J is a belt conveyor type transport unit, and includes an endless belt 41, a drive roller 42 that is driven to rotate by a drive source (motor) (not shown), and an idle roller. 43, and the belt 41 is driven by the rotation of the driving roller 42, so that the pod 1 on the belt 41 is conveyed.
- a sensor 44 is disposed at the end of the branch point transport unit J on the carry-in side.
- the sensor 44 is a sensor that detects that the pod 1 is introduced into the branch point conveyance unit J, and is an infrared sensor, for example.
- the junction transport unit J is also equipped with a motor-driven turn unit 45.
- the turn unit 45 changes the transport direction of the pod 1 by rotating the entire upper belt conveyor (41 to 44) in units of 90 degrees. To do.
- FIG. 1 the layout of the transport facility 10 shown in FIG. 1 is an example, and various layouts can be adopted.
- 9 to 11 are diagrams showing other layout examples of the transport facility 10.
- FIG. Figure 9 Ray The out example is an example in which the work transfer units I and J are arranged in a non-matrix state between the devices A to D and the devices a to d. Further, in the example of FIG. 9, as the unidirectional transport unit I, units having different transport lengths are mixed.
- the layout example of FIG. 10 is an example in which a device as a transfer source is one device A and a device as a transfer destination is a plurality of devices a to d.
- the layout example of FIG. 11 is an example in which the device that is the transfer source is one device A and the device that is the transfer destination is also one device a.
- FIG. 3 is a block diagram of a control system in the workpiece transfer system 100 of the present embodiment.
- the workpiece transfer system 100 of this embodiment includes a host computer 50 and a control device 60 that controls the workpiece transfer units I and J, and these can communicate information with each other via a communication line 3 such as a LAN. It is configured.
- the devices A to E and a to e are also connected to the communication line 3, and the host computer 50 and the control device 60 are configured to be capable of information communication with the devices A to E and a to e.
- the control device 60 includes a CPU 61, a RAM 62 for storing temporary data, a ROM 63 for storing fixed data and programs, an HDD (node disk drive) 64 for storing control programs, and the like.
- Communication IZF65 which is an interface to communication line 3
- I / F66 which is an interface to reader / writer 22, work transfer unit I, J Yale.
- the devices A to E transfer the pod 1 to the devices a to e
- the devices A to E identify the pod 1 via the communication line 3 and transmit a transfer request to the host computer 50.
- the devices a to e identify the pod 1 and inform the host computer 50 via the communication line 3 that the transport has been completed.
- transport path information is generated according to the transport path set in S2, and the transport path information is written to the memory 201a of the wireless IC tag 2 provided in the pod 1 to be transported by the reader / writer 21.
- An initial value is written as a pointer. That is, the reader / writer 21 functions as a writing unit that writes the transfer route information based on the transfer route set by the host computer 50 in the memory 201a in the devices A to E that are the transfer sources.
- S 5 to S7 are processes related to resetting the transport path of the pod 1 that is in the middle of transport.
- the controller 60 sends a request to reset the transfer route to the host computer 50 when the transfer of the pod 1 on the initially set transfer route is difficult. To send through.
- the case where the transfer is difficult is a case where the initially set transfer path is congested due to transfer of other pods 1 or when a failure occurs in some work transfer units I and J along the transfer path.
- the transport path is changed in such a case to realize smooth transport of the pod 1.
- S5 it is determined whether or not there is a request for resetting the conveyance path from the control device 60. If applicable, go to S6, otherwise go to S8.
- S6 the transport route of pod 1 that has been requested to be reset is reset.
- the transport path is set by selecting a transport path that is reachable from the current position of the pod 1 to any of the transport destination devices a to e and different from the initial transport path.
- the set transport route is stored in the HDD 54 together with the ID of pod 1 (the original transport route is updated).
- transport route information is generated according to the transport route reset in S6, and is transmitted via the communication line 3 to the control device 60 that has made the reset request.
- FIG. 6 is a flowchart showing processing executed by the CPU 61 of each control device 60.
- S11 it is determined whether or not the sensor 34, 44 force Spod 1 of any workpiece transfer unit I, J which is the control target of the control device 60 is detected. If yes, go to S12, otherwise go to S16.
- a control command for causing the belts 31 and 41 to travel is output to the work transfer units I and J that have detected the pod 1.
- This control command is a command for temporarily moving the pod 1 to the reference position at the center of the work transfer units I and J.
- S16 other processing is executed and one unit of processing is completed. The CPU 61 returns to S11 and repeats the same processing.
- FIG. 7 is a flowchart showing the unidirectional transport unit control process in S14.
- a conveyance judgment process is performed.
- This determination is made by checking the state of the next branch point transport unit J if the next branch point transport unit J force is the control target of the control device 60, and the next branch point transport unit J In the case of a unit controlled by another control device 60, it is performed by inquiring the other control device 60 via the communication line 3.
- S22 if the result of the determination in S21 is that the pod 1 can be transported to the next branch point transport unit J, the process proceeds to S24, and if it cannot be transported, the process proceeds to S23. In S23, it waits for a predetermined time, and then returns to S21. That is, the pod 1 is waiting to be transported.
- a preparation command is output to the branch point transfer unit J which is the next work transfer unit.
- control is performed to move the direction of the branch point transfer unit J to the direction in which the pod 1 can be received.
- a preparation command is output to the other control device 60 via the communication line 3.
- a control command is output to the unidirectional transport unit I which is the current control target, and control is performed so that the pod 1 is transported to the next branch point transport unit J. This completes one unit of processing.
- FIG. 8 is a flowchart showing the branch point transport unit control process of S15.
- the transport route information is read from the memory 201a of the wireless IC tag 2 of the pod 1 by the reader / writer 22. That is, the reader / writer 22 functions as a reading unit that reads the conveyance path information from the memory 201a that stores the conveyance path information when the pod 1 reaches a branch point in the conveyance path.
- the conveyance path information is read by reading the pointer from the address 0001 of the memory 201a and reading the data stored at the address indicated by the pointer.
- the pointer value stored in the memory 201a of the wireless IC tag 2 of pod 1 is read. Add one by D / Writer 22 and write. The value of the pointer indicates the transport direction of the next branch point transport unit.
- the counter is set to an initial value.
- This counter is a software counter used to determine whether or not to request resetting of the transport path of the pod 1 to the host computer 50.
- the initial value is 3 times, for example.
- a conveyance determination process is performed.
- this determination is performed by checking the state of the unidirectional transport unit I if the next unidirectional transport unit I is a control target of the control device 60. If the next unidirectional transport unit I is a unit controlled by another control device 60, this is done by inquiring the other control device 60 via the communication line 3.
- S 35 if the result of the semi-IJ determination in S 34 is that the pod 1 can be transported to the next unidirectional transport unit I, the process proceeds to S 42, and if it cannot be transported, the process proceeds to S 36.
- S36 the counter value set in S33 is decremented by one.
- S37 it is determined whether or not the counter value is zero. If yes, go to S39, otherwise go to S38.
- S38 it waits for a predetermined time, and then returns to S34. That is, the pod 1 is waiting to be transported.
- a request for resetting the transport route is transmitted to the host computer 50 via the communication line 3.
- the standby process of S 38 is performed for the number of times of the initial value of the counter set in S 33, some trouble such as traffic jam or failure occurs in the transport path after the current position of pod 1. Is assumed to have occurred, and the transport route is reset.
- the reset transport path information is received from the host computer 50 via the communication line 3.
- the reset transport path information is written into the memory 201a of the wireless IC tag 2 by the reader Z writer 22. That is, the reader Z writer 22 functions as a writing unit that writes the conveyance path information based on the reset conveyance path to the memory 201a in the middle of the conveyance path. Then return to S33.
- a control command is output to the branch point transport unit J which is the current control target, and control is performed so that the pod 1 is transported to the next unidirectional transport unit I.
- the branch point transport unit J is controlled so that the pod 1 is transported in the transport direction indicated in the transport route information (or the transport route information after resetting received in S40). This completes one unit of processing.
- the transfer facility 10 forms a plurality of transfer paths from the devices A to E that are transfer sources to the devices a to e that are transfer destinations. Since there are multiple options for the transport path of pod 1, it is possible to improve the work transport efficiency.
- pod 1 When pod 1 reaches branch point transport unit J by performing transport control of pod 1 based on the transport path information stored in memory 201a of wireless IC tag 2 provided in pod 1, The controller 60 does not need to inquire the host computer 50 about the transport direction of the pod 1 every time. Therefore, the host computer 50 can centrally manage the work transfer route and reduce the burden on the host computer 50 compared to a system that executes control.
- the transport path information is information indicating the transport direction of the pod 1 at the branch point in the transport path
- the control logic of the transport control of the pod 1 can be simplified. In other words, it is not necessary to determine and set the workpiece transfer direction one by one at the branch point of the transfer route, and the transfer control process can be simplified.
- the transport route information is information indicating a process through which the pod 1 passes
- the control device 60 determines and set the transport direction along the next process step by step. Indicates the transport direction of pod 1, so such determination and setting are not necessary.
- the transfer route information indicates the transfer direction of the pod 1
- the layout change of the system can be flexibly dealt with.
- the transport route information is information indicating the process through which the pod 1 passes
- this relationship needs to be reset for each control device 60, but in this embodiment, such resetting is not necessary.
- the transport path of the pod 1 is changed in a timely manner by resetting the transport path to improve transport efficiency. That power S.
- the transport route information of the transport route initially set is also transport route information. Therefore, it is possible to share the control logic of the pod 1 transport control when the transport path is initially set and when the transport path is reset, thereby simplifying transport control.
- the present invention can be applied to other than the conveyance of a conveyance object in a production facility, processing facility, inspection facility, or the like, in which the conveyance object is generally called a workpiece.
- the conveyance object is generally called a workpiece.
- it can also be applied to the transportation of luggage, which is the object to be transported, in a logistics facility that sorts luggage, etc.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US12/306,316 US8245834B2 (en) | 2006-06-23 | 2007-06-08 | Transport system |
JP2008522387A JP4933544B2 (ja) | 2006-06-23 | 2007-06-08 | 搬送システム |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006174414 | 2006-06-23 | ||
JP2006-174414 | 2006-06-23 |
Publications (1)
Publication Number | Publication Date |
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WO2007148547A1 true WO2007148547A1 (ja) | 2007-12-27 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/061649 WO2007148547A1 (ja) | 2006-06-23 | 2007-06-08 | 搬送システム |
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US (1) | US8245834B2 (ja) |
JP (1) | JP4933544B2 (ja) |
WO (1) | WO2007148547A1 (ja) |
Cited By (3)
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KR101232982B1 (ko) | 2010-11-25 | 2013-02-13 | 씨제이 지엘에스 주식회사 | 전방향 리딩이 가능한 컨베이어 어셈블리 |
KR20180109762A (ko) * | 2017-03-28 | 2018-10-08 | 가부시키가이샤 다이후쿠 | 물품 반송 설비 |
WO2020090323A1 (ja) * | 2018-11-02 | 2020-05-07 | 村田機械株式会社 | コンベヤシステム |
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US8385230B2 (en) * | 2009-02-25 | 2013-02-26 | Microsoft Corporation | Automatic network address assignment in a wireless mesh |
WO2010113449A1 (ja) * | 2009-04-03 | 2010-10-07 | 村田機械株式会社 | コンベア装置 |
JP5449089B2 (ja) * | 2010-08-19 | 2014-03-19 | 富士機械製造株式会社 | シャトルコンベヤおよび対回路基板作業機 |
EP3016136B1 (en) * | 2014-10-27 | 2021-07-21 | Robert Bosch GmbH | Transport system with magnetically driven transport elements and according transportation method |
US9440799B1 (en) * | 2016-06-01 | 2016-09-13 | Finetek Co., Ltd. | Conveying apparatus |
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- 2007-06-08 JP JP2008522387A patent/JP4933544B2/ja not_active Expired - Fee Related
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101232982B1 (ko) | 2010-11-25 | 2013-02-13 | 씨제이 지엘에스 주식회사 | 전방향 리딩이 가능한 컨베이어 어셈블리 |
KR20180109762A (ko) * | 2017-03-28 | 2018-10-08 | 가부시키가이샤 다이후쿠 | 물품 반송 설비 |
KR102420964B1 (ko) * | 2017-03-28 | 2022-07-13 | 가부시키가이샤 다이후쿠 | 물품 반송 설비 |
WO2020090323A1 (ja) * | 2018-11-02 | 2020-05-07 | 村田機械株式会社 | コンベヤシステム |
CN112955387A (zh) * | 2018-11-02 | 2021-06-11 | 村田机械株式会社 | 输送系统 |
JPWO2020090323A1 (ja) * | 2018-11-02 | 2021-09-02 | 村田機械株式会社 | コンベヤシステム |
JP7127696B2 (ja) | 2018-11-02 | 2022-08-30 | 村田機械株式会社 | コンベヤシステム |
CN112955387B (zh) * | 2018-11-02 | 2022-09-16 | 村田机械株式会社 | 输送系统 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2007148547A1 (ja) | 2009-11-19 |
US20090183969A1 (en) | 2009-07-23 |
JP4933544B2 (ja) | 2012-05-16 |
US8245834B2 (en) | 2012-08-21 |
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