JP5700107B2 - Carrier transport system - Google Patents

Description

  The present invention relates to a carrier transport system for shortening a carrier transport waiting time to a load port.

  Regarding this type of technology, for example, there is one described in Patent Document 1. The transport system described in Patent Literature 1 includes a load port, a relay unit disposed adjacent to the load port, and a carrier transfer device incorporated in the load port and the relay unit. The carrier transfer device includes a carrier moving device and an elevating device installed below the load port and the mounting unit for the relay unit. The carrier is transported to a load port (load port group) by a transport vehicle such as an OHT (Overhead Hoist Transfer overhead traveling unmanned transport vehicle). According to this transport system, the carrier can be placed (carrier placement) and picked (carrier reception) by one OHT movement, and the carrier transport waiting time can be achieved without using a device with a large number of load ports. Can be shortened.

JP 2008-244416 A

  However, in the transport system described in Patent Document 1, since the carrier transfer device is incorporated in the load port and the relay unit itself (inside), the existing load port (the load port not equipped with the carrier transfer device) can be used. In applying the transfer system, the existing load port cannot be used as it is. That is, there is a problem that modification of the existing load port or update (replacement) of the load port set is required.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a carrier transport system that does not require updating of an existing load port.

  The present invention includes an OHT that can move along a rail disposed on a ceiling side and that can be lifted and lowered with a hoist portion that supports the hoop, and that can transfer the hoop to and from a load port provided on the floor side. And a temporary placement table for temporarily placing a hoop that is disposed below the OHT and is transferred to the load port, wherein the temporary placement table is in the running direction of the OHT. The hoist is moved up and down with respect to the load port while being placed at a different position from the load port and the OHT is stopped at the load port stop position set at a position overlapping the load port in the vertical direction. The hoist is moved up and down in a state where the hoop is configured to be freely transferred and stopped at the temporary table stop position set at a position overlapping with the temporary table. The hoop can be transferred to and from the temporary table, and a carrier that can move the hoop between the temporary table and the load port is provided with a lift that supports the hoop. The loading carriage is in a state where it overlaps with the OHT and the load port, and the load port is transferred between the load port and the load port, and the hoop is transferred between the temporary placement table. Transfer position for temporary table, retreat position during transfer to avoid interference with the hoist part and hoop when the OHT transfers the hoop to and from the load port, and the OHT with the temporary table When the hoop is transferred between the hoists and the hoop, the self-moving unit moves along the traveling direction at a height between the load port and the OHT over a retracted position during temporary placement that avoids interference with the hoist part and the hoop. A travel rail that supports the carrier transfer carriage and guides the movement along the travel direction, and the travel rail is stopped at the load port stop position and the temporary placement table stop position. The carrier transport system is configured to form a space through which the hoist part and the hoop can pass in the vertical direction when the OHT transfers the hoop.

  Further, in the present invention, the traveling rail is a pair of spaced apart in the width direction of the carrier transfer carriage in a state where the hoist portion supporting the hoop forms a gap that can pass in the vertical direction. You may be comprised with the rail member.

  Further, in the present invention, the load port transfer position and the temporary table transfer position are set in a state adjacent to each other in the traveling direction, and the controller for controlling the movement operation of the carrier transfer carriage is configured such that the OHT is When transferring the hoop to and from the load port, the carrier transfer carriage is made to stand by at the temporary placement table transfer position as the retracted position at the time of transfer, and the OHT moves the hoop to the temporary placement table. When transferring, the carrier transfer carriage may be configured to control the movement operation of the carrier transfer carriage so that the carrier transfer carriage stands by at the load port transfer position as the temporary retreat position.

  Furthermore, in the present invention, the carrier transfer carriage is configured to be capable of supporting a hoop suspended by the lift, and the upper end of the supporting hoop is supported by the lift in the carrier transfer carriage. The hoop may be placed and supported so as to be positioned below the lower end of the hoop.

  Further, in the present invention, a plurality of the load port transfer positions are set in a state of being aligned along the travel direction, and the temporary placement table is arranged on one side and the other side in the travel direction of the plurality of load port transfer positions. The temporary placement table transfer positions are set on one side and the other side in the traveling direction of the plurality of load port transfer positions, and the load port stop position is , A plurality of load port transfer positions are set in a state of being vertically aligned with the plurality of load port transfer positions, and the temporary placement table stop position is the travel direction of the plurality of load port stop positions. It may be set on both the one side and the other side.

  According to the present invention, it is possible to provide a carrier transport system that does not require updating of an existing load port.

It is a schematic front view which shows the carrier transfer promotion apparatus which concerns on 1st Embodiment of this invention. It is a schematic plan view (AA arrow view) of the carrier transfer promotion apparatus shown in FIG. It is a figure which shows the conveyance flow of a hoop. It is a figure which shows the conveyance flow of a hoop. It is a figure which shows the conveyance flow of a hoop. It is a figure which shows the conveyance flow of a hoop. It is a schematic perspective view which shows the modification of the carrier transfer promotion apparatus which concerns on 1st Embodiment. It is a schematic front view which shows the carrier transfer promotion apparatus which concerns on 2nd Embodiment of this invention. It is a schematic front view which shows the carrier transfer promotion apparatus which concerns on 3rd Embodiment of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(Carrier transport system)
The configurations of the carrier transport system 50 and the carrier transfer promotion device 1 will be described with reference to FIGS. As shown in FIG. 1, the carrier transport system 50 includes an OHT 7 (Overhead Hoist Transfer overhead traveling unmanned transport vehicle) traveling on the ceiling side in the factory, a rail 9 (track) on which the OHT 7 travels, and a lower part of the rail 9. And a carrier transfer promoting device 1 provided for the load port 6.

(OHT)
The OHT 7 is a carrier transport unit that travels above a carrier transfer carriage 3 described later, and has a hoist unit 71 that moves up and down by belt driving. The OHT 7 lifts the hoop 38 (8) (FOUP (Front Opening Unified Pod)) by the hoist part 71, travels in one direction, and conveys the hoop 38 (8). An example of a carrier will be described in FOUP.

  The carrier transport means may be OHS (Over Head Shuttle overhead traveling shuttle), RGV (Rail Guided Vehicle unmanned transport vehicle), AGV (Automated Guided Vehicle unmanned transport vehicle), etc. instead of OHT7. . RGV and AGV are carrier conveying means that travel on the floor side in the factory.

  The hoop 38 (8) has a main body 81 and a flange portion 82 attached to the upper surface of the main body 81. For example, a plurality of semiconductor substrates are stored in the main body 81. The hoop 38 (8) is lifted by the OHT 7 at the flange portion 82 and conveyed. The hoop 38 (8) corresponds to the carrier in the present invention. Note that the carrier is not limited to the hoop 38 (8).

(Rail (track))
The rail 9 is installed by being suspended from the ceiling of the factory. When the carrier transport means is RGV, the rail (track) is installed on the floor of the factory.

(Load port)
The load port 6 is a device for opening and closing the lid 83 (see FIG. 2) of the hoop 8 placed on the placing table 61. A mounting table 61 is provided on the front side of the load port 6. A process device (not shown) for processing a semiconductor substrate or the like is disposed on the rear surface side of the load port 6.

(Carrier transfer promotion device of the first embodiment)
The carrier transfer promotion device 1 includes a temporary table 2, a carrier transfer vehicle 3, a support member 4 that supports the temporary table 2 and the carrier transfer vehicle 3, and a controller 5 that controls the operation of the carrier transfer vehicle 3 ( Transfer cart control means).

(Temporary table)
The temporary placement table 2 is a table on which the hoop 8 is temporarily placed. The temporary table 2 includes a bracket 21 attached to the side surface of the leg member 42 of the support member 4 and a base 22 fixed to the upper surface of the bracket 21. In the present embodiment, the temporary placement table 2 is disposed on the downstream side in the transport direction of the FOUP 8 with respect to the placement table 61 (load port 6).

(Carrier transfer cart)
The carrier transfer cart 3 travels horizontally above the mounting table 61 and the temporary mounting table 2 of the load port 6 and moves the hoop 8 up and down to transfer the hoop 8 between the mounting table 61 and the temporary mounting table 2. Is to do.

  The carrier transfer carriage 3 includes a carriage 31 to which wheels are attached and a lift device 32 attached to the carriage 31. The lift device 32 is, for example, a belt drive. The carrier transfer carriage 3 travels in the horizontal direction above the placement table 61 and the temporary placement table 2 of the load port 6 by the carriage 31, and raises and lowers the hoop 8 by the lift device 32. There may be a plurality of carrier transfer carts 3.

(Support member)
The support member 4 is disposed in the horizontal direction, and a traveling rail 41 on which the carrier transfer carriage 3 travels, and four leg members 42 provided so as to extend vertically downward from the end of the traveling rail 41. It comprises. As illustrated in FIG. 2, the traveling rail 41 includes two rail members 41 a arranged in parallel and two connecting members 41 b that connect the rail members 41 a to each other. The distance between the two rail members 41a is set such that the hoop 8 that moves up and down between the rail members 41a does not interfere with the rail member 41a. Similarly, the position of the connecting member 41b is a position that avoids the vertical upper side of the hoop 8 so that the hoop 8 and the connecting member 41b do not come into contact with each other while the hoop 8 is moved up and down.

  In the present embodiment, the support member 4 is erected with respect to the floor surface in the factory by the four leg members 42 and is not in contact with the load port 6. Note that a bracket (not shown, one component of a support member) or the like may be attached to the load port 6 so as to support the load port 6. Further, the rail member 41a on the process apparatus side may be attached to the process apparatus.

(controller)
The controller 5 controls the operation of the carrier transfer cart 3 so as to avoid contact between the carrier transfer cart 3 and the hoop 8 during delivery of the hoop 8 between the mounting table 61 or the temporary table 2 and the OHT 7. And a transfer cart control unit. Here, the transfer cart control unit refers to, for example, a program unit of a microcomputer incorporated in the controller. The controller 5 is disposed in the space below the temporary table 2 and is attached to the side surface of the leg member 42 of the support member 4.

(Operation of carrier transfer promotion device)
Next, based on FIGS. 3 to 6, an example of the transport flow of the FOUP 8 using the carrier transfer promoting device 1 will be described, and the control of the carrier transfer cart 3 by the controller 5 (transfer cart control unit). explain. The movement of the carrier transfer cart 3 described below is realized by the transfer cart control unit incorporated in the controller 5.

(Evacuation of carrier transfer cart)
When the OHT 7 attempts to place the hoop 8 on the placement table 61 of the load port 6, the carrier transfer carriage 3 is retracted to a position avoiding the upper position of the placement table 61 by a signal from the controller 5 ( Step (1)). In the present embodiment, the carrier transfer cart 3 is retracted to a position above the temporary table 2.

  In addition, as shown with the imaginary line (two-dot chain line) in FIG. 3, you may extend the traveling rail 41 to the conveyance direction downstream rather than the temporary mounting base 2. FIG. And you may retract | save the carrier transfer trolley | bogie 3 to the position where the temporary mounting base 2 is not below. (Step (1) -2). According to this, the carrier transfer cart 3 does not hinder the transfer of the hoop between the temporary table 2 and another OHT.

  Further, when the OHT 7 tries to place the hoop 8 on the placement table 61 of the load port 6, if the carrier transfer carriage 3 is not located above the placement table 61, the controller 5 causes the placement table 61. It is confirmed that the carrier transfer carriage 3 is not located above the position.

(Hoop placement by OHT)
The OHT 7 holding the hoop 8 travels to a position above the mounting table 61 of the load port 6 (step (2)). When the OHT 7 arrives at a position above the mounting table 61 of the load port 6, the OHT 7 lowers the hoop 8 on the mounting table 61 (step (3)).

(Receiving another hoop by OHT)
Next, as shown in FIG. 4, the OHT 7 pulls up the hoist part 71 and then starts traveling to a position above the temporary table 2 (step (4)). On the other hand, the carrier transfer carriage 3 is controlled by the controller 5 on the condition that the OHT 7 has started running or the hoist portion 71 is not in the running space of the carrier transfer carriage 3 above the placement table 61. It moves from the upper position of the mounting table 2 toward the upper position of the mounting table 61 (step (5)).

  As shown in FIG. 4 and the like, a processed FOUP 18 containing a semiconductor substrate processed by a process device (not shown) disposed on the rear surface side of the load port 6 is placed on the temporary table 2. (The hoop 18 is transferred from the mounting table 61 to the temporary mounting table 2 by the carrier transfer cart 3).

  At this time, as shown in FIG. 5, when an empty OHT 7 that does not hold the hoop 8 arrives at a position above the temporary table 2, the OHT 7 pulls up the processed hoop 18 on the temporary table 2 (step). (6)). Thereafter, the OHT 7 conveys the hoop 18 to a predetermined position (step (7)).

  According to this transport system 50, it becomes possible to place a hoop (place a hoop (step (3))) and pick (receive a hoop (step (6))) (place and pick) by one-way transport using OHT7. The hoop conveyance waiting time can be shortened without employing an apparatus having a large number of load ports. In other words, the conveyance efficiency of the carrier conveyance system 50 can be improved.

(Transfer of hoop by carrier transfer cart)
When the carrier transfer carriage 3 arrives at an upper position of the mounting table 61, the semiconductor substrate is processed by the process device or the like until the processed FOUP 8 is stored (processed FOUP 8). Then, the carrier transfer cart 3 stands by at a position above the mounting table 61 by the controller 5.

  Here, when the processing of the FOUP 8 is completed, the controller 5 controls the carrier transfer cart 3 so that the processed FOUP 8 on the mounting table 61 is immediately transferred onto the temporary mounting table 2. Specifically, as shown in FIG. 6, when the hoop 8 on the mounting table 61 is in a state where the processed semiconductor substrate is accommodated, the carrier transfer carriage 3 immediately lifts the hoop 8 (step ( 8)), move horizontally (step (9)), and lower the hoop 8 on the temporary table 2 (step (10)).

  By placing the temporary table 2 downstream of the mounting table 61 (load port 6) in the conveying direction of the FOUP 8 and performing the above-described control, the processed FOUP remains on the mounting table 61 of the load port 6. Can save time. As a result, the waiting time for transporting the hoop to the load port 6 can be further reduced. Note that when the processing of the hoop 8 is completed means that the semiconductor substrate or the like has been processed by a process apparatus or the like and the processed semiconductor substrate or the like has been stored in the main body 81 of the hoop 8. .

  In this embodiment, the bottom level H1 of the hoop 8 (the main body 81 of the hoop 8) when the hoop 8 is lifted by the carrier transfer carriage 3 is placed on the mounting table 61 and the temporary mounting table 2. The hoop 8 (the flange portion 82 of the hoop 8) is made lower than the upper surface level h1.

  Note that there may be a plurality of load ports 6 (mounting table 61) and a plurality of temporary mounting tables 2. Here, the bottom surface level H1 of the hoop 8 when the hoop 8 is lifted is lower than the top surface level h1 of the hoop 8 placed on the mounting table 61 and the temporary mounting table 2, respectively. This means that the bottom surface level H1 is lower than the highest surface level h1 among the top surface levels h1 of the hoops 8 placed on the mounting table 61 and the temporary mounting table 2.

  The bottom level H1 of the hoop 8 when the hoop 8 is lifted is determined by the installation level of the traveling rail 41, the lift amount of the lift device 32 of the carrier transfer carriage 3, and the like.

  In this embodiment, the upper surface level of the mounting table 61 and the upper surface level of the temporary mounting table 2 are equal, but the upper surface level of the mounting table 61 and the upper surface level of the temporary mounting table 2 may be different.

  Further, as shown in FIG. 6, the height of the hoop 8 lifted from the mounting table 61 (or the temporary mounting table 2) (the mounting table 61 (or the temporary mounting table 2 when the hoop 8 is lifted by the carrier transfer cart 3). )) And the bottom surface of the hoop 8) are preferably as small as possible.

  As described above, according to the carrier transfer promoting device 1, the hoop 8 can be transferred using the space above the mounting table 61 of the load port 6. As a result, there is no need to incorporate a carrier transfer device into the load port itself (inside) as in the prior art, and a carrier transfer promotion device (carrier transfer device) can be retrofitted. That is, the existing load port can be used as it is.

  Here, in the transport system for one-way transport using OHT described in Patent Document 1, one load port and one relay unit are arranged adjacent to each other. On the other hand, the load port and the relay unit are determined on the front side (the side on which the carrier is placed). Therefore, one set of transport systems (one load port, one relay unit, and one carrier transfer device) has left and right sides.

  However, as described above, the carrier transfer promotion device 1 can be retrofitted to an existing load port. That is, in the transport system for one-way transport using OHT, the temporary placement table 2 of the carrier transfer promotion device 1 can be appropriately disposed on the upstream side or the downstream side of the existing load port (easy transfer). There is no problem of selfishness (extensibility is excellent).

  In the above embodiment, the unprocessed hoop 8 is first mounted on the mounting table 61 of the load port 6 by the OHT 7, and then the processed hoop 8 is moved from the mounting table 61 to the temporary mounting table 2. Although an example of transferring by the carrier transfer carriage 3 has been shown, first, an unprocessed hoop 8 is temporarily placed on the temporary placement table 2 by the OHT 7, and then the unprocessed hoop 8 is placed from the temporary placement table 2 to the placement table 61. It may be transferred by the carrier transfer carriage 3.

  In this case, when the OHT 7 attempts to place the hoop 8 on the temporary table 2, the carrier transfer cart 3 is positioned at a position avoiding the upper position of the temporary table 2 (in the above embodiment, according to the signal from the controller 5). , The upper position of the mounting table 61). The unprocessed hoop 8 is a hoop 8 in a state where an unprocessed semiconductor substrate or the like is stored.

  In the above-described embodiment, the example in which the temporary mounting table 2 is arranged on the downstream side in the transport direction of the FOUP 8 from the mounting table 61 (load port 6) is shown. The temporary table 2 may be arranged on the upstream side in the transport direction.

  Also in this case, first, an unprocessed hoop 8 is temporarily placed on the temporary table 2 by the OHT 7, and then the unprocessed hoop 8 is transferred from the temporary table 2 to the table 61 by the carrier transfer carriage 3. On the contrary, first, the unprocessed hoop 8 is placed on the placing table 61 of the load port 6 by the OHT 7, and then the treated hoop 8 is moved from the placing table 61 to the temporary placing table 2. You may transfer by the carrier transfer trolley 3 up.

  What is common is that the carrier transfer carriage 3 is moved to a position avoiding the upper position of the mounting table 61 or the temporary mounting table 2 during the transfer of the hoop between the mounting table 61 or the temporary mounting table 2 and the OHT 7 by the controller 5. The operation of the carrier transfer carriage 3 is controlled so as to be retracted to avoid contact between the carrier transfer carriage 3 and the hoop.

(Modification of carrier transfer promotion device)
A modified example of the carrier transfer promoting device 1 according to the first embodiment will be described with reference to FIG. In the description of the carrier transfer promoting device 101 according to this modification, differences from the carrier transfer promoting device 1 according to the first embodiment will be mainly described. In FIG. 7, the temporary table 2 and the controller 5 are not shown.

  As shown in FIG. 7, the carrier transfer promotion device 101 according to this modification further includes a caster 43 and an area sensor 44.

  In this modification, four casters 43 are respectively attached to the lower ends of the four leg members 42. In addition, area sensors 44 are attached to the two leg members 42 that face the hoop conveyance direction when set to the load port 6.

  By attaching the caster 43 to the lower end of the leg member 42, the self-supporting carrier transfer promoting device 101 that can run can be obtained, and application to an existing load port becomes easier. Further, by providing the area sensor 44, it is possible to detect the operator's entry into the inner space of the carrier transfer promotion device 101 where the hoop is moved up and down by the OHT 7 and the hoop is moved laterally by the carrier transfer carriage 3. Can prevent accidents such as injuries. In addition, the area sensor 44 can be easily attached by making the support member 4 have a casing structure. The carrier transfer device described in Patent Document 1 has a problem that it is difficult to attach an area sensor that emits a beam that reaches the end of the carrier transfer device.

(Second Embodiment)
Next, a carrier transfer promotion device 201 according to the second embodiment will be described with reference to FIG. In the description of the present embodiment, differences from the first embodiment will be mainly described.

  As shown in FIG. 8, the carrier transfer promoting device 201 according to the present embodiment is configured such that the temporary placement tables 2a and 2b are located on both sides of two adjacent load ports 6a and 6b, respectively. The temporary placement table 2a and the temporary placement table 2b are disposed adjacent to the load port 6a and the load port 6b, respectively. As with the carrier transfer promoting device 1 according to the first embodiment, the level of the bottom surface of the hoop 8 (the main body of the hoop 8) when the hoop 8 is lifted by the carrier transfer cart 3 is the mounting table of the load port 6. And it is comprised so that it may become lower than the upper surface level of the hoop 8 (the flange part of the hoop 8) in the state put on the temporary mounting base 2. FIG.

  Below, the outline | summary is demonstrated about an example of the conveyance flow of the FOUP 8 using the carrier transfer promotion apparatus 201. FIG.

  First, the OHT 7 temporarily places the hoop 8 on the temporary table 2a (step (1)) and moves downstream in the transport direction (step (2)) (loading of the adjacent load port 6a on the downstream side in the transport direction). Move above the cradle). Here, it is assumed that another processed FOUP 18 is already placed on the placement table of the load port 6a.

  When the OHT 7 tries to temporarily place the hoop 8 on the temporary table 2a, the carrier transfer carriage 3 is retracted to a position avoiding the upper position of the temporary table 2a by a signal from the controller 5. In the present embodiment, the carrier transfer cart 3 is retracted to a position above the mounting table of the load port 6b.

  Next, the OHT 7 that has moved above the mounting table of the load port 6a pulls up the hoop 18 on the mounting table, and then transports the hoop 18 to a predetermined position (step (3)). Also in this example, it is possible to place a hoop (place a hoop (step (1))) and pick (receive a hoop (step (3))) with a single movement of the OHT 7, and the number of load ports is large. The hoop conveyance waiting time can be shortened without adopting an apparatus (the same applies to the third embodiment described later).

  On the other hand, the controller 5 controls the carrier transfer cart 3 so as to transfer the unprocessed hoop 8 on the temporary table 2a onto the load table 6a (step (4)). Thereby, the transfer of the hoop 8 is performed.

  According to the carrier transfer promoting device 201 according to the present embodiment, the height at which the carrier transfer cart 3 travels (in other words, the height of the travel rail 41) can be kept low. As a result, the height of the carrier transfer promotion device 201 can be kept low overall, and a compact carrier transfer promotion device can be obtained. Further, since the amount of lifting of the hoop is small, the operation time of the carrier transfer cart 3 can be shortened, and as a result, the waiting time for transporting the hoop to the load port 6 can be further shortened.

(Third embodiment)
Next, a carrier transfer promotion device 301 according to the third embodiment will be described with reference to FIG. In the description of the present embodiment, differences from the first embodiment will be mainly described.

  As shown in FIG. 9, the carrier transfer promotion device 301 according to the present embodiment is provided so as to surround all the (five) load ports 6 a to 6 e arranged adjacent to each other. . The temporary placement table 2 on which the FOUP 8 is temporarily placed is disposed so as to be positioned on the downstream side of the load port 6e so as to be adjacent to the load port 6e on the most downstream side.

  Note that the temporary table 2 may be disposed between any of the load ports 6a to 6e (there may be a temporary table between the load ports), or the most upstream load port. Temporary placement table 2 may be arranged so as to be located upstream of load port 6a so as to be adjacent to 6a.

  The difference between the carrier transfer promoting device 1 according to the first embodiment and the carrier transfer promoting device 301 according to the present embodiment is not only the length of the traveling rail 41 due to the difference in the number of load ports, but also the carrier transfer promoting device 301. The height of the hoop 8 lifted by the carriage 3 is in the height. In the present embodiment, the bottom surface level H2 of the hoop 8 (the main body 81 of the hoop 8) when the hoop 8 is lifted by the carrier transfer carriage 3 is placed on the mounting table and the temporary mounting table 2 of the load port 6. It is set higher than the upper surface level h1 of the hoop 8 in the state (the flange portion 82 of the hoop 8).

  Furthermore, the bottom surface level H2 of the hoop 8 when the hoop 8 is lifted is higher than the top surface level h1 of the hoop 8 placed on the mounting table and the temporary mounting table 2 of the load port 6. Is that the bottom surface level H2 is higher than the top surface level h1 of the highest level among the top surface levels h1 of the hoops 8 placed on the mounting tables and the temporary mounting table 2 of the load ports 6a to 6e. Say. In the present embodiment, the upper surface level of the mounting table of each load port 6a to 6e and the upper surface level of the temporary mounting table 2 are equal.

  The bottom level H1 of the hoop 8 when the hoop 8 is lifted is determined by the installation level of the traveling rail 41, the lift amount of the lift device 32 of the carrier transfer carriage 3, and the like.

  According to the carrier transfer promoting device 301 according to the present embodiment, the hoop 8 can be moved laterally over another hoop positioned on the loading table of the load port 6. As a result, even if a plurality of existing load ports are arranged next to each other, carriers can be transferred between all load ports and temporary placement tables, and the carrier transport waiting time to the load ports Can be further shortened. Further, in the carrier transfer promoting device 301 according to the present embodiment, the bottom surface level H2 of the hoop 8 when the hoop 8 is lifted is higher than the top surface level h1 of the hoop 8 in the placed state. It is easy to apply to existing load port groups arranged adjacent to each other.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims. .

1: Carrier transfer promotion device 2: Temporary placement table 3: Carrier transfer vehicle 4: Support member 5: Controller 6: Load port 7: OHT (carrier transport means)
8: Hoop (carrier)
61: Mounting table

Claims (5)

An OHT that can run along a rail arranged on the ceiling side and that can be raised and lowered with a hoist part that supports the hoop, and can move the hoop between the load port provided on the floor side,
A carrier transport system provided with a temporary placement table for temporarily placing a hoop disposed below the OHT and transferred to the load port;
The temporary mounting table is arranged at a position different from the load port in the OHT traveling direction and at a position different from the loading port mounting table in the vertical direction ,
The OHT is configured to be able to transfer a hoop to the load port by raising and lowering the hoist while the load port is stopped at a load port stop position set at a position overlapping with the load port in the vertical direction. And, it is configured to be able to transfer a hoop to the temporary table by moving the hoist part up and down while stopped at the temporary table stop position set at a position overlapping with the temporary table.
A carrier transfer carriage that is provided with a lift that supports the hoop so that it can be raised and lowered, and is capable of transferring a hoop between the temporary table and the load port, with the OHT and the load port overlapping vertically. And a load port transfer position for transferring the hoop to and from the load port, a temporary table transfer position for transferring the hoop to and from the temporary table, and the OHT between the load port and the load port. Interference with the hoist part and the hoop when the OHT is transferred to and from the temporary placement table, and the retracted position at the time of transfer to avoid interference with the hoist part and the hoop when transferring the hoop. Is provided so as to be movable along the traveling direction at a height between the load port and the OHT over a retracted position during temporary placement to avoid
A traveling rail that supports the carrier transfer carriage and guides the movement along the traveling direction is provided,
The traveling rail forms a space through which the hoist part and the hoop can pass in the vertical direction when the OHT in a state stopped at the load port stop position and the temporary table stop position transfers the hoop. The carrier transport system that is configured to.   The traveling rail is composed of a pair of rail members arranged at intervals in the lateral width direction of the carrier transfer carriage in a state where the hoist part supporting the hoop forms a gap that can pass in the vertical direction. The carrier transport system according to claim 1. The load port transfer position and the temporary placement table transfer position are set adjacent to each other in the traveling direction,
A controller for controlling the movement operation of the carrier transfer cart,
When the OHT transfers a hoop to or from the load port, the carrier transfer carriage is made to wait at the temporary placement table transfer position as the retreat position at the time of transfer, and
When the OHT transfers the hoop to and from the temporary placement table, the carrier transfer cart is moved to stand by at the load port transfer position as the temporary transfer retracted position. The carrier conveyance system according to claim 1 or 2 constituted so that control may be carried out. The carrier transfer cart is configured to freely support a hoop suspended by the lift,
The temporary mounting table is configured to be capable of mounting and supporting the hoop so that the upper end of the supporting hoop is positioned below the lower end of the hoop supported by the lift in the carrier transfer carriage. Item 4. The carrier conveyance system according to Item 3. A plurality of load port transfer positions are set in a state of being aligned along the traveling direction,
The temporary table is provided corresponding to both one side and the other side in the traveling direction of the plurality of load port transfer positions,
The temporary table transfer position is set on both one side and the other side in the traveling direction of the plurality of load port transfer positions,
A plurality of the load port stop positions are set in a state where the load port stop positions overlap vertically with the plurality of load port transfer positions in a state of being aligned along the traveling direction,
The carrier transport system according to any one of claims 1 to 4, wherein the temporary placement table stop positions are set on one side and the other side in the traveling direction of the plurality of load port stop positions.