Source: https://patents.google.com/patent/CN102530553B/en
Timestamp: 2020-04-03 11:54:54
Document Index: 231120341

Matched Legal Cases: ['art 25', 'art 25', 'art；25', 'art；26', 'art；27', 'art；34', 'art；72', 'arts 24', 'art 25', 'art 25', 'art 25', 'art 25', 'art 26', 'art 31', 'art 30', 'art 26', 'art 31', 'art 25', 'art 25', 'art 25', 'art 26', 'art 26', 'art 25', 'art 26', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 70', 'art 71', 'art 71', 'art 70', 'art 70', 'art 70', 'art 70', 'art 70', 'art 70', 'art 70', 'art 70', 'art 70', 'art 70', 'art 71', 'art 70', 'art 70', 'art 70', 'art 71', 'art 70', 'art 70', 'art 70', 'art 70', 'art 70', 'art 70', 'art 25', 'art 25', 'art 25', 'art 26', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 25', 'art 70', 'art.\n4', 'art.\n7']

CN102530553B - Conveyer and transport method - Google Patents
Conveyer and transport method Download PDF
CN102530553B
CN102530553B CN201110338937.6A CN201110338937A CN102530553B CN 102530553 B CN102530553 B CN 102530553B CN 201110338937 A CN201110338937 A CN 201110338937A CN 102530553 B CN102530553 B CN 102530553B
buffer part
CN201110338937.6A
CN102530553A (en
太田达司
福岛正纯
伊藤靖久
2010-11-04 Priority to JP2010247553 priority Critical
2010-11-04 Priority to JP2010-247553 priority
2011-08-30 Priority to JP2011-187120 priority
2011-08-30 Priority to JP2011187120A priority patent/JP5382470B2/en
2011-10-28 Application filed by 村田机械株式会社 filed Critical 村田机械株式会社
2012-07-04 Publication of CN102530553A publication Critical patent/CN102530553A/en
2016-06-29 Publication of CN102530553B publication Critical patent/CN102530553B/en
The present invention provides a kind of conveyer and transport method, it is possible to the not front surface of plugging handling device and reduce under top view the floor space shared by conveyer, and promptly takes out of article to processing unit feeding.Parallel with overhead conveyer track and in the lower section of overhead conveyer track, the interval orbit from the upstream side of the load port processing device to downstream and the top being configured at load port is set, travels for the interval chassis possessing elevator.It is provided with the first buffer part of the upstream side being arranged in the load port processing device in the bottom of interval orbit and is arranged in second buffer part in downstream, so that overhead waggon and interval chassis join article all freely.
Conveyer and transport method
The present invention relates to conveyer, particularly relate to not make the wait of process device supply the conveyer of conveyance article.
In recent years need the inspection device etc. not making semiconductor processing and quasiconductor to process device to wait, and the article such as FOUP (for transporting the hermetic type box body of semiconductor wafer) are supplied and conveyance to the load port (loadport) of these devices.It is proposed that there is following proposal: be arranged around buffer part (buffer) what process device, and in order to carry out buffer part and the conveyance processed between device, and additional carrying device is set.Such as in patent documentation 1 (JP2006-224944A), the track of overhead waggon (overheadtravellingvehicle) and top board space are configured multiple abreast, one side is set to distance conveyance use, the opposing party is set to short distance conveyance and uses.And the underface configuration buffer part of the track in distance conveyance, the underface configuration at the track of short distance conveyance processes the load port of device.The overhead waggon of distance conveyance joins article between buffer part, and the overhead waggon of short distance conveyance joins article between buffer part and load port.Therefore when the article required for processing device are transported to buffer part in advance, it becomes possible to carry out at a high speed the supply of article to process device.
It addition, from the taking out of of article of the load port processing device, utilize the overhead waggon that short distance transport to carry out with high speed.But, so, owing to arranging track abreast at identical height and position, therefore the floor space shared by conveyer can be increased under top view.
In patent documentation 2 (JP2005-150129A), arranging, at the front surface processing device, the buffer part possessing carrying device, overhead waggon joins article between buffer part, and the carrying device in buffer part joins article between load port.But the guidance panel etc. representing the display of operational situation, manual operation is set at the front surface processing device, because of buffer part, they can be blocked, therefore be not preferred.It is loaded further with mouth and not only uses auto-conveying apparatus, sometimes also take out of article with manually supplying, when with the front surface of buffer part covering treatment device, then become difficulty with manually carrying out carrying-in/carrying-out.
Patent documentation 1:JP2006-224944A
Patent documentation 2:JP2005-150129A
The problem of the present invention is in that, not plugging handling device front surface and under top view floor space shared by conveyer reduce, and promptly to processing unit feeding and taking out of article.
The problem of the present invention also resides in, and reduces lifting amount when joining article between buffer part as far as possible.
The problem of the present invention also resides in, and shortens the conveying distance between buffer part and load port.
The problem added of the present invention is in that, it is provided that do not join the concrete structure of article between buffer part with interval (local) chassis interference and overhead waggon.
The present invention relates to a kind of conveyer, for transporting article between multiple process devices, this conveyer includes: overhead conveyer track, and it passes through on the top of the load port processing device；And overhead waggon, it to a direction running and possesses elevator along overhead conveyer track,
The system of the present invention is characterised by, including:
Interval orbit, it is arranged in above load port to downstream in the lower section of overhead conveyer track and along one direction from the upstream side of the load port processing device, and configures abreast with overhead conveyer track；
Interval chassis, it travels on described interval orbit, and possesses the elevator making article lift；
First buffer part, it is at the bottom of described interval orbit and the upstream side being arranged in the load port processing device along one direction, and makes overhead waggon join article all freely with interval chassis；And
Second buffer part, it is in the bottom of described interval orbit and the downstream being arranged in the load port processing device along one direction, and makes overhead waggon join article all freely with interval chassis.
In the invention, it is possible to the space travelled for overhead waggon is overlapped at vertical direction with the space travelled for interval chassis such that it is able to reduce the floor space shared by conveyer under top view.It addition, will not because of buffer part the front surface of plugging handling device.Owing to the first buffer part and the second buffer part are arranged at upstream side and the downstream of load port, therefore interval chassis promptly supply can take out of article between load port and buffer part.Load port can only arrange one on process device, it is also possible to arranges multiple.When arranging multiple load port, interval orbit arranges downstream from the upstream side of each load port, and the first buffer part is arranged on the upstream side of each load port, and the second buffer part is arranged on the downstream of each load port.
The conveyer of the overhead delivery wagon set it is installed on after the invention still further relates to,
The system is characterized in that, including:
Interval orbit, it is arranged in above load port to downstream from the upstream side of load port processing device in the lower section of overhead conveyer track and along a direction of described overhead conveyer track, and configures abreast with overhead conveyer track；
So, it is possible to the conveyer being made up of interval orbit, interval chassis and first, second buffer part is installed after on the overhead delivery wagon set.And the rear conveyer installed is without to processing plant modification, even if to the overhead delivery wagon set, also only need to carry out the transformation of dual-purpose pillar degree.It addition, the space travelled for overhead waggon can be overlapped with the space in the vertical direction for interval chassis traveling, so will not because of buffer part the front surface of plugging handling device.Owing to the first buffer part and the second buffer part are arranged on upstream side and the downstream of load port, therefore interval chassis promptly supply can take out of article between load port and buffer part.
Preferably, the first buffer part and the second buffer part are configured to load singly respectively article.So, it is possible to adjoin with load port, two buffer part of total are configured at upstream side and downstream.
It is preferably, first buffer part and the second buffer part are configured in following height: when the first buffer part and the second buffer part are placed with article, the interval chassis of only non-supports articles can travel above the first buffer part and the second buffer part, when described first buffer part and the second buffer part do not load article, the interval chassis of supports articles and the interval chassis of non-supports articles all travel height freely above the first buffer part and the second buffer part.So, interval chassis can promptly shift article between buffer part.
Additionally, it is preferably, described first buffer part and the second buffer part respectively have the structure that the two-layer of the upper and lower is step-like, first buffer part and the second buffer part can load article respectively singly in the upper and lower, lower floor is configured in the side close to load port, upper strata is configured in distance load port side farther out, and described lower floor and described upper strata are configured in following height: unrelated with or without article mounting with lower floor, the interval chassis of supports articles and the interval chassis of non-supports articles are all freely by the top of lower floor, when upper strata is placed with article, only the interval chassis of non-supports articles travels freely above upper strata, when upper strata does not load article, the interval chassis of supports articles and the interval chassis of non-supports articles all travel height freely above upper strata.So, it is possible to the upstream and downstream in load port configures the buffer part of the amount of four article, and interval chassis promptly can shift article to the buffer part on upper strata.
Additionally, it is preferred that be, interval orbit is made up of two parallel guide rails, and is provided with the gap vertically moved for article between two guide rails.So, even if interval orbit is arranged in the underface of the first track, overhead waggon also is able between load port and buffer part to join article.
It is preferably, overhead waggon carry out the article to described first buffer part and described second buffer part move into and from the taking out of of article of described load port, described interval chassis carries out the moving into the article of described load port from described first buffer part and described second buffer part.This control is performed by the controller etc. of the controller of overhead waggon and interval chassis.So, it is possible to promptly transport article from load port, and unrelated with or without article with in load port, all article are unloaded from overhead waggon to buffer part.And when the load port free time, it is possible to promptly article are moved into load port from buffer part.
It is preferably, the frame of the level of the top being arranged in load port supports the first buffer part and the second buffer part, frame is provided with the vertical view sensor of interferences for detecting load port side.By overlooking sensor so that the interference of the people etc. with load port side all will not occur for overhead waggon, interval chassis.Load port side refers near vicinity or the load port of load port.
It addition, the conveyer of the present invention is arranged: interval orbit, it is configured in the lower section of overhead conveyer track and above described load port, and configures abreast with overhead conveyer track；Interval chassis, it travels on described interval orbit, and possesses the elevator making article lift；And the buffer part that the two-layer with the upper and lower is step-like；Article can be loaded respectively singly in the upper and lower, lower floor is disposed in proximity to the side of load port, upper-layer configured is in distance load port side farther out, and described lower floor and described upper strata are configured in following height: unrelated with or without article mounting with lower floor, the interval chassis of supports articles and the interval chassis of non-supports articles all pass through freely above lower floor, when upper strata is placed with article, only the interval chassis of non-supports articles can travel freely above upper strata, when upper strata does not load article, the interval chassis of supports articles and the interval chassis of non-supports articles all travel height freely above upper strata.Such as, as step-like buffer part, at least one party of combination and the buffer part 25b, the combination of 26b of the buffer part 25a of Fig. 1,26a is set.
So, it is possible to the space travelled for overhead waggon is overlapped with the space in the vertical direction travelled for interval chassis, it is possible to reduce the floor space shared by conveyer under top view.It addition, will not because of buffer part the front surface of plugging handling device.Additionally, due to by buffer part with step-like configuration for upper and lower two-layer, therefore overhead waggon and interval chassis can carry out carrying-in/carrying-out relative to upper and lower any one layer, owing to the buffer part on upper strata and the difference in height level of interval orbit are less, therefore just can supply with less lifting amount and take out of article.
It addition, the present invention is used in processing the overhead conveyer track top of load port of device passed through and to a direction running and possesses the method that the overhead waggon of elevator transports article to load port along described overhead conveyer track, it is provided with
And perform following steps:
The step that article are unloaded by overhead waggon to the first buffer part or the second buffer part；
The step that the article of the first buffer part or the second buffer part are unloaded by interval chassis to load port；And
The step that the article of load port are taken out of by overhead waggon.
So, it is possible to promptly transport article from load port, and unrelated with or without article with in load port, article are unloaded from overhead waggon to buffer part.Further, when the load port free time, it is possible to promptly move into article from buffer part to load port.
Fig. 1 is the side view of the major part of the conveyer of embodiment.
Fig. 2 indicates that the conveyer from embodiment pulls down the top view of the major part of the state of the running rail of overhead waggon.
Fig. 3 indicates that the front view of the structure of interval chassis.
Fig. 4 indicates that the figure of the communication in conveyer.
Fig. 5 is the front view of the major part of the conveyer of variation.
Fig. 6 is the side view of the major part of the conveyer of most preferred embodiment.
Description of reference numerals is as follows: 2 ... conveyer；4 ... process device；6 ... load port；10 ... track；11 ... pillar；12 ... overhead waggon；14 ... elevator；16 ... lifting platform；18 ... article；20 ... interval orbit；22 ... interval chassis；23 ... lifting platform；24 ... lifting part；25a, 25b ... buffer part；26a, 26b ... buffer part；27,28 ... pillar；30,31 ... buffer part；34 ... gap；36 ... charging device；38 ... running vehicle wheel；40 ... running motor；42 ... accumulator；43 ... power device；44 ... elevator；45 ... chuck；50 ... overhead waggon controller；51～54 ... communication unit；60 ... interval orbit；62 ... interval chassis；63～65 ... guide wheel；67,68 ... pillar；70,71 ... buffer part；72 ... frame；73 ... controller；74 ... charging device；76 ... overlook sensor.
Hereinafter, expression is used for implementing highly preferred embodiment of the present invention.The scope of the present invention based on the record of claims, and with reference to the record of description and techniques known, should can determine according to the understanding of those skilled in the art.
Fig. 1～Fig. 5 represents that the conveyer of embodiment deforms with it.In the various figures, 2 is conveyer, and 4 is process device, for instance be the inspection device etc. of semiconductor processing device and quasiconductor.It addition, conveyer 2 is arranged in toilet.Process device 4 and possess one or more load port 6, at the track 10 being arranged above overhead waggon 12 processing device 4, utilize pillar 11 to support from top board.Overhead waggon 12 possesses elevator 14, so that lifting platform 16 and article 18 1 lifting.Article 18 are such as the FOUP holding semiconductor wafer, and the kind of article 18 is arbitrary.It addition, overhead waggon 12 is except elevator 14, it is also possible to the device possessing horizontal movement hoisting machine 14 and the device etc. making elevator rotate around vertical axes.Being constituted overhead delivery wagon by track 10 and overhead waggon 12, this system itself is known.
Such as arrange interval orbit 20 in the underface of track 10, interval orbit 20 is such as arranged at each process device.Positive top that the scope of interval orbit 20 is load port 6 and such as both sides around are set but it also may be load port 6 top with around in the middle of a side.22 is interval chassis, moves back and forth along interval orbit 20, and utilizes the lifting parts 24 such as band, steel wire, wirerope to make lifting platform 23 lift.Observing from load port 6, the travel direction such as front and back both sides at interval chassis 22 respectively arrange two kinds of buffer part 25a, 25b and 26a, 26b.Overhead waggon 12 travels along the direction of arrow of Fig. 1, for instance the buffer part 25a of upstream side, the 26a of a pair load port 6,6 is the first buffer part, and the buffer part 25b in downstream, 26b are the second buffer part.
Relief area 25a, 25b are arranged on and the interval chassis 22 being supported with article 18 can not be interfered by the height on its top, with load port 6 adjoining position when being arranged on top view.In other words, the bottom surface of the article 18 supported at interval chassis 22 and between the article mounting surface of relief area 25a, 25b, the difference in height of the amount of more than one article 18 is set.Relief area 26a, 26b are the second relief areas, the opposite side of load port 6 it is arranged at from relief area 25a, 25b when observing, and the interval chassis 22 being arranged on non-supports articles 18 can travel at an upper portion thereof, but the height that the interval chassis 22 being supported with article 18 cannot travel.In other words, the bottom surface of article 18 supported by interval chassis 22 and the difference in height between the article mounting surface of relief area 26a, 26b are set to the height of the amount less than article 18.Such as relief area 26a, 26b is arranged on the higher position of the height of the amount only exceeding article 18 than relief area 25a, 25b, and difference of height is constituted one layer of step with relief area 25a, 25b, 26a, 26b.And relief area 25a, 25b, 26a, 26b are supported by pillar 27,28, and pillar 27 such as also serves as the pillar of interval orbit 20 but it also may be provided separately with the pillar of interval orbit 20.
In an embodiment, the left and right sides (when with the travel direction of overhead waggon 12 for benchmark, the both sides, front and back of load port 6) of load port 6 is provided with buffer part 25a, 25b, 26a, 26b but it also may be positioned only at side.When the off-capacity of buffer part, with shown in chain-dotted line in Fig. 1, it is possible to make buffer part 26a, 26b move to the position of buffer part 31, arrange buffer part 30 in the bottom of original buffer part 26a, 26b.And in this case, interval orbit 20 also extends to the top of buffer part 31.
As described above, when configuring buffer part 25a, 25b, 26a, 26b etc., overhead waggon 12 and interval chassis 22 can at arbitrary buffer part 25a, join article 18 between 25b, 26a, 26b.Owing to buffer part 25a, 25b are positioned at relatively low position, though therefore overhead waggon 12 and interval chassis 22 are free to carry out carrying-in/carrying-out, but lifting amount during handing-over article 18 is bigger.When buffer part 26a, 26b are idle, the interval chassis 22 of actual loading can carry out carrying-in/carrying-out with the overhead waggon 12 of actual loading.When buffer part 26a, 26b are placed with article 18, unloaded interval chassis 22 can carry out carrying-in/carrying-out with unloaded overhead waggon 12.Additionally, overhead waggon 12 makes article 18 lift via the gap of the interval orbit 20 being made up of a pair running rail, refer to aftermentioned about this mechanism.
The above results makes interval chassis 22 and overhead waggon 12 can carry out carrying-in/carrying-out relative to buffer part 25a, 25b, 26a, 26b.Owing to buffer part 26a, 26b are positioned at higher position compared with buffer part 25a, 25b, therefore overhead waggon 12 and interval chassis 22 can shorten transfer time.Particularly interval chassis 22 can make lifting quantitative change during transfer article 18 short, it is possible to shortens transfer time.It is arranged near load port 6 additionally, due to buffer part 25a, 25b, 26a, 26b, therefore interval chassis 22 can with the short time at load port 6 and buffer part 25a, conveyance article 18 between 25b, 26a, 26b.
Fig. 2 is the figure of the II-II line observation downside along Fig. 1, removes overhead waggon 12 and track 10 and represents conveyer 2.Interval orbit 20 is made up of pair of tracks as shown in Figure 2, and interorbital is gap 34.The width in this gap 24 is more than the depth of article 18, and article 18 can vertically pass through gap.Additionally charging device 36 is set on the top of load port 6, for being charged to interval chassis 22.Fig. 1, Fig. 2 are the positive top of the load port 6 that charging device 36 is arranged in a side but it also may be arranged in the top of the load port of the opposing party or the pars intermedia etc. of a pair load port 6,6.
Overhead waggon 12, except processing the article that device 4 is immediately required to, is unloaded by article 18 with buffer part 25a, 25b, 26a, 26b.Additionally except the next one processes the article that are immediately required to of device, overhead waggon 12 takes out of the article in buffer part 25a, the article of 25b, 26a, 26b rather than load port 6.And load port 6 and buffer part 25a, conveyance between 25b, 26a, 26b are substantially undertaken by interval chassis 22.Its result, even if interval chassis 22 stops on the top of load port 6 due to charging, without the conveyance interfering the article undertaken by overhead waggon 12.In addition charging device 36 can also be arranged in the face of the position of buffer part 25a, 25b, 26a, 26b.In this case, when interval chassis 22 stops at this position for a long time due to charging, then overhead waggon 12 can be hindered to carry out carrying-in/carrying-out relative to buffer part.
Fig. 3 represents the structure of interval chassis 22,38 is running vehicle wheel, driven by running motor 40,42 is accumulator, it is charged by charging device 36 via power device 43, power supply to power device 43, for instance can be non-contact power, by adapter or charge connector etc. carry out contact charging any one.44 are an up machine, are used for making lifting platform 23 lift, and 45 is chuck, for the flange on article 18 top is held and discharged.
Fig. 4 represents the communication in conveyer, and overhead waggon controller 50 communicates with overhead waggon 12 and distributes conveyance instruction.Such as, charging device 36 also serves as the controller of interval chassis 22, communicates between overhead waggon controller 50 via communication unit 51, is thus reported in buffer part 25a, 25b, 26a, 26b to overhead waggon controller 50 upper with or without article 18 and ID thereof.Additionally charging device 36 receives from overhead waggon controller 50 and indicates about the conveyance via buffer part 25a, the article 18 of 25b, 26a, 26b.Communication unit 52 communicates with overhead waggon 12, carries out the overhead waggon 12 interlocking when buffer part 25a, handing-over article 18 between 25b, 26a, 26b.Communication unit 53 communicates with the communication unit 54 of interval chassis 22, indicates the transfer to interval chassis 22 of the article 18 between buffer part 25a, 25b, 26a, 26b and load port 6.
The action of conveyer 2 is illustrated.The target of conveyer is: supplied to load port 6 by article 18 in the moment that process device 4 needs just, when article 18 take out of from inside to load port 6, moves away to the outside processing device 4 immediately.As long as therefore having exclusive interval chassis 22 and buffer part 25a, 25b, 26a, 26b relative to process device 4.Article 18 needed for processing device 4 are held in buffer part 25a, 25b, 26a, 26b in advance, and transport to load port 6 in the moment required by process device 4.As long as it addition, the article 18 that will transport from inside to load port 6, shift to buffer part 25a, 25b, 26a, 26b immediately with interval chassis 22.And overhead waggon 12 carries out than buffer part 25a, 25b, 26a, 26b more by the conveyance in a distant place, overhead waggon 12 can carry out carrying-in/carrying-out relative to any one in buffer part 25a, 25b, 26a, 26b, it is also possible to carries out carrying-in/carrying-out directly with respect to load port 6 when urgent etc..
Sometimes, when processing device 4 needs, required article 18 are not but placed in buffer part 25a, 25b, 26a, 26b.In this case, when article 18 can directly be unloaded by overhead waggon 12 to load port, then can shorten the waiting time processing device 4.It addition, the conveyance of the article needed for the next one processes device postpones, when article 18 are directly moved away from by overhead waggon 12 from load port 6, then the next waiting time processing device can be shortened.
Owing to interval chassis 22 travels shorter distance along interval orbit 20, therefore simple chassis.And the communication as the charging device 36 of controller carries out in the following manner: such as the interval orbit 20 of conductor is doubled as holding wire, arranges feed line along interval orbit 20 or carry out radio communication etc. between chassis 22 and charging device 36.Further, towards the order wire between the power supply of charging device 36 and overhead waggon controller 50, it is possible to utilize pillar 27 etc. to connect up.
In an embodiment, though illustrating the example of the underface that interval orbit 20 is arranged in track 10, but it is not limited thereto.Fig. 5 represents such example, and the labelling identical with embodiment represents identical parts.60 is new interval orbit, and it is arranged in the lower section of track 10 in the way of avoiding the underface of track 10, and 62 is new interval chassis.Interval chassis 62 utilizes guide wheel 63～65 to be supported by interval orbit 60 and travel, and 67,68 is new pillar, and other aspects are identical with the embodiment of Fig. 1～Fig. 4.
Fig. 6 represents most preferred embodiment, and the labelling identical with Fig. 1～Fig. 4 represents identical parts, except the special aspect pointed out, identical with the embodiment of Fig. 1～Fig. 4.Overhead waggon 12 is along the arrow of Fig. 6 to a direction running.Processing device 4 and such as possess a pair load port 6,6, the travel direction at overhead waggon 12 and the upstream side in each load port 6,6 are provided with the first buffer part 70, and the downstream of each load port 6,6 is provided with the second buffer part 71.Additionally, the quantity of the load port 6 of each process device 4 is arbitrary.Interval orbit 20 extends to the top of second buffer part 71 in downstream from the top of the first buffer part 70 of the upstream side of load port 6,6.72 is the frame of level, pillar 27 support, and extends from the top of load port 6,6 to (upstream side and downstream) around, and supports buffer part 70,71.Buffer part 70,71 is configured in: the interval chassis 22 of non-supports articles 18 can travel up and be supported with the height that the interval chassis 22 of article 18 can not travel up.
Under top view, track 10 and track 20 overlap with buffer part 70,71, have load port 6,6 in the underface of track 10,20.It addition, track 20 is made up of two guide rails, there is the gap vertically passed through freely for article 18 between the guide rails.Along track 20, the stop position of interval chassis 22 such as has four positions, arranges the charging devices such as charge connector 74 in each position, thus being charged to electric storage means such as accumulator or double charge layer capacitor such as the lithium ion batteries of interval chassis.Owing to interval chassis 22 can accept the charging at any time of stopping, therefore can by the capacitor drive of the accumulator of low capacity or low capacity.Additionally due to the position of the surface of load port 6,6 is unsuitable for the position of readiness of interval chassis 22, therefore only charging device 74 can be set in the position of the surface of buffer part 70,71.
73 is controller, control interval chassis 22, and communicates with the overhead waggon controller 50 of overhead waggon 12 or Fig. 4.Frame 72 such as possesses a pair vertical view sensor (LookDownSensor) 76,76 on the top of load port 6,6, for the interferences near Supervision Loading mouth 6,6, for instance operator.Overlook sensor 76 such as, possess LASER Light Source, change laser direction and scan Fig. 6 dashdotted scope mechanism and reflection light photo-sensitive cell.And, for instance when the object in the dashdotted scope of watch circle 6 and when object being detected in dashdotted scope, then the transfer relative to interval chassis 22 and overhead waggon 12 of the corresponding load port 6 forbidden by controller 73.In addition it is also possible to overlook the multiple load port 6 of sensor monitoring with one.Additionally controller 73 directly can not also communicate with overhead waggon 12, and communicates via the overhead waggon controller 50 of Fig. 4.
The action of most preferred embodiment is illustrated.Article 18 are unloaded (moving into) by overhead waggon 12 to buffer part 70,71, and the article 18 in load port 6,6 are taken out of (loading).Available free in buffer part 70 and when load port 6 has article 18 that should take out of, the article 18 moved are unloaded by overhead waggon 12 to buffer part 70, and are taken out of from load port 6 by article 18.Therefore, it is possible to perform to move into and take out of with an overhead waggon 12.The article of buffer part 70,71 are moved into load port 6,6 by interval chassis 22.The position of readiness of interval chassis 22, on the top of buffer part 70,71, alternately changes position of readiness.Such as when the article in buffer part 71 are moved into load port 6, it is possible to standby in buffer part 70, then the article of buffer part 70 are promptly moved into load port 6.When in this external buffer part 70,71 all without article 18, it is also possible to standby in buffer part 71, so that article 18 can be unloaded by overhead waggon 12 to buffer part 70.When load port 6,6 likely occurs to overflow because of article 18, article can also be taken out of buffer part 70,71 from load port 6 by interval chassis 22.It addition, for extra urgent article, article can also directly be moved into load port 6 by overhead waggon 12.
In the preferred embodiment, buffer part 70,71 and load port 6,6 adjoin, and track 20 is less with the difference in height of buffer part 70,71.Therefore article 18 can be moved into load port 6 from buffer part 70,71 with the short time by interval chassis 22.For overhead waggon 12, with process device 4 possess two take out of special load port and two to move into special load port identical.Therefore, it is possible to reduce fault article 18 can not unloaded to load port 6.Additionally for processing device 4, it is possible to pile up at most the article of two pretreatment in buffer part 70,71.
Obtain following effect in an embodiment.
(1) can not the front surface of plugging handling device 4 and buffer part 25a, 25b, 26a, 26b are set.
(2) space travelled for overhead waggon 12 can be overlapped at vertical direction with the space travelled for interval chassis 22 such that it is able to reduce the floor space shared by conveyer under top view.
(3) owing to buffer part 25a, 25b, 26a, 26b are configured to upper and lower two-layer with stepped, therefore overhead waggon 12 and interval chassis 22 can carry out carrying-in/carrying-out relative to arbitrary buffer part 25a, 25b, 26a, 26b.Especially because the difference in height level between buffer part 26a, 26b and interval orbit 20 reduces, therefore can supply with less lifting amount and take out of article 18.
(4) owing to article 18 are by being arranged at the gap 34 of interval orbit 20, therefore interval orbit 20 and buffer part 25a, 25b, 26a, 26b can be arranged in the underface of the track 10 of overhead waggon 12.
(5) can not reforming processing device 4 and the overhead delivery wagon that set substantially, the conveyer being made up of interval orbit 20 and interval chassis 22 and buffer part 25a, 25b, 26a, 26b is then installed.
(6) owing to interval chassis 22 moves back and forth on shorter interval orbit 20, thus can at load port 6 and buffer part 25a, promptly supply between 25b, 26a, 26b and take out of article.Particularly when arranging buffer part 25a, 25b, 26a, 26b in the both sides, front and back of load port 6, it is possible to be arranged around multiple buffer part 25a, 25b, 26a, 26b in load port 6.
(7) when arranging charging device 36 on the top of load port 6, it is possible to do not interfere with overhead waggon 12 relative to buffer part 25a, 25b, 26a, 26b carrying-in/carrying-out, and the accumulator 42 of interval chassis 22 is charged.Further, since be that accumulator drives, therefore without being set up in parallel power supply rail with interval orbit 20.
Additionally, without arranging the system being made up of buffer part 70,71 and interval orbit 20 and interval chassis 22 at all of process device 4.For example, it is also possible to only arrange on the process device 4 that the treating capacity of article 18 is more.The kind of the article 18 of conveyance can be any, for instance, it is possible to it is the substrate etc. holding the box body of reticule of semiconductor exposure, flat faced display.
1. a conveyer, for transporting article between multiple process devices, this conveyer includes: overhead conveyer track, and it passes through on the top of the load port processing device；And overhead waggon, it to a direction running and possesses elevator along described overhead conveyer track, and this conveyer is characterised by, including:
Interval orbit, it is arranged in above load port to downstream in the lower section of described overhead conveyer track and along one direction from the upstream side of the load port processing device, and configures abreast with overhead conveyer track；
2. conveyer according to claim 1, it is characterised in that
Described first buffer part and described second buffer part are configured to load singly respectively article.
3. conveyer according to claim 1 and 2, it is characterised in that
Described first buffer part and described second buffer part are configured in following height: when described first buffer part and described second buffer part are placed with article, the interval chassis of only non-supports articles can travel above the first buffer part and the second buffer part, when described first buffer part and described second buffer part do not load article, the interval chassis of supports articles and the interval chassis of non-supports articles all travel height freely above the first buffer part and the second buffer part.
4. conveyer according to claim 1, it is characterised in that
The structure that two-layer that described first buffer part and described second buffer part respectively have the upper and lower is step-like, first buffer part and the second buffer part can load article respectively singly in the upper and lower, lower floor is configured in the side close to load port, upper strata is configured in distance load port side farther out, and described lower floor and described upper strata are configured in following height: unrelated with or without article mounting with lower floor, the interval chassis of supports articles and the interval chassis of non-supports articles are all freely by the top of lower floor, when upper strata is placed with article, the interval chassis of only non-supports articles travels freely above upper strata, when upper strata does not load article, the interval chassis of supports articles and the interval chassis of non-supports articles all travel height freely above upper strata.
5. conveyer according to claim 1 and 2, it is characterised in that
Described interval orbit is made up of two parallel guide rails, and is provided with the gap vertically moved for article between two guide rails.
6. conveyer according to claim 1 and 2, it is characterised in that
Described conveyer is also equipped with the unit controlling overhead waggon and interval chassis, so that overhead waggon carry out the article to described first buffer part and described second buffer part move into and from the taking out of of article of described load port, described interval chassis carries out the moving into the article of described load port from described first buffer part and described second buffer part.
7. conveyer according to claim 1 and 2, it is characterised in that
By the frame of the level of the top being arranged in load port to support described first buffer part and described second buffer part, described frame is provided with the vertical view sensor of interferences for detecting load port side.
8. a conveyer, is installed on the conveyer of the overhead delivery wagon set after being,
This conveyer is characterised by, including:
9. a conveyer, for transporting article between multiple process devices, this conveyer includes: overhead conveyer track, and it passes through on the top of the load port processing device；And overhead waggon, it to a direction running and possesses elevator along described overhead conveyer track,
This conveyer is characterised by, is provided with
Interval orbit, it is configured in the lower section of described overhead conveyer track and above described load port, and configures abreast with overhead conveyer track；
Interval chassis, it travels on described interval orbit, and possesses the elevator making article lift；And
There is the buffer part that the two-layer of the upper and lower is step-like,
Article can be loaded respectively singly on described upper strata and described lower floor, lower floor is disposed in proximity to the side of load port, upper-layer configured is in distance load port side farther out, and lower floor and upper strata are configured in following height: unrelated with or without article mounting with lower floor, the interval chassis of supports articles and the interval chassis of non-supports articles all pass through freely above lower floor, when upper strata is placed with article, only the interval chassis of non-supports articles can travel freely above upper strata, when upper strata does not load article, the interval chassis of supports articles and the interval chassis of non-supports articles all travel height freely above upper strata.
10. a transport method, is used in processing the overhead conveyer track top of load port of device passed through and to a direction running and possesses the method that the overhead waggon of elevator transports article to load port along described overhead conveyer track,
This transport method is characterised by, is provided with
Second buffer part, it is in the bottom of described interval orbit and the downstream being arranged in the load port processing device along one direction, and makes overhead waggon join article all freely with interval chassis,
This transport method performs following steps:
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