WO2009141976A1 - 天井搬送車 - Google Patents
天井搬送車 Download PDFInfo
- Publication number
- WO2009141976A1 WO2009141976A1 PCT/JP2009/002106 JP2009002106W WO2009141976A1 WO 2009141976 A1 WO2009141976 A1 WO 2009141976A1 JP 2009002106 W JP2009002106 W JP 2009002106W WO 2009141976 A1 WO2009141976 A1 WO 2009141976A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lid
- article
- foup
- prevention member
- drop prevention
- Prior art date
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 101
- 230000002265 prevention Effects 0.000 claims description 126
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000003860 storage Methods 0.000 claims description 17
- 230000003028 elevating effect Effects 0.000 claims description 7
- 230000032258 transport Effects 0.000 description 37
- 235000012431 wafers Nutrition 0.000 description 10
- 239000004065 semiconductor Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67703—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations between different workstations
- H01L21/6773—Conveying cassettes, containers or carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B3/00—Elevated railway systems with suspended vehicles
- B61B3/02—Elevated railway systems with suspended vehicles with self-propelled vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
- B65G1/02—Storage devices
- B65G1/04—Storage devices mechanical
- B65G1/0457—Storage devices mechanical with suspended load carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G37/00—Combinations of mechanical conveyors of the same kind, or of different kinds, of interest apart from their application in particular machines or use in particular manufacturing processes
- B65G37/02—Flow-sheets for conveyor combinations in warehouses, magazines or workshops
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C11/00—Trolleys or crabs, e.g. operating above runways
- B66C11/02—Trolleys or crabs, e.g. operating above runways with operating gear or operator's cabin suspended, or laterally offset, from runway or track
- B66C11/04—Underhung trolleys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67703—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations between different workstations
- H01L21/67733—Overhead conveying
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67703—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations between different workstations
- H01L21/67736—Loading to or unloading from a conveyor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67763—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations the wafers being stored in a carrier, involving loading and unloading
- H01L21/67769—Storage means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/02—Articles
- B65G2201/0297—Wafer cassette
Definitions
- the present invention relates to a ceiling transport vehicle, and more particularly to a ceiling transport vehicle that stores and transports a transportable article having a removable lid on its side surface in a suspended state.
- a ceiling transport system in which a ceiling transport vehicle is made to travel along a traveling rail provided on the ceiling to transport articles. ing.
- the overhead conveyance vehicle includes a traveling unit that travels along a traveling rail, an article storage unit that stores articles, and a hoist that can move the articles up and down.
- the hoist has a chuck for holding articles, a belt capable of moving the chuck up and down, and a belt drive mechanism capable of delivering and winding up the belt.
- FOUP Front Opening Unified Pod
- the FOUP is a sealed wafer storage pod.
- the FOUP comprises a cassette and a lid for closing the side opening of the cassette. The lid prevents particles from invading the interior and is positioning the wafer within the cassette.
- the overhead transport vehicle travels with the hoist moving the FOUP upward and being stored in the storage unit.
- the hoist moves the FOUP downward and places it on the load port table.
- the FOUP docks with the opening of the manufacturing device, and the FOUP opener then removes the lid from the FOUP cassette and pulls the lid into the interior of the device.
- the wafer is carried into the semiconductor manufacturing apparatus and predetermined processing is performed.
- the processed wafer is returned to the FOUP and the FOUP lid is closed.
- the overhead transport vehicle holds the FOUP placed on the table of the load port of the manufacturing apparatus by a hoist, raises it to the storage position, stores the FOUP, and starts traveling. In this way, the overhead vehicle moves the FOUP between the load ports.
- an unmanned conveyance may pass below the traveling rail, or a worker may move or work.
- a worker may move or work.
- the lid may fall from the FOUP, workers and other devices may be harmed.
- cover fall prevention member in the overhead conveyance vehicle is proposed (for example, refer patent document 1).
- the lid drop prevention member described in Patent Document 1 is fixed to the elevator and can move laterally with the elevator, but does not move in the other direction. Therefore, at the time of raising and lowering operation to lower the FOUP downward from the storage position or to move it upward from the port load, there is a possibility that the lifting platform or the FOUP may contact the lid drop preventing member. In particular, when the FOUP rises while shaking, the FOUP is likely to collide with the lid fall prevention member. When the two come in contact with each other, the overhead carriage shakes and the wafer in the FOUP receives an impact due to the shake. In addition, it is possible that the traveling vehicle which has swung collides with another traveling vehicle.
- An object of the present invention is to provide a ceiling transport vehicle in which a transport article is less likely to collide with the lid drop prevention member when moving up and down.
- the overhead conveyance vehicle is a ceiling conveyance vehicle which stores and conveys a conveyance article suspended with a lid provided on its side surface in a suspended state, and includes a conveyance vehicle main body, an elevating mechanism, and lid fall prevention A member and a first retracting mechanism are provided.
- the lifting and lowering mechanism is provided on the carrier body and is capable of lifting and lowering the conveyed articles.
- the lid drop prevention member is disposed close to the front of the lid.
- the first retracting mechanism retracts the lid fall preventing member from the front of the lid when moving up and down the transported article.
- the lid drop prevention member is disposed close to the front of the lid.
- the lid drop preventing member retracts the lid drop preventing member from the front of the lid. As a result, it is difficult for the conveyed article to collide with the lid drop prevention member when moving up and down.
- the overhead transport vehicle preferably includes a transport article drop prevention member, a second retraction mechanism, and a drive mechanism.
- the transported article drop prevention member is disposed below the storage position of the transported article.
- the second retracting mechanism retracts the transport article drop prevention member from below the storage position of the transport article when moving the transport article up and down.
- the drive mechanism drives both the first retraction mechanism and the second retraction mechanism.
- the transported article drop prevention member is disposed below the storage position of the transported article. Therefore, even if the conveyed article is removed from the elevating mechanism, the conveyed article is less likely to fall downward.
- the second retraction mechanism retracts the transported article drop prevention member from the lower side of the transported article.
- the conveyed article is less likely to collide with the conveyed article fall prevention member.
- the drive mechanism drives both the first retraction mechanism and the second retraction mechanism, it is not necessary to use a plurality of power sources.
- the lid drop prevention member is a member rotatable between the drop prevention position and the withdrawal position
- the conveyed article drop prevention member is a member rotatable between the drop prevention position and the withdrawal position. preferable.
- the lid drop prevention member and the transport article drop prevention member are rotatable, the lid and the transport article can be more reliably prevented from dropping.
- first retraction mechanism and the second retraction mechanism are connected via a power transmission unit for changing the rotational direction between the two.
- first retraction mechanism and the second retraction mechanism are connected via the power transmission unit, and are driven by a common power source.
- the first retraction mechanism and the second retraction mechanism can be driven with a small number of parts.
- the power transmission unit transmits power to the first shaft provided at the rotation center of the lid drop prevention member, the second shaft provided at the rotation center of the conveyed article fall prevention member, and the first shaft and the second shaft. It is preferable to have a pair of bevel gears that can be connected. In this overhead transportation vehicle, the driving force is transmitted from the first shaft to the second shaft via the pair of bevel gears.
- the lid fall prevention member is preferably a pair of members disposed apart in the vertical direction.
- the drive mechanism preferably includes a rotational drive unit and a link mechanism having a pair of link members for transmitting the drive force from the rotational drive unit to the pair of fall preventing members.
- the pair of fall prevention members are simultaneously driven by the link mechanism.
- the first retraction mechanism retracts the lid drop prevention member from the front of the lid. As a result, it is difficult for the conveyed article to collide with the lid drop prevention member when moving up and down.
- FIG. 1 is a schematic view of an overhead traveling car system 1 according to a non-contact power feeding method using a feeder line.
- the overhead traveling vehicle system 1 is provided in a clean room of a semiconductor factory or the like, and transports a FOUP (Front Opening Unified Pod) described later.
- the overhead traveling vehicle system 1 mainly includes a rail 3 and an overhead traveling vehicle 5 traveling along the rail 3.
- the configuration in the semiconductor factory will be described.
- the semiconductor factory has a plurality of bays (processes), and interbay routes 51 are provided to connect remote bays, and each bay has an intrabay route 53.
- Each of the routes 51 and 53 is constituted by a rail 3.
- a plurality of processing devices 55, 55 such as semiconductor processing devices are arranged.
- a load port 57 is provided in the vicinity of the processing devices 55, 55.
- the load port 57 is provided immediately below the intra-bay route 53.
- the overhead traveling vehicle 5 travels the rail 3 to transport the FOUP to be described later between the load ports 57.
- the rail 3 is suspended from the ceiling 9 by a plurality of columns 7 as shown in FIG.
- the rail 3 mainly includes a traveling rail 11 and a feed rail 13 provided below the traveling rail 11.
- the traveling rail 11 is made of, for example, aluminum, and as shown in FIG. 3, is formed in an inverted U shape in cross section, and has an upper surface portion 11a and both side surface portions 11b. Under the both side surface portions 11b, a pair of first traveling surfaces 11c extending inward are formed. Furthermore, a second traveling surface 11d is formed on the upper portion of the inner side surface of the both side surface portions 11b, and a third traveling surface 11e is formed on the lower side surface of the upper surface portion 11a.
- the feeding rail 13 mainly includes a pair of feeding line holders 15 provided on both sides of the lower part of the traveling rail 11.
- a power supply (not shown) is provided at one end of the feed line 17 so that a high frequency current is supplied to the pair of feed lines 17.
- the overhead traveling vehicle 5 mainly includes a traveling unit 21, a power receiving unit 23, and an elevation driving unit 25.
- the traveling unit 21 is a mechanism that is disposed in the traveling rail 11 and travels on the rail 3.
- the power receiving unit 23 is a mechanism that is disposed in the feed rail 13 and is supplied with power from the pair of feed lines 17 and 17.
- the elevation drive unit 25 is a mechanism disposed below the feed rail 13 for holding the FOUP 4 and vertically moving it up and down.
- the traveling part 21 is mainly disposed in the traveling rail 11, and includes a pair of first guide wheels 18 and 18, a pair of second guide wheels 19 and 19, and a traveling drive wheel 20. , And a motor 22.
- the pair of first guide wheels 18, 18 are disposed on both sides of the lower portion of the traveling portion 21 and rotatably supported by an axle extending in the left-right direction.
- the first guide wheels 18, 18 are placed on the first traveling surface 11 c of the traveling rail 11.
- the second guide wheels 19 and 19 are disposed on both upper sides of the traveling portion 21 and rotatably supported by vertically extending axles.
- the second guide wheels 19, 19 prevent the positional deviation in the lateral direction (the left and right direction in the traveling direction) with the second traveling surface 11d of the traveling rail 11 as a guide surface.
- the traveling driving wheel 20 is disposed substantially at the center of the traveling portion 21 and pressed against the third traveling surface 11 e of the traveling rail 11 by a pressing unit such as a spring.
- the traveling drive wheels 20 are driven by a motor 22. As a result, the overhead traveling vehicle 5 travels on the rail 3.
- the power receiving unit 23 has a pair of pickup units 27 for obtaining electric power from the pair of feed lines 17, 17. Specifically, the pair of pickup units 27 are arranged side by side in the feed rail 13. Each pickup unit 27 includes a ferrite core 29 having a substantially E-shaped cross section, and a pickup coil 31 wound around the core 29. Specifically, the core 29 has protrusions 29a on both sides and a protrusion 29b in the middle between the two, and the pickup coil 31 is wound around the protrusion 29b in the center.
- a pair of feed lines 17, 17 held by the feed line holder 15 are respectively disposed between the projecting portions 29 a on both sides and the projecting portion 29 b in the center.
- a magnetic field generated by supplying a high frequency current to the pair of feed lines 17 acts on the pickup coil 31 to generate an induced current in the pickup coil 31.
- electric power is supplied contactlessly from the pair of feeders 17 and 17 to the pickup unit 27 to drive the traveling motor 22 and to supply electric power to the control device.
- the non-contact power feeding unit 33 is configured by the pair of feed lines 17 and 17 of the power feeding rail 13 and the power receiving unit 23 of the overhead traveling vehicle 5.
- the lifting drive 25 is mainly composed of the main body frame 35, the lateral feed portion 37, the ⁇ drive 39, the hoist main body 41, and the lifting platform 43. Is equipped.
- the main body frame 35 is a member fixed to the lower part of the power reception unit 23.
- a front frame 45 and a rear frame 47 are provided on the front and back of the main body frame 35.
- the front side frame 45 and the rear side frame 47 are members extending downward from the main body frame 35, and sandwich the transverse feeding portion 37, the ⁇ drive 39, the hoist main body 41, and the elevator 43 in the front and rear direction.
- the front side frame 45 and the rear side frame 47 have a housing having a space inside.
- a FOUP drop prevention mechanism and a lid drop prevention mechanism are housed in the housing (described later).
- the transverse feed section 37 can laterally feed the ⁇ drive 39, the hoist main body 41 and the elevator 43, for example, and can deliver the FOUP 4 with a side buffer (not shown) provided on the side of the rail 3. .
- the ⁇ drive 39 rotates the hoist main body 41 in the horizontal plane to facilitate the delivery of the FOUP 4.
- elevating means (not shown) for raising and lowering the elevating table 43 is provided.
- the elevating means is, for example, four sets of winding drums, and a belt 59 is wound around the winding drum.
- a lift 43 is attached to the end of the belt 59.
- FIG. 4 shows the belt 59 being unwound from the winding drum and the elevator 43 being lowered together with the FOUP 4.
- the FOUP 4 accommodates a plurality of semiconductor wafers inside, and a removable lid 4 a is provided on the front surface.
- a flange 49 is provided at the top of the FOUP 4, and the flange 49 is chucked by a lift 43
- the FOUP fall prevention mechanism 58 includes a conveyed article fall prevention member 61, and a drive mechanism 60 that rotates the conveyed article fall prevention member 61 between the fall prevention position and the retracted position.
- a conveyed article drop prevention member 61 for preventing the FOUP 4 from falling is disposed in front and rear.
- the transported article drop prevention members 61 are provided on the front side frame 45 and the rear side frame 47 in pairs, respectively.
- the FOUP 4 is disposed at the storage position, and the transported article drop prevention member 61 is at the drop prevention position below the FOUP 4.
- the FOUP 4 is moved downward from the storage position by the hoist main body 41, and the transported article drop prevention member 61 is at the retracted position retracted from below the FOUP 4.
- the drive mechanism 60 will be described using FIGS. 5 to 7.
- the drive mechanism 60 is provided on both the front frame 45 and the rear frame 47, only the drive mechanism 60 provided on the rear frame 47 will be described here. 6 and 7, the left side of the drawing is the first side direction, and the right side of the drawing is the second side direction. Further, the right side of FIG. 5 and the lower side of FIG. 7 are front sides in the transport direction, and the left side of FIG. 5 and the top side of FIG. 7 are rear sides in the transport direction.
- the drive mechanism 60 mainly includes a motor 63, a gear member 65, and link members 67 and 69.
- the motor 63 is fixed to the first fixed plate 54 in the rear frame 47 and has a vertically extending rotation shaft.
- the rotating shaft of the motor 63 projects downward, and a gear 64 is provided at the tip thereof.
- the gear member 65 is a member rotatably supported by the first fixed plate 54 and has a rotation shaft 68 extending in parallel with the rotation shaft of the motor 63.
- a gear 66 is provided on the top of the gear member 65, and the gear 66 meshes with the gear 64 of the motor 63.
- the link members 67 and 69 constitute link mechanisms for driving the transportable article drop prevention members 61 and 61, respectively. Since the configuration and operation of the link members 67 and 69 are the same, only the link member 67 will be described.
- the link member 67 is a member for rotating the conveyed product drop prevention member 61 by the rotation of the gear member 65.
- the link member 67 as shown in FIG. 7, is an elongated plate-like member extending in the side direction, one end of which is rotatably connected to the first support portion 71 of the gear member 65, and the other end of which is a transport article drop prevention
- the second support portion 73 of the member 61 is rotatably supported.
- the first support portion 71 is disposed on the opposite side of the rotation shaft 68 of the gear member 65 with respect to the support portion of the link member 69, so that the link member 67 extends from the first support portion 71 to the gear member 65 It has a curved portion 67a which is curved so as to bypass the rotation shaft 68 rearward.
- the conveyed product fall prevention member 61 is composed of a fall prevention portion 61a, a rotation support portion 61b, and a wall portion 61c connecting the both.
- the fall prevention part 61a is a plate member extending in the horizontal direction, and extends relatively long. In addition, the corner of the fall prevention part 61a is chamfered and continues smoothly.
- the rotation support portion 61 b is a plate member which is disposed at a position higher than the fall prevention portion 61 a and extends in the horizontal direction.
- the shaft 81 is fixed to the rotation support portion 61 b, and the shaft 81 is rotatably supported by the second fixed plate 56 of the rear frame 47 around the rotation shaft 84.
- the position of the shaft 81 is slightly outside the center in the left-right direction in the conveyed product fall prevention member 61.
- the conveyed product fall prevention member 61 is pivotable between the fall prevention position indicated by the solid line and the retracted position indicated by the two-dot chain line in FIG. 7.
- the link member 69 realizes a point-symmetrical structure and operation with respect to the link member 67 around the rotation axis 68.
- the lid drop prevention mechanism 80 is composed of a lid drop prevention member 62 and a power transmission mechanism 82.
- lid fall preventing members 62 for preventing the lid 4a of the FOUP 4 from falling are disposed in the front and rear.
- One lid fall prevention member 62 is provided on each of the front frame 45 and the rear frame 47.
- the FOUP 4 is disposed at the storage position, and the lid drop prevention member 62 is at the drop prevention position in front of the lid 4 a of the FOUP 4.
- the FOUP 4 is moved downward from the storage position by the hoist main body 41, and the lid drop prevention member 62 is at the retracted position retracted from the front of the lid 4 a of the FOUP 4.
- the power transmission mechanism 82 is a mechanism for transmitting the driving force from the drive mechanism 60 of the above-described FOUP fall prevention mechanism 58 to the lid fall prevention member 62.
- the power transmission mechanism 82 mainly includes a first shaft 85, a first bevel gear (a bevel gear) 87, a second bevel gear (a bevel gear) 89, and a second shaft 91.
- the first shaft 85 is integrally rotated with the shaft 81 of the drive mechanism 60.
- the first shaft 85 is rotatably supported by the bearing 83 and further extends away from the shaft 81.
- the first bevel gear 87 is fixed to the tip of the first shaft 85.
- the rotation center of the first bevel gear 87 coincides with the rotation axis 84 of the first shaft 85.
- the second bevel gear 89 meshes with the side outer portion of the first bevel gear 87.
- the rotation axis of the second bevel gear 89 extends at a right angle to the rotation axis 84 of the first bevel gear 87.
- the second shaft 91 is fixed to the second bevel gear 89.
- the second shaft 91 is rotatably supported at its lateral inward (second lateral direction) end by the bearing 93, and the second bevel gear 89 is fixed to the lateral outward (first lateral side) end.
- a lid drop prevention member 62 is fixed to a tip protruding from there. As shown in FIG.
- the lid fall prevention member 62 extends in the side direction, and a portion from the middle portion to the tip projects from the rear side frame 47 and approaches the front side of the lid 4 a of the FOUP 4 It is arranged. As shown in FIG. 2, the lid drop prevention member 62 is disposed at a position corresponding to the lower portion of the lid 4 a (a portion below the center in the vertical direction). By the above operation, the lid fall prevention member 62 is pivotable between the fall prevention position indicated by the solid line and the retracted position indicated by the two-dot chain line in FIG. As is apparent from FIG.
- the extending direction of the second shaft 91 is inclined with respect to the side direction (not perpendicular to the front-rear direction), and therefore, the tip of the lid fall preventing member 62 is also closer than the root end. It inclines so that it may be located in the side direction outside (the 1st side side). However, as another embodiment, the extending direction of the second shaft may be parallel to the side direction, and the lid drop prevention member may be parallel to the front-rear direction.
- the conveyed product drop prevention member 61 pivots from the retracted position to the drop prevention position, and the lid drop prevention member 62 pivots from the retracted position to the drop prevention position.
- the conveyed product fall prevention member 61 and the lid fall prevention member 62 move between the fall prevention position and the retracted position at the same timing.
- the lid fall prevention member 62 and the power transmission mechanism 82 are provided.
- the lid drop prevention member 62 is disposed close to the front of the lid 4a.
- the power transmission mechanism 82 retracts the lid drop preventing member 62 from the front of the lid 4 a when the FOUP 4 is moved up and down.
- the lid fall preventing member 62 is disposed in the vicinity of the front of the lid 4a. Therefore, even if the lid 4a of the FOUP 4 is removed, the lid 4a is unlikely to fall downward.
- the power transmission mechanism 82 retracts the lid drop prevention member 62 from the front of the lid 4a.
- the FOUP 4 it is difficult for the FOUP 4 to collide with the lid fall prevention member 62 when moving up and down.
- the FOUP 4 hardly collides with the lid fall prevention member 62.
- the wafer in the FOUP 4 is less susceptible to shocks due to swinging.
- the overhead traveling vehicle 5 has a transported article drop prevention member 61 and a drive mechanism 60.
- the transported article drop prevention member 61 is disposed below the storage position of the FOUP 4.
- the drive mechanism 60 retracts the conveyed product drop prevention member 61 from below the storage position of the FOUP 4 when moving up and down the FOUP 4.
- the drive mechanism 60 includes a motor 63 which is a drive source, and a gear member 65 and a link member 67 for driving the conveyed product drop prevention member 61.
- the gear member 65, the link member 67, and the like also have a function of transmitting the power of the motor 63 to the power transmission mechanism 82.
- the conveyed article drop prevention member 61 is disposed below the storage position of the FOUP 4. Therefore, even if the FOUP 4 is detached from the elevation driving unit 25, it is difficult for the FOUP 4 to fall downward.
- the drive mechanism 60 retracts the transported article drop prevention member 61 from the lower side of the FOUP 4. As a result, it is difficult for the FOUP 4 to collide with the conveyed product falling prevention member 61 when moving up and down. In particular, even when the FOUP 4 rises while swinging, the FOUP 4 is less likely to collide with the transported article drop prevention member 61. As a result, the wafer in the FOUP 4 is less susceptible to shocks due to swinging.
- the lid drop prevention members 62 are a pair of members disposed on both sides (both sides in this embodiment in the front-rear direction) of the FOUP 4 and capable of rotating between the drop prevention position and the standby position.
- the conveyed product drop prevention members 61 are a pair of members disposed on both sides of the FOUP 4 and capable of rotating between the drop prevention position and the withdrawal position.
- the transportable article drop prevention members 61 are provided in a pair in the left-right direction in each of the front frame 46 and the rear frame 47, but one each is provided in the front frame 45 and the rear frame 47. It may be done.
- the lid drop prevention member 62 and the conveyed article fall prevention member 61 are respectively disposed on both sides of the conveyed article, the lid 4a and the FOUP 4 can be more reliably prevented from falling.
- the power transmission mechanism 82 and the drive mechanism 60 are connected via a first bevel gear 87 and a second bevel gear 89 for changing the rotational direction between the two.
- the power transmission mechanism of the power transmission mechanism 82 and the power transmission portion of the drive mechanism 60 are driven by the common motor 63.
- the power transmission mechanism 82 and the drive mechanism 60 can be driven with a small number of parts.
- the power transmission mechanism 82 includes a first shaft 85 provided at the rotation center of the lid fall prevention member 62, a second shaft 91 provided at the rotation center of the conveyed article fall prevention member 61, and the first shaft 85.
- the lid fall prevention member 62 is a pair of members which are disposed apart in the vertical direction.
- the drive mechanism 60 includes a motor 63 and a link mechanism having a pair of link members 67 and 69 for transmitting the drive force from the motor 63 to the pair of lid drop prevention members 62. As a result, the pair of lid drop prevention members 62 are simultaneously driven by the link mechanism.
- the traveling vehicle system in the clean room of the semiconductor manufacturing factory has been described in the above embodiment, the present invention is applicable to other types of factories.
- the conveyed article was FOUP, it may be another member.
- the present invention is widely applicable to an overhead traveling vehicle system traveling on a track.
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Abstract
Description
この天井搬送車では、搬送車本体が搬送物品を吊り下げた状態で搬送しているときには、蓋落下防止部材は蓋の正面に近接して配置されている。したがって、搬送物品の蓋が外れても蓋が下方に落下しにくい。一方、搬送車本体が停止してさらに昇降機構が搬送物品を昇降させるときには、第1退避機構が蓋落下防止部材を蓋の正面から待避させる。この結果、昇降時に搬送物品が蓋落下防止部材に衝突しにくい。
この天井搬送車では、搬送車本体が搬送物品を吊り下げた状態で搬送しているときには、搬送物品落下防止部材は搬送物品の収納位置の下方に配置される。したがって、搬送物品が昇降機構から外れても搬送物品が下方に落下しにくい。一方、搬送車本体が停止してさらに昇降機構が搬送物品を昇降させるときには、第2退避機構が搬送物品落下防止部材を搬送物品の下方から待避させる。この結果、搬送物品が搬送物品落下防止部材に衝突しにくい。
さらに、駆動機構が第1退避機構と第2退避機構の両方を駆動するため、複数の動力源を用いる必要がない。
この天井搬送車では、蓋落下防止部材と搬送物品落下防止部材とが回動可能であるため、より確実に蓋及び搬送物品の落下を防止できる。
この天井搬送車では、第1退避機構と第2退避機構が動力伝達部を介して連結されており、共通の動力源によって駆動される。この結果、少ない部品点数で第1退避機構と第2退避機構を駆動することができる
この天井搬送車では、駆動力は、第1シャフトから一対のかさ歯車を介して第2シャフトに伝達される。
この天井搬送車では、一対の落下防止部材がリンク機構によって同時に駆動される。
図1は、給電線を用いた非接触給電供給方式による天井走行車システム1の模式図である。天井走行車システム1は、半導体工場などのクリーンルームなどに設けられ、後述するFOUP(Front Opening Unified Pod)を搬送する。天井走行車システム1は、主に、レール3と、レール3に沿って走行する天井走行車5とを有している。
レール3は、図2に示すように、複数の支柱7によって天井9から吊り下げられている。レール3は、主に、走行レール11と、走行レール11の下部に設けられた給電レール13とを有している。
走行レール11は、例えばアルミ製であり、図3に示すように、断面視逆U字状に構成されており、上面部11aと、両側面部11bとを有している。両側面部11bの下には、内側に延びる一対の第1走行面11cが形成されている。さらに、両側面部11bの内側面の上部には第2走行面11dが形成され、上面部11aの下側面に第3走行面11eが形成されている。
給電レール13は、走行レール11の下部両側に設けられた一対の給電線ホルダ15,15から主に構成されている。給電線ホルダ15,15には、銅線などの導電線を絶縁材料で被覆しリッツ線からなる一対の給電線17,17が配置されている。給電線17の一端には電力供給装置(図示せず)が設けられ、一対の給電線17,17に高周波電流が供給されるようになっている。
天井走行車5は、主に、走行部21と、受電部23と、昇降駆動部25とを有している。走行部21は、走行レール11内に配置され、レール3上を走行するための機構である。受電部23は、給電レール13内に配置され、一対の給電線17,17から電力を供給されるための機構である。昇降駆動部25は、給電レール13の下方に配置され、FOUP4を保持すると共に上下に昇降させるための機構である。
走行部21は、主に、走行レール11内に配置されており、一対の第1ガイド輪18,18と、一対の第2ガイド輪19,19と、走行駆動輪20と、モータ22とを有している。一対の第1ガイド輪18,18は、走行部21の下部両側に配置され、左右方向に延びる車軸に回転自在に支持されている。第1ガイド輪18,18は、走行レール11の第1走行面11c上に載置されている。
受電部23は、一対の給電線17,17から電力を得るための一対のピックアップユニット27を有している。具体的には、一対のピックアップユニット27,27は、給電レール13内で左右に並んで配置されている。各ピックアップユニット27は、断面が略E字型をしたフェライト製のコア29と、コア29に巻かれたピックアップコイル31とを有している。具体的には、コア29は、両側の突出部29aと、その間の中央の突出部29bとを有しており、ピックアップコイル31は中央の突出部29bに巻かれている。
昇降駆動部(ホイスト)25は、図2に示すように、主に、本体フレーム35と、横送り部37と、θドライブ39と、ホイスト本体41と、昇降台43とを備えている。
FOUP4は、内部に複数の半導体ウェハを収容しており、前面に取り外し可能な蓋4aが設けられている。FOUP4の上部にはフランジ49が設けられており、フランジ49は昇降台43でチャックされている。
次に、FOUP落下防止機構58について説明する。FOUP落下防止機構58は、搬送物品落下防止部材61と、搬送物品落下防止部材61を落下防止位置と退避位置と回動させる駆動機構60とから構成されている。
次に、図5~図7を用いて、駆動機構60について説明する。なお、駆動機構60は前側フレーム45および後側フレーム47の両方に設けられているが、ここでは後側フレーム47に設けられた駆動機構60のみを説明する。なお、図6および図7において、図左側を第1側方向として、図右側を第2側方向とする。さらに、図5の図右側及び図7の図下側を搬送方向前側として、図5の図左側及び図7の図上側を搬送方向後側とする。
次に、蓋落下防止機構80について説明する。蓋落下防止機構80は、蓋落下防止部材62と、動力伝達機構82とから構成されている。
天井走行車5がFOUP4を搬送しているときには、図7に示すように搬送物品落下防止部材61が落下防止位置にあり、さらに図5に示すように蓋落下防止部材62が落下防止位置にある。これにより、例えば昇降台43のチャック機構からFOUP4が外れた場合やFOUP4のカセットから蓋4aが外れた場合でも、それらが下方に落下しにくい。このように、FOUP4や蓋4aの落下を防止できるため、レール3の下方への作業車の立ち入り規制を無くすことができる。このため、クリーンルームの有効利用が可能になる。
以上に述べたように、本発明に係る実施形態では、蓋落下防止部材62と、動力伝達機構82が設けられている。蓋落下防止部材62は、蓋4aの正面に近接して配置される。動力伝達機構82は、FOUP4の昇降時に蓋落下防止部材62を蓋4aの正面から待避させる。この天井走行車5では、FOUP4を吊り下げた状態で搬送しているときには、蓋落下防止部材62は蓋4aの正面に近接して配置されている。したがって、FOUP4の蓋4aが外れても蓋4aが下方に落下しにくい。一方、天井走行車5が停止してさらに昇降駆動部25がFOUP4を昇降させるときには、動力伝達機構82が蓋落下防止部材62を蓋4aの正面から待避させる。この結果、昇降時にFOUP4が蓋落下防止部材62に衝突しにくい。特に、FOUP4が揺れながら上昇してくる場合でも、FOUP4が蓋落下防止部材62に衝突しにくい。その結果、FOUP4内のウェハが揺動による衝撃を受けにくい。
動力伝達機構82は、蓋落下防止部材62の回動中心に設けられた第1シャフト85と、搬送物品落下防止部材61の回動中心に設けられた第2シャフト91と、第1シャフト85と第2シャフト91を動力伝達可能に連結する第1ベベルギア87および第2ベベルギア89とを有している。この結果、駆動力は、第1シャフト85から第1ベベルギア87および第2ベベルギア89を介して第2シャフト91に伝達される。
蓋落下防止部材62は、上下方向に離れて配置された一対の部材である。駆動機構60は、モータ63と、モータ63からの駆動力を一対の蓋落下防止部材62に伝達するための一対のリンク部材67、69を有するリンク機構とを有している。この結果、一対の蓋落下防止部材62がリンク機構によって同時に駆動される。
以上、本発明の一実施形態について説明したが、本発明は上記実施形態に限定されるものではなく、発明の要旨を逸脱しない範囲で種々の変更が可能である。
前記実施形態では、搬送物品はFOUPであったが、他の部材であっても良い。
3 レール
4 FOUP
4a 蓋
5 天井走行車
11 走行レール
13 給電レール
15 給電線ホルダ
17 給電線
21 走行部(搬送車本体)
23 受電部
25 昇降駆動部(昇降機構)
27 ピックアップユニット
29 コア
31 ピックアップコイル
33 非接触給電部
35 本体フレーム
37 横送り部
39 θドライブ
41 ホイスト本体
43 昇降台
45 前側フレーム
47 後側フレーム
58 FOUP落下防止機構
60 駆動機構(第2退避機構)
61 搬送物品落下防止部材
62 蓋落下防止部材
63 モータ
64 ギア
65 ギア部材
67 リンク部材
69 リンク部材
68 回転軸
71 第1支持部
73 第2支持部
80 蓋落下防止機構
81 シャフト
82 動力伝達機構(第1退避機構)
85 第1シャフト
87 第1ベベルギア
89 第2ベベルギア
91 第2シャフト
Claims (6)
- 側面に蓋が取り外し可能に設けられた搬送物品を吊り下げた状態で収納・搬送する天井搬送車であって、
搬送車本体と、
前記搬送車本体に設けられ、前記搬送物品を昇降可能な昇降機構と、
前記蓋の正面に近接して配置される蓋落下防止部材と、
前記搬送物品の昇降時に前記蓋落下防止部材を前記蓋の正面から待避させる第1待避機構と、
を備えた天井搬送車。 - 前記搬送物品の収納位置の下方に配置される搬送物品落下防止部材と、
前記搬送物品の昇降時に前記搬送物品落下防止部材を前記搬送物品の収納位置の下方から待避させる第2待避機構と、
前記第1待避機構と前記第2待避機構の両方を駆動するための駆動機構と、
をさらに備えた請求項1に記載の天井搬送車。 - 前記蓋落下防止部材は、落下防止位置と待避位置との間で回動可能な部材であり、
前記搬送物品落下防止部材は、落下防止位置と待避位置との間で回動可能な部材である、請求項2に記載の天井搬送車。 - 前記第1待避機構と前記第2待避機構は、両者間で回転方向を変更するための動力伝達部を介して連結されている、請求項3に記載の天井搬送車。
- 前記動力伝達部は、前記蓋落下防止部材の回動中心に設けられた第1シャフトと、前記搬送物品落下防止部材の回動中心に設けられた第2シャフトと、前記第1シャフトと前記第2シャフトを動力伝達可能に連結するかさ歯車とを有している、請求項4に記載の天井搬送車。
- 前記蓋落下防止部材は、上下方向に離れて配置された一対の部材であり、
前記駆動機構は、回転駆動部と、前記回転駆動部からの駆動力を前記一対の落下防止部材に伝達するための一対のリンク部材を有するリンク機構とを有している、請求項2~5のいずれかに記載の天井搬送車。
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KR1020107025602A KR101227918B1 (ko) | 2008-05-22 | 2009-05-14 | 천정반송차 |
US12/993,290 US8490802B2 (en) | 2008-05-22 | 2009-05-14 | Overhead conveying vehicle |
CN200980117729.4A CN102026858B (zh) | 2008-05-22 | 2009-05-14 | 天车 |
EP09750338.7A EP2277759B1 (en) | 2008-05-22 | 2009-05-14 | Overhead conveying vehicle |
JP2010512929A JP5035415B2 (ja) | 2008-05-22 | 2009-05-14 | 天井搬送車 |
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EP (1) | EP2277759B1 (ja) |
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KR (1) | KR101227918B1 (ja) |
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Also Published As
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KR101227918B1 (ko) | 2013-01-30 |
KR20110005867A (ko) | 2011-01-19 |
US8490802B2 (en) | 2013-07-23 |
EP2277759A4 (en) | 2012-12-19 |
CN102026858A (zh) | 2011-04-20 |
CN102026858B (zh) | 2013-06-26 |
JPWO2009141976A1 (ja) | 2011-09-29 |
EP2277759B1 (en) | 2016-12-21 |
EP2277759A1 (en) | 2011-01-26 |
TW201006751A (en) | 2010-02-16 |
JP5035415B2 (ja) | 2012-09-26 |
TWI457256B (zh) | 2014-10-21 |
US20110062103A1 (en) | 2011-03-17 |
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