CN1022397C - Conveyor system and conveying method thereof - Google Patents
Conveyor system and conveying method thereof Download PDFInfo
- Publication number
- CN1022397C CN1022397C CN 91100317 CN91100317A CN1022397C CN 1022397 C CN1022397 C CN 1022397C CN 91100317 CN91100317 CN 91100317 CN 91100317 A CN91100317 A CN 91100317A CN 1022397 C CN1022397 C CN 1022397C
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- conveyor line
- supporting plate
- product
- conveyor
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Abstract
To provide a conveyor system and a method of use thereof capable of facilitating a performance test in a condition in which the assembly of a product is completed after parts of the product are assembled while transferring them sequentially along a fixed transfer line.Transfer lines by means of a conveyor are provided at upper and lower steps, respectively, and the assembly work is done at two upper lines and a performance test for a product of which assembly is completed is easily done at two lower lines. Moreover, a pallet on which products are piled up at the performance test lines is easily transported to an adjacent line, and power supply to be applied on the product when the product is transported is continuously supplied to simplify the assembly line without increasing an installation area of a workshop and greatly improve the productivity.
Description
The present invention is relevant with conveyor system, concrete relevant a kind of be used for the part of electrical equipment or electronic product successively along one fixedly travel line assemble while carrying, then product assemble finish after, make properties of product test to be convenient to the conveyor system that carries out.
In traditional conveyor system of general type, conveyer chain or belt conveyor that some rollers are installed on it are arranged on the conveyer conveyor line of circular arrangement or straight line arrangement, the supporting plate of the various parts of some conveyings is installed on the roller, propulsive effort by motor rotates this chain or band, thereby constantly carries supporting plate.
Therefore, the operator is arranged at along on the position of travel line avris, and they assemble each parts of supporting plate transmission in proper order, to finish the manufacturing of product.Empty supporting plate after assembling finishes is carried by another conveyor line along the reversing sense of conveyor line, in order to supporting plate is used further to carry corresponding part.The product manufacturing is undertaken by repeating identical operation continuously.
In addition, in above-mentioned this conveyor system,, must after finishing, the product assembling in the given time, check the performance of product by test process such as the equipment such as sound equipment of the series products that laser disc player is installed on it.
But, in above-mentioned conveyor system, owing to have only component delivery conveyer conveyor line, the empty supporting plate that reaches after assembling is finished resupplies the setting of conveyer conveyor line at grade, and, owing to want the test products performance, must after transmitting product, test again with the conveyer conveyor line that is provided with respectively, so there is some problem, in the workshop, occupy excessively such as device area, and capacity rating is greatly reduced owing to production process is complicated.
US-2,640,580 and US-4,736,834 disclosed conveyor systems do not have to solve the problem of going up yet.
An object of the present invention is to propose a kind of conveyor system, transmit part, make it in the workshop, take seldom device area, and make part easy to assembly by travel line at two ends, conveyer upper strata, thereby, can increase productivity greatly.
Another object of the present invention is to propose a kind of conveyor system, can carry out performance testing at once after the product assembling finishes.
Another object of the present invention is to propose a kind of conveyor system, easily will above be placed with product supporting plate transmit to adjacent travel line, and when transmitting product, continue to its power supply.
In order to achieve the above object, the invention provides a kind of conveyor system that is used for assembling each part of carrying successively by the supporting plate of being arranged by straight line, it has:
Supporting plate is pressed predetermined direction carry, in order to first and second conveyor line of part stack-mounted, this two conveyor line is in the upper strata;
The the 3rd and the 4th conveyor line of test products performance, this two conveyor line are in the lower floor of this first and second conveyor line below;
Make supporting plate in the conveying make the operating control of intermittently stop or conveying, this operating control is provided with by predetermined interval on this conveyor line;
It is characterized in that this system also comprises:
Supporting plate on this conveyor line desired location is promoted, then the feedway of laterally transferring;
The supporting plate lifting that to carry along this conveyor line on the levels is so that selectively to the elevating transport apparatus of this transfer line supply respectively;
Be placed with the conveyer of the supporting plate of product above the transmission, this conveyer is located at the two ends of the 3rd and the 4th conveyor line;
Supply with the power supplier of the electric current that is used for the properties of product test to each line of the 3rd and the 4th conveyor line.
In addition, the present invention also provides a kind of carrying method, and it may further comprise the steps:
(a ') provides belt conveyor or the conveyer chain on a plurality of conveying rollers that are installed in the conveyer conveyor line;
(b ') transmits supporting plate in the component assembly position of conveyer conveyor line;
(c ') after product assembling is finished, give fix time in, check the performance of product;
It is characterized in that it is further comprising the steps of:
(a) with the top supporting plate that has been placed with part, carry along first conveyor line that is located at the conveyor system upper strata successively, then part is assembled;
(b) after the part assembling is finished,, the top supporting plate that is placed with product is carried to an elevating transport apparatus with a feedway that is located at desired location on second conveyor line;
(c) with elevating transport apparatus with the top supporting plate that has been placed with product, carry to the 3rd conveyor line that is located at this second conveyor line below successively;
(d) will be transported to the supporting plate of the 3rd conveyor line, with the 3rd conveyor line be located at the conveyer at the 4th conveyor line two ends of the 3rd conveyor line one side, via the 3rd and the 4th conveyor line circulation time, the performance of test products simultaneously;
(e) will be transported to the supporting plate of the 3rd conveyor line by the 4th conveyor line again, carry to this elevating transport apparatus;
(f) supporting plate of the product that top placement performance testing is finished is carried to this conveyor line with this elevating transport apparatus; And
(g) collect the empty supporting plate of carrying by this second conveyor line, it is carried to this first conveyor line, so that resupply.
Above-mentioned and other purpose of the present invention, characteristics and advantage from following narration about preferred embodiment, with reference to accompanying drawing, just can be known understanding, in the accompanying drawing:
Fig. 1 is the schematic perspective view of whole conveyor systems;
Fig. 2 (A) and 2(B) be the approximate vertical view of each conveyor line of conveyor system;
Fig. 3 is the transparent view of explanation conveyor system major part;
Fig. 4 is the diagrammatic, cross-sectional figure of conveyor system;
Fig. 5 (A) and 5(B) be respectively and overlook and cutaway view generally shows to be used for conveying roller that supporting plate is transmitted at conveyor system;
Fig. 6 is the general profile chart of explanation conveying roller operational relation in conveyor system;
Fig. 7 is the summary side elevation that is used for the bont of conveyor system;
Fig. 8 (A) and the summary that 8(B) is respectively properties of product testing wire in the conveyor system are analysed and observe and summary side elevation;
Fig. 9 is the general perspective of supporting plate conveyer of the present invention;
Figure 10 is the summary side elevation of Fig. 9;
Figure 11 is the diagrammatic elevational view of Fig. 9;
Figure 12 is the approximate vertical view of Fig. 9.
Referring now to preferred embodiment, with reference to the accompanying drawings, the present invention is described in detail as follows.
Fig. 1 is the general perspective of conveyor system of the present invention, and its whole centre portion omits and do not show.
On the frame 1 on upper strata, be provided with first and second conveyer conveyor line 2,3 of conveying parts, and, the 3rd and the 4th conveyor line 4,5 of test assembling performance be installed in the bottom of first and second conveyor line 2,3.Respectively this conveyor line 2,3,4 and 5 side frames 1 support that with some pillars 6 each line is bilevel structure.
There are some supporting plates 7 to be installed in movably respectively on this line 2,3,4 and 5.First and second conveyor line 2 and some part of 3 are equidistantly placed some control lever 9 on this upper strata, handle with the operating switch 8 that is placed on frame 1 two sides, with each supporting plate 7 of intermittent delivery.Therefore, the part in carrying is being carried out in the stack-mounted process, the operator can freely carry supporting plate 7 on the fixed position on demand.
Shown in Fig. 3 and 4, some rollers 11 form well-regulated interval on the both sides of the base portion that is installed in the conveyer chain 10 on each frame 1, and this conveyer chain is driven by the motor (not shown), so with supporting plate 7 sequentially-fed on this roller 11.
On the other hand, a bont 12 is fixed on the right side in this first and second conveyor line 2 and 3 central authorities, to accept supporting plate 7, then with the supporting plate lifting, shown in Fig. 1 and 2.Conveyor line 2 on this upper strata and 3 both sides are provided with conveying roller 13, so that supporting plate 7 laterally is transplanted on another conveyor line.In the left side of these second conveyor line, 3 middle positions, be provided with other conveying rollers 13, so that be placed with the supporting plate 7 of assembling the product that finishes on it, can move by jacking system 12 guiding.
Be about to this roller 13 startings, when supporting plate 7 reaches the top of this roller 13, and the assembling of top part by the sensor device (not shown), is carried out lifting with the operating parts 14 that this roller 13 is installed on it with respect to axle 15, as shown in Figure 6 when carrying out.At this moment, because roller 13 rotations can be moved supporting plate 7 to second conveyor line 3.When the roller 13 that is located at second conveyor line, 3 central portion right sides, when turning round by mode shown in Figure 5, supporting plate 7 can be moved by bont 12, or be transplanted on second conveyor line 3 by bont 12, and when switch 16 actions, the conveying roller 13 on second conveyor line, 3 ends can move sky supporting plate 7 to first conveyor line 2.
In addition, as shown in Figure 7, in bont 12, the operation tube 17 that is positioned at frame 1 one sides is connected with lifter 18 by chain 19, and lifter 18 can be moved up and down along guide rod 21 by gear 20 by this operation tins 17.On the upper surface of lifter 18, roller 22 is installed, with the motor (not shown) it is rotated.
Therefore, when roller 13 will import in the lifter 18 in these bonts 12 along the supporting plates 7 of each conveyor line 2,3,4 and 5 motions, selectively will be loaded with the supporting plate 7 of product, or deliver to second conveyor line 3 on the upper strata, or deliver to the 3rd conveyor line 4 in the lower floor.
Bont 12 in the setting of second conveyor line, 3 one sides, the supporting plate 7 of sending product from second conveyor line 3 on upper strata can be dropped on the 3rd conveyor line 4 in the lower floor, product reverse conveying on the 3rd conveyor line 4, and will test by properties of product, and along the 3rd and the 4th conveyor line 4 and 5 supporting plates of carrying 7, raise with the bont 12 that is located on other side, and then with empty supporting plate 7 by second conveyor line 3 on the upper strata, send back to first conveyor line, 2 sides.
On the other hand, Fig. 8 (A) and 8(B) be respectively bench section and the lateral plan of conveyor line of the present invention when properties of product are tested.On the lower surface of the supporting plate 7 of putting product, fix a copper coin 24.In being installed on frame 1 and on the top of the power supply of power supply thus supply part 25, there is a ground lug 26 to contact with copper coin 24.
In addition, owing to there is 110/200 volt socket 27 to be installed on the upper surface of supporting plate 7, when the plug 28 of product 23 inserts in wherein, and supporting plate 7 can carry out properties of product simultaneously and test continuously when the 3rd and the 4th conveyor line 4 and 5 moves.
And the two ends at the left and right side of the 3rd and the 4th conveyor line 4 and 5 are equipped with supporting plate conveyer 29, are used for supporting plate 7 with loading stocks, transmit or carry to axially adjacent conveyor line, shown in Fig. 9 to 12.
Conveyer 29 has a supporting plate 7 lifters 33 placed on it, and lifters 33 is placed in the end of mandrel rod 32, and the operation tube 31 that mandrel rod 32 usefulness are installed on main body 30 front surfaces is handled.In the both sides of this mandrel rod 32, place guide rod 34 and 34a, with 33 liftings of guiding lifters.
On the upper surface of lifters 33, a power supply supply part 35a who accepts power supply from main power source spare 35 is installed.Because roller 36 is on power supply part 35a, thus contact with roller 36 by the copper coin 24 on supporting plate 7 lower surfaces, and lasting product 23 on supporting plate 7 is powered, as Fig. 8 (A) and 8(B).
On the other hand, on the rear surface of main body 30, install one by operation tube 37, the moving member 38 that 37a handles, its is by along respective guide rod between levels 39 and 39a guiding, then this lifters 33 is moved to axial adjacent conveyor line.
In this, be installed in the operation tube 37 on moving member 38 rear surfaces, 37a wherein only has one and can place on demand, because an operation tube rod bending may take place, or the running instability waits some fault, therefore, the most handy two operation tubes 37,37a promotes moving member 38.
In the present invention that said structure is arranged, with the chain 10 of motor drive installation on frame 1 upper surface, with the supporting plate 7 of laying various parts above promoting, the operator is arranged on the position of first and second conveyor line 2 on upper strata shown in Figure 2 and 3 both sides, with each part assembling.
When supporting plate 7 shown in Fig. 2 (A), along this first and second conveyor line 2 and 3, from assembling initial station A, operator's available action bar 9 is disposed corresponding supporting plate 7 successively, it is parked on conveyor line 2 and 3 some part is carried out on the stack-mounted position, and assemble corresponding part.
And as shown in Figure 3, after the part assembling finished, when the operating switch 8 on this frame 1 side was pressed start-up function bar 9, supporting plate 7 was transported to next assembling procedure, so, carry out above-mentioned steps successively, the product assembling just can be finished.
Then, the operator can be installed in a laser disc player in the combined acoustics, and with manually or automatically making its unlatching and making it continue reach, combination reaches the upper surface of the roller 13 on second conveyor line, the 3 central portion right sides shown in Fig. 2 (A) then.
At this moment, the cabinet switch (not shown), the operating parts 14 of installation roller 13 as shown in Figure 6, moves up along axle 15 above.When the motor (not shown) was rotated roller 13, supporting plate 7 quilts of putting product above moved to bont 12 places along direction shown in the arrow.
So as shown in Figure 7, guiding supporting plate 7 is to lifter 18 motions, the tube 17 of start-up function simultaneously descends lifter 18 along guide rod 21, so, place the roller 22 of lifter 18 upper surfaces to rotate, the supporting plate of putting product is transplanted on the 3rd conveyor line 4.
As Fig. 8, supporting plate 7 moves on on the 3rd conveyor line 4, and when the power supply on current supply frame 1 inner shoe 7 downsides was supplied with part 25, electric current was supplied with the ground lug of installing on part 25 upper surfaces by power supply, supplied with the copper coin 24 of supporting plate 7 downsides.
Then,,, with the product starting, simultaneously product is pressed the direction of arrow among Fig. 2 B then, carried along the 3rd and the 4th conveyor line (performance testing line) 4 and 5 on request with 110/220 volt of current supply product 23 by the socket 27 on these supporting plate 7 upper surfaces.
At this moment, the available conveyer 29 that is placed on the 3rd and the 4th conveyor line 4 and 5 two ends is transferred product, according to the capacity rating that is placed on the laser disc player in the product 23, about 50-60 minute performance testing.
On the other hand, as shown in Figure 9, when with product by conveyer 29, carry to the 4th conveyor line from the 3rd conveyor line 4, or from the 4th conveyor line when the 3rd conveyor line is carried, the power supply that need not stop over, connect product 23.
As shown in figure 12, when the supporting plate 7 that will put product 23 arrived the lifters 33 of conveyer 29 along 4 conveyings of the 3rd conveyor line, cabinet switch start-up function tube 31 rose lifters 33 along mandrel rod 32.Simultaneously, two of installing on the moving member 38 on main body 30 rear surfaces are operated tube 37 and 37a starting, so whole this conveyer 29 is laterally transferred.
Therefore, when sensing the action of this conveyer 29, by lifters is reduced, supporting plate 7 can be transferred on the 4th conveyor line 5.Shown in Fig. 2 (B), when with supporting plate 7 when the 4th conveyor line 5 is transported to right-hand member, conveyer 29 actions of the 4th conveyor line 5 ends are so that supporting plate 7 moves on the 3rd conveyor line 4.
As mentioned above, after the performance testing of finishing product 23, the supporting plate 7 of putting product 23 is positioned at the upper surface of the conveying roller 13 on the 3rd conveyor line 4 right sides, conveying roller 13 startings, supporting plate 7 is moved on the bont 12 by above-mentioned, and bont 12 rise supporting plate 7, is put on second conveyor line 3.Like this, check the fault of product 23 the operator after, product can be packed on baling line subsequently; Then, empty supporting plate 7 is sent back to first conveyor line 2.
Herein, because the operation of this roller 13 and bont 12 as mentioned above, be described in detail so omit.
As mentioned above, because conveyor line of the present invention is arranged in the bilevel structure, so assembly working carries out on two conveyor lines on upper strata, and properties of product are tested and also are easy to carry out on two conveyor lines of lower floor.In addition, the supporting plate of putting product above is easy to transmit to adjacent conveyor line from the performance testing line, still continues during transmission to this product power supply.
Therefore, the erection space that the present invention takies is less, and the size of assigned line reduces, thereby capacity rating improves a lot.
The present invention can limit in top narration to embodiment.Be familiar with this area person with reference to narration, can understand and disclosed scheme and other embodiment are done various variations invention.Therefore, all this variation and embodiments of being expressed by the claims behind the literary composition all should consider to belong to the scope of the invention.
Claims (6)
1, a kind of conveyor system that is used for assembling each part of carrying successively by the supporting plate of arranging by straight line, it has:
Supporting plate is pressed predetermined direction carry, in order to first and second conveyor line of part stack-mounted, this two conveyor line is in the upper strata;
The the 3rd and the 4th conveyor line of test products performance, this two conveyor line are in the lower floor of this first and second conveyor line below;
Make supporting plate in the conveying make the operating control of intermittently stop or conveying, this operating control is provided with by predetermined interval on this conveyor line;
It is characterized in that this system also comprises:
Supporting plate on this conveyor line desired location is promoted, then the feedway of laterally transferring;
The supporting plate lifting that to carry along this conveyor line on the levels is so that selectively to the elevating transport apparatus of this transfer line supply respectively;
Be placed with the conveyer of the supporting plate of product above the transmission, this conveyer is provided with the two ends at the 3rd and the 4th conveyor line;
Supply with the power supplier of the electric current that is used for the properties of product test to each line of the 3rd and the 4th conveyor line.
2, delivery system as claimed in claim 1 is characterized in that, the delivery speed of the supporting plate of carrying along the 3rd in the lower floor and the 4th conveyor line is controlled according to the capacity rating of product.
3, delivery system as claimed in claim 1, it is characterized in that: this conveyer comprises a lifters, it is accepted along the supporting plate of this conveyor line conveying, handle by the operation tube then, also comprise a moving member, can whether load by detecting supporting plate by lifters, and on its right side or this moving member of Left-Hand Drive.
4, conveyor system as claimed in claim 1 is characterized in that: power supplier is arranged to electric current that test products is used, supplies with the roller of part and supplies with to supporting plate by being located at a power supply on these lifters two inboards.
5, conveyor system as claimed in claim 3 is characterized in that: being configured to successively of this moving member handled by two operation tubes.
6, a kind of carrying method, it may further comprise the steps:
(a ') provides belt conveyor or the conveyer chain on a plurality of conveying rollers that are installed in the conveyer conveyor line;
(b ') transmits supporting plate in the component assembly position of conveyer conveyor line;
(c ') after product assembling is finished, give fix time in, check the performance of product;
It is characterized in that it is further comprising the steps of:
(a) with the top supporting plate that has been placed with part, carry along first conveyor line that is located at the conveyor system upper strata successively, then part is assembled;
(b) after the part assembling is finished,, the top supporting plate that is placed with product is carried to an elevating transport apparatus with a feedway that is located at desired location on second conveyor line;
(c) with elevating transport apparatus with the top supporting plate that has been placed with product, carry to the 3rd conveyor line that is located at this second conveyor line below successively;
(d) will be transported to the supporting plate of the 3rd conveyor line, with the 3rd conveyor line be located at the conveyer at the 4th conveyor line two ends of the 3rd conveyor line one side, via the 3rd and the 4th conveyor line circulation time, the performance of test products simultaneously;
(e) will be transported to the supporting plate of the 3rd conveyor line by the 4th conveyor line again, carry to this elevating transport apparatus;
(f) supporting plate of the product that top placement performance testing is finished is carried to this conveyor line with this elevating transport apparatus; And
(g) collect the empty supporting plate of carrying by this second conveyor line, it is carried to this first conveyor line, so that resupply.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR5196/90 | 1990-04-14 | ||
| KR1019900005197A KR920009294B1 (en) | 1990-04-14 | 1990-04-14 | Device for transferring pallet used in conveyor system |
| KR1019900005196A KR920010653B1 (en) | 1990-04-14 | 1990-04-14 | Conveyor system |
| KR5197/90 | 1990-04-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1055907A CN1055907A (en) | 1991-11-06 |
| CN1022397C true CN1022397C (en) | 1993-10-13 |
Family
ID=26628225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91100317 Expired - Fee Related CN1022397C (en) | 1990-04-14 | 1991-01-14 | Conveyor system and conveying method thereof |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0747409B2 (en) |
| CN (1) | CN1022397C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441078C (en) * | 2004-12-31 | 2008-12-03 | 技嘉科技股份有限公司 | Method for transporting circuit board to tin furnace transmission line and its automatic transfer-machine |
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|---|---|---|---|---|
| US7311192B2 (en) * | 2005-08-15 | 2007-12-25 | Laitram, L.L.C. | Systems and methods for providing an improved timing conveyor |
| JP5686400B2 (en) * | 2010-03-12 | 2015-03-18 | 日特エンジニアリング株式会社 | Pallet transport device |
| CN102139717B (en) * | 2010-12-27 | 2013-03-20 | 江苏天奇物流系统工程股份有限公司 | Automatic assembling system for plate chains in automobile general assembly shop |
| CN102807092A (en) * | 2011-06-01 | 2012-12-05 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Solar cell conveying mechanism and solar cell conveying system |
| GB201118710D0 (en) * | 2011-10-28 | 2011-12-14 | Meadwestvaco Packaging Systems | Packaging system,machine and transfer apparatus |
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| CN103537947A (en) * | 2012-07-12 | 2014-01-29 | 鸿富锦精密工业（深圳）有限公司 | Machine machining system |
| DE102012107176A1 (en) * | 2012-08-06 | 2014-02-06 | Dematic Accounting Services Gmbh | Method for providing transport units from a warehouse |
| CN103183213B (en) * | 2013-03-21 | 2015-03-18 | 苏州凯蒂亚半导体制造设备有限公司 | Automatic cycle conveyor |
| CN103819128B (en) * | 2014-01-27 | 2018-10-26 | 三峡大学 | The double-deck cooling device of plank solidification and the double-deck cooling frame |
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| CN106144432A (en) * | 2015-04-13 | 2016-11-23 | 罗森伯格技术（昆山）有限公司 | The circulating streamline of antenna assemblies |
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| CN113666045A (en) * | 2020-05-13 | 2021-11-19 | 高侨自动化科技股份有限公司 | Article storage and storage system |
| CN112079097A (en) * | 2020-08-13 | 2020-12-15 | 中车唐山机车车辆有限公司 | Jacking and transverse moving device of shock absorber assembly production line, conveying system and assembly production line |
| CN112209044A (en) * | 2020-10-22 | 2021-01-12 | 广州文冲船厂有限责任公司 | Flange storage device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60188217A (en) * | 1984-03-07 | 1985-09-25 | Nissan Motor Co Ltd | Conveyor device for pallet conveyance |
| JPH042898Y2 (en) * | 1985-06-24 | 1992-01-30 | ||
| JPH0444488Y2 (en) * | 1987-04-08 | 1992-10-20 | ||
| JP2635605B2 (en) * | 1987-08-25 | 1997-07-30 | 株式会社東芝 | Conveyor device |
| JPH01162608A (en) * | 1987-12-18 | 1989-06-27 | Sagawa Butsuriyuu Service Kk | Dump tray sorting method and device |
-
1991
- 1991-01-10 JP JP173091A patent/JPH0747409B2/en not_active Expired - Fee Related
- 1991-01-14 CN CN 91100317 patent/CN1022397C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441078C (en) * | 2004-12-31 | 2008-12-03 | 技嘉科技股份有限公司 | Method for transporting circuit board to tin furnace transmission line and its automatic transfer-machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04213512A (en) | 1992-08-04 |
| JPH0747409B2 (en) | 1995-05-24 |
| CN1055907A (en) | 1991-11-06 |
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