Automatic upper and lower tray direction changeover device and system

Abstract

The present invention provides an automatic upper and lower layer tray exchange device and an automatic upper and lower layer tray exchange system that automatically supplies, sorts, stores, and / or changes the orientation of chip trays to the work box of a device in multiple directions and in upper and lower layers. [Solution] The upper and lower layer automatic direction changing tray exchange device A comprises two support column sets 2 erected on a platform and formed to surround a storage space 22, two stopper units protruding from the gap between the two support column sets to stop the bottoms of multiple chip trays and divide the storage space into an upper space and a lower space, and a lifting unit 4 having a mounting platform 41 that moves up and down within the lower space and places chip trays being supplied or sorted and stored on it. Multiple chip trays are stacked in the upper space.

Description

Technical Field

[0001] The present invention relates to the technical field of semiconductor devices, and particularly belongs to the technical field related to an upper and lower layer automatic direction conversion tray exchanger and its system.

Background Art

[0002] The main function of an IC (Integrated Circuit) test sorter is to test the functionality and electrical characteristics of IC chips and ensure that their quality and performance meet the specification requirements. Before and after testing, ICs are usually placed on chip trays such as JEDEC trays. These chip trays are supplied and sorted and stored by an automated device. Each will be described below.

[0003] Supply (Loading): Before testing, a chip tray loaded with untested ICs is sent to the test sorter, and the chip tray is automatically supplied via a Tray Loader or Tray Feeder.

[0004] Storage (Unloading): After testing, ICs are classified into good products (Good) / non-conforming products (NG) according to the test results, and ICs of different classifications are returned to different chip trays. There is a Tray Unloader inside or outside the test sorter to store the chip trays loaded with ICs and wait for packaging or retesting in the subsequent process.

[0005] Also, the supply and storage system of the chip tray and the IC test sorter are usually adjusted in process and operated in an automated integrated manner through a MES (Manufacturing Execution System) or other control systems. If an abnormality occurs during supply or storage, such as tray jamming or quantity mismatch, it will affect the efficiency and yield of the entire test process.

Summary of the Invention

Problems to be Solved by the Invention

[0006] In light of the challenges present in the chip tray supply and sorting storage systems described above, the inventors have diligently conducted research and have developed the automatic upper and lower layer orientation changing tray exchange device and system of the present invention. Therefore, the main object of the present invention is to provide an automatic upper and lower layer orientation changing tray exchange device and system that can smoothly perform a series of transport flows such as supplying, sorting, storing, and changing the orientation of multiple chip trays. Another object of the present invention is to provide an automatic upper and lower layer orientation changing tray exchange system that can supply and sort chip trays in multiple directions. [Means for solving the problem]

[0007] To achieve the above objectives, the present invention employs the following technical means. The upper and lower layer automatic direction change tray exchange device and system comprises two sets of support columns erected on the platform of the upper and lower layer automatic direction change tray exchange device, facing each other and arranged symmetrically with respect to a central axis, configured to surround a storage space, the two sets of support columns each including two outer columns and two inner columns, with two gaps formed between the two outer columns and the two inner columns; two stopper units provided protruding into the two gaps provided in the two sets of support columns, stopping the bottoms of a plurality of chip trays and dividing the storage space into an upper space and a lower space, the plurality of chip trays being placed in the upper space; and a lifting unit having a mounting table provided to move vertically up and down within the lower space, the mounting table placing the chip trays in transport on it and moving vertically up and down.

[0008] The two outer support columns and the two inner support columns are both L-shaped columns, and are arranged so that the right angles of each column face outwards, in order to facilitate the storage of the multiple rectangular chip trays in the upper space. The two outer support columns are provided with two plate-shaped members that are hinged to two rectangular rods provided on the two outer support columns, and the two inner support columns are provided with a pair of upper recesses and a pair of lower recesses that face each other to facilitate the transport of each chip tray.

[0009] The two outer support columns are provided with two limit switch sets for limiting the number of chip trays to be housed in the upper space, and the two limit switch sets are provided with two seats for fixing and mounting one of the reed switches of the two limit switch sets onto the two outer support columns, the reed switches are arranged facing each other, the two seats are provided with two sliding mechanisms corresponding to the space between the two rectangular rods, the two plate-like members are each provided with notches corresponding to the bends provided on the seats, and the two seats are further provided with two plate members facing outwards.

[0010] The two stopper units include two first drive devices, which drive the two stopper members to rotate at a predetermined angle, and the two first drive devices drive two first rotating members by two first motors, and the two first rotating members are connected to the two stopper members.

[0011] The lifting unit is provided with two conveyor belt pulley sets on both sides of the aforementioned base, and two protrusions extend outward from the central part of both outer sides of the aforementioned base. Two second drive devices for vertically lifting and lowering the aforementioned base are provided on the two protrusions.

[0012] The two second drive units drive two second rotating members with two second motors, the two second rotating members are connected to the two protrusions provided on the base described above, the two second rotating members are connected to two transmission rectangular rods, and the transmission rectangular rods are fixed to the platform of the device.

[0013] Each of the two conveyor belt pulley sets comprises a drive pulley set, a driven pulley set, and two conveyor belts. The drive pulley set has two drive pulleys connected to both ends of the drive shaft, and the driven pulley set has two driven pulleys connected to both ends of the drive shaft. The two conveyor belts are connected between the two drive pulleys and the two driven pulleys, and a third motor is connected to the drive shaft.

[0014] The lifting unit further includes an upper limit sensor and a lower limit sensor, which are used to limit the lifting range of the aforementioned stand.

[0015] Furthermore, the present invention provides an automatic upper and lower tray changing system that uses an automatic upper and lower tray changing device, comprising: a device body having a work box on a platform, the work box forming four side walls, each of the four side walls having an upper and lower outlet, and the four side walls of the work box extending outward to form a plurality of extended sections, the device body having an upper conveyor fixed to an upper stage corresponding to each of the upper outlets, and a lower conveyor fixed to a lower rotating stage corresponding to each of the lower outlets, and a plurality of automatic upper and lower tray changing devices mounted on the extended sections corresponding to the four side walls, each having a pair of upper recesses that correspond to the upper outlets provided on each of the side walls, and each having a pair of lower recesses that correspond to the lower outlets provided on each of the side walls.

[0016] The aforementioned multi-layer automatic upper and lower tray changing device is partially used for supplying chip trays and the remaining parts are used for sorting and storing chip trays, and the rotation of the lower rotating stage is driven by a motor and gears. [Effects of the Invention]

[0017] The present invention achieves the following effects through the technical means described above. 1. The present invention, through a combination of a support column set, a stopper unit, and a lifting unit, enables the entire transport process, including the supply, storage, and repositioning of multiple chip trays, to be carried out smoothly and without interruption, thereby improving the efficiency of chip testing. 2. The number of devices of the present invention installed is determined based on the number of side walls of the work box provided in the system of the present invention. For example, if the work box has four side walls, four devices of the present invention are provided in the main body of the device. This allows the system of the present invention to supply, change the orientation of, and sort and store chip trays in multiple directions and in upper and lower layers, improving test efficiency by streamlining the chip testing process, as well as reducing the volume of the system equipment of the present invention and reducing the space it occupies in the factory. [Brief explanation of the drawing]

[0018] [Figure 1] This figure shows an embodiment of the upper and lower layer automatic direction changing tray exchange device and system of the present invention. [Figure 2] This is a perspective view of the automatic upper and lower layer direction changing tray exchange device of the present invention. [Figure 3] This is a perspective view from a different viewpoint of the automatic upper and lower layer direction changing tray exchange device of the present invention. [Figure 4] This is a front view of the automatic upper and lower layer direction changing tray exchange device of the present invention. [Figure 5] This is a cross-sectional view along line aa in Figure 4. [Figure 6] Figure 4 is a cross-sectional view along line bb. [Figure 7] Figure 4 is a cross-sectional view along line c and a diagram illustrating the operation of its plate-like member. [Figure 8] This is a plan view showing the operation of the upper conveyor of the upper layer of the present invention and a diagram for explaining its operation. [Figure 9] This is a plan view showing the operation of the lower conveyor of the lower layer of the present invention and a diagram for explaining its operation. [Figure 10] This is a diagram for explaining the operation of distributing a plurality of empty trays of the present invention to the lower conveyor of the lower layer. [Figure 11] This is a diagram for explaining the operation of moving an empty tray on the lower conveyor of the lower layer of the present invention to the upper conveyor of the upper layer.

Embodiments for Carrying out the Invention

[0019] The upper and lower layer automatic direction-changing tray exchanger of the present invention and its system will be described with reference to FIGS. 1, FIG. 2, and FIG. 8. The present invention mainly automatically supplies, stores, and / or changes the direction of the chip tray 5 in multiple directions with respect to the work box 12 of the apparatus main body 1. Here, the upper and lower layer automatic direction-changing tray exchanger A includes two support sets 2, two stopper units 3, a lifting unit 4, and the like. These components will be described below based on the drawings.

[0020] As shown in Figures 2 to 4, the two support column sets 2 are erected on the platform 11 of the device body 1, facing each other and arranged symmetrically with respect to the central axis 21. The two support column sets 2 are configured to surround the storage space 22 and further include two outer support columns 23 and two inner support columns 24, with two gaps 25 formed between the two outer support columns 23 and the two inner support columns 24. Here, both the two outer support columns 23 and the two inner support columns 24 are L-shaped columns, and their right angles face outward, making it easier to store multiple rectangular chip trays 5 in the upper space 221. The two outer support columns 23 are also provided with two plate-like members 231 that are hinged to two rectangular rods 232 provided on the two outer support columns 23, and the multiple chip trays 5 can be removed by opening the two plate-like members 231. The two inner support columns 24 are provided with a pair of opposing upper recesses 241 and a pair of opposing lower recesses 242 to facilitate the transport of each chip tray.

[0021] Furthermore, as shown in Figures 2 and 4, the two outer support columns 23 are provided with two limit switch sets 26 for limiting the number of the multiple chip trays 5 that can be housed in the upper space 221. The two limit switch sets 26 are provided with two seat bodies 27 for fixing and mounting one of the reed switches 26a on the two outer support columns 23, and the reed switch 26a is positioned opposite the other reed switch 26b. The two seat bodies 27 are provided with two sliding mechanisms 32 corresponding to the two rectangular rods 232, and the number of the multiple chip trays 5 that can be housed in the upper space 221 is limited by the way the multiple chip trays 5 interlock via the two sliding mechanisms 32 to bring the reed switch 26a closer to the reed switch 26b. Furthermore, each of the two plate-shaped members 231 is provided with a notch 2311 corresponding to the bent portion 271 provided on the seat body 27, and the two seat bodies 27 are further provided with two plate members 272 facing outwards, making it easier to attach and detach the multiple chip trays 5 by opening the two plate-shaped members 231.

[0022] As shown in Figures 4 and 5, the two stopper units 3 have two stopper members 31 that protrude into the two gaps 25 formed in the two support column sets 2, stopping the bottoms of the multiple chip trays 5 and dividing the storage space 22 into an upper space 221 and a lower space 222. The multiple chip trays 5 are placed in the upper space 221. The two stopper units 3 further include two first drive devices 33, which drive the two stopper members 31 to rotate at a predetermined angle, allowing the two stopper units 3 to stop or release the bottoms of the multiple chip trays 5. The two first drive devices 33 also drive two first rotating members 332 with two first motors 331, and the two first rotating members 332 are connected to and interlock with the two stopper members 31.

[0023] The lifting unit 4 has a mounting table 41 that moves vertically up and down within the lower space 222, and places the chip tray 5 being transported on it and moves vertically up and down. In this case, the lifting unit 4 is provided with two conveyor belt pulley sets 42 on both sides of the mounting table 41, and two protrusions 411 extend outward from the central part of both outer sides of the mounting table 41, and two second drive devices 46 for driving the mounting table 41 to move vertically up and down are provided on the two protrusions 411.

[0024] Here, the two second drive units 46 drive two second rotating members 462 with two second motors 461, and the two second rotating members 462 are further connected to the two protrusions 411 provided on the base 41 described above. The two second rotating members 462 are further connected to two transmission rectangular rods 47, and the transmission rectangular rods 47 are fixed to the platform 11 of the device body 1. That is, the base 41 described above can be raised and lowered by the two second rotating members 462. Referring further to Figures 4 and 5, the two conveyor belt pulley sets 42 further include a drive pulley set 43, a driven pulley set 44, and two conveyor belts 45. The drive pulley set 43 has two drive pulleys 432 connected to both ends of a drive shaft 431, and the driven pulley set 44 has two driven pulleys 442 connected to both ends of a driven shaft 441. Furthermore, the two conveyor belts 45 are connected between the two drive pulleys 432 and the two driven pulleys 442, and a third motor 433 is connected to the drive shaft 431. The lifting unit 4 also includes an upper limit sensor 48 and a lower limit sensor 49, which are used to limit the lifting range of the base 41 described above.

[0025] As described above, the present invention provides a preferred solution for an automatic upper and lower layer tray exchange device. As shown in Figures 3 to 7, the device is mainly used for supplying, storing, and / or changing the direction of multiple chip trays 5 into the device body 1. When the automatic upper and lower layer tray exchange device A of the present invention is used for direction change supply, first the multiple chip trays 5 are filled with chips. That is, the two plate members 272 provided on the two seat bodies 27 are lifted, and the two bent portions 271 and the two reed switches 26a are linked to align with the two notches 2311 of the two plate members 231 provided on the support column set 2, after which the two plate members 231 can be opened. At this time, the two notches 2311 position the two reed switches 26a in this position, and after the multiple chip trays 5 or empty trays are filled into the upper space 221 formed by the support column set 2, the two plate members 231 are closed. In other words, by slightly lowering the two bent portions 271, the two plate-shaped members 231 can be positioned and closed. Meanwhile, the two first drive units 33 drive the two stopper members 31 to stop the bottoms of the multiple chip trays 5 and prevent them from falling. Alternatively, a dedicated overhead hoist transport (OHT) system can be used to load multiple chip trays 5 or empty trays directly from above the upper and lower layer automatic direction-changing tray exchange device A of the present invention.

[0026] At this time, when the reed switches 26a and 26b approach each other and detect that there are multiple chip trays 5 in the upper space 221, the lifting unit 4 starts to operate. First, when the mounting table 41 is positioned at the top of the lower space 222 by the drive of the two second drive units 46 and detected by the two upper limit sensors 48, the two first drive units 33 then drive the two stopper members 31 to release the stops on the bottoms of the multiple chip trays 5. As a result, one mounting table 41 that was at the bottom falls onto the mounting table 41, and then the two first drive units 33 drive the two stopper members 31 to stop the new bottoms of the multiple chip trays 5. Subsequently, the two second drive units 46 lower the mounting platform 41 again, and when it is located at the bottom of the lower space 222 and detected by the two lower limit sensors 49, the conveyor belt pulley set 42 transports the chip tray 5 placed on the mounting platform 41 to the work box 12 via the upper recess 241 or lower recess 242 provided in the two inner support columns 24. In this manner, multiple chip trays 5 within the upper space 221 are supplied sequentially, and once the transport is complete, new chip trays 5 or empty trays are replenished manually or automatically.

[0027] Similarly, when the upper and lower layer automatic direction changing tray exchange device A of the present invention is used for storage, there is no chip tray 5 in the upper space 221, and the two first drive devices 33 have driven two stopper members 31 in advance to open, and at the same time the mounting table 41 is positioned in advance at the bottom of the lower space 222. Next, when one chip tray 5 is transported from the work box 12 onto the mounting table 41 via the upper recess 241 or lower recess 242 provided in the two inner support columns 24, it is detected by the two lower limit sensors 49 in the process, and the conveyor belt pulley set 42 is activated so that the mounting table 41 receives and places the chip tray 5 and then stops. Subsequently, the two second drive devices 46 raise the mounting table 41, and when it is positioned at the top of the lower space 222 and detected by the two upper limit sensors 48, the two first drive devices 33 then drive two stopper members 31 to close, stopping the two stopper members 31 at the bottom of the chip tray 5. In the manner described above, multiple chip trays 5 are sequentially supplied into the upper space 221 until it is full. During the filling process, the topmost chip tray 5 pushes up the two sliding mechanisms 32, causing the reed switch 26a to move closer to the reed switch 26b, thereby limiting the number of multiple chip trays 5 that can be stored in the upper space 221. Simultaneously, the main unit 1 notifies the operator with a buzzer, and either removes the multiple full chip trays 5 from the upper space 221 to continue storing the chip trays 5, or a dedicated automated guided vehicle (AGV) system automatically removes the multiple full chip trays 5 from the upper and lower layer automatic direction-changing tray exchange device A of the present invention.

[0028] The automatic upper and lower tray reversal tray exchange system B of the present invention uses the above-described automatic upper and lower tray reversal tray exchange device A, as shown in Figures 1, 2, 8 to 11. This system comprises a device body 1, a work box 12 provided on a platform 11, the work box forming four side walls 121, and each of the four side walls 121 is provided with an upper outlet 122 and a lower outlet 123. The platform 11 extends outward from the four side walls 121 of the work box 12 to form a plurality of extension sections 111. Multiple automatic upper and lower tray reversal tray exchange devices A are mounted on the extension sections 111 corresponding to the four side walls 121. Furthermore, within the work box 12, upper conveyors 14 are provided, fixed to the upper stage 13, corresponding to each upper outlet 122 (in this embodiment, there are four upper conveyors 14), and within the work box 12, lower conveyors 16 are provided, fixed to the lower rotating stage 15, corresponding to each lower outlet 123 (in this embodiment, there are four lower conveyors 16). Each pair of upper recesses 241 provided corresponds to the upper outlet 122 provided on each side wall 121, and each pair of lower recesses 242 provided corresponds to the lower outlet 123 provided on each side wall 121. Also, as shown in Figure 9, some of the multiple upper and lower automatic direction changing tray exchange devices A are used for supplying chip trays 5 or empty trays, and the remaining parts are used for sorting and storing chip trays 5. The lower rotating stage 15 is driven to rotate by a motor 151 and gears 152, facilitating the direction changing of the chip trays 5 on each lower conveyor 16 of the lower rotating stage 15. Since the transport structure of the upper conveyor 14 and the lower conveyor 16 is the same as that of the lifting unit 4 described above, a detailed explanation is omitted here.

[0029] In this way, the present invention provides a preferred solution for an automatic upper and lower layer reversing tray exchange system. As shown in Figure 9, the number of automatic upper and lower layer reversing tray exchange devices A of the present invention is determined according to the number of side walls 121 of the work box 12 provided in the automatic upper and lower layer reversing tray exchange system B of the present invention. For example, if the work box 12 has four side walls 121, the device body is provided with four automatic upper and lower layer reversing tray exchange devices A of the present invention. As a result, the system of the present invention can supply, reverse, and sort and store chip trays 5 in multiple directions and in upper and lower layers, improving test efficiency by streamlining the chip test process, and reducing the volume of the system device of the present invention, thereby reducing the space occupied in the factory.

[0030] In other words, in the actual operation of the upper and lower layer automatic direction change tray exchange system B of the present invention, as shown in Figure 10 and the direction of the arrow, an empty tray 5a is sent onto one of the lower conveyors 16 of the lower layer rotating stage 15 via the mounting table 41 of the lifting unit 4 in the upper and lower layer automatic direction change tray exchange device A, which is used for supplying trays. The system then drives the motor 151 to rotate the lower layer rotating stage 15 by 90 degrees (see Figure 9), and the upper and lower layer automatic direction change tray exchange device A sends another empty tray 5a onto another lower conveyor 16 of the lower layer rotating stage 15. This is repeated until empty trays 5a are prepared on all four lower conveyors 16. When the upper and lower layer automatic direction change tray exchange device A, which is used for sorting and storage, requires an empty tray 5a, as shown in Figure 11 and the direction of the arrow, the system sends the empty tray on the corresponding lower conveyor 16 toward the mounting table 41 of the lifting unit 4 of the upper and lower layer automatic direction change tray exchange device A. When the mounting platform 41 detects an empty tray 5a, the system raises the lifting unit 4 to the upper level, and the mounting platform 41 transports the empty tray 5a onto the upper conveyor 14 on the upper stage 13 (see Figure 8). This provides the empty tray 5a for placing tested chips. Once the empty tray 5a is full of chips, it is transported via the upper conveyor 14 and the mounting platform 41 in sequence into the storage space 22 for temporary storage.

[0031] In summary, the present invention relates to an automatic upper and lower layer direction changing tray exchange device and system, and its components and structure are not found in literature or known technology, thus satisfying the patentability requirements for the invention.

[0032] Furthermore, the above description merely outlines the technical principles used in specific embodiments of the present invention. Any modifications made based on the concept of the present invention, whose resulting functions and effects do not deviate from the spirit encompassed by this specification and drawings, should all be included within the scope of the claims of the present invention. [Explanation of Symbols]

[0033] A: Automatic upper and lower layer orientation change tray exchange device B: Automatic upper and lower layer direction change tray exchange system 1: Main unit of the device 11: Platform 111: Expansion site 12: Workbox 121: Side wall 122: Upper loading / unloading entrance 123: Lower loading / unloading entrance 13: Upper Stage 14: Upper conveyor 15: Lower rotating stage 151: Motor 152: Gear 16: Lower conveyor 2: Support pole set 21: Central axis 22: Containment Space 221: Upper space 222: Lower space 23: Outer strut 231: Plate-shaped member 2311: Notch 232: Rectangular rod 24: Inner strut 241: Upper recess 242: Lower recess 25: Gap 26: Limit switch set 26a: Reed switch 26b: Reed switch 27: Seat 271: Bend part 272: Plate component 3: Stopper unit 31: Stopper component 32: Sliding mechanism 33: First drive unit 331: First motor 332: First rotating member 4: Lifting Unit 41: Mounting platform 411: Protrusion 42: Conveyor belt pulley set 43: Drive pulley set 431: Drive shaft 432: Drive pulley 433: Third motor 44: Driven pulley set 441: Driven axis 442: Driven pulley 45: Conveyor belt 46: Second drive unit 461: Second motor 462: Second rotating member 47: Transmission rectangular rod 48: Upper limit sensor 49: Lower limit sensor 5: Tip tray 5a: Empty tray

Claims

1. An automatic tray exchange device for upper and lower layers, Two sets of support columns are erected on the platform of the upper and lower automatic direction changing tray exchange device, facing each other and arranged symmetrically with respect to a central axis, and configured to surround the storage space, wherein each set of support columns includes two outer columns and two inner columns, and two gaps are formed between the two outer columns and the two inner columns, Two stopper units are provided, protruding from the two gaps between the two support column sets, to stop the bottoms of multiple chip trays and to divide the storage space into an upper space and a lower space, wherein the multiple chip trays are placed in the upper space, and An automatic upper and lower layer tray exchange device comprising a lifting unit having a mounting platform provided to move vertically up and down within the lower space, the mounting platform having a chip tray in transit on which it moves vertically up and down.

2. The upper and lower layer automatic direction changing tray exchange device according to claim 1, characterized in that the two outer support columns and the two inner support columns are all L-shaped columns and are arranged so that the upper space can easily accommodate the plurality of rectangular chip trays, and the right angles of each are all facing outwards, the two outer support columns are provided with two plate-shaped members that are hinged to two rectangular rods provided on the two outer support columns, and the two inner support columns are provided with a pair of upper recesses and a pair of lower recesses that face each other to facilitate the transport of each chip tray.

3. The upper and lower layer automatic direction changing tray exchange device according to claim 2, characterized in that the two outer support columns are provided with two limit switch sets for limiting the number of the plurality of chip trays to be housed in the upper space, the two limit switch sets are provided with two seats for fixing and mounting one of the reed switches of the two limit switch sets onto the two outer support columns, the reed switches are arranged facing each other, the two seats are provided with two sliding mechanisms corresponding to the space between the two rectangular rods, the two plate-like members are each provided with notches corresponding to the bent portions provided on the seats, and the two seats are further provided with two plate members facing outwards.

4. The upper and lower layer automatic direction changing tray exchange device according to claim 3, wherein the two stopper units include two first drive devices, the two first drive devices drive the two stopper members to rotate at a predetermined angle, the two first drive devices drive two first rotating members with two first motors, and the two first rotating members are connected to the two stopper members.

5. The lifting unit is provided with two conveyor belt pulley sets on both sides of the aforementioned base, and two protrusions extend outward from the central part of both outer sides of the aforementioned base, and the two protrusions are provided with two second drive devices for vertically lifting and lowering the aforementioned base, as described in claim 4.

6. The upper and lower layer automatic direction changing tray exchange device according to claim 5, characterized in that the two second drive devices drive two second rotating members with two second motors, the two second rotating members are connected to the two protrusions provided on the base described above, the two second rotating members are connected to two transmission rectangular rods, and the transmission rectangular rods are fixed to the platform of the device.

7. The upper and lower layer automatic direction changing tray exchange device according to claim 5, wherein the two conveyor belt pulley sets comprise a drive pulley set, a driven pulley set, and two conveyor belts, the drive pulley set has two drive pulleys connected to both ends of the drive shaft, the driven pulley set has two driven pulleys connected to both ends of the drive shaft, the two conveyor belts are connected between the two drive pulleys and the two driven pulleys, and a third motor is connected to the drive shaft.

8. The upper and lower layer automatic direction changing tray exchange device according to claim 5, wherein the lifting unit further includes an upper limit sensor and a lower limit sensor, the upper limit sensor and the lower limit sensor are used to limit the lifting operating range of the stand described above.

9. An automatic upper and lower layer orientation changing tray exchange system using the upper and lower layer automatic orientation changing tray exchange device according to any one of claims 2 to 8, A device body comprising a work box provided on a platform, the work box forming four side walls, each of the four side walls provided with an upper and lower loading / unloading entrance, and the four side walls of the work box extending outward to form multiple extended sections, wherein an upper conveyor fixed to an upper stage is provided inside the work box corresponding to each of the upper loading / unloading entrances, and a lower conveyor fixed to a lower rotating stage is provided inside the work box corresponding to each of the lower loading / unloading entrances, An automatic upper and lower layer tray exchange system comprising a plurality of upper and lower layer automatic direction change tray exchange devices, each of which is mounted on the extended portion corresponding to the four side walls, with each pair of upper recesses provided corresponding to the upper discharge openings provided on each of the side walls, and each pair of lower recesses provided corresponding to the lower discharge openings provided on each of the side walls.

10. The upper and lower layer automatic direction changing tray exchange system according to claim 9, characterized in that a portion of the plurality of upper and lower layer automatic direction changing tray exchange devices are used for supplying chip trays, the remaining portion is used for sorting and storing chip trays, and the rotation of the lower layer rotating stage is driven by a motor and gears.

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