An automatically rotating roller conveyor platform and its usage method

Abstract

The present invention discloses an automatically rotating roller conveyor platform and a using method thereof, which comprise a rotating platform and a fixed base. The rotating platform includes a rotating roller table, and the upper surface of the rotating roller table is connected with a plurality of parallel transmission shafts. Adjacent two transmission shafts are connected by a transmission chain for transmission. A transmission motor for driving the transmission shafts is also connected to the side surface of the rotating roller table. The fixed base includes a base, and the upper surface of the base is connected with a gear rotating bearing. A driving device for driving the rotation of the gear rotating bearing is also connected to the side surface of the base. The lower end of the rotating roller table is engaged with the gear rotating bearing, and a locking device is also connected to the side surface of the base. By driving the rotation direction of the rotating roller table through the gear rotating bearing, it does not need to frequently bear the impact of the coil, the equipment failure rate is low, and at the same time the rotation speed is fast. Cooperating with each proximity switch, the position of the tray on the rotating roller table can be automatically identified to control the transportation of the tray by the rotating roller table.

Description

Technical Field

[0001] The present invention belongs to the field of roller conveyor systems, and particularly relates to an automatically rotating roller conveyor platform and a usage method thereof. Background Art

[0002] In an aluminum rolling mill production line, since the production of aluminum coils adopts irreversible rolling, the leading end needs to be turned for each rolling pass and then re-rolled after re-coiling. In order to improve the utilization rate of the rolling mill and increase the output, an aluminum coil roller conveyor system needs to be set up. A rotating roller conveyor platform is provided in the roller conveyor system, which can realize the turning and transportation of the coiled strip. The previous method was to turn the coiled strip by rotating the overhead crane hook, which required manual assistance, took a long time, was prone to scratching the coiled strip during lifting and transportation, and had poor safety. After the walking beam appeared, the turning of the coiled strip could be carried out through a hydraulic rotating table. This device realizes rotation through a hydraulic motor, has a slow speed, can only cooperate with the walking beam for turning, cannot transport the coiled strip, and has a poor rhythm. The hydraulic rotating table also needs to receive the coiled strip from the walking beam and frequently bears the impact of the coiled strip, resulting in a high equipment failure rate, which cannot meet the requirements of high speed and fast rhythm of the aluminum rolling mill production line. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatically rotating roller conveyor platform and a usage method thereof that are simple to use and have a low failure rate.

[0004] The purpose of the present invention is achieved by the following technical means. An automatically rotating roller conveyor platform includes a rotating platform and a fixed base. The rotating platform includes a rotating roller table. The upper surface of the rotating roller table is connected with multiple parallel transmission shafts. Adjacent transmission shafts are connected by a transmission chain for transmission. A transmission motor for driving the transmission shaft is also connected to the side of the rotating roller table.

[0005] The fixed base includes a base. A gear rotating bearing is connected to the upper surface of the base. A driving device for driving the rotation of the gear rotating bearing is also connected to the side of the base.

[0006] The lower end of the rotating roller table is engaged with the gear rotating bearing.

[0007] A locking device is also connected to the side of the base.

[0008] One end of the transmission shaft is connected with two transmission sprockets. Adjacent transmission shafts are connected by a transmission chain connected to the transmission sprockets on the same side. The transmission shaft is respectively connected to other transmission shafts on both sides through different transmission sprockets.

[0009] One end of the transmission shaft is connected with a non-flanged transmission roller, and the other end is connected with a flanged roller.

[0010] On both sides of the rotating roller table, there are also connected cover plate brackets, and several support columns for supporting the cover plate are connected to the edges of the cover plate brackets.

[0011] The driving device includes a rotating motor connected to the side of the base and a rotating gear connected to the rotating motor. The transmission shaft of the rotating motor is connected to the rotating gear, and the rotating gear meshes with the teeth on the outer ring of the gear rotating bearing.

[0012] An encoder is also connected to the side of the base. An encoder gear is connected to the rotating shaft of the encoder. The encoder gear meshes with the teeth on the outer ring of the gear rotating bearing. The encoder is electrically connected to the locking device.

[0013] The locking device includes a locking motor connected to the side of the base. A locking disc that rotates with the locking motor is connected to the locking motor. An arc-shaped first locking block is arranged at the edge of the locking disc. A second locking block is connected to the center of the locking disc. A locking roller is connected to the lower end of the rotating roller table. The locking roller is stuck between the first locking block and the second locking block. An open position proximity switch and a locking position proximity switch distributed along the locking disc are also connected to the locking motor. The distance between the open position proximity switch and the locking position proximity switch is greater than the length of the first locking block. Both the open position proximity switch and the locking position proximity switch are electrically connected to the driving device.

[0014] On one side of the rotating roller table along the rotation direction of the transmission shaft, a right parking position proximity switch, a right deceleration position proximity switch, a left deceleration position proximity switch, and a left parking position proximity switch are sequentially connected from one end to the other end. The right parking position proximity switch, the right deceleration position proximity switch, the left deceleration position proximity switch, and the left parking position proximity switch are all electrically connected to the transmission motor. The left parking position proximity switch and the right parking position proximity switch are also electrically connected to the locking device.

[0015] A method for using an automatically rotating roller transportation platform includes the following steps:

[0016] In the first step, tray placement. Place the tray with aluminum coils on the non-edge transmission rollers and edge rollers of the transmission shaft from one side of the rotating roller table. As the transmission motor drives the transmission shaft and the non-edge transmission rollers and edge rollers thereon to rotate, the tray moves to the other side of the rotating roller table. During this process, when the tray is detected by the deceleration position proximity switch on the other side, the transmission motor decelerates. Subsequently, when the tray further moves and is detected by the parking position proximity switch on the other side, the transmission motor stops working, and the tray stops on the rotating roller table.

[0017] Step 2: Rotate the roller table. When the pallet is detected by the parking position proximity switch, the locking motor drives the locking disc to rotate. When the first locking block rotates to the open position proximity switch and no longer blocks the rotation of the locking roller, the open position proximity switch controls the rotation motor to start. The rotation motor drives the gear to rotate the bearing to drive the roller table to rotate. When the encoder detects a 180-degree rotation, the rotation motor stops working. The locking motor rotates the locking disc until the first locking block reaches the locking position proximity switch, and the rotation of the roller table is completed. The drive motor starts again to transport the pallet away.

[0018] Step 3: Restore the roller table. After the pallet is transported away, the locking motor drives the locking disc to rotate. The first locking block rotates to the open position proximity switch, and the open position proximity switch controls the rotation motor to reverse 180 degrees until it returns to the initial state. After reaching 180 degrees, the rotation motor stops working. The locking motor rotates the locking disc until the first locking block reaches the locking position proximity switch, and the roller table returns to the initial state.

[0019] The beneficial effects of the present invention are as follows: By driving the rotation direction of the roller table through the gear rotating bearing, it does not need to frequently bear the impact of the coil, has a low equipment failure rate, and at the same time has a fast rotation speed. In cooperation with the right parking position proximity switch, the right deceleration position proximity switch, the left deceleration position proximity switch, and the left parking position proximity switch, it can automatically identify the position of the pallet on the roller table to control the transportation of the pallet by the roller table. Brief Description of the Drawings

[0020] Figure 1 It is an elevation view of the structure of the roller transportation platform;

[0021] Figure 2 It is a schematic diagram of the structure of the rotating platform;

[0022] Figure 3 It is a schematic diagram of the structure of the fixed base;

[0023] In the figure: 1. Base; 2. Rotation motor; 3. Rotation gear; 4. Locking motor; 5. Locking disc; 5-1. First locking block; 5-2. Second locking block; 6. Open position proximity switch; 7. Locking position proximity switch; 8. Encoder gear; 9. Encoder; 10. Gear rotating bearing; 11. Locking roller; 12. Roller table; 13. Cover bracket; 14. Drive motor; 15. Drive shaft; 16. Drive sprocket; 17. Drive chain; 18. Flangeless drive roller; 19. Flanged roller; 20. Right parking position proximity switch; 21. Right deceleration position proximity switch; 22. Left deceleration position proximity switch; 23. Left parking position proximity switch.

[0024] The present invention will be further described in detail below with reference to the drawings and embodiments. Detailed Embodiment

[0025]

Example 1

[0026] As Figures 1 to 3 shown, an automatically rotating roller conveyor platform includes a rotating platform and a fixed base. The rotating platform includes a rotating roller table 12. On the upper surface of the rotating roller table 12, multiple parallel drive shafts 15 are connected. Adjacent drive shafts 15 are connected by a drive chain 17 for transmission. On the side of the rotating roller table 12, a drive motor 14 for driving the drive shaft 15 is also connected.

[0027] The fixed base includes a base 1. On the upper surface of the base 1, a gear rotating bearing 10 is connected. On the side of the base 1, a driving device for driving the rotation of the gear rotating bearing 10 is also connected.

[0028] The lower end of the rotating roller table 12 is engaged with the gear rotating bearing 10.

[0029] On the side of the base 1, a locking device is also connected.

[0030] Taking Figure 2 as an example, the rotating roller table 12 is a rectangular frame. Between the front and rear sides of the rotating roller table 12, five parallel drive shafts 15 are connected. Adjacent drive shafts 15 are connected by a drive chain 17, so that when one drive shaft 15 rotates, the other drive shafts 15 rotate synchronously. On the side of the rotating roller table 12, a drive motor 14 is connected, and the drive motor 14 is connected to one of the five drive shafts 15.

[0031] On the upper end of the base 1, a gear rotating bearing 10 is connected. The outer ring of the gear rotating bearing 10 is gear-shaped. The lower end of the rotating roller table 12 is engaged with the gear rotating bearing 10. On the side of the base 1, a driving device is also connected to drive the rotation of the gear rotating bearing 10. When the gear rotating bearing 10 rotates, it will drive the upper rotating roller table 12 to rotate together.

[0032] On the side of the base 1, a locking device is also connected to prevent the gear rotating bearing 10 from rotating when it is not required to rotate.

[0033] During use, place the tray on the drive shaft 15. As the drive shaft 15 moves left or right, and at the same time the gear rotating bearing 10 drives the rotating roller table 12 to turn, the tray can be turned during the movement process.

[0034]

Example 2

[0035] As Figure 2As shown, on the basis of Embodiment 1, one end of the transmission shaft 15 is connected to two transmission sprockets 16. Adjacent transmission shafts 15 are connected by a transmission chain 17 connected to the transmission sprockets 16 on the same side. The transmission shaft 15 is connected to other transmission shafts 15 on both sides through different transmission sprockets 16 respectively.

[0036] Two transmission sprockets 16 are connected to the front end of each transmission shaft 15, which are divided into a front transmission sprocket and a rear transmission sprocket. As Figure 1 shown, the central transmission shaft 15 is connected to the front transmission sprocket of the right transmission shaft 15 through the front transmission sprocket, and the central transmission shaft 15 is connected to the rear transmission sprocket of the left transmission shaft 15 through the rear transmission shaft 15. Adjacent two transmission shafts 15 are connected by the transmission sprockets 16 on the same side. The overall transmission chain 17 is alternately distributed, so that when one transmission shaft 15 rotates, the remaining transmission shafts rotate together under the drive of the transmission sprockets 16 and the transmission chain 17.

[0037] As Figure 2 shown, one end of the transmission shaft 15 is connected to a flangeless drive roller 18, and the other end is connected to a flanged roller 19. The flangeless drive roller 18 and the flanged roller 19 on the transmission shaft 15 rotate together with the transmission shaft 15. Place the legs of the tray on the rollers, and the rollers rotate to move the tray.

[0038] As Figure 1 shown, cover brackets 13 are also connected to both sides of the rotary roller table 12. A number of support columns for supporting the cover are connected to the edge of the cover bracket 13.

[0039] So that the entire rotary roller table 12 and the fixed base can be placed underground, and a cover is placed on the support columns of the cover bracket 13, which is more beautiful.

[0040]

Embodiment 3

[0041] As Figure 3 shown, on the basis of Embodiment 2, the drive device includes a rotating motor 2 connected to the side of the base 1 and a rotating gear 3 connected to the rotating motor 2. The transmission shaft of the rotating motor 2 is connected to the rotating gear 3, and the rotating gear 3 meshes with the teeth on the outer ring of the gear rotating bearing 10.

[0042] The rotating motor 2 is connected to the side of the base 1, the rotating gear 3 is connected to the transmission shaft of the rotating motor 2, and the rotating gear 3 meshes with the outer ring of the gear rotating bearing 10. In this way, the rotating motor 2 rotates the rotating gear 3, and the rotating gear 3 drives the gear rotating bearing 10 to rotate.

[0043] An encoder 9 is also connected to the side of the base 1. An encoder gear 8 is connected to the rotating shaft of the encoder 9. The encoder gear 8 meshes with the teeth on the outer ring of the gear rotating bearing 10. The encoder 9 is electrically connected to the locking device.

[0044] One side of the base 1 is also connected to an encoder 9. The rotating shaft of the encoder 9 is connected to an encoder gear 8. The encoder gear 8 meshes with a gear rotating bearing 10. As the gear rotating bearing 10 rotates, the encoder gear 8 rotates, enabling the encoder 9 to record the rotation angle.

[0045] The locking device includes a locking motor connected to one side of the base 1. A locking disc 5 that rotates with the locking motor is connected above the locking motor. An arc-shaped first locking block 5-1 is provided at the edge of the locking disc 5. A second locking block 5-2 is connected at the center of the locking disc 5. A locking roller 11 is connected to the lower end of the rotating roller table 12. The locking roller 11 is stuck between the first locking block 5-1 and the second locking block 5-2. An open position proximity switch 6 and a locking position proximity switch 7 that are distributed along the locking disc 5 are also connected to the locking motor. The distance between the open position proximity switch 6 and the locking position proximity switch 7 is greater than the length of the first locking block 5-1. Both the open position proximity switch 6 and the locking position proximity switch 7 are electrically connected to the drive device.

[0046] The transmission shaft of the locking motor extends upward and is connected to the locking disc 5 to rotate the locking disc 5. Two locking blocks are connected to the locking disc 5. The first locking block 5-1 is an arc-shaped long strip located at the edge of the locking disc 5, and the second locking block 5-2 is a semi-circle located at the center of the locking disc 5. A circular space that can accommodate the locking roller 11 is left between the first locking block 5-1 and the second locking block 5-2. In this way, when the rotating roller table 12 rotates, if the locking roller 11 is still stuck between the first locking block 5-1 and the second locking block 5-2, the rotating roller table 12 cannot rotate. Only when the locking disc 5 rotates and the locking roller 11 is no longer stuck, can the rotating roller table 12 rotate, preventing accidental rotation when not needed.

[0047]

Embodiment 4

[0048] As Figures 1 to 3 shown, on one side of the rotating roller table 12 along the rotation direction of the transmission shaft 15, a right parking position proximity switch 20, a right deceleration position proximity switch 21, a left deceleration position proximity switch 22, and a left parking position proximity switch 23 are sequentially connected from one end to the other end. The right parking position proximity switch 20, the right deceleration position proximity switch 21, the left deceleration position proximity switch 22, and the left parking position proximity switch 23 are all electrically connected to the drive motor 14. The left parking position proximity switch 23 and the right parking position proximity switch 20 are also electrically connected to the locking device.

[0049] At the front end of the rotating roller table 12, a right parking position proximity switch 20, a right deceleration position proximity switch 21, a left deceleration position proximity switch 22, and a left parking position proximity switch 23 are sequentially connected from right to left.

[0050]

Example 5

[0051] As Figures 1 to 3 shown, on the basis of Example 4, a method for using an automatically rotating roller conveyor platform includes the following steps:

[0052] First step, pallet placement. Place the pallet with aluminum coils on the side of the rotating roller table 12 onto the rimless driving rollers 18 and the rimmed rollers 19 of the transmission shaft 15. As the driving motor 14 drives the transmission shaft 15 and the rimless driving rollers 18 and the rimmed rollers 19 thereon to rotate, the pallet moves towards the other side of the rotating roller table 12. During this period, when the pallet is detected by the deceleration position proximity switch on the other side, the driving motor 14 decelerates. Subsequently, when the pallet further moves and is detected by the parking position proximity switch on the other side, the driving motor 14 stops working, and the pallet stops on the rotating roller table 12.

[0053] Second step, rotation of the rotating roller table. When the pallet is detected by the parking position proximity switch, the locking motor drives the locking disc 5 to rotate. When the first locking block 5-1 rotates to the open position proximity switch 6 and no longer blocks the rotation of the locking roller 11, the open position proximity switch 6 controls the rotation motor 2 to start. The rotation motor 2 drives the gear rotating bearing 10 to drive the rotating roller table 12 to rotate. When the encoder 9 detects a 180-degree rotation, the rotation motor 2 stops working. The locking motor rotates the locking disc 5 until the first locking block 5-1 reaches the locking position proximity switch 7, and the rotation of the rotating roller table 12 is completed. Then the driving motor 14 starts again to transport the pallet away.

[0054] Third step, restoration of the rotating roller table. After the pallet is transported away, the locking motor drives the locking disc 5 to rotate. The first locking block 5-1 rotates to the open position proximity switch 6. The open position proximity switch 6 controls the rotation motor 2 to reverse 180 degrees until it returns to the initial state. After reaching 180 degrees, the rotation motor 2 stops working. The locking motor rotates the locking disc 5 until the first locking block 5-1 reaches the locking position proximity switch 7, and the rotating roller table 12 returns to the initial state.

[0055] The right parking position proximity switch 20, the right deceleration position proximity switch 21, the left deceleration position proximity switch 22, the left parking position proximity switch 23, the open position proximity switch 6, and the locking position proximity switch 7 are all sensors for detecting whether there is an obstacle in front, such as infrared sensors.

[0056] When the pallet enters the roller from the right, as the pallet moves to the left, the front end of the pallet is detected by the left deceleration position proximity switch 22, which sends a signal to make the driving motor 14 decelerate. As the pallet continues to move to the left, the front end of the pallet is detected by the left parking position proximity switch 23, and the driving motor 14 stops running. The transmission shaft 15 no longer rotates, and the pallet also stops, waiting for the rotation of the rotating roller table 12.

[0057] If the tray enters from the left side, it is detected by the left deceleration position proximity switch 22 and the left parking position proximity switch 23 in sequence.

[0058] When the front end of the tray is detected by the left parking position proximity switch 23, the locking motor also starts to rotate, turning the first locking block 5-1 and the second locking block 5-2 to the position close to the open position proximity switch 6. While no longer blocking the locking roller 11, when the open position proximity switch 6 detects that the front is blocked by the first locking block 5-1, the rotation motor 2 starts and drives the gear rotation bearing 10 to rotate.

[0059] When the encoder 9 detects a 180-degree rotation, the rotation motor 2 is controlled to stop working. Only when the rotating roller table 12 has completed its rotation, the locking motor rotates at the same time. The first locking block 5-1 and the second locking block 5-2 are turned to the locking position proximity switch 7, blocking the locking roller 11. At the same time, when the locking position proximity switch 7 detects that the front is blocked by the first locking block 5-1, the system considers the turning to be completed, and controls the drive motor 14 to continue rotating, allowing the tray to continue moving until it leaves the rotating roller table 12, and the tray transportation is completed.

[0060] After the transportation is completed, the drive motor 14 is turned off, and the locking motor 14 rotates the locking disc. The first locking block 5-1 and the second locking block 5-2 are turned to the position close to the open position proximity switch 6. The rotation motor 2 starts and rotates in reverse. The gear rotation bearing 10 drives the rotating roller table 12 to rotate 180 degrees in reverse to return to the initial position. When the encoder 9 controls the rotation motor 2 to stop working during the 180-degree reverse rotation, the locking motor 14 rotates the locking disc 5. The first locking block 5-1 and the second locking block 5-2 are turned to the locking position proximity switch 7, blocking the locking roller 11. At the same time, when the locking position proximity switch 7 detects that the front is blocked by the first locking block 5-1, the system task of restoring the initial position is completed.

[0061] So far, the transportation, turning, and resetting of the entire roller table transportation platform are completed, and the automatic operation is finished.

Claims

1. An automatically rotating roller conveyor platform, characterized in that: It includes a rotating platform and a fixed base. The rotating platform includes a rotating roller table (12). On the upper surface of the rotating roller table (12), multiple parallel transmission shafts (15) are connected. Adjacent two transmission shafts (15) are connected by a transmission chain (17) for transmission. On the side of the rotating roller table (12), a transmission motor (14) for driving the transmission shaft (15) is also connected. The rotating roller table (12) is a rectangular frame. The fixed base includes a base (1). On the upper surface of the base (1), a gear rotating bearing (10) is connected. On the side of the base (1), a driving device for driving the rotation of the gear rotating bearing (10) is also connected. The lower end of the rotating roller table (12) is engaged with the gear rotating bearing (10). On the side of the base (1), a locking device is also connected. The locking device includes a locking motor (4) connected to the side of the base (1). On the locking motor (4), a locking disc (5) that rotates with the locking motor (4) is connected. At the edge of the locking disc (5), an arc-shaped first locking block (5-1) is provided. At the center of the locking disc (5), a second locking block (5-2) is connected. At the lower end of the rotating roller table (12), a locking roller (11) is connected. A circular space for accommodating the locking roller (11) is left between the first locking block (5-1) and the second locking block (5-2). The locking roller (11) is stuck between the first locking block (5-1) and the second locking block (5-2). On the locking motor (4), an open position proximity switch (6) and a locking position proximity switch (7) distributed along the locking disc (5) are also connected. The distance between the open position proximity switch (6) and the locking position proximity switch (7) is greater than the length of the first locking block (5-1). Both the open position proximity switch (6) and the locking position proximity switch (7) are electrically connected to the driving device.

2. The automatic rotating roller conveyor platform according to claim 1, characterized in that: One end of the transmission shaft (15) is connected with two transmission sprockets (16). Adjacent two transmission shafts (15) are transmission-connected through a transmission chain (17) connected to the transmission sprockets (16) on the same side. The transmission shaft (15) is connected to the other transmission shafts on both sides through different transmission sprockets (16) respectively.

3. The automatic rotating roller conveyor platform according to claim 1, wherein: One end of the transmission shaft (15) is connected with a non-flanged transmission roller (18), and the other end is connected with a flanged roller (19).

4. An automatically rotating roller conveyor platform according to claim 1, wherein: On both sides of the rotating roller table (12), a cover bracket (13) is also connected. At the edge of the cover bracket (13), several support columns for supporting the cover are connected.

5. An automatically rotating roller conveyor platform according to claim 1, characterized in that: The driving device includes a rotating motor (2) connected to the side of the base (1) and a rotating gear (3) connected to the rotating motor (2). The transmission shaft of the rotating motor (2) is connected to the rotating gear (3), and the rotating gear (3) meshes with the teeth on the outer ring of the gear rotating bearing (10).

6. An automatically rotating roller conveyor platform according to claim 1, characterized in that: On the side of the base (1), an encoder (9) is also connected. On the rotating shaft of the encoder (9), an encoder gear (8) is connected. The encoder gear (8) meshes with the teeth on the outer ring of the gear rotating bearing (10). The encoder (9) is electrically connected to the locking device.

7. An automatically rotating roller conveyor platform according to claim 1, characterized in that: On one side of the rotating roller table (12) along the rotation direction of the transmission shaft, a right-side parking position proximity switch (20), a right-side deceleration position proximity switch (21), a left-side deceleration position proximity switch (22), and a left-side parking position proximity switch (23) are sequentially connected from one end to the other end. The right-side parking position proximity switch (20), the right-side deceleration position proximity switch (21), the left-side deceleration position proximity switch (22), and the left-side parking position proximity switch (23) are all electrically connected to the drive motor (14). The left-side parking position proximity switch (23) and the right-side parking position proximity switch (20) are also electrically connected to the locking device.

8. A method for using an automatically rotating roller conveyor platform according to any one of claims 1-7, characterized in that, It includes the following steps: The first step is tray placement. Place the tray with aluminum coils on the non-edge transmission rollers (18) and the edge rollers (19) of the transmission shaft from one side of the rotating roller table (12). As the drive motor (14) drives the transmission shaft and the non-edge transmission rollers (18) and the edge rollers (19) thereon to rotate, the tray moves to the other side of the rotating roller table (12). During this period, when the tray is detected by the deceleration position proximity switch on the other side, the drive motor (14) decelerates. Subsequently, when the tray further moves and is detected by the parking position proximity switch on the other side, the drive motor (14) stops working, and the tray stops on the rotating roller table (12). The second step is the rotation of the rotating roller table. When the tray is detected by the parking position proximity switch, the locking motor (4) drives the locking disc (5) to rotate. The first locking block (5-1) rotates to the open position proximity switch (6). While the first locking block (5-1) no longer blocks the rotation of the locking roller (11), the open position proximity switch (6) controls the start of the rotation motor (2). The rotation motor (2) drives the gear rotating bearing (10) to drive the rotating roller table (12) to rotate. When the encoder (9) detects a 180-degree rotation, the rotation motor (2) stops working. The locking motor (4) rotates the locking disc (5) until the first locking block (5-1) reaches the locking position proximity switch (7), and the rotation of the rotating roller table (12) is completed. Then the drive motor (14) starts again to transport the tray away. The third step is the restoration of the rotating roller table. After the tray is transported away, the locking motor (4) drives the locking disc (5) to rotate. The first locking block (5-1) rotates to the open position proximity switch (6). The open position proximity switch (6) controls the rotation motor (2) to reverse 180 degrees until it returns to the initial state. After reaching 180 degrees, the rotation motor (2) stops working. The locking motor (4) rotates the locking disc (5) until the first locking block (5-1) reaches the locking position proximity switch (7), and the rotating roller table (12) returns to the initial state.

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