Seedling raising tray stacking device and method

Abstract

The invention provides a seedling raising tray stacking device applied to the field of agricultural machinery, which comprises a main frame, the upper end of the main frame is divided by a cross beam to form a feeding area and a tray stacking area, and the seedling raising tray stacking device is characterized in that the feeding area is provided with a conveying roller unit for conveying seedling raising trays, and the main frame is provided with a pushing unit corresponding to the conveying roller unit in position; the pushing unit comprises a first-stage pushing assembly and a second-stage pushing assembly which are installed on the main frame and located at the upper end and the lower end of the conveying roller unit respectively, the tray accumulating area is provided with a tray accumulating assembly used for bearing and temporarily storing seedling raising trays, and the seedling trays are pushed to the starting point of a second-stage pushing mechanism through the first-stage pushing mechanism; the second-stage pushing mechanism is used for pushing the seedling trays to the tray stacking assembly, and after the tray stacking assembly is fully stacked with the preset number of trays, the falling assembly is matched, so that the overall occupied area of equipment is reduced, the production line layout is simplified, the space utilization rate of a seedling raising workshop is increased, and the equipment cost is reduced.

Description

Technical Field

[0001] This application relates to the field of agricultural machinery, and in particular to a seedling tray stacking device and method. Background Technology

[0002] Existing tray stacking machines automatically and neatly stack continuously conveyed seedling trays according to a set number. Through the cooperation of conveying mechanism, lifting device, claw mechanism and counting detection system, the machines complete the stacking of seedling trays one by one and the output of the whole stack, replacing manual tray stacking and improving the efficiency of the rear end of the seedling production line. The palletizing machine is connected after the tray stacking machine. It adopts a truss or robot structure and uses grippers, forks and other grasping mechanisms to accurately transport the stacked seedling trays and neatly place them on the pallet, realizing the automated stacking and transfer preparation of seedling trays. The two together constitute a complete automated sorting, stacking and palletizing system at the rear end of the seedling production line, which greatly reduces the intensity of manual labor and improves the automation and scale of factory seedling production.

[0003] The existing seedling production line uses a separate setup of a tray stacking machine and a robotic arm. Please refer to [link / reference]. Figure 11 During operation, the pre-treated seedling trays are conveyed to the feeding end of the stacking machine via a conveying mechanism. The stacking machine stacks the seedling trays one by one according to the preset number to form a neat stack of seedling trays. After the stack of seedling trays reaches the set number of layers, the stacking machine pushes the entire stack of seedling trays to the transition conveying mechanism, which then transfers the stack of seedling trays to the gripping station of the palletizer. Finally, after positioning and adjustment, the palletizer neatly places the stack of seedling trays on the pallet according to the preset arrangement, completing the entire stacking and palletizing operation process.

[0004] Existing technologies have high equipment costs, large overall footprint, and long production lines, which are not conducive to the intensive layout of seedling raising workshops. The connection between two pieces of equipment requires a transitional conveying mechanism, which can easily lead to problems such as seedling tray jamming, offset, and uneven stacking. In addition, the equipment structure is scattered, installation and debugging are complicated, and the later maintenance costs are high, making it difficult to meet the needs of efficient, compact, and stable automated seedling raising.

[0005] In response, we propose a seedling tray stacking device and method to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this application is to solve the technical problems of high equipment cost, long production line and low degree of automation. Compared with the prior art, it provides a seedling tray stacking device, including a main frame. The upper end of the main frame is divided into a feeding area and a tray accumulation area by a crossbeam. The feeding area is provided with a conveyor roller unit for conveying seedling trays. A pushing unit corresponding to the position of the conveyor roller unit is installed on the main frame. The pushing unit includes a primary pushing component and a secondary pushing component installed on the main frame and located at the upper and lower ends of the conveyor roller unit, respectively. The tray accumulation area is provided with a tray accumulation component for receiving and temporarily storing seedling trays. A falling component corresponding to the position of the tray accumulation component is installed on the main frame for driving the tray accumulation component to fall with the trays filled with seedling trays. A transport unit corresponding to the position of the falling component is installed at the bottom of the main frame for transferring the stacked seedling trays.

[0007] Furthermore, the conveyor roller unit is arranged longitudinally at a 90-degree angle to the accumulation area.

[0008] Furthermore, the conveyor roller unit is arranged laterally, with its conveying direction facing the accumulation area.

[0009] Furthermore, the primary push component includes a side plate fixedly installed on the main frame, a guide rail fixedly connected to the side plate, a push frame slidably connected to the guide rail via a slider, a motor fixedly installed at the lower end of the crossbeam, the output end of the motor being threadedly connected to the push frame via a lead screw, a rotating shaft rotatably connected to the push frame, a pair of push blocks fixedly installed on the rotating shaft, and the upper end of the push blocks being connected to the inner wall of the push frame via a spring.

[0010] Furthermore, one end of the rotating shaft passes through the pusher frame and is fixedly connected to a limiting section. A rotating ring is rotatably connected to the outer wall of the limiting section, and a stop block is fixedly connected to the lower end of the rotating ring. A backlash pin is inserted through the limiting section, and a pair of positioning bolts are threadedly connected to the outer wall of the rotating ring. The two ends of the backlash pin protrude from the outer wall of the limiting section, and the positioning bolts abut against the outer wall of the limiting section. A hanging rod is threadedly connected to the outer wall of the pusher frame, and the rotating ring is connected to the hanging rod through a spring. A baffle corresponding to the position of the stop block is installed on the main frame.

[0011] Furthermore, the secondary push assembly includes a mounting plate two installed on the main frame and located below the conveyor roller unit. A motor two is fixedly connected to the mounting plate two. The output end of the motor two is threadedly connected to a push frame two via a lead screw two. A pair of fixed frames are installed on the push frame two. The upper end of the fixed frame has a groove and is rotatably connected to a push block two. The lower end of the push block two is elastically connected to the bottom of the groove via a spring. A buffer frame corresponding to the position of the push frame two is installed on the main frame.

[0012] Furthermore, an installation plate is provided at the upper end of the main frame and in the middle of the accumulation plate area. The accumulation plate assembly includes a finger cylinder fixedly connected to the lower end of the installation plate. Both output ends of the finger cylinder are connected to a track frame through an extension plate. A pair of guide rails are provided at the lower end of the installation plate and on both sides of the finger cylinder. The track frame is slidably connected to the guide rails through a slider.

[0013] Furthermore, the lower end of the track frame is integrally formed with a support plate, and the support plate has multiple reserved slots. The tray assembly also includes a clamping plate, and the clamping plate is equipped with multiple claws corresponding to the positions of the reserved slots. The claws can pass through the reserved slots to clamp the seedling trays.

[0014] Furthermore, the falling assembly includes a pair of drive shafts, each with a commutator connected to both ends. A lead screw is rotatably connected to the upper end of the commutator, and the upper end of the lead screw is rotatably connected to the main frame. The falling assembly also includes a motor fixedly installed at the bottom of the main frame. A commutator is connected to the output end of the motor, and the two output ends of the commutator are respectively connected to the commutator through a coupling. A lifting plate is threaded onto the lead screw three, and a miniature cylinder is fixedly installed on the lifting plate. The output end of the miniature cylinder is connected to the clamping plate through the slider three, which is used to drive the clamping plate to move back and forth, and cooperate with the grippers to complete the clamping and release of the seedling tray.

[0015] A method for stacking seedling trays is as follows: S1. Arrange the conveyor roller unit longitudinally or laterally, and transport the seedling tray to the preset position in the feeding area through the conveyor roller unit; S2. Start the pushing unit. Motor 1 drives screw 1 to rotate, which drives pushing frame 1 to move along guide rail 1. Push block 1 pushes the seedling tray into the buffer frame. Then pushing frame 1 resets. Motor 2 drives screw 2 to rotate, which drives pushing frame 2 and push block 2 to abut the lower end of the seedling tray, pushing the seedling tray onto the tray assembly plate. Then pushing frame 2 resets. S3. When the seedling trays are stacked to the preset number, the micro cylinder drives the clamping plate to move, so that the grippers pass through the reserved slots to clamp the seedling trays, thus completing the support and fixation of the seedling trays. Then, the finger cylinder moves, causing the two track frames to move back and forth along the guide rails, so that the seedling trays are released from the support of the track frames. S4. The falling assembly starts, and motor three drives the transmission shaft to rotate through commutator two and commutator one, which in turn drives screw three to rotate, so that the lifting plate, along with the clamping plate and the arranged seedling trays, falls synchronously. At the same time, the finger cylinder is activated, which drives the two track frames to move towards each other along guide rail two. The track frames support the next set of seedling trays. When the seedling trays fall to the tray on the transport unit, the micro cylinder drives the clamping plate to reset, and the seedling trays are released from the clamp and placed on the tray. The falling assembly drives the lifting plate to rise back to the initial position. S5. Repeat steps S1-S4 to stack the seedling trays layer by layer. During the stacking process, the transport unit adjusts its position in a timely manner so that the seedling trays are stacked evenly with the same preset number of layers.

[0016] Compared to existing technologies, the advantages of this application are: 1. Automatic feeding of seedling trays is achieved through the conveyor roller unit. The primary and secondary pushing components of the pushing unit work together to quickly and smoothly push the seedling trays to the accumulation tray component. With the support and fixing of the accumulation tray component, the automatic falling of the falling component, and the transfer of the transport unit, no manual intervention is required throughout the process. All structures work together smoothly, effectively solving the problems of low efficiency and high labor intensity of traditional manual stacking. It significantly improves the automation level and overall operation efficiency of seedling tray stacking, reduces the overall footprint of the equipment, simplifies the production line layout, improves the space utilization of the seedling workshop, and reduces equipment costs.

[0017] 2. During the return process of pusher 31, the stop block 336 is blocked by the baffle 35, causing the rotating ring 332 to rotate at a certain angle. Through the area limiting function formed by the cooperation of the positioning bolt 334 and the anti-reverse pin 333, the rotating shaft 33 drives pusher 331 to rotate synchronously at the same angle, thereby causing pusher 331 to tilt up. This prevents pusher 331 from hitting the seedling tray entering the first-level pusher mechanism during the return, providing a stable guarantee for subsequent buffering and tray accumulation operations, and ensuring the continuity and smoothness of the entire stacking process.

[0018] 3. The seedling trays are held by the grippers on the clamping plate through the reserved grooves on the tray. The linkage of various structures realizes the precise positioning and stable support of the seedling trays, avoiding problems such as skewing and loosening during stacking, ensuring that the stacked seedling trays are neat and standardized, which is convenient for subsequent storage and transportation.

[0019] 4. The longitudinal tray feeding method can be adapted to more seedling tray production lines, while the transverse tray feeding method is faster and more suitable for batch rapid tray feeding scenarios. The two methods can be flexibly switched according to the actual work site and batch requirements of seedling trays. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main body of this application in the longitudinal tray feeding working state; Figure 2 This is a structural diagram of the main body of this application in the longitudinal tray-feeding state; Figure 3 This is a structural diagram of the main body of this application in a horizontal tray-entry state; Figure 4 This is a schematic diagram of the pusher component of the pusher frame during the reset process in this application; Figure 5 This is an isometric view of the bottom of the push component in this application; Figure 6 This is a schematic diagram of the structure at the junction of the rotating ring and the rotating shaft in this application; Figure 7 This is a partial cross-sectional structural diagram of the junction between the rotating ring and the rotating shaft in this application; Figure 8 This is a schematic diagram of the structure at the junction of the stacking assembly and the falling assembly in this application; Figure 9 This is a schematic diagram of the structure at the junction of the clamping plate and the track frame in this application; Figure 10 Exploded views of the clamping plate and track frame of this application; Figure 11 This is a schematic diagram of a traditional stacking system. Figure 12 This is a schematic diagram of the workflow of the subject of this application in the vertical tray loading state; Figure 13 This is a schematic diagram of the structure of the main body of this application in a horizontal disk entry state without a push unit.

[0021] Explanation of the labels in the diagram: 1. Main frame; 11. Crossbeam; 12. Mounting plate one; 2. Conveyor roller unit; 3. Pushing unit; 31. Pushing frame one; 311. Hanging rod; 32. Motor one; 321. Lead screw one; 33. Rotating shaft; 331. Push block one; 332. Rotating ring; 333. Anti-reverse pin; 334. Positioning bolt; 335. Spring; 336. Stop block; 34. Guide rail one; 341. Slider one; 342. Side plate; 35. Baffle; 36. Buffer frame; 37. Mounting plate two; 38. Motor two; 381. Lead screw 2; 382, ​​Pusher Frame 2; 383, Push Block 2; 4, Accumulation Plate Assembly; 41, Track Frame; 411, Pallet; 412, Reserved Slot; 42, Finger Cylinder; 421, Extension Plate; 422, Guide Rail 2; 423, Slider 2; 43, Clamping Plate; 431, Gripper; 5, Falling Assembly; 51, Drive Shaft; 511, Commutator 1; 512, Lead Screw 3; 513, Commutator 2; 514, Motor 3; 52, Lifting Plate; 521, Miniature Cylinder; 522, Slider 3; 6, Transport Unit. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within a compatible component. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1

[0025] Please see Figure 1-2 A seedling tray stacking device includes a main frame 1. The upper end of the main frame 1 is divided into a feeding area and a tray accumulation area by a crossbeam 11. The feeding area is provided with a conveyor roller unit 2 for conveying seedling trays. A pushing unit 3 corresponding to the position of the conveyor roller unit 2 is installed on the main frame 1. The pushing unit 3 includes a primary pushing component and a secondary pushing component installed on the main frame 1 and located at the upper and lower ends of the conveyor roller unit 2, respectively. The tray accumulation area is provided with a tray accumulation component 4 for receiving and temporarily storing seedling trays. A falling component 5 corresponding to the position of the tray accumulation component 4 is installed on the main frame 1 for driving the tray accumulation component 4 to fall with the trays filled with seedling trays. A transport unit 6 corresponding to the position of the falling component 5 is installed at the bottom of the main frame 1 for transferring the stacked seedling trays.

[0026] Please see Figure 2 The conveyor roller unit 2 is arranged longitudinally at a 90-degree angle to the accumulation plate area.

[0027] Specifically, the automatic feeding of seedling trays is achieved through the conveyor roller unit 2. The primary and secondary pushing components of the pushing unit 3 work together. Motor 1 32 drives the lead screw 1 321 to move the pushing frame 1 31, and motor 2 38 drives the lead screw 2 381 to move the pushing frame 2 382. This can quickly and smoothly push the seedling trays to the accumulation tray assembly 4. With the support and fixing of the accumulation tray assembly 4, the automatic falling of the falling assembly 5, and the transfer of the transport unit 6, no manual intervention is required throughout the process. The linkage of each structure is smooth, which effectively solves the problems of low efficiency and high labor intensity of traditional manual stacking, and significantly improves the automation level and overall operation efficiency of seedling tray stacking.

[0028] When the seedling tray is delivered to the baffle 35, the primary pushing mechanism pushes the seedling tray to the starting point of the secondary pushing mechanism. At this time, the secondary pushing mechanism pushes the seedling tray towards the accumulation tray assembly 4. After the accumulation tray assembly 4 is filled with the preset number of trays, the track frame 41 is released, and the gripper 431 starts to stack the trays. At this time, the secondary pushing mechanism acts as a buffer. When the track accumulation tray mechanism is released, the secondary pushing mechanism does not push the trays, and the primary pushing mechanism returns to the starting point normally, ready to push the next tray. When the track frame 41 is reset, the secondary pushing mechanism immediately pushes the seedling trays on the buffer rack 36 towards the track frame 41. This reduces the overall footprint of the equipment, simplifies the production line layout, improves the space utilization of the seedling raising workshop, and reduces costs.

[0029] Please see Figure 4 The first-level pushing component includes a side plate 342 fixedly installed on the main frame 1. A guide rail 34 is fixedly connected to the side plate 342. A pushing frame 31 is slidably connected to the guide rail 34 via a slider 341. A motor 32 is fixedly installed at the lower end of the crossbeam 11. The output end of the motor 32 is threadedly connected to the pushing frame 31 via a lead screw 321. A rotating shaft 33 is rotatably connected to the pushing frame 31. A pair of push blocks 331 are fixedly installed on the rotating shaft 33. The upper end of the push blocks 331 is connected to the inner wall of the pushing frame 31 via a spring 335.

[0030] Please see Figure 6-7 One end of the rotating shaft 33 passes through the pusher frame 31 and is fixedly connected to a limiting section. A rotating ring 332 is rotatably connected to the outer wall of the limiting section. A stop block 336 is fixedly connected to the lower end of the rotating ring 332. A backstop pin 333 is inserted on the limiting section. A pair of positioning bolts 334 are threadedly connected to the outer wall of the rotating ring 332. The two ends of the backstop pin 333 protrude from the outer wall of the limiting section. The positioning bolts 334 abut against the outer wall of the limiting section. A hanging rod 311 is threadedly connected to the outer wall of the pusher frame 31. The rotating ring 332 is connected to the hanging rod 311 through a spring 335. A baffle 35 corresponding to the position of the stop block 336 is installed on the main frame 1.

[0031] Specifically, the pushing unit 3 adopts a double-pushing structure. The pushing block 331 of the first-stage pushing component is elastically connected by a spring 335, which can adapt to seedling trays of different thicknesses and avoid damage to the seedling trays during the pushing process. After the pushing action of the pushing frame 31 is completed, the starting motor 32 reverses and drives the pushing frame 31 back to the starting position through the lead screw 321, ready to push the next seedling tray. During the return process, the stop block 336 is blocked by the baffle 35, causing the rotating ring 332 to rotate at a certain angle. The area is limited by the cooperation of the positioning bolt 334 and the anti-reverse pin 333. The function allows the rotating shaft 33 to drive the push block 331 to rotate synchronously at the same angle, thereby causing the push block 331 to tilt up. This prevents the push block 331 from hitting the seedling tray entering the first-level pushing mechanism when returning, providing a stable guarantee for subsequent buffering and tray accumulation operations, and ensuring the continuity and smoothness of the entire stacking process. When the push frame 31 moves forward, although the stop block 336 is also blocked by the baffle 35, the positioning bolt 334 and the anti-reverse pin 333 do not form a limiting action. The stop block 35 drives the rotating ring 332 to rotate freely, without affecting the pushing state of the push block 331.

[0032] Please see Figure 5 The secondary pushing component includes a mounting plate 37 installed on the main frame 1 and located below the conveyor roller unit 2. A motor 38 is fixedly connected to the mounting plate 37. The output end of the motor 38 is threadedly connected to a pushing frame 382 via a lead screw 381. A pair of fixed frames are installed on the pushing frame 382. The upper end of the fixed frame has a groove and is rotatably connected to a push block 383. The lower end of the push block 383 is elastically connected to the bottom of the groove via a spring 335. A buffer frame 36 corresponding to the position of the pushing frame 382 is installed on the main frame 1.

[0033] Specifically, the buffer rack 36 can accommodate an additional seedling tray. When the secondary pushing mechanism pushes the seedling tray inside the buffer rack 36 into the track rack 41, the primary pushing mechanism can continue to push the seedling tray into the empty buffer rack 36. The time it takes for the seedling tray to enter the buffer rack 36 is sufficient to allow the secondary pushing mechanism to reset, making the entire stacking process smoother and more uninterrupted.

[0034] Please see Figure 8 A mounting plate 12 is provided at the upper end of the main frame 1 and in the middle of the accumulation plate area. The accumulation plate assembly 4 includes a finger cylinder 42 fixedly connected to the lower end of the mounting plate 12. Both output ends of the finger cylinder 42 are connected to a track frame 41 through an extension plate 421. A pair of guide rails 422 are provided at the lower end of the mounting plate 12 and on both sides of the finger cylinder 42. The track frame 41 is slidably connected to the guide rails 422 through a slider 423.

[0035] Please see Figure 9-10The lower end of the track frame 41 is integrally formed with a support plate 411. The support plate 411 has multiple reserved slots 412. The seedling tray assembly 4 also includes a clamping plate 43. The clamping plate 43 is equipped with multiple claws 431 corresponding to the positions of the reserved slots 412. The claws 431 can pass through the reserved slots 412 to clamp the seedling tray.

[0036] Specifically, in the seedling tray assembly 4, the finger cylinder 42 drives the track frame 41 to move along the guide rail 422 to achieve positioning, and the gripper 431 on the clamping plate 43 passes through the reserved groove 412 of the tray 411 to clamp the seedling tray. The linkage of each structure realizes the precise positioning and stable support of the seedling tray, avoids problems such as skewing and loosening during the stacking process, and ensures that the stacked seedling trays are neat and standardized, which is convenient for subsequent storage and transportation.

[0037] Please see Figure 8 The falling assembly 5 includes a pair of drive shafts 51 with commutator 1 511 connected to both ends. A lead screw 3 512 is rotatably connected to the upper end of the commutator 1 511. The upper end of the lead screw 3 512 is rotatably connected to the main frame 1. The falling assembly 5 also includes a motor 3 514 fixedly installed at the bottom of the main frame 1. A commutator 2 513 is connected to the output end of the motor 3 514. The two output ends of the commutator 2 513 are respectively connected to the commutator 1 511 through couplings.

[0038] A lifting plate 52 is threaded onto the lead screw 3 512. A miniature cylinder 521 is fixedly installed on the lifting plate 52. The output end of the miniature cylinder 521 is connected to the clamping plate 43 through the slider 3 522, which is used to drive the clamping plate 43 to move back and forth, and cooperate with the gripper 431 to complete the clamping and release of the seedling tray.

[0039] Specifically, after the preset number of trays is accumulated, the micro cylinder 521 is activated, which drives the clamping plate 43 and the gripper 431 to move closer to the seedling tray and clamp it slightly. Then, the finger cylinder 42 is activated to drive the track frame 41 to release the seedling tray. Then, the falling component 5 is activated to make the gripper 431 move downward. At this time, the seedling tray also moves downward for stacking. As the number of layers of the seedling tray stack increases, the gripper 431 also has a slight downward squeezing action on the seedling tray stack. The core function is to optimize the stacking effect of the seedling tray stack, improve the stacking stability, and eliminate the gaps between the seedling trays. The four seedling trays accumulated by the tray accumulation component 4 may be slightly loose due to the transportation and receiving process. The slight squeezing can make the seedling tray stack fit more tightly, avoid the stacking being loose, and prevent the seedling trays from shifting or tipping after stacking. The slight pressure generated by squeezing can make the seedling tray stack form a whole force, ensuring that the posture is neat after stacking and suitable for subsequent transportation.

[0040] Please see Figure 12 A method for stacking seedling trays, as detailed below: The stacking method for vertical tray feeding is as follows: S1. The conveyor roller unit 2 is arranged longitudinally, and the seedling tray is conveyed to the preset position in the feeding area through the conveyor roller unit 2; S2. Start the pushing unit 3. Motor 1 32 drives the lead screw 1 321 to rotate, which drives the pushing frame 1 31 to move along the guide rail 1 34. Push block 1 331 pushes the seedling tray into the buffer frame 36. Then the pushing frame 1 31 resets. Motor 2 38 drives the lead screw 2 381 to rotate, which drives the pushing frame 2 382 and the pushing block 2 383 to abut against the lower end of the seedling tray, pushing the seedling tray onto the tray plate 411 of the tray assembly 4. Then the pushing frame 2 382 resets. S3. When the seedling trays are stacked to the preset number, the micro cylinder 521 drives the clamping plate 43 to move, so that the gripper 431 passes through the reserved groove 412 to clamp the seedling tray, thus completing the receiving and fixing of the seedling tray. Then the finger cylinder 42 moves, causing the two track frames 41 to move in opposite directions along the guide rail 2 422, so that the seedling tray is released from the support of the track frame 41. S4. The falling assembly 5 is started. The motor 3 514 drives the transmission shaft 51 to rotate through the commutator 2 513 and the commutator 1 511, which in turn drives the lead screw 3 512 to rotate, so that the lifting plate 52, along with the clamping plate 43 and the arranged seedling trays, falls synchronously. At the same time, the finger cylinder 42 is activated, which drives the two track frames 41 to move towards each other along the guide rail 2 422. The track frames 41 support the next set of seedling trays. When the seedling trays fall to the tray on the transport unit 6, the micro cylinder 521 drives the clamping plate 43 to reset, the seedling trays are released from the clamp and placed on the tray, and the falling assembly 5 drives the lifting plate 52 to rise back to the initial position. S5. Repeat steps S1-S4 to stack the seedling trays layer by layer. During the stacking process, the transport unit 6 adjusts its position in a timely manner so that the seedling trays are stacked evenly with the same preset number of layers.

[0041] Specifically, this tray feeding method is more stable and can be adapted to more seedling tray production lines, which can greatly extend the service life of the equipment. In actual tests, it can reach 1,500 trays per hour. Example 2

[0042] This invention provides a seedling tray stacking device, wherein the conveyor roller unit (2) is arranged laterally and its conveying direction is towards the accumulation area. Please refer to [link to relevant documentation]. Figure 3 , The stacking method for horizontal tray entry is as follows: D1. Arrange the conveyor roller unit 2 horizontally, with its conveying direction facing the accumulation area. The seedling tray is conveyed to the preset position in the feeding area through the conveyor roller unit 2. D2. Start the pushing unit 3. Motor 1 32 drives the lead screw 1 321 to rotate, which drives the pushing frame 1 31 to move along the guide rail 1 34. Push block 1 331 pushes the seedling tray into the buffer frame 36. Then the pushing frame 1 31 resets. Motor 2 38 drives the lead screw 2 381 to rotate, which drives the pushing frame 2 382 and the pushing block 2 383 to abut against the lower end of the seedling tray, pushing the seedling tray onto the tray plate 411 of the tray assembly 4. Then the pushing frame 2 382 resets. D3. When the seedling trays are stacked to the preset number, the micro cylinder 521 drives the clamping plate 43 to move, so that the gripper 431 passes through the reserved groove 412 to clamp the seedling tray, completing the receiving and fixing of the seedling tray. Then the finger cylinder 42 moves, driving the two track frames 41 to move back and forth along the guide rail 2 422, so that the seedling tray is released from the support of the track frame 41. D4. The falling assembly 5 is started. Motor 3 514 drives the transmission shaft 51 to rotate through commutator 2 513 and commutator 1 511, which in turn drives the lead screw 3 512 to rotate, so that the lifting plate 52, along with the clamping plate 43 and the arranged seedling trays, falls synchronously. At the same time, the finger cylinder 42 is activated, which drives the two track frames 41 to move towards each other along the guide rail 2 422. The track frames 41 support the next set of seedling trays. When the seedling trays fall to the tray on the transport unit 6, the micro cylinder 521 drives the clamping plate 43 to reset, the seedling trays are released from the clamp and placed on the tray, and the falling assembly 5 drives the lifting plate 52 to rise back to the initial position. D5. Repeat steps D1-D4 to stack the seedling trays layer by layer. During the stacking process, the transport unit 6 adjusts its position in a timely manner so that the seedling trays are stacked evenly with the same preset number of layers.

[0043] Specifically, this tray feeding method is faster. By using the conveyor roller unit in conjunction with the first and second level pushing mechanisms, the seedling trays can be quickly sent into the track frame 41. In actual tests, it can reach 2400 trays per hour. If the speed is faster, it will cause too much inertia, causing the soil inside the seedling tray to bulge upwards. Example 3

[0044] This invention provides a seedling tray stacking device; please refer to [link / reference]. Figure 13 The main frame 1 does not have a pusher unit 3 installed. The conveyor roller unit 2 is horizontally positioned with its conveying direction facing the stacking tray area. The output end of the conveyor roller unit 2 corresponds to the receiving end of the stacking tray assembly 4, and is used to directly convey the seedling trays into the stacking tray assembly 4.

[0045] Specifically, when the pushing unit 3 is not installed and the trays are fed horizontally, the conveyor roller unit 2 feeds directly, eliminating the pushing and pushing frame reset steps, making the process simpler. The seedling trays are continuously transported to the accumulation tray assembly 4 through the horizontally placed conveyor roller unit 2. The accumulation tray assembly 4 is gripped by the claws 431, the lifting plate 52 of the falling assembly 5 falls, and the transport unit 6 transfers the trays. The track frame 41 is simultaneously reset to receive the next set of seedling trays. All structures work together without interrupting the operation, ensuring the continuity of the stacking operation. Without affecting the smoothness of the process, the pushing unit 3 is reduced, and the cost is reduced even more.

[0046] The stacking method for horizontal disk entry without push unit 3 is as follows: E1. Install the conveyor roller unit 2 horizontally in the feeding area and adjust its conveying direction toward the accumulation area so that the output end of the conveyor roller unit 2 corresponds to the tray 411 of the accumulation assembly 4. E2. The seedling tray is directly transported to the tray plate 411 of the accumulation assembly 4 via the horizontally placed conveyor roller unit 2, without the need for the pusher unit 3 to push it. E3. When the seedling trays are stacked to the preset number, the micro cylinder 521 drives the clamping plate 43 to move, so that the gripper 431 passes through the reserved groove 412 to clamp the seedling tray, thus completing the receiving and fixing of the seedling tray. Then the finger cylinder 42 moves, causing the two track frames 41 to move in opposite directions along the guide rail 2 422, so that the seedling tray is released from the support of the track frame 41. E4. The falling assembly 5 is started. The motor 3 514 drives the transmission shaft 51 to rotate through the commutator 2 513 and the commutator 1 511, which in turn drives the lead screw 3 512 to rotate, so that the lifting plate 52, along with the clamping plate 43 and the arranged seedling trays, falls synchronously. At the same time, the finger cylinder 42 is activated, which drives the two track frames 41 to move towards each other along the guide rail 2 422. The track frames 41 support the next set of seedling trays. When the seedling trays fall to the tray on the transport unit 6, the micro cylinder 521 drives the clamping plate 43 to reset, the seedling trays are released from the clamp and placed on the tray, and the falling assembly 5 drives the lifting plate 52 to rise back to the initial position. E5. Repeat steps E1-E4 to stack the seedling trays layer by layer. During the stacking process, the transport unit 6 adjusts its position in a timely manner so that the seedling trays are stacked evenly with the same preset number of layers.

[0047] The above description is only the best implementation method adopted in this application in combination with current practical needs, but the scope of protection of this application is not limited thereto.

Claims

1. A seedling tray stacking device, comprising a main frame (1), wherein the upper end of the main frame (1) is divided into a feeding area and a tray accumulation area by a crossbeam (11), characterized in that, The feeding area is provided with a conveyor roller unit (2) for conveying seedling trays. The main frame (1) is equipped with a pusher unit (3) corresponding to the position of the conveyor roller unit (2). The pusher unit (3) includes a first-level pusher component and a second-level pusher component installed on the main frame (1) and located at the upper and lower ends of the conveyor roller unit (2), respectively. The tray accumulation area is provided with a tray accumulation component (4) for receiving and temporarily storing seedling trays. The main frame (1) is equipped with a falling component (5) corresponding to the position of the tray accumulation component (4) for driving the tray accumulation component (4) to fall after the seedling trays are filled. The bottom of the main frame (1) is equipped with a transport unit (6) corresponding to the position of the falling component (5) for transferring the stacked seedling trays.

2. The seedling tray stacking device according to claim 1, characterized in that, The conveyor roller unit (2) is arranged longitudinally at a 90-degree angle to the accumulation plate area.

3. The seedling tray stacking device according to claim 1, characterized in that, The conveying roller unit (2) is arranged laterally, and its conveying direction is towards the accumulation area.

4. A seedling tray stacking device according to claim 2 or 3, characterized in that, The first-level push assembly includes a side plate (342) fixedly installed on the main frame (1). A guide rail (34) is fixedly connected to the side plate (342). A push frame (31) is slidably connected to the guide rail (34) via a slider (341). A motor (32) is fixedly installed at the lower end of the crossbeam (11). The output end of the motor (32) is threadedly connected to the push frame (31) via a lead screw (321). A rotating shaft (33) is rotatably connected to the push frame (31). A pair of push blocks (331) are fixedly installed on the rotating shaft (33). The upper end of the push blocks (331) is connected to the inner wall of the push frame (31) via a spring (335).

5. The seedling tray stacking device according to claim 4, characterized in that, One end of the rotating shaft (33) passes through the pusher frame (31) and is fixedly connected to a limiting section. A rotating ring (332) is rotatably connected to the outer wall of the limiting section. A stop block (336) is fixedly connected to the lower end of the rotating ring (332). A backstop pin (333) is inserted on the limiting section. A pair of positioning bolts (334) are threadedly connected to the outer wall of the rotating ring (332). The two ends of the backstop pin (333) protrude from the outer wall of the limiting section. The positioning bolts (334) abut against the outer wall of the limiting section. A hanging rod (311) is threadedly connected to the outer wall of the pusher frame (31). The rotating ring (332) is connected to the hanging rod (311) by a spring (335). A baffle (35) corresponding to the position of the stop block (336) is installed on the main frame (1).

6. The seedling tray stacking device according to claim 4, characterized in that, The secondary push assembly includes a mounting plate two (37) installed on the main frame (1) and located below the conveyor roller unit (2). A motor two (38) is fixedly connected to the mounting plate two (37). The output end of the motor two (38) is threadedly connected to a push frame two (382) through a lead screw two (381). A pair of fixed frames are installed on the push frame two (382). The upper end of the fixed frame has a groove and is rotatably connected to a push block two (383). The lower end of the push block two (383) is elastically connected to the bottom of the groove through a spring (335). A buffer frame (36) corresponding to the position of the push frame two (382) is installed on the main frame (1).

7. The seedling tray stacking device according to claim 4, characterized in that, The main frame (1) has a mounting plate (12) at its upper end and in the middle of the accumulation plate area. The accumulation plate assembly (4) includes a finger cylinder (42) fixedly connected to the lower end of the mounting plate (12). Both ends of the finger cylinder (42) are connected to a track frame (41) through an extension plate (421). A pair of guide rails (422) are provided at the lower end of the mounting plate (12) and on both sides of the finger cylinder (42). The track frame (41) is slidably connected to the guide rails (422) through a slider (423).

8. The seedling tray stacking device according to claim 7, characterized in that, The lower end of the track frame (41) is integrally formed with a tray (411), and the tray (411) is provided with multiple reserved slots (412). The tray assembly (4) also includes a clamping plate (43), and the clamping plate (43) is equipped with multiple claws (431) corresponding to the positions of the reserved slots (412). The claws (431) can pass through the reserved slots (412) to clamp the seedling tray.

9. A seedling tray stacking device according to claim 4, characterized in that, The falling assembly (5) includes a pair of drive shafts (51) with commutator one (511) connected to both ends. The upper end of the commutator one (511) is rotatably connected to the lead screw three (512). The upper end of the lead screw three (512) is rotatably connected to the main frame (1). The falling assembly (5) also includes a motor three (514) fixedly installed at the bottom of the main frame (1). The output end of the motor three (514) is connected to commutator two (513). The two output ends of commutator two (513) are respectively connected to commutator one (511) through couplings. A lifting plate (52) is threaded onto the lead screw (512). A miniature cylinder (521) is fixedly installed on the lifting plate (52). The output end of the miniature cylinder (521) is connected to the clamping plate (43) through the slider (522) to drive the clamping plate (43) to move back and forth, and cooperate with the gripper (431) to complete the clamping and release of the seedling tray.

10. A method for stacking seedling trays, applicable to the seedling tray stacking device according to any one of claims 1-9, characterized in that, Specifically as follows: S1. Arrange the conveyor roller unit (2) longitudinally or laterally, and transport the seedling tray to the preset position in the feeding area through the conveyor roller unit (2); S2. Start the push unit (3), the motor (32) drives the lead screw (321) to rotate, which drives the push frame (31) to move along the guide rail (34), the push block (331) pushes the seedling tray into the buffer frame (36), and then the push frame (31) resets. The motor (38) drives the lead screw (381) to rotate, which drives the push frame (382) and the push block (383) to abut against the lower end of the seedling tray, pushing the seedling tray onto the tray plate (411) of the accumulation plate assembly (4), and then the push frame (382) resets. S3. When the seedling trays are stacked to the preset number, the micro cylinder (521) drives the clamping plate (43) to move, so that the gripper (431) passes through the reserved groove (412) to clamp the seedling tray, thus completing the receiving and fixing of the seedling tray. Then the finger cylinder (42) moves, driving the two track frames (41) to move in opposite directions along the guide rail two (422), so that the seedling tray is released from the support of the track frame (41). S4. The falling assembly (5) is started. Motor 3 (514) drives the transmission shaft (51) to rotate through commutator 2 (513) and commutator 1 (511), which in turn drives screw 3 (512) to rotate, so that the lifting plate (52) carries the clamping plate (43) and the arranged seedling trays to fall synchronously. At the same time, the finger cylinder (42) is activated, driving the two track frames (41) to move towards each other along guide rail 2 (422). The track frames (41) support the next set of seedling trays. When the seedling trays fall to the tray on the transport unit (6), the micro cylinder (521) drives the clamping plate (43) to reset, the seedling trays are released from the clamping and placed on the tray, and the falling assembly (5) drives the lifting plate (52) to rise back to the initial position. S5. Repeat steps S1-S4 to stack the seedling trays layer by layer. During the stacking process, the transport unit (6) adjusts its position in time so that the seedling trays are stacked evenly with the same preset number of layers.

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