Automatic tray feeding device for seedling trays
The automatic seedling tray discharging device solves the problem of slow movement and easy damage of seedling tray stacks in traditional methods, and realizes automatic loading of seedling tray stacks and efficient and safe pallet transportation.
Patent Information
- Application Number
- CN202422792257.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-15
Smart Images
Figure CN223372135U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of agricultural machinery technology, and in particular to an automatic tray discharging device for seedling trays. Background Art
[0002] The seedling tray is an essential component of a rice transplanter, primarily used to raise rice seedlings. Typically made of polyvinyl chloride (PVC), the tray undergoes a specialized process, resulting in lightweight, easy handling, storage, and low cost. The tray's design resists softening, deformation, and cracking within a certain temperature range (-20°C to 45°C).
[0003] To minimize space usage, seedling trays are typically stacked when not in use and during transport, and then placed on a pallet. Traditionally, stacks of seedling trays are moved to a pallet using a pallet truck, which lifts the stack and places it on the pallet. However, this method inevitably damages the trays. Furthermore, manual movement is not only slow but also labor-intensive. Utility Model Content
[0004] In order to easily place a whole stack of seedling trays in a regular pattern on a pallet to facilitate transportation without causing damage to the seedling trays, the present application provides an automatic tray discharge device for seedling trays.
[0005] The present application provides an automatic tray discharging device for seedling trays, which adopts the following technical solutions:
[0006] The upper end of the frame is connected to a baffle with a hole in the bottom for the pallet to pass through, and the end of the frame away from the pushing mechanism is provided with a limiting component for preventing the seedling tray from sliding out of the pallet.
[0007] By adopting the above technical solution, the conveying motor drives the conveyor chain to operate and drives the pushing block to move synchronously, moving the pallet to a predetermined position. Then the pushing mechanism pushes the seedling tray stack onto the pallet to realize automatic loading of the seedling tray stack. The entire process is completed automatically by the structure, avoiding manpower consumption and improving the efficiency of loading the seedling tray stack. It is safer than the traditional method of using a seedling tray stacker and will not cause damage to the seedling tray.
[0008] Optionally, the limit assembly includes a support rod arranged on one side of the frame and a mounting plate connected to the top of the support rod, the mounting plate being hinged with a chain rod 1 and a chain rod 2 parallel to each other near one side of the frame, and a tension spring is connected between the chain rod 1 and the chain rod 2, and the ends of the chain rod 1 and the chain rod 2 are hinged with a chain rod 3, and a pulley is rotatably installed on the chain rod 3 for abutting against the seedling tray and preventing wear during the seedling tray transportation. A limit pin is provided on the mounting plate to prevent the chain rod 1 from rotating at will and a limit switch for detecting whether the seedling tray has reached a predetermined position on the tray, and the limit switch is movably abutted against the chain rod 1.
[0009] By adopting the above technical solution, when the seedling tray stack moves to the side of the pallet away from the pushing mechanism, it will abut against the pulley to limit the seedling tray stack and prevent the seedling tray stack from being squeezed out of the pallet. In addition, the pulley will not hinder the pallet from driving the seedling tray stack to move, thereby avoiding wear on the side of the seedling tray. The role of the chain rod 1 in the movable abutment with the limit switch is to monitor the position of the parallel seedling tray stacks on the pallet, so that the seedling tray stacks are moved to the predetermined position and arranged in a regular manner, thereby avoiding the seedling tray stack from tilting or uneven weight distribution of the seedling tray stack on the pallet.
[0010] Optionally, the frame is provided with a movable baffle for preventing the tray from tilting due to the force of the seedling tray, and the movable baffle is provided with a plurality of free rollers rotatably installed in an array on one side close to the frame, and the plurality of free rollers are in contact with one side of the tray.
[0011] By adopting the above technical solution, the pallet can be limited so that it can move along the conveyor chain and always be parallel to the conveyor chain. This can avoid the seedling tray driving the pallet to move during the loading process of the seedling tray stack, causing the pallet to detach from the conveyor chain, thereby improving the overall stability and safety of the equipment operation.
[0012] Optionally, the tray pushing mechanism includes a push-out conveyor part for pushing the seedling tray onto the tray and a push-out lifting part vertically arranged at one end of the push-out conveyor part away from the frame, the push-out conveyor part is vertically close to the frame, the push-out conveyor part includes a bracket, a plurality of push-out sprockets rotatably arranged at both ends of the bracket, a push-out chain wound around the push-out sprocket in the width direction, and a push-out motor transmission-connected to the push-out sprocket, and a push plate is slidably provided on the end of the bracket away from the frame, and the push plate is connected to a driving member.
[0013] By adopting the above technical solution, when the seedling tray stack is transported from the push-out lifting part to the push-out conveying part, the push plate pushes the seedling tray stack out under the drive of the driving member, and then the push-out chain transports it to the pallet. The operation is simple, and the seedling tray stack is automatically pushed by the mechanical mechanism, which saves manpower and facilitates the continuous loading of the seedling tray stack and the orderly movement of the seedling tray stack to the pallet, realizing automatic loading.
[0014] Optionally, the ejection and lifting part includes a lifting frame arranged on the bracket, a plurality of power rollers arranged at intervals on the bracket, and a roller drive chain transmission-connected to the plurality of power rollers. A roller drive motor is fixedly mounted on the bracket, and the roller drive motor is transmission-connected to the roller drive chain. The plurality of power rollers are located on the same horizontal plane, and the extension directions of the plurality of power rollers are perpendicular to the extension directions of the bracket. The lifting frame is connected with a lifting member for lifting the seedling tray and separating the seedling tray from the power roller.
[0015] By adopting the above technical solution, the seedling tray stack is driven by the power roller to move to the push-out conveyor part, and then lifted by the lifting member to facilitate separation from the power roller and be pushed by the push plate, ensuring the orderly movement of the seedling tray stack and avoiding the vertical inertia of the seedling tray stack when being pushed by the push plate. The moving direction of the power roller and the direction of the push-out conveyor part are perpendicular to each other to facilitate the loading of the seedling tray stack and reduce the space volume occupied by the entire device.
[0016] Optionally, the bracket is provided with a positioning frame for preventing the pushing-out lifting part from pushing the seedling tray out of the bracket, and the positioning frame is arranged at one end of the plurality of power rollers close to the bracket.
[0017] By adopting the above technical solution, the moving direction of the seedling tray stack during the loading process can be made completely perpendicular to the push-out conveying part, preventing the seedling tray stack from tilting. At the same time, the side of the seedling tray stack away from the push-out lifting part is made flush with the side of the push-out conveying part, ensuring that it will not fall out of the push-out conveying part, thereby playing a limiting and positioning role.
[0018] In summary, this application includes at least one of the following beneficial technical effects:
[0019] 1. This application can automatically load the seedling tray stacks onto the pallet, and automatically replenish and transport the pallets, saving manpower and preventing damage to the seedling trays. At the same time, the seedling tray stacks can be placed in an orderly manner, maximizing the carrying capacity of the pallet;
[0020] 2. This application can be connected with the seedling tray stacking mechanism to realize the integrated seedling tray stacking and loading process, greatly improving the efficiency of seedling tray stacking and transportation;
[0021] 3. The present application has a compact structure, which can ensure the stable transportation of the seedling tray stacks while occupying a small space volume. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the overall structure of an automatic tray discharging device for seedling trays in the present application.
[0023] Figure 2This is an overall schematic diagram of a frame and its connection structure of an automatic tray discharging device for seedling trays in the present application.
[0024] Figure 3 yes Figure 2 Magnified view at point A in the middle.
[0025] Figure 4 This is an overall view of the movable retaining frame of the automatic tray discharging device for seedling trays in the present application.
[0026] Figure 5 This is an overall view of the tray pushing mechanism of the automatic tray discharging device for seedling trays in the present application.
[0027] Figure 6 This is a structural view of the push-out conveying part of the automatic tray discharging device for seedling trays in the present application.
[0028] Figure 7 This is a structural view of the pushing and lifting part of the automatic tray discharging device for seedling trays in the present application.
[0029] Explanation of the accompanying reference numerals: 1. tray pushing mechanism; 11. ejection conveying part; 111. bracket; 112. ejection sprocket; 113. ejection motor; 114. ejection chain; 115. push plate; 12. ejection lifting part; 121. lifting frame; 122. power roller; 123. roller drive chain; 124. roller drive motor; 125. lifting member; 2. frame; 21. conveyor chain; 211. push block; 22. drive sprocket; 23. conveying motor; 24. baffle; 241. door hole; 25. tray guide; 26. movable baffle; 261. free roller; 3. tray; 4. limit assembly; 41. support rod; 42. mounting plate; 421. limit pin; 422. limit switch; 43. chain rod one; 44. chain rod two; 45. chain rod three; 451. pulley; 46. tension spring; 5. positioning frame. DETAILED DESCRIPTION
[0030] The following is combined with Figure 1-7 This application is described in further detail.
[0031] The embodiment of the present application discloses an automatic tray discharging device for seedling trays.
[0032] Reference Figure 1 An automatic tray unloading device for seedling trays is used to transfer seedling trays stacked by a stacking mechanism onto a tray 3, facilitating their placement and transportation. The device comprises a tray pushing mechanism 1, one end of which is connected to the tray unloading station of the stacking mechanism, and a frame 2 positioned at the other end of the tray pushing mechanism 1. A tray 3 is movably positioned on frame 2 to receive the seedling tray stacks.
[0033] Reference Figure 2Specifically, a plurality of conveyor chains 21 for pushing the trays 3 for horizontal movement are wound at equal intervals along the length of the top of the frame 2. The conveyor chains 21 are connected to drive sprockets 22 provided at both ends of the frame 2. The plurality of drive sprockets 22 located at the same end of the frame 2 are connected to a conveyor motor 23 for driving the plurality of conveyor chains 21 to rotate synchronously. A baffle 24 is provided at the top of the frame 2 to divide the frame 2 into two parts along the length, and a door hole 241 is provided at the bottom of the baffle 24 for a single tray 3 to pass through. A plurality of stacked trays 3 are placed at the end of the frame 2 away from the tray pushing mechanism 1. A plurality of push blocks 211 are provided at intervals on the conveyor chain 21 so that when the conveyor chain 21 rotates, the push blocks 211 on the conveyor chain 21 can push the tray 3 located at the bottom through the door hole 241 to the end of the frame 2 near the tray pushing mechanism 1 to load the seedling tray stack.
[0034] Preferably, the frame 2 is symmetrically provided with tray guides 25 on both sides away from the tray pushing mechanism 1 , so that workers can place the trays 3 more conveniently and the stacks of trays 3 to be used can be placed neatly without being skewed.
[0035] Reference Figure 3 Furthermore, a limiting assembly 4 is provided on the side of the frame 2 away from the tray pushing mechanism 1 to limit the position of the seedling tray stack on the tray 3 so that it will not fall off the tray 3 under the push of the tray pushing mechanism 1. The limiting assembly 4 specifically includes a support rod 41 provided on one side of the frame 2 and a mounting plate 42 fixedly connected to the end of the support rod 41 away from the frame 2. Two mutually parallel chain rods 1 43 and chain rod 2 44 are hinged on the mounting plate 42 on the side close to the frame 2, and the ends of chain rod 1 43 and chain rod 2 44 are hinged together with a chain rod 3 45. A pulley 451 is rotatably installed in the middle of the chain rod 3 45 to abut against the seedling tray stack to prevent the seedling tray stack from falling off the tray 3.
[0036] It is worth mentioning that, while the pulley 451 blocks the seedling tray stack, it will not affect the movement of the seedling tray stack along the length direction of the frame 2.
[0037] Preferably, the initial positions of the chain rod 1 43 and the chain rod 2 44 are both at a predetermined inclination angle with respect to the axis of the tray pushing mechanism 1, so that the chain rod 1 43 and the chain rod 2 44 can rotate more smoothly when the seedling tray pushes the pulley 451. During the rotation of the chain rod 1 43 and the chain rod 2 44, the chain rod 3 45 is always parallel to the length direction of the frame 2.
[0038] Reference Figure 3Furthermore, a torsion spring and a tension spring 46 are respectively disposed between the first link 43 and the mounting plate 42, and between the first link 43 and the second link 44, to assist in resetting the first and second links 43 and 44. A stop pin 421 is fixedly disposed on the mounting plate 42 on the side of the first link 43 away from the second link 44 to prevent the first link 43 from rotating in the opposite direction. Because the torsion spring reset structure is relatively common, and the torsion spring in the drawings of this embodiment is integrally connected to the first link 43, the torsion spring is not shown separately in the drawings of this embodiment.
[0039] A limit switch 422 is removably mounted on the mounting plate 42 and movably abuts the hinged end of the chain link 43. When the seedling tray stack presses against the pulley 451, causing the chain link 43 to rotate a predetermined angle, the hinged end of the chain link 43 abuts the limit switch 422. This indicates that the seedling tray stacks in the same row on the tray 3 have reached their predetermined position. This ensures that the weight of the seedling tray stacks on the tray 3 is distributed more evenly, preventing accidents during tray transport.
[0040] Reference Figure 2 and Figure 4 The frame 2 is provided with a movable stopper 26 for preventing the tray 3 from being affected by the friction of the moving seedling tray stack, which would cause the tray 3 to tilt. The movable stopper 26 is slidably arranged on the side of the frame 2 near the limit assembly 4, and a plurality of free rollers 261 are rotatably arranged in an array on the side of the movable stopper 26 near the tray pushing mechanism 1 to prevent the tray 3 from being scratched.
[0041] Reference Figure 5 and Figure 6 Specifically, the tray pushing mechanism 1 includes a push-out conveyor 11 for delivering the seedling trays to the tray 3, and a push-out lifting portion 11 for transporting the seedling tray stack from the stacking mechanism to the push-out conveyor 11. The push-out conveyor 11 includes a bracket 111 and a plurality of push-out sprockets 112 symmetrically disposed at both ends of the bracket 111. The push-out sprockets 112 located at the same end of the bracket 111 are evenly spaced and connected to a push-out motor 113 to drive the push-out sprockets 112 to rotate synchronously. A push-out chain 114 is wrapped around the two push-out sprockets 112 located on the same vertical plane. The push-out chains 114 work together to push the seedling tray stack onto the tray 3.
[0042] Reference Figure 6 The end of the bracket 111 away from the frame 2 is slidably provided with a push plate 115, and the push plate 115 is connected to a driving member for driving the push plate 115 to slide back and forth, so as to push the seedling tray stack from the push-out lifting part 12 to the push-out conveying part 11. The driving member used in this application is preferably a sprocket chain structure to facilitate transmission connection.
[0043] Reference Figure 5 and Figure 7 The push-out lifting unit 12 comprises a lifting frame 121 slidably mounted on the bracket 111 and a plurality of power rollers 122 spaced apart from each other on the bracket 111. Each of the power rollers 122 is connected to a roller drive chain 123, which is connected to a roller drive motor 124 for rotating the power rollers 122. The lifting frame 121 is mounted outside the power rollers 122 and has a lifting member 125 at its bottom for lifting the power rollers 122.
[0044] When the seedling tray stack is driven by the power roller 122 to move to a predetermined position on the push-out conveyor 11 , the lifting frame 121 rises and separates the seedling tray stack from the power roller 122 , so that the baffle 24 can smoothly push the seedling tray stack onto the push-out chain 114 .
[0045] The lifting member 125 in this application is the same as the jack, so it will not be described in detail.
[0046] It is worth mentioning that the axes of the power rollers 122 are parallel to the direction of travel of the ejection chain 114, that is, the loading direction of the ejection lifting part 12 and the feeding direction of the ejection conveying part 11 are perpendicular to each other. This structure not only allows the seedling trays to be placed on the tray 3 smoothly and regularly, but also makes the overall structure of the device more compact, reducing the excess space occupied by the device as a whole.
[0047] Reference Figure 5 Preferably, a positioning frame 5 is fixedly installed on the bracket 111 on the side away from the feeding direction, and the positioning frame 5 is located at one end of the power rollers 122 close to the bracket 111 to limit the seedling tray stack and prevent it from falling out of the bracket 111.
[0048] The implementation principle of the automatic tray discharging device for seedling trays in the embodiment of the present application is as follows:
[0049] The stacked seedling trays are transported to the push-out conveyor 11 by the power roller 122 , and then the push plate 115 and the push-out chain 114 on the push-out conveyor 11 work together to push the seedling trays onto the tray 3 on the frame 2 .
[0050] During this process, when several seedling trays in the same row on the tray 3 move to a predetermined position, the seedling trays on the tray 3 that are farther away from the tray pushing mechanism 1 will press the pulley 451 in the limit assembly 4, causing the chain rod 1 43 to abut against the limit switch 422. The limit switch 422 then sends an electrical signal to the tray pushing mechanism 1 to stop the operation.
[0051] When the tray 3 is full, the conveyor chain 21 will drive the tray 3 to move away through the push block 211 , and at the same time drive the next empty tray 3 to pass through the door hole 241 and enter the position to be loaded.
[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. An automatic tray unloading device for seedling trays, used for conveying seedling trays stacked by a tray stacking mechanism onto a tray (3), comprising a tray pushing mechanism (1) with one end docked with a tray discharge station of the tray stacking mechanism, and a frame (2) placed at an end of the tray pushing mechanism (1) away from the tray discharge station, with a tray (3) movably placed on the frame (2), characterized in that: A plurality of conveyor chains (21) for pushing the tray (3) to move horizontally and connected to a driving sprocket (22) are wound at equal intervals on the top end of the frame (2) along the length direction. The plurality of conveyor chains (21) rotate synchronously and are commonly connected to a conveying motor (23). A plurality of push blocks (211) for dragging the conveyor chains (21) to rotate are arranged at intervals on the conveyor chains (21). The upper end of the frame (2) is connected to a baffle (24) with a hole at the bottom for the tray (3) to pass through. A limiting component (4) for preventing the seedling tray from sliding out of the tray (3) is arranged at one end of the frame (2) away from the tray pushing mechanism (1).
2. The automatic tray discharging device for seedling trays according to claim 1, characterized in that: The limiting assembly (4) includes a support rod (41) arranged on one side of the frame (2) and a mounting plate (42) connected to the top end of the support rod (41), the mounting plate (42) is hinged with a chain rod 1 (43) and a chain rod 2 (44) parallel to each other on the side close to the frame (2), and a tension spring (46) is connected between the chain rod 1 (43) and the chain rod 2 (44), and the ends of the chain rod 1 (43) and the chain rod 2 (44) are connected together. The chain rod 3 (45) is hingedly connected to the chain rod 3 (45), and a pulley (451) is rotatably mounted on the chain rod 3 (45) for contacting with the seedling tray and preventing wear during the seedling tray transportation. The mounting plate (42) is provided with a limit pin (421) for preventing the chain rod 1 (43) from rotating arbitrarily and a limit switch (422) for detecting whether the seedling tray reaches a predetermined position on the tray (3). The limit switch (422) is movably contacted with the chain rod 1 (43).
3. The automatic tray discharging device for seedling trays according to claim 1, characterized in that: The frame (2) is provided with a movable retaining frame (26) for preventing the tray (3) from being tilted due to the force of the seedling tray. A plurality of free rollers (261) are rotatably mounted in an array on one side of the movable retaining frame (26) close to the frame (2). The plurality of free rollers (261) are in contact with one side of the tray (3).
4. The automatic tray discharging device for seedling trays according to claim 1, characterized in that: The tray pushing mechanism (1) comprises a push-out conveying portion (11) for pushing the seedling tray onto the tray (3) and a push-out lifting portion (12) vertically arranged at one end of the push-out conveying portion (11) away from the frame (2); the push-out conveying portion (11) is vertically close to the frame (2); the push-out conveying portion (11) comprises a bracket (111), a plurality of push-out sprockets (112) rotatably arranged at both ends of the bracket (111), a push-out chain (114) wound around the push-out sprockets (112) in a width direction, and a push-out motor (113) transmission-connected to the push-out sprockets (112); a push plate (115) is slidably arranged at one end of the bracket (111) away from the frame (2); and the push plate (115) is connected to a driving member.
5. The automatic tray discharging device for seedling trays according to claim 4, characterized in that: The ejection and lifting portion (12) comprises a lifting frame (121) arranged on the bracket (111), a plurality of power rollers (122) arranged at intervals on the bracket (111), and a roller drive chain (123) connected to the plurality of power rollers (122); a roller drive motor (124) is fixedly mounted on the bracket (111); the roller drive motor (124) is connected to the roller drive chain (123); the plurality of power rollers (122) are located on the same horizontal plane, and the extension direction of the plurality of power rollers (122) is perpendicular to the extension direction of the bracket (111); the lifting frame (121) is connected to a lifting member (125) for lifting the seedling tray and separating the seedling tray from the power roller (122).
6. The automatic tray discharging device for seedling trays according to claim 5, characterized in that: The bracket (111) is provided with a positioning frame (5) for preventing the pushing-out lifting portion (12) from pushing the seedling tray out of the bracket (111); the positioning frame (5) is provided at one end of the plurality of power rollers (122) close to the bracket (111).