Automatic one-by-one conveying structure for plastic trays

Abstract

The invention relates to the technical field of conveying structures, in particular to an automatic plastic tray one-by-one conveying structure which comprises a first conveying belt, a second conveying belt and a U-shaped frame, the first conveying belt and the second conveying belt are both used for conveying plastic trays, the U-shaped frame is located below the first conveying belt, and guide grooves are formed in the front side wall and the rear side wall of the U-shaped frame; by designing a special conveying structure, the first conveying belt and the second conveying belt do not need to be started and stopped frequently, and therefore the fatigue damage phenomenon of equipment is reduced; the end of the second conveying belt is higher than the first conveying belt through vertical movement of the second conveying belt, the trays on the first conveying belt are blocked by the second conveying belt, and therefore the trays are conveyed one by one, other structural modes do not need to be arranged for blocking of the trays in the structural mode, only the second conveying belt needs to be used, and the conveying efficiency is improved. Therefore, the second conveying belt not only realizes a conveying function, but also realizes a blocking function.

Description

Technical Field

[0001] The invention relates to the technical field of conveying structures, and in particular to an automatic one-by-one conveying structure for plastic pallets. Background Art

[0002] With the rapid development of industrial automation, the efficiency requirements of logistics and warehousing systems are increasing. In the field of modern warehousing and logistics, plastic pallets, as an important carrying tool, play a vital role in the storage and handling of goods.

[0003] Plastic pallets are generally processed by injection molding, and then cooled, trimmed, painted, etc. to obtain finished pallets. Since pallets need to go through multiple processes and different processing equipment for processing, the pallets use a conveying structure to achieve their position transfer. In the traditional method, they are generally transported by a single conveyor belt. After the pallet is transported to the designated position, the conveyor belt is stopped and it is transferred to the equipment manually or by a robotic arm. The conveyor belt is then continued to transport the next pallet to the designated position. When using this method, the conveyor belt needs to be frequently opened and closed, which can easily cause fatigue damage to the equipment. In addition, when the conveyor belt is transporting pallets, it is necessary to separate the two adjacent pallets in advance. Otherwise, when a pallet is taken off the conveyor belt, it is easy to interfere with the adjacent pallet, resulting in the risk of its placement tilting or falling off. This makes the pallet conveying work inconvenient. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a plastic pallet automatic conveying structure, the specific technical solution adopted is: According to a first aspect of the present invention, there is provided an automatic one-by-one conveying structure for plastic pallets, comprising a first conveyor belt, a second conveyor belt and a U-shaped frame, wherein the first conveyor belt and the second conveyor belt are both used for conveying plastic pallets, the U-shaped frame is located below the first conveyor belt, and guide grooves are provided on the front and rear side walls of the U-shaped frame, the guide grooves are composed of a horizontal portion and a downwardly inclined portion, and the inclined portion is located on a side of the U-shaped frame close to the first conveyor belt, a sliding column is slidably provided in the guide groove, and a vertical plate is vertically provided on the sliding column; The second conveyor belt is provided with two driving rollers for driving the second conveyor belt to run, and a mobile frame is vertically slidably provided on both the front and rear sides of the top of the U-shaped frame, the driving roller is rotatably installed on the mobile frame, and the vertical plate is horizontally slidably installed on the side wall of the mobile frame, and a baffle is provided between the two vertical plates for blocking the plastic pallet on the second conveyor belt; Among them, when the first conveyor belt transports the plastic pallet to the second conveyor belt, the first conveyor belt and the second conveyor belt are on the same horizontal plane. When the plastic pallet is transported on the second conveyor belt, the second conveyor belt moves in the vertical direction, and the end of the second conveyor belt blocks the plastic pallet on the first conveyor belt. A motor for providing power to the second conveyor belt and the transmission roller is provided on a movable frame.

[0005] Furthermore, a pushing unit is provided on the U-shaped frame, and the pushing unit is used to provide a constant lateral thrust for the vertical plate; The pushing unit comprises a horizontal cylinder and a fixing frame located inside the U-shaped frame, the horizontal cylinder is fixed on the U-shaped frame through the fixing frame, two pistons are slidably arranged in the horizontal cylinder, an oil inlet pipe and an oil discharge pressure regulating valve are connected in the middle of the horizontal cylinder, and the oil inlet pipe and the oil discharge pressure regulating valve are both located between the two pistons; Wherein, transmission units are arranged on the front and rear side walls of the U-shaped frame, and the transmission units are connected to the piston. When the piston moves in the horizontal cylinder due to the hydraulic action, the piston pushes the vertical plate to move horizontally through the transmission unit.

[0006] Further, the transmission unit includes two first sprockets and one second sprocket rotatably mounted on the side wall of the U-shaped frame, the two first sprockets and the second sprocket are driven by a transmission chain, and the upper surface of the transmission chain is horizontal, a connecting frame is vertically arranged on the upper surface of the transmission chain, and the connecting frame is vertically slidably mounted on the vertical plate; A threaded sleeve is provided in the middle of the second sprocket, the threaded sleeve passes through the second sprocket and the U-shaped frame, the threaded sleeve is fixedly connected to the second sprocket, the threaded sleeve is rotatably connected to the U-shaped frame, a threaded rod is threadedly inserted in the threaded sleeve, and the threaded rod is fixedly connected to a piston in the horizontal cylinder; Wherein, the cross-sectional shape of the horizontal cylinder and the shape of the piston are both square.

[0007] Furthermore, support frames are arranged on the front and rear side walls of the U-shaped frame, a sliding sleeve is arranged on the support frame, the sliding sleeve and the support frame are locked by bolts, and a first limit plate for limiting the lateral movement position of the connecting frame is arranged on the sliding sleeve.

[0008] Furthermore, the support frame is horizontally slidably installed on the U-shaped frame, and the sliding direction of the support frame is perpendicular to the conveying direction of the second conveyor belt. The support frame and the U-shaped frame are connected through a first cylinder, and a second limit plate is provided on the support frame; The baffle is provided with a fixing groove, in which a laser rangefinder is arranged.

[0009] Furthermore, a pressure plate is arranged on the top of the baffle.

[0010] Furthermore, a support platform is fixed on the pressure plate, a second cylinder is arranged on the side wall of the baffle, and the movable end of the second cylinder is rotatably connected to the support platform via a connecting rod; Wherein, the pressure plate is rotatably mounted on the baffle plate.

[0011] Furthermore, a limit block is fixed on the connecting rod, and the limit block is located between the second cylinder and the support platform. When the pressing plate is horizontal, the limit block contacts the upper surface of the pressing plate.

[0012] The beneficial effects of the present invention are: By designing a special conveying structure, the first conveyor belt and the second conveyor belt do not need to be started and stopped frequently, thereby reducing equipment fatigue damage; the vertical movement of the second conveyor belt is used to make the end of the second conveyor belt higher than the first conveyor belt, so that the second conveyor belt blocks the pallet on the first conveyor belt, thereby realizing the one-by-one conveying of the pallets. This structural method does not need to set up other structural methods for blocking the pallets, and only needs to use the second conveyor belt. Therefore, the second conveyor belt realizes both the conveying function and the blocking function, and this method can effectively avoid the risk of position offset or falling caused by mutual interference of pallets in the traditional method, and improves the stability and accuracy of the conveying process; this solution simplifies the complicated operating steps in the traditional conveying process, making the entire conveying process smoother, reducing unnecessary intermediate links, and is conducive to improving overall work efficiency; in summary, this automatic one-by-one conveying structure for plastic pallets improves production efficiency while also taking into account the advantages of equipment maintenance, ease of operation and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 Side view of the structure; Figure 3 yes Figure 1 Structural schematic diagram of the middle guide groove; Figure 4 yes Figure 1 Schematic diagram of the structure of the mobile rack; Figure 5 yes Figure 1 Structural schematic diagram of the middle support frame; Figure 6 yes Figure 1 A schematic diagram of the enlarged structure of the middle baffle; Figure 7 yes Figure 6 Schematic diagram of the structure from another perspective.

[0015] Reference numerals: 1. First conveyor belt; 2. Second conveyor belt; 3. U-shaped frame; 4. Guide groove; 5. Sliding column; 6. Vertical plate; 7. Driving roller; 8. Moving frame; 9. Motor; 10. Baffle; 11. Horizontal cylinder; 12. Fixed frame; 13. Piston; 14. Oil inlet pipe; 15. Oil discharge pressure regulating valve; 16. First sprocket; 17. Second sprocket; 18. Driving chain; 19. Threaded sleeve; 20. Threaded rod; 21. Connecting frame; 22. Support frame; 23. Sliding sleeve; 24. First limit plate; 25. First cylinder; 26. Second limit plate; 27. Laser rangefinder; 28. Pressing plate; 29. ​​Support platform; 30. Second cylinder; 31. Connecting rod; 32. Limit block. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. This embodiment is written in a progressive manner.

[0019] like Figures 1 to 7As shown, an automatic conveying structure for plastic pallets of the present invention comprises a first conveyor belt 1, a second conveyor belt 2 and a U-shaped frame 3, wherein the first conveyor belt 1 and the second conveyor belt 2 are both used for conveying plastic pallets, the U-shaped frame 3 is located below the first conveyor belt 1, and guide grooves 4 are provided on the front and rear side walls of the U-shaped frame 3, the guide grooves 4 are composed of a horizontal portion and a downwardly inclined portion, and the inclined portion is located on the U-shaped frame 3 on a side close to the first conveyor belt 1, a sliding column 5 is slidably provided in the guide groove 4, and a vertical plate 6 is vertically provided on the sliding column 5; Two driving rollers 7 are provided in the second conveyor belt 2 for driving the second conveyor belt 2 to run. A mobile frame 8 is vertically slidably provided on both the front and rear sides of the top of the U-shaped frame 3. The driving roller 7 is rotatably mounted on the mobile frame 8. The vertical plate 6 is horizontally slidably mounted on the side wall of the mobile frame 8. A baffle 10 is provided between the two vertical plates 6 for blocking the plastic pallet on the second conveyor belt 2. Among them, when the first conveyor belt 1 transports the plastic pallet to the second conveyor belt 2, the first conveyor belt 1 and the second conveyor belt 2 are on the same horizontal plane. When the plastic pallet is transported on the second conveyor belt 2, the second conveyor belt 2 moves up in the vertical direction, and the end of the second conveyor belt 2 blocks the plastic pallet on the first conveyor belt 1. A mobile frame 8 is provided with a motor 9 for providing power to the second conveyor belt 2 and the transmission roller 7.

[0020] In detail, the first conveyor belt 1 and the second conveyor belt 2 are both horizontally arranged, so that the plastic pallets can be transported horizontally, the U-shaped frame 3 is located below the first conveyor belt 1, and the U-shaped frame 3 mainly plays a supporting role, the opening of the U-shaped frame 3 faces upward, and the front and rear end surfaces of the U-shaped frame 3 are vertically slidably interspersed with moving frames 8, the second conveyor belt 2 and the two transmission rollers 7 are both located between the two moving frames 8, and the transmission rollers 7 are rotatably installed on the moving frames 8, so that the second conveyor belt 2 and the two transmission rollers 7 can be driven by the motor 9 to run synchronously, and the guide groove 4 can guide the slide column 5, thereby guiding the vertical plate 6 and the baffle 10. When the slide column 5 slides in the inclined part of the guide groove 4, the slide column 5 can push the moving frame 8, the transmission roller 7, the motor 9, the second conveyor belt 2 and the baffle 10 to move in the vertical direction through the vertical plate 6. At this time, the second conveyor belt 2 will gradually be higher than the first conveyor belt 1, and when the slide column 5 moves in the horizontal part of the guide groove 4, the height position of the second conveyor belt 2 remains unchanged, and the baffle 10 moves horizontally on the upper surface of the second conveyor belt 2.

[0021] When in use, the first conveyor belt 1 and the second conveyor belt 2 are running, and the second conveyor belt 2 is driven to run by the transmission roller 7 and the motor 9. The first conveyor belt 1 moves the plastic pallet horizontally toward the second conveyor belt 2. At this time, the first conveyor belt 1 and the second conveyor belt 2 are located at the same height, and the slide column 5 is located in the inclined part of the guide groove 4. When the pallet moves onto the second conveyor belt 2 and contacts the baffle 10, due to the friction between the pallet and the upper surface of the second conveyor belt 2, the pallet will push the baffle 10 to move laterally. At this time, the baffle 10 will drive the vertical plate 6 to move laterally, and the vertical plate 6 will drive the slide column 5 to move in the inclined part of the guide groove 4. The second conveyor belt 2, the baffle 10 and the pallet move upward synchronously, thereby making the second conveyor belt 2 higher than the first conveyor belt 1, and the second conveyor belt 2 moves toward the first conveyor The end of belt 1 will block the pallet on the first conveyor belt 1, thereby preventing the next pallet from moving onto the second conveyor belt 2, and realizing the conveying work of the second conveyor belt 2 for only one pallet. The movement of the vertical plate 6 in the vertical direction will drive the movable frame 8 to slide vertically on the U-shaped frame 3. When the slide column 5 moves to the horizontal part of the guide groove 4, the second conveyor belt 2 stops moving in the vertical direction. At this time, the baffle 10 and the pallet move smoothly horizontally. When the baffle 10 moves to the specified position, it stops moving. At this time, the baffle 10 blocks the movement of the pallet, and the pallet and the second conveyor belt 2 slide relative to each other. The worker or the robot arm can remove the pallet that has reached the specified position, thereby utilizing the vertical movement of the second conveyor belt 2 and the blocking of the pallet on the first conveyor belt 1 by its end to realize the conveying of the pallets one by one.

[0022] It should be pointed out that since the structures such as the movable frame 8, the transmission roller 7, the motor 9, the U-shaped frame 3, and the second conveyor belt 2 all have weight, in order to ensure that the second conveyor belt 2 is pushed by the friction force of the pallet and moves in the vertical direction, the conventional method in the field can be adopted to add springs and other structures to the movable frame 8 and the structure thereon, so as to reduce the influence of gravity on the movement of the second conveyor belt 2. When the pallet on the second conveyor belt 2 is removed, the vertical plate 6 is moved horizontally and reset. The conveying speed of the second conveyor belt 2 is generally slightly higher than that of the first conveyor belt 1, which can achieve the effect of separating the two pallets. The fixing structure and method of the first conveyor belt 1 can adopt a conventional structural method, which will not be elaborated here.

[0023] By designing a special conveying structure, the first conveyor belt 1 and the second conveyor belt 2 do not need to be started and stopped frequently, thereby reducing equipment fatigue damage; the vertical movement of the second conveyor belt 2 is used to make the end of the second conveyor belt 2 higher than the first conveyor belt 1, so that the second conveyor belt 2 blocks the pallets on the first conveyor belt 1, thereby realizing the one-by-one conveying of the pallets. This structural method does not need to set up other structural methods for blocking the pallets, and only needs to use the second conveyor belt 2. Therefore, the second conveyor belt 2 realizes both the conveying function and the blocking function, and this method can effectively avoid the risk of position displacement or falling caused by mutual interference of pallets in the traditional method, thereby improving the stability and accuracy of the conveying process; this solution simplifies the complicated operating steps in the traditional conveying process, making the entire conveying process smoother, reducing unnecessary intermediate links, and is conducive to improving overall work efficiency; in summary, this automatic one-by-one conveying structure for plastic pallets improves production efficiency while also taking into account the advantages of equipment maintenance, ease of operation and safety.

[0024] Furthermore, a pushing unit is provided on the U-shaped frame 3, and the pushing unit is used to provide a constant lateral thrust for the vertical plate 6; The pushing unit includes a transverse cylinder 11 and a fixing frame 12 located inside the U-shaped frame 3. The transverse cylinder 11 is fixed on the U-shaped frame 3 through the fixing frame 12. Two pistons 13 are slidably arranged in the transverse cylinder 11. An oil inlet pipe 14 and an oil discharge pressure regulating valve 15 are connected to the middle of the transverse cylinder 11. The oil inlet pipe 14 and the oil discharge pressure regulating valve 15 are both located between the two pistons 13. The front and rear side walls of the U-shaped frame 3 are both provided with transmission units, which are connected to the piston 13. When the piston 13 moves in the horizontal cylinder 11 due to hydraulic pressure, the piston 13 pushes the vertical plate 6 to move horizontally through the transmission unit.

[0025] In detail, the oil inlet pipe 14 is used to continuously supply hydraulic oil to the space between the two pistons 13 in the transverse cylinder 11, and the oil discharge pressure regulating valve 15 is used to discharge the excess hydraulic oil, so that the pressure of the hydraulic oil between the two pistons 13 can be ensured to be constant, and the pressure of the hydraulic oil between the two pistons 13 can be adjusted by adjusting the oil discharge pressure regulating valve 15. The constant thrust of the hydraulic oil in the transverse cylinder 11 on the piston 13 can be transmitted to the vertical plate 6 through the transmission unit. When the pallet on the second conveyor belt 2 uses friction to push the baffle 10 to move, the baffle 10 and the vertical plate 6 overcome the pressure of the hydraulic oil and move. At this time, the two pistons 13 approach each other, and the excess hydraulic oil between the two pistons 13 is discharged through the oil discharge pressure regulating valve 15. When the pallet is removed from the second conveyor belt 2, the hydraulic oil in the transverse cylinder 11 can push the piston 13 to reset, thereby resetting the vertical plate 6 and the baffle 10.

[0026] It should be pointed out that by providing constant pressure through hydraulic oil, a constant thrust can always be provided to the vertical plate 6 at any position and in any state, thereby avoiding the situation where the traditional spring structure cannot provide a constant thrust to the vertical plate 6, resulting in changes in the force and movement state between the baffle 10 and the tray.

[0027] Further, the transmission unit includes two first sprockets 16 and one second sprocket 17 rotatably mounted on the side wall of the U-shaped frame 3, and the two first sprockets 16 and the one second sprocket 17 are transmitted through a transmission chain 18, and the upper surface of the transmission chain 18 is horizontal, and a connecting frame 21 is vertically arranged on the upper surface of the transmission chain 18, and the connecting frame 21 is vertically slidably mounted on the vertical plate 6; A threaded sleeve 19 is provided in the middle of the second sprocket 17, the threaded sleeve 19 passes through the second sprocket 17 and the U-shaped frame 3, the threaded sleeve 19 is fixedly connected to the second sprocket 17, the threaded sleeve 19 is rotatably connected to the U-shaped frame 3, a threaded rod 20 is threadedly inserted in the threaded sleeve 19, and the threaded rod 20 is fixedly connected to a piston 13 in the horizontal cylinder 11; The cross-sectional shape of the horizontal cylinder 11 and the shape of the piston 13 are both square.

[0028] In detail, due to the shape limitation of the transverse cylinder 11 and the piston 13, the piston 13 cannot rotate in the transverse cylinder 11, and therefore the threaded rod 20 cannot rotate. Thus, when the vertical plate 6 moves in the horizontal direction, it will drive the transmission chain 18, the first sprocket 16 and the second sprocket 17 to rotate through the connecting frame 21. The second sprocket 17 will drive the threaded sleeve 19 to rotate. The threaded sleeve 19 and the threaded rod 20 rotate relative to each other, and the threaded sleeve 19 pushes the threaded rod 20 to move along the axis of the threaded rod 20. The threaded rod 20 will push the piston 13 to slide in the transverse cylinder 11. Thus, the hydraulic oil in the transverse cylinder 11 provides a constant driving force for the vertical plate 6. Since the vertical plate 6 needs to move in the vertical direction, the connecting frame 21 and the vertical plate 6 need to be connected in a relative sliding manner.

[0029] Furthermore, a support frame 22 is provided on the front and rear side walls of the U-shaped frame 3, a sliding sleeve 23 is provided on the support frame 22, the sliding sleeve 23 and the support frame 22 are locked by bolts, and a first limit plate 24 is provided on the sliding sleeve 23 for limiting the lateral movement position of the connecting frame 21.

[0030] In detail, when the connecting frame 21 and the vertical plate 6 move laterally, the connecting frame 21 will contact the first limiting plate 24. At this time, the first limiting plate 24 limits the lateral movement position of the connecting frame 21, that is, it limits the designated position to which the pallet is transported. When the designated position needs to be adjusted, the bolts between the sliding sleeve 23 and the support frame 22 can be loosened and the sliding sleeve 23 can be slid to adjust the position of the first limiting plate 24.

[0031] Furthermore, the support frame 22 is horizontally slidably mounted on the U-shaped frame 3, and the sliding direction of the support frame 22 is perpendicular to the conveying direction of the second conveyor belt 2. The support frame 22 and the U-shaped frame 3 are connected via a first cylinder 25, and a second limit plate 26 is provided on the support frame 22. The baffle 10 is provided with a fixing groove, and a laser rangefinder 27 is arranged in the fixing groove.

[0032] In detail, when the pallet is transported to the second conveyor belt 2, the pallet contacts the side wall of the baffle 10. If the pallet tilts on the second conveyor belt 2, the laser rangefinder 27 detects that the distance between it and the pallet exceeds a predetermined value, that is, the pallet is not in surface contact with the baffle 10. At this time, the first cylinder 25 contracts, and the first cylinder 25 pulls the support frame 22 to slide on the U-shaped frame 3, and the second limit plate 26 moves to a position capable of blocking the connecting frame 21. As a result, the connecting frame 21, the vertical plate 6 and the baffle 10 cannot move laterally. At this time, the second conveyor belt 2 and the first conveyor belt 1 will continue to run, and the friction force can be used to gradually straighten the pallet and make surface contact with the baffle 10. At this time, the first cylinder 25 extends and pushes the support frame 22 to reset, and the second limit plate 26 stops blocking the connecting frame 21.

[0033] It should be pointed out that when the support frame 22 moves, the first limit plate 24 will move synchronously. To ensure that the first limit plate 24 can still play a positioning effect when the second limit plate 26 no longer plays a blocking role, the length of the first limit plate 24 needs to be greater than the length of the second limit plate 26, and the first limit plate 24 will not contact the side wall of the U-shaped frame 3.

[0034] Furthermore, a pressure plate 28 is provided on the top of the baffle 10 .

[0035] In detail, when the first conveyor belt 1 and the second conveyor belt 2 are conveying pallets, in order to prevent the next pallet from being unable to move onto the second conveyor belt 2, it is necessary to move the second conveyor belt 2 up when the previous pallet has not yet completely moved onto the second conveyor belt 2, that is, the pallet needs to contact the baffle 10 in advance. At this time, since only a part of the pallet is on the second conveyor belt 2, the pallet is prone to tipping over and falling off. At this time, the friction force of the pressure plate 28 and the second conveyor belt 2 on the pallet can be used to conveniently limit the extrusion of the pallet, thereby preventing the pallet from tilting and sliding.

[0036] Furthermore, a support platform 29 is fixed on the pressure plate 28, and a second cylinder 30 is provided on the side wall of the baffle 10, and the movable end of the second cylinder 30 is rotatably connected to the support platform 29 via a connecting rod 31; The pressure plate 28 is rotatably mounted on the baffle 10 .

[0037] In detail, the second cylinder 30 is located on the back side of the baffle 10. When the pallet moves to the specified position, the second cylinder 30 extends and pulls the pressure plate 28 to rotate on the baffle 10 through the connecting rod 31 and the support 29. At this time, the pressure plate 28 rotates from a horizontal state to a vertical state, and the pressure plate 28 stops blocking the pallet, thereby facilitating the smooth removal of the pallet.

[0038] Furthermore, a limit block 32 is fixed on the connecting rod 31 , and the limit block 32 is located between the second cylinder 30 and the support platform 29 . When the pressing plate 28 is horizontal, the limit block 32 contacts the upper surface of the pressing plate 28 .

[0039] In detail, when the second cylinder 30 contracts and uses the connecting rod 31 and the support 29 to pull the pressure plate 28 to rotate to a horizontal state, the limit block 32 contacts the upper surface of the pressure plate 28. At this time, the limit block 32 limits the pressure plate 28 and the connecting rod 31, thereby positioning the horizontal position of the pressure plate 28.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A plastic pallet automatic conveying structure, characterized in that: It includes a first conveyor belt, a second conveyor belt and a U-shaped frame, the first conveyor belt and the second conveyor belt are both used to convey plastic pallets, the U-shaped frame is located below the first conveyor belt, and guide grooves are provided on the front and rear side walls of the U-shaped frame, the guide grooves are composed of a horizontal part and a downwardly inclined part, and the inclined part is located on the U-shaped frame on a side close to the first conveyor belt, a sliding column is slidably provided in the guide groove, and a vertical plate is vertically provided on the sliding column; The second conveyor belt is provided with two driving rollers for driving the second conveyor belt to run, and a mobile frame is vertically slidably provided on both the front and rear sides of the top of the U-shaped frame, the driving roller is rotatably installed on the mobile frame, and the vertical plate is horizontally slidably installed on the side wall of the mobile frame, and a baffle is provided between the two vertical plates for blocking the plastic pallet on the second conveyor belt; Among them, when the first conveyor belt transports the plastic pallet to the second conveyor belt, the first conveyor belt and the second conveyor belt are on the same horizontal plane. When the plastic pallet is transported on the second conveyor belt, the second conveyor belt moves in the vertical direction, and the end of the second conveyor belt blocks the plastic pallet on the first conveyor belt. A motor for providing power to the second conveyor belt and the transmission roller is provided on a movable frame.

2. The automatic conveying structure for plastic pallets according to claim 1 is characterized in that: The U-shaped frame is provided with a pushing unit, and the pushing unit is used to provide a constant lateral thrust for the vertical plate; The pushing unit comprises a horizontal cylinder and a fixing frame located inside the U-shaped frame, the horizontal cylinder is fixed on the U-shaped frame through the fixing frame, two pistons are slidably arranged in the horizontal cylinder, an oil inlet pipe and an oil discharge pressure regulating valve are connected in the middle of the horizontal cylinder, and the oil inlet pipe and the oil discharge pressure regulating valve are both located between the two pistons; Wherein, transmission units are arranged on the front and rear side walls of the U-shaped frame, and the transmission units are connected to the piston. When the piston moves in the horizontal cylinder due to the hydraulic action, the piston pushes the vertical plate to move horizontally through the transmission unit.

3. The automatic conveying structure for plastic pallets according to claim 2 is characterized in that: The transmission unit comprises two first sprockets and one second sprocket rotatably mounted on the side wall of the U-shaped frame, the two first sprockets and the second sprocket are driven by a transmission chain, and the upper surface of the transmission chain is horizontal, a connecting frame is vertically arranged on the upper surface of the transmission chain, and the connecting frame is vertically slidably mounted on the vertical plate; A threaded sleeve is provided in the middle of the second sprocket, the threaded sleeve passes through the second sprocket and the U-shaped frame, the threaded sleeve is fixedly connected to the second sprocket, the threaded sleeve is rotatably connected to the U-shaped frame, a threaded rod is threadedly inserted in the threaded sleeve, and the threaded rod is fixedly connected to a piston in the horizontal cylinder; Wherein, the cross-sectional shape of the horizontal cylinder and the shape of the piston are both square.

4. The automatic conveying structure for plastic pallets one by one according to claim 3 is characterized in that: The front and rear side walls of the U-shaped frame are both provided with support frames, the sliding sleeve on the support frame is provided with a sliding sleeve, the sliding sleeve and the support frame are locked by bolts, and the sliding sleeve is provided with a first limit plate for limiting the lateral movement position of the connecting frame.

5. The automatic conveying structure for plastic pallets one by one according to claim 4 is characterized in that: The support frame is horizontally slidably mounted on the U-shaped frame, and the sliding direction of the support frame is perpendicular to the conveying direction of the second conveyor belt. The support frame and the U-shaped frame are connected via a first cylinder, and a second limit plate is provided on the support frame; The baffle is provided with a fixing groove, in which a laser rangefinder is arranged.

6. The automatic conveying structure for plastic pallets one by one according to claim 5, characterized in that: A pressure plate is arranged on the top of the baffle.

7. The automatic conveying structure for plastic pallets one by one according to claim 6, characterized in that: A support platform is fixed on the pressure plate, a second cylinder is arranged on the side wall of the baffle, and the movable end of the second cylinder is rotatably connected to the support platform through a connecting rod; Wherein, the pressure plate is rotatably mounted on the baffle plate.

8. The automatic conveying structure for plastic pallets one by one according to claim 7, characterized in that: A limiting block is fixed on the connecting rod, and the limiting block is located between the second cylinder and the support platform. When the pressing plate is horizontal, the limiting block contacts the upper surface of the pressing plate.

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