A method and device for conveying and loading the surrounding plates of a plastic pallet

Abstract

The present invention discloses a method and device for conveying and feeding the side plates of a plastic pallet. The device used in the method includes a conveyor belt body, a limiting device, a flattening device and a lifting device. A lifting device is erected directly above the feeding end of the conveyor belt body. A flattening device is provided at the discharging end of the conveyor belt body. A limiting device is arranged between the lifting device and the flattening device. The lifting device includes a translation track, a lifting fixing frame and a lifting suction component. The flattening device includes an upper blowing component and a lower suction component. The lower suction component is arranged between the conveying rollers of the conveyor belt. The upper blowing component is erected directly above the conveyor belt. By means of the lifting device, the tail of the strip-shaped plate is lifted, facilitating the transfer of the second plate from the tail of the first plate onto the conveyor belt body, forming a state where the tail of the first plate floats above the second plate, solving the problem of the asymmetric feeding speeds of the second plate and the first plate, and reducing the length requirement of the conveyor belt.

Description

Technical Field

[0001] The present invention relates to the field of conveying, and particularly to a method and device for conveying and loading plastic pallet side plates. Background Art

[0002] When processing pallet side plates, it is necessary to cut and trim the long strip-shaped sheet material to make the edges of the sheet material flat, and then transfer it to a heating device through a conveying device for heating. Immediately afterwards, it is necessary to bend and weld the unformed long plate through a bending and welding device. After cooling, a finished pallet side plate is formed. During this process, due to the different feeding speeds of the trimming device and the bending and welding device, it is necessary to set up a transfer conveying device for docking between the two devices. Since the feeding speed of the sheet material on the transfer conveyor to the bending and welding device is different from the discharging speed of the trimming device, the sheet material produced by the trimming device may interfere with or overlap the sheet material on the transfer conveyor. In the above two cases, the two sheet materials will rub against each other, easily causing scratches. The existing processing is to reserve a sufficiently long conveying channel in the middle transfer section to extend the conveying time to meet the time difference in the middle. However, a sufficiently long conveying channel results in a large floor area of the equipment, high requirements for the production environment, and at the same time, a longer conveyor belt also brings more equipment costs and maintenance costs. It should be noted that generally, the manufactured enclosure boxes are rectangular or square, and the length and width of the enclosure boxes after being manufactured are 120 cm - 150 cm. Therefore, the minimum length of the sheet material to be processed is 480 cm, and the height of the enclosure box depends on the width of the sheet material.

[0003] Another solution in the prior art is: set a storage position and another conveying device. The trimmed sheet material is loaded onto the storage position. After the sheet material on the conveying device completely enters the bending and welding device, the sheet material at the storage position is transferred to the conveying device through a transfer device. However, due to the too long length of the sheet material, the sheet material will bend or even break during transfer. Therefore, a sufficiently large transfer device is required, which undoubtedly increases the production cost. Summary of the Invention

[0004] The main object of the present invention is to provide a method and device for conveying and loading plastic pallet side plates.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A method for conveying and loading plastic pallet side plates includes the steps:

[0007] S1, a trimming device docked at the front end of the conveyor belt body of the transfer trims the side plates of the enclosure and loads them onto the conveyor belt body of the transfer;

[0008] S2. The transfer conveyor belt body completely transfers the trimmed sheet material onto the conveyor belt body, then aligns the sheet material through the limiting device, and waits for the preparation of the rear-end bending and welding device to be completed;

[0009] S3. The trimming device continues to trim and load the sheet material onto the conveyor belt body. To prevent the first sheet material from interfering with the loading of the second sheet material, the tail of the first sheet material is lifted by the lifting device so that the tail of the first sheet material is in a suspended state and does not form a stack with the second sheet material;

[0010] S4. After the bending and welding device is prepared, the lifting device cooperates with the conveyor belt body and the leveling device to keep the tail end of the sheet material in a lifted state during loading until it is near the leveling device. At this time, since the feeding speed of the first sheet material into the bending and welding device is greater than the discharging speed of the second sheet material, the first sheet material will no longer affect the normal feeding of the second sheet material. At this time, release the tail of the first sheet material to allow it to feed into the bending and welding device normally;

[0011] S5. The first sheet material completely enters the bending and welding device for welding, and after the welding is completed, the finished product is unloaded;

[0012] S6. Repeat steps S2 - S5 to complete the processing of the long strip-shaped enclosure.

[0013] Furthermore, the device applying this method includes a conveyor belt body, a limiting device, a leveling device, and a lifting device. The front end of the conveyor belt body is connected to the trimming device, and the tail end of the conveyor belt is connected to the bending and welding device. The conveyor belt body is a conveyor roller type conveyor belt. A lifting device is installed directly above the feeding end of the conveyor belt body. The lifting device is used to lift the tail of the first sheet material. Due to a certain difference in the feeding speeds of the first sheet material and the second sheet material, to prevent the first sheet material from interfering with the normal feeding of the second sheet material, the tail of the first sheet material is lifted by the lifting device to make the tail of the first sheet material suspended. In this way, the second sheet material can be normally fed onto the conveyor belt body. A leveling device is provided at the discharging end of the conveyor belt body. The leveling device is used to stably connect to the first sheet material of the bending and welding device to prevent the tail of the first sheet material from lifting and causing the first sheet material to shift. A limiting device is provided between the lifting device and the leveling device. The limiting device is used to further prevent the sheet material from shifting during the feeding process. The lifting device includes a translation track, a lifting fixed frame, and a lifting suction component. The translation track is provided on both sides of the conveyor belt body. A fixed block is slidably provided on the translation track. A gantry-type lifting fixed frame is fixedly installed on the fixed block. A lifting suction component is fixedly installed on the lifting fixed frame. The leveling device includes an upper blowing component and a lower suction component. The lower suction component is provided between the conveyor rollers of the conveyor belt, and the upper blowing component is installed directly above the conveyor belt.

[0014] Furthermore, the lifting and material suction assembly includes a material suction sucker group, a sucker fixing frame, a lifting air cylinder, a guide rod and a linear guide sleeve. The lifting air cylinder is fixedly installed on the lifting fixing frame. The cylinder head of the lifting air cylinder passes through the lifting fixing frame and is fixedly connected to the sucker fixing frame. The material suction sucker group is fixedly installed on the sucker fixing frame. On the upper end faces of both sides of the sucker fixing frame, guide rods are fixedly installed. Linear guide sleeves are slidably sleeved on the guide rods. The linear guide sleeves pass through the lifting fixing frame and are fixedly installed with the lifting fixing frame.

[0015] Furthermore, the material suction sucker group is composed of several suckers, and the several suckers are fixedly installed on the sucker fixing frame along the transverse direction of the conveyor belt.

[0016] Furthermore, there are two limiting devices, and the two limiting devices are symmetrically installed on both sides of the conveyor belt body. The limiting device includes a limiting fixing frame, a limiting air cylinder and a limiting push plate. The limiting fixing frame is fixedly installed on the fixing frame of the conveyor belt body. The limiting air cylinder is fixedly installed on the limiting fixing frame. The cylinder head of the limiting air cylinder passes through the limiting fixing frame and is fixedly connected to the limiting push plate.

[0017] Furthermore, the lower material suction assembly includes a lower negative pressure seat and an upper negative pressure fixing plate fixedly installed on the lower negative pressure seat. On the upper end face of the upper negative pressure fixing plate, there are several negative pressure suction heads placed between the conveyor rollers of the conveyor belt body. On the upper end face of the negative pressure suction head, a negative pressure groove is opened. Several negative pressure holes are fixedly opened in the negative pressure groove. The negative pressure holes penetrate through the upper negative pressure fixing plate and are communicated with the negative pressure chamber in the lower negative pressure seat. A negative pressure connection hole is opened on the side end face of the lower negative pressure seat.

[0018] Furthermore, the upper blowing component includes a blowing fixing frame, a blowing pressurizing air chamber and strip-shaped duckbill nozzles. The blowing fixing frame is fixedly arranged on both sides of the conveyor belt body. The blowing pressurizing air chamber is fixedly installed on the blowing fixing frame. Several strip-shaped duckbill nozzles arranged along the feeding direction of the conveyor belt are fixedly installed directly below the blowing pressurizing air chamber.

[0019] Furthermore, rubber sleeves are covered on the outer ring surfaces of the conveyor rollers provided on the conveyor belt body, and printing grooves for increasing friction are provided on the outer surfaces of the rubber sleeves.

[0020] Further, at both ends of the lower end surface of the blowing and pressurizing air chamber along the feeding direction of the conveyor belt, a friction prevention assembly is transversely provided. The friction prevention assembly includes a semi-open fixing frame, a limiting roller, a limiting cover plate, a movable limiting block, a guiding slide rod, and a return spring. An installation groove is formed on the semi-open fixing frame, and a vertically erected guiding slide rod is fixedly installed in the installation groove. The movable limiting block is divided into upper and lower parts, and a bearing fixing groove is formed between the two movable limiting blocks. A bearing is fixedly installed in the bearing fixing groove, and the bearing is rotatably connected to the limiting roller. A sliding connection through hole is further formed on the movable limiting block, and the movable limiting block is sleeved on the guiding slide rod through the sliding connection through hole. The return spring is also sleeved on the guiding slide rod.

[0021] Further, the lowest height of the friction prevention assembly at the feeding end of the blowing and pressurizing air chamber is lower than the lowest height of the friction prevention assembly at the discharging end of the blowing and pressurizing air chamber.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] The present invention lifts the tail of the sheet material in the feeding direction through the lifting device and performs auxiliary displacement, so that the front end of the feeding section of the second sheet material can be inserted under the first sheet material, and there will be no stacking and interference between the first sheet material and the second sheet material, which can prevent the mutual friction of the two sheet materials, improve the surface integrity effect, and at the same time reduce the length of the conveyor belt and improve the space utilization rate.

[0024] Through the flattening device, not only can the sheet material be pressed on the conveying roller of the conveyor belt by the blowing force on the upper part of the sheet material, but also the friction force between the sheet material and the conveying roller can be further increased by the suction force on the lower part to prevent the sheet material from skipping. At the same time, it can cooperate with the lifting device to limit the feeding direction end of the sheet material to prevent the feeding end of the sheet material from being lifted due to the lifting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a top view schematic diagram of the present invention;

[0026] Figure 2 is a top view schematic diagram of the present invention with the upper blowing component structure removed;

[0027] Figure 3 is a front view structural schematic diagram of the present invention;

[0028] Figure 4 For the present invention Figure 2 is an enlarged view of part A;

[0029] Figure 5 For the present invention Figure 2 is an enlarged view of part B;

[0030] Figure 6 For the present invention Figure 3Enlarged view at position C

[0031] Reference numerals:

[0032] 1. Conveyor belt body; 2. Limiting device; 3. Flattening device; 4. Lifting device; 41. Translation track; 42. Lifting fixing frame; 43. Lifting suction component; 44. Fixed block; 31. Upper blowing component; 32. Lower suction component; 432. Suction cup fixing frame; 433. Lifting air cylinder; 434. Guide rod; 435. Linear guide sleeve; 21. Limiting fixing frame; 22. Limiting air cylinder; 23. Limiting push plate; 321. Lower negative pressure seat; 322. Upper negative pressure fixing plate; 323. Negative pressure suction head; 324. Negative pressure groove; 325. Negative pressure hole; 311. Blowing fixing frame; 312. Blowing pressurizing air chamber; 313. Strip-shaped duckbill nozzle; 33. Anti-friction component; 331. Semi-open fixing frame; 332. Limiting roller; 333. Limiting cover plate; 334. Movable limiting block; 335. Guide slide bar; 336. Return spring. Detailed implementation manners

[0033] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined. Embodiment 1

[0034] A method for feeding plastic pallet side plates during conveying, characterized by comprising the steps of:

[0035] S1. The trimming device docked at the front end of the conveyor belt body for transfer trims the side plate sheets and feeds them onto the conveyor belt body for transfer;

[0036] S2. The conveyor belt body for transfer completely conveys the trimmed sheet material onto the conveyor belt body, and then the limiting device is used to align the sheet material and wait for the preparation of the rear-end bending and welding device to be completed;

[0037] S3. The trimming device continues to trim and feed the sheet material onto the conveyor belt body. To prevent the first sheet material from interfering with the feeding of the second sheet material, the tail of the first sheet material is lifted by the lifting device so that the tail of the first sheet material is in a suspended state and does not form a stack with the second sheet material;

[0038] S4. After the preparation of the bending and welding device is completed, the lifting device cooperates with the conveyor belt body and the flattening device to keep the tail end of the sheet material in a lifted state during feeding until it is near the flattening device. At this time, since the feeding speed of the first sheet material into the bending and welding device is greater than the discharging speed of the second sheet material, the first sheet material will no longer affect the normal feeding of the second sheet material. At this time, the tail of the first sheet material is released to allow it to feed into the bending and welding device normally;

[0039] In S5, the first sheet metal completely enters the bending and welding device for welding. After welding is completed, the finished product is discharged.

[0040] In S6, steps S2 - S5 are repeated to complete the processing of the long strip-shaped enclosure panel. Embodiment 2

[0041] Refer to Figures 1-6 As shown, a plastic pallet enclosure panel conveying and loading device includes a conveyor belt body 1 for loading sheet metal and limiting the overall structure, a limiting device 2 for limiting the position of the sheet metal relative to the center of the conveyor belt body 1 during loading, a flattening device 3 for stabilizing the sheet metal when it is loaded to the next station, and preventing the sheet metal from warping due to the lifting device 4, and a lifting device 4 for lifting the tail of the sheet metal in the loading direction to facilitate avoiding the normal loading of the second sheet metal. The conveyor belt body 1 is a conveyor belt of the conveyor roller type. A lifting device 4 is erected directly above the loading end of the conveyor belt body 1. A flattening device 3 is provided at the discharging end of the conveyor belt body 1. A limiting device 2 is provided between the lifting device 4 and the flattening device 3. The lifting device 4 includes a translation track 41, a lifting fixed frame 42, and a lifting suction component 43. The translation track 41 is provided on both sides of the conveyor belt body 1. A fixed block 44 is slidably provided on the translation track 41. A gantry-type lifting fixed frame 42 is fixedly installed on the fixed block 44. A lifting suction component 43 is fixedly installed on the lifting fixed frame 42. The flattening device 3 includes an upper blowing component 31 and a lower suction component 32. The lower suction component 32 is provided between the conveyor rollers of the conveyor belt. The upper blowing component 31 is erected directly above the conveyor belt.

[0042] The lifting suction component 43 includes a suction cup group, a suction cup fixed frame 432, a lifting cylinder 433, a guide rod 434, and a linear guide sleeve 435. The lifting cylinder 433 is fixedly installed on the lifting fixed frame 42. The cylinder head of the lifting cylinder 433 passes through the lifting fixed frame 42 and is fixedly connected to the suction cup fixed frame 432. A suction cup group is fixedly installed on the suction cup fixed frame 432. Guide rods 434 are fixedly installed on the upper end faces on both sides of the suction cup fixed frame 432. Linear guide sleeves 435 are slidably sleeved on the guide rods 434. The linear guide sleeves 435 pass through the lifting fixed frame 42 and are fixedly installed with the lifting fixed frame 42.

[0043] The adsorption of the sheet metal is realized through the suction cup group, so as to facilitate the lifting of the tail end of the sheet metal in the loading direction, and the translation track 41 drives the sheet metal to assist in uniform loading. The loading speed of the translation track 41 is the same as the loading speed of the second conveyor belt at the tail of the conveyor belt.

[0044] The suction cup group is composed of several suction cups, and the several suction cups are fixedly installed on the suction cup fixed frame 432 along the transverse direction of the conveyor belt.

[0045] There are two limiting devices 2, and the two limiting devices 2 are symmetrically installed on both sides of the conveyor belt body 1. The limiting device 2 includes a limiting fixing frame 21, a limiting cylinder 22 and a limiting push plate 23. The limiting fixing frame 21 is fixedly installed on the fixing frame of the conveyor belt body 1. The limiting cylinder 22 is fixedly installed on the limiting fixing frame 21, and the cylinder head of the limiting cylinder 22 passes through the limiting fixing frame 21 and is fixedly connected to the limiting push plate 23.

[0046] The lower material suction component 32 includes a lower negative pressure seat 321 and an upper negative pressure fixing plate 322 fixedly installed on the lower negative pressure seat 321. A plurality of negative pressure suction heads 323 are arranged between the conveying rollers of the conveyor belt body 1 on the upper end surface of the upper negative pressure fixing plate 322. A negative pressure groove 324 is formed on the upper end surface of the negative pressure suction head 323, and a plurality of negative pressure holes 325 are fixedly formed in the negative pressure groove 324. The negative pressure holes 325 penetrate through the upper negative pressure fixing plate 322 and communicate with the negative pressure chamber in the lower negative pressure seat 321. A negative pressure connection hole is formed on the side end surface of the lower negative pressure seat 321.

[0047] The upper blowing component 31 includes a blowing fixing frame 311, a blowing pressurizing chamber 312 and a strip-shaped duckbill nozzle 313. The blowing fixing frame 311 is fixedly installed on both sides of the conveyor belt body 1. The blowing pressurizing chamber 312 is fixedly installed on the blowing fixing frame 311, and a plurality of strip-shaped duckbill nozzles 313 arranged along the conveyor belt feeding direction are fixedly installed directly below the blowing pressurizing chamber 312.

[0048] After the tail end of the first sheet is lifted, the second sheet can be loaded, and the first sheet will not be completely lifted under the influence of the leveling device 3, thus facilitating the loading of the first sheet.

[0049] Rubber sleeves are covered on the outer ring surfaces of the conveying rollers provided on the conveyor belt body 1, and printing grooves for increasing friction are provided on the outer surfaces of the rubber sleeves.

[0050] Two anti-friction components 33 are horizontally arranged at both ends of the lower end surface of the blowing pressurizing chamber 312 along the conveyor belt feeding direction. The anti-friction component 33 includes a semi-open fixing frame 331, a limiting roller 332, a limiting cover plate 333, a movable limiting block 334, a guiding slide rod 335 and a return spring 336. An installation groove is formed on the semi-open fixing frame 331, and a vertical guiding slide rod 335 is fixedly installed in the installation groove. The movable limiting block 334 is divided into upper and lower parts, and a bearing fixing groove is formed between the two movable limiting blocks 334. A bearing is fixedly installed in the bearing fixing groove, and the bearing is rotatably connected to the limiting roller 332. A sliding connection through hole is also formed on the movable limiting block 334, and the movable limiting block 334 is sleeved on the guiding slide rod 335 through the sliding connection through hole. The return spring 336 is also sleeved on the guiding slide rod 335.

[0051] The upper end surface of the sheet material is prevented from rubbing against the upper blowing component 31 by the anti-friction component 33. Moreover, through the cooperation of the return spring 336, the guiding slide rod 335 and the movable limit block 334, sheet materials of different thicknesses can be adapted, thus facilitating the matching of sheet materials of different thicknesses.

[0052] The lowest height of the anti-friction component 33 at the feeding end of the blowing pressure-increasing air chamber 312 is lower than the lowest height of the anti-friction component 33 at the discharging end of the blowing pressure-increasing air chamber 312.

[0053] Working principle:

[0054] The device of the present application is a transfer device connecting the trimming device and the bending and welding device. That is, the front end of the conveyor belt body is connected to the trimming device, and the tail end is connected to the bending and welding device. Since the bending and welding device only needs to feed four sections, and the feeding speed of the four-section feeding is relatively fast, while the trimming device needs to discharge materials in multiple steps. That is, the feeding speed of the bending and welding device in the early stage is greater than the discharging speed of the trimming device. However, the time for the last step of welding and discharging of the bending and welding device prolongs the overall time for the bending and welding device to process the sheet material. When the bending and welding device is performing the final work of processing the first sheet material and discharging it, the second sheet material has already completed the trimming work and has been fed onto the conveyor belt body. The third sheet material starts the trimming process and is discharged onto the conveyor belt body. When the third sheet material is being fed, in order to prevent the tail of the second sheet material from colliding with the head of the third sheet material during feeding, the tail of the second sheet material is lifted by the lifting device. By lifting the tail of the second sheet material with the lifting device, the tail of the second sheet material is suspended in the air. In this way, the third sheet material can be normally fed onto the conveyor belt body;

[0055] The limiting device is used to position the center line of the second sheet material after the second sheet material is placed on the conveyor belt body, preventing the second sheet material from tilting or shifting.

[0056] After the second sheet material is positioned by the limiting device, the leveling device is started to closely fit the head of the second sheet material to the conveyor belt body, preventing the second sheet material from slipping between the second sheet material and the conveyor belt body during the feeding process.

[0057] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modification or change made by those of ordinary skill in the art according to the disclosure of the present invention should be included in the protection scope recorded in the claims.

Claims

1. A plastic pallet enclosure conveying and loading device, characterized in that: The invention comprises a conveyor belt body (1), a limiting device (2), a leveling device (3) and a lifting device (4); the front end of the conveyor belt body (1) is connected to a trimming device, the rear end of the conveyor belt body (1) is connected to a bending and welding device, the conveyor belt body (1) is a conveyor roller type conveyor belt, and a lifting device (4) is arranged directly above the feeding end of the conveyor belt body (1), and the lifting device (4) is used to lift the rear end of the sheet material on the conveyor belt body (1) so that the rear end of the sheet material on the conveyor belt body (1) is lifted. The conveyor body (1) is suspended in the air, a leveling device (3) is provided at the discharge end of the conveyor body (1), a limiting device (2) is provided between the lifting device (4) and the leveling device (3), the lifting device (4) comprises a translation track (41), a lifting fixed frame (42) and a lifting suction assembly (43), the translation track (41) is arranged on both sides of the conveyor body (1), a fixed block (44) is slidably provided on the translation track (41), a gantry-type lifting fixed frame (42) is fixedly installed on the fixed block (44), and the lifting fixed frame (42) is provided on the lifting fixed frame (42). A lifting and sucking assembly (43) is fixedly mounted on the lifting fixed frame (42), the leveling device (3) comprises an upper blowing assembly (31) and a lower blowing assembly (32), the lower blowing assembly (32) is arranged between the conveyor belt and the conveyor rollers, and the upper blowing assembly (31) is erected directly above the conveyor belt; the lifting and sucking assembly (43) comprises a sucking suction cup group, a suction cup fixing frame (432), a lifting cylinder (433), a guide rod (434) and a linear guide sleeve (435), the lifting cylinder (433) is fixed The lifting cylinder (433) is mounted on a lifting fixed frame (42). The cylinder head of the lifting cylinder (433) passes through the lifting fixed frame (42) and is fixedly connected to a suction cup fixing frame (432). A suction cup group is fixedly mounted on the suction cup fixing frame (432). Guide rods (434) are fixedly mounted on the upper end surfaces of both sides of the suction cup fixing frame (432). A linear guide sleeve (435) is slidably sleeved on the guide rod (434). The linear guide sleeve (435) passes through the lifting fixed frame (42) and is fixedly mounted on the lifting fixed frame (42).

2. The device according to claim 1, characterized in that: The material suction cup group is composed of a plurality of suction cups, and the plurality of suction cups are fixedly mounted on a suction cup fixing frame (432) along the transverse direction of the conveyor belt.

3. The device according to claim 1, characterized in that: There are two limit devices (2), and the two limit devices (2) are symmetrically installed on both sides of the conveyor belt body (1). The limit device (2) comprises a limit fixing frame (21), a limit cylinder (22) and a limit push plate (23). The limit fixing frame (21) is fixedly installed on the fixing frame of the conveyor belt body (1), and the limit cylinder (22) is fixedly installed on the limit fixing frame (21). The cylinder head of the limit cylinder (22) passes through the limit fixing frame (21) and is fixedly connected to the limit push plate (23).

4. The device according to claim 1, characterized in that: The lower suction assembly (32) comprises a lower negative pressure seat (321) and an upper negative pressure fixing plate (322) fixedly mounted on the lower negative pressure seat (321); the upper end surface of the upper negative pressure fixing plate (322) is provided with a plurality of negative pressure suction heads (323) placed between the conveying rollers of the conveyor belt body (1); the upper end surface of the negative pressure suction head (323) is provided with a negative pressure groove (324); a plurality of negative pressure holes (325) are fixedly provided in the negative pressure groove (324); the negative pressure holes (325) penetrate the upper negative pressure fixing plate (322) and are connected with the negative pressure bin in the lower negative pressure seat (321); and the side end surface of the lower negative pressure seat (321) is provided with a negative pressure connection hole.

5. The device according to claim 1, characterized in that: The upper blowing assembly (31) comprises a blowing fixing frame (311), a blowing pressurizing air chamber (312) and a strip duckbill nozzle (313). The blowing fixing frame (311) is fixedly mounted on both sides of the conveyor belt body (1). The blowing pressurizing air chamber (312) is fixedly mounted on the blowing fixing frame (311). A plurality of strip duckbill nozzles (313) arranged along the feeding direction of the conveyor belt are fixedly mounted directly below the blowing pressurizing air chamber (312).

6. The device according to claim 1, characterized in that: The outer ring surfaces of the conveying rollers provided on the conveyor belt body (1) are all covered with rubber sleeves, and the outer surfaces of the rubber sleeves are provided with printed grooves for increasing friction.

7. The device according to claim 5, characterized in that: An anti-friction assembly (33) is transversely arranged at both ends of the lower end surface of the blowing and boosting air chamber (312) along the feeding direction of the conveyor belt, and the anti-friction assembly (33) comprises a semi-open fixed frame (331), a limiting roller (332), a limiting cover plate (333), a movable limiting block (334), a guide slide bar (335) and a return spring (336). An installation groove is provided on the semi-open fixed frame (331), and an upright guide slide bar (335) is fixedly installed in the installation groove. 335), the movable limit block (334) is divided into two upper and lower parts, and a bearing fixing groove is provided between the two movable limit blocks (334), a bearing is fixedly installed in the bearing fixing groove, and the bearing is rotatably connected to the limit roller (332), and a sliding connection through hole is also provided on the movable limit block (334), and the movable limit block (334) is sleeved on the guide slide bar (335) through the sliding connection through hole, and the guide slide bar (335) is also sleeved with a return spring (336).

8. The device according to claim 7, characterized in that: The lowest height of the anti-friction component (33) at the feeding end of the blowing and pressurizing air chamber (312) is lower than the lowest height of the anti-friction component (33) at the discharging end of the blowing and pressurizing air chamber (312).

9. A method for conveying and loading plastic pallet panels, characterized in that: The device according to any one of claims 1 to 8 is used to realize the conveying and loading of plastic pallet panels, and the specific steps include: S1, the trimming device connected to the front end of the transfer conveyor belt body trims the panel and loads it onto the transfer conveyor belt body; S2, the transfer conveyor belt body completely transfers the trimmed sheet to the conveyor belt body, and then aligns the sheet through the limit device, and waits for the preparation of the rear-end bending and welding device to be completed; S3, the trimming device continues trimming and loading the sheet onto the conveyor body. In order to prevent the first sheet from interfering with the loading of the second sheet, the tail of the first sheet is lifted by the lifting device so that the tail of the first sheet is suspended and does not form a stack with the second sheet; S4, after the bending and welding device is ready, the tail end of the sheet is kept in a lifted state for loading by means of the lifting device in cooperation with the conveyor belt body and the leveling device, until it is close to the leveling device. At this time, since the speed of loading the first sheet into the bending and welding device is greater than the discharging speed of the second sheet, the first sheet will not affect the normal loading of the second sheet. At this time, the tail of the first sheet is released to allow it to be normally fed into the bending and welding device; S5, the first sheet material is completely put into the bending and welding device for welding, and the finished product is unloaded after the welding is completed; S6, repeat steps S2-S5 to complete the processing of the long strip enclosure.

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