Buckling mechanism

Abstract

The utility model discloses a buckling mechanism, and relates to the technical field of sanitary towel piece arranging and conveying equipment, and the feeding end of a first negative pressure conveying assembly and the feeding end of a second negative pressure conveying assembly form the clamping feeding end of the buckling mechanism; a separation blade assembly is arranged at the separation position of the first negative pressure conveying assembly and the second negative pressure conveying assembly. Materials are input from the feeding end of the buckling mechanism, conveyed to the clamping belt conveying assembly through the first negative pressure conveying assembly and then conveyed to the third negative pressure conveying assembly through the clamping belt conveying assembly, and a first conveying path is formed. Materials are input from the feeding end of the buckling mechanism, stirred by the blocking piece assembly and then conveyed to the overturning belt conveying assembly through the second negative pressure conveying assembly in a negative pressure mode, the overturning belt conveying assembly overturns the materials while conveying the materials, the overturned materials enter the fourth negative pressure conveying assembly, and a second conveying path is formed. According to the utility model, the purpose of clamping conveying and overturning conveying by rapidly dividing flow between the two negative pressure conveying assemblies is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sanitary towel piece arranging and conveying equipment technical field, in particular to a buckle mechanism. BACKGROUND

[0002] Among many materials including daily necessities, for example, sanitary towels, when producing, many sanitary towels have uneven thickness on the left and right, which makes the sanitary towels stacked by the piece arranging machine also have different heights on the left and right, making the subsequent packaged products not very beautiful, and the packaging machine cannot send the stacked sanitary towels into the packaging bag and packaging box.

[0003] For example, a piece arranging and packaging machine with arranging wheels was published in Chinese patent document on February 28, 2020, which includes multiple piece arranging mechanisms, a multi-channel conveying mechanism, a multi-channel pushing mechanism, a multi-channel bagging mechanism, a multi-channel sealing mechanism, and a packaging bag conveying device. The packaging machine pushes the compressed product groups to the multi-channel conveying mechanism, so that the double-row piece arranging and multi-channel packaging machine can match the high-speed sanitary towel production line and form a multi-channel output form.

[0004] Therefore, it is necessary to buckle the materials on the conveying belt left and right to realize the left and right flipping of the materials during high-speed piece arranging and ensure the uniformity of the left and right heights of the materials when stacked. UTILITY MODEL CONTENT

[0005] In view of the above-mentioned problem in the prior art that the left and right heights of the materials are not uniform when stacked, affecting the packaging work, the utility model solves the technical problem of how to provide a buckle mechanism that can flip the materials left and right during piece arranging for easy stacking.

[0006] To solve the above technical problem, the utility model adopts the following technical solution: a buckle mechanism, including a first negative pressure conveying assembly, a second negative pressure conveying assembly, a clamping belt conveying assembly, a flipping belt conveying assembly, a third negative pressure conveying assembly, and a fourth negative pressure conveying assembly; the feeding ends of the first negative pressure conveying assembly and the second negative pressure conveying assembly are arranged oppositely to form the clamping feeding end of the buckle mechanism; the rear conveying section of the second negative pressure conveying assembly is inclined downward and separated from the first negative pressure conveying assembly; a baffle assembly is arranged at the separation of the first negative pressure conveying assembly and the second negative pressure conveying assembly to push the materials conveyed by the first negative pressure conveying assembly to the rear conveying end of the second negative pressure conveying assembly;

[0007] The output end of the first negative pressure conveying assembly is connected with the feeding end of the clamping belt conveying assembly, and the discharging end of the clamping belt conveying assembly is connected with the feeding end of the third negative pressure conveying assembly; the material is input from the feeding end of the buckling mechanism, conveyed by the first negative pressure conveying assembly to the clamping belt conveying assembly, then conveyed by the clamping belt conveying assembly to the third negative pressure conveying assembly, and conveyed by the third negative pressure conveying assembly, forming a first conveying path;

[0008] The output end of the second negative pressure conveying assembly is connected with the feeding end of the turnover belt conveying assembly, and the discharging end of the turnover belt conveying assembly is connected with the feeding end of the fourth negative pressure conveying assembly; the material is input from the feeding end of the buckling mechanism, and after being pushed by the baffle assembly, the material is conveyed by the second negative pressure conveying assembly to the turnover belt conveying assembly; the turnover belt conveying assembly conveys the material while turning over the material, and the turned-over material enters the fourth negative pressure conveying assembly and is continuously conveyed by the fourth negative pressure conveying assembly, forming a second conveying path.

[0009] Further, the output ends of the third negative pressure conveying assembly and the fourth negative pressure conveying assembly are arranged oppositely to form the discharging end of the buckling mechanism, that is, the first conveying path and the second conveying path converge at the discharging end of the buckling mechanism.

[0010] Further, the baffle assembly comprises a baffle driving motor, a rotating shaft and baffles arranged on the rotating shaft, the rotating shaft is connected with the output shaft of the baffle driving motor, and the baffle driving motor drives the baffles to reciprocate, so as to push the material conveyed by the first negative pressure conveying assembly to the rear conveying section of the second negative pressure conveying assembly.

[0011] Further, the buckling mechanism further comprises a bottom plate, and the first negative pressure conveying assembly, the second negative pressure conveying assembly, the clamping belt conveying assembly, the turnover belt conveying assembly, the third negative pressure conveying assembly, the fourth negative pressure conveying assembly and the baffle assembly are all assembled on the bottom plate.

[0012] Further, the clamping belt conveying assembly comprises an upper clamping conveying belt arranged around a driving wheel and a tensioning wheel, and a lower clamping conveying belt arranged around a driving wheel and a tensioning wheel, and the upper clamping conveying belt and the lower clamping conveying belt are attached to each other in the first conveying path.

[0013] Further, the turnover belt conveying assembly comprises an upper turnover conveying belt arranged around a driving wheel and a tensioning wheel, and a lower turnover conveying belt arranged around a driving wheel and a tensioning wheel, and the upper turnover conveying belt and the lower turnover conveying belt are attached to each other in the second conveying path.

[0014] Further, the turnover belt conveying assembly further comprises a buckling roller and a base arranged on the bottom plate, the buckling roller is movably installed on the base, and the included angle between the buckling roller and the base is adjustable.

[0015] Further, the buckling roller is provided with at least two buckling rollers along the conveying direction, and the buckling rollers gradually turn the upper and lower turnover conveying belts by 180 degrees along the conveying direction.

[0016] Further, the belt buckling mechanism further comprises a vertical shaft vertically installed on the base, the vertical shaft is rotatably connected with the base, and the end of the vertical shaft is rotatably installed with a horizontal shaft, and the buckling roller is rotatably installed on the horizontal shaft.

[0017] Further, the first negative pressure conveying assembly, the second negative pressure conveying assembly, the third negative pressure conveying assembly and the fourth negative pressure conveying assembly all comprise a mesh belt with mesh and a negative pressure chamber, and the mesh belt is tightly wound on the negative pressure chamber, the driving wheel and the tensioning wheel.

[0018] In summary, the utility model has the following beneficial effects:

[0019] (1) Through reasonable layout of the upstream and downstream sides, the materials are introduced to the second negative pressure conveying assembly, the turnover belt conveying assembly and the fourth negative pressure conveying assembly by the baffle assembly at the feeding end for left and right turnover, and the materials that do not need to be turned over are output through another conveying path, so that the baffle assembly accurately switches the conveying path of the materials at the feeding end, realizes quick shunting between the two negative pressure conveying assemblies to the corresponding clamping belt conveying assembly and turnover belt conveying assembly according to the actual production needs, and outputs at the right end discharge port, so that the left and right heights of the stacked materials are unified during high-speed sheeting.

[0020] (2) The included angle between the buckling roller and the base is adjustable, and the buckling roller can adapt to the turnover of the conveying belt in the conveying stroke by adjusting the angle, and the turnover force and angle are optimized by flexibly adjusting the included angle, so as to ensure the accuracy of the turnover action. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural diagram of the buckling mechanism.

[0022] Figure 2 It is a front view of the buckling mechanism.

[0023] Figure 3 It is a structural diagram of the negative pressure chamber.

[0024] Figure 4 It is a schematic diagram of the baffle assembly.

[0025] Figure 5 It is a structural diagram of the buckling roller.

[0026] Wherein the reference signs are as follows: 1, first negative pressure conveying assembly; 11, mesh belt; 12, negative pressure chamber; 2, second negative pressure conveying assembly; 3, third negative pressure conveying assembly; 4, fourth negative pressure conveying assembly; 5, clamping belt conveying assembly; 51, upper clamping conveying belt; 52, lower clamping conveying belt; 6, turnover belt conveying assembly; 61, upper turnover conveying belt; 62, lower turnover conveying belt; 63, base; 64, buckling roller; 65, vertical shaft; 66, horizontal shaft; 7, baffle assembly; 71, driving motor; 72, rotating shaft; 73, baffle; 8, base plate; 81, driving wheel; 82, tensioning wheel. DETAILED DESCRIPTION

[0027] The utility model will be further explained in detail in combination with examples.

[0028] Example 1

[0029] As shown in Figure 1 and Figure 2 , the embodiment provides a buckling mechanism, the overall mechanism is provided with a first conveying path and a second conveying path, the second conveying path is located on the downstream side of the first conveying path, one side of the first conveying path and the second conveying path forms a feeding end of the buckling mechanism, and the other side forms a discharging end of the buckling mechanism. The material selects the two conveying paths in the whole conveying process from the feeding end and the discharging end, effectively improves the orderliness of conveying, and lays a foundation for fine operation.

[0030] Specifically includes first negative pressure conveying assembly 1, second negative pressure conveying assembly 2, clamping belt conveying assembly 5, turnover belt conveying assembly 6, third negative pressure conveying assembly 3 and fourth negative pressure conveying assembly 4;The feeding end of the first negative pressure conveying assembly 1 and the second negative pressure conveying assembly 2 are arranged oppositely to form the clamping feeding end of the buckling mechanism;The rear conveying section of the second negative pressure conveying assembly 2 is inclined downward and separated from the first negative pressure conveying assembly 1;The separation of the first negative pressure conveying assembly 1 and the second negative pressure conveying assembly 2 is provided with a baffle assembly 7 for pushing the material conveyed by the first negative pressure conveying assembly 1 to the rear conveying end of the second negative pressure conveying assembly 2.

[0031] The output end of the first negative pressure conveying assembly 1 is connected with the feeding end of the clamping belt conveying assembly 5, and the discharging end of the clamping belt conveying assembly 5 is connected with the feeding end of the third negative pressure conveying assembly 3;The material is input from the feeding end of the buckling mechanism, conveyed to the clamping belt conveying assembly 5 through the first negative pressure conveying assembly 1, then conveyed to the third negative pressure conveying assembly 3 through the clamping belt conveying assembly 5, and negatively conveyed by the third negative pressure conveying assembly 3, forming the first conveying path.

[0032] The output end of the second negative pressure conveying assembly 2 is connected with the feeding end of the turnover belt conveying assembly 6, and the discharging end of the turnover belt conveying assembly 6 is connected with the feeding end of the fourth negative pressure conveying assembly 4. The material is input from the feeding end of the buckling mechanism, and is conveyed to the turnover belt conveying assembly 6 by the second negative pressure conveying assembly 2 after being pushed by the baffle assembly 7. The turnover belt conveying assembly 6 conveys the material while turning over the material, and the turned-over material enters the fourth negative pressure conveying assembly 4 and is continuously conveyed by the fourth negative pressure conveying assembly 4, forming a second conveying path.

[0033] In the sanitary napkin piece conveying process, the sanitary napkin material is first conveyed to the feeding end of the buckling mechanism by the feeding conveying mechanism connected with the feeding end of the buckling mechanism, i.e. the feeding end of the first negative pressure conveying assembly 1 and the feeding end of the second negative pressure conveying assembly 2. The first negative pressure conveying assembly 1 and the second negative pressure conveying assembly 2 convey the material by means of the mesh belt 11 with mesh holes and the negative pressure chamber 12. The mesh belt 11 is tightly wound on the negative pressure chamber 12, the driving wheel 81 and the tensioning wheel 82. The negative pressure chamber 12 absorbs the material through the suction holes and the mesh holes of the mesh belt 11, ensuring the stability of the material during conveying.

[0034] When the material enters the feeding end, the baffle assembly 7 starts to work. The baffle driving motor 71 in the baffle assembly 7 drives the rotating shaft 72 to rotate, so that the baffles 73 arranged on the rotating shaft 72 reciprocate. If the material does not need to be turned over, it will directly enter the clamping belt conveying assembly 5 under the conveying of the first negative pressure conveying assembly 1. Generally, the baffle assembly 7 swings once every interval of a sanitary napkin material, and outputs a sanitary napkin without turning over and a sanitary napkin after turning over, and so on, so as to facilitate the interval conveying of the sanitary napkins with and without turning over output by the buckling mechanism.

[0035] The upper clamping conveying belt 51 and the lower clamping conveying belt 52 of the clamping belt conveying assembly 5 are arranged on the driving wheel 81 and the tensioning wheel 82 and are in close contact on the first conveying path, which can stably clamp and convey the material to the third negative pressure conveying assembly 3. The third negative pressure conveying assembly 3 continues to convey the material by negative pressure absorption, forming a first conveying path.

[0036] If the material needs to be turned over, the baffle 73 will push the material on the first negative pressure conveying assembly 1 to the rear conveying section of the second negative pressure conveying assembly 2. The material then enters the turnover belt conveying assembly 6, and the upper turnover conveying belt 61 and the lower turnover conveying belt 62 of the turnover belt conveying assembly 6 are attached to each other on the second conveying path. During the conveying process, the clamping rollers 64 play a key role in turnover. The clamping rollers 64 are provided with at least two along the conveying direction and are movably mounted on the base 63. The included angle between the clamping rollers 64 and the base 63 can be adjusted, and through the linkage structure composed of the vertical shaft 65 and the horizontal shaft 66, the turnover posture can be dynamically adjusted in real time for the upper and lower turnover conveying belts in three-dimensional space, so as to gradually turn over the upper turnover conveying belt 61 and the lower turnover conveying belt 62 by 180° along the conveying direction, thereby realizing the turnover of the material. The turned-over material enters the fourth negative pressure conveying assembly 4 and is continuously conveyed by the fourth negative pressure conveying assembly 4 to form the second conveying path.

[0037] Finally, the output ends of the third negative pressure conveying assembly 3 and the fourth negative pressure conveying assembly 4 are arranged oppositely to form the discharge end of the clamping mechanism, that is, the first conveying path and the second conveying path are merged at the discharge end of the clamping mechanism, thereby completing the whole conveying and processing process of the material and ensuring the uniformity of the left and right heights of the material stack during high-speed sheeting, thereby meeting the production requirements.

[0038] Embodiment 2

[0039] As shown in Figure 1 , Figure 2 , a clamping mechanism includes a first negative pressure conveying assembly 1, a second negative pressure conveying assembly 2, a clamping belt conveying assembly 5, a turnover belt conveying assembly 6, a third negative pressure conveying assembly 3, a fourth negative pressure conveying assembly 4, and a baffle assembly 7. The multiple assemblies form a material conveying assembly line such as sanitary napkins, and each assembly is closely matched to stabilize the whole process from feeding to discharging of the material.

[0040] The first negative pressure conveying assembly 1 and the second negative pressure conveying assembly 2 are arranged at the feeding end of the clamping mechanism to prevent the material from deviating or mispositioning when entering the system during the initial feeding stage.

[0041] The third negative pressure conveying assembly 3 and the fourth negative pressure conveying assembly 4 are arranged at the discharging end. The first negative pressure conveying assembly 1, the second negative pressure conveying assembly 2, the third negative pressure conveying assembly 3, and the fourth negative pressure conveying assembly 4 each include a mesh belt 11 with mesh holes and a negative pressure chamber 12. The mesh belt 11 is tightly wound on the negative pressure chamber 12, a driving wheel 81, and a tensioning wheel 82. In an embodiment, the negative pressure of the negative pressure chamber can be provided by a PVC pipe connected to a stainless steel flange on the chamber to an exhaust fan.

[0042] The output ends of the third negative pressure conveying assembly 3 and the fourth negative pressure conveying assembly 4 are arranged oppositely to form the discharge end of the clamping mechanism, that is, the first conveying path and the second conveying path are merged at the discharge end of the clamping mechanism.

[0043] Each negative pressure chamber 12 has an adsorption hole, and each mesh belt 11 has a mesh hole matched with the adsorption hole, so that the material can be adsorbed and orderly distributed to the first conveying path and the second conveying path at the feeding end and the discharging end, wherein the second conveying path is arranged as a material overturning path.

[0044] As shown in Figure 4 The baffle assembly 7 includes a baffle driving motor 71, a rotating shaft 72, and a baffle 73 arranged on the rotating shaft 72. The rotating shaft 72 is connected with the output shaft of the baffle driving motor 71, and the baffle driving motor 71 drives the baffle 73 to reciprocate, so as to push the material conveyed by the first negative pressure conveying assembly 1 to the rear conveying section of the second negative pressure conveying assembly 2. Through the precise and rapid reciprocation of the baffle 73 driven by the baffle driving motor 71, the material on the first negative pressure conveying assembly 1 can be pushed to the rear conveying end of the second negative pressure conveying assembly 2 instantly according to the production instruction, so as to flexibly realize the diversion switching of the material between different conveying paths.

[0045] The clamping mechanism further includes a bottom plate 8, and the first negative pressure conveying assembly 1, the second negative pressure conveying assembly 2, the clamping belt conveying assembly 5, the overturning belt conveying assembly 6, the third negative pressure conveying assembly 3, the fourth negative pressure conveying assembly 4, and the baffle assembly 7 are all assembled on the bottom plate 8.

[0046] The clamping belt conveying assembly 5 includes an upper clamping conveying belt 51 arranged around a driving wheel 81 and a tensioning wheel 82, and a lower clamping conveying belt 52 arranged around the driving wheel 81 and the tensioning wheel 82. The upper clamping conveying belt 51 and the lower clamping conveying belt 52 are attached to each other on the first conveying path.

[0047] The overturning belt conveying assembly 6 includes an upper overturning conveying belt 61 arranged around a driving wheel 81 and a tensioning wheel 82, and a lower overturning conveying belt 62 arranged around the driving wheel 81 and the tensioning wheel 82. The upper overturning conveying belt 61 and the lower overturning conveying belt 62 are attached to each other on the second conveying path.

[0048] As shown in Figure 5 In the sheet sorting device, the overturning belt conveying assembly 6 further includes a clamping roller 64 and a base 63 arranged on the bottom plate 8. The clamping roller 64 is movably installed on the base 63, and the included angle between the clamping roller 64 and the base 63 is adjustable. In the implementation, at least two clamping rollers 64 are arranged along the conveying direction. The clamping rollers 64 gradually overturn the upper overturning conveying belt 61 and the lower overturning conveying belt 62 by 180° along the conveying direction. The multiple clamping rollers 64 step by step cooperate to gradually overturn the articles.

[0049] Specifically, the belt buckle mechanism further comprises a vertical shaft 65 vertically mounted on the base 63, the vertical shaft 65 is rotatably connected with the base 63, and the end of the vertical shaft 65 is rotatably mounted with a horizontal shaft 66, and the buckle roller 64 is rotatably mounted on the horizontal shaft 66. This linkage structure gives the buckle roller 64 more freedom of movement, so that it can dynamically adjust the turning posture in real time in three-dimensional space for the upper and lower turnover conveyor belt 62.

[0050] In summary, the output end of the first negative pressure conveying assembly 1 is connected with the feeding end of the clamping belt conveying assembly 5, the discharging end of the clamping belt conveying assembly 5 is connected with the feeding end of the third negative pressure conveying assembly 3, forming a first conveying path; the output end of the second negative pressure conveying assembly 2 is connected with the feeding end of the turnover belt conveying assembly 6, and the discharging end of the turnover belt conveying assembly 6 is connected with the feeding end of the fourth negative pressure conveying assembly 4, forming a second conveying path, and the rotation of all belt rollers is driven by the servo motor through the synchronous belt pulley. In the two paths, the material is almost lossless and non-stagnant when it is transferred between the assemblies, maintaining a stable and efficient conveying rhythm and ensuring the continuous and high-speed operation of the production line.

[0051] The above is only a preferred embodiment of the present application, and the present application is not limited to the above, and any modification, equivalent replacement and improvement within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A counter catch mechanism, characterized by: The device comprises a first negative pressure conveying assembly (1), a second negative pressure conveying assembly (2), a clamping belt conveying assembly (5), a turnover belt conveying assembly (6), a third negative pressure conveying assembly (3) and a fourth negative pressure conveying assembly (4). The feeding ends of the first negative pressure conveying assembly (1) and the second negative pressure conveying assembly (2) are oppositely arranged to form a clamping feeding end of a buckling mechanism. The rear conveying section of the second negative pressure conveying assembly (2) is downwardly inclined and separated from the first negative pressure conveying assembly (1). A baffle assembly (7) is arranged at the separation position of the first negative pressure conveying assembly (1) and the second negative pressure conveying assembly (2) to push the material conveyed by the first negative pressure conveying assembly (1) to the rear conveying section of the second negative pressure conveying assembly (2). The output end of the first negative pressure conveying assembly (1) is connected with the feeding end of the clamping belt conveying assembly (5), and the discharging end of the clamping belt conveying assembly (5) is connected with the feeding end of the third negative pressure conveying assembly (3). The material is input from the feeding end of the buckling mechanism, conveyed by the first negative pressure conveying assembly (1) to the clamping belt conveying assembly (5), then conveyed by the clamping belt conveying assembly (5) to the third negative pressure conveying assembly (3), and conveyed by the third negative pressure conveying assembly (3) to form a first conveying path. The output end of the second negative pressure conveying assembly (2) is connected with the feeding end of the turnover belt conveying assembly (6), and the discharging end of the turnover belt conveying assembly (6) is connected with the feeding end of the fourth negative pressure conveying assembly (4). The material is input from the feeding end of the buckling mechanism, pushed by the baffle assembly (7), and then conveyed by the second negative pressure conveying assembly (2) to the turnover belt conveying assembly (6). The turnover belt conveying assembly (6) conveys the material while turning over the material. The turned-over material enters the fourth negative pressure conveying assembly (4) and is continuously conveyed by the fourth negative pressure conveying assembly (4) to form a second conveying path.

2. A shackle according to claim 1, wherein: The output ends of the third negative pressure conveying assembly (3) and the fourth negative pressure conveying assembly (4) are oppositely arranged to form a discharging end of the buckling mechanism, i.e. the first conveying path and the second conveying path are combined at the discharging end of the buckling mechanism.

3. A mating mechanism as claimed in claim 1 or 2, characterized in that: The baffle assembly (7) comprises a baffle driving motor (71), a rotating shaft (72) and baffles (73) arranged on the rotating shaft. The rotating shaft (72) is connected with the output shaft of the baffle driving motor (71). The baffle driving motor (71) drives the baffles (73) to reciprocatingly swing, and pushes the material conveyed by the first negative pressure conveying assembly (1) to the rear conveying section of the second negative pressure conveying assembly (2).

4. A mating mechanism as claimed in claim 1 or 2, characterized in that: The buckling mechanism further comprises a bottom plate (8). The first negative pressure conveying assembly (1), the second negative pressure conveying assembly (2), the clamping belt conveying assembly (5), the turnover belt conveying assembly (6), the third negative pressure conveying assembly (3), the fourth negative pressure conveying assembly (4) and the baffle assembly (7) are all assembled on the bottom plate (8).

5. A mating mechanism as claimed in claim 1 or 2, characterized in that: The clamping belt conveying assembly (5) comprises an upper clamping conveying belt (51) wound on the driving wheel (81) and the tensioning wheel (82), and a lower clamping conveying belt (52) wound on the driving wheel (81) and the tensioning wheel (82), the upper clamping conveying belt (51) and the lower clamping conveying belt (52) being attached to each other on the first conveying path.

6. A shackle as claimed in claim 1 or 2 wherein: The turnover belt conveying assembly (6) comprises an upper turnover conveying belt (61) wound on the driving wheel (81) and the tensioning wheel (82), and a lower turnover conveying belt (62) wound on the driving wheel (81) and the tensioning wheel (82), the upper turnover conveying belt (61) and the lower turnover conveying belt (62) being attached to each other on the second conveying path.

7. A shackle assembly as claimed in claim 6, wherein: The turnover belt conveying assembly (6) further comprises a counter-rolling wheel (64) and a base (63) arranged on the bottom plate (8), the counter-rolling wheel (64) being movably arranged on the base (63) and having an adjustable angle with the base (63).

8. A shackle assembly as claimed in claim 7, wherein: The counter-rolling wheel (64) is provided with at least two along the conveying direction, the counter-rolling wheel (64) gradually turns the upper turnover conveying belt (61) and the lower turnover conveying belt (62) by 180° along the conveying direction.

9. A shackle assembly as claimed in claim 8, wherein: The belt counter-rolling mechanism further comprises a vertical shaft (65) vertically arranged on the base (63), the vertical shaft (65) being rotatably connected with the base (63), the vertical shaft (65) having a horizontal shaft (66) rotatably arranged at the end, and the horizontal shaft (66) rotatably arranging the counter-rolling wheel (64).

10. A shackle as claimed in claim 1 or 2 wherein: The first negative pressure conveying assembly (1), the second negative pressure conveying assembly (2), the third negative pressure conveying assembly (3) and the fourth negative pressure conveying assembly (4) all comprise a mesh belt (11) with mesh and a negative pressure chamber (12), the mesh belt (11) being tightly wound on the negative pressure chamber (12), the driving wheel (81) and the tensioning wheel (82).

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