Trapezoidal box stacking device and cartoning machine thereof

Abstract

The present invention discloses a trapezoidal box stacking device and a cartoning machine thereof, comprising: a platform conveying mechanism, a first box feeding mechanism, a second box feeding mechanism, and a third box feeding mechanism, wherein a first intermittent conveying mechanism is provided at the end of the first box feeding mechanism, a second intermittent conveying mechanism is provided at the end of the second box feeding mechanism, the first intermittent conveying mechanism and the second intermittent conveying mechanism are arranged in parallel, a first coding box mechanism is provided on the first intermittent conveying mechanism and the second intermittent conveying mechanism, a second coding box mechanism is provided at the end of the third box feeding mechanism, a stacking platform for receiving the trapezoidal boxes that moves between the first coding box mechanism and the second coding box mechanism is provided on the platform conveying mechanism, and part of the platform conveying mechanism is parallel to the first intermittent conveying mechanism. Compared with the prior art, in the present invention, the box feeding mechanism cooperates with the intermittent conveying mechanism for conveying, and the box feeding mechanism cooperates with the side box pushing mechanism to complete the arrangement of the front trapezoidal boxes, thereby ensuring that the trapezoidal boxes can be conveyed in an orderly manner and ensuring the conveying effect of the trapezoidal boxes.

Description

Technical Field

[0001] The present invention relates to the technical field of box packing, in particular to a trapezoidal box stacking device and a packing machine thereof. Background Art

[0002] In the case packing industry, multiple small boxes are typically packed into a full box for convenient storage and transportation, as seen in the food processing, pharmaceutical manufacturing, industrial parts manufacturing, and daily necessities industries. When packing trapezoidal boxes, they need to be placed in rows, facing up, and then in reverse. Manually placing multiple trapezoidal boxes in a box, facing up, and reversed, is time-consuming and labor-intensive, and inefficient, making the use of a case packer essential. Patent application publication number CN108706132A discloses a stacking device for food packaging boxes. The device comprises a transport mechanism, a pushing mechanism, and food boxes. The guide rails are located at a higher level than the third transport mechanism. The third transport mechanism is provided with a template seat. The first pushing mechanism is provided with a pushing device. The second pushing mechanism is provided with a grabbing device. The device also comprises food boxes, which are arranged in groups with their front and back faces opposite to each other. The food boxes placed on the back face are transported in the transport direction of the first transport mechanism and pushed into the template seat by the pushing device. The food boxes placed on the front face are transported in the transport direction of the second transport mechanism and grabbed by the grabbing device onto the food boxes placed on the back face that have fallen into the template seat. This device replaces manual stacking operations, resulting in high work efficiency. However, multiple food boxes are transported in a single operation on the first transport mechanism, each of which is swung in the back face and then enters along the guide rails. During this process, the multiple food boxes transported in a single operation must be accurately positioned, otherwise confusion will easily occur at the entrance of the guide rails, affecting the transportation and stacking of the food boxes. The more food boxes transported in a single operation, the more likely the positions of the food boxes will deviate. Summary of the Invention

[0003] The present invention provides a trapezoidal box stacking device and a case packing machine thereof, which are used to solve the problem that in the existing box stacking process, confusion easily occurs when multiple boxes enter a guide rail at the same time, thereby affecting the stacking efficiency.

[0004] The present invention provides a trapezoidal box stacking device, comprising: a platform conveying mechanism, a first box feeding mechanism, a second box feeding mechanism and a third box feeding mechanism, wherein a first intermittent conveying mechanism is provided at the end of the first box feeding mechanism, a second intermittent conveying mechanism is provided at the end of the second box feeding mechanism, the first intermittent conveying mechanism and the second intermittent conveying mechanism are arranged in parallel, a first code box mechanism is provided on the first intermittent conveying mechanism and the second intermittent conveying mechanism, a second code box mechanism is provided at the end of the third box feeding mechanism, a stacking platform is provided on the platform conveying mechanism, which moves between the first code box mechanism and the second code box mechanism for receiving trapezoidal boxes, and part of the platform conveying mechanism is parallel to the first intermittent conveying mechanism.

[0005] Preferably, the first stacking box mechanism is a box pushing mechanism provided above the first intermittent conveying mechanism and the second intermittent conveying mechanism, and the box pushing mechanism is used to push the trapezoidal box on the first intermittent conveying mechanism and the trapezoidal box on the second intermittent conveying mechanism together onto the stacking platform.

[0006] Preferably, a side box pushing mechanism is vertically provided at the end of the third box feeding mechanism, and the side box pushing mechanism is used to push the trapezoidal box conveyed by the third box feeding mechanism to one side.

[0007] Preferably, the second box stacking mechanism is a box suction mechanism provided above the side-pushing box mechanism, and the box suction mechanism is used to suck the trapezoidal boxes stacked by the side-pushing box mechanism and place them between the trapezoidal boxes on the stacking platform.

[0008] Preferably, the first intermittent conveying mechanism includes: a chain, a sprocket and a servo motor, the chain and the sprocket are meshed, the servo motor drives the sprocket to rotate, and a plurality of silos are arranged at intervals on the chain. The structure of the second intermittent conveying mechanism is the same as that of the first intermittent conveying mechanism.

[0009] Preferably, the first box feeding mechanism, the second box feeding mechanism and the third box feeding mechanism are arranged in parallel, the first box feeding mechanism and the first intermittent conveying mechanism are arranged vertically, and the second box feeding mechanism and the second intermittent conveying mechanism are arranged vertically.

[0010] Preferably, the movement directions of the first intermittent conveying mechanism and the second intermittent conveying mechanism are opposite.

[0011] Preferably, the first box feeding mechanism, the second box feeding mechanism and the third box feeding mechanism are all belt conveying mechanisms.

[0012] The present invention also provides a trapezoidal box packing machine, comprising: a box conveyor line, a packing mechanism and the stacking device as described above, wherein the packing mechanism is used to transfer the trapezoidal boxes on the stacking platform to the boxes on the box conveyor line, and the box conveyor line is arranged on one side of the platform conveying mechanism.

[0013] Preferably, the packing mechanism is a suction transfer mechanism and is arranged on one side of the second stacking box mechanism, and the box conveying line is parallel to the platform conveying mechanism.

[0014] Compared with the prior art, in the present invention, the box feeding mechanism cooperates with the intermittent conveying mechanism for conveying, thereby ensuring that the trapezoidal boxes can be transported in an orderly manner and the conveying effect of the trapezoidal boxes is ensured. Then, by setting up multiple groups, the conveying efficiency of the trapezoidal boxes on the back is ensured. Secondly, the box feeding mechanism is combined with the side-pushing box mechanism to complete the arrangement of the front trapezoidal boxes. It occupies a small space and can ensure that the trapezoidal boxes can be transported in an orderly manner and the conveying effect of the trapezoidal boxes. The stacking time of the front trapezoidal boxes is consistent with the stacking time of the back trapezoidal boxes, thereby optimizing the efficiency of the trapezoidal box stacking device. Thirdly, the packing mechanism absorbs all the trapezoidal boxes on the stacking platform and then places them into the box body, realizing automatic packing with high efficiency and reducing the labor intensity of manual packing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 A top view of the present invention;

[0018] Figure 3 It is the front view of the present invention;

[0019] Figure 4 It is a left side view of the present invention;

[0020] Figure 5 Schematic diagram of the structure of the first code box mechanism of the present invention;

[0021] Figure 6 for Figure 1 A magnified schematic diagram of the structure at center A;

[0022] Figure 7 for Figure 1 A magnified schematic diagram of the structure at B in the middle;

[0023] Figure 8 This is a schematic diagram of stacking the trapezoidal boxes of the present invention;

[0024] Figure 9 The figure is a schematic diagram of the stacking process of the ladder-shaped boxes on the ladder-shaped box stacking device of the present invention.

[0025] Reference numerals:

[0026] 1. First box-feeding conveying mechanism, 2. Second box-feeding conveying mechanism, 3. Third box-feeding mechanism, 4. First intermittent conveying mechanism, 5. Second intermittent conveying mechanism, 6. First code box mechanism, 7. Side push box mechanism, 8. Second code box mechanism, 9. Platform conveying mechanism, 100. Cartoning mechanism, 200. Box conveyor line, 300. Trapezoidal box, 400. Stacking platform, 500. Box, 61. First bracket, 62. First push plate, 63. First drive member, 64. First lifting assembly, 71. Second push plate, 72. Material pushing assembly, 73 Storage plate, 81. Second bracket, 82. First suction cup, 83. Second drive member, 84. Second lifting assembly, 41. Material silo, 42. Front baffle, 43. Chain. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] Refer to the attached Figure 1 and attached Figure 3 This embodiment provides a device for stacking trapezoidal boxes, including: a platform conveying mechanism 9, a first box feeding mechanism 1, a second box feeding mechanism 2, and a third box feeding mechanism 3. A first intermittent conveying mechanism 4 is provided at the end of the first box feeding mechanism 1, and a second intermittent conveying mechanism 5 is provided at the end of the second box feeding mechanism 2. The boxes on the first box feeding mechanism 1 and the second box feeding mechanism 2 are oriented in the same direction and opposite to the boxes on the third box feeding mechanism 3. The smaller sides of the trapezoidal boxes 300 conveyed by the first box feeding mechanism 1 and the second box feeding mechanism 2 face upward (the rear trapezoidal boxes 300), while the larger sides of the trapezoidal boxes 300 conveyed by the third box feeding mechanism 3 face upward (the front trapezoidal boxes 300). The first intermittent conveying mechanism 4 is arranged parallel to the second intermittent conveying mechanism 5. The first intermittent conveying mechanism 4 and the second intermittent conveying mechanism 5 are provided with a first stacking box mechanism 6. Specifically, the discharge end of the first intermittent conveying mechanism 4 and the discharge end of the second intermittent conveying mechanism 5 are arranged side by side, and there is an overlapping area between the two intermittent conveying mechanisms. The first stacking box mechanism 6 is provided above the overlapping area. A second code box mechanism 8 is provided at the end of the third box feeding mechanism 3, and a stacking platform 400 for receiving the trapezoidal box 300 is provided on the platform conveying mechanism 9. The stacking platform 400 moves between the first code box mechanism 6 and the second code box mechanism 8, and part of the platform conveying mechanism 9 is parallel to the first intermittent conveying mechanism 4.

[0029] The first box feeding mechanism 1 conveys the trapezoidal box 300 to the first intermittent conveying mechanism 4, the second box feeding mechanism 2 conveys the trapezoidal box 300 to the second intermittent conveying mechanism 5, and the first stacking box mechanism 6 transfers the trapezoidal boxes 300 on the first intermittent conveying mechanism 4 and the second intermittent conveying mechanism 5 in the overlapping area to the stacking platform 400, refer to the attached Figure 8-9 At this point, a space for a ladder-shaped box 300 is reserved between adjacent ladder-shaped boxes 300 on the stacking platform 400. The stacking platform 400 is then transported to the second stacking box mechanism 8 via the platform conveyor mechanism 9. The second stacking box mechanism 8 places the ladder-shaped box 300 delivered by the third box feeder mechanism 3 on the stacking platform 400. In this step, the ladder-shaped box 300 is placed in the reserved space on the stacking platform 400 by the second stacking box mechanism 8, thus completing the stacking of the ladder-shaped boxes 300. In the overlapping area, the positions of the first intermittent conveyor mechanism 4 and the second intermittent conveyor mechanism 5 are cleverly utilized to arrange the ladder-shaped boxes 300. Furthermore, the first and second box feeders 1 and 2, in conjunction with the first and second intermittent conveyors 4 and 5, convey the ladder-shaped boxes 300. This results in high conveying efficiency for the ladder-shaped boxes 300, which is beneficial for improving the stacking efficiency of the ladder-shaped boxes 300.

[0030] As another embodiment of the present invention: the first stacking box mechanism 6 is a box pushing mechanism provided above the first intermittent conveying mechanism 4 and the second intermittent conveying mechanism 5, and the box pushing mechanism is used to push the trapezoidal boxes 300 on the first intermittent conveying mechanism 4 and the trapezoidal boxes 300 on the second intermittent conveying mechanism 5 in the overlapping area onto the stacking platform 400. Figure 5 The first stacking cassette mechanism 6 includes a first bracket 61, a first push plate 62, and a first driving member 63. The first driving member 63 drives the first push plate 62 to slide on the first bracket 61. The first push plate 62 is used to push the trapezoidal cassettes 300 on the first and second intermittent conveyor mechanisms 4 and 5 onto the stacking platform 400. The first push plate 62 is connected to a first lifting assembly 64 that drives it up and down. The first lifting assembly 64 drives the first push plate 62 downward. At this time, the trapezoidal cassettes 300 on the first and second intermittent conveyor mechanisms 4 and 5 in the overlapping area are positioned between the first push plate 62 and the platform conveyor mechanism 9. The first push plate 62 slides along the first bracket 61 to push the trapezoidal cassettes 300 in the overlapping area onto the stacking platform 400 on the platform conveyor mechanism 9. The first push plate 62 moves upward during the operation of the intermittent conveyor mechanism and does not affect the operation of the intermittent conveyor mechanism.

[0031] As another embodiment of the present invention: the first lifting component 64 is a first cylinder, and the first driving member 63 is a rodless cylinder. The rodless cylinder makes the entire mechanism compact and convenient for installation.

[0032] As another embodiment of the present invention: a side box pushing mechanism 7 is vertically provided at the end of the third box feeding mechanism 3, and the side box pushing mechanism 7 is used to push the trapezoidal box 300 conveyed by the third box feeding mechanism 3 to one side. Figure 7 The side box pushing mechanism 7 includes a second push plate 71, a storage plate 73, and a push assembly 72. The second push plate 71 is disposed between the storage plate 73 and the push assembly 72. The push assembly 72 drives the second push plate 71 to push the trapezoidal boxes 300 delivered by the third box feeding mechanism 3 to the other end of the storage plate 73. The third box feeding mechanism 3 delivers two trapezoidal boxes 300 to the storage plate 73. Then, the push assembly 72 drives the second push plate 71 to push the two trapezoidal boxes 300 to the other end of the storage plate 73 and arrange them. The third box feeding mechanism 3 then delivers two more trapezoidal boxes 300 to the storage plate 73. At this point, four trapezoidal boxes 300 are arranged on the storage plate 73.

[0033] As another embodiment of the present invention: the second stacking box mechanism 8 is a box suction mechanism provided above the side pushing box mechanism 7, which is used to suck the trapezoidal boxes 300 stacked by the side pushing box mechanism 7 and place them between the trapezoidal boxes 300 on the stacking platform 400. Figure 7 The second stacking cassette mechanism 8 comprises a second bracket 81, a second driver 83, and a first suction cup 82. The second driver 83 drives the first suction cup 82 to slide horizontally along the second bracket 81. The second bracket 81 is positioned above the storage plate 73. The first suction cup 82 is connected to a second lifting assembly 84 that drives it up and down. After the four trapezoidal cassettes 300 are arranged on the storage plate 73, the second lifting assembly 84 drives the first suction cup 82 downward. The first suction cup 82 then picks up the four trapezoidal cassettes 300, slides above the stacking platform 400, and then places the trapezoidal cassette 300 between the trapezoidal cassettes 300 on the stacking platform 400.

[0034] As another embodiment of the present invention, the second lifting assembly 84 and the second driving member 83 are both second cylinders, and the second lifting assembly 84 and the second driving member 83 are vertically arranged. This structure is simple and operates quickly.

[0035] As another embodiment of the present invention: Figure 6The first intermittent conveying mechanism 4 is provided with a plurality of silos 41. The silos 41 are U-shaped structures with their openings facing upwards. The first intermittent conveying mechanism 4 is provided with a front baffle 42 in front of the discharge end of the first box feeding mechanism 1. The front baffle 42 is arranged in the conveying direction of the first box feeding mechanism 1. When the first box feeding mechanism 1 conveys the trapezoidal box 300 to the silo 41, the front baffle 42 prevents the trapezoidal box 300 from moving forward, ensuring that the trapezoidal box 300 stays in the silo 41. The first intermittent conveying mechanism 4 also includes: a chain 43, a sprocket and a servo motor. The chain 43 and the sprocket are meshed, and the servo motor drives the sprocket to rotate. The silos 41 are arranged at intervals on the chain 43. The structure of the second intermittent conveying mechanism 5 is the same as that of the first intermittent conveying mechanism 4. The second silo 41 conveying mechanism is provided with a front baffle 42 in front of the discharge end of the second box feeding mechanism 2. The use of a chain 43 with a chain link facilitates the installation of the silos 41. The spaced silos 41 form an intermittent conveying mode, facilitating the intermittent entry of the trapezoidal boxes 300 into the silos 41. The second intermittent conveying mechanism 5 is the same length as the first intermittent conveying mechanism 4, and can store the same number of trapezoidal boxes 300, making the layout of this structural design more reasonable.

[0036] In another embodiment of the present invention, the first box feeding mechanism 1, the second box feeding mechanism 2, and the third box feeding mechanism 3 are arranged in parallel, the first box feeding mechanism 1 and the first intermittent conveying mechanism 4 are arranged perpendicularly, and the second box feeding mechanism 2 and the second intermittent conveying mechanism 5 are arranged perpendicularly. This arrangement makes the layout of the components of the trapezoidal box stacking device more compact and occupies less space.

[0037] As another embodiment of the present invention: Figure 2 The first intermittent conveyor mechanism 4 and the second intermittent conveyor mechanism 5 move in opposite directions, that is, the feeding direction of the first intermittent conveyor mechanism 4 is opposite to the feeding direction of the second intermittent conveyor mechanism 5, so as to leave sufficient space for the first box feeding mechanism 1 and the second box feeding mechanism 2. This arrangement allows the first box feeding mechanism 1 and the second box feeding mechanism 2 to be arranged on the same side, which helps to reduce the space occupied by the trapezoidal box stacking device in the width direction.

[0038] As another embodiment of the present invention: the first box feeding mechanism 1, the second box feeding mechanism 2 and the third box feeding mechanism 3 are all belt conveying mechanisms.

[0039] As another embodiment of the present invention, a plurality of stacking platforms 400 are provided on the platform conveying mechanism 9. The platform conveying mechanism 9 is also provided with a rotating chain 43. The stacking platforms 400 are fixed on the chain 43 at intervals. The first stacking box mechanism 6 is used to transfer the rear trapezoidal boxes 300 to the top of the stacking platforms 400. The stacking platforms 400 are then transported to the second stacking box mechanism 8. The second stacking box mechanism 8 places the front trapezoidal boxes 300 between the rear trapezoidal boxes 300 on the stacking platforms 400. The trapezoidal boxes 300 are then stacked on the stacking platforms 400. In this structural design, the first stacking box mechanism 6 and the second stacking box mechanism 8 work together to complete the stacking of the trapezoidal boxes 300 on the stacking platforms 400.

[0040] The present invention also provides a trapezoidal box 300 packing machine, Figure 4 , including: a box conveyor line 200, a packing mechanism 100 and the stacking device as mentioned above, the packing mechanism 100 is used to transfer the trapezoidal box 300 on the stacking platform 400 to the box 500 on the box conveyor line 200, and the box conveyor line 200 is arranged on one side of the platform conveying mechanism 9.

[0041] As another embodiment of the present invention: the packing mechanism 100 is a suction transfer mechanism and is arranged on one side of the second stacking box mechanism 8, and the box conveyor line 200 is parallel to the platform conveyor mechanism 9. Specifically, the packing mechanism 100 includes a third bracket and a second suction cup slidably arranged on the third bracket. The third bracket is arranged between the platform conveyor mechanism 9 and the box conveyor line 200. The second suction cup is connected to a third lifting component that drives it to rise and fall. When the ladder-shaped boxes 300 on the stacking platform 400 are stacked, the packing mechanism 100 sucks away all the ladder-shaped boxes 300 on the stacking platform 400 through the second suction cup, then slides to the top of the box 500 and places the ladder-shaped boxes 300 into the box 500.

[0042] In the present invention, during the stacking process of the rear-side trapezoidal boxes 300, two box-feeding mechanisms are used in conjunction with two intermittent conveying mechanisms to quickly arrange the trapezoidal boxes 300. The first stacking mechanism 6 then pushes the arranged trapezoidal boxes 300 onto the stacking platform 400. This structural design allows for rapid stacking of the rear-side trapezoidal boxes 300. The stacking platform 400, upon which the rear-side trapezoidal boxes 300 are stacked, moves to the second stacking mechanism 8 along the platform conveying mechanism 9. During the stacking process of the front-side trapezoidal boxes 300, the side-pushing mechanism 7 first arranges the front-side trapezoidal boxes 300 conveyed from the third box-feeding mechanism 3. The second stacking mechanism 8 then suction-holds the arranged trapezoidal boxes 300 and transfers them to the stacking platform 400 between the rear-side trapezoidal boxes 300. In this structural design, the stacking speed of the rear trapezoidal boxes 300 is fast, while the stacking speed of the front trapezoidal boxes 300 is slow. However, the number of the rear trapezoidal boxes 300 is greater than the number of the front trapezoidal boxes 300. Therefore, the time used to stack the rear trapezoidal boxes 300 and the front trapezoidal boxes 300 is basically the same, and the two are closely connected, which can fully improve the stacking efficiency of the trapezoidal boxes 300. In the present invention, the box feeding mechanism is combined with the intermittent conveying mechanism to transport, ensuring that the trapezoidal boxes 300 can be transported in an orderly manner and the conveying effect of the trapezoidal boxes 300 is ensured. Then, by providing multiple groups, the conveying efficiency of the rear trapezoidal boxes 300 is ensured. Secondly, the box feeding mechanism is combined with the side pushing box mechanism 7 to complete the arrangement of the front trapezoidal boxes 300. It takes up little space and can ensure that the trapezoidal boxes 300 can be transported in an orderly manner and the conveying effect of the trapezoidal boxes 300 is ensured. The stacking time of the front trapezoidal boxes 300 is consistent with the stacking time of the rear trapezoidal boxes 300, thereby optimizing the efficiency of the trapezoidal box stacking device. Third, the packing mechanism 100 absorbs all the trapezoidal boxes 300 on the stacking platform 400 and then places them into the box body 500, thereby realizing automatic packing with high efficiency and reducing the labor intensity of manual packing.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A trapezoidal box stacking device, characterized in that: include: A platform conveying mechanism (9), a first box feeding mechanism (1), a second box feeding mechanism (2) and a third box feeding mechanism (3); a first intermittent conveying mechanism (4) is provided at the end of the first box feeding mechanism (1); a second intermittent conveying mechanism (5) is provided at the end of the second box feeding mechanism (2); the first intermittent conveying mechanism (4) and the second intermittent conveying mechanism (5) are arranged in parallel; a first code box mechanism (6) is provided on the first intermittent conveying mechanism (4) and the second intermittent conveying mechanism (5); a second code box mechanism (8) is provided at the end of the third box feeding mechanism (3); a stacking platform (400) is provided on the platform conveying mechanism (9) for moving between the first code box mechanism (6) and the second code box mechanism (8) for receiving the trapezoidal box (300); and part of the platform conveying mechanism (9) is parallel to the first intermittent conveying mechanism (4).

2. The ladder-shaped box stacking device according to claim 1, characterized in that: The first stacking box mechanism (6) is a box pushing mechanism arranged above the first intermittent conveying mechanism (4) and the second intermittent conveying mechanism (5), and is used to push the trapezoidal box (300) on the first intermittent conveying mechanism (4) and the trapezoidal box (300) on the second intermittent conveying mechanism (5) onto the stacking platform (400).

3. The ladder-shaped box stacking device according to claim 1, characterized in that: A side box pushing mechanism (7) is vertically provided at the end of the third box feeding mechanism (3), and the side box pushing mechanism (7) is used to push the trapezoidal box (300) conveyed by the third box feeding mechanism (3) to one side.

4. The ladder-shaped box stacking device according to claim 3, characterized in that: The second stacking box mechanism (8) is a box suction mechanism arranged above the side pushing box mechanism (7), and the box suction mechanism is used to suck the trapezoidal boxes (300) stacked by the side pushing box mechanism (7) and place them between the trapezoidal boxes (300) on the stacking platform (400).

5. The ladder-shaped box stacking device according to claim 1, characterized in that: The first intermittent conveying mechanism (4) comprises: a chain (43), a sprocket and a servo motor, the chain (43) and the sprocket are meshed, the servo motor drives the sprocket to rotate, and a plurality of silos (41) are arranged at intervals on the chain (43). The structure of the second intermittent conveying mechanism (5) is the same as that of the first intermittent conveying mechanism (4).

6. The ladder-shaped box stacking device according to claim 1, characterized in that: The first box feeding mechanism (1), the second box feeding mechanism (2) and the third box feeding mechanism (3) are arranged in parallel, the first box feeding mechanism (1) and the first intermittent conveying mechanism (4) are arranged vertically, and the second box feeding mechanism (2) and the second intermittent conveying mechanism (5) are arranged vertically.

7. The ladder-shaped box stacking device according to claim 6, characterized in that: The movement directions of the first intermittent conveying mechanism (4) and the second intermittent conveying mechanism (5) are opposite.

8. The ladder-shaped box stacking device according to claim 7, characterized in that: The first box feeding mechanism (1), the second box feeding mechanism (2) and the third box feeding mechanism (3) are all belt conveying mechanisms.

9. A trapezoidal box packing machine, characterized in that: include: A box conveyor line (200), a box packing mechanism (100), and a stacking device according to any one of claims 1 to 8, wherein the box packing mechanism (100) is used to transfer the trapezoidal boxes (300) on the stacking platform (400) to the boxes (500) on the box conveyor line (200), and the box conveyor line (200) is arranged on one side of the platform conveying mechanism (9).

10. The trapezoidal box packing machine according to claim 9, characterized in that: The box packing mechanism (100) is a suction and transfer mechanism and is arranged on one side of the second code box mechanism (8), and the box conveying line (200) is parallel to the platform conveying mechanism (9).

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