A traveling double-sheet cardboard pushing device and a traveling double-sheet cardboard pushing method

Abstract

The present invention belongs to the technical field of fully automatic double-sheet nailing machines, and specifically discloses a traveling double-sheet cardboard pushing and aligning device and a method for traveling and aligning double-sheet cardboards, wherein the device includes a left push claw assembly, a right push claw assembly, a pushing and aligning conveyor belt, and a side push plate assembly; the method includes the steps of: an electric eye monitoring the position of the cardboard in real time; when the rear ends of the two cardboards are separated from the starting end of the pushing and aligning conveyor belt, the left push claw of the left push claw assembly and the right push claw of the right push claw assembly are simultaneously activated to quickly push the cardboards to the rear ends; and a speed difference is set between the left push claw, the right push claw, and the pushing and aligning support belt so that the left push claw and the right push claw push the two cardboards to align. By providing the left push claw assembly, the right push claw assembly, the pushing and aligning conveyor belt, and the side push plate assembly, the present invention can align and splice the two cardboards without stopping while the cardboards are traveling, and has the advantages of simple operation, high precision, and high speed, solving the pain points of the industry.

Description

Technical Field

[0001] The present invention relates to the technical field of fully automatic double-sheet nailing integrated machines, and in particular to a traveling double-sheet cardboard aligning device and a traveling double-sheet cardboard aligning method. Background Art

[0002] The fully automatic double-piece glue and nail machine is an essential equipment for the post-production of carton. It is mainly composed of a double-piece nailing part and a double-piece gluing part. The problem that often occurs in the double-piece glue and nail box forming is the misalignment of the left and right carton pieces, such as Figure 1 As shown, therefore, it is necessary to align and splice the two pieces of cardboard, as shown in Figure 2 As shown in the figure, if the paperboard is not aligned properly, it will greatly affect the accuracy of the carton forming. In addition, the current technology usually requires the paperboard to stop before it can be aligned. This method has a low alignment speed, resulting in a low production rate. Summary of the Invention

[0003] The purpose of the present invention is to solve the technical problems existing in the background technology. To this end, a traveling double-sheet cardboard pushing device and a traveling double-sheet cardboard pushing method are provided.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A method for advancing and aligning two sheets of cardboard comprises the following steps:

[0006] Step S1: Both the left push claw assembly and the right push claw assembly are in a standby state;

[0007] At this time, one of the N left push claws of the left push claw assembly is in a standby position: the left push claw is parallel to the conveyor belt of the push claw assembly, wherein N ≥ 2;

[0008] One of the M right push claws of the right push claw assembly is in a standby position: the right push claw is parallel to the conveyor belt of the push portion, wherein M ≥ 2;

[0009] Step S2: The two paperboards are conveyed to the support belt of the conveyor belt of the pushing part via the conveyor belt of the paper feeding part;

[0010] Step S3: The electric eye monitors the position of the cardboard in real time. When the rear ends of the two cardboards are separated from the starting end of the conveyor belt of the pushing section, the left push claw of the left push claw assembly and the right push claw of the right push claw assembly are simultaneously activated to quickly push the cardboard to the rear end.

[0011] Step S4: Before the front end of any one of the two cardboards enters the downward pressure belt of the push conveyor belt, set the moving speed of the left push claw. , right claw movement speed And the moving speed of the support belt of the push conveyor belt ,in, = > ;

[0012] At the same time, the side push plates on the left and right sides push the two pieces of cardboard inwards and splice them together;

[0013] Step S5: After the two pieces of cardboard are aligned and spliced, the front ends of the two pieces of cardboard simultaneously enter the downward pressure belt of the push conveyor belt, and the moving speed of the left push claw is set. , right claw movement speed And the moving speed of the support belt of the push conveyor belt ,in, = = ;

[0014] Step S6: When the left push claw is separated from the cardboard it abuts against or when the right push claw is separated from the cardboard it abuts against, another left push claw among the N left push claws of the left push claw assembly enters a standby position, and at the same time, another right push claw among the M right push claws of the right push claw assembly enters a standby position;

[0015] Step S7: Wait for the next set of two cardboards and repeat steps S2-S6.

[0016] The following is a technical solution further defined by the method of the present invention. During the entire working process, the left push claw and the right push claw always maintain consistent working operation.

[0017] The following is a technical solution further limited by the method of the present invention. When the left pushing claw and the right pushing claw push the cardboard at the same time, the conveying belt of the paper feeding unit continues to work, thereby continuously conveying two different groups of cardboards.

[0018] The following is a technical solution further defined by the method of the present invention, in which both the left push claw assembly and the right push claw assembly move left and right in a direction parallel to the conveyor belt of the pushing portion, and the belt support surface of the paper feeding portion conveyor belt is flush with the belt support surface of the conveyor belt of the pushing portion.

[0019] A traveling double-sheet cardboard pushing and aligning device is used to implement the above-mentioned traveling and aligning method for double-sheet cardboards, comprising a left pushing claw assembly, a right pushing claw assembly, a pushing and aligning conveyor belt, and a side pushing plate assembly;

[0020] The left push claw assembly includes a left transmission mechanism and N left push claws, wherein N ≥ 2, and the N left push claws are evenly distributed and installed on the transmission belt or transmission chain of the left transmission mechanism;

[0021] The right push claw assembly includes a right transmission mechanism and M right push claws, wherein M ≥ 2, and the M right push claws are evenly distributed and installed on the transmission belt or transmission chain of the right transmission mechanism;

[0022] The paper feeding conveyor belt conveys two pieces of cardboard to the pushing conveyor belt of the aligning part, a left pushing claw abuts against the rear end of one piece of cardboard, and a right pushing claw abuts against the rear end of the other piece of cardboard;

[0023] The side pushing plate of the side pushing plate assembly pushes and splices the two paperboards side by side.

[0024] The following is a technical solution further defined in the device of the present invention: the pushing and aligning part conveying belt includes a pushing and aligning part pressing belt and a pushing and aligning part supporting belt; the spacing between the pushing and aligning part pressing belt and the pushing and aligning part supporting belt is adapted to the thickness of the cardboard; the supporting surface of the pushing and aligning part supporting belt is flush with the supporting surface of the paper feeding part conveying belt.

[0025] The following is a technical solution further defined by the device of the present invention, wherein the length of the downward pressing belt of the pushing portion is smaller than the length of the supporting belt of the pushing portion, and the end of the supporting belt of the pushing portion is aligned with the end of the downward pressing belt of the pushing portion.

[0026] The following is a further technical solution of the device of the present invention: the left push claw assembly includes a driving gear, a driven gear and a transmission belt, the driving gear and the driven gear are respectively engaged with the two ends of the transmission belt, and two or four left push claws are evenly distributed and installed on each transmission belt;

[0027] The driving gear is fixedly mounted on the rotating shaft, the rotating shaft is rotatably mounted on the left mounting plate through a bearing, and the rotating shaft is transmission-connected to the output shaft of the first servo motor;

[0028] The driven gear is rotatably mounted on the fixed shaft via a bearing, and the fixed shaft is fixedly mounted on the left mounting plate;

[0029] The left mounting plate is slidably mounted on the frame, the left pushing claw is configured in an L-shape, and the left pushing claw assembly is located below or above the cardboard.

[0030] The following is a further technical solution of the device of the present invention: the right push claw assembly includes a driving gear, a driven gear and a transmission belt, the driving gear and the driven gear are respectively engaged with the two ends of the transmission belt, and two or four right push claws are evenly distributed and installed on each transmission belt;

[0031] The driving gear is fixedly mounted on the rotating shaft, the rotating shaft is rotatably mounted on the right mounting plate through a bearing, and the rotating shaft is transmission-connected to the output shaft of the second servo motor;

[0032] The driven gear is rotatably mounted on the fixed shaft through a bearing, and the fixed shaft is fixedly mounted on the right mounting plate;

[0033] The right mounting plate is slidably mounted on the frame, the right pushing claw is configured to be L-shaped, and the right pushing claw assembly is located below or above the cardboard.

[0034] Compared with the prior art, the present invention has the following technical effects:

[0035] The present invention is equipped with a left push claw assembly, a right push claw assembly, a push conveyor belt and a side push plate assembly, so that two pieces of cardboard can be aligned and spliced ​​without stopping while the cardboard is moving. It has the advantages of simple operation, high precision and high speed, and solves the pain points of the industry.

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art. Obviously, the drawings described below are only 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.

[0038] Figure 1 It is a schematic diagram of the structure where two pieces of cardboard are not aligned;

[0039] Figure 2 It is a schematic diagram of the structure of two pieces of cardboard aligned;

[0040] Figure 3 It is a structural schematic diagram of the present invention;

[0041] Figure 4 Schematic diagram of the structure of the present invention in standby state, wherein: Figure 4 (a) is a schematic diagram of the front side structure; Figure 4 (b) is a schematic diagram of the top view structure;

[0042] Figure 5 This is a schematic diagram of the structure of the present invention when the left push claw or the right push claw is quickly started to push the cardboard, wherein: Figure 5 (a) is a schematic diagram of the front side structure; Figure 5 (b) is a schematic diagram of the top view structure;

[0043] Figure 6 This is a structural diagram of the present invention when the cardboard enters the pushing part and presses the belt, wherein: Figure 6 (a) is a schematic diagram of the front side structure; Figure 6 (b) is a schematic diagram of the top view structure;

[0044] Figure 7 This is a schematic diagram of the structure of the left push claw or the right push claw being about to separate from the paperboard in the present invention, wherein: Figure 7 (a) is a schematic diagram of the front side structure; Figure 7 (b) is a schematic diagram of the top view structure;

[0045] Figure 8 It is a structural schematic diagram of the present invention applied to a fully automatic double-sheet nail pasting machine.

[0046] Figure numerals: A, left push claw assembly; A1, left push claw; A2, left mounting plate; B, right push claw assembly; B1, right push claw; B2, right mounting plate; C, push conveyor belt; C1, push downward belt; C2, push support belt; D, side push plate assembly; E, cardboard. DETAILED DESCRIPTION

[0047] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0048] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0049] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0050] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0051] like Figure 3-8 As shown, a traveling double-sheet cardboard pushing and aligning device is provided, which is mainly composed of a left push claw assembly A, a right push claw assembly B, a pushing and aligning portion conveyor belt C and a side push plate assembly D, etc., thereby realizing a traveling and aligning method for double-sheet cardboard.

[0052] like Figure 4 As shown, the cardboard E moves from right to left. Depending on the size of the cardboard E, the left push claw assembly A can be set to move left or right, or the right push claw assembly B can be set to move left or right. It is also possible to set both the left push claw assembly A and the right push claw assembly B to move left or right. Both the left push claw assembly A and the right push claw assembly B move left and right in a direction parallel to the push conveyor belt C of the alignment section.

[0053] The left push claw assembly A includes a driving gear, a driven gear, a transmission belt (or a transmission chain) and N left push claws A1, where N ≥ 2, and the N left push claws A1 are evenly distributed and installed on the transmission belt (or transmission chain).

[0054] The driving gear and the driven gear are respectively engaged with the two ends of the transmission belt, and 2 or 4 left push claws A1 are evenly distributed and installed on each transmission belt. Figure 3-7 As shown, the left push claw assembly A has two transmission belts, two driving gears and two driven gears, thus forming a symmetrical structure; two left push claws A1 are evenly distributed and installed on each transmission belt. The left push claw A1 is set to be L-shaped, and the specific length of the left push claw A1 can be specifically designed according to the machine size.

[0055] The driving gear is fixedly mounted on a rotating shaft, which is rotatably mounted on the left mounting plate A2 via a bearing. The rotating shaft is rotatably connected to the output shaft of the first servo motor. The driven gear is rotatably mounted on a fixed shaft via a bearing, which is also fixed to the left mounting plate A2. Therefore, when the first servo motor is operating, it rotates the rotating shaft, which in turn drives the driving gear, which in turn drives the drive belt, causing the left push pawl A1 on the drive belt to circulate.

[0056] The left mounting plate A2 is slidably mounted on a frame (not shown), enabling left and right movement of the left push claw assembly A. The left push claw assembly A is positioned below or above the cardboard E, so the left push claw A1 can be positioned above or below the cardboard E.

[0057] The right push claw assembly B includes a driving gear, a driven gear, a transmission belt (or a transmission chain) and M right push claws B1, where M ≥ 2, and the M right push claws B1 are evenly distributed and installed on the transmission belt (or transmission chain).

[0058] The driving gear and the driven gear are respectively engaged with the two ends of the transmission belt, and 2 or 4 right push claws B1 are evenly distributed and installed on each transmission belt. Figure 3-7 As shown, the right push claw assembly B has two transmission belts, two driving gears and two driven gears, thus forming a symmetrical structure; two right push claws B1 are evenly distributed and installed on each transmission belt. The right push claw B1 is set to be L-shaped, and the specific length of the right push claw B1 can be specifically designed according to the machine size.

[0059] The driving gear is fixedly mounted on a rotating shaft, which is rotatably mounted on the right mounting plate B2 via a bearing. The rotating shaft is connected to the output shaft of the second servo motor. The driven gear is rotatably mounted on a fixed shaft via a bearing, which is also fixed to the right mounting plate B2. Therefore, when the second servo motor is in operation, it rotates the rotating shaft, which in turn drives the driving gear, which in turn drives the transmission belt, causing the right push pawl B1 on the transmission belt to circulate.

[0060] The right mounting plate B2 is slidably mounted on a frame (not shown), enabling left and right movement of the right push claw assembly B. The right push claw assembly B is positioned below or above the cardboard E, so the right push claw B1 can be positioned above or below the cardboard E.

[0061] The paper feed conveyor belt conveys two sheets of cardboard E onto the alignment conveyor belt C. A left push claw A1 abuts the rear end of one sheet of cardboard E, while a right push claw B1 abuts the rear end of the other sheet of cardboard E. The side push plates of a side push plate assembly D (not shown) push and join the two sheets of cardboard E. It should be noted that the side push plate assembly D can be implemented using a linear slide, the slider of which is fixedly connected to the side push plate, thereby pushing the sheets of cardboard E inward.

[0062] The push-pull conveyor belt C includes a push-pull down belt C1 and a push-pull support belt C2. The distance between the push-pull down belt C1 and the push-pull support belt C2 is adapted to the thickness of the paperboard E. The support surface of the push-pull support belt C2 is flush with the support surface of the paper feed conveyor belt. The push-pull down belt C1 is shorter than the push-pull support belt C2, and the end of the push-pull support belt C2 is aligned with the end of the push-pull down belt C1.

[0063] It should be noted that the conveyor belt involved in this embodiment is a simplified design, but it can be designed in a more complicated way according to actual applications, such as Figure 8 shown.

[0064] A method for advancing and aligning two sheets of cardboard comprises the following steps:

[0065] Step S1: Figure 3 and 4 As shown, the left push claw assembly A and the right push claw assembly B are both in standby mode;

[0066] At this time, one of the N left push claws A1 of the left push claw assembly A is in a standby position: the left push claw A1 is parallel to the push conveyor belt C, wherein N ≥ 2;

[0067] One right pushing claw B1 of the M right pushing claws B1 of the right pushing claw assembly B is in a standby position: the right pushing claw B1 is parallel to the pushing conveyor belt C, wherein M≥2.

[0068] Step S2: The two pieces of cardboard E are transported to the supporting belt of the pushing and aligning conveyor belt C via the paper feeding conveyor belt. At this time, the two pieces of cardboard E are in a state of dislocation and separation. Figure 4 shown.

[0069] Step S3: The electric eye monitors the position of the cardboard E in real time, such as Figure 5 As shown, when the rear ends of the two sheets of cardboard E separate from the starting end of the push-to-align conveyor belt C, the left push claw A1 of the left push claw assembly A and the right push claw B1 of the right push claw assembly B simultaneously activate and quickly push the sheets E to the rear ends. While the left and right push claws A1 and B1 are simultaneously pushing the sheets E, the paper feed conveyor belt continues to operate, thereby continuously conveying the two sheets of cardboard E from different groups.

[0070] Step S4: Figure 6 As shown, before the front end of any one of the two cardboards E enters the downward pressure belt of the push conveyor belt C, the moving speed of the left push claw A1 is set to , the moving speed of the right push claw B1 And the moving speed of the support belt of the push conveyor belt C ,in, = > The left push claw A1 and the right push claw B1 push the two pieces of cardboard E to align, and by adjusting the speed of the push claw and the speed difference of the pushing conveyor belt C (specifically, the pushing support belt C2), the two pieces of cardboard E are pushed from Figures 1 to 2 Alignment changes.

[0071] At the same time, the side push plates on the left and right sides push the two pieces of cardboard E inward to splice them together.

[0072] Step S5: Complete the alignment and splicing of the two pieces of cardboard E, as shown in Figure 6 As shown, the front ends of the two cardboards E enter the downward pressure belt of the push conveyor belt C at the same time, and the moving speed of the left push claw A1 is set. , the moving speed of the right push claw B1 And the moving speed of the support belt of the push conveyor belt C ,in, = = .

[0073] Step S6: Figure 7 As shown, when the left pushing claw A1 is separated from the cardboard E it abuts against or when the right pushing claw B1 is separated from the cardboard E it abuts against, another left pushing claw A1 among the N left pushing claws A1 of the left pushing claw assembly A enters the standby position, and at the same time, another right pushing claw B1 among the M right pushing claws B1 of the right pushing claw assembly B enters the standby position;

[0074] Step S7: Wait for the next set of two cardboards E and repeat steps S2-S6.

[0075] During the entire working process, the left push claw A1 and the right push claw B1 always maintain consistent working operation.

[0076] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any person skilled in the art can utilize the methods and technical contents disclosed above to make many possible variations and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments with equivalent variations. Therefore, any equivalent variations made in accordance with the shape, structure, and principles of the present invention without departing from the content of the technical solutions of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for aligning two sheets of cardboard, characterized in that: The method is implemented by a traveling double-sheet cardboard pushing and aligning device, which includes a left pushing claw assembly, a right pushing claw assembly, a pushing and aligning portion conveying belt, and a side pushing plate assembly; The left push claw assembly includes a left transmission mechanism and N left push claws, wherein N ≥ 2, and the N left push claws are evenly distributed and installed on the transmission belt or transmission chain of the left transmission mechanism; The right push claw assembly includes a right transmission mechanism and M right push claws, wherein M ≥ 2, and the M right push claws are evenly distributed and installed on the transmission belt or transmission chain of the right transmission mechanism; The paper feeding conveyor belt conveys two pieces of cardboard to the pushing conveyor belt of the aligning part, a left pushing claw abuts against the rear end of one piece of cardboard, and a right pushing claw abuts against the rear end of the other piece of cardboard; The side pushing plate of the side pushing plate assembly pushes and splices the two paperboards side by side; The pushing and aligning part conveying belt includes a pushing and aligning part pressing belt and a pushing and aligning part supporting belt. The distance between the pushing and aligning part pressing belt and the pushing and aligning part supporting belt is adapted to the thickness of the paperboard. The supporting surface of the pushing and aligning part supporting belt is flush with the supporting surface of the paper feeding part conveying belt. The method comprises the following steps: Step S1: Both the left push claw assembly and the right push claw assembly are in a standby state; At this time, one of the N left push claws of the left push claw assembly is in a standby position: the left push claw is parallel to the conveyor belt of the push claw assembly, wherein N ≥ 2; One of the M right push claws of the right push claw assembly is in a standby position: the right push claw is parallel to the conveyor belt of the push portion, wherein M ≥ 2; Step S2: The two paperboards are conveyed to the support belt of the conveyor belt of the pushing part via the conveyor belt of the paper feeding part; Step S3: The electric eye monitors the position of the cardboard in real time. When the rear ends of the two cardboards are separated from the starting end of the conveyor belt of the pushing section, the left push claw of the left push claw assembly and the right push claw of the right push claw assembly are simultaneously activated to quickly push the cardboard to the rear end. Step S4: before the front end of any one of the two cardboard sheets enters the downward pressure belt of the push-to-align conveyor belt, set the moving speed V1 of the left push claw, the moving speed V2 of the right push claw, and the moving speed V3 of the support belt of the push-to-align conveyor belt, wherein V1 = V2 > V3; At the same time, the side push plates on the left and right sides push the two pieces of cardboard inwards and splice them together; Step S5: After the two pieces of cardboard are aligned and spliced, the front ends of the two pieces of cardboard simultaneously enter the downward pressure belt of the pushing conveyor belt. The moving speed V1 of the left pushing claw, the moving speed V2 of the right pushing claw, and the moving speed V3 of the supporting belt of the pushing conveyor belt are set, where V1 = V2 = V3. Step S6: When the left push claw is separated from the cardboard it abuts against or when the right push claw is separated from the cardboard it abuts against, another left push claw among the N left push claws of the left push claw assembly enters a standby position, and at the same time, another right push claw among the M right push claws of the right push claw assembly enters a standby position; Step S7: Wait for the next set of two cardboards and repeat steps S2-S6.

2. A method for advancing and aligning two sheets of paperboard according to claim 1, characterized in that: During the entire working process, the left push claw and the right push claw always maintain consistent working operation.

3. A method for advancing and aligning two sheets of paperboard according to claim 1, characterized in that: When the left pushing claw and the right pushing claw push the cardboard at the same time, the conveying belt of the paper feeding unit continues to work, thereby continuously conveying two pieces of cardboard from different groups.

4. A method for advancing and aligning two sheets of paperboard according to claim 1, characterized in that: The left pushing claw assembly and the right pushing claw assembly both move left and right in a direction parallel to the conveying belt of the pushing and aligning portion, and the belt supporting surface of the conveying belt of the paper feeding portion is flush with the belt supporting surface of the conveying belt of the pushing and aligning portion.

5. The method for advancing and aligning two sheets of paperboard according to claim 1, characterized in that: The length of the pushing portion pressing belt is smaller than the length of the pushing portion supporting belt, and the end of the pushing portion supporting belt is aligned with the end of the pushing portion pressing belt.

6. A method for advancing and aligning two sheets of paperboard as claimed in claim 1, characterized in that: The left push claw assembly includes a driving gear, a driven gear and a transmission belt. The driving gear and the driven gear are respectively engaged with the two ends of the transmission belt. Two or four left push claws are evenly distributed and installed on each transmission belt. The driving gear is fixedly mounted on the rotating shaft, the rotating shaft is rotatably mounted on the left mounting plate through a bearing, and the rotating shaft is transmission-connected to the output shaft of the first servo motor; The driven gear is rotatably mounted on the fixed shaft via a bearing, and the fixed shaft is fixedly mounted on the left mounting plate; The left mounting plate is slidably mounted on the frame, the left pushing claw is configured in an L-shape, and the left pushing claw assembly is located below or above the cardboard.

7. A method for advancing and aligning two sheets of paperboard according to claim 1, characterized in that: The right push claw assembly includes a driving gear, a driven gear and a transmission belt. The driving gear and the driven gear are respectively engaged with the two ends of the transmission belt. Two or four right push claws are evenly distributed and installed on each transmission belt. The driving gear is fixedly mounted on the rotating shaft, the rotating shaft is rotatably mounted on the right mounting plate through a bearing, and the rotating shaft is transmission-connected to the output shaft of the second servo motor; The driven gear is rotatably mounted on the fixed shaft through a bearing, and the fixed shaft is fixedly mounted on the right mounting plate; The right mounting plate is slidably mounted on the frame, the right pushing claw is configured to be L-shaped, and the right pushing claw assembly is located below or above the cardboard.

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