Bending structure of box gluing machine

Abstract

The utility model discloses a bending structure of a box gluing machine, which is characterized in that when a pushing bottom plate is positioned at a primary bending position, the pushing bottom plate is positioned right below a bending and pushing-in module, and a first bending module comprises first bending structures symmetrically arranged at two sides of the primary bending position; the first bending structures on the two sides are in primary bending fit with the bending and pushing-in module correspondingly, meanwhile, the pushing bottom plate is in abutting fit with the bending and pushing-in module, and the target box is exactly clamped between the pushing baffles on the two sides. And when the pushing bottom plate is located at the secondary bending position, the second bending module comprises second bending structures which are symmetrically arranged on the two sides of the secondary bending position, and the second bending structures on the two sides are aligned to the pushing bottom plate correspondingly and are matched with the pushing bottom plate in a secondary bending mode. And the two bending modules are used for carrying out rapid secondary bending in sequence, so that the bending efficiency and quality of the target box are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of box gluing machines, in particular to a bending structure of a box gluing machine. Background Art

[0002] The box gluing machine can completely replace the box preparation equipment for skilled manual gluing, can be arbitrarily adjusted according to the size of the glue box, can save a large amount of labor, improve production efficiency, and significantly improve benefits. Generally, a bending structure is included in the box gluing machine to bend the sheet material that has been cut and scored, eliminating manual bending.

[0003] As described in the published patent CN213261342U, at present, in the packaging and printing industry, the application of the box gluing machine is the last process of packaging box processing. During production, the packaging box is formed by folding and bonding a whole printed cardboard. First, multiple creases are die-cut on the cardboard, and then the cardboard is bent along the creases to form a three-dimensional hollow box body structure; the machine bonding of the box body replaces the traditional manual box pasting method, reducing labor costs and improving efficiency, and has now been widely promoted.

[0004] The existing automatic box gluing machine mainly consists of a main frame, an electric control box, a feeding mechanism, a folding edge mechanism, and a bonding mechanism. Among them, the main frame: has a three-dimensional frame as the support and installation base of the equipment; the electric control box is arranged on the main frame to control the coordinated operation of each mechanism; the feeding mechanism: is installed on one side of the upper surface of the main frame, and has a feeding driving shaft and a feeding driven shaft arranged in parallel along the conveying direction. The feeding driving shaft and the feeding driven shaft are connected by a conveyor belt, and the feeding driving shaft is connected to a feeding driving mechanism for feeding the cardboard to be formed; the folding edge mechanism: is arranged at a position in the middle and rear of the running direction of the conveyor belt of the feeding mechanism on the main frame, and has a carrying strip for carrying the cardboard to run, and a folding edge component arranged above the side of the carrying strip to fold one or both sides of the cardboard upward and a pressing edge component arranged above the carrying strip to press the folded two sides facing each other flat; the bonding mechanism has a glue coating component for coating glue after pressing the two sides facing each other flat and a bonding component for fixing the formed shape.

[0005] However, the existing automatic box gluing machine can only perform box gluing and forming on cardboard with a relatively simple structure, and cannot completely process or has a poor processing effect on cardboard with a relatively complex structure that requires multi-sided folding. And this kind of cardboard with a relatively complex structure often has higher structural strength and better quality. The existing folding edge mechanism cannot effectively perform effective folding processing on the cardboard box. Therefore, the existing technology still needs to be improved and enhanced. Summary of the Utility Model

[0006] The utility model aims to provide a technical solution to solve the above problems in order to overcome the above deficiencies.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A folding structure of a box gluing machine comprises a folding platform, the middle position of the folding platform is hollowed out to form a folding space, a folding push module is arranged just above the folding space, and the folding platform is provided with a first folding module and a second folding module along the length direction of the folding space; a pushing module is arranged just below the folding space, and the pushing module comprises a pushing linear cylinder and a pushing bottom plate, the pushing bottom plate is connected to the pushing linear cylinder, and reciprocates along the length direction of the folding space, the pushing bottom plate has a primary bending position and a secondary bending position, and pushing baffles with adjustable intervals are arranged on the front and rear sides of the pushing bottom plate; when the pushing When the bottom plate is in the primary bending position, the pushing bottom plate is located directly below the bending and pushing module, and the first bending module includes first bending structures symmetrically arranged on both sides of the primary bending position. The first bending structures on both sides respectively perform primary bending cooperation with the bending and pushing module, and at the same time, the pushing bottom plate and the bending and pushing module perform pressing cooperation, and the target box is just stuck between the pushing baffles on both sides; when the pushing bottom plate is in the secondary bending position, the second bending module includes second bending structures symmetrically arranged on both sides of the secondary bending position, and the second bending structures on both sides are respectively aligned with the pushing bottom plate and perform secondary bending cooperation.

[0009] In a further technical solution, the first bending structure includes a first bending slide, a first landing drive cylinder and a single bending baffle group. The first bending slide is slidably installed on the folding platform along the direction of the vertical pushing linear cylinder; the first landing drive cylinder is fixed to the folding platform and is transmission-connected to the first bending slide; the single bending baffle group is set in two groups, and the two groups of single bending baffle groups are respectively installed on both sides of the outer side surface of the first bending slide by bolts, and are symmetrically arranged.

[0010] In a further technical solution, the single-bending baffle group includes a connecting seat, a pre-folding baffle, a single-bending baffle and a folding ear baffle. The pre-folding baffle, the single-bending baffle and the folding ear baffle are respectively fixed to the connecting seat by bolts, and the connecting seat is installed on the first bending slide by bolts, wherein the single-bending baffle and the folding ear baffle are perpendicular to each other and form a bending angle of 90 degrees; the pre-folding baffle is located on the outside of the bending angle, the pre-folding baffle is parallel to the single-bending baffle, and the height of the pre-folding baffle is greater than that of the single-bending baffle.

[0011] In a further technical solution, the tops of the pre-folded baffle, the once-bent baffle and the folded ear baffle are respectively bent to provide abutting chamfered portions, and each abutting chamfered portion is bent outwards.

[0012] In a further technical solution, a sliding angle iron is provided on both sides of the folding space, and the sliding angle iron cooperates with the pushing baffle to push the workpiece.

[0013] In a further technical solution, the second bending structure includes a module bottom plate, a first driving cylinder, a movable middle plate, a second driving cylinder, a movable top frame, a secondary bending driving cylinder, and a secondary bending pressing plate. The module bottom plate is fixedly assembled on the hemming platform; the movable middle plate is slidably assembled on the module bottom plate; the first driving cylinder is fixed on the module bottom plate and is drivingly connected to the movable middle plate; the movable top frame is slidably installed on the movable middle plate; the second driving cylinder is fixed on the movable middle plate and is drivingly connected to the movable top frame; a first hinge seat and a second hinge seat are provided on the side of the movable top frame. One end of the secondary bending driving cylinder is pivotally connected to the first hinge seat, and a connecting plate is hinge-mounted on the second hinge seat; the secondary bending pressing plate is hinge-mounted on the outer end of the connecting plate and is fixedly connected to the piston rod of the secondary bending driving cylinder.

[0014] In a further technical solution, the pushing linear cylinder is provided with a linear movable seat. The surface of the linear movable seat is provided with a first lifting cylinder and a second lifting cylinder. The pushing bottom plate is slidably assembled up and down on the linear movable seat and is connected to the piston rod of the first lifting cylinder; the second lifting cylinder is located in front of the first lifting cylinder, and a pushing plate is assembled on the piston rod of the second lifting cylinder.

[0015] In a further technical solution, two position sensors are provided at intervals on the side of the pushing linear cylinder. The linear movable seat is respectively in trigger cooperation with these two position sensors and corresponds to the first bending position and the second bending position.

[0016] In a further technical solution, the bending pushing module includes a pushing bracket, a pushing driving cylinder, a pushing pressing plate, and a negative pressure suction cup. The pushing bracket is arranged on the hemming platform; the pushing driving cylinder is fixed on the hemming platform and is arranged vertically downward; the pushing pressing plate is slidably assembled on the pushing bracket. The pushing pressing plate and the pushing bracket are slidably connected and cooperated through at least one sliding straight pipe. An assembly cavity is formed on the bottom surface of the pushing pressing plate; the negative pressure suction cup is fixed in the assembly cavity, and its adsorption mating surface protrudes slightly from the bottom surface of the pushing pressing plate.

[0017] In a further technical solution, a negative pressure pipe cavity is arranged inside the sliding straight pipe. A connector one is arranged at the top opening of the negative pressure pipe cavity, and a connector two is arranged at the bottom opening. The connector one is externally connected to an air pump device; a negative pressure connector is arranged at the top of the negative pressure suction cup, and a hose is connected between the negative pressure connector and the connector two.

[0018] After adopting the above structure, the advantages of the present utility model compared with the prior art are as follows: The present utility model provides a bending structure for a box gluing machine. Through the pushing module to push the target box workpiece for secondary bending, and the bending structure driven by two side cylinders, rapid secondary bending can be achieved, with high precision and speed. Through the primary bending baffle group with pre-bending baffles to perform primary bending on the target box workpiece, it can avoid damaging the side of the box. The side of the box is bent at a blocking angle that gradually increases from small to large, reducing the damaged edges caused by bending and improving the yield rate of the equipment. Through the sliding straight pipe that integrates connection assembly and pneumatic connection to slide and assemble the pushing plate, and realize the pneumatic connection of the internal negative pressure suction cup, the design is ingenious and can avoid the risk of the moving pushing plate tearing the hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a schematic cross-sectional diagram of the present utility model;

[0021] Figure 3 is a schematic structural diagram of the pushing module in the present utility model;

[0022] Figure 4 is a schematic structural diagram of the first bending module in the present utility model;

[0023] Figure 5 is a schematic structural diagram of the second bending module in the present utility model;

[0024] Figure 6 is a schematic structural diagram of the target box workpiece in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1-6 , as Figure 6 shown, the target box workpiece 8 of the bending structure of the present utility model includes a box body and a flip cover, and it is necessary to perform primary bending on the four sides and secondary bending on the two sides. For this purpose, the inventor proposes a simple and rapid secondary bending structure.

[0027] As Figures 1 to 5As shown, a bending structure of a box gluing machine includes a folding platform 9, the middle position of the folding platform 9 is hollowed out to form a folding space 90, and a folding push module 1 is provided just above the folding space 90, characterized in that: along the length direction of the folding space 90, the folding platform 9 is provided with a first bending module 3 and a second bending module 4; a push module 2 is provided just below the folding space 90, and the push module 2 includes a push linear cylinder 241 and a push bottom plate 21, the push bottom plate 21 is connected to the push linear cylinder 241, and reciprocates along the length direction of the folding space 90, the push bottom plate 21 has a primary bending position and a secondary bending position, and a spacer is provided on the front and rear sides of the push bottom plate 21 Adjustable pushing baffle 22; when the pushing bottom plate 21 is in the primary bending position, the pushing bottom plate 21 is located directly below the bending and pushing module 1, and the first bending module 3 includes first bending structures symmetrically arranged on both sides of the primary bending position, and the first bending structures on both sides respectively perform primary bending cooperation with the bending and pushing module 1, and at the same time, the pushing bottom plate 21 and the bending and pushing module 1 are pressed and cooperated, and the target box is just stuck between the pushing baffles 22 on both sides; when the pushing bottom plate 21 is in the secondary bending position, the second bending module 4 includes second bending structures symmetrically arranged on both sides of the secondary bending position, and the second bending structures on both sides are respectively aligned with the pushing bottom plate 21 and perform secondary bending cooperation.

[0028] Specifically, the first bending structure includes a first bending slide 31, a first landing drive cylinder and a single bending baffle group. The first bending slide 31 is slidably installed on the folding platform 9 along the direction of the vertical pushing linear cylinder 241; the first landing drive cylinder is fixed to the folding platform 9 and is transmission-connected to the first bending slide 31; the single bending baffle group is set in two groups, and the two groups of single bending baffle groups are respectively installed on both sides of the outer side surface of the first bending slide 31 by bolts, and are symmetrically arranged.

[0029] Specifically, the single-bending baffle group includes a connecting seat 32, a pre-folding baffle 321, a single-bending baffle 322 and a folding ear baffle 323, the pre-folding baffle 321, the single-bending baffle 322 and the folding ear baffle 323 are respectively fixed to the connecting seat 32 by bolts, and the connecting seat 32 is installed on the first bending slide 31 by bolts, wherein the single-bending baffle 322 and the folding ear baffle 323 are perpendicular to each other and form a bending angle of 90 degrees; the pre-folding baffle 321 is located on the outside of the bending angle, the pre-folding baffle 321 is parallel to the single-bending baffle 322, and the height of the pre-folding baffle 321 is greater than that of the single-bending baffle 322.

[0030] Specifically, the tops of the pre-folded baffle 321, the once-bent baffle 322, and the folded ear baffle 323 are respectively bent to form a top-butting chamfered portion, and each top-butting chamfered portion is bent outwards.

[0031] The target box workpiece 8 is pushed for secondary bending by the pushing module, and the bending structure driven by the cylinders on both sides can achieve rapid secondary bending with high precision and high speed; the target box workpiece 8 is bent once by a primary bending baffle group with pre-bending baffles to avoid damage to the side of the box. The side of the box is bent once at a blocking angle from small to large, reducing the bad edges caused by bending and improving the yield rate of the equipment.

[0032] Specifically, a sliding angle iron 91 is respectively provided on both sides of the folding space 90, and the sliding angle iron 91 cooperates with the pushing baffle 22 to push the workpiece.

[0033] Specifically, the second bending structure includes a module base plate 41, a first driving cylinder 421, a movable middle plate 42, a second driving cylinder 431, a movable top frame 43, a secondary bending driving cylinder 443 and a secondary bending pressure plate 45. The module base plate 41 is fixedly assembled on the folding platform 9; the movable middle plate 42 is slidably assembled on the module base plate 41; the first driving cylinder 421 is fixed to the module base plate 41 and is transmission-connected to the movable middle plate 42; the movable top frame 43 is slidably installed on the movable middle plate 42; the second driving cylinder 431 is fixed to the movable middle plate 42 and is transmission-connected to the movable top frame 43; a first hinge seat 441 and a second hinge seat 442 are provided on the side of the movable top frame 43, one end of the secondary bending driving cylinder 443 is pivotally connected to the first hinge seat 441, and the second hinge seat 442 is hingedly installed with a connecting plate 44; the secondary bending pressure plate 45 is hingedly installed on the outer end of the connecting plate 44 and is fixedly connected to the piston rod of the secondary bending driving cylinder 443.

[0034] Specifically, the pushing linear cylinder 241 is provided with a linear movable seat 24, and the surface of the linear movable seat 24 is provided with a first rising cylinder 211 and a second rising cylinder 231. The pushing base plate 21 is slidably assembled on the linear movable seat 24 and is connected to the piston rod of the first rising cylinder 211; the second rising cylinder 231 is located at the front side of the first rising cylinder 211, and the piston rod of the second rising cylinder 231 is equipped with a push-out plate 23.

[0035] Specifically, two position sensors 242 are spaced apart from each other on the side of the linear push cylinder 241 , and the linear movable seat 24 is triggered and cooperated with the two position sensors 242 respectively, and corresponds to the primary bending position and the secondary bending position.

[0036] Specifically, the bending push module 1 includes a pushing bracket 11, a pushing drive cylinder 12, a pushing pressure plate 13 and a negative pressure suction cup 14. The pushing bracket 11 is arranged on the folding platform 9; the pushing drive cylinder 12 is fixed to the folding platform 9 and is arranged vertically downward; the pushing pressure plate 13 is slidably assembled on the pushing bracket 11, and the pushing pressure plate 13 and the pushing bracket 11 are slidably connected and matched by at least one sliding straight tube 15, and the bottom surface of the pushing pressure plate 13 is provided with an assembly cavity 131; the negative pressure suction cup 14 is fixed in the assembly cavity 131, and its adsorption matching surface is slightly protruding from the bottom surface of the pushing pressure plate 13.

[0037] Specifically, a negative pressure lumen 151 is provided inside the sliding straight tube 15, the top opening of the negative pressure lumen 151 is provided with a connector 1 1511, the bottom opening is provided with a connector 2 1512, and the connector 1 1511 is externally connected to an air pump device; a negative pressure connector 141 is provided on the top of the negative pressure suction cup 14, and a hose is connected between the negative pressure connector 141 and the connector 2 1512.

[0038] The push-in pressure plate is slidably assembled through a sliding straight pipe that is integrally connected to the connection assembly and the air pressure connection, and the air pressure connection of the internal negative pressure suction cup is realized. The design is ingenious and can avoid the risk of the movable push-in pressure plate tearing the hose.

[0039] Specifically, one end of the folding space 90 is provided with a push-out rotating module 5, which includes a rotating platform 52, a rotating bracket 51, a lifting bracket 54, a rotating driving motor 53, a lifting driving cylinder 55 and a buffer cylinder 56.

[0040] The rotating bracket 51 is fixed to the bottom of the folding platform 9, and the lifting bracket 54 is slidably connected to the rotating bracket 51; the rotating drive motor 53 is fixed to the lifting bracket 54; the rotating platform 52 is assembled on the output shaft of the rotating drive motor 53; the lifting drive cylinder 55 is fixed to the lifting bracket 54 and is transmission-connected to the lifting bracket 54; the buffer cylinder 56 is assembled at the bottom of the rotating bracket 51 and is movably abutted against the lifting bracket 54.

[0041] The surface of the rotating platform 52 is provided with an ejection positioning structure, including a first baffle 521 and a second baffle 522 on both sides. The first baffle 521 and the second baffle 522 surround and form an ejection station, and the ejection station cooperates with the ejection plate 23 to discharge materials.

[0042] The working principle of the bending structure in this embodiment is as follows: First, the target box workpiece 8 is closely attached to the bottom surface of the pushing pressing plate 13 under the adsorption of the negative pressure suction cup 14; the pushing pressing plate 13 moves downward to drive the target box workpiece 8 to move downward for a primary bending process, and the side surfaces of the target box workpiece 8 are folded under the blocking action of the primary bending stop piece group; the target box workpiece 8 that has completed the primary bending process is transferred to the secondary bending position under the pushing action of the pushing baffle 22, and the second bending module 4 performs a secondary bending process on the flanges on both sides; after the secondary bending is completed, under the pushing action of the pushing plate 23, it is sent to the rotating platform 52 to prepare for the next processing.

[0043] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claimed invention.

Claims

1. A folding structure of a box gluing machine, comprising a folding platform (9), the middle position of the folding platform (9) is hollowed out to form a folding space (90), and a folding push module (1) is provided just above the folding space (90), characterized in that: Along the length direction of the folding space (90), the folding platform (9) is provided with a first bending module (3) and a second bending module (4); a pushing module (2) is provided directly below the folding space (90); the pushing module (2) comprises a pushing linear cylinder (241) and a pushing bottom plate (21); the pushing bottom plate (21) is connected to the pushing linear cylinder (241) and reciprocates along the length direction of the folding space (90); the pushing bottom plate (21) has a primary bending position and a secondary bending position; and pushing baffles (22) with adjustable spacing are provided on the front and rear sides of the pushing bottom plate (21); When the push bottom plate (21) is in the primary bending position, the push bottom plate (21) is located directly below the bending and pushing module (1), and the first bending module (3) comprises first bending structures symmetrically arranged on both sides of the primary bending position, and the first bending structures on both sides respectively perform primary bending cooperation with the bending and pushing module (1), and at the same time, the push bottom plate (21) and the bending and pushing module (1) perform pressing cooperation, and the target box is just stuck between the push baffles (22) on both sides; when the push bottom plate (21) is in the secondary bending position, the second bending module (4) comprises second bending structures symmetrically arranged on both sides of the secondary bending position, and the second bending structures on both sides are respectively aligned with the push bottom plate (21) and perform secondary bending cooperation.

2. The bending structure of a box gluing machine according to claim 1, characterized in that: The first bending structure comprises a first bending slide (31), a first landing drive cylinder and a single bending baffle plate group, wherein the first bending slide (31) is slidably mounted on the folding platform (9) in a direction perpendicular to the pushing linear cylinder (241); the first landing drive cylinder is fixed to the folding platform (9) and is transmission-connected to the first bending slide (31); two sets of single bending baffle plate groups are arranged, and the two sets of single bending baffle plate groups are respectively mounted on both sides of the outer side surface of the first bending slide (31) by bolts and are symmetrically arranged.

3. The bending structure of a box gluing machine according to claim 2, characterized in that: The once-bending baffle plate group comprises a connecting seat (32), a pre-bending baffle plate (321), a once-bending baffle plate (322) and a folding ear baffle plate (323); the pre-bending baffle plate (321), the once-bending baffle plate (322) and the folding ear baffle plate (323) are respectively fixed to the connecting seat (32) by bolts; the connecting seat (32) is mounted on the first bending slide seat (31) by bolts; The first bending baffle (322) and the folding ear baffle (323) are perpendicular to each other and form a bending angle of 90 degrees; the pre-folding baffle (321) is located outside the bending angle, the pre-folding baffle (321) is parallel to the first bending baffle (322), and the height of the pre-folding baffle (321) is greater than that of the first bending baffle (322).

4. The bending structure of a box gluing machine according to claim 3, characterized in that: The tops of the pre-folded baffle (321), the once-bent baffle (322), and the folded ear baffle (323) are respectively bent to provide a top chamfered portion, and each top chamfered portion is respectively bent outwards.

5. The bending structure of a box gluing machine according to claim 4, characterized in that: A sliding angle iron (91) is respectively provided on both sides of the folding space (90), and the sliding angle iron (91) cooperates with the pushing baffle plate (22) to push the workpiece.

6. The bending structure of a box gluing machine according to claim 5, characterized in that: The second bending structure comprises a module bottom plate (41), a first driving cylinder (421), a movable middle plate (42), a second driving cylinder (431), a movable top frame (43), a secondary bending driving cylinder (443) and a secondary bending pressing plate (45). The module bottom plate (41) is fixedly mounted on the folding platform (9); the movable middle plate (42) is slidably mounted on the module bottom plate (41); the first driving cylinder (421) is fixed on the module bottom plate (41) and is transmission-connected to the movable middle plate (42); the movable top frame (43) is slidably mounted on the movable middle plate (42); the second driving cylinder (431) is fixed on the movable middle plate (42) and is transmission-connected to the movable top frame (43); a first hinge seat (441) and a second hinge seat (442) are provided on the side of the movable top frame (43); one end of the secondary bending driving cylinder (443) is pivotally connected to the first hinge seat (441), and a connecting plate (44) is hinge-mounted on the second hinge seat (442); the secondary bending pressing plate (45) is hinge-mounted on the outer end of the connecting plate (44) and is fixedly connected to the piston rod of the secondary bending driving cylinder (443).

7. The bending structure of a box gluing machine according to claim 6, characterized in that: The pushing linear cylinder (241) is provided with a linear movable seat (24), the surface of the linear movable seat (24) is provided with a first rising cylinder (211) and a second rising cylinder (231), the pushing bottom plate (21) is slidably mounted on the linear movable seat (24) up and down, and is connected to the piston rod of the first rising cylinder (211); the second rising cylinder (231) is located at the front side of the first rising cylinder (211), and the piston rod of the second rising cylinder (231) is equipped with a push-out plate (23).

8. The bending structure of a box gluing machine according to claim 7, characterized in that: Two position sensors (242) are arranged at intervals on the side of the linear push cylinder (241), and the linear movable seat (24) is triggered and cooperates with the two position sensors (242) respectively, and corresponds to the primary bending position and the secondary bending position.

9. The bending structure of a box gluing machine according to claim 1, characterized in that: The bending push-in module (1) comprises a push-in bracket (11), a push-in drive cylinder (12), a push-in pressure plate (13) and a negative pressure suction cup (14); the push-in bracket (11) is arranged on the folding platform (9); the push-in drive cylinder (12) is fixed to the folding platform (9) and is arranged vertically downward; the push-in pressure plate (13) is slidably assembled on the push-in bracket (11); the push-in pressure plate (13) and the push-in bracket (11) are slidably connected and matched by at least one sliding straight tube (15); the bottom surface of the push-in pressure plate (13) is provided with an assembly cavity (131); the negative pressure suction cup (14) is fixed in the assembly cavity (131), and its adsorption matching surface is slightly protruding from the bottom surface of the push-in pressure plate (13).

10. The bending structure of a box gluing machine according to claim 9, characterized in that: The sliding straight tube (15) has a negative pressure tube cavity (151) disposed inside, the top opening of the negative pressure tube cavity (151) is provided with a connector 1 (1511), and the bottom opening is provided with a connector 2 (1512), and the connector 1 (1511) is externally connected to an air pump device; the top of the negative pressure suction cup (14) is provided with a negative pressure connector (141), and a hose is connected between the negative pressure connector (141) and the connector 2 (1512).

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