Packaging box packaging device

Abstract

The invention relates to the technical field of packaging equipment, and particularly discloses a packaging box packaging device which comprises a machine body, a conveying mechanism, a box sealing mechanism and a folding mechanism are arranged on the machine body, the folding mechanism comprises a driving assembly, a first folding assembly and a second folding assembly, the first folding assembly comprises a connecting piece and two pressing plates, and the two ends of the connecting piece are each provided with a movable part; the upper ends of the two pressing plates are hinged, the hinged ends of the pressing plates are elastically connected with the connecting piece, and the pressing plates are elastically connected with the movable part. The driving assembly comprises a driving piece and a movable piece, the driving piece is connected with the movable piece, the movable piece is fixed to the movable part, the connecting piece is movably connected with the movable piece, and the movable part is matched with the connecting piece through a limiting structure; and the second folding assembly comprises two pressing rods, the upper ends of the pressing rods are hinged to the machine body, the pressing rods are slidably connected with movable rods, the movable pieces are connected with the movable rods through connecting rods, and the movable rods are connected with the pressing rods through adjusting structures.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging equipment, and in particular to a packaging box packaging device. Background Art

[0002] Packaging devices are usually used on product packaging lines to seal the boxes after the products are loaded into them to ensure that the products will not be scattered or damaged during transportation. In the related technology, when sealing the boxes, although there are automatic tape-sticking devices, manual assistance is still required in the actual operation, resulting in high workload for workers and affecting the packing efficiency of the boxes.

[0003] The patent document with authorization announcement number CN221795133U discloses a packaging box packaging device, including a support column, the support column includes a conveying unit, a fixing unit and a packaging unit, the conveying unit includes a fixing rod, a bottom plate, a conveying motor, a conveying rod, a limiting side plate, a packaging box, an infrared sensor and a conveyor belt, the fixing unit includes an outer frame, a fixing plate, a mounting plate, a small plate and a wheel plate, and the packaging unit includes a rubber rod, a tape, a limiting cover, a roller, a mounting rod, a pressure wheel, a stepping motor, a fixing block, a limiting disk, a threaded rod, a cutting plate, a cutting tooth and a support plate; a stepping motor is fixed to the bottom of the support plate of the packaging device, and the stepping motor drives the threaded rod to rotate, so that the fixing block will move up and down through the thread, and then the limiting disk will limit the descent of the fixing block so that it will not fall, and then the cutting plate at the bottom of the threaded rod can move up and down to enable the cutting tooth to cut and separate the tape for the packaging of the next packaging box.

[0004] When sealing the sealed portion of a carton, it is necessary to first fold the cardboards at the sealed portion. When folding the cardboards, it is necessary to ensure that the two long cardboards are pressed on the upper sides of the two short cardboards, and when sticking the tape, the cardboards are pressed with appropriate force to keep the cardboards flat, so as to ensure the flatness of the packaging box. The packaging box packaging device provided in the above patent document cannot automatically fold the cardboards at the sealed portion of the carton, which affects the packaging effect and efficiency of the packaging box. Summary of the invention

[0005] The present invention provides a packaging box packing device, aiming to solve the problem that the packaging device in the related art cannot automatically fold the cardboard at the sealing portion of the carton when packaging the packaging box, thereby affecting the packaging effect and efficiency of the packaging box.

[0006] A packaging box packing device of the present invention comprises a machine body, on which a conveying mechanism and a box sealing mechanism are provided, and on which a folding mechanism is also provided, and the folding mechanism comprises a driving component, a folding component 1 and a folding component 2; The folding assembly 1 comprises a connecting member and two pressing plates, wherein a movable portion is adjacently disposed at each end of the connecting member, the upper ends of the two pressing plates are hinged, and the hinged ends thereof are elastically connected to the connecting member, and the two pressing plates are elastically connected to the two movable portions respectively; The driving assembly comprises a driving member and a movable member, wherein the driving member drives the movable member to slide longitudinally, the movable member is fixed to the two movable parts, the connecting member is elastically connected to the movable member, and the connecting member is further connected to a limiting structure, wherein the limiting structure is used to limit the relative sliding state between the connecting member and the movable member; Folding component 2 includes two pressure rods, the symmetry planes of the two pressure rods are perpendicular to the symmetry planes of the two pressure plates, the upper ends of the two pressure rods are hinged to the machine body, the two pressure rods are slidably connected with movable rods, the movable parts are respectively connected to the two movable rods through two connecting rods, the movable rod and the pressure rod are connected through an adjustment structure, and the adjustment structure is used to adjust the relative sliding state of the movable rod and the pressure rod.

[0007] The beneficial effects are as follows: the packing efficiency and packing quality of the packaging box are improved, the folding component 1 and the folding component 2 in the folding mechanism cooperate to fold the cardboard at the sealing portion of the packaging box, the folding component 1 is used to fold the short cardboard inward, and the folding component 2 is used to fold the two long cardboards, and when the short cardboard is folded inward, the two long cardboards are pushed outward to avoid the two short cardboards, so as to avoid interference between the short cardboard and the two long cardboards when folding inward, thereby ensuring that the cardboard at the sealing portion of the packaging box is smoothly overlapped, realizing the automatic folding operation of the cardboard at the sealing portion of the packaging box, and effectively ensuring the flatness of the cardboard folding, facilitating the subsequent action of the sealing mechanism to stick tape on the packaging box, and greatly reducing manual operations during the packaging process, realizing the automatic packaging operation of the packaging box, and greatly improving production efficiency.

[0008] Preferably, the limiting structure includes a limiting rod and a limiting block, the upper end of the limiting rod is fixed relative to the machine body, the limiting rod is longitudinally slidably matched with the movable part, a limiting part is provided on the lower side of the limiting rod, the limiting block is elastically connected and slidably matched with the limiting part, the limiting block is movably abutted against the lower end surface of the connecting part, the limiting block is also connected to a movable block, the movable part is movably abutted against the movable block, and when the movable part moves downward, it pushes the movable block to move downward and drives the limiting block to be retracted into the limiting part to avoid the connecting part.

[0009] Preferably, a sliding groove is provided at the lower end of the limiting rod, the movable block slides longitudinally along the sliding groove, and the movable block is connected to the limiting block via a connecting rope.

[0010] The beneficial effects are: it is convenient to automatically release the limit on the connecting piece according to the folding action of the packaging box. When the driving part drives the two movable parts to move downward through the movable part, when the movable part moves to contact the movable block, it pushes the movable block to slide in the slide groove, and pulls the limit block away from the connecting piece by the pull rope, thereby releasing the limit on the connecting piece and improving the flexibility of the folding mechanism.

[0011] Preferably, the lower end surface of the limit block is in the shape of an inclined surface, and the lower end surface of the limit block is inclined from top to bottom in a direction away from the connecting member.

[0012] The beneficial effects are: the folding mechanism can be smoothly reset after completing the packing operation of a packaging box. When the driving member drives the movable member to move upward, the connecting member is pulled upward by the elastic member, and the connecting member contacts the inclined end of the limit block and squeezes the limit block back into the limit part. When the connecting member moves to the upper side of the limit block, the spring pushes the limit block to extend again and abuts against the lower end surface of the connecting member, thereby limiting the position of the connecting member and realizing repeated packing of multiple packaging boxes.

[0013] Preferably, the adjustment structure includes an adjustment part and a stopper, the adjustment part is fixed relative to the movable rod, the pressure rod is provided with a connecting groove in its length direction, the adjustment part is slidably matched with the connecting groove, the connecting rod is hinged to the adjustment part, the stopper is slidably matched with the pressure rod and is elastically connected, the movable rod is provided with a movable groove, the stopper is slidably matched with the movable groove and movably abuts against the lower end of the adjustment part, and the connecting rod is provided with an extrusion part, the extrusion part is movably abutted against the stopper.

[0014] The beneficial effect is that the adjustment structure limits the relative sliding state of the movable rod and the pressure rod, thereby adjusting the total length of the movable rod and the pressure rod during the folding process of the cardboard at the sealing end of the packaging box, ensuring that the two pressure rods can smoothly contact the two cardboards on the carton when they are relatively far apart, and push the two cardboards away, thereby ensuring the normal operation of the folding mechanism.

[0015] Preferably, a pressing portion is fixed to the bottom end of the movable rod.

[0016] The beneficial effect is: preventing the bottom of the movable rod from pressing the long cardboard and causing scratches to the long cardboard, thereby ensuring the quality of the packaging box.

[0017] Preferably, the lower end surface of the stopper is in the shape of an inclined surface, and the lower end surface of the stopper is inclined from top to bottom in a direction away from the movable part.

[0018] Preferably, the two pressing plates are connected to the two movable parts via an elastic telescopic rod, and the hinged ends of the two pressing plates are connected to the connecting member via an elastic telescopic rod.

[0019] Preferably, the movable member and the connecting member are connected via an elastic telescopic rod.

[0020] The beneficial effects of the present invention are as follows: the packing efficiency and packing quality of the packaging box are improved; the folding component one and the folding component two in the folding mechanism cooperate to fold the cardboard at the sealing portion of the packaging box; the folding component one is used to fold the short cardboard inwardly; the folding component two is used to fold the two long cardboards; and when the short cardboard is folded inwardly, the two long cardboards are pushed outwardly to avoid the two short cardboards, so as to avoid interference between the short cardboard and the two long cardboards when folded inwardly, thereby ensuring that the cardboard at the sealing portion of the packaging box is smoothly overlapped, realizing the automatic folding operation of the cardboard at the sealing portion of the packaging box, and effectively ensuring the flatness of the cardboard folding, facilitating the subsequent action of the sealing mechanism to stick tape on the packaging box, and greatly reducing manual operations during the packaging process, realizing the automatic packaging operation of the packaging box, and greatly improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the initial state of the folding mechanism in the present invention.

[0023] Figure 3 This is a state diagram of the folding component in the present invention when pressing the short paperboard.

[0024] Figure 4 This is a state diagram of the folding assembly in the present invention completing the folding of the cardboard at the sealing portion of the packaging box.

[0025] Figure 5 It is a schematic diagram of the connection structure between the movable part and the folding component 1 in the present invention.

[0026] Figure 6 yes Figure 5 Enlarged view of part A.

[0027] Figure 7 It is a schematic diagram of the connection structure of the pressure rod, the movable rod and the connecting rod in the present invention.

[0028] Reference numerals: 1. Machine body; 11. Conveying mechanism; 12. Carton sealing mechanism; 2. Driving member; 21. Movable member; 22. Connecting member; 23. Movable part; 24. Pressing plate; 25. Connecting rod; 3. Limiting rod; 31. Limiting part; 32. Limiting block; 33. Movable block; 34. Slide; 35. Connecting rope; 4. Pressing rod; 41. Movable rod; 411. Pressing part; 412. Adjusting part; 42. Stop block; 43. Connecting rod; 431. Extruding part; 44. Connecting groove; 5. Packing box. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] like Figures 1 to 4 As shown, the packaging box packing device of the present invention includes a body 1, on which a conveying mechanism 11, a folding mechanism and a sealing mechanism 12 are provided. After the product is placed in the open packaging box 5, it is conveyed to the folding mechanism by the conveying mechanism 11. The folding mechanism folds the cardboard at the sealing end of the packaging box 5 and presses the cardboard at the sealing end of the packaging box 5 to keep it flat. The conveying mechanism 11 continuously conveys the packaging box 5 to a position opposite to the sealing mechanism 12, and then the sealing mechanism 12 seals the sealing end of the packaging box 5. The sealing mechanism 12 specifically seals the packaging box 5 by sticking tape to the sealing end of the packaging box 5, wherein the structure of sealing the packaging box 5 by sticking tape belongs to the prior art, and the specific structure of the sealing mechanism 12 will not be repeated here.

[0031] The folding mechanism includes a driving component, a folding component 1 and a folding component 2. The cardboards at the sealing of the packaging box 5 include two short cardboards and two long cardboards. To ensure the packaging effect of the packaging box 5, it is necessary to first fold the two short cardboards toward the inside of the packaging box 5, and then fold the two long cardboards and press them on the upper side of the two short cardboards, and press the two long cardboards to keep the two long cardboards flat. Finally, the sealing mechanism 12 sticks tape to the two long cardboards to seal the box. The folding component 1 is used to fold the short cardboard inward, and the folding component 2 is used to fold the two long cardboards, and push the two long cardboards outward when the short cardboards are folded inward to avoid the two short cardboards, so as to avoid interference between the short cardboards and the two long cardboards when they are folded inward, thereby ensuring that the cardboards at the sealing of the packaging box 5 are smoothly overlapped.

[0032] The folding assembly 1 includes a connecting member 22 and two pressing plates 24. A movable portion 23 is adjacently disposed at each end of the connecting member 22. The upper ends of the two pressing plates 24 are hinged. The hinged ends of the two pressing plates 24 are elastically connected to the connecting member 22. The hinged ends of the two pressing plates 24 can be connected to the connecting member 22 through an elastic telescopic rod. The two pressing plates 24 are elastically connected to the two movable portions 23 respectively. The two pressing plates 24 can also be connected to the two movable portions 23 through an elastic telescopic rod. One end of the telescopic rod is hinged to the pressing plate 24, and the other end of the telescopic rod is hinged to the pressing plate 24. The driving assembly includes a driving member 2 and a movable member 21. The driving member 2 is a cylinder. The protruding end of the driving member 2 is connected to the movable member 21. The driving member 2 drives the movable member 21 to slide longitudinally. The movable member 21 is fixed to two movable parts 23 respectively through two connecting rods 25. The two movable parts 23 rise and fall synchronously with the movable member 21. The connecting member 22 is elastically connected to the movable member 21, specifically, they can be connected through an elastic telescopic rod. A limiting structure is also provided between the connecting member 22 and the movable part 23. The limiting structure is used to limit the relative sliding state of the connecting member 22 and the movable member 21.

[0033] like Figure 5 and Figure 6 As shown, the limiting structure includes a limiting rod 3 and a limiting block 32. The upper end of the limiting rod 3 is fixed relative to the body 1. The movable member 21 is provided with a through groove longitudinally opposite to the limiting rod 3. The limiting rod 3 longitudinally slides with the movable member 21 through the through groove. A limiting portion 31 is provided on the lower side of the limiting rod 3. The limiting block 32 is elastically connected to the limiting portion 31 and slides with the limiting portion 31 in the horizontal direction. The limiting block 32 can be directly connected to the limiting portion 31 through a spring. When the spring is naturally extended, the limiting block 32 abuts against the lower end surface of the connecting member 22 to limit the sliding of the connecting member 22 relative to the body 1. At this time, the driving member 2 drives the movable member 21 to move downward and pushes the two movable members. 21 moves downward, and the position of the connecting member 22 does not move with the movable member 21. A sliding groove 34 is provided at the lower end of the limiting rod 3, and the sliding groove 34 is communicated with the inside of the limiting part 31. The limiting block 32 is also connected to a movable block 33. The movable part 23 is movably abutted against the movable block 33. The movable block 33 is connected to the limiting block 32 by a connecting rope 35. When the movable part 23 moves downward, the movable block 33 is pushed to move downward in the sliding groove 34. The movable block 33 further pulls the limiting block 32 to move relative to the limiting part 31 through the connecting rope 35 until the limiting block 32 is retracted into the limiting part 31 and avoids the connecting member 22, thereby releasing the limit on the connecting member 22, and the connecting member 22 can move downward with the movable member 21.

[0034] The upper and lower ends of the slide groove 34 are also provided with arc-shaped grooves. The movable block 33 is spherical. When the movable block 33 moves into the groove, it is flush with the slide groove 34 and is completely inside the slide groove 34, so that the movable part 23 can smoothly move over the limit rod 3 and avoid affecting the downward movement of the movable part 23.

[0035] In order to facilitate the folding mechanism to smoothly reset after completing the packing operation of a packaging box 5 and realize repeated packing of multiple packaging boxes 5, the lower end face of the limit block 32 is inclined, and the lower end face of the limit block 32 is inclined from top to bottom in a direction away from the connecting member 22. When the driving member 2 drives the movable member 21 to move upward, the connecting member 22 is pulled upward by the elastic member, and the connecting member 22 contacts the inclined end of the limit block 32 and squeezes the limit block 32 back into the limit portion 31. When the connecting member 22 moves to the upper side of the limit block 32, the spring pushes the limit block 32 to extend again and abut against the lower end face of the connecting member 22 to limit the position of the connecting member 22.

[0036] like Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, the folding assembly 2 includes two pressure rods 4, the symmetry planes of the two pressure rods 4 are perpendicular to the symmetry planes of the two pressure plates 24, the upper ends of the two pressure rods 4 are hinged to the body 1, the two pressure rods 4 are slidably connected with movable rods 41, the movable member 21 is respectively connected to the two movable rods 41 through two connecting rods 43, the movable rod 41 is connected to the pressure rod 4 through an adjustment structure, the adjustment structure is used to adjust the relative sliding state of the movable rod 41 and the pressure rod 4, the adjustment structure includes an adjustment part 412 and a stopper 42, the adjustment part 412 is fixed relative to the movable rod 41, the pressure rod 4 The rod 4 is provided with a connecting groove 44 in the length direction thereof, the adjusting portion 412 is slidably matched with the connecting groove 44, the connecting rod 43 is hinged with the adjusting portion 412, the stopper 42 is slidably matched with the pressure rod 4 and is elastically connected, the movable rod 41 is provided with a movable groove, the stopper 42 is slidably matched with the movable groove and movably abuts against the lower end of the adjusting portion 412, the connecting rod 43 is provided with an extruding portion 431, the extruding portion 431 is movably abutted against the stopper 42, the lower end surface of the stopper 42 is in the shape of an inclined surface, and the lower end surface of the stopper 42 is inclined from top to bottom in a direction away from the movable part 21.

[0037] The specific working process of the folding mechanism provided by the present invention for folding the paperboard at the sealing portion of the carton is as follows: The initial state of the folding mechanism is as follows Figure 2 As shown, the conveying mechanism 11 conveys the packaging box 5 to the lower side of the folding mechanism, and the driving member 2 drives the movable member 21 to move downward, and the two movable parts 23 move downward synchronously with the movable member 21. In the initial stage of the descent of the movable part 23, it does not contact the movable block 33 of the limiting structure. The limiting structure limits the position of the connecting member 22. The connecting member 22 and the two movable parts 23 are connected to the pressing plate 24 through an elastic telescopic rod. The position of the connecting member 22 remains unchanged, and the height of the hinge of the two pressing plates 24 remains unchanged. When the two movable parts 23 move downward, they push the two pressing plates 24 to rotate around their hinge ends, and the angle between the two pressing plates 24 becomes smaller. The two pressing plates 24 gradually contact the two short cardboards at the sealing of the packaging box 5. The specific state is as shown in FIG. Figure 3 As shown; When the movable part 21 moves downward, it drives the connecting rod 43 to move downward and rotate. The connecting rod 43 pushes the pressure rod 4 to rotate relative to the machine body 1. The two pressure rods 4 move away from each other. During the process of the two pressure rods 4 moving away from each other, the two long paper boards are pushed to move away from each other and avoid the folding direction of the two short paper boards. When the connecting rod 43 rotates, it also pushes the stopper 42 to slide through the squeezing part 431 at its end, so that the stopper 42 releases the limit on the adjustment part 412. The movable rod 41 further slides relative to the pressure rod 4 driven by the connecting rod 43, extending the overall length of the pressure rod 4 and the movable rod 41, so as to ensure that the two connecting rods 43 smoothly contact the long paper board of the packaging box 5 during the operation of moving away from each other and rotating, and push the long paper board to deflect outward. After the driving member 2 drives the movable member 21 to move downward until the limiting mechanism releases the limiting effect on the connecting member 22, the connecting member 22 moves downward with the two movable parts 23, and the angle between the two pressing plates 24 increases and moves downward. After the pressing plates 24 gradually move to contact the side edges of the box body, the driving member 2 continues to push the movable member 21 downward to drive the two pressing plates 24 to press the short paper boards downward until the two pressing plates 24 are in a horizontal state and press on the two short boards; In this operation, the movable member 21 drives the connecting rod 43 to move downward, and the end of the connecting rod 43 connected to the movable member 21 gradually moves to the lower side of the end of the connecting rod 43 connected to the adjusting portion 412. In this process, the connecting rod 43 pushes the two pressing rods 4 to separate relatively and then relatively move closer until the two pressing rods 4 resume the vertical state. The lower ends of the two movable rods 41 push the two long cardboards to close together on the upper sides of the two short cardboards and press the two long cardboards. Figure 4 As shown, in order to avoid scratching the long cardboard when the bottom of the movable rod 41 presses it, a pressing portion 411 is also fixed to the bottom of the movable rod 41. The pressing portion 411 can be a round rod shape, and the pressing portion 411 is perpendicular to the movable rod 41. After the two long cardboards are relatively closed, a gap for avoiding the telescopic rod is formed in the middle. The width of the gap between the movable portion 23 and the connecting member 22 and the pressure rod 4 is smaller than the gap after the two long cardboards are closed. The pressure rod 4 and the pressing plate 24 cooperate to fold the cardboard at the sealing portion of the packaging box 5, while ensuring the cardboard folding effect, it can also prevent the cardboard from being dented under the pressure of the pressure rod 4. After the folding mechanism folds the cardboard at the sealing portion of the packaging box 5, the conveying mechanism 11 continues to convey the packaging box 5 to the sealing mechanism 12. During the process of the sealing mechanism 12 applying tape at the sealing portion of the packaging box 5, the folding mechanism gradually separates from the packaging box 5 as the packaging box 5 moves, does not affect the gluing operation of the packaging box 5, and ensures the flatness of the sealing portion of the packaging box 5 during the gluing operation.

[0038] The packaging box packing device provided by the present invention automatically folds the cardboard at the sealing end of the packaging box through a folding mechanism before the packaging box is sealed, thereby realizing a fully automatic sealing operation of the packaging box, while effectively ensuring the flatness of the folded cardboard at the sealing end of the packaging box, thereby improving the packaging quality of the packaging box.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A packaging box packing device, comprising a body (1), the body (1) being provided with a conveying mechanism (11) and a box sealing mechanism (12), characterized in that: The machine body (1) is also provided with a folding mechanism, which comprises a driving component, a folding component 1 and a folding component 2; the folding component 1 comprises a connecting member (22) and two pressing plates (24); a movable portion (23) is adjacently provided at each end of the connecting member (22); the upper ends of the two pressing plates (24) are hinged, and the hinged ends are elastically connected to the connecting member (22); the two pressing plates (24) are elastically connected to the two movable portions (23) respectively; the driving component comprises a driving member (2) and a movable member (21); the driving member (2) drives the movable member (21) to slide longitudinally; the movable member (21) is fixed to the two movable portions (23); the connecting member (22) is connected to the movable member (21); The connecting member (22) is elastically connected, and the connecting member (22) is also connected to a limiting structure, and the limiting structure is used to limit the relative sliding state of the connecting member (22) and the movable member (21); the folding component 2 comprises two pressure rods (4), the symmetry planes of the two pressure rods (4) are perpendicular to the symmetry planes of the two pressure plates (24), the upper ends of the two pressure rods (4) are hinged to the body (1), the two pressure rods (4) are slidably connected to the movable rods (41), the movable member (21) is respectively connected to the two movable rods (41) through two connecting rods (43), the movable rods (41) and the pressure rods (4) are connected through an adjustment structure, and the adjustment structure is used to adjust the relative sliding state of the movable rods (41) and the pressure rods (4).

2. The packaging box packing device according to claim 1, characterized in that: The limiting structure comprises a limiting rod (3) and a limiting block (32); the upper end of the limiting rod (3) is fixed relative to the machine body (1); the limiting rod (3) and the movable member (21) are longitudinally slidably matched; a limiting portion (31) is provided on the lower side of the limiting rod (3); the limiting block (32) and the limiting portion (31) are elastically connected and slidably matched; the limiting block (32) and the lower end surface of the connecting member (22) are movably abutted; the limiting block (32) is also connected to a movable block (33); the movable member (23) and the movable block (33) are movably abutted; when the movable member (23) moves downward, the movable block (33) is pushed downward, and the limiting block (32) is driven to be retracted into the limiting portion (31) to avoid the connecting member (22).

3. The packaging box packing device according to claim 2, characterized in that: A sliding groove (34) is provided at the lower end of the limiting rod (3), and the movable block (33) slides longitudinally along the sliding groove (34). The movable block (33) is connected to the limiting block (32) via a connecting rope (35).

4. The packaging box packing device according to claim 2, characterized in that: The lower end surface of the limit block (32) is in the shape of an inclined surface, and the lower end surface of the limit block (32) is inclined from top to bottom in a direction away from the connecting member (22).

5. The packaging box packing device according to claim 1, characterized in that: The adjustment structure comprises an adjustment portion (412) and a stopper (42); the adjustment portion (412) is fixed relative to the movable rod (41); a connecting groove (44) is provided on the pressure rod (4) in the length direction thereof; the adjustment portion (412) and the connecting groove (44) are slidably matched; the connecting rod (43) and the adjustment portion (412) are hinged; the stopper (42) and the pressure rod (4) are slidably matched and elastically connected; a movable groove is provided on the movable rod (41); the stopper (42) and the movable groove are slidably matched and movably abut against the lower end of the adjustment portion (412); and a pressing portion (431) is provided on the connecting rod (43); the pressing portion (431) and the stopper (42) are movably abutted against.

6. The packaging box packing device according to claim 5, characterized in that: A pressing portion (411) is fixed to the bottom end of the movable rod (41).

7. The packaging box packing device according to claim 5, characterized in that: The lower end surface of the stopper (42) is in the shape of an inclined surface, and the lower end surface of the stopper (42) is inclined from top to bottom in a direction away from the movable member (21).

8. The packaging box packing device according to claim 1, characterized in that: The two pressing plates (24) are connected to the two movable parts (23) via elastic telescopic rods, and the hinged ends of the two pressing plates (24) are connected to the connecting piece (22) via the elastic telescopic rods.

9. The packaging box packing device according to claim 1, characterized in that: The movable member (21) and the connecting member (22) are connected via an elastic telescopic rod.

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