Middle-position transmission mechanism of automatic box folding machine

Abstract

The utility model relates to the technical field of box folding machines, in particular to a middle-position transmission mechanism of an automatic box folding machine, which comprises a first transmission component and a second transmission component, and the first transmission component and the second transmission component are continuously arranged and are used for driving a paper box blank to advance along an edge folding mechanism and hover to finish edge folding; the first transmission assembly and the second transmission assembly are each provided with a synchronizing mechanism used for being matched with a paper box blank. When the scheme is adopted, the first transmission assembly and the second transmission assembly are arranged in parallel and have an overlapping section, and when a carton blank reaches the overlapping section, the carton blank can be transited from the first transmission assembly to the second transmission assembly. The paper box blank conveying device conveys paper box blanks and accurately conveys the paper box blanks to the corresponding machining positions for machining, the paper box blank folding and forming efficiency can be improved, the better folding and forming effect can be conveniently achieved, paper box forming automation is achieved, and the defects of manual operation are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of box folding machines, in particular to a mid-position transmission mechanism of an automatic box folding machine. Background Art

[0002] Many products are now packaged in boxes and crates before being marketed as finished products. This is especially true for items with easily damaged surfaces, which require the protection of boxes. Current packaging boxes are often formed by folding cardboard to create a space for items. With the growing number of goods, the demand for packaging boxes has also increased dramatically. Traditional packaging box production methods rely primarily on manual labor, either through pure folding or semi-automated production with the assistance of equipment. This approach results in low efficiency, poor product consistency, and high labor costs, making it unable to meet today's growing demand.

[0003] It can be seen that the current folding box processing and production plan still has room for improvement. It should be optimized to increase the degree of automation, so that the efficiency of the entire production process can be improved, the precision of the finished product can be improved, and the overall cost can be reduced. Therefore, a more reasonable technical solution should be proposed to solve the technical problems existing in the existing technology. Utility Model Content

[0004] In order to overcome at least one of the defects mentioned above, the utility model proposes an automatic box folding machine, which realizes automatic transportation through a mid-position transmission mechanism, and cooperates with subsequent processing equipment to feed the paper box blank into it and then fold it in multiple directions. It is not only highly efficient, but also has good accuracy and consistency, avoiding many defects caused by manual operation.

[0005] In order to achieve the above-mentioned purpose, the automatic box folding machine disclosed in the present utility model can adopt the following technical solutions:

[0006] A mid-position transmission mechanism for an automatic box folding machine is disclosed, which drives a carton blank forward, hovers for folding, and conveys it backward after forming. The transmission mechanism can be configured in a variety of forms, and is not limited to a single one. An optimization is provided herein, and one feasible option is proposed: the transmission mechanism includes a first transmission assembly and a second transmission assembly, which are arranged in series and used to drive the carton blank along the folding mechanism and hover to complete the folding. The first and second transmission assemblies are both provided with a synchronization mechanism for cooperating with the carton blank. When this solution is adopted, the first and second transmission assemblies are arranged in parallel and have an overlapping section. When the carton blank reaches the overlapping section, it can transition from the first transmission assembly to the second transmission assembly.

[0007] Furthermore, the first and second transmission assemblies can adopt various structures, which are not limited to a single one. Here, we optimize and propose one feasible option: the first and second transmission assemblies each include a synchronous belt, which is driven by a drive motor and reciprocates; the synchronous belt is connected to a synchronization mechanism and drives the synchronization mechanism to reciprocate synchronously. In this solution, the drive motor is a servo motor, and the synchronization mechanism is used to connect to the carton blank and maintain synchronous movement.

[0008] Furthermore, the synchronization mechanism is used to carry the carton blank to move synchronously, which can be achieved through a variety of solutions and is not limited to a single solution. Here, an optimization is made and one of the feasible options is adopted: the synchronization mechanism includes a synchronization base, on which a plurality of suction cups are provided. The suction cups are connected to the suction cup air path and used to adsorb the carton blank. When the carton blank reaches the transmission mechanism, the suction cups adhere to the carton blank and discharge air through the suction cup air path to form negative pressure adsorption, thereby driving the carton blank to move synchronously, and air is introduced through the suction cup air path to release the negative pressure adsorption. When such a solution is adopted, the suction cup is set upward, and when the carton blank is located above the suction cup, the two adhere to each other. After the suction cup air path discharges the internal air, the carton blank can be firmly adsorbed, thereby driving the carton blank to move synchronously.

[0009] Furthermore, the structure of the synchronization base was optimized, and a feasible option was proposed: an air cavity is formed within the synchronization base and connected to a suction cup mounting port on its surface. The suction cup is connected to the suction cup mounting port and communicates with the air cavity. The air cavity also connects to the air inlet and outlet of the synchronization base, and the air inlet and outlet are respectively provided with an air inlet control component and an air outlet control component. In this solution, the air inlet and outlet control components of the synchronization base include throttle valves.

[0010] Furthermore, when the transmission mechanism drives the carton blank to advance and transition, a smooth transition is maintained and jamming or interference is avoided. This can be achieved by adjusting the structure of the transmission mechanism, which is not limited to the only one. Here, an optimization is made and one feasible option is proposed: the transmission mechanism also includes a transition support assembly, the transition support assembly includes a column and a transition top plate on the column, the transition top plate extends from the first transmission assembly to the second transmission assembly, and the transition top plate includes an upwardly inclined support surface. When such a solution is adopted, the transition support assembly is arranged on the base mechanism and is lifted up when the carton blank advances to the support assembly along with the transmission mechanism.

[0011] Furthermore, to transport the carton blanks backward, the transmission mechanism is optimized, and a feasible option is proposed: the transmission mechanism also includes a third transmission assembly, which is connected to the second transmission assembly and is used to transport the carton blanks backward. The third transmission assembly is provided with a lever assembly to move the carton blanks forward. When this solution is adopted, the lever assembly moves synchronously with the carton blanks.

[0012] Furthermore, the lever assembly can be configured in a variety of structures, which are not limited to a single one. Here, an optimization is proposed as one feasible option: the lever assembly includes a lever arm disposed on the third transmission assembly and circulates with the third transmission assembly. When the carton blank moves along the second transmission assembly and reaches the third transmission assembly, it is moved by the lever arm. In this solution, the lever arm is hinged to the third transmission assembly and can deflect within a certain angle in the longitudinal direction.

[0013] Furthermore, the specific installation structure of the transmission mechanism is not limited to a single one. Here, an optimization is proposed and one feasible option is proposed: the transmission mechanism also includes a transmission frame, which includes a transmission base and a plurality of support frame groups on the transmission base. The first support frame group provided on the transmission base is used to cooperate with and fix the first transmission component, the second support frame group provided is used to cooperate with and fix the second transmission component, and the third support frame group provided is used to cooperate with and fix the third transmission component. When adopting this solution, the first support frame group, the second support frame group, and the third support frame group are all detachable structures.

[0014] Furthermore, the third transmission assembly can employ a variety of transmission structures, and is not limited to a single one. Here, we optimize and propose one feasible option: the third transmission assembly includes a transmission chain plate fixed to the third support frame assembly, the transmission chain plate being provided with a chain that circulates and moves forward, and the transmission chain plate is further connected to a third drive motor to drive the chain forward. In this solution, the shift lever assembly is mounted on the chain and moves synchronously with the chain.

[0015] Compared with the prior art, some of the beneficial effects of the technical solution disclosed in this utility model include:

[0016] The utility model conveys and processes the paper box blanks, and accurately conveys the paper box blanks to the corresponding processing positions for processing, which can improve the efficiency of folding and forming the paper box blanks, and also facilitates achieving better folding and forming effects, realizes the automation of paper box forming, and avoids the defects of manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only represent some embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the box folding machine and an enlarged schematic diagram of its local structure.

[0019] Figure 2 It is a schematic diagram of the structure of the box folding machine from a top view and an enlarged schematic diagram of its local structure.

[0020] Figure 3 It is a structural diagram of the box folding machine from a side view and an enlarged schematic diagram of its local structure.

[0021] Figure 4 Schematic diagram of the overall structure of the base mechanism.

[0022] Figure 5 It is a structural diagram of the supporting frame of the base mechanism.

[0023] Figure 6 Schematic diagram of the transmission mechanism and enlarged diagram of its local structure.

[0024] Figure 7 It is the overall schematic diagram of the synchronization mechanism.

[0025] Figure 8 It is a structural diagram of the mid-position edge holding mechanism and an enlarged schematic diagram of the local structure.

[0026] Figure 9 It is a structural diagram of the fixed side operating mechanism and an enlarged schematic diagram of the local structure.

[0027] Figure 10 It is a structural diagram of the pressure plate action component.

[0028] Figure 11 This is a structural diagram of the folding action component.

[0029] Figure 12 It is a structural diagram of the flanging action component.

[0030] Figure 13 It is a structural diagram of the swing arm action component.

[0031] In the above drawings, the meanings of the various marks are as follows:

[0032] 1. Feeding table; 101. Top panel; 102. Connecting panel; 103. Lifting assembly; 104. Carrier; 105. Drive motor; 106. Synchronous rod; 2. Fixed-side operating mechanism; 201. Long-side folding plate; 202. Guide mechanism; 3. Center-position edge-holding mechanism; 301. Feeding guide plate; 302. Center-position guide plate; 303. Guide column; 304. Guide beam; 305. Holding assembly; 4. Moving-side operating mechanism; 5. Folding action Components; 501, support frame; 502, mounting plate; 503, second folding seat; 504, connecting vertical plate; 505, height adjustment block; 506, third folding seat; 507, shift fork connecting block; 508, folding shift fork; 509, first folding driver; 510, second folding driver; 6, flanging action component; 601, flanging base; 602, flanging arm; 603, shaft hole; 604, flanging shaft; 605, flanging connecting seat; 606, flanging spring ; 607, flanging pressure plate; 608, shaft seat structure; 609, drive shaft; 610, clamping plate; 611, flanging driver; 7, pressure plate action assembly; 701, side pressure plate; 702, connecting plate; 703, telescopic drive structure; 704, adjustment block; 705, pressure plate base; 8, swing arm action assembly; 801, first swing arm shaft seat; 802, second swing arm shaft seat; 803, swing arm base; 804, lower limit adjustment block; 805, lower swing arm; 806 , deflection push-pull seat; 807, installation connecting plate; 808, inner stop telescopic part; 809, lower pressure block; 810, swing arm driver; 9, transmission mechanism; 901, first transmission assembly; 902, second transmission assembly; 903, transition support assembly; 904, third transmission assembly; 905, transmission base; 906, support frame group; 907, shift rod assembly; 10, synchronization mechanism; 1001, synchronization base; 1002, suction cup component; 11, bottom plate cylinder assembly. DETAILED DESCRIPTION

[0033] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0034] In view of the many defects in manual operation in the prior art, the following embodiments are optimized to overcome the defects in the prior art.

[0035] Example 1

[0036] like Figure 6As shown, this embodiment provides a mid-position transmission mechanism for an automatic box folding machine, which drives the carton blank to move forward, hover for folding, and transport it backward after forming, wherein the transmission mechanism 9 can be set to a variety of forms, which is not limited to the only one. This embodiment is optimized and adopts one of the feasible options: the transmission mechanism 9 includes a first transmission component 901 and a second transmission component 902, the first transmission component 901 and the second transmission component 902 are arranged in succession and are used to drive the carton blank to move along the folding mechanism and hover to complete the folding; the first transmission component 901 and the second transmission component 902 are both provided with a synchronization mechanism 10 for cooperating with the carton blank. When such a scheme is adopted, the first transmission component 901 and the second transmission component 902 are arranged in parallel and have an overlapping section. When the carton blank reaches the overlapping section, it can transition from the first transmission component 901 to the second transmission component 902.

[0037] The structures of the first transmission assembly 901 and the second transmission assembly 902 can adopt a variety of schemes, which are not limited to a single scheme. This embodiment optimizes and adopts one feasible option: the first transmission assembly 901 and the second transmission assembly 902 both include a synchronous belt, which is driven by the drive motor 105 and reciprocates; the synchronous belt is connected to the synchronization mechanism 10 and drives the synchronization mechanism 10 to reciprocate synchronously. When adopting this scheme, the drive motor 105 is a servo motor, and the synchronization mechanism 10 is used to connect the carton blank and maintain synchronous movement.

[0038] The synchronization mechanism 10 is used to carry the carton blank to move synchronously, which can be achieved through a variety of solutions and is not limited to the only one. This embodiment is optimized and adopts one of the feasible options: the synchronization mechanism 10 includes a synchronization base 1001, and the synchronization base 1001 is provided with a plurality of suction cups 1002. The suction cups 1002 are connected to the suction cup air path and are used to adsorb the carton blank. When the carton blank reaches the transmission mechanism 9, the suction cups 1002 adhere to the carton blank and discharge air through the suction cup air path to form negative pressure adsorption, thereby driving the carton blank to move synchronously, and air is introduced through the suction cup air path to release the negative pressure adsorption. When such a solution is adopted, the suction cups 1002 are set upward. When the carton blank is located above the suction cups 1002, the two are in contact. After the suction cup air path discharges the internal air, the carton blank can be firmly adsorbed, thereby driving the carton blank to move synchronously.

[0039] The structure of synchronization base 1001 was optimized and a feasible option was adopted: an air cavity was formed within synchronization base 1001 and connected to a suction cup mounting port on its surface. The suction cup was connected to the suction cup mounting port and connected to the air cavity. The air cavity also connected to the air inlet and outlet of the synchronization base, and the air inlet and outlet were respectively equipped with an air inlet control component and an air outlet control component. In this solution, the air inlet and outlet control components of synchronization base 1001 include throttle valves.

[0040] When the transmission mechanism 9 drives the carton blank to advance and transition, it maintains a smooth transition and avoids jamming or interference. Therefore, this can be achieved by adjusting the structure of the transmission mechanism 9. It is not limited to the only one. This embodiment is optimized and adopts one of the feasible options: the transmission mechanism 9 also includes a transition support assembly 903, which includes a column and a transition top plate on the column. The transition top plate extends from the first transmission assembly 901 to the second transmission assembly 902, and the transition top plate includes an upwardly inclined support surface. When such a solution is adopted, the transition support assembly 903 is arranged on the base mechanism and is lifted up when the carton blank advances to the support assembly along with the transmission mechanism 9.

[0041] In order to transport the carton blank backward, this embodiment optimizes the transmission mechanism 9 and adopts one feasible option: the transmission mechanism 9 also includes a third transmission assembly 904, which is connected to the second transmission assembly 902 and is used to transport the carton blank backward. The third transmission assembly 904 is provided with a lever assembly 907 for moving the carton blank forward. When this solution is adopted, the lever assembly 907 moves synchronously with the carton blank.

[0042] The lever assembly 907 can be configured in a variety of structures, which are not limited to a single structure. This embodiment optimizes and adopts one feasible option: the lever assembly 907 includes a lever arm disposed on the third transmission assembly 904 and circulates along with the third transmission assembly 904. When the carton blank moves along the second transmission assembly 902 and reaches the third transmission assembly 904, it is moved by the lever arm. When this solution is adopted, the lever arm is hinged to the third transmission assembly 904 and can deflect within a certain angle in the longitudinal direction.

[0043] The specific installation structure of the transmission mechanism 9 is not limited to a single one. This embodiment optimizes and adopts one feasible option: the transmission mechanism 9 also includes a transmission frame, which includes a transmission base 905 and a plurality of support frame groups 906 disposed on the transmission base 905. The first support frame group disposed on the transmission base 905 is used to cooperate with and fix the first transmission assembly 901, the second support frame group is used to cooperate with and fix the second transmission assembly 902, and the third support frame group is used to cooperate with and fix the third transmission assembly 904. When such a solution is adopted, the first support frame group, the second support frame group, and the third support frame group are all detachable structures.

[0044] The third transmission assembly 904 can adopt a variety of transmission structures, which are not limited to a single one. This embodiment optimizes and adopts one feasible option: the third transmission assembly 904 includes a transmission chain plate fixed to the third support frame assembly, the transmission chain plate is provided with a chain that circulates and moves forward, and the transmission chain plate is also connected to the third drive motor 105 to drive the chain. When adopting this solution, the shifting rod assembly 907 is installed on the chain and moves synchronously with the chain.

[0045] Example 2

[0046] like Figure 1 、 Figure 2 、 Figure 3 As shown, this embodiment provides an automatic box folding machine, comprising:

[0047] Base mechanism, such as Figure 4 、 Figure 5 As shown, it is used to support the load and stabilize the entire box folding machine structure;

[0048] The feeding mechanism is arranged on the base mechanism and is used to adjust the carton blank and feed it into the folding mechanism;

[0049] Transmission mechanism 9, such as Figure 6 、 Figure 7 As shown, it cooperates with the feeding mechanism and is used to drive the carton blank to move forward along the set direction, and when the carton blank moves to the folding mechanism, the transmission mechanism 9 keeps the carton blank suspended through the synchronization mechanism 10. When the folding is completed, the synchronization mechanism 10 releases the carton blank from suspension and continues to move;

[0050] Folding mechanism, such as Figures 9 to 13 As shown, it includes a fixed side operating mechanism 2 and a movable side operating mechanism 4 arranged on the base mechanism. The fixed side operating mechanism 2 and the movable side operating mechanism 4 are arranged opposite to each other and are used to cooperate in folding the front and back ends, left and right sides and the top cover of the paper box blank to form a complete box body.

[0051] The automatic box folding machine disclosed in this embodiment supports the load through a base mechanism. The carton blank is transported from the feed mechanism to the transmission mechanism 9 and then folded through the folding mechanism. The long sides of the carton blank are folded at the folding position of the folding mechanism to form two vertical side panels and a lid, and the lid is kept open and transported backward. When transported to the first folding position, the front end of the carton blank is folded inward and turned upward to complete the sealing of the front end of the box body. When transported to the second folding position, the rear end of the carton blank is folded inward and turned upward to complete the sealing of the rear section of the box body. Continuing to transport the carton blank backward will result in an opened box body that can be used directly as packaging.

[0052] The base mechanism can take various forms and is not limited to a single one. This embodiment optimizes and adopts one feasible option: the base mechanism includes a carrier frame 104, on which are mounted a plurality of drive motors 105. The drive motors 105 operate synchronously via synchronization rods 106. Synchronization rods 106 coordinate with the feed mechanism and transmission mechanism 9 to provide driving force. When this solution is adopted, the base mechanism can be formed by splicing steel columns and steel beams.

[0053] To ensure that the carton blank is more stable during the folding process and can be bonded simultaneously, the specific solution is not limited to a single one. This embodiment optimizes and adopts one feasible option: it also includes a glue dispensing mechanism for applying glue to the carton blank to assist in the bonding and forming of the carton blank after folding. When this solution is adopted, the glue dispensing mechanism includes a glue dispensing head and applies glue to the corresponding veneer surface of the folded edge or the box body.

[0054] The feeding mechanism can be used for temporary storage of carton blanks and provides a platform surface for guiding the carton blanks to cooperate with the transmission mechanism 9. The specific structure is not limited to a single one. This embodiment is optimized and adopts one of the feasible options: the feeding mechanism includes a feeding table 1 for placing the carton blanks, and the front side of the feeding table 1 is aligned with the transmission mechanism 9 so that the carton blanks can move in coordination with the transmission mechanism 9; the front side of the feeding table 1 is also provided with a lifting component 103, which is used to lift the folding edge of the carton blank so that it can cooperate with the folding mechanism. When such a solution is adopted, the lifting component 103 can use a pneumatic telescopic cylinder or a hydraulic telescopic cylinder as a power component to lift the front end of the carton blank so that it can be smoothly put on the transmission mechanism 9.

[0055] The structure of the re-feeding platform 1 can adopt various forms and is not limited to a single form. This embodiment optimizes and adopts one of the feasible options: the feed platform 1 includes a feed frame, the top of the feed frame is connected to the top panel 101 and the connecting panel 102, and the side of the feed frame is connected to the side panels; the lifting assembly 103 is arranged on the feed frame and located outside the connecting panel 102. When the carton blank reaches the edge of the connecting panel 102, it is lifted upward by the lifting assembly 103. When such a solution is adopted, the top panel 101 and the connecting panel 102 are made of metal plates, and the lifting assembly 103 is located at the edge of the connecting panel 102. When the carton blank reaches the edge of the connecting panel 102, it is lifted and smoothly moved onto the transmission mechanism 9, and then folded and formed by the folding mechanism.

[0056] The transmission mechanism 9 drives the carton blank to move forward, hover, fold, and transport it backward after forming. The transmission mechanism 9 can be set in various forms, which are not limited to the only one. This embodiment is optimized and adopts one of the feasible options: the transmission mechanism 9 includes a first transmission component 901 and a second transmission component 902, the first transmission component 901 and the second transmission component 902 are successively arranged and used to drive the carton blank to move along the folding mechanism and hover to complete the folding; the first transmission component 901 and the second transmission component 902 are both provided with a synchronization mechanism 10 for cooperating with the carton blank. When such a solution is adopted, the first transmission component 901 and the second transmission component 902 are arranged in parallel and have an overlapping section. When the carton blank reaches the overlapping section, it can transition from the first transmission component 901 to the second transmission component 902.

[0057] The structures of the first transmission assembly 901 and the second transmission assembly 902 can adopt a variety of schemes, which are not limited to a single scheme. This embodiment optimizes and adopts one feasible option: the first transmission assembly 901 and the second transmission assembly 902 both include a synchronous belt, which is driven by the drive motor 105 and reciprocates; the synchronous belt is connected to the synchronization mechanism 10 and drives the synchronization mechanism 10 to reciprocate synchronously. When adopting this scheme, the drive motor 105 is a servo motor, and the synchronization mechanism 10 is used to connect the carton blank and maintain synchronous movement.

[0058] The synchronization mechanism 10 is used to carry the carton blank to move synchronously, which can be achieved through a variety of solutions and is not limited to the only one. This embodiment is optimized and adopts one of the feasible options: the synchronization mechanism 10 includes a synchronization base 1001, and the synchronization base 1001 is provided with a plurality of suction cups 1002. The suction cups 1002 are connected to the suction cup air path and are used to adsorb the carton blank. When the carton blank reaches the transmission mechanism 9, the suction cups 1002 adhere to the carton blank and discharge air through the suction cup air path to form negative pressure adsorption, thereby driving the carton blank to move synchronously, and air is introduced through the suction cup air path to release the negative pressure adsorption. When such a solution is adopted, the suction cups 1002 are set upward. When the carton blank is located above the suction cups 1002, the two are in contact. After the suction cup air path discharges the internal air, the carton blank can be firmly adsorbed, thereby driving the carton blank to move synchronously.

[0059] The structure of synchronization base 1001 was optimized and a feasible option was adopted: an air cavity was formed within synchronization base 1001 and connected to a suction cup mounting port on its surface. The suction cup was connected to the suction cup mounting port and connected to the air cavity. The air cavity also connected to the air inlet and outlet of the synchronization base, and the air inlet and outlet were respectively equipped with an air inlet control component and an air outlet control component. In this solution, the air inlet and outlet control components of synchronization base 1001 include throttle valves.

[0060] When the transmission mechanism 9 drives the carton blank to advance and transition, it maintains a smooth transition and avoids jamming or interference. Therefore, this can be achieved by adjusting the structure of the transmission mechanism 9. It is not limited to the only one. This embodiment is optimized and adopts one of the feasible options: the transmission mechanism 9 also includes a transition support assembly 903, which includes a column and a transition top plate on the column. The transition top plate extends from the first transmission assembly 901 to the second transmission assembly 902, and the transition top plate includes an upwardly inclined support surface. When such a solution is adopted, the transition support assembly 903 is arranged on the base mechanism and is lifted up when the carton blank advances to the support assembly along with the transmission mechanism 9.

[0061] In order to transport the carton blank backward, this embodiment optimizes the transmission mechanism 9 and adopts one feasible option: the transmission mechanism 9 also includes a third transmission assembly 904, which is connected to the second transmission assembly 902 and is used to transport the carton blank backward. The third transmission assembly 904 is provided with a lever assembly 907 for moving the carton blank forward. When this solution is adopted, the lever assembly 907 moves synchronously with the carton blank.

[0062] The lever assembly 907 can be configured in a variety of structures, which are not limited to a single structure. This embodiment optimizes and adopts one feasible option: the lever assembly 907 includes a lever arm disposed on the third transmission assembly 904 and circulates along with the third transmission assembly 904. When the carton blank moves along the second transmission assembly 902 and reaches the third transmission assembly 904, it is moved by the lever arm. When this solution is adopted, the lever arm is hinged to the third transmission assembly 904 and can deflect within a certain angle in the longitudinal direction.

[0063] The specific installation structure of the transmission mechanism 9 is not limited to a single one. This embodiment optimizes and adopts one feasible option: the transmission mechanism 9 also includes a transmission frame, which includes a transmission base 905 and a plurality of support frame groups 906 disposed on the transmission base 905. The first support frame group disposed on the transmission base 905 is used to cooperate with and fix the first transmission assembly 901, the second support frame group is used to cooperate with and fix the second transmission assembly 902, and the third support frame group is used to cooperate with and fix the third transmission assembly 904. When such a solution is adopted, the first support frame group, the second support frame group, and the third support frame group are all detachable structures.

[0064] The third transmission assembly 904 can adopt a variety of transmission structures, which are not limited to a single one. This embodiment optimizes and adopts one feasible option: the third transmission assembly 904 includes a transmission chain plate fixed to the third support frame assembly, the transmission chain plate is provided with a chain that circulates and moves forward, and the transmission chain plate is also connected to the third drive motor 105 to drive the chain. When adopting this solution, the shifting rod assembly 907 is installed on the chain and moves synchronously with the chain.

[0065] In the process of the carton blank being driven forward, in order to maintain the stability of the carton blank, the carton blank is limited and pressed. Specifically, a variety of methods can be adopted, which are not limited to the only one. This embodiment is optimized and adopts one of the feasible options: Figure 8 As shown, the present invention also includes a median edge pressing mechanism 3 for pressing the carton blank from below to keep it in contact with the transmission mechanism 9. The median edge pressing mechanism 3 includes a median guide plate 302 arranged along the direction of travel of the carton blank. The median guide plate 302 is arranged horizontally and the lower surface of the median guide plate 302 forms a horizontal median guide surface. The two sides of the median guide plate 302 form upwardly curved side guide surfaces. When such a solution is adopted, a travel gap is formed between the median guide plate 302 and the conveying surface of the transmission mechanism 9. The carton blank enters the travel gap to maintain smooth conveying.

[0066] During the travel of the carton blank, it is also guided into the travel gap. The specific structure is not limited to a single one. This embodiment optimizes and adopts one feasible option: the front end of the median guide plate 302 is connected to the feed guide plate 301. The width of the feed guide plate 301 is greater than the width of the median guide plate 302. The lower surface of the feed guide plate 301 is a horizontal guide surface, and the two sides of the feed guide plate 301 form upwardly curved side guide surfaces. When adopting this solution, the feed guide plate 301 and the median guide plate 302 can be integrally formed or fixed by fasteners.

[0067] The middle guide plate 302 is provided with a guide frame, and the guide frame is provided with a retaining assembly 305 .

[0068] The retaining assembly 305 can adopt a variety of structures. This embodiment optimizes and adopts one feasible option: the retaining assembly 305 moves outward toward both sides of the guide frame to form a tight contact structure. When this solution is adopted, the retaining assembly 305 can help the guide frame maintain an intermediate position between the fixed-side operating mechanism 2 and the movable-side operating mechanism 4.

[0069] The structure of the retaining assembly 305 can be constructed in various forms and is not limited to a single one. This embodiment optimizes and adopts one feasible option: the retaining assembly 305 includes a horizontally arranged X-shaped telescopic frame, and the X-shaped telescopic frame is provided with abutment blocks. When the X-shaped telescopic frame is shortened, the abutment blocks move outward toward the sides of the guide frame. When this solution is adopted, the X-shaped telescopic frame can maintain stability by abutting on both sides.

[0070] To facilitate sliding and retracting, this embodiment has been optimized and employs a feasible option: the guide frame is provided with a slide rail, which is equipped with a plurality of sliders. The X-shaped telescopic frame is connected to at least two sliders, and when the two sliders approach each other, the X-shaped telescopic frame is shortened. When this solution is adopted, the slide rail and the sliders can be provided with a notch structure to prevent loosening.

[0071] The guide frame structure can be constructed in various forms and is not limited to a single form. This embodiment optimizes and adopts one feasible option: the guide frame includes a plurality of guide columns 303 vertically connected to the middle guide plate 302, the upper ends of the guide columns 303 are connected to the guide beams 304, and the retaining assembly 305 is cooperatively arranged on the guide beams 304. When such a solution is adopted, the guide beams 304 extend along the direction of travel of the carton blank.

[0072] The fixed-side operating mechanism 2 and the movable-side operating mechanism 4 can be constructed in a variety of schemes, which are not limited to a single scheme. This embodiment optimizes and adopts one of the feasible options: the fixed-side operating mechanism 2 includes a fixed-side operating frame, which is fixedly connected to the base mechanism; the movable-side operating mechanism 4 includes a movable-side operating frame, which is slidably connected to the base mechanism and is relatively close to or away from the fixed-side operating mechanism 2. When such a scheme is adopted, the distance between the fixed-side operating mechanism 2 and the movable-side operating mechanism 4 can be adjusted, thereby facilitating the folding operation of carton blanks of different sizes.

[0073] The specific composition structure of the fixed side operating mechanism 2 can be constructed in a variety of forms, which are not limited to the only one. The present embodiment is optimized and adopts one of the feasible options: the fixed side operating frame and the movable side operating frame are respectively provided with a pressure plate action component 7 for pressing against the carton blank, a folding action component 5 for controlling the transverse folding of the flap at the front and rear ends of the carton blank, a flanging action component 6 for controlling the longitudinal folding of the flap at the front and rear ends of the carton blank, and a swing arm action component 8 for serving as an inner stop for folding. When such a solution is adopted, the two sides of the carton blank are pressed and fitted by the pressure plate action component 7, the flanging action component 5 turns the flanging edges on both sides of the carton blank inward, and the flanging action component 6 turns the flanging edges at the ports of the carton blank upward. In the above process, the swing arm action component 8 serves as an inner stop for folding, so as to facilitate maintaining the consistency of folding.

[0074] The pressure plate actuating assembly 7 can be constructed into a variety of structures, which are not limited to the only ones. This embodiment optimizes and adopts one of the feasible options: the pressure plate actuating assembly 7 includes a pressure plate base 705 and a side pressure plate 701, and the side pressure plate 701 moves closer to or farther away from the pressure plate base 705 in the lateral direction. When the side pressure plate 701 moves away from the pressure plate base 705, it is attached to and pressed against the two side surfaces of the carton blank. When the side pressure plate 701 moves closer to the pressure plate base 705, it releases the carton blank. When such a solution is adopted, the side pressure plate 701 is formed with a side pressure surface that is attached to the side surface of the carton blank.

[0075] To automate the pressure plate movement, the composition of the pressure plate movement assembly 7 is optimized and improved. This embodiment adopts one feasible option: a pressure plate driver is provided between the side pressure plate 701 and the pressure plate base 705. The pressure plate driver includes a telescopic drive structure 703, and the telescopic drive structure 703 drives the side pressure plate 701 toward or away from the pressure plate base 705. When adopting this solution, the pressure plate driver can be an electric drive component, a hydraulic drive component, or a pneumatic drive component.

[0076] Preferably, the pressure plate driver described in this embodiment includes a telescopic cylinder.

[0077] The pressure plate driver can be provided in a variety of ways, and is not limited to a single solution. This embodiment optimizes and adopts one feasible option: a connecting plate 702 is provided on the side pressure plate 701, and the telescopic drive structure 703 of the pressure plate driver is fixedly coupled to the connecting plate 702. When this solution is adopted, the connecting plate 702 and the side pressure plate 701 can be integrally formed or connected and fixed by fasteners.

[0078] The structure of the pressure plate base 705 can also be optimized. This embodiment employs one feasible option: an adjustment block 704 is provided on the pressure plate base 705. The adjustment block 704 is positioned in correspondence with the pressure plate driver and is used to limit the position of the pressure plate driver. In this embodiment, the adjustment block 704 is connected to the pressure plate base 705 via fasteners and can rotate relative to the pressure plate base 705, thereby adjusting its relative position with the pressure plate base 705 and thus adjusting the position of the pressure plate base 705.

[0079] The pressure plate base 705 can be constructed in a variety of configurations and is not limited to a single configuration. This embodiment optimizes and adopts one feasible option: the pressure plate base 705 includes a base plate having a plurality of connection holes formed therein; upright plates are formed on two adjacent side surfaces of the base plate, and the upright plates on the two side surfaces are integrally formed with the base plate. When this configuration is adopted, the integral formation of the upright plates and the base plate improves overall strength and reliability.

[0080] The structure of the upright plate can be constructed in various forms and is not limited to a single one. This embodiment optimizes and adopts one feasible option: the upright plate is formed with a mounting portion extending forward. When such a solution is adopted, the mounting portion is connected to the fixed pressure plate driver.

[0081] The structure of the hemming action component 5 is not limited to a single one. This embodiment is optimized and adopts one of the feasible options: the hemming action component 5 includes a first hemming seat and a second hemming seat 503, the second hemming seat 503 is slidably arranged on the first hemming seat, and a first hemming driver 509 is provided between the first hemming seat and the second hemming seat 503 to control relative movement; a third hemming seat 506 is provided on the second hemming seat 503, and a hemming fork 508 is provided on the third hemming seat 506, and the hemming fork 508 is controlled to deflect by the second hemming driver 510. When such a solution is adopted, the first hemming driver 509 controls the second hemming seat 503 to move forward and backward, and the second hemming driver 510 controls the hemming fork 508 on the third hemming seat 506 to deflect horizontally, thereby realizing the lateral folding of the hemming edge at the end of the carton blank.

[0082] The structure of the first hem folding seat is not limited to a single one. This embodiment optimizes and adopts one feasible option: the first hem folding seat includes a support frame 501 and a mounting plate 502. The mounting plate 502 is fixed to the support frame 501. The second hem folding seat 503 cooperates with the mounting plate 502, and a slide rail structure is provided between the second hem folding seat 503 and the mounting plate 502. When this solution is adopted, the second hem folding seat 503 slides back and forth relative to the first hem folding seat via the slide rail structure.

[0083] The structure and installation method of the first hem-folding actuator 509 are not limited to a single one. This embodiment optimizes and adopts one feasible option: the first hem-folding actuator 509 includes a telescopic cylinder, one end of which is fixed to the mounting plate 502 and the other end is connected to the second hem-folding seat 503 to drive the second hem-folding seat 503 to slide back and forth along the slide rail structure. When adopting this solution, the first hem-folding actuator 509 can also adopt an electric telescopic cylinder or a hydraulic telescopic cylinder.

[0084] The structure of the second hem-folding seat 503 can be constructed in various forms and is not limited to a single form. This embodiment optimizes and adopts one feasible option: the second hem-folding seat 503 comprises a straight L-shaped plate, the lower surface of which cooperates with the slide rail structure, and the upper surface of which is connected and cooperates with the third hem-folding seat 506. When this solution is adopted, the entire L-shaped plate slides back and forth on the first hem-folding seat, driving the third hem-folding seat 506 to move synchronously.

[0085] The structure of the second folding driver 510 can be constructed in various forms and is not limited to a single one. This embodiment is optimized and adopts one of the feasible options: the second folding driver 510 includes a telescopic cylinder, one end of the telescopic cylinder is matched to the second folding seat 503, and the other end is matched to the folding fork 508. The telescopic cylinder drives the folding fork 508 to deflect during the extension or shortening process.

[0086] When the second hemming actuator 510 utilizes a telescopic cylinder, the arrangement of the telescopic cylinders is not strictly limited. This embodiment optimizes and employs one feasible option: two telescopic cylinders are arranged longitudinally at intervals, with the two telescopic cylinders respectively engaged with the upper and lower surfaces of the third hemming seat 506. In this arrangement, the two telescopic cylinders extend and retract synchronously, and their symmetrical arrangement above and below the third hemming seat 506 improves the stability of the deflection hemming process.

[0087] Connecting the telescopic cylinder to the L-shaped plate can be accomplished through a variety of methods, not limited to a single method. This embodiment optimizes and employs one feasible method: the L-shaped plate is provided with a connecting plate 504, the distal end of the telescopic cylinder is horizontally hinged to the connecting plate 504, and the distal end of the telescopic cylinder is horizontally hinged to the hem shift fork 508. In this embodiment, the connecting plate 504 can be integrally formed with the L-shaped plate, welded, or connected via fasteners.

[0088] The structure of the third hem folding seat 506 is not limited to a single one. This embodiment optimizes and adopts one feasible option: the third hem folding seat 506 includes a fork connecting plate 702 and a height adjustment block 505. The fork connecting plate 702 is connected to the second hem folding seat 503 via the height adjustment block 505 and slides synchronously with the second hem folding seat 503. When such a solution is adopted, the hem folding fork 508 includes at least two shifting rods.

[0089] The specific structure and connection arrangement of the shift fork can adopt multiple schemes. This embodiment optimizes and adopts one feasible option: the folding fork 508 includes a shift head, which is rotatably arranged on the third folding seat 506, and the shift head is horizontally hinged with the second folding driver 510. The shift head is connected to a shift rod for folding the carton blank. When adopting this scheme, the shift head is connected to the third folding seat 506 via a rotating shaft and a bearing structure.

[0090] The height adjustment block 505 adopts an integral structure. This embodiment optimizes and adopts one of the feasible options: the height adjustment block 505 includes a pad, and the pad is connected and fixed to the second hem support 503 by a fastener. When such a solution is adopted, the fastener can be a bolt.

[0091] The flanging action component 6 can be constructed in various forms and is not limited to the specific form. This embodiment optimizes and adopts one of the feasible options: the flanging action component 6 includes a flanging base 601, a flanging arm 602 is provided on the flanging base 601, the flanging arm 602 rotates relative to the flanging base 601, and the flanging arm 602 is connected to a flanging shaft 604. The flanging shaft 604 drives the flanging pressure plate 607 to deflect between a flat position and a flanging position. When the flanging pressure plate 607 is in the flat position, it is lower than the bottom of the carton blank and allows the carton blank to pass from above. When the flanging pressure plate 607 is in the flanging position, it drives the flanging edge of the carton blank port to be longitudinally folded. When such a solution is adopted, the port sealing plate of the carton blank is driven upward by the flanging action component 6.

[0092] When the flanging base 601 is in action, it can be implemented through a variety of schemes. This embodiment is optimized and adopts one of the feasible options: the flanging base 601 is provided with a flanging driver 611, and the flanging driver 611 cooperates with the flanging arm 602 and is used to drive the flanging arm 602 to deflect, thereby driving the flanging shaft 604 to rotate to cause the flanging pressure plate 607 to deflect.

[0093] The structure of the flange base 601 can be constructed in various forms. This embodiment is optimized and adopts one of the feasible options: the flange base 601 is provided with an axle seat structure 608, and the axle seat structure 608 is provided with a drive shaft 609 that rotates relative to the flange base 601, and the end of the flange driver 611 is connected to the drive shaft 609.

[0094] The structure of the driver shaft 609 can be optimized. This embodiment adopts one feasible option: the driver shaft 609 is provided with a clamping groove, in which a clamping plate 610 is mounted and fixed. The flanged driver 611 is connected and fixed to the clamping plate 610 and rotates synchronously with the driver shaft 609. In this solution, the clamping plate 610 is embedded in the clamping groove, and when the driver shaft 609 rotates, the clamping plate 610 also rotates synchronously.

[0095] Preferably, the flanging driver 611 described in this embodiment includes a telescopic cylinder.

[0096] To enable the folding arm 602 to more smoothly drive the flanging shaft 604, this embodiment is optimized and adopts one feasible option: an axis hole 603 is formed in the middle of the folding arm 602 and is rotatably connected to the folding base. The axis hole 603 extends toward the end of the folding arm 602 to form a first extension section, which is hingedly connected to the flanging driver 611. The axis hole 603 extends toward the front end of the folding arm 602 to form a second extension section, which is connected to the flanging shaft 604. When this solution is adopted, the first and second extension sections of the folding arm 602 are integrally formed.

[0097] To optimize the structure of the flanged shaft 604, this embodiment employs a feasible option: the flanged shaft 604 is provided with a flanged connection seat 605 for connecting to the flanged pressure plate 607. The flanged connection seat 605 rotates synchronously with the flanged shaft 604 and drives the flanged pressure plate 607 to deflect synchronously. In this solution, the flanged connection seat 605 is an integral connecting block and is fixedly connected to the flanged shaft 604.

[0098] In order to improve the protection effect of the carton blank, the structure of the flanging pressing plate 607 is optimized, and the following feasible option is proposed: a flanging spring piece 606 is provided between the flanging pressing plate 607 and the flanging connecting seat 605. When adopting this solution, the number of flanging spring pieces 606 is several, and metal spring pieces can be used.

[0099] The arrangement of the flanged spring pieces 606 is optimized and one of the feasible options is adopted: the flanged spring pieces 606 are provided in a plurality and are arranged at intervals along the length direction of the flanged connecting seat 605 .

[0100] Preferably, the flanged spring piece 606 described in this embodiment includes a Z-shaped spring piece.

[0101] The swing arm action assembly 8 is used to press the carton blank and serve as an internal stop for folding, so that the folding edge forms a more consistent structure. The structure of the swing arm action assembly 8 is not limited to a single one. This embodiment is optimized and adopts one of the feasible options: the swing arm action assembly 8 includes a first swing arm shaft seat 801 and a second swing arm shaft seat 802, the second swing arm shaft seat 802 is rotatably connected to the first swing arm shaft seat 801, and the second swing arm shaft seat 802 is connected to a lower swing arm 805; the lower end of the lower swing arm 805 is provided with an internal stop structure for stopping the folding edge of the carton blank, the upper part or middle part of the lower swing arm 805 is also provided with a deflection push-pull seat 806, and the swing arm driver 810 is connected to the deflection push-pull seat 806 and drives the lower swing arm 805 to deflect between the stop position and the initial position. When such a solution is adopted, the swing of the lower swing arm 805 can smoothly switch between the stop position and the initial position, and realize the stop effect of the folding forming of the carton blank.

[0102] The second swing arm shaft seat 802 is coupled to a lower limit adjustment block 804. The lower limit adjustment block 804 cooperates with and blocks the lower swing arm 805. When the lower swing arm 805 deflects until it abuts the lower limit adjustment block 804, it reaches its maximum downward swing distance. In this solution, the lower limit adjustment block 804 can be a metal block and connected to the second swing arm shaft seat 802 via fasteners.

[0103] The structure of the second swing arm shaft seat 802 can also be optimized and one feasible option is to adopt: the second swing arm shaft seat 802 is connected to a swing arm base 803, the height of the swing arm base 803 extends toward the top of the lower swing arm 805, and the lower limit adjustment block 804 is disposed on the top of the swing arm base 803. In this solution, the swing arm base 803 is a metal seat block and is fixedly connected to the second swing arm shaft seat 802.

[0104] The arrangement of the lower limit adjustment block 804 is not limited to a single method. This embodiment optimizes and adopts one feasible option: the lower limit adjustment block 804 is rotatably connected to the swing arm base 803. When the lower limit adjustment block 804 rotates relative to the swing arm base 803, the length of the lower limit adjustment block 804 extending toward the lower swing arm 805 can be adjusted. When this solution is adopted, the lower limit adjustment block 804 can limit the deflection and swing angle of the lower swing arm 805.

[0105] The structure of the deflection push-pull seat 806 can be optimized. This embodiment adopts one feasible option: the deflection push-pull seat 806 includes a push-pull plate, which is hinged to the lower end of the swing arm driver 810. When this solution is adopted, the push-pull plate and the lower swing arm 805 are integrally formed.

[0106] The swing arm actuator 810 can adopt a variety of structures, which are not limited to a single one. This embodiment optimizes and adopts one feasible option: the swing arm actuator 810 includes a telescopic cylinder, the upper end of which is connected to an articulated seat, and the lower end of which is connected to and drives the deflection push-pull seat 806. In this solution, the articulated seat is fixed, and when the swing arm actuator 810 is extended or retracted, it deflects relative to the articulated seat.

[0107] The inner retaining structure can be constructed in various forms and is not limited to a single form. This embodiment optimizes and adopts one feasible option: the inner retaining structure includes a lower pressing block 809, which is formed with a lower pressing surface for pressing the carton blank. When this solution is adopted, the lower pressing surface is a flat surface, and a flexible pressing layer can also be provided.

[0108] Preferably, the inner stop structure described in this embodiment further includes an inner stop telescopic member 808 , which is connected to the lower pressing block 809 and drives the lower pressing block 809 to rise and fall in the longitudinal direction.

[0109] The matching structure between the lower swing arm 805 and the inner telescopic member 808 is not limited to a single one. This embodiment is optimized and adopts one of the feasible options: the lower swing arm 805 is provided with a mounting connecting plate 807, and the inner telescopic member 808 is fixed on the mounting connecting plate 807.

[0110] Preferably, the inner stop telescopic member 808 in this embodiment comprises a telescopic cylinder. The inner stop telescopic member 808 can also be a hydraulic telescopic cylinder or an electric telescopic cylinder.

[0111] During the transportation process, the carton blank also needs to be supported from the bottom to ensure stable and reliable folding. Specifically, this embodiment is optimized and adopts one of the feasible options: it also includes a bottom plate cylinder assembly 11, which is arranged on the base mechanism and is used to support the carton blank. When the bottom plate cylinder assembly 11 moves to the upper support position, it contacts and supports the carton blank. When the bottom plate cylinder assembly 11 retreats to the initial position, it separates from the carton blank. When such a solution is adopted, the bottom plate cylinder assembly 11 moves along with the carton blank, performs a supporting action when the carton blank is hovering, and separates and cancels the support when the carton blank moves.

[0112] In the process of folding the paper box blank, the two long sides of the paper box blank are also formed by folding. Specifically, this embodiment is optimized and adopts one of the feasible options: the fixed side operating mechanism 2 also includes a long side folding mechanism, and the long side folding mechanism includes a long side folding plate 201 for folding the paper box blank along the long side to form a box cover, and also includes a guiding mechanism 202 for guiding the box cover.

[0113] The guide mechanism 202 is used to keep the box lid open without affecting the folding and forming of the front and rear ports of the box body. The guide mechanism 202 can be constructed in various forms and is not limited to a single form. This embodiment is optimized and adopts one of the feasible options: the guide mechanism 202 includes a guide plate and / or a guide frame.

[0114] The above are the implementation methods listed in this embodiment, but this embodiment is not limited to the above optional implementation methods. Those skilled in the art can arbitrarily combine the above methods to obtain other various implementation methods. Anyone can derive other various implementation methods based on the inspiration of this embodiment. The above specific implementation methods should not be understood as limiting the scope of protection of this embodiment. The scope of protection of this embodiment should be based on the definition in the claims.

Claims

1. A mid-position transmission mechanism for an automatic box folding machine, characterized by: The intermediate transmission mechanism (9) comprises a first transmission assembly (901) and a second transmission assembly (902), wherein the first transmission assembly (901) and the second transmission assembly (902) are arranged in series and used to drive the carton blank to move along the folding mechanism and hover to complete the folding; the first transmission assembly (901) and the second transmission assembly (902) are both provided with a synchronization mechanism (10) for cooperating with the carton blank.

2. The center transmission mechanism of the automatic box folding machine according to claim 1, characterized in that: The first transmission assembly (901) and the second transmission assembly (902) both include a synchronous belt, which is driven by a drive motor (105) and moves back and forth; the synchronous belt is connected to the synchronization mechanism (10) and drives the synchronization mechanism (10) to move back and forth synchronously.

3. The center transmission mechanism of the automatic box folding machine according to claim 1 or 2, characterized in that: The synchronization mechanism (10) includes a synchronization base (1001), and a plurality of suction cups (1002) are provided on the synchronization base (1001). The suction cups (1002) are connected to the suction cup air path and are used to absorb the carton blank. When the carton blank reaches the transmission mechanism (9), the suction cups (1002) adhere to the carton blank and discharge air through the suction cup air path to form negative pressure adsorption, thereby driving the carton blank to move synchronously, and then introduce air through the suction cup air path to release the negative pressure adsorption.

4. The center transmission mechanism of the automatic box folding machine according to claim 3, characterized in that: An air cavity is formed in the synchronous base (1001) and is connected to a suction cup mounting port on its surface, and the suction cup is connected to the suction cup mounting port and is connected to the air cavity; the air cavity is also connected to an air inlet and an air outlet on the synchronous base, and an air intake control component and an air outlet control component are respectively provided at the air inlet and the air outlet.

5. The center transmission mechanism of the automatic box folding machine according to claim 1, characterized in that: The transmission mechanism (9) further includes a transition support assembly (903), wherein the transition support assembly (903) includes a column and a transition top plate on the column, wherein the transition top plate extends from the first transmission assembly (901) to the second transmission assembly (902), and the transition top plate includes an upwardly inclined support surface.

6. The center transmission mechanism of the automatic box folding machine according to claim 1, characterized in that: The transmission mechanism (9) further comprises a third transmission assembly (904), which is connected to the second transmission assembly (902) and is used to transport the carton blank backward. The third transmission assembly (904) is provided with a lever assembly (907) for driving the carton blank backward.

7. The intermediate transmission mechanism of the automatic box folding machine according to claim 6, characterized in that: The lever assembly (907) includes a lever arm arranged on the third transmission assembly (904) and circulates along with the third transmission assembly (904). When the carton blank moves along with the second transmission assembly (902) and reaches the third transmission assembly (904), it is moved along by the lever arm.

8. The center transmission mechanism of the automatic box folding machine according to claim 6, characterized in that: The transmission mechanism (9) further includes a transmission frame, which includes a transmission base (905) and a support group. The first support frame group provided on the transmission base (905) is used to cooperate with and fix the first transmission component (901), the second support frame group provided is used to cooperate with and fix the second transmission component (902), and the third support frame group provided is used to cooperate with and fix the third transmission component (904).

9. The intermediate transmission mechanism of the automatic box folding machine according to claim 8, characterized in that: The third transmission assembly (904) includes a transmission chain plate fixedly coupled to the third support frame assembly, the transmission chain plate being provided with a chain that circulates and moves forward, and the transmission chain plate is also connected to a third drive motor (105) for driving the chain to move forward.

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