Full-automatic three-dimensional double-piece box nailing machine

Abstract

The invention relates to the technical field of carton processing equipment, and particularly discloses a full-automatic three-dimensional double-piece carton nailing machine which comprises a first rack, a conveying part, a folding part, a paper feeding part, a carton nailing part, a carton turning part and a counting and discharging part. A left paper folding part and a right paper folding part of the folding part respectively comprise an edge folding mechanism and a folding mechanism, a left paper feeding machine and a right paper feeding machine of the paper feeding part can move along a track, and the height of the right paper feeding machine can be adjusted through a lead screw lifting mechanism. A second lifting mechanism is arranged at the bottom of a left box nailing machine of the box nailing part, and the height can be adjusted according to needs. In addition, a limiting mechanism composed of a pneumatic telescopic rod and a baffle is arranged between the carton nailing part and the carton overturning part, the carton overturning part achieves automatic carton overturning through a guide piece and a pressing strip, and the counting and discharging part adopts a photoelectric counter to count the cartons and automatically discharge the cartons. The full-process automatic precise operation can be realized, the labor intensity of workers is reduced, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of carton processing equipment, in particular to a fully automatic three-dimensional double-piece carton stitching machine. Background Art

[0002] In the modern packaging industry, cartons are commonly used packaging materials, and their production efficiency and quality directly affect the packaging cost and market competitiveness of products. With the rapid development of science and technology, the application of automation technology in the field of carton processing equipment has become more and more extensive, and various types of automated carton stitching machines have emerged continuously, aiming to improve production efficiency, reduce labor intensity, and improve the stability of product quality.

[0003] Chinese patent CN14536866A discloses a fully automatic nailing machine for top and bottom covers, including a nailing machine base, an electrical box and four nail heads, the electrical box is fixedly installed on the nailing machine base, four first hydraulic push rods are fixedly installed on the top of the nailing machine base, the tops of the four first hydraulic push rods are fixedly connected with vertical folding blocks, the front and back of the vertical folding blocks on the left and right sides are fixedly installed with second hydraulic push rods, the output ends of the four second hydraulic push rods are fixedly connected with horizontal folding blocks, the top of the nailing machine base is fixedly installed with a support arm, the top of the support arm is fixedly installed with a third hydraulic push rod, and the bottom end of the third hydraulic push rod is fixedly connected with a pressing plate. It automatically conveys cardboard through a feeding mechanism, uses a hydraulic push rod to drive the folding block to achieve semi-automatic folding of the cardboard, and then controls the nail head to perform nailing operation by the electrical box, which realizes automated production to a certain extent and reduces manual operation links. However, the equipment still has obvious deficiencies in the degree of automation.

[0004] In summary, a fully automatic three-dimensional double-piece carton stitching machine is needed to meet the requirements for efficiency and automation of carton production. Summary of the invention

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A fully automatic three-dimensional double-piece box stitching machine, comprising: Frame 1, the frame 1 comprising a bottom support frame and a lifting gantry frame arranged above the bottom support frame; The conveying part includes an upper conveyor and a lower conveyor, wherein the upper conveyor is arranged on the upper part of the bottom support frame, and the lower conveyor is connected to the lifting gantry through a beam frame and is arranged parallel to and directly above the upper conveyor; The folding part includes a left folding part and a right folding part, which are respectively arranged on the left and right sides of the upper paper end of the conveying part. The paper feeding part includes a left paper feeding machine and a right paper feeding machine, wherein the left paper feeding machine and the right paper feeding machine are respectively arranged on the outside of the left paper folding part and the right paper folding part; The box-stitching part includes a left box-stitching machine and a right box-stitching machine, which are respectively arranged on the left and right sides of the other end of the conveying part; The box turning part is arranged outside the paper discharge end of the conveying part; The counting and discharging part is arranged outside the output end of the box turning part.

[0007] Preferably, both the upper conveyor and the lower conveyor use servo motors as power sources.

[0008] Preferably, the left paper folding part includes an upper folding mechanism and a lower folding mechanism, the upper folding mechanism is arranged on the left side of the beam, and the lower folding mechanism is arranged on the left side of the bottom support frame; the right paper folding part includes a lower folding mechanism and an upper folding mechanism, the lower folding mechanism is arranged on the right side of the bottom support frame, and the upper folding mechanism is arranged on the right side of the beam.

[0009] Preferably, the lower folding mechanism comprises a fixing bracket 1, one end of which is fixedly connected to the left side of the bottom support frame, the other end of which is provided with a mounting plate 1 tilted inwardly and upwardly, a telescopic mechanism 1 is provided on the mounting plate 1, the extended end of which is tilted upwardly and a pressure rod 1 is provided at the end of the extended end; The upper folding mechanism comprises a second fixing bracket, one end of which is fixedly connected to the right side of the beam frame, and the other end of which is inclined inwardly and downwardly provided with a second mounting plate, on which a second telescopic mechanism is provided, and the extended end of the second telescopic mechanism extends downwardly and obliquely, and a second pressure rod is provided at the end of the extended end; The upper folding mechanism includes a fixed bracket three, one end of which is fixedly connected to the left side of the beam frame, and the lower part of the other end of the fixed bracket three is vertically connected to a limit baffle plate one, and a telescopic mechanism three is vertically arranged downward on the fixed bracket three between the limit baffle plate one and the beam frame, and a pressing plate one is arranged at the protruding end of the telescopic mechanism three; The lower folding mechanism includes a fixed bracket four, one end of which is fixedly connected to the right side of the beam, and the other end of the fixed bracket four is vertically connected to a limiting baffle plate two at the lower part, and a telescopic mechanism four is vertically arranged downward on the fixed bracket four between the limiting baffle plate two and the beam, and a pressure plate two is arranged at the protruding end of the telescopic mechanism four.

[0010] Preferably, the left paper feeder includes a frame 2, a track pointing to the frame 1 is arranged below the frame 2, a roller is arranged at the bottom of the frame 2, the roller rolls in the track, and a conveyor 1 is horizontally arranged in the middle of the frame 2. The right paper feeder includes a frame three, a track pointing to the frame one is also arranged below the frame three, rollers are also arranged at the bottom of the frame three, the rollers roll in the track, a lifting mechanism is arranged on the frame three, a frame four is arranged on the upper part of the lifting mechanism, and a conveyor two is horizontally arranged in the middle part of the frame four.

[0011] Preferably, a conveyor 3 is further arranged inside the conveyor 1, the conveyor 3 is connected to the frame 2, and the conveyor 1 and the conveyor 3 are at the same level. A conveyor 4 is also arranged inside the conveyor 2, and the conveyor 4 is connected to the frame 4, and the conveyor 2 and the conveyor 4 are at the same horizontal height.

[0012] Preferably, a clamping mechanism is provided on the top of the frame two and the top of the frame four, and the two clamping mechanisms are respectively located above the conveyor one and the conveyor two, and the clamping mechanism includes a transversely arranged slide rail, on which two vertically arranged and perpendicular clamping plates are slidably arranged, and a slider is also slidably arranged on the slide rail between the two clamping plates, and a baffle is provided on the outward side of the slider for lifting and lowering.

[0013] Preferably, a limiting mechanism is arranged on the side of the conveying part between the box nailing part and the box turning part, and the limiting mechanism includes a transversely arranged telescopic mechanism five, the extended end of the telescopic mechanism points to the conveying part, a baffle is arranged at the extended end of the telescopic mechanism five, and the telescopic mechanism five is arranged on the frame one.

[0014] Preferably, the box turning section includes a conveyor five, which is arranged on the outside of the paper outlet end of the conveying section, a guide plate is arranged at the end of the upper conveyor, and a pressure strip is arranged on one side of the conveyor five, the extension direction of the pressure strip is consistent with the conveying direction of the conveyor five, and is inclined inward.

[0015] Preferably, a lifting mechanism 2 is provided at the bottom of the left box nailing machine.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a fully automatic design, and all components work together to realize full process automation from paper feeding, folding, stapling to box turning, counting and discharging, which greatly reduces manual intervention and improves production speed. Compared with traditional box stapling machines, production efficiency is significantly improved.

[0017] 2. The servo motor control of the conveying part of the present invention ensures accurate cardboard conveying. The fine structural design and adjustable components of the folding part and the nailing box part can adapt to cardboards of different specifications, ensure the molding quality of the carton and the firmness of the nailing box, and reduce the defective rate.

[0018] 3. The lifting gantry of the frame 1 of the present invention and the adjustable design of each component, such as the movable structure of the left and right paper folding parts and the lifting mechanism 2 of the left box nailer, enable the equipment to adapt to the production of cartons of different sizes and types and have stronger versatility.

[0019] Fourth, the automated operation process of the present invention reduces the manual operation links, and workers only need to perform simple loading and monitoring work, which reduces labor intensity and also improves the safety of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a top view of the overall structure of the present invention; Figure 2 It is a side view of the left folding paper portion of the present invention; Figure 3 It is a schematic diagram of the structure of the upper folding mechanism and the lower folding mechanism of the present invention; Figure 4 It is a schematic diagram of the structure of the lower folding mechanism and the upper folding mechanism of the present invention; Figure 5 It is a structural schematic diagram of the left paper feeder of the present invention; Figure 6 It is a schematic structural diagram of the right paper feeder of the present invention.

[0021] In the figure: 1. Frame 1; 11. Bottom support frame; 12. Lifting gantry; 2. Conveying unit; 21. Upper conveyor; 22. Lower conveyor; 23. Beam frame; 3. Folding unit; 31. Left folding unit; 311. Upper folding mechanism; 3111. Fixed bracket 3; 3112. Limit baffle 1; 3113. Telescopic mechanism 3; 3114. Pressing plate 1; 312. Lower folding mechanism; 3121. Fixed bracket 1; 3122. Mounting plate 1; 3123. Telescopic mechanism 1; 3124. Pressing rod 1; 32. Right folding unit; 321. Lower folding mechanism; 3211. Fixed bracket 4; 3212. Limit baffle 2; 3213. Telescopic mechanism 4; 3214. Pressing plate 2; 322. Upper folding mechanism; 3221. Fixed bracket 2; 3222 , mounting plate two; 3223, telescopic mechanism two; 3224, pressure rod two; 4, paper feeding unit; 41, left paper feeder; 411, frame two; 412, track; 413, roller; 414, conveyor one; 415, conveyor three; 42, right paper feeder; 421, frame three; 422, track; 423, roller; 424, lifting mechanism; 425, frame four; 426, conveyor two; 427, conveyor four; 5, box nailing unit; 51, left box nailing machine; 52, right box nailing machine; 6, box turning unit; 61, conveyor five; 62, guide plate; 63, pressure strip; 7, counting and discharging unit; 8, clamping mechanism; 81, slide rail; 82, clamping plate; 83, slider; 84, baffle; 9, limiting mechanism; 91, telescopic mechanism five; 92, baffle. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0025] like Figure 1-6 As shown, the present invention provides a fully automatic three-dimensional double-piece box nailing machine, which is mainly composed of a frame 1, a conveying part 2, a folding part 3, a paper feeding part 4, a box nailing part 5, a box turning part 6 and a counting and discharging part 7. The frame 1 serves as the supporting base of the equipment, including a bottom support frame 11 and a lifting gantry 12, which provide installation positions for other components. The upper conveyor 21 and the lower conveyor 22 of the conveying part 2 are respectively arranged on the upper part of the bottom support frame 11 and the lifting gantry 12, and are arranged in parallel up and down, for conveying the cardboard to be processed. The left folding part 31 and the right folding part 32 of the folding part 3 are respectively located on the left and right sides of the upper paper end of the conveying part 2, and are responsible for folding and forming the cardboard. The left paper feeder 41 and the right paper feeder 42 of the paper feeding part 4 are respectively arranged on the outside of the left folding part 31 and the right folding part 32, so as to realize the automatic paper feeding function. The left and right staplers 51 and 52 of the stapler unit 5 are located on the left and right sides of the other end of the conveyor unit 2 to complete the staple operation. The box turning unit 6 is arranged outside the paper output end of the conveyor unit 2 to turn over the stapled cartons, and the counting and discharging unit 7 is located outside the output end of the box turning unit 6 to count and discharge the finished cartons.

[0026] In this embodiment, the lifting gantry 12 adopts a screw lifting solution, and the motor drives the screw to rotate, driving the gantry to move up and down along the screw, thereby achieving precise adjustment of the height of the components installed on the gantry to meet the production requirements of cartons of different specifications.

[0027] In this embodiment, the upper conveyor 21 and the lower conveyor 22 both use servo motors as power sources. The servo motors of the upper conveyor 21 and the lower conveyor 22 are connected to the control system. According to the preset program and the signal fed back by the sensor, the conveying speed and start and stop are accurately controlled. The conveying speed and position can be accurately controlled to ensure the stability and accuracy of cardboard conveying, providing a reliable foundation for subsequent folding, nailing and other operations.

[0028] In this embodiment, the left paper folding part 31 is composed of an upper folding mechanism 311 and a lower folding mechanism 312. The upper folding mechanism 311 is installed on the left side of the beam frame 23, and the lower folding mechanism 312 is installed on the left side of the bottom support frame 11. One end of the fixed bracket 1 3121 of the lower folding mechanism 312 is fixed to the left side of the bottom support frame 11, and the other end is connected to the mounting plate 1 3122 in an inwardly inclined manner upward, and a pneumatic telescopic rod is arranged on the mounting plate 1 3122 as a telescopic mechanism 1 3123. The extended end of the pneumatic telescopic rod extends upwardly in an inclined manner, and a pressure rod 1 3124 is installed at the end. One end of the fixed bracket 3 3111 of the upper folding mechanism 311 is fixed to the left side of the beam frame 23, and the lower part of the other end is vertically connected to the limit baffle 1 3112. A pneumatic telescopic rod is vertically arranged downward on the fixed bracket 3 3111 between the limit baffle 1 3112 and the beam frame 23 as a telescopic mechanism 3 3113, and a pressure plate 1 3114 is installed on its extended end.

[0029] The right folding part 32 includes a lower folding mechanism 321 and an upper folding mechanism 322. The lower folding mechanism 321 is arranged on the right side of the bottom support frame 11, and the upper folding mechanism 322 is arranged on the right side of the beam frame 23. One end of the fixed bracket 4 3211 of the lower folding mechanism 321 is fixed to the right side of the beam frame 23, and the lower part of the other end is vertically connected to the limit baffle 2 3212. A pneumatic telescopic rod is vertically downwardly arranged on the fixed bracket 4 3211 between the limit baffle 2 3212 and the beam frame 23 as a telescopic mechanism 4 3213, and a pressing plate 2 3214 is installed at the extended end. One end of the fixed bracket 2 3221 of the upper folding mechanism 322 is fixed to the right side of the beam frame 23, and the other end is tilted inward and downwardly connected to the mounting plate 2 3222. A pneumatic telescopic rod is arranged on the mounting plate 2 3222 as a telescopic mechanism 2 3223, and its extended end is tilted and extended downward, and a pressing rod 2 3224 is installed at the end. All pneumatic telescopic rods are connected to the air source and control system, and the control system accurately controls the telescopic movement of the telescopic rods.

[0030] In this embodiment, a track 412 pointing to the frame 1 is provided below the frame 2 411 of the left paper feeder 41, and a roller 413 at the bottom of the frame 2 411 can roll in the track 412, and a conveyor 1 414 is horizontally installed in the middle of the frame 2 411; a track 422 pointing to the frame 1 is also provided below the frame 3 421 of the right paper feeder 42, and a roller 423 at the bottom of the frame 3 421 can also roll in the track 422, and a screw lifting mechanism 424 is provided on the frame 3 421 as a lifting mechanism, and a conveyor 2 426 is horizontally provided in the middle of the frame 4 425 above it. The frame 2 411 of the left paper feeder 41 can move on the track 412 through the roller 413, and the position of the frame 2 411 can be adjusted to meet the requirements of different paper feeding positions, and the conveyor 1 414 is used to transport paperboard. The frame 3 421 of the right paper feeder 42 can move on the track 422. The frame 3 421 is provided with a screw lifting mechanism 424 as a lifting mechanism. The upper part of the lifting mechanism 424 is provided with a frame 4 425, and the middle part of the frame 4 425 is provided with a conveyor 2 426. The frame 4 425 can be raised and lowered by driving the screw to rotate by a motor, so as to adjust the height of the conveyor 2 426 to meet the conveying requirements of paperboards of different thicknesses. In this embodiment, the conveyor 1 414 and the conveyor 2 426 are both negative pressure suction conveyors.

[0031] In this embodiment, a clamping mechanism 8 is provided on the top of both the frame 2 411 and the frame 4 425, and two vertical clamping plates 82 perpendicular to the slide rail 81 are slidably arranged on the transverse slide rail 81 of the clamping mechanism 8, and a sliding block 83 is slidably arranged on the slide rail 81 between the two clamping plates 82, and a blocking plate 84 is arranged on the outward side of the sliding block 83 which is lifted and lowered by a pneumatic telescopic rod.

[0032] In this embodiment, the lifting mechanism 2 disposed at the bottom of the left box stapler 51 can adjust the height according to the thickness of the cardboard or actual production requirements to ensure the quality and effect of the box staplers.

[0033] In this embodiment, the limiting mechanism 9 is arranged on the side of the conveying part 2 between the nailing part 5 and the turning part 6, and is composed of a transversely arranged pneumatic telescopic rod as a telescopic mechanism 5 91 and a baffle 92 at the end, and is installed on the frame 1 to limit the cardboard being conveyed.

[0034] In this embodiment, the carton turning section 6 includes a conveyor 61, which is arranged on the outside of the paper outlet end of the conveying section 2. A guide piece 62 is provided at the end of the upper conveyor 21. A pressure strip 63 is provided on one side of the conveyor 61, which is inclined inward and extends in the same direction as the conveying direction, to realize automatic carton turning.

[0035] In this embodiment, the counting and discharging unit 7 uses a photoelectric counter as a counting device, which is connected to the control system to count the cartons passing through. When the set number is reached, the relevant components are controlled to automatically collect and discharge the cartons. On this basis, subsequent automatic packaging and palletizing equipment can be further connected.

[0036] The working principle of the above technical solution is: This equipment adopts a control system with a programmable logic controller (PLC) as the core, combined with various sensors and motor drivers to achieve precise control of each component.

[0037] Before use, first adjust the height of the lifting gantry 12 and the left nailing machine 51 according to the specifications of the cartons to be processed to adapt to the height of the cartons, adjust the distance between the two clamping plates 82 to adapt to the width of the cardboard, and adjust the height of the bottom end of the baffle 84 to adapt to the thickness of the cardboard.

[0038] During production, the two paperboards constituting the carton are first placed on the conveyor 1 414 and the conveyor 2 426, respectively, and the control system starts the conveyor 1 414 and the conveyor 2 426 to convey the paperboards to the folding section 3. The paperboards conveyed by the left paper feeder 41 and the right paper feeder 42 stop moving left and right under the blockage of the limit baffle 2 3212 and the limit baffle 1 3112, respectively, and move forward with the lower conveyor 22 and the upper conveyor 21. After the position sensor provided on the beam 23 detects the arrival position information of the paperboard, the control system controls the movement of each pneumatic telescopic rod to complete the folding and folding operation of the paperboard. The two folded and stacked cardboards are conveyed to the box nailing section 5 through the conveying section 2. They stop moving when blocked by the baffle 92. The sensor provided in the box nailing section 5 detects the cardboard, and the control system controls the left nailing machine 51 and the right nailing machine 52 to perform the box nailing operation. After completion, the control system controls the telescopic mechanism 5 91 to contract, and the carton enters the box turning section 6. The box turning is completed under the action of the guide piece 62 and the pressure strip 63. The turned carton passes through the conveyor 5 61 and the counting and discharging section 7, and the photoelectric counter counts the carton. The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fully automatic three-dimensional double-piece box stitching machine, characterized in that: include: Frame one (1), the frame one (1) comprising a bottom support frame (11) and a lifting gantry (12) arranged above the bottom support frame (11); The conveying section (2) comprises an upper conveyor (21) and a lower conveyor (22), wherein the upper conveyor (21) is arranged on the upper part of the bottom support frame (11), and the lower conveyor (22) is connected to the lifting gantry (12) via a beam frame (23) and is arranged in parallel and directly above the upper conveyor (21); The folding portion (3) comprises a left paper folding portion (31) and a right paper folding portion (32), which are respectively arranged on the left and right sides of the upper paper end of the conveying portion (2); A paper feeding section (4), comprising a left paper feeding machine (41) and a right paper feeding machine (42), wherein the left paper feeding machine (41) and the right paper feeding machine (42) are respectively arranged on the outside of the left paper folding section (31) and the right paper folding section (32); The box stapling section (5) comprises a left box stapling machine (51) and a right box stapling machine (52), which are respectively arranged on the left and right sides of the other end of the conveying section (2); A box turning section (6) is arranged outside the paper discharge end of the conveying section (2); The counting and discharging section (7) is arranged outside the output end of the box turning section (6).

2. The fully automatic three-dimensional double-piece box stitching machine according to claim 1, characterized in that: The upper conveyor (21) and the lower conveyor (22) both use servo motors as power sources.

3. The fully automatic three-dimensional double-piece box stitching machine according to claim 1, characterized in that: The left paper folding part (31) comprises an upper folding mechanism (311) and a lower folding mechanism (312); the upper folding mechanism (311) is arranged on the left side of the beam frame (23); the lower folding mechanism (312) is arranged on the left side of the bottom support frame (11); the right paper folding part (32) comprises a lower folding mechanism (321) and an upper folding mechanism (322); the lower folding mechanism (321) is arranged on the right side of the bottom support frame (11); and the upper folding mechanism (322) is arranged on the right side of the beam frame (23).

4. The fully automatic three-dimensional double-piece box stitching machine according to claim 3, characterized in that: The lower folding mechanism (312) comprises a fixing bracket (3121), one end of which is fixedly connected to the left side of the bottom support frame (11), and the other end of which is provided with a mounting plate (3122) tilted inwardly and upwardly, and a telescopic mechanism (3123) is provided on the mounting plate (3122), and the extending end of the telescopic mechanism (3123) is tiltedly extended upwardly, and a pressure rod (3124) is provided at the end of the extending end; The upward folding mechanism (322) comprises a second fixing bracket (3221), one end of which is fixedly connected to the right side of the beam frame (23), and the other end of the second fixing bracket (3221) is provided with a second mounting plate (3222) tilted inwardly and downwardly, and a second telescopic mechanism (3223) is provided on the second mounting plate (3222), and the extended end of the second telescopic mechanism (3223) is extended downwardly and tilted, and a second pressure rod (3224) is provided at the end of the extended end; The upper folding mechanism (311) comprises a fixed bracket three (3111), one end of the fixed bracket three (3111) is fixedly connected to the left side of the beam frame (23), the other end of the fixed bracket three (3111) is vertically connected to a limit baffle plate one (3112) at the lower part, a telescopic mechanism three (3113) is vertically arranged downward on the fixed bracket three (3111) between the limit baffle plate one (3112) and the beam frame (23), and a pressing plate one (3114) is arranged at the protruding end of the telescopic mechanism three (3113); The lower folding mechanism (321) comprises a fixed bracket four (3211), one end of the fixed bracket four (3211) is fixedly connected to the right side of the beam frame (23), the other end of the fixed bracket four (3211) is vertically connected to the limit baffle plate two (3212) at the lower part, and a telescopic mechanism four (3213) is vertically arranged downward on the fixed bracket four (3211) between the limit baffle plate two (3212) and the beam frame (23), and a pressing plate two (3214) is arranged at the protruding end of the telescopic mechanism four (3213).

5. The fully automatic three-dimensional double-piece box stitching machine according to claim 1, characterized in that: The left paper feeder (41) comprises a frame 2 (411), a track (412) pointing to the frame 1 (1) is arranged below the frame 2 (411), a roller (413) is arranged at the bottom of the frame 2 (411), the roller (413) rolls in the track (412), and a conveyor 1 (414) is arranged horizontally in the middle of the frame 2 (411); The right paper feeder (42) comprises a frame three (421), a track (422) pointing to the frame one (1) is also arranged below the frame three (421), a roller (423) is also arranged at the bottom of the frame three (421), the roller (423) rolls in the track (422), a lifting mechanism (424) is arranged on the frame three (421), a frame four (425) is arranged on the upper part of the lifting mechanism (424), and a conveyor two (426) is horizontally arranged in the middle part of the frame four (425).

6. The fully automatic three-dimensional double-piece box stitching machine according to claim 5, characterized in that: A conveyor 3 (415) is also arranged inside the conveyor 1 (414), and the conveyor 3 (415) is connected to the frame 2 (411), and the conveyor 1 (414) and the conveyor 3 (415) are at the same level; A conveyor 4 (427) is also arranged inside the conveyor 2 (426), and the conveyor 4 (427) is connected to the frame 4 (425), and the conveyor 2 (426) and the conveyor 4 (427) are at the same level.

7. The fully automatic three-dimensional double-piece box stitching machine according to claim 6, characterized in that: A clamping mechanism (8) is provided at the top of the second frame (411) and the top of the fourth frame (425). The two clamping mechanisms (8) are respectively located above the first conveyor (414) and the second conveyor (426). The clamping mechanism (8) comprises a transversely arranged slide rail (81), on which two vertically arranged clamping plates (82) perpendicular to the slide rail (81) are slidably arranged, and a sliding block (83) is also slidably arranged on the slide rail (81) between the two clamping plates (82), and a baffle (84) is provided on the outward side of the sliding block (83) for lifting.

8. The fully automatic three-dimensional double-piece box stitching machine according to claim 1, characterized in that: A limiting mechanism (9) is arranged on the side of the conveying part (2) between the box nailing part (5) and the box turning part (6), and the limiting mechanism (9) comprises a telescopic mechanism five (91) arranged transversely, the extended end of the telescopic mechanism five (91) points to the conveying part (2), a baffle (92) is arranged at the end of the extended end of the telescopic mechanism five (91), and the telescopic mechanism five (91) is arranged on the frame one (1).

9. The fully automatic three-dimensional double-piece box stitching machine according to claim 8, characterized in that: The box turning section (6) comprises a conveyor five (61), which is arranged on the outer side of the paper outlet end of the conveying section (2). A guide piece (62) is arranged at the end of the upper conveyor (21), and a pressure strip (63) is arranged on one side of the conveyor five (61). The extension direction of the pressure strip (63) is consistent with the conveying direction of the conveyor five (61) and is inclined inward.

10. The fully automatic three-dimensional double-piece box stitching machine according to claim 1, characterized in that: A second lifting mechanism is provided at the bottom of the left box nailing machine (51).

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