Carton transparent paper folding device

Abstract

The utility model discloses a carton transparent paper folding device, and belongs to the technical field of tobacco packaging machinery. The device comprises a machine box, a swing mechanism, an upper folding mechanism and a lower folding mechanism, the swing mechanism, the upper folding mechanism and the lower folding mechanism are arranged on the machine box, the upper folding mechanism and the lower folding mechanism are located on the same side of the swing mechanism, and the upper folding mechanism is located above the lower folding mechanism. Firstly, the upper long edge of transparent paper is folded to the right side face of a carton to be processed through the upper folding mechanism, then the lower long edge of the transparent paper is partially folded to the upper long edge through the lower folding mechanism, and then execution pieces of the upper folding mechanism and the lower folding mechanism synchronously move upwards by a certain distance; the upper long edge and the lower long edge of the transparent paper are completely attached to the right side face of the carton to be processed, gaps can be effectively eliminated, it is ensured that the transparent paper wrapping the outer surface of the carton is in an unfolded and straightened state after heat sealing, the wrinkle phenomenon is avoided, and the heat sealing quality and the appearance of the transparent paper of the carton are improved.

Description

Technical Field

[0001] The utility model relates to a transparent paper folding device for a strip box, belonging to the technical field of tobacco packaging machinery. Background Art

[0002] Many products packaged in paper boxes are wrapped with a layer of transparent paper, which not only provides some protection but also enhances the appearance of the packaging. In the tobacco industry, in addition to these two functions, transparent paper also protects cigarettes from moisture. Cigarette cartons also require a layer of sealing transparent paper. Traditional packaging equipment often produces wrinkles on the thin, easily pliable transparent paper, affecting the product's appearance. Furthermore, the crucial folding process is the long edge of the transparent paper, which often results in looseness and slippage, disrupting normal production.

[0003] To this end, the Chinese patent document with publication number CN216709827U discloses a device for folding the long edges of transparent paper for cigarette strips. When the accommodating chamber at the feeding position begins to make a clockwise stepping motion upward, the upper long edge of the cigarette strip inside it will be interfered with by the left edge of the pressure sealing plate, thereby folding the upper long edge downward to achieve the folding of the upper long edge. Before this, the folding lower knife will swing upward to fold the lower long edge of the transparent paper upward, forming a tendency to surround the cigarette strip, and under the action of the folding lower knife, it will always stick to the left side of the cigarette strip. Finally, the upper long edge folded down by the folding upper knife will cover the lower long edge that has already stuck to the left side of the cigarette strip, and together enter the area between the pressure sealing plate and the rotating wheel.

[0004] The device limits the upper long side and the lower long side through the inner surface of the sealing plate so that the two remain in an overlapping state. However, since the inner surface of the sealing plate is a circular arc surface and the left side of the cigarette is a plane, there must be a large gap between the inner surface of the sealing plate and the left side of the cigarette, which further causes the transparent paper to become loose and prone to wrinkles when the sealing component presses down the upper long side and the lower long side for sealing. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a transparent paper folding device for a strip box.

[0006] The utility model is achieved through the following technical solutions:

[0007] A transparent paper folding device for a strip box comprises a machine case and a rotating mechanism, an upper folding mechanism and a lower folding mechanism arranged on the machine case. The upper folding mechanism and the lower folding mechanism are located on the same side of the rotating mechanism, and the upper folding mechanism is located above the lower folding mechanism.

[0008] The rotary mechanism includes a support sleeve, a rotating sleeve and a forming wheel. The support sleeve is fixedly mounted on the chassis. The rotating sleeve is coaxially arranged in the support sleeve and is rotatably connected to the support sleeve. One end of the rotating sleeve is provided with a gear A. One end of the forming wheel is fixedly connected to the end of the rotating sleeve away from the gear A. An even number of accommodating cavities are evenly spaced on the circumferential surface of the forming wheel.

[0009] An adsorption tube is respectively provided on both sides of the circumference of each accommodating cavity on the forming wheel, and a plurality of vent holes are opened on the adsorption tube.

[0010] The device further comprises a pushing mechanism, a portion of which is located inside the forming wheel and another portion of which extends into the chassis.

[0011] The pushing mechanism includes a mounting sleeve, a transmission shaft and a support frame. The mounting sleeve is arranged in the chassis. A servo motor is arranged in the mounting sleeve. The output shaft of the servo motor extends out of the mounting sleeve, and a gear B is arranged on the output shaft of the servo motor.

[0012] The middle part of the transmission shaft is connected to the chassis through a shaft sleeve A, and one end of the transmission shaft is provided with a gear C meshing with gear B, and the other end is provided with a gear D;

[0013] The support frame is fixedly connected to the end of the support sleeve away from the chassis, and a gear shaft is rotatably provided in the support frame, one end of the gear shaft is provided with a gear E, and gear E is engaged with gear D, and the other end of the gear shaft is provided with a gear F; a bar box introduction rack and a bar box push-out rack are slidably provided in the support frame, and the bar box introduction rack is engaged with gear F, and the bar box push-out rack is engaged with gear D; a positioning block is provided at one end of the bar box introduction rack, and a push plate is provided on the end of the bar box push-out rack away from the positioning block.

[0014] The upper folding mechanism includes a rectangular frame A, a lifting frame A and a driving assembly. The rectangular frame A is arranged on the chassis. The lifting frame A is slidably connected to the rectangular frame A, and a folding plate A is provided at the bottom of the lifting frame A. The driving assembly is arranged on the chassis or the rectangular frame A and connected to the lifting frame A.

[0015] The driving component is a linear module.

[0016] The lower folding mechanism includes a transmission assembly and a lower folding assembly. The transmission assembly includes a torque input shaft and a crank arm. The torque input shaft is connected to the chassis through a shaft sleeve B, and a swing arm is fixedly provided at one end of the torque input shaft. The middle part of the crank arm is rotatably connected to the chassis, and one end is rotatably connected to the end of the swing arm away from the torque input shaft through a connecting rod, and the other end is rotatably connected to the rocker.

[0017] The lower folding assembly includes a rectangular frame B, a lifting frame B and a folding plate B. The rectangular frame B is arranged on the chassis. The lifting frame B is slidingly connected to the rectangular frame B, and the lifting frame B is rotatably connected to the end of the rocker away from the crank arm. The folding plate B is arranged on the top of the lifting frame B.

[0018] The lower folding mechanism is provided with a hot sealing component.

[0019] The hot sealing assembly includes a cylinder and a movable frame. The cylinder is arranged on the lifting frame B. The middle part of the movable frame is rotatably connected to the lifting frame B through a rotating shaft, and the upper part of the movable frame is connected to the lifting frame B through a compression spring. The lower end of the movable frame rests on the piston rod of the cylinder, and the upper end is provided with a hot sealing plate, and the hot sealing plate is located on the inner side of the installation cavity surrounded by the folding plate B and the lifting frame B.

[0020] The beneficial effects of the present invention are:

[0021] 1. First, the upper long side of the transparent paper is folded onto the right side of the strip box to be processed by the upper folding mechanism, and then the lower long side of the transparent paper is folded onto the upper long side by the lower folding mechanism. Then, the actuators of the upper folding mechanism and the lower folding mechanism are synchronously moved upward for a distance, so that the upper and lower long sides of the transparent paper are completely applied to the right side of the strip box to be processed. The right side of the strip box to be processed, the upper long side of the transparent paper, the lower long side of the transparent paper and the actuator of the lower folding mechanism are in contact with each other, which can effectively eliminate the gap and ensure that the transparent paper wrapped on the outer surface of the strip box is stretched and straight after hot sealing, avoiding wrinkles, and improving the hot sealing quality and appearance of the transparent paper on the strip box.

[0022] 2. The strip box to be processed is clamped by the positioning block in cooperation with the external force, and is introduced into the accommodating cavity. On the one hand, the depth of the strip box entering the accommodating cavity can be accurately controlled to achieve the purpose of positioning the strip box, and further the relative position of the right side of the strip box to be processed and the folding plates A and B remains unchanged, ultimately ensuring the folding effect of the folding plates A and B on the upper long sides and the lower long sides of the transparent paper; on the other hand, when the positioning block cooperates with the external force to clamp the strip box to be processed, the positioning block first presses the middle part of the transparent paper to fit it on the left side of the strip box to be processed, to prevent the transparent paper from sliding relative to the strip box to be processed, and to ensure that the transparent paper is in a stretched state and covers the left, upper, lower and right sides of the strip box to be processed.

[0023] 3. The strip boxes to be processed are introduced into the accommodating cavity on the forming wheel through the same pushing mechanism, and the strip boxes that have been hot-sealed on the forming wheel are pushed out of the forming wheel, thereby improving the structural compactness of the device.

[0024] 4. When the piston rod of the cylinder is repeatedly extended and retracted, the hot sealing plate repeatedly hits the overlapping part of the upper long side and the lower long side of the transparent paper to perform hot sealing and beautification, which effectively ensures the appearance quality of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the utility model;

[0026] Figure 2 for Figure 1 Schematic diagram of the structure after removing the rotary mechanism and pushing mechanism;

[0027] Figure 3 This is an assembly diagram of the rotary mechanism and the pusher mechanism of the utility model;

[0028] Figure 4 for Figure 3 Schematic diagram of the structure from another perspective;

[0029] Figure 5 This is a structural diagram of the pusher mechanism of the utility model;

[0030] Figure 6 This is a structural diagram of the upper folding mechanism of the present utility model;

[0031] Figure 7 for Figure 6 Schematic diagram of the structure from another perspective;

[0032] Figure 8 This is a schematic diagram of the assembly structure of the lower folding component and the hot sealing component of the utility model;

[0033] Figure 9 for Figure 8 Schematic diagram of the structure from another perspective;

[0034] Figure 10 This is a schematic diagram of the structure of the present invention to be processed.

[0035] In the figure: 1-chassis, 2-rotating mechanism, 20-forming wheel, 21-support sleeve, 22-accommodating chamber, 23-adsorption tube, 24-rotating sleeve, 25-gear A, 3-pushing mechanism, 300-mounting sleeve, 301-servo motor, 302-shaft sleeve A, 303-transmission shaft, 304-gear B, 305-gear C, 306-support frame, 307-gear D, 308-gear F, 309-strip box introduction rack, 310-positioning block, 311-strip box push-out rack, 312- Push plate, 4-upper folding mechanism, 40-rectangular frame A, 41-lifting frame A, 42-folding plate A, 5-lower folding mechanism, 50-transmission assembly, 501-torque input shaft, 502-swing arm, 503-connecting rod, 504-crank arm, 505-rocker, 51-lower folding assembly, 510-rectangular frame B, 511-lifting frame B, 512-folding plate B, 6-hot sealing assembly, 60-cylinder, 61-rotating shaft, 62-movable frame, 63-hot sealing plate, 64-compression spring, 7-transparent paper. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the described solution.

[0037] like Figures 1 to 10 As shown, the utility model of a box transparent paper folding device includes a chassis 1 and a rotating mechanism 2, an upper folding mechanism 4 and a lower folding mechanism 5 installed on the chassis 1. The upper folding mechanism 4 and the lower folding mechanism 5 are located on the same side of the rotating mechanism 2, and the upper folding mechanism 4 is located above the lower folding mechanism 5. Figure 10 As described, when in use, the upper long side of the transparent paper 7 is first folded onto the right side of the strip box to be processed by the upper folding mechanism 4, and then the lower long side of the transparent paper 7 is partially folded onto the upper long side by the lower folding mechanism 5. Then, the actuators of the upper folding mechanism 4 and the lower folding mechanism 5 are synchronously moved upward for a distance, so that the upper and lower long sides of the transparent paper 7 are completely applied to the right side of the strip box to be processed. The right side of the strip box to be processed, the upper long side of the transparent paper 7, the lower long side of the transparent paper 7 and the actuator of the lower folding mechanism 5 are in contact with each other, which can effectively eliminate the gap and ensure that the transparent paper 7 wrapped on the outer surface of the strip box after hot sealing is in a stretched and straight state, avoiding wrinkles, and improving the hot sealing quality and appearance of the transparent paper 7 of the strip box.

[0038] The rotary mechanism 2 includes a support sleeve 21, a rotating sleeve 24, and a forming wheel 20. The support sleeve 21 is fixedly mounted on the chassis 1. The rotating sleeve 24 is coaxially mounted within the support sleeve 21 and is rotatably connected to the support sleeve 21. A gear A25 is mounted on one end of the rotating sleeve 24. One end of the forming wheel 20 is fixedly connected to the end of the rotating sleeve 24 away from the gear A25. Four accommodating cavities 22 are evenly spaced on the circumferential surface of the forming wheel 20. During use, a servo motor A is mounted in the chassis 1. A gear G is mounted on the output shaft of the servo motor A. The gear G meshes with the gear A25. The servo motor A transmits torque to the forming wheel 20 through the gear G, the gear A25, and the rotating sleeve 24, driving the forming wheel 20 to rotate intermittently counterclockwise.

[0039] Each accommodating cavity 22 on the forming wheel 20 is circumferentially mounted with an adsorption tube 23, each with multiple vent holes. During operation, the adsorption tubes 23 are connected to a compressed air tank and a vacuum pump via pipes. The positive or negative pressure applied to the adsorption tubes 23 is controlled and switched by a valve.

[0040] The device further comprises a pushing mechanism 3 , part of which is located inside the forming wheel 20 and the other part of which extends into the chassis 1 .

[0041] The pushing mechanism 3 includes a mounting sleeve 300, a transmission shaft 303 and a support frame 306. The mounting sleeve 300 is installed in the chassis 1. A servo motor 301 is installed in the mounting sleeve 300. The output shaft of the servo motor 301 extends outside the mounting sleeve 300, and a gear B304 is installed on the output shaft of the servo motor 301.

[0042] The middle part of the transmission shaft 303 is connected to the chassis 1 through the shaft sleeve A302, and one end of the transmission shaft 303 is installed with a gear C305 that meshes with the gear B304, and the other end is installed with a gear D307;

[0043] The support frame 306 is fixedly connected to the end of the support sleeve 21 away from the chassis 1. A gear shaft is rotatably installed in the support frame 306. A gear E is installed at one end of the gear shaft, and the gear E is meshed with the gear D307. The other end of the gear shaft is installed with a gear F308. A bar box introduction rack 309 and a bar box push-out rack 311 are slidably installed in the support frame 306. The bar box introduction rack 309 is meshed with the gear F308, and the bar box push-out rack 311 is meshed with the gear D307. A positioning block 310 is installed at one end of the bar box introduction rack 309, and a push plate 312 is installed on the end of the bar box push-out rack 311 away from the positioning block 310. Figure 5 As shown, when the output shaft of the servo motor 301 rotates clockwise by a certain angle, the servo motor 301 transmits the torque to the gear D307 through the gear B304, the gear C305 and the transmission shaft 303, so that the gear D307 rotates counterclockwise, and the gear D307 drives the bar box to be pushed out of the rack 311 and gradually retracts it into the support frame 306 for reset; at the same time, the gear D307 transmits the torque to the gear F308 through the gear E and the gear shaft, so that the gear F308 rotates clockwise, and the gear F308 drives the bar box to be introduced into the rack 309 and gradually retracts it into the support frame 306 for reset, and the positioning block 310 cooperates with the external force to clamp the bar box to be processed and introduces the bar box to be processed into the accommodating chamber 22. The depth of the bar box entering the accommodating chamber 22 is positioned by the distance the positioning block 310 moves to the left, that is, it can be controlled by adjusting the clockwise rotation angle of the output shaft of the servo motor 301. It can be seen that the strip box to be processed is introduced into the accommodating cavity 22 by using the positioning block 310 in cooperation with the external force to clamp the strip box to be processed. On the one hand, the depth of the strip box entering the accommodating cavity 22 can be accurately controlled to achieve the purpose of positioning the strip box, and further the relative position of the right side of the strip box to be processed and the folding plate A42 and the folding plate B512 remains unchanged, ultimately ensuring the folding effect of the folding plate A42 and the folding plate B512 on the upper long side and the lower long side of the transparent paper 7; on the other hand, when the positioning block 310 cooperates with the external force to clamp the strip box to be processed, the positioning block 310 first presses the middle part of the transparent paper 7 to fit it on the left side of the strip box to be processed, to prevent the transparent paper 7 from sliding relative to the strip box to be processed, and to ensure that the transparent paper 7 is in a stretched state and wrapped around the left, upper, lower and right sides of the strip box to be processed.

[0044] Similarly, when the output shaft of the servo motor 301 rotates counterclockwise by a certain angle, the gear D307 rotates clockwise, and the gear D307 drives the strip box pushing rack 311 to gradually extend out of the support frame 306, so as to push the strip box in the accommodating cavity 22 located in a horizontal position and opening to the left out of the forming wheel 20 through the push plate 312 at the end of the strip box pushing rack 311; at the same time, the gear F308 rotates counterclockwise, and the gear F308 drives the strip box introducing rack 309 to gradually extend out of the support frame 306, so that the positioning block 310 extends to a position in contact with the transparent paper 7, waiting to cooperate with the external force again to introduce the next strip box to be processed into the accommodating cavity 22.

[0045] The upper folding mechanism 4 includes a rectangular frame A40, a lifting frame A41 and a driving assembly. The rectangular frame A40 is installed on the chassis 1. The lifting frame A41 is slidingly connected to the rectangular frame A40, and a folding plate A42 is installed at the bottom of the lifting frame A41. The driving assembly is installed on the chassis 1 or the rectangular frame A40 and connected to the lifting frame A41.

[0046] The driving assembly is a linear module (not shown in the figure). The linear module drives the lifting frame A41 and the folding plate A42 to move up and down. When the folding plate A42 moves down, the long side of the transparent paper 7 is folded, and when it moves up, it is reset.

[0047] The lower folding mechanism 5 includes a transmission assembly 50 and a lower folding assembly 51. The transmission assembly 50 includes a torque input shaft 501 and a crank arm 504. The torque input shaft 501 is connected to the chassis 1 through a shaft sleeve B, and a swing arm 502 is fixedly installed at one end of the torque input shaft 501. The middle part of the crank arm 504 is rotatably connected to the chassis 1, and one end is rotatably connected to the end of the swing arm 502 away from the torque input shaft 501 through a connecting rod 503. The other end is rotatably connected to a rocker 505.

[0048] The lower folding assembly 51 includes a rectangular frame B510, a lifting frame B511 and a folding plate B512. The rectangular frame B510 is mounted on the chassis 1. The lifting frame B511 is slidably connected to the rectangular frame B510 and is rotatably connected to the end of the rocker 505 away from the crank arm 504. The folding plate B512 is mounted on the top of the lifting frame B511. Figure 2 As shown, when in use, a servo motor B is installed in the chassis 1, and the output shaft of the servo motor B is connected to the torque input shaft 501 through a coupling. The servo motor B transmits the torque to the crank arm 504 through the coupling, the torque input shaft 501, the swing arm 502 and the connecting rod 503, so that the crank arm 504 swings back and forth around its rotation connection point with the chassis 1, and pushes and pulls the lifting frame B511 and the folding plate B512 up and down through the rocker 505 during the swinging process. When the folding plate B512 moves up, the lower long side of the transparent paper 7 is folded, and when it moves down, it is reset.

[0049] The lower folding mechanism 5 is provided with a hot sealing assembly 6 .

[0050] The hot sealing assembly 6 includes a cylinder 60 and a movable frame 62. The cylinder 60 is mounted on the lifting frame B511. The middle part of the movable frame 62 is rotatably connected to the lifting frame B511 via a rotating shaft 61, and the upper part of the movable frame 62 is connected to the lifting frame B511 via a compression spring 64. The lower end of the movable frame 62 rests on the piston rod of the cylinder 60, and the upper end is mounted with a hot sealing plate 63. The hot sealing plate 63 is located inside the mounting cavity enclosed by the folding plate B512 and the lifting frame B511. Figure 9 As shown, when the piston rod of the cylinder 60 is extended, the movable frame 62 is pushed to overcome the force of the compression spring 64 and rotate counterclockwise around the rotating shaft 61 by a certain angle, and the compression spring 64 is compressed, so that the hot-sealing plate 63 performs hot-sealing on the upper long side and the lower long side of the overlapping transparent paper 7; when the piston rod of the cylinder 60 is retracted, the compression spring 64 recovers its deformation and stretches, pushing the movable frame 62 to rotate clockwise around the rotating shaft 61 by a certain angle, so that the hot-sealing plate 63 retreats into the installation cavity and separates from the transparent paper 7; similarly, when the piston rod of the cylinder 60 is repeatedly extended and retracted, the hot-sealing plate 63 repeatedly hits the overlapping part of the upper long side and the lower long side of the transparent paper 7 to perform hot-sealing and beautify, effectively ensuring the appearance quality of the box.

[0051] A device for folding transparent paper strips, comprising the following steps:

[0052] A. Negative pressure is applied to the adsorption tubes 23 on both sides of a certain accommodating cavity 22 on the forming wheel 20 to absorb a section of transparent paper 7 delivered by the upper computer. The forming wheel 20 then rotates counterclockwise. When the accommodating cavity 22 covered by the transparent paper 7 rotates to a horizontal position with the opening facing right, the forming wheel 20 stops rotating. The transparent paper 7 is cut into the required length by the upper computer. The upper computer can use the device provided by the patent application number CN202322332870.6 filed by the applicant on August 29, 2023, entitled "A Transparent Paper Transport and Cutting Device."

[0053] B. The pusher mechanism 3 operates, contacting the transparent paper 7 while simultaneously pushing the strip box in the horizontal, left-facing accommodating cavity 22 out of the forming wheel 20. When an external force pushes the strip box to be processed into contact with the transparent paper 7 and the pusher mechanism 3 clamps the strip box to be processed, positive pressure is applied to the suction tube 23 holding the transparent paper 7, separating the transparent paper 7 from the suction tube 23. The pusher mechanism 3 then, under the cooperation of the external force, introduces the strip box to be processed into the accommodating cavity 22 covered by the transparent paper 7. During this process, the transparent paper 7 wraps the strip box to be processed. During use, the external force pushing the strip box to be processed into the accommodating cavity 22 is provided by the linear module A, electric cylinder, or linear motor.

[0054] C. The folding plate A42 moves downward to fold the upper long side of the transparent paper 7 onto the right side of the strip box to be processed, and then the folding plate B512 moves upward to contact the folding plate A42, so that the lower long side of the transparent paper 7 is folded onto the upper long side. Next, the folding plate A42 moves upward and resets, and the folding plate B512 moves upward synchronously at the same speed as the folding plate A42 until the hot sealing plate 63 moves to the middle position of the strip box to be processed and stops moving upward.

[0055] D. The cylinder 60 repeatedly pushes out and retracts the piston rod, driving the hot sealing plate 63 to repeatedly hit the right side of the strip box to be processed, completing the hot sealing work of the upper long side and the lower long side of the strip box to be processed.

[0056] E. The forming wheel 20 rotates counterclockwise for one station and repeats steps A to D to complete the hot sealing work of the remaining strip boxes to be processed one by one.

Claims

1. A device for folding transparent paper strips, characterized by: The invention comprises a chassis (1), a rotating mechanism (2), an upper folding mechanism (4) and a lower folding mechanism (5) arranged on the chassis (1); the upper folding mechanism (4) and the lower folding mechanism (5) are located on the same side of the rotating mechanism (2), and the upper folding mechanism (4) is located above the lower folding mechanism (5).

2. The transparent paper folding device for a box as claimed in claim 1, characterized in that: The rotary mechanism (2) comprises a support sleeve (21), a rotating sleeve (24) and a forming wheel (20), wherein the support sleeve (21) is fixedly arranged on the chassis (1), the rotating sleeve (24) is coaxially arranged in the support sleeve (21) and is rotatably connected to the support sleeve (21), one end of the rotating sleeve (24) is provided with a gear A (25), one end of the forming wheel (20) is fixedly connected to an end of the rotating sleeve (24) away from the gear A (25), and an even number of accommodating cavities (22) are evenly spaced on the circumferential surface of the forming wheel (20); An adsorption tube (23) is provided on each circumferential side of each accommodating cavity (22) on the forming wheel (20), and a plurality of vent holes are provided on the adsorption tube (23).

3. The transparent paper folding device for a box as claimed in claim 2, characterized in that: The device further comprises a pushing mechanism (3), part of which is located inside the forming wheel (20) and the other part of which extends into the chassis (1).

4. The transparent paper folding device for a box as claimed in claim 3, characterized in that: The pushing mechanism (3) comprises a mounting sleeve (300), a transmission shaft (303) and a support frame (306); the mounting sleeve (300) is arranged in the chassis (1); a servo motor (301) is arranged in the mounting sleeve (300); an output shaft of the servo motor (301) extends outside the mounting sleeve (300); and a gear B (304) is arranged on the output shaft of the servo motor (301); The middle portion of the transmission shaft (303) is connected to the chassis (1) via a shaft sleeve A (302), and one end of the transmission shaft (303) is provided with a gear C (305) meshing with a gear B (304), and the other end is provided with a gear D (307); The support frame (306) is fixedly connected to one end of the support sleeve (21) away from the chassis (1); a gear shaft is rotatably provided in the support frame (306); a gear E is provided at one end of the gear shaft, and the gear E is meshed with the gear D (307); a gear F (308) is provided at the other end of the gear shaft; a bar box introduction rack (309) and a bar box push-out rack (311) are slidably provided in the support frame (306); the bar box introduction rack (309) is meshed with the gear F (308), and the bar box push-out rack (311) is meshed with the gear D (307); One end of the strip box introduction rack (309) is provided with a positioning block (310), and one end of the strip box pushing rack (311) away from the positioning block (310) is provided with a push plate (312).

5. The transparent paper folding device for a box as claimed in claim 1, characterized in that: The upper folding mechanism (4) comprises a rectangular frame A (40), a lifting frame A (41) and a driving assembly. The rectangular frame A (40) is arranged on the chassis (1). The lifting frame A (41) is slidably connected to the rectangular frame A (40). A folding plate A (42) is provided at the bottom of the lifting frame A (41). The driving assembly is arranged on the chassis (1) or the rectangular frame A (40) and is connected to the lifting frame A (41).

6. The transparent paper folding device for a box as claimed in claim 5, characterized in that: The driving component is a linear module.

7. The transparent paper folding device for a box as claimed in claim 1, characterized in that: The lower folding mechanism (5) comprises a transmission assembly (50) and a lower folding assembly (51), wherein the transmission assembly (50) comprises a torque input shaft (501) and a crank arm (504), wherein the torque input shaft (501) is connected to the chassis (1) via a shaft sleeve B, and a swing arm (502) is fixedly provided at one end of the torque input shaft (501), a middle portion of the crank arm (504) is rotatably connected to the chassis (1), one end of the crank arm is rotatably connected to an end of the swing arm (502) away from the torque input shaft (501) via a connecting rod (503), and the other end is rotatably connected to a rocker (505); The lower folding assembly (51) includes a rectangular frame B (510), a lifting frame B (511) and a folding plate B (512). The rectangular frame B (510) is arranged on the chassis (1). The lifting frame B (511) is slidably connected to the rectangular frame B (510). The lifting frame B (511) is rotatably connected to an end of the rocker (505) away from the crank arm (504). The folding plate B (512) is arranged on the top of the lifting frame B (511).

8. The transparent paper folding device for a box as claimed in claim 7, characterized in that: The lower folding mechanism (5) is provided with a hot sealing component (6).

9. The transparent paper folding device for a box as claimed in claim 8, characterized in that: The hot sealing assembly (6) comprises a cylinder (60) and a movable frame (62). The cylinder (60) is arranged on the lifting frame B (511). The middle part of the movable frame (62) is rotatably connected to the lifting frame B (511) through a rotating shaft (61), and the upper part of the movable frame (62) is connected to the lifting frame B (511) through a compression spring (64). The lower end of the movable frame (62) abuts against the piston rod of the cylinder (60), and the upper end is provided with a hot sealing plate (63), and the hot sealing plate (63) is located inside the installation cavity surrounded by the folding plate B (512) and the lifting frame B (511).

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