Automatic bottom paper feeding device for paper cup machine

Abstract

This utility model relates to an automatic bottom paper feeding device for paper cup machines, which solves the problems of traditional processes through the synergy of mechanical limiting and pneumatic separation. The device includes a bottom paper feeding board, a limiting plate, and a sliding gap. A single sheet of bottom paper falls naturally into the strip feeding trough through the gap. The feeding hook is driven by a servo motor to push the paper back and forth along the slide rail, achieving high positioning accuracy. The limiting rod and the suction cup work together to complete efficient single-sheet separation. The limiting flange ring constrains the stacked paper to be vertically aligned. After the suction cup picks up the bottom paper, it is forcibly separated by a lifting mechanism. The U-shaped adjustment groove supports stepless adjustment of the spacing between the limiting rods. Pre-cut round bottom paper is directly fed to avoid waste generation and meets environmental protection regulations. The cam linkage system controls the suction cup and the push rod to move in strict synchronization.

Description

Technical Field

[0001] This utility model specifically relates to an automatic bottom paper feeding device for paper cup machines. Background Technology

[0002] A paper cup machine is a device used for the automated production of disposable paper cups. It processes paper into finished products through steps such as feeding, forming, and bonding. The "mechanism for transporting the bottom paper" is an essential structure of an automatic paper cup machine, used to accurately deliver pre-cut circular bottom paper to the bonding station at the bottom of the cup. However, existing bottom paper transport mechanisms have the following technical problems: First, during high-speed production, existing mechanisms suffer from high rates of adhesion due to electrostatic interference, differences in paper weight, and changes in ambient temperature and humidity, making it difficult to separate individual bottom papers. Second, the waste paper scraps generated during the cutting process require additional processing, resulting in high waste disposal fees in areas with stringent environmental regulations. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an automatic bottom paper feeding device for paper cup machines, which addresses the shortcomings of the prior art. Through the coordinated design of the paper limiting rod, the paper limiting flange ring and the suction cup lifting mechanism, the device achieves efficient single-sheet separation of the bottom paper. At the same time, by directly using pre-cut bottom paper, the generation of waste is completely eliminated, thus meeting the requirements of environmental protection regulations.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatic bottom paper feeding device for a paper cup machine, characterized in that: it includes a bottom paper feeding board and a bottom paper limiting plate distributed below the bottom paper feeding board; a bottom paper sliding gap capable of accommodating at least one bottom paper is provided between the bottom paper feeding board and the bottom paper limiting plate; a bottom paper feeding hole for storing bottom paper is passed through one end of the bottom paper feeding board; a strip-shaped paper feeding groove with a width smaller than the outer diameter of a single bottom paper is provided on the bottom paper limiting plate; one end of the strip-shaped paper feeding groove corresponds to the bottom paper feeding hole; at least one set of paper feeding hooks is provided in the strip-shaped paper feeding groove; and the paper feeding hooks are linked to a paper hook moving mechanism for driving the paper feeding hooks to reciprocate along the strip-shaped paper feeding groove.

[0005] This application can be further configured as follows: a number of sets of spaced paper limiting rods are inserted into the bottom paper feeding hole, the lower end of the paper limiting rod is connected to a paper limiting flange ring, the outer diameter of the limiting flange ring is larger than the outer diameter of the paper limiting rod, a suction cup for adsorbing the bottom bottom paper is provided below the bottom paper feeding hole, and the suction cup is linked to a first lifting drive mechanism for driving the suction cup to reciprocate vertically.

[0006] This application can be further configured as follows: the inner wall of the bottom paper feeding hole is provided with a number of U-shaped adjustment grooves arranged at intervals, the opening of the U-shaped adjustment groove faces the inner side of the bottom paper feeding hole, a paper rod clamping block is provided above the U-shaped adjustment groove, one end of the paper rod clamping block is fixedly connected to the paper limiting rod, and the other end is provided with a first strip hole, and a set of positioning holes is provided on the bottom paper feeding board corresponding to each set of first strip holes, and a fastener is connected between the first strip hole and the positioning hole.

[0007] This application can be further configured as follows: the paper hook moving mechanism includes a hook cup lower plate and a hook cup connecting rod hinged to the hook cup lower plate. A hook cup swing arm is hinged to the end of the hook cup connecting rod away from the hook cup lower plate, and a servo motor is linked to the end of the hook cup swing arm away from the hook cup connecting rod. A U-shaped clearance groove is provided in the middle of the hook cup lower plate, and two sets of hook cup columns symmetrically arranged on both sides of the U-shaped clearance groove are connected to the hook cup lower plate. Each set of hook cup columns is linked to a set of paper feeding hooks. A paper hook slider is also connected below the hook cup lower plate. The paper hook slider is slidably engaged with a paper hook slide rail, and the paper hook slide rail is arranged in a direction parallel to the strip-shaped paper feeding groove.

[0008] This application can be further configured as follows: the other end of the bottom paper feeding plate is provided with a bottom paper adhesive hole, the bottom paper limiting plate is provided with a bottom paper positioning hole corresponding to the bottom paper adhesive hole, the bottom paper positioning hole is connected to the strip paper feeding groove, and the inner diameter of the bottom paper positioning hole is smaller than the outer diameter of a single bottom paper, a top rod head is provided below the bottom paper positioning hole, and the top rod head is linked to a second lifting drive mechanism for driving the top rod head to move vertically reciprocating.

[0009] This application can be further configured as follows: the first lifting mechanism includes a pneumatic rod linked to the suction cup and a pneumatic rod seat fixedly connected to the lower end of the pneumatic rod. The pneumatic rod seat is linked to a paper suction guide rod. A paper suction connecting rod is hinged to the end of the paper suction guide rod away from the pneumatic rod seat. A paper suction swing arm is hinged to the end of the paper suction connecting rod away from the pneumatic rod seat. A paper suction cam is linked to the paper suction swing arm. The second lifting drive mechanism includes a paper-lifting cam that rotates coaxially with the paper suction cam and a paper-lifting swing arm linked to the paper-lifting cam. A paper-lifting connecting rod is hinged to the paper-lifting swing arm. A paper-lifting connecting plate is hinged to the end of the paper-lifting connecting rod away from the paper-lifting swing arm. A top rod is fixedly connected to the top rod, and the head of the top rod is fixed above the top rod.

[0010] The beneficial effects of this utility model are: (i) Through the coordinated design of the paper limiting rod, the paper limiting flange ring, and the suction cup lifting mechanism, efficient single-sheet separation of the bottom paper is achieved. The paper limiting rod is vertically inserted into the stack of bottom papers. The outer diameter of the paper limiting flange ring is larger than the rod body, forming a bottom stop to prevent the last bottom paper from falling off due to vibration or inertia, ensuring that the stack is vertically aligned. The suction cup adsorbs the bottom single bottom paper through the first lifting drive mechanism, using negative pressure adsorption to overcome the static friction between the bottom papers, forcibly separating the single bottom paper and avoiding paper jams or paper feeding failures caused by multiple sheets sticking together.

[0011] (ii) Through the U-shaped adjustment groove and adjustable paper limiting rod structure, the equipment can quickly adapt to different specifications of bottom paper. The U-shaped adjustment groove allows the paper limiting rod to slide laterally, and is fixed by bolts through the first strip hole and the positioning hole, so as to realize the adjustment of the spacing of the paper limiting rod and adapt to different specifications and types of bottom paper.

[0012] (III) The paper feeding hook and servo motor linkage system ensures the precise pushing of the bottom paper along the preset trajectory. The servo motor drives the hook cup swing arm to swing, and the rotational motion is converted into the linear reciprocating motion of the hook cup lower plate through the hinged hook cup connecting rod. With the guidance and constraint of the paper hook slide rail and the slider, the error of the paper feeding hook movement trajectory remains consistent. The hook cup columns symmetrically arranged on both sides of the U-shaped relief groove are linked with the two sets of paper feeding hooks to counteract the lateral torque and prevent the bottom paper from tilting during transportation.

[0013] (iv) The cam linkage mechanism and lifting drive system achieve strict synchronization and cycle optimization of the action. The suction cam and the top paper cam are rigidly connected on the same axis. The timing of suction cup adsorption and top rod head lifting is precisely controlled by the cam profile, resulting in small error in the action cycle.

[0014] (v) This application completely eliminates waste generation by directly using pre-cut backing paper, thus meeting environmental regulations. Directly purchasing pre-cut circular backing paper avoids background waste generated by cutting whole sheets of paper in traditional processes, reducing waste disposal costs.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the bottom paper limiting plate in an embodiment of this utility model; Figure 3 This is a schematic diagram of the structure of the bottom paper placement area in an embodiment of this utility model; Figure 4 This is a schematic diagram of the first lifting drive mechanism and the second lifting drive mechanism according to an embodiment of the present utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1 to 4The automatic bottom paper feeding device for the paper cup machine shown includes a bottom paper feeding board 1 and a bottom paper limiting plate 2 distributed below the bottom paper feeding board 1. A bottom paper sliding gap that can accommodate at least one bottom paper is provided between the bottom paper feeding board 1 and the bottom paper limiting plate 2. One end of the bottom paper feeding board 1 has a bottom paper feeding hole 3 for storing bottom paper. The bottom paper limiting plate 2 has a strip-shaped paper feeding groove 4 with a width smaller than the outer diameter of a single bottom paper. One end of the strip-shaped paper feeding groove 4 corresponds to the bottom paper feeding hole 3. At least one set of paper feeding hooks 6 is provided in the strip-shaped paper feeding groove 4. The paper feeding hooks 6 are linked to a paper hook moving mechanism for driving the paper feeding hooks 6 to reciprocate along the strip-shaped paper feeding groove 4. The sliding gap (height ≥ thickness of a single sheet of bottom paper) between the bottom paper placement plate 1 and the bottom paper limiting plate 2 forms a physical limit, allowing the bottommost sheet of bottom paper to be sucked by the suction cup 9 to the top of the strip feeding groove 4. The constraint design of the strip feeding groove 4, with a width smaller than the outer diameter of the bottom paper, allows the bottom paper to slide within the sliding gap without falling out of the bottom paper limiting plate 2. When the paper feeding hook 6 reciprocates along the strip feeding groove 4 under the drive of the paper hook moving mechanism, the hook body forms a mechanical engagement with the edge of the bottom paper. By rigidly pushing instead of traditional friction transmission, it ensures that the bottom paper moves accurately to the predetermined position along the preset trajectory, so as to facilitate the adhesion of the bottom paper to the paper tube. This mechanical forced guiding mechanism effectively solves the problems of multiple sheets sticking and positioning drift existing in traditional vacuum adsorption or friction wheel paper feeding. Combined with the dimensional coupling relationship between the gap, groove width, and hook body, it improves the success rate of bottom paper delivery.

[0019] Several sets of spaced-apart paper limiting rods 7 are inserted into the bottom paper feeding hole 3. The lower end of the paper limiting rod 7 is connected to a paper limiting flange ring 8. The outer diameter of the limiting flange ring is larger than the outer diameter of the paper limiting rod 7. Below the bottom paper feeding hole 3, there is a suction cup 9 for adsorbing the bottommost bottom paper. The suction cup 9 is linked to a first lifting drive mechanism for driving the suction cup 9 to reciprocate vertically. Several sets of paper limiting rods 7 together form a storage area for storing "piles of bottom paper". The paper limiting flange ring 8 stops the bottommost bottom paper to prevent it from falling off the bottommost bottom paper from the bottom paper feeding hole 3 due to vibration or inertia, ensuring that the stack is vertically aligned. After the first lifting drive mechanism drives the suction cup 9 to rise until it adsorbs the bottommost bottom paper, the first lifting drive mechanism drives it to move downward, separating the single sheet of bottom paper, avoiding paper jams or paper feeding failures caused by multiple sheets sticking together. At the same time, the single sheet of bottom paper is transported to the bottom paper limiting plate 2, and the paper feeding hook 6 transports the bottom paper to the predetermined position. Through the coordinated action of the paper limiting rod 7, the paper limiting flange ring 8, and the suction cup 9 lifting mechanism, efficient single-sheet separation and stable conveying of the bottom paper are achieved.

[0020] The inner wall of the bottom paper feeding hole 3 is provided with several sets of spaced U-shaped adjustment grooves 10. The openings of the U-shaped adjustment grooves 10 face the inside of the bottom paper feeding hole 3. A paper rod clamping block 11 is provided above the U-shaped adjustment groove 10. One end of the paper rod clamping block 11 is fixedly connected to the paper limiting rod 7, and the other end is provided with a first strip hole 12. The bottom paper feeding plate 1 is provided with a set of positioning holes corresponding to each set of first strip holes 12. Fasteners are connected between the first strip hole 12 and the positioning holes. The opening of the U-shaped adjustment groove 10 faces the inside of the bottom paper feeding hole 3, allowing the paper limiting rod 7 to slide laterally along the groove. It is fixed by fasteners (such as bolts) connected to the positioning holes through the first strip hole 12, realizing the adjustment of the spacing of the paper limiting rod 7, which can be adapted to bottom paper of different diameters. The paper rod clamping block 11 rigidly connects the paper limiting rod 7 to the bottom paper feeding plate 1. The adjustment gap is eliminated by the pre-tightening force of the bolts, avoiding the displacement of the paper limiting rod 7 caused by equipment vibration.

[0021] The paper hook moving mechanism includes a hook cup lower plate 13 and a hook cup connecting rod 14 hinged to the hook cup lower plate 13. A hook cup swing arm 16 is hinged to the end of the hook cup connecting rod 14 away from the hook cup lower plate 13. A servo motor 15 is linked to the end of the hook cup swing arm 16 away from the hook cup connecting rod 14. A U-shaped relief groove is provided in the middle of the hook cup lower plate 13, and two sets of hook cup columns 17 symmetrically arranged on both sides of the U-shaped relief groove are connected to the hook cup lower plate 13. Each set of hook cup columns 17 is linked to a set of paper feeding hooks 6. A paper hook slider 18 is also connected below the hook cup lower plate 13. The paper hook slider 18 is slidably engaged with a paper hook slide rail 19, which is arranged in a direction parallel to the strip paper feeding groove 4. Servo motor 15 drives hook cup swing arm 16 to swing, and the rotational motion is converted into linear motion of hook cup lower plate 13 through hinged hook cup connecting rod 14. With the guidance of paper hook slide rail 19 and paper hook slider 18, the paper feeding hook 6 keeps the movement trajectory of the strip paper feeding groove 4 consistent, improving the bottom paper feeding accuracy. Hook cup columns 17 symmetrically arranged on both sides of U-shaped relief groove are linked with two sets of paper feeding hooks 6 to counteract the lateral torque during the movement and prevent the bottom paper from tilting during transportation.

[0022] The other end of the bottom paper placement plate 1 is provided with a bottom paper bonding hole 20. The bottom paper limiting plate 2 is provided with a bottom paper positioning hole 21 corresponding to the bottom paper bonding hole 20. The bottom paper positioning hole 21 is connected to the strip paper feeding groove 4, and the inner diameter of the bottom paper positioning hole 21 is smaller than the outer diameter of a single bottom paper. A top rod head 22 is provided below the bottom paper positioning hole 21. The top rod head 22 is linked to a second lifting drive mechanism for driving the top rod head 22 to move vertically reciprocally. "The inner diameter of the bottom paper positioning hole 21 is smaller than the outer diameter of the bottom paper". After the bottom paper enters the positioning hole, its edge is limited to ensure that it remains horizontally aligned at the bonding station and avoids positional displacement due to vibration or airflow. The second lifting drive mechanism drives the top rod head 22 to vertically lift the bottom paper. The rigid top rod 5 applies uniform pressure to make the bottom paper fully contact the bottom of the cup and complete the bonding.

[0023] The first lifting mechanism includes a pneumatic rod 23 linked to the suction cup 9 and a pneumatic rod seat 24 fixedly connected to the lower end of the pneumatic rod 23. The pneumatic rod seat 24 is linked to a paper suction guide rod 25. The end of the paper suction guide rod 25 away from the pneumatic rod seat 24 is hinged to a paper suction connecting rod 26. The end of the paper suction connecting rod 26 away from the pneumatic rod seat 24 is hinged to a paper suction swing arm 27. The paper suction swing arm 27 is linked to a paper suction cam 28. The second lifting drive mechanism includes a paper-topping cam 29 coaxially rotating with the paper suction cam 28 and a paper-topping swing arm 30 linked to the paper-topping cam 29. The paper-topping swing arm 30 is hinged to a paper-topping connecting rod 31. The end of the paper-topping connecting rod 31 away from the paper-topping swing arm 30 is hinged to a paper-topping connecting plate 32. The paper-topping connecting plate 32 is fixedly connected to a top rod 5. The top rod head 22 is fixed above the top rod 5. The suction cam 28 and the top paper cam 29 are rigidly connected coaxially. The swing angles of the suction arm 27 and the top paper arm 30 are precisely controlled by the cam profile, ensuring a strict match between the timing of the suction cup 9's adsorption of the bottom paper and the lifting action of the top rod head 22. The suction guide rod 25 and the top paper connecting rod 31 decompose lateral forces through a hinge point, reducing the radial load on the linear motion components. The profile curve of the suction cam 28 is designed as a variable curvature structure, controlling the lifting speed of the suction cup 9 through the difference in the swing angle of the arms. During the adsorption phase, it makes smooth contact with the bottom paper at a low speed, and during the lifting phase, it resets at a high speed, balancing stability and efficiency.

[0024] The working principle of this embodiment is as follows: A stack of bottom paper is placed between several sets of paper-limiting rods 7 (i.e., within the bottom paper feeding holes 3), and the paper-limiting flange ring 8 stops the bottom paper at the bottom. The suction cup 9 rises to absorb the bottom bottom paper and transports a single sheet of bottom paper to the bottom paper limiting plate 2. The paper hook moving mechanism drives two sets of paper feeding hooks 6 to move, pushing the bottom paper until it reaches the bottom paper positioning hole 21. The second lifting mechanism drives the top rod head 22 to move upward, thereby pushing the bottom paper to adhere to the bottom of the paper tube.

[0025] This embodiment applies to bottom paper without waste edges, that is, bottom paper that has already been processed. In some areas, due to environmental protection requirements that limit the amount of paper, if bottom paper of a predetermined shape is directly cut from a large area of ​​paper, waste edges will inevitably be generated. These waste edges cannot be recycled by paper cup machine manufacturers and will generate waste costs. Therefore, it is necessary to use the automatic bottom paper feeding device provided in this embodiment. By directly purchasing the required bottom paper, no processing is required, thereby avoiding the generation of waste edge waste and solving the above problems.

Claims

1. An automatic bottom paper feeding device for a paper cup machine, characterized in that: The device includes a bottom paper placement board and a bottom paper limiting plate distributed below the bottom paper placement board. A bottom paper sliding gap capable of accommodating at least one bottom paper is provided between the bottom paper placement board and the bottom paper limiting plate. One end of the bottom paper placement board has a bottom paper feeding hole for storing bottom paper. The bottom paper limiting plate has a strip-shaped paper feeding groove with a width smaller than the outer diameter of a single bottom paper. One end of the strip-shaped paper feeding groove corresponds to the bottom paper feeding hole. At least one set of paper feeding hooks is provided in the strip-shaped paper feeding groove. The paper feeding hooks are linked to a paper hook moving mechanism for driving the paper feeding hooks to reciprocate along the strip-shaped paper feeding groove.

2. The automatic bottom paper feeding device for a paper cup machine according to claim 1, characterized in that: Several sets of spaced paper limiting rods are inserted into the bottom paper feeding hole. The lower end of the paper limiting rod is connected to a paper limiting flange ring. The outer diameter of the limiting flange ring is larger than the outer diameter of the paper limiting rod. A suction cup for adsorbing the bottom bottom paper is provided below the bottom paper feeding hole. The suction cup is linked to a first lifting drive mechanism for driving the suction cup to reciprocate vertically.

3. The automatic bottom paper feeding device for a paper cup machine according to claim 2, characterized in that: The inner wall of the bottom paper feeding hole is provided with several sets of U-shaped adjustment grooves arranged at intervals. The opening of the U-shaped adjustment groove faces the inside of the bottom paper feeding hole. A paper rod clamping block is provided above the U-shaped adjustment groove. One end of the paper rod clamping block is fixedly connected to the paper limiting rod, and the other end is provided with a first strip hole. The bottom paper feeding board is provided with a set of positioning holes corresponding to each set of first strip holes. Fasteners are connected between the first strip holes and the positioning holes.

4. The automatic bottom paper feeding device for a paper cup machine according to claim 1, characterized in that: The paper hook moving mechanism includes a hook cup lower plate and a hook cup connecting rod hinged to the hook cup lower plate. A hook cup swing arm is hinged to the end of the hook cup connecting rod away from the hook cup lower plate, and a servo motor is linked to the end of the hook cup swing arm away from the hook cup connecting rod. A U-shaped clearance groove is provided in the middle of the hook cup lower plate, and two sets of hook cup columns symmetrically arranged on both sides of the U-shaped clearance groove are connected to the hook cup lower plate. Each set of hook cup columns is linked to a set of paper feeding hooks. A paper hook slider is also connected below the hook cup lower plate. The paper hook slider is slidably engaged with a paper hook slide rail, and the paper hook slide rail is arranged in a direction parallel to the strip paper feeding groove.

5. The automatic bottom paper feeding device for a paper cup machine according to claim 2, characterized in that: The other end of the bottom paper feeding plate is provided with a bottom paper adhesive hole. The bottom paper limiting plate is provided with a bottom paper positioning hole corresponding to the bottom paper adhesive hole. The bottom paper positioning hole is connected to the strip paper feeding groove, and the inner diameter of the bottom paper positioning hole is smaller than the outer diameter of a single bottom paper. A top rod head is provided below the bottom paper positioning hole. The top rod head is linked to a second lifting drive mechanism for driving the top rod head to move vertically reciprocating.

6. The automatic bottom paper feeding device for a paper cup machine according to claim 5, characterized in that: The first lifting drive mechanism includes a pneumatic rod linked to the suction cup and a pneumatic rod seat fixedly connected to the lower end of the pneumatic rod. The pneumatic rod seat is linked to a paper suction guide rod. A paper suction connecting rod is hinged to the end of the paper suction guide rod away from the pneumatic rod seat. A paper suction swing arm is hinged to the end of the paper suction connecting rod away from the pneumatic rod seat. A paper suction cam is linked to the paper suction swing arm. The second lifting drive mechanism includes a paper-lifting cam that rotates coaxially with the paper suction cam and a paper-lifting swing arm linked to the paper-lifting cam. A paper-lifting connecting rod is hinged to the paper-lifting swing arm. A paper-lifting connecting plate is hinged to the end of the paper-lifting connecting rod away from the paper-lifting swing arm. A top rod is fixedly connected to the top rod, and the top rod head is fixed above the top rod.

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