Tissue folding machine

Abstract

The invention discloses a tissue folding machine which comprises a rack. A traction roller used for paper feeding, an upper knife roller used for pressing paper towels, a folding roller assembly used for folding the paper towels, a shifting fork assembly used for shifting the paper towels down from the folding roller assembly, a paper dividing module used for dividing the paper towels and a channel belt used for conveying the paper towels are sequentially installed on the machine frame from top to bottom. An upper knife used for pressing tissues and a bottom knife roll matched with the upper knife used for pressing the tissues are fixed to the upper knife roll, the tissues are conveyed to the center of the rack through the upper knife roll and the bottom knife roll, and then primary folding is completed through the two folding roll assemblies. V-shaped grooves are formed in the side faces of the two folding rollers at intervals and matched with the lower blade, so that the tissues are smoothly pressed into the V-shaped grooves, and primary folding is completed. Then, through cooperation of the shifting fork assembly and the swinging mechanism, the tissue is shifted off from the folding rollers and adsorbed to the folding roller on the other side, and symmetrical folding on the two sides is achieved.

Description

Technical Field

[0001] The present invention relates to the field of paper processing, and more particularly to a paper towel folding machine. Background Art

[0002] With the development of society and the improvement of people's living standards, paper towels have become an essential daily necessity in our daily lives. However, traditional paper towel folding methods often require manual operation, which is time-consuming and laborious, and there are also a large number of waste problems during the use of paper towels. This not only causes a huge waste of resources but also brings great pressure to the environment.

[0003] To solve these problems, researchers in our country have been looking for more efficient and accurate paper towel folding methods. Currently, although some automatic paper towel folding machines on the market can achieve partial automation, they still require manual intervention, such as adjusting the folding angle and controlling the position of the paper towel. The common problem with these machines is that due to the lack of intelligent design, their accuracy and efficiency in actual applications still need to be improved. Therefore, a paper towel folding machine is proposed. Summary of the Invention

[0004] The present invention aims to provide a technical solution to overcome the above deficiencies.

[0005] A paper towel folding machine includes a frame. The frame is successively installed with a traction roller for feeding paper from top to bottom, an upper knife roller for pressing the paper towel, a folding roller assembly for folding the paper towel, a fork assembly for removing the paper towel from the folding roller assembly, a paper separating module for separating the paper towel, and a channel belt for conveying the paper towel. Among them, the upper knife roller is fixed with an upper knife for pressing the paper towel and a bottom knife roller that cooperates with it to press the paper towel. The paper separating module includes a first lifting frame and a second lifting frame, and the first lifting frame and the second lifting frame are respectively movably arranged on both sides inside the frame. The first lifting frame is provided with a first moving frame that moves up and down in the same direction as it, and the first moving frame translates on the first lifting frame. Moreover, the first moving frame is provided with a first paper fork that translates in the same direction as it, and the first paper fork moves horizontally at a horizontal position perpendicular to the conveying direction of the channel belt. The second lifting frame is provided with a second moving frame that moves up and down in the same direction as it, and the second moving frame translates on the second lifting frame. Moreover, the second moving frame is provided with a second paper fork that translates in the same direction as it, and the second paper fork moves horizontally at a horizontal position perpendicular to the conveying direction of the channel belt.

[0006] Preferably, the folding roller assembly includes folding rollers rotatably installed on the frame. There are at least two folding rollers, and a negative pressure chamber is provided inside the folding rollers. The negative pressure chamber is externally connected to a negative pressure pump for generating negative pressure. The folding rollers are symmetrically installed on both sides of the frame. The paper towels are fed into the frame through the traction rollers, compacted by the upper knife roller and the bottom knife roller, and then pass between the two folding rollers. V-grooves arranged at intervals and lower blades are provided on the sides of the two folding rollers, and the V-grooves cooperate with the lower blades.

[0007] Preferably, the fork assembly includes a third paper fork for picking the paper towels off the folding rollers and a swing mechanism installed on the frame for driving the third paper fork to swing back and forth.

[0008] Preferably, the swing mechanism includes a fork deflection shaft for driving the third paper fork to swing and a fork eccentric bearing seat installed on the frame for driving the fork deflection shaft to drive the third paper fork to swing back and forth, and the fork deflection shaft is horizontally located between the fork eccentric bearings.

[0009] Preferably, the frame is further provided with an overlapping roller in transmission cooperation with the traction roller and an overlapping rubber roller arranged inside it and in transmission cooperation with the overlapping roller, and the overlapping roller and the overlapping rubber roller are parallel to each other.

[0010] Preferably, a shuttle bar frame is further arranged inside the frame between the overlapping roller and the overlapping rubber roller, and a number of shuttle bars are vertically arranged on both sides of the shuttle bar frame, and a number of shuttle bars are vertically located on the sides of the overlapping roller and the overlapping rubber roller.

[0011] Preferably, a transition gear for synchronously driving the overlapping roller and the folding roller is arranged outside the frame, and the overlapping roller and the folding roller are respectively meshed and driven with the transition gear, and a motor for driving the folding roller to rotate is further arranged outside the frame.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The paper towels are conveyed to the center of the frame by the paper feeding roller assembly, and then the initial folding is completed by two folding roller assemblies. V-grooves arranged at intervals are provided on the sides of these two folding rollers, which cooperate with the lower blades, enabling the paper towels to be smoothly pressed into the V-grooves and the initial folding to be completed. Then, through the cooperation of the fork assembly and the swing mechanism, the paper towels are picked off the folding rollers and adsorbed onto the folding rollers on the other side to achieve symmetrical folding on both sides. Finally, with the limiting mechanism of the knife shaft swing seat and the action of the upper blade and the lower blade, a crease is generated on the surface of the paper towels, facilitating the subsequent complete pressing of the paper towels into the V-grooves to achieve precise folding. The whole process is simple and efficient, effectively improving the utilization rate of the paper towels.

[0013] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 It is a schematic structural diagram of a paper towel folding machine;

[0016] Figure 2 It is another schematic structural diagram of the paper towel folding machine;

[0017] Figure 3 It is yet another schematic structural diagram of the paper towel folding machine;

[0018] Figure 4 It is a schematic structural diagram of the second lifting frame;

[0019] Figure 5 It is a schematic structural diagram of the first lifting frame;

[0020] Figure 6 It is another schematic structural diagram of the second lifting frame;

[0021] Figure 7 It is a schematic internal structure diagram of the paper towel folding machine.

[0022] As shown in the figure: 1. Frame, 2. Traction roller, 3. Overlapping rubber roller, 4. Shuttle bar, 5. Folding roller, 6. First lifting frame, 7. First moving frame, 8. First paper fork, 9. Conveyor belt, 10. Motor, 11. Intermediate gear, 12. Overlapping roller, 13. Upper knife roller, 14. Bottom knife roller, 15. Fork eccentric bearing seat, 16. Fork eccentric shaft, 17. Second lifting frame, 18. Second moving frame, 19. Second paper fork, 20. Third paper fork. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] Please refer to Figure 1-7, in the embodiment of the present invention, a paper towel folding machine includes a frame 1. The frame 1 is successively installed with a traction roller 2 for feeding paper, an upper knife roller 13 for pressing the paper towel, a folding roller assembly for folding the paper towel, a fork assembly for picking the paper towel off the folding roller assembly, a paper separating module for separating the paper towel, and a conveyor belt 9 for conveying the paper towel. Among them, the upper knife roller 12 is fixed with an upper knife for pressing the paper towel and a bottom knife roller 14 that cooperates with it to press the paper towel. The paper separating module includes a first lifting frame 6 and a second lifting frame 17. The first lifting frame 6 and the second lifting frame 17 are respectively movably arranged on both sides inside the frame 1. The first lifting frame 6 is provided with a first moving frame 7 that moves up and down in the same direction as it, and the first moving frame 7 translates on the first lifting frame 6. Moreover, the first moving frame 7 is provided with a first paper fork 8 that translates in the same direction as it, and the first paper fork 8 moves horizontally at a horizontal position perpendicular to the conveying direction of the conveyor belt 9. The second lifting frame 17 is provided with a second moving frame 18 that moves up and down in the same direction as it, and the second moving frame 18 translates on the second lifting frame 17. Moreover, the second moving frame 18 is provided with a second paper fork 19 that translates in the same direction as it, and the second paper fork 19 moves horizontally at a horizontal position perpendicular to the conveying direction of the conveyor belt 9;

[0025] At the beginning, the third paper fork 20 is at the lowest point, and the position of the first paper fork 8 is at the top and the first paper fork 8 moves to the position where the folded paper towel falls at the bottom of the folding roller assembly. The folded paper towel first falls on the first paper fork 8. As the number of folded paper towels increases, the first paper fork 8 and the paper towels stacked above it gradually descend synchronously until they descend to the set paper receiving position. After that, the third paper fork 20 moves upward and moves to the paper receiving position where the first paper fork 8 is located. The third paper fork 20 horizontally inserts under the paper towel and takes over the first paper fork 8. After the third paper fork 20 takes over the remaining paper towels, it synchronously and slowly descends to the conveyor belt 9 for conveying. At the same time, the first paper fork 8 is withdrawn and returns to the original height for standby and waits for the next paper towel;

[0026] When the last piece of paper towel is dropped by the folding roller assembly, the first paper fork 8 is inserted into the upper end of the paper towel to separate the paper, and the second paper fork 19 then moves upward and is inserted horizontally above the separated paper towel, and then is inserted and lowered together with the first paper fork 8; after the first paper fork 8 and the second paper fork 19 are lifted and lowered to separate the paper, they stand still and wait for the set number of paper towels, and then the first paper fork 8 and the second paper fork 19 are lifted and lowered to receive the paper and move downward slowly synchronously, and in the process of slowly moving downward, the first paper fork 8 slowly extends to the set distance, and the second paper fork 19 slowly withdraws from the origin position, during this process, the operating action steps between the first paper fork 8 and the second paper fork 19 are synchronized, and the two are in a front-and-back alternating action relationship, and then the first paper fork 8 and the second paper fork 19 rise to the original standby height and wait for the next process and repeat the above-mentioned work process.

[0027] The folding roller assembly includes a folding roller 5 rotatably mounted with the frame 1, at least two folding rollers 5, and a negative pressure chamber is provided inside the folding roller 5, and the negative pressure chamber is externally connected to a negative pressure pump for generating negative pressure, and the folding rollers 5 are symmetrically mounted on both sides of the frame 1, and the paper towel is fed into the frame 1 through the traction roller 2 and passes between the two folding rollers 5 after being compacted by the upper knife roller 13 and the bottom knife roller 14, and the sides of the two folding rollers 5 are provided with spaced V-grooves and lower blades, and the V-grooves and the lower blades cooperate with each other, and when the lower blade of the folding roller 5 rotates to the rightmost end, the V-groove of the right folding roller 5 just rotates to the leftmost end accordingly, so that the lower blade is just inserted into the V-groove, thereby pressing the part of the paper towel into the V-groove of the folding roller 5, and the V-groove is connected to the negative pressure chamber, so that the paper towel is attached to the surface of the folding roller 5 under the action of negative pressure.

[0028] The fork assembly includes a third fork paper fork 20 for pulling the paper towel off the folding roller 5 and a swing mechanism installed on the frame 1 for driving the third fork paper fork 20 to swing back and forth. When the adsorbed paper towel reaches the position of the third fork paper fork 20, the paper towel falls off the surface of the folding roller 5 under the movement of the third fork paper fork 20. When the paper towel falls off, because the two folding rollers 5 continue to rotate inward, the positions of the lower blade and the V-groove are exchanged when the second lower blade is released, so that the paper towel begins to be adsorbed on the folding roller 5 on the other side, and then is pulled down by the third fork paper fork 20 on the other side, so that the automatic folding of the paper towel is realized. In addition, when the folding roller 5 rotates, the lower blade and the upper knife come into periodic contact. When in contact, a crease will be generated on the surface of the paper towel under the action of the upper knife and the lower blade. In this way, it is convenient for the lower blade behind to press the paper towel from the crease into the V-groove, resulting in a good folding effect.

[0029] The swing mechanism includes a fork offset shaft 16 that drives the third fork paper fork 20 to swing, and a fork eccentric bearing seat 15 installed on the frame 1 for driving the fork offset shaft 16 to drive the third fork paper fork 20 to swing reciprocally. The fork offset shaft 16 is horizontally located between the fork eccentric bearings 15, and when the fork offset shaft 16 rotates forward and backward between the fork eccentric bearing seats 15, it drives the third fork paper fork 20 to swing. There are various means to achieve the forward and reverse rotation of the shaft in the prior art, which will not be elaborated here.

[0030] The frame 1 is further provided with an overlapping roller 12 that is in transmission cooperation with the traction roller 2, and an overlapping rubber roller 3 installed inside it and in transmission cooperation with the overlapping roller 12. The overlapping roller 12 and the overlapping rubber roller 3 are parallel to each other. Thus, the paper towel drawn by the traction roller 2 passes through between the overlapping roller 12 and the overlapping rubber roller 3, and through the fitting transmission between the overlapping roller 12 and the overlapping rubber roller 3, the paper towel is drawn to the folding roller 5. During the stretching process of the paper towel, through the cooperation between the overlapping roller 12 and the overlapping rubber roller 3, the movement of fibers is controlled, the early speed change of floating fibers is reduced, and the generation of thick and thin details and hairiness on the surface of the paper towel is reduced.

[0031] A shuttle bar frame is installed inside the frame 1 between the overlapping roller 12 and the overlapping rubber roller 3. A number of shuttle bars 4 are vertically arranged on both sides of the shuttle bar frame. All the shuttle bars 4 are vertically located on the sides of the overlapping roller 12 and the overlapping rubber roller 3. Thus, the paper towel stretched between the overlapping roller 12 and the overlapping rubber roller 3 passes through the shuttle bar frame, and the paper towel is stretched and flattened by the several shuttle bars 4 on both sides of it, and is flattened and stretched to the folding roller 5.

[0032] An intermediate gear 11 for synchronously driving the overlapping roller 12 and the folding roller 5 is arranged outside the frame 1. The overlapping roller 12 and the folding roller 5 are respectively meshed and driven with the intermediate gear 11. An electric motor 10 for driving the folding roller 5 to rotate is also arranged outside the frame 1. Thus, when the electric motor 10 drives the folding roller 5 to rotate, it synchronously drives the overlapping roller 12 to rotate through the intermediate gear 11.

[0033] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A paper towel folding machine, comprising a frame, characterized in that, The frame is successively installed with a traction roller for paper feeding, an upper knife roller for pressing the paper towel, a folding roller assembly for folding the paper towel, a fork assembly for picking the paper towel off the folding roller assembly, a paper separating module for separating the paper towel, and a channel belt for conveying the paper towel from top to bottom. Among them, the upper knife roller is fixed with an upper knife for pressing the paper towel and a bottom knife roller that cooperates with it to press the paper towel. The paper separating module includes a first lifting frame and a second lifting frame, and the first lifting frame and the second lifting frame are respectively movably arranged on both sides inside the frame. The first lifting frame is provided with a first moving frame that moves up and down in the same direction as it, and the first moving frame translates on the first lifting frame. Moreover, the first moving frame is provided with a first paper fork that translates in the same direction as it, and the first paper fork moves horizontally in a horizontal position perpendicular to the conveying direction of the channel belt. The second lifting frame is provided with a second moving frame that moves up and down in the same direction as it, and the second moving frame translates on the second lifting frame. Moreover, the second moving frame is provided with a second paper fork that translates in the same direction as it, and the second paper fork moves horizontally in a horizontal position perpendicular to the conveying direction of the channel belt.

2. The paper towel folding machine according to claim 1, characterized in that, The folding roller assembly includes folding rollers rotatably installed on the frame. There are at least two folding rollers, and a negative pressure chamber is provided inside the folding rollers. The negative pressure chamber is externally connected to a negative pressure pump for generating negative pressure. The folding rollers are symmetrically installed on both sides of the frame. The paper towel is fed into the frame through the traction roller, compacted by the upper knife roller and the bottom knife roller, and then passes between the two folding rollers. V-grooves are arranged at intervals on the sides of the two folding rollers, and lower blades are provided. The V-grooves cooperate with the lower blades.

3. The paper towel folding machine according to claim 1, characterized in that, The fork assembly includes a third paper fork for picking the paper towel off the folding roller and a swing mechanism installed on the frame for driving the third paper fork to swing reciprocally.

4. The paper towel folding machine according to claim 3, wherein, The swing mechanism includes a fork deflection shaft for driving the third paper fork to swing and a fork eccentric bearing seat installed on the frame for driving the fork deflection shaft to drive the third paper fork to swing reciprocally. And the fork deflection shaft is horizontally located between the fork eccentric bearings.

5. The paper towel folding machine according to claim 1, characterized in that, The frame is further provided with an overlapping roller in transmission cooperation with the traction roller and an overlapping rubber roller installed inside it and in transmission cooperation with the overlapping roller, and the overlapping roller and the overlapping rubber roller are parallel to each other.

6. The paper towel folding machine according to claim 5, wherein, A shuttle bar frame is further arranged between the overlapping roller and the overlapping rubber roller inside the frame. A number of shuttle bars are vertically arranged on both sides of the shuttle bar frame, and all the shuttle bars are vertically located on the sides of the overlapping roller and the overlapping rubber roller.

7. The paper towel folding machine according to claim 5, characterized in that, A transition gear for synchronously driving the overlapping roller and the folding roller is arranged outside the frame. The overlapping roller and the folding roller are respectively meshed and driven with the transition gear, and a motor for driving the folding roller to rotate is also arranged outside the frame.

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