Automatic handkerchief folding machine

Abstract

The present application relates to the field of web conveying device, especially to a handkerchief paper automatic folding machine, the structure of which comprises a transition roller group, a tension adjusting group and a deviation corrector, the deviation corrector comprises a deviation roller frame and a control base for driving the rotation of the deviation roller frame, the tension adjusting group comprises a fixed roller, a second movable roller, a main lifting mechanism and a micro-motion adjusting assembly, the main lifting mechanism is in transmission connection with the second movable roller, the second movable roller is lifted along a preset track through the main lifting mechanism, the micro-motion adjusting assembly comprises a first movable roller and a micro-motion driving device, the first movable roller is arranged on the sheet path of the second movable roller and is lifted synchronously with the second movable roller, the micro-motion driving device is in transmission connection with the first movable roller, the first movable roller is independently lifted in a short distance relative to the second movable roller through a micro-motion frame, so that the tension can be smoothly transitioned, and through the cooperation of the connecting shafts on both sides of the jacking rod and the return springs, the driver can separately drive the slider on the feeding side or the discharging side to move.

Description

Technical Field

[0001] This invention is an automatic handkerchief paper folding machine, belonging to the field of roll material conveying. Background Technology

[0002] The automatic handkerchief folding machine is the core equipment for automatically processing large rolls of raw paper into portable small handkerchiefs. It is widely used in the production of bagged or boxed handkerchiefs. The transition roller group is equipped with a tension adjustment mechanism and a correction device to control the tension of the paper web and correct its centering.

[0003] Existing tension adjustment mechanisms mostly use the overall lifting and lowering of a single movable roller to adjust the basic tension of the paper web. However, in actual operation, especially when the winding tension suddenly increases, the material running resistance increases, or during high-speed start-stop and roll changing, the paper web tension will fluctuate drastically. Relying solely on the overall lifting and lowering of a single movable roller results in slow adjustment response, low precision, and a tendency to over-adjust, causing the paper web to enter the guide with either excessive or insufficient tension.

[0004] When the longitudinal tension before entering the guide is too high, the guide's actuator motor and sensors will bear excessive lateral load, leading to delayed guide action, decreased accuracy, or even damage. Excessive local tension can also cause stretching deformation of the paper web, wavy edges, or wrinkling, affecting folding accuracy and the neatness of the finished product's end face. In addition, this overall adjustment method makes it difficult to isolate the high tension in the winding section from the low tension in the guide section, causing mutual interference between the tension control of the preceding and following process sections, resulting in poor stability at high speeds.

[0005] In response to the shortcomings of existing automatic handkerchief paper folding machines, such as slow response of the tension adjustment mechanism, easy overload damage to the guide device when tension fluctuates, paper web deformation and wrinkling, and insufficient stability during high-speed operation, this invention provides an automatic handkerchief paper folding machine that can quickly fine-tune the tension, achieve tension decoupling, effectively protect the guide device, and improve operational stability and folding accuracy. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an automatic handkerchief folding machine to solve the above problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic handkerchief paper folding machine, comprising: a feeding section, a transition roller group, a folding roller group, a slitting roller group, and a conveyor belt. The feeding section is installed at the front end of the transition roller group. The roll material passes through the transition roller group and then through the folding roller group. A slitting roller group is arranged adjacent to the folding roller group. The discharge end of the slitting roller group is connected to the conveyor belt. The transition roller group includes a tension adjustment group and a deviation corrector. The deviation corrector includes a deviation corrector roller frame and a control base for driving the deviation corrector roller frame to rotate. The tension adjustment group includes a fixed roller, a second movable roller, a main lifting mechanism, and a micro-motion adjustment component. The main lifting mechanism is drivenly connected to the second movable roller. The second movable roller rises and falls along a preset track via the main lifting mechanism. The micro-motion adjustment component includes a first movable roller and a micro-motion drive device. The first movable roller is arranged on the sheet path of the second movable roller and rises and falls synchronously with the second movable roller. The micro-motion drive device is drivenly connected to the first movable roller. The first movable roller rises and falls a short distance relative to the second movable roller via the micro-motion drive device.

[0008] Preferably, the main lifting mechanism includes a lifting device, a screw, and an adjusting sleeve. The lifting device is fixedly installed, and its output end is connected to the screw. The adjusting sleeve is threaded onto the screw, and the second movable roller is fixedly connected to the adjusting sleeve.

[0009] Preferably, the micro-motion adjustment assembly further includes a micro-motion frame, which is mounted on the adjustment screw sleeve, and the first movable roller is connected to the micro-motion frame via a positioning rod; the micro-motion drive device is disposed on the micro-motion frame and includes a driver, a push rod, and a sliding assembly, the sliding assembly is connected to the micro-motion frame, the driver is drivenly connected to the push rod, and the push rod cooperates with the sliding assembly.

[0010] Preferably, the micro-motion frame is provided with a slide and a middle block that cooperates with the slide, and sliders are provided on both sides of the middle block. The top rod has a rod body and connecting shafts provided on the left and right sides of the rod body. The driver is provided with a gear, which is connected to the rod body for transmission. The connecting shafts on both sides cooperate with the corresponding slides on the sides, and each side slide is connected to the corresponding slider. A return spring is provided at the corresponding position of one side connecting shaft.

[0011] Preferably, the rod body of the top rod is provided with a rack structure that meshes with the gear.

[0012] Preferably, the micro-motion frame has a built-in tension sensor.

[0013] Preferably, the bottom of the control base is provided with a lifting base, which is connected to the control base.

[0014] Preferably, the tension adjustment assembly further includes a support plate, the fixed roller is fixed on the support plate, the support plate is provided with a vertical slide rail and a slot through the support plate, and the sliding component of the second movable roller passes through the slot and is connected to the adjusting screw sleeve.

[0015] Preferably, connecting plates are fixed on both sides of the second movable roller, the adjusting screw sleeve is fixed between the two connecting plates, and the micro-motion frame is mounted on the adjusting screw sleeve and slides in cooperation with the connecting plates.

[0016] Preferably, the first movable roller is rotatably mounted on the micro-motion frame via the positioning rod, and the rotation axis of the first movable roller is the axis of the positioning rod.

[0017] This invention discloses an automatic handkerchief folding machine, which has the following advantages: When the paper tension suddenly increases, the micro-motion drive device in the micro-motion adjustment assembly can drive the first movable roller to quickly lift up to release pressure, reduce the excess longitudinal tension in front of the correction roller frame, and enable the control base to operate under low load, thereby improving the correction efficiency. The micro-motion frame drives the first movable roller to lift and lower independently relative to the second movable roller by a short distance, which allows for a smooth tension transition. By utilizing the cooperation of the connecting shafts on both sides of the top rod and the return spring, the driver can drive the slider on the feeding side or the discharge side to move independently, so that the first movable roller can lift and lower independently on one side, ensuring that the tension control of the front and rear process sections does not interfere with each other. Attached Figure Description

[0018] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of an automatic handkerchief paper folding machine according to the present invention.

[0019] Figure 2 for Figure 1 Schematic diagram of structure A in the middle.

[0020] Figure 3 This is a schematic diagram of the tension adjustment assembly of the present invention.

[0021] Figure 4 This is a rear view schematic diagram of the tension adjustment assembly of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the movable roller of the present invention.

[0023] Figure 6 This is a schematic diagram of the micro-motion frame of the present invention.

[0024] Figure 7 This is a cross-sectional view of the top rod of the present invention.

[0025] In the picture: 1. Feeding section; 2. Transition roller assembly; 3. Folding roller assembly; 4. Slitting roller assembly; 5. Conveyor belt; 121. Connecting plate; 122. Adjusting screw sleeve; 123. Fine adjustment frame; 124. Positioning rod; 125. First movable roller; 21. Tension adjustment assembly; 22. Correcting roller frame; 23. Control base; 24. Lifting base; 211. Fixed roller; 212. Second movable roller; 213. Slide rail; 214. Lifter; 215. Screw; 231. Slider; 232. Middle block; 233. Slide block; 234. Driver; 235. Push rod; 351. Rod body; 352. Connecting shaft; 353. Return spring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In existing folding machines, excessive longitudinal tension before the paper enters the web guiding device causes excessive lateral load on the guiding device's actuator motor and sensors, leading to delayed guiding action, decreased accuracy, or even damage. Excessive local tension can also cause stretching deformation of the paper web, resulting in wavy edges or wrinkles, affecting folding accuracy and the neatness of the finished product's end face. Furthermore, this overall adjustment method struggles to isolate the high tension in the winding section from the low tension in the guiding section, causing mutual interference between tension control in the preceding and following process sections, resulting in poor stability at high speeds. Therefore, to address these issues, this paper proposes the following technical solution: Please see Figures 1 to 7 This invention provides a technical solution for an automatic handkerchief folding machine: its structure includes a feeding section 1, a transition roller group 2, a folding roller group 3, a slitting roller group 4, and a conveyor belt 5. The feeding section 1 is installed at the front end of the transition roller group 2. The roll material passes through the transition roller group 2 and then through the folding roller group 3. The folding roller group 3 is adjacent to the folding roller group 3 and the slitting roller group 4 is connected to the discharge end of the slitting roller group 4 via the conveyor belt 5. The transition roller group 2 includes a tension adjustment group 21 and a deviation corrector. The deviation corrector includes a deviation corrector roller frame 22 and a control base 23 for driving the deviation corrector roller frame 22 to rotate. The tension adjustment group 21 includes a fixed roller 211, a second movable roller 212, a main lifting mechanism, and a micro-adjustment component. The main lifting mechanism is connected to the second movable roller 212, and the second movable roller 212 moves up and down along a preset track through the main lifting mechanism. The micro-motion adjustment assembly includes a first movable roller 125 and a micro-motion drive device. The first movable roller 125 is disposed on the sheet path of the second movable roller 212 and moves up and down synchronously with the second movable roller 212. The micro-motion drive device is connected to the first movable roller 125 in a transmission manner. The first movable roller 125 moves up and down a short distance relative to the second movable roller 212 through the micro-motion drive device.

[0029] The main structure of this device includes a feeding section 1, where the paper towel roll is placed and sorted by the transition roller group 2, then guided to the folding roller group 3 for processing, then cut by the slitting roller group 4, and finally output by the conveyor belt 5 to stack the paper towels.

[0030] The large roll of paper placed in the feeding section 1 is prone to excessive tension during the feeding process, causing the paper towel to be stretched. Excessive tension can cause the paper towel to spring back and wrinkle, and it can also cause positional displacement, thus affecting the folding accuracy.

[0031] Therefore, this device uses a transition roller assembly 2 for processing. The transition roller assembly 2 includes a tension adjustment assembly 21, which is used for guiding the transition of the tissue strip. After the tissue passes through the tension adjustment assembly 21, it is corrected by a correction device consisting of a correction roller frame 22 and a control base 23. Specifically, when the sheet passes through the correction roller frame 22, the control base 23 drives the correction roller frame 22 to rotate and deflect, in order to compensate for the angular deviation of the sheet during the movement.

[0032] The bottom of the control base 23 is provided with a lifting base 24. By pushing the lifting base 24, the control base 23 and the correction roller frame 22 move up and down, thereby adjusting the pressure during the correction process.

[0033] The tension adjustment assembly 21 is equipped with a fixed roller 211 and a second movable roller 212. A slide rail 213 is provided on the surface of the support plate on which the fixed roller 211 is mounted, allowing the second movable roller 212 to move. Slots are provided on both sides of the slide rail 213 that penetrate the surface of the support plate. The sliding component of the second movable roller 212 passes through the slots and is connected to a screw 215 driven by the bottom of the lifting device 214.

[0034] Specifically, the motor of the lifting device 214 drives the screw 215 to rotate. The external thread of the screw 215 cooperates with the thread structure of the second movable roller 212. The second movable roller 212 moves up and down through the thread transmission, thereby controlling the tension of the roll material: when the roll material is too loose, the second movable roller 212 moves downward; when the tension is too high, the second movable roller 212 moves upward.

[0035] However, when the tension changes significantly, simply moving the second movable roller 212 up and down by driving the screw 215 through the lifting device 214 can easily lead to excessive loosening of the roll material, causing it to deviate significantly when entering the surface of the correction roller frame 22. This application provides further optimization to address this issue. Specifically, the second movable roller 212 is fixed to the adjusting sleeve 122 by connecting plates 121 on both sides. The connecting plates 121 pass through the aforementioned slots, and the adjusting sleeve 122 is positioned between the two connecting plates 121 passing through the slots, engaging with the threads of the screw 215 to achieve up and down movement.

[0036] A micro-motion frame 123 is provided at the corresponding position of the adjusting screw sleeve 122. The micro-motion frame 123 is connected to the first movable roller 125 through the positioning rods 124 on both sides. The first movable roller 125 can rotate around the axis of the positioning rods 124.

[0037] A slide block 233 is provided in the middle of the micro-motion frame 123, and the slide block 233 is connected to the middle block 232. Slider blocks 231 are provided on both sides of the middle block 232, and the sliders 231 are connected to a top rod 235 mounted on the bottom of the middle block 232 and capable of sliding, via the slide block 233. A driver 234 is provided on the surface of the middle block 232 and is connected to a gear inside it. The gear drives the top rod 235 at the bottom, and the left and right movement of the top rod 235 pushes the slide block 233.

[0038] The top rod 235 is provided with a rod body 351, and the left and right sides of the rod body 351 are provided with pushable connecting shafts 352. When the driver 234 drives the gear to push the rod body 351 to move, the connecting shafts 352 push the slide block 233 accordingly, so that the slider 231 can move up and down a short distance quickly.

[0039] When the rod 351 moves to one side, the connecting shaft 352 on the other side is pulled and reset by the return spring 353, so that the driver 234 can drive the slide 233 on one side to work independently. Thus, the tension on the feeding side or the discharging side can be adjusted separately: adjusting the feeding side can increase the feeding tension; when the discharging side moves upward, the tension entering the corrective roller frame 22 is quickly reduced, thereby avoiding deviation caused by excessive tension.

[0040] To detect tension status, the micro-motion frame 123 has a built-in tension sensor. By monitoring changes in parameters, the equipment can be quickly maintained and adjusted.

[0041] When the paper tension suddenly increases, the improved device can drive the first movable roller 125 to quickly lift upward to relieve pressure by pushing the push rod 235 in the driver 234. This reduces the excess longitudinal tension in front of the correction roller frame 22, allowing the control base 23 to operate under low load and improving correction efficiency. The micro-motion frame 123 drives the first movable roller 125 to move independently and short distance relative to the second movable roller 212, allowing for a smooth tension transition. By utilizing the cooperation of the connecting shafts 352 on both sides of the push rod 235 and the return spring 353, the driver 234 can drive the slider 231 on the feeding side or the discharging side to move independently, so that the first movable roller 125 can move independently on one side, ensuring that the tension control of the front and rear process sections does not interfere with each other.

[0042] The above description only outlines the basic principles and preferred embodiments of the present invention. Those skilled in the art can make many changes and modifications based on the above description, and these changes and modifications should fall within the protection scope of the present invention.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic handkerchief folding machine, comprising a feeding unit (1), a transition roller group (2), a folding roller group (3), a slitting roller group (4), and a conveyor belt (5), wherein the feeding unit (1) is installed at the front end of the transition roller group (2), the roll material passes through the transition roller group (2) and then through the folding roller group (3), and a slitting roller group (4) is provided adjacent to the folding roller group (3), and the discharge end of the slitting roller group (4) is connected to the conveyor belt (5), wherein the transition roller group (2) includes a tension adjustment group (21) and a guide roller, and the guide roller includes a guide roller frame (22) and a control base (23) for driving the guide roller frame (22) to rotate; characterized in that, The tension adjustment assembly (21) includes a fixed roller (211), a second movable roller (212), a main lifting mechanism, and a micro-adjustment component; The main lifting mechanism is connected to the second movable roller (212) via a transmission, and the second movable roller (212) moves up and down along a preset track via the main lifting mechanism; The micro-motion adjustment assembly includes a first movable roller (125) and a micro-motion drive device. The first movable roller (125) is arranged on the sheet path of the second movable roller (212) and moves up and down synchronously with the second movable roller (212). The micro-motion drive device is connected to the first movable roller (125) for transmission. The first movable roller (125) moves up and down a short distance relative to the second movable roller (212) through the micro-motion drive device.

2. The automatic handkerchief folding machine according to claim 1, characterized in that, The main lifting mechanism includes a lifting device (214), a screw (215), and an adjusting sleeve (122). The lifting device (214) is fixedly installed, and the output end of the lifting device (214) is connected to the screw (215). The adjusting sleeve (122) is threadedly connected to the screw (215), and the second movable roller (212) is fixedly connected to the adjusting sleeve (122).

3. The automatic handkerchief folding machine according to claim 2, characterized in that, The micro-motion adjustment assembly also includes a micro-motion frame (123), which is mounted on the adjusting screw sleeve (122). The first movable roller (125) is connected to the micro-motion frame (123) via a positioning rod (124). The micro-motion drive device is disposed on the micro-motion frame (123) and includes a driver (234), a push rod (235), and a sliding assembly. The sliding assembly is connected to the micro-motion frame (123), the driver (234) is drivenly connected to the push rod (235), and the push rod (235) cooperates with the sliding assembly.

4. The automatic handkerchief folding machine according to claim 3, characterized in that, The micro-motion frame (123) is provided with a slide (233) and a middle block (232) that cooperates with the slide (233). The middle block (232) is provided with sliders (231) on both sides. The top rod (235) has a rod body (351) and connecting shafts (352) provided on the left and right sides of the rod body (351). The driver (234) is provided with a gear, which is connected to the rod body (351) for transmission. The connecting shafts (352) on both sides cooperate with the corresponding slides (233). Each side slide (233) is connected to the corresponding slider (231). A return spring (353) is provided at the corresponding position of one side connecting shaft (352).

5. The automatic handkerchief folding machine according to claim 4, characterized in that, The rod (351) of the top rod (235) is provided with a rack structure that meshes with the gear.

6. The automatic handkerchief folding machine according to claim 3, characterized in that, The micro-motion frame (123) has a built-in tension sensor.

7. The automatic handkerchief folding machine according to claim 1, characterized in that, The bottom of the control base (23) is provided with a lifting base (24), which is connected to the control base (23).

8. The automatic handkerchief folding machine according to claim 2, characterized in that, The tension adjustment assembly (21) also includes a support plate. The fixed roller (211) is fixed on the support plate. The support plate is provided with a vertical slide rail (213) and a slot through the support plate. The sliding component of the second movable roller (212) passes through the slot and is connected to the adjusting screw sleeve (122).

9. The automatic handkerchief folding machine according to claim 3, characterized in that, The second movable roller (212) has connecting plates (121) fixed on both sides, the adjusting screw sleeve (122) is fixed between the two connecting plates (121), and the micro-motion frame (123) is mounted on the adjusting screw sleeve (122) and slides in cooperation with the connecting plate (121).

10. The automatic handkerchief folding machine according to claim 3, characterized in that, The first movable roller (125) is rotatably mounted on the micro-motion frame (123) via the positioning rod (124), and the rotation axis of the first movable roller (125) is the axis of the positioning rod (124).

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