A folding device

Abstract

The present application relates to a kind of folding device, comprising: sharp nose;Folding plate, including support part and two waist shaft, sharp nose is opposite fixed to the end of support part, two waist shafts are symmetrically distributed in the both sides of support part, and two waist shafts meet at sharp nose along the extension line of length direction of itself, two waist shafts all have first end close to sharp nose and second end away from sharp nose, two waist shafts are rotatably arranged in support part along the plane where support part is located, paper tape is conveyed to folding plate by paper guide roll, and it moves to sharp nose along two waist shafts on folding plate, in this process, paper tape naturally falls by the guidance of waist shaft, is lifted up by sharp nose, so that paper tape is folded along center line, before paper tape is folded, according to the characteristics of paper tape, by the rotation of second end of waist shaft relative to first end of itself, the slope of waist shaft is adjusted, i.e. the size of the included angle between two waist shafts is adjusted, so that it is more suitable for the characteristics of current paper tape, improve the folding quality of paper tape.

Description

Technical Field

[0001] This invention relates to the field of paper tape folding technology, and in particular to a folding device. Background Technology

[0002] As web-fed printing presses become increasingly widely used, the folding device that matches them has become a major piece of equipment affecting the production efficiency and quality of web-fed printing presses.

[0003] Traditional folding devices use a triangular plate to pre-fold the paper strip. After being unwound by the unwinding equipment, the paper strip is guided onto the triangular plate by the guide rollers on the folding device. The paper strip is pressed into a crease by the creasing mechanism on the triangular plate. Driven by the traction rollers, the paper strip travels closely against the inclined surface of the triangular plate. The middle of the paper strip is lifted by the nose of the triangular plate, and the two sides naturally close together along the hypotenuse of the triangular plate, thus completing a precise fold. In this process, the angle between the side of the triangular plate and the center line is the key geometric parameter that determines the folding quality.

[0004] When the paper tape is thin and has low stiffness, the sides of the triangle plate should have a smaller slope, meaning the angle between the two sides of the triangle plate should be larger. This reduces the contact area between the paper tape and the sides of the triangle plate, lowers the friction between them, and prevents the paper tape from breaking due to excessive friction during high-speed movement. When the paper tape is thick and has high stiffness, the sides of the triangle plate should have a larger slope, meaning the angle between the two sides of the triangle plate should be smaller. This increases the contact area between the paper tape and the triangle plate, increases the guiding distance of the triangle plate on the paper tape, and makes the folding process smoother, improving the folding effect. However, current triangle plate folding devices have fixed slopes on both sides, making it impossible to adjust the slope of the triangle plate according to the characteristics of the paper tape, which has certain limitations. Summary of the Invention

[0005] Therefore, it is necessary to address the problem that the side angle and slope of traditional triangular folding devices are fixed, and to provide a folding device that can adjust the slope of the triangular plate side according to the characteristics of the paper tape.

[0006] A folding device, comprising: pointed nose; A folding panel includes a support portion and two spindles. A pointed nose is fixed to one end of the support portion. The two spindles are symmetrically distributed on both sides of the support portion, and their extensions along their length converge at the pointed nose. Each spindle has a first end near the pointed nose and a second end away from the pointed nose. Both spindles are rotatably mounted on the support portion along the plane of the support portion. The second end of each spindle can rotate relative to its first end to adjust the angle between the two spindles. A guide roller, located at the other end of the support relative to the nose, is used to feed paper tape to the folding plate.

[0007] In one embodiment, the two first ends are movably disposed on the support along the axial direction of the waist axis, so as to be away from or close to the tip.

[0008] In one embodiment, two first ends are rotatably connected to a central shaft, and a connecting shaft is fixed to the lower end of the central shaft, the connecting shaft being rotatably connected relative to the support portion; The central axis is eccentrically positioned relative to the connecting axis.

[0009] In one embodiment, the folding device further includes a first driving mechanism, which is fixed to the lower side of the support portion and is used to drive the two connecting shafts to rotate synchronously.

[0010] In one embodiment, the two first ends are rotatably disposed relative to the nose tip and remain fixed in their relative position to the nose tip.

[0011] In one embodiment, the first end is rotatably connected to a central shaft, which is fixed radially relative to the nose tip. The second end rotates around the central axis.

[0012] In one embodiment, the folding device further includes a second fixing frame and a second driving mechanism, wherein the paper guide roller and the support are both fixed to the second fixing frame; The second drive mechanism is used to drive the second ends of the two waist shafts to rotate around their respective central axes.

[0013] In one embodiment, a connector is fixed to the second end of the waist shaft, the connector has an arc-shaped guide groove, and a guide post is fixed to the second fixing frame. The guide post axially passes through the arc-shaped guide groove and is slidably connected to it. The center of the arc-shaped guide groove coincides with the central axis, and its curvature is consistent with the motion trajectory of the second end.

[0014] In one embodiment, the support includes a middle plate and two side plates, the middle plate being fixedly disposed relative to the nose and the guide roller; The two side plates are fixedly connected to the two waist shafts respectively.

[0015] In one embodiment, the folding device further includes: frame; A position adjustment mechanism, comprising a movable plate slidably disposed on the frame, wherein the nose cone, folding plate and guide roller are all fixedly disposed relative to the movable plate in the horizontal direction; A height adjustment mechanism includes a hinge rod, the upper end of which is hinged to the folding plate and located close to the nose. The lower end of the hinge rod can move up and down in the vertical direction. The folding plate is rotatable in the vertical plane relative to the moving plate. The height of the nose can be adjusted by adjusting the height of the hinge rod.

[0016] In the aforementioned folding device, the paper strip is conveyed to the folding plate by a guide roller and moves along the two waist axes on the folding plate to the nose. During this process, the paper strip falls naturally under the guidance of the waist axes and is pushed upward by the nose, causing the paper strip to be folded along the center line. Before the paper strip is folded, the slope of the waist axes can be adjusted by rotating the second end of the waist axis relative to its first end, according to the characteristics of the paper strip. That is, the angle between the two waist axes is adjusted to better suit the characteristics of the current paper strip, thereby improving the folding quality of the paper strip. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of a folding device provided in this application; Figure 2 A top view of a folding device provided in this application; Figure 3 A front view of a folding device provided in this application; Figure 4 A schematic diagram of the paper guide roller, folding plate, and nose of a folding device provided in this application; Figure 5 For this application Figure 4 Enlarged view of point A in the middle; Figure 6 A schematic diagram of the structure of the folding plate in a folding device provided in this application; Figure 7 A schematic diagram of the first drive mechanism and the second drive mechanism in a folding device provided in this application; Figure 8 A schematic diagram showing the installation position of the first traction rod in a folding device provided in this application; Figure 9 For this application Figure 8 Enlarged view of point B in the middle; Figure 10 This is a schematic diagram showing the adjustment state of the included angle of the two waist axes in a folding device provided in this application.

[0018] Figure label: 2. Frame; 3. Position adjustment mechanism; 31. Moving plate; 311. Slide; 312. Guide rail; 313. Third stepper motor; 314. Third screw; 315. Third slider; 32. Rotary connection mechanism; 321. Rotating seat; 322. Rotating shaft; 323. Connecting seat; 4. Height adjustment mechanism; 41. Hinge rod; 42. Lifting screw; 43. Buckle; 44. Adjusting nut; 10. Nose; 11. Folding plate; 111. Support part; 1111. Middle plate; 1112. Side plate; 112. Waist shaft; 1121. First 1122. Second end; 1131. Central shaft; 1132. Connecting shaft; 12. Guide roller; 13. Second drive mechanism; 131. Second traction rod; 132. Connecting piece; 1321. Connecting part; 1322. Hinge part; 1323. Guide part; 1324. Arc-shaped guide groove; 1325. Guide post; 133. Second slider; 14. Second fixing frame; 15. First fixing frame; 16. First drive mechanism; 161. Crank; 162. First traction rod; 163. First slider; 17. Slide rail; 18. Indentation mechanism. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] Example 1: See Figure 1 , Figure 1 A schematic diagram of a folding device according to an embodiment of the present invention is shown. An embodiment of the present invention provides a folding device comprising: The pointed nose 10 is an isosceles triangle with two vertical planes on its two sides, which meet at the tip of the pointed nose 10 to form an edge so that the paper strip can be folded in half. See Figure 6 , Figure 6The diagram shows a structural schematic of a folding plate in a folding device according to an embodiment of the present invention. The folding plate 11 includes a support portion 111 and two waist shafts 112. A nose 10 is fixed to one end of the support portion 111. The two waist shafts 112 are symmetrically distributed on both sides of the support portion 111, and the extension lines of the two waist shafts 112 along their own length direction intersect at the nose 10. Each waist shaft 112 has a first end 1121 close to the nose 10 and a second end 1122 away from the nose 10. Both waist shafts 112 are rotatably disposed on the support portion 111 along the plane of the support portion 111. The second ends 1122 of the two waist shafts 112 can rotate relative to their first ends 1121 to adjust the included angle between the two waist shafts 112. Additionally, a guide roller 12 is disposed at the other end of the support portion 111 relative to the nose 10, for feeding paper tape to the folding plate 11.

[0026] As web-fed printing presses become increasingly widely used, the folding devices that match them have become the main equipment affecting the production efficiency and quality of web-fed printing presses.

[0027] Traditional folding devices use a triangular plate to pre-fold the paper strip. After being unwound by the unwinding equipment, the paper strip is guided onto the triangular plate by the guide rollers on the folding device. The paper strip is pressed into a crease by the creasing mechanism on the triangular plate. Driven by the traction rollers, the paper strip travels closely against the inclined surface of the triangular plate. The middle of the paper strip is lifted by the nose of the triangular plate, and the two sides naturally close together along the hypotenuse of the triangular plate, thus completing a precise fold. In this process, the angle between the side of the triangular plate and the center line is the key geometric parameter that determines the folding quality.

[0028] When the paper tape is thin and has low stiffness, the sides of the triangle should have a smaller slope, meaning the angle between the two sides of the triangle should be larger. A smaller slope means a larger angle between the sides of the triangle and the direction of paper tape travel, resulting in a shorter length of the sides of the triangle on the paper tape. By reducing the slope of the triangle, the length of the triangle on the paper tape is reduced, thereby reducing the contact area between the paper tape and the sides of the triangle, and reducing the friction between them. Since thin paper tapes have low tensile strength, if the friction between the paper tape and the triangle is too great when the paper tape is moving at high speed, it is very likely to break. Therefore, reducing the friction between the sides of the triangle and the paper tape can effectively prevent the paper tape from breaking. Moreover, thin paper tapes with low stiffness are easier to fold, and the small slope of the triangle sides has little impact on the folding of the paper tape, allowing it to be folded smoothly. When the paper strip is thick and stiff, the sides of the triangle should have a larger slope, meaning the angle between the two sides of the triangle should be smaller. This increases the length of the triangle's sides on the paper strip, increasing the contact area between the paper strip and the triangle, and improving the guiding distance of the triangle. This makes the folding process smoother and improves the folding effect. If the slope of the triangle's sides is too small, the contact length between the triangle's sides and the paper strip is small, and the guiding distance is short. When the thick, stiff paper strip passes the triangle quickly, it may detach from the triangle before the fold is complete, causing the folding to deviate and affecting the folding quality.

[0029] However, current triangular folding devices have fixed slopes on both sides, making it impossible to adjust the slopes of the triangular plates according to the characteristics of the paper tape, which has certain limitations.

[0030] See Figure 4 , Figure 6 , Figure 4 The diagram shows an overhead structure of a paper guide roller, folding plate, and nose tip in a folding device according to an embodiment of the present invention. Further, two first ends 1121 are movably disposed on the support portion 111 along the axial direction of their respective waist axis 112, so as to move away from or close to the nose tip 10.

[0031] This configuration ensures that after the first end 1121 moves away from the nose 10, a gap is formed between the first end 1121 and the nose 10. After the second end rotates around the first end as the center, the first end 1121 can come into contact with the nose 10. This ensures that before and after adjusting the slope of the waist axis 112, the first end 1121 of the waist axis 112 is always in contact with the nose 10. This ensures that the paper tape moves smoothly from the waist axis 112 to the nose 10, preventing the gap between the waist axis 112 and the nose 10 from scratching the paper tape and causing it to break.

[0032] See Figure 8 , Figure 9 , Figure 8 This diagram illustrates the installation position of the first traction rod in a folding device according to an embodiment of the present invention. Figure 9 It shows Figure 8 In the enlarged schematic diagram at point B, the two first ends 1121 are rotatably connected to a central shaft 1131, and a connecting shaft 1132 is fixed at the lower end of the central shaft 1131. The connecting shaft 1132 is rotatably connected to the support part 111. The central shaft 1131 and the connecting shaft 1132 are eccentrically set.

[0033] This configuration allows the connecting shaft 1132 to rotate, driving the central shaft 1131 to rotate around the axis of the connecting shaft 1132, thereby moving the first end 1121 away from or closer to the tip 10.

[0034] See Figure 7 , Figure 7 The diagram shows a schematic of the structure of a first driving mechanism and a second driving mechanism in a folding device according to an embodiment of the present invention. Further, the folding device also includes a first driving mechanism 16, which is fixed to the lower side of the support part 111 and is used to drive the two connecting shafts 1132 to rotate synchronously.

[0035] In this embodiment, the folding device also includes a first fixing frame 15, the nose 10, the support part 111 and the first driving mechanism 16 are all fixed on the first fixing frame 15, and the connecting shaft 1132 passes through the first fixing frame 15 axially and is rotatably connected to it.

[0036] Specifically, the first drive mechanism 16 includes a first slider 163, two cranks 161, and two first traction rods 162. One end of each of the two cranks 161 is fixedly connected to the lower end of each of the two connecting shafts 1132. The two first traction rods 162 are rotatably connected to the other end of each of the two cranks 161. The other end of each of the two first traction rods 162 is hinged to the first slider 163. The first slider 163 can move synchronously along the midline direction of the angle formed by the two waist shafts 112.

[0037] In some embodiments, the folding device further includes a slide rail 17, which is fixed to a first fixing frame 15. A first slider 163 is slidably connected to the slide rail 17. A first screw is internally threaded onto the first slider 163. A first bearing is rotatably connected to both ends of the first screw. The first bearing is fixedly connected to the slide rail 17. A first stepper motor can be provided on the slide rail 17 to drive the first screw to rotate, thereby controlling the first slider 163 to move along the slide rail 17.

[0038] In some embodiments, a cylinder can be used instead of the first stepper motor and the first screw to directly drive the first slider 163 to move along the slide rail 17.

[0039] In some embodiments, the connecting shaft 1132 can be directly driven to rotate by two stepper motors, which can replace the first drive mechanism 16 in turn, thereby adjusting the relative position of the first end 1121 and the nose 10.

[0040] Furthermore, the support 111 includes an intermediate plate 1111 and two side plates 1112, with the intermediate plate 1111 fixedly disposed relative to the nose 10 and the guide roller 12; The two side plates 1112 are fixedly connected to the two waist shafts 112 respectively.

[0041] This configuration allows the two side plates 1112 to move synchronously with the two waist shafts 112, thereby increasing the support area of ​​the waist shafts 112 on the paper tape and improving the stability of the paper tape during the conveying process.

[0042] See Figure 10 , Figure 10 The figure shows a schematic diagram of the angle adjustment state of the two waist shafts in a folding device according to an embodiment of the present invention. The figure shows that after the waist shaft 112 rotates, the angle between the two waist shafts 112 is adjusted. The side plate 1112 rotates together with the waist shaft 112 and separates from the middle plate 1111.

[0043] See Figure 2 , Figure 3 , Figure 2 A top view of a folding device according to an embodiment of the present invention is shown. Figure 3 The diagram shows a front view of a folding device according to an embodiment of the present invention. Further, the folding device includes: Rack 2; The position adjustment mechanism 3 includes a movable plate 31, which is slidably disposed on the frame 2. The nose 10, the folding plate 11, and the guide roller 12 are all fixedly disposed in the horizontal direction relative to the movable plate 31.

[0044] Specifically, two slide blocks 311 are fixed to the lower end face of the movable plate 31. Each slide block 311 is slidably connected to a guide rail 312. The guide rail 312 is fixed to the frame 2, so that the movable plate can move horizontally stably on the frame 2. A third slider 315 is also fixed to the lower end face of the movable plate 31. A third screw 314 is threadedly connected to the third slider 315. Both ends of the third screw 314 are rotatably connected to a third shaft seat fixed to the frame 2. A third stepper motor 313 is installed on the frame 2. The third screw 314 is poweredly connected to the output shaft of the third stepper motor 313. The third screw 314 can be driven to rotate by the third stepper motor 313, thereby driving the movable plate 31 to move horizontally along the horizontal plane. Furthermore, the folding device also includes a height adjustment mechanism 4, which includes a hinge rod 41. The upper end of the hinge rod 41 is hinged to the folding plate 11 and is located near the nose 10. The lower end of the hinge rod 41 can move up and down in the vertical direction. The folding plate 11 is rotatably arranged in the vertical plane relative to the moving plate 31. The height of the nose 10 can be adjusted by adjusting the height of the hinge rod 41.

[0045] Specifically, the lower end of the hinge rod 41 is rotatably connected to a lifting screw 42, so that the lifting screw 42 and the hinge rod 41 can be bent and rotate in the same vertical plane. An adjusting nut 44 is threaded onto the lifting screw 42, and the adjusting nut 44 is rotatably connected to the moving plate 31. By rotating the adjusting nut 44, the lifting screw 42 can be vertically raised and lowered, thereby raising and lowering the height of the nose 10 to adapt to the needs of different workstations.

[0046] A buckle 43 can also be provided on the outer periphery of the lifting screw 42. The buckle 43 can be fixedly connected to the adjusting nut 44. Through the engagement between the buckle 43 and the lifting screw 42, the height of the lifting screw 42 can be stably limited.

[0047] See Figure 6 In this embodiment, the folding device also includes a creasing mechanism 18, which is located in the center of the folding plate 11. The creasing mechanism 18 is fixed to the second fixing frame 14 by a bracket. The creasing mechanism 18 can press a crease in the middle of the paper strip passing through the folding plate 11 so that the paper strip can be folded in half later.

[0048] Specifically, the creasing mechanism 18 includes a creasing wheel and a support wheel. The creasing wheel can be serrated. The creasing wheel and the support wheel rotate synchronously in opposite directions through a transmission mechanism. The serrations on the creasing wheel abut against the outer periphery of the support wheel. The creasing wheel is aligned with the nose 10. A through groove is provided on the intermediate plate 1111. The abutment position of the creasing wheel and the support wheel is within the through groove. When the paper tape passes between the creasing wheel and the support wheel, a dotted crease can be pressed into the middle of the paper tape by the creasing wheel, so that the paper tape can be folded in half later.

[0049] Example 2: The difference from Embodiment 1 is that the two first ends 1121 are rotatably disposed relative to the nose 10, and their relative positions with the nose 10 remain fixed.

[0050] Furthermore, the first end 1121 is rotatably connected to a central shaft 1131, which is fixedly disposed radially relative to the nose 10; The second end 1122 rotates around the central axis 1131.

[0051] Specifically, in order to avoid interference between the waist shaft 112 and the nose 10 during rotation, a gap is reserved between the first end 1121 of the waist shaft 112 and the nose 10 in the initial state, allowing it to rotate.

[0052] Furthermore, the folding device also includes a second fixing frame 14 and a second driving mechanism 13. The paper guide roller 12 and the support part 111 are both fixed to the second fixing frame 14, and the second fixing frame 14 is fixed to the slide rail 17. The second drive mechanism 13 is used to drive the second ends 1122 of the two waist shafts 112 to rotate around their respective central axes 1131.

[0053] Specifically, the second drive mechanism 13 includes two second traction rods 131 and a second slider 133. The second slider 133 is slidably connected to the slide rail 17. One end of each of the two second traction rods 131 is hinged to the second slider 133, and the other end is rotatably connected to the second end 1122 of the two waist shafts 112. The second slider 133 is internally threaded with a second screw. Both ends of the second screw are rotatably connected to a second bearing. The two second bearings are fixed to the slide rail 17. A second stepper motor is mounted on the slide rail 17. The output shaft of the second stepper motor is poweredly connected to the second screw. The second screw is driven to rotate by the second stepper motor, thereby controlling the second slider 133 to slide along the slide rail 17.

[0054] Furthermore, a connector 132 is fixed to the second end 1122 of the waist shaft 112. The connector 132 has an arc-shaped guide groove 1324. A guide post 1325 is fixed to the second fixing bracket 14. The guide post 1325 axially penetrates the arc-shaped guide groove 1324 and is slidably connected to it. See Figure 5 The connector 132 is integrally formed by the connecting part 1321, the hinge part 1322 and the guide part 1323. The connecting part 1321 is fixed to the second end 1122 of the waist shaft 112 by bolts. The hinge part 1322 is hinged to the end of the second traction rod 131 away from the second slider 133. The arc-shaped guide groove 1324 is opened in the guide part 1323.

[0055] The center of the arc-shaped guide groove 1324 coincides with the central axis 1131, and its curvature is consistent with the movement trajectory of the second end 1122.

[0056] This configuration ensures the stability of the waist shaft 112 during rotation by sliding the guide post 1325 and the arc-shaped guide groove 1324, thereby improving the accuracy of its slope adjustment.

[0057] Furthermore, the second fixed frame 14 is connected to the moving plate 31 via a rotating connection mechanism 32. The rotating connection mechanism 32 includes two rotating seats 321, two connecting seats 323, and a rotating shaft 322. The two rotating seats 321 are fixed to the second fixed frame 14, and the two connecting seats 323 are fixed to the second fixed frame 14. The rotating shaft 322 passes through the two rotating seats 321 and the two connecting seats 323. The rotating shaft 322 is fixedly connected to the connecting seats 323 and rotatably connected to the two rotating seats 321. When the height adjustment mechanism 4 raises or lowers the nose 10, the folding plate 11, the second fixed frame 14, and the connecting seats 323 all rotate around the rotating shaft 322.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A folding device, characterized in that, include: Pointed nose (10); The folding plate (11) includes a support (111) and two waist shafts (112). The nose (10) is fixed to one end of the support (111). The two waist shafts (112) are symmetrically distributed on both sides of the support (111), and the extension lines of the two waist shafts (112) along their own length direction intersect at the nose (10). Each of the two waist shafts (112) has a first end (1121) near the nose (10) and a second end (1122) away from the nose (10). Both waist shafts (112) are rotatably disposed on the support (111) along the plane of the support (111). The second end (1122) of each of the two waist shafts (112) can rotate relative to its first end (1121) to adjust the included angle between the two waist shafts (112). A guide roller (12), located at the other end of the support (111) opposite to the nose (10), is used to feed paper tape to the folding plate (11).

2. The folding device according to claim 1, characterized in that, The two first ends (1121) are movably disposed on the support (111) along the axial direction of the waist axis (112) in which they are located, so as to be away from or close to the nose (10).

3. The folding device according to claim 2, characterized in that, The two first ends (1121) are rotatably connected to a central shaft (1131), and a connecting shaft (1132) is fixed at the lower end of the central shaft (1131). The connecting shaft (1132) is rotatably connected to the support part (111). The central shaft (1131) and the connecting shaft (1132) are eccentrically arranged.

4. The folding device according to claim 3, characterized in that, The folding device further includes a first driving mechanism (16), which is fixed to the lower side of the support (111) and is used to drive the two connecting shafts (1132) to rotate synchronously.

5. The folding device according to claim 1, characterized in that, The two first ends (1121) are rotatably disposed relative to the tip (10) and their relative positions with the tip (10) remain fixed.

6. The folding device according to claim 5, characterized in that, The first end (1121) is rotatably connected to a central shaft (1131), which is fixedly arranged radially relative to the tip (10); The second end (1122) rotates around the central axis (1131).

7. The folding device according to claim 6, characterized in that, The folding device also includes a second fixing frame (14) and a second driving mechanism (13), and the paper guide roller (12) and the support part (111) are both fixed to the second fixing frame (14). The second drive mechanism (13) is used to drive the second ends (1122) of the two waist shafts (112) to rotate around their respective central axes (1131).

8. The folding device according to claim 7, characterized in that, The second end (1122) of the waist shaft (112) is fixed with a connector (132), the connector (132) is provided with an arc-shaped guide groove (1324), the second fixing frame (14) is fixed with a guide post (1325), the guide post (1325) axially penetrates the arc-shaped guide groove (1324) and is slidably connected to it; The center of the arc-shaped guide groove (1324) coincides with the central axis (1131), and its curvature is consistent with the motion trajectory of the second end (1122).

9. The folding device according to claim 1, characterized in that, The support (111) includes a middle plate (1111) and two side plates (1112), the middle plate (1111) being fixedly disposed relative to the nose (10) and the guide roller (12); The two side plates (1112) are fixedly connected to the two waist shafts (112) respectively.

10. The folding device according to claim 1, characterized in that, The folding device further includes: Rack (2); The position adjustment mechanism (3) includes a movable plate (31), which is slidably disposed on the frame (2). The nose (10), folding plate (11) and guide roller (12) are all fixedly disposed in the horizontal direction relative to the movable plate (31). The height adjustment mechanism (4) includes a hinge rod (41), the upper end of which is hinged to the folding plate (11) and is located close to the nose (10). The lower end of the hinge rod (41) can move up and down in the vertical direction. The folding plate (11) is rotatably arranged in the vertical plane relative to the moving plate (31). The height of the nose (10) can be adjusted by adjusting the height of the hinge rod (41).

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