Leather punching machine

Abstract

The utility model relates to the field of leather processing equipment, concretely provides a leather puncher, including frame and setting work platform and puncher in the frame, both ends of frame are provided with paper roll and driving roller, paper roll or driving roller swing setting on frame, paper roll and driving roller always tangent, driving roller rotation drives paper roll rotation, the utility model discloses a driving roller is with the mode of tangent and drives paper roll rotation, can guarantee the length of the paper pad that paper roll rotates output or recycles is the rolling distance of one point in the driving roller rotation process, even if the thickness of paper roll changes, since the outer diameter of driving roller does not change, can guarantee the length of the paper pad that is output or recovered from the tangent of driving roller and paper roll is always, can effectively avoid the situation that the paper pad at work platform is damaged due to the change of tension.

Description

Technical Field

[0001] This utility model relates to the field of leather processing equipment, and specifically provides a leather punching machine. Background Technology

[0002] In the leather processing industry, punching is widely used in footwear, bags, automotive interiors, furniture, and clothing to improve the breathability and aesthetics of leather. Punching equipment uses a controlled, up-and-down moving punch to punch holes in leather materials. When punching leather, a layer of liner paper of a certain thickness is placed underneath to prevent the punch from colliding with the working surface after penetrating the leather and causing damage. The liner paper needs to be replaced after a period of use to ensure its protective performance for the punch. In automated punching equipment, the liner paper is generally replaced individually, just like the leather. However, replacing the liner paper piece by piece is time-consuming, labor-intensive, and reduces punching efficiency. Using liner paper in rolls, with paper roll rollers at the front and rear of the machine, allows for continuous liner paper replacement and improves punching efficiency. However, because the thickness of the paper roll changes dynamically during use, it is difficult to keep the output and retracted paper roll lengths consistent, which can easily cause excessive tension on the liner paper. Furthermore, since the padding paper is generally made of corrugated paper with a certain thickness, it has low toughness and many holes after use. During the synchronous rotation of the front and rear paper rolls, the padding paper is prone to breakage due to the different tension forces at the holes. Utility Model Content

[0003] Firstly, to address the aforementioned problems, this utility model provides a leather punching machine capable of uniformly conveying padding paper, accurately controlling the length of the conveying and retrieving paper rolls, and reducing the possibility of the padding paper being pulled and damaged. The specific technical solution is as follows:

[0004] A leather punching machine includes a frame and a work platform and punching cutter disposed in the frame. Paper rolls and drive rollers are disposed at both ends of the frame. The paper rolls or drive rollers are movably disposed on the frame. The paper rolls and the drive rollers are always tangent to each other. The rotation of the drive rollers drives the paper rolls to rotate.

[0005] In this solution, the paper roll is driven to rotate tangentially by the active roller, which ensures that the length of the padding paper output or retracted during the rotation of the paper roll is the rolling distance of one point during the rotation of the active roller. Even if the thickness of the paper roll changes, the outer diameter of the active roller will not change, ensuring that the length of the paper roll output or retracted from the tangent line between the active roller and the paper roll remains constant. This effectively avoids damage to the padding paper at the working platform caused by changes in tension.

[0006] Preferably, the frame includes two parallel and symmetrically arranged vertical support plates. The shaft of the drive roller is mounted on the vertical support plates via a first bearing seat. The paper roll is mounted on the vertical board via a second bearing seat. Guide grooves are symmetrically arranged at both ends of the vertical support plates. The length direction of the guide grooves is located on the line connecting the central axis of the paper roll and the central axis of the drive roller. The first bearing seat or the second bearing seat is slidably disposed in the guide grooves.

[0007] Secondly, in order to ensure that the drive roller can always contact the paper roll, the guide groove is inclined downward, and the first or second shaft seat slidably disposed in the guide groove is located above the guide groove.

[0008] In this scheme, whether the drive roller or the paper roll can slide, the gravity of the drive roller or the paper roll itself can generate a component force that slides downwards into the guide groove, thereby ensuring that the drive roller and the paper roll are always in contact.

[0009] Preferably, the first bearing is fixedly mounted on the vertical support plate, and the second bearing includes rotating bosses sleeved at both ends of the paper roll shaft. A bearing structure is provided between the rotating bosses and the paper roll shaft. The rotating bosses are rolled in the guide groove, and the protruding part of the rotating bosses contacts the surface of the vertical support plate.

[0010] In this design, a fixed drive roller is preferred, while allowing the paper roll to slide. Compared to fixing the paper roll, this ensures that both the output and retraction positions of the paper roll are at the tangent point between the drive roller and the paper roll. Once the drive roller is fixed, this position is also fixed, further ensuring that the amount of paper output or retracted corresponds to the amount of rotation of the drive roller. Furthermore, the rotating boss contacts the surface of the vertical support plate, and this arrangement is present at both ends of the paper roll, ensuring that the paper roll does not experience axial displacement during its sliding within the guide groove.

[0011] As the paper roll is used, its weight will decrease or increase as the padding paper is output or retracted. In order to avoid the problem of slippage caused by excessive friction between the paper roll and the drive roller due to the paper roll being too light, the second shaft seat is connected to a telescopic unit. One end of the telescopic unit is fixedly connected to the frame, and the other end is fixedly connected to the second shaft seat. The telescopic unit provides the second shaft seat with a sliding force towards the first shaft seat through its telescopic movement.

[0012] Preferably, the telescopic unit is an elastic telescopic component.

[0013] Preferably, the telescopic unit is a telescopic cylinder or an electric push rod.

[0014] Thirdly, to ensure consistency between the output and return of padding paper, a rotating shaft on one side of the drive roller extends out of the first shaft seat, and a drive motor is installed on the outside of the vertical support plate. The drive motor is rotatably connected to the drive shafts of the two drive rollers via a conveyor belt. Belt drive ensures that the rotation speed and direction of the two drive rollers are the same, guaranteeing consistent output and return of padding paper.

[0015] The beneficial effects of this utility model are:

[0016] This invention uses an active roller to drive the paper roll in a tangential manner, ensuring that the length of the padding paper output or retracted during the rotation of the paper roll is the rolling distance of one point during the rotation of the active roller. Even if the thickness of the paper roll changes, the outer diameter of the active roller will not change, ensuring that the length of the paper roll output or retracted from the tangent line between the active roller and the paper roll remains constant. This effectively avoids damage to the padding paper at the working platform caused by changes in tension. Attached Figure Description

[0017] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a side view of the present invention;

[0019] Figure 2 This is a front view of the present invention.

[0020] In the above figures, the corresponding reference numerals are as follows:

[0021] 1-Frame, 11-Vertical support plate, 12-Guide groove, 13-Slide rail, 2-Paper roll, 3-Drive roller, 4-First shaft seat, 5-Second shaft seat, 51-Rotating boss, 6-Telescopic unit, 7-Working platform, 8-Punching knife, 9-Drive motor. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings and through specific implementation methods of the embodiments of the present invention.

[0023] Example 1:

[0024] A leather punching machine, such as Figure 1 and Figure 2As shown, the machine includes a frame 1 and a working platform 7 and a punching knife 8 disposed in the frame 1. Paper rolls 2 and drive rollers 3 are disposed at both ends of the frame 1. The paper rolls 2 or drive rollers 3 are movably disposed on the frame 1. The paper rolls 2 and drive rollers 3 are always tangent to each other. The rotation of the drive rollers 3 drives the paper rolls 2 to rotate.

[0025] Specifically, the frame 1 includes two parallel and symmetrically arranged vertical support plates. The rotating shaft of the drive roller 3 is mounted on the vertical support plates via a first bearing 4. The paper roll 2 is mounted on the vertical board via a second bearing 5. Guide grooves 12 are symmetrically arranged at both ends of the vertical support plates. The length direction of the guide grooves 12 is located on the line connecting the central axis of the paper roll 2 and the central axis of the drive roller 3. A guide rail is arranged on the vertical support plate 11 along the length direction of the guide groove 12. A slider adapted to the guide rail is provided on the first bearing 4 or the second bearing 5, so that the first bearing 4 or the second bearing 5 is slidably mounted in the guide groove 12.

[0026] In this embodiment, by driving the paper roll 2 to rotate in a tangential manner through the active roller 3, it can be ensured that the length of the padding paper output or retracted by the paper roll 2 is the rolling distance of one point during the rotation of the active roller 3. Even if the thickness of the paper roll 2 changes, since the outer diameter of the active roller 3 does not change, it can be ensured that the length of the paper roll 2 output or retracted from the tangent of the active roller 3 and the paper roll 2 remains constant, which can effectively prevent the padding paper at the working platform 7 from being damaged due to changes in tension.

[0027] Example 2:

[0028] Based on Embodiment 1, in order to ensure that the drive roller 3 always abuts against the paper roll 2, this embodiment provides a specific implementation structure, such as... Figure 1 As shown, the guide groove 12 is inclined downwards, and the first bearing 4 or the second bearing 5, which is slidably disposed in the guide groove 12, is located above the guide groove 12. Whether the drive roller 3 or the paper roll 2 can slide, the drive roller 3 or the paper roll 2 can rely on its own weight to generate a component force that slides downwards into the guide groove 12, thereby ensuring that the drive roller 3 and the paper roll 2 are always in contact.

[0029] In this preferred embodiment, the first bearing seat 4 is fixedly mounted on the vertical support plate, and the second bearing seat 5 includes rotating bosses 51 sleeved at both ends of the paper roll 2's rotating shaft. A bearing structure is provided between the rotating bosses 51 and the paper roll 2's rotating shaft. The rotating bosses 51 are rolled in the guide groove 12, and the protruding portion of the rotating bosses 51 contacts the surface of the vertical support plate. Preferably, the drive roller 3 is fixed while allowing the paper roll 2 to slide. Compared to fixing the paper roll 2, this ensures that the output and retraction positions of the paper roll 2 are both at the tangent point between the drive roller 3 and the paper roll 2. Once the drive roller 3 is fixed, this position is fixed, further ensuring that the amount of paper output or retraction corresponds to the amount of rotation of the drive roller 3. The rotating bosses 51 contact the surface of the vertical support plate, and this arrangement at both ends of the paper roll 2 ensures that the paper roll 2 will not experience axial displacement during sliding in the guide groove 12.

[0030] Furthermore, during use, the weight of the paper roll 2 will decrease or increase as the padding paper is output or retracted. In order to avoid the problem of slippage caused by excessive friction between the paper roll 2 and the drive roller 3 due to its small weight, the second shaft seat 5 is connected to a telescopic unit 6. One end of the telescopic unit 6 is fixedly connected to the frame 1, and the other end is fixedly connected to the second shaft seat 5. The telescopic unit 6 provides the second shaft seat 5 with a sliding force towards the first shaft seat 4 through telescopic movement.

[0031] Of course, the telescopic unit 6 can be an elastic telescopic component, a telescopic cylinder, or an electric push rod. When the telescopic unit 6 uses an elastic telescopic component, a tension spring is preferred. The two ends of the tension spring are respectively connected to the first bearing 4 and the second bearing 5. No other external force is needed to provide a force towards the first bearing 4 to the second bearing 5, ensuring that the surface of the paper roll 2 always abuts against the drive roller 3. When using a telescopic cylinder or electric push rod, the telescopic cylinder or electric push rod is preferably located on both sides of the frame 1, that is, one telescopic cylinder or electric push rod is provided at each end of the paper roll 2. The two telescopic cylinders or electric push rods are independently controlled, using existing cylinders or electric push rods that can precisely adjust the telescopic amount. Relying on the telescopic cylinder or electric push rod to actively control the pushing stroke allows for more precise control of the parallelism of the two paper rolls 2 compared to an elastic telescopic component, reducing the possibility of the paper roll 2 deviating.

[0032] Example 3:

[0033] Based on the above embodiments, in order to ensure consistency between the output pad paper and the returned pad paper, such as... Figure 1 As shown, the rotating shaft on one side of the drive roller 3 extends out of the first bearing seat 4, and a drive motor 9 is provided on the outside of the vertical support plate 11. The drive motor 9 is rotatably connected to the drive shafts of the two drive rollers 3 via a conveyor belt. The belt drive ensures that the rotation speed and direction of the two drive rollers 3 are the same, guaranteeing that the amount of output pad paper and recycled pad paper is consistent.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A leather punching machine, comprising a frame and a work platform and punching cutters disposed within the frame, characterized in that, Paper rolls and drive rollers are provided at both ends of the frame. The paper rolls or drive rollers are movably mounted on the frame. The paper rolls and drive rollers are always tangent to each other. The rotation of the drive rollers drives the paper rolls to rotate.

2. The leather punching machine according to claim 1, characterized in that, The frame includes two parallel and symmetrically arranged vertical support plates. The shaft of the drive roller is mounted on the vertical support plate via a first bearing seat. The paper roll is mounted on the vertical support plate via a second bearing seat. Guide grooves are symmetrically arranged at both ends of the vertical support plate. The length direction of the guide groove is located on the line connecting the central axis of the paper roll and the central axis of the drive roller. The first bearing seat or the second bearing seat is slidably disposed in the guide groove.

3. A leather punching machine according to claim 2, characterized in that, The guide groove is inclined downwards, and the first or second bearing seat, which is slidably disposed in the guide groove, is located above the guide groove.

4. A leather punching machine according to claim 3, characterized in that, The first bearing seat is fixedly mounted on the vertical support plate. The second bearing seat includes rotating bosses sleeved at both ends of the paper roll shaft. A bearing structure is provided between the rotating bosses and the paper roll shaft. The rotating bosses are rolled in the guide groove. The protruding part of the rotating bosses is in contact with the surface of the vertical support plate.

5. A leather punching machine according to claim 4, characterized in that, The second shaft seat is connected to a telescopic unit. One end of the telescopic unit is fixedly connected to the frame, and the other end is fixedly connected to the second shaft seat. The telescopic unit provides the second shaft seat with a sliding force towards the first shaft seat through telescopic movement.

6. A leather punching machine according to claim 5, characterized in that, The telescopic unit is an elastic telescopic component.

7. A leather punching machine according to claim 5, characterized in that, The telescopic unit is a telescopic cylinder or an electric push rod.

8. A leather punching machine according to claim 4, characterized in that, The rotating shaft on one side of the active roller extends out of the first shaft seat, and an active motor is provided on the outside of the vertical support plate. The active motor is rotatably connected to the drive shaft of the two active rollers through a conveyor belt.

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