Leather punching equipment

Abstract

The present invention discloses a leather punching device, comprising: a paper receiving mechanism, a feed roller, a tension adjustment mechanism and a punching device. The paper receiving mechanism comprises: a paper receiving bracket, a paper receiving roller and a winding motor. The paper receiving roller is used to receive paper and wind the paper into a paper roll, and the feed roller is used to convey paper to the paper receiving roller. The tension adjustment mechanism is arranged between the paper receiving roller and the feed roller, and the tension adjustment mechanism comprises a tension adjustment bracket, a tension detection roller, a friction roller and a clutch. The tension detection sensor is used to detect the tension of the paper, the friction roller is used to receive the paper passing through the tension detection roller and increase the tension of the paper, and the clutch is used to adjust the tightness of the friction roller. The punching device is arranged on the side of the feed roller away from the paper receiving mechanism, and the punching device is used to punch holes in leather. The present invention can effectively adjust the tension of the paper during the paper winding process, thereby preventing the paper roll formed by the paper winding from being too loose.

Description

Technical Field

[0001] The present invention relates to the field of leather processing equipment, in particular to a leather punching device, which can be applied to the production of polyvinyl chloride artificial leather (also called PVC artificial leather), thermoplastic polyolefin artificial leather (also called TPO artificial leather), etc. Background Art

[0002] With the development of automobile technology, people's requirements for the comfort of automobile interior are increasing day by day. Currently, leather is mainly used as the main material of automobile interior to improve the texture and comfort of automobile interior.

[0003] In order to improve the texture of leather and its air permeability, heat dissipation, anti-slip properties, etc., the leather needs to be punched during the leather processing process. When punching, a layer of cardboard is usually placed under the leather to protect the punching tool and the leather. After the punching is completed, the leather and cardboard are rolled up.

[0004] However, the tension of the cardboard in the current punching equipment is unstable during the cardboard rolling process, which easily leads to the paper roll formed after the cardboard is rolled up being loose and presenting irregular shapes such as non-cylindrical, which is not conducive to subsequent processing or reuse. Summary of the Invention

[0005] The present invention aims to address the problem of unstable cardboard tension during the cardboard rewinding process in current punching equipment, which can easily lead to loose paper rolls and irregular shapes such as non-cylindrical shapes, which are not conducive to subsequent processing or reuse. The present invention provides a leather punching device that effectively solves this problem.

[0006] To solve the above technical problems, the embodiments of the present invention disclose a leather punching device, comprising:

[0007] Paper collection mechanism, including:

[0008] Paper collection bracket;

[0009] a paper receiving roller, rotatably connected to the paper receiving bracket, the paper receiving roller extending along the width direction of the leather punching device, and used for receiving paper and winding the paper into a paper roll;

[0010] A winding motor is provided at one end of the paper receiving roller, the winding motor is connected to the paper receiving roller, and the winding motor can drive the paper receiving roller to rotate;

[0011] a feeding roller extending along the width direction of the leather punching device, the feeding roller being used to convey the paper to the paper receiving roller;

[0012] Controller;

[0013] A tension adjustment mechanism is provided between the paper receiving roller and the feeding roller, and is used to adjust the tension of the paper. The tension adjustment mechanism includes:

[0014] Tension adjustment bracket;

[0015] a tension detection roller extending along the width direction, the tension detection roller being rotatably connected to the tension adjustment bracket, the tension detection roller being used to receive the paper, and tension detection sensors being respectively provided at both ends of the tension detection roller along the width direction, the tension detection sensors being connected to the controller, and being used to detect the tension of the paper;

[0016] a friction roller extending along the width direction, the friction roller being rotatably connected to the tension adjustment bracket, the friction roller being used to receive the paper passing through the tension detection roller and increase the tension of the paper;

[0017] A clutch, the clutch being fixed to the tension adjustment bracket, the clutch being connected to the controller, and the controller controlling the clutch to adjust the tightness of the friction roller according to the tension of the paper;

[0018] The punching device is arranged on a side of the feeding roller away from the paper receiving mechanism, and the punching device is used for punching holes in leather.

[0019] The above technical solution provides a tension adjustment mechanism. A tension sensor on the tension detection roller detects the actual tension of the paper. A controller then compares the actual tension with a set tension value. When the tension sensor detects that the paper tension is greater than the set value (i.e., the set tension), indicating that the paper tension is too high, the controller controls the clutch to loosen the rotation of the friction roller relative to the paper delivery support, making it easier for the friction roller to rotate. As the paper passes through the friction roller, the tension applied to the paper by the friction roller is reduced, preventing the paper roll from being too tight after being wound by the paper delivery roller. This effectively prevents the leather from being stretched during the punching process, resulting in product failure. When the tension sensor detects that the paper tension is less than the set value (i.e., the set tension), indicating that the paper tension is too low, the controller controls the clutch to tighten the rotation of the friction roller relative to the paper delivery support, making it more difficult for the friction roller to rotate. As the paper passes through the friction roller, the tension applied to the paper by the friction roller is increased, preventing the paper roll from being too loose after being wound by the paper delivery roller, resulting in an excessively large roll diameter, and avoiding increased roll unloading frequency that affects production efficiency.

[0020] According to a specific embodiment of the present invention, the tension adjustment bracket and the paper receiving bracket are integrally formed.

[0021] According to a specific embodiment of the present invention, the clutch comprises:

[0022] a fixing portion, fixed to the tension adjustment bracket;

[0023] an abutment portion, telescopically connected to the fixing portion, the abutment portion being capable of abutting against the surface of the friction roller, the abutment portion comprising an arcuate inner surface, the arcuate inner surface being capable of contacting and abutting against the surface of the friction roller;

[0024] When the tension detection sensor detects that the tension of the paper is greater than a set value, the controller controls the abutment portion to retract in a direction away from the friction roller so that the force with which the abutment portion abuts against the friction roller is reduced. When the tension detection sensor detects that the tension of the paper is less than a set value, the controller controls the abutment portion to extend toward the friction roller so that the force with which the abutment portion abuts against the friction roller is increased.

[0025] By adopting the above technical solution, a tension adjustment mechanism is provided, and the actual tension of the paper is detected by the tension detection sensor on the tension detection roller. Then, the actual tension is compared with the set value of the tension through the controller. When the tension detection sensor detects that the tension of the paper is greater than the set value (i.e., the set tension), the tension of the current paper is too large, and the controller controls the abutment portion to retract in the direction away from the friction roller, so that the force of the abutment portion abutting against the friction roller is reduced. As a result, the friction roller rotates more loosely relative to the paper receiving bracket, that is, the friction roller rotates more easily, so that when the paper passes through the friction roller, the tension applied to the paper by the friction roller is reduced, so as to avoid the paper roll formed after the paper is wound up by the paper receiving roller from being too tight, and can effectively prevent the leather from being stretched during the punching process, resulting in product scrapping. When the tension detection sensor detects that the tension of the paper is less than the set value (i.e., the set tension), the tension of the current paper is too small, and the controller controls the abutting portion to extend toward the friction roller, so that the force with which the abutting portion abuts against the friction roller increases. As a result, the friction roller rotates tighter relative to the paper receiving bracket, that is, the friction roller rotates more difficultly, so that when the paper passes through the friction roller, the tension applied to the paper by the friction roller increases, so as to avoid the paper roll formed after the paper is wound up by the paper receiving roller being too loose, resulting in the paper roll diameter being too large, and to avoid increasing the frequency of unloading the paper roll, thereby affecting production efficiency.

[0026] According to a specific embodiment of the present invention, a correction mechanism is further included, and the correction mechanism includes:

[0027] a correction roller extending along the width direction;

[0028] Two tapered guide portions, each of the tapered guide portions having a tapered surface, the tapered surfaces of the two tapered guide portions being opposite to each other along the width direction, and each of the tapered surfaces extending obliquely in a direction away from the other tapered guide portion and away from the deviation-correcting roller;

[0029] Along the width direction, the two tapered guide parts define a limiting space, wherein the limiting space is for the paper to pass through, and the tapered guide parts are used to limit the paper within the limiting space along the width direction.

[0030] By adopting the above technical solution, two conical guide parts are provided on the deflection correction roller, and the two conical guide parts define a limit space. The paper passes through the deflection correction roller from the limit space. Therefore, when the paper moves in the width direction to the conical surface that contacts the conical guide part, the conical surface provides a limit effect on the paper and causes the paper to move in the width direction away from the conical surface, thereby preventing the paper from escaping from the limit space in the width direction. As a result, the paper can be effectively prevented from being offset during the winding process, so that the paper roll formed on the paper receiving roller is cylindrical rather than non-cylindrical, which is conducive to the subsequent processing or reuse of the paper roll.

[0031] According to a specific embodiment of the present invention, the punching device further includes:

[0032] punch bracket;

[0033] A support platform, provided on the punching bracket, the support platform being used to support the leather and the paper;

[0034] a punching portion connected to the punching bracket in a manner movable along a height direction, the punching portion being located above the support platform and being arranged opposite to the support platform along the height direction;

[0035] A rotating shaft extending in a width direction, the rotating shaft being provided with an eccentric portion, the axis of the rotating shaft being a first axis, the axis of the eccentric portion being a second axis, the first axis being parallel to and not overlapping the second axis, and when the rotating shaft rotates, the second axis rotates about the first axis;

[0036] a lifting bearing, sleeved on the eccentric portion, wherein the axis of the lifting bearing coincides with the second axis; when the rotating shaft rotates, the lifting bearing drives the punching portion to reciprocate along the height direction; the rotating shaft has a first state and a second state; in the first state, along the height direction, the second axis is located between the first axis and the punching portion; in the second state, along the height direction, the first axis is located between the second axis and the punching portion;

[0037] When the rotating shaft rotates from the second state to the first state and continues to rotate to the second state, the feeding roller drives the leather to move a set distance along the length direction. When the rotating shaft rotates to the second state, the feeding roller stops rotating;

[0038] The length direction, the width direction, and the height direction are perpendicular to each other.

[0039] With this technical solution, the punching unit, the rotating shaft, the eccentric unit, and the lifting bearing cooperate to enable the punching unit to reciprocate vertically when the rotating shaft drives the eccentric unit and the lifting bearing to rotate. Furthermore, during this movement, the feed roller drives the leather to move lengthwise to the punching position. When the punching unit reaches the punching position, the feed roller stops, allowing the punching unit to punch holes in the leather. During this punching process, no manual control is required; once the punching device is turned on, it can automatically and continuously punch holes, effectively improving punching efficiency.

[0040] According to a specific embodiment of the present invention, the punching device further includes:

[0041] The lifting portion is provided at the bottom of the punching portion, the lifting portion is connected to the punching portion, and the lifting bearing is used to abut against the lifting portion.

[0042] According to a specific embodiment of the present invention, the number of the eccentric parts is two;

[0043] The two eccentric parts are provided at both ends of the rotating shaft along the width direction, and the second axes of the two eccentric parts coincide with each other;

[0044] There are two lifting bearings, and each of the two lifting bearings is sleeved on one of the eccentric parts.

[0045] By adopting the above technical solution, eccentric parts are respectively provided at both ends of the rotating shaft, and a lifting bearing is provided at each eccentric part, which can effectively improve the stability of the reciprocating movement of the punching part along the height direction.

[0046] According to a specific embodiment of the present invention, the punching device further includes:

[0047] a fixing plate fixed to the bottom of the punching portion;

[0048] A plurality of punches are fixed to the fixed plate, and the punches are used to punch holes in the leather. The punching portion can drive the plurality of punches to move back and forth along the height direction.

[0049] According to a specific embodiment of the present invention, the diameter of each of the plurality of punches is 0.9 mm-1.1 mm.

[0050] According to a specific embodiment of the present invention, the diameter of each of the plurality of punches is 0.9 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1A side view showing a leather punching device according to an embodiment of the present invention.

[0052] Figure 2 A three-dimensional diagram showing the paper collection mechanism of the leather punching device according to an embodiment of the present invention Figure 1 .

[0053] Figure 3 A three-dimensional diagram showing the paper collection mechanism of the leather punching device according to an embodiment of the present invention Figure 2 .

[0054] Figure 3A A control schematic diagram of the paper collection mechanism of the leather punching device according to an embodiment of the present invention is shown.

[0055] Figure 4 A side view showing a tension adjustment mechanism of a leather punching device according to an embodiment of the present invention.

[0056] Figure 5 A front view of the deviation-correcting mechanism of the leather punching device according to an embodiment of the present invention is shown.

[0057] Figure 6 A three-dimensional view showing a punching device of a leather punching apparatus according to an embodiment of the present invention.

[0058] Figure 7 A side view showing a punching device of a leather punching apparatus according to an embodiment of the present invention.

[0059] Figure 8 A sectional view showing a lifting mechanism of a punching device of a leather punching apparatus according to an embodiment of the present invention.

[0060] Figure 9 A schematic diagram showing the movement of the rotating shaft, lifting bearing and lifting part of the punching device of the leather punching equipment according to an embodiment of the present invention is shown.

[0061] Figure 10 A side view showing a lifting bearing and a lifting portion of a punching device of a leather punching apparatus according to an embodiment of the present invention.

[0062] Figure 11 A bottom view showing a fixing plate and a plurality of punches of a punching device of a leather punching apparatus according to an embodiment of the present invention.

[0063] Figure 12 Show Figure 11 Magnified view at center C.

[0064] Figure 13 A schematic diagram showing a punch of a punching device of a leather punching apparatus according to an embodiment of the present invention punching a hole in leather. DETAILED DESCRIPTION

[0065] The following is an explanation of the embodiments of the present invention by specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiment is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0066] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0067] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0068] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0069] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0070] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0071] refer to Figure 1The present embodiment provides a leather punching device 10. The leather punching device 10 is capable of punching leather 104, thereby forming multiple small holes in the leather 104. This improves the leather's breathability, heat dissipation, and anti-slip properties, effectively enhancing the leather's texture. The perforated leather 104 can be used to make car seats, thereby providing the car seats with functions such as seat heating, seat cooling, and seat ventilation, effectively improving the comfort of the car seats. In addition, the perforated leather 104 can also be used to make steering wheels, thereby providing the steering wheels with a heating function, providing users with a better driving experience in winter or summer.

[0072] To facilitate the description of the leather punching device 10, the length direction X, width direction Y, and height direction Z of the leather punching device 10 are first defined herein. The length direction X, width direction Y, and height direction Z are mutually perpendicular, i.e., the angles between the length direction X and width direction Y, the angles between the width direction Y and height direction Z, and the angles between the length direction X and height direction Z are all 90°. However, this is not limiting. In other possible embodiments, the angles between the length direction X and width direction Y, the angles between the width direction Y and height direction Z, and the angles between the length direction X and height direction Z may also be 89°, 91°, 92°, or the like.

[0073] Continue to refer Figure 1 The leather punching device 10 includes a paper receiving device 100, a leather winding device 200, a punching device 300, a leather unloading device 400, and a paper unloading device 500. The leather unloading device 400 is used to provide unpunched leather 104 to the punching device 300, and the paper unloading device 500 is used to provide paper 102 to the punching device 300. While the punching device 300 is punching the leather 104, the paper 102 is placed underneath the leather 104, protecting the punching tool (not shown) of the punching device 300 and the leather 104 from damage. After the leather 104 is punched, the leather winding device 200 winds up the punched leather 104 to form a leather roll 105, and the paper receiving device 100 winds up the paper 102 to form a paper roll 103.

[0074] In the embodiment of the present application, the paper 102 is specifically corrugated paper, but is not limited thereto. In other possible embodiments, the paper 102 may also be made of other materials that have a certain degree of hardness and can be rolled up to form a paper roll 103. The embodiment of the present application does not impose any particular limitation on the thickness of the paper 102. For example, in some possible embodiments, the thickness of the paper 102 is 0.9 mm. In other possible embodiments, the thickness of the paper 102 may be 1.0 mm, 1.1 mm, or 1.2 mm.

[0075] The paper delivery device 100 will be described in detail below with reference to the accompanying drawings.

[0076] refer to Figures 2 to 3 Combined with Figure 1 , an embodiment of the present application provides a paper receiving device 100, which is used to roll up the punched paper 102.

[0077] It should be noted that, in the embodiment of the present application, the length direction of the paper receiving device 100 is the same as the length direction of the leather punching device 10, both are the length direction X, the width direction of the paper receiving device 100 is the same as the width direction of the leather punching device 10, both are the width direction Y, and the height direction of the paper receiving device 100 is the same as the height direction of the leather punching device 10, both are the height direction Z.

[0078] Illustratively, the paper delivery device 100 includes a feed roller 101, a paper delivery mechanism 110, a speed adjustment mechanism 120, a tension adjustment mechanism 130, a deflection correction mechanism 140, and a controller 150. The controller 150 is connected to the paper delivery mechanism 110, the speed adjustment mechanism 120, the tension adjustment mechanism 130, and the deflection correction mechanism 140, respectively. The feed roller 101 is used to sequentially convey the punched paper 102 to the speed adjustment mechanism 120, the deflection correction mechanism 140, the tension adjustment mechanism 130, and the paper delivery mechanism 110. The paper delivery mechanism 110 is used to wind the punched paper 102 into a paper roll 103. The speed adjustment mechanism 120 is used to adjust the speed at which the paper delivery mechanism 110 winds the paper 102. The deflection correction mechanism 140 is used to adjust the position of the paper 102 along the width direction Y. The tension adjustment mechanism 130 is used to adjust the tension of the paper 102 before it is wound into the paper roll 103.

[0079] Along the width direction Y, a first motor 1011 is provided at the end of the feed roller 101 . The first motor 1011 is connected to the feed roller 101 and can drive the feed roller 101 to rotate so that the feed roller 101 provides paper 102 to the speed adjustment mechanism 120 .

[0080] refer to Figure 2 and Figure 3 The paper delivery mechanism 110 includes a rewinding motor 111, a paper delivery roller 112, a paper delivery support 113, and a speed reducer 115. The paper delivery roller 112 extends along the width direction Y of the paper delivery device 100 and is rotatably connected to the paper delivery support 113. The paper delivery roller 112 is used to receive the paper 102. The rewinding motor 111 is located at one end of the paper delivery roller 112 along the width direction Y and is connected to the paper delivery roller 112 via a speed reducer 115. The rewinding motor 111 can drive the paper delivery roller 112 to rotate, thereby causing the paper delivery roller 112 to receive the paper 102 and wind the paper 102 into a paper roll 103.

[0081] For example, in other possible implementations, the winding motor 111 may be connected to the paper receiving roller 112 without passing through the speed reducer 115 , that is, the output end of the winding motor 111 is directly connected to the paper receiving roller 112 .

[0082] refer to Figure 2 、 Figure 3 and Figure 5 The deflection correction mechanism 140 includes two deflection correction rollers 141, each extending in the width direction Y. The two deflection correction rollers 141 are spaced apart along the length direction X. Along the height direction Z, the two deflection correction rollers 141 are rotatably connected to the bottom of the paper delivery support 113. Each deflection correction roller 141 is provided with two tapered guides 142, spaced apart along the width direction Y.

[0083] Illustratively, each tapered guide portion 142 has a tapered surface 143. Each tapered surface 143 extends obliquely along the width direction Y, away from the other tapered guide portion 142 and away from the deflection correction roller 141. The tapered surfaces 143 of the two tapered guide portions 142 define a limiting space 144 along the width direction Y, through which the paper 102 passes. During the process of rewinding the paper 102 by the paper delivery mechanism 110, the paper 102 passes through the deflection correction roller 141 from the limiting space 144 as it passes through the deflection correction mechanism 140. In other words, along the width direction Y, the two tapered guide portions 142 are located on either side of the paper 102, thereby limiting the paper 102 within the limiting space 144. Specifically, when the paper 102 moves along the width direction Y to the conical surface 143 that contacts the conical guide portion 142, the conical surface 143 provides a limiting effect on the paper 102 and causes the paper 102 to move along the width direction Y in a direction away from the conical surface 143, thereby preventing the paper 102 from escaping from the limiting space 144 along the width direction Y. In this way, the paper 102 can be effectively prevented from being offset during the winding process, so that the paper roll 103 formed on the paper receiving roller 112 is cylindrical rather than non-cylindrical, which is beneficial to the subsequent processing or reuse of the paper roll 103.

[0084] It should be noted that the number of the correcting rollers 141 in the correcting mechanism 140 is not particularly limited in the embodiments of the present application. For example, in some possible implementations, the number of the correcting rollers 141 in the correcting mechanism 140 is one, three, four, or more.

[0085] It can be understood that in the embodiment of the present application, the correction mechanism 140 is set on the paper collection bracket 113, but the embodiment of the present application does not impose any special restrictions on the specific position of the correction mechanism 140. For example, in other possible implementations, the correction mechanism 140 can also be set on a separate correction bracket (not shown in the figure).

[0086] refer to Figures 2 to 4The tension adjustment mechanism 130 is arranged between the paper receiving roller 112 and the feed roller 101. It should be noted that "the tension adjustment mechanism 130 is arranged between the paper receiving roller 112 and the feed roller 101" here means that the paper 102 passes through the feed roller 101 and the tension adjustment mechanism 130 in sequence and is transmitted to the paper receiving roller 112.

[0087] Exemplarily, the tension adjustment mechanism 130 includes a tension adjustment bracket, a friction roller 131, a tension detection roller 132, two clutches 133, and a pulling roller 134. It should be noted that the tension adjustment bracket in the embodiment of the present application is integrally formed with the paper delivery bracket 113. In other words, the friction roller 131, the tension detection roller 132, and the clutch 133 are all provided on the paper delivery bracket 113. However, this is not limiting; in other possible embodiments, the tension adjustment bracket may be independent of the paper delivery bracket 113.

[0088] Specifically, the tension detection roller 132 extends in the width direction Y and is rotatably connected to the paper delivery support 113. The friction roller 131 extends in the width direction Y and is rotatably connected to the paper delivery support 113. Two clutches 133 are fixed to the paper delivery support 113 and are respectively arranged on both sides of the friction roller 131 in the width direction Y. Each clutch 133 can abut against the friction roller 131 to adjust the tightness of the friction roller 131. The traction roller 134 extends in the width direction Y and is rotatably connected to the paper delivery support 113. The paper 102 passes through the tension detection roller 132, the friction roller 131, and the traction roller 134 from the deflection correction mechanism 140 in sequence and is sent to the paper delivery roller 112 via the traction roller 134 for winding.

[0089] For example, in the embodiment of the present application, the friction coefficient of the surface of the friction roller 131 is higher than that of the tension detection roller 132 and the traction roller 134. Due to the higher friction coefficient of the surface of the friction roller 131, the friction roller 131 applies tension to the surface of the paper 102 as the paper 102 passes through the friction roller 131. As a result, the paper roll 103 formed after the paper 102 is wound up by the paper delivery roller 112 is more compact, which is convenient for subsequent processing.

[0090] For example, along the width direction Y, the end portion of the tension detection roller 132 is provided with a tension detection sensor 135 ( Figure 3AAs shown, the tension detection sensor 135 is connected to the controller 150 (for example, by wired or wireless communication), and the tension detection sensor 135 can detect the tension of the paper 102 passing through the tension detection roller 132. The two clutches 133 are connected to the controller 150 (for example, by wired or wireless communication), and the controller 150 can control the clutch 133 to perform PID adjustment on the tightness of the friction roller 131 according to the tension detected by the tension detection sensor 135, thereby adjusting the tension applied by the friction roller 131 to the paper 102.

[0091] Specifically, each clutch 133 includes: a fixing portion 1330, an abutting portion 1331 and a cylinder (not shown in the figure), wherein the fixing portion 1330 is fixed to the paper receiving bracket 113. The abutting portion 1331 is telescopically connected to the fixing portion 1330, and the abutting portion 1331 can abut against the surface of the friction roller 131. The cylinder is used to drive the abutting portion 1331 to retract in a direction away from the friction roller 131 or to extend toward the friction roller 131. It should be noted that the embodiment of the present application drives the abutting portion 1331 by a cylinder, but is not limited to this. In other possible embodiments, the abutting portion 1331 can also be driven by a motor.

[0092] For example, in the embodiment of the present application, the ratio of the tension T applied by the friction roller 131 to the paper 102 to the air pressure P in the cylinder is T / P=10. For example, when the tension T applied by the friction roller 131 to the paper 102 is 100N, the air pressure P in the cylinder is 10 bar. For example, when the tension T applied by the friction roller 131 to the paper 102 is 50N, the air pressure P in the cylinder is 5 bar. For example, when the tension T applied by the friction roller 131 to the paper 102 is 0N, the air pressure P in the cylinder is 0 bar.

[0093] It should be noted that the embodiment of the present application does not impose any special restrictions on the ratio T / P of tension T to air pressure P. In other possible implementations, the ratio T / P of tension T to air pressure P can also be 7, 8, 10 or 11, etc., and can be adaptively adjusted according to actual needs.

[0094] Exemplarily, the surface of the abutting portion 1331 that contacts the friction roller 131 is arc-shaped, so as to better fit and abut against the friction roller 131 .

[0095] Exemplarily, when the tension detection sensor 135 detects that the tension of the paper 102 is greater than a set value (i.e., the set tension), the controller 150 controls the abutting portion 1331 of the clutch 133 to contract in a direction away from the friction roller 131 (but the abutting portion 1331 still abuts against the friction roller 131), thereby reducing the force with which the abutting portion 1331 abuts against the friction roller 131. As a result, the friction roller 131 rotates looser relative to the paper receiving bracket 113, i.e., the friction roller 131 rotates more easily, so that when the paper 102 passes through the friction roller 131, the tension applied to the paper 102 by the friction roller 131 is reduced, thereby avoiding the paper roll 103 formed after the paper 102 is wound up by the paper receiving roller 112 from being too tight, and can effectively prevent the leather from being stretched during the punching process, resulting in product scrapping.

[0096] When the tension detection sensor 135 detects that the tension of the paper is less than the set value (i.e., the set tension), the controller 150 controls the abutting portion 1331 to extend toward the friction roller 131, so that the force with which the abutting portion 1331 abuts against the friction roller 131 increases. As a result, the friction roller 131 rotates tighter relative to the paper receiving bracket 113, i.e., it is more difficult for the friction roller 131 to rotate. As a result, when the paper 102 passes through the friction roller 131, the tension applied to the paper 102 by the friction roller 131 increases, so as to avoid the paper roll 103 formed after the paper 102 is wound up by the paper receiving roller 112 from being too loose, resulting in the roll diameter of the paper roll 103 being too large, and to avoid increasing the frequency of unloading the paper roll, thereby affecting production efficiency.

[0097] refer to Figures 6 to 8 Combined with Figure 1 The leather punching device 10 of the embodiment of the present application further includes a punching device 300, which includes a punching bracket 310, a support platform 320, a punching unit 330, a rotating shaft 340, a lifting mechanism 305, and a feed roller 101. The support platform 320 is disposed on the punching bracket 310. The punching unit 330 is connected to the punching bracket 310 in a movable manner along the height direction Z. Furthermore, the punching unit 330 and the support platform 320 are disposed opposite each other along the height direction Z. Specifically, when the punching unit 330 moves toward the support platform 320 along the height direction Z and punches the leather 104 located above the support platform 320, the support platform 320 can support the paper 102 and the leather 104.

[0098] Exemplarily, along the length direction X, the feed roller 101 is provided on one side of the punching device 300 . The feed roller 101 is an active roller that can drive the punched leather 104 and paper 102 to move along the length direction X to enter the subsequent winding step.

[0099] For example, refer to Figures 8 to 10 Combined with Figure 1 、 Figure 6 and Figure 7 The lifting mechanism 305 is located below the support platform 320 along the height direction Z, and the lifting mechanism 305 includes: a housing 306, a rotating shaft 340, two lifting bearings 342 and two lifting parts 344. The rotating shaft 340, the two lifting bearings 342 and the two lifting parts 344 are located in the housing 306. The rotating shaft 340 extends along the width direction Y. And along the width direction Y, an eccentric part 341 is respectively provided at both ends of the rotating shaft 340. Among them, the axis of the rotating shaft 340 is a first axis (such as Figure 8 As shown by the solid line A), the axis of each eccentric portion 341 is the second axis (as shown in FIG. Figure 8 The second axes B of the two eccentric portions 341 coincide with each other, the first axis A is parallel to the second axis B and does not coincide with each other, and when the rotating shaft 340 rotates, the second axis B rotates around the first axis A.

[0100] It should be noted that the embodiment of the present application does not impose any particular limitation on the number of eccentric portions 341. For example, in other possible embodiments, the number of eccentric portions 341 may be one, three, four, or more. The embodiment of the present application does not impose any particular limitation on the number of lifting bearings 342. For example, in other possible embodiments, the number of lifting bearings 342 may be one, three, four, or more. The embodiment of the present application does not impose any particular limitation on the number of lifting portions 344. For example, in other possible embodiments, the number of lifting portions 344 may be one, three, four, or more.

[0101] Each of the two lifting bearings 342 is mounted on an eccentric portion 341 . The axis of the lifting bearing 342 coincides with the axis of the eccentric portion 341 , and both are second axes B. A lifting portion 344 is positioned above each lifting bearing 342 , and the lifting portion 344 abuts against the lifting bearing 342 . When the rotating shaft 340 rotates, the lifting bearing 342 drives the lifting portion 344 to reciprocate along the height direction Z.

[0102] Specifically, refer to Figure 9 Combined with Figure 1 and Figures 6 to 8 , the rotating shaft 340 has a first state and a second state. Figure 9 As shown, Figure 9 The left side shows a schematic diagram of the rotating shaft 340 in the first state. Figure 9 The middle right side shows a schematic diagram of the rotating shaft 340 in the second state. In the first state, along the height direction Z, the second axis B is located between the first axis A and the lifting portion 344. In the second state, along the height direction Z, the first axis A is located between the second axis B and the lifting portion 344.

[0103] For example, when the rotating shaft 340 drives the lifting bearing 342 to rotate in the clockwise direction R1 from the first state to the second state, the lifting bearing 342 drives the lifting portion 344 to move downward in the height direction Z. When the rotating shaft 340 drives the lifting bearing 342 to rotate in the clockwise direction R1 from the second state to the first state, the lifting bearing 342 drives the lifting portion 344 to move upward in the height direction Z. Thus, when the rotating shaft 340 continues to rotate, the lifting bearing 342 drives the lifting portion 344 to reciprocate in the height direction Z.

[0104] Illustratively, the lifting portion 344 is connected to the piston rod 346 of the punching portion 330 . Thus, when the lifting bearing 342 drives the lifting portion 344 to reciprocate along the height direction Z, the lifting portion 344 can drive the piston rod 346 of the punching portion 330 to reciprocate along the height direction Z. Specifically, there are four piston rods 346 , and the housing 306 is provided with four connecting holes 345 . Each connecting hole 345 allows a piston rod 346 to extend into the housing and connect the piston rod 346 to the lifting portion 344 within the housing 306 .

[0105] It should be noted that the present embodiment does not impose any particular limitation on the number of piston rods 346. For example, in other possible implementations, the number of piston rods 346 may be two, six, or eight. The present embodiment also does not impose any particular limitation on the number of connecting holes 345, but it should be ensured that the number of connecting holes 345 corresponds to the number of piston rods 346.

[0106] For example, refer to Figure 6 and Figure 7 In the embodiment of the present application, the feed roller 101 is driven by a first motor 1011. Specifically, the first motor 1011 drives the feed roller 101 to rotate, thereby driving the leather 104 to move along the length direction X. In the embodiment of the present application, the first motor 1011 drives the feed roller 101 to cause the leather 104 to move in an inch manner. Specifically, "inching" means that the leather 104 moves a set distance along the length direction X, stops moving for a period of time, then moves a set distance again, and then stops moving for a period of time, thereby repeating the above process to achieve inching.

[0107] For example, refer to Figure 9 Combined with Figure 6 and Figure 7When the lifting bearing 342 moves from the second state to the first state and then to the second state again, the first motor 1011 drives the feed roller 101 to move the leather 104 a set distance. When the lifting bearing 342 moves to the second state, the first motor 1011 stops working and stops the leather 104, allowing the punching unit 330 to punch the leather 104. After punching is completed, the lifting bearing 342 continues to move from the second state to the first state and then to the second state again. The first motor 1011 again drives the feed roller 101 to move the leather 104 a set distance.

[0108] It should be noted that the embodiments of the present application do not impose any particular limitation on the set distance. For example, in some possible implementations, the set distance is 14 mm. In other possible implementations, the set distance may be 8 mm, 10 mm, or 12 mm. Accordingly, the embodiments of the present application do not impose any particular limitation on the time it takes for the leather 104 to stop moving. For example, in some possible implementations, the stopping time is 1 second. In other possible implementations, the stopping time may be 2 seconds, 3 seconds, or the like.

[0109] For example, in this embodiment of the present application, the rotating shaft 340, the eccentric portion 341, the lifting bearing 342, and the lifting portion 344 cooperate to rotate the rotating shaft 340, thereby causing the lifting portion 344 to drive the punching unit 330 to reciprocate along the height direction Z. Furthermore, while the lifting bearing 342 moves from the second state to the first state and then to the second state again, the first motor 1011 drives the feed roller 101 to move the leather 104 a set distance. When the lifting bearing 342 moves to the second state, the first motor 1011 stops, stopping the leather 104 so that the punching unit 330 can punch the leather 104. After punching is completed, while the lifting bearing 342 continues to move from the second state to the first state and then to the second state again, the first motor 1011 again drives the feed roller 101 to move the leather 104 a set distance. Thus, continuous punching of the leather 104 can be achieved simply by keeping the rotating shaft 340 and the feed roller 101 operating normally.

[0110] Compared with traditional punching equipment, which requires manual correction of the position and then control of the machine to punch the leather, the punching device 300 of the leather punching equipment 10 provided in the embodiment of the present application does not require manual participation during the punching process, and the punching efficiency is higher.

[0111] Exemplarily, the rotating shaft 340 may be driven by a motor, but is not limited thereto. In other possible implementations, the rotating shaft 340 may also be driven by a belt.

[0112] Illustratively, the punching device 300 of the embodiment of the present application further includes a discharge roller 303 and a second motor 304 . The second motor 304 can drive the discharge roller 303 to rotate to move the unpunched leather 104 to the bottom of the punching unit 330 .

[0113] refer to Figure 11 and Figure 12 Combined with Figure 6 The punching device 300 further includes a fixed plate 350 and a plurality of punches 351. The fixed plate 350 is fixed to the bottom of the punching unit 330, and the plurality of punches 351 are fixed to the side of the fixed plate 350 facing away from the punching unit 330. The punches 351 are used to punch holes in the leather 104. The punching unit 330 is capable of driving the fixed plate 350 and the plurality of punches 351 to reciprocate along the height direction Z.

[0114] For example, in the embodiment of the present application, the maximum diameter D of each of the plurality of punches 351 is 0.9 mm to 1.1 mm (inclusive). Preferably, the maximum diameter D of each of the plurality of punches 351 is 0.9 mm.

[0115] It should be noted that the punch 351 itself is a cutting tool. Along the height direction Z, the diameters of different portions of the punch 351 vary. For example, the diameter of the punch 351 at the end away from the fixing plate 350 is smaller to facilitate penetration of the leather 104. The "maximum diameter" of the punch 351 refers to the maximum diameter D of the punch 351 along the height direction Z. It should be understood that the diameter of the through-hole formed in the leather 104 by the punch 351 is the same as the maximum diameter D of the punch 351.

[0116] It should be noted that the embodiment of the present application does not impose any special restrictions on the maximum diameter of the punch 351, and it can be adaptively adjusted according to the actual needs of the product. For example, in other possible implementations, the maximum diameter D of the punch 351 is 0.95 mm, 0.98 mm or 1.05 mm, etc.

[0117] Continue to refer Figure 11 and Figure 12 , multiple punches 351 are arranged into four groups. Specifically, the multiple punches 351 form a first punch group 352, a second punch group 353, a third punch group 354, and a fourth punch group 355. Along the length direction X, the first punch group 352, the second punch group 353, the third punch group 354, and the fourth punch group 355 are arranged at intervals. Moreover, along the length direction X, the second punch group 353 is located between the first punch group 352 and the third punch group 354, and the third punch group 354 is located between the second punch group 353 and the fourth punch group 355.

[0118] Exemplarily, the first punch group 352 includes a plurality of punches 351, and the plurality of punches 351 of the first punch group 352 are spaced apart along the width direction Y. The second punch group 353 includes a plurality of punches 351, and the plurality of punches 351 of the second punch group 353 are spaced apart along the width direction Y. The third punch group 354 includes a plurality of punches 351, and the plurality of punches 351 of the third punch group 354 are spaced apart along the width direction Y. The fourth punch group 355 includes a plurality of punches 351, and the plurality of punches 351 of the fourth punch group 355 are spaced apart along the width direction Y.

[0119] Illustratively, along the length direction X, each punch 351 in the first punch group 352 is opposite to a punch 351 in the third punch group 354. Along the length direction X, each punch 351 in the second punch group 353 is opposite to a punch 351 in the fourth punch group 355.

[0120] Among them, the distance between the centers of two adjacent punches 351 in the first punch group 352 is the first distance L1, the distance between the centers of two adjacent punches 351 in the second punch group 353 is the first distance L1, the distance between the centers of two adjacent punches 351 in the third punch group 354 is the first distance L1, and the distance between the centers of two adjacent punches 351 in the fourth punch group 355 is the first distance L1.

[0121] The distance between the center of each punch 351 in the first punch group 352 and the center of the corresponding punch 351 in the third punch group 354 is a second distance L2. The distance between the center of each punch 351 in the second punch group 353 and the center of the corresponding punch 351 in the fourth punch group 355 is a second distance L2. The first distance L1 is equal to the second distance L2. The aforementioned set distance is twice the second distance L2.

[0122] Exemplarily, the first spacing L1 and the second spacing L2 range from 4.4 mm to 7.0 mm (inclusive). Preferably, the first spacing L1 and the second spacing L2 are 7.0 mm. In other possible embodiments, the first spacing L1 and the second spacing L2 may also be 5 mm, 6 mm, 6.5 mm, or 6.8 mm, etc.

[0123] In the embodiment of the present application, the first motor 1011 drives the feed roller 101 to move the leather 104 by a set distance of 14 mm, and the second spacing L2 is 7.0 mm. Therefore, along the length direction X, the through holes produced by the plurality of punches 351 on the leather 104 are spaced at the same distance, thereby ensuring the aesthetic appearance of the leather 104.

[0124] Specifically, if Figure 13 As shown, Figure 13In the figure, first through hole 1041a is a through hole created in leather 104 by punch 351 of first punch set 352, second through hole 1041b is a through hole created in leather 104 by punch 351 of second punch set 353, third through hole 1041c is a through hole created in leather 104 by punch 351 of third punch set 354, and fourth through hole 1041d is a through hole created in leather 104 by punch 351 of fourth punch set 355. It will be understood that the distance between the center of first through hole 1041a and the center of third through hole 1041c is a second distance L2. First dotted hole 1041e, second dotted hole 1041f, third dotted hole 1041g, and fourth dotted hole 1041h are areas to be punched. It can be seen that when the feed roller 101 drives the leather to move leftward along the length direction X for a set distance twice the second spacing L2, the first dotted hole 1041e corresponds to the first through hole 1041a, the second dotted hole 1041f corresponds to the second through hole 1041b, the third dotted hole 1041g corresponds to the third through hole 1041c, and the fourth dotted hole 1041h corresponds to the fourth through hole 1041d.

[0125] Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood by those skilled in the art that the above description is provided as a further detailed description of the present invention in conjunction with specific embodiments thereof, and that the specific implementation of the present invention is not limited to these descriptions. Those skilled in the art may make various changes in form and details, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A leather punching device, characterized in that: include: The paper receiving mechanism includes: a paper receiving bracket, a paper receiving roller, and a winding motor; wherein the paper receiving roller is rotatably connected to the paper receiving bracket, the paper receiving roller extends along the width direction of the leather punching device, and is used to receive paper and wind the paper into a paper roll; the winding motor is provided at one end of the paper receiving roller, the winding motor is connected to the paper receiving roller, and the winding motor can drive the paper receiving roller to rotate; a feeding roller extending along the width direction of the leather punching device, the feeding roller being used to convey the paper to the paper receiving roller; Controller; a tension adjustment mechanism, provided between the paper receiving roller and the feeding roller, for adjusting the tension of the paper, comprising: a tension adjustment bracket, a tension detection roller, a friction roller, and a clutch; wherein the tension detection roller extends along the width direction, is rotatably connected to the tension adjustment bracket, is used to receive the paper, and has tension detection sensors provided at both ends of the tension detection roller, which are connected to the controller and are used to detect the tension of the paper; the friction roller extends along the width direction, is rotatably connected to the tension adjustment bracket, is used to receive the paper passing through the tension detection roller and increase the tension of the paper; the clutch is fixed to the tension adjustment bracket, is connected to the controller, and the controller controls the clutch to adjust the tightness of the friction roller according to the tension of the paper; The punching device is arranged on the side of the feeding roller away from the paper receiving mechanism, and the punching device is used to punch holes in the leather; the punching device comprises: a punching bracket, a support platform, a punching part, a rotating shaft and a lifting bearing; wherein, the support platform is arranged on the punching bracket, and the support platform is used to support the leather and the paper; the punching part is connected to the punching bracket in a movable manner along the height direction, the punching part is located above the support platform, and along the height direction, the punching part and the support platform are arranged opposite to each other; the rotating shaft extends along the width direction, and the rotating shaft is provided with an eccentric part, the axis of the rotating shaft is a first axis, and the axis of the eccentric part is a second axis, the first axis is parallel to the second axis and does not overlap, and when the rotating shaft rotates, the second axis rotates around The first axis rotates; the lifting bearing is sleeved on the eccentric part, and the axis of the lifting bearing coincides with the second axis. When the rotating shaft rotates, the lifting bearing drives the punching part to reciprocate along the height direction, and the rotating shaft has a first state and a second state; in the first state, along the height direction, the second axis is located between the first axis and the punching part, and in the second state, along the height direction, the first axis is located between the second axis and the punching part; when the rotating shaft rotates from the second state to the first state and continues to rotate to the second state, the feed roller drives the leather to move a set distance along the length direction, and when the rotating shaft rotates to the second state, the feed roller stops rotating; The length direction, the width direction, and the height direction are perpendicular to each other.

2. The leather punching device according to claim 1, characterized in that: The tension adjustment bracket and the paper receiving bracket are integrally formed.

3. The leather punching device according to claim 1, characterized in that: The clutch comprises: a fixing portion, fixed to the tension adjustment bracket; an abutment portion, telescopically connected to the fixing portion, the abutment portion being capable of abutting against the surface of the friction roller, the abutment portion comprising an arcuate inner surface, the arcuate inner surface being capable of contacting and abutting against the surface of the friction roller; When the tension detection sensor detects that the tension of the paper is greater than a set value, the controller controls the abutment portion to retract in a direction away from the friction roller so that the force with which the abutment portion abuts against the friction roller is reduced. When the tension detection sensor detects that the tension of the paper is less than a set value, the controller controls the abutment portion to extend toward the friction roller so that the force with which the abutment portion abuts against the friction roller is increased.

4. The leather punching device according to claim 1, wherein: It also includes a correction mechanism, which includes: a correction roller extending along the width direction; Two tapered guide portions, each of the tapered guide portions having a tapered surface, the tapered surfaces of the two tapered guide portions being opposite to each other along the width direction, and each of the tapered surfaces extending obliquely in a direction away from the other tapered guide portion and away from the deviation-correcting roller; Along the width direction, the two tapered guide parts define a limiting space, wherein the limiting space is for the paper to pass through, and the tapered guide parts are used to limit the paper within the limiting space along the width direction.

5. The leather punching device according to claim 1, characterized in that: The punching device also includes: The lifting portion is provided at the bottom of the punching portion, the lifting portion is connected to the punching portion, and the lifting bearing is used to abut against the lifting portion.

6. The leather punching device according to claim 1 or 5, characterized in that: The number of the eccentric parts is two; The two eccentric parts are provided at both ends of the rotating shaft along the width direction, and the second axes of the two eccentric parts coincide with each other; There are two lifting bearings, and each of the two lifting bearings is sleeved on one of the eccentric parts.

7. The leather punching device according to claim 1, characterized in that: The punching device also includes: a fixing plate fixed to the bottom of the punching portion; A plurality of punches are fixed to the fixed plate, and the punches are used to punch holes in the leather. The punching portion can drive the plurality of punches to move back and forth along the height direction.

8. The leather punching device according to claim 7, characterized in that: The diameter of each of the plurality of punches is 0.9 mm to 1.1 mm.

9. The leather punching device according to claim 8, characterized in that: Each of the plurality of punches has a diameter of 0.9 mm.

Images