Method and apparatus for folding the end of a hollow braid

Abstract

This invention relates to the technical field of textile processing, and more specifically, to a method and device for inward folding the end of a hollow webbing. The method includes the following steps: S10. At the inward folding station, the front and rear sides of the hollow webbing are clamped and fixed respectively; S20. A punch enters the inside of the hollow webbing for positioning, then the first and second clamping jaw assemblies are released, and the clamping bar assembly clamps the end of the hollow webbing and retracts; S30. The first and second pressing block assemblies move closer to each other until they press against the upper and lower surfaces of the hollow webbing respectively; S40. The end of the hollow webbing is inserted into the inside of the hollow webbing, then the first and second pressing block assemblies are released; S50. The clamping bar assembly moves out of the inside of the hollow webbing, completing the inward folding of the hollow webbing. This invention can accurately and stably fold the end of the webbing inward, with a high processing yield and good processing effect.

Description

Technical Field

[0001] This invention relates to the technical field of textile processing, and more specifically, to a method and device for inward folding the end of a hollow webbing. Background Technology

[0002] Hollow webbing often requires edge trimming at the ends, which is mostly done manually by folding the ends inward, resulting in low efficiency. Existing technology discloses a waist rope end-face inward folding mechanism for a waist rope knotting machine, which automates the inward folding of hollow webbing ends. Specifically, this technology clamps both ends of the cut hollow webbing, using one gripper assembly to grasp the upper layer and another gripper assembly to grasp the lower layer. Both grippers grip along the central axis of the hollow webbing. After gripping, the two gripper assemblies are opened to pull the ends of the hollow webbing apart, while simultaneously folding the folding rod at the webbing end inward towards the inside of the hollow webbing. Although the above-mentioned inward folding method can automate the inward folding of the webbing, it has many shortcomings: (1) The gripper assembly grips the upper and lower surfaces of the webbing along the axial direction of the webbing. Since the upper and lower surfaces are close together before the inward fold is opened, it is very difficult to control the two gripper assemblies to grip only the upper and lower surfaces of the webbing. It is easy to fail to grip accurately or open the end opening of the webbing, which will result in the inward folding operation not being able to proceed smoothly; (2) Using the folding rod to drive the end of the hollow webbing to fold inward, firstly, the end of the folding rod is a tweezer-like pointed structure. When the opening on the upper and lower sides of the webbing is small or the opening is offset, it will be difficult to fold inward smoothly; secondly, the inward folding action is completed by inserting the folding rod into the inside of the webbing. The rough edge folded into the inside of the hollow webbing is not completely smooth, which directly affects the operation of the next sewing process and the appearance of the finished inward folded webbing. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method and device for inward folding the end of a hollow webbing. This method stably presses the upper and lower sides of the end of the hollow webbing, accurately folds the end of the webbing inward, and results in smooth burrs at the folded end of the webbing, high processing yield, and good processing effect.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A method for folding the end of a hollow webbing inward is provided, including the following steps:

[0006] S10. At the inward folding station, the first gripper assembly and the second gripper assembly respectively clamp and fix the front and rear sides of the hollow webbing;

[0007] S20. The clamping bar assembly moves toward the hollow webbing until the punch enters the inside of the hollow webbing for positioning. Then the first clamping jaw assembly and the second clamping jaw assembly are released. The clamping bar assembly clamps the end of the hollow webbing and moves back until the hollow webbing passes between the first pressure block assembly and the second pressure block assembly.

[0008] S30. The first pressing block assembly and the second pressing block assembly approach each other until the first pressing block assembly and the second pressing block assembly are respectively pressed against the upper surface and the lower surface of the hollow webbing;

[0009] S40. The punch of the clamping bar assembly moves into the punching port that matches the shape of the punch formed by the contact between the first pressing block assembly and the second pressing block assembly, inserting the end of the hollow webbing into the inside of the hollow webbing, and then the first pressing block assembly and the second pressing block assembly are released.

[0010] S50. The clamping rod assembly moves out of the inside of the hollow webbing, completing the inward fold of the hollow webbing.

[0011] The hollow webbing end inward folding method of the present invention uses flat, hollow webbing with flat front and rear sides. A first and second gripper assembly clamps these flat front and rear sides, achieving accurate and stable clamping. During the inward folding operation, a first and second pressure block assembly presses down on the upper and lower sides of the hollow webbing end. Compared to clamping along the length direction, this pressing method is more accurate and stable. Before the inward folding operation, a punch first enters the inner side of the hollow webbing for positioning, facilitating accurate and stable clamping of the hollow webbing end and ensuring accurate and stable inward folding. During the inward folding operation, the webbing is folded inward using the cooperation between the punch and the punching port. Therefore, the hollow webbing end inward folding method of the present invention can accurately and stably fold the webbing end, achieving a high processing yield and good processing effect.

[0012] Preferably, before step S20, an opening measure is adopted to separate the upper and lower surfaces of the hollow webbing. The opening measure includes one or a combination of mechanical twisting and air blowing.

[0013] Preferably, in step S40, the insertion action is performed at least twice:

[0014] First insertion: The punch of the clamping bar assembly moves into the punching port that matches the shape of the punch formed by the contact between the first pressure block assembly and the second pressure block assembly, inserting the end of the hollow webbing into the inside of the hollow webbing;

[0015] Second insertion: The first and second pressure block assemblies are released, and the first and second pressure block assemblies move towards the inward folded end face. Then, the first and second pressure block assemblies approach each other and press the inward folded end face of the hollow webbing between the first and second pressure block assemblies. Subsequently, the punch of the clamping bar assembly moves again into the punching port formed between the first and second pressure block assemblies, which matches the shape of the punch, and inserts the end of the hollow webbing deeper into the inner side of the hollow webbing.

[0016] Preferably, in step S40, after the second insertion action, the first straightening is performed:

[0017] After the second insertion action is completed, the first and second pressure block assemblies are released, and the clamping rod assembly moves forward to deliver the hollow webbing to the clamping position of the first and second clamping claw assemblies. The first and second clamping claw assemblies clamp and fix the hollow webbing. The clamping rod assembly retracts until it is completely removed from the hollow webbing. Then, the clamping rod assembly extends again into the inside of the hollow webbing to smooth the rough edges of the inward folded end of the hollow webbing. The stroke of the clamping rod assembly extending again is greater than the length of the inward fold of the hollow webbing.

[0018] Preferably, after the first straightening action, a second straightening action is also included:

[0019] The clamp assembly is equipped with an openable clip. After the first straightening action is completed, the clip opens to straighten the hollow webbing inward folded end a second time.

[0020] Preferably, after the second straightening action, a third straightening action is also included: after completing the second straightening action, the clamp is rotated to straighten the hollow webbing inwardly folded end for the third time.

[0021] The present invention also provides a hollow webbing end inward folding device, including a clamping rod assembly, a first pressing block assembly, a second pressing block assembly, a first gripper assembly, and a second gripper assembly: the clamping rod assembly is connected to a first linear drive assembly, the first linear drive assembly drives the clamping rod assembly to move linearly at least partly inside the hollow webbing; the first pressing block assembly and the second pressing block assembly are respectively located on the upper and lower sides of the hollow webbing, and the first pressing block assembly and / or the second pressing block assembly are connected to the first drive assembly, so that the first pressing block assembly and the second pressing block assembly move closer to or further away from each other; the first gripper assembly and the second gripper assembly are respectively located on the front and rear sides of the hollow webbing, and the first gripper assembly and / or the second gripper assembly are connected to the second drive assembly, so that the first gripper assembly and the second gripper assembly move closer to or further away from each other.

[0022] The hollow webbing end inward folding device of the present invention features a flat hollow webbing with flat front and rear sides. A first gripper assembly and a second gripper assembly clamp the flat front and rear sides, achieving accurate and stable clamping. During the inward folding operation, a first pressure block assembly and a second pressure block assembly press down on the upper and lower sides of the hollow webbing end. Compared to clamping along the length direction, this pressing method is more accurate and stable. Before the inward folding operation, a punch first enters the inner side of the hollow webbing for positioning, facilitating accurate and stable clamping of the hollow webbing end and ensuring accurate and stable inward folding. During the inward folding operation, the webbing is folded inward using the cooperation between the punch and the punching port. Therefore, the hollow webbing end inward folding device of the present invention can accurately and stably fold the webbing end, achieving a high processing yield and good processing effect.

[0023] Furthermore, the clamping rod assembly includes an inner folding rod, a sleeve, and a clamp. The punch is located at the end of the inner folding rod. The sleeve is connected to a second linear drive assembly and is slidably sleeved on the outer periphery of the inner folding rod. The second linear drive assembly is mounted on a fixed plate. One end of the clamp is connected to the inner folding rod. When the second drive assembly drives the sleeve to move, the other end of the clamp can swing around its connection point with the inner folding rod and at least partially extend into the sleeve to clamp the hollow webbing end face. The output end of the first linear drive assembly is connected to the fixed plate.

[0024] Furthermore, the inner folding rod has a ventilation channel that can be connected to an external air source, and the end of the inner folding rod has an air blowing hole for blowing air into the hollow webbing. The ventilation channel is connected to the air blowing hole.

[0025] Furthermore, both sides of the inner folding rod facing the first gripper assembly and the second gripper assembly are configured as gripping planes.

[0026] Furthermore, the inner folding rod is connected to a third linear drive assembly, which is mounted on a fixed plate.

[0027] Furthermore, it also includes a rotary drive assembly, which is mounted on the output end of the first linear drive assembly, and the output end of the rotary drive assembly is connected to the fixed plate.

[0028] Furthermore, the first pressing block assembly includes a first mounting block and a first pressing block slidably mounted on the first mounting block, and the second pressing block assembly includes a second mounting block and a second pressing block slidably mounted on the second mounting block. The first mounting block is provided with a first positioning component for defining the position of the first pressing block, and the second mounting block is provided with a second positioning component for defining the position of the second pressing block.

[0029] Furthermore, the sides of the first and second pressing blocks that are close to each other are the first arc surface and the second arc surface, respectively. The first arc surface and the second arc surface contact to form a punching port whose opening size gradually decreases from one end of the first pressing block to the other end. The punch is a conical structure whose size gradually decreases from one end to the other end.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] The hollow webbing end inward folding method and inward folding device of the present invention can achieve accurate and stable clamping of hollow webbing; before the inward folding operation, the punch first enters the inner side of the hollow webbing for positioning, which facilitates accurate and stable clamping of the hollow webbing end and facilitates accurate and stable inward folding; during the inward folding operation, the inward folding of the webbing is achieved by the cooperation between the punch and the punching port; thus, the inward folding of the webbing end is accurate and stable, resulting in a high processing yield;

[0032] The hollow webbing end inward folding method and inward folding device of the present invention, after completing the inward folding action, performs one or at least two smoothing actions, including a first smoothing, a second smoothing, and a third smoothing. It is applicable to the smoothing of the inward folded end and the rough edge of hollow webbing of various materials, which can effectively ensure the smooth progress of the sewing process and the aesthetic appearance of the finished product, resulting in good processing effect. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the method for folding the ends of hollow webbing inwards.

[0034] Figure 2 A schematic diagram illustrating the specific steps of step S40 in the hollow webbing end inward folding method;

[0035] Figure 3 This is a schematic diagram of the hollow webbing end inward folding device.

[0036] Figure 4 This is a structural schematic diagram of the first drive assembly, the first pressing block assembly, and the second pressing block assembly;

[0037] Figure 5 A schematic diagram showing the material inlet formed by the first and second pressing assemblies;

[0038] Figure 6 This is a structural schematic diagram of the first or second pressing block assembly;

[0039] Figure 7 This is a schematic diagram showing the installation of the clamping rod assembly with the first linear drive mechanism, the second linear drive mechanism, the third linear drive mechanism, and the rotary drive assembly.

[0040] Figure 8 This is a schematic diagram of the clamping rod assembly;

[0041] Figure 9 This is a partial structural diagram of the clamping rod assembly;

[0042] Figure 10 This is a schematic diagram of the installation of the sleeve and the second linear drive assembly;

[0043] Figure 11 This is a schematic diagram showing the installation of the inner folding rod and the third linear drive assembly;

[0044] Figure 12 This is a schematic diagram showing the installation of the second drive assembly, the first gripper assembly, and the second gripper assembly.

[0045] In the attached diagram: 100, clamping rod assembly; 101, punch; 102, inner folding rod; 103, sleeve; 104, clamp; 105, air passage; 106, air blowing hole; 107, clamping plane; 200, first pressure block assembly; 210, first mounting block; 220, first pressure block; 230, first slide groove; 240, first guide plate; 250, first connecting rod; 300, second pressure block assembly; 310, second mounting... 320. Second pressing block; 330. Second slide rail; 340. Second guide plate; 350. Second connecting rod; 400. First gripper assembly; 410. First gripper; 500. Second gripper assembly; 510. Second gripper; 600. First linear drive assembly; 700. First drive assembly; 701. First motor; 702. First screw; 703. First nut; 704. Second nut; 705. First... Limiting groove; 706, second limiting groove; 707, first limiting block; 800, second drive assembly; 801, second motor; 802, second screw; 803, third nut; 804, fourth nut; 805, third limiting groove; 806, fourth limiting groove; 808, second limiting block; 900, punching port; 110, second linear drive assembly; 111, second cylinder; 112, second connecting plate; 113, second guide rail; 114, second slider; 120, fixing plate; 130, third linear drive assembly; 131, third cylinder; 132, third connecting plate; 133, third guide rail; 134, third slider; 140, rotary drive assembly; 150, third drive assembly; 151, third mounting plate; 152, third drive cylinder; 160, fourth drive assembly; 161, fourth mounting plate; 162, fourth drive cylinder. Detailed Implementation

[0046] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0047] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, 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, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0048] Example 1

[0049] like Figure 1 As shown, this embodiment is a method for inward folding of the end of a hollow webbing, including the following steps:

[0050] S10. At the inward folding station, the first gripper assembly 400 and the second gripper assembly 500 respectively clamp and fix the front and rear sides of the hollow webbing;

[0051] S20. The clamping bar assembly 100 moves toward the hollow webbing until the punch 101 enters the inside of the hollow webbing for positioning. Then the first clamping jaw assembly 400 and the second clamping jaw assembly 500 are released. The clamping bar assembly 100 clamps the end of the hollow webbing and moves back until the hollow webbing passes between the first pressure block assembly 200 and the second pressure block assembly 300.

[0052] S30. The first pressing block assembly 200 and the second pressing block assembly 300 approach each other until the first pressing block assembly 200 and the second pressing block assembly 300 are respectively pressed against the upper surface and the lower surface of the hollow webbing;

[0053] S40. The punch 101 of the clamping bar assembly 100 moves into the punching port 900 formed between the first pressing block assembly 200 and the second pressing block assembly 300, which matches the shape of the punch 101, and inserts the end of the hollow webbing into the inside of the hollow webbing. Then the first pressing block assembly 200 and the second pressing block assembly 300 are released.

[0054] S50. The clamping rod assembly 100 moves out of the inside of the hollow webbing to complete the inward fold of the hollow webbing.

[0055] In this embodiment, the front and back are the transport directions of the hollow webbing, i.e. Figure 1 The X direction in the middle; left and right are... Figure 1 The Y direction; up and down are Figure 1 The Z-direction in the middle.

[0056] After the above steps, the front and rear sides of the flat hollow webbing are flat. The first gripper assembly 400 and the second gripper assembly 500 clamp the flat front and rear sides, achieving accurate and stable clamping. During the inward folding operation of the clamping rod assembly 100, the first pressure block assembly 200 and the second pressure block assembly 300 press down on the upper and lower sides of the hollow webbing end. Compared to clamping along the length direction of the upper and lower sides, the pressing method is more accurate and stable. Before the inward folding operation, the punch 101 first enters the inner side of the hollow webbing for positioning, facilitating accurate and stable clamping of the hollow webbing end and ensuring accurate and stable inward folding. During the inward folding operation, the cooperation between the punch 101 and the punching port 900 achieves the inward folding of the webbing. Therefore, the method of this embodiment can accurately and stably fold the webbing end inward, achieving a high processing yield and good processing effect.

[0057] Before step S20, an opening mechanism is used to separate the upper and lower surfaces of the hollow webbing end. This opening mechanism includes one or a combination of mechanical twisting and air blowing. In step S20, the clamping rod assembly 100 moves towards the hollow webbing until the punch 101 enters the inner side of the hollow webbing for positioning. Before step S20, separating the upper and lower surfaces of the hollow webbing end facilitates the entry of the punch 101 into the hollow webbing. In this embodiment, mechanical twisting can be used to achieve the separation of the upper and lower ends. With this method, after the clamping rod assembly 100 clamps the end of the hollow webbing, a clamping plate or other measures are needed to quickly clamp the hollow webbing to restore the misaligned upper and lower surfaces to their original positions as much as possible.

[0058] In step S40, the insertion action is performed at least twice:

[0059] First insertion: The punch 101 of the clamping bar assembly 100 moves into the punching port 900 formed between the first pressing block assembly 200 and the second pressing block assembly 300, which matches the shape of the punch 101, and inserts the end of the hollow webbing into the inside of the hollow webbing.

[0060] Second insertion: The first pressing block assembly 200 and the second pressing block assembly 300 are released, and the first pressing block assembly 200 and the second pressing block assembly 300 move towards the inward folded end face. Then the first pressing block assembly 200 and the second pressing block assembly 300 approach each other and press the inward folded end face of the hollow webbing between the first pressing block assembly 200 and the second pressing block assembly 300. Subsequently, the punch 101 of the clamping bar assembly 100 moves again into the punching port 900 formed between the first pressing block assembly 200 and the second pressing block assembly 300, which matches the shape of the punch 101, and inserts the end of the hollow webbing into the deeper inner side of the hollow webbing.

[0061] During the first and second insertion processes, the clamping rod assembly 100 always clamps the end of the webbing.

[0062] Setting up a first and second insertion allows for a longer insertion length into the inner side of the webbing, even when the dimensions of the first pressure block assembly 200, the second pressure block assembly 300, and the punch 101 are limited. During the inward folding operation, the first pressure block assembly 200 and the second pressure block assembly 300 are pressed against the upper and lower sides of the hollow webbing, but not too tightly, to avoid hindering the inward folding. The pressing force of the first pressure block assembly 200 and the second pressure block assembly 300 is sufficient to prevent the webbing from shifting position when the end is inserted into the inner side of the webbing.

[0063] Example 2

[0064] This embodiment is similar to Embodiment 1, except that in step S40, as follows: Figure 2 As shown, after the second insertion, the first smoothing is performed:

[0065] After the second insertion action is completed, the first pressing block assembly 200 and the second pressing block assembly 300 are released, and the clamping rod assembly 100 moves forward to deliver the hollow webbing to the clamping position of the first clamping claw assembly 400 and the second clamping claw assembly 500. The first clamping claw assembly 400 and the second clamping claw assembly 500 clamp and fix the hollow webbing. The clamping rod assembly 100 retracts until it is completely withdrawn from the hollow webbing, and then the clamping rod assembly 100 extends again into the inside of the hollow webbing to smooth the rough edges of the inward folded end of the hollow webbing. The stroke of the clamping rod assembly 100 extending again is greater than the length of the inward fold of the hollow webbing. In this embodiment, when the first clamping claw assembly 400 and the second clamping claw assembly 500 are clamping the webbing, in order to achieve a better inward folding and smoothing effect, the distance between the first clamping claw assembly 400 and the second clamping claw assembly 500 is increased to stretch the hollow webbing.

[0066] When the clamping rod assembly 100 of this embodiment is equipped with an openable clamp 104, the clamping and releasing of the webbing is achieved by opening and closing the clamp 104. Specifically, before the clamping rod assembly 100 retracts, the clamp 104 is opened to release the end of the webbing. Then, the clamp 104 retracts in an open position until it is completely removed from the hollow webbing. After the clamp 104 closes, the clamping rod assembly 100 re-enters the inside of the hollow webbing to smooth the rough edges at the folded end. At this time, the re-entry stroke of the clamping rod assembly 100 is greater than the length of the folded hollow webbing. This not only smooths the folded webbing but also the rough edges at the end of the webbing, preventing the accumulation of rough edges from affecting the webbing processing effect.

[0067] Example 3

[0068] This embodiment is similar to Embodiment 2, except that after the first smoothing action, a second smoothing action is included, such as... Figure 2 As shown, the clamp assembly 100 is equipped with an openable clamp 104. After the first straightening action is completed, the clamp 104 opens, straightening the inwardly folded end of the hollow webbing a second time. During the opening process of the clamp 104, both the inner and outer layers of hollow webbing are stretched under the expansion action of the clamp 104. This stretching process can further smooth the inwardly folded webbing and the raw edges of the webbing to a certain extent, achieving a better smoothing effect. This embodiment is particularly suitable for processing webbing with harder and more rigid materials.

[0069] Example 4

[0070] This embodiment is similar to Embodiment 3, except that after the second straightening action, a third straightening action is included, such as... Figure 2 As shown: After completing the second straightening action, rotate the clamp 104 to straighten the hollow webbing's inward folded end for the third time. With a full rotation of the clamp 104, the inward folded webbing achieves excellent smoothness throughout, even with softer webbing. Furthermore, if the clamp 104 has not yet reached the rough edge position by the end of the second straightening action, it can be moved to its maximum opening position to the corresponding rough edge position before rotating again, thus achieving the desired smoothness.

[0071] Example 5

[0072] like Figure 3The embodiment shown is an inward folding device for the end of a hollow webbing, including a clamping rod assembly 100, a first pressure block assembly 200, a second pressure block assembly 300, a first gripper assembly 400, and a second gripper assembly 500. The clamping rod assembly 100 is connected to a first linear drive assembly 600, which drives the clamping rod assembly 100 to move linearly at least partially inside the hollow webbing. The first pressure block assembly 200 and the second pressure block assembly 300 are located on the upper and lower sides of the hollow webbing, respectively, and the first pressure block assembly 200 and / or the second pressure block assembly 300 are connected to the first drive assembly 600. The first pressing block assembly 200 and the second pressing block assembly 300 are connected to each other, so that the first gripper assembly 400 and the second gripper assembly 500 are close to or far away from each other; the first gripper assembly 400 and the second gripper assembly 500 are respectively located on the front and rear sides of the hollow webbing, and the first gripper assembly 400 and / or the second gripper assembly 500 are connected to the second drive assembly 800, so that the first gripper assembly 400 and the second gripper assembly 500 are close to or far away from each other; the first pressing block assembly 200 and the second pressing block assembly 300 can contact each other to form a punching port 900, and the clamping bar assembly 100 is provided with a punch 101 that cooperates with the punching port 900.

[0073] In this embodiment, the hollow webbing end inward folding device uses flat sides on the front and rear sides of the flat hollow webbing. The first gripper assembly 400 and the second gripper assembly 500 clamp these flat sides, achieving accurate and stable clamping. During the inward folding operation, the first pressure block assembly 200 and the second pressure block assembly 300 press down on the upper and lower sides of the hollow webbing end. Compared to clamping along the length direction, this pressing method is more accurate and stable. Before the inward folding operation, the punch 101 first enters the inner side of the hollow webbing for positioning, facilitating accurate and stable clamping of the hollow webbing end and ensuring accurate and stable inward folding. During the inward folding operation, the cooperation between the punch 101 and the punching port 900 achieves the inward folding of the webbing. Therefore, the hollow webbing end inward folding device of this invention can accurately and stably fold the webbing end, achieving a high processing yield and good processing effect.

[0074] The clamping rod assembly 100 includes an inner folding rod 102, a sleeve 103, and a clamp 104. A punch 101 is located at the end of the inner folding rod 102. The sleeve 103 is connected to a second linear drive assembly 110 and is slidably sleeved on the outer periphery of the inner folding rod 102. The second linear drive assembly 110 is mounted on a fixing plate 120. One end of the clamp 104 is connected to the inner folding rod 102. When the second linear drive assembly 110 drives the sleeve 103 to move, the other end of the clamp 104 can swing around its connection point with the inner folding rod 102, at least partially extending into the sleeve 103 and clamping the hollow webbing end face. The output end of the first linear drive assembly 600 is connected to the fixing plate 120. In this embodiment, the clamp 104 can be configured as a spring clip, such as... Figures 7 to 9As shown. In this embodiment, the first linear drive assembly operates, driving the clamping rod assembly 100 to move left and right as a whole, so that the punch 101 first enters the inner side of the hollow webbing for positioning; the second linear drive assembly 110 operates, driving the sleeve 103 to move axially along the inner folding rod 102, the sleeve 103 presses the clamp 104, so that the other end of the clamp 104 swings around its connection point with the inner folding rod 102 and at least partially extends into the sleeve 103 to clamp the end face of the hollow webbing; when it is necessary to release the end of the hollow webbing, the second linear drive assembly 110 operates to drive the sleeve 103 to move in the opposite direction, the clamp 104 opens, and at the same time, it plays a smoothing role for the webbing and rough edges at the stretched part of the clamp 104.

[0075] The inner folding rod 102 has a ventilation channel 105 that can be connected to an external air source, and an air blowing hole 106 for blowing air into the hollow webbing is provided at the end of the inner folding rod 102. The ventilation channel 105 is connected to the air blowing hole 106. Figure 9 As shown. The two sides of the inner folding rod 102 facing the first gripper assembly 400 and the second gripper assembly 500 are both configured as gripping planes 107, as... Figure 8 As shown. Specifically, the air blowing hole 106 can be located on the center line of the punch 101 or on the side of the punch 101. In practice, after the punch 101 is inserted into the hollow webbing, gas is introduced into the air passage 105 using an external air source. The introduced gas is blown out from the air blowing hole 106 on the punch 101, blowing the hollow webbing into a tubular shape, which facilitates the inward folding of the ends of the hollow webbing. When the clamping bar assembly 100 is in the initial state, the two clamping planes 107 of the clamping bar assembly 100 are respectively facing the first clamping claw assembly 400 and the second clamping claw assembly 500. This orientation design facilitates the clamping of the hollow webbing by the first clamping claw assembly 400 and the second clamping claw assembly 500.

[0076] The first pressing block assembly 200 includes a first mounting block 210 and a first pressing block 220 slidably mounted on the first mounting block 210. The second pressing block assembly 300 includes a second mounting block 310 and a second pressing block 320 slidably mounted on the second mounting block 310. The first mounting block 210 is provided with a first positioning component for defining the position of the first pressing block 220, and the second mounting block 310 is provided with a second positioning component for defining the position of the second pressing block 320. Figures 5 to 6 As shown. The sides of the first pressing block 220 and the second pressing block 320 that are close to each other are the first arc surface and the second arc surface, respectively. The first arc surface and the second arc surface contact to form a punching port 900 whose opening size gradually decreases from one end of the first pressing block 220 to the other end. The punch 101 is a conical structure whose size gradually decreases from one end to the other end.

[0077] In this embodiment, the first pressing block 220 and the second pressing block 320 are silicone blocks, which are easily worn parts. The first pressing block 220 and the second pressing block 320 are slidably installed with the first mounting block 210 and the second mounting block 310, respectively. Specifically, the inner bottom of the first mounting block 210 and the second mounting block 310 are respectively provided with a first sliding groove 230 and a second sliding groove 330. The bottom of the first pressing block 220 and the second pressing block 320 are respectively connected to a first guide plate 240 and a second guide plate 340. The first guide plate 240 and the second guide plate 340 slide in the first sliding groove 230 and the second sliding groove 330, respectively. When the first guide plate 240 and the second guide plate 340 are completely slid into the first sliding groove 230 and the second sliding groove 330, the first positioning component and the second positioning component pop out to position the first guide plate 240 and the second guide plate 340. Figure 6 As shown. The first positioning component and the second positioning component have the same structure, both being spring-bead structures, including a spring and a glass bead. Both the first mounting block 210 and the second mounting block 310 have mounting holes. The spring is connected between the bottom wall of the mounting hole and the glass bead. The spring is located inside the mounting hole. When the glass bead is squeezed, it retracts into the mounting hole. When the squeezing force is released, the spring force is restored, and the glass bead pops out to play a role in limiting and positioning.

[0078] Example 6

[0079] This embodiment is similar to Embodiment 5, except that the inner folding rod 102 is connected to a third linear drive assembly 130, which is mounted on the fixing plate 120. The overall linear motion of the clamping rod assembly 100 is driven by the first linear drive assembly, the linear motion of the sleeve 103 is driven by the second linear drive assembly 110, and the linear motion of the inner folding rod 102 is driven by the third linear drive assembly 130. In this embodiment, the first linear drive assembly is a ball screw linear module with a slider. The second linear drive assembly 110 and the third linear drive assembly 130 can each be driven by a cylinder, which is fixed to different sides of the fixing plate 120. Figure 7 shown. Specifically:

[0080] like Figure 8 As shown, the second linear drive assembly 110 includes a second cylinder 111 and a second connecting plate 112. The cylinder body of the second cylinder 111 is fixed to the fixed plate 120, and the piston rod and sleeve 103 of the second cylinder 111 are respectively fixedly connected to the first connecting plate. To ensure the smooth driving of the sleeve 103, this embodiment also includes a second guide assembly. The second guide assembly includes a second guide rail 113 and a second slider 114 that are slidably connected. The second slider 114 is fixed to the fixed plate 120, and the second guide rail 113 is fixed to the first connecting plate. The first guide rail is parallel to the central axis of the sleeve 103.

[0081] like Figure 9As shown, the third linear drive assembly 130 includes a third cylinder 131 and a third connecting plate 132. The cylinder body of the third cylinder 131 is fixed to the fixed plate 120, and the piston rod and the inner bending rod 102 of the third cylinder 131 are fixedly connected to the third connecting plate 132. To ensure the smooth driving of the inner bending rod 102, this embodiment also includes a third guide assembly. The third guide assembly includes a third guide rail 133 and a third slider 134 that are slidably connected. The third slider 134 is fixed to the third connecting plate 132, and the third guide rail 133 is fixed to the fixed plate 120. The third guide rail 133 is parallel to the central axis of the inner bending rod 102.

[0082] In practice, the second linear drive assembly 110 drives the sleeve 103 to move linearly, or the third linear drive assembly 130 drives the inner folding rod 102 to move linearly, controlling the relative displacement between the inner folding rod 102 and the sleeve 103, thereby realizing the opening and closing of the clamp 104. Of course, the opening and closing of the clamp 104 can be controlled only by the second linear drive assembly 110, while the third linear drive assembly 130 controls the position where the clamp 104 on the inner folding rod 102 can penetrate into the inner side of the webbing. In addition, the linear movement of the clamping rod assembly 100 as a whole is controlled by a ball screw linear module. When the clamping rod assembly 100 moves as a whole, the punch 101 can enter the inner side of the hollow webbing to play a positioning role.

[0083] Example 7

[0084] This embodiment is similar to Embodiment 5, except that it also includes a rotary drive assembly 140. The rotary drive assembly 140 is mounted on the output end of the first linear drive assembly, that is, the rotary drive assembly 140 is mounted on the slider, and the output end of the rotary drive assembly 140 is connected to the fixing plate 120. The rotary assembly can drive the clamping rod assembly 100 to rotate at least partially within the hollow webbing. Figure 7 As shown.

[0085] During implementation, the first linear drive assembly drives the clamping rod assembly 100 forward to the punch 101, which enters the inner side of the hollow webbing for positioning. The second linear drive assembly 110 drives the sleeve 103 to move, and the clamp 104 clamps the end of the webbing between the clamp 104 and the inward folding rod 102. The first linear drive assembly drives the clamping rod assembly 100 to move inward, realizing the inward folding of the webbing. The second linear drive assembly drives the sleeve 103 to move, and the clamp 104 opens, thereby releasing the clamp on the webbing. The first linear drive assembly drives the clamping rod assembly 100 to retract, and the second linear drive assembly 110 controls the sleeve... The movement of cylinder 103 causes clamp 104 to close. The first linear drive assembly then drives clamping rod assembly 100 to extend into the webbing and smooth the inward fold. Then, while the first linear drive assembly controls clamping rod assembly 100 to retract, the second linear drive assembly 110 drives sleeve 103 to open clamp 104. At this point, clamp 104 stretches the end of the inward folded webbing. Then, the third linear drive assembly 130 controls the inward folding rod 102 to move until clamp 104 reaches a suitable rotational position. Afterward, rotation drive assembly 140 controls clamp 104 to begin rotating, further smoothing the inward folded webbing and rough edges. After the inward folding and smoothing actions are completed, the first linear drive assembly controls clamping rod assembly 100 to retract to its initial position.

[0086] Example 8

[0087] This embodiment is similar to Embodiment 5, except that the first drive assembly 700 is a lead screw and nut structure, as shown below. Figure 4 As shown, specifically:

[0088] The first drive assembly 700 includes a first motor 701, a first screw 702, a first nut 703, and a second nut 704. The first screw 702 is connected to the output shaft of the first motor 701. The first screw 702 has a first thread and a second thread with opposite helical directions. The first nut 703 is threadedly connected to the first thread, and the second nut 704 is threadedly connected to the second thread. The two ends of the first screw 702 are rotatably mounted on a first mounting plate via bearings. A first pressure block assembly 200 is connected to the first nut 703 via a first connecting rod 250, and a second pressure block assembly 300 is connected to the second nut 704 via a second connecting rod. The first nut 703 and the second nut 704 are not standard nut structures, but rather slider structures with internal threads. Additionally, the first connecting rod 350 has a first limiting groove 705, the second connecting rod 350 has a second limiting groove 706, and a first limiting block 707 is provided on the first mounting plate. The first limiting groove 705 and the second limiting groove 706 are slidably connected to the first limiting block 707. With this configuration, when the first motor 701 is working, the first screw 702 rotates, and the first nut 703 and the second nut 704 drive the first pressing block assembly 200 and the second pressing block assembly 300 to move closer to or further away from each other. A single drive can realize the movement of the first pressing block assembly 200 and the second pressing block assembly 300, making control simple. Furthermore, the arrangement of the first and second threads can be used to allow the first pressing block assembly 200 and the second pressing block assembly 300 to move closer to or further away from each other at the same speed along the axis of symmetry of the first pressing block 220 and the second pressing block 320.

[0089] In addition, in this embodiment, the first pressing block assembly 200 and the second pressing block assembly 300 can move left and right in addition to moving up and down. The left and right movement of the first pressing block assembly 200 is controlled by the third driving assembly 150, and the left and right movement of the second pressing block assembly 300 is controlled by the fourth driving assembly 160. Specifically, the third driving assembly 150 includes a third mounting plate 151 and a third driving cylinder 152. The third mounting plate 151 and the first mounting block 210 are slidably connected. The cylinder body of the third driving cylinder 152 is mounted on the third mounting plate 151, and the piston rod of the third driving cylinder 152 is mounted on the first mounting block 210. To ensure the smooth movement of the first pressing block assembly 200, a guide assembly can be provided between the first mounting block 210 and the third mounting plate 151. The guide assembly can adopt a slider rail structure. The fourth drive assembly 160 includes a fourth mounting plate 161 and a fourth drive cylinder 162. The fourth mounting plate 161 and the second mounting block 310 are slidably connected. The cylinder body of the fourth drive cylinder 162 is mounted on the fourth mounting plate 161, and the piston rod of the fourth drive cylinder 162 is mounted on the second mounting block 310. To ensure the smooth movement of the second pressure block assembly 300, a guide assembly can be provided between the second mounting block 310 and the fourth mounting plate 161. The guide assembly can adopt a slider slide rail structure.

[0090] Example 9

[0091] This embodiment is similar to Embodiment 5, except that the second drive assembly 800 is a lead screw and nut structure, as shown below. Figure 12 As shown, specifically:

[0092] The second drive assembly 800 includes a second motor 801, a second screw 802, a third nut 803, and a fourth nut 804. The second screw 802 is connected to the output shaft of the second motor 801. The second screw 802 has a third thread and a fourth thread with opposite helical directions. The third nut 803 is threadedly connected to the third thread, and the fourth nut 804 is threadedly connected to the fourth thread. Both ends of the second screw 802 are rotatably mounted on a second mounting plate via bearings. A first gripper assembly 400 is mounted on the third nut 803, and a second gripper assembly 500 is mounted on the fourth nut 804. The third nut 803 and the fourth nut 804 are not standard nut structures, but rather sliding block structures with internal threads. Furthermore, the third nut 803 has a third limiting groove 805, and the fourth nut 804 has a fourth limiting groove 806. A second limiting block 808 is provided on the second mounting plate, and the third limiting groove 805 and the fourth limiting groove 806 are slidably connected to the second limiting block 808. With this configuration, when the second motor 801 is working, the second screw 802 rotates, and the third nut 803 and the fourth nut 804 drive the first gripper assembly 400 and the second gripper assembly 500 to move closer to or further away from each other. A single drive can realize the movement of the first gripper assembly 400 and the second gripper assembly 500, making control simple. Furthermore, the third and fourth threads can be used to allow the first gripper assembly 400 and the second gripper assembly 500 to move closer to or further away from each other at the same speed along their symmetrical axis. This allows for the gripping of webbing of different widths and also enables the stretching of hollow webbing when gripping it.

[0093] In this embodiment, the first gripper assembly 400 and the second gripper assembly 500 are respectively a first gripper 410 cylinder with a first gripper 410 and a second gripper 510 cylinder with a second gripper 510. The first gripper 410 and the second gripper 510 are symmetrically arranged and can move closer to or further away from each other. The first gripper 410 and the second gripper 510 are not straight structures, but rather curved structures including near-90° bends. Thus, the first gripper 410 and the second gripper 510 can conveniently and accurately clamp the front and rear sides of the hollow webbing.

[0094] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0095] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A hollow webbing end inward folding device, characterized in that, The device includes a clamping rod assembly (100), a first pressure block assembly (200), a second pressure block assembly (300), a first gripper assembly (400), and a second gripper assembly (500). The clamping rod assembly (100) is connected to a first linear drive assembly (600), which drives the clamping rod assembly (100) to move linearly at least partially inside the hollow webbing. The first pressure block assembly (200) and the second pressure block assembly (300) are located on the upper and lower sides of the hollow webbing, respectively, and the first pressure block assembly (200) and / or the second pressure block assembly (300) are connected to a first drive assembly (700), causing the first pressure block assembly (200) and the second pressure block assembly (300) to move closer to or further away from each other. The first gripper assembly (400) and the second gripper assembly (500) are located on the upper and lower sides of the hollow webbing, respectively. The front and rear sides of the hollow webbing, and the first gripper assembly (400) and / or the second gripper assembly (500) are connected to the second drive assembly (800) so that the first gripper assembly (400) and the second gripper assembly (500) are close to or far from each other; the first pressure block assembly (200) and the second pressure block assembly (300) can contact each other to form a punching port (900), the clamping bar assembly (100) includes a punch (101), an inner folding bar (102) and a clamp (104) that cooperate with the punching port (900), the punch (101) is located at the end of the inner folding bar (102), one end of the clamp (104) is connected to the inner folding bar (102), and the other end of the clamp (104) swings around its connection point with the inner folding bar (102) to clamp the end face of the hollow webbing.

2. The hollow webbing end inward folding device according to claim 1, characterized in that, The clamping rod assembly (100) further includes a sleeve (103), which is connected to a second linear drive assembly (110) and is slidably sleeved on the outer periphery of the inner folding rod (102). The second linear drive assembly (110) is mounted on a fixing plate (120). When the second drive assembly (800) drives the sleeve (103) to move, the other end of the clamp (104) can swing around its connection point with the inner folding rod (102) and at least partially extend into the sleeve (103) to clamp the hollow webbing end face. The output end of the first linear drive assembly (600) is connected to the fixing plate (120).

3. The hollow webbing end inward folding device according to claim 2, characterized in that, The inner folding rod (102) has an air passage (105) that can be connected to an external air source, and the end of the inner folding rod (102) has an air blowing hole (106) for blowing air into the hollow webbing. The air passage (105) is connected to the air blowing hole (106).

4. The hollow webbing end inward folding device according to claim 2, characterized in that, The inner folding rod (102) is configured with gripping planes (107) on both sides facing the first gripper assembly (400) and the second gripper assembly (500).

5. The hollow webbing end inward folding device according to claim 2, characterized in that, The inner folding rod (102) is connected to a third linear drive assembly (130), which is mounted on a fixed plate (120).

6. The hollow webbing end inward folding device according to claim 2, characterized in that, It also includes a rotary drive assembly (140), which is mounted on the output end of the first linear drive assembly and the output end of the rotary drive assembly (140) is connected to the fixed plate (120).

7. The hollow webbing end inward folding device according to any one of claims 1 to 6, characterized in that, The first pressing block assembly (200) includes a first mounting block (210) and a first pressing block (220) slidably mounted on the first mounting block (210). The second pressing block assembly (300) includes a second mounting block (310) and a second pressing block (320) slidably mounted on the second mounting block (310). The first mounting block (210) is provided with a first positioning component for defining the position of the first pressing block (220), and the second mounting block (310) is provided with a second positioning component for defining the position of the second pressing block (320).

8. The hollow webbing end inward folding device according to claim 7, characterized in that, The first pressure block (220) and the second pressure block (320) have a first arc surface and a second arc surface on their sides that are close to each other, respectively. The first arc surface and the second arc surface contact to form a punching port (900) whose opening size gradually decreases from one end of the first pressure block (220) to the other end. The punch (101) is a conical structure whose size gradually decreases from one end to the other end.

9. A method for folding the end of a hollow webbing inward based on the hollow webbing end folding device according to any one of claims 1 to 8, characterized in that, Includes the following steps: S10. At the inward folding station, the first gripper assembly (400) and the second gripper assembly (500) respectively clamp and fix the front and rear sides of the hollow webbing; S20. The clamping bar assembly (100) moves toward the hollow webbing until the punch (101) enters the inside of the hollow webbing for positioning, and then releases the first clamping jaw assembly (400) and the second clamping jaw assembly (500). The clamping bar assembly (100) clamps the end of the hollow webbing and moves back until the hollow webbing passes between the first pressure block assembly (200) and the second pressure block assembly (300). S30. The first pressing block assembly (200) and the second pressing block assembly (300) approach each other until the first pressing block assembly (200) and the second pressing block assembly (300) are respectively pressed against the upper surface and the lower surface of the hollow webbing; S40. The punch (101) of the clamping bar assembly (100) moves into the punching port (900) that matches the shape of the punch (101) formed by the contact between the first pressing block assembly (200) and the second pressing block assembly (300), inserting the end of the hollow webbing into the inside of the hollow webbing, and then the first pressing block assembly (200) and the second pressing block assembly (300) release. S50. The clamping rod assembly (100) moves out of the inside of the hollow webbing to complete the inward fold of the hollow webbing.

10. The method for inward folding of the ends of hollow webbing according to claim 9, characterized in that, Before step S20, an opening measure is adopted to separate the upper and lower surfaces of the hollow webbing. The opening measure includes one or a combination of mechanical twisting and air blowing.

11. The method for inward folding of the ends of hollow webbing according to claim 9, characterized in that, In step S40, the insertion action is performed at least twice: First insertion: The punch (101) of the clamping bar assembly (100) moves into the punching port (900) formed by the contact between the first pressing block assembly (200) and the second pressing block assembly (300), which matches the shape of the punch (101), and inserts the end of the hollow webbing into the inside of the hollow webbing; Second insertion: The first pressing block assembly (200) and the second pressing block assembly (300) move away from each other to release the hollow webbing, and the first pressing block assembly (200) and the second pressing block assembly (300) move towards the inward folded end face. Then the first pressing block assembly (200) and the second pressing block assembly (300) move closer to each other to press the inward folded end face of the hollow webbing between the first pressing block assembly (200) and the second pressing block assembly (300). Subsequently, the punch (101) of the clamping bar assembly (100) moves again into the punching port (900) formed between the first pressing block assembly (200) and the second pressing block assembly (300) that matches the shape of the punch (101), inserting the end of the hollow webbing into the deeper inner side of the hollow webbing.

12. The method for inward folding of the ends of hollow webbing according to claim 11, characterized in that, In step S40, after the second insertion, the first smoothing is performed: After the second insertion action is completed, the first pressure block assembly (200) and the second pressure block assembly (300) are released, and the clamping rod assembly (100) moves forward to deliver the hollow webbing to the clamping position of the first clamping claw assembly (400) and the second clamping claw assembly (500). The first clamping claw assembly (400) and the second clamping claw assembly (500) clamp and fix the hollow webbing. The clamping rod assembly (100) retracts until it is completely removed from the hollow webbing. Then the clamping rod assembly (100) extends into the inside of the hollow webbing again to smooth the rough edges of the folded end of the hollow webbing. The stroke of the clamping rod assembly (100) extending in again is greater than the length of the folded hollow webbing.

13. The method for inward folding of the ends of hollow webbing according to claim 12, characterized in that, After the first smoothing motion, there is a second smoothing motion: The clamp assembly (100) is provided with an openable clip (104). After the first straightening action is completed, the clip (104) opens and straightens the hollow webbing inward folded end for the second time.

14. The method for inward folding of the ends of hollow webbing according to claim 13, characterized in that, After the second straightening action, there is a third straightening action: after completing the second straightening action, rotate the clip (104) to straighten the hollow webbing inward end for the third time.

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