Thread tension adaptive method, thread tension adaptive device and coverstitch machine

Abstract

Provided are a thread tension adaptive method, a thread tension adaptive device and a coverstitch machine. The thread tension adaptive method comprises: when a needle starts to move from top to bottom, sewing threads slide on thread passage springs (2); when the needle continues to move downwards to pierce a fabric, the sewing threads disengage from the thread passage springs; during the process in which the needle continues to move downwards to the lowest point, the sewing threads slide on the thread passage springs; when the needle starts to move from bottom to top, the sewing threads slide on the thread passage springs; when the needle continues to move upwards, the sewing threads disengage from the thread passage springs; and when the needle continues to move upwards to return above the fabric, the sewing threads slide on the thread passage springs, thereby completing one stitching action. Compared with conventional thread take-up structures that pull sewing threads by means of needle bars, the present solution can accurately adjust the thread consumption required by the needle, thereby realizing adaptive thread tension adjustment.

Description

Thread tension self-adaptive method, thread tension self-adaptive device and flat seaming machine TECHNICAL FIELD

[0001] The present application belongs to the technical field of thread tension self-balancing between wire unwinding and material, and particularly relates to a thread tension self-adaptive method, a thread tension self-adaptive device and a flat seaming machine. BACKGROUND

[0002] In the process of unwinding a roll of material or thread, the material end of the processing equipment actively pulls the roll of material or thread. During the unwinding process, the thread tension changes due to the action of the material end, and needs to be actively adjusted according to the needs of the material end.

[0003] For example, a flat seaming machine is a special sewing machine that forms chain-type sewing stitches and is used for knitting garment rolling, rolling, folding, flat seaming, splicing and edging. Because the thickness of the sewn fabric is different, the length of the required sewing thread is also different. The length of the sewing thread is generally determined by the thread tension. The greater the thread tension, the less the output sewing thread, which will cause the fabric to wrinkle. The smaller the thread tension, the more the output sewing thread, which will cause the sewing thread to not fit the fabric and the sewing to be not firm. Therefore, the sewing machine needs to be tested and adjusted multiple times before sewing to adjust the tension of the sewing thread, so as to achieve the purpose of normal sewing.

[0004] Existing flat seaming machines are all through traditional schemes. The user manually adjusts the corresponding thread clamp according to the test stitch, which requires the user to have certain experience and takes time to adjust, affecting work efficiency. SUMMARY

[0005] The present application provides a thread tension self-adaptive method, a thread tension self-adaptive device and a flat seaming machine, which realizes the effect of thread tension self-adaption and solves the problems of high requirements for users and low sewing efficiency in the prior art.

[0006] The thread tension self-adaptive method provided by the present application comprises:

[0007] When the needle starts to move from top to bottom, the sewing thread slides on the thread spring and tightens; when the needle continues to pierce the fabric downward, the sewing thread loosens and separates from the thread spring; during the process of the needle continuing to move downward to the lowest point, the sewing thread slides on the thread spring;

[0008] When the needle starts to move from bottom to top, the sewing thread slides on the thread spring and tightens; when the needle continues to move upward, the sewing thread loosens and separates from the thread spring; when the needle continues to move upward to above the fabric, the sewing thread slides on the thread spring to complete a needle sewing action.

[0009] In one embodiment, after the sewing thread passes through the pulley, it reaches the position of the thread spring, and the pulley freely rotates around the central axis after overcoming the rotational damping.

[0010] The line tension self-adapting device comprises:

[0011] The line plate is installed on the machine shell and can swing around a point on the machine shell. The front end of the line plate is provided with a front end line plate hole and a rear end line plate hole. The thread is first threaded through the front end line plate hole and then threaded through the rear end line plate hole.

[0012] The line spring is arranged between the front end line plate hole and the rear end line plate hole. The line spring comprises a first section, a second section and a third section. The second section is located between the first section and the third section. The second section is concave and recessed towards the machine shell.

[0013] When the needle starts to move from bottom to top, the thread slides on the third section of the line spring. When the needle continues to move upwards, the thread is located on the second section of the line spring and is separated from the line spring. When the needle continues to move upwards and returns to the cloth, the thread slides on the first section of the line spring to complete a sewing action.

[0014] In an embodiment, the two ends of the line spring are connected to the machine shell through the mounting column. The two ends of the line spring are inserted into the mounting column and fixed.

[0015] The depth of the two ends of the line spring inserted into the mounting column is adjusted to change the distance and the included angle between the line spring and the machine shell.

[0016] In an embodiment, the line tension self-adapting device further comprises:

[0017] The pulley is connected to the machine shell. After the thread is threaded through the pulley, it is threaded through the front end line plate hole of the line plate. The pulley is free to rotate around the central axis after overcoming the rotational damping.

[0018] In an embodiment, the position of the pulley on the machine shell is adjustable.

[0019] In an embodiment, three rows of rear end line plate holes are arranged on the line plate. The three rows of rear end line plate holes are arranged in front and back in the direction of the incoming thread.

[0020] Three line springs are arranged. One line spring is arranged in front of each row of rear end line plate holes.

[0021] In an embodiment, the three line springs are arranged in parallel.

[0022] In an embodiment, the closer the three line springs are to the front end line plate hole, the smaller the distance between the line springs and the machine shell.

[0023] In an embodiment, the line tension self-adapting device further comprises:

[0024] a pulley connected to the machine shell, the thread passes through the pulley and then through the front end of the thread plate hole, the pulley rotates freely around the central axis after overcoming the rotational damping;

[0025] Three pulleys are provided, and three threads pass through one pulley respectively.

[0026] In an embodiment, the three pulleys are connected to the machine shell through a wheel frame, and the position of the wheel frame on the machine shell is adjustable.

[0027] The application also provides a thread tension self-adaptive device.

[0028] The thread tension self-adaptive method provided by the application changes the positional relationship between the thread and the thread spring in different processes during operation, so that the forces between them are different, the thread is placed on the thread spring or separated from the thread spring, and the thread is retracted and pulled along with the thread spring during the swinging process, thereby reeling and unreeling the thread during sewing to meet the sewing requirements. Compared with the traditional thread plate structure that pulls the thread through the needle rod, the thread tension can be accurately adjusted to realize self-adaptive thread tension adjustment.

[0029] The thread tension self-adaptive device provided by the application comprises a thread plate installed on a machine shell and capable of swinging around a point on the machine shell, the thread plate is provided with a front end thread plate hole and a rear end thread plate hole, and the thread passes through the front end thread plate hole and then passes through the rear end thread plate hole; a thread spring is arranged between the front end thread plate hole and the rear end thread plate hole, the thread spring comprises a first segment, a second segment and a third segment, the second segment is located between the first segment and the second segment, and the second segment is recessed towards the machine shell.

[0030] During operation, when the needle starts to move from top to bottom, the thread slides on the first segment of the thread spring; when the needle continues to penetrate the fabric, the thread is located on the second segment of the thread spring and is separated from the thread spring; during the process of the needle continuing to move downward to the lowest point, the thread slides on the third segment of the thread spring; and the thread slides on the first segment of the thread spring to complete a needle sewing action.

[0031] In the thread tension self-adaptive device provided by the application, the thread spring is in a wavy shape, the thread is placed on the thread spring, and the thread is retracted and pulled along with the thread spring during the swinging process, thereby reeling and unreeling the thread during sewing to meet the sewing requirements. Compared with the traditional thread plate structure that pulls the thread through the needle rod, the thread tension can be accurately adjusted to realize self-adaptive thread tension adjustment.

[0032] Further, the thread tension self-adaptive device provided by the application can further be provided with a pulley, which is connected to the casing. After the thread is wound around the pulley, it is threaded through the front end of the thread plate hole of the thread plate. The pulley is free to rotate around the central axis after overcoming the rotational damping. During operation, the thread is tightly wound around the pulley, thereby driving the pulley. The pulley is driven from the static state instantaneously, which generates resistance. The resistance is applied to the thread, and the tension of the thread is thus increased. The size of the resistance is determined by the amount of thread. The amount of thread is small, the instantaneous speed is small, the resistance generated is small, the amount of thread is large, the instantaneous speed is large, the resistance generated is large, and the effect of adjusting the thread tension is further achieved.

[0033] The application further provides a thread binding machine comprising the thread tension self-adaptive device, thereby achieving the technical effect of self-adaptive thread tension adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0034] FIG. 2 is a schematic diagram of the stitch of the thread on the thread tension self-adaptive device in the embodiment 1 of the application.

[0035] FIG. 2 is a schematic diagram of the stitch of the thread on the thread tension self-adaptive device in the embodiment 1 of the application.

[0036] FIG. 3 is a schematic diagram of the structure of the thread passing spring in the embodiment 1 of the application.

[0037] FIG. 4 is a schematic diagram of the structure of the thread tension self-adaptive device in the embodiment 1 of the application from another perspective.

[0038] FIG. 5 is a schematic diagram of part of the structure of the thread tension self-adaptive device in the embodiment 1 of the application. DETAILED DESCRIPTION

[0039] The application will be described in detail below with reference to the drawings and in combination with the embodiments. The principles and characteristics of the application are described below in combination with the drawings. It should be noted that the embodiments in the application and the characteristics in the embodiments can be combined with each other without conflict. The examples are only used to explain the application and are not used to limit the scope of the application.

[0040] Embodiment 1

[0041] The embodiment provides a thread tension self-adaptive method, which comprises the following steps.

[0042] When the needle starts to move from top to bottom, the thread slides on the thread passing spring and is tightened. When the needle continues to pierce the cloth downward, the thread is loosened and separated from the thread passing spring. During the process of the needle continuing to move downward to the lowest point, the thread slides on the thread passing spring.

[0043] When the needle starts to move from bottom to top, the thread slides on the thread spring and tightens; the needle continues to move upwards, the thread loosens and separates from the thread spring; the needle continues to move upwards to the top of the cloth, the thread slides on the thread spring to complete a needle sewing action.

[0044] When the thread tension self-adaptive method provided by the embodiment is applied, the positional relationship between the thread and the thread spring is changed in different processes during work, so that the forces between them are different, the thread is placed on the thread spring or separated from the thread spring, and the thread is pulled and released with the thread spring in the swinging process, thereby realizing thread take-up and release during sewing to meet the sewing requirements. Compared with the traditional thread striking structure that pulls the thread through the needle bar, the thread amount required by the needle can be accurately adjusted, thereby realizing self-adaptive thread tension adjustment.

[0045] In the further provided implementation manner of the embodiment, after the thread passes through the pulley, the position of the thread reaches the thread spring, and the pulley freely rotates around the central axis after overcoming the rotation damping.

[0046] The thread is tightly wound on the pulley to drive the pulley to rotate. The pulley is instantaneously driven from the static state to generate resistance, and the resistance is applied to the thread, so that the tension of the thread is increased. The size of the resistance is determined by the thread amount. The less the thread amount, the smaller the instantaneous speed, and the smaller the resistance generated. The more the thread amount, the greater the instantaneous speed, and the greater the resistance generated. Therefore, the effect of thread tension adjustment is realized.

[0047] The embodiment also provides a thread tension self-adaptive device, referring to FIGS. 1-5, comprising:

[0048] The thread striking plate 1 is installed on the machine shell 100 and can swing around a point on the machine shell 100. The front end thread striking plate hole 13 and the rear end thread striking plate hole 11 are arranged on the thread striking plate 1. The thread passes through the front end thread striking plate hole 13 and then passes through the rear end thread striking plate hole 11.

[0049] The thread spring 2 is arranged between the front end thread striking plate hole 13 and the rear end thread striking plate hole 11. The thread spring 2 comprises a first section 7, a second section 8 and a third section 9. The second section 8 is located between the first section 7 and the third section 9. The second section 8 is concave and concave towards the direction of the machine shell 100.

[0050] When the needle starts to move from top to bottom, the thread slides on the first section 7 of the thread spring 2. When the needle continues to move downward to pierce the cloth, the thread is located on the second section 8 of the thread spring 2 and separates from the thread spring 2. During the process that the needle continues to move downward to the lowest point, the thread slides on the third section 9 of the thread spring 2.

[0051] When the needle starts to move from bottom to top, the thread slides on the third section 9 of the thread spring 2, the needle continues to move upwards, the thread is located on the second section 8 of the thread spring 2, and the thread is separated from the thread spring 2; the needle continues to move upwards to the top of the fabric, the thread slides on the first section 7 of the thread spring 2 to complete a sewing action.

[0052] The thread tension self-adaptive device provided in the embodiment is used on a flat seaming machine, the needle moves up and down to complete a sewing action, and specifically:

[0053] 1) When the needle moves from top to bottom to the middle position, the thread is placed on the first section 7 of the thread spring 2, at this time, the action is similar to slowly pulling up the thread to realize the effect of tightening the thread, and the purpose is to prevent the stitch of the last needle from being loose;

[0054] 2) When the needle continues to move from top to bottom to pierce the fabric, at this time, the thread is located in the recess formed by the second section 8, the thread is separated from the thread spring, at this time, the thread ring formed by piercing the fabric needs a certain length of thread, if the thread is continuously tightened, the thread is easy to break;

[0055] 3) During the process that the needle moves down to the lowest point, the thread continues to move downwards and is separated from the recess formed by the second section 8 and is placed on the third section 9 of the thread spring 2, this action is used to complete the “back wiping” action in flat seaming;

[0056] 4) During the process that the needle moves from bottom to top, the thread moves from bottom to top through the thread spring 2, when the thread is in the groove formed by the second section 8, at this time, the thread is loosened to cooperate with the needle hook to enter the “thread throwing”;

[0057] 5) The needle continues to move from bottom to top, the thread is separated from the groove formed by the second section 8, is placed on the first section 7 of the thread spring 2 and moves upwards to tighten the thread, thereby completing a needle sewing action.

[0058] The thread tension self-adaptive effect is realized, and the above-mentioned actions can form stitches on the fabric.

[0059] In the thread tension self-adaptive device provided in the embodiment, the thread spring is in a wavy shape, the thread is placed on the thread spring 2, and the thread is pulled and released with the thread spring 2 in the process of swinging, thereby realizing thread collection and thread release in the process of sewing to meet the sewing requirements. Compared with the traditional thread punching structure of pulling the thread by the needle rod, the thread amount required by each needle can be accurately adjusted, thereby realizing self-adaptive thread tension adjustment.

[0060] In one embodiment of the embodiment, the two ends of the thread spring 2 are connected to the machine shell 100 through the mounting column 10, and the two ends of the thread spring 2 are inserted into the mounting column 10 and fixed;

[0061] The depth of the two ends of the wire spring 2 inserted into the mounting column 10 is adjusted to change the distance and angle of the wire spring 2 from the shell 100, so as to achieve the purpose of adjusting the wire amount.

[0062] The mounting column 10 is provided with a length direction long hole, and the end of the wire spring 2 is inserted into the mounting column 10, and the length of the wire spring 2 inserted into the mounting column 10 is fixed by screwing the screw into the through hole.

[0063] In an embodiment of the present embodiment, the wire tension self-adaptive device further comprises:

[0064] The pulley 4 is connected to the shell 100, and the thread passes through the pulley 4, then passes through the front end of the thread plate 1, and then passes through the thread plate hole 13. The pulley 4 can rotate freely around the central axis after overcoming the rotational damping.

[0065] The thread is tightly wound on the pulley 4, which drives the pulley 4 to rotate. The pulley 4 is driven from a stationary state and will generate resistance. The resistance is applied to the thread, and the tension of the thread is increased. The size of the resistance is determined by the amount of wire used. The less the amount of wire used, the smaller the instantaneous speed, and the smaller the resistance generated. The more the amount of wire used, the greater the instantaneous speed, and the greater the resistance generated. Therefore, the effect of adjusting the wire tension is achieved.

[0066] The pulley 4, the thread plate 1 and the wire spring 2 are added to the traditional structure. Through the adaptation of the pulley 4, the thread plate 1 and the wire spring 2, the effect of wire tension self-adaption is achieved, and the problem of insufficient manual tightening of the thread tension of the existing scheme is solved.

[0067] The circumferential surface of the pulley 4 is provided with a wire passing groove, and the wire passing groove is V-shaped to limit the thread from separating from the pulley 4.

[0068] The position of the pulley 4 on the shell 100 can be adjusted to cope with different cloth thicknesses and wire amounts.

[0069] The binding machine often needs to work with three threads. For the case of using the wire tension self-adaptive device in the thread machine, in an embodiment of the present embodiment, three rows of rear end thread plate holes 11 are provided on the thread plate 1, and the three rows of rear end thread plate holes 11 are arranged in front and back in the direction of the thread.

[0070] Three wire springs 2 are provided, and one wire spring 2 is provided at the front end of each row of rear end thread plate holes 11.

[0071] The stitches of the first thread 201, the second thread 202 and the third thread 203 on the thread plate 1 and the wire spring 2 can be referred to FIG. 2.

[0072] In order to adapt to different positions of the wire spring 2, as can be seen from FIG. 4, two rear end thread plate holes 11 are provided side by side in the present embodiment. In other embodiments, more rear end thread plate holes 11 are provided side by side.

[0073] In one embodiment of the present embodiment, the three wire passing springs 2 are arranged in parallel, so that the adjustment process of the three sewing threads is consistent.

[0074] In one embodiment of the present embodiment, as can be seen from FIG. 4, the closer the three wire passing springs 2 are to the front end of the wire plate hole, the smaller the distance to the shell, so as to avoid interference and entanglement between the sewing threads.

[0075] Correspondingly, three pulleys 4 are arranged, and the three sewing threads pass through one pulley 4 respectively. The three pulleys 4 are different in height and staggered in position, and are connected to the shell 100 through a wheel frame 3. The position of the wheel frame 3 on the shell 100 is adjustable.

[0076] In the present embodiment, first wire passing holes 5 are arranged at the front end of the three pulleys 4 on the wheel frame 3, and three second wire passing holes 6 are arranged side by side at the rear end of the three pulleys 4, for guiding the stitches of the sewing threads.

[0077] In order to further adapt to various fabrics and various sewing threads, the connection length between the wire plate 1 and the swing arm 15 in the present embodiment is adjustable, and one end of the swing arm 15 is hinged to the shell 100.

[0078] In the present embodiment, ceramics are embedded in the first wire passing holes 5, the second wire passing holes 6, the front end wire plate holes 13 and the rear end wire plate holes 11, so as to reduce the resistance of the sewing threads and make the threads more smooth.

[0079] The present embodiment also provides a flat seaming machine comprising the above-mentioned thread tension self-adapting device. The wire plate 1 and the wire passing spring 2 of the thread tension self-adapting device are installed in the shell 100 of the flat seaming machine, and the technical effect of self-adapting thread tension adjustment can also be achieved, which will not be described again.

[0080] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0081] In the present application, unless specifically defined otherwise, the terms "mount", "connected", "connecting", "fixed", "unfixed", and the like should be construed broadly and do not necessarily mean a fixed connection, but can also mean a detachable connection, or being integrated; can be a mechanical connection, or an electrical connection; can be a direct connection, or an indirect connection through an intermediate medium; can be an internal connection of two elements, or an interaction relationship between two elements, unless specifically defined otherwise. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0082] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "above", "over", and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher than the second feature in horizontal height. The first feature is "under", "below", and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower than the second feature in horizontal height.

[0083] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present application and the features of different embodiments or examples can be combined and modified by those skilled in the art without contradiction.

[0084] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A line tension adaptive method, characterized by, Comprising: When the needle starts to move from top to bottom, the thread slides on the thread spring and tightens; when the needle continues to pierce the fabric downward, the thread loosens and detaches from the thread spring; during the process of the needle continuing to move downward to the lowest point, the thread slides on the thread spring; When the needle starts to move from bottom to top, the thread slides on the thread spring and tightens; when the needle continues to move upward, the thread loosens and detaches from the thread spring; when the needle continues to move upward to above the fabric, the thread slides on the thread spring to complete a needle sewing action.

2. The thread tension self-adapting method according to claim 1, characterized in that, After the thread passes through the pulley, it reaches the position of the thread spring, and the pulley rotates freely around its central axis after overcoming the rotational damping.

3. A line tension self-adapting device, characterized in that, Comprising: The thread plate is installed on the machine shell and can swing around a point on the machine shell, and the front end thread plate hole and the rear end thread plate hole are arranged on the thread plate, and the thread passes through the front end thread plate hole and then passes through the rear end thread plate hole; The thread spring is arranged between the front end thread plate hole and the rear end thread plate hole, and the thread spring comprises a first section, a second section and a third section, the second section is located between the first section and the third section, and the second section is recessed towards the machine shell; Wherein: when the needle starts to move from top to bottom, the thread slides on the first section of the thread spring; when the needle continues to pierce the fabric downward, the thread is located on the second section of the thread spring and detaches from the thread spring; during the process of the needle continuing to move downward to the lowest point, the thread slides on the third section of the thread spring; When the needle starts to move from bottom to top, the thread slides on the third section of the thread spring, and when the needle continues to move upward, the thread is located on the second section of the thread spring and detaches from the thread spring; when the needle continues to move upward to above the fabric, the thread slides on the first section of the thread spring to complete a needle sewing action.

4. The thread tension self-adapting device according to claim 3, characterized in that, Both ends of the thread spring are connected to the machine shell through the mounting column, and both ends of the thread spring are inserted into the mounting column and fixed; The depth of the two ends of the thread spring inserted into the mounting column is adjusted to change the distance and angle between the thread spring and the machine shell.

5. The thread tension self-adapting device of claim 3, wherein, Further comprising: The pulley is connected to the machine shell, and after the thread passes through the pulley, it passes through the front end thread plate hole of the thread plate, and the pulley rotates freely around its central axis after overcoming the rotational damping.

6. The thread tension self-adapting device according to claim 5, wherein, The position of the pulley on the machine shell can be adjusted.

7. The thread tension self-adapting device of claim 1, wherein, Three rows of rear end thread plate holes are arranged on the thread plate, and the three rows of rear end thread plate holes are arranged in front and back in the direction of the incoming thread; Three thread springs are arranged, and one thread spring is arranged in front of each row of rear end thread plate holes.

8. The thread tension self-adapting device according to claim 7, characterized in that, The three thread springs are arranged in parallel.

9. The thread tension self-adapting device according to claim 8, wherein, The closer the three thread springs are to the front end thread plate hole, the smaller the distance between the thread spring and the machine shell.

10. The thread tension self-adapting device of claim 7, wherein, Further comprising: The pulley is connected to the machine shell, and after the thread passes through the pulley, it passes through the front end thread plate hole of the thread plate, and the pulley rotates freely around its central axis after overcoming the rotational damping. Three pulleys are arranged, and three threads pass through one pulley respectively.

11. The thread tension self-adapting device of claim 6, wherein, The three pulleys are connected to the machine shell through the wheel frame, and the position of the wheel frame on the machine shell can be adjusted. The thread tension self-adapting device of any one of claims 3 to 9 is included.

12. A flat seaming machine characterized by ​