Thread sweeping mechanism of multi-needle machine
By designing a thread sweeping mechanism on a multi-needle machine, using the cooperation of the thread sweeping frame and the thread hook, the failure problem caused by the thread retention of the needle and thread head is solved, and the effect of reducing the failure rate and facilitating sewing is achieved.
Patent Information
- Application Number
- CN202420532065.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-03-19
AI Technical Summary
After the sewing process of the multi-needle machine, the thread tip on the needle is easily left in the fabric, causing the needle to be broken or jumped, increasing the failure rate.
A multi-needle machine is designed to design a wire sweeping mechanism, including a wire sweeping frame set above the needle plate and a wire hook is fixed on the wire sweeping frame. The swing or translation of the sweeping frame is controlled by the drive structure, so that the hook can be moved into or out of the operating space, hook the thread tip on the needle and pull it out of the fabric.
It effectively avoids the needle breakage or jumping wire caused by direct pulling out the fabric, reduces the failure rate of the multi-needle machine, and facilitates subsequent sewing.
Smart Images
Figure CN222434803U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sewing machines and relates to a thread sweeping mechanism of a multi-needle sewing machine. Background Art
[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material. With the development of sewing technology and the improvement of sewing machine manufacturing level, there are more and more types of sewing machines.
[0003] Among them, the multi-needle sewing machine is a sewing machine that can sew several lines of stitches at the same time. It has multiple needles. The multi-needle sewing machine is widely used in decorative sewing. According to the number of needles, the multi-needle sewing machine has 3 needles, 4 needles, 6 needles, 9 needles, 12 needles, 16 needles, 21 needles, 24 needles, 25 needles, 33 needles, 38 needles, and 50 needles. The multi-needle sewing machine can realize pleating, tucking, elastic wrinkling and other functions with auxiliary devices.
[0004] At present, since multi-needle machines have many needles, the corresponding needles and threads are also fed simultaneously. After one sewing is completed, the needles and threads connected to the fabric need to be cut off at the same time, and the sewn workpiece is taken out for the next sewing. However, in the above process, after the thread on the fabric is cut off by the cutter, the thread ends on each needle are likely to remain in the fabric. If the fabric is pulled out directly, some needles are likely to be broken or the thread may jump, resulting in a high failure rate of the multi-needle machine, which often requires maintenance. Utility Model Content
[0005] The purpose of the utility model is to solve the above problems in the prior art and propose a thread-wiping mechanism for a multi-needle machine. The technical problem to be solved by the utility model is how to reduce the failure rate of the multi-needle machine.
[0006] The purpose of the utility model can be achieved through the following technical solutions: a thread-wiping mechanism of a multi-needle machine, the multi-needle machine includes a needle plate and a plurality of needles arranged in a straight line and perpendicular to the needle plate, the needles are located above the needle plate and can move up and down relative to the needle plate, and is characterized in that the thread-wiping mechanism includes a driving structure and a strip-shaped thread-wiping frame arranged above the needle plate, the thread-wiping frame is fixedly connected with a plurality of thread hooks arranged along the length direction of the thread-wiping frame and corresponding to the needles one by one, the front end of the thread hook is used to hook the thread head of the corresponding needle, and when the needle moves up relative to the needle plate, an operating space can be reserved between the needle head of the needle and the upper surface of the needle plate, and the driving structure can drive the thread-wiping frame to swing back and forth or translate back and forth relative to the needle plate to move the thread hook into or out of the above-mentioned operating space.
[0007] For a multi-needle sewing machine with a row of needles, the utility model adopts the design of the above thread sweeping mechanism, that is, by arranging a strip-shaped thread sweeping frame above the needle plate, and arranging a thread hook on the thread sweeping frame. Since the thread hooks are arranged along the length direction of the thread sweeping frame and correspond to the needles one by one, the front end of the thread hook can be used to hook the thread end of the corresponding needle. Then, under the drive of the driving structure, the thread sweeping frame moves the thread hook to the operating space, so that the thread sweeping mechanism can hook the thread end of each needle of the multi-needle machine out of the fabric, thereby avoiding the situation of directly pulling out the fabric and breaking the needle or skipping the thread. The specific working principle is as follows: when the multi-needle machine completes the sewing work, the thread cutting mechanism cuts the suture thread, and then manipulates the needle to move up relative to the needle plate. Until an operating space is left between the needle head of the machine needle and the upper surface of the needle plate, at this time a section of thread will be left on the needle head of the machine needle, and the thread will be buried in the fabric. In this regard, the driving structure drives the thread sweeping frame to swing or translate so that the thread hook can move into the operating space. After moving into place, the driving structure controls the thread sweeping frame to drive the thread hook to retreat until it moves out of the operating space. During this process, the front end of the thread hook can hook the thread head on the corresponding needle, so that the thread head can be pulled out of the fabric, thereby preventing the thread head on the needle from hooking the fabric, avoiding pulling out the fabric and breaking the needle or causing the thread on the needle to jump during the pulling process, thereby reducing the failure rate of the multi-needle machine; and the thread hook can also pull out a certain amount of the thread to facilitate subsequent sewing.
[0008] In the thread sweeping mechanism of the multi-needle machine, the thread sweeping frame has a mounting surface parallel to the needle plate, and the thread hook is fixedly connected to the mounting surface. Through the above mounting surface design, the mounting height of the thread hook can be kept consistent, thereby avoiding the situation of inconsistent thread hooking position or even needle collision due to inconsistent mounting height, which is conducive to reducing the failure rate.
[0009] In the thread sweeping mechanism of the above-mentioned multi-needle machine, the thread hook includes a sheet-like body, the rear end of the body is fixedly connected to the thread sweeping frame, the front end of the body has a sickle-shaped curved hook head that is bent relative to the body, and a V-shaped thread hooking opening is formed between the curved hook head and the body. Through the above design, no matter how the thread end on the needle bends in the vertical direction, the sickle-shaped curved hook head and the V-shaped thread hooking opening can ensure that the thread end on the needle is hooked, thereby ensuring that the thread hook can reliably hook the thread, which is conducive to reducing the failure rate.
[0010] In the thread sweeping mechanism of the multi-needle machine, the outer side of the hook head has an arc-shaped thread pushing surface. With the above design, when the hook moves forward to hook the thread, if there is a thread head blocking the front, the thread will not get stuck when pushed by the thread pushing surface, thereby avoiding the situation where the needle is broken due to thread pushing stuck, which is conducive to reducing the failure rate of the multi-needle machine.
[0011] In the above-mentioned thread-wiping mechanism of the multi-needle machine, the driving structure includes a driving motor fixed on the casing or frame of the multi-needle machine, and connecting rod one, connecting rod two, connecting rod three, connecting rod four and a fixed arm are arranged between the driving motor and the thread-wiping frame. The head end of the connecting rod one is fixedly connected to the rotating shaft of the driving motor, the tail end of the connecting rod one is hinged to the head end of the connecting rod two, the tail end of the connecting rod two is hinged to the head end of the connecting rod three, the fixed arm is fixedly connected to the driving motor, and a hinge shaft is rotatably connected to the fixed arm, the tail end of the connecting rod three and the head end of the connecting rod four are both hinged to the fixed arm through the above-mentioned hinge shaft, and the tail end of the connecting rod four is fixedly connected to the thread-wiping frame. Through the above design, the rotational motion of the motor shaft of the driving motor is converted into the swinging motion of the thread sweeping frame, so as to control the thread sweeping frame to move back and forth to the position of the needle, so that the wire hook can move in or out of the operating space, thereby realizing automatic thread hooking and achieving the purpose of reducing the failure rate. The specific driving working principle is as follows: First, the motor shaft of the driving motor rotates, thereby driving the connecting rod 1 to swing, and the connecting rod 1 drives the connecting rod 2 to swing, and the connecting rod 2 drives the connecting rod 3 to swing. Since the connecting rod 3 and the connecting rod 4 share a hinge shaft, the connecting rod 3 can drive the thread sweeping frame to swing relative to the needle via the hinge shaft. At the same time, the matching design of the above-mentioned transmission connecting rod can make the swing amplitude of the thread sweeping frame within a reasonable range, which can not only meet the thread hooking requirements, but also will not interfere with peripheral components such as the needle plate, which is conducive to reducing the failure rate.
[0012] In the thread sweeping mechanism of the multi-needle machine, the tail end of the connecting rod 4 has a waist-shaped hole, the thread sweeping frame has a connecting portion extending upward, a screw is inserted into the waist-shaped hole, and the screw passes through the connecting portion to fix the connecting portion with the tail end of the connecting rod 4. Through the above design, the relative distance between the connecting rod 4 and the thread sweeping frame can be adjusted as needed, so as to facilitate the installation and debugging of the thread sweeping frame, avoid interference between the thread sweeping frame and other components during movement, and thus help reduce the failure rate.
[0013] In the thread-wiping mechanism of the multi-needle machine, a connecting arm is fixedly connected to the driving motor, and the connecting arm is fixedly connected to the housing or frame of the multi-needle machine. The above design facilitates the installation of the driving structure.
[0014] As an alternative, in the thread sweeping mechanism of the above-mentioned multi-needle machine, the driving structure includes a driving cylinder fixed on the housing or frame of the multi-needle machine and arranged in the horizontal direction, one end of the thread sweeping frame is fixedly connected to a connecting frame, and the piston rod of the driving cylinder is fixedly connected to the connecting frame. Through the driving structure designed above, the thread sweeping frame can move in the horizontal direction under the drive of the driving cylinder, so as to control the thread sweeping frame to move back and forth toward the position of the machine needle, so that the thread hook can move in or out of the operating space to realize the thread hooking operation, thereby achieving the purpose of reducing the failure rate.
[0015] Compared with the prior art, the thread sweeping mechanism of the multi-needle machine has the following advantages: the thread sweeping mechanism has a simple and reasonable structure and is easy to install. After installing the thread sweeping mechanism, the thread ends on each needle of the multi-needle machine can be hooked out of the fabric, thereby avoiding the situation of breaking the needle or thread jump caused by directly pulling out the fabric, which greatly reduces the failure rate of the multi-needle machine. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the multi-needle machine where the thread sweeping mechanism is located in the first embodiment.
[0017] Figure 2 This is a schematic diagram of the structure of the line sweeping mechanism in the first embodiment. Figure 1 .
[0018] Figure 3 This is a schematic diagram of the structure of the line sweeping mechanism in the first embodiment. Figure 2 .
[0019] Figure 4 It is a connection diagram of the wire hook and the wire sweeping frame in the wire sweeping mechanism.
[0020] Figure 5 It is a schematic diagram of the structure of the wire hook.
[0021] In the figure, 1. needle plate; 2. machine needle; 3. thread sweeping frame; 31. mounting surface; 32. connecting part; 4. thread hook; 41. main body; 42. hook head; 421. thread pushing surface; 43. thread hooking mouth; 5. driving motor; 6. connecting rod one; 7. connecting rod two; 8. connecting rod three; 9. connecting rod four; 91. waist-shaped hole; 10. fixed arm; 11. connecting arm; 12. hinge shaft; a. operating space. DETAILED DESCRIPTION
[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0023] Embodiment 1:
[0024] Specifically, if Figure 1 As shown, the multi-needle machine includes a needle plate 1 and a plurality of needles 2 arranged in a straight line and perpendicular to the needle plate 1. The needles 2 are located above the needle plate 1 and can move up and down relative to the needle plate 1. When the needles 2 move down, the needles 2 can pass through the needle plate 1. When the needles 2 move up relative to the needle plate 1, an operating space a can be left between the needle heads of the needles 2 and the upper surface of the needle plate 1. Figure 2 and Figure 3As shown, the thread sweeping mechanism includes a driving structure and a strip-shaped thread sweeping frame 3 disposed above the needle plate 1. The thread sweeping frame 3 is fixedly connected with a plurality of thread hooks 4 arranged along the length direction of the thread sweeping frame 3 and corresponding to the machine needles 2 one by one. The front end of the thread hook 4 is used to hook the thread end of the corresponding machine needle 2. The driving structure can drive the thread sweeping frame 3 to swing back and forth so that the thread hook 4 moves into or out of the above-mentioned operating space a. In this embodiment, the driving structure includes a driving motor 5 fixed to the housing or frame of the multi-needle machine, and a connecting arm 11 is fixedly connected to the driving motor 5, and the connecting arm 11 is fixedly connected to the housing or frame of the multi-needle machine. Connecting rod 1 6, connecting rod 2 7, connecting rod 3 8, connecting rod 4 9 and fixed arm 10 are arranged between driving motor 5 and wire sweeping frame 3. The head end of connecting rod 1 6 is fixedly connected to the rotating shaft of driving motor 5, the tail end of connecting rod 1 6 is hinged to the head end of connecting rod 2 7, the tail end of connecting rod 2 7 is hinged to the head end of connecting rod 3 8, the fixed arm 10 is fixedly connected to driving motor 5, a hinge shaft 12 is rotatably connected to the fixed arm 10, the tail end of connecting rod 3 8 and the head end of connecting rod 4 9 are both hinged to the fixed arm 10 through the hinge shaft 12, and the tail end of connecting rod 4 9 is fixedly connected to wire sweeping frame 3. A waist-shaped hole 91 is provided at the tail end of connecting rod 4 9, and a connecting portion 32 extending upward is provided on the wire sweeping frame 3. A screw is inserted into the waist-shaped hole 91, and the screw is not shown in the figure. The screw passes through the connecting portion 32 to connect the connecting portion 32 to the tail end of connecting rod 4 9.
[0025] More specifically, if Figure 4 As shown, the thread sweeping frame 3 has a mounting surface 31 parallel to the needle plate 1, and the thread hook 4 is fixedly connected to the mounting surface 31. Figure 5 As shown, the wire hook 4 includes a sheet-like body 41, the rear end of the body 41 is fixedly connected to the wire sweeping frame 3, the front end of the body 41 has a sickle-shaped curved hook head 42 which is bent relative to the body 41, a V-shaped wire hooking opening 43 is formed between the inner side of the curved hook head 42 and the body 41, and the outer side of the curved hook head 42 has an arc-shaped wire pushing surface 421.
[0026] Embodiment 2:
[0027] The technical solution in this embodiment is basically the same as the technical solution in Example 1, except that, in this embodiment, the driving structure can drive the thread sweeping frame 3 to translate back and forth so that the thread hook 4 moves into or out of the above-mentioned operating space a, and the driving structure includes a driving cylinder fixed on the casing or frame of the multi-needle machine and arranged in a horizontal direction, one end of the thread sweeping frame 3 is fixedly connected to a connecting frame, and the piston rod of the driving cylinder is fixedly connected to the connecting frame.
[0028] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
[0029] Although this article uses more terms such as needle plate 1, machine needle 2, thread sweeping frame 3, mounting surface 31, connecting part 32, thread hook 4, body 41, hook head 42, thread pushing surface 421, thread hooking port 43, driving motor 5, connecting rod 1 6, connecting rod 2 7, connecting rod 3 8, connecting rod 4 9, waist hole 91, fixed arm 10, connecting arm 11, hinge shaft 12, and operating space a, it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.
Claims
1. A thread-wiping mechanism for a multi-needle machine, the multi-needle machine comprising a needle plate (1) and a plurality of needles (2) arranged in a straight line and perpendicular to the needle plate (1), the needles (2) being located above the needle plate (1) and being able to move up and down relative to the needle plate (1), characterized in that: The thread sweeping mechanism comprises a driving structure and a strip-shaped thread sweeping frame (3) arranged above the needle plate (1); the thread sweeping frame (3) is fixedly connected with a plurality of thread hooks (4) arranged along the length direction of the thread sweeping frame (3) and corresponding one to one with the machine needles (2); the front end of the thread hook (4) is used to hook the thread head of the corresponding machine needle (2); when the machine needle (2) moves upward relative to the needle plate (1), an operating space (a) can be reserved between the needle head of the machine needle (2) and the upper surface of the needle plate (1); the driving structure can drive the thread sweeping frame (3) to swing back and forth or translate back and forth relative to the needle plate (1) so that the thread hook (4) moves into or out of the above-mentioned operating space (a).
2. The thread sweeping mechanism of the multi-needle machine according to claim 1, characterized in that: The thread sweeping frame (3) has a mounting surface (31) parallel to the needle plate (1), and the thread hook (4) is fixedly connected to the mounting surface (31).
3. The thread sweeping mechanism of the multi-needle machine according to claim 1 or 2, characterized in that: The wire hook (4) comprises a sheet-shaped body (41), the rear end of the body (41) is fixedly connected to the wire sweeping frame (3), the front end of the body (41) has a sickle-shaped curved hook head (42) bent relative to the body (41), and a V-shaped wire hooking opening (43) is formed between the curved hook head (42) and the body (41).
4. The thread sweeping mechanism of the multi-needle machine according to claim 3, characterized in that: The outer side of the hook head (42) has an arc-shaped wire-pushing surface (421).
5. The thread sweeping mechanism of the multi-needle machine according to claim 1 or 2, characterized in that: The driving structure comprises a driving motor (5) fixed on a casing or a frame of the multi-needle machine, and a connecting rod one (6), a connecting rod two (7), a connecting rod three (8), a connecting rod four (9) and a fixed arm (10) are arranged between the driving motor (5) and the thread sweeping frame (3), the head end of the connecting rod one (6) is fixedly connected to the rotating shaft of the driving motor (5), the tail end of the connecting rod one (6) is hinged to the head end of the connecting rod two (7), the tail end of the connecting rod two (7) is hinged to the head end of the connecting rod three (8), the fixed arm (10) is fixedly connected to the driving motor (5), and a hinge shaft (12) is rotatably connected to the fixed arm (10), the tail end of the connecting rod three (8) and the head end of the connecting rod four (9) are both hinged to the fixed arm (10) through the above-mentioned hinge shaft (12), and the tail end of the connecting rod four (9) is fixedly connected to the thread sweeping frame (3).
6. The thread sweeping mechanism of the multi-needle machine according to claim 5, characterized in that: The tail end of the connecting rod four (9) is provided with a waist-shaped hole (91), and the wire sweeping frame (3) is provided with a connecting portion (32) extending upward, and a screw is inserted into the waist-shaped hole (91), and the screw passes through the connecting portion (32) to fix the connecting portion (32) with the tail end of the connecting rod four (9).
7. The thread sweeping mechanism of the multi-needle machine according to claim 5, characterized in that: A connecting arm (11) is fixedly connected to the driving motor (5), and the connecting arm (11) is fixedly connected to a casing or a frame of the multi-needle machine.
8. The thread sweeping mechanism of the multi-needle machine according to claim 1 or 2, characterized in that: The driving structure comprises a driving cylinder fixed on a casing or a frame of the multi-needle machine and arranged in a horizontal direction, one end of the thread sweeping frame (3) is fixedly connected to a connecting frame, and a piston rod of the driving cylinder is fixedly connected to the connecting frame.