Multi-needle machine with switchable manual and automatic thread trimming and manual thread trimming method

Abstract

The present invention belongs to the technical field of sewing devices, and provides a multi-needle machine with switchable manual and automatic thread trimming and a manual thread trimming method, including: having an automatic thread trimming state and a manual thread trimming state, the multi-needle machine includes: a machine table, on which a machine head is provided; a sewing mechanism, which is provided on the machine head; a thread trimming mechanism, which is provided on the machine head and is located below the sewing mechanism; a thread loosening mechanism, which is connected to the surface of the machine head and is used to put the suture in a semi-relaxed state or a fully relaxed state. Compared with the existing technology, the advantage of the present invention is that by providing a thread loosening mechanism that puts the suture in a semi-relaxed state or a fully relaxed state and a control unit that controls the operation or power-off of the thread trimming mechanism, the multi-needle machine can switch between automatic thread trimming and manual thread trimming at will, thereby ultimately meeting the diverse needs of enterprises for multi-needle machines.

Description

Technical Field

[0001] The invention belongs to the technical field of sewing devices, and in particular relates to a multi-needle machine with switchable manual and automatic thread trimming and a manual thread trimming method. Background Art

[0002] There are many types of multi-needle machines, which are widely used in decorative sewing. They are usually divided according to the number of needles. Multi-needle machines include 3-needle, 4-needle, 6-needle, and 9-needle sewing machines. Multi-needle machines can achieve functions such as pleating, ruffling, and elastic wrinkling when equipped with auxiliary devices.

[0003] At present, there are two ways for multi-needle machines to trim the thread after sewing the body: manual trimming and automatic trimming. In the multi-needle machine with automatic trimming, the thread is always in a timed loosening state. After the sewing of the body is completed, the body and the thread cannot be pulled out of the multi-needle machine for manual trimming. In this way, the thread on the body can only be cut by the thread trimming mechanism set in the multi-needle machine. This makes the function of the automatic thread trimmer relatively single and unable to meet the diversified needs of enterprises. In addition, when the current multi-needle machine uses elastic thread or cotton thread composed of multiple thin threads to perform sewing operations on the body, the elastic thread or cotton thread is easy to spread out during the sewing process, making it impossible to complete the normal sewing work of the body. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multi-needle machine with switchable manual and automatic thread trimming and a manual thread trimming method in response to the current status of the existing technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: to propose a multi-needle machine with switchable manual and automatic thread trimming, which has an automatic thread trimming state and a manual thread trimming state, and the multi-needle machine includes:

[0006] a machine platform, on which a machine head is provided;

[0007] a sewing mechanism, which is arranged on the machine head;

[0008] a thread trimming mechanism, which is arranged on the machine head and below the sewing mechanism;

[0009] A thread loosening mechanism, which is connected to the surface of the handpiece and is used to put the suture into a timed loosening state or a fully relaxed state;

[0010] a control unit, which is electrically connected to the thread trimming mechanism and is used to control the start and stop of the thread trimming mechanism;

[0011] When the multi-needle machine is in the automatic thread trimming state, the suture on the thread loosening mechanism is in a timed thread loosening state, and the control unit is used to control the thread trimming mechanism to cut the suture on the sewing body;

[0012] When the multi-needle machine is in manual thread trimming state, the control unit controls the thread trimming mechanism to be in a power-off state, and the sutures on the thread loosening mechanism are in a fully relaxed state and can be moved to the outside of the sewing mechanism together when the sewing body is pulled out of the sewing mechanism.

[0013] In the above-mentioned multi-needle machine with switchable manual and automatic thread trimming, the thread trimming mechanism includes:

[0014] base;

[0015] a first driving member, which is disposed on the base and electrically connected to the control unit;

[0016] a movable knife assembly, which is movably arranged on the base and connected to the output end of the first driving member, wherein the moving direction of the movable knife assembly is perpendicular to the moving direction of the suture, and the suture is located on the moving path of the movable knife assembly;

[0017] A blocking block is connected to the base. When the first driving member drives the movable knife group to move, the blocking block and the movable knife group are movably abutted against each other to enable the movable knife group to cut the suture.

[0018] In the above-mentioned multi-needle machine with switchable manual and automatic thread trimming, the movable knife group includes a connecting plate connected to the output end of the first driving member and movable knives spaced apart on the connecting plate, and the movable knife is provided with an upper thread blade and a lower thread blade along the moving direction of the movable knife group. When the first driving member drives the movable knife group to move, the upper thread blade and the lower thread blade both pass over the blocking block to cut the upper thread and the lower thread.

[0019] In the above-mentioned multi-needle machine with switchable manual and automatic thread trimming, the thread loosening mechanism includes:

[0020] A wire loosening frame is provided on the side of the machine head, and a plurality of wire clamps are distributed on one side of the wire loosening frame;

[0021] a first threading hole, which is provided on the other side of the wire loosening frame and corresponds one-to-one to the wire clamp;

[0022] A movable rod is movably arranged on the thread loosening frame, and a curved rod is provided on the movable rod between the thread clamp and the first threading hole. The upper thread passes through the thread clamp, the curved rod and the first threading hole in sequence. The curved rod and the upper thread are movably abutted to put the upper thread in a timed thread loosening state or a fully relaxed state.

[0023] In the above-mentioned multi-needle machine with switchable manual and automatic thread trimming, the thread loosening mechanism further comprises:

[0024] a second driving member connected to the machine head and located on the opposite side of the wire release frame;

[0025] a first connecting rod connected to an output end of the second driving member;

[0026] a second connecting rod, which is rotatably mounted on the machine head and has one end connected to the movable rod;

[0027] A transmission rod, one end of which passes through the machine head and is connected to the second connecting rod, and the other end of the transmission rod is connected to the first connecting rod.

[0028] In the above-mentioned multi-needle machine with switchable manual and automatic thread trimming, the thread loosening mechanism further comprises:

[0029] a third driving member connected to the handpiece;

[0030] a wire-passing frame connected to the machine head and located below the third driving member, wherein the wire-passing frame is provided with a second threading hole;

[0031] A thread loosening member is movably arranged on the machine head and connected to the output end of the third driving member. The thread loosening member is provided with two third threading holes arranged opposite to each other. The bottom line passes through the third threading hole on one side of the thread loosening member, the second threading hole and the third threading hole on the other side of the thread loosening member in sequence. When the third driving member drives the thread passing frame to move on the machine head, it is used to drive the bottom line to be in a timed thread loosening state or a fully relaxed state.

[0032] The multi-needle machine with switchable manual and automatic thread trimming further comprises:

[0033] A support frame connected to the machine head and located to the side of the thread passing frame, wherein the support frame is provided with two sets of fourth threading holes arranged opposite to each other, and the fourth threading holes are used for passing the bottom thread;

[0034] A lubricating box is connected to the support frame. The lubricating box contains lubricating oil. A wire passing groove is provided on the lubricating box. The wire oil is adhered to the bottom line passing through the groove.

[0035] The present invention solves the above technical problems and further proposes a manual thread trimming method, comprising the steps of:

[0036] S1, cut off the power supply of the thread trimming mechanism through the control unit;

[0037] S2, the suture is in a fully relaxed state through the thread loosening mechanism;

[0038] S3, pull the sewn body and sewing thread out of the machine together;

[0039] S4. Cut the sutures on the suture body with scissors.

[0040] Compared with the prior art, the advantages of the present invention are:

[0041] (1) By providing a thread loosening mechanism that puts the suture in a timed loosening state or a fully loosened state and a control unit that controls the operation or power-off of the thread trimming mechanism, the multi-needle machine can switch between automatic thread trimming and manual thread trimming at will, thereby ultimately meeting the diversified needs of enterprises for multi-needle machines;

[0042] (2) By providing a lubricating box filled with thread oil, the thread oil adheres to the bottom thread during the bottom thread sewing process, making the bottom thread less likely to spread, thereby realizing the sewing operation of the bottom thread composed of multiple strands of thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a three-dimensional diagram of this scheme;

[0044] Figure 2 It is a three-dimensional diagram of the partial structure of the wire loosening mechanism;

[0045] Figure 3 It is a three-dimensional diagram of the thread trimming mechanism;

[0046] Figure 4 It is a three-dimensional diagram of the thread trimming mechanism from another direction;

[0047] Figure 5 This is a three-dimensional diagram of the lubrication box installed on the support frame;

[0048] Figure 6 It is a three-dimensional diagram of the structure of another part of the wire loosening mechanism.

[0049] In the figure, 1. machine table; 2. machine head; 3. thread trimming mechanism; 4. thread loosening mechanism; 5. control unit; 6. base; 7. first driving member; 8. moving knife group; 9. blocking block; 10. connecting plate; 11. moving knife; 12. upper thread blade; 13. lower thread blade; 14. thread loosening rack; 15. thread clamp; 16. first threading hole; 17. movable rod; 18. bending rod; 19. second driving member; 20. first connecting rod; 21. second connecting rod; 22. transmission rod; 23. third driving member; 24. thread passing rack; 25. second threading hole; 26. thread loosening member; 27. third threading hole; 28. supporting frame; 29. ​​fourth threading hole; 30. thread lubricating box; 31. thread passing groove. DETAILED DESCRIPTION

[0050] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0051] like Figures 1 to 6As shown, the present invention provides a multi-needle machine with switchable manual and automatic thread trimming, which has an automatic thread trimming state and a manual thread trimming state. The multi-needle machine includes: a machine table 1, a machine head 2, a sewing mechanism, a thread trimming mechanism 3, a thread loosening mechanism 4 and a control unit 5.

[0052] Among them, the machine head 2 is arranged on the machine table 1; the sewing mechanism is arranged on the machine head 2; the thread cutting mechanism 3 is arranged on the machine table 1 and is located below the sewing mechanism; the thread loosening mechanism 4 is connected to the surface of the machine head 2 and is used to put the suture in a timed loosening state or a fully relaxed state; the control unit 5 is electrically connected to the thread cutting mechanism 3 and is used to control the start and stop of the thread cutting mechanism 3.

[0053] When the multi-needle machine is in the automatic thread trimming state, the thread on the thread loosening mechanism 4 is in the timed thread loosening state, and the control unit 5 is used to control the thread trimming mechanism 3 to cut the thread on the sewing body; when the multi-needle machine is in the manual thread trimming state, the control unit 5 controls the thread trimming mechanism 3 to be in the power-off state, and the thread on the thread loosening mechanism 4 is in a fully relaxed state and can be moved together to the outside of the sewing mechanism when the sewing body is pulled out of the sewing mechanism, so that the multi-needle machine can perform manual thread trimming.

[0054] It should be noted that mechanical components for the operation of the sewing mechanism are provided in the machine head 2 (not shown in the figure). In this solution, by providing a loosening mechanism 4 that puts the suture in a timed loosening state or a fully relaxed state and a control unit 5 that controls the operation or power-off of the thread cutting mechanism 3, the multi-needle machine can switch between automatic thread cutting and manual thread cutting at will, thereby ultimately meeting the diversified needs of enterprises for multi-needle machines.

[0055] Specifically, the thread cutting mechanism 3 includes: a base 6; a first driving member 7, which is arranged on the base 6 and electrically connected to the control unit 5; a movable knife group 8, which is movably arranged on the base 6 and connected to the output end of the first driving member 7, the moving direction of the movable knife group 8 is arranged perpendicular to the moving direction of the suture, and the suture is in the moving path of the movable knife group 8; a blocking block 9, which is connected to the base 6, and when the first driving member 7 drives the movable knife group 8 to move, the blocking block 9 and the movable knife group 8 are movably abutted to enable the movable knife group 8 to cut the suture.

[0056] During operation, the first driving member 7 drives the movable knife group 8 to move relative to the blocking block 9. Since the suture is on the moving path of the movable knife group 8, the movable knife group 8 drives the suture to move when it moves. When the movable knife group 8 abuts against the blocking block 9, the suture is cut, thereby realizing the suture cutting operation of the movable knife group 8.

[0057] Furthermore, the movable knife group 8 includes a connecting plate 10 connected to the output end of the first driving member 7 and movable knives 11 spaced apart on the connecting plate 10 for cutting the upper thread and the lower thread. The connecting plate 10 is used for installing and fixing the movable knife 11. The movable knife 11 is provided with an upper thread blade 12 and a lower thread blade 13 along the moving direction of the movable knife group 8. The upper thread blade 12 is used to cut the upper thread on the seam body, and the lower thread blade 13 is used to cut the lower thread on the seam body. When the first driving member 7 drives the movable knife group 8 to move, the upper thread blade 12 and the lower thread blade 13 both pass over the blocking block 9.

[0058] Furthermore, the thread loosening mechanism 4 includes: a thread loosening frame 14, which is arranged on the side of the machine head 2, and a plurality of thread clamps 15 are distributed on one side of the thread loosening frame 14; a first threading hole 16, which is arranged on the other side of the thread loosening frame 14 and corresponds one to one with the thread clamp 15; a movable rod 17, which is movably arranged on the thread loosening frame 14, and a curved rod 18 is provided on the movable rod 17 between the thread clamp 15 and the first threading hole 16. The upper thread passes through the thread clamp 15, the curved rod 18 and the first threading hole 16 in turn, and the curved rod 18 is movably abutted against the upper thread to make the upper thread in a timed loosening state or a fully relaxed state.

[0059] During operation, one end of the upper thread is drawn out from the thread reel (not shown in the figure) and passes through the thread clamp 15, the curved rod 18 and the first threading hole 16 in sequence before entering the sewing mechanism for sewing operation. In the automatic thread trimming state, the curved rod 18 moves on the thread loosening frame 14 until it is pressed against the upper thread, driving the upper thread between the thread clamp 15 and the first threading hole 16 to be in a taut state. When the sewing of the seam is completed, the curved rod 18 moves a distance on the thread loosening frame 14 so that the suture has a loose length of about 5mm-10mm. This loose length is reserved for use in thread cutting. After the thread trimming is completed, the curved rod 18 is reset and continues to press against the upper thread.

[0060] During manual thread trimming, the upper thread between the thread clamp 15 and the first perforation is in a fully relaxed state. At this time, the thread clamp 15 is directly opened and will not restrict the movement of the upper thread, so that the upper thread can be pulled out of the sewing mechanism together with the seam body during the subsequent thread trimming process.

[0061] Furthermore, the wire loosening mechanism 4 also includes: a second driving member 19, which is connected to the machine head 2 and is located on the opposite side of the wire loosening frame 14; a first connecting rod 20, which is connected to the output end of the second driving member 19; a second connecting rod 21, which is rotatably set on the machine head 2, and one end of the second connecting rod 21 is connected to the movable rod 17; a transmission rod 22, one end of which passes through the machine head 2 and is connected to the second connecting rod, and the other end of the transmission rod 22 is connected to the first connecting rod 20.

[0062] like Figure 2As shown, when the second driving member 19 is working, it drives the first connecting rod 20 to rotate, and the transmission rod 22 converts the rotation of the first connecting rod 20 into the rotation of the second connecting rod 21. When the second connecting rod 21 rotates, it drives the movable rod 17 to move relative to the loosening frame 14, thereby realizing the tightening or loosening operation of the bending rod 18 on the surface line.

[0063] Furthermore, the thread-releasing mechanism 4 further comprises: a third driving member 23, which is connected to the machine head 2; a thread-passing frame 24, which is connected to the machine head 2 and is located below the third driving member 23, and a second thread-passing hole 25 is provided on the thread-passing frame 24; a thread-releasing member 26, which is movably arranged on the machine head 2 and connected to the output end of the third driving member 23, and two third thread-passing holes 27 are provided on the thread-releasing member 26, which are arranged opposite to each other. The bottom line passes through the third thread-passing hole 27 on one side of the thread-releasing member 26, the second thread-passing hole 25 and the third thread-passing hole 27 on the other side of the thread-releasing member 26 in sequence. When the third driving member 23 drives the thread-passing frame 24 to move on the machine head 2, it is used to drive the bottom line to be in a timed thread-releasing state or a fully relaxed state. Preferably, the multi-needle machine of this scheme further comprises a controller, the third driving member 23 is a motor, the controller is electrically connected to the third driving member 23, and the controller is used to control the opening and closing of the third driving member 23, so as to realize the timed thread-releasing state or the fully relaxed state of the curved rod 18 on the opposite line in the state of automatic thread trimming.

[0064] When the second threading hole 25 on the thread passing frame 24 and the two third threading holes 27 on the thread release member 26 are on the same horizontal plane, the bottom line passing through the thread passing frame 24 and the thread release member 26 is in a fully relaxed state. When the third driving member 23 drives the thread release member 26 to move downward, there is a height difference between the second threading hole 25 and the third threading hole 27, so that the bottom surface is in a timed thread release state. Preferably, the first driving member 7 and the second driving member 19 can be a cylinder, an oil cylinder or an electromagnet.

[0065] Furthermore, the present solution also includes: a support frame 28, which is connected to the machine head 2 and is located on the side of the wire passing frame 24, and two groups of oppositely arranged fourth wire threading holes 29 are provided on the support frame 28, and the fourth wire threading holes 29 are used for allowing the bottom line to pass through; a wire lubricating box 30, which is connected to the support frame 28, and the wire lubricating box 30 contains wire oil, and a wire passing groove 31 is provided on the wire lubricating box 30, and the bottom line passing through the wire passing groove 31 is adhered with wire oil.

[0066] When the bottom thread is a cotton thread or elastic thread composed of multiple strands of yarn, before connecting the bottom thread to the sewing mechanism, the bottom thread is passed through the fourth threading hole 29 and the thread groove 31 on the thread moistening box 30. During the sewing process of the bottom thread, the bottom thread can adhere to the thread oil in the thread moistening box 30 so that the bottom thread is not easy to spread out, thereby completing the normal sewing operation of the cotton thread or elastic thread composed of multiple strands of yarn.

[0067] Furthermore, the present invention also provides a manual thread trimming method, comprising the steps of:

[0068] S1, the control unit 5 cuts off the power supply of the thread trimming mechanism 3;

[0069] S2, the suture is in a fully relaxed state through the thread loosening mechanism 4;

[0070] S3, pulling the sewn body and the sewing thread out of the machine 1;

[0071] S4. Cut the sutures on the suture body with scissors.

[0072] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0073] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0074] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0075] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A multi-needle machine with switchable manual and automatic thread trimming, which has automatic thread trimming state and manual thread trimming state, characterized in that: The multi-needle machine comprises: a machine platform, on which a machine head is provided; a sewing mechanism, which is arranged on the machine head; a thread trimming mechanism, which is arranged on the machine head and below the sewing mechanism; A thread loosening mechanism, which is connected to the surface of the handpiece and is used to put the suture into a timed loosening state or a fully relaxed state; a control unit, which is electrically connected to the thread trimming mechanism and is used to control the start and stop of the thread trimming mechanism; When the multi-needle machine is in the automatic thread trimming state, the suture on the thread loosening mechanism is in a timed thread loosening state, and the control unit is used to control the thread trimming mechanism to cut the suture on the sewing body; When the multi-needle machine is in manual thread trimming state, the control unit controls the thread trimming mechanism to be in a power-off state, and the sutures on the thread loosening mechanism are in a fully relaxed state and can be moved to the outside of the sewing mechanism together when the sewing body is pulled out of the sewing mechanism.

2. A multi-needle machine with switchable manual and automatic thread trimming according to claim 1, characterized in that: The thread cutting mechanism comprises: base; a first driving member, which is disposed on the base and electrically connected to the control unit; a movable knife assembly, which is movably arranged on the base and connected to the output end of the first driving member, wherein the moving direction of the movable knife assembly is perpendicular to the moving direction of the suture, and the suture is located on the moving path of the movable knife assembly; A blocking block is connected to the base. When the first driving member drives the movable knife group to move, the blocking block and the movable knife group are movably abutted against each other to enable the movable knife group to cut the suture.

3. A multi-needle machine with switchable manual and automatic thread trimming according to claim 2, characterized in that: The movable knife group includes a connecting plate connected to the output end of the first driving member and movable knives spaced apart on the connecting plate. The movable knife is provided with an upper thread blade and a lower thread blade along the moving direction of the movable knife group. When the first driving member drives the movable knife group to move, the upper thread blade and the lower thread blade both pass over the blocking block to cut the upper thread and the lower thread.

4. A multi-needle machine with switchable manual and automatic thread trimming according to claim 1, characterized in that: The line loosening mechanism comprises: A wire loosening frame is provided on the side of the machine head, and a plurality of wire clamps are distributed on one side of the wire loosening frame; a first threading hole, which is provided on the other side of the wire loosening frame and corresponds one-to-one to the wire clamp; A movable rod is movably arranged on the thread loosening frame, and a curved rod is provided on the movable rod between the thread clamp and the first threading hole. The upper thread passes through the thread clamp, the curved rod and the first threading hole in sequence. The curved rod and the upper thread are movably abutted to put the upper thread in a timed thread loosening state or a fully relaxed state.

5. A multi-needle machine with switchable manual and automatic thread trimming according to claim 4, characterized in that: The line loosening mechanism further comprises: a second driving member connected to the machine head and located on the opposite side of the wire release frame; a first connecting rod connected to an output end of the second driving member; a second connecting rod, which is rotatably mounted on the machine head and has one end connected to the movable rod; A transmission rod, one end of which passes through the machine head and is connected to the second connecting rod, and the other end of the transmission rod is connected to the first connecting rod.

6. The multi-needle machine with switchable manual and automatic thread trimming according to claim 1, characterized in that: The line loosening mechanism further comprises: a third driving member connected to the handpiece; a wire-passing frame connected to the machine head and located below the third driving member, wherein the wire-passing frame is provided with a second threading hole; A thread loosening member is movably arranged on the machine head and connected to the output end of the third driving member. The thread loosening member is provided with two third threading holes arranged opposite to each other. The bottom line passes through the third threading hole on one side of the thread loosening member, the second threading hole and the third threading hole on the other side of the thread loosening member in sequence. When the third driving member drives the thread passing frame to move on the machine head, it is used to drive the bottom line to be in a timed thread loosening state or a fully relaxed state.

7. A multi-needle machine with switchable manual and automatic thread trimming according to claim 6, characterized in that: Also includes: A support frame connected to the machine head and located to the side of the thread passing frame, wherein the support frame is provided with two sets of fourth threading holes arranged opposite to each other, and the fourth threading holes are used for passing the bottom thread; A lubricating box is connected to the support frame. The lubricating box contains lubricating oil. A wire passing groove is provided on the lubricating box. The wire oil is adhered to the bottom line passing through the groove.

8. A manual thread trimming method, characterized in that: A multi-needle machine with switchable manual and automatic thread trimming as claimed in any one of claims 1 to 7, comprising the steps of: S1, cut off the power supply of the thread trimming mechanism through the control unit; S2, the suture is in a fully relaxed state through the thread loosening mechanism; S3, pull the sewn body and sewing thread out of the machine together; S4. Cut the sutures on the suture body with scissors.

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