Automatic thread trimming device for sewing thread belts

Abstract

The utility model discloses an automatic thread trimming device for sewing thread belts, which comprises a rotating cylinder, a thread trimming mechanism and a thread trimming mechanism, and is characterized in that the rotating cylinder provides back-and-forth swinging force; pneumatic scissors; the axial screws are used for fixing; the parallel four-connecting-rod comprises a first driving connecting rod and a second driving connecting rod, and the two ends of the first driving connecting rod and the two ends of the second driving connecting rod are arranged on the rotating air cylinder and the pneumatic scissors respectively; one end of the moving swing rod is vertically mounted on an output shaft of the rotating cylinder, and the other end of the moving swing rod is fixed on the first driving connecting rod through the axial position screw; the rotating air cylinder drives the moving swing rod to swing back and forth, then the parallel four-bar linkage is driven to do reciprocating motion, and the pneumatic scissors can conduct feeding and shearing repeatedly.

Description

Technical Field

[0001] The present application relates to the field of sewing technology, and in particular to an automatic thread trimming device for sewing thread tapes. Background Art

[0002] In the process of sewing wires and tapes such as heating wires, decorative wires and elastic bands onto fabrics, each time a piece of fabric is sewn, the wires and tapes need to be cut off, either manually or by pneumatic shears. Manual wire cutting is inefficient and not suitable for automated production. Existing pneumatic shears have an oblique feed, which is not suitable for shearing strip materials, and the scissor tips are prone to rubbing and damaging the sewn fabric.

[0003] Therefore, how to make pneumatic scissors more suitable for cutting strip materials and prevent the scissor tips from being scratched or damaged due to oblique cutting? The utility model provides an automatic thread trimming device for sewing thread strips, which can effectively solve the problems existing in the above sewing machines.

[0004] The above contents are only used to assist in understanding the technical solution of the present application, and do not constitute an admission that the above contents are the closest prior art to the present application. Summary of the invention

[0005] Based on this, the present application provides an automatic thread trimming device for sewing thread tapes to solve one of the above-mentioned technical problems.

[0006] The technical solution adopted by the present application to solve its technical problems is, including: a rotating cylinder, providing a force for swinging back and forth; pneumatic scissors; a plurality of axial screws for fixing; a parallelogram linkage, including a first driving link and a second driving link, wherein the first driving link and the second driving link are respectively arranged at both ends on the rotating cylinder and the pneumatic scissors; a moving rocker, one end of which is vertically mounted on the output shaft of the rotating cylinder, and the other end is fixed to the first driving link by the axial screw; wherein the rotating cylinder drives the moving rocker to swing back and forth, thereby driving the parallelogram linkage to perform reciprocating motion, so that the pneumatic scissors can feed and shear repeatedly.

[0007] In some embodiments, a rotating cylinder seat is provided on the rotating cylinder.

[0008] In some embodiments, the parallelogram linkage further includes a connecting rod pad and a scissor seat, wherein the connecting rod pad is fixed on the rotating cylinder seat, and the scissor seat is fixed on the pneumatic scissors.

[0009] In some embodiments, a long hollow groove is opened in the middle of the first driving connecting rod, the axial screw passes through the hollow groove and is connected to the moving rocker arm, and the two ends are respectively fixed to the front end of the rotating cylinder seat and the front end of the scissors seat by the axial screw.

[0010] In some embodiments, both ends of the second driving connecting rod are respectively fixed to the rear end of the rotating cylinder seat and the rear end of the scissor seat using the axial screws.

[0011] In some embodiments, a circular step is provided at one end of the motion rocker connected to the axial screw.

[0012] In some embodiments, the width between the end surface of the circular step and the inner end surface of the axial screw is greater than the thickness of the first driving link and the second driving link.

[0013] The beneficial effect of the present application is that the device adopts a parallel four-bar linkage mechanism, and the rotating cylinder controls the movement of the parallel four-bar linkage mechanism, so that the scissors move horizontally to the cutting position, thereby avoiding the friction phenomenon of traditional oblique feed scissors during the cutting process, and effectively protecting the sewn fabric from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a three-dimensional schematic diagram of this application.

[0016] Figure 2 It is a side view of the present application.

[0017] Figure 3 It is a three-dimensional schematic diagram of the motion swing rod of the present application.

[0018] Explanation of the accompanying drawings: 1. Rotating cylinder; 11. Rotating cylinder seat; 2. Pneumatic scissors; 3. Axial screw; 4. Parallel four-bar linkage; 41. First driving connecting rod; 411. Hollow groove; 42. Second driving connecting rod; 43. Connecting rod pad; 44. Scissors seat; 5. Motion rocker; 51. Circular step. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to achieve. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection of this application.

[0020] In the embodiments of this application, please refer to Figure 1-3 As shown, the present application provides an automatic thread trimming device for sewing thread tapes, which mainly includes: a rotating cylinder 1, which provides a force for swinging back and forth; a pneumatic scissors 2; a plurality of axial screws 3 for fixing; a parallelogram 4, including a first driving link 41 and a second driving link 42, wherein the first driving link 41 and the second driving link 42 are respectively arranged at both ends on the rotating cylinder 1 and the pneumatic scissors 2; a moving rocker 5, one end of which is vertically mounted on the output shaft of the rotating cylinder 1, and the other end is fixed to the first driving link 41 by the axial screw 3; wherein the rotating cylinder 1 drives the moving rocker 5 to swing back and forth, thereby driving the parallelogram 4 to perform reciprocating motion, so that the pneumatic scissors 2 can feed and shear repeatedly.

[0021] Through the stable power output of the rotating cylinder 1, the swing amplitude and frequency of the moving swing arm 5 can be accurately controlled to ensure the smoothness of each shearing action. Due to the parallel four-bar linkage 4 transmission, the movement trajectory of the scissors during the shearing process is more in line with the shearing requirements of wire and tape materials, avoiding the friction and damage that may be caused by oblique shearing.

[0022] Some preferred / improved embodiments based on the above embodiments will be described below. Any one of the following embodiments may be selected, or multiple embodiments may be selected and combined.

[0023] Reference Figure 2 As shown, the rotary cylinder 1 is provided with a rotary cylinder seat 11 , which ensures that the rotary cylinder 1 remains stable during operation, reduces vibration and deviation, and improves the accuracy and reliability of the driving action of the rotary cylinder 1 .

[0024] Reference Figure 1 As shown, the parallelogram linkage 4 also includes a linkage pad 43 and a scissor seat 44. The linkage pad 43 is fixed on the rotating cylinder seat 11, and the scissor seat 44 is fixed on the pneumatic scissors 2. This arrangement enables the parallelogram linkage 4 to better fit the rotating cylinder 1 and the starting scissors, thereby enhancing the shearing effect and the overall rigidity of the equipment.

[0025] Furthermore, a long hollow groove 411 is opened in the middle of the first driving connecting rod 41, and the axial screw 3 passes through the hollow groove 411 to be connected to the moving rocker 5, and the two ends are respectively fixed to the front end of the rotating cylinder seat 11 and the front end of the scissor seat 44 by the axial screw 3. The hollow groove 411 enables the moving rocker 5 to drive the parallel four-link 4 to move.

[0026] Specifically, the two ends of the second driving connecting rod 42 are respectively fixed to the rear end of the rotating cylinder seat 11 and the rear end of the scissor seat 44 by using the axial screws 3, thereby ensuring the stability of the parallelogram 4.

[0027] Preferably, one end of the motion rocker arm 5 connected to the axial screw 3 is provided with a circular step 51. The design of the circular step 51 makes the motion rocker arm 5 more stable when swinging, and reduces vibration during the swinging process.

[0028] Specifically, the width between the end face of the circular step 51 and the inner end face of the axial screw 3 is greater than the thickness of the first drive link 41 and the second drive link 42. This arrangement enhances the strength of the connection part and prevents breakage or deformation due to stress concentration.

[0029] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present application, and the aforementioned embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An automatic thread trimming device for sewing thread tapes, characterized in that: include: A rotating cylinder provides the force for the back and forth swing; Pneumatic scissors; Several axial screws for fixing; A parallelogram linkage, comprising a first driving linkage and a second driving linkage, wherein two ends of the first driving linkage and the second driving linkage are respectively arranged on the rotary cylinder and the pneumatic scissors; A motion swing rod, one end of which is vertically mounted on the output shaft of the rotary cylinder, and the other end of which is fixed to the first driving connecting rod through the axial screw; The rotating cylinder drives the moving swing rod to swing back and forth, thereby driving the parallel four-link to perform reciprocating motion, so that the pneumatic scissors can feed and cut repeatedly.

2. The automatic thread trimming device for thread and tape sewing according to claim 1, characterized in that: The rotary cylinder is provided with a rotary cylinder seat.

3. The automatic thread trimming device for thread and tape sewing according to claim 2, characterized in that: The parallel four-bar linkage also includes a connecting rod pad and a scissor seat. The connecting rod pad is fixed on the rotating cylinder seat, and the scissor seat is fixed on the pneumatic scissors.

4. The automatic thread trimming device for thread and tape sewing according to claim 3, characterized in that: A long hollow groove is opened in the middle of the first driving connecting rod, and the axial screw passes through the hollow groove and is connected to the moving swing arm. The two ends are respectively fixed to the front end of the rotating cylinder seat and the front end of the scissor seat by the axial screw.

5. The automatic thread trimming device for thread and tape sewing according to claim 4, characterized in that: The two ends of the second driving connecting rod are respectively fixed to the rear end of the rotating cylinder seat and the rear end of the scissor seat by using the axial screws.

6. The automatic thread trimming device for thread and tape sewing according to claim 5, characterized in that: One end of the motion rocker connected to the axial screw is provided with a circular step.

7. The automatic thread trimming device for thread and tape sewing according to claim 6, characterized in that: The width between the end surface of the circular step and the inner end surface of the axial screw is greater than the thickness of the first driving connecting rod and the second driving connecting rod.

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