A cutting device for a hosiery machine

Abstract

A kind of scissors device for hosiery machine, including sock sewing equipment, the scissors mechanism component of installation in sewing equipment, the scissors mechanism component includes first scissors blade and second scissors blade, first scissors blade is installed to first linear track, and is driven back and forth linear motion along first linear track by first driving device, second scissors blade is installed to second linear track, and is driven back and forth linear motion along second linear track by second driving device, first scissors blade and second scissors blade cross each other in the process of back and forth linear motion, and sock thread is cut at intersection.This utility model cuts sock thread by first scissors blade and second scissors blade cross each other in the process of back and forth linear motion, generates different direction shear force, avoids the technical problem that rotating shear force pulls thread from guide blade in the process of traditional rotary scissors cutting.

Description

Technical Field

[0001] This utility model relates to the field of sock knitting machinery technology, and in particular to a scissor device for a sock knitting machine. Background Technology

[0002] In existing publicly available technologies, the process of transferring socks from a sock-making machine to a sewing machine for toe sewing typically involves a sewing mechanism and a scissor device. The technical solution with patent number CN200980120878.6 involves a scissor structure whose thread-cutting motion is parallel to the axial rotation of the upper sewing needle. After cutting the thread, the scissor assembly moves towards the rear of the guide plate, and its direction of movement is consistent with the direction in which the sewing mechanism 1 exits the sewing operation. In practical use, this scissor assembly device frequently encounters situations where the scissors occasionally fail to completely cut the thread, pulling the thread off the guide plate and causing subsequent sewing failures, resulting in defective fabric and machine downtime. How to avoid these technical problems is a subject of study for those skilled in the art. Utility Model Content

[0003] This invention provides a scissor device for a sock knitting machine. By cutting in different directions, it prevents the sewing thread from being pulled off the guide plate and affecting subsequent sewing work, even if the scissors occasionally fail to completely cut the sewing thread.

[0004] A scissor device for a sock knitting machine includes sock sewing equipment and a scissor mechanism assembly installed on the sewing equipment. The scissor mechanism assembly includes a first scissor blade and a second scissor blade. The first scissor blade is mounted on a first linear track and moves linearly back and forth along the first linear track by a first drive device. The second scissor blade is mounted on a second linear track and moves linearly back and forth along the second linear track by a second drive device. The first and second scissor blades intersect each other during their linear movements, cutting the sock seam thread at the intersection. This scissor device for a sock knitting machine uses linearly moving first and second scissor blades that intersect during their linear movements to cut the sock seam thread. This not only provides a good cutting effect and reduces the likelihood of not being able to cut the thread completely, but even in rare cases where the thread cannot be cut, it will not pull the thread hanging on the guide plate. Because the cutting direction is not a rotational direction, the thread cannot be rotated around the guide plate, avoiding subsequent sewing failures, defective fabric, and machine downtime caused by pulling the thread off.

[0005] The first driving device includes a first piston rod, which drives the first scissor blade to move along the first linear track. The power source for the first piston rod can be a cylinder or hydraulic cylinder, etc., using existing technology to drive its back-and-forth movement, achieving the technical objective of moving the first scissor blade along the first linear track. The first scissor blade includes a first protrusion and a second protrusion located on the outer sides of both ends of the first linear track. A third protrusion is connected to the side of the second protrusion, and the third protrusion is connected to one end of a first return spring. The other end of the first return spring is installed in a first mounting hole inside the main body plate of the first linear track. The first return spring, combined with the first piston rod, pushes the first scissor blade to reciprocate along the first linear track. This design is not only energy-efficient but also has a low failure rate and reliable movement performance.

[0006] The first linear track is located on the side of the main body plate of the first linear track. The first scissor blade is embedded in the first linear track. The outer side of the first scissor blade is limited by the first cover plate to prevent it from detaching from the first linear track. The first cover plate is fixedly connected to the main body plate of the first linear track to ensure that the first scissor blade can only run along the first linear track, thereby improving the stability of the movement.

[0007] The second driving device includes a second piston rod, which drives the second scissor blade to move along the second linear track. The power source for the second piston rod can be a cylinder or hydraulic cylinder, etc., using existing technology to drive its back-and-forth movement, achieving the technical objective of moving the second scissor blade along the second linear track. The second scissor blade includes a fourth protrusion and a seventh protrusion located at the outer ends of the second linear track. The seventh protrusion is connected to one end of a second return spring, and the other end of the second return spring is installed in a second mounting hole in the main body plate of the second linear track. The second return spring, in conjunction with the second piston rod, pushes the second scissor blade to reciprocate along the second linear track, resulting in an energy-efficient structure with a low failure rate and reliable motion performance. The main body plate of the second linear track has a third mounting hole for installing the second piston rod, which drives an eighth protrusion located on the side of the second scissor blade. The eighth protrusion, as a structural optimization, drives the second scissor blade from the side, avoiding structural interference and improving the overall spatial design performance of the second driving device.

[0008] The second linear track is located on the side of the main body plate of the second linear track. The second scissor blade is embedded in the second linear track. The outer side of the second scissor blade is limited by the second cover plate to prevent it from detaching from the second linear track. The second cover plate is fixedly connected to the main body plate of the second linear track to ensure that the second scissor blade can only run along the second linear track, thereby improving the stability of the movement.

[0009] The fourth protrusion of the second scissor blade has a V-shaped opening in its cross-section. After the first and second scissor blades move back and forth in a straight line, intersecting and cutting the thread, the sock sewing device pulls off any remaining thread that was not completely cut when it moves along the first drive rod to exit the sewing operation. Simultaneously, the thread on the guide plate will not fall off. The V-shaped opening of the fourth protrusion of the second scissor blade not only provides excellent cutting ability as a cutting edge, but also supports the thread during cutting, further preventing the thread on the guide plate from falling off.

[0010] The sock sewing equipment includes a first sewing needle and a second sewing needle that rotate and cooperate to sew the toe of the sock. The rotation direction of the first and second sewing needles to sew the toe of the sock, the direction of the guide plate to guide the sewing thread, and the cutting direction of the first and second scissor blades to cut the sock sewing thread are all different. By applying force in different directions, the sewing thread is prevented from detaching from the guide plate, thereby improving the sewing thread cutting effect.

[0011] This invention uses the linear motion of the first and second scissor blades to cut the sock seam thread by cross-cutting, generating shearing forces in different directions. This avoids the technical problem of the rotational shearing force pulling the seam thread off the guide plate during the traditional rotary scissor cutting process. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of a scissor device for a sock knitting machine according to the present invention; Figure 2 This is a partial cross-sectional view of a scissor device for a sock knitting machine according to the present invention; Figure 3 This is a schematic diagram of the exploded installation structure of the scissor mechanism component in this utility model; Figure 4 This is a schematic diagram of the working state of a scissor device for a sock knitting machine when waiting to cut threads, according to the present invention. Figure 5 This is a schematic diagram illustrating the operation of a scissor device for a sock knitting machine during thread cutting, according to the present invention. Figure 6 This is a schematic diagram of the working process of a scissor device for a sock knitting machine during thread cutting according to the present invention; Figure 7 This is a schematic diagram illustrating the working process of the sock sewing equipment retracting after the scissor device for a sock knitting machine completes the thread cutting.

[0013] The components of this utility model are numbered as follows: sewing equipment 1, first sewing needle 2, second sewing needle 3, guide wire 4, scissor mechanism assembly 5, second scissor blade 6, first scissor blade 7, sock needle 14, sock sewing thread 41, first linear track main plate 50, first drive rod 51, third mounting hole 52, first linear track 53, second cover plate 54, second linear track 55, second linear track main plate 56, second mounting hole 57, eighth protrusion 61, second piston rod 62, second return spring 63, fourth protrusion 66, seventh protrusion 67, first return spring 71, first cover plate 72, first protrusion 78, second protrusion 77, third protrusion 76, first mounting hole 97. Detailed Implementation

[0014] The following is in conjunction with the appendix Figure 1-7 The specific implementation method further illustrates the technical solution of this patent.

[0015] like Figure 1 The diagram illustrates a scissor device for a sock knitting machine, comprising a sock sewing device 1 and a scissor mechanism assembly 5 mounted on the sewing device 1. The sewing device 1 and the scissor mechanism assembly 5 are mutually compatible. The sewing device 1 primarily sews the toe of socks after knitting, especially in integrated sock knitting and sewing machines. This type of sewing device 1 is now quite common. It achieves the sewing of the sock toe by rotating a first sewing needle 2 and a second sewing needle 3. The sewing device 1 is mounted on a retractable frame formed by two first drive rods 51. The first drive rods 51 drive the entire sewing device 1 forward and backward, thereby achieving the sewing function of the sock toe. Here, it is required that the sewing device 1 and the scissor mechanism assembly 5 are a single, integrated structure to achieve synchronous sewing and thread cutting.

[0016] To avoid the technical problem of the rotating shearing force pulling the suture off the guide plate during the traditional rotary scissors suture cutting process, such as Figure 2 He Ru Figure 3 The scissor mechanism assembly 5 shown includes a first scissor blade 7 and a second scissor blade 6. The first scissor blade 7 is mounted on a first linear track 53 and is driven to move back and forth linearly along the first linear track 53 by a first drive device. The second scissor blade 6 is mounted on a second linear track 55 and is driven to move back and forth linearly along the second linear track 55 by a second drive device. During their back and forth linear movements, the first scissor blade 7 and the second scissor blade 6 intersect each other, and at the intersection, the sock seam thread 41 is cut. This method, where the two scissor blades move in a linear intersecting motion, cuts the seam thread at the intersection, which is a significant improvement over traditional scissor rotation cutting. It offers faster cutting speed, better cutting effect, and is more suitable for high-speed sock machines. Moreover, the cutting angle and direction are different from the stitching direction of the two needles in the sewing device 1, avoiding the technical problem of the seam thread being pulled out of the guide plate 4 in the same direction.

[0017] As a preferred embodiment with other technical structures unchanged, the first driving device includes a first piston rod that drives the first scissor blade 7 to move along the first linear track 53. The first scissor blade 7 includes a first protrusion 78 and a second protrusion 77 located on the outer sides of both ends of the first linear track 53. A third protrusion 76 is connected to the side of the second protrusion 77. The third protrusion 76 is connected to one end of a first return spring 71. The other end of the first return spring 71 is installed in a first mounting hole 97 inside the main body plate 50 of the first linear track. The first linear track 53 is located on the side of the main body plate 50. The first scissor blade 7 is embedded in the first linear track 53. The outer side of the first scissor blade 7 is limited by a first cover plate 72 to prevent it from detaching from the first linear track 53. The first cover plate 72 is fixedly connected to the main body plate 50 of the first linear track. The above technical structure achieves the technical effect of the first piston rod combined with the first return spring 71 driving the first scissor blade 7 to reciprocate along the first linear track 53. It ensures stable performance at high speeds without shaking and avoids the problem of poor cutting effect caused by the increased gap between the rotating shaft and the mounting hole of the scissor blade in traditional scissors.

[0018] As a preferred structural embodiment with other technical structures unchanged, the second driving device includes a second piston rod 62, which drives the second scissor blade 6 to move along the second linear track 55. The second scissor blade 6 includes a fourth protrusion 66 and a seventh protrusion 67 located at the outer ends of the second linear track 55, respectively. The seventh protrusion 67 is connected to one end of the second return spring 63, and the other end of the second return spring 63 is installed in the second mounting hole 57 of the second linear track body plate 56. The second linear track body plate 56 has a third mounting hole 52 for installing the second piston rod 62, which drives an eighth protrusion 61 located on the side of the second scissor blade 6. The second linear track 55 is located on the side of the second linear track body plate 56. The second scissor blade 6 is embedded in the second linear track 55, and the outer side of the second scissor blade 6 is limited by a second cover plate 54 to prevent it from detaching from the second linear track 55. The second cover plate 54 is fixedly connected to the second linear track body plate 56. The above-mentioned technical structure achieves the technical effect of driving the second piston rod, combined with the second return spring 63, to drive the second scissor blade 6 to reciprocate along the second linear track 55. The performance is stable under high-speed movement and there will be no shaking or other problems. It also avoids the problem of poor cutting effect caused by the increased gap between the rotating shaft and the scissor mounting hole of traditional scissors.

[0019] To further prevent the stitching on the guide plate 4 from coming off, the fourth protrusion 66 of the second scissor blade 6 has a V-shaped opening in cross section. After the first scissor blade 7 and the second scissor blade 6 move back and forth in a straight line and cut the stitching, the sock sewing equipment 1 moves along the first drive rod 51 to exit the sewing work and pulls off the stitching 41 that was not completely cut. At the same time, the stitching on the guide plate 4 will not fall off.

[0020] like Figure 4-7 The diagram illustrates the dynamic changes of the scissor device for a sock knitting machine, from the waiting-to-cut state, the preparing-to-cut state, the completed-cut state, and the retracted state of the sock sewing equipment 1 after the cut. Finally, after the sock sewing equipment 1 completely retracts, the sewing thread 41 breaks into two sections. One section engages with the guide plate 4, and the other section engages with the sock needle 14, enabling continuous operation of the sock machine and reducing downtime. The sock sewing equipment 1 includes a first sewing needle 2 and a second sewing needle 3 that rotate and cooperate to sew the sock toe. The rotation direction of the first sewing needle 2 and the second sewing needle 3 to sew the sock toe, the direction of the guide plate 4 guiding the sewing thread, and the cutting direction of the first scissor blade 7 cooperating with the second scissor blade 6 to cross and cut the sock sewing thread 41 are all different. This solves the technical problem of the rotational shearing force pulling the sewing thread off the guide plate during the traditional rotary scissor cutting process.

[0021] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A scissor device for a sock knitting machine, comprising a sock sewing device (1) and a scissor mechanism assembly (5) mounted on the sewing device (1), characterized in that: The scissor mechanism assembly (5) includes a first scissor blade (7) and a second scissor blade (6). The first scissor blade (7) is mounted on a first linear track (53) and moves back and forth linearly along the first linear track (53) driven by a first driving device. The second scissor blade (6) is mounted on a second linear track (55) and moves back and forth linearly along the second linear track (55) driven by a second driving device. The first scissor blade (7) and the second scissor blade (6) intersect each other during their back and forth linear movements, and the intersection cuts the sock seam (41). The first driving device includes a first piston rod, which drives the first piston rod to cut the sock seam (41). The first scissor blade (7) moves along the first linear track (53); the second driving device includes a second piston rod (62), which drives the second scissor blade (6) to move along the second linear track (55); the sock sewing equipment (1) includes a first sewing needle (2) and a second sewing needle (3) that rotate and cooperate to sew the toe of the sock. The rotation direction of the first sewing needle (2) and the second sewing needle (3) to sew the toe of the sock, the direction of the guide plate (4) to guide the sewing thread, and the cutting direction of the first scissor blade (7) cooperating with the second scissor blade (6) to cross-cut the sock sewing thread (41) are all different.

2. The scissor device for a sock knitting machine according to claim 1, characterized in that: The first scissor blade (7) includes a first protrusion (78) and a second protrusion (77) located on the outside of both ends of the first linear track (53). The second protrusion (77) is connected to a third protrusion (76) on its side. The third protrusion (76) is connected to one end of the first reset spring (71). The other end of the first reset spring (71) is installed in the first mounting hole (97) inside the main body plate (50) of the first linear track.

3. A scissor device for a sock knitting machine according to claim 1, characterized in that: The first linear track (53) is located on the side of the first linear track main plate (50), the first scissor blade (7) is embedded in the first linear track (53), the outer side of the first scissor blade (7) is limited by the first cover plate (72) to prevent it from detaching from the first linear track (53), and the first cover plate (72) is fixedly connected to the first linear track main plate (50).

4. A scissor device for a sock knitting machine according to claim 1, characterized in that: The second scissor blade (6) includes a fourth protrusion (66) and a seventh protrusion (67) located on the outside of both ends of the second linear track (55). The seventh protrusion (67) is connected to one end of the second reset spring (63), and the other end of the second reset spring (63) is installed in the second mounting hole (57) of the main body plate (56) of the second linear track.

5. A scissor device for a sock knitting machine according to claim 4, characterized in that: The second linear track main plate (56) is provided with a third mounting hole (52) for mounting the second piston rod (62), and the second piston rod (62) drives the eighth protrusion (61) located on the side of the second scissor blade (6).

6. A scissor device for a sock knitting machine according to claim 4, characterized in that: The second linear track (55) is located on the side of the main body plate (56) of the second linear track. The second scissor blade (6) is embedded in the second linear track (55). The outer side of the second scissor blade (6) is limited by the second cover plate (54) to prevent it from detaching from the second linear track (55). The second cover plate (54) is fixedly connected to the main body plate (56) of the second linear track.

7. A scissor device for a sock knitting machine according to claim 1, characterized in that: The fourth protrusion (66) of the second scissor blade (6) has a V-shaped opening in cross section. After the first scissor blade (7) and the second scissor blade (6) move back and forth in a straight line and cross each other to cut the thread and close together, the sock sewing equipment (1) moves along the first drive rod (51) to exit the sewing work and pulls off the stitching thread (41) that was not completely cut. At the same time, the stitching thread on the guide plate (4) will not fall off.

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