Yarn nozzle mechanism for sewing tubular fabric

Abstract

The utility model discloses a yarn feeder mechanism for sewing tubular fabrics, which comprises a yarn feeder rod and a yarn feeder, the yarn feeder is fixed at the front end of the yarn feeder rod, and a sewing thread can penetrate out of the yarn feeder; the yarn feeder further comprises a yarn feeder rod support, a yarn feeder rod supporting piece is arranged in the yarn feeder rod support, and the yarn feeder rod supporting piece is cylindrical and is matched with the yarn feeder rod support in a rotating mode. A through hole is formed in the radial direction of the yarn feeder rod supporting piece, and the yarn feeder rod penetrates through the through hole and is in sliding fit with the yarn feeder rod supporting piece; the middle part of the yarn feeder rod is arranged in the yarn feeder rod supporting piece in a penetrating manner; and the tail part of the yarn feeder rod is eccentrically and movably connected to the yarn feeder rod driving wheel. The suture needle is suitable for the scheme that only one needle is used for suturing, the movement of the suture needle can be ensured to be inevitably intersected with the track surface of the suture, and the suture is smoothly hooked.

Description

Technical Field

[0001] The utility model belongs to the technical field of knitting machines, and particularly relates to a yarn nozzle mechanism for sewing tubular fabrics. Background Technique

[0002] Tubular fabrics usually refer to socks, and one end of them needs to be sewn after knitting. The most mainstream sewing equipment and methods at present are recorded in CN102046873A and its related applications. The technical solution is as follows: A sewing or crochet head specifically for automatically closing a tubular knitted fabric at one of its axial ends, the sewing or crochet head comprising: a pair of sewing members (2, 3), the pair of sewing members being movable along respective actuation paths and cooperating with each other to form a sewn chain stitch (30); and a cutting member (10), the cutting member (10) being actuable to cut the sewn chain stitch (30), characterized in that the cutting member (10) can cooperate with the sewn chain stitch (30) at a distance from the point where the sewn chain stitch (30) is formed or from the intersection of the paths of the pair of sewing members (2, 3), the distance being between 3 mm and 15 mm, the sewing members comprising: a needle (2) and a crochet hook (3), the needle (2) and the crochet hook (3) being movable along respective intersecting actuation paths to form the sewn chain stitch (30); a support hook (6), the support hook (6) being arranged to support the sewn chain stitch (30) being formed, and being arranged near the intersection of the actuation paths and oriented such that the tip (6a) of the support hook is oriented along the travel direction (40) of the object being sewn or crocheted, the cutting member (10) being able to cooperate with the sewn chain stitch (30) near the tip (6a) of the support hook (6) of the sewn chain stitch (30).

[0003] The needle (2) and the crochet hook (3) that constitute the above-mentioned sewing members, as well as the support hook (6), are generally commonly referred to as large needles, small needles, and steel skin needles in China. Before starting the sewing operation, the socks have been hooked on the sewing teeth of the sewing tooth disc, and the sewing tooth disc is folded in half along its diameter into a semi-circle of 180 0 so that there are two coils to be sewn on one sewing tooth. Then the large needle and the small needle each carry a sewing thread, and a stitch is formed at the intersection of their trajectories. The folded sewing tooth disc rotates forward to cooperate with the formed stitch, so that the stitch stitches the two coils on the sewing teeth together. During the gap between two sewing operations, it depends on the steel skin needle to support the stitch so that it will not fall apart.

[0004] In the above-mentioned prior art, the sewing threads are provided by the yarn nozzles. Since the large needle and the small needle each carry a sewing thread, two yarn nozzles are also required, which are respectively fixed in appropriate positions to lead out the sewing threads and supply them to the large needle or the small needle.

[0005] In another solution for sewing tubular fabrics, only one needle and one thread are used to complete the sewing. In this case, a fixed yarn guide mechanism cannot be used, and the yarn guide needs to move, so that the trajectory of the sewing thread also moves, ensuring that the sewing needle can hook the sewing thread. Summary of the Invention

[0006] The purpose of the present utility model is to provide a yarn guide mechanism for sewing tubular fabrics, which can be applied to the sewing solution of one needle and one thread.

[0007] The present utility model adopts the following technical solution: A yarn guide mechanism for sewing tubular fabrics, including a yarn guide rod and a yarn guide. The yarn guide is fixed at the front end of the yarn guide rod for the sewing thread to pass through the yarn guide. It is characterized in that: it further includes a yarn guide rod support seat, in which a yarn guide rod support member is provided. The yarn guide rod support member is cylindrical and rotatably matched with the yarn guide rod support seat; a through hole is radially opened in the yarn guide rod support member for the yarn guide rod to pass through and be slidably matched with the yarn guide rod support member; the middle part of the yarn guide rod is disposed through the yarn guide rod support member; the tail of the yarn guide rod is eccentrically and movably connected to the yarn guide rod driving wheel.

[0008] When the present utility model works, the yarn guide rod driving wheel rotates. Since the tail of the yarn guide rod is eccentrically connected to the yarn guide rod driving wheel, the tail of the yarn guide rod will generate a circular motion; at the same time, on the one hand, the middle part of the yarn guide rod performs a translational motion relative to the yarn guide rod support member, and on the other hand, it pushes the yarn guide rod support member to rotate relative to the yarn guide rod support seat. The superposition of these two motions makes the front end of the yarn guide rod, that is, the yarn guide, generate a motion with a closed trajectory similar to a circle. Since the sewing thread has extended from the yarn guide and is hooked on the sewing needle at this time, with the movement of the yarn guide, the sewing thread forms a trajectory surface similar to a cone, so that it can be ensured that the next movement of the sewing needle will necessarily intersect with the trajectory surface of the sewing thread and smoothly hook the sewing thread. Brief Description of the Drawings

[0009] Figure 1 is the structural schematic diagram of this embodiment.

[0010] Figure 2 is the schematic diagram of the sewing needle and the driving mechanism in this embodiment.

[0011] Figure 3 is Figure 2 the exploded schematic diagram of

[0012] Figure 4 is the schematic diagram of the yarn guide and the presser foot in the embodiment.

[0013] Figure 5 is Figure 4 the exploded schematic diagram of

[0014] The reference numerals in the drawings are as follows: 1 - serrated disk; 10 - serrated needle; 2 - main transmission shaft; 20 - main gear; 3 - first support; 31 - first transverse transmission shaft; 311 - bevel gear; 312 - driving gear of the first transverse transmission shaft; 32 - first longitudinal rod; 33 - second transverse rod; 331 - end sleeve of the second transverse rod; 34 - eccentric connecting rod; 35 - limit seat of the sewing needle rod; 38 - driving cylinder of the first support; 39 - reset part of the first support; 4 - second support; 41 - upper part of the second support; 42 - middle part of the second support; 43 - lower part of the second support; 5 - sewing needle rod; 51 - sewing needle; 52 - second limiting part; 53 - universal wheel; 6 - yarn nozzle rod; 61 - yarn nozzle; 62 - driving gear of the yarn nozzle rod; 63 - driven gear of the yarn nozzle rod; 64 - support of the yarn nozzle rod; 65 - support member of the yarn nozzle rod; 66 - driving wheel of the yarn nozzle rod; 67 - tail of the yarn nozzle rod; 7 - presser foot rod; 71 - presser foot; 72 - driving cylinder of the presser foot rod; 8 - scissor device.

[0015] The reference numerals appearing in the background art section are direct references to the documents and have nothing to do with the drawings of this specification. Specific Embodiment

[0016] See Figures 1 to 3 This embodiment includes a serrated disk 1, on which serrated needles 10 are arranged; in Figure 1 the state shown, the annular serrated disk has been folded into a semi-annular shape of 180°, and two loops of socks have been hooked on each serrated needle. At this time, the upper semi-ring has nothing to do with the purpose of the invention, so only the lower semi-ring is shown in the figure. During the sewing process, the serrated disk 1 rotates counterclockwise.

[0017] The main transmission shaft 2 and all the components provided thereon are arranged in the adjacent area of the serrated disk. As can be seen from the figure, the first support 3 is an important platform, and a large number of components are directly or indirectly arranged on the first support 3. The first support 3 itself is sleeved on the main transmission shaft 2 and rotates at a certain angle around the main transmission shaft 2 under the combined action of the driving cylinder 38 of the first support and the reset part 39 of the first support. The driving cylinder of the first support has several set piston strokes to control the distance of pushing the first support, and the reset part of the first support has elasticity to reversely push the first support when the piston retracts. Thus, the first support 3 has three set positions, namely the first working position, the second working position and the non-working position. In the non-working position, the first support 3 is relatively far away from the serrated disk 1. From a top view, at this time, the presser foot 71 is outside the serrated disk 1, and the sewing needle 51 is separated from the serrated needle 10; in the first working position and the second working position, the first support 3 is relatively close to the serrated disk 1. From a top view, at this time, the presser foot 71 is inside the serrated disk 1. Among them, in the first working position, the sewing needle 51 coincides with the longitudinal groove of the serrated needle 10, and in the second working position, the sewing needle 51 is separated from the serrated needle 10.

[0018] A first longitudinal rod 32 is provided on the first support. The shape of the second support 4 is as Figure 3 shown, having an upper part 41, a middle part 42 and a lower part 43. There are two connection relationships between the first support 3 and the second support 4, namely a first transverse transmission shaft 31 and a second transverse rod 33. There is also an eccentric connecting rod 34 between the first transverse transmission shaft 31 and the second support 4; one end of the first transverse transmission shaft 31 is a bevel gear 311, which meshes with a first transverse transmission shaft driving gear 312 sleeved on the main transmission shaft 2, and the other end is rotatably matched with the eccentric connecting rod 34. The upper part 41 of the second support 4 is also rotatably matched with the eccentric connecting rod 34, that is, the upper part 41 of the second support is rotatably connected to the first transverse transmission shaft 31 non-coaxially and is driven by it; one end of the second transverse rod 33 is rotatably connected to the middle part 42 of the second support 4, and the end sleeve 331 at the other end is sleeved on the first longitudinal rod 32 of the first support, and the two are slidably matched.

[0019] Through the above connection relationship, when the first transverse transmission shaft driving gear 312 rotates, the first transverse transmission shaft 31 is driven to rotate by the bevel gear 311. Due to the action of the eccentric connecting rod 34, the upper part 41 of the second support makes a circular motion on the vertical plane; at the same time, the middle part 42 of the second support can only move up and down due to the existence of the second transverse rod 33; under the combined action of these two motion modes, the motion trajectory of the lower part 43 of the second support is a trajectory similar to an ellipse.

[0020] The lower part 43 of the second support has a concave arc surface, which is semi-cylindrical in this embodiment, and of course can also be bowl-shaped or similar shapes.

[0021] A suture needle rod limit seat 35 is also fixedly installed on the first support 3. The suture needle rod 5 passes through the longitudinal through hole of the suture needle rod limit seat 35 and moves up and down therein; a suture needle 51 is fixedly installed at the upper end of the suture needle rod 5. The suture needle 51 has a sharp needle tip, and a hook-shaped groove with an opening direction opposite to the needle tip is provided at the neck to facilitate hooking the suture when moving downward; a second limiting member 52 is fixed to the lower part of the suture needle rod 5, and one end of the second limiting member 52 is rotatably connected to the middle part 42 of the second support; the lower end of the suture needle rod 5 is connected to a universal wheel 53, which cooperates with the concave arc surface of the lower part 43 of the second support.

[0022] Through the above connection relationship, when the middle part 42 of the second support moves up and down, the suture needle rod 5 is also driven to move up and down through the second limiting member 52; at the same time, the cooperation relationship between the lower part 43 of the second support and the universal wheel 53 enables the suture needle rod 5 to rotate around its own axis, and as the swinging direction of the lower part 43 of the second support changes, the rotation of the suture needle rod 5 is reciprocating.

[0023] See Figure 4 , Figure 5This embodiment further includes a yarn nozzle rod 6 and a yarn nozzle 61. A yarn nozzle rod support 64 is fixed on the first support 3. The yarn nozzle rod support member 65 is cylindrical and is arranged inside the yarn nozzle rod support 64 and is rotationally engaged therewith; the yarn nozzle rod 6 passes through the radial through hole of the yarn nozzle rod support member and is slidably engaged therewith; the head of the yarn nozzle rod 6 is the yarn nozzle 61. A yarn nozzle rod driving gear 62 is provided on the main transmission shaft 2 and is engaged with a yarn nozzle rod driven gear 63. The yarn nozzle rod driven gear 63 is connected to a yarn nozzle rod driving wheel 66; the tail 67 of the yarn nozzle rod is eccentrically connected to the yarn nozzle rod driving wheel 66.

[0024] Through the above connection relationship, when the yarn nozzle rod driving gear 62 drives the yarn nozzle rod driving wheel 66 to rotate, the tail 67 of the yarn nozzle rod will perform a circular motion on the horizontal plane. At this time, the yarn nozzle 61 also performs a circular motion.

[0025] This embodiment further includes a presser foot rod 7 and a presser foot 71. The presser foot 71 has a smooth bottom surface. The presser foot rod is indirectly connected to the first support. The front end fixes the presser foot rod 71, and the rear end is pushed by a presser foot rod driving cylinder 72 and is provided with a reset mechanism. When the presser foot rod driving cylinder 72 pushes upward, the presser foot 71 is pushed downward to press on the sewing tooth disc 1.

[0026] This embodiment also has a scissor device 8. The scissor device is prior art and will not be elaborated here.

[0027] This embodiment works as follows:

[0028] Two sock coils to be sewn are hooked on the sewing teeth 10 of the sewing tooth disc 1. In the Figure 1 shown direction, the sewing tooth disc 1 rotates counterclockwise, with each advancement of one sewing tooth as a beat; the first support driving cylinder 38 and the first support reset member 39 cooperate to push the first support 3 to the working position. At this time, the presser foot 71 extends into the projection area of the sewing tooth disc 1, and the presser foot rod driving cylinder 72 pushes upward to make the presser foot 71 press downward on the sock to be sewn, preventing the sock coil from disengaging from the sewing tooth due to an upward force in the subsequent steps.

[0029] The main transmission shaft 2 rotates. Through the cooperation relationship between the first transverse transmission shaft driving gear 312 and the bevel gear 311, the first transverse transmission shaft 31 is driven to rotate, causing the eccentric connecting rod 34 to rotate around the first transverse transmission shaft 31. In combination with the connection relationship of the second transverse rod 33 and the first longitudinal rod 32, the second support 4 moves up and down, and at the same time, the lower part 43 of the second support generates a motion similar to an ellipse. The sewing needle rod 5 moves up and down along the sewing needle rod limit seat 35 under the drive of the second limiting member 52; at the same time, under the cooperation of the universal wheel 53 and the arc-shaped concave surface of the lower part 43 of the second support, it rotates reciprocally around its own axis.

[0030] When the first support 3 is in the first working position, the suture needle bar 5 performs the above-mentioned movement. At this time, the suture needle 51 passes through the longitudinal groove of the serrated needle 10, that is, the suture needle passes through the coil hooked on the serrated needle, hooks the suture thread, and then passes through the coil hooked on the serrated needle again; when the first support 3 is in the second working position, the suture needle bar 5 performs the above-mentioned movement again. At this time, the suture needle 51 is separated from the serrated needle 10, and the suture needle passes outside the coil hooked on the serrated needle, hooks the suture thread, and then returns from outside the coil hooked on the serrated needle.

[0031] The suture thread extends from the yarn guide 61, and the other end is itself hooked on the groove of the suture needle. Through the reciprocating movement inside and outside the coil, the two coils on the serrated needle are sutured together; as the serrated disk rotates, a pair of coils are sutured in each beat, thereby forming a stitch and completely suturing the sock.

[0032] After stitching one sock is completed, the scissors device cuts the excess suture thread. Therefore, when starting to stitch the next sock, one end of the suture thread is at the yarn guide, and the other end is at the scissors device; at this time, it is necessary to let the suture needle move up and down twice in the second working position to ensure that the suture thread is hooked and the first pair of coils are sutured.

[0033] The above process is continuous. Although the rotation of the serrated disk can be divided into several beats, the coils hooked on it are always in a moving state due to inertia; therefore, it is necessary to prevent the suture needle from hooking the coil during movement. For this reason, this patent designs to let the suture needle rotate around its own axis. In this way, when the suture needle moves downward, it is also rotating, and the rotation direction is the same as the forward direction of the serrated disk, thus avoiding the possibility of the groove of the suture needle hooking the coil.

[0034] While driving the first transverse transmission shaft 31, the main transmission shaft 2 also drives the yarn guide rod 6 through the driving gear 62 of the yarn guide rod, thereby enabling the yarn guide 61 to perform a circular motion on the horizontal plane. The motion projections of the suture needle in the first working position and the second working position both fall on the trajectory of this circular motion, so as to ensure that the motion trajectory of the suture needle intersects with the suture thread and can hook the suture thread for stitching operations.

Claims

1. A yarn guide mechanism for sewing tubular fabrics, comprising a yarn guide rod and a yarn guide. The yarn guide is fixed to the front end of the yarn guide rod for the sewing thread to pass through the yarn guide. It is characterized in that: It further includes a yarn nozzle rod support seat, in which there is a yarn nozzle rod support member. The yarn nozzle rod support member is cylindrical and is rotationally engaged with the yarn nozzle rod support seat. A through hole is radially formed in the yarn nozzle rod support member for the yarn nozzle rod to pass through and be slidably engaged with the yarn nozzle rod support member. The middle part of the yarn nozzle rod is disposed through the yarn nozzle rod support member. The tail of the yarn nozzle rod is eccentrically and movably connected to the yarn nozzle rod driving wheel.

Images