A sock sewing machine

Abstract

The present invention discloses a sock sewing machine, comprising a semi-circular sewing toothed disc, on which a plurality of sewing toothed needles are arranged, and the sewing toothed disc can rotate around its own axis; further comprising a sewing head, which forms a seam trace through the movement of the sewing needles, and cooperates with the moving sewing toothed disc to sew the coils hooked on the sewing teeth one by one by using the seam trace; further comprising a cutting device, which is installed on the sewing toothed disc; the sewing toothed disc rotates in the horizontal direction, and is semi-cylindrical in three-dimensional space, and the cutting device is arranged on the axial section of the sewing toothed disc, that is, in the vertical direction; the movement of the internal components of the cutting device is also completed on the vertical plane; in the rotation direction of the sewing toothed disc, the cutting device is installed after the last sewing toothed needle. The present invention can control the rotation and stop of the sewing toothed disc through software settings, so that the distance between the cutting point and the point where the seam trace is formed can be accurately controlled, thereby controlling the length of the thread head.

Description

Technical Field

[0001] The invention belongs to the technical field of knitting machinery, and in particular relates to a sock sewing machine. Background Art

[0002] After the socks are knitted, the axial end, that is, the part corresponding to the toes, needs to be closed with a sock sewing machine to form a complete sock. The current mainstream product is a smart sock machine that combines knitting and sewing, that is, a sock knitting machine and a sock sewing machine are combined into one. After the knitting part is knitted, it is transferred to the sock sewing part for sewing. Therefore, the sock sewing machine can also be regarded as part of the smart sock machine.

[0003] The principle of the sock sewing machine is to use the last row of loops of the knitted socks and hang it on a sewing toothed disk. The sewing toothed disk is annular and has a number of sewing needles arranged on it, each of which hooks a loop of the sock; then the sewing toothed disk is folded in half along its diameter to form a semi-annular shape that overlaps each other, and the sewing needles now correspond one to the other; then the loops on one half of the sewing needles are scraped onto the other half of the sewing needles, and at this time the socks are hooked on the semi-annular sewing toothed disk, and each sewing needle has two loops; then the semi-annular sewing toothed disk is rotated around its own axis to make all the sewing needles and the loops they hook pass through a sewing point, and a sewing head is arranged at this sewing point, and the sewing needle of the sewing head is used to drive the sewing thread to form a stitch, so that the two loops on the same sewing needle are sewn together, and at the same time, because all the sewing needles will pass through the sewing point in sequence, the stitch is also formed continuously, so the stitch will sew and connect all the loops together to complete the closure of the socks.

[0004] Regarding the sewing head, the current mainstream technical solution is recorded in Chinese patent CN200980120878.6. This sewing head includes a pair of sewing members and a supporting hook. The pair of sewing members each have a suture, each moves along a corresponding path and cooperates with each other to form a chain stitch, that is, a seam. In the initial stage, the seam is formed on the supporting hook to prevent the seam from being scattered and disintegrated. At the same time, a cutting member is required to cut the seam after the sewing of a sock is completed. In this prior art, the cutting member is installed close to the sewing member and the supporting hook, and is driven by a driving mechanism to extend it to complete the cutting. The cutting point is at a certain distance from the point where the seam is formed, and the distance is between 3-15mm.

[0005] The seam does not disappear after being cut. At the distance between the cutting point and the last sewing needle, this section of the seam will become the "tail" of the sock after it is sewn, and at the distance between the cutting point and the point where the seam is formed, this section of the seam will become the "head" of the next sock when it is sewn. Together, they become the thread ends on the inside of the sock. Theoretically, for aesthetic reasons, the thread ends on the inside of the sock should be as short as possible, but in reality, the seams are formed by the mutual pulling force between the sutures, and are not very strong. If the thread ends are too short, there is still a risk of them falling apart. Perhaps for this reason, the aforementioned prior art sets this distance at 3-15mm.

[0006] However, the question of how long the thread ends of the seams should be is not fixed, and it is mainly related to the material of the seams. The seams formed by rough and moderately elastic seams are not easy to be scattered, and the thread ends can be left shorter. In other words, the length of the seam thread ends, that is, the position of the cutting point, needs to be adjusted.

[0007] In the prior art, when the position of the cutting point needs to be adjusted, the cutting piece can only be removed first, moved to a suitable position, and then installed and fixed again, which is very inconvenient. Summary of the invention

[0008] The object of the present invention is to provide a sock sewing machine which can conveniently adjust the position of the cutting point.

[0009] The technical solution adopted by the present invention is as follows: a sock sewing machine includes a semi-annular sewing tooth disk, on which a plurality of sewing tooth needles are arranged, each sewing tooth needle is hooked with two sock coils, and the sewing tooth disk can rotate around its own axis; it also includes a sewing head, including a sewing needle with a suture, which forms a seam trace through the movement of the sewing needle, and cooperates with the moving sewing tooth disk to sew the coils hooked on the sewing teeth one by one using the seam trace; it also includes a cutting device for cutting the seam thread after a sock is sewn; it is characterized in that: the cutting device is installed on the sewing tooth disk; the sewing tooth disk rotates in the horizontal direction, and it appears as a semi-cylindrical shape in three-dimensional space, and the cutting device is arranged on the axial section of the sewing tooth disk, that is, in the vertical direction; the movement of the internal components of the cutting device is also completed on the vertical plane; in the rotation direction of the sewing tooth disk, the cutting device is installed after the last sewing tooth needle.

[0010] The cutting device includes a cutting base, which is fixedly mounted on the slit tooth disk, and the cutting base is provided with an oblique long groove; it also includes a first cutting blade, which is pivotally connected to the cutting base so as to be relatively rotatable, and the first cutting blade is provided with a longitudinal long hole, the top of the first cutting blade is a cutting blade, and the first cutting blade is also provided with a channel for accommodating the second cutting blade; the second cutting blade has an elongated main body, which can be accommodated in the channel of the first cutting blade and translate in the channel, and the second cutting blade is provided with a pin shaft, which passes through the longitudinal long hole of the first cutting blade and the oblique long groove of the cutting base; the second cutting blade has a head, and the lower edge of the head is a cutting blade; it also includes a forward driving member for pushing the second cutting blade to move upward along the channel of the first cutting blade and a reverse driving member for moving downward.

[0011] The forward driving member is a piston cylinder, which is installed on the first cutting blade.

[0012] The reverse driving member is a piston cylinder or a spring.

[0013] The cutting device also includes an elastic pressing sheet, which is installed on the first cutting sheet, covers the second cutting sheet and applies pressure to press the second cutting sheet toward the first cutting sheet.

[0014] One side of the head of the second cutting blade extends downward and is lower than the cutting edge to form a hook.

[0015] The utility model also comprises an air blowing nozzle, which is arranged toward the cutting device and is controlled by a valve to blow the seam to be cut toward the cutting device.

[0016] When the present invention is working, the sewing process is consistent with the prior art, that is, the sewing tooth disk rotates, so that the sewing tooth needles move forward stitch by stitch, and cooperate with the sewing head to form a seam to complete the sewing; after the coil on the last sewing tooth needle is also sewn, the sewing tooth disk continues to rotate forward, and the cutting device on the sewing tooth disk also moves forward accordingly. At this time, the sewing head is still continuing to form a seam, that is, the more the sewing tooth disk rotates forward, the longer the thread end of the seam is.

[0017] After rotating the set stroke, the slit tooth disc stops, and the forward drive of the cutting device pushes the second cutting blade to move upward, and its pin moves in the longitudinal long hole of the first cutting blade and the oblique long groove of the cutting base at the same time. Due to the inconsistent angles of the longitudinal long hole and the oblique long groove, the first cutting blade deflects relative to the cutting base. Observed from the outside, at this time, the second cutting blade extends upward on the one hand, and deflects together with the first cutting blade on the other hand, thereby hooking the seam hanging between the last slit tooth needle and the sewing head. Then the reverse drive of the cutting device pushes the second cutting blade to move downward, so that the cutting edges of the first cutting blade and the second cutting blade are tangent, cutting off the seam and completing the cutting action.

[0018] The rotation and stopping of the seam tooth disc can be controlled very accurately by an electric control device, so the present invention can accurately control the distance between the cutting point and the point where the seam is formed by setting the software, thereby controlling the length of the thread end. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0021] Figure 3 It is a schematic diagram of the cutting device in the folded state.

[0022] Figure 4 It is a schematic diagram of the cutting device in the open state.

[0023] Figure 5 is an exploded schematic diagram of the cutting device.

[0024] Figure 6 It is a schematic diagram of the main parts of the cutting device.

[0025] The markings in the attached drawings are as follows: 00-stitch; 1-sewing tooth plate; 11-sewing tooth needle; 21-support hook; 22-sewing fabric; 3-cutting device; 31-cutting base; 311-pin hole; 312-oblique long groove; 32-first cutting blade body; 321-first cutting blade attachment; 322-pin hole; 323-longitudinal long hole; 324-protrusion; 325-cutting blade; 33-second cutting blade; 331-pin hole; 332-cutting blade; 333-hook; 34-bidirectional cylinder; 341-reverse air nozzle; 342-forward air nozzle; 35-piston; 36-piston connecting block; 37-long pin; 38-elastic pressure plate; 39-short pin; 4-blowing nozzle. DETAILED DESCRIPTION

[0026] See also Figure 1 , Figure 2 The sock sewing machine in this embodiment includes a semi-circular sewing toothed disc 1, on which a plurality of sewing toothed needles 11 are arranged. It should be pointed out that the sewing toothed disc has a variety of structures and arrangements, and the ways of obtaining the sock coils are also various. This embodiment is just an example. However, no matter what kind of sewing toothed disc it is, it will appear semi-circular when sewing, and two coils will be hooked on each sewing toothed needle, and it will rotate around its own axis. In this embodiment, the sewing toothed disc 1 rotates counterclockwise, Figure 2 The state shown is to sew up the coil on the last stitching needle. It can be seen that the cutting device 3 is installed at the end of the rotation direction of the stitching tooth disk 1, that is, after the last stitching needle.

[0027] The embodiment also includes a sewing head, Figure 2 The support hook 21 of the sewing head and one of the sewing parts 22 can be seen, while the other sewing part is not visible due to the angle. The sewing head is also prior art, and the prior art documents mentioned in the background technology section can be referred to. It should also be pointed out that the sewing head also has many forms, and the figure shown is only one example. Figure 2 As can be seen in the figure, the suturing has been completed at this time, and the excess stitches 00 are suspended between the support hook 21 and the last stitch needle, waiting to be cut.

[0028] The embodiment also includes a blowing nozzle 4, which is connected to the air pipe and the valve is controlled by software, and can blow out air as needed; the blowing direction is toward the cutting device 3, and the seam mark 00 is blown toward the cutting device to ensure that the cutting device can cut the seam mark.

[0029] See also Figures 3 to 6 The cutting device 3 includes a cutting base 31 fixedly mounted on the slotted toothed disc. The cutting base 31 has a pin hole 311 and an oblique long slot 312. In this embodiment, the oblique long slot 312 has been hollowed out and can be called a long hole.

[0030] The first cutting blade body 32 and the first cutting blade attachment 321 fixed thereto are actually integrated in structure and together constitute the first cutting blade. Due to different material requirements and metal treatment processes, they are made into a split type. The first cutting blade has a pin hole 322 and a longitudinal long hole 323. There are two protrusions 324 on its head. A channel is formed between the two protrusions 324. The first cutting blade attachment 321 is fixed in this channel. Since the protrusions 324 are significantly higher than other parts of the first cutting blade body 32, even after the first cutting blade attachment 321 is fixedly installed, there is still a channel between the protrusions 324, which can be used to accommodate the second cutting blade. The top of the first cutting blade attachment 321 is a cutting blade 325.

[0031] The main body of the second cutting blade 33 is in the shape of a long strip, which is accommodated in the channel of the aforementioned first cutting blade and can move up and down therein; there is a pin hole 331 at the tail of the second cutting blade, and the head extends to one side, and its lower edge is a cutting edge 332. At the same time, the side continues to extend downward, lower than the cutting edge 332 to form a hook portion 333.

[0032] This embodiment uses a bidirectional cylinder 34 and a piston 35 as a driving member, which is used as both a forward driving member and a reverse driving member. Two air nozzles are provided on the bidirectional cylinder 34, namely a forward air nozzle 342 and a reverse air nozzle 341. The forward air nozzle 342 or the reverse air nozzle 341 supplies air through software control. When the forward air nozzle 342 supplies air, the piston 35 performs a forward movement, that is, an upward movement; when the reverse air nozzle 341 supplies air, the piston 35 performs a reverse movement, that is, a downward movement.

[0033] The short pin 39 passes through the pin hole 322 of the first cutting blade and the pin hole 311 of the cutting base to pivotally connect the two. The piston connecting block 36 fixedly connects the piston 35 and the second cutting blade 33, while the long pin 37 passes through the pin hole 331 of the second cutting blade, the longitudinal long hole 323 of the first cutting blade and the oblique long groove 312 of the cutting base, and the elastic pressing piece 38 is fixed on the first cutting blade and covers the second cutting blade, thereby pressing the second cutting blade toward the first cutting blade.

[0034] The initial state of the cutting device 3 is as follows Figure 3 As shown, the cutting base, the first cutting blade and the second cutting blade are arranged in parallel, and an angle difference is formed between the longitudinal long hole 323 and the oblique long slot 312. When the piston 35 moves upward, it pushes the second cutting blade 33 to move upward relative to the first cutting blade 32. At the same time, the long pin 37 moves in the longitudinal long hole 323 and the oblique long slot 312, causing the longitudinal long hole 323 and the oblique long slot 312 to overlap, that is, the first cutting blade 32 rotates an angle relative to the cutting base. Figure 4 As shown, at this time, the first cutting blade and the second cutting blade are deflected, and at the same time, the second cutting blade extends, and its hook portion 333 encloses the seam to be cut in the movement area of ​​the second cutting blade.

[0035] Then the piston 35 moves downward in the opposite direction, the cutting edge 325 of the first cutting blade and the cutting edge 332 of the second cutting blade are tangent to cut the seam, and the cutting action is completed, and the piston 35 returns to the original position. Figure 3 Status shown.

Claims

1. A sock sewing machine, comprising a semi-circular sewing toothed disc, on which a plurality of sewing toothed needles are arranged, each of which has two sock coils hooked thereon, and the sewing toothed disc can rotate around its own axis; further comprising a sewing head, comprising a sewing needle with a sewing thread, which forms a stitch through the movement of the sewing needle, and cooperates with the moving sewing toothed disc to sew the coils hooked on the sewing teeth one by one using the stitch; further comprising a cutting device, which is used to cut off the stitch after a sock is sewn; characterized in that: The cutting device is installed on the slit toothed disc; the slit toothed disc rotates in the horizontal direction and is semi-cylindrical in three-dimensional space. The cutting device is arranged on the axial section of the slit toothed disc, that is, in the vertical direction; the movement of the internal components of the cutting device is also completed on the vertical plane; in the rotation direction of the slit toothed disc, the cutting device is installed after the last slit tooth needle; The cutting device includes a first cutting blade and a second cutting blade. The top of the first cutting blade is a cutting edge and is also provided with a channel for accommodating the second cutting blade. The second cutting blade has a head and the lower edge of the head is a cutting edge. The cutting device also includes a forward driving member for pushing the second cutting blade to move upward along the channel of the first cutting blade and a reverse driving member for moving downward.

2. A sock sewing machine according to claim 1, characterized in that: The cutting device includes a cutting base, which is fixedly mounted on the slit tooth disk, and the cutting base is provided with an oblique long groove; it also includes a first cutting blade, which is pivotally connected to the cutting base so as to be relatively rotatable, and the first cutting blade is provided with a longitudinal long hole, the top of the first cutting blade is a cutting blade, and the first cutting blade is also provided with a channel for accommodating the second cutting blade; the second cutting blade has an elongated main body, which can be accommodated in the channel of the first cutting blade and translate in the channel, and the second cutting blade is provided with a pin shaft, which passes through the longitudinal long hole of the first cutting blade and the oblique long groove of the cutting base; the second cutting blade has a head, and the lower edge of the head is a cutting blade; it also includes a forward driving member for pushing the second cutting blade to move upward along the channel of the first cutting blade and a reverse driving member for moving downward.

3. A sock sewing machine according to claim 2, characterized in that: The forward driving member is mounted on the first cutting blade.

4. A sock sewing machine as claimed in claim 2, characterized in that: The cutting device also includes an elastic pressing sheet, which is installed on the first cutting sheet, covers the second cutting sheet and applies pressure to press the second cutting sheet toward the first cutting sheet.

5. A sock sewing machine as claimed in claim 2, characterized in that: One side of the head of the second cutting blade extends downward and is lower than the cutting edge to form a hook.

6. A sock sewing machine according to any one of claims 1 to 5, characterized in that: The utility model also comprises an air blowing nozzle, which is arranged toward the cutting device and is controlled by a valve to blow the seam to be cut toward the cutting device.

Images