Cutting device for sewing socks

Abstract

The present invention discloses a cutting device for sewing socks, comprising a cutting base, the cutting base having an oblique long groove; a first cutting blade, the first cutting blade being pivotally connected to the cutting base so as to be relatively rotatable, the first cutting blade having a longitudinal long hole, the top of the first cutting blade being a cutting blade, the first cutting blade also being provided with a channel for accommodating a second cutting blade; the second cutting blade having an elongated body, which can be accommodated in the channel of the first cutting blade and translated in the channel, the second cutting blade having a pin, the pin passing through the longitudinal long hole of the first cutting blade and the oblique long groove of the cutting base; the second cutting blade having a head, the lower edge of the head being a cutting blade; and 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. The present invention can more reliably hook the seam and cut it off.

Description

Technical Field

[0001] The invention belongs to the technical field of knitting machinery, in particular to a machine for sewing socks, and more specifically to a cutting device for sewing socks. Background Art

[0002] After the socks are knitted, they need to be closed at their axial end, that is, the part corresponding to the toes, using a sock sewing machine to form a complete sock. The current mainstream product is an intelligent sock machine that combines knitting and sewing, that is, a sock knitting machine and a sock sewing machine are combined into one. After the sock knitting part is knitted, it is transferred to the sock sewing part for sewing. The principle of sewing socks is to use the sewing head to form seams with sutures, sew and connect the last row of coils of the knitted socks in pairs, and then complete the closure of the socks. Then a cutting device is needed to cut or shear off the excess seams.

[0003] Regarding the sewing head and cutting device, the current mainstream technical solution is recorded in Chinese patent CN200980120878.6. This sewing head includes a pair of sewing parts and a supporting hook. The pair of sewing parts 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 part is required to cut the seam after the sewing of a sock is completed. In this prior art, the cutting part is scissor-shaped, having a first arm forming a complementary blade and a second arm forming a blade facing the complementary blade, the first arm and the second arm are close to the longitudinal ends of the first arm and the second arm, and one end of the end of the scissors positioned opposite to the tip of the scissors is pivoted relative to each other, and the first arm can rotate relative to the second arm around the corresponding pivot axis on the cutting plane, thereby opening or closing the tip of the scissors.

[0004] CN201910145383.4 also discloses a thread cutting device for sewing socks, comprising a scissors fixing seat, an upper scissor blade, a lower scissor blade, a driving mechanism and a reset mechanism. The upper scissor blade and the lower scissor blade are connected by a pivot to form a shear cut; the scissors fixing seat is provided with a through groove; the lower scissor blade is divided into three parts: a head part, a middle part and a tail part, the middle part is located in the through groove of the scissors fixing seat, the tail part conflicts with the driving mechanism and the reset mechanism so that the lower scissor blade can reciprocate relative to the scissors fixing seat, and the head part is connected to the upper scissor blade by a pivot; a first protrusion and a second protrusion are provided under the upper scissor blade, and the scissors fixing seat extends outward with a blocking end, the blocking end is located between the first protrusion and the second protrusion, and during the movement of the scissor blade, the blocking end conflicts with the first protrusion or the second protrusion respectively to control the upper scissor blade to rotate relative to the lower scissor blade.

[0005] The common point of the above-mentioned prior arts is that they simulate scissors in life. When working, the scissors are first extended in a translational manner, and then the two blades of the scissors are rotated relatively to close each other, thereby forming a shear. The disadvantage of this method is that if the opening angle of the scissors is too large when they are extended, a large force is required to control their closing; if the opening angle of the scissors is too small when they are extended, the seam to be cut may be missed. Summary of the invention

[0006] The object of the present invention is to provide a more convenient and reliable cutting device for sewing socks.

[0007] The technical solution adopted by the present invention is as follows: a cutting device for sewing socks, characterized in that it includes a cutting base with an oblique long groove on the cutting base; it also includes a first cutting piece, the first cutting piece is pivotally connected to the cutting base so as to be relatively rotatable, the first cutting piece has a longitudinal long hole, the top of the first cutting piece is a cutting blade, and the first cutting piece is also provided with a channel for accommodating the second cutting piece; the second cutting piece has an elongated main body, which can be accommodated in the channel of the first cutting piece and translate in the channel, the second cutting piece has a pin shaft, the pin shaft passes through the longitudinal long hole of the first cutting piece and the oblique long groove of the cutting base; the second cutting piece 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 piece to move upward along the channel of the first cutting piece and a reverse driving member for moving downward.

[0008] The forward driving member is a piston cylinder, which is installed on the first cutting blade.

[0009] The reverse driving member is a piston cylinder or a spring.

[0010] 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.

[0011] One side of the head of the second cutting blade extends downward and is lower than the cutting edge to form a hook.

[0012] When the present invention is working, the forward driving member 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. Since the angles of the longitudinal long hole and the oblique long groove are inconsistent, the first cutting blade is deflected relative to the cutting base. When viewed from the outside, 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 trace suspended between the last sewing needle and the sewing head. Then the reverse driving member 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 to each other, cutting off the seam trace and completing the cutting action.

[0013] Whether the present invention can reach the seam to be cut in actual work depends on the length and angle of the longitudinal long hole and the oblique long groove, and has nothing to do with the subsequent cutting action; and increasing the length and angle of the longitudinal long hole and the oblique long groove will not cause any change in the machine parameters, and the only limitation is whether the machine has enough space. Therefore, the present invention can more reliably hook the seam and cut it. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of an embodiment.

[0015] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0016] Figure 3 It is a schematic diagram of the cutting device in the folded state.

[0017] Figure 4 It is a schematic diagram of the cutting device in the open state.

[0018] Figure 5 is an exploded schematic diagram of the cutting device.

[0019] Figure 6 It is a schematic diagram of the main parts of the cutting device.

[0020] 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

[0021] 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 2The 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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 cutting device for sewing socks, characterized in that: It includes a cutting base with an oblique long groove on it; it also includes a first cutting blade, which is pivotally connected to the cutting base so as to be relatively rotatable, the first cutting blade has 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 body, which can be accommodated in the channel of the first cutting blade and translate in the channel, the second cutting blade has a pin shaft, and the pin shaft 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.

2. The cutting device for sewing socks according to claim 1, characterized in that: The forward driving member is mounted on the first cutting blade.

3. The cutting device for sewing socks according to claim 1, 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.

4. The cutting device for sewing socks according to claim 1, 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.

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