KR20170033447A - Circular knitting machine knitted fabric seaming method and circular knitting machine system - Google Patents

Abstract

A letter closing method and a circular knitting machine system of a circular knitting machine for making the linking portion dense like other loops. The transfer needle 34 is advanced in the axial direction of the knitting needle 21 and the transfer needle 34 and the knitting needle 21 are continued in the axial direction. The tip projection 34e of the transfer needle 34 is offset inward. The transfer sinker 49 is moved from the knitting needles 21 to the transfer needles 34 in the axial direction of the knitting needles. The leading end protrusion 34e of the transfer needle 34 is inserted into the inner loop 26a located inside the letter 27 rather than the final loop 26 hooked on the knitting needles 21, And is transferred from the needle 21 to the transfer needle 34. And the inner loop 26a transferred to the transfer needle 34 is linked. The loop size for linking becomes smaller as compared with the linking performed by transferring the final loop to the transfer needle. The linking portion can be made dense like other loops, thereby improving durability and appearance quality.

Description

Technical Field [0001] The present invention relates to a letter sealing method and a circular knitting machine of a circular knitting machine,

The present invention relates to a letter sealing method of a circular knitting machine and a circular knitting machine system.

Generally, the sock is woven in the order of the inlet rubber part, the leg part, the heel part, the foot part, and the toe part by the hosiery knitting machine, which is a sort of circular knitting machine. Thereafter, the toe opening is sealed by a sewing machine to become a sock. As a method of seaming, there are generally two methods, called linking or looping, and sewing, commonly known as rosa. The linking or looping of electrons is a way to reliably seal a pair of corresponding loops in order to close the loop of the opening of the sock (knee nose). The latter sewing is a method in which the openings are combined and sewed once or plural times regardless of the loop of the sock by a dedicated sewing machine.

There has been developed various types of letter transfer apparatuses that automatically set the letter (s) knitted by a sock knitting machine from a knitting portion of a sock knitting machine and set the same on a sewing machine unit instead of setting a sewing machine on a sewing machine by human hands Document 2 and Patent Document 3). By using such a letter transfer device, it is possible to automatically perform knitting, sealing and transferring, and it is possible to efficiently manufacture a circular knitted product such as a sock by alleviating the effort of the worker.

In the sock dispensing apparatus of Patent Document 1, the sewing sock is separated from the knitting needles while the toe side of the sock is held, and the sock held is turned over and sent to a post-process (sewing machine) have. Patent Document 2 discloses an apparatus for automatically picking up a sock product at the end of formation of a annular portion and transporting the sock product to a sewing station and creating a normal stitched seam (seam) on the inside of the sock product.

According to Patent Document 3, the sock opening is sealed by a linking method, and the sock knitted fabric squeezed by the circular knitting machine is automatically taken out from the circular knitting machine to automatically link between the loops of the toe.

Japanese Patent Application Laid-Open No. 2002-266208 Japanese Patent No. 4981675 Japanese Patent No. 4268136

In the sock dispensing apparatus of Patent Document 1, a sock knitted by a sock receiving tool for receiving a sock from a holding member is received, a holding member for synchronizing rotation with the knitting needle cylinder and an upper and lower holding member, a pin protruding from the holding member, and the like. However, since the number of fins is smaller than the number of knitting needles, and since the fins are provided at positions away from the knitting needles toward the inside of the knitting needle cylinder, the certainty of maintaining the same place at all times due to the characteristics of letters is lacking.

The automatic sewing apparatus of Patent Document 2 has a movable blade and a fixed blade for holding the last part of the sock product and is divided into sectors each having a plurality of teeth. The movable blade and the fixed blade have a plurality of positions inside the diameter where the knitting needles are present and inside the diameter where the knitting needles are present. For this reason, it is necessary to divide the moving blade and the fixed blade radially with respect to the knitting needles, and in order to satisfy the movement of each tooth between the knitting needles, it is necessary to increase the number of divisions It must not be. Accordingly, it is necessary to arrange the pneumatic actuators of the driving source by the number of the sectors, and a large number of parts are required.

Further, in Patent Document 1, the rosaceous course and the break room are continuously knitted on the toe opening end, and in Patent Document 2, it is necessary to knit a portion called the edge at the end of the knitting process of the sock article. The ablation chamber portion or edge is cut off from the sock product when sewing with a sewing machine that closes the opening of the sock. Therefore, there is a problem that not only wasting time but also unnecessary yarn consumption is caused by knitting the trimming portion or the edge.

In the method and apparatus for sewing the edge of the tubular knitted product of Patent Document 3, the letter is transferred from the knitting needles to the removing means, and after the letter is transferred to the hook up station, the letter is turned upside down, And is hooked up (linked) between the stitches. In this patent document 3, in order to move the knitting needles and the transfer needles in the axial direction of the knitting needles and transfer the final loops from the knitting needles to the transfer needles, the final loops pass the continuous portions of the tips of the knitting needles and the transfer needles The final loop has a larger loop size than the other inner loops. Therefore, when linking the final loops having a larger loop size, the continuity of the loop size is lost in the linking portion and the other portions, and the linking portion lacks the compactness. For this reason, the strength is lowered at this portion, which causes a problem in durability. In addition, since the uniformity of the loop size is impaired, the appearance quality deteriorates.

It is an object of the present invention to provide a letter sealing method and apparatus of a circular knitting machine capable of linking in which the linking portion is dense like the other loops and durability and appearance quality are improved. It is also an object of the present invention to provide a letter sealing method and a circular knitting machine system of a circular knitting machine in which one end of a letter of a circular knitting machine for knitting hosiery can be stitched tightly without knitting a knot without use.

In order to solve the above problem, in a method of sealing a circular knitting machine of the present invention, one end of a letter knitted with a circular knitting machine is transferred from a knitting needle of a knitting needle cylinder of a circular knitting machine to a transfer needle of the same number as a knitting needle, Closing. Then, the inner loop positioned on the inner side of the final loop of the letter hanging on the knitting needles is divided into half in the circumferential direction of the letter so as to form the first loop group and the second loop group. When the first loop group and the second loop group are closed, the opposed loops are joined together by the sewing machine of the sewing machine unit.

When transferring a letter from a knitting needle, it is preferable to use a transfer needle. In this case, the transfer needle and the knitting needle are relatively moved in the axial direction of the knitting needle, and the outer side of the distal end of the transfer needle approaches the inner side of the tip of the knitting needle. Subsequently, the transfer member is inserted into the gap between each knitting needle of the knitting needle cylinder from the radially outer side of the knitting needle cylinder inward, and the knitting needle is guided by the tip end of the transferring member. Then, the transfer member is moved from the knitting needles in the axial direction of the knitting needles with a transfer needle, and the tip of the transfer needle is inserted into the inner loop.

The circular knitting machine of the present invention is characterized in that one end of a letter knitted by a circular knitting machine is transferred from a knitting needle of a knitting needle cylinder of a circular knitting machine to a transfer needle of the same number as a knitting needle and then one end is closed by a sewing machine unit, , A loop coalescing mechanism, and a sewing machine unit. The transfer needle unit includes a retracted state in which the transfer needle for inserting the inner loop positioned inside of the last loop of the letter hanging on the knitting needle is held and is lifted up in the direction of the center line of the knitting needle cylinder and the transfer needle is retracted from the knitting needle, The knitting needles are brought into close proximity with the transfer needle. The transfer member transfers the letter from the knitting needles to the transfer needle when the transfer needle unit is in close proximity. The loop coalescing mechanism divides the inner loop into halves in the circumferential direction of the letter to form the first loop group and the second loop group, and combines the loops facing each other when closing the first loop group and the second loop group. The sewing machine unit sutures the loops joined by the loop coalescing mechanism. Further, it is preferable that the transfer member is inserted into the gap between each knitting needles of the knitting needle cylinder from the outside in the radial direction of the knitting needle cylinder, and guides the knitting needles by the leading end.

It is preferable that the transfer needle has the tip projection biased inward. This makes it possible to reliably insert the transfer needle into the inner loop on the inner side of the final loop of the letter.

The knitting needles and the transfer needles are equally spaced in the circumferential direction to constitute a knitting needles group and a transfer needles group. The transfer needles are divided into a first transfer needles group and a second transfer needles group at intervals of 180 degrees. A first transfer needles group in which the first loop group is transferred is divided into a fixed half-dial, a second transfer group in which the second loop group is transferred A group of needles is attached to the movable half-dial. The movable half-dial is reversibly attached to the fixed half-dial through the hinge, and the movable half-dial is in an open state in which the fixed half-dial and the movable half-dial are positioned on the same plane, And is selectively set in a closed state in which both the shifting needles are continuous as the tip comes close or in contact with each other.

In the closed state, it is preferable that the first transfer needle group and the second transfer needle group are arranged so that their tips are shifted in position in the radial direction of each half-dial. One end of one of the first transfer needle group and the second transfer needle group is provided with a receiving groove for receiving the other end thereof, and one end of the receiving groove is received in the other receiving groove in the closed state, And the second transfer needle group are continuous in the transfer needle axis direction. In this case, the first transfer needle group and the second transfer needle group can be reliably connected axially through the accommodating groove, and the loop can be reliably moved from one side to the other side.

It is preferable that the transferring member is a conveying sinker having a belt-like conveying sinker main body and a tip portion formed at an acute angle with the inclined portion. The tip portion is thinner than the thickness of the transport sinker main body, and the thickness of the transport sinker main body is the same as the gap between the knitting needles. In this case, the transfer sinker main body inserted between each knitting needles can guide the position of the knitting needles and the transfer needle at the time of transferring the letters to transfer the loops. Further, the thickness of the sinker main body is the same as the gap between the knitting needles, it includes substantially the same state in which there is a gap between them so that the transfer sinker main body can move into the gap of the knitting needles.

The transfer sinker is inserted by the sinker advancement mechanism from the outside to the inside in the radial direction of the knitting needle cylinder to the gap between each knitting needle of the knitting needle cylinder. The transfer sinker and the transfer sinker advance / retract mechanism insert the tip of the transfer needle into the inner loop by the sinker elevator mechanism to transfer the letter from the knitting needle to the transfer needle.

Before transferring the inner loop to the transfer needle, it is preferable to insert the transfer member into the space between the knitting needles in the upper portion of the letter, then lower the letter, and adjust the height of the final loop before pressing the final loop by the lower surface of the transfer sinker. In a letter of hosiery having a surplus portion such as a heel or a toe portion, even if a letter is drawn from a letter dropping pipe in order to adjust the loop of the letter stuck on the knitting needles, the letter can not be sufficiently stretched because there is slack in the excess portion. The loop may not be aligned. It is possible to solve the problem that the hook is hooked to the hook of the knitting needle due to the mismatch of the loop by matching the height of the final loop in advance by using the transfer sinker. In addition, the transfer sinker can be reliably inserted into the lower side of the letter.

It is preferable that a letter is sent to the sewing machine unit to sew the letter after the letter is transferred to the transfer needle and the fixed half-dial is rotated in the circumferential direction by interlocking with the elevation of the sewing machine needle of the sewing machine unit. Specifically, the present invention relates to a letter transfer device for transferring a letter to a sewing machine unit for sewing an inner loop of a letter after the inner loop is transferred to a transfer needle, and a letter transfer device for rotating the fixed half- It is preferable to have a rotating mechanism. In this case, it is not necessary to move the sewing machine unit along the letter, and the configuration becomes simple.

The transfer needle on the fixed half dial side has the sewing machine needle guide groove in the axial direction and guides the sewing machine needle by the sewing machine needle guide groove when the sewing machine needle is lifted or lowered. In this case, when the inner loop of each final loop is linked, the sewing machine needle is surely guided to the inner loop, and reliable sewing is performed.

It is preferable that the sewing machine unit is selectively set to a first sewing position where the sewing machine needle enters the sewing machine needle guide groove and a second sewing position located inside the letter than the first sewing position. Then, the linking by the sewing machine unit or the first sewing is performed at the first sewing position, and the second sewing is performed at the second sewing position. In this case, the second sewing can be selected as needed after the linking or the first sewing, and the method of closing the sock according to the type of the sock can be selected. Further, after the letter is held by the half-ring disposed inside the fixed half-dial and the letter pressing portion disposed facing the half-ring, the inner loop is separated from the transfer needle and the first and second It is preferable to perform sewing. In this case, the sewing can be reliably performed, and the sewing can be performed without restriction on the pitch of the loop, so that a strong sealing can be obtained.

(Effects of the Invention)

According to the present invention, the inner loop located on the inner side of the final loop of the letter hanging on the knitting needles is divided into a first loop group and a second loop group by dividing the inner loop in the circumferential direction of the letter, When the first loop group and the second loop group are closed through the final loop as in the conventional case, the linking portion is also different from the case of linking both the first loop group and the second loop group, And the durability and appearance quality are improved by maintaining the compactness. In other words, when the final loop is moved from the knitting needles and the letter is moved, the final loop needs to pass through the continuously enlarged portion of the knitting needles and the transfer needle, so that the loop size of the final loop is made larger than the inner loop, It is necessary to organize. Due to this, when the final loop is linked, the loop size of the linking portion is different from that of the other portion, so that the compactness of the linking portion is lacking, which can be solved. By linking the inner loop, the linking portion becomes the same loop size as the other portions, and the compactness is maintained, thereby improving durability and appearance quality. In addition, one end of the letter can be sewn as well as a suture by linking, and a second suture can be performed, so that a strong suture can be obtained.

1 is a perspective view showing a circular knitting machine system of the present invention.
2 is a plan view of the circular knitting machine system.
Fig. 3 is a vertical sectional view showing a state in which knitting by a circular knitting machine has been completed. Fig.
4 is a perspective view showing the arrangement of a transfer needle, a transfer sinker, a knitting needle, and the like.
5 is a perspective view showing the entire letter transferring device.
6 is a longitudinal sectional view showing a state in which the letter transfer device is positioned at the knitting position.
7 is a perspective view showing the letter transferring apparatus main body in an exploded state;
8 is a perspective view showing the transfer needle unit in a disassembled state.
9 is a perspective view showing the transfer needle unit in an open state.
10 is a perspective view showing the transfer needle unit in the closed state.
11 is a perspective view showing the transporting sinker retracting mechanism in a disassembled state.
12 is a perspective view showing an example of a transfer sinker.
13A is a perspective view showing a conveying sinker retracting mechanism in which the conveying sinker is in a retracted state.
Fig. 13B is a perspective view showing a conveying sinker retracting mechanism in which the conveying sinker is in an entering state. Fig.
14 is a perspective view showing the positional relationship between the knitting needles, the transfer needles, and the transfer sinkers.
15 is a plan view showing a state in which the upper mechanism of the circular knitting machine is opened and withdrawn upward;
16 is a longitudinal sectional view showing a state in which the letter dropping pipe is raised after the upper mechanism of the circular knitting machine is retracted upward.
17 is a perspective view of the entire system showing a state in which the letter transfer apparatus main body is positioned at the knitting position.
18 is a plan view of the entire system showing a state in which the letter transfer apparatus main body is positioned at the knitting position.
19 is a longitudinal sectional view showing a state in which the transfer sinker is in the entry position in order to align the final loop of the letter.
20 is a longitudinal sectional view of the state in which the final loop of the letter is aligned with the lowering of the conveying sinker.
Fig. 21 is a longitudinal sectional view showing a state in which the transfer needle is lowered and continued to the knitting needles in the axial direction. Fig.
FIG. 22 is a side view showing a state in which the fixed half-dial side transfer needle and the movable half-dial side transfer needle are in continuous contact with the knitting needles.
23 is a vertical sectional view showing a state in which the transfer sinker is in the entry position for transferring the letter to the transfer needle.
24 is a cross-sectional view showing a state in which the final loop of the letter is hooked on the knitting needles;
25 is a transverse cross-sectional view showing that the transfer needle is in the insertable position in the inner loop of the final loop of the letter with the transfer sinker in the entry position;
26 is a side view showing the relationship between the loop of the letter and the transfer sinker, the transfer needle, and the knitting needles.
Fig. 27 is a longitudinal sectional view showing a state in which the transfer sinker is lifted to transfer a letter to a transfer needle. Fig.
28 is a longitudinal sectional view showing a state in which the letter transfer apparatus main body and the letter dropping pipe are raised.
Fig. 29 is a longitudinal sectional view showing a state in which the movable arm is rotated and a letter is taken out from the letter-down pipe; Fig.
30 is a vertical sectional view showing a state in which the lower end of the letter is drawn into the turning pipe by the lowering of the turning pipe.
31 is a longitudinal sectional view showing a state in which the turning pipe is lifted to flip a letter.
32 is a longitudinal sectional view showing a state in which an upper part of a turning pipe reversing a letter is held by a clamping device;
33 is a vertical sectional view showing a state in which the letter transfer device body is lowered and the movable half-dial is inverted by the reversing device.
34 is a longitudinal sectional view showing a state in which the conveying sinker descends and enters between movable needles in the movable half-dial.
35 is a longitudinal sectional view showing a state in which the conveying sinker is raised so as to move the loop of the transfer needle of the movable half-dial to the transfer needle of the corresponding fixed half-dial.
36 is a longitudinal sectional view showing a state in which the conveying sinker is retracted upward and the movable half-dial returns to the original position.
Fig. 37 is a longitudinal sectional view showing a state in which a turning pipe holder and a lower letter pressing portion rise up and a letter held on the fixed half-dial is held between the half ring and the letter.
38 is a vertical sectional view showing a state in which the sewing machine unit is set at the first sewing position and the letter is sewn by linking with the transfer needle as a guide.
39 is a perspective view of a transfer needle showing a sewing machine needle guide groove formed along the axial direction on the outer end surface of the transfer needle.
40 is a longitudinal sectional view showing a state in which the half-ring is lowered so that the transfer needle unit is retracted upward and the letter is separated from the transfer needle.
41 is a longitudinal sectional view showing a state in which the cutter is operated to cut the sewing machine room after the completion of the first sewing.
42 is a longitudinal sectional view showing a state in which the turning rod rises and the letters are turned over to the front side and conveyed to the discharge unit.
43 is a longitudinal sectional view showing a state in which the turning pipe is lowered after discharging the reversed letter.
44 is a longitudinal sectional view showing a state in which the letter transfer apparatus main body is returned to the initial position.
45 is a flow chart showing each step of a letter sealing method and a sealing method for sealing one end of a letter;
Fig. 46A is a flowchart showing an example of the step of sealing the toe opening by linking. Fig.
FIG. 46B is a flowchart showing an example of a step of sewing a toe opening by sewing.
46C is a flowchart showing an example of a step of sewing a toe opening by sewing two times.
Fig. 46D is a flowchart showing an example of a step of sealing the opening of the toe by linking and sewing.
47 is a vertical sectional view showing a state in which the sewing machine unit is set at the first sewing position and the first sewing of the letter is performed without the guide of the transfer needle.
48 is a vertical sectional view showing a state in which the sewing machine unit is set in the second sewing position and sewing of the letter is performed for the second time.
49 is a longitudinal sectional view showing a state in which the cutter is operated to cut the sewing machine room after completion of the second sewing.

1 and 2, the circular knitting machine system 10 of the present invention includes a circular knitting machine 11, a letter opening sealing apparatus 12, and a letter transfer apparatus 13. 3, the circular knitting machine 11 includes a crossbar 14, a scissors band 15, a latch ring 16, an apodizer 17, a sinker bed 18, a knitting needle cylinder 19, A pipe 20, an unillustrated yarn feeder, and the like.

As shown in Fig. 4, a plurality of knitting needles 21 are arranged in parallel at a predetermined pitch in the circumferential direction at the upper end of the knitting needle cylinder 19. [ In the sinker bed 18, the sinker 25 is provided so as to be movable in the radial direction of the knitting needle cylinder 19 by the cam drive at the gap between the knitting needles 21. As shown in Fig. 3, the sock as the letter 27 is inserted into the opening rubber portion 27a and the leg portion 27a 27b, a heel portion 27c, a foot portion 27d, and a toe portion 27e in this order.

As shown in Fig. 1, a letter opening sealing apparatus 12 is provided on the side of the circular knitting machine 11. The letter opening sealing apparatus 12 has a sewing machine unit 100, a letter reversing unit 101, and a discharge unit 102. [ The opening edge portions of the letters 27 (see Fig. 3) can be sealed by interlocking these units 100 to 102, and then discharged to a product receiving box (not shown).

5, the letter transfer apparatus 13 has a letter transfer apparatus main body 30 and a moving mechanism 31 for moving the letter transfer apparatus main body 30. As shown in Fig. The moving mechanism 31 has a lifting / lowering shaft 32 and a moving arm 33. The elevating rotary shaft 32 is supported by the guide cylinder 36 so as to be movable in the vertical direction and rotatable about the vertical axis. A moving arm 33 is fixed to an upper portion of the elevation rotary shaft 32. A letter transfer device main body 30 is attached to the front end of the movable arm 33. A rocking air cylinder 37 is attached between the moving arm 33 and the guide cylinder 36. The rocking air cylinder 37 rotates the moving arm 33 about 90 in the horizontal plane about the lift-up rotary shaft 32, for example. 17, the upper portion of the knitting needle cylinder 19 of the circular knitting machine 11 (hereinafter referred to as a knitting stage) and the letter transferring machine main body 30 (Hereinafter, referred to as a sealing stage) of the turning pipe 110 of the letter opening suturing apparatus 12.

As shown in Fig. 5, the first and second arm cylinders 32a, 32b and 32c are sequentially connected to the lower end of the lifting and lowering shaft 32 from below. Respectively. By selectively driving one or more of these air cylinders 32a to 32c, the elevation rotary shaft 32 is vertically raised and raised, and the movable arm 33 is set to a necessary height in a series of processes.

As shown in Fig. 6, the letter transfer apparatus main body 30 has a transfer needle unit 40 and a transfer sinker unit 41. Fig. The transfer needle unit 40 has a fixed half-dial 43 holding the transfer needle 34, a movable half-dial 44, and a transfer needle holding cylinder 45 for holding them. The transfer needle unit 40 is moved up and down by the moving arm 33 (see Fig. 5) above the knitting needle cylinder 19 and the letter 27 held by the knitting needle 21 is transferred to the knitting needles 21 To the fixed half-dial 43 and the transfer needle 34 of the movable half-dial 44. [

The transfer needle holding cylinder 45 is rotatably attached to the transfer device base 51 through the bearing 50. [ As shown in Fig. 5, one end of the moving arm 33 is fixed to the conveying device base 51. As shown in Fig. 6, the transfer needle holding cylinder 45 is divided into upper and lower holding cylinder portions 45a and lower holding cylinder portions 45b, and a transfer needle rotating gear 52 is fixed therebetween. As shown in Fig. 7, the shifting needle rotating gear 52 is connected to the driving gear 53b of the motor 53. As shown in Fig. The rotation of the motor 53 allows the rotation of the transfer needle rotation gear 52 to rotate the half-dials 43 and 44 through the transfer needle holding cylinder 45. [ The rotating mechanism 106 is constituted by the motor 53, the transfer needle rotating gear 52, the transfer needle holding cylinder 45, and the like. 40, when the sewing machine unit 100 seals the inner loop 26a (see Fig. 24) of the letter 27, the rotating mechanism 106 is interlocked with the elevation of the sewing machine needle 107 The fixed half-dial 43 is rotated intermittently and the sewing machine needle 107 is securely inserted into each inner loop 26a so that the sewing machine room 108 is passed through each inner loop 26a to be linked every one stitch . 47 and 48, even when the letters 27 are separated from the transfer needles 34, the letters 27 are sandwiched by the half ring 60 and the lower letter pressing part 115 The fixed half-dial 43 is intermittently rotated in conjunction with the elevation of the sewing machine needle 107 to sew the letter 27 at a specified interval regardless of the intervals of the loops. In this embodiment, the looper needle cooperating with the sewing machine needle is not shown. Further, the number of sewing machine rooms is not limited to one, and two, three, and a plurality of yarns may be used.

8, the fixed half-dial 43 has a transfer needle retention groove 43b on the outer peripheral surface of the half-dial main body 43a, sets the transfer needle 34 in the transfer needle retention groove 43b And a holder 43c. The movable half-dial 44 is also configured similarly to the fixed half-dial 43 and has a half-dial main body 44a, a transfer needle holding groove 44b for holding the transfer needle 34, and a holder 44c. Thereby, the first group of transfer needles is attached to the fixed half-dial 43, and the second group of transfer needles is attached to the movable half-dial 44. The fixed half-dial 43 and the movable half-dial 44 are attached to the movable half-dial 44 such that the movable half-dial 44 can be rotated (reversed) by 180 degrees with respect to the fixed half- The holder 43c of the fixed half-dial 43 is fixed to the transfer needle holding cylinder 45. [

As shown in Fig. 9, in the normal state, the fixed half-dial 43 and the movable half-dial 44 are in a state in which the transfer needle 34 is continuous in the circumferential direction. In this state, as shown in Figs. 19 to 21 and Fig. 23 to Fig. 25, the letter 27 is transferred from the knitting needles 21 to the transfer needles 34. As shown in Fig. 10, when the movable half-dial 44 is inverted and added to the fixed half-dial 43, these half-dials 43 and 44 are closed. 33, the distal ends of the transfer needles 34 of the respective half-dials 43, 44 come into contact with each other to be connected to each other, so that the movable half-dials 44 are held by the transfer needles 34 of the movable half- An inner loop 26a of half the letter opening being made is individually joined to the other half of the inner loop 26a being held by the transfer needle 34 of the fixed half- The letter 27 with the inner loop 26a thus assembled is transferred to the transfer needle 34 of the fixed half-dial 43 (see Fig. 35), and then transferred to the sewing machine unit 100 The sealing is performed.

The arrangement radius of the transfer needles 34 of the movable half-dials 44 is set to be smaller than the arrangement radius of the transfer needles 34 (the movable needles 34) of the fixed half-dials 43 in order to securely connect the transfer needles 34 in the closed state. 34 in the radial direction. 10, when the movable half-dial 44 is closed, the transfer needle 34 of the fixed half-dial 43 is moved relative to the transfer needle 34 of the movable half-dial 44, Is offset in the radial direction of the half-dial 43. At the tip end of the transfer needle 34 of the movable half-dial 44 in the offset state, a tip-end receiving groove 34a is formed at a position where the tip of the transfer needle 34 of the fixed half-dial 43 is positioned . The distal end of the transfer needle 34 of the fixed half-dial 43 enters the distal end receiving groove 34a. By arranging the upper and lower transfer needles 34 at the time of reversal slightly offset from the radial direction in this manner, the connection of both transfer needles 34 can be surely performed as compared with the case where the transfer needles 34 are continuously opposed to each other .

As shown in Fig. 8, a transfer needle 45c is formed in the transfer needle holding cylinder 45 in the vertical direction, and a lock shaft 56 is disposed so as to be movable in the insertion hole 45c. The lower end of the lock shaft 56 enters the lock groove 44d of the movable half-dial 44 to regulate the reversal of the movable half-dial 44. [ A lock ring 57 is fixed to the upper end of the lock shaft 56.

7, a lock cover 55 of the movable half-dial 44 is attached to the transfer needle holding cylinder 45 so as to cover the transfer needle rotating gear 52. As shown in Fig. The lock cover 55 has a lock cylinder 55a and a stopper 55b. The lock ring 57 is moved up and down by the lock cylinder 55a and the lower end of the lock shaft 56 enters the lock groove 44d (see Fig. 8) when the lock ring 57 is lowered to regulate the inversion of the movable half- . When the lock ring 57 is lifted up by the lock cylinder 55a and comes into contact with the stopper 55b to stop the lower half of the lock shaft 56 from the lock groove 44d, The reverse regulation of

On the upper portion of the transfer needle holding cylinder 45, a half ring lifting cylinder 58 is mounted so as to be movable up and down. The half ring 60 is fixed to the half ring lifting cylinder 58 through an elevating shaft 59. The lifting shaft 59 is vertically divided and attached to the transfer needle holding cylinder 45 so as to be movable up and down. As shown in Fig. 6, the half-ring lifting and lowering cylinder 58 is constituted by an inner cylinder 58a and an outer cylinder 58b, which are configured to be rotatable around the cylinder center. 7, the cylinder attachment plate 61 is attached to the lock cover 55 via the stay 61a above the outer cylinder 58b. A half ring down first air cylinder 62a and a half ring down second air cylinder 62b are attached between the cylinder attachment plate 61 and the outer cylinder 58b. 36 to 38) in which the half ring 60 is retracted upward by selectively driving the half ring lowering first air cylinder 62a or the second air cylinder 62b, (See Figs. 40, 47, and 48) or the third position (see Figs. 41 and 49) for cutting the sewing machine room 108 after the sewing has been completed Descend. The sewing machine room 108 can be disconnected from the letter 27 after sewing.

As described above, the transfer needle rotation gear 52 and the motor 53, the half ring 60 that presses the letter opening at the time of sewing, and the lift mechanism 68 of the half ring 60 and the movable half- And the reversing lock mechanism 69 or the like constitute a loop coalescing mechanism. One half of the opening of the letter 27 in the sealing stage of the letter opening sealing apparatus 12 is superimposed on the other half of the opening of the sewing machine room 108 as described later, And the sewing machine room 108 is cut.

As shown in Fig. 7, the conveying sinker unit 41 has a conveying sinker retracting mechanism 70 and a conveying sinker elevating mechanism 71 for elevating the conveying sinker in the vertical direction. 11, the conveying sinker advancing / retracting mechanism 70 sequentially includes a bed 72, a base 73, a conveying sinker 49, a sinker band 75, a cam retaining ring 76, a cam 77, a cap 78, a rotary ring 79, a detent screw 74, and a feed sinker advance / retreat air cylinder 80. [ The bed 72 is attached to the ring-shaped base 73.

The feed sinker 49 is provided in the same number as the knitting needles 21 and is placed in the radial groove 72a of the bed 72 to be arranged radially in the radial direction of the bed 72 and to be movably held. As shown in Fig. 12, the conveying sinker 49 has a conveying sinker main body 49a in a band plate shape and a leading end portion 49b formed at an inner end of the conveying sinker main body 49a. The distal end portion 49b has an inclined portion 49d and is formed at an acute angle. The distal end portion 49b and the inclined portion 49d are formed to be thinner than the thickness of the conveyance sinker main body 49a. The thickness of the transport sinker main body 49a is the same as the gap between the knitting needles 21. The fact that the thickness of the conveying sinker main body 49a is the same as the gap between the knitting needles 21 means that the conveying sinker main body 49a is allowed to move within the gap between the knitting needles 21, It is not the same in the strict sense that the same state is included and the conveyance sinker main body 49a is unable to advance and retreat within the gap. A band groove 49g is formed on the outer end surface of the feed sinker 49. [ As shown in Fig. 11, a sinker band 75 made of rubber or coil spring is inserted into the band groove 49g. The sinker band (75) biases the feed sinker (49) toward the inside.

The cam 77 is constituted by a cam main body 77a which is divided in the circumferential direction and these cam main bodies 77a are connected in the form of a ring by a setscrew 74. [ The cam main body 77a is movably held by the cam retaining ring 76 and the cap 78 in the radial direction of the cap 78. [ The cap 78 is formed with a guide groove 78a for guiding the cam main body 77a in a substantially radial direction by two times the number of the cam main bodies 77a. A cam groove 79a is formed in the rotating ring 79 in the direction intersecting the radial direction.

The detent screw 74 is screwed to the cam main body 77a through the cam groove 79a and the guide groove 78a. The rotary ring 79 is rotatably held by the cap 78. [ The rotation ring 79 is formed with a projecting portion 79b protruding outward. The base 73 is provided with a bracket portion 73b for attaching the base end portion of the conveyance sinker advancing / retracting air cylinder 80 to the base 73. A transfer sinker advance / retreat air cylinder 80 is attached to the projecting portion 79b and the bracket portion 73b.

The projection 49c of the feed sinker 49 comes into contact with the outer peripheral surface of the cam 77 because the feed sinker 49 is biased inward by the sinker band 75. [ The rotary ring 79 rotates by a predetermined angle when the rod 80a of the forward / backward air cylinder 80 is projected and withdrawn.

13A, the detent screw 74 is located at the outer end of the cam groove 79a in a state in which the rod 80a of the feed sinker retractable air cylinder 80 is projected. As a result, the cam 77 (see Fig. 11) becomes large in diameter and the conveying sinker 49 is retracted.

13B, the detent screw 74 is located at the inner end of the cam groove 79a in a state in which the rod 80a of the feed and retract air cylinder 80 is pulled in. As a result, the cam 77 becomes small in diameter, and the conveying sinker 49 advances by the inward biasing by the sinker band 75, and enters the entering state.

14, the feed sinker 49 is inserted radially inwardly from the outside of the knitting needle cylinder 19 into the gap between the knitting needles 21 when the feed sinker 49 is in the infeed state. Since the upper end portions of both side faces are slanted obliquely to be gradually thinner toward the front end than the conveying sinker main body 49a, the leading end portion 49b can be surely conveyed to the gap between the knitting needles 21, Can be inserted. Further, after the insertion, since the feed sinker main body 49a is located in the gap between the knitting needles 21, the knitting needles 21 can be guided in the circumferential direction. The distal end portion 49b may be formed so as to be thinner or thinner than the feed sinker main body 49a.

7, the conveying sinker elevating mechanism 71 includes a conveying sinker elevating air cylinder 71a, a conveying sinker descending first air cylinder 71b, a conveying sinker descending second air cylinder 71c, An air cylinder 71d, and a cylinder attachment plate 71e. The transporting sinker lifting air cylinder 71a is attached between the transporting apparatus base 51 and the base 73 of the transporting sinker retracting mechanism 70 and adjusts the distance between these bases. The cylinder attachment plate 71e is provided with the action points of the feed sinker lifting first and second air cylinders 71b and 71c and the feed sinker lifting air cylinder 71d which are fixed to the feeder base 51. [ The air cylinders 71a to 71d are selectively driven so that the second position (see Fig. 27) and the third position (Fig. 19), and can be lowered to the fourth position (see FIG. 20). By switching these positions, the transport sinker 49 can be moved up and down within a predetermined range.

The letters 27 of the knitting needle cylinder 19 can be transferred to the transfer needle 34 by interlocking the respective parts using the transfer sinker advancing and retracting mechanism 70 and the transfer sinker elevating mechanism 71. [ After the letter 27 is transferred to the transfer needle 34, the movable half-dial 44 is reversed in the letter opening sealing apparatus 12 so that the inner loops 26a, And the sock is sewn together by the sewing machine unit 100 to complete the sock.

40, the sewing machine unit 100 includes a sewing machine body 103, a moving mechanism 104 for setting the sewing machine body 103 to the toe opening portion, A toothed / retreated positioning cylinder 104b for positioning the toothed / retreated positioning cylinder 104, a toothed portion holding mechanism 105 for holding the toothed portion in the vertical direction, and a rotating mechanism 106 for rotating the toothed portion.

31, the letter flipping unit 101 includes a turning pipe 110, a lower pipe elevating mechanism 111 in which the lower end of the turning pipe 110 is inserted and raised, a turning pipe clamping mechanism 112, (See Figs. 42 and 43), and a turning rod elevating mechanism (not shown).

Hereinafter, the configuration of each part will be described along with its movement in accordance with the operation sequence of the circular knitting machine system 10. [ 45, the circular knitting machine system 10 includes a transfer preparing step ST1, a letter transferring device moving step ST2, a letter-loop fitting step ST3, a letter transferring step ST4, a letter moving step ST5, , A letter flipping process ST6, a toe opening merging process ST7, a toe opening stitching process ST8, a letter flip, a discharging process ST9 and a device returning process ST10. I'm going.

In the transfer preparation step (ST1), the following processing is performed. Fig. 3 shows a longitudinal section in the knitting stage immediately after the end of the ring knitting. In each of the following longitudinal cross-sectional views, only a cross section (end face) is shown in order to avoid redundancy in the drawings, and the members shown inside thereof are omitted. The letter 27 immediately after the knitting with the thread cut by the scissors 15 is caught in each knitting needle 21 of the last loop 26 (see Fig. 24) and stored in the letter dropping pipe 20 . The upper device including the scissors band 15, the latch ring 16 and the apostrophe device 17 is attached to the crossbar 14. The cross bar 14 swings in the vertical direction by an air cylinder (not shown). 2 and 3, the knitting needle cylinder 19 of the knitting machine 11 faces a knitting position where the latch ring 16 faces the knitting needle cylinder 19, and knitting positions, as shown in Figs. 15 and 16, And the retracted position where the latch ring 16 and the like are retracted upward from the position.

In the state shown in Fig. 3, the letter dropping pipe 20 is connected to a suction blower through a valve (not shown), and the letter 27 is sucked downward in the letter dropping pipe 20. Although not shown in the figure, the letter dropping pipe 20 is configured to be raised and lowered by a plurality of air cylinders at three positions of the upper end, the lower end, and the lower end. When the crossbar 14 is rotated upward, the scissors 15, the latch ring 16, and the apostrophes 17 move to the retreat position (see FIG. 16).

The sinker cam 18a and the rubber sinker cam (not shown) on the sinker bed 18 are brought into an operating state and the sinker 25 is moved between the knitting needles 21 and the knitting needle cylinder 19 And the locking claw of the sinker 25 is moved away from the knitting needles 21. In this case, As a result, the locking of the letter 27 by the locking claw is released. Then, the knitting needles 21 rise to the non-knitting level and are projected to the maximum from the knitting needle cylinder 19 upward. Further, the letter dropping pipe 20 is raised and set at the upper end. Thereby, the final loop 26 of the letter 27 is located to the vicinity of the latch (also called veranda) 21a of the knitting needles 21 (see Fig. 26). Thereafter, the knitting needle cylinder 19 is rotated to stop the knitting needles 21 and the transfer needles 34 in the corresponding positional relationship, and then the knitting needle cylinder 19 is rotated in the unlocking direction . Thereafter, the conveying sinker lowering first and second cylinders 71b and 71c shown in FIG. 7 are in a stretched state, and a stopper for determining the lowering position of the conveying sinker 49 is prepared.

In the letter transferring device moving process (ST2), the following process is performed. First, in the state of Fig. 15, when the movable arm 33 is rotated by acting in the direction of shrinking the rod of the rocking air cylinder 37, as shown in Figs. 17 and 18, And moves to the knitting stage, which is the upper side of the cylinder 19, to be in the state shown in Fig.

In the letter-loop fitting step (ST3), the following processing is performed. The first upper arm cylinder 32a and the second upper arm cylinder 32b shown in Fig. 5 are contracted and the transfer needle 34 descends from the position of Fig. 6, Stop at a position 10 mm above the position. Further, the suction from the letter dropping pipe 20 is stopped. Then, as shown in Fig. 19, the conveying sinker lifting first air cylinder 71a (see Fig. 7) is brought into a non-operating state The feed sinker advancing / retracting mechanism 70 is lowered by its own weight. Then, the conveying sinker 49 is moved from the retracted state shown in Fig. 13A to the entry state shown in Fig. 13B by the conveying sinker retracting mechanism 70. [

Thereafter, as shown in Fig. 20, the letter dropping pipe 20 is lowered to the stop position. Further, the conveying sinker lowering first air cylinder 71b is contracted, and the conveying sinker advancing / retreating mechanism 70 is lowered to the height where the conveying sinker lowering second air cylinder 71c is elongated. By this descent, the letter 27 is lowered by the feeding sinker 49 in the entry state, and each final loop is adjusted to be in a predetermined position (same horizontal level) in the vertical direction. As a result, the feed sinker 49 can always be brought into contact with the letter at a predetermined position.

In the letter transferring step ST4, the following processing is performed. First, as shown in Fig. 21, the conveyance sinker 49 is in the retreat position. The conveyance sinker lowering second air cylinder 71c (see FIG. 7) is in a contracted state and the conveyance sinker 49 descends to a height at which the conveyance sinker retracting mechanism 70 contacts the sinker cap 18b . Further, the arm upper and lower third cylinder 32c (see Fig. 5) is in a contracted state. As a result, as shown in Fig. 22, the tip of the transfer needle 34 comes into contact with or approaches the back surface of the knitting needles 21.

Next, as shown in Fig. 13A, the rod sinks from the state in which the rod of the feed / retract air cylinder 80 protrudes as shown in Fig. 13B, and the feed sinker 49 moves from the retracted position to the entry position do. Thus, as shown in Fig. 26, the feed sinker 49 is inserted below the letter 27. Fig.

24 shows the letters 27 around the knitting needles 21 with the final loop 26 held on the knitting needles 21. [ 25 shows a letter 27 around the knitting needles 21 in a state where the feed sinker 49 is inserted in the gap between the knitting needles 21 radially from the outside toward the inside. Fig. 26 shows a side surface in a state where the feed sinker 49 is inserted between the knitting needles 21. In this state, since the transfer needle 34 is located above the inner loop 26a, the letter 27 can be lifted from below to move the inner loop 26a to the transfer needle 34. [

22, the transfer needle 34 descends and is moved in the vertical direction with respect to the knitting needles 21, so that the outer distal end face of the transfer needle 34 contacts the inner back surface of the knitting needles 21 State or close state. The contact state or proximity state is such that the arrangement radius of the transfer needles 34 of the movable half-dials 44 is slightly smaller than the arrangement radius of the transfer needles 34 of the fixed half-dials 43 . Therefore, when the knitting needles 21 approach the transfer needle 34 when both the half-dials 44 are in the open state, the space between the two is different and the transfer radius of the transfer needle 34 on the movable half- , A clearance is formed between the transfer needle 34 on the movable half-dial side and the knitting needles 21. However, as shown in Fig. 26, this is an allowable gap for the loop size. The knitting needles 21 and the transfer needles 34 are substantially integrated in the vertical direction so that the inner loop 26a of the letters 27 can be reliably transferred to the transfer needles 34. [

25, when the transfer needle 34 separated by a certain distance from the knitting needles 21 in the state where the final loop 26 is held by the knitting needles 21 faces the inner loops 26a The transfer needle 34 can be surely inserted into the inner loop 26a of the same course. Particularly, the transfer needle 34 has a pointed tip projection 34e in a triangular shape, and the tip projection 34e is offset inwardly and slightly away from the knitting needles 21, The transfer needle 34 is securely inserted into the inner loop 26a in the opening 26a.

The transfer sinker lifting air cylinder 71d is in a stretched state as shown in Fig. 27 and the letter 27 is lifted up to the upper portion of the transfer needle 34 by the transfer sinker 49. Fig. As a result, in the state in which the inner loop 26a of the letter 27 enters the transfer needle 34, the transfer sinker 49 prevents the letter 27 from falling off the transfer sinker 49, (26a) is reliably held in each transfer needle (34). 22, the distal end of the transfer needle 34 on the fixed half-dial side contacts the back surface of the knitting needles 21, but the knitting needles 21 are slightly swinging inward and the inner loop 26a can be smoothly transferred from the knitting needles 21 to the transfer needles 34 without locking them at their contact portions. This is because the knitting needles 21 are swingably housed in the knitting needle holding grooves of the knitting needle cylinder 19 slightly in the radial direction of the knitting needle cylinder 19, though the illustration is omitted. Further, since the distal end projection 34e of the transfer needle 34 is disposed offset inward, the transfer needle 34 is securely inserted and guided to the inner loop 26a.

In the letter moving process (ST5), the following process is performed. First, the arm upper and lower first to third air cylinders 32a to 32c (see Fig. 5) are in a stretched state, and the conveying apparatus base 51 returns to the moving height (upper end) as shown in Fig. Further, the letter dropping pipe 20 rises to the top. The knitting needle cylinder 19 is rotated until the knitting needles 21 reach the float level which is hidden by the sinker 25 until the knitting needles 21 21) is lowered. This prevents the letter 27 from contacting the knitting needle 21 even if the moving arm 33 is pivoted so as to pull the letter 27 out of the letter dropping pipe 20 in the next step.

Next, the moving arm 33 starts to rotate toward the letter opening sealing apparatus 12 as shown in Fig. 29 by operating the rocking air cylinder 37 (see Fig. 5) in the direction in which the rod extends. Then, it moves to the position shown in Fig. Then, the letter dropping pipe 20 becomes the lower end position. 3, the cross bar 14 is pivoted from the retreat position to the knitting position, and the knitting scissors 15, the latch ring 16 and the apostrophes 17 are set at the knitting positions, .

As shown in Fig. 30, the suction switching valve (not shown) is brought into the open state, and suction is performed from the turning pipe 110. [ Then, the upper and lower arm cylinders 32a to 32c (see Fig. 5) of the upper and lower arms are contracted, and the letter transfer apparatus main body 30 becomes the lower end position. Subsequently, a suction switching valve (not shown) is brought into a closed state, and suction from the turning pipe 110 is stopped.

In the letter flip process ST6, the following process is performed. First, as shown in Fig. 31, the turning pipe 110 is raised by the rising of the turning pipe holder 109, and the turning pipe 110 is passed through the letter 27. As shown in Fig. This causes the letter to flip over. 32, the lifting air cylinder 112a of the turning pipe clamp mechanism 112 is extended and lowered, and then the clamp air cylinder 112b acts to hold the turning pipe 110. As shown in Fig. Then, only the turning pipe holder 109 descends. Subsequently, after the conveyance sinker 49 reaches the retreat position, the conveyance sinker elevating air cylinder 71a is retracted, and the conveyance sinker 49 is withdrawn upward.

In the toe opening merging step (ST7), the following processing is performed. First, as shown in Fig. 33, the movable half-dial inversion driving section 85 moves from the retracted position to a position operable on the movable half-dial 44. [ Further, the lock cylinder 55a of the lock cover 55 is extended and the lock of the movable half-dial 44 is released. The half-dial inverting driver 85 has an inverting pin accommodating portion 85a into which the inverting pin 44e for inverting the movable half-dial 44 is inserted and inverts the movable half-dial 44 by rotating by 180 degrees. When the half-dial inversion driving section 85 is operated, the transfer needle 34 of the movable half-dial 44 contacts the transfer needle 34 of the fixed half-dial 43 in a straight line (see FIG. Then, the reversing lock mechanism 69 is operated, and the state in which the movable half-dial 44 is closed is maintained. Thereafter, the movable half-dial inverting driver 85 returns to the retracted position.

34, after the feed sinker lifting air cylinder 71a is operated in a stretched state to move the feed sinker 49 downward, the feed sinker advancing / retreating mechanism 70 enters the feed sinker 49 enters the lower end of the inner loop 26a caught by the transfer needle 34 of the movable half-dial 44. [ 35, the conveying sinker lifting air cylinder 71d is in a stretched state and the inner loop 26a of the transfer needle 34 on the movable half-dial 44 side is lifted upward, And moves to the transfer needle 34 of the fixed half-dial 43.

As shown in Fig. 36, after the conveyance sinker 49 reaches the retreat position, the conveyance sinker lift cylinder 71a is retracted, and the conveyance sinker 49 is retracted upward. Then, after the half-dial inversion driving section 85 rises again, the reverse rotation locking mechanism 69 is inactivated, and the reversed state of the movable half-dial 44 is released. Thereafter, the reverse rotation of the movable half-dial 44 is performed by the half-dial inversion driving unit 85, the lock cylinder 55a of the lock cover 55 is in a contracted state, and the movable half- And then locked again after being brought into an open state away from the fixed half-dial. Thereafter, the half-dial inverting driver 85 is lowered and moved to the retreat position.

The turning pipe holder 109 and the lower letter pressing part 115 are raised so as to sandwich the letter 27 with the half ring 60 as shown in Fig.

In the toe opening sealing step (ST8), the following processing is performed. As shown in Figs. 46A to 46D, the toe opening sewing step (ST8) can be selected from the first toe opening sewing step (ST8A) to the fourth toe opening sewing step (ST8D).

As shown in Fig. 46A, the first toe opening sealing step (ST8A) is a sealing method in a linking manner, and has a linking step, a letter separation step, and a sewing machine room cutting step. First, in the linking step, as shown in FIG. 38, the transfer needle rotation gear 52 is rotated by the motor 53 (see FIG. 7) to move the seal start portion to the position of the sewing machine needle 107. Thereafter, the sewing machine advance / retreat air cylinder 104a is extended and the sewing machine main body 103 is set to the first sewing position in a state in which the sewing machine advance / retreat positioning air cylinder 104b is extended. Subsequently, the sewing machine body 103 is driven and the motor 53 is driven in conjunction with the operation of the sewing machine needle 107, so that the inner loop 26a is stitched in a linked state by one stitch by the sewing machine needle 107. [ Further, the final loop 26 is surrounded by the linked sewing machine chamber 108. [

39, on the outer side surface of the fixed half-dial 43 of the transfer needle 34 in the radial direction, a sewing machine needle, for example, a V-shaped, semicircular or circular arc cross section is formed along the axial direction of the transfer needle 34 A guide groove 34b is formed. The lower end portion (distal end portion) of the transfer needle 34 has an inclined surface 34c inclined inward and a flat surface 34d parallel to the axial direction of the transfer needle 34. [ On the inclined surface 34c, a sewing machine needle guide groove 34b is opened. The sewing machine needle 107 enters the sewing machine needle guide groove 34b and descends so that the tip of the sewing machine needle 107 is securely held in the inner loop 26a held by the transferring needle 34. [ . Thus, it is possible to reliably seal the inner loop 26a.

As shown in Figs. 26 and 39, the distal end protrusion 34e of the transfer needle 34 is pointed in a triangular shape. As shown in Fig. 26, the distal end protrusion 34e is formed on an extension of the inner side surface of the transfer needle 34, so that the distal end projection 34e is inwardly offset. The tip end projection 34e is offset inward to form an inclined surface 34f at the tip end. The inclined surface 34f functions as a guide surface into which the tip protrusion 34e enters the inner loop 26a when the letter 27 is fed upward by the rise of the feed sinker 49. [ Therefore, the transfer needle 34 can securely enter the inner loop 26a and the letter 27 can be transferred or closed based on the inner loop 26a.

40, the half-ring lifting first air cylinder 62a is stretched, the first upper air cylinder 32a is lifted, and the transfer needle 34 is lifted, For example, 20 mm, and the sealed inner loop 26a is removed from the transfer needle 34. Then, At this time, the state in which the letter 27 is sandwiched by the lower letter pressing part 115 and the half ring 60 is maintained. Thereafter, the sewing machine body 108 in the sewing machine main body 103 forms an air hole of, for example, about 10 stitches.

41, the half-ring lifting second air cylinder 62b is in a stretched state and the letter 27 (see Fig. 41) held by the lower half-pressing portion 115 and the half- ) Moves downward. Thereafter, the cutter forward / backward air cylinder 120 is operated in a direction in which the cutter 121 advances into the upper portion of the airtight space by the sewing machine room 108. Then, the cutter upper and lower air cylinders 122 are stretched to set the cutter 121 at the cutting position of the cavity. Then, the cutter advance / retreat air cylinder 120 is in a contracted state, and the cutter 121 is retracted to cut the cutter. Thereafter, the cutter upper and lower air cylinder 122 is contracted to return the cutter 121 to its initial position. The above is the first toe opening sealing step (ST8A).

As shown in FIG. 46B, the second toe opening sealing step (ST8B) has a letter separation step, a sewing step, and a sewing machine room cutting step. The letter separation process and the sewing machine room cutting process are the same as the first toe opening sealing process (ST8A), and a description thereof will be omitted. In the letter separation step of the first toe opening sealing step (ST8A), after the linking step, the sewing machine main body (103) has a stitch of about 10 stitches at the end of the letter separation step. However, Therefore, this is omitted.

In the sewing process, the transfer needle rotation gear 52 is rotated by the motor 53 (see Fig. 7) to move the sewing start portion to the position of the sewing machine needle 107. Thereafter, the sewing machine advance / retreat air cylinder 104a is extended to set the sewing machine main body 103 to the first sewing position in a state where the sewing machine advance / retreat positioning air cylinder 104b is stretched. Next, as shown in Fig. 47, the sewing machine body 103 is driven to drive the motor 53 in conjunction with the operation of the sewing machine needle 107, thereby sewing the letter with the sewing machine needle 107. Fig. The driving pitch of the motor 53 can be arbitrarily set without depending on the pitch of the loop. Further, the final loop 26 is surrounded by the sewing machine room 108 that has been sewn. When the sewing of the letter is completed, the sewing machine main body 103 continuously makes the air tight by the sewing machine room 108, for example, about 10 stitches.

As shown in Fig. 46C, the third toe opening sealing step (ST8C) has a second sewing step and a sewing machine room cutting step following the letter separating step, the sewing step and the sewing machine room cutting step. The letter separation process, the first sewing process, and the sewing machine room cutting process are the same processes as the second toe opening sealing process (ST8B), and a description thereof will be omitted. In the second sewing step, as shown in Fig. 48, the half-ring lifting second air cylinder 62b is re-contracted, and the letter (s) sandwiched between the lower letter pressing portion 115 and the half ring 60 (27) is moved upward. Then, the transfer needle rotation gear 52 is rotated by the motor 53 (see Fig. 7) to move the seal start portion to the position of the sewing machine needle 107. [ Thereafter, when the sewing machine advance / retreat positioning air cylinder 104b is retracted, the sewing machine advance / retreat air cylinder 104a is further extended, and the sewing machine body 103 is set to the second sewing position. Then, the sewing machine body 103 is driven, and the motor 53 is driven in conjunction with the operation of the sewing machine needle 107 to sew the sewing machine needle 107 at a position different from the first sewing position of the letter. The driving pitch of the motor 53 can be arbitrarily set without depending on the pitch of the loop. In addition, the final loop 26 and the first sewing machine room 108 are surrounded by the sewing machine room 108 of the present sewing machine. When the sewing of the letter is completed, the sewing machine main body 103 continues to make the sewing machine room 108 a loosening by, for example, 10 stitches.

In the second sewing machine thread cutting step, as shown in Fig. 49, the half-ring lifting second air cylinder 62b is in a stretched state and is held by the lower case pressing portion 115 and the half ring 60 The position of the letter 27 moves downward. Thereafter, the cutter advancing / retracting air cylinder 120 is operated in a direction in which the cutter 121 advances into the upper portion of the cavity formed by the sewing machine room 108. Then, the cutter upper and lower air cylinders 122 are stretched to set the cutter 121 at the cutting position of the cavity. Then, the cutter advance / retreat air cylinder 120 is in a contracted state, and the cutter 121 is retracted to cut the cutter. Thereafter, the cutter upper and lower air cylinder 122 is retracted to return the cutter 121 to its initial position. This is the third toe opening sealing step (ST8C).

46D, the fourth toe opening sewing step ST8D has a second sewing step and a sewing machine room cutting step in the third toe opening sewing step (ST8C) after the first toe opening sewing step (ST8A) . Each step is the same as that of the first toe opening suturing step (ST8A) and the third toe opening suturing step (ST8C), and redundant description is omitted.

As described above, it is preferable to use a yarn of FTY (filament twisted yarn) as the final loop 26 in order to perform linking or sewing to the inner loop 26a (see Fig. 25) . FTY is generally used as a back yarn of a sock and is made of stretchable, for example, polyurethane and polyester, and is thin and excellent in stretchability. As a result, even if the final loop 26 is surrounded by the sewing machine room 108 which is linked or sewn, there is little possibility that the final loop 26 expands, thereby deteriorating the appearance quality of the sock. When the distal end of the transfer needle 34 is inserted into the inner loop 26a of the letter 27, the last loop 26 is brought into close contact with the knitting needle 21 by using a thread such as FTY having elasticity And the tip of the transfer needle 34 can be reliably inserted into the inner loop 26a inside the final loop 26. [ The inner loop in which the transfer needle 34 is inserted is described as the loop 26a before the last loop 26 but the transfer needle 34 is inserted into the loop two times before or before the loop 26a. You can. Further, the transfer needles 34 may be inserted in a state in which one loop before, or two loops before are mixed. Also, the final loop 26 may be the same thread as the inner loop 26a.

(ST8A to ST8D) are selected and the toe openings are stitched together. Therefore, in addition to the sealing of only the linking, the stitches are stuck to one circular knitting machine system 10 . When the toe opening sewing steps ST8A to ST8D are completed, the sewing machine advance / retreat air cylinder 104a and the sewing machine advance / retreat positioning air cylinder 104b are contracted to set the sewing machine body 103 to the retreat position.

In the letter face side flipping and discharging process (ST9), the following process is performed. First, as shown in Fig. 42, the suction port side suction switching valve (not shown) is opened, and suction is performed from the turning pipe 110 via the discharge unit 102. [ Subsequently, the lower letter pressing part 115 descends to the retreat position, and the turning pipe holder 109 also moves to the lowermost position once. The turning rod 113 then rises with the turning pipe holder 109 and lifts the letter 27 in the turning pipe 110 so that the letter 27 is again sent to the front side of the letter 27, And is discharged through a discharge tube 102a of the discharge unit 102 shown in Fig. 1 to a product receiving box (not shown). Thereafter, the discharge port side suction switching valve is closed, and the suction of the discharge tube 102a is released. Further, the half-ring lowering first air cylinder 62a and the second air cylinder 62b are contracted, and the half-ring 60 is retracted upward. Then, the turning pipe holder 109 further ascends to the upper position.

In the device returning step ST10, the following processing is performed. First, as shown in Fig. 43, the clamp air cylinder 112b is contracted, and the retaining of the turning pipe 110 transitions from the clamp mechanism 112 to the turning pipe holder 109. [ Thereafter, the turning pipe holder 109 is lowered together with the turning rod 113 and the turning pipe 110, and is set at the lower end.

Then, the lifting air cylinder 112a of the clamp mechanism 112 shown in Fig. 43 is in a contracted state, and the clamp pipe 112c is retracted upward. Further, the arm upper and lower second cylinder 32b and the arm upper and lower third cylinder 32c are operated in the direction in which they extend, and the moving arm 33 is set at the upper position. At this upper position, the movable arm 33 is movable in the horizontal plane.

After the letters 27 are knitted by the circular knitting machine 11 and then sent to the letter opening sewing apparatus 12 by the letter transfer device 13 to close the toe opening by repeating the above operation, (102). ≪ / RTI > The next letter 27 is woven in the circular knitting machine 11 when the toe opening is closed by the letter opening suturing apparatus 12, so that the letter 27 such as hosiery can be produced efficiently.

FIG. 45 is a flow chart summarizing each of the above processes (ST1 to ST10). In the present embodiment, the letter 27 is transferred from the knitting needle cylinder 19 of the circular knitting machine 11 to the letter transfer device 13 in order to close one end of the letter 27 woven by the circular knitting machine 11 A letter transferring step ST2, a letter transferring step ST2, a letter transferring step ST2, a letter transferring step ST2, a letter transferring step ST2, a letter transferring step ST2, A toe opening sewing step ST8, a letter face side flipping, a discharging step ST9, and a device returning step ST10.

3 and 16, the upper apparatus of the circular knitting machine 11 is moved from the knitting position to the retracted position with respect to the letter 27 knitted by the circular knitting machine 11, and the circular knitting machine 11 26) of the letter 27 held by the knitting needles 21 of the knitting needles 21 is moved under the latch 21a of the knitting needles 21 and the knitting needles 21 of the knitting needles 21 (19) in the correct position.

The letter transfer device 13 for transferring the inner loop 26a of the letter 27 is moved just above the circular knitting machine 11 as shown in Fig. 20, the feed sinker 49 of the letter transfer device 13 is brought into contact with the letter 27 and lowered, and the height of the final loop 26 of the letter 27 is set at Set it in a certain position in the vertical direction. In the letter transferring step ST4, the transfer sinker 49 is moved to a height exceeding the hook of the knitting needles 21, as shown in Figs. 21, 23 and 27, so that the inner loop 26a of the letter 27, To the transfer needle (34).

In the letter moving step ST5, the letter 27 is moved from the knitting stage to the sealing stage by the letter transfer device 13 as shown in Figs.

In the letter flip process ST6, as shown in Figs. 31 and 32, the turning pipe 110 is inserted into the letter 27 to turn the letter 27 upside down.

34, after the transfer needle 34 of the movable half-dial 44 is combined with the transfer needle 34 of the fixed half-dial 43, as shown in Fig. 34, The inner loop 26a of the transfer needle 34 of the movable half-dial 44 is transferred to the transfer needle 34 of the fixed half-dial 43 by the transfer sinker 49 of the transfer sinker unit 41. [

In the toe opening sewing step (ST8), it is possible to select ST8A, ST8B, ST8C and ST8D in accordance with the use of a product such as a sock to be knitted as shown in Figs. 46A to 46D. The first toe opening sewing step ST8A is a one-step linking method. As shown in Fig. 38, the inner loops 26a overlapping the transfer needles 34 of the fixed half- The sewing machine room 108 is closed. At this time, each inner loop 26a of the letter 27 is sent one stitch by the rotation mechanism 106 of the fixed half-dial 43 in conjunction with the elevation of the needle of the sewing machine, And stitched by the sewing machine room 108 for each stitch. 39, since the sewing machine needle is guided by the sewing machine needle guide groove 34b of the transfer needle 34 when the sewing machine needle is lifted or lowered in the first toe opening sewing step ST8A, The sewing machine needle can be passed through the inner loop 38a.

The second toe opening sewing step ST8B is a one-time sewing method. As shown in Fig. 40, before the sewing, the letter 27 is held by the lower letter pressing part 115 and the half ring 60 The inner loop 26a can be pulled out of the transfer needle 34 and sewed without restriction of the pitch of the loop by the sewing machine.

The third toe opening suturing step ST8C is a method of further sewing after the second toe opening suturing step ST8B. The sewing machine unit 100 is moved as shown in Fig. 48 and then subjected to sewing to increase the strength of the suture part .

The fourth toe opening sewing step (ST8D) is a method of further sewing after the first toe opening sewing step (ST8A). Like the third toe opening sewing step (ST8C), the sewing machine unit It is possible to increase the strength of the suture portion by moving the suture together with sewing.

As shown in FIG. 42, the turning rod 113 is inserted into the letter, so that the letters 27 are reversed to the table in the turning pipe 110 in the flip and discharge process ST9. Thereafter, the reversed letter 27 is sucked into the table in the turning pipe 110 and is installed outside the circular knitting machine 11 through the discharge tube 102a of the discharge unit 102 as shown in Fig. 1 And is discharged to a product receiving box (not shown).

In the device returning step ST10, as shown in Figs. 43 and 44, each operation unit is placed in the initial position state, and waits for the next letter to be squeezed.

In the first embodiment, the transfer needle is inserted into the inner loop positioned on the inner side of the final loop so that the letter is transferred from the knitting needle to the transfer needle. However, the transfer needle for the final loop, in which the tip projection of the transfer needle is offset outward , The letter can be transferred from the knitting needles to the transfer needle by inserting a transfer needle in the final loop. In this case, the final loops may be linked together instead of the inner loop.

In the above embodiment, when transferring letters from a knitting needle to a transfer needle, the inner loop is transferred to the transfer needle rather than the final loop. However, for example, when transferring from the knitting needle to the transfer needle, A letter is transferred to the final loop using a transfer needle with the end protrusion offset outwardly as shown in Figure 3B and the intermediate needle is inserted into the inner loop for transferring the letter from the transferred needle to its inner loop , And finally the letter may be maintained by the inner loop. In this case as well, the inner loop is divided into half in the circumferential direction of the letter to form the first loop group and the second loop group. When the first loop group and the second loop group are closed, the opposed loops are joined together by the sewing machine of the sewing machine unit. The intermediate needle may be a point needle for retaining the letter for linking, or a letter retaining needle for retaining the letter prior to transfer to the point needle.

For example, as described in Japanese Patent No. 4268136,

1. A first letter transfer process for transferring the final loop held by the knitting needles to a transfer needle (stitch removal means)

2. a final loop consolidating step of combining the half-dials (crowns) holding the transfer needles to move the opposing final loops to one half-dial,

3. A second letter transfer process for inserting the point needle (hook-up bar-shaped protrusion) of the sewing machine unit (hook-up station) into the final loop with the transfer needle kept in the final loop and transferring the letter to the point needle side,

4. In the case where the final loop of the letter has a linking process of hooking up by the sewing machine unit,

In the second letter transfer process, the point needle of the sewing machine unit is inserted into the inner loop while the transfer needle maintains the final loop, and the letter is transferred to the point needle side. Thus, in the same manner as in the first embodiment, the linking portion is dense like the other loops, and durability and appearance quality can be improved.

Further, as described in Japanese Patent No. 5389830,

1. A first letter transfer process for transferring a final loop held by a knitting needles to a transfer needle (pick-up member)

2. A second letter feeding step of inserting the point needles (spikes) of the sewing machine unit (roofing station) into the final loop with the last loop maintained by the transfer needle and transferring the letter to the point needles side,

3. a final loop consolidating step of combining the half-dials holding the point needles (semi-annular elements) to move the opposing final loops to one half-dial,

4. In the case of having a linking process for linking (looping) the final loop by the sewing machine unit,

In the second letter transfer step, the point needles of the sewing machine unit are inserted into the inner loop while the transfer needle is kept in the final loop, and the letter is transferred to the point needle side. Further, in the final loop compounding step, the half-dials holding the point needles are combined to move the opposing inner loop to one half-dial. Thus, in the same manner as in the first embodiment, the linking portion is dense like the other loops, and durability and appearance quality can be improved.

In the above embodiment, the sewing machine room is passed through once every stitch when the inner loop is linked. However, the number of times the sewing machine room is passed may be not only once but also twice or more. Further, it is possible to reinforce the closed portion due to the linking by making the area through which the sewing machine room passes a plurality of times a number loop of the closing start of the inner loop and a number loop of the closing end of the inner loop. Further, the portion through which the sewing machine room is allowed to pass a plurality of times may be an appropriate area without being limited to the start of closing or the end of closing. Further, the sewing machine room to be passed through the inner loop may be changed at a plurality of pitches, for example. For example, the loop for passing the sewing machine room through one time and the loop for passing the sewing machine room two times may be alternately provided, or a loop for allowing the sewing machine position to pass a plurality of times for every several pitches may be used.

10: circular knitting machine system 11: circular knitting machine
12: Letter opening suture device 13: Letter transfer device
19: Knitting Needle Cylinder 21: Knitting Needle
26: final loop 26a: inner loop
27: letter 33: moving arm
34: Transfer needle 34b: Sewing machine needle guide groove
40: Transfer needle unit 41: Feed sinker unit
43: Fixed half-dial 44: Operational half-dial
45: Transfer needle retainer 46: Hinge
49: Feed sinker 70: Feed sinker advanced and retracted mechanism
71: feed sinker elevator 85: movable half-dial inverting driver
100: sewing machine unit 101: letter inverting unit
102: discharge unit 103: sewing machine body
106: rotation mechanism 107: sewing machine needle
115: Lower letter pressing part

Claims (24)

A letter closing method of a circular knitting machine in which one end of a letter knitted by a circular knitting machine is transferred from a knitting needle of a knitting needle cylinder of the circular knitting machine to a transfer needle of the same number as the knitting needle and then the one end is closed by a sewing machine unit,
The first loop group and the second loop group are divided into halves in the circumferential direction of the letter, the inner loops positioned on the inner side of the last loop of the letters hanging on the knitting needles, And the loops opposed to each other when closing the group are sewn together by the sewing machine of the sewing machine unit. The method according to claim 1,
When transferring a letter from the knitting needles, the transfer needle and the knitting needles are relatively moved in the axial direction of the knitting needles so that the outer side surfaces of the distal ends of the transfer needles Approach,
And a transfer member is inserted into the gap between the knitting needles of the knitting needle cylinder from the radially outer side of the knitting needle cylinder inwardly to guide the knitting needle by the tip of the transferring member,
A letter of a circular knitting machine for transferring the letter from the knitting needle to the transfer needle by moving the transfer member from the knitting needle in the axial direction of the knitting needle by the transfer needle to insert the tip of the transfer needle into the inner loop, Suture method. 3. The method according to claim 1 or 2,
Wherein said transfer needle has a tip projection biased inward. 4. The method according to any one of claims 1 to 3,
The knitting needles and the transfer needles are arranged at regular intervals in the circumferential direction to constitute a knitting needles group and a transfer needles group,
Wherein the first group of transfer needles is divided into a first group of transfer needles and a second group of transfer needles at intervals of 180 degrees and the first group of transfer needles to which the first group of loops is transferred is transferred to a fixed half- The second transfer needle group is attached to the movable half-dial,
Wherein the movable half-dial is reversibly attached to the fixed half-dial through a hinge portion,
Wherein the movable half-dials and the fixed half-dials are on the same plane, and a closed state in which the tip ends of the second transfer needles are in proximity to or in contact with the distal ends of the first transfer needles, Wherein the first and second sealing members are selectively set. 5. The method of claim 4,
The first transfer needle group and the second transfer needle group in the closed state are arranged such that the tip ends of the first transfer needle group and the second transfer needle group are displaced from each other in the radial direction of the respective half- The first transfer needle group and the second transfer needle group are moved in a state in which the one end of the one transfer needle is accommodated in the other of the receiving grooves, A method of sealing a circular knitting machine in a needle axis direction. 6. The method according to any one of claims 2 to 5,
Wherein said transferring member is a conveying sinker having said leading end portion formed at an acute angle with a conveying sinker main body and an inclined portion on a strip-
Wherein the tip of the feed sinker body is thinner than the thickness of the feed sinker body and the thickness of the feed sinker body is the same as the gap between the knitting needles. The method according to claim 6,
The feed sinker is inserted into the gap between the knitting needles of the knitting needle cylinder from the outside to the inside in the radial direction of the knitting needle cylinder by the sinker advancing /
Wherein the conveying sinker and the conveying sinker advancing / retracting mechanism transfer the letter from the knitting needle to the transfer needle by inserting the tip of the transfer needle into the inner loop by a sinker elevator mechanism. 8. The method according to any one of claims 2 to 7,
Before transferring the inner loop to the transfer needle, lowering the transfer member after inserting the transfer member into the space between the knitting needles at the upper portion of the letter, The letter sewing method of a circular knitting machine in which the height of the knitting machine is adjusted. 9. A method according to any one of claims 6 to 8, cited in claims 4, 5, 4 or 5,
Wherein the inner loop is moved to the sewing machine unit in order to sew the inner loop after the inner loop is transferred to the transfer needle, and the circular knitting machine is rotated in the circumferential direction by interlocking with the elevation of the sewing machine needle of the sewing machine unit, Of the letter sealing method. 10. The method of claim 9,
Wherein the transfer needle on the fixed half dial side has the sewing machine needle guide groove in the axial direction and guides the sewing machine needle by the sewing machine needle guide groove when the sewing machine needle is lifted or lowered. 11. The method of claim 10,
The sewing machine unit is selectively set to a first sewing position in which the sewing machine needle enters the sewing machine needle guide groove and a second sewing position in which the sewing machine needle is located inside the letter than the first sewing position, A method for sewing a letter in a sewing machine comprising: sewing in a first sewing position; sewing in a first sewing position; and sewing in a second sewing position. 12. The method of claim 11,
A half ring disposed inside the fixed half-dial and a letter pressing portion arranged to face the half-ring, the inner loop is separated from the transfer needle, A method of sewing a second sewing. A circular knitting machine in which one end of a letter knitted by a circular knitting machine is transferred from a knitting needle of a knitting needle cylinder of the circular knitting machine to a transfer needle of the same number as the knitting needles and then the one end is closed by a sewing machine unit,
A transfer needle which is inserted in an inner loop located inside of a final loop of the letter hanging on the knitting needle and which is lifted in a direction of a center line of the knitting needle cylinder and retracted from the knitting needle, A transfer needle unit in which the transfer needle is brought into close proximity to the knitting needles,
A transferring member for transferring the letter from the knitting needle to the transfer needle when the transfer needle unit is in the close state,
Wherein the inner loop is divided into a first loop group and a second loop group by dividing the inner loop into halves in the circumferential direction of the letter, and the loops merging mechanism that confronts each other when closing the first loop group and the second loop group, ,
And a sewing machine unit for sewing the loops that are joined by the loop coalescing mechanism. 14. The method of claim 13,
The transfer member is inserted into the gap between each knitting needles of the knitting needle cylinder in the radial direction of the knitting needle cylinder from the outside to the inside when the transfer needle unit is in the close state and guides the knitting needle system. The method according to claim 13 or 14,
Wherein the transfer needle has a leading projection that is biased in a direction away from the knitting needles while being held in the transfer needle unit. 16. The method according to any one of claims 13 to 15,
The knitting needles and the transfer needles are arranged at regular intervals in the circumferential direction to constitute a knitting needles group and a transfer needles group,
Wherein the transfer needle unit has a fixed half-dial holding a first transfer needle group to which the first loop group is transferred and a movable half-dial holding a second transfer needle group to which the second loop group is transferred,
Wherein the movable half-dial is reversibly attached to the fixed half-dial through a hinge, and the movable half-dial is in an open state in which the fixed half-dial and the movable half-dial are on the same plane, Wherein the second transfer needle group is selectively set in a closed state in which the tip of the second transfer needle group is in proximity or contact so that both transfer needles are continuous. 17. The method of claim 16,
The first transfer needle group and the second transfer needle group in the closed state are arranged such that the tip ends of the first transfer needle group and the second transfer needle group are displaced from each other in the radial direction of the respective half- The first transfer needle group and the second transfer needle group are moved in a state in which the one end of the one transfer needle is accommodated in the other of the receiving grooves, A circular knitting machine system continuous in the direction of the needle axis. 18. The method of claim 17,
Wherein the transferring member is a conveying sinker having a belt-like conveying sinker main body and a tip portion formed at an acute angle with an inclined portion,
Wherein the leading end portion is thinner than the thickness of the conveyance sinker main body, and the thickness of the conveyance sinker main body is equal to the gap between the knitting needles. 19. The method of claim 18,
A feed sinker retracting mechanism for inserting the feed sinker from the outside into the gap between the knitting needles of the knitting needle cylinder in the radial direction of the knitting needle cylinder,
And a transfer sinker elevator for transferring the letter from the knitting needle to the transfer needle by inserting the tip of the transfer needle into the inner loop by moving the transfer sinker and the transferring sinker retracting mechanism in the axial direction of the knitting needle Circular knitting machine system. 20. The method according to claim 18 or 19,
Before the transfer of the inner loop to the transfer needle, the transfer sinker is inserted into the gap between the knitting needles from above the letter, then lowered, The knitting machine system which adjusts the height of the knitting machine. 20. A method according to any one of claims 18 to 20, wherein said method further comprises the steps of:
A letter transfer device for transferring the letter to the sewing machine unit to seal the inner loop after the inner loop is transferred to the transfer needle,
And a rotating mechanism for rotating the fixed half-dial in the circumferential direction in conjunction with the elevation of the sewing machine needle of the sewing machine unit. 22. The method of claim 21,
Wherein the transfer needle on the fixed half dial side has a sewing machine needle guide groove in the axial direction and guides the sewing machine needle by the sewing machine needle guide groove when the sewing machine needle is lifted or lowered. 23. The method of claim 22,
The sewing machine unit is selectively set to a first sewing position where the sewing machine needle enters the sewing machine needle guide groove and a second sewing position located inside the letter than the first sewing position, Of the sewing machine unit can be sewn by the sewing machine unit in the first sewing and the second sewing in the second sewing position. 24. The method of claim 23,
A half ring arranged on the inside of the fixed half-dial, and a letter pressing portion arranged to face the half-ring, the inner loop is separated from the transfer needle, And the second sewing is performed.

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