JP2011093691A - Method of manufacturing yarn knot and device thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a strong yarn knot in a short stranding part and a device thereof, without an appearance of a defect such as yarn loosens and an end projects, since initial yarn and switching yarn are beautifully separated without being mixed in the stranding part. <P>SOLUTION: The initial yarn 1 and the switching yarn 2 are twisted twice in a twisting part C by a rotary shaft 15 with a nozzle, and after cutting by leaving the length for folding back the initial yarn 1, air is jetted from yarn sending nozzles 14a and 15b, and the initial yarn 1 and the initial yarn tip 1a, and the switching yarn 2 and the switching yarn tip 2a are stranded while folding back, and the initial yarn side forms an stranding part T1, and the switching yarn 2 side forms an stranding part T2 with the twisting part C as a boundary line, and is switched to the switching yarn 2, so that the initial yarn and the switching yarn are beautifully separated without being mixed even in spun yarn and hand spun silk yarn (such as Operon (R), spandex and nylon), and a novel strong yarn knot can be performed even in the short stranding part, and the defect such as the yarn loosens and the end projects can be further surely prevented. The yarn knot of appending yarn of mutual 1-3 pieces required for knitting can be performed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a manufacturing method and an apparatus for connecting a yarn when the yarn supplied to a weaving machine or the like is finished and the yarn is switched.

A conventional splicer device for knotless connection sends the tip of the yarn 2 to be connected to the yarn 1 to a certain position, and as shown in FIG. 16, the tip of the yarn 1 and the yarn 2 at that position. At the same time, and the twisted portion is formed by the swirling flow of air until the thread 1 is sufficiently close to the cutting position. (For example, refer to Patent Document 1).

FIG. 17 shows that two spun yarn ends are folded back in a “J” shape, facing each other so that the folded portions are coupled to each other, and the leading ends of the spun yarns are entangled with the proximal end side of the folded portions. , Respectively. (For example, refer to Patent Document 2).

JP 10-279190 Japanese Laid-Open Patent Publication No. 2006-219209

However, according to the connection method of FIG. 16, since the colors of the twisted portions are inevitably mixed if the colors of the yarn 1 and the yarn 2 are different, if the twisted portion is shortened as much as possible, the yarn is unwound or the terminal protrudes. There is a problem that the defect appears.

According to the connection method of FIG. 17, the two spun yarns are not securely fixed at the joining position. Therefore, if the entangled portion is shortened, the yarn is easily unwound, and if the entangled portion is lengthened, the entangled portion becomes 1 There are problems such as darker colors compared to book parts.

Therefore, the problem of the present invention is that the original yarn and the switching yarn are not mixed well at the twisted portion, and the defects such as the unraveling of the yarn and the protruding end do not appear, and the strong twisted knot at the short twisted portion. A manufacturing method and an apparatus thereof are provided.

In order to solve the above-mentioned problem, the first invention twists a parallel base yarn and a switching yarn twice, cuts leaving the length of the base yarn turning back from the twisted portion, The yarn knot manufacturing method is characterized in that twisting is performed while turning back, and the tip of the switching yarn is twisted while folding back with the switching yarn, and the base yarn and the switching yarn are tied.

The second invention includes a step of providing two nozzles for each of the moving means and the fixing means, passing the base yarn and the switching yarn through the two nozzles, and twisting the base yarn and the switching yarn twice, Cutting the vicinity of the nozzle inlet, turning the base yarn tip back to the nozzle outlet while twisting the base yarn at the boundary between the moving means and the fixing means, and the switching yarn tip is the switching yarn 2. The yarn knot manufacturing method according to claim 1, wherein the method includes a step of turning back to the vicinity of the nozzle inlet while twisting and a step of passing the nozzle hole through which the base yarn and the switching yarn pass by the moving means.

The third aspect of the present invention is the yarn knot manufacturing method according to claim 2, further comprising the step of tightly twisting the base yarn tip and the base yarn and tightly twisting the switching yarn tip and the switching yarn.

The fourth invention includes a step of clamping the switching yarn tip and the switching yarn together by the thread pressing means near the nozzle inlet before tightly twisting the leading yarn tip and the original yarn, the switching yarn tip and the switching yarn, and the vicinity of the nozzle outlet. 4. The yarn knot manufacturing method according to claim 3, wherein a step of clamping and lowering the leading end of the base yarn and the base yarn together by the yarn pressing means is added.

The fifth aspect of the invention is a fixed shaft with a nozzle attached in the vicinity of the inlet of the through-hole, and a rotary shaft with a nozzle rotatably attached in the vicinity of the outlet of the through-hole, in a through-hole provided in a substantially central portion of the apparatus body Two cylindrical yarn feed nozzles attached to the fixed shaft, two cylindrical yarn feed nozzles attached to the rotary shaft, and a base yarn provided on a contact surface between the fixed shaft and the rotary shaft; A twist portion for twisting the switching yarn, and an indexing means provided on the rotating shaft; the base yarn is inserted from one yarn feeding nozzle of the fixed shaft and is pulled out to one yarn feeding nozzle of the rotating shaft; The switching yarn is a yarn tying device which is inserted from the other yarn feeding nozzle of the fixed shaft and comes out of the other yarn feeding nozzle of the rotating shaft.

The sixth aspect of the invention is that the two yarn feed nozzles of the fixed shaft with nozzle have a plurality of spiral air ejection holes directed from the upstream to the downstream of the cylinder, and the two yarn feed nozzles of the rotary shaft with nozzle are: 6. The yarn knot device according to claim 5, further comprising a plurality of spiral air ejection holes directed from the downstream side to the upstream side of the cylinder.

7. The yarn according to claim 5, wherein a nozzle that generates a spiral flow is arranged in each yarn feed nozzle of the rotary shaft with nozzle near the center of the through hole. A knotting device.

The eighth invention is the yarn knot device according to claim 7, wherein the nozzle has a plurality of spiral air ejection holes directed from the upstream side to the downstream side of the cylinder.

9. The yarn knot according to claim 5, wherein the thread presser is provided near the entrance and the exit of the through-hole, and the thread presser near the exit is lowered. Device.

Since this invention is comprised as mentioned above, there exist the following effects.
According to the first aspect of the present invention, the parallel main yarn and the switching yarn are twisted twice, the length of the main yarn is cut back from the twisted portion, and the front yarn tip is twisted back while being folded back with the main yarn. The tip of the switching yarn is twisted while being folded back with the switching yarn, and the original yarn and the switching yarn are tied together, so that the position is fixed at the twisted part in the above-mentioned two-twisting twist, it does not become a large lump, the strength is maintained, and the yarn can be unwound Can be reliably prevented. Since the position of the twisted portion is not fixed in one rotation twist, the yarn is easy to unwind, and in the three rotation twist, the twisted portion becomes a large lump, so that it is caught by the knitting needle during knitting, and yarn breakage is likely to occur. Even with spun yarn and spun yarn (operon, spandex, nylon, etc.), the original yarn and the switching yarn are not mixed well, and they are neatly separated, and even with a short twisted part, a strong yarn knot can be formed and the yarn can be unwound and the end protrudes Defects such as can be prevented more reliably. Furthermore, since the yarns are twisted together, 1 to 3 spliced yarns necessary for knitting can be formed.

According to the second aspect of the present invention, two nozzles are provided on each of the moving means and the fixing means, the base yarn and the switching yarn are passed through the two nozzles, and the base yarn and the switching yarn are twisted twice. A step of cutting the base yarn near the nozzle inlet, a step of turning the base yarn tip back to the nozzle outlet while twisting the base yarn at the boundary of the dividing surface of the moving means and the fixing means, and switching The yarn tip is turned around the nozzle inlet while twisting with the switching yarn, and the moving means is passed through the nozzle hole through which the original yarn and the switching yarn pass, so that the yarn is positioned at the twisting portion in the two-turn twisting. Is fixed, it does not become a large lump, the strength is maintained, and the defect that the yarn can be unraveled can be reliably prevented. Since the position of the twisted portion is not determined by twisting once by rotation, the yarn is easily unwound, and by twisting three times, the twisted portion becomes a large lump, so that it is caught by the knitting needle at the time of knitting, and yarn breakage is likely to occur. By passing through the nozzle hole through which the base yarn and the switching yarn pass, resistance during yarn traveling can be reliably prevented. Even with spun yarn and spun yarn (operon, spandex, nylon, etc.), the original yarn and the switching yarn are not mixed well, and they are neatly separated, and even with a short twisted part, a strong yarn knot can be formed and the yarn can be unwound and the end protrudes Defects such as can be prevented more reliably. Furthermore, since the yarns are twisted together, 1 to 3 spliced yarns necessary for knitting can be formed.

According to the invention described in claim 3, by twisting the base yarn tip and the base yarn tightly and by twisting the switching yarn tip and the switching yarn tightly, defects such as unraveling of the yarn and protrusion of the terminal can be prevented more reliably. At the same time, the thickness of the yarn where the yarn is twisted together with one piece can be made uniform, and the twisted portion can be made inconspicuous.

According to the fourth aspect of the present invention, the step of clamping the switching yarn tip and the switching yarn together by the yarn pressing means near the nozzle inlet before tightly twisting the leading yarn tip and the leading yarn and the switching yarn tip and the switching yarn. And by clamping and lowering the base yarn tip and the base yarn together by the yarn pressing means near the nozzle outlet, the twisted portion of the base yarn and the switching yarn has a margin corresponding to the lowering of the yarn pressing means, Twists can be tightly coupled, and even a short twisted part can make unprecedented strong yarn knots and more reliably prevent defects such as unraveling of yarns and protruding ends.

According to the fifth aspect of the present invention, a fixed shaft with a nozzle attached in the vicinity of the inlet of the through hole and a rotary shaft in the vicinity of the outlet of the through hole are rotatably attached to a through hole provided in a substantially central portion of the apparatus main body. A rotating shaft with a nozzle, two cylindrical thread feeding nozzles attached to the fixed shaft, two cylindrical thread feeding nozzles attached to the rotating shaft, and a contact surface between the fixed shaft and the rotating shaft. A twist portion for twisting the provided main yarn and the switching yarn; and an indexing means provided on the rotary shaft; the main yarn is inserted from one yarn feed nozzle of the fixed shaft; and one yarn of the rotary shaft The thread is switched to the feed nozzle, and the switching thread is inserted from the other thread feed nozzle of the fixed shaft and is removed from the other thread feed nozzle of the rotating shaft. Therefore, even with spun yarn and spun yarn (operon, spandex, nylon, etc.) The yarn and changeover yarn are not mixed and neatly separated Even with a short twisted portion can robust knotting ever, the thread terminal broken or be more reliably prevented defects such as protruding. Furthermore, since the yarns are twisted together, 1 to 3 spliced yarns necessary for knitting can be formed.

According to the sixth aspect of the present invention, the two yarn feed nozzles of the fixed shaft with nozzle have a plurality of spiral air ejection holes directed from the upstream side to the downstream side of the cylinder, and The yarn feed nozzle has a plurality of spiral air ejection holes that run from the downstream to the upstream of the cylinder, so that the tip of the yarn can be reliably attracted to any nozzle, and the main yarn and the switching yarn intersect twice. After that, the main yarn tip and the main yarn, and the switching yarn tip and the switching yarn are folded back while twisting, so even the spun yarn and spun yarn (operon, spandex, nylon, etc.) are neatly separated and short. Even at the twisted portion, unprecedented strong yarn knotting can be achieved, and defects such as unraveling of the yarn and protruding ends can be more reliably prevented. Furthermore, since the yarns are twisted together, 1 to 3 spliced yarns necessary for knitting can be formed.

According to the seventh aspect of the present invention, since the nozzle that generates the swirl flow is arranged in each yarn feeding nozzle of the rotating shaft with nozzle near the center of the through-hole, defects such as unraveling the yarn and protruding ends Can be more reliably prevented, and the thickness of the yarn where the yarn is twisted together can be made uniform, and the twisted portion can be made inconspicuous.

According to the invention described in claim 8, since the nozzle has a plurality of spiral air ejection holes directed from the upstream side to the downstream side of the cylinder, defects such as unraveling of the yarn and protrusion of the terminal are more reliably ensured. In addition to preventing this, it is possible to make the thickness of the yarn where the yarn is twisted together with one piece uniform and make the twisted portion inconspicuous.

According to the invention of claim 9, the yarn pressing means is provided in the vicinity of the inlet and the outlet of the through hole, and the yarn pressing means in the vicinity of the outlet is lowered so that the twisted portion of the base yarn and the switching yarn is There is a margin for the lowering of the thread holding means, and the twist can be tightly twisted, and even with a short twisted portion, unprecedented strong yarn knotting can be achieved, and the defects such as unraveling the yarn and protruding ends Can be prevented more reliably.

Schematic longitudinal front view showing an example of the apparatus of the present invention Plan view of the main part of the detection unit for indexing Schematic longitudinal front view of upper thread retainer Top view of the main part of the upper thread retainer Schematic longitudinal front view showing the operation of the device of the present invention The same figure as above Cross section of fixed shaft with nozzle, nozzle that generates spiral flow of rotating shaft, and yarn feed nozzle Schematic longitudinal front view showing the operation of the device of the present invention The same figure as above The same figure as above The same figure as above The same figure as above The same figure as above The same figure as above Front view showing the thread connection in this device Front view showing a conventional threaded connection Front view showing a conventional threaded connection

Embodiments of the present invention will be described below with reference to FIGS. 1 to 15, but the present invention is not limited to these embodiments as long as the gist of the present invention is not exceeded.

FIG. 1 is a schematic longitudinal sectional front view of a yarn knotting apparatus according to a yarn knotting method in a knitting machine or the like of the present invention. FIG. 2 is a plan view of an essential part of the index detection unit. FIG. 3 is a schematic longitudinal front view of the upper thread presser. FIG. 4 is a plan view of the main part of the upper thread presser. 5 and 6 are schematic longitudinal front views showing the operations of the respective parts of the yarn knotting apparatus according to the yarn knotting method in the knitting machine or the like of the present invention. FIG. 7 is a main part plan view showing the positional relationship between the fixed shaft with nozzle, the rotary shaft with nozzle, the nozzles for generating the spiral flow, and the nozzles that generate the spiral flow. 8 to 14 are schematic longitudinal front views showing the operations of the respective parts of the yarn knotting apparatus according to the yarn knotting method in the knitting machine or the like of the present invention. In addition, the yarn knot device in the knitting machine or the like of the present invention is a splicer device connected to the above-described conventional knotless (knotless), except for the configurations shown in FIGS. 1 to 4 and FIG. Since they are the same, detailed description is omitted and the same reference numerals are used for the same constituent members.

As shown in FIG. 1, a fixed shaft 14 with a nozzle is provided in the middle portion of the through-hole 12 provided in the main body 10 so as to surround the through-hole 12, and a rotary shaft 15 with a nozzle is provided at the outlet portion. Is arranged. And the twist part C which cross | intersects the original yarn A and the switching yarn B 2 times is provided in the center vicinity of the said through-hole 12. As shown in FIG. The twisted portion C is provided on the contact surface between the fixed shaft 14 and the rotating shaft 15. Cylindrical thread feed nozzles 14 a and 14 b are provided on the fixed shaft 14 symmetrically with respect to the through-hole 12. As will be described later, the yarn feed nozzles 14a and 14b are air outlets for turning the tip of the original yarn A cut after twisting twice while twisting the original yarn A together. On the inlet side of the rotary shaft 15, nozzles 15c and 15d for generating a cylindrical spiral flow are provided concentrically with the yarn feed nozzles 14a and 14b. As will be described later, the nozzles 15c and 15d that generate the spiral flow are twisted twice and then twisted together while twisting the tip of the base yarn A and the base yarn A, and the tip of the switching yarn B and the switching yarn B It is a nozzle for tightly twisting. On the outlet side of the rotary shaft 15, cylindrical thread feed nozzles 15a and 15b are provided concentrically with the respective thread feed nozzles. As will be described later, the yarn feed nozzles 15a and 15b are air outlets for turning back the switching yarn B after twisting the switching yarn B after twisting twice. Furthermore, the main body 10 is provided with six ports 101a to 101f that are orthogonal to the vertical center lines of the nozzles 14a, 14b, and 15a to 15d. In FIG. 1, the original yarn A (yarn currently supplied to the knitting machine or the like) passes through the nozzles 14a, 15c and 15a, and the switching yarn is clamped by the clamp piece 13b. Of course, it is possible to arbitrarily select which yarn feed nozzles 14a and 14b attract the base yarn A, and the switching yarn B is attracted to the yarn feed nozzle through which the base yarn A does not pass.

As shown in FIG. 1, a pair of thread pressers 34 that clamp the switching thread and the switching thread tip at the same time are provided near the entrance of the through-hole 12. As shown in FIG. 11, the thread retainer 34 is continuous with the pistons 341a and 341b. When compressed air is introduced into the ports 343a and 343b, the pistons 341a and 341b move toward the center of the main body 10 and are clamped. It is like that. When the compressed air is released, the pistons 341a and 341b are returned to their original positions by the springs 342a and 342b, and the clamp is released. FIG. 1 shows a state in which the clamp is released, and FIG. 11 shows a state in which it is clamped.

As shown in FIGS. 1 and 2, an indexing pulley 31 is rotatably fixed to the rotary shaft 15 with nozzle on the outlet side. The rotating shaft 15 is rotated by transmitting the rotation of the motor pulley 32 attached to the motor 321a to the indexing pulley 31 by the belt 322a. An indexing detection bar 31a is attached to the upper surface of the indexing pulley 31 to detect the rotational speed and stop position by the indexing sensor 311a, and the half-rotation stop position is detected at the half-rotation position. For this purpose, an indexing detection bar 31b is attached. Further, a positioning stopper 33 is provided for positioning the rotary shaft 15 in two or half rotations against the detection rod 31a or 31b. The positioning stopper 33 is projected or retracted by the cylinder 331a. In FIG. 2, since it is rotating, it is retracted.

As shown in FIGS. 3 and 4, a pair of thread pressers 16 that clamp the base yarn A and the tip of the base thread A together are provided near the exit of the through-hole 12. In the thread retainer 16, the thread retainer levers 161a and 161b are rotated about the pins 163a and 163b by a cylinder 16a so as to approach or separate from each other. Further, the cylinder 16b is lowered and raised with the shaft 162a as a base point.

Next, the operation of this apparatus will be described. Assume that the base yarn A is continuously supplied to a knitting machine or the like in the state shown in FIG. The original yarn A passes through the yarn introduction path 11a and passes through the yarn feed nozzle 14a of the fixed shaft 14 with nozzle provided in the through-hole 12, the nozzle 15c that generates a spiral flow of the rotary shaft 15 with nozzle, and the yarn feed nozzle 15a. It is supplied to knitting machines and the like. On the other hand, the switching yarn B passes through the yarn introduction path 11b, and its tip is clamped by the protruding portion 10a near the exit of the yarn introduction path 11b and the clamp piece 13b.

When a yarn switching signal is sent from the knitting machine or the like, the knitting machine or the like is stopped and the supply of the base yarn A is stopped. Then, as shown in FIG. 5, the clamp at the tip of the switching yarn B is released to make it free, and at the same time, compressed air is introduced into the yarn introduction path 11b, air is ejected into the through-hole 12, and simultaneously the yarn feed nozzle from the port 101b. When compressed air is sent to 14b, a spiral flow is formed in the yarn feed nozzle 14b from the ejection hole 141b, the tip of the switching yarn B near the outlet of the introduction path 11b passes through the through-hole 12, and the direction of the yarn feed nozzle 14b Further, it is fed to the position of the thread presser 16 along the nozzle 15d and the thread feed nozzle 15b that generate a spiral flow together with the ejected air. The ejection hole 141a of the yarn feed nozzle 14a and the ejection hole 141b of the nozzle 14b are formed in a spiral shape from upstream to downstream as shown in FIGS. This shape forms a downstream spiral flow.

As shown in FIG. 6, when the tip of the switching thread B reaches the thread retainer 16, the cylinder 331a of FIG. 2 is operated to move the positioning stopper 33 backward from the indexing detection bar 31b. When the motor 321a is operated and the rotation of the motor pulley 32 is transmitted to the indexing pulley 31 by the belt 322a, the rotating shaft 15 with the nozzle rotates. When the indexing sensor 311a senses the detection rod 31b at the time of one and a half rotations, the stopper 33 protrudes and hits the detection rod 31b at a position of two revolutions, and the sensor 311a senses the indexing detection rod 31a. The motor 321a stops. At that time, air is ejected from the yarn feed nozzle 14b, and the tip of the switching yarn B is kept at the position of the yarn presser 16 near the exit of the through-hole 12. As a result, the original yarn A passing through the nozzles 14a, 15c and 15a and the switching yarn B passing through the nozzles 14b, 15d and 15b are twisted twice at the twisted portion C.

Air is appropriately ejected from the yarn feed nozzle 14b for an appropriate time, and as shown in FIG. 8, the clamp piece 13a is advanced while holding the tip of the switching yarn B, and the base yarn A is clamped between the protruding portion 10a. Further, the cutter 17a is further advanced to cut the base yarn A. After cutting, the cutter 17a is retracted as shown in FIG.

Therefore, as shown in FIG. 9, when compressed air is sent from the port 101a to the yarn feed nozzle 14a and a downstream spiral flow is formed in the yarn feed nozzle 14a from the ejection hole 141a, the base yarn near the outlet of the yarn introduction path 11a is formed. The tip of A is sucked toward the through-hole 12, passes through the nozzle 14 a, turns back onto the twisted portion while twisting with the original yarn A in the nozzles 15 c and 15 a, and reaches the yarn presser 16 near the through-hole 12 outlet. Sent. When compressed air is sent from the port 101f to the yarn feed nozzle 15b and an upstream spiral flow is formed in the yarn feed nozzle 15b from the ejection hole 151b, the tip of the switching yarn B at the location of the yarn presser 16 is directed toward the through-hole 12. Then, it passes through the nozzles 15b and 15d and turns back to the bottom of the twisted portion while being twisted with the switching yarn B in the nozzle 14b, and is sent to the yarn presser 34 near the entrance of the through hole 12. As a result, the base yarn A and the switching B are twisted twice in the twisted portion C. As shown in FIGS. 7C and 9, the ejection hole 151a of the yarn feed nozzle 15a and the ejection hole 151b of the nozzle 15b are spirally formed from the downstream side to the upstream side. This shape forms an upstream spiral flow.

In FIG. 9, the base yarn A is along the nozzles 15 a and 15 c of the rotary shaft 15 with nozzle, and the switching yarn B is along the nozzle 14 b of the fixed shaft 14 with nozzle that is symmetric with respect to the through-hole 12. Therefore, as shown in FIG. 10, the nozzles 15a and 15c through which the base yarn A passes and the nozzle 14b through which the switching yarn B passes are concentric so that the yarn can be smoothly fed as shown in FIG. Then, the positioning stopper 33 is moved away from the indexing detection rod 31b, and the motor 321a is operated to rotate the rotating shaft 15 with the nozzle fixed together with the indexing pulley 31 in the clockwise direction. When the indexing detection bar 31a is disengaged from the indexing sensor 311a, the stopper 33 protrudes, hits the detection bar 31a at a half-rotation position, and when the sensor 311a senses the detection bar 31b, the motor 321a stops. .

As shown in FIG. 11, when the nozzle through which the base thread A and the switching thread B pass is concentric, as shown in FIGS. 3 and 4, the cylinder 16a is operated and the thread presser lever 161a is pushed. The lever 161a rotates with the pin 163a as the base point, and the symmetric thread presser lever 161b rotates in the opposite direction to the lever 161a with the pin 163b as the base point by the meshing portion E. Accordingly, the leading ends of the base yarn A and the base yarn A are clamped together with the thread presser 16 attached to the ends of the levers 161a and 161b as shown in FIG. Further, the cylinders 341a and 341b are operated, and the switching thread B and the tip of the switching thread B are clamped together by the thread retainer 34. Then, as shown in FIGS. 3 and 4, the cylinder 16b is protruded, the levers 161a and 161b are rotated around the shaft 162a, and the thread retainer 16 is lowered to the vicinity of the exit of the through-hole 12. As a result, as shown in FIG. 12, the yarns A and B clamped between the thread retainer 34 and the thread retainer 16 have a margin corresponding to the descending amount of the thread retainer 16. This margin is a margin necessary for twisting the yarns A and B.

Therefore, when the compressed air is appropriately sent from the time port 101d to the nozzle 15c generating the spiral flow and the spiral flow is formed in the nozzle 15c generating the spiral flow from the ejection hole 151c, the original yarn A is twisted as shown in FIG. The portion T1 is sufficiently twisted between the twisted portion C and the yarn presser 16. At the same time, the twisted portion T2 of the switching yarn B is sufficiently twisted between the twisted portion C and the yarn presser 34 in the direction opposite to the original yarn side. As shown in FIG. 7B and FIG. 12, the ejection holes 151c of the nozzle 15c and the ejection holes 151d of the nozzle 15c that generate the spiral flow are formed in a spiral shape from upstream to downstream. A spiral flow is formed by this shape. Then, the operation of the cylinder 16b in FIGS. 3 and 4 is operated to raise the thread retainer 16 to the original position, and the operation of the cylinder 16a releases the clamp of the original thread A by the thread retainer 16. Further, the cylinders 341a and 341b are operated to release the clamp of the switching thread B by the thread retainer 34. As a result, the switching between the yarns A and B is completed, and the switching yarn B is supplied to the knitting machine or the like instead of the base yarn A as shown in FIG.

Further, the operation of the clamp pieces 13a and 13b, the operation of the yarn feed nozzles 14a, 14b, 15a and 15b, the operation of the rotary nozzle 15, the operation of the cutters 17a and 17b, the operation of the yarn presser 16, the operation of the yarn presser 34, and the generation of the spiral flow There is provided a control device for controlling the operation of the nozzles 15c, 15d to be performed in accordance with the above order.

DESCRIPTION OF SYMBOLS 1, 2 Yarn 1a, 2a Yarn end A Original yarn B Switching yarn C Twisting part E Interlocking part T1 Twisting part T2 Twisting part 10 Main body 10a Protrusion part 101a-101f Port 11a-11f Thread introduction path 12 Through port 13a , 13b Clamp piece 14 Fixed shaft 14a with nozzle, 14b Yarn feed nozzle 141a, 141b Ejection hole 15 Fixed shaft 15a with nozzle 15a, 15b Yarn feed nozzle 15c, 15d Nozzle 151a-151d for generating spiral flow Ejection hole 16 Yarn retainer 16a, 16b Cylinders 161a, 161b Thread holding lever 162a Shaft 163a, 163b Pins 17a, 17b Cutter 31 Indexing pulley 31a, 31b Indexing detection rod 311a Indexing sensor 32 Motor pulley 321a Motor 322a Belt 33 Positioning stopper 331a Cylinder 34 Pressing 341a, 341b pistons 342a, 342b pins 343a, 343b spring 344a, 344b port

The present invention relates to a manufacturing method and an apparatus for connecting a yarn when the yarn supplied to a weaving machine or the like is finished and the yarn is switched.

A conventional splicer device for knotless connection sends the tip of the yarn 2 to be connected to the yarn 1 to a certain position, and as shown in FIG. 16, the tip of the yarn 1 and the yarn 2 at that position. At the same time, and the twisted portion is formed by the swirling flow of air until the thread 1 is sufficiently close to the cutting position. (For example, refer to Patent Document 1).

FIG. 17 shows that two spun yarn ends are folded back in a “J” shape, facing each other so that the folded portions are coupled to each other, and the leading ends of the spun yarns are entangled with the proximal end side of the folded portions. , Respectively. (For example, refer to Patent Document 2).

JP 10-279190 Japanese Laid-Open Patent Publication No. 2006-219209

However, according to the connection method of FIG. 16, since the colors of the twisted portions are inevitably mixed if the colors of the yarn 1 and the yarn 2 are different, if the twisted portion is shortened as much as possible, the yarn is unwound or the terminal protrudes. There is a problem that the defect appears.

According to the connection method of FIG. 17, the two spun yarns are not securely fixed at the joining position. Therefore, if the entangled portion is shortened, the yarn is easily unwound, and if the entangled portion is lengthened, the entangled portion becomes 1 There are problems such as darker colors compared to book parts.

Therefore, the problem of the present invention is that the original yarn and the switching yarn are not mixed well at the twisted portion, and the defects such as the unraveling of the yarn and the protruding end do not appear, and the strong twisted knot at the short twisted portion. A manufacturing method and an apparatus thereof are provided.

In order to solve the above-mentioned problem, the first invention twists the base yarn and the switching yarn twice , cuts the length of the base yarn while turning back from the twisted portion, and the base yarn tip is folded back with the base yarn. The yarn knot manufacturing method is characterized in that twisting and switching yarn tips are twisted while being folded back with the switching yarn, and the base yarn and switching yarn are tied.

The second invention includes a step of providing two nozzles for each of the moving means and the fixing means, passing the base yarn and the switching yarn through the two nozzles, and twisting the base yarn and the switching yarn twice , Cutting the vicinity of the nozzle inlet, a step of twisting the base yarn with the base yarn while turning back to the vicinity of the nozzle outlet at the boundary between the moving means and the fixing means, and the switching yarn tip is the nozzle The yarn knot manufacturing method according to claim 1, wherein the method further comprises a step of twisting together with the switching yarn while turning back to the vicinity of the entrance, and a step of passing the nozzle hole through which the base yarn and the switching yarn pass by the moving means.

The third aspect of the present invention is the yarn knot manufacturing method according to claim 2, further comprising the step of tightly twisting the base yarn tip and the base yarn and tightly twisting the switching yarn tip and the switching yarn.

The fourth invention includes a step of clamping the switching yarn tip and the switching yarn together by the thread pressing means near the nozzle inlet before tightly twisting the leading yarn tip and the original yarn, the switching yarn tip and the switching yarn, and the vicinity of the nozzle outlet. 4. The yarn knot manufacturing method according to claim 3, wherein a step of clamping and lowering the leading end of the base yarn and the base yarn together by the yarn pressing means is added.

The fifth aspect of the invention is a fixed shaft with a nozzle attached in the vicinity of the inlet of the through-hole, and a rotary shaft with a nozzle rotatably attached in the vicinity of the outlet of the through-hole, in a through-hole provided in a substantially central portion of the apparatus body. Two cylindrical yarn feed nozzles attached to the fixed shaft, two cylindrical yarn feed nozzles attached to the rotary shaft, and a base yarn provided on a contact surface between the fixed shaft and the rotary shaft; A twist portion for twisting the switching yarn twice ; and an indexing means provided on the rotary shaft; the base yarn is inserted from one yarn feed nozzle of the fixed shaft and is fed to one yarn feed nozzle of the rotary shaft The disconnecting / switching yarn is inserted from the other yarn feeding nozzle of the fixed shaft and is removed from the other yarn feeding nozzle of the rotating shaft.

The sixth aspect of the invention is that the two yarn feed nozzles of the fixed shaft with nozzle have a plurality of spiral air ejection holes directed from the upstream to the downstream of the cylinder, and the two yarn feed nozzles of the rotary shaft with nozzle are: 6. The yarn knot device according to claim 5, further comprising a plurality of spiral air ejection holes directed from the downstream side to the upstream side of the cylinder.

7. The yarn according to claim 5, wherein a nozzle that generates a spiral flow is arranged in each yarn feed nozzle of the rotary shaft with nozzle near the center of the through hole. A knotting device.

The eighth invention is the yarn knot device according to claim 7, wherein the nozzle has a plurality of spiral air ejection holes directed from the upstream side to the downstream side of the cylinder.

9. The yarn knot according to claim 5, wherein the thread presser is provided near the entrance and the exit of the through-hole, and the thread presser near the exit is lowered. Device.

Since this invention is comprised as mentioned above, there exist the following effects.
According to the first aspect of the present invention, the base yarn and the switching yarn are twisted twice, the length of the base yarn is turned back from the twisted portion and cut, and the tip of the base yarn is twisted back while turning back to the base yarn. The tip of the yarn is twisted while turning back to the switching yarn, and the original yarn and the switching yarn are tied together, so that the position is fixed at the twisted part in the above-mentioned two-twisting , it does not become a big lump, the strength is maintained, and the yarn can be unwound. Can be prevented. Since the position of the twisted portion is not fixed in the single twist , the yarn is easily unwound, and in the third twist , the twisted portion becomes a large lump, so that the yarn is caught by the knitting needle at the time of knitting, and the yarn is easily broken. Even with spun yarn and spun yarn (operon, spandex, nylon, etc.), the original yarn and the switching yarn are not mixed well, and they are neatly separated, and even with a short twisted part, a strong yarn knot can be formed and the yarn can be unwound and the end protrudes Defects such as can be prevented more reliably. Furthermore, since the yarns are twisted together, 1 to 3 spliced yarns necessary for knitting can be formed.

According to the second aspect of the present invention, two nozzles are provided in each of the moving means and the fixing means, the base yarn and the switching yarn are passed through the two nozzles, and the base yarn and the switching yarn are twisted twice. A step of cutting the base yarn near the nozzle inlet, a step of twisting the base yarn with the base yarn at the dividing surface of the moving means and the fixing means and turning back to the vicinity of the nozzle outlet , and switching The yarn tip is twisted in the twisted portion when twisted twice by passing the nozzle hole through which the base yarn and the switching yarn pass by the step of twisting the switching yarn while turning back to the vicinity of the nozzle entrance Is fixed, it does not become a large lump, the strength is maintained, and the defect that the yarn can be unraveled can be reliably prevented. Twisting once does not determine the position of the twisted part, so the yarn is easy to unwind . If twisting three times , the twisted part becomes a large lump, so that it is caught by the knitting needle during knitting, and yarn breakage is likely to occur. By passing through the nozzle hole through which the base yarn and the switching yarn pass, resistance during yarn traveling can be reliably prevented. Even with spun yarn and spun yarn (operon, spandex, nylon, etc.), the original yarn and the switching yarn are not mixed well, and they are neatly separated, and even with a short twisted part, a strong yarn knot can be formed and the yarn can be unwound and the end protrudes Defects such as can be prevented more reliably. Furthermore, since the yarns are twisted together, 1 to 3 spliced yarns necessary for knitting can be formed.

According to the invention described in claim 3, by twisting the base yarn tip and the base yarn tightly and by twisting the switching yarn tip and the switching yarn tightly, defects such as unraveling of the yarn and protrusion of the terminal can be prevented more reliably. At the same time, the thickness of the yarn where the yarn is twisted together with one piece can be made uniform, and the twisted portion can be made inconspicuous.

According to the fourth aspect of the present invention, the step of clamping the switching yarn tip and the switching yarn together by the yarn pressing means near the nozzle inlet before tightly twisting the leading yarn tip and the leading yarn and the switching yarn tip and the switching yarn. Then, the main yarn tip and the main yarn are clamped together by the yarn pressing means near the nozzle outlet and lowered, so that the twisted portion of the main yarn side and the switching yarn side has a margin for the lowering of the yarn pressing means. It can be twisted tightly enough, and even with a short twisted part, unprecedented strong yarn knotting can be achieved, and defects such as unraveling and protruding ends can be more reliably prevented , and the yarn It is possible to make the thickness of the yarn twisted with one place uniform and make the twisted portion inconspicuous.

According to the fifth aspect of the present invention, a fixed shaft with a nozzle attached in the vicinity of the inlet of the through hole and a rotary shaft in the vicinity of the outlet of the through hole are rotatably attached to a through hole provided in a substantially central portion of the apparatus main body. A rotating shaft with a nozzle, two cylindrical thread feeding nozzles attached to the fixed shaft, two cylindrical thread feeding nozzles attached to the rotating shaft, and a contact surface between the fixed shaft and the rotating shaft. A twist portion for twisting the provided base yarn and the switching yarn twice, and an indexing means provided on the rotary shaft, and the base yarn is inserted from one yarn feed nozzle of the fixed shaft, and one of the rotary shafts Since the thread is inserted into the other thread feed nozzle of the fixed shaft and is removed from the other thread feed nozzle of the rotating shaft, spun yarn, spun yarn (operon, spandex, nylon, etc.) , Original yarn and switching yarn are not mixed beautifully, Also have twisted portions can robust knotting ever, the thread terminal broken or be more reliably prevented defects such as protruding. Furthermore, since the yarns are twisted together, 1 to 3 spliced yarns necessary for knitting can be formed.

According to the sixth aspect of the present invention, the two yarn feed nozzles of the fixed shaft with nozzle have a plurality of spiral air ejection holes directed from the upstream side to the downstream side of the cylinder, and The yarn feed nozzle has a plurality of spiral air ejection holes that are directed from the downstream to the upstream of the cylinder, so that the tip of the yarn can be reliably attracted to any nozzle, and the original yarn and the switching yarn are twisted twice. After that , the main yarn tip and the main yarn, and the switching yarn tip and the switching yarn are twisted together so that the spun yarn and spun yarn (operon, spandex, nylon, etc.) are neatly separated from the original yarn and the switching yarn. Even at the mating part, unprecedented strong yarn knotting can be achieved, and defects such as unraveling of the yarn and protruding ends can be more reliably prevented. Furthermore, since the yarns are twisted together, 1 to 3 spliced yarns necessary for knitting can be formed.

According to the seventh aspect of the present invention, since the nozzle that generates the swirl flow is arranged in each yarn feeding nozzle of the rotating shaft with nozzle near the center of the through-hole, defects such as unraveling the yarn and protruding ends Can be more reliably prevented, and the thickness of the yarn where the yarn is twisted together can be made uniform, and the twisted portion can be made inconspicuous.

According to the invention described in claim 8, since the nozzle has a plurality of spiral air ejection holes directed from the upstream side to the downstream side of the cylinder, defects such as unraveling of the yarn and protrusion of the terminal are more reliably ensured. In addition to preventing this, it is possible to make the thickness of the yarn where the yarn is twisted together with one piece uniform and make the twisted portion inconspicuous.

According to the ninth aspect of the present invention, the yarn pressing means is provided in the vicinity of the inlet and the outlet of the through hole, and the yarn pressing means in the vicinity of the outlet is lowered so that the twisted portion on the original yarn side and the switching yarn side is provided. However, there is an allowance corresponding to the descending amount of the yarn pressing means, and the twist can be tightly made by the allowance, and even in a short twisted portion, an unprecedented strong yarn knot can be formed, the yarn can be unraveled, the end can protrude, etc. Can be more reliably prevented , and the thickness of the yarn where the yarn is twisted together can be made uniform, and the twisted portion can be made inconspicuous.

Schematic longitudinal front view showing an example of the apparatus of the present invention Plan view of the main part of the detection unit for indexing Schematic longitudinal front view of upper thread retainer Top view of the main part of the upper thread retainer Schematic longitudinal front view showing the operation of the device of the present invention The same figure as above Cross section of fixed shaft with nozzle, nozzle that generates spiral flow of rotating shaft, and yarn feed nozzle Schematic longitudinal front view showing the operation of the device of the present invention The same figure as above The same figure as above The same figure as above The same figure as above The same figure as above The same figure as above Front view showing the thread connection in this device Front view showing a conventional threaded connection Front view showing a conventional threaded connection

Embodiments of the present invention will be described below with reference to FIGS. 1 to 15, but the present invention is not limited to these embodiments as long as the gist of the present invention is not exceeded.

FIG. 1 is a schematic longitudinal sectional front view of a yarn knotting apparatus according to a yarn knotting method in a knitting machine or the like of the present invention. FIG. 2 is a plan view of an essential part of the index detection unit. FIG. 3 is a schematic longitudinal front view of the upper thread presser. FIG. 4 is a plan view of the main part of the upper thread presser. 5 and 6 are schematic longitudinal front views showing the operations of the respective parts of the yarn knotting apparatus according to the yarn knotting method in the knitting machine or the like of the present invention. FIG. 7 is a main part plan view showing the positional relationship between the fixed shaft with nozzle, the rotary shaft with nozzle, the nozzles for generating the spiral flow, and the nozzles that generate the spiral flow. 8 to 14 are schematic longitudinal front views showing the operations of the respective parts of the yarn knotting apparatus according to the yarn knotting method in the knitting machine or the like of the present invention. In addition, the yarn knot device in the knitting machine or the like of the present invention is a splicer device connected to the above-described conventional knotless (knotless), except for the configurations shown in FIGS. 1 to 4 and FIG. Since they are the same, detailed description is omitted and the same reference numerals are used for the same constituent members.

As shown in FIG. 1, a fixed shaft 14 with a nozzle is provided in the vicinity of the inlet of the through-hole 12 provided in the main body 10, and a rotary shaft 15 with a nozzle is disposed in the vicinity of the outlet . A twisted portion C for twisting the base yarn A and the switching yarn B twice is provided near the center of the through hole 12. The twisted portion C is provided on the contact surface between the fixed shaft 14 with nozzle and the rotary shaft 15 with nozzle . Cylindrical thread feed nozzles 14 a and 14 b are provided on the fixed shaft 14 symmetrically with respect to the through-hole 12. As will be described later, these yarn feed nozzles 14a and 14b are air outlets for twisting the tip of the original yarn A cut after twisting twice with the original yarn A while turning back . On the inlet side of the rotary shaft 15, nozzles 15c and 15d for generating a cylindrical spiral flow are provided concentrically with the yarn feed nozzles 14a and 14b. As will be described later, the nozzles 15c and 15d that generate the spiral flow are twisted twice and then twisted while twisting back and twisted, and the front end of the base yarn A and the base yarn A are tightly twisted. It is a nozzle for tightly twisting. On the outlet side of the rotary shaft 15, cylindrical thread feed nozzles 15a and 15b are provided concentrically with the respective thread feed nozzles. As will be described later, the yarn feed nozzles 15a and 15b are air outlets for twisting together the switching yarn B while turning the tip of the switching yarn B after twisting twice . Furthermore, the main body 10 is provided with six ports 101a to 101f that are orthogonal to the vertical center lines of the nozzles 14a, 14b, and 15a to 15d. In FIG. 1, the original yarn A (yarn currently supplied to the knitting machine or the like) passes through the nozzles 14a, 15c and 15a, and the switching yarn is clamped by the clamp piece 13b. Of course, it is possible to arbitrarily select which yarn feed nozzles 14a and 14b attract the base yarn A, and the switching yarn B is attracted to the yarn feed nozzle through which the base yarn A does not pass.

As shown in FIG. 1, a pair of thread pressers 34 that clamp the switching thread and the switching thread tip at the same time are provided near the entrance of the through-hole 12. As shown in FIG. 11, the thread retainer 34 is continuous with the pistons 341a and 341b. When compressed air is introduced into the ports 343a and 343b, the pistons 341a and 341b move toward the center of the main body 10 and are clamped. It is like that. When the compressed air is released, the pistons 341a and 341b are returned to their original positions by the springs 342a and 342b, and the clamp is released. FIG. 1 shows a state in which the clamp is released, and FIG. 11 shows a state in which it is clamped.

As shown in FIGS. 1 and 2, an indexing pulley 31 is rotatably fixed to the rotary shaft 15 with nozzle on the outlet side. The rotating shaft 15 is rotated by transmitting the rotation of the motor pulley 32 attached to the motor 321a to the indexing pulley 31 by the belt 322a. An indexing detection bar 31a is attached to the upper surface of the indexing pulley 31 to detect the rotational speed and stop position by the indexing sensor 311a, and the half-rotation stop position is detected at the half-rotation position. For this purpose, an indexing detection bar 31b is attached. Further, a positioning stopper 33 is provided for positioning the rotary shaft 15 in two or half rotations against the detection rod 31a or 31b. The positioning stopper 33 is projected or retracted by the cylinder 331a. In FIG. 2, since it is rotating, it is retracted.

As shown in FIGS. 3 and 4, a pair of thread pressers 16 that clamp the base yarn A and the tip of the base thread A together are provided near the exit of the through-hole 12. In the thread retainer 16, the thread retainer levers 161a and 161b are rotated about the pins 163a and 163b by a cylinder 16a so as to approach or separate from each other. Further, the cylinder 16b is lowered and raised with the shaft 162a as a base point.

Next, the operation of this apparatus will be described. Assume that the base yarn A is continuously supplied to a knitting machine or the like in the state shown in FIG. The original yarn A passes through the yarn introduction path 11a and passes through the yarn feed nozzle 14a of the fixed shaft 14 with nozzle provided in the through-hole 12, the nozzle 15c that generates a spiral flow of the rotary shaft 15 with nozzle, and the yarn feed nozzle 15a. It is supplied to knitting machines and the like. On the other hand, the switching yarn B passes through the yarn introduction path 11b, and its tip is clamped by the protruding portion 10a near the exit of the yarn introduction path 11b and the clamp piece 13b.

When a yarn switching signal is sent from the knitting machine or the like, the knitting machine or the like is stopped and the supply of the base yarn A is stopped. Then, as shown in FIG. 5, the clamp at the tip of the switching yarn B is released to make it free, and at the same time, compressed air is introduced into the yarn introduction path 11b, air is ejected into the through-hole 12, and simultaneously the yarn feed nozzle from the port 101b. When compressed air is sent to 14b, a spiral flow is formed in the yarn feed nozzle 14b from the ejection hole 141b, and the tip of the switching yarn B near the outlet of the yarn introduction path 11b passes through the through-hole 12, and the yarn feed nozzle Then, the air is sucked in the direction of 14b and further sent to the position of the thread presser 16 along the nozzle 15d and the thread feed nozzle 15b that generate a spiral flow together with the ejected air. The ejection hole 141a of the yarn feed nozzle 14a and the ejection hole 141b of the yarn feed nozzle 14b are formed in a spiral shape from upstream to downstream as shown in FIGS. This shape forms a downstream spiral flow.

As shown in FIG. 6, when the tip of the switching thread B reaches the thread retainer 16, the cylinder 331a of FIG. 2 is operated to move the positioning stopper 33 backward from the indexing detection bar 31b. When the motor 321a is operated and the rotation of the motor pulley 32 is transmitted to the indexing pulley 31 by the belt 322a, the rotating shaft 15 with the nozzle rotates. When the indexing sensor 311a senses the detection rod 31b at the time of one and a half rotations, the stopper 33 protrudes and hits the detection rod 31b at a position of two revolutions, and the sensor 311a senses the indexing detection rod 31a. The motor 321a stops. At that time, air is ejected from the yarn feed nozzle 14b, and the tip of the switching yarn B is kept at the position of the yarn presser 16 near the exit of the through-hole 12. As a result, the base yarn A passing through the nozzles 14a, 15c and 15a and the switching yarn B passing through the nozzles 14b, 15d and 15b are twisted twice at the twisted portion C.

Air is appropriately ejected from the yarn feed nozzle 14b for an appropriate time, and as shown in FIG. 8, the clamp piece 13a is advanced while holding the tip of the switching yarn B, and the base yarn A is clamped between the protruding portion 10a. Further, the cutter 17a is further advanced to cut the base yarn A. After cutting, the cutter 17a is retracted as shown in FIG.

Therefore, as shown in FIG. 9, when compressed air is sent from the port 101a to the yarn feed nozzle 14a and a downstream spiral flow is formed in the yarn feed nozzle 14a from the ejection hole 141a, the base yarn near the outlet of the yarn introduction path 11a is formed. The tip of A is sucked toward the through-hole 12, passes through the nozzle 14 a, turns back onto the twisted portion while twisting with the original yarn A in the nozzles 15 c and 15 a, and reaches the yarn presser 16 near the through-hole 12 outlet. Sent. When compressed air is sent from the port 101f to the yarn feed nozzle 15b and an upstream spiral flow is formed in the yarn feed nozzle 15b from the ejection hole 151b, the tip of the switching yarn B at the location of the yarn presser 16 is directed toward the through-hole 12. Then, it passes through the nozzles 15b and 15d and turns back to the bottom of the twisted portion while being twisted with the switching yarn B in the nozzle 14b, and is sent to the yarn presser 34 near the entrance of the through hole 12. As a result, the original yarn A and the switching B are neatly separated at the twisted portion C without being mixed at the twisted portion. As shown in FIGS. 7C and 9, the ejection hole 151a of the yarn feed nozzle 15a and the ejection hole 151b of the nozzle 15b are spirally formed from the downstream side to the upstream side. This shape forms an upstream spiral flow.

In FIG. 9, the base yarn A is along the nozzles 15 a and 15 c of the rotary shaft 15 with nozzle, and the switching yarn B is along the nozzle 14 b of the fixed shaft 14 with nozzle that is symmetric with respect to the through-hole 12. Therefore, as shown in FIG. 10, the nozzles 15a and 15c through which the base yarn A passes and the nozzle 14b through which the switching yarn B passes are concentric so that the yarn can be smoothly fed as shown in FIG. Then, the positioning stopper 33 is moved away from the indexing detection rod 31b, and the motor 321a is operated to rotate the rotating shaft 15 with the nozzle fixed together with the indexing pulley 31 in the clockwise direction. When the indexing detection bar 31a is disengaged from the indexing sensor 311a, the stopper 33 protrudes, hits the detection bar 31a at a half-rotation position, and when the sensor 311a senses the detection bar 31b, the motor 321a stops. .

As shown in FIG. 11, when the nozzle through which the base thread A and the switching thread B pass is concentric, as shown in FIGS. 3 and 4, the cylinder 16a is operated and the thread presser lever 161a is pushed. The lever 161a rotates with the pin 163a as the base point, and the symmetric thread presser lever 161b rotates in the opposite direction to the lever 161a with the pin 163b as the base point by the meshing portion E. Accordingly, the leading ends of the base yarn A and the base yarn A are clamped together with the thread presser 16 attached to the ends of the levers 161a and 161b as shown in FIG. Further, the cylinders 341a and 341b are operated, and the switching thread B and the tip of the switching thread B are clamped together by the thread retainer 34. Then, as shown in FIGS. 3 and 4, the cylinder 16b is protruded, the levers 161a and 161b are rotated around the shaft 162a, and the thread retainer 16 is lowered to the vicinity of the exit of the through-hole 12. As a result, as shown in FIG. 12, a margin corresponding to the lowering of the thread retainer 16 is generated in the base thread A and the switching thread B clamped between the thread retainer 34 and the thread retainer 16. This margin is a margin necessary for twisting the original yarn A and the switching yarn B.

Therefore, when the compressed air is appropriately sent from the time port 101d to the nozzle 15c generating the spiral flow and the spiral flow is formed in the nozzle 15c generating the spiral flow from the ejection hole 151c, the original yarn A is twisted as shown in FIG. The portion T1 is sufficiently twisted between the twisted portion C and the yarn presser 16. At the same time, the twisted portion T2 of the switching yarn B is sufficiently twisted between the twisted portion C and the yarn presser 34 in the direction opposite to the original yarn side. As shown in FIG. 7B and FIG. 12, the ejection holes 151c of the nozzle 15c and the ejection holes 151d of the nozzle 15c that generate the spiral flow are formed in a spiral shape from upstream to downstream. A spiral flow is formed by this shape. Then, the cylinder 16b shown in FIGS. 3 and 4 is operated to raise the thread presser 16 to the original position, and the cylinder 16a is operated to release the clamp of the main thread A by the thread presser 16. Further, the cylinders 341a and 341b are operated to release the clamp of the switching thread B by the thread retainer 34. As a result, the switching between the yarns A and B is completed, and the switching yarn B is supplied to the knitting machine or the like instead of the base yarn A as shown in FIG.

Further, the operation of the clamp pieces 13a and 13b, the operation of the yarn feed nozzles 14a, 14b, 15a and 15b, the operation of the rotary shaft 15 with nozzle, the operation of the cutters 17a and 17b, the operation of the yarn presser 16, the operation of the yarn presser 34, and the spiral flow There is provided a control device for controlling the operation of the nozzles 15c and 15d that generate the gas in accordance with the above order.

DESCRIPTION OF SYMBOLS 1, 2 Yarn 1a, 2a Yarn end A Original yarn B Switching yarn C Twisting part E Interlocking part T1 Twisting part T2 Twisting part 10 Main body 10a Protrusion part 101a-101f Port 11a-11f Thread introduction path 12 Through port 13a , 13b Clamp piece 14 Fixed shaft 14a with nozzle, 14b Yarn feed nozzle 141a, 141b Rotating shaft 15a with nozzle 15a, 15b Yarn feed nozzle 15c, 15d Nozzles 151a-151d for generating spiral flow Ejection hole 16 Yarn retainer 16a , 16b Cylinder 161a, 161b Thread holding lever 162a Shaft 163a, 163b Pin 17a, 17b Cutter 31 Indexing pulley 31a, 31b Indexing detection rod 311a Indexing sensor 32 Motor pulley 321a Motor 322a Belt 33 Positioning stopper 331a Cylinder 34 Pressing 341a, 341b pistons 342a, 342b spring 343a, 343b port

The present invention relates to a manufacturing method and an apparatus for connecting a yarn when the yarn supplied to a weaving machine or the like is finished and the yarn is switched.

A conventional splicer device for knotless connection sends the tip of the yarn 2 to be connected to the yarn 1 to a certain position, and as shown in FIG. 16, the tip of the yarn 1 and the yarn 2 at that position. At the same time, and the twisted portion is formed by the swirling flow of air until the thread 1 is sufficiently close to the cutting position. (For example, refer to Patent Document 1).

FIG. 17 shows that two spun yarn ends are folded back in a “J” shape, facing each other so that the folded portions are coupled to each other, and the leading ends of the spun yarns are entangled with the proximal end side of the folded portions. , Respectively. (For example, refer to Patent Document 2).

Japanese Patent Laid-Open No. 10-279190 JP 2006-219209 A

However, according to the connection method of FIG. 16, since the colors of the twisted portions are inevitably mixed if the colors of the yarn 1 and the yarn 2 are different, if the twisted portion is shortened as much as possible, the yarn is unwound or the terminal protrudes. There is a problem that the defect appears.

According to the connection method of FIG. 17, the two spun yarns are not securely fixed at the joining position. Therefore, if the entangled portion is shortened, the yarn is easily unwound, and if the entangled portion is lengthened, the entangled portion becomes 1 There are problems such as darker colors compared to book parts.

Therefore, the problem of the present invention is that the original yarn and the switching yarn are not mixed well at the twisted portion, and the defects such as the unraveling of the yarn and the protruding end do not appear, and the strong twisted knot at the short twisted portion. A manufacturing method and an apparatus thereof are provided.

In order to solve the above-mentioned problem, the first invention is to pass the base yarn and the switching yarn through two nozzles, twist the base yarn and the switching yarn twice by means of rotating, and turn the base yarn back from the twisted portion. Cut while leaving the length, twist the main yarn tip with the main yarn while turning back with air flow, twist the switching yarn tip with the switching yarn with air flow and tie the base yarn and switching yarn This is a yarn knot manufacturing method.

The second invention is a step of providing two nozzles on each of the rotating shaft with nozzle and the fixed shaft with nozzle, passing the original yarn and the switching yarn through the two nozzles, and twisting the original yarn and the switching yarn twice. Cutting the base yarn in the vicinity of the nozzle inlet; and twisting the base yarn tip back to the vicinity of the nozzle outlet at the dividing surface of the nozzle-attached rotating shaft and the nozzle-fixed shaft. And a step of twisting the switching yarn tip with the switching yarn while turning back to the vicinity of the nozzle inlet, and a step of penetrating the nozzle hole through which the base yarn and the switching yarn pass by the rotating shaft with nozzle. The yarn knot manufacturing method described in 1.

Third invention is a Motoito tip and Motoito the Yoriawase an air stream, knotting process according to claim 2, wherein the switching thread tip and switching yarns, characterized in that additional step stranding air flow .

The fourth invention includes a step of clamping the switching yarn tip and the switching yarn together by the yarn pressing means near the nozzle inlet before twisting the leading yarn tip and the original yarn, and the switching yarn tip and the switching yarn by airflow , 4. The yarn knot manufacturing method according to claim 3, further comprising a step of clamping the base yarn tip and the base yarn together by the yarn pressing means in the vicinity of the outlet and lowering the base yarn.

The fifth aspect of the invention is a fixed shaft with a nozzle attached in the vicinity of the inlet of the through-hole, and a rotary shaft with a nozzle rotatably attached in the vicinity of the outlet of the through-hole, in a through-hole provided in a substantially central portion of the apparatus body. Two cylindrical yarn feed nozzles attached to the fixed shaft, two cylindrical yarn feed nozzles attached to the rotary shaft, and a base yarn provided on a contact surface between the fixed shaft and the rotary shaft; A twist portion for twisting the switching yarn twice; and an indexing means provided on the rotary shaft; the base yarn is inserted from one yarn feed nozzle of the fixed shaft and is fed to one yarn feed nozzle of the rotary shaft The disconnecting / switching yarn is inserted from the other yarn feeding nozzle of the fixed shaft and is removed from the other yarn feeding nozzle of the rotating shaft.

The sixth aspect of the invention is that the two yarn feed nozzles of the fixed shaft with nozzle have a plurality of spiral air ejection holes directed from the upstream to the downstream of the cylinder, and the two yarn feed nozzles of the rotary shaft with nozzle are: 6. The yarn knot device according to claim 5, further comprising a plurality of spiral air ejection holes directed from the downstream side to the upstream side of the cylinder.

7. The yarn according to claim 5, wherein a nozzle that generates a spiral flow is arranged in each yarn feed nozzle of the rotary shaft with nozzle near the center of the through hole. A knotting device.

The eighth invention is the yarn knot device according to claim 7, wherein the nozzle has a plurality of spiral air ejection holes directed from the upstream side to the downstream side of the cylinder.

9. The yarn knot according to claim 5, wherein the thread presser is provided near the entrance and the exit of the through-hole, and the thread presser near the exit is lowered. Device.

Since this invention is comprised as mentioned above, there exist the following effects.
According to the first aspect of the present invention , the base yarn and the switching yarn are passed through the two nozzles, twisted twice by the means for rotating the base yarn and the switching yarn, and the length for turning back the base yarn from the twisted portion remains. cut Te, Motoito tip twisting while wrapping at Motoito airflow, switching yarn tip twisting while folding the switching yarn and air flow, by connecting the Motoito and switching yarns, said at twisting 2 twists The position is fixed at the portion, it does not become a large lump, the strength is maintained, and the defect that the yarn can be unwound can be reliably prevented. Since the position of the twisted portion is not determined by one-time twisting, the yarn is easily unwound, and the twisted portion becomes a large lump by three-time twisting, so that it is easily caught by the knitting needle during knitting, and yarn breakage is likely to occur. Even spun yarn, spun yarn (Operon (registered trademark) , spandex, nylon, etc.), the original yarn and the switching yarn are neatly separated, and even in a short twisted part, an unprecedented strong yarn knot can be formed and the yarn can be unraveled It is possible to more reliably prevent defects such as protruding terminals. Furthermore, since the yarns are twisted together, 1 to 3 spliced yarns necessary for knitting can be formed.

According to the second aspect of the present invention, two nozzles are provided on each of the rotating shaft with nozzle and the fixed shaft with nozzle, the base yarn and the switching yarn are passed through the two nozzles, and the base yarn and the switching yarn are passed through. Twisting twice, cutting the base yarn in the vicinity of the nozzle entrance, and the base yarn tip turning back to the vicinity of the nozzle exit at the boundary between the rotary shaft with nozzle and the fixed shaft with nozzle A step of twisting with the switching yarn while the tip of the switching yarn is folded back to the vicinity of the nozzle inlet, and by passing through the nozzle hole through which the original yarn and the switching yarn pass by the rotating shaft with the nozzle, Twisting twice allows the position to be fixed at the twisted portion, does not form a large lump, maintains strength, and can reliably prevent defects that can unravel the yarn. Since the position of the twisted portion is not fixed when twisted once, the yarn is easily unwound, and when twisted three times, the twisted portion becomes a large lump, so that it is caught by the knitting needle during knitting, and yarn breakage is likely to occur. By passing through the nozzle hole through which the base yarn and the switching yarn pass, resistance during yarn traveling can be reliably prevented. Even spun yarn, spun yarn (Operon (registered trademark) , spandex, nylon, etc.), the original yarn and the switching yarn are neatly separated, and even in a short twisted part, an unprecedented strong yarn knot can be formed and the yarn can be unraveled It is possible to more reliably prevent defects such as protruding terminals. Furthermore, since the yarns are twisted together, 1 to 3 spliced yarns necessary for knitting can be formed.

According to the invention described in claim 3 , by twisting the base yarn tip and the base yarn with an air flow and twisting the switching yarn tip and the switching yarn with an air flow, the yarn can be unwound or the terminal can be more protrusive. This can be surely prevented, and the thickness of the yarn where the yarn is twisted together can be made uniform, and the twisted portion can be made inconspicuous.

According to the invention described in claim 4, before twisting the main yarn tip and the main yarn, and the switching yarn tip and the switching yarn by air flow , the switching yarn tip and the switching yarn are clamped together by the yarn pressing means near the nozzle inlet. Clamping the lower end of the original yarn and the original yarn together by the yarn holding means near the nozzle outlet and lowering the twisted portion of the original yarn side and the switching yarn side by the amount of the lowering of the yarn holding means. A margin is generated, and twisting can be performed as much as the margin, and even in a short twisted portion, an unprecedented strong yarn knot can be formed, and defects such as unraveling of the yarn and protrusion of the terminal can be more reliably prevented.

According to the fifth aspect of the present invention, a fixed shaft with a nozzle attached in the vicinity of the inlet of the through hole and a rotary shaft in the vicinity of the outlet of the through hole are rotatably attached to a through hole provided in a substantially central portion of the apparatus main body. A rotating shaft with a nozzle, two cylindrical thread feeding nozzles attached to the fixed shaft, two cylindrical thread feeding nozzles attached to the rotating shaft, and a contact surface between the fixed shaft and the rotating shaft. A twist portion for twisting the provided base yarn and the switching yarn twice, and an indexing means provided on the rotary shaft, and the base yarn is inserted from one yarn feed nozzle of the fixed shaft, and one of the rotary shafts Since the switching yarn is inserted from the other yarn feeding nozzle of the fixed shaft and is removed from the other yarn feeding nozzle of the rotating shaft, the spun yarn, the spun yarn (Operon (registered trademark) , spandex, Nylon etc.) Even in a short twisted section, it is possible to form a strong knot that has never been seen before, and more reliably prevent defects such as unraveling of the yarn and protruding ends. Furthermore, since the yarns are twisted together, 1 to 3 spliced yarns necessary for knitting can be formed.

According to the sixth aspect of the present invention, the two yarn feed nozzles of the fixed shaft with nozzle have a plurality of spiral air ejection holes directed from the upstream side to the downstream side of the cylinder, and The yarn feed nozzle has a plurality of spiral air ejection holes that are directed from the downstream to the upstream of the cylinder, so that the tip of the yarn can be reliably attracted to any nozzle, and the original yarn and the switching yarn are twisted twice. After that, the main yarn tip and the main yarn, and the switching yarn tip and the switching yarn are twisted together while turning, so even with spun yarn and spun yarn (Operon (registered trademark) , spandex, nylon, etc.) Even in short and twisted portions, it is possible to form a strong yarn knot as never before, and to more reliably prevent defects such as unraveling of the yarn and protruding ends. Furthermore, since the yarns are twisted together, 1 to 3 spliced yarns necessary for knitting can be formed.

According to the seventh aspect of the present invention, since the nozzle that generates the swirl flow is arranged in each yarn feeding nozzle of the rotating shaft with nozzle near the center of the through-hole, defects such as unraveling the yarn and protruding ends Can be more reliably prevented, and the thickness of the yarn where the yarn is twisted together can be made uniform, and the twisted portion can be made inconspicuous.

According to the invention described in claim 8, since the nozzle has a plurality of spiral air ejection holes directed from the upstream side to the downstream side of the cylinder, defects such as unraveling of the yarn and protrusion of the terminal are more reliably ensured. In addition to preventing this, it is possible to make the thickness of the yarn where the yarn is twisted together with one piece uniform and make the twisted portion inconspicuous.

According to the ninth aspect of the present invention, the yarn pressing means is provided in the vicinity of the inlet and the outlet of the through hole, and the yarn pressing means in the vicinity of the outlet is lowered so that the twisted portion on the original yarn side and the switching yarn side is provided. However, there is an allowance corresponding to the descending amount of the yarn pressing means, and the twist can be tightly made by the allowance, and even in a short twisted portion, an unprecedented strong yarn knot can be formed, the yarn can be unraveled, the end can protrude, etc. Can be more reliably prevented.

Schematic longitudinal front view showing an example of the apparatus of the present invention Plan view of the main part of the detection unit for indexing Schematic longitudinal front view of upper thread retainer Top view of the main part of the upper thread retainer Schematic longitudinal front view showing the operation of the device of the present invention The same figure as above Cross section of fixed shaft with nozzle, nozzle that generates spiral flow of rotating shaft, and yarn feed nozzle Schematic longitudinal front view showing the operation of the device of the present invention The same figure as above The same figure as above The same figure as above The same figure as above The same figure as above The same figure as above Front view showing the thread connection in this device Front view showing a conventional threaded connection Front view showing a conventional threaded connection

Embodiments of the present invention will be described below with reference to FIGS. 1 to 15, but the present invention is not limited to these embodiments as long as the gist of the present invention is not exceeded.

FIG. 1 is a schematic longitudinal sectional front view of a yarn knotting apparatus according to a yarn knotting method in a knitting machine or the like of the present invention. FIG. 2 is a plan view of an essential part of the index detection unit. FIG. 3 is a schematic longitudinal front view of the upper thread presser. FIG. 4 is a plan view of the main part of the upper thread presser. 5 and 6 are schematic longitudinal front views showing the operations of the respective parts of the yarn knotting apparatus according to the yarn knotting method in the knitting machine or the like of the present invention. FIG. 7 is a main part plan view showing the positional relationship between the fixed shaft with nozzle, the rotary shaft with nozzle, the nozzles for generating the spiral flow, and the nozzles that generate the spiral flow. 8 to 14 are schematic longitudinal front views showing the operations of the respective parts of the yarn knotting apparatus according to the yarn knotting method in the knitting machine or the like of the present invention. In addition, the yarn knot device in the knitting machine or the like of the present invention is a splicer device connected to the above-described conventional knotless (knotless), except for the configurations shown in FIGS. 1 to 4 and FIG. Since they are the same, detailed description is omitted and the same reference numerals are used for the same constituent members.

As shown in FIG. 1, a fixed shaft 14 with a nozzle is provided in the vicinity of the inlet of the through-hole 12 provided in the main body 10, and a rotary shaft 15 with a nozzle is disposed in the vicinity of the outlet. A twisted portion C for twisting the base yarn A and the switching yarn B twice is provided near the center of the through hole 12. The twisted portion C is provided on the contact surface between the fixed shaft 14 with nozzle and the rotary shaft 15 with nozzle. Cylindrical thread feed nozzles 14 a and 14 b are provided on the fixed shaft 14 symmetrically with respect to the through-hole 12. As will be described later, the yarn feed nozzles 14a and 14b are air outlets for twisting the tip of the original yarn A cut after twisting twice with the original yarn A while turning back. On the inlet side of the rotary shaft 15, nozzles 15c and 15d for generating a cylindrical spiral flow are provided concentrically with the yarn feed nozzles 14a and 14b. As will be described later, the nozzles 15c and 15d that generate the spiral flow are twisted twice and then twisted while twisting back and twisting the base yarn A and the base yarn A tightly, the tip of the switching yarn B and the switching yarn B It is a nozzle for tightly twisting. On the outlet side of the rotary shaft 15, cylindrical thread feed nozzles 15a and 15b are provided concentrically with the respective thread feed nozzles. As will be described later, the yarn feed nozzles 15a and 15b are air outlets for twisting together the switching yarn B while turning the tip of the switching yarn B after twisting twice. Furthermore, the main body 10 is provided with six ports 101a to 101f that are orthogonal to the vertical center lines of the nozzles 14a, 14b, and 15a to 15d. In FIG. 1, the original yarn A (yarn currently supplied to the knitting machine or the like) passes through the nozzles 14a, 15c and 15a, and the switching yarn is clamped by the clamp piece 13b. Of course, it is possible to arbitrarily select which yarn feed nozzles 14a and 14b attract the base yarn A, and the switching yarn B is attracted to the yarn feed nozzle through which the base yarn A does not pass.

As shown in FIG. 1, a pair of thread pressers 34 that clamp the switching thread and the switching thread tip at the same time are provided near the entrance of the through-hole 12. As shown in FIG. 11, the thread retainer 34 is continuous with the pistons 341a and 341b. When compressed air is introduced into the ports 343a and 343b, the pistons 341a and 341b move toward the center of the main body 10 and are clamped. It is like that. When the compressed air is released, the pistons 341a and 341b are returned to their original positions by the springs 342a and 342b, and the clamp is released. FIG. 1 shows a state in which the clamp is released, and FIG. 11 shows a state in which it is clamped.

As shown in FIGS. 1 and 2, an indexing pulley 31 is rotatably fixed to the rotary shaft 15 with nozzle on the outlet side. The rotating shaft 15 is rotated by transmitting the rotation of the motor pulley 32 attached to the motor 321a to the indexing pulley 31 by the belt 322a. An indexing detection bar 31a is attached to the upper surface of the indexing pulley 31 to detect the rotational speed and stop position by the indexing sensor 311a, and the half-rotation stop position is detected at the half-rotation position. For this purpose, an indexing detection bar 31b is attached. Further, a positioning stopper 33 is provided for positioning the rotary shaft 15 in two or half rotations against the detection rod 31a or 31b. The positioning stopper 33 is projected or retracted by the cylinder 331a. In FIG. 2, since it is rotating, it is retracted.

As shown in FIGS. 3 and 4, a pair of thread pressers 16 that clamp the base yarn A and the tip of the base thread A together are provided near the exit of the through-hole 12. In the thread retainer 16, the thread retainer levers 161a and 161b are rotated about the pins 163a and 163b by a cylinder 16a so as to approach or separate from each other. Further, the cylinder 16b is lowered and raised with the shaft 162a as a base point.

Next, the operation of this apparatus will be described. Assume that the base yarn A is continuously supplied to a knitting machine or the like in the state shown in FIG. The original yarn A passes through the yarn introduction path 11a and passes through the yarn feed nozzle 14a of the fixed shaft 14 with nozzle provided in the through-hole 12, the nozzle 15c that generates a spiral flow of the rotary shaft 15 with nozzle, and the yarn feed nozzle 15a. It is supplied to knitting machines and the like. On the other hand, the switching yarn B passes through the yarn introduction path 11b, and its tip is clamped by the protruding portion 10a near the exit of the yarn introduction path 11b and the clamp piece 13b.

When a yarn switching signal is sent from the knitting machine or the like, the knitting machine or the like is stopped and the supply of the base yarn A is stopped. Then, as shown in FIG. 5, the clamp at the tip of the switching yarn B is released to make it free, and at the same time, compressed air is introduced into the yarn introduction path 11b, air is ejected into the through-hole 12, and simultaneously the yarn feed nozzle from the port 101b. When compressed air is sent to 14b, a spiral flow is formed in the yarn feed nozzle 14b from the ejection hole 141b, and the tip of the switching yarn B near the outlet of the yarn introduction path 11b passes through the through-hole 12, and the yarn feed nozzle Then, the air is sucked in the direction of 14b and further sent to the position of the thread presser 16 along the nozzle 15d and the thread feed nozzle 15b that generate a spiral flow together with the ejected air. The ejection hole 141a of the yarn feed nozzle 14a and the ejection hole 141b of the yarn feed nozzle 14b are formed in a spiral shape from upstream to downstream as shown in FIGS. This shape forms a downstream spiral flow.

As shown in FIG. 6, when the tip of the switching thread B reaches the thread retainer 16, the cylinder 331a of FIG. 2 is operated to move the positioning stopper 33 backward from the indexing detection bar 31b. When the motor 321a is operated and the rotation of the motor pulley 32 is transmitted to the indexing pulley 31 by the belt 322a, the rotating shaft 15 with the nozzle rotates. When the indexing sensor 311a senses the detection rod 31b at the time of one and a half rotations, the stopper 33 protrudes and hits the detection rod 31b at a position of two revolutions, and the sensor 311a senses the indexing detection rod 31a. The motor 321a stops. At that time, air is ejected from the yarn feed nozzle 14b, and the tip of the switching yarn B is kept at the position of the yarn presser 16 near the exit of the through-hole 12. As a result, the base yarn A passing through the nozzles 14a, 15c and 15a and the switching yarn B passing through the nozzles 14b, 15d and 15b are twisted twice at the twisted portion C.

Air is appropriately ejected from the yarn feed nozzle 14b for an appropriate time, and as shown in FIG. 8, the clamp piece 13a is advanced while holding the tip of the switching yarn B, and the base yarn A is clamped between the protruding portion 10a. Further, the cutter 17a is further advanced to cut the base yarn A. After cutting, the cutter 17a is retracted as shown in FIG.

Therefore, as shown in FIG. 9, when compressed air is sent from the port 101a to the yarn feed nozzle 14a and a downstream spiral flow is formed in the yarn feed nozzle 14a from the ejection hole 141a, the base yarn near the outlet of the yarn introduction path 11a is formed. The tip of A is sucked toward the through-hole 12, passes through the nozzle 14 a, turns back onto the twisted portion while twisting with the original yarn A in the nozzles 15 c and 15 a, and reaches the yarn presser 16 near the through-hole 12 outlet. Sent. When compressed air is sent from the port 101f to the yarn feed nozzle 15b and an upstream spiral flow is formed in the yarn feed nozzle 15b from the ejection hole 151b, the tip of the switching yarn B at the location of the yarn presser 16 is directed toward the through-hole 12. Then, it passes through the nozzles 15b and 15d and turns back to the bottom of the twisted portion while being twisted with the switching yarn B in the nozzle 14b, and is sent to the yarn presser 34 near the entrance of the through hole 12. As a result, the base yarn A and the switching B are twisted twice at the twisted portion C. As shown in FIGS. 7C and 9, the ejection hole 151a of the yarn feed nozzle 15a and the ejection hole 151b of the nozzle 15b are spirally formed from the downstream side to the upstream side. This shape forms an upstream spiral flow.

In FIG. 9, the base yarn A is along the nozzles 15 a and 15 c of the rotary shaft 15 with nozzle, and the switching yarn B is along the nozzle 14 b of the fixed shaft 14 with nozzle that is symmetric with respect to the through-hole 12. Therefore, as shown in FIG. 10, the nozzles 15a and 15c through which the base yarn A passes and the nozzle 14b through which the switching yarn B passes are concentric so that the yarn can be smoothly fed as shown in FIG. Then, the positioning stopper 33 is moved away from the indexing detection rod 31b, and the motor 321a is operated to rotate the rotating shaft 15 with the nozzle fixed together with the indexing pulley 31 in the clockwise direction. When the indexing detection bar 31a is disengaged from the indexing sensor 311a, the stopper 33 protrudes, hits the detection bar 31a at a half-rotation position, and when the sensor 311a senses the detection bar 31b, the motor 321a stops. .

As shown in FIG. 11, when the nozzle through which the base thread A and the switching thread B pass is concentric, as shown in FIGS. 3 and 4, the cylinder 16a is operated and the thread presser lever 161a is pushed. The lever 161a rotates with the pin 163a as the base point, and the symmetric thread presser lever 161b rotates in the opposite direction to the lever 161a with the pin 163b as the base point by the meshing portion E. Accordingly, the leading ends of the base yarn A and the base yarn A are clamped together with the thread presser 16 attached to the ends of the levers 161a and 161b as shown in FIG. Further, the cylinders 341a and 341b are operated, and the switching thread B and the tip of the switching thread B are clamped together by the thread retainer 34. Then, as shown in FIGS. 3 and 4, the cylinder 16b is protruded, the levers 161a and 161b are rotated around the shaft 162a, and the thread retainer 16 is lowered to the vicinity of the exit of the through-hole 12. As a result, as shown in FIG. 12, a margin corresponding to the descending amount of the thread retainer 16 is generated in the original thread A and the switching thread B clamped between the thread retainer 34 and the thread retainer 16. This margin is a margin necessary for twisting the original yarn A and the switching yarn B.

Therefore, when the compressed air is appropriately sent from the time port 101d to the nozzle 15c generating the spiral flow and the spiral flow is formed in the nozzle 15c generating the spiral flow from the ejection hole 151c, the original yarn A is twisted as shown in FIG. The portion T1 is sufficiently twisted between the twisted portion C and the yarn presser 16. At the same time, the twisted portion T2 of the switching yarn B is sufficiently twisted between the twisted portion C and the yarn presser 34 in the direction opposite to the original yarn side. As shown in FIG. 7B and FIG. 12, the ejection holes 151c of the nozzle 15c and the ejection holes 151d of the nozzle 15c that generate the spiral flow are formed in a spiral shape from upstream to downstream. A spiral flow is formed by this shape. Then, the cylinder 16b shown in FIGS. 3 and 4 is operated to raise the thread presser 16 to the original position, and the cylinder 16a is operated to release the clamp of the main thread A by the thread presser 16. Further, the cylinders 341a and 341b are operated to release the clamp of the switching thread B by the thread retainer 34. As a result, the switching between the yarns A and B is completed, and the switching yarn B is supplied to the knitting machine or the like instead of the base yarn A as shown in FIG.

Further, the operation of the clamp pieces 13a and 13b, the operation of the yarn feed nozzles 14a, 14b, 15a and 15b, the operation of the rotary shaft 15 with nozzle, the operation of the cutters 17a and 17b, the operation of the yarn presser 16, the operation of the yarn presser 34, and the spiral flow There is provided a control device for controlling the operation of the nozzles 15c and 15d that generate the gas in accordance with the above order.

DESCRIPTION OF SYMBOLS 1, 2 Yarn 1a, 2a Yarn end A Original yarn B Switching yarn C Twisting part E Interlocking part T1 Twisting part T2 Twisting part 10 Main body 10a Protrusion part 101a-101f Port 11a-11f Thread introduction path 12 Through port 13a , 13b Clamp piece 14 Fixed shafts 14a, 14b with nozzles Yarn feed nozzles 141a, 141b Ejection holes 15 Revolving shafts 15a, 15b with nozzles Yarn feed nozzles 15c, 15d Nozzles 151a-151d for generating spiral flow Ejection holes 16 Yarn retainer 16a , 16b Cylinder 161a, 161b Thread holding lever 162a Shaft 163a, 163b Pin 17a, 17b Cutter 31 Indexing pulley 31a, 31b Indexing detection rod 311a Indexing sensor 32 Motor pulley 321a Motor 322a Belt 33 Positioning stopper 331a Cylinder 34 Pressing 341a, 341b pistons 342a, 342b spring 343a, 343b port

Claims (9)

  Twist the parallel main yarn and the switching yarn twice, cut the main yarn leaving the length that turns back from the twisted portion, twist the main yarn tip back while folding back with the main yarn, and turn the switching yarn tip back with the switching yarn A yarn knot manufacturing method characterized by twisting, tying a base yarn and a switching yarn.   Two nozzles are provided in each of the moving means and the fixing means, the process of passing the base yarn and the switching yarn through the two nozzles and twisting the base yarn and the switching yarn twice, and the base yarn near the nozzle inlet A step of cutting at the dividing surface of the moving means and the fixing means, a step of turning the front end of the original yarn around the nozzle exit while twisting with the main yarn, and a front end of the switching yarn twisting the switching yarn while twisting the switching yarn The yarn knot manufacturing method according to claim 1, wherein the method includes a step of turning back to the vicinity of a nozzle inlet, and a step of causing the moving means to pass through a nozzle hole through which a base yarn and a switching yarn pass.   3. The method for producing a yarn knot according to claim 2, further comprising the step of tightly twisting the leading end of the base yarn and the base yarn and tightly twisting the leading end of the switching yarn and the switching yarn.   Before the main yarn tip and the main yarn, and the switching yarn tip and the switching yarn are tightly twisted together, a process of clamping the switching yarn tip and the switching yarn together by the thread holding means near the nozzle inlet, and the original yarn tip near the nozzle outlet 4. The method for manufacturing a yarn knot according to claim 3, further comprising a step of clamping and lowering the original yarn together by a yarn pressing means.   A fixed shaft with a nozzle attached to the through hole provided in the substantially central part of the apparatus main body, a rotary shaft with a nozzle attached to the vicinity of the through hole outlet, and a rotary shaft with a nozzle rotatably attached to the fixed shaft. The two cylindrical yarn feed nozzles formed, the two cylindrical yarn feed nozzles attached to the rotating shaft, the base yarn provided on the contact surface of the fixed shaft and the rotating shaft, and the switching yarn are twisted together. A twist portion and indexing means provided on the rotary shaft, the original yarn is inserted from one yarn feed nozzle of the fixed shaft and is pulled out to one yarn feed nozzle of the rotary shaft, and the switching yarn is fixed A yarn knotting device, wherein the yarn knotting device is inserted from the other yarn feed nozzle of the shaft and is removed from the other yarn feed nozzle of the rotating shaft. The two yarn feed nozzles of the fixed shaft with nozzle have a plurality of spiral air ejection holes directed from the upstream to the downstream of the cylinder, and the two yarn feed nozzles of the rotary shaft with nozzle are upstream from the downstream of the cylinder. The yarn knotting device according to claim 5, comprising a plurality of spiral air ejection holes directed in the direction. The yarn knotting device according to any one of claims 5 and 6, wherein a nozzle that generates a spiral flow is disposed in each yarn feed nozzle of the rotary shaft with nozzle in the vicinity of the center of the through hole. The yarn knotting device according to claim 7, wherein the nozzle has a plurality of spiral air ejection holes directed from the upstream side to the downstream side of the cylinder. The yarn knotting device according to any one of claims 5 to 8, wherein a yarn presser means is provided in the vicinity of the inlet and the outlet of the through-hole, and the yarn presser means in the vicinity of the outlet is lowered.

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