KR101331016B1 - Yarn splicing method and yarn splicing device - Google Patents

Abstract

The invention relates to a piecing method capable of securing the strength of a spun yarn obtained by the piecing, and omitting a protrusion treatment step for a fabric knitted by the spun yarn obtained by the piecing. Tip end portions (21a, 22a) of knitting yarns (21, 22) are overlaid in the same direction, and the knitting yarn (21, 22) are intertwined into each other to form a protruding portion (23) and a plurality of branched portions (51, 52) that are branched from the protruding portion (23). Then, the protruding portion (23) is overlaid on one branched portion (51) and the protruding portion (23) is fixed to the one branched portion (51).

Description

YARN SPLICING METHOD AND YARN SPLICING DEVICE

The present invention relates to a thread jointing method and a thread jointing apparatus for threading a plurality of spun yarns.

The spun yarn used to knit a knitted fabric may be broken during knitting when excessive tension is applied. In this case, the yarns are broken and new yarns are piled up to resume the knitting. Thread joints are not only used to recover broken yarns, but also when knitting knitted fabrics having an intarsia pattern with a knitting yarn which is a kind of yarn (for example, Japanese Patent Laid-Open Publication No. See 6-2250).

In the first prior art thread joining method, two ends of a spun yarn are connected by a knotter screw to form a knot, and two spun yarn is spun. In this case, the tip side portion of each spun yarn protrudes from the knot. The tip side of each yarn can be cut short after forming a knot, but not completely removed.

The second conventional thread jointing method is a method of threading a spun yarn without forming a knot by a splicer apparatus. In this thread jointing method, the ends of the two strands of yarn are laid out in a direction opposite to each other and compressed air is blown to entangle the ends of the two strands of yarn. By this thread jointing method, the thread jointing area of the spun yarn is formed in an "I" shape in appearance (for example, see Japanese Patent Application Laid-Open No. 60-39767).

Fig. 13 is a diagram showing a spun yarn obtained by the third joint method of the prior art. In the third conventional thread jointing method, the end portions 1a and 2a of the yarns 1 and 2 are arranged in the same direction in the same direction, and the compressed air is blown to thereby end portions 1a and 2a of the yarns 1 and 2. ) Is threaded by forming the entangled part (4) is entangled. By this thread joint method, the thread joint area | region 3 of the yarns 1 and 2 is formed in an "T" shape from an external appearance (for example, refer Unexamined-Japanese-Patent No. 2004-27463).

In the first conventional thread jointing method, the knot formed in the spun yarn that becomes the thread joint becomes a diameter several times the outer diameter of the spun yarn. Therefore, if this knot goes out to the face stitch side of the knitted fabric, the appearance of the knitted fabric is damaged. In order not to damage the appearance, a extrusion treatment step is required in which the knot is inserted into the inside of the knitted fabric.

In the second conventional thread jointing method, the two yarns are entangled and entangled in opposite directions to each other, whereby the portions not overlapping the yarns are twisted more and the outer diameter thereof becomes smaller, resulting in a higher strength of the yarn obtained. There may be insufficient. Therefore, the yarn which can thread join is limited. For example, when yarns composed of two-ply twisted yarns and chemical fibers are used as yarns for yarn joining, the yarn joint region of the yarns may be broken during knitting.

In the third conventional thread jointing method, since the thread joint region 3 of the yarn of the yarn is arranged in a "T" shape, the entangled portion 4 in which the end portions 1a and 1b of both threads 1 and 2 are entangled is , It projects outward with respect to the rest of the threaded region 3. This entangled part 4 damages the external appearance of a knitted fabric when it goes out to the face stitch side of a knitted fabric. In order not to impair the appearance, a knot treatment step of inserting the entanglement 4 into the inside of the knitted fabric is required in order to arrange the entangled portion 4 on the back stitch side of the knitted fabric. This problem also occurs in the case of using a threaded spun yarn for knitting fabric fabrics in addition to using knitting fabrics.

An object of the present invention is to provide a thread joint method and a thread joint apparatus capable of omitting the knot treatment step after thread joint while securing the strength of the spun yarn obtained by thread joint.

The present invention is a thread joint method for joining ends of a plurality of spun yarn,

A plurality of spun yarns connected to each other, the connecting portion which is separated from each other in the direction from the distal end of the plurality of spun yarns towards the proximal end, the connecting portion extending from the connecting portion to the distal end of each spun yarn, and the proximal end of the plurality of spun yarns at the connecting portion A spun yarn connecting process of forming a plurality of branches each extending in each spun yarn;

A projection part fixing step of overlapping the projection part along at least one branch part of the plurality of branch parts, and fixing the branch part overlapped with the projection part and the projection part ,
In the spinning yarn connecting step, a plurality of yarns are entangled to connect the separating parts of the yarns to each other.

Moreover, in this invention, in the said projection part fixing process, it is preferable that the branch part to which the said projection part is fixed is a branch part arrange | positioned at the yarn-feeding direction upstream side by which the yarns are suddenly conveyed with respect to a connection part.

In the present invention, in the step of fixing the protrusions, it is preferable to partially twist each of the protrusions and the branch, and then fix the protrusions to entangle each other to fix the protrusions to the branch.

Moreover, in this invention, in the said processus | protrusion part fixing process, it is preferable to rotate a processus | protrusion centering on the axis line of a branch part, and to wind a processus | protrusion part to a branch part, and to fix a projection part to a branch part.

Moreover, in this invention, it is preferable to wind a projection part in a branch part in the state which prevented the branch part from turning with a projection part in the said projection part fixing process.

In the present invention, in the step of fixing the projection, it is preferable to spray the pressurized fluid in the direction toward the projection toward the branch to be fixed and to fix the projection and the branch.

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In addition, the present invention is a spun yarn threaded by the thread joint method.

Moreover, this invention is the knitted fabric which knits by the knitting yarn threaded by the said thread joining method.

Moreover, this invention is a thread connection apparatus for joining the edge part of several yarns,

A plurality of spun yarns connected to each other, the connecting portion which is separated from each other in the direction from the distal end of the plurality of spun yarns towards the proximal end, the connecting portion extending from the connecting portion to the distal end of each spun yarn, and the proximal end of the plurality of spun yarns at the connecting portion Spun yarn connecting means for forming a plurality of branch portions extending in each spun yarn, respectively;

The projection part is superimposed along at least one branch part of a plurality of branch parts, and provided with projection part fixing means which fixes the branch part which overlaps the said projection part and the said projection part ,
The spun yarn connecting means is a thread-joining device, characterized in that the plurality of spun yarns are entangled to connect the plurality of spun yarns to each other.

Moreover, in this invention, it is preferable that a projection part fixing means fixes a projection part to the branch part arrange | positioned at the yarn-feeding direction upstream side by which the yarns are suddenly conveyed with respect to a connection part.

In the present invention, the projection fixing means, after partially untwisting the projection and the branch portion, turning the projection portion around the axis of the entanglement or branching portion to entangle the twisted portion with each other to wind the projection portion in the branch portion. It is preferable to fix the projection part and the branch part by any one of the winding methods.

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In addition, in the present invention, the yarn connecting means includes a first splice head for connecting a plurality of yarns by spraying a pressurized fluid to the portion of the plurality of yarns are superimposed, the projection fixing means, the compression fluid is It is preferable to include a second splice head which is sprayed on the projection to fix the projection and the branch.

The objects, features and advantages of the present invention will become more apparent from the following detailed description and drawings.

1A to 1D are front views of knitting yarns for illustrating the procedure of the thread joint method according to the first embodiment of the present invention.

2 is a diagram illustrating a flat knitting machine 31 including a thread joint device 30.

FIG. 3 is an enlarged perspective view showing each splice head 33, 34 included in the thread joint device 30 in an enlarged manner.

4 is a flowchart showing the procedure of the protrusion fixing step of the thread joint device 30.

5 is a flowchart showing the procedure of the projection fixing step.

6A to 6D are diagrams showing the operation of the thread joint device 30 in each step of the protrusion fixing step.

7A and 7B are perspective views showing a second splice head 34 for explaining the thread joint method according to the second embodiment of the present invention.

FIG. 8 is a cross-sectional view taken along the line S8-S8 of FIG. 7A.

FIG. 9 is a cross-sectional view taken along the section S9-S9 of FIG. 8. FIG.

10A and 10B are views schematically showing a thread joint apparatus 30A implementing the thread joint method of the second embodiment.

Fig. 11 is a front view showing a knitting yarn 24B connected by a yarn knitting process as a third embodiment of the present invention.

12A to 12D are front views each showing a state where the protrusions 23a and 23b are fixed.

Fig. 13 is a diagram showing a spun yarn obtained by the third joint method of the conventional art.

Hereinafter, one suitable embodiment of the present invention will be described in detail with reference to the drawings.

1A to 1D are front views of knitting yarns for explaining the procedure of the thread joint method according to the first embodiment of the present invention. The actual joint sequence proceeds in the order of FIGS. 1A to 1D. The thread joint method is a method for thread-bonding two strands of knitting yarns 21 and 22. The thread joining method is used, for example, when the knitting yarn of a color different from the knitting yarn in knitting is threaded to the knitting yarn in knitting. In addition, a thread joint method is used also when threading a new knitting yarn to a broken knitting yarn. In this embodiment, a method of threading two strands of knitting yarns 21 and 22 will be described.

In the thread joint method according to the first embodiment of the present invention, first, two strands of yarn 21 and 22, which are spun yarns, are prepared (FIG. 1A). Next, the tip ends 21a and 22a of the knitting yarns 21 and 22 are superposed and arranged in the same direction. In the present invention, "facing the same direction" means that the end faces of the tip portions 21a and 22a of the knitting yarns 21 and 22 face the same direction. Each knitting yarn 21 and 22 is separated from the tip portions 21a and 22a at positions separated by a predetermined protrusion amount H1 in the direction toward the base ends 21d and 22d. , 22c) is set. In the state in which the knitting yarns 21 and 22 are folded, at least each knitting yarns 21 and 22 are at the tip overlapping portions 21e and 22e which become a part from the tip portions 21a and 22a to the separating portions 21c and 22c. And overlap each other in the same direction (Fig. 1B).

After arranging them, the twist of the tip overlapping portions 21e and 22e of the two strands of knitting 21 and 22 is released. Next, the tip overlap portions 21e and 22e which have been twisted are entangled with each other, and the tip overlap portions 21e and 22e of the two strand knitting yarns 21 and 22 are integrally connected (FIG. 1C). Thereby, the knitting yarns 24 after the two strands of knitting yarns 21 and 22 are connected to each other are formed. After the connection, the knitting yarn 24 is connected to each other at the separating portions 21c and 22c of the knitting yarns 21 and 22 before the connection, and the knitting yarns 21 and 22 before the connection from the connecting portion 50. The projections 23 extending to the tip ends 21a and 22a of the two-branch branches 51 and 52 respectively extending from the connecting part 50 toward the base ends 21d and 22d of the knitting yarns 21 and 22 before connection. ) Is formed. Each branch 51 and 52 corresponds to the remaining portions except for the tip overlapping portions 21e and 22e of the knitting yarns 21 and 22 before the thread joint. Moreover, the branching parts 51 and 52 branch into two branches from the connection part 50 as a starting point. In this way, a process of connecting the two strands of yarn 21 and 22 at the tip overlapping portions 21e and 22e to form the yarn 24 after connection is a spun yarn connection process.

Next, the protrusions 23 are bent to stack the protrusions 23 along one of the two branching portions 51 and 52 along the one branching portion 51. In this state, the part which the protrusion part 23 and the one branch part 51 overlap is partially unwound. Next, the twisted portions are entangled with each other so that the protrusions 23 follow one branch 51 and are folded and fixed (FIG. 1D). The process of arranging and fixing the protrusion 23 to the at least one branch 51 corresponds to the protrusion fixing process. Since the front end portion 23a of the protrusion 23 is fixed to the branching portion 51 in the knitting yarn 25 after the threading connection, the protrusion amount H2 protrudes from the branching portion 51. Can be made smaller than the protrusion amount H1 before the protrusion is fixed (H2 < H1). For example, the protrusion amount H1 before fixing the protrusion is 15 mm, whereas the protrusion amount H2 after fixing the protrusion is 1 mm. However, the above-described protrusion amounts H1 and H2 are greatly changed by yarn fitting conditions such as the type of yarn, the number of yarn to be threaded, the amount of compressed air blowout, and the like.

Fig. 2 is a diagram showing a flat knitting machine 31 having a thread fitting device 30 which is one embodiment of the present invention. 3 is an enlarged perspective view showing each splice head 33 and 34 included in the thread fitting device 30. In Fig. 3, the vertical direction means the vertical direction with respect to the drawings. The downward direction is a direction from the upstream side of the steeping direction to the downstream side of the steeping direction. The thread joint method described above is achieved by the thread joint apparatus 30 according to the present embodiment. The thread joint device 30 is provided in the flat knitting machine 31 which knits a knit fabric as an air splicer. In the present embodiment, two strands of knitting yarns are yarns in use used for knitting and other yarns to be threaded against the yarns in use. The other knitting yarn is appropriately selected from a plurality of knitting yarns.

The thread coupling device 30 includes a first splice head 33 and a second splice head 34. Each splice head (33, 34), by injecting a compression fluid to the two overlapping yarns overlapping each other to untie and entangle each other in the overlapping portion by connecting the two overlapping yarns integrally connected do.

The first splice head 33 is a yarn yarn connecting means for connecting the two yarn knitting yarns 21 and 22 to each other by performing the yarn knitting process described above. The first splice head 33 defines a cylindrical first splice space 60 in which an axis L1 extends in one horizontal direction X1 (hereinafter referred to as "X1 direction"). Groove 33a is formed. A first nozzle hole 33b for supplying compressed air to the first splice space 60 is formed in the first groove portion 33a. Moreover, the 1st groove part 33a opens in the upper direction X2 (henceforth "X2 direction") from the one end to the other end in the X1 direction. This opening part 33c forms the triangular prism-shaped 1st entrance space 61 which becomes wider as it moves away from the 1st groove part 33a to X2 direction.

The second splice head 34 is a protrusion fixing means for fixing the protrusion 23 and the branch 51 by performing the above-described protrusion fixing process. The second splice head 34 is formed with a second groove portion 34a defining a cylindrical second splice space 62 extending in the vertical direction. A second nozzle hole 34b for supplying compressed air to the second splice space 62 is formed in the second groove portion 34a. Moreover, the 2nd groove part 34a opens in another horizontal direction X3 (henceforth "X3 direction") from one end to another end in an up-down direction. The opening 34c forms a triangular prism-shaped second entrance space 63 that gradually widens as it moves away from the second groove 34a in the X3 direction. In addition, the second nozzle hole 34b extends downward as the second nozzle hole 34b moves away from the second splice space 62 in the horizontal direction. In this embodiment, the axis line L2 of the second splice space 62 and the axis line L3 of the second nozzle hole 34b are formed so that the relative angle θ is 30 degrees. The second nozzle hole 34b runs in a direction perpendicular to the feeding direction B toward the center of the second splice space 62 from the nozzle opening, and is opposite to the feeding direction B. As shown in FIG. In other words, the compressed air is blown out in the inclined direction A that proceeds upward. The inclination direction A and the axis L2 of the second splice space 62 are arranged on the same plane.

The flat knitting machine 31 provided with the thread fitting apparatus 30 is disclosed by Unexamined-Japanese-Patent No. 2006-118059, for example. As shown in Fig. 2, the flat knitting machine 31 includes a plurality of yarn feeders 37 for feeding yarn knitting yarn 41, which is thread-joined by the thread joint device 30, to the knitting needle. The flat knitting machine 31 can selectively switch the knitting yarn 41 supplied to the knitting needle by switching the yarn feeder 37 linked to the carriage 36. However, since there is a limit to the number of yarn feeders 37 that can be used, the kind of knitting yarn 41 that can be used is limited. By changing the type of the knitting yarn 41 by the thread joint device 30, the kind of the knitting yarn 41 which can be steeped in the yarn feeder 37 can be increased.

Quantitative transfer of the knitting yarn 41 in order to suppress the sudden change in the tension acting on the knitting yarn 41 between the thread coupling device 30 and the yarn feeder 37 in the sudden yarn path of the knitting yarn 41. An apparatus 38 is provided. The flat knitting machine 31 also includes a control unit 39 and a counter unit 40. The control section 39 calculates in advance the knitting length necessary for knitting the knitted fabric, for example, the length of the knitting yarn necessary for knitting one row in the course direction, provided that there is little variation in the tension acting on the knitting yarn. . Moreover, the control part 39 detects the position of the carriage 36 from the position sensor provided in the carriage 36. The control unit 39 calculates the timing of threading the knitting yarn 41 based on the position of the carriage 36 and the knitting length calculated. The control unit 39 causes the real joint device 30 to make a real joint based on the calculation result. In addition, the control part 39 controls to slow down the speed of the knitting feeder 38 when compared to the case where the thread joint is not performed. In addition, the counter 40 counts time and gives a time measurement result to the controller 39.

4 is a flowchart showing the procedure of the real seam processing of the real seam device 30. 5 is a flowchart showing the procedure of the projection fixing step. 6A to 6D are diagrams showing the operation of the thread joint device 30 in each step of the protrusion fixing step. 6A to 6D, the yarn steeping yarn direction B is set downward. In this embodiment, the threaded joint is used for supplying knitting yarns of different properties from one yarn feeder 37, for example, in intersha knitting.

The control unit 39 is a knitting yarn from the currently knitting stitch to the position where the color pattern is switched, and the knitting yarn from the first splice head 33 to the knitting needle for knitting the color pattern switching position. If it is judged that the lengths of the paths match, the flow advances to step s1 to cause the thread joint apparatus 30 to start thread joint.

In step s1, which is a spun yarn connecting step, the two strands of knitting yarns 21 and 22 are connected by the same method as that of the thread joint apparatus disclosed in, for example, Japanese Patent Laid-Open No. 2005-314104. Specifically, the tip overlapping portions 21e and 22e of the two strands of knitting 21 and 22 before the connection are guided by the guide member from the first entrance space 61 to the first splice space 60. At this time, in one knitting 21, the remaining portion 21f except the tip overlapping portion 21e extends upward from the first splice space 60. In the other knitting yarn 22, the remaining portion 22f except the tip overlapping portion 22e extends downward from the first splice space 60 and is inserted into the second splice space 62. In this state, the vicinity of the separating parts 21c and 22c of each knitting yarn 21 and 22 is clamped by a clamp mechanism, and the vicinity of the tip parts 21a and 22a of each knitting yarn 21 and 22 is cut | disconnected by a cutter. The tip overlapping portions 21e and 22e of the two strand knitting yarns 21 and 22 are inserted into the first groove portion 33a so as to overlap along the X1 direction (Fig. 6A).

Next, the thread joint device 30 ejects compressed air from the first nozzle hole 33b into the first splice space 60 so that the tip overlap portions 21e and 22e of the knitting yarns 21 and 22 are mutually different. Start to entangle. When the first predetermined time t1 elapses after the start of the compressed air is started, the compressed air is stopped. The first setting time t1 is, for example, 100 msec. The first setting time t1 is set to a time at which the appearance of the tip overlapping portions 21e and 22e does not become excessively small. Thus, the knitting yarns 24 having the projections 23 are formed by entangled and integrated the tip overlapping portions 21e and 22e of the two strands of knitting yarns 21 and 22. When the blowing of compressed air is stopped, the clamp is released to release the knitting yarn 24 after the connection and the feeding of the knitting yarn 24 is resumed. Thereby, the spinning yarn connecting process is completed, and the flow proceeds to step S2.

In step s2, which is a protrusion fixing step, the sequence of s21 to s25 in FIG. 5 is performed in sequence. First, in step s21, when it is determined that the spinning yarn connecting step is finished, the counter unit 40 starts counting and proceeds to step s22. In step s22, the fixed rate feeder 38 sends the connected knitting yarn 24 in the yarn feeding direction B, and controls whether or not the count by the counter unit 40 has passed the second set time t2. (39) determines.

Since the knitting yarn 24 after the connection is sent in the steeping yarn direction B, the protrusions 23 escape from the first splice space 60. As a result, the knitting yarn 24 has two branch portions 51 and 52 extending in the vertical direction, and the protrusions 23 protrude in the X1 direction (Fig. 6B). At this time, one branch part 51 extends upward and the other branch part 52 extends downward from the connection part 50 as a starting point. The other branch 52 is fitted into the second groove 34a.

By driving the fixed quantity transfer device 38 and sending the knitting yarn 24 in the steeping direction B, the projection 23 is fitted into the second groove 34a. By the opening part 34d on the upper side of the second groove part 34a, the protrusion 23 is folded toward the opening part 34d on the upper side from the opening part 34e on the lower side of the second groove part 34a. As a result, the protruding portion 23 is superposed along one branch portion 51 which becomes the upstream side in the steeping direction from the bottom portion to the tip portion 23a (Fig. 6C). Thus, the time from the protrusion 23 and the one branched part 51 to the second groove 34a after exiting from the first groove 33a is the second predetermined time t2. The second setting time t2 is, for example, 100 msec. If the control section 39 determines that the second set time t2 has not elapsed, the process returns to step s22 to repeat the determination, and if it determines that the second set time t2 has elapsed, the process proceeds to step s23.

In step s23, the compressed air is ejected from the second nozzle hole 32b to the second splice space 62. Thereby, the projection part 23 and the one branch part 51 which are fitted in the 2nd groove part 34a begin to partially intertwine. Specifically, the compressed air injected from the second nozzle hole 32b proceeds in the inclined direction A. As shown in FIG. By injecting compressed air in the inclined direction A in this manner, the protrusions 23 are folded toward one of the branch portions 51, and are easily entangled with each other. When the compressed air is blown out, the flow proceeds to step s24.

In step s24, it is determined whether or not the count of the counter unit 40 has elapsed since the third set time t3 has started since the blowing of the compressed air to the second splice space 62 begins. The third set time t3 is two branched portions 51 while securing the strength of the knitting yarn 25 after the yarn joint obtained by entangled the projections 23 and one branched portion 51 from the start of ejection. , 52) is the time until the bonding strength can be secured. When the time for exposing the knitting yarn 24 after the connection to the air flow is long, the bonding strength increases, but the outer diameter near the seam of the knitting yarn 24 after the connection is thinned, and the strength of the knitting yarn itself becomes weak. On the contrary, when the time for exposing the knitting yarn 24 after the connection to the air stream is short, the bonding strength becomes weak. In consideration of such a situation, the third set time t3 is determined. The third setting time t3 is 100 msec, for example. If it is determined that the third set time t3 has not elapsed, the process returns to step s24 and the determination is repeated. If it is determined that the third set time t3 has elapsed, the process proceeds to step 25.

In step s25, the supply of compressed air to the second splice space 62 is stopped and the projection fixing step is completed. Thus, by the 2nd splice head 34, the projection part 23 can form the knitting yarn 25 integrated in the state which superimposed on one branch part 51 from the base part to the tip part 23a. . When the projection fixing step is completed, the knitting yarn 25 in which the projection 23 and the branch 51 are integrated is separated from the second groove 34a by the guide member toward the second entrance space 63 in the X3 direction. And pass through the opening part 34c.

In this way, the knitting yarns 25 and 41 obtained by threaded yarns are suddenly fed to the knitting needle by the yarn feeder 37, and the knitted fabric is knitted. Thereby, the knitting fabrics having different color patterns can be knitted by the knitting yarns 25 and 41 supplied from one yarn feeder 37. In addition, by switching the type of knitting yarn guided to the yarn feeder 37 by the thread coupling device 30, the type of knitting yarn 41 that the yarn feeder 37 can steep can be increased.

According to the thread jointing method of the present embodiment as described above, in the spinning yarn connecting step, by connecting the respective knitting yarns 21 and 22 in the separating portions 21c and 22c, It is possible to prevent the outer diameter from decreasing and to secure the strength of the knitting yarn to be threaded. In the protrusion fixing step, the protrusion amount H2 of the protrusion 23 against the branching portions 51 and 52 can be reduced by installing and fixing the protrusion 23 along one of the branching portions 51. In this way, the knitting yarn 25 after thread connection can be manufactured which does not damage an external appearance, while ensuring strength.

If the knitted fabric is knitted using the knitting yarn 25 after the thread joint, the protrusion 23 is prevented from protruding outward from the face stitch of the knitted fabric. Therefore, the operation of checking the protrusion 23 projecting outward from the face stitch of the knitted fabric and the projecting of the projected protrusion 23 into the knitted fabric can be omitted, and the knot processing process after the thread joint is omitted. The process can provide a knitted fabric which does not impair the appearance. Moreover, the touch of the knitted fabric can be made uniform by preventing the protrusion of the protrusion 23. Moreover, according to the thread joint apparatus 30 of this embodiment, the thread joint method which can achieve the above operation | movement and an effect can be implement | achieved.

In addition, in this embodiment, the branch part 51 to which the protrusion part 23 is fixed is a branch part arrange | positioned with respect to the connection part 50 upstream. As a result, when the tip 23a of the protrusion 23 is disposed on the downstream side of the steeping direction B with respect to the connecting portion 50, the resistance of the thread feed at the time of suddenly feeding the knitting yarn 25 after the thread joint is reduced. The yarn feed to the yarn feeder 37 can be made smooth.

In the projection fixing step, compressed air is injected in the inclined direction A with respect to the direction in which the knitting yarn 24 after connection is extended. In addition, after each of the protrusions 23 and the branch portions 51 are partially twisted, the untwisted portions are entangled with each other to fix the protrusions 23 to the branch portions 51. As a result, excessive twisting of the protrusions 23 and one of the branching portions 51 can be prevented, and a part of the outer diameter of the knitting yarn 25 after thread joining can be extremely tapered to prevent the strength from decreasing. Compressed air is injected in the direction which the projection part 23 faces toward the branch part 51 to fix. Thereby, the projection part 23 can be folded toward the branch part 51 to be fixed, and can entangle and fix the projection part 23 to the branch part 51 more reliably.

7A and 7B are perspective views showing a second splice head 34 for explaining the thread joint method according to the second embodiment of the present invention. FIG. 8 is a cross-sectional view taken along the line S8-S8 of FIG. 7A. FIG. 9 is a cross-sectional view taken along the section S9-S9 of FIG. 8. FIG. 10A and 10B are views schematically showing a thread joint apparatus 30A implementing the thread joint method of the second embodiment. In the second embodiment, the same configuration as in the first embodiment is provided except that the compressed air ejecting direction is different from that of the first embodiment in the projection fixing step, and the description of the same configuration is omitted.

The second splice head 34 rotates about the axis L2 of the second splice space 62 while the protrusion 23 is fitted into the second groove 34a. Compressed air is injected from the 2nd nozzle hole 34b so that it may flow to the turning direction 70 which progresses to one direction axial direction (FIG. 7A). Accordingly, in step s23, the projection 23 fitted into the second groove 34a is swiveled several times around the axis of one branch 51 and wound around one branch 51 (Fig. 23). 7B). By winding it in this way, you may fix the projection part 23 and one branch part 51. FIG.

In the present embodiment, the compressed air flows by rotating around the axis L2 while advancing in the inclined direction A by the second nozzle hole 34b. As a result, the protrusion 23 is easily folded toward one branch 51 and wound around one branch 51 (FIG. 8). In addition, when viewed from the cross section perpendicular to the axis L2, the inclination direction A is directed toward the inner circumferential surface of the second groove portion 34a by deflecting the axis L2. Accordingly, the compressed air can be pivoted about the axis L2 along the inner circumferential surface of the second groove 34a (Fig. 9). By carrying out the second embodiment also in the order shown in the first embodiment, a real joint can be similarly obtained, and the same effect as in the first embodiment can be obtained.

Further, by turning the protrusions 23, the twisting of the branch 51 can be prevented from being released regardless of the ejection time of the compressed fluid, and the diameter of the branch 51 overlapping with the protrusion 23 and the area around it is thin. By preventing the loss of the yarn can be prevented from decreasing the strength. Moreover, the timing of ejection of the compressed fluid can be widened, and real joint control can be easily realized. Moreover, it is preferable that the turning direction 70 is a direction to which the twist of one branch part 51 is tightened.

In the thread joint device 30A of the second embodiment, swing resistors 71 and 72 serving as resistors for preventing the respective branch portions 51 from pivoting about an axis line are provided. In the present embodiment, the turning resistors 71 and 72 are realized by a tension applying device that applies tension to the knitting yarn 41 and are disposed on the upstream and downstream sides of the second splice head 34 in the steep direction. Therefore, in the protrusion fixing step, even if the turning flow caused by the compressed air can be prevented, the branch portions 51 and 52 turn together with the protrusion 23. As a result, it is possible to ensure that the protrusion 23 is relatively rotated with respect to the branch 51, and the time required for winding the protrusion 23 to the branch 51 can be shortened.

In this way, the protrusion fixing step may be an intertwining method shown in the first embodiment because the protrusion 23 is fixed in a folded state along the one branch 51, and the winding method shown in the second embodiment. (winding method) may be sufficient. As another method, the protrusions 23 and the branch 51 may be mechanically rubbed or twisted to integrate them.

In addition, in the present embodiment, the knitting method of yarn knitting is described, but the present invention can be applied to the overall method of threading the spun yarn in which fibers are spun. Therefore, it may be applied to threaded joints of weaving yarns made of spun yarn. In each of the present embodiments, the protrusion 23 is fixed integrally with the branch 51 on the upstream side of the yarn feeding direction B with respect to the connecting portion 50, but the yarn feeding direction B with respect to the connecting portion 50. It may be fixed integrally with the downstream branch 52. This case is realized by inserting the connected knitting yarn 24 into the second groove portion 34a of the second splice head 34 in the opposite direction to the steeping direction B. As shown in FIG.

In this embodiment, the first splice head 33 is disposed on the upper side and the second splice head 34 is disposed on the lower side, but the first splice head 33 is disposed on the lower side and the upper side is disposed on the upper side. The second splice head 34 may be disposed. In this case, the steeping direction B also becomes a direction from below to upward. Thus, arrangement | positioning of each splice head 33 and 34 is not limited, A direction X1-X3 can also be set arbitrarily. In another splice head, a splicing yarn connecting step and a protrusion fixing step may be performed.

In the present embodiment, the splice heads 33 and 34 inject compressed air into the yarn, but other compressed fluid such as liquid may be injected into the yarn. By injecting compressed air into the yarn, the connection of the yarn and the fixing of the projections can be realized with a simple configuration. The thread joint device 30 can be used in addition to the interstitial knitting. For example, since the flat knitting machine 31 is provided with the thread fitting device 30, the kind of the knitting yarn 41 which the yarn feeder 37 can steep can be increased.

Fig. 11 is a front view showing the knitting yarn 24B connected in the spinning yarn connecting step of the thread joint method according to the third embodiment of the present invention. 12A to 12D are front views each showing a state where the protrusions 23a and 23b are fixed. In the third embodiment, the same configuration as in the first or second embodiment is provided except that the connection method is different in the spinning yarn connecting process as compared with the first or second embodiment, and the description of the same configuration is omitted.

In the third embodiment, a plurality of knitting yarns 21 and 22 are connected by tying together by a knotter device, which is a thread binding device. In a state where two strands of knitting yarns 21 and 22 are connected, knots are formed in the separating portions 21c and 22c. Accordingly, the connecting portion 50, the protrusions 23a and 23b extending from the connecting portion 50 to the tip portions 21a and 22a of the respective knitting yarns 21 and 22, and the plurality of knitting yarns 21, A plurality of branch portions 51, 52 extending toward the base ends 21d, 22d of 22, respectively are formed. In the third embodiment, as many projections 23a and 23b as the number of knitting yarns 21 and 22 to be connected are formed. For example, a notch device is disclosed in Japanese Laid-Open Patent Publication No. 6-2250.

In the third embodiment, as in the first or second embodiment, the protrusions 23a and 23b are fixed in the superimposed state by following the at least one branch 51 and 52, respectively. In the projection fixing step, the projections 23a and 23b may be entangled in one branch 51 to be fixed (Fig. 12A), and the projections 23a and 23b may be fixed to the other branching portions 51 and 52, respectively. It may be entangled and fixed (Fig. 12B). In the projection fixing step, the projections 23a and 23b may be wound around one branch 51 to be fixed (Fig. 12C), and the projections 23a and 23b may be attached to the other branch 51 and 52, respectively. It may be wound and fixed (Fig. 12D). Also in the third embodiment, by performing the protrusion fixing step, the protrusion amounts H12 to H15 from which the protrusions 23a and 23b protrude from the branch 51 can be made smaller than the protrusion amount H11 before fixing the protrusions.

In this way, the yarn knitting step may be such that each knitting yarn 21, 22 is connected so that the plurality of branch portions 51, 52 branch from the protrusion 23, and may be an intertwining method shown in the first embodiment. The knotting method shown in the third embodiment may be used. Note that a notifier device for forming knots other than the knots shown in FIG. 11 may be used. The knitting yarns 21 and 22 may be connected by another method in which the protrusions 23 are formed, the kneading method, or the twisting method.

In the present embodiment described above, a method of threading two strands of knitting yarns 21 and 22 has been described, but a plurality of yarns having three or more strands such as two strands or a plurality of strands are connected. Even in the case of a joint, the same thread joint method can be applied by looking at the knitting of a plurality of knitting yarns as a single strand of knitting. The machine provided with the thread fitting device 30 of the present embodiment is not limited to the flat knitting machine 31, but may be another machine such as a weaving machine or a winder. In the present invention, the present invention also includes spun yarns that are threaded by a thread joint method, knitted fabrics or woven fabrics knitted and woven by the yarn.

This invention can be implemented in other various forms, without deviating from the mind or main characteristic. Therefore, the above embodiments are merely examples in all respects, and the scope of the present invention is shown in the claims, and is not limited in any way to the text of the specification. In addition, all the variations or changes which belong to a claim are within the scope of the present invention.

According to the present invention, in the spinning yarn connecting step, a connecting portion, a protrusion, and a plurality of branching portions are formed in each yarn. By connecting the respective yarns in the connecting portion, it is possible to prevent the outer diameter of each branch from being small when connecting the yarns, and to secure the strength of the yarns being threaded together. Moreover, in a process of fixing a projection, by stacking the projection along the branch, and fixing the projection and the branch, the amount of protrusion of the projection from the branch can be suppressed. In addition, if the knitted fabric is knitted using a threaded spun yarn, the projections are prevented from protruding outward from the face stitch of the knitted fabric, and the knot treatment for inserting the projections projecting outward from the face stitch of the knitted fabric into the inside of the knitted fabric. The process can be omitted.

According to this invention, the branch part and the protrusion part arrange | positioned at the upstream of a steep direction are fixed. As a result, the resistance of the thread feed when the yarn is suddenly fed can be made smaller than when the distal end of the protrusion is disposed downstream of the yarn feeding direction, so that the yarn feed of the spun yarn can be smoothed.

According to the present invention, in the protrusion fixing step, after each of the protrusions and the branch portions are partially twisted, they are entangled with each other. As a result, excessive thread entanglement can be prevented between the protruding portion and the branching portion, thereby preventing the diameter of the branching portion overlapping with the protruding portion and its surrounding area from becoming thin, thereby preventing the strength of the threaded spun yarn from decreasing. have.

According to the present invention, in the protrusion fixing step, the protrusion is turned around the axis of the branch and the protrusion is wound. By turning the projections, it is possible to prevent the twisting of the branch portions from being loosened, and to prevent the diameters of the branch portions overlapping the projection portions and their surrounding regions from being thinned, thereby preventing the strength of the threaded spun yarn from becoming small.

According to the present invention, in the step of fixing the projection, by preventing the branch from turning together with the projection, the time required for ensuring the relative rotation of the projection relative to the branch and winding the projection to the branch can be shortened.

According to the present invention, in the step of fixing the protrusions, the force of folding the protrusions toward the branch to be fixed by spraying the pressurized fluid can be applied, and the protrusions can be more securely fixed to the branch.

According to the present invention, in the spun yarn connecting step, a plurality of spun yarns can be connected by connecting the spun yarns by one of a method of entangled with each other and a method of binding yarns together.

According to the present invention, it is possible to prevent the decrease in strength and to suppress the amount of protrusion of the protrusions protruding from the branch portion, thereby obtaining a spun yarn with small radial irregularities.

According to the present invention, it is possible to realize a knitted fabric in which part of the yarn is prevented from protruding outward in the thickness direction.

According to the present invention, by connecting the spun yarn at the connecting portion by the spun yarn connecting means, it is possible to prevent the outer diameter of each branch portion from being smaller when connecting the spun yarn can secure the strength of the spun yarn threaded. In addition, by the projection fixing means, the projection is installed and fixed along the branch, so that the amount of protrusion that the projection protrudes from the branch can be suppressed. As a result, the protruding portion is prevented from protruding outward from the face stitch of the knitted fabric, and the knot processing step of inserting the protruding portion into the knitted fabric inside can be omitted.

According to the present invention, the projection fixing means secures the branch portion and the projection arranged on the upstream side of the yarn feeding direction, so that the yarn feed can be made small and the yarn feed of the spun yarn can be smoothed.

According to the present invention, the protruding portion fixing means can fix the protruding portion and the branching portion by partially tangling the protruding portion and the branching portion or by winding the protruding portion.

According to the present invention, the spun yarn connecting means can connect the separating portions of the plurality of spun yarns by intertwining or tying the plurality of spun yarns together.

According to the present invention, the first splice head connects the plurality of yarns by injecting a compressed fluid to a portion where the yarns are stacked. The second splice head fixes the protrusion and the branch by spraying the compressed fluid to the protrusion formed by the first splice head. By using the compressed fluid in this way, it is possible to connect a plurality of yarns and fix projections and branches.

Claims (17)

As a thread joint method for joining the ends of a plurality of yarns, A plurality of spun yarns connected to each other, the connecting portion which is separated from each other in the direction from the distal end of the plurality of spun yarns towards the proximal end, the connecting portion extending from the connecting portion to the distal end of each spun yarn, and the proximal end of the plurality of spun yarns at the connecting portion A spun yarn connecting process of forming a plurality of branches each extending in each spun yarn; The projection part is superimposed by following at least one branch part of a plurality of branch parts, and the projection part fixing process of fixing the branch part which overlaps the said projection part and the said projection part is carried out. Equipped , In the spinning yarn connecting step, a plurality of yarns are entangled to connect the separating parts of the yarns. According to the first, In the projecting part fixing step, the branch part to which the projecting part is fixed is a branch part which is arranged on the upstream side in the yarn feeding direction in which the yarns are suddenly conveyed with respect to the connecting part. 3. The method according to claim 1 or 2, In the projecting portion fixing step, after each of the protrusions and the branch portions are partially twisted, the twisted portions are entangled with each other to fix the protrusions to the branch portions. 3. The method according to claim 1 or 2, In the projection fixing step, a yarn joint method is characterized in that the projection is pivoted about an axis of the branch to wind the projection to the branch to fix the projection to the branch. 5. The method of claim 4, In the projection fixing step, the thread joint method is characterized in that the projection is wound around the branch in a state where the branch is prevented from turning together with the projection. The method of claim 3 , In the protrusion fixing step, a compression fluid is injected in the direction toward the protrusion toward the branch to be fixed, and the thread joint method is characterized in that fixing the protrusion and the branch. A spun yarn threaded by the thread joint method according to claim 1 . A knitted fabric knitted by a yarn spliced by the thread joint method according to claim 1 . A thread joint device for joining ends of a plurality of yarns, A plurality of spun yarns are connected to each other, the connecting parts which are separated from each other in the direction from the distal end of the plurality of spun yarns towards the proximal end, the connecting parts extending from the connecting part to the distal end of each spun yarn, and the proximal ends of the plurality of spun yarns at the connecting part Spun yarn connecting means for forming a plurality of branch portions extending in each spun yarn, respectively; A protrusion fixing means for overlapping the protrusion along at least one branch of a plurality of branches, and fixing the branch overlapped with the protrusion and the protrusion. Respectively, The yarn connecting means, the yarn joint device, characterized in that the plural yarns are entangled to connect the separating portions of the yarns. 10. The method of claim 9, And said projection fixing means secures the projection to a branch portion disposed on the upstream side in the yarn feeding direction in which the yarns are suddenly conveyed to the connecting portion. The method of claim 9 or 10, The projection fixing means is a thread joint device, characterized in that after twisting the projection and the branch part partially, the twisted part is entangled with each other to fix the projection and the branch. The method of claim 9 or 10, And the projection fixing means pivots the projection about the axis of the branch to wind the projection to the branch to fix the projection and the branch. The method of claim 11 , The spun yarn connecting means includes a first splice head for connecting a plurality of spun yarns by injecting a pressurized fluid to a portion of the spun yarns overlapping, the projection fixing means, by injecting a pressurized fluid to the protrusions and the projections; And a second splice head for securing the branch portion. 5. The method of claim 4, In the protrusion fixing step, a compression fluid is injected in the direction toward the protrusion toward the branch to be fixed, and the thread joint method is characterized in that fixing the protrusion and the branch. The method of claim 5, In the protrusion fixing step, a compression fluid is injected in the direction toward the protrusion toward the branch to be fixed, and the thread joint method is characterized in that fixing the protrusion and the branch. The method of claim 12, The spun yarn connecting means includes a first splice head for connecting a plurality of spun yarns by injecting a pressurized fluid to a portion of the spun yarns overlapping, the projection fixing means, by injecting a pressurized fluid to the protrusions and the projections; And a second splice head for securing the branch portion. delete

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