JPS6039767B2 - How to join spun yarn - Google Patents

Description

[Detailed description of the invention] The present invention relates to a spun yarn splicing method.

Two yarn ends are spliced by applying compressed sulfur to the overlapping yarn ends.

A device for performing such yarn splicing, for example, U. S. P400
In the device shown in 2012, two yarn ends are inserted into a yarn joining hole with the yarn ends facing in opposite directions, and compressed air is jetted into the yarn joining hole to separate the two yarn ends. The overlapping part vibrates or rotates and intertwines with the yarn ends to perform the yarn splicing, but the overlapping parts of both ends of the yarn are clamped at two positions at the same time, and are constrained within a specific section. If the overlapping part of two yarn ends of specific dimensions is turned, the fibers of the two yarn ends between the clamp points will be wrapped by false twist, and the yarn splicing will be performed. The parts protrude from both ends of the seam and remain as corner parts.

These corners may get caught by knitting needles in the subsequent weaving process, causing yarn breakage and deteriorating the quality of cloth and textiles.

Furthermore, according to the above-mentioned device, there is a part where the yarn ends are wrapped in the opposite direction to the yarn's inherent twist direction at the seam, resulting in a double thread shape.
Sufficient thread strength and thread thickness will not create seams.

That is, by applying a unidirectional jet swirling air flow to approximately the middle of the overlapping portion of both yarn ends, the overlapping portion is ballooned, and the yarn ends on both sides of the point of application of the compressed air are twisted in the opposite direction. As a result, the yarn ends to be spliced are given a twist in the same direction as the twist inherent in the yarn and a twist in the opposite direction.

Therefore, the strength is high on one side of the t-joint, but the strength is low on the other side, and the maximum value of the tensile strength is determined by the weak point, so the strength of the joint as a whole is low. The present invention has been made to solve the above-mentioned problems, and provides a yarn splicing method in which the strength of the yarn and the thickness of the seam are approximately equal to those of the single yarns to be spliced.

That is, the feature of the present invention is that the threads to be spliced have a unique twist in one direction, and the thread ends of both threads are inserted into the thread splicing hole in an overlapping manner so that the thread ends face in opposite directions. The tip is in a free state, and a swirling fluid flow in opposite directions is applied to at least two different positions of the overlapping portion in the yarn splicing hole, and the direction of the swirling flow is the direction in which each original yarn is untwisted. By doing so, the seam formed has a beautiful twist in the same direction as the original twist of the original yarn, and has a structure that is extremely close to the yarn structure of the original yarn, and has a good structure in terms of yarn strength, elongation, number of twists, etc. It is possible to obtain seams similar to those made with single yarn.

The principle of the yarn splicing method of the present invention will be explained with reference to FIG. In addition, "thread" used in the following explanation is a general term for natural fibers such as cotton, wool, and hemp, so-called staple fibers made by short-cutting compound long fibers, and spun yarns made by concentrating mixed fibers of these fibers. However, it may be possible to apply compound twilled endless fibers to the present invention by partially changing the setting conditions.

Further, it is assumed that the "yarn" has a unique number of twists per inch due to the spinning process, and the twists are distributed almost uniformly over the entire length of the yarn.

In Fig. 1, one thread is cut to form thread ends YP and YB, which are stacked parallel to each other or crossed so that the ends of the threads are in opposite directions. It is prepared for thread splicing in a state where the flame has been extinguished.

The wisteria-twisted portion is a portion where the twist inherent in the yarn is almost zero or has a twist number slightly greater than the twist number inherent in the yarn, and preferably a non-twisted state in which the fibers constituting each yarn are approximately parallel is suitable.

Furthermore, the yarn end tip portions of each of the yarns YP and YB are in a free state without being restrained, while the yarn portions at a certain distance from the yarn end tips are clamped and go beyond the clamping points K1 and K2. The twist does not propagate and becomes a fixed point.

In this state, two positions C1 and C with different overlapping areas
2, both yarns YP and YB are turned in different directions X1 and X2.

That is, the above-mentioned turning direction is related to the unique twist direction of the yarn to be spliced, and the turning direction at position CI is the direction in which the unique twist of the yarn between the clamp point KI of the yarn YP and the turning point CI is untwisted. x1, and similarly, the turning direction at position C2 is set to the direction X2 in which the twist peculiar to the yarn between the clamp point K2 and heating point C2 of the yarn YB is unraveled.

The illustrated yarns YP and YB have a unique twist in the Z direction, and when they have an S twist, of course, the turning directions X1 and X2 are opposite directions. In addition, as a means for swirling the above-mentioned thoughts, a swirling flow by fluid injection is applied, and the most easily available air flow is used. The behavior of the thread caused by the above swirling action will be explained next.

For purposes of explanation, the area between the clamp point K2 and the tip of the yarn end of the yarn YB is divided into areas AI to A4.

That is, the area AI is the area from the swirling flow applying point CI to the tip of the yarn end, and the area A2 is the area from the swirling flow applying point CI to the swirling points C1, C.
2 to the center position M between 2, area A3 to the turning point C2, A4 to each area from the turning point C2 to the clamp point K2, and similarly for the yarn YP from the yarn end tip to BI to B.
Suppose that it is divided into 4 parts.

The swirling flow in the direction of the arrow x1 at the swirling point CI creates areas AI and A2 of the yarn YB and areas B3 and B4 of the yarn YP.
turns in the same direction as the arrow x1 direction.

At this time, the firing force of S twist is applied to the yarns in areas AI and B4, and the twisting force of Z twist is applied to the yarns in areas A2 and B3, but the area AI of yarn YB is given the free state law. Since it is in an open-end state, the S twist in the area disappears, and the area A
The actual twist of the Z thread remains in 2, and the loosened fibers of A2 and A3 are entangled and merged with each other while being twisted in the Z thread, and the yarn end of the area AI is entwined with the yarn YP of the area B4 in the Z direction. together,
It is heated.

If the yarn in area B4 is also loosened, AI,
The fibers of the A4 castle also intertwine and coalesce, forming a single Z-twisted thread.

Note that area B4 of yarn YP is likely to untwist as it turns in the direction of untwisting the yarn, but areas B3 and B4
If the turning of the yarn part of YB is prevented as much as possible, A1, A2 of yarn YB
Since the yarn end of the portion mainly revolves around the yarn YP, the yarn YB itself becomes Z-twisted and is also wound around the yarn YP in the Z direction.

Further, a similar state as described above occurs when the anchor turns in the direction of the arrow X2 at the anchor turning application point C2, and since the tip BI of the yarn YP is in a free state, the Z twist is applied to the area B2 of the yarn YP while the areas B1 and B2 The fibers are entangled with the fibers of the thread YB and combined to form a single thread, which is wound in the Z direction.

Therefore, the yarn ends AI, A2 of the yarn YB on the CI side from the intermediate point M between the turning points CI, C2 are Z in the areas B4, B3 of the yarn YP.
The yarn ends B1 and B2 on the C2 side from the intermediate point M are wound in the Z direction, that is, in the same direction as the yarn's unique twist direction, and the yarn ends B1 and B2 on the C2 side from the intermediate point M are wound in the Z direction, that is, in the yarn's unique twist direction. The yarn is wound while being heated in the same direction, so that the twist in the same direction as the original yarn twisting direction is applied to the entire spliced area. The joint will have the same structure as the original thread.

The seams spliced in this way are shown in FIGS. 2 and 3.

Figure 2 is a sketch of a seam when the yarn ends are decombusted over the entire area where the yarn ends overlap. In this case, there is no distinction between the two threads, and the fibers at the ends of each thread are intermixed and combined into a single thread as they are twisted. The yarn properties of the seam are almost as good as those of the original single yarn, resulting in a high-quality seam.

Furthermore, there are no corners where both ends of the yarn protrude.

Figures 3 A to 2 schematically show the differences in the joint structure formed due to the difference in the untwisted state of the overlapping yarn end portions, and the seam Y2 shown in Figure 3 A gives a swirling flow. Point CI
, C2, the fibers are tightly intertwined and mixed together so that they cannot be distinguished from each other, forming a single thread-like part Y2a, which is twisted in the same direction as the original thread (Z twist), and the fibers on both sides are The yarn end portions are entwined on top of each other, and in this case it is thought that the yarns were spliced under the untwisted state shown in the first figure.

Note that the entangled portions Y2b and Y2b on both upper sides are also entangled in the same direction as the inherent twist of the yarn, contributing to the yarn strength to some extent. Seam Y3 at the opening in Figure 3 is the opposite case to A, in which the two yarns are separated between the turning points C1 and C2 and entwined in the same direction as the yarn's own twist, and the yarn ends on both sides are tightly connected. It is a peach that is mixed together and joined into a single thread.

Furthermore, the seams Y4 and Y5 in FIG.

As shown in the examples of each yarn splice above, in all cases, the twist direction of the seam coincides with the unique twist direction of the spliced yarn throughout the seam, regardless of the area where each yarn end is entwined in a distinguishable state. It has a real twist in the direction. Therefore, the yarn properties such as yarn strength, yarn thickness, elongation, and number of twists are almost the same as those of single yarn.

Note that the seams in Figure 3 A to 2 above are shown vaguely, and may vary depending on various conditions such as air pressure, air volume, inner diameter of the air jet nozzle, angle of the nozzle jet hole, number of jets, etc. It becomes a deformed seam.

Furthermore, the seams may be variously deformed depending on the type of yarn to be spliced, the fiber length, and the untwisted state.

Next, an embodiment of the above seam forming apparatus will be described with reference to the drawings.

FIG. 4 shows a schematic diagram of an automatic winder to which a yarn splicing device is applied, in which a shaft 2 and a suction pipe 3 are installed between each side frame 1, and a winding unit 4 is rotatably supported by the shaft 2. When the automatic winder is in operation, the unit 4 is also sent to the pipe 3 and fixed as appropriate.

Note that the pipe 3 is connected to a blower (not shown), and a suction air current is constantly applied thereto. In winding the yarn from the bobbin B to the package P in the winding knit 4, the yarn YII pulled out from the bobbin B on the veg 5 is connected to the guide 6, the tensor 7, the slub, etc. to detect yarn unevenness, cut, and run the yarn. It passes through a detection device 8 that also serves as a detector, and is wound onto a rotating package P by a winding drum 9.

At this time, when the detection device 8 detects yarn unevenness in the yarn, a cutter installed near the detection device is activated to
I is cut, and while winding is stopped, a yarn splicing operation is performed.

That is, the suction mouth 10 operates to guide the yarn YP on the package side, and the relay pipe 11 guides the yarn YB on the bobbin side to the yarn splicing device 12 installed at a position away from the normal yarn running path YII. After the yarn is spliced by the splicing device 12, IJ winding of the yarn is continued.

Note that the suction mouth 10 and the relay pipe 11 are connected to a pipe 3 on which a suction airflow acts.

Further, since the yarn splicing device uses fluid such as compressed air, a conduit 14 is connected between the pipe 13 of a separate route and the yarn splicing unit 15. A schematic configuration of the yarn splicing device 12 is shown in FIGS. 5 and 6.

During normal IJ winding, thread YII is bobbin B
A fixed guide 16 is provided on one side of the detection device 8 and the detection device 8, and a rotating guide 1 is provided on both sides of the detection device.
7, 18 and above the yarn splicing device 12, the package P
We are taking a route that leads to.

The yarn splicing device 12 basically includes a yarn splicing member 101, a yarn pressing device 102, untwisting nozzles 103 and 104, and a yarn shifting lever 1.
05, thread cutting devices 106, 107 and thread clamping device 1
08, 109, the suction arm 10
The suction ports at the tips of the relay pipes 11 rotate above the yarn splicing device '2 so as to intersect with each other, sucking the yarn end YP on the package side and the yarn end YB on the bobbin side and moving to the outside of the yarn splicing device 12. and stop.

Note that the suction mouse 10 and the relay pipe 11 are not operated at the same time, but with a slight time lag.

That is, first, the yarn end YP on the package side swings by one suction mouth to the outside of the yarn splicing device 12 and stops, and almost at the same time, the pivot lever 20 of the yarn clamp device 109 on the package P side is controlled by a control (not shown). The cam rotates counterclockwise to a chain line position 20-1 as shown in FIG.

At this time, the thread YP is moved while being hung on the hook portion 20a of the swing lever 20, and is held between the support block 21 and the swing lever 20.

On the other hand, while the turning lever 20 is operating, the thread YP located on the fixed guide 16 and the turning guides 17, 18 is
, 18a into the guide groove 19, the presence or absence of the yarn YP is confirmed by the detection device 8 installed at the same level as the guide groove 19, and the presence or absence of the yarn YP is detected by the suction mouse.
A check is made to see if more than one thread has been suctioned, and after checking the thread YP, the swivel guides 17 and 18 are rotated counterclockwise around the spindle 22 as shown in the eighth figure by a control cam (not shown). Then, the yarn YP is removed from the detection device 8 and carried into the revolving guides 17 and 18 into the relief grooves 17b and 18b.

Furthermore, almost at the same time as the pivoting guides 17 and 18 rotate, the thread end YB on the bobbin B side is sucked by the relay pipe 11 and pivots in the opposite direction to the suction mouth 10.
It moves to the outside of the yarn splicing device 12 and stops.

Almost at the same time as the relay pipe 11 stops turning, the support plate 23a of the thread clamping device 108 moves along the guide plate 24 by a control cam (not shown) to move the turning lever 20.
The thread YB is moved in the same direction as the support plate 23a when it comes into contact with the support block 23b of the localization calendar.
and the support block 23b.

At this time, the thread YB is hung on the hook portions 17C, 18C near the tips of the rotating guides 17, 18, as shown in FIG.
The check by the detection device 8 is performed after the yarn splicing is completed.

A yarn splicing member 101 is installed approximately in the center of the yarn splicing device 12, and on both sides with the yarn splicing member 101 in between, as shown in FIG.
02, untwisting nozzle 103, 104, guide plate 27
a, 27b, guide rods 28a, 28b, and further thread cutting devices 106, 107 and fork guides 29, 30 are arranged in this order.

Further, a support shaft 31 and a support shaft 3 are provided on the side of the yarn all-over material 101
A thread shifting lever 105 consisting of levers 32 and 33 that pivots around 1 as a fulcrum is installed.

The detection device 8 detects a slab, fine yarn, etc. of yarn YII and cuts it with a cutting device (not shown), and the suction arm 10 and relay pipe 11 operate to separate the yarn ends YP and YB from each other. After being guided to the outside of the splicing device 12, the yarns YP and YB are guided toward the yarn splicing device 12. In addition,
The rotation range of the thread shifting lever 105 is fork guide 2.
9 and the thread clamping device 108.

The stopper 34 is movable to two positions, and the position where the thread guide lever 105 is stopped by the stopper 34 is the fixed position, which acts when the thread cutting device cuts the thread and further adjusts the overlapping length of different thread ends. A stopper 35 is provided as shown in FIG.

That is, in FIG. 9, the first stopper 34 is connected to the fixed shaft 36.
It is configured by fixing a block 38 to the tip of a bar 37 and can be pivoted to two positions centering on the bar 37, and via a rod 40 extending from a control cam 39 to an operating position shown in FIG. 9 and a non-operating position pivoted in the direction of arrow 41 Fixed position. That is, the thread cutting device 1
06, 107, the lever 32 of the thread shifting lever 105 is in a position where it touches the first stopper 34,
Keep the length from the thread end clamp point to the thread end tip constant.
Further, the second stopper 35 is fixed on an adjustment lever 43 that is rotatably movable around a fixed shaft 42, and
3, a pin 44 is fixed to the lower surface as shown in FIG. 10, and the pin 44 engages with a desired one of the positioning holes 45a to 45n drilled on an arc to select the position of the second stopper 35. It is determined. If the cam 46 rotates in the direction of the arrow 47,
The rod 49 is pulled in the direction of arrow 50 by the cam surface 48a, and the lever 32 turns to the first stopper 34a position, at which time the thread is cut.Then, the lever 32 returns once in the opposite direction, and at this time, the thread is cut. The twisted yarn ends are sucked into an untwisting nozzle, which will be described later.

Subsequently, the lever 32 is rotated again by the cam surface 48b,
Rotate to the second stopper 35 position.

At this time, the first stopper 34 has already been pivoted by the cam 39 to a non-operating position, that is, to the rear of the second stopper 35. That is, by turning the lever 32 to a position where it contacts the second stopper 35, the amount of the yarn end pulled out from the untwisting nozzle, that is, the amount of overlapping of both yarns in the yarn splicing member is determined. The greater the amount of rotation of the thread shifting lever, the greater the amount of thread end pulled out, and the shorter the overlapping length. 1st
A yarn splicing member 102 is shown in FIGS. 1 to 13.

The yarn splicing member 101 is screwed 53 to the bracket 52 via the front plate 51, and a cylindrical yarn splicing hole 54 is formed approximately in the center of the yarn splicing member 101.
Slit 5 suitable for inserting threads YP and YB from the outside
5 is formed over the entire tangential direction of the yarn splicing hole 54, and further closes tangentially to the yarn splicing hole 54.
6,57 are drilled. Note that the yarn splicing member 101 shown in FIG.
An embodiment of the yarn splicing nozzle is shown in FIGS. 14 to 16.

That is, the yarn splicing nozzle unit 58 has a substantially cylindrical shape, has a cylindrical yarn splicing hole 54, opens tangentially to the yarn splicing hole 54, and has a fluid flow ejected from the closed opening with an opposite swirling direction. Two ejection nozzle holes 56 and 57 are formed at positions □. Further, the nozzle holes 56 and 57 are connected to a fluid flow passage 59 formed around the cylindrical nozzle 58, and when the nozzle 58 is inserted into the yarn splicing section 101,
As shown in the figure, the passage 59 forms a closed passage from the peripheral wall surface of the nozzle insertion hole formed in the yarn splicing member and the upper and lower collar portions 60 of the nozzle, and a portion of the passage 59 forms a closed passage from the nozzle insertion hole formed in the yarn splicing member 1
It is connected to a fluid supply path 61 formed in 1.

The fluid ejection nozzle holes 56 and 57 at the two positions correspond to the swirling flow imparting points C1 and C2 in FIG. The direction corresponds to that in FIG.

Further, the yarn splicing nozzle unit 62 shown in FIGS. 17 to 19 shows another embodiment, in which the nozzle holes 63 and 64 are oblique with respect to the axial direction of the yarn splicing hole 54, and the nozzle hole 63 is a Sekiguchi The nozzle hole 64 is inclined in the direction toward the end surface 65, the oblique angle (a) is equal, and the interval is such that the air flows ejected from the nozzle holes 63 and 64 do not interfere with each other. provided and formed. Furthermore, the nozzle hole 63
, 64 first collides with the wall surface position 6.
The distance 11 between 7, 68 and the open □ end faces 65, 66 is at least zero or more, and the swirling amount of the fluid is sufficient to form a yarn splice, so that the swirling flow in the yarn splicing hole is sufficient. This is because if the distance 11 is too short, the air flow injected from the nozzle holes 63, 64 will immediately escape from the inside of the splicing hole, making splicing impossible.

By slanting the nozzle holes 63, 64 in the direction toward the open □ end face in this way, there is a greater possibility that the swirling flow of the fluid will be applied to the yarn end located outside the yarn joining hole.
The winding force can be applied to the tip of the yarn end of the overlapped yarn ends, the seam is uniform and is formed over the entire overlap length, and the yarn end protrudes from the seam surface and remains at the so-called corner part. This prevents the formation of pores and contributes to increasing the strength of the yarn.

20 to 22 show still another embodiment of the yarn splicing nozzle, in which the gap 12 between the yarn holes 70 and 71 is formed to be inclined in the direction toward which both ends of the yarn holes 54 of the yarn total nozzle unit 69 face. The nozzle holes 70 and 71 are formed with a gap 12 on the inner circumferential surfaces of the sides that approach each other to eliminate interference between the fluids ejected from the nozzle holes 70 and 71.

Therefore, the fluid ejected from the nozzle holes 70, 71 effectively becomes a swirling flow for yarn splicing, and can contribute to promoting the yarn splicing action and forming a strong seam. Further, FIGS. 23 to 25 show other embodiments of the yarn splicing nozzle, and the yarn splicing nozzle unit 7
One nozzle hole 73 of 2 is formed perpendicular to the axis of the yarn splicing hole 54, and the other nozzle hole 74 is inclined with respect to the center of the bag so as to generate a swirling fluid flow toward the open end surface. In addition, the diameter of the nozzle hole 73 is made smaller than that of the nozzle hole 74. In this case, the yarn splicing action is mainly performed by the fluid from the nozzle hole 74, but since the yarn end on the upper open end side becomes less entangled, fluid is further jetted from the nozzle hole 73, and the upper yarn end is It promotes entanglement and winding, has uniform twist throughout the seam, and eliminates particularly weak areas.

In addition, the above-mentioned yarn total nozzle units 58, 63, 69, 72
In both cases, the two-position nozzle holes are provided so that the openings of each nozzle face each other in plan view at the tangential position on the thread insertion slit side. Although there is little possibility that the fluid streams injected from the holes 57, 64, 71, and 74 will flow out from the slit 55,
The fluid flow ejected from the other nozzle holes 56, 63, 70, 73 has a swirling direction that matches the direction of the slit, and therefore has a high possibility of flowing out from the slit.
The ejected flows from 63, 70, and 73 first cross the slit position and go straight, and the fluid that has swirled along the inner peripheral surface of the yarn splicing hole is blocked by the straight flow, thereby minimizing the outflow from the slit. This was done to reduce the amount. Also, a pair of nozzle holes 56, 57, 63, 64, 70, 7
1, 73, and 74 may be provided on the same side with respect to a plane passing through the center of the yarn splicing hole.

That is, as shown in the yarn splicing nozzle unit 75 of FIGS. 26 to 28, nozzle holes 76 and 77 are provided on the same side.

In this case, the supply pipe 78 that supplies compressed fluid to the nozzle holes 76 and 77 can be easily provided.

That is, if the nozzle holes are provided in opposite directions, the supply path 6
1 as shown in FIG. 13, the nozzle hole 5
This is because a time lag occurs in fluid ejection from 6 and 57.

Note that it is desirable that the cross-sectional areas perpendicular to the passage of the supply passage 61 and the fluid passage 59 around the nozzle 58 shown in FIG. 13 be equal.

In FIGS. 11 to 13, control plates 2 are further provided on both sides of the yarn splicing member 101 via spacers 79 and 80.
5, 26 are screwed together, and the control plates 25, 26
The specific side edges 25a, 26a of the yarn splicing hole 54 are positioned at positions where they cross a part of the entrance part of the yarn splicing hole 54.

Among the control plates 25 and 26, the upper control plate 26 is for controlling the yarn YP that is connected to the package, and the lower control plate 25 is for controlling the yarn YB that is connected to the bobbin.

Therefore, the control plate 26 has a side facing the nozzle hole 56,
The control plate 25 is provided on the side facing the nozzle hole 57.

That is, the control plates 25 and 26, together with the thread press lever 102 described later, position the two threads inserted into the thread splicing hole 54 at a position where the threads are in contact with each other, and when the fluid is ejected, the first entanglement of both thread ends occurs. , prevents untwisting when both yarns are turned in a separated state, controls the flow rate flowing out from the entrances at both ends of the yarn splicing hole 54, and prevents the yarn ends from flying out. This is to suppress the rotation of the clamped original yarn and to control the flow of fluid so that the yarn end portion is sufficiently entwined with the opposing yarn.

That is, when the ejected fluid acts on the yarn ends YP and YB, a balloon is generated, and when the rotation speed of the balloon increases, each fiber near the balloon neck becomes loose due to the yarn swinging action of the balloon, resulting in yarn breakage. is more likely to occur. Therefore, the balloon rotational speed is controlled by the control plates 25 and 26 to be suitable for yarn splicing.

Furthermore, the thread presser devices 102 arranged on both sides of the thread splicing member 101 shown in FIGS. The yarn ends YP and YB untwisted by the end scale twisting nozzles 103 and 104 are pulled out from the scale twisting nozzles, and the yarn splicing member 1
01 in the yarn splicing hole 54, and also connect the yarn YP to each other.
, YB in relation to the control plates 25, 26.

Further, the yarn holding device 102 has the function of bending the yarn between the clamp point and the yarn splicing hole and preventing the propagation of untwisting, in conjunction with guide rods 28a and 28b, which will be described later.

As shown in FIG. 6, the thread presser device 102 has a thread presser plate 83 mounted on a thread bar 82 that can be rotated around a support shaft 81 fixed in position.
a, 83b are fixed, and the rod 84 is operated by a control cam (not shown), so that the thread presser plates 83a, 83b are pivoted as shown in FIG.

Further, as shown in FIG. 29, the yarn presser plates 83a and 83b are formed in a fork shape toward the tip, and the presser plates 83a and 83b have the same shape, and the presser plates 83a and 83b have the same shape.
The green thread presser sides 85a, 86b of the presser plates a, 83b are located above the upper surface of the front plate 51 to which the thread spool member is fixed during operation, and the yarn is held between the thread presser plates 83a, 83b and the front plate 51. Never. Yarn end twisting nozzle 1 arranged on both sides of the yarn pressing device 102
Since the untwisting nozzles 103 and 104 have the same structure, one untwisting nozzle 103 will be explained with reference to FIG.

That is, the yarn end YPI on the package side to be spliced into the nozzle hole 86 having a circular cross section formed in the bracket 52 is connected to the yarn splicing hole 5.
It will be introduced after 4.

The yarn end YPI is introduced into the nozzle hole 86 through the flexible pipe 87 by the suction action of the suction pipe 3 described above.

When the yarn end YPI is introduced into the nozzle hole 86, the yarn end YPI is untwisted by the fluid jetted from the fluid injection hole 88 which closes at an angle to the nozzle hole 86, and each fiber is brought into a substantially parallel state. It acts so that it becomes.

The injection nozzle 88 is desirably provided tangentially to the inner peripheral surface of the nozzle hole 86 so as to generate a swirling airflow in the direction opposite to the direction in which the yarn ends are twisted.

Fluid is supplied to the injection hole 88 through a through hole 90 of a pipe 89 connected via the conduit 14 described above.

It should be noted that the length of the scaled yarn end varies depending on the position of the entrance of the fluid ejection hole 88 into the nozzle, ie, the distance from the open surface of the upper end of the nozzle.

Therefore, the entrance position of the injection hole can be adjusted according to various conditions so that the type of yarn with short average fiber length, long yarn, or the untwisted state of the overlapping part in the yarn splicing hole of the yarn splicing member is most appropriate. It is desirable that the sub-IJ sub 91 is inserted so as to be able to move forward and backward.

Next, the guide fixed on the front plate 51 will be explained with reference to FIG. 11 and FIGS. 31 and 32.

The guide plates 27a and 27b are located on the center line of the yarn splicing hole 54 and fixed perpendicularly to the front plate 51, and as shown in FIG. It is arranged so as not to affect YB.

Further, guide rods 28a, 28b are provided on one side of the guide plates 27a, 27b on the front plate 51.
The guide rod 28a is fixed at a distance from the upper surface of the guide rod 28a.
, 28b extend parallel to the upper surface of the front plate 51 to the side ends of the front plate 51, are bent in an L shape, and are fixed to the front plate 51.

Therefore, the yarns YP and YB inserted into the yarn splicing hole 54 by the yarn shifting lever 105 are brought into contact with the guide rods 28a and 28b, as shown in FIG.
51 and take a route.

That is, as described above, during the yarn splicing operation, the yarn splicing hole 54 and the clamp device 1 are connected in cooperation with the yarn presser lever 102.
It is configured to bend the yarn between 08 and 109 and prevent the propagation of untwisting of the yarn due to the swirling flow in the yarn joining hole.

Furthermore, in FIGS. 5, 6, and 8, the thread cutting device 106,
107 is provided inside the guide plates 29 and 30,
Consisting of a fixed blade 92 and a movable blade 93, as shown in FIG. 6, when the rod 91 is actuated by a control cam (not shown), a fork-shaped forked lever 95 rotates clockwise and counterclockwise with a shaft 96 as a fulcrum. When the fork portion 97 of the lever 95 moves the support pin 98 at the other end of the movable blade 93, the movable blade 93 is configured to operate using the koji 99 as a fulcrum.

Further, the fork guides 29, 301 fixed to the outside of the thread cutting devices 106, 107 are formed with guide grooves 29a, 29b, 30a, 30b as shown in FIG.

Further, the thread shifting lever 105 installed on the side of the thread collecting lever 101 is rotated clockwise around the shaft 31 via the rod 31a by a control cam (not shown) as shown in Figs. YP, YB in guide grooves 29a, 29b, 30
a, 30b, and introduce the yarns YP, YB into the yarn splicing hole 54 from the inclined surface of the yarn splicing member through the slit.

Next, the overall yarn operation by the yarn splicing device will be explained.

In the yarn preparation and clamping process shown in FIG. functions, and the yarn splicing operation is performed by various control cams located on the shaft that rotates through the clutch, or by various control cams that interlock with the shaft.

Initially, the suction mouth 10 and the relay pipe 11
The yarn end is rotated at positions 10a and 11a shown in the figure with suction, and the yarn YP on the package P side and the yarn YB on the bobbin B side intersect with each other. It stops at the outer position of the connecting device.

That is, after the suction mouth 10 is activated, the relay pipe 11
7 and 8, the yarn clamping device 109 on the package side operates to clamp the yarn YP between the turning lever 20 and the support flock 21, and also to clamp the yarn YP near the detection device 8. The yarn YP is introduced into the guide grooves 19 of the fixed guide 16 and the rotating guides 17 and 18, and the detection device 8 is checked.

Subsequently, the pivotable guides 17, 18 pivot around the spinal column 22 to the chain line positions 17-1, 18-1 to remove the yarn YP from the detection device 8 and insert it into the relief grooves 17a, 18b. Furthermore, the relay pipe sucks the yarn YB on the bobbin B side, turns to a position outside the yarn splicing device 12, and stops.

At this time, the thread YB passes through the hook portions 17C and 18C of the above-mentioned swiveling guides 17 and 18, and is held between the support plate 23a and the support block 23b of the thread clamp device 108 as shown in FIG.

0} Thread tensioning and cutting process When the above-mentioned thread clamping process is completed, the levers 32 and 33 of the thread tensioning lever 105 shown in FIGS. YB is guided separately to each of the guide grooves 29a, 29b, 30a, 30b of the fork guards 29, 30, and is inserted into the yarn splicing hole 54 of the yarn splicing member 101 through the slit 55.

Next, the thread cutting devices 106, 107 cut the threads YP2, YB2 at a predetermined distance from the clamp devices 108, 109 as shown in FIG. The position at which the yarn is cut is related to the length of the spliced seam, and affects the appearance, texture and seam strength of the spliced seam, and the cutting position differs depending on the yarn count.

That is, in FIG. 33, the yarn Y on both sides of the yarn splicing member 101
P, YB are clamped by thread clamp devices 108, 109,
In addition, the thread shifting lever 105 is activated, and the rod 31 in FIG.
Thread cutting is performed in a state in which the lever a is moved in the direction of the arrow 31b by a control cam (not shown) and the levers 32 and 33 are rotated clockwise around the support shaft 31.

Note that the thread shifting lever 105 and the cutting devices 106, 10
7, the thread presser device 102 is on standby at a position 102a shown in two-dot chain line in FIG.

N Yarn end twisting step Next, as shown in FIG. 34, the yarn end untwisting nozzle 103,
When the yarn ends YP1 and YBI are suctioned by the yarn ends YP1 and YBI by the untwisting nozzle 104, the yarn shifting lever 105 moves in a direction away from the yarn at the same time or in succession, and the yarn ends YP1 and YBI are sucked deep into the untwisting nozzle as described above. A jet of fluid untwists the yarn into a spliced state.

Note that the suction timing of the scale twisting nozzles 104, 104 is desirably started immediately before the yarn is cut by the cutting devices 106, 107.

That is, when the yarn Y is cut, tension is applied to the yarn by the suction action of the suction mouth relay pipe, so the yarn ends YP1 and YBI, which have become free due to the yarn cutting, are scattered, and are sent to the untwisting nozzle 103. , 104, and the yarn end suction by the strand twisting nozzle may not be performed.

The fluid is supplied to the untwisting nozzle by switching a valve using a solenoid (not shown).

0 Yarn splicing process When the yarn ends YP1 and YBI are untwisted by the yarn end untwisting nozzles 103 and 104 in a state where they are passed through the yarn splicing, suction is applied to the untwisting nozzles 104 and 103 by the flexible pipe 87 and the fluid injection hole 88. At the same time or one after the other when the action stops, the third
5 As shown in Figure 5, the yarn shifting lever 105 operates again to guide the yarn ends YP1 and YBI to the adjacent twisting nozzles 103.
, 104 and the untwisted yarn ends are overlapped with each other at a predetermined position of the yarn splicing member.

At this time, one lever 32 of the thread shifting lever 105 turns to a position where it supports the stopper 35, and the thread presser device 102 is activated and turns to the state shown in FIGS. 35 and 32, and the thread presser plate 83a , 83b and guide rod 28a
, 28b connects the yarn splicing hole 54 and the clamp device 108, 1.
Strictly speaking, the yarns YP and YB between the yarn splicing hole 54 and the yarn shifting levers 32 and 33 are bent during the interval 09.

The yarn ends YP1 and YBI, which had been inserted into the nozzle holes of the star twisting nozzles 103 and 104, are pulled into the yarn splicing hole 54 of the yarn splicing member 101 by the yarn shifting lever 105 and the yarn pressing device 102, and are pulled into the yarn splicing hole 54 of the yarn splicing member 101. 12, 13 The control plates 25, 26 and the yarn presser 102 control each other's yarn ends YP.
1. Positioning is set with MBI in contact. Next, after setting the yarn end, the fluid injection hole 5 in FIG.
The splicing is performed by the swirling flow of compressed fluid injected from the threads 6 and 57 according to the principle shown in FIG.

That is, the yarn end YP is clamped at the clamp point KI position and the yarn end tip BI is in a free state, the yarn end YB is clamped at the clamp K2 position, the yarn end tip A1 is in a free state, and the swirling flow imparting points C1 and C2 are in opposite directions. The swirling flow of

In the case shown in the first diagram, the unique twist of the yarn Y is the Z twist, so the swirling flow needs to be in the direction of the arrows X1 and ×2, but if the unique twist of the yarn to be spliced is the S twist Of course, the direction of the swirling flow is opposite.

As shown in the seam obtained in this way and in Figure 2, the entire seam contains the actual twist (Z) in the same direction as the twist inherent in the yarn, and the fibers are mixed and twisted into two threads. They have branch bonds.

An experimental example will be shown below regarding the comparison of the strength, elongation, number of twists, etc. of the seam thus obtained with the parent yarn, ie, single yarn.

Cotton Ne40 combed yarn was used, the nozzles shown in FIG. 13 and FIGS. 14 to 16 were used as yarn splicing members, and the air pressure of the air injection nozzle was 5.5k9/yen.

H) Yarn strength (B) Elongation One machine count In addition, in an experiment conducted under the above conditions using Ne7 combed cotton yarn, the yarn strength retention rate was 73.7% and the elongation retention rate was 73.7%. A result of 81.8% was obtained, and according to the above method, a wide range of yarns from pongee yarn to thick yarn is possible.

In the above experimental results, the obtained seam showed a high retention rate for the parent thread in terms of strength, elongation, number of twists, and direction of twist.
It shows a tendency similar to the yarn characteristics of single yarn.

As described above, according to the present invention, the tips of the yarn ends of two yarns inserted into the yarn splicing hole in a stacked manner with the yarn ends facing in opposite directions are in a free state, and at least Since swirling fluid in opposite directions is applied to two different grain layers in the overlapping part, the seam formed has a real twist in the same direction as the original twist of the original yarn, and The structure is very similar to that of a yarn, and it is possible to obtain a seam that is the same as a single yarn in terms of yarn strength, elongation, number of twists, etc.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the principle of the method of the present invention, Fig. 2 is a microscopic sketch of the seams obtained by the method, Fig. 3 is a schematic diagram of various seams, and Fig. 4 is a diagram of a winder with a yarn splicing device. The schematic configuration diagrams and FIGS. 5 to 32 show examples of the yarn splicing device,
Fig. 5 is a front view of the schematic configuration of the yarn splicing device, Fig. 6 is a plan view of the same, Fig. 7 is a plan view showing the operation of the clamp device, and Fig. 8 is a diagram of the thread presser, cutting device, and rotating guide plate. FIG. 9 is a plan view showing the configuration; FIG. 9 is a perspective view showing the stopper of the thread shifting lever;
Fig. 10 is an explanatory diagram of the adjustment action of the position conversion stopper, Fig. 11
The figure is a front view showing the state in which the yarn ends YP and YB are introduced into the yarn splicing device, FIG. 12 is a front view showing the positional relationship between the yarn splicing section and the control plate, and FIG. 13 is an example of the yarn splicing member. 14 to 16 are views showing an example of a yarn splicing nozzle unit, FIG. 14 is a plan view, FIG. 15 is a side view, and FIG.
The figure is a sectional front view, Figures 17 to 19 are views showing other examples of the nozzle unit, Figures 20 to 22 are views showing still other examples of the nozzle unit, and Figures 23 to 25 are views of the nozzle unit. 26 to 28 are diagrams showing an example in which the position of the nozzle hole of the nozzle unit is changed, FIG. 29 is a plan view showing the operation of the thread presser, and FIG. 30 is a scale twisting nozzle. 31 is a perspective view showing the relationship between the guide plate and the guide rod, FIG. 32 is a side view showing the bending state of the thread by the same device, and FIGS. 33 to 35 are the above-mentioned threads. It is an explanatory view showing yarn splicing operation by a splicing device. 54...Thread joining hole, YP...Package side thread end, YB...Bobbin side thread end, X1, X2.
...Turning direction, AI, B1...Tip of yarn end. Fig. 11 Fig. 2 Fig. 1 Fig. 2 Fig. 7 Detailed drawing Fig. 15 Fig. 16 Fig. 3 Fig. Sabamu Fig. 9 Fig. 10 Fig. 5 Fig. 6 Book 18 Four copies 17 Fig. 19 Fig. 20 Fig. 8 Fig. 13 Fig. 21 Fig. 22 Fig. 23 Fig. 2 Mu Fig. 25 Fig. 26 Fig. 27 Fig. 28 Fig. 29 Fig. 30 Fig. Hakama 31 Fig. 32 Fig. 33 Fig. Chrysanthemum Figure 34 Figure 35

Claims (1)

[Claims] 1. The ends of two threads inserted into the thread joining hole in a stacked manner with their ends facing in opposite directions are in a free state, and the ends of the threads are in a free state at least in two different positions of the overlapped portion in the thread joining hole. A spun yarn splicing method characterized in that both ends of the yarn are turned in opposite directions.