JPH0229099Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a yarn splicing device in a recursive automatic winder.

2. Description of the Related Art Automatic winders are known that rewind spun yarn, remove yarn defects such as slabs and fine yarns, and wind the yarn into a predetermined amount and shape. Knots for tying yarn knots, such as Fisherman's knots and Whisper knots, are well known as yarn splicing devices applied to such automatic winders. However, the number of knots is approximately three times that of a single yarn, and as a result, the thread may be cut in knitting machines, looms, etc. in subsequent processes, or even if the thread is not cut, the knots may be scattered on the fabric, and the back side of the fabric may be cut. There are disadvantages such as pushing it in and making the knot less noticeable.

As a means to eliminate the inconvenience caused by such knots, yarn splicing methods and devices such as the above-mentioned Fisherman's knot and Wiper's knot, which have a completely different knot structure from yarn splicing, have appeared, and the applicant had also previously proposed them.

That is, by applying compressed fluid to the overlapping yarn end portions, the yarn end portions are intermixed and the fibers are wrapped around each other to perform the yarn splicing. The resulting seam basically has a coexistence of yarn ends, enveloping each other's fiber tips, and imparting a certain amount of twist to the entire seam, resulting in an integral structure.

Furthermore, the seam thickness of the yarn joint is at least 3 times as thick as a single yarn in Fisherman's Knot and Wiper's Knot, but in the case of the seam mentioned above, it is just under 1.5 times that of a single yarn. be.

The object of the present invention is to provide such a yarn splicing device in an automatic winder with a recirculating winding unit to enable the yarn splicing described above.

That is, in the yarn splicing device previously proposed by the applicant, each winding unit is arranged and fixed in parallel, and each unit is connected to the yarn splicing device and a suction mouth for introducing the package side upper thread into the device, or a pipe side winding unit. Since it is equipped with a relay pipe that introduces the bobbin thread, the yarn splicing device is simply placed between the package cage and the pipe thread, and the thread end pulled out from the package cage is guided downward, the side thread end of the pipe thread is guided upward, and the vertical An overlapping portion is formed in a state substantially parallel to the direction, and preparation for yarn splicing is completed by simply pushing the overlapping portion into the vertically elongated yarn splicing hole of the yarn splicing device.

However, if it is an automatic winder with a recursive take-up unit and the yarn splicing device is fixed at one location outside the unit, the needle thread end on the package side and the thread end on the side thread of the tube are connected to the suction mouth or the relay pipe. Therefore, it is structurally extremely difficult to overlap them, and moreover, it would be necessary to make major structural changes to automatic winders that are already in operation and have fisherman's knot or wiper's knot type thread tying devices.

The present invention makes it possible to apply a yarn splicing device using fluid to a recursive type automatic winder, and will be described below along with a device implementing the present invention according to the drawings.

1 and 2 show the positional relationship between the automatic winder and the yarn splicing device.

The winding unit 1 is composed of a tube yarn B inserted into a lower peg, a winding package P rotated by an upper traversing drum 2, a tension device 3, a slab catcher 4, etc. A large number of units are arranged in a closed loop, and as shown in the first figure, the units move around on an elliptical orbit in one direction 5, and wind the yarn Y pulled out from the pipe yarn B onto the package P during the movement. It is.

If the yarn breaks or the yarn layer of the tube yarn B runs out while the winding unit 1 is currently moving around, the yarn travel sensing device is activated, the traverse drum 2 stops its rotation, and the winding unit 1 moves around while stopping the rotation of the package P, and stops moving when it approaches the automatic splicing device 7 located approximately midway between the circulating locus of the winding unit and the automatic yarn feeding device 6, and returns to a fixed position. Stopping, splicing, or emptying the yarn,
Start the new pipe yarn supply operation and yarn splicing operation.

The automatic yarn splicing device at a fixed position is provided with a yarn splicing device unit 8, a suction mouth 9 for pulling out the yarn end from the package P, a relay pipe 10 for pulling out the yarn end on the pipe yarn side, and a yarn guide bar 11. When splicing, the suction mouth 9 approaches the package P, sucks in the yarn end, and retreats as shown in the first and second figures.
approaches the tension device 3, sucks in the yarn end on the tube yarn side, and moves the first and second yarn ends by a guide mechanism (not shown).
The yarn end on the tube yarn side is lifted up by the rotation movement of the guide bar 11 after retreating to the position shown in the figure.

In this way, the yarn end YP on the package side, that is, the winding side, and the yarn end YB on the tube yarn side, that is, the yarn feeding side, are positioned vertically and parallel to each other, and the yarn guider rotates across the yarn ends YP and YB positions. The yarn is guided into the yarn splicing unit 8 by the guide 12, and the yarn splicing operation is performed.

Figures 3 to 5 show the schematic structure of the yarn splicing unit, and when the unit is a single unit, Figure 3 is a plan view, Figure 4 is a front view, and Figure 5 is a left side view of Figure 4. shall be.

The yarn splicing unit 8 basically includes a yarn splicing block 13, yarn end control nozzles 14, 15, yarn crossing introduction device 16, yarn cutting devices 17, 18, yarn clamp devices 19, 20, and yarn pressing device 21. configured.

A yarn splicing block 13 is screwed onto the upper surface of the bracket 22 via a top plate, openings at both ends of the yarn splicing hole 23 are located on the left and right sides in FIG. 4, and a slit 24 for thread insertion is formed on the upper surface.

Guide plates are provided on the left and right sides of the bracket 22 to guide the package side threads and the pipe side threads to predetermined positions.
5, 26, 27 are branched in three directions toward the package side as shown in FIGS. 3 and 4, and the plates 25, 26 are
A thread guide groove 28 is formed therebetween as shown in FIG. 5, and a thread 29 is screwed therebetween.

Guide plate 3 that guides the yarn on the one side
0 and 31 are screwed 33 to the bracket 22 with a thread guide groove 32 formed therebetween.

On the upper surface of the bracket 22, openings for control nozzles 14 and 15 and triangular pyramid-shaped thread guides 34 and 35 are provided near openings at both ends of the thread splicing hole 23.

Further, control plates 36 and 37 covering a portion of the hole and guide pins 38 and 39 are fixed to the openings at both ends of the yarn splicing hole 23, and to the outside of the plates. That is, in FIGS. 6 and 7, yarn splicing block 1
3 and yarn end control nozzles 14, 15 are shown.

Note that since the control nozzles 14 and 15 have the same structure, only the nozzle 15 side will be described.

In FIG. 6, the yarn splicing block 13 has a groove 40 with a V-shaped cross section, and is screwed onto the bracket 22 via a top plate 42 with a screw 41, and the yarn splicing block 13 is fitted into the V-shaped groove 40. Subsequently, a cylindrical yarn splicing hole 23 is formed through the yarn splicing hole 23, and a threading slit 24 formed tangentially to the hole 23 between the V-shaped groove 40 and the yarn splicing hole 23 extends through the entire yarn splicing hole 23 in the axial direction. It is formed over a period of time. Further, the yarn splicing hole 23 is provided with a compressed air jet hole 43 that opens tangentially to the inner peripheral surface of the hole 23 and is continuous with a compressed air supply pipe 44 that passes through the block 22.

In FIG. 7, a sleeve 47 having an oblique compressed air injection hole 46 is fitted into a nozzle hole 45 formed in the bracket 22, and a sleeve 47 is fitted into the nozzle hole 45 formed in the bracket 22.
A flexible pipe 48 leading to a blower is connected to the nozzle hole 45 to generate a suction air flow inside the nozzle hole 45 .

The fluid ejected from the injection hole 46, preferably a fluid flow swirling in the direction of untwisting the yarn end YP, untwists the yarn end YP sucked into the nozzle hole 45 into a state suitable for splicing. Relaxed.

Next, the yarn crossing introduction device will be explained with reference to FIGS. 3 and 4 and FIGS. 8 and 9.

That is, a crossing lever 50 is disposed between the block 22 and the front plate 51, and is reciprocally pivoted about a shaft 49 in FIG. 4 as a fulcrum.

The front plate 51 forms a thread guide 52 with a curved upper edge, and notches 53 and 54 are formed at both ends to guide the thread to the clamping device position. The left edge 50a of the crossing lever 50 moves the right thread to the left, and the right edge 50b of the crossing lever 50 moves the left thread to the right. Insert both yarns into the yarn splicing hole of the aforementioned yarn splicing block while crossing each other. The upper end edge 50c of the crossing lever 50 has a sloped edge that is higher on the right side and lower on the left side, so that when the lever 50 turns from right to left, the left thread engaged with the guide plate 27 is moved over the sloped edge 50c. It is designed to slide.

That is, as shown in FIGS. 8 and 9, the crossing lever 50 is moved from the waiting position on the right side of FIG.
When turning in the direction, the thread on the front plate 51
YB is moved in the same direction by the left edge 50a of the lever 50 and introduced into the left clamp position 54,
By reversing the lever 50, the thread YP on the guide plate 27 is moved in the direction of the arrow 56 by the right edge 50b of the lever 50, and is moved to the right clamp position 53.
The crossed yarns are introduced into the yarn splicing hole 23.

Next, a clamping device for gripping the thread guided to the clamping position by the crossing lever 50 will be explained with reference to FIGS. 3 and 4 and FIG. 10. The clamping devices 19, 20 include clamp levers 55, 5.
6, clamp guides 57, 58, and clamp pieces 59, 60, the clamp piece 5
Reference numerals 9 and 60 denote a front plate 51 and a T-shaped guide plate 6 fixed to the front surface of the front plate 51.
1. Furthermore, the cover guide 6 screwed onto the front surface of the guide plate 61 is inserted into the gap 63 formed by the cover guide 6 so as to be slidable left and right, and a spring 64 is inserted between the pieces 59 and 60 as shown in FIG. is inserted and constantly presses and urges the clamp pieces 59 and 60 to both sides.

The clamp pieces 59, 60 are formed with stepped portions 65, 66, as shown in FIG.
The standby position is determined by the clamp lever, and the clamp lever moves to follow the levers 55 and 56.

The clamp levers 55, 56 have fixed shafts 67,
It can swing around 68, and springs 69, 70
As a result, cam rollers 73 and 74 fixed to the intermediate back surface of the lever are biased in the directions of arrows 71 and 72, and are positioned by engaging in a cam groove of a cam cylinder 75, which will be described later.

Denoted at 76 and 77 are eccentric cams for adjusting the amount of rotation of the clamp levers 55 and 56, and one side edge of the lever comes into contact with the cam surface to determine the maximum rotation position.

Therefore, as the clamp levers 55 and 56 turn in the directions of arrows 71 and 72 in FIG. The other thread is clamped between the pieces 59 and between the clamp guide 58 and the clamp piece 60.

Next, the thread cutting devices 17 and 18 are shown in FIGS. 3 and 5, which cut the threads between the package cage and the suction mouth, and the threads between the tube thread and the relay pipe, into appropriate lengths. This will be explained in .

That is, the thread cutting devices 17 and 18 are provided on both sides of the bracket 22, as shown in the third figure.
Since they have the same structure, one cutting device 18 will be described with reference to FIG.

The fixed blade 78 and the movable blade 7 sandwich the thread guide groove 28 formed by the guide plates 25 and 26.
9 is supported on the side of the bracket 22.

A pin 8 is attached to the lever 80 having the movable blade 79.
A lever 82 is connected to the pin 81, supported by a fixed shaft 83, and a cam follower 8 is provided in the middle.
The lever 82 is connected to a cam lever 85 having a diameter of 4.

Therefore, as the cam 86 rotates, the movable blade 79 swings around the shaft 87 to cut the thread.

Note that 88 is a spring applied between the pin 81 and the fixed rod 89.

Next, the thread presser devices 21 disposed on both sides of the splicing block will be explained with reference to FIGS. 3, 11, and 12.

The thread holding device 21 includes clamp levers 55 and 56.
In connection with this, during yarn splicing, the yarn end control nozzle 14,
The untwisted yarn end is pulled out from 15, and the position of the yarn is regulated.

That is, the thread presser device 21 includes presser plates 91 and 9 on a pivot lever 90 that can pivot about a support shaft (not shown).
As shown in FIG. 4, for example, a rod 96 is abutted or fixed to one end of an L-shaped lever 95 that abuts a cam plate 93 and swings about a shaft 94. A collar 97 protruding from the presser plate 91 is engaged with the upper end of the rod, and a spring is always applied to the rotation lever 90 in the direction of lowering the rod 96.
The thread pressing operation can be performed at a predetermined time in accordance with the rotation of 3.

As shown in FIGS. 11 and 12, the thread holding plates 91 and 92 are formed in a fork shape toward the tip, and have somewhat different structures.

That is, when the yarn presser plates 91 and 92 rotate and one presser plate 91 comes into contact with the top plate 42 and presses the thread Y1 between the upper surface of the bracket and the presser plate, the thread Y1 is pressed between the other presser plate 92 and the top plate 42. thread Y
A slight gap 98 is formed through which the thread 2 can pass, and only the position of the thread is restricted.

Note that only one presser plate 91 is attached to the top plate 4.
2 and presses and grips the yarn by pressing the yarn that is untwisted from both ends of the balloon by the swirling airflow ejected into the yarn splicing hole, thereby preventing yarn breakage due to untwisting. This is because the other ends of the thread balloon in the direction in which the twist is applied, so there is no need to press and hold the thread with the thread presser, and it is sufficient to restrict the position of the thread.

13 and 14 show a developed view 75a of the cylinder cam 75 and the cam surface that actuate the aforementioned crossing lever 50 and clamp levers 55, 56. Among the cam grooves 99, 100, 101, the central cam groove 100 controls the crossing lever 50, and among the cam grooves 99, 101 on both sides, the cam groove 99 controls the clamp lever 55.
1 controls the clamp lever 56.

Each lever 50, 5 is located at the two-dot chain line position in Fig. 14.
The state in which the cam followers 102, 73, and 74 of 5 and 56 are present is the state shown in FIG. 4, that is, the position before starting the yarn splicing operation. The crossing lever 50 moves to the left by the groove 100a, reverses, moves to the right by the groove 100b, and suddenly stops 100c, and the clamp levers 55 and 56, which were stationary at this time, move against the side walls 99 of the grooves 99 and 101.
a, 101a, the thread is clamped between the clamp pieces 59, 60 that follow the clamp lever and the clamp guides 57, 58, respectively, and after this, the crossing lever 50 moves to the cam groove 1.
00d to the center, and during this time, the yarn end on the package side tube yarn side is untwisted into a state suitable for splicing by the aforementioned yarn cutting device and yarn end control nozzle.

Due to the subsequent rotation of the cylinder cam, the clamp levers 55 and 56 are moved against the side walls 99 of the cam grooves 99 and 101.
b, further moved outward by the 101b part,
The yarn in the yarn end control nozzle is pulled out, and both yarn ends are superimposed and positioned in the yarn splicing hole together with the yarn presser plate described above.

After the yarn splicing is completed, the clamp levers 55, 56 return to their original positions by the grooves 99c, 101, push the clamp pieces 59, 60 back to their original positions, and the clamp on the yarn end is released.

Furthermore, as shown in FIGS. 1, 15, and 16, the crossed yarns are blown off at the side of the yarn splicing unit 8 after the yarn splicing is completed, and looped as shown in FIG. 15.
A burr removal nozzle 104 for forming a YR is provided to remove burrs, slack, etc. of the yarn due to crossing, and to prevent mistakes from occurring in checking the yarn passing through the detector 105. The burr removal nozzle 104 is located between the intermediate guide plate 107 of the yarn guide 12 and the yarn splicing unit 8.
A nozzle is arranged substantially parallel to the side surface 107a of the thread splicing hole, and is arranged in the direction in which the air is ejected in the direction in which the thread comes out from the slit of the thread splicing hole.

Next, a yarn splicing operation in an automatic winder having the yarn splicing device as described above will be described.

(a) Yarn splicing preparation process In FIGS. 1 and 2, when the winding unit 1 with the yarn breakage stops at a fixed position, the suction mouse 9 approaches the surface of the package P and searches for the yarn end.
By suctioning and retreating to the original position, the package cage side yarn YP is pulled out, and then the relay pipe 10 returns to the solid line position along a trajectory (not shown) while suctioning the yarn end on the side of the tube yarn B, and the guide bar 11 scoops up the yarn YB connected between the pipe yarn B and the relay pipe 10 and moves it to the solid line position, making the two yarns YP and PB substantially parallel in the longitudinal direction.

After that, the thread guide 12 is moved to the arrow 109 in FIG.
direction, the guide grooves 110, 111 of the guide plates 107, 108 guide the package
is introduced into the yarn splicing unit, and the guide grooves 112, 1
13, the pipe side yarn YB is introduced into the yarn splicing unit 8.

At this time, as shown in FIG. The thread route is determined.

That is, the package cage side yarn end YP is in the guide groove 110.
It passes above the front plate 51 , contacts the guide plate 27 , passes along the side of the guide plate 25 , and extends into the guide groove 111 . On the other hand, the pipe side yarn end YB contacts the curved guide edge 52 of the front plate 51 from the guide groove 112 and extends from the side of the guide plate 30 to the guide groove 113.

(b) Yarn end crossing insertion process In the state shown in FIG. 17, that is, as shown in FIG. 8, the package cage side yarn end YP is on the guide plate 27,
With the pipe side yarn end YB positioned on the front plate 51, the cylinder cam 75 in the splicing unit 8 is rotated by the motor (114 in FIG. 1) via the gear 115.

That is, the cylinder cam 7 shown in FIGS. 13 and 14
5, the crossing lever 50 moves to the eighth position.
Moving in the direction of arrow 116 in the figure, the tube yarn side yarn end YB engages with the side edge 50a of the lever 50 and is transferred.

At this time, the thread YB is regulated by the corner 30a of the guide plate 30 and the side edge of the crossing lever 50 in FIG. Thread splicing hole 2 from slit 24 on the top surface of splicing block 13
It is inserted into 3.

Subsequently, the crossing lever 50 is reversed from the position shown in FIG. 9 and returned to its original position, but at this time, the side edge 50b of the lever engages the yarn end YP on the package side, and the yarn end is moved in the direction of arrow 117. The yarn end is guided to the side of the front plate 51 to position YP.
1 and insert it into the yarn splicing hole 23 as indicated by the broken line YP1.

That is, the yarn ends YP1 and PB1 intersect Q at two locations: inside the yarn splicing hole 23 and outside the yarn splicing unit.

(c) Yarn end clamping process After the yarn end is inserted into the yarn joining hole 23, that is, when the crossing lever 50 returns to the position shown in FIG. , 72 direction around the shafts 67, 68, and the clamp pieces 59, 60 also slide in the same direction following the clamp levers 55, 56,
As shown in FIG. 18, the package side yarn end YP is clamped between the clamp guide 57 and the clamp piece 59, and the clamp guide 58 and the clamp piece 60
In between, the side yarn end YB of the tube yarn is clamped.

(d) Yarn end cutting process Next, the yarn cutting devices 1 on both sides of the yarn splicing unit
7 and 18 are activated.

That is, in FIG. 5, a cam plate 86 fixed to a cam shaft 118 of a cylinder cam causes a movable blade 79 to rotate clockwise around a shaft 87 via a cam follower 84 and a cam lever 85, and is guided from the thread joining hole 23. The package side yarn end YP leading to the suction mouth 9 is cut through the groove 28 between the plates 25 and 26.

At the same time, the cutting device on the opposite side of the yarn splicing unit is activated to cut the yarn end on the tube yarn side.

The state at the moment the thread is cut is shown in FIG.
At this time, the free yarn ends YP2, YB2 at the tips from the clamp position are sucked into the yarn end control nozzles 14, 15 on both sides of the yarn joining hole 23.

That is, the yarn end YB2 goes to the nozzle 14, and the yarn end YP2 goes to the nozzle 14.
is sucked into the nozzle 15. (FIG. 19) (E) Yarn end untwisting process The yarn ends sucked into the yarn end control nozzles 14 and 15 are untwisted into a state suitable for splicing by the air flow ejected from the nozzles.

That is, in FIG. 7, if the twist direction of the yarn end YP2 sucked into the control nozzle 15 is S twist, the air flow injected from the jet hole 46 will be in the Z direction. The position of the ejection hole 46 is adjusted in advance so that

In addition, since the opening position of the jet hole 46 in the depth direction of the nozzle hole 45 affects the length of the yarn end to be untwisted,
An appropriate opening position is determined by taking into consideration the degree of overlap of both yarn ends within the yarn splicing hole, which results from mechanical constraints of the yarn splicing unit.

Therefore, the sleeve 47 in the control nozzle 14, 15
is advantageously mounted so that it can be moved longitudinally or rotatably circumferentially.

(f) Thread tensioning and thread pressing process When the untwisting of the thread ends is completed, the clamp levers 55 and 56 move further outwards and separate from the clamp pieces 59 and 60, as shown in Fig. 20.
The yarn ends in the control nozzles 14 and 15 are pulled out, and the length of the overlapping portion of the yarn ends passing through the yarn splicing hole 23 together with the yarn presser 21 is adjusted.

That is, the cam groove 9 of the cylinder cam 75 shown in FIG.
The cam followers 73, 74 of the clamp levers are located at 9b, 101b, and the side edges 55a, 56a of the clamp levers 55, 56 abut against the eccentric cams 76, 77 shown in FIG. 10, thereby positioning the clamp levers. The amount of yarn end drawn out is determined.

Therefore, the width S of the cam grooves 99b, 101b is set so that the side walls 99b, 101b of the cam grooves 99, 101 in FIG. provided.

At the same time as or before and after the thread tensioning described above, the thread presser lever 90 is moved to the standby position 90 indicated by the two-dot chain line as shown in FIG.
Turn from a to the solid line position 90 and hold the yarn end at a certain length from the tip.

This operation occurs when the roller 119 at the lower end of the L-shaped lever 95 in FIG. The spring-biased thread presser lever 90 is also lowered by lowering the collar portion 97 that is integrated with the presser lever 90 that is biased.
moves to the state shown in FIG.

This state is shown in FIGS. 21 and 22.

That is, the presser plate 91 of the yarn presser plates 91 and 92 presses and grips the yarn YP on the package side onto the top plate 42 of the yarn splicing unit.

In this embodiment, the unique twist of the yarn to be spliced is Z twist, and the swirling air flow in the yarn splicing hole is in the S direction.

On the other hand, the yarn YB connected to the pipe yarn balloons in the direction of twisting due to the swirling flow in the yarn splicing hole 23, so there is no need to hold it. In addition, the thread held by the thread presser plate 91 is only the thread YP on the side connected to the package cage.
The yarn end YB2 between the yarn splicing hole 23 and the control nozzle 14 is not gripped, and is almost in a free state as it is slightly positioned through the gap between the lower surface of the presser plate 91 and the top plate 42, and the yarn splicing operation is performed. Promotes entanglement of thread ends.

(g) Yarn splicing process After passing through each of the above steps, the yarn end YP on the package side and the yarn end YB on the tube yarn side inserted into the yarn splicing hole 23 are attached to both sides of the yarn splicing hole shown in Figs. Control plates 36, 37 and thread press plates 91, 92 provided on the sides
The slit 24 opening of the yarn splicing hole 23 is placed at a position substantially opposite to the opening of the slit 24 and in contact with the inner circumferential surface of the yarn splicing hole, and in this state, compressed air is supplied from the compressed air jet hole 43 to the yarn splicing hole. It is ejected into the hole 23.

The ejected airflow becomes a swirling flow along the inner circumferential surface of the yarn joining hole 23, swirling along with each yarn end YP, YB,
As the fibers at the untwisted yarn ends intermingle and become entangled, and as they balloon, the integrated yarn ends are twisted, and the tips of both yarn ends, which are in a free state, become entwined with each other's yarns. , a thread-like seam is formed.

Note that both yarn ends set in the yarn splicing hole intersect, and this crossing prevents the yarn ends from separating during initial air jetting.

Therefore, from the relationship between yarn twist and swirling airflow, there is a slight difference in the initial entanglement of both yarn ends depending on whether the end of the tube side yarn is crossed over the end of the package side yarn or vice versa. It is also conceivable that this may occur.

Therefore, from this point of view, the shape and operation order of the crossing levers in the yarn end crossing introduction step described above are also set appropriately.

(H) Loose removal and seam checking process Once the yarn splicing is completed through the steps (A) to (G) above,
Thread presser plates 91, 92 and clamp lever 55,
56 returns to its original position, ie, to the position shown in the fourth figure.

At this time, the spliced yarn is in the form of a loop that intersects outside the yarn splicing unit 8, as shown in Fig. 16, and when the yarn guide 12 returns to its original position, the looped yarn may become slack and cause fraying. . Also, check the seams on the guide plates 106 and 1 of the thread guide 12.
When threading a thread through the detector 105 provided between the two threads, if a slack thread enters the thread, it may be detected as a double thread.

For this reason, after the yarn splicing is completed, air is injected onto the yarn YR from the fluff removing nozzle 104 to form a loop YR along the side surface of the guide plate 107 as shown in FIG. 15.

Due to this air jet, the yarn in the yarn splicing hole 23 flies out from the slit 24, and the intersecting portion Q1 of the yarn disappears.

When the thread starts running in the state shown in Fig. 15, the detector 1
The thread passing through 05 is under tension and the thread seam can be checked accurately.

Furthermore, the yarn shifting guide 12 returns to the position shown in FIG. 1, the guide bar 11 sinks downward, the yarn splicing to the winding unit 1 is completed, and the unit 1 starts traveling again.

Through the steps (a) to (h) above, knotless thread piecing is performed.

As described above, the present invention includes a mechanism for introducing the package side yarn end and the tube side yarn end into the yarn joining hole in a crossing manner, a mechanism for clamping a position at an appropriate length from the tip of each yarn end, and the clamping position. a mechanism for cutting a fixed length position in a direction from the yarn end toward the tip; a mechanism for sucking each cut yarn end into a yarn end control nozzle and untwisting it;
It consists of a mechanism that pulls out the untwisted yarn ends from the nozzle and overlaps them in the yarn splicing hole, and a mechanism that applies a jet of fluid to the overlapping yarn ends of the yarn splicing hole. Since two yarn ends that are guided on both sides of the hole in a direction substantially perpendicular to the axial direction of the yarn splicing hole can be inserted into the yarn splicing hole in a crossing manner, even in winders where the winding unit circulates, etc. Yarn splicing is possible simply by positioning both yarn ends pulled out from the package and the pipe yarn near the yarn splicing unit, there is no need to provide a yarn splicing device in each winding unit, and the yarn ends on the package side can be suctioned. The yarn can be introduced into the yarn splicing hole without the need to cross the suction mouth or the relay pipe that suctions the side yarn end of the yarn, and can be easily applied to a winder having a conventional mechanical yarn knotter.

Furthermore, since both yarn ends intersect within the yarn splicing hole, there is no fear that the two yarn ends will separate if the jetting fluid is jetted to the crossing point, which facilitates the entanglement of both yarn ends at the initial stage of the yarn splicing operation. It is also possible to obtain a good seam.
In addition, with this invention, even if the yarn ends are pulled together with their ends facing in the same direction, by inserting them into the yarn splicing hole so that they cross each other, the ends of the yarn end will face in the opposite direction, and the seam will This prevents the seams from becoming thicker, resulting in a seam with a good appearance. That is, it is effective as a yarn splicing device for a winder in which when the package side yarn end and the tube yarn side yarn end are pulled out, the tips of the yarn ends are in the same direction.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing the positional relationship of the winding unit, thread splicing unit, thread guide, etc., Fig. 2 is a front view of the same, Fig. 3 is a plan view of the thread splicing unit, and Fig. 4 is the same front view. Figure 5 is a left side view of Figure 4,
FIG. 6 is a sectional view of the yarn splicing block, FIG. 7 is a sectional view of the yarn end control nozzle, FIGS. 8 and 9 are front views showing the operation of the crossing lever, and FIG. 10 is the configuration of the clamping device. A front view showing the operation, FIG. 11 is a plan view of the thread presser, FIG. 12 is a side view of the same, and FIG.
The figure is a front view of the cylinder cam, Figure 14 is a developed view of the cam, Figure 15 is a side view showing the positional relationship of the burr removal nozzle, Figure 16 is a front view of the cylinder cam, and Figure 17 is a yarn splicing preparation process. A front view showing the yarn splicing unit attached to the winder, showing the path; FIG. 18 is a front view showing the yarn path in the yarn end crossing introduction process and the clamp cutting process; FIG. 19 is a front view showing the yarn path in the yarn end untwisting process. FIG. 20 is a front view showing the yarn path in the yarn splicing process, FIG. 21 is a left side sectional view of FIG. 20 showing the relationship between the yarn presser plate and the yarn end in the same process, and FIG. FIG. 8... Yarn splicing unit, 13... Yarn splicing block, 14, 15... Yarn end control nozzle, 16... Yarn end crossing introduction device, 17, 18... Yarn cutting device, 1
9, 20... Thread clamp device, 21... Yarn presser, 23... Thread joining hole, YP... Yarn end on package cage side,
YB...Tube yarn side yarn end.

Claims (1)

[Scope of utility model registration request] In the yarn splicing device of an automatic winder in which the winding unit moves along a circular locus and has a yarn splicing device fixed in position outside the circular locus, the yarn end on the package side and the yarn end on the tube yarn side are connected to each other. A yarn guide mechanism for a package and a pipe yarn that positions and guides the yarn in a direction perpendicular to the axial direction of the yarn splicing hole of a yarn splicing unit having a splicing hole and substantially parallel to both sides of the yarn splicing hole; a yarn crossing introduction mechanism for introducing the two yarns into the yarn joining hole through the slit of the yarn joining hole while crossing them; a clamping mechanism for clamping a position at an appropriate length from the tip of each yarn end; A yarn end cutting mechanism that cuts a fixed length position in a direction toward the tip of the yarn end; a yarn end untwisting mechanism that inserts each cut yarn end into a yarn end control nozzle and untwists it; a yarn pulling mechanism that pulls out the yarn ends from the yarn end control nozzle and overlaps them in the yarn joining hole;
A yarn splicing device for a recirculating automatic winder, comprising a compressed air injection mechanism that applies a compressed air flow to both yarn end portions that are crossed and overlapped in a yarn splicing hole.