JP2022161459A - Yarn splicing nozzle and winding device - Google Patents

Abstract

To provide a yarn splicing nozzle and a winding device capable of coping with various kinds of yarn.SOLUTION: A yarn splicing nozzle 100 splices yarn by injection of compressed air. The yarn splicing nozzle 100 comprises: a nozzle body 110; an upstream side yarn splicing chamber 113U and a downstream side yarn splicing chamber 113D formed on the nozzle body 110, vertically communicated with each other and having planar flat walls 114U, 114D at a part of an inner wall; a first upstream side injection hole HU1 and a second upstream side injection hole HU2 formed on the nozzle body 110 and injecting compressed air toward the upstream side yarn splicing chamber 113U; and a first downstream side injection hole HD1 and a second downstream side injection hole HD2 formed on the nozzle body 110 and injecting compressed air toward the downstream yarn splicing chamber 113D. The first upstream side injection hole HU1 injects compressed air along the flat wall 114U, and the first downstream side injection hole HD1 injects compressed air along the flat wall 114D.SELECTED DRAWING: Figure 5

Description

The present invention relates to a splicing nozzle and a winding device.

A splicer nozzle described in Patent Document 1, for example, is known as a technology related to a splicing nozzle. A splicer nozzle described in Patent Document 1 is formed with a yarn splicing chamber that accommodates two yarn ends and that splices yarns. A fluid injection passage for injecting compressed air into the yarn tying chamber opens on the inner wall surface of the yarn tying chamber. A planar portion is formed on the inner wall surface of the splicing chamber against which the jetted compressed air directly collides.

Japanese Unexamined Patent Application Publication No. 2010-30705

In the above-described yarn splicing device, the strength of the joint may be insufficient depending on the type of yarn to be spliced, for example. Therefore, in recent years, there has been a demand for the development of a yarn splicing device that can handle various yarns.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a splicing nozzle and a winding device that can handle various types of yarns.

A yarn splicing nozzle according to the present invention is a yarn splicing nozzle that splices yarns by jetting compressed air. and a first upstream injection hole and a second upstream injection hole formed in the nozzle body for injecting compressed air toward the upstream yarn joining chamber. and a first downstream injection hole and a second downstream injection hole formed in the nozzle body for injecting compressed air toward the downstream yarn joining chamber, wherein the first upstream injection hole is provided for the upstream yarn Compressed air is injected along the flat wall of the splicing chamber, and the first downstream injection hole injects compressed air along the flat wall of the downstream yarn splicing chamber.

In this splicing nozzle, the first upstream injection hole injects compressed air along the flat wall of the upstream splicing chamber. The two threads forming the seam are flowed along the flat wall by the flow of compressed air and rebounded in an aligned state, and approach the first upstream injection hole. The two threads approaching the first upstream injection hole are again swung along the flat wall and bounced back, repeating this process. The same applies to the first downstream injection holes. As a result, two threads can be effectively intertwined to form a seam, and even when various threads are spliced, the strength of the seam can be made sufficient. It is possible to correspond to various yarns.

In the yarn splicing nozzle according to the present invention, the flat wall of the upstream yarn splicing chamber is inclined by 15° to 30° with respect to the direction of compressed air injection from the first upstream injection hole when viewed from the yarn traveling direction. When viewed from the yarn running direction, the planar wall of the downstream yarn joining chamber may be provided so as to be inclined by 15° to 30° with respect to the direction of compressed air injection from the first downstream injection hole. . In this case, by injecting compressed air from the first upstream injection hole and the first downstream injection hole, the two threads can be more effectively entangled to form a seam.

In the yarn splicing nozzle according to the present invention, the flat wall of the upstream yarn splicing chamber is inclined by 20° to 25° with respect to the direction of compressed air injection from the first upstream injection hole when viewed from the yarn traveling direction. When viewed from the yarn traveling direction, the planar wall of the downstream yarn joining chamber may be provided so as to be inclined by 20° to 25° with respect to the direction of compressed air injection from the first downstream injection hole. . In this case, by injecting compressed air from the first upstream side injection hole and the first downstream side injection hole, the two threads can be more effectively entangled to form a seam.

In the yarn splicing nozzle according to the present invention, the boundary line formed between the flat wall and the rest on the inner wall of the upstream yarn splicing chamber is configured to be continuous with at least a part of the edge of the first upstream injection hole, A boundary line formed between the flat wall and the rest of the inner wall of the downstream yarn joining chamber may be configured to be continuous with at least a portion of the edge of the first downstream injection hole. With such a configuration, it is possible to concretely realize one mode that exhibits the above effects that can be applied to various yarns. In addition, since the air injected from the first upstream injection hole and the first downstream injection hole flows continuously along the plane wall, the air flow is less likely to be disturbed and the action on the yarn is not disturbed.

In the yarn splicing nozzle according to the present invention, the first upstream injection hole and the first downstream injection hole exhibit a circular shape, and the boundary line of the inner wall of the upstream yarn joining chamber is the circular shape of the first upstream injection hole. The boundary line of the inner wall of the downstream yarn splicing chamber may be configured to overlap the circular tangent line of the first downstream injection hole. With such a configuration, it is possible to concretely realize one mode that exhibits the above effects that can be applied to various yarns.

In the yarn splicing nozzle according to the present invention, the first upstream injection hole and the first downstream injection hole have a polygonal shape, and the boundary line of the inner wall of the upstream yarn joining chamber is the polygon of the first upstream injection hole. It may be configured so as to overlap with one side of the shape, and the boundary line of the inner wall of the downstream yarn splicing chamber may be configured to overlap with one side of the polygonal shape of the first downstream injection hole. With such a configuration, it is possible to concretely realize one mode that exhibits the above effects that can be applied to various yarns.

In the yarn splicing nozzle according to the present invention, the inner surface of the first upstream injection hole is configured to be continuous with the flat wall of the upstream yarn joining chamber, and the inner surface of the first downstream injection hole is configured to be continuous with the flat wall of the downstream yarn joining chamber. It may be configured to be continuous with. With such a configuration, it is possible to concretely realize one mode that exhibits the above effects that can be applied to various yarns.

In the yarn joining nozzle according to the present invention, the upstream yarn joining chamber and the downstream yarn joining chamber are arranged so that their centers are separated from each other in a predetermined direction when viewed from the yarn running direction, and when viewed from the yarn running direction, The compressed air injection directions of the first upstream injection hole and the first downstream injection hole may be along a predetermined direction and opposite to each other. As a result, when viewed from the yarn running direction, the first upstream side injection hole and the first downstream side injection hole can be configured symmetrically in the predetermined direction.

In the yarn joining nozzle according to the present invention, each of the upstream yarn joining chamber and the downstream yarn joining chamber has an arc-shaped curved surface wall when viewed from the yarn running direction on a part of the inner wall, and the second upstream injection nozzle The hole injects compressed air along the tangential direction of the curved wall of the upstream yarn joining chamber as seen from the yarn traveling direction, and the second downstream injection hole is the downstream yarn joining chamber as seen from the yarn traveling direction. Compressed air may be injected along the tangential direction of the curved wall of the . In this case, the compressed air injected along the tangential direction from the second upstream side injection hole and the second downstream side injection hole mainly transmits the rotational force to the yarn, and the fibers at the yarn ends of the two yarns are displaced. can be wrapped effectively. As a result, even when splicing various yarns, the strength of the joint can be made sufficient.

In the yarn splicing nozzle according to the present invention, the nozzle body is provided with a groove portion extending in the yarn traveling direction, the bottom side of which communicates with the upstream yarn joining chamber and the downstream yarn joining chamber. The downstream injection hole may open on the bottom side of the groove. In this case, in the structure provided with the grooves, the compressed air from the second upstream injection hole and the second downstream injection hole is used to ensure that the yarn escapes from the upstream yarn joining chamber and the downstream yarn joining chamber through the groove. can be suppressed by injection of

In the yarn joining nozzle according to the present invention, the flat wall of the upstream yarn joining chamber is provided closer to the groove than the center of the upstream yarn joining chamber when viewed from the yarn running direction, and is located at the downstream side when viewed from the yarn running direction. The planar wall of the yarn splicing chamber may be provided closer to the groove than the center of the downstream yarn splicing chamber. With such a configuration, it is possible to concretely realize one mode that exhibits the above effects that can be applied to various yarns. It is also possible to prevent the yarn from jumping out of the groove to the outside of the yarn splicing nozzle.

In the yarn splicing nozzle according to the present invention, the second upstream injection hole and the second downstream injection hole are positioned between the first upstream injection hole and the first downstream injection hole in the yarn traveling direction. good too. In this case, compared to the case where the first upstream injection hole and the first downstream injection hole are positioned between the second upstream injection hole and the second downstream injection hole in the yarn traveling direction, the yarn is It is possible to prevent the yarn from coming out of the splicing chamber and the downstream side splicing chamber.

A winding device according to the present invention includes the splicing nozzle described above, a support that supports the splicing nozzle, and a controller that controls injection of compressed air from the splicing nozzle. Also in this yarn splicing device, the splicing nozzle described above provides the above-described effect, that is, the effect of being able to handle various yarns.

A winding device according to the present invention is a winding device having a control mode for joining yarns of a first yarn type and a second yarn type, wherein a control unit includes a first upstream injection hole and a first downstream injection hole. Injection of compressed air from the holes is started, injection of compressed air from the second upstream injection hole and the second downstream injection hole is started, compression from the first upstream injection hole and the first downstream injection hole It may be configured to be capable of executing a control mode in which the injection of air and the injection of compressed air from the second upstream side injection hole and the second downstream side injection hole are stopped at the same time. In this case, the first thread type and the second thread type can be handled.

A winding device according to the present invention is a winding device having a control mode for splicing a yarn of a third yarn type, wherein the control unit controls the flow of compressed air from the first upstream injection hole and the first downstream injection hole. to start injection of compressed air from the second upstream injection hole and the second downstream injection hole, and stop injection of compressed air from the first upstream injection hole and the first downstream injection hole to restart injection of compressed air from the first upstream injection hole and the first downstream injection hole, stop injection of compressed air from the second upstream injection hole and the second downstream injection hole, and A control mode for stopping injection of compressed air from the first upstream injection hole and the first downstream injection hole may be executed. In this case, the third thread type can be handled.

A winding device according to the present invention is a winding device having a control mode for splicing a yarn of a fourth yarn type, wherein the control unit controls the flow of compressed air from the second upstream injection hole and the second downstream injection hole. to start injection of compressed air from the first upstream injection hole and the first downstream injection hole, and stop injection of compressed air from the second upstream injection hole and the second downstream injection hole to start injection of compressed air from the second upstream injection hole and the second downstream injection hole again, stop injection of compressed air from the first upstream injection hole and the first downstream injection hole, and A control mode for stopping injection of compressed air from the second upstream injection hole and the second downstream injection hole may be executable. In this case, the fourth thread type can be handled.

A winding device according to the present invention is a winding device having a control mode for splicing a yarn of a fifth yarn type, and is provided with a yarn shrinkage suppression lever that grips the fifth yarn type by sandwiching it with a support. , the control unit starts to inject compressed air from the first upstream injection hole and the first downstream injection hole in a state where the fifth yarn type is gripped by the yarn shrinkage suppression lever, In a state in which injection of compressed air from the side injection hole and the first downstream injection hole is stopped and the grip of the yarn shrinkage suppression lever is released, the compressed air is injected from the first upstream injection hole and the first downstream injection hole. After starting injection of compressed air from the second upstream injection hole and the second downstream injection hole, injection of compressed air from the first upstream injection hole and the first downstream injection hole and injection of compressed air from the second upstream injection hole and the second downstream injection hole at the same time. In this case, the fifth thread type can be handled.

A winding device according to the present invention is a winding device having a control mode for splicing a yarn of a sixth yarn type, wherein the control unit controls the flow of compressed air from the first upstream injection hole and the first downstream injection hole. to start injection, stop injection of compressed air from the first upstream injection hole and the first downstream injection hole, and start injection of compressed air from the second upstream injection hole and the second downstream injection hole and stop injection of compressed air from the second upstream side injection hole and the second downstream side injection hole. In this case, the sixth thread type can be handled.

The winding device according to the present invention includes a pressure adjustment unit that adjusts the injection pressure from at least one of the first upstream injection hole, the second upstream injection hole, the first downstream injection hole, and the second downstream injection hole. may be provided. In this case, the entanglement of the two threads can be controlled by the pressure adjustment section, for example, according to the thread type of the threads.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the yarn joining nozzle and winding device which can respond to various yarns.

1 is a front view showing an automatic winder according to an embodiment; FIG. FIG. 2 is a side view showing the winder unit according to the embodiment; FIG. 3 is a front view showing the yarn splicing device according to the embodiment. FIG. 4(a) is a perspective view showing the front side of the splicing section according to the embodiment. FIG. 4(b) is a perspective view showing the rear side of the splicing section according to the embodiment. FIG. 5 is a partial cross-sectional view along AA in FIG. 4(a) of the splicing nozzle according to the embodiment. FIG. 6 is a diagram showing a schematic configuration of a yarn splicing device according to the embodiment. FIG. 7 is an enlarged cross-sectional view of the splicing nozzle according to the embodiment taken along line CC in FIG. FIG. 8 is a cross-sectional view corresponding to FIG. 7 for explaining ejection of compressed air from the first upstream injection hole. FIG. 9 is a cross-sectional view corresponding to FIG. 7 illustrating ejection of compressed air from the second upstream injection hole. FIG. 10(a) is a diagram showing an example of compressed air injection timing conditions when performing piecing of combed cotton yarn. FIG. 10(b) is a diagram showing an example of compressed air injection timing conditions when splicing polyester yarns. FIG. 11A is a diagram showing an example of compressed air injection timing conditions when joining acrylic yarns. FIG. 11(b) is a diagram showing an example of compressed air injection timing conditions when splicing worsted yarns. FIG. 12(a) is a diagram showing an example of compressed air injection timing conditions when splicing core yarn yarns. FIG. 12(b) is a diagram showing an example of compressed air injection timing conditions when splicing lyocell fiber yarns.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and overlapping descriptions are omitted.

As shown in FIG. 1 , the automatic winder 1 includes a plurality of winder units 3 arranged side by side, a machine base control device 5 and a doffing device 7 . The machine control device 5 can communicate with a plurality of winder units (winding devices) 3 . An operator of the automatic winder 1 can collectively manage a plurality of winder units 3 by appropriately operating the machine control device 5 . Each winder unit 3 forms a package P by unwinding the yarn Y from the yarn supplying bobbin SB and winding the yarn Y on the winding bobbin WB while traversing it. The doffing device 7 travels to the position of the winder unit 3 when the package P is fully wound in each winder unit 3 (a state in which a specified amount of yarn is wound), and removes the full package. , set an empty winding bobbin WB.

As shown in FIG. 2, the winder unit 3 includes a unit control section 10, a yarn feeding device 12, and a winding device . The unit control section 10 includes, for example, a CPU (Central Processing Unit) and a ROM (Read Only Memory). A program for controlling each component of the winder unit 3 is stored in the ROM. The CPU executes programs stored in the ROM.

The yarn supplying device 12 supports the yarn supplying bobbin SB placed on a transport tray (not shown) at a predetermined position. The yarn supplying device 12 unwinds the yarn Y from the yarn supplying bobbin SB and pulls out the yarn Y from the yarn supplying bobbin SB. The yarn supplying device 12 supplies the yarn Y. The yarn feeding device 12 is not limited to a transport tray type device, and may be, for example, a magazine type device.

The winding device 14 comprises a cradle 16 and a winding drum 18 . The cradle 16 rotatably supports the winding bobbin WB (or package P) by sandwiching the winding bobbin WB. The winding drum 18 traverses the yarn Y on the surface of the package P and rotates the package P. The winding drum 18 is rotationally driven by a drum driving motor (not shown). By rotating the winding drum 18 while the outer periphery of the package P is in contact with the winding drum 18, the package P is driven to rotate. A spiral traverse groove is formed on the outer peripheral surface of the winding drum 18 . The yarn Y unwound from the yarn supplying bobbin SB is wound on the surface of the package P while being traversed by the traversing groove with a constant width. Thereby, a package P having a constant winding width can be formed.

Each winder unit 3 includes, in the yarn path between the yarn supplying device 12 and the winding device 14, an unwinding auxiliary device 20, a tension applying device 22, a tension detecting device 24, and a tension applying device 22 in order from the yarn feeding device 12 side. A yarn splicing device 26 and a yarn monitoring device 28 are provided. A first catching and guiding device 30 and a second catching and guiding device 32 are arranged near the yarn splicing device 26 .

The unwinding assist device 20 prevents the yarn Y unwound from the yarn supplying bobbin SB from being excessively swung around by centrifugal force, and assists in unwinding the yarn Y from the yarn supplying bobbin SB appropriately. The tension applying device 22 applies a predetermined tension to the running yarn Y. As shown in FIG. In this embodiment, the tensioning device 22 is a gate-type device in which movable comb teeth are arranged with respect to fixed comb teeth. The tension detection device 24 detects the tension of the running yarn Y between the yarn feeding device 12 and the winding device 14 . When the yarn Y is cut between the yarn supplying device 12 and the winding device 14 for some reason, the yarn joining device 26 separates the yarn Y on the yarn supplying device 12 side and the yarn Y on the winding device 14 side. and spliced.

The yarn monitoring device 28 monitors the state of the yarn Y running on the yarn path, and detects the presence or absence of yarn defects based on the monitored information. The yarn defect includes at least one of, for example, an abnormal thickness of the yarn Y, a foreign substance contained in the yarn Y, and a broken yarn. The first catching and guiding device 30 can turn from a standby position on the yarn feeding device 12 side to a catching position on the winding device 14 side. The first catching and guiding device 30 catches the yarn Y at the catching position and guides it to the yarn joining device 26 . The second catching and guiding device 32 can turn from a standby position on the yarn feeding device 12 side to a catching position on the winding device 14 side. The second catching and guiding device 32 catches the yarn Y at the supplementary position and guides it to the yarn joining device 26 .

Next, the yarn splicing device 26 described above will be described in more detail.

FIG. 3 is a front view showing the splicing device 26. FIG. In the following description, for convenience, the side of the winding device 14 is called the downstream side, the side of the yarn feeding device 12 is called the upstream side, and the running path (yarn path) side of the yarn Y with respect to the yarn splicing device 26 is called the front side. The opposite side is called the rear side. A direction orthogonal to the up-down direction and the front-rear direction is referred to as the left-right direction. Further, the yarn end of the yarn Y on the yarn supplying device 12 side is called a first yarn end, and the yarn end of the yarn Y on the winding device 14 side is called a second yarn end.

As shown in FIG. 3, the yarn splicing device 26 includes a front plate (support) 90, an untwisting section 40 including a first untwisting pipe member 41A and a second untwisting pipe member 41B, and a jet of compressed air. a pair of yarn pulling levers (not shown) that can rotate so as to sandwich the untwisting portion 40; and a yarn joining portion 50 that can rotate so as to sandwich A yarn presser member 80 including first and second yarn presser levers 82 and 83; and a control unit 96 (see FIG. 6) that controls injection of compressed air in the joint portion 50 .

The front plate 90 has a plate shape whose thickness direction is the front-rear direction. A front surface 90a of the front plate 90 has a planar shape along the yarn running direction. A yarn splicing portion 50 is provided on the front surface 90 a of the front plate 90 . The front plate 90 supports the splicing section 50 . On the front surface 90 a of the front plate 90 , a first yarn end introduction port that is an opening of the first untwisting pipe member 41 A is provided downstream of the yarn joining portion 50 , and a second untwisting pipe member 41 A is provided upstream of the yarn joining portion 50 . A second yarn end introduction port is provided as an opening of the twisted pipe member 41B.

On the front surface 90a of the front plate 90, a first guide portion 45A is provided on the downstream side of the first untwisting pipe member 41A, and a second guide portion 45B is provided on the upstream side of the second untwisting pipe member 41B. there is The first and second guide portions 45A and 45B are arranged to face each other with the splicing portion 50 interposed therebetween. The first and second guide portions 45A, 45B guide the yarn Y guided by the first and second catching and guiding devices 30, 32, respectively.

The first untwisting pipe member 41A takes in and untwists the first yarn end by the action of compressed air. The second untwisting pipe member 41B takes in and untwists the second yarn end by the action of compressed air. The yarn joining section 50 twists together the first yarn end untwisted by the first untwisting pipe member 41A and the second yarn end untwisted by the second untwisting pipe member 41B by the action of compressed air. inherit. When the yarn ends are twisted together at the yarn joining section 50, the first and second yarn ends are held by a clamp (not shown) and moved to the first and second untwisting pipes by a yarn pulling lever (not shown). The yarn is pulled out from the members 41A and 41B and pressed in the vicinity of the yarn splicing portion 50 by the first and second yarn presser levers 82 and 83. As shown in FIG.

The thread pressing member 80 is connected to a drive source (not shown) such as a stepping motor through a cam link mechanism 95 . The thread pressing member 80 is provided so as to be movable toward and away from the front surface 90a of the front plate 90 by the driving force of the driving source. That is, the first and second thread presser levers 82 and 83 of the thread presser member 80 are turned (rotated) by the driving force of the drive source such that the tip end side approaches and separates from the front surface 90a of the front plate 90 . The thread pressing member 80 contacts the front surface 90a of the front plate 90 to press the first and second thread ends in cooperation with the front surface 90a. The first and second thread presser levers 82 and 83 may be urged toward the front plate 90 at their distal end sides by, for example, a torsion coil spring (not shown).

A pair of hold-down levers 85 are arranged vertically with the yarn splicing portion 50 interposed therebetween. The pair of pressing levers 85 integrally swing around a vertically extending shaft 86 . The hold-down lever 85 is swung until it comes into contact with the front surface 90a of the front plate 90, and pinches the yarn Y between itself and the front plate 90 with an appropriate gripping force.

The nozzle guide 94 is a member that guides the compressed air jetted at the yarn splicing section 50 . The nozzle guide 94 is used for the purpose of controlling the direction of the jetted compressed air and the purpose of stabilizing the position holding of the two yarns Y to be spliced. The nozzle guide 94 has a plate shape. The nozzle guide 94 is fixed to the upper and lower sides of the spliced portion 50 via spacers 94S. The nozzle guide 94 serves as a part of an upstream side opening of an upstream side yarn joining chamber 113U in the yarn joining section 50 and a part of a downstream side opening of a downstream side yarn joining chamber 113D in the yarn joining section 50. , is provided to block the The ends of the nozzle guide 94 closing the openings of the upstream yarn joining chamber 113U and the downstream yarn joining chamber 113D are not chamfered on both the upper surface and the rear surface, and have corners.

In the yarn splicing device 26 configured as described above, first, the first and second yarn pulling levers (not shown) and the first and second yarn holding levers 82 turn toward the front plate 90 side. As a result, the yarn Y on the downstream side and the yarn Y on the upstream side guided by the first and second catching and guiding devices 30 and 32 are drawn toward the untwisting section 40 side. These yarns Y are held by a clamp and cut by a cutter in this state. The first yarn end is fed into the first untwisting pipe member 41A, and the second yarn end is fed into the second untwisting pipe member 41B. At this time, by gripping the yarn Y between the pressing lever 85 and the front plate 90, shrinkage of the yarn Y when the yarn Y is cut is suppressed. Injection of compressed air is started in the first and second untwisting pipe members 41A and 41B, and the first and second yarn ends are untwisted by the action of the compressed air.

Subsequently, the first and second thread pulling levers (not shown) are further turned. As a result, the first and second yarn ends are pulled out from the first and second untwisting pipe members 41A and 41B, respectively, and pulled out in the vicinity of the yarn splicing portion 50 by the first and second yarn pressing levers 82 and 83. be held down. The hold-down lever 85 is returned to the initial position to release the grip of the yarn Y by the hold-down lever 85 . Injection of compressed air is started at the yarn splicing portion 50, and the untwisted first and second yarn ends are twisted together by the action of the compressed air. Subsequently, the first and second thread pulling levers (not shown) and the first and second thread holding levers 82, 83 are turned in the opposite direction. Then, the holding of the yarn Y on the upper side and the yarn Y on the lower side by the clamp is released. As a result, the spliced yarn Y returns to the running path on the front side of the splicing device 26 .

FIG. 4(a) is a perspective view showing the front side of the splicing section 50. FIG. FIG. 4(b) is a perspective view showing the rear side of the splicing section 50. As shown in FIG. FIG. 5 is a partial cross-sectional view of the splicing nozzle 100 along AA in FIG. 4(a). FIG. 6 is a diagram showing a schematic configuration of the yarn splicing device 26. As shown in FIG. FIG. 6 includes a partial cross-sectional view of splicing nozzle 100 along BB in FIG. FIG. 7 is an enlarged cross-sectional view of the splicing nozzle 100 taken along line CC of FIG. The yarn splicing section 50 is a part that splices yarns by jetting compressed air, and includes a splicing nozzle 100 and a support block 120 .

As shown in FIGS. 4(a), 4(b) and 5, the splicing nozzle 100 is fixed with respect to the support block 120. As shown in FIG. The splicing nozzle 100 is a splicing nozzle that splices yarns by jetting compressed air. The yarn splicing nozzle 100 includes a nozzle body 110, which is a block body made of ceramic, for example, a slit (groove) 112 extending along the vertical direction, which is the direction in which the yarn runs, and a space where yarn splicing is performed by the action of compressed air. An upstream yarn joining chamber 113U and a downstream yarn joining chamber 113D, a first upstream injection hole HU1 and a second upstream injection hole HU2 for injecting compressed air toward the upstream yarn joining chamber 113U, and a downstream yarn A first downstream side injection hole HD1 and a second downstream side injection hole HD2 for injecting compressed air toward the joint chamber 113D are provided.

A V-groove 111 is formed on the front side of the nozzle body 110 so as to extend from the upper end to the lower end with a V-shaped cross section. The slit 112 is formed on the bottom side of the V-groove 111 in the nozzle body 110 . The slit 112 extends vertically from the upper end to the lower end of the nozzle body 110 . The bottom side (rear side) of the slit 112 communicates with the upstream yarn joining chamber 113U and the downstream yarn joining chamber 113D.

The upstream yarn splicing chamber 113U is provided upstream from the center of the yarn splicing nozzle 100 in the vertical direction, and is open to the upstream side. The downstream yarn splicing chamber 113D is provided downward from the vertical center of the yarn splicing nozzle 100 and opens to the downstream side. The upstream yarn joining chamber 113U and the downstream yarn joining chamber 113D are adjacent to each other in the vertical direction and communicate with each other at the center of the yarn joining nozzle 100 in the vertical direction. As seen from the vertical direction, the upstream yarn joining chamber 113U and the downstream yarn joining chamber 113D are arranged so that their centers are separated from each other in the horizontal direction (predetermined direction).

The upstream yarn splicing chamber 113U has a planar flat wall 114U and a curved curved wall 115U as part of the inner wall. The flat wall 114U is provided closer to the slit 112 than the center of the upstream yarn splicing chamber 113U when viewed in the vertical direction. The plane wall 114U has a linear shape that is inclined rearward with respect to the left-right direction as it goes inward in the left-right direction when viewed from the top-bottom direction. The curved wall 115U has an arc shape when viewed in the vertical direction. The curved wall 115U constitutes the inner wall of the upstream yarn splicing chamber 113U other than the flat wall 114U. The upstream yarn splicing chamber 113U, defined by the flat wall 114U and the curved wall 115U, has a partially circular shape with a front side and a left-right inner part missing when viewed from above and below.

The downstream yarn splicing chamber 113D has a flat wall 114D and a curved curved wall 115D in part of the inner wall. The flat wall 114D is provided closer to the slit 112 than the center of the downstream yarn splicing chamber 113D when viewed in the vertical direction. The plane wall 114D has a linear shape that is inclined rearward with respect to the left-right direction as it goes inward in the left-right direction when viewed from the top-bottom direction. The curved wall 115D has an arc shape when viewed from above and below. The curved wall 115D constitutes the inner wall of the downstream yarn splicing chamber 113D other than the flat wall 114D. A downstream yarn splicing chamber 113D defined by a flat wall 114D and a curved wall 115D has a partially circular shape in which a part of the front side and the inner side in the left-right direction is cut off when viewed from above and below.

As shown in FIGS. 5, 6 and 7, the nozzle body 110 is formed with a first passage 140U1 and a second passage 140U2 for supplying compressed air to the upstream yarn splicing chamber 113U. The first passage 140U1 is a through hole leading to the upstream yarn splicing chamber 113U. First passage 140U1 extends in the left-right direction. The second passage 140U2 is a through hole leading to the bottom side of the slit 112. As shown in FIG. Second passage 140U2 extends obliquely with respect to the left-right direction. The first passage 140U1 and the second passage 140U2 are aligned vertically when viewed from the front, and are positioned on one side of the yarn running path L in the left-right direction. The first passage 140U1 is located upstream of the second passage 140U2 when viewed from the front. The openings of the first passage 140U1 and the second passage 140U2 form a first upstream injection hole HU1 and a second upstream injection hole HU2. The cross-sectional shapes of the first passage 140U1 and the second passage 140U2 are rectangular.

Further, the nozzle body 110 is formed with a first passage 140D1 and a second passage 140D2 for supplying compressed air to the downstream yarn splicing chamber 113D. The first passage 140D1 is a through hole leading to the downstream yarn joining chamber 113D. The first passage 140D1 extends in the left-right direction. The second passage 140D2 is a through hole leading to the bottom side of the slit 112. As shown in FIG. The second passage 140D2 extends obliquely with respect to the left-right direction. The first passage 140D1 and the second passage 140D2 are arranged vertically when viewed from the front, and are positioned on the other side of the yarn running path L in the left-right direction. The first passage 140D1 is located downstream of the second passage 140D2 when viewed from the front. Openings of the first passage 140D1 and the second passage 140D2 form a first downstream injection hole HD1 and a second downstream injection hole HD2. The cross-sectional shapes of the first passage 140D1 and the second passage 140D2 are rectangular.

The first upstream injection hole HU1 and the second upstream injection hole HU2 are injection holes that are formed in the nozzle body 110 and that inject compressed air toward the upstream yarn splicing chamber 113U. The first upstream injection hole HU1 and the second upstream injection hole HU2 inject compressed air in the direction in which the second yarn end is twisted. The first upstream injection hole HU1 and the second upstream injection hole HU2 are positioned on one side in the left-right direction with respect to the yarn running path L when viewed from the front. The shapes of the first upstream injection hole HU1 and the second upstream injection hole HU2 are rectangular.

The first upstream injection hole HU1 injects compressed air along the flat wall 114U of the upstream yarn splicing chamber 113U. The first upstream injection hole HU1 opens into the upstream yarn joining chamber 113U. When viewed in the vertical direction, the flat wall 114U of the upstream yarn splicing chamber 113U is provided so as to be inclined by 15° to 30° with respect to the injection direction of the compressed air from the first upstream injection hole HU1. Specifically, the plane wall 114U is provided so as to be inclined by 20° to 25° with respect to the injection direction of the compressed air of the first upstream injection hole HU1 when viewed from the vertical direction. In the illustrated example, the flat wall 114U is provided so that the angle α with respect to the injection direction of the compressed air of the first upstream injection hole HU1 is 25°. 114 U of plane walls are provided so that it may continue in a row to the edge of 1st upstream injection hole HU1.

For example, the injection direction of the compressed air from the first upstream injection hole HU1 corresponds to the direction in which the first upstream injection hole HU1 faces. For example, the injection direction of the compressed air from the first upstream injection hole HU1 is the main direction of the streamline of the compressed air passing through the first upstream injection hole HU1. This is the same for the second upstream injection hole HU2, the first downstream injection hole HD1, and the second downstream injection hole HD2.

The second upstream injection hole HU<b>2 is provided on the bottom side of the slit 112 . The second upstream injection hole HU<b>2 opens on the bottom side of the slit 112 . The second upstream injection hole HU2 injects compressed air along the tangential direction of the curved wall 115U of the upstream yarn splicing chamber 113U when viewed from above. The second upstream injection hole HU2 injects compressed air from the bottom side of the slit 112 toward the edge of the upstream yarn joining chamber 113U.

The first downstream side injection hole HD1 and the second downstream side injection hole HD2 are formed in the nozzle body 110 and are injection holes that inject compressed air toward the downstream side yarn joining chamber 113D. The first downstream injection hole HD1 and the second downstream injection hole HD2 inject compressed air in the direction in which the first yarn end is twisted. The first downstream injection hole HD1 and the second downstream injection hole HD2 are positioned on the other side in the left-right direction with respect to the yarn travel path L when viewed from the front. The shape of the first downstream side injection hole HD1 and the second downstream side injection hole HD2 is a rectangular shape.

The first downstream injection hole HD1 injects compressed air along the flat wall 114D of the downstream yarn splicing chamber 113D. The first downstream injection hole HD1 opens into the downstream yarn joining chamber 113D. When viewed from above, the flat wall 114D of the downstream yarn splicing chamber 113D is provided so as to be inclined by 15° to 30° with respect to the injection direction of the compressed air of the first downstream injection hole HD1. Specifically, the plane wall 114D is provided so as to be inclined by 20° to 25° with respect to the injection direction of the compressed air of the first downstream side injection hole HD1 when viewed from the vertical direction. In the illustrated example, the flat wall 114D is provided so that the angle β with respect to the injection direction of the compressed air of the first downstream injection hole HD1 is 25°. The flat wall 114D is provided so as to continue to the edge of the first downstream side injection hole HD1.

The second downstream injection hole HD2 is provided on the bottom side of the slit 112 . The second downstream injection hole HD2 opens on the bottom side of the slit 112 . The second downstream injection hole HD2 injects compressed air along the tangential direction of the curved wall 115D of the downstream yarn splicing chamber 113D when viewed from above. The second downstream injection hole HD2 injects compressed air from the bottom side of the slit 112 toward the edge of the downstream yarn joining chamber 113D.

The injection directions of the compressed air from the first upstream side injection hole HU1 and the first downstream side injection hole HD1 are along the left-right direction and opposite to each other. In the vertical direction, the second upstream injection hole HU2 and the second downstream injection hole HD2 are positioned between the first upstream injection hole HU1 and the first downstream injection hole HD1 (see FIG. 6). In other words, in the vertical direction, the first upstream injection hole HU1 and the first downstream injection hole HD1 are arranged outside the nozzle body 110, and the second upstream injection hole HU2 and the second downstream injection hole are arranged inside the nozzle body 110. A side injection hole HD2 is arranged.

A boundary line formed between the flat wall 114U and the rest (the curved wall 115U) on the inner wall of the upstream yarn joining chamber 113U continues to at least a portion of the edge of the first upstream injection hole HU1. A boundary line formed between the flat wall 114D and the rest (the curved wall 115D) on the inner wall of the downstream yarn joining chamber 113D connects with at least a portion of the edge of the first downstream injection hole HD1. The boundary line of the inner wall of the upstream yarn splicing chamber 113U constitutes a corner (corner) formed where the flat wall 114U and the curved wall 115U meet. The boundary line of the inner wall of the downstream yarn splicing chamber 113D forms a corner (corner) formed where the flat wall 114D and the curved wall 115D meet. The boundary line of the inner wall of the upstream yarn joining chamber 113U overlaps with one side of the polygonal shape of the first upstream injection hole HU1. The boundary line of the inner wall of the downstream yarn joining chamber 113D overlaps with one side of the polygonal shape of the first downstream injection hole HD1. The inner surface of the first upstream injection hole HU1 is continuous with the flat wall 114U of the upstream yarn splicing chamber 113U. The inner surface of the first downstream injection hole HD1 is continuous with the flat wall 114D of the downstream yarn splicing chamber 113D.

Returning to FIGS. 3 and 4, the support block 120 is made of metal such as aluminum or resin, and has a substantially rectangular parallelepiped shape. The support block 120 is formed with a U-shaped opening 121 that accommodates the splicing nozzle 100 . The support block 120 is formed with a first block passage 125A and a second block passage 125B. The first block passage 125A is a passage for circulating compressed air from the outside of the support block 120 to the first passages 140U1 and 140D1 (see FIG. 6) of the splicing nozzle 100. As shown in FIG. The second block passage 125B is a passage for circulating compressed air from the outside of the support block 120 to the second passage 140U2 and the second passage 140D2 (see FIG. 6) of the splicing nozzle 100.

As shown in FIG. 6, the control unit 96 is a computer including a CPU, ROM, RAM, and the like. Various operations of the control unit 96 are controlled by, for example, loading a program stored in the ROM onto the RAM and executing the program by the CPU. The control unit 96 may be configured as hardware such as an electronic circuit. The control section 96 may be configured by part of the unit control section 10 (see FIG. 2). The control section 96 may be configured separately from the unit control section 10 .

The control section 96 controls injection of compressed air from the splicing nozzle 100 . Specifically, the control unit 96 controls the opening and closing of the first solenoid valve 161 provided in the first air flow path 151 that guides the compressed air to the first upstream side injection hole HU1 and the first downstream side injection hole HD1. . The first air flow path 151 is formed of, for example, a tube or the like, and communicates with the first block passage 125A. The control unit 96 controls opening and closing of a second electromagnetic valve 162 provided in the second air flow path 152 that guides the compressed air to the second upstream injection hole HU2 and the second downstream injection hole HD2. The second air flow path 152 is formed of, for example, a tube or the like, and communicates with the second block passage 125B. By controlling opening/closing of at least one of the first electromagnetic valve 161 and the second electromagnetic valve 162 by the control unit 96, the first upstream injection hole HU1, the second upstream injection hole HU2, and the first downstream injection hole HD1 are controlled. And the injection start timing and injection stop timing of the compressed air from the second downstream side injection hole HD2 can be changed.

The first air flow path 151 is provided with a first pressure regulating valve 171 that adjusts the injection pressure from the first upstream injection hole HU1 and the first downstream injection hole HD1. The second air flow path 152 is provided with a second pressure regulating valve 172 that adjusts the injection pressure from the second upstream injection hole HU2 and the second downstream injection hole HD2. That is, the yarn splicing device 26 includes the first pressure regulating valve 171 and the second pressure regulating valve 172 as pressure regulating units.

As described above, in the splicing nozzle 100, the first upstream injection hole HU1 injects compressed air along the flat wall 114U of the upstream splicing chamber 113U. As shown in FIG. 8, the two yarns Y, Y forming the seam are flowed together along the flat wall 114U by the flow of compressed air in the upstream yarn joining chamber 113U, collide and rebound. , approaches the first upstream injection hole HU1. The two threads Y, Y approaching the first upstream injection hole HU1 flow again along the flat wall 114U, collide and rebound, and are swung around repeatedly. As a result, the fibers of the two yarns Y, Y are entangled with each other to form a seam. The entanglement of the seam is formed by such behavior of the yarn Y in the upstream yarn joining chamber 113U. The compressed air from the first upstream injection hole HU1 has a factor of winding around the outer edge of the upstream yarn splicing chamber 113U, but mainly has a factor of entangling inside the upstream yarn splicing chamber 113U. , which contributes to seam strength. The same applies to the first downstream injection hole HD1. The seam strength in one aspect of the present invention is the maximum tensile strength measured until the yarn breaks in the yarn strength and elongation test described later.

Therefore, according to the yarn splicing nozzle 100, the two yarns Y, Y can be effectively entangled to form a joint. As a result, even when splicing various yarns Y, the strength of the joint can be made sufficient. Various yarns Y can be handled. One type of splicing nozzle 100 can handle any type of yarn. The shape of the joint can also be a beautiful shape that does not have so-called whiskers on both ends. It is possible to eliminate the need to apply heat or water to change the rigidity of the yarn Y at the time of yarn splicing to modify the yarn quality to be suitable for splicing.

In the yarn splicing nozzle 100, the flat wall 114U of the upstream yarn splicing chamber 113U is provided so as to be inclined by 15° to 30° with respect to the injection direction of the compressed air of the first upstream injection hole HU1 when viewed from above. It is When viewed from above, the flat wall 114D of the downstream yarn splicing chamber 113D is provided so as to be inclined by 15° to 30° with respect to the injection direction of the compressed air of the first downstream injection hole HD1. In this case, by injecting compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1, the two yarns Y, Y can be more effectively entangled to form a seam.

If the plane wall 114U is smaller than 15° with respect to the direction of compressed air injection from the first upstream injection hole HU1, the ratio of the air flowing to the outside from the slit 112 will increase, and the yarns Y, Y will flow from the slit 112 to the outside. There is a possibility that it will jump out. If the plane wall 114U is larger than 30° with respect to the direction of compressed air injection from the first upstream injection hole HU1, the volume of the upstream yarn splicing chamber 113U will be small, and the air may not be able to swirl sufficiently. . The same applies to the flat wall 114D.

In the yarn splicing nozzle 100, the flat wall 114U of the upstream yarn splicing chamber 113U is inclined 20° to 25° with respect to the compressed air injection direction of the first upstream injection hole HU1 when viewed from above. It is The flat wall 114D of the downstream yarn splicing chamber 113D is provided so as to be inclined by 20° to 25° with respect to the injection direction of the compressed air of the first downstream injection hole HD1 when viewed from the vertical direction. In this case, by injecting compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1, the two yarns Y, Y can be more effectively entangled to form a seam. .

In the yarn splicing nozzle 100, a boundary line formed between the flat wall 114U and the rest (the curved wall 115U) on the inner wall of the upstream yarn joining chamber 113U is connected to at least part of the edge of the first upstream injection hole HU1. is configured as A boundary line formed between the flat wall 114D and the other (curved wall 115D) on the inner wall of the downstream yarn joining chamber 113D is configured to be continuous with at least a portion of the edge of the first downstream injection hole HD1. there is With such a configuration, it is possible to specifically realize one aspect that exhibits the above effects that can be applied to various yarns Y. Further, since the air injected from the first upstream side injection hole HU1 and the first downstream side injection hole HD1 flows continuously along the plane walls 114U and 114D, the air flow is less likely to be disturbed and the yarn Y is also affected. No turbulence.

In the yarn splicing nozzle 100, the first upstream injection hole HU1 and the first downstream injection hole HD1 have a polygonal shape, and the boundary line of the inner wall of the upstream yarn joining chamber 113U is the same as the first upstream injection hole HU1. It is configured to overlap one side of the polygonal shape, and the boundary line of the inner wall of the downstream yarn splicing chamber 113D is configured to overlap one side of the polygonal shape of the first downstream injection hole HD1. With such a configuration, it is possible to specifically realize one aspect that exhibits the above effects that can be applied to various yarns Y.

In the yarn splicing nozzle 100, the first upstream injection hole HU1 and the first downstream injection hole HD1 are circular, and the boundary line of the inner wall of the upstream yarn joining chamber 113U is the first upstream injection hole HU1. The boundary line of the inner wall of the downstream yarn splicing chamber 113D may be configured to overlap the circular tangent line of the first downstream injection hole HD1. Even with such a configuration, it is possible to specifically realize one aspect that exhibits the above-described effects that can be applied to various yarns Y.

In the yarn splicing nozzle 100, the inner surface of the first upstream injection hole HU1 is connected to the flat wall 114U of the upstream yarn joining chamber 113U, and the inner surface of the first downstream injection hole HD1 is connected to the downstream yarn joining chamber 113D. It is configured so as to continue with the plane wall 114D. With such a configuration, it is possible to specifically realize one aspect that exhibits the above effects that can be applied to various yarns Y.

In the splicing nozzle 100, the upstream splicing chamber 113U and the downstream splicing chamber 113D are arranged so that their centers are separated from each other in the horizontal direction when viewed from above. When viewed from above and below, the compressed air injection directions of the first upstream injection hole HU1 and the first downstream injection hole HD1 are along the left-right direction and opposite to each other. As a result, the first upstream side injection hole HU1 and the first downstream side injection hole HD1 can be configured symmetrically in the horizontal direction when viewed from the vertical direction.

In the splicing nozzle 100, the upstream splicing chamber 113U has a curved wall 115U, and the downstream splicing chamber 113D has a curved wall 115D. When viewed from above, the second upstream injection hole HU2 injects compressed air along the tangential direction of the curved wall 115U (see FIG. 9). As viewed from above, the second downstream injection hole HD2 injects compressed air along the tangential direction of the curved wall 115D. In this case, the compressed air injected in the tangential direction from the second upstream side injection hole HU2 and the second downstream side injection hole HD2 mainly transmits the rotational force to the yarn Y, The fibers at the end of the yarn can be effectively wound. The compressed air from the second upstream side injection hole HU2 and the second downstream side injection hole HD2 also has elements of entanglement formed in the upstream side yarn joining chamber 113U and the downstream side yarn joining chamber 113D. It has an element of fiber winding at the outer edge of the side splicing chamber 113U and the downstream splicing chamber 113D, which contributes to the formation of the seam. As a result, even when splicing various yarns Y, the strength of the joint can be made sufficient.

In the yarn joining nozzle 100, a slit 112 communicating with the upstream yarn joining chamber 113U and the downstream yarn joining chamber 113D is formed. open to In this case, in the configuration provided with the slit 112, the yarn Y exiting the upstream yarn joining chamber 113U and the downstream yarn joining chamber 113D through the slit 112 is controlled by the second upstream injection hole HU2 and the second downstream injection hole HU2. It can be suppressed by injecting compressed air from the injection hole HD2.

In the splicing nozzle 100, the flat wall 114U is provided closer to the slit 112 than the center of the upstream splicing chamber 113U, and the flat wall 114D is closer to the slit 112 than the center of the downstream splicing chamber 113D. is provided in With such a configuration, it is possible to specifically realize one aspect that exhibits the above effects that can be applied to various yarns Y.

In the splicing nozzle 100, the second upstream injection hole HU2 and the second downstream injection hole HD2 are positioned between the first upstream injection hole HU1 and the first downstream injection hole HD1 in the vertical direction. . In this case, compared to the case where the first upstream injection hole HU1 and the first downstream injection hole HD1 are positioned between the second upstream injection hole HU2 and the second downstream injection hole HD2 in the vertical direction, the yarn Y can be suppressed from coming out of the upstream yarn joining chamber 113U and the downstream yarn joining chamber 113D.

The winder unit 3 includes a splicing nozzle 100 , a front plate 90 that supports the splicing nozzle 100 , and a controller 96 that controls injection of compressed air from the splicing nozzle 100 . In the yarn splicing device 26 as well, the yarn splicing nozzle 100 provides the above-described effect, that is, the effect that various yarns Y can be handled.

The winder unit 3 includes a first pressure regulating valve 171 for adjusting the injection pressure of the first upstream injection hole HU1, the second upstream injection hole HU2, the first downstream injection hole HD1, and the second downstream injection hole HD2. Two pressure regulating valves 172 are provided. As a result, for example, when the yarn Y is cotton denim yarn, the injection pressure of the compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1 is increased to the second upstream injection hole HU2 and the second downstream injection hole HU2. By controlling the first pressure regulating valve 171 and the second pressure regulating valve 172 so that the injection pressure of the compressed air from the side injection hole HD2 becomes higher, the entanglement of the two yarns Y, Y to be spliced is strengthened. It is possible to obtain the strength of the seam according to the denim yarn. In other words, it is possible to obtain the strength of the seam according to the type of the yarn Y.

In the yarn joining device 26 , the controller 96 controls opening and closing of the first electromagnetic valve 161 provided in the first air flow path 151 and opening and closing of the second electromagnetic valve 162 provided in the second air flow path 152 . In this case, the injection timing of the compressed air can be controlled using the first solenoid valve 161 and the second solenoid valve 162 .

FIGS. 10(a), 10(b), 11(a), 11(b), 12(a) and 12(b) show examples of compressed air injection timing conditions in the winder unit 3. FIG. 4 is a diagram showing; Time in each figure indicates that time has passed in the direction of the arrow. In each figure, the presence of a horizontal bar in the "untwisting portion" indicates that compressed air is injected in the untwisting portion 40. FIG. The presence of the horizontal bar of the "first injection hole" indicates that compressed air is being injected from the first upstream injection hole HU1 and the first downstream injection hole HD1. The presence of the horizontal bar of the "second injection hole" indicates that compressed air is being injected from the second upstream injection hole HU2 and the second downstream injection hole HD2. In the winder unit 3, the compressed air may be jetted at the untwisting section 40 and the yarn splicing section 50 based on jetting timing conditions according to the yarn type of the yarn Y, for example.

For example, the winder unit 3 has a control mode for splicing yarn Y, which is combed cotton yarn (first yarn type). It is found that the control mode for splicing the yarn Y, which is a combed cotton yarn, can be handled with the injection timing conditions shown in FIG. 10(a). The control section 96 of the winder unit 3 is configured to be able to execute the following control modes. That is, in the winder unit 3, after stopping the injection of the compressed air in the untwisting section 40, the controller 96 controls to inject the compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1. to start. Under the control of the control unit 96, the injection of compressed air from the second upstream side injection hole HU2 and the second downstream side injection hole HD2 is started after a delay, and then the first upstream side injection hole HU1 and the first downstream side injection hole Injection of compressed air from the hole HD1 and injection of compressed air from the second upstream injection hole HU2 and the second downstream injection hole HD2 may be stopped at the same time. In this case, combed cotton yarn can be used. The injection pressure of the compressed air in the first upstream injection hole HU1 and the first downstream injection hole HD1 is the same as the injection pressure of the compressed air in the second upstream injection hole HU2 and the second downstream injection hole HD2. (For example, injection pressure: 0.5 MPa).

As a result of a strength and elongation measurement test of the combed cotton yarn spliced under the injection timing conditions shown in FIG. I was able to confirm what I could do. In addition, it was confirmed that a seam with a beautiful shape was obtained. The retention (%) is the ratio of the tenacity of the spliced yarn Y to the tenacity of the yarn Y that is not spliced. The results of the strength and elongation measurement test here are the average values of the test results of 30 times. General measurement conditions can be adopted as other measurement conditions for the strength and elongation measurement test. The same applies to these in the following strength and elongation measurement tests.

Further, for example, the winder unit 3 has a control mode for splicing the yarn Y, which is a polyester yarn (second yarn type). It is found that the injection timing conditions shown in FIG. The control section 96 of the winder unit 3 is configured to be able to execute the following control modes. That is, in the winder unit 3, after stopping the injection of the compressed air in the untwisting section 40, the controller 96 controls to inject the compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1. to start. Under the control of the control unit 96, the injection of compressed air from the second upstream side injection hole HU2 and the second downstream side injection hole HD2 is started after a delay, and then the first upstream side injection hole HU1 and the first downstream side injection hole Injection of compressed air from the hole HD1 and injection of compressed air from the second upstream injection hole HU2 and the second downstream injection hole HD2 may be stopped at the same time. The injection period of the compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1 shown in FIG. 10(b) is longer than that shown in FIG. 10(a). The injection period of the compressed air from the second upstream injection hole HU2 and the second downstream injection hole HD2 shown in FIG. 10(b) is longer than that shown in FIG. 10(a). In this case, polyester yarn can be used. The injection pressure of the compressed air in the first upstream injection hole HU1 and the first downstream injection hole HD1 is the same as the injection pressure of the compressed air in the second upstream injection hole HU2 and the second downstream injection hole HD2. (For example, injection pressure: 0.4 MPa).

As a result of performing a strength and elongation measurement test on the polyester yarn spliced under the injection timing conditions shown in FIG. I was able to confirm what I can do. In addition, it was confirmed that a seam with a beautiful shape was obtained.

Further, for example, the winder unit 3 has a control mode for splicing the yarn Y, which is an acrylic yarn (third yarn type). It is found that the injection timing conditions shown in FIG. The control section 96 of the winder unit 3 is configured to be able to execute the following control modes. That is, in the winder unit 3, after stopping the injection of the compressed air in the untwisting section 40, the controller 96 controls to inject the compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1. to start. After that, the controller 96 controls to start injecting the compressed air from the second upstream side injection hole HU2 and the second downstream side injection hole HD2. Subsequently, under the control of the control unit 96, during injection of compressed air from the second upstream injection hole HU2 and the second downstream injection hole HD2, is stopped, and the injection of compressed air from the first upstream side injection hole HU1 and the first downstream side injection hole HD1 is started again. Then, under the control of the control unit 96, the injection of compressed air from the second upstream injection hole HU2 and the second downstream injection hole HD2 is stopped, and after a delay, the first upstream injection hole HU1 and the first downstream injection hole Injection of compressed air from the hole HD1 may be stopped. In this case, acrylic yarn can be used. The injection pressure of the compressed air in the first upstream injection hole HU1 and the first downstream injection hole HD1 is the same as the injection pressure of the compressed air in the second upstream injection hole HU2 and the second downstream injection hole HD2. (For example, injection pressure: 0.4 MPa).

As a result of conducting a strength and elongation measurement test on the acrylic yarn spliced under the injection timing conditions shown in FIG. I was able to confirm what I can do. In addition, it was confirmed that a seam with a beautiful shape was obtained.

Further, for example, the winder unit 3 has a control mode for splicing the yarn Y, which is a worsted yarn (fourth yarn type). It is found that the injection timing conditions shown in FIG. The control section 96 of the winder unit 3 is configured to be able to execute the following control modes. That is, in the winder unit 3, after stopping the injection of compressed air in the untwisting section 40, the controller 96 controls to inject compressed air from the second upstream injection hole HU2 and the second downstream injection hole HD2. to start. After that, the controller 96 controls to start injecting the compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1. Subsequently, under the control of the control unit 96, during injection of compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1, is stopped, and the injection of compressed air from the second upstream side injection hole HU2 and the second downstream side injection hole HD2 is started again. Then, under the control of the control unit 96, the injection of compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1 is stopped, and after a delay, the second upstream injection hole HU2 and the second downstream injection hole Injection of compressed air from the hole HD2 may be stopped. In this case, a worsted yarn can be accommodated. The injection pressure of the compressed air in the first upstream injection hole HU1 and the first downstream injection hole HD1 is the same as the injection pressure of the compressed air in the second upstream injection hole HU2 and the second downstream injection hole HD2. (For example, injection pressure: 0.65 MPa).

As a result of performing a strength and elongation measurement test on the worsted yarn spliced under the ejection timing conditions shown in FIG. I was able to confirm what I can do. In addition, it was confirmed that a seam with a beautiful shape was obtained.

Further, for example, the winder unit 3 has a control mode for splicing the yarn Y, which is the core yarn (fifth yarn type). It is found that the injection timing conditions shown in FIG. 12(a) can be used in the control mode for splicing the yarn Y, which is the core yarn yarn. The control section 96 of the winder unit 3 is configured to be able to execute the following control modes. That is, in the winder unit 3, after stopping the injection of the compressed air in the untwisting section 40, in a state where the yarn Y is sandwiched and gripped by the hold-down lever 85, the control section 96 controls the first upstream injection. Injection of compressed air from the hole HU1 and the first downstream injection hole HD1 is started, and then injection of compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1 is stopped. Subsequently, in a state in which the gripping of the pressing lever 85 is released, the control unit 96 controls to start injecting compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1, and then, after a delay, After starting the injection of compressed air from the second upstream injection hole HU2 and the second downstream injection hole HD2, the injection of compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1 and the Injection of compressed air from the second upstream injection hole HU2 and the second downstream injection hole HD2 may be stopped at the same time. In this case, it can correspond to the core yarn yarn. The injection pressure of the compressed air in the first upstream injection hole HU1 and the first downstream injection hole HD1 is the same as the injection pressure of the compressed air in the second upstream injection hole HU2 and the second downstream injection hole HD2. (For example, injection pressure: 0.6 MPa).

As a result of performing a strength and elongation measurement test on the core yarn yarn spliced under the injection timing conditions shown in FIG. I was able to confirm what I can do. In addition, it was confirmed that a seam with a beautiful shape was obtained.

Further, for example, the winder unit 3 has a control mode for splicing the yarn Y, which is a lyocell yarn (sixth yarn type). It is found that the injection timing conditions shown in FIG. The control section 96 of the winder unit 3 is configured to be able to execute the following control modes. That is, in the winder unit 3, after stopping the injection of the compressed air in the untwisting section 40, the controller 96 controls to inject the compressed air from the first upstream injection hole HU1 and the first downstream injection hole HD1. is started, and injection of compressed air from the first upstream side injection hole HU1 and the first downstream side injection hole HD1 is stopped. After that, under the control of the control unit 96, injection of compressed air from the second upstream injection hole HU2 and the second downstream injection hole HD2 is started, and from the second upstream injection hole HU2 and the second downstream injection hole HD2 Injection of compressed air may be stopped. In this case, lyocell fiber threads can be accommodated. The injection pressure of the compressed air in the first upstream injection hole HU1 and the first downstream injection hole HD1 is the same as the injection pressure of the compressed air in the second upstream injection hole HU2 and the second downstream injection hole HD2. (For example, injection pressure: 0.55 MPa).

As a result of performing a strength and elongation measurement test on the lyocell fiber yarn spliced under the injection timing conditions shown in FIG. I was able to confirm what I could do. In addition, it was confirmed that a seam with a beautiful shape was obtained.

[Modification]
Although the embodiments have been described above, one aspect of the present invention is not limited to the above embodiments.

In the above-described embodiment, the lateral biases of the upstream yarn joining chamber 113U and the downstream yarn joining chamber 113D may be opposite. That is, instead of the upstream yarn joining chamber 113U being biased to one side and the downstream yarn joining chamber 113D being biased to the other side in the horizontal direction, the upstream yarn joining chamber 113U is arranged to be biased to the other side in the horizontal direction. The biased and downstream side yarn splicing chamber 113D may be arranged biased to one side. Such a modified example is used when the twist direction in the yarn splicing is reversed in the above embodiment. Note that, in this modification, the nozzle guide 94 is turned upside down and fixed at a position on the opposite side in the left-right direction via the yarn running path L in the yarn splicing portion 50 with respect to the above-described embodiment. The nozzle guide 94 can be used regardless of the lateral positional relationship between the upstream yarn joining chamber 113U and the downstream yarn joining chamber 113D.

In the above embodiment, the injection start timings of the first upstream injection hole HU1, the second upstream injection hole HU2, the first downstream injection hole HD1, and the second downstream injection hole HD2 can be freely set separately. can be configured to Compressed air blowing times of the first upstream injection hole HU1, the second upstream injection hole HU2, the first downstream injection hole HD1, and the second downstream injection hole HD2 can be freely set separately. good too. The injection pressure of the compressed air of the first upstream side injection hole HU1, the second upstream side injection hole HU2, the first downstream side injection hole HD1 and the second downstream side injection hole HD2 can be freely set separately. good too. The untwisting section 40 may be configured so that the timing of stopping the injection of compressed air can be freely set. Such a configuration can be realized by using a known technology such as an electromagnetic valve or a pressure reducing valve.

In the above embodiment, the yarn splicing device according to one aspect of the present invention is applied to the winder unit 3, but the yarn splicing device according to one aspect of the present invention is a winding unit of a spinning machine or a plurality of winding units. It may be applied to a work cart or the like that moves between.

Although the nozzle body 110 is made of ceramic in the above embodiment, it is not limited to this. For example, nozzle body 110 may be formed of metal. Moreover, when forming the material of the nozzle main body 110 with metal, a powder injection molding manufacturing method (metal injection manufacturing method) can also be used. Since it is a metal, there is no fear of it breaking like ceramic, and there is no need to machine it into a complicated shape. Iron or stainless steel can be used as the metal material when using the powder injection molding method.

3... Winder unit (winding device) 26... Yarn splicing device 90... Front plate (support) 85... Hold-down lever (yarn shrinkage suppression lever) 96... Control unit 100... Yarn splicing nozzle 110... Nozzle Main body 112 Slit (groove) 113D Downstream yarn joining chamber 113U Upstream yarn joining chamber 114D Flat wall 114U Flat wall 115D Curved wall 115U Curved wall 171 First pressure Regulating valve (pressure regulating section) 172... Second pressure regulating valve (pressure regulating section) HD1... First downstream side injection hole HD2... Second downstream side injection hole HU1... First upstream side injection hole HU2... Second upstream injection hole, Y... Thread.

Claims (19)

A splicing nozzle that splices yarns by jetting compressed air,
a nozzle body;
an upstream-side yarn joining chamber and a downstream-side yarn joining chamber formed in the nozzle body, communicating with each other in the yarn running direction, and having a flat wall as a part of an inner wall thereof;
a first upstream injection hole and a second upstream injection hole formed in the nozzle body for injecting compressed air toward the upstream yarn joining chamber;
a first downstream injection hole and a second downstream injection hole formed in the nozzle body for injecting compressed air toward the downstream yarn joining chamber;
The first upstream injection hole injects compressed air along the flat wall of the upstream yarn splicing chamber,
A splicing nozzle, wherein the first downstream injection hole injects compressed air along the flat wall of the downstream splicing chamber. When viewed from the yarn running direction, the flat wall of the upstream yarn splicing chamber is provided so as to be inclined by 15° to 30° with respect to the injection direction of the compressed air of the first upstream injection hole,
When viewed from the yarn running direction, the flat wall of the downstream yarn splicing chamber is provided so as to be inclined by 15° to 30° with respect to the injection direction of the compressed air of the first downstream injection hole. The splicing nozzle according to claim 1. When viewed from the yarn running direction, the flat wall of the upstream yarn splicing chamber is provided so as to be inclined by 20° to 25° with respect to the direction of compressed air injection of the first upstream injection hole,
When viewed from the yarn running direction, the flat wall of the downstream yarn splicing chamber is provided so as to be inclined by 20° to 25° with respect to the injection direction of the compressed air of the first downstream injection hole. The splicing nozzle according to claim 2. A boundary line formed between the flat wall and the rest on the inner wall of the upstream yarn joining chamber is configured to be continuous with at least a part of the edge of the first upstream injection hole,
2. A boundary line formed between the flat wall and the rest of the inner wall of the downstream yarn joining chamber is configured to be continuous with at least a portion of an edge of the first downstream injection hole. 4. The splicing nozzle according to any one of 1 to 3. The first upstream side injection hole and the first downstream side injection hole exhibit a circular shape,
The boundary line of the inner wall of the upstream yarn splicing chamber is configured to overlap a circular tangent line of the first upstream injection hole,
The yarn splicing nozzle according to claim 4, wherein the boundary line of the inner wall of the downstream yarn splicing chamber overlaps a circular tangent line of the first downstream injection hole. The first upstream side injection hole and the first downstream side injection hole exhibit a polygonal shape,
The boundary line of the inner wall of the upstream yarn joining chamber overlaps with one side of the polygonal shape of the first upstream injection hole,
5. The yarn splicing nozzle according to claim 4, wherein the boundary line of the inner wall of the downstream yarn splicing chamber overlaps one side of the polygonal shape of the first downstream injection hole. The inner surface of the first upstream injection hole is configured to be continuous with the flat wall of the upstream yarn splicing chamber,
The splicing nozzle according to any one of claims 1 to 6, wherein the inner surface of the first downstream injection hole is configured to be continuous with the flat wall of the downstream splicing chamber. When viewed from the yarn running direction, the upstream yarn joining chamber and the downstream yarn joining chamber are arranged so that their centers are separated from each other in a predetermined direction,
2. When viewed from the yarn traveling direction, the first upstream injection hole and the first downstream injection hole inject compressed air in directions opposite to each other along the predetermined direction. 8. The splicing nozzle according to any one of 1 to 7. Each of the upstream-side yarn joining chamber and the downstream-side yarn joining chamber has an arc-shaped curved surface wall as viewed from the yarn running direction on a part of the inner wall,
the second upstream injection hole injects compressed air along a tangential direction to the curved wall of the upstream yarn joining chamber when viewed from the yarn traveling direction;
The second downstream injection hole according to any one of claims 1 to 8, wherein the compressed air is injected along a tangential direction of the curved wall of the downstream yarn joining chamber when viewed from the yarn traveling direction. Yarn splicing nozzle as described. a groove provided in the nozzle body, extending in the yarn running direction, and having a bottom side communicating with the upstream yarn joining chamber and the downstream yarn joining chamber;
The yarn splicing nozzle according to any one of claims 1 to 9, wherein the second upstream side injection hole and the second downstream side injection hole open to the bottom side of the groove. When viewed from the yarn running direction, the flat wall of the upstream yarn joining chamber is provided closer to the groove than the center of the upstream yarn joining chamber,
11. The yarn splicing nozzle according to claim 10, wherein the flat wall of the downstream yarn joining chamber is provided closer to the groove than the center of the downstream yarn joining chamber when viewed from the yarn running direction. Claims 9 to 11, wherein the second upstream injection hole and the second downstream injection hole are positioned between the first upstream injection hole and the first downstream injection hole in the yarn running direction. The splicing nozzle according to any one of . a splicing nozzle according to any one of claims 1 to 12;
a support that supports the splicing nozzle;
and a control unit that controls injection of compressed air in the yarn splicing nozzle. A winding device having a control mode for joining yarns of a first yarn type and a second yarn type,
The control unit
Start injection of compressed air from the first upstream injection hole and the first downstream injection hole, start injection of compressed air from the second upstream injection hole and the second downstream injection hole, A control mode for simultaneously stopping injection of compressed air from the first upstream injection hole and the first downstream injection hole and injection of compressed air from the second upstream injection hole and the second downstream injection hole. 14. The winding device of claim 13, configured to be able to: A winding device having a control mode for splicing a yarn of a third yarn type,
The control unit
Start injection of compressed air from the first upstream injection hole and the first downstream injection hole, start injection of compressed air from the second upstream injection hole and the second downstream injection hole, Injection of compressed air from the first upstream injection hole and the first downstream injection hole is stopped, and injection of compressed air from the first upstream injection hole and the first downstream injection hole is restarted. , stopping injection of compressed air from the second upstream injection hole and the second downstream injection hole, and stopping injection of compressed air from the first upstream injection hole and the first downstream injection hole 14. The winding device according to claim 13, configured to be able to execute a control mode. A winding device having a control mode for splicing a yarn of a fourth yarn type,
The control unit
Start injection of compressed air from the second upstream injection hole and the second downstream injection hole, start injection of compressed air from the first upstream injection hole and the first downstream injection hole, Injection of compressed air from the second upstream injection hole and the second downstream injection hole is stopped, and injection of compressed air from the second upstream injection hole and the second downstream injection hole is restarted. , stopping injection of compressed air from the first upstream injection hole and the first downstream injection hole, and stopping injection of compressed air from the second upstream injection hole and the second downstream injection hole 14. The winding device according to claim 13, configured to be able to execute a control mode. A winding device having a control mode for splicing a yarn of a fifth yarn type,
A yarn shrinkage suppression lever that sandwiches and grips the fifth yarn type between the support and the yarn shrinkage suppression lever,
The control unit
In a state where the yarn shrinkage suppression lever grips the fifth yarn type, the injection of compressed air from the first upstream side injection hole and the first downstream side injection hole is started, and the first upstream side stopping injection of compressed air from the injection hole and the first downstream injection hole;
In a state in which the grip of the yarn contraction suppression lever is released, injection of compressed air from the first upstream injection hole and the first downstream injection hole is started, and the second upstream injection hole and the second injection hole are started. After starting injection of compressed air from the downstream side injection hole, injection of compressed air from the first upstream side injection hole and the first downstream side injection hole, the second upstream side injection hole and the second downstream side injection hole 14. The winding device according to claim 13, configured to be capable of executing a control mode for simultaneously stopping injection of compressed air from the side injection holes. A winding device having a control mode for splicing a yarn of a sixth yarn type,
The control unit
Start injection of compressed air from the first upstream injection hole and the first downstream injection hole, stop injection of compressed air from the first upstream injection hole and the first downstream injection hole, Control for starting injection of compressed air from the second upstream injection hole and the second downstream injection hole and stopping injection of compressed air from the second upstream injection hole and the second downstream injection hole 14. The winding device according to claim 13, configured to enable the mode. 2. A pressure adjusting unit that adjusts injection pressure from at least one of the first upstream injection hole, the second upstream injection hole, the first downstream injection hole, and the second downstream injection hole. The winding device according to any one of 13 to 18.

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