JP2021091501A - Thread-piecing device, thread-piecing nozzle structure and winder - Google Patents

Abstract

To provide a thread-piecing device, thread-piecing nozzle structure and winder that can cope with a variety of threads.SOLUTION: A thread-piecing device 26 comprises a thread-piecing unit 50 that performs thread-piecing by an ejection of compressed air and a control unit 96 that controls the ejection of compressed air in the thread-piecing unit 50. The thread-piecing unit 50 has a downstream-sided thread-piecing chamber 113a and an upstream-sided thread-piecing chamber 113b that are adjacent in a thread-traveling direction and communicate with each other, first and second downstream-sided ejection ports HA1, HA2 for ejecting compressed air to the downstream-sided thread-piecing chamber 113a, and first and second upstream-sided ejection ports HB1, HB2 for ejecting compressed air to the upstream-sided thread-piecing chamber 113b. The control unit 96 can change at least any of ejection-start timing of compressed air from respective ones of the first and second downstream-sided ejection ports HA1, HA2 and the first and second upstream-sided ejection ports HB1, HB2.SELECTED DRAWING: Figure 5

Description

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

As a conventional thread splicing device, for example, the device described in Patent Document 1 is known. In the thread splicing device described in Patent Document 1, a spouting airflow is ejected from a first air blowing hole into a thread splicing chamber of a thread splicing portion (splicing nozzle block), and at the same time, on the upstream side of the thread path of the first air blowing hole and The ejected airflow is ejected from the second air blowing hole provided on the downstream side of the thread path.

Japanese Patent No. 2590565

In the yarn splicing device as described above, the strength of the seam or the appearance quality may be insufficient depending on the yarn type and count of the yarn. Therefore, in recent years, there has been a demand for the development of a yarn splicing device capable of handling various yarns (various yarn types and counts).

Therefore, an object of the present invention is to provide a yarn splicing device, a yarn splicing nozzle structure, and a winding device that can handle various yarns.

The thread splicing device according to the present invention is a thread splicing device including a thread splicing portion that splics yarn by injecting compressed air and a control unit that controls injection of compressed air in the yarn splicing portion. To the upstream yarn joint chamber and the downstream yarn joint chamber that are adjacent to each other in the yarn running direction and communicate with each other, a plurality of upstream injection holes that inject compressed air into the upstream yarn joint chamber, and the downstream yarn joint chamber. It has a plurality of downstream injection holes for injecting compressed air, and the control unit changes at least one of the injection start timings of the compressed air from each of the plurality of upstream injection holes and each of the plurality of downstream injection holes. It is possible.

In this thread splicing device, compressed air can be injected into the upstream thread splicing chamber and the downstream thread splicing chamber from each of the plurality of upstream injection holes and each of the plurality of downstream injection holes at an appropriate injection start timing. .. Therefore, compressed air can be applied to the end of the yarn to be spliced in various ways, and it is possible to deal with various yarns.

In the thread joining device according to the present invention, the plurality of upstream injection holes include the first upstream injection hole and the second upstream injection hole, and the plurality of downstream injection holes include the first downstream injection hole and the second downstream injection hole. Including the downstream injection hole, the control unit makes the injection start timing of the first upstream injection hole different from the injection start timing of the second upstream injection hole, and sets the injection start timing of the first downstream injection hole to the second. It may be different from the injection start timing of the downstream injection hole. In this case, control is performed so that the injection start timings of the first upstream side injection hole and the second upstream side injection hole are different from each other, and the injection start timings of the first downstream side injection hole and the second downstream side injection hole are different from each other. Therefore, it is possible to handle various threads.

In the thread joining device according to the present invention, the hole shape of the first upstream side injection hole and the hole shape of the second upstream side injection hole are different, and the hole shape of the first downstream side injection hole and the hole shape of the second downstream side injection hole are different. It may be different from the hole shape. In this case, the shapes of the first upstream injection hole and the second upstream injection hole are different from each other, and the shapes of the first downstream injection hole and the second downstream injection hole are different from each other. It is possible to handle various threads according to the difference in shape.

In the thread joining device according to the present invention, one of the hole shape of the first upstream side injection hole and the hole shape of the second upstream side injection hole is a polygonal shape, and the hole shape of the first upstream side injection hole The other of the hole shapes of the second upstream injection hole is circular, and one of the hole shape of the first downstream injection hole and the hole shape of the second downstream injection hole is polygonal. Yes, the other of the hole shape of the first downstream injection hole and the hole shape of the second downstream injection hole may be circular. With such a configuration, one aspect of exhibiting the above-mentioned effect corresponding to various threads can be concretely realized.

In the thread splicing device according to the present invention, the shape of the upstream thread splicing chamber is biased to one side in a predetermined direction orthogonal to the thread traveling direction with respect to the thread traveling path, and the shape of the downstream thread splicing chamber. Is a shape that is biased to the other side in the predetermined direction with respect to the thread traveling path, and the first upstream side injection hole and the second upstream side injection hole are viewed from the thread traveling direction and the direction orthogonal to the predetermined direction. The first downstream injection hole and the second downstream injection hole are located on one side of the thread traveling path in a predetermined direction, and the first downstream injection hole and the second downstream injection hole are relative to the thread traveling path when viewed from the thread traveling direction and the direction orthogonal to the predetermined direction. It may be located on the other side in a predetermined direction. With such a configuration, one aspect of exhibiting the above-mentioned effect corresponding to various threads can be concretely realized.

In the yarn splicing device according to the present invention, the first upstream side injection hole and the second upstream side injection hole inject compressed air toward the edge of the upstream side yarn splicing chamber when viewed from the thread traveling direction, and the first The downstream injection hole and the second downstream injection hole may inject compressed air toward the edge of the downstream yarn joint chamber when viewed from the yarn traveling direction. In this case, it is possible to obtain a large winding force at the time of thread splicing.

The thread splicing device according to the present invention is a device for splicing cotton denim yarn, and the control unit sets the injection start timing of the first upstream injection hole and the injection start timing of the first downstream injection hole. 2 The injection start timing of the upstream injection hole and the injection start timing of the second downstream injection hole may be earlier than the injection start timing. In this case, cotton denim yarn can be used.

The thread splicing device according to the present invention is a device for splicing purified cellulose fibers, and the control unit sets the injection start timing of the second upstream injection hole and the injection start timing of the second downstream injection hole. It may be earlier than the injection start timing of the 1 upstream side injection hole and the injection start timing of the 1st downstream side injection hole. In this case, it is possible to deal with purified cellulose fibers.

In the thread splicing device according to the present invention, the shape of the upstream thread splicing chamber is biased to one side in a predetermined direction orthogonal to the thread traveling direction with respect to the thread traveling path, and the shape of the downstream thread splicing chamber. Is a shape biased to the other side in a predetermined direction with respect to the thread traveling path, and the second upstream injection hole and the first downstream injection hole are viewed from the thread traveling direction and the direction orthogonal to the predetermined direction. The first upstream injection hole and the second downstream injection hole are located on one side of the thread traveling path in a predetermined direction, and the first upstream injection hole and the second downstream injection hole are relative to the thread traveling path when viewed from the thread traveling direction and the direction orthogonal to the predetermined direction. It may be located on the other side in a predetermined direction. With such a configuration, one aspect of exhibiting the above-mentioned effect corresponding to various threads can be concretely realized.

In the thread splicing device according to the present invention, the first upstream side injection hole injects compressed air toward the center of the upstream side thread splicing chamber when viewed from the thread running direction, and the second upstream side injection hole is thread running. When viewed from the direction, compressed air is injected toward the edge of the upstream yarn joint chamber, and the first downstream injection hole injects compressed air toward the center of the downstream yarn joint chamber when viewed from the yarn running direction. The second downstream injection hole may inject compressed air toward the edge of the downstream yarn joint chamber when viewed from the yarn traveling direction. In this case, the fibers at the thread ends are entangled by injecting compressed air from the first upstream injection hole and the first downstream injection hole, and the compressed air from the second upstream injection hole and the second downstream injection hole is entangled. The thread end can be wound by injection.

In the thread splicing device according to the present invention, the upstream thread splicing chamber is provided so that a part of the inner surface thereof is raised, and has an upstream injection receiving wall having a wall surface facing the first upstream injection hole. The downstream thread joint chamber may have a downstream injection receiving wall which is provided so that a part of the inner surface thereof is raised and has a wall surface facing the first downstream injection hole. In this case, the compressed air from the first upstream side injection hole and the first downstream side injection hole hits the upstream side injection receiving wall and the downstream side injection receiving wall and diffuses. As a result, the above-mentioned action of entwining the fibers at the thread end becomes remarkable.

In the thread joining device according to the present invention, the control unit sets the injection start timing of the first upstream injection hole and the injection start timing of the first downstream injection hole to the injection start timing of the second upstream injection hole and the second downstream. It may be earlier than the injection start timing of the side injection hole. In this case, the above-mentioned action of entwining the fibers at the thread end and winding the thread end is effectively exhibited.

In the thread joining device according to the present invention, the control unit may control the opening and closing of the solenoid valve provided in the air flow path that guides the compressed air to the plurality of upstream side injection holes and the plurality of downstream side injection holes. In this case, the solenoid valve can be used to control the injection start timing of the compressed air.

In the thread splicing device according to the present invention, the thread splicing portion includes a thread splicing nozzle structure having a nozzle in which an upstream thread splicing chamber and a downstream thread splicing chamber are formed, and a support block for accommodating the nozzle. It may be configured. With such a configuration, one aspect of exhibiting the above-mentioned effect corresponding to various threads can be concretely realized.

The take-up device according to the present invention includes the above-mentioned thread splicing device. Since this take-up device is also provided with the above-mentioned thread splicing device, it can handle various threads.

The thread splicing nozzle structure according to the present invention is a thread splicing nozzle structure that splics threads by injecting compressed air, and is an upstream thread splicing chamber and a downstream thread splicing chamber that are adjacent to each other in the thread traveling direction and communicate with each other. The nozzle is provided with a nozzle formed by the nozzle and a support block for accommodating the nozzle, and the nozzle is compressed into the first and second upstream injection holes for injecting compressed air into the upstream yarn joint chamber and the downstream yarn joint chamber. It has first and second downstream injection holes for injecting air, and the hole shape of the first upstream injection hole and the hole shape of the second upstream injection hole are different from those of the first downstream injection hole. The hole shape and the hole shape of the second downstream injection hole are different.

In this thread splicing nozzle structure, compressed air is injected from each of the first and second upstream side injection holes and the first and second downstream side injection holes into the upstream side thread splicing chamber and the downstream side thread splicing chamber, respectively. can do. The shapes of the first upstream injection hole and the second upstream injection hole are different from each other, and the shapes of the first downstream injection hole and the second downstream injection hole are different from each other. It is possible to deal with various threads depending on the situation.

According to the present invention, it is possible to provide a yarn splicing device, a yarn splicing nozzle structure, and a winding device that can handle various yarns.

FIG. 1 is a front view showing an automatic winder. FIG. 2 is a side view showing the winder unit of FIG. FIG. 3 is a front view showing the yarn splicing device according to the first embodiment. FIG. 4A is a perspective view showing the front side of the thread joint nozzle structure according to the first embodiment. FIG. 4B is a perspective view showing the rear side of the thread joint nozzle structure according to the first embodiment. 5 (a) is a cross-sectional view taken along the line V (a)-V (a) of FIG. 4 (a). 5 (b) is a cross-sectional view taken along the line V (b) -V (b) of FIG. 5 (a). FIG. 6 is a cross-sectional view corresponding to FIG. 5A for explaining the injection of compressed air in the thread joining device according to the first embodiment. FIG. 7 is a graph showing the relationship between the blowing time of compressed air and the winding force. It is a figure which shows the example of the injection timing condition of the compressed air in the thread splicing apparatus which concerns on 1st Embodiment. FIG. 9A is a cross-sectional view corresponding to FIG. 5A of the thread joining device according to the second embodiment. 9 (b) is a cross-sectional view taken along the line IX (b) -IX (b) of FIG. 9 (a). FIG. 10 is a cross-sectional view corresponding to FIG. 9A for explaining the injection of compressed air in the thread joining device according to the second embodiment. FIG. 11A is a cross-sectional view corresponding to FIG. 5A of the thread joining device according to the third embodiment. 11 (b) is a cross-sectional view taken along the line XI (b) -XI (b) of FIG. 11 (a). FIG. 12 is a cross-sectional view corresponding to FIG. 11A for explaining the injection of compressed air in the thread joining device according to the third embodiment. FIG. 13 (a) is a cross-sectional view corresponding to FIG. 5 (a) of the thread joining device according to the fourth embodiment. FIG. 13 (b) is a cross-sectional view taken along the line XIII (b) -XIII (b) of FIG. 13 (a).

Hereinafter, preferred 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 equivalent elements are designated by the same reference numerals, and duplicate description will be omitted.

[First Embodiment]
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 ball lifting device 7. The machine stand control device 5 can communicate with each of the plurality of winder units (winding devices) 3. The operator of the automatic winder 1 can collectively manage a plurality of winder units 3 by appropriately operating the machine base control device 5. Each winder unit 3 forms a package P by unwinding the yarn Y from the yarn feeding bobbin SB and winding the yarn Y around the winding bobbin WB while swinging the yarn Y. When the package P is fully wound (a state in which a specified amount of yarn is wound) in each winder unit 3, the bobbin 7 travels to the position of the winder unit 3 and removes the full-wound package. , Set the empty take-up bobbin WB.

As shown in FIG. 2, the winder unit 3 includes a unit control unit 10, a yarn feeding device 12, and a winding device 14. The unit control unit 10 includes, for example, a CPU (Central Processing Unit) and a ROM (Read Only Memory). A program for controlling each configuration of the winder unit 3 is stored in the ROM. The CPU executes the program stored in the ROM. The unit control unit 10 includes a control unit 96, which will be described later.

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

The take-up device 14 includes a cradle 16 and a take-up drum 18. The cradle 16 rotatably supports the take-up bobbin WB (or package P) by sandwiching the take-up bobbin WB. The take-up drum 18 traverses the thread Y on the surface of the package P and rotates the package P. The take-up drum 18 is rotationally driven by a drum drive motor (not shown). With the outer circumference of the package P in contact with the take-up drum 18, the take-up drum 18 is rotationally driven to rotate the package P in a driven manner. A spiral twill groove is formed on the outer peripheral surface of the take-up drum 18. The thread Y unwound from the thread-feeding bobbin SB is wound around the surface of the package P while being traversed by a twill groove with a constant width. Thereby, the package P having a constant winding width can be formed.

Each winder unit 3 includes an unwinding assisting device 20, a tension applying device 22, a tension detecting device 24, and an unwinding assisting device 20, a tension applying device 22, and a tension detecting device 24 in this order from the yarn feeding device 12 side in the thread path between the yarn feeding device 12 and the winding device 14. A thread splicing device 26 and a thread monitoring device 28 are provided. A first capture guide device 30 and a second capture guide device 32 are arranged in the vicinity of the thread joining device 26.

The unwinding assisting device 20 prevents the thread Y unwound from the thread feeding bobbin SB from being excessively swung by centrifugal force, and appropriately unwinds the thread Y from the thread feeding bobbin SB. The tension applying device 22 applies a predetermined tension to the traveling thread Y. In the present embodiment, the tension applying 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 traveling thread Y between the thread feeding device 12 and the winding device 14. In the thread joining device 26, when the thread Y is divided between the thread feeding device 12 and the winding device 14 for some reason, the thread Y on the thread feeding device 12 side and the thread Y on the winding device 14 side And splice.

The thread monitoring device 28 monitors the state of the thread Y traveling on the thread path, and detects the presence or absence of a thread defect based on the monitored information. The thread defect is, for example, at least one of an abnormality in the thickness of the thread Y, a foreign substance contained in the thread Y, a thread breakage, and the like.

The first catching guide device 30 can rotate from the standby position on the yarn feeding device 12 side to the catching position on the winding device 14 side. The first catching guide device 30 catches the thread Y at the catching position and guides the thread Y to the thread joining device 26. The second catching guide device 32 can rotate from the standby position on the yarn feeding device 12 side to the catching position on the winding device 14 side. The second catching guide device 32 catches the thread Y at the supplementary position and guides the thread Y to the thread joining device 26.

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

FIG. 3 is a front view showing the thread splicing device 26. In the following description, for convenience, the winding device 14 side is referred to as a downstream side, the yarn feeding device 12 side is referred to as an upstream side, and the traveling path (thread path) side of the yarn Y with respect to the yarn joining device 26 is referred to as a front side. The other side is called the rear side. The direction orthogonal to the vertical direction and the front-back direction is called the left-right direction. Further, the thread end of the thread Y on the winding device 14 side is referred to as the first thread end, and the thread end of the thread Y on the thread feeding device 12 side is referred to as the second thread end.

As shown in FIG. 3, the yarn splicing device 26 includes a front plate (contact member) 90, an untwisted portion 40 including a first untwisted pipe member 41A and a second untwisted pipe member 41B, and compressed air. A yarn splicing portion 50 that splics yarn by injection, a pair of yarn gathering levers (not shown) that can be swiveled so as to sandwich the untwisted portion 40, and a yarn splicing portion 50 that can be swiveled so as to be sandwiched between them. A thread presser member 80 including the first and second thread presser levers 82 and 83, an air guide 94, and a control unit 96 (see FIG. 5B) for controlling the injection of compressed air in the thread joint portion 50. To be equipped with.

The front plate 90 has a plate shape with the front-rear direction as the thickness direction. The front surface (contact surface) 90a of the front plate 90 has a flat shape along the thread traveling direction. A thread joint portion 50 is provided on the front surface 90a of the front plate 90. On the front surface 90a of the front plate 90, a first yarn end introduction port, which is an opening of the first untwisted pipe member 41A, is provided on the downstream side of the yarn joint portion 50, and a second solution is provided on the upstream side of the yarn joint portion 50. A second yarn end introduction port, which is an opening of the twisted pipe member 41B, is provided.

On the front surface 90a of the front plate 90, a first guide portion 45A is provided on the downstream side of the first untwisted pipe member 41A, and a second guide portion 45B is provided on the upstream side of the second untwisted pipe member 41B. There is. The first and second guide portions 45A and 45B are arranged so as to face each other with the thread joint portion 50 interposed therebetween. Each of the first and second guide portions 45A and 45B guides the thread Y guided by the first and second capture guide devices 30 and 32, respectively.

The first untwisted pipe member 41A takes in the first yarn end by the action of compressed air and untwists. The second untwisted pipe member 41B takes in the second yarn end by the action of compressed air and untwists. The yarn joint portion 50 twists the first yarn end untwisted by the first untwisted pipe member 41A and the second yarn end untwisted by the second untwisted pipe member 41B by the action of compressed air. Take over. When twisting the yarn ends together in the yarn joint 50, the first and second yarn ends are held by a clamp (not shown), and the first and second untwisted pipes are held by a yarn gathering lever (not shown). It is pulled out from the members 41A and 41B and is pressed by the first and second thread pressing levers 82 and 83 in the vicinity of the thread joint portion 50.

The thread holding member 80 is connected to a drive source (not shown) such as a stepping motor via a cam link mechanism 95. The thread holding member 80 is provided so as to be movable in the direction of approaching and separating 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 holding levers 82 and 83 of the thread holding member 80 rotate (rotate) so that the tip side approaches and separates from the front surface 90a of the front plate 90 by the driving force of the driving source. The thread pressing member 80 abuts on 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 holding levers 82 and 83 may be urged so that the tip side approaches the front plate 90 by, for example, a torsion coil spring (not shown). The air guide 94 is a member that guides the compressed air injected in the yarn joint portion 50, and is an opening on the upper side and the lower side of the yarn joint chamber 113 into which the first and second yarn ends are introduced in the yarn joint portion 50. It is provided to block a part.

In the thread joining device 26 configured as described above, first, the first and second thread gathering levers (not shown) and the first and second thread holding levers 82 are swiveled toward the front plate 90 side. As a result, the downstream yarn Y and the upstream yarn Y guided by the first and second capture guide devices 30 and 32 are attracted to the untwisted portion 40 side. Then, the upper thread Y and the lower thread Y are held by the clamp and cut by the cutter in this state. The first yarn end is fed into the inside of the first untwisted pipe member 41A, and the second yarn end is fed into the inside of the second untwisted pipe member 41B. The injection of compressed air is started in the first and second untwisted 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 gathering levers (not shown) further rotate. As a result, while the first yarn end and the second yarn end are pulled out from the first and second untwisted pipe members 41A and 41B, respectively, the first and second yarn retainer levers 82 and 83 near the yarn joint portion 50. It is held down. The injection of compressed air is started at the yarn joint 50, and the untwisted first yarn end and the second yarn end are twisted 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 and 83 rotate in opposite directions. Then, the holding of the upper thread Y and the lower thread Y by the clamp is released. As a result, the connected thread Y returns to the traveling path on the front side of the thread joining device 26.

FIG. 4A is a perspective view showing the front side of the thread joint nozzle structure 100. FIG. 4B is a perspective view showing the rear side of the thread joint nozzle structure 100. 5 (a) is a cross-sectional view taken along the line V (a)-V (a) of FIG. 4 (a). 5 (b) is a cross-sectional view taken along the line V (b) -V (b) of FIG. 5 (a). The thread splicing portion 50 is a portion where thread splicing is performed by injecting compressed air, and includes a thread splicing nozzle structure 100. The thread joint nozzle structure 100 includes a nozzle 110 and a support block 120.

As shown in FIGS. 4 (a), 4 (b) and 5 (a), the nozzle 110 is fixed to the support block 120. The nozzle 110 is made of, for example, ceramic. A groove 111 extending in a V-shaped cross section is formed on the front side of the nozzle 110 from the upper end to the lower end. At the bottom of the groove 111, a thread joint chamber 113 communicating with the groove 111 is formed through a passage portion 112. The thread splicing chamber 113 is a space in which thread splicing is performed by the action of compressed air. The thread splicing chamber 113 has a downstream thread splicing chamber 113a and an upstream thread splicing chamber 113b.

The downstream thread joint chamber 113a is provided from the center to the lower side in the vertical direction (thread running direction) of the nozzle 110, and is open to the downstream side. The downstream thread joint chamber 113a has a circular shape that is biased from the center to one side in the left-right direction when viewed from the downstream side. The upstream thread joint chamber 113b is provided from the center of the nozzle 110 in the vertical direction to the upstream side, and is open to the upstream side. The upstream thread joint chamber 113b has a circular shape that is biased from the center to the other side in the left-right direction when viewed from the upstream side. The downstream thread joint chamber 113a and the upstream thread joint chamber 113b are adjacent to each other in the vertical direction and communicate with each other at the central portion in the vertical direction of the nozzle 110.

As shown in FIGS. 5A and 5B, the nozzle 110 is formed with a first passage 140a and a second passage 140b for supplying compressed air to the downstream thread joint chamber 113a. The first and second passages 140a and 140b are through holes leading to the downstream thread joint chamber 113a. The first and second passages 140a and 140b extend in an inclined manner inside the nozzle 110 following the V-shape of the groove 111. The first and second passages 140a and 140b are arranged in the vertical direction when viewed from the front (the direction orthogonal to the thread traveling direction and the predetermined direction), and are located on one side of the thread traveling path L in the left-right direction. .. The first passage 140a is located on the upstream side (inside the nozzle 110) of the second passage 140b when viewed from the front. The openings on the downstream side thread joint chamber 113a side of each of the first and second passages 140a and 140b constitute the first downstream side injection hole HA1 and the second downstream side injection hole HA2.

The first and second downstream side injection holes HA1 and HA2 inject compressed air into the downstream side yarn joint chamber 113a in the direction of twisting the first yarn end. The first and second downstream injection holes HA1 and HA2 are located on one side in the left-right direction with respect to the thread traveling path L when viewed from the front. The first downstream side injection hole HA1 is located on the upstream side (inside of the nozzle 110) of the second downstream side injection hole HA2 when viewed from the front. Each of the first and second downstream injection holes HA1 and HA2 draws compressed air P1 and P2 toward the edge of the downstream thread joint chamber 113a (that is, along the tangential direction) when viewed from the vertical direction, respectively. Inject (see FIG. 6). The cross-sectional shapes of the first and second passages 140a and 140b and the shapes of the first and second downstream injection holes HA1 and HA2 have a rectangular shape.

Further, the nozzle 110 is formed with a first passage 145a and a second passage 145b for supplying compressed air to the upstream thread joint chamber 113b. The first and second passages 145a and 145b are through holes leading to the upstream thread joint chamber 113b. The first and second passages 145a and 145b extend in an inclined manner inside the nozzle 110 following the V-shape of the groove 111. The first and second passages 145a and 145b are arranged in the vertical direction when viewed from the front, and are located on the other side in the left-right direction with respect to the thread traveling path L. The first passage 145a is located on the downstream side (inside the nozzle 110) of the second passage 145b when viewed from the front. The openings on the upstream side thread joint chamber 113b side of each of the first and second passages 145a and 145b constitute the first upstream side injection hole HB1 and the second upstream side injection hole HB2.

The first and second upstream injection holes HB1 and HB2 inject compressed air into the upstream yarn joint chamber 113b in the twisting direction of the second yarn end. The first and second upstream injection holes HB1 and HB2 are located on the other side in the left-right direction with respect to the thread traveling path L when viewed from the front. The first upstream side injection hole HB1 is located below the second upstream side injection hole HB2 (inside the nozzle 110) when viewed from the front. The first and second upstream injection holes HB1 and HB2 inject compressed air toward the edge of the upstream yarn joint chamber 113b (that is, along the tangential direction) when viewed from the vertical direction. The cross-sectional shapes of the first and second passages 145a and 145b and the shapes of the first and second upstream injection holes HB1 and HB2 have a rectangular shape.

The support block 120 is made of a metal or resin such as aluminum and has a substantially rectangular parallelepiped shape. The support block 120 is formed with a U-shaped opening 121 for accommodating the nozzle 110. 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 140a and 145a of the nozzle 110, and communicates with the first passages 140a and 145a. The second block passage 125b is a passage for circulating compressed air from the outside of the support block 120 to the second passages 140b and 145b of the nozzle 110, and communicates with the second passages 140b and 145b.

The control unit 96 is a computer composed of a CPU, a ROM, a RAM, and the like. The control of various operations in the control unit 96 is performed, for example, by loading a program stored in the ROM into the RAM and executing the program in the CPU. The control unit 96 may be configured as hardware such as an electronic circuit. The control unit 9 is composed of a part of the unit control unit 10.

The control unit 96 controls the opening and closing of the first solenoid valve 161 provided in the first air flow path (air flow path) 151 for guiding compressed air to the first downstream side injection hole HA1 and the first upstream side injection hole HB1. .. 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 the opening and closing of the second solenoid valve 162 provided in the second air flow path (air flow path) 152 for guiding the compressed air to the second downstream side injection hole HA2 and the second upstream side injection hole HB2. .. The second air passage 152 is formed of, for example, a tube or the like, and communicates with the second block passage 125b. Such a control unit 96 controls the timing of opening at least one of the first and second solenoid valves 161 and 162 from the closing to the opening, thereby controlling the first and second downstream injection holes HA1 and HA2, and At least one of the injection start timings of the compressed air from the first and second upstream injection holes HB1 and HB2 can be changed.

Specifically, since the control unit 96 controls the opening and closing of the first solenoid valve 161 of the first air flow path 151 leading to the first downstream side injection hole HA1 and the first upstream side injection hole HB1, the first downstream side injection hole HA1 and the first upstream side injection hole HB1. The injection start timing of the side injection hole HA1 and the injection start timing of the first upstream side injection hole HB1 are the same. Since the control unit 96 controls the opening and closing of the second solenoid valve 162 of the second air flow path 152 leading to the second downstream injection hole HA2 and the second upstream injection hole HB2, the control unit 96 of the second downstream injection hole HA2 The injection start timing and the injection start timing of the second upstream injection hole HB2 are the same. Then, the control unit 96 controls so that the opening / closing timing of the first solenoid valve 161 and the opening / closing timing of the second solenoid valve 162 are different from each other, and the injection start timing of the first downstream injection hole HA1 and the injection start timing of the second downstream injection hole HA2. The injection start timing of the first upstream side injection hole HB1 is made different from the injection start timing of the second upstream side injection hole HB2.

As described above, in the thread splicing device 26, compressed air is supplied from the first and second downstream side injection holes HA1 and HA2 and the first upstream side injection holes HB1 and HB2, respectively, at the appropriate injection start timing, in the downstream side thread splicing chamber 113a. And can be sprayed into each of the upstream thread joint chamber 113b. Therefore, compressed air can be applied to the first and second yarn ends to be spliced in various ways, and it is possible to deal with various yarns Y. It is possible to improve the strength and appearance quality of the seam of the spliced thread Y.

FIG. 7 is a graph showing the relationship between the blowing time of compressed air and the winding force. The spraying time is the time for continuing the injection of compressed air. The winding force is a force at which one of the untwisted first and second yarn ends winds around the other, and is also called a turning force. In the figure, M1 is a value relating to the winding force when compressed air is injected from the first downstream side injection hole HA1 and the first upstream side injection hole HB1. M2 is a value relating to the winding force when compressed air is injected from the second downstream side injection hole HA2 and the second upstream side injection hole HB2. The injection start timings of the second downstream side injection hole HA2 and the second upstream side injection hole HB2 are delayed from the injection start timings of the first downstream side injection hole HA1 and the first upstream side injection hole HB1. M3 is wound when compressed air is injected from the first downstream injection hole HA1 and the first upstream injection hole HB1 and then compressed air is injected from the second downstream injection hole HA2 and the second upstream injection hole HB2. It is a value related to force (= M1 + M2).

As shown in FIG. 7, the injection start timing of the second downstream injection hole HA2 and the second upstream injection hole HB2 and the injection start timing of the first downstream injection hole HA1 and the first upstream injection hole HB1 are shifted. As a result, the action of the compressed air injected later works before the winding force generated by the action of the compressed air injected earlier is greatly reduced. As a result, it is presumed that the action of the compressed air jetted earlier is effectively superimposed on the action of the compressed air jetted later, and a large winding force is obtained.

In the thread splicing device 26, the control unit 96 appropriately makes the injection start timings of the first and second downstream injection holes HA1 and HA2 different from each other, and injects the first and second upstream injection holes HB1 and HB2. The start timings can be appropriately different from each other. As a result, compressed air can be applied to the first and second yarn ends to be spliced in various ways.

In the thread joining device 26, the holes of the first and second downstream side injection holes HA1 and HA2 and the first upstream side injection holes HB1 and HB2 are rectangular. Thereby, the injection hole areas of the first and second downstream side injection holes HA1 and HA2 and the first upstream side injection holes HB1 and HB2 can be effectively expanded. It is possible to increase the winding force.

In the thread splicing device 26, the shape of the downstream thread splicing chamber 113a is biased to one side in the left-right direction with respect to the thread traveling path L, and the shape of the upstream thread splicing chamber 113b is the thread traveling path L. On the other hand, the shape is biased to the other side in the left-right direction. The first and second downstream injection holes HA1 and HA2 are located on one side in the left-right direction with respect to the thread traveling path L when viewed from the front, and the first and second upstream injection holes HB1 and HB2 are from the front. It is located on the other side of the thread traveling path L in the left-right direction. With such a configuration, one aspect of exhibiting the above-mentioned effect corresponding to various threads Y can be concretely realized.

In the thread splicing device 26, the first and second downstream side injection holes HA1 and HA2 inject compressed air (spray in the tangential direction) toward the edge of the downstream side thread splicing chamber 113a when viewed from the vertical direction. The first upstream side injection holes HB1 and HB2 inject compressed air (spray in the tangential direction) toward the edge of the upstream side thread joint chamber 113b when viewed from the vertical direction. In this case, the compressed air from the first and second downstream injection holes HA1 and HA2 effectively interact with each other at the time of thread splicing, and the compression from the first and second upstream injection holes HB1 and HB2 The air works effectively with each other, and a large winding force can be obtained (see FIG. 7). Incidentally, the thread splicing device 26 is suitable for splicing a short fiber thread Y such as cotton.

In the thread joining device 26, the control unit 96 controls the opening and closing of the first and second solenoid valves 161, 162 provided in the first and second air flow paths 151 and 152. In this case, the first and second solenoid valves 161, 162 can be used to control the injection start timing of the compressed air.

In the thread splicing device 26, the thread splicing portion 50 is a thread splicing nozzle structure having a nozzle 110 in which a downstream thread splicing chamber 113a and an upstream thread splicing chamber 113b are formed, and a support block 120 accommodating the nozzle 110. It is configured to include 100. In this case, one aspect of achieving the above-mentioned effect corresponding to various threads Y can be concretely realized.

The winder unit 3 includes a thread splicing device 26. Since the winder unit 3 is also provided with the thread splicing device 26, it can handle various threads Y.

In the present embodiment, the injection start timings of the first and second downstream side injection holes HA1 and HA2 and the first upstream side injection holes HB1 and HB2 may be freely set separately. Further, the time for blowing compressed air from the first and second downstream injection holes HA1 and HA2 and the first upstream injection holes HB1 and HB2 may be freely set separately. Further, the injection pressures of the compressed air from the first and second downstream injection holes HA1 and HA2 and the first upstream injection holes HB1 and HB2 may be freely set separately. Further, the stop timing of the compressed air injected in the untwisted portion 40 may be freely set. Such a configuration can be realized by using a known technique such as a solenoid valve or a pressure reducing valve.

FIG. 8 is a diagram showing an example of the injection timing condition of the compressed air in the yarn joining device 26. The time in the figure indicates that the time has passed as it goes to the right side. In the figure, the presence of the horizontal bar of the "untwisted portion" indicates that compressed air is injected at the untwisted portion 40, and the presence of the horizontal bar of the "first injection hole" indicates that the first downstream injection hole HA1. And the presence of the horizontal bar of the "second injection hole" indicates that the compressed air is injected from the first upstream side injection hole HB1 and the compressed air is injected from the second downstream side injection hole HA2 and the second upstream side injection hole HB2. Indicates that it is being injected. The numbers 1 to 4 in the figure are condition numbers. As shown in FIG. 8, in the yarn splicing device 26, compressed air may be injected at the untwisting portion 40 and the yarn splicing portion 50 according to the first to fourth injection timing conditions according to the condition numbers 1 to 4.

In the first injection timing condition, the injection stop timing of the untwisted portion 40 is set as the injection start timing of the first downstream side injection hole HA1 and the first upstream side injection hole HB1. In the first injection timing condition, the injection start timing of the second downstream side injection hole HA2 and the second upstream side injection hole HB2 is set with respect to the injection start timing of the first downstream side injection hole HA1 and the first upstream side injection hole HB1. I'm delaying. In the first injection timing condition, the injection stop timing of the first downstream side injection hole HA1 and the first upstream side injection hole HB1 and the injection stop timing of the second downstream side injection hole HA2 and the second upstream side injection hole HB2 are set. It's the same.

In the second injection timing condition, the injection start timing of the first downstream side injection hole HA1 and the first upstream side injection hole HB1 is delayed with respect to the injection stop timing of the untwisting unit 40. In the second injection timing condition, the injection start timing of the second downstream side injection hole HA2 and the second upstream side injection hole HB2 is set with respect to the injection stop timing of the first downstream side injection hole HA1 and the first upstream side injection hole HB1. I'm delaying.

Under the third injection timing condition, the injection start timing of the second downstream side injection hole HA2 and the second upstream side injection hole HB2 is delayed with respect to the injection stop timing of the untwisting unit 40. In the third injection timing condition, the injection start timing of the first downstream side injection hole HA1 and the first upstream side injection hole HB1 is set with respect to the injection start timing of the second downstream side injection hole HA2 and the second upstream side injection hole HB2. I'm delaying. In the third injection timing condition, the injection stop timing of the first downstream side injection hole HA1 and the first upstream side injection hole HB1 is set with respect to the injection stop timing of the second downstream side injection hole HA2 and the second upstream side injection hole HB2. I'm delaying.

In the fourth injection timing condition, the injection start timing of the second downstream side injection hole HA2 and the second upstream side injection hole HB2 is delayed with respect to the injection stop timing of the untwisting unit 40. In the fourth injection timing condition, the injection start timing of the first downstream side injection hole HA1 and the first upstream side injection hole HB1 is set with respect to the injection stop timing of the second downstream side injection hole HA2 and the second upstream side injection hole HB2. I'm delaying.

It is found that the yarn splicing device 26 can cope with the splicing of the yarn Y, which is a cotton denim yarn, by satisfying the above-mentioned first injection timing condition. That is, when the thread splicing device 26 is a device for splicing cotton denim yarn, the control unit 96 sets the injection start timing of the first downstream injection hole HA1 and the injection start timing of the first upstream injection hole HB1. , The injection start timing of the second downstream injection hole HA2 and the injection start timing of the second upstream injection hole HB2 may be earlier than the injection start timing. In this case, cotton denim yarn can be used. At this time, the first pressure of the compressed air of the first downstream injection hole HA1 and the first upstream injection hole HB1 is adjusted from the second pressure of the compressed air of the second downstream injection hole HA2 and the second upstream injection hole HB2. May also be low (eg, first pressure: 5.0 kg / cm ² , second pressure: 5.0 kg / cm ² ).

It is found that in the yarn splicing device 26, when the yarn Y of the material obtained by blending polyester and cotton is spliced, it can be dealt with by satisfying the above-mentioned second injection timing condition or fourth injection timing condition. At this time, the first pressure of the compressed air of the first downstream injection hole HA1 and the first upstream injection hole HB1 is adjusted from the second pressure of the compressed air of the second downstream injection hole HA2 and the second upstream injection hole HB2. May also be higher (eg, first pressure: 5.5 kg / cm ² , second pressure: 4.5 kg / cm ² ).

It is found that in the yarn splicing device 26, when the yarn Y, which is a purified cellulose fiber, is spliced, it can be dealt with by setting the above-mentioned third injection timing condition. That is, when the thread splicing device 26 is a device for splicing purified cellulose fibers, the control unit 96 sets the injection start timing of the second downstream injection hole HA2 and the injection start timing of the second upstream injection hole HB2. , The injection start timing of the first downstream injection hole HA1 and the injection start timing of the first upstream injection hole HB1 may be earlier than the injection start timing. In this case, it is possible to deal with purified cellulose fibers. At this time, the first pressure of the compressed air of the first downstream injection hole HA1 and the first upstream injection hole HB1 is set to the second pressure of the compressed air of the second downstream injection hole HA2 and the second upstream injection hole HB2. It may be the same (for example, first pressure: 3.0 kg / cm ² , second pressure: 3.0 kg / cm ² ).

[Second Embodiment]
Next, the second embodiment will be described. In the description of the present embodiment, the points different from those of the first embodiment will be described, and duplicate description will be omitted.

FIG. 9A is a cross-sectional view corresponding to FIG. 5A of the thread splicing device 226 according to the present embodiment. 9 (b) is a cross-sectional view taken along the line IX (b) -IX (b) of FIG. 9 (a). As shown in FIGS. 9A and 9B, the thread splicing device 226 replaces the first passage 140a and the first downstream injection hole HA1 with the first passage 240a and the first downstream injection hole. It differs from the first embodiment in that it is provided with HA3 and is provided with a first passage 245a and a first upstream injection hole HB3 in place of the first passage 145a and the first upstream injection hole HB1.

The first passage 240a is a through hole leading to the downstream thread joint chamber 113a, which supplies compressed air to the downstream thread joint chamber 113a. The first passage 240a is located on the other side in the left-right direction with respect to the thread traveling path L when viewed from the front. The first passage 240a is inclined and extends inside the nozzle 110 following the V-shape of the groove 111. The opening on the downstream side thread joint chamber 113a side of the first passage 240a constitutes the first downstream side injection hole HA3.

The first downstream injection hole HA3 injects compressed air into the downstream thread joint chamber 113a. The first downstream injection hole HA3 is located on the other side in the left-right direction with respect to the thread traveling path L when viewed from the front. The first downstream injection hole HA3 injects compressed air P1 toward the center of the downstream thread joint chamber 113a when viewed from the vertical direction (see FIG. 10). The cross section of the first passage 240a and the shape of the first downstream injection hole HA3 have a rectangular shape.

The first passage 245a is a through hole leading to the upstream thread joint chamber 113b, which supplies compressed air to the upstream thread joint chamber 113b. The first passage 245a is located on one side in the left-right direction with respect to the thread traveling path L when viewed from the front. The first passage 245a is inclined and extends inside the nozzle 110 following the V-shape of the groove 111. The opening on the upstream side thread joint chamber 113b side of the first passage 245a constitutes the first upstream side injection hole HB3.

The first upstream side injection hole HB3 injects compressed air into the upstream side thread joint chamber 113b. The first upstream side injection hole HB3 is located on one side in the left-right direction with respect to the thread traveling path L when viewed from the front. The first upstream side injection hole HB3 injects compressed air toward the center of the upstream side thread joint chamber 113b when viewed from the vertical direction. The cross section of the first passage 245a and the shape of the first upstream injection hole HB3 have a rectangular shape.

As described above, the thread splicing device 226 can also handle various threads Y. It is possible to improve the strength and appearance quality of the seam of the spliced thread Y. Incidentally, the yarn splicing device 226 is suitable for splicing a thick yarn Y with long fibers such as wool or hemp.

In the thread splicing device 226, the shape of the downstream thread splicing chamber 113a is biased to one side in the left-right direction with respect to the thread traveling path L, and the shape of the upstream thread splicing chamber 113b is the thread traveling path L. On the other hand, the shape is biased to the other side in the left-right direction. The second downstream injection hole HA2 and the first upstream injection hole HB3 are located on one side in the left-right direction with respect to the thread traveling path L when viewed from the front, and the first downstream injection hole HA3 and the second upstream injection The hole HB2 is located on the other side in the left-right direction with respect to the thread traveling path L when viewed from the front. With such a configuration, one aspect of exhibiting the above-mentioned effect corresponding to various threads Y can be concretely realized.

In the thread splicing device 226, the first downstream side injection hole HA3 injects compressed air (sprays to the center) toward the center of the downstream side thread splicing chamber 113a when viewed from the vertical direction. The second downstream injection hole HA2 injects compressed air (spraying in the tangential direction) toward the edge of the downstream thread joint chamber 113a when viewed from the vertical direction. The first upstream side injection hole HB3 injects compressed air toward the center of the upstream side thread joint chamber 113b when viewed from the vertical direction (spraying to the center). The second upstream side injection hole HB2 injects compressed air (spraying in the tangential direction) toward the edge of the upstream side thread joint chamber 113b when viewed from the thread traveling direction. As a result, the fibers at the ends of the first and second yarns are entangled by the injection of compressed air from the first downstream injection hole HA3 and the first upstream injection hole HB3, and the second downstream injection hole HA2 and the second upstream By injecting compressed air from the side injection hole HB2, the first and second yarn ends can be wound and the seams can be trimmed (finished).

In the thread splicing device 226, the control unit 96 sets the injection start timing of the first downstream injection hole HA3 and the injection start timing of the first upstream injection hole HB3 to the injection start timing of the second downstream injection hole HA2 and the second. It may be earlier than the injection start timing of the upstream side injection hole HB2. In this case, the above-mentioned action of entwining the fibers at the first and second yarn ends and winding the first and second yarn ends can be effectively exerted.

[Third Embodiment]
Next, the third embodiment will be described. In the description of the present embodiment, the points different from those of the second embodiment will be described, and duplicate description will be omitted.

FIG. 11A is a cross-sectional view corresponding to FIG. 5A of the thread splicing device 326 according to the present embodiment. 11 (b) is a cross-sectional view taken along the line XI (b) -XI (b) of FIG. 11 (a). As shown in FIGS. 11A and 11B, the thread splicing device 326 is different from the second embodiment in that it further includes a downstream injection receiving wall 331 and an upstream injection receiving wall 332.

The downstream injection receiving wall 331 is provided inside the downstream thread joint chamber 113a. The downstream injection receiving wall 331 is provided so that a part of the inner surface of the downstream thread joint chamber 113a is raised. Specifically, the downstream injection receiving wall 331 is provided on the inner surface of the downstream thread joint chamber 113a at a portion where compressed air is blown from the first downstream injection hole HA3. The downstream injection receiving wall 331 has a flat wall surface 331a facing the first downstream injection hole HA3.

The upstream side injection receiving wall 332 is provided inside the upstream side thread joint chamber 113b. The upstream side injection receiving wall 332 is provided so that a part of the inner surface of the upstream side thread joint chamber 113b is raised. Specifically, the upstream side injection receiving wall 332 is provided on the inner surface of the upstream side thread joint chamber 113b at a portion where compressed air is blown from the first upstream side injection hole HB3. The upstream side injection receiving wall 332 has a flat wall surface 332a facing the first upstream side injection hole HB3.

As described above, the thread splicing device 326 can also handle various threads Y. It is possible to improve the strength and appearance quality of the seam of the spliced thread Y. Further, since the thread splicing device 326 has the downstream injection receiving wall 331 and the upstream injection receiving wall 332, the compressed air from the first downstream injection hole HA1 and the first upstream injection hole HB1 is injected on the downstream side. It hits the receiving wall 331 and the upstream injection receiving wall 332 and diffuses (see FIG. 12). As a result, compressed air is injected (sprayed to the center) from the first downstream injection hole HA3 and the first upstream injection hole HB3 toward the center of the downstream thread joint chamber 113a and the upstream thread joint chamber 113b. The above-mentioned action of entwining the fibers at the end of the second yarn becomes remarkable.

[Fourth Embodiment]
Next, the fourth embodiment will be described. In the description of the present embodiment, the points different from those of the third embodiment will be described, and duplicate description will be omitted.

FIG. 13 (a) is a cross-sectional view corresponding to FIG. 5 (a) of the thread splicing device 426 according to the present embodiment. FIG. 13 (b) is a cross-sectional view taken along the line XIII (b) -XIII (b) of FIG. 13 (a). As shown in FIGS. 13 (a) and 13 (b), the thread splicing device 426 has a second passage 140b and a second downstream injection hole HA2 (FIG. 11) that supply compressed air to the downstream thread splicing chamber 113a. The third embodiment is different from the above-mentioned third embodiment in that the second passage 440b and the second downstream injection hole HA4 are provided instead of the second passage 440b. The yarn splicing device 426 replaces the second passage 145b and the second upstream injection hole HB2 (see FIG. 11) for supplying compressed air to the upstream yarn splicing chamber 113b, and instead of the second passage 445b and the second upstream injection hole. It differs from the above-mentioned third embodiment in that it includes HB4. The third embodiment is described above in that the thread splicing device 426 includes a downstream injection receiving wall 431 and an upstream injection receiving wall 432 in place of the downstream injection receiving wall 331 and the upstream injection receiving wall 332 (see FIG. 11). Different from the form.

The second passage 440b is a through hole leading to the downstream thread joint chamber 113a, which supplies compressed air to the downstream thread joint chamber 113a. The second passage 440b is located on the other side (right side in the drawing) in the left-right direction with respect to the thread traveling path L when viewed from the front. The second passage 440b is inclined and extends inside the nozzle 110 following the V-shape of the groove 111. The second passage 440b is arranged on the downstream side of the first passage 240a when viewed from the front. The opening on the downstream side thread joint chamber 113a side of the second passage 440b constitutes the second downstream side injection hole HA4.

The second downstream injection hole HA4 injects compressed air into the downstream thread joint chamber 113a. The second downstream injection hole HA4 is located on the other side in the left-right direction with respect to the thread traveling path L when viewed from the front. The second downstream injection hole HA4 injects compressed air toward the center of the downstream thread joint chamber 113a when viewed from the vertical direction. The cross section of the second passage 440b and the shape of the second downstream injection hole HA4 have a rectangular shape. The second passage 440b and the second downstream injection hole HA4 communicate with the second air flow path 152 via the second solenoid valve 162.

The second passage 445b is a through hole leading to the upstream thread joint chamber 113b, which supplies compressed air to the upstream thread joint chamber 113b. The second passage 445b is located on one side (left side in the drawing) in the left-right direction with respect to the thread traveling path L when viewed from the front. The second passage 445b is inclined and extends inside the nozzle 110 following the V-shape of the groove 111. The second passage 445b is arranged on the upstream side of the first passage 245a when viewed from the front. The opening on the upstream side thread joint chamber 113b side of the second passage 445b constitutes the second upstream side injection hole HB4.

The second upstream side injection hole HB4 injects compressed air into the upstream side thread joint chamber 113b. The second upstream side injection hole HB4 is located on one side in the left-right direction with respect to the thread traveling path L when viewed from the front. The second upstream side injection hole HB4 injects compressed air toward the center of the upstream side thread joint chamber 113b when viewed from the vertical direction. The cross section of the second passage 445b and the shape of the second upstream injection hole HB4 have a rectangular shape. The second passage 445b and the second upstream side injection hole HB4 communicate with the second air flow path 152 via the second solenoid valve 162.

The downstream injection receiving wall 431 is provided inside the downstream thread joint chamber 113a. The downstream injection receiving wall 431 is provided on the inner surface of the downstream thread joint chamber 113a at a portion where compressed air is blown from the first downstream injection hole HA3 and the second downstream injection hole HA2. The downstream injection receiving wall 431 is provided so that a region extending from the upper end to the lower end of the inner surface of the downstream thread joint chamber 113a is raised. The downstream injection receiving wall 431 has a flat wall surface 431a facing the first downstream injection hole HA3 and the second downstream injection hole HA2.

The upstream side injection receiving wall 432 is provided inside the upstream side thread joint chamber 113b. The upstream side injection receiving wall 432 is provided on the inner surface of the upstream side thread joint chamber 113b at a portion where compressed air is blown from the first upstream side injection hole HB3 and the second upstream side injection hole HB4. The upstream side injection receiving wall 432 is provided so that a region extending from the upper end to the lower end of the inner surface of the upstream side thread joint chamber 113b is raised. The upstream side injection receiving wall 432 has a flat wall surface 432a facing the first upstream side injection hole HB3 and the second upstream side injection hole HB4.

As described above, the thread splicing device 426 can also handle various threads Y. It is possible to improve the strength and appearance quality of the seam of the spliced thread Y. In particular, the yarn splicing device 426 is effective for dealing with yarn Y, which is a long fiber single yarn and a long fiber twin yarn.

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

The above embodiment includes the first downstream side injection holes HA1 and HA3 and the second downstream side injection holes HA2 as a plurality of downstream side injection holes, but the number of downstream side injection holes may be three or more. .. The above embodiment includes the first upstream side injection holes HB1 and HB3 and the second upstream side injection holes HB2 as a plurality of upstream side injection holes, but the number of upstream side injection holes may be three or more. ..

In the above embodiment, the hole shape of the first downstream side injection hole HA1 and the hole shape of the second downstream side injection hole HA2 may be different. In the above embodiment, the hole shape of the first upstream side injection hole HB1 and the hole shape of the second upstream side injection hole HB2 may be different. In this case, it is possible to correspond to various threads Y according to the difference in each hole shape.

In the above embodiment, one of the hole shape of the first downstream injection hole HA1 and the hole shape of the second downstream injection hole HA2 is a polygonal shape, and the hole shape of the first downstream injection hole HA1 and the first. 2 The other of the hole shape of the downstream injection hole HA2 may be circular. One of the hole shape of the first upstream injection hole HB1 and the hole shape of the second upstream injection hole HB2 is polygonal, and the hole shape of the first upstream injection hole HB1 and the second upstream injection hole The other of the hole shapes of HB2 may be circular. In this case, one aspect of achieving the above-mentioned effect corresponding to various threads Y can be concretely realized.

In the above embodiment, the thread splicing nozzle structure 100 performs thread splicing by injecting compressed air, and has a nozzle 110 in which a downstream thread splicing chamber 113a and an upstream thread splicing chamber 113b are formed, and a nozzle 110. A support block 120 for accommodating the above. The nozzle 110 includes first and second downstream injection holes for injecting compressed air into the downstream yarn joint chamber 113a, and first and second upstream injection holes for injecting compressed air into the upstream yarn joint chamber 113b. Has. The hole shape of the first downstream side injection hole and the hole shape of the second downstream side injection hole are different, and the hole shape of the first upstream side injection hole and the hole shape of the second upstream side injection hole may be different.

In this case, compressed air may be injected into the downstream thread joint chamber 113a and the upstream thread joint chamber 113b from the first and second downstream injection holes and the first and second upstream injection holes, respectively. it can. The shapes of the first downstream injection hole and the second downstream injection hole are different from each other, and the shapes of the first upstream injection hole and the second upstream injection hole are different from each other. It is possible to correspond to various threads Y depending on the above.

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.

3 ... Winder unit (winding device), 26, 226, 326, 426 ... Thread splicing device, 50 ... Thread splicing part, 96 ... Control unit, 100 ... Thread splicing nozzle structure, 110 ... Nozzle, 113a ... Downstream yarn Joint chamber, 113b ... Upstream thread joint chamber, 120 ... Support block, 151 ... First air flow path (air flow path), 152 ... Second air flow path (air flow path), 161 ... First solenoid valve (solenoid valve) Valve), 162 ... Second solenoid valve (solenoid valve), 331, 431 ... Downstream injection receiving wall, 331a, 332a, 431a, 432a ... Wall surface, 332, 432 ... Upstream injection receiving wall, HA1, HA3 ... First Downstream injection holes (downstream injection holes), HA2, HA4 ... 2nd downstream injection holes (downstream injection holes), HB1, HB3 ... 1st upstream injection holes (upstream injection holes), HB2, HB4 ... 2 Upstream injection hole (upstream injection hole), L ... Thread running path.

Claims (16)

A thread splicing part that splics threads by injecting compressed air,
A thread splicing device including a control unit that controls injection of compressed air in the thread splicing portion.
The thread joint is
An upstream thread joint chamber and a downstream thread joint chamber that are adjacent to each other in the thread running direction and communicate with each other,
A plurality of upstream injection holes for injecting compressed air into the upstream yarn joint chamber,
It has a plurality of downstream injection holes for injecting compressed air into the downstream yarn joint chamber.
The control unit can change at least one of the injection start timings of the compressed air from each of the plurality of upstream side injection holes and the plurality of downstream side injection holes. The plurality of upstream side injection holes include a first upstream side injection hole and a second upstream side injection hole.
The plurality of downstream injection holes include a first downstream injection hole and a second downstream injection hole.
The control unit
The injection start timing of the first upstream side injection hole and the injection start timing of the second upstream side injection hole are made different.
The thread splicing device according to claim 1, wherein the injection start timing of the first downstream side injection hole is different from the injection start timing of the second downstream side injection hole. The hole shape of the first upstream side injection hole and the hole shape of the second upstream side injection hole are different.
The thread splicing device according to claim 2, wherein the hole shape of the first downstream injection hole and the hole shape of the second downstream injection hole are different. One of the hole shape of the first upstream side injection hole and the hole shape of the second upstream side injection hole is a polygonal shape.
The other of the hole shape of the first upstream side injection hole and the hole shape of the second upstream side injection hole is circular.
One of the hole shape of the first downstream side injection hole and the hole shape of the second downstream side injection hole is a polygonal shape.
The thread splicing device according to claim 3, wherein the other of the hole shape of the first downstream injection hole and the hole shape of the second downstream injection hole is circular. The shape of the upstream thread joint chamber is biased to one side in a predetermined direction orthogonal to the thread traveling direction with respect to the thread traveling path.
The shape of the downstream thread joint chamber is biased toward the other side in the predetermined direction with respect to the thread traveling path.
The first upstream side injection hole and the second upstream side injection hole are located on one side of the yarn running path in the predetermined direction when viewed from the yarn running direction and the direction orthogonal to the predetermined direction.
The first downstream injection hole and the second downstream injection hole are located on the other side of the yarn traveling path in the predetermined direction when viewed from the yarn traveling direction and the direction orthogonal to the predetermined direction. The thread splicing device according to any one of 2 to 4. The first upstream side injection hole and the second upstream side injection hole inject compressed air toward the edge of the upstream side thread joint chamber when viewed from the thread running direction.
The thread splicing according to claim 5, wherein the first downstream side injection hole and the second downstream side injection hole inject compressed air toward the edge of the downstream side thread splicing chamber when viewed from the thread traveling direction. apparatus. A device for splicing cotton denim threads
The control unit
The injection start timing of the first upstream side injection hole and the injection start timing of the first downstream side injection hole are set closer to the injection start timing of the second upstream side injection hole and the injection start timing of the second downstream side injection hole. , Accelerate, the thread splicing device according to claim 5 or 6. A device for splicing purified cellulose fibers.
The control unit
The injection start timing of the second upstream side injection hole and the injection start timing of the second downstream side injection hole are set closer to the injection start timing of the first upstream side injection hole and the injection start timing of the first downstream side injection hole. , Accelerate, the thread splicing device according to claim 5 or 6. The shape of the upstream thread joint chamber is biased to one side in a predetermined direction orthogonal to the thread traveling direction with respect to the thread traveling path.
The shape of the downstream thread joint chamber is biased toward the other side in the predetermined direction with respect to the thread traveling path.
The second upstream side injection hole and the first downstream side injection hole are located on one side of the yarn running path in the predetermined direction when viewed from the yarn running direction and the direction orthogonal to the predetermined direction.
The claim that the first upstream injection hole and the second downstream injection hole are located on the other side of the yarn traveling path in the predetermined direction when viewed from the yarn traveling direction and the direction orthogonal to the predetermined direction. The thread splicing device according to any one of 2 to 4. The first upstream side injection hole injects compressed air toward the center of the upstream side thread joint chamber when viewed from the thread running direction.
The second upstream side injection hole injects compressed air toward the edge of the upstream side thread joint chamber when viewed from the thread running direction.
The first downstream injection hole injects compressed air toward the center of the downstream yarn joint chamber when viewed from the yarn traveling direction.
The thread splicing device according to claim 9, wherein the second downstream side injection hole injects compressed air toward the edge of the downstream side thread splicing chamber when viewed from the thread traveling direction. The upstream-side yarn joint chamber has an upstream-side injection receiving wall which is provided so that a part of its inner surface is raised and has a wall surface facing the first upstream-side injection hole.
The thread according to claim 10, wherein the downstream thread joint chamber is provided so as to have a part of its inner surface raised, and has a downstream injection receiving wall having a wall surface facing the first downstream injection hole. Joint device. The control unit
The injection start timing of the first upstream side injection hole and the injection start timing of the first downstream side injection hole are set closer to the injection start timing of the second upstream side injection hole and the injection start timing of the second downstream side injection hole. , Accelerate, the thread splicing device according to claim 10 or 11. The control unit controls the opening and closing of solenoid valves provided in the plurality of upstream injection holes and the air flow path for guiding compressed air to the plurality of downstream injection holes, according to any one of claims 1 to 12. The thread splicing device according to. The thread splicing portion includes a thread splicing nozzle structure having a thread splicing chamber on the upstream side, a nozzle in which the thread splicing chamber on the downstream side is formed, and a support block for accommodating the nozzle. The thread splicing device according to any one of claims 1 to 13. A take-up device comprising the yarn splicing device according to any one of claims 1 to 14. A thread splicing nozzle structure that splics threads by injecting compressed air.
A nozzle in which an upstream yarn splicing chamber and a downstream yarn splicing chamber are formed that are adjacent to each other in the yarn traveling direction and communicate with each other.
A support block for accommodating the nozzle is provided.
The nozzles include first and second upstream injection holes for injecting compressed air into the upstream yarn joint chamber, and first and second downstream injection holes for injecting compressed air into the downstream yarn joint chamber. Have,
The hole shape of the first upstream side injection hole and the hole shape of the second upstream side injection hole are different.
A thread joint nozzle structure in which the hole shape of the first downstream injection hole and the hole shape of the second downstream injection hole are different.

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