JP2012101908A - Yarn splicing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn splicing device which increases a success rate of yarn splicing work and improves the strength of a spliced part of yarn.SOLUTION: The yarn splicing device is provided with a supporting part 1 supporting the traveling of threads 10 to be spliced, a holding part 2 formed in a movable manner relatively to the supporting part 1 to grasp strands 15a to splice pulled out of a spare cake 15, and a jetting part 3 jetting a gas flow to the strands 15a. A work space is formed of the holding part 2 abutting on the supporting part 1, and yarn splicing is conducted in the work space by entangling the strands 15a with the threads 10 by the gas flow from the jetting part 3. The yarn splicing device has an adjusting means 4 adjusting the state of the strands 15a before the splicing work.

Description

  The present invention relates to a yarn joining device for joining yarns, and more particularly to a yarn joining device for joining yarns made of glass fibers.

  Glass fibers used as raw materials for industrial products such as printed wiring boards and glass fiber reinforced plastics (FRP, FRTP) are several glass fiber monofilaments with a diameter of several μm to several tens of μm obtained by spinning molten glass. Ten to several thousand bundles are formed into glass fiber bundles, which are once wound on a drum and processed into a state called a cake. Thereafter, the glass fiber bundle is unwound from the cake and shipped in the form of a glass yarn in which the glass fiber bundle is twisted or in the form of a glass roving in which a plurality of glass fiber bundles are further bundled and combined.

  Here, in the manufacturing process of glass roving made of yarns in which strands (glass fiber bundles) drawn from a plurality of cakes are combined, for example, when the strands wound around the cake are used up and switched to a new cake In addition, when the strand pulled out from the cake is unexpectedly cut, the number of strands constituting the yarn is insufficient, so that a reduced diameter portion in which a portion of the yarn is thin may occur. Therefore, in order to maintain the quality of the glass roving, a yarn splicing operation for recovering the reduced diameter portion of the yarn is required. In this yarn splicing operation, a spare strand is entangled with the reduced diameter portion of the yarn. Thereby, the yarn returns to the original state.

  Although the above-described yarn joining operation may be performed manually by an operator, a yarn joining device that automates the yarn joining operation has been developed (see, for example, Patent Document 1). According to Patent Document 1, it is said that the automatic yarn joining device reduces the burden on the worker and can greatly improve the efficiency of the yarn joining operation as compared with the manual operation.

  In addition, when performing the yarn joining operation, there is also a technique for setting the intersection of the centers of the pair of air injection holes in the splicer for performing yarn joining to be eccentric to the slit side in order to increase the strength of the yarn joining portion ( For example, see Patent Document 2). According to the technique of Patent Document 2, since the swirling flow of air in the splicer becomes a complicated flow, and the fibers are sufficiently loosened and twisted, the strength of the yarn joining portion can be improved. Yes.

JP-A-4-66480 Japanese Patent Laid-Open No. 7-125931

  However, there are several problems with the above prior art. In the automatic yarn splicing device of Patent Document 1, when executing the yarn splicing operation of the strand (old yarn) drawn from the old cake before replacement and the strand (new yarn) drawn from the new cake after replacement, A hook provided in the device operates to pull down the new thread. For this reason, a strong tension is likely to act on the new yarn. In particular, glass fibers are generally more brittle than synthetic fibers, so if the strands are strongly pulled down, they may be cut as they are. Therefore, in the yarn splicing device of Patent Document 1, particularly when glass fiber is the target, it is difficult to reliably perform the splicing of the old yarn and the new yarn, and there is room for further improvement.

  In the technique of Patent Document 2, when the two yarns are joined together, the yarn is stretched by further pulling the lever after pressing the yarn with a clamp so as not to slip. Therefore, in the technique of Patent Document 2, a strong tension acts on the yarn, and it is considered that cutting is easy when a general glass fiber is used. Note that even if the swirl flow inside the air injection hole is complicated, there is a high probability that each yarn will be cut before air injection. Cannot be expected.

  Thus, at present, a technique for preventing the strand from being cut when performing the yarn joining operation and performing the yarn joining reliably has not been developed yet. The present invention has been made in view of the above problems, and an object of the present invention is to provide a yarn joining device that increases the success rate of the yarn joining operation and improves the strength of the yarn joining portion.

The characteristic configuration of the yarn joining device according to the present invention for solving the above problems is as follows:
A support part for supporting the running of the yarns to be joined,
A gripping part configured to be movable relative to the support part and gripping the joining strand drawn from the preliminary cake;
An injection unit for injecting a gas flow to the strand;
With
A working space is formed by the gripping portion coming into contact with the support portion, and the yarn joining device performs piecing by tangling the strand to the yarn by the gas flow from the injection portion in the working space. ,
An adjustment means for adjusting the state of the strand before the yarn joining operation is provided.

As described in the above problem, in the present situation, there is a problem that the strand is easily cut when performing the yarn joining operation. In particular, when performing fiber splicing work on glass fibers, glass fibers are generally more brittle than synthetic fibers. It was difficult to do. One of the causes that the strand breaks when performing the yarn splicing operation is that a strong tension acts on the strand. Therefore, in order to prevent strand breakage, it is effective to optimize the strand arrangement while reducing the tension acting on the strand as much as possible.
Therefore, the present inventors diligently studied, and in the yarn joining device, it is possible to optimize the tension acting on the strands and the arrangement of the strands by newly providing an adjusting means for adjusting the state of the strands before the yarn joining operation. I understood. For example, it is effective to adjust the state of the strand so as to reduce the tension acting on the strand by the adjusting means.
In the yarn splicing device of this configuration, since the adjusting means for adjusting the state of the strand before the yarn splicing operation is provided as described above, it is possible to prevent a strong tension from acting on the strand. As a result, the strand is prevented from being cut, and the piecing can be reliably performed. Further, since the arrangement of the strands is optimized, the strength of the yarn joining portion can be improved while the strands are entangled in an optimum state with respect to the yarn.

  In the yarn splicing device according to the present invention, the adjusting means is preferably a relaxing means for loosening the strand.

As described above, the strand is cut when the yarn joining operation is performed because a strong tension acts on the strand.
In the yarn splicing device of this configuration, the adjusting means is a relaxing means for loosening the strand, so that the strand is bent and the tension acting on the strand can be made substantially zero. As a result, the strand is prevented from being cut, and the piecing can be performed more reliably.

  In the yarn splicing device according to the present invention, it is preferable that the adjusting unit is a positioning unit that aligns the position of the strand with the grip portion.

When performing the yarn splicing operation, it is desirable to position the strand directly above the longitudinal direction of the running yarn in order to entangle the strand in an optimum state with respect to the yarn. For this purpose, it is necessary to align the position of the strand with respect to the grip portion for gripping the strand. If the positions do not match, there is a possibility that a strong tension acts on the strand and the strand is cut or the strand does not reach the yarn. Moreover, if the gas flow is jetted in a state where the strands are not aligned, the length of the portion of the strand that is entangled with the yarn may be insufficient or the entanglement may be insufficient. In such a case, the yarn joining operation cannot be executed reliably, and the strength of the yarn joining portion may be insufficient.
In the case of the yarn splicing device of this configuration, since the adjusting means is a positioning means for aligning the position of the strand with the gripping portion, the strand gripped by the gripping portion is forcibly pulled or the length of the entangled portion of the strand There is no risk of shortage. Furthermore, the strands gripped by the gripping portion can be smoothly supplied to the yarn running on the support portion. As a result, the strand can be entangled in an optimum state with respect to the yarn, so that the piecing can be performed more reliably. Moreover, the workability | operativity of a yarn splicing, efficiency, and operativity can be improved by aligning a strand to the optimal position.

  In the yarn splicing device according to the present invention, the gripping portion maintains a gripping force of a predetermined level or higher when gripping the strand, and a gripping force is maintained during an operation requiring the yarn splicing operation. It is preferable to be configured to weaken.

  With the yarn splicing device having this configuration, the strand can be securely held on the grip portion in preparation for the yarn splicing operation in normal times. Moreover, at the time of operation | movement, the said strand can be fastened to a holding part to such an extent that the movement of a strand is not disturbed, ensuring the strand of the length required for a yarn splicing. That is, the tension acting on the strand only during operation can be weakened. Therefore, the strand is prevented from being cut, and the piecing can be performed more reliably.

In the yarn splicing device according to the present invention, it is preferable that the gripping part grips the strand with a gripping force of 0.1 to 1.1 g weight / mm ² .

With the yarn splicing device of this configuration, the lower limit value of the gripping force of the gripping portion is set to 0.1 g weight / mm ² , so that the strand does not fall off from the gripping portion. On the other hand, if the upper limit value of the gripping force of the gripping portion is 1.1 g weight / mm ² , the movement of the strand when performing the yarn joining operation is not disturbed. As a result, the strand is prevented from being cut, and the piecing can be performed more reliably.

  In the yarn splicing device according to the present invention, it is preferable that disturbance means for disturbing the gas flow is provided in the work space.

  In the case of the yarn splicing device of this configuration, when a gas flow for entanglement of the strands with the yarn is injected, the gas flow inside the working space is disturbed by the disturbing means for disturbing the gas flow provided inside the working space. Becomes a complex turbulent flow. As a result, since the strand can be sufficiently entangled with the yarn, the strength of the yarn joining portion is improved.

  In the yarn splicing device according to the present invention, it is preferable that the gas flow from the injection unit is configured to directly act on the strand.

  With the yarn splicing device of this configuration, the gas flow directly acts on the strand (that is, hits directly). For this reason, the strand moves violently inside the work space. As a result, the entanglement between the yarn and the strand is sufficient, and the yarn joining operation can be performed efficiently. Further, the yarn joining portion formed in this way has sufficient strength.

FIG. 1 is a schematic diagram showing the overall configuration of the yarn joining device of the present invention. FIG. 2 is a schematic cross-sectional view of the grip portion. FIG. 3 is a side view of the hanger. FIG. 4 is a main part configuration diagram of the yarn joining device of the present invention for explaining the yarn joining operation in stages. FIG. 5 is a schematic cross-sectional view showing the structure of the grip portion and the support portion that are in contact with each other during the yarn joining operation.

  Hereinafter, an embodiment of a yarn splicing device of the present invention will be described with reference to FIGS. However, the present invention is not intended to be limited to the configurations described in the embodiments and drawings described below.

<Thread joining device>
When a glass roving is manufactured by winding a yarn formed by combining a plurality of glass fiber bundles (hereinafter referred to as “strands”), in the present embodiment, four cakes 11, 12, 13, and 14 are used. The strands 11a, 12a, 13a, and 14a are drawn out from the yarn, and the yarn 10 obtained by bundling them at the first joining portion X1 and winding them together is wound up by the winding device 60. The yarn 10 may be referred to as “main line”. The strands 11a, 12a, 13a, and 14a are inspected for the presence of yarn breakage by the infrared sensors 31, 32, 33, and 34, respectively. Here, “thread break” includes a blank state when a strand is used up and switched to a new cake, and a state where a strand drawn from the cake is cut. In addition to the cakes 11, 12, 13, and 14, a spare cake 15 around which a spare strand 15 a for piecing (for recovery) is wound is provided. The spare strand 15 a drawn from the preliminary cake 15 is also monitored by the infrared sensor 35. The spare strand 15a is in a standby state through the first junction X1. The reason why the spare strand 15a is passed through the first joining portion X1 is that it will be used as a normal strand constituting the main line in the future. Here, for example, when the strand 11a drawn from the cake 11 is cut, the number of strands constituting the yarn 10 is reduced from four to three, and thus the yarn 10 becomes thin. This state is referred to as a “reduced diameter portion”. When a reduced diameter portion is generated in the yarn 10, a yarn joining operation for restoring the reduced diameter portion to the original state is executed. Although details will be described later, when the infrared sensor 31 detects that the strand 11a has been cut, the spare strand 15a drawn from the preliminary cake 15 is entangled with the yarn 10. Thereby, since the strand which comprises the thread | yarn 10 increases from 3 to 4, the diameter-reduced part which had generate | occur | produced in the thread | yarn 10 is recovered to the original state. The spare strand 15a used for the yarn splicing thereafter constitutes a main line as a normal strand. Moreover, the cake 11 which supplies the cut | disconnected strand 11a is utilized as a preliminary | backup cake this time. The configuration of the yarn joining device 100 of the present invention for performing such a yarn joining operation will be described below.

  FIG. 1 is a configuration diagram showing the overall configuration of a yarn joining device 100 of the present invention. The yarn joining device 100 includes, as main components, a support portion 1, a grip portion 2, an injection portion 3, and a hanger 4 as an adjusting means.

  The support part 1 supports the traveling of the yarn 10 to be joined. “Supporting the running of the yarn” means that the yarn 10 supports the running of the support portion 1 smoothly. Accordingly, it is not necessary for the yarn 10 to directly contact the support portion 1. The support part 1 is provided with an injection part 3 for injecting a gas flow to the strand 15a when in contact with a grip part 2 described later. A gas supply source 50 for supplying air, nitrogen gas or the like is connected to the injection unit 3. A gas cylinder, a compressor, or the like is used for the gas supply source 50. Further, at least a part of a work space for performing a yarn splicing operation described later is formed in the support portion 1. When the work space is formed, a gas flow is injected from the injection unit 3 so that the strands 15a are intertwined with the yarn 10.

FIG. 2 is a schematic cross-sectional view of the grip portion 2. The grip part 2 grips the strands 15 a drawn from the preliminary cake 15. Specifically, the strand 15a is wound several times around the block-shaped gripping member 2a provided substantially at the center of the gripping portion 2 when viewed from the traveling direction of the yarn 10 shown in FIG. Is used to temporarily fix the strand 15a. As the fastener 90, for example, a magnet device capable of fixing the strand 15a by magnetic force can be used. In particular, a metal cylinder 91 that is in contact with the gripping member 2a as shown in FIG. In this case, a plurality of donut-shaped ring magnets 92 are stacked inside the cylinder 91 to adjust the magnetic force. By changing the number of stacked ring magnets 92, the magnetic force (gripping force) can be easily changed. Therefore, if the ring magnet 92 is used, the gripping force of the gripper ² can be adjusted to a suitable range of 0.1 to 1.1 g weight / mm ² . If the gripping force is 0.1 g weight / mm ² or more, the strand 15a will not fall off the grip portion 2. On the other hand, if the gripping force is 1.1 g weight / mm ² or less, the movement of the strand 15a when performing the yarn joining operation is not disturbed. As a result, it is possible to prevent the strand 15a from being cut at an early stage and to perform yarn joining more reliably.

  Moreover, although the holding | grip part 2 is standing by in the position (in FIG. 1, just above the support part 1) spaced apart from the support part 1 at the normal time when the yarn splicing work is not required, a yarn splicing work is required. It is configured to be relatively movable to a position where it abuts against the support portion 1 during operation. Further, a part of the work space for performing the yarn joining operation is formed inside the grip portion 2, and when the grip portion 2 comes into contact with the support portion 1, a complete work space is formed.

  It is also effective to configure the gripping part 2 so that the gripping force is greater than a predetermined value during normal operation and the gripping force is weakened during yarn splicing work. In this case, at the normal time, the strand 15a can be securely held on the grip portion 2 in preparation for the yarn joining operation. Moreover, at the time of operation | movement, the said strand 15a can be fastened to the holding part 2 to such an extent that the movement of the strand 15a is not disturbed, ensuring the strand 15a of the length required for a splicing. That is, the tension acting on the strand 15a only during operation can be weakened. As a result, the strand 15a is prevented from being cut, and the yarn joining can be performed more reliably. For example, the gripping portion 2 that makes the gripping force variable can use the lever principle, and the action point is in a state of strongly pressing the strand 15a at the normal time. It can be realized as a configuration that weakens the pressing force.

  The hanger 4 functions as an adjusting means for adjusting the state of the strand 15a before the yarn joining operation. The adjustment means includes, for example, a function of loosening the strand 15a (relaxation means) and a function of aligning the position of the strand 15a with the grip portion 2 (positioning means).

  When the hanger 4 functions as a relaxation means, the strand 15a is loosely passed through the hanger 4 to relax the strand 15a and cause bending. As shown in the side view of FIG. 3, the hanger 4 includes a rotatable base portion 40 and a hooking portion 41 through which the strand 15 a is passed. The hooking part 41 before the rotation is indicated by a solid line, and the hooking part 41 after the rotation is indicated by a broken line. When the hooking portion 41 rotates in accordance with the yarn joining operation, the strand 15a is detached from the hooking portion 41. By such an operation of the hanger 4, the tension acting on the strand 15a can be made substantially zero. As a result, the strand 15a is prevented from being cut, and the yarn joining can be performed more reliably. Note that the operation mechanism of the hanger 4 is not limited to the rotation mechanism described above, and for example, a configuration in which the base 40 is slid in the vertical direction may be employed.

  When the hanger 4 functions as an alignment means, the strand 15a immediately after passing through the hanger 4 is connected to the strand 15a wound around the gripping member 2a provided at the approximate center of the gripping portion 2 at the shortest distance. In addition, the position of the hanger 4 is adjusted. Optimally, the hanger 4 is aligned so that the strand 15a and the yarn 10 are substantially overlapped when viewed from above. If adjusted to such a position, there is no possibility that the strand 15a gripped by the grip portion 2 will be forcibly pulled or the length of the entangled portion of the strand 15a used in the yarn joining operation will be insufficient. Furthermore, by adjusting the position of the hanger 4 optimally, it is set so that the strand 15a is positioned directly above the running yarn 10 in the working space for performing the splicing operation. Can do. As a result, the strand 15a can be sufficiently entangled with the yarn 10 by making maximum use of the swirl flow generated inside the work space during the yarn splicing operation. As a result, the strength of the yarn joining portion can be improved. Further, by executing the alignment, the success rate of the yarn splicing can be increased, and the useless movement of the strand 15a can be reduced.

  Even when the state of the strand 15a is adjusted by the hanger 4, for example, if the drawing of the strand 15a from the preliminary cake 15 is delayed, a strong tension may act on the strand 15a and the strand 15a may be cut. Therefore, it is also effective to bend the strand 15a between the hanger 4 and the preliminary cake 15. Thereby, it is possible to prevent the tension from acting suddenly on the waiting strand 15a.

<Operation of splicing work>
Next, the operation of the yarn joining operation executed using the yarn joining device 100 of the present invention will be specifically described. FIG. 4 is a main part configuration diagram of the yarn joining device 100 of the present invention for explaining the yarn joining operation step by step.

  FIG. 4A shows a normal operation in which no yarn splicing operation has occurred, and the grip portion 2, the hanger 4, and the injection portion 3 are in a standby state. The normal yarn 10 constituting the main line passes through the support portion 1 and travels toward the winding device 60 (not shown). The gripping member 2 a of the gripping part 2 is gripped by a fastener 90 such as a magnet device with a gripping force that does not cause the strand 15 a for piecing to fall off, and the gripping part 2 is in a state of being separated from the support part 1. Waiting. The strands 15a are passed through the hangers 4, and sufficient bending occurs. The supply of gas from the gas supply source 50 to the injection unit 3 is stopped.

  FIG. 4B shows a state in which the reduced diameter portion 70 is generated in the yarn 10. When thread breakage occurs in at least one of the strands 11a, 12a, 13a, and 14a shown in FIG. 1, the number of strands constituting the main line is reduced, and a reduced diameter portion 70 in which the yarn 10 is thin is generated. To do. The infrared sensors 31, 32, 33, and 34 detect the breakage of each strand, and transmit a detection signal to a computer (not shown) provided separately. At that time, the computer instructs the yarn joining device 100 to perform the yarn joining operation. At the same time, preparation for supplying gas from the gas supply source 50 begins. The detection signals from the infrared sensors 31, 32, 33, and 34 can be directly transmitted to each unit that performs the yarn joining operation without using a computer.

  FIG. 4C shows a state where the grip portion 2 is in contact with the support portion 1. In this state, the yarn joining operation is performed. The yarn joining operation is performed after a predetermined time has elapsed since the infrared sensors 31, 32, 33, and 34 detected yarn breakage. When the yarn break is detected, the grip portion 2 first moves downward toward the support portion 1. At the same time, the hanger 4 is displaced so as to approach the support portion 1 in order to maintain the bending of the strand 15a. The operations of the grip portion 2 and the hanger 4 are executed at predetermined timings. For example, each operation of the grip portion 2 and the hanger 4 is mechanically adjusted using a cam mechanism or the like. It is also possible to link the operations of both mechanically or electrically. When the grip portion 2 comes into contact with the support portion 1, a work space is formed between them, and the yarn splicing work is performed inside the work space. In the yarn splicing operation, as soon as gas is injected from the gas supply source 50 into the injection unit 3 provided in the support unit 1, a gas flow is injected into the working space, and the strand 15 a held by the holding unit 2 is applied. Gas is blown. As a result, the strand 15a moves in a complicated manner inside the work space and gets entangled with the reduced diameter portion 70 of the yarn 10. Thereafter, the strands 15 a are continuously drawn from the preliminary cake 15 as the yarn 10 travels.

  FIG. 4D shows a state where the yarn joining operation is completed. The grip part 2 and the hanger 4 retreat to their original positions. The spare strand 15a used for piecing is thereafter used as a normal strand as it is, and is combined with the yarn 10 at the second merging portion X2 to become a main line. The yarn 10 for which the yarn splicing operation has been completed is wound up by a winding device 60 (not shown) and becomes glass roving. After the series of steps shown in FIGS. 4A to 4D, new spare strands are set on the hanger 4 and the grip portion 2 in preparation for the next yarn joining operation.

<Other configurations in the yarn splicing device>
In the yarn splicing device 100 of the present invention, various devices are devised in order to reliably perform the yarn splicing operation particularly for glass fibers. Hereinafter, such a device will be described.

  FIG. 5 is a schematic cross-sectional view showing the structure of the grip portion 2 and the support portion 1 that are in contact with each other during the yarn splicing operation. In a part of the working space S inside the support portion 1, a bending tube 81 is provided as a gas flow disturbance means. The bending tube 81 functions in cooperation with the injection unit 3. The injection unit 3 includes an injection pipe 83 and an injection port 84 formed at one end of the injection pipe 83. During the yarn splicing operation, the gas supplied from the gas supply source 50 is injected from the injection port 84, passes through the inside of the bending tube 81, and is discharged from the bending tube outlet 82 toward the strand 15a. When the curved tube outlet 82 is disposed in a state close to the strand 15a, the gas flow injected from the curved tube outlet 82 directly acts on the strand 15a (that is, hits directly). For this reason, the strand 15a moves violently inside the work space S by detaching from the gripping member 2a temporarily fixed by a fastener 90 such as a magnet device. As a result, the yarn 10 and the strand 15a are sufficiently entangled, and the yarn joining operation can be performed efficiently. Further, the yarn joining portion formed in this way has sufficient strength.

  In the yarn splicing device 100 of the present invention, a plurality of hangers 4 may be provided. Although not shown, for example, when two hangers 4 are provided side by side, the strand 15a is bent between the two hangers 4 for a long time. As a result, the strand 15a is prevented from being cut when the yarn joining operation is executed, and the yarn joining operation can be performed more reliably.

  The yarn splicing device of the present invention has a defect in glass fiber in a manufacturing process for processing glass fiber used as a raw material for industrial products such as printed wiring boards and glass fiber reinforced plastics (FRP, FRTP) into a glass roving form. Available when it occurs. It can also be used for yarn joining operations in fibers other than glass fibers (for example, synthetic fibers, natural fibers, and metal fibers).

DESCRIPTION OF SYMBOLS 1 Support part 2 Gripping part 3 Injection part 4 Hanger (adjustment means)
10 Yarn 15 Preliminary cake 15a Spare strand 81 Curved tube (disturbing means)
90 Fastener 100 Yarn splicer

Claims (7)

A support part for supporting the running of the yarns to be joined,
A gripping part configured to be movable relative to the support part and gripping the joining strand drawn from the preliminary cake;
An injection unit for injecting a gas flow to the strand;
With
A working space is formed by the gripping portion coming into contact with the support portion, and the yarn joining device performs piecing by tangling the strand to the yarn by the gas flow from the injection portion in the working space. ,
A yarn joining device provided with an adjusting means for adjusting the state of the strand before the yarn joining operation.   The yarn splicing device according to claim 1, wherein the adjusting means is a loosening means for loosening the strand.   The yarn joining device according to claim 1 or 2, wherein the adjusting means is an alignment means for aligning the position of the strand with the grip portion.   The gripping portion is configured to maintain a gripping force of a predetermined level or more during normal time when a yarn joining operation is not necessary when gripping the strand, and to weaken the gripping force during an operation requiring the yarn joining operation. The yarn joining device according to any one of 1 to 3. 5. The yarn splicing device according to claim 1, wherein the grip portion grips the strand with a grip force of 0.1 to 1.1 g weight / mm ² .   The yarn splicing device according to any one of claims 1 to 5, wherein a disturbance means for disturbing the gas flow is provided inside the work space.   The yarn splicing device according to any one of claims 1 to 6, wherein a gas flow from the injection unit directly acts on the strand.

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