JPH0433711B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for joining the terminal end and the starting end of two multifilament yarns, particularly fine denier and low filament count yarns such as nylon filaments. Regarding equipment.

(Prior Art) As a conventional yarn joining device, there is, for example, one described in Japanese Patent Application No. 149768/1983 filed by the present applicant.

This device includes a pair of clamping means installed at a predetermined distance from each other and capable of clamping the overlapping ends of the two yarns, and a pair of clamping means installed between the clamping means and capable of clamping the overlapping ends of the two yarns. entangling means for interlacing the filaments of each yarn by blowing compressed air to the ends of the yarn;
It is equipped with the following. In this device, first, the terminal ends and starting ends of two multifilament yarns are overlapped each other by a predetermined length, and then the ends of the overlapping yarns are clamped by a pair of clamping means separated from each other. Hold it in place. Next, after stretching the yarn in a range of 0.8 to 1.2 times the predetermined stretching ratio by a pair of clamp means, the yarn is relaxed, and then the overlapping yarn between the clamp means is stretched by an interlacing means. Compressed air is blown to disperse each yarn into filaments and to entangle these filaments. As a result, the ends of the threads are joined together.

(Problems to be Solved by the Invention) However, in such a conventional binding device, the multifilament is held by clamp means and stretched at a predetermined stretching ratio, and then the yarn is relaxed and then compressed air is used to stretch the multifilament. Since the structure was designed to intertwine the yarns, it was effective for intertwining polyester multifilament yarns, but with fine denier and low filament count yarns such as nylon multifilament yarns, even if the yarns were stretched and then relaxed. Since the yarn returned to a length close to that before drawing, even if the yarn was entangled with compressed air in this state, a good intertwined state could not be obtained. As a result, thread breakage occurred at the joint when passing through the tail during continuous DTY processing, resulting in the problem that continuous DTY processing of nylon multifilament yarn was not possible.

(Means for Solving the Problems) The present invention was made for the purpose of solving the above-mentioned problems. The coupling device includes a pair of clamping means installed at a predetermined distance from each other and capable of clamping the overlapping ends of the two yarns, and a pair of clamping means installed between the clamping means and capable of clamping the overlapping ends of the two threads. A yarn binding device comprising: an entangling means for intertwining the filaments of each yarn by blowing compressed air onto the ends of the yarn; and a yarn relaxing means for reducing the distance between the pair of clamping means. , the distance shortened by the relaxation means is 25
A regulation means is provided to limit the diameter to 50 mm or more and 50 mm or more.

(Function) The function of the present invention having such a configuration is as follows.

First, the terminal ends and starting ends of two nylon multifilament yarns are overlapped by a predetermined length. Next, the distance between the pair of clamp means is set to the maximum length by means of a relaxing means for adjusting the distance between the pair of clamp means and a regulating means thereof. Next, the overlapping ends of the threads are clamped by a pair of clamp means separated from each other. Next, the spacing is reduced by the relaxing means and the regulating means, and the yarn is relaxed to a spacing of 25 mm or more and 50 mm or less. Next, compressed air is blown onto the yarn by an interlacing means to defibrate the filaments of each yarn and entangle these filaments with each other. In this way, the ends of the nylon filament yarns, which have a high percentage of yarn breakage, are joined together.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. 1 to 3 are diagrams showing one embodiment of the present invention. Note that this embodiment is an example in which the present invention is applied to a fine denier, low filament count yarn such as nylon filament yarn.

In FIG. 1, numerals 1 and 2 are bobbins around which undrawn or semi-drawn nylon multifilament yarns 3 and 4 are wound, respectively, and the terminal ends 5 and starting ends 6 of these yarns 3 and 4 are overlapped with each other. has been done. A fixed holder 7 extends perpendicularly to the threads 3 and 4, and a movable holder 9 is connected to the fixed holder 7 so as to be movable in parallel via a relaxing means 8 for adjusting a distance L, which will be described later. ing. Clamp means 10 and 11 are attached to the fixed holder 7 and the movable holder 9, respectively, and spaced apart from each other by a predetermined distance in the direction in which the threads 3 and 4 extend. These clamping means 10 and 11 move closer to each other and move away from each other as the movable holder 9 moves.
The fixed holder 7, movable holder 9, and relaxation means 8 described above collectively constitute the approach/separation means 12. As shown in detail in FIG. 2, each of the clamping means 10, 11 has a single-acting cylinder 13 in which a piston 15 having a piston rod 14 is accommodated. 16 is a fluid supply port formed in the cylinder 13, and 17 is a spring that urges the piston 15 to retract the piston rod 14. A head body 18 is fixed to the tip of the piston rod 14, and a box 20 is swingably connected to the head body 18 via a pin 19. A clamp member 21 made of a non-metallic elastic material such as polyurethane rubber is attached to the box 20. On the other hand, a clamp member 23 similar to the clamp member 21 is attached to a step 22 of the movable holder 9 or the fixed holder 7 that faces the clamp member 21 . Such clamp members 21 and 23 increase the coefficient of friction with the threads 3 and 4 when they clamp the threads 3 and 4.
Note that such clamp members 21 and 23 may be omitted and the threads 3 and 4 may be held between metal surfaces, but in this case, the surfaces to be held may be mirror-finished. The aforementioned cylinder 13, piston 15, piston rod 14, head body 18, box 20,
The clamping members 21 and 23 collectively constitute clamping means 10 and 11, respectively. An interlacing means 24 is installed between the clamping means 10, 11, and the interlacing means 24 has an interlacing block 25 as shown in FIG. An interlacing hole 26 into which the end portions 5 and 6 of the overlapping yarns 3 and 4 are inserted is formed in the interlacing block 25, and a jetting hole 27 through which compressed air is ejected is formed in the central wall surface of the interlacing hole 26. One end is open. This spout hole 27 is the interlacing hole 26
The other end is connected to a source of compressed air (not shown). The axial length l of this interlacing hole 26 is preferably in the range of 15 mm or more and 35 mm or less.

Returning to FIG. 1 again, the loosening means 8 is interposed between the ends of each clamping means 10, 11. The adjusting means 8 has a single-acting cylinder 28 in which a piston 30 having a piston rod 29 is accommodated. 31 is a fluid supply port formed in the cylinder 28, and 32 is a spring that urges the piston 30 upward in FIG. In addition, the cylinder 28
is connected to the end of the clamping means 10, and the piston rod 29 is connected to the clamping means 11 via one end of a bracket 33 connected thereto. The other end of this bracket 33 is inserted between a pair of stopper members 34, 35, and the amount of movement of the piston rod 29 is determined by the amount of movement of the stopper members 35, 35.
It is regulated by 6. Therefore, the distance L between the clamping means 10, 11 is adjusted to be 25 mm or more and 50 mm or less when the clamps 10, 11 are compressed by the relaxing means 8. The pair of stopper members 34 and 35 constitute a regulating means 36 as a whole. In addition, both the clamping means 10, 11 are arranged so that the clamping means 10, 11 can smoothly approach and separate from each other.
A pair of rods may be provided between the rods 11.

Next, the operation of this invention will be explained.

First, the terminal end 5 of the yarn 3 and the starting end 6 of the yarn 4 are passed through the interlacing hole 26 from opposite sides, and then overlapped by a predetermined length. Next, fluid is supplied from the fluid source into the cylinder 28 through the port 31, and the piston rod 29 is moved downward in FIG. 1 while compressing the spring 32 to maximize the distance L. Note that positioning at this time is regulated by a stopper member 35. Next, the overlapping threads 3, 4 are placed between the clamping members 21, 23 of the clamping means 10, 11 spaced apart from each other.
Next, fluid is supplied from the fluid source through the port 16 into the cylinder 13 of each clamping means 10, 11, causing the piston rod 14 to protrude while compressing the spring 17. As a result, the overlapping threads 3 and 4 are clamped by the clamp members 21 and 23 of the clamp means 10 and 11, respectively. Also, at this time, the threads 3 and 4 try to slip between the clamp members 21 and 23 and come out, but since the clamp members 21 and 23 are made of polyurethane rubber, the threads 3 and 4 are securely clamped without slipping. be done.

Next, the fluid in the cylinder 28 is removed and the clamping means 11 is moved upward in FIG. 1 by the reaction force of the spring 32, thereby reducing the distance L. At this time, the shrinkage margin is set to, for example, L x (0.05 to 0.15), so that the distance L is 25 mm or more and
The range shall be 50mm or less. In this way, the yarns 3 and 4 are relaxed. Next, compressed air supplied from a compressed air source is ejected from one end opening of the ejection hole 27 into the entangled hole 26, and is blown against the threads 3 and 4 that overlap each other. When the compressed air blows against the yarns 3, 4, each yarn 3, 4 is opened and the filaments become entangled with each other. As a result, the distance between the starting end 5 of the thread 3 and the terminal end 6 of the thread 4 is 15 to 35 mm.
The threads 3 and 4 are intertwined within the range of .
Next, when the port 16 is communicated with the atmosphere, the piston rod 14 of the clamp means 10, 11 is retracted by the spring 17, and the clamping of the threads 3, 4 is released. In this embodiment, the yarn relaxing means 8 reduces the distance between the pair of clamping means 10 and 11, and the regulating means 3 restricts the distance shortened by the relaxing means 8 to 25 mm or more and 50 mm or less.
6 and , yarns 3 and 4 of fine denier and low filament number yarns such as nylon filament yarns are provided.
The ends of the threads 3 and 4 can be reliably relaxed to the optimum state for joining without stretching the ends of the threads 3 and 4, and the ends of the threads 3 and 4 can be easily and easily relaxed. can be reliably combined.

Next, FIG. 4 is a sectional view of a main part showing another embodiment of the present invention.

This embodiment is an example in which two interlacing means 40, 41 are provided between each clamping means 10, 11, respectively. In the figure, 40A and 41A indicate intertwining blocks, and the yarns 3 and 4 are intertwined with compressed air jetted from jet holes 40B and 41B formed in these interlacing blocks 40A and 41A, respectively. In addition, 42 is two confounding blocks 40A, 4
This is a ballooning prevention plate provided between 1A. In this embodiment, the interlacing blocks 40A, 4
Since the yarns 1A are stacked in two stages, the degree of entanglement of the yarns 3 and 4 can be further increased. The other configurations and operations are the same as in the previous embodiment.

(Effects) As explained above, according to the present invention, the ends of fine denier, low filament count yarns such as nylon filament yarns can be joined in an optimal state without stretching the ends of the yarns. It can be loosened reliably, and the ends of the yarn can be tied together very easily.
and can be reliably bonded. Moreover, since the bonded portion of the bonded yarns is thin, the yarns can be connected in high-speed friction POY-DTY processing without being cut at the bonded portion. Also,
This invention is based on polyester and polyamide FDY.
It can also be applied to pin-type false twisting of yarn (drawn yarn).

[Brief explanation of drawings]

1 to 3 are diagrams showing one embodiment of the present invention, FIG. 1 is a schematic front view thereof, and FIG. 2 is a first embodiment of the present invention.
FIG. 3 is a cross-sectional view of the interlacing means, and FIG. 4 is a cross-sectional view of a main part thereof showing another embodiment of the present invention. 3, 4... Yarn, 5, 6... End of thread, 8...
... Relaxing means, 10, 11 ... Clamping means, 24
... Confounding means, 36... Regulating means, L... Interval.

Claims (1)

[Scope of Claims] 1. A yarn joining device for joining a terminal end and a starting end of two multifilament yarns, the overlapping ends of the two yarns being arranged at a predetermined distance from each other. a pair of clamping means capable of holding each yarn; and an entangling means installed between the clamping means and intertwining the filaments of each yarn by blowing compressed air to the ends of the overlapping yarns between the clamping means. A yarn binding device comprising: a yarn relaxing means for reducing the distance between the pair of clamping means; a regulating means for restricting the distance shortened by the relaxing means to 25 mm or more and 50 mm or less; A yarn binding device characterized by being provided with. 2. The yarn binding device according to claim 1, characterized in that a plurality of entangling means are provided within the interval between the pair of clamping means.