JPS6034629A - Creel having over-feed roller - Google Patents

Abstract

PURPOSE:A creel in which the yarn from the package is fed, as it is made to slide around the over-feed roller, thus enabling the yarn to be fed always under a constant tension, even in bulky texturing. CONSTITUTION:The yarn 1 taken out of the package 3 is sent through yarn guide 4 and around the guide rod 5, then to the over-feed roller 11. The over- feed roller is allowed to rotate at a speed 15-30% slower at the peripheral speed than the yarn feed speed. The yarn is made to run around the roller about 1/8 to 1/2 and led to the movable guide rod 12. The length of the yarn sliding around the over-feed roller 11 is controlled by changing the position in the slit 20 of the rod 12. Then, the yarn is passed, as conventionally, through a tension device 6 composed of a couple of metal plates which are pressed from both sides by springs, then through the guide rods 7, 7', the traverse guide 8, feed rollers 9, 9', and 9'', then to the twister.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that stabilizes the tension of the raw yarn wound on a bobbin at a creel, without unwinding the raw yarn wound on a bobbin and paying it out to a twisting machine via a tension device. More specifically, it relates to a creel equipped with an overfeed roller that rotates at a circumferential speed faster than the speed at which the yarn is taken out.

Conventionally, in order to supply yarn to a twisting machine such as a ring twisting machine, the first
As shown in the figure, the yarn (1) is unwound from the yarn package (3) wound around the bobbin (2), and the yarn guiding guide (
4), the tension device ((
)) to give a constant tension, and then the guide rod (
7), (7), through the traverse guide (8), is fed out at a constant speed by feeding rollers (9)<4)<a that roll into contact with each other, and is supplied to the twisting device 00. In this case, the yarn (1) unwound from the yarn package (3) is unwound from the bobbin (2).
) in the +1M+ direction, so it is always pulled out while sliding against the outer layer of the yarn package (3). At this time, the tension of the thread being pulled out fluctuates due to the entanglement of the sliding thread, and the strength of the thread increases.
The elongation and number of twists fluctuate, which adversely affects the quality of the product.

Particularly in the case of bulky yarn, if the yarn gets tangled during unwinding due to filament breakage or tangles in the yarn package, the pulling out of the yarn is stopped by the wire that applies the necessary tension to unravel the tangled yarn, and the yarn is unraveled. The yarn between the package and the payout roller is stretched due to abnormal tension. This is the maximum twist variation, and if the hook is too thick, yarn breakage will occur.

Therefore, in view of the above-mentioned drawbacks of the conventional creel, the present invention aims to keep the tension of the yarn unwound from the raw yarn package and supplied to the yarn twisting device via the tension device as constant as possible, eliminate twist fluctuation, and prevent yarn breakage. The purpose is to provide a creel that can be prevented.

As a result of repeated research without achieving the above objectives, the present inventors installed an overfeed roller in the middle of the yarn being unwound from the raw yarn package and pulled out through the yarn guide guide to the tension device. , the yarn is passed around the overfeed roller while sliding, while the overfeed roller is in the same direction as the yarn running direction, and the circumferential speed of the sliding part of the yarn is higher than the speed of the yarn. The present inventors have discovered that by rotating the thread at a speed that increases the tension, when the thread becomes entangled and the tension increases, the thread can be forcibly pulled out and untangled, and the present invention has been completed.

That is, the gist of the present invention is to pass the yarn unwound from the raw yarn package through the yarn guiding guide, apply tension with a tension device, and supply the yarn to the twisting device in the creel of the yarn twisting machine. An overfeed roller is provided in the yarn outlet path between the overfeed and the tension device, and the yarn is wound around the overfeed and runs while sliding. The creel is equipped with an overfeed roller that is rotated in the same direction as the yarn running speed and at a circumferential speed that is 15 to 30% higher than the running speed of the yarn.

Next, the content of the present invention will be explained in more detail with reference to the drawings. FIG. 2 is an explanatory diagram showing one embodiment of the present invention. (3
) is the raw yarn package and the yarn (1
) passes through the hole in the thread guiding guide (4) and the guide rod (5)
After being wound while sliding around the overfeed roller (11) for about 1/8 to 1/2 rotation, the tension device ( 6). 2 pressed together by a spring
The thread (1), which is given tension by passing between the tension device (6) made of two metal plates, is attached to the guide rod (7).
and (7), and the feeding rollers (9) that come into contact with each other.
(9) The yarn is fed out at a constant speed by (9), and the twisting device α0
). (8) is a traverse guide which moves reciprocatingly in a direction perpendicular to the running direction of the yarn to displace the yarn path and prevent only a certain position of the feeding roller from being worn out.

The overfeed roller (11) is, for example, a cylindrical roller with flanges at both ends as shown in FIG. 3, and is made of metal or ceramic with a surface treatment such as hard chrome plating or hard alumite treatment. The yarn (1) is rotated in the same direction as the sliding yarn wound around it and so that the circumferential speed of the sliding portion of the yarn (1) is 15 to 30% faster than the traveling speed of the yarn. If the driving force for this rotation is transmitted from the drive source of the unwinding roller via gears or belts, when the rotational speed of the yarn twisting device and the unwinding roller is changed, it will always follow this and adjust to the unwinding speed of the yarn. The rotational speed of the overfeed roller can be changed proportionally, and the yarn speed and the circumferential speed of the overfeed roller can be kept at a constant ratio.

The variable guide rod α can be slid into a long hole (E) and fixed at any position. By adjusting its position, the thread (1) can be moved to the overfeed roller. You can adjust the distance it slides around.

Next, the operation of the overfeed roller of the present invention will be explained. Yarn (1) unwound from yarn package (3)
) enters the tensioning device (6), the tension acting on the yarn (1) is applied to the yarn (
1) is only the frictional force of sliding on the surface of the yarn package (3) and the frictional force of passing through the yarn guiding guide (4), guide rod (5), and Q21, so as long as the yarn is not entangled. Only a very small amount of tension (10 g or less) is applied. Therefore, this yarn (1) rotates around the overfeed roller (1) for 1/8 to 1/2 turn, 1/1 of the yarn running speed.
The frictional force during sliding at a relative speed of 5 to 30 degrees is very small. However, once the yarn (1) gets tangled during unwinding and the yarn cannot be smoothly fed out from the yarn package (3),
Since the pay-out roller (9) always rotates at a constant speed and pulls the yarn at a constant speed, the tension of the yarn increases suddenly, and the yarn passing through the overfeed roller (11) reaches the surface of the overfeed roller (1℃). It is strongly pressed, and a large frictional force acts in the direction of letting out the yarn (1), forcing the yarn to be pulled out.The forced pulling force of this overfeed roller 01) causes the yarn to be pulled. 1 is quickly lifted. When the string is no longer pulled,
Since the thread tension is relaxed, the frictional force of the overfeed roller becomes very small again. The above action of the overfeed roller makes it possible to stabilize the tension of the yarn entering the payout roller. In particular, the faster the yarn feeding speed is, the more remarkable the effect of the overfeed roller is.

The overfeed roller (l) may have a cylindrical shape with a flange as shown in FIG. 3, or may have an arcuate or V-shaped cross section so that the center of the cylinder becomes narrower.

FIG. 4 shows an example in which a creel equipped with an overfeed roller according to the present invention is used in a hollow spindle type twisting device. Yarn (1) unwound from yarn package (3)
) is a yarn guiding guide (4), an overfeed roller (l
]), the tension device ft (G), the guide rod is pulled out to the outer periphery of the rotating spindle disk 04) and heated while ballooning 05), while the tension device ft (G) is pulled out from inside the stationary spindle pot Q (il) via the tensioner θ force. At the same time, the thread QB) is heated and wound by the winding drum. Thread introduced from outside the spindle (1
) is given tension by the tension device (6), and the ballooning Q! In order to stabilize the spindle 9, the winding of the thread on the spindle disk 04) is adjusted to a small degree, but it is most desirable to wind the thread on the disk 3/4 to 1 turn.

) If the yarn gets caught on the raw yarn package (3), the yarn will not wrap around the spindle disk (04), and yarn breakage will occur immediately. In particular, with this hollow spindle type yarn twisting device, the yarn is not paid out at a constant speed by a payout roller before entering the yarn twisting device, but instead is wound at a constant speed by a winding drum θ9) after passing through the yarn twisting device. Therefore, tension fluctuations caused by the yarn being caught in the creel immediately affect the twisting state of the yarn in the twisting machine, so it is necessary to minimize the tension fluctuations in the yarn as much as possible. The creel equipped with the overfeed roller of the present invention is extremely effective in quickly releasing the yarn tension, stabilizing the yarn tension, and preventing yarn breakage.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a creel of a conventional yarn twisting machine, Fig. 2 is an explanatory diagram of a creel with an overfeed roller of the present invention, Fig. 3 is a front view of the overfeed roller of the present invention, and Fig. 4 is an explanatory diagram of a creel of a conventional yarn twisting machine. FIG. 2 is a diagram showing another embodiment of a creel equipped with an overfeed roller of the present invention. Explanation of symbols (1)...Thread, (2)...Bobbin, (3)...
Yarn package, (4)... Yarn guiding guide, (5)...
・Guide rod, (6)...Tension device, (9)
(6) (9')... Feeding roller, (ICI...
Twisting device, 0])... Overfeed roller, 0
Pi...Variable guide rod, (l萄...Hollow spindle type PE(]4)...Spindle disk, (]υ...
・Ballooning, 00 ・・Spindle Ball 1゛, (17
) °-° tether, α8)... Thread, θ9)... Winding drum, (1)... Long hole. Patent Applicant: Kaji Iron Works Co., Ltd. Agent: Yoshiyuki Koyama, Patent Attorney No. 1 4 Figure 2, 301 Figure 4

Claims (2)

[Claims] (1) In the creel of the twisting machine, the yarn unwound from the yarn package is passed through the yarn guide guide, tension is applied by the tension device, and the yarn is supplied to the yarn twisting device. An overfeed roller consisting of a roller that is forcibly rotated is provided in the lead-out path, and the yarn is made to run while turning and sliding around the overfeed roller, and the overweed roller is slid on this. A creel equipped with an overfeed roller that rotates in the same direction as the running direction of the yarn and at a circumferential speed that is 15 to 30% higher than the running speed of the yarn. (2) The thread passing through the overfeed roller is guided by a variable guide rod disposed such that its position can be adjusted, and the sliding distance of the thread on the circumferential surface of the overfeed roller is adjusted. Creel with overfeed roller as described.