JPH0610379U - Thread guide for draw false twisting machine - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a yarn guide for a draw false twisting machine in which oil does not adhere to the vicinity of the running groove of the yarn guide and eliminate crimping unevenness of the draw false twisting machine. [Structure] In a yarn guide 20 of a draw false twisting machine that bends the yarn path of a yarn Y emitted from a primary heater that heat-fixes a stretched yarn and guides it to a cooling plate, the yarn guide 20 travels when the yarn Y contacts. Groove 21 and entrance 22 of this running groove 21
And the flat surface portion 24 that expands to.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a yarn guide that bends a yarn path of a yarn emitted from a primary heater and guides it to a cooling plate, and more particularly to a yarn guide that can suppress crimp unevenness of a bulk-processed yarn.

[0002]

[Prior art]

 First, a drawing false twisting machine using this type of yarn guide will be described with reference to FIG. FIG. 5 shows one drawn false twisting unit, in which a multifilament yarn such as polyester or nylon called POY (Partial Oriented Yarn) is drawn and false twisted. The multifilament yarn-wound package P1 is supported by the creel stand 1, and the yarn Y drawn from the yarn supply package P1 is introduced into the primary heater 3 via the upstream feed roller 2 and above the primary heater 3. To the yarn guides 15 and 16. Since the primary heater 3 is tall, the guide 15 bends the yarn path so that it is slightly downward, and the maintenance passage 19 is crossed overhead. The yarn Y after the yarn guide 15 passes through the yarn guide 16, passes through the cooling plate 4, is twisted by the false twisting device 5, passes through the downstream side feed roller 6, the secondary heater 7, and the second downstream side feed roller 8. The take-up winder 9 winds it onto the winding package P2. In other words, the yarn upstream of the false twisting device 5 is in a twisted state, and the twist given by the false twisting device 5 tries to propagate to the upstream feed roller 2 via the yarn guides 15 and 16, and this twist is generated by the heater 3. Heat set. Further, the yarn downstream of the false twisting device 5 is in the untwisted state, and the torque is reduced by the secondary heater 7 to leave only the bulkiness. However, this secondary heater 7 is used depending on the intended processed yarn characteristics. It may or may not be used.

The above-mentioned yarn guides 15 and 16 are provided in the middle of the propagation of twist and are for bending the yarn path. Therefore, the yarn guides 15 and 16 are required to have a shape in which the twist is easily transmitted and the yarn does not roll down in the twist direction. The mounting portions and shapes of such thread guides 15 and 16 will be described with reference to FIGS. 3, 4 and 6. The yarn guides 15 and 16 are fixed to the slide member 13 and are formed of ceramic in a substantially drum shape, and the yarn Y travels in the small-diameter traveling grooves 15a and 16a in the center thereof. The slide member 13 is attached to the tip of the rod 12, and when threading, the slide member 13 is lowered to thread the thread guides 15 and 16, and when the rod 12 is pushed upward, the guide roller 31 and the guide plate 32 are removed. The slide member 13 is pushed up along the guide groove 14 and advanced in the direction of the arrow. In this way, the yarn Y is pressed against the yarn traveling portion 17 of the primary heater 3.

[0004]

[Problems to be solved by the device]

 By the way, the reason why the yarn guides 15 and 16 are made substantially drum-shaped as shown in FIG. 4 is as follows. In order to propagate the twist, it is necessary that the surface roughness of the small-diameter running grooves 15a, 16a be as small as possible and easy to slip. This is because a substantially drum shape is most suitable for polishing the small diameter running grooves 15a and 16a. Using a draw false twisting machine equipped with the above-mentioned yarn guides, draw and false twist a specific type of POY (with a large amount of oil adhered) into a woven fabric, and uneven woven fabrics called thin steps are periodically formed on the woven fabric surface. There was a problem that occurred. The occurrence of unevenness in the woven fabric is caused by uneven dyeing, and the uneven dyeing is caused by uneven crimping of the drawn false-twisted yarn. When the cause of this crimping unevenness was pursued, as shown in FIG. 6, the oil 18 that was mainly oozing out from the yarn Y was accumulated under the small-diameter running groove 15a of the yarn guide 15 and was accumulated. It was found that if the oil exceeds the amount, it will be caught in the twist of the yarn Y and scattered, and the twist propagation will be disturbed, resulting in tight spot-like crimp unevenness.

The present invention was born in the pursuit of the cause of such crimping unevenness that the conventional technology has, and the purpose thereof is to collect a lot of oil near the running groove of the yarn guide. An object of the present invention is to provide a yarn guide for a draw false twisting machine which is a non-adhering thread guide and which can eliminate crimp unevenness of the draw false twisting machine.

[0006]

Means for Solving the Problems To achieve the above object, a yarn guide of a draw false twisting machine of the present invention bends a yarn path of a yarn emitted from a primary heater that heat-fixes a stretched yarn and cools it. In a yarn guide of a draw false twisting machine for guiding to a plate, the yarn guide has a traveling groove with which the yarn comes into contact, and a flat surface portion that develops at the entrance of the traveling groove.

[0007]

[Action]

 The yarn path is bent while ensuring the propagation of the twist in the running groove, and the oil that tries to collect at the entrance of the running groove is made to flow out through the flat surface portion developed at the entrance of the running groove.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 (a) is a perspective view of the yarn guide 20, FIG. 1 (b) is a cross-sectional view taken along the plane of the yarn guide of FIG. 1 (a), and FIG. 1 (c) is a view taken along arrow A of FIG. 1 (a). Is.

The thread guide 20 has a thread inlet 22 and a thread inlet 22 in the central small-diameter running groove 15a of the thread guide 15 formed in a substantially drum shape as described in the prior art, except for the running groove 21. The area around the exit 23 is cut out. Therefore, the running groove 21 with which the yarn comes into contact is a substantially arcuate shape, and a small radius R is attached near the inlet 22 and the outlet 23 in consideration of the runout of the yarn. In particular, the inlet 22 of the running groove 21 is spread on a plane to form a plane portion 24. The flat portion 24 extends obliquely downward so that the oil accumulated in the inlet 22 travels through the flat portion 24 by its own weight. In addition, the left end 24a of the flat portion 24 is long as shown in FIG. 1C so that the lowermost end 25 of the flat portion 24 does not come directly above the yarn path, and the lowermost end 25 is biased to the left edge 24a. .

The operation of the yarn guide 20 will be described. The yarn Y is twisted by the twisting device 5 and heat-fixed by the primary heater 3 in a stretched state. The yarn Y emitted from the primary heater 3 does not roll out by the traveling groove 21 of the yarn guide 20, and the smooth surface of the traveling groove 27 causes the twist of the yarn Y to smoothly propagate and the yarn path is bent. , To the cooling plate 4. At this time, the oil 18 oozing out from the yarn Y in the running groove 21 tries to collect at the inlet 22 of the running groove 21, but flows down from the inlet 22 along the flat surface portion 24 which is developed on the plane. Therefore, oil does not collect at the inlet 22 of the running groove 21, and the running yarn Y does not entrap a large amount of oil and the twisting is not unstable. Further, the oil 18 transmitted through the flat surface portion 24 accumulates in the lowermost end portion 25 and drops at the end, but the lowermost end portion 25 is biased to the left side 24a side and is not directly above the yarn path, so the dropped oil 18 Does not fall on the traveling yarn Y. The flat surface portion 24 does not have to be the entire surface, and may be a part from the vicinity of the inlet 22 to the lowermost end portion 25.

Next, another embodiment of the yarn guide of the draw false twisting machine of the present invention will be described with reference to FIG. 2A is a perspective view of the thread guide 26, FIG. 2B is a cross-sectional view of the thread guide plane of FIG. 2A, and FIG. 2C is a view of arrow A in FIG. Is.

In the yarn guide 26, a traveling groove 27 with which the yarn comes in contact with the center of a block-shaped member is formed in a substantially arc shape as shown in FIG. 2B, and an inlet 29 of the traveling groove 27 is developed on a flat surface portion 28. It is a thing. The yarn Y does not roll out in the traveling groove 27 due to the propagation of the twist, and the smooth surface of the traveling groove 27 causes the twist of the yarn Y to smoothly propagate and the yarn path to be bent, so that the oil 18 that tries to collect near the inlet 29 Are transmitted along the flat surface portion 28. In addition, the left end 28a of the flat portion 28 is long as shown in FIG. 2C so that the lower end portion 30 of the flat portion 28 does not come directly above the yarn path, and the lower end portion 30 is biased to the left side 28a. .

The thread guide 26 also operates similarly to the thread guide 20 of FIG. However, only the running groove 27 of the block-shaped part needs to be polished, and the shape is simpler than that of the thread guide 20 of FIG. 1. Therefore, the polishing process is easy and inexpensive to manufacture. You can

The yarn guide of the present invention is most effectively used for the yarn guide 15 located at the first outlet of the primary heater 3 in FIG. However, in addition to the second thread guide 16, the thread guide of the present invention can be applied to a thread guide in which oil easily collects.

[0015]

[Effect of device]

 The yarn guide of the drafting false twisting machine of the present invention smoothly spreads the twist of the yarn at the contact portion of the running groove to bend the yarn path so that the running groove spreads on the plane near the entrance of the contact portion. Since the oil that tries to collect near the entrance of the running groove is carried along the flat surface, the oil is entrained in the running yarn, causing tight spot-like crimping unevenness in the drawn false-twisted yarn. There is no such thing. Therefore, it is possible to supply the drawn false-twisted yarn of stable quality without causing the unevenness of the woven fabric such as the thin stage.

[Brief description of drawings]

FIG. 1 is a view showing a thread guide of the present invention.

FIG. 2 is a view showing another yarn guide of the present invention.

FIG. 3 is a side view of a mounting portion of the thread guide.

FIG. 4 is a front view of a mounting portion of the thread guide.

FIG. 5 is a device layout view of a draw false twisting machine.

FIG. 6 is a view showing a conventional thread guide.

[Explanation of symbols]

 3 Primary Heater 4 Cooling Plate 20 Thread Guide 21 Traveling Groove 24 Plane Y Thread

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Osamu Hirao 136, Takeda Mukoyo-cho, Fushimi-ku, Kyoto-shi, Kyoto Murata Machinery Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A yarn guide of a draw false twisting machine which bends a yarn path of a yarn emitted from a primary heater for heat-fixing a stretched yarn and guides the yarn to a cooling plate, the yarn guide including a running groove with which the yarn contacts, A yarn guide for a draw false twisting machine, comprising: a flat surface portion that develops at the entrance of the running groove.