JPS60228362A - Yarn winder - Google Patents

Abstract

PURPOSE:To provide a yarn winder which can generate no heat at a bearing portion, obtain the uniform surface temperature of a touch roller, keep the surface temperature low by the cooling effect of air jet and attain good quality of yarn with little difference in dyeing by rotatably supporting the touch roller by means of air bearing. CONSTITUTION:In an air bearing for a touch roller shown in the drawing, pure compressed air 19 (about 5kg/cm<2>G) is introduced into an axial air introduce hole 11 and a radial air introduce hole 12, jetted from air feed holes 16a, 16b. A touch roller 2 is rotatably supported radially and axially out of contact by the generated pressure. Air collected in the interior of the touch roller 2 is passed through an exhaust hole 17 to an axial gap between brackets 9a, 9b and a bush 14, and further discharged to the outside through an exchaust hole 18 of the brackets 9a, 9b. In this arrangement, the temperature of the center of the touch roller and the bearing portion is substantially the normal temperature. The end portions of a yarn spool are colled by a cooling hole of the touch roller.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a yarn winding device having a touch roller whose bearing portion is an air bearing.

(Prior art and its problems) In recent years, with the advancement of synthetic fiber manufacturing technology, the winding speed of yarn winding devices has become very high, ranging from about 6,000 m/min to 81,000 m/min. There is a long-awaited demand for a high-speed yarn winding device that can be put to practical use.

However, as the speed of the yarn winding device increases, problems arise. Mechanically, the bearing part of the touch port, which rotates in contact with the surface layer of the winding body rotating at a circumferential speed, maintains high-speed rotation during operation and receives vibration loads. Strict lubrication and life conditions. The quality of the wound product is affected by thermal damage caused by the touch roller that rotates in contact with the winding yarn. Causes differences in staining and physical properties in the body. These problems have made the establishment of related yarn winding devices difficult.

For such high-speed touch rollers, the lubrication of the bearings is
Spray lubrication has been adopted in place of grease lubrication, and the bearing holding means has also been devised by interposing an elastic body.

However, even with normal spray lubrication, there are drawbacks such as heat generation during continuous high-speed operation, difficulty in maintaining a good lubrication state, and seizure. Furthermore, no concrete measures have been proposed to date to deal with thermal damage caused by touch low 2, which was not considered to be much of a problem at low speeds.

The purpose of the present invention is to overcome the problems that did not occur in conventional low-speed yarn winding devices, and to provide mechanically constant gear even in high-speed rotation, and to prevent damage to the yarn winding body. An object of the present invention is to provide a yarn winding device having fewer touch rolls.

(Structure of the present invention) In order to achieve this object, the yarn winding device of the present invention has the following features:
This device winds a yarn onto a hobbin while bringing a touch roller into contact with the surface of the winding body, and is characterized in that the touch roller is rotatably supported by an air bearing.

Furthermore, at the position where the outer periphery of the winding body contacts the touch roller,
By using an air bearing in which the touch roller is provided with an exhaust hole passing through it in the radial direction, thermal damage to the thread body can be reduced.

(Example) Next, the present invention will be explained in detail using the drawings.

In FIG. 3, the yarn winding device 1 is made up of a tonneau purse device 1, a touch roller 2, and a bobbin holder 3, and the yarn 4 is moved horizontally by a trough slide 5 which is horizontally reciprocated by a trough ζ-seat device 1. The thread is screwed onto the bobbin 6 held by the bobbin holder 5 via the touch roller 2, and wound into a cheese-like spool 7.

Figure 1 shows the touch roller 2 of the yarn winding device as shown in Figure 3.
FIG. 3 is a diagram showing details of the configuration of a bearing portion thereof. 1st
In the figure, the touch roller 2 is supported by hydrostatic air bearings at both ends thereof.

Brackets 9a and 9b for supporting the fixed shaft 8 are fixedly attached to the touch roller frame 10. The fixed shaft 8 has an axial air guide hole 11 and a radial air guide hole 12, and supports a bush 14 in the radial and axial directions via a plurality of O-rings 13.

The bushing 14 has a flange portion 15 with a larger outer diameter at one end.
and a plurality of rows of air supply holes 16 on the mantissa side opened radially.
a and 16b are provided on the cylindrical surface of the touch roller 20. Further, in the axial direction, a plurality of exhaust holes 17 are arranged in the air supply hole 16a.
, 16b so as not to intersect with each other.

A plurality of exhaust holes 18 are provided in the bracket 8.8' in the axial direction, facing the exhaust holes 14 and at approximately the same radial position.

In one air bearing, clean compressed air (approximately 5 kg/
cm2G l 19 is introduced into the axial air guide hole 11 and the radial air guide hole 12, and is ejected from the air supply holes 16a and 16b, and the pressure produced by the air makes the touch roller 2 contactless in the radial and axial directions. It is rotatably supported on the shaft. - Pressure that accumulates inside the cow touch roller 2 follows the exhaust hole 17 and reaches the bracket 9a.

The air is exhausted through the axial gap between the brackets 9b and the bushing 14, and is further exhausted to the outside through the exhaust holes 18 of the brackets 9a and 9b.

FIG. 2 shows another embodiment, and the structure different from that in FIG. Cooling holes 2o are provided in a radial direction and are arranged at approximately equal intervals on the cylinder. The effect is that the pressure accumulated inside the touch roller 2 is discharged from the cooling hole 20 and is blown onto the thread body 7 whose temperature has risen due to frictional heat. Since a temperature difference occurs between the center portion and the end portions of the outer periphery of the thread body 7, it is preferable that the cooling holes 20 are arranged so as to eliminate the temperature difference.

(Effects) Next, the present invention will be explained in detail using the drawings. In Figure 4, in the conventional ball bearing platform, the temperature difference between the center of the touch roller and the bearing increases as the winding speed increases, and the temperature difference near the bearing exceeds approximately 60°C. Occasionally, burn-in occurred on the chopsticks, but in the present invention,
There was almost no temperature difference, and the temperature level was close to the current temperature.

In Figure 5, generally speaking, as the speed increases, the frictional heat between the touch roller surface and the outer periphery of the spool increases, and the temperature difference between the center and end portions of the periphery of the spool increases, resulting in poor yarn quality. However, by the present invention, in particular, by cooling the ends of the winding body using cooling holes provided in the touch roller, it is possible to reduce the difference in coloring.

As described above, the present invention has the following effects.

(1) Since no heat is generated in the bearing section, the surface temperature of the touch roller is uniform, and the surface temperature can be maintained at a low level due to the cooling effect of the pressurized air jet. The result of that spear is the information department!
! 1 (In addition to thermal damage to the thread body, frictional heat in a part of the thread body is also cooled, and light weight 1 with little difference in dyeing occurs.
r' and t are obtained.

Furthermore, as shown in Figure 2, cooling holes 20 are provided to allow pressurized air to flow through 11 to forcibly cool down the heat generated at the end of the spool. Thermal damage to the parts can be alleviated.

(2) Mechanically stable, with no risk of seizure even during long-term continuous operation at high speeds.

(3) There is no restriction due to the 4"Fj slippage or life of the bearing, and there is great flexibility in the configuration of the entire winding machine. In this way, by using the yarn winding device of the present invention, approximately 6. 0OOu
Industrially practical winding has been made possible even at high speeds of +/min or higher.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway view showing the main part of one embodiment of the present invention, Fig. 2 is a partially sectional view showing the main part of another embodiment, and Fig. 3 is the whole of one embodiment^4 FIG. 4 is a temperature comparison diagram of the touch roller central portion and receiving portions at both ends of the conventional ball bearing system using spray lubrication and the present invention; FIG. 5 is a temperature comparison diagram of the touch roller during winding with the present invention. FIG. 3 is a temperature comparison diagram between the end portion and the center portion of the winding body. 1...Tranose device, 2...Touch roller, 3
...Bobbin holder, 4... Yarn, 5... Traverse guide, 6... Zepin, 7... Thread body, 8...
・Stick shaft, 9a. 9b... Bracket, 10... Touch roller frame, 11... Axial air guide hole, 12... Radial air guide hole, 13... 0 ring, 14... Bush, 15...
...Brim portion, 16a, 16b...Air supply hole, 17.
...Exhaust hole, 18...Exhaust hole, 19...Compressed air, 2
o...cooling hole. Patent applicant Asahi Kasei Industries Co., Ltd. Wi1 map old wt3 map

Claims (1)

[Claims] A yarn winding device for winding yarn around a spindle without bringing a touch roller into contact with the surface of the yarn body, the yarn winding device being characterized in that the touch roller is rotatably supported by an air bearing.