JPH0245248Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a friction roller in a winding machine for yarn, particularly synthetic fiber yarn.

Prior art and its problems Generally, the spindle (bobbin holder) or friction roller of a yarn winding machine is often supported in a so-called cantilever type, which does not substantially hold the tip side, and is driven to rotate. . When winding a yarn onto a bobbin while traversing the yarn using such a winding machine, for example a friction-driven friction roller type winding machine, the tip of the friction roller that rotates at high speed and the bobbin holder that rotates in contact with it are separated. Due to the holding and supporting mechanism, it tends to swivel more than the rear end, which is the support side, and the product is in good shape, with the tip surface of the package being formed bulging or having protrusions (so-called bulges, ear stand, etc.). tend not to be obtained stably. For this reason, the traversing fulcrum guide of the traverse is placed at a position that is a certain distance from the traverse center position to the front end of the bobbin in order to prevent yarn unevenness and yarn breakage, etc., as described in Japanese Patent Publication No. 50-20618. Fixing is done.
However, when yarn is wound with such a winding machine, the front end of the resulting package has a good shape with little bulge, but the rear end has a bad shape, In particular, at the turning point of the traverse on the rear end side, there was a problem in that the yarn largely flowed toward the inside of the traverse (toward the front end), resulting in a step-like end surface.

As a result of repeated studies on such problems, the inventor of the present invention found the following. That is, in general, the surface of the friction roller is mirror-finished at the portions corresponding to both ends of the yarn layer formed on the bobbin (both ends of the yarn traverse or the folded portion) to prevent slippage at the yarn folded portion, and the intermediate portion is mirror-finished. The top has a rough surface, especially a satin (finished) surface, to improve thread separation and prevent thread entrainment. However, if the traverse fulcrum guide is changed to the front end side of the friction roller as described above, the yarn tension at the yarn turn-back portion at the rear end side increases rapidly, making it easy for yarn slippage to occur. It was found that the conventional method of forming the yarn folded portion at the end into a mirror-like area with a narrow width was not sufficient.

Purpose of the invention The present invention was created in view of the above-mentioned problems, and it is a friction roller for a yarn winding machine that can stably obtain a good yarn package without collapse or irregularities on the end face. The purpose is to provide

The purpose of the present invention can be achieved by the following configuration.

Structure of the invention In other words, the invention provides a friction roller for a yarn winding machine in which mirror surfaces are formed at positions corresponding to both ends of the yarn layer of a yarn package, and the mirror surface at one end extends to the center and the mirror surface at one end is mirror-finished. This friction roller is characterized in that the outer circumferential surface sandwiched between the mirror surfaces on the other end side has a satin finish, and the boundary between the satin finish and the mirror surface at the center is formed in a wavy or pulsed shape.

Here, the center position of the roller refers to the position of the friction roller corresponding to the yarn layer of the yarn package or the center of the traverse length, and is used for multi-spring winding where one friction roller forms multiple packages. In the case of a removal machine, there will be a number of center positions corresponding to the number of package cages.

Embodiments Hereinafter, the present invention will be explained based on the drawings. FIG. 1 is a side view showing an embodiment of the present invention, and FIGS. 2 and 3 are a front view and a side view of a winding machine to which the friction roller shown in FIG. 1 is attached. In the figure,
Reference numeral 1 denotes a main body of a winding machine, and the main body 1 includes a friction roller 3 provided with a cover 2, a traverse box 5 having a traverse guide 4, and two bobbin holders 6 and 7 that rotate by friction in contact with the friction roller 3. A rotatable turret 8 etc. is attached. Reference numeral 9 denotes a plate-shaped yarn removal guide that extends in the traverse direction and is disposed above the traverse box 5. It is rotated toward the cover 2 side around a pin 10 by a fluid pressure cylinder (not shown) to remove the yarn Y.
from the traverse guide 4. A bunch guide 11 is provided at a position facing the yarn removal guide 9 while sandwiching the yarn Y, and has one V-shaped recess 11a in the traverse area.

As shown in FIG. 1, the friction roller 3 according to the present invention has front and rear outer peripheral surfaces corresponding to both ends of the yarn layer formed on the bobbin B, more specifically, the friction roller mainly contacts and substantially Regions 3a and 3b corresponding to the raised portions at both ends of the package yarn layer, which are the portions that perform frictional drive, are at least mirror-finished to ensure reliable rotational transmission without slipping.

The mirror area 3a is usually about 5 to 20% of the traverse length, but is not limited to this.

Incidentally, the mirror surface area 3a or 3b may be provided with a ring-shaped area 3c made of a matte surface in the circumferential direction for use when threading, etc., to prevent the thread from being entangled.

The mirror surface area 3b on the rear side is formed so that the mirror surface extends from the rear position to a position beyond the center position of the traverse length, and furthermore, between this position and the mirror surface area 3a on the front side is an area 3d made of a satin surface. At the boundary between the satin area 3d and the mirror surface area 3b, a wavy or pulsed buffer area 3e is formed between the satin area and the mirror surface. Both ends 3f, which are other parts of the friction roller 3,
3g is considered to be a satin finish, but it may also be a mirror finish. The pear surface is usually 2-12s, preferably 3-5s,
Further, the mirror surface should have a duration of 1 s or less, preferably 0.6 s or less, but is not limited to this range.

Effects In the device having such a configuration, the first to
Bobbin B inserted into bobbin holder 6 as shown in Figure 2
is frictionally driven by a friction roller 3,
The yarn is guided by the traverse guide 4 and traversed back and forth using the traverse fulcrum guide 12 as a fulcrum, and is wound up to form a yarn layer. Here, for example, when the traverse fulcrum guide 12 is located ahead of the traverse center point as shown in Fig. 2, the yarn tension due to the traverse moves to the rear side (toward the machine base 1 side) compared to the front and rear sides. As the height increases, the yarn Y, which conventionally moved to the normal position at the traverse end, slips, or slips before reaching the normal position, or is pulled toward the center.

However, in the case of the present invention, the mirror surface area 3 on the rear side
Since b is extended to the center, the yarn is guided for a predetermined length on the friction roller 3 and reaches the bobbin. 3, and there is no slippage around the turning point at the rear end of the traverse, and as a result, there is no step formation or collapse caused by slipping to the front side of the thread, which is the case with conventional threads, and a well-ordered shape is achieved. Good cheese-like packages can be stably obtained (conventional incidence rate 1)
% decreases to 0.2%). In addition, since the boundary at the center is formed by the mirror surface and the satin surface being intricately wavy or the like, the transition between the mirror surface and the satin surface is extremely smooth and the winding condition is improved.

In addition, as shown in this embodiment, the mirror area 3 on the rear side
It is preferable to extend b to some extent toward the front side of the central position, but the present invention is not limited to this. If the tension is greater on the front side, the positions of the mirror surface and the satin surface can be reversed.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, and FIGS. 2 and 3 are a front view and a side view of a winding machine to which the friction roller shown in FIG. 1 is attached. 3... Friction roller, 3a... Mirror area on the front side, 3b... Mirror area on the rear side, 3d...
Satin area, 3e...boundary part.

Claims (1)

[Scope of utility model registration request] In the friction roller of a yarn winding machine, which has mirror surfaces at positions corresponding to both ends of the yarn layer of the yarn package, the mirror surface on one end extends to the center and is sandwiched between the mirror surfaces on one end and the other end. A friction roller characterized in that the outer circumferential surface of the friction roller has a satin finish, and the boundary between the matte finish and the mirror surface at the center is formed in a wavy or pulsed shape.