JPS5811809Y2 - Pressure roller in thread drawing device of spinning machine - Google Patents

Description

[Detailed description of the invention] This invention places a drive roller and a pressure roller that comes into pressure contact with the drive roller to form a thread engagement part between the yarn pull-out section of the spinning mechanism and the traversing mechanism of the winding device. This is an improved automatic thread-biting notch provided on one side edge of the pressure roller in order to automatically transfer the thread to the engaging part in the thread-pulling device. It is an object of the present invention to provide the above-mentioned notch shape which significantly improves abrasion resistance and which does not reduce the yarn biting performance at all even after re-polishing and repairing wear caused by long-term use.

A drive roller and a pressure roller that is in pressure contact with the drive roller are disposed between the yarn drawing-out section of the spinning mechanism and the traversing mechanism of the winding device,
A thread pulling device in which a pressure roller is provided with a notch for automatic thread biting to facilitate threading work after thread splicing is known from Japanese Patent Publication No. 10486/1986, and is shown in Figures 1 and 1. The configuration is as shown in Figure 2.

That is, the spinning unit includes a spinning chamber (not shown), has a yarn withdrawal point 1 for withdrawing the yarn P from the chamber, and has a yarn withdrawal point 1 for withdrawing the yarn P from the chamber.
is pulled out from the rotating spinning chamber by a pair of pull-out rollers, and wound up as cheese 3 by a traverse roller 2 that serves as a yarn winding and traverse mechanism.

Note that the above-mentioned pull-out roller is formed by a drive roller 4 and a pressure roller 5.

Further, numerals 6 and 7 are a lower yarn guide and an upper yarn guide that guide the yarn through the engagement portion 8 of the driving roller 4 and the pressure roller 5.

Furthermore, a virtual tangent plane 1 extending from the yarn withdrawal point 1 of the spinning unit to the yarn contact point 12 on the traverse roller 2
The pressure roller 5 is arranged such that the pressure roller 5 passes through the pressure roller 5, and the pressure roller 5 is provided with a notch 10 on an annular side edge 9 thereof.

If the thread P breaks, the supply of fibers into the rotating spinning chamber is stopped via a thread breakage sensing element and the trailing end of the thread is wound onto the cheese 3 by the traversing roller 2.

During the repair of a thread breakage, the operator detaches the cheese 3 from the traversing roller 2, returns a certain length of thread P to the cheese 3, and passes the free end of this thread P through the thread withdrawal point 1.

Due to the suction effect of the spinning chamber, the yarn is conveyed onto the collecting surface of the spinning chamber where it joins with the fibers in the spinning chamber.

At the same time, the cheese 3 is brought back into contact with the traversing roller 2, so the yarn P starts to be pulled out of the spinning chamber again and is about to be wound onto the cheese 3. In synchronization with the arrival of the yarn, the feeding device for feeding the fibers to the spinning chamber is activated, and continuous spinning of the yarn then takes place.

At this time, the yarn P is moved between the left and right traversing limit lines 14 and 15 on the virtual plane 11, and when the yarn P comes near the turning point 16 of the yarn on the cuff and traverse roller 2, that is, the traverse limit line When the thread P reaches around 14, the notch 10' bites the thread and engages the pull-out roller (-) and automatically transfers it to section 8.

Therefore, after that, the yarn is wound along the path of the yarn pull-out point 1, the lower yarn guide 6, the yarn engaging portion 8, the upper yarn guide 7, and the contact point 12.

Now, in the pressure roller 5 in the above-mentioned thread drawing device, the conventional notch 10' is attached to the side twill line 10 as shown in FIG.
1' and 102' are connected to the side edge 9 in a straight line, so the plane including the twill line 102' (excluding the side surface of the pressure roller)
The curved twill line 103' formed as the intersection line between the curved line and the side edge 9 of the pressure roller receives concentrated contact with the yarn there.

Since the twill line 103' plays a large role in terms of yarn biting performance, the angle between the twill line 102' and the side edge 9 tends to be as small as possible, and the angle formed by the side edge 9 tends to be sharp. As the yarn slides, the twill wire 103' is prone to wear and scratches (FIG. 3Q).

As this progresses further, it becomes completely worn out and no longer has the ability to bite into the thread (Fig. 3 U).

In addition, the tension of the thread may cause it to bite into the abrasion caused on the ridge line 103', causing thread breakage.

The present invention focused on the fact that the above-mentioned drawback lies in the concentration of the contact load of the yarn on the twill wire 103', and created a notch shape that disperses the contact load of the yarn without reducing the thread biting performance. It is something to be sponsored.

First of all, since the biting force of the thread increases the performance, in this invention, the twill line 1
The smaller the angle δ of the twill line 102 with respect to the tangent line (H-H) at the point where 02 intersects with the side edge 9, the higher the biting performance is. The intersection point N is located at the rear of the line (o-o') connecting the tip of the twill line 102 and the center 0 of the pressure roller 5 with respect to the rotational direction of the pressure roller 5.

In this case, the twill line 102 is not a straight line as shown in FIG. 4, but may be formed in a curved line that increases the width of the twill line 101, as shown in FIG.

It is preferable that the twill line 102 is a curved line because the angle a that the tangent line near its tip makes with the tangent line H-H becomes smaller.

Next, in order to avoid concentration of load on the circumferential twill line 103 with which the yarn P strongly contacts, the twill line 102 is provided with a straight twill line 102A that intersects with the side edge 9.

Therefore, the thread biting part of the notch 10 has the above-mentioned twill wire 1.
02A is also provided with a flat surface extending in the longitudinal direction of the pressure roller 5, which is connected to the twill lines 102A, 103, 104,
The result is quadrilaterals a, b, and C9d surrounded by 105.

With the above configuration, the small angle a ensures that the thread is bitten, and the thread P contacts the twill wire 102A with a flat surface, resulting in line contact, and as shown in FIG. Contact load Tv due to tension is twill wire 102A
are distributed over the length of twill lines 103 and 1
05 wear is also reduced.

In addition, the angle β of the twill line 102A with respect to the extension line of the line connected from the intersection of the twill lines 102 and 102A to the center O of the pressure roller.
is determined by the respective diameters of the pressure roller 5 drive roller 4 traverse roller 2 and their relative positions, and the range is 90°>β≧0°.

Then, the twill line 102A is set so that the running direction of the yarn is parallel to the twill line 102A when the contact load to the flat surface based on the twill line 102AJ is maximum due to the tension of the yarn bitten by the notch 10 of the force roller 5. It is desirable to define an angle β.

Although the notch shape of the present invention can significantly delay the wear of the yarn biting part, the occurrence of wear is still inevitable due to the strong tension when spinning thick yarn.

However, according to the thread biting part formed by the flat surface quadrilaterals aSb and C9d of the present invention, the biting performance as good as new can be maintained again by re-polishing and repairing as shown by the imaginary line 9' in Fig. 4. It is a characteristic.

When biting the yarn P, the twill line 105 first engages with the yarn P, but since the angle δ between the twill line 102 and the tangent line (HH) is small, the yarn is surely bitten.

At this time, the thread tension is still small because the thread route is changed, that is, at the beginning of the thread transfer, but as the thread transfer progresses, the tension becomes stronger, and at the end, when the thread tension is very strong, the thread is bent at a small angle. Aya line 1
03 comes into contact with the twill wire 10, so wear occurs on the twill wire 10.
It is likely to be 3.

Re-polishing repair is easiest by cutting the outer diameter of the pressurized row 25, but this invention also allows you to completely remove the ridge line 10.
It has the effect of repairing 3.

As mentioned above, the present invention maintains the thread biting performance.
It was possible to significantly extend the wear period of the thread biting part, the structure is simple, and repair after wear is also easy.

[Brief explanation of drawings]

Figures 1 and 2 show a yarn drawing device of a spinning machine in which the pressure roller of the present invention is adopted. Figure 1 is a front view, Figure 2 is a side view, and Figure 3 is a conventional pressure roller worn out. FIG. 4 is a side view of the main parts of the pressure roller according to the present invention, FIG. 5 is a perspective view of the main parts similarly showing another embodiment, and FIG. 6 is a main part showing the state in which it contacts the thread. FIG. 8...Thread engagement part, 9...Side edge, 1
0...Nonte, 101, 102, 102A...
...Side twill line, 103...Surrounding Aya island

Claims (1)

[Scope of utility model registration request] A drive roller 2 and a pressure roller 5 that presses against the drive roller 2 and forms a yarn engagement section 8 are disposed between the yarn drawing-out section of the spinning mechanism and the traversing mechanism of the winding device. A notch 10 for transferring the yarn to the yarn engaging portion 8 is formed on one side edge 9 of the notch 10. Of the side twill lines 101 and 102 forming the notch 10, the twill line 102 is connected to the side edge 9 of the notch 10. By providing the straight twill line 102A that intersects with the edge 9, the pressure roller 5 can easily apply a flat surface to the twill line 102A.
The angle β of the twill line 102A with respect to the extension line of the line extending in the longitudinal direction and connected to the center O of the pressure roller from the intersection of the twill lines 102 and 102A is 90°>β≧0°, and The intersection point N of twill lines 101 and 102 is
The pressure roller is positioned rearward in the rotational direction of the pressure roller 5 from the line connecting the center 0 of the pressure roller 5 from the intersection with 02A.