JPH0245247Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a device for winding yarn into a cone shape in a textile machine such as an open-end spinning machine or a binding spinning machine. More specifically, the present invention prevents the yarn layer on the larger diameter side from shifting toward the smaller diameter side in a cone winding device.

Prior Art A device for winding a cone by frictionally driving the outer circumferential surface of the cone P, as shown in FIG. 4, a drive drum 5 that frictionally drives the cone P, and a traverse guide 6. The drive drum 5 has a cone drive portion called a drive band 5a, and The cone P is frictionally driven by the drive band 5a,
The yarn Y fed from the pull-out roller 2 is the cone P
It is wound up.

Problems to be solved by the invention By the way, when winding the thread Y around a truncated cone-shaped cone P, in order to wind it with a certain tension,
A force acts on the thread Y that tends to shift it toward the smaller diameter side. or,
Since the yarn Y is continuously wound, a force acts on the entire surface layer of the yarn Y to shift it toward the smaller diameter side. That is, as shown in FIG. 6, the entire yarn layer on the surface of the cone is wound with a tension F1 acting in a direction perpendicular to the axis of the cone P. If we break down this tension F1 into a force F2 that moves in the direction of inclination of the cone P and a force F3 that acts perpendicularly to the cone surface, we can see that F2 acts in a direction that shifts the yarn layer toward the smaller diameter side. Recognize. Normally, the yarn layers do not come apart due to frictional resistance, but if for some reason the yarn layer becomes slack during winding, the yarn layer will shift toward the smaller diameter side. or,
As winding progresses and the cone shape becomes larger in diameter, the cone shape becomes more likely to collapse, further increasing the tendency for the yarn layers to shift.

The problem to be solved by the present invention is to prevent the yarn layer of the cone P from shifting toward the smaller diameter side during winding.

Means for solving the problems In this invention, in order to solve the above conventional problems,
A helical groove was formed on the surface of the cone drive drum in a direction that applied a thrust force toward the yarn layer from the small diameter side to the large diameter side of the cone.

Effect With the above configuration, a thrust force from the small diameter side of the cone to the large diameter side acts on the thread layer on the surface of the cone that contacts the drive band during winding, causing the thread layer to shift from the large diameter side to the small diameter side. can be prevented.

EXAMPLE Hereinafter, an example embodying the present invention will be described with reference to FIGS. 1 to 4.

In FIG. 1, the bobbin holder frame 11 is fixed to the machine base, and the bobbin holder frame 11
A holder arm 12 is rotatably fixed to. A cradle arm 13 is attached to one end of the holder arm 12 so as to be openable and closable, a bobbin holder 14 is supported at the end of the cradle arm 13 and the other end of the holder arm 12, and the bobbin 4 is supported by the bobbin holder 14. .

The cone P is in contact with the upper part of the drive drum 15, and the drive drum 15 is fixed to a drive shaft 16. Further, 6 is a traverse guide for traversing the spun yarn Y.

Now, in the device of this embodiment, the drive drum 1
A helical groove 21 is formed on the surface of the drive band 15a provided in the drive band 15a in the direction of applying a thrust force from the small diameter side to the large diameter side of the cone against the thread layer on the surface of the cone P, and the cross section thereof is It has the shape shown in Figure 3.

Next, the operation of the apparatus configured as described above will be explained. The yarn Y spun by the spinning unit 1 and actively pulled out by the draw-off roller 2 and top roller 3 is guided to a traverse guide 6,
The cone P is wound onto the bobbin 4 while being traversed by the left and right movement of the traverse guide 6. The cone P is frictionally driven by a drive band 15a of a drive drum 15 that rotates integrally with the drive shaft 16, and the yarn Y is wound around the cone P. At this time, since the yarn Y is wound with winding tension applied to the cone P, the entire yarn layer of the cone P tends to shift from the large diameter side to the small diameter side of the cone. Helical groove 21 formed in band 15a
Due to the action of the yarn layer of the cone P and the drive band 15a
A thrust force acts from the small diameter side of the cone P toward the large diameter side at the contact point. This thrust force directly acts only on the contact point between the cone P and the drive band 15a, but when the thrust force is generated at the contact point, the yarn layer on the larger diameter side from the contact point is pushed toward the larger diameter side. Since the yarn layer on the small diameter side is pulled toward the large diameter side, a thrust force is generated in the entire yarn layer as a result. This thrust force cancels out the force that causes the thread layer to shift from the large diameter side of the cone to the small diameter side, prevents the thread layer from shifting, and improves the shape of the cone P.

Furthermore, if the thrust force due to the action of the helical groove 21 is too large, the thread layer of the cone P may shift toward the larger diameter side, contrary to the conventional case, so in this embodiment, the thrust force is set to an appropriate magnitude. It is necessary to adjust the interval between the grooves 21 and the angle α between the grooves 21 and the axis of the drive drum 5.

That is, by decreasing the interval between the grooves 21 and increasing the number of grooves 21, the thrust force increases, and by decreasing the number of grooves 21, the thrust force decreases. Also, the angle α
The thrust force increases as the angle increases up to about 60 degrees, and the thrust force does not increase even if the angle increases further.

Further, since it is desirable to adjust the thrust force by changing the spinning count, etc., it is possible to replace the drive drum 15a with one having a different groove spacing and angle depending on the spinning count and yarn material. good.

In addition to the shape shown in FIG. 3, the cross-sectional shape of the groove may also be triangular as shown in FIG. 4, and various other forms are possible without departing from the spirit of the present invention.

Effects of the invention As detailed above, in the present invention, during winding of spun yarn, a thrust force is applied to the yarn layer from the small diameter side of the cone to the large diameter side by the groove of the drive band, and the yarn layer is moved from the large diameter side of the cone. Since it is possible to prevent the cone from shifting toward the small diameter side, the cone shape becomes better.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a sectional view of the main part thereof, Fig. 4 is a sectional view of the main part of another embodiment, and Fig. 5 is a conventional device. FIG. 6 is a front view of the main parts thereof. P... Cone, 6... Traverse guide, 15
... Drive drum, 15a ... Drive band, 21...
...helical groove.

Claims (1)

[Scope of utility model registration request] In a device that brings a cone into pressure contact with a drive band provided on a drive drum, and winds a yarn traversed by a traverse guide onto the cone by rotational movement caused by the friction, the cone is placed on the surface of the drive band against the yarn layer. A cone winding device that has a helical groove that applies thrust force from the small diameter side to the large diameter side.