JPH0310733B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for removing residual roving from a roving bobbin that is wound up in a roving frame and unwound in a spinning frame.

Prior Art The process of drawing and twisting a sliver using a roving frame to create a roving (so-called "shino"), winding it onto a roving bobbin via a flyer mechanism, and then transporting and feeding it to a spinning frame is , is an important process in a spinning factory.

If the winding start of the roving is fixed to a part of the circumferential wall of the tube of the roving bobbin, the start of winding by the flyer will be extremely smooth, and various measures have been taken to achieve this. A special type of flocked cloth, the so-called states king cloth, is made by flocking elastic synthetic resin bristles such as nylon on the surface of the base fabric, and laying these bristles in one direction to form a kind of brush surface. Some methods are used in which the roving is attached in a ring shape onto the bobbin tube and the winding start of the roving is fixed to this.

When this method is used, the winding direction of the roving on the roving bobbin and the laying direction of the statesking cloth are made to be opposite to each other, so that the fibers constituting the roving are statesking. It can be tightly fixed against the hair of the cloth.

However, when a roving bobbin with roving wound up using this method is unwound on the creel of a spinning machine, the hair of the States King cloth and the fibers constituting the roving are Because some of the fibers are strongly engaged with each other, even when the roving bobbin is empty, there is an unavoidable tendency for a large number of fibers to remain on the surface of the states king cloth. It is something. This residual fiber (hereinafter referred to as "residual yarn") significantly impairs the adhesion between the next winding start of the roving and the states king cloth, so conventionally, this residual yarn had to be removed manually. They were forced to do extremely inefficient work.

Therefore, a method has been proposed in which the remaining threads on the States King cloth are efficiently removed using air (Japanese Utility Model Publication No. 6754/1983). This device rotates the roving bobbin while pressing a flexible member such as rubber or synthetic resin against the states king cloth, and blows air in the tangential direction of the states king cloth, and the remaining yarn on the states king cloth is First, it is mechanically rubbed with a flexible member and lifted off the statesking cloth, and then it is blown away with air and can be easily removed.

Problems to be Solved by the Invention However, when using such prior art,
States king cloth suffers from severe wear and tear due to being rubbed by the flexible member, and also has the problem of being easily peeled off from the roving bobbin. In other words, States King cloth is generally attached to the roving bobbin tube in a circular shape using double-sided tape, etc., so that it can be easily replaced if it becomes damaged. In order to mechanically raise the remaining yarn by rubbing it, a considerable amount of pressure is required, and therefore,
The coat of the States King cross may be damaged prematurely or
Troubles such as the States King cross itself peeling off were unavoidable.

Therefore, in view of the actual state of the prior art, an object of the present invention is to completely eliminate the risk of harmful damage or peeling of the States King cloth by blowing off the remaining yarn attached to the States King cloth using only air. An object of the present invention is to provide a method for removing residual roving from a roving bobbin.

Means for Solving the Problems The configuration of the present invention for achieving the above object is such that when removing the remaining yarn on the states king cloth of the roving bobbin, the roving bobbin is moved in the same direction as the winding direction of the roving. While rotating, the air from the air nozzle is blown almost tangentially to the States King cloth in a manner that opposes the rotation of the roving bobbin, and the gist is to make sure that the air at this time covers the entire width of the States King cloth. shall be.

Effect With this configuration, the air from the air nozzle is blown from the back side of the hair laid on the surface of the States King cloth in a direction to remove the fibers engaged there, so that the air from the air nozzle is blown in the direction of removing the fibers engaged there. The remaining yarn attached to the surface can be efficiently turned up into a sheet and blown away.

Example Examples will be described below with reference to the drawings.

A roving bobbin 10 for winding up roving X by a roving frame is, for example, as shown in FIG. That is, the flanges 12 and 13 are fitted to both ends of the plastic tube 11, and a small pitch concave groove forming part 11a is formed on a part of the peripheral wall of the tube 11 to prevent the roving X from slipping.
11a... are provided partially, and a states king cloth 14 is attached below in an annular shape.

Assume now that the direction in which the roving yarn X is wound around the roving bobbin 10 in the roving machine is clockwise when viewed from above the roving bobbin 10 (in the figure, the spiral direction of the roving yarn X is indicated by the two-dot chain line). .

States King cloth 14 has base fabric 14b,
A large number of elastic hairs 14a, 14a, etc. made of nylon etc.
The bristles 14a, 1 are implanted to form a brush-like surface on the surface of the base fabric 14b (Fig. 2).
4a... are laid and inclined in the circumferential direction of the tube 11 in a direction opposite to the winding direction of the roving X (arrow Z in FIG. 2). Therefore, roving X
At the beginning of winding, each of the fibers constituting the roving engages the inclined hairs 14a, 14a... in a direction in which they come into close contact with each other. It can be fixed well.

Wrap the roving X in multiple layers on the roving bobbin 10,
When the spun yarn is conveyed onto the spinning machine creel and unwound, some roving X is usually left on the tube 11 of the roving bobbin 10 to prevent the yarn from being cut in the spinning machine. In this state, roving is performed. The remaining roving yarn ) is the roving X
Even if the hairs 14a, 14a... are unwound, the fibers constituting the roving X are tightly engaged with each other, so
This leaves only a large number of fibers remaining on the surface of the states king cloth 14. This residual fiber (hereinafter referred to as residual yarn x) significantly impairs the adhesion of the next winding of the roving yarn X.

The present invention relates to a method for effectively removing the remaining yarn x in such a state.

Comparative Example The roving bobbin 10 with the remaining yarn x attached to the surface of the States King cloth 14 is stood upright, and is at the same height as the States King cloth 14, and
The nozzle N is arranged so that its direction is substantially tangential to the states king cloth 14 (FIG. 3). The shape of the nozzle N is as shown in Fig. 4A, the diameter of the nozzle hole Na is 1.5 mm, the distance from the tip of the nozzle N to the contact point of the roving bobbin 10 is 70 mm, and the nozzle N is loaded with 5 kg/cm ² . g of compressed air is supplied to blow out air from the nozzle hole Na. Also,
The roving bobbin 10 is rotated in the same direction as the winding direction Z of the roving X.

At this time, air is blown from the direction shown by arrow A in FIG. 2, and the remaining yarn x is efficiently stripped from the hairs 14a, 14a, etc. of the states king cloth 14, and is blown away. be able to.

Note that even if the air blowing direction was somewhat biased from the tangential direction of the roving bobbin 10 to the direction of its center axis, no adverse effect was observed on the residual yarn removal effect.

Example When the tip shape of the nozzle N was made as shown in FIG. 4B and C, much better results were obtained than in the comparative example. In other words, in Figure C, by making the nozzle hole Na into a slit shape, the air ejected from there can be uniformly blown to cover the entire width of the states king cloth 14, so that the remaining yarn x
The effect of stripping off the whole width in a sheet form at once is remarkable, and therefore, the required residual yarn removal time can be significantly shortened compared to the case of A in the same figure.

In the case of B in the same figure, there are two nozzle holes Na,
The flow of air ejected from the nozzle holes Na and Na covers the entire width of the states king cloth 14, and the performance was intermediate between those shown in A and C in the same figure.

Effects of the Invention As explained above, according to the present invention, while the roving bobbin is rotated in the same direction as the winding direction of the roving, the roving bobbin is rotated substantially tangentially to the states king cloth against the rotation of the roving bobbin. By blowing air over the entire width of the States King cloth, the air is blown from the back side of the bristles that are laid in one direction on the surface of the States King cloth. In particular, the remaining threads that are tightly engaged with the wool are pulled out from the wool over the entire width of the States King cloth, and are stripped off in a sheet at once, so it is extremely efficient and can be easily removed from the roving bobbin. Not only can the remaining threads of the States King cloth be removed, but since no parts are used that come into mechanical contact with the States King cloth, there is no risk of harmful damage or peeling of the States King cloth, which is an excellent effect. .

[Brief explanation of the drawing]

FIG. 1 is a perspective explanatory view of a roving bobbin, and FIG. 2 is an enlarged sectional view taken along the line Y--Y in FIG. 3 and 4 are explanatory diagrams of the implementation situation, FIG. 3 is an explanatory diagram of the arrangement of the nozzle and the roving bobbin, and FIG. FIG. 3 is a cross-sectional view illustrating the shape of a nozzle. X: roving, x: remaining yarn, Z: roving winding direction, 10: roving bobbin, 11: tube,
14... States King Cross.

Claims (1)

[Claims] 1. When removing the remaining yarn on the States King cloth of the roving bobbin, while rotating the roving bobbin in the same direction as the winding direction of the roving yarn, rotate the yarn in a direction approximately tangential to the States King cloth, relative to the rotation of the roving bobbin. A method for removing residual roving yarn from a roving bobbin, which comprises blowing air from an air nozzle in a reverse direction so that the air covers the entire width of the states king cloth.