SU461995A1 - Arrangement for guiding the weft yarn in reed to a multi-weaving loom - Google Patents

Description

(54) DEVICE FOR THE DIRECTION OF A RAILWAY THREAD IN BERDO TO A MULTIPLE WEB MILLING MACHINE

yarn guide The latter includes a spring-loaded lever 9, pivotally connected to the yarn guide and carrying roller 10. The lever can be rotated around the axle. The roller 10 is in contact with the surface of the cam disc 11. The cam disc is driven from the reed shaft by a gear pair 12 at a gear ratio of 1: 1, whereby the speed of the cam disc corresponds to the speed of the reed shaft when it is formed by discs having only one notch. When using a reed with discs having several cuts, the number of revolutions of the cam disc is a multiple of the number of cuts and the number of revolutions of the reed. The end of the yarn guide 1 is bent to form the working part 13, the yarn guide is located in the guides 14.

The device works as follows.

On the spool of the plotter, the winding body 8 winds up the weft thread of the required length. At the end of the winding, the plotter moves to the movable pharynx along the axis of the Byrd 2 in the direction of arrow A. At the same time, the winding body 8 continues moving along a curved section in the direction of the arrow B. Tension between the plotter 4 and the winding body 8, the weft thread forms a line Byrd along the axis of the Byrd, an angle that continuously changes. Before the plotter enters the tensioning thread, the weft thread comes to the working part 13 of the yarn guide 1. The yarn guide, moving, deflects the weft thread to the position shown in FIG. 1 dotted line. In this end position, the lever 9 is pressed against the cam disc 11 in the zone of its minimum radius. The length of the weft yarn between the plotter and the winding body is divided by the working part 13 into two sections, forming between them an angle different from 180 °. In the embodiment shown in FIG. 1 the dotted line position of the plotter 4 and the winding organ 8, when the weft thread enters the notch 7 of the first Byrd disc, the angle a is corrected to the value

identical angle of inclination of the helical groove formed by the notches of the disks.

The cam disk -11 must be shaped in such a way that the angle a in each position of the yarn guide (during its reciprocating movement) would remain constant until the second extreme position of the thread 1 shown in FIG. 1 solid line. In this extreme position, the weft thread is nailed to the edge of the fabric with the first disc 6.

Subject invention

Claims (2)

1. A device for guiding the weft yarn in a reed to a multi-weaving loom, characterized in that, in order to ensure reliable refueling of the weft yarn in a reed, it contains a yarn guide located between the reed and the charging mechanism of the weft yarn of the machine and the return thread translational movement of the yarn guide relative to the reed. 2. The device according to claim 1, characterized in that the means for reciprocating movement of the yarn guide comprises a lever pivotally connected with the yarn guide, and a cam disk cooperating with the lever. iJS, 1 P 2