SU800257A1 - Weft compensator of shuttleless loom - Google Patents

Description

data of machine parameters and assortment of processed yarn.

As a result, the weft thread in the compensator zone is eliminated and the reliability of laying it in the throat is increased. ;

FIG. 1 shows the mechanism of weaving yarn commencement with a gear ratio of a ganetar drive equal to 2: 1; in fig. 2 - the same, with a gear ratio of 3Jl.

The compensation mechanism of the weft yarn of the shuttleless loom contains a fixedly fixed coaxial shaft 1 of the drive sun wheel 2

A lever 3 is fixed on the shaft 1 with a satellite 4 mounted on the end of rotation. Satellite 4 has a radially fixed carrier element, made in the form of a lever S with a groove 6, in which the yarn feeder 7 is attached with the possibility of adjusting it. The bobbins 8 weft thread passes through the winding rollers 10 thread guide 11, thread guide 7 and thread guide 12 and is guided to the feeding foil (not shown).

When the mechanism is in operation, the yarn feeder achieves a complex movement consisting of rotation of lever 5 together with satellite 4 and lever 3 around Shaft 1 and rotation of lever 5 together with satellite 4, which run around the sun wheel 2.

Thus, the yarn feeder 7 makes movement in the plane along the nipocyclede.

When the gear ratio of the planetary drive is 2: 1, the yarn feeder 7 performs a reciprocating motion, i.e. moving along a straight ABC, passing through the center of the sun wheel 2 (Fig. 1).

In the area ab-5 of the yarn feeder 7, the weft thread 9 is accumulated due to the release by the winding rollers 10. This corresponds to the end of the rapier exit and the beginning of their entry into the mouth. In addition, when the rapier leaves the yarn, the yarn feeder 7 will be able to pull out the laid weft thread from the pharynx to ensure its necessary tension during trimming. When the rapier enters the shed, the yarn feeder 7 prog continues to pull the thread from the feeding rapier in order to remove the cut end of the weft yarn into the rapier.

In the section a-b of the movement of the yarn feeder 7, a weft yarn is fed for laying into the throat. This corresponds to the period of approaching the rapiers, the time of their meeting, and the period of divergence.

During the period of approaching the rapier, the weft thread, smoothly delivered by the yarn guide 7, begins to move in the feeding rapier and by the time of their closest approach, its end reaches the level of the toe of the feeding rapier. At the moment of maximum approaching rapier

The transfer of the end of the weft yarn from the feed rapier to the host takes place. In the period of divergence, the rapier weft thread, which is supplied by the yarn feeder 7, continues to move smoothly in the receiving rapier until the arrival of the infeed driver 7 to point a.

When the gear ratio of the planetary drive, equal to 3: 1, the yarn feeder 7 makes a movement along the a-b-in-a trajectory (Fig. 2), having a shortened stroke relative to the sun wheel 2.

At the site, abb of movement of the yarn feeder 7, a weft yarn accumulation occurs, which corresponds to the end of the exit of the rapier from the pharynx and the beginning of their entry into the pharynx.

In the area b-in the movement of the yarn feeder 7, the accumulated length in the area a-b of the weft yarn remains almost constant. The movement of the end of the weft yarn in the feeding rapier will occur only at the expense of feeding it with the winding rollers 10. In the area in the movement of the yarn feeder 7, an accumulated weft yarn is issued for laying it in the throat.

The first embodiment of the weft yarn compensation mechanism (Fig. 1) is recommended for processing low weft yarn numbers. It is known that with an increase in the diameter of the weft yarn (decrease in number), the limiting speed of laying the weft yarn into the shed decreases. Therefore, for reliable laying of the weft yarn in the throat, it is necessary to reduce the feed rate of the compensator. This is achieved by applying the hypocycloid law of motion of the yarn feeder.

The second embodiment of the weft yarn compensation mechanism (Fig. 2) is recommended for processing medium and high weft yarn numbers, since the reduced yarn guide entry provides a longer yarn length in the feed spoiler. The tension of the thread increases in this case, and this makes it possible to increase the feed rate of the weft thread by the compensator.

The use of the proposed mechanism will make it possible to reduce such a defect in the fabric as undershoots due to ensuring smooth feeding of the weft yarn into the shed.

Claims (2)

1. The compensation mechanism for the weft yarn of the loopless weaver 9 of the machine tool, containing a yarn feeder placed with the possibility of shifting into the groove of the carrier element mounted rotatably from the actuator, in order to improve reliability, the drive is made planetary, the solar wheel of which is fixed, and the carrier element includes a lever with a longitudinal groove, mounted radially on the satellite. 2. A mechanism according to claim 1, characterized in that the gear ratio of the planetary drive is 2: 1. 3, The mechanism of claim 1, wherein the gear ratio of the planetary drive is 3: 1. Sources of information are one in BHHMaHlie during examination 1. USSR author's certificate No. 583219, cl. O 03 O 47/36, 1975 (prototype).