SU753946A1 - Twined selvage forming device to loom - Google Patents

Description

one

The invention relates to weaving and is intended for use on shuttleless weaving machines, on which the weft thread is laid in separate lengths. five

A device for forming a leveraging edge to a weaving machine, comprising a carrier mounted on a machine body rotatably, holders of the yarn reels located on the carrier arms, and a means for compensating the tension of the leno threads p-} is known.

The disadvantage of this device is that the tension is compensated by rotating the coils in the direction opposite to the exit of the winding thread, and their braking is by friction of the end of the coil under the action. 20 springs.

 It is also known a device for forming a leveraging edge to a loom, comprising a carrier mounted on the machine frame with rotational capability, and holders of the winding yarns placed on the carrier's shoulders symmetrically with respect to the axis of its rotation 2. In addition, it has compensation means 30

tensioning the leno threads, located on the spool holders.

The disadvantage of this device is that the presence of a gear transmission excludes the possibility of adjusting the height of the weaving shed, while in practice various weaving machines have different weights of the weaving shed. In this case, each type of machine must have its own, different from other technical parameters, leasing device.

The aim of the invention is to expand the technological capabilities of the device for forming a leveraging edge on a loom by providing adjustment of the height of the shed formed by the leno threads and maintaining a constant tension of the leno threads when forming the levoking edge.

The goal is achieved by the fact that the device for forming the leap edge is made in the form of a rotating carrier synchronously with the main shaft of the machine, in the arms of which there are radial grooves whose extreme symmetrical points correspond to the minimum and maximum dimensions of the possible height of the shed on the weaving

the machine, and in the slots of the carrier, symmetrically, the center of rotation is set by holding the coils with the winded thread directed to the zone of forming the winder edge through the guide posts with eyes. Tension of the yarn yarns is ensured (spring-ratchet compensators located on the holder and x1 tusters).

FIG. Figure 1 shows the proposed device for forming a leveraging edge on a loom, type of assembly; in fig. 2 - the same, front view.

In the bearing of the bracket 1, a shaft 2 is fixed, receiving rotational movement from a drive (not shown). A carrier 3 is mounted on the shaft 2, in the radial grooves of which the housings 4 of sliders of coils 5 are made symmetrically to the center of rotation, made in the form of spring-ratchet compensators ensuring constant tension of the winding yarns 6. Each of the two coils 5 is put on the ratchet 8 protruding sleeve 7, which is locked by a spring-loaded pawl 9. The stringing yarn, descending from the coil 5, is successively passed through the eye 10 Rack guide 11, eyelet compensating rod 12, the eye 13 of the rack 11 is guided into the tissue and OPUK perevivaets there with the second filament to form the leno edge. The bar 12 is installed on the lever 14, spring-loaded spring 15 The device operates as follows.

When the carrier 3 rotates, the coils 5 with the winding thread 6 mounted on it rotate with it. During one revolution of the carrier 3, two sheds are formed, into which two weft threads 16 are laid successively. As the winding thread b compensates the bar 12 under the action of the thread moves and retracts the spring-loaded lever 14 which is associated with it, which in turn acts on the spring-loaded dog 9 and disengages it from the ratchet 8, releasing it. At the same time, the ratchet 8 and its sleeve 7 with the coil 5 put on it turn under the action of the thread. The rotation of the coil 5 and the BITII 6 tempering continue until the spring-loaded lever 14 rotates and releases the pawl 9, which, under the action of its spring, locks the ratchet 8. After locking the ratchet 8, the thread is expended by the loop formed by it into the frog 10 and 13 stand 11 and the eye of the compensating bar 12, and then the compensation cycle is repeated.

The tension of the levity thread is regulated by the degree of loading of the lever 14 by the spring 15.

The height of the pharynx, formed by 5 yarns 6, is set by moving the bodies 4 of the holders of the coils 5 along the slots of the carrier 3.

The proposed device for forming the leap edge on the shuttleless loom improves. The quality of the edges of fabrics produced on shuttleless looms, expands the technological capabilities of shuttleless looms and allows them to produce dense fabrics for technical and domestic purposes.

Claims (2)

1. USSR author's certificate No. 406980, cl. .D03 B 47/40, 1973 .. 2. Swiss patent number 426676, cl. 86 C, 14 / 15-1967 (prototype).