SU1219690A1 - Mechanism for feeding weft yarn to weft inserter of loom - Google Patents

Description

This invention relates to the textile industry and can be used on shuttleless weaving machines.

A weft yarn feed mechanism to a weaving loom is known, which comprises a pneumatic nozzle, a hoop drive made in the form of a hollow body of rotation with end inlet and outlet holes for the thread and connected to the hoist drive Ci.

A disadvantage of the known mechanism is that it does not provide reliable and continuous feeding of the thread to the accumulator. The accumulation cycle is reversed, as a rule, after all the yarn has been triggered, the names in the drive. In the intervals between cycles, the threading is done directly, the plotter picks up the weft thread directly from the feed package. There are undesirable for the technological process of laying the weft thread periodic dynamic jerks.

The purpose of the invention is to increase reliability in operation by creating a constant tension of the thread.

This goal is achieved by the fact that the feed mechanism of the weft yarn to the weaver plotter, which contains a pneumo-eye, a drive made in the form of a hollow body of rotation with end inlet and exit holes for the thread, and a thread-brake connected to the drive, is connected to the nozzle and the drive made in the form of a truncated cone, with the nozzle installed coaxially in the cavity of the drive and fixed at one end at its end with a smaller diameter, and has a flange at the free end, and the thread brake is made in the form of d Vuh horizontal plates arranged one above the other - the upper of which has a concave section facing the thread and a vertical section located opposite the outlet of the drive, and is installed with the possibility of rotation about a horizontal axis fixed on the end of the drive with a large diameter.

In addition, the plates on the working surfaces are coated with a pile material.

The drawing shows the proposed; device.

The feed mechanism of the weft yarn 1 to the weaving machine wearer has a pneumatic nozzle 2 communicating with the air nozzle 3, a hopper 4, made in the form of a truncated cone formed of metal rods longitudinally arranged with a clearance, fixed in the end rings 5 and 6, while the nozzle 3 is installed coaxially in the cavity of the accumulator 4, fixed at one end at its end 5 with a smaller diameter and having a flange 7 at the free end. The thread brake is made in the form of two horizontal plates 8 and 9 arranged one above the other, the top 8 of which has a concave section facing the thread, and a vertical section located opposite the outlet n-akopitel and installed with the possibility of rotation about a horizontal axis fixed on the end 6 of the drive And with a large diameter. Plates 8 and 9 on the working surfaces are coated with 10 of the pile material.

The mechanism works as follows.

 When compressed air is supplied to the pneumatic nozzle 2 by ejection, the thread 1 is unwound from the feeding package 11 and sucked into the channel of the pneumatic nozzle 2. When leaving the channel, the thread is picked up by the active air stream and accumulates in the cavity of the accumulator 4 by closed spiral turns. At the same time, the initial turn of the thread, moving in the cavity of the accumulator 4, reaches the end 6 of the accumulator with a large diameter and stops at the exit orifice, adjacent to the vertical portion of the upper plate 8 of the brake.

Before starting the machine, the plate 8 is raised, the weft thread 1 is pulled along the plate 9, after which the plate 8 is lowered, covering the stretched thread. Next threading is normal.

When the machine is put into operation during each process of rolling, the coils of the backup yarn are successively exited from the accumulator 4 through the exit opening. The exit coil moves along the concave portion of the upper plate 8 by means of a pile covering 10

31219690

plates 8 and 9, the thread 1 is directly cut off. Thus, in the accumulator with the switch the relatively equal amount of the reserve thread is braked on the section.

The proposed stabilization mechanism When exiting the accumulator 4, the process of laying the weft f leg and the coil leg, the remaining mass of the accumulated filament on the machines, is simple in the design of the backup yarn unhindered, reduces the consumption of compressed air through the cavity of the accumulator, reduces the breakage of the filament, 4 follows the exit coil, and the new number of waste yarns and can be used for winding, thanks to constant use on shuttleless high traction force of the pneumatic nozzle 2, high-speed weaving machines with a large in storage 4. filling width.

Claims (2)

1. MECHANISM FOR SUBMITTING A WASTE THREAD TO A LAYER LAYER, comprising a pneumatic nozzle made in the form of a hollow body of revolution, a drive with end inlet and outlet openings for the thread and a thread brake connected to the drive, characterized in that, in order to increase operational reliability by creating a constant workflow the thread tension, it is equipped with a nozzle in communication with the pneumatic nozzle, and the accumulator is made in the form of a truncated cone, while the nozzle is installed coaxially in the accumulator cavity and is fixed at one end to its end with a smaller diameter ohm, and has a flange at the free end, and the thread brake is made in the form of two horizontal plates located one above the other, the upper of which has a concave section facing the thread and a vertical section opposite the drive outlet, and is rotatably mounted relative to the horizontal axis mounted on the end of the drive with a large diameter. 2. The mechanism according to claim 1, characterized in that the plates on the working surfaces are coated with pile material. SU, .., 1219690> π