Device for contactless driving of shuttles in reeds of circular looms

Abstract

The invention relates to a device for driving a shuttle (1, 1') that can be moved in the reed (17) of a circular loom along a circular orbit (16) without contact, comprising at least one permanent magnet (29, 29') on the shuttle (1, 1') and at least one magnet (22, 22') that is operatively connected to the at least one permanent magnet (29, 29') of the shuttle (1, 1') and that is arranged on a drive element (10) that can be moved concentrically to the orbit (16) of the shuttle, wherein an air gap (11) is formed between the shuttle (1, 1') and the drive element (10). The at least one permanent magnet (29, 29') of the shuttle (1, 1') and the at least one magnet (22, 22') of the drive element (10) are polarized in such a way that the at least one permanent magnet of the shuttle and the at least one magnet of the drive element mutually attract each other by means of magnetic forces and thus form a magnetic attraction section (14).

Description

technical field [0001] The invention relates to a device for contactlessly driving a shuttle (Schuetze) movable along a running track (Umlaufbahn) in a reed (Riet) of a circular loom (Rundwebmaschine) with at least one A permanent magnet with at least one magnet in operative connection with at least one permanent magnet of the shuttle, the magnet is arranged on a drive element that can move concentrically to the running track of the shuttle, wherein a gap is formed between the shuttle and the drive element . Background technique [0002] In the prior art, for example the following devices are known for contactlessly driving the shuttles of circular looms: [0003] Document EP 0 167 831 A1 presents a weaving shuttle equipped with a permanent magnet on the rear side in its direction of movement, which is in operative connection with a permanent magnet of the same polarity fastened at the running drive element, And this is driven by magnetic repulsion. The advantage of this ...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of these two embodiments is that the geometric design of the gap is achieved by the magnets at the rear end of the weaving shuttle and possibly also at the front end of the weaving shuttle, and thus the cooperating magnets at the drive element (which behind or in front of the shuttle, but must at least be positioned obliquely thereto) the necessary arrangement cannot be realized and excludes the danger that the warp thread guided through this gap is exerted on the magnet

Although the partition at the housing of the weaving shuttle can somewhat alleviate this problem, it cannot thereby solve the problem

A further disadvantage of the known drives for the weaving shuttle is that, despite the magnetic drive, the shuttle, as before, moves on guide rollers on its track in the reed, which is pulled over by rolling over void warp

In addition to the mechanical load of the thin belt and the necessary maintenance work at the guide rollers configured as wearing parts - especially in modern machines with high production capacity, which with very fast running weaving shuttles and This requires high forces and rotational speeds - there is also the risk that the yarn is applied to the edges of the magnets or guide rollers and is damaged by them

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