DE1987610U - Device for guiding and tensioning of lower straps on drafting systems of spinning machines - Google Patents

Description

616 668-28. iö.ö /. '' Si '

Walter Donath

8522 Herzogenaurach

Ugerländer Str »3

October 26, 1967

Device for guiding and tensioning lower belts on drafting systems of spinning machines «

The innovation relates to a device for guiding and tensioning of lower aprons on drafting systems of spinning machines, consisting of a pivot mounted around a support rod Support on which a spring engages and at its free end an axis running parallel to the support rod is attached on which a roller, in particular by means of roller bearings, is rotatably mounted *:

For guiding and tensioning lower aprons ...- * v Clamps and idlers known * Clamps have the Disadvantage that a relatively large amount of driving force is consumed and that the apron wear is high. Me widespread Use of clamps is explained by the fact that they are a particularly good strap guide ensure through their fixed guide rims * The On the other hand, previously known tensioning rollers have the disadvantage poor guidance of the lower apron, however, they only require very little drive energy. especially then $ when they 'roller bearings öihd «'

The innovation is based on the task of a device for guiding and tensioning lower aprons on drafting systems of spinning machines, which have the advantage of the low drive energy that a tensioning roller requires the good strap guidance of the clamping bracket connects.

This object is achieved according to the invention in that on Both sides of the roller are arranged non-rotatable guide rims. This ensures that the lateral approach of the lower apron took place against fixed shelves While with the known tensioning pulleys the apron tends to slightly To climb up on the shelves that rotate with the roller, it will be in the implementation of the renovation of the undreb / · hindered by guide ribs.

A particularly advantageous embodiment of the innovation consists in that the non-rotatable guide rims have a longitudinal section in the form of an L, whose to the roller axis Right-angled leg accommodates the lateral approach of the lower apron and on its parallel to the roller axis Leg the edge of the lower strap slides »This embodiment has the advantage that the lower apron closes the gap between the edges of the roll and the guide ribs covered and thus protecting the storage of the roll against ingress of fiber fluff »

However, since the lower apron does not completely wrap around the roll, a further seal of the bearing can thereby be achieved be achieved that the belts of the roll on the one hand and the legs of the guide rims parallel to the roll axis on the other hand, stepwise to seal each other overlap.

A further improvement in the leadership qualities of the innovation according to the device for guiding and tensioning lower aprons can be achieved in that the lateral surface the role is convex in a known manner.

In the drawings, three exemplary embodiments of the innovation are shown and are described in more detail below.

FIG. II shows a section through a device according to the invention for guiding and tensioning lower aprons on drafting systems of spinning machines, in which the Roll and the guide rims are made of plastic.

Figures 2 and 3 show embodiments in which / these parts are made of sheet metal *.

In Figure 1, the carrier 1 is loaded by the spring 2 and carries an axle 3 on its free sin

two parts 4 and 5, made here of plastic, are fastened with a snap ring 6. The two ball races 7 'on which the roller 8 is rotatably mounted run on them. The parts 4 and 5 have 8 guide rims 9 and 1oj on both sides of the roller which accommodate the lateral contact of the lower strap 11. The outer surface of the roller 8 is designed to be spherical for better guidance of the lower apron 11. Its edges slide on surfaces 12 and 13 of parts 4 and 5 that are concentric to the roller axis and thus cover gaps 14 and 15 in a sealing manner. However, since the lower apron only partially wraps around the roller 8, the edges of the roller and the parts 4 and 5 overlap in a stepped manner for better sealing of the bearing. ^{The surfaces 1,} 16 and 17 which are concentric to the roller axis can advantageously be provided with knurling «

In FIG. 2, the roller 18 and the parts 21 and 22 carrying the guide rims 19 and 20 are made of sheet metal. The lower apron 11 rests exclusively on roller 18. The bearing is sealed like a gap seal through the edges of the roller and the surfaces 23 and 24 of parts 21 and 22 which are concentric to the roller axis.

Figure 3 also shows an embodiment made of sheet metal * that of the corresponds to the embodiment made of plastic shown in Figure 1, but with the parts 25 and 26 and the roller 27 made of sheet metal are made * '·,,

Claims (2)

■■■: ■■■ ■ J ^: RA.6166G8; * 2ff.m67 Donath.
Herzogenaurach> ^ Egeriänder Str * 3 ^: . :. '26 * October 1967' Protection claims 1 * Device for guiding and tensioning lower aprons on drafting systems of spinning machines, consisting of a support pivoted about a support rod, on which ¹ engages a spring and at the free end of which an axis running parallel to the support rod is attached, on which a roller, is rotatably mounted in particular by means of roller bearings, characterized in that non-rotatable guide rims are arranged on both sides of this roller. 2. Apparatus according to claim 1, characterized in that ,. the non-rotatable guide rims have a longitudinal section in the form have an L whose leg, which is at right angles to the roller axis, receives the lateral approach of the lower apron and on its leg parallel to the roller axis the edge of the lower strap slides. 3 · Device according to claim 2, characterized in that the edges of the roller on the one hand and that to the roller axis parallel legs of the guide rims on the other hand overlap each other in a stepped manner for sealing. 4 *. Device according to one of the preceding claims, characterized »that the outer surface of the should is formed convex in a known manner.