DE1801044A1 - Guide device for the weft insertion member of a loom - Google Patents

Description

T. 341

Sulzer Brothers Aktiengesellschaft, Winterthur (Switzerland)

Guide device for the weft thread insertion element of a weaving machine

The invention relates to a guide device for the weft thread insertion element of a loom, which device a number of the insertion element leading into the Shed in and out again contains guide elements.

In a known guide device of this type, nothing but identical guide elements are arranged. They are beak-shaped formed and encompass the entry member essentially on all sides. Each guide element has the same number of » z.3. three guide surfaces that come into contact with the entry organ. As a rule, two of them come into contact from below with the lower mating guide surfaces of the entry member, one third guide surface comes from above with an upper counter-guide surface of the entry organ in contact.

This known guide device has particularly much Points of contact with the entry organ, so that the metallic abrasion on the guide surfaces of the guide elements and on Entry organ is relatively large. The guide elements of the known guide device must also be in the direction of passage of the entry organ must be adjusted particularly precisely.

909827/0961
BATHROOM OBlQINAL

Either a specially designed fastening device is required for this or very precise work is required when attaching the guide elements.

The invention is based on the object of creating a guide device which is particularly improved in this respect. The invention consists in that at least 'some of the Guide elements only have guide surfaces that do not have all of them on the entry organ

Counter-guide surfaces but only with part of them, e.g. "B" come into contact with one or two mating guide surfaces of the insertion member during the weft insertion.

The number of points of contact between the insertion member and the guide elements during the weft insertion can thus be significantly reduced, for example reduced by half. There is then less metallic abrasion on the guide elements and the entry member, so that the warp and weft threads or the fabric are less soiled. This is particularly important in the case of fabrics made from synthetic yarns. It is known that the individual threads consist of a large number of endless _s absolutely smooth, compactly juxtaposed individual fibrils (elementary threads). The metal dust does not settle there between the threads, but on the surface of the fabric, so that the dirt _$, as experience shows, can be seen particularly clearly on the finished fabric.

- 3 ~

909827/0961

BATH ORIGINAL,

Furthermore, the entry member experiences as a result of the reduction in the points of contact between it and the guide device less loss of speed during weft insertion. As a result, the time for the individual weft is shorter, so that the Increase the number of shots.

Further features emerge from the following description of an exemplary embodiment in conjunction with FIG Drawing and the claims.

Fig. 1 is a schematic cross section through

a rapier shuttle loom with a guide device designed according to the invention.

Fig. 2 shows on a larger scale a number of guide elements in a view in the direction according to arrow 71 in Fig. 5,

FIGS. 3 and 4 illustrate two of those shown in FIG Guide elements of various types in side view and

Fig. 5 shows a perspective view of some assembled guide elements.

The loom has a frame which consists of two cheeks and longitudinal members 22, 23. The warp threads 25 are of a warp beam 24 stored in the machine frame and unwound via a tensioning beam 26 and a warp thread monitor device 27 led to a shed 29. This is through

909827/0961

Shafts 31 formed by a drive device 32, e.g. an eccentric machine, are set in motion.

On a drawer 34 driven by a drawer shaft 41 there is a reed (leaf) 33 and in front of it one out

Guide teeth η

a larger number / existing rifle command, designated as a whole with 35. They each become a grapple shooter 49 (FIGS. 4, 5) shot into the compartment when the shooter guide 35 is moved into the compartment 29 according to arrow 28. the Shop shaft 41 is driven by a weaving machine main shaft 40. The finished fabric 19 reaches a tree 39 via rollers 37, 38.

In Fig. 2 a number of shooter guide elements 42,52 is shown. They are on the drawer 34 by means of a bracket-like holder 44 and screws 45 attached. In Fig. 3 the hook-shaped Guide elements (guide hooks) 42 and, in FIG. 4, the two-legged guide elements (guide supports) 52 are illustrated. The guide hook 42 has an upper, wide end 53, which is also shown in dashed lines in FIG. 4 to illustrate the overall effect is drawn. The end 53 engages over, as can be seen from FIG. 4, the gripper contactors 49 from above, by means of whose weft thread is entered into the compartment 29. The end 53 has a guide surface 54 in the portion 15, which cooperates with an upper mating guide surface 55 of the shooter 49. The guide hook 42 makes the shooter 4 9 mainly prevented from jumping out in Fig. 4 upwards.

As can be seen from FIG. 5, a guide support 52 is arranged on the drawer 34 between each two guide hooks 42.

909827/0961

BADORIQIMAL - 5 -

- J -

It has a lower support head 56 and a higher one Support mandrel 57. The support head 56 has in part 14 a guide surface 58 through which the shooter 49 on its counter-guide surface 61 is guided from below, the stub 57 has in part 13 a guide surface 62, by means of which the shooter also from below on his counter guide surface 63 is performed.

The guide hook 42 also has in the lot 10 at the Interface 63 has a cross section A which is significantly smaller in comparison to cross section B in part 15. In corresponding In this way, the support head 56 in part 12 at the interface 64 has a compared to the cross section C. in section 14 at the guide surface 58, the cross-section D is significantly smaller and the support mandrel 57 in section 11 at the interface 65 has a significantly smaller cross-section F compared to the cross-section E in part at the guide surface 62. Due to the cross-sectional constrictions at A, D, F of the guide elements 4, 2.52, the end 53 as well as the support head 56 and the support mandrel 57 according to arrows 72, 73, 74 in FIG. 3, 4 can essentially Swing back and forth a little in the direction of the plane of the drawing when the shooter 49 closes his flight direction a little tends to change. As a result, the forces exerted by the shooter are resiliently absorbed by the guide elements 42, 52, so that the metallic abrasion on the guide surfaces 54,58,62 and 55,61,63 is decreased.

909827/0961

In a * modified embodiment, the Guide surfaces 58,62 arranged on separate guide elements. In this case, the result is the guide elements

42, for example, so that on a guide hook / attached to a special foot part 67 of the guide elements Support head 56 and then on a further foot part 67 attached support mandrel 57 follows j which is followed by a guide hook 42, etc. In this case, the guide surfaces are therefore 54,58,62 arranged on three different guide elements.

Another variant results when ζ · Β · the guide surfaces 54, 58 are arranged on one and the same guide element and the guide surface 62 is arranged on a further guide element are.

Further, for example, may also be the result of the guide elements 42 ₃ 52 getnäss Fig. 5 vary in that at certain intervals, for example, a guide tooth can be used _s the. _s having at which therefore of the supporting head 56 continues upwardly into the hook-shaped end 53, all three guide surfaces 54,58,62.

Another modification results if, for example, after two successive guide elements 52 a guide hook 42, then again two elements 52, then again a hook 42, etc. are arranged.

In the case of the guide hook 42, the cross-sectional constriction can, for example, lie in the portion 10 'instead of in the portion 10; the cross-section can then have the amount A ¹ , for example, as can be seen from the variant shown in dashed lines in FIG. 3.

909827/0961

Claims (6)

T.341 claims 1. Guide device for the weft thread insertion element of a weaving machine, which device contains a number of guide elements which guide the insertion element into the shed and can be moved back out again, characterized in that at least some of the guide elements (42 _S 52) only have guide surfaces (54 * 58, 62) which do not come into contact with all of the counter guide surfaces (61, 63; 55) located on the insertion member (49), but only with a part thereof, for example with one or two counter guide surfaces of the insertion member during the weft insertion. 2. Guide device according to claim 1, characterized in that that some (52) of the guide elements (42,52) only from below with lower mating guide surfaces (61,63) of the «Entry organ (49) coming into contact guide surfaces (58, 62), while other guide elements (42) only overlap the entry member (49) from above, with an upper one Have opposite guide surface (55) of the entry member coming into contact with guide surfaces (54). 3. Guide device according to claims 1 and 2, characterized in that the guide surfaces (58, 62) which come into contact with the entry member (49) only from below Guide elements (52) have two upwardly projecting support parts (56,57) which have guide surfaces (58,62). 909827/0961 4. Guide device according to claims 1 and 2, characterized in that the only from above the Inlet organ (49) overlapping guide surfaces (54) having guide elements (42) have a hook-shaped part (53) arranged above the inlet organ. 5. Guide device according to claims 1 and 2j thereby marked. that alternately each one Guide element (52) with guide surfaces (58, 62) and only coming into contact with the entry member (49) from below next to it a guide element (42) with guide surface only coming into contact with the entry member (49) from above (54) are arranged 6. A guiding device according to any one of claims 1 to 4, characterized _s that at least one of the guide surfaces (54; 58,62) having guide elements (42,52) in comparison to the cross section (3SB, S) of its with the insertion member (49 ) parts that come into contact <15,14,13) have a much smaller cross section (A, D, F) having part (12,11) which has a noticeable resilience of the guide element (42,52) in question in a substantially perpendicular to the direction of passage of the entry organ (49) located level allows. 90982 7/0961 Blank page