EP0566163B1 - Heald - Google Patents

Abstract

The heald is made multi-part to achieve length variability. <IMAGE>

Description

The subject matter of the application is a lifting heald, consisting of two legs of different widths, each end having a fastening element for receiving a heald frame, with means for magnetically controlling a lifting leg provided with two legs being arranged on the wide leg, the wide leg of the lifting heald being one Has stop for the half strand. Such a lifting wire is known for example from utility model DE-U 88 07 217.7.

A disadvantage of this lifting heald is that the metallic web of the half heald abuts against the inner web of the lifting heald during the reciprocal movement of the heald frames, and cuts the lifting heald there permanently. However, if the lifting heald is incised, there is a risk of binding errors occurring, because ultimately there is no longer any guarantee that the leno thread will surely pass from one side of the half heald to the other when changing the shed.

This disadvantage is remedied according to the invention in that the leg of the half strand strikes the stop with its lower free end. This ensures that before the web of the semi-strands on the inner web of the lifting strands strikes, the leg of the half-strand hits the stop with its free end. The distance of the stop from the inner web of the lifting health corresponds approximately to the leg length of the half heald. The stop itself is preferably made of plastic and should be arranged interchangeably in the leg of the lifting heald.

According to a further feature of this embodiment, the wide leg of the lifting heald has a guide slot for the half heald; the stop itself is arranged in the guide slot.

The formation of one leg of the lifting heald with a guide slot causes the half-heald to be guided precisely. This is of particular interest if magnets are provided in the wide leg of the lifting heald for magnetic control of the metallic half strands. The guide slot ensures that the half heald, even at high speed of the heald frames, is always gripped by the magnets.

In order to ensure in this embodiment of a lifting heald that no dust can accumulate in the guide slot, the width of the end of the guide slot provided in this leg is adapted to the width of the upper leg of the lifting heald, so that the end of the guide slot is exposed.

Fig. 1

zeigt eine Ansicht der Hebelitze einer ersten Ausführungsform;

Fig. 2

ist eine Seitenansicht;

Fig. 3

zeigt eine andere Ausbildung der Verbindungslasche;

Fig. 4

zeigt eine Verbindungslasche mit Öffnungen;

Fig. 5

zeigt eine Seitenansicht des Gegenstandes gemäß Fig. 4;

Fig. 6

zeigt eine Ansicht der Hebelitze einer zweiten Ausführungsform;

Fig. 7

zeigt eine Seitenansicht gemäß Fig. 6.

An example of an embodiment is shown in the drawing.

Fig. 1

shows a view of the lifting heald of a first embodiment;

Fig. 2

is a side view;

Fig. 3

shows another embodiment of the connecting tab;

Fig. 4

shows a connecting tab with openings;

Fig. 5

shows a side view of the object of FIG. 4;

Fig. 6

shows a view of the lifting heald of a second embodiment;

Fig. 7

shows a side view of FIG .. 6

As shown in FIGS. 1 and 2, the lifting heald, denoted overall by 1, consists of the upper leg 2 and the lower leg 3.

The lower leg 3 of the lifting heald is wider than the upper leg 2; both legs each have fastening elements 20, 21 on their ends for receiving the heald frames (not shown).

The connection of the legs 2 and 3 is carried out with the aid of a connecting lug, designated overall by 4, which according to the exemplary embodiment is a U-rail piece. The web of the U-rail section is designated 5.

At the end, this web of the U-rail section is tapered at 6 or 6a. Likewise, the cheeks 5a of the U-rail piece are tapered at 11 in order to offer only little resistance to the leno thread running along.

The connection strap is connected to the legs 2 and 3, e.g. with the help of rivets 7.

The production of strands of different lengths now takes place in that the legs of the strand are shortened accordingly, in order then to be connected to the connecting strap or the U-rail piece.

The wider leg 3 of the lifting heald has the guide slot 8 for the half heald 19. The upper end of the guide slot 8 is delimited by the web 3a, on which the web 19a of the half heald 19 rests during the entraining movement by the lifting heald.

The outlet of the guide slot 8 below is designated 12. So that this half heald 19 does not permanently cut the web 3a of the guide slot during the movement of the heald frames, a stop 10 in the form of a pin is attached in the guide slot. The leg 19b of the half-strand 19 strikes against this pin.

The pin, which is made of plastic, is detachably arranged in the leg 3, so that the possibility of exchanging this pin arises when worn. In front of the stop or pin 10 there are magnets 9 for controlling the half strands.

The legs 2 and 3 of the lifting heald 1 are made of plastic; on the other hand, there is the connecting tab, i.e. the U-rail piece 4 made of metal to make this part more wear-resistant; because in this area the leno threads run along.

Fig. 3 shows another embodiment of the lifting heald. The connecting tab 4a is adapted in the middle part at 13 to the width of the upper leg 2, whereby the dust removal, in particular of the dust pushed out of the guide slot 8, is facilitated, since the end 13 of the guide slot 8 is exposed due to this design of the connecting tab.

In FIGS. 4 and 5, the connecting link 4b is provided with openings 14, 15, the opening 14 in the cheek 16 and the opening 15 in the web 17 of the U-rail piece, so that dust removal is also ensured in this embodiment.

FIGS. 6 and 7 show a lifting heald in which the fastening elements 20, 21 arranged on the end of the lifting heald are attached to receive the heald frames. For this purpose, the fastening elements 20, 21 are each provided with a slot 20a or 21a, into which the legs 2 or 3 protrude.

The actual connection of the fastening elements 20, 21, which are made of plastic, with the respective leg 2 or 3, is carried out by gluing or welding, e.g. by welding with the help of the ultrasonic welding process.

With this lifting heald, the width of the lower leg 3 in the region of the end of the guide slot provided in this leg 3 is adapted to the width of the upper leg 2 of the half-heald 1, so that the end 18 of the guide slot 8 is exposed.

Claims (4)

1. Lifting heald (1), consisting of two limbs (2, 3) of different width, whilst each have at the end a fastening element (20, 31) for reception of a heald shaft, wherein means (9) for the magnetic control of a half heald (19) provided with two limbs (19b) are arranged at the wide limb (3) and wherein the wider limb (3) of the lifting heald (1) has an abutment for the half heald (19),
   characterised thereby that the limb (19b) of the half heald (19) abuts against the abutment (10) by its lower, free end.
2. Lifting heald according to claim 1, characterised thereby that the wide limb (3) of the lifting heald (1) has a guide slot (8) for the half heald (19), wherein the abutment (10) is arranged in the guide slot (8).
3. Lifting heald according to claim 2, characterised thereby that the spacing of the abutment (10) from the upper end of the guide slot (8) corresponds to the length of the limb (19b) of the half heald (19).
4. Lifting heald according to claim 2, characterised thereby that the width of the lower limb (3) in the region of the upper end of the guide slot (8) formed in this limb (3) is matched to the width of the limb (2) of the lifting heald (1), so that the end (18) of the guide slot (8) lies free.

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