EP1020549B1 - Weft yarn retaining device for a multiphase loom and multiphase loom with such a device - Google Patents

Description

The invention relates to an arrangement for holding a weft thread for a row shed loom and row shed loom with one such arrangement.

Such an arrangement is known from WO 96/38613. This Arrangement contains two holding elements, which are at least in sections are arranged overlapping stationary, at least two ring-shaped Conveying elements that are parallel to each other and spaced on both sides of the Holding arrangement and are arranged to be movable relative to this transverse to the direction of movement of the conveyor elements and transverse to the Holding elements running weft thread between the holding elements slide and a stretching nozzle to close the weft in the weft direction tighten.

The rigid assignment of the holding elements and the conveying elements with each other or with each other proves to be disadvantageous because it creates a Holding force is specified, which requires no great effort for the application cannot be changed by different weft yarns. In addition, the Tricky attitude.

The invention has for its object an arrangement for holding to improve a weft thread, and adjusting the clamp too simplify.

This object is achieved according to the invention with the features of claim 1 solved.

The advantage that can be achieved with the invention is the simplified adjustability to see the clamping force.

The invention will now be described with reference to the accompanying drawings explained.

Fig. 1

Eine Ausführung einer erfindungsgemässen Anordnung in räumlicher und auseinandergezogener Darstellung;

Fig. 2

einen Schnitt entlang der Ebene II-II in Fig. 1;

Fig. 3

eine Ansicht der Klemmfläche und

Fig. 4

eine Draufsicht auf einen Teil der Fig. 1.

Show it:

Fig. 1

An embodiment of an arrangement according to the invention in a spatial and exploded view;

Fig. 2

a section along the plane II-II in Fig. 1;

Fig. 3

a view of the clamping surface and

Fig. 4

2 shows a plan view of part of FIG. 1.

Fig. 1 shows a weaving rotor 1, the shedding elements 2 with means to from warp threads 3 to form the shed and with an opening for Shooting through weft threads 4 and 5 stop elements to the Striking weft threads against the fabric edge has one Fabric table 6, which cooperates with the stop elements, one Spreader 7 for the fabric and an embodiment of an arrangement 8 for Holding weft threads 4, which is arranged outside the weaving width. The arrangement 8 comprises a holding device 11 for the weft thread, two Conveying elements 12, 13 to the weft in the holding device introduce and means 14 to tension the weft. The Holding device 11 contains a thread clamp 15 and an assembly 16. The thread clamp 15 contains a fixed clamping part 17 and one movable clamping part 18. The fixed clamping part 17 is on a Fabric table 6 supported and via a spring 19 with the assembly 16th connected. The movable clamping part 18 is on the assembly 16 arranged. The assembly 16 is in the direction of the double arrow A. movable to the position of the assembly with respect to the weaving rotor 1 more specifically, stop when the width of the web changes. At a Weaving width reduction, the fabric support does not have to be cut to length.

The assembly 16 comprises a carrier 21, a lever 22 which is attached to a End is mounted on the carrier 21 and with a pin 23 and with a Adjustment member 24 is provided for the movable clamping member 18 and that movable clamping part 18 connects to the lever 22, a leaf spring 25, the on the one hand attached to the carrier 21 and on the other hand rests on the pin 23 and a torsion spring 26, which is a portion of the adjuster 24 encloses and on the one hand on the lever 22 and on the other hand on the movable Clamping part 18 is attached.

As shown in FIG. 2, the fixed and the movable clamping part form 17, 18 a clamping gap 27. As already mentioned, the torsion spring 26 connected to an adjusting member 24 which is rotatably arranged in the lever 22 is. With this setting member 24, the spring force can be changed, so that the clamping gap 27 converges more or less. So that is achieved that on the one hand the clamping force on the inlet side is less strong and the weft threads are clamped with increasing depth of penetration and consequently be kept better.

The conveyor elements 12 and 13 are annular disks which are parallel and in Distance to each other can be connected to the weaving rotor 1 so that the free End of the thread clamp 15 is arranged between the conveyor elements namely in the area of the edge of the weaving rotor. In this border area are the conveyor elements 12 and 13 each with recesses 31, 32 formed (Fig. 1), the number of which corresponds to the number of shot channels. The recess 32 differs from the recess 31 in that that a hook-shaped section 33 is present. This serves for Pulling out the weft thread from the device 14.

3 shows, the clamping surfaces of the thread clamp with grooves 28 provided that so obliquely with respect to the career of the weft threads 4 are arranged that the weft threads inserted into the clamp in Shot direction received a stretch effect.

4, which shows the assignment of the arrangement 8 to the web rotor 1 and the components of the arrangement to each other. The Device 14 for catching and tensioning the weft thread 4 consists of a nozzle 41 with e.g. three outputs and three holding elements 42 and one Slat 43, which consists of resilient material. The device 14 is like this arranged that the lamella 43 bears against the conveying element 13 in a prestressed manner.

The function of the arrangement is described below with reference to FIGS. 1 and 4 described, wherein a weft thread is shown in different positions is.

In position a, the weft thread 4 is subsequently through the recess 31, 32 of the conveying elements 12, 13 conveyed.

In position b the weft thread has passed the conveying elements and will held and tensioned by means of the device 14.

In position c, the weft thread is in the Clamping gap of the thread clamp inserted and the weft end is out the nozzle 41 pulled out and between the conveying element 13 and Slat 43 held.

In position d, the one already clamped by the warp threads 3 Weft moved to fabric table 6. This is the weft pushed through the clamping gap 27, the weft thread by means of oblique grooves in the clamping surfaces is additionally tensioned.

The arrangement comprises a holding device 11 for the weft thread, two Conveying elements 12, 13, which are arranged on both sides of the holding device and are movable relative to the holding device to the transverse to the holding device and transverse to the direction of movement of the conveyor elements Introduce weft into the holding device and also a device 14 to catch and tension the weft. The holding device comprises a thread clamp 15 with a fixed clamping part 17 and a spring-loaded, movable clamping part 18, the one Form clamping gap 27, the weft thread by means of the conveying elements 12, 13 and the device 14 held in the extended position and transversely to the Clamping gap is displaceable.

The thread clamp can advantageously be the required Clamping force can be set.

Claims (9)

1. Arrangement for the holding of a weft thread for a series shed weaving machine, which arrangement (8) has a holding device (11) for the weft thread (4), has forwarding elements (12, 13) which are arranged on both sides of the holding device and are movable relative to the holding device in order to introduce the weft thread which extends transversely to the holding device and transversely to the direction of movement of the forwarding elements into the holding device and has a device (14) to tension the weft thread , characterised in that the holding device (11) contains a thread clamp (5) with a fixed clamping part (17) and a movable clamping part (18) subjected to spring action which form a clamping gap (27), with the weft thread being held in the longitudinal direction and being displaceable transversely thereto through the clamping gap.
2. Arrangement in accordance with claim 1, characterised by a first spring element (25) which biases the movable clamping part (18) towards the fixed clamping part (17) and by a second spring element (26) which imparts a torque to the movable clamping part (18) in order to produce an elastic clamping force which continuously increases in the clamping gap starting from the inlet section.
3. Arrangement in accordance with claim 1or claim 2, characterised in that the clamping parts have elongate clamping surfaces and in that the clamping surfaces are provided with grooves (28) which are obliquely arranged in the longitudinal extent of the clamping surface.
4. Arrangement in accordance with one of the claims 1 to 3, characterised in that a first and a second forwarding element (12, 13) are provided.
5. Arrangement in accordance with one of the claims 1 to 3, characterised in that the forwarding elements are formed as ring-like discs (12, 13).
6. Arrangement in accordance with one of the claims 1 to 4, characterised in that the forwarding elements (12, 13) are provided in the outer marginal portion with at least one cut-out (31, 32) to accommodate the weft thread (4).
7. Arrangement in accordance with claim 1 or claim 5, characterised in that the forwarding element (13) which follows the thread clamp (5) in the weft direction has a hook-like section (33).
8. Arrangement in accordance with one of the claims 1 to 6, characterised by a hold-back element (43) of resilient material which contacts the second forwarding element (13) under bias.
9. Series shed weaving machine having a weaving rotor (1) which has shed-forming elements forming weft passages and beat-up elements, with a cloth table (6) which is arranged in parallel with respect to the weaving rotor and which is intended to lead away the cloth which runs away from the weaving rotor and with an arrangement in accordance with one of the claims 1 to 7, characterised in that the holding device (11) is adjustably arranged parallel to the weaving rotor axis and is supported on the cloth table (6).

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