DD276308A1 - WEAVING MACHINE FOR THE MANUFACTURE OF WOVEN FABRIC THREADS - Google Patents

Abstract

The aim and object of the invention is the production in the fabric wavy warp threads for the purpose of patterning to give mass-produced fabrics, especially on high-performance machines, with a simple bond without special pattern device a representative and valuable appearance. The object is achieved by virtue of the fact that a circular arc segment which is independent of the reciprocating movement of the sley receives a radial arc from a circular eccentric, which projects onto a scraper blade during the reciprocating movement of the sley via roller supports which roll on the circular arc segment. and a vertically displaceable to the batten support is transferred. Fig. 1

Description

For this 2 pages drawings

Field of application of the invention

The invention relates to a loom for the production of fabrics with corrugated warp threads by changing the number of warp threads per unit length during machine operation.

Characteristic of the known state of the art It is already known to produce fabrics with curvilinear warp threads. According to DDPS 2683, cl.86 will be added to this

used several consecutively arranged Rietblätter, which are laterally shifted from each other.

The disadvantage of this solution is that at the same time several reeds need to be moved and the sheet stop

can only be done by the front leaflet with larger gaps.

In DD-PS 174278, Kl.86g, 1 is "in Webeblatt for the production of fabrics with curvilinear warp threads

described, in which arranged in the same stop plane between groups of fixed Rietstäbe movable Rietstäbe, united in groups and alternately connected to each other. By lateral displacement of the same by means of threaded spindles can thus produce tissue parts in which the warp threads are serpentine.

The disadvantage of this invention is the inaccurate guidance of the movable reed bars and associated therewith

uneven tissue character ·. In addition, it can be caused by the displacement of the reed bars, which are perpendicular to the

Warp threads, thread breaks occur. From the literature, the Webmaster for mechanical weaving "(Franz Kraus, 1929) is a device for changing the Warp number per unit length is known, in which a Schrägrietblatt is used, which is fastened to two rails, with Rollers rest on eccentric. The eccentrics are mounted on a shaft which is slow by a ratchet and a pawl

is turned.

The disadvantage of this solution is the limited applicability for thinly set fabrics and the instability of the fabric Sheet drive and sheet guiding principle For high-performance weaving machines, where large dynamic forces on the reed

act, this solution is unsuitable. In addition, the entire control of the reed is mitgewogt in iodine sheet stop.

In EP-PS 0250044 Kl. D03 D, 13/00 a method is described, with the warp and weft threads from their rectangular Able to be deflected. The deflection of the threads takes place in a subsequent additional operation on a special Device and not during the weaving process. This solution is therefore not with the inventive solution

comparable.

Object of the invention

Dat The aim of the invention is to produce high-quality fabrics with simple fabric conditions that are produced inexpensively and without special shedding devices.

Explanation of the essence of the invention The invention has for its object to provide a device for the radial movement of the Schrägrietblattes, with the Movement of the oblique reed is transmitted to the warp surfaces and thereby change their lateral position. According to the invention the object is achieved in that the radially displaceable Schrägrietblatt coupled with circular segments

is that are moved via lifting torques of a drive element independent of the batten.

The radius of the circular arc segments corresponds to the distance to the pivot point of the central position of the blade stroke Batten. The coupling of the Schrägrietblattes with circular arc segments can form fit, such as roller supports,

or non-positively.

To increase the variety of patterns over the fabric width, the oblique rivet sheet can be divided into individual leaf segments and each

be controlled via the stroke oines arc segment.

By means of a control unit, the lifting movement of the Schrägrietblattes be varied, so that corresponding in the tissue Patterns are created by more or less curvilinear warp threads. To compensate for changing with respect to the circular arc radial displacement of the Schrägrietblattes Moment of inertia become one or more by coupling elements with the holder of the reed Mass pieces moved forcibly and in opposite directions to the direction of the Schrägrietblattes. The device according to the invention for weaving with a variable number of warp threads during the course of the machine is', for all Flachwebmaschinsn suitable. With it can be a large pattern variability, based on the curvilinear KeUladenverlauf

in the tissue, which is influenced by the design of the control unit and by the segmentation of the Schrägrietblattes.

The device is suitable for high performance looms, since the elements for the Huberteilung of Schrägrietblattes at the

reciprocating movement of the sley are not involved and despite radial lifting movement of Schrägiietblattes the

Maesenuegheltsmoment remains constant, so that angegeglichonedynamitr.he movement of the sley is guaranteed. Autführungtbeltplel The invention will be described below with reference to an embodiment. In the accompanying drawings show 1: the device for the radial displacement of a Schrägrietblattes, 2: the front view to Fig. 1, Fig. 3: a device for balancing the moment of inertia. Fig. 1 shows, starting from dor Ladenstelzenachse 1, the Ladenstelze 2 and the box section 3 of a loom the Guide plate 4 for guiding the holder 5. The guide can be a sliding or roller guide, an open or all-round

be closed guide, btztere is suitable for the transmission of the largest blade stop forces. In the exemplary embodiment, an open sliding guide is shown. At the upper part of the holder 5, the Schrägrietblatt 6 is attached. At the bottom of the

Holder 5 are roller supports 7 attached between which the runway of the circular arc segment 8 is located. The Circular arc segment 8 is moved by a push rod 9, which is mounted and rotatably at the lower end with the Eccentric rod 10 of the Kreisexzenters 11 is connected. For the movement of the Schrägrietblattes 6 are at least two Circular arc segments 8 and two circular eccentric 11 are arranged, which sit on a drive shaft 12 (Fig. 2). A drive and control unit 13 drives the drive shaft 12. Anstoile the Kreisexzenter 11 and the drive shaft 12 can

a crankshaft are used or there are cams used, which correspond to the fabric pattern

Shapes have. The Schriigrictblatt 6 may consist of several leaf segments, each segment a Circular eccentric 11 is assigned for the drive, sitting on the common drive shaft 12, wherein they are in position

are twisted to each other and can have different stroke sizes.

The drive and control unit 13 is to be designed according to the weft size of the pattern repeat. In the simplest case

For example, the pattern repeat may have been adjusted by gears that are replaceable according to the gear ratio.

By means of step gears, a high variability of the pattern apportes can be achieved. Von.der control unit 13 is via the drive shaft 12 and the circular eccentric 11 with the eccentric rod 10 with this

articulated push rod 9 moves. Bewepunp the push rod 9 causes a lifting or lowering dos

Xreisbogensegmentos 8, whereby the Schrägrietblatt 6 via the positive Rollenstützon 7 radially to Webladenbewegung

is moved. This displacement of the Schrägrietblattes 6 forced by the deflected at a certain angle from its vertical position Rietstäbe 6a, that the Kuttfäden be verschooon laterally. By means of the control unit 13, the

Drive element are controlled so that the speed of the stroke movement varies odor that the movement temporarily

can be gettoppt.

By designing the Kreisbogonsogmente? 8 ensures that the Schrägrietblatt 6 at any time and

irrespective of the current leaf stroke describes a Kroisbogonbahn corresponding to the Ltidonbewegung.

The achieved by this Schrägrietblattbewegung effect can be driven separately by additional movement Schrägrietblattsegmente be further changed, with only individual segments are bowegt whose Rietstäbe under a

certain angles are deflected from their vertical position.

Due to the displacement of the oblique rivet blade 6, it is necessary to use a compensating device, i. H. to keep constant

of the moment of inertia so that the dynamic Laufverhaltaton the wobbler is not affected.

An example of such a device show Fig. 3, in which in the box section 3 eino axis 14 is mounted, at the one

two-sided fixed lever 15 is located. One side of the lever 15 has a boss 16, which engages in the groove of the holder 5.

The other side of the lever 15 carries a mass piece 17, the opposite movement to the Schrägrietblatt 6 with the Holder 5 executes, whereby a balance of the mass moment of inertia is achieved.

Claims (5)

1. Weaving machine for the production of fabrics with wavy warp threads by changing the warp count per unit length during the machine run, characterized in that the oblique rivet blade (6) is coupled to circular segments (8), which via lifting elements (11) by a drive element (12) be moved independently of the batten (2). 2. Weaving machine according to claim 1, characterized in that the radius of the circular arc segments (8) corresponds to the center position of the reed at the distance to the pivot point (1) of the sley (2). 3. Weaving machine according to claim 1 and 2, characterized in that the Schrägrietblatt (6) ir> individual segments is divided, each segment can be moved individually by a respective circular arc segment (8) and the corresponding lifting elements. 4. loom according to claim 1 to 3, characterized in that the size of the lifting movement of the Schrägrietbiattes (6) and the speed of the lifting movement or an intermittent lifting movement by a control unit (13) can be made variable. 5. Weaving machine according to claim 1 to 4, characterized in that by the coupling of elements (14,15,16) with the holder (5) of the Schrägrietblattes (6) one or more masses (17) forcibly and in opposite directions to the direction of displacement Schrägrietblattes (6) are moved.