JPH093744A - Apparatus for forming false-edge of gauge pitch by loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus designed to form gauze pitch interim edges on the respective sides of a textile fabric to be produced by a shuttleless loom. SOLUTION: In an apparatus designed to weave at least two side yarns 1, 2 by gauze pitch weave through moving transversely one party of warp 1 relative to the other party of warp 2 as a result of pulling culottes 10 into by two vertically movable heddles 5a, 5b, along with being subject to control independent of the moving means for warps forming textile fabric ground pattern, each of edge-forming apparatuses on both sides of the textile fabric has at least two heddles 5a, 5b each having a knit culot 10 capable of forming gauze weave, these heddles are set up in parallel with each other between two supports 7a, 8a, 7b, 8b which are actuated by alternate vertical motion yielded via a motor 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved device capable of forming a hem on a side edge of a fabric obtained by a "shuttleless" type loom, in which a weft thread to be inserted has a shed. After insertion in the mouth, the fabric is cut on at least one side.

[0002]

BACKGROUND OF THE INVENTION The most widely known method for forming a hem on a fabric obtained by a shuttleless loom today is a fixed number of fabrics located near the edge of the fabric by means of an armure pas de gaze. By weaving the thread, the weft thread ends on each side are tightened. In order to reinforce the edges during weaving, it has been proposed to add at least one set of threads by means of plain weave to the sides of the threads woven with gauze weaving, which plain weave part is cut after the fabric is formed. It had been.

[0003] The weaving method woven by "gauze pitch" is not only to move the warp yarn with respect to the weft yarn to join the weft yarn and the warp yarn with respect to the conventional warp yarn and the weft yarn, but also to use two warp yarns in the transverse direction. It means that one of the yarns called "winding yarn" alternately passes on both sides of the other yarn called "fixed yarn", so that the weft yarn is tightened and the weft yarn is It is fixed between these two threads that cannot slip.

Such "gauze" type weaves have been known for a long time, mainly not only for the warp threads to undergo a vertical movement to form the shed, but also for the weft to bond two warp threads to each other. It consists of adapting the loom so that it can also undergo directional movements.

In order to move two warp yarns in the lateral direction, a special heddle called a "gauze heddle" is used.
, Which comprises at least two vertically moving heddles cooperating with culottes guided by these heddles, said culottes being in turn drawn into one of the heddles. Has become.

Such devices are known to the person skilled in the art and are described, inter alia, in French Patent No. A2273893 and European Patent No. A344536, but the latter, inter alia, applying such gauze pitch technology to fabrics. It discloses making up a lip.

In the case of looms which are constructed so as to always produce the same product, the formation of the edges of the gauze pitch by this technique is okay, but on the contrary for looms with multiple functions, It is desirable that the lip forming device be independent of the frame of the loom.

For this reason, at present, an angularly adjustable cam system is used in mechanical connection with an edge forming device which is adjustable according to the type of product to be woven. This method is described in particular in French patent A2655359.

Such an edge forming device, which is independent of the means for forming the ground pattern of the woven fabric, minimizes the shed for the ground pattern and shifts the crossing of the hem yarns with respect to the ground pattern, and further, on the right side of the loom. And it has the advantage that you can shift the crossing of the hemline on the left side. Thus, for example, when intersecting a ground pattern that can be adjusted from a loom angle of approximately 305 ° to 345 °, the right edge can be adjusted at an average loom angle of approximately 305 ° and the left edge can be at an average loom angle of approximately 325 °. be able to.

The technical solution proposed today is to control the lip-forming parts by means of a cam, but the problem is that the width of the fabric to be produced cannot be easily changed on the loom. Alternatively, it is impossible to weave a plurality of cloth widths side by side with the same loom. Further, such cam control cannot control the adjustment of the loom by the microprocessor, and it is not possible to directly and automatically reproduce such adjustment from one loom to another.

[0011]

The object of the present invention is to propose a simple method which can solve all these problems.

[0012]

SUMMARY OF THE INVENTION In general, the present invention is directed to an improved apparatus for forming a temporary edge of gauze pitch on each side of a fabric produced on a shuttleless loom, one warp yarn relative to the other warp yarn. Culotte that can be displaced laterally
In a device which weaves at least two side threads by a gauze pitch weaving obtained through two vertically moving heddles that guide the fabric, and which is controlled independently of a warp moving means for forming a ground pattern of the textile. , The edge forming devices arranged on both sides of the fabric are each provided with at least two heddles for a mailles culotte capable of forming a gauze weave, said heddles being obtained via a motor It is characterized in that it is arranged in parallel between two supports which are actuated by the vertical movement of the.

Therefore, by arranging a device capable of forming one temporary edge of the gauze pitch on each side of the loom,
Single width fabrics can be formed on a loom, and likewise by placing such a device in the middle of the width of the loom, it is only necessary to cut between the central gauze woven areas.
It is also possible to consider obtaining a fabric of one cloth width.

According to a further embodiment, the device for forming each edge at the side edge of the loom comprises two sets of heddles forming a gauze weave, beside these heddles a plurality of sets forming a plain weave. The heddles are attached to the same support. This plain weave area is usually cut and discarded before winding,
Only the edges of the gauze pitch are left on both sides of the fabric.

The alternating up and down movements of the heddle are transmitted by any suitable means. According to one embodiment, the support of the heddle is supported by two parts of the endless belt which are displaced by a preset value in two opposite directions alternately via a stepper motor.

With such a control arrangement, the angle at which the yarns intersect can be easily adjusted independently at each edge, this adjustment having the same number as the other textile adjustments for one product type, It is programmed according to the product by the microprocessor.

Moreover, by means of these individual control devices,
It eliminates the mechanical transmission, wear and maintenance problems of the cam control system.

The control device can be easily adjusted according to the width of the product to be manufactured.

The invention and the features of the invention will become more apparent from the specific embodiments described below by way of example and not by way of limitation and the two accompanying drawings.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION With reference to the accompanying drawings, the present invention relates to a device for forming a lip (L) of the type shown in FIG. ) Are located on each side of the ground pattern (F) of the fabric (not shown in FIG. 1) and each include at least one set of warp yarns (1, 2) woven by a gauze weave; ) Is arranged beside the weft threads (5a, 5b ...) With a plain weave, preferably at least one set of threads (3, 4), which are cut after insertion into the shed.

In practice, very often, the hem is constructed to include two sets of warp yarns woven in gauze weave and two sets (or more) of warp yarns woven in plain weave, but these plain weaves The lateral areas of the are subsequently cut and discarded before winding the manufactured fabric.

The movement of the threads (1, 2, 3, 4) forming the lip is obtained, on the one hand, via a pair of heddles of the gauze type, as described in EP 344536. In addition, two vertically moving heddles (5a, 5a) that cooperate with the knit culott (10) that passes the fixing thread (2) inside.
b), so that the device not only forms a shed between the fixed thread (2) and the winding thread (1), but also allows the winding thread (1) to move laterally. Thread (1, 2,
The movement of the 3,4), on the other hand, is obtained by a conventional heddle (6a, 6b) which moves and controls with respect to the warp threads (3,4) forming a plain weave beside the edges of the gauze weave. , This central part is cut before winding the fabric.

According to the invention, the heddle (5a, 6a, 5
b, 6b) are common supports (7
a, 8a, 7b, 8b) mounted in parallel.

Therefore, the supports (7a, 8a, 7b, 8)
b) is two parts (9a, 9a) of the endless belt (9)
9b) and its alternating movement is obtained via a stepping motor (11) controlling a pinion (12), the belt (9) being a pinion (1).
Pass around 2).

With such a device, each lip is formed independently of the general control means for forming the ground pattern of the fabric.

Therefore, by controlling the motor (11) by the information means provided by the microprocessor including the fabric adjusting device for the product to be woven, the crossing of the hem yarns is shifted with respect to the crossing of the ground pattern yarns, and the left and right sides of the loom are also controlled. You can shift the crossing of the edge thread.

Such a device, which is very simple in design, can be mounted on any type of shuttleless loom, regardless of the width of the product to be woven.

[Brief description of drawings]

1 diagrammatically shows the structure of a lip formed by the device according to the invention, FIG.

FIG. 2 is a perspective view of a lip forming apparatus according to the present invention.

[Explanation of symbols]

 F Ground pattern L Temporary edge 1, Warp yarn 5a, 5b Vertical movement heddle 6a, 6b Heddle 7a, 8a, 7b, 8b Support 9 Endless belt 9a, 9b Part 10 Culotte 11 Motor (stepping motor)

Claims (3)

[Claims] 1. A device capable of forming a temporary edge (L) of gauze pitch on each side of a fabric produced by a shuttleless loom, wherein one warp yarn (1) is arranged with respect to the other warp yarn (2). At least two side threads (1, 2) are woven by a gauze pitch weave obtained through two vertically moving heddles (5a, 5b) which guide a laterally movable culotte (10). In a device that is controlled independently of the means for moving the warp yarns that form the ground pattern (F) of the fabric, each forming device that forms a hem on both sides of the fabric can realize a gauze weave (mailles). culotte)
For (10), at least two heddles (5a, 5a,
b), the heddle being mounted in parallel between two supports (7a, 8a, 7b, 8b) actuated by alternating up and down movements obtained via a motor (11) A device characterized by. 2. A support (7a, 5b) for the heddle (5a, 5b).
8a, 7b, 8b) are two parts (9a, 9) of the endless belt (9) which are alternately moved in two opposite directions via a stepping motor (11) by a preset value.
Claim 1 characterized in that it is supported by b).
The described device. 3. Each edge forming device comprises two sets of heddles (5a, 5b) capable of realizing a gauze weave and a plurality of sets of heddles (6a, 6b) capable of forming a plain weave, and the plain weave region is 3. Device according to claim 1 or 2, characterized in that, optionally, it is cut off before winding of the fabric produced.