JPH0351808B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention provides a method for weaving two plastic filament yarns simultaneously in opposite orientations around a cantilevered capture mandrel in a weaving position to form a connected row of fastener elements. Hanging and intertwining with the warp threads in a threading motion, during which both plastic filament threads are each inserted as double weft threads into the thread halves at the same height by means of plastic filament weft needles and at the same height in the weaving direction. The ends of the capture mandrels that are located in front and that move up and down are connected to each plastic filament 2.
Pass between the two legs of the heavy weft threads, inserting the preceding support belt base weft threads together with the plastic filament threads in another warp thread and entwining them with the warp threads, passing these support belt base weft threads into this warp thread. The weaving needle is guided through the weft thread guide device in the central area of the width of the weft thread guide device and inserted by a base weft thread needle having an open thread receiving notch and a deflection projection in the region between the weft thread guide device and the weaving position. The present invention relates to an apparatus for producing a fastener belt having an array of plastic filament fastener elements and a textile support belt.

The inverted loops of the supporting belt base weft in the weaving position can then be crocheted into the edge of the fabric. Within the scope of the present invention, a fastener belt is an endlessly woven belt with a row of fastener elements and a fabric support belt, by means of which it is possible to cut to length, attach a starting end and an end end, and attach a slider. A fastener is made by attaching the .

PRIOR TECHNOLOGY In the above-mentioned known procedures (German Patent Application No. 27 07 946, German Patent Application No. 30 31 654), a base weft thread needle having a thread-receiving notch at its tip is used. used. The turning protrusion should rather be called a retraction,
Used to ensure that the correct warp yarns are inserted into the yarn receiving notches. The thread receiving notch and the notch bottom are in the plane of motion of the base weft needle. Therefore, if an interfering warp thread enters the movement path of the base weft thread, it can collide with the warp thread during insertion of the support belt base weft thread. These defective warp yarns may be entrained in the yarn receiving notch. Obstructed warp yarns are, for example, those that have fallen down into the path of movement of the base weft needles or that have prevented a smooth changeover. Entrainment of faulty warp yarns results in serious weaving errors.

Object of the invention The object of the invention is to improve a device of the type mentioned at the outset in order to ensure that the faulty warp threads are no longer entrained by the base weft needles and thereby to increase the length of the fastener belt that can be woven without errors. It's about doing.

Structure of the Invention In order to solve this problem, the present invention shows the following. That is, the support belt base weft thread is bent by the deflection projection in the weft thread guide device and moved into a thread receiving notch which follows the deflection projection in the direction of movement of the base weft needle and is directed towards the diverted support belt base weft thread, and the base weft thread is Any interfering warp threads that have entered the path of movement of the needles are passed through the thread receiving notch by means of correspondingly formed deflection projections.

According to the invention, the base weft threads are turned by the base weft needle, and the direction of the thread path differs significantly from that of the warp threads. This is done by means of deflection projections. The yarn receiving notch is recessed and adapted to receive the turned base weft yarn. The obstructed warp threads are, as it were, repelled by the deflection projection, pass through the thread-receiving notch, and are no longer carried away. This is easily achieved by means of a device as will be explained in more detail below with reference to the drawings which show exemplary embodiments.

Description of examples Embodiments of the present invention will be described below with reference to the drawings.

The illustrated device according to the invention will be described first in terms of basic structure and later in operation.

The illustrated device includes a thread forming mechanism, a simultaneously operable weft thread insertion device 2 arranged on both sides of the thread 1.
and a weaving machine with a catch mandrel 5 arranged in the center of the threadway 1, the catch mandrel being located in front of the weaving station 3 and movable up and down in a mandrel holder 4.
Supported by

The weft thread insertion device 2 has a plastic filament weft needle 6 for inserting and removing the plastic filament thread 7 for the fastener element row 8 and an additional base weft needle 9 for simultaneously inserting the support belt base weft thread 10. In the weaving direction, in front of the pick-up mandrel 5 and in the center of the thread, a guide device 11 is provided for the support belt base weft thread 10, which is fed into the weaving position 3 approximately in the weaving direction. Base weft needle 9 corresponding to support belt base weft 10
has a thread receiving notch 12 which is open in the area of its free end.

Specifically, the following will be described regarding the configuration of the device and the weaving process regarding its operation.
The thread forming mechanism forms a thread thread 1 and another warp thread thread 13 consisting of warp threads 14. The threads 1 are formed by warp threads 15 for the connection of the fastener element rows 8. These warp yarns 15 alternate between a high position and a low position. Another warp thread path 1
3 are formed by warp threads 14 for the support belt section 16 which are aligned with the row of fastener elements 8, these warp threads 14 alternating between a single low position and a single mid position. As is clear from Figure 4, Hido 1
is centered between the two halves of the further warp thread 13 in plan view. The weaving position 3 is at the beginning of a fastener guide with a thermosetting device (not shown).

On both sides of the thread channel 1 and the further warp thread channel 13, the previously described swingable weft thread insertion devices 2 are arranged in each case. Both weft thread insertion devices 2, which can be operated simultaneously, first have a plastic filament weft needle 6 for inserting a plastic filament thread, each of which is fed from the same outside. The plastic filament weft thread needle 6 therefore has a closed thread guide hole 17. Both other weft thread insertion devices 2 have base weft needles 9 which simultaneously insert the preceding support belt base weft thread 10. Since these support belt base weft threads 10 are not inserted from the outside into the further warp threads 13, these base weft needles 9 have the already described open thread receiving notches 12 in the region of their free ends; These thread receiving notches are clearly visible in the enlarged detail of FIG. All the weft thread needles 6, 9 of the weft thread insertion device 2 are arranged in superimposed horizontal planes, so that there is no interlocking of the weft thread needles during insertion.
At this time, the plastic filament weft needle 6
It enters the thread 1 above the further warp thread 13, and the base weft needle 9 enters the further warp thread 13. The support belt base weft threads 10 are fed approximately in the weaving direction, ie like warp threads, to the weaving position 3 between the warp threads 15 in order to be entwined with the two rows of fastener elements 8, and are fed via a guide device 11, which The device is arranged in the center of the thread channel 1 between the intruding weft thread needle of the weft thread insertion device 2 and the thread forming mechanism.

The initially mentioned capture mandrel 5 is bendable;
and is located in the center of the threadway 1 in front of the weaving position 3 and after the guide device 11 as seen in the weaving direction, and is located at the end remote from the weaving position 3 within the mandrel holder 4 which is movable up and down. is movable. On the other hand, the mandrel holder 4 is cantilevered on the guide 18 and can be moved from the high position to the single track by means of a tappet device 19 together with an additional holding device (not shown, for example a magnet or the shaft of a channel-forming mechanism). Movable between low positions. The guide 18 is cut away in the middle in order to allow deflection of the catching mandrel 5 by the plastic filament thread 7 when the mandrel holder 4 is in the high or low position. In order to avoid drawing too much together, spacers 20 are provided on both sides of the mandrel holder 4 for the warp threads 15 present here.

In this embodiment, a crochet device 22 is provided in the area of the weaving position 3 outside the further warp thread 13, alongside the fastener guide 21, so that the reversal loops 23 of the supporting belt base weft threads 10 are crocheted. can be used at the edges of the organization. After the thread movement, the reeling of the weft threads 7, 10 in the form of a double weft is carried out using reeling.

As is clear from a comparative examination of the figures, the tip of the base weft thread 9 has a deflection projection 24 for the support belt base weft thread 10 to be accommodated. Turning protrusion 24
A thread receiving notch 12 following the thread receiving notch 12 is provided in the path of the turned supporting belt base weft thread 10. Regarding the turning of the support belt base weft thread 10, FIG. 4 is especially helpful.
0 is shown by a solid line for a non-turning state and a broken line for a turned state. These threads are, so to speak, bent.

Figures 1, 2 and 3 show the faulty warp threads.
Kfs is shown. As is clear from FIG. 3, the turned base weft yarn 10 reliably enters the yarn receiving notch 12 corresponding to this turning, while the obstructed warp yarn Kfs is pushed away by the turning protrusion 24.
Moreover, it is not taken to the thread receiving notch 12. In FIG. 1, the tip region of the base weft needle 9 on the left side is shown cut away in order to clearly show the important measures of the invention on the right side. For the same reason, the third
Only the base weft needle 9 is shown in the figure. The base weft needle 9 at the lower left in FIG. 1 is not shown.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a part of the device according to the present invention, FIG. 2 is an enlarged view of part A of the device in FIG. 1, and FIG. 3 is a perspective view of the device in FIG. Figure, 4th
The figure is a side view of the apparatus of FIG. 1. DESCRIPTION OF SYMBOLS 1... Hi-way, 2... Weft thread insertion device, 3... Weaving position, 4... Mandrel holder, 5... Capture mandrel, 6
...Plastic filament weft needle, 7...
Plastic filament yarn, 8... Fastener element row, 9... Base weft needle, 10... Support belt base weft, 11... Guide device, 12... Yarn storage notch, 13... Warp thread path, 14, 15...
...Warp yarn, 16...Support belt portion, 24...Turning protrusion.

Claims (1)

[Scope of Claims] 1. A thread forming mechanism, a weft thread insertion device arranged on both sides of the thread thread and operable at the same time, and a weft thread insertion device whose end in front of the weaving position is supported by a mandrel holder that is movable up and down. It consists of a loom with a catch mandrel arranged in the middle of the track, with a weft thread insertion device inserting and removing the plastic filament weft thread for the fastener element row, and an additional weft thread for simultaneously inserting the support belt base weft thread. a support belt having a base weft needle, in front of the catching mandrel in the weaving direction and in the middle of the thread, a guide device for the support belt base weft, which is fed into the weaving position approximately in the weaving direction, and a support In an apparatus for producing a fastener belt with a row of fastener elements made of plastic filament and a fabric support belt by weaving, the base weft needle corresponding to the base weft thread has a thread receiving notch and a deflection projection open in the area of its free end, The deflection projection 24 of the weft thread needle 9 has, seen in the direction of movement of the base weft thread insertion, a wedge-shaped profile with a deflection wedge surface, and the thread receiving notch 12 adjoining the deflection projection 24 serves as a guide for the deflected support belt base weft thread 10. If the warp thread Kfs is aligned with the path of
If the deflection projection 24 allows the yarn to pass through the thread receiving notch 12 and the width of the deflection projection 24 of the base weft thread needle 9 is projected onto the movement plane of the base weft thread needle 9, then
To manufacture a fastener belt by weaving, which is approximately half the width of the needle and is characterized in that the bottom surface of the thread storage notch 12 following this extends obliquely to the movement plane of the base weft needle 9. Device. 2. The device according to claim 1, wherein the deflection projection 24 of the base weft thread needle 9 and the thread receiving notch 12 are smoothed by polishing.