JPS6160184B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a selvedge formation assisting device for a shuttleless loom.

Conventionally, several (about 6) yarn end catching yarns were provided on the side opposite to the weft inserting side of the warp yarns, and these yarns were opened and closed in the same way as the warp yarns, and while advancing, the tips of the weft yarns were woven in and the cut surplus yarns were weaved in. It is well known to eliminate the ends together with the end-capturing threads. A false twisting device is used to reliably capture the tip of the weft yarn, but attempts have been made to replace it by eliminating the false twisting device in order to reduce costs.

However, if the yarn end treatment method simply eliminates the false twisting device, there is a problem that the edges of the woven fabric cannot be formed properly. That is, in an air-jet loom or the like, the tension of the inserted weft yarn is small, and in particular, the tension is extremely small on the side opposite to the weft insertion because the force of the air flow is also weak. Since the catching force by the catching yarns is also small, the weft yarns at the ends of the woven fabric are bent more than usual by the warp rows, that is, the weft yarns are drawn into the warp yarns, and the amount of bending of the warp yarns is reduced, causing the central portion The threads become loose compared to the warp threads of the woven fabric, resulting in a decline in the quality of the woven fabric and a defective edge.
As mentioned above, the reason why the catching force by the catching yarn is small is considered to be because the weft yarn is bent greatly by the catching yarn, and the engaging force becomes loose, resulting in a small gripping force.

One method is known from Swiss Patent No. 514704. This attempts to strongly capture the tip of the weft yarn woven into the catching yarn by restricting the opening of the catching yarn to a small size with a tube, but in order to avoid interference with the reed, some means such as the tube is used to prevent interference with the reed. It is necessary to make sliding movements, etc., and as a result, the device becomes bulky.

In view of the fact that the above-mentioned problem is caused by insufficient force for capturing the weft yarn by the catching yarn, and furthermore, insufficient tension at the end of the weft yarn during selving (during reed beating), the present invention provides that the tip of the weft yarn is at least lower than the warp line during reed beating. A plate-shaped presser member is provided which is positioned below to engage with the captured yarn, and whose base end is supported by the loom body above the warp line, thereby increasing the tension at the weft end when the captured yarn is selvedged. By deviating the selvedge in such a manner, the ears can be reliably formed with a simple structure even when using a catching thread.

The present invention will be explained below based on illustrated embodiments.

In FIGS. 1 and 2, 1 is a warp, 2 is a reed, 3 is a front cloth, 4 is a woven fabric, 5 is a yarn end catching thread, 6 is a temple bar, and 7 is a temple bar 6 which is held together with a holder 8. and the temple base fixed to the temple bar 6, 9 is the temple roller, and 10 is the temple card.
It's a bar. This temple cover 10, which is a part of the loom main body, is used as a support, and the proximal end of the presser member 11 according to the present invention is fixed thereto with screws 12 above the warp line. This pressing member 11 is formed of a plate-shaped elastic body,
The fixing position can be changed by the elongated hole 11a.

The tip of the presser member 11 is placed on the catching thread 5 on the reed 2 side with respect to the extension line 3a of the cloth cover 3. Therefore, during the beating process, the reed 2 comes into contact with the tip of the presser member 11 and presses it down, thereby forcing the catching thread 5 downward. Note that the tip of the presser member may be brought into contact with the catching thread in advance.

Next, the action will be explained.

At the time of weft insertion, the catching thread 5 is also opened in the same way as the warp thread 1, but at this time, the upper thread is held by the presser member 11.
As for the bobbin thread, since the entire catching thread 5 is pushed down and is below the warp line, the weft thread will not be bent excessively even if it is pulled by the bobbin thread. . Then, after weft insertion is performed and the tip of the weft yarn enters the opening of the catching yarn 5, the reed 2 moves forward and beating is performed.

At this time, the reed 2 comes into contact with the presser member 11 when the catching thread 5 opens and is slightly reversed. Therefore, at this point, the end of the weft is pressed against the presser member 11.
Get under the . After this, as the reed 2 moves further forward, the presser member 11 is pushed further downward.
Along with this, the catching thread 5 is also moved downward. As the catching thread 5 moves, the ends of the weft threads caught by the catching thread 5 slide against the catching thread 5, so that the tension increases and the weft thread is firmly stretched. At this time, the selvage threads intersect and become stable afterward, resulting in the strongest selvage.

Note that the presser member 11 may have a notch 20 formed therein, as shown in FIG. 3, through which the catching thread 5 is passed, or as shown in FIG. A claw 21 may also be formed.

Furthermore, when moving the presser member with a reed,
The plate-shaped body constituting the holding member is formed of a rigid body, and its distal end is engaged with the catching thread, and its proximal end is rotatably pivoted to a support so that the distal end faces toward the reed. The catching thread may be biased by an elastic body so that the catching thread is bent while being pushed toward the woven fabric extension line side by the reed during reed beating. In this case, it goes without saying that the pressing member is composed of the plate-shaped body, its support mechanism, and the elastic body.

As explained above, according to the present invention, it is possible to obtain the effect that strong ear tissue can be obtained using the yarn end catching yarn while having a simple configuration.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a schematic side view of the same as the above, and FIGS. 3 and 4 are perspective views of main parts showing modified examples, respectively. 1... Warp, 2... Reed, 3... Orimae, 3a...
Extension line, 5... Yarn end catching thread, 10... Temple cover, 11... Pressing member. 〓〓〓〓〓

Claims (1)

[Claims] 1. In a shuttleless loom that performs beating and selvedge formation while the tips of the weft yarns are woven into a plurality of yarn end catching yarns arranged on the opposite side of the warp row to the weft insertion side, the tips of the weft yarns are at least on the warp line during beating. A selvedge of a shuttleless loom, characterized in that a plate-shaped presser member is provided which is located at a lower position to engage the yarn end catching yarn, and whose base end is supported by the loom body above the warp line. Formation aid.