JPS63780Y2 - - Google Patents

Description

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

In shuttleless looms, the weft yarns that are driven each time are not continuous and are cut each time they are driven, resulting in fraying of the edges of the woven fabric (both the weft insertion side and the non-weft insertion side). do. In order to prevent this, the selvage threads are placed outside the warp rows, and the ends of the weft threads that have been driven are removed using a planetary gear type selvage assembly device as disclosed in, for example, Japanese Utility Model Publication No. 18767/1983. By twisting them together, they form curly ears.

By the way, FIG. 1 shows the arrangement of selvage threads in a conventional loom. In the figure, 1 is a reed, 2 is a reed feather,
3 is the warp, 4 is the fabric, 5 is the woven fabric, and the selvage thread 6
(Although it is shown as one line in the figure, there are two.) is guided from a position away from the three rows of upper warp threads arranged in the selvedge assembly device, and the reed space 7 (which is the same as the outermost warp thread 3) between the reed feathers 2a and 2b).

However, although the selvedge threads 6 are located in the same reed space 7 as the outermost warp threads 3, they tend to bend the reed threads 2a to the left in the figure and move away from the warp threads 3. On the other hand, the warp yarns 3 cause the reed feathers 2b to bend to the right in the figure due to the shrinkage of the warp yarns on the front 4 side, and this also tends to separate from the selvage yarns 6. Therefore, the reed space 7 itself is also wider than a normal space.

For this reason, the selvage threads grip the weft yarns at a distance from the outermost warp threads, resulting in a problem that the selvage threads cannot be formed firmly. This is thought to be because when the selvage thread grips the weft at a distance from the outermost warp, the warp shifts laterally by the distance due to weaving shrinkage, etc., and this causes the warp density to decrease. This is because the ears become uneven and the formation of the ears is poor.

Furthermore, the opening and closing timing of the selvage thread is generally as shown in FIG. In other words, the selvage threads on the weft insertion side open and close approximately 60 degrees ahead of the warp threads.

Considering this situation, when the selvage thread on the weft insertion side grips the weft thread, the reed is still in the forward movement, so the reed wing space becomes wide as described above, and the selvage thread and the outermost If the warp yarns are separated from each other, the selvage is performed in this separated state, and the selvage tissue, especially on the weft insertion side, cannot be formed sufficiently firmly.

The present invention was developed with the aim of solving such problems, and by providing an engaging body that moves together with the reed and engages with the selvage threads to bring the selvage threads closer to or in contact with the warp rows, The selvage threads grip the weft threads in close contact with the outermost warp threads, thereby making it possible to firmly form the selvage threads.

The present invention will be explained below based on the drawings.

3 and 4 show an embodiment of the present invention. Note that the same parts as in FIG. 1 are given the same reference numerals.

Reference numeral 10 denotes an extruder for cutting the weft yarn, which is fixed to the front end of the reed 1. That is, the upper end of the extruder 10 is inserted into the groove 11a of the holder 11, which has a U-shaped cross section and is placed over the upper frame 1a of the reed 1, and is fixed with bolts 12, and the lower end is held together with the lower frame 1b of the reed 1. Insert the bolt (not shown) into the groove 13a of the body 13.
It is fixed at The middle part of the extruder 10 is a reed blade 2
The extruded pieces 10a and 10b are formed by bending both end edges of the front side of the front side of the holder forward. And these extruded pieces 10a, 10b
protrudes forward from the cloth front 4 during beating, and at this time, the cutting surface 1 of the thermal cutter 14 placed on the cloth front 4 side
4a is arranged to enter between the extruded pieces 10a and 10b. Incidentally, at the tips of the extruded pieces 10a, 10, there is a covering 1 made of a wear-resistant material and having a U-shaped cross section.
5a and 15b are covered and fixed with adhesive or the like.

Here, as a configuration according to the present invention, the warp 3 is attached to the cover 15b attached to the inner extruded piece 10b.
An engaging body 16 that protrudes toward the row side is integrally formed. This engaging body 16 has a substantially linear engaging portion 16a that engages the selvedge threads 6 and the warp threads 3 toward the center of the three rows of warp threads from the middle of the beating process.
and a guide portion 16 located above and below and having an inclination.
b, 16c.

Next, the action will be explained.

When the reed 1 moves forward, the engaging portion 16a of the engaging body 16 engages with the closing selvage threads 6 and the warp threads 3 from about 240 degrees in FIG. Thread 6
and press the warp threads 3 toward the center of the three rows of warp threads (Fig. 4).

As a result, the selvage threads 6 intersect with the outermost warp threads 3 while approaching or contacting them. In other words, selvage thread 6
is in close contact with the outermost warp thread 3 when capturing the weft thread. Therefore, strong ear tissue can be formed.

Other embodiments are shown in FIGS. 5 and 6.

In this embodiment, the engaging body 20 is fixed at the rear side of the reed 1, and the selvage threads 6 and the outermost warp threads 3 are passed through the engaging part 20a whose end edge is bent forward. The reed blade 2a is engaged with the outer reed blade 2a forming the reed blade space 7, and the reed blade 2a is bent toward the inner reed blade 2b. Therefore, the engaging body 20 bends the reed feathers 2a to engage with the selvage threads 6 via the reed wings 2b, thereby bringing the selvage threads 6 close to or in contact with the three rows of warp threads. In this way, the reed space 7
Even if it is made narrower, the selvage threads 6 and the outermost warp threads 3 come close to each other or come into contact with each other, so that a strong selvage tissue can be formed. Note that this engaging body 20 has an upper end connected to a holder 21.
It is fixed to the upper frame of the reed 1, and its lower end is fixed to the reed holder together with the lower frame of the reed 1.

As explained above, according to the present invention, since an engaging body is provided that moves together with the reed and engages with the selvage threads to bring the selvage threads closer to or in contact with the warp rows,
The selvage threads can capture the weft threads in a state close to the warp rows, and this has the effect of forming a strong selvage tissue.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the conventional arrangement of the selvage threads, Fig. 2 is a diagram showing the opening and closing timing of the selvage threads, Fig. 3 is a perspective view showing an embodiment of the present invention, and Fig. 4 is the same as above. FIG. 5 is a front view showing another embodiment, and FIG. 6 is a plan cross-sectional view of the same. 1... Reed, 2, 2a, 2b... Reed feather, 3... Warp, 6... Edge thread, 10... Extruder, 16, 20
...Engagement body.

Claims (1)

[Scope of utility model registration request] In a shuttleless loom in which the selvage threads 6 are arranged outside the third row of warp threads to form a twisted selvage, the selvage threads move together with the reed 1, engage with the selvage threads 6, and bring the selvage threads closer to the third row of warp threads. Alternatively, there is provided a selvage forming auxiliary device for a shuttleless loom, characterized in that engaging bodies 16 and 20 are brought into contact with each other.