JPS5938336B2 - Device to prevent splitting of weft ends in fragment looms - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing splitting of weft ends in a fragmentary loom, and more particularly to a device that prevents splitting by moistening the tips of weft threads.

In fragment looms that use fluid, especially air jets, to fly the weft threads and perform weft insertion, the operation of cutting the weft threads is carried out using a mechanical cutter such as a knife or scissor type, so the weft threads are made of lightly twisted multifilament. When thread is used, it is common for the cut portion to unravel (split) and become wider at the end.

This separated cut part will become the tip of the weft yarn in the next weft insertion, and the air flow jetted from the weft insertion nozzle will cause the splitting to progress further, causing tangles at the tip, or causing tangles on the woven fabric. It often left behind flaws such as pilling.

On the other hand, the following methods can be used to prevent the weft from splitting.

One method is to wet the tip with water and further freeze it, and the other method is to wet the weft tip with water and further freeze it, and the other method is to wet the weft tip with water and freeze it. It is a means of moistening the area.

However, the purpose of both of these methods is to stabilize the flight by increasing the weight of the leading end of the weft, and for this purpose, the leading end or leading end of the weft is soaked with a relatively large amount of water. In the former case, this water penetrates into the woven fabric after the ice melts, and in the latter case, the tip is not substantially wetted, so it is not effective in preventing fiber splitting at the tip, and the wet weft threads are woven. It has disadvantages such as being woven into cloth, and furthermore, the equipment for carrying out both of these methods is complicated and expensive.

Furthermore, as in Utility Model Publication No. 39-7175, there is a method in which a fixed porous moisture absorbing piece is placed on the weft insertion side of the cutter, and the weft is brought into contact with this moisture absorbing piece during beating. With this configuration, the contact time between the weft yarn and the moisture supply piece is only a short time during beating, so as weaving machines operate at higher speeds in recent years, sufficient heat supply cannot be achieved. It has the following drawback.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fiber splitting prevention device that is simple and inexpensive to manufacture, capable of preventing fiber splitting occurring at the tip of a weft and its progress, and as a weft wetting means that can reliably wet the weft even at high speeds. .

In order to achieve this object, the weft wetting means of the present invention is a moisture-containing means provided between the cutter for cutting the weft yarn on the weft insertion side and the weft insertion nozzle, and at a part that swings together with the reed. It is equipped with a Minamata material having a function and a means for supplying water to the Minamata material, and is used to reed the leading part of the weft, which is located between the cutter and the weft inserting nozzle and is essentially the leading edge during flight. It is characterized in that it is brought into contact with the Minamata material from the time it is advanced until it is cut, and this small forward portion is kept wet for a relatively long period of time.

Hereinafter, the fiber splitting prevention device of the present invention will be explained in detail based on examples.

FIG. 1 is a perspective view showing an embodiment of the fiber splitting prevention device of the present invention.

In the figure, 1 is a reed, and 2 is the scissor-type cutter that moves immediately after weft insertion to cut the weft threads, and these are known.

3 is a Minamata material that has a water-containing function, such as a sponge;
This sponge 3 is fixed to the side frame 4 of the reed 1 immediately to the side of the cutter 2, and 5 is a water pipe for supplying water to the sponge 3, and a nozzle 6 is attached to the tip.

This water pipe 5 is arranged above the reed 1 so as not to interfere with the reed beating movement, and the nozzle 6 is oriented so as to face the sponge 3 when the reed 1 is in a predetermined position.

Each time the reed 1 comes to the predetermined position, or every several times, a predetermined amount of water is sent from a pump or valve (not shown) that operates in conjunction with the loom, and from the nozzle 6 as shown by the broken line 7. It is designed to be sprayed onto sponge 3.

This predetermined amount is an amount that prevents water from scattering from the sponge 3 due to the reciprocating movement of the reed 1 and that keeps the weft ends sufficiently moist at all times.

It is convenient to set the injection cycle so that each injection from the nozzle 6 is about 0.2 cc.

Note that 21 indicates a weft insertion nozzle, and 22 indicates a weft immediately after flying by air injection.

In the splitting prevention device configured as described above, when the weft yarn 22 flies straight from the weft insertion nozzle 21 as shown by the two-dot chain line, the reed 1 moves from the position shown by the two-dot chain line to the position shown by the solid line, that is, from the position shown by the arrow The weft 22 is rotated as shown by 8 and pushed out as shown by the reference numeral 22', and each time the reed 1 moves forward, the weft 22' near the cutter 2 comes into contact with the sponge 3, and the tip of the weft that comes into contact is compared. The target area is moistened by the water contained in the sponge 3.

When the reed 1 moves backward again in the direction opposite to the arrow 8 after beating the reed (solid line position), the weft is cut by the cutter 2.

The contact between the weft yarn 22 and the sponge 3 starts midway through the forward movement of the reed (starts from an extension of the axis of the weft insertion nozzle 21) and continues until cutting by the cutter 21, so the weft yarn 22 is kept relatively moist. It takes a long time.

The wetted portion of the weft yarn is the portion that will essentially become the leading end when the weft is inserted next time.

Since the predetermined portion of the weft thread that has been moistened in this way is cut by the cutter 2, the cutting function is not impaired, and since the weft thread is moistened near the cut point, this water can be removed. G) The degree of fiber splitting is extremely small due to its viscosity.

When the weft yarn whose tip is moistened is inserted next time, the impregnated moisture will penetrate to the tip slightly in front of the weft yarn, so that the progress of splitting can be suppressed even during flying.
No tangling or clumping of the tip.

In addition, the wet part of the weft tip that has flown to the opposite side of the weft inserting nozzle 21 is wound up by a false twisting device (not shown), cut by the cutter 2, and separated from the woven fabric side, so that the fabric is not moistened. There's nothing to do.

In the above description, the sponge 3 was used as the Minamata material, but various other materials such as cotton fabric and nonwoven fabric may be used.

Although water pipe 5 is shown as a means for supplying water to the Minamata entity, it is of course not limited to this form; for example, in the embodiment of FIG. It may be arranged so that it comes into contact with the sponge 3 each time the water is transferred.

Incidentally, it is also possible to improve the permeability by adding a surfactant such as soapy water to the water contained in the Minamata material.

As described above, according to the fiber splitting prevention device of the present invention, a mechanism for applying an appropriate amount of water to a predetermined portion of the weft that will become the leading edge during flight is provided in the part that swings integrally with the reed. from,
It can prevent weft yarns from splitting during flying, prevents tangles and pilling from occurring at the tips of weft yarns, and has the effect of producing a good quality woven fabric with no flaws.Furthermore, it is extremely simple and therefore low cost. There are also effects that can be created with.

Since the weft yarn can be heated for a relatively long time, the weft yarn can be reliably heated even if the loom operates at high speed.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a weft end splitting prevention device of a loom according to the present invention. Explanation of symbols, 2...Cutter, 3...
Sponge (Minamata tangible), 5... Water pipe, 6...
...Nozzle, 11...Bracket, 21...
...Weft insertion nozzle, 22゜22' ...Weft thread.

Claims (1)

[Scope of Claims] 1. A water holding body having a water-containing function, which is arranged at a part that swings together with the reed slightly on the weft insertion side of the weft cutter, and a means for supplying water to the water holding body, A device for preventing splitting of a weft end in a fragmentary loom, characterized in that, prior to the operation of the cutter, a portion of the weft near the cut portion is brought into contact with the water retaining body and moistened. 2. A device for preventing splitting of weft ends in a fragmentary loom according to claim 1, wherein the water retaining body having a water-retaining function is a sponge. 3. A weft end splitting prevention device in a fragmentary loom according to claim 1 or 2, wherein the means for supplying water is formed by a tube having a nozzle at its tip. 4. A weft end splitting prevention device in a fragmentary loom according to any one of claims 1 to 3, characterized in that the water holding body is fixed to a reed.