JPH0978404A - Apparatus for treating weft end in shuttleless loom and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for treating a weft end capable of surely retaining a weft made to run between opened warp groups at proper tension in a fluid jet type shuttleless loom, and also provide a method therefor. SOLUTION: This apparatus for treating a weft end in a shuttleless loom comprises a fluid jet nozzle 2 for inserting a weft 1 brought by a jet fluid between warp groups 6, a weft end sucking device 3 which is faced to the nozzle 2 and laid on a running route of the weft at the opposite side of yarn feeding so as to suck the weft end of the inserted weft and a pair of revolving holders 4 to grip the weft 1 moved to the position of a cloth fell during beating up. A method for using the apparatus is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention causes a weft yarn to accompany a jet of water such as water jet or jet air, and inserts the weft yarn between warp groups which are opened vertically (hereinafter, referred to as "helices"). BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for treating a yarn end of a weft thread inserted between warp groups in a fluid jet type shuttleless loom.

[0002]

2. Description of the Related Art Conventionally, as a shuttleless loom, a loom using a water jet loom or an air jet loom, in which a fluid such as jet water or jet air is accompanied by a weft yarn and is put in, is generally used. In such a shuttleless loom, the weft yarn can be woven into the warp yarn group by causing the jet fluid to accompany the weft yarn and causing the weft yarn to fly and pass through the shed.

In the above shuttleless loom, the length of the weft yarn is supplied when the weft yarn is fed from the weft feeder to the fluid jet nozzle and jetted from the nozzle to fly the weft yarn to the shed. The weft of the required length is caused to fly along the shed along with the jet fluid.

In this way, the weft that flew through the shed was
The two catch cords which are installed facing the fluid ejection nozzle and which are opened vertically reach the openings. And
The opening of the catch cord is closed at the timing when the weft reaches the opening of the catch cord with certainty, whereby the end of the weft thread inserted through the shed is held.

In this way, the yarn ends of the weft yarns, which have been put into the weft yarns, are woven into the warp yarn group by the subsequent beating, so that it is necessary to surely grasp the yarn ends. As a conventional device for gripping the yarn end of such a weft yarn, there is one proposed in FIG. 1 of JP-A-60-2742.

That is, the apparatus is constructed such that two warps are provided above and below, respectively, with a warp group mounted on a loom being sandwiched in between and facing a fluid jet nozzle for causing a weft to fly along with a jet stream. The weft thread is inserted between a pair of upper and lower catch cords (four in total), and after the beating, the catch cord is sent to the false twisting device, and the false twist device twists the false yarn to grip the weft yarn. There is.

In such a conventional device, if the end of the weft does not enter the opening of the catch cord, the weft is not gripped by the catch cord, and therefore, the weft detecting device does not detect the weft and inserts the weft. It is judged as a mistake and the loom is stopped. In addition, even if the catch cord is cut for some reason, the weft is not gripped by the catch cord, which also causes a stop.

Therefore, it is necessary to ensure that the weft thread enters the opening portion of the catch cord, and for this purpose, the opening amount of the above-mentioned pair of catch cords may be increased. However, the opening amount is determined by the opening amount of the heddle due to the structural problem of the loom.
There is a problem that it is not possible to freely change only the opening amount of the catch cord.

Further, in the grip of the weft thread end by such a catch cord, the tension of the weft thread essentially depends on the tension tension of the catch cord, so that the weft thread tension cannot be freely set. If the tension in tension is too high, the catch cord will be easily broken, which will cause the loom to stop. If the tension in tension is too low, loosening of the ears of the fabric will occur and the quality of the fabric will be degraded. .

[0010]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of a shuttleless loom, the present invention is capable of reliably and properly gripping the weft end inserted in the shed, and of the loom. An object of the present invention is to provide a weft yarn end treatment device and method capable of significantly reducing the number of stops.

[0011]

According to the present invention, a fluid jet nozzle for inserting a weft yarn entrained by a jet fluid between warp yarn groups having openings, and a weft yarn end inserted by suction. In order to do so, a weft end suction device provided on the flight path of the weft yarn on the anti-feed yarn side facing the nozzle, and a pair of weft yarns for sandwiching the weft yarn that has moved to the cloth fell position during beating. There is provided a weft yarn end treatment device in a shuttleless loom, which comprises a rotating clamp body.

Further, according to the present invention, the weft is caused to fly along with the jet fluid between the warp groups which are opened, the weft thus caused is sucked and held, and the weft moved to the cloth fell position during beating. Provided is a method for treating a weft end in a shuttleless loom, which comprises weaving while weaving.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an apparatus and a method therefor according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing a fluid jet type shuttleless loom for explaining the apparatus and method of the present invention. In the figure, 1 is a weft, 1'is a weft supply body of the weft (1),
Reference numeral 2 is a fluid injection nozzle, 3 is a weft yarn end suction device, 4 is a pair of clamps which are placed at the cloth fell position and rotate, 5 is a reed, 6
Is a warp group that is opened vertically, 7 is a weft cutter, 8 is a weft measuring roller, and 9 is a weft detector.

In the figure, the weft (1) is supplied from a weft supply body (1 '), a predetermined length is measured by a weft length measuring roller (8), and the weft is supplied to a fluid jet nozzle (2). It Then, the fluid ejected from the fluid ejecting nozzle (2) accompanies the fluid and flies through the shed. The flying weft ends are sucked by the weft end suction device (3) provided on the flight path of the wefts (1).

At this time, by controlling the force with which the weft end suction device (3) sucks the weft (1), the weft tension can be controlled to a desired value. For controlling the suction force, for example, if the suction force of the suction device (3) is generated by being connected to an exhaust fan or a vacuum generator, a known method such as a flow rate adjusting valve for adjusting the air volume of the exhaust fan or the vacuum generator. Can be achieved by controlling with. Further, the pressure of the compressed air may be adjusted as long as it is a device that injects compressed air in the suction direction to generate an air flow flowing to the suction device.

In this way, the weft yarn (1) sucked and held by the suction device (3) with an appropriate tension is subsequently driven into the space between the warp yarn groups (6) by the repulsion movement of the reed (5). And is woven. At this time, the weft thread (1) moves to the weaving cloth position with the beating motion, but since the sandwiching body (4) composed of a pair of rotating bodies is provided at the weaving cloth position, the weft thread (1) 1) is held by the holding body (4).

At this time, as the holding body (4), as shown in FIG. 1, an arbitrary rotating body such as a flat belt or a disc can be appropriately selected according to its application. Further, one may be driven and the other may be brought into contact with and driven, or both may be driven in synchronization. However, the rotation speed of the sandwiching body may be adapted to the feeding speed of the woven cloth. As a result, a clamping force capable of sufficiently compensating for the tension generated during reeding is obtained.

When the beating is completed, the weft (1) is cut by the cutter (7) and one weaving cycle is completed. As such a cutter (7), a mechanical type, a type that melts the weft with a heated cutting blade, and the like can be appropriately used.

[0020]

Example A water jet loom manufactured by Nissan Texis Co., Ltd. was used as a loom, and the number of revolutions thereof was 750 rpm as a typical value. Then, a taffeta was woven using a non-twisted polyester yarn of 75 de / 36 fil as the weft to fly and a polyester yarn of 50 de / 24 fil as the warp group. At this time, as the weft yarn end treating device, the one shown in FIG. 1 was used to perform the weaving test. In addition, as a comparative example, weavability test using a conventional catch cord was performed.

As a result, in the case of the embodiment using the device and method of the present invention, the number of times the loom is stopped (the number of stops per day per loom) is 0.4 times / average.
Although it was a stand / day, in the comparative example using the catch code, it was 1.5 times / stand / day on average, and the example was superior in weaving property.

[0022]

As described above, according to the method of the present invention, the weft yarn flying in the shed can be reliably and appropriately gripped, and the weaving can be performed without impairing the quality of the woven fabric. can do. Further, since the catch cord is not used as in the conventional case, the number of times the loom is stopped can be greatly reduced, the weaving speed can be increased, and the weaving efficiency can be improved. Play.

[Brief description of drawings]

FIG. 1 is a perspective view for explaining an apparatus and a method thereof according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Weft 2 Fluid injection nozzle 3 Weft end suction device 4 A pair of clamps 5 Reed 6 Warp group 7 Weft cutter

Claims (2)

[Claims] 1. A fluid injection nozzle for inserting a weft thread entrained by a jet fluid between open warp groups, and a counter-feeding thread for sucking an end of the weft thread in which the weft thread is inserted. Side picking device, which is provided on the flight path of the weft on the side, and a pair of rotating nipping bodies for nipping the weft that has moved to the cloth fell position during beating, between the shuttles. Weft end treatment device for weaving machines. 2. Weaving is carried out by entraining the wefts in association with the jet fluid, between the warp groups that have been opened, the flying wefts are sucked and held, and the wefts that have moved to the cloth fell position during beating are sandwiched and weaved. A method for treating a weft end in a shuttleless loom, which comprises: