JPS6094648A - Weft yarn traction device of air jet type loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a weft tensioner 1 of an air injection loom that tensions the inserted weft, which is located near the weft arrival point on the opposite side of the weft insertion side of the air injection loom. It is related to the device.

(Prior art) In air injection looms, the inserted weft needs to be under uniform tension, but with conventional devices, the air jet on the side opposite to the weft insertion is attenuated, so the weft Since the tension at the tip becomes small and the weft tends to loosen, it was necessary to prevent this.

As a counter-broom, there are two methods: vacuum suction of the weft thread on the non-weft insertion side, a method of jetting air in the weft insertion direction on the non-weft insertion side, and a suction port of a yarn end traction device that uses both. There is a method of applying appropriate tension to the weft by forcing the weft to face the weft insertion path and forcibly sucking the flying tip of the weft.

As such a conventional device, for example,
There is one described in Japanese Patent No.-9547. In this case, a suction nozzle having an injection port opened in the direction of movement of the suction airflow is arranged near the weft arrival point on the opposite side of the weft insertion.

By the way, as shown in FIG. 1, there is a weft in which a large number of guide elements each having a guide hole 2 and a continuous weft escape gap 3 are arranged in parallel in the weft insertion direction to form a weft guide path. In an air injection loom equipped with a weft insertion device, the inserted weft is ejected from the guide hole 2 through the escape gap 8 and beaten by the reed 4. Child 1 is made to sink into the bottom of the fabric.

Therefore, the weft yarn just before the end of weft insertion passes approximately through the center of the guide path, but in the subsequent beating process, the weft yarn gradually approaches the weft escape gap 3.

This type of air injection loom was developed in 1989-1995.
When using the No. 47 device, it is possible to produce a weft yarn with a nearly satisfactory weft pulling effect during weft insertion, but in the uniform beating process after weft insertion, the weft yarn is located close to the circumference of the suction nozzle. Therefore, sufficient traction effect cannot be obtained. That is, there are problems such as the weft yarns not being sufficiently tensioned until beating the reed, resulting in loose ends, and the weft yarns that cannot be stretched straight becoming woven into the woven fabric, resulting in scratches.

(Objective) The present invention has been made in order to solve the problems of the conventional device described above, and it is an object of the present invention to provide a weft end traction device that can obtain a sufficient weft traction effect even during the beating process. It is intended for all purposes.

(Structure) In order to achieve the above-mentioned object, the present invention has an inner hole having a shape corresponding to the guide hole of the guide element near the weft arrival point on the outside of the end of the woven fabric on the opposite weft insertion side, and the inner hole has a shape corresponding to the guide hole of the guide. has a plurality of air outlets that inject air at a predetermined angle from the end surface on the opposite side of the weft insertion side to one point on the axis of the weft guide passage, and at least two of the plurality of air outlets a weft traction nozzle provided at a position corresponding to the vicinity of the immediate lower part of the weft exit gap of the guide; and immediately downstream of this, at least its entrance portion has a slightly larger shape similar to the inner hole of the traction nozzle; , suction tubes each having an inner hole that converges in the weft insertion direction and then expands are arranged in parallel to form a weft pulling device.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 2 to 6. As shown in FIG. 2, in the mounting groove 6 formed in the reed holder 5, there is a guide block formed by assembling the reed 4 and the guide, and a weft traction device N7 according to the present invention.
are collinear and fixed. and weft traction device 7
consists of a nozzle 8, a suction pipe 9, and a bracket 10 that integrates these.

As shown in FIG. 3, the guide element is located at the base 1a.

The straight part 1b and the curved part 1C form a guide hole ]d (4), and there is a weft escape rough space 15 between these tips. f
is formed.

As shown in FIG. 4, the weft pulling nozzle 8 has an inner hole 8d having a shape corresponding to the guide hole d of the guide element 1, and has an inner hole 8d on the end face of the weft insertion height 1 opposite to the weft insertion height 1 on the axis l of the guide passage. Air outlet N1. N, , N8°N4. N is bored so as to communicate with the hollow portion 8b of the main body 8a. In addition, no slit is formed at a location corresponding to the weft escape gap f of the guide, but a slit is formed at mm&, which surrounds the inner hole 8d. A joint 8g serving as an air intake port is formed at one end of the main body 8a.

As shown in FIG. 5, the pulling pipe 9 has a large opening 9a with a circumferential shape almost similar to the inner hole 8d of the nozzle 8 described above, and a tapered part 9b that gradually converges in Q. Further, an inner hole is formed, which includes a constricted portion 90 connected to the tapered portion 9b, and a protruding PIt portion 9d whose hole diameter is expanded following the constricted portion 90.

Then, each of the above-mentioned constituent members is attached to the bracket] 0 - When physically making silk, the center of the inner hole 8d of the nozzle 8 and the suction tube 9
and the center of the inlet opening 9a.

(Function) Next, the sixth function of the device of the present invention constructed as described above.
This will be explained with reference to the figure. During the weft insertion period, the inserted weft yarn flies near the axis l of the guide hole, so it is pulled by the air injected from the jet ports N□ to NIs. . When the weft insertion is completed and the setting stroke begins, the guide gradually sinks below the woven fabric, and at this time the weft approaches the weft 1 ejection gap f, so that even at the nozzle 8, It is located in the triangular area in the upper right corner of Figure 6, but among the injection ports N0 to N5, two injection ports, N□ and N5, are arranged so as to cover this triangular area. Therefore, according to the present invention, the traction force of the weft is maintained even in this portion.

(effect) Since the present invention is as described above, according to the present invention (7) 9d...divergent part]0...bracket.

For example, the excellent effect of being able to provide sufficient traction to the weft yarns even in the beating process, where the traction force for the weft yarns was conventionally insufficient.

[Brief explanation of the drawing]

Figure 1 is a partial elevational view of an air-injection type loom, Figure 2 is a partial perspective view of a loom equipped with the device of the present invention, Figure 3 (a) is a side view of the guide, and Figure 3 (b) is 4(a) is a side view of the weft traction nozzle, FIG. 4(b) is a partially expanded sectional view taken along line B-B, ]...Guide
]a...Base]b...Straight part]C...Curved part 1d...Guide hole ]f...Gap for weft escape 8...
Weft traction nozzle 8a...Main body 8b...Hollow part 8
d...Inner hole N□+ N2+ NB+ N4+ N5... Air jet port 9... Suction pipe 9a... Inlet part (opening) 9b...
・Taper part 9C...Aperture part (8) Whistle 1 You 1 Patent applicant Nissan Motor Co., Ltd. Patent attorney Akihide Sugimura, x;:, 7. Sky (−
・・１ ：i”' 、 、、． ・Igono M7 1 I1 Figure 3 (a,) ＾A (,b)

Claims (1)

[Scope of Claims] 1. A weft inserting air guide hole 1d and a weft exit space connected thereto @] f E-formed guide elements are arranged in parallel at a predetermined interval in the weft inserting direction, and these guide elements] Near the weft arrival point on the opposite side of the weft insertion side of the row, there are a plurality of air outlets N, , N2. that eject air in the weft insertion direction to pull the weft.
N8. N4. In an air injection loom equipped with a weft traction nozzle 8 having a weft traction nozzle 8 around which the weft traction nozzle 8 is provided, the weft traction nozzle 8 has an inner hole 8d having a shape corresponding to the guide hole 1d of the guide element. At least two of the air outlets N11N5 among the plurality of air outlets provided on the end face on the opposite side of weft insertion around the guide element 8d are arranged at positions corresponding to the lower part of the weft escape gap 1f of the guide element. Immediately downstream of this weft pulling nozzle 8, at least its inlet portion 9a has a slightly larger shape that is aligned with the inner hole 8d of the weft pulling nozzle 8, and converges in the weft insertion direction. A weft pulling device for an air injection loom, characterized in that the inner hole has a tapered part 9b and an expanded diverging part 9d, and a suction pipe 9 is arranged in parallel.