JPH01239135A - Weft end sagging-preventing apparatus in shuttleless loom - Google Patents

Abstract

PURPOSE:To securely remove the sagging of the top portion of a weft picked into a warp opening, by disposing a yarn end-catching cable between plural trimmed selvedge yarns in a specific configuration. CONSTITUTION:A yarn end-catching cable t0 is disposed between plural trimmed selvedge yarns for entangle-holding the top portion of a weft Y picked with a nozzle for the picking. The yarn end-catching cable t0 is disposed parallelly with warp lines when watched in a vertical direction and downwardly from the picking passageway 1 at the position of the picking passageway 1 and upwardly from the cloth fell W1 at the position of the cloth fell W1 when watched in a horizontal direction. In short, before a reed goes ahead to reach the cloth fell for the beating-up of the cloth, the top portion of the picked weft Y contacts with the yarn end-catching cable to allow the weft Y to transfer in a direction deviating from the weft passageway 1, thereby pulling the top portion to remove the entanglement of the top portion of the picked weft Y.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a weft end loosening prevention device in a shuttleless Wi machine.

(Prior art) A method of catching the tip of the weft inserted by the main nozzle for weft insertion using a device other than a discarded selvedge is disclosed in Japanese Utility Model Application No. 57-167790, Japanese Utility Model Application Publication No. 60-63580, and Japanese Utility Model Application No. 61-1999.
It is disclosed in Japanese Patent No. 116776. Jitsukai Showa 57-1
In Japanese Patent No. 67'790, a slotted slot is provided at the reed part corresponding to the reaching limit of the weft thread tip, and an arm guide is introduced into the slit as the reed advances, and by this introduction, the weft thread tip part is bent and captured. ing. In Japanese Utility Model Application No. 60-63580, a nozzle and a capture pipe are opposed to each other with a weft guide passage and a reed in between, and the weft tip is bent and introduced into the capture pipe by air injection from the nozzle and captured. Jitsukai Showa 6
In Japanese Patent No. 1-116776, a slider is installed along the warp line on the outside of the warp group, and this slider relatively sweeps the weft guide path as the reed moves forward. The weft ends are bent and captured by the slider and the warp group.

(Problem to be Solved by the Invention) However, in the method disclosed in Japanese Utility Model Application Publication No. 57-167790, in order to avoid contact between the vibrating layer and the arm guide, the arm guide inserted into the slit and the layer Therefore, the degree of bending of the weft tip becomes small. Therefore, the tip of the weft yarn, which is bent and captured, tends to slip out, making it impossible to obtain an effective loosening prevention effect. Moreover, since the mounting position of the arm guide cannot be changed, it is not possible to cope with changes in weave width.

In the air injection method disclosed in Japanese Utility Model Publication No. 60-63580, the weft gripping force tends to be insufficient unless a large amount of air is used.
An increase in air consumption is unavoidable.

Moreover, it is necessary to install the capture pipe on the slay,
This goes against the need to reduce the weight of Slay, which is necessary for high-speed swinging.

In the method disclosed in Japanese Utility Model Publication No. 61-116776, the degree of bending of the weft tip is small, and the tip side of the weft from the contact area with the slider is in a free state, so that an effective loosening prevention effect cannot be obtained.

An object of the present invention is to provide a weft end loosening prevention device that provides an effective loosening prevention effect.

(Means for Solving the Problems) For this purpose, in the present invention, yarn ends parallel to the warp rows when viewed in the vertical direction are provided between a plurality of selvedge yarns that grip the tips of the weft yarns injected from the main nozzle for weft insertion. A catching line was provided, and the yarn end catching line was set at a height that relatively sweeps the weft guide path ahead of the warp for discarding selvedge yarns as the reed moves forward in beating the reed.

(Function) As the reed moves forward, the yarn end catching line relatively sweeps through the weft guide path, and the weft tip in the guide path is hooked on the yarn end catching line between the selvedge warp threads. As a result, the weft tip is bent and captured into a sharp point by engagement with the yarn end capture line and the selvedge yarns on both sides thereof, and this bent capture effectively prevents the weft tip from loosening.

(Example) Hereinafter, an example embodying the present invention will be described based on FIGS. 1 to 3.

The weft yarn Y ejected from the weft insertion main nozzle 1 flies through the guide holes 4a of a large number of weft yarn guides 4 arranged in parallel on the slay 2 facing the reed 3, and the weft yarn Y in the guide holes a. The flight is assisted by the jet action of the auxiliary nozzle 5. A first guide arm 7 is provided on the side of the temple device 6 on the side opposite to weft insertion to prevent weaving shrinkage in the weaving width direction near the front Wl of the woven fabric W.
is erected, and behind the swing area of the reed 3, a second guide arm 8 is suspended and supported by a support bracket (not shown) of a rotating selvage forming device that forms the selvage of the woven fabric W. There is. The mounting position of this support bracket in the weave width direction can be adjusted. Both guide arms 7°8 have position adjustment grooves 7a, 8.
guide pins 7b, 8b are fastened to the position adjustment grooves 7a, 8a so that their mounting positions can be adjusted. The temple device 6 is supported by a support bar 9 so that its mounting position can be adjusted in the weaving width direction.

The upper and lower warp threads t1. The shedding of t2 is performed slightly below the shedding of the upper and lower warps TI and T2, and the closing position of the upper and lower selvage threads tl and t2 is at the upper and lower warps 'r1. 'r
, is slightly lower than . Then, the loosening prevention yarn tg, which is supplied in the same way as the selvage threads z and t2, passes through the reed 3 and is stretched between the guide bins 7b and 8b, and the upper and lower selvage threads t1. It is picked up and discharged together with the discarded selvage at the same speed as the discarded selvedge formed at t2. The lower selvage thread t2 and the loosening prevention thread tg are passed between the layers 3a of the reed 3, as shown in FIG.
It is passed between the layers 3a and between the upper and lower selvedge threads tl and t2 independently from the selvedge. The height and inclination of the loosening prevention yarn to are as shown in Fig. 1(a).
The system plate of the weft guide 4 is set so that it is located slightly below the guide hole 4a when the weft yarn reaches around 2, and as shown in FIG. 2(a), the system plate of the weft guide 4 is positioned near the slit 4b. There is.

As shown in FIGS. 1(a) and 1(b), when the tip of the weft yarn Y reaches the predetermined weft insertion position and weft insertion is completed, the reed 3
is moving forward toward the fabric front W1, and the upper and lower warps T1. T2
And the upper and lower selvedge threads tl and t2 are heading toward the closed state.

At this time, the loosening prevention thread t.

are located slightly below the guide hole 4a, and the lower warp threads T2 and the lower selvage threads t2 that go upward are located below the loosening prevention threads to in the vicinity of the guide hole 4a. When the reed 3 moves further forward from this state as shown in FIG. 2(a), the loosening prevention yarn tQ is placed in the weft guide path formed by the guide hole 4a row in advance of the lower warp yarn T2 and the lower selvage yarn t2. Sweep relatively. Therefore, the loosening prevention thread 1 (,) engages with the tip of the fully stretched weft thread Y prior to the lower selvage thread t2, and the second
As shown in figure (b), loosening prevention thread 1. ) crosses the upper selvedge yarn t1 while lifting the tip of the weft Y into a bent state. As a result, the tip of the weft yarn Y is held in a bent state by the loosening prevention yarn t (1) and the upper selvage yarns tl on both sides thereof.

The reed 3 moves further forward from the state shown in FIGS. 2(a) and 2(b), and the upper and lower warp threads TI as shown in FIG. 3(a).

T2 and upper and lower selvage threads t1. When t2 is in the closed state, as shown in FIG. 3(b), the loosening prevention thread tO is moved by the upper and lower two selvage threads tl on the anti-weft insertion side, the gripping action of t2, and the one upper selvage thread on the weft insertion side. The tip of the weft yarn Y, which is being engaged by the selvage yarn tt, is drawn through the liquid layer 3a to the rear of the layered layer 3a. Therefore, the weft tip is bent and gripped in a sharp point within an extremely narrow interval between the upper selvedge threads t1 on both sides of the loosening prevention yarn tO, and this sharp bending grip reliably prevents the weft tip from loosening. In addition, compared to expensive suction devices that consume a lot of air, it is much more advantageous in terms of cost and component structure, as it uses the conventional selvage yarn as the loosening prevention yarn. ) can be easily adjusted by adjusting the positions of the guide bins 7b and 8b.

In this embodiment, a loosening prevention thread tQ is stretched between the temple device 6 whose attachment position can be adjusted in the weaving width direction and the rotary selvage forming device support bracket, which are members whose attachment position can be adjusted according to the weaving width. Therefore, the loosening prevention action position can be easily changed even when the weave width is changed.

Of course, the present invention is not limited to the above-mentioned embodiments. For example, the number of loosening prevention threads and selvage threads may be changed, the arrangement of the loosening prevention threads and selvage threads may be changed, or the fourth to fourth embodiments may be modified.
The embodiment shown in FIG. 7 is also possible.

In the embodiment shown in FIG. 4, a steel wire 10 is stretched between the guide arms 7.8 instead of the thread, and in FIG. 5, a thin iron plate 11 with a corrugated upper edge is stretched between the guide arms 7.8. It is being constructed in The corrugated shape of the upper edge increases the resistance to contact with the weft yarn Y, and the gripping of the weft yarn tip is performed more effectively.

The embodiment shown in FIG. 6 is applicable to the modified reed 12, and the height position and inclination of the loosening prevention thread tQ are determined by the swing locus of the weft guide groove 12a on the front surface of the modified reed 12. This is opposite to the case of the reed 3, and the height position at the end of weft insertion is higher than the weft guide groove 123. In the embodiment shown in FIG. 7, a thin plate 13 whose upper edge serves as a yarn end catching line is cantilevered by a temple device 6, and the tip of the thin plate 13 is passed between the liquid parts 3a of the reed 3.

In this embodiment, the loosening of the weft tip is prevented in the same way as in the previous embodiments.

(Effects of the Invention) As described in detail above, the present invention provides a method for controlling the weft threads by using yarn end catching lines arranged parallel to the warp rows when viewed in the vertical direction between the plurality of threads gripping the tips of the weft yarns. Since the weft guide path is relatively swept before the selvage, the weft tip is bent and held at an acute angle within an extremely narrow interval between the selvedge yarns, thereby reliably preventing the weft tip from loosening. It has the excellent effect of

[Brief explanation of the drawing]

1 to 3 show an embodiment embodying the present invention.
Figure (a) is a side sectional view near the end of weft insertion, Figure 1 (b)
is an enlarged sectional view of A-AvA in Fig. 1(a), Fig. 2(a)
is a side sectional view showing the state in which the reed is further advanced;
) is an enlarged cross-sectional view taken along the line B-B in Fig. 2(a), Fig. 3<a>
3(b) is a side sectional view showing the closed state, and FIG. 3(b) is a side sectional view showing the closed state.
), and FIGS. 4 to 7 are side sectional views showing separate parts. A reed 3, a guide hole 4a and a weft guide groove 12a forming a weft guide path, a steel wire 10 and a thin plate 11.13 forming a yarn catching line, and a selvedge yarn TL. t2, loosening prevention yarn to, weft Y0

Claims (1)

[Claims] 1 A yarn end catching line that is parallel to the warp when viewed in the vertical direction is provided between the plurality of selvedge yarns that grip the tips of the wefts ejected from the main nozzle for weft insertion, and the selvedges are caught as the reed moves forward in beating the reed. A weft end loosening prevention device for a shuttleless loom, in which a yarn end capture line is set at a height that relatively sweeps the weft guide path ahead of the selvedge yarn.