JPS5854041A - Wefting auxiliary nozzle apparatus 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 The present invention relates to an auxiliary weft insertion nozzle device for an air-jet loom.

As a weft insertion device for an air injection loom, so-called closed-type guides having weft guide holes are arranged in the weft insertion direction to form a guide path.

There is one in which auxiliary nozzles are arranged at predetermined intervals in the weft insertion direction to eject air obliquely to the axis of the guide passage, and the air ejected from the auxiliary nozzles blows the weft threads one after another for weft insertion. .

The auxiliary nozzle type weft inserting device using such a rose type guide can achieve
Although the weft winds slightly in the guide passage under the action of the air ejected from the auxiliary nozzle and the air reflected from the wall of the guide hole, it flies near the axis of the guide passage where there is little wall resistance, that is, the flow velocity is high. Therefore, it is preferable from the viewpoint of weft conveyance efficiency.

However, when moving to the opposite side of the weft insertion, the swing of the tip of the weft increases, and especially when the area of the guide hole is made small, the tip of one weft fills the guide passage and oscillates. There were cases where the weft got caught in the guide or the puller came out of the guide, resulting in defective weft insertion.

This is because the pressurized air ejected from the auxiliary nozzle into the guide passage expands and increases its flow velocity, but the structure of closed type guides makes it difficult for air to escape, so reducing the cross-sectional area of the guide passage further increases the flow velocity. This means an increase of 1'. As a result, the part of the weft thread in the guide path is inserted at an increased speed, but since the weft thread, especially its tip, is in a free state, it flies out due to small disturbances in the airflow, is widened, and reaches the guide piece. It is thought that it gets caught or jumps out from the guide's weft escape gap.

The present invention was made in view of such a refreshing autumn, and aims to improve the weft conveyance efficiency by making the weft fly around the 411 line of the guide path using a sode assistant nozzle with a small jetting angle. Also, by arranging sleeve support nozzles with a large ejection angle in each predetermined section, and bending the weft yarn toward the guide hole wall side by the ejected air flow midway, the degree of freedom is increased by providing resistance due to the air flow. , the weft runout is prevented from increasing in width to prevent weft insertion failure.

Hereinafter, the present invention will be explained based on the drawings.

FIGS. 1 and 2 show one embodiment of the invention.

To explain Yang Cheng, the block-shaped guide holder 4 is inserted into the holder 18#2 of the reed holder 1 together with the lower frame of the reed 30,
Furthermore, it is fixed by inserting a screw 5 and pushing it in with a bolt 6.Guides 7 are arranged in parallel on the guide holder 4 with a predetermined gap in the weft insertion direction. I
The guide hole 8 has a substantially rectangular guide hole 8 and a weft escape gap @9 connected thereto, and the row of the guide holes 8 forms a guide passage. Further, sleeve assist nozzles 10 are provided upright on the guide holder 4 at predetermined intervals in the weft insertion direction. The auxiliary nozzle 10 is pipe-shaped, and its upper end is closed and a spout 11 is opened on the side wall, and the lower end is connected to a distribution groove 12 formed on the bottom surface of the guide holder 4.
It is opened to 13 is a lock nut, and 14 is an 0 ring. In the distribution groove 12, a joint 1 is connected to the reed holder 1.
Pressure air is introduced at a predetermined timing through a pipe 16 connected through a pipe 5.

Here, the ejection direction line J of the ejection port 11 of the auxiliary nozzle 10 is diagonally intersected with the axis GK of the guide passage, but the auxiliary nozzle 1
Ejection angle θ of the ejection port 11 with respect to the axis G of the guide passage of 0B
2 is the ejection angle θ1 of the ejection port 11 of the other auxiliary nozzle IOA.
It is larger than that. In addition, the vertical H of the guide hole 8 =
4 wn, horizontal L=56, wall thickness t of guide element 7=2.91
m, the gap between the guide elements 7, c = 1.6, and the arrangement pitch of the auxiliary nozzles 10 is 5-50.

Next, the effect will be explained.

The weft 18 of the king nozzle 17 has a relatively small ejection angle θ
When the airflow from the auxiliary nozzle 10A having a jet angle 10A flies slightly meandering around the axis G of the guide passage, the airflow from the auxiliary nozzle IOB having a relatively large jetting angle θ2 arranged in each predetermined section. Under the action of air flow,
Riding this airflow, the guide hole 8 is bent toward the wall surface. Thereafter, the weft yarn 18 begins to fly near the axis q of the guide passage due to the air flow ejected from the auxiliary nozzle 1 (IA) having a small ejection angle θ1.

In this way, when the weft yarn 18 flies in a meandering manner around the axis G of the guide passage and the deflection of the tip becomes large, it is bent toward the wall surface of the guide hole 8 by the action of the air flow ejected from the auxiliary nozzle IOH, and the ejected air The flow provides resistance and freedom is taken away. Therefore, since the weft thread 18 is caught by the air current in that part, the runout of the weft thread 18 up to that point can be suppressed, and the runout of the weft thread 18 after that increases from almost 0, so the overall runout is small. Therefore, the weft thread 18 is no longer caught on the guide element 7. Even in this case, the airflows ejected from the auxiliary nozzles 10A and 10B act on the weft 18 individually, so that no excessive force is applied to the weft 18. Furthermore, since the weft yarn 18 mostly flies near the axis G of the guide passage, the weft conveyance efficiency by the ejected air flow is high, and air consumption can be reduced.

In addition, in this example, two types of auxiliary nozzles 10A, 10B are used.
I glued them together and arranged them at equal pitches, but -
10,000 auxiliary nozzles are arranged at a pitch of 10A, Y, etc.

The other auxiliary nozzle 10B may be arranged between appropriate auxiliary nozzles 10A.

However, the position in the guide path where problems such as -1 weft slipping occur is unique to that loom, and at least the auxiliary nozzle jets in a specific range where such slipping occurs.
It is necessary to adjust the ejection angle.

As explained above, according to the present invention, it is extremely effective for energy saving by improving the weft conveyance efficiency by 1"j1, and it also greatly contributes to stabilizing weft insertion by preventing weft deflection, etc. It is.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being a side longitudinal sectional view and FIG. 2 being a plan cross sectional view of the portion. 7... Guide element 8... Guide hole 10.10A,
10B... Auxiliary nozzle 11... Spout 18
...Weft θ1. θ2...Ejection angle G...Axis of guide passage Patent applicant: Nissan Motor Co., Ltd. Representative Patent attorney Fujio Sasashima Figure 1

Claims (1)

[Claims] A predetermined jetting angle was given to blow out air obliquely to the axis (G) of a guiding passage formed by arranging guide elements (7) having guide holes (8) for weft conveying air in the weft insertion direction. In an auxiliary nozzle device for weft insertion of an air injection loom, in which auxiliary nozzles (10) are arranged at predetermined intervals in the row of guide elements (7), the auxiliary nozzles (10) are arranged next to the appropriate number of auxiliary nozzles (10). An auxiliary nozzle device for inserting weft in an air-injection type loom, characterized in that an auxiliary nozzle giving a jetting angle larger than a predetermined jetting angle is arranged.1.