JPS6034066Y2 - Injection nozzle for loom - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fluid injection nozzle for a fluid injection type loom, and more specifically, to a fluid injection nozzle that eliminates fluctuations in the yarn entry angle due to the nozzle and improves the accuracy of the nozzle.

A fluid jet loom is a loom that performs weft insertion using a jet of air or water. It consists of various functions such as placing the measured weft yarn on the fluid ejected from the nozzle and passing it through the shed, but the jet nozzle, which places the weft yarn on a jet stream and passes it through the shed, is the most important component. Its quality directly affects weft insertion.
It affects the quality of the fabric itself.

For this reason, in manufacturing this type of nozzle, it has conventionally been required that the mechanical precision of the taper portion forming the orifice at the tip of the nozzle be extremely high.

However, in the past, the typical manufacturing configuration of this type of injection nozzle is that the needle portion at the tip of the nozzle is formed integrally with the nozzle body, or as shown in FIG. The needle portion 2 is formed by being fitted and fixed to the nozzle body 1 with adhesive or screws.

However, when a part of the needle taper is sent into the orifice using a feeding mechanism such as gluing, caulking, or a screw, and forming an annular orifice between it and the surrounding guide (not shown), the needle taper is inserted into the orifice hole. On the other hand, since the degree of concentricity of a part of the needle taper must be precisely manufactured, manufacturing difficulties have been unavoidable.

Moreover, since the wall thickness of the tip of the needle generally used in manufacturing is as thin as about 0.2 mm, it is not easy to perform the above-mentioned precision processing, which is extremely expensive processing.

The present invention addresses the above-mentioned circumstances, overcomes the difficulties in manufacturing conventional nozzles, and aims to provide a highly accurate injection nozzle at a low cost.

That is, a feature of the present invention, which is distantly related to the above object, resides in the configuration of an injection nozzle in which the nozzle tip needle is separate from the nozzle body and is attached to the nozzle body tip so as to be self-aligned by the jet flow.

Hereinafter, embodiments of the nozzle of the present invention will be described with reference to the accompanying drawings.

FIG. 2 shows an example of the nozzle of the present invention. In the figure, 1 is the nozzle body, 2 is the nozzle tip, that is, the needle part, and the image parts 1 and 2 are separate parts. For example, the nozzle tip 2 is the nozzle tip. It is made of a highly wear-resistant material, and the base of the nozzle tip needle portion 2 is fitted into the concave surface portion 3 formed in a concave spherical shape at the tip of the nozzle body 1 at the curved surface portion. They are integrally fitted together via a ring 4.

A thread path 5 is communicated through both 1 and 2 to the center thereof.

In the above configuration, the nozzle body 1 and the nozzle tip 2
The fitting connection with the concave surface portion 3 is self-aligning, and the nozzle tip portion 2 is maintained concentrically with respect to the nozzle body 1 by an aligning action via the O-ring 4.

To further explain this in detail with reference to FIG. 3, fluid ejects along the outer circumference of the nozzle tip 2 through an annular orifice formed between a guide (not shown) and the tapered outer circumferential surface of the nozzle tip 2. If the force V is broken down, it can be explained as both a component force v1 in the jet flow direction and a component force v2 in the direction of the nozzle tip needle.

Of these, the needle direction component force v2 acts simultaneously on all points on the outer periphery of the needle, which is the nozzle tip 2, according to Pascal's principle, and therefore acts as an action that causes the nozzle tip 2 to be concentric with the orifice through which the fluid passes. , which acts as an aligning force on the nozzle tip.

This fact has also been fully confirmed by experimental results.

That is, in the nozzle shown in Fig. 2, lace processing is applied to the nozzle body 1 and nozzle tip 2, respectively, and the O-rings 4 are used to fit and fix the nozzle, and the nozzle is supported and mounted on a nozzle case (not shown) in the same way as in the conventional case, and fluid is sprayed. Of course, there was almost no change in the thread entry angle when this was carried out, and even when fluid was ejected using multiple nozzle cases, no change was observed in the thread entry angle at all.

When assembling the jet nozzle and the nozzle case, the yarn can be inserted extremely smoothly without having to consider various complicated ways of matching the two.

This shows that the injection nozzle itself is self-aligned each time with respect to each nozzle case, and unlike conventional injection nozzles, there is no matching between the nozzle and the nozzle case. This overcomes the inconvenience of the combination of being unusable.

In the embodiment shown in FIG. 2, one O-ring 4 is used for fitting and fixing the nozzle body 1 and the nozzle tip 2, but this is not limited to one O-ring. It may be fixed using a plurality of O-rings 4a, 4a of the same diameter or different diameters (see Fig. 4), or it may be fixed using an elastic resin material 4' made of silicone resin, etc. (See Figure 5).

In particular, the alignment effect is 0.1 to 0.0 at the nozzle tip.
Since an alignment amount of 2ys or less is sufficient, it is possible to obtain the desired alignment effect even with the above-mentioned somewhat strong fixing means.

In particular, in the case of using one O-ring, the latter fixing method is preferable because it is easily affected by variations in the thickness tolerance of the O-ring used depending on the degree of fitting, and variations in the wire diameter due to pars, etc. There is.

Thus, by using the spray nozzle of the present invention as described above, it is possible to bring about accurate weft thread shedding action through its centering action, and to perform the weaving operation smoothly without causing any trouble during weaving.

As described above, the injection nozzle of the present invention has a nozzle body and a nozzle tip separated from each other, and the nozzle tip is attached to the nozzle body so that it can be aligned with the nozzle body, so it requires precision machining and complicated work as in the past. It has the features of making production extremely simple, eliminating fluctuations in the thread insertion angle through its alignment action, ensuring accurate weft insertion, and greatly improving the mechanical precision of the nozzle. As mentioned above, it has various advantages such as ease of processing, lower manufacturing costs, and improved practicality, and its usefulness is expected to increase with the spread of fluid jet looms.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing a typical example of a conventional injection nozzle;
FIG. 2 is a sectional view showing an example of the injection nozzle according to the present invention;
Figure 3 is an explanatory diagram of the fluid jet force in the same jet nozzle;
4 and 5 are sectional views of injection nozzles according to other embodiments of the present invention. 1...Nozzle body, 2...Nozzle tip, 3...Concave surface part, 4...0 ring,
4a, 4b...Osing, 4'...Elastic resin material.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ In an injection nozzle for a fluid injection type loom, the nozzle tip is formed separately from the nozzle body, and the tip is self-injected by a jet into a concave part formed with a concave curve at the tip of the nozzle body. An injection nozzle for a loom, characterized in that it is surface-coupled to enable alignment. 2. When the nozzle tip is in the concave part of the nozzle body tip,
The injection nozzle for a loom according to claim 1, which is connected to the nozzle body through an elastic material.