JPS5915968B2 - Copper alloy for wind instrument reeds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copper alloy for the reed of a wind instrument, particularly a reed of a pole used as a gagaku musical instrument.

The flute is an instrument with a reed called a shita, and is one of the important instruments of gagaku.

It is said that this flute was first introduced to Japan as an instrument for Tang music during the Nara period.

Figure 1 shows the appearance of this rod.

The upper part of the head 1 made from cherry wood etc. 17 pieces 0
It is made of 7 suspended bamboo tubes 2'.

A mouthpiece 3 is provided on the side of the head 1.

The 17 bamboo tubes 2 are closely tied together in a ring shape, and the lower ends of the bamboo tubes have reeds 4, as shown in FIG. 2.

Bronze used for traditional flute reeds was cut from old Korean tableware, gongs, etc., so there were a lot of impurities that degraded the tone, making it difficult to obtain the ideal reed. I couldn't.

Furthermore, the number of old bronze vessels mentioned above, which were considered to be relatively good materials, was decreasing in number, making it difficult to obtain the materials.

The present invention was made in view of this point, and tin 20 to 25
The present invention relates to a copper alloy for wind instrument reeds consisting of 20 to 25% by weight of tin, the balance being copper and 0.2% by weight or less of lead, the balance being copper.

As a result, a pure reed with excellent tone can be obtained, the quality is constant, and it is much easier to manufacture than by containing a minimum amount of lead.

Judging whether the tone is good or bad is mostly based on intuition and requires musical knowledge, but the quality of the tone of a bronze reed is mainly determined by its hardness, tensile strength, etc. Depending on the content of tin, the content of tin has a great influence.

It has been found that bronze containing 20 to 25% tin by weight has particularly excellent tone.

Looking at this from a physical property perspective, the hardness increases rapidly starting from a tin content of 20M, and conversely becomes brittle when the tin content exceeds 25% by weight.

Pull rod, yo tin.

. ~26% by weight - shows high pupils around r30 ky/am'.

In other words, tin 2 has high hardness and tensile strength in terms of physical properties.
It has been found that bronze in the range of 0 to 25 weight ratio is an extremely excellent reed material, and among these, tin in the range of 21 to 23 weight ratio has the best sound quality.

゛In order to finish a reed from a bronze material, it is necessary to remove it with only a chisel cut with a sandpaper, but the lead content must be less than 0.2% by weight, preferably less than 0.1% by weight. When it is included, the ease of machining, that is, the machinability, is significantly improved.

Next, an example will be described.

Example The alloy components of the present invention shown in Table 1 were analyzed by Rutsuho.

After casting, this was face-sided and hot-rolled between 550°C and 720°C.

After hot rolling, a compacting treatment was performed in which the material was heated at 700° C. for 30 minutes and cooled with water.

After pickling the alloy obtained through this treatment, it was cut into predetermined lengths to obtain pieces for lead production.

When this piece was cut and made into a reed, the tone was excellent and the hot workability, machinability, and stiffness were all good. Table 1 shows a comparison with a comparative alloy made in the same way. show.

As mentioned above, the alloy of the present invention has a constant material quality and can produce a reed material with the most beautiful tone.Moreover, the production of reed materials, which used to be left only to special experts, can now be done by people with appropriate training. However, it has become easy to manufacture, and it is extremely useful for the manufacture of wind instruments and especially for the promotion of gagaku.

It goes without saying that the reed material, which produces a delicate whistle-like tone, can also be used as reed material for other wind instruments.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the external appearance of the rod, Fig. 2A is a perspective view of the bamboo tube, and the mouth is a perspective view of the reed. 1; head; 2; bamboo pipe; 3; mouthpiece; 4; reed.

Claims (1)

[Scope of Claims] 1. A copper alloy for wind instrument reeds comprising 20 to 25% by weight of tin and the balance copper. 2. A copper alloy for wind instrument reeds consisting of 20 to 25% by weight of tin, 0.2% by weight or less of lead, and the balance copper.