JP7154031B2 - Yokobue and its manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a transverse flute and a manufacturing method thereof.

Traditionally, flutes have been mass-produced using cylindrical bodies made of metal such as aluminum or plastic, which are designed and manufactured directly based on empirical rules without using natural bamboo (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2002-132253

However, the yokobue, whose main body is made of a conventional synthetic resin tube, is said to be far inferior to so-called one-piece bamboo flutes in terms of timbre, tone quality, richness of sound, and expressiveness of sound. I had a problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a transverse flute and a method of manufacturing the flute, which can produce an excellent audible sound even in a mass-produced transverse flute using a synthetic resin material.

In the transverse flute according to the present invention, a first half-split pipe and a second half-split pipe are combined, and a reflection wall is provided near the pipe head of the pipe body in which the inner pipe wall is tapered toward the bottom side of the pipe. The first half-cylinder has a mouthpiece and a plurality of finger holes of appropriate size between the location of the partition and the bottom of the tube. It is characterized by being arranged and provided at a position.

According to the method of manufacturing a transverse flute according to the present invention, a bamboo reference model transverse flute is produced from natural bamboo in a one-off production manner, and this bamboo reference model transverse flute is composed of a first half-split tube having a mouthpiece and each finger hole, and a second half-cylinder. It is divided vertically into two half-cylinders, and the overall shape including the first half-cylinder, the second half-cylinder, and the divided end faces of each is measured, and each metal is measured. Data for making the mold is taken, and data of the concave and convex shape that can be combined with the split end faces and the positioning and sealing are added. Two types of resin molding molds are made for the side and the second half-cylinder side, and resin is injected into this resin molding mold to form the first half-cylinder side and the second half-cylinder side. It is characterized in that it is produced by applying an adhesive to each divided end surface and uniting them.

According to the present invention, it is possible to mass-produce flutes using a synthetic resin material, and to provide a flute capable of obtaining excellent audible sound with the finish obtained by single-item production.

1 is an overall perspective view of a transverse flute showing an embodiment of the present invention; FIG. Fig. 2 is an overall perspective view showing the first half-cylinder viewed from the inside; FIG. 4 is a partial perspective view showing a state in which the first half-cylinder is viewed from the tube head side; FIG. 10 is a partial perspective view showing the state of the second half-cylinder as viewed from the tube head side;

The invention will now be described with reference to the accompanying drawings showing embodiments thereof.

A transverse flute 1 shown in FIG. 1 is formed by combining a first half tube 2 and a second half tube 3 which are split in the longitudinal direction.

As shown in FIG. 2, the horizontal flute 1 is provided with a partition wall 6 serving as a reflecting wall in the vicinity of the pipe head of the pipe body, the inner wall of which tapers toward the pipe bottom 4 side, so that the pipe bottom 4 is open. ing.

The first half-cylinder 2 shown in FIG. 2 is provided with a mouthpiece 7 and a plurality of finger holes 8 to 14 of appropriate sizes and arranged at appropriate positions between the partition wall 6 and the pipe bottom 4. ing.

In addition, on the inner cylinder wall 19 of the first half-cylinder 2 and the second half-cylinder 3, the mouthpiece 7 and the finger holes 8 to 14 of appropriate size and provided at appropriate intervals are shown in the drawing. not clearly expressed in However, between the partition wall 6, the mouthpiece 7, and the finger holes 8 to 14, the mouthpiece 7 and the finger holes 8 to 14, which are trimmed to achieve the optimum tone (pitch adjustment) by tuning and correspond to the volume, are included. The shape of the inner cylinder wall 19 is formed.

The partition wall 6 may be integrated with the first half cylinder 2 or may be inserted into the cut groove 17 separately.

The first half-cylinder 2 and the second half-cylinder 3 are made of synthetic resin, and the divided end faces 15 and 16 to be joined are formed with unevenness that meshes with each other.

The head portions of the first half-cylinder 2 and the second half-cylinder 3 are shown in FIGS. A terminal plug 5 is provided at the open end of the tube head portion to cover the terminal.

The terminal plug 5 may be integrated with either the first half-cylinder 2 or the second half-cylinder 3, or may be inserted into the cut groove 18 separately. Then, the first half-cylinder 2 and the second half-cylinder 3 are united with an adhesive applied to the divided end surfaces 15 and 16 to form the flute 1 as shown in FIG.

Here, as an example of a method for manufacturing a transverse flute, the following steps can be performed in order.

That is, cut the required length from a bamboo that seems appropriate, pull out the knots from the tube head to the tube bottom with a tool such as a sawing plane (not shown), and smooth the outer cylindrical part.

Using sandpaper with a handle (not shown), insert the inner cylinder wall 19 from the open end and scrape it smooth.

At this time, the diameter of the inner cylinder wall 19 is made substantially uniform, and the mouthpiece 7 is first formed to be slightly smaller than the position according to an empirical rule. Next, a plurality of finger holes 8 to 14 are formed with slightly smaller sizes at respective positions based on empirical rules. A partition wall 6, which is a reflecting wall, is formed on the tube head side, and the tube bottom side is tapered.

The size of the partition wall 6 and the mouthpiece 7, the size of the mouthpiece 7 and the first finger hole 8, and each of the finger holes 9 to 14 are increased, and the inner cylindrical wall 19 between them is shaved, and the pitch is adjusted while tuning each. The inner cylinder wall 19 as a whole is further tapered to a shape that provides an appropriate volume. A bamboo flute is made by shaving it with a planer with a handle and fine-tuning it while tuning it to produce the optimal sound.

This shinobue, which was formed by shaving with a plane with a handle, is used as a standard bamboo flute model for making a production mold.

This bamboo standard model flute is vertically divided into two halves, the first halved tube on the side where the mouthpiece and finger holes are located, and the second halved tube on the opposite side.

The entire shape of the first half-cylinder, the second half-cylinder on the opposite side, and the divided end faces of each are actually measured, and the data for manufacturing each mold is obtained.

For the purpose of ensuring firm positioning and improving the sealing performance when the first half-cylinder and the second half-cylinder are joined to the mating split end faces, data on the shape of meshing unevenness is added.

Based on these data, two types of production molds for resin molding are made for the first half-cylinder side and the second half-cylinder side through metal mold manufacturing drawings or directly by metal processing. This resin mold is for injection molding.

Resin is melted and injected into an injection molding mold consisting of a female mold and a male mold for the first half-cylinder to produce a large number of first half-cylinders 2 made of resin. Similarly, a large number of second half cylinders 3 made of resin are produced.

The synthetic resin used for molding the first half-split cylinder 2 and the second half-split cylinder 3 is ABS (Acrylonitrile Butadiene Styrene) resin, PP (Polypropylene) resin, or PE (Polyethylene) resin.

Any one of glass fiber, carbon fiber, bamboo fiber and carbonized bamboo powder may be kneaded with the synthetic resin. By mixing short fibers of bamboo fiber, carbon fiber, and glass fiber into resin at the time of manufacturing, texture, weight, color tone, and sound quality are affected. Also, a fine bamboo-like texture may be applied to the mold to produce a bamboo pattern.

In this way, the first half-cylinder 2 and the second half-cylinder 3 are molded in large quantities from synthetic resin using resin molding dies.

After that, arbitrary first half-cylinder 2 and second half-cylinder 3 are taken out from mass-produced, and adhesive is applied to the divided end faces 15 and 16 to be combined, respectively, and they are bonded and combined. , A resin flute with a barrel body is made.

As a result, the first half-split tube 2 and the second half-split tube 3 are united, and a partition wall 6 serving as a reflecting wall is provided near the tube head of the tube body whose inner wall tapers toward the tube bottom 4 side. is provided to open the pipe bottom 4, and the first half-cylinder 2 has a mouthpiece 7 and a plurality of finger holes 8 to 14 of appropriate size between the partition wall 6 and the pipe bottom 4. It can be a horizontal flute 1 that is arranged and provided at a position.

1 horizontal flute 2 first half-split tube 3 second half-split tube 4 pipe bottom 5 terminal plug 6 partition wall (reflecting wall)
7 mouthpieces 8, 9, 10, 11, 12, 13, 14 finger holes 15, 16 split end faces 17, 18 cut grooves 19 inner cylinder wall

Claims (2)

The first half-split tube and the second half-split tube are combined, and a partition wall serving as a reflecting wall is provided in the vicinity of the tube head of the tube body in which the inner tube wall tapers toward the bottom side of the tube. With the buttocks open,
A method for manufacturing a transverse flute, wherein the first half-split tube is provided with a mouthpiece and a plurality of finger holes of appropriate size and arranged at appropriate positions between the position of the partition wall and the end of the pipe. ,
Making a standard bamboo flute model productively from natural bamboo,
This bamboo standard model transverse flute is vertically divided into a first half-split pipe with a mouthpiece and each finger hole and a second half-split pipe,
actually measuring the first half-cylinder, the second half-cylinder, and the overall shape including the divided end faces of each, and obtaining data for manufacturing each mold;
Add the data of the concave and convex shape that can be positioned and sealed to be combined with the split end face,
Based on these data, two types of resin molds for the first half-cylinder side and the second half-cylinder side are made by performing mold processing through the mold manufacturing drawing or directly,
The first half-cylinder side and the second half-cylinder side are manufactured by injecting resin into these resin molding dies, and the respective end surfaces are coated with an adhesive to be combined. A method for manufacturing a transverse flute, characterized by: In the method for manufacturing a transverse flute according to claim 1,
A method for manufacturing a horizontal flute, wherein the first and second half-cylinders of the horizontal flute are made of synthetic resin, and are formed with concave and convex portions that mesh with each other on the divided end faces of the combined pipes.

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