JPS584131Y2 - Shamisen neck connection mechanism - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a shaft connection mechanism for a shamisen.

The shamisen is generally divided into three parts: the upper azusa, the nakabo, and the lower azusa, which are used by connecting them together.

As a connecting means, a thin protruding body was integrally protruded from one side, and a hole was provided in the other side, and the protruding body was inserted into the hole to connect the two.

The most likely part of a shamisen to be damaged is the above-mentioned breakage of the protrusion, but once the shamisen is broken, it not only takes time to repair, but also requires skill to repair.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the conventional art, it is an object of the present invention to provide a shamisen neck connection mechanism that can be easily repaired by replacing the joint member.

An example in which the configuration of the present invention is applied to a synthetic resin pole will be described in detail based on the drawings.

As shown in Figure 1, the shaft A for the shamisen consists of the upper azusa 1 and the middle stick 2.
It consists of 3 lower legs.

First, the center rod 2 will be explained based on FIGS. 2 to 6. A cross-shaped metal center rib 4 is provided, and target locations on both ends of the center rod 4 are notched from the center in the longitudinal direction. This constitutes a reciprocal connecting portion 5.5.

Joint receivers 8.・・・
...... is fixed by welding.

As shown in FIG. 4, the joint receiver 8 is made of metal and has a bottom 9, and is formed into a tapered cylindrical shape with a smaller diameter on the bottom 9 side.

Joint receiver 8 for the backbone 4 configured as described above.・・・・・・
... is surrounded by a pole material 10 made of synthetic resin except for the open end.

When this rod material 10 is molded, a guide surface 11 is provided on the connecting portions 5, 5, and a tapered guide portion 12 with a wider width at the distal end is protruded from the center of the guide surface 11.

Then, the joints 13 are fitted and fixed into the joint receivers 8, 8 fixed to the tip surfaces 6, 6 on both sides, respectively.

The joint 13 is formed of wood into a tapered circular shape W whose diameter gradually decreases from the center toward both sides, and one end is fitted into the joint receiver 10 and fixed with an adhesive.

The upper part 1 is constructed as shown in FIGS. 7 to 9.

That is, like the center rod 2, an interdigitated connecting portion 15 is provided at one end of the metal backbone 14 formed in a cross shape.

Joint receivers 18 and 18 are fixed to the distal end surface 16 and the distal end surface 17 of both connecting portions 15 in the same manner as the husband and middle rods 2.

The entire circumferential surface of the backbone 14 constructed in this manner, except for the open side of the joint receiver 18.18, is surrounded by a rod material 19 made of synthetic resin.

In the molding process of surrounding the rod material 19, a guide surface 20 is formed on the connecting portion 15, and a tapered guide groove 21 with a wider width on the tip side is formed in the center of the guide surface 20, and a balance 22 is integrated on the opposite side. to mold.

Then, the joint 23 is attached to the joint receiver 18 on the tip side in the same way as the middle rod 2.
Insert and fix.

The lower shaft 3 is constructed as shown in FIGS. 10 and 11.

That is, like the center rod 3, a connecting portion 25 is provided at one end of a short cross-shaped metal backbone 24.

Joint receivers 28 and 28 are fixed to the distal end surface 26 and distal end surface 27 of this connecting portion 25, respectively, in the same manner as the center rod 2.

Except for the open side of the backbone 240 and Heian 28.28 constructed in this manner, the entire circumference is integrally molded so as to be surrounded by a rod material 31 made of synthetic resin together with the monkey tail 29 and the body connecting member 30.

During this molding, a guide surface 32 and a tapered guide groove 33 with a wider width at the tip end are formed in the center of the guide surface 32 in the connecting portion 25.

Then, the joint 34 is fitted and fixed into the joint receiver 28 on the distal end side.

The upper rod 1, middle rod 2, and lower rod 3 configured as described above are connected as follows.

That is, one guide portion 12 of the middle rod 2 is inserted into the guide groove 33 of the lower rod 3.
are fitted and slid, and the mutual joints 13.34 are respectively inserted into the mating joint receivers 8.34. ．． 2B.

Also, by fitting the guide groove 21 of the upper rod 1 with the other guide part 12 of the middle rod 2 and sliding it, the mutual joints 13, 23
The husband and husband fit into the joint receivers 3 and 18 on the other side.

The rods A are connected to each other as described above, and since the connections are made by the respective tapers, they are strongly connected.

In addition, in the above embodiment, it was explained that the joint holders were fixed to the backbones and then molded with synthetic resin rod material.
This is to facilitate molding, and instead of fixing the joint receiver to the backbone, it may be molded integrally with the rod material, keeping it in that position.

Further, after molding, the joint holder may be inserted and fixed in the hole in the rod material.

Further, in the above embodiment, a synthetic resin pole was described, but it goes without saying that the present invention can also be applied to a conventionally used wooden pole.

The joint and the joint receiver are not limited to circular shapes, but may also be square shapes.

Since the present invention is constructed as described above, one side of the joint is fitted and adhered to the metal joint holder, so there is no risk of it coming off and getting lost when not in use.

Since the joint holder is made of metal and the joint is made of wood, the joint holder will not wear out even if used frequently, and can be used for a long period of time.

In addition, since the coupling is performed by a taper, the coupling can be strong, and since they are in close contact with each other, there is no loss in sound propagation.

Furthermore, even if the joint is damaged, it can be easily replaced.

[Brief explanation of drawings]

The figures show an embodiment of the shamisen rod connection mechanism according to the present invention, in which Fig. 1 is a perspective view showing the assembled state, Fig. 2 is a plan view with the center part of the rod cut away, and Fig. 3 is Its side view, Fig. 4 is a partially enlarged sectional view, Fig. 5 is a sectional view taken along the ■-V line in Fig. 2,
Figure 6 is a sectional view taken along the line ■■ in Figure 2, and Figure 7 is a partially cutaway plan view of the upper Azusa. Figure 8 is a side view, Figure 9 is a front view, Figure 10 is a partially cutaway plan view of the lower shaft, and Figure 1.
Figure 1 is a side view thereof. In addition, in the figure, 5, 15.25 are connecting parts, 6, 16° 26 are tip surfaces, 7, 17, 27 are distal surfaces, 8, 18° 28 are joint receivers, and 13, 23.34 are joints. .

Claims (1)

[Scope of utility model registration request] A notched connecting part is provided at the end of the shaft, and a metal joint holder with a tapered hole is inserted and fixed into the tip and end faces of this connecting part, respectively, and the mating part is inserted into the joint holder on the tip side. A shamisen neck connection mechanism that consists of a wooden joint that is fitted into a tapered shape on both sides with the fitting part protruding.