JP3088691B2 - Reverberation intensifier and drum with this - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reverberation intensifier for maintaining the reverberation of a drum for a long time, and a drum equipped with the reverberation.
In particular, it relates to large drums.

[0002]

2. Description of the Related Art There are various types of drums, and a typical one is a large drum. Depending on the purpose of use, there are different types of drums and the shape of the torso and the ratio of the torso diameter to the torso length. In each case, leather is attached to both ends of the torso formed of a wooden tube, and the edge of this leather is fastened to the wooden tube It is fastened and fixed with a string.

[0003] A large drum usually vibrates by hitting a leather surface stretched over the body end with a pawl, and produces a loud sound using the drum and the inside of the drum surrounded by the leather surface as a resonance box. In addition, the vibration of the leather surface struck by the tongue gradually attenuates, but this damped vibration also resonates inside the drum, and the lingering sound continues until the vibration of the leather surface stops.

[0004] The damped vibration of the leather surface is a surface vibration, which consumes more energy than the vibration of strings of a piano, a koto, etc.
And since the specific mass of the leather is not so large, it decay relatively quickly. Therefore, the lingering sound of the drums rapidly diminishes and does not last very long.

[0005] It is an object of the present invention to provide a lingering intensifier that can maintain the lingering sound of a drum for a long time, and a drum that can maintain the lingering sound for a long time.

[0006]

In order to solve the above-mentioned problems, a reverberation intensifier according to the present invention comprises two strip-shaped metal vibrators having the same dimensions and a metal fitting for mounting the vibrators. The bracket is formed of a base mounted on the inner peripheral surface of the drum drum, a pillar standing on the base, and two mutually parallel arms branching from the tip of the pillar. One end of each of the two vibrators is fixed to each end, and the front and back surfaces of these vibrators are arranged parallel to each other.

Further, in the drum of the present invention, one or more of the reverberation intensifier are mounted on the inner peripheral surface of the drum with the front and back surfaces of the strip-shaped metal vibrator parallel to the leather surface of the drum drum end. That is why the configuration was adopted.

That is, two metal vibrators having a strip shape and the same dimensions are attached to the inner peripheral surface of the drum with metal fittings so as to be parallel to the leather surface of the drum. The vibration of the leather surface is transmitted to a metal vibrator whose specific mass is large and hard, so that the vibration is hardly attenuated, and the vibration energy stored in this vibrator is gradually released to maintain the lingering sound of the drum for a long time is there.

The vibrator is formed in a strip shape, and its front and back surfaces are arranged in parallel with the leather surface of the drum, because the surface of the strip-shaped vibrator is directed in the direction of vibration of the leather surface, and the vibration from the leather surface is efficiently performed. The reason why the two transducers are made to have the same dimensions is to make the natural frequencies of the transducers the same and to make it difficult to attenuate the vibrations of these transducers by the resonance effect. It is.

The vibrator is made of a special steel strip having a carbon content of 0.6% or more, and one end of the vibrator is fixed to each end of the arm using a caulking member made of copper. The material can be made of a hard material having a high elasticity limit to further enhance the continuity of vibration, and the caulking portion is fixed tightly with ductility copper without any gap, thereby preventing loss of vibration energy due to backlash of the caulking portion. Can be. Further, the copper is hardened when caulking, and the caulked portion can be stably held, and the caulked portion can be prevented from loosening due to large vibration when the drum is hit.

According to the size of the drum, two or more of these reverberation intensifiers can be mounted. In this case, in order to efficiently transmit the vibration of the leather surface hit with the toe to these reverberation intensifiers, To some extent in the axial direction of the drum,
It is desirable to attach the drum to different positions in the inner circumferential direction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
An embodiment of the present invention will be described.

FIG. 1 shows an embodiment of the reverberation intensifier. This reverberation intensifier 1 is composed of a metal fitting 2 formed by welding a steel plate, and two vibrators 3 formed only of carbon tool steel SK5 (carbon content 0.83%) with a strip steel. .

The metal fitting 2 is formed of a base 4, a column 5 erected on the base 4, and two parallel arms 6 branching off from the tip of the column 5. A mounting hole 7 is provided for mounting the metal fitting 2 on the inner peripheral surface of the drum.

Each of the vibrators 3 has a rectangular shape with the same dimensions, and the front and back surfaces thereof are parallel to each other.
One end is fixedly attached to the tip of the arm section 6 by a copper caulking member 8.

The fixing of the vibrator 3 may be performed by welding or spot welding. However, when the vibrator 3 is made of carbon tool steel, it is not preferable because the weldability is poor.

FIG. 2 shows an embodiment of a large drum. This drum has a barrel 9 in the shape of a beer barrel, the length of which is larger than the diameter, and leather 10 stretched on both ends of the barrel 9 at its edge.
It is of the type glued to the end and fastened with studs 11, and the three above-mentioned reverberation intensifiers 1 a, 1 b,
1c is attached with a screw 12.

The reverberation intensifiers 1a, 1b, and 1c are arranged at equal intervals in the drum length direction of the drum, and the reverberation intensifiers 1a and 1c at both ends of the drum length direction are arranged in the same circumferential direction on the inner peripheral surface. Attached to the position, the afterglow intensifier 1b at the center of the trunk length direction,
It is attached at a position shifted by 180 ° in the circumferential direction from these reverberation intensifiers 1a and 1c. In addition, since the inner peripheral surface at the attachment position of the reverberation intensifiers 1a, 1c at both ends is inclined in the body length direction, the strip-shaped vibrator 3
In order to make the front and back surfaces of the
Column portion 5 stands upright with respect to the base portion 4. The metal part 2 of the reverberation intensifier 1b at the center has a pillar 5 standing upright on the base 4.

In this embodiment, a large drum having a trunk length larger than the diameter has been described. However, in the case of a drum having a trunk diameter larger than the length dimension, the same position in the longitudinal direction of the drum is required. A plurality of reverberation intensifiers can be radially mounted on the vehicle.

[0020]

As described above, the reverberation intensifier of the present invention comprises two strip-shaped metal vibrators having the same dimensions and being parallel to the leather surface of the drum on the inner peripheral surface of the drum. The vibration of the leather surface struck by the brace is efficiently transmitted to the metal vibrator, which has the same dimensions and the same natural frequency, because the specific mass is large and hard, so the vibration is hardly attenuated. By delaying the attenuation of the vibration energy stored in these vibrators due to the resonance effect of the metal vibrator, and gradually releasing the vibration energy, the reverberation of the drum can be maintained for a long time. Further, the vibrator is made of special steel strip having a carbon content of 0.6% or more, and one end of the vibrator is fixed to each end of the arm portion using a copper caulking member, whereby the material of the vibrator is formed. The rigidity is high and the elastic limit is high, so that the durability of vibration can be further enhanced, and the caulked portion is tightly fixed with a ductile copper with no gap, and the loss of vibration energy due to the play of the caulked portion can be prevented. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a reverberation intensifier.

FIG. 2 is a partially cutaway front view showing an embodiment of a drum.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1c Reverberation lengthening device 2 Metal fitting 3 Vibrator 4 Base part 5 Column part 6 Arm part 7 Hole 8 Caulking member 9 Body 10 Leather 11 Tack 12 Screw

Claims (3)

(57) [Claims] The present invention comprises a strip-shaped metal vibrator having the same dimensions as each other and a metal fitting for mounting the vibrator, the metal fitting having a base mounted on the inner peripheral surface of a drum drum, and a standing part mounted on the base. One end of each of the two vibrators is fixed to each of the end portions of the arm portion, and one end of each of the two vibrators is fixed to each of the end portions of the arm portion. A reverberation intensifier with its front and back sides arranged parallel to each other. 2. The method according to claim 1, wherein the metal vibrator has a carbon content of 0.6%.
2. The reverberation intensifier according to claim 1, which is formed of a special steel strip, and one end of which is fixed to each end of the arm portion using a caulking member made of copper. 3. The reverberation intensifier according to claim 1 or 2, wherein the metal vibrator in the form of a strip is arranged on the inner peripheral surface of the drum in parallel with the leather surface of the drum drum end. One or more taiko drums.