JP2008052054A - Acoustic guitar based stringed instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate adjustment of tones while lightening an acoustic guitar based stringed instrument and improving the tones. <P>SOLUTION: Bracings 5a, 5b, 6a 6b, 18 with pierce holes 11, 11a to 11e opened are stuck on the inside face of a flat top 1 and/or on the inside face of a back board 2 of the fuselage. Also, the tones performed from the acoustic guitar based stringed instrument are adjusted by changing a size, a shape of the pierce holes or the number thereof opened in the bracings. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an acoustic guitar type stringed musical instrument such as a classical guitar or a folk guitar, and more particularly to a power wood disposed in a body of the acoustic guitar.

The body of a guitar is generally reinforced by arranging a hardwood on the inner side surface of the front plate and the inner side surface of the back plate with an adhesive so as not to be deformed by the tension of the strings. Further, this power tree is known to be an important member that also affects the acoustic characteristics of the guitar, as shown in Patent Documents 1 and 2 below.
JP-A-11-85143 JP 2001-236058 A

By the way, from the viewpoint of reinforcing the body, it is desirable to provide a large number of large and strong ones in the vertical and horizontal directions. However, in this case, not only does the weight of the guitar become heavy and the performance is impaired, but also the sound is poor. Therefore, there is a problem that a preferable tone as a guitar may not be obtained.
Therefore, it is necessary to decide the thickness and arrangement of the power tree according to the material and nature of the wood that makes up the body, or the tone required by the musician, but there are many ways to make such adjustments for individual guitars. It took a lot of time and a special skill. For this reason, it was the situation where cost became high.
The present invention seeks to solve such problems of conventional acoustic guitar stringed instruments.

For this purpose, the acoustic guitar-type stringed instrument of the present invention is characterized in that a power wood having a through hole is attached to the inner side surface of the front plate and / or the inner side surface of the back plate.
Further, the present invention is characterized in that, in the above acoustic guitar type stringed instrument, a plurality of through holes are provided at appropriate intervals in the longitudinal direction of the power tree.
In addition, the method for adjusting the tone color of an acoustic guitar type stringed instrument according to the present invention adjusts the tone color by changing the size, shape, or number of through holes provided in Riki.

  According to the present invention, there is a remarkable effect of reducing the weight and improving the timbre of an acoustic guitar stringed instrument, and the adjustment of the timbre is facilitated, so that it is possible to easily meet the demands of individual musicians for the timbre. .

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a body of a guitar according to the present invention. 1 is a front plate made of a single plate such as spruce, 2 is a back plate made of a single plate such as mahogany, and 3 is a side plate curved in a curved shape. The periphery of the front plate 1 and the back plate 2 is joined to the side plate 3 via the joint plate member 4, so that the body is formed in a hollow shape, and a guitar is provided by providing a saddle (not shown) on the body. Composed.

As shown in FIG. 2, longitudinal bar-shaped force bars 5 a and 5 b are attached to the inner side surface of the front plate 1 so as to cross in an X shape at the center. Shorter bar-shaped power trees 6a and 6b are attached in parallel. In addition, as shown in the exploded perspective view in FIG. 3, the power trees 5a and 5b are combined in an X shape by forming U-shaped cuts 7a and 7b that can coincide with each other substantially in the middle in the longitudinal direction. In addition, the two end portions 8a, 9a, 8b, and 9b are thinly cut so as to be engaged with the joint plate member 4. Then, glue is used as an adhesive and is adhered to the inner surface of the front plate 1. Reference numeral 10 denotes a piece of cloth applied with an adhesive and affixed on the intersection of the power trees 5a and 5b, and the two power trees 5a and 5b are firmly combined with each other.
Then, a plurality of through holes 11 are provided at appropriate intervals in the longitudinal direction in the force woods 5a and 5b and the force woods 6a and 6b, thereby reducing the weight of the force wood without losing its strength and rigidity. To be.

Further, 12 is a sound hole formed on the front plate 1, 13 is a timber attached to the upper part of the sound hole, and 14 is a thin reinforcement attached to the upper part of the reinforced tree 13 in parallel with the force tree. Plates 15a to 15c are thin reinforcing plates attached so as to surround the sound hole, 16 is a reinforcing plate attached to the inner surface of the string mounting portion of the front plate 1, and 17 is other short force wood.
In addition, the timber 18 is suitably affixed also to the inner surface of the back plate 2 as illustrated in FIG.

  As described above, the guitar according to the present invention has the through holes 11 formed in the power trees 5a, 5b, 6a, and 6b. Since it propagates freely, the loss of sound is improved and the sound is also improved.

  In addition, by appropriately adjusting the size and shape of the through holes 11, or the interval and number of the through holes 11, the musician's favorite tone such as soft sounds and hard sounds can be adjusted relatively easily. Become. That is, it is possible to adjust the sound more easily than to adjust the timbre depending on the material of the body of the trunk, and to obtain a desired timbre.

  4 is an example in which large through holes 11a and small through holes 11b are alternately formed. FIG. 5 shows an example in which elliptical through-holes 11c and 11d are alternately formed so as to be vertically long and horizontally long. FIG. 6 shows a truss shape by alternately forming triangular through-holes 11e in the vertical direction so that the bending strength of the timber does not drop even when the aperture ratio is increased.

  The present invention can be widely applied not only to classical guitars and folk guitars but also to small guitars whose production has been increasing in recent years, or acoustic guitar type stringed instruments such as ukuleles.

The longitudinal cross-sectional view of the trunk | drum of the guitar which concerns on this invention. The perspective view of the inner surface of the front board of the guitar which concerns on this invention. The disassembled perspective view of the power tree which concerns on this invention. The perspective view which shows other embodiment of the power tree which concerns on this invention. The perspective view which shows other embodiment of the power tree which concerns on this invention. The perspective view which shows other embodiment of the power tree which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front plate 2 Back plate 3 Side plate 5a, 5b, 6a, 6b, 18 Rikigi 11, 11a-11e Through-hole

Claims (3)

  An acoustic guitar-type stringed instrument characterized in that a power tree with through holes is attached to the inner surface of the front plate of the fuselage and / or the inner surface of the back plate.   2. The acoustic guitar type stringed instrument according to claim 1, wherein a plurality of through holes are provided at appropriate intervals in the longitudinal direction of the force tree.   A method for adjusting the tone of an acoustic guitar-type stringed instrument, wherein the tone is adjusted by changing the size, shape, or number of through holes established in Riki.

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