JP2006330014A - Taisho koto - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a Taisho koto whose tone and sound volume are clear and large enough for musical performances in a music hall etc. <P>SOLUTION: The Taisho koto 1 has a supporting member 5 fixed to the flank of a sound box 2 on one end side and a lower bridge 8 and a hand rest 4 fixed on the other end side. Then a unit body 3 has one end side fixed in contact with the top surface of the supporting member 5 and the other end side extended to above the sound box 2. A specified gap is formed between the lower surface of the unit body 3 and the top surface of the sound box 2 to space the both apart from each other. The sound body 2 is formed swelling on both the sides of the unit body 3, which is provided with a peg part 32, an upper bridge 33, and a key operation mechanism 34. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a Taisho koto.

  A conventional Taisho koto is provided with a bobbin winding device for winding one end of a string and an upper piece for supporting the string on one end of the upper surface of a rectangular resonator body, and the other end of the string is locked to the other end of the upper surface. A string lock member and a lower piece for supporting the string are provided, and the tension of the string stretched between the upper piece and the lower piece is adjusted by a bobbin winding device to tune to a predetermined sound (for example, G sound). The sound is generated by plucking with a pick (prosthetic armor) at a performance position close to. A fingerboard with a fret is provided at a predetermined position below the string stretched between the upper piece and the lower piece, and the string is pressed against the fingerboard by pressing a key. Thus, a predetermined scale is generated.

In such a conventional Taisho koto, improvements have been made to make the sound generated by the plucked string greatly resonate with a clean tone. For example, Patent Document 1 describes that a plurality of sleeper pieces are provided on the lower surface of the fret plate and the fret plate is fixedly spaced from the surface of the resonance cylinder. Patent Document 2 describes that the fret plate is supported through a fret plate support member made of a vibration-proof material in order to separate the fret plate from the upper plate of the resonance cylinder.
Japanese Utility Model Publication No. 1-113295 JP-A-8-221056

  In the above-mentioned patent documents, the fret plate is separated from the upper plate so as not to disturb the vibration of the upper plate of the resonance cylinder. However, since the sleeper pieces and the fret support members are fixed to the resonance cylinder, Is not completely separated from the upper plate, and the upper plate is still not sufficiently vibrated.

  In addition, the traditional Taisho koto has been developed mainly as a musical instrument for educational purposes in order to incorporate and spread Western music in music education since the Meiji Restoration. Little has been done. For this reason, in order to perform at a music hall or the like, a device such as a pickup or an amplifier is attached to the Taisho koto, and the performance is performed by electrically increasing the performance.

  Accordingly, an object of the present invention is to provide a Taisho koto with a clean tone color and volume that can be played in a music hall or the like.

  The Taisho koto according to the present invention includes a unit body in which a bobbin portion is provided on one end side and an upper piece, a fingerboard portion, and a key-key operation mechanism are arranged and fixed on the upper surface, and the unit body is disposed on one end side. A support body for mounting and fixing, and a resonance cylinder having a lower piece and a string locking member provided on the other end side, and one end portion locked and fixed to the string locking member and the other end side And a plurality of strings arranged around the upper piece and the lower piece, and the resonance drum swells on both sides of the unit body in the arrangement direction of the strings. The unit body has a large width, and the unit body extends above the resonance cylinder so that the other end is set with a predetermined distance from the lower piece, and the lower surface of the unit body is the string. The resonance cylinder is extended to a position exceeding half of the total length of the resonance cylinder in the tensioning direction. Wherein the spaced apart. Furthermore, the resonance cylinder is formed so as to swell in the same shape on both sides of the unit body in the arrangement direction of the strings. Furthermore, the unit body is characterized in that the lower surface is curved so that both sides are thicker than the center in a portion separated from the resonance cylinder. Furthermore, a hand stand is provided so as to cover the string from the lower piece to the string locking member, and one end is fixed to a side surface of the resonance drum.

  By having the configuration as described above, the bobbin winding unit, the upper piece, the fingerboard unit, and the key key operating mechanism are unitized to form a unit body, and the unit body is mounted on the support portion provided on one end side of the resonance cylinder. Because it is fixed and the lower surface is placed away from the resonance cylinder, it is possible to eliminate those that come into contact with the resonance cylinder and interfere with vibration as much as possible, and make a clean tone from the resonance cylinder sound large and long. Can do.

  The unit body is extended above the resonance cylinder so that the other end is set at a predetermined distance from the lower piece, and the lower surface thereof is half the full length of the resonance cylinder in the string extending direction. If it is separated from the resonance cylinder up to a position exceeding 1, the resonance cylinder can be set large in the string extending direction. In other words, since the length between the lower piece and the upper piece is determined by the pitch of the open string, in order to set the resonance cylinder large, it is necessary to expand below the unit body, In the case of the present invention, the resonance cylinder can be easily enlarged because it is unitized as described above. If the lower surface of the unit body is separated to a position exceeding half of the entire length of the resonance cylinder in the string extending direction, the influence on the vibration of the resonance cylinder can be suppressed.

  Also, by setting the width of the resonance cylinder so as to swell on both sides of the unit body in the string arrangement direction, it is possible to generate a rich tone and volume sufficient to withstand performance in a music hall or the like. Like a conventional Taisho koto, with a rectangular parallelepiped and slender resonator body, if you want to increase the volume, you have to play the string strongly, so noise will be mixed and the timbre will deteriorate, but by configuring it like this invention Because the volume is increased by the resonance drum, it is possible to perform delicate performances with emphasis on timbre.

  Then, the lower surface of the unit body is curved so that both sides are thicker than the center part in the part spaced from the resonance cylinder, so that the strength of the unit body is improved and the key key is operated by the key key operating mechanism. Even when pressed, deformation such as bending of the unit body can be suppressed. In particular, the key-key operating mechanism mounted on the unit body is heavy and needs to be reinforced to sufficiently support it.

  In addition, a hand holding table is provided so as to cover the string from the lower piece to the string locking member, and one end is fixed to the side surface of the resonance drum, so that the hand holding the pick is placed on the table. Therefore, the hand does not come into contact with the resonance cylinder, and the hand table is fixed to the side surface of the resonance cylinder, so that the vibration on the upper surface of the resonance cylinder is not affected.

  Hereinafter, embodiments according to the present invention will be described in detail. The embodiments described below are preferable specific examples for carrying out the present invention, and thus various technical limitations are made. However, the present invention is particularly limited in the following description. Unless otherwise specified, the present invention is not limited to these forms.

  1 and 2 show a plan view and a side view of an embodiment according to the present invention. The Taisho koto 1 has a support portion 5 fixed to a side surface on one end side of the resonance drum 2 and a table 4 fixed to the other end side. The unit body 3 is fixed so that one end side is in close contact with the upper surface of the support portion 5, and the other end side extends above the resonance body 2. A gap 6 having a predetermined interval is formed between the lower surface of the unit body 3 and the upper surface of the resonance cylinder 2 so that the two are separated from each other.

  The resonance cylinder 2 is formed such that an upper plate 2a and a lower plate 2b swell in a virtue manner, and a side plate 2c having a predetermined width is bonded to the peripheral portions of the upper plate 2a and the lower plate 2b. The upper plate 2a, the lower plate 2b, and the side plate 2c are made of a thin wooden plate, and the side plate 2c is formed in a curved shape in accordance with the swelled peripheral edges of the upper plate 2a and the lower plate 2b. Therefore, a cavity along the outer shape of the upper plates 2a and 2b is formed inside the resonance cylinder 2. The shape of the upper plate 2a and the lower plate 2b may be a shape other than a virtue shape, for example, a diamond shape or a bowl shape, as long as the shape is swelled.

  In the unit body 3, a rectangular opening 31 is formed on one end side of a thick wooden rectangular base 30, and a bobbin 32 is installed and fixed in the opening 31. The bobbin 32 may be the same as a known one, and one end of each of the three strings 7 is wound around a winding bar, and the winding bar is rotated by a knob so that the string 7 Adjust the tension applied to the. Adjacent to the bobbin 32, an upper piece 33 and a key / key operating mechanism 34 are sequentially arranged and fixed on the upper surface of the base 30. In the key key operating mechanism 34, a plurality of key keys 35 are arranged in the extending direction of the string 7, and these key keys 35 can be moved up and down on a key support portion 36 extending in the extending direction of the string. It is supported by. The key support portion 36 is fixed to the lower surface of the top plate 37, and both end portions in the longitudinal direction of the top plate 37 are fixed to a predetermined height by a pair of attachment members 38 erected on the base 30. And below the key support part 36, it adheres and is fixed to the upper surface of the base 30 so that the strip | belt-shaped finger board 39 may oppose on both sides of the string 7. FIG. The key key 35 supported by the key support portion 36 is held at a position where it does not contact the string 7, but when the key key 35 is pressed, the string 7 is pressed between the key key 35 and the finger plate 39. It will be pinched. A plurality of frets are provided on the fingerboard 39 at positions where the string 7 vibrates at a predetermined pitch (length starting from the lower piece 8). The pressure contact position on the plate 39 is positioned between these frets. Therefore, when the key key 35 is pressed, the string 7 is pressed and a sound based on the string length of the corresponding fret can be played. The structure of such a key / key operating mechanism is the same as a known one.

  The support portion 5 fixed to the resonance cylinder 2 is made of wood and is L-shaped, and its upper surface is set to be flush with the upper plate 2 a of the resonance cylinder 2. The lower surface of the base 30 on which the bobbin winding portion 32 is disposed is bonded and fixed to the upper surface of the support portion 5.

  The lower piece 8 is placed on the upper surface of the upper plate 2a of the resonance drum 2 at a position spaced apart from the other end of the unit body 3, and the string having one end wound around the bobbin 32 7 engages with the upper end of the upper piece 33, passes through the key key operating mechanism 34, and engages with the upper end of the lower piece 8. The other end of the string 7 engaged with the lower piece 8 is locked to a string locking member fixed to the side surface of the resonance drum 2 at the base portion of the hand rest 4.

  Accordingly, the three strings 7 are arranged between the upper piece 33 and the lower piece 8 in parallel with each other at equal intervals. Then, at the performance position between the unit body 3 and the lower piece 8, the string 7 is played by playing with a pick. Crescent sound ports 20a and 20b are formed in the upper plate 2a of the resonance cylinder 2 so as to surround the performance position, and the tone of the sound emitted from the vibration of the resonance cylinder 2 is enriched. The shape of the sound opening is not limited to a crescent shape, and may be appropriately changed according to the acoustic characteristics of the resonance cylinder 2.

  The hand table 4 is a wooden plate-like body formed so that the root portion is bent, and the tip extends to a position close to the lower piece 8. The root portion is fixed to the side surface of the resonance cylinder 2. In addition, a rectangular opening is formed in the root portion, and the above-described string locking member is disposed.

  3 and 4 are respectively a cross-sectional view taken along line AA and a cross-sectional view taken along line BB in FIG. Inside the resonance cylinder 2, a rod-shaped soul column 21 is disposed immediately below the set position of the lower piece 8. The soul column 21 is held in pressure contact between a reinforcing bar 22 bonded and fixed to the lower surface of the upper plate 2a and a reinforcing bar 23 bonded and fixed to the upper surface of the lower plate 2b. By providing the soul column 21, the vibration of the string 7 propagates from the lower piece 8 to the upper plate 2a and the lower plate 2b, and the entire resonance drum 2 vibrates to produce a richer volume and tone.

  A gap 6 is formed between the upper plate 2 a of the resonance cylinder 2 and the base 30 by removing the lower surface of the base 30 by a predetermined thickness. The range in which the gap 6 is formed may be set so that the length d up to the range in which the gap 6 is formed exceeds L / 2, where L is the total length of the resonance cylinder 2 in the extending direction of the string 7. By setting the formation range of the gap 6 in this way, it is possible to suppress the influence of the resonance cylinder 2 from the base 30 and perform sufficient vibration. Furthermore, preferably, if the ratio of the golden ratio is set (L / d = 1.618...), The resonance of the resonance cylinder 2 can be sufficiently performed. If sufficient strength of the base 30 is obtained, the gap 6 may be formed over the entire length of the resonance cylinder 2.

  As shown in FIG. 3, the hand rest 4 has a slightly curved portion covering the string 7 so that the hand can be smoothly moved during the performance. A stop member 9 is provided.

  As shown in FIG. 4, the key support portion 36 of the key key operating mechanism 34 includes a shaft support portion 36a that rotatably supports the base end portion of the operation bar 35a of the key key 35, and a guide portion 36b that guides the operation bar 35a. The shaft support portion 36a is urged by a coil spring or the like so that the operation bar 35a is positioned upward. In the guide portion 36b, a guide groove that guides the movement of the operation bar 35a in the vertical direction is formed. Therefore, when a finger is placed on the key button 35 b of the key key 35 and pressed, the operation bar 35 a is lowered to press the string 7 on the finger plate 39.

  A wooden reinforcing plate 40 is adhered and fixed between the top plate 37 and the base 30 in the longitudinal direction of the top plate 37 on the side opposite to the side where the key keys 35 are arranged. In addition, the lower surface of the base 30 is curved and formed in an arch shape so that the thickness of both side portions 30a is thicker than the thickness of the central portion 30b in the portion where the gap 6 is formed. In order to support the weight of the mechanism 34 or to press the key 35, the strength is improved so that the base 30 is not deformed by pressure during performance.

  In order to improve the strength of the unit body 3, as shown in the sectional view of the unit body 3 in FIG. 5, a metal reinforcing plate 41 is provided so as to surround the entire length in the longitudinal direction of the finger plate 39, or the reinforcing plate 40. Further, a metal reinforcing plate 42 may be provided. By performing such reinforcement, a performance can be performed in a stable state even in a structure in which the unit body 3 and the resonance cylinder 2 are separated by the gap 6.

  As described above, the Taisho koto according to the present invention has a structure in which the unit body 3 and the hand table 4 are separated from the resonance cylinder 2 so that the resonance cylinder 2 is not disturbed and the resonance cylinder 2 is enlarged. Therefore, a richer tone color and volume can be obtained, and it is suitable as a musical instrument used for performance in a music hall or the like.

It is a top view regarding the embodiment concerning the present invention. It is a side view regarding the embodiment concerning the present invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is sectional drawing of a unit body.

Explanation of symbols

1 Taisho Koto 2 Resonance drum 3 Unit body 4 Hand rest 5 Support section 6 Gap 7 String 8 Lower piece 9 String locking member
30 base
32 Bobbin
33 Upper piece
34 Key-key operation mechanism
39 Fingerboard

Claims (4)

  A unit body in which a bobbin part is provided on one end side, and an upper piece, a finger plate part, and a key key operating mechanism are arranged and fixed on the upper surface, and a support part for placing and fixing the unit body on one end side are provided. And a resonance drum provided with a lower piece and a string locking member on the other end side, and one end portion is locked and fixed to the string locking member, and the other end side is wound by the bobbin winding portion. A plurality of strings arranged in a stretched manner between the upper piece and the lower piece, and the resonance cylinder is set to have a large width so as to swell on both sides of the unit body in the arrangement direction of the strings. The unit body is extended above the resonance cylinder so that the other end is set at a predetermined distance from the lower piece, and the lower surface of the unit body is the resonance cylinder in the string extending direction. It is separated from the resonance cylinder to a position exceeding half of the total length of the Taishogoto to.   The Taisho koto according to claim 1, wherein the resonance drum is formed so as to swell in the same shape on both sides of the unit body in the arrangement direction of the strings.   The Taisho koto according to claim 1 or 2, wherein a lower surface of the unit body is curved so that both sides thereof are thicker than a center portion in a portion separated from the resonance cylinder.   2. A hand stand provided to cover the string from the lower piece to the string locking member and having one end fixed to a side surface of the resonance drum. Taisho koto according to any one of 3 above.

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