JP2012150407A - Koto - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact koto has a register down to a lower register of at least 27.5 Hz or lower.SOLUTION: The koto includes a body 1 which has a head part 11 at one end and a tail part 12 at the other end; a plurality of strings 2 tensed between the head part 11 and the tail part 12; a head-side string support 3 protruded from an upper surface of the head part 11 to support the strings 2; a tail-side string support 4 protruded from the upper surface of the tail part 12 to support the strings 2; a bridge 5 mounted on the upper surface of the body 1 to support the tensed strings 2 at a suitable position and to vary intervals; a one-end lock mechanism 6 provided to one of the head part 11 and the tail part 12 and locking one-end sides of the strings 2; and a tension adjusting lock mechanism 7 provided to the other of the head part 11 and the tail part 12, and locking other-end sides of the strings 2 and adjusting tension of the strings 2. The strings 2 are metallic, and the body 1 is 150 cm or less long and has its register down to the lower register of 27.5 Hz or lower.

Description

  The present invention relates to a kite that is one of the traditional Japanese musical instruments, and more particularly to a kite that is in charge of accompaniment and bass.

  In general, the thirteenth spear with thirteen spears is referred to as a “spear”, which is responsible for the main melody and the high frequency range. On the other hand, the seventeenth song that has 17 pieces designed by Michio Miyagi to take charge of accompaniment and low frequency range (frequency at least up to about 27.5 Hz) is called “17th song”. In addition, there are twenty-eight, twenty-five-thousand, thirty-nine-thousand, and thirty-two-thousands.

  A conventional kite is formed using paulownia and the like for the trunk, and Karagi or the like for the crown (head) and the tail (tail). For example, the length of a kite with 13 kites is about 180 cm (six Measure) is standard, and the width is about 25 cm on the crown side. The length of the heel covering up to 17 low frequencies is about 210 cm (seven shaku), and the width is about 33 cm.

  Tsubaki is made of Tetoron (registered trademark), etc. 13, 17, 20, ... are stretched in parallel to the crown and tail through the stiletto, the player sits with the crown on the right, the thumb of the right hand, the index finger, The middle finger is played with a fingernail, and the left hand is used mainly to push the left side of the koto column to make the sound louder, and it is also used to make decorative sounds called hiiroiro.

  The conventional scissors have a structure in which a scissors are stretched over the top surface of a resonant box-shaped body that is made by punching the top surface and both side surfaces from a single material and bonding the bottom surface to another material. At both ends of the lower surface of the body, sound holes are formed to radiate resonance sound to the outside.

  Japanese houses generally have a six-cage (180 cm) high “襖” and a three-cage (90 cm) wide passage, and it is difficult to carry the above-mentioned conventional kite (180 cm, 210 cm) upright.

  Also, when carrying the kite to the performance hall by car, the longitudinal direction of the kite could not be changed to the vehicle width direction.

  Further, since the above-described conventional kite has a resonance box, it is necessary to perform the tuning and tuning of the kite through the sound hole on the lower surface, and it takes a long time to stretch and tune the kite.

  Recently, a small bag has been developed to solve the problem of the conventional bag (for example, see Patent Document 1). This small rod has a body as a single body plate and 13 Tetrons (registered trademark) stretched over the top surface of the body plate, and has a length of 80 to 120 cm.

JP 2002-23737 A

  The recently developed small kite is a thirteenth kite that is in charge of the main melody and the high frequency range, as described above, so the length could be shortened.

  By the way, the fundamental frequency F [Hz] of the string is expressed as follows.

F = (1 / 2L) (T / σ) ^1/2 (1)
Here, L is the string length [m], T is the tension [N], and σ is the mass per unit length (linear density) [kg / m].

From equation (1), when the tension is increased (T → Large), the sound is high (F → Large), and when the tension is decreased (T → Low), the sound is low (F → Low). It can be seen that the variable range of the tension T is narrow because the sound is broken when the tension is reduced and the tension is reduced. Therefore, if the length of the ridge is shortened (L → small) in order to reduce the size, it shifts to a high sound (F → large), and therefore it is necessary to make the ridge having a large linear density σ. However, polymer materials such as tetron and nylon have a low density of 1.12 g / cm ³ and must be thickened to increase the linear density σ. When the heel becomes thicker, it becomes difficult to play with the nail.

  From the above, there is a limit to shortening the length L of the ridge with the Tetron ridge, and the length of the conventional small ridge is considered to be 120 cm.

  Even if the length of a conventional small ridge is 80 cm, it is in charge of the main melody and the high frequency range, and cannot produce at least about 27.5 Hz or lower.

  Since the seventeenths are in charge of accompaniment and bass, they are 210cm long, and there is a high need for miniaturization from the viewpoint of transportation and performance place. If the length is shortened, the sound becomes high, so the sound must be thick, but it is too thick to satisfy the low sound range), which is difficult with the conventional small sound technique.

  In addition, the conventional small kite has a single body plate, so it is easy to handle and tune the kite, but it does not have a resonance box, so there is a problem that the tone and sound of the sound are poor. .

  The present invention has been made in view of the above-described problem of the conventional small-sized soot, and an object of the present invention is to provide a small-sized soot whose sound range extends to a low frequency range of at least 27.5 Hz.

  It is another object of the present invention to provide a small kite that can be easily stretched and tuned without sacrificing the timbre or sound.

  The kite of the present invention made to solve the above-mentioned problems is a torso with one end portion being a crown and the other end portion being a crown, and a plurality of kites stretched between the crown and the crown A dragon horn projecting on the upper surface of the crown and supporting the heel, a cloud angle projecting on the upper surface of the dragon tail and supporting the heel, and a heel mounted on the upper surface of the trunk Is provided at one of the crown and the crown, and is provided at one end of the crown and the crown, and is provided at the other end of the crown and the crown. A tension adjusting locking mechanism for locking the other end of the collar and adjusting the tension of the collar, wherein the collar is made of metal, and the trunk has a length of 150 cm or less. The sound range extends to a low sound range of at least 27.5 Hz.

  Since the cocoons are made of metal, the density is high. Therefore, even if the length of the heel is shortened (L → small) in order to shorten the length of the heel, it is possible to cover not only the high sound range but also the low sound range. The bass can be covered with a margin by simply increasing the thickness of the heel. Since the sound range extends to a low frequency range of at least 27.5 Hz, it can be in charge of the low frequency range of Japanese music ensemble. Moreover, since length is 150 cm or less, conveyance is easy.

  In the above-mentioned scissors, the scissors are preferably composed of a core wire and a thin wire wound around the core wire.

  The timbre can be made equivalent to a traditional song.

  In addition, the koto column is preferably composed of a main body and a ring that is rotatably supported by the head of the main body and rotates by engaging with the heel.

  Even with a cocoon consisting of a core wire and a thin wire wound around the core wire, when the heel is pushed up by pushing the heel on the left side of the koto column, the friction between the koto column and the heel becomes rolling friction, so the movement of the heel is smooth. There is almost no noise when moving.

  The ring may be a ball bearing.

  The friction between the heel and the ring becomes friction free, and the movement of the heel becomes smoother, so that noise during movement can be further suppressed.

  The trunk includes a front plate, a back plate, a crown plate extending from the front plate below the dragon horn, a crown plate extending from the front plate below the cloud angle, and two side plates. It is good to provide the resonance box comprised by these.

  Since the body is equipped with a resonance box, the tone and sound of the sound are good.

  Further, the tension adjustment locking mechanism includes a plurality of insertion holes through which the plurality of hooks formed on the end side of the crown of the crown are passed, and a pivot plate provided to the crown plate so as to be rotatable. It is good to provide a plurality of bobbins around which the reed passed through the hole is wound.

  Since the crown is provided on the crown board where the kite passed through the insertion hole is wound, it is hidden by the torso of the trunk and cannot be seen from the side of the dragon. Since the head of the pincushion is outside the resonance box, it can be operated from the long door and has good operability.

  The one-end locking mechanism is connected to a through-hole through which the plurality of reeds formed on the end side from the cloud angle of the Ryuo are passed, and one end of the reed passed through the through-holes. And a piece which is attached and locked around the through hole.

  Since the through-hole is outside the resonance box, it is not necessary to perform re-covering or the like of the bag through the sound hole.

  Since the cocoons are made of metal, the density is high. Therefore, even if the length of the heel is shortened (L → small) in order to shorten the length of the heel, it is possible to cover not only the high sound range but also the low sound range. The bass can be covered with a margin by simply increasing the thickness of the heel. Since the sound range extends to a low frequency range of at least 27.5 Hz, it can be in charge of the low frequency range of Japanese music ensemble. Moreover, since length is 150 cm or less, conveyance is easy.

It is a front view of the bag concerning an embodiment. It is front sectional drawing of the bag which concerns on embodiment. It is a reverse view of the bag which concerns on embodiment. It is a schematic diagram of the scissors of the scissors which concern on embodiment, (a) is a side view, (b) is the sectional view on the AA line in (a).

  Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 4, the scissors according to the embodiment of the present invention have a body 1 including a surface plate 13, side plates 15, and a lower surface plate 14 having an arcuate cross section.

  One end of the body 1 forms a crown 11 and the other end forms a crown 12. The dragon horn 3 protrudes from the upper surface of the surface plate 13 of the crown 11, and the cloud angle 4 protrudes from the surface plate 13 of the dragon tail 12. Note that the upper surface of the surface plate 13 between the crown 11 and the crown 12 is referred to as a dragonfly.

  A crown plate 11 a extending below the dragon horn 3 is provided on the lower surface of the surface plate 13 of the crown 11, and a dragon cloud plate 12 a extending below the dragon cloud 4 is provided on the lower surface of the surface plate 13 of the crown 12. The surface plate 13, the back plate 14, the side plate 15, the crown plate 11a, and the dragon cloud plate 12a constitute a resonance box. A sound hole 14a is formed in the crown 11 side and the crown 12 side of the back plate 14.

  The back plate 14 extends to the end of the front plate 13 on the crown 11 side, but extends only to the crown plate 12a on the long tail 12 side. Therefore, as shown in FIG. 3, an opening 12 b is formed below the crown 11, and the lower surface of the surface plate 13 of the crown 12 can be accessed from below.

  The trunk 1 is made of paulownia, the width is set to about 33 cm so that 17 canopies can be stretched, and the length is 127 cm.

  The crown 12 is provided with a one-end locking mechanism 6 that locks one end of the rod 2 that is stretched between the crown 11 and the crown 12. Further, the crown 11 is provided with a tension adjustment locking mechanism 7 that locks the other end of the hook 2 and adjusts the tension of the hook 2.

  In the kite of the present embodiment, the kite 2 to be stretched may be a wood bass string on which a thin wire is not wound, but a string for a stringed instrument herb is used with emphasis on timbre. This rod 2 is made of steel. As shown in FIG. 4, the flange 2 of the present embodiment is composed of a core wire 2a having a thickness of about 1 mm and a thin wire 2b having a thickness of about 0.1 mm wound around the core wire 2a. The fine wire 2b is wound around the core wire 2a through a resin layer 2c as an adhesive layer. The number of the heels 2 is 17, and the outer diameter b of the heel 2 is set to four types of about 1.25 mm so as to cover the sound range of 17 音.

  As shown in FIGS. 1 to 3, the one-end locking mechanism 6 passes through the through hole 61 through which the hook 2 formed on the end side from the cloud angle 4 of the dragon tail 12 is passed, and the through hole 61. It is configured to include a piece 62 that is attached to one end portion of the flange 2 and is locked around the through hole 61. A guide bush 63 into which the flange 2 is inserted is fitted into the through hole 61. The guide bush 63 has a T-shaped cross section, and the shaft portion of the guide bush 63 is fitted into the through hole 61 of the surface plate 13. Between the lower end of the through hole 61 and the piece 62, a seat plate 64 having a hole through which the flange 2 is passed is inserted. Thereby, even if the surface plate 13 is made of a soft paulownia material, the piece 62 is not damaged.

  When replacing the reed 2, a hand is inserted from the lower surface opening 12 b of the body 1, and the reed 2 is passed through the through hole 61, or attached to the piece 62 and the piece 62 is arranged around the through hole 62. Can be easily performed.

  The tension adjustment locking mechanism 7 is provided in an insertion hole 71 through which the rod 2 formed on the end side from the crown 3 of the crown 11 is passed, and is rotatably provided in the crown plate 11 a and passes through the insertion hole 71. It is provided with a bobbin 72 around which the heel 2 is wound. A guide bush 73 into which the collar 2 is inserted is fitted into the insertion hole 71.

  The koto pillar 5 is placed on the surface plate 13 between the dragon horn 3 and the cloud angle 4, and the heel 2 is supported at an appropriate position. As shown in FIG. 2, the koto column 5 includes a main body 51 and a ring 52 that is rotatably attached to the head of the main body 51. In this embodiment, a ball bearing (F-BC2-5) manufactured by NTN Corporation was used for the ring 52.

  According to the bag of the present embodiment, the length of the trunk 1 is 127 cm, which is about 40% shorter than the conventional bag and is lighter (about 40% lighter than the conventional bag), so it is easy to carry. .

  According to the kite of this embodiment, since the length of the trunk 1 is 127 cm, the distance between the dragon horn 3 and the cloud angle 4 (the length of the kite) is only 116.5 cm, but the kite 2 is made of steel. Therefore, the sound range extends to a low frequency range of at least 27.5 Hz and can cover up to a low frequency range of 17 cm.

  Moreover, according to the kite of this embodiment, since the kite 2 is a herb string, the tone color is not inferior to that of the conventional Tetron kite.

  Moreover, according to the kite of this embodiment, since the rotary ring 52 of the koto column 5 is a ball bearing, the koto column 5 is a jar for herbs composed of the core wire 2a and the thin wire 2b wound around the core wire 2a. When the heel 2 on the left side is pushed to increase the noise, the friction between the koto pillar 5 and the heel 2 becomes rolling friction. As a result, the movement of the heel 2 is smooth and noise during movement is eliminated.

  Moreover, according to the kite of this embodiment, since the trunk | drum 1 is equipped with the resonance box, a timbre is inferior compared with the conventional kite.

  Moreover, according to the kite of this embodiment, even if the trunk | drum 1 is equipped with the resonance box, since the opening part 12b is formed in the lower surface of the dragon tail 12, the replacement of the kite 2 etc. can be performed easily. .

  Further, according to the kite of the present embodiment, the spool 72 around which the kite 2 passed through the insertion hole 71 is wound is provided on the crown plate 11a, so that it is hidden by the surface plate 13 of the trunk 1 and I can't see it from the side. Since the head of the pincushion 72 is outside the resonance box, it can be operated from the long door and has good operability.

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Torso 11 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Toryu 11a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Tunto plate 12 ・ ・ ・ ・ ・ ・ ・ ・ Tongo 12a ・··· Tongo 13 ··········································································· ········· 2a ······· Core wire 2b ··· Fine wire 3 ·············· 4 ...... Cloud angle 5 ..... Kotoshiba 51 ..... Main body 52 ..... ..Rings (ball bearings)
6 ······ One-end locking mechanism 61 ················································· 7・ ・ ・ ・ ・ Tension adjustment locking mechanism 71 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Through hole 72 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pan

Claims (7)

A trunk having one end as a crown and the other end as a crown, a plurality of ridges stretched between the crown and the crown, and a dragon horn projecting from the upper surface of the crown and supporting the ridge A cloud angle projecting on the upper surface of the dragon tail and supporting the heel, a koto pillar that supports the heel placed on the upper surface of the trunk and supports the heel at an appropriate position, and the pitch is variable, One end locking mechanism that is provided at one of the crown and the crown and that locks one end of the ridge, and the other end of the ridge and the crown that is provided at the other end of the crown and adjusts the tension of the ridge. A tension adjustment locking mechanism that includes:
The kite is made of metal, the trunk has a length of 150 cm or less, and the tone range extends to a bass range of at least 27.5 Hz or less.   The scissors according to claim 1, wherein the scissors are composed of a core wire and a thin wire wound around the core wire.   The koto column according to claim 2, comprising a main body and a ring that is rotatably supported by the head of the main body and is engaged with the heel to rotate.   The collar according to claim 3, wherein the ring is a ball bearing.   The trunk includes a front plate, a back plate, a crown plate extending from the front plate below the dragon horn, a crown plate extending from the front plate below the cloud angle, and two side plates. The scissors according to any one of claims 1 to 4, further comprising a resonance box.   The tension adjustment locking mechanism includes a plurality of insertion holes through which the plurality of hooks formed on the end side of the crown of the crown are passed, and a rotation plate provided on the crown plate so as to be rotatable. The scissors according to claim 5, comprising a plurality of bobbins around which the passed scissors are wound.   The one-end locking mechanism is connected to a through-hole through which the plurality of ridges formed on the end side from the cloud angle of the dragon tail are passed, and one end of the ridge passed through the through-hole. The cage | basket of Claim 5 provided with the piece latched around the said through-hole.

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