JP2002023737A - Small-sized koto (sou zither) - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate housing of many Koto's by making the Koto's simpler in struc ture, lighter in weight, easier to carry and handle, lower in cost and stackable so as not to interfere with frets. SOLUTION: The small-sized Koto is constituted in the following manner. Both ends are formed as a ryutou (head) 21 and ryubi (tail 22) to which strings G are stretched; the Koto has a shell plate 20 on which frets is mounted and which is an arcuate shape in cross section; the ryutou 21 side of the shell plate 20 is projectingly provided with an arcuate ryukaku (saddle) 27 for supporting the strings G; the ryubi 22 side of the shell plate 20 is projectingly provided with an arcuate shape unkaku (saddle) 28 to support the strings G; the ryutou 21 of the shell plate 20 is provided with one-end detaining mechanisms 30 for detaining one end of the strings G; the ryubi 22 of the shell plate 20 is provided with a stretching force adjusting and detaining mechanism 40 with which the other end of the strings G is detained and the stretching force of the strings is adjustable and the ryutou 21 and ryubi 22 of the shell plate 20 are respectively provided with a pair of grounded leg bodies 25; a pair of the leg bodies 25 on the ryufuku (belly) side of the shell plate 20 are opened to each other and the centers at the under surfaces of the leg bodies 25 are provided with recesses 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a koto, one of traditional Japanese musical instruments, and more particularly to a miniature koto.

[0002]

2. Description of the Related Art In general, a traditional koto is formed by using paulownia or the like for the trunk and using a karaki or the like for the crown (head) and the dragon tail (tail), and its standard length is 1820 mm. The width is about 250 mm on the crown side. The strings are made of Tetoron (registered trademark) or the like, and 13 strings are stretched in parallel to the crown and the crown via the koto pillar, and the player sits with the crown at the right and puts his nails on the thumb, forefinger and middle finger of the right hand and plays. Yes, the left hand is mainly used as a pusher who pushes the left side of the koto column to raise the string sound, and is also used to give a decorative sound called hiiro.

By the way, in recent years, in music classes at junior high schools and high schools, the aim of “fostering an attitude of cherishing traditional Japanese music” has been raised in music expression activities.
Since 2002, it has become mandatory to teach the performance of one or more types of Japanese musical instruments during the year. This is particularly significant in light of the recent development of international exchange among children and students, where opportunities for exposure to foreign cultures have increased. For details, in the curriculum for junior high school indicated by the Ministry of Education in December 1998,
"The expression teaching materials at junior high schools are as follows. A. Of the folk songs of Japan and the world, such as works from classical and modern times in Japan and the world, and folk songs in the local area, these are the ones that motivate and motivate students. B) Singing teaching materials should include those taken from the following perspectives, taking into account the actual situation of each school and student: (a) Things that have been sung and loved in Japan for a long time (a) Nature and nature of Japan You can feel the beauty of the four seasons. (C) You can enjoy the beauty of Japanese culture and Japanese language. " From the situation in such expression learning,
The use of "koto" as a Japanese musical instrument is under consideration.

However, the traditional koto is quite expensive, so it is difficult to purchase a desired number for school education, and even if it can be purchased, the trunk is long as described above and the weight is about Since it is heavy, about 5 to 8 kg, it is inconvenient to carry it, and it is difficult to carry it, such as the colloquial collapsing during movement, and there is a problem that a large space is required for a performance place or a rehearsal room. In addition, since thread tightening and thread replacement cannot be easily performed, a contractor must be entrusted each time, and there is a problem in that handling becomes difficult. Therefore, the use of a simple small koto instead of a traditional koto is being studied.

[0005] As such a small koto, conventionally, for example, as shown in FIG.
A small koto published in the official gazette is known. This small koto has a total length of approximately 910 to 920 mm, which is approximately half that of a traditional koto. The two ends are a crown 1 and a dragon tail 2 on which the strings G are stretched. It has a torso plate 3 having an arc-shaped cross section on which a koto column (not shown) for supporting the string G in a variable position is mounted. Crown 1 and crown 2 of body plate 3
The tongue plate 4 is hung down, and side plates 5 are hung on both sides of the body plate 3. The tongue plate 4 and the side plate 5 are fixed to the bottom plate 6, and the body plate 3, the tongue plate 4, the side plate 5 and A cavity 7 is formed with the bottom plate 6. An arc-shaped dragon angle 8 supporting the string G is projected from the crown 1 of the body plate 3, and an arc-shaped cloud angle 9 supporting the string G is projected from the crown 2 of the body plate 3. One end locking mechanism 10 for locking one end of the string G to the crown 1 of the vehicle, and a tension adjustment lock capable of locking the other end of the string G to the crown 2 of the body plate 3 and adjusting the tension of the string G A mechanism 13 is provided.

The one-end locking mechanism 10 has a through hole 11 formed outside the crown 8 of the crown 1 to allow the string G to pass therethrough, and is connected to one end of the string G passed through the through hole 11. Through hole 1
1 is provided with a top 12 that is locked around the periphery. The tension adjustment locking mechanism 13 includes a plurality of bearing holes 14 corresponding to a plurality of strings G and reaching the tongue plate 4 outside the cloud angle 9 of the dragon 2.
And a metal bobbin pin 16 whose head is engaged with a wrench 15 is rotatably provided in each bearing hole 14, and a string G is wound around the upper side 16 a of the bobbin pin 16. Is rotated by a wrench 15 to adjust the tension of the string G.

[0007]

However, in the above-mentioned conventional miniature koto, the tongue plate 4 and the side plate 5 are connected to the bottom plate 6.
And the body plate 3, the tongue plate 4, the side plate 5 and the bottom plate 6 form the cavity 7, so that the overall length is shortened, but the structure becomes complicated and heavy. ,
There is a drawback that it is difficult to hold and the handling is complicated. In addition, since the bottom plate 6 is provided, it is difficult to stack and store it. That is, when the bottom plate 6 is stacked, the bottom plate 6 interferes with the string G of the lower koto. In the case of a large number, there is a problem that the accommodation space becomes large. Further, in the tension adjustment locking mechanism 13, the thread winding pin 16
Since the string G is wound on the upper side 16a, the wound string G is exposed, and the appearance is poor.
Since it is made of metal, it has various problems such as being heavy.

[0008] The present invention has been made in view of the above problems, further simplifying the structure, reducing the weight, making it easy to carry and easy to handle, and at a low cost. Moreover, an object of the present invention is to provide a small-sized koto that can be stacked to facilitate storage of a large number of kotoes, and that is extremely convenient especially when used in schools and the like for teaching materials.

[0009]

According to the present invention, there is provided a small koto according to the present invention for solving the above-mentioned problems. It has a tortoiseshell on which a kotopost that supports and changes the pitch of the strings is mounted, and an arc-shaped body plate with a cross-section that has a belly on the back side, and an arc-shaped body that supports the strings on the toeboard side of the crown of the bodyplate. Protruding a dragon angle, protruding an arc-shaped cloud angle that supports the string on the dragon shell side of the dragon tail of the body plate, and providing an end locking mechanism for locking one end of the string to the crown of the body plate A small koto having a tension adjustment locking mechanism capable of locking the other end of the string to the crown of the body plate and adjusting the tension of the string,
A pair of legs that are grounded at the crown and the tail of the body plate, respectively, are provided, and a configuration is provided on the crown side of the body plate and between the pair of legs. Accordingly, since there is no bottom plate and side plate between the legs, the structure is simplified and the weight is reduced. Further, since the legs and the body plate can be directly gripped, it is easy to hold and easy to handle. Furthermore, even when stacked, the strings of the lower koto face the legs of the upper koto, so that interference between the strings and the body plate is suppressed, making it easier to store a large number of koto without damaging the strings,
It becomes extremely convenient when used in schools for teaching materials.

If necessary, the leg is formed in a plate shape having a surface substantially perpendicular to the longitudinal direction of the body plate, and a recess is provided at the center of the lower surface of the leg. When stacked, the lower arc-shaped body plate enters into the recess, so it is more stable than when no recess is provided and more when the stack height is the same. Can be stacked. Further, if necessary, the height of the legs is set to be large enough to accommodate the koto column of the small koto which is positioned below when stacked. Even when stacking with the koto pillar attached, the interference between the lower koto strings and the dragon belly of the upper body plate can be reliably prevented, and stacking with the koto pillar attached is extremely convenient for storage. become.
In addition, since it can be stored with the koto-post attached, it is not necessary to put up the koto-post at the time of use, which is extremely efficient in class and the like.

Further, if necessary, the tension adjusting and locking mechanism may be formed with an insertion hole through which the string is drawn through the crown, and the tension adjusting and locking mechanism is adapted to accommodate the plurality of strings outside the insertion hole of the crown. A plurality of bearing holes penetrating the crown are formed, and a string penetrating through each bearing hole and rotatably provided and having the lower end portion penetrated through the insertion hole wound thereon. It is configured with a peg. Since the end of the bobbin passes through the bearing hole and faces the bellows side of the body plate, the wound string is hidden by the body plate,
Since it cannot be seen from the dragon shell side, the appearance is better and the appearance quality is improved as compared with the related art. Furthermore, if necessary, the spool is made of wood. Lighter than metal, easier to hold, easier to handle, and inexpensive. Also, it has good compatibility with the wooden body plate, and the rotation is performed smoothly.

[0012] If necessary, the bearing hole and the bobbin are formed in a tapered shape, and a knob is provided at an upper end portion of the bobbin for facilitating the turning of the bobbin. Because of the tapered shape, it is easy to attach and detach the spool, and it is easy to assemble and disassemble. Also, the replacement of the strings becomes extremely easy. Furthermore, since there is a knob, it is easy to rotate the bobbin and the tension of the string is easily adjusted, and the operability is improved accordingly. Further, if necessary, the insertion hole is formed through a cloud angle protruding from the crown of the body plate. Since the cloud angle is formed through the cloud angle, the length of the insertion hole becomes long because the cloud angle is thick, and even if a strong tension acts on the strings, the string can be reliably held down. Further, a guide bush into which a string is inserted is inserted into the insertion hole as required. Thereby, when adjusting the tension of the string, the movement of the string can be made smooth and the wear of the string can be prevented.

Further, if necessary, the one-end locking mechanism may be formed with a through-hole through which a string is passed outside the crown of the crown, and one end of the string passed through the through-hole. And the top is fixed to the periphery of the through hole. After the string is supported at the dragon horn, it is pulled through the through hole and locked, so that this locking mechanism can be created as in a real traditional koto, and it is possible to prevent discomfort. Also,
If necessary, a guide bush through which a string is inserted is inserted into the through hole. When adjusting the tension of the string, the movement of the string can be made smooth and the wear of the string can be prevented. Further, a band-shaped pillow for supporting a string at the dragon corner is provided as necessary. When adjusting the tension of the string, the movement of the string can be made smooth and the wear of the string can be prevented.

Further, if necessary, the height of the cloud angle is formed to be higher on the back side than on the near side as viewed from the player. The back side is the bass range, so the length of the chord between the cloud angle and the koto-post is short, but the difference between the cloud angle and the height of the koto-post is small, so the angle of the chord with respect to the koto-post is small. The string can be strongly stretched without exerting excessive force on the koto pillar, and the low-pitched sound can be given a lingering sound, thereby preventing adverse effects. Furthermore, if necessary, the width D of the body plate is set to D = 250 to 260 mm, and the length L of the body plate is set to L = 800 to 1200 mm. The real traditional koto is D = 250-260mm
And L is about 1800 mm. In comparison with this, the length can be shortened and the size can be reduced, and even if the size is reduced, the width is almost the same. , It can reduce discomfort. Furthermore, if necessary,
The body plate was made of wooden plywood. As a result, it can be easily processed into an arc shape by pressing, has good workability, and has high hardness compared to natural wood, so it has good durability and sound is equivalent to a real traditional koto. And discomfort can be reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A miniature koto according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The same components as those described above will be described with the same reference numerals. As shown in FIGS. 1 to 5, the small koto K according to the embodiment is
It has. The body plate 20 supports the crown 21 and the crown 22 on both ends of which the strings G are stretched, and the string G with the surface stretched at appropriate positions to vary the pitch of the strings G. Are formed in a cross-section arc shape with a dragon shell 23 on which the horn is placed and a dragon belly 24 on the back surface. The body plate 20 is formed of a wooden plywood. Therefore, it can be easily processed into an arc shape by press working, the workability is good, and the manufacturing becomes easy. Also, the durability is good. Further, the width D of the body plate 20 is D
= 240-260 mm, 13 strings G are extended like the traditional koto, and the interval between the strings G is the same as that of the traditional koto. The length L of the body plate 20 is L
= 800 to 1200 mm, and is formed to a length of about half of a traditional koto. In the embodiment, the same strings as the traditional koto are used as the strings G and the kotos pillar S.

A pair of wooden legs 25, which are grounded, are provided on the crown 21 and the crown 22 of the body plate 20, respectively.
An opening is formed between the pair of legs 25 on the side of the belly 24 of the body plate 20. The leg 25 is formed in a plate shape having a surface substantially orthogonal to the longitudinal direction of the body plate 20. Further, a recess 26 is provided in the center of the lower surface of the leg 25, so that when the small koto K is stacked, the lower arc-shaped body plate 20 can enter the recess 26. That is, small koto K
When the legs 25 are stacked, the legs 25 are
Grounded along 0. An interval 25a is provided at the center of the joint between the body plate 20 and the leg 25. The sound comes out and the sound resounds better. This interval 25
Since the finger enters a, it becomes easy to hold. Further, the height of the legs 25 is set to a size that can accommodate the koto pillar S of the small koto K located on the lower side when the small koto K is stacked. That is, since the height of the koto pillar S is about 60 mm, the dimensions are set to accommodate this. As described above, the body plate 20 is supported by the pair of legs 25 and the belly 24 side is formed open. However, since the body plate 20 is made of a wooden plywood and the plywood is relatively hard, the sound of the string G is affected. It has the same sound as traditional koto.

An arcuate horn 27 for supporting the string G is protruded from the crown 21 of the body plate 20 on the side of the crown 23.
On the other hand, an arc-shaped cloud angle 28 that supports the string G is also protruded from the torpedo 23 side of the crown 22 of the body plate 20. The cloud angle 28 is
As shown in FIG. 3B and FIG. 5, the height is formed such that the back side 28b is higher when viewed from the player. That is, assuming that the height on the near side is h, the height on the back side is higher by ha. The crown 21 of the body plate 20 is provided with an end locking mechanism 30 for locking one end of the string G.
2 is provided with a tension adjusting and locking mechanism 40 which can lock the other end of the string G and adjust the tension of the string G. As shown in FIG. 4, the one-end locking mechanism 30
Forming a through hole 31 through which the string G is passed,
A string 32 is attached to one end of the string G passed through the through hole 31 and is locked around the through hole 31. A guide bush 33 into which the string G is inserted is inserted into the through hole 31. Further, a band-shaped pillow 34 for supporting the string G is attached to the dragon corner 27. In the embodiment, it is formed of a plastic string.

As shown in FIGS. 4 and 5, the tension adjusting and locking mechanism 40 has an insertion hole 41 through which the string G is passed through the crown 22.
And a plurality of bearing holes 42 corresponding to the plurality of strings G and penetrating through the dragon tail 22 are formed outside the insertion hole 41 of the dragon tail 22 so as to penetrate each bearing hole 42 and to be rotatable. It is provided with a bobbin 43 around which a string G passed through the insertion hole 41 is wound at a provided lower end portion 43a. The bearing hole 42 and the bobbin 43 are formed in a tapered shape. Because of the tapered shape, attachment and detachment of the thread spool 43 is easy, and assembly and disassembly are easy. As a result, the replacement of the string G becomes extremely easy. At the upper end of the bobbin 43, a knob 44 for easily rotating the bobbin 43 is provided integrally. The knob 44 may be held and rotated by hand, or may be rotated using a tool. The spool 43 is made of wood and integrally formed. The insertion hole 41 is formed through the cloud angle 28 protruding from the crown 22 of the body plate 20. A guide bush 45 into which the string G is inserted is inserted into the insertion hole 41.

Therefore, according to the miniature koto K according to this embodiment, the length L of the body plate 20 is L = 800 to 1200 m.
m, which is approximately half the length of a traditional koto, and since there is no bottom plate and side plates between the legs 25 as in the prior art, the structure is extremely simple and lightweight. In particular, since the bobbin 43 is made of wood, it is lighter than metal. Also, when carrying, since there is no bottom plate and side plates as in the conventional case, the legs 25 and the body plate 20 can be directly grasped, and when holding and holding, the body can be put between the legs 25, Therefore, in combination with the weight reduction, it becomes extremely easy to hold and the handling becomes easy. For example, when stored in a warehouse or the like, as shown in FIG. 6, a large number of small kotos K are stacked. In this case, the upper small koto K
Is placed on the crown 21 and the crown 22 of the body plate 20 of the small koto K on the lower side. In this case, since the concave portion 26 is provided at the center of the lower surface of the plate-like leg 25, when stacked,
The lower arc-shaped body plate 20 comes into the recess 26, and therefore, compared to a case where the recess 26 is not provided,
Stability is improved, and when the stacking height is the same, a larger number of units can be stacked, and storage efficiency is improved. Further, even when the strings are stacked, the strings G of the lower koto face the legs 25 of the upper koto, so that interference between the strings G and the body plate 20 is suppressed, and a large number of koto can be stored without damaging the strings G. Will be able to In particular, since the height of the legs 25 is set to a size that can accommodate the koto pillar S of the small koto K located on the lower side when stacked, even when the koto pillar S is mounted and stacked, Interference between the strings G and the bellows 24 of the upper body plate 20 can be reliably prevented, and the stacking with the koto pillars S can be performed, so that storage becomes easier and more convenient. Also, since the koto column S can be attached and stored, it is not necessary to attach the koto column S every time it is used, which eliminates complexity and becomes extremely convenient especially when used as a teaching material at a school or the like. That is, since the strings are stacked with the kotos pillars S standing up, they can be used one after another without tuning each time.

When using the miniature koto K according to this embodiment, the player sits with the crown 21 on the right and first,
The tension of the string G is adjusted by the tension adjusting and locking mechanism 40 of the crown 22. At this time, the bobbin 43 is rotated. In this case, pluck string 4 with your left hand while playing string G with your right hand.
The operability is extremely good because the tuning can be performed by rotating 3.
In addition, since the bobbin 43 is made of wood, the bobbin 43 has good compatibility with the wooden body plate 20, and the rotation is performed smoothly, and accordingly, the operability is improved. In this case, the insertion hole 41 is connected to the body plate 2.
Since the cloud angle 28 is formed through the cloud angle 28 protruding from the zero tail 22, the length of the insertion hole 41 becomes longer because the cloud angle 28 is thicker.
Therefore, even if a strong tension acts on the string G, the holding thereof can be ensured. Further, the string G is the dragon angle 2 of the crown 21.
7 and a through hole 31 formed outside of
The guide bush 33, 45 through which the string G is inserted is inserted into the through hole 41 formed in the cloud angle 28 protruding from the horn 28.
When adjusting the tension of the string, the movement of the string G becomes smooth,
Wear of the string G can be prevented. In addition, the string G
Since the belt-shaped plastic pillow 34 for supporting the string G is provided, the movement of the string G is also smooth when adjusting the tension of the string G, and the wear of the string G can be prevented.

In the small koto K adjusted as described above, the end of the thread winding 43 of the tension adjusting and locking mechanism 40 passes through the bearing hole 42 and faces the bellows 24 side of the body plate 20. As shown in FIG. 4 and FIG. 5, the wound string G is hidden by the body plate 20 and cannot be seen from the dragon shell 23 side. Can be improved. The width D of the body plate 20 is D = 24.
It is 0-260 mm, and it is configured to stretch 13 strings G. Therefore, even if it is small, the width is almost the same as that of the traditional koto. This can be done in the same way, and the discomfort can be reduced. And this small koto K
Is performed, the player sits with the crown 21 to the right, adjusts the position of the kotos pillar S as appropriate, adjusts the pitch, and nails the right thumb, index finger and middle finger to play. The left hand is mainly used as a pusher who pushes the left side of the koto pillar S to raise the string sound, and is also used for giving a decorative sound called "kiiro" or the like. In this case, as shown in FIG. 5, since the height of the cloud angle 28 is formed higher on the back side 28b than on the front side as viewed from the player, the back side is a low range, so that the cloud angle 28 and the Although the length of the string G between S becomes shorter, the difference between the cloud angle 28 and the height of the koto-post S becomes smaller, and the angle θ of the chord G with respect to the koto-post S becomes smaller. Even close to corner 28,
The string G can be strongly stretched without exerting an excessive force on the kotos pillar S, so that the sound in the low frequency range can be given a lingering sound, and a situation that adversely affects the sound can be prevented. Further, since the body plate 20 is made of wooden plywood, the plywood is relatively hard compared to natural wood, so that the sound of the string G exhibits the same sound as that of a traditional koto. Therefore, it is possible to perform with a feeling similar to a real traditional koto, and it is possible to reduce a sense of incongruity.

[0022]

As described above, according to the miniature koto of the present invention, since there is no bottom plate and side plates between the legs, the structure is simplified and the weight is reduced. Because it can be directly gripped, it is easy to hold and handle, and the price can be significantly reduced, making it easier to purchase. Furthermore, even when stacked, the strings of the lower koto face the legs of the upper koto, so that interference between the strings and the body plate is suppressed, making it easier to store a large number of koto without damaging the strings, It becomes extremely convenient when used in schools for teaching materials. And
When the legs are formed in a plate shape having a surface substantially orthogonal to the longitudinal direction of the body plate, and a recess is provided in the center of the lower surface of the legs, when stacked, the lower arc-shaped body plate is stacked. Since the recesses are inserted into the recesses, the stability is better as compared with the case where the recesses are not provided, and a larger number can be stacked when the stacking height is the same.

If the height of the legs is set so as to be able to accommodate the koto-post when stacked, even when the koto-post is mounted, the strings of the lower koto and the upper torso can be stacked. Interference with the dragon belly can be reliably prevented, and stacking can be performed with the koto post attached, making storage extremely convenient. Further, when the tension adjusting and locking mechanism is configured to wind the string around the lower end of the bobbin, the lower end of the bobbin faces the bellows side of the body plate, so that the wound string is the body plate. Since it is hidden by the dragon shell side, the appearance is better and the appearance quality can be improved as compared with the related art. Furthermore, when the bobbin is made of wood, the bobbin can be made lighter, easier to hold, easier to handle and more inexpensive than metal. In addition, it has good compatibility with a wooden body plate, can rotate smoothly, and can improve tuning operation. Further, in a case where the bearing hole and the bobbin are formed in a tapered shape, and a knob for facilitating the rotation of the bobbin is provided at an upper end portion of the bobbin,
Because of the tapered shape, the attachment and detachment of the spool can be facilitated, and the assembly and disassembly can also be facilitated. Also, the replacement of the strings becomes extremely easy. Furthermore, since there is a knob, the bobbin can be easily rotated, the tension of the string can be easily adjusted, and the operability can be improved accordingly.

Further, when the insertion hole is formed through a cloud angle protruding from the crown of the body plate, the length of the insertion hole is long because the cloud angle is thick because the cloud angle is formed. Even if a strong tension acts on the string, the holding of the string can be ensured. Further, when a guide bush through which a string is inserted is inserted into the insertion hole, the movement of the string can be smoothened and the wear of the string can be prevented when adjusting the tension of the string. Further, the one-end locking mechanism is formed with a through hole through which the string is passed outside the crown of the crown, and is attached to one end of the string that is passed through the through hole and locked around the through hole. In the case of a structure with a top, the string is supported at the dragon corner, then it is pulled through the through hole and locked, so that it has the same appearance as a real traditional koto, and prevents discomfort Can be. Furthermore, when a guide bush into which a string is inserted is inserted into the through hole, the movement of the string can be smoothened and the wear of the string can be prevented when adjusting the tension of the string. Further, when a belt-shaped pillow for supporting the strings is provided at the dragon corner, when adjusting the tension of the strings, the movement of the strings can be made smooth and the wear of the strings can be prevented.

Further, when the height of the cloud angle is formed higher on the back side than on the player side as viewed from the player, the back side is a low range, and the length of the chord between the cloud angle and the koto post is short. However, since the difference between the cloud angle and the height of the koto column is reduced, the angle of the string with respect to the koto column becomes smaller, so that the string can be strongly stretched without applying excessive force to the koto column, The sound can be given a lingering sound, and a situation that adversely affects the sound can be prevented. Further, the width D of the body plate is set to D = 250-2.
60 mm, and the length L of the body plate is L = 800 to 1200.
mm, the real traditional koto is D = 250 ~
At 260 mm, L is about 1800 mm. Compared to this, the length can be shortened and the size can be reduced, and even if the size is reduced, the width is almost the same. And discomfort can be reduced. Furthermore, when the body plate is made of wooden plywood, it can be easily processed into an arc shape by pressing, has good workability, and has a higher hardness than natural wood, so it is durable. The sound is good, and the sound can be made the same as that of a real traditional koto, reducing discomfort.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a small koto according to an embodiment of the present invention.

FIG. 2 shows a miniature koto according to an embodiment of the present invention,
(A) is a plan view and (b) is a front view.

FIG. 3 shows a miniature koto according to an embodiment of the present invention,
(A) is a side view on the crown side, and (b) is a side view on the crown tail side.

FIG. 4 is a front sectional view showing a main part of the miniature koto according to the embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part showing the back side of the dragon tail of the small koto according to the embodiment of the present invention.

FIG. 6 is a side view showing a state where small kotos according to the embodiment of the present invention are stacked.

FIG. 7 is a front sectional view of a main part showing an example of a conventional small koto.

[Explanation of symbols]

 K Small Koto G String S Kotobashi 20 Body Plate 21 Crown 22 Ryu 23 Ryuko 24 Dragon Belly 25 Leg 26 Depression 27 Dragon Angle 28 Cloud Angle 28b Back Side 30 One End Locking Mechanism 31 Through Hole 32 Top 33 Guide Bush 34 Pillow 40 Tension adjustment locking mechanism 41 Insertion hole 42 Bearing hole 43 Pin winding 43a Lower end 44 Knob 45 Guide bush

Claims (14)

[Claims] 1. A crown and a back on which a string is mounted at both ends and a harp on which a strut is supported at an appropriate position and the pitch of the string is variable. An arc-shaped body plate having a cross section with a belly as the belly is provided, and an arc-shaped dragon angle for supporting a string is provided on the crown side of the crown of the body plate, and a string is provided on the crown side of the crown of the body plate. An arc-shaped cloud angle to be supported is protruded, and a one-end locking mechanism for locking one end of the string to the crown of the body plate is provided. The other end of the string is locked to the crown of the body plate and the tension of the string is provided. In a miniature koto equipped with a tension adjusting locking mechanism capable of adjusting the tension, a pair of legs that are respectively grounded to the crown and the crown of the body plate are provided, and a pair of legs on the belly side of the body plate. A small koto that features an open space. 2. The leg according to claim 1, wherein the leg is formed in a plate shape having a surface substantially perpendicular to a longitudinal direction of the body plate, and a recess is provided at a center of a lower surface of the leg. Small koto. 3. The miniature koto according to claim 1, wherein the height of the legs is set to be large enough to accommodate a koto column of the miniature koto which is positioned below when stacked. 4. The tension adjustment locking mechanism, wherein an insertion hole through which a string is passed through the crown is formed, and the tension adjustment mechanism is disposed outside the insertion hole of the crown so as to correspond to the plurality of strings. A plurality of bearing holes are formed through the bearing holes, and a bobbin is provided at the lower end of the bearing hole so as to penetrate through the bearing holes and around which a string passed through the insertion hole is wound. The miniature koto according to claim 1, wherein the koto is configured. 5. The miniature koto according to claim 4, wherein said thread is made of wood. 6. The small koto according to claim 4, wherein the bearing hole and the bobbin are formed in a tapered shape, and a knob is provided at an upper end portion of the bobbin so as to easily rotate the bobbin. . 7. The vehicle according to claim 4, wherein the insertion hole is formed through a cloud angle protruding from a crown of the body plate.
Or the small koto described in 6. 8. A miniature koto according to claim 4, wherein a guide bush through which a string is inserted is fitted into said insertion hole. 9. The one-end locking mechanism, wherein a through-hole through which a string is passed outside the crown of the crown is formed, and the one-end locking mechanism is connected to one end of the string that is passed through the through-hole and is penetrated. 9. The miniature koto according to claim 1, 2, 3, 4, 5, 6, 7 or 8, comprising a piece locked around the hole. 10. The miniature koto according to claim 9, wherein a guide bush through which a string is inserted is fitted into said through hole. 11. The miniature koto according to claim 9, wherein a band-shaped pillow for supporting a string is provided at the dragon corner. 12. The camera according to claim 1, wherein the height of the cloud angle is formed higher on the back side than on the near side as viewed from the player.
A small koto according to 2, 3, 4, 5, 6, 7, 8, 9, 10, or 11. 13. The width D of the body plate is D = 240-26.
7. A structure in which thirteen strings are stretched at 0 mm, and the length L of the body plate is set to 800 mm to 1200 mm. 7, 8,
A small koto according to 9, 10, 11 or 12. 14. The body plate as claimed in claim 1, wherein said body plate is made of wooden plywood.
A small koto according to 8, 9, 10, 11, 12 or 13.