JPH043348Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to harp pillars, and in particular, by adding a fretting function, the length of the strings can be changed with small finger pressure, making it easier to play and producing a predetermined sound. This has been improved so that it can be reliably produced.

[Conventional technology]

As shown in Figure 6, the koto (koto) is equipped with a movable koto post 3 that supports the strings 2 stretched above the body 1, and the temperament can be adjusted by moving and adjusting the koto post 3 according to the type of key. , it is played by playing the string 2 with artificial nails attached to the tips of the thumb, index, and middle fingers of the right hand, and the left hand mainly presses the string 2 to the left of the harp post 3 (right side in the figure). By changing the tension, a predetermined sound is produced. This is usually called a "push hand". In such cases, ordinary people press down on the part of the string 2 that is an appropriate distance away from the harp post 3 and bring it into contact with the surface of the body to keep the finger pressure constant and obtain a predetermined tension, or in other words, the pitch, but Mr. In the case of an experienced player, the part of the string closer to the harp post 3 is pushed down to a predetermined depth to obtain a predetermined tension.

[Problem that the invention attempts to solve]

However, since the pressing hand requires very strong finger pressure, it is difficult for beginners and children to press down sufficiently deeply, resulting in the problem of players playing without being able to produce the desired sound. This does not provide proper pitch education, and requires a long period of time to improve due to unnecessarily forced practice, and it is hoped that improvements will be made to make it easier to play.

[Means for solving problems]

The Kotobashira according to the present invention was made to solve the above-mentioned problems, and includes a Kotobashira that is installed on the instrument body and supports the middle part of the string, and one or more auxiliary Kotobashira that is shorter than the Kotobashira. The instrument is equipped with a connecting rod that connects these harp pillars in a movably adjustable manner, and each harp pillar is provided with a screw hole, and each harp pillar is fixed to the connecting rod by a set screw screwed into the screw hole.

[Effect]

In this invention, the auxiliary harp post functions as a fret, and when the string is pressed down, the string is pressed against the top surface of the auxiliary harp post, thereby changing the length instead of the tension of the string. Therefore, strong finger pressure is not required, making it easy to play and ensuring that a predetermined pitch can be achieved. The fastening means securely fixes the harp post and the auxiliary harp post to the connecting rod, and prevents free movement due to string vibration.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a perspective view showing an embodiment of the kotobashira according to the present invention, and FIG. 2 is a sectional view showing a state in which the strings are pressed down. In these figures, the harp post 3 is formed of ivory, plastic, etc. into a substantially mountain shape, and has a substantially semicircular recess 10 provided at the center of its lower surface, and a recess 10 formed on the top surface that extends in the front-rear direction (longitudinal direction) of the strings 2. a string receiving groove 11 that restricts and prevents movement in a direction perpendicular to
an insertion hole 12 provided in the center and open on both sides;
A set screw (fastening means) 15 having a screw hole 13 formed in the center of the lower surface and communicating with the insertion hole 12, one end of the connecting rod 14 being inserted through the insertion hole 12, and fixing the connecting rod 14 in the screw hole 13. is screwed in. When the set screw 15 is loosened, the harp pillar 3 is connected to the connecting rod 1.
The movement is adjusted along 4. The connecting rod 14 extends in the longitudinal direction of the string 2, and an auxiliary harp post 16 shorter than the koto post 3 is attached to the other end so as to be movably adjustable. This auxiliary harp post 16 is also formed in a substantially mountain shape, and has a flat top surface 20, a semicircular recess 17 formed on the bottom surface, an insertion hole 18 that is open on both sides and into which the connecting rod 14 is inserted, and an insertion hole 18 that is open on both sides and into which the connecting rod 14 is inserted. It has a screw hole 20 that communicates with the hole 18 and into which a set screw 19 is screwed, and is installed on the shell 1. The auxiliary harp pillar 16 is placed on the right side of the harp pillar 3 when viewed from the performer.

In the koto string having such a configuration, when the part between the string 2 string 3 and the auxiliary string 16 or the part corresponding to the auxiliary string 16 is pushed down with the left hand and pressed against the top surface 20 of the auxiliary string 16, the string 2 Since the length of the effective vibrating portion of the instrument becomes shorter by the distance L between the harp post 3 and the auxiliary harp post 16, the pitch becomes correspondingly higher. In other words, the auxiliary harp post 16 serves as a fret on a guitar, etc., and by freely selecting its installation position, the auxiliary harp post 16 can be set at a desired pitch higher than the pitch of the open string, such as by a semitone, 1 degree, 2 degrees, etc. It allows you to obtain sound. in this case,
In this invention, the tension of string 1 remains almost unchanged and the pitch is changed by changing the length, so compared to the conventional method of changing the tension, strong finger pressure is not required, and even beginners and children can play the string. As long as the harp 2 is pressed against the auxiliary harp post 16, a predetermined pitch can be reliably obtained, making playing extremely easy. Therefore, unlike the method of changing the tension, the method of changing the length of the strings is easy to get used to the koto, and allows you to quickly acquire the correct pitch.In contrast to the method of changing the tension, the method of changing the length of the strings is different from the method of changing the tension. Therefore, it has the advantage of being able to quickly create chord sounds and switch sounds, allowing you to enjoy crisp performances that match contemporary music.

In addition, even if the length is changed, the string 2 is pressed against the auxiliary harp pillar 16 while the string 2 is pressed against the auxiliary harp pillar 16.
If the tension is lowered by pulling it to the side, it is also possible to lower the pitch in the same way as in the conventional method.

Furthermore, since the string 2 and the auxiliary harp post 16 are not normally in contact with each other, if the part of the string on the left side of the koto post 3 is pushed in as seen from the player, it is possible to enjoy the performance by changing the tension of the string 2 as in the past. It should be obvious that it can be done. In addition, by tightening the setscrews 15 and 19, the harp post 3 and the auxiliary harp post 16 are securely fixed to the connecting rod 14, so that the auxiliary koto post 16, which is normally released from the string 2 during performance, is connected by the vibration of the body. It is possible to perform well without fear of movement along the rod 14, and by loosening these setscrews, the harp pillars 3 and 16 can be moved and adjusted to desired positions, or can be moved from the connecting rod 14. Can be easily removed. In this case, it may be possible to omit the setscrews 15 and 19 and use the frictional force between the connecting rod 14 and the harp post to fix it, but in that case it would be difficult to set the frictional force, and if it is too large, fine adjustment may be required. If it is too small, the auxiliary harp post 16 will move during vigorous performance or frequent fret operations, which will interfere with the performance and is not practical.

FIG. 3 is a front view showing another embodiment of the present invention. In this embodiment, two auxiliary strings 1 are attached to the connecting rod 14.
6A and 16B are respectively attached so as to be movable and adjustable. In this case, the auxiliary harp pillar 16A is formed higher than the auxiliary harp pillar 16B.

In such a configuration, the part between the harp post 3 of the string 2 and the auxiliary harp post 16A and the auxiliary harp post 16A are
By selectively pressing the part between and 16B to bring the string 2 into contact with the top surface of the auxiliary harp post 16A and the top surface of the auxiliary harp post 16B, the pitch can be changed higher in two steps.

FIG. 4 is a perspective view showing still another embodiment of the present invention. In this embodiment, when the koto post (not shown) supporting the string 2A and the auxiliary koto post 16A provided corresponding to the string 2A are significantly apart, it is necessary to form a long connecting rod to connect the koto post. Therefore, the auxiliary string 16 is smaller than the string 2A.
A connecting rod 14 bent into a substantially square shape is provided on the harp post 3B, which is provided at a position close to the string 2A and supports another string 2B stretched close to the string 2A. The connecting rod 14 is shortened by attaching a 2A auxiliary harp post 16. In this case, it goes without saying that the strings 2B adjacent to the strings 2A are not limited to being adjacent to each other, but may be one or several strings apart from each other.

FIG. 5 is a perspective view showing still another embodiment of the present invention. In this embodiment, the string 2B is supported by a harp pillar 3B.
A connecting rod 14 is provided, and an auxiliary string post 16B is attached to the tip of the connecting rod 14 corresponding to the string 2B, and a branching portion 14A is integrally provided to the connecting rod 14, and a branching portion 14A is attached to the connecting rod 14 corresponding to the string 2A adjacent to the branching portion 14A. Auxiliary harp pillar 16
A is provided.

[Effect of idea]

As explained above, in the koto-bashira of the present invention, an auxiliary koto-bashira is provided on the koto-bashira via a connecting rod, and by pressing a string onto this auxiliary koto-bashira, the length of the effective vibrating part of the string is changed, and a predetermined pitch can be achieved. Compared to the conventional playing method of varying the tension to obtain a predetermined pitch, this method does not require strong acupressure and allows the predetermined pitch to be easily and reliably obtained, making playing much easier. It can be both fun and enjoyable. Therefore, even beginners and children can produce the correct sounds, which is highly effective in teaching pitch sense. Additionally, since the auxiliary kotobashira is shorter than the kotobashira and normally does not come into contact with the string, it is possible to enjoy playing without removing it from the kotobashira, using the traditional performance method of changing the tension of the string. . Furthermore, since the playing method of changing the length of the string allows the notes to be changed quickly, it is suitable for playing crisp musical pieces, and it is possible to enjoy a performance that is different from the original image of the koto. In addition, since the harp post and the auxiliary harp post are fixed to the connecting rod with set screws, they can be securely fixed in the desired position, and the auxiliary harp post will not move along the connecting rod due to vibration during performance. Its practical effects are very great, such as being able to play well without having to worry about it.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the kotobashira according to the present invention, Fig. 2 is a sectional view with the strings pressed down, Fig. 3 is a front view showing another embodiment of the present invention, and Fig. 4 5 is a perspective view showing still another embodiment of the present invention, FIG. 5 is a perspective view showing still another embodiment of the present invention, and FIG. 6 is a diagram showing the state in which the strings are pressed down using a conventional harp post. . 1...Body, 2,2A,2B...Strings, 3,3B...
...Kinbashira, 14...Connecting rod, 15, 19...Set screw, 16, 16A, 16B...Auxiliary Kotobashira.

Claims (1)

[Scope of utility model registration request] It is equipped with a koto-bashira installed on the body to support the middle part of the string, one or more auxiliary koto-bashira that is shorter than this koto-bashira, and a connecting rod that connects these koto-bashira in a movable and adjustable manner, and each koto-bashira is equipped with a screw hole. , and each harp pillar is fixed to the connecting rod by a set screw screwed into the screw hole.