JP3601422B2 - Stringed frets and strings - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fret for a stringed instrument and a stringed instrument used for a stringed instrument such as an acoustic guitar and an electric guitar.
[0002]
[Prior art]
In a stringed musical instrument such as a guitar, a plurality of frets made of long and thin metal pieces are planted on a fingerboard at predetermined intervals in the direction in which the strings are stretched, and the fret changes the support point (effective chord length) of the strings. This allows the sound to change by a semitone for each fret.
[0003]
FIG. 9 is a perspective view showing a conventional fret, and FIG. 10 is a cross-sectional view showing a state of being driven into a fingerboard, where 1 is a fingerboard fixed to the surface of a rod of a stringed instrument such as a guitar, and 2 is the surface of the fingerboard 1 This is a fret to be driven into the fret groove 3 formed in the above. The fret 2 includes an elongated fret main body 4 having a semicircular cross-sectional shape, and a protruding main body 5 which is integrally protruded from the center of the lower surface of the fret main body 4 over its entire length and is press-fitted into the fret groove 3. By integrally projecting wedges 6 having a semicircular cross-section on both side surfaces of the fret groove 3, the coupling strength with the fret groove 3 is increased, and the protrusion main body 5 is prevented from falling out of the fret groove 3.
[0004]
When such a fret 2 is driven into the fret groove 3, first, a part of the extension 5 a provided on the distal end side of the wedge 6 of the projection main body 5 is driven into the fret groove 3 with a normal hammer to allow the fret 2 to stand on its own. In this state, the entire fret 2 is driven in using a press machine or a hammer as it is.
[0005]
When striking the fret 2, accurate striking is performed because the quality of the striking method affects the intonation of the stringed instrument (the tone is such that a state in which an accurate pitch can be obtained by pressing any fret is better). Is required. That is, if the driving method is not good and the height of the fret 2 fluctuates or is partially lifted, a gap is formed between the fingerboard 1 and the fret main body 4 not only to impair the appearance, but also to press the strings against the fret 2. When this occurs, variations occur, which causes the strings to twist.
[0006]
[Problems to be solved by the invention]
As described above, conventionally, it was difficult to push the fret 2 into the fret groove 3 by hand and make the fret 2 self-standing, so that it was necessary to hammer or press the fret 2 with a press machine. Also, even if it can be pushed in by hand, if it is a conventional fret shape, the inclination etc. remain unstable, so if you release your hand as it is and hit it with a hammer, it will fall down or tilt It was sometimes driven in a state where it was left.
[0007]
The present invention has been made to solve the above-mentioned conventional problems, and its object is to make it possible to easily and stably push by hand, and to minimize the occurrence of internal stress during press working. Another object of the present invention is to provide a fret for a stringed musical instrument and a stringed musical instrument which can be favorably driven into a fret groove of a fingerboard.
[0008]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a fret for a stringed instrument driven into a fret groove of a fingerboard, wherein the fret main body partitions a surface of the fingerboard, and the fret is vertically attached to a lower surface of the fret main body. A leg that is driven into the groove, and a plurality of self-standing projections are provided on the leg at appropriate intervals in the longitudinal direction of the leg .
[0009]
According to a second aspect of the present invention, in a fret driven into a fret groove of a fingerboard, the fret body includes a fret main body that partitions a surface of the fingerboard, and a leg portion that is integrally suspended from a lower surface of the fret main body and driven into the fret groove. The leg is divided into a plurality of parts, and a self-standing projection is provided in a gap between adjacent legs .
[0010]
According to a third invention, in the first or second invention, the length of the self-supporting projection is set to be larger than the width .
[0011]
According to a fourth aspect of the invention, the stringed musical instrument is provided with the fret according to the first, second, or third aspect of the invention.
[0012]
In the present invention, since the length of the self-supporting projection is set to be larger than the width, the self-standing protrusion can be easily pushed into the fret groove by hand, and can be self-supported in a stable state. In addition, since the self-standing projections are provided discontinuously, the generation of internal stress during the formation of the projections is small. Therefore, the radius of curvature of the fret does not become small, and when the leg is driven into the fret groove by the press machine, the whole can be driven uniformly, and the lower surface of the fret main body can be brought into close contact with the surface of the fingerboard over the entire length. . In particular, when the leg is divided into a plurality of parts and a self-standing projection is provided between the adjacent legs, the internal stress can be blocked by the gap between the adjacent legs, so that the bending of the fret due to the internal stress can be prevented. Can be prevented.
[0013]
Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.
1 is a perspective view of an acoustic guitar provided with a fret according to the present invention, FIG. 2 is a front view of the fret, FIG. 3 is an enlarged sectional view taken along line III-III of FIG. 2, and FIG. 4 is an enlarged view taken along line IV-IV of FIG. FIG. 5 is a sectional view showing the self-standing state of the frets. In these figures, an acoustic guitar 10 includes a body 11 for expanding and radiating the vibration of a string 13 and a neck part 12 connected to the tip of the body 11, and a lower piece 14 is provided on the surface side of the body 11. Six strings 13 are stretched between a bridge 15 provided therebetween and a bobbin fitting 16 provided at the tip of the neck portion 12. The outer shape of the body 11 is formed by a top plate 17, a back plate 18, a side plate 19, and the like, and a sound hole 20 is formed in the top plate 17.
[0014]
The neck portion 12 includes a rod 21, a finger plate 22 joined to the surface of the rod 21, a plurality of frets 23 and upper pieces 24 implanted at predetermined intervals on the surface of the finger plate 22, It is composed of a bobbin fitting 16 and the like. The surface of the fingerboard 22 is formed into a convex curved surface with an appropriate radius of curvature R (about 400 mm) such that the center in the width direction is highest and both ends are low.
[0015]
The fret 23 is formed of an elongated metal piece made of a cemented carbide (C7521W) or the like, and has a umbrella-shaped cross section to partition the surface of the fingerboard 22 and a center of the lower surface of the fret main body 23A. And a leg 23 </ b> B which is integrally suspended over substantially the entire length. In addition, on both side surfaces of the leg 23B, there are integrally formed projections 25 having a wedge-shaped (triangular) cross-section, and the protrusions 25 are integrally formed along the entire length of the leg 23B. A self-supporting projection 26 is integrally provided on the distal end surface. That is, in the present embodiment, three self-standing projections 26 are integrally extended on the leg 23B at equal intervals, and these self-standing projections 26 are formed on the surface of the fingerboard 21 when the fret 23 is driven. It is designed to be self-supporting by being manually inserted into the formed fret groove 27.
[0016]
Further, the frets 23 are curved so as to project upward with a radius of curvature (300 mm) smaller than the radius of curvature R (400 mm) of the surface of the fingerboard 22 before being driven into the fret grooves 27. The fret body 23A is deformed when driven into the groove 27, and the lower surface of the fret main body 23A is brought into close contact with the surface of the fingerboard 22 over the entire length, so that the curvature radius R of the surface of the fingerboard 22 becomes the same.
[0017]
As a condition for allowing the fret 23 to stand on the fret groove 27 independently, the length of the self-standing protrusion 26 may be set to be larger than the width. When the width of the fret groove 27 is set to be larger than the width of the self-supporting projection 26, the work of driving the fret 23 is not required, and the self-standing can be achieved. The height H of the fret 23 is 3.2 mm, the height H1 of the fret main body 23A is 1.1 mm, the width D1 of the fret main body 23A is 2 mm, the length L1 of the leg 23B is 1.5 mm, and the self-standing protrusion 26 The length L2 is 0.6 to 1.0 mm, and the width D2 of the leg 23B and the self-supporting projection 26 is smaller than the length L2 of the self-supporting projection 26, and is about 0.46 to 0.48 mm as in the conventional case. Is set to The depth W of the fret groove 27 is 3.2 mm, and the groove width D3 is about 048 to 0.5 mm as in the conventional case.
[0018]
The self-standing projection 26 can be easily formed by partially plastically deforming a leg of a general-purpose fret having no projection by press working. Since the self-supporting projections 26 are formed only at the three ends, both ends and the center of the leg 23B, the generation of internal stress is smaller than when the entire length is formed. Therefore, the radius of curvature of the fret 23 due to the internal stress is reduced. Can be prevented from becoming smaller.
[0019]
6 to 8 show other embodiments of the fret.
In this embodiment, the leg portion 23B of the fret 23 is divided into three, and the self-standing projection 31 is provided in a gap between the adjacent leg portions 23B. The self-supporting projection 31 is formed by stamping out two slits 32 in a portion of the leg 23B where the self-supporting projection 31 is to be formed by pressing, and simultaneously crushing the leg portion divided by these slits to cause plastic deformation. Formed by
[0020]
In the structure in which the self-supporting projections 31 are provided in the gap between the adjacent legs 23B in such a manner as to be separated from these legs, the internal stress generated at the time of forming the self-supporting projections 31 by press working is reduced by the slit 32. Since the leg 23B can be divided, almost no internal stress is generated in the leg 23B, and the radius of curvature of the fret 23 is smaller than that in the case where the self-standing projection 26 is formed on the continuous leg 23B in the above-described embodiment. Can be more reliably prevented.
[0021]
In the embodiment shown in FIG. 2, three self-supporting projections 26 are formed, and in the embodiment shown in FIG. 6, two self-supporting projections 31 are formed. However, the present invention is not limited thereto, and can be appropriately increased or decreased.
In the above embodiment, the present invention is applied to the acoustic guitar 10, but the present invention can also be applied to an electric guitar.
[0022]
【The invention's effect】
As described above, the stringed fret and the stringed musical instrument according to the present invention are provided with a leg that is driven into the fret groove on the lower surface of the fret main body, and provided with a self-standing projection on the leg. Since the length is set to be larger than the width, it can be easily and stably pushed into the fret groove by hand, and can stand alone in a stable state. Therefore, the step of driving the leg with a hammer is unnecessary, and the operation of driving the fret is easy. In addition, since a plurality of self-standing protrusions are provided on the leg portion of the fret, the generation of internal stress during the formation of the self-supporting protrusion by crushing is small, and the radius of curvature of the fret can be prevented from being reduced. . Therefore, the fret can be uniformly driven into the fret groove over the entire surface, the surface height of the fret can be made uniform, and the string can be prevented from being twisted during the performance.
[Brief description of the drawings]
FIG. 1 is a perspective view of an acoustic guitar provided with a fret according to the present invention. FIG. 2 is a front view of the fret.
FIG. 3 is an enlarged sectional view taken along line III-III of FIG. 2;
FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG. 2;
FIG. 5 is a sectional view showing a self-standing state of the frets.
FIG. 6 is a front view of a fret showing another embodiment of the present invention.
FIG. 7 is an enlarged sectional view taken along line VII-VII of FIG. 6;
8 is an enlarged sectional view taken along line VIII-VIII of FIG. 7;
FIG. 9 is a perspective view of a conventional fret.
FIG. 10 is a cross-sectional view showing a state where a fret is driven into a fingerboard.
[Explanation of symbols]
Reference numeral 21: rod, 22: fingerboard, 23: fret, 23A: fret body, 23B: leg, 25: detachment prevention part, 26: self-standing projection, 27: fret groove, 31: self-standing projection, 32 ... slit.

Claims (4)

In the fret for stringed instruments driven into the fret groove of the fingerboard,
A fret main body that partitions the surface of the fingerboard, and a leg that is vertically attached to the lower surface of the fret main body and is driven into the fret groove, and a self-standing projection is provided on the leg in a longitudinal direction of the leg. A fret for a stringed instrument, wherein a plurality of strings are extended at appropriate intervals . More in frets, which are discharged to the fret grooves fretboard, a fret body partitioning the surface of the finger plate, and a leg portion to be driven into the frets groove is vertically integrated with a lower surface of the fret body, the leg A fret for a stringed musical instrument , which is divided into individual pieces and provided with self-standing projections in gaps between adjacent legs . 3. The fret for a stringed instrument according to claim 1, wherein a length of the self-standing projection is set to be larger than a width . A stringed instrument comprising the fret according to claim 1, 2 or 3.

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