String for stringed instrument and method for manufacturing string for stringed instrument

Abstract

The present invention provides a string for a stringed instrument and a method for manufacturing the string for a stringed instrument, which can provide a stringed instrument suitable for a ukulele, a guitar and the like, and can reproduce a timbre close to that of a natural gut string at a low cost. The string for a stringed instrument (1) of the present invention uses a wire (W) made of a synthetic resin as a constituent material, and is normally wound into a coil-like shape. When in use, it is stretched on the target stringed instrument in a state of being unfolded from the coil-like shape. With this structure, a string for a stringed instrument (1) is formed, which can reproduce an excellent timbre close to that of a natural gut string at a low cost using the wire (W) made of a synthetic resin as a constituent material, and has various characteristics as a string for a stringed instrument (1) (for example, there is no negative side even when the tension is weak, the volume is loud, the string is stable even after it has just been stretched, and the pitch is correct, etc.).

Description

Technical Field

[0001] The present invention relates to a string instrument string and a method for manufacturing a string instrument string. More specifically, the present invention relates to a string instrument string and a method for manufacturing a string instrument string, which can provide a string instrument string having excellent timbre at low cost. Background Art

[0002] As strings for musical instruments represented by guitars such as ukuleles and classical guitars (strings for stringed instruments), for example, strings made of wires made of synthetic resins such as polyvinylidene fluoride resins and polyamide (also known as nylon (registered trademark)) resins are known, and these strings are also widely sold. In addition, a technology related to strings for musical instruments made of monofilaments of vinylidene fluoride has been proposed (for example, see Patent Document 1, etc.).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Publication No. 7-2937 ([Claims],

[0011] ) Summary of the invention

[0006] Technical Problems to be Solved by the Invention

[0007] However, conventional strings for stringed instruments such as ukulele strings and guitar strings have the following reality: the timbre is not good enough, and expensive strings have to be used when good timbre is required.

[0008] The present invention has been completed in view of the above situation, and its purpose is to provide a string for a string instrument and a manufacturing method for a string instrument, which can provide a string instrument string suitable for string instruments such as ukulele and guitar at a low cost and can reproduce a timbre close to that of a natural gut string.

[0009] Technical solutions for solving technical problems

[0010] In order to solve the above problems, the string for a stringed instrument of the present invention is characterized in that:

[0011] The string for a stringed instrument is made of a wire material, the wire material is made of a synthetic resin and has an outer diameter d of 0.3 to 1.2 mm,

[0012] The stringed instrument string is wound into a coil shape.

[0013] The string for a stringed instrument of the present invention is characterized in that the synthetic resin is at least one selected from polyvinylidene fluoride resins and polyamide resins.

[0014] The stringed instrument string of the present invention is characterized in that the winding diameter D of the coiled shape is 0.8 to 4.0 mm, and the number of windings (number of coils) t per meter is 130 to 520 times / m.

[0015] The string for a stringed instrument of the present invention is characterized in that it is a ukulele string or a guitar string in the present invention.

[0016] The method for manufacturing a string for a stringed instrument of the present invention is characterized in that one end of a wire material made of synthetic resin and having an outer diameter d of 0.3 to 1.2 mm is fixed, and the other end of the wire material is twisted relative to the length direction so that the wire material is wound into a coil shape.

[0017] The method for producing a stringed instrument string of the present invention is characterized in that the synthetic resin is at least one selected from polyvinylidene fluoride resins and polyamide resins.

[0018] The method for manufacturing a string for a stringed instrument of the present invention in the present invention is characterized in that the rotation speed for winding the wire into a coil shape is set to 600 rpm or more.

[0019] The method for manufacturing a string for a stringed instrument of the present invention is characterized in that the wire material wound in the coil shape is irradiated with gamma rays.

[0020] Effects of the Invention

[0021] The string for a stringed instrument of the present invention uses a wire material made of synthetic resin as a constituent material, is normally wound into a coil shape, and is unwound from the coil shape when in use and is stretched on a target stringed instrument. With this configuration, a string for a stringed instrument is formed that can reproduce an excellent timbre close to that of a natural gut string at low cost using a wire material made of synthetic resin as a constituent material, and has various characteristics as a string for a stringed instrument.

[0022] Furthermore, the method for producing a stringed instrument string of the present invention can produce a stringed instrument string that is normally wound in a coil shape and that can exhibit the above-mentioned effects by a simple method. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a perspective view showing one embodiment of the string for a stringed instrument of the present invention.

[0024] Figure 2 Observe from above Figure 1 .

[0025] Figure 3 This is a diagram showing one embodiment of an apparatus for manufacturing strings for stringed instruments. DETAILED DESCRIPTION

[0026] (I) The structure of the string instrument string 1 of the present invention:

[0027] Hereinafter, one embodiment of the string instrument string 1 according to the present invention will be described with reference to the drawings.

[0028] Figure 1 A perspective view showing one embodiment of a string instrument string 1 according to the present invention, Figure 2 From above ( Figure 1 Observe in the direction of the thick black arrow) Figure 1 Figure. Figure 1 as well as Figure 2 In the figure, "1" indicates a stringed instrument string, "11" indicates one end, "12" indicates the other end, "2" indicates an internal space, "W" indicates a wire material (which becomes the stringed instrument string 1), "d" indicates the outer diameter of the stringed instrument string 1, and D indicates a winding diameter. Figure 1 A portion (middle portion) of the entirety is omitted and indicated by two dashed lines.

[0029] Figure 1 as well as Figure 2 The string instrument string 1 shown in the figure (hereinafter also referred to as simply "string 1") is normally wound into a coil shape (indicating an unused state. The same applies hereinafter), and when in use, it is unfolded from the coil shape and stretched on the target string instrument.

[0030] The string instrument string 1 of the present invention (hereinafter also referred to simply as "string") can be used for various string instruments such as ukulele, guitar (for example, classical guitars that have hitherto used fluorocarbon strings, nylon strings, etc.), mandolin, banjo, koto, koto, shamisen, etc.

[0031] The string instrument string 1 of the present invention is made of a wire material W (the processing of the string instrument string 1 will be described later. Figure 3 ), the wire W is composed of a synthetic resin (with a synthetic resin as a constituent material), for example, preferably, a synthetic resin such as a fluororesin such as a polyvinylidene fluoride (PVDF) resin, a polytetrafluoroethylene (PTFE) resin, a polyamide (nylon (registered trademark. The same also applies to "nylon")) resin, an acetate resin such as a cellulose acetate resin, a polyethylene resin, a polypropylene resin, a polyethylene terephthalate resin, and other polyolefin resins are used as the constituent material of the string 1 for a stringed instrument or the wire W forming the string 1 for a stringed instrument. In the present invention, it is particularly preferred to use a polyvinylidene fluoride resin or a polyamide resin that has a practical record of being widely used as a constituent material of the string 1 for a stringed instrument. The synthetic resins may be used alone or in combination of two or more.

[0032] If the material constituting the wire material W forming the string 1 for a stringed instrument is a polyvinylidene fluoride resin or a polyamide resin, it can be expected that when used as the string 1 for a stringed instrument, the timbre and sound quality are excellent, and the sound can be produced more stably. In addition, polyvinylidene fluoride resin is used as a raw material for fishing lines (also as strings for stringed instruments) and is used for lines called "fluorocarbon (lines)". In the present invention, as the wire material W for forming the string 1 for a stringed instrument, such fluorocarbon (lines) and lines (nylon lines) composed of polyamide (nylon) resins can be used.

[0033] As the polyvinylidene fluoride resin, it is preferred to use a homopolymer of a vinylidene fluoride monomer. In addition, it is not limited to this homopolymer, and as other polyvinylidene fluoride resins, a copolymer of one or more of a vinylidene fluoride monomer and a monomer copolymerizable with the vinylidene fluoride monomer, or a mixture of the copolymer and a homopolymer of the vinylidene fluoride monomer, etc. can be used.

[0034] Examples of the monomer copolymerizable with the vinylidene fluoride monomer include trifluoroethylene, tetrafluoroethylene, chlorotrifluoroethylene, hexafluoropropylene, and vinyl fluoride. One of these monomers may be used alone, or two or more thereof may be used in combination.

[0035] In the range that does not hinder the purpose and effect of the present invention, the polyvinylidene fluoride resin may also contain various additives such as organic pigments, polyester plasticizers, phthalate plasticizers, nucleating agents represented by flavanone, or a composition formed by mixing poly (meth) acrylates, polyesters, methyl acrylate-isobutylene copolymers and resin materials with good compatibility with the vinylidene fluoride resin. In addition, including polyvinylidene fluoride resins, in the range that does not hinder the purpose and effect of the present invention, various additives (plasticizers, antioxidants, lubricants, etc.) used when forming the wire W may also be appropriately added to the synthetic resin used.

[0036] In addition, the content of the polyvinylidene fluoride resin in the composition is preferably 90% by mass or more, particularly preferably 95% by mass or more. In addition, as the plasticizer, for example, a polyester having a molecular weight of 1500 to 4000 and a repeating unit composed of an ester of a diol having 2 to 4 carbon atoms and a dicarboxylic acid having 4 to 6 carbon atoms, and a terminal group composed of a monovalent acid group or a monovalent alcohol residue having 1 to 3 carbon atoms is preferably used.

[0037] Figure 1 as well as Figure 2The outer diameter d of the string instrument string 1 of the present invention as shown (the outer diameter of the wire W forming the string instrument string 1 is also common. The same applies hereinafter) can be appropriately determined according to the constituent material of the wire W forming the string instrument string 1, the applied musical instrument (ukulele, guitar, etc.), the scale of the string used in the musical instrument (in the case of ukulele, which scale among the 1st to 4th strings is it. In the case of guitar (classical guitar, etc.), which scale among the 1st to 3rd strings, such as the string instrument string 1 of the present invention, can be applied. The same applies hereinafter to the “scale of the string applied”), etc., but the outer diameter d can be generally set to 0.3 to 1.2 mm, preferably 0.4 to 1.0 mm, and particularly preferably 0.45 to 0.9 mm.

[0038] In addition, in the present invention, when the string instrument string 1 is a ukulele string, in order to be applied to 1 to 4 strings (1 string (A), 2 strings (E), 3 strings (C), 4 strings (G) (() is an open scale)), the outer diameter d of the string instrument string 1 (wire W) is preferably approximately 0.4 to 1.0 mm, and particularly preferably 0.45 to 0.9 mm. In addition, when the string instrument string 1 is a guitar string, for example, in order to be applied to 1 to 3 strings ((1 string (E), 2 strings (B), 3 strings (G), 4 strings (D) (() is an open scale)), the outer diameter d of the string instrument string 1 (wire W) is preferably approximately 0.4 to 1.0 mm, and particularly preferably 0.45 to 0.9 mm.

[0039] like Figure 1 as well as Figure 2 As shown, the stringed instrument string 1 of the present invention is usually wound into a coil (spiral shape). And, when used, it is unfolded from the coiled state and stretched straight on a stringed instrument represented by a ukulele, guitar, etc.

[0040] In the state of being wound into a coil shape in the normal state, the winding diameter D of the string instrument string 1 can be appropriately determined according to the constituent material of the formed wire material W, the outer diameter d of the string instrument string 1, and the applied instrument, the scale of the string applied to the instrument, etc., but the winding diameter D is preferably approximately 0.8 to 4.0 mm, more preferably 1.0 to 3.0 mm, further preferably 1.2 to 2.8 mm, and particularly preferably 1.3 to 2.7 mm. In addition, if Figure 1 as well as Figure 2 As shown, the “winding diameter D” refers to the outer diameter D (coil diameter) in the width direction of the coiled stringed instrument string 1 surrounding the inner space 2 when the stringed instrument string 1 is wound in a coil.

[0041] The winding diameter D is preferably approximately in the range of the value obtained by multiplying 8 / 3 to 10 / 3 by the outer diameter d of the stringed instrument string 1 (wire W) (D = d × 8 / 3 to d × 10 / 3). In addition, it is preferred that the length of one turn (one turn of the coil) in the width direction of the stringed instrument string 1 (the outer circumference in the width direction of the stringed instrument string 1 wound into a coil shape) is approximately the winding diameter D × 2.4 to 2.6. In the case of this range, if the outer diameter d is determined, it is possible to estimate the length of the coil manufactured with the winding diameter D and the unit length of the wire W (for example, 1m) (the length direction of the stringed instrument string 1 (coil length direction: refer to Figure 1 ))'s length.

[0042] Similarly, the number of windings (number of coils) t per unit length (1m) of the stringed instrument string 1 can be appropriately determined according to the constituent material of the wire W to be formed, the outer diameter d of the stringed instrument string 1, the applied musical instrument, the scale of the string applied to the musical instrument, etc., but the number of windings (number of coils) t per unit length is preferably approximately 130 to 520 times / m, more preferably 150 to 420 times / m, further preferably 170 to 400 times / m, and particularly preferably 190 to 380 times / m.

[0043] (II) Method for manufacturing string 1 for stringed instrument:

[0044] An example of a method for producing the string instrument string 1 of the present invention will be described. Figure 1 as well as Figure 2 The stringed instrument string 1 shown is usually wound into a coil (spiral) shape. To achieve this coiled shape, it is preferred that an unwound straight (linear) wire W is processed into a coiled (spiral) shape.

[0045] For the wire W composed of synthetic resin, it is preferred to use extrusion molding, melt spinning, dry (wet) spinning and other well-known methods to process the synthetic resins mentioned in (I) to obtain a straight (straight) wire W that is usually not wound. The wire W can have a single-layer structure or a (multi-)layer structure with a core and a sheath. The outer diameter d of the wire W can be within the range mentioned in (I).

[0046] Such a wire W made of synthetic resin can use commercially available wire W. If it is a polyvinylidene fluoride resin among the resin materials, for example, KF STRINGS, SEAGUAR (all manufactured by Kureha Synthetic Fiber Co., Ltd.), ROOTS FC LEADER (manufactured by GOSEN CO., LTD.), X-BRAID (manufactured by Y.G.KCO., LTD.), Shooter (manufactured by SUNLINE CO., LTD.), etc., which are known as fluorocarbon wires, can be used. In addition, if it is a polyamide (nylon) resin, Silver Scale (manufactured by Toray Industries, Ltd.), Queen Star (manufactured by SUNLINE CO., LTD.), A PRIME (manufactured by Sanyo Nylon Co., Ltd.), etc., which are known as nylon wires, can be used.

[0047] In order to process the unwound straight (linear) wire W into a shape wound into a coil (helical shape), for example, a Figure 3 The device X shown is easily manufactured by the following method.

[0048] Figure 3 1 is a diagram showing one embodiment of an apparatus X for manufacturing a string instrument string 1. Figure 3 In the figure, "W" represents a wire (becoming the string 1 for a stringed instrument), "W1" represents one end of the wire W (becoming one end 11 of the string 1 for a stringed instrument), "W2" represents the other end of the wire W (becoming the other end 12 of the string 1 for a stringed instrument), "R" represents a rotating driving body, and "S" represents a rotating driving portion of the driving body R. In addition, in Figure 3 , a state in which the distance L between one end W1 and the other end W2 of the wire W is set to 1 m is shown.

[0049] The rotating driving body R can fix the other end W2 of the wire W and Figure 3 The driving body that can twist the wire W relative to the length direction by rotating relative to the length direction of the wire W is not particularly limited, and for example, a hand drill (manual hand drill, electric hand drill, etc.) with a rotatable rotation drive portion S can be cited. Moreover, for example, the following method can be adopted: when one end W1 of the wire W is fixed at a predetermined location, the other end W2 of the wire W is clamped and fixed to the rotation drive portion S (not shown in the figure) of such a hand drill, so that the two ends W1 and W2 of the wire W are fixed.

[0050] exist Figure 3In the process, one end W1 of the wire W is fixed, and the other end W2 is fixed to a rotating driving part S that is rotatable relative to the length direction of the wire W. When the wire W is tensioned, the rotating driving part S of the rotating driving body R is rotated relative to the length direction, thereby (while applying a specified tension as required) rotating the other end W2 of the wire W relative to the length direction, and twisting the wire W (the other end W2) relative to the length direction.

[0051] exist Figure 3 In the embodiment, the other end W2 of the wire W is twisted relative to the length direction by the rotation of the rotation drive unit S, but as the twisting of the wire W progresses, the wire W gradually becomes wound. Figure 1 The shape of a coil (spiral) as shown in FIG. 1 (hereinafter sometimes simply referred to as a "coil-shaped shape", etc.). As such a "rotational speed at which the shape starts to become coil-shaped" (in addition, the rotation is transmitted to the wire W (the other end W2) by the rotation driving portion S of the rotation driving body R for the rotation of the wire W, so the rotational speed becomes the rotational speed (number of twists) for twisting the wire W. The same applies hereinafter), it can be considered that it is caused by the outer diameter d of the string 1 for a stringed instrument, the length required for being stretched on the musical instrument to be used, etc., and it can also be appropriately determined according to the scale of the string used in the musical instrument, etc. Approximately 400 turns / m or more per meter is preferred, 400 to 750 turns / m is further preferred, and 450 to 650 turns / m is particularly preferred.

[0052] The wire W is twisted to be wound into a coil shape. As the twisting of the wire W is further performed, when the necessary amount of the wire W is in a coil shape, a limit (twist limit) is reached where the wire W will no longer be in a coil shape even if twisted. If this torsion limit is reached, the wire W will not be in a coil shape even if it is further twisted. Even if it is twisted, the energy is accumulated in the wire W. When the other end W2 of the wire W is removed from the rotating drive unit S and released, the energy accumulated by the rotation (twist) is released or dissipated, so that the wire W rotates in the opposite direction of the twisting (rotation). In addition, if the wire W is twisted relative to the length direction and once it becomes a coil shape, it will not return to its original straight state even if the other end W2 of the wire W is removed from the rotating drive unit S and becomes an open state, and it maintains Figure 1 as well as Figure 2 The winding shown is in the shape of a coil.

[0053] The “(b) rotation speed required for the string to become a coil-like shape” may be determined based on the outer diameter d of the string 1 for a stringed instrument, the length required for being stretched on the instrument to which it is applied, etc., and can also be appropriately determined based on the scale of the string used in the instrument, etc. In addition to the “(a) rotation speed required for the string to begin to become a coil-like shape”, it is also considered to be achieved by applying 200 to 500 rotations, but there is no particular limitation.

[0054] As a standard, the "(a) rotation speed at which the coil shape is formed" and the "(b) rotation speed for forming the necessary amount of the coil shape" are combined to form the "rotation speed for winding the wire W into a coil shape", preferably about 600 rpm or more per meter, more preferably 700 rpm or more, and particularly preferably 750 rpm or more. In addition, if the cutting of the wire W is taken into consideration, the rotation speed is preferably 1200 rpm or less, more preferably 1100 rpm or less, and particularly preferably 1050 rpm or less.

[0055] The rotation speed per meter mentioned above is ultimately a guideline, and is considered to be caused by the outer diameter d of the string instrument string 1 and the length required for being stretched on the instrument to be used, and can be appropriately determined according to the scale of the string used in the instrument.

[0056] In addition, the faster the rotation speed of the rotation driving part S in the rotation driving body R (the rotation speed for rotating the wire W), the better the manufacturing efficiency. On the other hand, if it is too fast, the wire W may be cut, etc., so it is preferably within the range of approximately 100 to 750 rpm.

[0057] Furthermore, the obtained wire W (string 1 for stringed instruments) wound in a coil shape may be irradiated with gamma rays as a post-processing. By irradiating with gamma rays, the tone color, sound quality, etc. (hereinafter sometimes simply referred to as "tone color, etc.") emitted can be changed. For example, compared with the wire W wound in a coil shape without irradiating with gamma rays, various tones such as a unique tone with corners cut and withered can be achieved. It is presumed that such a change in tone color, etc. is due to the fact that only the molecular arrangement of the wire W has changed over several decades due to the irradiation with gamma rays.

[0058] The irradiation conditions of gamma rays can be appropriately determined according to the constituent material of the formed wire W, the outer diameter d, the required tone, etc., and there are no particular restrictions within the range that does not adversely affect the various properties of the wire W (string 1 for stringed instruments) (for example, mechanical properties deteriorate due to excessive irradiation, etc.). For example, as an absorbed dose, about 10,000 Gr is taken as a standard, and it can be 5,000 to 20,000 Gr, but it is not limited to this range. In addition, in order to achieve the absorbed dose, for example, the dose rate can be set to 100 to 10,000 Gr / h, and the irradiation time suitable for the dose rate can be selected to irradiate gamma rays, but the dose rate and irradiation time can also be arbitrarily selected.

[0059] (III) Effects of the invention:

[0060] The string 1 for a stringed instrument of the present invention described above uses a wire W made of synthetic resin as a constituent material, and is normally wound into a coil shape. When in use, it is unwound from the coil shape and stretched on a target stringed instrument. With this structure, it is possible to reproduce an excellent timbre close to that of a natural gut string at low cost using the wire W made of synthetic resin as a constituent material, and it has various characteristics as a string 1 for a stringed instrument (for example, there is no negative side even when the tension is weak, the volume is loud, the string is stable even immediately after being stretched, and the pitch is correct, etc.).

[0061] Furthermore, the method for manufacturing the string 1 for a stringed instrument of the present invention can manufacture the string 1 for a stringed instrument which is normally wound in a coil shape and can exhibit the above-mentioned effects by a simple method.

[0062] As described above, the obtained stringed instrument string 1 can be applied to various stringed instruments, and is particularly preferably applied as a string to be applied to a ukulele or a guitar (ukulele string, guitar string).

[0063] (IV) Variations of the Embodiments:

[0064] In addition, the above-described method shows one method of the present invention, and the present invention is not limited to the above-described embodiments, and deformation and improvement within the scope of the present invention and the purpose and effect are of course also included in the content of the present invention. In addition, within the scope of the purpose and effect of the present invention, there is no problem that the specific structure and shape when implementing the present invention are formed into other structures, shapes, etc. The present invention is not limited to the above-described embodiments, and deformation and improvement within the scope of the purpose of the present invention are also included in the present invention.

[0065] For example, Figure 3As shown, in the above-mentioned embodiment, the distance L between the one end W1 and the other end W2 of the wire W is set to 1 m when the wire W is processed into the string 1 for a stringed instrument, but this distance L is not particularly limited to 1 m, and the distance L can be appropriately determined according to the length of the string 1 for a stringed instrument required for the applied instrument, and any distance that is easy to manufacture can be selected. In addition, this distance L gradually becomes shorter as the straight wire W is wound into a coil shape during the actual manufacturing process of the string 1 for a stringed instrument, so the other end W2 of the wire W also needs to approach the one end W1.

[0066] In addition, in the above-mentioned method, the following description is given: as a means for twisting the other end W2 of the wire W relative to the length direction of the wire W, a device X is cited, and a hand drill as a rotating driving body R having a rotating driving part S is used. While the other end W2 of the wire W is fixed to the rotating driving part S, the rotating driving part S is rotated relative to the length direction of the wire W to twist the wire W, but the structure, means, etc. of the device X are not limited to the above-mentioned method, and any component that can twist the wire W relative to the length direction can be used.

[0067] Furthermore, the specific structure and shape when implementing the present invention may be other structures within the scope of achieving the purpose of the present invention.

[0068] Example

[0069] Hereinafter, the present invention will be described in further detail based on Examples and the like, but the present invention is not limited thereto.

[0070] [Example 1]

[0071] Ukulele string manufacturing (1):

[0072] The ukulele string of Example 1, which is a string instrument string, was manufactured using the following method.

[0073] As wire materials, fluorocarbon (fluorocarbon wire) (KF STRING: Kureha Chemical Fibers Co., Ltd., using polyvinylidene fluoride resin as a constituent material) having outer diameters d of 0.47 mm (1st string), 0.62 mm (2nd string), 0.74 mm (3rd string), and 0.52 mm (4th string) with specifications shown in Table 1 was prepared.

[0074] (How to make ukulele strings)

[0075] like Figure 3As shown, one end of the wire is fixed, and the other end is fixed to the rotation drive unit (length from one end to the other end: 1m) of a commercially available hand drill (manual) as a rotation drive body, and the rotation drive unit of the hand drill is rotated under the conditions described in Table 1 while applying tension to the wire, thereby twisting (the other end) of the wire relative to the length direction. As the rotation proceeds, the wire is wound into a coil shape, and when it reaches a state where it cannot be twisted further (torsion limit), the rotation is stopped, and the wire is removed from the hand drill, and an appearance of Figure 1 as well as Figure 2 The ukulele string of Example 1 is as such. The winding diameter D, the number of windings t, etc. of the ukulele string of Example 1 obtained are also shown in Table 1 as the specifications of Example 1. In addition, in Table 1, the polyvinylidene fluoride resin is simply shown as "polyvinylidene fluoride". In addition, in Table 1, the "coil length (mm) of the coil made of 1m wire" indicates the length direction of the string instrument string (ukulele string) (coil length direction: refer to Figure 1 )'s length (mm) (the same also applies to Example 2 (Table 2) below).

[0076] (Specifications of Example 1, etc.)

[0077] [Table 1]

[0078]

[0079] Regarding (a) the rotation speed at which the shape of the coil begins to be formed, for the four wires in Table 1, the shape of the coil begins to be formed at a twist (rotation) of 500 to 600 times / m. In addition, regarding (b) the rotation speed for making the necessary amount (here 1m) into a coil shape, (although it changes due to tension), based on the above rotation speed, for the four wires in Table 1, it is 300 to 400 rpm (combined with the above rotation speed, the rotation speed for making 1m of wire into a shape wound into a coil becomes 800 to 1000 rpm). The rotation speed of the rotary drive unit of the hand drill was appropriately changed within the range of 100 to 750 rpm.

[0080] In addition, for the ukulele strings of Example 1 shown in Table 1, two types of strings were produced: a string that was not irradiated with gamma rays and a string that was irradiated with gamma rays under the following irradiation conditions. In a cobalt 60 irradiation facility, a device with a radiation source intensity of 2000TBq was used to implement gamma ray (cobalt 60) irradiation. Four ukulele strings were irradiated. After irradiation, almost no change in appearance was observed for the ukulele strings of Example 1.

[0081] (γ-ray irradiation conditions)

[0082] Radiation source strength 2000TBq

[0083] Dose rate about 5000Gy / h

[0084] Irradiation time: 2 hours (total absorbed dose: about 10,000 Gy of Cobalt 60)

[0085] [Test Example 1]

[0086] Evaluation of Ukulele Strings:

[0087] Evaluations were also conducted including comparisons of the obtained ukulele string of Example 1 with the following common ukulele strings (nylon strings and (fluoro) carbon strings (hereinafter sometimes simply referred to as "carbon strings")) that are commercially available as reference examples. In addition, the ukulele string of Example 1 was stretched on the ukulele in a state of being unwound from a coiled shape when used.

[0088] Specifically, two people with experience as professional musicians (one of whom was a working professional musician) were selected as evaluators (panelists). The evaluators played the ukulele strings of Example 1 and nylon strings and carbon strings, which are representative examples of conventional ukulele strings, on ukuleles of the same model for the following evaluation items ((1) to (5)). The ukulele strings of Example 1 were played on a plurality of ukuleles owned by the evaluators and compared with conventional ukulele strings including the ukulele strings described above. The ukulele strings of Example 1 were evaluated, including comparison with conventional ukulele strings.

[0089] (Reference example: nylon string)

[0090] Product name: Famous Ukulele Nylon Strings (1st string (A) - 2nd string (E) - 3rd string (C) - 4th string (G) (() is an open scale. The following carbon strings are the same): 0.64-0.81-0.91-0.71)

[0091] (Reference example: carbon string)

[0092] Product name: Worth Clear Fluoro Medium (1 string (A)-2 string (E)-3 string (C)-4 string (G): 0.52-0.67-0.74-0.57)

[0093] (Evaluation items and results)

[0094] (1) Relationship with tension (strength of the ukulele string):

[0095] The evaluator said that, when the ukulele strings of Example 1 were tuned to the same tone (scale), they were compared with the usual ukulele strings. Although the tension was weak, when the same tone was produced, there was no negative side that usually occurred with the strings with weak tension. Here, "no negative side" means, for example, that there was no situation such as the tension being weak, the volume being difficult to control when plucking the ukulele strings, the fingers being unable to leave the ukulele strings, the effort being wasted (i.e., becoming difficult to play), etc.

[0096] (2) Volume (the volume produced when playing):

[0097] The evaluator said that the ukulele string of Example 1, as a string with low tension as described in (1), felt that the volume produced when playing was large. In addition, when the ukulele string of Example 1 was compared with a normal ukulele string, under the condition of standard tension, the volume felt was nylon string < Example 1 < carbon string (in terms of volume, the nylon string had the smallest volume and the carbon string had the largest volume).

[0098] (3) The period from the completion of string setting to the stabilization of the string:

[0099] The period until the string stabilizes is about one month for a normal nylon string and about two weeks for a normal carbon string, but the evaluator said that the Example 1 was not felt even after the string was set. Specifically, the ukulele string of Example 1 had a gradual decrease in pitch due to the elongation of the string immediately after the string was set in the ukulele, so the string could be used stably even in a short period of several hours to several days after the string was set.

[0100] (4) Accuracy of pitch (whether the correct scale can be engraved):

[0101] The evaluator said that when the ukulele string of Example 1 was evaluated as a single unit, the pitch was correct, and there was no significant difference even when compared with ordinary ukulele strings (which are high-end ukulele strings with excellent pitch accuracy, as opposed to cheap ukulele strings that have difficulty in pitching).

[0102] (5)Tone:

[0103] The common nylon strings have a warm, mellow, slightly damp tone (the timbre of the ukulele that has been impressed by warmth and mellowness), and the common carbon strings have a powerful and clear tone (these are also the timbre of the common ukulele, but are clearer, more powerful, and more distinct, and on the other hand, are less "warm" and "melodic" than nylon strings). The evaluator said that the ukulele strings of Example 1 have an impression of a bright, relaxed, and loud tone, and reproduced a tone close to the tone of a natural gut string, for example.

[0104] The timbre of natural gut strings is between nylon and carbon, stronger than nylon strings, warmer than carbon strings, and in a good sense, a relaxed and dry timbre. In addition, due to the "roughness" of the string surface caused by the structure, when used as a string instrument string, moderate (comfortable) finger noise is generated, and when the finger pressing the fret is moved during solo, a comfortable sound such as "squeaky" is produced, creating a "feeling of being played".

[0105] The above contents are the characteristics of natural gut strings, but the ukulele string of Example 1 also has the impression of inheriting these characteristics, such as simple sounds such as single notes, and the feeling when playing also has the impression of being extremely close to natural gut strings. However, the ukulele string of Example 1 eliminates the biggest disadvantage of natural gut strings, which will break immediately when played with force, and will not break even if played with force.

[0106] (6) Other notes:

[0107] The evaluator said that the ukulele strings of Example 1 have a significant effect of improving the problems of using natural gut strings and old-fashioned strings, and the problems of sound including timbre when using a cheap ukulele with quirks (strict compatibility with the strings, strong quirks (defects) of the instrument itself, a tendency for the string pitch to become high, so that the deviation of the high-position interval is easy to become significant, etc.).

[0108] Natural gut strings are generally much less stable and durable than nylon strings and carbon strings, and are also very expensive, so currently almost no one uses them as ukulele strings. In addition, when the ukulele first appeared, natural gut strings were used, but nowadays, natural gut strings are rarely used except for classical instruments (and super high-end ones), especially for ukuleles.

[0109] On the other hand, the timbre of the ukulele strings of Example 1 is excellent in that it is as good as the beautiful timbre of ordinary strings such as nylon strings and carbon strings, and its timbre is also very good. In addition, the sound produced is also stable. As a timbre that is extremely close to that of natural gut strings, it should be enjoyable for many people.

[0110] In addition, as a standard for the usable period of the string, it is considered that ordinary nylon strings are 1 year and carbon strings are 3 years. However, based on the feeling of use this time, the evaluator said that it is expected that the sound of the strings of the present invention will not deteriorate even if they are used for a long time longer than ordinary ukulele strings, and good durability can be expected.

[0111] Taking the above results into consideration, it can be confirmed that the ukulele strings of Example 1 can reproduce an excellent timbre close to that of natural gut strings, and have various characteristics as ukulele strings that are not inferior to ordinary nylon strings and carbon strings, such as having no negative side even when the tension is weak, having a loud volume, being stable even right after being stretched, and having correct pitch.

[0112] In addition, a relatively inexpensive wire material made of fluorocarbon (polyvinylidene fluoride resin) used for fishing lines is used. By using this wire material, the ukulele string of Example 1 that can appropriately achieve the above-mentioned effects can be manufactured simply and at low cost using the above-mentioned method.

[0113] In addition, for the ukulele strings of Example 1, both the string irradiated with gamma rays and the string not irradiated with gamma rays were used for evaluation, but the basic evaluation results (feelings) were the same. In addition, it was confirmed that the ukulele strings irradiated with gamma rays had a unique tone of being dehorned and withered. It is speculated that this is because the molecular arrangement of only the wire material (polyvinylidene fluoride resin (fluorocarbon)) has changed over several decades.

[0114] [Example 2]

[0115] Ukulele string manufacturing (2):

[0116] As wire materials, nylon lines (nylon fishing lines) having outer diameters d of 0.62 mm (1st string), 0.81 mm (2nd string), 0.87 mm (3rd string) and 0.7 mm (4th string) were prepared (Silverscale: Toray Industries, Ltd., made of polyamide (nylon) resin).

[0117] Then, the wire rod was used in the same method as the "method for manufacturing ukulele strings" of Example 1 to manufacture ukulele strings of Example 2 as strings for stringed instruments. The winding diameter D, number of windings t, etc. of the obtained ukulele strings of Example 2 are also shown in Table 2 as the specifications of Example 2. In Table 2, polyamide-based resins are simply referred to as "polyamide".

[0118] (Specifications of Example 2, etc.)

[0119] [Table 2]

[0120]

[0121] As in Example 1, regarding (a) the rotation speed at which the wire begins to become coiled, for the four wires in Table 2, all of them begin to change into coils at a twisting rate of 500 to 600 times / m. In addition, as in Example 1, regarding (b) the rotation speed for making the necessary amount (here 1m) into a coiled shape, (although it changes due to tension), on the basis of the above rotation speed, for the four wires in Table 2, all of them are 300 to 400 rpm (combined with the above rotation speed, the rotation speed for making 1m of wire become a shape wound into a coil is approximately 800 to 1000 rpm). As for the rotation speed of the rotary drive unit of the hand drill, as in Example 1, it was appropriately changed within the range of 100 to 750 rpm and implemented.

[0122] The ukulele strings of Example 2 shown in Table 2 were irradiated with gamma rays under the same conditions as those shown in Example 1. As a result, it was confirmed that the ukulele strings irradiated with gamma rays had a unique, rounded tone with no sharp edges compared to the strings not irradiated with gamma rays, as in Example 1. This is presumably because the molecular arrangement of the wire material (polyamide (nylon) resin) alone has changed over several decades.

[0123] Industrial Applicability

[0124] The present invention has high industrial applicability as a means for providing strings for stringed instruments that can reproduce a timbre close to that of a natural gut string at low cost.

[0125] Description of reference numerals:

[0126] 1…Strings for stringed instruments

[0127] 11... one end

[0128] 12…The Other End

[0129] 2…Interior Space

[0130] W...Wire

[0131] W1... one end of the wire

[0132] W2...the other end of the wire

[0133] R... Rotating drive body

[0134] S... Rotation drive unit

[0135] L...the distance between one end of the wire and the other end

[0136] X……device

[0137] D...winding diameter

[0138] D... the outer diameter of the string used in stringed instruments

Claims

1. A string for a stringed instrument, such as a ukulele string or a guitar string, characterized in that: The stringed instrument string is made of a straight wire material, the wire material is made of synthetic resin and has an outer diameter (d) of 0.3 to 1.2 mm. The stringed instrument string is usually wound into a coil shape and has an internal space when not in use, and the winding diameter (D) of the coil shape is 0.8 to 4.0 mm. When used, the stringed instrument string is unwound from a coiled state and is stretched linearly on the stringed instrument for use.

2. The string for a stringed instrument according to claim 1, characterized in that: The synthetic resin is at least one selected from polyvinylidene fluoride resins and polyamide resins.

3. The string for a stringed instrument according to claim 1 or 2, characterized in that: The number of windings per meter (t) is 130 to 520 times / m, where the number of windings is the number of coils.

4. A method for manufacturing a string for a stringed instrument, for manufacturing the string for a stringed instrument according to claim 1, characterized in that: One end of a wire material made of synthetic resin and having an outer diameter (d) of 0.3 to 1.2 mm is fixed, and the other end of the wire material is twisted in the longitudinal direction so that the wire material is wound into a coil shape.

5. The method for manufacturing a stringed instrument string according to claim 4, characterized in that: The synthetic resin is at least one selected from polyvinylidene fluoride resins and polyamide resins.

6. The method for manufacturing a string for a stringed instrument according to claim 4 or 5, characterized in that: The rotation speed for winding the wire into a coil shape is set to 600 rpm or more.

7. The method for manufacturing a string for a stringed instrument according to claim 4 or 5, characterized in that: The wire material wound into the coil is irradiated with gamma rays.

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