Soundboard, method of manufacturing the same, and musical instrument with soundboard

Abstract

To provide a soundboard which is easy to process and also light-weight while maintaining substantially the same strength with conventional soundboards.SOLUTION: A soundboard includes: a first plate which includes a first surface; a second plate which includes a second surface opposed to the first surface; a first intervention member which comes into contact with the first surface and the second surface, and has a wall part arranged like a net when viewed in a direction perpendicular to the first surface; and a second intervention member which is bonded to the first surface and the second surface, and has larger rigidity than the first intervention member.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a soundboard, a method for manufacturing a soundboard, and a musical instrument equipped with a soundboard. [Background technology]

[0002] Stringed instruments use soundboards to transmit the vibrations of the strings. For example, Patent Document 1 discloses a soundboard having a honeycomb core as a core material, with fiber-reinforced resin plates bonded to both sides of the core material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 56-099584 Summary of the Invention [Problem to be solved by the invention]

[0004] One object of the present invention is to provide a lightweight soundboard that maintains the same strength as conventional soundboards. [Means for solving the problem]

[0005] According to one embodiment, a soundboard is provided that includes a first plate including a first surface, a second plate including a second surface opposite the first surface, a first intervening member in contact with the first surface and the second surface, the first intervening member having walls arranged in a mesh pattern when the first intervening member is viewed in a direction perpendicular to the first surface, and a second intervening member adhered to the first surface and the second surface and having greater rigidity than the first intervening member.

[0006] According to one embodiment, a musical instrument is provided that includes strings that vibrate when operated by a player, the above-mentioned soundboard, and a bridge that transmits the vibrations of the strings to the soundboard.

[0007] According to one embodiment, there is provided a method for manufacturing a soundboard, comprising arranging a first intervening member and a second intervening member on a first board, and covering the first intervening member and the second intervening member with a second board, wherein the first intervening member is in contact with a first surface of the first board and a second surface of the second board, the second intervening member is bonded to the first surface and the second surface, the first surface and the second surface face each other, the first intervening member has walls arranged in a net shape when the first intervening member is viewed in a direction perpendicular to the first surface, and the second intervening member has a greater rigidity than the first intervening member. Effect of the Invention

[0008] According to the present invention, it is possible to provide a lightweight soundboard while maintaining the same strength as conventional soundboards. [Brief description of the drawings]

[0009] [Figure 1] 1 is a front view showing an acoustic guitar according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded view of the top plate of the body of the acoustic guitar shown in FIG. 1. [Diagram 3] 3 is a perspective view of a first intermediate member used in the top plate shown in FIG. 2. [Figure 4] 3 is a cross-sectional view of a portion of the top plate taken along A1-A2 in FIG. 2. [Diagram 5] FIG. 5 is a cross-sectional view of the top plate corresponding to FIG. 4. [Figure 6] 3 is a diagram for explaining the grain direction of the second intervening member shown in FIG. 2. [Figure 7] FIG. 2 is an exploded view of the back plate of the body of the acoustic guitar shown in FIG. 1. [Figure 8] 5A to 5C are diagrams for explaining an example of a manufacturing method for the top plate of the body of the acoustic guitar according to one embodiment of the present invention. [Figure 9] 5A to 5C are diagrams for explaining an example of a manufacturing method for the top plate of the body of the acoustic guitar according to one embodiment of the present invention. [Figure 10]5A to 5C are diagrams for explaining an example of a manufacturing method for the top plate of the body of the acoustic guitar according to one embodiment of the present invention. [Figure 11] 5A to 5C are diagrams for explaining an example of a manufacturing method for the top plate of the body of the acoustic guitar according to one embodiment of the present invention. [Figure 12] 5A to 5C are diagrams for explaining an example of a manufacturing method for the top plate of the body of the acoustic guitar according to one embodiment of the present invention. [Figure 13] 10A to 10C are diagrams for explaining a manufacturing method for the top plate of an acoustic guitar body according to a modified example of the present invention. [Figure 14] 10A to 10C are diagrams for explaining a manufacturing method for the top plate of an acoustic guitar body according to a modified example of the present invention. [Figure 15] 10A to 10C are diagrams for explaining a manufacturing method for the top plate of an acoustic guitar body according to a modified example of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The embodiments shown below are merely examples, and the present invention is not to be interpreted as being limited to these embodiments. In the drawings referred to in this embodiment, the same parts or parts having similar functions are given the same or similar symbols (symbols with A, B, etc. added after numbers) and repeated explanations may be omitted. In order to clarify the explanation, the drawings may be described schematically with dimensional ratios different from the actual ratios or parts of the configuration omitted from the drawings.

[0011] A soundboard according to one embodiment includes a first intervening member having a net-like structure at least in a portion thereof, and a second intervening member adjacent to the first intervening member and having a greater rigidity than the first intervening member. Both the first intervening member and the second intervening member are sandwiched between two plates. This allows the weight of the soundboard to be reduced, while realizing the acoustic characteristics desired for the instrument and ensuring the rigidity of the soundboard, compared to an instrument having a soundboard made of a single plate. In addition, in the manufacturing method of such a soundboard, the processing step of forming a recess in the plate material for filling the intervening member can be omitted, thereby reducing the loss of the plate material.

[0012] A soundboard and a musical instrument including the soundboard according to an embodiment will be described below. In the embodiment described below, the musical instrument is an acoustic guitar as an example. Note that the musical instrument according to the present invention is not limited to an acoustic guitar.

[0013] A musical instrument according to one embodiment of the present invention and a soundboard included in the musical instrument will be described with reference to Figs. 1 to 7. Fig. 1 is a front view showing an acoustic guitar according to this embodiment. Fig. 2 is an exploded view of the top plate of the body of the acoustic guitar shown in Fig. 1. Fig. 3 is a perspective view of a first intermediate member used in the top plate shown in Fig. 2. Fig. 4 is a cross-sectional view of a portion of the top plate taken along A1-A2 shown in Fig. 2. Fig. 5 is a cross-sectional view of the top plate corresponding to Fig. 4. Fig. 6 is a view for explaining the grain direction of the second intermediate member. Fig. 7 is an exploded view of the back plate of the body shown in Fig. 1.

[0014] As shown in FIG. 1, an acoustic guitar 1 (hereinafter referred to as guitar 1) includes a body 11, a neck 12, and strings 13.

[0015] The body 11 is formed in a box shape having a cavity inside. The body 11 has a top plate 14, a back plate 15, and side plates 16. The top plate 14 and the back plate 15 are flat plates of the same shape. The top plate 14 and the back plate 15 face each other and are arranged at a distance from each other in the thickness direction. In the following description, the direction in which the top plate 14 and the back plate 15 are lined up (Z-axis direction) may be referred to as the up-down direction. The side plates 16 extend from the periphery of the back plate 15 to the periphery of the top plate 14, connecting the top plate 14 and the back plate 15. The top plate 14, the back plate 15, and the side plates 16 form the body 11 having a cavity inside. The top plate 14, the back plate 15, and the side plates 16 also function as soundboards to transmit the vibration of the strings 13.

[0016] A sound hole 17 is formed in the top plate 14, penetrating it in the thickness direction. The sound hole 17 connects the cavity of the body 11 to the space outside the body 11. A bridge 18 is provided on the outer surface of the top plate 14 to fasten first ends of the strings 13 in the longitudinal direction. The back plate 15 has an inner surface 15a that faces the top plate 14 in the up-down direction.

[0017] The neck 12 extends from the body 11 in a direction generally perpendicular to the up-down direction (Z-axis direction). A head 19 is provided at the tip of the neck 12 for winding the second longitudinal end of the string 13. In the following description, the direction perpendicular to the up-down direction and in which the neck 12 mainly extends (Y-axis direction) may be referred to as the front-rear direction. Additionally, the direction perpendicular to the up-down direction and the front-rear direction may be referred to as the left-right direction (X-axis direction).

[0018] The string 13 is stretched across the body 11 and the neck 12 in the front-to-rear direction. Specifically, a first end of the string 13 is fastened to a bridge 18 of the body 11, and a second end of the string 13 is wound around a head 19. In this way, the string 13 is stretched between the bridge 18 and the head 19.

[0019] A vibration transmission part (saddle) 20 is provided between the strings 13 and the outer surface of the top plate 14. As a result, in the guitar 1, the vibration of the strings 13 is transmitted to the top plate 14 via the vibration transmission part 20, causing the top plate 14 to vibrate, and also causing the back plate 15 and side plates 16 to vibrate. In other words, the vibration transmission part 20 is a bridge that transmits the vibration of the strings 13 to the body 11. As a result, the air inside (the cavity of) the body 11 resonates, and the sound is radiated outside the body 11.

[0020] As shown in FIG. 2, the front panel 14 includes a first panel 14a, a second panel 14b, a first intervening member 21, and a second intervening member 23. The first panel 14a and the second panel 14b have the same shape and are stacked in the vertical direction. The first panel 14a and the second panel 14b may each be made of wood. The first intervening member 21 and the second intervening member 23 may each be made of wood. The wood used in the first panel 14a and the second panel 14b and the wood used in the first intervening member 21 and the second intervening member 23 may be the same type of wood or different types of wood. The wood used in the first intervening member 21 and the wood used in the second intervening member 23 may be the same type of wood or different types of wood. The first intervening member 21 and the second intervening member 23 are not limited to wood. The first intervening member 21 may be a sheet-shaped wood such as paper, or a sheet-shaped plastic material. The second intervening member 23 may be a block of wood having higher rigidity than the first intervening member 21, or a block of plastic material.

[0021] The first plate 14a has a first surface 24a facing the second plate 14b and an outer surface (third surface) 24b opposite to the first surface 24a. The outer surface 24b of the first plate 14a is the outer surface of the top plate 14. In other words, the vibration transmitter 20 shown in FIG. 1 is disposed on the outer surface 24b of the first plate 14a.

[0022] The second plate 14b has a second surface 24c that faces the first surface 24a of the first plate 14a, and a back surface 24d on the opposite side to the second surface 24c. The back surface 24d of the second plate 14b corresponds to the back surface on the opposite side to the outer surface of the front plate 14, and is the surface that faces the back plate 15.

[0023] The first intervening member 21 and the second intervening member 23 are disposed between the first surface 24a of the first plate 14a and the second surface 24c of the second plate 14b. In other words, the first intervening member 21 and the second intervening member 23 are in contact with the first surface 24a of the first plate 14a and the second surface 24c of the second plate 14b, and are sandwiched between the first plate 14a and the second plate 14b.

[0024] The first intervening member 21 is disposed on at least a portion of the first surface 24a. The first intervening member 21 has walls 22 arranged in a mesh-like manner when the first intervening member 21 is viewed in a direction perpendicular to the first surface 24a, i.e., in the up-down direction. As shown in FIG. 2, for example, the walls 22 have a honeycomb structure. The honeycomb structure has a structure in which regular hexagonal spaces surrounded by a plurality of walls are arranged without gaps. However, the structure of the walls 22 is not limited to the honeycomb structure. The walls 22 have a structure in which polygonal spaces including triangular, rectangular, and hexagonal spaces surrounded by a plurality of walls are arranged without gaps.

[0025] FIG. 3 is an enlarged perspective view of a part of the first intervening member 21 shown in FIG. 2. As described above, the wall portion 22 of the first intervening member 21 has a honeycomb structure. The wall portion 22 has a height h in the vertical direction. In other words, the first intervening member 21 has a height h in the vertical direction. The height h in the vertical direction of the first intervening member 21 corresponds to the distance between the first surface 24a of the first plate 14a and the second surface 24c of the second plate 14b. Note that FIG. 3 shows that the wall portion 22 of the first intervening member 21 has a structure that is open in the vertical direction. However, the structure of the first intervening member 21 is not limited to the structure shown in FIG. 3. For example, the first intervening member 21 may have a floor portion and a roof portion that close the wall portion 22 in the vertical direction. The floor portion and the roof portion may be common to the entire wall portion 22. The first intervening member 21 may have a plurality of polygonal spaces surrounded by the walls that constitute the floor portion, the roof portion, and the wall portion 22.

[0026] Returning to FIG. 2, the second intervening member 23 will be described. The second intervening member 23 is disposed adjacent to the first intervening member 21 on at least a portion of the first surface 24a. The second intervening member 23 has the same height as the height h of the first intervening member 21 in the vertical direction, and is bonded to the first surface 24a and the second surface 24c. The second intervening member 23 has a higher rigidity than the first intervening member 21. As shown in FIG. 2, the second intervening member 23 includes a first portion 23a, a second portion 23b, a third portion 23c, and a fourth portion 23d.

[0027] The first portion 23a faces the sound hole 17 provided in the first plate 14a and is disposed so as to surround the sound hole 17. In FIG. 2, the first portion 23a is disposed continuously so as to surround the entire periphery of the sound hole 17. However, the position of the first portion 23a around the sound hole 17 is not limited to this. For example, the first portion 23a may be disposed discontinuously around the sound hole 17 so as to face the sound hole 17. By disposing the first portion 23a so as to surround the sound hole 17, the rigidity around the sound hole 17 can be ensured. On the other hand, since the cross section of the top plate 14 facing the sound hole 17 is visible to the human eye, it is preferable that the first portion 23a is disposed continuously so as to surround the entire periphery of the sound hole 17 so that the first intervening member 21 having the honeycomb structure is not visible to the human eye, in consideration of the beauty of the appearance.

[0028] The second portion 23b is disposed at least in a portion of the first surface 24a that overlaps with the vibration transmitting portion 20 provided on the top plate 14. As described above, the outer surface 24b of the first plate 14a opposite the first surface 24a is the outer surface of the top plate 14, and the vibration transmitting portion 20 is disposed on the outer surface 24b. The second portion 23b is disposed at a position on the first surface 24a that overlaps with the vibration transmitting portion 20 provided on the outer surface 24b. By disposing the second portion 23b so as to overlap with the vibration transmitting portion 20, the rigidity of the top plate 14 that overlaps with the position where the vibration transmitting portion 20 is provided can be ensured.

[0029] The third portion 23c is disposed on the first surface 24a between the first portion 23a and the second portion 23b. In other words, the third portion 23c is disposed between the sound hole 17 and a portion of the first surface 24a that overlaps with the vibration transmitter 20 provided on the top plate 14, that is, at a position that overlaps with a part of the portion where the strings 13 are arranged. By disposing the third portion 23c between the first portion 23a and the second portion 23b, it is possible to ensure the rigidity between the first portion 23a and the second portion 23b.

[0030] The fourth portion 23d is disposed on the first surface 24a at the outer edge of the first plate 14a. By disposing the fourth portion 23d on the outer edge of the first plate 14a, the rigidity of the outer edge of the first plate 14a can be ensured. In FIG. 2, the fourth portion 23d is disposed continuously over the entire outer edge of the first plate 14a. However, the position of the fourth portion 23d on the outer edge of the first plate 14a is not limited thereto. For example, the fourth portion 23d may be disposed discontinuously on the outer edge of the first plate 14a. As shown in FIG. 2, the first intervening member 21 is disposed on the first surface 24a in a portion where the second intervening member 23 is not disposed.

[0031] FIG. 4 is a cross-sectional view of the first plate 14a taken along A1-A2 in FIG. 2. FIG. 5 is a cross-sectional view of the front plate 14 corresponding to the cross-sectional view of the first plate 14a taken along A1-A2 in FIG. 4. As shown in FIG. 4 and FIG. 5, the first intervening member 21 and the second intervening member 23 (23a, 23b, 23c, 23d) arranged on the first surface 24a of the first plate 14a have the same height h in the vertical direction. As described above, the first intervening member 21 and the second intervening member 23 (23a, 23b, 23c, 23d) are arranged between the first plate 14a of the front plate 14 and the second plate 14b shown in FIG. 2, and contact the first surface 24a of the first plate 14a and the second surface 24c of the second plate 14b. In addition, the second intervening member 23 is bonded to the first surface 24a and the second surface 24c.

[0032] The second intervening member 23 has a higher rigidity than the first intervening member 21. When the second intervening member 23 is made of wood, the grain direction of the second portion 23b and the grain direction of the third portion 23c of the second intervening member 23 may be the same or different. It is preferable to adjust the grain direction of the second portion 23b and the grain direction of the third portion 23c according to the desired acoustic characteristics and strength of the guitar 1. By adjusting the grain direction of the second portion 23b and the grain direction of the third portion 23c, the acoustic characteristics of the guitar 1 can be adjusted and the strength provided by the second intervening member 23 can be adjusted.

[0033] FIG. 6 is a diagram for explaining the grain direction of the second portion 23b and the grain direction of the third portion 23c of the second intervening member 23 shown in FIG. 2. FIG. 6 shows, as an example, a case where the grain direction Gb of the second portion 23b is parallel to the left-right direction and the grain direction Gc of the third portion 23c is parallel to the front-rear direction. That is, the angle between the grain direction Gb of the second portion 23b and the grain direction Gc of the third portion 23c is 90°. However, the angle between the grain direction Gb and the grain direction Gc is not limited to 90°. In wood, the strength in a direction parallel to the grain direction is higher than the strength in a direction other than the grain direction. Therefore, the grain direction of the second portion 23b or the third portion 23c is adjusted according to the direction in which strength is desired to be given.

[0034] Also, the grain directions of the top plate 14 and the back plate 15 of the body 11 of the acoustic guitar 1 are usually parallel to the front-rear direction. When the first plate 14a is made of wood, the angle between the grain direction of the first plate 14a and the grain direction Gb of the second portion 23b may be larger than the angle between the grain direction of the first plate 14a and the grain direction Gc of the third portion 23c. For example, the angle between the grain direction of the first plate 14a and the grain direction G of the second portion 23b may be approximately 90°. Also, the grain direction of the first plate 14a and the grain direction G of the third portion 23c may be approximately parallel, and the angle between them may be approximately 0°. In this way, by adjusting the grain direction Gb of the second portion 23b and the grain direction Gc of the third portion 23c, it is possible to improve the strength of the body 11 and achieve the desired acoustic characteristics at the same time.

[0035] The structure of the back plate 15 of the guitar 1 will be described with reference to FIG. 7. FIG. 7 is an exploded view of the back plate 15 of the body 11 shown in FIG. 1. The back plate 15 includes a third plate 15a, a fourth plate 15b, a first intervening member 21, and a second intervening member 23. The third plate 15a and the fourth plate 15b have the same shape and are stacked in the vertical direction. The third plate 15a and the fourth plate 15b may each be made of wood. The wood used in the third plate 15a and the fourth plate 15b and the wood used in the first plate 14a and the second plate 14b of the top plate 14 may be the same type of wood or different types of wood. The first intervening member 21 and the second intervening member 23 are the same as the first intervening member 21 and the second intervening member 23 in the first plate 14.

[0036] The third plate 15a has a first surface 25a facing the fourth plate 15b and an outer surface 25b opposite the first surface 25a. The outer surface 25b of the third plate 15a is the outer surface of the back plate 15. In other words, the outer surface 25b of the third plate 15a faces the player who plays the guitar 1 when the guitar 1 is played.

[0037] The fourth plate 15b has a second surface 25c facing the first surface 25a of the third plate 15a, and a back surface 25d opposite the second surface 25c. The back surface 25d of the fourth plate 15b corresponds to the back surface opposite the outer surface 25b of the third plate 15a, and is the surface facing the top plate 14, specifically, the second plate 14b of the top plate 14. At least one sound bar 71 is provided on the back surface 25d. The sound bar 71 may be omitted.

[0038] The first intervening member 21 and the second intervening member 23 are disposed between the first surface 25a of the third plate 15a and the second surface 25c of the fourth plate 15b. In other words, the first intervening member 21 and the second intervening member 23 are in contact with the first surface 25a of the third plate 15a and the second surface 25c of the fourth plate 15b, and are sandwiched between the third plate 15a and the fourth plate 15b.

[0039] As shown in FIG. 7, unlike the top plate 14, the back plate 15 does not have a sound hole 17. Therefore, the position where the second intervening member 23 is arranged on the back plate 15 is different from the position where the second intervening member 23 is arranged on the top plate 14. On the back plate 15, the second intervening member 23 is arranged on the outer edge of the third plate 15a on the first surface 25a of the third plate 15a. By arranging the second intervening member 23 on the outer edge of the third plate 15a, the rigidity of the outer edge of the third plate 15a can be ensured. As shown in FIG. 6, the first intervening member 21 is arranged on the portion of the first surface 25a where the second intervening member 23 is not arranged.

[0040] As described with reference to Figures 1 to 7, guitar 1 includes first intervening member 21 and second intervening member 23 in top plate 14 and back plate 15 that constitute body 11. By including first intervening member 21 having walls 22 arranged in a net pattern, body 11 can be made lighter and desired acoustic characteristics can be achieved. Furthermore, by including second intervening member 23, the rigidity of top plate 14 and back plate 15 can be ensured, and the strength of body 11 can be maintained.

[0041] 2 and 7. The position where the second intervening member 23 is arranged can be adjusted according to the position where desired acoustic characteristics and rigidity are to be imparted. By adjusting the position where the second intervening member 23 is arranged, the acoustic characteristics and rigidity of the body 11 can be controlled.

[0042] An example of a method for manufacturing a soundboard according to this embodiment will be described below with reference to Figures 8 to 12. Specifically, an example of a method for manufacturing the top panel 14 will be described below. Although illustrations and explanations are omitted, the back panel 15 is also manufactured in the same manner as the top panel 14. Figures 8 to 12 show a cross section of the top panel 14 taken along B1-B2 in Figure 2 as viewed from the front-to-rear direction.

[0043] First, the first intervening member 21 and the second intervening member 23 are disposed on the first surface 24a of the first plate 14a. Specifically, as shown in FIG. 8, the first intervening member 21 is disposed on the first surface 24a of the first plate 14a. As described above, the first intervening member 21 has the wall portion 22 arranged in a net shape when the first intervening member is viewed in a direction perpendicular to the first surface 24a. For example, as shown in FIG. 3, the wall portion 22 has a honeycomb structure in which regular hexagonal spaces surrounded by a plurality of walls are arranged without gaps. The wall portion 22 has a height h in the vertical direction. In other words, the first intervening member 21 has a height h in the vertical direction.

[0044] 9, at least a portion of the first intervening member 21 is removed to expose the first surface 24a of the first plate 14a. The position from which the first intervening member 21 is removed is the position on the first surface 24a where the second intervening member 23 will be disposed.

[0045] 10, the second intervening member 23 is disposed on the first surface 24a exposed by removing the first intervening member 21. The second intervening member 23 is adhered to the first surface 24a by an adhesive (not shown) or the like. In this manner, the first intervening member 21 and the second intervening member 23 are disposed on the first surface 24a of the first plate 14a.

[0046] Next, as shown in Fig. 11, the second plate 14b opposing the first plate 14a is placed on the first intervening member 21 and the second intervening member 23. The second plate 14b is adhered to the second intervening member 23 by an adhesive (not shown) or the like. In this way, the front plate 14 can be manufactured. Although not shown, the back plate 15 can also be manufactured by a method similar to the manufacturing method of the front plate 14 described with reference to Figs. 8 to 11.

[0047] Thereafter, as shown in Fig. 12, sound hole 17 is formed in top plate 14. Sound hole 17 is formed by forming a substantially circular hole penetrating top plate 14 at a predetermined position of top plate 14. As shown in Fig. 12, the position where the hole penetrating top plate 14 is formed overlaps with the position where second intervening member 23 is disposed. Second intervening member 23 has greater rigidity than first intervening member 21. Therefore, when forming the hole penetrating top plate 14, distortion or deformation of second intervening member 23 around the hole is prevented. In the manufacturing process of back plate 15, the process of forming sound hole 17 is omitted.

[0048] If the first plate 14a and the second plate 14b are a single rectangular plate, that is, if the first plate 14a and the second plate 14b are not cut into a guitar shape in advance, when the sound hole 17 is formed in the top plate 14, the top plate 14 may be individually divided into guitar shapes at the same time, and multiple guitar-shaped top plates 14 may be formed from the first plate 14a and the second plate 14b.

[0049] As described above, the front plate 14 and the back plate 15 of the body 11 are manufactured. In the manufacturing method of the front plate 14 or the back plate 15 according to this embodiment, the processing step of forming recesses in the first plate 14a for filling the first intervening member 21 and the second intervening member 23 can be omitted. This simplifies the manufacturing process, and makes it easier to process the front plate 14 and the back plate 15. In addition, since it is not necessary to form recesses for filling the first intervening member 21 and the second intervening member 23, no loss of the first plate 14a and the third plate 15a occurs.

[0050] [Variations] Below, modified examples of the soundboard and the method of manufacturing the soundboard of the present invention will be described.

[0051] (Variation 1) The manufacturing method of the front plate 14 described with reference to Figures 8 to 12 is one example of the manufacturing method of the front plate 14 according to this embodiment, and is not limited thereto. For example, the first intervening member 21 may be patterned in advance. In this case, by arranging the patterned first intervening member 21 at a predetermined position on the first surface 24a of the first plate 14, the step of removing at least a portion of the first intervening member 21 can be omitted.

[0052] (Variation 2) In the manufacturing method of the front panel 14 described with reference to Figures 8 to 12, the first intervening member 21 is placed on the first surface 24a of the first panel 14, and then the second intervening member 23 is placed. However, it is also possible to place the second intervening member 23 on the first surface 24a of the first panel 14, and then place the first intervening member 21.

[0053] 13 to 15 are diagrams illustrating a manufacturing method of the front plate 14 according to Modification 2. As shown in Fig. 13, the second intervening member 23 is disposed on the first surface 24a of the first plate 14a. Then, as shown in Fig. 14, at least a portion of the second intervening member 23 is removed to expose the first surface 24a of the first plate 14a. The position from which the second intervening member 23 is removed is the position on the first surface 24a where the first intervening member 21 will be disposed.

[0054] Thereafter, as shown in Fig. 15, the first intervening member 21 is disposed on the first surface 24a exposed by removing the second intervening member 23. The subsequent steps are similar to those described with reference to Figs. 11 and 12. Figs. 13 and 14 have described a case in which the second intervening member 23 is a single plate that is not patterned in advance. However, if the second intervening member 23 is patterned in advance, the step of removing at least a portion of the second intervening member 23 from the first surface 24a is omitted.

[0055] (Variation 3) In the above embodiment, it has been described that the second intervening member 23 is adhered to the first surface 24a of the first plate 14a and the second surface 24c of the second plate 14b, respectively. When the first intervening member 21 has a floor portion and a roof portion that close the wall portion 22 in the up-down direction, in addition to the second intervening member 23, the floor portion and the roof portion of the first intervening member 21 may be adhered to the first surface 24a of the first plate 14a and the second surface 24c of the second plate 14b, respectively, by an adhesive or the like.

[0056] (Variation 4) The first plate 14a and the second plate 14b may each be a single rectangular plate before being cut into the shape of a guitar, or the first plate 14a and the second plate 14b may each be patterned in advance to match the shape of the body 11 of the guitar 1.

[0057] (Variation 5) In the above embodiment, the positions where the second intervening member 23 is arranged in the top plate 14 are around the sound hole 17, a position overlapping with the vibration transmitting section 20, a position overlapping with a position between the sound hole 17 and the vibration transmitting section 20, and the outer edge of the top plate 14. In the back plate 15, the second intervening member 23 is arranged on the outer edge of the back plate 15. However, the positions where the second intervening member 23 is arranged are not limited thereto. For example, in addition to the positions where the second intervening member 23 is arranged in the above embodiment, the second intervening member 23 may be arranged on the first surface 24a of the first plate 14a and / or the first surface 25a of the third plate 15a so as to be along the center in the left-right direction of the top plate 14 and / or the back plate 15. By arranging the second intervening member 23 so as to be along the center in the left-right direction of each of the top plate 14 and the back plate 15, the strength of the center portion in the left-right direction of each of the top plate 14 and the back plate 15 can be increased.

[0058] (Variation 6) In the above embodiment, the second intervening member 23 is disposed on the first surface 25a of the third plate 15a of the back plate 15 at the outer edge of the third plate 15a. However, the position at which the second intervening member 23 is disposed on the back plate 15 is not limited thereto. For example, in addition to the position at which the second intervening member 23 is disposed in the above embodiment, the second intervening member 23 may be disposed on the first surface 25a along the Y direction at the center in the X direction of the third plate 15a. In addition to the position at which the second intervening member 23 is disposed in the above embodiment, the second intervening member 23 may be disposed on the first surface 25a along the X direction inside the outer edge of the third plate 15a. [Explanation of symbols]

[0059] 1: Guitar, 11: Body, 12: Neck, 13: Strings, 14: Top board, 14a: 1st board, 14b: 2nd board, 15: Back board, 15a: 3rd board, 15b: 4th board , 16: side plate, 17: sound hole, 21: first intervening member, 23: second intervening member, 23a: first part, 23b: second part, 23c: third part, 23d: fourth part

Claims

1. a first plate including a first surface; a second plate including a second surface opposite the first surface; a first intervening member in contact with the first surface and the second surface, the first intervening member having a wall portion arranged in a net shape when the first intervening member is viewed in a direction perpendicular to the first surface; a second interposed member bonded to the first surface and the second surface and having a greater rigidity than the first interposed member; Soundboard including.

2. The first plate and the second plate have a hole penetrating therethrough, The soundboard of claim 1 , wherein the second intervening member includes a first portion facing the hole.

3. A piece is arranged on a third surface of the first board opposite to the first surface, 3. The soundboard according to claim 2, wherein the second intervening member includes a second portion that overlaps with the bridge when the bridge is viewed in a direction perpendicular to the first surface.

4. The soundboard of claim 3 , wherein the second intervening member includes a third portion disposed between the first portion and the second portion.

5. the second interposed member is wood, 5. The soundboard of claim 4, wherein the grain direction of said second portion is different from the grain direction of said third portion.

6. the first board is made of wood; 6. The soundboard of claim 5, wherein an angle between a grain direction of said first board and a grain direction of said second portion is greater than an angle between a grain direction of said first board and a grain direction of said third portion.

7. The soundboard of claim 2 , wherein the second intervening member includes a fourth portion facing an outer edge of the first board.

8. The strings vibrate when the player operates them, A soundboard according to any one of claims 1 to 7; A bridge that transmits the vibration of the strings to a soundboard; Including, musical instruments.

9. A first interposing member and a second interposing member are disposed on the first plate; covering the first interposition member and the second interposition member with a second plate; Including, the first intervening member is in contact with a first surface of the first plate and a second surface of the second plate; the second interposed member is bonded to the first surface and the second surface; The first surface and the second surface are opposed to each other, the first intervening member has walls arranged in a mesh pattern when the first intervening member is viewed in a direction perpendicular to the first surface, The second intervening member has a greater rigidity than the first intervening member. How a soundboard is made.

10. The disposing of the first interposition member and the second interposition member includes: The first interposed member is disposed on the first surface of the first plate; removing at least a portion of the first interposed member to expose the first surface; disposing the second intervening member on the exposed first surface; A method for manufacturing the soundboard of claim 9, comprising:

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