JPH113074A - Hammer for piano, method for manufacturing the same, and piano - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent deformation of a tip portion when attaching a felt to the tip side of a hammerwood. SOLUTION: A large pressure is applied to a tip 8 when the hammer felts 10 and 12 are rolled up by a strong force, but the tip 8 of the synthetic material 6 for hammer wood is a maple wood veneer having a higher density than the base 9. Since the front end 8 is formed thinner than the base 9, the front end 8 does not break, bend, or collapse. Therefore, the yield in manufacturing can be improved.
Moreover, instead of making the entire hammerwood a dense material,
Since the maple wood veneer 4 having a high density is used only for the thin tip portion 8, the stringing characteristics of the hammer using the hammer wood are hardly affected.
Therefore, a piano incorporating such a piano hammer can also obtain the same characteristics as before.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piano hammer, a method for manufacturing the same, and a piano incorporating the piano hammer.

[0002]

2. Description of the Related Art Since a hammer of a piano is a component that directly strikes a string, the hammering characteristics of the hammer are extremely important in determining the performance of the piano, such as timbre, tone quality, sound balance, and touch feeling. . One of the characteristics required of such a hammer is a contact time and a contact point with a string at the time of striking.

In order to adjust the contact time and the contact point, methods such as adjusting the thickness of a hammer felt and narrowing the tip of a hammer wood have been used.

[0004]

However, if the tip of the hammer wood is made thinner to improve the stringing characteristics, the hammer wood cannot withstand the pressure received during the work of winding the hammer felt around the tip. , The tip of the hammerwood breaks, bends, or collapses,
The yield sometimes decreased.

[0005] The present invention provides a piano hammer, a method of manufacturing the same, and a piano, which can improve the yield at the time of attaching the felt to the tip side of the hammer wood and prevent the occurrence of defective products. It is intended for.

[0006]

Means for Solving the Problems and Effects of the Invention The hammer for a piano according to the present invention is characterized in that a material having a higher density than the base side of the hammer wood is used at the tip end of the hammer wood to which the hammer felt is attached. I do.

[0007] Usually, the density of mahogany, spruce, rawan and the like is 0.4 to 0.5 over the entire hammerwood.
Although a material of 6 g / cm ³ is used, in the hammer for a piano of the present invention, a material having the same density as the conventional one (for example, the above-described mahogany, spruce and lauan) is used on the base side of the hammer wood. On the tip side of the wood, a material having a high density (for example, maple, beech and oak) having a density of 0.7 g / cm ³ or more, especially 0.7 to 0.9
g / cm ³ ). For this reason, it can withstand the pressure when installing the hammer felt,
A high yield can be realized without the tip side of the hammerwood being bent, bent or crushed.

Moreover, since the entire hammer wood is not made of a high-density material but is used only on the tip side, the hammer wood has almost no influence on the stringing characteristics of the hammer, and a piano incorporating such a piano hammer is used. Can also obtain the same characteristics as before. The production of the hammer woods having different densities on the tip side and the base side is performed, for example, as follows.

That is, a hammerwood base material;
A hammerwood tip material having a higher density than the hammerwood base material is joined with one surface of each as a joining surface to form one synthetic material, and the hammerwood tip material side is cut into a sharpened shape. A hammer for piano is formed by attaching a hammer felt to the material for the tip of the hammer wood and slicing it almost perpendicularly to the joining surface.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As one embodiment of the present invention, a method for manufacturing a piano hammer will be described. First, a mahogany wood veneer 2 (corresponding to a hammerwood base material) and a maple wood veneer 4 (corresponding to a hammerwood tip material) shown in FIG. As 4a, it is joined by an adhesive and cut into sides, and a single hammerwood synthetic material 6 having a width W1 of about 1000 mm and a thickness T1 of 10 mm shown in FIG. 1B is manufactured. Here, the mahogany wood veneer 2 has a density of 0.4 to 0.6 g /
cm ³ (particularly 0.50 to 0.55 g / cm ³ ), and the density of the maple wood veneer 4 is 0.7 g / cm ³
The above (particularly 0.7 to 0.9 g / cm ³ ) is used.

Next, the hammerwood synthetic material 6 is
As shown in the figure, one end in the direction orthogonal to the joining surface of the wood veneers 2 and 4, that is, one end in the direction of the arrow Y, that is, both the front and back surfaces of the maple wood veneer 4 side are cut to form a thin end portion 8.
The other end in the direction of arrow Y, that is, the front and back surfaces of the mahogany wood veneer 2 are left thick to form the base 9. Adjustment of the thickness of the tip 8 by this cutting is performed so that the tip 8a on the low frequency range side is hardest because it is hardly cut, and the tip 8b on the high frequency range is thinnest.
It is cut into a tapered shape.

Next, as shown in FIG. 3, an under felt 10 and a top felt 12 serving as a hammer felt are applied to the tip 8, and the tip 8 is wrapped around as shown by the arrow in FIG. Fix with adhesive. This state is shown in FIG. Hammer felt 10,1
2 is formed so as to be thickest at the front end portion 8a on the low frequency range side and thinnest at the front end portion 8b on the high frequency range side.

Next, an integrated body of the hammerwood synthetic material 6 and the hammer felts 10 and 12 is joined to the joining surfaces 2a and 4a.
Each hammerwood is separated and formed by cutting a surface substantially perpendicular to the direction (X direction) (Y direction) as a cut surface. Thereby, as shown in FIG. 5, the tip 8 of the hammer wood 20 in the low range is thick, the tip 8 of the hammer wood 22 in the middle range is slightly thin, and the tip 8 of the hammer wood 24 for the high range is the most. In accordance with this, the hammerwoods 20 to 24 are formed in a shape in which the hammer felts 10 and 12 become thinner sequentially from the bass side to the treble side, and the hammerwood row 30 for one piano is completed.

The configuration itself having such a tapered thickness is the same as a conventional hammerwood. However, as shown in FIG.
When a large pressure is applied to the distal end portion 8 when rolling in 0 and 12, the characteristics of the hammerwood synthetic material 6 of the present embodiment are exhibited. That is, since the tip 8 is formed from the maple wood veneer 4 having a higher density than the base 9, even if the tip 8 of the hammerwood synthetic material 6 is formed thinner than the base 9. It does not break, bend, or collapse as in the past. Therefore, the yield in manufacturing can be improved.

In addition, the entire hammer woods 20 to 24 are not made of a high-density material, and the high-density maple wood veneer 4 is used only for the thin end portion 8. For this reason, there is no significant change in the density of the entire hammer woods 20 to 24, and the hammering using the hammer woods 20 to 24 hardly affects the stringing characteristics. Therefore, a piano incorporating such a piano hammer can also obtain the same characteristics as before.

[Others] In the above-described embodiment, the joining surfaces 2a and 4a are, as shown in FIG.
6 and 28, the joining surfaces 2b and 4b are oblique to the front and back surfaces 26 and 28 as shown in FIG. As shown in FIG. 6 (c), the bonding surfaces 2c and 4c may be uneven, and as shown in FIG. 6 (d), the bonding surface 2 may have a V-shaped cross section.
d, 4d, or the joining surfaces 2e, 4e having an inverted V-shaped cross section as shown in FIG.

In the above embodiment, the bass range, the midrange range,
Hammerwood 20, 22, 24 for all ranges of the treble range
In order to cut out the material, one hammerwood synthetic material 6 was used. However, since the tip 8 is relatively thick especially in the low-frequency range, the low-frequency range does not use the hammerwood synthetic material 6, and the mahogany wood veneer is used as a single piece. The hammer wood 20 may be formed with only 2 pieces.

Instead of using the same density maple wood veneer 4 as the tip 8, the mahogany wood veneer 2 is used.
With the use of a plurality of materials having higher densities, as the sound shifts from the low frequency range to the mid frequency range and the high frequency range, the hammer woods 20 to 2
The material may be changed so as to gradually increase the density of the material of the front end portion 8 of 4. Further, instead of dividing the density of the material of the distal end portion 8 into three ranges of a low range, a middle range, and a high range, the material of the tip 8 may be divided into two or four or more according to the range.

Further, all of the thinned portions in the high frequency range are the high density maple wood veneers 4, but in particular, the tip portion 8 which receives a large pressure when the hammer felts 10 and 12 are attached. Further, it may be a part of the tip side. In the above-described embodiment, the hammerwood synthetic material 6 corresponding to the entire sound range is formed, the hammer felts 10, 12 are bonded, and then the hammer woods 20, 22, 24 are cut out. It is also possible to separately form the plate material for the hammerwood for the middle and high range and the hammerwood 20 for the low range and the hammerwood 22 and 24 for the middle and high range from each other.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a manufacturing process for forming a hammerwood synthetic material from a mahogany wood veneer and a maple wood veneer.

FIG. 2 is an explanatory view showing a state in which a tip side of a hammerwood synthetic material is cut.

FIG. 3 is an explanatory view of a step of attaching a hammer felt to a tip end side of a synthetic material for hammer wood.

FIG. 4 is an explanatory view showing a state in which a hammer felt is attached to a tip end side of a synthetic material for hammer wood.

FIG. 5 is an explanatory diagram of a state of a hammer wood cut out of a hammer wood synthetic material to which a hammer felt is attached.

FIG. 6 is an explanatory diagram of a shape example of a joint surface between a mahogany wood veneer and a maple wood veneer.

[Explanation of symbols]

2: Mahogany wood veneer 2a, 4a: Joining surface 2b, 4b: Diagonal joining surface 2c, 4c: Uneven joining surface 2d, 4d: V-shaped joining surface 2e, 4e: Inverted V-shaped joining surface Joining surface 4 ... Maple wood veneer 6 ... Synthetic material for hammer wood 8 ... Tip 8a ... Tip on the low range 8b ... Tip at the high range 9 ... Base 10 ... Under felt 12 ... Top felt 20,22, 24: Hammerwood 26, 28 ... Front and back 30 ... Hammerwood row

Claims (9)

[Claims] 1. A piano hammer, wherein a material having a higher density than a base side of the hammer wood is used at a tip side of the hammer wood to which the hammer felt is attached. 2. The density of the material on the base side of the hammerwood is 0.4 to 0.6 g / cm ³ , and the density of the material on the tip side of the hammerwood is 0.7 g / cm ³ or more. The hammer for a piano according to claim 1, wherein: 3. The piano hammer according to claim 1, wherein the density of the material on the tip side of the hammer wood is 0.7 to 0.9 g / cm ³ . 4. The base of the hammerwood is made of wood selected from mahogany, spruce and lauan.
2. The tip of the hammer wood is made of wood obtained from maple, beech and oak.
4. The hammer for a piano according to any one of items 1 to 3. 5. A piano incorporating the piano hammer according to claim 1. 6. A method for joining a hammerwood base material and a hammerwood tip material having a higher density than the hammerwood base material, using one surface of each as a joining surface to join the materials.
After making the two synthetic materials, the material side for the tip of the hammerwood is sharply cut, a hammer felt is attached to the material side for the tip of the hammerwood, and the hammer for piano is sliced almost perpendicularly to the joining surface. A method for manufacturing a hammer for a piano, characterized by being formed. 7. The hammerwood base material has a density of 0.4 to 0.6 g / cm ³ , and the hammerwood tip material has a density of 0.7 g / cm ³ or more. The method for manufacturing a piano hammer according to claim 6, wherein 8. The method of manufacturing a hammer for a piano according to claim 6, wherein a density of the tip material of the hammer wood is 0.7 to 0.9 g / cm ³ . 9. The hammerwood base material is wood selected from mahogany, spruce and lauan.
7. The hammerwood tipping material is wood obtained from maple, beech and oak.
9. The method for manufacturing a piano hammer according to any one of claims 8 to 8.