JPS5937515B2 - Method for manufacturing straight keyboards for keyboard instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a straight keyboard for a keyboard instrument.

Conventionally, when manufacturing a straight keyboard to be incorporated into a keyboard instrument such as a piano, first, a board of a predetermined size was made by making a plurality of keyboard materials made of rainbow pine, blues, etc., and then a board was placed on top of this board. Draw a diagram of the keyboard and cut it according to the diagram to make a predetermined number of white and black key materials. Next, attach the top surface plate and front surface plate made of acrylic resin, ivory, etc. to the white key material. A white key is made by applying a prescribed process to the material, and a top surface material made of phenol resin, ebony, etc. is attached to the black key material and a prescribed process is applied to make a black key.

However, in this conventional manufacturing method,
The white key material and the black key material are not always made from a single piece of keyboard material, but are sometimes made from a section of two pieces of keyboard material put together in a square shape. Because it has a two-layer structure throughout, it may warp or twist under the influence of temperature and other factors, which may impair the quality and function of the piano. A considerable amount of leftover material is generated when making planks,
This method has the drawbacks of poor yield, increased costs, and if a key is damaged during manufacturing, a special key must be made to match the key.

This invention was made in view of the above circumstances, and it is possible to obtain keys that are unlikely to warp or twist for all keys, and also to reduce costs by reducing residual material and improving yield. The purpose of this invention is to provide a method for manufacturing a straight keyboard for a keyboard instrument, which can be made from a plurality of straight square sticks, and which eliminates the need to specially make a corresponding key even if the key is damaged. A white key image material is glued and interposed between each end of the white key material, and a white key is manufactured by cutting these white key image materials.

An embodiment of the present invention will be described below with reference to the drawings.

First, as shown in FIG.
A plurality of white key image materials 2 each made of a rectangular parallelepiped whose height, width, and length are finished to predetermined dimensions are prepared.

Incidentally, the white key material 1 and the white key image material 2 are made of rainbow pine, souvre, or the like.

As an example, as shown in FIG. 2, white key image materials 2a and 2b are placed between one end of each of the three white key materials 1a to 1c.
The four white key materials 1d~
The white key image materials 20 to 2e are adhered and interposed between one end of each of the pieces 1g.

Next, as shown in FIG. 3, a top surface layer plate 3a and a front surface layer plate 4a having shapes corresponding to three white keys are prepared, and a top surface layer plate 3b and a front surface layer plate 4a having shapes corresponding to four white keys are prepared. Prepare the front surface layer play 1-4b.

In addition, these surface plates 3a, 4a, 3b, 4
b is made of acrylic resin or the like.

Then, as shown in FIG. 4, three white key materials 1a to 1
The upper surface layer plate 3a is attached to the upper surface of c and the white key image materials 2a and 2b, and the front surface layer plate 4a is attached to the front surface, respectively, and the four white key materials 1d to 1g and the white key image materials 10 to
The upper surface layer plate 3b is pasted on the upper surface of 1e, and the front surface layer plate 4b is pasted on the front surface, respectively.After this, the white key image materials 2a to 2e, etc. are cut into pieces at the locations indicated by the dashed-dotted lines in the same figure, respectively.
As a result, seven white keys 5a to 5g corresponding to one octave are obtained as shown in FIG.

Next, as shown in FIG.
A plurality of upper surface layer materials 7 each having a substantially trapezoidal cross section and whose height, width, length, etc. are finished to predetermined dimensions are prepared.

It should be noted that the black key material 6 is made of rainbow pine, subluce, or the like, and the upper surface layer material 7 is made of phenol resin or the like.

Then, by pasting the upper surface layer material 7 on the front upper surface of the black key material 6, a black key 8 is obtained as shown in FIG.

Therefore, the seven white keys 53~ obtained as described above
5g and five black keys 8, as shown in FIG.
■A straight key corresponding to an octave is obtained, and in the same manner, a straight key corresponding to one piano is obtained.

In the above embodiment, the top surface plate and the front surface plate for the white keys have shapes corresponding to three white keys and shapes corresponding to four white keys, but the shape is not limited to this, and various shapes may be used. Deformable.

For example, the shape may correspond to seven white keys (equivalent to one octave), or the shape may correspond to fourteen white keys (equivalent to two octaves).

In addition, the top surface layer plate and the front surface layer plate are attached in advance.
White key image material 2
It may be pasted before or after grinding.

As explained in detail above, according to the method of manufacturing a straight keyboard for a keyboard instrument according to the present invention, a white key drawing material is bonded and interposed between one end of each of a plurality of straight white key materials, and Since the white keys are manufactured by cutting the white key drawing material into pieces, the main bodies of all the white keys can be constructed from a single material, that is, the white key material, and therefore the black keys can also be made straight. If you make a black key material with a straight corner, you can obtain keys that are less likely to warp or twist, which in turn improves quality and function. Since you only need to prepare a stick, you can make white key materials and black key materials with as little leftover material as possible, and you only need to prepare a relatively small piece as a white key drawing material, so this white key It is now possible to make painting materials from leftover materials, and as a result, the generation of leftover materials can be extremely reduced, yields can be greatly improved, and costs can be reduced. Even if a key is damaged, there is no need to make a special key for this key, and other key materials can be used as is.In addition, there is no need for a large machine dedicated to sawing, so it can be used exclusively for sawing. This has the advantage of making it possible to downsize the machine and also enable continuous production.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view showing a white key material and a white key image material, and FIG. 2 shows a state in which a white key image material is glued and interposed between white key materials. Perspective view shown, 3rd
The figure is a perspective view showing the top surface layer plate and front surface layer plate for a white key, FIG. Figure 6 is a perspective view showing a white key that has been cut into pieces, Figure 6 is a perspective view showing the black key material and its upper surface layer material, Figure 7 is a perspective view showing the black key, and Figure 8 is a perspective view showing one octave. It is a perspective view showing a key. 1.13~1g...White key material, 2,2a~2e
...White key drawing material, 3a, 3b...
Top surface plate, 4a, 4b...Front surface plate, 5a to 5g...White key, 6...
・Black key material, 7...Top surface material, 8...
・Black key.

Claims (1)

[Claims] 1. A white key drawing material is glued and interposed between each end of a white key material consisting of a plurality of straight square rods, and then these white key drawing materials are cut to produce a white key. A method of manufacturing a straight keyboard for a keyboard instrument.