JP3685164B2 - Support structure for keyboard instruments - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a support structure in the middle of a keyboard instrument, which prevents mechanical noise generated from a shelf when a key is pressed.
[0002]
[Prior art]
Conventionally, as shown in FIG. 3, the support structure for the keyboard instrument in the middle is between the keyboard 21 and the shelf 22, and the shelf 22 is placed in the middle 24 with a wood screw via a metal keyboard 23. Was to fix. When a key is pressed, the force applied to the keyboard board 21 is transmitted to the shelf board 22 via the balance key pin 25 and the saddle 24, and the shelf board 22 is mechanically vibrated.
[0003]
[Problems to be solved by the invention]
However, in the support structure of a keyboard instrument that can be muted by non-stringing, when there is no performance sound due to string striking, the mechanical vibration sound generated between the keyboard and the shelf is not around the performer. There was a problem that it was transmitted to people as noise, and it made the surrounding people uncomfortable. In other words, since the performer listened to the electronic sound generated from the electronic sound source in response to keystrokes with headphones, etc., he did not notice it, but for the people around the performer, there was no pronunciation of the strings, so the stringing performance At that time, the mechanical vibration of the shelves that was not noticeable became annoying as noise.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide a keyboard instrument support structure that prevents mechanical noise generated from a shelf when a key is pressed.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a support structure for the keyboard instrument in which the inside of the keyboard for swingably supporting the keyboard is supported by the shelf board, and the vibration isolation is provided between the shelf board and the inside of the bowl. Floating and supporting the inside of the cage through a member, the shelf plate and the inside of the cage are fastened by fastening means, the fastening force of the fastening means can be adjusted, and vibration of the shelf board at the time of keying can be increased or decreased a keyframe center support structure for a keyboard instrument, characterized in that it has.
[0006]
[Action]
In the support structure for the keyboard instrument according to the first aspect of the invention, since the shelf supports the saddle through the vibration isolating member, the force at the time of keying is attenuated in the vibration isolating member. , Do not propagate to the shelf. For this reason, it is possible to prevent mechanical noise from being generated between the bag and the shelf when the key is pressed.
That is, when a key is hit, the force at that time tends to propagate into the bag, but the mechanical vibration in the bag is attenuated by the vibration isolating member. For this reason, the vibration in the basket does not propagate to the shelf board. Therefore, mechanical vibration of the shelf board at the time of keystroke is prevented. Therefore, even if the keyboard instrument is muted and played in a non-stringed state, it is possible to suppress generation of harsh noise to the surroundings.
Moreover, appropriate vibration isolation can be performed by adjusting the fastening force of the vibration isolation member with respect to the cage.
[0007]
【Example】
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a keyboard instrument support structure according to the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a support structure for a keyboard instrument according to a first embodiment of the present invention.
[0008]
As shown in FIG. 1, the support structure in the middle of a keyboard instrument according to the present invention has a stepped through hole 2 having an upper large-diameter portion and a lower small-diameter portion formed in the shelf board 1. On the upper stage of the stepped through hole 2, an upper cushion material 7 such as an anti-vibration rubber, felt, cloth, foam rubber sandwiched between iron disks 5 and 6 is placed. The upper cushion material 7 has a cylindrical shape, and concentric holes are formed in the upper cushion material 7 and the disks 5 and 6. On this disc 6, a wooden cage 3 is placed. A stepped through hole 4 is formed in the bowl 3 concentrically with the disk 5 or the like. The upper stage of the stepped through hole 4 is a counterbore for the head of the bolt 11.
[0009]
Further, a lower cushion material 8 such as an anti-vibration rubber, a felt, a cloth, a foamed rubber or the like is fitted to the lower stage of the stepped through hole 2 of the shelf board 1 from below. The lower cushion material 8 is provided with a through hole 9 concentrically with the disk 5 or the like. A nut 10 is embedded in the through hole 9.
[0010]
Then, the bolts 11 are screwed into the nuts 10 through the bolts 11 from the stepped through holes 4 of the hooks 3, so that the hooks 3 are floatingly supported by the shelf plate 1. By this floating support structure, the vibration in the cage 3 is absorbed and is not easily propagated to the shelf board 1. This is because the vibration energy is transmitted from the cage 3 to the shelf 1 via the upper cushion material 7 and the lower cushion material 8, and the upper cushion material 7 and the lower cushion material 8 heat the vibration of the cage 3. This is because vibration is transmitted to the shelf board 3 because it is converted into energy.
[0011]
As a result, the force applied to the keyboard at the time of keystroke hardly propagates to the shelf board 1 via the balance key pins 12 and 12 and the keyboard key 3. Therefore, the mechanical vibration of the shelf board 1 due to the force applied to the keyboard board is greatly reduced. Further, by changing the tightening force by the bolt 11 and the nut 10 such as the material and shape of the upper cushion material 7 and the lower cushion material 8, the force for supporting the rack 3 on the shelf board 1 can be adjusted. By this adjustment, the mechanical vibration of the shelf board 1 at the time of keystroke can be increased or decreased. Therefore, even if the keyboard instrument is played, only the original performance sound of the keyboard instrument without unnecessary noise can be enjoyed. Further, in the case of a keyboard instrument that can perform a non-stringed performance, no mechanical noise is generated from the shelf board when the key is pressed, so that no discomfort is given to the people around the performer.
[0012]
Next, the support structure for the keyboard instrument according to the second embodiment of the present invention shown in FIG. 2 will be described. This figure is a sectional view showing the support structure. In this embodiment, the bolt 13 is tightened with a nut 10 via an iron disk 16 provided on the lower surface of the lower cushion material 15 such as vibration-proof rubber, felt, cloth, foamed rubber or the like. For this reason, the basket 3 is floatingly supported on the shelf board 1 in the same manner as in the first embodiment. In the second embodiment, the sudden change of acoustic impedance, that is, the reflection of vibration can be realized by inserting the iron disk 16. Furthermore, since the thing of 2nd Example is easy to operate the nut 10 compared with the thing of 1st Example, it is easy to give the strength of the force which supports the rack 3 in the shelf board 1. FIG. Other configurations and operations are the same as those of the first embodiment.
[0013]
【The invention's effect】
As described above, according to the first aspect of the present invention, it is possible to more effectively prevent the mechanical noise generated from the shelf when the key is pressed. Furthermore, you can enjoy only the original performance sound of the keyboard instrument.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a support structure for a keyboard instrument according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a support structure in the middle of a keyboard instrument according to a second embodiment of the present invention.
FIG. 3 is a side view showing a support structure in the middle of a keyboard instrument according to a conventional example.
[Explanation of symbols]
1 shelf,
3
7 Upper cushion material (upper vibration isolation member),
8 Lower cushion material (lower vibration isolation member),
10 Nut (fastening member),
11 Bolt (fastening member).

Claims (1)

A keyboard supporting structure for a keyboard instrument in which a keyboard that swingably supports the keyboard is supported by a shelf board,
While supporting the inside of the cage in a floating manner via a vibration isolating member between the shelf and the inside of the cage,
The above-mentioned shelf board and the above-mentioned saddle are fastened by fastening means, the fastening force of this fastening means can be adjusted, and the vibration of the shelf board at the time of keying can be increased or decreased. .

Images