JPH1165553A - Damper for upright piano - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and exactly adjust a damper pressure, without bending a damper wire by turning an adjusting screw loosely inserted from behind into the through-hole of a damper block, thereby regulating the damper pressure. SOLUTION: A through-hole 27 penetrating the damper block 15 in its longitudinal direction is formed at damper block and an adjusting screw 25 is inserted into the through-hole 27 from the behind. Internal screw threads 28 are formed at the damper block 15, and the adjusting screw 25 is screwed to these internal screw threads 28. A coil spring 26 has considerably large ridigity and is arranged between the damper block 15 and a damper head 16. The regulation of the damper pressure is executed by a method of treading a loud pedal to put all the dampers into a state of detaching the same from strings S all at once. When the adjusting screw 25 is turned in the stopped state of the damper head 16, the damper head 16 and damper felt 17 move in the longitudinal direction with respect to the damper block 15. Then, the spacing between the string S and the damper felt 17 is regulated to a prescribed value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper for an upright piano, which permits and stops sound generation due to vibration of a string by coming in contact with and separating from the string in conjunction with operation of a keyboard.

[0002]

2. Description of the Related Art FIG. 3 shows a general configuration of an action of an upright piano. Hereinafter, the description will be made with the back side as “front” and the near side as “back” when viewed from the keyboard side of the piano. This action 51
A rotatable wippen 3 mounted on each keyboard 2 via a capstan screw 6 on each keyboard 2, a jack 4 rotatably attached to the whippen 3, and a rotatable whippen 3. And a hammer 5.

[0003] The action 51 further includes a damper 52 except for those provided in the high frequency range. The damper 52 includes a damper lever 12 whose center is rotatably mounted, a damper wire 13 made of, for example, mild steel extending upward from the damper lever 12, and a damper block screw 53 connected to the damper wire 13.
And a damper head 1 bonded to the front surface of the damper block 54.
6 and a damper felt 17 adhered to the front surface of the damper head 16.

In the action having the above structure, when the keyboard 2 is depressed, the capstan screw 6
The whippen 3 rotates upward, the jack 4 rises,
By pushing up the bat 8 of the hammer 5 at its tip, the hammer 5 rotates forward (counterclockwise in FIG. 3),
When the hammer felt 10 strikes and vibrates the string S, a piano sound is generated.

On the other hand, as the keyboard 2 is depressed and the whippen 3 rotates, the damper spoon 22 attached thereto presses the damper lever 12 to rotate the damper 52 clockwise in FIG. I do. This allows
At a predetermined timing immediately before the hammer felt 10 strikes the string S, the damper felt 17 separates from the string S, allows sounding due to the vibration of the string S, and maintains this state while the keyboard 2 is pressed. By doing so, the pronunciation is continued. Thereafter, when the keyboard 2 is released, the damper lever 12 rotates counterclockwise due to the spring force of the damper lever spring 21, and the damper felt 17 comes into contact with the string S and presses it to generate sound. Is stopped (stop sound).

As described above, the damper 52 moves in and out of contact with the string S in conjunction with the depressing and releasing of the keys of each of the keyboards 2.
Since the allowance and stop of the sound of the piano are directly controlled, it is important to appropriately adjust the damper pressure, that is, the positional relationship between the string S and the damper felt 17 of the damper 52 in the front-rear direction for each damper 52. become.
If this adjustment is insufficient, the timing of sounding and stopping sound will be inappropriate or fluctuate, and it will not be possible to stop the sound by firmly stopping the vibration of the string S, which will hinder the performance and cause discomfort. It is because.

Conventionally, the damper pressure is adjusted by bending the damper wire 13 in the front-rear direction after the action 51 is assembled. In this case, a guide is a distance between the damper felt 17 and the string S when the damper 52 is simultaneously released from the string S by depressing a loud pedal (not shown), and a stop when the keyboard 2 is pressed and released. In the case of the former, the adjustment work is performed while grasping the distance by the amount of the eye, and in the case of the latter, the sound stopping state is distinguished by ear.

[0008]

However, in such a conventional method of adjusting the damper pressure, the distance between the damper felt 17 and the string S and whether or not the sound stopping state is proper are qualitatively determined by eyes and ears. It must be done while grasping the situation. Also,
Since the adjustment of the damper pressure is performed by the bending deformation of the damper wire 13, depending on the bending position and the degree of bending,
The position of the damper felt 17 in the front-rear direction is apt to change slightly, and the damper pressure tends to vary. Furthermore, when the mild steel damper wire 13 is deformed, not all of the deformation remains as permanent deformation, but part of the wire recovers over time.

For this reason, the conventional operation of adjusting the damper pressure largely depends on experience and intuition, and requires considerable skill. In addition, even when an expert makes adjustment, it is rare that an appropriate damper pressure can be obtained by one adjustment, and it is usual to repeat trial and error. As a result, this contributes to an increase in assembly cost. Furthermore, if the bending deformation of the damper wire 13 is repeatedly performed, the strength of the damper wire 13 decreases, which may adversely affect the function of the damper.

The present invention has been made to solve such a problem, and provides an upright piano damper that can easily and accurately adjust a damper pressure without bending a damper wire. It is intended to be.

[0011]

In order to achieve this object, the present invention provides a damper for an upright piano which permits and stops sound generation due to vibration of a string by moving in and out of the string in conjunction with operation of a keyboard. A damper lever rotatable in the front-rear direction in conjunction with operation of the keyboard, a damper wire having a lower end fixed to the damper lever and extending upward, and a through-hole penetrating in the front-rear direction; A damper block fixed to the upper end of the damper block, an adjusting screw loosely inserted into a through hole of the damper block from behind, a damper head screwed to a front end of the adjusting screw, and a front face of the damper head. , A damper felt that can be attached to and detached from the front string, and a spring disposed between the damper block and the damper head.

According to the damper of this upright piano, turning the adjusting screw causes the adjusting screw to move forward and backward with respect to the damper head, and the spring follows the movement. The directional position and thus the damper pressure can be adjusted. In this case, since the amount of movement of the damper head is proportional to the rotation operation angle of the adjusting screw, it is easy to quantitatively grasp the relationship between the two, fine adjustment is possible, and the stability is maintained over time. The adjustment of the damper pressure can be performed easily and accurately without skill. In addition, since the bending deformation of the damper wire is not involved, it is possible to prevent the damper wire from being adversely affected by a decrease in strength.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. In the following description, the same reference numerals are used for elements having the same configuration as the conventional damper described above. FIG. 2 shows the action of an upright piano having a damper to which the present invention is applied. Since the configuration and operation of this action 1 are basically the same as the conventional action 51 shown in FIG. 3, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted. .

A damper 11 according to the present invention has a damper lever 12 whose center is rotatably attached to the center rail 7 and a lower end fixed to the damper lever 12.
Damper wire 13 extending upward, for example, made of mild steel
And a damper block 15 fixed to the upper end of the damper wire 13, a damper head 16 disposed on the front side of the damper block 15, and a damper felt 17 adhered to the front surface of the damper head 16 and facing the string S. Have.

The structure and operation of the above damper 11 are as follows.
It is basically the same as the conventional damper 52 of FIG. That is, as the keyboard 2 is depressed, the damper spoon 22 attached to the wippen 3 presses the damper lever 12 and rotates the damper lever 12 clockwise in FIG. At a predetermined timing immediately before striking the string, the damper felt 17 separates from the string S, and allows sounding due to the vibration of the string S. By maintaining this state while the keyboard 2 is being pressed, sound generation is continued. Thereafter, when the keyboard 2 is released, the damper lever 12 rotates counterclockwise by the spring force of the damper lever spring 21, and the damper felt 1 is released.
7 is in contact with the string S, and the sound is stopped by pressing it.

As shown in FIG. 1, the damper 11 of this embodiment has a damper block 15 and a damper head 16.
Are connected via an adjustment screw 25 and a coil spring 26. Specifically, a through hole 27 is formed in the damper block 15 so as to penetrate in the front-rear direction. The adjusting screw 25 is loosely inserted into the through hole 27 from the rear.
The damper head 16 has a female screw 28 in the front-rear direction.
Is formed, and the adjusting screw 25 is screwed into the female screw 28. The coil spring 26 has a considerably high rigidity, and is disposed between the damper block 15 and the damper head 16 while being passed through the adjusting screw 25.

Next, a method of adjusting the damper pressure in the damper 11 having the above configuration will be described with reference to FIGS. First, a damper 11 is simultaneously separated from the string S by depressing a loud pedal (not shown) as shown in FIG. Next, the damper head 1
6 is stopped by a stopper (not shown) or the like,
When the adjusting screw 25 is turned with a tool such as a screwdriver, the adjusting screw 25 moves forward and backward with respect to the damper head 16, and the coil spring 26 follows the movement, whereby the damper head 16 and the damper felt 17 are moved.
Moves in the front-rear direction with respect to the damper block 15. Therefore, in the state of FIG. 1, the damper pressure can be adjusted to a predetermined value by turning the adjusting screw 25 so that the distance between the string S and the damper felt 17 becomes a predetermined value.

In this case, since the amount of movement of the damper head 16 is proportional to the rotation angle of the adjusting screw 25, the relationship between the two can be easily grasped quantitatively, fine adjustment is possible, and even over time. Since it is stable, the adjustment of the damper pressure can be performed easily and accurately without skill. Further, unlike the related art, since it is not necessary to bend and deform the damper wire 13, there is no adverse effect on the damper 11 due to a decrease in the strength of the damper wire 13 due to the bending deformation. As described above, since the coil spring 26 has a considerably large rigidity, the sound damping performance of the damper 11 is hardly affected.

The embodiment described above is merely an example, and the detailed configuration and the like can be changed without departing from the spirit of the present invention.

[0020]

As described above, the damper of the upright piano of the present invention has an effect that the damper pressure can be easily and accurately adjusted without bending the damper wire.

[Brief description of the drawings]

FIG. 1 is a partially broken side view of a damper of an upright piano according to an embodiment of the present invention.

FIG. 2 is a side view of an action including the damper of FIG. 1;

FIG. 3 is a side view of an action including a conventional damper.

[Explanation of symbols]

 2 Keyboard 11 Damper 12 Damper Lever 13 Damper Wire 15 Damper Block 16 Damper Head 17 Damper Felt 25 Adjusting Screw 26 Coil Spring 27 Through Hole 28 Female Screw S String

Claims (1)

[Claims] 1. A damper for an upright piano which permits and stops sound generation due to vibration of a string by moving in and out of contact with a string in conjunction with operation of a keyboard, wherein the damper rotates in the front-rear direction in conjunction with operation of the keyboard. A movable damper lever, a damper wire having a lower end fixed to the damper lever and extending upward, and a damper block having a through hole penetrating in the front-rear direction and fixed to an upper end of the damper wire. An adjusting screw loosely inserted into the through hole of the damper block from the rear; a damper head screwed to a front end of the adjusting screw; fixed to a front surface of the damper head, capable of being separated from and connected to the front string; An upright pier comprising: a damper felt; and a spring disposed between the damper block and the damper head. Damper.