JP2001242852A - Keyboard device for keyboard instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a keyboard device of a keyboard instrument which is capable of abolishing weights consisting of lead to be attached to a keyboard, is accordingly capable of making the weight reduction of the keyboard and a piano and the adaptation to environmental problems and allows the easy adjustment of touch weights even in a place exclusive of a factory with good accuracy. SOLUTION: This keyboard device has the keyboard 3 which extends in the longitudinal direction and is freely oscillatably supported at a balance pin 7 in a central part, an action 4 which has a wippen flange 14 and a wippen 10 freely turnably supported at this wippen flange and is placed in a position on the rear side of the balance pin 7 of the keyboard 3, a spring 18 which is fixed to the wippen flange 14, engages the wippen 10 and biases the wippen 10 in a direction where the wippen 10 is lifted around the wippen flange 14 and an adjusting screw 19 which is freely advanceably and retreatably screwed to the wippen 10, abuts at its front end on the spring 18 and adjusts the biasing force of the spring 18 according to the advance and retreat positions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device for a keyboard instrument such as a grand piano having an action, and more particularly to a keyboard device having a function of adjusting a touch weight.

[0002]

2. Description of the Related Art FIG. 9 shows a keyboard device of a conventional grand piano. The keyboard device 51 includes a reed 52 and a reed 5
A plurality of keys 53 (only one white key and one black key are shown) and an action 54 arranged on the keyboard 2 are provided. Each keyboard 53 extends in the front-rear direction, and is pivotally supported at its center by a balance pin 55 erected on the reed 52. On the upper surface of the keyboard 53, a capstan 56 is provided at a position behind the balance pin 55.
Is provided. The action 54 is provided for each keyboard 53, and has a wippen 58 whose rear end is rotatably attached to a wippen flange 57, a rotatable hammer 59, and the like. It is placed on the keyboard 53 via a stun 56.

With the above configuration, when the keyboard 53 is depressed, the keyboard 53 swings around the balance pin 55, and the whippen 58 is pushed up through the capstan 56, thereby causing the action 54 to move. Works,
When the hammer 59 rotates upward and strikes a string (not shown), a piano sound is generated. The touch weight (static load) of the keyboard 53 is determined by the balance pin 55 based on the weight of the keyboard 53 and the weight of the action 54 placed thereon.
It is determined by the balance of the surrounding moment.

In this keyboard device 51, a plurality of weights 60 are provided on the keyboard 53 in order to adjust the touch weight. The weight 60 adds weight to the keyboard 53 so as to oppose the weight of the action 54 and obtain a desired touch weight, and is made of a lead of a predetermined size formed in a columnar shape. Specifically, the weight 60 is inserted into a plurality of buried holes 61 formed at a position in front of the balance pins 55 of the keyboard 53, and then caulked to make the keyboard 5
3 is attached. Lead is used as the weight 60 because of its high specific gravity among metals,
It is inexpensive, rich in flexibility and ductility, and easily processed as described above.

[0005]

However, in the above-mentioned conventional keyboard device 51, in order to obtain a desired touch weight, a large number of weights 60 made of lead must be attached so as to oppose the weight of the action 54. Not increase the weight of the keyboard 53,
As a result, the weight of the piano is increased, and when the reed 52 is shifted to obtain the soft pedal effect, the pedal operation force becomes heavy, and the return of the keyboard 53 becomes slow. Also, by attaching the weight 60 to the front part of the keyboard 53, the touch weight of the keyboard 53 is reduced, but on the contrary, it is difficult for the keyboard 53 to return upward after a key is pressed, and it is not possible to smoothly hit a trill or the like. There are also performance disadvantages. Further, since lead used as the weight 60 is a harmful substance, it is desirable to use as little as possible in environmental measures.

[0006] Even if the touch weight is optimally adjusted at the time of shipment from the factory, it often deviates from the optimal value due to the installation conditions of the piano, the use environment, and the like. is there. However, in that case, in the configuration of the conventional keyboard device 51, the side surface of the weight 60 is cut, or a buried hole 61 is newly formed in the keyboard 53, so that the weight
However, readjustment of the touch weight is extremely troublesome, and readjustment at a place other than the factory is actually difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and can eliminate the lead weight attached to the keyboard, thereby reducing the weight of the keyboard and piano and adapting to environmental problems. It is an object of the present invention to provide a keyboard device for a keyboard instrument that can accurately adjust the touch weight and can easily adjust the touch weight even in a place other than a factory.

[0008]

To achieve this object, a keyboard device for a keyboard instrument according to the present invention extends in the front-rear direction,
A central portion pivotally supported by a balance pin, a wippen flange and a whippen rotatably supported by the wedge, and a position behind the balance pin of the keyboard via the whippen And a spring that is fixed to the wippen flange, is engaged with the whippen, and urges the whippen in a direction to lift the whippen around the whippen flange, and is screwed into and out of the whippen so that it can move forward and backward. And an adjusting screw for adjusting the urging force of the spring in accordance with the advance / retreat position.

According to the keyboard device of the keyboard instrument, the action has a wippen rotatably supported by the wippen flange as usual, and the action is provided behind the balance pin of the keyboard via the whippen. It is placed. In addition, a spring fixed to the wippen flange urges the wippen in a direction of lifting the wippen around the wippen flange, so that a moment about the whippen flange in that direction always acts on the wippen. As a result, the weight of the action acting on the keyboard via the whippen is reduced by the amount of the moment, and the operating force of the keyboard is correspondingly reduced. Therefore, by appropriately setting the spring force of this spring, the conventional weight made of lead attached to the keyboard so as to oppose the weight of the action can be abolished in order to obtain the desired touch weight. Thus, it is possible to reduce the weight of the keyboard and piano and to adapt to environmental problems.

In addition, by turning the adjusting screw screwed into the wippen to adjust the advance / retreat position, the urging force of the spring and the moment around the whippen flange can be adjusted steplessly, so that it acts on the keyboard. The weight of the action, and therefore the touch weight, can be easily and accurately adjusted.

In this case, the whippen is formed with a screw hole into which the adjusting screw is screwed, and a spring accommodating portion continuous with the screw hole. At least a part of the spring is accommodated in the spring accommodating portion, and one end is formed. Preferably, the part is fixed to the wippen flange, and the adjusting screw is in contact with the other end.

According to this structure, the spring accommodating portion and the screw hole are formed in the wippen, and the spring and the adjusting screw are respectively accommodated and screwed into the spring accommodating portion. Can be. Also, since at least a part of the spring is housed in the spring housing,
It can be made compact.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG.
1 shows a keyboard device of a grand piano to which the present invention is applied. As shown in FIG. 1, a keyboard device 1 includes a reed 2 horizontally placed on a shelf (not shown), and a number of keyboards 3 (one white key 3a and one black key 3b each arranged on the reed 2). And an action 4 and the like.

Each keyboard 3 has a keyboard body 3c extending in the front-rear direction and made of a wooden material, and a keyboard cover 3d made of a plastic molded product adhered to the upper surface of the keyboard body 3c. A middle seat plate 5 is adhered to the center of the upper surface of the keyboard body 3c, and a balance pin hole 6 is formed so as to penetrate them vertically. The keyboard 3 is swingably supported by the balance pin 7 by engaging the balance pin hole 6 with the balance pin 7 provided on the reed 2. A capstan 9 is attached to the upper surface of the keyboard 3 at a position behind the balance pin hole 6 via a capstan seat plate 8 (see FIG. 2). A conventional weight made of lead is not attached to the keyboard body 3c.

The action 4 is provided for each keyboard 3, and as shown in FIG. 2, a wippen 10 extending in the front-rear direction, a jack 11 rotatably mounted on the wippen 10, and extending upward, and a jack 11 And a spring 18 and an adjusting screw 19 attached to the rear end of the wippen 10. A string (not shown) is stretched above the hammer 12 so as to extend in the front-rear direction.

The wippen 10 is made of, for example, a plastic molded product, and has a whippen flange 14 near its rear end.
The spring mounting portion 10a is rotatably supported at the front end, extends largely forward, and slightly protrudes rearward of the wippen flange 14. A wippen heel 17 is integrally provided below the wippen 10, and the wippen heel 17 is placed on the capstan 9 of the keyboard 3.

The wippen flange 14 is screwed to a wippen rail 16 extending between left and right brackets 15, 15 (only one is shown). As shown in FIG. 3, two rows of left and right cord mounting grooves 14 a, 14 a are formed on the lower surface of the whippen flange 14. By inserting and adhering the parts, the cord 20 is attached in a ring shape so as to extend rearward of the wippen flange 14.

As shown in FIGS. 3 and 4, a spring receiving recess 21 (spring receiving portion) for receiving the spring 18 is formed in the center of the rear surface of the spring mounting portion 10a of the wippen 10, and the upper surface thereof has A screw hole 22 into which the adjusting screw 19 is screwed is formed so as to be continuous with the spring accommodating recess 21. Further, a pin 23 is horizontally mounted on the spring mounting portion 10a so as to cross the spring accommodating recess 21.

The spring 18 is formed by winding a wire made of steel or the like into a predetermined shape.
a, a curved portion 18b that largely curves downward from one end of the coil portion 18a and extends downward, and a screw contact portion 18c that slightly extends from the other end of the coil portion 18a. Spring 18
The coil portion 18a of the whippen 10 is
The bending portion 18b is accommodated in the pin 1 and is passed through and attached to the pin 23. The bending portion 18b is engaged with the cord 20 at the curl portion at the lower end in a state where the bending portion 18b is bent toward the wippen flange 14 side. Has been stopped. Therefore, the bending portion 1
8b is applied to the wippen 1 via the pin 23.
It always acts downward on the 0 spring mounting portion 10a, that is, it always urges the whippen 10 in the direction of lifting the whippen 10 around the whippen flange 14 (the direction of arrow A in FIG. 4).

The adjusting screw 19 is screwed into the screw hole 22 of the spring mounting portion 10a of the wippen 10 so as to be able to advance and retreat from above. The tip of the adjusting screw 19 projects into the spring accommodating recess 21, and the spring contact portion of the spring 18 is formed. 18c from above. Therefore, the tension of the curved portion 18b of the spring 18, that is, the urging force of the spring 18 acting on the wippen 10 can be adjusted steplessly by turning the adjusting screw 19 to adjust the advance / retreat position.

With the above configuration, when the keyboard 3 is depressed, the keyboard 3 swings around the balance pin 7 and the action 4 operates accordingly. That is, when the whippen 10 is pushed up through the capstan 9, the whippen 10 is turned upward around the whippen flange 14, and accordingly, the jack 11 pushes up the hammer 12 and is turned upward. By hitting a string located above, a piano sound is generated.

The touch weight of the keyboard 3 is determined by the balance of the moment around the balance pin 7 due to the weight of the keyboard 3 and the weight of the action 4 placed on the keyboard 3 via the whippen 10. As described above, in the keyboard device 1, a moment about the whippen flange 14 in the direction of lifting the wippen 10 always acts on the wippen 10 by the urging force of the spring 18. As a result, the weight of the action 4 acting on the keyboard 3 via the whippen 10 is reduced by the amount of the moment, and the operating force of the keyboard 3 is correspondingly reduced. Therefore, this spring 18
By appropriately setting the spring force, the conventional weight of lead attached to the keyboard 3 to oppose the weight of the action 4 can be eliminated in order to obtain a desired touch weight, and thereby, The weight of the keyboard 3 and the piano can be reduced and adaptation to environmental problems can be achieved. In particular, by reducing the weight of the keyboard 3, performance advantages such as smooth operation of a soft pedal and continuous hitting of a trill or the like can be obtained.

Further, by adjusting the advancing / retracting position of the adjusting screw 19, the spring force of the spring 18 and the resulting moment about the whippen range 14 can be adjusted steplessly, so that the weight of the action 4 acting on the keyboard 3 can be reduced. Therefore, the touch weight can be adjusted with high accuracy. Furthermore, just turning the adjusting screw 19 from outside with a screwdriver,
Since the touch weight can be adjusted, the touch weight can be easily adjusted even in a place other than the factory. Further, the present embodiment has a configuration in which the spring accommodating recess 21 and the screw hole 22 are formed in the wippen 10, and the spring 18 and the adjusting screw 19 are respectively accommodated and screwed into the spring accommodating recess 21. can do. Further, since the spring 18 is accommodated in the spring accommodating concave portion 21, it is possible to make the structure compact.

FIGS. 5 and 6 show a second embodiment of the present invention. In this embodiment, the present invention is applied to an upright piano, and both figures show a part of the action. This action 21 is different from the above-described action 4 of the grand piano in the shape and arrangement, but has the same basic configuration. Shall be explained. The action 21 is rotatably supported by the wippen flange 14 and extends rearward.
0 and a jack 11 that is rotatably attached to the wippen 10 and extends upward to push up an upper hammer (not shown).

The wippen 10 is a wippen heel 17
Through a capstan screw (both not shown) provided on the keyboard. Further, the whippen 10 is integrally provided with the spring mounting portion 10a so as to protrude upward near the rear side of the whippen flange 14. As shown in FIG. 6, a spring receiving hole 24 (spring receiving portion) is formed in the spring mounting portion 10 a so as to penetrate in the front-rear direction, and the pin 23 is horizontally traversed through the spring receiving hole 24. Attached to.

The spring 18 is formed of a torsion coil spring.
The whippen flange 14 has a notch 14b. The adjusting screw 19 is attached to the spring mounting portion 10.
The screw 18 is screwed into the screw hole 22 formed in the upper wall so as to be able to advance and retreat from above. The tip of the screw protrudes into the spring accommodating hole 24 and contacts the other end of the spring 18 from above.

With the above configuration, according to the present embodiment,
The spring force of the spring 18 always moves in the direction of lifting the wippen 10 (the direction of the arrow B in FIG. 6) via the adjusting screw 19.
By acting and adjusting the advance / retreat position of the adjusting screw 19, the urging force of the spring 18 can be adjusted. Therefore, the effect of the first embodiment applied to the grand piano can be obtained in the same manner for the upright piano. In other words, by eliminating the conventional weight made of lead, it is possible to reduce the weight of the keyboard 3 and the piano and adapt to environmental issues, and it is possible to easily and accurately adjust the touch weight simply by turning the adjusting screw 19. And the like.

The notch 14 of the wippen flange 14
b is usually formed on the wippen 14 for mounting through the whippen 10, so this embodiment is similar to the first embodiment without any changes to the existing wippen flange 14. Inexpensive and compact configuration.

The present invention can be implemented in various modes without being limited to the above-described embodiments.
For example, the spring 18 and the adjusting screw 19 shown in the embodiment are used.
The configuration, arrangement, and the like are merely examples, and may be changed as appropriate as long as the whippen 10 is constantly biased upward by the spring 18 and the biasing force can be adjusted by the adjusting screw 19. Is possible.

FIGS. 7 and 8 show such a modification.
This shows a grand piano and an upright piano, respectively. That is, these modifications are
The spring 18 is formed of a leaf spring, and one end of the spring 18 is screwed to the wippen flange 14 with a screw 26, and the other end is housed in a spring housing 25 formed on the wippen 10 and screwed into the wippen 10. This is in contact with the adjusting screw 19. According to this configuration, the urging force of the spring 18 always acts in the direction in which the wippen 10 is lifted (the directions of arrows C and D, respectively) via the adjusting screw 19, and the urging force can be adjusted by the adjusting spring 19. Therefore, the same effects as those of the first and second embodiments can be obtained. Further, since the spring 18 is formed of a simple leaf spring and the spring 18 is simply screwed, and the pins 23 as in the first and second embodiments are not required, the structure can be reduced. Can be.

Although the embodiment is an example in which the present invention is applied to an acoustic grand piano or an upright piano, the present invention applies to all keyboard instruments with an action having a whippen such as a grand type electronic piano. Can be applied to In addition, the configuration of the details can be appropriately changed within the scope of the present invention.

[0032]

As described above, the keyboard device of the keyboard instrument according to the present invention can eliminate the weight of lead attached to the keyboard, thereby reducing the weight of the keyboard and piano and adapting to environmental problems. And the touch weight can be adjusted accurately and easily at a place other than the factory.

[Brief description of the drawings]

FIG. 1 is a side view showing a keyboard device of a grand piano according to a first embodiment of the present invention.

FIG. 2 is a side view showing an action of the keyboard device of FIG. 1;

FIG. 3 is a perspective view showing a spring and an adjusting screw attached to the action of FIG. 2;

FIG. 4 is a sectional view corresponding to FIG.

FIG. 5 is a perspective view showing a part of an action of an upright piano according to a second embodiment.

FIG. 6 is a sectional view corresponding to FIG.

FIG. 7 is a sectional view showing a modified example of a grand piano.

FIG. 8 is a sectional view showing a modification of the upright piano.

FIG. 9 is a side view showing a keyboard device of a conventional grand piano.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 keyboard device 3 keyboard 4 action 7 balance pin 10 wippen 14 wippen range 18 spring 19 adjustment screw 21 spring accommodation concave part (spring accommodation part) 22 screw hole 24 spring accommodation hole (spring accommodation part) 25 spring accommodation part

Claims (2)

[Claims] 1. A keyboard extending in the front-rear direction and swingably supported at a center portion by a balance pin, a wippen flange and a whippen rotatably supported by the whippen frange. An action placed at a position behind the balance pin on the keyboard, and fixed to the whippen flange;
A spring that engages with the wippen and urges the whippen in a direction to lift the whippen around the whippen flange, and is screwed with the whippen so as to be able to advance and retreat, and the tip abuts the spring, and the tip is in contact with the spring and the advancing and retreating position. A keyboard device for a keyboard instrument, comprising: an adjusting screw for adjusting a biasing force of a spring; 2. The whippen is formed with a screw hole into which the adjusting screw is screwed, and a spring accommodating portion continuous with the screw hole, and at least a part of the spring is accommodated in the spring accommodating portion. 2. The keyboard device for a keyboard instrument according to claim 1, wherein one end is fixed to the whippen flange, and the adjustment screw is in contact with the other end. 3.