JP2591404B2 - Keyboard instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard musical instrument, and by providing a mechanism for stopping the rotation of a hammer immediately before striking in a rotation range of a catcher which rotates together with the hammer.
Even if the striking sound is not generated, the touch of the key is not hindered.

[0002]

2. Description of the Related Art Conventionally, as a keyboard instrument for changing the volume of a sound produced by striking a string, Japanese Unexamined Utility Model Publication No. Sho 51-67732 has been proposed. In this keyboard instrument, a stopper having an elastic body is provided between a string and a hammer shank on a surface facing the hammer shank, and the rotating hammer shank is received by the stopper via the elastic body. By absorbing the kinetic energy due to the rotation of the hammer by the elastic body, this kinetic energy is weakened, and the sound volume due to striking is effectively reduced without disturbing the sound quality, the sound of the strings, and the like. .

However, the above-mentioned keyboard instruments are
It only discloses the configuration for weak sounds,
It was not considered to completely eliminate the pronunciation.

An object of the present invention is to provide a keyboard musical instrument in which a hammering sound is not emitted by providing a mechanism for stopping the rotation of the hammer immediately before striking.

[0005]

[Means for Solving the Problems ]
According to the first aspect of the present invention, the stretched string
And a hammer that rotates and strikes this string, and a hammer that
Bat connected to the center of rotation of the
A catcher provided on the bat so as to protrude therefrom
And a jack for rotating the bat by pushing it up.
Multiple mechanisms with a key for transmitting power to the jack
Keyboard instrument that can contact the catcher
Abutment position and non-abutment position that does not abut the catcher
And the contact position.
The bat is pushing up the jack
After being released from the
A stopper for preventing the hammer from striking the string;
Move the stopper between the contact position and the non-contact position.
Replacement means. Also, in claim 2
In the described invention, the stopper is provided for each key.
And the stopper and the catch for each key.
The position of contact with the roller can be adjusted.
And The invention according to claim 3 is the invention according to claim 1 or 2
The keyboard instrument according to claim 1, wherein the catch of the stopper is
Cushion is provided in the area where it comes into contact with the
It is characterized by. According to the fourth aspect of the invention,
The keyboard instrument according to any one of Items 1 to 3,
Detecting means for detecting the movement of the key or the hammer;
A sound source that generates a musical tone according to the detection result of the detection means;
It is characterized by having.

[0006]

According to the keyboard instrument of the present invention, the key
Power is transmitted to Jack and the bat is pushed up from below and turned
Move. At this time, the stopper abuts by the switching means
If it is moved to the position, the catcher provided on the bat
The abutment against the stopper, preventing the catcher from rotating.
You. Just before this, the bat is released from jacking up
Has been doing free rotation movement. Therefore, the cache
When the char contacts the stopper, the catcher and
The hammer integrated with it is pushed back. Sand
The hammer is returned just before striking. Meanwhile, switching
Means that the stopper has been moved to the non-contact position
Give a free rotation motion by pushing up the jack
The bat pivots with the hammer,
Hammer strikes strings. Further, according to the invention described in claim 2,
That is, for each key, the stopper and the catcher
Because the contact position is configured to be adjustable, the hammer
Adjust the distance from the string when the string is stopped and returned
be able to. In the invention according to claim 3,
Is located on the part of the stopper that comes into contact with the catcher.
A cushion is provided so that the catcher
There is no need to provide a session. That is, it rotates at high speed.
It is not necessary to provide a cushion on the member (catcher)
No. According to the fourth aspect of the present invention, detection of the detecting means is performed.
There is a sound source that generates musical sounds according to the result
If you stop hitting with a hammer,
Depending on the source, musical sounds can be generated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a keyboard instrument according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a pause state of strings and actions of an upright piano according to a first embodiment of a keyboard instrument of the present invention.

In FIG. 1, a string 1 corresponds to each pitch.
Numerals 1 are respectively stretched almost vertically. In the figure, one of them is taken out and shown. An action is provided for the string 11. This action mainly includes a hammer head 13 that rotates in a clockwise direction in the figure and hits the string 11, and a hammer shank 14 that is connected to the hammer head 13 and that is a barb or maple bar.
And The hammer head 13 is obtained by covering a hammer wood 13A with an egg-shaped hammer felt 13B.

The butt 15 is a hammer shank 1
4 is fixed to the base end. The bat 15 is supported by a center pin 17 so as to be swingable. A bat spring 16 is attached to the right end of the bat 15.
The butt spring 16 always biases the butt 15 in the counterclockwise direction in the figure. On the other hand, a catcher shank 18 protrudes from the left end of the bat 15 and is connected thereto. A wooden catcher 19 is fixed to the tip of the catcher shank 18. A catcher skin 19A is attached to the rear surface of the catcher 19 (the surface facing the back check 27).

A catcher stopper 102 is provided in the rotation range (broken line in the figure) of the catcher 19 which rotates together with the hammer head 13, the hammer shank 14, the butt 15, and the catcher shank 18. This catcher stopper 102 is the same as a well-known capstan screw for a grand piano.
The catcher stopper 102 has an L-shaped screw portion 102A which is screwed into a wooden stopper rail 103 from below in the figure and held. The catcher stopper 102 has a leather 102B adhered to a surface that can contact the upper surface 19B of the catcher 19.

The stopper rail 103 extends in common across the 88 keys provided corresponding to the strings 11. The switching means 106 switches the hammer rail 103 with an actuator such as a solenoid when the hammer rail 103 is in contact (right in the drawing) or non-contact (left in the drawing) by operating a switch or the like in a horizontal direction (in the drawing). Arrow). Catcher 19 by this switching means 106
At the time of contact between the stopper rail 102 and the catcher stopper 102, the stopper rail 103 moves in a direction approaching the hammer shank 14 and is fixed substantially horizontally. Also, when the switching means 106 does not contact the stopper rail 103,
Moves in a direction away from the hammer shank 14 and is fixed substantially horizontally. That is, the switching means 10
6, the catcher stopper 102 is located in the rotation range of the upper surface 19B of the catcher 19 in the rotation range.
03. On the other hand, the switching means 10
6, the catcher stopper 102 is located outside the rotation range of the catcher 19 when the hammer rail 103
Is held by

When the switching means 106 abuts, the adjustment tool 105 is inserted into the hole 102C of the catcher stopper 102.
, The catcher stopper 102 is rotated, and the length of the protrusion of the catcher stopper 102 from the stopper rail 103 can be finely adjusted. That is, the leather (felt or cloth is also acceptable) of the catcher stopper 102
02B and the upper surface 19B of the catcher 19 are set to 8
Fine adjustment can be made for each of the eight hammer approaches (for example, low range 3 mm, middle range 2.5 mm, high range 2 mm). Therefore, the approach of the hammer of the present embodiment can be adjusted as close as possible to the approach of each hammer of the upright piano of the normal performance, corresponding to each key. For this reason, the touch of the key is almost the same as that of an upright piano for normal performance.

Reference numeral 28 denotes a center rail extending in common across the 88 keys arranged corresponding to the strings 11. The bat 15 is rotatably mounted on the upper end of the center rail 28 via a butt flange 29 with the center pin 17 as a fulcrum. On the other hand, the wipen 26 is attached to the lower end of the center rail 28 via a wipen flange 30 so as to be rotatable about a pin 31. The pen 26 is provided so as to protrude horizontally from the center rail 28.

An L-shaped jack 33 is erected upright on a top surface of the pen 26 to the left of the center rail 28 via a jack flange 32. The tip (top end) of the large jack 33A of this jack 33 is
It is in contact with the lower end surface of the bat 15. Jack 33
Turns counterclockwise in the figure in response to a keystroke, and transmits clockwise turning power to the bat 15. A bat skin 15A is attached to the contact surface of the bat 15. At the left side of the jack flange 32, both ends of the jack spring 34 are respectively engaged with the lower surface of the small jack 33 </ b> B and the upper surface of the wipen 26. The jack spring 34 is connected to the jack 3 around the pin 36.
3 is urged clockwise in the figure. Also, 3
5 is a regulating button, which is a small jack 33B.
Is disposed at a position where the upper surface can contact. Leather or the like is also adhered to the contact surface 35A of the regulating button 35. A wippen heel 37 is fixed to the lower surface on the free end side of the wippen 26. Further, a capstan button (not shown) is in contact with the lower surface of the whip heel 37. The capstan button is provided upright on the upper surface of the rear end of a key (not shown). The key is swingably supported in the up-down direction.

The operation of the upright piano according to the above configuration will be described below by separately operating the switching means 106 when the catcher 19 and the catcher stopper 102 are in contact with each other and when the catcher stopper 102 is not in contact.

In the action in which the switching means 106 is switched to the abutment, the catcher stopper 102 is moved to the rotation range of the upper surface 19B of the catcher 19. When the key is pressed, the wipen 26 is rotated clockwise in the drawing with the pin 31 of the wipen flange 30 as a fulcrum. Therefore, the jack 33 is pushed up in accordance with the keying. At the same time, the damper spoon 46 rotates the damper lever 45 counterclockwise in the drawing against the damper spring 50. As a result, the damper 43
Is separated from the string 11.

On the other hand, when the jack 33 is lifted,
And pivot the bat 15 around the center pin 17 in the clockwise direction in the figure. For this reason, bat 15
Hammer head 13 and hammer shank 1
4. The catcher shank 18 and the catcher 19 rotate clockwise in the figure. However, when the jack 33 rises by a certain height, the small jack 33B comes into contact with the regulating button 35. As a result, the lift of the jack 33 is prevented, and the bat 15 escapes from the jack 33. However, after this, the hammer head 13, the hammer shank 14, the catcher shank 18, and the catcher 19 still continue to rotate clockwise in the drawing due to their inertia, and the hammer head 13 attempts to strike the string 11. I do.

However, immediately before the hammer head 13 hits the string 11, the upper surface 19B of the catcher 19 contacts the leather 102B of the catcher stopper 102. After this contact, the hammer head 13 is rebounded by the urging force of the butt spring 16 without hitting the string 11. At this time, the hammer head 13, the hammer shank 14, the butt 15, the catcher shank 18, and the catcher 19 rotate counterclockwise in FIG. Then, the catcher skin 19A comes into contact with the back check felt 27A. That is, at the time of contact of the switching means 106, the hammer head 13 does not strike a string and moves to a hammer stop state. Therefore, the string 11 does not sound when the switching means 106 is in contact (when the hammer is not struck).

In this non-hammer striking state, an electronic sound source based on a MIDI signal, such as a key sensor or a hammer sensor used for an automatic piano, may be sounded in response to a keystroke. This sound may be listened to using headphones or the like, or the sound volume of a speaker may be reduced for listening. Or
The sound may be emitted from the sound board using a sound board driver. That is, when the user does not want to output the piano sound even at night or during the daytime, the user can enjoy playing the piano without losing the key touch without sounding the strings.

The action in which the switching means 106 is switched to the non-contact state is that the catcher stopper 102 moves outside the rotation range of the upper surface 19B of the catcher 19. This action pushes up the jack 33 in response to a keystroke, and when the small jack 33B comes into contact with the regulating button 35 as in the case of the contact of the switching means 106, the bat 15 escapes from the jack 33 and the hammer head 13 and Due to its inertia, the hammer shank 14 keeps rotating in the clockwise direction in the figure to try to hit the string 11.

Since the rotation of the catcher 19 is not interrupted by the catcher stopper 102, the hammer head 13 strikes the string 11. Thereafter, the hammer head 13 is rebounded by the repulsive force of the string 11 and the urging force of the butt spring 16. As a result, the bat 15 rotates counterclockwise in the figure around the center pin 17. Then, the catcher skin 19A comes into contact with the back check felt 27A. That is, when the switching means 106 is not in contact, the hammer head 13 strikes the strings as usual and moves to the hammer stop state.

The switching means 106 connects the catcher 19 and the catcher stopper 102 in a contactable state.
State (hammer unstringed) or non-contact state (hammer)
You can switch to either
It is possible to switch between two states, mute and sound. Ma
In addition, since this embodiment does not process a main part of an action of a commercially available upright piano, for example, a hammer assembly, it can be implemented with only a slight improvement to an upright piano after market. it can. You
In other words, since the cushion is provided on the stopper,
The configuration of the piano does not need to be changed, and the silencing mechanism
It is also easy to retrofit
When installed on the catcher, balance is achieved by the mass of the cushion
Changes the design of the entire action mechanism
If necessary, and in this case retrofitting,
Must be attached to each of the catchers.
Sloppy). Further, in the present embodiment, the bat 15
Escapes from Jack 33, catcher 19
The upper surface 19B is the leather 102 of the catcher stopper 102.
Jack is pinched by the bat
And not. In addition, because I provided a cushion,
Accident caused by the catcher touching the stopper
The mechanism can be prevented from being damaged.

Next, a second embodiment of the keyboard instrument of the present invention will be described with reference to FIG. FIG. 2 is a side view showing a main part of the upright piano according to this embodiment.

In this embodiment, a cushion 19C is fixed to the upper surface 19B of the catcher 19 of the first embodiment. A screw 110 is provided through the stopper rail 103 instead of the catcher stopper 102 of the first embodiment. By rotating the screw 110, the cushion 19C of the catcher 19 is rotated.
The distance between the screw and the lower part of the screw 110 is finely adjusted according to the approach of each hammer. The other configuration is the same as that of the first embodiment.

In this embodiment, as compared with the first embodiment, fine adjustment can be performed in response to each approach of each hammer without using the adjustment tool 105. Other operations are the same as those of the first embodiment.

Next, a third embodiment of the keyboard instrument of the present invention shown in FIGS. 3 and 4 will be described. In this embodiment, a slide stopper 120 is provided in a rotation range (broken line in the figure) of the upper surface 19B of the catcher 19. The stopper 120 is provided on the upper surface 19 of the catcher 19.
A cushion 120 </ b> A is fixed to the surface facing B. This cushion 120A is a hammer shank 14
It is inclined toward. The stopper 120 is formed on the rail 121 by a round screw 122 so as to have the long hole 1.
It is fixed via 20B. This rail 121
It extends in common across the 88 keys arranged corresponding to the strings 11. FIG.
FIG. 2 is a plan view showing that a stopper 120 is held at 1. As shown in this figure, each stopper 120 is provided corresponding to each catcher 19.
By adjusting each round screw 122, each stopper 120
Can be moved left and right on this drawing.
At this time, the position of the cushion 120A of each stopper 120 moves up and down in FIG. That is,
The distance between the cushion 120A of each stopper 120 and the upper surface 19B of the catcher 19 can be finely adjusted according to the approach of each hammer. The other configuration is the second
This is the same as the embodiment.

This embodiment is different from the second embodiment in that
The cushion 19C need not be provided on the catcher 19, and the round screw 122 is fixed from the player side (the left side in the figure). Therefore, the distance between the cushion 120A of each stopper 120 and the upper surface 19B of the catcher 19 is determined. Adjustment, that is, adjustment of approach is easy. Other actions are
This is the same as the second embodiment.

[0028]

As described above, in the keyboard musical instrument according to the present invention, the mechanism for stopping the rotation of the hammer just before striking is provided in the rotation range of the catcher, so that the striking sound can be completely eliminated.
Can be stopped.

[Brief description of the drawings]

FIG. 1 is a side view showing a pause state of strings and actions of an upright piano according to a first embodiment of the present invention.

FIG. 2 is a side view showing a main part of an upright piano according to a second embodiment of the present invention.

FIG. 3 is a side view showing a pause state of strings and actions of an upright piano according to a third embodiment of the present invention.

FIG. 4 is a plan view showing a main part of FIG. 3;

[Explanation of symbols]

11 strings, 13 hammer head, 14 hammer shank, 15 bat, 18, 19 catcher, 33
Jack, 102 Catcher stopper, 106
Switching means

Claims (4)

(57) [Claims] 1. A stretched string, a hammer that pivots and strikes the string, a bat connected to the center of rotation of the hammer, and a bat that projects in the opposite direction of the string. Provided
A catcher that is, a jack for rotating push up the butt, and the key for transmitting a force to the jack, a plurality of sets comprising a keyboard musical instrument with a mechanism having, can abut the abutting position and the said catcher Cap
It is configured to be movable between non-contact positions that do not touch the
And if it is in the abutment position,
After the socket is released from the jack push-up
Hitting the string by the hammer in contact with the catcher
Moving the stopper between a contact position and a non-contact position;
Keyboard instrument, characterized in that it comprises a switching unit, the that. 2. The method according to claim 1, wherein the stopper is provided for each key.
In both cases, the stopper and the catcher are
The contact position can be adjusted.
A keyboard instrument according to claim 1. 3. The stopper according to claim 1, wherein the stopper is in contact with the catcher.
It is characterized in that a cushion is provided in the contacting part
3. The keyboard instrument according to claim 1, wherein 4. The keyboard music according to claim 1, wherein:
Detects further movement of key or hammer
Detecting means for A sound source that generates a musical tone according to the detection result of the detection means;
A keyboard instrument comprising: