JP2003076360A - Keyboard instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a keyboard instrument which does not hinder the touch of keys even if the generation of striking tones is obviated by providing an outer side of a rotational moving range of a hammer head with a mechanism of stopping the rotational movement of a hammer just before striking. SOLUTION: The keyboard instrument is provided with a hammer head 13 which is stretched to be installed with a string 11 in a vertical direction and strikes this string 11 by moving rotationally and a hammer shank 14 installed consecutively therewith and is provided with a jack 33 for rotationally moving these by jerking up the same from below and a key for transmitting force to the jack 33. The instrument is provided with a projecting part 101 of the hammer shank 14 so as to project to the outer side of the rotational moving range of the hammer head 13. The instrument is provided with a hammer stopper 102 which touches this projecting part 101 just before the hammer head 13 strikes the string 11. The instrument is provided with switching means 106 for switching the touching or non-touching of the hammer stopper 102 and the projecting part 101.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard instrument, in which the hammer is stopped immediately before striking the string, and a mechanism for rebounding immediately is provided outside the swing range of the hammer head to prevent the striking sound. However, the touch of the key is not hindered.

[0002]

2. Description of the Related Art Heretofore, as a keyboard instrument in which pronunciation by striking a string has been changed, the one described in Japanese Utility Model Publication No. 51-67732 has been proposed. In this keyboard instrument, a stopper having an elastic body is provided on the surface facing the hammer shank between the string and the hammer shank, and the rotating hammer shank is received by the stopper via the elastic body. The elastic body absorbs the kinetic energy generated by the rotation of the hammer to weaken the kinetic energy and effectively reduce the sound volume caused by striking the strings without impairing the sound quality or the sound of the strings. .

[0003]

However, in such a keyboard instrument, there is a problem in that the touch of the key must be sacrificed to some extent when the pronunciation by the string striking is not completely generated. It was That is, in order to prevent the string striking sound from being generated, it is necessary to bring the stopper closer to the hammer shank side. At this time,
In normal approach (distance between the string and the hammerhead when the hammer assembly bat no longer receives a thrust force from the jack and starts free rotation motion) before the hammer assembly bat escapes from the jack. In addition, the hammer assembly is pinched by the jack and the stopper and stops, making it difficult to hit repeatedly.
You will not be able to play like a conventional piano. To prevent this, the approach must be wider than usual. In other words, the time when the bat leaves the jack is adjusted early. In this way, the touch of the key is changed, the stopper is moved to a position where it does not contact the hammer shank, and when the sound is generated by striking a string, the escape energy prematurely decreases the energy supplied by the jack, Since the impact force of the hammer is weakened, the tone produced by striking the strings becomes a little softer. In addition, the repeated hitting property of the keyboard was somewhat deteriorated.

Therefore, an object of the present invention is to provide a mechanism for stopping the rotation of the hammer immediately before striking the string outside the swing range of the hammer head so that the key touch can be performed even if the striking sound is not generated. It is to provide a keyboard instrument that is not disturbed.

[0005]

According to a first aspect of the present invention, there is provided a keyboard instrument having an upright piano string and an action, wherein the action has at least one end provided on a hammer shank, A hammer for moving and striking the string, and a jack for pushing up and rotating the hammer, a key for transmitting a force to the jack, and a hammer shank of the hammer immediately before the hammer strikes the string. A stopper provided so as to be capable of abutting, and a switching means for moving the stopper to a contact position with the hammer shank or a non-contact position in accordance with an operation, and the string at the non-contact position. The hammer produces a sound by striking a string, and at the contact position, the hammer does not contact the string and the electronic sound source is not hit. Make it possible to et al pronunciation,
The switching means is a keyboard instrument that is a pedal.

According to a second aspect of the present invention, there is provided a keyboard instrument having an upright piano string and an action, wherein the action has at least one end provided on a hammer shank and pivots to strike the string. Equipped with a hammer and a jack that pushes up and rotates this hammer,
A key for transmitting force to the jack, a stopper provided so as to be able to contact the hammer shank of the hammer immediately before the hammer strikes the string, and a contact position or non-contact with the hammer shank. A switching means for moving the stopper in accordance with an operation at a position, and when the hammer hits the string at the non-contact position, a sound is generated by striking the string, and at the contact position, the hammer is operated by the hammer. It is a keyboard instrument capable of being sounded from an electronic sound source without hitting a string without hitting a string and finely adjusting the stopper for each key when the stopper is not in contact by the switching means.

[0007]

In the keyboard instrument according to the present invention, even when the hammer shank contacts the stopper, and when the hammer shank does not contact the stopper, a force corresponding to the keystroke is generated as in normal playing. Be transmitted to. This allows
Jack pushes the hammer up from below to rotate it. The approach of the hammer when not in contact is normal. Then the hammer hits the strings. However, at the time of contact when the stopper is moved to the contact position by the switching means, the stopper is provided between the string and the hammer shank. Therefore, the hammer shank contacts the stopper immediately before the hammer hits the string. After this contact, the hammer is repelled without striking the strings. Therefore, at the time of contact by the switching means,
The hammer does not hit the strings. In this case, it is not necessary to significantly widen the approach in advance in consideration of an error. Therefore, the approach of the hammer at the time of this contact is normal.
Therefore, the jack escapes as in the normal performance. On the other hand, when the contact is not made by the switching means, the stopper moves to the outside of the rotation range of the hammer shank. The hammer is not blocked by the stopper after being pushed up by the jack. Therefore, at the time of non-contact, the string can be struck as a normal performance. Then, this switching can be performed by pedal operation. Further, when the above-mentioned non-contact,
The stopper can be finely adjusted for each key.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 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 rest state of strings and actions of an upright piano according to a first embodiment of a keyboard instrument of the present invention.

In this figure, the string 1 is associated with each pitch.
1 are stretched almost vertically. In the figure, one of them is taken out and shown. An action is arranged for this string 11. This action is mainly performed by a hammer head 13 that pivots clockwise in the figure to strike the string 11, and a hammer shank 14 that is connected to the hammer head 13 and that is made of a side material or a maple material.
And are equipped with. The hammer head 13 is a hammer wood 13A covered with an egg-shaped hammer felt 13B. The hammer wood 13A has a hole 100 formed at a portion continuously provided with the hammer shank 14. The hammer shank 14 is fitted in the hole 100. Further, the tip of the hammer shank 14 projects a predetermined length outside the rotation range (broken line in the figure) of the hammer felt 13B. That is, this hammer shank 14 is longer than a normal hammer shank.

Then, the protruding portion 1 of the hammer shank 14
A hammer stopper 102 is provided between the projecting portion 101 of the hammer shank 14 and the string 11 inside the turning range of 01 (broken line in the figure) and outside the turning range of the hammer felt 13B. The hammer stopper 102 is similar to a well-known regulating button. The screw portion 102A of the hammer stopper 102 is screwed into and held by the stopper rail 103. The hammer stopper 102 has a cushioning material 102B such as leather or felt adhered to the surface of the hammer stopper 102 facing the protruding portion 101 of the hammer shank 14.

The stopper rail 103 is commonly extended across all 88 keys arranged corresponding to the strings 11. In addition, the switching means 106 switches the hammer rail 103 between two directions when contacting or not contacting by operating a lever or a pedal. When the switching means 106 comes into contact, the stopper rail 103 is
The pin 104 is rotated in the clockwise direction in the figure (direction approaching the hammer felt 13B) and is fixed substantially vertically. Further, when the switching means 106 is not in contact, the stopper rail 103 rotates about the pin 104 in the counterclockwise direction in the figure (the direction away from the hammer felt 13B) and is fixed substantially horizontally. That is, when the switching means 106 is in contact, the hammer stopper 102 is held by the hammer rail 103 in the rotation range of the protruding portion 101 of the hammer shank 14 (between the broken lines in the figure). On the other hand, when the switching means 106 is not in contact, the hammer stopper 102 is provided outside the rotation range of the protruding portion 101 of the hammer shank 14 and the hammer rail 103.
Is held by.

When the switching means 106 is not in contact, the screw portion 102A of the hammer stopper 102 is rotated by using the adjusting tool 105 so that the length of the hammer stopper 102 protruding from the stopper rail 103 is independently set for each key. Can be fine-tuned. That is, when the switching means 106 is brought into contact, the distance between the leather or the like 102B of the hammer stopper 102 and the protruding portion 101 of the hammer shank 14 is set to 88 hammer approaches (for example, a bass range of 3 mm, a middle range of 2.5).
mm, treble range 2 mm). Therefore, the hammer approach of the present embodiment can be adjusted as close as possible to the hammer approach of the normal upright piano, corresponding to each key. Therefore, the touch of the key is almost the same as the upright piano that is normally played.

The bat 15 is the hammer shank 1
It is fixed to the base end of No. 4. A center pin 17 supports the butt 15 so that it can swing. A butt spring 16 is attached to the right end of the bat 15.
The butt spring 16 constantly urges the bat 15 in the counterclockwise direction in the drawing. On the other hand, a catcher shank 18 projects and is connected to the left end of the bat 15. A catcher 19 is fixed to the tip of the catcher shank 18.

Numeral 28 is a center rail which extends in common across all 88 keys arranged corresponding to the strings 11. The butt 15 is rotatably attached to 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, a whip pen (not shown) is rotatably attached to the lower end of the center rail 28. The whip pen is provided so as to horizontally project from the center rail 28.

On the left side of the center rail 28 on the upper surface of the whip pen, an L-shaped jack 33 is erected so as to be swingable. The tip (top) of this jack 33 is
It contacts the lower end surface of the bat 15. Jack 33
Is a mechanism for transmitting a turning force in a clockwise direction in the drawing corresponding to a key stroke of a key (not shown) to the bat 15 and forcing the hammer head 13 and the hammer shank 14 to push up and rotate from the bottom via the bat 15. is there.

The operation of the upright piano having the above-described structure will be described below separately when the switching means 106 is in contact and when it is not in contact.

In the action of switching the switching means 106 to contact, the hammer stopper 102 causes the hammer shank 1 to move.
4 has moved between the rotation range of the protrusion 101 and the rotation range of the hammer head 13. In this action, when a key is tapped, the jack 33 is pushed up in response to the tap. At the same time, the damper 43 is separated from the string 11.

On the other hand, when the jack 33 is raised, the bat 15
Is pushed up, and the bat 15 is rotated about the center pin 17 in the clockwise direction in the figure. Therefore, the bat 15
The hammer head 13 and the hammer shank 14 provided at the position rotate clockwise in the figure. However, when the jack 33 moves up by a certain height, the jack tail (not shown) contacts the regulating button (not shown). As a result, the jack 33 is prevented from rising, and the bat 15 escapes from the jack 33. However, even after this, the hammer head 13 and the hammer shank 14 continue to rotate in the clockwise direction in the drawing due to their inertia, and try to strike the string 11.

However, immediately before the hammer head 13 strikes the string 11, the protrusion 101 of the hammer shank 14 causes the shock absorbing material 10 such as leather felt of the hammer stopper 102 to be formed.
Contact 2B. After this contact, the hammer head 13 is repelled by the urging force of the butt spring 16 without hitting the string 11. As a result, the bat 15 rotates about the center pin 17 in the counterclockwise direction in the drawing. Then, the catcher skin 19A contacts the back check felt 27A. That is, when the switching means 106 comes into contact, the hammer head 13 does not strike the strings but moves to the hammer stop state. Therefore, when the switching means 106 is in contact (when the hammer is not striking strings), the string 1
Never pronounce from 1.

In this hammer-free string striking state, an electronic sound source based on performance information such as a key sensor used in an automatic piano or a hammer sensor may be used in response to a keystroke. You may listen to this pronunciation with headphones or reduce the volume of the speaker. Alternatively, a soundboard driver may be used to sound the soundboard at a low volume. That is, even at night or during the day, if you do not want to make a piano sound, you can enjoy playing the piano without damaging the touch without sounding the strings.

The action in which the switching means 106 is switched to non-contact is that the hammer stopper 102 is moving outside the range of rotation of the protruding portion 101 of the hammer shank 14. In this action, when the jack 33 is pushed up in response to a keystroke, the jack 33 pivots the bat 15, and the bat 15 escapes from the jack 33, and the hammerhead continues after that, just as when the switching means 106 abuts. Due to its inertia, 13 and the hammer shank 14 continue to rotate in the clockwise direction in the figure, and try to strike the string 11.

Since the hammer head 13 is not blocked by the hammer stopper 102 in its rotational movement, the string 11
Hit as you normally would. After this string striking, as usual,
The hammer head 13 is repelled by the repulsive force of the string 11 and the urging force of the butt spring 16. As a result, the bat 15 rotates about the center pin 17 in the counterclockwise direction in the drawing. And catcher skin 19
A contacts the back check felt 27A. That is, when the switching means 106 is not in contact, the hammer head 13 strikes the string as in a normal performance and moves to the hammer stop state. Therefore, this switching means 10
When 6 is not abutting (normal hammer striking condition),
For each key, the hammer approach can be adjusted as close as possible to an ordinary piano, so the touch of the keys is almost the same as that of an ordinary piano.

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 state where the strings and actions of the upright piano according to this embodiment are in a resting state.

In this embodiment, hammer wood 1
An L-shaped curved plate 110 is fixed by a round screw 111 to the upper surface of the hammer wood 13A at the connecting portion between the 3A and the normal hammer shank 114. In detail, curved plate 110
110A is a length protruding outside the rotation range (broken line in the figure) of the hammer felt 13B, and the short side 110B of the curved plate 110 is fixed to the upper surface of the hammer wood 13A. The switching means 106 (not shown) has the same configuration as that of the first embodiment. When the switching means 106 is in contact, the hammer stopper 102 is held by the stopper rail inside the rotation range (broken line in the figure) of the longitudinal direction 110A of the curved plate 110 and outside the rotation range of the hammer felt 13B. is there. The other structure is the same as that of the first embodiment.

Compared with the first embodiment, this embodiment can use a normal hammer shank 114. Furthermore, it is easy to replace the curved plate 110 as the protruding body. Other functions are the same as those in the first embodiment.

Next, as shown in FIG. 3, the curved plate 110 provided on the hammer wood 13A of the second embodiment is changed to
A third embodiment of the keyboard musical instrument of the present invention in which a ladle-shaped plate 120 is fixed with round screws 111 will be described. Also in this embodiment, the handle 120A of the plate 120 has a length protruding to the outside of the rotation range (in the figure) of the hammer felt 13B, as in the first and second embodiments. In addition, a ladle-shaped plate 121 that is tilted in response to swinging of the low-pitched hammer (applied to the pitched range of the hammer) may be attached to the low-pitched hammer wood 13A. Furthermore, the plate 12
The well-known capstan screw 122 for a grand piano held by the stopper rail 103 is provided inside the turning range of the 0 length 120A (broken line in the drawing) and outside the turning range of the hammer felt 13B. The other structure is the same as that of the second embodiment.

This embodiment is different from the second embodiment in that
Since the round screw 111 is fixed from the player side (the left side in the figure), the plate 120 as a projecting body can be easily replaced. Other functions are the same as those in the second embodiment.

Next, as shown in FIG. 4, a fourth embodiment will be described in which the side surface of the hammer head 13A is machined to attach the locking member 130 to the machined portion by adhesion.
The locking member 130 also projects outside the rotation range (broken line in the figure) of the hammer felt 13B. The hammer stopper 10 held by the stopper rail 103 is provided inside the rotation range (broken line in the figure) of the protrusion 130A of the locking member 130 and outside the rotation range of the hammer felt 13B.
2 is provided. The other configurations are the second
Same as the embodiment.

In this embodiment, as compared with the second and third embodiments, the locking member 130 as a protrusion can be fixed without using the round screw 111. Other functions are the same as those in the second embodiment.

Next, a fifth embodiment will be described with reference to FIGS. In this embodiment, an L-shaped protrusion 140 is attached to the upper part of a normal hammer shank 114. As shown in FIG. 6, the protrusion 140 is
Left protrusion 1 having a half-hole 141A formed in a part thereof
41 and a right protruding body 142 having a half hole 142A formed in a part thereof. Half-hole 1 of the left protrusion 141
The hammer shank 114 is provided between 41A and the half hole 142A of the right protruding body 142, and is fixed by using screws 143 and 144. Longitudinal 140 of protrusion 140 in FIG.
A is the rotation range of the hammer felt 13B (broken line in the figure)
It protrudes to the outside of. Longitudinal 14 of protrusion 140
The same capstan screw 1 as that of the third embodiment held by the stopper rail 103 inside the turning range of 0A (broken line in the figure) and outside the turning range of the hammer felt 13B.
22 is provided. A hole 146 is formed in the capstan screw 122. Adjustment pin 1
Insert the tip of 45 into this hole 146, and adjust pin 145
Is rotated to finely adjust the distance between the length 140A of the protrusion and the leather portion 122A of the capstan screw 122. The other configurations are the second
Same as the embodiment.

This embodiment, like the third embodiment,
When the switching means 106 (not shown) is brought into contact, the distance at which the capstan screw 122 is screwed into the stopper rail 103, that is, the hammer stop position immediately before striking the string can be adjusted. Compared with the first to fourth embodiments, the hammer head 13 and the hammer shank 114 do not need to be machined. Other functions are the same as those in the fourth embodiment.

The keyboard instrument according to the present invention may be used in a grand piano.

[0033]

As described above, in the keyboard instrument according to the present invention, the mechanism for stopping the rotation of the hammer immediately before striking the string is provided outside the swing range of the hammer so that the striking sound is not generated. However, the touch of the key is not hindered.

[Brief description of drawings]

FIG. 1 is a side view showing a rest 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 state in which strings and actions of the upright piano according to the second embodiment of the present invention are in a rest state.

FIG. 3 is an explanatory diagram showing a main part of an upright piano according to a third embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a main part of an upright piano according to a fourth embodiment of the present invention.

FIG. 5 is a side view showing a rest state of strings and actions of an upright piano according to a fifth embodiment of the present invention.

FIG. 6 is a perspective view showing a main part of an upright piano according to a fifth embodiment of the present invention.

[Explanation of symbols]

11 strings, 13 Hammerhead, 14 hammer shank, 33 Jack, 101 protrusion, 102 hammer stopper, 106 switching means.

Claims (2)

[Claims] 1. A keyboard instrument having an upright piano string and an action, wherein at least one end of the action is provided on a hammer shank, and the hammer swings to hit the string, and the hammer. A key for transmitting a force to the jack, a stopper provided so as to be able to contact the hammer shank of the hammer immediately before the hammer hits the string, and the hammer shank. And a switching means for moving the stopper to an abutting position or a non-abutting position according to an operation, and at the non-abutting position, the hammer strikes the string to produce a sound by striking the string. At the abutting position, the hammer does not hit the string and the electronic sound source can generate sound without striking the string. A keyboard instrument characterized in that the replacement means is a pedal. 2. A keyboard instrument having an upright piano string and an action, wherein the action has a hammer, at least one end of which is provided on a hammer shank, and which pivots to strike the string.
A jack for pushing up and rotating the hammer, a key for transmitting a force to the jack, a stopper provided so as to be able to come into contact with the hammer shank of the hammer immediately before the hammer strikes the string, and A switching means for moving the stopper to an abutting position with the hammer shank or a non-abutting position according to an operation is provided, and at the non-abutting position, the strings are struck by the hammer to strike the strings. At the contact position, the hammer makes it possible to generate sound from the electronic sound source without hitting the strings without hitting the strings, and by the switching means, when the stopper is not in contact, each key is A keyboard instrument characterized by finely adjustable stoppers.