JPH0675559A - Keyed musical instrument - Google Patents

Abstract

PURPOSE:To perform switching between performance without string beat, which does not emit string beat sounds, and normal performance, which does not hinder a touch on a key, without hindering a touch on the key by changing the value of hammer approach and changing the value of hammer return. CONSTITUTION:This keyed musical instrument is provided with a stretched string 200, a hammer head 201 which is turned to beat the string 200, a jack 208 which thrusts up and releases a hammer roll 205, a hammer stopper 120 which has a prescribed value of hammer return and has a prescribed value of hammer approach at the time of beating the string and stops the hammer head 201 from beating the string, a translation cam 231 which makes the value of hammer approach wider than the prescribed value at the time of stopping beating of the string by the hammer stopper 231, and a spacer 233 for repetition regulating screw which makes the value of hammer return earlier than the prescribed value at the time of stopping beating of the string.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard instrument, and a value of a hammer approach (a distance between a striking surface of a hammer assembly and a string when the hammer assembly starts free rotation motion without receiving thrust force from a jack). Can be changed, and the hammer return (press the key gradually,
By making it possible to change the value of the position where the hammer assembly rotates in the direction opposite to the string striking direction after passing the hammer approach point, non-string striking performance that does not generate a string striking sound without disturbing the key touch , It is possible to switch between normal performance that does not hinder the touch of keys and normal performance.

[0002]

2. Description of the Related Art Heretofore, as a keyboard instrument in which pronunciation by striking a string has been changed, one disclosed in Japanese Utility Model Laid-Open No. 51-67732 has been proposed. This keyboard instrument has a stopper having an elastic body on the surface facing the hammer shank between the string and the hammer shank of the hammer assembly, and the rotating hammer shank is received by the stopper via the elastic body. Is. 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, normal hammer approach,
It remains about 2 mm. At this hammer approach value, before the hammer assembly leaves the jack,
The hammer shank is caught and stopped by the jack and the stopper, making it difficult to hit repeatedly, making it impossible to perform like a conventional piano. To prevent this, make the hammer approach wider than usual, for example 5 to
It should be about 7 mm. Furthermore, the hammer return must be increased corresponding to the approach of the hammer. In other words, the time when the hammer assembly leaves the jack is adjusted early. In this way, the touch of the key changes, the stopper is moved to a position where it does not contact the hammer shank, and during the normal performance in which a sound is generated by striking a string, the energy supplied by the jack is reduced due to an early escape. However, since the impact force of the hammer is weakened, the tone produced by striking the strings becomes a little softer. In other words, it had a touch like a harpsichord. In addition, the repeated hitting property of the keyboard was somewhat deteriorated.

Therefore, an object of the present invention is to change the value of the hammer approach and the value of the hammer return so that a non-striking performance that does not generate a striking sound without disturbing the touch of a key is generated. It is to provide a keyboard instrument capable of switching between a normal performance that does not hinder the touch of keys and a normal performance.

[0006]

DISCLOSURE OF THE INVENTION A keyboard instrument of the present invention comprises a string that is stretched, a hammer assembly that pivots and strikes the string, and a jack that pushes up the hammer assembly and causes the hammer assembly to escape. And a key for transmitting a force for rotating the jack, the hammer return has a predetermined value, and the hammer approach has a predetermined value when striking a string. Blocking means for blocking the strings, first changing means for making the hammer approach value wider than the predetermined value when the stringing is blocked by the blocking means, and the hammer return for setting the hammer return to the predetermined value when blocking the strings. And a second changing means for making it faster.

[0007]

In the keyboard instrument according to the present invention, when the hammer assembly is in the non-striking state, the hammer approach is larger than the predetermined value and the hammer return is earlier than the predetermined value.
As a result, the hammer assembly escapes from the jack earlier, and the key touch is not hindered. On the other hand, the hammer assembly is ready for striking, and the hammer approach and hammer return return to predetermined values. Therefore, in the normal playing state, the touch of the key is normal.
Therefore, it is possible to switch the non-string-striking performance in which the string-striking sound is not generated and the normal performance without hindering the touch of the 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 an idle state of an action of a grand piano according to an embodiment of a keyboard instrument of the present invention.

In this figure, the strings 20 are associated with the respective pitches.
0 is stretched almost horizontally. This string 20
The hammer assembly is arranged corresponding to zero. This hammer assembly includes a hammer head 201 that strikes a string 200 by rotating in a clockwise direction in the drawing around a pin 204, a hammer shank 202 that is connected to the hammer head 201, and a base of the hammer shank 202. A hammer shank flange 203 that rotatably supports a hammer shank 202 at the end, a hammer roller 205 provided on the proximal end side of the hammer shank 202, and a repetition regulation screw 234 for adjusting the hammer return. And are equipped with.

A repetition lever 206 is in contact with the hammer roller 205 of the hammer assembly. This repetition lever 206 supports 2
It is rotatably supported by 07. This support 207
A jack 208 is rotatably supported at the right end of the. The tip (top end) of the large jack 208A of the jack 208 has a long hole 206 of the repetition lever 206.
It passes through A and contacts the lower surface of the hammer roller 205. The jack 208 transmits the turning force in the clockwise direction in the drawing corresponding to the keystroke to the hammer assembly. A regulating button 209 is provided at a position where the upper surface of the small jack 208B can abut when the key is pressed.

Specifically, the hammer shank flange 20
On the lower surface of the shank 3, a shank rail 210 is transversely extended over the entire 88 keys arranged corresponding to the strings 200. The shank rail 210 holds a regulating rail 211 via a flexible regulating rail support member 230 having a U-shaped cross section. The regulating button 209 is screwed into the lower portion of the regulating rail 211. On the lower surface of the regulation button 209, a regulation button punching 209A made of leather or the like is attached.

A linear cam 231 is disposed above the regulating rail 211 in a gap with the shank rail 210. As shown in an enlarged manner in FIGS. 2 and 3, a predetermined number of protrusions 231A are formed in the lower portion of the linear motion cam 231. Further, on the upper surface of the regulating rail 211, a projection 232 having rounded corners, such as a head of a round screw, is formed on the projection 23 of the linear cam 231.
1A is fixed to each. When the linear cam 231 horizontally moves to the right in FIG. 2, the protrusion 231A of the linear cam 231 lowers the regulating rail 211 via the round protrusion 232 at a predetermined position, as shown in FIG. . At this time, the regulating button 209 is lowered by about 1 mm.

Although not shown in FIGS. 2 and 3, as shown in FIG. 4, the linear cam 231 holds a spacer 233 for the repetition regulating screw 234. The tip of the spacer 233 is, as shown in FIG. 1, a repetition regulation screw 2
34 and the regulating lever skin 206B. The tip of the spacer 233 is formed in a comb-like shape as a whole. The pitch of each protrusion 233A is the same as the pitch of each action corresponding to 88 keys. Only when the regulation button 209 is lowered, the protrusions 233A of the spacer 233 are inserted into the gaps between the repetition regulation screw 234 and the regulation lever skin 206B. That is, when the regulation button 209 is not lowered, the normal hammer return is performed without being interrupted by the protrusions 233A of the spacer 233 between the regulation regulation screw 234 and the regulation lever skin 206B.

The linear cam 231 is provided with the switching means 12
2 are connected to the respective control circuits. This control circuit has a built-in switch. This changeover switch is changed over by operating a lever or a pedal. Then, the control circuit drives the linear cam 231 in the horizontal direction in response to this switching.

That is, when the switching means 122 switches to the non-striking state, the linear cam 231 moves to the position shown in FIG. As a result, each regulation button 209
Is lowered by about 1 mm, and each protrusion 233A of the spacer 233 is located between each repetition regulation screw 234 and each regulation lever skin 206B. Hammer approach is wider than normal and hammer return is faster than normal.

When the switching means 122 switches to the string striking state, the linear cam 231 moves to the position shown in FIG. As a result, each regulation button 209 moves to the normal position, and each protrusion 233A of the spacer 233 separates from each repetition regulation screw 234 and each regulation lever skin 206B.
You can achieve normal hammer approach and normal hammer return. The linear cam 231 may be mechanically connected to a pedal or an operation lever to drive.

A capstan 220 is in contact with the lower surface of the support 207. The capstan 220 is provided on the upper surface of the rear end portion of the key 221 so as to project.

Then, the hammer shank 202 and the string 20
Between 0, the hammer stopper 12 shown enlarged in FIG.
0 is set. This hammer stopper 120
A holding portion 120A such as a steel strip extending in the key arrangement direction, a rotating shaft 120B pivotally supported by a bearing attached to a bending column outside the iron frame supporting the strings 11, and the rotating shaft 120B.
And a cushion 120C such as a felt which is divided into four (not shown) and fixed to the lower surface of the holding portion 120A in the figure. The rotating shaft 120B is rotated by the switching means 122 in a predetermined angle range via, for example, a motor, and the cushion 1
20C is moved to two positions, a contact position and a non-contact position on the hammer shank 202. That is, the control circuit of the switching means 122 applies an output signal corresponding to the playing state to the motor to rotate the hammer stopper 120 to a predetermined position. A bearing may be provided on the bending side.

That is, when the switching means 122 switches to the non-striking state, the cushion 120C of the hammer stopper 120 rotates to a position (broken line in FIG. 1) facing the hammer shank 202 and stops. In this case, when the hammer head 201 rotates toward the string 200 by keystroke, the hammer shank 202 comes into contact with the cushion 120C of the hammer stopper 120 to prevent the hammerhead 201 from striking the string. Also, switching means 1
When the string striking state is switched by 22, the cushion 120C of the hammer stopper 120 rotates to a position parallel to the string 200 and stops (solid line in FIG. 1). In this case, even if the hammer head 201 is rotated in the direction of the string 200 by hitting the key, the hammer shank 202 will not move to the hammer stopper 1.
Since it does not contact the cushion 120C of 20, the hammer head 201 hits the string as usual.

The operation of the grand piano having the above-described structure will be described below for each of the switching states of the switching means 122.

When the switching means 122 is switched to the non-striking state, the linear cam 231 horizontally moves to the position shown in FIG.
Therefore, the protrusion 231A of the linear motion cam 231 abuts the protrusion 232 of the regulating rail 211 while pushing down the regulating rail 211. Then, the regulating button 209 is lowered about 1 mm from the normal position. At the same time, the spacer 23 fixed to the linear cam 231
3 also moves horizontally. Therefore, each protruding portion 233A of the spacer 233 moves to a gap between each repetition regulation screw 234 and each regulation lever skin 206B. The height of the lower surface of the protruding portion 233A of the spacer 233 when moved is about 1 mm lower than the height of the lower surface of the head of the repetition regulation screw 234. Further, the hammer stopper 120 stops at a position facing the hammer shank 202 (broken line in FIG. 1).

When a key is pressed, the capstan 220 lifts the support 207 in response to the key press. After this, the jack 208 pushes up the hammer roller 205. As a result, the hammer head 201 and the hammer shank 202 rotate clockwise in the drawing. When the jack 208 moves up to a position about 1 mm lower than in the normal performance, the tip of the small jack 208B comes into contact with the regulating button punching 209A.
As a result, the rise of the jack 208 is blocked earlier than during normal playing, and the jack 208 pushes the hammer roller 205 away. The value of the hammer approach at this time is about 5 to 7 mm, which is larger than the usual value of 2 to 3 mm. When the repetition lever 206 moves up to a position about 1 mm lower than in the normal performance, the repetition lever skin 206B causes the protrusion 2 of the spacer 233 to move.
33A, the repetition lever 206 stops rising. The hammer return is also about 2 mm below this approach point. After this, the hammer head 201 still continues to rotate clockwise in the figure due to its inertia,
Trying to hit 00.

However, the hammerhead 201 causes the string 200 to
Immediately before hitting, the hammer shank 202 contacts the cushion 120C of the hammer stopper 120. After this contact, the hammer head 201 is repelled without hitting the string 200. As a result, the hammer shank 20
2 abuts the hammer shank stop felt 222. That is, when switching to the non-string striking state, the hammer head 201 does not strike the string and moves to the hammer stop state. Therefore, at this time, the string 20
Never pronounce from 0.

In this state, in response to a key press, an electronic sound source based on performance information such as a key sensor or a hammer sensor used in an automatic piano or the like may be used to generate a sound. 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 produce the live sound of the grand piano, you can enjoy the performance of the grand piano without sounding the strings.

On the other hand, when the switching means 122 switches to the string striking state, the linear cam 231 is moved to the position shown in FIG.
Moves. At this time, the regulation button 209 is returned to the normal position, and each protrusion 233A of the spacer 233 is not located in the gap between the head of each repetition regulation screw 234 and the repetition lever skin 206B. . At the same time, the plate portion 120A of the hammer stopper 120 rotates to a position parallel to the string 200 and stops (solid line in FIG. 1).

Then, the capstan 220 is pressed according to the key depression.
Lifts the support 207. Jack 208 pushes up hammer roller 205. Hammer roller 2
No. 05 escapes from the jack 208 at the normal performance position, and the hammer approaching value is about 2 mm, which is the same as the normal performance. When the repetition lever 206 rises to the same position as during normal performance, the repetition lever skin 206B
However, it abuts against the head of the repetition regulation screw 234, and the rise of the repetition lever 206 is stopped. The hammer return is also 2 mm below this approach point. After that, the hammer head 201 continues to rotate in the clockwise direction in the figure due to its inertia, and strikes the string 200 as a normal performance without being blocked by the hammer stopper 120. Even after this string striking, the hammer head 201 is repelled by the repulsive force of the string 200 as in the normal performance. Then, the hammer shank 202 contacts the hammer shank stop felt 222. That is, in the string striking state, the hammer head 201 strikes the string as in a normal performance and moves to the hammer stop state.

Therefore, by making it possible to change the value of the hammer approach and the position of the hammer return, it is possible to realize the non-string striking performance in which the striking sound is not generated without disturbing the touch of the key and the touch of the key. Normal performance that does not interfere,
Can be switched. Also, hammer stopper 1
By moving only 20 to an intermediate position between the positions indicated by the solid line and the broken line in FIG. 1, it is possible to perform weak string striking. In this case, since the normal hammer approach size is enough,
It is not necessary to provide the linear cam 231.

FIG. 6 and FIG. 7 show a second keyboard instrument according to the present invention.
An example is shown. In this embodiment, a hammer stopper 300 is used instead of the hammer stopper 120. As shown in an enlarged view in FIG. 7, the hammer stopper 300 is also axially supported by a holding portion 300A extending in the key arrangement direction and a holding portion 300A such as a strip of steel, and a bearing attached to a bending column on the outer side of an iron frame supporting the strings 11. Rotating shaft 300B
A connecting portion 300D that connects the rotating shaft 300B to the holding portion 300A, and a cushion 300C such as a felt that is divided into four (not shown) and fixed to the lower surface of the holding portion 300A in FIG. 7 are provided. . However, the holding portion 300A
Has a tapered projection for positioning.

Then, in the action section division portion (the position where the action bracket is located), the right surface of the shank rail 210 in the figure and the support rail 302.
A supporting frame 301 having a substantially Γ-shaped cross section is fixed to the right surface in the figure with screws. The flexible regulating rail support member 230 having a U-shaped cross section is screwed to the shank rail 210 together with the support frame 301. This support frame 3
In 01, a recess 303 is provided above the hammer shank 202 in the key arrangement direction so that the recess 303 can be fitted to the protrusion of the holding portion 300A of the hammer stopper 300.
Other configurations are the same as those in the first embodiment.

When the switching means 122 is switched to the non-striking state, the protrusion of the holding portion 300A of the hammer stopper 300 is fitted into the recess 303. Hammer shank 202
The string striking energy of can be received more firmly than in the first embodiment. Other functions are the same as those in the first embodiment.

Next, referring to FIGS. 8 and 9, the third embodiment of the present invention will be described.
An example will be described. Also in this embodiment, a hammer stopper 310 is used instead of the hammer stopper 120. The hammer stopper 310 shown enlarged in FIG.
A plate-shaped holding portion 310A extending in the key arrangement direction, a rotary shaft 310B pivotally supported by the bearing, and a rotary shaft 310B.
And a cushion 310 such as a felt that is fixed to the lower surface of the holding portion 310A shown by the solid line in FIG. 8 by being divided into four (not shown).
And C. However, the holding portion 310A is the first
The hammer stopper 120 of the embodiment is connected to the connecting portion 310D while being inclined by 90 degrees with respect to the holding portion 120B. As shown in FIG. 9, the connecting portion 310D is formed by cutting out the lower portion of the angle. The holding portion 310A is fixed to the cutout portion.

Then, in the action section division part, on the right surface of the shank rail 210 in the drawing and on the left surface of the support rail 302 in the drawing, a support frame 31 having a substantially Γ-shaped cross section is formed.
2 is fixed with screws. The hammer stopper 1 of the first embodiment is provided on the lower surface of the protrusion 312A of the support frame 312.
The same rigid body 311 as the holding portion 120A of 20 extends in the key arrangement direction. Other configurations are the same as those in the first embodiment.

Then, when the switching means 122 is switched to the non-striking state, the cushion 3 of the hammer stopper 310 is
10C rotates below the rigid body 311. in this way,
Since the hammer stopper 310, which is lighter in weight than the rigid body 311, is rotated, the load during this rotation can be reduced. Other functions are the same as those in the first embodiment.

[0034]

As described above, according to the present invention, it is possible to change the value of the hammer approach and the value of the hammer return, so that the string striking sound can be obtained without disturbing the touch of the key. It is possible to switch between a non-string-striking performance that does not generate a key and a normal performance that does not hinder the touch of a key.

[Brief description of drawings]

FIG. 1 is a side view showing a rest state of an action of a grand piano according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a regulating button in a string striking state according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a regulating button in a non-striking state according to the first embodiment of the present invention.

FIG. 4 is a plan view of a spacer for a repetition regulating screw according to the first exemplary embodiment of the present invention.

FIG. 5 is a perspective view of a hammer stopper according to the first embodiment of the present invention.

FIG. 6 is a side view showing an action rest state of the grand piano according to the second embodiment of the present invention.

FIG. 7 is a perspective view of a hammer stopper according to a second embodiment of the present invention.

FIG. 8 is a side view showing an idle state of action of the grand piano according to the third embodiment of the present invention.

FIG. 9 is a perspective view of a hammer stopper according to a third embodiment of the present invention.

[Explanation of reference numerals] 120 hammer stopper (blocking means), 200 strings,
201, 202, 205, 234 Hammer assembly, 208 jack, 221 key, 231 Direct acting cam (first changing means), 233 Spacer (second changing means)

Claims (1)

[Claims] 1. A tensioned string, a hammer assembly that pivots to strike the string, a jack that pushes up the hammer assembly to escape the hammer assembly, and a force that rotates the jack. In a keyboard instrument having a key that has a predetermined value for the hammer return and a predetermined value for the hammer approach at the time of striking a string, a blocking means for blocking the striking of the hammer assembly, and the blocking means. A first changing means for making the value of the hammer approach wider than the predetermined value when the string striking is stopped, and a second changing means for making the hammer return earlier than the predetermined value when the striking is stopped. A keyboard instrument characterized by this.