JP3484680B2 - Keyboard instrument - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard instrument, and provides a mechanism for stopping the rotation of a hammer immediately before striking a string and immediately bounces back outside the rotation range of the hammer head. Thus, even if the stringing sound is not generated, the touch of the key is not hindered. 2. Description of the Related Art Conventionally, there has been proposed a keyboard instrument in which the sound produced by striking a string is changed as described in Japanese Utility Model Laid-Open Publication No. 51-67732. 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 with the elastic body, this kinetic energy is weakened, and the sound volume due to the striking is effectively reduced without disturbing the sound quality and the sound of the strings. . [0003] However, in such a keyboard instrument, it is necessary to sacrifice the touch of a key to some extent when the sounding of the string is not completely generated. There were challenges. That is, it is necessary to bring the stopper closer to the hammer shank side in order to prevent the occurrence of the hammering sound. At this time,
In normal approach (the distance between the string and the hammer head when the bat of the hammer assembly no longer receives the thrust from the jack and begins free rotation), the bat of the hammer assembly escapes from the jack. In addition, the hammer assembly is pinched by the jack and the stopper and stopped, making it difficult to hit
You will not be able to perform like a conventional piano. To prevent this, access must be wider than usual. That is, the time when the bat separates from the jack is adjusted earlier. In this case, the touch of the key changes, the stopper is moved to a position where it does not contact the hammer shank, and when sound is generated by striking the string, the energy supplied by the jack decreases due to early escape, Since the impact force of the hammer is weakened, the tone produced by striking the strings becomes slightly softer. In addition, the continuous tapping performance of the keyboard is somewhat deteriorated. Accordingly, an object of the present invention is to provide a mechanism for stopping the rotation of the hammer just before striking the string outside the rotation range of the hammer head, so that the key can be touched even if the striking sound is not generated. It is to provide a keyboard instrument that is not hindered. [0005] In the keyboard musical instrument of the present invention, a stretched string, a hammer that rotates and strikes the string, a jack that pushes up and rotates the hammer, And a key for transmitting power to the jack, wherein the hammer strikes the string before the hammer strikes the string.
A stopper for stopping the rotation of the hammer, and the hammer
The hammer can be struck by this stopper
Switch between a state in which the rotation operation is stopped before hitting
As a switching means for moving the stopper, the scan
Adjust the stop position of the hammer by the topper for each key.
Knot means. In the keyboard instrument according to the present invention, the stopper
When the rotation of the hammer is stopped by the hammer
When a string is struck, the force corresponding to the keystroke is
It is transmitted to Jack. This allows Jack to lower the hammer
And rotate it. When approaching a hammer when striking a string,
As usual. And the hammer strikes the strings. Only
When the rotation is stopped by the switching means, the strings and the hammer
Is provided between them. Because of this, the hammer
Immediately before striking the string, the hammer contacts the stopper. This
Hammer bounces without striking
It is. Therefore, when the rotation operation is stopped by the switching means
In some cases, the hammer does not strike the strings. This place
If you do not have to widen the approach greatly in advance by incorporating errors
Is also good. Therefore, the approach of the hammer at this time is normal.
It is. For this reason, the jack can be disconnected in the same way as during normal performance.
Move forward. On the other hand, when the strings are struck by the switching means, for example,
The stopper moves outside the range of rotation of the hammer. Han
Ma stops after being pushed up by Jack
Is not shut off. Therefore, at the time of string striking by the switching means
Is used for striking strings as usual. in this case,
For example, a sound is generated from an electronic sound source. 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 substantially vertically. In the figure, one of them is taken out and shown. An action is provided for the string 11. This action mainly consists of a hammer head 13 that rotates clockwise in the figure and hits the string 11, and a hammer shank 14 that is connected to the hammer head 13 and that is made of hornwood or maple wood.
And The hammer head 13 is obtained by covering a hammer wood 13A with an egg-shaped hammer felt 13B. The hammer wood 13 </ b> A has a hole 100 formed at a portion connected to 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 (dashed line in the figure) of the hammer felt 13B. That is, the hammer shank 14 is longer than a normal hammer shank. The projection 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 rotation range of 01 (broken line in the figure) and outside the rotation range of the hammer felt 13B. The hammer stopper 102 is similar to a well-known regulating button. The hammer stopper 102 has its screw portion 102A screwed into the stopper rail 103 and held. The hammer stopper 102 has a cushioning material 102B such as leather, felt, or the like attached to a surface of the hammer shank 14 facing the protrusion 101. The stopper rail 103 is provided so as to extend in common across the 88 keys arranged corresponding to the strings 11. Further, the switching means 106 switches the hammer rail 103 in two directions when the hammer rail 103 is in contact or non-contact by operating a lever or a pedal. At the time of contact of the switching means 106, the stopper rail 103
It rotates around the pin 104 in the clockwise direction in the figure (direction approaching the hammer felt 13B) and is fixed substantially vertically. When the switching means 106 is not in contact, the stopper rail 103 rotates about the pin 104 in a counterclockwise direction in the figure (a 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 (between the broken lines in the figure) of the protrusion 101 of the hammer shank 14. On the other hand, when the switching means 106 is not in contact, the hammer stopper 102 is located outside the rotation range of the protrusion 101 of the hammer shank 14.
Is held by When the switching means 106 is not in contact, the screw 102A of the hammer stopper 102 is rotated using the adjusting tool 105, and the length of the hammer stopper 102 projecting from the stopper rail 103 is independently determined for each key. Can be fine-tuned. That is, at the time of contact of the switching means 106, the distance between the leather 102B of the hammer stopper 102 and the protruding portion 101 of the hammer shank 14 is set to 88 hammer approaches (for example, low range 3 mm, middle range 2.5).
mm, treble 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. The butt 15 is a hammer shank 1
4 is fixed to the base end. The center pin 17 supports the bat 15 so as to be swingable. A butt spring 16 is attached to the right end of the bat 15.
The butt spring 16 always biases the bat 15 in a counterclockwise direction in the drawing. On the other hand, a catcher shank 18 protrudes from the left end of the bat 15 and is connected thereto. A catcher 19 is fixedly mounted on the tip of the catcher shank 18. Reference numeral 28 denotes a center rail which extends 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, a pen (not shown) is rotatably attached to the lower end of the center rail 28. The wippen is provided so as to protrude horizontally from the center rail 28. An L-shaped jack 33 is erected on the upper surface of the pen on the left side of the center rail 28 so as to be swingable. The tip (top end) of this jack 33 is
It is in contact with the lower end surface of the bat 15. Jack 33
Transmits a turning force in the clockwise direction in the figure according to the keying of a key (not shown) to the bat 15, and pushes up and rotates the hammer head 13 and the hammer shank 14 from below via the bat 15. is there. The operation of the upright piano according to the above configuration will be described below separately for when the switching means 106 is in contact and when it is not. The action of switching the switching means 106 to contact is that the hammer stopper 102
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 pressed, the jack 33 is pushed up according to the key. At the same time, the damper 43 separates from the string 11. On the other hand, the rise of the jack 33
And pivot the bat 15 about the center pin 17 in the clockwise direction in the figure. For this reason, bat 15
The hammer head 13 and the hammer shank 14 provided in are rotated clockwise in FIG. However, when the jack 33 rises by a certain height, the jack tail (not shown) comes into contact with 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 clockwise in the figure due to their inertia and attempt to strike the string 11. However, immediately before the hammer head 13 hits the string 11, the protrusion 101 of the hammer shank 14 is used as the buffer material 10 such as leather felt of the hammer stopper 102.
Contact 2B. After this contact, the hammer head 13 is rebounded without hitting the string 11 by the urging force of the butt spring 16. As a result, the bat 15 rotates counterclockwise in the figure around the center pin 17. And catcher skin 19A contacts 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, when the switching means 106 is in contact (when the hammer is not struck), the string 1
There is no pronunciation from 1 In this hammer non-stringed state, the key
Key sensors and hammer cells used in automatic pianos, etc.
Sound from an electronic sound source based on performance information
Can be. You can listen to this sound using headphones,
You may listen by lowering the volume of the speaker. That is, at night,
Even during the daytime, when the user does not want to output the sound of the piano, he can enjoy the performance of the piano without losing the touch without causing the strings to sound. The action in which the switching means 106 is switched out of contact is that the hammer stopper 102 moves outside the range of rotation of the protrusion 101 of the hammer shank 14. In this action, when the jack 33 is pushed up in response to a keystroke, the jack 33 rotates the bat 15 and the bat 15 escapes from the jack 33 in the same manner as when the switching means 106 abuts. The hammer shank 13 and the hammer shank 14 continue to rotate clockwise in the figure due to their inertia and attempt to strike the string 11. Since the rotation of the hammer head 13 is not interrupted by the hammer stopper 102, the strings 11
Is hit as usual. Even after this string, as usual,
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. And catcher skin 19
A 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 in a normal performance and moves to the hammer stop state. Therefore, this switching means 10
At the time of non-contact of 6 (the hammer's normal striking state),
Since the hammer approach can be adjusted as close as possible to a normal piano for each key, the touch of the keys is almost the same as that of a normal 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 the strings of the upright piano and the resting state of the action according to this embodiment. In this embodiment, the hammerwood 1
An L-shaped curved plate 110 is fixed by a round screw 111 on the upper surface of the hammer wood 13A at the portion where the 3A and the normal hammer shank 114 are connected. More specifically, curved plate 110
Has a length protruding outside the rotation range (dashed 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 in the first embodiment. When the switching means 106 abuts, the hammer stopper 102 is held by a stopper rail inside the rotation range of the longitudinal 110A of the curved plate 110 (broken line in the figure) and outside the rotation range of the hammer felt 13B. is there. The other configuration is the same as that of the first embodiment. In this embodiment, a normal hammer shank 114 can be used as compared with the first embodiment. Further, it is easy to replace the curved plate 110 as a protrusion. Other operations are the same as those of 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,
A third embodiment of the keyboard instrument of the present invention in which the ladle-shaped plate 120 is fixed with the round screw 111 will be described. Also in this embodiment, the handle 120A of the plate 120 has a length protruding outside the turning range (in the drawing) of the hammer felt 13B as in the first and second embodiments. In addition, a ladle-shaped plate 121 that is inclined corresponding to the swing of the bass hammer (applied to the range where the hammer is inclined) may be attached to the bass hammer wood 13A. Further, the plate 12
A well-known capstan screw 122 for a grand piano held by the stopper rail 103 is provided inside the rotation range (dashed line in the figure) of the zero length 120A and outside the rotation range of the hammer felt 13B. The other configuration 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 (left side in the figure), it is easy to replace the plate 120 as a protruding body. Other operations are the same as those of the second embodiment. Next, as shown in FIG. 4, a description will be given of a fourth embodiment in which the side surface of the hammer head 13A is cut and the locking member 130 is fitted to the cut portion by bonding.
The locking member 130 also protrudes outside the rotation range (dashed 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 (dashed line in the figure) of the protrusion 130A of the locking member 130 and outside the rotation range of the hammer felt 13B.
2 are provided. The other configuration is the second
This is the 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 operations are the same as those of 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.
Left projecting body 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 left protrusion 141
A hammer shank 114 is provided between 41A and the half hole 142A of the right protruding body 142, and is fixed using screws 143, 144. 5, the length 140 of the protruding body 140 in FIG.
A is the rotation range of the hammer felt 13B (broken line in the figure)
It protrudes to the outside. Length 14 of protrusion 140
The same capstan screw 1 as that of the third embodiment, which is held by the stopper rail 103, is inside the rotation range of 0A (broken line in the figure) and outside the rotation range of the hammer felt 13B.
22 are provided. The capstan screw 122 has a hole 146 formed therein. Adjustment pin 1
45 is inserted into this hole 146 and the adjustment pin 145 is inserted.
Is rotated to finely adjust the distance between the length 140A of the protruding body and the leather portion 122A of the capstan screw 122. The other configuration is the second
This is the same as the embodiment. This embodiment is similar to the third embodiment,
When the switching means 106 (not shown) abuts, the distance at which the capstan screw 122 is screwed into the stopper rail 103, that is, the stop position of the hammer immediately before striking can be adjusted. Compared to the first to fourth embodiments, the hammer head 13 and the hammer shank 114 do not require processing. Other operations are the same as those of the fourth embodiment. The keyboard instrument according to the present invention may be used for a grand piano. As described above, in the keyboard instrument according to the present invention, a striking sound is generated by providing a mechanism for stopping the rotation of the hammer just before striking the string outside the turning range of the hammer. Even if it is not performed, the touch of the key is not disturbed.

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 pause state of strings and actions of an upright piano according to a second embodiment of the present invention. 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 pause 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. [Description of Signs] 11 strings, 13 hammer head, 14 hammer shank, 33 jack, 101 protrusion, 102 hammer stopper, 106 switching means

Continuation of the front page (56) References Japanese Utility Model Showa 51-67732 (JP, U) Japanese Utility Model Showa 51-150130 (JP, U) Japanese Patent Publication No. 43-9273 (JP, B1) Japanese Utility Model Showa 46-34754 (JP) , Y1) West German Patent 3707951 (DE, B) Patent 3317363 (JP, B2) Patent 2591404 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) G10C 3/16 G10C 1/02

Claims (1)

(57) [Claims] [Claim 1] A stretched string, a hammer that rotates and strikes the string, a jack that pushes up the hammer to rotate, and transmits a force to the jack. And a key having a key to rotate the hammer before hitting the string.
A stopper that stops the operation, a state in which the hammer can strike a string, and the stopper
To stop the hammer's rotation before hitting
Switching means for moving the stopper so as to switch, and the stop position of the hammer by the stopper is adjusted for each key.
A keyboard instrument comprising: an adjusting unit that adjusts the pitch.