JPS63216099A - Sound stopper for upright piano - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sound stopping device for an upright piano, for example, a sound stopping device used in an upright piano with a built-in electronic sound source.

(Prior Art) Generally, low tone devices such as pianos are employed in pianos with built-in electronic sound sources, or in pianos used for performance practice in apartment complexes or densely populated areas.

The former is needed when playing only with an electronic sound source, and the latter is needed when practicing fingering etc. on a piece of music without making sounds.

Although conventional pianos have sound reduction devices that reduce or soften the sound, there is no sound-stopping device that can almost completely stop the sound. As is well known, in the case of a grand piano, a soft pedal is operated to slide a hammer or the like to reduce the number of strings struck, making the sound softer and quieter. In the case of an upright piano, a muffler pedal is operated to selectively interpose a muffler between the strings and the hammer to reduce the sound. In addition, upright pianos have a soft pedal, and when this soft pedal is pressed, the hammer rail, which is fixed to a rotatably supported hammer rail hinge, moves, which causes the hammer that strikes the string to be held at rest. The position of the string is about one-third closer to the string. Therefore, when a key is struck, the string is struck weaker than when the hammer is stationary at a normal predetermined position, and the sound is weaker.

(Problems to be Solved by the Invention) However, with such conventional sound reduction devices operated by mufflers, soft pedals, etc., it is not possible to enjoy playing by incorporating an electronic sound source into the piano. Even when you want to practice fingering with the sound muted, the sound is produced at a certain level, albeit at a low volume, making it impossible to meet these requirements.

Furthermore, when playing with a built-in electronic sound source, there is a problem in that the keys feel too heavy to touch compared to the electronic piano itself. This is because it operates an action mechanism (lifts a hammer, damper, etc.) that does not exist in an electronic piano.

(Means for Solving the Problems) Therefore, the present invention provides an upright piano having a hammer arranged to be able to strike a string, and a rotatable hammer rail for holding the hammer in a predetermined position. a pressing means for rotating the hammer rail and pressing the hammer against the string;
a locking means for holding the hammer in this pressed state;
It is an object of the present invention to solve the above-mentioned problems by providing a sound stopper for an upright piano, which is equipped with a release means for releasing the pressed state.

(Operations and Effects) In the sound stopping device for an upright piano according to the present invention, the hammer rail is rotated by the pressing means to press the hammer against the string, and the locking means holds the hammer in this pressed state. , no sound is produced even if the key is pressed. Furthermore, when the pressed state is released by the release means, the hammer is separated from the string and is held at a predetermined stationary position for playing by the hammer rail, making it possible to strike the string by pressing the key in the same way as usual.
A predetermined pronunciation can be obtained.

That is, according to the present invention, it is possible to perform (practice) while completely stopping the sound produced by striking the strings, and the present invention is suitable as an upright piano with a built-in electronic sound source. Furthermore, if it is applied to a normal upright piano, it is easy to practice playing with the sound muted. Furthermore, in the case of a piano with a built-in electronic sound source, the touch of the keys can be lightened when performing a performance without the sound of the strings being struck, and the touch of the keys can be similar to that of an electronic keyboard instrument.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 to 4 show an embodiment of a sound stopping device for an upright piano according to the present invention.

As shown in FIG. 1, the rod 5 arranged on the back surface of the bottom plate 3 of the keyboard section 1 has one end 5A disposed on the front side of the keyboard section 1, and the other end 5B bent into a predetermined shape. It is connected to one end of an L-shaped lever 7 rotatably attached to the bottom plate 3. The other end of the L-shaped bar 7 is connected to the lower end of a push-up rod 9 that extends vertically and is movable up and down.

Further, the hammer rail 11 is fixed to a swingably supported hammer rail hinge, and the upper end of the push-up rod 9 is arranged so as to be able to come into contact with the hammer rail 11 from the lower surface, and the push-up rod 9 pushes up the hammer rail 11. When the hammer rail 11 is pressed, the hammer rail 11 rotates counterclockwise in the figure beyond the stationary holding position of the hammer 13 selected by operating the soft pedal, and presses the hammer 13 against the string 15. Note that the strings 15 are stretched in a vertical direction in the piano body.

In the figure, reference numeral 12 denotes a holder that slidably supports one end portion 5A of the rod 5, and is fixed to the back surface of the bottom plate 3.

The above-mentioned rod 5, lever 7, and push-up bar 9 collectively serve as a pressing means 14 for pressing the hammer 13 against the string 15.
It consists of

Figure 2 shows the action mechanism of an upright piano. In the figure, the hammer 13 has a hammer head 17.
It has a hammer shank 19, and a hammer butt 21, which rotates under pressure from a hammer spring 23, and the back surface of the hammer shank 19 is in contact with the hammer rail 11 when a key is not pressed. That is, the hammer rail 11 holds the hammer 13 at a predetermined stationary position at all times. An L-shaped jack 25 that pushes up the lower end of the hammer butt 21 is rotatably supported by the wibben 27. and,
This wippen 27 is lifted by pressing a key (not shown).

Note that 29 indicates a damper assembly, and 31 indicates a priddle tape, respectively. This Pride Luchi 13
1 is, for example, about 20 mm longer than a normal one. Further, 33 indicates a regulating button that comes into contact with the small jack 25A to produce an escape action.

FIG. 3 shows a locking means 35 provided at one end 5A of the rod 5. This locking means 35 fixes and holds the rod 5 in the pushed-in position. When the rod 5 is in this pushing position, the push-up rod 9 is pushed upward via the lever 7, and the hammer 13 is rotated via the hammer rail 11 and pressed against the string 15.

As shown in FIGS. 3 and 4, the locking means 35 includes a recess 37 formed on the lower surface of the bottom plate 3, and a semicircular stopper 39 in the recess 37 that rotates in a direction perpendicular to the sliding direction of the rod 5. I freely support it. Reference numeral 41 indicates a pin that is the center of rotation of the stopper 390, and reference numeral 43 indicates a retractable protrusion that holds the stopper 39 in the storage position. Therefore, as shown in FIG. 4, when the rod 5 is pulled out, the hammer 13
To release from the state pressed against 5, press the stopper 39.
is rotated to the state shown by the dashed-dotted line in the figure and locked by the protrusion 43,
Hold. In order to push in the rod 5 and hold the hammer 13 against the string 15, the protrusion 43 is pushed in and the stopper 39 is rotated as shown to fix the rod 5 in the retracted state. Therefore, the locking means 3
In order to release the locked state of the rod 5 by the release means 45, that is, the stopper 39 and the protrusion 43.

Note that this upright piano is otherwise constructed in the same way as a normal piano, including the sound reduction mechanism using a soft pedal, for example.

In the upright piano sound stop device constructed as described above, the rod 5 is pulled out for normal performance with sound. As a result, the push-up rod 9 is lowered and the hammer rail 11 is held at a predetermined performance position, so that a string-striking operation via the wippen 27, that is, a hammer action, is performed by pressing the key.

When the rod 5 is pushed in and positioned by the stopper 39, the push-up rod 9 rises and rotates the hammer rail 11 counterclockwise by a predetermined angle. As a result, the hammer 13 also rotates together and is pressed against the string 15. Therefore, from now on, unless this locked state is released, the hammer 13 will not strike a string even if the key is pressed.
The sound produced by striking the strings has been stopped. In other words, it is suitable for practicing fingering while stopping the sound. In particular, the hammer 13 and hammer rail 11 are held fixed while the whippen 27 and the like are lifted by pressing a key, making the touch feel light and suitable for performances using electronic tone generators.

To release this state, the stopper 39 of the release means 45 is rotated to engage the protrusion 43, and the rod 5 is pulled out. As a result, the lever 7 rotates, the push-up rod 9 is pulled down, and the restoring force of the hammer spring 23 causes the hammer 13 and the hammer rail 11 to rotate clockwise.

Therefore, from now on, when the key is pressed, it operates as a normal action mechanism, and a predetermined sound can be produced.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing an embodiment of the sound stop device for an upright piano according to the present invention, FIG. 2 is a perspective view showing the main parts of the action mechanism according to the embodiment, and FIG. FIG. 4 is a partial sectional view showing a locking means according to an embodiment; FIG. 4 is a view taken along the line IV-IV in FIG. 3; 11...Hammer rail, 13...Possible hammer, 14...Pushing means, 15...String, 35...Lock means, 45・・・・・・Removal means. Patent applicant: Agent of Nippon Musical Instruments Co., Ltd.
Kiyoshi Kuwai, Patent Attorney - Fig. 1: A narrow side view of the first embodiment Fig. 2: A cross-sectional view of the axillary tower of the first embodiment Fig. 3: A sectional view of the 4-stage lock of the first embodiment Fig. 4: 3 (!l rv-w arrow view

Claims (1)

[Claims] An upright piano that has a hammer arranged to be able to strike a string, and a rotatable hammer rail that holds the hammer in a predetermined position. A sound stopping device for an upright piano, comprising a pressing means for pressing against the hammer, a locking means for holding the hammer in the pressed state, and a release means for releasing the hammer from the pressed state.