JPH02796Y2 - - Google Patents

Description

[Detailed description of the invention] This invention presses the strings when not playing, and when playing, releases the strings to produce sound using a damper operated by an action mechanism linked to key presses on the keyboard. All the dampers are driven separately from the action mechanism to open all the strings, and apart from the vibration of the strings being struck, the resonant resonance of all the opened strings increases the performance of the performer and improves the tone. This is related to the damper mechanism of upright pianos that allows you to obtain the richness of music.

As is well known, in upright pianos,
When not playing, the damper presses the string to suppress its vibration, and when playing, the damper, which is operated by an action mechanism linked to key presses on the keyboard, moves away from the string and releases the string, causing the string to vibrate and produce sound. I'm starting to do that. This damper is arranged corresponding to each string of each pitch.

Furthermore, in addition to the action mechanism that drives the damper, a damper rod interlocked with the damper pedal is installed across the lower part of the damper lever that acts on the damper, so that when the damper pedal is depressed, all the strings are open the
The string corresponding to the pressed key vibrates and produces a sound, and this vibration causes all released strings to resonate, increasing the playing sound, and
It is constructed in such a way that it produces a rich tone.

A schematic side view of the damper mechanism of the conventional upright piano constructed as described above is shown in FIG.
The damper 3 that presses the is pivotally mounted on the upper end of a damper lever 4, and the damper lever 4 is pivotably pivoted by a damper flange 5 on a center rail 6 that extends across the entire keyboard in common. supported.

On the other hand, the damper rod 7 is rotatably supported on the center rail 6 at a hinge 8 by a damper rod pin 7a, and rests on a cushion 9, and is supported by an uplifting rod 10 (not shown) that responds to depression of the damper pedal. As a result, the damper rod ejecting rod locking piece 7b is ejected, and the damper rod 7 rotates clockwise around the hinge 8 on which the damper rod pin 7a is pivotally supported. 4a and drives all dampers, all strings are in an open state.

In the damper mechanism constructed as described above, the damper rod 7 is divided into a bass damper rod 71 and a sound damper rod 72, as shown in FIG. 2, for each sound range.
And the bass damper rod 71 is the middle pedal 11a.
By stepping on the center thread take-up bolt 14a,
The middle balance 12a and the middle thrusting rod 10a are locked to
drive and operate. At this time, only the dampers for the strings in the bass range are opened. Furthermore, when the right pedal 11b is depressed, the right lever 12b and right lifting rod 10b which are engaged with the connecting plate 13 and the right lever bolt 14c are driven, and the can damper rod 72 is actuated. Drives the intermediate balance 12a and the intermediate protrusion rod 10a that are locked to the connecting plate 13 and the intermediate balance bolt 14b,
The bus damper rod 71 is also operated. Therefore, at this time, the dampers of all strings are opened.

In such a configuration, when the right pedal 11b is depressed, the middle balance 12a and the right balance 12b are driven by the connection plate 13, so although not shown, the respective balances 12a,
In order for the balance spring provided in 12b to work at the same time, the stepping force must be increased, which requires a considerable amount of force, and movements that require such force during performance are a major hindrance. It was hot.

Another method is to use two damper rods on the center rail 6: a first damper rod that drives the damper for the range of the bass string, and a second damper rod that drives all the dampers for the range of the bass string and the range of the can string. However, this method has the disadvantage that two damper rods must be provided within a limited space, making assembly and adjustment difficult.

This idea was made in view of the above-mentioned drawbacks, and includes a bass damper rod that drives the damper in the bass string side, and a can damper rod that drives all the damper rods on the bass string side and the can string side. In the damper mechanism of an upright piano, the can damper rod is engaged with a can damper arm that can be engaged and disengaged from the lower part of the damper lever of each damper on the can string side, and is engaged with the lower part of the damper lever of each damper on the bass string side. It is a hollow round pipe body with a slit part for attaching a removable bus damper arm and a damper arm receiving piece for receiving this bus damper arm, and the bus damper rod is inserted and fitted into the hollow round pipe body of the can damper rod. At the same time, a damper arm is provided through the slit part of the hollow round pipe body, and the damper rod of the hollow round pipe body is driven by the right pedal, and the round bus damper rod is driven by the middle pedal. The present invention is to provide a damper mechanism for an upright piano, which is characterized by being driven, and which improves the above-mentioned drawbacks.

The details of this invention will be explained below with reference to the drawings of the embodiments. In the subsequent figures, in order to avoid complication of explanation, the same components as in FIGS. 1 and 2 are designated by the same reference numerals, and the explanation thereof will be omitted.

3A and 3B are schematic diagrams of essential parts showing one embodiment of a piano damper mechanism according to this invention, and FIG. 4 is a cutaway view taken along the line A--A in FIG. 3A. In the figure, a hollow round pipe body candamper rod 72 is shown.
A slit portion 72c is provided with a can damper arm 72a for driving the damper on the can string side and a protruding rod locking piece 72b, and a bass damper arm 71a for driving the damper on the bass string side.
Further, a receiving piece 72d for receiving the bus damper arm 71a is provided at the lower end of this slit portion 72c.
will be established. Further, the bus damper rod 71 is shaped like a round bar, and is inserted and fitted into the can damper rod 72, and is provided with a bus damper arm 71a that protrudes through the slit portion 72c of the can damper rod 72. A protruding bar locking piece 71b is provided. It is rotatably held at a predetermined position on the back surface of the center rail 6 by a hinge 8.

In this configuration, the bus damper rod 71 is operated by depressing the middle pedal 11a, which includes a middle thread take-up bolt 14a, a middle thread take-up lever 12a, and a middle thrust rod 10a.
As the protruding rod locking piece 71b is pushed up, the bus damper rod 71 rotates within the hollow round pipe of the can damper rod 72, and only the bus damper arm 71a is moved within the slit portion 72c. Activate it to drive the damper mechanism on the bass string side. Also, the Kandamper rod 72 has the right pedal 1.
Right take-up bolt 1 activated by depressing 1b
4b, the right balance 12b, and the uplift rod 10b, the right uplift rod locking piece 72b is pushed up, and the can damper rod 72 rotates, rotating the can damper arm 72a and pushing the bus damper arm 71a. The receiving piece 72d also rotates the bass damper arm 71a, thereby driving the damper mechanisms for all strings.

As explained above, according to the piano damper mechanism according to this invention, the can damper rod is a hollow round pipe body, and the can damper arm for driving the damper on the can string side is provided therein,
A slit part is provided, and the bus damper arm is rotatably driven in this slit part, and a bus damper arm receiving piece is provided below the slit, so that when the can damper rod is operated, all the damper arms rotate. Since it is possible to drive the dampers of all strings by moving, it has a simple structure and does not require a large space, and can be applied without any modification to the conventional damper mechanism, making it even simpler. The structure allows for smooth operation, so there are advantages such as no increase in pedal load.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of the main parts for explaining a conventional damper mechanism, FIG. 2 is a schematic explanatory diagram of the main parts for explaining the pedal part of the conventional damper mechanism, and FIG.
Figure A shows an embodiment of the damper mechanism of this invention. Figure 3B is a schematic explanatory diagram showing the pedal section of the damper mechanism of this invention. Figure 4 shows A--A in Figure 3A.
It is an A-line cutaway view. 1... Hammer, 2... String, 3... Damper,
4... Damper lever, 4a... Damper lever cross, 5... Damper flange, 6... Center rail, 7... Damper rod, 7a... Damper rod pin, 7b... Damper rod projection rod locking piece, 8 ...Hinge, 9...Cushion, 10
a...Medium thrust bar, 10b...Right thrust bar, 11a...
...Middle pedal, 11b... Right pedal, 12... Balance, 13... Connection plate, 14a... Middle balance bolt, 14b... Right balance bolt, 71... Bass damper rod, 72... Can damper rod , is.

Claims (1)

[Scope of Utility Model Registration Claim] A bass damper rod that drives a damper in the bass string side range via a middle balance and a middle thrust rod when the middle pedal is depressed, and a bass damper rod that drives a damper in the bass string side range by pushing the right pedal. In the damper mechanism of an upright piano, the upright piano has a damper rod that drives all the damper rods on the bass string side and the can string side through a raised rod, wherein the can damper rod is a damper of each damper on the can string side. A can damper arm that can be engaged and disengaged below the lever, a slit section for attaching the bass damper arm that can be engaged and disengaged below the damper lever of each damper on the bass string side, and a bass damper arm holder that receives the bass damper arm. The bass damper rod is inserted into and fitted into the hollow round pipe body, and a bass damper arm is provided through the slit portion of the hollow round pipe body. A damper mechanism for an upright piano, characterized in that the can damper rod of the central round pipe body is driven by the right pedal, and the bass damper rod is driven by the middle pedal.