JPS5913649Y2 - Pedal devices for pianos, etc. - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pedal device for a piano or the like that can maintain an actuated body such as a muffler in its operating state, such as a muffler pedal in an upright piano.

For example, the muffler mechanism built into an upright piano is such that when the muffler pedal is depressed, the muffler hangs between the hammer and the strings, and the hammer hits the strings through the muffler, thereby reducing the volume of the piano playing. It is made to reduce it appropriately.

By the way, for example, when trying to play the piano at home, due to problems with housing, etc., one may be forced to play at a low tone. Unlike other damper pedals and soft pedals, the muffler pedal is not operated during the performance, but is normally operated before the performance to keep the muffler in operation.

Conventionally, as shown in FIG. 1, such a muffler pedal device includes a pedal metal 2 which is rotatably placed on a predetermined position on the upper surface of a bottom plate 1 and is rotatable about a vertical axis (not shown). 3 is pivotally supported, and this pedal 3
The other end is passed through a two-stage pedal window 5 provided at a predetermined position on the front base 4 to appropriately protrude to the front side of the front upper base 4, and the pedal 3 is moved by the force of the return spring 6. There is known a muffler (not shown) configured to hold a muffler (not shown) in an operating state by pushing the muffler against it, moving it laterally and holding it in the depressed state.

However, such a muffler pedal device requires a two-step operation of moving the pedal 3 in the vertical and horizontal directions to maintain the muffler in the operating state or to release the muffler from this state. In addition, although the pedal window 5 has a two-stage structure and the pedal 3 is positioned on either side thereof, there is a drawback that the appearance of the piano is inferior.

This invention was made in view of the above circumstances, and provides a pedal device for pianos, etc., which can hold the actuated body in an actuated state and release it with a simple operation, and which has a comparable appearance. The object of the present invention is to enable the actuated body to be held in the actuated state and released by simply stepping on the pedal.

An embodiment of this invention will be described below with reference to FIGS. 2 to 7.

In the figure, reference numeral 10 denotes a pedal, whose approximately central portion is attached to a pedal metal 12 placed at a predetermined position on the upper surface of the bottom plate 11 so as to be swingable in the vertical direction, and one end thereof is provided at a predetermined position on the front upper stand 13. It passes through a rectangular pedal window 14 and protrudes appropriately to the front side of the front upper stand 13.

One end of the pedal 10 is urged upward by a spring 15, and is normally held in contact with the upper wall of the pedal window 14, as shown in FIG.

An operating rod 20 is connected to the pedal 10 via a connecting rod 16, a lever 17, a connecting rod 18, and a lever 19.

The actuating rod 20 is inserted into a hole 22 of a guide member 21 attached to a main plate (not shown) of the piano so as to be vertically slidable and slightly swingable.
is forced upward by.

When the pedal 10 is depressed, the actuating rod 20 descends against the force of the spring 23, and on the other hand, when the pedal 10 returns to the non-operating position from this state, it rises due to the force of the spring 23. and returns to its original position.

Note that a claw 24 is provided at a predetermined location on the actuating rod 20.
is installed protrudingly.

This claw 24 has an R portion 25 at its tip end.

A shaft 26 is implanted at a predetermined location on the parent plate.

A rotating plate 27 consisting of a disc is attached to this shaft 26 as shown by arrows A and B.
It is attached so that it can rotate in any direction.

A retaining notch 28 is formed at a predetermined location on the peripheral edge of the rotary plate 27 .

Furthermore, first and second pins 29 and 30 are implanted at two predetermined locations on the peripheral edge of one side of the rotating plate 27, respectively.

Note that the first pin 29 is located at a position spaced apart from the notch 28 by an angle θ1 (approximately 50° in this embodiment) in the direction of arrow A.

Further, the second pin 30 is located at an angle o2 (approximately 90° in this embodiment) away from the first pin 29 in the direction of arrow A.

A shaft 31 is installed at a predetermined location on the main plate below the rotating plate 27.

A stopper 32 is rotatably attached to this shaft 31.

The stopper 32 is brought into contact with the circumferential surface of the rotating plate 27 by the force of a spring 33 so as to allow the rotating plate 27 to rotate in the direction of arrow A, and as will be described later. When the rotary plate 27 is engaged with the notch 28 of the rotary plate 27, the rotary plate 27 is prevented from rotating in the direction of arrow A.

A shaft 34 is implanted at a predetermined location on the other side of the rotary plate 27 and spaced a predetermined distance from the center of rotation of the rotary plate 27 .

The lower end of an actuating rod 35 is rotatably attached to this shaft 34, and the upper end of this actuating rod 35 is connected to a muffler structure 36 of known construction.

Note that the operating rod 35 is always urged upward by the force of the spring 37 for returning the muffler component 36 to the non-operating position.

Note that the state shown in FIGS. 2 and 4 is that of the muffler component 3.
6 is in the inoperative position, and in this state,
The pedal 10 is in the non-operating position, and the actuating rod 35 is at its lifting limit, with its shaft 34 located vertically above the center of rotation of the rotating plate 27, that is, the shaft 26, and accordingly, the rotating plate 27
The first pin 29 is located below the tip of the claw 24 of the actuating rod 20.

When the pedal 10 is depressed from this state, the actuating rod 20 descends against the force of the spring 23 and pushes down the first pin 29 with its pawl 24, which causes the rotary plate 27 to move in the direction of arrow B at an angle α, i.e. Rotated more than 90 degrees,
As shown in FIG. 5, the second pin 30 reaches a position moved in the direction of arrow B from the position where the first pin 29 was in FIG. 4, and the notch 28 corresponds to the stopper 32. When the stopper 32 reaches this position, the stopper 32 is rotated clockwise in FIG. 4 by the force of the spring 33 and enters the notch 28.

Further, following the rotation of the rotation plate 27 in the direction of arrow B, the shaft 3
4 is moved in the same direction and at the same angle, the actuating rod 35
is lowered against the force of the spring 37 and becomes appropriately inclined as shown in FIG.

Next, when the pedal 10 is stopped from being depressed in this state, the pedal 10 is returned to its original non-operating position by the force of the spring 15, and the actuating rod 20 is moved by the spring 23.
The claw 24 is lifted by the force, and the pressure on the first pin 29 is released. When the stopper 32 is rotated and engaged with the retaining portion 28 in a predetermined manner, the second pin 30 is locked at the position shown in FIG.
reaches the position where the pin 29 was.

Further, the actuating rod 20 that is raised by the spring 23 pulls away while the R portion 25 of the claw 24 slides into contact with the second pin 30 during its ascent, so that the lever 19
The pawl 24 rotates clockwise in FIG. 5 using the connecting portion as a fulcrum, and when the pawl 24 passes over the second pin 30, it rotates in the opposite direction and returns to the original non-operating position as shown in FIG. 6. reach.

Next, when the pedal 10 is depressed again from this state, the actuating rod 20 descends and the second pin 3 is moved by its pawl 24.
0 is pushed down, thereby rotating the rotating plate 27 in the direction of arrow B.

At this time, the stopper 32 is pushed by the circumferential surface of the rotating plate 27 and is rotated counterclockwise in FIG. 6 against the force of the spring 33 to return to its original state.

Then, following the rotation of the rotation plate 27 in the direction of arrow B, the shaft 34 moves in the same direction and moves 18 degrees from the initial position shown in FIG.
When the rotating plate 27 is moved by 0° or more, the force of the spring 37 urging the operating rod 35 upward causes the rotating plate 27 to rotate in the direction of arrow B and return to its original position as shown in FIG. At the same time, the actuating rod 35 also returns to its original position.

Next, when the pedal 10 is stopped from being depressed in this state, the pedal 10 is returned to its original non-operating position by the force of the spring 15, and the actuating rod 20 is moved by the spring 23.
is raised by the force of

Note that the actuating rod 20, which is raised by the force of the spring 23 in this manner, escapes while the R portion 25 of the claw 24 comes into sliding contact with the first pin 29 during its ascent, as in the case described above. It rotates clockwise in FIG. 7 using the connecting portion with the lever 19 as a fulcrum, and when the pawl 24 gets over the first pin 29, it rotates in the opposite direction to reach its original non-operating position.

Thus, all elements return to their original state.

In this way, when the pedal 10 in the non-operating position is depressed and the pedal 10 is stopped, the rotating plate 27, which is in the state shown in FIG. Accordingly, the operating rod 35 moves down from the state shown in FIG. 4 to the state shown in FIG. 6, thereby bringing the muffler component 36 to the operating position.

When the pedal 10 is depressed again from this state and the pedal operation is stopped, the rotating plate 27 in the state shown in FIG. 6 rotates in the direction of arrow B and returns to the original state shown in FIG. 4. Accordingly, the operating rod 35 further descends by a predetermined amount from the state shown in FIG. 6, and then rises to return to the original state shown in FIG. 4, thereby bringing the muffler component 36 to the non-operating position. It is something that makes you

In the above embodiment, the claw 24 for rotating the rotating plate 27 is integrally formed on the actuating rod 20, but the invention is not limited to this, and for example, as shown in FIG.
and the actuating rod 20 are separated, and the pawl 24 is attached to the actuating rod 20.
It may be configured such that it is rotatably attached via a hinge 40 and biased clockwise in the figure by a spring 41 to normally position it in the state shown in the figure.

Further, other configurations may be changed in various ways without departing from the gist of the invention.

As described above, according to the pedal device for a piano or the like according to this invention, the first up and down movement of the pedal causes the rotating plate to rotate by an angle β in a predetermined direction from the initial position, and in conjunction with this, one end is rotated as described above. An actuating rod rotatably attached to a predetermined eccentric position on the moving plate is brought from an inoperative position to an actuating position, and thereafter, by another up and down movement of the pedal, the rotating plate and the actuating rod are moved together. Since it is configured to return to its original state, simply pressing the pedal causes the actuating rod (
In other words, it is possible to hold the actuated body (actuated body) in the actuated state and also to release the actuated state, making it easy to operate the pedal, and since the pedal window can be a simple rectangular shape, the appearance is comparable to that of a piano etc. It has the following effects.

[Brief explanation of drawings]

Fig. 1 is a partial perspective view showing an example of a conventional piano pedal device, Fig. 2 is a perspective view of a main part showing an embodiment of the piano pedal device according to this invention, and Fig. 3 is a partial perspective view showing an example of a conventional piano pedal device. FIGS. 4 to 7 are perspective views similar to those shown in the figure, and FIGS. 4 to 7 are views for explaining the operation, and FIG. 8 is a view showing another embodiment of this invention. 10... Pedal, 11... Bottom plate, 13... Front base, 14... Pedal window, 20... Operating rod, 24...
Claw, 27... Rotating plate, 28... Notch, 29.30
...pin, 32...stopper, 35...operating rod,
36...Muffler component.

Claims (1)

[Scope of utility model registration request] A pedal disposed to be swingable in the vertical direction, a rotating plate disposed to be rotatable about a predetermined point, and when the pedal is depressed, the pedal operates to rotate the rotating plate. A predetermined angle α in a predetermined direction (however, 90°〈α＜
means for rotating the rotating plate (180°); β≦α) a means for preventing the rotating plate from rotating in the opposite direction when the rotating plate is rotated; an operating rod that moves from a non-operating position to an operating position by following the rotation of the plate by the angle β in a predetermined direction from an initial position;
a biasing member that biases the actuating rod toward the non-actuating position, and after the rotary plate is rotated by the angle β from the initial position in a predetermined direction, the pedal is rotated again. 1. A pedal device for a piano or the like, characterized in that, when stepped on, the rotary plate is rotated in a predetermined direction and returned to an initial position by the biasing member.