JP2001056680A - Auxiliary pedal device for piano - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary pedal device which allows the sure fixing of a pedal by freely adjusting its height, is light in weight to improve operability and is adequate for carrying. SOLUTION: This auxiliary pedal device has a fixing part 11 which is attachably and detachabley formed to the pedal 2 of a piano, an extension part 15 which is interposed in the upper part from the fixing part 11 from this part and is made regulatable in length by expansion and contraction and a transmission part 18 which is so formed as to receive treadling force by the player's foot by horizontally bending the front end of the extension part 15. The device is directly fixed by the fixing part 11 to the pedal 2, by which the disengagement from the pedal 2 is prevented. In addition, the device is easily portably disposed by removing the fixing part 11 from the pedal 2. Also, the fixing part 11 has a fixing member 12 to be installed atop the pedal 2 and an upper holding plate 13 and lower holding plate 14 for holding this holding member 12 and pedal 2. The upper holding plate 13 and the lower holding plate 14 are so disposed as to be fixed by fastening both sides thereof by means of bolts 14d and butterfly nuts 13b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary pedal device for a piano, and more particularly, to an auxiliary pedal device for a piano used when a player sitting on a chair facing a piano cannot reach the pedal. .

[0002]

2. Description of the Related Art Conventionally, a piano is provided with pedals such as a loud pedal, a sustaining pedal, and a soft pedal. When the pedal is depressed during performance, a well-known pedal effect corresponding thereto is obtained. Is formed. The pedal effect includes, for example, a "loud effect" for sustaining the piano sound, a "sustaining effect" for maintaining the piano sound of a depressed key even after the key is released, and a "soft effect" for softening the piano sound. . In the case of a grand piano, for example, an installation portion such as a pedal box is provided at the bottom of the piano, and the above-mentioned three types of loud pedals, sustaining pedals, and soft pedals are provided so as to protrude from this installation portion. This pedal has a constant height, and is usually installed at a position of about 60 mm from the floor in consideration of ease of operation when an adult plays. For this reason, when an infant plays, there is a problem that the foot cannot reach the pedal and the operation cannot be performed.

Therefore, it is conventionally known to use an auxiliary pedal device for a piano which raises the pedal and enables the operation of the pedal. Such a conventional technique is disclosed, for example, in Japanese Patent Laid-Open No. 10-288273. FIG. 7 is a perspective view showing a conventional auxiliary pedal device for a piano installed on a grand piano as described above. FIG. 8 is a perspective view showing in detail the auxiliary pedal device for a piano shown in FIG. Also, FIG.
FIG. 2 is a diagram showing a state in which the auxiliary pedal device for a piano shown in FIG.

As shown in FIG. 7, a conventional auxiliary pedal device 30 for a piano is formed in a rectangular box shape and its height can be freely adjusted. It was used by being installed on a pedal 2 (loud pedal, sustaining pedal, soft pedal) provided on a main body 1 of a grand piano (FIG. 7). As shown in FIG. 8, a conventional piano auxiliary pedal device 30 has a box-shaped underframe 31 having an open upper portion, and an X-shaped cross leg (not shown) installed in the underframe 31. The jack 38 is provided so that the jack 38 moves up and down, and the footrest plate 32 placed on the jack 38 and adjusted to a predetermined height by the operation of the jack 38 moving up and down. Here, jack 38
Has an adjusting lever 3 for raising and lowering the X-shaped cross leg up and down.
7 are provided. The adjustment lever 37 is formed in such a structure that when rotated in a predetermined direction, an X-shaped cross leg supporting the footrest plate 32 moves up and down.

The foot plate 32 has a pedal box 34 at the top.
The auxiliary pedal 33 protruding from the pedal box 34 is swingably arranged (two places in FIG. 8).
The auxiliary pedal 33 has a transmission member 35 extending downward from the bottom of the foot plate 32 and interlocking therewith.
Section). The transmission member 35 is inserted into the hollow rod 35b extending downward from the bottom of the footrest plate 32, and slides downward by the bias of a spring (not shown). A core rod 35c that extends, an operation lever 35a that operates the extension operation of the core rod 35c, and a contact plate 35d that extends in a thin plate shape at the lower end of the core rod 35c and is installed on the pedal 2 of the piano body 1 It has.

When using the conventional auxiliary pedal device 30 for a piano formed as described above, first, the adjusting lever 37 is used.
Is rotated to the height of the foot plate 32, that is, the auxiliary pedal 33
Adjust the height of the At this time, when the adjusting lever 37 is rotated, the X-shaped cross leg of the jack 38 moves up and down to raise and lower the footrest plate 32 supported. And the auxiliary pedal 33
Is adjusted, the frame 31 is moved so that the contact plate 35d of the transmission member 35 is positioned above the pedal 2 of the piano body 1. Thereafter, by operating the operation lever 35a, the core rod 35c is projected from the inside of the hollow rod 35b by the bias of the spring, and the length of the transmission member 35 is extended.
Thus, the installation operation of the piano auxiliary pedal device 30 is completed when the contact plate 35d contacts the pedal 2 of the piano body 1, as shown in FIG. And the piano body 1
The player 3 is seated on the chair 4 toward the
, The transmission member 35 can be operated to operate the pedal 2 of the piano body 1.

As described above, in the conventional auxiliary pedal device for a piano, the abutting plate 35d of the transmission member 35 formed in a box shape and extending downward is disposed on the pedal 2 of the piano body 1 so that the pedal 2 Is raised so that the player 3 (infant) can operate the pedal 2 of the piano body 1 via the auxiliary pedal 33.

[0008]

However, in the conventional auxiliary pedal device for a piano, as shown in FIG. 9, the abutting plate 35 is installed so as to abut on the pedal 2 of the piano body 1 by urging a spring. Due to this structure, there is a problem that the underframe 31 is displaced by the force of the player 3 depressing the pedal 2, and the contact plate 35d that has contacted the pedal 2 comes off. Further, in the conventional auxiliary pedal device for a piano, as shown in FIG. 8, the auxiliary pedal device is formed in a box shape, has a predetermined size, and has a certain weight such as the jack 38 and the transmission member 35. Performer 3 (infant) because parts are mounted
However, for example, there is a problem that it is difficult to carry and use it at a distant place such as a recital or a contest. In the conventional auxiliary pedal device for a piano, as shown in FIG. 8, since the auxiliary pedal 33 and the contact plate 35d are interlocked through a complicated structure, the pedal 2 of the piano body 1 is operated. However, there is a problem that the player 3 (infant) needs a predetermined force to depress the auxiliary pedal 2.

Further, in the conventional auxiliary pedal device for a piano, as shown in FIG.
Since the height of the pedal box 34 and the transmission member 35 is required by 5d, the height of the jack 38 is limited particularly when it is desired to set the height from the auxiliary pedal 33 to the contact plate 35d extremely low. There was a problem that would occur. It is an object of the present invention to solve the above-described problems and to provide a lightweight, portable and suitable auxiliary pedal device for a piano, which can adjust the height of the pedal freely and securely fix it, thereby improving operability. .

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an auxiliary pedal device for a piano used when a player sitting on a chair facing a piano cannot reach the pedal of the piano. A fixed portion detachably formed on the pedal of the piano, and an extension extending from the fixed portion, interposed between the player's foot and the fixed portion, and extended and contracted to enable length adjustment. A fixed portion, an extended portion, and a transmission portion directly fixed to the pedal, the transmission portion including an existing portion and a bent portion formed by receiving a depressing force of a player's foot by bending a tip of the extended portion. To prevent detachment from the pedal, and to provide a portable portion easily by removing the fixing portion from the pedal.

Here, it is preferable to use the auxiliary pedal device for a piano in combination with a footrest whose height is fixed or adjustable. Further, it is preferable that the fixing portion is disposed on the upper surface of the pedal and is pinched together with the pedal by two holding plates, and both sides of the holding plate are preferably fastened and fixed by bolts and nuts. Also. As another embodiment of the fixing portion, a recess is provided to cover the periphery of the pedal, the recess is mounted on the pedal, and at least one bolt is fastened to the outside toward the inside of the recess. It is preferable to fix the inner pedal by applying a pressing force.

Further, the extending portion is formed by overlapping a first plate member extending upward from the fixed portion and a second plate member extending downward from the transmitting portion, and penetrates the overlapping surface. It is preferable to form a through-hole and fix it with bolts and nuts. In the extending portion, a plurality of through holes are formed in the first plate member and the second plate member at predetermined intervals in the extending direction, and the first plate member and the second plate member are formed in the extending direction. It is preferable to provide such that it can be expanded and contracted by sliding to change the fixing position of the bolt in the through hole. In addition, the extension portion
It is preferable that the pedal is provided so as to be able to expand and contract approximately from 4 cm to 21 cm from the bottom to the top.

Further, it is preferable that a soft member made of a soft material such as rubber, felt, soft resin, sponge or the like is disposed on a contact surface of the fixing portion which is in contact with the pedal to prevent the pedal from being damaged. Further, the fixing portion is attached to a keyboard instrument having a plurality of pedals for adjusting sounds, such as a grand piano, an upright piano, and an electronic piano, and it is preferable to attach and use at least one or more of the plurality of pedals. .

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an auxiliary pedal device for a piano according to the present invention. FIG. 1 is a perspective view showing an embodiment in which a piano auxiliary pedal device according to the present invention is mounted on a grand piano. FIG. 2 is an exploded perspective view showing details of the auxiliary pedal device for a piano shown in FIG. FIG. 3 is a side view showing a state where the auxiliary pedal device for a piano shown in FIG. 2 is mounted on a pedal of the piano. FIG. 4 is similar to FIG.
FIG. 4 is a diagram showing a state in which the auxiliary pedal device for a piano shown in FIG.

As shown in FIG. 1, an embodiment of an auxiliary pedal device for a piano according to the present invention includes a loud pedal 2c, a sustaining pedal 2b, and a soft pedal 2a provided on a main body 1 of a piano (a grand piano in FIG. 1). Directly attached to pedal 2 consisting of (attached to loud pedal 2c in FIG. 1)
It is installed by doing. The auxiliary pedal device 10 for a piano includes a fixed portion 11 that is directly mounted on the pedal 2 of the piano body 1, and an extended portion 15 that extends upward from the fixed portion 11 and expands and contracts to enable length adjustment. And a transmission portion 18 that bends at a substantially right angle from the tip of the extension portion 15 and extends.

As shown in FIG. 2, the auxiliary pedal device 10 for a piano has a fixing member 12 which is formed in a rectangular box shape on a fixing portion 11, and holds the fixing member 12 and the pedal 2 from both upper and lower sides. An upper holding plate 13 and a lower holding plate 14 are provided. Here, a soft member 12 a made of a soft material such as rubber, felt, soft resin, or sponge is attached to the surface of the fixing member 12 that comes into contact with the pedal 2. Similarly to the fixing member 12, the lower holding plate 14 is provided with a soft member 14a made of a soft material on a surface that comes into contact with the pedal 2. The lower holding plate 14 is provided with an opening A which is opened on both sides of the soft member 14a, and a bolt 14d is inserted into the opening A through a washer 14c. The bolt 14d is fixed to the lower holding plate 14 by inserting and fastening a nut 14b from the tip.

The upper holding plate 13 is fixed to the upper portion of the fixing member 12 by screws 13c, and has an opening B on each side for inserting a bolt 14d fixed to the lower holding plate 14. Then, a bolt 14d fixed to the lower holding plate 14 is inserted into the opening B and fastened by the wing nut 13b via the washer 13a to the upper holding plate 13 fixed to the fixing member 12, thereby fastening the lower holding plate 14 to the lower holding plate 14. I support. Therefore, the fixing portion 11 is attached to the fixing member 12 by the upper holding plate 1.
3 is fixed, and the upper holding plate 13 is used with the lower holding plate 14 supported.

The fixed member 12 on which the upper holding plate 13 and the lower holding plate 14 are mounted has an extending portion 15 extending upward.
And a transmission section 18 that bends at a substantially right angle from the tip of the extension section 15 and extends. Here, the extension 15
Is constituted by an L-shaped first plate member 17 screwed to the fixing member 12 and an L-shaped second plate member 16 screwed to the transmission portion 18. And the first plate member 1
7, a plurality of circular through-holes C are formed in a surface extending upward from the fixing member 12. In the second plate member 16, a plurality of elongated through holes D are formed in a surface extending downward from the transmission portion 18. Therefore, as shown in FIG. 2, the first plate member 17 and the second plate member 16 are aligned with the through holes C and D formed on the surface thereof, and
a is inserted and fastened by the nut 17a, thereby connecting and fixing each other. At this time, the length of the extending portion 15 composed of the first plate member 17 and the second plate member 16 is
The position can be freely adjusted by shifting and fixing the positions of the through holes C and D into which the a is inserted. Here, the extension 15
Since the elongated through-hole D is provided on the surface of the second plate member 16, it is possible to finely adjust the extending length by sliding the second plate member 16 in the length direction of the through-hole D. it can. The nut 17a to be fastened to the bolt 16a is
Like the wing nut 13b shown in FIG. 2, it may be formed in a wing nut shape so that it can be freely removed and its length can be easily adjusted.

When using the auxiliary pedal device for a piano according to the present invention having such a configuration, first, the fixing member 1 is used.
Fixed part 1 with upper holding plate 13 and lower holding plate 14 mounted on 2
1 is attached to the pedal 2. At this time, the pedal 2 includes the soft member 12a of the fixing member 12 and the soft member 14a of the lower holding plate 14.
a, and is clamped by the wing nut 13b, whereby the holding force of the upper holding plate 13 and the lower holding plate 14 is applied and fixed. Here, the fixing member 12 and the lower holding plate 1
The soft members 12a and 14a prevent the fixed portion 11 from being easily detached from the pedal 2 due to the pinching force. Then, the through-hole C of the first plate member 17 and the second
The through-hole D of the plate member 16 is aligned with a predetermined length, and is fastened and fixed with a bolt 16a and a nut 17a. At this time, by forming the nut 17a into a wing nut shape as described above, the nut 17a can be freely removed and its length can be easily adjusted.

When the auxiliary pedal device 10 for a piano is mounted on the pedal 2 in this manner, as shown in FIG. 3, the height from the bottom of the pedal 2 to the upper portion of the transmission portion 18 is increased to the maximum height E.
To a minimum height F.
Here, it is preferable that the maximum height E from the pedal 2 is set to about 21 cm, and the minimum height F is set to about 4 to 5 cm. At this time, the minimum height F of the pedal 2 can be adjusted by stepping on the transmission unit 18 and lowering the position of the transmission unit 18 until the lower end of the second plate member 16 does not contact the floor.

Further, the auxiliary pedal device 10 for a piano according to the present invention thus formed is used in combination with a footrest 5 as shown in FIG. Although not shown, the footrest 5 can be adjusted in height, and is formed to be lighter than the prior art shown in FIG. The auxiliary pedal device 10 for a piano is configured such that the player 3 sits on the chair 4 toward the main body 1 of the piano, places his / her feet on the footrest 5 as shown in FIG. 18
, And transmitted to the fixed portion 11 via the extending portion 15 so that the pedal 2 of the main body 1 can be operated in conjunction therewith. At this time, it is preferable that the footrest 5 is installed at a position where the transmission unit 18 does not come into contact with the inclination of the pedal 2 when the player 3 steps on the auxiliary pedal device 10 for a piano. Further, the footrest 5 is not limited to a height-adjustable one, and may be, for example, a simple table made of box-shaped wood.

According to the embodiment of the auxiliary pedal device for a piano according to the present invention, the pedal 2 of the piano body 1 is used.
The structure in which the fixing portion 11 is directly fixed can prevent the problem that the piano auxiliary pedal device 10 comes off due to the force of the player depressing the pedal as in the prior art shown in FIG. In addition, the embodiment of the auxiliary pedal device for a piano according to the present invention includes a fixing portion 11 and an extending portion 1.
5. Because it has a lightweight structure consisting of the transmission section 18,
For example, a performer (infant) can easily carry it to a distant place such as a presentation or a contest. Also,
Since the footrest 5 is similarly formed to be lightweight, it can be carried more easily with the auxiliary pedal device 10 for a piano as compared with the prior art shown in FIG.

Further, since the auxiliary pedal device 10 for a piano is fixed to the pedal 2 and its own weight is directly applied to the pedal 2, the pedal 2 requires less force than the prior art shown in FIG.
Can be depressed, and the pedal 2 can be easily depressed for an infant or a young person. Further, the height from the bottom surface of the pedal 2 to the upper portion of the transmission portion 18 is changed from the maximum height E (about 21 cm) shown in FIG.
About 5cm) can be adjusted step by step,
Infants 2-3 years old who could not reach their feet using the prior art devices and the upper grades of elementary school students who need the minimum height can be used, and the age (height) of the performer can be widened.

Here, in the embodiment of the auxiliary pedal device for a piano according to the present invention, the fixing portion 11 is connected to the upper holding plate 13.
Although the embodiment in which the pedal and the fixing member 12 are held by the lower holding plate 14 has been described, the present invention is not limited to this. For example, the holding member may be formed in a concave fixing portion that is inserted into the pedal 2 and fixed. Is also possible. FIG. 5 is a perspective view showing another embodiment of the auxiliary pedal device for a piano according to the present invention including the concave fixing portion 21 inserted and fixed to the pedal 2 as described above. FIG. 6 shows the G-
It is sectional drawing which shows the cross section of G line.

As shown in FIG. 5, another embodiment of the auxiliary pedal device for a piano according to the present invention is similar to the auxiliary pedal device for a piano shown in FIG. Extension portion 2 extending upward from fixing portion 21
5 and a transmission portion 28 which is bent at a substantially right angle at the leading end of the extension portion 25 and extends. Here, the extending portion 25 is a first plate member 27 extending upward from the fixing portion 21.
And a plurality of circular through holes I are formed in the surface of the first plate member 27. Further, the first plate member 27 is provided with a second plate member 26 which is fastened by bolts and nuts and further extends upward. This second plate member 26
Is mounted with a transmission section 28 whose tip is bent at a substantially right angle and extends in the horizontal direction. In the second plate member 26, a plurality of elongated through holes H are formed in a surface extending upward from the first plate member 27. Therefore, the first plate member 27 and the second plate member 28 are connected to each other by fastening the through holes H and I formed on the surface with bolts and nuts in the same manner as the piano auxiliary pedal device shown in FIG. Are connected and fixed. At this time, the length of the extending portion 25 composed of the first plate member 27 and the second plate member 28 can be freely adjusted by shifting and fixing the positions of the through holes H and I into which the bolts are inserted. .

The fixing portion 21 is different from the auxiliary pedal device for a piano shown in FIG. 2 in that a concave side surface is opened and the inside is formed in a cavity, and the soft member 24 is fixed inside the cavity. A plate 22 is provided. And the fixing part 2
1 is formed so as to form a screw hole J opening substantially at the center of the upper surface so that the thumb screw 23 can be fastened. It is preferable that at least one or more screw holes J are provided in the fixing portion 21.

When another embodiment of the auxiliary pedal device for a piano according to the present invention having such a configuration is used,
First, as shown in FIG. 5, the opening that opens on the side surface of the fixing portion 21 is inserted into the pedal 2. At this time, the pedal 2
As shown in FIG. 6, it is inserted between the fixing plate 22 and the soft member 24, and is fixed in the fixing portion 21 by applying a pressing force via the fixing plate 22 by fastening the thumb screw 23 from above. You. Thereafter, as in the auxiliary pedal device for a piano shown in FIG. 4, the player 3 sits on the chair 4 toward the body 1 of the piano, puts his foot on the footrest, and steps on the transmission unit 28, thereby transmitting the transmission unit 28. And transmitted to the fixing portion 21 via the extending portion 25, and the pedal 2 of the main body 1 can be operated in conjunction therewith.

As described above, according to another embodiment of the auxiliary pedal device for a piano according to the present invention, since it is provided with a structure to be directly mounted on the pedal 2, the same as the auxiliary pedal device for a piano shown in FIG. The effect can be obtained, and by forming the fixing portion 22 into a concave shape to be inserted into the pedal 2, the number of components of the fixing portion 22 can be reduced, and it can be more easily carried. As described above, the embodiment of the auxiliary pedal device for a piano according to the present invention has been described in detail. However, the present invention is not limited to the above-described embodiment, and can be changed without departing from the gist thereof.

For example, the embodiment in which the auxiliary pedal device for a piano according to the present invention is applied to a grand piano has been described. However, the present invention is not limited to this. The present invention can be applied to a keyboard instrument having a plurality of keyboard instruments. In addition, the auxiliary pedal device for a piano according to the present invention is connected to one pedal (FIG. 1).
Although the embodiment mounted on the loud pedal 2c) shown in FIG. 1 has been described, the present invention is not limited to this.
It is also possible to mount at three or more locations, or more.

[0030]

As described above, according to the auxiliary pedal device for a piano of the present invention, since the fixing portion is directly fixed to the pedal of the piano, the auxiliary pedal device for the piano is disengaged by the force on which the player steps on the pedal. It is possible to prevent such a problem that the data is lost. Further, since the embodiment of the auxiliary pedal device for a piano according to the present invention has a lightweight structure including the fixing portion, the extending portion, and the transmitting portion, the player (infant) can easily move to a remote place. It becomes possible to carry. Similarly, since the footrest is also made lightweight, it can be more easily carried with the auxiliary pedal device for a piano than in the prior art. Further, since the weight of the pedal is directly applied to the pedal by the structure in which the fixing part is fixed to the pedal, the pedal can be depressed with a small force, and the player can easily depress the pedal. Furthermore, since the height from the bottom of the pedal to the upper part of the transmission part can be freely adjusted in a stepwise manner, a 2-3 year old infant who could not reach the foot using the conventional device and a minimum Higher grades of elementary school students who require height can be used, and the age (height) range of the performer is expanded.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment in which a piano auxiliary pedal device according to the present invention is mounted on a grand piano.

FIG. 2 is an exploded perspective view showing details of an auxiliary pedal device for a piano shown in FIG. 1;

3 is a side view showing a state in which the auxiliary pedal device for a piano shown in FIG. 2 is mounted on a pedal of the piano.

FIG. 4 is a diagram showing a state in which the piano auxiliary pedal device shown in FIG. 1 is used.

FIG. 5 is a perspective view showing another embodiment of the auxiliary pedal device for a piano according to the present invention.

FIG. 6 is a sectional view showing a section taken along line GG shown in FIG. 5;

FIG. 7 is a perspective view showing a conventional auxiliary pedal device for a piano.

FIG. 8 is a perspective view showing in detail the auxiliary pedal device for a piano shown in FIG. 7;

FIG. 9 is a view showing a state in which the auxiliary pedal device for a piano shown in FIG. 7 is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Pedal 3 Player 4 Chair 5 Footrest 10 Auxiliary pedal device for piano 11 Fixing part 12 Fixing member 12a Soft member 13 Upper holding plate 13a Washer 13b Wing nut 14 Lower holding plate 14a Soft member 14b Nut 14c Washer 14d Bolt 15 Extension portion 16 Second plate member 16a Bolt 17 First plate member 17a Nut 18 Transmission portion

Claims (9)

[Claims] An auxiliary pedal device for a piano used when a player's feet sitting on a chair facing a piano does not reach a pedal of the piano, wherein the fixing portion is detachably formed on the pedal of the piano. An extending portion extending from the fixed portion, interposed between the player's foot and the fixed portion, and extended and contracted to enable length adjustment; and a tip of the extending portion is bent. A transmission portion formed so as to receive a depressing force of the player's foot, wherein the fixing portion, the extension portion, and the transmission portion are directly fixed to the pedal to prevent detachment from the pedal, and An auxiliary pedal device for a piano, wherein the auxiliary portion is easily portable by removing the fixing portion from the pedal. 2. The piano auxiliary pedal device according to claim 1, wherein the piano auxiliary pedal device is used in combination with a footrest whose height is fixed or adjustable. Auxiliary pedal device. 3. The auxiliary pedal device for a piano according to claim 1, wherein the fixing portion is disposed on an upper surface of the pedal and is held together with the pedal by two holding plates, and bolts are provided on both sides of the holding plate. And an auxiliary pedal device for a piano, wherein the auxiliary pedal device is fastened and fixed with a nut. 4. The auxiliary pedal device for a piano according to claim 1, wherein the fixing portion includes a concave portion that is mounted so as to cover the periphery of the pedal, and the concave portion is mounted on the pedal and has at least one outer portion. An auxiliary pedal device for a piano, wherein one or more bolts are fastened toward the inside of the concave portion and fixed by applying a pressing force to the pedal in the concave portion. 5. The auxiliary pedal device for a piano according to claim 1, wherein the extending portion is a first plate member extending upward from the fixing portion and a second plate extending downward from the transmitting portion. An auxiliary pedal device for a piano, wherein members are formed so as to overlap with each other, and a through hole penetrating through the overlapping surface is formed and fixed with bolts and nuts. 6. The auxiliary pedal device for a piano according to claim 5, wherein the extending portion has a plurality of the through holes in the first plate member and the second plate member at predetermined intervals in the extending direction. And a first plate member and a second plate member which are slidable in the extending direction to change the fixing position of the bolt in the through hole so as to expand and contract. Pedal device. 7. The auxiliary pedal device for a piano according to claim 1, wherein the extension portion is approximately 4 cm above a bottom surface of the pedal.
An auxiliary pedal device for a piano, wherein the auxiliary pedal device is provided so as to be able to expand and contract between 21 cm and 21 cm. 8. The auxiliary pedal device for a piano according to claim 1, wherein the fixing portion has a contact surface that comes into contact with the pedal, and a soft member made of a soft material such as rubber, felt, soft resin, or sponge. And an auxiliary pedal device for a piano, wherein the pedal is prevented from being damaged. 9. The auxiliary pedal device for a piano according to claim 1, wherein the fixing portion is a grand piano, an upright piano,
An auxiliary pedal device for a piano, which is attached to a keyboard instrument having a plurality of pedals for adjusting sounds, such as an electronic piano, and is used by attaching at least one or more to the plurality of pedals.