JPH096328A - Support structure for action assembly - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object to provide a function of a support structure pedal of an action assembly that can prevent adjustment of piano action due to environmental humidity and the like and that can be easily attached. [Structure] An action assembly 11 including a horizontally arranged center rail 10 and a large number of piano actions 9 fixed to the center rail 10 is attached to a support 1
It is supported and fixed to the frame 8 via 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure of an upright piano for supporting an action assembly consisting of a center rail and a number of piano actions inside the piano.

[0002]

2. Description of the Related Art FIG. 3 shows a sectional structure of a conventional upright piano. As shown in the figure, at the innermost part of the keyboard 51, the action mechanism 52 and the hammer 5 are provided above the keyboard 51.
A piano action 55 consisting of 3 and a damper 54 is provided. A large number of piano actions 55 are arranged side by side in correspondence with the keyboard 51, and these are fixed to a horizontally extending center rail 56, which constitutes an action assembly 57 as a whole. The center rail 56 is supported by several action brackets 58 arranged at appropriate intervals. The action bracket 58 is attached to the frame 60 via the action bolts 59 at the upper portion and the action base 61 at the lower portion. It is attached to the shelf board 62 via the. In this case, the action assembly 57 is slightly moved in the front-rear direction by the action bolt 59, and is also vertically moved by the adjustment bolt (not shown) of the action base 61.
As a result, the piano action 55 is adjusted (tuned).

[0003]

As described above, in the conventional support structure of the action assembly 57, the action assembly 57 is mainly supported by the shelf plate 62, and the shelf plate 62 is warped due to environmental humidity or the like. When the discrepancy occurs, there is a problem that the adjustment of each piano action 55 is wrong. Also, the action assembly 57
However, since it is attached to the frame 60 and the shelf plate 62, there is a problem that the adjustment work after attachment of the action assembly 57 becomes complicated unless the both are attached accurately. Further, the action assembly 57 cannot be attached until after the shelf board 62 is assembled, and there is a problem that the assembly procedure is restricted.

The present invention has been made in order to solve such a problem, and it is possible to prevent the adjustment of the piano action due to environmental humidity and the like, and to support the action assembly support structure easily. The purpose is to provide.

[0005]

In order to achieve the above object, a supporting structure of an action assembly of the present invention comprises an action assembly comprising a horizontally arranged center rail and a large number of piano actions fixed to the center rail. It is characterized in that it is supported and fixed to the frame through a support tool.

[0006]

According to the support structure of the action assembly of claim 1, since the action assembly is attached to the frame through the support, that is, the action assembly is affected by environmental humidity unlike the shelf board. Since it is attached only to the difficult frame, the accuracy of the attachment is easy to obtain, and the adjustment of the piano action is unlikely to occur. Further, the action assembly can be attached after the frame is assembled regardless of the assembling of the shelf board.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A support structure for an action assembly according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a vertical sectional view of the upper half of an upright piano. As shown in the figure, in this upright piano 1, a keyboard 3 is placed on a shelf board 2, and an action mechanism 4 is arranged above the innermost portion of the keyboard 3. A hammer 5 is arranged above the action mechanism 4, and a damper 6 is arranged behind the hammer 5. The damper 6 is in contact with the string 7, and the string 7 is stretched on the surface of the frame 8. The action mechanism 4, the hammer 5 and the damper 6 constitute a piano action 9.

A large number of piano actions 9 are arranged side by side in correspondence with the keyboard 3, and they are fixed to a center rail 10 extending horizontally in the width direction of the upright piano 1. An action assembly 11 is configured by the center rail 10 and the center rail 10. Further, the center rail 10 is provided with action brackets (supporting tools) 12 arranged at three positions on both sides and the middle of the upright piano 1 in the width direction,
It is attached to the frame 8.

FIG. 2 shows a state in which each of the action brackets 12 is attached to the frame 8. The action bracket 12 has two portions, that is, an upper end portion and a lower end portion, of the frame 8.
Attached to. The action bracket 12 is
It is formed by press-forming a steel plate or the like, and has a bracket body 21 in a U-shape, an upper mounting piece 22 obtained by bending a side portion of an upper end of the bracket body 21 at a right angle, and an intermediate portion of the bracket body 21 at a right angle. Rail mounting piece 23 bent
And a lower mounting piece 24 in which the lower end of the bracket body 21 is horizontally bent, and the upper mounting piece 22 is attached to the frame 8
The upper adjusting bolt 25 attached to the frame 8 and the lower adjusting bolt 26 attaching the lower attaching piece 24 to the frame 8 are provided.
Further, the center rail 10 is arranged inside the bracket main body 21 and is screwed to the rail mounting piece 23 by two fixing screws 27, 27.

The upper adjusting bolt 25 comprises a mounting bolt 31 and a nut 32 arranged on the frame 8 side.
The mounting bolt 31 has a special shape and is composed of a head portion 31a which is an operating portion, an engaging portion 31b which engages with the upper mounting piece 22 and a shaft portion 31c which is formed with a male screw. There is. The engaging portion 31b has a long hole 2 formed in the upper mounting piece 22.
It engages with 2a so as to be movable in the up-down direction in a state where it is not pulled out. Further, a nut 32 is screwed to a shaft portion 31c whose tip portion is screwed to the frame 8. By tightening the nut 32 on the frame 8 side, the mounting bolt 31
It is designed to stop the rotation. In this case, by rotating the mounting bolt 31 forward or backward, the engaging portion 31
The action bracket 12 slightly moves in the front-rear direction about the lower adjustment bolt 25 via b. As a result, the piano action 9 is adjusted (adjusted) in the front-rear direction.

On the other hand, the lower adjusting bolt 26 has a top portion 26a formed in a spherical crown shape, and engages with a groove portion 24a of a lower mounting piece 24 formed in a complementary shape. The tip portion of the shaft portion 26b of the lower adjustment bolt 26 is screwed into the frame 8, and in this state, the action bracket 12 is slightly moved in the vertical direction by operating the lower adjustment bolt 26 in the forward and reverse directions. As a result, the vertical adjustment (adjustment) of the piano action 9 is performed.

As described above, the action assembly 1
1 is supported and fixed to the frame 8 at two places, upper and lower,
The action assembly 11 can be assembled without being affected by the shelf plate 2 as compared with the conventional one that is supported and fixed to the shelf plate 2 and the frame 8. That is,
First, since the action assembly 11 can be attached to the frame 8 that is not easily affected by environmental humidity, it is possible to prevent the piano action 9 from being misaligned. Secondly, since the action assembly 11 can be attached to the single member (frame 8), it can be attached easily and accurately.
Thirdly, if the frame 8 is assembled, whether before or after the shelf plate 2 is assembled, select the procedure that is most easy to assemble and assemble the action assembly 11. You can

The present invention can be applied to an electric upright piano as well as an acoustic upright piano. Further, the structure of the action bracket and the structure of the adjustment (adjustment) mechanism may be any structure as long as the action assembly can be supported and fixed to the frame and can be adjusted in the front-rear direction and the vertical direction with respect to the frame, and are not limited to the above embodiments. Not something.

[0014]

As described above, according to the supporting structure of the action assembly of the present invention, it is possible to prevent the adjustment of the piano action due to environmental humidity and the like, and to attach the action assembly easily and accurately. . Therefore, the performance of the piano can be improved and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an upper half of an upright piano to which a support structure for an action assembly according to an embodiment of the present invention is applied.

FIG. 2 is a side view around the action assembly of the upright piano according to the embodiment.

FIG. 3 is a vertical cross-sectional view of the upper half of an upright piano showing a support structure for a conventional action assembly.

[Explanation of symbols]

 1 Upright piano 8 Frame 9 Piano action 10 Center rail 11 Action assembly 12 Action bracket

Claims (1)

[Claims] 1. A support for an action assembly, characterized in that an action assembly consisting of a horizontally arranged center rail and a large number of piano actions fixed to the center rail is supported and fixed to a frame through a support tool. Construction.