JPH02790Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a piano shelf mounting structure.

The conventional piano shelf mounting structure is as shown in the schematic diagram of the main part shown in FIG.
A shelf board 4 is placed on top. Further, this shelf board 4 is placed on a shelf board receiving protrusion 5a of a shelf front edge frame 5, and the vertical adjustment of the shelf board 4 is performed by a wedge 6. Therefore, although the frame 5 is not shown, the back string attached to the back mechanism consisting of a support and a soundboard is stretched, and the main board 1 with the shelf board stoppers 3 and the arms 2 attached to this back mechanism is attached. Attachment: Place the shelf board 4 between the shelf stopper 3 and the shelf receiving protrusion 5a of the frame 5, and then place the action base and the keyboard (not shown) on the shelf board 4. A bracket equipped with a reed and an action is installed. In such a configuration, the best points must be considered, such as the attachment of the back mechanism to the main board and shelf board, the keyboard to the action, the string striking point between the action and the frame, and the distance between this striking point and the action hammer. In order to obtain this, various adjustments must be made, such as adjusting the bracket using the action base bolt installed on the action base, adjusting the capstan installed on the keyboard, and adjusting the wedge between the shelf board and the shelf support protrusion. requires,
Moreover, this adjustment required skill and a considerable amount of time.

This invention was made in view of the above-mentioned drawbacks, and consists of integrally forming a U-shaped metal fitting having a central long portion and short portions at both ends using a metal material having a U-shaped or L-shaped cross section. The central long part is fastened to the front surface of the frame, and the short parts at both ends are fastened to the exterior main board or arm, and the central long part and the short parts at both ends have a U-shaped or L-shaped cross section to the back of the shelf. Insert or place the edge and both edges to hold the shelf board, attach the back mechanism and the outer main board arm, etc., the string-striking point between the action and the string stretched on the frame, and the string-striking point and the action.・Using the U-shaped bracket fastened to the frame as a reference point for the mutual spacing between the keyboard, action, and strings, such as the distance from the hammer, reduces installation work and makes various adjustments easier. This is how it was done.

Hereinafter, the piano shelf mounting structure according to this invention will be explained in detail with reference to drawings of embodiments.

2A and 2B show the U-shaped metal fitting 7 used in the piano shelf mounting structure of this invention, and FIG. 2C is a schematic structural diagram of the main parts for explaining the piano shelf mounting structure of this invention. It is. In the figure, the U-shaped metal fitting 7
is a metal shape with a U-shaped or L-shaped cross section, and is formed of a central long part 7a and short parts 7b at both ends, and the central long part 7a of this U-shaped metal fitting 7 is connected to the frame, such as a shelf board receiving protrusion 5a, etc. Securely fasten to the frame reference point with bolts, etc. After that, the main plate 1 or the arm 2 glued to the main plate 1 is fastened to the short parts 7b, 7b at both ends of the U-shaped metal fitting 7, and the shelf board ( (not shown) are inserted or placed on the front edge and both sides of the shelf board, and the keyboard reed with the keyboard installed, the action base, and the bracket equipped with the action are installed using the plane of this shelf board as a reference. .

As described above, according to the piano shelf mounting structure according to this invention, by fastening the U-shaped metal fittings integrally formed to the frame and the main board or to the arms glued to the main board, various parts of the exterior, keyboard, and action can be attached. A shelf mounting plane serving as a reference for the mounting portion is easily formed. Then, by inserting or placing the rear edge and both edges of the shelf board in the U-shaped section or L-shaped section of this U-shaped metal fitting and fixing the shelf board, the shelf board and This provides reinforcement against changes that occur in the frame. These features reduce the amount of adjustments that must be made to the sheath, keyboard, and actions compared to traditional shelf structures.

[Brief explanation of the drawing]

Figure 1 is a schematic view of the main parts for explaining the conventional piano shelf mounting structure, and Figures 2A and 2B show examples of U-shaped metal fittings used in the piano shelf mounting structure of this invention. FIG. 2C is a schematic structural diagram of main parts for explaining the piano shelf mounting structure of this invention. In the figure, 1...main board, 2...branch, 3...
Shelf board stopper, 4... Shelf board, 5... Frame, 6...
...Wedge, 7...U-shaped metal fitting.

Claims (1)

[Scope of utility model registration request] A U-shaped metal fitting having a central long part and short parts at both ends is integrally formed with a metal material having a U-shaped or L-shaped cross section, and the central long part of the metal fitting is fastened to the front surface of the frame, and the both ends Fasten the short part to the exterior main board or arm, and insert or place the rear edge and both edges of the shelf board in the U-shaped cross section or L-shaped part of the central long part and the short parts at both ends of the U-shaped metal fitting. A piano shelf mounting structure characterized by holding a shelf.