JPH0116147Y2 - - Google Patents

Description

[Detailed Description of the Invention] The purpose of this invention is to improve the mounting accuracy of the shelf in a piano shelf mounting structure.

As shown in FIG. 1, conventionally, the inner surface 1 of the arm 1
A shelf board mounting tree 3 is attached to the shelf board mounting tree 3, and a shelf board 2 having notches 2a at both ends is mounted and mounted on the shelf board mounting tree 3. In addition, in the figure, the T mark indicates a wood screw.

Although not shown, a keyboard reed that swingably supports a plurality of keys is placed on the shelf board 2 of the piano, and a clapboard is attached to each end of the reed, and a mouthpiece is attached to the front end of the reed. A rod is attached,
Furthermore, an action base bolt is provided on the upper surface of the rear end. The action base bolt supports the action bracket, and its vertical and horizontal positions are determined in such a way that the hammer in the action, which is attached to the center rail installed on the action bracket, is placed in the appropriate position relative to the strings. This is an important thing to set. If the attachment position of this action base bolt is not accurate, the hammer will not strike the correct point on the string. As described above, the mounting position of the shelf board 2, especially the position of the upper surface 2b of the shelf board 2, is extremely important. However, in addition to the thickness error of the shelf board 2 as in the conventional case, there is also a machining error of the notch 2a, resulting in a drawback that the total error becomes large.

This idea solves the practical drawbacks,
As shown in FIGS. 2 and 3, cross-sectional channels 4 made of metal are fixed to the inner surfaces 1a of the left and right arms 1, with their openings 4a facing each other. Both ends of the shelf board 2 are inserted into the opening 4a of each channel 4, and the upper surface of the shelf board 2 is contacted and fixed to the upper surface of the opening 4a of the channel 4, so that the shelf board 2 is constructed between the left and right arms 1. This is what I did.

In addition, in FIG. 2, 5 indicates a wedge driven into the gap between the lower surface of the shelf board 2 and the channel 4.

As described above, according to this invention, as long as the channel 4 is attached to the arm 1 at the proper position, the shelf board 2
This has the advantage that even if there is some thickness error, it does not pose a problem at all, and there is no need to process the notches 2a in the shelf board 2 as in the conventional case.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional piano shelf mounting structure, Fig. 2 is a sectional view of a piano shelf mounting structure according to an embodiment of this invention, and Fig. 3 is a perspective view of a channel used in this invention. It is. In the figure, 1...branch, 1a...inner surface of arm 1,
2... Shelf board, 2b... Upper surface of shelf board 2, 4... Channel.

Claims (1)

[Scope of utility model registration request] Openings 4a of channels 4 made of metal each having a U-shaped cross section are fixed to the inner corner surfaces 1a of the left and right arm trees 1, facing each other, and both ends of the shelf board 2 are inserted into the openings 4a of each channel 4. At the same time, the top surface of the shelf board 2 is brought into contact with and fixed to the inner upper surface of the opening 4a of the channel 4, and the front shelf board 2 is constructed between the front armrests 1, thereby providing a piano shelf mounting structure.