JPH1063260A - Keyslip mounting structure of grand piano - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the execution of the work to remove a keyslip without affecting appearance. SOLUTION: A keyboard assembly is placed atop a keybed 30 and the extension part 22 of the keyslip 10 is inserted and engaged into and with the receiving part 35 of the keybed 30. At this time, the rear surface of the keyslip 10 and the front end face of the keybed 30 come into tight contact with each other without being hindered by the fixing part 21 of an L-shaped member 20. The front end face of the keybed 30 is completely covered with the keyslip 10. Screws 40 for attaching and detaching the keyslip 10 are inserted in this state into the flat plate 31 of the keybed 30 from the rear surface side of this flat palate and are screwed and fastened into the threaded holes disposed at the surface 32a of a metallic pipe 32. As a result, the keyslip 10 is securely fixed to the keybed 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mouthpiece mounting structure for a grand piano using a shelf plate having a structure in which metal pipes are assembled in a lattice on a flat plate such as plywood.

[0002]

2. Description of the Related Art Conventionally, in a grand piano using a shelf board in which a decorative material is attached to both sides of a particle board or the like, a mouthpiece is attached as shown in FIG. That is, the shelf plate 3 and the mouth stick 1 are fixed by the dowels 8, and then the wedge-shaped notch grooves 5a provided below the front surface of the clap 5 and the wedge-shaped protrusions 1a provided on the back surface of the mouth stick 1 are fitted. In this state, the screw 4 is moved from the lower surface of the shelf 3 through the shelf 3
The mouth stick 1 was attached by screwing it.

[0003] In this case, when adjusting the keyboard assembly, loosen the screw 4 and remove the clasp 5 to remove the clasp 1.
Was removed, and the keyboard assembly was pulled out to the front.

[0004]

By the way, in a grand piano, by using a shelf plate having a structure in which metal pipes are assembled in a lattice on the upper surface of a flat plate such as plywood, the manufacturing cost of the shelf plate can be reduced and the strength can be increased. It was suggested to do so.

However, in the case of a grand piano using such a shelf plate, if a mouthpiece mounting structure similar to the conventional one is adopted, it is necessary to apply a decorative material to the front end face of the shelf plate, which causes a problem that the cost increases. . In addition, the work was complicated because it was necessary to first remove the clapper to remove the keyboard assembly.

[0006] Therefore, there has been a demand for the development of a new mouthpiece mounting structure suitable for a grand piano using a shelf having a structure in which metal pipes are assembled in a grid on the upper surface of a flat plate. At that time, it has been required that the member used to attach the mouthpiece does not affect the appearance, and that the work of removing the mouthstick can be easily performed.

The present invention has been made in view of the above problems, and has as its object to provide a mouthpiece mounting structure for a grand piano, which can easily remove a mouthpiece without affecting the appearance.

[0008]

Means for Solving the Problems and Effects of the Invention In order to solve the above problems, the present invention provides a mouthpiece mounting structure of a grand piano using a shelf plate having a structure in which a metal pipe is arranged on the upper surface of a flat plate such as plywood. An extension portion provided on the mouth stick and extending rearward from the back side of the mouth stick, a receiving portion provided on the front end face side of the shelf plate and capable of contacting the extension portion, In the state where the extended portion of the mouth bar and the receiving portion of the shelf board are in contact with each other, the fastening member for fastening the two in a releasable manner is provided.
When the extension portion and the receiving portion are in contact with each other and fastened to the shelf by the fastening member, the shelf covers the front end surface of the shelf.

Such a mouthpiece mounting structure is applied to a grand piano using a shelf plate having a structure in which metal pipes are arranged in a grid, for example, on the upper surface of a flat plate. In such a mouthpiece mounting structure, the extension part extending rearward from the back side of the mouthpiece and the receiving part provided on the front end face of the shelf board are fastened by a fastening member in a contact state, and the mouthpiece is provided on the shelf board. Since the front end surface is covered, an effect is obtained in that the extended portion, the receiving portion, and the like do not affect the appearance. In addition, there is no need to attach a decorative material or the like to the front end surface of the shelf, so that an effect of reducing costs can be obtained.

Further, for example, when adjusting the keyboard assembly, the keyboard is removed from the shelf and the keyboard assembly is pulled out. In this case, the fastening of the fastening member is released and the keyboard is removed from the shelf. Remove and pull out the keyboard assembly. As described above, when the mouth stick needs to be removed, an effect that the removal operation can be easily performed is obtained.

In the present invention, the extension portion and the receiving portion can be engaged with each other, and the fastening member releases the fastening when the extension portion and the receiving portion are engaged. You may comprise so that fastening may be possible. In this case, since the fastening member is fastened in a state where the extended portion of the mouth bar and the receiving portion of the shelf board are engaged, the mouth bar is fixed not only by fastening but also by engagement. The effect of being firmly fixed to a shelf board is obtained.

Further, as described in claim 3, the fastening member may be configured to penetrate the extension and the receiving portion from the lower surface of the shelf to fasten the both. In this case, since the head of the fastening member is disposed on the lower surface of the shelf, an effect is obtained that the fastening member does not affect the appearance.

Further, as described in claim 4, the receiving portion may be formed by a step provided at the front end of the upper surface of the flat plate and the lower surface of the metal pipe. In this case, first, a step is provided at the front end of the upper surface of the flat plate, and then, when the shelf is manufactured by combining this with the metal pipe, the receiving portion is formed, so that the receiving portion can be easily formed. Is obtained.

Further, as set forth in claim 5, a substantially L-shaped member having two surfaces substantially orthogonal to each other is provided, one surface is fixed to the back surface of the mouthpiece, and the other surface is extended. May be achieved. In this case, an effect is obtained that the extension portion can be easily formed. At this time, as described in claim 6, a recess may be provided on the back surface of the mouth stick so that one surface of the substantially L-shaped member does not project rearward from the back surface of the mouth stick. In this case, the positional relationship between the front end surface of the shelf plate and the back surface of the mouth stick does not change due to the one surface of the substantially L-shaped member, so that the effect that both can be easily positioned can be obtained.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. Note that the embodiment of the present invention
It is needless to say that the present invention is not limited to the following embodiments, and can take various forms within the technical scope of the present invention.

First, a first embodiment will be described. 1 is a perspective view of a shelf board, FIG. 2 is an assembled perspective view of a mouthpiece, FIG. 3 is a sectional view of a grand piano with a mouthpiece removed, and FIG. 4 is a sectional view of a mouthpiece mounting structure. In this embodiment, a grand piano using the shelf plate 30 shown in FIG. 1 will be described as an example.
The shelf board 30 is composed of metal pipes 32 each having a substantially square cross section, assembled in a lattice shape and welded to each other, placed on the upper surface of a flat plate 31 such as plywood, and joined by a plurality of fixing screws 33 (see FIG. 3). Things. The fixing screw 33 penetrates the flat plate 31 from the lower surface of the flat plate 31 and is connected to one surface 32 of the metal pipe 32.
a is screwed into a screw hole 34 formed in the hole a.

As shown in FIG. 1, the flat plate 3
A step is formed in front of the upper surface of 1, and the step and the lower surface of the metal pipe 32 form a receiving portion 35 that can be engaged with the extension 22 described later. Also, as shown in FIG.
A hole 36 is provided so as to penetrate one surface 32a. The portion of the hole 36 that penetrates the surface 32a of the metal pipe 32 is a screw hole 36a.

The mouth stick 10 shown in FIG. 2 is formed to have a size that covers the front end surface Fr (the surface indicated by the dotted arrow in FIG. 1) of the shelf plate 30, and has a substantially rectangular square groove ( A depression 11 is provided. One surface (fixed portion 21) of the L-shaped member 20 is disposed in the square groove 11, and is screwed to the mouth stick 10 by a wood screw 23 inserted into a hole provided in the fixed portion 21. The depth of the square groove 11 is determined by the fixing portion 21 of the L-shaped member 20.
Are designed not to protrude rearward from the back surface B of the mouth stick 10 (see FIG. 3).

The other surface of the L-shaped member 20 (extending portion 2)
2) extends rearward from the back B side of the mouth stick 10. The extension 22 is provided with a hole 22a at a predetermined position. The hole 22 a is formed such that the axis thereof coincides with the axis of the hole 36 when the extension 22 is engaged with the receiving portion 35.

Next, a method of fixing the mouth stick 10 will be described with reference to FIGS. First, a keyboard assembly (not shown) is placed on the upper surface of the shelf board 30. Next, the extension portion 22 of the mouth stick 10 is inserted into and engaged with the receiving portion 35 of the shelf board 30. At this time, the back surface B of the mouth bar 10 and the front end surface Fr of the shelf plate 30 are closely attached without being disturbed by the fixing portion 21 of the L-shaped member 20. Further, the front end surface Fr of the shelf board 30 is completely covered by the spout 10. In this state, a screw 40 is inserted into the hole 36 from the lower surface side of the flat plate 31 of the shelf plate 30, and a screw hole 36a provided in the surface 32a of the metal pipe 32 is formed.
And tightened. Thereby, the mouth stick 10 is connected to the shelf plate 30.
Firmly fixed to

On the other hand, when adjusting the keyboard assembly (not shown), the screw 40 for detaching and attaching the spigot is turned off, and then the spike 10 is pulled out toward the user. Then, the engagement between the extending portion 22 of the mouth bar 10 and the receiving portion 35 of the shelf board 30 is released,
Mouth stick 10 is removed. After that, pull out the keyboard assembly.

According to the above-described embodiment, the following effects can be obtained. Since the extending portion 22 of the mouth stick 10, the receiving portion 35 of the shelf 30 and the mouth stick attaching / detaching screw 40 do not affect the appearance,
Does not degrade the appearance. Since there is no need to attach a decorative material or the like to the front end surface Fr of the shelf board 30, the cost can be reduced accordingly. The mouthpiece 10 can be easily removed simply by removing the mouthpiece attaching / detaching screw 40. The mouth stick 10 is fixed not only by the fastening of the mouth stick attaching / detaching screw 40 but also by the engagement between the extension part 22 and the receiving part 35, so that the mouth stick 10 is firmly fixed to the shelf board 30. The receiving portion 35 of the shelf plate 30 is formed by cutting the front end of the upper surface of the flat plate 31 to form a step, and then screwing this to the metal pipe 32 with the fixing screw 33 to manufacture the shelf plate 30. It is formed. Since the L-shaped member 20 was used, the extension portion 22 could be easily formed. A square groove 11 is provided on the back surface B of the mouth bar 10 so that the fixing portion 21 does not protrude backward from the back surface B of the mouth bar 10. The positional relationship with the back surface B did not change, and the positioning of the two could be easily performed.

Although the L-shaped member 20 in each of the above embodiments is a member extending in a rail shape in the longitudinal direction, a plurality of short L-shaped members may be arranged in the longitudinal direction. In this case, the amount of use of the L-shaped member is reduced, so that the weight is reduced. Then the second
An example will be described. FIG. 5 is a cross-sectional view of the mouthpiece mounting structure of the grand piano of the second embodiment. In this embodiment,
In place of the receiving portion 35 of the first embodiment, a notch groove is provided substantially at the center of the flat plate 31 from the front end face side of the shelf plate 30 to receive the notched groove.
The configuration is the same as that of the first embodiment except that it is 35. In the present embodiment, notches but not steps are formed as the receiving portions 135 as compared with the first embodiment, so that the operation of forming the notches is slightly complicated, but the same effect as that of the first embodiment is obtained. can get.

Next, a third embodiment will be described. FIG. 6 is a sectional view of the mouthpiece mounting structure of the grand piano of the third embodiment. In the present embodiment, the mouth bar 10 has a wood screw 223 on the lower surface.
And a plate-like member 220 fixed at the position. The plate-like member 220 extends from the back side of the mouth stick 10 to the rear.
22. In addition, the shelf plate 30 functions as a receiving portion (the receiving portion does not engage with the extension portion 222 but only contacts the extension portion 222). Mouth stick 10
This is performed by screwing with the mouth stick attaching / detaching screw 40 in a state where the extension portion 222 of the “0” is in contact with the lower surface as the receiving portion of the shelf board 30. In this embodiment, since the extension portion 222 is fixed only by the fastening of the mouthpiece attaching / detaching screw 40, the rigidity of the fixing is slightly inferior to that of the first embodiment, but substantially the same effect as that of the first embodiment is obtained. Can be

[Brief description of the drawings]

FIG. 1 is a perspective view of a shelf board according to a first embodiment.

FIG. 2 is an assembled perspective view of the mouth stick of the first embodiment.

FIG. 3 is a cross-sectional view of the first embodiment with a mouth stick removed.

FIG. 4 is a sectional view of the mouthpiece mounting structure of the first embodiment.

FIG. 5 is a sectional view of a mouthpiece mounting structure according to a second embodiment.

FIG. 6 is a sectional view of a mouthpiece mounting structure according to a third embodiment.

FIGS. 7A and 7B are explanatory views of a conventional grand piano mouth stick mounting structure, wherein FIG. 7A is a perspective view and FIG. 7B is a cross-sectional view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Mouth stick, 11 ... Square groove, 20 ... L-shaped member, 21 ... Fixed part, 22 ... Extension part, 22a ...
・ Hole, 23: Wood screw, 30: Shelf, 31:
Flat plate, 32: metal pipe, 33: fixing screw, 3
4 ... screw hole, 35 ... receiving part, 36 ... hole, 3
6a: screw hole; 40: screw for attaching / detaching mouth bar.

Claims (6)

[Claims] 1. A mouthpiece mounting structure for a grand piano using a shelf plate having a structure in which a metal pipe is disposed on the upper surface of a flat plate such as plywood, provided on the mouthpiece, and from the rear side of the mouthpiece to the rear side. An extending portion extending to the front end surface side of the shelf plate, a receiving portion that can contact the extending portion, and an extending portion of the mouth stick and a receiving portion of the shelf plate contacted. A fastening member for releasably fastening the two in the state, wherein the mouth bar is fastened to the shelf board by the fastening member in a state where the extending portion and the receiving portion are in contact with each other. A mouthpiece mounting structure for a grand piano, which covers the front end surface of the shelf. 2. The extension portion and the receiving portion are engageable with each other, and the fastening member is configured to releasably fasten the extension portion and the receiving portion in a state where the extension portion and the receiving portion are engaged with each other. 2. A mouthpiece mounting structure for a grand piano according to claim 1, wherein: 3. The sprocket mounting of a grand piano according to claim 1, wherein the fastening member penetrates the extension portion and the receiving portion from a lower surface of the shelf plate to fasten the two. Construction. 4. The grand piano according to claim 1, wherein the receiving portion is formed by a step provided at a front end of an upper surface of the flat plate and a lower surface of the metal pipe. Mouth stick mounting structure. 5. It has two surfaces that are substantially orthogonal to each other, one surface is fixed to the back surface of the mouth stick, and the other surface is provided with a substantially L-shaped member forming the extension. Claim 1
5. A mouthpiece mounting structure for a grand piano according to any one of items 4 to 4. 6. The back face of the mouth stick is provided with a recess so that one surface of the substantially L-shaped member does not project rearward from the back face of the mouth stick. Item 6. A mouthpiece mounting structure for a grand piano according to Item 5.