JP3449867B2 - Mouth stick mounting structure for grand piano - Google Patents

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 grid pattern on the upper surface of a flat plate such as plywood.

[0002]

2. Description of the Related Art Conventionally, in a grand piano using a shelf board such as a particle board having both surfaces coated with a decorative material, the mouthpiece is attached as shown in FIG. That is, the shelf plate 3 and the mouth bar 1 are fixed by the dowels 8, and then the wedge-shaped notch groove 5a provided on the lower front surface of the time signature 5 and the wedge-shaped projection 1a provided on the back surface of the mouth bar 1 are fitted together. Then, in this state, the screw 4 is inserted from the lower surface of the shelf board 3 through the shelf board 3 into the time signature tree 5.
The mouthpiece 1 was attached by screwing into the.

In this case, when adjusting the keyboard assembly, the screw 4 is loosened, the time signature 5 is removed, and then the mouth stick 1 is removed.
Was removed, and the keyboard assembly was pulled out to the front side.

[0004]

By the way, in a grand piano, by using a shelf plate having a structure in which metal pipes are assembled in a grid pattern on the upper surface of a flat plate such as plywood, it is possible to reduce the manufacturing cost and the strength of the shelf plate. It was proposed to try.

However, in the grand piano using such a shelf plate, when the same mouth stick mounting structure as the conventional one is adopted, it is necessary to apply a decorative material to the front end surface of the shelf plate, which causes a problem of cost increase. . In addition, the work is complicated because it is necessary to first remove the time signature to remove the keyboard assembly.

Therefore, it has been desired to develop a new mouthpiece mounting structure suitable for a grand piano using a shelf plate having a structure in which metal pipes are assembled in a grid pattern on the upper surface of a flat plate. At that time, it has been required that the member used for attaching the mouth stick does not affect the appearance and that the work of removing the mouth stick can be easily performed.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a mouth stick mounting structure for a grand piano that does not affect the appearance and facilitates the work of removing the mouth stick.

[0008]

To solve the above described problems effect means and the invention of the Invention The present invention is, on the flat plate and the flat plate of plywood
A mouthpiece mounting structure for a grand piano using a shelf board composed of a metal pipe fixed to a surface, the extension being provided on the mouthpiece and extending rearward from the back side of the mouthpiece, and the shelf. A receiving portion provided on the front end face side of the plate and capable of contacting the extending portion, and an extending portion of the mouth bar and the receiving portion of the shelf plate are in contact with each other and can be fastened to release them from each other. When the fastening member is fastened to the shelf board by the fastening member in a state in which the extending portion and the receiving portion are in contact with each other,
The front end surface of the shelf board is covered.

This mouthpiece mounting structure is applied to a grand piano using a shelf plate having a structure in which metal pipes are assembled in a lattice shape on the upper surface of a flat plate and arranged. In such a mouth stick mounting structure, the extension portion extending rearward from the back side of the mouth stick and the receiving portion provided on the front end surface of the shelf board are fastened by the fastening member in a state of being in contact with each other, and the mouth stick is mounted on the shelf board. Since the front end face is covered, it is possible to obtain the effect that the extending portion, the receiving portion, and the like do not affect the appearance. Further, it is not necessary to attach a decorative material or the like to the front end surface of the shelf board, and an effect that the cost can be reduced can be obtained.

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

In the present invention, as described in claim 2, the extending portion and the receiving portion are engageable with each other, and the fastening member releases the fastening between the extending portion and the receiving portion while the extending portion and the receiving portion are engaged with each other. It may be configured to be fastened. In this case, since the fastening member is fastened with the extending portion of the mouth rod and the receiving portion of the shelf plate engaged, the mouth rod is fixed not only by fastening but also by engaging, The effect of being firmly fixed to the shelf board is obtained.

Further, as described in claim 3, the fastening member may be constructed so as to pass through the extending portion and the receiving portion from the lower surface of the shelf board and fasten the both. In this case, since the head portion of the fastening member is arranged on the lower surface of the shelf plate, 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, if a step is first provided on the front end of the upper surface of the flat plate and then 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 described in claim 5, a substantially L-shaped member having two surfaces which are substantially orthogonal to each other is provided, one surface of which is fixed to the rear surface of the mouth bar, and the other surface of which extends. May be performed. In this case, the effect that the extending portion can be easily formed is obtained. At this time, as described in claim 6, a recess may be provided on the back surface of the mouth rod so that one surface of the substantially L-shaped member does not project rearward from the back surface of the mouth rod. In this case, one side of the substantially L-shaped member does not change the positional relationship between the front end face of the shelf plate and the back face of the mouth bar, and thus an effect that the both can be easily positioned is obtained.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. The embodiment of the present invention is
It is needless to say that the present invention is not limited to the following examples and various forms can be adopted as long as they are within the technical scope of the present invention.

First, the first embodiment will be described. 1 is a perspective view of a shelf board, FIG. 2 is an assembled perspective view of a mouth stick, FIG. 3 is a sectional view of a grand piano with a mouth stick removed, and FIG. 4 is a sectional view of a mouth stick mounting structure. In this embodiment, a grand piano using the shelf board 30 shown in FIG. 1 will be described as an example.
In this shelf board 30, metal pipes 32 each having a substantially rectangular cross section are assembled into a grid shape and welded to each other, and this is 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). It is a thing. The fixing screw 33 penetrates the flat plate 31 from the lower surface of the flat plate 31, and the one surface 32 of the metal pipe 32.
It is screwed into a screw hole 34 formed in a.

As shown in FIG. 1, the flat plate 3 of this shelf plate 30 is shown.
A step is formed on the front side 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 engage with an extending portion 22 described later. In addition, as shown in FIG. 3, from the lower surface of the flat plate 31 to the receiving portion 35 and the metal pipe 32.
36 is provided so as to penetrate one surface 32a of the. A portion of the hole 36 that penetrates the surface 32a of the metal pipe 32 is a screw hole 36a.

The mouth bar 10 shown in FIG. 2 is formed in such a size as to cover the front end surface Fr (the surface indicated by the dotted arrow in FIG. 1) of the shelf board 30, and the rear surface B has a substantially square groove ( A depression 11 is provided. One surface (fixed portion 21) of the L-shaped member 20 is arranged in the square groove 11, and is screwed to the mouthpiece 10 by a wood screw 23 inserted into a hole provided in the fixed portion 21. The depth of the square groove 11 is equal to the fixing portion 21 of the L-shaped member 20.
Is designed so as not to project backward from the back surface B of the mouthpiece 10 (see FIG. 3).

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

Next, a method for fixing the mouthpiece 10 will be described with reference to FIGS. 3 and 4. First, a keyboard assembly (not shown) is placed on the upper surface of the shelf board 30. Next, the extending portion 22 of the mouthpiece 10 is inserted into the receiving portion 35 of the shelf plate 30 and engaged. At this time, the back surface B of the mouthpiece 10 and the front end surface Fr of the shelf plate 30 are in close contact with the fixing portion 21 of the L-shaped member 20 without being disturbed. Further, the front end face Fr of the shelf board 30 is completely covered by the mouthpiece 10. In this state, from the lower surface side of the flat plate 31 of the shelf board 30, the mouth stick attachment / detachment screw 40 is inserted into the hole 36, and the screw hole 36a provided in the surface 32a of the metal pipe 32.
It is screwed and fastened. As a result, the mouthpiece 10 is a shelf plate 30.
It is firmly fixed to.

On the other hand, when adjusting a keyboard assembly (not shown), the mouth stick attaching / detaching screw 40 is turned to remove it, and then the mouth stick 10 is pulled out to the front. Then, the extension portion 22 of the mouth bar 10 and the receiving portion 35 of the shelf plate 30 are disengaged from each other,
The mouth stick 10 is removed. After that, pull out the keyboard assembly toward you.

According to this embodiment described in detail above, the following effects can be obtained. Since the extending portion 22 of the mouthpiece 10, the receiving portion 35 of the shelf board 30 and the mouthpiece attaching / detaching screw 40 do not affect the appearance,
It does not deteriorate the appearance. Since it is not necessary to attach a decorative material or the like to the front end face Fr of the shelf board 30, the cost can be reduced accordingly. The mouthpiece 10 can be easily removed only by removing the mouthpiece attachment / detachment screw 40. Since the mouthpiece 10 is fixed not only by fastening the mouthpiece attaching / detaching screw 40 but also by engaging the extending portion 22 and the receiving portion 35, it is firmly fixed to the shelf board 30. The receiving portion 35 of the shelf board 30 is easily formed by notching the front end of the upper surface of the flat plate 31 to form a step, and then screwing this and the metal pipe 32 with the fixing screw 33 to manufacture the shelf board 30. It is formed. Since the L-shaped member 20 was used, the extension portion 22 could be easily formed. Since the square groove 11 is provided on the back surface B of the mouth rod 10 so that the fixing portion 21 does not project rearward from the back surface B of the mouth rod 10, the fixing portion 21 causes the front end face Fr of the shelf board 30 and the mouth rod 10 to move. The positional relationship with the back surface B did not change, and both could be easily positioned.

Although the L-shaped member 20 in each of the above-described 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 the L-shaped member used is reduced, so that the weight can be reduced. Second
Examples will be described. FIG. 5 is a cross-sectional view of the structure for mounting the mouth stick 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 in the flat plate 31 from the front end face side of the shelf plate 30 substantially at the center thereof to receive the receiving portion 1.
The configuration is the same as that of the first embodiment except that the number is 35. In this embodiment, as compared with the first embodiment, the notch groove is formed as the receiving portion 135 instead of the step. Therefore, the work of forming the notch groove is slightly complicated, but an effect substantially similar to that of the first embodiment is obtained. can get.

Next, a third embodiment will be described. FIG. 6 is a cross-sectional view of the structure for mounting the mouth stick of the grand piano of the third embodiment. In the present embodiment, the mouthpiece 10 has a wood screw 223 on its lower surface.
The plate-shaped member 220 fixed by. The plate-shaped member 220 has an extending portion 2 that extends rearward from the back side of the mouth rod 10.
22 is provided. Further, the lower surface of the shelf plate 30 functions as a receiving portion (this receiving portion only abuts with the extending portion 222 rather than engaging with it). The mouth stick 10 is attached to the mouth stick 1
It is performed by screwing with the mouth stick attachment / detachment screw 40 in a state in which the extension portion 222 of 0 is in contact with the lower surface as the receiving portion of the shelf plate 30. In this embodiment, since the extending portion 222 is fixed only by fastening the screw 40 for attaching and detaching the mouthpiece, the fixing strength is slightly inferior to that of the first embodiment, but an effect substantially equivalent to that of the first embodiment is obtained. To be

[Brief description of 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 mouthpiece according to the first embodiment.

FIG. 3 is a cross-sectional view of a state in which a mouth bar of the first embodiment is removed.

FIG. 4 is a cross-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.

7A and 7B are explanatory views of a conventional stick mounting structure for a grand piano, in which FIG. 7A is a perspective view and FIG. 7B is a sectional view.

[Explanation of symbols]

10 ... Mouth bar, 11 ... Square groove, 20 ... L-shaped member, 21 ... Fixing part, 22 ... Extending part, 22a ...
・ Hole, 23 ... Wood screw, 30 ... Shelf plate, 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.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References: 59-53397 (JP, U): 57-794 (JP, U): 59-95395 (JP, U): 54- 94222 (JP, U) Actual public 61-14076 (JP, Y2) Actual public 62-13103 (JP, Y2) Actual public 52-18130 (JP, Y2) Utility model registration 2597041 (JP, Y2) (58) ) Fields surveyed (Int.Cl. ⁷ , DB name) G10C 3/12 G10C 1/04

Claims (6)

(57) [Claims] 1. A flat plate such as a plywood and fixed to the upper surface of the flat plate
A mouthpiece mounting structure for a grand piano using a shelf board composed of a metal pipe, and an extension part provided on the mouthpiece and extending rearward from a rear side of the mouthpiece, and a front end of the shelf board. A receiving member that is provided on the surface side and that is capable of contacting the extension portion, and a fastening member that releasably fastens the extension portion of the mouth bar and the receiving portion of the shelf plate in a state of contacting each other. Wherein the mouth bar covers a front end surface of the shelf plate when the extension part and the receiving part are in contact with each other and are fastened to the shelf plate by the fastening member. Grand piano mouth stick mounting structure. 2. The extending portion and the receiving portion are engageable with each other, and the fastening member is configured to releasably fasten the extending portion and the receiving portion in a state of being engaged with each other. The mouth stick mounting structure for a grand piano according to claim 1, characterized in that. 3. The mouth stick mounting of a grand piano according to claim 1, wherein the fastening member penetrates the extending portion and the receiving portion from a lower surface of the shelf board to fasten both of them. 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. A substantially L-shaped member having two surfaces that are substantially orthogonal to each other, one surface of which is fixed to the back surface of the mouth rod, and the other surface of which is the extension portion. Claim 1
The mouth stick mounting structure for a grand piano according to any one of to 4. 6. The back surface of the mouth bar is provided with a recess so that one surface of the substantially L-shaped member does not project rearward from the back surface of the mouth bar. Paragraph 5 mounting structure of a grand piano mouth stick.