JPH0753109Y2 - Grand piano leg mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a leg mounting device for a grand piano, which has a simple structure, is easy to manufacture, and can provide stable fastening.

(Prior Art) Conventionally, a grand piano has a structure in which a main body composed of a frame, a pillar, an action mechanism, a keyboard, etc. is supported by three legs, and this leg is generally a piano main body P as shown in FIG. The two ends of the bottom surface of the shelf plate K are inwardly inwardly of the side plate surface and the bottom surface of a support (not shown) behind the piano body P by bolts B. When the piano is transported, the occupied area is large with the legs L still attached, so the legs L can be removed and laid down to reduce the occupied area so that a plurality of pianos can be transported at one time. Therefore, it is premised that the legs L of the grand piano can be attached to and detached from the piano body P.

The leg L is provided with a decorative leg ornament D as shown in FIGS. 5A and 5B so that the leg L is protruded from the side surface of the side plate S.
Even if an attempt is made to attach the leg L to the piano main body P as described above, the leg decoration D cannot be fixed to the side plate S by adhesion, and the fixation by a wood screw or the like is not possible. Then, the leg decoration D and the overall decorativeness of the piano are impaired,
Also, the work of attaching and detaching the legs is inconvenient.

For this reason, since the side plate S and the leg decoration D are not fastened, an unsightly gap T is formed between the side plate S and the leg decoration D as shown in FIG. 6, and the sense of unity between the side plate S and the leg decoration D is impaired. However, there is a drawback that the gap T is further increased due to the warp of the leg ornament D.

The present invention aims to eliminate the above-mentioned drawbacks.

(Means for Solving the Problems) In order to achieve the above object, in a grand piano in which legs are detachably attached to the lower surface of the side plate, a locking hole having a reverse keyhole shape. And a metal fitting having an inclined surface formed by gradually deepening the back surface of the locking hole from above,
It has a leg decoration on the upper part, and a leg with the head of a wood screw or bolt protruding on the back of this leg decoration, and the locking metal is embedded in a groove provided at a predetermined position of the side plate, The head of the wood screw or bolt of the leg ornament is inserted into the engaging hole of the leg ornament to press and engage the leg ornament with the side plate to attach the leg to the lower surface of the side plate.

(Operation) By moving the head of the wood screw or bolt on the back of the leg ornament inserted into the locking hole of the locking metal fitting upward, the head is pulled toward the side plate surface by the inclined surface of the locking metal fitting. Then, the back of the leg decoration is pressed against the side plate.

Embodiment An embodiment according to the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view showing a leg mounting device of a grand piano according to the present invention. Reference numeral 1 is a locking metal fitting, which has a vertically elongated through groove 2 at the center of a plate body made of metal or the like, and a round hole at the lower end thereof. And a locking hole 3 having a reverse keyhole shape integrally formed with. As shown in FIG. 2, the rear surface of the locking hole 3 has a through groove 2
The inclined surface 4 is formed by gradually deepening from the upper side to the round hole. On the side plate S of the piano, the locking metal fitting 1 is placed at a predetermined position.
Mounting groove 5 of the same shape as the outer shape of the locking fitting 1 for burying the
Further, a longitudinal groove 6 having the same diameter width as the round hole of the engaging hole 3 is provided, and the engaging metal fitting 1 is embedded in the mounting groove 5 and attached by a wood screw or the like.

A leg body 7 is integrally formed with a leg ornament 8 on the upper side, and a wood screw 9 is protruded and attached to the back surface of the leg ornament 8.
Is embedded in the lower surface of the head and the rear surface of the leg ornament 8 in a size slightly smaller than the thickness of the locking fitting 1.

The mounting device configured in this manner is shown in FIGS.
The wood screw 9 on the back surface of the leg ornament 8 is inserted into the locking hole 4 of the locking metal fitting 1 as shown in FIG. Then, as shown in FIG. 3 (B), when the leg body 7 is lifted up, the wood screw 9 on the back surface of the leg ornament 8 is inserted into the through groove 2 of the locking metal fitting 1, and the head of the wood screw 9 is locked by the metal fitting. Since it moves along the inclined surface 4 of 1, the side plate S
The dowel groove 10 (not shown) provided on the shelf plate K or the column (not shown) has the dowel 10 provided on the upper surface of the leg body 7 while being pulled toward the surface to press the back surface of the leg ornament 8 against the side plate S. The mounting position of the leg body 7 is determined by fitting the leg body 7 to the shelf plate K or the support column with the bolt B via the mounting bracket 11 to complete the mounting of the leg 7.

(Effect) As described above, according to the leg mounting device of the grand piano of the present invention, even if the leg ornament is slightly warped, the locking metal fitting attached to the side plate presses the shelf ornament to the side plate surface. Since they are in close contact with each other, stable and reliable fastening can be obtained with a simple structure that does not cause an unsightly gap between the side plate of the piano and the back surface of the leg ornament.

Further, since it is not necessary to bond the leg decoration and to fasten it with a wood screw or the like, it is possible to easily attach and detach the legs, which is a prerequisite for the grand piano.

[Brief description of drawings]

1 is an explanatory view of a fastening device for a grand piano according to the present invention, and FIG. 2 is a longitudinal sectional view of a locking metal fitting according to the present invention.
3 (A) and 3 (B) are cross-sectional views of the essential parts showing the assembled state of FIG. 1, FIG. 4 is a side view showing the leg mounting state of the conventional grand piano, and FIGS. 5 (A) and 5 (B). ) Is a perspective view of a leg having a leg decoration, and FIG. 6 is a side view of FIG. 5 (B). In the figure, 1 ... Locking fitting, 2 ... Through groove 3 ... Locking hole, 4 ... Inclined surface, 7 ... Leg body, 8 ... Leg decoration, 9 ... Wood screw, S ... Side plate, K ... Shelf B ... Bolt

Claims (1)

[Scope of utility model registration request] 1. A grand piano in which legs are detachably attached to a lower surface of a side plate, and has locking holes each having a reverse keyhole shape, and the back surface of each locking hole is gradually deepened from above. Locking metal fittings with a slanted surface and leg decorations on the top,
The leg decoration comprises a leg having a head of a wood screw or a bolt projecting on the back side of the leg ornament, the locking fitting is embedded in a groove provided at a predetermined position of the side plate, and the leg is fitted in a locking hole of the locking fitting. A leg mounting device for a grand piano, characterized in that the head of a wood screw or bolt of a decoration is inserted to press and lock the leg decoration to the side plate to attach the leg to the lower surface of the side plate.