JPH1145084A - Device of preventing upright piano from being fallen down by earthquake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the forward fall down of a piano at the time of an earthquake with simple and inexpensive constitution without requiring work of walls, etc., at all by mounting a cushion for weakening repulsion when a piano body inclines to the rear surface of a piano body and comes into contact with a rear wall. SOLUTION: This preventive device 12 comprises the cushion 13 mounted on the rear surface of the piano body 10. The cushion 13 comprises an intimately mixed foam of, for example, hydrophobic urethane and a bituminous substance. The viscoelasticity of this intimately mixed foam has the characteristic that the deformation when external force acts and the restoration of the original shape after the deformation does not instantaneously take place and requires some time; therefore the foam has a high buffer ability. The cushion 13 is adhered to cover the cross-beam lining extending laterally in the upper part of the rear surface of the piano body 10. In the event of the occurrence of the earthquake, the piano body 10 first inclines backward and the cushion 13 comes into contact with the wall. At this time, the impact load on the wall is well absorbed by the cushion 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing an upright piano from falling forward in the event of an earthquake.

[0002]

2. Description of the Related Art In general, an upright piano has a vertically elongated shape in which strings are stretched in a vertical direction, and has a vertically long shape whose height is much larger than its depth, and heavy parts such as a frame and a support are arranged at the rear. Since the center of gravity is deviated rearward, it has a characteristic that it is easy to fall down in the front-rear direction, particularly in the rearward direction. In addition, when used at home or the like, an upright piano is often installed close to a wall in a room with the back thereof. For this reason, when a large earthquake occurs, the upright piano tends to lean backward and hit the wall in most cases, and then fall forward due to the reaction.

[0003] For this reason, conventionally, a fixing bracket is attached to the rear wall of the piano, and the piano is fixed to the wall with the fixing bracket, or a wall material having a cushioning property is attached to the wall. By reducing the resilience of the piano when it hits a wall, the piano is prevented from falling forward in the event of an earthquake.

[0004]

However, the above-mentioned conventional method for preventing overturning requires installation of a fixing bracket or wall material on the wall of the room, which requires construction costs and is cumbersome, and also requires installation of a piano. Each time the position is changed, the fixtures must be replaced.

The present invention has been made in order to solve such a problem, and has a simple and inexpensive configuration, without requiring any work on a wall or the like, and without causing any trouble in front of a piano during an earthquake. It is an object of the present invention to provide an earthquake prevention device for an upright piano which can prevent a fall.

[0006]

In order to achieve the above object, an apparatus for preventing an earthquake from overturning an upright piano according to the present invention comprises a repulsive force when the piano body is inclined and hits a rear wall on the back of the piano body. It is characterized by the fact that a cushion for weakening is attached.

[0007] In this earthquake fall prevention apparatus, when the upright piano is installed with the wall of the room as the back, when the piano body tilts backward due to the occurrence of a large earthquake, the cushion attached to the back of the piano body becomes rearward. Hit the wall.
As a result, the impact load on the wall is absorbed by the cushion,
Since the repulsive force of the wall is weakened, the recoil after that can suppress the degree of the piano body leaning forward, and therefore,
It is possible to prevent the piano from falling forward. Also,
Since the cushion is attached to the piano body, no work is required on the walls of the room.

In this case, the cushion preferably has viscoelasticity.

According to this structure, the cushion has viscoelasticity, so that the deformation at the time of collision with the wall and the restoration of the original state after the deformation are not instantaneously performed, but it takes a certain time, that is, the cushion is elastic. Has the property of not. Therefore, according to this cushion, by having a higher cushioning capacity than a cushion having only elasticity, the repulsive force of the wall can be further weakened, so that the piano body is less likely to tilt forward, and the piano can be more securely turned over. Can be prevented.

In this case, it is preferable that the cushion is made of a foam material mixed with bituminous material.

According to this structure, the cushion having viscoelasticity can be formed at a low cost.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 and 2 show an upright piano in which an apparatus for preventing an earthquake from falling over according to the present invention is incorporated.

As shown in both figures, an upright piano 1
Is a pair of left and right master plates 3, 3, arms 4, 4, wife base 5,
5, a shelf receiving pillar 6, 6 (only one is shown except for the main board), a keyboard cover 7, a roof rear 8, a roof front 9, and the like. A frame, a soundboard, a string, a keyboard, an action, and the like (not shown) are provided in an internal space surrounded by these components and the like, and a piano body 10 which is vertically long and whose center of gravity is located on the rear side is configured as a whole. ing. Also, the piano body 10
Is supported by a total of four casters 11 (only two are shown) provided on the front and back and left and right provided on the wife base 5 and the like, and is configured to be movable by these casters 11.

The earthquake fall prevention device 12 according to the present invention comprises a cushion 13 attached to the back of the piano body 10. The cushion 13 is made of, for example, a mixed foam of hydrophobic urethane and bituminous (asphaltous) material. Therefore, viscoelasticity, that is, deformation when an external force is applied and restoration to the original state after the deformation are achieved. Has the characteristic that it takes a certain amount of time without being performed instantaneously, and therefore has a high buffering capacity. The cushion 13 is adhered to the upper part of the back of the piano body 10 so as to cover a girder (not shown) extending in the left-right direction.

Next, the operation of the above-structured earthquake fall prevention device 12 will be described. As shown in FIG. 2, the upright piano 1 is usually installed on the floor F in a state where the cushion 13 is close to or in contact with the wall W of the room by moving using the casters 11. In this state, when a large earthquake occurs, the center of gravity of the piano body 10 is located at the rear side, and therefore, in most cases, the piano body 10 is first inclined backward, and the cushion 13 on the rear surface hits the wall W. Thereby, the impact load on the wall W is favorably absorbed by the cushion 13 having viscoelasticity, and the repulsive force of the wall W is greatly reduced. As a result, it is possible to sufficiently prevent the piano body 10 from leaning forward due to the recoil, and
It is possible to reliably prevent the upright piano 1 from falling forward.

Since the cushion 13 is attached to the piano body 10, no work is required on the wall W, and the construction is very simple and inexpensive. Further, the upright piano 1 only needs to be installed with the wall W as a back, similarly to the normal installation mode, and the position of the wall W is not affected. Don't come. Further, since the cushion 13 is located between the piano body 10 and the wall W and is only slightly visible from the side, the aesthetic appearance of the upright piano 1 is not affected.

The present invention is not limited to the embodiment described above, but can be implemented in various modes.
For example, in the embodiment, as the cushion having the viscoelasticity, a hydrophobic urethane and a bituminous mixed foam are listed.
This is merely an example, and other suitable materials having viscoelasticity can of course be used. Furthermore,
The cushion may be a normal one having only elasticity, and in such a case, the piano can be prevented from overturning. In addition, the configuration of the details can be changed within the scope of the present invention.

[0018]

As described in detail above, the apparatus for preventing the fall of an upright piano according to the present invention has a simple and inexpensive configuration and does not require any work on walls or the like. This has the effect of preventing the vehicle from falling forward.

[Brief description of the drawings]

FIG. 1 is a rear perspective view of an upright piano incorporating a fall prevention device according to an embodiment of the present invention.

FIG. 2 is a side view showing an installation state of the upright piano of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upright piano 10 Piano body 12 Earthquake fall prevention device 13 Cushion W Wall

Claims (3)

[Claims] 1. An apparatus for preventing an earthquake from falling over an upright piano, wherein a cushion for reducing a repulsive force when the piano body is inclined and hits a rear wall is attached to a back surface of the piano body. . 2. The apparatus according to claim 1, wherein the cushion has viscoelasticity. 3. The apparatus according to claim 2, wherein the cushion is made of a foam material mixed with bituminous material.