JP3026768B2 - Vibration isolation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor panel or a building having a heavy object such as a computer attached thereto.
The present invention relates to a vibration isolator that can be freely moved in a horizontal direction.

[0002]

2. Description of the Related Art Conventionally, a vibration isolator shown in FIG. 4 is known. The vibration isolator includes an outer housing 31 fixed to the lower surface of a floor plate 30 as an upper member, and a disk located in the outer housing 31 and integrally supported by the outer housing 31 and having a flat lower support surface. And a plurality of balls 35 circulatingly accommodated in a space 34 formed between the outer housing 31 and the support member 33. The rolling on the surface 37 is enabled.

[0003] When an earthquake or the like occurs, 37
The ball 35 rolls and circulates in the space 34, so the rolling surface
The relative movement between the 37 and the floor plate 30 in an arbitrary direction is made possible, so that the movement on the rolling surface 37 side is hardly transmitted to the floor plate 30.

[0004]

In the above conventional vibration isolator, when the lower member and the floor plate 30 are relatively displaced, the loaded ball 35 rolls on the rolling surface 37.

Normally, a hard ball is adopted as the ball 35, and a load acts on the rolling surface 37 via the ball 35. For this reason, the rolling surface 37 also needs to be a hard material having sufficient durability, and the entire lower member having the rolling surface 37 is made of a hard material and subjected to a surface treatment. As a result, there is a disadvantage that the lower member becomes heavier and its material and manufacturing cost increase.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and a rolling member on which a ball of a vibration isolator rolls is made of a hard material separate from an upper member and a lower member. It is an object of the present invention to improve durability by a load, reduce materials and manufacturing costs, and reduce the weight of an apparatus.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and is characterized in that a large number of balls 6 are provided in an outer housing 5 in a freely circulating manner. In a vibration isolator in which the upper member 15 and the lower member 11 are provided so as to be relatively movable in an arbitrary direction by rollingly contacting the upper member 15 and the lower member 11, the upper member
Rolling members 13 and 17 made of a hard material having wear resistance are provided separately from the upper member 15 and the lower member 11 at rolling portions of the ball 6 in the lower member 15 and the lower member 11. In order to restore the relative displacement between the upper member 15 and the lower member 11 to the original position, the ball-contacting surfaces 13a, 17a on which the ball 6 rolls are formed into concave spherical surfaces. That is to be. Further, the rolling members 13 and 17 are preferably made of a metal plate.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment In FIGS. 1 to 3, reference numeral 1 denotes a vibration isolator, which comprises a support member 3 and a circle in plan view in which the support member 3 is housed. It comprises an outer casing 5 having a shape, a number of hard balls 6, and upper and lower casings 11, 15 as upper and lower members formed by aluminum die casting.

The bearing member 3 has a substantially disk shape with a center line O as the center and an outer peripheral portion 3a having an arcuate convex curved surface. Support surfaces 3b and 3c, which are the upper and lower surfaces of the support member 3,
Are each formed in a convex and spherical shape having a predetermined radius of curvature. The radius of curvature of both support surfaces 3b, 3b is on the center line O.

The inner peripheral surface 5c of the outer casing 5 is formed so as to have a certain distance from the outer peripheral portion 3a of the support member 3 and the upper and lower surfaces 3b, 3c. A ball storage space 8 is formed between the inner peripheral surface 5c and the outer peripheral surface of the support member 3. The balls 6 are housed in the ball storage space 8, and can be circulated while rolling in the ball storage space 8 in an arbitrary direction.

The upper and lower surfaces of the outer housing 5 are open.
The plurality of balls 6 on the support surfaces 3b and 3c of the support member 3 are exposed. The ball 6 is provided over the whole of the ball storage space 8 and the upper and lower support surfaces 3b and 3c of the support member 3.

Reference numeral 10 denotes a rectangular base or the like in plan view fixed to the bottom of the room 22 of the building.
11 is fixed via bolts 12. In addition, a spherical concave portion 11a is formed on the upper surface of the lower casing 11.

Reference numeral 13 denotes a rolling member formed by forming a metal plate made of a hard material (for example, SUS material) having abrasion resistance subjected to a surface treatment such as a quenching treatment into a circular dish shape. The lower casing 11 is fitted and fixed in the spherical concave portion 11a. The upper surface (ball contact surface) 13a of the rolling member 13 is formed in a spherical concave shape, and has a diameter D such that the ball 6 exposed from the opening of the outer housing 5 can be rollably supported from below. The diameter is set to be sufficiently larger than the diameter D1 of the outer peripheral portion 3a of the support member 3. Note that the center of the radius of curvature of the spherical surface of the rolling member 13 is provided on the center line O.

The upper casing 15 is fixed to a base 16 mounted on a lower surface of a support member such as a floor 16a via bolts 19, and has a spherical concave portion 15a formed on the lower surface thereof.

Reference numeral 17 denotes a rolling member formed of a metal plate made of a hard material having wear resistance and subjected to a surface treatment such as quenching treatment, similarly to the rolling member 13 described above. The casing 15 is fitted and fixed in the concave portion 15a. The lower surface (ball contact surface) 17a of the rolling member 17 is formed in a spherical concave shape, and the diameter thereof is set to the same size as that of the rolling member 13. In addition, between the upper and lower casings 11 and 15,
Some gaps are formed so that they can move relative to each other.

Next, a case where the above-mentioned vibration isolator is assembled will be described. First, the lower casing 11 is mounted on the base 10, and the rolling member 13 formed in a dish shape is fitted. Similarly, the upper casing 15 is mounted on the base 16,
A rolling member 17 is fitted to the upper casing 15.

Next, the outer casing 5 is installed on the rolling member 13 of the lower casing 11, the bearing member 3 is stored therein, and after being placed on the laid ball 6, a predetermined number of Is stored in the outer housing 5.

Further, the outer casing 5 is covered with the upper casing 15 so that the rolling member 17 comes into contact with the ball 6. When the vibration isolator 1 having the above configuration is transported or the like, it is preferable that the upper and lower casings 11 and 15 be fixed by means such as bolts so as not to be displaced from each other.

As shown in FIG. 3, a plurality of vibration isolating devices 1 having the above-described configuration are provided at predetermined intervals with respect to the bottom surface of a room 22, and a floor on which a heavy object 20 such as a computer is installed.
16a is supported horizontally. The floor 16 a is formed smaller than the size of the room 12. That is, the floor 16a is moved by 10 cm on each side so that the floor 16a can move relative to the bottom of the room 22 in an arbitrary horizontal direction during an earthquake.
12 is formed smaller than the bottom surface.

In a normal state in which the room 12 is stationary, the center line of the support member 3 and the center of the driven member 13 coincide with each other and are on the center line O. (See FIG. 1).

Then, when the room 12 moves in the direction of arrow A (left direction in the figure) as shown in FIG.
The plurality of balls 6 include a ball storage space 8 and a lower casing.
The ball contact surfaces of the rolling member 13 of FIG. 11 and the rolling member 17 of the upper casing 15 circulate while rolling, and the circulating movement of the ball 6 relatively moves the bottom surface of the room 22 and the floor 16a. . At this time, the outer casing 5 includes the upper and lower casings 11,
Although it will be slightly inclined along the ball contact surfaces 13a, 17a between 15, the rise of the floor plate 16 can be reduced.

Furthermore, the load on the horizontal floor 16a is
When acting on 15, the applied load tends to move the outer casing 5 to the center line O side. Accordingly, the ball 6 rolls in the opposite direction to the above, and the center of the outer housing 5 and the upper and lower casings 13 and 15 are moved.
Center on the center line O again.

As described above, since the upper casing 15 and the lower casing 11 are provided with the hard rolling members 13 and 17 which are separate from the upper casing 15 and the lower casing 11, respectively. 13 and 17 hardly deform or wear.

The upper casing 15 and the lower casing 11
Is made of aluminum material, it can be made lightweight, and handling such as transportation of the vibration isolator 1 becomes easy,
Although convenient and preferable, the materials of the upper casing 15 and the lower casing 11 may be other materials.

Moreover, even if each of the rolling members 13 and 17 is worn out, only the rolling members 13 and 17 need to be replaced, and the entire upper casing 15 and lower casing 11 need to be replaced. As compared with the case where the maintenance is performed, there is an advantage that the maintenance is facilitated and the cost is reduced.

Furthermore, the vibration isolator 1 can be used to support the entire building, and is not particularly limited.

[0027]

As described above, in the vibration isolator according to the present invention, the rolling members made of a hard material having wear resistance are provided at the rolling portions of the balls in the upper member and the lower member. In order to restore the relative displacement between the upper member and the lower member to the original position, the ball contact surface on which the ball rolls is formed as a concave spherical surface. The moving member has durability against a load, and when heat treatment is performed, only the driven member using a hard material is sufficient, so that the cost required for heat treatment is significantly reduced, and thus There is an advantage that a product having a load capacity and durability can be provided at low cost.

Further, the upper member and the lower member on which the rolling members are provided can be made of a lightweight material such as aluminum, and the weight of the vibration isolator can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional front view showing a first embodiment of the present invention and before a floorboard and a room relatively move.

FIG. 2 is a cross-sectional front view showing a state where the floorboard and the room have relatively moved.

FIG. 3 shows a state in which a support body is attached to a floor plate, and (a)
Is a sectional front view, and (b) is a sectional plan view.

FIG. 4 is a sectional front view showing a conventional example.

[Explanation of symbols]

3 ... Support member, 5 ... Outer housing, 6 ... Ball, 11 ... Lower casing (lower member), 13, 17 ... Rolled member, 13a, 17a ...
Ball contact surface, 16: Base floor plate (upper member), 15: Upper casing (upper member)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16M 5/00-7/00 B65G 7/04 A47B 91/00

Claims (2)

(57) [Claims] A large number of balls (6) are provided in an outer housing (5) in a freely circulating manner, and the balls (6) are attached to an upper member (15).
The upper member (15) and the lower member (11) are provided in such a manner that the upper member (15) and the lower member (11) are relatively freely movable in any direction by rolling contact with the lower member (11). The rolling part of the ball (6) in the lower member (11) includes the upper member (15) and the lower member (11).
And rolling members (13) and (17) made of a hard material having wear resistance separately from the rolling members (13) and (17).
(17) The ball contact surfaces (13a) and (17a) on which the ball (6) rolls in order to restore the relative displacement between the upper member (15) and the lower member (11) to the original position. Is formed on a concave spherical surface. 2. The vibration isolator according to claim 1, wherein the rolling members (13) and (17) are made of a metal plate.