JP3062802B2 - 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. 6 is known. The vibration isolator includes an outer housing 31 fixed to the lower surface of the floor plate 30, and a disk-shaped support member positioned in the outer housing 31 and integrally supported by the outer housing 31 and having a flat lower support surface. 33, and a number of small balls 35 circulated freely in a space 34 formed between the outer casing 31 and the support member 33, and the lower small balls 35 roll on the base surface 37. It is made possible.

[0003] When an earthquake or the like occurs, 37
The small ball 35 rolls and circulates in the space 34, so the base surface 37
And the floor plate 30 can be moved relative to each other in any direction, so that the movement of the base surface 37 is hardly transmitted to the floor plate 30.

[0004]

However, in the above-mentioned conventional vibration isolator, even if the base surface 37 moves or vibrates in the horizontal direction due to an earthquake or the like, the floor plate 30 is circulated by the circulation of the small balls 35. It is possible to support stably,
When the floorboard 30 is relatively displaced with respect to the base surface 37, the floorboard 30
Can not be restored to the original position of the base surface 37,
The state where 30 is shifted from the base surface 37 is maintained, which is not preferable.

[0005] The present invention has been made in view of the above-mentioned conventional problems, and when the positions of the upper member and the lower member are relatively shifted, the upper member is returned to the original position with respect to the lower member. The task is to be able to restore.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the feature of the present invention is that a support member 3 is provided.
And a supporting body 1 in which a large number of small balls 6 are provided in a freely circulating manner with the outer housing 5, and by bringing the small balls 6 into rolling contact with the upper member 16 and the lower member 12 , Upper member
In 16 and vibration isolation device the lower member 12 is provided so as to be freely moved relative the restoring means for restoring provided we are the relative displacement of the upper member 16 and lower member 12 to its original position,
The restoring means is provided on the upper member 16 and the lower member 12 side.
The small ball 6 can roll on the ball contact surface 15a11a.
Also, both small ball contact surfaces 15a11a are concave spherical surfaces respectively.
Of the bearing member 3 on which the small balls 6 roll
The upper and lower surfaces are formed as convex spherical surfaces .

A small ball storage space 8 is formed between the bearing member 3 and the outer housing 5, and a large number of small balls 6 are contained in the small ball storage space 8.
Is provided on one of the upper member 16 and the lower member 12, and the plurality of small balls 6 can be rolled on the other member side. In the vibration isolator in which the upper member 16 and the lower member 12 are provided so as to be relatively movable by contacting with each other, the restoration for restoring the relative displacement between the upper member 16 and the lower member 12 to the original position. means provided et al is, the restoring means, the other
The small ball contact surface 15a on the member side is formed as a concave spherical surface, and
And supporting a plurality of small balls 6 contacting the small ball contact surface 15a.
The support surface 3b of the bearing member 3 is formed as a convex spherical surface.
Also, the support body 1 is provided on one of the members so as to be swingable.
Lies in the fact that.

Further, the support body 1 has its support surface 3b facing upward.
Provided on the lower member 12 side so as to be
Preferably, the contact surface 15a is provided on the upper member 16 side .

In addition, the support member 3 is attached to the outer casing 5.
Thus, the small ball 6 is provided so as to be rotatable when circulating .

[0010]

[0011]

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment In FIGS. 1 to 3, reference numeral 1 denotes a support.
Is composed of a support member 3, an outer housing 5 that covers the side and under the support member 3, and a number of small balls 6.

The support member 3 has a substantially disk shape with a center line O as a center and an outer peripheral portion 3a having an arc-shaped convex curved surface, and a columnar fitting portion 5 protrudes downward at a lower portion thereof. Have been.
The support surface 3b which is the upper surface of the support member 3 is formed in a convex and spherical shape having a predetermined radius of curvature. In addition, the support surface 3b
Is on the center line O. Moreover, the lower surface 3c from the outer peripheral portion 3a of the support member 3 to the fitting portion 5 is formed in a tapered shape so as to be inclined downward toward the center.

A concave portion 7 in which the fitting portion 5 of the bearing member 3 is fitted is formed on the inner surface of the outer housing 5 and at the center of the bottom. Here, the fitting portion 5 is fixed to the concave portion 7 by a bolt (not shown), or is supported so as to be freely rotatable about a center line O. In order to facilitate the rotation of the bearing member 3 with respect to the outer housing 5, a spherical convex portion 5a is provided on the lower surface of the fitting portion 5 as shown by an imaginary line in FIG. It is preferable that a concave spherical surface 7a into which the spherical convex portion 5a fits is formed in the concave portion 7 of the body 5.

The inner surface 5c of the outer housing 5 is provided on the support member 3
The outer peripheral portion 3a, the lower surface 3c, and the fitting portion 5 are formed so as to have a fixed interval, and a curved portion is provided between the inner surface 5c of the outer housing 5 and the outer peripheral surface of the support member 3. A small ball storage space 8 composed of 8a, an inclined portion 8b and an annular portion 8c is formed. The small balls 6 are stored in the small ball storage space 8 and the width of the small ball storage space 8 (the distance between the support member 3 and the outer housing 5).
Is set to be slightly larger than the diameter of the small ball 6 so that the small ball 6 can circulate in the small ball storage space 8 in an arbitrary direction.

The upper surface of the outer housing 5 is open so that a plurality of small balls 6 on the support surface 3b of the support member 3 are exposed. The small balls 6 are preferably provided over the entire small ball storage space 8 and the support surface 3b of the support member 3. However, in order to make the circulation movement of the small balls 6 smooth,
The number of small balls 6 is set so that a desired space 6a is formed in 3b.

Reference numeral 10 denotes a spherical projection formed at the lower part of the outer housing 5 and projecting downward at the center, and the spherical part 10 is fixed to the bottom surface of a building room 12 as a lower member. It is fitted from above into a spherical recess 13 formed in the base surface 11 of the base 12a. Therefore, the bearing body 1 can entirely swing in any direction about the spherical projection 10.

Reference numeral 15 denotes a disk-shaped tray centered on a center line O1 fixed to the lower surface of a floor plate 16 as an upper member. The diameter D of the tray is on the support surface 3b exposed from the opening of the outer casing 5. An outer peripheral portion of the bearing member 3 so as to cover the small ball 6 from above.
It is set to be larger than the diameter D1 of 3a. Also, the lower surface (small ball contact surface) 15a of the receiving tray 15 contacts the plurality of small balls 6 from above, and the small ball contact surface 15a has a gap substantially equal to the support surface 3a of the support member 3. Thus, it is formed in a concave spherical surface. The center of the radius of curvature of the spherical surface of the receiving tray 15 is provided on the center line O1.

As shown in FIG. 3, a plurality of vibration isolation devices B having the above configuration are provided at predetermined intervals with respect to the bottom surface of the room 12, and a floor plate 16 on which a heavy object 20 such as a computer is installed. Support horizontally. The floor plate 16 is formed smaller than the size of the room 12. That is, the floor plate 16 is formed to be smaller than the bottom surface of the room 12 by, for example, 10 cm at each side so that the floor plate 16 can relatively move in the horizontal direction with respect to the base surface 11 during an earthquake.

In a normal state in which the room 12 is stationary, the support member 3 is in a vertical state, and its center line O coincides with the center line O1 of the tray 15 (see FIG. 1). At this time,
It is preferable that the centers of the respective radii of curvature of the support surface 3b of the support member 3 and the small ball contact surface 15a of the tray 15 coincide.

Then, when the room 12 moves in the direction of arrow A (rightward in the figure), for example, as shown in FIG.
The plurality of small balls 6 on the support surface 3b of the support member 3 that are in contact with the small ball contact surface 15a of the tray 15 rotate in the directions of the arrows (counterclockwise), respectively, and are opposite to the moving direction of the base surface 11. Try to roll in the direction. For this reason, the small balls 6 in the small ball storage space 8 that are on the left side of the center line O are the small balls 6.
Pressed.

The small ball 6 is a curved portion 8a of the small ball storage space 8.
And rolls on the inner surface 5c of the outer casing 5 through the inclined portion 8b, and further goes around to the right side of the center line O via the annular portion 8c,
Small balls 6 are replenished to the right side of the center line O of the small ball storage space 8 (portion where the density of the small balls 6 becomes low).

Therefore, the base surface 11 and the floor plate 16 move relative to each other due to the circulating movement of the small balls 6.
And the receiving tray 15 are in spherical contact with each other via a plurality of small balls 6, and the outer housing 5 is swingable with respect to the base surface 11, so that the center line O of the support 1 is At the same time, the bearing body 1 is displaced in the horizontal direction with respect to the center line O1 and swings with the center line O inclined. At this time, the floor plate 16 slightly rises, but maintains a horizontal state because it is supported by the plurality of support bodies 1.

Further, since the tray 15 and the support 1 are in contact with each other in a spherical shape through a plurality of small balls 6, a horizontal floor plate is provided.
When a load of 16 is applied to each support 1, the applied load tends to cause the support 1 to swing vertically. Therefore, the small ball 6 on the support surface 3b of the support member 3 rolls in the opposite direction, and
In order to circulate in the small ball storage space 8, the floor plate 16 in a horizontal state moves downward with the force of the lowering of the floor plate 16, and the floor plate 16 relatively moves with respect to the base surface 11 while swinging. The line O and the center line O1 of the tray 15 match again, and the support 1 is restored to the vertical state.

As described above, in the embodiment of the present invention, the support 1 is provided upward, and the small ball 6 and the small ball storage space 8 are covered by the receiving tray 15 from above. 8 can prevent dust and water from inadvertently entering.
It has dust and rust prevention effects.

Further, since the load of the floor plate 16 is received by the plurality of small balls 6 over substantially the entire surface of the support member 3,
For example, when the floor plate 16 is supported by a single ball, a large ball is required and its accuracy is required. However, in the present embodiment, since a plurality of small balls 6 are used, such accuracy is not required. Further, it is possible to disperse the load, and it is possible to suitably prevent damage to the small balls 6 and the saucer 15 and to cope with a large load.

When the bearing member 3 is rotatable with respect to the outer casing 5, the bearing member 3 moves with the movement of the small ball 6.
Is rotated about the center line O, so that the small balls 6 do not become clogged in the small ball storage space 8 and the small balls 6
Circulating movement can be performed smoothly, and the resistance at the time of starting the restoration of the support 1 can be reduced. Note that the present invention is not limited to the above embodiment. For example, in the above embodiment, the tray 15 is provided on the floor plate 16 and the support body 1 is provided on the base surface 11, Can also be provided.

Second Embodiment In the second embodiment shown in FIGS. 4 and 5, in addition to the small ball contact surface 15a of the tray 15, the base surface 11 of the base 12a is also provided as a concave spherical surface. The description of the same configuration as that of the first embodiment is omitted.

That is, the support surface, which is the lower surface 3c of the support member 3, is formed in a convex and spherical shape having the same radius of curvature as the support surface 3b, which is the upper surface. Therefore, unlike the first embodiment, no fitting portion 5 is provided on the lower surface of the support member 3.

Further, the outer housing 5 is also open at the lower surface, and the small balls 6 housed in the small ball storage space 8 formed over the entire surface of the support member 3 can be arbitrarily formed over the entire surface of the support member 3. It can freely circulate in the direction and is also exposed from the lower surface of the outer housing 5. The small balls 6 are substantially filled in the small ball storage space 8 to the extent that they can be circulated.

The base surface 11 of the base 12a is also formed as a concave spherical surface (small ball contact surface 11a) having the same radius of curvature as the small ball contact surface 15a of the tray 15.

Next, a case where the above-mentioned vibration isolator is assembled will be described. First, the outer casing 5 is placed on the base surface 11 of the base 12a. Further, some small balls 6 are stored in the outer casing 5 and laid on the small ball contact surface 11a.

Next, the support member 3 is inserted into the outer housing 5 from the opening on the upper surface of the outer housing 5 and placed on the laid small balls 6, and a predetermined number of small balls 6 are further removed. It is stored in the housing 5.
When the diameter of the opening on the upper surface of the outer housing 5 is smaller than the diameter of the support member 3, the outer housing 5 may be composed of upper and lower members 5a and 5b as shown in FIG.

Further, the tray 15 is placed on the plurality of small balls 6 exposed from the opening on the upper surface of the outer casing 5 to thereby provide the floor plate 16.
Can be hindered horizontally.

In a normal state where the room 12 is stationary, the center line O of the support member 3 is aligned with the center line O 1 of the pan 15 and the base 12.
a coincides with the center line O2 of a. When the room 12 moves, for example, in the direction of arrow A (rightward in the figure) as shown in FIG. 5 during an earthquake, the small ball contact surface 15a of the pan 15 and the base
The plurality of small balls 6 which are in contact with the base surface 11 of 12a try to roll on the surface of the bearing member 3, respectively.

Therefore, the circulation movement of the small balls 6 causes the base surface 11 and the floor plate 16 to move relative to each other. At this time, the support 1 moves, and the small ball contact surface 15a of the tray 15 and the base 12a are moved. Is slightly inclined along the small ball contact surface 11a, and as a result, the elevation of the floor plate 16 can be made smaller than that of the first embodiment.

Further, when the load of the horizontal floor plate 16 acts on the pan 15, the load is applied to the support 1 by the pan 15 and the base 12a.
To move in the direction of the center. Therefore, the small ball 6 rolls in the opposite direction to the above, and the floor plate 16 in a horizontal state moves downward with respect to the base surface 11 due to the force to descend. The center lines O1 and O2 of the tray 15 and the base 12a again coincide with each other, and the support 1 is restored to the vertical state.

The lower surface of the outer housing 5 slides on the small ball contact surface 11a of the base 12a. However, since the outer housing 5 slides more smoothly, both have a small coefficient of friction. It is preferable to use a member made of a material, or to provide a member having a small friction coefficient only at the sliding surfaces of each other.

[0039]

As described above, the vibration isolator according to the present invention is provided with restoring means for restoring the relative displacement between the upper member and the lower member to the original position. When the lower member is displaced by the relative movement, the upper member can be restored to the original predetermined position with respect to the lower member.

For example, if a single ball is to be supported, a large ball is required and its accuracy is required. However, in the present invention, such accuracy is not required because a plurality of small balls are used. In addition, it is possible to disperse the load, and it is possible to suitably prevent damage to the small balls and the contact surfaces of the small balls, and to cope with a large load.

Further, the support is provided on the lower member side so that the support surface thereof is the upper surface, and when the small ball contact surface is provided on the upper member side, the small ball contact surface is provided. Covers the small ball from above, so that dust and the like can be suitably prevented from entering the small ball storage space, and the effects of dust prevention and rust prevention can be obtained.

In the case where the bearing member is provided rotatably with respect to the outer housing when the small balls are circulated,
The circulation movement of the small balls can be performed smoothly, and the upper member can be restored to the lower member with almost no resistance.

Further, the restoring means allows the small balls to roll on the small ball contact surfaces on the upper member and lower member sides,
In addition, when both small ball contact surfaces are formed on concave spherical surfaces, and the upper and lower surfaces of the bearing member on which the small balls roll are formed as convex spherical surfaces, the lower portion of the upper member is It is possible to reduce the vertical movement with respect to the member.

[Brief description of the drawings]

FIG. 1 shows the first embodiment of the present invention, and is a sectional front view before a floor plate and a base surface relatively move.

FIG. 2 is a cross-sectional front view showing a state in which the floor plate and a base surface 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 cross-sectional front view showing a second embodiment of the present invention and before a floor plate and a base surface are relatively moved.

FIG. 5 is a cross-sectional front view showing a state in which the floor plate and the base surface have relatively moved.

FIG. 6 is a sectional front view showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Support body, 3 ... Support member, 3b ... Support surface, 5 ... Outer housing,
6 ... small ball, 8 ... small ball storage space, 12 ... room (lower member),
11: Base surface (small ball contact surface), 15a: Small ball contact surface, 16: Floor plate (upper member)

Claims (4)

(57) [Claims] 1. A bearing (1) having a large number of small balls (6) circulatingly provided between a bearing member (3) and an outer housing (5), said small balls (6). The upper member (16) and the lower member (12 ) are rotatably contacted with each other so that the upper member (16) and the lower member (12) are relatively movable. (16) and the restoring means for restoring provided we are the relative displacement of the lower member (12) to the original position, the restoring means, said upper member (1
6) and the small ball contact surface (15a) (11
a) that the globules (6) are rollable and that both
The small ball contact surfaces (15a) and (11a) are concave spherical surfaces respectively.
And a bearing member on which the small ball (6) rolls
(3) The vibration isolator , wherein the upper and lower surfaces are formed in a convex spherical shape . 2. A small ball storage space (8) is formed between the bearing member (3) and the outer housing (5), and a large number of small balls (6) are provided in the small ball storage space (8). A supporter (1) housed in a freely circulating manner, the supporter (1) being an upper member (1);
An upper member (16) and a lower member (12) are provided on one member side of the lower member (12) and the plurality of small balls (6) in rolling contact with the other member side. ) is in the vibration isolation device is provided to be relatively movable, said upper member (16) and the restoring means for restoring provided we are the relative displacement of the lower member (12) to the original position, the restoring hand
The step is such that the small ball contact surface (15a) on the other member side is concave.
It is formed in a spherical surface and contacts the small ball contact surface (15a).
Surface of a support member (3) for supporting a plurality of small balls (6)
(3b) is formed into a convex spherical surface, and the support (1)
Is provided on one member side so as to be swingable . 3. The support (1) has a support surface (3b).
Is provided on the lower member (12) side so that
The small ball contact surface (15a) is provided on the upper member (16) side.
The vibration isolator according to claim 2, wherein 4. The support member (3) is attached to an outer housing (5).
And it is provided rotatably at the time of circulating movement of the small ball (6).
The vibration isolator according to claim 2 or 3 , wherein: