JP2000249188A - Base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation device equipped with an upper member, an intermediate member supporting the upper member with possibility of relative movement in Y-direction through a first roller and a lower member to support the intermediate member with possibility of relative movement in the X-direction through a second roller, whereby execution of works with the base isolation device is facilitated and the rollers are precluded from hopping out or the apparatus and/or structure is prevented from tumbling even if an earthquake to a degree beyond anticipation has occurred. SOLUTION: An upper member 1 and an intermediate member 2 are provided with holes 1c and 2c in which a first roller 4 can roll and thereby coupled together by threading the first roller 4 through the two holes 1c and 2c, while the intermediate member 2 and a lower member 3 are provided with holes 2g and 3c in which a second roller 5 can roll and are coupled together by threading a second roller 5 through the holes 2g and 3c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a seismic isolation device having a rollable roller.

[0002]

2. Description of the Related Art Generally, a seismic isolation device of this type is connected to an upper member connected to equipment or a structure of a building, and to a foundation or the like, as disclosed in Japanese Patent Application Laid-Open No. 10-61250. A lower member, and an intermediate member provided between the upper member and the lower member. A first roller extending in a first horizontal direction is disposed between the upper member and the intermediate member, and the first roller is disposed between the intermediate member and the lower member.
And a second roller extending in a horizontal second direction perpendicular to the second direction. That is, the intermediate member supports the upper member so as to be relatively movable in the second direction via the first roller, and the lower member relatively supports the intermediate member in the first direction via the second roller. It is movably supported.

The lower surface of the upper member is formed so as to be inclined downward from the center of the lower surface in the second direction toward both ends, while the upper surface of the intermediate member is the second surface of the upper surface. Is formed so as to incline upward from the center of the direction toward both ends. The lower surface of the intermediate member is formed so as to be inclined downward from the center of the lower surface in the first direction toward both ends, while the upper surface of the lower member is formed in the first direction of the upper surface. It is formed so as to be inclined upward from the center toward both ends. Thus, a seismic isolation effect can be obtained for horizontal vibrations in all directions, and a restoring force can be applied to the first and second rollers.

[0004]

However, in the above conventional apparatus, since the upper member, the intermediate member and the lower member are not connected to each other, the work of installing the seismic isolation device is difficult, and the seismic intensity is larger than expected. When the earthquake occurs, there is a problem that the roller jumps out from between the members. On the other hand, it is conceivable to provide a stopper that regulates the rolling of the roller so that the roller does not jump out.However, when the roller comes into contact with the stopper, a device or a structure placed on the upper surface of the upper member is removed. If the position of the center of gravity is considerably high, there is a problem that the device, structure or the like falls down together with the upper member due to inertial force.

The present invention has been made in view of the above points, and an object of the present invention is to improve the configuration of a seismic isolation device having a rollable roller as described above. Accordingly, the construction work can be easily performed, and even if an earthquake with a seismic intensity larger than expected occurs, it is possible to prevent the rollers from jumping out and the devices and structures from falling down.

[0006]

In order to achieve the above object, according to the present invention, a roller rolling hole in which a first roller can roll is provided in an upper member and an intermediate member. The upper member and the intermediate member are joined by inserting the first roller into the rolling holes, and the intermediate member and the lower member are provided with roller rolling holes in which the second roller can roll.
The intermediate member and the lower member are joined by inserting the second roller through the roller rolling holes.

More specifically, according to the first aspect of the present invention, the upper member and the horizontal roller perpendicular to the first direction are connected via the first roller extending in the horizontal first direction. An intermediate member that supports the intermediate member so as to be relatively movable in two directions,
The first roller extends through the second roller extending in the second direction.
And a lower member that is supported to be relatively movable in the direction of.

The upper member includes an upper member main body provided above the first roller, a support extending downward from the upper member main body, and the first roller inserted through the support. And a roller rolling hole opened so as to be rollable in the second direction, wherein the intermediate member includes an intermediate member main body provided between the first and second rollers, An upper support portion extending upward from the intermediate member main body; and an upper roller rolling hole through which the first roller is inserted and which is opened to be able to roll in the second direction. A lower supporting portion extending downward from the intermediate member main body, and a lower roller having the second supporting roller inserted through the lower supporting portion and opened so as to be rollable in the first direction. A rolling hole, and the lower member is provided below the second roller. A lower member main body, a support portion extending upward from the lower member main body, and an opening through which the second roller is inserted and which can roll in the first direction. The upper surface of the roller rolling hole of the upper member and the lower surface of the upper roller rolling hole of the intermediate member are brought into contact with the first roller in the second direction. A rolling surface that rolls, at least one of the two rolling surfaces is inclined toward the first roller in the vertical direction from the center in the second direction of the rolling surface toward both ends, The upper surface of the lower roller rolling hole of the intermediate member and the lower surface of the roller rolling hole of the lower member are rolling surfaces that contact the second roller and roll in the first direction, At least one of the two rolling surfaces is formed in a vertical direction from the center in the first direction of the rolling surface toward both ends. It assumed to be inclined to the roller side.

According to the above configuration, when an earthquake occurs, the first roller rolls between the upper surface of the roller rolling hole of the upper member and the lower surface of the upper roller rolling hole of the intermediate member, and the second roller rotates between the intermediate roller and the lower roller. By rolling between the upper surface of the lower roller rolling hole of the member and the lower surface of the roller rolling hole of the lower member, a seismic isolation effect is obtained for horizontal vibration in all directions. At least one of the rolling surfaces of the roller rolling hole of the upper member and the upper roller rolling hole of the intermediate member is the first in the vertical direction from the center in the second direction of the rolling surface toward both ends. And at least one of the rolling surfaces of the lower roller rolling hole of the intermediate member and the roller rolling hole of the lower member is located at both ends from the center of the rolling surface in the first direction. Since it is inclined toward the second roller in the up-down direction, a restoring force can be applied to the first and second rollers. Then, by inserting the first roller through the roller rolling hole of the upper member and the upper roller rolling hole of the intermediate member, the upper member and the intermediate member are joined if the first roller is prevented from falling out. When the second roller is inserted through the lower roller rolling hole of the intermediate member and the roller rolling hole of the lower member so that the second roller does not come off, the intermediate member and the lower member can be moved downward. The side member can be connected. As a result, the upper member, the intermediate member, and the lower member can be previously combined and integrated, and the work of installing the seismic isolation device can be facilitated. In addition, even if an earthquake with a seismic intensity larger than expected occurs, the first and second rollers come out of each member by the first and second rollers coming into contact with the ends of the roller rolling holes. In addition, it is possible to prevent a device, a structure, and the like placed on the upper surface of the upper member main body of the upper member from falling down at the time of the contact.

According to a second aspect of the present invention, in the first aspect of the invention, the upper member has two support portions provided at both ends of the first roller, respectively, and the intermediate member is It has two upper support portions provided so as to be located near both support portions of the upper member, and two lower support portions provided so as to be located at both ends of the second roller, respectively. The lower member has two support portions provided so as to be located in the vicinity of both lower support portions of the intermediate member, respectively. Thus, the intermediate member can stably support the upper member, and the lower member can stably support the intermediate member.

According to a third aspect of the present invention, in the second aspect of the present invention, the upper member, the intermediate member, and the lower member are each formed of one plate. By doing so, the upper member, the intermediate member, and the lower member can be easily manufactured.

According to the fourth aspect of the present invention, the first, second or third aspect of the present invention is provided.
In the invention, the first roller is provided with a small-diameter portion having a smaller diameter than other portions at a portion that comes into contact with both rolling surfaces of the roller rolling hole of the upper member and the upper roller rolling hole of the intermediate member. The second roller has a small-diameter portion having a smaller diameter than other portions at a portion that comes into contact with both rolling surfaces of the lower roller rolling hole of the intermediate member and the roller rolling hole of the lower member. It is assumed that

Thus, it is not necessary to separately attach a retaining member to the first and second rollers, and the first roller can be surely rolled in the second direction without shifting the first roller in the first direction. The second roller can be reliably rolled in the first direction without shifting the second roller in the second direction.

According to a fifth aspect of the present invention, in the invention of the fourth aspect, both side surfaces in the first direction of the small diameter portion of the first roller are inclined outward in the first direction of the small diameter portion toward the outside in the radial direction. It is assumed that both side surfaces of the small diameter portion of the second roller in the second direction are tapered surfaces that incline outward in the radial direction toward the outside in the second direction of the small diameter portion.

[0015] With this configuration, the both sides of the small diameter portion of the first roller in the first direction do not come into contact with the both sides of the support portion of the upper member and the upper support portion of the intermediate member in the first direction. The first roller easily rolls in the second direction,
Similarly, the lower support portion of the intermediate member and the lower support portion of the lower member do not come into surface contact with both side surfaces in the second direction of the small diameter portion of the second roller. The roller easily rolls in the first direction.

According to the invention of claim 6, in claims 1, 2, 3,
In the invention of 4 or 5, the first roller rolls in the second direction at least between the upper member main body and the first roller and between the intermediate member main body and the first roller. Sometimes, a first rubber elastic body that comes into contact with the first roller is provided, and at least one of between the intermediate member main body and the second roller and between the lower member main body and the second roller,
It is assumed that a second rubber elastic body is provided which extends in the first direction and comes into contact with the second roller when the second roller rolls. According to the present invention, the damping force can be applied by the first and second rubber elastic bodies when rolling on the first and second rollers, respectively.

According to a seventh aspect of the present invention, in the sixth aspect of the present invention, an engaging recess engageable with the first roller is formed at a central portion in the second direction on the roller contact surface of the first rubber elastic body. The first rubber elastic body has a first
It is assumed that an engaging recess engageable with the second roller is formed at the center in the direction of.

With this arrangement, the first and second rollers can be initially positioned by the engagement recesses of the rubber elastic body, and the wind or the like acts on the devices and structures placed above the upper member. When this is done, the first and second rollers can be prevented from rolling, and the device or structure can be prevented from swaying due to wind or the like.

According to an eighth aspect of the present invention, in the invention of the sixth or seventh aspect, the first rubber elastic member is provided at both ends in the second direction with a rolling restricting portion for restricting the rolling of the first roller. And at both ends of the second rubber elastic body in the first direction,
It is assumed that a rolling restricting portion for restricting the rolling of the second roller is provided.

Thus, when an earthquake with a seismic intensity larger than expected occurs, the rolling restricting portions of the first and second rubber elastic members serve as stoppers of the first and second rollers, respectively, and are brought into contact therewith. The impact at the time can be reduced.

[0021]

(Embodiment 1) FIGS. 1 to 6 show a seismic isolation device according to Embodiment 1 of the present invention. The seismic isolation device comprises an upper member 1 and a lower portion of the upper member 1. A lower member 3 provided on the side, and an intermediate member 2 provided between the upper member 1 and the lower member 3 are provided. A first roller 4 extending in the horizontal X direction (first direction) is disposed between the upper member 1 and the intermediate member 2, and the intermediate member 2 and the lower member 3
A second roller 5 extending in a horizontal Y direction (second direction) perpendicular to the X direction is provided between the second roller 5 and the second roller 5.

The upper member 1 has an upper member main body 1a which is provided above the first roller 4 and is substantially rectangular in plan view and connected to equipment or a structure of a building. 1a, the upper member main body 1 is located at both ends of the first roller 4 so as to be located at both ends of the first roller 4, respectively.
The two support parts 1b, 1b extending downward from a are provided. The upper member 1 is formed of one plate, and both support portions 1b, 1b are formed by bending both ends of the plate in the X direction downward. Elongated roller rolling holes 1c, 1c are formed in the support portions 1b, 1b, respectively, so that the first roller 4 can be inserted therein and can be rolled in the Y direction.

The intermediate member 2 has a substantially rectangular intermediate member body 2a in plan view provided between the first and second rollers 4 and 5, and both ends of the intermediate member body 2a in the X direction. Are provided with two upper support portions 2b, 2b extending upward from the intermediate member main body 2a so as to be located near the inner sides of both support portions 1b, 1b of the upper member 1, respectively. This intermediate member 2 also has a 1
And two upper supporting portions 2b, 2
b is formed by bending both ends in the X direction of the plate material upward. Elongated upper roller rolling holes 2c, 2c are formed in both upper supporting portions 2b, 2b so that the first roller 4 can be inserted and roll in the Y direction.

The upper surface of each roller rolling hole 1c of the upper member 1 and the lower surface of each upper roller rolling hole 2c of the intermediate member 2 are in contact with the first roller 4 and roll in the Y direction. The upper member 1 of the two rolling surfaces 1d, 2d is located on the lower side (first in the vertical direction) from the center in the Y direction of the rolling surface 1d toward both ends. Roller 4
The intermediate member 2 is formed so as to be inclined upward to the upper side (in the vertical direction, the first roller 4 side in the vertical direction) from the center in the Y direction of the rolling surface 2d toward both ends. )
It is formed in a downwardly convex arc shape so as to be inclined.

The first roller 4 is provided with each roller rolling hole 1c of the upper member 1 and each upper roller rolling hole 2c of the intermediate member 2.
c (4 places) in contact with both rolling surfaces 1d and 2d
It has a small-diameter portion 4b whose diameter is smaller than other portions (referred to as a large-diameter portion 4a). As shown in the enlarged view of FIG. 6, both side surfaces in the X direction of each of the small diameter portions 4 b are tapered surfaces 4 c inclined outward in the X direction of the small diameter portions 4 b toward the outside in the radial direction.
It has been.

The lower surface of each roller rolling hole 1c of the upper member 1 is in contact with the rolling surface 1d of the roller rolling hole 1c.
The roller 4 is formed in an arc shape along the rolling surface 1d so as to have an interval slightly larger than the diameter of the small diameter portion 4b. Also, the upper surface of each upper roller rolling hole 2c of the intermediate member 2 has a space slightly larger than the rolling surface 2d of the upper roller rolling hole 2c and the diameter of the small diameter portion 4b of the first roller 4. It is formed in an arc shape along the rolling surface 2d. Further, both ends in the Y direction of each roller rolling hole 1c of the upper member 1 and each upper roller rolling hole 2c of the intermediate member 2 are arcs whose radius is slightly larger than the radius of the small diameter portion 4b of the first roller 4. It is composed of planes.

The lower part of the roller rolling hole 1c of the upper member 1 and the central part in the Y direction on the upper surface of the upper roller rolling hole 2c of the intermediate member 2 are slightly smaller than the large diameter part 4a of the first roller 4. Insertion recesses 1e and 2e are provided so that holes having a large diameter are formed in the insertion recesses 1e and 2e.
The first roller 4 can be inserted into the roller rolling hole 1c of the upper member 1 and the upper roller rolling hole 2c of the intermediate member 2 through the holes formed by e and 2e. The two rolling surfaces 1d, 2d are the first rollers 4
When the first roller 4 abuts on the tapered surface 4c, which is both sides in the X direction of the small diameter portion 4b, the first roller 4 supports the support portion 1b of the upper member 1 and the upper support portion 2b of the intermediate member 2.
When the first roller 4 rolls in the Y direction, the tapered surface 4c serves as a guide when the first roller 4 rolls in the Y direction. Will be. Therefore, the intermediate member 2 is
The upper support portions 2b, 2b support the support portions 1b, 1b of the upper member 1 via the first roller 4 so as to be relatively movable in the Y direction.

Two lower support portions 2f extending downward from the intermediate member main body 2a so as to be located at both ends of the second roller 5 in the Y direction of the intermediate member main body 2a of the intermediate member 2 respectively. , 2f are provided. The two lower support portions 2f, 2f are formed by bending both ends in the Y direction of the plate material constituting the intermediate member 2 downward. Elongated lower roller rolling holes 2g, 2g are formed in the lower supporting portions 2f, 2f, respectively, so that the second roller 5 is inserted therein and can be rolled in the X direction. ing.

The lower member 3 has a substantially rectangular lower member body 3a in plan view, which is provided below the second roller 5 and is connected to a foundation or the like. Two support portions 3b, 3b extending upward from the lower member main body 3a are provided at both ends in the Y direction of 3a so as to be located near the outer sides of both lower support portions 2g, 2g of the intermediate member 2, respectively. ing. The lower member 3 is also formed of one plate material, and both support portions 3b, 3b are formed by bending both ends of the plate material in the Y direction upward. The second roller 5 is attached to both support portions 3b.
Are inserted and the roller rolling holes 3c, 3c in the form of long holes are respectively opened so as to be able to roll in the X direction.

Each lower roller rolling hole 2g of the intermediate member 2
And the lower surface of each roller rolling hole 3c of the lower member 3 are rolling surfaces 2h and 3d which contact the second roller 5 and roll in the X direction. The intermediate member 2 of the surfaces 2h and 3d is located on the lower side (the second roller 5 in the vertical direction) from the center in the X direction of the rolling surface 2h toward both ends.
The intermediate member 2 is formed so as to incline toward the upper side so as to be inclined upward (toward the second roller 5 in the vertical direction) from the center in the X direction of the rolling surface 3d toward both ends. )
It is formed in a downwardly convex arc shape so as to be inclined.

The second roller 5 has a lower roller rolling hole 2g of the intermediate member 2 and a lower roller rolling hole 3g of the lower member 3.
c (4 places) in contact with both rolling surfaces 2h and 3d,
It has a small-diameter portion 5b whose diameter is smaller than other portions (referred to as a large-diameter portion 5a). Like the first roller 4, both side surfaces in the Y direction of the small diameter portion 5b are tapered surfaces inclined outward in the X direction of the small diameter portion 4b toward the outside in the radial direction.

The lower surface of each lower roller rolling hole 2g of the intermediate member 2 is in contact with the rolling surface 2g of the lower roller rolling hole 2g.
h and the second roller 5 are formed in an arc shape along the rolling surface 2h so as to have an interval slightly larger than the diameter of the small diameter portion 5b of the second roller 5. The upper surface of each roller rolling hole 3c of the lower member 3 is formed such that there is an interval slightly larger than the rolling surface 3d of the roller rolling hole 3c and the diameter of the small diameter portion 5b of the second roller 5. It is formed in an arc shape along the rolling surface 3d. Further, both ends in the Y direction of each lower roller rolling hole 2g of the intermediate member 2 and each roller rolling hole 3c of the lower member 3 have a radius slightly smaller than the radius of the small diameter portion 5b of the second roller 5. It is composed of a large arc surface.

Each lower roller rolling hole 2 of the intermediate member 2
The large-diameter portion 5a of the second roller 5 is located at the center in the X direction on the lower surface of the roller g and the upper surface of each roller rolling hole 3c of the lower member 3.
Insertion recesses 2i and 3e are provided so as to form holes having a slightly larger diameter than the second roller 5 through the holes formed by the insertion recesses 2i and 3e. Can be inserted into each lower roller rolling hole 2g and each roller rolling hole 3c of the lower member 3. When the two rolling surfaces 2h and 3d come into contact with the small-diameter portion 5b of the second roller 5, the second roller 5 is moved in the same manner as the first roller 4 by the roller rolling holes 2g and 3c.
And the tapered surfaces on both sides in the Y direction of the small diameter portion 5b serve as a guide when the second roller 5 rolls in the X direction. Therefore, the lower member 3 is supported by the intermediate members 2 at the support portions 3b, 3b.
Are supported via the second roller 5 so as to be relatively movable in the X direction.

The upper member 1 and the lower member 3 have the same shape, and the first roller 4 and the second roller 5 have the same shape.

As described above, in the first embodiment, by inserting the first roller 4 into each roller rolling hole 1c of the upper member 1 and each upper roller rolling hole 2c of the intermediate member 2, the upper member 1 and the intermediate member 2, the lower roller rolling hole 2 g and the lower member 3
By inserting the second roller 5 into the roller rolling hole 3c, the intermediate member 2 and the lower member 3 can be connected. As a result, the upper member 1, the intermediate member 2, and the lower member 3
Can be combined in advance and integrated, which facilitates the work of installing the seismic isolation device. Before the installation, the support portion 1b of the upper member 1 and the upper support portion 2b of the intermediate member 2 are fixed so as not to be relatively movable in the Y direction by screws or the like. If the supporting portion 3b of the lower member 3 is fixed so as not to be relatively movable in the X direction by a screw or the like, the construction work is further facilitated, and the screw or the like may be removed after the construction.

When an earthquake occurs, as shown in FIGS. 7 and 8, the first roller 4 rotates in both the roller rolling holes 1 c of the upper member 1 and the upper roller rolling holes 2 c of the intermediate member 2. The upper member 1 and the intermediate member 2 roll between the moving surfaces 1d and 2d.
Are relatively moved in the Y direction, and the second roller 5 is
Between the rolling surfaces 2h and 3d of the lower roller rolling holes 2g and the roller rolling holes 3c of the lower member 3, respectively.
And the lower member 3 relatively move in the X direction. At this time, the first roller 4 can be reliably rolled in the Y direction without shifting in the X direction by the tapered surface 4c in the small diameter portion 4b of the first roller 4, and the tapered surface 4c
The contact between the support portions 1b and 2b in the X direction can be prevented and the rolling can be performed smoothly. The same applies to the second roller 5. As a result, an excellent seismic isolation effect is obtained for horizontal vibrations in all directions.
The rolling surfaces 1d and 2d of the roller rolling hole 1c of the upper member 1 and the upper roller rolling hole 2c of the intermediate member 2 are vertically moved from the center in the Y direction of the rolling surfaces 1d and 2d toward both ends. In the direction of the first roller 4 side, the lower roller rolling hole 2g of the intermediate member 2 and the roller rolling hole 3c of the lower member 3
Are inclined toward the second roller 5 in the vertical direction from the center in the X direction of the rolling surfaces 2h, 3d toward both ends, so that the first and second rollers 2h, 3d 4,
5 can be given a restoring force. Furthermore, even if an earthquake with a seismic intensity larger than expected occurs, the first roller 4 is an arc at the end in the Y direction of each roller rolling hole 1c of the upper member 1 or each upper roller rolling hole 2c of the intermediate member 2. By contacting the surface, the first roller 4 can be prevented from jumping out from between the upper member 1 and the intermediate member 2. Similarly, the second roller 5 is connected to the lower roller rolling hole 2 g of the intermediate member 2 or the X in each roller rolling hole 3 c of the lower member 3.
The second roller 5 can be prevented from jumping out from between the intermediate member 2 and the lower member 3 by contacting the arc surface at the end in the direction. In addition, even if the contact is performed in this manner, devices, structures, and the like placed on the upper surface of the upper member main body 1a of the upper member 1 will not fall with the upper member 1.

(Embodiment 2) FIG. 9 shows Embodiment 2 of the present invention.
(Note that in the following embodiments, the same parts as those in FIGS. 1 to 6 are denoted by the same reference numerals and detailed description thereof is omitted), and the intermediate member 2 is formed by two upper plate members 2m and a lower plate member. 2
n and the first and second rollers 4 and 5 are different from the first embodiment in that the small-diameter portions 4b and 5b of the first and second rollers 4 and 5 are eliminated.

That is, in this embodiment, the intermediate member 2
Is formed by laminating an upper plate 2m and a lower plate 2n having the same shape with each other in a state where the bent portions are shifted by 90 ° and the top and bottom are inverted.
a is composed of a portion where an upper plate 2m and a lower plate 2n are bonded to each other, the upper supports 2b, 2b are composed of an upper plate 2m, and the lower supports 2f, 2f are composed of a lower plate 2n. I have.

The first and second rollers 4 and 5 have the same diameter over the entire length thereof, and each roller rolling hole 1c of the upper member 1 and each upper roller rolling hole of the intermediate member 2. The interval between the upper and lower surfaces of the lower roller 2c is slightly larger than the diameter of the first roller 4 and the upper and lower surfaces of the lower roller rolling holes 2g of the intermediate member 2 and the respective roller rolling holes 3c of the lower member 3. The interval between
It is formed slightly larger than the diameter of the second roller 5.
At both ends of the first roller 4 (outside the roller rolling holes 1c, 1c of the upper member 1), each roller rolling hole 1c of the upper member 1 and each upper roller rolling hole 2c of the intermediate member 2 are provided. Retaining members 6 and 6 having a diameter larger than the distance between the upper and lower surfaces of the retaining members
Are respectively fixed by screws 8, 8. Similarly, both ends of the second roller 5 (the roller rolling holes 3 of the lower member 3).
c, 3c), retaining members 6 and 6 having a diameter larger than the distance between the upper and lower surfaces of each lower roller rolling hole 2g of the intermediate member 2 and each roller rolling hole 3c of the lower member 3. Are fixed by screws 8, 8, respectively. Each of the retaining members 6 has a structure in which the first roller 4 has the roller rolling holes 1c and 2c.
The second roller 5 is attached after being inserted into the roller rolling holes 2g and 3c, and the first roller 4 is moved in the Y direction by the respective retaining members 6 without falling out of the roller rolling holes 1c and 2c. The second roller 5 rolls and the roller rolling hole 2
Rolls in the X direction without falling out of g, 3c. In addition, on the lower surface of the roller rolling hole 1c of the upper member 1 and the center in the Y direction on the upper surface of the upper roller rolling hole 2c of the intermediate member 2,
The insertion recesses 1 e and 2 e as in the first embodiment are not formed, and X on the lower surface of each lower roller rolling hole 2 g of the intermediate member 2 and the upper surface of each roller rolling hole 3 c of the lower member 3. The insertion recesses 2i and 3e are not formed at the center in the direction.

Therefore, in the second embodiment, similarly to the first embodiment, the upper member, the intermediate member, and the lower member can be combined and integrated, and the construction can be easily performed. In addition, even if an earthquake with a seismic intensity larger than expected occurs, it is possible to prevent the first and second rollers 4 and 5 from jumping out and the devices and structures from falling down.

(Embodiment 3) FIG. 10 shows Embodiment 3 of the present invention, in which first and second rubber elastic bodies 11 and 12 are fixed to upper and lower surfaces of an intermediate member main body 2a of an intermediate member 2, respectively. Is different from the first embodiment.

That is, in this embodiment, the first roller 4 extends in the Y direction between the intermediate member main body 2a and the first roller 4 when the first roller 4 rolls. While the first rubber elastic body 11 that contacts the central portion is provided, the first rubber elastic body 11 extends between the intermediate member main body 2a and the second roller 5 in the X direction and when the second roller 5 rolls. A second rubber elastic body 12 is provided in contact with a central portion of the second roller 5 in the axial direction. That is, the first roller 4
When the roller rolls, it rolls while bending the upper surface (roller contact surface) of the first rubber elastic body 11, and when the second roller 5 rolls, the lower surface (roller Rolling while bending the contact surface).

In the center of the upper surface of the first rubber elastic body 11 in the Y direction, the radius of the first roller 4 in contact with the first rubber elastic body 11 when viewed from the X direction (the center in the axial direction). An arcuate engaging recess 11a, which is slightly larger than the radius of the large diameter portion 4a) and is engageable with the large diameter portion 4a, is formed. In the initial position, the first roller 4 is engaged with the engaging recess 11a. Is engaged. On the other hand, the second rubber elastic body 12
The radius of the second roller 5 at the center in the X direction on the lower surface of the lower surface of the second roller 5 is slightly smaller than the radius of the contact portion of the second roller 5 with the second rubber elastic body 12 (the large-diameter portion 5a at the center in the axial direction). Arc-shaped engaging recess 1 which is large and can be engaged with the large-diameter portion 5a.
2a are formed, and the second roller 5 is engaged with the engagement concave portion 12a at the initial position.

Further, Y in the first rubber elastic body 11
At both ends in the direction, rolling restricting portions 11b, 11b for restricting the rolling of the first roller 4 are provided.
Rolling regulating portions 12b, 12b for regulating the rolling of the second roller 5 are provided at both ends in the X direction in FIG.
That is, before the first roller 4 comes into contact with the Y-direction end of each roller rolling hole 1c of the upper member 1 or each upper roller rolling hole 2c of the intermediate member 2, the first rubber elastic body 11 Before coming into contact with the rolling restricting portion 11b, the second roller 5 is brought into contact with the X-direction end of each lower roller rolling hole 2g of the intermediate member 2 or each roller rolling hole 3c of the lower member 3. , Second
Abuts against the rolling restricting portion 12b of the rubber elastic body 12. Note that the first and second rubber elastic bodies 11,
Numerals 12 have the same shape.

Therefore, in the third embodiment, when rolling on the first and second rollers 4 and 5, damping force is applied by the first and second rubber elastic bodies 11 and 12, respectively. it can. Further, the first and second rubber elastic bodies 1
By engaging the first and second rollers 4 and 5 with the engagement recesses 11a and 12a provided in the first and second rollers 12, the initial positioning of the first and second rollers 4 and 5 can be performed. The first and second rollers 4 and 5 can be prevented from rolling even if the wind or the like acts on the device or structure placed on the upper side of the upper member main body 1a. Rolling of the structure can be prevented. Further, when an earthquake with a seismic intensity higher than expected occurs, the rolling of the first and second rollers 4 and 5 is controlled by the rolling restricting portions 11b and 12b of the first and second rubber elastic bodies 11 and 12. To regulate,
The end in the Y direction of each roller rolling hole 1c of the upper member 1 or each upper roller rolling hole 2c of the intermediate member 2 or each lower roller rolling hole 2g of the intermediate member 2 or each roller rolling of the lower member 3. The impact at the time of contact can be reduced as compared with the case where the end is restricted by the X-direction end of the hole 3c.

In the third embodiment, the first rubber elastic body 11 is provided between the intermediate member main body 2a and the first roller 4, and the second rubber elastic body 12 is connected to the intermediate member main body 2a.
Although the first rubber elastic body 11 may be provided between the upper member main body 1a and the first roller 4, the first rubber elastic body 11 may be provided between the upper member main body 1a and the first roller 4. 4 and between the intermediate member main body 2 a and the first roller 4. Similarly, the second rubber elastic body 12
May be provided between the lower member main body 3a and the second roller 5, and between the intermediate member main body 2a and the second roller 5 and between the lower member main body 3a and the second roller 5. You may make it provide in both.

In each of the first to third embodiments, the rolling surfaces 1d, 2d of the roller rolling holes 1c of the upper member 1 and the upper roller rolling holes 2c of the intermediate member 2 are replaced with the rolling surfaces. 1d,
Although 2d is formed so as to be inclined toward the first roller 4 in the vertical direction from the center in the Y direction to both end sides, it is also possible to make only one of them so as to be substantially horizontal.

[0048]

As described above, according to the seismic isolation device of the present invention, the first roller extending in the first horizontal direction is inserted into the support portion of the upper member and is perpendicular to the first direction. A roller rolling hole is provided so as to be able to roll in the second horizontal direction, and the first roller is inserted into the upper support portion of the intermediate member, and is capable of rolling in the second direction. An upper roller rolling hole, a second roller extending in the second direction is inserted into a lower support portion of the intermediate member, and the first roller
A lower roller rolling hole is provided so as to be able to roll in the direction of, and the second roller is inserted into a support portion of the lower member so that the roller can be rolled in the first direction. A rolling hole provided with a rolling hole, wherein the first roller contacts the upper surface of the roller rolling hole of the upper member and the lower surface of the upper roller rolling hole of the intermediate member to roll in the second direction; As a surface, at least one of the two rolling surfaces is inclined toward the first roller in the vertical direction from the center in the second direction of the rolling surface toward both end sides, and the lower roller rolling of the intermediate member is performed. The upper surface of the moving hole and the lower surface of the roller rolling hole of the lower member are at least one of the two rolling surfaces, as a rolling surface that contacts a second roller and rolls in the first direction. From the center of the rolling surface in the first direction toward both ends in the vertical direction toward the second roller. Thereby, the seismic isolation effect is obtained for horizontal vibrations in all directions, and the upper member, the intermediate member, and the lower member can be previously combined and integrated, thereby facilitating the construction work. . Also,
Even if an earthquake with a seismic intensity larger than expected occurs, the first or second roller abuts on the end of the roller rolling hole to prevent the first or second roller from jumping out of the space between the members. Further, it is possible to prevent a device or a structure placed on the upper surface of the upper member main body of the upper member from falling down at the time of the contact.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a seismic isolation device according to Embodiment 1 of the present invention.

FIG. 2 is a plan view of the seismic isolation device according to the first embodiment.

FIG. 3 is a diagram showing a direction indicated by an arrow III in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;

FIG. 5 is a view in the direction of the arrow V in FIG. 2;

FIG. 6 is an enlarged view of a small diameter portion of the first roller.

FIG. 7 is a diagram corresponding to FIG. 1 showing an operation state of the seismic isolation device.

FIG. 8 is a view in the direction of arrow VIII in FIG. 7;

FIG. 9 is a view corresponding to FIG. 4, showing the second embodiment.

FIG. 10 is a diagram corresponding to FIG. 4, showing the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper member 1a Upper member main body 1b Support part 1c Roller rolling hole 1d Rolling surface 2 Intermediate member 2a Intermediate member main body 2b Upper supporting part 2c Upper roller rolling hole 2d Rolling surface 2f Lower supporting part 2g Lower roller rolling Moving hole 2h Rolling surface 3 Lower member 3a Lower member main body 3b Support portion 3c Roller rolling hole 3d Rolling surface 4 First roller 4b Small diameter portion 4c Tapered surface 5 Second roller 5b Small diameter portion 11 First Rubber elastic body 11a Engagement concave part 11b Rolling restriction part 12 Second rubber elastic body 12a Engagement concave part 12b Rolling restriction part

Claims (8)

[Claims] 1. An upper member and a horizontal first member.
An intermediate member that supports the intermediate member via a first roller extending in the second direction so as to be relatively movable in a horizontal second direction perpendicular to the first direction, and a second member extending in the second direction. A lower member that is supported to be relatively movable in the first direction via the roller, wherein the upper member is an upper member main body provided above the first roller. And a support portion extending downward from the upper member main body, and a roller rolling hole through which the first roller is inserted and which is opened so as to be capable of rolling in the second direction. The intermediate member includes an intermediate member main body provided between the first and second rollers, an upper supporting portion extending upward from the intermediate member main body, and a first roller provided on the upper supporting portion. Is inserted and is opened so as to be able to roll in the second direction. A rolling hole, a lower supporting portion extending downward from the intermediate member main body, and an opening through which the second roller is inserted and which can be rolled in the first direction. A lower roller rolling hole, wherein the lower member includes a lower member main body provided below the second roller, and a support portion extending upward from the lower member main body; The support portion has a roller rolling hole through which the second roller is inserted and which can be rolled in the first direction, and an upper surface of the roller rolling hole of the upper member. The lower surface of the upper roller rolling hole of the intermediate member is a rolling surface that contacts the first roller and rolls in the second direction, and at least one of the two rolling surfaces is Inclined from the center of the rolling surface in the second direction toward the both ends in the vertical direction from the center in the second direction to the first roller side; The upper surface of the side roller rolling hole and the lower surface of the roller rolling hole of the lower member serve as rolling surfaces that contact the second roller and roll in the first direction. At least one of the surfaces is inclined toward the second roller in the vertical direction from the center in the first direction of the rolling surface toward both ends. 2. The seismic isolation device according to claim 1, wherein the upper member has two support portions provided at both ends of the first roller, respectively, and the intermediate member is the upper member. And two lower support portions provided so as to be located at both ends of the second roller, respectively. The seismic isolation device is characterized in that the member has two support portions provided so as to be located near both lower support portions of the intermediate member, respectively. 3. The seismic isolation device according to claim 2, wherein the upper member, the intermediate member, and the lower member are each formed of a plate material. 4. The seismic isolation device according to claim 1, wherein the first roller is in contact with both rolling surfaces of a roller rolling hole of the upper member and an upper roller rolling hole of the intermediate member. The second roller is in contact with both rolling surfaces of the lower roller rolling hole of the intermediate member and the roller rolling hole of the lower member. A seismic isolation device having a small-diameter portion having a smaller diameter than other portions in a portion. 5. The seismic isolation device according to claim 4, wherein both side surfaces in the first direction of the small diameter portion of the first roller are tapered so as to incline outward in the first direction of the small diameter portion toward the outside in the radial direction. The second roller is characterized in that both side surfaces in the second direction of the small diameter portion of the second roller are tapered surfaces inclined outward in the second direction of the small diameter portion toward the outside in the radial direction. Quake device. 6. The seismic isolation device according to claim 1, wherein at least one of between the upper member main body and the first roller and between the intermediate member main body and the first roller. A first rubber elastic body that extends in the second direction and comes into contact with the first roller when the first roller rolls, between the intermediate member main body and the second roller and on the lower side At least one between the member main body and the second roller is provided with a second rubber elastic body extending in the first direction and contacting the second roller when the second roller rolls. A seismic isolation device characterized in that: 7. The seismic isolation device according to claim 6, wherein an engaging recess engageable with the first roller is formed at a central portion in a second direction on a roller contact surface of the first rubber elastic body, A seismic isolation device characterized in that an engagement concave portion engageable with the second roller is formed at a central portion of the second rubber elastic body in the first direction on the roller contact surface. 8. The seismic isolation device according to claim 6, wherein a rolling restricting portion for restricting the rolling of the first roller is provided at both ends of the first rubber elastic body in the second direction, A seismic isolation device comprising a second rubber elastic body provided at both ends in a first direction with a rolling restricting portion for restricting the rolling of a second roller.