JP4057441B2 - Seismic isolation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic isolation device that insulates a building side of a building from a ground side such as foundation concrete to protect the building from an external force such as an earthquake.
[0002]
[Prior art]
With respect to this type of building seismic isolation device, a seismic isolation device is disclosed that insulates between the two by interposing a rotation support mechanism and a linear movement mechanism between the building body side and the ground side (patent) Reference 1). The range of horizontal relative movement that can be dealt with in this prior art is determined by the operating range of the linear movement mechanism. Therefore, in order to increase the range that can be handled with respect to the relative movement in the horizontal direction, it is necessary to set the operation range of the linear movement mechanism large, which leads to an increase in the size of the apparatus, which increases the installation cost and installation space. There was a problem that was taken big.
[0003]
[Patent Document 1]
JP 2000-304087 A [0004]
[Problems to be solved by the invention]
The present invention has been developed in view of the above-described conventional state of the art, and the operating range can be increased for the size of the device, and the insulation function has been improved so that it can handle a larger amplitude. The purpose is to provide a seismic isolation device.
[0005]
[Means for Solving the Problems]
In the present invention, in order to solve the above-mentioned problems, an upper ring-shaped member that is rotatably mounted via a rotation support mechanism with respect to an upper mounting member that is fixed to the building side of the building, and a lower portion that is fixed to the ground side A lower ring-shaped member rotatably mounted on the mounting member via a rotation support mechanism, and one engaging means is provided in the longitudinal direction for each of the upper ring-shaped member and the lower ring-shaped member. An upper linear rail member or a lower linear rail member formed along the upper side of the ring-shaped member is fixed so as to pass through the center of the ring-shaped member. The upper moving member or the lower moving member is mounted so as to be movable along the longitudinal direction of the linear rail member via the other engaging means engaged with the engaging means. And, employing the technical means that rotatably connected further via a rotary coupling and their upper movable member and the lower movable member. According to the present invention, the upper moving member and the lower moving member, which are rotatably connected via the rotary connecting mechanism, can be moved along the upper linear rail member or the lower linear rail member via the engaging means, respectively. Therefore, it is possible to use almost the entire length of both the upper linear rail member and the lower linear rail member as the relative movement distance in the horizontal direction, so that the corresponding relative movement distance is almost doubled. can do.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The seismic isolation device according to the present invention is suitable for a detached house, but is not limited to this and can be widely applied as a seismic isolation device for various buildings. There are no particular restrictions on the specific shapes of the upper mounting member and the lower mounting member, and regarding the fixing method to the building side or the ground side of the building, the fixing member embedded in the concrete as in the following examples. On the other hand, it is possible to apply an appropriate fixing method such as fastening with bolts. For the rotation support mechanism installed between the upper mounting member and the upper ring-shaped member or between the lower mounting member and the lower ring-shaped member, an appropriate rotation support mechanism such as a thrust bearing can be employed. . Further, with respect to the engaging means installed between the upper linear rail member and the upper moving member or between the lower linear rail member and the lower moving member, the upper moving member or the lower moving member is referred to as the above-mentioned engaging means. Any material that can be guided along the longitudinal direction of the linear rail member may be used. For example, it is possible to reduce the frictional resistance of the concave groove formed on one side and the convex portion formed on the other side engaged to enable relative sliding or the joint between the concave groove and the convex portion. Therefore, it is possible to adopt an appropriate form of engagement such as a structure in which a small steel ball is interposed for rolling contact. In addition, regarding the cross-sectional shape of the concave groove or the convex portion, it is possible to adopt an appropriate shape such as a U-shape, a V-shape, or an arc shape. With respect to the rotation connecting mechanism that rotatably connects the upper moving member and the lower moving member, an appropriate rotation support mechanism such as a thrust bearing can be employed.
[0007]
【Example】
FIG. 1 is a longitudinal sectional view of an essential part showing an installed state of a seismic isolation device according to an embodiment of the present invention, and FIG. 2 is an exploded view thereof. As shown in the figure, the seismic isolation device 1 according to the present embodiment includes an upper ring-shaped member 5 that is rotatably mounted via a rotation support mechanism 4 on an upper mounting member 3 that is fixed to the building 2 side of the building. And a lower ring-shaped member 9 that is rotatably attached to the lower mounting member 7 fixed to the ground 6 side via a rotation support mechanism 8. The upper mounting member 3 and the lower mounting member 7 are formed on the upper mounting member 3 and the lower mounting member 7 with respect to the female screw portions of the fixing members 10 and 11 embedded in the concrete on the frame 2 side or the ground 6 side. The bolts 14 and 15 inserted through the formed bolt insertion holes 12 and 13 are screwed and tightened to be fixed at a predetermined installation position. As shown in the plan view of FIG. 3 and the AA enlarged cross-sectional view of FIG. 4, the rotation support mechanism 4 and the rotation support mechanism 8 in this embodiment are a combination of an inner ring 16 and an outer ring 17. A plurality of steel balls 20 housed between the V-grooves 18 and 19 formed on the facing joint surfaces are relatively rotatable. The inner ring 16 is further divided into an upper ring member 16a and a lower ring member 16b, and enables the interior of the steel ball 20 between the V grooves 18 and 19 to be provided. As shown in FIG. 2, the inner ring 16 is externally fitted to the outer annular notches 21 and 22 formed in the upper mounting member 3 or the lower mounting member 7, and the other surfaces of the inner ring 16 are fixed. The plates are fixed to the upper mounting member 3 side or the lower mounting member 7 side by fastening with plates 23 and 24 and bolts 25 and 26. On the other hand, the outer ring 17 is fitted into inner annular notches 27 and 28 formed in the upper ring member 5 or the lower ring member 9, and the other surfaces of the outer ring 17 are fixed to the fixing rings 29 and 30 and the bolts. The rotation support mechanism 4 which is fixed to the upper ring-shaped member 5 side or the lower ring-shaped member 9 side by being tightened and fixed using 31 and 32 and can be relatively rotated by the combination with the inner ring 16 or A rotation support mechanism 8 is configured.
[0008]
The upper ring-shaped member 5 and the lower ring-shaped member 9 are provided with an upper straight rail member 33 or a lower straight rail member 34 so as to pass through the centers of the ring members 5 and 9. The bolt 35 is fixed. In the upper linear rail member 33 and the lower linear rail member 34, as shown in the partial views illustrated in FIGS. 5 to 7, in the present embodiment, one engaging means 36 formed of a concave groove is provided in the longitudinal direction. The upper moving member 38 or the lower moving member 39 shown in FIG. 1 and FIG. Is mounted for relative movement. 5 to 7 exemplify the engaging portion between the lower linear rail member 34 and the lower moving member 39, the engaging portion on the upper linear rail member 33 side basically has the same configuration. .
[0009]
Next, a rotation connecting mechanism that rotatably connects the upper moving member 38 and the lower moving member 39 will be described. As shown in FIG. 1, the rotary connecting mechanism includes an upper connecting member 40 fixed to the upper moving member 38 side, a lower connecting member 41 fixed to the lower moving member 39 side, and the upper connecting members 40. And a lower connecting member 41 are connected to and rotatably supported by a rotation support mechanism 42. As shown in the enlarged exploded view of FIG. 8, the rotation support mechanism 42 is composed of a combination of an inner ring 43 and an outer ring 44 in the same manner as the rotation support mechanism 4 and the rotation support mechanism 8, and faces each other. It is configured to be relatively rotatable by a large number of steel balls built in between the V grooves formed on the joining surface. The inner ring 43 is externally fitted to an outer annular notch 45 formed in the lower connecting member 41, and the other surface of the inner ring 43 is fastened and fixed using a fixing plate 46 and a bolt 47, whereby the lower ring It is fixed to the connecting member 41 side. On the other hand, the outer ring 44 is fitted into an inner annular notch 48 formed in the upper connecting member 40, and the other surface of the outer ring 44 is fastened and fixed using a fixing ring 49 and a bolt 50. The rotation support mechanism 42 is configured by being combined with the inner ring 43 and fixed to the member 40 side, and the upper connection member 40 and the lower connection member 41 are rotatably connected and supported. The upper connecting member 40 and the lower connecting member 41 are fixed to the upper moving member 38 or the lower moving member 39 using bolts 51 and 52, respectively.
[0010]
Hereinafter, the method of operation of the seismic isolation device 1 will be described. In the normal installation state of the seismic isolation device 1 shown in FIG. 1 and FIG. 2, the case where the upper linear rail member 33 and the lower linear rail member 34 are in a state of being orthogonal to each other at substantially the center is illustrated. In this normal installation state, the upper linear rail member 33 and the lower linear rail member 34 do not necessarily have to be orthogonal to each other, and there is no problem even if they intersect at other angles. When an external force such as seismic force is applied, first, the upper linear rail member 33 and the lower linear rail member 34 are directed toward the external force via the rotation support mechanism 4 or the rotation support mechanism 8. Rotate to. The rotational movement of the upper linear rail member 33 and the lower linear rail member 34 is based on the inertial force that maintains the current state acting on the housing 2 side and the external force that acts on the ground 6 side. It is because 38 and the lower moving member 39 are urged | biased so that it may transfer to the state which can be relatively moved together along external force.
[0011]
When the upper linear rail member 33 and the lower linear rail member 34 face in the direction of the external force, the upper linear rail member 33 and the lower linear shape are interposed via the engaging means 36 and 37. Relative movement according to the external force occurs between the rail member 34, that is, between the housing 2 side and the ground side 6, thereby insulating the two so as not to transmit the movement on the ground 6 side to the housing 2 side. . In this case, a range in which the substantially entire length of the engaging means 36 formed on the upper linear rail member 33 and the substantially entire length of the engaging means 37 formed on the lower linear rail member 34 can be relatively moved in accordance with an external force. Will function effectively. Therefore, in this embodiment, the corresponding horizontal relative movement distance between the upper mounting member 3 fixed on the building 2 side of the building and the lower mounting member 7 fixed on the ground 6 side is larger than that in the conventional case. Will be almost doubled.
[0012]
As described above, in the seismic isolation device 1 according to the present embodiment, when an external force such as an earthquake is applied, both the upper linear rail member 33 and the lower linear rail member 34 immediately rotate in the direction of the external force. By inducing relative movement between the upper linear rail member 33 and the lower linear rail member 34 according to the external force, the two are insulated so as not to transmit the movement between the ground 6 side and the frame 2 side. This operation is repeated according to the change in the direction of the external force. In the seismic isolation device 1 according to the present embodiment, the relative relationship between the upper linear rail member 33 and the lower linear rail member 34 generated by an external force such as an earthquake, that is, between the housing 2 side and the ground side 6. Since there is no return mechanism for returning the original displacement to the original installation state, the original installation state is restored by appropriate return means provided separately.
[0013]
【The invention's effect】
According to the present invention, the upper ring-shaped member rotatably mounted on the building side of the building and the upper linear rail member horizontally mounted on the lower ring-shaped member rotatably mounted on the ground side and the lower portion Since the upper moving member and the lower moving member, which are rotatably coupled to the linear rail member, are mounted so as to be movable along the longitudinal direction of the linear rail member via the engaging means, Since it has become possible to utilize the entire length of both the linear rail member and the lower linear rail member as the relative movement distance in the horizontal direction, the conventional relative movement distance that can handle external forces such as earthquakes has been established. Can be almost doubled compared to technology. Therefore, the operating range can be increased for the size of the device, and the insulation function can be improved so as to cope with a larger amplitude.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part showing an installation state of a seismic isolation device according to an embodiment of the present invention.
FIG. 2 is an exploded view of the seismic isolation device.
FIG. 3 is a plan view illustrating a rotation support mechanism.
FIG. 4 is an AA enlarged sectional view of the rotation support mechanism.
FIG. 5 is a front view illustrating the engaging portion between the lower linear rail member and the lower moving member.
FIG. 6 is a plan view showing the engaging portion.
FIG. 7 is a side view showing the engaging portion.
FIG. 8 is an enlarged exploded view illustrating a rotary coupling mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Seismic isolation device, 2 ... Building frame, 3 ... Upper attachment member, 4 ... Rotation support mechanism, 5 ... Upper ring-shaped member, 6 ... Ground, 7 ... Lower attachment member, 8 ... Rotation support mechanism, 9 ... Lower part Ring member, 10, 11 ... Fixing member, 12, 13 ... Bolt insertion hole, 14, 15 ... Bolt, 16 ... Inner ring, 17 ... Outer ring, 18, 19 ... V groove, 20 ... Steel ball, 21, 22 ... Outer annular notch, 23, 24 ... Fixing plate, 25, 26 ... Bolt, 27, 28 ... Inner annular notch, 29, 30 ... Fixing ring, 31, 32 ... Bolt, 33 ... Upper linear rail member, 34 ... Lower linear rail member, 35 ... Bolt, 36 ... One engaging means, 37 ... Other engaging means, 38 ... Upper moving member, 39 ... Lower moving member, 40 ... Upper connecting member, 41 ... Lower connecting member Member, 42 ... rotation support mechanism, 43 ... inner ring, 4 ... outer ring, 45 ... outer annular notch, 46 ... fixing plate, 47 ... bolt, 48 ... inner annular notch, 49 ... securing ring, 50 to 53 ... Bolt

Claims (1)

An upper ring-shaped member that is rotatably mounted to the upper mounting member fixed to the building side of the building via a rotation support mechanism, and a lower mounting member that is fixed to the ground side via the rotation support mechanism. A lower ring-shaped member that is rotatably mounted, and an upper linear rail member in which one engaging means is formed along the longitudinal direction for each of the upper ring-shaped member and the lower ring-shaped member, or The lower linear rail member is fixed horizontally so as to pass through the center of the ring-shaped member, and the engaging means is attached to the upper linear rail member and the lower linear rail member, respectively. The upper moving member or the lower moving member is mounted so as to be movable along the longitudinal direction of the linear rail member via the other engaging means to be engaged, and further, the upper moving member and the lower moving member are mounted. Seismic isolation system being characterized in that rotatably connects the movable member through the rotary coupling.

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