JP2008240290A - Base-isolating device and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base-isolating device which can reduce oscillations, generated by an earthquake, by means of a steel wire and a plurality of rings, and which can also buffer the oscillations by rigidity possessed by the base-isolating device itself. <P>SOLUTION: The base-isolating device 1, which is interposed between a building and the ground, mainly comprises: a base 4 which is fixed onto the ground; a base supporting ring 7 which is supported on the base 4; a first strut 2 which is connected to the base supporting ring 7; an outside connecting ring 15 which is connected to an upper end 14 of a first strut material 2; a base-isolating portion 9 for connecting the outside connecting ring 15 and a central bearing stand 22 together; an oscillation mechanism section 6 which is equipped with the central bearing stand 22, a support 24, and a building connecting portion 5; and an oscillation mechanism section 6 which is provided with the base supporting ring 7, the first strut 2, the building connecting portion 5 connected to a part of the building, and the central bearing stand 22 connected to the base-isolating portion 9 via the steel wire 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seismic isolation device and a construction method using the seismic isolation device, and more particularly, to a seismic isolation device that can be introduced in a general wooden house while suppressing manufacturing costs, and a construction method of the seismic isolation device. Is.

  Conventionally, various earthquake prevention measures have been taken to prevent damage caused by collapse of buildings such as houses due to earthquakes, large furniture installed indoors, large household appliances such as televisions, or lateral movement. Many measures are taken. Here, these seismic countermeasures are to install seismic walls that have sufficient strength against the generated seismic energy and seismic reinforcements such as seismic reinforcements inside the building separately, and the seismic structure of the entire building It is mainly done to increase.

  In recent years, in addition to earthquake-resistant buildings with earthquake-resistant design, structures with measures to prevent seismic energy from being directly input to buildings, that is, “seismic isolation structures” have been adopted. ing. Here, since the building having an earthquake-resistant structure does not have a function of buffering seismic energy, the seismic energy generated is received as it is. As a result, the building itself is greatly swayed laterally by the seismic energy, and if the seismic energy is larger than expected in the seismic structure, the risk of collapse etc. increases. It is exemplified as a demerit that damage is likely to occur.

  On the other hand, the idea of giving a building a seismic isolation structure is insulated so that seismic energy is not directly input to the building by a seismic isolation device interposed between the ground (or building foundation) and the building. Is to do. Therefore, the building is not affected by the earthquake energy and hardly swings. As a result, the risk of falling large furniture, damage to buildings, etc. can be relatively suppressed, and there are many advantages over measures by the above earthquake-resistant structure.

  In addition to earthquake countermeasures other than the above, the earthquake energy that has been generated is temporarily taken into the building and the action of elastic force, viscous force, etc. is used to absorb the earthquake energy and suppress the occurrence of damage. Buildings that use “seismic structures” are also considered. However, in the present specification, detailed description of the vibration control structure is omitted.

  Here, the seismic isolation structure will be described in more detail. Examples of the seismic isolation apparatus that adopts the conventionally known seismic isolation structure or the principle of the seismic isolation structure include the following. That is, it has a plurality of rubber plates having flexibility in the horizontal direction (horizontal direction) and having a certain degree of hardness in the vertical direction (vertical direction), and steel plates stacked alternately with the rubber plates. There is known a seismic isolation device in which a laminated rubber formed by the above is provided between the ground and a building, and the acceleration of seismic energy is reduced according to the elastic deformation of the rubber plate.

  In addition, a lateral joint is transmitted to a central body located on the innermost side of the pendulum link by using a spherical joint that connects a plurality of annular bodies arranged substantially concentrically in the vertical direction, and by providing a plurality of pendulums that are improved. Development of a seismic isolation device that suppresses vibrations is also underway (see, for example, Patent Document 1).

JP-A-11-72139

  However, the above-described seismic isolation device may cause the following problems. That is, the most commonly used seismic isolation device using laminated rubber is mainly suitable for relatively large buildings such as high-rise buildings because of its structure. It was not suitable for buildings due to its relatively light weight, mainly wood houses such as ordinary houses. That is, even if the seismic isolation device using the above laminated rubber or the like is used, the seismic isolation effect by the laminated rubber cannot be sufficiently recognized in a relatively light wood house or the like.

  Furthermore, it is known that when a seismic isolation device using ball bearings or sliding members (so-called “rolling support”) is used, the response time from the occurrence of an earthquake to obtaining a sufficient seismic isolation effect is relatively slow. In places close to the epicenter, there was a risk of collapse of houses and furniture. In addition, when a structure such as a ball bearing or a sliding member is used, residual deformation after an earthquake may remain as it is. In other words, when a certain time has elapsed since the occurrence of the earthquake, and the seismic motion due to the earthquake has converged, the seismic isolation device using ball bearings, etc. is the standby position (reference position) before the earthquake occurs due to the seismic energy received at the time of occurrence. In some cases, it was not possible to return naturally, and the vehicle stopped in a state where it was biased to either one. As a result, in the case of the above seismic isolation device, it was necessary to provide a forced return device such as an oil damper in order to return to the original standby position after the occurrence of the earthquake. Therefore, in addition to the cost required for the seismic isolation device, it is necessary to install auxiliary equipment such as an oil damper, which increases the installation cost and requires a lot of installation space for the seismic isolation device. For this reason, it has been difficult to apply to general houses where installation space is limited.

  On the other hand, as shown in Patent Document 1, the seismic isolation device in which a plurality of annular bodies and a pendulum link are coupled by a spherical joint can solve the above-described problems and be formed relatively compact. Has an excellent advantage. However, the seismic isolation device suppresses the seismic energy applied in the lateral direction by changing individual coupling angles by the annular body and the pendulum link, and the annular body and the pendulum link itself change its length. I did not let it. That is, the seismic isolation device itself functions as a rigid body, and the seismic isolation device alone did not absorb a certain amount of vibration.

  For this reason, when trying to cope with an earthquake having a large earthquake energy, it is necessary to increase the movement range of the annular body or to increase the number of annular bodies. Furthermore, since the annular body is coupled by the pendulum link, when a lateral swing is received by the seismic energy, it is necessary to move up and down to buffer the swing (Patent Document 1, FIG. 3). (See Reference), and vertical motion may occur due to seismic isolation.

  Therefore, in view of the above situation, the present invention has a seismic isolation function that suppresses rocking caused by an earthquake with a simple configuration, and further can seismic energy be buffered by the rigidity of the seismic isolation system itself, Another object of the present invention is to provide a construction method for a seismic isolation device using the seismic isolation device.

  In order to solve the above problems, the seismic isolation device of the present invention is a seismic isolation device interposed between a building and the ground, and is connected to a base fixed to the ground and above the base. A ring-shaped gantry support ring to be supported, and at least three or more first bunches whose lower ends are connected to the gantry support ring while maintaining a predetermined inclination angle toward the gantry center; A ring-shaped outer connection ring connected so as to bridge between the upper ends of the respective bundle members of the first bundle member, and one end thereof is fixed in the vicinity of the gantry and along the longitudinal direction of the first bundle member A steel wire that is supported obliquely upward from the lower end of the bundle member to the upper end of the bundle member and bent downward in a substantially vertical downward direction from the outer connection ring, and an inner side of the outer connection ring by the suspended steel wire Center cradle supported in a swingable manner at the bottom, front A support column provided so that at least one end protrudes from the upper surface of the ring of the outer connection ring from a center pedestal, and a building connection part provided at the upper end of the support column and connected to a part of the building And at least one of the gantry support ring and the outer connecting ring is formed mainly with a structure that is elastically deformable with respect to a load. .

  Here, the “base” is placed directly on the ground or on a building foundation formed of wood, concrete, or the like, and is firmly fixed by known fixing and fastening means such as bolts and nuts. Thereby, the ground and the gantry are integrally coupled, and the generated seismic energy is transmitted to the gantry. The shape of the gantry is not particularly limited. For example, an annular plate material is exemplified, and the ground (or may be a building foundation) at fixed points provided at 90 ° intervals. It may be firmly fixed. The gantry is required to support the load of the building supported by the seismic isolation device of the present invention at the lowermost part, and to have a characteristic that does not easily deform due to energy such as an earthquake. Therefore, it is preferable to construct a hard steel material or the like as a material. In the case of the seismic isolation device of the present invention, considering the weight of a general house, the entire building to be supported is assumed to be strong enough to withstand a load of about 3 tons per seismic isolation device. The number of seismic isolation devices to be used may be set as appropriate according to the weight of the vehicle.

  Further, the “first bundle member” has a function as a guide that supports the steel wire obliquely upward and restricts the movement of the steel wire in the lateral direction. In addition, the number of the first bundle material to be used is not particularly limited, but at least in order to support the heavy building as well as the steel wire and stably suppress the swing due to the earthquake, It is necessary to have three or more first bundles. Here, the first bundle member is preferably connected to the gantry support ring at equal intervals with the cradle center as a reference point in order to evenly distribute the load applied to each bundle member. When using the first bundle material, it is preferable to arrange them at 120 ° intervals, while when using the four first bundle materials, those arranged at 90 ° intervals are preferable. Note that the first bundle member and the gantry support ring described later, and the gantry support ring and the gantry need to be firmly connected by well-known fixing means such as welding.

  On the other hand, the gantry support ring is joined to ring receiving portions provided at a plurality of locations (for example, four locations at equal intervals) of the gantry, and is supported in a state where the ground and the bottom surface of the gantry support ring are slightly separated from each other. Can be illustrated. On the other hand, the outer connection ring is connected so as to bridge between the upper ends of the respective bundle members of the first bundle member in which a plurality of the support members are connected from the gantry support ring. Here, the gantry support ring and the outer connection ring are, for example, bent substantially rod-shaped steel materials into a substantially perfect circle shape, and are connected to the ring receiving portion of the gantry and the upper end of the bundle material of the first bundle material by welding or the like, respectively. Is shown.

  The gantry support ring and the outer connecting ring have rigidity capable of elastic deformation with respect to a load applied to the ring, that is, function as a rigid body. Therefore, in the case of a circular ring-shaped ring as described above (for example, in the case of an outer connecting ring), even if a load that deforms a perfect circle shape is applied by seismic energy, On the other hand, deformation is performed such that the diameter of the ring is increased, and in the direction orthogonal thereto, deformation is performed so that the ring diameter is increased, and the true circle is temporarily changed to an ellipse. Thereafter, when the earthquake is converged and the load is released, the outer connecting ring having rigidity can return to the original perfect circle shape again by elastic deformation. That is, the rigidity itself can have an action of absorbing (buffering) the vibration energy caused by the earthquake. The gantry support ring and the outer connection ring are not limited to those having a perfect circle shape as described above, and may be, for example, a ring shape such as a square shape or a triangular shape.

  In addition, the steel wire uses a steel material that is formed into a thin and linear shape, and is supported along the longitudinal shape of the first bundle material, further bent by the upper connection ring, and suspended downward to sway. The moving mechanism unit can be suspended and supported. Here, as described above, when four first bundle members are provided at an interval of 90 ° with respect to the center of the gantry, one steel wire is used for the first bundle members facing each other, and the steel wire It becomes possible to support the center receiving base of the swinging mechanism portion from below at the center portion of the. In this case, on the bottom surface of the center cradle of the swing mechanism part, the two steel wires cross in a cross so as to be orthogonal to each other. As a result, the swing mechanism including the center cradle is supported so as to be freely swingable inside the upper end connecting ring.

  On the other hand, the oscillating mechanism section includes a center cradle supported by the above-described steel wire, and the building connecting section provided at the upper end of the column is one of the buildings to be seismically isolated. Connected with the department. Here, for the connection between the building connecting portion and the building, well-known fixed fastening means such as bolts and nuts can be adopted.

  Therefore, according to the seismic isolation device of the present invention, when a substantially horizontal swing is caused by an earthquake, a plurality of first bundles connected to a gantry directly attached to the ground and a gantry support ring supported by the gantry. The outer connection ring connected to the material and the first bundle material swings in a substantially horizontal direction in the same manner as the ground swings. However, the swinging mechanism portion suspended from and supported by the steel wire from the outer connecting ring does not directly receive these swings. Therefore, it tries to continue the state before the earthquake according to the law of inertia. That is, when an earthquake occurs, the outer connecting ring around the swing mechanism part swings, but the swing mechanism part supported by the steel wire is insulated by the steel wire, so it swings almost. There is no. As a result, the energy of rocking caused by the earthquake can be attenuated, and the damage caused by the earthquake such as the collapse of the building or the fall of the furniture in the room can be minimized.

  In addition, as described above, the seismic isolation device of the present invention has a rigidity that allows elastic deformation of the gantry support ring and the outer connection ring with respect to the load. Can be buffered. As a result, the energy of rocking transmitted to the rocking mechanism can be further reduced, and damage caused by an earthquake can be further reduced.

  Furthermore, the seismic isolation device according to the present invention may include, in addition to the above-described configuration, “a lower connection ring, a second bundle member, and an upper connection that are interposed between the outer connection ring and the center receiving base of the swing mechanism portion. And a ring-shaped lower coupling provided at a lower side of the outer coupling ring or the upper coupling ring, the seismic isolation section further including at least one ring-bundle group having a ring. A ring, the lower connecting ring and the lower end of the bundle member are connected, and at least three or more of the second bundle members attached to the lower connecting ring while maintaining the inclination angle toward the center of the gantry, and the second The steel wire suspended from the outer connection ring or the upper connection ring is configured to have the ring-shaped upper connection ring connected so as to bridge between the upper ends of the respective bundle members of the bundle, under Bent by a connecting ring, supported diagonally upward from the lower end of the bundle member to the upper end of the bundle member along the longitudinal shape of the second bundle member, and suspended from the upper connecting ring in a substantially vertical direction to the center cradle or It may be led out to the lower connecting ring, and at least one of the lower connecting ring and the upper connecting ring may be formed so as to have rigidity capable of elastic deformation with respect to a load.

  Therefore, according to the seismic isolation device of the present invention, the seismic isolation portion having at least one ring-bundle group is provided between the outer coupling ring and the center cradle of the swing mechanism portion. Here, the lower connecting ring, the second bundle member, and the upper connecting ring that constitute the seismic isolation unit have substantially the same configuration as the already described gantry support ring, the first bundle member, and the outer connecting ring, and are the same. The effect of this is achieved. That is, the seismic isolation action of the swinging mechanism portion supported by being suspended by the steel wire changes according to the length of the steel wire. That is, the swing range of the swing mechanism is determined by the length of the steel wire that hangs down from the outer connecting ring and reaches the center cradle.

  However, it is difficult to provide an unnecessarily high height between the building and the ground, and these heights are required to be as low as possible. Therefore, as in the present invention, at least one ring-bundle group consisting of a lower connection ring, a second bundle member, and an upper connection ring is provided between the outer connection ring and the center cradle, more preferably in two stages. By providing the above-mentioned multi-stage seismic isolation parts, the length of the steel wire is extended in a substantially horizontal direction, and the same effect as when a long steel wire is used is achieved. As a result, even if the swing is caused by a very large seismic energy such as a large earthquake without changing the height between the building and the ground, it can be swung by the seismic isolation part consisting of a ring-bundle group. It becomes possible to buffer. The lower connecting ring and the upper connecting ring constituting the ring-bundle group are also formed with rigidity that can be elastically deformed with respect to the load, similarly to the outer connecting ring described above. It is possible to achieve the energy buffering effect of the above.

  Furthermore, the seismic isolation device of the present invention may be “the steel wire is formed with rigidity capable of elastic deformation with respect to a load” in addition to the above configuration.

  Therefore, according to the seismic isolation device of the present invention, the steel wire is formed of a material that can be elastically deformed. Therefore, even when the above-described swinging mechanism part, ring, and the like are about to move in a substantially horizontal direction, the steel wire itself can buffer the energy due to the earthquake by stretching or contracting. Become. As a result, in addition to the above-described action, it is possible to more stably suppress rocking due to an earthquake, and the possibility of the building rocking is reduced.

  Furthermore, the seismic isolation device of the present invention has the above-mentioned configuration, “the first bundle material and the second bundle material can penetrate the bundle material surface and the bundle material back surface near the center and insert the steel wire. When the steel wire is supported obliquely upward by the first bundle material or the second bundle material, the steel wire is inserted into the through hole, and the first bundle material or The steel wire may be supported so as to cross over the longitudinal shape of the second bundle.

  Therefore, according to the seismic isolation device of the present invention, the steel wire disposed along the longitudinal shape of the bundle material in the diagonally upward direction from the bundle material lower end toward the bundle material upper end is provided near the center of the bundle material. It is supported through the through hole. That is, the steel wire extended from the pedestal or bent by the lower connecting ring is supported so as to cross the longitudinal shape of the bundle. As a result, it is possible to easily suspend the bent steel wire from the outer connecting ring and bend it again with the upper connecting ring. In addition, by adopting such a configuration, it is possible to stably support the load of the building with the steel wire.

  Furthermore, the seismic isolation device of the present invention may be one in which “the outer connecting ring, the lower connecting ring, and the upper connecting ring are formed in a concentric circular shape having a substantially circular shape” in addition to the above configuration. I do not care.

  Therefore, according to the seismic isolation device of the present invention, the outer connecting ring, the lower connecting ring, and the upper connecting ring are each formed concentrically. Thereby, even when a load due to seismic energy is applied from any direction of 360 °, since the rings are always supported at equal intervals, the seismic isolation effect of seismic energy can be stably maintained. .

  On the other hand, the construction method of the seismic isolation device of the present invention is “the construction method of the seismic isolation device as described above, wherein the other one of the seismic isolation devices is connected to the building connection portion of the swing mechanism portion of the other seismic isolation device. The base of the seismic isolation device is connected, or the other one of the seismic isolation devices is turned upside down on the building connection part of the swing mechanism of the one of the seismic isolation devices, and the building connection part of each other Connected to each other and constructed by stacking two or more seismic isolation devices between the ground and the building.

  Therefore, according to the construction method of the seismic isolation device of the present invention, a plurality of seismic isolation devices are stacked one on top of the other, or the top and bottom of the seismic isolation device are reversed while being constructed, so that a substantially horizontal direction is achieved. It is possible to increase the rocking suppression action in accordance with the number of stacked stages.

  As an effect of the present invention, it is possible to prevent the swing caused by an earthquake from being transmitted directly to the swing mechanism by supporting the swing mechanism with a steel wire. There is almost no earthquake vibration transmitted to the building. As a result, it is possible to suppress the occurrence of damage caused by the collapse of buildings or the fall of furniture or the like indoors. In particular, by providing a seismic isolation part in which the ring-bundle group is formed in multiple stages, the height of the seismic isolation device, in other words, a high seismic isolation without significantly increasing the height between the building and the ground. You can enjoy the effect. Further, each ring constituting the seismic isolation device and the steel wire itself supported by the ring or the like are formed of a material having elasticity that can be elastically deformed. Absorption). Therefore, the seismic isolation effect by the seismic isolation device is further enhanced. Furthermore, since it has a relatively simple configuration and is easy to construct a general house, it can also be used for a wooden house that has been difficult to install.

  Hereinafter, a seismic isolation device 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. Here, FIG. 1 is a front view showing the configuration of the seismic isolation device 1 of the present embodiment, FIG. 2 is a plan view showing the configuration of the seismic isolation device 1, and FIG. 3 shows the configuration of the seismic isolation device 1. FIGS. 4A and 4B are cross-sectional views, FIG. 4A is a plan view showing the configuration of the first bundle material 2 or the second bundle materials 3a and 3b, and FIG. 5B is a front view. It is explanatory drawing which shows an example of suppression typically.

  As shown in FIGS. 1 to 5, the seismic isolation device 1 of the present embodiment is interposed between the building H and the ground G (see FIG. 3 and the like), and is firmly attached to the ground G. The fixed base 4, the base support ring 7 supported by the base 4, the first bundle 2 connected to the base support ring 7, and the external connection connected to the bundle upper end 14 of the first bundle 2 The seismic isolation part 9 including the ring 15, the outer connection ring 15, and the ring-bundle group 10 that connects the center receiving base 22, the building connection part 5 that is connected to a part of the building H, and the seismic isolation It is mainly comprised by the rocking | fluctuation mechanism part 6 provided with the center receiving stand 22 connected via the part 9 and the steel wire 8. FIG.

  More specifically, the gantry 4 is located at the lowermost part and the outermost part of the seismic isolation device 1 of the present embodiment as shown in FIGS. A plate-shaped member having a shape (see FIG. 3) is constituted by a pair of semicircular mounts 11a and 11b bent in a semicircular shape, and the respective ends (not shown) so that the concave curved surfaces R correspond to each other. Are formed in a circular shape as a whole. And the fixing tool 12 for fixing to the ground G is attached to the position of four places holding the equal intervals of 90 degrees on the basis of the mount center C of the circular mount 4. Here, the fixing tool 12 uses a well-known fixing fastener such as a bolt and a nut in the present embodiment. The fixture 12 is also used to maintain the contact state between the end portions described above.

  Here, the gantry 4 is made of a hard steel material as a whole. Therefore, the gantry 4 fixed to the ground G is not easily deformed even when a load such as rocking due to an earthquake or other stress is applied.

  Furthermore, the gantry support ring 7 is placed and supported on a ring receiving portion 4a projecting from the gantry 4 at four positions of the gantry 4 (the same position as the fixture 12 described above). It is configured by bending a rod-shaped steel material into a substantially circular shape. Here, the gantry support ring 7 and the gantry 4 (ring receiving portion 4a) are fixed by welding or the like.

  The four first bundle members 2 are connected to the gantry support ring 7. Specifically, as shown in FIG. 2 and the like, while maintaining a predetermined inclination angle θ from the four positions of the gantry support ring 7 (substantially the same position as the ring receiving portion 4a) toward the gantry center C, The bundle material lower end 13 of the first bundle material 2 is attached so as to be connected. Furthermore, a substantially perfect circular outer connecting ring 15 connected so as to bridge between the bundle upper ends 14 is connected to the bundle upper end 14 of the first bundle 2. Note that both the gantry support ring 7 and the outer connecting ring 15 are configured as rigid bodies having rigidity capable of elastic deformation with respect to a load.

  Further, the seismic isolation portion 9 interposed between the outer connecting ring 15 and the center pedestal 22 of the swinging mechanism portion 6 is disposed at an inner lower position of the outer connecting ring 15, and from the ring inner diameter of the outer connecting ring 15. Is designed to have a slightly smaller ring outer diameter, and is provided in four locations: a substantially perfect circle-shaped first lower connecting ring 16a nested in the gantry 4; The first bundle member is held at a position (coincident with the connecting position of the fixing member 12 and the first bundle member 2) so as to match the inclination angle θ of the first bundle member 2 toward the gantry center C. The two second bundle members 3a arranged so as to be substantially parallel to the inside of the two bundle members 2 and the bundle member upper ends 14 of the second bundle members 3a are connected so as to be bridged, and the outer connection rings. 15 and the inner diameter of the outer connecting ring 15 The first upper connecting ring 17a having a substantially ring-shaped outer shape with a small ring outer diameter, and a lower position inside the first upper connecting ring 17a, and the first lower connecting ring 16a A substantially perfect circle arranged at the same height and designed to have a ring outer diameter slightly smaller than the inner diameter of the first upper connecting ring 17a and nested in the first lower connecting ring 16a. The first bundle toward the pedestal center C at the four positions of the second lower coupling ring 16b and the second lower coupling ring 16b (matching the fixture 12, the first bundle 2 and the second bundle 3a). Each of the four second bundle members 3b, which are held so as to be aligned with the inclination angle θ of the material 2 and the second bundle member 3a, and are arranged so as to be substantially parallel to the second bundle member 3a, etc. So as to bridge between the bundle upper ends 14 of the respective second bundles 3b Are connected at the same height as the outer connecting ring 15 and the first upper connecting ring 17a, and are designed to have a ring outer diameter smaller than the inner diameter of the first upper connecting ring 17a. The second upper connecting ring 17b having a substantially perfect circle shape provided in a nested manner with respect to the ring 17a is provided. Here, from the first lower connecting ring 16a, the second bundle member 3a, and the first upper connecting ring 17a, the second lower connecting ring 16b, the second bundle member 3b, and the second upper connecting ring 17b. Each corresponds to the ring-bundle group 10 in the present invention. That is, two sets of ring-bundle material groups 10 are included in the seismic isolation unit 9 in the seismic isolation device 1 of the present embodiment.

  And the steel wire 8 is spanned over the 1st bundle material 2, the outer side connection ring 15, and the seismic isolation part 9 mentioned above. That is, one end 8a of the steel wire 8 is fixed to the steel wire fixing portion 18 provided so as to be close to the ring receiving portion 4a of the gantry 4, and further, the first bundle member 2, the outer connecting ring 15, and the first lower portion. A steel wire that is spanned between the part connecting ring 16a, the first upper connecting ring 17a, the second lower connecting ring 16b, and the second upper connecting ring 17b, bent downwards at the second lower connecting ring 16b, and drooped. 8 is attached.

  Here, as shown in FIGS. 4A and 4B, the first bundle member 2 and the second bundle members 3a and 3b are formed using a single plate-like steel material, A long through-hole 21 penetrating the bundle material surface 19 and the bundle material back surface 20 is formed in the part. The first bundle 2 and the second bundle 3a, 3b are not particularly different in configuration. Here, the drilled through hole 21 is formed with a width that allows at least the steel wire 8 to be inserted, and the steel wire 8 supported by the first bundle member 2 or the like is laterally formed by the through hole 21. Movement to the (corresponding to the width direction of the first bundle 2 etc.) is restricted.

  A specific example of the attachment (overheading) of the steel wire 8 to the first bundle 2, the outer connecting ring 15, and the seismic isolation part 9 will be described in more detail. As shown in FIG. The steel wire 8 with one end fixed is supported by the first bundle 2 along the bundle rear surface 20 from the bundle lower end 13 of the first bundle 2 and further passes through the through hole 21 to the bundle surface 19. And reaches the bundle upper end 14 along the bundle surface 19. As a result, the steel wire 8 is supported diagonally upward along the longitudinal shape of the first bundle 2. At this time, as shown in FIG. 3, the steel wire 8 and the first bundle 2 cross each other in the vicinity of the center of the first bundle 2. As a result, the steel wire 8 inserted into the through hole 21 is restricted from moving in the horizontal direction (the vertical direction in FIG. 4A).

  Thereafter, the steel wire 8 that has reached the bundle upper end 14 of the first bundle 2 is bent downward according to the outer connecting ring 15 connected to the bundle upper end 14 and is in a suspended state. Here, a ring outer diameter slightly smaller than the ring inner diameter of the outer connecting ring 15, in other words, a ring outer diameter having a difference between the ring inner diameter and the hole diameter of the steel wire 8 is provided at a place where the steel wire 8 is suspended. A first lower connecting ring 16a designed to have is arranged. The steel wire 8 is in contact with the first lower connecting ring 16a and is bent obliquely upward along the ring 16a. Thereafter, the second bundle member 3a connected to the first lower connecting ring 16a and the bundle member rear surface 20 to the bundle member surface 19 through the through hole 21 and obliquely upward as in the first bundle member 2 described above. Supported.

  In addition, the structure concerning the subsequent 1st upper connection ring 17a, the 2nd lower connection ring 16b, the 2nd bundle material 3b, and the 2nd upper connection ring 17b and the delivery of the steel wire 8 are substantially the same as what was already demonstrated. Therefore, the description is omitted here. As a result, the steel wire 8 eventually reaches the vicinity of the center of the gantry 4 while being repeatedly bent at each connecting ring 15 or the like.

  Then, the steel wire 8 that hangs down from the second upper connecting ring 17b and reaches the vicinity of the center of the gantry 4 is connected so as to support the central receiving base 22 of the swing mechanism 6 described above. Here, the swing mechanism unit 6 is suspended from the pedestal upper surface 22a of the center pedestal 22, and has a support 24 formed so that at least a part protrudes from the ring upper surface 23 of the foundation ring 15 or the like. A building connecting portion 5 connected to the upper end 24a and connected to a part of the building H is provided.

  Then, when the swinging mechanism unit 6 is connected to the steel wire 8, the swinging mechanism unit 6 is supported in a swingable manner in the vicinity of the gantry center C. Here, in the seismic isolation device 1 of the present embodiment, the two steel wires 8 are used to support the center cradle 22 in a suspended manner. That is, as described above, the second bundle members 3a and 3b described above are arranged in accordance with the positions of the four first bundle members 2 connected to the gantry 4 at equal intervals. Therefore, another set of bundle members is opposite to the center C (180 ° opposite) so as to face one set of bundle members (a combination of the first bundle 2 and the second bundles 3a and 3b). (See FIG. 2 etc.). Therefore, in the seismic isolation device 1 of the present embodiment, the bundle material groups facing each other are connected by a single steel wire 8. For this reason, the bottom surface 25 of the center receiving base 22 is supported by the steel wire 8 from below, and the two steel wires 8 are orthogonal to each other at the center of the bottom surface 25 (not shown).

  Here, the gantry support ring 7, the outer connecting ring 15, the lower connecting rings 16a and 16b, and the upper connecting rings 17a and 17b described above are formed by bending a rod-shaped steel material into a perfect circle shape. These rings 15 and the like are constructed as rigid bodies having rigidity capable of elastic deformation with respect to a load. Therefore, when the ground G swings due to an earthquake and a strong load (arrows P and Q in FIG. 2) is applied to the ring 15 or the like so as to compress the ring 15 or the like toward the center of the ring, the load is applied. The outer connecting ring 15 and the upper connecting ring 17a connected to the obtained first bundle 2 and the second bundle 3a, 3b are reduced in diameter as shown by the broken line D in FIG. Then, the bundle member 2 and the like are deformed so that the diameter is increased. On the other hand, the lower connecting ring 16a and the like connected to the bundle 2 and the like are deformed so that the diameter of the portion of the bundle 2 and the like is reduced and the diameter of the bundle 2 and the like is reduced, contrary to the above deformation. (Not shown). 2 shows only the outer connecting ring 15 for the sake of simplicity of explanation, the deformation has occurred for all the rings 15 except the gantry support ring 7. Thereafter, when the force from the direction in which the load is applied is released, the deformed ring 15 or the like can return to the original perfect circle shape by applying a force in a direction opposite to that when the load is applied due to rigidity. As a result, the rigid ring 15 or the like can also be used to buffer the swing caused by the earthquake and prevent the earthquake energy from being transmitted to the building H. That is, the seismic isolation device 1 of the present embodiment has the rigidity of the seismic isolation device 1 itself as well as the above-described ring 15 or the like and the steel wire 8 suppressing the swing of the ring 15 due to the movement (shift) in the substantially horizontal direction. It is possible to absorb the energy related to the used swinging.

  Furthermore, the steel wire 8 used for the seismic isolation device 1 of this embodiment is made of a material that can be elastically deformed by the steel wire itself. As a result, when the seismic isolation device 1 suppresses the swing due to the earthquake and suppresses the swing from being transmitted to the building H, the steel wire 8 that is subjected to a strong load is elastically deformed and expanded or contracted. Is formed. As a result, it is possible to suppress rocking due to an earthquake to some extent even by elastic deformation of the steel wire 8. As a result, the seismic energy can be absorbed by the expansion / contraction of the steel wire 8 as well as the seismic energy absorption utilizing the rigidity of the ring 15 of the seismic isolation device 1 itself.

  Next, an example of suppression of the rocking | swiveling by the earthquake using the seismic isolation apparatus 1 of this embodiment is demonstrated mainly based on FIG.3 and FIG.5. Here, FIG. 3 shows an initial state in which no shaking is caused by an earthquake. Then, when an earthquake occurs and a swing occurs in a substantially horizontal direction (see arrow A in FIG. 5), the swing transmitted to the first bundle 2 through the gantry 4 is bent by the outer connecting ring 15 and droops. The steel wire 8 is transmitted to the first lower connecting ring 16a and the second bundle 3a. At this time, only the steel wire 8 exists between the outer connecting ring 15 and the first lower connecting ring 16a, and the first lower connecting ring 16a is suspended and supported by the steel wire 8. Therefore, the swing transmitted through the gantry 4 is not directly transmitted to the first lower connection ring 16a, but the first lower connection ring 16a is substantially like a pendulum with the outer connection ring 15 as an axis. It will move in the horizontal direction. On the other hand, since the second bundle 3a connected to the first lower connecting ring 16a is arranged so as to maintain the inclination angle θ with the first bundle 2, the first bundle connected to the upper end 14 of the bundle. Similarly, the upper connecting ring 17a moves in a substantially horizontal direction. In the same manner, the second lower connecting ring 16b, the second bundle 3b, and the second upper connecting ring 17b are acted on. As a result, as shown in FIG. 5, the ring 15 or the like is biased to one side with respect to the substantially horizontal swinging direction. At this time, the central swinging mechanism portion 6 suspended and supported by the seismic isolation portion 9 and the steel wire 8 only moves slightly in the horizontal direction according to the bias of the ring 15 and the like. Therefore, it can suppress that the building H connected with this rocking | fluctuation mechanism part 6 rock | fluctuates greatly by an earthquake.

  Furthermore, the seismic isolation device 1 according to the present embodiment is formed as a rigid body having rigidity capable of elastically deforming the ring 15 and the like and the steel wire 8 together with suppressing the swing due to the movement of the ring 15 and the like described above. Thus, the vibration caused by the earthquake can be buffered by the elastic deformation of itself. As a result, the swing related to the swing mechanism portion 6 is not transmitted, and the swing can be almost insulated.

  Furthermore, the seismic isolation device 1 according to the present embodiment supports the building H by the swing mechanism 6. Therefore, the weight of the building H is entirely applied to the center receiving base 22 of the swinging mechanism unit 6. Therefore, even if an earthquake occurs and the swinging mechanism unit 6 swings in a substantially horizontal direction as shown in FIG. 5, if the shaking due to the earthquake subsides, the swinging mechanism unit 6 returns to its original state (see FIG. 3). ) Works to return by the weight of the building H. Therefore, compared with a conventional seismic isolation device supported by a so-called “rolling bearing” such as a ball bearing, maintenance after an earthquake does not need to be performed. That is, since the building H naturally returns to its original state due to its own weight, it can cope with the next earthquake.

  The present invention has been described with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention as described below. And design changes are possible.

  That is, in the seismic isolation device 1 of the present embodiment, the one that uses the single seismic isolation device 1 to suppress the swinging of the building H due to the earthquake is shown, but of course is not limited to this. By constructing a plurality of seismic isolation devices 1 for a general timber house, a strong seismic isolation effect can be achieved even for larger earthquakes.

  Furthermore, using a plurality of seismic isolation devices 1 of the present embodiment, as shown in FIGS. 6 (a) and 6 (b), the seismic isolation devices 1 are stacked in the vertical direction, and the building H and the ground G It may be interposed between the two. Thereby, the outstanding rocking | fluctuation effect by the seismic isolation apparatus 1 of this embodiment can be further enjoyed. Specifically, the structure connecting portion 5 of one seismic isolation device 1 is connected to the base 4 of the other seismic isolation device 1 (see FIG. 6A), or one of the seismic isolation devices 1 Invert the top and bottom of the other seismic isolation device 1 to the building connecting portion 5, connect the building connecting portions 5 to each other, and further connect a part of the building H to the gantry 4 of the other seismic isolation device 1. It may be a thing (refer FIG.6 (b)). Here, the construction examples shown in FIGS. 6A and 6B correspond to the construction method of the seismic isolation device of the present invention.

  Furthermore, in the seismic isolation device 1 according to the present embodiment, the number of the first bundle material 2 and the second bundle material 3a, etc., which are four at 90 ° intervals, is shown. However, the present invention is not limited to this. However, it is possible to appropriately change these according to the own weight (load) of the building H to be seismically isolated and the magnitude of the corresponding earthquake. Further, as the seismic isolation part 9, the one that obtains the seismic isolation effect by using a bundle material group consisting of three bundles 2, 3a, 3b is shown, but is not limited to this, and resists weak earthquakes. If it is only intended to do this, it is sufficient to connect the steel wire 8 directly from the outer connecting ring 15 to the center pedestal 22 of the swinging mechanism portion 6, while on the other hand, resisting a stronger earthquake. If it is intended, the number of second bundle members 3a and the like provided between the outer connecting ring 15 and the center cradle 22 and the number of upper connecting rings and lower connecting rings may be appropriately increased. As a result, the range of earthquake oscillation that can be suppressed by the ring 15 or the like can be expanded, and the risk of collapse of a house or the like can be reduced even when a large earthquake occurs.

  Moreover, when strong winds or the like hit the building, in the above-described seismic isolation device 1, the swing mechanism 6 is suspended by the steel wire 8 so that it can swing freely. There is a possibility of moving. Therefore, a buffering mechanism such as a damper having elasticity in the horizontal direction may be provided so that the seismic isolation device 1 of the present embodiment only acts on a certain amount of swinging. Further, by imparting a vertically extendable function to the support column 24 of the swing mechanism unit 6, it is possible to prevent the swing (vibration) applied in the vertical direction from being transmitted to the building H. Furthermore, in the seismic isolation device 1 of the present embodiment, the outer coupling ring 15 and the upper coupling rings 17a and 17b are shown in which the positions of the ring upper surfaces 23 are matched, but the present invention is not limited to this. The height of each ring 15 or the like may be changed. That is, it may be configured to have a stepped shape when viewed from the side so that the height of the ring upper surface 23 such as the upper coupling ring 17a is gradually increased from the outside toward the inside. Alternatively, the innermost ring upper surface 23 may be the lowest so that the height of the ring upper surface 23 is gradually decreased from the outside toward the inside.

It is a front view which shows the structure of the seismic isolation apparatus of this embodiment. It is a front view which shows the structure of a seismic isolation apparatus. It is sectional drawing which shows the structure of a seismic isolation apparatus. It is (a) top view and (b) front view which show the composition of the 1st bundle material and the 2nd bundle material. It is explanatory drawing which shows typically an example of suppression of the rocking | swiveling by a seismic isolation apparatus. It is explanatory drawing which shows typically (a) 1st construction example using a seismic isolation apparatus, (b) 2nd construction example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seismic isolation device 2 1st bundle material 3a, 3b 2nd bundle material 4 Mount 5 Building connection part 6 Vibration mechanism part 7 Mount support ring 8 Steel wire 9 Seismic isolation part 10 Ring-bundle group 13 Bundle material lower end 14 Bundle Material upper end 15 Outer connection ring 16a First lower connection ring (lower connection ring)
16b Second lower connection ring (lower connection ring)
17a First upper connection ring (upper connection ring)
17b Second upper connection ring (upper connection ring)
19 Bundle material surface 20 Bundle material back surface 21 Through hole 22 Center pedestal 23 Ring upper surface 24 Column 24a Column upper end C Frame center G Ground H Building θ Inclination angle

Claims (6)

A seismic isolation device interposed between a building and the ground,
A gantry fixed to the ground;
A ring-shaped gantry support ring connected and supported above the gantry; and
At least three or more first bundle members whose lower ends are connected to the mount support ring while maintaining a predetermined inclination angle toward the mount center;
A ring-shaped outer connecting ring connected so as to bridge between the upper ends of the respective bundle members of the first bundle member;
One end is fixed in the vicinity of the gantry, and is supported obliquely upward from the lower end of the bundle member to the upper end of the bundle member along the longitudinal direction of the first bundle member, and substantially vertically downward from the outer connection ring. A steel wire that bends and hangs down,
A center cradle supported by the suspended steel wire so as to be swingable inside and below the outer connection ring, and provided so that at least one end protrudes from the center cradle from the ring upper surface of the outer connection ring. A support mechanism, and a swing mechanism provided with a building connection part connected to a part of the building, provided at the upper end of the support column.
At least one of the gantry support ring and the outer connecting ring is formed with rigidity capable of elastic deformation with respect to a load. Seismic isolation having at least one ring-bundle member group interposed between the outer connecting ring and the central pedestal of the swing mechanism and having a lower connecting ring, a second bundle member, and an upper connecting ring. Further comprising
The seismic isolation part is
The lower connecting ring in the form of a ring provided below the inner connecting ring or the upper connecting ring;
The lower connecting ring and the lower end of the bundle material are connected, and at least three or more second bundle members attached to the lower connecting ring while maintaining the inclination angle toward the gantry center;
It is configured to have the ring-shaped upper connection ring connected so as to bridge between the upper ends of the respective bundle members of the second bundle member,
The steel wire suspended from the outer connecting ring or the upper connecting ring is:
Bent by the lower connection ring, supported diagonally upward from the lower end of the bundle to the upper end of the bundle along the longitudinal shape of the second bundle, and suspended from the upper connection ring in a substantially vertical direction to receive the center support. To the base or the lower connecting ring,
2. The seismic isolation device according to claim 1, wherein at least one of the lower connection ring and the upper connection ring is formed to have rigidity capable of elastic deformation with respect to a load. The steel wire is
The seismic isolation device according to claim 1, wherein the seismic isolation device is formed to have rigidity capable of elastic deformation with respect to a load. The first bundle and the second bundle are
Penetrates the surface of the bundle material and the back surface of the bundle material near the center, and has a through hole into which the steel wire can be inserted,
When the steel wire is supported obliquely upward by the first bundle material or the second bundle material, the steel wire is inserted into the through hole, and the length of the first bundle material or the second bundle material is The seismic isolation device according to claim 2 or 3, wherein the steel wire is supported so as to cross the shape. The gantry support ring, the outer connection ring, the lower connection ring, and the upper connection ring are:
The seismic isolation device according to any one of claims 2 to 4, wherein the seismic isolation device is formed in a concentric shape having a substantially circular shape. A construction method for the seismic isolation device according to any one of claims 1 to 5,
The building connection part of the other seismic isolation device is connected to the building connection part of the swing mechanism part of the one seismic isolation device, or the building of the swing mechanism part of the one seismic isolation device. The other seismic isolation device is turned upside down on the connecting portion, the building connecting portions are connected to each other, and two or more seismic isolation devices are stacked between the ground and the building. The construction method of the seismic isolation apparatus characterized by doing.

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