JP4722531B2 - Seismic isolation devices, buildings using seismic isolation devices - Google Patents

Description

The present invention relates to a seismic isolation device that reduces vibration caused by an earthquake and a building using the seismic isolation device .

  The foundation of the house and the foundation installed on the foundation are important structural parts for supporting the house. As shown in FIG. 7, these foundations and foundations are fixed by fixing anchor foundations 100 made of concrete laid on gravel or the like and foundations 101 placed on the foundations 100 with anchor bolts 102. Basic foundation method is used.

  In such a foundation driving method, the foundation 100 and the base 101 are strongly fixed by the anchor bolts 102. Therefore, when a strong impact such as an earthquake is received, the impact is directly applied to the base 100 or the base 101, and the base 100 made of concrete which is weak against the impact is cracked, or the base 101 made of low-strength wood is formed. It was easy to break.

In order to alleviate such a strong impact caused by an earthquake, an earthquake-resistant reinforcing metal fitting that is attached across the foundation 100 and the base 101 has been proposed (for example, see Patent Document 1).
JP-A-2005-36615

  When the earthquake-proof reinforcing metal fitting as in Patent Document 1 is used, the impact is reduced, but the impact is not sufficiently reduced because the foundation 100 and the base 101 are in direct contact.

  In addition, not only houses but also furniture fixed with metal fittings etc. for earthquake resistance, it is necessary to mitigate the impact caused by earthquakes and the like.

The present invention, in consideration of the conventional problems described above, the impact caused by an earthquake or the like, and an object thereof to provide Hisage more relaxed seismic isolation device capable of, Buildings by seismic isolation device.

In order to solve the above problems, the first present invention provides:
Vibration detecting means for detecting vertical and / or left and right vibrations caused by an earthquake;
Levitating means provided at a predetermined position between the object and the table, and levitating the object from the table by a magnetic force;
And control means upon detection of a vibration due to an earthquake, for operating said floating means by said vibration detection means,
A fixing means for fixing the object and the base when an earthquake has not occurred,
The levitation means is
A magnet provided on one of the object and the base, and a magnet provided on the other side, facing the magnet,
At least one of the magnets is an electromagnet,
Each of the magnets has a flat portion facing the other,
When an earthquake does not occur, the end portion of one of the plane portions is located outside the other plane portion in a direction substantially parallel to the ground from the corresponding end portion of the plane portion. And
The magnet or the electromagnet has an edge provided in a substantially vertical direction with respect to the planar portion toward the other side at an end portion of the one planar portion located on the outer side. ,
The vertical length of the edge portion with respect to the planar portion is longer than the height of the floating portion by the floating means,
The levitating means also serves as the fixing means,
The said control means is a seismic isolation apparatus which controls an electric current so that the pole of the said electromagnet may become opposite when the said vibration is detected and when the said vibration is not detected .

The second aspect of the present invention is
It is a building provided with the seismic isolation device of the first aspect of the present invention.

According to the present invention, an impact caused by an earthquake or the like, the seismic isolation device capable of more relaxed, it is possible to provide a building with a seismic isolation device.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
While explaining the seismic isolation apparatus in Embodiment 1 concerning this invention, the building using the seismic isolation apparatus of this invention is also demonstrated simultaneously.

  FIG. 1 shows a cross-sectional configuration diagram of a house to which a seismic isolation device according to Embodiment 1 of the present invention is attached.

  As shown in FIG. 1, the house according to the first embodiment includes a house body 1 and a foundation 2 made of concrete. The house body 1 includes a base 3, a roof 4, and a pillar 5. This base 3 is placed on the foundation 2. In addition, the space | interval of the foundation 2 and the base 3 is opened and opened for description.

  Below the base 3, electromagnets 6 are installed at a plurality of locations. Moreover, the magnet 7 is installed in the location of the foundation 2 facing the location where the electromagnet 6 is installed. The base 3 is provided with an accelerometer 8, which is an example of the vibration detection means of the present invention. Control means 9 is provided for controlling the plurality of electromagnets 6 by detecting vibrations by the accelerometer 8.

  FIG. 2 shows a partially enlarged configuration diagram of the electromagnet 6 and the magnet 7 shown in FIG. As shown in FIG. 2, the electromagnet 6 has an iron core 10 and a conductive wire 11 wound around the iron core 10. The iron core 10 is fixed by being partially embedded in the base 3.

  Further, the electromagnet 6 has a flat portion 6 a at a portion facing the foundation 2. The magnet 7 also has a flat surface portion 7a at a portion facing the flat surface portion 6a. These flat portions 7a and 6a are substantially circular when viewed from above. Further, an edge 6c is formed on the peripheral edge 6b of the flat portion 6a in a direction substantially perpendicular to the flat portion 6a and toward the base 2 side. Further, the flat portions 6a and 7a are formed so that the distance l between the peripheral edge 6b and the peripheral edge 7b is 18 cm or more in a state where the centers of the flat surface portion 6a and the flat surface portion 7a substantially coincide. Further, the length m of the edge 6c in the direction perpendicular to the flat portion 6a is longer than the flying distance n by the magnetic force of the electromagnet 6 and the magnet 7.

  The levitation means of the present invention corresponds to, for example, the electromagnet 6 and the magnet 7 in the first embodiment. The end portion of the present invention corresponds to, for example, the peripheral edge 6b or 7b in the first embodiment.

  While operation | movement of the seismic isolation apparatus in this Embodiment 1 of the said structure is demonstrated, operation | movement of the building provided with the seismic isolation apparatus of this invention is also demonstrated simultaneously.

  When an earthquake does not occur, a plurality of electromagnets 6 are energized, and the electromagnets 6 are fixed by attracting the corresponding magnets 7. For example, when the flat portion 7a side of the magnet 7 has an N pole, the direction of current is controlled so that the flat portion 6a of the electromagnet 6 has an S pole.

  Next, when an earthquake occurs, vibration is detected by the accelerometer 8. A signal that detects this vibration is sent to the control means 9, and the control means 9 performs control so that electricity flows to the plurality of electromagnets 6 in the direction opposite to that when no earthquake has occurred. Here, for example, when the flat surface portion 7a side of the magnet 7 has an N pole, energization is performed in such a direction that the flat surface portion 6a of the electromagnet 6 also has an N pole. For this reason, the electromagnet 6 and the magnet 7 repel, and the house main body 1 floats.

  Further, when the earthquake ends and no vibration is detected by the accelerometer 8, control is performed so as to gradually weaken the current flowing through the conducting wire 11. As a result, the house body 1 gradually falls and is placed on the foundation 2.

  Finally, electricity is passed through the electromagnet 6 so that the magnet 7 and the electromagnet 6 attract each other.

  In this way, during the occurrence of the earthquake, the house body 1 floats from the foundation 2 and vibrations are not transmitted directly to the house body 1, so that vibrations caused by the earthquake can be mitigated.

  The fixing means that also serves as the levitation means of the present invention corresponds to, for example, the electromagnet 6 and the magnet 7 of the first embodiment. When an earthquake does not occur by this fixing means, the electromagnet 6 and the magnet 7 are positively fixed, so the house body 1 is firmly fixed to the foundation 2 and is safe against storms such as typhoons. It is. It should be noted that a means for measuring the wind speed may be further provided without fixing at all times, and the electromagnet 6 may be energized and fixed with the magnet 7 when the wind speed exceeds a predetermined level.

  Moreover, in the seismic isolation device of the first embodiment, the distance between the peripheral edge 7b and the edge 6c is configured to be 18 cm or more. This 18 cm is the maximum roll displacement at the time of the Great Hanshin-Awaji Earthquake. Yes, even if an earthquake of the magnitude of the earthquake occurs, the vertical positions of the magnet 7 and the electromagnet 6 are not completely displaced. Furthermore, since the length m of the edge 6c in the direction perpendicular to the flat surface 6a is longer than the flying distance n by the magnetic force of the electromagnet 6 and the magnet 7, for example, when a swing of 18 cm or more comes. In addition, since the side surface of the magnet 7 and the edge 6c interfere with each other, it is possible to prevent the vertical position of the magnet 7 and the electromagnet 6 from being shifted.

  In the seismic isolation device of the first embodiment, the electromagnet 6 is installed on the foundation 2 and the magnet 7 is installed on the base 3, but may be installed in reverse.

  In the seismic isolation device of the first embodiment, the plane portion 6a of the electromagnet 6 has a larger area than the plane portion 7a of the magnet 7 and further has an edge portion 6c. The direction may be larger than the plane part 6a, and the edge part may be formed.

  Moreover, in the seismic isolation device of the first embodiment, the electromagnet 6 is used on one side and the magnet 7 is used on the other side, but both may use electromagnets. Furthermore, a superconducting magnet may be used instead of an electromagnet.

  Further, in the side view of FIG. 1, the electromagnet 6 and the magnet 7 are installed at both ends and the center of the base 3. However, the present invention is not limited to this configuration. In short, the house body 1 is levitated from the foundation 2. All you need to do is However, from the viewpoint of the strength of the house body 1, the electromagnet 6 and the magnet 7 are preferably installed at least below the column 5, and are preferably installed so that the bottom surface of the house body 1 is lifted up evenly. .

  In the first embodiment, the planar portions 7a and 6a have been described as being substantially circular. However, the present invention is not limited to a circular shape, and for example, one of the planar portions may be a rectangular shape. It is only necessary that the end portion is located 18 cm or more from the corresponding end portion of the other plane portion and outside the other plane portion. An example of this is shown in FIG. FIG. 3 is a plan view when the electromagnet 6 is looked down at the magnet 7 from above. As shown in FIG. 3, the plane portion 7a has a rectangular shape, and the plane portion 6a has distances t and s corresponding to the end portions 6d and 6e and the end portions 7d and 7e of the other plane portion 7a. Both are formed in a shape of 18 cm or more.

  Although not described in the first embodiment, it is conceivable that when an earthquake occurs, it is possible that electricity will not be transmitted. Therefore, it is more preferable to store power with a battery or the like.

  In the seismic isolation device of the first embodiment, the distance between the peripheral edge 7b and the peripheral edge 6b has been described as 18 cm or more. However, although not limited to the distance of the present embodiment, for example, it is constructed on furniture or the like placed in a room on the upper floor of a building that is easily shaken by an earthquake, or on ground that is shaken by an earthquake. When the seismic isolation device of the present embodiment is applied to a house or the like that is present, it is preferable to make the distance between the peripheral edge 7b and the peripheral edge 6b longer than 18 cm. In addition, for houses that are built on ground where shaking due to an earthquake is relatively mild, the distance may be shortened, the object to which the seismic isolation device of this embodiment is applied, and the place to be applied. Thus, the distance can be appropriately changed.

(Embodiment 2)
Hereinafter, the seismic isolation device according to Embodiment 2 which is an example of the invention related to the present invention will be described, and a building using the seismic isolation device of the related invention will also be described simultaneously.

  FIG. 4 is a partial configuration diagram of a house to which the seismic isolation device according to the second embodiment is attached. As shown in FIG. 4, the seismic isolation device of the second embodiment has the same basic configuration as that of the first embodiment, but is provided with a fixing means 30 separately from the first embodiment. Is different. Therefore, this difference will be mainly described. In addition, the same code | symbol is attached | subjected to the same component.

  As shown in FIG. 4, the seismic isolation device according to the second embodiment includes a plurality of fixing means 30 for fixing the foundation 2 and the base 3. Further, instead of the control means 9 described in the first embodiment, a control means 34 for controlling the fixing means 30 together with the electromagnet 6 based on the accelerometer 8 is provided.

  FIG. 5A is a cross-sectional configuration diagram showing a state in which the foundation 2 and the base 3 are fixed by the fixing means 30, and FIG. 5B is a view in which the foundation 2 and the base 3 are fixed by the fixing means 30. It is a section lineblock diagram showing the state where it is not done.

  As shown in FIG. 5 (a), the fixing means 30 is inserted into a hole 33 provided in the foundation 2, a rod-shaped member 31 that fixes the foundation 2 and the base 3, and an electromagnetic coil 32 attached to the base 3. And have. By supplying electricity to the electromagnetic coil 32, the rod-shaped member 31 is accommodated in the electromagnetic coil 32. FIG. 5B shows this state.

  The operation of the seismic isolation device in the second embodiment will be described below.

  When an earthquake has not occurred, the bar-shaped member 31 is inserted into the hole 33 of the foundation 2 as shown in FIG.

  Next, when an earthquake occurs, vibration is detected by the accelerometer 8 and the electromagnetic coil 32 is energized. By energizing the electromagnetic coil 32, the rod-shaped member 31 is drawn into the electromagnetic coil 32, and the fixation between the foundation 2 and the base 3 is released.

  Then, a plurality of electromagnets 6 are energized so as to repel the magnets 7, and the house main body 1 rises.

  Further, when the earthquake ends and no vibration is detected by the accelerometer 8, control is performed so as to gradually weaken the current flowing through the conducting wire 11. As a result, the house body 1 gradually falls and is placed on the foundation 2.

  Next, by stopping energization of the electromagnetic coil 32, the rod-shaped member 31 falls and is inserted into the hole 33.

  In the second embodiment, the electromagnetic coil 32 is provided on the base 3 side, but may be provided on the foundation 2 side. However, in this case, when the earthquake does not occur, it is necessary to keep the rod-shaped member 31 positioned upward, and therefore it is necessary to always energize the electromagnetic coil 32. For this reason, the electric power is increased as compared with the seismic isolation device of the second embodiment.

  In the second embodiment, the rod-shaped member 31 is inserted into the hole 33 by natural dropping. However, the rod-shaped member 31 may be positively pushed out of the electromagnetic coil 32 by flowing an electric current in the opposite direction.

  An example of the extraction means of the present invention corresponds to the electromagnetic coil 32 of the second embodiment, but is not limited to this configuration, and for example, the motor and a rod-shaped member are linked to be extracted toward the foundation 2 or the base 3 side. In short, it is sufficient that the rod-shaped member can be pulled out to the foundation or the base side when vibration is detected.

(Embodiment 3)
Below, the attachment method of the seismic isolation apparatus in Embodiment 3 concerning this invention is demonstrated. As this seismic isolation device, the seismic isolation device described in the first embodiment is used.

  FIG. 6A is a cross-sectional view of an existing house. As shown in FIG. 6A, the existing house has a substantial space between the foundation 2 and the base 3 in order to fix the house body 1. Anchor bolts 50 are inserted perpendicular to the upper ground.

  The anchor bolt 50 is cut at a boundary portion 50a between the foundation 2 and the base 3 (corresponding to an example of a cutting process of the present invention).

  Then, as shown in FIG. 6B, the house body 1 is lifted with a jack or the like, and a space is provided between the foundation 2 and the base 3 (corresponding to an example of the step of lifting the base of the present invention). .

  Subsequently, the electromagnet 6 and the magnet 7 described with reference to FIGS. 1 and 2 are respectively attached to the base 3 and the foundation 2 as shown in FIG. 6C (corresponding to an example of the attachment process of the present invention).

  Finally, the house body 1 is placed on the foundation 2 again with a jack or the like.

  With the above attachment method, the seismic isolation device described in the first embodiment can be attached to an existing house.

  In addition, although an example of the building of this invention is corresponded to the house of Embodiment 1-3, a warehouse or a storeroom may be sufficient.

  An example of the object of the present invention corresponds to the house main body 1 according to the first to third embodiments, and an example of the base of the present invention corresponds to the foundation 2, but is not limited to this configuration. As another example of the table, furniture and a floor may be used.

  The seismic isolation device of the present invention has an effect capable of further mitigating shocks caused by earthquakes, etc., and is particularly useful as a seismic isolation device used for buildings and the like, and can also be applied to existing buildings. It is.

Sectional block diagram of the house which attached the seismic isolation apparatus in Embodiment 1 concerning this invention Cross-sectional block diagram of the seismic isolation apparatus in Embodiment 1 concerning this invention The top view which shows an example of the electromagnet of the seismic isolation apparatus in Embodiment 1 concerning this invention, and the plane part of a magnet Partial sectional view of a house with attached seismic isolation device in the implementation of Embodiment 2 is an example of the invention relating to the present invention (A) cross-sectional view showing a state in which the foundation and the foundation is fixed by fixing means isolator in FIG. 4, is released basis and foundation fixed by the fixing means isolator in (b) FIG. 4 Cross-sectional configuration diagram showing the state (A) Cross-sectional block diagram for explaining the mounting method of the seismic isolation device according to the third embodiment of the present invention, (b) For explaining the mounting method of the seismic isolation device according to the third embodiment of the present invention. Cross-sectional block diagram, (c) Cross-sectional block diagram for explaining a method of mounting the seismic isolation device in Embodiment 3 according to the present invention Partial sectional configuration diagram of a conventional house

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 House body 2 Foundation 3 Base 4 Roof 5 Pillar 6 Electromagnet 7 Magnet 8 Accelerometer 9 Control means 10 Iron core 11 Conductor

Claims (2)

Vibration detecting means for detecting vertical and / or left and right vibrations caused by an earthquake;
Levitating means provided at a predetermined position between the object and the table, and levitating the object from the table by a magnetic force;
And control means upon detection of a vibration due to an earthquake, for operating said floating means by said vibration detection means,
A fixing means for fixing the object and the base when an earthquake has not occurred,
The levitation means is
A magnet provided on one of the object and the base, and a magnet provided on the other side, facing the magnet,
At least one of the magnets is an electromagnet,
Each of the magnets has a flat portion facing the other,
When an earthquake does not occur, the end portion of one of the plane portions is located outside the other plane portion in a direction substantially parallel to the ground from the corresponding end portion of the plane portion. And
The magnet or the electromagnet has an edge provided in a substantially vertical direction with respect to the planar portion toward the other side at an end portion of the one planar portion located on the outer side. ,
The vertical length of the edge portion with respect to the planar portion is longer than the height of the floating portion by the floating means,
The levitating means also serves as the fixing means,
The seismic isolation device , wherein the control means controls the current so that the poles of the electromagnet are opposite when the vibration is detected and when the vibration is not detected .   A building comprising the seismic isolation device according to claim 1.

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