JPH09264079A - Base isolation device in wooden construction building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of damage, falling or destruction by absorbing shocks and vibrations of earthquake to thereby reduce swing or rock of building itself. SOLUTION: A plurality of compression springs 4 are arranged between a pair of upper and lower steel plates 3 in a block body made of synthetic resin having an elasticity and the upper and lower ends of the springs 4 are fixed to steel plates 3 to thereby form a base isolation main body of a base isolation device 1. This device 1 incorporating the main body is placed on concrete foundation by means of anchor bolt inserted in insertion hole formed passing through the upper and lower parts of the concrete foundation such that after a base is layed on the device 1 a washer and a nut are set on a protruding end of the bolt from the base and threadedly engaged therewith, then the base and the device 1 are fastened to the concrete foundation and the device 1 is interposed between the concrete foundation and the base.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device for a wooden building which prevents collapse and destruction of the wooden building due to an earthquake.

[0002]

2. Description of the Related Art Conventionally, in a wooden building, as shown in FIG. 5, an upper end portion of an anchor bolt a projecting from the upper surface of a concrete foundation b is inserted into an insertion hole d vertically formed at an appropriate position of a base c. The base c is placed directly on the concrete foundation b as it is inserted, and the washer e and the nut n are attached to the projecting end of the anchor bolt a and screwed to tightly connect the base c to the concrete foundation b. Since they are integrated together, there is a drawback that the shock, vibration, etc. of an earthquake are transmitted to the framework of a wooden building as they are, and in the case of a conventional wooden building, there are braces, bearing walls, etc. Only by making heavy use of the frame to solidify it and making it a structure that can withstand impacts from earthquakes, the building itself shakes like the vibration of the ground, so in the event of a large-scale earthquake the building collapses and is destroyed. Could not be prevented

[0003]

SUMMARY OF THE INVENTION The present invention is intended to provide a seismic isolation device for a wooden building, which is designed to absorb and absorb shock and vibration caused by an earthquake to prevent the building from being destroyed or collapsed. is there.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the problem that a wooden building having a base directly disposed on a foundation cannot mitigate or absorb shocks and vibrations caused by an earthquake, based on the above-mentioned prior art.
A plurality of compression springs were arranged between a pair of upper and lower steel plates on an elastic synthetic resin block body along the outer peripheral edge of the steel plates, and the upper and lower ends of the compression springs were fixed to the steel plate. The seismic isolation main unit is built into the seismic isolation device,
The through hole of the anchor bolt in the concrete foundation is vertically penetrated so that the anchor bolt is inserted through the through hole, and the seismic isolation device is placed on the concrete foundation, and the base is placed on the seismic isolation device. After laying so that the anchor bolt can be inserted through the insertion hole penetrating the base, attach the washer and nut to the protruding end of the anchor bolt, screw it, and tightly connect the base and seismic isolation device to the concrete foundation, Moreover, by interposing a seismic isolation device between the concrete foundation and the foundation, vibrations due to the earthquake are attenuated and transmitted to the building, thereby solving the above problems.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1, 1a ... are seismic isolation devices provided between a concrete foundation B and a base C in a wooden building W, The seismic isolation devices 1, 1a ... are arranged and fixed at appropriate positions on the concrete foundation B, and the base C of the wooden building W is laid and fixed thereon, and the base C is placed on the upper surface of the concrete foundation B. A plurality of anchor bolts A, Aa ... Tightly connected to the concrete foundation B are projected.

As shown in FIGS. 1 and 2, each of the seismic isolation devices 1, 1a ... Has a rectangular parallelepiped block body 2 made of an elastic synthetic resin, and a seismic isolation main body incorporated in the block body 2. 2a, the seismic isolation main body 2a is arranged between the pair of steel plates 3 and 3a arranged in the upper and lower parts of the block body 2 and the steel plates 3 and 3a, and the upper and lower ends are welded to the steel plates 3 and 3a. It is constituted by a plurality of fixed compression springs 4, 4a ... And each seismic isolation device 1, 1a ... Form an insertion portion 5 of the anchor bolt A, Aa.

Further, it is desirable that the raw material of the block body 2 is made by recycling the waste tires and mixed with a synthetic pyrethrin insect repellent such as a pyrethroid insect repellent for controlling harmful insects such as termites. It may be made of a foamed resin having bubbles.

The steel plates 3 and 3a have a horizontally long rectangular shape, and insertion holes 6 and 6a of the anchor bolts A, Aa ... Are provided at appropriate positions on the center line in the longitudinal direction, and the peripheral portions of the insertion holes 6 and 6a are provided. The compression springs 4 and 4a are arranged, and the insertion holes 6 and 6a are formed in the steel plates 3 and 3a, respectively. However, the number is not limited as long as it is on the center line. As shown in b), it may be an elongated hole elongated in the direction of the center line.

Further, the compression springs 4, 4a ... Are high tension coil springs, which are arranged at predetermined intervals along the outer peripheral edge portions of the steel plates 3, 3a, and between the wire rods constituting the compression springs 4, 4a. After the seismic isolation main body 2a is arranged in the mold so that the synthetic resin forming the block body 2 exists in the inner space, the seismic isolation device 1 is prepared by pouring the molten synthetic resin into the mold. 1a ... is manufactured.

Further, the insertion portion 5 of the anchor bolts A, Aa ... Is a through hole in the vertical direction including the insertion holes 6 and 6a in the steel plates 3 and 3a so as to be preformed at the manufacturing stage or at the construction stage. It may be post-formed by a drill (not shown) or the like. In the latter case, the insertion holes 6 and 6a are elongated holes, and each seismic isolation device 1 and 1a.
The positions and shapes of the insertion holes 6 and 6a are displayed on the upper surface of.

The shape of the seismic isolation devices 1, 1a ... Is not limited to a rectangular shape in plan view, and depending on the place of use, as shown in FIG.
It may have a letter shape, a T shape, or a cross shape, and in these cases, the same insertion holes 6 and 6a as those described above are formed in the steel plates 3 and 3a, and particularly in accordance with the shape of the seismic isolation device 1, 1a. It is desirable to use L-shaped, T-shaped or cross-shaped insertion holes 6 and 6a.

Next, the installation work of the seismic isolation device according to the present invention will be described. First, the seismic isolation device 1 is inserted so that the anchor bolts A, Aa ... Are inserted into the insertion portions 5 of the seismic isolation devices 1, 1a. , 1a ... After mounting and fixing on the concrete foundation B,
A base C is laid on the seismic isolation devices 1, 1a ... In such a manner that the anchor bolts A, Aa ... Can be inserted through the insertion holes D penetrating the base C, and the projections of the anchor bolts A, Aa. Attach washer E and nut N to, and as shown in Fig. 4,
Seismic isolation device 1, 1a ... and base C for concrete foundation B
, And seismic isolation devices 1, 1a ... Are provided between the concrete foundation B and the base C.

Next, the operation of the seismic isolation device in the wooden building according to the present invention will be described. The wooden building W on the concrete foundation B is connected to the seismic isolation device 1, 1a ...
… Is placed and fixed on top, and seismic isolation device 1, when an earthquake occurs,
Due to the elastic action of 1a ...
Is transmitted to the wooden structure W to reduce the shaking of the wooden structure W.

[0012]

In summary, the present invention provides a pair of upper and lower steel plates 3,
A plurality of compression springs 4, 4a ... Are arranged along the outer peripheral edge of the steel plates 3, 3a between 3a, and the upper and lower ends of the compression springs 4, 4a ... Are fixed to the steel plates 3, 3a. Since the seismic main body 2a is incorporated in the elastic synthetic resin block body 2, the seismic isolation main body 2a made of metal, that is, the steel plates 3, 3a and the compression springs 4, 4a ... Is isolated from the outside air. Therefore, the rust prevention and corrosion resistance of the steel plates 3, 3a and the compression springs 4, 4a ... Can be improved.

Further, since the seismic isolation main body 2a is incorporated in the block body 2, the synthetic resin forming the block body 2 exists between the wire rods forming the compression springs 4, 4a ... And in the internal space. It is possible to improve the elastic action of the seismic isolation devices 1, 1a ....

Further, since the insertion holes 5 of the anchor bolts A, Aa ... In the concrete foundation C are vertically penetrated, the anchor bolts A, Aa ... In the concrete foundation C can be passed through the seismic isolation devices 1, 1a. As a result, the seismic isolation devices 1, 1a ... Placed on the concrete foundation B are anchor bolts A, Aa ... that penetrate the seismic isolation devices 1, 1a. Aa ... By a washer E and a nut N, which are attached to the projecting end portion and screwed, are clamped and fixed between the concrete foundation B and the foundation C, and the seismic isolation devices 1, 1a are interposed between the concrete foundation B and the foundation C. Therefore, since the vibration of the earthquake is attenuated and transmitted to the wooden building W by the elastic action of the seismic isolation devices 1, 1a, ..., Impact and vibration acting on the wooden building W can be absorbed and alleviated. , Wooden building W It is possible to prevent the destruction and collapse of the.

Further, since the anchor bolts A, Aa ... fixed to the concrete foundation C are different depending on the site, if the insertion hole 5 is a circular hole, the mounting position of the seismic isolation devices 1, 1a. Since 5 is a long hole, the mounting positions of the seismic isolation devices 1, 1a ... With respect to the anchor bolts A, Aa.

A plurality of compression springs 4, 4a ... Are arranged between the pair of upper and lower steel plates 3, 3a along the outer peripheral edge of the steel plates 3, 3a, and the upper and lower ends of the compression springs 4, 4a. The seismic isolation main body 2a fixed to the steel plates 3 and 3a is internally provided in the elastic synthetic resin block body 2, and the insertion holes 5 of the anchor bolts A, Aa ...
The through holes 5 and 6a are formed in the steel plates 3 and 3a so that they can be vertically penetrated, and the positions of the through holes are displayed on the surface of the block body 2. Therefore, the through holes 5 are formed. The part is the through hole 6,
Since the block body 2 is made only of the synthetic resin inside the 6a, the required number of insertion holes 5 corresponding to the fixed positions of the anchor bolts A, Aa ... to the concrete foundation C that differ at each site are provided at the site. You can

Further, it is the seismic isolation devices 1, 1a ... that connect the concrete foundation B and the foundation C, and pests, especially termites, reach the foundation C unless the seismic isolation device 1, 1a ... No, but because the block body 2 mixed the insect repellent,
It is possible to prevent the pests from climbing up from the concrete foundation B side to the base C, which is a great practical effect.

[Brief description of drawings]

FIG. 1 is a plan view of two patterns of a seismic isolation device according to the present invention.

FIG. 2 is an enlarged sectional view taken along the line AA of FIG.

FIG. 3 is a front view of a main part showing an installed state of a seismic isolation device.

FIG. 4 is a plan view of a seismic isolation device having another shape.

FIG. 5 is an enlarged front view of a main part showing a laid state of a conventional base.

[Explanation of symbols]

 2 Block body 2a Seismic isolation main body 3, 3a Steel plate 4, 4a ... Compression spring 5 Insertion hole 6, 6a Insertion hole

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 22, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Detailed description of the invention

[Correction method] Change

[Correction contents]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device for a wooden building which prevents collapse and destruction of the wooden building due to an earthquake.

[0002]

2. Description of the Related Art Conventionally, in a wooden building, as shown in FIG. 7 , an upper end portion of an anchor bolt a projecting on the upper surface of a concrete foundation b is inserted into a through hole d vertically formed at an appropriate position of a base c. The base c is placed directly on the concrete foundation b as it is inserted, and the washer e and the nut n are attached to the projecting end of the anchor bolt a and screwed to tightly connect the base c to the concrete foundation b. Since they are integrated together, there is a drawback that the shock, vibration, etc. of an earthquake are transmitted to the framework of a wooden building as they are, and in the case of a conventional wooden building, there are braces, bearing walls, etc. Only by making heavy use of the frame to solidify it and making it a structure that can withstand impacts from earthquakes, the building itself shakes like the vibration of the ground, so in the event of a large-scale earthquake the building collapses and is destroyed. Could not be prevented

[0003]

SUMMARY OF THE INVENTION The present invention is intended to provide a seismic isolation device for a wooden building, which is designed to absorb and absorb shock and vibration caused by an earthquake to prevent the building from being destroyed or collapsed. is there.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the problem that a wooden building having a base directly disposed on a foundation cannot mitigate or absorb shocks and vibrations caused by an earthquake, based on the above-mentioned prior art.
A plurality of compression springs were arranged between a pair of upper and lower steel plates on an elastic synthetic resin block body along the outer peripheral edge of the steel plates, and the upper and lower ends of the compression springs were fixed to the steel plate. The seismic isolation main unit is built into the seismic isolation device,
The through hole of the anchor bolt in the concrete foundation is vertically penetrated so that the anchor bolt is inserted through the through hole, and the seismic isolation device is placed on the concrete foundation, and the base is placed on the seismic isolation device. After laying so that the anchor bolt can be inserted through the insertion hole penetrating the base, attach the washer and nut to the protruding end of the anchor bolt, screw it, and tightly connect the base and seismic isolation device to the concrete foundation, Moreover, by interposing a seismic isolation device between the concrete foundation and the foundation, vibrations due to the earthquake are attenuated and transmitted to the building, thereby solving the above problems.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. Reference numerals 1, 1a, ... Are seismic isolation devices provided between a concrete foundation B and a base C in a wooden building W. The seismic isolation devices 1, 1a, ... Are arranged and fixed at appropriate positions on the concrete foundation B, and the base C of the wooden building W is mounted on the seismic isolation devices
Are laid and fixed, and a plurality of anchor bolts A, Aa, ... For connecting the base C to the concrete foundation B are projected on the upper surface of the concrete foundation B.

[0006] The seismic isolation devices 1,1a ... Each of the FIG. 1 through FIG.
As shown in FIG. 4 , it is composed of a rectangular parallelepiped block body 2 made of an elastic synthetic resin and a seismic isolation main body 2a in the block body 2. The seismic isolation main body 2a is located above and below the block body 2. Pair of steel plates 3, 3a and the steel plates 3, 3 arranged in the
are arranged between a and a plurality of compression springs 4, 4a ... Having both upper and lower ends welded and fixed to the steel plates 3, 3a, and the seismic isolation devices 1, 1a ... Are anchor bolts A, Aa.
The insertion part 5 of ... Is formed.

Further, it is desirable that the raw material of the block body 2 is made by recycling the waste tires and mixed with a synthetic pyrethrin insect repellent such as a pyrethroid insect repellent for controlling harmful insects such as termites. It may be made of a foamed resin having bubbles.

The steel plates 3 and 3a are formed in a horizontally long rectangular shape, and the through holes 6 and 6a of the anchor bolts A, Aa ... Are provided at appropriate positions on the center line in the longitudinal direction, and the through holes 6 and 6a are surrounded by the through holes. The compression springs 4, 4a are arranged, and the insertion holes 6, 6a are formed in the steel plates 3, 3a, respectively.
The number is not limited as long as it is on the center line.
As shown in, a long hole that is long in the center line direction may be used.

Further, the compression springs 4, 4a ... Are high tension coil springs and are arranged at predetermined intervals along the outer peripheral edges of the steel plates 3, 3a. After the seismic isolation main body 2a is arranged in the mold so that the synthetic resin forming the block body 2 exists in the inner space, the seismic isolation device 1 is prepared by pouring the synthetic resin in a molten state into the mold. 1a ... are manufactured.

Further, the insertion portion 5 of the anchor bolts A, Aa ... Is a through hole in the vertical direction including the insertion holes 6, 6a in the steel plates 3, 3a, and is preformed at the manufacturing stage or as shown in FIG.
As shown in FIG. 4, it may be formed later by a drill (not shown) or the like in the construction stage. In the latter case, the insertion holes 6 and 6a are elongated holes and are formed on the upper surface of each seismic isolation device 1, 1a. The positions and shapes of the insertion holes 6 and 6a are displayed.

[00 11] In addition, the plan view shape of the seismic isolation device 1, 1a ... is not limited to a rectangular shape, the point of use, as shown in FIG. 6,
It may be L-shaped, T-shaped or cross-shaped, and in these cases as well, the same insertion holes 6 and 6a as those described above are formed in the steel plates 3 and 3a, and particularly in accordance with the shape of the seismic isolation device 1, 1a. L-shaped, T
It is desirable to form the insertion holes 6 and 6a in the shape of a letter or a cross.

[00 12] Next will be described. Attaching work of the seismic isolation device according to the present invention, first, the vibration isolating apparatus 1, 1a ... anchor bolt A in the insertion portion 5 of, as inserting the Aa ..., the isolator After mounting and fixing 1, 1a on the concrete foundation B, the base C is mounted on the seismic isolation device 1, 1a, and the anchor bolts A, Aa are inserted through the insertion holes D penetrating the base C. Laying in this manner, and attaching washers E and nuts N to the projecting ends of the anchor bolts A, Aa ..., As shown in FIG. 5 , seismic isolation devices 1, 1a. At the same time, seismic isolation devices 1, 1a ... Are provided between the concrete foundation B and the base C.

[00 13] Next, to explain the action of the seismic isolation system in wooden building according to the present invention, wooden buildings W on a concrete foundation B is isolator 1,1a via the base C ...,
3a ... is mounted and fixed on the wooden structure W. When an earthquake occurs, the vibration of the earthquake is attenuated and transmitted to the wooden building W by the elastic action of the seismic isolation devices 1, 1a.

[00 14 ]

In summary, the present invention provides a pair of upper and lower steel plates 3,
A plurality of compression springs 4, 4a ...
Blocks made of synthetic resin having elasticity are provided for the seismic isolation main body 2a which is arranged along the outer peripheral edge of 3a, and the upper and lower ends of the compression springs 4, 4a ... Are fixed to the steel plates 3, 3a. 2, the seismic isolation main body 2a made of metal, that is, the steel plates 3, 3a and the compression springs 4, 4a ... Is isolated from the outside air, so that the steel plates 3, 3a and the compression springs 4, 4a are isolated.
It is possible to improve the rust resistance and corrosion resistance of a.

[00 15] Further, by which the seismic isolation main portion 2a is inherent in block 2, the synthetic resin is present which constitutes between wires constituting the compression spring 4, 4a ... and block 2 in the inner space Therefore, the elastic action of the seismic isolation devices 1, 1a ... Can be improved.

[00 16] In addition, the anchor bolt A in concrete foundation C, since Aa ... insertion hole 5 of the upper and lower penetrated, the relative isolator 1, 1a ... pass through anchor bolt A, Aa ... the in concrete foundation C Seismic isolation devices 1, 1a placed on the concrete foundation B.
... and the anchor bolts A, Aa ... Penetrating the seismic isolation devices 1, 1a ... And the base C thereon, and the anchor bolts A,
Aa ... It is clamped and fixed between the concrete foundation B and the foundation C by a washer E and a nut N which are attached to the projecting end portion and screwed, and the seismic isolation devices 1, 1a are provided between the concrete foundation B and the foundation C.
Since the seismic isolation devices 1, 1a, ... are interposed, the vibration due to the earthquake is attenuated and transmitted to the wooden building W by absorbing the shock and vibration acting on the wooden building W.
It can be mitigated, and the destruction and collapse of the wooden building W can be prevented.

[00 17] In addition, the anchor bolt A with respect to the concrete foundation C, because it varies depending Aa ... fixedly provided position site, although the insertion hole 5 is vibration isolating apparatus 1, 1a ... mounted position of is limited by circular holes, through Since the hole 5 is a long hole, the mounting positions of the seismic isolation devices 1, 1a ... With respect to the anchor bolts A, Aa.

[00 18] Further, a plurality of compression springs 4, 4a ... between the pair of upper and lower steel plates 3, 3a, as well as arranged so as along the outer edge portion of the steel plate 3, 3a, the compression springs 4, 4a ... upper and lower Seismic isolation main body 2a with both ends fixed to steel plates 3 and 3a
Inside the block body 2 made of synthetic resin having elasticity, and the anchor bolt A in the concrete foundation C,
Steel plates 3 and 3a so that the insertion hole 5 of Aa ... can be vertically penetrated.
Since the through holes 6 and 6a in the shape of long holes are formed in the block body 2 and the positions of the through holes are displayed on the surface of the block body 2, the insertion hole 5 is formed inside the through hole 6 and 6a. Since it is made of only the synthetic resin that constitutes the above, it is possible to penetrate the required number of insertion holes 5 corresponding to the fixed positions of the anchor bolts A, Aa ... to the concrete foundation C that differ at each site.

[00 19] In addition, to connect them concrete foundation B and the base C is an isolator 1, 1a ..., pests, unless termites rise crawl isolator 1, 1a ... surface foundation C
However, since the block body 2 is mixed with the insect repellent, it is possible to prevent the pests from climbing up from the concrete foundation B side to the base C, which is a great practical effect.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of drawings]

FIG. 1 is a plan view of two patterns of a seismic isolation device according to the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

[Fig. 4] Seismic isolation device for forming a through hole of an anchor bolt afterwards
FIG.

FIG. 5 is a front view of the main parts showing the installed state of the seismic isolation device.

FIG. 6 is a plan view of a seismic isolation device having another shape.

FIG. 7 is an enlarged front view of an essential part showing a conventional laid state of a base.

[Explanation of reference numerals] 2 block body 2a seismic isolation main body 3, 3a steel plate 4, 4a ... compression spring 5 insertion hole 6, 6a insertion hole

Claims (4)

[Claims] 1. A plurality of compression springs are arranged between a pair of upper and lower steel plates along the outer peripheral edge of the steel plates, and a seismic isolation main body in which both upper and lower ends of the compression springs are fixed to the steel plate is elastic. In a block made of synthetic resin having
Further, a seismic isolation device for a wooden building characterized by vertically inserting through holes for anchor bolts in a concrete foundation. 2. The seismic isolation device for a wooden building according to claim 1, wherein the insertion hole is a long hole. 3. A plurality of compression springs are arranged between a pair of upper and lower steel plates along the outer peripheral edge of the steel plates, and a seismic isolation main body in which both upper and lower ends of the compression springs are fixed to the steel plate is elastic. In a block made of synthetic resin having
Further, it is characterized in that a long hole-shaped through hole is formed in the steel plate and the position of the through hole is displayed on the surface of the block so that the through hole of the anchor bolt in the concrete foundation can be vertically penetrated. Seismic isolation device for wooden buildings. 4. The seismic isolation device for a wooden building according to claim 1, 2 or 3, wherein the block body is mixed with an insect repellent.