JP4312230B2 - Seismic isolation device - Google Patents

Description

  The present invention relates to a seismic isolation device that is installed between a foundation on the ground side and a building and prevents resonance by increasing the natural period of the building at the time of an earthquake. The present invention relates to a seismic isolation device that can be suitably applied to middle- and low-rise buildings.

  Conventionally, as a seismic isolation device for protecting buildings from earthquakes, for example, "Isolators (those that separate vibration from the foundation)", cylindrical stacks in which raw rubber plates and thin steel plates are stacked alternately Rubber is known. However, such laminated rubber is mainly used as a seismic isolation device for heavy-weight structures such as high-rise concrete buildings. However, there was a problem that it was hard in the vertical direction and soft in the horizontal direction, and the shaking of the building during the earthquake could not be absorbed sufficiently.

  In addition, as a seismic isolation device that can be applied to detached houses and low-rise buildings and can keep the construction cost of the foundation relatively low, a foundation for structures consisting of single or multi-stage waste tires is used. It is known (for example, refer to Patent Document 1). Further, a foundation pile (see, for example, Patent Document 2) in which a large number of waste tires are connected in a columnar shape by welding or adhering waste tires adjacent to each other vertically is also known. In both cases, the waste tires are connected to each other by welding or bonding, or a connecting shaft reinforcing material such as a plurality of PC steel wires, and concrete, mortar, or the like is packed as a filler inside the waste tire.

JP 2004-353179 A JP 2004-353178 A

  However, in the techniques described in Patent Documents 1 and 2 as described above, the connection between the upper and lower tires is weak and structurally weak, and the earthquake shake and the building shake (natural period) resonate during an earthquake. When the waste tires stacked in a plurality of stages are deformed in the horizontal direction, there is a problem that the connection between the tires is easily broken and the seismic energy cannot be sufficiently absorbed.

  Furthermore, when concrete, mortar, etc. are packed inside the waste tire as a filler, the resilience due to the rubber properties of the tire is reduced in the first place, and the waste tires stacked in multiple stages are deformed in the horizontal direction. In addition, there is a problem that the vertical vibration cannot be alleviated and the seismic energy cannot be absorbed sufficiently.

  The present invention has been made by paying attention to the problems of the conventional techniques as described above, and can reuse used tires to contribute to the environment and reduce costs. The purpose of the present invention is to provide a seismic isolation device that can sufficiently absorb rolls during an earthquake and also can sufficiently mitigate vertical vibrations and obtain an excellent seismic isolation effect. .

The gist of the present invention for achieving the above-described object resides in the inventions of the following items.
[1] In a seismic isolation device (10) installed between the foundation (1) on the ground side and the building (2), for preventing resonance by lengthening the natural period of the building (2) during an earthquake,
A plurality of waste tires (20) are stacked one above the other with their central axes aligned in the vertical direction, and a metal flat ring member (30) is placed between the side surfaces where the upper and lower tires (20) overlap. The tires (20) and the ring member (30) are clamped and fastened at predetermined intervals in the circumferential direction between the side surfaces where the upper and lower tires (20) overlap via the ring member (30). Ri consisting of sequentially connected to the up and down,
A wheel (22) attached to the tire (20) is used as a mounting bracket on a side surface facing the outside of the lowermost tire and the uppermost tire (20) among a plurality of tires (20) overlapping vertically. Seismic isolation device (10) characterized in that plate (40) is fixed .

[ 2 ] The seismic isolation device (10) according to [1 ], wherein each tire (20) is filled with an elastic material (21).

Next, the operation based on the present invention will be described.
According to the seismic isolation device (10) described in [1], by using a plurality of tires (20) which are waste products, it is possible to manufacture at a very low cost and to significantly reduce the cost. be able to. Moreover, it is possible to contribute to the environment by effectively using the old tire (20) that has been difficult to dispose of.

  The plurality of tires (20), which are waste products, are stacked one above the other with their central axes aligned in the vertical direction, and a metal flat ring member (30) is interposed between the side surfaces where the upper and lower tires (20) overlap. The tires (20) and the tires (20) are fastened with a plurality of bolts and nuts at predetermined intervals in the circumferential direction between the side surfaces where the upper and lower tires (20) overlap through the ring member (30). The ring member (30) is sequentially connected up and down.

  With such a configuration, in the event of an earthquake, the elastic characteristics of each tire (20) itself absorbs the energy of rolling while deforming in the horizontal direction, and lengthens the natural period of the building (2). ) Can be minimized. In particular, the upper and lower tires (20) are firmly connected to each other by being bolted via the ring member (30), and there is no possibility that the connecting portion is damaged when deformed in the horizontal direction. Moreover, since the ring member (30) between the upper and lower tires (20) is made of metal, it can be plastically deformed when a large load is applied in the vertical direction, and acts as a damper. Combined with the rubber properties, the vertical vibrations can be sufficiently mitigated.

Also, among the plurality of tires overlapping top and bottom (20), attached to the side facing the outside of each tire lowermost and uppermost end (20), a wheel (22) which has been supplied with the said tire (20) Since the base plate (40) is fixed as a bracket for the base, the seismic isolation device (10) is firmly attached to the foundation (1) on the ground side and the base on the building (2) side via the upper and lower base plates (40). Can be supported. Furthermore, the wheel (22) which is a waste product can be used effectively together with the tire (20).

Furthermore, as in the seismic isolation device (10) described in [ 2 ] above, if the inside of each tire (20) is filled with an elastic material (21), a more sufficient elasticity can be obtained. It is possible to alleviate rolling and pitching in time, and complex shaking mixed with these, and an excellent seismic isolation effect can be obtained.

  According to the seismic isolation device according to the present invention, the deformation to the horizontal direction at the time of an earthquake, while sufficiently absorbing the energy of rolling without fear of breakage, and extending the natural period of the building, the influence on the building Can be minimized. Moreover, when a large load is applied in the vertical direction, the ring member between the upper and lower tires can be plastically deformed, acting as a damper, and the vertical vibrations can be sufficiently mitigated in combination with the rubber characteristics of the tires. it can. Furthermore, the effective use of old tires makes it possible to manufacture at a very low cost and contribute to the environment.

Further, on the side facing the outside of each tire lowermost and uppermost end, because to secure the base plate as brackets for mounting the wheel it had been attached to the tire, the upper and lower relative to the base of the ground side and the building-side base The seismic isolation device can be firmly supported through the base plate, and the wheel which is a waste product can be used effectively together with the tire.

  In addition, if each tire is tightly filled with an elastic material, it can obtain more sufficient resilience, mitigating rolling and pitching during an earthquake, and the complex shaking that mixes them. It is possible to obtain a better seismic isolation effect.

Hereinafter, an embodiment representing the present invention will be described with reference to the drawings.
1 to 4 show an embodiment of the present invention.
FIG. 1 is a side view (partially cross-sectional view) illustrating a seismic isolation device 10 according to the present embodiment, FIG. FIG. 4 is a perspective view showing the seismic device 10 in an exploded manner, and FIG. Hereinafter, the example applied to a detached house and a medium- and low-rise building is demonstrated.

  The seismic isolation device 10 is installed between the foundation 1 on the ground side and the building, and is a device for preventing resonance by extending the natural period of the building during an earthquake. As shown in FIG. 4, the seismic isolation device 10 is installed between the foundation 1 and the floor beam 2 as the foundation of the building, but after calculating an appropriate number and position according to the scale and shape of the building. Arranged and configured as an independent unit. As shown in the figure, the foundation 1 is a reinforced concrete formwork panel for foundation formation laid on the ground, and the floor beam 2 is made of a steel frame assembled according to the shape of the bottom of the building, It is not limited to these.

  As shown in FIG. 1 to FIG. 3, the seismic isolation device 10 stacks a plurality of waste tires 20 in the vertical direction with the central axes aligned in the vertical direction, and between the side surfaces where the upper and lower tires 20 overlap. A metal flat ring member 30 is sandwiched between the tires 20 and the ring 20, and the tires 20 and the rings are fastened at predetermined intervals in the circumferential direction between the side surfaces where the upper and lower tires 20 overlap via the ring member 30. The members 30 are sequentially connected up and down. It should be noted that the center axes of the tires 20 do not necessarily need to be completely coincident with each other, and preferably coincide with each other.

  Each tire 20 is, for example, a waste tire for a large truck, and a filler 21 made of an elastic material is packed in a hollow portion of each tire 20 as shown in a cross section in FIG. Specifically, the filler 21 is preferably formed by filling a tube in the tire 20 with rubber, but using a tube filled with air, or using synthetic resin or foam instead of rubber. A material such as resin may be filled. Further, the inside of the hollow portion of the tire 20 may be configured to be directly filled with a material such as rubber, synthetic resin, or foamed resin that is rich in elasticity.

  In the present embodiment, the seismic isolation device 10 is composed of three tires 20, but the number of tires 20 is not limited to three, and two or four or more tires are stacked in a columnar shape. It may be configured. The specific number of tires 20 may be appropriately determined according to the scale of the entire building. In the present embodiment, a plurality of tires 20 having the same diameter are prepared, but the diameters of the tires are not necessarily the same. However, it is sufficient if the contact is in a certain area.

  The ring member 30 is formed of a metal plate so as to be sandwiched between side surfaces where the upper and lower tires 20 are overlapped. The thickness of the ring member 30 is arbitrary, but it receives a large load in the vertical direction during an earthquake. Therefore, it is preferable to set the dimensions so that plastic deformation is possible. The ring member 30 is provided with a plurality of stop holes 31 arranged at equal intervals along the circumferential direction. In the present embodiment, six stop holes 31 are provided, but this number is a design matter that can be arbitrarily determined, and is preferably four or more in order to obtain connection strength.

  In the state where the edges around the wheel holes are vertically stacked on the upper and lower surfaces of the ring members 30 on the upper and lower surfaces of the ring members 30, the edges of the upper and lower tires 20 are connected to the stop holes 31 via the ring members 30. The bolt 32 and the nut 33 to be penetrated are integrally fastened. With such a fastening structure, the tires 20 and the ring member 30 are sequentially connected in the vertical direction to form an integral unit.

  A base plate 40 is fixed to a side surface facing the outside of each of the tires 20 at the lowermost end and the uppermost end among the plurality of tires 20 that are vertically overlapped with the wheel 22 attached to the tire 20 as a mounting bracket. . Specifically, as shown in FIGS. 1 and 3, the wheel 22 is divided into two near the center of the central axis, and the divided wheel 22 is divided into the tires 20 at the lowermost end and the uppermost end, respectively. It is installed.

  The wheel 22 is provided with a plurality of stop holes 23 arranged at equal intervals along the circumferential direction thereof, and the base plate 40 is integrally fastened by bolts 24 and nuts 25 that pass through the stop holes 23. In addition, the number of the stop holes 23 is a design matter which should just be suitably determined, for example in the range of 4-8. As shown in FIG. 1, the lower base plate 40 serves as a mounting bracket that also serves as a reinforcing member that is fastened to the foundation 1 on the ground side with bolts, nuts, and the like. It serves as a mounting bracket that also serves as a reinforcing material that is fastened to the floor beam 2 on the building side with bolts and nuts.

Next, the operation of the seismic isolation device 10 will be described.
The seismic isolation device 10 can be manufactured at a very low cost by using a plurality of tires 20 that are waste products that have been incinerated as industrial waste, and the cost can be greatly reduced. In addition, it is possible to contribute to the environment through the effective use of the old tire 20 that has been difficult to dispose of as industrial waste. In addition, the old tire 20 and the wheel 22 can be obtained very cheaply from a waste product supplier.

  As shown in FIG. 3, the plurality of tires 20 are stacked one above the other with their central axes aligned in the vertical direction, and a metal flat ring member 30 is sandwiched between the side surfaces where the upper and lower tires 20 overlap. . Then, the side surfaces where the upper and lower tires 20 overlap through the ring member 30 are fastened with bolts 32 and nuts 33 at predetermined intervals in the circumferential direction, and the tires 20 and the ring member 30 are sequentially connected in the vertical direction. To do.

  As shown in FIG. 1, when installing the seismic isolation device 10, the base plate 40 attached to the tire 20 at the lowermost end of the seismic isolation device 10 is fixed to the foundation 1 on the ground side with bolts or the like. The floor beam 2 of the building is placed on the base plate 40 attached to the tire 20 at the uppermost end of the seismic device 10 and fixed with bolts or the like. The lowermost tire 20 and the uppermost tire 20 to which the most external pressure is applied are each equipped with a highly rigid wheel 22 to have a high deformation resistance against external force, thereby improving the durability of the seismic isolation device 10 as a whole. be able to.

  In addition, the upper and lower base plates 40 are fixed to the foundations 1 on the ground side and the floor beams 2 on the building side by fixing the wheels 22 mounted on the tires 20 as mounting brackets, respectively. . Further, the wheel 22 that is a waste product can be effectively used together with the tire 20. The seismic isolation device 10 is arranged after calculating an appropriate number and position according to the size and shape of the building (floor beam 2). For example, as shown in FIG. 4, the planar shape of the floor beam 2 of the building On the other hand, in addition to the corners such as the four corners (only one is shown in the figure), they may be arranged in the middle part of each side or other predetermined positions.

  With the seismic isolation device 10 as described above, in the event of an earthquake, the elastic properties of each tire 20 itself absorbs the energy of rolling while deforming in the horizontal direction, and increases the natural period of the building, thereby affecting the building. Can be minimized. In particular, the upper and lower tires 20 are firmly connected to each other by being bolted via the ring member 30, and there is no possibility that the connecting portion is damaged when deformed in the horizontal direction.

  In addition, since the ring member 30 between the upper and lower tires 20 is made of metal, it can be plastically deformed when a large load is applied in the vertical direction, and functions as a damper. Therefore, the vertical vibration can be sufficiently reduced. Furthermore, since each tire 20 is filled with an elastic member 21, more sufficient resilience can be obtained, and rolling and pitching during an earthquake and complex shaking in which these are mixed can be obtained. It becomes possible to relax, and an excellent seismic isolation effect can be obtained. Of course, the building does not move with a little wind or force.

  The embodiments of the present invention have been described above with reference to the drawings. However, the specific configuration is not limited to the above-described embodiments, and the present invention can be changed or added without departing from the scope of the present invention. Included in the invention. For example, if the waste tire is rigid as in the case of a heavy truck, it is not always necessary to fill the inside of each tire with an elastic material.

It is a side (partial cross section) figure which shows the seismic isolation apparatus which concerns on one embodiment of this invention. It is a perspective view which shows the state which installed the seismic isolation apparatus which concerns on one embodiment of this invention. It is a perspective view which decomposes | disassembles and shows the seismic isolation apparatus which concerns on one embodiment of this invention. It is a perspective view which shows the whole floor beam used as the foundation of the building which installs the seismic isolation apparatus which concerns on one embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Foundation 2 ... Floor beam 10 ... Seismic isolation device 20 ... Tire 21 ... Filler 22 ... Wheel 30 ... Ring member 31 ... Stop hole 40 ... Base board

Claims (2)

In the seismic isolation device that is installed between the foundation on the ground side and the building, and prevents resonance by lengthening the natural period of the building at the time of the earthquake,
A plurality of waste tires are stacked one above the other with their central axes aligned in the vertical direction, and a metal flat ring member is sandwiched between the sides where the upper and lower tires overlap, between each tire overlap sides of the upper and lower Te, and a plurality of locations fastened at predetermined intervals in the circumferential direction, Ri formed by sequentially connecting each tire and the ring member vertically,
Of the plurality of tires that overlap vertically, a base plate is fixed to a side surface facing the outside of each of the lowermost tire and the uppermost tire by using a wheel attached to the tire as a mounting bracket. . The seismic isolation device according to claim 1, wherein an elastic material is filled in each tire .

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