Seismic isolation device for housing

Abstract

Although earthquake-resistant structures and base-isolated structures have been studied and implemented as conventional countermeasures against earthquakes, importance has been attached to base isolation in recent central techniques, and reinforced rubber is adopted for huge buildings including large-sized condominiums and high-rise buildings, and the reinforced rubber is used for the underground floors of the buildings based on the characteristics and calculated positions of the reinforced rubber. However, it should be noted that base isolation technology has not yet been adopted in houses, small-scale condominiums, and apartments, and there is no suitable technology, not because of cost. To solve a big problem of collapse of a building and occurrence of death in a modern earthquake.SOLUTION: The present invention is a base isolation device having a simple mechanism to which a wooden or small-scale steel structure is basically applied, is characterized in that it can be easily attached to an existing building as well as a new building, is an epoch-making technology based on an unestablished base isolation theory, and can contribute to society as a technical product intended for general purpose by considering the simplicity of manufacture including application to a large building.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to a seismic isolation device that is basically intended for residential buildings, but it also relates to a device intended to prevent the collapse of houses as one of the two major earthquake countermeasures, which was invented as a simple solution in response to the need to break away from the current situation where earthquake damage is still frequent, along with the need for earthquake-resistant reinforced structures. [Background technology]

[0002] In modern times, seismic isolation technology for large and small buildings has included methods of installing seismic isolation rubber at the base of the building, and although experimental, there has been a ball bearing-type interference method between the foundation surface and the building's floor. There is also a water tank-type seismic isolation theory that uses isolation on the roof of a building, as well as a stress absorption method using collapsible columns. Furthermore, we know of the use of unfixed core columns in five-story pagodas that have been used for seismic isolation for over a thousand years. Summary of the Invention [Problem to be solved by the invention]

[0003] Conventional seismic isolation rubber methods have proven to be very effective for large and heavy buildings such as high-rise buildings, but their application to small buildings is inappropriate due to their light weight and low height. Furthermore, the method of installing bearings at the bottom of the building causes the building to move irregularly, and the development of a stable auxiliary structure to fix the building has been abandoned due to the cost and difficulty of restoration technology. Furthermore, the water tank seismic isolation theory, which is installed on the roof, etc., has been abandoned due to the worsening of amplitude caused by the movement of water and resonance of seismic motion in experiments. Means to solve the problem

[0004] The invention of claim 1 to solve this problem is a seismic isolation system that is based on the technology from the ancient rice found in five-story pagodas and uses a free-moving object as a device, and the basic development concept is to create a device that can be easily attached to many structural members with bolts, etc., targeting small and medium-sized buildings, especially lightweight houses. The rectangular or circular shape makes it possible to install it in both new and existing buildings.

[0005] Furthermore, this seismic isolation technology, combined with the ductility of timber and steel structural materials, can respond to the restoring inertial force of the free-moving object we invented. In other words, the whole body restores itself by gently interfering with the inertia that tries to return to its original state, rather than directly opposing it.

[0006] The inventions of claims 1 to 3 have a wide range of shapes, but the basic technology is a structure in which a heavy solid body is fixed with a tension spring inside a packed exterior body, allowing free horizontal movement, and a second heavy solid body that moves freely horizontally is placed in the center of the structure, making it possible to flexibly interfere with earthquake motion and absorb amplitude motion.

[0007] The seismic isolation device of claim 1 has a rectangular basic structure, which allows it to be installed in many locations, but it is important to place multiple units in a counter-balanced manner in the central area or around the shed, based on the building structure and weight calculations and estimated calculations, but it will be effective even if it is installed in a minimum of four locations.

[0008] The invention of claim 2 is a square-shaped version of the invention of claim 1, and is designed to be installed mainly in the center of a building, allowing for easy installation.

[0009] The invention of claim 3 is based on the square shape of claim 2, and is a shape suitable for residential buildings and small steel-framed buildings. It is a heavy type that is installed on a GL floor, but as a condition for installation, it is integrated with a continuous footing and is the device with the greatest seismic isolation force when installed on a reinforced concrete floor with steel reinforcement.

[0010] This invention demonstrates its performance in seismic isolation, which is primarily intended for small buildings, and is useful for preventing the collapse of buildings when combined with the installation of earthquake-resistant structures. It is also expected to be applied to large buildings. DETAILED DESCRIPTION OF THE INVENTION

[0011] Figure 1 shows claim 1 and is a cross-sectional view of the entire invention. The dimensions are the basic overall length between pillars and beams used in a house, and the height is approximately 400 to 450 mm, and it is essential to fix it to structural materials.

[0012] In this case, the new building should be incorporated into the design and positioned to anticipate appropriate earthquake vibrations, which is essential to obtain the best possible performance.

[0013] Furthermore, when installing in an existing building, partial removal of ceiling and floor panels is required, but the system can be effective even when installed outside the building.

[0014] Figure 2 is a plan view of claim 2, which is installed in the center of the building and is the basic form of claim 3. The special feature is that it is a form that can respond to seismic waves in all directions with one unit.

[0015] The structure based on the form of claim 1 of this invention aims to isolate a heavy object by free movement when it is fixed with a tension spring, but the isolation effect is great due to the complexity of the vibration amplitude of another heavy object installed inside. The interference action of the two heavy objects does not resonate with the earthquake amplitude, and has characteristics that exceed the isolation effect of a five-story pagoda.

[0016] The present invention has claims 2 and 3 which are applications of the structure based on claim 1, and the package is fixed by a plurality of tension springs in a central circular surrounding manner.

[0017] The tension springs installed in claims 1 to 3 of these inventions use coil springs, with extension of around 40% and tie weight stress of around 30kg to 45kg, which can be set arbitrarily. [Industrial Applicability]

[0018] The use of the general-purpose residential seismic isolation device that I invented is a technique to reduce the number of building collapses and fatalities, something that has yet to be solved in earthquake-prone Japan. Although bracing reinforcement is necessary, the basis of a building's true strength is seismic isolation, and I believe it is an essential item for improving collapse prevention.

[0019] After inventing this device and considering its range of use, we decided to focus on housing because there is currently a lot of damage to small buildings, and we envisioned the industrial sector, including small companies that manufacture it as a general-purpose product, with all of the components being standard, existing products available in the market. We invented this device with a sense of social contribution in mourning the damage to buildings and the deaths of those who were crushed in the recent earthquake. We also hope that the product will contribute to the development of the industrial sector as a product that can be sold worldwide.

[0020] The advantage of this invention is that it is an inexpensive and easy-to-install seismic isolation device, and it can be easily installed by not only professional contractors but also by multiple people doing DIY projects.

[0021] In this invention, the free-moving object is basically a solid steel object, but it is a sealed tank type that can also use water as a sealed object after installation, although its performance and effectiveness are somewhat inferior.It is easy to manufacture at ironworks and metal processing companies nationwide, and knock-down products are also possible, so I hope it will become more widely used. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a cross-sectional view of the basic structure of the entire device according to claims 1 to 3. [Figure 2] The circular structural plan view of claim 1 (the shape of claims 2 and 3) and the bearing mechanism are the same as in Figure 1. [Explanation of symbols] 1 Whole box (top is bolted and removable cover for inspection) 2. Main free-moving object (total weight is about 30-45kg, but optional) 3. Secondary free-moving object (weight of approximately 75% of the weight of 2, ±10%) 4. Extension spring (coil spring with extension rate of about 30%) Figure 2 should be installed in at least four places. 5 Bearings (Claim 1 is roller-shaped; Claims 2 and 3 are ball-shaped) 6. Core circular structure box for fixing tension spring

Claims

1. This is a seismic isolation device primarily intended for residential buildings, and is compact enough to be installed not only at the time of new construction but also afterwards in existing buildings. The entire basic structure of the device with seismic isolation function can be installed anywhere in the attic, under the floor, or in structural parts (shed, ridge, beams, joists, floor beams, fire stoppers, etc.).

2. The rectangular seismic isolation device of claim 1 is an omnidirectional type, which is mainly placed in the center of a building and is a seismic isolation device that can be applied to horizontal earthquake motions from all directions with a single unit.

3. The application of claim 2 is a large-scale seismic isolation device that can support a large weight and is installed on a reinforced concrete floor or by embedding it at the GL and FL positions.

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