JP2001164584A - Seismic isolation equipment for lightweight building or mechanical facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus capable of coping up to 360 deg. with both the rolling and pitching in regard to the seismic isolation for a lightweight structure such as a wooden building and mechanical facility, and also a flexible device capable of coping with the number of stories and shape and also with an existing building being used by the residents. SOLUTION: A seismic isolation rubber pad 3 utilizing the characteristics of rubber and spring member 4 is combined between a foundation and a groundsill of a building or the like, they are united to one body by tightening bolts 9, a foundation attaching plate 6 is fixed to a building foundation with anchor bolts, groundsill attaching frame 1 is fixed to a sill of building 12 thereby prohibiting the direct transfer of the earthquake force from the building foundation to building sill. Even in the same building, forces applied to different portions on different stories vary, but this can be responded only by changing the assembly of the seismic isolation with seismic isolation rubber pad 3 having different strength. Also, both the rolling and pitching can be coped with only by a single device. Also, the installation to existing building can be achieved by fixing or the like after inserting from lateral direction.

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 to be installed in a light-weight building such as a wooden building or a mechanical facility.

[0002]

2. Description of the Related Art Conventionally, as a seismic isolation device for a light-weight wooden building or the like, a material that exerts an effect only on a rolling motion, a material that exerts an effect only in a single direction, or a type thereof. Some are installed by combining different objects. The structure of the device is complicated, the installation method is difficult, and the installation cost is high. Also, when installing a seismic isolation device in an existing building, the entire building must be lifted before installing the seismic isolation device. (For example, Japanese Patent Application Laid-Open No. 9-195578)
No., refer to JP-A-9-317208)

[0003]

In order to spread seismic isolation of a wooden building, which is a general building, a seismic isolation device must be provided at a low price, and the mounting method must be simple and safe. The load and wind pressure of the building change due to the difference between the first floor, the second floor, the third floor, the frontage, the depth ratio, etc.
On the other hand, since the building is lightweight, it is necessary to flexibly support the strength of the seismic isolation device. In addition, seismic isolation of existing buildings is cheap, easy, and
It is necessary to install seismic isolation devices safely.

[0004]

Means for Solving the Problems (a) The present invention provides a method of not transmitting earthquake energy directly from the ground to a building.
A gap is provided between the foundation and the building base without adhering, and a spring and rubber material are combined in that part, and the equipment that makes use of the characteristics of each material absorbs and reduces the seismic energy and then transmits it to the building, thereby exempting the building from exemption. I can quake. (B) The present invention is structurally simple, the seismic isolation strength can be easily changed by a cassette type, and both the roll and the pitch can correspond to 360 degrees. (C) Claim 2 of the present invention is a seismic isolation device to be attached to an existing building foundation and a base, a part of which is movable, the existing foundation at the installation part is cut and inserted from the side, and then the entire upper end of the foundation is attached. Existing buildings can be seismically isolated by cutting them to make a gap with the base.

[0005]

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

FIG. 1 is a perspective view of the present invention. FIG. 2 is a sectional view of the present invention. FIG. 3 is an exploded perspective view of the present invention.
Description will be made with reference to the above three figures.

At the center of the base mounting plate (6), there is a fastening bolt through-hole (6-a), and outside it is a spring fixing frame (5) for securing the position of the spring (4). Further, on the outside thereof, there is provided a round stopper stopper frame (7) in the shape of a round pipe for preventing excessive displacement at the time of the roll of the earthquake. Outside the anchor bolt through holes (6-b) for anchor bolts for fixing the foundation mounting plate (6) to the building concrete foundation (10) outside.
There is.

At the position of the spring fixing frame (5), there is set a spring (4) which functions to absorb the seismic energy of the rolling and pitching and to return the building to its original position even if the building is displaced. A seismic isolation rubber pad (3) having a fastening bolt through hole (3-a) at the center is inserted to support the load of the building and absorb seismic energy by utilizing the characteristics of the rubber during rolling and pitching.

A base mounting frame (1) having a base fixing bolt through-hole (1-b) for being inserted and mounted at the lower end of the building base, and a tightening bolt through-hole (1-a) at the center.
There is a round pipe that can be freely moved 360 degrees within the range of hitting the sideways stopper frame (7) when rolling and fixing it by covering it over the seismic isolation rubber pad (3) and spring (4). (2).

The fastening bolt through holes (1-a), (3-a), and (6-a) at the center of each of the above members are fastened by attaching a washer (9-c) from a lower base mounting plate (6). Bolt (9) is inserted, spring washer (9-b) is mounted on the upper base mounting frame (1), and it is always compressed to spring (4) by tightening with predetermined strength with tightening nut (9-a). It is possible to flexibly cope with horizontal and vertical seismic forces by the tension of the tightening bolt (9) and the repulsive force of the spring (4) and the seismic isolation rubber pad (3). The force does not return to the original state, but always returns to the original state. Also, the portion of the tightening bolt head which is in contact with the washer (9-c) is slanted so that the portion in contact with the washer is reduced. This is to prevent metal fatigue caused by the repetitive action of the tightening bolt (9) when rolling. A plate pad (8) having a hole (8-a) for a bolt head and an anchor bolt through hole ((8-b)) having a bolt head (8-b) for allowing the bolt head (9) to rotate freely in the center. An anchor bolt embedded in the foundation placed on the building foundation concrete (10) is passed through the pad underlay plate (8) and the anchor bolt through holes (8-b) (6-b) in the foundation mounting plate (6). Secure with nuts.

FIG. 4 shows the operation state of the present invention during a rolling earthquake. Because the seismic isolation part is round, it exhibits the seismic isolation function in the same state even if it rolls in any direction from front to back and left and right. The base mounting frame (1) being pulled by the fastening bolt (9) moves sideways without rising. The excessive lateral displacement prevention frame (2) moves only within this range because there is a portion overlapping the lateral displacement stopper frame (7). As the moving width becomes larger, the proof stress becomes larger due to the effect that the pulling force of the tightening bolt (9) and the restoring force of the spring (4) become stronger. Bolt head with a tapered tightening bolt (9-
d) is a structure that is processed diagonally to reduce the portion that comes into contact with the washer (9-c), and is capable of responding to the repetitive motion of rolling without any difficulty by tilting without difficulty.

FIG. 5 shows an operation state of the present invention during a pitching earthquake. When the pushing-up force acts on the present invention, it is received by the seismic isolation rubber pad (3) and the spring (4) before being transmitted to the building body, within the gap between the spring fixing frame (5) and the excessive lateral displacement prevention frame (2). Absorbed by and exerts seismic isolation function. The larger the force applied, the more the seismic isolation rubber pad (3) is compressed and tries to expand laterally, but the outer spring (4) is also compressed at the same time, eliminating gaps between the rings, thus leaving no escape area. Greater proof stress can be secured by making.

FIG. 6 is an installation sectional view of the present invention for an existing building according to claim 2. Since there are many portions that overlap with the description of FIGS. 1, 2, 3, 4, and 5, differences will be described.

A base frame with a hinge type (26) for being inserted from the side and fixed to an existing building concrete foundation (10-k) with a base fixing bolt (24) is inserted into the base plate with a hinge type base frame (26). 22). On the insertion side that rotates in the hinge type, the foundation fixing nut (22
-A) is attached, and it can be fixed simply by making a hole in the existing concrete foundation (10-k) from outside and inserting and tightening the foundation fixing bolt (24).

The base mounting frame (21) with a hinge type is inserted from the side and fixed to the existing building base (12-k). ) Is attached, and it can be fixed simply by making a hole in the existing building base (12-k) from the outside, inserting the base pillar corner reinforcing plate (25), inserting bolts, and tightening.

The gap cut for installing the present invention on the existing building concrete foundation (10-k) is solidified by filling the foundation filling mortar (27). At this time, the bolt protection box (23) is set so that the head of the fastening bolt (9) is not buried.

FIGS. 7, 8, 9 and 10 show a cross section and an elevation before installing the present invention for an existing building according to claim 2 and a cross section and elevation after installation.

In the installation step, the notch (28) of the mounting portion of the existing base seismic isolation device at the lower portion of each pillar on which the present invention is installed is cut and installed as in the above embodiment. Next, in order to secure a gap between the existing building concrete foundation (10-k) and the existing building foundation (12-k), the notch (29) of the existing foundation foundation gap of the entire building is cut.

[0020]

The present invention is embodied in the form described above and has the following effects. (A) By being able to absorb the horizontal and vertical seismic energy transmitted from the ground, damage to buildings, prevention of falling over of household items, reduction of fire danger, and security of residents can be ensured. (B) The structure is simple, a single device can cope with both rolling and pitching, and all the installed devices can also cope with it, and the strength of the built-in members can be easily changed according to the floor number and configuration of the building. Therefore, mass production is easy, and high quality and low price can be achieved. (C) Installation is possible at any position as long as it is between the foundation and the base, the installation method is simple, it can be installed at the optimum position according to the building, and the building can be easily seismically isolated. (D) Since the burden on the main body of the building is reduced by the seismic isolation of the building, it is not necessary to increase the strength of the building more than necessary, and the construction cost can be reduced. (E) The seismic isolation device can be attached to an existing wooden building while it is in a living state, and the building can be seismically isolated in a short period of time and at low cost. (F) Seismic isolation can be achieved not only for wooden buildings but also for light-weight buildings and mechanical equipment.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a sectional view showing an installation state of the present invention.

FIG. 3 is an exploded perspective view of the present invention.

FIG. 4 is a cross-sectional view showing a state when rolling seismic energy is transmitted to the present invention.

FIG. 5 is a cross-sectional view showing a state when pitching seismic energy is transmitted to the present invention.

FIG. 6 is a sectional view showing a state where the present invention is installed in an existing building.

FIG. 7 is a sectional view of an existing foundation before installation of the present invention.

FIG. 8 is a sectional view of an existing foundation after installation of the present invention.

FIG. 9 is an elevation view of an existing foundation before installation of the present invention.

FIG. 10 is an elevation view of an existing foundation after installation of the present invention.

[Explanation of symbols]

 Reference Signs List 1 base mounting frame 1-a tightening bolt through hole 1-b base fixing bolt through hole 1-c base fixing bolt 2 excessive side slip prevention frame 2 seismic isolation rubber pad 3-a tightening bolt through hole 4 spring 5 spring fixing frame 6 foundation mounting Plate 6-a tightening bolt through-hole 6-b anchor bolt through-hole 7 Lateral stopper frame 8 Plate underlay 8-a tightening bolt head hole 8-b anchor bolt through-hole 9 tightening bolt 9-a tightening nut 9-b Spring washer 9-c washer 9-d tapered bolt head 10 building concrete foundation 10-k existing building concrete foundation 11 building pillar 11-k existing building pillar 12 building foundation 12-a building foundation bolt hole 12-k existing building foundation 21 Mounting frame with hinge 21-a Mounting nut 22 Numbered base frame 22-a Foundation fixing nut 23 Bolt protection box 24 Foundation fixing bolt 25 Base pillar corner reinforcing plate 26 Foundation mounting plate with hinged base frame 27 Foundation filling mortar 28 Notch for existing base seismic isolation device mounting part 29 Crevice gap in existing foundation

Claims (2)

[Claims] 1. A base mounting part comprising a base mounting plate (6) having a spring fixing frame (5) and a lateral stopper frame (7) and a pad underlay plate (8);
A seismic isolation part consisting of a spring (4) and a seismic isolation rubber pad (3), a base attachment part consisting of a base attachment frame (1) having an excessive lateral displacement prevention frame (2), and a fastening bolt (9) for fastening and integrating each part. ) And seismic isolation devices installed in light-weight buildings such as wooden buildings and mechanical equipment. 2. A base mounting part comprising a hinge-type base frame-equipped base mounting plate (26) having a spring fixing frame (5), a lateral stopper frame (7) and a hinge-type base frame (22), and a spring. (4) Seismic isolation part consisting of seismic isolation rubber pad (3), base mounting part consisting of excessive lateral displacement prevention frame (2) and hinge mounting base mounting frame (21), and tightening bolts for tightening and integrating each part (9) A seismic isolation device to be installed in a light-weight building such as a wooden building or mechanical equipment compatible with an existing building.