Seismic isolation wall structure

Abstract

To provide a structure of a lightweight wall capable of avoiding damage to plastering on a wall surface and drawing on the surface without directly applying external force such as distortion.SOLUTION: A double wall is formed by providing a lightweight wall on the indoor side of a building of an existing wall surface, and the lightweight wall is connected to the existing wall surface only by a vibration control device. The anti-vibration device includes only a cylindrical anti-vibration rubber, a disk-shaped metal plate provided with the anti-vibration rubber interposed therebetween, and a support column erected from a central portion of the metal plate. Angle members are fixed to the metal plates on both sides of the vibration isolator, one of the angle members is attached to the existing wall surface, and the other angle member is attached to the lightweight wall. A metal plate for supporting an angle material arranged on the existing wall surface side from below, is arranged in the lowermost part of the lightweight wall. In the intermediate part of the lightweight wall, the angle materials on both sides are directly fixed to the existing wall surface and the lightweight wall, respectively. At the top of the lightweight wall, the angle provided on the side of the lightweight wall is fixed directly to the frame protecting the top of the lightweight wall.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] This invention relates to a seismic isolation wall structure that prevents deformation and strain caused in the skeleton by an external force such as an earthquake from being transmitted to the wall surface. [Background technology]

[0002] Conventional lightweight walls are generally finished with plastering or other coatings on the surface of boards, etc. In this case, lightweight walls are usually connected to the structural frame via an underlying lightweight steel frame, so they can be damaged by interlayer deformation caused by external forces such as earthquakes. In the case of conventional plastering, such as plaster, the finish does not adapt to deformations such as strain, so damage occurs to the finish material. Furthermore, depending on the type of finish material, it may not be possible to easily repair or touch up the damaged area. In particular, damage to finishes that feature delicate designs such as fresco paintings can cause significant damage.

[0003] In other words, as shown in Figure 7, a conventional lightweight wall 20 is restrained between upper and lower beams 21, 22 and columns 23, 24 on both sides, so when a sudden horizontal force such as an S-wave from an earthquake is applied, it cannot respond to this force, and the lightweight wall itself is partially destroyed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-173266 Summary of the Invention [Problem to be solved by the invention]

[0005] Patent Document 1 describes a wall structure with a seismic isolation structure. However, the wall in this invention uses steel coil springs as seismic isolation materials, and the wall is supported and fixed by these seismic isolation materials. However, a configuration in which coil springs absorb vibrations can cause resonance depending on the natural frequency of the springs and the frequency of the input external force, which causes the wall to move significantly.

[0006] The present invention aims to improve upon the conventional lightweight wall structure that is restrained by columns and beams, and to disclose a lightweight wall structure that is not directly subjected to external forces such as strain and can avoid damage to the plastering of the wall surface or the drawings on its surface. [Means for solving the problem]

[0007] To achieve the above-mentioned objectives, the present invention is premised on a double-wall structure in which a lightweight wall is installed on the interior side of an existing wall. The lightweight wall is connected to the existing wall only by vibration isolation devices. In this structure, the lightweight wall is supported only by the vibration isolation devices and not by any other means. Therefore, even in the event of an earthquake or other disaster, vibrations are first transmitted to the existing wall, which is the structural frame. However, because the lightweight wall is supported only by the vibration isolation devices, the vibrations of the existing wall are absorbed or attenuated by the vibration isolation devices and then transmitted to the lightweight wall. Furthermore, the present invention selectively employs a method in which multiple vibration isolation devices are installed and arranged in a matrix for each of the existing wall and the lightweight wall. The matrix arrangement allows vibrations from the existing wall to be transmitted evenly to the vibration isolation devices, thereby avoiding distortion of the lightweight wall due to uneven vibration.

[0008] The specific configuration of the vibration isolation device is comprised of vibration-isolating rubber, metal plates sandwiching the vibration-isolating rubber, and a support pillar erected from the center of the metal plate. The metal plates are used to efficiently transmit vibrations to the vibration-isolating rubber, and the support pillar is used to install the vibration isolation device relative to other components. To install the vibration isolation device relative to the wall, angle irons are fixed to the metal plates on both sides of the vibration isolation device, with one of these angle irons attached to the existing wall and the other to the lightweight wall. [Effects of the Invention]

[0009] Since the present invention employs the above-described configuration, even when vibrations such as those from an earthquake are input to the building's framework, the lightweight walls are connected only by the vibration isolation device, and the vibration absorption capacity of this device means that the vibrations are not transmitted to the lightweight walls, or are transmitted only at a reduced intensity, making it possible to prevent the plasterwork and surface paintings on the lightweight walls from cracking or being destroyed. [Brief explanation of the drawings]

[0010] [Figure 1] Front view of a seismic isolation wall structure according to one embodiment of the present invention [Figure 2] Front view of the lightweight wall part [Figure 3] FIG. 1 is a perspective view showing an anti-vibration device of the present invention; [Figure 4] A side view showing the lower part of the seismic isolation wall structure. [Figure 5] A side view showing the upper part of the same. [Figure 6] FIG. 10 is a side view showing the fit of the middle part. [Figure 7] Front view of a conventional example DETAILED DESCRIPTION OF THE INVENTION

[0011] A preferred embodiment of the present invention will now be described with reference to the drawings. FIG. 1 shows a front view of a seismic isolation wall structure according to one embodiment, and FIG. 2 shows the lightweight wall portion of the structure. In the figure, 1 denotes an existing wall surface of a building, and 2 denotes a lightweight wall installed on the interior side of existing wall surface 1, made of, for example, ALC board. Note that lightweight wall 2 is not rigidly attached to existing wall surface 1, but is installed so as to prevent external forces applied to existing wall surface 1 from being directly transmitted. This configuration is achieved by attaching lightweight wall 2 to existing wall surface 1 via vibration isolation device 3 to form a double wall. As shown in FIG. 3, for example, vibration isolation device 3 is configured by sandwiching cylindrical vibration isolation rubber 4 between metal plates 5·5, with support posts 6·6 erected in the center of these metal plates 5·5. It is preferable to use threaded bolts as support posts 6 to facilitate assembly of vibration isolation device 3 to the wall. The vibration isolation rubber 4 itself does not need to have a configuration specific to the present invention; known vibration isolation rubber materials can be used. Then, the lightweight wall 3 is constructed with the vibration isolation device 3 interposed between the existing wall surface 1 and the lightweight wall 2.

[0012] To install a lightweight wall 2 on an existing wall surface 1, first, battens 7 are installed at a predetermined interval on the existing wall surface 1. Next, the support columns 6 on one side of the vibration isolation device 3 are fixed to the battens 7 at a predetermined interval. Then, the support columns 6 on the other side of the vibration isolation device 3 are fixed to the lightweight wall 2. In this case, as shown in the drawings, the vibration isolation devices 3 are preferably installed at the intersections of a grid, or in a so-called matrix configuration, to avoid uneven placement relative to the lightweight wall 2. Note that although the battens 7 are installed vertically in this embodiment, they can also be installed horizontally. What is necessary is to install the vibration isolation devices 3 evenly on the lightweight wall 2. This allows the vibration-isolating rubber 4 to evenly absorb external forces applied to the existing wall surface 1, preventing uneven movement of the lightweight wall 2 and stress concentration in one area, which could lead to undesirable cracks or damage in that area. Here, the number of vibration isolation devices 3 to be installed is not particularly limited, but the required number is determined based on the area and weight of the lightweight wall 2. In Figure 1, lightweight wall 2 has a relatively large area, so it is arranged in a 7x4 matrix, but if the wall surface is wider, more vibration isolators will be required, and if the wall surface is narrower, the number shown in the figure will not be necessary. In short, the total weight of the lightweight wall needs to be supported only by the connections of the vibration isolators, so if there are too few vibration isolators in relation to the area of ​​the lightweight wall, the lightweight wall will sag. Conversely, if there are too many vibration isolators, the flexible connections required of the vibration isolators will be hindered and extra costs will be incurred. Therefore, the required number is calculated taking into account the vibration absorption capacity of the vibration isolating rubber, etc.

[0013] For example, the vibration isolation device 3 is installed at the bottom of the lightweight wall 2 as shown in Figure 4. Here, the vibration isolation device 3 is fixed between an angle bar 8 on the existing wall 1 side and an angle bar 9 on the lightweight wall 2 side. Each is fixed by tightening nuts onto bolts attached to the support posts 6 of the vibration isolation device 3. Reference numeral 10 denotes a frame provided to protect the periphery of the lightweight wall 2, 11 a metal plate supporting the angle bar 9 from below, and 12 a plaster wall that forms the surface of the lightweight wall 2. An example of a plaster wall is a fresco-like design on the surface. Reference numeral 13 denotes a portion of the existing wall 1, made of fireproof board. The angle bar 8 on the existing wall 1 side is attached to a wall or column. In Figure 4, the angle bar 8 on the existing wall 1 side is shown attached to a partition. The wall on the existing wall 1 side can be a main wall or a partition wall, and the column does not have to be a partition stud.

[0014] The configuration shown in Figure 5 is the fit of the top of the lightweight wall 2. For the fit of the top, the vibration isolation device 3 used and the angle members 8 and 9 that sandwich it are the same as those shown in Figure 4, but unlike the fit of the bottom, there is no need to take into account the displacement of the lightweight wall 2 in the direction of gravity, so the metal plate 11 is not provided. The angle member 8 on the lightweight wall 2 side is fixed directly to the frame 10. Figure 6 is a cross-sectional view showing the fit of the middle part of the lightweight wall 2, with the angle members 8 and 9 on both sides fixed directly to the existing wall surface 1 and the lightweight wall surface 2, respectively.

[0015] By adopting the above-described configuration, even if an unexpected external force is applied to the building, the existing wall surface 1 and the lightweight wall 2 are separated in terms of stress by the vibration isolation device 3, so vibrations and deflections of the existing wall surface 1 are absorbed by the vibration isolation device 3 and are not directly transmitted to the lightweight wall 3. Therefore, distortion of the lightweight wall 3 is minimized even in the event of sudden vibrations such as an earthquake, preventing cracks in the plaster wall, which is relatively vulnerable to stress. Furthermore, designs applied to the surface of the lightweight wall 2 are also protected, so expensive artworks such as murals can be effectively protected. [Explanation of symbols]

[0016] 1 Existing wall 2. Lightweight walls 3. Vibration isolation device 4 Anti-vibration rubber 5 metal plate 6 pillars 7. Pillars 8, 9 Angle iron 10 Frame

Claims

1. A lightweight wall is installed on the indoor side of the existing wall to create a double wall, and the lightweight wall is connected to the existing wall only by a vibration isolation device. The vibration-isolating device is comprised of only a cylindrical vibration-isolating rubber, a disk-shaped metal plate sandwiching the vibration-isolating rubber, and a support pillar erected from the center of the metal plate, Angle irons are fixed to the metal plates on both sides of the vibration isolation device, one of the angle irons being attached to the existing wall surface and the other angle iron being attached to the lightweight wall, At the bottom of the lightweight wall, a metal plate is provided to support the angle iron provided on the existing wall surface from below, In the intermediate portion of the lightweight wall, the angle members on both sides are directly fixed to the existing wall surface and the lightweight wall, respectively; A seismic isolation wall structure in which, at the top of the lightweight wall, the angle iron provided on the lightweight wall side is directly fixed to a frame body that protects the top of the lightweight wall.

2. A lightweight wall is installed on the indoor side of the existing wall to create a double wall, and the lightweight wall is connected to the existing wall only by a vibration isolation device. The vibration-isolating device is comprised of only a cylindrical vibration-isolating rubber, a disk-shaped metal plate sandwiching the vibration-isolating rubber, and a support pillar erected from the center of the metal plate, Angle irons are fixed to the metal plates on both sides of the vibration isolation device, one of the angle irons being attached to the existing wall surface and the other angle iron being attached to the lightweight wall, A seismic isolation wall structure, wherein the angle iron attached to the existing wall surface side is larger than the angle iron attached to the lightweight wall side.

3. 3. The seismic isolation wall structure according to claim 1, wherein a plurality of vibration isolation devices are provided and arranged in a matrix with respect to each of the existing wall surface and the lightweight wall.

Images