JP-2026076072-A - Seismic damping devices for wooden houses

Abstract

[Problem] To improve the seismic resistance of older wooden houses, we provide a seismic damping structure that can be easily installed from the inside without removing walls or other structures. [Solution] A seismic damping device 1 is installed in the corner of a rectangular space 26 composed of columns, beams, etc., of a wooden house. In order to enable installation from the interior side, metal mounting members 11 and 12 are attached to the interior surface of adjacent structural members of the rectangular space 26, and metal plate spring materials 13 and 14, which have flexible parts 17 made of wave-shaped irregularities 15 and 16 that absorb earthquake tremors, are integrally attached to adjacent structural members. [Selection Diagram] Figure 2

Inventors

• 中島 也寸志
• 網谷 徹己

Assignees

• 株式会社栄精機製作所

Dates

Publication Date

20260511

Application Date

20241023

Claims (2)

1. A seismic damping device for a wooden house, characterized in that, in a rectangular space composed of columns and beams and other lateral members of the wooden house, metal mounting members attached to the interior-facing surfaces of two adjacent members at the corners of the rectangular space are integrally connected by multiple metal plate spring materials having flexible sections with wavy protrusions and indentations.
2. A seismic damping device for a wooden house, characterized in that the height of the flexible portion due to the wavy irregularities of the metal plate spring material is equal to the depth between the interior surface of the column material, etc., in the rectangular space and the surface of the wall provided in the same space.

Description

This invention relates to a seismic damping device that protects wooden houses, particularly older wooden houses lacking sufficient seismic resistance, from earthquake tremors by being attached to the visible surface parts of columns, beams, and foundations without requiring major ancillary construction work such as the removal of wall materials. Traditional seismic reinforcement of wooden houses involved installing wooden bracing within a rectangular space enclosed by horizontal members such as columns and beams. However, in recent years, there has been a growing demand for improved seismic resistance in wooden houses, leading to advancements such as increasing the cross-section of the bracing or creating a truss structure by crossing the bracing. To further improve earthquake resistance, improvements have been made, such as using metal bracing or attaching seismic damping devices, such as metal damper devices with viscoelastic materials sandwiched between them, to the ends of the metal bracing. As a seismic damping device, Patent Publication No. 4195462 (Patent Document 1) discloses a seismic damping method using steel plate springs, in which multiple steel plate springs are curved into arcs with different curvatures, and these springs are arranged in the same direction, overlapping each other to form a crescent-shaped space. In another example, as shown in Figures 1 and 2 of Japanese Patent Publication No. 2002-235457 (patent document 2), a seismic damping device is disclosed that consists of a deformable part that absorbs displacement of the joint due to a shape that is bent in the direction inward or outward of the structural plane of the frame. These conventional seismic isolation or damping devices are installed on the inner surface of the rectangular space formed by structural members such as columns and beams, primarily in wooden houses. Therefore, they are designed to be installed during new construction when the structural members are exposed. Installing them during renovations requires the removal and reconstruction of wall materials, making widespread adoption difficult due to construction time and cost. The lack of readily available, inexpensive earthquake-resistant devices for older wooden houses (40 or 50 years old) contributes to the slow pace of earthquake preparedness in Japan. Patent No. 4195462Japanese Patent Publication No. 2002-235457 This is a schematic diagram illustrating the columns, beams, and foundation of a wooden house, the rectangular space formed by these structural members, and the seismic damping device 1 installed at its corner.This perspective view shows an example of a seismic damping device, consisting of two mounting members with a roughly L-shaped cross-section that are positioned at approximately 90 degrees apart and attached to columns, beams, and foundation materials, and a metal plate spring material with a flexible section provided by wavy protrusions that connects them integrally.This is a perspective view showing an example in which a seismic damping device is integrally formed, with a mounting section and a metal plate spring material having a flexible section.This is an explanatory diagram of the corrugated surface and flexible portion of the metal plate spring material of the seismic damping device.This is an explanatory diagram illustrating another example of the corrugated irregularities and flexible portion of the metal plate spring material in a seismic damping device. The best mode for carrying out the present invention will be described in detail below based on examples. This invention is suitable as a seismic damping device for wooden houses, as it can be installed quickly and inexpensively even in older wooden houses where seismic reinforcement and other earthquake countermeasures have not progressed due to construction time and cost considerations.