JP3013082B2 - Building collapse prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing collapse of a building, such as a wooden house, a lightweight steel-frame warehouse, and the like, comprising a foundation and a building body constructed on the foundation, which prevents the building from collapsing by an earthquake. .

[0002]

2. Description of the Related Art Since Japan is an earthquake-prone country, seismic standards have been established for high-rise buildings with steel bars or steel structures, and seismic devices or seismic isolation devices have been developed and used from the experience of many large earthquakes. ing. However, for buildings such as wooden houses, there are no design standards that take into account seismic resistance, and seismic or seismic isolation devices are in the developing stage. In such a situation, a technique shown in FIG. 5 is known as a device for preventing a building from collapsing due to an earthquake. The collapse prevention device includes a lower metal fitting 51 fixed to a foundation A by an anchor bolt, an upper metal fitting 52 having an elongated mounting plate portion 52A of about 100 cm fixed to a building body B by a lag screw, and an upper metal fitting 52 and a lower fitting. Between the two connecting bolts 53, 53 inserted between the metal fittings 51, the cushioning rubber ring 54 inserted into each of the connecting bolts 53, and the upper metal fitting 52 inserted into the connecting bolts 53; And a cover (not shown) for covering the upper fitting.

[0003]

In the above-mentioned conventional collapse prevention device, the foundation A and the building body B are connected by two connecting bolts 53, 53, and the cushioning rubber ring 54 and the cushioning spring 5 are connected.
5 attempts to absorb vibration, but has the following disadvantages. First, as a means for preventing the building from collapsing, it is a large-sized one having excessive strength and is not suitable for widespread use because of its high number of parts and high price. Two connecting bolts 53, 53 in which a rubber ring 54 and a buffer spring 55 have been inserted in advance, are inserted into the upper fitting 52, and are suspended from the lower fitting 5 for the foundation A.
The mounting position of 1 is determined, a pilot hole is drilled in the foundation A, the lower bracket 51 is fixed to the foundation A with anchor bolts, and the connection bolts 53 are installed by tightening nuts. Combination of parts, alignment of lower metal fitting 51 with connecting bolt 53, upper metal fitting 52 with respect to foundation A
That is, the workability of each work, such as sticking, is poor. In addition, there is a drawback in that a base height of about 300 to 350 mm from the ground is required in order to drill a drill hole for an anchor bolt in the foundation A, so that it cannot be installed in a building having a low foundation A.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and has a sufficient and sufficient strength and is small in size, so that the appearance of the building is not impaired. An object of the present invention is to provide a building collapse prevention device which can reduce the construction cost because the installation work can be easily performed, and has excellent durability.

[0005]

Means of the present invention configured to solve the above-mentioned problems are provided in a receiving fixture fixed to a foundation and a building body constructed on the foundation,
A fall prevention device for a building, comprising a lock fitting engaged with the receiving fitting, wherein the receiving fitting protrudes substantially perpendicularly from both sides of the substrate and is fixed to the base via bolts. A mounting plate, and a configuration in which a housing portion is formed internally by a vibration receiving plate protruding horizontally from the substrate and having both ends connected to the pair of mounting plates, and the locking metal member is formed of a vertically long plate body, A fixing plate fixed to the building body via a screw, and protruding forward from a lower front side of the fixing plate,
An absorber support plate fitted into the storage portion, a vibration absorber provided on the absorber support plate such that an upper end thereof is in contact with a lower surface of the vibration receiving plate, and the vibration absorber stored in the storage portion; A cover plate protruding horizontally from the front surface of the fixed plate so that a small gap exists between the cover plate and the upper surface of the receiver plate.

The one side mounting plate of the pair of mounting plates is formed as a flat plate, and the other side mounting plate is formed as a substantially L-shaped plate whose front end side is bent outward, so that the receiving bracket is formed on the base. Can be installed in corners.

The pair of mounting plates are both formed in a substantially L-shaped plate whose front ends are bent outward, so that the receiving bracket can be installed on a flat surface of the foundation.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the figure, A is a foundation erected on the ground, and B is a building body constructed on the foundation A. Reference numeral 1 denotes a receiving bracket fixed to the foundation A.
It is of the type that sticks to the corners of. Reference numeral 2 denotes a substrate constituting the receiving bracket 1, and the substrate 2 is formed of a substantially rectangular flat plate on the front. 3 and 4 are both ends 2A, 2A in the width direction of the substrate 2.
A pair of mounting plates protruding in a state of being substantially perpendicular to each other, and one of the mounting plates 3 is formed of a flat plate, and a pair of bolt holes 3A, 3A are formed near the front end. On the other hand, the mounting plate 4 on the other side has a distal end side 4A bent outwardly in a substantially L-shape from the middle in the length direction, and a pair of bolt holes 4B, 4B are formed near the distal end. .

Reference numeral 5 denotes a vibration receiving plate made of a flat plate formed to be thinner than the substrate 2. The vibration receiving plate 5 protrudes horizontally from the upper end 2B of the substrate 2 in the same direction as the mounting plates 3 and 4, and both ends 5A and 5A are fixed to upper edges of the pair of mounting plates 3 and 4 by welding means. ing. 6 is the vibration receiving plate 5;
The bottom plate 6 is made of a flat plate having the same thickness as that of the first embodiment. The bottom plate 6 faces the vibration receiving plate 5 and protrudes horizontally from the lower end side of the substrate 2. It is fixed by welding means. Thus, the receiving member 1 is constituted by the substrate 2, the pair of mounting plates 3, 4, the vibration receiving plate 5, and the bottom plate 6, and the inside is formed in the storage part 7 whose one side is open. Since the vibration receiving plate 5 and the bottom plate 6 have the same strength, and the bottom plate 6 can function as a vibration receiving plate, the receiving bracket 1 can be installed upside down, so that the degree of freedom of the installation location increases.

[0010] On the other hand, reference numeral 11 denotes a locking fitting fixed to the building body B and engaged with the receiving fitting 1. 12 is a locking bracket 1
The fixing plate 12 comprises a vertically long plate having a length of about 550 mm, and has a plurality of counterbored screw holes 13, 13 ... spaced apart in the length direction and the width direction. It is set up. Reference numeral 14 denotes an absorber support plate that projects forward from the lower side of the front surface 12A of the fixed plate 12, and the absorber support plate 14 is made of a flat plate that is thick and has strength. And a pair of side plates which stand on both side edges of the support plate body 14A and are fixed to the fixed plate portion 12 by welding means. 14B, 14B, the front plate is formed in a substantially U-shape, and a bolt insertion hole 15 is formed at a position near the center front of the support plate body 14A. Then, the absorber support plate 14
By setting the width W ₁ narrower than the width W ₂ of the vibration receiving plate 5, it is to be able to be easily fitted in the storage section 7 of the receiving metal 1.

Reference numeral 16 denotes a vibration absorber which protrudes from the support plate body 14A. The vibration absorber 16 is inserted from above the compression spring 17 through a washer 18 via a washer 18 through a washer 18 and has a lower end side. It is composed of a hexagon bolt 19 inserted into the bolt insertion hole 15 and a nut 20 screwed to the hexagon bolt 19 from the lower surface side of the support plate body 14A. The compression spring 17 protrudes upward from the absorber support plate 14, and when the locking fitting 11 and the receiving fitting 1 are engaged, the bolt head 19 </ b> A of the hexagon bolt 19 is attached to the vibration receiving plate 5.
The height is set so as to abut on the lower surface 5B.

Reference numeral 21 denotes a cover plate projecting forward from the front surface 12A of the fixed plate portion 12. The cover plate 21 is formed of a horizontally long plate having a substantially L-shaped cross section, and its cover portion 21A has a small gap S between itself and the upper surface 5B of the vibration receiving plate 5, and a gap of 5 mm in the present embodiment. Height is set. The cover plate 21 is positioned horizontally in the horizontal direction so that the horizontal position at the time of installation can be accurately and easily obtained.

This embodiment has the above-mentioned structure. FIG. 3 shows a modified example of the receiving bracket 31 which is fixed to the plane portion of the foundation A. The receiving bracket 31 has the same basic configuration as the above-described receiving bracket 1, except that a pair of mounting plates 33, 33 protruding from the substrate 32 have a distal end 33A bent outwardly from the middle of the length thereof in a substantially L-shape. A pair of bolt holes 33B, 33B are formed near the tip. By forming the pair of mounting plates 33, 33 in this manner, the base A
The receiving fitting 31 can be fixed to the flat part of the above.

The building collapse prevention device according to the present embodiment has the above-described configuration. Next, the installation sequence and operation of the device will be described. First, the installation position of the locking metal member 11 with respect to the building body B is determined, and a horizontal level is applied to the cover plate 21 to determine the horizontal posture, and the lower surface of the absorber support plate 14 is aligned with the lower edge of the building body B to secure the fixing plate. 12 is fixed to the building body B with screws.
Next, the receiving bracket 1 is selected when the installation location is located at the corner of the building, and the receiving bracket 31 is selected when the installation location is located on a plane portion. The metal fitting 1 is fitted, and the receiving metal 1 (31) is fixed to the foundation A with the anchor bolt with the lower surface 5B of the vibration receiving plate 5 in contact with the bolt head 19A.

[0015] Then, since the width W ₂ of the vibration receiving plate 5 than the width W ₁ of the absorber support plate 14 is set wide, the fitting operation of fitting 1 (31) received against the locking fitting 11 is easily performed be able to. Further, since the receiving fitting 1 (31) is installed so that the upper surface thereof (the upper surface 5C of the vibration receiving plate 5) is located at the upper end of the foundation A, a foundation height of about 100 mm is sufficient. A can also be installed.

As described above, the locking fitting 11 and the receiving fitting 1
Since (31) is configured so as not to be connected, the installation work of the building collapse prevention device is extremely simple. The receiving metal 1 (31) and the locking metal 11 only have the upper ends of the bolt heads 19A in contact with the lower surface 5B of the vibration receiving plate 5, and the gap between the upper surface 5C of the vibration receiving plate 5 and the cover plate 21. Is provided with a minute gap S, so that even if the building repeatedly receives vertical micro-vibration due to an earthquake for many years, the vibration absorber 16 absorbs the micro-vibration, thereby preventing bolts and screws from loosening. can do. Moreover, the receiving fitting 1 and the locking fitting 11
Is only in contact with the vibration absorber 16, so that unpleasant sounds such as abnormal noise and chattering sound are not generated by the minute vibration.

[0017] Even if a pulling force acts between the foundation A and the column due to a large vibration, the vibration absorber 16 can attenuate the pulling force by absorbing the vibration. When the rigidity of the vibration receiving plate 5 (31) is received by the rigidity of the vibration receiving plate 5 (31) when the 16 is compressed and becomes a rigid body with a fixed height, the collapse of the building due to the removal of the pillar can be prevented.

In this embodiment, the compression spring 17 composed of a coil spring having a spring constant of 40 kgf / mm ² is used as the vibration absorber. However, the present invention is not limited to this value. May be used.

[0019]

The present invention has the following advantages because it is constructed as described above. (1) The building collapse prevention device is composed of a receiving bracket and a locking bracket, and each bracket has a small number of parts and the movable parts are only vibration absorbers. It has high durability and excellent durability, and the whole structure is compact, so that it does not require an installation place and does not impair the design of the building. (2) For the same reason as above, the manufacturing cost can be greatly reduced as compared with the prior art, the weight is light, and the installation work is easy because the receiving fitting and the locking fitting are not connected. (3) Since the vibration absorber absorbs micro vibrations without connecting the receiving fitting and the locking fitting, the loosening phenomenon of bolts and screws that fix the receiving fitting and the locking fitting to the building is prevented. Can be excellent in durability and safety. (4) The vibration absorber is stored in the storage part of the receiving bracket,
Moreover, because it is configured to drain with a cover plate,
Performance degradation due to rusting of the vibration absorber can be prevented as much as possible. (5) The mounting bracket can be installed on the foundation from the lateral direction with respect to the ground, and installation work from below is unnecessary.
It can be easily installed even on foundations with a low rise from the ground. (6) The cover plate functions as a drain plate to prevent rainwater from entering the storage part and as a horizontal reference plate at the time of installation.
The vibration absorber can be protected from rainwater, and the building collapse prevention device can be installed at an accurate position and easily.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a receiving fitting and a locking fitting constituting a building collapse prevention device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part in a state where a receiving fitting and a locking fitting are engaged.

FIG. 3 is an external perspective view showing a modification of the receiving fitting.

FIG. 4 is an explanatory view of a state in which the building collapse prevention device is installed in a building.

FIG. 5 is a front view of a building collapse prevention device according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 31 Receiving metal fitting 2 Substrate 3, 4, 33 Mounting plate 5 Vibration receiving plate 7 Storage part 11 Locking metal 12 Fixing plate 14 Absorber support plate 16 Vibration absorber 19A Bolt head 21 Cover plate

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E04B 1/36 E02D 27/00 E04H 9/02 301

Claims (3)

(57) [Claims] 1. An apparatus for preventing collapse of a building, comprising: a receiving member fixed to a foundation; and a locking member fixed to a building body constructed on the foundation and engaged with the receiving member. Are a pair of mounting plates protruding in a substantially right angle direction from both sides of the substrate and fixed to the foundation via bolts, and a vibration receiving member protruding horizontally from the substrate and having both ends connected to the pair of mounting plates. The storage part is formed internally by a plate, and the locking fitting is formed of a vertically long plate body, and a fixing plate fixed to the building main body via a screw, and protrudes forward from a lower front side of the fixing plate. An absorber support plate fitted into the storage portion, a vibration absorber provided in the absorber support plate such that an upper end abuts on a lower surface of the vibration receiving plate, and stored in the storage portion; So that there is a small gap between the upper surface of the vibration receiving plate An apparatus for preventing collapse of a building, comprising a cover plate horizontally projecting from a front surface of the fixed plate. 2. The mounting plate according to claim 1, wherein one of the pair of mounting plates is formed as a flat plate, and the other mounting plate is formed as a substantially L-shaped plate having a distal end bent outward. Item 7. The building collapse prevention device according to Item 1. 3. The building collapse prevention device according to claim 1, wherein both of the pair of mounting plates are formed as substantially L-shaped plates whose front ends are bent outward.