JPH0387443A - Earthquake-free device of fireproof covering structure - Google Patents

Abstract

PURPOSE:To improve the fireproof property by positioning plural sheets of fireproof covering members which are made into a unit surrounding the upper and the lower flanges around an earthquake-free device made of a laminate rubber. CONSTITUTION:A fireproof covering member 2 is formed of a fireproof ceramics outer layer 2a and a ceramics fiber filler 2b inside the outer layer 2a. And the fireproof covering members 2 are fixed with fixing bolts 3 directly to the upper structure B1 and the lower structure B2 which are divided by an earthquake-free device 1. Then, fixing rings 4 are contacted closely to the upper and the lower flanges 1a of the earthquake-free device 1, and connected with the bolts 5 of the structures B1 and B2. As a result, the construction efficiency of the covering work of the earthquake-free device 1 can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fire-resistant covering structure for a seismic isolation device, which provides fire-resistant performance to a seismic isolation device made of laminated rubber.

(Problem to be solved by the invention) Seismic isolation devices such as laminated rubber have not traditionally been required to have fire resistance because they have generally been installed between the bottom of a structure and the foundation. However, in order to install a seismic isolation device between major structures such as column heads and column bases on general floors of a building, and to create a seismic isolation structure for any floor above, it is essential to apply a fireproof coating to the seismic isolation device.

At this time, since the seismic isolation device is expected to undergo horizontal deformation during an earthquake, the covering material needs to be installed in a manner that allows it to follow that deformation.

This invention was made based on this background, and attempts to propose a fireproof coating structure that meets the above requirements.

(Means for Solving the Problems) In the present invention, a fireproof covering material having a width larger than the height of the seismic isolation device and longer than the circumference is wound around the upper and lower flanges of the seismic isolation device, and the upper and lower portions are separated by the seismic isolation device. By installing it in a normally flexed state between structures, or by unitizing it with a width similar to the height of the seismic isolation device, multiple pieces of fireproof covering material can be installed adjacent to each other in the circumferential direction of the seismic isolation device. By rotating around the lever and installing it with the lower part separated from the seismic isolation device, it is always covered while following the deformation of the seismic isolation device, thereby imparting fire resistance to the seismic isolation device.

In the former case, the fireproof cladding is attached to the upper and lower structures or the upper and lower flanges of the seismic isolation device, and in the latter case, the upper part is attached to the upper structure or the upper flange of the seismic isolation device.

(Example) The present invention will be explained below based on the drawings showing one embodiment.

First, the invention described in claim 1 will be explained.

This invention is based on a seismic isolation device 1 made of laminated rubber as shown in FIG.
A fireproof covering material 2 is placed around the entire height of the fireproof flange 2 and around the upper and lower flanges 1a and 1a, and is coated with this material.

The fireproof covering material 2 is attached to the seismic isolation device 1 as shown in FIGS. 1 and 2.
It has a width that allows a suitable amount of slack to be left between the top and bottom of the plate, and a length that allows one piece to go around the seismic isolation device 1.

As shown in FIG. 4, this fire-resistant covering material 2 is composed of a skin 2a+28 made of fire-resistant ceramic fibers and filled with a filler material 2b also made of ceramic fibers, and its thickness and base isolation W1 are The number of winding layers is adjusted according to the fire resistance performance required of the seismic isolation device 1.

In the embodiment shown in FIG. 1, a fireproof covering 2 is divided into an upper structure B1 and a lower structure B by a seismic isolation device 1 at both sides in the width direction. In this case, the fireproof covering material 2 is installed in a bent state between the two structures B, 82 as shown in the figure, so that it can follow the horizontal deformation of the seismic isolation device 1. be done.

As in this embodiment, the upper and lower structures B,,B.

In the case of direct bonding to the fire-resistant sheathing material 2, thin-walled grooves 2c, 2c with only the skin 2a are formed in a band shape on both sides of the fire-resistant sheathing material 2 in the width direction, and the fire-resistant sheathing material 2 is formed in the section excluding the grooves 2c, 2c on both sides. A width equal to the height of the seismic isolation device 1 plus an appropriate amount of slack is secured.

In the embodiment shown in FIGS. 2 and 3, the fireproof covering 2 is attached to the upper and lower flanges Ia of the seismic isolation device 1 via a ring-shaped attachment ring 4 having a diameter that closely contacts the outer periphery of the flange 1a, as shown in FIG.
, la.

As shown in Fig. 5-■, the mounting ring 4 is divided into a plurality of parts for convenience of mounting around the flange 18, and on the side thereof there are holes for fixing the fireproof coating 2 with mounting bolts 3, bottles, etc. A bolt hole 4a is drilled.

The mounting ring 4 is attached to the seismic isolation device 1 as shown in Figures 2 and 3.
Attachment bolts 3 are closely attached to the upper and lower flanges Ia, la, are joined to each flange 1a by bolts 5 on the respective structure sides, and through which the fireproof covering 2 passes through on the other side.
Fixed by etc.

As shown in Fig. 5-■, the fireproof sheathing material 2 is penetrated by the mounting bolts 3 which are passed through the mounting ring 4 in the radial direction, and is attached to the upper and lower flanges of the seismic isolation device 1 through the mounting ring 4 as shown in la, joined to la.

FIGS. 2 and 3 show the upper and lower structures B, respectively.

If B2 is a concrete structure or a steel frame structure,
In the former case, the fireproof sheathing 2 is fixed to the upper and lower structures B + and Bz also at the grooves 2c and 2c on both sides, and in the latter case, the upper and lower structures B are attached to the outside of the fireproof sheathing 2.
A refractory material 6 such as a calcium silicate plate covering + and B z is arranged.

Next, the invention described in the second claim will be explained.

As shown in FIGS. 6 and 8, this invention includes upper and lower flanges Ia,
A plurality of unitized fireproof covering materials 2 are placed around the main body between la to cover the seismic isolation device 1.

The fireproof covering material 2 is attached to the seismic isolation device 1 as shown in FIGS. 6 to 9.
The width is about the same as the height of the main body between the upper and lower flanges Ia and la, and the length is such that multiple pieces can be assembled to go around the seismic isolation device l, and the width and length are standardized and manufactured. . As shown in FIG. 10, the material and shape of this fireproof covering material 2 are the same as those of the invention described above, and the number of sheets wrapped around it is determined according to the fireproof performance of the seismic isolation device 1.

As shown in FIGS. 7 and 9, the fireproof covering material 2 is adjacent to and continuous with the seismic isolation device 1 in the circumferential direction in plan view, and as shown in FIG. or, as shown in FIG. 8, is fixed via a ring-shaped attachment ring 4 having a diameter that closely fits the outer periphery of the upper flange la, as in the embodiment shown in FIG. 3 of the invention. Ru.

The lower end side of the fireproof covering material 2 is separated from the seismic isolation device 1, so that the structure is such that it is not subjected to forced force when the seismic isolation bag W1 is deformed.

The fireproof covering material 2 is fixed to the seismic isolation device 1 by the mounting bolts 3 at the grooves 2c, as in the above invention.

In this invention, since the fireproof covering material 2 is standardized to a certain width and length, the production and installation work to the seismic isolation device 1 are standardized, and the work of covering the seismic isolation device 1 is made more efficient. at the same time,
Workability on site will also be improved.

(Effects of the Invention) This invention is as described above, and is a device in which a fireproof coating is installed around a seismic isolation device and over its entire height, with the fireproof coating bent at the center or separated at the bottom. Therefore, it is possible to always cover the seismic isolation device while following the deformation of the seismic isolation device, and the degree of freedom in installing the seismic isolation device can be increased.

Further, in the invention as set forth in claim 2, as a result of unitizing the fireproof covering material, it is possible to rationalize its production and construction.

[Brief explanation of drawings]

Figures 1 to 3 are elevational views showing the embodiment of the invention as claimed in the first claim, Figure 4 is a sectional view showing the fireproof coating, and Figures 5-1 and II show the mounting ring. A perspective view, ■ is a cross-sectional view showing the installed state of the fireproof coating, FIG. 6 is an elevational view showing an embodiment of the invention as claimed in claim 2, FIG. 7 is a plan view thereof, and FIG. 9 is a plan view thereof, and FIG. 10 is a perspective view showing a fireproof coating. 1... Seismic isolation device, la... Flange,
2...Fireproof covering material, 2a...Skin, 2
b... Filler, 2c... Ear, 3...
...Mounting bolt, 4...Mounting ring, 4a
...Bolt hole, 5...Bolt, 6...
...Fireproof material, B, ...Superstructure, B2.
...lower structure. Diagram

Claims (2)

[Claims] (1) Around the seismic isolation device made of laminated rubber made by stacking steel plates and rubber alternately, a fireproof covering material with a width greater than the height and longer than the circumference is placed around the top and bottom flanges of the seismic isolation device. , installed in a normally flexed state between the upper and lower structures separated by the seismic isolation device, and the upper and lower ends in the width direction are joined to the upper and lower structures or the upper and lower flanges to cover the seismic isolation device. The fireproof covering structure of the seismic isolation device. (2) Around the seismic isolation device made of laminated rubber, which is made up of alternating stacks of steel plates and rubber, multiple pieces of fireproof covering material are installed around the seismic isolation device, which are made into units with a width similar to the height of the seismic isolation device. The upper structure of the upper and lower structures, which are adjacent to each other in the direction and orbit around this, and whose upper ends are separated by a seismic isolation device;
Or a fireproof covering structure for a seismic isolation device, which is bonded to the upper flange of the seismic isolation device and covers the seismic isolation device.