JPH0774516B2 - Seismic isolation device fireproof coating structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fireproof coating structure for a seismic isolation device, in which a seismic isolation device made of laminated rubber is provided with fireproof performance.

(Problems to be solved by the invention) Since seismic isolation devices such as laminated rubber have generally been installed between the bottom of the structure and the foundation, fire resistance has not been conventionally required. However, it is indispensable to install a seismic isolation device between the main structures such as the stigmas and pedestals of the general floor of the building, and to apply a fireproof coating to the seismic isolation device in order to make the seismic isolation structure above any floor.

At that time, since the seismic isolation device is scheduled to undergo horizontal deformation at the time of an earthquake, the covering material needs to be attached in a state capable of following the deformation.

The present invention has been made in view of such a background, and an object thereof is to propose a fireproof coating structure that meets the above-mentioned requirements.

(Means for Solving the Problem) According to the present invention, a fire-resistant coating material is formed by forming pits on both ends of two skins made of fire-resistant ceramic fiber and stuffing the same filler made of ceramic fiber inside. However, a state in which a fireproof coating material with a width larger than the height of the seismic isolation device and longer than the circumference is circulated around the upper and lower flanges of the seismic isolation device and is normally bent between the upper and lower structures divided by the seismic isolation device. Installed in, or unitized with a width of about the same as the height of the seismic isolation device, a plurality of fire-resistant coating materials are made adjacent to each other in the circumferential direction of the seismic isolation device, and circulate around this.
By installing the lower part of the seismic isolation device separately from the seismic isolation device, the seismic isolation device is always covered with the seismic isolation device while following the deformation of the seismic isolation device.

In the former case, the fireproof coating 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 described below with reference to the drawings illustrating an example.

First, the invention described in the first claim will be described.

This invention is a seismic isolation device 1 made of laminated rubber as shown in FIG.
The refractory coating material 2 is arranged around the entire circumference of the upper and lower flanges 1a, 1a around the entire height thereof and is covered with the same.

The fireproof coating 2 is a seismic isolation device 1 as shown in FIGS.
It has a width that allows an appropriate amount of slack to be left between the upper and lower sides, and a length that allows the single seismic isolation device 1 to circulate.

As shown in FIG. 4, the fireproof coating material 2 is formed by, for example, packing ceramic fiber fillers 2b inside the fireproof ceramic fiber skins 2a, 2a. The number of windings on the seismic isolation device 1 is adjusted according to the fire resistance required of the seismic isolation device 1.

In the embodiment shown in FIG. 1, the fire-resistant coating material 2 is fixed to the upper structure B ₁ and the lower structure B ₂ which are vertically divided by the seismic isolation device 1 at both lateral positions thereof by the mounting bolts 3 or the like. In this case, the fireproof covering 2 is installed in a bent state between the two structures B ₁ and B ₂ as shown in the figure so as to follow the horizontal deformation of the seismic isolation device 1.

In the case of directly joining to the upper and lower structures B ₁ and B ₂ as in this embodiment, thin-walled wormholes 2c and 2c having only the skin 2a are formed in a strip shape on both sides in the width direction of the fireproof coating material 2. In the section excluding the portions 2c and 2c, the refractory covering 2 has a width that is about the height of the seismic isolation device 1 plus an appropriate amount of slack.

In the embodiment shown in FIGS. 2 and 3, the upper and lower flanges 1a of the seismic isolation device 1 are provided with the fireproof coating 2 through the ring-shaped mounting ring 4 having a diameter closely contacting the outer periphery of the flange 1a as shown in FIG. , 1a
It is joined to.

As shown in FIG. 5I, the mounting ring 4 is divided into a plurality of parts for convenience of mounting around the flange 1a, and the side surface of the mounting ring 4 is used for fixing the fireproof coating 2 with mounting bolts 3 and pins. The bolt hole 4a is opened.

The mounting ring 4 is a seismic isolation device 1 as shown in FIGS. 2 and 3.
The upper and lower flanges 1a, 1a are closely attached, each flange 1a is joined to each flange 1a by a bolt 5 on the side of each structure, and the fireproof coating material 2 is fixed on the other side by a mounting bolt 3 or the like penetrating the same.

As shown in FIG. 5 -II, the fireproof coating 2 is penetrated by the mounting bolts 3 which are passed through the mounting ring 4 in the radial direction, and as shown in III, the upper and lower flanges of the seismic isolation device 1 are inserted through the mounting ring 4. It is joined to 1a and 1a.

2 and 3 show the cases in which the upper and lower structures B ₁ and B ₂ are made of concrete or steel, respectively, but in the case of the former,
The fireproof coating material 2 is fixed to the upper and lower structure bodies B ₁ and B ₂ even in the two pits 2c and 2c, and in the latter case, the upper and lower portion structure bodies B ₁ and B ₂ are coated on the outside of the fireproof coating material 2. A refractory material 6 such as a calcium silicate plate is arranged.

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

As shown in FIG. 6 and FIG. 8, the present invention surrounds the seismic isolation device 1 made of laminated rubber over the entire height thereof and the upper flanges 1a, 1a.
The seismic isolation device 1 is covered by arranging a plurality of fireproof covering materials 2 that are unitized around the main body in between.

As shown in FIGS. 6 to 9, the fireproof covering 2 is a seismic isolation device 1
With a width similar to the height of the main body between the upper and lower flanges 1a, 1a of
The seismic isolation device 1 has a length that allows a plurality of the seismic isolation devices 1 to circulate, and the width and the length are standardized. The material and shape of the fireproof covering material 2 are the same as those of the invention as shown in FIG. 10, and the number of windings is also determined according to the fireproof performance of the seismic isolation device 1.

As shown in FIGS. 7 and 9, the fire-resistant coating materials 2 are adjacent to each other in a plane in the circumferential direction of the seismic isolation device 1 and are continuously arranged, and as shown in FIG. On the upper flange 1a of
Alternatively, as shown in FIG. 8, as in the embodiment shown in FIG. 3 of the present invention, it is fixed via a ring-shaped mounting ring 4 having a diameter that comes into close contact with the outer periphery of the upper flange 1a.

The lower end side of the fireproof coating material 2 is separated from the seismic isolation device 1 so that the seismic isolation device 1 is not subjected to a forced force when it is deformed.

The fireproof coating material 2 is fixed to the seismic isolation device 1 by the mounting bolt 3 at the portion of the groove 2c, as in the above-mentioned invention.

In this invention, since the fireproof coating material 2 is standardized to have a constant width and length, the manufacturing work and the mounting work to the seismic isolation device 1 are standardized, and the covering work of the seismic isolation device 1 is made efficient. at the same time,
Workability at the site will also be improved.

(Effects of the Invention) The present invention is as described above, and the seismic isolation device is circulated, and the refractory covering is attached over its entire height in a state where the refractory covering is bent in the center or in a state where the lower side is separated. Therefore, it is possible to always cover the seismic isolation device while following the deformation of the seismic isolation device, and to increase the degree of freedom in installing the seismic isolation device.

Further, in the invention described in the second aspect, as a result of unitizing the fireproof coating material, it is possible to rationalize the production and construction.

[Brief description of drawings]

1 to 3 are elevation views showing an embodiment of the invention described in claim 1, FIG. 4 is a sectional view showing a fireproof coating material, and FIGS. 5A and 5B are mounting rings. A perspective view, III is a cross-sectional view showing a mounting state of the fireproof coating material, FIG. 6 is an elevation view showing an embodiment of the invention described in claim 2, FIG. 7 is its plan view, and FIG.
FIG. 9 is an elevational view showing another embodiment, FIG. 9 is its plan view,
FIG. 10 is a perspective view showing a fireproof coating material. 1 ... Seismic isolation device, 1a ... Flange, 2 ... Fireproof coating,
2a …… skin, 2b …… filling material, 2e …… spot, 3 …… mounting bolt, 4 …… mounting ring, 4a …… bolt hole, 5 …… bolt, 6 …… refractory, B ₁ …… upper part Structure, B ₂ …… Lower structure.

Claims (2)

[Claims] Claims: 1. Fireproof ceramic fiber skins are provided with pits at both ends, and a ceramic fiber filler is also packed inside to form a fireproof coating material, and steel plates and rubber are alternated. Around the seismic isolation device made of laminated rubber, which is made up of stacked rubber, a fire-resistant coating material with a width larger than its height and longer than the circumference is circulated around the upper and lower flanges of the seismic isolation device, and is divided by the seismic isolation device. Installed in a state where the upper and lower structures are normally flexed, the upper and lower ends of the width direction are joined to the upper and lower structures or the upper and lower flanges to cover the seismic isolation device. Coating structure. 2. A fireproof coating material is formed by forming pits at both ends of two skins made of refractory ceramic fiber, and filling a filler material also made of ceramic fiber inside to form a fireproof coating material, and alternating steel plates and rubber. Around the seismic isolation device made of laminated rubber, which is made up of stacked rubber, a plurality of fire-resistant covering materials unitized with the same width as the height of the seismic isolation device are placed adjacent to each other in the circumferential direction of the seismic isolation device. The upper end of the upper part of the upper and lower structures divided by the seismic isolation device or the upper flange of the seismic isolation device, and the lower end is bent to form the lower structure. A fireproof coating structure for the seismic isolation device that is brought into contact with and covers the seismic isolation device.