JPH11193579A - Fire-resistive enclosure structure of base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the fire-resistive enclosure structure of a base isolation device, in which the inspection works of the base isolation device are facilitated. SOLUTION: A lower enclosure body A2 consisting fire-resistive enclosure structure surrounding the base isolation device 1 is formed in a square shape by fire-resistive panels 6a, 6d, the centers of the fire-resistive panels 6a, 6c oppositely faced to one are divided by a shiplap manner, the split panels are formed in a freely rotatable open-close manner through hinge members 14 and simple connecting fittings 15 such as latches are installed to both split panels. Opening sections formed by rotating and opening the fire-resistive panels 6a, 6b are used as the inspection ports of the base isolation device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire-resistant enclosure structure of a base-isolated building, and more specifically, to an improvement of a fire-resistant enclosure structure of a base-isolation device comprising a laminated body constituted by alternately stacking steel plates and rubber. About.

[0002]

2. Description of the Related Art As a seismic isolation device used for a building, a seismic isolation device composed of a laminate formed by alternately stacking steel plates and rubber is widely used. In recent years, in order to respond to a demand for a seismic isolation structure of a high-rise building, the above-described seismic isolation device has been installed between frames of a building such as a pillar.

[0003] When a seismic isolation device is installed between the upper and lower structural frames of a building, unlike the case where the seismic isolation device is installed between the foundation of the building and the building built thereon, It is necessary to cover the seismic isolation device with fireproof to satisfy the predetermined fireproof performance specified in the Building Standards Law. As the fireproof covering structure of the seismic isolation device, Japanese Patent Publication No. 6-35764,
As disclosed in Japanese Patent Application Laid-Open No. 4-29638, Japanese Patent Publication No. 8-28383, etc., there is known a fire-resistant coating structure in which a fire-resistant coating material formed in a ring shape around a seismic isolation device is arranged.

[0004]

However, if a seismic isolation device installed in a building is damaged by a fire, it naturally affects the existence of the supporting frame itself, and thus requires protection by a fire-resistant structure. In addition, rubber-based products lose their functions due to aging and require regular inspections.

However, in the case of the above-described conventional ring-shaped fire-resistant coating structure, it is necessary to remove the fire-resistant coating material every time the seismic isolation device is inspected, and this is necessary for inspection work and repair of the fire-resistant coating material after inspection. When it is troublesome, it is difficult to remove the fire-resistant coating material depending on the installation location, and it is difficult to guarantee whether the fire-resistant coating material after repair has structurally maintained the fire resistance performance specified by the Building Standards Law There is also.

In recent years, seismic isolation floors on which seismic isolation devices are installed are sometimes used for parking lots, warehouses, machine rooms, and the like for the purpose of effectively utilizing buildings. When the seismic isolation floor is used for multiple purposes like this, the fireproof structure of the seismic isolation device
For example, there is a danger of being directly exposed to a fire due to a combustible material brought in, and there is a risk of being damaged when a vehicle or equipment is moved. Therefore, a structure having better fire resistance and mechanical strength is required. Further, when the seismic isolation floor is used for multiple purposes, it is preferable to provide the fireproof covering structure surrounding the seismic isolation device with a design suitable for the seismic isolation floor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional fireproofing structure of the seismic isolation device, and has been made to facilitate the inspection work of the seismic isolation device. Its primary purpose is to provide an enclosure structure.

[0008]

According to the present invention, there is provided a seismic isolation wall structure for a seismic isolation device, which is provided with a required space on the outer periphery of a seismic isolation device comprising a laminated body in which steel plates and rubber are alternately stacked, so that the device can be connected to the outside world. A fire-resistant enclosure that is installed so as to be shielded from the building, wherein the fire-resistant enclosure is divided into an upper enclosure fixed to the upper structural body of the building and a lower enclosure fixed to the lower structural body. A fireproof joint material having cushioning properties is loaded between the surrounding walls, and the upper and lower surrounding walls are each formed of a plurality of fireproof panels capable of surrounding the seismic isolation device, and at least one of the fireproof panels forming the lower or upper surrounding wall. The gist is that one fireproof panel is made openable and closable, and the open part is used as an inspection port for the seismic isolation device.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a preferred embodiment of the present invention, as shown in FIGS. 1 to 4, a fireproof wall structure A surrounding a seismic isolation device 1 is fixed to a superstructure frame 2 of a building. refractory joint material 4 is cushioned between two enclosure bodies as well as divided into upper enclosure body a ₁ of the square and the lower enclosure body a ₂ of the square to be fixed to the lower structure building frame 3 is loaded, the two enclosure bodies a _1, a ₂ each of a plurality of refractory panels 5a to 5d, 6a
Formed by ～6D, among refractory panels 6a~6d of forming the lower enclosure body A _2, the refractory panels facing one 6
a, 6c is divided into an Aijakuri shape at the center, and the end of each divided panel is made rotatable and openable via a hinge member 14, and a simple connecting metal 15 such as a latch or a buckle is provided on both divided panels. The simple connecting bracket was removed, the split panel was pivoted open, and the opened part was used as an inspection port for the seismic isolation device.

[0010]

1 to 4 show an embodiment of the present invention. In FIG. 1 to FIG. 4, reference numeral 1 denotes a seismic isolation device including a laminated body in which steel plates and rubber are alternately stacked, and is installed between an upper structure skeleton 2 and a lower structure skeleton 3 of a building.

Reference numeral A denotes a fire-resistant enclosure structure provided so as to take a required space around the seismic isolation device and shield the device from the outside. The refractory enclosure structure is a square squareness is divided into a lower enclosure body A _2, which is fixed to the upper enclosure body A ₁ and the lower structure skeleton 3 which is fixed to the upper structure skeleton 2. Between the upper and lower surrounding walls A ₁ and A ₂ , a cushioning refractory joint material 4 formed by covering a non-woven fabric with a refractory fiber blanket such as ceramic fiber or rock wool is loaded in a compressed state. The upper and lower structural frames 2 and 3 can have different phase displacements due to the cushioning property of the above.

The upper surrounding wall A ₁ and the lower surrounding wall A
Reference numeral ₂ denotes four refractory panels 5a to 5a each having substantially the same structure.
5d and 6a to 6d form a square shape. Wherein said refractory panel 5a~5d, since 6a~6d are substantially the same structure, the lower enclosure body A ₂ refractory panels 6a~6
The structure of d will be described.

The fireproof panels 6a to 6d are formed by a fireproof plate 7 and metal coating plates 8a and 8b provided on the outer and inner surfaces of the fireproof plate for protecting and reinforcing the fireproof plate 7. I have. In the case where a molded plate formed mainly of refractory fibers such as ceramic fibers or a calcium silicate molded plate is used for the refractory panel, the metal coated plates 8a and 8b are bonded to the molded plate 7 by an adhesive or Fix with screws etc.

The illustrated fireproof panel is a fireproof panel formed by casting a mortar-like fireproof material such as a fireproof castable into a metal box previously assembled in a U-shape. According to this configuration, the step of coating the molded refractory plate 7 with a metal plate can be omitted, and a refractory panel having the outer surface and the inner surface of the refractory plate 7 with the metal coating plates 8a and 8b can be easily obtained.
The metal-coated plate is not limited to a flat plate, and a plate with a ribbed square corrugated plate can be arbitrarily selected and used.

[0015] The in constituting the lower enclosure A ₂ of the square with a refractory panel 6a~6d, first on a lower structural skeleton 3 metal base provided on 9, cross-angled made of a metal as a base material The corner support pillars 10a are erected at the four corners of the rectangular enclosure, and the support pillars 10b are erected at required portions therebetween, and the lower ends thereof are fixed to the pedestal 9 by welding or screws or the like. 6b, 6b are fixed to the corner support columns 10a and 10b. As a fixing means, in the illustrated example, a counterbore through hole is made in the fireproof panel side, and the tip of the stud bolt 11 inserted from the hole is welded with a stud welding machine, and a gap between the stud bolt 11 and the hole is formed from a refractory material. After the cylindrical spacer 12 is inserted, a nut 13 is fixed to the stud bolt 11 and fixed. The fixing means is not limited to this, and for example, means for screwing and fixing a bolt into a screw hole provided on the base material side may be applied.

The refractory panels 6a and 6c facing each other are:
Each of the divided panels is divided into an aerial shape at the center, and the other end of each divided panel is connected to ends of the fireproof panels 6b and 6d fixed to the corner support pillar 10a side via a hinge member 14, and the hinge member is used as a fulcrum. It is configured to be rotatable and openable. The split panels are provided with simple connection fittings 15 such as a latch and a buckle so that the split panels can be easily connected to each other.

The upper surrounding wall A ₁ is the same as the lower surrounding wall A _2.
Is fixed to the upper structure body 2 by substantially the same means as in the case of (1). That is, the metal pedestal 1 provided on the lower surface of the upper structural body 2
6 at four corner support pillars 10a and support pillars 10b
And the refractory panels 5a to 5d are respectively attached to the corner support pillars 10a and 10b by the same fixing means using stud bolts and nuts as described above.
_Make up _one .

According to the above construction, the fire-resistant enclosure structure A is divided into upper and lower enclosures A ₁ and A ₂ , and the cushioning refractory joint material 4 is loaded between them.
Three different phase displacements are possible.

Further, among the refractory panels 6a~6d constituting the lower enclosure body A ₂ of the square, while the opposite refractory panels 6a, since the 6c is set to rotate freely opened double doors equation isolator When inspection is required, the simple connection fitting 15 of the refractory panels 6a and 6c is detached and rotated and opened, so that the opened portion can be used as an entrance for inspection work.

[0020] Figures 5-8 show a second to fifth embodiments of the undercarriage A _2. The same or similar members as those in FIGS. 1 to 4 are denoted by the same reference numerals.

The lower structure A ₂ of the second embodiment shown in FIG.
In this example, the fire-resistant panels 6a and 6c facing each other are pivotally opened and closed in a single-opening manner via hinge members 14, respectively.

The lower structure A ₂ of the third embodiment shown in FIG.
In this example, two refractory panels 6a and 6c opposed to one another can be freely opened and closed in a detachable manner via a simple connection fitting 15.

The lower structure A ₂ of the fourth embodiment shown in FIG.
Does not use the hinge member and the simple connection fitting described above,
Each of the fireproof panels 6a to 6d is turned into four by attaching and detaching the nut 13.
It can be freely opened and closed in a chamfered manner.

The fifth embodiment shown in FIG.
₂ is composed of fireproof panels 6a to 6d in a cylindrical shape, and the fireproof panels 6b and 6d facing one of the fireproof panels 6a to 6d are support pillars 10 serving as a base material.
b is fixed by stud bolts 11 and nuts 13, and the other fire-resistant panels 6a and 6c facing each other are connected to the panels 6b and 6d via hinge members 14, and the fire-resistant panels 6a to 6b and 6c to 6d are each closed with an eye jar. Simple connecting metal fittings 1 such as latch and buckle
5, the fireproof panels 6a and 6c can be pivotally opened and closed in a one-sided manner.

The same effects as those of the first embodiment can be obtained with the fire-resistant enclosures of the second to fifth embodiments. The fireproof panel shown in the fireproof wall structure of each of the above embodiments has a configuration in which the metal coating plates 8a and 8b are provided on both the outer surface and the inner surface of the fireproof plate 7. However, the fireproof panel is configured only with the fireproof plate 7. May be done. A fireproof panel provided with a metal cover plate on the outer surface of the fireproof plate 7 is useful for protection and reinforcement of the fireproof plate 7 particularly when used in a fireproof enclosure structure of a seismic isolation device of a seismic isolation floor used for multiple purposes. In that case, the metal-coated plate may be provided only on the outer surface of the refractory plate 7.

[0026]

As described in detail above, the fireproof wall structure of the seismic isolation device according to the present invention is divided into upper and lower parts, and a cushioning joint material made of a fireproof material is loaded between them. Therefore, it is possible to allow different phases of displacement between the lower structure frame on which the seismic isolation device is installed and the upper structure frame supported by the seismic isolation device.

In addition, according to the present invention, since the upper enclosure and the lower enclosure divided into upper and lower parts are constituted by a plurality of fireproof panels surrounding the seismic isolation device, the lower or upper enclosure is constituted. By making at least one fireproof panel of the fireproof panels openable and closable, the opened part can be used as an inspection work port of the seismic isolation device.

Further, according to the present invention, the refractory panel has a structure in which a metal coating plate is provided on an outer surface of a refractory plate having a required thickness, thereby protecting the refractory plate and improving strength. A fire-resistant enclosure structure is easily obtained.

Further, according to the present invention, since the fireproof wall structure is composed of a plurality of fireproof panels, it can be easily formed into any of a square type and a cylindrical type as required.
For example, when a seismic isolation device is installed on a prism of a building, the fireproof wall structure may be configured in a square shape so as to match the prism, and a design that does not give a sense of strangeness to the design of the seismic isolation device can be achieved.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a front view of a fireproof wall structure installed on a seismic isolation device.

FIG. 2 is a front view showing only the fireproof wall structure.

FIG. 3 is a cross-sectional view of a lower enclosure forming a fire-resistant enclosure.

FIG. 4 is an enlarged sectional view of a part of a lower surrounding wall.

FIG. 5 is a cross-sectional view of a lower enclosure according to a second embodiment.

FIG. 6 is a cross-sectional view of a lower enclosure according to a third embodiment.

FIG. 7 is a cross-sectional view of a lower enclosure according to a fourth embodiment.

FIG. 8 is a cross-sectional view of a lower enclosure according to a fifth embodiment.

[Explanation of symbols]

A refractory enclosure structure A ₁ upper enclosure body A ₂ lower enclosure body 1 seismic isolation device 2 superstructure building frame 3 substructure skeleton 4 cushion member 5a~5d upper enclosure body refractory panel 7 refractory plate of refractory panels 6a~6d bottom surrounding wall of 8a, 8b Metal-coated plate 9 Metal pedestal 10a Corner support column 10b Support column 11 Stud bolt 12 Spacer 13 Nut 14 Hinge member 15 Simple connection bracket 16 Metal pedestal

Claims (4)

[Claims] 1. A fire-resistant enclosure comprising a seismic isolation device composed of a laminate in which steel sheets and rubber are alternately stacked, taking a required space around an outer periphery of the device to block the device from the outside world. The enclosing wall structure is divided into an upper enclosing wall fixed to the upper structural frame of the building and a lower enclosing wall fixed to the lower structural frame, and a cushioning refractory joint material is loaded between the two enclosing walls. Each of the surrounding walls is formed of a plurality of fireproof panels capable of surrounding the seismic isolation device, and among the fireproof panels forming the lower or upper surrounding wall, at least one of the fireproof panels is made openable and closable, and the open portion thereof is isolated. A fire-resistant enclosure structure for seismic isolation devices, which is used as an inspection port for seismic devices. 2. The fire-resistant enclosure structure of a seismic isolation device according to claim 1, wherein the upper and lower enclosures are formed in a square or cylindrical shape by a plurality of fire-resistant panels. 3. At least one of the plurality of fireproof panels constituting the lower surrounding wall is rotatably openable and closable via a hinge member, is detachable using a simple connection fitting, or is provided with a bolt or bolt. 3. The fireproof wall structure of the seismic isolation device according to claim 1, wherein the nut is detachable by attaching and detaching the nut. 4. The fireproof panel according to claim 1, wherein said fireproof panel is formed of ceramic fiber as a main material, a fireproof panel of calcium silicate molded body, a fireproof plate formed of ceramic fiber as a main material, or a fireproof plate of calcium silicate formed plate. 4. A fireproof wall structure for a seismic isolation device according to claim 1, wherein a fireproof panel having a metal cover plate on the surface thereof or a fireproof panel formed by casting a fireproof castable material in a metal box is used. .