JP2000320043A - Exterior-wall fire preventive construction of vibration- isolation building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit relative displacement between an upper-layer building frame and a lower-layer building frame, to prevent the infiltration of rainwater and air from the outside of a building to the inside and to attain high fire resistive performance between the outside and the inside. SOLUTION: The first mounting bodies 13a, 13b are fixed between exterior wall sections 7, 8 of an upper-layer building frame 2 and a lower-layer building frame 3 parted up and down respectively while the second mounting bodies 15a, 15b are fixed onto side sections 14a, 14d on the outside 5 sides of first mounting bodies 13a, 13b, respectively. A fire-resistive member 16 is interposed slidably between the first mounting bodies 13a, 13b while a watertight sealing material 1 is installed on the outside 5 sides between the second mounting bodies 15a, 15b, and an airtight sealing material 22 is mounted on the inside 6 sides.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation building which allows a relative displacement between an upper frame and a lower frame due to vibration during an earthquake to search for a gap between an outer wall of the upper frame and an outer wall of the lower frame. Outer wall fire prevention structure.

[0002]

2. Description of the Related Art A typical prior art is disclosed in Japanese Unexamined Patent Publication No.
No. 99128. In this conventional technique, a seismic isolation device is interposed between an upper frame and a lower frame that are structurally separated, and the upper frame and the lower frame are supported so as to be relatively displaceable in a substantially horizontal direction, A heat-resistant structure is provided between the lower end of the upper outer wall of the upper skeleton and the upper end of the lower outer wall of the lower skeleton, allowing the relative displacement of the upper skeleton and the lower skeleton in the substantially horizontal direction, and The space between the upper outer wall of the upper frame and the lower outer wall of the lower frame is configured to be closed.

The heat-resistant structure has a structure in which a heat insulating material in which rock wool felt is covered with a ceramic fiber bracket is accommodated in a mounting member made of a concave steel plate. A sliding contact rail member made of a concave steel plate is fixed to a lower end portion of the upper outer wall portion, and a sliding contact rail member made of an inverted concave steel plate is fixed to an upper end portion of the lower outer wall portion.
The upper and lower opposing surfaces of each sliding contact rail member are substantially parallel,
The heat-resistant structure is fixed to the upper sliding contact rail member fixed to the lower end of the upper outer wall, and as described above, the relative displacement in the substantially horizontal direction between the upper frame and the lower frame during an earthquake, as described above. Is allowed to close the space between the upper outer wall and the lower outer wall, thereby preventing the intrusion of a flame in the event of a fire between the outer outside of each outer wall and the inner inside of each outer wall.

[0004]

In such a conventional technique, a heat-resistant structure is interposed between an upper outer wall and a lower outer wall. Although it is possible to prevent the leakage of the flame from the inside to the outside, the sliding rail members provided at the lower end of the upper outer wall and the upper end of the lower outer wall are structurally continuous and integral between the outside and the inside, respectively. When a fire occurs outside or inside, and the portion protruding to the side where the fire occurred is heated by the flame, the heat is transmitted to the side where the fire has not occurred. In addition, it is not possible to completely insulate the outside and the inside from each other, and higher fire resistance is expected. Further, with only the above-mentioned heat-resistant structure, it is not possible to reliably shut off wind and rainwater blown from the outside to the inside, and higher watertightness and airtightness are expected.

It is an object of the present invention to allow relative displacement between an upper frame and a lower frame, reliably prevent rainwater and air from entering the building from the outside to the inside, and provide high fire resistance between the outside and the inside. An object of the present invention is to provide a fireproof structure for an outer wall of a base-isolated building that can be maintained regardless of the above displacement.

[0006]

According to the first aspect of the present invention, a seismic isolation device is interposed between an upper frame and a lower frame which are structurally separated, and the upper frame and the lower frame are substantially separated. It is supported so as to be relatively displaceable in the horizontal direction, and is provided between the lower end of the upper outer wall of the upper frame and the upper end of the lower outer wall of the lower frame. In the external fire protection structure of a base-isolated building that allows a vertical displacement and closes the space between the upper outer wall of the upper frame and the lower outer wall of the lower frame, at the lower end of the upper outer wall and the upper end of the lower outer wall, First mounting bodies having parallel sliding surfaces opposed to each other with an upper and lower space are respectively fixed, and a second mounting body is vertically spaced on the outer side of each of the first mounting bodies. Each is fixed, and a refractory member can slide between the sliding surfaces between the first mounting bodies. To be clamped, between each second attachment member, with a watertight sealing material is provided on the outer side, which is the outer wall fire structure seismic isolation building, characterized in that hermetic sealing material inside side is provided.

According to the present invention, the first mounting member is fixed to the lower end of the upper outer wall and the upper end of the lower outer wall.
A second mounting body is fixed to the outer side of the mounting body. Each of the first attachment bodies has parallel sliding surfaces opposed to each other at an interval vertically, and a refractory member is interposed between the sliding surfaces. Since this refractory member is slidably held between the sliding surfaces,
Even if the upper frame and the lower frame are relatively displaced in a substantially horizontal direction due to the earthquake, the refractory member slides on each sliding surface, thereby causing the refractory member to move relative to each sliding surface. Damages or breaks due to temporary displacement are prevented, the gaps between the sliding surfaces are reliably closed, and in the event of a fire occurring outside the building, the flame is prevented from entering the inside from the outside, and In the case of a fire occurring inside a building, it is possible to prevent flame from leaking from the inside to the outside, and to maintain high fire resistance between the outside and the inside, regardless of the relative displacement between the frames.

A watertight seal is provided between the second mounting members on the outside and an airtight seal is provided on the inside. Therefore, both the watertight sealing material and the airtight sealing material are provided on the outer side of the refractory member between the above-mentioned first mounting bodies, and it is possible to reliably prevent rainwater from entering the inside from the outside and air from entering by the wind. Can be prevented. Further, since the watertight seal member is provided on the outer side of the airtight seal member, the first and second upper portions provided on the upper outer wall portion are provided.
First and second lower portions provided on the mounting body and the lower outer wall portion
In the space between the mounting members, it is possible to block rainwater on the outermost side, whereby the capillary phenomenon at the contact surface between the airtight sealing member and each of the second mounting members, and the refractory member and each of the first mounting members, The rainwater from the outside to the inside can be reliably prevented from invading the inside from the outside due to the capillary action at the contact surface of the surface or the suction effect due to the differential pressure when the inside pressure becomes low with respect to the outside. Can be reliably prevented from entering. In this way, the horizontal relative displacement between the upper building and the lower building can be allowed, rainwater and air can be prevented from entering the building from outside to inside, and high fire resistance between the outside and inside can be achieved. Can be achieved simultaneously.

According to a second aspect of the present invention, in the configuration according to the first aspect, each of the first mounting bodies is disposed on an outer side of a refractory metal disposed on an outer side and on an inner side. And a heat insulating member interposed between the outer-side mounting portion and the inner-side mounting portion.

According to the present invention, each of the first mounting members is
It has an outer attachment portion, an inner attachment portion, and a heat insulating member. Each of the outer and inner mounting parts has a melting point of at least 150, such as a refractory metal such as structural steel.
A metal higher than about 0 ° C. is used. The choice of such a high melting point metal depends on the flame at the time of the fire.
This is to prevent the resin from melting and falling off from the upper outer wall portion and the lower outer wall portion even when exposed to a high temperature of about 00 to 1500 ° C. In addition, since a heat insulating member is interposed between the outer and inner mounting parts, a fire occurs outside and inside, and the heat of the fire causes the outer or inner mounting part to be damaged. Even if heated, the heat is transmitted to the inner mounting portion or the outer mounting portion disposed on the side where no fire has occurred, thereby reliably preventing the inconvenience of causing fire spread. be able to.

According to a third aspect of the present invention, in the configuration according to the first or second aspect, the second mounting member provided at the upper end of the lower outer wall portion is provided in a space between the watertight sealing material and the airtight sealing material. It is characterized in that it has a concave water collecting groove that opens to face.

According to the present invention, since the water collecting groove is provided in the second mounting member provided at the upper end portion of the lower outer wall portion, the water which cannot be completely shut off by the above-mentioned water-tight sealing material and intrudes into the inside is hermetically sealed. It is possible to achieve an even higher level of watertightness by shutting off at the preceding stage without adding materials and penetrating inside.

According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the refractory member is wrapped by an outer sheet in which a filling material made of a refractory fiber is made of a metal thin film. It is a refractory mat.

According to the present invention, since a refractory mat is used as the refractory member, the refill material made of a refractory fiber is sandwiched by an outer sheet made of a metal thin film. Due to the large elasticity, the refractory member can be constantly and elastically brought into contact with each sliding surface of the first mounting body over a wide range, and the generation of a gap can be prevented. In addition, since this filling material is surrounded by a metal thin film, even if each frame is relatively displaced during an earthquake, friction between each sliding surface of each first mounting body and the refractory member is reduced. And thereby permitting relative displacement of each first member with respect to the refractory member,
It is possible to reliably prevent damage and gaps due to catching on the mounting member and the like, and achieve and maintain fire resistance performance with high reliability against relative displacement of each frame during an earthquake.

[0015]

FIG. 1 is a vertical sectional view of an outer wall fire protection structure 1 having an outer wall fire prevention structure of a base-isolated building according to one embodiment of the present invention, and FIG. 2 is an outer wall fire prevention structure shown in FIG. FIG. 3 is a partial front view of the structure 1 as viewed from the outside 5 side, and FIG.
FIG. 3 is a cross-sectional view taken along line III-III of FIG. FIG. 1 is a cross-sectional view taken along line II of FIG. In the base-isolated building A, a seismic isolation device 4 (see FIG. 3), which will be described later, is interposed between an upper frame 2 and a lower frame 3 that are structurally separated, and the upper frame 2 is attached to the lower frame 3 as shown in FIG. Between the lower end 9 of the upper outer wall 7 of the upper frame 2 and the upper end 10 of the lower outer wall 8 of the lower frame 3. Exterior wall fire protection structure 1
Is provided. The outer wall fire protection structure 1 allows the relative displacement of the upper frame 2 and the lower frame 3 in the substantially horizontal direction, and a space between the upper outer wall 7 of the upper frame 2 and the lower outer wall 8 of the lower frame 3. 11 can be closed.

The lower end 9 of the upper outer wall 7 and the upper end 10 of the lower outer wall 8 are opposed to each other at an interval .DELTA.L1 in the vertical direction of FIG.
b are fixed respectively. Side portion 1 on the outside 5 side of each first mounting body 13a, 13b
Second attachment bodies 15a, 15b are fixed to 4a, 14b with an interval ΔL2 vertically. A refractory member 16 is provided between each of the first mounting bodies 13a and 13b.
a and 12b so as to be slidable. Each second mounting body 1
Between 5a and 15b, a watertight sealing material 21 is provided on the outside 5 side, and an airtight sealing material 22 is provided on the inside 6 side. The watertight sealing member 21 is also called a rain barrier, and is made of a material having flexibility, elasticity, and weather resistance. As such a material, for example, ethylene propylene rubber (abbreviated as EPDM) is used. The hermetic sealing material 22 is also called a wind barrier, and is made of a material having flexibility and elasticity. These watertight sealing materials 2
The first seal member 22 and the hermetic seal member 22 are attached to the upper second attachment body 15a, and resiliently contact the lower second attachment body 15b. The hermetic sealing member 22 may be made of fire-resistant silicone rubber.

With the above configuration, even if the upper frame 2 and the lower frame 3 are relatively displaced in a substantially horizontal direction due to an earthquake, the refractory member 16 slides on the sliding surfaces 12a and 12b. This causes the relative displacement between the refractory member 16 and each of the sliding surfaces 12a, 12b to cause the refractory member 16 to move.
Is prevented from being damaged or broken, and each sliding surface 1
By closing the gap between 2a and 12b, it is possible to prevent the fire from occurring on the outside 5 side of the building from invading the flame from the outside 5 to the inside 6; Leakage of the flame from the inside 6 to the outside 5 is prevented, and high fire resistance between the outside 5 and the inside 6 can be maintained regardless of the relative displacement between the frames 2 and 3.

Further, between each of the second mounting members 15a and 15b,
A watertight sealing material 21 is provided on the outside 5 side, and an airtight sealing material is provided on the inside 6 side. Therefore, both the water-tight seal member 21 and the air-tight seal member 22 are provided on the outer side of the refractory member 16 between the first mounting members 13a and 13b, and rainwater enters the inner portion 6 from the outer portion 5. Further, it is possible to reliably prevent air from entering due to wind.
In addition, the watertight sealing material 21 is
, The upper first and second mounting bodies 13a, 15a provided on the upper outer wall 7 and the lower first and second mounting bodies 13b, 15b provided on the lower outer wall 8
In the space 11 between the first and second mounting members 15a and 15b, it is possible to block rainwater at the outermost side of the outermost 5 side. First attachment bodies 13a, 13b
It is possible to reliably prevent rainwater from entering the inside 6 from the outside 5 due to the capillary phenomenon at the contact surface with the inside or the suction action by the differential pressure when the pressure in the inside 6 becomes lower than the outside 5. In addition, it is possible to reliably prevent rainwater from entering the inside 6 from the outside 5.

In this manner, relative displacement in the horizontal direction between the upper frame and the lower frame is permitted, rainwater and air are prevented from invading from the exterior 5 to the interior 6 of the building. Thus, high fire resistance performance against fire can be achieved at the same time.

Each of the first mounting members 13a and 13b has an outer mounting member portion 25a and 25b made of a refractory metal disposed on the outer side 5 and an inner portion made of a refractory metal disposed on the inner 6 side. Side attachment portions 26a, 26b, outer attachment portions 25a, 25b and inner attachments 26a, 2
6b.
These outer attachment portions 25a, 25b, inner attachment portions 26a, 26b, and heat insulating members 27a, 27b
Is a bolt 28 and a nut 2 screwed onto the screw shaft thereof.
9 connect the heat insulating members 27a and 27b to each other from both sides.

Each of the outer and inner attachment portions 25
For a, 25b; 26a, 26b, a refractory metal, for example, a metal having a melting point higher than about 1500 ° C., such as a structural steel material, is used. The choice of a metal with such a high melting point depends on the flame at the time of the fire, 1400-150.
This is to prevent the resin from melting and falling off from the upper outer wall and the lower outer wall even when exposed to a high temperature of about 0 ° C. In addition, the outer and inner attachment portions 25a,
25b; insulating members 27a, 27b between 26a, 26b
, Respectively, regardless of whether a fire occurs in the outside 5 or the inside 6, the heat of the fire causes the external attachment portions 25 a, 25 b or the internal attachment portions 26.
Even if a and 26b are heated, the heat is transmitted to the internal mounting portions 26a and 26b or the external mounting portions 25a and 25b disposed on the side where no fire occurs, and
The inconvenience of causing fire spread can be reliably prevented.

The upper second mounting member 15a provided at the upper end portion 10 of the lower outer wall portion 8 has a concave water collecting groove opening toward the space 31 between the watertight sealing member 21 and the airtight sealing member 22. 32. With such a water collecting groove 32, water that cannot be completely shut off by the above-mentioned watertight sealing material 21 and enters the inside 6 side is cut off at the preceding stage without entering the inside 6 beyond the airtight sealing material 22. Higher watertightness can be achieved.

Each of the first mounting members 13a and 13b has substantially W-shaped clip pieces 47a and 47b which are fixed to the outer mounting portions 25a and 25b by welding. One end of the clip pieces 47a and 47b on the inner side 6 is fixed to each of the outer attachment portions 25a and 25b, and the other end disposed on the outer side 5 is an upper layer outer wall portion by anchor bolts 48a and 48b. The holding pieces 50a, 50b of the fasteners 49a, 49b fixed to the lower wall 7 and the lower outer wall 8, respectively, are resiliently pressed and held on the outer attachment portions 25a, 25b. The fasteners 49a and 49b are fixed to the upper outer wall portion 7 and the lower outer wall portion 8 by the anchor bolts 48a and 48b, respectively.
a, 51b. The holding piece 50a is fixed to the upper edge member 51a together with the upper second attachment body 15a by a bolt 52a and a nut 53a.

The lower edge member 51b has a cross-sectional shape of L
The letter-shaped reinforcing member 54 is fixed by welding, and the lower second attachment body 15b is fixed to the reinforcing member 54 by bolts 52b and nuts 53a. The second attachment body 15a disposed above has an upper wall 55 inclined downward toward the outside 5 side, and a substantially horizontal lower wall 56. A drain hole 57 penetrating in the thickness direction is formed in the upper wall 55, and a drain hole 58 formed below the drain hole 57 of the upper wall 55 is provided in the lower wall 56. Each drain hole 57, 58
Is the water collecting groove 3 of the second mounting body 15b provided below.
2, the water dropped through the drain holes 57, 58 is dropped into the drain groove 32, and the upper second mounting body 15 a
Can be discharged from the internal space. The lower second attachment body 15 b has an upper wall 61 and a lower wall 62. The upper wall 61 has the water collecting groove 32 described above, and the water collecting groove 3
A drain hole 64 is formed in the second bottom wall portion 63.

A drain hole 65 is formed in the lower wall 62 on the outside 5 side with respect to the drain hole 68 of the bottom wall portion 63. The water collected in the water collecting groove 32 falls through the drain hole 64 of the upper wall 61 into the space inside the second attachment body 15b, and falls downward from the drain hole 65 of the lower wall 62 on the outside 5 side. Is discharged.
The upper surface of the lower wall 62 has a drainage gradient that slopes downward from the interior 6 toward the exterior 5 to prevent water from accumulating in the second attachment body 15b. On both sides of the water collecting groove 32 in the substantially horizontal direction (the left-right direction in FIG. 1), the lower end portions of the watertight seal member 21 and the confidential seal member 22 are located above the bottom wall portion 63 which resiliently abut respectively. Raised flat contact surfaces 66, 67 are formed. Each contact surface 66, 6
7 is flush with the lower sliding surface 12b.

The above-mentioned refractory member 16 comprises a filling material 34 made of refractory fiber and an outer sheet 35 made of a metal thin film.
Composed as a fireproof mat wrapped by. Ceramic fibers (abbreviated as CF) can be used as the refractory fibers. An aluminum glass cloth (abbreviated as AGC) is preferably used as the metal thin film. The thickness of the exterior sheet 35 is preferably about 0.05 to 0.1 mm. Since a thin film is used as the exterior sheet 35 in this way, even if a fire occurs in any of the outside 5 and the inside 6, heat is radiated while heat is conducted from one of the outside 5 and the inside 6 to the other. The heat insulation effect can be achieved.

Furthermore, since the filling material 34 is made of fire-resistant fiber, there is no danger that the fiber itself will burn, and the fire-resistant member 16 is connected to the upper and lower first mounting members 1 by the elastic recovery force of the fiber.
3a, 13ba sliding surfaces 12a, 12b facing each other
It always comes into contact elastically and there is no gap. As a result, it is possible to reliably prevent the flame generated at the time of the fire from intruding from one of the outside 5 and the inside 6 into the other.

Further, since the exterior sheet 35 is made of metal, each sliding surface 12a,
Even if the upper outer wall portion 7 and the lower outer wall portion 8 are relatively displaced in a substantially horizontal direction during an earthquake, the refractory member 16 may be caught on the sliding surfaces 12a and 12b.
Can be prevented from being damaged, the relative displacement between the upper layer and the lower layer outer wall portions 7 and 8 can be smoothly allowed, and the fire resistance performance can be maintained.

In another embodiment of the present invention, the exterior sheet 35 may be made of a stainless steel foil having a thickness of about 0.05 to 0.1 mm. By using a stainless steel foil as the exterior sheet 35 in this manner, a large tensile strength can be obtained, and each sliding surface 1 caused by a sudden earthquake can be obtained.
Even if a large tensile force acts on the exterior sheet 35 from the 2a, 12b, the external sheet 35 can withstand a large strength, and is prevented from being damaged, whereby a gap is generated between the sliding surfaces 12a, 12b. Flame or high temperature combustion gas
And it can be reliably prevented from flowing out from either one of the inside 6 to the other, and the fire resistance performance can be improved.

Further, each of the second mounting bodies 15a and 15b is shown in FIG.
As shown in the vertical sectional view of FIG. 3, the upper and lower first attachment bodies 13a and 13b and the refractory member 16 interposed therebetween are continuous at the joint 37 interrupted in the extending direction perpendicular to the paper surface of FIG. In order to achieve watertightness and airtightness, a joint material 37 made of refractory silicon rubber is interposed in the area around the joint. In this way, the fireproof structure is provided continuously without being divided in the extending direction,
Fire resistance can be achieved over the entire circumference of the outer wall of the building.

FIG. 4 is a vertical sectional view showing a simplified structure of a base-isolated building 41 provided with the outer-wall fire protection structure 1.
As described above, the seismic isolation building 41 includes the upper frame 2 and the lower frame 3 that are structurally separated, and the plurality of seismic isolation devices 4 interposed between the upper frame 2 and the lower frame 3. The above-described outer wall fire protection structure 1 is interposed between the lower end 9 of the upper layer upper wall 7 of the upper frame 2 and the upper end 10 of the lower outer wall 8 of the lower frame 3. These seismic isolation devices 4 can tolerate substantially horizontal relative displacement between the upper frame 2 and the lower frame 3 in a circular range with a radius R = 250 mm when an earthquake occurs.

Even if such a relative displacement between the upper frame 2 and the lower frame 3 occurs, the displacement is allowed by the above-mentioned fire protection structure 1 for the outer wall, and air from rain 5 and wind from the outside 5 to the inside 6 due to the wind and the like. From the outside 5 to the inside 6
It is possible to reliably prevent the intrusion of the flame into the inside and the leakage of the flame from the inside 6 to the outside 5 and reliably prevent the spread of fire.

FIG. 5 is a sectional view showing a refractory member 16a according to another embodiment of the present invention. Corresponding parts have the same reference characters allotted, and description thereof will not be repeated. The refractory member 16a according to the present embodiment is provided on the sliding surface 1 of the lower first mounting body 13b.
Sliding guide surfaces 42a, 42b are formed at the lower portion sliding along 2b, inclining in a direction ascending upward from the center in the width direction on both sides in the width direction between the exterior 5 and the interior 6. By interposing the refractory member 16b having the sliding guide surfaces 42a and 42b between the first attachment bodies 13a and 13b instead of the refractory member 16 of the above-described embodiment,
Even if the upper and lower frames 2, 3 are relatively displaced in a substantially horizontal direction at the time of the earthquake, the relative displacement of the lower sliding surface 16b relative to the refractory member 16a is easily allowed, and It is possible to prevent troubles such as catching.

FIG. 6 is a sectional view showing a refractory member 16b according to still another embodiment of the present invention. Parts corresponding to the refractory members 16 and 16a of the above-described embodiments are denoted by the same reference numerals, and description thereof will be omitted. The refractory member 16b of the present embodiment is provided on the sliding surface 12 of the lower first mounting body 13b.
A bottom surface 46 is formed such that the lower portion sliding in the direction b has the largest thickness at the center portion 45 in the width direction and has a downwardly convex curved bottom surface 46. The bottom surface 46 contacts the lower sliding surface 12b, and can slide smoothly even when the upper and lower frames 2 and 3 are relatively displaced in a substantially horizontal direction.

FIG. 7 is a sectional view showing a refractory member 16c according to still another embodiment of the present invention. Parts corresponding to the refractory members 16, 16a, and 16b of the above-described embodiments are denoted by the same reference numerals, and description thereof will be omitted to avoid duplication. The refractory member 16c of the present embodiment includes, as the filling material 34, a first filling material 34a made of the same ceramic fiber as in the above-described embodiment and a second filling material 34b made of an expandable ceramic fiber. Become. The second filling material 3
No. 4b shows a mixture obtained by mixing vermiculite (hyperstone), a ceramic fiber, and an additive, and curing the mixture with an adhesive.

By providing such a second filling material 34b, when the temperature of the lower first mounting body 13b rises in the event of a fire, the second filling material 34b expands due to the heat, and the refractory member 16c is removed. Inflate the upper and lower sliding surfaces 12
a, 12b so as to prevent the occurrence of a gap, thereby achieving even higher fire protection performance.

[0037]

According to the first aspect of the present invention, the first mounting members are fixed to the lower end of the upper outer wall and the upper end of the lower outer wall. Is fixed to the second mounting body. Each of the first attachment bodies has parallel sliding surfaces opposed to each other at an interval vertically, and a refractory member is interposed between the sliding surfaces. Since this refractory member is slidably held between the respective sliding surfaces, even if the upper frame and the lower frame are relatively displaced in a substantially horizontal direction due to an earthquake, the sliding surfaces are formed on the respective sliding surfaces. On the other hand, the refractory member slides, thereby preventing the refractory member from being damaged or broken by the relative displacement of each sliding surface, securely closing the gap between the respective sliding surfaces, and preventing the outside from the building. In the event of a fire, prevent the flame from entering the interior from outside, and in the case of a fire inside the building,
By preventing the flame from leaking from the inside to the outside, high fire resistance between the outside and the inside can be maintained regardless of the relative displacement between the respective frames.

A watertight seal is provided on the outside between the second mounting members, and an airtight seal is provided on the inside. Therefore, both the watertight sealing material and the airtight sealing material are provided on the outer side of the refractory member between the above-mentioned first mounting bodies, and it is possible to reliably prevent rainwater from entering the inside from the outside and air from entering by the wind. Can be prevented. Further, since the watertight seal member is provided on the outer side of the airtight seal member, the first and second upper portions provided on the upper outer wall portion are provided.
First and second lower portions provided on the mounting body and the lower outer wall portion
In the space between the mounting members, it is possible to block rainwater on the outermost side, whereby the capillary phenomenon at the contact surface between the airtight sealing member and each of the second mounting members, and the refractory member and each of the first mounting members, The rainwater from the outside to the inside can be reliably prevented from invading the inside from the outside due to the capillary action at the contact surface of the surface or the suction effect due to the differential pressure when the inside pressure becomes low with respect to the outside. Can be reliably prevented from entering. In this way, the horizontal relative displacement between the upper building and the lower building can be allowed, rainwater and air can be prevented from entering the building from outside to inside, and high fire resistance between the outside and inside can be achieved. Can be achieved simultaneously.

According to the second aspect of the present invention, each of the first mounting members has an outer mounting member, an inner mounting member, and a heat insulating member. For each of the outer and inner mounting portions, a refractory metal, for example, a metal having a melting point higher than about 1500 ° C., such as a structural steel material, is used. The selection of such a high melting point metal prevents the metal from melting and falling off from the upper outer wall and the lower outer wall even when exposed to a high temperature of about 1400 to 1500 ° C. due to the flame at the time of the fire. That's why. In addition, since a heat insulating member is interposed between the outer and inner mounting parts, a fire occurs outside and inside, and the heat of the fire causes the outer or inner mounting part to be damaged. Even if heated, the heat is transmitted to the inner mounting portion or the outer mounting portion disposed on the side where no fire has occurred, thereby reliably preventing the inconvenience of causing fire spread. be able to.

According to the third aspect of the present invention, since the water collecting groove is provided in the second attachment body provided at the upper end of the lower layer outer wall, the watertight sealing member cannot be completely shut off and intrudes into the inside. The added water is shut off at the preceding stage without adding an airtight sealing material to the inside, so that higher watertightness can be achieved.

According to the fourth aspect of the present invention, since a refractory mat is used as the refractory member, in which a filling material made of refractory fiber is sandwiched by an outer sheet made of a metal thin film. Due to the large elasticity of the filling material, the refractory member can be constantly and elastically brought into contact with each sliding surface of the first mounting member over a wide range, and the generation of a gap can be prevented. In addition, since this filling material is surrounded by a metal thin film, even if each frame is relatively displaced during an earthquake, friction between each sliding surface of each first mounting body and the refractory member is reduced. This allows relative displacement of each of the first members with respect to the refractory member, reliably prevents damage and gaps caused by the refractory member being hooked to each of the first mounting members, and prevents the occurrence of an earthquake. It is possible to achieve and maintain the fire resistance performance with high reliability against the relative displacement of each frame.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing an outer wall fire protection structure 1 of a base-isolated building according to an embodiment of the present invention.

FIG. 2 is a partial front view of the outer wall fire protection structure 1 shown in FIG.

FIG. 3 is a vertical cross-sectional view taken along a cutting plane line III-III in FIG. 2;

FIG. 4 is a vertical sectional view showing a simplified configuration of a base-isolated building 41 provided with the outer-wall fire protection structure 1.

FIG. 5 is a cross-sectional view showing a refractory member 16a according to another embodiment of the present invention.

FIG. 6 shows a refractory member 16 according to still another embodiment of the present invention.
It is sectional drawing which shows b.

FIG. 7 shows a refractory member 16 according to still another embodiment of the present invention.
It is sectional drawing which shows c.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 outer wall fire protection structure 2 upper layer frame 3 lower layer frame 4 seismic isolation device 5 outside 6 inside 7 upper layer outer wall 8 lower layer outer wall 9 lower end 10 upper end 12a, 12b sliding surface 13a, 13b first mounting body 14a, 14b side Part 15a, 15b Second mounting body 16, 16a to 16c Fireproof member 21 Watertight sealing material 22 Airtight sealing material 25 External mounting body part 26 Internal mounting body part 27 Heat insulating member 32 Water collecting groove part 34 Filling material 35 Exterior sheet 41 Seismic isolation building

Continued on the front page (72) Inventor Teiji Imai 3-9-39 Mikuni Honcho, Yodogawa-ku, Osaka-shi, Osaka Inside Nippon Aluminum Co., Ltd. (72) Inventor Kazuo Kawakita 3-9-139 Mikuni-honmachi, Yodogawa-ku, Osaka-shi, Osaka No. Japan Aluminum Co., Ltd. F-term (reference) 2E001 DA01 DC02 DG02 FA04 FA53 GA01 GA65 GA72 HB01 HE01 JA13 JA22 JA28 KA01 KA07 LA01 LA09 MA02 MA03 MA04 MA13

Claims (4)

[Claims] 1. An upper seismic isolation device is interposed between an upper structural member and a lower structural member which are structurally separated, and the upper structural member and the lower structural member are supported so as to be relatively displaceable in a substantially horizontal direction. An upper layer outer wall portion provided between a lower end portion of an upper layer outer wall portion of the frame and an upper edge portion of a lower layer outer wall portion of the lower layer frame to allow relative displacement of the upper frame and the lower frame in the substantially horizontal direction, and In the fire protection structure of the outer wall of a base-isolated building that blocks the space between the lower part and the lower part of the lower skeleton, sliding parallel to the lower end of the upper part and the upper part of the lower part with a vertical gap A first mounting body having a surface is fixed, and a second mounting body is fixed to an outer side portion of each first mounting body at an interval vertically, and between the first mounting bodies, A refractory member is slidably held between the respective sliding surfaces, and an outer With watertight sealing material is provided on the side, the outer wall fire structure of seismic isolation building, characterized in that hermetic sealing member is provided on the inner side. 2. Each of the first mounting bodies includes an outer mounting body portion made of a refractory metal disposed on an outer side, an inner mounting body portion made of a refractory metal disposed on an inner side, and an outer side. The outer wall fire protection structure for a base-isolated building according to claim 1, further comprising a heat insulating member interposed between the mounting portion and the inner mounting portion. 3. A second mounting body provided at an upper end portion of the lower outer wall portion has a concave water collecting groove opening toward a space between the watertight sealing material and the airtight sealing material. Item 4. The fire prevention structure for an outer wall of a base-isolated building according to item 1 or 2. 4. The fire-resistant member according to claim 1, wherein the filling material made of fire-resistant fiber is a fire-resistant mat wrapped by an outer sheet made of a metal thin film. Outer wall fire protection structure of seismic isolation building.