JP4420728B2 - Fireproof coating structure for seismic isolation devices - Google Patents

Description

  This invention belongs to the technical field of the fireproof covering structure of the seismic isolation apparatus installed in the middle floor seismic isolation layer of the building.

  Various techniques for fireproof coating of the seismic isolation device have been developed so far so that the load bearing capacity of the seismic isolation device installed in the seismic isolation layer of the intermediate floor of the building does not deteriorate during a fire. Among them, typical covering structures include a split sliding type (Patent Document 1), a multi-stage sliding type (Patent Document 2), a lantern type (Patent Document 3), a winding type (Patent Document 4), a panel rotating type ( Although the covering structure of patent document 5) can be mentioned, there existed problems, such as the periodic maintenance of a seismic isolation apparatus being difficult, or the design property being inferior.

  Therefore, the present applicant has developed the following coating structure and applied for a patent. The covering structure is composed of a calcium silicate plate and surface steel plates on both sides of the fireproof panel, and the upper end of the fireproof panel is structured to be rotatably attached to the upper structure by a hinge mechanism. A covering structure that is easy to maintain is realized (Patent Document 6).

Japanese Patent Laid-Open No. 10-22715 JP 11-71938 A JP-A-3-87443 Japanese Patent Laid-Open No. 10-18433 No. 7-1369 JP 2002-161594 A

  FIG. 5 of Patent Document 6 discloses a form in which the upper end portion of the fireproof panel is attached to the upper structure from the outside by a hinge mechanism as an example of the fireproof panel mounting structure. However, according to the mounting structure, the center of gravity of the refractory panel is located outside, and the refractory panel may naturally rotate outward and open. Therefore, it is necessary to connect adjacent fireproof panels with a restoring member such as a spring to suppress inadvertent rotation of the fireproof panels. Accordingly, depending on the mounting structure of the refractory panel, there is a problem that the construction becomes complicated and the restoring member such as the spring becomes a harmful effect during maintenance. Further, since the hinge mechanism is visually recognized from the outside, there is a problem that the designability is impaired. That is, the coating structure of Patent Document 6 is a technique that still has room for improvement.

The object of the present invention is to support the refractory panel in a substantially central position in the thickness direction at the upper end portions of both side surfaces, so that the center of gravity of the refractory panel is positioned in the approximate center in the thickness direction. An object of the present invention is to provide a fireproof covering structure for a seismic isolation device that does not rotate outwardly and therefore can eliminate a restoring member such as a spring, is easy to construct, and is easy to maintain.
The next object of the present invention is to provide a fireproof covering structure for a seismic isolation device that is excellent in design by making the rotation axis of the fireproof panel invisible from the outside.

As means for solving the problems of the prior art, the fireproof covering structure of the base isolation device according to the invention described in claim 1 is:
It is a fireproof covering structure of a seismic isolation device installed between the upper structure and the lower structure in the seismic isolation layer of the middle floor of the building,
A fire-resistant member such as a fire-resistant board that is slightly higher than the top end of the bolt or nut that joins the lower flange of the seismic isolation device to the lower structure is installed along the outer periphery of the upper surface of the lower structure. thing,
At the four corner positions of the lower surface of the upper structure, the L-shaped hardware supporting the fireproof panel is directed to the other corners in which the inner corner faces the diagonal direction of the upper structure and each plane portion of the L-shaped hardware is adjacent to the side direction. It is attached in an arrangement that faces the plane part of the L-shaped metal part in parallel with the flat part, and a bolt hole is formed at the upper end position of the flat part of the L-type metal part to pass the shaft bolt that becomes the rotation axis of the fireproof panel. thing,
Between the adjacent L-shaped metal parts, a fireproof panel provided with a nut is arranged at a substantially central position in the thickness direction at the upper end of both side surface parts, and the nut is passed through the bolt hole of the L-shaped metal part. The bolts are screwed in and the fireproof panel is rotatably supported,
L-shaped hardware has its outer surface covered with a fireproof block,
Stopper hardware is attached to the corners of the L-shaped hardware or at the four corners of the inner surface of the fireproof panel in the upper structure.

The invention according to claim 2 is the fireproof covering structure of the seismic isolation device according to claim 1,
Gasket or heating on at least one of the lower surface of the upper structure or the upper surface of the fireproof panel, the upper surface of a fireproof member such as a fireproof board or the lower surface of the fireproof panel, and the left and right side surfaces of the fireproof panel or the outer surface of the L-shaped hardware A foam rubber is provided.

The invention according to claim 3 is the fireproof covering structure of the seismic isolation device according to claim 1,
A horizontal member such as an L-shaped metal piece is provided at the lower end portion of the inner side surface of the fireproof panel, and heated foam rubber is provided on the lower surface of the horizontal member.

The invention according to claim 4 is the fireproof covering structure of the seismic isolation device according to claim 1,
A peripheral portion of the nut of the fireproof panel is reinforced with a reinforcing hardware.

The invention according to claim 5 is the fireproof covering structure of the seismic isolation device according to claim 1,
A horizontal flange plate is provided at the upper end portion of the L-shaped metal piece that supports the fireproof panel, and the flange plate is joined to the upper structure by means such as a hole-in anchor.

The invention according to claim 6 is the fireproof covering structure of the seismic isolation device according to claim 1,
The refractory block is characterized by being joined to an L-shaped metal piece that supports the refractory panel by using an inorganic adhesive and a screw together.

In the fireproof covering structure of the seismic isolation device according to the present invention, since the fireproof panel is rotatably supported at the approximate center position in the thickness direction, the center of gravity of the supported fireproof panel is positioned at the approximately center in the thickness direction. Inadvertently rotating outwards will not open. Therefore, it is not necessary to provide a restoring member such as a spring, and the construction is simple. In addition, the fireproof panel can be easily removed simply by removing the fireproof block and loosening the bolts, thereby facilitating maintenance of the seismic isolation device.
Moreover, since the axial bolt of a fireproof panel is hardly visible from the outside, it is excellent in design.

  Examples of the fireproof covering structure of the seismic isolation device according to the invention described in claims 1 to 6 (hereinafter sometimes simply referred to as a covering structure) will be described with reference to FIGS. To do. The covering structure of the present invention is such that the load bearing capacity of the seismic isolation device 1 installed between the upper structure and the lower structure in the seismic isolation layer in the middle floor of buildings such as buildings and condominiums does not decrease during a fire. To be implemented. Incidentally, in this embodiment, the seismic isolation device 1 installed between the upper column 2a and the lower column 2b having a quadrangular cross section is fireproof coated.

  The seismic isolation device 1 is a conventional seismic isolation device having flanges 4 and 5 on the upper and lower sides of a laminated rubber 3, the upper flange 4 is rigidly connected to the upper column 2 a with bolts 6, and the lower flange 5 is the lower column. The bolt 2 is rigidly connected to 2b.

  A refractory board along the outer periphery of the upper surface of the lower column 2b, that is, at the periphery of the lower flange 5 of the seismic isolation device 1, slightly higher in height than the top end of the bolt 6 joining the flange 5 to the lower column 2b. 7 is installed. The refractory board 7 is composed of a refractory member such as a calcium silicate plate, and the upper surface is processed into a smooth finished surface. And this outer peripheral side surface is provided with a decorative steel plate or a stainless steel plate to improve the design (not shown).

  An L-shaped hardware that supports four refractory panels 8 arranged so as to surround the four sides of the seismic isolation device 1 between the refractory board 7 and the upper pillar 2a, that is, along the outer peripheries of the upper and lower pillars 2a and 2b. (Angle members) 9 are attached to the four corner positions on the lower surface of the upper column 2a (see FIGS. 2 and 3). Specifically, the L-shaped metal piece 9 is substantially equal to the height between the fireproof board 7 and the upper column 2a, and a horizontal flange plate 10 for joining to the upper column 2a is provided at the upper end portion thereof. (See FIG. 4). The L-shaped metal piece 9 has a rectangular corner with one side of the fireproof panel 8 arranged along the outer peripheries of the upper and lower pillars 2a and 2b, and the inner corner 9a of the L-shaped metal piece 9 is a diagonal line of the upper pillar 2a. And the flat portion 9b of the L-shaped metal piece 9 is disposed so as to face the parallel to the flat surface portion 9b of the L-shaped metal piece 9 adjacent in the side direction, and the flange plate 10 at the upper end thereof is disposed on the upper column 2a. They are joined by means 11 such as a hole-in anchor (the invention according to claim 5). And the bolt hole 13 which lets the axial bolt 12 used as the rotating shaft of the fireproof panel 8 is formed in the upper end position of the plane part 9b of this L-shaped metal fixture 9. FIG.

  A refractory panel 8 is disposed between the adjacent L-shaped metal pieces 9 and 9, and the refractory panel 8 has a predetermined height clearance so that the upper and lower edges do not come into contact with the pillars 2a and 2b when rotated. It is supported so that it can be rotated by opening H (see FIG. 4). The refractory panel 8 has a sandwich structure in which a refractory member such as a calcium silicate plate is used as a core, and both inner and outer surfaces thereof are covered with a decorative steel plate or a stainless steel plate. The height of the fireproof panel 8 is slightly lower than the height between the fireproof board 7 and the upper column 2a so that a clearance H having a predetermined height can be formed vertically. A nut 14 is embedded at a substantially central position in the thickness direction at the upper end portions of both side surface portions, and the peripheral portion thereof is reinforced by a reinforcing metal 15 (the invention according to claim 4). A shaft bolt 12 passed through the bolt hole 13 of the L-shaped metal piece 9 is screwed into the nut 14. Since the refractory panel 8 is supported at a substantially central position in the thickness direction, the center of gravity of the supported refractory panel 8 is located at a substantially central position in the thickness direction, and does not inadvertently rotate outward. . Therefore, it is not necessary to provide a restoring member such as a spring, and the construction is simple.

  The outer surface of the L-shaped metal piece 9 is covered with a fireproof block 16. The refractory block 16 is also composed of a refractory member such as a calcium silicate plate in the same manner as the refractory board 7, and a decorative steel plate or a stainless steel plate is provided on the outer peripheral side surface to improve the design. The refractory block 16 is joined to the L-shaped metal piece 9 by using the inorganic adhesive 17 and the screw 18 together (the invention according to claim 6), and the refractory block 16 loosens the screw 18 and the L-shaped metal piece. It can be removed by prying the border with 9 with a flathead screwdriver. Therefore, the fireproof panel 8 can be easily removed simply by removing the fireproof block 16 and loosening the shaft bolt 12, and the maintenance of the seismic isolation device 1 can be facilitated. Further, the head portion of the shaft bolt 12 is completely hidden by the fireproof block 16, and the shaft portion of the coaxial bolt 12 is located at a substantially central position in the thickness direction of the fireproof panel 8, so that it is hardly visible from the outside, and the design is improved. Are better.

  In the vicinity of the inner corner portion 9 a of the L-shaped metal piece 9, a stopper metal piece 19 for preventing inward rotation of the fireproof panel 8 is installed. This is to stabilize the fireproof panel 8 during normal times and fires (see FIG. 3).

  On the lower surface of the upper column 2a, the upper surface of the fireproof board 7, and the left and right side surfaces of the fireproof panel 8, in order to prevent the inflow of fire heat in the event of a fire, a heated foam rubber 20 such as a butyl rubber system having a predetermined fire resistance performance. (However, a silicone gasket or the like may be used.) (Invention of Claim 2). In the event of a fire, the heated foamed rubber 20 is foamed, and the inflow of fire heat from the upper and lower clearances H and the left and right fore ends of the fireproof panel 8 can be prevented.

  When the horizontal displacement due to an earthquake or the like occurs in the covering structure having the above configuration, as shown in FIG. 5, the fireproof panel 8 positioned on the horizontal deformation side is prevented from rotating inward by the stopper hardware 19. Move horizontally while maintaining a vertical state. The fireproof panel 8 on the other side moves horizontally while maintaining a substantially vertical state until it comes into contact with the seismic isolation device 1, and after contact comes to rotate outward so as to be pushed out by the seismic isolation device 1. At the time of swinging back, the fire-resistant panel 8 that has followed the rotation has a center of gravity at a substantially central position in the thickness direction. Therefore, the fire-resistant panel 8 naturally rotates inward due to its own weight and comes into contact with the stopper hardware 19. Restored to its original form. Therefore, a restoring member such as a spring is still unnecessary. Further, the seismic isolation device 1 is not damaged and the horizontal displacement is not disturbed.

  Incidentally, in order to reliably prevent the inflow of fire heat, as shown in FIG. 6, an L-shaped hardware 21 (however, any member that can be extended in the horizontal direction) is provided at the lower end portion of the inner surface of the fireproof panel 8. It is preferable to provide the heat-foamed rubber 20 also on the lower surface of the L-shaped metal piece 21. As shown in FIG. 7, the installation area of the heated foam rubber 20 in the horizontal direction is widened, and even if the fireproof panel 8 opens to the outside in the event of a fire, the clearance between the fireproof board 7 and the fireproof panel 8 is ensured. It can be blocked to prevent the inflow of fire.

  In addition, in the said embodiment, although the fireproof board 7 was installed in the peripheral part of the lower flange 5 of the seismic isolation apparatus 1, even if it installs the member which has fireproof performance, for example, mortar, it can implement similarly.

  Moreover, in the said embodiment, although the fireproof panel 8 made into the sandwich structure which made the calcium silicate board the core material and coat | covered the inner and outer surfaces with the decorative steel plate or the stainless steel plate was used, it coat | covered with the decorative steel plate or the stainless steel plate. It can also be implemented with no fireproof panel.

It is the elevation which showed notionally the fireproof covering structure of the seismic isolation apparatus which concerns on this invention. It is the horizontal sectional view which showed notionally the fireproof covering structure of the seismic isolation apparatus which concerns on this invention. It is the figure which showed the joint structure of a fireproof panel, an L-shaped metal fitting, and a fireproof block. It is AA arrow sectional drawing of FIG. It is the elevation which showed notionally the time of horizontal displacement of the fireproof covering structure of the seismic isolation device concerning the present invention. It is the elevation which showed the lower structure of a different fireproof panel. FIG. 7 is an elevational view showing a state where the lower structure of the fireproof panel of FIG. 6 is rotated outward in the event of a fire.

Explanation of symbols

1 Seismic isolation device 2a Upper column (upper structure)
2b Lower pillar (lower structure)
3 Laminated rubber 4, 5 Flange 6 Bolt 7 Fireproof board 8 Fireproof panel 9 L-shaped hardware 12 Shaft bolt 13 Bolt hole 14 Nut 15 Reinforcement hardware 16 Fireproof block 17 Inorganic adhesive 18 Screw 19 Stopper hardware 20 Heating foam rubber 21 L-shaped hardware

Claims (6)

It is a fireproof covering structure of a seismic isolation device installed between the upper structure and the lower structure in the seismic isolation layer of the middle floor of the building,
A fire-resistant member such as a fire-resistant board that is slightly higher than the top end of the bolt or nut that joins the lower flange of the seismic isolation device to the lower structure is installed along the outer periphery of the upper surface of the lower structure. thing,
At the four corner positions of the lower surface of the upper structure, the L-shaped hardware supporting the fireproof panel is directed to the other corners in which the inner corner faces the diagonal direction of the upper structure and each plane portion of the L-shaped hardware is adjacent to the side direction. It is attached in an arrangement that faces the plane part of the L-shaped metal piece parallel to the plane part, and a bolt hole is formed at the upper end position of the plane part of the L-type metal part to pass the shaft bolt that becomes the rotation axis of the fireproof panel. thing,
Between the adjacent L-shaped metal parts, a fireproof panel provided with a nut is disposed at a substantially central position in the thickness direction at the upper end of both side surface parts, and the nut is passed through the bolt hole of the L-shaped metal object. The bolts are screwed in and the fireproof panel is rotatably supported,
L-shaped hardware has its outer surface covered with a fireproof block,
A fireproof covering structure for a seismic isolation device, characterized in that stopper hardware is attached in the vicinity of the corners of the L-shaped hardware or at the four corner positions of the inner surface of the fireproof panel in the upper structure.   Gasket or heating on at least one of the lower surface of the upper structure or the upper surface of the fireproof panel, the upper surface of a fireproof member such as a fireproof board or the lower surface of the fireproof panel, and the left and right side surfaces of the fireproof panel or the outer surface of the L-shaped hardware The fireproof covering structure for a seismic isolation device according to claim 1, wherein foamed rubber is provided.   The seismic isolation system according to claim 1, wherein a horizontal member such as an L-shaped hardware is provided at the lower end portion of the inner side surface of the fireproof panel, and heated foam rubber is provided on the lower surface of the horizontal member. Equipment fireproof coating structure.   2. The fireproof covering structure for a seismic isolation device according to claim 1, wherein a peripheral portion of the nut of the fireproof panel is reinforced with a reinforcing metal.   A horizontal flange plate is provided at an upper end portion of an L-shaped metal member that supports the fireproof panel, and the flange plate is joined to the upper structure by means such as a hole-in anchor. The fireproof covering structure of the seismic isolation device described in 1.   The fireproof covering structure for a seismic isolation device according to claim 1, wherein the fireproof block is joined to an L-shaped metal piece that supports the fireproof panel by using an inorganic adhesive and a screw together.

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