JP2005320744A - Fire-resistant coating structure of base isolation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire-resistant coating structure of a base isolation device installed in a base isolation layer at an intermediate story of a building. <P>SOLUTION: A member having fire resistance is installed along the outer periphery of an upper face of a lower part structural body. A flat plate on one side constituting a hinge mechanism is joined with a lower face of an super structural body. Length of a horizontal face part of an L-shaped plate connected with the flat plate by a rotary shaft is substantially half of thickness of a fire-resistant panel. A vertical face part is joined with an upper end part of the fire-resistant panel. Stopper hardware is attached to four corner positions on an inner side face of the fire-resistant panel in the super structural body. A gasket or a heated foaming rubber is provided on upper and lower faces of the fire-resistant panel and in a header of the fire-resistant panel. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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 the adjacent fireproof panels with a restoring member such as a spring having a strong restoring force (hereinafter sometimes simply referred to as a restoring member) to suppress inadvertent rotation of the fireproof panel. Therefore, depending on the mounting structure of the refractory panel, there is a problem in that the restoring force of the restoring member is strong, so that the construction is complicated, or the maintenance becomes harmful. That is, the coating structure of Patent Document 6 is a technique that still has room for improvement.

  An object of the present invention is to support the fireproof panel rotatably at a substantially central position in the thickness direction at the upper end portion, so that the center of gravity of the fireproof panel is located at a substantially central position in the thickness direction and is inadvertently opened outward. Rotation can be prevented, and therefore a restoring member is not always necessary, and just in case the adjacent fireproof panels are connected with each other by a restoring member, the restoring force may be weak, so that construction is simple and maintenance is not necessary. It is to provide a fireproof covering structure for an easy seismic isolation device.

As means for solving the problems of the prior art, the fireproof covering structure of the seismic isolation device according to the invention described in claim 1 is:
It is a fireproof covering structure of a seismic isolation device installed between an upper structure and a lower structure of an intermediate floor seismic isolation layer of a 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. about,
One flat plate that constitutes a hinge mechanism that rotatably supports a fireproof panel arranged in a rectangle along the outer periphery of the lower surface of the upper structure is joined to the lower surface of the upper structure. The horizontal plane portion of the connected L-shaped plates is approximately half the length of the thickness of the fireproof panel, and the vertical surface portion is joined to the upper end portion of the fireproof panel,
Stopper hardware is attached to the four corner positions of the inner surface of the fireproof panel in the upper structure,
A gasket or heated foam rubber is provided on at least one of the lower surface of the upper structure or the upper surface of the fireproof panel, the upper surface of the fireproof member such as a fireproof board or the lower surface of the fireproof panel, and the small openings between adjacent fireproof panels. It is characterized by being.

The invention according to claim 2 is the fireproof covering structure of the seismic isolation device according to claim 1,
Two refractory panels adjacent to each other at right angles across the stopper hardware are connected to each other by a restoring member such as a spring.

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.

  Since the fireproof covering structure of the seismic isolation device according to the present invention supports the center position in the thickness direction at the upper end of the fireproof panel so as to be rotatable by a hinge mechanism, the center of gravity of the supported fireproof panel is in the thickness direction. It is located at the approximate center of the door and does not rotate and rotate unintentionally. Therefore, there is no particular need to connect adjacent fireproof panels with a restoring member such as a spring. Even if it connects with a restoring member just in case, the restoring force may be weak, a restoring member with easy handling can be used, and construction is simple. Moreover, even if the adjacent fireproof panels are connected by a restoring member, the fireproof panel can be easily opened by human power, so simply open the fireproof panel, remove the restoring member, and loosen the bolts. Can be removed and maintenance of the seismic isolation device can be facilitated.

  Embodiments of the fireproof covering structure (hereinafter sometimes simply referred to as a covering structure) of the seismic isolation device according to the invention described in claims 1 to 3 will be described below with reference to FIGS. To do. In the covering structure of the present invention, the load supporting ability of the seismic isolation device 1 installed between the upper structure and the lower structure of the intermediate floor seismic isolation layer of a building such as a building or a condominium is not lowered in the event of 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 is slightly higher in height than the top end of the bolt 6 joining the flange 5 to the lower column 2b. 7 is installed (see FIGS. 1 and 2). 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).

  Between the fireproof board 7 and the upper pillar 2a, the four fireproof panels 8 arranged in a rectangle so as to surround the four sides of the seismic isolation device 1, that is, along the outer peripheries of the upper and lower pillars 2a, 2b, can be rotated. Two supporting hinge mechanisms 9 are provided on each lower side of the upper column 2a (see FIG. 2). Specifically, as shown in FIGS. 3 and 5, the hinge mechanism 9 is formed by connecting a flat plate 10 and an L-shaped plate 11 by a rotating shaft 12, and a bolt hole 10 a of the flat plate 10 is an upper column 2 a. The anchor bolts 13 are passed through the anchor bolts 13, and nuts 14 are screwed into the anchor bolts 13 and joined together. The horizontal surface portion 15 of the L-shaped plate 11 of the hinge mechanism 9 is approximately half the thickness of the thickness of the fireproof panel 8, and the outer end portion thereof is the end portion of the flat plate 10 and the rotating shaft. 12 are connected. And the bolt hole 16a is formed in the vertical surface part 16 continuing from the edge part of an inner side so that the upper end part of the fireproof panel 8 may be joined. Incidentally, the thickness around the rotating shaft 12 of the hinge mechanism 9 is equivalent to the clearance so as to form a clearance H so that the outer edge of the upper end does not come into contact with the upper column 2a when the fireproof panel 8 rotates about 45 ° outward. It is said to be thick.

  The fire-resistant panel 8 joined to the hinge mechanism 9 has a sandwich structure in which a fire-resistant member such as a calcium silicate plate is used as a core, and both inner and outer surfaces are covered with a decorative steel plate or a stainless steel plate. As described above, the height of the fireproof panel 8 is slightly lower than the height between the fireproof board 7 and the upper column 2a so as to form not only the clearance H above but also the clearance H below. (See FIG. 1). And the bolt hole 8a penetrated in the thickness direction of the fireproof panel 8 is formed in the position corresponding to the bolt hole 16a of the said hinge mechanism 9 (refer FIG. 5). The bolt hole 8a of the fireproof panel 8 is formed with a bolt head storage portion 8b so that the head of the bolt 17 does not protrude when the bolt 17 is inserted.

  In the fireproof panel 8, the bolt hole 8a is disposed concentrically with the bolt hole 16a of the hinge mechanism 9, the bolt 17 is passed through the bolt holes 8a and 16a, and the nut 18 is screwed and joined to each other. . As a result, the rotating shaft 12 of the hinge mechanism 9 is disposed at a substantially central position in the upper end portion of the fireproof panel 8. That is, since the fireproof panel 8 is supported at a substantially central position in the thickness direction at the upper end portion, the center of gravity of the supported fireproof panel 8 is located at a substantially central position in the thickness direction, and rotates unexpectedly outward. Never open. Therefore, there is no need to provide a restoring member such as a spring, and the construction is simple. Moreover, the fireproof panel 8 can be easily removed simply by loosening the bolts 17, and the maintenance of the seismic isolation device 1 is easy.

  Stopper hardware 19 for preventing inward rotation of the refractory panel 8 is installed at the four corner positions of the inner surface of the refractory panel 8 in the upper column 2a. This is to stabilize the fireproof panel 8 at normal times and fires.

  On the upper and lower surfaces 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 fireproof performance is provided (FIGS. 4 to 6). See). 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. As shown in FIGS. 5 and 6, a silicone-based gasket 21 may be provided on the upper surface of the fireproof panel 8 in addition to the heated foam rubber 20. In this case, the gasket 21 provided in the vicinity of the rotary shaft 12 of the hinge mechanism 5 prevents the hinge mechanism 5 from being damaged in the event of a fire, and serves as a blindfold so that the hinge mechanism 9 cannot be seen from the outside in a normal time. Bear. However, the gasket 21 can be omitted.

  When the horizontal displacement is caused by an earthquake or the like, the covering structure having the above-described structure prevents the fireproof panel 8 positioned on the horizontal deformation side from rotating inward by the stopper hardware 19 as shown in FIG. 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, so that the fire-resistant panel 8 naturally rotates inward by its own weight and comes into contact with the stopper hardware 19. Restored to its original form.

  In the present embodiment, the fireproof panels 8 and 8 on the two sides adjacent to each other at right angles with the stopper metal piece 19 interposed therebetween are not connected to each other by a restoring member such as a spring. As shown in FIG. 2 and FIG. 4 by a dashed line, adjacent fireproof panels 8 and 8 may be connected to each other by a restoring member 22 such as a spring as a precaution (the invention according to claim 2). Since the fireproof panel 8 is supported in a configuration that does not inadvertently rotate outward and does not open, the restoring force may be weak, the restoring member 22 that is easy to handle can be used, and the construction is simple. Moreover, since the fireproof panel 8 can be easily opened by human power, the fireproof panel 8 can be easily removed by opening the fireproof panel 8, removing the restoring member 22, and loosening the bolt 17. Easy maintenance.

  Further, in order to reliably prevent the inflow of fire heat, as shown in FIG. 8, an L-shaped metal piece 23 (however, any member that can be extended in the horizontal direction) is provided at the lower end portion of the inner side 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 23 (the invention according to claim 3). As shown in FIG. 9, the installation area of the heated foam rubber 20 in the horizontal direction is expanded, and even if the fireproof panel 8 opens outward in the event of a fire, the clearance between the fireproof board 7 and the fireproof panel 8 is surely secured. It can be blocked to prevent the inflow of fire.

  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 fire resistance, for example, mortar, it can implement similarly.

  In the above embodiment, the fireproof panel 8 having a sandwich structure in which a calcium silicate plate is used as a core and both inner and outer surfaces are covered with a decorative steel plate or a stainless steel plate is used. It can also be implemented using a 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 figure which showed the AA arrow sectional drawing of FIG. 1 on the left side, and the BB arrow sectional drawing on the right side. It is the figure which showed the joining structure of a fireproof panel, a hinge mechanism, and a stopper metal fitting. It is CC sectional view taken on the line of FIG. It is sectional drawing which expanded and showed the periphery of the hinge mechanism. It is sectional drawing which showed the heating foam rubber and gasket arrange | positioned in the site | part which does not have a hinge mechanism in the clearance of a fireproof panel and an upper column. 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. 9 is an elevational view showing a state where the lower structure of the fireproof panel in FIG. 8 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)
DESCRIPTION OF SYMBOLS 3 Laminated rubber 4, 5 Flange 6 Bolt 7 Fireproof board 8 Fireproof panel 9 Hinge mechanism 10 Flat plate 11 L-shaped plate 12 Rotating shaft 15 Horizontal surface portion of L-shaped plate 16 Vertical surface portion of L-shaped plate 19 Stopper metal 20 Heating foam rubber 21 Gasket 22 Restoring members such as springs 23 L-shaped hardware

Claims (3)

It is a fireproof covering structure of a seismic isolation device installed between an upper structure and a lower structure of an intermediate floor seismic isolation layer of a 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. about,
One flat plate that constitutes a hinge mechanism that rotatably supports a fireproof panel arranged in a rectangle along the outer periphery of the lower surface of the upper structure is joined to the lower surface of the upper structure. The horizontal plane part of the connected L-shaped plate is approximately half the length of the thickness of the fireproof panel, and the vertical surface part is joined to the upper end part of the fireproof panel,
Stopper hardware is attached to the four corner positions of the inner surface of the fireproof panel in the upper structure,
Gasket or heated foam rubber is provided on at least one of the lower surface of the upper structure or the upper surface of the fireproof panel, the upper surface of the fireproof member such as a fireproof board or the lower surface of the fireproof panel, and the small openings between adjacent fireproof panels. A fireproof covering structure for a seismic isolation device.   2. The fireproof covering structure for a seismic isolation device according to claim 1, wherein two fireproof panels adjacent to each other at right angles across the stopper metal are connected to each other by a restoring member such as a spring.   The seismic isolation system according to claim 1, wherein a horizontal member such as an L-shaped metal piece is provided at a lower end portion of an inner side surface of the fireproof panel, and a heated foam rubber is provided on a lower surface of the horizontal member. Equipment fireproof coating structure.

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