JP2006249680A - Base isolation floor structure and method of constructing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base isolation floor structure which is simple, does not produce dust during construction, and contributes to drastic reduction of labor of the construction, and to provide a method of constructing the base isolation floor structure. <P>SOLUTION: According to the base isolation floor structure, a plaster base mount 4 which has achieved the horizontality is arranged on a building floor surface FL, and a floor plate 7 is laid on the base mount 4 via a laminated rubber body 5 and a damping alloy plate 6. Further a floor protective sheet 3 is interposed between the base mount 4 and the building floor surface FL. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a seismic isolation floor structure suitable for installing a precision processing machine, a precision measuring instrument, and the like, and a manufacturing method thereof.

Conventionally, this type of seismic isolation floor structure has been realized by construction as described below. That is, as shown in FIG. 7, the existing building floor surface FL is dug down to the ground 81 to form the pit PT (FIG. 7 (1)), and the rebar frame 82 is assembled in the pit PT (FIG. 7 (2)). )) A concrete floor 83 on which an independent precision processing machine or the like is placed, which is solidified with concrete and spaced from the building floor surface FL, is provided (FIG. 8 (1)). The space around the concrete floor 83 is filled with a vibration-absorbing rubber layer 84 (FIG. 8 (2)) for preventing vibration transmission from the building floor surface FL, a base material 85, and finished concrete 86. Patent Document 1 discloses a base-isolated floor structure in which a base-isolated floor on which precision instruments are placed is supported on a structural floor via a vertical base-isolator and a horizontal base-isolator.
JP 10-238090 A

  However, the conventional base-isolated floor structure has a problem that it takes a lot of labor and time for pit formation, concrete placement, rubber layer construction, and the like, and dust is generated during construction. Further, the seismic isolation device described in the above publication has a problem that the mechanism is complicated, such as requiring a vertical seismic isolation device and a horizontal seismic isolation device.

  Therefore, the present invention solves such problems, and an object thereof is to provide a seismic isolation floor structure that is simple in structure, does not generate dust accompanying construction, and can greatly reduce the labor of construction and a method for manufacturing the same. And

  In order to achieve the above object, in the base-isolated floor structure according to the first aspect of the present invention, a base (4) having a horizontal surface as a result of the hardening of the curable fluid material is provided on the building floor (FL). (4) A floor plate (7) made of a vibration damping material is provided on the top. As the curable fluid material, for example, gypsum slurry, silicon sealant, quick-drying concrete, epoxy resin, or the like can be used. Moreover, it is preferable that the floor board is composed of a molded body of a polymer composite material. In the seismic isolation floor structure according to the first aspect of the present invention, it is possible to reduce vibrations of precision processing machines placed on the floor board with a simple structure by simply providing the floor board on the base, and to generate dust accompanying construction. In addition, the construction work can be greatly reduced.

  In the seismic isolation floor structure according to the second aspect of the present invention, a floor protection sheet (3) is interposed between the base (4) and the building floor (FL). In this 2nd invention, damage to a building floor surface is prevented by providing a floor surface protection sheet.

  In the seismic isolation floor structure of the third aspect of the invention, the vibration absorbing material layer (5) is provided above or below the floor plate (7). The vibration absorbing material layer is preferably composed of a laminated rubber body. In the third aspect of the present invention, vibration transmission to a precision processing machine or the like placed on the floor plate is more effectively prevented by the presence of the vibration absorbing material layer.

  In the seismic isolation floor structure according to the fourth aspect of the present invention, the vibration damping material layer (6) is provided above or below the floor plate (7). The vibration damping material layer is preferably composed of a damping alloy plate. The damping alloy plate preferably has a logarithmic damping factor of vibration of 0.3 to 1.0. In the fourth aspect of the present invention, the presence of the vibration damping material layer makes it possible to more effectively reduce the vibration of a precision processing machine or the like placed on the floor board.

  In the seismic isolation floor structure manufacturing method according to the fifth aspect of the present invention, a weir frame (1) is provided surrounding a predetermined area (SA) of the building floor surface, and a curable fluid material is poured into the predetermined area (SA). The base plate (4) is cured and a floor plate (7) made of a vibration damping material is placed on the base (4). In the seismic isolation floor structure manufacturing method according to the fifth aspect of the present invention, the base isolation floor structure having the effect of the first aspect of the present invention can be realized with less work. In particular, when a self-leveling gypsum slurry, silicon sealant, or the like is used as the curable fluid material, the horizontal surface of the base can be easily obtained, so that the labor of construction is further reduced.

  In the method for manufacturing a base-isolated floor structure according to the sixth aspect of the invention, before pouring the curable fluid material, the floor protection sheet (3) is placed on the building floor (FL) in the predetermined area (SA). Lay down. In the sixth aspect of the invention, the floor surface protection sheet prevents the curable fluid material and the building floor surface from sticking, so that the building floor surface can be easily restored when the seismic isolation floor structure is no longer necessary. it can.

  In addition, the code | symbol in the said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

  As described above, according to the seismic isolation floor structure and the manufacturing method thereof of the present invention, the structure is simple, the dust accompanying the construction is not generated, and the labor of the construction can be greatly reduced.

  FIG. 1 shows an example of the seismic isolation floor structure of the present invention. In FIG. 1, a rectangular weir frame 1 (see FIG. 2) is installed on the building floor surface FL in plan view, and the outer peripheral surface of the weir frame 1 is made of rubber or the like having a certain thickness to ensure safety. Covered with cushioning material 2. On the building floor surface FL of the rectangular area SA surrounded by the weir frame 1 and on the inner peripheral surface and the upper surface of the weir frame 1, a floor surface protection sheet 3 having a constant thickness is disposed so as to cover them. And the base 4 made from a plaster is formed in the space of the weir frame covered with the sheet | seat 3, The upper surface 4a is a horizontal surface.

  A plate-shaped laminated rubber body 5 having a constant thickness is disposed on the base 4 as a vibration absorbing material layer. The laminated rubber body 5 is obtained by alternately laminating a plurality of millimeters of rubber and steel plates. On the upper surface of the laminated rubber body 5, a damping alloy plate 6 is disposed as a vibration damping material layer. On the damping alloy plate 6, there is provided a floor plate 7 having a constant thickness for placing a precision processing machine or the like. In this embodiment, the floor plate 7 is formed by forming a polymer composite material having a vibration damping function into a plate shape. It is. Here, as the damping alloy material, a twin-type damping alloy M2052 based on manganese can be used, and as the polymer composite material, Rockwell Automation Co., Ltd. which is a non-metallic polymer composite material can be used. "Anocast" (trademark) can be used.

  Such a base-isolated floor structure is manufactured by the following processes, for example. First, as shown in FIG. 2, a predetermined rectangular area SA on the building floor surface FL is surrounded by a weir frame 1 whose outer periphery is covered with a buffer material 2. Subsequently, a sheet 3 for protecting the floor surface is arranged along the upper surface of the rectangular area SA, the inner peripheral surface and the upper surface of the weir frame 1 to cover them (FIG. 3). Next, the gypsum slurry 4 ′ is poured into the dam frame space covered with the sheet 3 (FIG. 4), and the surface 4 a having the same height as the height of the dam frame 1 is leveled and hardened to form the base 4. To do. In this case, for example, when SL plaster (trade name, manufactured by Yoshino Gypsum Co., Ltd.) is used as the gypsum material, a highly accurate horizontal plane can be obtained simply by smoothing due to its self-leveling.

  On the other hand, as shown in FIG. 5, a floor plate 7 in which a polymer composite material is molded is prepared, and a damping alloy plate 6 and a laminated rubber body 5 are fixed to the lower surface of the floor plate 7 in this order by bonding or mechanical bonding. . In this embodiment, nuts 71 are embedded at three locations on the upper surface of the floor board 7, and suspension bolts 72 are screwed and fixed to these (FIG. 6). A suspension wire 73 is hung on the suspension bolt 72, and the floor material 7 in which the damping alloy plate 6 and the laminated rubber body 4 are integrated is lifted and placed on the cured base 4 as shown in FIG. In this way, the seismic isolation structure is easily realized, and the damping function by the floor plate 7 and the damping alloy plate 6 and the laminated rubber body 5 are applied to the precision processing machine or the like placed on the floor plate 7 with a horizontal surface. The anti-vibration function is effectively exhibited, and vibration transmission to precision processing machines and the like can be effectively reduced. When it is necessary to relocate the seismic isolation structure, the relocation or the like is easily completed by simply lifting the flooring 7 and placing it on the newly formed base 4. When the protective sheet 3 is laid, the base 4 is not fixed to the building floor surface FL, and therefore the base 4 can be removed without damaging the building floor surface FL.

  In addition to the polymer composite molded body, a polymer concrete material or a granite material can be used as the floor board. In the above-described embodiment, the stacking order of the vibration absorber layer and the vibration damping material layer is switched, or the vibration absorber layer and the vibration damping material layer are provided on the floor board, and a precision processing machine or the like is mounted thereon. It may be arranged. In addition, the vibration absorber layer and the vibration damping material layer do not need to be integrated with the floor board, but may be separated from each other. Further, either one or both of the vibration absorber layer and the vibration damping material layer can be omitted.

It is sectional drawing of the seismic isolation floor structure which shows one Embodiment of this invention. It is a partially broken perspective view which shows the construction process of a seismic isolation floor structure. It is sectional drawing which shows the construction process of a seismic isolation floor structure. It is sectional drawing which shows the construction process of a seismic isolation floor structure. It is a perspective view which shows the construction process of a seismic isolation floor structure. It is a perspective view which shows the construction process of a seismic isolation floor structure. It is a perspective sectional view showing the construction process of the conventional seismic isolation floor structure. It is a perspective sectional view showing the construction process of the conventional seismic isolation floor structure.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Weir frame, 3 ... Sheet, 4 ... Base, 5 ... Laminated rubber body, 6 ... Damping alloy plate, 7 ... Floor board, FL ... Building floor surface, SA ... Predetermined area | region.

Claims (9)

A base-isolated floor structure characterized in that a base having a horizontal surface as a result of hardening of a curable fluid material is provided on a building floor, and a floor plate made of a vibration damping material is provided on the base. The seismic isolation floor structure according to claim 1, wherein a floor surface protection sheet is interposed between the base and the building floor surface. The seismic isolation floor structure according to claim 1, wherein a vibration absorbing material layer is provided above or below the floor board. The seismic isolation floor structure according to any one of claims 1 to 3, wherein a vibration damping material layer is provided above or below the floor board. The seismic isolation floor structure according to any one of claims 1 to 4, wherein the floor board is formed of a polymer composite molded body. The base isolation floor structure according to any one of claims 1 to 5, wherein the vibration absorbing material layer is formed of a laminated rubber body. The base isolation floor structure according to any one of claims 1 to 6, wherein the vibration damping material layer is formed of a damping alloy plate. A dam frame is provided surrounding a predetermined area of the building floor, and a curable fluid material is poured into the predetermined area and cured to form the base, and a floor plate made of a vibration damping material is placed on the base. A method of manufacturing a base-isolated floor structure characterized by The manufacturing method of the seismic isolation floor structure of Claim 8 which laid the sheet | seat for floor-surface protection on the building floor surface of the said predetermined | prescribed area | region before pouring the said curable fluid material.

Images