JP2013234485A - Foot member and base-isolated double floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base-isolated double floor which has a sufficient base-isolation effect, which can be inexpensively constructed, and which can sufficiently secure horizontality of an upper floor.SOLUTION: An upper floor is supported by a base part, a support which is erected from the base part, a foot member which has a receiving plate horizontally supported on an upper part of the support, which has a sphere rotatably provided on an upper surface of the receiving plate and which makes the upper floor slidable with respect to the foot member by supporting an undersurface of the upper floor by the top of the sphere, and a base isolation device in which upside and downside members each having a curved concave part provided on an inner surface vertically face each other in the state of having an interval by making a tablet-shaped rolling member fitted into the concave part. Thus, the above problem is solved.

Description

  The present invention relates to a foot member that is installed on a lower floor such as a concrete slab of a building and supports the upper floor, and a seismic isolation double floor using the foot member.

The seismic isolation double floor which reduces the shaking at the time of an earthquake is disclosed by the following patent documents 1, 2.
In the following Patent Document 1, a pedestal, a fluororesin plate, and a stainless steel plate are sequentially placed on a lower floor, a frame is formed of grooved steel or the like thereon, and the upper floor is constructed thereon. Since the fluororesin plate and the stainless steel plate slide during an earthquake, the rolling of the frame and the upper floor is reduced relative to the rolling of the lower floor.

  In Patent Document 2 below, a large number of spheres that are elastically deformed are placed on the lower floor, and the upper floor is constructed thereon. Since the outer circumference of the upper floor is connected to the wall by an elastic spring, the upper floor slides against the lower floor during an earthquake, reducing shaking.

  Further, in Patent Document 3 below, a seismic isolation device that is interposed between a structure and a base member and protects a structure from an earthquake, and an upper member and a lower member having a curved concave portion on the inner surface are disposed in the concave portion. A tablet-shaped rolling member is inserted in the above and is opposed to each other with a gap.

JP-A-5-18098 JP 2004-316420 A JP 2006-283959 A

  Since the double floor of Patent Document 1 has a large sliding resistance between the fluororesin plate and the stainless steel plate, a sufficient seismic isolation effect cannot be expected, and the upper floor is formed on a frame such as a grooved steel, The height of the upper floor becomes higher and the cost becomes higher.

  The double floor disclosed in Patent Document 2 has a fatal defect that the upper floor sinks due to a load, and the horizontality of the upper floor surface cannot be secured because the upper floor is provided on a sphere that is elastically deformed.

  The present invention provides a seismic isolation double floor that has a sufficient seismic isolation effect, can be constructed at low cost, and can ensure sufficient horizontality of the upper floor, and a foot member that can easily construct this seismic isolation double floor. Is an issue.

[Claim 1]
The present invention is a double floor foot member that is installed on the lower floor and supports the upper floor,
It has a base part, a support column erected from the support part, and a receiving plate supported horizontally on the upper part of the support element.
The foot member is characterized in that a spherical body is rotatably mounted on the upper surface of the receiving plate, and the upper floor is slidable with respect to the foot member by supporting the lower surface of the upper floor at the top of the spherical body.

At the time of an earthquake, the upper floor slides horizontally on the sphere, and the sphere rotates at this time. Therefore, the sliding resistance of the upper floor is small, and a sufficient seismic isolation effect can be obtained. Since the sphere can be made of a material that hardly deforms, such as metal or hard resin, the level of the upper floor can be sufficiently secured. Since the conventional foot member may be modified to be equipped with a sphere, it can be manufactured at low cost.
The number of spheres may be one or more.

[Claim 2]
Moreover, this invention is a leg member of Claim 1 which has a convex part or a recessed part which restrict | limits the movement of the said spherical body on the upper surface of the said receiving plate.

  Since the position of the sphere can be limited by the convex portion or the concave portion, the sphere can be held at a predetermined position on the receiving plate, and the upper floor can be supported in a balanced manner.

[Claim 3]
Also, the present invention is a double floor foot member that is installed on the lower floor and supports the upper floor,
It has a base part, a support column erected from the support part, and a receiving plate supported horizontally on the upper part of the support element.
The foot member is characterized in that a sphere is rotatably mounted on the bottom surface of the base portion, and the foot member can slide on the lower floor when the lower end of the sphere contacts the lower floor surface.

The sphere can be mounted on the bottom surface of the base portion instead of the top surface of the receiving plate. At the time of the earthquake, the upper floor and the foot members slide on the lower floor, and the sphere rotates at this time. Therefore, the sliding resistance of the upper floor is small, and a sufficient seismic isolation effect can be obtained. Since the sphere can be made of a material that hardly deforms, such as metal or hard resin, the level of the upper floor can be sufficiently secured. Since the conventional foot member may be modified to be equipped with a sphere, it can be manufactured at low cost.
The number of spheres may be one or more.

[Claim 4]
Moreover, this invention is a leg member of Claim 3 which has a convex part or a recessed part which restrict | limits the movement of the said spherical body in the bottom face of the said base part.

  Since the position of the sphere can be limited by the convex portion or the concave portion, the sphere can be held at a predetermined position on the bottom surface of the base portion, and the foot member is supported on the lower floor in a balanced manner.

[Claim 5]
Moreover, this invention is a foot member of Claim 3 or 4 with which the bottom face of the said base part is covered with the cover which prevents the fall of the said spherical body.

  Since the sphere does not fall from the foot member by the cover, the work of placing the foot member on the lower floor can be easily performed.

[Claim 6]
The present invention also includes any one of the foot members according to claims 1 to 5,
A seismic isolation device having an upper member and a lower member each having a curved concave portion on the inner surface and facing the upper and lower sides with a gap by inserting a tablet-shaped rolling member in the concave portion, as appropriate. The seismic isolation double floor is characterized by being arranged on the lower floor at intervals and supporting the upper floor with the foot members and the seismic isolation device so that the upper floor slides relative to the lower floor during an earthquake.

Although the seismic isolation device is expensive, the seismic isolation double floor can be manufactured at a relatively low cost by using it together with the foot member of the present invention. The foot member of the present invention transmits a vertical load to the lower floor and not a horizontal load, but the seismic isolation device transmits the vertical load and the horizontal load to the lower floor to attenuate the vibration.
Note that the tablet shape is a disk shape in which the upper and lower surfaces of the center swell.

[Claim 7]
Moreover, this invention is a seismic isolation double floor | bed of Claim 6 whose number of the said leg members is 5 times or more of the number of the said seismic isolation apparatuses.

  The number of leg members of the present invention can be about 5 to 15 times the number of seismic isolation devices.

[Claim 8]
Moreover, this invention forms the non-slidable outer peripheral floor of arbitrary width along the inner periphery of a wall, The seismic isolation double floor of Claim 6 or 7 of the same height as this outer peripheral floor is used. A double floor structure formed inside with a predetermined interval and covered with a slide plate between the seismic isolation double floor and the outer peripheral floor, the slide plate being fixed to the seismic isolation double floor, The double floor structure is characterized in that the inner peripheral portion of the outer peripheral floor is covered and the seismic isolation double floor and the slide plate slide relative to the outer peripheral floor at the time of an earthquake.

  Since the slide plate slides integrally with the upper floor at the time of an earthquake, an object can be placed on the upper floor and the slide plate, and the range in which the object can be placed becomes very wide. The only place where objects cannot be placed is on the perimeter floor that is not covered by the slide plate.

The seismic isolation double floor of the present invention has a sufficient seismic isolation effect, can be constructed at low cost, and can sufficiently secure the horizontality of the upper floor.
The double floor structure of the present invention has a sufficient seismic isolation effect, can be constructed at low cost, can sufficiently secure the horizontality of the upper floor, and has a very wide range where objects can be placed.
According to the foot member of the present invention, the seismic isolation double floor and the double floor structure of the present invention can be easily constructed.

It is a top view and AA sectional view of a leg member of an embodiment. It is a top view and BB sectional view of a leg member of other embodiments. It is a top view of the leg member of other embodiments. It is the bottom view and CC sectional drawing of the leg member of other embodiment. It is the top view and center longitudinal cross-sectional view of a seismic isolation apparatus. It is explanatory drawing of the double floor structure of embodiment. It is sectional drawing of the double floor structure of embodiment. It is sectional drawing of the outer periphery floor | bed in FIG. It is sectional drawing of the double floor structure of other embodiment. It is explanatory drawing of the double floor structure of other embodiment. It is sectional drawing of the double floor structure of FIG.

FIG. 1 is a top view (upper stage) and AA cross-sectional view (lower stage) of a foot member 1 according to an embodiment of the present invention.
In FIG. 1, the foot member 1 includes a plate-like pedestal 10, a support 11 standing from the support 10, and a receiving plate 12 that is supported horizontally on the support 11. The base part 10 and the lower part of the support | pillar 11 are couple | bonded and integrated by arbitrary means, such as adhesion | attachment, welding, screwing, and fitting. A nut portion 12c is suspended from the lower surface of the receiving plate 12, and a column 11 (having a thread on the outer periphery) is screwed to the nut portion 12c, so that the height can be adjusted. Reference numeral 13 denotes a locking nut.

  The upper surface of the receiving plate 12 is equipped with four spheres 14 for rotation. On the upper surface of the receiving plate 12, an outer peripheral convex portion 12 a and a central convex portion 12 b are formed to protrude, thereby restricting the movement of the four spheres 14, and the spheres remain in a predetermined position. As will be described later, by supporting the lower surface of the upper floor with the top of the sphere 14, the upper floor can slide with respect to the foot member.

  The foot member 1 shown in FIG. 1 is obtained by remodeling a well-known pedestal for a double floor so that a sphere 14 can be mounted.

FIG. 2 is a top view (upper stage) and a BB cross-sectional view (lower stage) of a foot member 1 according to another embodiment of the present invention.
The foot member shown in the figure has the same structure as the foot member shown in FIG. 1 except that four concave portions 12d are formed instead of the central protrusion 12b of the foot member shown in FIG. The movement of the four spheres 14 is restricted by the outer peripheral convex portion 12a and the concave portion 12d, and the sphere remains in a predetermined position.

FIG. 3 is a top view of a foot member 1 according to another embodiment of the present invention. 1 except that the base 10 is circular, the receiving plate 12 is formed in a substantially triangular shape, and the number of the spheres 14 is three.
In this way, the number of spheres, the planar shape of the platform and the receiving plate can be arbitrarily changed.

FIG. 4: is the bottom view (upper stage) and CC sectional drawing (lower stage) of the foot member 1 of other embodiment of this invention.
In FIG. 1, the foot member 1 includes a substantially plate-like base portion 10, a support column 11 erected from the support portion 10, and a receiving plate 12 supported horizontally on the upper portion of the support column 11. The base part 10 and the lower part of the support | pillar 11 are couple | bonded and integrated by arbitrary means, such as adhesion | attachment, welding, screwing, and fitting. A nut portion 12c is suspended from the lower surface of the receiving plate 12, and a column 11 (having a thread on the outer periphery) is screwed to the nut portion 12c, so that the height can be adjusted. Reference numeral 13 denotes a locking nut.

  The bottom surface of the base portion 10 is equipped with four spheres 14 so as to be rotatable. On the bottom of the base portion 10, an outer peripheral convex portion 10a is formed so as to protrude, and further four concave portions 10 are formed. This restricts the movement of the four spherical bodies 14, and the spherical body remains in a predetermined position. Further, a cover 15 is fitted into the base 10, and the bottom surface is covered with the cover 15 so as to prevent the sphere 14 from falling. The cover 15 has four round holes 15a, and the lower part of the sphere 14 is exposed from these holes. As will be described later, when the lower end of the sphere 14 is in contact with the lower floor surface, the foot member can slide on the lower floor.

  The foot member 1 shown in FIG. 4 is obtained by modifying a base part of a conventionally known foot member for an OA floor so that a sphere 14 can be mounted.

FIG. 5 is a top view (upper stage) and a central longitudinal sectional view (lower stage) of a conventionally known seismic isolation device 2.
The seismic isolation device 2 includes a plate-like upper member 21, a lower member 22, and a tablet-shaped rolling member 23. Curved recesses 21a and 22a are formed on the inner surface (lower surface) of the upper member 21 and the inner surface (upper surface) of the lower member. The upper member 21 and the lower member 22 are opposed to each other with a gap therebetween by inserting a tablet-shaped rolling member 23 in the curved concave portions 21a and 22a.

6-8 is explanatory drawing of the double floor structure of embodiment of this invention.
In this double floor structure, the foot member 1 (FIGS. 1 to 3) of the present invention and the seismic isolation device 2 (FIG. 5) are arranged on the lower floor at appropriate intervals, and the upper floor is supported by the foot member and the seismic isolation device. By doing so, it has a seismic isolation double floor where the upper floor slides relative to the lower floor during an earthquake. It is appropriate that the distance between the foot members 1 is 300 to 600 mm and the distance between the seismic isolation devices is about 2 to 3 m.

  The foot member 1 can be any one of FIGS. The upper floor 4 is obtained by constructing an arbitrary finishing material 43 on the base material 40. When the base material 40 is a soft material, it is desirable to stick a metal plate 41 (FIG. 7) such as a thin iron plate on the lower surface in contact with the foot member 1. In the present embodiment, the base material 40 is a particle board of 900 mm × 1800 mm.

  FIG. 6 is an explanatory diagram of a double floor structure constructed in a room surrounded by a wall 7 and shows the allocation of the base material 40 and the arrangement of the foot member 1 and the seismic isolation device 2. A circle mark indicates the position of the foot member 1 and a square mark indicates the position of the seismic isolation device 2. Each base material 40 is marked with a cross by a chain line connecting diagonally. The foot members 1 are installed at intervals of 450 mm, and the seismic isolation devices are installed at intervals of 1800 mm. The number of foot members 1 is about seven times the number of seismic isolation devices 2.

A foot member 6 is fixed on the seismic isolation device 2 as a height adjusting material. The height adjusting material may be of any structure (for example, the wood piece 60 of FIG. 9 may be used). In this case, the base part, the support column standing from the support part, and the receiving plate supported horizontally on the support part A foot member having (wood) is used, the base portion is bonded and fixed to the upper surface of the upper member of the seismic isolation device, and the receiving plate is fixed to the base material 40 with nails.
FIG. 9 shows an example in which the space under the double floor is small, and a piece of wood 60 is used as a height adjustment material on the seismic isolation device 2.

  In the seismic isolation double floor supported by the foot member 1 and the seismic isolation device 2, the upper floor 4 slides on the sphere of the foot member 1 during the earthquake, and the upper member of the seismic isolation device acts as a rolling member. Thus, since it moves in the horizontal direction with respect to the lower member, the entire upper floor 4 slides in the horizontal direction with respect to the lower floor 3, and the roll of the upper floor is reduced.

  A non-slidable outer peripheral floor 5 having an appropriate width (for example, 400 mm) is formed along the inner periphery of the wall 7. The outer perimeter floor 5 is constructed by installing a floor board (eg, particle board) on a joist 50 (glued wood) when fixed to the wall and a conventionally known foot member 51 for a double floor. Never slide.

  The seismic isolation double floor supported by the foot member 1 and the seismic isolation device 2 is formed with a predetermined interval A inside the outer peripheral floor 5. Although the height of the seismic isolation double floor and the outer peripheral floor 5 is the same, it is not necessary to be exactly the same, and the height difference may be 5 mm or less in consideration of construction errors. A space between the seismic isolation double floor and the outer peripheral floor 5 is covered with a slide plate 53. The slide plate 53 can be a plated steel plate having a thickness of 2 mm, for example. The inner part of the slide plate 53 is fixed to the seismic isolation double floor with nails or the like, and the outer part covers the inner peripheral part of the outer peripheral floor 5 with a predetermined width B. The outer peripheral part of the slide plate 53 and the wall 7 The interval is C. Since the slide plate 53 slides integrally with the seismic isolation double floor during an earthquake, objects can be placed on the seismic isolation double floor and the slide plate 53. This is a very narrow range only at the portion of the interval C where is exposed. The width in which the seismic isolation double floor is slidable during an earthquake is the smallest of the sliding amount, interval A, and interval C of the seismic isolation device 2.

  10 and 11 are explanatory views of a double floor structure according to another embodiment of the present invention. In this double floor structure, the foot members 1 (FIG. 4) of the present invention are arranged on the lower floor at intervals of 500 mm, and the seismic isolation devices 2 (FIG. 5) are arranged on the lower floor at intervals of 2000 mm. By supporting, it has a seismic isolation double floor where the upper floor slides relative to the lower floor during an earthquake. The base material is a so-called OA floor plate 42 of 500 mm square, and a finishing material 43 is applied thereon. The foot member 1 and the seismic isolation device 2 are both arranged at the corners of the OA floor board. The number of foot members 1 is about seven times the number of seismic isolation devices 2.

  In this embodiment, since the receiving plate of the foot member 1 is the same as the receiving plate of the conventionally known foot member for OA floor, it is fixed to the corner portion of the OA floor plate. A foot member 6 is fixed on the seismic isolation device 2 as a height adjusting material. The foot member 6 is a well-known foot member for an OA floor, and a receiving plate is fixed to a corner portion of the OA floor plate.

  In the seismic isolation double floor supported by the foot member 1 and the seismic isolation device 2, the foot member 1 slides on the lower floor 3 by the action of a sphere during the earthquake, and the upper member of the seismic isolation device rolls. Since the member moves in the horizontal direction with respect to the lower member, the entire upper floor 4 slides in the horizontal direction with respect to the lower floor 3, and the roll of the upper floor is reduced.

  In this embodiment, the configurations of the outer peripheral floor 5 and the slide plate 52 are the same as those in the embodiment shown in FIGS.

DESCRIPTION OF SYMBOLS 1 Foot member 10 Base part 10a Peripheral convex part 10b Concave part 11 Support | pillar 12 Support plate 12a Peripheral convex part 12b Center convex part 12c Nut part 12d Concave part 13 Loosening prevention nut 14 Sphere 15 Cover 15a Hole 2
2 Seismic isolation device 21 Upper member 21a Curved concave portion 22 Lower member 22a Curved concave portion 23 Rolling member 3 Lower floor 4 Upper floor 40 Base material 41 Metal plate 42 OA floor plate 43 Finishing material 5 Outer floor 50 50 joist 51 Foot member 52 Floor board 53 Slide plate 6 Foot member 60 Wood piece 7 Wall

Claims (8)

A double floor foot member that is installed on the lower floor and supports the upper floor,
It has a base part, a support column erected from the support part, and a receiving plate supported horizontally on the upper part of the support element.
A foot member, wherein a spherical body is rotatably mounted on the upper surface of the receiving plate, and the upper floor is slidable with respect to the foot member by supporting the lower surface of the upper floor at the top of the spherical body. The foot member according to claim 1, wherein the upper surface of the receiving plate has a convex portion or a concave portion that restricts movement of the sphere. A double floor foot member that is installed on the lower floor and supports the upper floor,
It has a base part, a support column erected from the support part, and a receiving plate supported horizontally on the upper part of the support element.
A foot member characterized in that a sphere is rotatably mounted on the bottom surface of the platform, and the lower end of the sphere is in contact with the lower floor surface so that the foot member can slide on the lower floor. The foot member according to claim 3 which has a convex part or a crevice which restricts movement of the above-mentioned spherical body in the bottom of the above-mentioned base part. The foot member according to claim 3 or 4, wherein a bottom surface of the base portion is covered with a cover that prevents the spherical body from falling. Any one of the foot members according to claim 1;
A seismic isolation device having an upper member and a lower member each having a curved concave portion on the inner surface and facing the upper and lower sides with a gap by inserting a tablet-shaped rolling member in the concave portion, as appropriate. A seismic isolation double floor characterized by being arranged on the lower floor at intervals and supporting the upper floor by the foot member and the seismic isolation device so that the upper floor slides relative to the lower floor during an earthquake. The seismic isolation double floor according to claim 6, wherein the number of the foot members is five times or more the number of the seismic isolation devices. A non-slidable outer perimeter floor having an arbitrary width is formed along the inner circumference of the wall, and the seismic isolation double floor according to claim 6 or 7 having the same height as the outer perimeter floor is disposed at a predetermined interval inside the outer perimeter floor. A double floor structure in which a space between the seismic isolation double floor and the outer peripheral floor is covered with a slide plate, the slide plate being fixed to the seismic isolation double floor, and the inner periphery of the outer peripheral floor A double floor structure characterized in that the seismic isolation double floor and the slide plate slide relative to the outer floor during an earthquake.

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