JP2018135906A - Base-isolated floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base-isolated floor capable of easily disposing a connection portion to which means for moving the base-isolated floor is connected, without affecting base isolation performance.SOLUTION: A base-isolated floor 1A has a base portion 2 disposed along a top face of a supporting floor, and a connection portion 3 projecting upward from the base portion 2 and connected with moving means for moving the base-isolated floor 1A along the supporting floor. The base portion 2 has a plurality of flat plate portions 21 arranged and connected in a horizontal direction so that end portions are butted in a direction to horizontally direct their flat plate-shaped plate faces. The connection portion 3 has a pair of projecting plate portions 31 formed into the flat plate shape projecting upward from each of flat plate portions 21 adjacent to each other in the horizontal direction among the plurality of flat plate portions 21 and opposed and overlapped to each other, the flat plate portion 21 and the projecting plate portion 31 are integrally formed, and the projecting plate portion 31 is projected from the flat plate portion 21 by folding the flat plate portion 21 and the projecting plate portion 31 at a boundary part to each other.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a seismic isolation floor configured to be slidable horizontally on a support floor.

Conventionally, it has a support floor such as a structural floor of an earthquake-resistant structure and a base isolation floor configured to be slidable on the support floor. When an earthquake occurs, the base isolation floor slides on the support floor There is known a seismic isolation structure that exhibits a seismic isolation function (see, for example, Patent Document 1). Such a base isolation structure is provided with a displacement recovery mechanism for recovering the base isolation floor displaced with respect to the support floor to the original position.
The displacement restoration mechanism has, for example, a restoration spring provided on the support floor, and a wire connecting the restoration spring and the seismic isolation floor, and restores the base isolation floor to the original position by the restoring force of the restoration spring. It is configured.

For this reason, the seismic isolation floor has a flat steel plate disposed along the upper surface of the support floor, and a connecting portion attached to the steel plate and capable of connecting the linear member. The connecting portion is, for example, an L-shaped angle member made of steel, and is joined to the steel plate by welding.
In addition to the displacement recovery mechanism being connected to the connecting part, in order to forcibly move the base isolation floor when there is residual displacement in the base isolation floor, during construction or when performing maintenance, etc. Equipment such as a manual winch may be connected.

JP2013-64418A

For example, a thin steel plate of about 1.6 mm may be used as the steel plate for the base isolation floor. For this reason, when a connection part is joined to a steel plate by fillet welding, there exists a possibility that curvature and distortion may arise in a steel plate by fillet welding. Further, when the connecting portion is joined to the steel plate by spot welding, there is a possibility that a welding mark may remain on the back surface of the steel plate (surface on the side in contact with the support floor) by spot welding. If the steel plate of the base isolation floor is warped or distorted, or if a welding mark remains, smooth sliding of the base isolation floor may be hindered and affect the base isolation performance.
Moreover, the operation | work which joins a connection part to a steel plate by welding also has a problem that it takes time.

  Then, an object of this invention is to provide the seismic isolation floor which can provide easily the connection part to which the means for moving a seismic isolation floor is connected, without affecting seismic isolation performance.

  In order to achieve the above object, the seismic isolation floor according to the present invention is a seismic isolation floor configured to be slidable in a horizontal direction on the support floor, and the seismic isolation floor is disposed along the upper surface of the support floor. And a connecting portion to which a moving means for projecting upward from the base and moving the base isolation floor along the support floor is connected, and each of the bases is formed in a flat plate shape. A plurality of flat plate portions arranged and connected in a horizontal direction so that the end portions face each other in a direction in which the plate surface becomes a horizontal plane, and the connecting portion is adjacent to the horizontal direction of the plurality of flat plate portions; A pair of protruding plate portions that are formed in a flat plate shape protruding upward from each of the matching flat plate portions and overlapped with each other, and the flat plate portion and the protruding plate portion are integrally formed, and The flat plate portion and the protruding plate portion are bent at the boundary between each other. Wherein the projecting plate portion at Rukoto protrudes from said plate.

In the present invention, the pair of protruding plate portions of the connecting portion to which the moving means is connected is formed integrally with the flat plate portion of the base portion and bent. When the connecting portion is joined to the base portion by welding, there is a possibility that the base portion may be warped or distorted by welding or a welding mark may remain. On the other hand, in the present invention, since the connecting portion can be formed without welding to the base portion, there is no possibility that the base portion is warped or distorted, or a welding mark remains, and the connecting portion is free from the seismic isolation floor. It can be installed without affecting the seismic performance.
Moreover, since it can form by bending a protrusion board part with respect to a flat plate part, without welding a connection part to a base, a connection part can be easily provided in a seismic isolation floor.
In the present invention, the moving means means a displacement restoring mechanism for restoring the base isolation floor displaced with respect to the support floor to the original position, or forcibly moving the base isolation floor during construction or maintenance. It shows the means for moving the seismic isolation floor along the support floor with a device such as a manual winch.

Moreover, in the seismic isolation floor according to the present invention, the base plate has an upper flat plate portion arranged to overlap the upper side of the plurality of flat plate portions, and the upper flat plate portion has a notch through which the pair of protruding plate portions are inserted. A part may be formed.
Since the base-isolated floor has a structure in which the upper flat plate portion overlaps the upper surfaces of the plurality of flat plate portions, the strength of the base-isolated floor can be improved. Moreover, an upper side flat plate part can be easily arrange | positioned on a some flat plate part by inserting a pair of protrusion plate part in the notch part of an upper side flat plate part.

The seismic isolation floor according to the present invention is formed in a flat plate shape integral with the flat plate portion, is folded at a boundary portion with the flat plate portion and overlaps the upper flat plate portion, and the upper flat plate portion is overlapped with the flat plate portion. You may have the folding | turning board part clamped with a part.
The folded plate portion formed integrally with the flat plate portion is folded back to the upper side of the upper flat plate portion, and the upper flat plate portion is sandwiched together with the flat plate portion, thereby preventing the flat plate portion and the upper flat plate portion from being separated.

  ADVANTAGE OF THE INVENTION According to this invention, the connection part which connects the moving means for moving a base isolation floor can be easily provided, without affecting a base isolation performance.

It is a top view which shows an example of the base isolation structure which has the base isolation floor by 1st Embodiment of this invention. (A) is a plan view of the seismic isolation floor according to the first embodiment of the present invention in part A of FIG. 1, and (b) is a side view of the seismic isolation floor according to the first embodiment of the present invention in part A of FIG. is there. It is the perspective view which looked at the base isolation floor by 1st Embodiment of this invention in the A section of FIG. 1 from the downward direction. It is a figure explaining the 1st steel plate part and 2nd steel plate part of the seismic isolation floor by 1st Embodiment of this invention in A part of FIG. (A) is a plan view of a part of the seismic isolation floor according to the second embodiment of the present invention, (b) is a side view of a part of the seismic isolation floor according to the second embodiment of the present invention, and (c) is the present invention. It is a partial top view of the upper side flat plate part of the seismic isolation floor by 2nd Embodiment of this. (A) is a partial top view of the base isolation floor by 3rd Embodiment of this invention, (b) is a side view of a part of base isolation floor by 3rd Embodiment of this invention. It is a figure explaining the 1st steel plate part and 2nd steel plate part of the seismic isolation floor by 3rd Embodiment of this invention. It is a figure explaining the manufacture process of the seismic isolation floor by 3rd Embodiment of this invention.

(First embodiment)
The seismic isolation floor according to the first embodiment of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, the seismic isolation floor 1 </ b> A according to the first embodiment is configured to be slidable on a support floor 11. A displacement restoring mechanism 12 is connected to the seismic isolation floor 1A to restore the base isolation floor displaced relative to the support floor 11 to its original position. The seismic isolation floor 1A constitutes a seismic isolation structure together with the support floor 11 and the displacement restoration mechanism 12, and is configured to exhibit the seismic isolation function by sliding on the support floor 11 when an earthquake occurs. ing.

  The support floor 11 is a structural floor 111 of a seismic building. In this embodiment, a floor plate 112 is fixed to the upper surface of the structural floor 111. The floor plate 112 is a steel plate having a rectangular plate surface, and the upper surface is configured such that the seismic isolation floor 1A can slide. Of the horizontal directions, if one horizontal direction is the X direction and a horizontal direction perpendicular to the one horizontal direction is the Y direction, the floor plate 112 has an outer edge corresponding to the four rectangular sides of the plate surface. The parts are arranged in directions extending in the X direction and the Y direction.

The seismic isolation floor 1A includes a flat base portion 2 arranged along the floor plate 112, and a plurality of connecting portions 3, 3... Protruding upward from the base portion 2 and connected to the wire 121 of the displacement restoring mechanism 12. Have.
The base 2 is formed in a flat plate shape and is arranged in a direction in which the plate surface is a horizontal plane. The base portion 2 has a structure in which a plurality of flat plate portions 21, 21... Arranged in the horizontal direction are connected so as to abut each edge portion. The plurality of flat plate portions 21, 21,... Are each made of a thin plate steel plate. The plurality of flat plate portions 21, 21,... May be formed in the same shape, or may be formed in different shapes.

As shown in FIGS. 1 to 3, the plurality of connecting portions 3 are each formed in a flat plate shape, and are arranged so as to protrude from the base portion 2 so that the plate surface becomes a vertical surface.
The connecting portion 3 has a structure in which a pair of protruding plate portions 31, 31 formed in a flat plate shape are overlapped with each other. The pair of protruding plate portions 31, 31 protrude upward from the edge portions of the flat plate portions 21, 21 adjacent in the horizontal direction.
One of the flat plate portions 21, 21 adjacent in the horizontal direction is the first flat plate portion 22, the other is the second flat plate portion 23, and one of the pair of protruding plate portions 31, 31 is the first protruding plate portion 32, The other is the second protruding plate portion 33. As shown in FIG. 2, the first projecting plate portion 32 and the second projecting plate portion 33 are formed with holes 32a and 33a penetrating the plate surfaces at positions overlapping each other.

The first protruding plate portion 32 is a steel plate that is formed integrally with the first flat plate portion 22 and protrudes upward from the edge of the first flat plate portion 22. The first flat plate portion 22 and the first protruding plate portion 32 are combined to form a first steel plate portion 34.
The second protruding plate portion 33 is a steel plate that is formed integrally with the second flat plate portion 23 and protrudes upward from the edge of the second flat plate portion 23. The second flat plate portion 23 and the second protruding plate portion 33 are combined to form a second steel plate portion 35.
Below, the 1st steel plate part 34 and the 2nd steel plate part 35 shall be arranged in the Y direction so that the 1st steel plate part 34 may become one side of the Y direction of the 2nd steel plate part 35. Further, the first steel plate portion 34 is assumed.

The first flat plate portion 22 is formed in a rectangular shape in which the edge portion 22a on the other side in the Y direction extends in the X direction and the edge portion 22b on the one side in the X direction extends in the Y direction when viewed from the vertical direction. ing. The first protruding plate portion 32 protrudes upward from the vicinity of one end portion in the X direction in the edge portion 22a on the other side in the Y direction of the first flat plate portion 22.
As shown in FIG. 4, when the first steel plate portion 34 is manufactured, first, the first flat plate portion 22 and the first protruding plate portion 32 are formed in a flat plate shape arranged on the same plane. . As shown in FIGS. 2 and 3, the first steel plate portion 34 is such that the first protruding plate portion 32 is a boundary portion between the first flat plate portion 22 and the first protruding plate portion 32 with respect to the first flat plate portion 22. The first protruding plate portion 32 is formed in a shape protruding from the first flat plate portion 22 by being bent by approximately 90 ° at 34 a.

The second flat plate portion 23 is formed in a rectangular shape in which the edge portion 23a on one side in the Y direction extends in the X direction and the edge portion 23b on one side in the X direction extends in the Y direction when viewed from the vertical direction. ing. The second protruding plate portion 33 protrudes upward from the vicinity of the end portion on one side in the X direction in the edge portion 23a on the one side in the Y direction of the second flat plate portion 23.
As shown in FIG. 4, when the second steel plate portion 35 is manufactured, first, the second flat plate portion 23 and the second protruding plate portion 33 are formed in a flat plate shape arranged on the same plane. . As shown in FIGS. 2 and 3, the second steel plate portion 35 is such that the second protruding plate portion 33 is a boundary portion between the second flat plate portion 23 and the second protruding plate portion 33 with respect to the second flat plate portion 23. The second projecting plate portion 33 is formed in a shape projecting from the second flat plate portion 23 by being bent by approximately 90 ° at 35a.

  In the first steel plate portion 34 and the second steel plate portion 35, the edge portion 22a on one side in the Y direction of the first flat plate portion 22 and the edge portion 23b on the other side in the Y direction of the second flat plate portion 23 are abutted. The first projecting plate portion 32 is joined in a state where one surface in the Y direction of the first projecting plate portion 32 is in contact with the other surface in the Y direction of the second projecting plate portion 33. The 1st steel plate part 34 and the 2nd steel plate part 35 are metal tapes 24, such as an aluminum tape and a stainless steel tape, for example in the connection part of the 1st flat plate part 22 and the 2nd flat plate part 23 (refer Fig.2 (a)). May be joined by bonding. The metal tape 24 may be bonded to either the upper surface or the lower surface of the connecting portion between the first flat plate portion 22 and the second flat plate portion 23, or may be bonded to both.

Thus, when the 1st steel plate part 34 and the 2nd steel plate part 35 are joined, the 1st protrusion board part 32 and the 2nd protrusion board part 33 will overlap in a Y direction, and the hole of the 1st protrusion plate part 32 will be shown. 32a and the hole 33a of the 2nd protrusion board part 33 are arrange | positioned so that it may overlap with the Y direction.
The hole portion 32a of the first protruding plate portion 32 and the hole portion 33a of the second protruding plate portion 33 in a state where the first protruding plate portion 32 and the second protruding plate portion 33 overlap with each other in the Y direction are joined together. And A fitting for connecting the wire 121 to the wire 121 of the displacement restoring mechanism 12 or the connecting portion 3 can be inserted into the connecting hole. The wire 121 inserted through the connecting hole 36 is tightly connected to the connecting portion 3 to connect the seismic isolation floor 1A and the displacement restoring device.
In addition, in the connecting hole 36, a device such as a manual winch is used to forcibly move the seismic isolation floor 1A when a residual displacement occurs in the seismic isolation floor 1A, construction work, or maintenance. Such a wire or the like, or a fitting for connecting the wire or the like to the connecting portion 3 can be inserted. The wire inserted through the connecting hole 36 is tightly connected to the connecting portion 3 to connect the seismic isolation floor 1A and the devices.

  In the above description, the connection portion 3 is formed at the boundary portion between the flat plate portions 21 and 21 adjacent in the Y direction. However, the connection portion 3 is also appropriately provided at the boundary portion between the flat plate portions 21 and 21 adjacent in the X direction. Is formed.

Returning to FIG. 1, the plurality of displacement restoring mechanisms 12 are respectively arranged on both sides in the X direction of the floor plate 112 and the seismic isolation floor 1 </ b> A with a space in the Y direction, and the floor plate 112 and the seismic isolation floor. 1A is arranged on both sides in the Y direction with an interval in the X direction. That is, the plurality of displacement restoring mechanisms 12 are arranged on each of the four sides of the floor plate 112 and the seismic isolation floor 1A.
The displacement restoring mechanism 12 includes a spring portion 122 provided on the structural floor 111 outside the floor plate 112, and a wire 121 that connects the spring portion 122 and the seismic isolation floor 1A. The displacement restoring mechanism 12 is configured to restore the seismic isolation floor 1 </ b> A to the original position by the urging force of the spring portion 122. As described above, the wire 121 is connected to the base isolation floor 1 </ b> A by being inserted into the connection hole 36 of the base isolation floor 1 </ b> A and attached to the connection portion 3.

Next, the operation and effect of the seismic isolation floor according to the first embodiment described above will be described with reference to the drawings.
In the seismic isolation floor 1A according to the first embodiment described above, the pair of projecting plate portions 31 and 31 of the connecting portion 3 to which the moving means for moving the seismic isolation floor 1A such as the displacement restoring mechanism 12 and the manual winch are coupled are These are formed integrally with the flat plate portions 21 and 21 of the base portion 2 and bent. When the connecting part 3 is joined to the base part 2 by welding, there is a possibility that the base part 2 may be warped or distorted by welding or a welding mark may remain. On the other hand, in the present invention, since the connecting portion 3 can be formed without welding to the base portion 2, there is no possibility that the base portion 2 is warped or distorted, or a welding mark remains, and the connecting portion 3 is freed. It can be provided without affecting the seismic isolation performance of the seismic floor 1A.
Moreover, the connection part 3 can be easily provided in the seismic isolation floor 1A because it can be formed by bending the protruding plate parts 31 and 31 with respect to the flat plate parts 21 and 21 without welding the connection part 3 to the base part 2. .

(Second Embodiment)
Next, other embodiments will be described with reference to the accompanying drawings, but the same or similar members and parts as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted. A different configuration will be described.
As shown in FIG. 5, the seismic isolation floor 1B according to the second embodiment is provided with the upper flat plate portion 4 so as to overlap the base 2 similar to the seismic isolation floor 1A of the first embodiment shown in FIG. Yes. The upper flat plate part 4 is arranged in a direction in which the plate surface is a horizontal plane.
The upper flat plate portion 4 is formed of a single steel plate that overlaps the entire flat plate portions 21, 21... Constituting the base portion 2. The upper flat plate portion 4 is provided with a plurality of cutout portions 41 that penetrate in the vertical direction and open toward the side, and through which the connecting portion 3 can be inserted.

In a portion of the upper flat plate portion 4 that is disposed on the first flat plate portion 22 and the second flat plate portion 23 adjacent to each other in the Y direction, the notch 41 penetrates the upper flat plate portion 4 in the vertical direction and X Open in one direction.
The notch 41 has a length in the Y direction that is slightly longer than a length in the Y direction of the connecting portion 3, and a length in the X direction that is slightly longer than the length in the X direction of the connecting portion 3. Is formed. When the upper flat plate portion 4 is arranged so as to overlap the upper sides of the first flat plate portion 22 and the second flat plate portion 23, the connecting portion 3 is arranged in a state of being inserted through the notch portion 41.
In addition, the shape of the notch part 41 is formed in the shape corresponding to the shape of the connection part 3 penetrated.

  In the base isolation floor 1B according to the second embodiment, the base isolation floor 1B has a structure in which the upper side flat plate portion 4 overlaps the plurality of flat plate portions 21, 21, ..., thereby improving the strength of the base isolation floor 1B. Can do. Further, the upper flat plate portion 4 is easily arranged on the plurality of flat plate portions 21, 21... By inserting the pair of protruding plate portions 31, 31 (connecting portion 3) into the notch portion 41 of the upper flat plate portion 4. be able to.

(Third embodiment)
As shown in FIG. 6, in the seismic isolation floor 1 </ b> C according to the third embodiment, the upper flat plate portion 4 is provided similarly to the seismic isolation floor 1 </ b> B of the second embodiment, and the base portion 2 </ b> C is continuous with the flat plate portion 21. The folded plate portion 5 is provided.
The folded plate portion 5 provided continuously with the first flat plate portion 22 is referred to as a first folded plate portion 51, and the folded plate portion 5 provided continuously with the second flat plate portion 23 is referred to as a second folded plate portion 52. .

The first folded plate portion 51 is provided continuously to the edge portion on the one side in the X direction of the first flat plate portion 22, and is folded upward on the edge portion on the one side in the X direction of the first flat plate portion 22. And disposed above the upper flat plate portion 4 that overlaps the upper side of the first flat plate portion 22.
The first folded plate portion 51 and the first flat plate portion 22 and the first protruding plate portion 32 are integrally formed of the same steel plate. As shown in FIG. 7, the first steel plate portion 34 </ b> C of the third embodiment includes a first flat plate portion 22, a first protruding plate portion 32, and a first folded plate portion 51. The first projecting plate portion 32 has a length dimension in the Y direction set to, for example, about 40 mm.

As shown in FIG. 6, the second folded plate portion 52 is provided continuously to the edge portion on the one side in the X direction of the second flat plate portion 23, and the edge on the one side in the X direction of the second flat plate portion 23. It is disposed above the upper flat plate portion 4 that is folded upward at the boundary and overlaps the upper side of the second flat plate portion 23.
The second folded plate portion 52 is integrally formed of the same steel plate as the second flat plate portion 23 and the second protruding plate portion 33. As shown in FIG. 7, the second steel plate portion 35 </ b> C of the third embodiment includes a second flat plate portion 23, a second protruding plate portion 33, and a second folded plate portion 52. The second projecting plate portion 33 has a length dimension in the Y direction set to, for example, about 40 mm.

When the first steel plate portion 34C is manufactured, first, the first flat plate portion 22, the first protruding plate portion 32, and the first folded plate portion 51 are formed in a flat plate shape on the same plane. Similarly to the first embodiment, the first steel plate portion 34C is configured such that the first protruding plate portion 32 is bent by approximately 90 ° with respect to the first flat plate portion 22, so that the first protruding plate portion 32 and the first flat plate portion 22 are bent. It is formed in a shape protruding from.
When the second steel plate portion 35C is manufactured, first, the second flat plate portion 23, the second protruding plate portion 33, and the second folded plate portion 52 are formed in a flat plate shape arranged on the same plane. Similarly to the first embodiment, the first steel plate portion 34C is configured such that the first protruding plate portion 32 is bent by approximately 90 ° with respect to the first flat plate portion 22 so that the second protruding plate portion 33 becomes the second flat plate portion. It is formed in a shape protruding from 23.

In the third embodiment, as shown in FIG. 8, the first steel plate portion 34C in which the first protruding plate portion 32 is bent and the second steel plate portion 35C in which the second protruding plate portion 33 is bent are arranged in the Y direction. The upper flat plate portion 4 is overlapped on the first flat plate portion 22 and the second flat plate portion 23. At this time, the first protruding plate portion 32 and the second protruding plate portion 33 are inserted into the cutout portion 41 of the upper flat plate portion 4. Further, the upper flat plate portion 4 is not disposed on the first folded plate portion 51 and the second folded plate portion 52.
Then, in a state where the upper flat plate portion 4 is arranged above the first flat plate portion 22 and the second flat plate portion 23, the first folded plate portion 51 is connected to the boundary portion between the first flat plate portion 22 and the first folded plate portion 51. The first folded plate portion 51 and the second folded plate portion are folded upward at 34b and the second folded plate portion 52 is folded upward at the boundary portion 35b between the second flat plate portion 23 and the second folded plate portion 52. 52 is arranged on the upper side of the upper flat plate portion 4 and sandwiches the upper flat plate portion 4 together with the first flat plate portion 22 and the second flat plate portion 23.
The folded plate portion 5 connected to the flat plate portion 21 other than the first flat plate portion 22 and the second flat plate portion 23 is also folded in the same manner and arranged above the upper flat plate portion 4.

  According to the seismic isolation floor 1 </ b> C according to the third embodiment, the folded plate portion 5 formed integrally with the flat plate portion 21 is folded back to the upper side of the upper flat plate portion 4 and sandwiches the upper flat plate portion 4 together with the flat plate portion 21. Thus, the flat plate portion 21 and the upper flat plate portion 4 can be prevented from separating.

The tensile strength of the connection part 3 of the seismic isolation floors 1A to 1C according to the first to third embodiments was confirmed by experiments.
The seismic isolation floor 1A according to the first embodiment is fixed to the floor surface, and a tensile load of 300 kgf to 500 kgf is applied to the seismic isolation floor 1A via a wire connected to the connecting portion 3 and then unloaded. An experiment was conducted.
The following experiments were performed on the seismic isolation floors 1B and 1C according to the second and third embodiments.
First, an L-shaped steel frame having a lower steel frame extending along the floor surface and an upper steel frame extending upward from the steel frame is installed, and the seismic isolation floors 1B and 1C are fixed to the lower steel frame, Install a manual winch. The manual inch and the seismic isolation floors 1B and 1C are connected by a wire, a roller is provided below the manual winch in the vertical direction, the wire is hung, and the wire is bent by 90 ° with the roller. The wire extending from the bent portion extends in the horizontal direction so that the tensile force by the manual winch acts on the base isolation floors 1B and 1C in the horizontal direction. And the tensile load of 400 kgf-500 kgf was given to the seismic isolation floors 1B and 1C via the wire connected with the connection part 3, and it unloaded after that.

In the case where a tensile force of 300 kgf was applied to the seismic isolation floor 1A according to the first embodiment, the base portion 2 did not lift from the floor surface, and the connecting portion 3 did not deform. When a tensile force of 500 kgf is applied to the seismic isolation floor 1A according to the first embodiment, the base 2 is lifted by about 10 mm from the floor surface, the connecting portion 3 is deformed to be inclined toward the tension side, and is about 3 mm after unloading. Residual displacement occurred.
In the seismic isolation floor 1B according to the second embodiment, when a tensile force of up to 400 kgf was applied, the base 2 did not rise from the floor and the connecting part 3 did not deform.
In the seismic isolation floor 1C according to the third embodiment, even when a tensile force of 500 kgf was applied, the base portion 2 did not rise from the floor surface, and the connecting portion 3 did not deform.

  If deformation occurs in the base 2 of the base isolation floors 1A to 1C, the coefficient of friction with the floor plate 112 increases, and the base isolation floor cannot smoothly slide on the floor plate 112, which may affect the base isolation performance. . For this reason, the limit tensile load of the base isolation floor 1A according to the first embodiment is 300 kgf, the limit tensile load of the base isolation floor 1B according to the second embodiment is 400 kgf, and the limit tensile load of the base isolation floor 1C according to the third embodiment is 500 kgf. It becomes.

As described above, compared to the seismic isolation floor 1A according to the first embodiment in which the upper flat plate portion 4 is not provided, the seismic isolation floor 1B and the third embodiment according to the second embodiment in which the upper flat plate portion 4 is provided. It can be seen that the seismic isolation floor 1C increases the critical tensile load.
In addition, the seismic isolation floor 1C according to the third embodiment provided with the folded plate portion may have a larger limit tensile load than the seismic isolated floor 1B according to the second embodiment where the folded plate portion is not provided. Recognize.

As mentioned above, although embodiment of the seismic isolation floor by this invention was described, this invention is not limited to said embodiment, It can change suitably in the range which does not deviate from the meaning.
For example, in the above embodiment, the plate surfaces of the first flat plate portion 22 and the second flat plate portion 23 are formed in a rectangular shape, but the shape of the plate surfaces of the first flat plate portion 22 and the second flat plate portion 23 is appropriately set. May be set.
In the above embodiment, the displacement restoring mechanism 12 is configured to restore the base isolation floor 1A to the original position by the biasing force of the spring portion 122, but the base isolation floor 1A is biased by the biasing member other than the spring portion. May be configured to be restored to the original position.

DESCRIPTION OF SYMBOLS 1A-1C Base-isolated floor 2,2C Base part 3 Connection part 4 Upper plate part 5 Folding board part 11 Supporting floor 12 Displacement restoration mechanism (movement means)
21 flat plate portion 22 first flat plate portion 23 second flat plate portion 31 protruding plate portion 32 first protruding plate portion 33 second protruding plate portion 34a, 34b, 35a, 35b boundary portion 41 notch portion 51 first folded plate portion 52 first 2 folded plate part 121 wire

Claims (3)

In the seismic isolation floor configured to be slidable horizontally on the support floor,
The base isolation floor includes a base portion arranged along the upper surface of the support floor, and a connecting portion to which a moving means for projecting upward from the base portion and moving the base isolation floor along the support floor is connected. Have
The base portion has a plurality of flat plate portions that are formed in a flat plate shape and connected in a horizontal direction so as to abut the end portions in a direction in which the plate surface becomes a horizontal plane,
The connecting portion has a pair of protruding plate portions that are formed in a flat plate shape that protrudes upward from each of the flat plate portions adjacent in the horizontal direction among the plurality of flat plate portions and are overlapped with each other.
The flat plate portion and the protruding plate portion are integrally formed, and the protruding plate portion protrudes from the flat plate portion by bending the flat plate portion and the protruding plate portion at a boundary portion between each other. Characterized seismic isolation floor. An upper flat plate portion disposed on top of the flat plate portions;
The seismic isolation floor according to claim 1, wherein the upper flat plate portion is formed with a notch portion through which the pair of protruding plate portions are inserted.   It is formed in a flat plate shape that is integral with the flat plate portion, folded back at the boundary with the flat plate portion, overlapped on the upper side of the upper flat plate portion, and has a folded plate portion that sandwiches the upper flat plate portion with the flat plate portion. The seismic isolation floor according to claim 2, wherein

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