JP2014005711A - Base isolation floor restoration method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation floor restoration method, for a base isolation floor having a totally thinned base isolation structure to enable an effective space inside a building to be efficiently utilized, which restores the base isolation floor, even when seismic movement causes the same to have displacement such as positional misalignment, by easily putting the same back into place after an earthquake.SOLUTION: For a base isolation floor which has: a plate base 11 with a plurality of upward convex curve sections arranged thereon; and a glide plate 21 placed on the plate base together with floor materials integrally fixed on the glide plate 21, a base isolation floor restoration method includes a restoration process to put the glide plate 21 and the floor materials back in place when an earthquake causes the same to move.

Description

  The present invention provides a seismic isolation floor that is suitably installed in order to effectively exhibit the seismic isolation function even in the case of displacement after a large-scale vibration occurs due to an earthquake inside a building or civil structure. It relates to the restoration method.

  For example, as shown in Patent Document 1, a plurality of ball bearings are fixed to a frame so that the frame can be freely moved on the floor slab. A seismic isolation floor is proposed. In the disclosed technique of this patent document 1, the ball bearing is arranged especially in the lower part of the metal pipe, so that even if an earthquake load is applied, the rolling friction resistance of the ball bearing is small, so that the seismic isolation floor has almost no vibration. After the earthquake is over, it returns to the origin by using a coil spring or the like.

  In addition, as shown in Patent Document 2, an upper plate and a lower plate provided with a rail-like groove having a maximum depth at a plurality of centers are installed between a floor material and precision equipment, and balls in the groove are placed. A base-isolated floor has been proposed in which the upper plate can be moved freely on the lower plate by rotating. In the disclosed technology of this patent document 2, even if an earthquake load is applied, the rolling frictional resistance of the ball in the groove is small, so that vibrations are hardly transmitted to precision instruments on the upper plate, and the origin is reached after the end of the earthquake. I'm back.

JP 10-317658 A JP 2010-127455 A

  However, the seismic isolation floor shown in Patent Document 1 has a structure in which a bearing is attached to a square pipe using bolts and nuts so that a restoring function such as a coil spring can be attached. For this reason, the seismic isolation floor shown in Patent Document 1 becomes thicker as a whole due to the thickness of the square pipe, and the floor surface becomes higher. If the floor surface becomes higher than necessary, there is a problem that the effective space inside the building or the like becomes narrow accordingly.

  Moreover, the seismic isolation floor shown by patent document 2 is installed between a flooring and a precision instrument. And since the rail-shaped groove | channel which becomes the maximum depth in the center is included, the whole seismic isolation structure is thick. For this reason, when installing this base isolation floor for existing precision equipment, etc., temporarily remove the precision equipment etc., move it to another location, install this base isolation floor, and then remove this base It is necessary to install precision equipment and the like in their original positions again. For this reason, there also existed a problem that the increase of the burden of installation labor and the increase of installation cost were caused.

  In addition, the seismic isolation floor shown in Patent Document 2 causes the ball and the end of the groove to collide when the upper plate moves due to unexpected large earthquake motion until the position of the ball reaches the end of the groove. As a result, the movement of the upper plate suddenly stops at the end of the groove, and there is a problem that the precision instrument or the like on the upper plate may fall over due to the action of inertia.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to effectively make an effective space inside a building or the like by making the entire base-isolated structure thin. A method of restoring a seismic isolation floor that can be utilized and can be easily restored to its original position and restored even when the seismic isolation floor itself is displaced due to seismic motion. Is to provide.

  In order to solve the above-described problems, in the present invention, a flat base having a plurality of upward convex curved portions aligned on the upper surface, and a flat planing board installed on the base When the flooring is integrally attached on the sliding board in the base-isolated floor and the sliding board and the flooring are moved on the base by earthquake motion, these are returned to their original positions after the earthquake. It has the restoration process which returns to (1).

  According to the present invention having the above-described configuration, it is a seismic isolation floor that can effectively use an effective space inside a building or the like by thinly configuring the entire seismic isolation structure, and the seismic isolation floor itself by seismic motion. Even when displacement such as displacement occurs, it is possible to easily restore the original position and restore it after the earthquake.

It is the basic schematic of the installation method of the seismic isolation floor to which this invention is applied. (A) is the side view which looked at the seismic isolation floor from the side, (b) is the top view which looked at the base from the upper part, (c) is the top view which looked at the sliding board from the upper part It is. It is a figure for demonstrating the arrangement position of a convex curve part. It is an enlarged view which shows the contact part of the upper surface part of a base, and the lower surface part of a sliding board. It is a figure for demonstrating the detail of a convex curve part. It is a figure which shows the example which formed the intermittent slit along the circumferential direction of a convex curve part. It is sectional drawing which looked at the concave curved surface part or the through-hole from the side. It is a figure for demonstrating the example of installation of a protection sheet. It is a side view which shows the detailed structure at the time of installing a sliding board. It is a figure for demonstrating the example which forms an OA floor. It is a figure for demonstrating the other example of installation of the seismic isolation floor which concerns on this invention. It is a figure for demonstrating the restoration process in the case of using a protection sheet. It is a figure which shows the other form of the decompression | restoration process in the case of using the protective sheet as a flooring. It is a top view for demonstrating the decompression | restoration process in the case of using the flooring which has a floor panel supported by the upper end of a leg part. It is a sectional side view for demonstrating the decompression | restoration process at the time of using the flooring which has a floor panel supported by the upper end of a leg part. It is another sectional side view for demonstrating the decompression | restoration process in the case of using the flooring which has a floor panel supported by the upper end of a leg part. It is a top view for demonstrating the decompression | restoration process in the case of using the flooring which has a floor panel supported by the upper end of a leg part. It is a bird's-eye view of the seismic isolation area | region in the case of attaching a shape steel on a base and a cloth foundation, and a displacement correction area. It is a sectional side view for demonstrating the decompression | restoration process at the time of using the flooring which has a floor panel supported by the upper end of a leg part. (A) is a top view in the case of using a concrete board as a flooring, (b) is the AA 'sectional drawing. (A) is a top view which shows the example which comprised the opening so that it might become substantially circular shape, (b) is the BB 'sectional drawing. It is a figure which shows the example of the restoration | restoration process of the flooring which has a concrete board in which at least 2 or more rectangular bay parts were provided in each edge | side.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out a seismic isolation floor restoration method to which the present invention is applied will be described in detail with reference to the drawings.

  As shown in FIG. 1, when the seismic isolation floor 7 installed on the upper surface 1a of the floor 1 is displaced due to a seismic motion or the like, as shown in FIG. Is returned to the original position.

  Fig.2 (a) is the side view which looked at this seismic isolation floor 7 from the side. As shown in FIG. 2A, the seismic isolation floor 7 includes a base 11 that is installed on a substantially flat surface and a sliding plate 21 that is installed on the base 11. FIG. 2B shows a plan view of the base 11 as viewed from above. The base 11 is formed in a substantially square flat plate with four corners chamfered to ensure play with installation accuracy, and a plurality of convex curved surface portions 12 are regularly arranged on the upper surface portion 11a on the sliding plate 21 side. Is done. The base 11 is configured to have a length of about 500 mm and a thickness of about 1.5 mm on four sides of the substantially square, but is not limited thereto, and may be configured in any size. The base 11 is made of metal and is preferably made of stainless steel, but is not limited to this, and may be made of any material such as glass or resin. Incidentally, the base 11 may be coated with a film having predetermined physical properties in order to control the friction coefficient or to prevent corrosion. Further, the adjustment of the coefficient of friction of the surface of the base 11 may be performed by covering a hard material such as metal or ceramic on the surface layer of at least the convex curved surface portion 12, or by surface hardening such as carburizing treatment or boriding treatment. Of course, it may be realized by controlling the surface roughness by performing additional processing.

  The interval t between the top portions 12a of the adjacent convex curved surface portions 12 may be about 25 mm. In the present invention, the interval t is desirably 5 mm to 100 mm. This interval t is an interval necessary for removing dust and dust, an appropriate interval when manufacturing by press molding, or an interval determined from an allowable load. Moreover, as shown in FIG.2 (b), although it is desirable for the convex curve part 12 to be comprised so that it may become substantially circular shape, it is not limited to this. The convex curved surface portions 12 may be regularly aligned vertically and horizontally in a plan view, but is not limited to this, and is formed in a staggered manner as shown in FIG. May be. Further, the convex curved surface portion 12 can be irregularly formed as shown in FIG. 3B, or the convex curved surface portions 12 having different sizes can be regularly formed as shown in FIG. 3C. It can also be formed in an array.

  FIG.2 (c) is the top view which looked at the sliding board 21 from upper direction. The sliding board 21 is formed in a substantially square flat plate with four corners chamfered. The length of the substantially square four sides of the planing plate 21 is about 500 mm, and the thickness is about 1.6 mm. The sliding board 21 which concerns on this invention is not limited to this, It may be comprised by the size larger than the base 11, and may be comprised by what size. The sliding plate 21 may be made of metal, glass, resin, or the like, and stainless steel may be used only for the surface layer.

  FIG. 4A is an enlarged view showing a contact portion between the upper surface portion 11 a of the base 11 and the lower surface portion 21 b of the sliding plate 21. The sliding plate 21 does not form the concave curved surface portion 22 or the through-hole 22a, and the lower surface portion 21b is substantially flat, and the lubricant is applied to the sliding portion 23 other than the contact portion with the convex curved surface portion 12. Can do. Such lubricants are typified by grease, tetrafluoroethylene resin, and silicon resin, which makes it possible to reduce the coefficient of friction and improve the slipperiness. As this lubricant, a material mixed with a powder having a particle diameter of 1 μm to 50 μm such as diamond may be used, or a material having a viscosity of 100 cst or more such as silicon oil, grease, heavy oil, wax, or the like may be used. .

  Further, as shown in FIG. 4 (b), the sliding plate 21 has a high friction portion 22b having a large friction coefficient by making the lower surface portion 21b substantially flat and sandblasting the contact portion with the convex curved surface portion 12. It is also possible to form and apply the above-mentioned lubricant to the sliding portion 23. As shown in FIG. 4B, the sliding portion 23 may be coated with a lubricant (not shown) such as grease, tetrafluoroethylene resin, or silicon resin. That is, in the form of FIG. 4B, the high friction portion 22b having a large friction coefficient is just in contact with the convex curved surface portion 12, and the lubricant having a small friction coefficient is in contact with the convex curved surface portion 12. It is also possible to freely adjust both the resistance force up to the start of sliding by the sliding plate 21 and the slipperiness after the start of sliding. As a result, an ideal seismic isolation device that does not move easily even if it is accidentally pressed by an operator in a normal state, and moves smoothly and exhibits seismic isolation performance if a large earthquake occurs and shifts the contact position. Can be created.

  Moreover, as shown in FIG.4 (c), the base 11 may be able to contact | abut the base 11 from the lower side via the lower surface part 21b. Specifically, a plurality of concave curved surface portions 22 are regularly arranged on the lower surface portion 21b. That is, the arrangement position of the concave curved surface portion 22 corresponds to the arrangement position of the convex curved surface portion 12 in a plan view, and the convex curved surface portion 12 on the base 11 is provided by installing the sliding plate 21 on the base 11. The concave curved surface portion 22 is provided on the top. The sliding plate 21 is not limited to this, and instead of the concave curved surface portion 22, as shown in FIG. 4D, the through holes 22 a are formed corresponding to the arrangement positions of the convex curved surface portions 12 in plan view. It may be.

FIG. 5A is a cross-sectional view of the convex curved surface portion 12 as viewed from the side in this embodiment. FIG. 5B is a plan view of the convex curved surface portion 12 as viewed from above in the present embodiment. In the present embodiment, as shown in FIG. 5A, the convex curved surface portion 12 has a diameter d _{12 in} plan view of the convex curved surface of about 10 mm, a radius of curvature r of the top portion 12a of about 30 mm, and a height H of about 10 mm. It is formed by pressing or the like so as to be 1.0 mm. Although there is no particular limitation on the curvature constituting the convex curved surface portion 12, particularly the top surface is adjusted so that the curvature becomes gentle, thereby increasing the contact area with the concave curved surface portion 22 and improving the slipperiness. Improvement may be made. Not only this but as shown in FIG.5 (c), (d), the substantially circular protruding part 12b may be formed in the concentric outer side of the convex-curved surface part 12 in planar view. By providing the raised portion 12b, flexibility (spring property) is provided in the vertical direction so as to absorb unevenness of the floor surface (poor planar accuracy). Further, as shown in FIGS. 6A and 6B, the convex curved surface portion 12 may be formed with intermittent slits 12 c along the circumferential direction in the plan view of the convex curved surface portion 12. The slit 12c may be penetrated, and may be comprised by the non-penetrating groove | channel. By providing the slits 12c, it is possible to release internal stress when a large number of convex curved surface portions 12 are press-molded on a single steel sheet, and it is possible to ensure the planar accuracy of the steel sheet.

Fig.7 (a) is sectional drawing which looked at the concave curved surface part 22 from the side in a present Example. Further, the concave curved surface portion 22 shown in FIG. 4 (c) desirably has the same radius of curvature as the top portion 12a of the convex curved surface portion 12, as shown in FIG. 7 (a), but is not limited thereto. It may be a radius of curvature greater than that. Further, the depth h ₂₂ of the concave curved surface portion ₂₂ is formed by pressing or the like so as to be shallower than the height H of the top portion 12a of the convex curved surface portion 12 and to have a depth of 0.05 mm to 0.50 mm. The diameter d ₂₂ of the concave curved surface portion ₂₂ is set to be larger than the diameter d ₁₂ of the convex curved surface portion 12 so that the top portion 12a of the convex curved surface portion 12 can come into contact with the inside of the concave curved surface portion 22. desirable.

FIG.7 (b) is sectional drawing which looked at the through-hole 22a from the side in another Example. Through holes 22a shown in FIG. 4 (d), using the male die such as a punch, so that only the top portion 12a of the convex curved portion 12 is fitted, the diameter d ₁₂ of the convex curved surface portion 12 and the diameter d _22a Shorter than that. By the way, if the convex curved surface portion 12 is configured with a substantially circular plane, the through hole 22a can be fitted in a stable state by being configured with a substantially circular plane corresponding thereto. Is possible.

  In addition, the floor material demonstrated how is attached integrally on a sliding board. As shown in FIGS. 8A and 8B, the protection sheet 2 as a flooring is installed on a sliding plate 21 as a flooring so as to cover the seismic isolation floor 7. The protective sheet 2 may be attached to the sliding plate 21 by an adhesive portion 83 made of, for example, a thermosetting resin such as epoxy or other elastic material. Thereby, the protection sheet 2 can be installed integrally with the sliding board 21, and the workability in installing the sliding board 21 and the protection sheet 2 can be improved. In addition, the protective sheet 2 is installed in a larger area than the seismic isolation floor 7 so that the base 11 and the sliding plate 21 are completely covered with the protective sheet 2 so as not to be directly exposed to the outside. Thus, it is possible to prevent dust from entering between the base 11 and the sliding plate 21 and to improve the durability of the seismic isolation floor 7.

In addition, as shown in FIG. 9, the thickness H of the base 11 is 1.5 mm, the thickness h ₂₁ of the sliding board ₂₁ is 1.6 mm, and the protective sheet 2 has the thickness of the seismic isolation floor 7. the thickness h ₂ from it is about 2.0 mm, becomes 5.0mm as thin as about a total of.

  The seismic isolation floor 7 according to the present invention is attached to a floor material having a plurality of leg portions 92 and a floor panel 93 supported by the upper ends of the leg portions 92, for example, as shown in FIG. Also good. In such a case, the leg 92 can be installed on the top of the sliding plate 21 in the base isolation floor 7, and the gap 91 can be provided between the base isolation floor 7 and the floor panel 93. In a place where a precision machine that needs to be prevented from falling, such as a server, is installed, the seismic isolation floor 7 according to the present invention is particularly effective as a seismic isolation device.

  The seismic isolation floor 7 according to the present invention can be installed not only on the entire floor 1 but also on the bottom of a specific facility 4 as shown in FIG. Thereby, compared with the case where the seismic isolation floor 7 which concerns on this invention is installed in the whole floor 1, the cost required for the installation can be suppressed. Moreover, in the equipment 4 having the foot portion 4b, as shown in FIG. 11 (a), a thick plate 72 made of concrete, steel, wood or the like as a flooring is provided between the sliding plate 21 and the foot portion 4b. It can also be arranged. As a result, as shown in FIG. 11B, the center of gravity of the equipment 4 through the thick plate 72 can be as high as possible on the base 11, and the equipment 4 together with the sliding board 21 can be placed on the base 11. If it is above (within the range), the sliding plate 21 can exhibit the seismic isolation function without falling off the base 11.

  Next, when the sliding board 21 and the flooring are moved on the base 11 due to the earthquake motion, a restoration process for returning them to their original positions after the end of the earthquake will be described.

  First, in the restoration process when the protective sheet 2 as a flooring material is used, for example, as shown in FIG. 12, first, a notch 44 is introduced at one end 2a of the protective sheet 2. Here, the one end 2a of the protective sheet 2 indicates an end portion for applying a tensile force to return to the original position. For example, when the protective sheet 2 and the sliding plate 21 shown in FIG. 9 are displaced from the base 11 to the right side of the drawing due to an earthquake, it is necessary to return them to the original positions by pulling them to the left side of the drawing. In such a case, the left end of the protective sheet 2 corresponds to the one end 2a. By pulling the left end (one end 2a) of the protective sheet 2 toward the wall 9d, it can be returned to the original position.

  When the cut 44 is made, it is introduced by using various cutting tools such as scissors and a cutter at a predetermined interval so that a protruding piece 43 having a predetermined width is formed. The cut 44 is assumed to be substantially perpendicular to the direction of the side of the one end 2a, but is not limited thereto. However, the cuts 44 need to be parallel to each other so that the width of each protruding piece 43 does not become wider as the distance from the one end 2a increases. A plurality of projecting pieces 43 are formed at one end 1a after the introduction of the slits 44.

  Next, the winding member 40 is brought close to the protective sheet 2. A plurality of insertion holes 41 are formed in the winding member 40. The winding members 40a and 40b are formed of a tubular body, and the winding member 40c is formed of a plate body. The winding member 40 is extended in the longitudinal direction. The winding member 40 is provided with a plurality of insertion holes 41 at intervals in the longitudinal direction. The widths of the insertion holes 41 are adjusted in advance so as to be equal to or larger than the width of the protruding piece 43.

  The protruding piece 43 is inserted into the insertion hole 41 in such a winding member 40. Each of the plurality of protruding pieces 43 is inserted into a plurality of insertion holes 41 provided in the winding member 40. Next, the winding member 40 is rotated with the protruding piece inserted into the insertion hole. As a result, the protruding piece 43 of the protective sheet 2 is entangled with the winding member 40, and as a result, the protective sheet 2 is attached to the winding member 40 via the protruding piece 43.

  Next, the winding member 40 to which the protective sheet 2 is attached is pulled in the direction of the arrow in the figure. As a result, it becomes possible to pull the protective sheet 2 by the winding member 40 without stress concentration. In particular, since the winding member 40 is extended in the longitudinal direction, when pulling the winding member 40, the center of the winding member 40 in the longitudinal direction may be gripped and pulled. Further, from the viewpoint of reducing the amount of bending when pulling the winding member 40, when pulling the winding member 40 b configured as an elliptical tube body or the winding member 40 c formed of a plate, the cross section You may make it adjust so that the strong axis direction may become the tension | pulling direction of the arrow in a figure. By thus pulling the protective sheet 2 by the winding member 40, the protective sheet 2 moves in the direction of the arrow in the figure. Moreover, since the sliding board 21 is integrally attached to the protective sheet 2, the sliding board 21 can be similarly moved to the arrow direction in the figure. As a result, it is possible to return the sliding plate 21 and the protective sheet 2 as the floor material to the original positions with respect to the base 11.

  Moreover, Fig.13 (a) has shown the other form of the decompression | restoration process at the time of using the protection sheet 2 as a flooring. First, a plurality of holes 46 are formed along the side of at least one end 2a of the protective sheet 2 as a flooring material. The hole 46 may be reinforced by eyelets.

  Next, a winding member 49 having a spiral body 48 wound spirally and a tube body 47 inserted into the spiral body 48 is prepared. Incidentally, the spiral body 48 is made of a wire, metal, resin, or the like. Further, the helical interval of the helical body 48 corresponds to the interval between the adjacent holes 46.

  Then, the spiral body 48 in the winding member 49 is inserted into the hole 46 and rotated. At this time, the end of the spiral body 48 is inserted into the hole 46 at the end, and then the spiral body 48 is rotated, whereby the plurality of holes 46 are gradually inserted into the spiral body 48 and finally, as shown in FIG. As shown, the spiral body 48 is inserted through all the holes 46.

  Next, the tubular body 47 is pulled in the direction of the arrow in the figure. As a result, the protective sheet 2 can be pulled without stress concentration through the spiral body 48 wound around the tube body 47, and the protective sheet 2 moves in the direction of the arrow in the figure. Moreover, since the sliding board 21 is integrally attached to the protective sheet 2, the sliding board 21 can be similarly moved to the arrow direction in the figure. As a result, it is possible to return the sliding plate 21 and the protective sheet 2 as the floor material to the original positions with respect to the base 11.

  Incidentally, by performing eyelet reinforcement on the hole 46, it is possible to prevent the protective sheet 2 from being torn off even when the tensile force is increased by the helical body 48.

  The end of the spiral body 48 is provided with a ring 50 as shown in FIG. 13B. The ring 50 is fixed by being hooked on a U-shaped bar 51 originally attached to the tube body 47. It may be.

  Next, the restoration process in the case of using a floor material as shown in FIG. 10 having a plurality of leg portions 92 and a floor panel 93 supported by the upper ends of the leg portions 92 will be described. In order to actually carry out this restoration process, as shown in FIGS. 14 and 15A, a base 54, a base 11 provided on the base 54, and a slide installed on the base The displacement correction area | region 200 which has the board 21 and the detachable floor panel 56 attached integrally on the sliding board 21 is provided. As shown in the plan view of FIG. 14, the displacement correction area 200 is provided discretely or regularly in a part of the floor. In the seismic isolation region 202 other than the displacement correction region 200, the base 11, the sliding plate 21, the leg 92, and the floor panel 93 are provided in order from the bottom, but the displacement correction region 200 is used as an alternative to each of these members. The pedestal 54, the base 11, the sliding board 21, and the detachable floor panel 56 are provided in this order from the bottom.

  A flange 55 is provided at the upper end of the pedestal 54, and the bottom surface thereof is fixed by anchor bolts 58. The area of the flange 55 is configured to be larger than the cross-sectional area of the column portion of the base 54. The base 11 is provided on the upper surface of the flange 55 configured to be wide. A removable floor panel 56 is integrally attached to the upper surface of the sliding board 21 placed on the base 11. The detachable floor panel 56 is disposed so as to form substantially the same surface as the other floor panels 93 constituting the flooring.

  In addition to such a displacement correction area 200, another displacement correction area 201 may be provided at the wall. As shown in the plan view of FIG. 14, the displacement correction area 201 is provided at the wall in the floor. Except for the displacement correction region 201, the base 11, the sliding plate 21, the leg 92, and the floor panel 93 are provided in order from the bottom. However, the displacement correction region 201 has the leg 92, A floor panel 93 is provided, the base 11 is disposed on the floor panel 93, and the removable floor panel 53 is further provided on the base 11. Incidentally, the detachable floor panel 53 also serves as the sliding board 21 and is placed on the base 11. The removable floor panel 53 is disposed so as to form substantially the same surface as the other floor panels 93. The adjacent end of the floor panel 93 in the detachable floor panel 53 is detachably fixed on a step 93 a formed in the floor panel 93 in contact with the detachable floor panel 53. The area where the detachable floor panel 53 is provided is around the floor panel 93 as shown in FIG. And the removable floor panel 53 provided in the corner | angular part in a floor may be made into the trapezoid just by planar view.

  On the floor where the displacement correction areas 200 and 201 and the seismic isolation area 202 are provided, if seismic motion occurs, as shown in FIG. While the floor panel 93 as a flooring moves in the direction of the arrow in the drawing, the sliding plate 21 moves in the direction of the arrow in the drawing with respect to the base 11 and is integrally attached to the sliding plate 21 in the displacement correction region 200. The removable floor panel 56 will also move accordingly. Similarly, in the displacement correction region 201, the detachable floor panel 53 moves with respect to the base 11 in the direction of the arrow in the figure.

  In the present invention, when restoring these after the end of the earthquake, a plurality of jacks 64 are used at predetermined intervals as shown in FIG. In the displacement correction area 200, the base 11, the sliding board 21, and the removable floor panel 56 are removed. And on the base 54, the shape steel 63 in which the web 63a was erected was attached. The shape steel 63 is described by taking as an example the case where a T-shape steel is used in the present embodiment, but is not limited to this, as long as the web 63a is erected. Various other forms such as H-section steel may be applied. The section steel 63 is attached to the base 54 via bolts 58. A plurality of jacks 64 are attached to the web 63a at a predetermined interval. The jack 64 applies a pressing force to the object by, for example, expanding and contracting hydraulically, but it is needless to say that other means that can operate similarly may be substituted. After fixing such a jack 64 to the web 63a, a pressing force is applied to the floor panel 93. Thereby, it becomes possible to return to the original position the floor material which consists of the floor panel 93 and the leg part 92, and the sliding board 21 attached to this integrally.

  Similarly, in the displacement correction area 201, only the removable floor panel 53 is removed. Next, a plurality of jacks 64 are attached at predetermined intervals. One end of the jack 64 is attached to the wall 66 and applies a pressing force to the floor panel 93. Thereby, it becomes possible to return to the original position the floor material which consists of the floor panel 93 and the leg part 92, and the sliding board 21 attached to this integrally.

  In addition to any of the methods described above, as shown in FIG. 15D, the shape steel 121 raised to the height of the floor panel 93 is attached to the upper surface of the floor on which the base 11 is placed. Also good. The section steel 121 is composed of a section steel such as T-shaped steel or L-shaped steel. Such a section steel 121 is attached to the floor via anchor bolts 122, for example. At that time, a plurality of embedded nuts are previously installed in the floor. And the jack 64 may be attached with respect to the shape steel 121, and the floor panel 93 may be pressed through the said jack 64. FIG. In addition, you may make it provide this shape steel 121 in the position after removing the base 54. FIG.

  Moreover, you may make it employ | adopt a structure as shown to Fig.16 (a) besides any method mentioned above. In this configuration, the displacement correction area 201 includes a leg 92, a floor panel 93 supported by the upper end of the leg 92, and a detachable floor panel 53 that also serves as a sliding board fixed to the floor panel 93. At this time, in order to form the same surface as the floor panel 93, the removable floor panel 53 may be provided with a stepped portion on the floor panel 93 and the removable floor panel 53 fixed thereon, for example. The fixing method of the detachable floor panel 53 and the floor panel 93 may be realized by, for example, screwing or sticking via a double-sided tape.

  Further, the floor material upper base 11 a is provided on the floor panel 93 in the seismic isolation region 202. One end of the detachable floor panel 53 is placed on the floor material upper base 11a. That is, the detachable floor panel 53 is provided so as to be installed on the floor panel 93 and the floor material upper base 11a.

  As shown in FIG. 16 (b), when the sliding board 21, the leg 92, and the floor panel move on the base 11 in the seismic isolation region 202 due to the earthquake motion, the floor base 11a also moves. To do. On the other hand, since the detachable floor panel 53 is completely fixed, it does not move due to the earthquake motion. As a result, the detachable floor panel 53 moves relative to the floor material upper base 11a. Even in such a case, it is possible to perform the restoring operation by removing the removable floor panel 53 in the same manner.

  FIGS. 17A and 17B are examples in which a fabric foundation 68 is used as the pedestal 54. Similarly, the base 11 is attached to the upper surface of the fabric foundation 68, and the sliding plate 21 is attached on the base 11. And similarly to this sliding board 21, the detachable floor panel 56 is integrally attached. The fabric foundation 68 is extended in the longitudinal direction in the floor, but in such a case, it can be restored by the same restoration process.

  FIG. 18A is a bird's-eye view of the seismic isolation region 202 and the displacement correction regions 200 and 201 when the shape steel 63 is attached on the pedestal 54. FIG. 18B shows an example in which a strip-shaped cloth foundation 68 is used as the pedestal 54 and the shape steel 63 is attached on the cloth foundation 68. The displacement correction regions 200 and 201 are provided so as to form a cross road with each other, and the region that is surrounded by the displacement correction regions 200 and 201 is the seismic isolation region 202. This seismic isolation region 202 is the minimum unit for performing the above-described restoration operation.

  In the case of FIG. 18A, a section steel 63 is installed between the pedestals 54, a plurality of jacks 64 are attached to the section steel 63 at a predetermined interval, and the floor panel 93 is pressed in the restoring direction. To do. Further, in the case of FIG. 18B, the shape steel 63 is disposed on the cloth foundation 68, and a plurality of jacks 64 are attached to the shape steel 63 at a predetermined interval, and the floor panel is directed toward the restoring direction. 93 is pressed. Each of these operations is executed in units of the seismic isolation region 202 described above.

  In addition, as shown to Fig.19 (a), you may make it form the inclined surface 93b which inclines inside the floor panel 93 inward as it goes below. In such a case, when performing the pressing operation using the jack 64 described above, the attachment body 106 may be attached to the inclined surface 93 b at the end of the floor panel 93. In this attachment body 106, the other surface 107a facing one flat surface 107b is in the state in which the other surface 107a is in contact with the inclined surface 93b while the other surface 107a is in contact with the inclined surface 93b. It is to be fixed. At this time, the inclined surface 93b and the surface 107a may be attached to each other with a double-sided tape. Accordingly, it is possible to mount the mounting body 106 so that the one flat surface 107b is perpendicular to the surface of the floor panel 93. As a result, it is possible to apply a pressing force parallel to the horizontal direction to the floor panel 93 when pressing one flat surface 107b of the attachment body 106 via the jack 64.

  FIG. 19B shows a detailed configuration of floor panels 93 adjacent to each other provided with such an inclined surface 93b. In some cases, a gap may be formed between the floor panels 93 due to the inclined surface 93b. In such a case, the wedge 104 may be inserted into the gap.

  Incidentally, such a configuration shown in FIG. 19 can be applied to, for example, the floor panel 93 having the step 93a, and the configuration in which the wedge 104 is provided is the same as that of the floor panel 93 and FIG. 19 (a). May be provided in the gaps of all floor panels 93 that are not pressed by the jack 64 as shown in FIG.

  Incidentally, you may make it provide the groove part 105 in the floor panel 93 from the bottom face. In such a case, the leg portion 92 is provided with a flange 101 at the upper end, and a protruding portion 102 is provided above the flange 101. And you may make it fix these by inserting the groove part 105 in this protrusion part 102. FIG.

  Next, the restoration process after the end of the earthquake in the floor material using a concrete board will be described.

  FIG. 20A is a plan view when a concrete plate 150 is used as a flooring, and FIG. 20B is a cross-sectional view taken along line AA ′. A plurality of openings 151 are provided in the concrete plate 150 as a flooring material. In the opening 151, a plurality of embedded nuts 154 are previously installed on the bottom surface. The jack 64 is attached to the opening 151, and the wall surface of the opening 151 is pressed by the jack 64. When attaching the jack 64, a bolt 157 for fixing the jack 64 may be fixed to the embedded nut 154. Actually, the embedded nut 154 is provided, for example, in a grid shape inside the opening 151. When the jack 64 is attached, any one of these embedded nuts 154 is selected, and the bolt 157 is attached to the selected embedded nut 154. In the example of FIG. 20A, the case where the concrete plate 150 is pressed and restored in the direction of the arrow in the drawing is described as an example, but when the concrete plate 150 is pressed and restored in the other direction, The direction of the jack 64 is changed accordingly, and the embedded nut 154 required for fixing the jack 64 is selected.

  The openings 151 need to be provided at a plurality of locations with respect to the concrete plate 150. This is because the jack 64 can be attached to each of the openings 151 at a plurality of locations, and a pressing force can be applied at the plurality of locations.

  FIG. 21A is a plan view showing an example in which the opening 151 is configured to have a substantially circular shape, and FIG. 21B is a cross-sectional view taken along the line BB ′. The anchor shaft 162 is erected substantially at the center of the substantially circular opening 151. Then, the concrete plate 150 is pressed and moved by pressing the wall surface in the opening 151 by the jack 64 provided rotatably around the anchor shaft 162. At this time, the jack 64 is rotatably provided around the anchor shaft 162. For this reason, the angle adjustment is performed by rotating the concrete plate 150 so that the axis of the jack 64 is aligned with the return direction of the concrete plate 150 (direction to be moved). By pressing on that, it becomes possible to move the concrete board 150 toward a desired return direction. In particular, the opening 151 has a circular shape in a plan view, and the anchor shaft 162 is erected at the center of the opening 151, so that the shaft of the jack 64 can be pressed at all 360 °. Moreover, it is possible to apply a pressing force at a plurality of locations by receiving the openings 151 at a plurality of locations.

  FIGS. 22A and 22B show an example of a restoration process of a flooring having a concrete plate 150 in which at least two rectangular bay portions 171 are provided on each side. The jack 64 may be stored in each rectangular bay portion 171 in advance, and may be stored as it is when there is no earthquake. In the restoration process after the earthquake motion, a combination of two or more jacks 64 necessary for pressing the flooring in the return direction is selected from the jacks 64 housed in each rectangular bay portion 171. The selected jack 64 is taken out from the rectangular bay portion 171 and a spacer 172 is disposed in the rectangular bay portion 171 after being taken out. Furthermore, the sliding board 21 and the concrete board 150 are returned to an original position by pressing the spacer 172 with each taken out jack 64. Incidentally, the spacer 172 may be arranged either before or after the jack 64.

  In the present invention, the sliding plate 21 moves on the base 11 due to the earthquake motion, drops off from the base 11, and the sliding plate 21 moves on the floor surface around the base 11 by inertia. Then, the restoration process may be executed on the seismic isolation floor installed so as to stop after decelerating. That is, even if the sliding board 21 moves beyond the setback range and falls off the base 11, the sliding board 21 naturally stops after moving the upper surface 1a of the floor 1 to some extent due to inertia. To do. For this reason, it is possible to avoid that the precision instrument etc. which are placed on the sliding board 21 fall down by the natural stop of the movement of the sliding board 21 gradually.

  In the present invention, the seismic isolation floor itself is slightly displaced by a small-scale earthquake motion as well as a case where the seismic isolation floor itself has a large displacement such as a displacement due to an unexpected earthquake motion. Even in the case, it is of course possible to restore the original position easily.

DESCRIPTION OF SYMBOLS 1 Floor 2 Protective sheet 4 Equipment 7 Seismic isolation floor 11 Base 12 Convex curved surface part 21 Sliding board 22 Concave curved surface part 23 Sliding part 41 Insertion hole 43 Projection piece 46 Hole 47 Tubular body 48 Spiral body 50 Rings 53 and 56 Detachable floor panel 54 Pedestal 55 Flange 58 Bolt 63 Shape steel 64 Jack 66 Wall 68 Fabric base 72 Thick plate 83 Adhesive part 91 Gap 92 Leg part 93 Floor panel 101 Flange 102 Projection part 104 Wedge 105 Groove part 106 Attachment body 150 Concrete board 151 Opening 154 Embedded nut 157 Bolt 162 Anchor shaft 171 Rectangular bay 172 Spacer 200, 201 Displacement correction area

  In order to solve the above-described problems, in the present invention, a flat base having a plurality of upward convex curved portions aligned on the upper surface, and a flat planing board installed on the base When the flooring is integrally attached on the sliding board in the base-isolated floor and the sliding board and the flooring are moved on the base by earthquake motion, these are returned to their original positions after the earthquake. A restoring step for returning to the tube, wherein the restoring step forms a plurality of projecting pieces having a predetermined width by introducing cuts from one end of the protective sheet as the flooring, or a tube body in which a plurality of insertion holes are formed or The projecting piece is inserted into the insertion hole of the winding member made of a plate, and the protective sheet is wound by rotating the protruding piece, and the winding member is further pulled to pull the sliding plate and the flooring. original position And returning.

Claims (17)

On the planing plate in the base-isolated floor having a flat base formed by aligning a plurality of upward convex curved surface portions on the upper surface and a flat planing plate installed on the base When the flooring is attached integrally, and the sliding board and the flooring move on the base due to earthquake motion, there is a restoration process to return them to their original positions after the end of the earthquake. How to restore the floor. The restoration step forms a plurality of projecting pieces having a predetermined width by introducing cuts from one end of the protective sheet as the flooring,
While inserting the protruding piece into the insertion hole of the winding member consisting of a tube body or a plate body in which a plurality of insertion holes are formed, and winding the protective sheet by rotating it,
The method for restoring a seismic isolation floor according to claim 1, further comprising pulling the winding member to return the sliding board and the flooring to their original positions. The seismic isolation floor according to claim 2, wherein when the winding member made of a tube or plate having an elliptical cross-sectional shape is pulled, the strong axis direction of the cross-section is adjusted to be a tensile direction. How to restore. In the restoration step, a plurality of holes are formed along at least one end of the protective sheet as the flooring material,
The protective sheet is wound by inserting the helical body in a winding member having a helical body wound spirally and a tubular body inserted into the helical body into the hole and rotating the helical body,
Furthermore, the said base plate and the said flooring are returned to the original position by pulling the said tubular body in this winding member. The restoration method of the seismic isolation floor of Claim 1 characterized by the above-mentioned. The method for restoring a seismic isolation floor according to claim 4, wherein after the holes are drilled, they are reinforced by eyelets. The restoration step returns the sliding board and the floor material to their original positions by pressing the floor panel in the floor material having a plurality of leg portions and a floor panel supported by the upper ends of the leg portions. The method for restoring a seismic isolation floor according to claim 1. A pedestal, a base provided on the pedestal, a sliding board installed on the base, and a detachable floor panel integrally attached on the sliding board, the detachable type Displacement correction area is arranged in advance so that the floor panel forms substantially the same surface as the floor panel constituting the floor material,
When the sliding board and the floor material move on the base due to earthquake motion, and the sliding board and the removable floor panel move on the base in the displacement correction region, the restoration is performed after the earthquake ends. In the process, the base, the sliding board, and the removable floor panel in the displacement correction region are removed from the pedestal, and a shape steel having at least a web erected is attached to the upper surface of the pedestal, and a jack is attached to the web. The method of restoring a seismic isolation floor according to claim 6, wherein the floor panel is pressed through the jack. A plurality of legs, a floor panel supported by the upper ends of the legs, the base placed on the floor panel, and a detachable floor panel that also serves as the sliding board installed on the base And a displacement correction region disposed in advance so that the detachable floor panel forms substantially the same surface as the floor panel constituting the flooring,
When the sliding plate and the floor material move on the base due to earthquake motion, and the removable floor panel that also serves as the sliding plate moves on the base in the displacement correction region, in the restoration step, The separable floor according to claim 6, wherein the removable floor panel in the displacement correction area is removed from the base, a jack is attached to the wall, and the floor panel is pressed through the jack. Restoration method. In the restoration step, the detachable floor panel in the displacement correction region is removed from the base, and the shape steel raised to the height of the floor panel is attached to the upper surface of the floor on which the base is placed, and the shape The method for restoring a seismic isolation floor according to any one of claims 6 to 8, wherein a jack is attached to the steel and the floor panel is pressed through the jack. A plurality of legs, a floor panel supported by the upper ends of the legs, and a removable floor panel that also serves as the sliding board fixed on the floor panel, and one end of the removable floor panel is the above Displacement correction area to be placed on the flooring base provided on the flooring is provided in advance on the wall,
When the sliding board and the flooring material are moved on the base by earthquake motion, and the detachable floor panel in the displacement correction region is moved relative to the flooring base, along with this, The restoration method of a seismic isolation floor according to claim 6, wherein in the restoration step, the removable floor panel in the displacement correction region is removed from the base, and the sliding board and the flooring are returned to their original positions. . In the restoration step, with respect to the inclined surface of the floor panel in which an inclined surface inclined inward as it goes downward is formed at the end, the other surface facing one plane is the same as the inclined surface. The floor panel is fixed by fixing the mounting body having the inclination angle with the other surface in contact with the inclined surface and pressing the one flat surface of the mounting body through the jack. The method for restoring a base-isolated floor according to any one of claims 7 to 10, wherein the base is pressed. The seismic isolation system according to any one of claims 7 to 11, wherein a wedge is inserted between the end portions of the floor panel or a gap formed between the floor panel and the removable floor panel before the restoration step. How to restore the floor. In the restoration step, a jack is attached to each opening in the floor material having a concrete plate provided with a plurality of openings, and the wall surface of the opening is further pressed by the jack, whereby the sliding board and the floor material The method for restoring a base isolation floor according to claim 1, wherein the base is returned to its original position. The method for restoring a seismic isolation floor according to claim 13, wherein a bolt for fixing the jack is fixed to any nut in the opening in which a plurality of nuts are embedded in advance on the bottom surface. In the restoration step, an anchor shaft is erected substantially at the center of the substantially circular opening, and the jack provided rotatably around the anchor shaft is rotated in the return direction of the wall surface to The method for restoring a base isolation floor according to claim 13, wherein: At least two rectangular bay portions are provided on each side of the concrete floor material, and a jack is attached in advance to the rectangular bay portion. In the restoration step, the return direction of the floor material is the jack. By selecting a combination of two or more jacks necessary for pressing to the door, arranging a spacer before or after the selected jack, and further pressing each jack, the sliding board and the flooring are returned to their original positions. The method for restoring a seismic isolation floor according to claim 1, wherein The flat planing board is moved on the base by earthquake motion, dropped from the base, and the sliding board moves on the floor around the base by inertia and decelerates. The method for restoring a seismic isolation floor according to any one of claims 1 to 16, wherein the restoration process is performed on the seismic isolation floor installed so as to be stopped from the ground.

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