Wooden-base-underneath seismic isolation packing, and seismic isolation mechanism of architectural structure having the same

Abstract

To provide a wooden-base-underneath seismic isolation packing which seismically isolates earthquake force with an easy installation method without complicated structural calculation, and a seismic isolation mechanism of an architectural structure including the same.SOLUTION: A seismic isolation mechanism of an architectural structure including a foundation 1 in which an anchor bolt 40 is buried, a base 2 formed with a through hole 50 into which the anchor bolt 40 is inserted, and a wooden-base-underneath seismic isolation packing 10 interposed between the foundation 1 and the base 2, is configured such that, in an earthquake, sliding occurs in a contact face between the wooden-base-underneath seismic isolation packing 10 and the base 2, and sliding does not occur in a contact face between the wooden-base-underneath seismic isolation packing 10 and the foundation 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a seismic isolation packing for under wooden foundations and a seismic isolation mechanism for a building equipped with the same. [Background technology]

[0002] A seismic isolation mechanism of an anchor bolt and a friction seismic isolation device is known, which includes an anchor bolt buried in the foundation of a building to fix the foundation, a through hole into which the anchor bolt is inserted and which penetrates the foundation from top to bottom, a nut screwed into the upper end side of the anchor bolt, and a friction seismic isolation device interposed between the foundation and the foundation (see Patent Document 1). The friction seismic isolation device has a first sliding plate located at the upper stage and in close contact with the foundation, and a second sliding plate located at the lower stage and in close contact with the foundation, and the surface where the first sliding plate and the second sliding plate are overlapped is smooth. In this seismic isolation mechanism, the smooth part of the friction seismic isolation device becomes a sliding surface and functions as an isolator that slides during an earthquake, and a large number of small seismic isolation devices that use the bending stress of the anchor bolt as a spring are activated, resulting in a large seismic isolation effect. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7018550 Summary of the Invention [Problem to be solved by the invention]

[0004] However, since the load of the building mainly flows through the columns, then through the foundation, and then through the frictional seismic isolation device to the foundation and ground, it is reasonable to calculate the number of frictional seismic isolation devices to be installed near the columns according to the magnitude of the load transmitted to each column, and an engineer with a thorough knowledge of the structure is required. As a result, the current situation is that the spread of frictional seismic isolation devices is uncertain even though large earthquakes are predicted. Therefore, the inventor of the present application has been actively studying seismic isolation mechanisms with a structure different from that of Patent Document 1.

[0005] The present invention aims to provide a seismic isolation gasket for under-wooden foundations that has the function of isolating earthquake forces with a simple installation method that does not involve complex structural calculations, and a seismic isolation mechanism for a building that is equipped with the same. [Means for solving the problem]

[0006] In order to achieve the above-mentioned objective, the present invention provides a seismic isolation gasket that is inserted between the foundation and base of a building, and that is a seismic isolation gasket for under a wooden base, whose contact surface with the base slides during an earthquake, but whose contact surface with the base does not slide.

[0007] In the above-mentioned seismic isolation gasket for under wooden foundation, it is preferable that the upper surface in contact with the foundation is a smooth surface, and the lower surface in contact with the foundation has a convex portion or is a rough surface.

[0008] The above-mentioned wooden foundation seismic isolation gasket preferably has a flat plate portion extending horizontally and a plurality of column portions extending downward from the flat plate portion.

[0009] In addition, in the above-mentioned seismic isolation gasket for under wooden foundations, it is preferable that each of the pillars has a ventilation section that allows air to flow horizontally.

[0010] Furthermore, the wooden foundation seismic isolation packing may be made of plastic.

[0011] The wooden foundation seismic isolation packing may be made of engineering plastic.

[0012] In addition, the above-mentioned seismic isolation gasket for under wooden foundation may be made of metal.

[0013] In addition, it is preferable that the above-mentioned seismic isolation gasket for under wooden foundation has a cutout portion that is cut inward from the outer edge when viewed in a plane and that avoids interference with the anchor bolt.

[0014] In order to achieve the above-mentioned objective, the present invention provides a seismic isolation mechanism for a building, comprising a foundation into which an anchor bolt is buried, a base having a through hole into which the anchor bolt is inserted, and the wooden base seismic isolation gasket interposed between the foundation and the base.

[0015] In the above-mentioned seismic isolation mechanism for a building, it is preferable that the difference between the diameter of the through hole and the diameter of the anchor bolt is 10 mm or more. Effect of the Invention

[0016] According to the present invention, it is possible to provide a function of isolating earthquake forces with a simple installation method that does not involve complex structural calculations. [Brief description of the drawings]

[0017] [Figure 1] 1 is a schematic side view of a building showing a first embodiment of the present invention; [Diagram 2] This is a schematic partial plan view of a building showing the arrangement of seismic isolation gaskets under a wooden foundation. [Diagram 3] FIG. 4 is an enlarged side view illustrating an anchor bolt and a through hole. [Figure 4] This is an underside view of the seismic isolation gasket under the wooden foundation. [Diagram 5] This is a side cross-sectional view of a seismic isolation gasket under a wooden foundation. [Figure 6] FIG. 2 is a schematic explanatory side view of a building showing a modified example of the first embodiment. [Figure 7] FIG. 11 is a bottom view of a wooden foundation seismic isolation gasket showing a modified example of the first embodiment. [Figure 8] FIG. 11 is a cross-sectional side view of a wooden foundation seismic isolation gasket showing a modified example of the first embodiment. [Figure 9] FIG. 11 is a cross-sectional side view of a wooden foundation seismic isolation gasket showing a modified example of the first embodiment. [Figure 10] FIG. 11 is a bottom view of a wooden foundation seismic isolation gasket showing a modified example of the first embodiment. [Figure 11]FIG. 4 is an enlarged explanatory side view of an anchor bolt and a through hole showing a modified example of the first embodiment. [Figure 12] FIG. 4 is an enlarged explanatory side view of an anchor bolt and a through hole showing a modified example of the first embodiment. [Figure 13] FIG. 4 is an enlarged explanatory side view of an anchor bolt and a through hole showing a modified example of the first embodiment. [Figure 14] FIG. 11 is a perspective view of a washer showing a modified example of the first embodiment. [Figure 15] FIG. 13 is an enlarged explanatory side view of a modified example of the first embodiment, showing the anchor bolt and the through hole in a state in which the washer is placed on the upper surface of the base before the nut is screwed onto the anchor bolt. [Figure 16] FIG. 11 is a schematic side view of a building showing a second embodiment of the present invention. [Figure 17] This is a schematic partial plan view of a building showing the arrangement of seismic isolation gaskets under a wooden foundation. [Figure 18] This is a top view of the seismic isolation gasket under the wooden foundation. [Figure 19] This is a side view of the seismic isolation gasket under the wooden foundation. [Figure 20] FIG. 2 is a schematic cross-sectional view of a building showing the insulated state when basic insulation is applied. [Figure 21] FIG. 11 is a top view of a wooden foundation seismic isolation gasket showing a modified example of the second embodiment. [Figure 22] FIG. 11 is a bottom view of a wooden foundation seismic isolation gasket showing a modified example of the second embodiment. [Figure 23] FIG. 11 is a cross-sectional side view of a wooden foundation seismic isolation gasket showing a modified example of the second embodiment. [Figure 24] FIG. 11 is a schematic side view of a building showing a third embodiment of the present invention. [Diagram 25] This is a schematic plan view of a building showing the arrangement of seismic isolation gaskets under a wooden foundation. [Figure 26] This is an underside view of the seismic isolation gasket under the first wooden foundation. [Figure 27] This is a side cross-sectional view of the seismic isolation gasket under the first wooden foundation. [Figure 28]This is an underside view of the seismic isolation gasket under the second wooden foundation. [Figure 29] This is a side cross-sectional view of the seismic isolation gasket under the second wooden foundation. [Diagram 30] This is an underside view of the third wooden foundation seismic isolation gasket. [Diagram 31] This is a side cross-sectional view of the third wooden foundation seismic isolation gasket. [Diagram 32] FIG. 2 is a schematic side view of a building showing an insulated state. [Diagram 33] 13A and 13B are bottom views of the first wooden foundation seismic isolation gasket showing a modified example of the third embodiment, where (a) is a view showing the whole structure and (b) is a view showing only the cylindrical portion. [Diagram 34] 13A and 13B are side cross-sectional views of the first wooden foundation seismic isolation gasket showing a modified example of the third embodiment, where (a) is a view showing the whole structure and (b) is a view showing only the cylindrical portion. [Diagram 35] FIG. 13 is a schematic side view of a building showing a fourth embodiment. [Diagram 36] This is a top view of the seismic isolation gasket under the first wooden foundation. [Figure 37] FIG. 11 is a side view of the first wooden foundation seismic isolation gasket, where (a) is a view showing the whole structure and (b) is a view showing only the end portion on the inclined surface side. [Figure 38] This is a top view of the seismic isolation gasket under the second wooden foundation. [Figure 39] This is a side view of the seismic isolation gasket under the second wooden foundation. [Diagram 40] This is a top view of the seismic isolation gasket under the third wooden foundation. [Diagram 41] This is a side view of the third wooden foundation seismic isolation gasket. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Figures 1 to 5 show a first embodiment of the present invention, where Figure 1 is a schematic side view of a building, Figure 2 is a schematic partial plan view of a building showing the arrangement of a seismic isolation packing under a wooden foundation, Figure 3 is an enlarged side view of an anchor bolt and a through hole, Figure 4 is a bottom view of the seismic isolation packing under a wooden foundation, and Figure 5 is a side cross-sectional view of the seismic isolation packing under a wooden foundation. Note that Figures 1 to 3 are explanatory views, and hatching and the like are omitted.

[0019] As shown in FIG. 1, the wooden base seismic isolation packings 10 are interposed between the foundation 1 and the foundation 2 of the building in a distributed manner. The wooden base seismic isolation packings 10 are arranged in a portion of the foundation 1 where a relatively large load is applied. Specifically, as shown in FIG. 2, each wooden base seismic isolation packing 10 is arranged so as to overlap all the columns 3 on the foundation 1 in a plan view, and is arranged so as to overlap the main underpinnings in a plan view. A plurality of anchor bolts 40 for fixing the foundation 2 are buried in the foundation 1 at a predetermined distance from the center of the column 3. In this embodiment, the anchor bolts 40 are buried at a position 200 mm from the center of the column 3. The anchor bolts 40 extend upward from the foundation 1, are inserted into through holes 50 that vertically penetrate the foundation 2, and are screwed into nuts 60 at the upper end side. When the hold-down hardware 4 is provided on the column 3 of the building as shown in FIG. 1 and FIG. 2, an anchor bolt 70 other than the anchor bolts 40 for fixing the foundation 2 is connected. In this embodiment, the building is made of wood, with the foundation 1 being made of concrete and the base 2 being made of wood.

[0020] As shown in Fig. 3, the nut 60 has a long nut portion 61 that screws into the anchor bolt 40, and a round seat 62 formed on the upper end side of the long nut portion 61. The nut 60 is a so-called seat-engraved nut, and a plurality of triangular ridges 63 are formed radially outward on the lower surface of the round seat 62. Each triangular ridge 63 has a triangular cross section with an acute apex angle, and is formed so that the height of the apex increases toward the radially outward direction. In this embodiment, the upper end of the nut 60 after tightening is at the same level as the upper surface of the base 2. The top of the anchor bolt 40 is restrained by the nut 60 having the long nut portion 61 and the round seat 62.

[0021] In this embodiment, the height and width dimensions of the base 2 are set to 105 mm, the diameter of the anchor bolt 40 is 12 mm, the diameter of the through hole 50 is 24 mm, and the diameter of the round seat 62 of the nut 60 is 45 mm. The dimensions of the base 2 are arbitrary, and for example, the height and width dimensions may be 89 mm, 120 mm, etc. The diameters of the anchor bolt 40 and the through hole 50 can also be changed arbitrarily, and for example, the diameter of the anchor bolt 40 may be 16 mm, and the diameter of the through hole 50 may be 28 mm. Here, the "diameter of the anchor bolt" in the specification does not refer to the diameter of the part of the anchor bolt on the lower end side where the threads are not formed, but the diameter of the part of the upper end side where the threads are formed. In other words, a "diameter of the anchor bolt" of 12 mm means that the diameter of the part of the upper end side where the threads are formed is 12 mm, and the part of the lower end side where the threads are not formed may be, for example, 12 mm or 10.6 mm. Considering the seismic isolation effect of the building during an earthquake, it is preferable to make the diameter of the through hole 50 10 mm or more larger than the diameter of the anchor bolt 40. Also, considering damage to each part and each facility of the building during an earthquake, it is preferable to make the difference between the diameter of the through hole 50 and the diameter of the anchor bolt 40 30 mm or less.

[0022] As shown in FIG. 2, the wooden foundation seismic isolation packing 10 is formed in a rectangular shape in a plan view and is arranged at a location where it does not interfere with the anchor bolts 40, 70. The wooden foundation seismic isolation packing 10 may be made of any material, but in this embodiment, it is made of engineering plastic. Examples of engineering plastics include polyamide, polyacetal, polycarbonate, modified polyphenylene ether, polybutylene terephthalate, polyphenylene sulfide, polysulfone, polyethersulfone, polyarylate, polyamideimide, polyetheretherketone, and liquid crystal polymer. The wooden foundation seismic isolation packing 10 may also be made of fiber-reinforced plastic, which is made of plastic as a base material and reinforced with glass fiber, carbon fiber, or the like. In this specification, "plastic" also includes fiber-reinforced plastic.

[0023] As shown in FIG. 4 and FIG. 5, the wooden foundation seismic isolation packing 10 has a flat plate portion 11 and a plurality of cylindrical portions 12 protruding downward from the flat plate portion 11. The flat plate portion 11 is formed in a rectangular shape in a plan view, and the upper surface forms a smooth surface 14 that contacts the foundation 2. In this embodiment, the longitudinal dimension of the flat plate portion 11 is set to a dimension equal to the distance from the center of the column 3 to the anchor bolt 40, and the wooden foundation seismic isolation packing 10 is arranged so as to overlap with the column 3 in a plan view, so that it does not interfere with the anchor bolt 40. In other words, by making the longitudinal dimension of the flat plate portion 11 larger than the length of one side of the column 3 and equal to or smaller than the distance from the center of the column 3 to the anchor bolt 40, the wooden foundation seismic isolation packing 10 arranged directly below the column 3 does not interfere with the anchor bolt 40. Specifically, the plan view dimensions of the wooden foundation seismic isolation packing 10 in this embodiment are 100 mm for the short side and 200 mm for the long side. The size of the flat plate portion 11 is determined by the strength of the material of the wooden foundation seismic isolation packing 10 against the building load and the strength of the wood of the foundation 2. When the material of the wooden foundation seismic isolation packing 10 is made of a relatively strong engineering plastic as in this embodiment, it is preferable to make it about 100 x 200 mm.

[0024] The cylindrical portions 12 as columns are arranged vertically and horizontally in a plan view, and a plurality of convex portions 19 are formed on the lower surface at equal intervals in the circumferential direction. The cylindrical portions 12 may be arranged randomly, for example, without being arranged vertically and horizontally, and the arrangement state of the cylindrical portions 12 can be changed arbitrarily. The cylindrical portions 12 function as height adjustment portions, and the height of the wooden foundation seismic isolation packing 10 can be changed arbitrarily by changing the vertical dimension. In this embodiment, the height dimension of each cylindrical portion 12 is 13 mm. In this embodiment, each convex portion 19 has a truncated cone shape. The shape of each convex portion 19 is arbitrary, and can be, for example, a cylindrical shape, a rectangular column shape, a truncated pyramid shape, etc. The dimensions of the convex portions 19 are arbitrary, but for example, the height from the lower surface can be 0.2 mm or more and 0.3 mm or less, and the diameter of the base end can be about 1 mm. It goes without saying that the size and shape of the cylindrical portion 12 can be changed as appropriate as long as the required strength is ensured and air can pass through.

[0025] As shown in Fig. 5, corners 16 formed by the upper surface and side surface of flat plate portion 11 are chamfered. In this embodiment, corners 16 are angular, but may be rounded. Also, as shown in Fig. 4, a plurality of ribs 17 are formed on the lower surface of flat plate portion 11. In this embodiment, ribs 17 surrounding each cylindrical portion 12 and ribs 17 connecting cylindrical portions 12 arranged on the outer edge side are formed on flat plate portion 11. Note that each rib 17 can be omitted as appropriate.

[0026] The operation of the seismic isolation mechanism for a building equipped with the anchor bolts and seismic isolation packing for under the wooden foundation constructed as described above during an earthquake will now be described. When a relative horizontal load is applied to the foundation 1 and the sill 2 during an earthquake, horizontal slippage occurs between the smooth surface 14 of each wooden foundation seismic isolation packing 10 and the bottom surface of the sill 2, dissipating seismic energy. The top surface of the wooden foundation seismic isolation packing 10 slides against the bottom surface of the sill 2 to function as an isolator. In this embodiment, the corners 16 of each wooden foundation seismic isolation packing 10 are chamfered, so that the corners 16 do not bite into the sill 2, and slippage is likely to occur between each wooden foundation seismic isolation packing 10 and the sill 2. On the other hand, each convex portion 19 of each cylindrical portion 12 functions as a slip prevention member, so no slippage occurs between the bottom end of each wooden foundation seismic isolation packing 10 and the top surface of the foundation 1. The foundation 1 and each wooden foundation seismic isolation packing 10 are bonded by an adhesive as necessary. In addition, when a relative horizontal load is applied to the foundation 1 and the base 2 during an earthquake, the anchor bolts 40, 70 are bent, generating bending stress inside the anchor bolts 40, 70. Earthquake energy is also consumed by the bending stress of the anchor bolts 40, 70. In this way, the anchor bolts 40, 70 and the wooden base seismic isolation packings 10 work together to consume earthquake energy. In this way, the seismic isolation mechanism equipped with the wooden base seismic isolation packings 10 of the new structure of this embodiment is a seismic isolation mechanism that uses the sliding friction between the upper surface of the wooden base seismic isolation packings 10 and the lower surface of the base 2 and the bending stress of the anchor bolts 40, 70 as a spring, so that it can have a relatively large contact surface with sufficient strength, and can be provided with the function of isolating earthquake force with a simple installation method that does not involve complicated structural calculations.

[0027] In this embodiment, the diameter of the through hole 50 is 10 mm or more larger than the diameter of the anchor bolts 40, 70, so that a relatively large bending stress can be generated in the anchor bolts 40, 70 throughout the entire section of the through hole 50. Also, in this embodiment, the difference between the diameter of the through hole 50 and the diameter of the anchor bolts 40, 70 is 30 mm or less, so that the relative movement amount between the foundation 1 and the base 2 is kept to 30 mm or less, and a seismic isolation effect can be obtained while reducing the possibility of causing major damage to each part and each piece of equipment of the building during an earthquake.

[0028] In addition, according to the wooden foundation seismic isolation packing 10 of this embodiment, since the lower side is the cylindrical portion 12, it is possible to secure a wide air circulation path between the foundation 1 and the foundation 2. In this way, by reducing the air resistance between the foundation 1 and the foundation 2 and increasing the amount of ventilation, it is possible to suppress the occurrence of termites and the decay of the foundation 2. In addition, while it is considered that the height dimension to prevent the intrusion of mice is preferably 15 mm or less, by making the vertical dimension of each cylindrical portion 12 13 mm, it is possible to reliably prevent the intrusion of mice. In this embodiment, by making the vertical dimension of the cylindrical portion 12 13 mm, even if unevenness occurs in at least one of the foundation 1 and the foundation 2, it is possible to reliably make the distance between the foundation 1 and the flat plate portion 81 15 mm or less. Furthermore, by making the distance between each cylindrical portion 12, for example, 15 mm or less, it is also possible to prevent the intrusion of mice.

[0029] Fig. 6 to Fig. 8 show a modified example of the first embodiment, Fig. 6 is a schematic side view of a building, Fig. 7 is a bottom view of a seismic isolation packing for under wooden foundation, and Fig. 8 is a side cross-sectional view of the seismic isolation packing for under wooden foundation. Note that Fig. 6 is an explanatory view, and hatching and the like are omitted. As shown in Fig. 6, this seismic isolation packing for under wooden foundation 80 is also inserted between the foundation 1 and the base 2 of a building. Note that Fig. 6 is an explanatory view, and hatching and the like are omitted.

[0030] As shown in Figs. 7 and 8, the wooden foundation seismic isolation packing 80 has a flat plate portion 81 and a plurality of cylindrical portions 82 protruding downward from the flat plate portion 81. The flat plate portion 81 is formed in a rectangular shape in a plan view, and the upper surface forms a smooth surface 84 that contacts the foundation 2. The cylindrical portions 82 as pillar portions are arranged vertically and horizontally in a plan view, and the lower ends form rough surfaces 85 that contact the foundation 1. As shown in Figs. 7 and 8, each cylindrical portion 82 has a slit 82a extending in the width direction of the flat plate portion 81. Each slit 82a is formed in the center of each cylindrical portion 82 in the longitudinal direction of the flat plate portion 81. Each slit 82a is formed from the tip to the base end of each cylindrical portion 82.

[0031] As shown in FIG. 8, the lower surface of the flat plate portion 81 is formed so that the portions where the cylindrical portions 82 are formed are raised. Note that FIG. 7 does not show the inclination state of the lower surface of the flat plate portion 81. The lower surface of the flat plate portion 81 has an inclined portion 81a that is inclined so as to rise from the longitudinal end portion and the widthwise end portion of the flat plate portion 81, and from the intermediate portion of each cylindrical portion 82 toward the base end portion of each cylindrical portion 82. In this embodiment, the slit 82a portion of each cylindrical portion 82 on the lower surface of the flat plate portion 81 is also inclined so as to rise toward the protruding portion 82b of each cylindrical portion 82. Specifically, the lower surface of the flat plate portion 81 has an inclined portion 81b that is inclined so as to rise from the intermediate portion of the pair of protruding portions 82b of each cylindrical portion 82 toward each protruding portion 82b. Also, in this embodiment, the portion where the gate is disposed during molding is formed flat. Specifically, the lower surface of the flat plate portion 81 has a flat portion 81c formed in a predetermined range in the center in the longitudinal direction. In this embodiment, the flat portion 81c is formed between the two cylindrical portions 82 located in the center in the longitudinal direction.

[0032] Each cylindrical portion 82 functions as a height adjustment portion, and the height of the wooden foundation seismic isolation packing 80 can be changed as desired by changing the vertical dimension. The vertical dimension of each cylindrical portion 82 is formed to be larger than that of the flat plate portion 81. In this embodiment, the vertical dimension of the flat plate portion 81 is 4 mm, and the vertical dimension of each cylindrical portion 82 is 9 mm. The vertical dimension of this flat plate portion 81 includes the height change of 1 mm of each of the inclined portions 81a, 81b, and the vertical dimension of the thinnest part of the flat plate portion 81 is 3 mm.

[0033] 8, corners 86 formed by the upper surface and side surface of flat plate portion 81 are chamfered. In this embodiment, corners 86 are curved with a predetermined curvature, and specifically, the radius of curvature of corners 86 is 2 mm.

[0034] The seismic isolation mechanism for a building equipped with the anchor bolts and wooden base seismic isolation packing constructed as above can also achieve the same effect during an earthquake as in the first embodiment. In addition, according to this wooden base seismic isolation packing 80, the slits 82a are formed in the cylindrical portion 82, so that the air flow resistance can be significantly reduced and the ventilation volume can be dramatically increased.

[0035] 7 and 8 show that the inclined surface 81b is formed between the protruding portions 82b of each cylindrical portion 82, but the space between the protruding portions 82b may be flat, for example, as shown in Fig. 9. Furthermore, the entire lower surface of the flat plate portion 81 may be flat.

[0036] 7 and 8 show the columnar portion 82 having the slits 82a formed therein, but as shown in Fig. 10, for example, the slits 89a may be formed in the cylindrical portion 89. Furthermore, the height adjustment portion may be shaped like a square pillar or a square tube, and the slits may be formed therein.

[0037] In the above embodiment, the so-called joist-less construction method has been shown in which the upper end of the nut 60 is at the same level as the upper surface of the foundation 2 or several mm below the upper surface, but it goes without saying that the present invention can be applied to the so-called joist floor construction method in which the upper ends of the nuts 160, 260, 360 are higher than the upper surface of the foundation 2, as shown in Figures 11 to 13. In the buildings in Figures 11 to 13, the anchor bolt 140 is installed so that the upper end is higher than the surface of the foundation 2 when it is embedded in the foundation 1.

[0038] The nut 160 shown in FIG. 11 does not have the long nut portion 61 and the round seat 62 as in the nut 60 of the above embodiment, and is used in combination with a washer 162 through which the anchor bolt 140 is inserted and which contacts the surface of the base 2. This nut 160 is preferably provided with an anti-loosening function, and is disposed on the upper surface of the washer 162 and is screwed into the upper end of the anchor bolt 140. In the modified example of FIG. 11, the through hole 50 is not formed to have the same diameter from top to bottom as in the above embodiment, and a two-stage drilled through hole 150 is used. The diameter of the upper side of the through hole 150 is smaller than that of the lower side, and for example, the diameter of the lower side can be 24 mm and the diameter of the upper side can be 16 mm to 18 mm. In the modified example of FIG. 11, by making the diameter of the upper side smaller, the spring of the bending stress of the anchor bolt 140 can be used. In addition, as shown in FIG. 12, the nut 160 can be used in combination with a washer 262 that is embedded in the base 2 by a seat boring drill or the like. In the modification of Fig. 12, the through hole 50 is formed to have the same diameter from the top to the bottom. In the modification of Fig. 12, the embedded washer 262 allows the spring of the bending stress of the anchor bolt 140 to be applied.

[0039] Furthermore, as shown in FIG. 13, a washer 362 having a slip prevention function with respect to the base 2 can be used. This washer 362 can also make the bending stress of the anchor bolt 140 spring. As shown in FIG. 14, this washer 362 has a flat portion 362b in which an insertion hole 362a for the anchor bolt 140 is formed, and a protruding portion 362c formed on the outer edge side of the flat portion 362b and protruding downward from the flat portion 362b. The washer 362 has a circular shape in a plan view, and the protruding portion 362c is formed by bending the outer edge side of the washer 362 so as to be inclined downward toward the radial outside. The diameter of the radial inner end of the protruding portion 362c of the washer 362 is formed to be larger than the diameter of the through hole 50. The outer diameter of the washer 362 is arbitrary, but can be, for example, 45 mm.

[0040] A method of fastening the anchor bolt 140 and the nut 160 using the washer 362 for preventing slippage with respect to the base 2 will be described below. As shown in FIG. 15, the base 2 is set on the foundation 1 so that the anchor bolt 140 passes through the through hole 50, and the washer 362 is inserted into the anchor bolt 140 and brought into contact with the upper surface of the base 2. In this state, the washer 362 is moved downward by tightening the nut 160 screwed onto the anchor bolt 140, and the protruding portion 362c is driven into the base 2. The washer 362 made of metal has high strength compared to the base 2 made of wood, so that the protruding portion 362c can be driven smoothly into the base 2. After the flat portion 362b comes into contact with the upper surface of the base 2, the downward movement of the washer 362 stops at a position according to the torque of the tool used, and the anchor bolt 140 and the nut 160 are fastened. This method of fastening the anchor bolt 140 and the nut 160 can be applied to both new construction and remodeling of buildings. In the case of remodeling, the fastened existing nut 160 is temporarily removed from the anchor bolt 140, and after carrying out the prescribed work related to the remodeling such as repair, the anchor bolt 140 and the nut 160 are fastened again. When fastening again, the existing nut 160 may be reused, or a new nut 160 may be used.

[0041] According to the fastening structure of the anchor bolt 140 and the nut 160 using the washer 362 for preventing slippage, the top of the anchor bolt 140 is restrained by the washer 362 to the base 2 side. As a result, even if an earthquake, typhoon, or the like occurs and a horizontal force is applied to the base 2 due to shaking, wind, or the like, the base 2 will not be shifted horizontally relative to the anchor bolt 140, the washer 362, or the like, and the fastening state of the anchor bolt 140 and the nut 160 can be maintained. Therefore, the fastening structure of the anchor bolt 140 and the nut 160 using the washer 362 for preventing slippage can be said to have solved the problem of the fastening structure of the anchor bolt and the nut using a flat washer, that is, when a horizontal load is applied to the base due to shaking, wind, or the like, the base and the washer slip, causing the base to be shifted horizontally. In Figs. 13 to 15, the protruding portion 362c of the washer 362 is shown to be inclined downward toward the radially outward direction, but the shape of the protruding portion 362c can be changed as desired. In addition, the washer 362 has a circular shape in plan view, but the shape of the washer 362 in plan view is not limited to this.

[0042] The following (1) to (3) are examples of solutions to the problem of the base shifting horizontally when a flat washer is used. (1) A method for fastening an anchor bolt and a nut comprising: a foundation; an anchor bolt extending upward from the foundation; a base made of wood and arranged above the foundation; a through hole formed in the base and through which the anchor bolt is inserted; a washer inserted through the anchor bolt and in contact with an upper surface of the base; and a nut screwed onto an upper end side of the anchor bolt, wherein a predetermined clearance is secured between a wall surface of the through hole and the anchor bolt, The washer has a flat portion in which an insertion hole for the anchor bolt is formed, and a protruding portion formed on an outer edge side of the flat portion and protruding downward from the flat portion, A method for fastening an anchor bolt and a nut, in which the washer inserted into the anchor bolt is placed on the upper surface of the base and the nut that screws into the anchor bolt is tightened to move the washer downward, thereby embedding at least a portion of the protrusion into the base. (2) Fundamentals and An anchor bolt extending upward from the foundation; A base made of wood and disposed above the foundation; A through hole formed in the base and through which the anchor bolt is inserted; A washer that is inserted through the anchor bolt and contacts the upper surface of the base; a nut that is screwed onto the upper end side of the anchor bolt, A fastening structure of an anchor bolt and a nut in which a predetermined clearance is secured between a wall surface of the through hole and the anchor bolt, The washer has a flat portion in which an insertion hole for the anchor bolt is formed, and a protruding portion formed on an outer edge side of the flat portion and protruding downward from the flat portion, The protrusion is embedded in the base, The flat portion is a fastening structure of an anchor bolt and a nut that contacts the upper surface of the base. (3) A washer used in a fastening structure of an anchor bolt and a nut, the fastening structure comprising: a foundation; an anchor bolt extending upward from the foundation; a base made of wood and arranged above the foundation; a through hole formed in the base and through which the anchor bolt is inserted; a washer that is inserted through the anchor bolt and that contacts an upper surface of the base; and a nut that screws onto an upper end side of the anchor bolt, the washer being used in a fastening structure of an anchor bolt and a nut, the fastening structure having a predetermined clearance between a wall surface of the through hole and the anchor bolt, A flat portion having an insertion hole for the anchor bolt formed therein; a protrusion formed on an outer edge side of the flat portion and protruding downward from the flat portion, The washer is configured to prevent slippage with the base when inserted into the anchor bolt and placed on the upper surface of the base, and moved downward by tightening the nut that screws into the anchor bolt, so that at least a portion of the protrusion is embedded into the base.

[0043] Fig. 16 to Fig. 20 show a second embodiment of the present invention, Fig. 16 is a schematic side view of a building, Fig. 17 is a schematic partial plan view of a building showing the arrangement of a seismic isolation packing under a wooden foundation, Fig. 18 is a top view of the seismic isolation packing under a wooden foundation, Fig. 19 is a side view of the seismic isolation packing under a wooden foundation, and Fig. 20 is a schematic cross-sectional view of a building showing the insulated state. Note that Fig. 16 and Fig. 20 are explanatory views, and hatching and the like are omitted.

[0044] As shown in Figs. 16 and 17, the wooden base seismic isolation packing 110 of the second embodiment is also inserted between the foundation 1 and the foundation 2 of the building in a distributed manner, as in the first embodiment. The building of the second embodiment differs from the building of the first embodiment in the shape of the wooden base seismic isolation packing 110. As shown in Fig. 16, this wooden base seismic isolation packing 110 does not have a column part and is flat. In this embodiment, the height dimension of the wooden base seismic isolation packing 110 is about 5 mm. In the second embodiment, a so-called foundation insulation method is used in which insulation material is applied to the inside or outside of the foundation 1 and the floor is mechanically heated or air-conditioned by ventilation, without taking measures against deterioration due to underfloor ventilation as in normal wooden buildings. In the second embodiment, a thin wooden base seismic isolation packing 110 is used to prevent internal condensation and to provide slit insulation incorporating an insulation layer of an air layer of 1 cm or less that is effective for drying wood.

[0045] As shown in FIG. 18 and FIG. 19, the wooden base seismic isolation packing 110 is made of engineering plastic and is formed in a rectangular shape in a plan view, with the upper surface forming a smooth surface 114 that contacts the base 2, and the lower surface having a plurality of protruding portions 119 that contact the foundation 1. In this embodiment, the longitudinal dimension of the wooden base seismic isolation packing 110 is set to a dimension equal to the distance from the center of the column 3 to the anchor bolt 40, and specifically, the plan view dimension of the wooden base seismic isolation packing 10 in this embodiment is 100 mm for the short side and 200 mm for the long side. In this embodiment, each protrusion 119 has a truncated cone shape. The shape of each protrusion 119 is arbitrary, and can be, for example, a cylindrical shape, a rectangular column shape, a pyramidal shape, or the like. The dimensions of each protrusion 119 are arbitrary, but for example, the height from the lower surface can be 0.2 mm or more and 0.3 mm or less, and the diameter of the base end can be about 1 mm. Each protrusion 119 functions as an anti-slip material for the foundation 1 during an earthquake. Instead of the protrusions 119, the lower surface may be roughened.

[0046] As shown in FIG. 18, a first inclined surface 118a is formed on the outer edge of the upper surface of one of the long and short sides, inclining downward toward the outside in the normal direction, and a second inclined surface 118b is formed on the outer edge of the upper surface of the other long and short side, which is steeper than the first inclined surface 118a. The first and second inclined surfaces 118a and 118b make it easy to install the wooden foundation seismic isolation packing 110 by driving it in. In addition, the wooden foundation seismic isolation packing 110 has an adjustment groove 190 that can receive tools and the like. The adjustment groove 190 is formed so that it penetrates the flat plate portion of the wooden foundation seismic isolation packing 110 in the thickness direction and extends inward from a predetermined side. In this embodiment, the adjustment groove 190 is formed so that the width dimension of the terminal side is larger than that of the base end side. In this embodiment, the adjustment groove 190 has an inclined surface 190b formed continuously with the second inclined surface 118b.

[0047] As shown in FIG. 20, in this building, a heat insulating panel 5 is provided on the indoor side of the foundation 1 located on the periphery. Note that heat insulation may be performed on the outdoor side of the foundation 1. Also, a foamed sprayed insulation material 6 is provided from the upper end of the heat insulating panel 5 to the indoor side of the foundation 2 so as to cover the indoor side of the wooden foundation seismic isolation packing 110. The wooden foundation seismic isolation packing 110 of this embodiment is relatively thin, and the space between the foundation 1 and the foundation 2 is slit-shaped, so that good heat insulation can be obtained. Note that, when good heat insulation can be obtained with the wooden foundation seismic isolation packing 10 having a column part as in the first embodiment, the vertical dimension of the column part may be reduced. The foamed sprayed insulation material 6 is assumed to follow even if the wooden foundation seismic isolation packing 110 or the like slides by several millimeters. If it is slidable in this way, the foamed sprayed insulation material 6 may be a dry insulation material. In this embodiment, an elastic spraying agent is used as the foaming spray insulation material 6, and the wood decay state can be monitored by utilizing the wood insulation effect, and the concrete surface is installed so that condensation does not occur on the indoor side. The insulation panel 5 and the foaming spray insulation material 6 provide insulation, and condensation due to exposure of the concrete of the foundation 1 is unlikely to occur. In addition, the opposite side of the foaming spray insulation material 6 is in the form of an open slit so that metal such as reinforcing bars inside the foundation 1 does not cause internal condensation, and the effect of air layer insulation and the effect of drying wood can be obtained. Note that, although an example using the insulation panel 5 is shown here, in addition to dry panels, insulation materials such as insulation spraying agents and foaming agents can also be used.

[0048] In the seismic isolation mechanism for a building equipped with the anchor bolts and the wooden base seismic isolation packing of this embodiment, the same action as that of the first embodiment can be obtained during an earthquake. Furthermore, for example, a wooden base seismic isolation packing 210 of a modified example of the second embodiment shown in Figs. 21 to 23 can also be used. This wooden base seismic isolation packing 210 is made of engineering plastic and, as shown in Figs. 21 and 22, is formed in a rectangular shape in a plan view, has a smooth surface 214 on the upper surface that contacts the base 2, and has a plurality of convex parts 219 on the lower surface that contacts the foundation 1. As shown in Fig. 23, in this wooden base seismic isolation packing 210, each convex part 219 has a flat base part 219a having a rectangular shape in a plan view and an inclined part 219b that inclines upward from the periphery of the base part 219a. Note that the inclination state of the lower surface of the wooden base seismic isolation packing 210 is not shown in Fig. 22. Each convex part 219 functions as a slip stopper against the foundation 1 during an earthquake. The shape of the protrusion 219 is arbitrary, and the lower surface can be roughened instead of the protrusion 219. As shown in Fig. 21, a first inclined surface 218a that slopes downward toward the outside in the normal direction is formed on the outer edge of the upper surface of one long side and short side, and a second inclined surface 218b that is steeper than the first inclined surface 218a is formed on the outer edge of the upper surface of the other long side and short side. The first and second inclined surfaces 218a and 218b make it easy to install the wooden foundation seismic isolation packing 210 by driving it in.

[0049] Figures 24 to 32 show the third embodiment of the present invention, in which Figure 24 is a schematic side view of a building, Figure 25 is a schematic plan view of a building showing the arrangement of the wooden base seismic isolation packing, Figure 26 is a bottom view of the first wooden base seismic isolation packing, Figure 27 is a side cross-sectional view of the first wooden base seismic isolation packing, Figure 28 is a bottom view of the second wooden base seismic isolation packing, Figure 29 is a side cross-sectional view of the second wooden base seismic isolation packing, Figure 30 is a bottom view of the third wooden base seismic isolation packing, Figure 31 is a side cross-sectional view of the third wooden base seismic isolation packing, and Figure 32 is a schematic side view of a building showing the thermal insulation state. Note that Figures 24 and 32 are explanatory views, and hatching and the like are omitted. As shown in Figures 24 and 25, in this embodiment, three types of wooden base seismic isolation packings 310, 320, and 330 are used. In this embodiment, each of the wooden base seismic isolation packings 310, 320, and 330 is made of a general plastic having a lower strength than engineering plastic. In this embodiment, the installation area of ​​the wooden base seismic isolation packings 310, 320, and 330 needs to be large, so they are installed over almost the entire surface between the foundation 1 and the base 2.

[0050] As shown in Figures 26 and 27, the first wooden foundation seismic isolation packing 310 is formed in a square shape in a plan view, and is mainly used directly below the columns 3 and at the joints between the foundation 2 and joists, etc., where cross-sectional defects are likely to occur in the foundation 2. As shown in Figures 28 and 29, the second wooden foundation seismic isolation packing 320 is shaped so as not to interfere with the anchor bolts 40, 70, and is used at the installation locations of the anchor bolts 40, 70. As shown in Figures 30 and 31, the third wooden foundation seismic isolation packing 330 is formed in a rectangular shape in a plan view, and is used in areas other than where the first and second wooden foundation seismic isolation packings 310, 320 are located.

[0051] As shown in Figs. 26 and 27, the first wooden foundation seismic isolation packing 310 has a flat plate portion 311 and a plurality of cylindrical portions 312 protruding downward from the flat plate portion 311. The flat plate portion 311 is formed in a square shape in a plan view, and the upper surface forms a smooth surface 314 that contacts the base 2. The cylindrical portions 312 as pillar portions are arranged vertically and horizontally in a plan view, and the lower surface forms a rough surface 315 that contacts the foundation 1. The vertical dimension of each cylindrical portion 312 is formed to be larger than that of the flat plate portion 311. Each cylindrical portion 312 functions as a height adjustment portion, and the height of the first wooden foundation seismic isolation packing 310 can be arbitrarily changed by changing the vertical dimension. In this embodiment, the vertical dimension of each wooden foundation seismic isolation packing 310, 320, 330 is 19 mm, the vertical dimension of the flat plate portion 311 of the first wooden foundation seismic isolation packing 310 is 5 mm, and the vertical dimension of each cylindrical portion 312 is 14 mm. As shown in FIG. 27, the corner portion 316 formed by the upper surface and side surface of the flat plate portion 311 is chamfered. In this embodiment, the corner portion 316 is curved with a predetermined curvature, and specifically, the curvature radius of the corner portion 316 is 2 mm. Note that the corner portion 316 may be an angular surface instead of a round surface. Also, as shown in FIG. 26, a plurality of ribs 317 are formed on the lower surface of the flat plate portion 311. In this embodiment, the flat plate portion 311 is formed with a diagonal rib 317 and a linear rib 317 connecting the midpoints of the opposite sides. Note that each rib 317 can be omitted as appropriate.

[0052] As shown in FIG. 28 and FIG. 29, the second wooden foundation seismic isolation packing 320 has a flat plate portion 321 and a plurality of cylindrical portions 322 protruding downward from the flat plate portion 21. The flat plate portion 321 has a notch portion 323 that is cut from the outer edge toward the inside in a plan view and avoids interference with the anchor bolts 40, 70. In this embodiment, the notch portion 323 has a rectangular shape cut out in one of the width directions of both ends of the longitudinal direction of the foundation 1 and the base 2 in the flat plate portion 321, and the flat plate portion 321 has a T-shape in a plan view. The flat plate portion 321 has a smooth surface 324 on the upper surface that contacts the base 2. The cylindrical portions 322 as columns are arranged vertically and horizontally in a plan view, and the lower ends form a rough surface 325 that contacts the foundation 1. The vertical dimension of each cylindrical portion 322 is formed to be larger than that of the flat plate portion 321. Each cylindrical portion 322 functions as a height adjustment portion, and the height of the second wooden foundation seismic isolation packing 320 can be changed as desired by changing the vertical dimension. In this embodiment, the vertical dimension of the flat plate portion 321 is 5 mm, and the vertical dimension of each cylindrical portion 322 is 14 mm. As shown in FIG. 29, corners 326 formed by the upper surface and side surface of the flat plate portion 321 are chamfered. In this embodiment, the corners 326 are curved with a predetermined curvature, and specifically, the radius of curvature of the corners 326 is 2 mm. The corners 326 may be angular rather than rounded.

[0053] As shown in FIG. 30 and FIG. 31, the third wooden foundation seismic isolation packing 330 has a flat plate portion 331 and a plurality of cylindrical portions 332 protruding downward from the flat plate portion 331. The flat plate portion 331 is formed in a rectangular shape in a plan view, and the upper surface forms a smooth surface 334 that contacts the foundation 2. The cylindrical portions 332 as pillar portions are arranged vertically and horizontally in a plan view, and the lower ends form rough surfaces 335 that contact the foundation 1. The vertical dimensions of each cylindrical portion 332 are formed to be larger than that of the flat plate portion 331. Each cylindrical portion 332 functions as a height adjustment portion, and the height of the third wooden foundation seismic isolation packing 330 can be arbitrarily changed by changing the vertical dimensions. In this embodiment, the vertical dimensions of the flat plate portion 331 are 5 mm, and the vertical dimensions of each cylindrical portion 332 are 14 mm. 31, corners 336 formed by the upper surface and side surface of flat plate portion 331 are chamfered. In this embodiment, corners 336 are curved with a predetermined curvature, and specifically, the radius of curvature of corners 336 is 2 mm. Note that corners 336 may be angular surfaces instead of rounded surfaces.

[0054] As shown in FIG. 25, in principle, the first wooden foundation seismic isolation packing 310, the second wooden foundation seismic isolation packing 320, or the third wooden foundation seismic isolation packing 330 is installed in all areas on the foundation 1. However, for places where no load is applied, such as the ends of the foundation 1, areas where the wooden foundation seismic isolation packings 310, 320, and 330 are not installed can also be set. If the areas on the foundation 1 where the wooden foundation seismic isolation packings 310, 320, and 330 are not installed are located on the outer periphery, a separate rat-proof material may be provided. In FIG. 25, the non-installation area 301a is shown by hatching for the sake of explanation. As shown in FIG. 25, the first wooden foundation seismic isolation packing 310 is placed in a part of the foundation 1 where a relatively large load is applied. In this embodiment, the first wooden foundation seismic isolation packing 310 is placed below all the columns 3 on the foundation 1 and below the main underpinnings. Additionally, the second wooden foundation seismic isolation gasket 320 is placed at the installation location of the anchor bolts 40, 70 on the foundation 1. The third wooden foundation seismic isolation gasket 330 is placed in a portion where neither the first wooden foundation seismic isolation gasket 310 nor the second wooden foundation seismic isolation gasket 320 is placed. If the first wooden foundation seismic isolation gasket 310 and the second wooden foundation seismic isolation gasket 320 are given relatively high strength, the third wooden foundation seismic isolation gasket 330 can be omitted at will.

[0055] As shown in Figure 32, in the building of this embodiment, an insulating panel 5 is also provided on the indoor side of the foundation 1 located on the periphery, and foamed spray insulation material 6 is provided from the upper end of the insulating panel 5 to the indoor side of the base 2, covering the indoor sides of the wooden base seismic isolation gaskets 310, 320, and 330.

[0056] The seismic isolation mechanism for a building equipped with the anchor bolts and wooden base seismic isolation packings configured as above can also achieve the same effect as the first embodiment during an earthquake. In addition, in this embodiment, the second wooden base seismic isolation packing 320 having the notch 323 is disposed near the anchor bolts 40, 70, so that the second wooden base seismic isolation packing 320 can be attached and detached from the outside in the width direction of the base 1 and the foundation 2 without interfering with the anchor bolts 40, 70. As a result, when performing maintenance or replacement of each wooden base seismic isolation packing 310, 320, 330, it is not necessary to raise the wooden structure of the building by a relatively large amount (for example, about 300 mm), and huge costs are not incurred.

[0057] In addition, the first wooden foundation seismic isolation packing 310, which is square in plan view, is arranged under all the columns 3. This ensures the pressure resistance of the column portion where a relatively large axial force acts. On the other hand, except for the lower part of the columns 3, the second wooden foundation seismic isolation packing 320 is arranged in the portion where the anchor bolts 40, 70 are arranged, and the third wooden foundation seismic isolation packing 330 is arranged in the portion where the anchor bolts 40, 70 are not arranged. In this way, by making a set of wooden foundation seismic isolation packings including the second wooden foundation seismic isolation packing 320 having the notch 323, and the first wooden foundation seismic isolation packing 310 and the third wooden foundation seismic isolation packing 330 not having the notch 323, it is possible to deal with both the corner part and the middle part of the foundation 1 in plan view.

[0058] In the above embodiment, the lower surface of each wooden foundation seismic isolation packing 310, 320, 330 is roughened 315, 325, 335, but as shown in Fig. 33 and Fig. 34, instead of forming a roughened surface, the lower surface may have a plurality of convex portions 319 that contact the foundation 1. In this modification, as shown in Fig. 33(b) and Fig. 34(b), a plurality of convex portions 319 are formed at equal intervals in the circumferential direction on the lower surface of the cylindrical portion 312. In Fig. 33(b) and Fig. 34(b), an example is shown in which each convex portion 319 is frustum-shaped, but the shape of each convex portion 319 is arbitrary, and for example, it can be cylindrical, prismatic, or pyramidal. The dimensions of the convex portion 319 are also arbitrary, and for example, the height from the lower surface can be 0.2 mm or more and 0.3 mm or less, and the diameter of the base end can be about 1 mm.

[0059] In the first and third embodiments and their modified examples, the column portion extending downward from the flat plate portion 11, 81, 311, 321, 331 is shown as the cylindrical portion 12, 312, 322, 332 or the columnar portion 82, but it may be, for example, a polygonal tube or a polygonal column. The shape, dimensions, arrangement, etc. of the column portion can be appropriately changed according to, for example, the ventilation amount, airtightness, etc., within a range in which strength against an applied load is ensured.

[0060] 35 to 41 show the fourth embodiment of the present invention, in which FIG. 35 is a schematic side view of a building, FIG. 36 is a top view of the first wooden base seismic isolation packing, and FIG. 37 is a side view of the first wooden base seismic isolation packing. FIG. 38 is a top view of the second wooden base seismic isolation packing, FIG. 39 is a side view of the second wooden base seismic isolation packing, FIG. 40 is a top view of the third wooden base seismic isolation packing, and FIG. 41 is a side view of the third wooden base seismic isolation packing. Note that FIG. 35 is an explanatory view, and hatching and the like are omitted. In the fourth embodiment, flat wooden base seismic isolation packings 410, 420, and 430 without a column portion as shown in FIG. 35 to FIG. 41 are used.

[0061] As shown in Figs. 37 and 38, the first wooden foundation seismic isolation packing 410 of the fourth embodiment is made of metal, is formed in a square shape in a plan view, has a smooth surface 414 on the upper surface that contacts the foundation 2, and has a plurality of protruding parts 419 on the lower surface that contacts the foundation 1. Specifically, the first wooden foundation seismic isolation packing 410 is made of stainless steel. In this specification, "metal" includes alloys such as stainless steel. As shown in Fig. 38(b), each protruding part 419 is formed in a truncated cone shape, and for example, the height from the lower surface can be 0.2 mm or more and 0.3 mm or less, and the diameter of the base end can be about 1 mm. Each protruding part 419 functions as a slip prevention against the foundation 1 during an earthquake. It is also possible to use a rough surface instead of the protruding part 419. In addition, an inclined surface 418 that inclines downward toward the outside in the normal direction is formed on the outer edge of the upper surface of a predetermined side. The inclined surface 418 makes it easy to install the first wooden foundation seismic isolation gasket 410 by driving it in.

[0062] As shown in FIG. 39 and FIG. 40, the second wooden foundation seismic isolation packing 420 of the fourth embodiment is made of metal, has a smooth surface 424 on the upper surface that contacts the foundation 2, and has a plurality of protruding parts 429 on the lower surface that contacts the foundation 1. Specifically, the second wooden foundation seismic isolation packing 420 is made of stainless steel. Each protruding part 429 is formed in a truncated cone shape, and for example, the height from the lower surface can be 0.2 mm to 0.3 mm, and the diameter of the base end can be about 1 mm. Each protruding part 429 functions as a slip prevention for the foundation 1 during an earthquake. It is also possible to use a rough surface instead of the protruding part 429. The cutout part 423 of the second wooden foundation seismic isolation packing 420 has a shape in which one of the width directions of both ends of the longitudinal direction of the foundation 1 and the foundation 2 is cut out in a rectangular shape, and the second wooden foundation seismic isolation packing 420 has a T-shape in a plan view. Also, an inclined surface 428 that slopes downward toward one side in the width direction is formed on the outer edge of one end in the width direction on the longitudinal center side of the top surface. The inclined surface 428 makes it easy to install the second wooden foundation seismic isolation packing 420 by driving it in. Also, a corner 426 at one end in the width direction on the longitudinal center side of the top surface is curved with a predetermined curvature.

[0063] As shown in FIG. 41 and FIG. 42, the third wooden foundation seismic isolation packing 430 of the fourth embodiment is made of metal, is formed in a rectangular shape in a plan view, has a smooth surface 434 on the upper surface that contacts the base 2, and has a plurality of protruding parts 439 on the lower surface that contacts the foundation 1. Each protruding part 439 is formed in a truncated cone shape, and can have a height from the lower surface of 0.2 mm to 0.3 mm, and a diameter of the base end of about 1 mm. The third wooden foundation seismic isolation packing 430 is specifically made of stainless steel. Each protruding part 439 functions as a slip prevention against the foundation 1 during an earthquake. It is also possible to use a rough surface instead of the protruding part 439. In addition, an inclined surface 438 that inclines downward toward the outside in the normal direction is formed on the outer edge of the upper surface of a predetermined long side. The inclined surface 438 makes it easy to install the third wooden foundation seismic isolation packing 430 by driving it in. The seismic isolation effect can also be obtained by using the flat wooden foundation seismic isolation packings 410, 420, 430 shown in Figs. 36 to 42.

[0064] In addition, each of the wooden foundation seismic isolation packings 10, 80, 110, 210, 310, 320, 330, 410, 420, 430 may be manufactured as a dedicated product for the seismic isolation mechanism of the building, or may be manufactured by processing known parts. For example, each of the wooden foundation seismic isolation packings 10, 80, 110, 210, 310, 320, 330, 410, 420, 430 may be manufactured by smoothing the upper surface of a known foundation packing.

[0065] Although the embodiments of the present invention have been described above, the invention according to the claims is not limited to the above-described embodiments. It should be noted that not all of the combinations of features described in the embodiments are essential to the means for solving the problems of the invention. [Explanation of symbols]

[0066] 1 Basics 2. Foundation 3 Pillars 4 Hold-down hardware 5. Insulation Panels 6. Foam spray insulation 10 Seismic isolation packing under wooden foundation 11 Flat plate part 12 Cylindrical part 14 Smooth Surface 16 Corner 17 Ribs 19 Convex 40 Anchor bolt 50 Through hole 60 Nut 61 Long nut section 62 Round seat 63 Triangular protrusion 70 Anchor bolt 80 Seismic isolation packing for wooden foundation 81 Flat plate part 81a Slope 81b Slope 81c flat area 82 Cylinder 82a Slit 82b Projecting part 84 Smooth Surface 85 Rough Surface 86 Corner 89 Cylindrical part 89a Slit 110 Seismic isolation packing under wooden foundation 114 Smooth Surface 118a 1st slope 118b 2nd slope 119 Convex 162 Washer 190 Adjustment groove 190b Slope 210 Seismic isolation packing for wooden foundation 214 Smooth Surface 218a 1st slope 218b 2nd slope 219 Convex 219a Daibu 219b Slope 262 Washer 310 Seismic isolation packing under the first wooden foundation 311 Flat plate part 312 Cylindrical part 314 Smooth Surface 315 Rough surface 316 Corner 317 Rib 319 Convex 320 Second wooden foundation seismic isolation packing 321 Flat plate part 322 Cylindrical section 323 Notch 324 Smooth Surface 325 Rough surface 326 Corner 330 Seismic isolation packing under the third wooden foundation 331 Flat plate part 332 Cylindrical section 334 Smooth Surface 335 Rough Surface 336 Corner 362 Washer 362a Insertion hole 362b Flat area 362c protrusion 410 Seismic isolation packing under the first wooden foundation 414 Smooth Surface 418 Slope 419 Convex 420 Second wooden foundation seismic isolation packing 423 Notch 424 Smooth Surface 426 Corner 428 Slope 429 Convex 430 Seismic isolation packing under the third wooden foundation 434 Smooth Surface 438 Slope 439 Convex

Claims

1. A seismic isolation packing that is inserted between the foundation and base of a building, This seismic isolation packing for under wooden foundations has a surface that contacts the foundation that slides during an earthquake, but a surface that contacts the foundation that does not slide.

2. The upper surface that comes into contact with the base is a smooth surface, The seismic isolation gasket for under wooden foundations according to claim 1, wherein the lower surface that comes into contact with the foundation has a convex portion or is a rough surface.

3. A flat plate portion extending in a horizontal direction; The wooden foundation seismic isolation gasket according to claim 2, further comprising a plurality of column portions extending downward from the flat plate portion.

4. The seismic isolation gasket for under wooden foundations according to claim 3, wherein each of the pillars has a ventilation section through which air can flow horizontally.

5. The seismic isolation packing for under wooden foundations according to claim 1, which is made of plastic.

6. The seismic isolation gasket for under wooden foundations according to claim 5, which is made of engineering plastic.

7. The seismic isolation gasket for under wooden foundations according to claim 1, which is made of metal.

8. 2. The seismic isolation gasket for under wooden foundations according to claim 1, which has a notch that is cut inward from the outer edge when viewed in a plane, to avoid interference with anchor bolts.

9. A foundation in which the anchor bolt is embedded; a base having a through hole into which the anchor bolt is inserted; A seismic isolation mechanism for a building comprising: a wooden foundation seismic isolation gasket according to any one of claims 1 to 7, which is interposed between the foundation and the base.

10. The seismic isolation mechanism for a building according to claim 9, wherein the difference between the diameter of the through hole and the diameter of the anchor bolt is 10 mm or more.

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