Installation structure for the upper member, and installation method for the upper member.

Abstract

To suppress problems that occur when installing an upper member.SOLUTION: An upper member installation structure comprises: a lower structure; a plate having a plate hole portion penetrating in a thickness direction and installed on an upper surface of the lower structure; an upper member installed on the plate; a filling material filled between the lower structure and the upper member inside surrounded with the plate; a fixing material embedded in the lower structure, having a joining hole portion with a female thread, and fixed to the plate so that the plate hole portion communicates with the joining hole portion; and a ring-shaped elastic body placed on an elastic body installation portion inside the plate hole portion. The elastic body is compressed by pressure of the upper member to prevent the filling material from flowing into the joining hole portion.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an upper member installation structure and an upper member installation method.

Background Art

[0002] As a method for installing a seismic isolation device on a substructure, for example, Patent Document 1 discloses a construction method in which an annular base plate is arranged on the upper part of a substructure, a filler is placed inside the base plate such that the center of the filler is raised, a seismic isolation device is placed thereon to crush the filler. In this construction method, high fillability of the filler into the void under the seismic isolation device (between the lower flange of the seismic isolation device and the substructure) can be ensured, and filling can be confirmed by the filler leaking from the entire outer periphery of the seismic isolation device (lower flange).

[0003] Further, the upper portion of a fixing member (anchor bolt) is fixed under the base plate by welding or the like, and the fixing member is embedded in the substructure, thereby enhancing the fixing performance to the substructure.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0005] When crushing the filler with the seismic isolation device (specifically, the lower flange), the filler spreading outward from the center may flow into the screw hole portion (joining hole portion) of the internal thread of the fixing member through the plate hole of the base plate. If the filler flows into the screw hole portion, there is a risk of causing problems such as becoming an obstacle when screwing a bolt (external thread) for attaching the lower flange (upper member) of the seismic isolation device, or the filler not leaking from the outer periphery of the seismic isolation device, making filling confirmation impossible.

[0006] This invention has been made in view of the above problems, and its purpose is to suppress problems when installing the upper member. [Means for solving the problem]

[0007] The main invention for achieving the above objective is an installation structure for an upper member, comprising: a lower structure; a plate having a plate hole that penetrates in the thickness direction and is installed on the upper surface of the lower structure; an upper member installed on the plate; a filler material that fills the space between the lower structure and the upper member inside the plate; a fixing material embedded in the lower structure, having a joining hole with an internal screw, and fixed to the plate so that the plate hole and the joining hole are in communication; and an annular elastic body placed on an elastic body installation portion inside the plate hole, wherein the elastic body is compressed by the pressure of the upper member to prevent the filler material from flowing into the joining hole.

[0008] Other features of the present invention will be made clearer by description in this specification and the accompanying drawings. [Effects of the Invention]

[0009] According to the present invention, problems when installing the upper member can be suppressed. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic cross-sectional view showing the installation structure of the seismic isolation device in this embodiment. [Figure 2] Figures 2A to 2C are diagrams illustrating the relationship between the base plate 20, the rubber ring 30, and the fixing material 40. [Figure 3] This is a flowchart showing the installation method of the seismic isolation device 10 of this embodiment. [Figure 4] Figures 4A and 4B show the state when the seismic isolation device 10 is installed. [Figure 5] This is an explanatory diagram showing, step by step, what happens when the seismic isolation device 10 is pressed downwards. [Figure 6] Figures 6A to 6G show modified configurations of the base plate 20, rubber ring 30, and fixing material 40. [Modes for carrying out the invention]

[0011] The following matters become clear from this specification and the accompanying drawings:

[0012] (Aspect 1) An installation structure for an upper member, comprising: a lower structure; a plate having a plate hole that penetrates in the thickness direction and is installed on the upper surface of the lower structure; an upper member installed on the plate; a filler material that fills the space between the lower structure and the upper member inside the plate; a fixing material embedded in the lower structure, having a joining hole with an internal screw, and fixed to the plate so that the plate hole and the joining hole communicate; and an annular elastic body placed on an elastic body installation portion inside the plate hole, wherein the elastic body is compressed by the pressure of the upper member to prevent the filler material from flowing into the joining hole.

[0013] According to the installation structure of the upper member in embodiment 1, when installing the upper member, the filler material does not flow into the joining hole, thus suppressing problems when installing the upper member.

[0014] (Aspect 2) The installation structure for the upper member described in Embodiment 1 preferably includes a through member that is joined to the joining hole and penetrates the plate hole and the upper member hole formed in the upper member.

[0015] According to the installation structure of the upper member in embodiment 2, when installing the upper member, the hole in the plate and the hole in the upper member can be aligned. In other words, the upper member and the plate can be aligned.

[0016] (Aspect 3) The upper member installation structure according to aspect 1, preferably comprising a bonding material that is bonded into the bonding hole, penetrates through the plate hole and an upper member hole formed in the upper member, and bonds the upper member and the fixing material.

[0017] According to the upper member installation structure of aspect 3, the upper member, the plate, and the fixing material can be integrally fastened.

[0018] (Aspect 4) The upper member installation structure according to aspect 3, wherein it is preferable that an inner diameter of the elastic body is larger than an outer diameter of a bonding portion of the bonding material that is bonded to the fixing material.

[0019] According to the upper member installation structure of aspect 4, it is possible to cope with deformation when the elastic body is compressed.

[0020] (Aspect 5) The upper member installation structure according to any one of aspects 1 to 4, wherein it is preferable that the elastic body is compressed by pressing of the upper member and stored in the elastic body installation portion.

[0021] According to the upper member installation structure of aspect 5, the upper member and the plate can be brought into contact with each other while preventing filling material from flowing into the bonding hole.

[0022] (Aspect 6) The upper member installation structure according to any one of aspects 1 to 5, wherein it is preferable that, before the elastic body is compressed by the upper member, a part of the elastic body protrudes above an upper surface of the plate.

[0023] According to the upper member installation structure of aspect 6, filling material can be reliably prevented from flowing into the bonding hole.

[0024] (Aspect 7) The upper member installation structure according to any one of aspects 1 to 6, wherein it is preferable that, before the elastic body is compressed by the upper member, the filling material is heaped higher than an upper surface of the plate.

[0025] According to the installation structure of the upper member in embodiment 7, the upper member can compress (spread) the filler material, and the filler material can be filled between the upper member and the lower structure.

[0026] (Pattern 8) An installation structure for the upper member according to any of embodiments 1 to 7, wherein the fixing material is fixed in contact with the lower part of the plate hole, and the elastic body installation portion may be formed at the same height as the lower surface of the plate.

[0027] According to the installation structure of the upper member in embodiment 8, the structure of joining the anchoring material and the plate can be simplified.

[0028] (Aspect 9) An installation structure for an upper member according to any of embodiments 1 to 7, wherein the fixing material is fitted or screwed into the plate hole and fixed, and the elastic body installation portion may be formed at a height higher than the lower surface of the plate and lower than the upper surface of the plate.

[0029] According to the installation structure of the upper member in embodiment 9, the bonding between the plate and the anchoring material can be improved. In addition, the height of the elastic body can be made smaller (lower) than the thickness of the plate.

[0030] (Aspect 10) An installation structure for an upper member according to any of embodiments 1 to 7, wherein the fixing material may have an overlapping portion that fits or screws into the plate hole, and a locking portion that extends to the outside of the overlapping portion, abuts against the lower part of the plate hole, and locks the plate hole.

[0031] According to the installation structure of the upper member in embodiment 10, the presence of overlapping and locking portions makes it easy to join the fixing material and the plate in an overlapping (fitted or screwed) state.

[0032] (Aspect 11) An installation structure for the upper member according to embodiment 9 or 10, wherein the fixing material may have a protrusion on the inside of the elastic body that protrudes above the elastic body installation portion.

[0033] According to the installation structure of the upper member in embodiment 11, compared to the case without a protrusion, the upper end of the fixing material (screw hole portion) can be brought closer to the upper member, and the screwing length can be increased.

[0034] (Aspect 12) In the installation structure for the upper member described in embodiment 11, it is desirable that a gap is formed between the inner side of the elastic body and the protrusion, or between the outer side of the elastic body and the inner circumferential surface of the plate hole, before the elastic body is compressed by the upper member.

[0035] According to the installation structure of the upper member in embodiment 12, a compressed elastic body can be accommodated between the inner circumferential surface of the plate hole and the protrusion.

[0036] (Aspect 13) In the installation structure for the upper member described in embodiment 11, it is desirable that the upper end of the protrusion is lower than the upper surface of the plate.

[0037] According to the installation structure of the upper member described in Embodiment 13, a gap is formed between the upper surface of the plate (in other words, the lower surface of the upper member) and the upper end of the protrusion. Therefore, a compressed elastic body can be accommodated in this gap (between the lower surface of the upper member and the upper end of the protrusion).

[0038] (Aspect 14) A method for installing an upper member, comprising: an anchoring material joining step of fixing an anchoring material having a joining hole with an internal thread to a plate having a plate hole that penetrates in the thickness direction, such that the plate hole and the joining hole are in communication; an elastic body placement step of placing an annular elastic body on an elastic body placement portion inside the plate hole; a lower structure forming step of casting a lower structure and embedding the anchoring material in the lower structure; a filler application step of piling filler higher than the upper surface of the plate on the inside of the lower structure surrounded by the plate; and an upper member installation step of installing an upper member on the plate and filling the space between the upper member and the lower structure with filler, wherein in the upper member installation step, the elastic body is compressed by the pressure of the upper member to prevent the filler from flowing into the joining hole of the anchoring material.

[0039] According to the upper member installation method of embodiment 14, problems caused by the filling material pressed against the upper member flowing into the joining hole during the upper member installation process can be suppressed.

[0040] ===Implementation Method===

[0041] <<Regarding the installation structure of seismic isolation devices>> Figure 1 is a schematic cross-sectional view showing the installation structure of the seismic isolation device in this embodiment. In this embodiment, the upper vertical direction is referred to as "up," and the lower vertical direction is referred to as "down." This upper and lower direction (vertical direction) corresponds to the thickness direction of the base plate 20, which will be described later.

[0042] The seismic isolation device installation structure shown in Figure 1 is a structure in which the seismic isolation device 10 is installed on the substructure 1, and is composed of a base plate 20, a rubber ring 30, a fixing material 40, and a filling material 70.

[0043] The substructure 1 is, for example, a structure made of concrete. In this embodiment, the seismic isolation structure is an intermediate-floor seismic isolation structure in which a seismic isolation layer is provided in the middle floor of the building, and the substructure 1 is the lower part of the building. A seismic isolation device 10 is installed between this substructure 1 and the upper part of the building (superstructure (not shown)). However, it is not limited to this, and for example, a foundation seismic isolation structure in which a seismic isolation layer is provided at the very bottom of the building may also be used. In the case of foundation seismic isolation, the substructure 1 is provided on the ground.

[0044] The seismic isolation device 10 is interposed between the substructure 1 and the superstructure (not shown), supporting the superstructure and extending the period of horizontal vibration of the superstructure (seismic isolation support). The seismic isolation device 10 is constructed by sandwiching laminated rubber 12 between an upper flange 13 and a lower flange 14.

[0045] The laminated rubber 12 is, for example, a cylindrical elastic body formed by alternately laminating thin circular steel plates and rubber layers in an alternating vertical arrangement. However, it is not limited to this, and for example, the laminated rubber 12 may be a columnar elastic body with a polygonal base.

[0046] The upper flange 13 and the lower flange 14 are plate-shaped members (for example, circular steel plates) with an outer diameter larger than the laminated rubber 12. The upper flange 13 has multiple flange holes 13a extending vertically through it, located outside the laminated rubber 12. Similarly, the lower flange 14 has multiple flange holes 14a extending vertically through it, located outside the laminated rubber 12.

[0047] The upper flange 13 is fixed to the superstructure (not shown) by mounting bolts (not shown). A detailed explanation is omitted here.

[0048] The lower flange 14 (corresponding to the upper member) is fixed to the anchoring material 40 (in other words, the lower structure 1) via the base plate 20 by mounting bolts 16. As will be described later, the base plate 20 has the rubber ring 30 and the anchoring material 40 integrated into it.

[0049] The mounting bolt 16 (corresponding to the connecting material) is a bolt with a head, and the bolt portion (corresponding to the connecting portion) has male threads formed around it. The bolt portion of the mounting bolt 16 passes through the flange hole 14a of the lower flange 14 (corresponding to the upper member hole) and the plate hole 20a of the base plate 20 (described later), and is screwed (connected) to the threaded hole 41a (described later) of the high nut 41 of the anchoring material 40. In this way, the mounting bolt 16 integrally fastens the lower flange 14, the base plate 20, and the anchoring material 40 (high nut 41), and bearing-joins the lower flange 14 to the base plate 20.

[0050] Figures 2A to 2C illustrate the relationship between the base plate 20, the rubber ring 30, and the fixing material 40. Figure 2A is a top view, Figure 2B is a perspective view of the AA section of Figure 2A, and Figure 2C shows the state with the rubber ring 30 removed from Figure 2B.

[0051] The base plate 20 (equivalent to a plate) is a component for installing the seismic isolation device 10, and is an annular (circular ring) steel plate with a circular outer shape and a concentric circular penetration portion 21 formed on the inside. In this example, the base plate 20 is made circular to match the circular shape of the lower flange 14 (upper member) of the seismic isolation device 10, but its shape is not limited to a circle and is determined according to the shape of the lower flange 14. For example, if the lower flange 14 is rectangular or polygonal, the base plate 20 will be formed in a rectangular or polygonal shape to match.

[0052] The base plate 20 is provided with plate holes 20a that penetrate in the thickness direction (here, vertical direction) at positions corresponding to the multiple flange holes 14a of the lower flange 14. The flange holes 14a of the lower flange 14 and the plate holes 20a of the base plate 20 are simple through holes without threads. The lower part of the plate hole 20a is concave with a small hole diameter, and a rubber ring installation portion 20b (corresponding to an elastic body installation portion) is provided for installing the rubber ring 30. The inner diameter of the plate hole 20a (here, the opening diameter of the portion where the rubber ring installation portion 20b is formed) is formed to be equal to or greater than the outer diameter of the bolt portion of the mounting bolt 16 (the diameter of the threaded hole portion 41a of the high nut 41, which will be described later).

[0053] The rubber ring 30 is an annular elastic body made of rubber, and is provided in each of the multiple (12 in this case) plate holes 20a of the base plate 20. The rubber ring 30 is placed on a rubber ring mounting section 20b provided on the base plate 20 and is positioned along the inside of the plate holes 20a. Also, when the seismic isolation device 10 is not installed, a part (upper part) of the rubber ring 30 protrudes above the upper surface of the base plate 20. Because the rubber ring 30 is made of rubber, if it is pressed from above, for example, it will be compressed and expand in the horizontal direction (in this case, the radial direction of the plate holes 20a). For this reason, the rubber ring mounting section 20b is designed so that a gap is formed between the inner diameter of the rubber ring 30 and the bolt portion of the mounting bolt 16 that is screwed into the threaded hole 41a. In other words, the inner diameter of the rubber ring 30 is larger than the outer diameter of the bolt portion of the mounting bolt 16. This allows the rubber ring 30 to deform when compressed by pressure from the flange 14 (seismic isolation device 10). When compressed, the rubber ring 30 is stored (housed) in the rubber ring installation section 20b (described later).

[0054] As shown in Figure 1, the anchoring material 40 comprises a tall nut 41, a threaded rod 43 (anchor bolt), an anchoring plate 44, and nuts 42, 45, and 46.

[0055] The tall nut (also called a long nut) 41 is a nut that is long in the axial direction (here, in the vertical direction) and has a threaded hole 41a (corresponding to a joining hole) that penetrates vertically. The threaded hole 41a has an internal thread on its inner circumference. The tall nut 41 is joined to the base plate 20 by welding in a state where it is in contact with the lower surface of the base plate 20, such that the threaded hole 41a and the plate hole 20a of the base plate 20 are in communication.

[0056] On one side (upper side) of the threaded hole 41a, the mounting bolt 16 is screwed (joined) through the flange hole 14a of the lower flange 14 and the plate hole 20a of the base plate 20. As will be described later, when the seismic isolation device 10 (lower flange 14) is installed on the base plate 20, the guide pin 100 (described later) is screwed (joined) into that part.

[0057] Furthermore, a threaded rod 43 is screwed (joined) to the other side (lower side) of the threaded hole 41a.

[0058] The threaded rod 43 is a component for anchoring to the substructure 1 and is embedded in the substructure 1. The threaded rod 43 is a headless threaded rod with male threads formed around its entire length.

[0059] The anchoring plate 44 is a steel plate-like member (steel plate) designed to resist the stress that would otherwise pull the high nut 41 and threaded rod 43 out of the substructure 1 due to vibrations such as earthquakes, and is fixed to the threaded rod 43 at a predetermined position. More specifically, for example, a through hole (not shown) without threads is formed in the center of the anchoring plate 44, and the threaded rod 43 is inserted through this through hole and tightened by nuts 45 and 46, sandwiching the anchoring plate 44 between them. This fixes the anchoring plate 44 to the predetermined position (in this case, the lower end) of the threaded rod 43.

[0060] Nut 42 is a component that prevents the threaded rod 43 from rotating relative to the tall nut 41, and is provided at the lower end of the tall nut 41 (and is screwed onto the threaded rod 43). Nuts 45 and 46 are components that fix the fixing plate 44 to a predetermined position on the threaded rod 43, as described above, and are provided so as to sandwich the fixing plate 44 (and are screwed onto the threaded rod 43).

[0061] The filler material 70 is filled between the substructure 1, located inside the base plate 20 (specifically, within the circular penetration portion 21 of the base plate 20), and the lower flange 14 of the seismic isolation device 10. The filler material 70 is, for example, a non-shrink cement, more specifically, a non-shrink cement that is thixotropic and exhibits high fluidity under pressure. Here, thixotropy refers to the property of not having fluidity in a static state, but becoming fluid when stirred or shaken. Based on this thixotropy, when the filler material 70 is piled up in a mound shape (described later), its spreading to the surroundings is suppressed and its shape is maintained. Furthermore, when pressurized (compressed) by the seismic isolation device 10 (lower flange 14), it becomes fluid and spreads to the surroundings.

[0062] In this embodiment, by providing the rubber ring 30, it is possible to prevent the filler material 70 from flowing into the threaded hole 41a of the tall nut 41 when the filler material 70 expands, as will be described later.

[0063] <<Regarding the installation method of seismic isolation devices>> Figure 3 is a flowchart showing the installation method of the seismic isolation device 10 of this embodiment. It is assumed that the components constituting the anchoring material 40 (high nut 41, threaded rod 43, anchoring plate 44, etc.) have already been assembled. Figures 4A and 4B show the state when the seismic isolation device 10 is installed, respectively. Figure 4A is a cross-sectional view, and Figure 4B is a view of Figure 4A from above, with the seismic isolation device 10 visible through it. Figure 5 is an explanatory diagram showing the sequence of events when the seismic isolation device 10 is pressed downwards.

[0064] First, the fixing material 40 and the rubber ring 30 are attached to the base plate 20 (S101). The fixing material 40 is welded by bringing the upper end of the high nut 41 into contact with the lower surface of the base plate 20 so that the plate hole 20a of the base plate 20 and the threaded hole 41a of the high nut 41 of the fixing material 40 are in communication (see Figure 2C). The rubber ring 30 is then placed on the rubber ring mounting section 20b formed inside the plate hole 20a (see Figure 2B). At this time, a part (upper part) of the rubber ring 30 protrudes above the upper surface of the base plate 20, and a gap (space) is provided between the inner diameter of the rubber ring 30 and the threaded hole 41a (bolt portion of the mounting bolt 16). In other words, the rubber ring mounting section 20b is designed to achieve the above condition.

[0065] Next, the base plate 20 (including the anchoring material 40 and rubber ring 30) is placed on the reinforced substructure (not shown), formwork (not shown) is erected, and concrete is poured into the formwork to form the substructure 1 (S102). At this time, a portion of the base plate 20 in the thickness direction (lower part) and the anchoring material 40 are embedded in the substructure 1.

[0066] Next, as preparation for the installation of the seismic isolation device 10, a guide pin 100 (corresponding to a through-hole) is joined to the threaded hole 41a of the high nut 41 (anchoring material 40) via the corresponding plate hole 20a of the base plate 20 (S103). The guide pin 100 is a component used to align the flange hole 14a of the lower flange 14 with the plate hole 20a of the base plate 20 when installing the seismic isolation device 10. This allows the lower flange 14 (seismic isolation device 10) and the base plate 20 to be aligned. Although not shown in Figure 4, a male thread of the same diameter as the mounting bolt 16 is formed on the outer circumference of the guide pin 100. This guide pin 100 is screwed into the threaded hole 41a of the anchoring material 40 to join it.

[0067] Furthermore, the filler material 70 is applied to the upper surface of the lower structure 1 inside the circular through-hole 21 of the base plate 20 (the inner region surrounded by the base plate 20) in a mound-like shape with the center raised (104). More specifically, it is piled higher than the upper surface of the base plate 20.

[0068] Next, the seismic isolation device 10 is placed on the base plate 20 and the filler material 70 (S105). First, as shown in Figure 4A, the guide pins 100 are inserted through each flange hole 14a of the lower flange 14 of the seismic isolation device 10, and the seismic isolation device 10 is then placed on the substructure 1 (in this case, on the filler material 70) and pressed downwards. At this time, as described above, because the filler material 70 is piled higher than the upper surface of the base plate 20, the filler material 70 is pressed by the seismic isolation device 10 (lower flange 14) and spreads outwards from the center, as shown in Figures 4B and 5. In this way, the seismic isolation device 10 (lower flange 14) can crush (spread) the filler material 70, thereby filling the space between the lower flange 14 and the substructure 1 with the filler material 70.

[0069] Here, if the rubber ring 30 were not provided, the expanded filler material 70 could flow into the threaded hole 41a of the high nut 41, potentially causing problems. For example, it could become an obstacle when screwing the mounting bolt 16 into the threaded hole 41a. Also, if the filler material 70 enters the threaded hole 41a, it may not be able to come out of the lower flange 14, making it impossible to confirm that the filler is properly filled.

[0070] In contrast, in this embodiment, the rubber ring 30 is provided to prevent the filler material 70 from flowing into the threaded hole 41a of the tall nut 41.

[0071] Specifically, as shown on the left side of Figure 5, when the filler material 70 rises higher than the upper surface of the base plate 20, the portion of the rubber ring 30 that protrudes from the upper surface of the base plate 20 prevents the filler material 70 from flowing into the screw hole 41a.

[0072] Furthermore, when the seismic isolation device 10 (lower flange 14) is pushed further downward, the lower surface of the lower flange 14 and the upper end of the rubber ring 30 come into contact. As a result, the lower flange 14 and the rubber ring 30 are in contact, and the filler material 70 spreads outward around the rubber ring 30. In other words, it does not enter the threaded hole 41a) (this reliably prevents the filler material 70 from flowing into the threaded hole 41a).

[0073] When the seismic isolation device 10 (lower flange 14) is pushed further downward, the rubber ring 30 is compressed by the seismic isolation device 10 (lower flange 14), preventing the filler material 70 from flowing into the screw hole portion 41a, and is stored in the rubber ring installation portion 20b. The filler material 70 between the lower flange 14 and the base plate 20 is pushed outward, and the lower flange 14 is positioned on the base plate 20. This prevents the filler material 70 from flowing into the plate hole portion 20a, while allowing the lower flange 14 and the base plate 20 to come into contact.

[0074] Then, by placing the seismic isolation device 10, it is confirmed that the filling material 70 has leaked out from the entire outer circumference of the seismic isolation device 10 (lower flange 14) (S106). This allows for confirmation that the filling material 70 has been filled.

[0075] After confirming the filling, the guide pin 100 is removed and the mounting bolt 16 is tightened (S107). That is, the bolt portion (male thread) of the mounting bolt 16 is passed through the flange hole 14a formed in the lower flange 14 and the plate hole 20a formed in the base plate 20 and screwed into the threaded hole 41a (female thread) of the fixing material 40. In this way, the lower flange 14 and the fixing material 40 are joined via the base plate 20. In other words, the lower flange 14, base plate 20 and fixing material 40 can be fastened together as a single unit.

[0076] As described above, in this embodiment, the rubber ring 30 provided on the inside of the plate hole 20a of the base plate 20 (rubber ring installation portion 20b) is compressed by the seismic isolation device 10 (lower flange 14) while preventing the filler material 70 from flowing into the screw hole 41a of the anchoring material 40. This makes it possible to suppress problems caused by the filler material 70 flowing into the screw hole 41a when the seismic isolation device 10 (lower flange 14) is placed on the base plate 20.

[0077] ===Literal translation=== Figures 6A to 6G show modified configurations of the base plate 20, rubber ring 30, and fixing material 40. In these modified configurations, components that are the same as those in the previously described embodiment are denoted by the same reference numerals even if their shapes are different.

[0078] In the modified examples shown in Figures 6A to 6G, the diameter of the plate hole 20a of the base plate 20 is constant from top to bottom, and the rubber ring 30 is provided on the side of the fixing material 40 (hereinafter described as the high nut 41). In other words, in the modified examples, the high nut 41 is provided with a rubber ring mounting portion (hereinafter referred to as the rubber ring mounting portion 41b).

[0079] In the modified example shown in Figure 6A, the base plate 20 and the tall nut 41 are welded (joined) together with the upper surface of the tall nut 41 in contact with the lower surface of the base plate 20. A concave rubber ring mounting portion 41b is provided on the upper surface (upper end face) of the tall nut 41 inside the plate hole 20a. In other words, in this modified example, the rubber ring mounting portion 41b is formed at the same height as the lower surface of the base plate 20. In this example, since it is not necessary to fit or screw the fixing material 40 into the plate hole 20a, the structure of the joint between the fixing material 40 and the base plate 20 can be simplified.

[0080] In the modified examples shown in Figures 6B to 6G, the tall nut 41 is fitted into the base plate 20 (plate hole 20a). Therefore, the rubber ring mounting portion 41b is formed at a height higher than the lower surface of the base plate 20 and lower than the upper surface of the base plate 20.

[0081] In the modified example shown in Figure 6B, the tall nut 41 is provided with a rubber ring mounting portion 41b, a mating portion 41c, and a locking portion 41d.

[0082] In this example, the rubber ring mounting portion 41b has a shape with a protrusion 41e on the inside of the rubber ring 30, and the upper end of the protrusion 41e is at approximately the same position as the upper surface of the base plate 20. As described above, the rubber ring mounting portion 41b is formed to be higher than the lower surface of the base plate 20 and lower than the upper surface of the base plate 20. When the rubber ring 30 is compressed, it is stored (housed) between the inner circumferential surface of the plate hole portion 20a and the protrusion 41e.

[0083] The mating portion 41c (corresponding to the overlapping portion) is the part that mats with the plate hole portion 20a and overlaps with the base plate 20 in the vertical direction. The mating portion 41c is formed so that it can mate according to the shape and size of the plate hole portion 20a.

[0084] The locking portion 41d is an extended portion at the lower end of the mating portion 41c, extending outward from the mating portion 41c. When the mating portion 41c is inserted through the plate hole portion 20a, the locking portion 41d abuts against the lower part of the plate hole portion 20a of the base plate 20, thereby locking the plate hole portion 20a.

[0085] Then, with the mating portion 41c mating with the plate hole portion 20a and the locking portion 41d in contact with the base plate 20 (the lower part of the plate hole portion 20a) (as shown in Figure 6B), the base plate 20 and the tall nut 41 are welded together.

[0086] This configuration improves the jointability between the base plate 20 and the fixing material 40. Furthermore, the height of the rubber ring 30 can be made smaller (lower) than the thickness of the base plate 20. Also, the presence of the locking portion 41d makes it easier to join the fixing material 40 and the base plate 20 in a mated state. Additionally, the presence of the protrusion 41e allows the upper end of the high nut 41 (threaded hole portion 41a) to be brought closer to the upper surface of the base plate 20 (in other words, the lower flange 14) compared to the case without the protrusion 41e (Figure 6C, described later), thereby increasing the screw length.

[0087] In Figure 6B, the rubber ring 30 is positioned on the inner circumferential surface side of the plate hole 20a, and a gap is provided between the rubber ring 30 and the protrusion 41e, but this is not limited to this configuration. For example, the inside of the rubber ring 30 may be positioned in contact with the side surface of the protrusion 41e, and a gap may be provided between the outside of the rubber ring 30 and the plate hole 20a. In this case as well, when compressed, the rubber ring 30 will be stored (housed) between the inner circumferential surface of the plate hole 20a and the protrusion 41e.

[0088] In the modified example shown in Figure 6C, the tall nut 41 does not have the inner protrusion 41e of the rubber ring mounting portion 41b as shown in Figure 6B (the upper end of the tall nut 41 is at the same height as the rubber ring mounting portion 41b). Therefore, the upper ends of the tall nut 41 and the screw hole portion 41a are at the same height as the rubber ring mounting portion 41b (higher than the lower surface of the base plate 20 and lower than the upper surface of the base plate 20). Everything else is the same as in Figure 6B, so the explanation is omitted.

[0089] The modified example in Figure 6D is a configuration in which the locking portion 41d is not provided, compared to the modified example in Figure 6C. That is, the tall nut 41 in the modified example in Figure 6D has a constant diameter, and its upper part (fitting portion 41c) is fitted into the plate hole 20a of the base plate 20 and joined by welding. The rest is the same as in Figure 6C, so the explanation is omitted.

[0090] The modified example in Figure 6E is a configuration in which the locking portion 41d is not provided, compared to the modified example in Figure 6B. Otherwise, it is the same as in Figure 6B, so the explanation is omitted.

[0091] In the modified version shown in Figure 6F, the upper end of the high nut 41 (here, the upper end of the protrusion 41e) is formed to be higher than the rubber ring mounting portion 41b (the lower end of the rubber ring 30) and lower than the upper surface of the base plate 20. In this case, when the rubber ring 30 is compressed by pressure from the seismic isolation device 10 (lower flange 14), it is stored (housed) in the gap between the upper end of the protrusion 41e and the upper surface of the base plate 20 (the lower surface of the lower flange 14). Therefore, as shown in Figure 6B, there is no need to provide a gap between the inside of the rubber ring 30 and the protrusion 41e (or between the outside of the rubber ring 30 and the inner circumferential surface of the base plate 20).

[0092] The modified example in Figure 6G is a configuration in which the locking portion 41d is not provided, compared to the modified example in Figure 6F. Otherwise, it is the same as in Figure 6F, so the explanation is omitted.

[0093] In Figures 6B to 6G, the tall nut 41 and the base plate 20 are fitted together, but this is not the only option. For example, a male thread may be formed on the outer circumference of the upper part of the tall nut 41, and a female thread may be formed on the inner circumference of the plate hole 20a, and they may be screwed together.

[0094] ===Regarding other embodiments=== The above embodiments are provided to facilitate understanding of the present invention and are not intended to limit its interpretation. The present invention can be modified and improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof.

[0095] In the above-described embodiment, the screw hole portion 41a was formed to penetrate the tall nut 41, but this is not limited to this. For example, the screw hole portion may be separated at the upper and lower parts of the tall nut 41.

[0096] In the embodiment described above, the threaded rod 43 had male threads along its entire length, but this is not limited to this. For example, male threads may be formed only at both ends of the threaded rod 43. Specifically, one end of the threaded rod 43 may have male threads for the length of the threaded connection between the tall nut 41 and the nut 42, and the other end may have male threads for securing the fixing plate 44 by sandwiching it between nuts 45 and 46, including the excess length (the portion protruding downward from nut 46). In other words, male threads may not be formed in the portion of the threaded rod 43 between nuts 42 and 45.

[0097] In the above embodiment, a rubber ring 30 was used to prevent the filler material 70 from flowing into the screw hole 41a, but it is not limited to rubber, and other elastic materials may be used. For example, a material such as sponge may be used. In the case of the rubber ring 30 (rubber), it expanded laterally when compressed (its volume did not change), whereas in the case of sponge, its volume changed (it became smaller) when compressed. Therefore, in the case of sponge, it is not necessary to provide a portion (space) that is stored when compressed. [Explanation of Symbols]

[0098] 1 Substructure 10 Seismic isolation devices 12 Laminated rubber 13 Upper flange 13a Flange hole 14 Lower flange (upper member) 14a Flange hole (upper member hole) 16. Mounting bolts (connecting material) 20 Base Plate (Plate) 20a Plate hole 20b Rubber ring installation section 21 Circular through section 30 Rubber rings (elastic material) 40 Fixing agent 41 High Nut 41a Threaded hole (connecting hole) 41b Rubber ring installation section 41c Engagement part (overlapping part) 41d Locking part 41e protrusion 42 nuts 43 threaded rod 44 Fixing plate 45, 46 nuts 70 Filling material 100 pull-in pins (through-hole material)

Claims

1. Substructure and A plate having a plate hole that penetrates in the thickness direction, and which is installed on the upper surface of the lower structure, An upper member installed on the aforementioned plate, A filler material is provided to fill the space between the lower structure and the upper member inside the plate, A fixing material embedded in the lower structure, comprising a joining hole having an internal thread, and fixed to the plate such that the plate hole and the joining hole are in communication, An annular elastic body placed on the elastic body mounting portion inside the plate hole, Equipped with, The elastic body is compressed by the pressure of the upper member, preventing the filler material from flowing into the joining hole. An installation structure for the upper member characterized by the above.

2. The installation structure for the upper member according to claim 1, A through member is joined to the aforementioned joining hole and penetrates the plate hole and the upper member hole formed in the upper member, An installation structure for the upper member characterized by the above.

3. The installation structure for the upper member according to claim 1, The joining material is joined to the joining hole and penetrates the plate hole and the upper member hole formed in the upper member, thereby joining the upper member and the fixing material. An installation structure for the upper member characterized by the above.

4. The installation structure for the upper member according to claim 3, The inner diameter of the elastic body is larger than the outer diameter of the joint portion of the joining material with the fixing material. An installation structure for the upper member characterized by the above.

5. The installation structure for the upper member according to claim 1, The elastic body is compressed by the pressure of the upper member and stored in the elastic body installation section. An installation structure for the upper member characterized by the above.

6. The installation structure for the upper member according to claim 1, Before the elastic body is compressed by the upper member, a portion of the elastic body protrudes above the upper surface of the plate. An installation structure for the upper member characterized by the above.

7. The installation structure for the upper member according to claim 1, Before the elastic body is compressed by the upper member, the filler is piled higher than the upper surface of the plate. An installation structure for the upper member characterized by the above.

8. The installation structure for the upper member according to claim 1, The fixing material is fixed in contact with the lower part of the plate hole, The elastic body mounting portion is formed at the same height as the lower surface of the plate. An installation structure for the upper member characterized by the above.

9. The installation structure for the upper member according to claim 1, The fixing material is fitted or screwed into the hole in the plate and fixed in place. The elastic body mounting portion is formed at a height higher than the lower surface of the plate and lower than the upper surface of the plate. An installation structure for the upper member characterized by the above.

10. The installation structure for the upper member according to claim 1, The aforementioned fixing material is The overlapping portion overlaps the plate by fitting or screwing into the plate hole, A locking portion extends to the outside of the overlapping portion, abuts against the lower part of the plate hole, and locks the plate hole; An installation structure for an upper member characterized by having the following.

11. An installation structure for an upper member according to claim 9 or 10, The fixing material has a protrusion on the inside of the elastic body that protrudes above the elastic body mounting portion. An installation structure for the upper member characterized by the above.

12. An installation structure for the upper member according to claim 11, Before the elastic body is compressed by the upper member, a gap is formed between the inside of the elastic body and the protrusion, or between the outside of the elastic body and the inner circumferential surface of the plate hole. An installation structure for the upper member characterized by the above.

13. An installation structure for the upper member according to claim 11, The upper end of the protrusion is lower than the upper surface of the plate. An installation structure for the upper member characterized by the above.

14. A fixing material bonding step involves fixing a fixing material having a joining hole with an internal thread to a plate having a plate hole that penetrates in the thickness direction, such that the plate hole and the joining hole are in communication. An elastic body placement step involves placing an annular elastic body on the elastic body placement portion inside the plate hole, A substructure formation step involves casting the substructure and embedding the anchoring material into the substructure, A filler application step is performed in which a filler is piled higher than the upper surface of the plate on the lower structure, inside the area surrounded by the plate, An upper member installation step involves placing the upper member on the plate and filling the space between the upper member and the lower structure with the filler material. The elastic body is compressed by the pressure of the upper member during the upper member installation process, thereby preventing the filler material from flowing into the joining hole. A method for installing an upper member, characterized by the features described above.

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