Friction material, sliding seismic isolation device, and friction material attachment method

Abstract

To provide a friction material, a sliding seismic isolation device and a method for attaching the friction material that are able to reduce costs while preventing a decline in lubricity.SOLUTION: The invention provides a friction material F used in a sliding seismic isolation device 100 which includes: a spherical seat 10 having a first sliding surface S1; a slider 20 having a second sliding surface S2 in sliding contact with the first sliding surface S1. The friction material F contains fibers, and is arranged on the first sliding surface S1 in an at least partly stretched state.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a friction material, a sliding seismic isolation device, and a method for attaching the friction material. [Background technology]

[0002] Sliding seismic isolation devices are sometimes used to suppress the transmission of earthquake vibrations to buildings. For example, Patent Document 1 discloses a structure in which a friction material and an oil passage for applying grease to the sliding surface are provided on the sliding surface of a sliding seismic isolation device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6723426 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional structure, the oil passage is provided, and then the friction material is attached. For this reason, the conventional structure has a problem in terms of cost due to the provision of the oil passage. Also, the conventional structure has a problem in that the friction material deforms and bites into the oil passage during use of the sliding seismic isolation device, reducing the lubricity of the friction material.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a technology that suppresses the decrease in lubricity while reducing costs. [Means for solving the problem]

[0006] A friction material according to one embodiment of the present disclosure is a friction material provided in a sliding seismic isolation device having a ball seat portion with a first sliding surface and a slider with a second sliding surface that slides against the first sliding surface, wherein the friction material is disposed on at least one of the first sliding surface and the second sliding surface in at least a partially stretched state, covers the entire surface of the sliding surface on which the friction material is disposed, and has a folding portion provided on an edge of the sliding surface on which the friction material is disposed and bent outward from the sliding surface on which the friction material is disposed, and the folding portion is in close contact with the edge. Effect of the Invention

[0007] According to the present invention, it is possible to provide a technique for suppressing the decrease in lubricity while suppressing costs. [Brief description of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view showing the configuration of a sliding seismic isolation device according to an embodiment. [Diagram 2] 2 is a diagram showing a state in which a ball seat portion and a shoe have moved relatively in a substantially horizontal direction in the sliding seismic isolation device shown in FIG. 1. FIG. [Diagram 3] This is an example in which the friction material is attached to the ball seat portion. [Figure 4] This is an example in which the friction material is attached to the slider. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a friction material F according to one embodiment of the present invention will be described with reference to the drawings. The friction material F according to this embodiment is provided in a sliding seismic isolation device 100. First, the sliding seismic isolation device 100 will be described below.

[0010] (Regarding the sliding seismic isolation device 100) FIG. 1 is a cross-sectional view showing the configuration of a sliding seismic isolation device 100 according to this embodiment. A sliding seismic isolation device 100 shown in FIG. 1 is provided between an upper structure U, which is a building such as a high-rise building or a bridge, and a lower structure L, which is a foundation structure installed on the ground. The sliding seismic isolation device 100 prevents vibrations on the side of the lower structure L from being transmitted to the upper structure U when an earthquake occurs at the location where the upper structure U is installed. The sliding seismic isolation device 100 shown in FIG. 1 is a spherical sliding bearing, and includes a ball seat portion 10, a slider 20, a shoe 30, and a friction material F.

[0011] The ball seat portion 10 is disposed on the upper portion of the lower structure L. The ball seat portion 10 has a first sliding surface S1. The first sliding surface S1 is a convex spherical sliding surface provided above the ball seat portion 10. The first sliding surface S1 comes into sliding contact with a second sliding surface S2 of the slider 20, which will be described later. The slider 20 is disposed on the ball seat portion 10 . The slider 20 includes a second sliding surface S2 and a third sliding surface S3. The second sliding surface S2 is a sliding surface provided below the slider 20 and has a concave recessed shape. The second sliding surface S2 is in sliding contact with the first sliding surface S1. In this embodiment, the first sliding surface S1 and the second sliding surface S2 being in sliding contact with each other includes a state in which a friction material F is disposed between the first sliding surface S1 and the second sliding surface S2. The slider 20 is sized to be rotatable relative to the ball seat portion 10 . The third sliding surface S3 is a sliding surface provided above the slider 20 and has a convex spherical shape. The third sliding surface S3 comes into sliding contact with a fourth sliding surface S4 of the shoe 30, which will be described later.

[0012] The shoe 30 is disposed above the slider 20 and below the upper structure U. The shoe 30 has a fourth sliding surface S4. The fourth sliding surface S4 is a sliding surface provided on the lower part of the shoe 30 and has a concave recessed shape. The fourth sliding surface S4 is in sliding contact with the third sliding surface S3. In this embodiment, the third sliding surface S3 and the fourth sliding surface S4 being in sliding contact with each other includes a state in which a friction material F is disposed between the third sliding surface S3 and the fourth sliding surface S4.

[0013] In this embodiment, the ball seat portion 10, the slider 20, and the shoe 30 are made of, for example, ordinary steel or stainless steel. In the sliding seismic isolation device 100 having the above-mentioned configurations, for example, when an earthquake occurs at the installation location of the sliding seismic isolation device 100, the first sliding surface S1 and the second sliding surface S2 slide against each other, and the third sliding surface S3 and the fourth sliding surface S4 slide against each other.

[0014] FIG. 2 is a diagram showing a state in which the ball seat portion 10 and the shoe 30 have moved relatively in a substantially horizontal direction in the sliding seismic isolation device 100 shown in FIG. As shown in FIG. 2, the sliding seismic isolation device 100 suppresses the vibration of the lower structure L side from being transmitted to the upper structure U by the upper structure U and the lower structure L moving relatively in a substantially horizontal direction.

[0015] (About friction material F) The friction material F according to this embodiment is disposed between the first sliding surface S1 and the second sliding surface S2, for example, as shown in FIG. The friction material F may be disposed between the third sliding surface S3 and the fourth sliding surface S4. Hereinafter, the friction material F disposed between the first sliding surface S1 and the second sliding surface S2 will be described, but the same applies to the friction material F disposed between the third sliding surface S3 and the fourth sliding surface S4.

[0016] The friction material F is disposed between the first sliding surface S1 and the second sliding surface S2 to provide lubrication. For this reason, in the sliding seismic isolation device 100 according to this embodiment, it is preferable not to use lubricating oil such as grease. Therefore, in this embodiment, it is preferable that no grooves (oil passages) for replenishing lubricating oil during use are provided on the surfaces of the first sliding surface S1 and the second sliding surface S2. This makes it preferable to prevent the friction material F from deforming so as to bite into the grooves while the sliding seismic isolation device 100 is in use, and to prevent a decrease in lubrication due to deformation.

[0017] In this embodiment, the friction material F includes fibers. In other words, the friction material F is formed from fibers. Here, the material of the friction material F is, for example, PTFE (polytetrafluoroethylene). The friction material F is formed, for example, of a double woven fabric. The double woven fabric is formed, for example, of PTFE fiber and fiber (high strength fiber) having a higher tensile strength than the PTFE fiber. Here, examples of "fibers with higher tensile strength than PTFE fibers" include polyamides such as nylon 6·6, nylon 6, and nylon 4·6, polyesters such as polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and para-aramid fibers. Other examples include fibers of meta-aramid, polyethylene, polypropylene, glass, carbon, polyphenylene sulfide (PPS), LCP, polyimide, PEEK, etc. Also, fibers such as heat-sealing fibers, cotton, and wool may be used. Among these, PPS fibers are preferred because they have excellent chemical resistance, hydrolysis resistance, and extremely high tensile strength. The friction material F may be a fabric containing PTFE fibers other than the double woven fabric. The friction material F may be made solely of PTFE. The friction material F may be made of a composite material of PTFE and other resins. The friction material F may have a laminated structure of a friction material made of PTFE and a friction material made of another resin.

[0018] Fig. 3 is a diagram showing an example in which a friction material F is attached to the ball seat portion 10. The friction material F shown in Fig. 3 is attached to the first sliding surface S1, and is thereby disposed between the first sliding surface S1 and the second sliding surface S2.

[0019] FIG. 4 is a diagram showing an example in which the friction material F is attached to the slider 20. As shown in FIG. The friction material F shown in FIG. 4 is attached to the second sliding surface S2, and is thereby disposed between the first sliding surface S1 and the second sliding surface S2.

[0020] However, the present invention is not limited to the examples shown in FIGS. The friction material F may be attached to both the first sliding surface S1 and the second sliding surface S2. When the friction material F is attached to either the first sliding surface S1 or the second sliding surface S2, it is preferable that the one of the first sliding surface S1 and the second sliding surface S2 to which the friction material F is not attached is mirror-finished. The cases where the friction material F is attached to the first sliding surface S1 and the second sliding surface S2 will be described below.

[0021] (When the friction material F is attached to the first sliding surface S1) When the friction material F is attached to the first sliding surface S1, the friction material F has, for example, a three-dimensional shape that fits the shape of the first sliding surface S1. The three-dimensional shape of the friction material F is formed by pressing the woven fabric that forms the friction material F against the first sliding surface S1. In this case, the friction material F is disposed on the first sliding surface S1 in a state where at least a part of the friction material F is stretched. The friction material F is disposed on the first sliding surface S1 in a state where at least a part of it is stretched, so that the area of ​​the friction material F is increased compared to the original state.

[0022] The three-dimensional shape of the friction material F is formed, for example, by pressing the friction material F against the first sliding surface S1 with a jig J as shown in FIG. The jig J is, for example, a rubber body having a three-dimensional shape along the first sliding surface S1. In the case where the friction material F is elastically deformed, when the jig J is removed, the friction material F undergoes restoration deformation and returns to its original shape. For this reason, it is preferable that the friction material F is adhered to the first sliding surface S1 by an adhesive G (details will be described later). However, the present invention is not limited to this, and the three-dimensional shape of the friction material F may be formed by sewing the woven fabric that forms the friction material F three-dimensionally to match the shape of the first sliding surface S1.

[0023] Moreover, it is preferable that the friction material F arranged on the first sliding surface S1 covers the entire surface of the first sliding surface S1 and is wider than the first sliding surface S1. This can prevent the friction material from curling up.

[0024] 3, the friction material F arranged on the first sliding surface S1 is preferably provided on the edge of the first sliding surface S1 with a bent portion Fb that is bent toward the ball seat portion 10. By providing the bent portion Fb, for example, it is possible to more effectively prevent the friction material F from being turned over. When the friction material F is attached to the first sliding surface S1, an adhesive material G is disposed between the first sliding surface S1 and the friction material F, for example, as shown in FIG. In other words, the friction material F is adhered to, for example, the first sliding surface S1. For the adhesive G, a thermosetting resin (for example, an epoxy-based resin) is preferably used. Thermosetting resins (for example, epoxy resins) can increase adhesive strength.

[0025] (When the friction material F is attached to the second sliding surface S2) When the friction material F is attached to the second sliding surface S2, the friction material F has, for example, a three-dimensional shape that fits the shape of the second sliding surface S2. The three-dimensional shape of the friction material F is formed by pressing the woven fabric that forms the friction material F against the second sliding surface S2. In this case, the friction material F is disposed on the second sliding surface S2 in a state where at least a part of the friction material F is stretched. The friction material F is disposed on the second sliding surface S2 in a state where at least a part of it is stretched, so that the area of ​​the friction material F is increased compared to the original state.

[0026] The three-dimensional shape of the friction material F is formed, for example, by pressing the friction material F against the second sliding surface S2 with a jig J as shown in FIG. The jig J is, for example, a rubber body having a three-dimensional shape along the second sliding surface S2. In the case where the friction material F is elastically deformed, when the jig J is removed, the friction material F undergoes restoration deformation and returns to its original shape. For this reason, it is preferable that the friction material F is adhered to the second sliding surface S2 by an adhesive G (details will be described later). However, the present invention is not limited to this, and the three-dimensional shape of the friction material F may be formed by sewing the woven fabric that forms the friction material F three-dimensionally to match the shape of the second sliding surface S2.

[0027] Moreover, it is preferable that the friction material F arranged on the second sliding surface S2 covers the entire surface of the second sliding surface S2 and is wider than the second sliding surface S2. This can prevent the friction material from curling up.

[0028] 4, the friction material F arranged on the second sliding surface S2 is preferably provided on the edge of the second sliding surface S2 with a bent portion Fb that is bent toward the slider 20. By providing the bent portion Fb, for example, it is possible to more effectively prevent the friction material F from being turned over. When the friction material F is attached to the second sliding surface S2, an adhesive material G is disposed between the second sliding surface S2 and the friction material F, for example, as shown in FIG. In other words, the friction material F is, for example, adhered to the second sliding surface S2. For the adhesive G, a thermosetting resin (for example, an epoxy-based resin) is preferably used. Thermosetting resins (for example, epoxy resins) can increase adhesive strength.

[0029] (Method of applying friction material F) Next, a method for attaching the friction material F according to this embodiment will be described. As mentioned above, the ball seat 10 is made of, for example, ordinary steel or stainless steel. The process of attaching the friction material F to the first sliding surface S1 of the ball seat portion 10 will be described below separately for the case where the ball seat portion 10 is made of ordinary steel and the case where the ball seat portion 10 is made of stainless steel. The method of attaching the friction material F to the second sliding surface S2, the third sliding surface S3, and the fourth sliding surface S4 is the same as that of attaching the friction material F to the first sliding surface S1 of the ball seat portion 10.

[0030] (When the ball seat portion 10 is made of ordinary steel) When the ball seat portion 10 is made of ordinary steel, the method of attaching the friction material F includes a blasting process, a painting process, and an attaching process. The blasting process is a process of blasting the first sliding surface S1 before the friction material F is disposed on the first sliding surface S1. Here, as described above, since no grooves (oil passages) are provided on the first sliding surface S1, the abrasives used in the blasting process do not accumulate in the grooves, and there is no need to remove the abrasives. The painting step is a step of painting the first sliding surface S1 after the blasting step to form a painted surface. In the painting step, the paint applied to the first sliding surface S1 preferably has high anticorrosive properties, and for example, paint containing zinc is preferably used. Here, the paint containing zinc is so-called zinc-rich paint. Zinc rich paints include organic zinc rich paints and inorganic zinc rich paints. The attaching step is a step of attaching the friction material F to the first sliding surface S1. In the attaching step, first, the adhesive G is placed on the first sliding surface S1. Next, the friction material F is pressed against the first sliding surface S1 by the jig J. At this time, first, the end portion of the friction material F is fixed to the outside of the ball seat portion 10. The friction material F is pressed against the first sliding surface S1 by the jig J, so that the friction material F assumes a three-dimensional shape conforming to the first sliding surface S1 and is attached to the first sliding surface S1. After the friction material F is attached in this manner, it is preferable to fold the friction material F at the edge of the first sliding surface S1 to form a folded portion Fb. Through the above steps, the friction material F is attached to the first sliding surface S1.

[0031] (When the ball seat portion 10 is made of stainless steel) When the ball seat portion 10 is made of stainless steel, the method for attaching the friction material F includes a preliminary treatment step and an attachment step. The preliminary treatment step is a step for roughening the surface of the first sliding surface S1 on which the friction material F is to be placed, before the friction material F is placed on the first sliding surface S1. The pretreatment carried out in the pretreatment step is, for example, a blast treatment. Here, since no grooves (oil passages) are provided on the first sliding surface S1, the abrasives used in the blasting process do not accumulate in the grooves, and there is no need to remove the abrasives. The attaching step is a step of attaching the friction material F to the first sliding surface S1. The attachment process is the same as when the ball seat portion 10 is made of ordinary steel. Through the above steps, the friction material F is attached to the first sliding surface S1.

[0032] As described above, in the sliding seismic isolation device 100 according to this embodiment, the friction material F provided on the first sliding surface S1 that comes into sliding contact with the second sliding surface S2 is disposed in a state in which at least a portion of it is stretched. That is, the friction material F is arranged in a deformed state along the surface of the first sliding surface S1 by being pressed against the first sliding surface S1 or the like. This allows the friction material F to be disposed in a state of intimate contact with the first sliding surface S1. This prevents a gap from occurring between the friction material F and the first sliding surface S1, or prevents misalignment between the friction material F and the first sliding surface S1, thereby providing sufficient lubrication between the first sliding surface S1 and the second sliding surface S2. Therefore, it is possible to eliminate the need for an oil passage for supplying a lubricant to the first sliding surface S1 or the second sliding surface S2. Therefore, the cost of the sliding seismic isolation device 100 can be reduced.

[0033] Alternatively, the friction material F has a three-dimensional shape that fits the shape of the first sliding surface S1. This allows the friction material F to be disposed in a state of intimate contact with the first sliding surface S1. This prevents a gap from occurring between the friction material F and the first sliding surface S1, or prevents misalignment between the friction material F and the first sliding surface S1, thereby providing sufficient lubrication between the first sliding surface S1 and the second sliding surface S2. Therefore, it is possible to eliminate the need for an oil passage for supplying a lubricant to the first sliding surface S1 or the second sliding surface S2. Therefore, the cost of the sliding seismic isolation device 100 can be reduced.

[0034] Moreover, it is preferable that the friction material F covers the entire surface of the first sliding surface S1 and is wider than the first sliding surface S1. This can prevent the friction material F from curling up.

[0035] Moreover, the friction material F preferably has a bent portion Fb. The bent portion Fb is provided at the edge of the first sliding surface S1 on which the friction material F is provided. The bent portion Fb is a portion that is bent toward the ball seat portion 10 side. This makes it possible to more effectively prevent the friction material F from curling up.

[0036] In the sliding seismic isolation device 100, the friction material F provided on the second sliding surface S2 that comes into sliding contact with the first sliding surface S1 is disposed in a state in which at least a portion of it is stretched. That is, the friction material F is arranged in a deformed state along the surface of the second sliding surface S2 by being pressed against the second sliding surface S2 or the like. This allows the friction material F to be disposed in a state of being in close contact with the second sliding surface S2. This prevents a gap from occurring between the friction material F and the second sliding surface S2, or prevents a shift from occurring between the friction material F and the second sliding surface S2, thereby providing sufficient lubrication between the first sliding surface S1 and the second sliding surface S2. Therefore, it is possible to eliminate the need for an oil passage for supplying a lubricant to the first sliding surface S1 or the second sliding surface S2. Therefore, for example, the cost of the sliding seismic isolation device 100 can be reduced. Furthermore, by providing the friction material F to the slider 20 of the sliding seismic isolation device 100, the slider 20 can be removed from the sliding seismic isolation device 100 when replacing the friction material F. Therefore, the friction material F can be easily replaced.

[0037] Moreover, the sliding seismic isolation device 100 according to this embodiment includes the friction material F described above. This makes it possible to provide sufficient lubrication between the first sliding surface S1 and the second sliding surface S2. Therefore, it is possible to eliminate the need for an oil passage for supplying a lubricant to the first sliding surface S1 or the second sliding surface S2. Therefore, the cost of the sliding seismic isolation device 100 can be reduced.

[0038] In addition, an adhesive G is disposed between the first sliding surface S1 and the friction material F. This allows the friction material F to be more reliably and firmly attached to the first sliding surface S1.

[0039] In addition, in the method for applying the friction material F according to this embodiment, the friction material F is pressed against the first sliding surface S1, so that a three-dimensional shape is formed along the first sliding surface S1, and then the friction material F is applied to the first sliding surface S1. This allows the friction material F to be disposed in a state of intimate contact with the first sliding surface S1. This prevents a gap from occurring between the friction material F and the first sliding surface S1, or prevents misalignment between the friction material F and the first sliding surface S1, thereby providing sufficient lubrication between the first sliding surface S1 and the second sliding surface S2. Therefore, it is possible to eliminate the need for an oil passage for supplying a lubricant to the first sliding surface S1 or the second sliding surface S2. Therefore, the cost of the sliding seismic isolation device 100 can be reduced.

[0040] In addition, in the method of attaching the friction material F, the three-dimensional shape is formed by pressing the friction material F against the first sliding surface S1 with a jig J. This makes it possible to easily form the three-dimensional shape even if the material forming the friction material F does not have a three-dimensional shape.

[0041] In addition, the jig J is preferably a rubber body having a three-dimensional shape conforming to the first sliding surface S1, so that when the friction material F is pressed against the first sliding surface S1 by the jig J, the jig J can elastically deform to conform to the surface of the first sliding surface S1. Therefore, the friction material F can be evenly pressed against the entire surface of the first sliding surface S1. Therefore, the friction material F can be made to more effectively fit along the first sliding surface S1.

[0042] In addition, it is preferable that an adhesive G is disposed between the first sliding surface S1 and the friction material F. This allows the friction material F to be more reliably and firmly attached to the first sliding surface S1.

[0043] Furthermore, when the ball seat portion 10 is made of ordinary steel, it is preferable to blast the first sliding surface S1 before arranging the friction material F on the first sliding surface S1, and then paint the surface after the blasting to form a painted surface. This makes it possible to improve the adhesion between the friction material F and the first sliding surface S1 when the ball seat portion 10 is made of ordinary steel.

[0044] Furthermore, when the ball seat portion 10 is made of stainless steel, it is preferable to perform a preliminary treatment for roughening the surface of the first sliding surface S1 on which the friction material F is to be disposed, before disposing the friction material F on the first sliding surface S1. This makes it possible to improve the adhesion between the friction material F and the first sliding surface S1 when the ball seat portion 10 is made of stainless steel.

[0045] Furthermore, the preliminary treatment carried out when the ball seat portion 10 is made of stainless steel is, for example, a blast treatment. This makes it possible to improve the adhesion between the friction material F and the first sliding surface S1 when the ball seat portion 10 is made of stainless steel.

[0046] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the sliding seismic isolation device 100 is a spherical sliding bearing of the single pendulum type, but the present invention is not limited to this. That is, the friction material F may be used in any sliding seismic isolation device 100 having a sliding surface. When the friction material F is provided in the sliding seismic isolation device 100, a lubricant such as silicone may be applied to the friction material F in advance. Alternatively, during use of the sliding seismic isolation device 100 provided with the friction material F, additional lubricant may be applied to the friction material F to improve lubrication. In addition, the friction material F may be replaced while the sliding seismic isolation device 100 is in use. In this case, it is preferable to remove the slider 20 from the sliding seismic isolation device 100, remove the old friction material F, and then apply the friction material F by the application method described above. In addition, the first sliding surface S1 provided on the ball seat portion 10 has been described as a sliding surface in the shape of a convex spherical surface, but the present invention is not limited to this. The first sliding surface S1 provided on the ball seat portion 10 may be a sliding surface in the shape of a concave depression. In this case, the second sliding surface S2 of the slider 20 that comes into sliding contact with the first sliding surface S1 may be a sliding surface in the shape of a convex spherical surface.

[0047] In addition, within the scope of the invention, the components in the above-described embodiments may be replaced with well-known components, and the above-described modified examples may be combined as appropriate. [Explanation of symbols]

[0048] 10 Ball seat part 20 Slider 30 Shoes 100 Sliding seismic isolation device F Friction material Fb Bending part G Adhesive J Jig L Substructure S1 1st sliding surface S2 2nd sliding surface S3 3rd sliding surface S4 4th sliding surface U superstructure

Claims

1. A friction material provided in a sliding seismic isolation device having a ball seat portion having a first sliding surface and a slider having a second sliding surface that slides against the first sliding surface, the friction material is disposed on at least one of the first sliding surface and the second sliding surface in a state where at least a part of the friction material is stretched, covers the entire surface of the sliding surface on which the friction material is disposed, and includes a folding portion provided on an edge of the sliding surface on which the friction material is disposed and folding outward from the sliding surface on which the friction material is disposed; The bent portion is in close contact with the edge. A friction material characterized by:

2. A friction material provided in a sliding seismic isolation device having a ball seat portion having a first sliding surface and a slider having a second sliding surface that slides against the first sliding surface, the friction material has a three-dimensional shape that conforms to a shape of an arrangement surface that is at least one of the first sliding surface and the second sliding surface, a folding portion that covers the entire surface of the arrangement surface and is provided on an edge of the arrangement surface and bends outward from the arrangement surface; The bent portion is in close contact with the edge. A friction material characterized by:

3. The friction material according to claim 1 or 2, A ball seat portion having a first sliding surface; A slider having a second sliding surface that is in sliding contact with the first sliding surface. A sliding seismic isolation device characterized by:

4. An adhesive is disposed between the friction material and at least one of the first sliding surface and the second sliding surface.

4. The sliding seismic isolation device according to claim 3.

5. A method for attaching a friction material to a sliding seismic isolation device having a ball seat portion having a first sliding surface and a slider having a second sliding surface that is in sliding contact with the first sliding surface, comprising: a folding portion provided on an edge of a placement surface, which is at least one of the first sliding surface and the second sliding surface, and folding outward from the placement surface; The friction material is pressed against the arrangement surface, In a state where a three-dimensional shape is formed along the arrangement surface, And, in a state where the entire arrangement surface is covered, And, in a state where the bent portion is in close contact with the edge, A method for attaching a friction material, comprising attaching the friction material to the arrangement surface.

6. The three-dimensional shape is formed by pressing the friction material against the arrangement surface with a jig.

6. The method for attaching a friction material according to claim 5.

7. The jig is a rubber body having a three-dimensional shape conforming to the arrangement surface.

7. The method for attaching a friction material according to claim 6.

8. An adhesive is disposed between the placement surface and the friction material.

8. The method for attaching a friction material according to claim 7.

9. The member on which the placement surface is placed is made of ordinary steel, Before disposing the friction material on the disposition surface, the disposition surface is subjected to a blast treatment, and after the blast treatment, the surface is painted to form a painted surface.

9. The method for attaching a friction material according to claim 5, wherein the friction material is adhered to a surface of the friction material.

10. The member on which the placement surface is placed is made of stainless steel; performing a preliminary treatment for roughening the placement surface before placing the friction material on the placement surface; 9. The method for attaching a friction material according to claim 5, wherein the friction material is adhered to a surface of the friction material.

11. The pretreatment is a blast treatment. The method for attaching a friction material according to claim 10.

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