JP4094013B2 - Elastic bearings for structures - Google Patents

Description

  The present invention relates to an elastic bearing for a structure suitable for supporting a bridge, a building, a machine, etc., and more particularly to an elastic bearing for a bridge.

  Conventionally, as shown in FIG. 7, a rubber bearing 91 is disposed between an upper structure 95 such as a bridge and a lower structure 96 such as a bridge pier, and the force acting from the upper structure 95 is lower. This is transmitted to the structure 96 to absorb deflection and torsional deformation caused by the loading of the load of the superstructure. The rubber bearing body 91 includes an upper collar 99 fixed to the upper structure 95, a lower collar 100 fixed to the lower structure 96 by anchor bolts 97, and a rubber layer 98 disposed therebetween. Composed. A downward vertical load is supported by the rubber support 91.

  On the other hand, with respect to horizontal load and vertical upward movement, the upper structure 95 and the lower structure 96 are arranged by, for example, disposing and fixing a side block (movement restriction device) 92 at the side end of the rubber bearing 91. Are restricted in the horizontal and vertical upward movements (for example, Non-Patent Document 1). Patent Document 1 proposes a movement restricting device that restricts horizontal movement of an upper structure.

  However, when the vertical load is supported by the rubber support and the horizontal load is supported by the movement restricting device described in Non-Patent Document 1 or the movement restricting device described in Patent Document 1, the apparatus including the rubber support is included. While the whole becomes larger and heavier, there are problems that the construction becomes complicated and the cost increases. Moreover, when the whole apparatus becomes large, construction may not be possible if the under-girder space is narrow.

  In Patent Document 2 and Non-Patent Document 2, an upper collar having a convex portion, a lower collar having a concave portion, a slip plate, an intermediate plate, and a rubber plate arranged in the concave portion of the lower collar. A sealed rubber bearing body having been proposed has been proposed. In this sealed rubber bearing body, vertical load and horizontal load are absorbed by sliding friction of the sliding plate, intermediate plate and rubber plate, and deformation of the sealed rubber plate, so that the device can be reduced in size and weight. .

  However, in this sealed rubber bearing body, the convex portion of the upper collar is simply fitted into the concave portion of the lower collar, and the upper collar and the lower collar are not bonded and fixed. In order to resist a large vertical load in a separating direction (vertically upward), a movement restriction device such as a lift prevention device is provided in addition to the sealed rubber bearing (for example, Non-Patent Document 3). For this reason, there exists a problem that while the whole apparatus enlarges and weights, construction becomes complicated and a cost increase arises.

  Patent Document 3 proposes another rubber bearing body. A concave portion is formed on the upper surface of the rubber bearing body on the surface facing the lower collar. The lower collar is formed on the surface facing the upper collar and at a position corresponding to the concave portion of the upper collar. And the upper and lower eyelids are fitted via a rubber layer to form one fitting portion. Thereby, in this rubber support body, a vertical load support portion is configured by the upper horizontal plane, the lower horizontal plane facing the horizontal plane, and the rubber layer disposed between these horizontal planes. The horizontal load support portion is constituted by the inner side surface of the concave portion in the fitting portion, the outer side surface of the convex portion facing the side surface, and the rubber layer disposed between the side surfaces. Not only the vertical load but also the horizontal load can be supported only by the support body.

  However, a rubber layer is not disposed or disposed between the horizontal surface (bottom surface) of the concave portion and the horizontal surface (end surface) of the convex portion in the rubber support described in Patent Document 3. However, the rubber layer and the horizontal surface of the recess are not in contact with each other and there is a gap. Accordingly, the movement of the upper end side of the rubber layer in the horizontal load support portion is not limited. For this reason, when a horizontal load is applied to the horizontal load support portion, a swelling phenomenon occurs in which the upper end (free surface) of the rubber layer is pushed out into the gap above. Further, since the movement of the side edge of the rubber layer in the vertical load support portion is not limited, the side end (free surface) of the rubber layer is pushed out to the side when a vertical load is applied to the vertical load support portion. Bulging phenomenon occurs.

When such a bulging phenomenon occurs, the spring constant in the vertical load support portion and the horizontal load support portion decreases, and the vertical load and horizontal load that can be supported per unit area become small. May not be sufficient. Further, as described above, since there is a gap between the horizontal surface of the concave portion and the horizontal surface of the convex portion, a sufficient effect of absorbing a vertical load cannot be expected on these horizontal surfaces. That is, the rubber bearing body can absorb the vertical load only on a horizontal plane other than the fitting portion (horizontal plane around the fitting portion). Accordingly, in order to obtain a sufficient load bearing capacity, it is necessary to enlarge the vertical load support portion and the horizontal load support portion, and there is a problem that the rubber bearing body is enlarged. Moreover, if the area of a horizontal surface is enlarged in order to improve the load bearing capacity with respect to a vertical load, the amount of rotational deflection will increase. When the amount of rotational deflection increases in this way, the compression spring constant of the bearing body decreases, and the problem of traffic vibration becomes more prominent.
JP 2000-96518 A, FIG. JP 61-75105 A JP 59-213808 Edited by the Japan Road Association “Road Bridge Support Manual (First Edition)”, p. 179-180 (Figure 3.89) Edited by the Japan Road Association “Road Bridge Support Manual (First Edition)”, p. 85-86 Edited by the Japan Road Association “Road Bridge Support Manual (First Edition)”, p. 57 (Fig. 2.38)

  An object of the present invention is to provide an elastic bearing body for a structure, in particular an elastic bearing body for a bridge, which can be reduced in size, reduced in weight, simplified in structure, and excellent in supporting performance of vertical load and horizontal load. is there.

The elastic bearing body for a structure of the present invention for solving the above problems has the following configuration.
(1) An elastic support body for a structure comprising an upper frame fixed to an upper structure, a lower frame fixed to a lower structure, and an elastic layer disposed therebetween, The upper frame is formed with a concave portion and / or a convex portion on a surface facing the lower frame, and the lower frame is a surface facing the upper frame and the concave portion and / or convex portion of the upper frame. A convex portion and / or a concave portion that is fitted to these are formed at a position corresponding to the portion, and the upper frame and the lower frame are fitted via the elastic layer, and a plurality of fitting portions are formed. In the fitting portion, the elastic layer is filled so as to be in close contact with the inner surface of the concave portion, the outer surface of the convex portion, and the opposing surfaces of the upper frame and the lower frame including the horizontal surface without any gap. Furthermore, the inner side surface of the concave portion in the fitting portion, the outer side surface of the convex portion facing the side surface, and between these side surfaces A horizontal load bearing portion constituted by a filled elastic layer, and a horizontal plane of the upper frame, and the horizontal surface of the lower frame opposite the horizontal surface, is constituted by an elastic layer filled between these horizontal plane structure elastic bearing body and the vertical load-bearing part is characterized in that it alternately and continuously.

  As described above, since the plurality of fitting portions are formed in the elastic support body for a structure of the present invention, a plurality of horizontal load support portions and a plurality of vertical load supports are provided in the direction in which adjacent fitting portions are arranged. The parts are formed alternately and continuously. As a result, not only the vertical load but also the horizontal load can be supported only by the elastic support body constituted by the upper frame, the lower frame and the elastic layer, and it is necessary to separately provide a member for supporting the horizontal load such as a side block. Therefore, the elastic bearing body can be reduced in size and weight, and the structure of the elastic bearing body can be simplified. In addition, by forming a plurality of fitting parts, the area of the horizontal load support part that resists the horizontal load (area approximately perpendicular to the direction in which the horizontal load is applied) can be increased. You can gain power.

Further, as in ( 1 ) above, in the fitting portion, the elastic layer is substantially between the opposing surfaces of the upper and lower frames including the inner surface of the recess, the outer surface of the protrusion, and a horizontal plane. It is filled so as to be in close contact with no gap, and further includes an inner side surface of the concave portion in the fitting portion, an outer side surface of the convex portion facing the side surface, and an elastic layer filled between the side surfaces. The horizontal load support portion formed, the horizontal plane of the upper frame, the horizontal plane of the lower frame facing the horizontal plane, and the vertical load support portion constituted by an elastic layer filled between the horizontal planes are alternately arranged. It is continuous . Thereby, the movement of the elastic layer of the horizontal load support part is restricted by the elastic layer of the vertical load support part adjacent to the elastic layer, and the elastic layer of the vertical load support part is adjacent to the elastic layer. The movement is restricted by the elastic layer. That is, the elastic layer of the horizontal load support part and the elastic layer of the vertical load support part regulate movement with respect to each other. Therefore, when a horizontal load is applied to the horizontal load support portion, the vertical load support portion adjacent to the horizontal load support portion has an elastic layer of the horizontal load support portion that extends excessively in a direction perpendicular to the horizontal load (elongation). Can be suppressed. In addition, when a vertical load is applied to the vertical load support portion, the horizontal load support portion adjacent to the vertical load support portion prevents the elastic layer of the vertical load support portion from excessively spreading in a direction perpendicular to the vertical load. Can be suppressed. As a result, the spring constants in the vertical load support portion and the horizontal load support portion can be increased to improve the load bearing capacity against the vertical load and the horizontal load, so that the vertical load and the horizontal load that can be supported per unit area are increased. Can do. Therefore, it is possible to reduce the size by reducing the horizontal area. Moreover, the amount of rotational deflection can be reduced by reducing the horizontal area.

The elastic bearing body for a structure of the present invention preferably further comprises the following configuration.
(2) the elastic layer, the inner surface of the recess, for structures of the upper frame and are adhered respectively on the opposing surfaces of the lower frame (1) Symbol mounting including an outer surface and the horizontal surface of the convex portion Elastic bearing body.
( 3 ) One of the upper frame and the lower frame includes a first protrusion on a surface facing the other, a first protrusion separated from the first protrusion, and surrounding the first protrusion 2 convex portions are formed,
The other of the upper frame and the lower frame has a first recess that fits into a surface facing the one and at a position corresponding to the first and second protrusions. And the elastic support for a structure according to (1) or (2) , wherein a second recess is formed.
( 4 ) The elastic support for a structure according to ( 3 ), wherein the first convex portion has a substantially cylindrical shape, and the second convex portion has a substantially cylindrical shape.
(5) in the recess and / or protrusion can be of any notch for adjusting the spring constant of the horizontal load-bearing part and / or the vertical load-bearing part is formed (1) to (4) An elastic bearing body for a structure according to any one of the above.
( 6 ) The upper frame and / or the lower frame are formed with through holes or grooves in the vertical direction for adjusting the spring constant of the horizontal load support part and / or the vertical load support part. ( 5 ) The elastic bearing body for structures according to any one of ( 5 ).

It is preferable that the elastic bearing body for a structure of the present invention is applied to an elastic bearing body for a bridge. This bridge elastic bearing body is an elastic bearing body for bridges having an upper collar fixed to the upper structure, a lower collar fixed to the lower structure, and an elastic layer disposed therebetween. In the upper collar, a recess and / or a protrusion is formed on a surface facing the lower collar, and the lower collar is a surface facing the upper collar and a recess of the upper collar. And / or a convex portion and / or a concave portion that are fitted to these at a position corresponding to the convex portion, the upper collar and the lower collar are fitted via the elastic layer, and a plurality of fitting sections are formed. In the fitting portion, the elastic layer is in close contact with the inner surface of the concave portion, the outer surface of the convex portion, and the opposing surfaces of the upper and lower eyelids including the horizontal surface with substantially no gap. are filled as further, an inner surface of the recess in the fitting portion, the outside of the protruding portion facing the side surface When a horizontal load bearing portion constituted by a filled between these aspects elastic layer, and a horizontal plane of the upper frame, and the horizontal surface of the lower frame opposite the horizontal surface, which is filled between these horizontal plane it characterized in that the elastic layer and the vertical load support configured by being alternately repeated.

According wherein (1) SL in the structure elastic support body mounting, provided with a plurality of fitting portions, since it has an elastic layer on the horizontal load-bearing part and the vertical load-bearing part, smaller, lighter In addition, the structure can be simplified and the supporting performance of vertical load and horizontal load is excellent. Thereby, while being able to aim at cost reduction, construction workability | operativity improves and it can install in the space under a girder. Moreover, traffic vibration can be reduced by increasing the spring constant and reducing the amount of rotational deflection.

According to the elastic support body described in ( 2 ), since the elastic layers are respectively bonded to the opposing surfaces of the upper frame and the lower frame including the inner surface of the concave portion, the outer surface of the convex portion, and each horizontal plane, Even when a large vertical load is generated in a direction in which the upper frame and the lower frame are separated (vertically upward), sufficient resistance can be applied so that the fitting between the upper frame and the lower frame is not released. That is, in the elastic bearing body of the present invention, by forming a plurality of fitting portions, an effect of increasing the adhesion area between the upper frame and the lower frame is obtained, and the elastic layer is not only a horizontal plane but also the fitting portions. Since the concave and convex portions are vulcanized and bonded, the adhesive force between the upper frame and the lower frame and the elastic layer can be remarkably improved.

As a specific example of the elastic bearing body of the present invention, for example, the one described in the above ( 3 ) can be cited. In the elastic support body described in ( 3 ), since the second convex portion surrounding the convex portion is formed around the first convex portion, sufficient load resistance against horizontal loads from all directions is provided. Can give power. In addition, as described in ( 4 ) above, it is preferable that the first convex portion has a substantially cylindrical shape and the second convex portion has a substantially cylindrical shape. Thus, when the cross-sectional shape of each convex part is circular, stress concentration is less likely to occur when a load is applied, and the durability of the elastic bearing body is further improved.

Further, in the elastic support for a structure of the present invention, when the elastic layer is sealed and the spring constant is too large, as described in ( 5 ) and ( 6 ) above, as described in ( 5 ) and ( 6 ), Spring constant by providing a notch on the convex part and / or providing a through hole or groove in the upper frame and / or the lower frame to bulge part of the elastic layer into the notch, through hole or groove Can be adjusted to a desired value.

  Hereinafter, a rubber bearing body for a bridge according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1A is a cross-sectional view showing a rubber support 11 according to the present embodiment, and FIG. 1B is a bottom view showing an upper collar 12 (upper frame) of the rubber bearing 11. FIG. 1 (c) is a plan view showing the lower collar 13 (lower frame) of the rubber bearing body 11. As shown in FIG.

  As shown in FIG. 1 (a), the rubber support 11 includes an upper rod 12 fixed to an upper structure 101 such as a bridge via a sole plate 103, and a lower structure 102 such as a bridge pier via a base plate 104. And a rubber layer 14 disposed between them. The upper structure 101 and the upper collar 12 are fixed by a girder set bolt 105 that penetrates the sole plate 103. In addition, the lower structure 102 and the lower rod 13 are fixed by anchor bolts 106 that penetrate the base plate 104.

  As shown in FIGS. 1B and 1C, the lower collar 13 has a substantially cylindrical first convex portion 13a on the surface facing the upper collar 12, and a distance from the first convex portion 13a. And the substantially cylindrical 2nd convex part 13b surrounding the 1st convex part 13a is formed. On the other hand, the upper flange 12 has a first concave portion 12a and a first concave portion 12a which are fitted to these at positions corresponding to the first convex portion 13a and the second convex portion 13b, on the surface facing the lower rod 13. Two recesses 12b are formed. Then, the upper hook 12 and the lower hook 13 are fitted through the rubber layer 14 to form two fitting portions A and B as shown in FIG.

  The horizontal load support portion H is formed by the inner side surfaces of the concave portions 12a and 12b in the fitting portions A and B, the outer side surfaces of the convex portions 13a and 13b facing the side surfaces, and the rubber layer 14 disposed between the side surfaces. Is configured. Further, a vertical load support portion V is configured by the horizontal surface 12c of the upper rod 12, the horizontal surface 13c of the lower rod 13 facing the horizontal surface 12c, and the rubber layer 14 disposed between the horizontal surfaces 12c and 13c. Further, the horizontal surface (bottom surface of the concave portion) 12d of the concave portion 12a, the horizontal surface (end surface of the convex portion) 13d of the convex portion 13a facing the horizontal surface 12d, and the rubber layer 14 disposed between the horizontal surfaces 12d and 13d A load supporting portion V is configured, and is disposed between the horizontal surfaces 12e and 13e, and the horizontal surface 12e of the concave portion 12b (the bottom surface of the concave portion), the horizontal surface 13e of the convex portion 13b facing the horizontal surface 12e (the end surface of the convex portion). The rubber layer 14 forms a vertical load support portion V.

  And as shown to Fig.1 (a), it is preferable that the horizontal load support part H and the vertical load support part V are filled with the rubber layer 14 densely. Here, “the rubber layer 14 is densely filled” means that the rubber layer 14, the inner surfaces of the recesses 12 a and 12 b, the outer surfaces of the projections 13 a and 13 b, and the horizontal surfaces 12 c, 13 c, 12 d, 13 d, and 12 e , 13e are in close contact with each other substantially without any gap. Thereby, the horizontal load support part H and the vertical load support part V are formed alternately and continuously. Since the rubber layer 14 is in a sealed state in this way, the movement of the rubber layer 14 of the horizontal load support portion H is restricted by the rubber layer 14 of the vertical load support portion V adjacent to the rubber layer 14, and the vertical load The movement of the rubber layer 14 of the support portion V is restricted by the rubber layer 14 of the horizontal load support portion H adjacent to the rubber layer 14. That is, the movement of the rubber layer 14 of the horizontal load support portion H and the rubber layer 14 of the vertical load support portion V are regulated.

  The rubber layer 14 is bonded to the inner surfaces of the recesses 12a and 12b, the outer surfaces of the projections 13a and 13b, and the horizontal surfaces 12c, 13c, 12d, 13d, 12e, and 13e. The rubber layer 14 is blended with a rubber component as a main component such as a vulcanizing agent, a vulcanization accelerator, a vulcanization acceleration aid, an anti-aging agent, a reinforcing agent, a retarder, a plasticizer, and a colorant as required. It is a combination of agents. In particular, the thickness of the rubber layer 14 is about 5 to 50 mm, preferably about 10 to 30 mm.

  As the rubber component, for example, a diene rubber can be used. Examples of the diene rubber include natural rubber and synthetic rubber such as chloroprene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, butadiene rubber, isoprene rubber, butyl rubber, and halogenated butyl rubber. Examples of the vulcanizing agent include sulfur, organic peroxide, zinc white, and magnesia. Examples of the vulcanization acceleration aid include zinc white and stearic acid. Examples of the antioxidant include amine compounds such as phenyl-α-naphthylamine, N, N′-diphenyl-p-phenylenediamine, and N-phenyl-N′-isopropyl-p-phenylenediamine; 2,6-di- and phenolic compounds such as t-butyl-p-cresol and 4,4′-butylidenebis (3-methyl-6-t-butylphenol). Examples of the plasticizer include petroleum-based process oils, tars, pitches, natural fats and oils, animal and vegetable fats and oils, and synthetic plasticizers. Examples of the reinforcing agent include carbon black, silica, and white carbon.

  As the upper collar 12 and the lower collar 13, for example, a metal plate such as a steel plate, ceramics, a hard plastic plate, or the like can be used. The thickness t1 of the upper collar 12 should be about 10 to 150 mm, preferably about 20 to 100 mm, and the thickness t3 of the lower collar 13 should be about 10 to 150 mm, preferably about 20 to 100 mm. Good. The depth t2 of the recesses 12a and 12b should be about 5 to 100 mm, preferably about 20 to 50 mm, and the height t4 of the projections 13a and 13b should be about 5 to 100 mm, preferably 20 to 50 mm. It should be a degree.

  The upper collar 12 and the upper collar 13 can be manufactured by forming a concave portion and / or a convex portion in a material such as a steel plate using a known means such as cutting. Moreover, as another method of forming a convex part, the method of joining separately the material used as a convex part to materials, such as a steel plate, using means, such as welding, for example.

  The rubber support 11 as described above is, for example, a rubber composition in which an upper rod 12 and a lower rod 13 are arranged at predetermined intervals in a mold, and various compounding agents are blended with the rubber component in the mold. Can be manufactured by injecting by injection or the like and integrally vulcanizing and bonding simultaneously with vulcanization molding.

  As another method for producing the rubber support 11, a rubber composition in which various compounding agents are blended with a rubber component is molded by extrusion or the like to prepare a rubber layer having a predetermined thickness in advance, and then the rubber layer And a method of laminating the upper collar 12 and the lower collar 13 and bonding them with an adhesive or the like. Examples of the adhesive include thermoplastic adhesives such as vinyl acetate, acrylic, ethylene copolymer, dope cement, monomer cement, polyamide, polyester, and polyurethane; chloroprene rubber, nitrile rubber, recycled rubber, styrene- Examples thereof include rubber adhesives such as butadiene rubber (SBR) and natural rubber.

<Other embodiments>
FIG. 2 (a) is a bottom view showing an upper collar 12 ′ of a rubber bearing body 11 ′ according to another embodiment of the present invention, and FIG. 2 (b) is a lower collar 13 ′ of the rubber bearing body 11 ′. FIG. Moreover, FIG.2 (c) and FIG.2 (d) are sectional drawings which show rubber bearing body 11 '. 2 (c) is a cross-sectional view of the rubber support 11 ′ cut at the same position as the line XX shown in FIG. 2 (b), and FIG. 2 (d) is shown in FIG. 2 (b). It is the cross section which cut | disconnected rubber bearing body 11 'in the same position as a YY line.

  As shown in FIG. 2 (a), a first recess 12a and a second recess 12b are formed in the upper collar 12 'of the rubber bearing body 11' in the same manner as the rubber bearing body 11, and the lower collar 13 'is formed with a first convex portion 13a and a second convex portion 13b. As shown in FIG. 2C, two fitting portions A and B are formed by fitting the upper collar 12 'and the lower collar 13' via the rubber layer 14.

  And horizontal load support is carried out by the inner surface of the recessed parts 12a and 12b in the fitting parts A and B, the outer surface of the convex parts 13a and 13b facing the side surfaces, and the rubber layer 14 disposed between these side surfaces. Part H is configured. Further, the vertical load support portion V is configured by the horizontal surface 12c of the upper rod 12 ', the horizontal surface 13c of the lower rod 13' facing the horizontal surface 12c, and the rubber layer 14 disposed between the horizontal surfaces 12c and 13c. Yes. Further, the horizontal surface (bottom surface of the concave portion) 12d of the concave portion 12a, the horizontal surface (end surface of the convex portion) 13d of the convex portion 13a facing the horizontal surface 12d, and the rubber layer 14 disposed between the horizontal surfaces 12d and 13d A load supporting portion V is configured, and is disposed between the horizontal surfaces 12e and 13e, and the horizontal surface 12e of the concave portion 12b (the bottom surface of the concave portion), the horizontal surface 13e of the convex portion 13b facing the horizontal surface 12e (the end surface of the convex portion). The rubber layer 14 forms a vertical load support portion V.

  Further, notches 12f and 13f for adjusting the spring constants of the horizontal load support H and the vertical load support V are formed in the recess 12c and the protrusion 13b of the rubber bearing body 11 ', respectively. Further, a through hole 12g for adjusting the spring constants of the horizontal load support portion H and the vertical load support portion V is formed in the upper collar 12 'in the vertical direction. Thereby, a part of rubber layer 14 can be expanded to notches 12f and 13f and penetration opening 12g, and a spring constant can be adjusted to a desired value. The spring constant can be adjusted by changing the size and number of the notches 12f and 13f and the through-hole 12g and the location where they are formed. Therefore, the spring constant of the horizontal load support portion H and the spring constant of the vertical load support portion V in the rubber bearing body 11 ′ are smaller than the spring constant of the rubber bearing body 11 without the notch and the through hole. In addition, when a notch part and a through-hole are provided like this embodiment, a rubber layer may be arrange | positioned in the part of this notch part and a through-hole, and it is not necessary to arrange | position. The other parts are the same as those in FIG.

  FIG. 3 shows a modification of the embodiment shown in FIG. 2, FIG. 3 (a) is a bottom view showing the upper collar 12 of the rubber bearing body 111 according to this modification, and FIG. FIG. 3C is a cross-sectional view showing the rubber bearing body 111, and FIG. 3C is a plan view showing the lower collar 113 of the rubber bearing body 111.

  In the embodiment of FIG. 2, the through hole 12g is provided in the upper collar, whereas in this modification, a plurality of through holes 113g are provided in the lower collar 113 as shown in FIG. That is, the through-hole 113g is perforated in the vertical direction from the horizontal surface 13c (concave bottom) located between the first convex portion 13a and the second convex portion 13b. Thereby, a part of rubber layer 14 can be bulged to the through-hole 113g, and a spring constant can be adjusted to a desired value. The spring constant can be adjusted by changing the size and number of through-holes 113g and the location where they are formed. Note that a rubber layer may or may not be provided at the site of the through-hole 113g. The other parts are the same as those in FIG.

  FIG. 4A is a cross-sectional view showing a rubber bearing body 21 according to still another embodiment of the present invention, and FIG. 4B is a bottom view showing an upper collar 22 of the rubber bearing body 21. FIG. 4C is a plan view showing the lower collar 23 of the rubber bearing body 21.

  As shown in FIGS. 4 (b) and 4 (c), the lower collar 23 has a quadrangular prism-shaped first convex portion 23a on the surface facing the upper collar 22, and a distance from the first convex portion 23a. And the cylindrical 2nd convex part 23b surrounding the 1st convex part 23a is formed. On the other hand, the upper collar 22 has a first concave portion 22a and a first concave surface that are fitted to the upper collar 22 at positions corresponding to the first convex section 23a and the second convex section 23b on the surface facing the lower collar 23. Two recesses 22b are formed. Then, by fitting the upper collar 22 and the lower collar 23 via the rubber layer 14, two fitting portions A and B are formed as shown in FIG. 4 (a).

  The horizontal load support H is formed by the inner surfaces of the recesses 22a and 22b in the fitting portions A and B, the outer surfaces of the protrusions 23a and 23b facing the side surfaces, and the rubber layer 14 disposed between these sides. Is configured. Further, a vertical load support portion V is constituted by the horizontal surface 22c of the upper rod 22, the horizontal surface 23c of the lower rod 23 facing the horizontal surface 22c, and the rubber layer 14 disposed between the horizontal surfaces 22c and 23c. Further, a vertical surface 22d of the concave portion 22a (bottom surface of the concave portion), a horizontal surface 23d of the convex portion 23a facing the horizontal surface 22d (end surface of the convex portion), and the rubber layer 14 disposed between the horizontal surfaces 22d and 23d. The load supporting portion V is configured and disposed between the horizontal surfaces 22e and 23e, the horizontal surface 22e of the concave portion 22b (the bottom surface of the concave portion), the horizontal surface 23e of the convex portion 23b facing the horizontal surface 22e, and the end surface of the convex portion. The rubber layer 14 forms a vertical load support portion V.

  FIG. 5A is a cross-sectional view showing a rubber bearing 31 according to still another embodiment of the present invention, and FIG. 5B is a bottom view showing an upper collar 32 of the rubber bearing 31. FIG. 5 (c) is a plan view showing the lower collar 33 of the rubber bearing body 31.

  As shown in FIGS. 5B and 5C, the lower rod 33 has four quadrangular prism-shaped first convex portions 33a on the surface facing the upper rod 32, and the first convex portions 33a. And a cylindrical second convex portion 33b which is spaced apart from and surrounds the first convex portion 33a. On the other hand, the upper collar 32 has four first recesses 32a that are fitted to the upper collar 32 at positions corresponding to the first projections 33a and the second projections 33b on the surface facing the lower collar 33. And the 2nd recessed part 32b is formed. Then, the upper collar 32 and the lower collar 33 are fitted through the rubber layer 14 to form a plurality of fitting portions A and B as shown in FIG.

  The horizontal load support portion H is formed by the inner side surfaces of the concave portions 32a and 32b in the fitting portions A and B, the outer side surfaces of the convex portions 33a and 33b facing the side surfaces, and the rubber layer 14 disposed between these side surfaces. Is configured. Further, a vertical load support portion V is constituted by the horizontal surface 32c of the upper rod 32, the horizontal surface 33c of the lower rod 33 facing the horizontal surface 32c, and the rubber layer 14 disposed between the horizontal surfaces 32c and 33c. Furthermore, the horizontal surface (the bottom surface of the concave portion) 32d of the concave portion 32a, the horizontal surface (end surface of the convex portion) 33d of the convex portion 33a facing the horizontal surface 32d, and the rubber layer 14 disposed between the horizontal surfaces 32d and 33d A load supporting portion V is configured, and is disposed between the horizontal surfaces 32e and 33e, the horizontal surface 32e of the concave portion 32b (the bottom surface of the concave portion), the horizontal surface 33e of the convex portion 33b facing the horizontal surface 32e (the end surface of the convex portion). The rubber layer 14 forms a vertical load support portion V.

  FIG. 6 (a) is a cross-sectional view showing a rubber bearing body 41 according to still another embodiment of the present invention, and FIG. 6 (b) is a bottom view showing an upper collar 42 of the rubber bearing body 41. FIG. 6C is a plan view showing the lower collar 43 of the rubber bearing body 41. 6A is a cross-sectional view of the rubber bearing body 41 cut at the same position as the line ZZ shown in FIG. 6C.

  As shown in FIGS. 6 (b) and 6 (c), the lower collar 43 is formed with three cylindrical convex portions 43 a on the surface facing the upper collar 42. On the other hand, the upper collar 42 is formed with a concave portion 42a that fits with the lower collar 43 at a position corresponding to the convex portion 43a. Then, the upper collar 42 and the lower collar 43 are fitted through the rubber layer 14 to form a plurality of fitting portions D as shown in FIG.

  A horizontal load support portion H is constituted by the inner side surface of the concave portion 42a in the fitting portion D, the outer side surface of the convex portion 43a facing the side surface, and the rubber layer 14 disposed between these side surfaces. Further, a vertical load support portion V is constituted by the horizontal surface 42c of the upper rod 42, the horizontal surface 43c of the lower rod 43 facing the horizontal surface 42c, and the rubber layer 14 disposed between the horizontal surfaces 42c and 43c. Furthermore, the horizontal surface (the bottom surface of the concave portion) 42d of the concave portion 42a, the horizontal surface (end surface of the convex portion) 43d of the convex portion 43a facing the horizontal surface 42d, and the rubber layer 14 disposed between the horizontal surfaces 42d and 43d A load support portion V is configured.

  In each of the above embodiments, the case where the convex portion is formed on the lower collar and the concave portion is formed on the upper collar is described as an example. However, in the rubber bearing body of the present invention, the convex portion is formed on the upper collar. May be formed, the recess may be formed on the lower collar, the recess and the projection may be formed on the upper collar, and the projection and the recess corresponding to the recess / projection of the upper collar may be formed on the lower collar. . Moreover, the shape of a convex part and a recessed part is not limited to a cylindrical shape or a square pole. The convex part and the concave part can be used even if the side surface is inclined.

  Further, in each of the above-described embodiments, a case where the first convex portion and the second convex portion are formed on the lower collar and the first concave portion and the second concave portion are formed on the upper collar is described as an example. However, in the present invention, the number of convex portions and concave portions, that is, the number of fitting portions is not particularly limited, and may be appropriately set according to the size of the rubber support, the size of the upper structure, and the like. That's fine. For example, when a rubber bearing is enlarged to support a large superstructure, it is preferable to increase the number of fitting portions provided on the rubber bearing so that the load resistance against vertical load and horizontal load is increased. It can be improved further.

  Furthermore, instead of the rubber layer, other elastic materials such as a thermoplastic resin and a thermoplastic elastomer may be used. Examples of the thermoplastic resin include polyethylene, polypropylene, polyvinyl chloride, ABS resin, acrylic resin, polystyrene, polycarbonate, nylon, polyacetal, polyethylene terephthalate, polyvinylidene chloride, fluororesin, and polybutadiene. Examples of the thermoplastic elastomer include polystyrene-based TPE, polyolefin-based TPE, polyvinyl chloride-based TPE, polyurethane-based TPE (TPU), polyester-based TPE, and polyamide-based TPE.

  In addition, the elastic support body of this invention is applicable also to various structures, such as a building and machinery other than for bridge | bridging. For example, a building elastic support body includes an upper frame fixed to a building that is an upper structure, a lower frame fixed to a foundation that is a lower structure, and an elastic layer disposed therebetween. . The elastic support body for machines includes an upper frame fixed to a machine that is an upper structure, a lower frame fixed to a foundation that is a lower structure, and an elastic layer disposed therebetween.

(a) is a cross-sectional view showing a rubber bearing body according to an embodiment of the present invention, (b) is a bottom view showing the upper arm of the rubber bearing body, (c) is a rubber bearing body It is a top view which shows a lower arm. (a) is a bottom view showing the upper collar of the rubber bearing body according to another embodiment of the present invention, (b) is a plan view showing the lower collar of the rubber bearing body, (c) and ( d) is a sectional view showing a rubber bearing. (a) is a bottom view showing an upper collar of a rubber bearing body according to a modification of the embodiment shown in FIG. 2, FIG. 3 (b) is a plan view showing a lower collar of the rubber bearing body, and FIG. ) Is a cross-sectional view showing a rubber bearing. (a) is a cross-sectional view showing a rubber bearing body according to still another embodiment of the present invention, (b) is a bottom view showing the upper collar of the rubber bearing body, (c) is a rubber It is a top view which shows the lower collar of a support body. (a) is a cross-sectional view showing a rubber bearing body according to still another embodiment of the present invention, (b) is a bottom view showing the upper collar of the rubber bearing body, (c) is a rubber It is a top view which shows the lower collar of a support body. (a) is a cross-sectional view showing a rubber bearing body according to still another embodiment of the present invention, (b) is a bottom view showing the upper collar of the rubber bearing body, (c) is a rubber It is a top view which shows the lower collar of a support body. It is a fragmentary sectional view which shows the conventional rubber bearing body and the side block which fixes this.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Rubber support body for bridges 12 Upper arm 12a 1st recessed part 12b 2nd recessed part 12c Horizontal surface 13a 1st convex part 13b 2nd convex part 13c Horizontal surface 14 Rubber layer

Claims (8)

An elastic support for a structure comprising an upper frame fixed to the upper structure, a lower frame fixed to the lower structure, and an elastic layer disposed therebetween,
The upper frame is formed with a concave portion and / or a convex portion on a surface facing the lower frame,
The lower frame is formed with a convex portion and / or a concave portion which is fitted to these at a position corresponding to the concave portion and / or the convex portion of the upper frame on a surface facing the upper frame,
These upper frame and lower frame are fitted through the elastic layer, and a plurality of fitting parts are formed,
In the fitting portion, the elastic layer is filled so as to be substantially in close contact between opposing surfaces of the upper frame and the lower frame including the inner surface of the concave portion, the outer surface of the convex portion, and a horizontal plane. And
Further, the inner surface of the recess in the fitting portion, the outer surface of the convex portion facing the side surface, a horizontal load bearing portion constituted by an elastic layer filled between these sides,
And the horizontal plane of the upper frame, and wherein the horizontal surface of the lower frame opposite the horizontal plane, that the vertical load-bearing part constituted by an elastic layer filled between these horizontal plane are continuous alternately Elastic support for structures. The elastic layer, the inner surface of the recess, the outer surface and the upper frame and Claim 1 Symbol are adhered respectively on opposite surfaces of the lower frame mounting structure elastic bearing body including the horizontal surface of the convex portion . One of the upper frame and the lower frame has a first protrusion on a surface facing the other, and a second protrusion that is separated from the first protrusion and surrounds the first protrusion. Part is formed,
The other of the upper frame and the lower frame has a first recess that fits into a surface facing the one and at a position corresponding to the first and second protrusions. The elastic support for a structure according to claim 1 or 2 , wherein a second recess is formed. The elastic support for a structure according to claim 3, wherein the first convex portion has a substantially columnar shape, and the second convex portion has a substantially cylindrical shape. The structure according to any one of claims 1 to 4 , wherein a cutout portion for adjusting a spring constant of the horizontal load support portion and / or the vertical load support portion is formed in the concave portion and / or the convex portion. Elastic support for objects. Wherein the upper frame and / or the lower frame, one of the claims 1 to 5 in which the through-hole or groove for adjusting the spring constant of the horizontal load-bearing part and / or the vertical load-bearing part is formed in a vertical direction An elastic bearing body for a structure according to any one of the above. An elastic bearing body for a bridge comprising an upper rod fixed to the upper structure, a lower rod fixed to the lower structure, and an elastic layer disposed therebetween,
In the upper collar, a concave portion and / or a convex portion is formed on a surface facing the lower collar,
The lower collar is formed with a convex portion and / or a concave portion which is fitted to these at a position corresponding to the concave portion and / or convex portion of the upper collar on a surface facing the upper collar.
These upper collar and lower collar are fitted through the elastic layer, and a plurality of fitting portions are formed,
In the fitting portion, the elastic layer is filled so as to be substantially in close contact between the opposing surfaces of the upper and lower eyelids including the inner side surface of the concave portion, the outer side surface of the convex portion, and the horizontal surface. And
Further, the inner surface of the recess in the fitting portion, the outer surface of the convex portion facing the side surface, a horizontal load bearing portion constituted by an elastic layer filled between these sides,
And the horizontal plane of the upper frame, and wherein the horizontal surface of the lower frame opposite the horizontal plane, that the vertical load-bearing part constituted by an elastic layer filled between these horizontal plane are continuous alternately Elastic support for bridges. The elastic bearing body for a bridge according to claim 7 , wherein the elastic layer is bonded to the inner surface of the concave portion, the outer surface of the convex portion, and the opposing surfaces of the upper and lower collars including the horizontal plane.

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