JP4566971B2 - Sliding bearing isolation device - Google Patents

Description

  The present invention relates to a sliding bearing isolation device. More specifically, the present invention relates to a sliding bearing seismic isolation device that has both a bearing function and a damping function by adopting a sliding bearing.

With respect to this type of sliding bearing isolation device, the sliding function that engages the side surfaces of two rails installed at the top and bottom of the two rails that are installed vertically to cross each other is provided. In addition, there is known one having a damping function by sliding friction between the rail and the sliding member (see Patent Document 1). However, in the case of this conventional technology, although it is possible to have both a support function and a damping function with a simple configuration, it is possible to cope with an unbalanced load based on a construction error between upper and lower rails or a rail-related deformation caused by an earthquake or strong wind. No specific measures were taken. For this reason, for example, if there is a construction error related to the parallelism in the horizontal direction between the upper and lower rails, or if there is a deformation in the rail relationship due to an earthquake or strong wind, an offset load will occur at the sliding contact portion between the rail and the sliding member. There is a high possibility that the sliding contact portion will be damaged or deformed, and the function as a seismic isolation device may be hindered.
Japanese Patent Laid-Open No. 11-190390

In addition, it is arranged so as to penetrate through the guide grooves formed in the upper and lower rails crossing in a cross shape, and bulges above and below the moving member configured to be guided along the intersection of these guide grooves It is known that the resin plate formed by integrally forming the portions and pasting the bulging portions with the laminated rubber interposed therebetween is slidably brought into contact with the support surfaces formed on the rails. Reference 2). In the case of this conventional technology, it is possible to cope with unbalanced loads by absorbing construction errors and deformations due to earthquakes or strong winds by the deformation absorbing action of the laminated rubber at the same time as the support function to support the load by the laminated rubber. It is also possible to do. However, since it is necessary to affix laminated rubber and a resin board to the bulging part integrally formed in the upper and lower parts of a moving member, it also became a factor of the complexity and cost increase of an apparatus. Furthermore, the pasting work with adhesives is not only troublesome work, but the laminated rubber and resin plates may be peeled off over a long period of time, which may cause the function as a sliding bearing seismic isolation device. There was also.
Japanese Patent No. 3663563

  In view of the above-described conventional technical problems, the present invention provides a sliding bearing seismic isolation device that can cope with an unbalanced load based on a construction error or a rail-related deformation caused by an earthquake or strong wind with a simpler configuration. The purpose is to simplify the apparatus, reduce costs, and improve durability.

  In order to solve the above-mentioned problem, in the invention of claim 1, at least the holding member installed in a state in which movement is restricted with respect to the upper structure or the lower structure, and the holding member are formed so as to penetrate in the vertical direction. And a sliding member having a cylindrical portion inserted into the cylindrical holding hole, and at least one of the upper surface or the lower surface of the sliding member protruding from the cylindrical holding hole is on the upper structure side or lower portion The technical means of sliding contact with the bearing surface installed on the structure side was adopted. Here, the state where the movement is restricted with respect to the upper structure or the lower structure may be a state where the free relative movement of the holding member with respect to the upper structure or the lower structure is restricted, and the holding member is The form fixed with respect to the upper structure or the lower structure, and the form in which movement is restricted in a certain direction by a rail or the like are included. Further, a gap may be provided between the cylindrical holding hole formed in the holding member and the cylindrical portion of the sliding member (claim 2). In addition, the support surface is formed on the opposing surfaces of the rails installed so as to cross the upper structure and the lower structure so as to cross each other, and the movement of the holding member is limited only in the axial direction of the rails. (Claim 3). Incidentally, the operating position of the holding member in this case is constrained to the intersection that satisfies the conditions in the axial direction of both rails. Here, the rail may be of a structure that can limit the movement of the holding member only in a predetermined axial direction, and its cross-sectional shape is not questioned. It is also possible to configure such that the holding member is movably hooked with respect to the rails and can resist the vertical tensile force acting between the holding members and the rails (Claim 4). Further, the rail is composed of two flat plates with different widths, and stepped portions are formed on both side portions of the rail, and the holding member is movably hooked to the stepped portions. (Claim 5).

According to the present invention, the following effects can be obtained.
(1) Since the cylindrical holding hole is formed in the holding member and the cylindrical portion of the sliding member is inserted into the cylindrical holding hole, the sliding can be performed by selecting the height of the cylindrical holding hole. The deformable thickness of the member can be accurately and easily set large, the deformation performance can be improved, and the contact surface between the cylindrical holding hole and the cylindrical portion of the sliding member can be made large. Since the shearing action acting during the period is relieved, it is possible to accurately cope with uneven loads based on construction errors or rail-related deformation caused by earthquakes or strong winds, with a simple configuration.
(2) Therefore, it is possible to simplify the apparatus, reduce costs, improve durability, and the like.
(3) The amount of deformation of the sliding member can be increased by the gap between the cylindrical holding hole and the cylindrical portion of the sliding member.
(4) It can also be applied to a rail that crosses in a cross shape. At that time, if the holding member is configured to be movably hooked on the rail, it easily counters the tensile force in the vertical direction. be able to.
(5) Furthermore, if the rail is formed by superposing two flat plates having different widths and step portions are formed on both side portions of the rail, the holding member can be easily hooked using these step portions. can do.

  The present invention can be widely applied as seismic isolation devices for various buildings such as S structures, RC structures, SRC structures, wooden structures, etc., as well as exhibition stands for arts, etc. and equipment for plant facilities. The holding member is fixed to the upper structure or the lower structure, and the sliding member inserted into the cylindrical holding hole of the holding member is installed in the other upper structure or the lower structure, for example, in a dish shape The holding member may be slidably in contact with the bearing surface of the upper structure and the lower structure, for example, by a rail installed so as to cross in a cross shape, and along the locus of the intersection of the rails. And a configuration in which the upper and lower surfaces of the sliding member inserted into the cylindrical holding hole of the holding member are configured to be in sliding contact with the support surfaces installed in the upper structure and the lower structure. Is possible. The sliding member may be an integrally molded product made of a homogeneous material having deformable slidability, such as plastic or hard rubber, or a coating with good sliding property applied to the integrally molded product, It is also possible to constitute a laminated body including a plate portion made of steel or the like. The point is that a seismic isolation bearing that reduces the transmission of the external force between the lower structure and the upper structure by sliding on the bearing surface when external forces in the horizontal direction due to construction errors or earthquakes or strong winds are applied. What is necessary is just to show the attenuation function together with the function. In addition, if the cylindrical holding hole formed in the holding member and the cylindrical portion of the sliding member have substantially similar shapes, the specific cross-sectional shape is circular, rectangular, or other polygonal shape. An elliptical shape may be used.

  1 and 2 show a sliding bearing isolation device according to an embodiment of the present invention. FIG. 1 is a plan view and FIG. 2 is a half sectional view. As shown in the figure, the sliding bearing seismic isolation device 1 according to this embodiment is arranged in a cross shape including a lower rail 3 installed on the lower structure 2 side and an upper rail 5 installed on the upper structure 4 side. Two rails 3, 5 provided, a holding member 6 movably disposed along the rails 3, 5, and a cylindrical holding hole formed in the holding member 6 are inserted. The sliding member 7 is configured as a main element. By the way, the installation position of the seismic isolation device 1 is generally installed between the foundation part on the ground side and the lower part of the chassis, but it can also be applied when installed in the middle part of the chassis. is there. The lower rail 3 is constituted by superposing two steel flat plates 3a and 3b having different widths in the present embodiment, and downward hanging steps are formed on both sides in the width direction. . Similarly, the upper rail 5 is constituted by superposing two steel flat plates 5a and 5b having different widths, and as shown in the drawing, upward facing steps 5c and 5d are provided on both sides in the width direction. Is formed. Further, in the present embodiment, slip plates 8 and 9 are attached to the upper surface of the flat plate 3a of the lower rail 3 and the lower surface of the flat plate 5a of the upper rail 5 facing each other, and the surfaces of these slide plates 8 and 9 are attached to the upper surface of the flat plate 3a. The upper and lower surfaces of the sliding member 7 inserted into a cylindrical holding hole formed in the holding member 6 as a bearing surface are configured to be in sliding contact. In the figure, the lower rail 3 is directly fixed to the lower structure 2 side by an appropriate number of fixing bolts 10 in the vicinity of both ends in the longitudinal direction, and the upper rail 5 is in the vicinity of both ends in the longitudinal direction. The case where it is directly fixed to the upper structure 4 side by an appropriate number of fixing bolts 11 has been shown. For example, the lower rail 3 or the like is fixed via the lower structure 2 or a base plate installed on the upper structure 4 side. The fixing means is not particularly limited.

  FIG. 3 is an enlarged view of a main part of the main part of the sliding bearing isolation device 1 according to the present embodiment. FIG. 4 is a plan view showing the holding member 6 and the sliding member 7 incorporated in the holding member 6, and FIG. 5 is a half sectional view thereof. As shown in FIG. 4, in the present embodiment, a case where a rectangular cylindrical holding hole 12 is formed in the holding member 6 is shown, and a rectangular slide is formed in the cylindrical holding hole 12. A member 7 is inserted. The sliding member 7 is partially fitted in the flat plate portions 14 and 15 and the concave portions formed on the surfaces of the flat plate portions 14 and 15 around the buffer portion 13 made of deformable plastic or hard rubber. The sliding contact parts 16 and 17 having a good sliding property such as plastic or fluororesin or a coating are laminated and integrated. And as a bearing surface attached to the upper surface of the flat plate 3a of the lower rail 3 and the lower surface of the flat plate 5a of the upper rail 5 through the upper and lower sliding contact portions 16, 17 protruding from the cylindrical holding hole 12 of the holding member 6. The sliding plates 8 and 9 are slidably brought into contact with each other so as to exhibit a support function and a damping function. An appropriate gap is provided between the inner surface of the cylindrical holding hole 12 and the outer surface of the sliding member 7 so as to allow lateral deformation of the buffer portion 13 in the cylindrical holding hole 12. Thus, the degree of freedom of deformation of the sliding member 7 can be increased. In the present embodiment, the sliding member 7 has been described in which the flat plate portions 14 and 15 and the sliding contact portions 16 and 17 are laminated and integrated with the buffer portion 13 as the center. It may be integrally molded from a deformable homogeneous material. Furthermore, in the present embodiment, the case where the sliding member 7 is configured only from the cylindrical portion having the same cross section is illustrated, but the size of the portion protruding from the cylindrical holding hole 12 of the holding member 6 may be formed larger. Is possible.

  As shown in FIGS. 4 and 5, four guide rollers 18 and 19 are installed on the upper and lower surfaces of the holding member 6, respectively. As shown in FIGS. The holding member 6 is configured to move along the lower rail 3 and the upper rail 5 by sandwiching both side surfaces of the lower rail 3 and the upper rail 5 by the four guide rollers 18 and 19. 3, the upper and lower surfaces of the holding member 6 are formed on both sides of the lower rail 3 and the upper rail 5 by overlapping two flat plates 3a, 3b or 5a, 5b having different widths. Latching members 20 to 22 are installed on the latching steps 5 c and 5 d so that the holding member 6 is not detached from the lower rail 3 and the upper rail 5 by the latching members 20 to 22. It is configured. Incidentally, in this case, it is possible to cope with the case where an external force in the vertical direction is applied as described above. As shown in FIGS. 3 and 5, a step portion is formed on the inner upper edge portion of the cylindrical holding hole 12 of the holding member 6, and the sliding member 7 is formed by the presser plate 23 disposed on the step portion. The sliding member 7 is configured not to be pulled out from the cylindrical holding hole 12 of the holding means 6 by pressing the step portion formed on the outer upper edge portion of the flat plate portion 15 constituting the. Although the fixing of the presser plate 23 is shown in the drawing as being configured to be fastened and fixed together with the retaining members 20 and 21 by the fixing bolt 24, it is not particularly limited to this. A configuration in which the presser plate 23 is fixed by tightening and fixing only the latching members 20 and 21 with the bolts 24 is also possible. The structure of the presser plate 23 with respect to the sliding member 7 is similarly adopted on the lower side of the sliding member 7.

  Thus, when an external force such as an earthquake or a strong wind is applied to the bearing isolation device 1, the holding member 6 is restricted in the moving direction in the axial direction of the lower rail 3 and the upper rail 5, while It moves along the locus of the intersection of the lower rail 3 and the upper rail 5. When the holding member 6 is moved, the sliding member 7 inserted into the cylindrical holding hole 12 formed in the holding member 6 is moved through the upper and lower sliding contact portions 16 and 17. By slidingly contacting the sliding plates 8 and 9 as supporting surfaces provided on the upper surface and the lower surface of the upper rail 5, a supporting function and a damping function are exhibited. According to the present invention, as described above, since the technical means of inserting the sliding member 7 into the cylindrical holding hole 12 formed in the holding member 6 is adopted, the height and sliding of the cylindrical holding hole 12 are increased. By selecting the gap with the moving member 7, the deformation capacity of the sliding member 7 can be set accurately and easily, and the tolerance for the angle change can be set large. Even if this deformation occurs, it is possible to accurately cope with the deformation of the sliding member 7, and it is possible to eliminate the trouble caused by the conventional uneven load.

It is the top view which showed the sliding bearing seismic isolation apparatus which concerns on the Example of this invention. It is the one side sectional view showing the slide bearing seismic isolation device. It is the principal part enlarged view which expanded and showed the principal part of the same sliding bearing seismic isolation apparatus. It is the top view which showed the holding member and sliding member of the slide bearing seismic isolation device. It is the one side sectional view showing the holding member and sliding member of the slide bearing seismic isolation device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Sliding bearing seismic isolation device, 2 ... Lower structure, 3 ... Lower rail, 3a, 3b ... Flat plate, 4 ... Upper structure, 5 ... Upper rail, 5a, 5b ... Flat plate, 6 ... Holding member, 7 ... Sliding Moving members, 8, 9 ... slip plates, 10, 11 ... fixing bolts, 12 ... cylindrical holding holes, 13 ... buffer portions, 14, 15 ... flat plate portions, 16, 17 ... sliding contact portions, 18, 19 ... guides Roller, 20-22 ... Hanging member, 23 ... Presser plate, 24 ... Bolt for fixing

Claims (5)

  A holding member installed in a state in which movement is restricted at least with respect to the upper structure or the lower structure, and a cylindrical portion inserted into a cylindrical holding hole formed through the holding member in the vertical direction. And at least one of the upper surface and the lower surface of the sliding member protruding from the cylindrical holding hole is in sliding contact with a support surface installed on the upper structure side or the lower structure side. A sliding bearing seismic isolation device characterized by being configured as described above.   The sliding bearing seismic isolation device according to claim 1, wherein a gap is provided between a cylindrical holding hole formed in the holding member and a cylindrical portion of the sliding member.   The bearing surface is formed on the opposing surfaces of the rails installed to cross the upper structure and the lower structure so as to cross each other, and the movement of the holding member is limited only in the axial direction of the rails. The sliding bearing seismic isolation device according to claim 1 or 2, characterized in that it is configured.   The slide according to claim 3, wherein the holding member is movably hooked to the rail, and is configured to be able to resist a vertical tensile force acting between the holding member and the rail. Bearing seismic isolation device.   The rail is composed of two flat plates with different widths, and stepped portions are formed on both sides of the rail, and the holding member is movably hooked to the stepped portions. The sliding bearing seismic isolation device according to claim 4.

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