JP2008157357A - Rolling supporting device and base isolation device equipped therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling supporting device having improved supporting capability, an aligning function, and a wider movable range than that in prior art, while maintaining desired motion performance. <P>SOLUTION: The rolling supporting device comprises a plurality of large-diameter rolling elements 6 rollable on the upper face of a bas plate 3, a case 5 for rollably holding the large-diameter rolling elements 6 in the state that part of the large-diameter rolling elements 6 are protruded from the lower part of the case 5, the case 5 having a convex-shape spherical portion 5a at the upper part, and a concave-shape spherical supporting part 8 to be fitted into the spherical portion 5a corresponding to its convex shape in an aligned manner. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rolling support device used for a seismic isolation device between a ground and a structure, and a seismic isolation device including the same.

  Conventionally, some seismic isolation devices use a rolling support device as shown in FIG. 14 (for example, Patent Document 1). The rolling support device shown in the figure suppresses the shaking of the structure 83 by making the large-diameter rolling element 81 supported by the case 80 freely rollable on the base plate 82 on the ground side. By making the small-diameter rolling element 84 roll freely along the surface of the rolling element 81, the large-diameter rolling element 81 can be smoothly rolled.

Conventional technology is known in which one large-diameter rolling element is in contact with the base plate at one point. However, as shown in FIGS. 15 and 16, by using a plurality of rolling elements 81, the supporting ability is improved. (For example, Patent Document 2).
The multi-point contact rolling support device provided with such a plurality of rolling elements 81 is a base plate having a gentle upward slope from the center to the outside in a plan view, and returns a predetermined rolling element to the origin. In principle, it cannot be used with a so-called origin return function. However, the rolling support device can be used even if it has a function of returning to the origin by providing a spherical hinge portion in the rolling support device with multiple points of contact.
Japanese Patent Laid-Open No. 11-36659 Japanese Patent Laid-Open No. 11-336831

A problem of the rolling support device disclosed in Patent Document 2 will be described with reference to FIG.
When the rolling support device has the spherical hinge portion 85, it can have a function of returning to the origin, but the spherical hinge portion 86a (that is, the spherical seat) provided on the upper portion of the support body 86 has a concave shape. For this reason, the movable range of the spherical seat 86a with respect to the spherical hinge member 87 during isolation is narrowed. Further, since the spherical seat 86a has a concave shape, water easily enters and accumulates in the spherical seat 86a. Therefore, rust is generated on the spherical seat 86a, and the spherical seat 86a may not be able to obtain a desired motion with respect to the spherical hinge member 87.

  By the way, when a rolling support device with multiple points of contact is applied to a seismic isolation device, when this seismic isolation device is mounted under the floor, it is greatly affected by mounting errors (horizontal, vertical, origin position, etc.) with the base plate. . For example, there are horizontal and vertical shifts. In addition, it is necessary to attach a plurality of (for example, about 10) rolling support devices to a single building, which greatly affects each difference. A single point contact rolling support device can tolerate some differences, but in the case of multiple point contact, it is greatly affected by each other difference, so the rolling support device cannot obtain a desired motion. Sometimes. Therefore, it is necessary to strictly manage the mounting accuracy of the rolling support device.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a rolling support device capable of improving the support capability, having a centering function, expanding the movable range of the conventional technology, and maintaining desired motion performance, and the same. To provide seismic isolation devices.

  A rolling support device according to the present invention includes one or a plurality of rolling elements that can roll on the upper surface of a base plate, and a case that holds the rolling elements in a freely rolling manner. A part of the rolling elements protrudes below the case. A case that is held in a state, a convex spherical portion provided on the upper portion of the case, and a concave spherical receiving portion that fits in alignment with the convex shape of the spherical portion. It is characterized by.

  According to this structure, the protrusion part from the case of a rolling element contacts a baseplate etc., and it can roll on it. Further, a concave spherical receiving portion is fitted with a centering property with respect to a convex spherical portion provided on the upper portion of the case. In particular, since the convex spherical portion is provided on the upper part of the case, the movable range of the rolling support device can be expanded as compared with the conventional art in which the concave spherical seat is provided on the support body. Therefore, the rolling support device can be made compact. A centering function is realized by the spherical surface portion and the spherical surface receiving portion. With this alignment function, mounting errors can be allowed. The mounting error includes at least one of a horizontal mounting error, a vertical mounting error, and an origin position mounting error.

  When an earthquake occurs, even if the foundation of the structure is somewhat distorted by this earthquake, the distortion can be allowed due to the alignment. Further, by providing a convex spherical portion on the upper part of the case, even if this rolling support device is submerged, water does not flow and accumulate along the convex shape. Therefore, rust hardly occurs on the spherical surface portion and the like, so that the spherical surface portion can be smoothly moved with respect to the spherical surface receiving portion. Therefore, the desired motion performance of the rolling support device can be maintained. In addition, when a plurality of rolling elements are applied, the load capacity can be increased.

  In the present invention, it is preferable that the spherical portion is formed as a convex spherical surface on the entire upper surface of the case. According to this configuration, the movable range of the rolling support device can be surely expanded as compared with the conventional technology in which the conventional concave-shaped spherical seat is provided. Further, the movable range of the rolling support device can be further expanded as compared with the case in which the upper part of the case is partially formed into a convex spherical surface.

  In the present invention, it is preferable that the concave portion of the spherical receiving portion is formed larger than the convex portion of the spherical portion. According to this configuration, for example, the movable range of the rolling support device can be expanded more than the configuration in which the concave shape portion of the spherical receiving portion and the convex shape portion of the spherical surface portion are substantially the same.

  In the present invention, a self-lubricating film may be provided between the spherical surface portion and the spherical surface receiving portion. According to this configuration, since a lubricant such as grease or oil is not used between the spherical surface portion and the spherical surface receiving portion, the spherical surface portion and the spherical surface receiving material are caused by this lubricant flowing undesirably or causing a loss of lubrication. Lubrication failure between the parts can be suppressed. That is, the lubrication state between the spherical surface portion and the spherical surface receiving portion can be favorably maintained. By adopting a film having self-lubricating properties instead of a lubricant such as grease, environmental pollution associated with the scattering of the lubricant can be suppressed.

  In the present invention, a self-lubricating film may be provided between the case and the rolling element. According to this configuration, for example, compared to a structure in which a large-diameter rolling element is freely held by a case via a plurality of small-diameter rolling elements, a plurality of small-diameter rolling elements are not required, thereby reducing the number of parts. Can do. Also, compared to a structure that uses a lubricant such as grease between the case and the rolling element, a lid member that prevents the lubricant from flowing out and scattering is not required, so the number of parts can be reduced in this respect as well. it can. Therefore, it is possible to reduce the number of assembly steps and reduce the manufacturing cost. In addition, since no lubricant such as grease or oil is used between the case and the rolling element, it suppresses poor lubrication between the case and the rolling element due to undesired flow of the lubricant or loss of lubrication. can do. By adopting a film having self-lubricating properties instead of a lubricant such as grease, environmental pollution associated with the scattering of the lubricant can be suppressed.

  In this invention, it is preferable that the coating film is provided by injection molding and has unevenness or protrusions that match the unevenness or groove formed in the base material on which the coating film is provided. According to this configuration, the coating is firmly fixed to the inner surface of the injection-molded base material, and displacement and peeling of the coating are suppressed. Therefore, the desired motion performance of the rolling support device can be maintained.

  In the present invention, it is preferable that the coating has a uniform thickness in a range of 45 ° or more upward with respect to the center of the rolling element without providing the unevenness or protrusions. According to this configuration, the load of the structure that is supported by the rolling support device is greatly affected in the upward angle range of 45 ° or more. Therefore, in the part of this angle range, the rolling element can be smoothly rolled by setting the film to a uniform thickness without providing irregularities or protrusions.

  According to another aspect of the present invention, there is provided a seismic isolation device comprising: the rolling support device according to any one of claims 1 to 7; and a base plate on which a rolling element of the rolling support device is placed so as to be freely rollable and point-contacted. The base plate is characterized in that the upper surface of the base plate has a concave shape for returning a predetermined rolling element to the origin.

  According to this configuration, the rolling support device with a multipoint contact can be applied to a device having a so-called origin return function for returning a predetermined rolling element to the origin. When this rolling support device includes a plurality of rolling elements, the load capacity can be increased. In addition, since the rolling support device of this seismic isolation device has a concave spherical receiving portion that fits in alignment with the convex shape of the spherical portion, a plurality of rolling support devices are attached under the floor. Even in this case, each difference can be allowed. Therefore, a plurality of rolling support devices can be easily and quickly mounted under the floor without strictly managing the mounting accuracy of the rolling support device.

  In the rolling support device of the present invention, a convex spherical portion is provided at the upper portion of the case, and the concave spherical receiving portion is fitted with this spherical portion with alignment, so that the upper portion of the support body The rolling support device can be moved over a wider range than the prior art in which a concave spherical seat is provided, and the submerged water does not flow and accumulate along the convex shape of the spherical portion. Therefore, rust hardly occurs on the spherical surface portion and the like, so that the spherical surface portion can be smoothly moved with respect to the spherical surface receiving portion. Therefore, it is possible to improve the support capability, and it is possible to obtain a rolling support device that has a centering function and that has a movable range wider than that of the prior art, and can maintain a desired motion performance.

  A first embodiment of the present invention will be described with reference to FIGS. The seismic isolation device 1 includes, for example, a base plate 3 installed on a foundation pillar portion 2 of a concrete foundation and a rolling support device 4 installed on the base plate 3. The rolling support device 4 includes a case 5, a large-diameter rolling element 6 composed of a plurality of (9 in this embodiment) steel balls interposed between the base plate 3 and the case 5, and a plurality of steel balls. A small-diameter rolling element 7 and a concave spherical receiving portion 8 that fits into a spherical portion 5a (described later) of the upper portion of the case 5 with alignment. The plurality of large-diameter rolling elements 6 are arranged at predetermined intervals along a horizontal plane. The upper surface of the base plate 3 is a rolling surface that supports the plurality of large-diameter rolling elements 6 so as to be able to roll, and the rolling surface has a concave shape that rises upward from the center toward the outer periphery. . The concave deepest position P <b> 1 is the origin position where the rolling element 6 at the center in the plan view among the plurality of rolling elements 6 is located at the normal time.

  In the case 5, as shown in FIG. 2, a spherical rolling surface 9 that supports a plurality of small-diameter rolling elements 7 so as to roll in an arrayed state along the upper surface of the large-diameter rolling element 6, and A circulation path 10 for circulating the small-diameter rolling elements 7 on the rolling surface 9 is provided following the periphery of the rolling surface 9. The rolling surface 9 and the circulation path 10 are configured by attaching a plurality (9 in this embodiment) of rolling element receivers 5b corresponding to the number of large diameter rolling elements 6 to the case body 5H of the case 5. . The case 5 includes the case body 5H and a plurality of rolling element receivers 5b. Each rolling element receiver 5b is attached to the case main body 5H by a protruding portion 5ba protruding upward.

  The rolling element receiver 5b is a member whose inner and outer surfaces are formed in a spherical shape concentric with the center of the large-diameter rolling element 6 and whose spherical inner surface 5bb is the rolling surface 9. The circulation path 10 is provided between the spherical outer surface of the rolling element receiver 5b and the spherical inner surface of the case body 5H facing the outer surface. This circulation path 10 is filled with a lubricant such as grease. In the present embodiment, the case 5 is configured to include a case main body 5H and a plurality of rolling element receivers 5b. However, a rolling element presser (not shown) that forms a part of the circulation path is formed below the case main body 5H. May be provided. Further, a solid lubricant may be provided in a part of the rolling element presser and the lubricant such as grease may be omitted. In this case, leakage of a lubricant such as grease can be reliably prevented from the case. The plurality of small-diameter rolling elements 7 circulate while rolling along the rolling surface around the rolling element receiver 5b and the circulation path 10, thereby smoothly rotating the large-diameter rolling element 6, and the base plate 3 and the large diameter. The rolling frictional resistance between the rolling elements 6 is reduced.

The spherical portion 5a and the spherical receiving portion 8 will be described.
A convex spherical portion 5 a and a flat portion 5 c that protrude upward are provided on the upper portion of the case 5. The flat portion 5c extends from the outer peripheral edge of the spherical surface portion 5a to the outer diameter side, and is formed in a hollow circular shape (in plan view) along a plane substantially orthogonal to the case axial direction. The spherical portion 5 a has a center of curvature that coincides with the axis of the case 5 and is near the lower portion of the case 5. The spherical surface receiving portion 8 is an aligning seat, and is fitted with a back surface portion 8a attached to the lower surface portion of the structure 11 and the spherical surface portion 5a so as to correspond to the convex shape of the spherical surface portion 5a. A concave shape portion 8b having a concave shape and a flat portion 8c provided to face the flat portion 5c are provided. The center of curvature of the concave portion 8b is formed so as to substantially coincide with the center of curvature of the spherical portion 5a. The flat part 8c is provided so as to extend from the outer peripheral edge part of the concave shaped part 8b to the outer diameter side. The spherical surface portion 5a slides relative to the spherical surface receiving portion 8 in a state where a lubricant such as grease is provided between the spherical surface portion 5a and the spherical surface receiving portion 8b. . However, it is not limited to lubricants such as grease (described later).

  Next, the difference between the movable range of the present rolling support device 4 and the movable range of the conventional rolling support device will be described. The amount of movement of the structure 11 when the case 5, that is, the rolling support device 4 is moved from the origin position P1, is determined by, for example, the distance from the side end 2a of the foundation pillar 2 to the side end 11a of the structure 11. . However, when the case 5 is at the origin position P1, the relative position of the side end portion 11a of the structure 11 with respect to the side end portion 2a of the foundation pillar portion 2 is the same as that of the present rolling support device 4 and the conventional rolling support device. . Further, the curvature radius of the spherical surface portion 5a of the rolling support device 4 is the same as the curvature radius of the spherical hinge portion of the conventional example, and the concave shape of the base plate 3 of the base isolation device 1 and the concave shape of the base plate 82 of the conventional example are as follows. Identical. In addition, the main dimensions of the rolling support device are the same as those of the present rolling support device 4 and the conventional rolling support device.

  As shown in FIG. 4, the movement amount B1 of the structure 11 of this embodiment is larger than the movement amount A1 of the structure of the conventional example. In the rolling support device 4 according to the present embodiment, a concave spherical receiving portion 8 is fitted with a centering property with respect to a convex spherical portion 5 a provided on the upper portion of the case 5. In particular, since the convex spherical portion 5a is provided on the upper portion of the case 5, the range of movement of the rolling support device 4 can be expanded as compared with the conventional technology in which the concave spherical seat is provided on the support body. Can do. As a result, when the distance that the structure 11 sways when the earthquake occurs is the limit of the conventional example, this embodiment can still tolerate even if the sway is larger than the conventional example.

  Since the movable range of the rolling support device 4 according to this embodiment can be expanded as compared with the conventional example, the rolling support device 4 can be made compact. Therefore, handling of the rolling support device 4 can be facilitated and work efficiency can be increased. In addition, according to the rolling support device 4 according to the present embodiment, a centering function is realized by the spherical surface portion 5a and the spherical surface receiving portion 8, and an installation error can be allowed by this aligning function. The mounting error includes at least one of a horizontal mounting error, a vertical mounting error, and an origin position mounting error of the rolling support device 4 and the base plate 3. When an earthquake occurs, even if the foundation of the structure is somewhat distorted by this earthquake, the distortion can be tolerated due to the alignment. Further, by providing the convex spherical portion 5a on the upper portion of the case 5, even if the rolling support device 4 is submerged, water does not flow and accumulate along the convex shape. Therefore, rust hardly occurs on the spherical surface portion 5a and the like, and the spherical surface portion 5a can be smoothly moved with respect to the spherical surface receiving portion 8. Therefore, the desired motion performance of the rolling support device 4 can be maintained. In addition, since a plurality of large-diameter rolling elements 6 are applied, it is possible to increase the load capacity, for example, compared to a rolling support device including a single large-diameter rolling element.

Next, a second embodiment of the present invention will be described with reference to FIGS.
In the following description, portions corresponding to the matters described in the embodiment shown in FIG. 1 to FIG. 4 described above are denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described, the other parts of the configuration are the same as those described in the preceding section. Not only the combination of the parts specifically described in each embodiment, but also the embodiments can be partially combined as long as the combination does not hinder.

  As shown in FIGS. 5B and 6B, the spherical portion 5aa of the rolling support device 4A according to the second embodiment has a convex shape with the upper portion of the case 5A as a whole (that is, the entire upper surface of the case). It is formed on a spherical surface. In other words, only the convex spherical portion 5aa protruding upward is provided on the upper portion of the case 5A, and no flat portion is provided. The spherical portion 5aa has a center of curvature that coincides with the axis of the case 5A and exists below the case 5A. The radius of curvature of the spherical portion 5aa is set to be larger than the radius of curvature of the spherical portion 5a of the first embodiment, for example. The spherical surface receiving portion 8A has a concave shape portion 8Aa that faces the spherical surface portion 5aa and has a concave shape that fits and fits in correspondence with the convex shape of the spherical surface portion 5aa, and a flat portion is provided. Not.

  The conventional technology (FIGS. 5A and 6A) in which a concave spherical seat 12a is provided on the upper part of the support body 12 is movable as the sphere diameter increases (see FIG. 4A). The range becomes narrower (A1> A2). In the prior art, if the spherical diameter of the spherical portion on the upper part of the support body 12 is reduced, the movable range is widened. However, as the spherical diameter is reduced, the rigidity of the spherical portion is reduced, and the load capacity between the spherical portions is reduced. Go down. On the other hand, in this embodiment, the movable range becomes larger (B1 <B2) as the spherical diameter of the spherical portion at the upper part of the case is increased (see FIGS. 4B and 6B). . Further, in the present embodiment, by increasing the spherical diameter of the spherical portion 5aa, the movable range can be widened, the rigidity of the spherical portion 5aa can be increased, and the load capacity between the spherical portions can be increased. Since both the spherical surface portion 5aa and the spherical surface receiving portion 8Aa are formed with a radius of curvature that does not have a flat portion, the shape of the grinding wheel can be simplified, for example, compared to the grinding wheel used in the first embodiment. Reduction can be achieved. Other effects similar to those of the first embodiment are obtained.

Next, a third embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 7B and 8B, the spherical portion 5ab of the rolling support device 4B according to the third embodiment is formed so that the upper portion of the case 5B is a convex spherical surface as a whole. Further, the radius of curvature of the spherical surface portion 5ab is set larger than the radius of curvature of the spherical surface portions 5a and 5aa of the first and second embodiments. The spherical surface receiving portion 8B facing the spherical surface portion 5ab has a concave shape portion 8Ba having a concave shape that fits with a convexity corresponding to the convex shape of the spherical surface portion 5ab, and no flat portion is provided. . Further, the spherical receiving portion 8B is formed such that the concave shape portion 8Ba is larger than the convex shape of the spherical surface portion 5ab. In the present embodiment, the movable range is made the first and second embodiments by making the spherical diameter of the spherical portion 5ab, that is, the radius of curvature larger than the radius of curvature of the spherical portions 5a and 5aa of the first and second embodiments. And the rigidity of the spherical portion 5ab can be increased, and the load capacity between the spherical portions can be increased. Other effects similar to those of the first and second embodiments are obtained.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
The spherical portion 5ac of the rolling support device 4C according to the fourth embodiment is formed as a spherical surface having a convex shape as a whole at the top of the case 5C, and the curvature radius of the spherical portion 5ac is the first, second, and third. It is set larger than the radius of curvature of the spherical portions 5a, 5aa, 5ab of the embodiment. The spherical receiving portion 8C has a concave shape portion 8Ca that forms a concave shape that fits with a centering property corresponding to the convex shape of the spherical surface portion 5ac. The spherical receiving portion 8Ca has a concave shape portion 8Ca formed larger than the convex shape of the spherical surface portion 5ac, and the diameter size K1 is, for example, 1.2 times larger than the diameter size K2 according to the third embodiment. Yes. As a result, the movable range can be further widened than in the third embodiment. Therefore, the larger the spherical diameter of the spherical portion, the wider the movable range may be. However, since the alignment performance becomes worse as the spherical diameter of the spherical surface portion becomes larger, it is not desirable that the alignment performance is too large considering this alignment performance. That is, it is desirable that the spherical diameter of the spherical portion is at least equal to or smaller than the spherical diameter of the base plate 3. Other effects similar to those of the first to third embodiments are obtained.

FIG. 10 is a cross-sectional view of a rolling support device or the like provided with a self-lubricating resin according to a fifth embodiment of the present invention. FIG. 11 is a sectional view of a rolling support device and the like provided with a self-lubricating resin according to a sixth embodiment of the present invention.
As shown in FIG. 10, between the spherical surface portion 5ad and the spherical surface receiving portion 8D of the case 5D of the rolling support device 4D, for example, a fluororesin liner {Teflon (registered trademark) liner on the surface portion of the spherical surface receiving portion 8D. } Or the like, a resin sheet 13 having a self-lubricating property (corresponding to a film having a self-lubricating property) is fixed. Alternatively, as shown in FIG. 11, in the rolling support device 4E, a coating film 14 made of a resin having a high self-lubricating property, a low friction coefficient, and excellent wear resistance is injection-molded on the surface portion of the spherical receiving portion 8E. It is fixed. Examples of the resin material constituting the coating 14 include a resin composition for a sliding material in which a polyfluorinated olefin resin such as polytetrafluoroethylene and a powdered aromatic polyamide resin are added as essential components to a polyimide resin. Is used. As a product of such a resin material, for example, BEANY 500 manufactured by NTN can be used. In the injection molding, in order to prevent the coating film 14 from being displaced, it is desirable that the base material on which the coating film 14 is provided is provided with irregularities 15 or grooves, and has irregularities or protrusions that match the irregularities 15 or grooves.

  According to the rolling support devices 4D and 4E according to the fifth and sixth embodiments, since lubricants such as grease and oil are not used, this lubricant is caused to flow undesirably or cause a loss of lubrication. Lubrication failure between the spherical surface portion 5ad and the spherical surface receiving portion 8D (8E) can be suppressed. That is, the lubrication state between the spherical surface portion 5ad and the spherical surface receiving portion 8D (8E) can be favorably maintained. By adopting a film having self-lubricating properties instead of a lubricant such as grease, environmental pollution associated with the scattering of the lubricant can be suppressed. Other effects similar to those of the first to fourth embodiments are obtained. In the fifth and sixth embodiments, the coating film is provided on the surface portion of the spherical surface receiving portion, but the coating film may be provided on the spherical surface portion.

FIG. 12 is a sectional view of a rolling support device or the like provided with a self-lubricating resin according to a seventh embodiment of the present invention. FIG. 13 is an enlarged cross-sectional view of a main part of the rolling support device.
The rolling support device 4F includes a case 5F, a rolling element holding recess 16 formed on the lower surface of the case 5F, and a plurality of large pieces partially fitted in the rolling body holding recess 16 so as to protrude downward. A radial rolling element 6 and a resin film 17 provided on a surface in contact with each rolling element 6 on the inner surface of the rolling element holding recess 16 are provided. The rolling element holding recess 16 is formed in a spherical shape concentric with the rolling elements 6 to be held.

  A plurality of concave and convex portions 16a and 16b (or grooves) are formed on the spherical inner surface of the rolling element holding concave portion 16, and the concave portion 16a of the concave and convex portions 16a and 16b is formed on the spherical outer surface of the resin film 17. A filling portion to be filled is provided. The resin coating 17 is provided by resin injection molding or the like. Further, the concave and convex portions 16 a and 16 b of the rolling element holding concave portion 16 are not provided in a range of 45 ° or more upward with respect to the center L 1 of the large diameter rolling element 6. In other words, the resin coating 17 has a uniform thickness t1 in which the concave and convex portions 16a and 16b are not provided in a portion in the range of 45 ° or more upward with respect to the center L1 of the large diameter rolling element 6. For the resin coating 17, a resin similar to that shown in FIG. 11 having high self-lubricity, a small friction coefficient, and excellent wear resistance is used. The resin coating 17 is integrally fixed to the inner surface of the rolling element holding recess 16 by injection molding or the like. The large-diameter rolling element 6 is fitted on the spherical inner surface of the resin film 17 so as to be freely rollable.

  In this embodiment, since the resin film 17 having self-lubricating properties is provided between the case 5F and the large-diameter rolling element 6 instead of the small-diameter rolling element, the small-diameter rolling element and the large-diameter rolling element are used as the case 5F. It is possible to reduce parts such as a lid (not shown) to be held in the housing. Moreover, it is not necessary to use a lubricant such as grease or oil. Therefore, by reducing the number of parts, the assembly man-hours can be reduced and the manufacturing cost can be reduced. By adopting the resin film 17 having self-lubricating properties instead of a lubricant such as grease, it is possible to suppress environmental pollution caused by the scattering of the lubricant. Further, the resin coating 17 has a uniform thickness t1 in which the uneven portions 16a and 16b are not provided in a range of 45 ° or more upward with respect to the center L1 of the large-diameter rolling element 6. According to this configuration, in the upward angle range of 45 ° or more, the load of the structure 11 supported by the rolling support device 4F acts greatly. Therefore, in this range, the large-diameter rolling element 6 can be smoothly rolled by setting the resin film 17 to the uniform thickness t1 without providing the uneven portions 16a, 16b or the grooves. By providing the concavo-convex portions 16 a and 16 b in an angle range excluding upward 45 °, it is possible to prevent the resin film 17 from being displaced due to the load of the large-diameter rolling element 6. Other effects similar to those of the first to sixth embodiments are obtained.

As another embodiment of the present invention, when used for the purpose of supporting a building, this rolling support device is installed in the vicinity of the ground with high humidity. Therefore, for the purpose of preventing rust, the rolling surface may be subjected to a surface treatment such as a plating treatment or a parker treatment by Nippon Parker Rising Co., Ltd.
Moreover, as another embodiment, when a building shakes greatly during an earthquake or the like and exceeds a preset movable range, the case may undesirably get over the base plate. In each embodiment, since the spherical surface portion and the spherical surface receiving portion are separate bodies, there is a possibility of getting over (disengaging) between the case and the spherical surface receiving portion. In order to avoid this, a stopper may be provided or provided with a function. For example, as shown in FIG. 9B, a stopper SP is installed on the outer diameter side of the base plate 3 or the outer diameter side of the spherical receiving portion, or the curvature of the outer diameter side of the base plate 3 is directed outward from the center. According to the above, the shape is gradually reduced to a shape having a stopper function.

Furthermore, as another embodiment, when the stopper is installed on the outer diameter side of the base plate or the outer diameter side of the spherical receiving portion, the case may collide with the stopper and the desired seismic isolation function may not be achieved. Therefore, you may provide a buffer material in the location where a stopper and a case collide. Examples of the buffer material include resins such as bump rubbers and springs used in automobiles and the like, and resins such as bump rubbers excellent in shock absorption are desirable.
In each embodiment, one rolling support device is provided with a plurality of large-diameter rolling elements, but it is also possible to provide a single large-diameter rolling element.

1 shows a seismic isolation device and a rolling support device according to a first embodiment of the present invention, in which FIG. 1A is a plan view of the seismic isolation device, and FIG. 1B is Ib-Ib of FIG. FIG. It is sectional drawing which shows the principal part of the rolling support apparatus. It is a figure for demonstrating the difference of the movable range of the same rolling support apparatus and the rolling support apparatus of a prior art example, Fig.3 (a) is sectional drawing in the origin position of the rolling support apparatus of a prior art example, FIG.3 (b) ) Is a cross-sectional view at the origin position of the rolling support device according to the present embodiment. FIG. 4A is a cross-sectional view in which a conventional rolling support device has moved a predetermined distance, and FIG. 4B is a diagram that is predetermined by the rolling support device according to the present embodiment. It is sectional drawing which moved distance. FIG. 5A is a cross-sectional view at the origin position of a conventional rolling support device, and FIG. 5B is a rolling support according to a second embodiment of the present invention. It is sectional drawing in the origin position of an apparatus. FIG. 6A is a cross-sectional view of a conventional rolling support device moved by a predetermined distance, and FIG. 6B is a rolling support device according to the second embodiment. Is a cross-sectional view moved a predetermined distance. FIG. 7A is a sectional view at the origin position of a conventional rolling support device, and FIG. 7B is a rolling support according to a third embodiment of the present invention. It is sectional drawing in the origin position of an apparatus. FIG. 8A is a cross-sectional view of a conventional rolling support device moved by a predetermined distance, and FIG. 8B is a rolling support device according to the third embodiment. Is a cross-sectional view moved a predetermined distance. It is a figure which shows the example which made the diameter size of the spherical surface receiving part larger than the diameter of a spherical surface part, Fig.9 (a) is sectional drawing in the origin position of the rolling support apparatus which concerns on the 4th Embodiment of this invention, figure 9 (b) is a sectional view in which the rolling support device has moved a predetermined distance. FIG. 10 is a cross-sectional view of a rolling support device provided with a self-lubricating resin according to a fifth embodiment of the present invention. FIG. 10 is a cross-sectional view of a rolling support device provided with a self-lubricating resin according to a sixth embodiment of the present invention. It is sectional drawing, such as a rolling support apparatus provided with self-lubricating resin concerning 7th Embodiment of this invention. It is a principal part expanded sectional view of the rolling support apparatus. It is sectional drawing of the rolling support apparatus of a prior art example. It is sectional drawing of the rolling support apparatus of a prior art example. It is sectional drawing of the rolling support apparatus of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Seismic isolation device 3 ... Base plate 5 ... Case 5a, 5aa, 5ad ... Spherical surface part 6 ... Large-diameter rolling element 8, 8A, 8B, 8C, 8D, 8E ... Spherical surface receiving part 13 ... Resin sheet 14 ... Coating | coated 16a, 16b ... Uneven portion 17 ... resin coating t1 ... uniform thickness

Claims (8)

One or more rolling elements capable of rolling on the upper surface of the base plate;
A case for freely rolling the rolling element, and a case for holding a part of the rolling element in a protruding state at the bottom of the case;
A convex spherical surface provided at the top of the case;
A concave spherical receiver that fits in alignment with the convex shape of the spherical part;
A rolling support device characterized by comprising: In claim 1,
The spherical portion is a rolling support device in which the entire upper surface of the case is formed into a convex spherical surface. In claim 1 or claim 2,
The spherical support part is a rolling support device in which a concave part is formed larger than a convex part of the spherical part. In any one of Claims 1 thru | or 3,
A rolling support device in which a coating film having self-lubricating properties is provided between the spherical surface portion and the spherical surface receiving portion. In any one of Claims 1 thru | or 4,
A rolling support device provided with a self-lubricating film between the case and the rolling element. In claim 4 or claim 5,
The rolling support device having an unevenness or a ridge that is provided by injection molding and has an unevenness or a groove that matches an unevenness or groove formed in a base material on which the film is provided. In claim 6,
The rolling support device, wherein the coating has a uniform thickness in a range of 45 ° or more upward with respect to the center of the rolling element without providing the unevenness or protrusions. A seismic isolation device comprising: the rolling support device according to any one of claims 1 to 7; and a base plate on which a rolling element of the rolling support device is placed so as to be freely rollable and point-contacted.
The base plate is a seismic isolation device in which the upper surface of the base plate has a concave shape for returning a predetermined rolling element to the origin.

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