JP2018141491A - Base isolation unit and slide member thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely contact a slide member to a lower guide member and an upper guide member, and enhance automatic recovery action for a reference position of the slide member.SOLUTION: Between (a slide surface 50a of) a lower guide member 50 and (a slide surface 60a of) an upper guide member 60, a slide member 1 is interposed. The slide member 1 is constituted as an assembly comprising a lower member 10, an upper member 20, a connection member 30 and an elastic member 40. The lower member 10 and upper member 20 each are connected to the connection member 30 so as to be oscillatable in a 360 degree direction. By the elastic body 40, the upper member 20 is elastically supported to the lower member 10.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a seismic isolation unit and a sliding member thereof.

  Seismic isolation units are used to protect valuables such as precision instruments and artworks from earthquakes. In this seismic isolation unit, as shown in Patent Document 1, there are a lower guide member fixed on the base member side and having an upper surface as a sliding surface, and an upper structure disposed above the base member. Some have an upper guide member that is fixed and has a lower surface as a sliding surface, and a sliding member that is interposed between the lower guide member and the upper guide member. In the device described in Patent Document 1, when the lower guide member and the upper guide member are relatively displaced in the horizontal direction due to an earthquake, the sliding member is inclined with respect to the lower guide member and the upper guide member. It is designed to perform seismic isolation by sliding (seismic isolation using sliding resistance).

JP 2011-21739 A (Patent No. 5278857)

  By the way, there are many earthquakes including vibration components in the vertical direction. When the vibration in the vertical direction is generated, the sliding member may be displaced in the vertical direction, causing a considerable timing to separate from the lower guide member or the upper guide member. Thus, when the sliding member is separated from the lower guide member or the upper guide member, a desired sliding resistance cannot be obtained, which is not preferable for obtaining a high seismic isolation effect.

  Further, the lower guide member and the upper guide member are configured such that the sliding surfaces with respect to the sliding member are concave surfaces, and when the earthquake stops, the sliding member returns to the reference position, that is, the lower guide member and the upper guide member. The horizontal positional relationship with the member is returned to the reference position, but it is desired to more reliably return to the reference position.

  The present invention has been made in view of the above circumstances, and a first object of the present invention is to ensure that the sliding member is in contact with the lower guide member and the upper guide member. An object of the present invention is to provide a seismic isolation unit capable of enhancing the return action of the moving member to the reference position. Moreover, the 2nd objective of this invention is to provide the sliding member used for the said seismic isolation unit.

In order to achieve the first object, the following solution is adopted in the present invention. That is, as described in claim 1,
A lower guide member that is used by being fixed to the base member side, and whose upper surface is a sliding surface;
An upper guide member that is used by being fixed to an upper structure disposed above the base member, and whose lower surface is a sliding surface;
A sliding member interposed between the lower guide member and the upper guide member;
Have
The sliding member is configured as an assembly of a lower member, an upper member, a connecting member, and an elastic body configured separately from each other.
The lower member has a convex lower surface that comes into contact with the lower guide member, and is connected to the connecting member so as to be swingable in a 360-degree direction,
The upper member has a convex upper surface that comes into contact with the upper guide member, and is connected to the connecting member so as to be swingable in a 360-degree direction,
The elastic body is interposed between the lower member and the upper member, and elastically supports the upper member with respect to the lower member.
It is like that.

  According to the above solution, even in the event of an earthquake including vertical vibrations, the sliding member (the lower member and the upper member in the elastic member) reliably contacts the upper and lower guide members elastically. Thus, the seismic isolation action due to the sliding resistance of the sliding member can be ensured. Further, after the earthquake has stopped, the action of returning the upper and lower guide members to the reference position by returning from the state in which the sliding member is largely inclined by the elastic body can be enhanced.

  A preferred mode based on the above solution is as follows.

  The lower member and the upper member are fitted to the connecting member via a spherical surface (corresponding to claim 2). In this case, a kind of spherical joint structure can be formed, and the lower member and the upper member can be smoothly swung with respect to the connecting member.

The connecting member is a sphere,
The lower member and the upper member are formed with recesses that fit into the connecting member.
(Corresponding to claim 3). In this case, the effect corresponding to claim 2 can be obtained while simplifying the structure of the connecting member.

The connecting member is a sphere,
Each of the lower member and the upper member is formed with a fitting hole to be fitted to the connecting member, and the lower end portion of the connecting member protrudes downward from the lower end of the lower member, The upper end portion of the connecting member protrudes upward from the upper end of the upper member.
(Corresponding to claim 4). In this case, the lower member and the upper member are preferable to make the connection between the lower member and the upper member stronger while allowing the lower member and the upper member to swing smoothly so as to make spherical contact with the connecting member. . Further, at the initial stage of a small earthquake or a large earthquake, it is possible to obtain a seismic isolation action due to the rolling motion of the connecting member.

  The elastic body is annular so as to surround the connecting member (corresponding to claim 5). In this case, it is possible to prevent the elastic body from being inadvertently separated from the sliding member by using the connecting member. Moreover, it is sufficient to provide only one elastic body, which is preferable in terms of reducing the number of parts.

  The elastic body is a coil spring (corresponding to claim 6). In this case, a general-purpose coil spring can be used as the elastic body.

  The elastic body is formed in a cylindrical shape by an elastic member (corresponding to claim 7). In this case, the elastic body covers not only the connection member but also the connection part of the lower member and the upper member with respect to the connection member to prevent foreign matters such as dust from entering the periphery of the connection member from the outside. Thus, it is preferable for allowing the lower member and the upper member to swing smoothly with respect to the connecting member over a long period of time.

  A plurality of the elastic bodies are provided at intervals in the circumferential direction so as to surround the connecting member (corresponding to claim 8). In this case, a small thing can be used as each elastic body.

  A plurality of radially extending ridges extending radially are formed on the lower surface of the lower member and the upper surface of the upper member, respectively, in the circumferential direction (corresponding to claim 9). In this case, it is preferable to increase the number of contact portions between the sliding member and the upper and lower guide members as much as possible to enhance the seismic isolation effect due to the sliding resistance.

  A plurality of partial spherical protrusions are formed on the lower surface of the lower member and the upper surface of the upper member, respectively (corresponding to claim 10). In this case, it is preferable to increase the number of contact portions between the sliding member and the upper and lower guide members as much as possible to enhance the seismic isolation effect due to the sliding resistance.

  The lower member and the upper member are configured as a common member (corresponding to claim 11). In this case, the lower member and the upper member can be used as a common product, which is preferable not only for reducing the types of components, but also for preventing erroneous assembly.

  The sliding surface of the lower guide member and the sliding surface of the upper guide member are respectively concave surfaces (corresponding to claim 12). In this case, it is preferable to enhance the action of automatically returning the sliding member toward a predetermined reference position after the earthquake has stopped.

In order to achieve the second object, the following solution is adopted in the present invention. That is, as described in claim 13,
A sliding member for a seismic isolation unit interposed between a lower guide member and an upper guide member,
It is configured as an assembly of a lower member, an upper member, a connecting member, and an elastic body that are configured separately from each other.
The lower member has a convex lower surface that comes into contact with the lower guide member, and is connected to the connecting member so as to be swingable in a 360-degree direction,
The upper member has a convex upper surface that comes into contact with the upper guide member, and is connected to the connecting member so as to be swingable in a 360-degree direction,
The elastic body is interposed between the lower member and the upper member, and elastically supports the upper member with respect to the lower member.
It is like that. According to the said solution technique, the sliding member used for the seismic isolation unit corresponding to Claim 1 can be provided.

  A preferred mode based on the above solution is as follows.

  The lower member and the upper member are fitted to the connecting member via a spherical surface (corresponding to claim 14). In this case, the sliding member used for the seismic isolation unit corresponding to claim 2 can be provided.

  According to the present invention, the sliding member can be reliably brought into contact with the lower guide member and the upper guide member, and the seismic isolation function can be enhanced. In addition, it is possible to enhance the action of automatically returning the sliding member toward a predetermined reference position after the earthquake has stopped.

The top view which shows an example of the sliding member to which this invention was applied. The side view of the sliding member shown in FIG. FIG. 2 is a side sectional view of the sliding member shown in FIG. 1. The partial cross section side view which shows the state which interposed the sliding member shown in FIG. 1 between the lower guide member and the upper guide member. FIG. 5 is a diagram illustrating a state where the lower guide member and the upper guide member are relatively displaced in the horizontal direction from the state of FIG. 4 and the sliding member is largely inclined. The top view corresponding to FIG. 1 which shows the 2nd Embodiment of this invention. The side view of the sliding member shown in FIG. The top view corresponding to FIG. 1 which shows the 3rd Embodiment of this invention. The side view of the sliding member shown in FIG. Side surface sectional drawing of the sliding member shown in FIG. The 4th Embodiment of this invention is shown, and side sectional drawing of a sliding member. The side surface sectional view of a sliding member in the 5th embodiment of the present invention. The 6th Embodiment of this invention is shown, and side sectional drawing of a sliding member. The 7th Embodiment of this invention is shown, The top view corresponding to FIG. The 8th Embodiment of this invention is shown, and side sectional drawing of a sliding member. The 9th Embodiment of this invention is shown, The top view corresponding to FIG. FIG. 17 is a side sectional view of the sliding member shown in FIG. 16.

  1 to 3 show an example of a sliding member 1 to which the present invention is applied. The sliding member 1 roughly includes a lower member 10, an upper member 20, a connecting member 30, and an elastic body 40 that are formed as separate bodies (separate members).

  The lower member 10 is formed in a curved surface so that the lower surface 10a is convex downward. Further, a concave portion 10b having a circular cross section is formed at the center of the upper surface of the lower member 10. Similarly, the upper member 20 is formed in a curved surface so that the upper surface 20a is convex upward. Further, a concave portion 20b having a circular cross section is formed at the center of the lower surface of the upper member 10.

  The connecting member 30 is a sphere. The lower end portion of the connecting member 30 that is a spherical body is fitted in the concave portion 10 b of the lower member 10. Thereby, the lower member 10 can swing in the direction of 360 degrees with respect to the connecting member 30. Similarly, the upper end portion of the connecting member 30 is fitted in the recess 20 b of the upper member 20. As a result, the upper member 20 can swing in the direction of 360 degrees with respect to the connecting member 30. As described above, the lower member 10 and the upper member 20 are connected to the connecting member 30 in a concave-convex fitting relationship in contact with the spherical surface. Such lower member 10, upper member 20, and connecting member 30 can be formed of, for example, iron-based metal or hard synthetic resin.

  The elastic body 40 is constituted by a coil spring in this embodiment. The elastic body 40 is disposed between the lower member 10 and the upper member 20 so as to surround the connecting member 30. That is, an annular mounting recess 10 c is formed on the upper surface of the lower member 10 so as to surround the connecting member 30, and the lower end portion of the elastic body 30 is fitted (sitting) to the mounting recess 10 c. Similarly, an annular mounting recess 20 c is formed on the lower surface of the upper member 20 so as to surround the connecting member 30, and the upper end portion of the elastic body 30 is fitted (sitting) to the mounting recess 20 c. Each of the mounting recesses 10c and 20c is also used for positioning that restricts the elastic body 30 from moving unnecessarily with respect to the lower member 10 and the upper member 20.

  The upper member 20 is elastically supported by the elastic body 40 with respect to the lower member 10 (the lower member 10 and the upper member 20 can move relative to each other in the vertical direction). In addition, the elastic member 40 causes the lower member B10 and the upper member 20 to maintain the reference posture state extending in the horizontal direction as shown in FIGS. 2 and 3 unless a large external force is applied to the lower member B10 and the upper member 20. (Resilient posture maintenance to regulate tilt). That is, when a large external force that causes the upper member 20 to be inclined with respect to the lower member 10 is applied, when the external force is released, the biasing force of the elastic body 40 causes the reference postures of FIGS. Returns to the state.

  The sliding member 1 as described above has a vertically symmetrical shape and a laterally symmetrical shape in a side view, and also has a symmetrical shape around its central axis. In other words, the lower member 10 and the upper member 20 are common members, and the lower member 10 can be used as the lower member 10 and the upper member 20 can be used as the upper member 20. It has become.

  FIG. 4 shows a state in which the sliding member 1 is interposed between the lower guide member 50 and the upper guide member 60. The lower guide member 50 is fixed to, for example, a building foundation or floor (not shown) (in the embodiment, fixed to the lower floor in the double floor structure). Moreover, the upper guide member 60 is fixed to a structure disposed above the building foundation or floor (in the embodiment, fixed to the upper floor in the double floor structure).

  The state in which the sliding member 1 is shown in FIG. 3 (the state in which the upper member 20 is in contact with the connecting member 30 from above) is between the lower member 50 and the upper member 60. It shows a case where a load from above is received and when no external force is applied, the upper member 20 may be slightly lifted from the connecting member 30 by the urging force of the elastic body 40. possible. Then, by adjusting the urging force of the elastic body 40, it is possible to change the ratio of the load from above that acts on the sliding member 1 via the upper member 20 between the connecting member 30 and the elastic body 40. .

  The lower guide member 50 has an upper surface that is a sliding surface 50a, and the sliding surface 50a is a concave surface that is concave upward in the embodiment. The lower surface of the upper guide member 60 is a sliding surface 60a, and the sliding surface 60a is a concave surface that is concave downward in the embodiment. Each sliding surface 50a, 60a is formed in the curved surface which becomes circular in planar view, The curvature radius is set so that it may become sufficiently larger than the curvature radius of the lower surface 10a in the sliding member 1, and the upper surface 20a. Yes. In the embodiment, the sliding surfaces 50a and 60a are vertically and horizontally symmetrical in a side view, and symmetrical around the center (the lower guide member 50 and the upper guide member 60 are common members). ). In addition, the curved surface which comprises the sliding surfaces 50a and 60a can also form not only one certain curvature radius but a several different curvature radius continuously.

  FIG. 4 shows a state in which the lower guide member 50 and the upper guide member 60 are relatively displaced from the reference position in the horizontal direction by L1 due to the earthquake. At this time, the sliding member 1 is in a state where the upper member 20 is slightly inclined with respect to the lower member 10.

  FIG. 6 shows a state in which the lower guide member 50 and the upper member 60 are relatively displaced in the horizontal direction as L2 from the state of FIG. 5 (L2> L1). At this time, the inclination of the upper member 20 with respect to the lower member 10 is made larger than in the case of FIG.

  When the lower guide member 50 and the upper guide member 60 are relatively displaced in the horizontal direction due to the earthquake, the lower member 10 is slid on the lower guide member 50 (the sliding surface 50a thereof), while the upper member 20 is The upper guide member 60 (sliding surface 60a thereof) is slid to perform seismic isolation.

  In the event of an earthquake in which the lower guide member 50 and the upper guide member 60 are relatively displaced in the vertical direction, the lower member 10 is pressed against the lower guide member 50 by the urging force of the elastic body 40, while the upper side The member 20 is pressed against the upper guide member 60, and the state where the sliding member 1 is always in contact with the upper and lower guide members 50, 60 is ensured, so that a high seismic isolation function can be obtained.

  When the earthquake stops, the sliding member 1 is subjected to an action such that the inclination of the upper member 20 with respect to the lower member 10 is reduced by the urging force of the elastic body 40. In other words, the elastic member 40 exerts an action of returning the sliding member 1 from the inclined posture state shown in FIGS. 4 and 5 to the reference posture state shown in FIGS. 2 and 3 (lower side). Returning to the reference position where the member 50 and the upper member 60 are not relatively displaced in the horizontal direction, returning to a position where L1 and L2 are 0). Since the returning action toward the reference position is performed by setting the concave surfaces of the upper and lower sliding surfaces 50a and 60a, the returning toward the reference position is more effectively performed.

  6 and 7 show a second embodiment of the present invention. The same components as those in the above-described embodiment are denoted by the same reference numerals, and redundant description thereof will be omitted (this will be described later). The same applies to the third and subsequent embodiments).

  In the present embodiment, an annular central protrusion 10d is formed on the lower surface 10a of the lower member 10 at the center. The lower surface 10a includes a plurality of radial protrusions 10e extending radially from the central protrusion 10d toward the peripheral edge of the lower member 10 at intervals in the circumferential direction (8 in the embodiment). Book) is formed.

  Similarly, an annular central protrusion 20d is formed on the upper surface 20a of the upper member 20 at the center. The upper surface 20a includes a plurality of radial protrusions 20e extending radially from the central protrusion 20d toward the peripheral edge of the upper member 20 (eight in the embodiment). ) Is formed.

  When the sliding member 1 is slid in the event of an earthquake, the lower adjacent radial ridge 10e contacts the sliding surface 50a and the upper adjacent radial ridge 20e slides 60a. This is preferable for ensuring a large sliding resistance. In particular, paying attention to the lower side, in addition to the contact at two locations by the two adjacent radial protrusions 10e, the central protrusion 10d located between the two adjacent protrusions 10e. It is also possible to make contact at a total of three locations including the contact, which is preferable in increasing the contact location and ensuring a large sliding resistance (the same applies to the upper side).

  8 to 10 show a third embodiment of the present invention. In this embodiment, the connecting member 30 made of a spherical body has a larger diameter than the connecting member 30 shown in FIGS. 2 and 3. And the fitting hole 10f is formed in the center part of the lower side member 10, and the lower end part of the connection part 30 is fitted by this fitting hole 10f. In this fitted state, the lower end portion of the connecting member 30 protrudes further downward than the lower end of the lower member 10.

  Similarly, a fitting hole 20f is formed at the center of the upper member 20, and the upper end of the connecting portion 30 is fitted into the fitting hole 20f. In this fitted state, the upper end portion of the connecting member 30 protrudes further upward than the upper end of the upper member 20.

  The inner surfaces of the fitting holes 10f and 20f are spherical. In other words, the lower member 10 and the upper member 20 can be smoothly swung so that the lower member 10 and the upper member 20 are in spherical contact with the connecting member 30, and the connection between the lower member 10 and the upper member 20 is further strengthened. This is preferable.

  Here, in a normal time when no earthquake occurs, the sliding member 1 is brought into contact with the sliding surfaces 50a and 60a of the upper and lower guide members 50 and 60 with the upper and lower ends of the connecting member 40 made of a sphere. The In the initial stage of a small earthquake or a large earthquake, the seismic isolation action is performed by the rolling motion of the connecting member 40. Of course, when a large horizontal shaking occurs due to an earthquake, the sliding member 1 is inclined, the lower surface 10a of the lower member 10 slides on the sliding surface 50a, and the upper surface 20a of the upper member 20 slides on the sliding surface. It is slid by 60a and a seismic isolation action is performed.

  FIG. 11 shows a fourth embodiment of the present invention. In the present embodiment, the fitting holes 10f and 20f in FIG. 10 are set so as to extend straight in the vertical direction (corresponding to a cylindrical inner surface).

  FIG. 12 shows a fifth embodiment of the present invention. In the present embodiment, the elastic body 40B (corresponding to the elastic body 40 in FIGS. 2 and 3) is formed in a cylindrical shape by an elastic member such as rubber. In the present embodiment, not only the connecting member 30 but also the connecting portion between the connecting member 30, the lower member 10, and the upper member 20 is covered by the cylindrical elastic body 40B, and foreign matters such as dust are connected from the outside. Intrusion around the member 30 can be prevented. That is, it is preferable for enabling the lower member 10 and the upper member 20 to swing smoothly with respect to the connecting member 30 over a long period of time.

  FIG. 13 shows a sixth embodiment of the present invention. In this embodiment, 10b and 20b to which the connecting member 30 is fitted are formed in a conical shape. In the present embodiment, it is preferable to secure a large contact area of the lower member 10 and the upper member 20 with respect to the connecting member 30 and to stably swing the lower member 10 and the upper member 20.

  FIG. 14 shows a seventh embodiment of the present invention, which has the same structure as that of FIG. 2 and FIG. 3 except for the elastic body 40. In this embodiment, a plurality (eight in the embodiment) of elastic bodies 40C (corresponding to the elastic body 40) are provided at intervals in the circumferential direction so as to surround the connecting member 30. As the elastic body 40C, for example, a small coil spring, or one formed in a columnar shape (preferably a cylindrical shape) by an elastic member such as rubber can be used.

  FIG. 15 shows an eighth embodiment of the present invention. In the present embodiment, the shape of the connecting member 30B (corresponding to the connecting member 30) is changed. In other words, the connecting member 30B has a structure in which spherical concave portions 30a are formed in the central portions of the lower surface and the upper surface of the connecting member 30B that is formed into a thick plate shape.

  At the center of the upper surface of the lower member 10, a spherical (partial spherical) protrusion 10g that fits into the lower recess 30a is formed. Similarly, a spherical protrusion 20g that fits into the upper recess 30a is formed at the center of the lower surface of the upper member 20. As described above, in this embodiment, the lower member 10 and the upper member 20 are connected to the connecting member 30B in a state where the lower member 10 and the upper member 20 are completely in spherical contact with each other. This is preferable in ensuring the movement.

  16 and 17 show a ninth embodiment of the present invention. In the present embodiment, a plurality of partial spherical protrusions 10 h are formed so as to protrude from the lower surface 10 a of the lower member 10. In the embodiment, a total of five protrusions 10h are formed, one at the center of the lower surface 10a and four at equal intervals in the circumferential direction at the peripheral edge of the lower surface 10a.

  Similarly, a plurality of partial spherical projections 20h are formed so as to protrude from the upper surface 20a of the upper member 20. In the embodiment, a total of five protrusions 20h are formed, one at the center of the upper surface 20a and four at the circumferential edge of the upper surface 20a at equal intervals in the circumferential direction.

  In the present embodiment, in a normal time when no earthquake occurs, the sliding member 1 has upper and lower guide members 50, 60 having two upper and lower portions of the partially spherical projections 10h and 20h located at the center. In contact with the sliding surfaces 50a and 60a. As a result, as in the case of FIG. 10, the seismic isolation action is performed by the rolling motion at the initial stage of a small earthquake or a large earthquake. Of course, when a large horizontal shaking occurs due to an earthquake, the sliding member 1 is tilted and a seismic isolation action is performed. At this time, the plurality of (three) protrusions 10h on the lower side are in contact with the lower guide surface 50a, and the plurality of (three) protrusions 20h on the inner side are in contact with and slide on the upper guide surface 60a. Therefore, it is preferable for increasing the sliding resistance (increasing the seismic isolation effect). The number of protrusions 10h (the same applies to 20h) can be selected as appropriate (for example, selected in the range of about 4 to 40).

  Although the embodiments have been described above, the present invention is not limited to the embodiments, and appropriate modifications can be made within the scope of the claims. In all the embodiments, the lower member 10 and the upper member 20 can be configured as a common member so that the upper and lower sides can be used interchangeably. Needless to say, the lower member 10 and the upper member 20 may be a dedicated member having a different shape and size, for example, without using the common member.

  In each embodiment, some of them can be combined as appropriate. For example, in FIGS. 12, 13, and 15, an elastic body 40 made of a coil spring can be used instead of the cylindrical elastic body 40B made of an elastic member, and conversely, FIGS. In FIG. 11, a cylindrical elastic body 40B made of an elastic member can be used instead of the elastic body 40 made of a coil spring.

  A plurality of elastic bodies 40 </ b> C as shown in FIG. 14 can be applied in the embodiments of FIGS. 3, 7, 10, 11, 12, 13, and 15. Furthermore, the spherical contact relationship between the lower member 10 and the upper member 20 with respect to the connecting member 30B as shown in FIG. 15 can also be applied to the embodiments shown in FIGS. 3, 7, 12, and 13. In order to achieve this spherical contact, for example, in the embodiments shown in FIGS. 3, 12, and 13, the recesses 10b and 20b can be formed in a spherical shape (partial spherical shape) (the concavo-convex relationship in FIG. 15 is reversed). Equivalent). The protrusions 10h and 20h shown in FIGS. 16 and 17 can be applied to the embodiments shown in FIGS. 3, 12, and 13, for example. Further, only the central protrusions 10h and 20h can be formed (the protrusions 10h and 20h are not provided at the peripheral part), and conversely, only the peripheral protrusions 10h and 20h can be formed (the central part). No protrusions 10h, 20h).

  Plural types of connecting members 30 (30B) having different heights can be prepared to cope with differences in height (up and down intervals) between the upper and lower guide members 50 and 60. In order to cope with the difference in height (vertical interval) between the upper and lower guide members 50 and 60, the connecting member 30 (30B) can be configured to be adjustable in the vertical height. Specifically, the connecting member 30 (30B) can be configured, for example, as an upper and lower divided structure that is screwed together. 3, 7, 10, 11, and 12, the spherical connecting member 30 has a spherical shape (partial spherical shape) only at its upper end and lower end, and its intermediate portion is a simple cylindrical shape. You can also do things. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

  The present invention is preferable for effectively obtaining a seismic isolation effect.

1: Sliding member 10: Lower member 10a: Lower surface 10b: Fitting recess (for connecting member)
10c: mounting recess (for elastic body)
10d: Central protrusion (FIGS. 6 and 7)
10e: Radial ridges (FIGS. 6 and 7)
10 g: protrusion (FIG. 14)
10h: protrusion (FIGS. 16 and 17)
20: Upper member 20a: Upper surface 20b: Fitting recess (for connection)
20c: mounting recess (for elastic body)
20d: Central protrusion (FIGS. 6 and 7)
20e: Radial ridges (FIGS. 6 and 7)
20 g: protrusion (FIG. 14)
20h: protrusion (FIGS. 16 and 17)
30: Connecting member 30B: Connecting member (FIG. 14)
30a: recess (for connection)
40: Elastic body 40B: Elastic body (FIGS. 11, 12, and 14)
40C: Elastic body (FIG. 13)
50: Lower guide member 50a: Sliding surface 60: Upper guide member 60a: Sliding surface

Claims (14)

A lower guide member that is used by being fixed to the base member side, and whose upper surface is a sliding surface;
An upper guide member that is used by being fixed to an upper structure disposed above the base member, and whose lower surface is a sliding surface;
A sliding member interposed between the lower guide member and the upper guide member;
Have
The sliding member is configured as an assembly of a lower member, an upper member, a connecting member, and an elastic body configured separately from each other.
The lower member has a convex lower surface that comes into contact with the lower guide member, and is connected to the connecting member so as to be swingable in a 360-degree direction,
The upper member has a convex upper surface that comes into contact with the upper guide member, and is connected to the connecting member so as to be swingable in a 360-degree direction,
The elastic body is interposed between the lower member and the upper member, and elastically supports the upper member with respect to the lower member.
A seismic isolation unit characterized by that. In claim 1,
The seismic isolation unit, wherein the lower member and the upper member are fitted to the connecting member via a spherical surface. In claim 2,
The connecting member is a sphere,
The lower member and the upper member are formed with recesses that fit into the connecting member.
A seismic isolation unit characterized by that. In claim 2,
The connecting member is a sphere,
Each of the lower member and the upper member is formed with a fitting hole to be fitted to the connecting member, and the lower end portion of the connecting member protrudes downward from the lower end of the lower member, The upper end portion of the connecting member protrudes upward from the upper end of the upper member.
A seismic isolation unit characterized by that. In any one of Claims 1 thru | or 4,
The seismic isolation unit, wherein the elastic body is annular so as to surround the connecting member. In claim 5,
The seismic isolation unit, wherein the elastic body is a coil spring. In claim 5,
The seismic isolation unit, wherein the elastic body is formed in a cylindrical shape by an elastic member. In any one of Claims 1 thru | or 4,
A plurality of the elastic bodies are provided at intervals in the circumferential direction so as to surround the connecting member. In any one of Claims 1 thru | or 8,
A seismic isolation unit, wherein a plurality of radial ridges extending radially are formed on the lower surface of the lower member and the upper surface of the upper member at intervals in the circumferential direction. In any one of Claims 1 thru | or 8,
A seismic isolation unit, wherein a plurality of partial spherical projections are formed on the lower surface of the lower member and the upper surface of the upper member, respectively. In any one of Claims 1 thru | or 10,
The seismic isolation unit, wherein the lower member and the upper member are common members. In any one of Claims 1 thru | or 11,
The seismic isolation unit, wherein the sliding surface of the lower guide member and the sliding surface of the upper guide member are respectively concave. A sliding member for a seismic isolation unit interposed between a lower guide member and an upper guide member,
It is configured as an assembly of a lower member, an upper member, a connecting member, and an elastic body that are configured separately from each other.
The lower member has a convex lower surface that comes into contact with the lower guide member, and is connected to the connecting member so as to be swingable in a 360-degree direction,
The upper member has a convex upper surface that comes into contact with the upper guide member, and is connected to the connecting member so as to be swingable in a 360-degree direction,
The elastic body is interposed between the lower member and the upper member, and elastically supports the upper member with respect to the lower member.
Sliding member for seismic isolation unit In claim 13,
The seismic isolation unit, wherein the lower member and the upper member are fitted to the connecting member via a spherical surface.

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