JP3818408B2 - Structure of base-isolated floor bearings and extension bearing members for base-isolated floor bearings - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a base isolation floor support and an extended support member for the base isolation floor support.
[0002]
[Prior art]
Among the double floor type seismic isolation floor structures, there is one as shown in Japanese Patent Publication No. 8-19758. That is, a plurality of center support members having a low friction on the upper surface are installed on the floor slab at predetermined intervals in the vertical and horizontal directions, and the slide panels so as to cover the center support members with respect to the respective center support members. Is arranged so that the slide panel is slidable in the horizontal direction with respect to the center support member. From each slide panel, a support column is erected, and a floor panel constituting an indoor floor is supported by the support column.
[0003]
In the above publication, the adjacent slide panels are connected to each other by a joint beam, and the slide panel and the joint beam can be displaced horizontally in the horizontal direction with respect to the floor slab as a whole. It is disclosed that the lower structure is formed. In the above publication, the center support member is supported on a dimple base fixed to a floor slab, and supported on the dimple base so as to be swingable in all directions, and the upper surface is flat and has low friction. It is also disclosed that the slide panel is constituted by a sliding member on which the slide panel is slid.
[0004]
In the above-mentioned publication, the center support member having a small area is usually covered by the slide panel having a large area, that is, the sliding portion is covered by the slide panel. Therefore, foreign matter such as dust is prevented from adhering to the sliding portion, which is preferable in obtaining a desired seismic isolation effect in the event of an earthquake. Further, the space between the slide panel and the floor panel can be effectively used as an arrangement space for wiring or the like while reducing the vertical distance between the slide panel and the floor panel.
[0005]
[Problems to be solved by the invention]
By the way, when an earthquake that shakes greatly in the horizontal direction occurs, the slide panel is greatly displaced in the horizontal direction with respect to the center support member. It will fall off from the support member. After the slide panel is removed from the central support member, effective seismic isolation cannot be expected, and some countermeasures are desired in this respect. Although it is conceivable to sufficiently increase the area of the slide panel, it is not preferable because the manufacturing and construction costs increase and the weight of the movable floor increases.
[0006]
The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a seismic isolation floor that can sufficiently obtain a seismic isolation effect even after the slide panel is dropped from the center support member. It is to provide the structure of the bearing.
A second object of the present invention is to provide an extended bearing member for a seismic isolation floor bearing used for obtaining a sufficient seismic isolation effect even after the slide panel is removed from the center bearing member.
[0007]
[Means for Solving the Problems]
In order to achieve the first object, the present invention provides the following as a first solution. That is,
A plurality of center support members whose upper surfaces have low friction are installed on the floor slab at predetermined intervals, and slide panels are arranged on the respective center support members so as to cover the center support members. In the structure of the base-isolated floor bearing part in which the panel is slidable horizontally with respect to the central bearing member,
On the floor slab, an extension support member is installed that is positioned around each center support member and has an upper surface with low friction and elongated in the horizontal direction,
The slide panel is supported by the extended support member when the slide panel is relatively displaced in any direction in the horizontal direction with respect to the center support member;
It is like that. Preferred embodiments based on the above solution are as described in claims 2 to 8 and claim 10 in claims.
[0008]
In order to achieve the first object, the present invention provides the second solution as follows. That is,
A plurality of dimple bases are fixed on the floor slab at equal intervals in the vertical and horizontal directions orthogonal to each other in the horizontal direction,
On each of the dimple bases, a sliding member having a flat upper surface and low friction is placed so as to be swingable in all directions,
In the structure of the base-isolated floor support portion in which a slide panel is arranged so as to cover the sliding member with respect to each sliding member, and the sliding panel is slidable in the horizontal direction with respect to the sliding member.
On the floor slab, an extension support member is installed that is positioned around each of the dimple bases, has an upper surface with low friction, and is elongated in a straight line in the horizontal direction.
When the upper surface height position of the extension support member is set to be lower than the upper surface of the sliding member and higher than the dimple base, and the slide panel is supported by the sliding member The floating panel is in a floating state with respect to the extended support member,
The extension support members are arranged to extend radially at least around each of the dimple bases, and each of the extension support members is connected to another extension support member or a dimple base,
The slide panel is supported by the extension support member when the slide panel is largely displaced in an arbitrary direction in the horizontal direction with respect to the slide member and falls off the slide member;
It is like that. A preferred mode based on the above solution is as described in claim 10 in the scope of claims.
[0009]
In order to achieve the second object, the present invention provides the following solution. That is,
It consists of a main body made of a metal channel material and an upper surface member made of a low friction member covering the upper surface of the main body, and is formed so as to be elongated in a straight line as a whole,
The main body includes an upper wall portion, a pair of left and right side wall portions extending downward from each end portion in the width direction of the upper wall portion, a flange portion extending from the lower end of each side wall in the width direction, and the upper wall portion. A first locking hole formed, and a second locking hole formed in the side wall,
The upper surface member includes an upper wall portion, a locking projection portion protruding from the lower surface of the upper wall portion, a pair of left and right leg portions extending downward from each end in the width direction of the upper wall portion, and the leg A locking claw portion formed at the tip of the portion,
The locking protrusion is fitted into the first locking hole, and the horizontal relative displacement of the upper surface member with respect to the main body is firmly restricted,
The upward displacement of the upper surface member with respect to the main body is firmly regulated by fitting the locking claws into the second locking holes.
It is like that.
[0010]
【The invention's effect】
According to claim 1, in the event of an earthquake, the slide panel usually slides on the center support member to obtain a seismic isolation effect, and a large earthquake that shakes greatly in the horizontal direction occurs, causing the slide panel to be the center support member. When the slide panel is dropped, the slide panel slides on the extension support member, and at this time, the seismic isolation effect can be obtained. Further, since the extended support member is elongated, that is, it is possible to reliably support the slide panel dropped from the center support member only by partially installing it in the space between the center support members.
[0011]
According to the second aspect, the number of the extension support members extending from the respective center support members is reduced as much as possible, and the slide panel dropped from the center support member is reliably supported by the extension support members.
According to the third aspect of the present invention, the installation place of the extended support member is a form arranged in a quadrangle defined by each center support member arranged along the vertical and horizontal straight lines. By using a plurality of types of extension support members having different lengths, an arrangement capable of reliably supporting the slide panel can be easily obtained. In particular, since the extension support members are straight, the construction and the manufacture thereof are simple, and each extension support member is connected to another extension support member or the center support member, so that the installation thereof should be secure. it can.
[0012]
According to the fourth aspect, it is possible to provide an arrangement form of the extension support members for reliably supporting the slide panel while minimizing the number of extension support members extending from one central support member.
According to the fifth aspect, it is preferable to easily connect the three extension support members by using the connection fitting having the three connection portions.
According to the sixth aspect, by connecting the center support member and the extension support member by the concave and convex fitting in the vertical direction, the connection is easy, and it is preferable for preventing mutual displacement in the horizontal direction. Become.
[0013]
According to the seventh aspect of the present invention, the extended support member is divided into the main body portion and the upper surface member made of the low friction member, so that the main body portion is made of a highly rigid material and an expensive low friction member is used. This is preferable in reducing the amount. Further, by using the locking holes and the locking projections, the main body member and the upper surface member can be firmly connected so as not to be displaced in the horizontal direction even when receiving a force when the slide panel slides. it can.
[0014]
According to the eighth aspect, even if the floor slab has unevenness and the dimple base is inclined, the sliding member is slid by utilizing the swinging of the sliding member in all directions with respect to the dimple base. At this time, even if the extended support member is inclined due to unevenness, it is at a position lower than the sliding member and does not interfere with the slide panel. Also, when the slide panel is once dropped from the sliding member and transferred to the extension support member, and then swayed back in the direction approaching the dropped sliding member, the sliding panel pushes the sliding member out of the dimple base. Thus, the slide panel can be supported by the extension support member in the push-out direction, and the seismic isolation function is not impaired due to the step difference from the slide member.
[0015]
According to the ninth aspect, an effect corresponding to the first and eighth aspects can be obtained. In addition, by making the extension support member straight and facilitating its manufacture, the extension support member is arranged radially around the dimple base so that the slide panel dropped from the sliding member can be securely supported by the extension support member. can do. Further, by connecting the extension support member to another extension support member or the center support member, it is possible to secure the installation.
According to the tenth aspect of the present invention, adjacent slide panels are connected to each other by a joint beam, and as a whole, a rigid lower structure that can be displaced horizontally with respect to the floor slab and supports the floor panel. The body can be configured.
[0016]
According to the eleventh aspect of the present invention, there is provided an extended support member for supporting the slide panel dropped from the center support member. The extended support member is linear, and includes a main body portion and a low friction member. By dividing the upper surface member, it is preferable to obtain an extended support member having a desired cross-sectional shape while reducing the amount of expensive low friction members used. Further, the first locking hole and the locking projection are used to firmly connect the main body member and the upper surface member so as not to be displaced in the horizontal direction even when receiving a force when the slide panel slides. be able to. Further, it is preferable to prevent the upper surface member from coming off from the main body member by utilizing the second locking hole and the locking claw portion.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIGS. 1 to 3, the floor of the room S installed on the floor slab U is composed of a movable floor 1 that can be displaced in the horizontal direction and a fixed floor 2 that is fixed. The movable floor 1 is installed so as to have a predetermined distance from the side wall 3 of the chamber S, and the fixed floor 2 is located around the entire movable floor 1. The movable floor 1 and the fixed floor 2 are overlapped with each other by using an over panel 4 provided at the peripheral edge of the movable floor 1, and when the movable floor 1 is displaced in the horizontal direction, The amount of wrapping is changed.
[0018]
As shown in FIG. 4, the movable floor 1 is urged so as to be positioned substantially at the center of the chamber S by a return spring 5 made of a coil spring provided around the movable floor 1. The return spring 5 extends in the horizontal direction and is installed between the movable floor 1 and the floor slab U. A damper 6 is fixedly installed on the floor slab U around the movable floor 1 so as to have a predetermined distance from the movable floor 1, and when the movable floor 1 is displaced beyond the allowable range in the horizontal direction, the damper 6 is fixed. Attenuating action is performed by contact. The damper 6 is a friction type, and when the pressure receiving member 6A is pushed into the main body case 6B fixed to the floor slab U, a large frictional force is generated to perform a damping action. No maintenance after installation is required, but an oil damper or the like can also be used. In FIG. 4, an extension support member described later is omitted.
[0019]
In the embodiment, the movable floor 1 has a quadrangular shape, more specifically, a square shape according to the shape of the chamber S, but the shape of the movable floor 1 can be set as appropriate. In addition, although a plurality of return springs 5 and dampers 6 are provided for each side of the movable floor 1, the number of return springs 5 and dampers 6 can be set as appropriate.
[0020]
As shown in FIG. 2, the movable floor 1 is supported by a center support member 11 so as to be displaceable in the horizontal direction with respect to the floor slab U. The center support member 11 is fixed to the floor slab U at a part where a plurality of vertical lines and a plurality of horizontal lines intersect with each other at equal intervals in the vertical and horizontal directions, that is, at equal intervals (for example, 60 cm). The upper surface is flat and has low friction.
[0021]
The movable floor 1 has a plurality of slide panels 12, and the slide panels 12 are provided corresponding to the center support members 11. That is, the slide panel 12 is also located at equal intervals in the vertical and horizontal directions (one slide panel 12 is set for one central support member 11). The bottom surface of the slide panel 12 is a flat sliding surface. FIG. 5 shows the lower surface of the slide panel 12, and the portion shown in FIG. 5 by being hatched is the above-mentioned sliding surface that is slid relative to the center support member 11, and the slide panel It is the lowest of the twelve. Such a slide panel 12 (sliding surface thereof) has a sufficiently larger area than the center support member 11. More specifically, the area is sufficiently large so that adjacent slide panels are close to each other. When the movable floor 1 is displaced in the horizontal direction, the slide panel 12 (the lower surface) is slid with respect to the center support member 11 (the upper surface).
[0022]
Adjacent slide panels 12 are connected to each other by a joint beam 13 formed by processing a metal plate such as an iron plate. Thereby, each slide panel 12 is comprised as a strong integrated object via the joint beam 13, and such a strong integrated object comprises the flat lower structure. The slide panel 12 and the joint beam 13 are connected using a fixture such as a bolt.
[0023]
From each slide panel 12, a column 14 is erected, and a floor panel 15 is fixed to each column 14. The floor panel 15 is configured by arranging panel structure bodies 15a having standard dimensions (for example, 60 cm square) in parallel, and is fixed to the column 14 for each corner portion of the panel structure body 15a. On the floor panel 15, devices such as a computer that dislike vibration are installed. Thus, the center interval of the four adjacent columns 15 is set corresponding to the dimension of the panel structure 15a. In other words, the vertical and horizontal equidistant installation of the center support member 11 or the slide panel 12 is set according to the dimensions of the panel structure 15a that is a standard size square.
[0024]
On the floor slab U, an extension support member 21 is installed so as to be positioned around each center support member 11. The extension support member 21 is used to support the slide panel 12 when the slide panel 12 is detached from the center support member 11, and the upper surface thereof has a low friction. That is, the extension support member 21 is set slightly lower than the center support member 11, and when the slide panel 12 is supported by the center support member 11, the slide panel 12 flows to the extension support member 21. Ting status.
[0025]
Each of the extended support members 21 is formed in an elongated linear shape, and a plurality of types having different lengths are used. A preferred installation form of the extension support member 21 will be described with reference to FIG. First, as the extension support member, the longest first extension support member 21A, and the second extension support member 21B and the third extension support member 21C that are sufficiently shorter than the first extension support member 21A are used. The adjacent central support members 11 are connected to each other by the first extended support member 21A so as to extend in the horizontal direction of FIG. 6 in either the vertical direction or the horizontal direction. In the other of the longitudinal direction and the lateral direction (vertical direction in FIG. 6), in the middle position between the adjacent central bearing members 11, parallel to the first extended bearing member 21 </ b> A and in the middle in the longitudinal direction of the first elongated bearing member 21 </ b> A The second extension support member 21 </ b> B is arranged so as to be located at the position.
[0026]
One end of the second extension support member 21B and the two center support members 11 located closest to the one end of the second extension support member 21B are connected by the third extension support member 21C, respectively. The other end of the second extension support member 21B and the two center support members 11 located closest to the other end of the second extension support member 21B are connected by the third extension support member 21C, respectively. Yes.
[0027]
Thus, when paying attention to one central support member 11, a total of six extension support members 21 (two first extension support members 21A and four third extension support members 21C) extend radially. Are arranged as follows. In addition, about the center support member 11 in a horizontal direction edge part, in the direction (direction opposite to the center support member 11 adjacent to a horizontal direction) toward the fixed floor 2 side, on the extension line of 21 A of 1st extension support members The fourth extension support member 21D, which is substantially half the length of the first extension support member 21A, is arranged because the adjacent center support member 11 does not exist on the fixed floor 2 side. The fourth extension support member 21D has substantially the same meaning as the first extension support member 21A.
[0028]
The connection between the second extension support member 21B and the third extension support member 21C described above is performed using a connection fitting 22 as will be described later. Further, as will be described later, the connection with the extension support member 21 (the first extension support member 21A, the fourth extension support member 21D, or the third extension support member 21C) with respect to the center support member 11 is an uneven fitting type in the vertical direction. Has been done by.
[0029]
A part of the slide panel 12 provided for each center support member 11 is indicated by a one-dot chain line in FIG. 6, but the slide panel indicated by reference numeral 12A is in a normal position (the center support member 11 is substantially at the center). Is located). In addition, the slide panel indicated by reference numeral 12B is greatly displaced in the horizontal direction and dropped from the center support member 11 and is supported by the extension support member 21 (the sliding surface is completely detached from the center support member 11). It is. Even if the slide panel 12 is greatly displaced in any arbitrary direction in the horizontal direction with respect to the center support member 11, the slide panel 12 is reliably supported by the extension support member 21. The extended support member 21 is the same even if the vertical and horizontal arrangement relations are reversed (only the state obtained by rotating the state of FIG. 6 by 90 degrees clockwise or counterclockwise).
[0030]
Here, the arrangement of the extended support member 21 can be appropriately set in addition to the embodiment shown in FIG. For example, while the first extended support member 21A is provided in the same manner as in FIG. 6, instead of the second extended support member 21B and the third extended support member 21C, the central support members 11 that are adjacent to each other in the oblique direction are connected to each other. The extension support member 21A may be connected to an extension support member that extends at an angle of 45 degrees with respect to the extension support member 21A. In this case, when paying attention to one central support member 11, a total of eight extended support member portions extend radially at intervals of 45 degrees in the circumferential direction. In order to securely support the slide panel 12 by the extension support member 21 when it is greatly displaced in the horizontal direction while minimizing the number of extension support members 21 extending radially from one central support member 11 as shown in FIG. The state is advantageous.
[0031]
7 to 9 show a detailed example of the extension support member 21, but the illustrated example shows the third extension support member 21C. The first extension support member 21A and the second extension support member 21B are basically the same as the third extension support member 21C, but the third extension support member 21C is different from the first extension support member 21A. That is, extension flange portions 38 (and connection projections 39), which will be described later, are formed at both ends, and connection openings 37, which will be described later, are formed at both ends of the second extension support member 21B.
[0032]
The extension support member 21, that is, the third extension support member 21 </ b> C is basically divided into a main body 31 and an upper surface member 32, and is configured by coupling and integrating both 31 and 32. The main body 31 is formed as a channel material structure by processing a metal plate such as an iron plate or a synthetic resin excellent in rigidity, and is substantially downward from the left and right ends of the upper wall portion 31a and the upper wall portion 31a. It has a pair of left and right side wall portions 31b extending downward at right angles and a pair of left and right flange portions 31c extending from the lower end of each side wall portion 31b in opposite directions. The extension support member 21 can also be fixed to the floor slab U with an adhesive at the flange portion 31c.
[0033]
A plurality of (two in the drawing) first locking holes 33 extending in the longitudinal direction are formed at predetermined intervals in the longitudinal direction in the upper wall portion 31a of the main body 31. Each side wall 31b of the main body 31 is formed with a plurality of (two in the drawing) second locking holes 34 that are elongated in the longitudinal direction at predetermined intervals in the longitudinal direction.
[0034]
The upper surface member 32 is formed of a low friction member, for example, a low friction synthetic resin such as Teflon, nylon, or polyacetal, but is sufficiently shorter than the length of the main body 31. That is, the extended support member 21 is configured by assembling a plurality of upper surface members 32 (two in FIGS. 7 and 8) with respect to one main body 31. In other words, as described above, when the plurality of types of extension support members 21A to 21D having different lengths are configured, only the length of the main body 31 is used, and the upper surface member 32 is changed in the number of assembly. (The upper surface member 32 is completely common or almost common between the extension support members 21A to 21D having different lengths).
[0035]
The upper surface member 32 includes an upper wall portion 32a that covers the upper wall portion 31a of the main body 31, and a pair of left and right leg portions 32b that extend downward at substantially right angles from the left and right ends of the upper wall portion 32a. The pair of left and right leg portions 32b can be sufficiently elastically deformed in the left-right direction, which is the width direction. For this reason, the leg portion 32b is sufficiently shorter than the length of the upper wall portion 32a. And the latching claw part 32c which protruded toward the width direction inner side of the upper surface member 32 is formed in the lower end part of each leg part 32b. Further, a locking projection 32d that is elongated in the longitudinal direction is formed on the lower surface of the upper wall 32a. Note that the upper surface of the upper surface member 32 (the upper surface of the upper wall portion 32a) has a substantially circular arc shape such that the cross section gradually decreases toward the end in the width direction so as to protrude upward. The slide panel 12 is supported by line contact (reducing action of sliding resistance on the slide panel 12).
[0036]
The locking protrusion 32 d of the upper surface member 32 is tightly fitted in the first locking hole 33 of the main body 31. The leg portion 32 b of the upper surface member 32 extends along the outer surface of the side wall portion 31 b of the main body 31, and the locking claw portion 32 c of the upper surface member 32 is fitted and locked in the second locking hole 34 of the main body 31. The The upper surface member 32 is prevented from being separated upward from the main body 31 by the locking action of the locking claw portion 32 c with respect to the second locking hole 34. Further, the engaging protrusion 32 d is fitted into the first engaging hole 33, so that the relative displacement of the upper surface member 32 in the horizontal direction with respect to the main body 31 is firmly restricted. In addition to or instead of the locking action using the locking claw portion 32c, the main body 31 and the upper surface member 32 can be fixed by an adhesive.
[0037]
As shown in FIGS. 10 and 11, the extension support member 21 has an end plate portion 36 extending in the width direction on one end side in the longitudinal direction. The end plate portion 36 is connected to the internal space of the main body 31. An opening 37 is formed. FIG. 10 also shows an example of the connection fitting 22 that connects the second extension support member 21B and the third extension support member 21C. The connecting fitting 22 is formed by bending a metal plate such as an iron plate, for example, and has three connecting legs 22a extending radially. A pair of left and right rising portions 22b extending shortly upward from the left and right ends are formed at the distal end portion of each connecting leg portion 22a. The connecting leg portion 22a having the rising portion 22b is inserted into the connecting opening 37 of the extension support member 21 without rattling, and the connection is performed (see also FIG. 12).
[0038]
An extension flange portion 38 is integrally formed on the other end side in the longitudinal direction of the extension support member 21 at the same height as the flange portion 31c. The extension flange portion 38 has a connecting projection protruding upward. A portion 39 is formed (for example, formed by bulging a part of the extension flange portion 38 upward). The connection protrusion 39 is used for connection with the center support member 11 as described later.
[0039]
An example of the center support member 11 to which the extended support member 21 is connected is shown in FIGS. The center support member 11 is divided into a dimple base 41 and a sliding member 42 made of a low friction member placed on the dimple base 41 so that the dimple base 41 is formed on the floor slab U. Fixed. On the upper surface of the dimple base 41, a concave portion 41a formed in a spherical shape so as to be concave upward is formed. On the other hand, the lower surface of the sliding member 42 is formed in a spherical shape so as to protrude downward, and is placed in the concave portion 41 a of the dimple base 41. Thereby, the sliding member 42 can swing in all directions with respect to the dimple base 41. The upper surface of the sliding member 42 is a flat surface.
[0040]
The dimple base 41 has a flange portion 41b that extends in an annular shape as a whole at its outer peripheral edge. The flange portion 41b is formed with a plurality of connecting bulging portions 41c at intervals in the circumferential direction. The connecting bulge portions 41c are formed in six pieces corresponding to the number of the extended support members 21 to be connected, and are formed by partially bulging the flange portions 41b slightly upward. It is the shape opened to the outer peripheral side of 41b. And the connection hole 43 is formed in the upper wall part of the connection bulging part 41c.
[0041]
The dimple base 41 is fixed to the floor slab U by the flange portion 41b seated on the floor slab U. When the dimple base 41 is fixed to the floor slab U, the extension flange portion 38 of the extension support member 21 is inserted into the connection bulge portion 41c, and the above-described connection formed on the extension flange portion 38 is provided. The protrusion 39 is loosely fitted in the connection hole 43 formed in the connection bulge 41c. In this way, the extension support member 21 and the dimple base 41 are connected. In addition, while the connection protrusion part extended in the up-down direction is formed in the bulging part 41c for connection, the connection hole by which a connection protrusion part is fitted to the extension flange part 38 of the extension support member 21 can also be formed. .
[0042]
Here, as shown in FIG. 14, in the state where the dimple base 41 and the extension support member 21 are installed on the floor slab U, the maximum height of the extension support member 21 at the height from the floor slab U is set to H1. When the maximum height of the dimple base 41 is H2 and the height of the upper surface of the sliding member 42 placed on the dimple base 41 is H3, H2 <H1 <H3 is set. . As a result, when the slide panel 12 that has completely dropped from the center support member 11, that is, the sliding member 42, is transferred to and supported by the one-end extension support member 21, the slide panel 12 is displaced in a direction approaching the sliding member 42. The sliding member 42 is pushed out of the dimple base 41 by the outer peripheral edge of the panel 12, and thereafter, the sliding panel 12 is supported only by the extension supporting member 21.
[0043]
When the center support member 11 does not have the sliding member 42 separable from the dimple base 41, that is, the low friction portion constituting the upper surface portion of the center support member 11 is always in a fixed relationship with the floor slab U. In some cases, the end of the extended support member 21 on the side of the center support member 11 is inclined so as to gradually increase toward the center support member 11, and the height of the extension support member 21 in the immediate vicinity of the center support member 11 is set. The position can also be set so as to be substantially the same height as the height position of the upper surface of the center support member 11.
[0044]
It is also conceivable that the height of the extended support member 21 is made to coincide with the height of the upper surface of the center support member 11 over almost the entire length thereof. However, in this case, even if the horizontal displacement is small, the slide panel 12 slides with a considerably large area with respect to the extension support member 21, and the center support member 11 (originally has low friction). It is not preferable from the request that the slide panel 12 is slid only by the upper surface.
[0045]
Although the embodiments have been described above, the present invention can be appropriately modified within the scope described in the claims. Further, the object of the present invention is not limited to the description, but implicitly includes providing what is substantially preferable or described as an advantage.
[Brief description of the drawings]
FIG. 1 is a top view schematically showing an overall state of a double floor type base isolation floor structure to which the present invention is applied.
FIG. 2 is a partial cross-sectional side view showing an example of a seismic isolation floor support structure to which the present invention is applied.
3 is a partially cutaway top view of FIG. 2. FIG.
FIG. 4 is a perspective view showing a state of a slide panel, a return spring, a joint beam, and a floor panel, omitting an extension support member.
FIG. 5 is a bottom view of the slide panel.
FIG. 6 is a top view showing a preferred installation example of the extension support member with respect to the center support member.
FIG. 7 is a perspective view showing an example of an extended support member.
8 is an exploded perspective view of FIG.
9 is a cross-sectional view corresponding to line X9-X9 in FIG.
FIG. 10 is an exploded perspective view showing an example of a connection fitting and a state of connection of the connection fitting to an extension support member.
FIG. 11 is a perspective view showing a state in which a connecting metal fitting and an extended support member are connected.
12 is a cross-sectional view corresponding to line X12-X12 in FIG.
FIG. 13 is a top view of the dimple base and also shows the connection with the extension support member.
14 is a cross-sectional view corresponding to the line X14-X14 of FIG. 13, and also shows a state of connection with the extension support member.
[Explanation of symbols]
U: Floor slab
S: Room
1: Movable floor
3: Side wall of the room
11: Center support member
12: Slide panel
13: Joint beam
14: Prop
15: Floor panel
21: Extension bearing member
21A: First extension support member
21B: Second extension support member
21C: Third extension support member
21D: Fourth extension support member
22: Connecting bracket
22a: Fastening leg (connecting part)
31: Body
31a: Upper wall part
31b: side wall
31c: Flange part
32: Upper surface member
32a: Upper wall part
32b: Leg
32c: Locking claw part
32d: locking projection
33: First locking hole
34: Second locking hole
38: Extension flange
39: Locking protrusion
41: Dimple base
41a: recess
41c: bulging part for connection
42: Sliding member
43: Connecting hole

Claims (11)

A plurality of center support members whose upper surfaces have low friction are installed on the floor slab at predetermined intervals, and slide panels are arranged on the respective center support members so as to cover the center support members. In the structure of the base-isolated floor bearing part in which the panel is slidable horizontally with respect to the central bearing member,
On the floor slab, an extension support member is installed that is positioned around each center support member and has an upper surface with low friction and elongated in the horizontal direction,
The slide panel is supported by the extended support member when the slide panel is relatively displaced in any direction in the horizontal direction with respect to the center support member;
The structure of the seismic isolation floor bearing. In claim 1,
The structure of the seismic isolation floor support part, wherein the extension support members are arranged so as to extend radially from each of the center support members. In claim 1,
Each of the center support members is arranged at equal intervals in the vertical direction and the horizontal direction that are orthogonal to each other in the horizontal direction,
The extended support member is linear,
As the extended support member, a plurality of types having different lengths are used,
Each of the extension support members is connected to another extension support member or a center support member.
The structure of the seismic isolation floor bearing. In claim 3,
As the extension support member, a longest first extension support member, a second extension support member and a third extension support member that are sufficiently shorter than the first extension support member are used.
In either one of the vertical direction and the horizontal direction, adjacent center support members are connected by the first extension support member,
The second extension support is positioned so as to be parallel to the first extension support member and in the middle of the longitudinal direction of the first extension support member at an intermediate position between the adjacent center support members in the other longitudinal or lateral direction. The members are placed,
One end of the second extension support member and two central support members closest to one end of the second extension support member are connected by the third extension support member, respectively.
The other end of the second extension support member and the two center support members closest to the other end of the second extension support member are connected by the third extension support member, respectively.
The structure of the seismic isolation floor bearing. In claim 4,
Each of the end portions of the second extension support member and the two third extension support members to be connected to the end portions of the second extension support member respectively have three connection portions radially. A structure of a base-isolated floor bearing part, which is connected to each other by metal fittings. In claim 3 or claim 4,
A structure of a base-isolated floor support portion, wherein the center support member and the extension support member are connected by fitting them in an up-down direction. In claim 1,
The extension support member is constituted by a main body made of a channel material and an upper surface member made of a low friction member covering the upper surface of the main body,
A locking hole is formed on the upper surface of the main body,
A locking projection that is fitted into the locking hole is formed on the lower surface of the upper surface member,
The relative displacement in the horizontal direction of the upper surface member with respect to the main body is firmly restricted by the fitting of the locking hole and the locking projection.
The structure of the seismic isolation floor bearing. In any one of Claims 1 thru | or 7,
The center support member is mounted on a dimple base fixed to a floor slab, and is slidably mounted on the dimple base in all directions. And a sliding member to be slid,
The upper surface height position of the extended support member is set to be lower than the upper surface of the sliding member and higher than the dimple base.
The structure of the seismic isolation floor bearing. A plurality of dimple bases are fixed on the floor slab at equal intervals in the vertical and horizontal directions orthogonal to each other in the horizontal direction,
On each of the dimple bases, a sliding member having a flat upper surface and low friction is placed so as to be swingable in all directions,
In the structure of the base-isolated floor support portion in which a slide panel is arranged so as to cover the sliding member with respect to each sliding member, and the sliding panel is slidable in the horizontal direction with respect to the sliding member.
On the floor slab, an extension support member is installed that is positioned around each of the dimple bases, has an upper surface with low friction, and is elongated in a straight line in the horizontal direction.
When the upper surface height position of the extension support member is set to be lower than the upper surface of the sliding member and higher than the dimple base, and the slide panel is supported by the sliding member The floating panel is in a floating state with respect to the extended support member,
The extension support members are arranged to extend radially at least around each of the dimple bases, and each of the extension support members is connected to another extension support member or a dimple base,
The slide panel is supported by the extension support member when the slide panel is largely displaced in an arbitrary direction in the horizontal direction with respect to the slide member and falls off the slide member;
The structure of the seismic isolation floor bearing. In any one of Claims 1 thru | or 9,
A structure of a base-isolated floor bearing section, wherein the adjacent slide panels are connected to each other by a joint beam. It consists of a main body made of a metal channel material and an upper surface member made of a low friction member covering the upper surface of the main body, and is formed so as to be elongated in a straight line as a whole,
The main body includes an upper wall portion, a pair of left and right side wall portions extending downward from each end portion in the width direction of the upper wall portion, a flange portion extending from the lower end of each side wall in the width direction, and the upper wall portion. A first locking hole formed, and a second locking hole formed in the side wall,
The upper surface member includes an upper wall portion, a locking projection portion protruding from the lower surface of the upper wall portion, a pair of left and right leg portions extending downward from each end in the width direction of the upper wall portion, and the leg A locking claw portion formed at the tip of the portion,
The locking protrusion is fitted into the first locking hole, and the horizontal relative displacement of the upper surface member with respect to the main body is firmly restricted,
The upward displacement of the upper surface member with respect to the main body is firmly regulated by fitting the locking claws into the second locking holes.
An extension bearing member for a seismic isolation floor bearing.

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