JP4398191B2 - Seismic isolation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic isolation device installed between a supported body side and a support body side. More specifically, the present invention relates to a seismic isolation device having a return function that always returns the relative positional relationship between the supported body side and the support body side to a predetermined positional relationship.
[0002]
[Prior art]
Regarding this type of seismic isolation device, a rolling element is installed on one side of the supported body side or the support body side so as to be rotatable only around a predetermined axis, and a guide member for the rolling body is provided on the other supported body side or the support body side. When the supported body moves relative to the support body by changing the guide surfaces of those guide members in the vertical direction or by decentering the axis of the rolling body, the rolling body is guided by the guide member. An apparatus is disclosed that is configured to roll upward to gradually raise the supported body side and to provide a return function by upward displacement of the supported body side (see Patent Document 1). However, since the seismic force acts regardless of the direction of the guide member, in the case of the above-described prior art, the rolling element or the guide member is provided with means for preventing the wheel from falling off so that the rolling element does not come off the guide member. It was necessary to apply. In addition, even if a derailment prevention means such as a flange portion is applied, if a sudden seismic action in a direction different from the guide direction of the guide member is applied, the side surface of the flange and the other member will contact rapidly. There was a technical problem that the free rolling of the rolling element was hindered by the drag, and the relative movement with the guide member was suddenly stopped or the smooth relative movement was harmed. .
[0003]
[Patent Document 1]
Japanese Examined Patent Publication No. 6-74609 [0004]
[Problems to be solved by the invention]
The present invention was developed in order to solve the above-described problems of the prior art, and without applying rolling prevention means such as a flange portion to the rolling means or the guide member as in the prior art, The rolling means is accurately guided along the guide direction of the guide member, and smoothly moves relative to the sudden earthquake action in a direction different from the guide direction so that the rolling means and the guide member move smoothly. The purpose of this is to provide a seismic isolation device that does not cause damage.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the invention of claim 1, the guide support edge formed so that the interval between the inner edges spaced apart from each other gradually decreases from the center toward both outer ends. And a tapered rolling part having a circular cross section formed in a tapered shape toward the outer side that rolls in contact with the respective guide support edge of the guide rail from the inner side, A technique of providing a return function by a displacement in a height direction generated in the tapered rolling part itself when the tapered rolling part rolls from the center part to the outer end side along the guide support edge part. Adopted means. As described above, according to the present invention, a tapered rolling part having a circular cross section such as a taper formed outwardly is brought into contact with each guide support edge formed on the guide rail, thereby being covered. Since it is configured to support the gravity on the support side, the displacement in the direction orthogonal to the traveling direction of the rolling part is restricted by the guide support edges on both sides, so the supporting side is supported via the rolling part. Gravity can be transmitted to the support side more stably. Moreover, even if there is no flange portion for preventing the wheel removal as in the prior art, the rolling portions are accurately guided along the guide rails by the guide support edge portions on both sides. Furthermore, even when a sudden earthquake action in a direction different from the guide direction of the guide rail is applied, the contact position between the guide support edge and the tapered rolling part is slightly displaced in the direction perpendicular to the guide direction and then returned. By doing so, a smooth and flexible response is possible. The tapered rolling part referred to in the invention of each claim is not only a linear tapered surface or a conical surface, but also a curved surface curved in a convex shape or a concave shape. It may be anything that changes into a shape.
[0006]
According to a second and third aspect of the invention, instead of the tapered rolling part, a rotation support roller that is installed so as to be able to roll in contact with an inclined state with respect to each guide support edge of the guide rail. Was adopted to provide a similar return function. Further, in the inventions according to claim 4 and claim 5 , the circular cross section is formed so as to be able to roll around the vertical axis in contact with each guide support edge of the guide rail, and to be tapered in the vertical axis direction. A tapered rolling part consisting of
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The seismic isolation device according to the present invention can be widely applied as a seismic isolation device for various buildings by being installed between the ground side which is the support side and the housing side which is the supported side. In addition, for example, when installed under the floor of a room in an existing or new building such as a computer room to protect hardware equipment in the room, or installed in an existing or new building The present invention can be widely applied to the case where it is installed between a structure for supporting an exhibit to be displayed and a floor portion to protect the exhibit such as a work of art. Whether the guide support edge portion is constituted by the inner edge portion or the outer edge portion, the basic guide function of the present invention can be achieved if at least one pair is aligned. . The tapered rolling portion may be configured as one member as a whole as long as it can support the gravity on the supported body side by abutting with the guide support edge, or the guide support edges on both sides. It may be configured to be separated according to the above. Further, the tapered rolling part may be formed such that the tapered rolling part is partially formed at the end of the rolling element, or may be formed entirely of a tapered rolling part. Further, when the tapered rolling parts are configured to be separated corresponding to the guide support edges on both sides, the both tapered rolling parts are integrally configured via a shaft body or the like. Both of the rolling parts may be configured to roll integrally, or may be configured to be independent and independent so that each tapered rolling part can roll freely. .
[0008]
1 and 2 are schematic explanatory views showing the basic operation principle of the present invention. FIG. 1 is a perspective view showing a first basic form of the present invention, and FIG. 2 is a front view thereof. As shown in the figure, in the first basic form, the opposed inner edges of the guide rails 1 and 2 that are spaced apart from each other are used as guide support edges 3 and 4, and the guide support edges 3 and 4 are opposed to each other. In this example, which is tapered toward the outside formed on both sides of the rolling element 5, the tapered tapered rolling portions 6 and 7 are brought into contact with each other and the supported body is supported via the rolling element 5. By doing so, a seismic isolation device having a return function is configured. The guide support edge portions 3 and 4 are formed such that the distance between them is gradually reduced from the central portion toward both outer end portions as shown in FIG. 1, and as shown in FIG. Is provided with a return function to return to the original central part by the displacement in the height direction generated in the rolling element 5 itself when rolling from the central part to the outer end side along the guide support edge parts 3 and 4. become. Therefore, when this first basic form is specifically applied, the guide rails 1 and 2 are installed on one of the support side or the supported side, and the shaft portion formed at an appropriate position of the rolling element 5 is placed on the other side. A seismic isolation device having a return function is installed between the support side and the supported body by rotatably supporting the support side or the supported side. Incidentally, although the guide rail is separated into two in this example, it goes without saying that two guide support edges separated from each other by one guide rail may be formed. Furthermore, as a specific form for gradually reducing the distance between the guide support edge portions 3 and 4 of the guide rail from the center portion toward both outer end portions, the guide support edge portions 3 and 4 are used. Can be formed in a curved shape such as an arc shape as shown in the figure, or it can be connected in a V shape at the center, or it can be connected in a U shape with a rounded connection. can do.
[0009]
FIG. 3 is a perspective view showing a conventional form as a comparative example , and FIG. 4 is a front view thereof. As shown in the figure, in the case of this comparative example, the outer edge portions spaced apart from each other on the guide rail 8 are used as the guide support edge portions 9 and 10, and the rolling elements 11 with respect to these guide support edge portions 9 and 10. In this example formed in a tapered shape toward the inside formed on both sides of the roller, the tapered tapered rolling portions 12 and 13 are brought into contact from the outside, and the supported body side is supported through the rolling elements 11. This constitutes a seismic isolation device having a return function. The guide support edge portions 9 and 10 of this embodiment are formed so that the distance between them gradually increases from the central portion toward both outer end portions as shown in FIG. 3, and as shown in FIG. When the moving body 11 rolls along the guide support edge portions 9 and 10 from the central portion to the outer end side, a return function to return to the original central portion is provided by the displacement in the height direction generated in the rolling body 11 itself. Will be. Incidentally, in the case of this conventional comparative example, when the traveling direction of the rolling element 11 coincides with the guiding direction of the guide rail 8, that is, the rolling axis of the rolling element 11 is orthogonal to the guiding direction of the guide rail 8. In this state, there is no problem because the respective tapered rolling portions 12 and 13 that contact the left and right guide support edge portions 9 and 10 formed of the outer edge portions proceed in the left and right directions, but there is no problem. Is inclined, the rolling diameter of the portion where the tapered rolling part 12 or 13 on the side that advances forward is brought into contact with the guide support edge part 9 or 10 is increased (the other tapered rolling part). On the contrary, the rolling diameter is reduced in the portion 13 or 12, and the traveling distance is larger than that of the other tapered rolling portion 13 or 12, so that the inclined state is further increased and guided by the guide rail 8. Out of orbit, sometimes ahead Tapered rolling portion 12 or 13 there is also a risk of derailing from running on the guide support edges 9 or 10. On the other hand, in the case of the first basic form of the present invention described above, when the rolling axis of the rolling element 5 is inclined, the tapered rolling part 6 or 7 on the side that advances forward by the inclination is guided and supported. As a result, the rolling diameter of the portion in contact with the edge 3 or 4 is conversely reduced, and the distance traveled is smaller than that of the other tapered rolling portion 7 or 6, so that the rolling axis of the rolling element 5 is inclined. The function is reduced, and a trajectory return function for automatically returning to the trajectory guided by the guide rails 1 and 2 is provided.
[0010]
FIG. 5 is a longitudinal sectional view showing the main part of the second basic form of the present invention. In this second basic form, instead of the tapered rolling portion, as shown in the drawing, the second base configuration is in contact with the guide support edge portions 15 and 16 formed of the outer edge portions formed on the guide rail 14 in an inclined state. Rotating support rollers 17 and 18 configured to be able to roll are adopted, and the rotation support rollers 17 and 18 are rotated and supported when they roll along the guide support edge portions 15 and 16 from the center portion to the outer end side. It is configured to give a return function to return to the original central part by the displacement in the height direction generated in the roller support part 19 provided with the rollers 17 and 18. In addition, the guide support edge parts 15 and 16 in this example are formed so that the space | interval between mutual may become large gradually toward both outer end parts from a center part similarly to the said guide support edge parts 9 and 10. FIG. Further, instead of the guide support edges 15 and 16 adopting the outer edge, an inner edge is adopted, and like the guide support edges 3 and 4, the distance between them is changed from the center portion to both outer end portions. A configuration is also possible in which the rotary support rollers 17 and 18 are abutted from the inside by being formed so as to gradually become smaller. Incidentally, the rotation support rollers 17 and 18 may be cylindrical hollow ones or round rod-like solid ones.
[0011]
FIG. 6 is a plan view showing a modification of the first basic form, and FIG. 7 is a longitudinal sectional view thereof. As shown in the figure, in this modification, the distance between the two guide rails 26 and 27 and the guide rails 28 and 29 disposed on the fixed plate 25 installed on the support side is larger than the center portion. Two pairs of guide support edges 30 and 31 and guide support edges 32 and 33 each having an inner edge formed so as to be gradually reduced toward the end are provided, and these guide support edges 30 to 33 are provided on the guide support edges 30 to 33. On the other hand, the two pairs of tapered rolling portions 35 and 36 that are formed on the rolling elements 34 so as to taper outward are brought into contact with each other, and the tapered rolling portions 37 and 38 are brought into contact with each other via the rolling elements 34. The seismic isolation device having the return function is configured by supporting the supported body. That is, in this modification, two pairs of the first basic forms are arranged in parallel, but the number of installations of the basic forms can be increased as necessary. Further, as shown in FIG. 7 , the outer shape of the tapered rolling part is not only a linear outer shape such as a conical shape or a tapered shape, but also an outer shape having a convex or concave curved surface. Can also be adopted. Moreover, it is also possible to chamfer which consists of a plane or a rounded surface with respect to the guide support edge parts 30-33 of the guide rails 26-29. Further, as a third basic form, a rolling part that rolls in contact with each guide support edge of the guide rail has a circular cross section formed in a tapered shape in the vertical axis direction, and the vertical axis is centered. The form which comprised from the taper-shaped rolling part which rolls to (3) is also possible.
[0012]
【Example】
Next, an embodiment of the present invention in which the basic form is installed between the support side and the support side will be described. Figure 8 is a front view of an embodiment shown in cross-section a lower half of the present invention, and FIG. 9 is a A-A cross-sectional view. In the figure, 39 is a support side such as the ground, and 40 is a supported side such as a frame, and the seismic isolation device according to the present invention is installed between the support side 39 and the supported side 40. As shown in the figure, in this embodiment, two pairs of guide rails 42 and 43 and guide rails 44 and 45 installed on the fixing plate 41 are fixed to a predetermined position on the support side 39 via the fixing plate 41. . These guide rails 42 and 43 and the guide rails 44, 45 guide the two pairs of intervals are formed so as to be gradually smaller toward the both outer end portions from the central portion of the mutual respectively, as shown in FIG. 9 Support edge portions 46, 47 and guide support edge portions 48, 49 are provided, and 2 formed on the rolling element 50 with respect to the guide support edge portions 46-49, each having a tapered shape toward the outside. The pair of tapered rolling portions 51 and 52 and the tapered rolling portions 53 and 54 are configured to be provided with a return function by displacement in the height direction caused by rolling while abutting. Furthermore, in this embodiment, both end portions of the rolling element 50 are protruded to form shaft portions 55 and 56, and are formed in a rectangular frame shape via support members 57 and 58 that are rotatably connected to the shaft portions 55 and 56. The intermediate support frame 59 is supported with respect to the support side 39. Then, the top of the intermediate support frame 59, further wherein the rolling element 62 made of the same structure as the rolling element 50, as shown in FIG. 8 via a support member 60, 61 shown in FIG. 9 rolling The guide rail is supported by two pairs of tapered rolling portions formed on the rolling body 62, which are rotatably supported in a direction orthogonal to the moving body 50, and fixed to a predetermined position on the supported body side 40 via a fixed plate 63. It is comprised so that it may contact | abut to two pairs of each guide support edge part of the guide rail 64 which consists of the same structure installed in the direction orthogonal to 42-45.
[0013]
Thus, in this embodiment, the rolling elements 50 and the rolling elements 62 are installed in directions orthogonal to each other as described above, and the guide rails 42 to 45 and the supported object side 40 installed on the support side 39 in the directions orthogonal to each other. Since the support side 40 is supported with respect to the support side 39 by abutting each guide support edge of the guide rail 64 installed on the support side 39, the earthquake from which direction It is possible to respond freely to the action. Further, in this embodiment, since the intermediate support frame 59 having a rectangular frame shape is adopted, it is possible to set the entire height lower by further approaching as long as the rolling elements 50 and 62 do not interfere with each other. is there.
[0014]
Figure 1 0 is a front view of a main portion shown in cross-section of another embodiment of the present invention, FIG. 1 1 is a plan view of an essential portion shown by omitting the upper guide rail. For the upper and lower guide rails in this embodiment, since it is pre-configured in the same manner as you施例, the same components incorporated the description the same reference numerals. In this embodiment, as shown in the drawing, a roller support 86 having a shape orthogonal to a cross formed by welding or integrally formed is provided, and two pairs of inclined portions formed on the upper and lower portions of the roller support 86. Rotation support rollers 91 to 94 are rotatably installed on 87 and 88 and inclined portions 89 and 90, respectively, and these rotation support rollers 91 to 94 are guided support edge portions 70 and 71 of the lower guide rails 68 and 69, and A returning function is provided by abutting the guide support edge of the upper guide rail 85 from the outside and supporting the supported body side 66 with respect to the support body side 65.
[0015]
1 2 is a front view showing a main part of another embodiment of the present invention, FIG. 1 3 is a plan view thereof. This embodiment is a modification of the embodiment shown in FIG. 8, since it is adopted the configuration of the same way with respect to the upper and lower guide rails, the same components are denoted by the same reference numerals the description Is used. In the present embodiment, the cross-shaped member 95 formed in a cross shape as shown in FIG. 1 3, rotatably mounted on the shaft portion 96 to 99 which is formed at each end of the cross-shaped member 95 rolling elements with a 100 to 103, guide support of the guide rails 42 to 45 and tapered rolling portion 104-111 which are formed on both sides of the lower the rolling elements 100 to 103 thereof as shown in FIG. 1 2 It is comprised so that it may contact | abut to the edge part 46-49 and the guide support edge part 116-119 of the upper guide rail 112-115 from the inner side. Also in the present embodiment, the distances between the guide support edges 46 to 49 of the guide rails 42 to 45 and the guide support edges 116 to 119 of the guide rails 112 to 115 correspond to each other from the center portion to both outer end portions. Since it is formed so as to gradually become smaller, the return function is exhibited from the contact relationship with the tapered rolling portions 104 to 111. It should be noted that other shape members may be employed instead of the cross-shaped member 95.
[0016]
FIG. 14 is a front view showing a cross-section of the main part of another embodiment of the present invention, and FIG. 15 is a CC cross-sectional view thereof. In this embodiment, as shown in FIG. 14 , the bearing member 137 has two stages, the height is changed, and the rotation support shafts 138 and 139 are rotatably penetrated so as to be orthogonal to the cross shape. The rolling elements 140 to 143 were screwed onto the male screw portions formed at the respective end portions of 138 and 139 and fixed by lock nuts. And as shown in FIG. 15 , the taper-shaped rolling parts 144-147 formed in the outer surface of the rolling elements 140-143 are respectively provided with the guide support edge parts 150 and 151 of the lower guide rails 148 and 149, and the upper guide. The rails 152 and 153 are configured to come into contact with the guide support edge portions 154 and 155 from the inside. Even in this embodiment, the distance between the guide support edges 150 and 151 of the guide rails 148 and 149 and the distance between the guide support edges 154 and 155 of the upper guide rails 152 and 153 are different. Since it is formed so as to gradually become smaller from the central portion toward both outer end portions, a return function is exhibited from the contact relationship with the tapered rolling portions 144 to 147.
[0017]
FIG. 16 is a front view showing another embodiment of the present invention, and FIG. 17 is a plan view thereof. This embodiment shows an embodiment related to the third basic form, and abuts on each guide support edge portion of the guide rail, rolls around the vertical axis, and is tapered in the vertical axis direction. The case where the rolling element provided with the taper-shaped rolling part which consists of a circular cross section was shown is shown . In the present embodiment, as shown in the figure, two pairs of support shafts 180 to 183 installed vertically up and down with respect to the intermediate support 179 are formed to be tapered in the axial direction of the support shafts 180 to 183. Tapered rolling portions 184 to 187 each having a circular cross section are rotatably provided. In this case, the support shafts 180 to 183 are configured to be rotatable with respect to the intermediate support 179, and the tapered rolling portions 184 to 187 are fixed to the support shafts 180 to 183. May be. Also in this embodiment, the guide support edges 190 and 191 composed of the outer edges of the guide rails 188 and 189 and the guide support edges 194 and 195 composed of the outer edges of the guide rails 192 and 193 correspond to each other. Is formed so as to gradually increase from the central portion toward both outer end portions, so that the return function is achieved from the contact relationship with the tapered rolling portions 184 to 187 as rolling elements. Become. In the above embodiment, the tapered rolling portions 184 to 187 are guide support edges 190 and 191 made of the outer edges of the guide rails 188 and 189 or guide support edges made of the outer edges of the guide rails 192 and 193. Although the case where it is configured to abut against the outer side of 194, 195 has been described, a form in which the tapered rolling portion abuts against each guide support edge portion formed of the inner edge portion of the guide rail is also possible. It is.
[0018]
【The invention's effect】
According to the present invention, the following effects can be obtained.
(1) it is possible to support the gravity of the support side more stably by a combination of a tapered rolling portion and the rotation support low la or Ranaru rolling means and both sides of the guide support edges, as in the conventional flange The rolling means can be accurately guided along the guide rails by the guide support edge portions on both sides without applying any other anti-derailing means. That is, the guide support edge portions on both sides perform a more stable gravity support function on the supported body side and an accurate guide function for the rolling means.
(2) When a sudden earthquake action in a direction different from the guide direction by the guide support edge is applied, the contact position between the guide support edge and the rolling means is slightly displaced in the direction perpendicular to the guide direction. Then, it is possible to respond smoothly and freely by returning thereafter.
(3) If the form which rolls in contact with the respective guide support edge portions of the guide rail from the inside, particularly the tapered rolling portion formed so as to taper outward is adopted, paragraph 0009 As described above, since the track returning function of automatically returning to the original track guided by the guide support edge is provided, a more stable seismic isolation function can be obtained.
( 4 ) A seismic isolation device equipped with a return mechanism by a flat guide rail is possible.
( 5 ) The return characteristic can be freely set by the shape of the guide rail provided with the guide support edge.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing an operation principle of a first basic form of the present invention.
FIG. 2 is a schematic front view showing the operation principle of the first basic form.
FIG. 3 is a schematic perspective view showing a conventional form as a comparative example .
FIG. 4 is a schematic front view showing an operation principle of the comparative example .
FIG. 5 is a longitudinal sectional view showing a main part of another basic form.
FIG. 6 is a plan view showing a modification of the first basic form.
FIG. 7 is a longitudinal sectional view of the modification.
FIG. 8 is a front view showing a cross section of the lower half of an embodiment of the present invention.
9 is an A-A sectional view of the actual施例.
FIG. 10 is a front view showing a cross section of a main part of another embodiment of the present invention.
11 is a plan view showing the same real施例omitted upper guide rail.
FIG. 12 is a front view showing a main part of another embodiment of the present invention.
FIG. 13 is a plan view of the real施例.
FIG. 14 is a front view showing a cross-section of the main part of another embodiment of the present invention.
15 is a sectional view taken along line C-C of the actual施例.
FIG. 16 is a front view showing another embodiment of the present invention.
FIG. 17 is a plan view of the real施例.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 2 ... Guide rail, 3, 4 ... Guide support edge part, 5 ... Rolling body, 6, 7 ... Tapered rolling part, 8 ... Guide rail, 9, 10 ... Guide support edge part, 11 ... Rolling body, DESCRIPTION OF SYMBOLS 12, 13 ... Tapered rolling part, 14 ... Guide rail, 15, 16 ... Guide support edge, 17, 18 ... Rotation support roller, 19 ... Roller support part , 25 ... Fixed plate, 26-29 ... Guide rail , 30 to 33 ... guide support edge, 34 ... rolling element, 35 to 38 ... tapered rolling part, 39 ... support side, 40 ... supported side, 41 ... fixed plate, 42 to 45 ... guide rail, 46 to 49 ... Guide support edge, 50 ... Rolling element, 51-54 ... Tapered rolling part, 55,56 ... Shaft part, 57,58 ... Support member, 59 ... Intermediate support frame, 60,61 ... Support member, 62 ... rolling element, 63 ... fixing plate, 64 ... guide rail, 65 ... support side, 66 ... the support side, 6 8,69 ... Inner rail, 70, 71 ... guide supporting edge 7 5,76 ... auxiliary rail 8 4 ... fixing plate, 85 ... guide rail, 86 ... roller carrier, 87-90 ... inclined portion, 91 to 94 ... rotary support roller, 95 ... cross-shaped member, 96 to 99 ... shank, 100-103 ... rolling element, 104-111 ... tapered rolling portion, 112-115 ... guide rail, 116 to 119 ... guide support edge, 1 37 ... Bearing members, 138, 139 ... Rotating support shafts, 140-143 ... Rolling bodies, 144-147 ... Tapered rolling parts, 148, 149 ... Guide rails, 150, 151 ... Guide support edges, 152, 153 ... Guide rails, 154 and 155 ... guide support edge, 1 79 ... intermediate support, 180-183 ... support shaft, 184-187 ... tapered rolling portion, 188, 189 ... guide rail, 190, 191 ... guide support edge 192,1 3 ... guide rail, 194, 195 ... guide support edge

Claims (5)

  Guide rails having guide support edges formed so that the distance between inner edges spaced apart from each other gradually decreases from the center toward both outer ends, and the respective guides of the guide rails A taper-shaped rolling part having a circular cross section formed in a tapered shape toward an outer side that contacts and rolls against the support edge from the inside, and the taper-shaped rolling part extends along the guide support edge. A seismic isolation device configured to provide a return function by a displacement in a height direction generated in the tapered rolling part itself when rolling from the center part to the outer end part side.   Guide rails having guide support edges formed so that the distance between inner edges spaced apart from each other gradually decreases from the center toward both outer ends, and the respective guides of the guide rails A rotation support roller that is installed so as to be able to roll in contact with the support edge in an inclined state from the inside, and the rotation support roller extends from the center to the outer end along the guide support edge. A seismic isolation device configured to provide a return function by a displacement in a height direction generated in a roller support portion provided with the rotation support roller when rolling.   Guide rails having guide support edges formed so that the distance between outer edges spaced apart from each other gradually increases from the center toward both outer ends, and the respective guides of the guide rails A rotation support roller that is installed so as to be able to roll in contact with a state inclined from the outside with respect to the support edge, and the rotation support roller extends from the center to the outer end along the guide support edge. A seismic isolation device configured to provide a return function by a displacement in a height direction generated in a roller support portion provided with the rotation support roller when rolling.   Guide rails having guide support edges formed so that the distance between inner edges spaced apart from each other gradually decreases from the center toward both outer ends, and the respective guides of the guide rails A taper-shaped rolling part having a circular cross section that is configured to be able to roll around a vertical axis in contact with the support edge from the inside, and has a tapered cross section formed in a taper shape in the vertical axis direction. When the moving part rolls along the guide support edge from the center part to the outer end part side, it is configured to provide a return function by a displacement in the height direction generated in the tapered rolling part itself. A seismic isolation device.   Guide rails having guide support edges formed so that the distance between outer edges spaced apart from each other gradually increases from the center toward both outer ends, and the respective guides of the guide rails A taper-shaped rolling part having a circular cross section that is configured to be able to roll around a vertical axis while abutting from the outside with respect to the support edge, and having a circular cross section formed in a taper shape in the direction of the vertical axis. When the moving part rolls along the guide support edge from the center part to the outer end part side, it is configured to provide a return function by a displacement in the height direction generated in the tapered rolling part itself. A seismic isolation device.

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