WO2006129534A1

WO2006129534A1 - Xy guide device and base isolation device

Info

Publication number: WO2006129534A1
Application number: PCT/JP2006/310322
Authority: WO
Inventors: Toru Takahashi; Katsunori Yoshioka
Original assignee: Thk Co., Ltd.
Priority date: 2005-05-30
Filing date: 2006-05-24
Publication date: 2006-12-07
Also published as: TW200706775A; JPWO2006129534A1

Abstract

An XY guide device and a base isolation device. In the XY guide device, even if fixing bolts (71) are strongly tightened to connect a second slide member (13) to a first slide member (11), the deformed amount of a rubber shim (8) between the first slide member (11) and the second slide member (13) can be suppressed, and even if a load acts between these slide members (11) and (13), the tightening forces of the bolts (71) can be prevented from being reduced. The XY guide device comprises the first slide member (11) movable in an X-direction along a first track rail (10), the second slide member (13) movable in a Y-direction along a second track rail (12), the elastic body sheet (8) interposed between these first and second slide members (11) and (13), and the fixing means (71) connecting the second slide member (13) to the first slide member (11) so as to press down the elastic body sheet (8). A clearance absorbing member (9) with a spring constant smaller than that of the elastic body sheet (8) is interposed between the fixing means (71) and the second slide member (13).

Description

Specification

XY guidance device

Technical field

[0001] The present invention relates to an XY guide device capable of freely moving an object to be mounted in a X direction and a Y direction orthogonal to each other on a fixed base, and more specifically, a track rail and a movable object along the track rail. The present invention relates to an XY guide device configured by stacking two such linear guide devices using a linear guide device combined with a simple slide member.

Background art

[0002] Conventionally, this type of XY guide device has been widely used as a mechanism for moving a work table of a machine tool. However, in recent years, it has also been used as a seismic isolation device to reduce the shaking of a load. It is used. This seismic isolation device is used as a vibration countermeasure when transporting precision instruments and art showcases, or as an earthquake countermeasure for real estate such as buildings and houses. It is used for the purpose of insulating the vibration force of the ground and reducing the shaking of the load due to the vibration (Japanese Patent Laid-Open No. 8-240033 etc.)

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[0003] This seismic isolation device has a first fixed in such a manner that a rolling surface of a rolling element such as a ball is formed along the longitudinal direction and is orthogonal to each of the base and the structure. And a second track rail, a first slide member that is assembled to the first track rail via a number of rolling elements and that can freely reciprocate linearly along the first track rail, and the first slide. The second slide member is fixed to the member and is assembled to the second track rail through a number of rolling elements, and can freely linearly reciprocate along the second track rail. When the base shakes due to an earthquake or the like, each track rail and the slide member assembled to the track rail perform relative linear reciprocation. In other words, this seismic isolation device uses two linear guide devices that combine track rails and slide members, and these linear guide devices are arranged along the X and Y directions, respectively, and are connected to each other. The structure can be guided freely in the X and Y directions on the base. FIG. 7 shows an example in which a building is constructed on the base 100 via the above-mentioned base isolation device G. The base isolation device G is arranged at four power points between the structure 101 and the base 100. Has been. The first track rail of each seismic isolation device G is fixed to the base 100 along the X direction, while the second track rail is fixed to the structure 101 along the Y direction perpendicular to the first track rail. ing. Since the coefficient of dynamic friction between the track rail and the slide member is extremely small, when the base 100 swings in the horizontal direction due to an earthquake or the like, the slide member of each seismic isolation device moves on the track rail so as to absorb the swing. Move along the X or Y direction. That is, the structure 101 provided on the seismic isolation device G is insulated from the shaking of the base 100, and the soot is in a state of floating in the air. As a result, even if vibration energy due to an earthquake or the like propagates to the structure 101, the structure 101 can swing with its own vibration period regardless of the vibration period of the base 100. By setting the period sufficiently long, it is possible to avoid the resonance between the structure 101 and the substrate 100 and reduce the vibration of the strong structure 101.

[0005] In the seismic isolation device, the second slide member is fixed to the first slide member.

1S For example, in the case of a seismic isolation device as an earthquake countermeasure for buildings, the smoothness of the fixed surface of the first track rail in the base loo or the fixed surface of the second track rail in the structure 101 must be low. It is expected that the first track rail and the second track rail are fixed to the base 100 or the structure 101 in a slightly wavy state. Therefore, when the first slide member that moves along the first track rail and the second slide member that moves along the second track rail are firmly coupled without play, each slide member for each track rail Therefore, it is difficult to achieve the initial objective of absorbing and reducing the shaking of the structure 101.

[0006] For this reason, when two seismic isolation devices are configured by stacking two linear guide devices each composed of a track rail and a slide member, the first slide member and the second slide member coupled to each other With a rubber shim interposed between them, a fixing bolt is inserted through the first slide member and the second slide member with the rubber shim sandwiched between them, and the fixing bolt is tightened so that the rubber shim is slightly crushed. The first slide member and the second slide member were coupled. As a result, the smoothness of the mounting surface of the first track rail or the second track rail is somewhat poor. Even in this case, the rubber shim is elastically deformed to absorb a change in posture generated between the first slide member and the second slide member, so that each slide member can be moved easily with respect to each track rail. As possible.

Patent Document 1: JP-A-8-240033

Disclosure of the invention

Problems to be solved by the invention

[0007] However, when fixing the second slide member to the first slide member with a too large fastening force, the second slide member is interposed between the first slide member and the second slide member. There is a problem that the rubber shim is crushed greatly only by the fastening force of the fixing bolt, and the strong rubber shim cannot sufficiently absorb the change in the posture of the second slide member relative to the first slide member. End up.

[0008] On the other hand, when the fastening force of the fixing bolt is set to be weak, the elastic deformation of the rubber shim can be increased, so that the change in the posture of the second slide member relative to the first slide member is sufficiently absorbed. It becomes possible to do. However, after the seismic isolation device is assembled, a building that will be a structure is constructed on the seismic isolation device, and when a large load of the structure gradually acts on the seismic isolation device, this load causes Since the rubber shim interposed between the first slide member and the second slide member is crushed and the head of the fixing bolt is lifted up by the force of the second slide member, the fastening force of the fixing bolt is released. There was a problem such as. This is considered to induce problems such as a decrease in the shear strength of the fixing bolt, further loosening of the fixing bolt due to vertical vibration, and the occurrence of twisting of the second slide member relative to the first slide member.

Means for solving the problem

[0009] The present invention has been made in view of such problems, and an object of the present invention is to provide a fixing bolt when connecting the second slide member to the first slide member with the fixing bolt. Even if it is tightened to a certain extent, the deformation amount of the rubber shim between the first slide member and the second slide member can be kept small, and this is the case when the load of the structure acts on the seismic isolation device. However, an object of the present invention is to provide an XY guide device capable of preventing the fastening force of the bolt from being released. [0010] The XY guide device of the present invention includes a first track rail in which a rolling surface of a rolling element is formed along a longitudinal direction, and a rolling surface of the rolling element that is formed along a longitudinal direction. A second track rail arranged orthogonally to the first track rail, and assembled to the first track rail via a number of rolling elements, and freely reciprocating freely along the first track rail. A movable first slide member, fixed to the first slide member, and assembled to the second track rail via a number of rolling elements, and freely movable along the second track rail And a second slide member capable of linear reciprocation.

Accordingly, for example, when the first track rail is fixed to the base along the X direction, the first slide member freely moves in the X direction along the first track rail. The second slide member fixed to the first slide member also moves in the X direction. On the other hand, the second track rail perpendicular to the first track rail can be moved by the second slide member in the Υ direction, and this structure is fixed when the structure is fixed to the second track rail. The structure can move freely in the X and heel directions relative to the base.

[0012] Further, an elastic sheet is interposed between the first slide member and the second slide member, while the second slide member is fixed to the first slide member by a fixing means. It is combined. When the first slide member and the second slide member are coupled by the fixing means, the elastic sheet is slightly crushed between the first slide member and the second slide member, and the second slide The member is coupled to the first slide member while being biased in a direction away from the first slide member. As a result, even if the relative posture changes between the first slide member and the second slide member, the elastic sheet absorbs the elastic sheet by elastic deformation. The smoothness of the reciprocating motion of the first slide member relative to the rail and the reciprocating motion of the second slide member relative to the second track rail are not impaired.

[0013] However, when a load is applied to the second slide member in a direction in which the second slide member is pressed toward the first slide member, the elastic sheet is moved to the first slide member, the second slide member, and the like. May be further crushed between the two slide members, causing the fixing means to lift from the second slide member and cause play in the connection between the first slide member and the second slide member. There is. [0014] Therefore, in the XY guide device of the present invention, a gap absorbing member is provided between the fixing means and the second slide member, and the spring constant of the gap absorbing member is determined from the spring constant of the elastic sheet. Is set too small. As described above, when the gap absorbing member having a spring constant smaller than the spring constant of the elastic sheet is provided between the fixing means and the second slide member, the second slide member is moved to the first slide by the fixing means. Even if strongly coupled to the member, the gap absorbing member is crushed before the elastic sheet between the first slide member and the second slide member is crushed. The second slide member can be firmly fixed to the first slide member in a state where a sufficient amount of collapse of the elastic sheet is left. That is, since the elastic sheet can sufficiently absorb the change in the relative posture between the first slide member and the second slide member, the first slide member with respect to the first track rail The smoothness of the reciprocating movement of the second sliding member relative to the second track rail will not be impaired.

[0015] Also, even if a load of a structure such as a building acts on the second slide member and the elastic sheet is further crushed, the elastic sheet is crushed by the amount crushed. Since the gap absorbing member expands, the fixing means prevents the second slide member force from floating and prevents the play between the first slide member and the second slide member from occurring. Is possible.

[0016] The gap absorbing member may be any member such as a rubber sheet, a spring coil, or a spring washer as long as it has a smaller spring constant than the elastic sheet. However, when a large load is applied to the second slide member and the elastic sheet is crushed, in order to prevent the fixing means from lifting the second slide member force, the elastic body It is necessary for the gap absorbing member to be stretched as much as the sheet is crushed. From this point of view, it is preferable that the gap absorbing member has a large deformation with respect to the load.

Brief Description of Drawings

FIG. 1 is a perspective view showing an embodiment of a heel guide device of the present invention.

FIG. 2 is a perspective view showing a combination of a track rail and a slide member used in the heel guide device shown in FIG. 1. FIG. 3 is a front view showing a state in which the first slide member and the second slide member are coupled via a bracket.

FIG. 4a is a schematic diagram showing the positional relationship between the elastic sheet and the gap absorbing member when the fixing bolt is not fastened.

FIG. 4b is a schematic diagram showing deformation of the elastic sheet and the gap absorbing member in a state where the fixing bolt is fastened.

FIG. 4c is a schematic view showing a state of deformation of the elastic sheet and the gap absorbing member when a load F is applied to the second slide member.

FIG. 5a is a schematic diagram showing an example in which a disc spring washer is used as a gap absorbing member, and a state in which a fixed bolt is not fastened.

FIG. 5b shows an example in which a disc spring washer is used as a gap absorbing member, and is a schematic diagram showing a state of deformation of an elastic sheet and a gap absorbing member in a state where a fixing bolt is fastened.

FIG. 6a is a schematic diagram showing an example in which a posture following member is interposed between a gap absorbing member and a second slide member, and showing a state in which a fixing bolt is not fastened.

FIG. 6b is a schematic diagram showing a state in which a posture following member is interposed between the gap absorbing member and the second slide member, and the fixed bolt is fastened.

[Fig.7] Shows an example of constructing a structure on a base using an XY guide device as a seismic isolation device.

Explanation of symbols

[0018] 1 ... base, 2 ... structure, 8 ... elastic sheet, 9 ... gap absorbing member, 10 ... first track rail, 11 "'first slide member, 12 ... second track Rail, 13 ··· Second slide member, 71… Fixed Bonoret, 90 ··· Rubber sheet

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the wrinkle guide device of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an example of an embodiment of a heel guide device to which the present invention is applied. This gutter guide device G is provided, for example, between a base 1 that is the foundation of a building and a structure 2 such as a building, and supports it on the base 1 against the load of the striking structure 2 Used for The

[0021] The XY guide device G includes a first track rail 10 fixed to the base 1, a first slide member 11 assembled to the first track rail 10, and the first track rail 10. A second track rail 12 fixed to the structure 2 such as a building so as to intersect perpendicularly, and a second track rail 12 assembled to the second track rail 12 and fixed to the first slide member 11 And a slide member 13. Each track rail is formed with a plurality of ball rolling grooves along the longitudinal direction, and each of the slide members 11 and 13 has a large number of balls rolling in the ball rolling grooves. As the ball rolls, the slide members 11 and 13 can move freely on the track rails 10 and 12 with a very small dynamic friction resistance! The first slide member 11 and the second slide member 13 are exactly the same member, and are fixed back to back through a bracket. Since the first track rail 10 and the second track rail 12 are provided orthogonal to each other, the first slide member 11 moves along the first track rail 10 and the second slide member. When 13 moves along the second rail 12, the structure 2 moves two-dimensionally on the base 1.

FIG. 2 is a perspective view showing an example of a combination of a track rail and a slide member that can be used in the XY guide device of the present invention, that is, an example of a linear guide device. The linear guide device 3 engages with the track rail 4 through the track rail 4 in which the rolling surface 40 of the ball 30 is formed along the longitudinal direction, and a large number of balls 30 as rolling elements. Consists of a slide member 5 having an infinite circulation path for the ball 30 inside, and a seal member 6 that is attached to both front and rear end surfaces in the moving direction of the slide portion 5 and is in close contact with the upper surface and both side surfaces of the track rail 4. The slide member 5 is configured to reciprocate on the track rail 4 as the powerful ball 30 circulates.

[0023] As shown in this figure, the track rail 4 is formed in a substantially rectangular cross section, and mounting holes 41 for allowing the fixing bolts to pass therethrough are formed at appropriate intervals in the longitudinal direction. Has been. In addition, two ball rolling grooves 40 are formed on the upper surface of the track rail 4 so as to sandwich the mounting hole 41, and one ball rolling groove 40 is formed on each side surface. The four ball rolling grooves 40 are formed in a deep groove shape with a curvature slightly larger than the curvature of the spherical surface of the ball 30. On the other hand, the slide member 5 includes a block main body 51 provided with the mounting surface 50 of the bracket, and a pair of end plates 52 and 52 fixed to both front and rear end faces of the block main body 51. The upper surface of the track rail 4 is formed in a substantially saddle shape with a recess on the lower surface side. The block main body 51 is formed with four ball rolling grooves that face the ball rolling grooves 40 on the track rail 4 side. The ball 3 rolls while applying a load between the ball rolling groove of the block body and the ball rolling groove 40 of the track rail, so that the slide member 5 moves on the track rail 4. Become.

[0025] In addition, ball return holes corresponding to the respective ball rolling grooves are formed in the block body 51, and these ball return holes are formed in a substantially U-shaped direction change formed in the end plate 52. A ball (not shown) communicates with the ball rolling groove. That is, this direction change path picks up the ball 30 that has finished rolling in the ball rolling groove of the block body 51 and sends it to the ball return hole, while sending the ball 30 to the ball rolling groove. It is configured as follows. Therefore, when these end plates 52 are fixed to the block body 51 using the mounting bolts 53, an infinite circulation path for the balls 30 is formed on the slide member 5!

Furthermore, the end plate 52 is provided with an oil supply port for injecting lubricating oil into the endless circulation path, and a supply nip 54 is connected to the oil supply port via the end seal 6. It comes to be installed!

On the other hand, FIG. 3 shows a combined state of the first slide member 11 and the second slide member 13 in the XY guide device G. A rectangular metal bracket 7 is interposed between the first slide member 11 and the second slide member 13, and the fixing bolt 70 passing through the first slide member 11 and the second slide member. Fixing bolts 71 penetrating 13 are fastened to the bracket 7 respectively. Thereby, the first slide member 11 and the second slide member 13 are coupled to each other. Note that the second slide member 13 can be directly fastened to the first slide member 11 using the fixing bolt 71 without using the metal bracket 7.

However, when both the first slide member 11 and the second slide member 13 are directly fixed to the bracket 7 which is a metal block, the first slide member traveling on the first track rail 10 is used. 1 While 1 tries to change the posture following the first track rail 10, it is also restrained by the posture of the second slide member 13, so the mounting surface of the first track rail 10 on the base 1 is also the same. Or, if the smoothness of the mounting surface of the second track rail 12 in the structure 2 is low, there is an inconvenience that the smooth running of the slide members 11 and 13 with respect to the track rails 10 and 12 is hindered. Therefore, an elastic sheet 8 is interposed between the bracket 7 and the second slide member 13, and the first slide member 11 and the second slide member 13 are elastically deformed by the elastic sheet 8. It is configured to absorb the change in relative posture between and.

[0029] The elastic sheet 8 is made of rubber, and the second slide member 13 should prevent the local load from acting on the resilient elastic sheet 8 with two steel plates 80. , 80 between the bracket 7 and the second slide member 13. A fixing bolt 71 for fixing the second slide member 13 passes through the steel plate 80 and the elastic sheet 8 and is fastened to the bracket 7.

[0030] On the other hand, if the fixing bolt 71 is tightened too much with the elastic sheet 8 interposed between the bracket 7 and the second slide member 13, the resilient elastic sheet 8 is caused by the tightening force. After being crushed between the bracket 7 and the second slide member 13, the original purpose with the elastic sheet 8 interposed therebetween, that is, the first slide member 11 and the second slide member 13 There is a concern that the function of absorbing the relative change in posture may be impaired. On the other hand, if the fastening of the fixing bolt 71 is loosened, the amount by which the elastic sheet is crushed due to the fastening force of the strong fixing bolt is reduced. When the dead weight acts, the elastic sheet 8 is crushed by the raised dead weight, so that there is a disadvantage that the head of the fixing bolt also floats the second slide member. When the head of the fixing bolt 71 is also lifted by the second slide member, the tightening force of the fixing bolt 71 is completely released, the shear strength of the fixing bolt is reduced, and the fixing bolt is renewed due to vertical vibration. This causes problems such as loosening and twisting of the second slide member relative to the first slide member.

[0031] For this reason, a gap absorbing member 9 having an elastic body force is interposed between the second slide member 13 and the head of the fixing bolt 71. In the example shown in FIG. 3, the gap absorbing member 9 is obtained by sandwiching a rubber sheet 90 between two steel plates 91, 91, and fixing bolts 7 When 1 is fastened, the steel plates 91 and 91 crush the rubber sheet 90 and elastically deform it.

FIGS. 4a to 4c are schematic views simply showing the deformation of the elastic sheet 8 and the gap absorbing member 9 when the fixing bolt 71 is fastened. In these drawings, the elastic sheet 8 and the gap absorbing member 9 are depicted as springs. The spring constant of the rubber sheet 90 is set to be smaller than the spring constant of the elastic sheet 8. As shown in FIGS. 4a and 4b, the fixing bolt 71 is fastened and the second slide member 13 and the bracket 7 are tightened. Are combined such that the thickness of the gap absorbing member 9 is greatly reduced compared to the amount by which the thickness of the dielectric sheet 8 is reduced. For this reason, even after the second slide member 13 and the bracket 7 are joined, the elastic sheet 8 has sufficient room for elastic deformation, and the first slide member 11 and the second slide The original function of the elastic sheet 8 that absorbs a change in relative posture with the slide member 13 can be fully exhibited.

Further, as shown in FIG. 4c, after the second slide member 13 and the bracket 7 are coupled, a load F is applied from the structural body 2 to the powerful second slide member 13, Even if the elastic sheet 8 is elastically deformed and its thickness is reduced, the distance between the head of the fixing bolt 71 and the bracket 7 does not change at all, and the gap is the same as the thickness of the elastic sheet 8 is reduced. By restoring the thickness of the absorbing member 9, it is possible to prevent a trouble that the head of the fixing bolt 71 is completely lifted from the second slide member 13. For this reason, even if the structure 2 is constructed on the second slide member 13 of the XY guide device and the weight of the forceful structure 2 acts in the direction of pressing the second slide member 13 against the bracket 7, The fastening bolt 71 that joins the slide member 13 of 2 and the bracket 7 is not released from the fastening force.The shear strength of the fixing bolt 71 is reduced, and the fixing bolt 71 is further loosened due to vertical vibration. It is possible to prevent the occurrence of twisting of the second slide member 13 with respect to the first slide member 11 and the occurrence of the problems.

[0034] In consideration of the function of such a rubber sheet 90, that is, the gap absorbing member 9, if the amount of elastic deformation of the rubber sheet 90 when the fixing bolt 71 is fastened is too small, the elastic sheet 8 eventually becomes The thickness of the rubber sheet 90 is reduced with respect to the thickness of the elastic sheet 8 which is reduced by the action of the load F. If the increase is small, the head of the fixing bolt 71 will float from the second slide member 13. From this point of view, the elastic deformation amount for the predetermined load of the gap absorbing member 9 needs to be larger than that of the elastic sheet 8, and the elastically deformable stroke amount of the gap absorbing member 9 Is set to be larger than that of the elastic sheet 8.

FIGS. 5 a and 5 b show an example in which a disc spring washer 92 is used as the gap absorbing member 9. In the example of FIGS. 5a and 5b, two disc spring washers 92 face each other, and these are interposed between the head of the fixing bolt 71 and the second slide member 13. The spring constant of each disc spring washer 92 is set so that the total spring constant considering all the disc spring washers 92 is smaller than the spring constant of the elastic sheet 8. That is, the second slide member 13 is fixed to the bracket 7 with six fixing bolts 71, and two disc spring washers 92 are overlapped on each fixing bolt 71. Thus, a total of 12 disc spring washers 92 are interposed in series or in parallel. The total spring constant of these disc spring washers 92 is set to be smaller than the spring constant of the elastic sheet 8, and the disc spring washer 92 is fixed to the fixing bolt 71 and the second slide as shown in FIG. 5a. When the fixing bolt 71 is fastened to the bracket 7 in this state, the disc spring washer 92 is crushed more than the elastic sheet 8, as shown in FIG. It is possible to fasten the second slide member 13 and the bracket 7 while giving sufficient room for elastic deformation to the body sheet 8.

When a rubber sheet is used as the gap absorbing member 9, there is a buckling load on the rubber, and when the fixing bolt 71 is fastened with a force exceeding the buckling load, the rubber sheet 90 fastens the fixing bolt 71. It will not be possible to restore the previous shape. In that regard, when a metal disc spring washer 92 is used as the gap absorbing member 9, such inconvenience does not occur. Even if the fixing bolt 71 is tightened until the disc spring 92 is flattened, It is possible to cause the gap absorbing member 9 to exert the function as described above. In addition, by using a plurality of disc spring washers that are alternately stacked, it is possible to arbitrarily adjust the amount of the stowage of the gap absorbing member that can be deformed by inertia.

[0037] Then, in this way, the disc spring washer 92 is used as the gap absorbing member 9. However, when the weight of the structure 2 acts in the direction in which the second slide member 13 is pressed against the bracket 7, the fastening force of the fixing bolt 71 that couples the second slide member 13 and the bracket 7 is released. Such as lowering the shear strength of the fixing bolt, further loosening of the fixing bolt due to vertical vibration, and twisting of the second slide member relative to the first slide member. Can be prevented.

[0038] In the example shown in FIGS. 5a and 5b, the two disc spring washers 92 are used so as to face each other. A plurality of spring washers 92 may be used. Further, it is not always necessary to interpose a plurality of disc spring washers 92 with respect to one fixing bolt 71. It is also possible to interpose only one disc spring washer 92. In any case, the number and the stacking direction of the disc spring washers 92 can be arbitrarily determined according to the spring constant and the stroke amount required for the disc spring washer 92 as the gap absorbing member 9.

6A and 6B show an example in which a posture follower member 93 is interposed between the disc spring washer 92 as the gap absorbing member 9 and the second slide member 13. This posture following member 93 has a spherical surface protruding toward the second slide member 13, and when the fixing bolt 71 is tightened, as shown in FIG. The spherical slide 94 formed on the second slide member 13 is in sliding contact with no gap. The point that the disc spring washer 92 is crushed rather than the elastic sheet 8 when the fixing bolt 71 is fastened to the bracket 7 is the same as the example of FIG. It is possible to fasten the second slide member 13 and the bracket 7 while providing room for

[0040] Originally, the elastic sheet 8 is provided to absorb a change in the posture of the second slide member 13 that moves along the second track rail 12. Therefore, if a posture tracking member 93 having a convex spherical surface is interposed between the head of the fixing bolt 71 and the second slide member 13, the convex spherical surface 93 becomes the spherical seat of the second slide member 13. By making sliding contact with 94, the change of the second slide member 13 relative to the head of the fixing bolt 71 can be facilitated. As a result, the posture of the second slide member 13 fastened to the bracket 7 by the fixing bolt 71 can be easily changed, and the original function of the elastic sheet 8 can be effectively exhibited. It can be done. In particular, when the fixing bolt 71 is firmly tightened and the disc spring washer 92 as the gap absorbing member 9 is completely crushed, the posture change of the second slide member 13 is caused by the head of the fixing bolt 71. Therefore, the interposition of the posture tracking member 93 is more effective.

Claims

The scope of the claims

[1] A first track rail (10) in which a rolling surface of the rolling element is formed along the longitudinal direction, and a rolling surface of the rolling element is formed along the longitudinal direction and the first track rail. A second track rail (12) arranged orthogonally to (10), and the first track rail (10) assembled to the first track rail (10) via a number of rolling elements. A first slide member (11) capable of linearly reciprocating freely along the first slide member (11) and a second track rail that is fixed to the first slide member (11) and via a number of rolling elements. A second slide member (13) assembled to (12) and capable of linear reciprocation freely along the second track rail (12), and the first slide member (11) and the second slide member An elastic sheet (8) interposed between the second slide member (13) and the second slide member (13) so as to crush the elastic sheet (8). Is constituted from a fixing means for coupling (71) relative to the first slide member (11),

A gap absorbing member (9) having a spring constant smaller than the spring constant of the elastic sheet (8) is interposed between the fixing means (71) and the second slide member (13). XY guide that features that.

[2] The fixing means is a plurality of fixing bolts (71) that pass through the second slide member (13) and are fastened to the first slide member (11). The gap absorbing member (9) A disc spring washer (92) interposed between the head of the fixing bolt (71) and the second slide member (13), and the total spring constant considering all disc spring washer (92) The XY guide according to claim 1, wherein is smaller than a spring constant of the elastic sheet (8).

[3] A posture tracking member (93) having a convex spherical surface is interposed between the gap absorbing member (9) and the second slide member (13). The seismic isolation device according to claim 1, wherein the seismic isolation device is in sliding contact with a spherical seat (94) provided on the sliding member (13).

[4] Seismic isolation device placed between the base (1) and the structure (2) installed on this base (1) to suppress the transmission of vibrations from the base (1) to the structure (2) Because

A rolling surface of the rolling element is formed along the longitudinal direction, a first track rail (10) fixed to the base (1), and a rolling surface of the rolling element is formed along the longitudinal direction. The second track rail (12) fixed to the structure (2) orthogonal to the first track rail (10) and the first track rail (10 ) And the first A first slide member (11) capable of linearly reciprocating freely along the track rail (10), and fixed to the first slide member (11) and via a number of rolling elements. A second slide member (13) assembled to the second track rail (12) and capable of linear reciprocating freely along the second track rail (12), and the first slide members ( 11) and an elastic sheet (8) interposed between the second slide member (13) and the second slide member (13) so as to crush the elastic sheet (8). A fixing means (71) coupled to the first slide member (11),

A gap absorbing member (9) having a spring constant smaller than the spring constant of the elastic sheet (8) is interposed between the fixing means (71) and the second slide member (13). A seismic isolation device characterized by that.

[5] The fixing means is a plurality of fixing bolts (71) that pass through the second slide member (13) and are fastened to the first slide member (11). The gap absorbing member (9) A disc spring washer (72) interposed between the head of the fixing bolt (71) and the second slide member (13), taking into account all disc spring washer (72) The seismic isolation device according to claim 4, wherein is less than a spring constant of the elastic sheet (8).

[6] A posture tracking member (73) having a convex spherical surface is interposed between the gap absorbing member (9) and the second slide member (13). The seismic isolation device according to claim 4, wherein the seismic isolation device is in sliding contact with a spherical seat (74) provided on the sliding member (13).