JP2000283215A - Base isolation structure and base isolation auxiliary device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control relative movement of a base and a body to be held when relative movement force is not more than a prescribed value, and to perform base isolating function when the relative movement force is not less than the prescribed value. SOLUTION: In this device, a base isolation auxiliary device body 1a arranged on either one of a base 3 or a body to be held 4 is provided with an engaging means engaging with and disengaging from a means to be engaged oppositely provided on the other side of the supporting device body, wherein the engaging means presses the means to be engaged with prescribed pressure when engaging. When the magnitud of swing exceeds a prescribed value, the engaging means instantly retracts from the means to be engaged, and when the magnitud of the swing become not more than the prescribed value, the engaging means goes ahead with spending a prescribed time to engages with the means to be engaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a method in which not only a precision machine which is vulnerable to vibrations such as a computer but also a plate material (floor material) attached to a general building which is heavy is mounted on a foundation side such as the ground. A seismic isolation structure and a seismic isolation assist device that can hold an object such as a building immovable until a predetermined force acts in the relative movement direction when moving relative to an arbitrary horizontal direction. About.

[0002]

2. Description of the Related Art Conventionally, a building is sometimes supported via a seismic isolation device so as to be able to move relatively to the ground as a foundation. It is difficult to reach.

As shown in FIG. 6, for example, such a seismic isolation device includes an outer housing 21 fixed to the lower surface of a plate member 20 attached to a building, and an outer housing 21 located in the outer housing 21 and having an outer housing 21.
And a disk-shaped support member 22 whose lower surface is a flat support surface, and a number of members circulatingly accommodated in a space 23 formed between the outer casing 21 and the support member 22. And the lower small ball 24 is capable of rolling on the base surface 25.

According to the seismic isolation device having the above structure, when an earthquake or the like occurs, the small sphere 24 rolls on the base surface 25 and the space 23
Due to the circulation in the inside, the relative movement of the base surface 25 and the plate material 20 in an arbitrary direction becomes possible, and the movement of the base surface 25 is hardly transmitted to the plate material 20.

Further, when the seismic isolation device having the above configuration is used in an actual building, the seismic isolation device operates due to deflection, and the building moves in an arbitrary horizontal direction with respect to a foundation side such as the ground. For example, an elastic spring (not shown) may be attached directly to the seismic isolation device or to the plate 20 or the like so that the building can be easily restored to the original position even in the case of a slight relative movement. A plurality is provided radially.

[0006]

However, in the above-mentioned conventional vibration isolating device, it is possible to buffer vibrations caused by an earthquake or the like. However, even when a building receives a gust, for example, the building vibrates. There was a problem that would.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems.
That is, when the magnitude of the shake is equal to or less than a predetermined value, the relative movement between the foundation and the held body is restricted, and when the magnitude of the shake is equal to or more than a predetermined relative moving force, that is, when the magnitude of the shake is equal to or more than a predetermined value, The task is to ensure that the seismic isolation function can be fully demonstrated.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. First, the feature of the seismic isolation structure is that the held member 4 is moved relative to the foundation 3 in the lateral direction. Used together with the seismic isolation device 2 that is provided with a restoring means for directly or indirectly holding restoring means for movably holding and restoring the held body 4 relatively moved in the lateral direction to its original position. And a seismic isolation auxiliary device main body 1a provided on one of the base 3 and the held body 4, and the seismic isolation auxiliary device main body 1a has the other to face the seismic isolation auxiliary device main body 1a. A disengageable engaging means is provided on the engaged means provided on the side, and at the time of engagement via both, the engaging means presses the engaged means with a predetermined pressure, and Is larger than a predetermined value, the engaging means instantaneously retreats from the engaged means, and the magnitude of the deflection is large. Saga when it becomes less than a predetermined value, in the configuration to advance over a predetermined time to engage the engaged means.

Therefore, the engaging means provided on the seismic isolation assisting apparatus main body 1a locks the engaged means provided on either the base 3 or the held body 4 while pressing it with a predetermined pressure. Accordingly, the held body 4 is prevented from moving with respect to the foundation 3.

Next, when a relative movement force greater than a predetermined value, that is, a swing greater than a predetermined value acts on one of the held member 4 and the base 3, the engaging means is moved from the engaged means by the engaging means. Since the evacuation is instantaneous, the held body 4 is disengaged from the engaging means, and the movement of the held body 4 is allowed.

Further, when the magnitude of the deflection becomes equal to or smaller than a predetermined value, the held body 4 is restored to the original relative position via the restoring means. The engaging means is advanced over a predetermined time to engage with the engaging means, the engaging means is engaged to press the engaging means with a predetermined pressure, and the engaging means is locked again.

The feature of the seismic isolation auxiliary device is that
Alternatively, the seismic isolation assisting device main body 1a provided on one of the held members 4 is provided with an engaging means which can be disengaged from the engaged means provided on the other side so as to face the assisting device main body 1a. And when the engaging means presses the engaged means with a predetermined pressure during engagement via both, and when the magnitude of the deflection of the engaging means exceeds a predetermined value, When the retreat is instantaneously performed from the combining means and the magnitude of the run-out becomes equal to or less than a predetermined value, it advances for a predetermined time to engage with the engaged means, so that the base 3 or the held body 4 It is possible to prevent the movement of the held body 4 with respect to the base 3 by locking the engaged means provided on one of them while pressing it with a predetermined pressure by the engaging means of the auxiliary device main body 1a. There are advantages that can be done.

Next, when a relative movement force greater than a predetermined value, that is, a runout greater than a predetermined value acts on one of the held member 4 and the base 3, the engaging means is moved by the engaged means. Since the held body 4 is instantaneously retracted, the held body 4 is disengaged from the engagement means and the movement of the held body 4 is allowed. Means that the held body 4 is restored to the original relative position via the restoring means, but at this time, the engaging means also takes a predetermined time to engage with the engaged means and advances. There is an advantage that the engaged means is engaged so as to be pressed with a predetermined pressure, and the engaged means can be locked again.

Further, when each of the engaging means and the engaged means of the seismic isolation assisting device has the planar portions 5a and 6a which can be in close contact with each other, the frictional value at the time of engagement is increased. There is an advantage that a more reliable engagement state can be maintained.

Further, since each of the planar portions 5a and 6a is subjected to a concavo-convex processing for increasing the frictional resistance during engagement, the engaging means presses the engaged means with a predetermined pressure. In this case, it is possible to maintain the engagement state more securely by increasing the friction value when locking while holding the holding member 4 until the magnitude of the deflection becomes equal to or more than the predetermined value. This has the advantage that the holding of the held body 4 can be firmly and reliably maintained after the engaging means advances to and engages with the engaged means when the magnitude of the holding or the runout becomes equal to or less than a predetermined value. Have.

Further, the engaging means is provided so as to be able to move back and forth with respect to the engaged means in accordance with the increase or decrease of the liquid filled in the seismic isolation assisting apparatus main body 1a, and the liquid is swingable via the fulcrum. In addition, since it is configured to decrease when the swing of the pendulum body swings when the magnitude of the shake exceeds a predetermined value, and to increase when the swing of the pendulum body stops, the ground, etc. In the case of horizontal swing, not only can the held object be moved relative to the ground side such as the ground in any horizontal direction, but also the held object can be held until the swing becomes a predetermined value or more. There is an advantage that a seismic isolation assist device that can hold a body immovably can be provided extremely simply and at low cost.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 and 2, reference numeral 1 denotes a seismic isolation assist device constituting one of the seismic isolation structures of the present invention, and reference numeral 2 denotes a conventionally known seismic isolation device constituting the other of the seismic isolation structure. Is shown.

Before describing the seismic isolation assisting device 1 according to the present invention, a conventionally known seismic isolation device 2 will be described. In FIG. 2, a plurality of seismic isolation devices 2 are arranged at predetermined locations on a foundation 3 provided on the ground or the like to support a held object 4 such as a building, and, for example, the ground is moved horizontally ( When vibrating in the lateral direction), the relative movement between the held body 4 and the base 3 is allowed so that the vibration is not transmitted to the held body 4, and an elastic body such as rubber is processed into a cylindrical shape. What was used is used.

The seismic isolation device 2 does not need to use an elastic body made of rubber or the like processed into a columnar shape as described above. For example, the seismic isolation device 2 is provided between the foundation 3 and a held body 4 such as a building. A structure in which a plurality of spheres are interposed (not shown) can be adopted, and the seismic isolation device 2 restores the base 3 and the held body 4 to their original positions when the base 3 and the held body 4 move relative to each other. Restoring means is provided directly or indirectly.For example, as such a restoring means, by contacting a sphere with a spherical concave receiving member, a steel ball is placed at the center of the receiving member by the weight of the building. Rolling devices and devices utilizing the elastic force of springs are known (not shown).

Next, the seismic isolation assisting device 1 according to the present invention will be described. The seismic isolation assisting device 1 is a cylindrical seismic isolation assisting device fixed via bolts to a foundation 3 disposed on the ground or the like. The apparatus main body 1a and a disk body (engaged means) 6 provided on the upper surface of the seismic isolation auxiliary apparatus main body 1a so as to be able to move back and forth and provided on the lower surface of a held body 4 such as a building. And an engageable piston body (engaging means) 5.

The piston body 5 and the disk body 6 are provided with opposed planar portions 5a and 6a which can be brought into close contact with each other, and the planar portions 5a and 6a are engaged with each other via both. In order to increase the frictional resistance at the time, irregularities are formed through a plurality of pyramid-shaped protrusions of the same size arranged regularly in a grid pattern at the same pitch.

Reference numeral 7 denotes a liquid pumping device for feeding water (liquid) 8 with a constant pressure into the seismic isolation auxiliary device main body 1a through the introduction pipe 17, and the liquid pumping device 7 has a liquid pumping device. A pressing body 9 is provided for constantly pressing a predetermined amount of water 8 stored in the storage section 7a via a spring 10 having a preset spring rate.

Reference numeral 11 denotes a filling chamber into which the water 8 pumped through the liquid pumping device 7 is filled. Above the filling chamber 11, the piston body 5 is mounted on a flange 5b formed at the lower part. The piston 5 is provided with a seal ring 13 so as to be movable up and down, and the flange 5b of the piston 5 is always urged downward by a spring 12 having a preset spring rate.

The piston body 5 is moved from the upper surface of the seismic isolation assist device main body 1a by setting and adjusting the amount of water 8 to be filled by being pumped into the filling chamber 11 through the pumping device 7 and the spring rate of the spring 12. The projection length can be arbitrarily set and changed. Therefore, the piston body 5 according to the present embodiment is provided with the disk body (covered) provided on the supported body 4 when the seismic isolation device 2 supports the supported body 4 such as a building (in normal use). The engaging length is set in advance so as to be engageable with the engaging means 6.

Further, a through hole 14a penetrating through the lower wall portion 14 is provided at the center of the lower wall portion 14 of the filling chamber 11, and the lower wall portion 14 provided with the through hole 14a is not filled. The opening 14b on the side of the chamber 11 is located at a predetermined position in the lower wall
It is formed to have a smaller diameter than the opening 14d on the side of the filling chamber 11 via a tapered peripheral portion 14c tapered toward the side b.

The lower wall 14 is provided with the introduction pipe 17.
Is filled with a constant pressure from the liquid pumping device 7 to the filling chamber 11 in the seismic isolation assist device main body 1a.
The guide hole 18 is formed, and the guide hole 18 is set to a predetermined length and an inner diameter with respect to the water 8 to which a certain pressure is applied via the liquid pumping device 7 to thereby fill the filling chamber. There is a function to adjust the amount of water 8 to be filled in 11.

Accordingly, the time required for the piston body 5 projecting through the length and the inner diameter of the guide hole 18 to engage with the disk body 6 provided on the held body 4 can be appropriately changed. As a result, the piston body 5 is advanced over a suitable time in consideration of the capacity, the number of installations, etc. of the seismic isolation device 2 used in correspondence with the various types of held members 4, and a smoother disk ( There is an advantage that engagement between the engagement means 6 and the piston body (engaging means) 5 can be promoted.

In the through hole 14a, a steel ball 15 having an outer diameter capable of projecting a part 15a of the spherical surface from the opening 14b on the side opposite to the filling chamber 11 is provided with a tapered peripheral portion in the through hole 14a. Introduced to be supported by 14c.

Reference numeral 16 denotes a partition plate 1b for dividing a space portion 19 formed below the lower wall portion 14 into upper and lower partitions.
In addition, a swingable pendulum body is shown with a spherical locking portion 16a locked in a downward tapered hole 1c provided at a position facing the opening portion 14b as a fulcrum, and a lower end portion of the pendulum body 16 is A weight 16b is attached, and at the upper end, a portion 15a of the spherical surface of the steel ball 15 protruding from the opening 14b on the side opposite to the filling chamber 11, i.e., an inverted conical shape contacting the peripheral surface of the steel ball 15. A steel ball receiving portion 16e having a disk shape in a plan view and having a concave portion 16d having a tapered peripheral surface 16c at the center thereof is provided.

Since the space 19 is divided into an upper space 19a and a lower space 19b by the partition plate 1b,
A steel ball receiver 16e is located in the upper space 19a, and a weight 16b is located in the lower space 19b.

The seismic isolation structure and the seismic isolation auxiliary device used in the seismic isolation structure according to one embodiment of the present invention have the above-described configuration. Next, the operation of the seismic isolation structure will be described.

First, in a normal state, the seismic isolation device 2 holds the held body 4 such as a building at a predetermined height position with respect to the foundation 3, and at the same time, the piston body (engaging means) of the seismic isolation auxiliary device 1 5) Locks the disk body (engaged means) 6 provided on the lower surface of the held body 4 such as a building while pressing the disk body 6 with a predetermined pressure. Is kept blocked.

That is, when the piston body 5 and the disk body 6 are engaged with each other, the relative movement between the held body 4 such as a building and the foundation 3 is restricted. Even when the held body 4 such as a building receives wind, the seismic isolation assist device 1 can prevent the held body 4 such as a building from being swung horizontally or moved. There are advantages that can be done.

Next, in the above state, as shown in FIG. 3, for example, when the foundation 3 sways horizontally with a predetermined amplitude due to the occurrence of an earthquake or the like, the foundation 3 is fixed to the foundation 3 via bolts. The seismic isolation assist device 1 also reciprocates (arrow A) in the horizontal direction.

In the initial stage of the vibration, the seismic isolation device 2 is used.
The seismic isolation assist device 1 also slightly moves relative to the ground in the amplitude direction, but at this time, the amplitude of the vibration, that is, the magnitude of the vibration, is bored in the partition plate 1b. The pendulum body 16 having the spherical locking portion 16a supported by the downward tapered tapered hole 1c is large enough to swing the pendulum body 16, more specifically, a portion 15a is formed in the recess 16d of the steel ball receiving portion 16e of the pendulum body 16.
Of the pendulum 16
When the weight becomes greater than the value at which the weight 16b can be swung (arrow B) so as to oscillate, the opening on the side opposite to the filling chamber 11 provided in the through hole 14a of the lower wall portion 14 is provided. The water 8 filled in the filling chamber 11 from the part 14b instantaneously flows into the upper space part 19a between the lower wall part 14 and the partition plate 1b (arrow C).

As a result, the surface of the water 8 in the filling chamber 11 drops rapidly, so that the pressure for pressing the piston body 5 upward disappears instantaneously, and the spring for pressing the flange 5b downward.
The piston body 5 moves downward so as to retreat (arrow D) from the disk body 6 of the held body 4 instantaneously in synchronization with the lowering of the water 8 surface via the 12.

Accordingly, a plurality of held bodies 4 such as a building disengaged by the piston body 5 are arranged at predetermined positions of the foundation 3 disposed on the ground or the like, and are held. 4
Even if the ground vibrates in the horizontal direction via the seismic isolation device 2 that supports the object, the operation is performed to allow the relative movement between the held body 4 and the foundation 3 so that the vibration is not transmitted to the held body 4. (Not shown).

Thereafter, as shown in FIG. 4, the amplitude of the swing, that is, the magnitude of the shake is small enough to swing the pendulum body 16, more specifically, the steel ball of the pendulum body 16. Steel ball 15 formed by contacting part 15a with recess 16d of receiving part 16e
To lift the pendulum body 16 upward.
If the value of 16b becomes less than the value that causes the swing, the pendulum 16 will inevitably stop swinging.

Accordingly, the steel ball 15, which has no interference with the steel ball receiving portion 16 e of the pendulum body 16, passes through the through hole 14 a of the lower wall portion 14.
Along the tapered peripheral portion 14c provided on the pendulum body 16 by its own weight to move the opening 14b into a part 15 of its own spherical surface.
At the same time as closing with a, a part 15a comes into contact with the concave portion 16d of the steel ball receiving portion 16e of the pendulum body 16 and fits.

Accordingly, a steel ball fitted into the recess 16d of the steel ball receiving portion 16e of the pendulum body 16 by contacting a part 15a of the spherical surface.
Due to 15, the pendulum 16 stops completely swinging.

Since the water 8 with a constant pressure is always fed into the filling chamber 11 through the liquid pumping device 7 through the introduction pipe 17, the steel ball 15 is inserted into the opening 14b. When the water 8 is filled with the guide hole 18 of the lower wall portion 14 into the filling chamber 11 over a predetermined period of time at substantially the same time as the portion 15a of the spherical surface is closed, the piston body 5 is brought into contact with the water 8 surface. It is possible to advance (arrow F) toward the disk 6 of the held object 4 to the initially set protruding length for a predetermined time while being synchronized with the rise of the arrow.

Accordingly, the piston body 5 which has advanced toward the disk body 6 (arrow F) is in the same state as when the seismic isolation device 2 supports the held body 4 such as a building (in normal use). The disk body 6 is engaged.

Therefore, if the seismic isolation structure using the seismic isolation device and the seismic isolation auxiliary device having the above-described configuration is used, when the magnitude of the horizontal deflection caused by an earthquake or the like is equal to or smaller than a predetermined value, the foundation and the held object are not affected. This has a great advantage that the seismic isolation function can be sufficiently exhibited when the magnitude of the vibration is restricted to a predetermined value or more.

Further, when each of the engaging means (piston body) and the engaged means (disc body) of the seismic isolation assisting device has planar portions 5a and 6a which can be in close contact with each other, There is an advantage that the friction value at the time of engagement can be increased to maintain a more reliable engagement state.

Further, each of the planar portions 5a and 6a has a pyramid shape of the same size and shape which is regularly arranged in a grid pattern at the same pitch so as to increase the frictional resistance at the time of engagement through both. Since the concave-convex processing is performed through the convex portion, the friction value when the engaging means is locked while pressing the engaged means with a predetermined pressure is maximized to more securely engage the state. Therefore, the holding means 4 holds the held member 4 until the magnitude of the deflection becomes equal to or more than the predetermined value, and the magnitude of the deflection becomes equal to or less than the predetermined value. There is an advantage that the holding of the held body 4 after it is advanced and engaged with the means can be firmly and reliably maintained.

In the above embodiment, the planar portions 5a, 6a
Each of them is provided with a concave and convex process through a pyramid-shaped convex portion for increasing frictional resistance at the time of engagement through both, but is not necessarily limited to the pyramid-shaped convex portion. As long as irregularities are provided on each of the planar portions 5a and 6a to increase the frictional resistance at the time of engagement, the specific shape of the irregularities, the engagement state, the number of arrangements, etc. are not limited at all. Needless to say.

Further, as shown in FIG. 5, the engaging means itself which reciprocates in the horizontal direction is a planar part of the engaged means such as a building.
In the concave portion of 6a, at least the entire distal end may be formed in a size that can be fitted with a predetermined dimension. In this case, the peripheral edge of the distal end of the planar portion 5a of the engagement means and the An oblique cut portion for allowing the two fittings to be guided more smoothly on the periphery of the opening of the concave portion of the planar portion 6a of the means.
5c and 6b may be provided respectively.

Further, in the above embodiment, the engaging means is provided so as to be able to move back and forth with respect to the engaged means as the water (liquid) 8 filled in the seismic isolation assist device main body 1a increases and decreases. Is swingable via the fulcrum, and decreases when the swing of the pendulum body 16 swings when the magnitude of the swing exceeds a predetermined value, and increases when the swing of the pendulum body 16 stops. In particular, when the ground or the like shakes in the horizontal direction, not only can the held object 4 be moved relative to the foundation 3 side such as the ground in any horizontal direction, but also There is an advantage that the seismic isolation assisting device 1 that can hold the held object 4 immovably until the size becomes equal to or more than a predetermined value can be provided extremely simply and at low cost.

In the above embodiment, the seismic isolation assisting device 1 provided with the engaging means is provided on the foundation 3, and the means to be engaged with the engaging means is a holding member 4 such as a building. However, the present invention is not necessarily limited to this, and the seismic isolation assisting device 1 having the engaging means is provided on the held body 4 such as a building, and the engaged means is not provided. It may be provided on the foundation 3.

Further, in the above embodiment, water was used as the liquid, but oil may be used. In other words, the type of liquid is not limited as long as it is liquid. Water is most preferable in consideration of the properties and safety such as fire, but any liquid can of course be used.

Further, in the above-described embodiment, the case where the pendulum body 16 is used for the seismic isolation assisting device main body 1a has been described, but the point is that the seismic isolation assisting device provided on either the foundation 3 or the held member 4 is important. The main body 1a is provided with an engaging means which can be disengaged from an engaged means provided on the other side so as to face the auxiliary device main body 1a, and when the engaging means is engaged via both, The engaged means is pressed by pressure, and when the magnitude of the deflection of the engaging means is equal to or more than a predetermined value, the engaging means is immediately retracted from the engaged means and the magnitude of the deflection is equal to or less than a predetermined value. In such a case, it is not always necessary to use the pendulum 16 if it is configured to advance over a predetermined time to engage with the engaged means, but the manufacturing cost, maintenance and maintenance, durability, etc. Considering this, it is preferable to use the pendulum body 16.

Further, in the above embodiment, the water 8 instantaneously comes into contact with the lower wall portion 14 and the partition plate from the opening 14 b on the side opposite to the filling chamber 11.
Although the case of instantaneously flowing into the upper space 19a between the upper space 1b and the upper space 1b has been described, a structure in which only a predetermined amount of water 8 is stored in the upper space 19a may be used. The structure may be such that the water 8 flowing into the section 19a is drained by a human operation or automatically discharged by using an automatic liquid discharging device (not shown) or the like. After the water 8 which has instantaneously flowed into the upper space portion 19a is taken out by using
A liquid replenishing device (not shown) for forcibly replenishing the liquid storing portion 7a may be used, and thus, when the water 8 is circulated, there is an advantage that the running cost of the device can be reduced.

[0053]

As described above, the present invention relates to the seismic isolation assist device main body, which is provided on the other side of the seismic isolation assist device main body so as to be opposed to the base or the engaged means of the held object. A detachable engaging means is provided, and when engaging via both, the engaging means presses the engaged means with a predetermined pressure, and when the magnitude of the deflection exceeds a predetermined value. When the engaging means is retracted instantaneously from the engaged means and the magnitude of the run-out becomes equal to or less than a predetermined value, it is necessary to take a predetermined time to engage with the engaged means. Therefore, it is possible to hold the base or the held body provided with the engaged means until the predetermined relative movement force acts on the base of the seismic isolation assist device provided with the engaging means.

Therefore, for example, when the object to be held is a building, even if wind acts on the building, the building does not inadvertently vibrate, and the vibration poses a structural problem to the building. In the event of an intense earthquake of a predetermined value or more, the seismic isolation function can be used positively.

Further, when the magnitude of the vibration due to the earthquake falls below a predetermined value which does not cause a structural problem with respect to the building or when the vibration stops, the seismic isolation auxiliary device body which has been evacuated. The engaging means protrudes over a predetermined period of time and smoothly engages with the engaged means, so that not only can the seismic isolation assist device function again on the building, There is an effect that it is possible to provide a seismic isolation assist device that does not generate abnormal noise or impact at the time.

Further, when each of the engaging means and the engaged means of the seismic isolation assisting device has a planar portion which can be in close contact with each other, the frictional value at the time of engagement is raised to further ensure the reliability. The engagement state can be maintained, so that the life of the seismic isolation assist device can be extended while preventing the damage and failure of the seismic isolation assist device main body including the engagement means.

Further, the engaging means is provided so as to be able to move back and forth with respect to the engaged means as the liquid increases and decreases, and the liquid can swing through a fulcrum and the magnitude of the swing is predetermined. The value decreases when the pendulum body swings when the value exceeds the value, and increases when the pendulum body stops swinging. In addition to being able to relatively move the object to be held in any horizontal direction with respect to the foundation side, etc., the object to be held is immovably held until the magnitude of the runout exceeds a predetermined value. There is also an effect that a seismic isolation assist device that can be provided can be provided extremely easily and at low cost.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an actual use of a seismic isolation assisting device according to an embodiment of the present invention. (A) is a partial sectional structural view, (B) is a plan view of a piston body, and (C) is a plane of a disk body. FIG.

FIG. 2 is an explanatory view of a use state showing one embodiment of a seismic isolation structure using the seismic isolation auxiliary device of the present invention.

FIG. 3 is a partial cross-sectional structural view showing an operation state of the seismic isolation auxiliary device of the present invention.

FIG. 4 is a partial cross-sectional structural view showing a return state of the seismic isolation assist device of the present invention.

FIG. 5 is a partial sectional structural view showing another embodiment of the seismic isolation assisting device of the present invention.

FIG. 6 is a sectional front view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Seismic isolation auxiliary device 1a ... Seismic isolation auxiliary device main body 3 ... Foundation 4 ... Building (held object) 5 ... Piston body (engaging means) 6 ... Disc body (engaged means) 7 ... Liquid pumping device

Claims (5)

[Claims] An object of the present invention is to hold a held body (4) relatively movably in a lateral direction with respect to a foundation (3) and to restore the held body (4) relatively moved in a lateral direction to an original position. A seismic isolation device (2) provided directly or indirectly with a restoring means, and used together with the seismic isolation device (2) and provided on either the foundation (3) or the held body (4). With the seismic isolation auxiliary device main body (1a),
In addition, the seismic isolation auxiliary device main body (1a) includes
The engaging means provided on the other side provided opposite to a) is provided with a detachable engaging means, and when engaging via both, the engaging means moves the engaged means at a predetermined pressure. When the pressure is applied and the magnitude of the run-out is equal to or greater than a predetermined value, the engaging means is immediately retracted from the engaged means, and when the magnitude of the shake is equal to or less than the predetermined value, A seismic isolation structure characterized in that it is configured to advance for a predetermined time to engage with the means. 2. A base used together with a seismic isolation device (2).
(3) The seismic isolation auxiliary device main body (1a) provided on either one of the held object (4) is provided with an engaging means provided on the other side to face the auxiliary device main body (1a). The engaging means presses the engaged means with a predetermined pressure when the engaging means is engaged through the both, and the magnitude of the deflection of the engaging means is reduced. A configuration in which, when the magnitude becomes equal to or more than a predetermined value, the evacuation is performed instantaneously from the engaged means, and when the magnitude of the deflection becomes equal to or less than the predetermined value, the apparatus takes a predetermined time to engage with the engaged means. A seismic isolation assist device characterized in that: 3. Each of the engaging means and the engaged means is
3. The seismic isolation assisting device according to claim 2, comprising planar portions (5a) and (6a) that can be in close contact with each other. 4. The relief according to claim 3, wherein each of the planar portions (5a) and (6a) is subjected to a concave-convex processing for increasing a frictional resistance at the time of engagement. Earthquake assist device. 5. The engaging means is provided so as to be able to move back and forth with respect to the engaged means as the amount of liquid (8) filled in the seismic isolation assist device main body (1a) increases and decreases. Is swingable via the fulcrum, and decreases when the pendulum body (16) swings when the magnitude of the swing exceeds a predetermined value, and the swing of the pendulum body (16) is stopped. The seismic isolation assist device according to any one of claims 2 to 4, wherein the auxiliary device is configured to increase at times.