JP2938848B1 - Seismic isolation device - Google Patents

Abstract

[PROBLEMS] To reliably maintain a fixed state with a support during normal times,
Provided is a seismic isolation device that reliably releases a stopper device from a support during an earthquake and that can easily adjust a holding force. A support leg receiving portion for supporting a leg portion of a support is fixed to a base plate portion of a floor by a stopper device in a normal state, and shakes are sensed in an earthquake to release the connection of the stopper device. In a seismic isolation device in which the supporting leg receiving portion allows horizontal movement within the C-shaped base plate portion E, the base plate portion E and the supporting leg receiving portion C are coupled by magnetic force in a normal state, and vibrations are shaken during an earthquake. A seismic isolation device that is a stopper device D that releases the coupling of magnetic force by

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device in which a support is fixed to a floor by a stopper device during normal times and a swinging force is released to a horizontal support during an earthquake.

[0002]

2. Description of the Related Art Conventionally, devices for firmly fixing furniture and the like to floors and walls of houses have been developed in order to minimize the damage of furniture and the like caused by earthquakes. However, it cannot be fixed to the inside of a drawer or the like of furniture or the like, and it is impossible to prevent them from overturning or falling. Also, in the case of a large earthquake, the fixed furniture causes excessive stress on structures such as walls, leading to the destruction of the entire house. In order to solve these problems, as disclosed in Japanese Patent Application Laid-Open No. 2-183060, a seismic isolation device that releases a house from the roll of an earthquake has also been proposed. In the event of an earthquake, the fixing device is disengaged and the supported portion such as a house is allowed to freely move in the horizontal direction relative to the ground support portion. Also, registered utility model 30
No. 28407 also proposes a device for freely moving furniture and the like during an earthquake.

However, the conventional seismic isolation device is disclosed in
Japanese Patent Publication No. 2-183060 is intended for structures such as large houses, and the stopper device is not suitable for furniture with a stopper release mechanism by overturning the block-shaped movement prevention member during an earthquake, and is not suitable for furniture. Was not. Further, the stopper device of Registered Utility Model No. 3028407 has a structure in which a hard sphere is fitted into a dent in normal times, and the fitting is released by vibration during an earthquake. These stopper devices have problems that the adjustment of the holding force of the stopper is not easy and the fixed state in normal times is not reliable. In the case of the suspension type seismic isolation device,
Although the use of magnets as -135629 has also been proposed, it uses a repulsive force of the magnet to lift the support, which is the target device, and uses a magnet to fix the support during normal times. is not.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to reliably maintain a fixed state with a support during normal times and to connect a support of a stopper device to a floor during an earthquake. The present invention is to provide a seismic isolation device capable of reliably canceling the force and easily adjusting the holding force.

[0005]

The inventor of the present invention has conducted intensive studies in view of the above-mentioned prior art. As a result, the support leg receiving portion C for supporting the leg portion B of the support A is normally provided with a stopper device. In a seismic isolation device that is fixed to the floor and detects the shaking during an earthquake to release the stopper device and allows the support leg receiving portion C to move horizontally in the dish-shaped base plate portion, the base plate and the support member are used in normal times. Is a stopper device that is coupled by magnetic force, and is a stopper device that releases the coupling of magnetic force by vibration during an earthquake.By using the coupling force of magnetic force, the seismic isolation device can fix the fixed state with the support at normal times. In the event of an earthquake, securely release the stopper device from the support,
This is a seismic isolation device that allows easy adjustment of holding force. Further, another invention is a seismic isolation device in which a support leg receiving portion is provided with an elastic member that absorbs vibration from above, and does not apply vibration to the stopper device from the legs, that is, from above. Is a seismic isolation device that has a rotation-prevention mechanism that prevents rotation in the support leg receiving part, and more reliably maintains the fixed state with the support in normal times.It freely rolls at the bottom of the support leg receiving part This is a seismic isolation device provided with a main ball to be provided and a concave portion fitted with a part of the main ball in a dish-shaped base plate.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an installation state of a seismic isolation device to which the present invention is applied. FIG.
As shown in FIG. 2, a support A which is a bed is supported by four support legs B. The support legs B are a pair of support legs C1 having a pair of stopper devices D and a pair of support legs C1 having no stopper devices. It is supported by the support leg receiving portion C2.
The diagonal line of the pair of support leg receiving portions C1, the support leg receiving portion C2, and the diagonal line are provided so as to intersect with each other, and are fixed to the base plate portion E arranged on the floor. Note that the support is not limited as long as it is a structure that requires a seismic isolation function, such as furniture, a showcase, and a piano, in addition to the above bed.

As shown in FIG. 2, the main parts of the seismic isolation device of the present invention include a support leg receiving portion C1, a stopper device D, and a base plate portion E.

As shown in FIGS. 2 and 3, the support leg receiving portion C1 is fixed to a ring 1 for receiving the support leg B, and a spring 3 which is an elastic member is provided between the ring 1 and the socket 2. The spring 3 is connected elastically via a spring, and the spring 3 is
, A lid 2-2 is fitted above the socket 2. Further, the ring 1 is provided with a set screw 1-3 which is fitted in the elongated hole 2-3 provided in the socket 2 so that the set screw 1-3 can move up and down freely but is prevented from rotating. A joint plate 4 for connecting the stopper portion D is fixed to a lower portion of the socket 2, and a movable mechanism 5 is fixed to a lower portion of the socket 2 via the joint plate 4.

The ball 5-1, which freely rolls, is provided on the ball holder 5-1 of the movable mechanism 5 with a plurality of bearing balls 5-3.
The ball holder 5-1 is fitted with a ring-shaped thick cushion rubber 5-4 as an elastic member, and cooperates with a spring 3 between the ring 1 and the socket 2. Thus, a cushion caster for the leg A is configured as a whole. The main ball 5-2 is for freely moving on the plane of the base plate 6 of the circular base plate portion E, and the base plate 6 is circular and the edge is raised in a dish shape to form the edge 6-1. The main ball 5-2 restricts large dissociation from the main ball 5-2, and a recess 6-3 is provided at the center for better sitting of the main ball 5-2. A support part 6-4 for providing the stopper part D is provided in a part.

FIGS. 4 (a), 4 (b) and 5 (a), 5 (b) show a more detailed configuration of the ring 1, the socket 2, and the spring 3 which constitute the main part of the cushion caster. explain. The leg B is fixed to the ring 1, and the internal space of the socket 2 is a spring holder 2-1 for storing the spring 3.
The spring holder 1-1 of the ring 1 is provided with six bottomed holes for accommodating coil springs, three of which are large-diameter bottomed holes 1 for accommodating the spring 3-1 having a large coefficient of restitution. -5, and the other three are small-diameter bottomed holes 1-4 for accommodating the springs 3-2 having a relatively small coefficient of restitution, and are arranged alternately with a balance. In this way, by inserting springs with different coefficients of restitution elastically between ring 1 and socket 2,
A cushion caster that absorbs various vibrations from above is configured.

The details of the stopper device D are shown in FIG.
In the stopper device D, a stopper portion D is provided on a support portion 6-4 on the extended end outside the joint plate 4 fixed to the lower portion of the socket 2 and on the corresponding side of the base plate 6. A lower stopper mechanism 7 is provided on the support portion 6-4 on the side of the base plate 6, and the lower stopper mechanism 7 is fixed to a sliding member holder 7-2 via a holder support portion 7-1. Fitting hole 7-3 of member holder 7-2
A sliding member 7-4 made of a magnetic material is fitted to the top and bottom of the fitting hole 7-3 of the sliding member holder 7-2 so as to be slidable up and down.
5 is fixed, the magnet 7-6 is also fixed on the upper part of the sliding member 7-4, and the sliding member 7-4 is fixed on the side of the sliding member holder 7-2.
A long hole 7-8 is provided to make the pin 7-7 provided on the slidable up and down but prevent rotation.

On the other hand, an upper stopper mechanism 8 is provided at an end extending outside the joint plate 4 fixed to a lower portion of the socket 2. The upper stopper mechanism 8 will be described in detail. A stand 8-1 is erected at the other end of the joint plate 4, and a pendulum mechanism is provided at a free end of a plate 8-2 fixed on the upper portion of the stand 8-1. However, a ball holder 8-3 is provided at a free end of the plate 8-2, and an end ball 8-5 of a pendulum arm 8-4 is swingably fitted to the ball holder 8-3 to freely swing. At the end, a weight 8-6 for a pendulum is fixed, and the weight 8-6 is a magnetic material and is coupled to the magnet 7-6 above the movable member 7-4. The upper part of the ball holder 8-3 is sealed by a lid 8-7,
The pendulum mechanism at the lower end of the ball holder 8-3 is protected by the bottomed case 8-8.

[0013]

Next, the operation of the embodiment of the present invention, which is constructed as described above, will be described. In normal times, as shown in FIG. 6, a lower stopper mechanism 7 is provided on the support portion 6-4 on the side of the base plate 6, and an upper stopper mechanism 8 on the other end of the joint plate 4 fixed to the lower portion of the socket 2. The magnet 7-6 above the movable member 7-4 of the lower stopper mechanism 7 and the magnetic weight 8-6 of the pendulum mechanism of the upper stopper mechanism 8 are firmly connected by magnetic force, and the support leg receiving portion C1 is It will be fixed to the base plate part E fixed to the floor.

On the other hand, at the time of an earthquake, as shown in FIG. 7, the weight 8-6 provided at the free end of the pendulum arm 8-4, which is a pendulum mechanism, swings right and left mainly due to horizontal rolling. The connection between the weight 8-6 and the magnet 7-6 above the sliding member 7-4 is released. Then, the magnet 7 above the sliding member 7-4
When the slide member 7-4 is disengaged from the slide member 7-4, the slide member 7-4 falls and is fixed to the lower portion of the magnet 7-5 at the bottom of the fitting hole 7-3 of the slide member holder 7-2 by magnetic force. Therefore, the sliding member 7-4 is not fixed to the weight 8-6 of the pendulum mechanism again, and the support leg receiving portion C1 is free to move with respect to the base plate portion E fixed to the floor, and the lock is released. When released, the support is in a floating state even if the floor sways to the left or right in the horizontal direction, and does not follow the sway in the horizontal direction and has a seismic isolation function. As described above, since the magnet is used for the stopper mechanism, the lock at the time of normal operation is surely ensured, the fixed state with the support is reliably maintained, and no malfunction occurs. Disengagement of the connection is surely maintained. Adjustment of the coupling force of the stopper mechanism can be achieved by simply changing the magnets 7-6 with different magnetic forces and the weights of the weights 8-6. .

In normal times, the stopper function must work effectively. However, in order to securely fix the support leg receiving portion C1 to the base plate portion E, as shown in FIG. The portion B is supported by a supporting leg receiving portion C1 having a pair of stopper portions D and a pair of supporting leg receiving portions C2 having no stopper mechanism. Then, the diagonal lines of the supporting leg receiving portions C1 and C2 are arranged to intersect with each other, and the center of the stopper portion is arranged on the diagonal line of the pair of supporting leg receiving portions C1 as shown in FIG. Thereby, it is more securely fixed. The support leg receiving portion C2 is, as described above, a joint plate.
4 and that there is no upper stopper mechanism 8 provided on this,
Except for the absence of the lower stopper mechanism 7 on the side of the base plate 6, the configuration is the same as that of the support leg receiving portion C1, and the support leg receiving portion C2 is always in a state where it can freely move on the base plate 6.

This is apparent from the consideration of the case where the stopper device D is installed off the diagonal line as shown in FIG. 9, and a comparison between FIGS. 8 and 9 will be made. The intersection of a circle having a radius L around the support leg receiving portion C1 and a circle having a radius r around the stopper device D of the opposing supporting leg receiving portion [C1] is a center point of the supporting leg receiving portion [C1]. And the [01] point. On the other hand, when the stopper device is installed on a diagonal line L of the pair of support leg receiving portions C1 as shown in FIG. 8, a circle having a radius L around the support leg receiving portion C1 and the opposing support leg receiving portion [ At the intersection of the stopper device [D] with the circle having the radius r, there is only one point of the center point of the support leg receiving portion [C1], and there is only one position where the support leg should fit. Therefore, the fixing is assured.

However, the actual device has a play or a gap, and the arrangement of the stopper device D is different from that of the supporting leg receiving portion C
1, there is a case where it is not accurately arranged on the diagonal line of [C1].
It is preferable that the rotation is prevented by the set screw 1-3. Further, in order to improve the seating of the main ball 5-2 at the lowermost part of the support leg receiving portion C1, if a concave portion 6-3 that fits a part of the main ball 5-2 is provided, the support leg receiving portion is further improved. C1 is securely fixed by the base plate portion E.

Ring 1 at support leg receiving portions C1, C2
Since the spring 3 is interposed between the socket 2 and
Vibration from the legs, that is, vibration from above is blocked to prevent malfunction. Further, since a plurality of springs having different restitution coefficients are combined, vibrations of a wide range can be absorbed. In addition, a ring-shaped thick cushion rubber 5-4 is fitted around the outer periphery of the ball holder 5-1. In cooperation with the spring 3, which is an elastic member, vibration from above is more reliably blocked. Malfunctions are prevented, and a cushion caster is configured for the leg A as a whole. In addition, the cushion rubber 5-4 slides against the base plate 6 to prevent horizontal movement in normal times.

Another embodiment of the structure of the cushion caster for the leg A is shown in FIG. 10. When the spring 3 is disposed in the hollow shaft of the leg B, the support leg C1 is provided.
A more compact cushion caster is provided by providing a small-diameter spring 3-3 at the center of the spring, and concentrically arranging the springs 3-4 with an inner diameter larger than the outer diameter of this spring so that they have different repulsion coefficients. Becomes

The present invention is, of course, not limited to the embodiment described above. For example, a combination of a support leg receiving portion C1 having a stopper device and a support leg receiving portion C2 having no stopper device is provided. The arrangement and the arrangement may be freely set as long as the fixed state with the support is reliably maintained at normal times, and all four may be the support leg receiving portions C1 having the stopper device, or may be four or more. You may. The weight 8-6 is a magnetic material, and is
Although the configuration is such that the magnet 7-6 is coupled to the upper part of the weight -4, the magnet may be fixed to the bottom surface of the weight 8-6 and the movable member 7-4 may be coupled as a magnetic material. Similarly, a magnet may be provided on the bottom surface of the movable member 7-4, and the bottom of the fitting hole 7-3 may be made of a magnetic material.

[0021]

As described in detail above, claim 1 of the present invention
In, the peacetime fixed to the floor support body by the stopper device, in a seismic isolation device for releasing a swinging force to the horizontal direction of the support at the time of earthquake, pendulum machine stopper mechanism
The pendulum arm 8-4 and the sliding member 7-4
The lock combined with the magnets 7-6 ensures secure locking, maintains the fixed state with the support during normal times, and prevents malfunctions from vibrations other than earthquakes. On the other hand, during an earthquake ,
This has the effect of more reliably releasing the connection of the stopper device with the support, and maintaining the release state to ensure that the support is free from horizontal shaking to ensure seismic isolation. ing. Further, in the second aspect, since the supporting leg receiving portion is provided with the elastic member for absorbing the vibration from above, the vibration from above is not applied to the stopper device, so that there is no malfunction, and furthermore, the third embodiment has the following advantages. It is provided with a rotation preventing mechanism for preventing rotation in the support leg receiving portion Rutoto
Moni, extends outside the joint plate 4 of the support leg receiving portion C
And the corresponding support on the side of base plate 6
After installing the stopper device D on the holding part 6-4, install the support
In this case, the fixed state with the supporting body in the normal state is more reliably maintained, and in claim 4, a main ball which freely rolls is provided at the lowermost portion of the supporting leg receiving portion, and the main ball is provided in the dish-shaped base plate. Since the concave portion that fits into a part of the main ball is provided, the seating of the main ball is good, and there is an effect that the alignment is convenient.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an installation state of a bed to which a seismic isolation device of the present invention is applied.

FIG. 2 is an exploded perspective view of the entire seismic isolation device of the present invention.

FIG. 3 is a sectional view of the seismic isolation device of FIG. 3;

4A and 4B are exploded views of an elastic member of the seismic isolation device of the present invention.

5 (a) and 5 (b) are arrangement views of a spring in FIG.

FIG. 6 is a perspective view of a stopper device D of the seismic isolation device of the present invention.

7 is a cross-sectional view of the stopper device D in FIG.

FIG. 8 is an optimal arrangement diagram of the supporting leg receiving portion C1 and the supporting leg receiving portion C2 having no stopper device.

FIG. 9 is an inappropriate arrangement diagram of the supporting leg receiving portion C1 and the supporting leg receiving portion C2 having no stopper device.

FIG. 10 is an exploded view of another embodiment of the elastic member of the seismic isolation device of the present invention.

BRIEF DESCRIPTION OF THE SYMBOLS A Supporting body B Leg C1 Support leg receiving part with stopper device C2 Support leg receiving part without stopper device D Stopper device E Base plate part 1 Ring 2 Socket 3 Spring 4 Joint arm 5 Moving mechanism 5-2 Main ball 5-4 Cushion rubber 6 Base plate 6-3 Recess 7 Lower stopper mechanism 7-5 Magnet 7-8 Magnet 8 Upper stopper mechanism 8-4 Pendulum arm 8-6 Weight of magnetic material

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16F 15/02-15/08 E04H 9/02

Claims (4)

(57) [Claims] 1. In a normal state, a supporting leg receiving portion C for supporting a leg portion B of a support body A is fixed to a floor base plate portion E by a stopper device D, and in the event of an earthquake, shaking is sensed and the coupling of the stopper device D is released. In the seismic isolation device in which the support leg receiving portion C allows horizontal movement in the dish-shaped base plate portion E, the stopper device D is a pendulum mechanism.
Pendulum arm 8-4 and falling sliding member 7-4 magnet 7-
6. A seismic isolation device characterized by comprising a stopper device D for coupling the support leg receiving portion C and the base plate portion E by magnetic force during normal times and releasing the magnetic force by vibration of vibration during an earthquake. apparatus. 2. The seismic isolation device according to claim 1, wherein the supporting leg receiving portion C is provided with an elastic member that absorbs vibration from the leg portion, and does not apply vibration from above to the stopper device. Wherein the support leg receiving portion C provided the rotation preventing mechanism to prevent rotation Rutotomoni, join support leg receiving portion C
Plate 4 and the corresponding base
A stopper device D is installed on the support 6-4 on the side of the plate 6.
Digit seismic isolation device according to claim 1 or claim 2. 4. A freely rolling main ball 5-2 is provided at the lowermost portion of the support leg receiving portion C, and a concave portion 6-3 for fitting a part of the main ball is formed in a dish-shaped base plate 6. The seismic isolation device according to claim 1 provided.