JP3323804B2 - Rail for seismic isolation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a rail used for a so-called rolling type seismic isolator using a combination of a rail and wheels or rollers in a seismic isolator against earthquake motions of buildings, machines, objects, and the like.

[0002]

2. Description of the Related Art Conventionally, the shape of the rolling surface of a rail used in a rolling seismic isolation device is such that a central portion is a minimum portion or a maximum portion depending on a support or a supported member side, and a left and right middle portion and a left and right end are formed. In addition, a concave surface is formed by three symmetrical portions. That is, the central part is a smooth curved surface such as an arc so that rolling can be performed smoothly, the left and right middle part is a surface drawn by a straight line, an arc, a parabola, a hyperbola or other special functions, and the left and right ends are A shape that can provide a stopper function so that the wheels or rollers do not escape from the rail, for example, a steeply rising end, rubber, a hydraulic damper, a spring, or the like is used. In particular, the shape of the left and right intermediate portion, which is the core of the rolling surface, is determined so that an appropriate response acceleration can be obtained by inputting an earthquake waveform and performing computer analysis. In order to manufacture rails having such complicated shapes and their combinations, block-shaped single materials such as carbon steel and stainless steel are processed by laser cutting under NC control in accordance with seismic isolation devices, and then surface precision finishing is performed. Was generally performed.

[0003]

As described above, the conventional rail manufacturing requires sophisticated technology such as laser processing of NC control because of its complicated shape as described above. Control is required, and the processing cost is significantly increased. Further, it is necessary to manufacture a rail having a suitable load resistance in each case according to the weight of a building, a container, or the like, so that the production of a single product has low productivity and requires a long delivery time. On the other hand, an object of the present invention is to provide a rail for a seismic isolation device which has a simple structure, is easy to manufacture, is inexpensive, and can quickly respond to a required load-bearing size.

[0004]

According to the present invention, in order to achieve the above object, according to the first aspect of the present invention, a central portion is formed in a concave shape forming a minimum portion or a maximum portion at a longitudinal edge. A plurality of slender plate members are stacked and integrated, and the rolling element can reciprocately roll by the seismic motion with the concave edge as a rolling surface, and a thin coating material is attached to the rolling surface of the stacked plurality of slender plate members. The problem was solved by the seismic isolation device rail. According to the second aspect of the present invention, a plurality of elongated plate members having a concave opening formed at a central portion thereof as the lowest portion or the highest portion in the longitudinal direction are superposed and integrated, and the rolling element is loosely mounted. The problem is solved by a rail for a seismic isolation device in which the rolling element can reciprocately roll due to seismic motion using the edge of the concave opening as a rolling surface. According to the third aspect of the present invention, a thin covering material is attached to the rolling surfaces of the plurality of elongated plate materials that have been polymerized.
The rail for the seismic isolation device described in the above.

[0005] Among the components used for the rail for the seismic isolation device of the present invention, the common components will be described. Any support can be used as long as the rail for the seismic isolation device can be fixed. For example, floors, ceilings, foundations, or fixings on these
There are fixed objects or structures. As the supported body, OA equipment, medical equipment, art objects, objects such as suspended articles, and buildings such as ordinary houses, medium- and low-rise condominiums and buildings or structures supporting these seismic isolated objects Things are included. As the material of the elongated plate material, carbon steel, stainless steel, cast iron,
Hardwood, hard plastic, FRP, glass, ceramic, etc. can be used, and the material and size are selected according to the weight and use conditions of the supported body, but carbon steel and stainless steel are widely used, and hard plastic, FRP, etc. For light loads. As a means for processing a concave edge or a concave opening into an elongated plate material, press punching is most suitable because it has high precision, can be mass-produced, and is low in cost.However, since the material is a plate material, it is relatively suitable even with a laser cutter. It can be easily processed. As for the number of superposed elongated plate members, the rail width is determined by the required withstand load, so that the number may be selected according to the width.

[0006]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a rail for a seismic isolation device having a basic structure of the present invention, (a) front view, (b) enlarged side view, and (c) (a) and (b) of the rail for the seismic isolation device. It is a front view which shows an elongated plate material. FIG. 2 shows an example of a seismic isolation device using the rail for the seismic isolation device of FIG.
(B) It is a front view. 3A and 3B show another example of the rail for the seismic isolation device of the present invention.
It is a center sectional view showing a modification of a rail for seismic isolation devices of (c), (a), and (b).

In FIG. 1, a rail 1 for a seismic isolation device having a basic structure of the present invention has a single elongated plate member 2 for a support body side, and a center portion at one side of a longitudinal edge is minimum. The support is formed in such a manner that a plurality of loosely formed concave portions are superposed on each other and the outer surfaces thereof are sandwiched between a pair of holding members, ie, angle irons 3, so that the concave edges become the rolling surfaces 5 of the wheels 4. 6 is fixed. The elongated plate 2 has a plurality of small holes 7 along the other side of the longitudinal edge.
A small hole 3a is also drilled at one side of the angle iron 3 at a position corresponding to the small hole 7 of the elongated plate member 2. The overlapped elongated plate member 2 includes a plurality of bolts 8 Is each small hole 3a
And tightened by a nut 9 to be integrated. On the other side of the angle iron 3, small holes 3 b are formed at respective intermediate positions between the small holes 7, and a plurality of screw bolts 10 are inserted into the small holes 3 b and screwed into the support 6. A plurality of elongated plate members 2 that are attached and stacked are fixed to a support 6. In this example, the polymerized elongated plate material 2
Are pressed together by bolts 8 and nuts 9, but in the case of a light load, the bolts 8 and the like are not used and are simply clamped by the angle iron 3 and fixed to the support 6 by the screw-in bolts 10. May be. In the case of a light load, a molded angle member such as hard plastic or FRP may be used instead of the angle iron 3. When the above-mentioned rail 1 for the seismic isolation device is to be used for the supported body, the other side of the angle iron 3 may be fixed to the supported body by using it upside down. Also, whether the holding material is not a pair of angle irons but one and the other is a long bar with a rectangular cross section,
A pair of long bars may be used, and at least one of them may be fixed to the support or the supported body. And
The rail for the seismic isolation device of the present invention will be described with reference to FIG.
A thin covering material is attached.

In FIG. 2, a seismic isolation device 11 using a lower rail 13 and an upper rail 15 having the same configuration as the seismic isolation device rail 1 is mounted between the support 6 and the supported member 12. Four lower rails 13 fixedly arranged in two rows in two rows on the support 6 in parallel, four lower wheels 14 separately engaging with each lower rail 13, and a lower surface of the supported body 12 , Four upper rails 15 fixed in two rows at a right angle to the lower rail 13 in two rows, four upper wheels 16 separately engaged with the respective upper rails 15, and each lower wheel 14
And a support member 17 for rotatably supporting the upper wheel 16. Next, the operation of the seismic isolation device 11 when an earthquake motion occurs will be described. Normally, lower wheel 1 of seismic isolation device 11
4. The upper wheel 16 is located at the lowest or highest position in the center of the lower rail 13 and the upper rail 15, respectively, and the supported body 12 is stationary on the support 6 in a stable state.
When a seismic motion in the left-right direction X shown in FIG. 2A occurs, the lower wheel 14 rolls on the concave surface of the lower rail 13 and swings right and left, and the supported body 12 moves from the lowest position of the lower rail 13. It receives the restoring force according to the displacement, and in addition, the seismic isolation works by the frictional force. When a seismic motion in the front-rear direction Y occurs, the upper wheel 16 rolls on the concave surface from the highest position of the upper rail 15 and swings back and forth, and the seismic isolation action is performed similarly to the lower wheel 14 and the lower rail 13. work. Since the actual earthquake motion is generated by a combination of the vibration in the left-right direction X and the vibration in the front-rear direction Y, the supported body 12 oscillates to the combined position corresponding to the earthquake motion in each direction, and the seismic isolation action is performed. .

3 (a) and 3 (b), a rail 18 for a seismic isolator according to another embodiment of the present invention has a single elongated plate material 19 in which a gentle concave opening 20 is substantially constant in the longitudinal direction. A rectangular cross-section groove 22 formed in the support 21 with a plurality of sheets formed by being pierced with a width and being superposed on one another with one edge in the longitudinal direction facing downward.
And are integrated with each other and fixed to the support 21. The concave opening 20 is disposed so that the central part is the lowest part, the lower edge of which is the rolling surface 23, and the wheel 24 is loosely mounted. The wheel 24 supports a supported member (not shown) positioned above, and reciprocates on the rolling surface 23 of the concave opening 20 due to the seismic motion to exert a seismic isolation function on the supported member. When the rail 18 for the seismic isolation device is to be used for the supported body side, the rail 18 may be used by being overturned so that the center of the concave opening 20 becomes the highest part. Rail for this seismic isolation device 1
8, when the seismic force acts on the supported body as an upward force, for example, when a force acts on the feet when the tall and long supported body falls upward, such as a tower, a Buddha statue, or the like;
Alternatively, it is effective to prevent the wheels 24 from floating and coming off the seismic isolation device rail 18 when an extremely intense vertical seismic motion exceeding the gravitational acceleration acts.

In FIG. 3 (c), FIG.
In a seismic isolation device rail 25 of a modified example of the seismic isolation device rail 18 shown in (b), a plurality of the same elongated plate members 19 having the same shape are stacked and loaded into a rectangular box 26 to be integrated. It is a thing. In the rectangular box 26, the elongated plate 1
A concave opening 27 is formed so as to coincide with the concave opening 20 of FIG. 9, and a thin covering material 28 is adhered to the periphery thereof to form a rolling surface of the wheel. As the coating material 28, for example, a stainless sheet or a polyester, epoxy, or fluorine resin coating can be used. The thin covering material 28 not only has the effect of smoothing the rolling of the wheel with respect to the rail 25 for the seismic isolation device, preventing high-frequency vibration caused by the rolling, and improving the seismic isolation performance, but also the rolling of the wheel. It also works effectively for rust prevention on moving surfaces. Rail 25 for this seismic isolation device
Can be directly fixed to the support or the support at the bottom surface 29 or the top surface 30 of the rectangular box 26, and is suitable for, for example, a seismic isolation device of a suspended product. As an example, when a chandelier suspended from a ceiling is subjected to seismic isolation, the rail 25 for the seismic isolation device is fixed to the ceiling surface at the top surface 30 of the rectangular box 26 using the ceiling as a support, and the chandelier is supported. It can be seismically isolated by being suspended via a support member on a wheel loosely mounted in the concave opening 27 as a body.

As means for integrating the polymerized elongated plate members, in addition to those shown in FIGS. 1 and 3, bonding, welding, riveting, or a combination thereof may be used. As a means by the bonding means, it is possible to bond and integrate a plurality of sheets with various adhesives suitable for the veneer material of the elongated plate material, for example, a synthetic resin adhesive such as an epoxy resin.
Suitable for materials such as hard plastic, FRP, metal. As a means of welding, a plurality of single plates of a long and thin plate made of a metal material can be overlapped and brought into pressure contact and integrated by resistance welding, but the periphery except for the rolling surface can be welded by arc welding or gas welding. You may. The above-mentioned bonding or welding may be performed not on the entire surface of a plurality of elongated plate materials laminated but on spots depending on the application.
In the case of an elongated plate as shown in FIG. 1, a rectangular box having no top surface is used, and a plurality of sheets are fitted therein and the rolling surfaces protrude from the rectangular box, so that an integrated plate is formed. It can be used as a rail for seismic equipment.

[0012]

The rail for the seismic isolation device of the present invention is made of a plate material, so that it is easy to manufacture a rail having a complicated shape, the cost is low, and an elongated shape processed into a previously prepared rail shape. There is an advantage that the required load-bearing rail width can be immediately adjusted only by adjusting the number of superposed plate materials. Also, when the seismic isolation device rail is composed of a plurality of elongated plates with a concave opening, they are prevented from coming off the rail when strong vertical seismic motion is applied. It is effective to do. If the rail for the seismic isolation device has a thin covering material affixed to the rolling surface of a plurality of elongated plates, the rolling of the wheel with respect to the rail is smoothed, and the high-frequency vibration caused by the rolling is reduced. It is effective in preventing rust, improving seismic isolation performance, and preventing rust on the rolling surface of wheels.

[Brief description of the drawings]

1A and 1B show an example of a rail for a seismic isolation device having a basic structure of the present invention, (a) front view, (b) enlarged side view, and (c).
It is a front view which shows the elongated plate material of the rail for seismic isolation devices of (a) and (b).

FIGS. 2A and 2B show an example of the seismic isolation device using the rail for the seismic isolation device of FIG.

FIG. 3 shows another example of the rail for the seismic isolation device of the present invention (a).
It is a front view, (b) Central sectional view, and (c) It is a central sectional view showing the modification of the rail for seismic isolation devices of (a) (b).

[Explanation of symbols]

 1, 18, 25 Rail for seismic isolation device 2, 19 Slender plate material 3 Angle steel 3a, 3b, 7 Small hole 4, 24 Wheel 5, 23 Rolling surface 6, 21 Support body 8 Bolt 9 Nut 10 Screw-in bolt 11 Seismic isolation Device 12 Supported 13 Lower rail 14 Lower wheel 15 Upper rail 16 Upper wheel 17 Supporting material 20, 27 Concave opening 22 Cross-sectional rectangular groove 26 Rectangular box 28 Coating material X Left-right direction Y Front-back direction

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16F 15/02 E04H 9/02 331 E04B 1/36 E01B 5/08

Claims (3)

(57) [Claims] 1. A plurality of elongated plate members formed in a concave shape having a central portion forming a minimum portion or a maximum portion in a longitudinal direction edge are superposed and integrated, and the rolling element reciprocates by seismic motion using the concave edge as a rolling surface. A rail for a seismic isolation device, wherein a thin covering material is attached to a rolling surface of a plurality of the elongated plates that are superimposed. 2. An edge of the concave opening in which a plurality of elongated plate members each having a concave opening with a central portion forming the lowest portion or the highest portion in the longitudinal direction are stacked and rolled, and rolling elements are loosely mounted. The rolling element is capable of reciprocating rolling by seismic motion using a rolling surface as a rolling surface. 3. A thin coating material is stuck on a rolling surface of a plurality of superposed elongated plate materials.
Rails for seismic isolation devices described in.