JP4990220B2 - Seismic isolation device - Google Patents

Description

  The present invention relates to a seismic isolation device that works effectively from a slight vibration to a large earthquake.

  In general, an elastic sliding bearing in which an elastic bearing is coupled to a sliding bearing is known (see Patent Document 1).

This elastic sliding bearing makes it possible to release the rolling with a small amplitude on the ground side before the sliding bearing starts to slide by the deformation of the rubber which is the elastic bearing, but after the predetermined deformation of the rubber is exceeded, the sliding The bearing can handle it.
JP 11-190149 A

  Such elastic sliding bearings can handle rolling with a certain small amplitude, but require severe vibration tolerances for micro-vibrations that occur during normal times, such as traffic vibrations, wind vibrations, and small earthquakes. In a production facility of a precision machine factory, it is difficult to ensure a stable operation by satisfying the required vibration tolerance.

  Further, if the rigidity of the seismic isolation layer is increased in order to suppress micro vibrations, the earthquake input will be increased.

  In order to satisfy these requirements, it is necessary to install separate seismic isolation materials that are effective against micro-vibrations and those that are effective against large earthquakes, resulting in higher costs and more space.

  The object of the present invention is to ensure both the strict vibration tolerance required for micro vibrations in normal times and safety against large earthquakes, and to achieve compactness and space saving in the seismic isolation pit, Furthermore, it is providing the seismic isolation apparatus which can hold down cost low.

In order to achieve the above object, the seismic isolation device of the present invention has a fixed-side slip plate attached to either one of the upper footing and the lower footing, and the other is integrally provided with a slip material that comes into contact with the fixed-side slide plate. An elastic sliding bearing with a laminated rubber attached thereto, an oil damper for fine vibration connected to a support provided on the footing on the laminated rubber attaching side and one end attached to an attaching member provided on the sliding material side, and Have
The two oil dampers for fine vibration are arranged at least at two positions on both sides of the laminated rubber, with a center line passing through both sides of the laminated rubber and an axis orthogonal to each other.
The sliding material is supported by a sliding material support plate,
The mounting member is provided on a mounting plate attached to a sliding material support plate,
The elastic sliding bearing and the fine vibration oil damper are unitized in advance .

  According to the present invention, by combining an oil damper for fine vibrations, a high damping effect is obtained for fine vibrations during normal times such as traffic vibrations, wind fluctuations, and small earthquakes required in production facilities of precision machinery factories. In addition to enabling stable operation, elastic sliding bearings can exhibit seismic isolation effects to ensure safety against large earthquakes and prevent major damage from occurring.

  In addition, by arranging two oil dampers for micro vibrations at least on both sides of the laminated rubber with the center line passing through both sides of the laminated rubber and the axis orthogonal to each other, it is compact and saves space in the seismic isolation pit. This can be realized and the cost can be kept low.

In the present invention, the sliding member is supported on the sliding member supporting plate, said mounting member, so that attached to the attachment plate attached to the sliding member supporting plate.

  By adopting such a configuration, it is possible to easily and reliably attach the oil damper for microvibration by making effective use of the existing elastic sliding bearing, and to further reduce the cost. .

Further, in the present invention, the elastic sliding bearings and micro vibration oil damper is to be pre-unitized.

  By adopting such a configuration, it is possible to perform factory production, and it is possible to reduce manufacturing costs, construction labor, construction time, and construction costs.

  Embodiments of the present invention will be described below with reference to the drawings.

  1-4 is a figure which shows the seismic isolation apparatus concerning one embodiment of this invention.

  FIG. 1 is a front view of the seismic isolation device according to this embodiment, FIG. 2 is a plan view of the seismic isolation device, and the seismic isolation device 10 includes a lower footing 12 on the ground side, as shown in FIG. It is installed between the upper footing 14 on the structure side and does not transmit the vibration on the ground side to the structure side.

  As shown in FIG. 2, the seismic isolation device 10 includes an elastic sliding bearing 16 and a fine vibration oil damper 18.

  The elastic sliding support 16 has a fixed sliding plate 20 attached to the upper surface of the lower footing 12, a sliding material 22 attached to the lower surface of the upper footing 14, and a laminated rubber 24.

  The sliding plate 20 is made of stainless steel and is larger than the sliding material 22.

  The sliding material 22 is in surface contact with the sliding plate 20 on the fixed side, and exhibits a seismic isolation effect by causing slippage between the sliding plate 20 and a laminated rubber 24 on the lower surface side of the laminated rubber 24. 24 is provided integrally.

  Specifically, as shown in FIG. 3, the sliding material 22 is made of resin and is integrally provided on the lower surface side of the steel sliding material support plate 26, and the sliding material support plate 26 is laminated rubber 24. It has come to be integrated with.

  The laminated rubber 24 is integrally formed between the upper and lower circular end steel plates 28 and 30 so that the lower end steel plate 30 and the sliding material support plate 26 are connected. Yes.

  A connecting steel plate 32 is attached on the upper end steel plate 28, and the connecting steel plate 32 is attached to the upper footing 14.

  Further, an attachment plate 34 for attaching an oil damper for fine vibration is integrally attached between the lower end steel plate 30 and the sliding material support plate 26.

  The mounting plate 34 is formed in a square shape, and mounting pieces 36 are formed so as to protrude from end portions that are symmetrical with respect to opposite sides.

  The fine vibration oil damper 18 exhibits a high damping effect against fine vibrations such as traffic vibrations, wind fluctuations, and small earthquakes that occur in normal times. From the lower surface of the upper footing 14 at one end facing the mounting piece 36. It is attached to the suspended support body 38, and the other end is attached to the attachment piece 36 side at the opposite position.

  That is, two fine vibration oil dampers 18 are arranged in parallel with two parallel sides of the mounting plate 34.

  In this case, it is necessary to arrange at least two oil dampers 18 for fine vibration in parallel with at least two parallel sides of the mounting plate 34. However, as shown by a two-dot chain line in FIG. You may make it arrange | position 4 pieces in total, two in parallel with 2 sides.

  One end of each fine vibration oil damper 18 is attached to the support 38 via a ball joint 44, and the other end is attached to a mounting member 42 mounted on a mounting piece 36 as shown in FIG. 40 is attached.

  As described above, in the present embodiment, by combining the elastic sliding bearing 16 with the fine vibration oil damper 18, normal times such as traffic vibrations, wind fluctuations, small earthquakes, etc., which are required in production facilities of precision machinery factories, etc. High damping effect against small vibrations, enabling stable operation, and elastic sliding bearing 16 provides seismic isolation effect to ensure safety in case of a large earthquake, causing major damage Can be prevented.

  In addition, by arranging the oil damper 18 for fine vibration in parallel with the side of the rectangular mounting plate 34, it can be made compact, space saving can be realized in the seismic isolation pit, and the cost can be kept low. .

  When the square mounting plate 34 is not used, two fine vibration oil dampers 18 are arranged at least on both sides of the laminated rubber 24 with the center line passing through both sides of the laminated rubber 24 and the axis orthogonal to each other. There is a need to.

  Furthermore, by providing the attachment member 42 on the attachment plate 34 attached to the attachment piece 36 of the sliding material support plate 26, the existing elastic sliding bearing 16 can be effectively utilized, and the oil damper 18 for micro vibration can be easily attached. In addition, it is possible to reliably perform the process and further reduce the cost.

  The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.

  For example, in the present invention, by making the seismic isolation device unitized in advance with an elastic sliding bearing and a fine vibration oil damper, it is possible to produce a factory, reducing manufacturing costs, labor of construction, construction time and construction costs. Reduction can be made possible.

  In this embodiment, the sliding plate on the fixed side is provided on the lower footing and the sliding material is provided on the upper footing side. However, in this case, the elastic sliding bearing and the oil damper for fine vibration may be provided. May be reversed.

It is a front view of the seismic isolation apparatus concerning one embodiment of the present invention. It is a top view of the seismic isolation apparatus of FIG. It is a longitudinal cross-sectional view of the elastic sliding support part of FIG.1 and FIG.2. It is an enlarged front view which shows the attachment state of the oil damper for fine vibrations, and an attachment member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Seismic isolation device 12 Lower footing 14 Upper footing 16 Elastic sliding bearing 18 Micro vibration oil damper 20 Sliding plate 22 Sliding material 24 Laminated rubber 26 Sliding material support plate 34 Mounting plate 38 Support body 42 Mounting member

Claims (1)

An elastic sliding bearing in which a fixed sliding plate is attached to one of the upper footing and the lower footing, and a laminated rubber integrally provided with a sliding material that contacts the fixed sliding plate is attached to the other, and the laminated rubber attached One end is attached to a support provided on the side footing, and the other end is connected to an attachment member provided on the sliding material side, and a fine vibration oil damper is provided.
The two oil dampers for fine vibration are arranged at least at two positions on both sides of the laminated rubber, with a center line passing through both sides of the laminated rubber and an axis orthogonal to each other.
The sliding material is supported by a sliding material support plate,
The mounting member is provided on a mounting plate attached to a sliding material support plate,
The seismic isolation device, wherein the elastic sliding bearing and the fine vibration oil damper are unitized in advance .

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