JPS6264541A - Laminated structure of thin-layer rubber and metallic plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] L1 Upper 5 and ■±1 The present invention releases horizontal vibration forces such as those caused by earthquakes and constant microvibrations, and stabilizes relatively small structures such as IC manufacturing equipment and precision measurement equipment. It concerns an eight-laminar structure of rubber and metal plates that can be supported.

A laminated structure in which a plurality of thin rubber layers and a plurality of metal plates are integrally laminated alternately has been known as a seismic isolation support device, as shown in Japanese Patent Application Laid-Open No. 60-65873. It is being

The shear modulus G of the rubber layer integrally joined to the metal plate is:
It is independent of the shape of the thin rubber layer, that is, the average diameter d of the joint surface and its thickness t, and is the value of the compressive elastic modulus Ea of the rubber itself, which is about 173, and in the thickness direction of the thin rubber layer, i.e. The apparent compressive elastic modulus Eap in the vertical direction changes depending on the shape of the thin rubber layer, that is, the ratio d/l of the joint surface average diameter d and its thickness t, and increases as this ratio d/l increases. Therefore, as mentioned above, by thinning the rubber layer interposed between multiple metal plates, the rigidity in the thickness direction of the laminated structure can be increased, making it possible to support heavy structures and prevent horizontal imaging during earthquakes. We were able to obtain a laminated structure suitable for a seismic isolation support device that can release power.

゛し　-と　.

However, in the conventional laminated structure,
Since the iI layer rubber and the metal plate are integrally bonded to each other with an adhesive, the gap between the metal plates is reduced in order to miniaturize the w4 layer structure so that it is suitable for supporting small structures. If an attempt is made to narrow the gap to 0.7N or less, the actual thickness of the thin rubber layer in this gap will become significantly thinner due to the need for adhesive, which requires a certain thickness, and it will not function as a seismic isolation support device. become unable to do so.

+1 ° The present invention relates to an improvement of a laminated structure of thin rubber and metal plates that overcomes such difficulties, and involves integrating a plurality of aFI rubbers and a plurality of metal plates alternately by vulcanization adhesion. The thin layer rubber is compounded with an adhesion aid that improves its adhesion to the metal plate, and the metal plate is made of a material that has good adhesion to the 'a layer rubber. , the metal plate and the thin rubber layer can be firmly joined together without interposing an adhesive between the metal plate and the thin rubber layer.

Further, in the present invention, 0.1rIIIR<t<0.7
Since the thin rubber layer set within the range of compatibility was integrally bonded to the metal plate by vulcanization bonding without using adhesive, the ratio of the average diameter d of the joint surface of the thin rubber layer to its thickness t was d/ By reducing the average diameter d of the bonding surface of the rubber layer without changing l, it is possible to elastically support a relatively small structure with the required apparent compressive elastic modulus Eaρ, and to release horizontal vibration force. , it is possible to obtain insulation against horizontal vibrations such as earthquakes.

An embodiment of the present invention illustrated in the drawings of FIGS. 1 to 3 will now be described.

The laminated structure 1 of this example has a diameter of 3.51 mm and a thickness of 0.5 mm.
The disk-shaped R layer rubber 2 of JIllI and the one with a slightly larger diameter and a thickness of 0.3. The disc-shaped metal plates 3 are alternately stacked in 38 layers (the number of rubber layers) and integrally laminated by vulcanization adhesion.

In addition, the metal plate 3 has a ratio of copper and zinc of 60 to 70/40.
Cobalt naphthenate (0 to 10 PI(R)) is blended into the thin rubber layer 2 as an adhesion aid to improve the adhesion to the brass. The hardness is 40, and its compressive modulus Eo and shear modulus G are each 16.aKgf/C4.

It is 5.6Kgf/-.

The laminated structure 1 formed in this way is approximately 2m long from front to back and left to right.
Stacked in 8 stages with metal stabilizing plates 4 having the required strength and rigidity, one in each of the four corners, with an interval of A support plate 6 with high strength and rigidity is arranged below the metal stable plate 4 at the lowest stage, and the support plate 6 insulates the vibration force in the vertical direction (not shown). do! ! It is supported by the ground via a shock device.

The illustrated embodiment has d=3.5 CIR, as described above.

Since t = 0.05 ctrr and its shape ratio S is 17.5, even if the compressive stress applied to the thin rubber layer 2 is approximately 40 kg1i, the thin rubber layer 2 can sufficiently withstand this compressive stress. be able to.

In addition, since the four laminated structures 1 are arranged in parallel and stacked in eight stages, the overall vertical spring constant Kv and horizontal spring constant ++ are half the values of each spring constant, As a result of calculation or experiment, the overall vertical spring constant Kv and horizontal spring constant u are: K v = 2.56 x 10' K9/
cmK)l = 1.42 x10'j/cm
It is required as.

The natural frequency F when a structure with mass m is supported by an elastic body with a spring constant is 15007 (g).
When is supported, the vertical natural frequency ν and the horizontal spring constant KH are.

Further, the ratio Fv /FH=A between the vertical natural frequency Fv and the horizontal natural frequency Fu is Fv /Fu =A=42.5, and the vibration insulation property is particularly high against vibration forces in the horizontal direction.

Furthermore, since the thin rubber layer 2 is integrally bonded to the metal plate 3 by vulcanization bonding without using adhesives, there is no need for adhesive application work, streamlining production and greatly reducing production costs. The product quality is uniform and reliable.

Furthermore, since there is no adhesive layer between the we rubber 2 and the metal plate 3, even if the overall thickness of the laminated structure 1 is relatively thin, the actual cumulative thickness of the thin rubber layer 2 is determined by the adhesive layer. It is thicker than the conventional one in which an adhesive layer is interposed, and therefore the vertical spring constant Kv and horizontal spring constant Kn are smaller than that in the one in which an adhesive layer is interposed, and the vibration insulation property is good.

In the embodiment described above, the metal plate 3 was made of brass, which is a type of copper alloy, but it may be made of bronze, copper, zinc, or iron, or plated with these metals.

Furthermore, instead of compounding cobalt naphthenate as an adhesion aid, the thin layer rubber 2 may be compounded with a cobalt salt of octenoic acid, rosin acid, or stearic acid, or may be compounded with silica, resorcinol, hexamethylenetetramine, etc. good.

In the above example, the disc-shaped thin layer rubber 2 with a rubber hardness of 40 and a diameter of 3.5ctaz and a thickness of 045 was laminated integrally on a disc-shaped metal plate 3 by vulcanization adhesion. If the thin rubber layer 2 is set as shown in the table below, the frequency ratio will be as follows.

In the present invention, as described above, the thin rubber layer is integrally bonded to the metal plate by vulcanization bonding instead of using an adhesive, so even if the gap between the metal plates is narrowed, only the thin rubber layer is interposed in this gap. The thickness of the thin rubber layer is O, 1 m < t.
< 0.7ttas, and the average diameter d of the bonding surface of the thin rubber layer can be reduced correspondingly to the thickness t to form a compact laminated structure. As a result, a relatively small structure can be made with the required apparent compressive modulus Ea
Not only can it be elastically supported by p, but also high vibration insulation against horizontal vibrations such as earthquakes can be obtained.

Furthermore, in the 8-thin layer structure of the present invention, the 779-layer rubber and the metal plate are integrally bonded by vulcanization. Since it is made of layers, there is no need to apply an adhesive, reducing the number of man-hours and manufacturing costs.Moreover, the thin rubber layers have a uniform thickness, resulting in a homogeneous laminated structure.

[Brief explanation of drawings]

Fig. 1 is a side view illustrating an embodiment of the laminated structure of thin rubber and metal plates according to the present invention, Fig. 2 is an enlarged side view of the main part thereof, and Fig. 3 is a further enlarged longitudinal section of the main part. Side view, 4th
The figure shows the thin layer rubber in the present invention: a thin layer rubber average diameter d
This is a drawing illustrating the relationship between the thickness and the thickness t. DESCRIPTION OF SYMBOLS 1... Laminated structure, 2... Thin layer rubber, 3... Metal plate, 4... Metal stabilizer, 5... IC manufacturing equipment, 6
...Support plate.

Claims (1)

[Claims] A plurality of thin rubber layers and a plurality of metal plates are alternately and integrally laminated by vulcanization adhesion, and the thin layer rubber is blended with an adhesion aid that improves adhesion to the metal plates, and the The metal plate is made of a material with good adhesion to the thin rubber layer, and the thickness of the thin rubber layer is 0.1 mm<t<
A laminated structure of thin rubber and metal plates, characterized in that the thickness is set within a range of 0.7 mm.