JP4702796B2 - Vibration control cabinet - Google Patents

Description

  The present invention relates to a vibration control cabinet that mitigates shaking such as an earthquake and protects items contained therein, and particularly for electric / electronic devices and electric / electronic devices having a vibration control function for storing precision devices. Suitable for cabinets.

For example, a cabinet that houses electrical / electronic equipment and precision equipment (hereinafter referred to as “electronic equipment, etc.”) can be used to reduce vibrations such as earthquakes and protect these equipment. What is supported by means is known. As the vibration absorbing means, there are a plate spring interposed (Japanese Patent Laid-Open No. 2005-217380) and a combination of a spring and a roller member (Japanese Patent Laid-Open No. 2002-2135130, Japanese Patent Laid-Open No. 2000-320610). Are known.
JP 2005-217380 A JP 2002-213530 A JP 2000-320610 A

  As shown in FIG. 1, the cabinet 100 described above has a double structure of an outer cabinet 101 and an inner cabinet 102, and a vibration absorbing element is disposed between the inner cabinet 102 and the outer cabinet 101. And although illustration is abbreviate | omitted, the impact by the vibration of the earthquake transmitted to an electronic device etc. is relieve | moderated by accommodating an electronic device etc. in the inner cabinet 102. FIG. In such a structure, the front surface 103 of the outer cabinet 101 is used for taking out and operating electronic devices housed in the inner cabinet 102, and the back surface 104 of the outer cabinet 101 is used for wiring the devices housed in the inner cabinet 102. Open each one. For these reasons, a reinforcing structure can be provided on the side surfaces 105 and 106 of the outer cabinet 101, but a sufficient reinforcing structure cannot be provided on the front surface 103 and the rear surface 104 of the outer cabinet 101 (see FIG. 1 is abbreviate | omitting illustration about a reinforcement structure.). For this reason, the outer cabinet 101 can secure strength against shaking in the front-rear direction a, but cannot secure sufficient rigidity against shaking in the left-right direction b. When subjected to earthquake motion, the outer cabinet 101 tends to swing in the left-right direction b. The cabinet 100 wants to mitigate the shock caused by the vibration of the earthquake transmitted to the electronic equipment and the like housed in the inner cabinet 102 and to suppress the shaking of the outer cabinet 101 in the left-right direction b to some extent.

  What is described in said patent document uses the spring element as a vibrational absorption element. The spring element has almost no damping action and little action to consume vibration energy. In addition, the spring element alone hardly obtains an action of absorbing vibration energy, and may resonate with earthquake motion. For this reason, the effect which suppresses a vibration is not fully acquired.

  The inventors consider that the inner cabinet is supported by the sliding bearing device or the rolling bearing device, and that the vibration energy is absorbed by using a viscoelastic body such as rubber instead of the spring element. The viscoelastic body can absorb vibration energy as the amount of shear deformation increases, and has a function of quickly damping the vibration. However, in order to effectively exhibit such a function, it is necessary to select an appropriate material for the viscoelastic material.

The vibration damping cabinet according to the present invention includes an outer cabinet, an inner cabinet disposed inside the outer cabinet, and a vibration damping unit disposed between the inner cabinet and the outer cabinet . is composed of a vibration damping device and the sliding bearing device or a rolling bearing apparatus, the vibration damping device, a laminate obtained by laminating a viscoelastic member and the intermediate plate are alternately Attach between a pair of plates, a pair of plates The one plate is fixed to the inner cabinet and the other plate is fixed to the floor or ceiling material of the outer cabinet . The sliding bearing device or the rolling bearing device extends more than the viscoelastic body of the intermediate plate. and each extending portion is mounted with, as well as supporting the inner cabinet, provided with a sliding or rolling movable sliding bearings material or rolling bearing member to a pair of plates, Viscoelastic body vibration apparatus, the main chain silica was added 100-150 parts by weight of the base rubber 100 parts by weight have C-C bonds at 10 to 30 wt% a silane compound for the silica it is characterized in that to those were.

  According to this vibration control cabinet, 100 to 150 parts by weight of silica is added to 100 parts by weight of the base rubber having a C—C bond in the main chain to the viscoelastic body of the vibration control device, A viscoelastic body containing 10 to 30% by weight of a silane compound is used. This viscoelastic body has both small strain dependency and frequency dependency, and can cope with various vibrations such as small earthquakes and large earthquakes. In addition, the temperature dependence is small, and functions necessary for the vibration control cabinet can be stably exhibited regardless of temperature fluctuations.

  Hereinafter, a vibration control cabinet according to an embodiment of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected and demonstrated to the member and site | part which show the same effect | action.

  As shown in FIG. 2, the vibration control cabinet 10 includes an outer cabinet 11, an inner cabinet 12 disposed inside the outer cabinet 11, and an inner cabinet disposed between the inner cabinet 12 and the outer cabinet 11. The sliding bearing devices 13 and 14 that support the bearing 12 and the vibration damping device 15 disposed between the inner cabinet 12 and the outer cabinet 11 are configured.

  In this embodiment, the outer cabinet 11 includes a rectangular flooring 21, column members 22 erected at the four corners of the flooring 21, and a reinforcing material (not shown) that reinforces the standing state of the column members 22, The ceiling member 23 is arranged on the upper portion of the column member 22. Although not shown, the reinforcing material is provided on the side surfaces 24 and 25 of the outer cabinet 11 and is installed between the column material 22 and the beam material 22 and the floor material 21 or the column material 22 and the ceiling material. 23 and a brace material installed obliquely between the two. The reinforcing material is not provided on the front surface and the back surface of the outer cabinet 11.

  The inner cabinet 12 is disposed inside the outer cabinet 11. In this embodiment, the inner cabinet 12 includes a rectangular lower plate member 26, a column member 27 attached to the corner of the lower plate member 26 in the height direction, and a rectangular upper plate member 28 attached to the upper portion of the column member 27. It is composed. In this embodiment, a mounting portion (mounting hole) is provided in the column member 27 so that a unit (not shown) that accommodates the device can be mounted in a plurality of stages in the height direction. The inner cabinet 12 is installed inside the outer cabinet 11 with a vibration damping device 15 interposed, as will be described later.

  As shown in FIG. 2, the sliding bearing devices 13 and 14 and the vibration damping device 15 are disposed between the inner cabinet 12 and the outer cabinet 11. In this embodiment, as shown in FIGS. 3A and 3B, the sliding bearing devices 13 and 14 and the vibration damping device 15 are unitized into one device (hereinafter, such units are referred to as “vibration damping unit”). "). Of such a vibration damping unit 30, the part functioning as the vibration damping device 15 is obtained by attaching viscoelastic bodies 31 and 32 between a pair of plates 33 and 34. One plate 33 is fixed to the inner cabinet 12, and the other plate 34 is fixed to the floor material 21 or the ceiling material 23 of the outer cabinet 11. In this embodiment, as shown in FIGS. 3 (a) and 3 (b), the portion functioning as the vibration damping device 15 includes a laminated body 40 in which viscoelastic bodies 31 and 32 and intermediate plates 35 are alternately laminated. It is attached between a pair of plates 33 and 34.

  Hereinafter, a specific configuration of the vibration control unit 30 will be described.

  As shown in FIG. 4, the damping unit 30 includes viscoelastic bodies 31 and 32, a pair of upper and lower fixing plates 33 and 34, an intermediate plate 35, a first mounting plate 36, and a second mounting plate 37. The sliding bearing members 38 and 39 are used.

  The part of the damping unit 30 that functions as the damping device 15 is a laminate 40 in which viscoelastic bodies 31 and 32 and intermediate plates 35 are alternately stacked and attached between a pair of fixing plates 33 and 34. is there. In this embodiment, the part functioning as the vibration damping device 15 includes a laminated body 40 in which the first attachment plate 36, the viscoelastic body 31, the intermediate plate 35, the viscoelastic body 32, and the second attachment plate 37 are laminated and fixed in this order. The fixing plates 33 and 34 are attached to the first attachment plate 36 and the second attachment plate 37 on both sides of the laminate 40 in the lamination direction.

  A portion of the vibration control unit 30 that functions as the sliding support devices 13 and 14 includes the intermediate plate 35 of the laminated body 40, a pair of fixing plates 33 and 34, and sliding support members 38 and 39. The intermediate plate 35 of the laminated body 40 extends to the left and right sides of the viscoelastic bodies 31 and 32, and mounting holes 41 and 42 for attaching the sliding bearing members 38 and 39 are formed in such extended portions. ing. For example, when the laminated body 40 is attached to the pair of fixing plates 33 and 34, the sliding support members 38 and 39 are attached to the attachment holes 41 and 42 of the intermediate plate 35 together with the laminated body 40. It is good to interpose between the fixing plates 33 and 34. When the sliding support members 38 and 39 are attached to the pair of upper and lower fixing plates 33 and 34 together with the laminated body 40, the sliding bearing members 38 and 39 are accommodated between the pair of fixing plates 33 and 34, and between the pair of fixing plates 33 and 34. It has a height that can slide.

  For example, the vibration damping unit 30 is configured such that the laminated body 40 and the sliding bearing members 38 and 39 are fixed to a pair of upper and lower sides in a state where the sliding bearing members 38 and 39 are mounted in the mounting holes 41 and 42 of the intermediate plate 35 of the laminated body 40. The first mounting plate 36 is mounted on one fixing plate 33 and the second mounting plate 37 is mounted on the other of the mounting plates 36 and 37 on both sides of the stack 40 in the stacking direction. It may be attached to the fixing plate 34. The vibration damping unit 30 assembled in this manner is disposed between the inner cabinet 12 and the outer cabinet 11, and one of the upper and lower fixing plates 33, 34 is attached to the inner cabinet 12. The other fixing plate 34 is fixed to the outer cabinet 11.

  The vibration damping unit 30 absorbs vibration energy acting on the inner cabinet 12 from the outer cabinet 11 by the shear deformation of the viscoelastic bodies 31 and 32 in the portion functioning as the vibration damping device 15, and is absorbed by the inner cabinet 12. The generated vibration can be reduced. As shown in FIG. 5, the parts functioning as the sliding bearing devices 13 and 14 are configured such that the inner cabinet 12 and the outer cabinet 11 are separated by the sliding bearing members 38 and 39 that slide between the pair of fixing plates 33 and 34. Are supported, and the pair of fixing plates 33 and 34 are relatively displaced in the horizontal direction while maintaining a parallel state. In this embodiment, when there is no portion that functions as the sliding support devices 13 and 14, when the pair of upper and lower fixing plates 33 and 34 are relatively displaced in the horizontal direction, the displacement increases, as shown in FIG. Thus, it is conceivable that a force acts so that one fixing plate 33 rotates with respect to the other fixing plate 34. According to the vibration control unit 30, the fixing plate 33 is supported by the portion that functions as the sliding support devices 13 and 14, and thus such an event does not occur.

  As shown in FIGS. 3A and 3B, the vibration control unit 30 is attached to the floor material 21 and the ceiling material 23 of the outer cabinet 11, respectively. For example, as shown in FIGS. 3A and 3B, the vibration damping device 15 is attached to the floor material 21 and the ceiling material 23 at positions directly below and above the axial direction of the pillar material 27 of the inner cabinet 12. Good. In the vibration damping unit 30, the portion functioning as the sliding bearing device 13, 14 supports the vertical load, and prevents the compressive load from acting on the viscoelastic bodies 31, 32. The vibration damping device 15 attached to the ceiling material 23 side uses a device provided with sliding bearing devices 13 and 14, but the ceiling material 23 requires a vertical load to be supported by the sliding bearing devices 13 and 14. Therefore, a vibration damping device without the sliding bearing devices 13 and 14 may be used.

  Next, the viscoelastic bodies 31 and 32 will be described in detail.

  A general viscoelastic material increases in rigidity and resistance as the amplitude increases. When a viscoelastic body having the property that the rigidity increases as the amplitude increases, the acceleration response of the cabinet and the excessive increase in the stress of each part occur. Therefore, it is desirable to use a viscoelastic body having a property that the increase in rigidity reaches a peak even when the amplitude increases.

  In addition, since it is necessary to function in a wide amplitude range from a small earthquake to a large earthquake, a viscoelastic body having a small strain dependency is used. That is, a material that exhibits stable vibration energy absorption capability from a small strain to a large strain amplitude is used.

Specifically, a stable energy absorption capability of Heq> 0.20 is required in the region of 0.01 ≦ γ ≦ 3.5. Therefore, Keq / (S / D) decreases as γ increases in a region where γ> 1.0 so that the resistance force does not increase in the large amplitude region. For example, a viscoelastic body satisfying 0.45 ≦ Keq / (S / D) ₍ γ _{= 3.0)} } / {Keq / (S / D) ₍ γ _{= 1.0)} } ≦ 0.75 may be used.

Here, γ is the shear strain rate, and is obtained by dividing the shear deformation amount d of the viscoelastic body by the height t of the viscoelastic body, as shown in FIG. In addition, the equivalent viscous damping constant (Heq) and the equivalent shear modulus (Geq = Keq / (S / D)) in the dynamic viscoelasticity test are sinusoidal excitation that causes shear deformation of the viscoelastic material, The hysteresis loop (hysteresis curve) at that time is measured and calculated based on the result. Referring to FIG. 8, Heq is a numerical value calculated by the following equation (Equation 1), and Geq and Keq / (S / D) are numerical values calculated by the following equation (Equation 2).
Heq = ΔW / 2πW (Equation 1)
W: elastic energy of shear deformation (area of two triangles shown in FIG. 8; unit is kgf · cm)
ΔW: Total energy absorbed by shear deformation (area surrounded by hysteresis curve shown in FIG. 8; unit is kgf · cm)
Geq = Keq / (S / D ) = F / U BE / (S / D) ( Equation 2)
F: Load when giving maximum displacement (unit: kgf)
U _BE : Maximum displacement (unit: cm)
S / D: Shape factor of the test sample (sample shear area / sample shear gap, unit is cm)

In general viscoelastic materials, Geq (= Keq / (S / D)) [N / mm ² ] significantly increases with an increase in vibration frequency. For example, in a general viscoelastic body, at 20 ° C., the value of Geq increases two to three times at 0.1 Hz and at 2.0 Hz. Since seismic motion is distributed in the range of about 0.1 Hz to 20 Hz, it is desirable to use a viscoelastic body having a relatively stable property in terms of rigidity and damping performance with respect to these frequencies. Specifically, it is necessary to deal with earthquake motions that have a wider input frequency distribution region. The damping performance imparted to the cabinet by the viscoelastic body can be generally expressed by the product of the rigidity of the viscoelastic body (here, the equivalent shear elastic modulus Geq) and the damping constant (here, the equivalent viscous damping constant Heq). Evaluation of frequency dependence may be performed within a range of ± 50% within a range of 0.1 Hz to 20 Hz of the above-described ground motion based on a certain frequency under a certain temperature condition. .

  In general, viscoelastic bodies have high rigidity at low temperatures and low rigidity at high temperatures. In this embodiment, since it is used for the vibration control cabinet 10 that accommodates an electronic device or the like, for example, it is compared in terms of rigidity and damping performance with respect to a normal room temperature range, for example, a temperature range of about 0 ° C. to 50 ° C. It is desirable to use a viscoelastic body having a stable property.

  For example, if the use environment of the vibration control cabinet 10 is 0 ° C. to 50 ° C., the equivalent shear modulus Geq (t = 0) when the low temperature side is 0 ° C. with reference to Geq (equivalent shear modulus) of 20 ° C. C) and the equivalent shear modulus Geq (t = 20 ° C.) at 20 ° C., Geq (t = 0 ° C.) / Geq (t = 20 ° C.) ≦ 1.7, and the high temperature side is 50 ° C. The ratio of the equivalent shear modulus Geq (t = 50 ° C.) to the equivalent shear modulus Geq (t = 20 ° C.) at 20 ° C., Geq (t = 50 ° C.) / Geq (t = 20 ° C.) It is preferable that ≧ 0.45.

  In this embodiment, in order to give the viscoelastic bodies 21 and 22 the above-described strain dependency, frequency dependency, and temperature dependency, silica is added to 100 parts by weight of the base rubber having a C—C bond in the main chain. 100 to 150 parts by weight, and a high-attenuation rubber containing 10 to 30% by weight of a silane compound based on the silica was used.

By using such a high-damping rubber, the above-described strain dependency, frequency dependency, and temperature dependency can be satisfied. In particular, the performance at 20 ° C. is in the range of Heq ≧ 0.2, 0.35 ≦ Geq ≦ 6.0 (N / mm ² ), and the temperature dependence of Geq is 0 ° C./20° C. ≦ 1 0.7, 50 ° C./20° C. ≧ 0.45 (both frequencies are 0.1 Hz, shear strain is ± 100%).

  FIG. 9 evaluates the performance of the viscoelastic body while changing the addition amount of silica (parts by weight) and the amount of silane compound (% by weight) of the viscoelastic body having the above-described configuration. In this evaluation, natural rubber was used as the base rubber, phenyltriethoxysilane was used as the silane compound, and a tackifier was added at a ratio of 10% by weight.

  In the example, 135 parts by weight of silica is added to 100 parts by weight of the base rubber, and 17% by weight of the silane compound is blended with respect to the silica. In this case, Heq at 20 ° C. is 0.23, which is higher than 0.2, and the above-described function of the vibration damping device 15 can be sufficiently exhibited. Further, the change rate of Geq at 0 ° C./20° C. is 1.47 and 1.7 or less, the temperature dependency on the low temperature side is low, and the change rate of Geq at 50 ° C./20° C. is 0.64. 0.45 or more, and the temperature dependency on the high temperature side is small, so that the above-described vibration damping device 15 can sufficiently exhibit the function as the vibration damping device.

  In Comparative Example 1, 90 parts by weight of silica is added to 100 parts by weight of the base rubber, and 22% by weight of the silane compound is blended with respect to the silica. In this case, the Heq at 20 ° C. is 0.15, which is lower than 0.2, and the above-described vibration damping device 15 cannot fully exhibit the function as the vibration damping device.

  In Comparative Example 2, 135 parts by weight of silica is added to 100 parts by weight of the base rubber, and 7% by weight of a silane compound is added to the silica. In this case, since Heq at 20 ° C. is 0.19, which is lower than 0.2, the above-described vibration damping device 15 cannot fully function as a vibration damping device. Also, workability is poor.

  In Comparative Example 3, 135 parts by weight of silica is added to 100 parts by weight of the base rubber, and 35% by weight of a silane compound is added to the silica. In this case, although the addition amount of the silane compound was increased, the effect of increasing the silane compound was not obtained so much, the material cost increased, and it was not economical.

  In Comparative Example 4, 160 parts by weight of silica is added to 100 parts by weight of the base rubber, and 20% by weight of the silane compound is blended with respect to the silica. In this case, workability is poor and cannot be employed.

〔式中、Ｒ¹ 、Ｒ² 、Ｒ³ およびＲ⁴ のうちの少なくとも１つはアルコキシ基、またはハロゲン原子を示し、他は同一または異なって水素原子、アルキル基またはアリール基を示す。〕で表されるシラン化合物とを含有するゴム組成物の加硫成形により形成される。また、基材ゴムとしては、主鎖にＣ−Ｃ結合を有する種々のゴムがいずれも使用可能である。具体的には天然ゴム（ＮＲ）の他、イソプレンゴム（ＩＲ）、ブタジエンゴム（ＢＲ）、スチレン−ブタジエン共重合ゴム（ＳＢＲ）、エチレン−プロピレン共重合ゴム（ＥＰＭ）、アクリロニトリル−ブタジエン共重合ゴム（ＮＢＲ）、ブチルゴム（ＩＩＲ）などがあげられる。これらはそれぞれ単独で使用される他、２種以上を併用することもできる。 The silane compound is represented by the following general formula:

[Wherein, at least one of R ¹ , R ² , R ³ and R ⁴ represents an alkoxy group or a halogen atom, and the other represents the same or different and represents a hydrogen atom, an alkyl group or an aryl group. It is formed by vulcanization molding of a rubber composition containing a silane compound represented by the formula: Further, as the base rubber, any of various rubbers having a C—C bond in the main chain can be used. Specifically, in addition to natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene-butadiene copolymer rubber (SBR), ethylene-propylene copolymer rubber (EPM), acrylonitrile-butadiene copolymer rubber. (NBR), butyl rubber (IIR) and the like. These may be used alone or in combination of two or more.

In the silane compound represented by the general formula (1), examples of the alkoxy group corresponding to R ^{1 to} R ⁴ include those having various carbon numbers represented by C _n H _{2n + 1} O. Preferable examples include methoxy and ethoxy having 1 to 2 carbon atoms. Examples of the halogen atom include fluorine, chlorine, bromine and the like.

Examples of the alkyl group include those having various carbon numbers represented by C _n H _{2n + 1} , and the carbon number is particularly preferably about 1 to 20. Examples of such alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, secondary butyl, tertiary butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl and the like. can give.

  Examples of the aryl group include phenyl, tolyl, xylyl, biphenylyl, o-terphenyl, naphthyl, anthryl, phenanthryl and the like. Specific examples of such silane compounds include, but are not limited to, n-hexyltrimethoxysilane, triethoxyphenylsilane, diethoxydimethylsilane, dimethyldichlorosilane, methyldichlorosilane, and the like.

  In addition to the above, the rubber composition includes, for example, a vulcanizing agent, a vulcanization accelerator, a vulcanization acceleration aid, a vulcanization retarder, a reinforcing agent other than silica, a filler, a softening agent, a plasticizer, and a tackifier. In addition, various additives may be added. Among the above, examples of the vulcanizing agent include sulfur, organic sulfur-containing compounds, and organic peroxides. Among these, examples of the organic sulfur-containing compounds include N, N'-dithiobismorpholine and the like. Examples of the peroxide include benzoyl peroxide and dicumyl peroxide.

  Examples of the vulcanization accelerator include thiuram vulcanization accelerators such as tetramethylthiuram disulfide and tetramethylthiuram monosulfide; zinc dibutyldithiocarbamate, zinc diethyldithiocarbamate, sodium dimethyldithiocarbamate, diethyl Dithiocarbamates such as tellurium dithiocarbamate; thiazoles such as 2-mercaptobenzothiazole and N-cyclohexyl-2-benzothiazolesulfenamide; organics such as thioureas such as trimethylthiourea and N, N′-diethylthiourea Examples of the promoter include inorganic promoters such as slaked lime, magnesium oxide, titanium oxide, and risurge (PbO).

  Examples of the vulcanization acceleration aid include fatty acids such as stearic acid, oleic acid and cottonseed fatty acid, and metal oxides such as zinc white. Examples of the vulcanization retarder include aromatic organic acids such as salicylic acid, phthalic anhydride, and benzoic acid; N-nitrosodiphenylamine, N-nitroso-2,2,4-trimethyl-1,2-dihydroquinone, N-nitroso And nitroso compounds such as phenyl-β-naphthylamine.

  The total amount of the vulcanizing agent, vulcanization accelerator, vulcanization acceleration aid and vulcanization retarder is preferably about 4 to 15 parts by weight with respect to 100 parts by weight of the base rubber. . Examples of the antioxidant include imidazoles such as 2-mercaptobenzimidazole; phenyl-α-naphthylamine, N, N′-di-β-naphthyl-p-phenylenediamine, N-phenyl-N′-isopropyl-p- Examples include amines such as phenylenediamine; phenols such as di-t-butyl-p-cresol and styrenated phenol.

  The blending amount of the antioxidant is preferably about 1.5 to 5 parts by weight with respect to 100 parts by weight of the base rubber. Carbon black is mainly used as a reinforcing agent other than silica, inorganic reinforcing agents such as silicate-based white carbon, zinc white, surface-treated precipitated calcium carbonate, magnesium carbonate, talc, clay, or coumarone. -Organic reinforcing agents such as indene resin, phenol resin, and high styrene resin (styrene-butadiene copolymer having a high styrene content) can also be used.

  Examples of the filler include calcium carbonate, clay, barium sulfate, and diatomaceous earth. The blending amount of the reinforcing agent and / or filler other than silica is preferably about 5 to 50 parts by weight with respect to 100 parts by weight of the base rubber. Examples of the softener include vegetable oil-based, mineral oil-based, and synthetic softeners such as fatty acids (stearic acid, lauric acid, etc.), cottonseed oil, tall oil, asphalt substances, and paraffin wax.

  The blending amount of the softening agent is preferably about 10 to 100 parts by weight with respect to 100 parts by weight of the base rubber. Examples of the plasticizer include various plasticizers such as dibutyl phthalate, dioctyl phthalate, and tricresyl phosphate. As for the compounding quantity of a plasticizer, about 5-20 weight part is preferable with respect to 100 weight part of base rubber.

  Further, examples of the tackifier include coumarone / indene resin, aromatic resin, aromatic / aliphatic mixed resin, rosin resin, and cyclopentadiene resin. The compounding amount of the tackifier is preferably about 5 to 50 parts by weight with respect to 100 parts by weight of the base rubber.

  In addition to the above, for example, a dispersant, a solvent and the like may be appropriately blended in the rubber composition. The rubber composition is produced by kneading the above components using, for example, a closed kneader. The viscoelastic body is formed, for example, by molding the rubber composition into a sheet using a roller head extruder, punching out the sheet so as to have a predetermined shape, and then cutting the punched sheet into a predetermined thickness. In a state where a plurality of sheets are laminated so as to have, they are manufactured by heating in a predetermined mold and performing vulcanization molding.

  As mentioned above, although the damping cabinet concerning one embodiment of the present invention was explained, the damping cabinet concerning the present invention is not limited to the above-mentioned embodiment.

  In the above-described vibration control cabinet, the vibration control device is not limited to the above-described form, and the shape and the like of each member may be changed as appropriate.

  For example, in the above-described embodiment, as shown in FIGS. 3 (a) and 3 (b), the vibration damping unit 30 has the sliding support members 38 and 39 disposed on both sides of the intermediate plate 35, and the viscoelastic bodies 31 and 32. The structure which comprised integrally the site | part which functions as the damping device 15 provided with and the sliding bearing devices 36 and 37 was illustrated. The vibration control cabinet according to the present invention is not limited to this embodiment. For example, the part functioning as the vibration damping device 15 is an example in which one intermediate plate 35 and two viscoelastic bodies 31 and 32 are stacked. However, the number of stacked viscoelastic bodies 31 and 32 and the intermediate plates 35 is as follows. It is not limited to this. The number of layers may be three or five or more. In addition, the attachment plates 36 and 37 are fixed to both sides in the stacking direction of the laminate 40 and are attached to the fixing plates 33 and 34 with the attachment plates interposed therebetween. However, as shown in FIG. The bodies 31 and 32 may be directly fixed to the fixing plates 33 and 34.

Further, as shown in FIG. 11, rolling bearing devices 46 and 47 may be used instead of the sliding bearing devices 36 and 37. In the reference example shown in FIG. 12, a damping device 53 constructed in the viscoelastic body 51 and the plate 52 constitute a sliding bearing device 54 separately. In the reference example shown in FIG. 12, the sliding support device 54 for supporting the inner cabinet 12 is provided and the vibration control device 53 is provided in the vicinity thereof. However, as shown in FIG. Alternatively, the rolling bearing device 55 may be used.

The perspective view which shows the cabinet which accommodates an electronic device etc. FIG. The front view of the vibration suppression cabinet which concerns on one Embodiment of this invention. (A) is the figure which expanded A in FIG. 2, (b) is the figure which expanded B in FIG. The figure which shows the damping device of the damping cabinet which concerns on one Embodiment of this invention. The top view which shows the state which the vibration acted on the damping device of the damping cabinet which concerns on one Embodiment of this invention. The top view which shows the state which the vibration acted about the damping device of the damping cabinet which concerns on one Embodiment of this invention, when there is no sliding support apparatus. The figure explaining the shear strain rate (gamma). The figure which showed the method of calculating an equivalent viscous damping constant from a hysteresis curve measurement result. The figure which shows evaluation of the viscoelastic body used for the damping device which concerns on one Embodiment of this invention. The figure which shows the sliding support apparatus and damping device of the damping cabinet which concern on other embodiment of this invention. The figure which shows the rolling support apparatus and damping device of the damping cabinet which concern on other embodiment of this invention. The figure which shows the sliding support device and damping device of the damping cabinet which concern on a reference example . The figure which shows the rolling support apparatus and damping device of the damping cabinet which concerns on another reference example .

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Damping cabinet 11 Outer cabinet 12 Inner cabinet 13, 14 Sliding support device 15 Damping device 21 Floor material 22 Column material 23 Ceiling material 24, 25 Side surface 26 Lower plate material 27 Column material 28 Upper plate material 30 Damping unit 31, 32 Elastic body 33, 34 Fixing plate 35 Intermediate plate 36 First mounting plate 37 Second mounting plate 38, 39 Sliding bearing member 40 Laminated body 41, 42 Mounting hole 51 Viscoelastic body 52 Plate 53 Damping device 54 Sliding bearing device 55 Rolling bearing device

Claims (2)

Comprising an outer cabinet, an inner cabinet disposed in the inside of the outer cabinet, and a damping unit disposed between the inner cabinet and the outer cabinet,
The vibration control unit is composed of a vibration control device and a sliding support device or a rolling support device,
The vibration damping device, a laminate obtained by laminating a viscoelastic member and the intermediate plate are alternately Attach between a pair of plates, one of said pair of plates, fixed to one plate in said cabinet, the other a is a plate which is fixed to the flooring or ceiling material of the outer cabinet,
The sliding bearing device or the rolling bearing device is mounted on each of the extended portions of the intermediate plate extending from the viscoelastic body, supports the inner cabinet, and slides or rolls with respect to the pair of plates. It is equipped with movable sliding bearing material or rolling bearing material,
100 to 150 parts by weight of silica is added to 100 parts by weight of the base rubber having a C—C bond in the main chain of the viscoelastic body of the vibration damping device , and 10 to 30 silane compounds are added to the silica. damping cabinet, characterized in that is obtained by wt% blended. A damping unit disposed between an outer cabinet of the cabinet and an inner cabinet disposed inside the outer cabinet,
Consists of vibration control device and sliding support device or rolling support device,
The vibration damping device is a laminate in which a viscoelastic body and an intermediate plate are alternately laminated, and is attached between a pair of plates.
The sliding bearing device or the rolling bearing device is mounted on each of the extended portions of the intermediate plate extending from the viscoelastic body, supports the inner cabinet, and slides or rolls with respect to the pair of plates. It is equipped with movable sliding bearing material or rolling bearing material,
100 to 150 parts by weight of silica is added to 100 parts by weight of the base rubber having a C—C bond in the main chain of the viscoelastic body of the vibration damping device, and 10 to 30 silane compounds are added to the silica. A vibration control unit characterized by blending in weight percent .

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