JP2000291710A - Laminated rubber damper and method of manufacturing the same - Google Patents

Abstract

(57) [Problem] To provide a laminated rubber damper with high thickness accuracy of a viscoelastic sheet, extremely uniform physical properties inside a laminated rubber damper, and excellent shear characteristics, and a simple series of manufacturing steps.
It is possible to manufacture uniform laminated rubber damper products with high performance accuracy, there is no variation in performance between products, and it is easy to respond to the diversification of laminated rubber dampers and it is possible to increase the design flexibility Provision of manufacturing method. In a laminated rubber damper having a long laminated portion in which a plurality of steel plates and a viscoelastic sheet are laminated, the laminated portion alternately laminates a plurality of steel plates and a viscoelastic sheet, and forms a cold-curable adhesive. Laminated rubber damper characterized by being bonded through, and its manufacturing method,
Solution to the Problems

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a laminated rubber damper and a method of manufacturing the same.

[0002]

2. Description of the Related Art Hitherto, in a middle and high-rise building, a building frame using a brace structure has been widely used in order to attenuate vibration energy due to a horizontal force such as an earthquake or wind. In recent years, a method of attenuating vibration energy by incorporating a laminated rubber damper utilizing a characteristic of a viscoelastic body, which is a sandwich structure laminated with a viscoelastic body and a steel plate in a brace structure, is used. It has become When the viscoelastic body is deformed, the laminated rubber damper converts vibration energy into heat energy, dissipates the energy, and obtains a vibration damping effect. In the conventional method of manufacturing a laminated rubber damper, a laminated body in which an unvulcanized rubber sheet and a steel sheet coated with a vulcanizing adhesive are laminated is incorporated into a large mold, and a vulcanizing press (curing equipment) is used for a long time. And vulcanization, and the vulcanization reaction of rubber and the adhesion reaction of rubber / metal are simultaneously performed. With such a manufacturing method, the volume of the mold is large and the heat conduction in the rubber is deteriorated, and a large temperature distribution is generated in the laminate during vulcanization, and the physical distribution inside the resultant laminated rubber damper has a physical distribution. Arises
There is a problem that the dispersion of performance is large for each obtained laminated rubber damper. In addition, since the upper and lower layers of the vulcanizing press are pressurized and heated by the hot plates, the rubber of the uppermost layer and the lowermost layer of the laminate is softened and flows first, and the thickness is reduced. Therefore, there is a problem that the shearing performance of the obtained laminated rubber damper at the time of large deformation is reduced. Furthermore, complicated and large-sized molds are required to match the shape of the laminated rubber damper, and large-sized molds are expensive and therefore costly to manufacture. Equipment (press) was required.
It was difficult to cope with the diversification of products due to the increase in molds.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a laminated rubber damper in which the thickness accuracy of the viscoelastic sheet is high, the physical properties inside the laminated rubber damper are extremely uniform, and the shear characteristics are excellent, and a series of manufacturing steps. It is easy to manufacture, it is possible to manufacture uniform laminated rubber damper products with high performance accuracy, there is no variation in performance between products, and it is easy to respond to diversification of laminated rubber dampers and it is possible to increase design flexibility An object of the present invention is to provide a method for manufacturing a laminated rubber damper.

[0004]

That is, the present invention provides a bracket for fixing to a beam-column frame at both ends of a long object including a long laminated portion in which a plurality of steel plates and a viscoelastic sheet are laminated. A laminated rubber damper having a laminated rubber damper, wherein the laminated portion alternately laminates a plurality of steel plates and a viscoelastic sheet and is bonded via a cold-setting adhesive.

Further, the present invention provides a laminated rubber damper having brackets for fixing to a beam-column frame at both ends of a long object including a long laminated portion in which a plurality of steel plates and viscoelastic sheets are alternately laminated. The present invention provides a method for producing a laminated rubber damper, characterized in that the steel sheet and the viscoelastic sheet are laminated and adhered to each other via a cold-setting adhesive.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a laminated rubber damper of the present invention and a method of manufacturing the same will be described in detail based on preferred embodiments shown in the drawings.

[0007] Generally, a laminated rubber damper is a laminated body of rubber and a steel plate provided between layers of a frame of a building in order to impart seismic resistance to a middle or high-rise building. This is a building member in which a steel plate or the like is used as a stabilizer, and a rubber sheet and a rubber sheet are firmly laminated. Various shapes and structures can be considered depending on the size and shape of the building to be constructed, construction site,
There is no particular limitation. FIG. 2 is a front view showing a brace structure using a preferred example of a laminated rubber damper (hereinafter, referred to as a damper) 40. In this example, the damper 40 is
Brackets 11 and 12 are welded to both ends in the longitudinal direction. The damper 40 is provided in a plane surrounded by the pillar 31 and the beam 32,
Gusset plate 33 attached to pillar 31 or beam 32
The brackets 11 and 12 are fixed and attached with high strength bolts and nuts (bolts and nuts) 22. Note that FIG.
In the example shown in (1), the damper 40 is fixed by the high-strength bolt / nut 22, but the fixing means may be a means such as a clamp. In the example shown in FIG.
The gusset plate 33 is provided near the center of the beam 32 and the column 31.
Is installed near the intersection of the beam 31 and the beam 32.
It is installed near two intersections that are not adjacent to each other, and the damper 4
0 may be set on a diagonal line. By attaching the damper 40 in this manner, the component force in the direction of the damper 40 of the stress such as the earthquake or wind transmitted to the beams of the building is attenuated, and as a result, the vibration energy due to the stress applied to the building is attenuated. In addition, the damper 40 can be externally attached to an existing building, and can be attached when earthquake-resistant reinforcement is required.

[0008] The laminated rubber damper of the present invention is a long laminate in which a plurality of steel plates and a viscoelastic sheet are laminated. The laminated rubber damper of the present invention preferably has a structure having brackets at both ends of the laminated body for fixing the columnar frame. The laminated rubber damper according to the present invention is characterized in that the laminated body is formed by alternately laminating a steel plate and a viscoelastic sheet, and is bonded via a cold-setting adhesive. FIG. 3 is a plan view of one preferred embodiment of the damper 40 shown in FIG. The structure of the damper 40 will be further described based on a preferred embodiment shown in FIG. In the damper 40 exemplified in this preferred embodiment, a long object composed of a laminated portion 25 in which a steel plate and a viscoelastic sheet are laminated is fixed between the brackets 11 and 12. Bracket 1
Spaces 23, 1 and 12 are provided between
24 are provided. The bracket 11 includes a laminated portion 25.
A flat surface 13 formed integrally with the steel plate 1 extending from the laminated portion 25 provided at the center of the flat surface, and a flat surface 14 fixed at a right angle thereto. Both surfaces of the outermost layer of the laminated portion 25 are covered with end steel plates 8 and 9, and these planes are formed by spacers 17, 1, 1 according to the number of laminated layers 25.
8 and is fixed to the flat surface 13 of the bracket 11 by bolts and nuts 21. The space between the spacers 17 and 18 and the laminated portion 25 surrounded by the end steel plates 8 and 9 and the steel plate 1 is the aforementioned space 23. Steel plate 1 at the center of the laminated portion 25
Are laminated and adhered to the viscoelastic sheets 4 and 5 via a room temperature curing adhesive. Further, the viscoelastic sheets 4 and 5 are laminated and bonded to the steel plates 2 and 3 and the steel plates 2 and 3 to the viscoelastic sheets 6 and 7 via a room-temperature-curable adhesive. Further, the viscoelastic sheets 6 and 7 may be laminated and adhered to the end steel plates 8 and 9 via a cold-setting adhesive, or simply the end steel plates 8 and 9 may be attached to both surfaces of the laminated portion 25. It may be fixed with bolts and nuts. The thickness of the steel sheet 1 at a portion integrated with the plane 13 is about three times as thick as the thickness of the steel sheet 1 in the laminated portion 25. Since this portion is a portion for joining the damper 40 to the beam-column frame, it is to secure a sufficiently large structural strength. On the thickened flat surface 13 of the steel plate 1, the end steel plates 8, 9 are provided with spacers 17, 1.
8 and is fixed by bolts and nuts 21. The steel plates 2 and 3 extend from the end of the laminated portion 25 opposite to the bracket 11, and the ends of the steel plates 2 and 3 are fixed to the bracket 12 via spacers 19 and 20 by bolts and nuts 21. The bracket 12 includes a flat surface 15 for fixing the steel plates 2 and 3 and a flat surface 16 fixed at a right angle thereto. A space 24 is provided between the laminated portion 25 and the bracket 12. This space 24 and the above-mentioned space 23 are both provided to allow shear deformation of the central steel plate 1 and the other steel plates 2 and 3 and the viscoelastic sheets 4, 5, 6 and 7 of the laminated portion 25. ing. Thus, the laminated portion 2
The steel plates 1, 2 and 3 of No. 5 alternately extend from the laminated portion 25 to different sides, respectively, are fixed to the brackets 11 and 12, and vibrate according to the movement of each of the brackets 11 and 12, thereby effectively. Vibration energy is transmitted to the viscoelastic sheets 4 to 7 to absorb and dissipate the vibration energy.

FIG. 1 is an enlarged view of a laminated portion of the laminated rubber damper of FIG. 2 between the steel plates 1 to 3 and the viscoelastic sheets 4 to 7. The damper of the present invention is obtained by alternately laminating a steel plate and a viscoelastic sheet and bonding them through a room temperature curing adhesive 10. In the example of FIG. 1, the steel plates 1 to 3 and the viscoelastic sheet 4 to
The end steel plates 8, 9 are bonded and laminated to the two outermost viscoelastic sheets 6, 7 of the laminated portion of the damper 40 via the room-temperature curing adhesive 10, respectively. The laminated portion of the damper 40 is characterized in that the steel plates 1 to 3 and the viscoelastic sheets 4 to 7 are bonded via the cold-setting adhesive 10. The bonding surfaces of the steel plates 1 to 3 and the viscoelastic sheets 4 to 7 may be subjected to physical and chemical surface treatments and then bonded via the cold-setting adhesive 10. Steel plate 1
3 and the viscoelastic sheets 4 to 7 are securely bonded by the cold-setting adhesive 10, so that earthquakes and winds input to the building are transmitted to the viscoelastic sheets 4 to 7 through the steel plates 1 to 3. Vibration energy of viscoelastic sheets 4-7
Is converted into heat energy by the shearing deformation of the steel, thereby obtaining a stable vibration damping effect. The thickness and size of the steel plates 1 to 3 and the viscoelastic sheets 4 to 7 are the same as those of the damper 4.
0 is appropriately determined according to the application to which it is applied, and is not particularly limited. Also, as the damper, FIG.
As in the preferred embodiment shown in FIG. 1, the steel plate may include a steel plate 1 provided at the center of the laminated portion and steel plates 2 and 3, and the number thereof is not limited to one and two, respectively. For example, the number can be set to an arbitrary number such as 2 and 3 respectively. By inserting a plurality of steel plates, the vibration damping characteristics of the damper 40 can be set arbitrarily.

The steel plates 1 to 3 are used as stabilizers in the damper 40, and various conventionally known steel plates can be used.
Although not particularly limited, for example, a general structural steel sheet, a cold-rolled steel sheet and the like can be mentioned.

The viscoelastic sheets 4 to 7 are not particularly limited as long as they exhibit viscoelasticity. Known compositions having high damping properties together with viscoelasticity, for example, vulcanized rubber, unvulcanized rubber, Either a thermoplastic elastomer or a thermosetting elastomer may be used. Examples of the unvulcanized rubber used as a raw material for the vulcanized rubber include natural rubber (NR), isoprene rubber (IR), and styrene / butadiene copolymer rubber (SB).
R), natural rubber / styrene-butadiene copolymer rubber (NR / SBR), natural rubber / butadiene rubber (NR
/ BR) type, natural rubber / acrylonitrile butadiene rubber (NR / NBR) type and the like are preferably exemplified. Various additives such as a filler, a plasticizer, an antioxidant, a vulcanizing agent, a vulcanization accelerator, and a vulcanization aid can be added to the unvulcanized rubber, if necessary. Examples of fillers include carbon blacks such as HAF carbon and SAF carbon, etc., examples of plasticizers include aroma oils and waxes, examples of vulcanizing agents include sulfur and zinc white, and examples of vulcanization accelerators include N and N. -Cyclohexyl-2-benzothiazolesulfenamide (CBS), dibenzothiazyldisulfide (DM) and the like, and as a vulcanization aid, stearic acid and the like.
In addition, even if it is not vulcanized and is not vulcanized, it can be used as long as it has shear characteristics satisfying the required characteristics of having high damping properties together with viscoelasticity.

On the other hand, examples of the thermoplastic elastomer include ester-based, amide-based, urethane-based, styrene-based, olefin-based and vinyl chloride-based elastomers, and elastomers in which rubber is dispersed therein.

The cold-setting adhesive 10 may be a one-part type or a two-part type, but may be a phenolic adhesive, a urethane adhesive, a modified silicone adhesive, a rubber adhesive, a cyanoacrylate adhesive, or an epoxy. System adhesives. The type of the adhesive to be used may be appropriately determined according to the type of the viscoelastic sheet and the steel plate to be used, the required adhesive strength, and the like. It is preferred that
These may be used alone or in combination of two or more.

Examples of the phenolic adhesive include a vinyl phenolic type, an epoxy phenolic type, and a nitrile phenolic type, and are used in combination with other adhesives. The urethane-based adhesive is based on a prepolymer containing polyisocyanate and polyether or polyester polyol as main raw materials, and blends fillers such as calcium carbonate and carbon black with additives such as tertiary amine and tin catalyst. It may be used. Further, as the polyol, an epoxy-modified product, a rubber-modified product, a product obtained by adding a hydroxyl group to the end or inside of rubber, a phenol resin, etc. are also preferably used for improving the adhesion.

The modified silicone-based adhesive is a polymer in which the terminal of a polyol is alkoxysilylated, and MS polymer manufactured by Kaneka Chemical Industry is generally preferably used.
As described above, fillers, additives such as catalysts are blended,
It is preferable to use a modified polyol. Rubber adhesives include chlorinated natural rubber, chloroprene,
Solution type to which rubber such as polybutadiene, low-temperature curing agent such as tetramethylthiuram disulfide (TT) and tetramethylthiuram monosulfide (TS), phenol resin, resol resin, and if necessary, isocyanate May be used. It is preferable to add carbon black, titanium, calcium carbonate, or the like as a filler.

The cyanoacrylate-based adhesive is a so-called instant adhesive, which may be based on 2-cyanoacrylate or a derivative thereof commercially available from Toa Gosei Chemical Co., Ltd. However, it is preferable to use them together with others. Epoxy adhesives include epoxy resins of glycidyl ether type, glycidyl ester type, glycidylamine type, alicyclic type, etc., and curing agents such as polyamideamine, polythiol, acid anhydride, catalysts, fillers, etc. It may be used. Epoxy resin is modified to phenol novolak type or ortho-cresol novolak type, or rubber modified,
As the amine curing agent, a rubber-modified one is used if necessary. These adhesives may be used alone or in combination depending on the type of the viscoelastic sheet to be adhered.

An example of a method for manufacturing a laminated rubber damper of the present invention will be described using the laminated portion of the damper 40 in the illustrated example described above. First, an appropriate additive is added to the unvulcanized rubber, kneaded, rolled to a predetermined thickness, and then punched into a predetermined shape to obtain an unvulcanized rubber sheet, which is vulcanized by heating and vulcanization. Viscoelastic sheets 4 to 7 made of vulcanized rubber are formed. On the other hand, the steel plates 1 to 3 are degreased after surface treatment by sandblasting. The cold-setting adhesive 10 is applied to both surfaces of the steel sheet 1, the viscoelastic sheets 4 and 5 are respectively laminated, and the steel sheets 2 and 3 further coated with the cold-setting adhesive 10
Are laminated. Room temperature curing adhesive 10 on the surfaces of steel plates 2 and 3
Is further applied, and the viscoelastic sheets 6 and 7 are respectively laminated. In this way, a laminated portion of the damper 40 is produced by alternately laminating a plurality of steel plates and the viscoelastic sheet. The bonding surfaces of the steel plates 1 to 3 with the viscoelastic sheets 4 to 7 are previously subjected to a mechanical treatment such as a buffing treatment, a chemical treatment such as a chlorination treatment or an oxidation treatment, or a mechanical treatment such as providing a step or unevenness. May be applied. Further, a primer may be applied. Since it has such an adhesive surface,
The viscoelastic sheet 3 and the viscoelastic sheets 4 to 7 can be laminated with a high adhesive force via the cold-setting adhesive 10 and are preferable. For example, as a buffing treatment, the surface of rubber or a hard plate is roughened by a polishing machine or the like, and as a chlorination treatment, by chlorinating the rubber with a solution of sodium hypochlorite and hydrochloric acid,
The oxidation treatment is performed by plasma treatment, UV treatment, or corona discharge treatment, but is not limited to these methods. Note that a plurality of these processes and steps may be used in combination. The steel plates are stacked so that they alternately project to different sides.
The bracket 11 is fixed to the protruding end of the central steel plate 1 by a method such as welding. Alternatively, the bracket 11
The laminated portion may be manufactured by the above method using the steel sheet 1 to which the above is fixed. Spacers 17, 18 are sandwiched between the end steel plates 8, 9 and the steel plate 1, and the end steel plates 8, 9 are fixed to the steel plate 1 by bolts and nuts 21 and integrated with the bracket 11. On the other hand, the spacers 19 and 20 are sandwiched between the steel plates 2 and 3 and the protruding flat surface 15 of the bracket 12, and the steel plates 2 and 3 and the bracket 12 are fixed by bolts and nuts 21. Damper 4 not covered by end steel plates 8 and 9
A steel plate is fixed to each of two longitudinal side surfaces of the laminated portion No. 0 with bolts and nuts to form a case.

According to the present invention, the bonding between the viscoelastic sheet and the viscoelastic sheet is performed using a cold-setting adhesive, so that it is not necessary to laminate and vulcanize the viscoelastic sheet and the steel sheet. Vulcanization or molding can be performed in units. For this reason, the vulcanization or molding process is short. Further, since the heat conduction inside the viscoelastic sheet is good, the temperature distribution becomes uniform, and the viscoelastic sheet obtained in this manner is used, so that a laminated rubber damper having substantially uniform internal physical properties can be manufactured, and the obtained laminated rubber damper can be manufactured. There is no variation in product performance between products. In particular, the thickness accuracy of the viscoelastic sheet can be increased, and a laminated rubber damper having high vibration energy absorption performance during large deformation can be manufactured. Further, it is possible to manufacture a laminated rubber damper without requiring a large-sized mold (die) corresponding to the final shape of the laminated rubber damper product. There is no need for a large vulcanizing press to fit a large mold. At the time of the final assembly of the laminated rubber damper, the time required for the final assembly can be shortened by bonding the steel plate and the viscoelastic sheet using a cold-setting adhesive. Therefore, a series of manufacturing steps is simple. In the past, individual molds were required to manufacture laminated rubber dampers of various shapes and sizes in accordance with the structure and required characteristics of buildings and bridges. Such a mold is not required, it is easy to cope with diversification of laminated rubber dampers, and the design flexibility is high. Further, since a laminated rubber damper having high thickness accuracy can be easily manufactured, it is possible to design a product in which the performance of the final product is almost certainly predicted. According to the method of manufacturing a laminated rubber damper of the present invention, the frequency of producing a product that does not meet a predetermined standard of the laminated rubber damper is extremely low, and the production cost can be suppressed.

Since the laminated rubber damper of the present invention does not go through a vulcanizing step by heating under pressure after laminating the viscoelastic sheet and the steel sheet, the outermost viscoelastic sheet is softened by heating during vulcanization. The layer thickness of the viscoelastic sheet does not become thinner due to erosion, so that the inner layer and the outermost layer have the same layer thickness, and the thickness accuracy of the viscoelastic sheet is high.
In addition, since the viscoelastic sheet preparation and the bonding to the steel plate are performed in separate steps, the physical properties inside the laminated rubber damper are extremely uniform, the shear properties are excellent, and a stable vibration damping effect is exhibited. In addition, since the vulcanization step is not required, there is no need to limit the size of the damper to a size that can be sufficiently heated, and the thickness of the viscoelastic sheet can be made thicker than that of the conventional rubber damper, resulting in a higher damping effect. Can be obtained. Therefore, such a laminated rubber damper of the present invention
It can be suitably used for brace structures and the like of middle and high-rise buildings.

[0020]

The present invention will be described more specifically with reference to the following examples. Example 1 An unvulcanized rubber sheet having a high damping property was kneaded, rolled, and then punched into a predetermined shape to obtain an unvulcanized rubber sheet under the conditions of 2 MPa, 130 ° C. × 120 minutes. By vulcanizing, a vulcanized rubber sheet (10 mm thick)
× 10 cm square). Steel plate (3.2 mm × 10 cm square) 5 which has been subjected to surface treatment by degreasing and sand blasting and coated with an epoxy adhesive of a room temperature curing type.
And a vulcanized rubber sheet were alternately laminated to produce a laminated portion of a laminated rubber damper.

Comparative Example 1 Five steel sheets (3.2 mm × 10 cm square) coated with a vulcanizing adhesive, which had been subjected to surface treatment by degreasing and sandblasting, and four unvulcanized rubber sheets having a high damping composition Were alternately laminated and vulcanized under the conditions of 130 ° C. × 720 minutes to produce a laminated portion of a laminated rubber damper.

(Evaluation) The thickness of the vulcanized rubber between the steel plates in the laminated portions of the laminated rubber dampers produced in the examples and comparative examples was measured.
Compared. As a result, it was confirmed that the variation of the rubber layer thickness of each layer of the laminated rubber damper of the present invention obtained in Example 1 was small and good as shown in Table 1. In the laminated rubber damper of the conventional manufacturing method obtained in Comparative Example 1, Table 1
As shown in FIG. 5, it was confirmed that the variation was large, and the thickness of the upper and lower first and fourth layers was particularly notable.

[0023]

[0024]

According to the present invention, it is possible to manufacture a laminated rubber damper without the need for a large mold (die) or a large vulcanizing press according to the shape of the laminated rubber damper. Therefore, a series of manufacturing steps is extremely simple. Since a large mold is not required, it is easy to cope with diversification of laminated rubber dampers, and the degree of design freedom is high. Further, the performance accuracy between the laminated rubber dampers obtained by the present invention is extremely uniform, and there is no variation in the performance due to the laminated rubber dampers.

Further, such a laminated rubber damper has the following features.
The viscoelastic sheet has a uniform thickness and high accuracy, and has uniform internal physical properties, and exhibits excellent shear characteristics and vibration damping effect by absorbing vibration energy. Therefore, the laminated rubber damper of the present invention is suitable for a brace frame or the like of a middle or high-rise building.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a laminated rubber damper of the present invention.

FIG. 2 is a front view showing an example of a brace structure using an embodiment provided with a case and a bracket of the laminated rubber damper of the present invention.

FIG. 3 shows a laminated rubber damper 1 according to the present invention shown in FIG.
It is a top view of an example.

[Explanation of symbols]

 1-3 Steel plate 4-7 Viscoelastic sheet 8, 9 End steel plate 10 Cold curing adhesive 11, 12 Bracket 13-16 Plane 17-20 Spacer 21 Bolt / nut (bolt and nut) 22 High strength bolt / nut ( Bolt and nut) 23, 24 Space 25 Laminated part 31 Column 32 Beam 33 Gusset plate 40 Damper

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 3J048 AA02 AC05 BA17 BD07 BD08 EA38 3J066 AA01 AA26 BA10 BB04 BD10 BE06 4F100 AB03A AB03C AB03E AK01B AK01D AK01E AK53G AN00 BA08 BA10A BA10E EJ06 J07 J07 GB07

Claims (2)

[Claims] 1. A laminated rubber damper having a long laminated portion in which a plurality of steel plates and a visco-elastic sheet are laminated, wherein the laminated portion alternately laminates a plurality of steel plates and a visco-elastic sheet, and a room temperature curing adhesive. A laminated rubber damper characterized by being adhered through a rubber. 2. A method of manufacturing a laminated rubber damper having a long laminated portion in which a plurality of steel sheets and a viscoelastic sheet are alternately laminated, wherein the steel sheet and the viscoelastic sheet are bonded via a room temperature curing adhesive. A method for manufacturing a laminated rubber damper, wherein the laminated rubber damper is laminated and bonded together.