JP3420117B2 - slider - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slider used in a seismic isolation system or the like, and more particularly to a slider which is resistant to deterioration over time and has high durability.

[0002]

2. Description of the Related Art Conventionally, in order to protect a building from an earthquake, a composite laminated body in which a plurality of rigid hard plates such as steel plates and soft plates such as rubber having viscoelastic properties are alternately laminated A seismic isolation structure is used as a component. By supporting the building with the composite laminate used here, the natural frequency of the building is made longer and the resonance with the seismic wave is prevented, resulting in a large amplitude but slow vibration. As a result, seismic isolation systems that apply a method that converges in a short time are generally used. Examples of the dampers that are installed side by side include metal rigid bar dampers, friction dampers, viscous dampers, and the like. As one of such dampers, there is a slider-type friction damper (hereinafter referred to as slider) that utilizes a frictional force generated between two friction plates.

The seismic isolation structure used for wooden houses, lightweight devices, machines, etc., has a very light skeleton, and the load carried by the composite laminate is generally 30 kg / cm ² or less. Yes, this requires a soft composite laminate, which is not only difficult to manufacture,
When this is used, a structure having a small weight and a large area causes a problem that it is greatly shaken by a strong wind. In addition, the slider has a problem in that when a phenomenon (negative pressure) occurs such that part of the body is lifted due to rocking during an earthquake, the two friction plates are separated vertically and the friction force becomes zero. A seismic isolation system that combines a slider and a composite laminate is preferably used.

Such a slider is composed of a support body having a pair of friction plates opposed to each other, which slide against each other to damp vibrations, one of which is fixed to a foundation portion such as ground and the other of which is a structure body. It is used by fixing it to the supporting substrate.
At this time, a wide area flat plate friction plate is arranged on the foundation side, and a columnar support having a narrower area friction plate at the tip is arranged on the upper structure side and the friction plate is arranged downward in the direction of gravity, Those having a structure in which the friction plates are in contact with each other are preferably used from the viewpoint of the stability of the load bearing points during an earthquake.

In order to stabilize the contact surface, a cushion rubber is arranged to absorb a slight deviation in parallelism between the upper and lower surfaces. In the case of such a structure, in order to attach the friction plate and the cushion rubber to the upper side, it is necessary to fix them to the flange in advance, which causes a problem in terms of work and cost.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a slider that can be easily attached to the upper structure.

[0007]

SUMMARY OF THE INVENTION The inventors of the present invention have adhered a support and a cushion of a friction plate, which is arranged downward in the direction of gravity, of a slider to an upper structural member by using a rimmed guide. The present invention has been completed with the finding that it can be easily attached without the need.

That is, the slider of the present invention has a pair of support members attached to the respective members in order to damp the vibration between the two members, and the sliders fixed to the tips of the support members and slidingly vibrating. A support having a pair of friction plates opposed to each other and having different areas, the support being arranged in the upper structural member so that the friction plate is located below the gravity direction in the upper structural member. It is characterized in that it is held by a fixed flange.

In the slider of the present invention, the friction plate is
It is formed by a resin coating having a thickness of 10 to 100 μm formed on the tip of the support, and the resin coating contains a polytetrafluoroethylene resin and a polyamideimide resin, and a polytetrafluoroethylene resin and a polyamideimide resin. The ratio is preferably 0.5: 9.5 to 3: 7.

The coefficient of dynamic friction on the surface of the friction plate of the slider of the present invention is as follows: temperature 15 ° C., surface pressure 120 kg / c.
m ² and sliding speed of 30 cm / sec under the measurement conditions of 0.
It is preferable that it is from 03 to 0.06 in terms of attenuation characteristics.

In the present invention, the two members to which the slider is fixed are, if it is a building, the ground and the structure, or if it is a structure such as a supporting substrate, a machine, or an apparatus thereof, a building for arranging it. It refers to the foundation such as the floor of the body or the laboratory table, its structure, or the support substrate fixed to it and supporting it.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. FIG. 1 is a schematic cross-sectional view showing one mode of a slider that can be used in the present invention.

The slider 10 has a first support 14 attached to a ground (foundation) 12 on which a structure is arranged.
And a second attached to the construct or its supporting substrate 16
Of the friction plates 20, 22 on the contact surfaces of the upper end of the first support 14 and the lower end of the second support 18, respectively.
Are formed. The slider 10 is configured to be freely displaceable in the lateral direction only when a lateral force of a predetermined value or more is input between the first support body and the second support body. First, at the contact surfaces of the tips of the first support and the second support, the vibration is damped by utilizing the frictional contact between the friction plates arranged on the respective surfaces.

In this case, the coefficient of dynamic friction on the surface of the friction plate of the slider is particularly important, and the temperature is 15 ° C. and the surface pressure is 120 kg.
/ Cm ² and sliding speed of 30 cm / sec under measurement conditions, preferably 0.03 to 0.06, more preferably 0.03 to 0.05, and most preferably 0.04 to 0.0.
It is 5. If the coefficient of friction exceeds 0.06, the frictional force becomes too large and smooth deformation does not occur. If the friction coefficient is less than 0.03, sufficient damping cannot be obtained and the object cannot be achieved.

As a material which can be used for the surface of the friction plate disposed on the surface where both supports come into contact with each other, for example, a fluororesin and a thermoplastic resin or a fluororesin on the surface of a base such as a metal plate or a ceramic plate. It is effective to apply a mixture of a resin and a thermosetting resin and bake it to form a resin film.

In order to easily adjust the friction coefficient of the surface of the friction plate, it is preferable that the friction plate is made of resin. From the viewpoint of workability and strength, a resin coating is formed on the tip of a metal support having a desired shape. It is a particularly preferred embodiment to form a friction plate.

When the friction plate is formed of a resin coating, the thickness of the resin coating formed on the tip of the support is 10 to 100 μm.
It is preferably in the range of m. If the thickness is less than 10 μm, the adhesion between the metal support and the resin coating is poor, and it is difficult to obtain practical coating strength. If the thickness exceeds 100 μm,
The productivity is lowered and it is not practical, and neither is preferable.

Structurally, the friction plates may be in contact with each other, but one support (second support in FIG. 1) has a columnar shape as shown in FIG.
The other support (the first support in FIG. 1) is a flat plate having a cross-sectional area of the column, that is, an area larger than the friction plate formed at the tip of the column-shaped support, which is arranged on the ground (foundation) side. It can be said that this is a stable aspect.

FIG. 2 is a perspective view of the slider shown in FIG. 1 having a friction plate 20 having a smaller area (second
FIG. 8 is a schematic cross-sectional view showing an embodiment of (support body 18). Second support 18 attached to the structure or its base 16
Is fixed to the structure or its base 16 by means of a metal flange 24 having a rimmed guide ring for locking the support 18. The support 18 is a cushion rubber 2
The stainless steel plate 30 is fixed via 6 and has a resin film 28 as a contact surface formed at the tip of the support 18.
Are fixed, and these constitute the friction plate 22 of the support 18. As shown in FIG. 2, the second support 18
Has a large diameter on the side in contact with the cushion rubber 26,
The diameter of the portion where the friction plate 22 is formed at the tip is small, and the stepped portion is the edge portion 25 of the guide ring with an edge.
It is locked by. The support 18 and the stainless steel plate 30 constituting the friction plate 22 are firmly fixed with an adhesive, but the support 18 and the cushion rubber 26, and the cushion rubber 26 and the base 16 are not fixed and the edge Part 2
To the metal flange 24 having the guide ring with 5,
First, the support 18 having the friction plate 22 at the tip is set, and then the cushion rubber 26 is set, and then the metal flange 24 is fixedly arranged on the base 16 by the locking means such as the bolt 32.

When the friction plate 22 is arranged below the gravity in the direction of gravity like the second support 18, the support 18 is fixed to the base body 16 against gravity. In consideration of the fact that a strong shearing force is applied in the lateral direction at the time of an earthquake or the like, the support 18 which receives a frictional force capable of damping the vibration (displacement) of the shearing force repeatedly applied. Although there is a concern that reliability may not be achieved between the base 16 and the base 16 by a normal fixing method, by using a flange with a guide ring having a shape as in the present invention,
The stability of the fixing of the support to the substrate is significantly improved.

As the resin material forming the surface of the friction plate, polytetrafluoroethylene which is a fluororesin,
Examples thereof include those having a low friction coefficient by mixing a heat resistant resin material such as polyamide imide, polyamide, polyimide, polyester, silicon resin, epoxy resin and polysulfone. The resin material mixed with polytetrafluoroethylene may be used alone or in combination of two or more kinds,
From the viewpoint of achieving both low friction coefficient and strength,
Those containing a polytetrafluoroethylene resin and a polyamide-imide resin are preferred. When the polytetrafluoroethylene resin and the polyamide-imide resin are mixed and used, the content ratio of both is preferably 0.5: 9.5 to 3: 7, and more preferably 1: 9 to 3: 7. The ratio is preferably 1: 9 to 2.5: 7.5, and particularly preferably. When the content ratio of the polytetrafluoroethylene resin exceeds 3, the resin strength decreases and the abrasion resistance decreases, and when the content ratio is less than 0.5, the friction coefficient becomes too large and it is difficult to obtain desired performance. , Neither is preferable. In addition, a plasticizer or a filler may be added to the resin composition for forming the resin film as long as it does not adversely affect the friction coefficient, and a reinforcing material such as FRP may be mixed and used.

In the slider of the present invention, the friction plate 2
In order to improve the contact between 0 and 22, as shown in FIG.
A cushioning material (cushion rubber) 2 made of an elastic material such as rubber under at least one of the friction plates having a particularly small area 2
Arranging 6 is preferable from the viewpoint of keeping the two friction plates in parallel. According to this aspect, due to the compressive deformation of the elastic body, the two friction plates can be kept parallel even when an eccentric load is applied, and stress concentration on the friction plates due to the eccentric load, partial separation, etc. Can be effectively prevented.

The slider of the present invention having such a structure is excellent in the reliability and stability of the fixing of the support fixed to the structure or its supporting base downward in the direction of gravity to the upper structure or its supporting base. Since the stability of performance over time is good and it has high durability, a seismic isolation system having good durability and seismic isolation performance can be constructed by combining it with the composite laminate.

In the seismic isolation system, it is preferable to control the ratio of the weight supported by the slider as a whole to the total weight of the body, and the load bearing ratio P of the slider for the seismic isolation system is 0.3 to 1. 0 is preferred. Moreover, it is preferable to set a large initial rigidity as a countermeasure against wind sway, etc. As a result of the examination, the amount of sliders required to obtain the minimum initial rigidity is determined by
Was confirmed to be at least 0.30. Therefore, from the viewpoint of the balance between the seismic isolation effect and the wind sway preventing effect, P is preferably in the range of 0.30 ≦ P ≦ 1.0.

As described above, the problem with the slider is that when the upper surface is lifted by negative pressure, the frictional force becomes zero and the damper does not function. Therefore, it is desirable to install the laminated rubber having a large pullout resistance at a place where negative pressure is likely to occur. For this reason, it is preferable to install the laminated rubber at a position farthest from the fulcrum (center of gravity) where there is a possibility of the most vertical movement, specifically, at the corners of the body including the four corners.

[0026]

The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

(Embodiment 1) FIG. 2 is a schematic cross-sectional view of an upper end portion of a slider according to Embodiment 1 of the present invention, which is attached to a structure supporting base.

The friction plate 22 attached to the second support 18 is a stainless plate 3 having a diameter of 60 mm and a thickness of 3 mm.
A resin coating 28 having a thickness of 20 μm was formed from a resin composition in which a polytetrafluoroethylene resin and a polyamideimide resin were mixed at a ratio of 15:85.
The friction plate 22 was made of iron and had a diameter of 150 mmφ in a portion in contact with the cushion rubber 26 and a diameter of 60 mmφ on the side where the friction plate 22 was provided. The friction plate 22 was fixed to the surface of the support 18 having a thickness of 50 mm by an adhesive.

Inner diameter 150 mmφ, edge opening inner diameter 146
The support 18 is provided in the guide ring of the flange 24 having a guide ring of mmφ, edge thickness 2 mm, and wall thickness 5 mm.
Is arranged so that the portion having the friction plate 22 projects from the opening of the guide ring, a cushion rubber 26 having a diameter of 150 mmφ and a thickness of 10 mm is arranged thereon, and the flange 24 thereof is bolted to the structure supporting base 16. It was firmly fixed.

As the friction plate 20 adhered to the first support 14, a polytetrafluoroethylene resin and a polyamide-imide resin are mixed at a ratio of 15:85 on the surface of a stainless steel plate 31 having a size of 600 mm × 600 mm and a thickness of 3 mm. A resin coating film 29 having a thickness of 20 μm was formed by using the mixed resin composition. The friction plate 20 is adhered and fixed to the surface of the iron support 14 with an adhesive.
It was firmly fixed with bolts 32.

The first support 14 and the second support 16
The sliders 10 of Example 1 were configured by arranging the friction plates 20, 22 so as to contact each other. A schematic diagram of the slider 10 used in this embodiment is similar to that shown in FIG.

A load of 3 ton is applied to this slider 10, and a triangular wave having a sliding speed of 30 cm / sec is used to produce a 15c on one side.
Sliding deformation was carried out so as to obtain m, and this was repeated 100 times. Then, the state of the slider was visually observed, but no change was observed.

[0033]

INDUSTRIAL APPLICABILITY The slider of the present invention is suitable for use in combination with a composite laminate, has an excellent anti-vibration effect, can be easily attached to the upper structure, etc., and has stable vibration damping performance for a long period of time. It has the effect of being excellent in durability.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a slider used in a first embodiment of the present invention.

FIG. 2 shows a second slider used in the first embodiment of the present invention.
It is a schematic sectional drawing which shows the support body.

[Explanation of symbols]

10 slider 14 First support 18 Second support 20, 22 Friction plate 24 Flange with edged guide ring 25 Edge of guide ring

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Claims (4)

(57) [Claims] 1. A pair of supports attached to the respective members to damp vibrations between two members, and a pair of supports fixed to the tips of the supports and slidingly attenuating the vibrations. have different pair of friction plates of the area, support the lower the friction plates are arranged to be positioned in the gravity direction of the pair of support is retained edge guided in a fixed flange, said flange However, the support is provided by the locking means.
A slider characterized in that it is fixed to one of the members on opposite sides of the body . 2. A pair of supports attached to the respective members for damping the vibration between the two members, and a pair of supports fixed to the ends of the supports and slidingly dampening the vibrations. have different pair of friction plates of the area, support the lower the friction plates are arranged to be positioned in the gravity direction of the pair of support is retained edge guided in a fixed flange, said flange The extension on the outside of the support
And has one of the above-mentioned members by the locking means in the extension portion.
A slider characterized by being fixed to one side . 3. Damping vibration between two members
A pair of supports attached to each member and the support
It is fixed to the tip of the holding body and slides on each other to dampen the vibration.
A pair of friction plates facing each other and having different areas.
At the tip of the plate, polytetraflu
Contains an ethylene resin and a polyamide-imide resin,
Polytetrafluoroethylene resin and polyamide-imide resin
Resin whose content ratio with fat is 0.5: 9.5 to 3: 7
And a resin coating formed of
Of these, the friction plate is located below the gravity direction.
Support rests on a flange that holds the rimmed guide in place.
A slider characterized by being 4. A building in which the slider according to any one of claims 1 to 3 is fixed.