JP2000193033A - Vibration control support and installation method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control support to reduce the size of the vibration control support itself and save a space for the whole of a structure, and facilitate the execution of a work. SOLUTION: This vibration control support comprises a spring unit 22 composed of a lower flange 23 arranged on a base board B and a spring 14 fixed on the upper surface of the lower flange 23; and a housing 12 arranged in a manner to surround the spring unit 22 and supported by a spring 14 and securely buried in a floor slab S. An insertion hole 24 to be engaged with a pin 25 fixed on the base board B and allow relative displacement in a vertical direction of the spring unit 22 from the base board B and regulate relative displacement in a horizontal direction is formed in the under surface of the lower flange 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration bearing which is interposed between a slab of a structure and a base for supporting the structure to prevent transmission of vibration therebetween, and a method of installing the same. It is.

[0002]

2. Description of the Related Art FIGS.
The following is used. The anti-vibration bearing 1 shown in FIG.
, A lower flange 3 fixed to the lower surface of the floor slab S to be damped by the anchor bolts 2,... And a lower flange 3 and an upper flange 4 interposed between the lower flange 3 and the upper flange 4. And a rubber bearing 5 for transmitting the load of the floor slab S to the base B side. Further, the anti-vibration bearing 7 shown in FIG.
, A large number of coil springs 8,... Are used in place of the rubber bearings 5.

In these vibration isolating bearings 1 and 7,
Since there is a concern that the position of the bearing may shift during the earthquake, it is necessary to firmly fix the lower and upper flanges 3 and 4 with the anchor bolts 2,. Anchor bolt 2, ...
A space must be left between the base B and the floor slab S in order to perform the fastening work and the inspection work on the floor, and these have led to the introduction of the vibration isolation bearings 1, 7 into the actual structure. This has been a factor in cost increase and space restrictions.

On the other hand, in a foreign country or the like where an earthquake is less likely to occur, a vibration isolator 10 as shown in FIG. 8 is used. The anti-vibration support 10 has a schematic configuration including a spring unit 11 fixed to the base B side and a cylindrical housing 12 provided so as to surround the spring unit 11. The spring unit 11 includes a lower flange 13 disposed on the upper surface of the base B, a spring 14 fixed to the upper surface of the lower flange 13, and an elastic member fixed to the upper end 14 a of the spring 14 and resilient from the lower flange 13 via the spring 14. It has a configuration in which an upper flange 15 is supported.

On the other hand, the housing 12 is embedded in the floor slab S and the upper flange 1 of the spring unit 11.
5 so that the load of the floor slab S is transmitted to the base B via the housing 12 and the spring unit 11.

In this case, the lower surface of the lower flange 13 of the spring unit 11 and the upper surface of the base B are not mechanically fixed, but merely the spring unit 11 is placed on the upper surface of the base B. Or simply fixed using an adhesive pad or the like.

When installing the vibration isolating bearing 10, the floor slab B is constructed in a state where the housing 12 is embedded in advance, and after the floor slab B is completed, the spring unit 11 is dropped and arranged in the housing 12. You can do so. Accordingly, unlike the vibration isolating bearings 1 and 7 shown in FIGS. 6 and 7, there is no need to jack up the floor slab B at the time of installation or the work of fastening the anchor bolts. Cost reduction can be achieved.

[0008]

However, when an anti-vibration bearing 10 having the above-mentioned advantages is to be introduced into an earthquake country such as Japan, the relative position between the spring unit 11 and the base B due to the earthquake. , There is a concern that the lower flange 13 may be displaced in the horizontal direction, so that it is necessary to fix the lower flange 13 to the base B using the anchor bolts 17,. Also, in this case,
In order to secure the installation space for the anchor bolts 17,..., It is necessary to increase the size of the housing 12 ′ as compared with the housing 12 in FIG. 8, and to provide a space between the base B and the floor slab S. This has caused a space problem when the anti-vibration bearing 10 is introduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can reduce the size of the vibration-isolation support itself, save space in the entire structure, and facilitate the installation. It is an object to provide an installation method.

[0010]

Means for Solving the Problems To solve the above problems, the present invention employs the following means. That is,
The anti-vibration bearing according to claim 1 is interposed between a base of a structure and a slab located on the base to support the slab and prevent transmission of vibration between the slab and the base. A spring unit including a lower flange disposed on the base and a spring fixed to an upper surface of the lower flange, and provided so as to surround the spring unit, at least a part of which is provided. And a housing buried and fixed to the slab, and a lower surface of the lower flange is engaged with a base engaging portion fixed to the base, so that the spring unit is And a flange engaging portion for restricting the relative displacement in the horizontal direction while permitting the relative displacement in the vertical direction with respect to the base.

[0011] With such a structure, in this vibration-proof bearing, the spring unit can be easily attached to the base from the vertical direction.

According to a second aspect of the present invention, there is provided an anti-vibration bearing according to the first aspect, wherein the base engaging portion has a lower end fixed to the base and an upper end positioned above the base. , And the flange engaging portion is formed by an insertion hole into which the pin can be inserted.

[0013] With such a configuration, in this vibration isolating bearing, the spring unit and the base can be easily engaged with a simple configuration.

According to a third aspect of the present invention, there is provided a method for installing a vibration isolating support, comprising: a spring unit installed on a base of a structure; and a spring unit provided so as to surround the spring unit and elastically supported by the spring unit. And a housing integrated with a slab located on the base and transmitting the vibration between the slab and the base by supporting the slab from the base via the spring unit and the housing. A method for installing an anti-vibration bearing, which is arranged on the base such that at least an upper end portion thereof protrudes upward from the base, and is formed in a cylindrical shape on the base. A template having substantially the same dimension as the inner diameter of the housing of the vibration-proof bearing is fitted to the upper end of the pin and arranged. The slab is disposed on the base so as to be located inside the lower end of the housing and to be fitted with the lower end, and the slab is formed integrally with the housing outside the housing, and The template is removed from the inside of the housing, and thereafter, the spring unit is disposed inside the housing, and the housing is supported by the spring unit.

In the method of installing the vibration isolating bearing, the template can be used for positioning the housing when constructing the slab.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. Note that the main configuration of the anti-vibration bearing in this embodiment is the same as that of the anti-vibration bearings 10 and 10 ′ shown in FIGS. 8 and 9, and therefore, differences from these will be mainly described here. In addition, the same components as those in FIGS. 8 and 9 are denoted by the same reference numerals, and description thereof is omitted.

FIG. 2 is a diagram showing a schematic configuration of a railway structure 19 to which a vibration isolating support 18 according to an embodiment of the present invention is applied. The railway structure 19 includes a base B and a floor slab S provided on the base B and having a track 20 laid thereon.
The anti-vibration bearing 18 is a base B
Between the floor slab S and the floor slab S, and serves to transmit the load of the floor slab S to the base B and prevent vibration from the floor slab S from being transmitted to the base B.

FIG. 1 is a diagram showing details of the structure of such a vibration-proof bearing 18. As shown in FIG. The anti-vibration bearing 18 has a schematic configuration including a spring unit 22 disposed on the base B and the housing 12 provided so as to surround the spring unit 22.

Of these, the spring unit 22 has a configuration in which an insertion hole (flange engagement portion) 24 is provided in a lower flange 23 thereof. On the other hand, a pin (base engaging portion) 25 is disposed on the base B. The pin 25 is in a state where the lower end 25a is fixed to the base B and the upper end 25b is arranged so as to protrude above the base B, and
The upper end 25 b is configured to be inserted into the insertion hole 24.

In this case, since the pin 25 is only inserted into the insertion hole 24, the pin 25 and the insertion hole 24 allow relative displacement of the spring unit 22 with respect to the base B in the vertical direction. At the same time, the relative displacement in the horizontal direction is regulated.

Next, a method of installing the vibration isolating bearing 18 will be described. In order to install the vibration isolation bearing 18, first, as shown in FIG. 3, the pins 25 are installed on the base B, and the template 26 is arranged from above the pins 25. Here, the template 26
Has a diameter substantially the same as the inner diameter of the housing 12 when viewed in a plan view, and is formed so as to fit inside the lower end 12a (see FIG. 1) of the housing 12. Further, the template 26 has a configuration having an insertion hole 27, and the pin 25 is fitted into the insertion hole 27 here.

Next, as shown in FIG. 4, the housing 12 is disposed from above in the installation position of the template 26 on the base B,
The lower end 12a is fitted to the template 26. Further, as shown in FIG. 3, concrete C is cast outside the housing 12 and the floor slab S is integrated with the housing 12 to construct the same. Then, as shown in FIG. It is removed from the inside of the housing 12.

Then, the spring unit 22 (see FIG. 1)
Is dropped inside the housing 12 and arranged. In this case, the spring unit 22 (FIG. 1) is inserted by inserting the upper end 25b of the pin 25 into the insertion hole 24 (see FIG. 1).
On the base B). Further, a spring unit 22 (see FIG. 1) is used by using a jack or the like.
Is compressed downward, and the projection 28 provided inside the housing 12 is engaged with the upper flange 15 (see FIG. 1) to obtain the state shown in FIG.

In the above-mentioned vibration-proof bearing 18, the pin (base engaging portion) 25 fixed to the base B and the insertion hole 24 (flange engaging portion) provided in the lower flange 23 of the spring unit 22 are used. Spring unit 22 for B
The horizontal displacement of the spring unit is restricted and the vertical displacement is allowed.
When installing the unit, it is not necessary to fix the unit with an anchor bolt or the like.
Can be easily installed simply by dropping from above, so that the installation work can be facilitated. Further, as compared with the related art, the installation space for the anchor bolt can be omitted, so that the vibration isolator 18 can be reduced in size and the railroad structure 19 can be saved in space. Furthermore, in this vibration isolating bearing 18,
Even when the spring unit 22 needs to be replaced due to deterioration or breakage of the spring 14 or a change in the spring characteristics, the replacement operation can be easily performed without jacking up or breaking the slab S.

In this case, since the horizontal displacement between the spring unit 22 and the base B is restricted by a simple structure including the pins 25 and the insertion holes 24, vibration can be easily and inexpensively reduced. Installation of the bearing 18 can be performed.

Further, according to the above-described method of installing the vibration isolating support 18, the position of the template 26 is determined by the position of the pin 25, and the position of the housing 12 is determined by the template 26. Therefore, it is possible to easily adjust the position of the housing when constructing the floor slab S. further,
When the spring unit 22 is installed, the pin 25 is inserted into the insertion hole 2.
The spring unit 22 is inserted into the housing 1 so as to be inserted into the housing 4.
2, the workability is good, and it is possible to contribute to shortening of the construction period and cost reduction.

[0027]

As described above, in the vibration isolating support according to the first aspect, the spring engaging the base with the base engaging portion fixed to the base and the flange engaging portion provided on the lower flange of the spring unit. Since the relative displacement of the unit in the horizontal direction is restricted and the relative displacement in the vertical direction is allowed, it is not necessary to fix the spring unit with anchor bolts, etc. It can be easily installed simply by dropping it from, so that the installation work can be facilitated. Further, as compared with the conventional case, the installation space for the anchor bolt can be omitted, so that the vibration-proof bearing can be reduced in size and the space to be applied to the structure to be applied can be reduced. In addition, this anti-vibration support makes it easy to replace the spring unit without having to jack up or break it, even when the spring unit needs to be replaced, such as when the spring is deteriorated or damaged or the spring characteristics are changed. It can be performed.

In the vibration isolating bearing according to the second aspect, since the relative displacement in the horizontal direction between the spring unit and the base is regulated by a simple structure including the pin and the insertion hole,
The installation of the vibration isolation bearing can be performed easily and at low cost.

According to the third aspect of the present invention, the position of the template is determined by the position of the pin, and the position of the housing is determined by the template. Position adjustment of the housing at the time of slab construction can be easily performed. Furthermore, when installing the spring unit, the spring unit only needs to be dropped into the housing so that the pins are inserted into the insertion holes, so that the workability is good, and it is possible to contribute to shortening the construction period and reducing costs. Become.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of an anti-vibration bearing schematically showing an embodiment of the present invention.

FIGS. 2A and 2B are views showing a railway structure to which the vibration isolating bearing shown in FIG. 1 is applied, wherein FIG.
FIG.

FIG. 3 is an elevational sectional view showing one process when installing the vibration isolating bearing shown in FIG. 1;

FIG. 4 is an elevational sectional view showing the next step of FIG. 3;

FIG. 5 is an elevational sectional view showing the next step of FIG. 4;

FIG. 6 is an elevational sectional view of a vibration-proof bearing showing the conventional technique of the present invention.

FIG. 7 is an elevational sectional view showing another example of the same.

FIG. 8 is an elevational sectional view showing still another example of the same.

FIG. 9 is an elevational sectional view showing still another example of the same.

[Description of Signs] B Base S Floor Slab 12 Housing 14 Spring 15 Upper Flange 18 Vibration Isolation Bearing 19 Railway Structure 22 Spring Unit 23 Lower Flange 24 Insertion Hole (Flange Engagement Part) 25 Pin (Base Engagement Part) 25a Lower End Part 25b Upper end part 26 Template

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideyo Shiokawa 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Katsuei Katsuzawa 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Hiroyuki Watanabe 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation F-term (reference) 2D056 AA02 AA07 3J048 AA01 BC03 BF04 CB01 DA01 EA38

Claims (3)

[Claims] An anti-vibration bearing interposed between a base of a structure and a slab located on the base to support the slab and prevent transmission of vibration between the slab and the base. A spring unit including a lower flange disposed on the base and a spring fixed to an upper surface of the lower flange; and a spring unit provided so as to surround the spring unit, at least a part of which is supported by the spring. And a housing buried and fixed to the slab, and a lower surface of the lower flange is engaged with a base engaging portion fixed to the base, so that the spring unit is perpendicular to the base. A vibration isolating bearing having a flange engaging portion for allowing relative displacement in the horizontal direction and restricting relative displacement in the horizontal direction. 2. The anti-vibration bearing according to claim 1, wherein the lower end of the base engaging portion is fixed to the base and the upper end protrudes above the base. The vibration isolating bearing is constituted by a pin, and the flange engaging portion is constituted by an insertion hole into which the pin can be inserted. 3. A spring unit installed on a base of a structure, and a slab that is provided so as to surround the spring unit, is elastically supported by the spring unit, and is integrated with a slab located on the base. And a vibration-proof bearing for preventing the transmission of vibration between the slab and the base by supporting the slab from the base via the spring unit and the housing. A method, comprising: arranging a pin on the base so that at least an upper end thereof projects upward from the base; and, on the base, an inner diameter of a housing of the vibration-proof bearing formed in a cylindrical shape. A template having substantially the same dimensions is disposed by fitting to an upper end of the pin, and the housing is positioned such that the template is located inside a lower end of the housing. Disposed on the base so as to fit with the lower end, outside the housing, the slab is integrally formed with the housing, and the template is removed from the inside of the housing. Thereafter, the spring unit is disposed inside the housing, and the housing is supported by the spring unit.