JP2000234392A - Fitting metal for base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting metal for a base isolation device capable of easily correcting the positional drift of the base isolation device or an anchor nut, capable of fixing the base isolation device at its expected position, having extremely good workability, and capable of simply replacing the base isolation device. SOLUTION: This fitting metal for a base isolation device 2 is formed on a ground side fitting section 2a or a structure side fitting section 2b forming the base isolation device 2 and is inserted into a large-diameter insertion hole 2d having the diameter larger than the outer diameter of a fastener 5 fixing the ground side fitting section 2a or the structure side fitting section 2b to the ground or a structure. The fitting metal is provided with an insertion section 1a inserted into the large-diameter insertion hole 2d and having the same depth as the depth of the large-diameter insertion hole 2d, a flange section 1b formed at the upper end of the insertion section 1a and having the outer diameter larger than the diameter of the large-diameter insertion hole 2d, and an oblong hole 1c formed long in the outer peripheral direction from the center of the insertion section 1a to be inserted with the fastener 5 for fixing the ground side fitting section 2a or the structure side fitting section 2b to the ground or the structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting bracket for a seismic isolation device used for fixing the seismic isolation device to the ground or a structure.

[0002]

2. Description of the Related Art As is well known, various seismic isolation devices have been developed to protect structures from vibrations caused by earthquakes. In these seismic isolation devices, a large number of rubber plates are provided between one flange fixed to the ground, the other flange fixed to the structure, and the one flange and the other flange. A seismic isolation device called a rubber seismic isolation device or a seismic isolation device that does not transmit ground vibrations to a structure by sliding (sliding) the ground and structure together. What is called is known.

When such a seismic isolation device is fixed to the ground side and the structure side, insertion holes are formed on both the ground side and the structure side at positions where bolts and the like are inserted in advance, or an anchor is provided. With the nut buried in the ground, after the end of each base on the structure side is fixed, for example,
In many cases, the seismic isolation device is fixed using the above-mentioned insertion hole or using an anchor nut. However, a method of fixing the seismic isolation device 50 referred to as rubber seismic isolation will be described as an example. As shown in FIG. 5, the fixing position of one flange portion 50a to be fixed to the ground 51 and the structure The fixing position of the other flange portion 50b to be fixed to the object 52 may be due to the poor installation state of the anchor nut or the like or the inaccurate insertion position of the insertion hole formed on the structure side, If they are shifted from each other, the seismic isolation device 50 must be fixed in a slightly shifted state. However, in this case, the seismic isolation effect of the seismic isolation device 50 is not effectively exerted. Not only the seismic isolation device 50 having a structure called rubber seismic isolation described above, but also a seismic isolation device called a sliding seismic isolation (not shown) is used for a bearing plate fixed to the ground and having an upper surface formed as a sliding surface. It is desirable that a support column supporting the structure and having a lower surface formed as a sliding surface is located at the center.
Therefore, in order to prevent such a displacement of the seismic isolation device, it is originally necessary to accurately position the anchor nut buried on the ground side, or a through hole such as a bolt formed on the base. Must be drilled accurately. However, it is extremely difficult to apply such an anchor nut with high precision in advance.

Therefore, as shown in FIG. 6, conventionally, such a displacement of the anchor nut or the like is corrected, and even if the anchor nut is slightly displaced, the seismic isolation device can be fixed at an accurate position as shown in FIG. A method using a grout washer 53 has been proposed. This method uses the seismic isolation device 5
0, the seismic isolation device 5 is attached to one of the flange portions 50a.
A large-diameter insertion hole 50c having a peripheral surface larger in diameter than the insertion hole into which the shaft portion 54a of the bolt 54 for fixing the zero and the ground is screwed or inserted is formed. The grout washer 53 is placed on the formation position, and the bolt 54 is fastened to the anchor nut 55 fixed to the ground via the grout washer 53. As shown in FIG. 7, the grout washer 53 has an insertion hole 53a into which a shaft portion 54a of the bolt 54 is inserted.
Are formed, and adhesive injection holes 53b and 53c are formed on both sides of the insertion hole 53a. As shown in FIG. 6, these adhesive injection holes 53b and 53c communicate with passages 53d and 53e formed in the grout washer 53, and these passages 53d and 53e are connected to the grout washer 53. Communicates with the opening formed in the lower surface,
It is also communicated with the large diameter insertion hole 50c.

That is, in this method, the displacement of the anchor nut 55 is absorbed by the large-diameter insertion hole 50c, and the bolt 54 and the anchor nut 55 are fastened using the grout washer 53. By filling and hardening a non-shrink grouting agent (epoxy resin adhesive) from the adhesive injection holes 53b and 53c into the large-diameter insertion hole 50c through the passages 53d and 53e, the seismic isolation device 50 can be accurately positioned. It is intended to be firmly fixed in position.

[0006]

However, when the above grout washer 53 is used, for example, when the above-mentioned anchor nut 55 is displaced and installed, each time the grout washer 53 is installed, one of the seismic isolation devices 50 is used. The number of the large-diameter insertion holes 50c formed in the flange portion 50a is filled with the non-shrinkable grout agent, and the user must wait for the non-shrinkage grout agent to harden. In addition, once the non-shrink grout agent is filled, it is extremely difficult to remove the seismic isolation device 50 for replacement or maintenance.

Therefore, the present invention has been proposed to solve the problems of the above-mentioned conventional method,
Not only can the position of the seismic isolation device or the anchor nut be easily corrected and fixed at the position where the seismic isolation device should be fixed, but also the workability is extremely good. It is another object of the present invention to provide a mounting bracket for a seismic isolation device that can be easily performed.

[0008]

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems, and the first invention (the invention described in claim 1) is a ground-side device constituting a seismic isolation device. It is formed in the mounting portion or the structure-side mounting portion, and is inserted through the large-diameter insertion hole having a diameter larger than the outer diameter of the fastener for fixing the ground-side mounting portion or the structure-side mounting portion to the ground or the structure. A mounting part which is inserted into the large-diameter insertion hole and has the same depth as the depth of the large-diameter insertion hole; and a large-diameter insertion part formed at an upper end of the insertion part. A flange portion having an outer diameter larger than the hole and a fastening formed to extend from the center of the insertion portion in the outer peripheral direction to fix the ground-side mounting portion or the structure-side mounting portion to the ground or a structure. And a long hole through which the tool is inserted.

The second invention (the invention described in claim 2)
Is a large-diameter insertion member formed on a base constituting the structure and having a diameter larger than an outer diameter of a fastener for fixing a structure-side mounting portion of the seismic isolation device fixed to the structure to the structure. A mounting bracket for the seismic isolation device that is inserted into the hole, the insertion portion being inserted into the large-diameter insertion hole and having the same depth as the depth of the large-diameter insertion hole, and formed at the upper end of the insertion portion. A flange portion having an outer diameter larger than that of the large-diameter insertion hole and a fastener formed to extend from the center of the insertion portion to the outer periphery and fixing the structure-side mounting portion to a structure are inserted. And a slot that is
It is characterized by comprising.

The seismic isolation device of the first and second aspects of the invention is not only for fixing a seismic isolation device called a rubber seismic isolation device, but also for a so-called sliding seismic isolation device. It can also be used when fixing a seismic isolation device or a seismic isolation device called roller isolation. That is, the "ground-side mounting portion" described in the first invention as a portion where the large-diameter through-hole forming the present invention is formed is the same as that of the conventional seismic isolation device called rubber seismic isolation. The "structure-side mounting portion" refers to the other flange portion also described in the section of "Technique". Further, in the seismic isolation device called a sliding seismic isolation device, the “ground side mounting portion” refers to a bearing plate fixed to the ground and having an upper surface formed as a sliding surface, and the “structure side mounting portion” The lower surface refers to a support column which is located on the support plate and supports the structure and which slides on the sliding surface of the support plate or a member for fixing the support column and the base. Furthermore, in the seismic isolation device called so-called roller seismic isolation, the “ground-side mounting portion” refers to a lower bearing plate on which a sphere such as a roll bearing is placed on the upper surface.
The “structure-side mounting portion” refers to an upper support plate supported by the sphere or a member that fixes the upper support plate to a base.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a seismic isolation device according to an embodiment of the present invention. First, the mounting bracket 1 of the seismic isolation device according to the first embodiment will be described in detail with reference to FIGS. 1 to 3. In this embodiment, the present invention is applied to a case where the above-described seismic isolation device called rubber seismic isolation is fixed.

First, as shown in FIG. 1 and FIG. 2, this seismic isolation device 2 is a seismic isolation device 5 described in the section of the prior art.
The seismic isolation device is the same as the seismic isolation device 0, and includes one flange portion 2a fixed to the ground 3, the other flange portion 2b fixed to the base constituting the structure, and the laminated rubber 2c. The one flange portion 2a (the ground-side mounting portion constituting the present invention) is formed with a plurality of large-diameter insertion holes 2d having a diameter larger than an outer diameter of a bolt described later. The mounting bracket 1 according to the present invention includes an insertion portion 1a inserted into the large-diameter insertion hole 2d from above, a flange portion 1b formed on an outer periphery of an upper end of the mounting bracket 1, and
And a bolt insertion hole 1c formed from the upper surface to the lower surface of the mounting bracket 1. The insertion portion 1a
Has an outer diameter substantially equal to the inner diameter of the large-diameter insertion hole 2c, and the bolt insertion hole 1c is a long hole extending from the center of the mounting bracket 1 in the outer peripheral direction as shown in FIG. .

In the ground 3, at least the same number of anchor nuts 4 as the number of large-diameter insertion holes 2d formed in one flange 2a of the seismic isolation device 2 are embedded. The upper surface of the anchor nut 4 is flush with the upper surface of the ground 3. Therefore, the mounting bracket 1 described above
A work method for fixing the seismic isolation device 2 using will be described. First, the seismic isolation device 2 is placed on the ground 3,
The alignment between the anchor nut 4 and the large-diameter insertion hole 2d is performed. Next, the insertion portion 1a of the mounting bracket 1 according to the above-described embodiment is inserted into each large-diameter insertion hole 2d.
Then, a shaft 5a of a bolt 5 for fixing the seismic isolation device 2 and the ground 3 is inserted into each bolt insertion hole 1c formed in the mounting bracket 1, and the bolt 5 is inserted into the ground 4. It is screwed (temporarily fixed) slightly to each embedded anchor nut 4. Since the anchor nuts 4 are usually buried by using a jig or the like, each of the anchor nuts 4 used for fixing the specific seismic isolation device 2 is displaced. In all cases, they are shifted in the same direction. Therefore, after the temporary fixing is performed as described above, the entire seismic isolation device 2 is moved to a position to be originally fixed. At this time, the bolt insertion holes 1c formed in the mounting bracket 1 are elongated holes, and the outer diameter of the insertion portion 1a is circular. Even when the seismic isolation device 2 is not moved in the moving direction of the seismic isolation device 2, when the seismic isolation device 2 is moved, the mounting bracket 1 rotates and all the bolt insertion holes 1c are directed in the same direction. FIG. 1 shows an anchor nut 4
Is slightly shifted to the right side of the original buried position, and shows a state after the seismic isolation device 2 is shifted to the left to correct this position shift. That is, when the temporary fixing of the seismic isolation device 2 is completed, the seismic isolation device 2 is then moved by the displacement length of each anchor nut 4, and then, the bolts 5 are screwed into the ground 3 and the seismic isolation device 2. 2 is fastened to one of the flange portions 2a. With the above-described operation method, even when the anchor nut 4 is displaced, the seismic isolation device 2 can be fixed at the original fixing position.

As described above, by using the mounting bracket 1 according to the above-described embodiment, even when the anchor nut 4 buried in the ground is displaced, the seismic isolation device 2 can be moved to its original position. Can be fixed in position. And
By using such a mounting bracket 1, there is no need to use a non-shrinkage grouting agent as in the conventional method,
Workability can be greatly improved, and no special trouble occurs even when the fixed seismic isolation device 2 is replaced.

In the above embodiment, the method of fixing the anchor nut 4 buried in the ground 3 and the seismic isolation device 2 using the mounting bracket of the seismic isolation device according to the present invention has been described. The mounting bracket of the seismic isolation device according to the present invention can be used even when the base constituting the structure and the seismic isolation device are fixed. Therefore, the second
As an embodiment of the present invention, a method of fixing the steel base 7 and the seismic isolation device 2 using the above-described mounting bracket 1 will be briefly described with reference to FIG.

The steel base 7 is a base constituting a structure and is made of H-shaped steel. The lower plate 7a of the steel base 7 constitutes the present invention (the invention of claim 2). A large-diameter insertion hole 7b is formed. This large-diameter insertion hole 7
“b” is a portion through which the insertion portion 1a of the mounting bracket 1 is inserted. On the other hand, the other flange portion 2b constituting the seismic isolation device 2 has an insertion hole 2 through which a shaft portion 8a of a bolt 8 for fixing the seismic isolation device 2 and the steel frame base 7 is inserted.
f is drilled. Accordingly, the mounting bracket 1 is inserted into the large-diameter insertion hole 7b formed in the lower plate portion 7a of the steel base 7, and the seismic isolation device 2 is formed from the bolt insertion hole 1c formed in the mounting metal 1. The other flange 2b
The steel base 7 and the seismic isolation device 2 are fixed by inserting the shaft portion 8a of the bolt 8 into the insertion hole 2f formed in the base member and fastening it with the nut 9.

As described above, the large-diameter insertion hole 7b
Is formed, and the steel base 7 and the seismic isolation device 2 are fixed using the mounting bracket 1, so that the fixing position of the seismic isolation device 2 is slightly shifted due to the anchor nut buried in the ground. Even if it is inevitable to fix it at the original position, it can be fixed at the original fixing position.

In the second embodiment described above, the large-diameter insertion hole constituting the present invention is illustrated and described in the steel frame base 7, but the large-diameter insertion hole is formed as described above. It may be bored in the other flange portion 2b constituting the seismic isolation device 2. In this case, the mounting bracket 1 is inserted from below and fastened by bolts 8 and nuts 9. In such a case, the seismic isolation device 2 can be fixed even if an insertion hole (not shown) having substantially the same inner diameter as the outer diameter of the shaft 8a of the bolt 8 is formed in the steel frame base 7.

[0019]

As is clear from the above description of each embodiment of the present invention, according to the present invention, the fixing position (embedding position) of the anchor nut fixed to the ground and the insertion through the base are formed. Even if the hole is misaligned, not only can the seismic isolation device be fixed in its original position, but there is no need to inject a non-shrink grout as in the case of using a conventional grout washer. Therefore, the workability is extremely good, and the seismic isolation device once fixed can be easily replaced later.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state where a seismic isolation device is fixed by a mounting bracket of the seismic isolation device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a mounting bracket and other components shown in FIG.

FIG. 3 is a plan view of the mounting bracket shown in FIG. 1;

FIG. 4 is an exploded perspective view showing a structure for fixing the seismic isolation device and the steel base using the mounting bracket of the seismic isolation device according to the present invention.

FIG. 5 is a front view showing a state in which the seismic isolation device is shifted and fixed.

FIG. 6 is a sectional view showing a state where the seismic isolation device is fixed using a grout washer.

FIG. 7 is an exploded perspective view of a grout washer and other components.

[Description of Signs] 1 Mounting bracket for seismic isolation device 1a Insertion portion 1b Flange portion 1c Bolt insertion hole 2 Isolation device 2a One flange portion 2b The other flange portion 3 Ground 4 Anchor nut 5 Bolt 7 Steel base

Claims (2)

[Claims] An outer diameter of a fastener formed on a ground-side mounting portion or a structure-side mounting portion constituting a seismic isolation device and fixing the ground-side mounting portion or the structure-side mounting portion to the ground or a structure. A mounting bracket of the seismic isolation device that is also inserted into the large-diameter insertion hole having a large diameter, and an insertion portion that is inserted into the large-diameter insertion hole and has the same depth as the depth of the large-diameter insertion hole. A flange portion formed at an upper end of the insertion portion and having an outer diameter larger than that of the large-diameter insertion hole; and a ground-side mounting portion or a structure side formed to extend from the center of the insertion portion in the outer peripheral direction. A mounting bracket for a seismic isolation device, comprising: an elongated hole through which a fastener for fixing the mounting portion to the ground or a structure is inserted. 2. A structure formed on a base constituting a structure and having a larger diameter than an outer diameter of a fastener for fixing a structure side mounting portion of a seismic isolation device fixed to the structure to the structure. A mounting bracket for the seismic isolation device inserted through the large-diameter insertion hole, the insertion portion being inserted into the large-diameter insertion hole and having the same depth as the depth of the large-diameter insertion hole, and an upper end of the insertion portion And a flange portion having an outer diameter larger than that of the large-diameter insertion hole, and a fastening portion formed to extend from the center of the insertion portion in the outer peripheral direction and fixing the structure-side mounting portion to a structure. A mounting bracket for a seismic isolation device, comprising: a long hole through which a tool is inserted.