JP2004270751A - Piping structure for base isolation structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping structure for a base isolation structure that can be disposed without securing space vertically and can smoothly deform following a relative displacement of a lower structure and an upper structure. <P>SOLUTION: The piping structure 12 for the base isolation structure comprises a first coupling 32 connected to a pipe 22 on a lower structure side, a second coupling 34 connected to a pipe 24 on an upper structure side, a first pipe body 36 connected to the first coupling 32, a second pipe body 38 connected to the second coupling 34, a third coupling 40 for connecting an end of the first pipe body 36 to an end of the second pipe body 38 via an elbow 44, and a carriage 42 for holding the third coupling 40. The first to third coupling 32, 34 and 40 are metal universal joints. In a plan view at a normal time when a building is not moving, the first pipe body 36 and the second pipe body 38 are disposed so as to extend substantially orthogonally. The carriage 42 is movable horizontally and is constituted so that the vertical height of the third coupling 40 can be adjusted. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, an upper structure is supported on a lower structure of a structure via a seismic isolation device, and a lower structure side pipe disposed on the lower structure, and an upper structure side pipe disposed on the upper structure. The present invention relates to a piping structure for a seismic isolation structure that connects the above.
[0002]
[Prior art]
For base-isolated structures (including base-isolated buildings and base-isolated floors) in which the upper structure is supported via seismic isolation devices with respect to the lower structure of the structure, the lower structure and the upper structure are horizontal when an earthquake occurs. Relatively displaced in the direction.
On the other hand, various facilities such as water and sewage and gas are installed in the structure, but in the case of seismic isolation structures, the lower structure and the upper structure are displaced in the horizontal direction relative to each other. It is necessary to connect the pipe and the upper structure side pipe provided in the upper structure by a structure capable of absorbing the relative displacement.
As such a pipe structure for a seismic isolation structure, a structure in which a lower structure side pipe and an upper structure side pipe are connected using a universal joint or an elbow is known (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP, 2002-31266, A
[Problems to be solved by the invention]
However, this piping structure for a seismic isolation structure requires piping that extends in the vertical direction, and cannot be adopted if piping space cannot be secured in the vertical direction.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to be able to arrange without securing a piping space in a vertical direction, to smoothly deform according to a relative displacement between a lower structure and an upper structure. An object of the present invention is to provide a piping structure for a seismic isolation structure.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is directed to an upper structure, wherein an upper structure is supported through a seismic isolation device with respect to a lower structure of a structure, a lower structure side pipe is disposed in the lower structure, and an upper structure side is provided in the upper structure. A pipe structure for a seismic isolation structure, wherein a pipe is provided and connects an end of the lower structure side pipe and an end of the upper structure side pipe which are horizontally separated from each other, wherein the end of the lower structure side pipe A first joint connected to an end of the upper structure side pipe, a first pipe connected to the first joint at one end, and an end connected to the second joint. A second pipe body, a third joint connecting the other end of the first pipe body and the other end of the second pipe body, and a truck on which the third joint is mounted, The first, second, and third joints are configured as universal joints, and the first tube and the second tube are configured such that 3 is connected to via a joint bent manner, the carriage is characterized in that the vertical height of the third joint in the mobile movable in the horizontal direction is configured to be adjusted.
In the piping structure for a base-isolated structure according to the present invention, when the relative displacement between the lower structure and the upper structure is made, the third joint is smoothly and quickly moved by the bogie following the relative displacement. Is deformed.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the first embodiment will be described.
FIG. 1 is a plan view of the piping structure according to the first embodiment, in which a dotted line indicates a state where the building and the foundation are not relatively horizontally displaced, and a solid line indicates a state where the building and the foundation are relatively horizontally displaced. FIG. 2A shows a front view of the first embodiment of the bogie.
A building (structure) 14 is supported by a base (substructure) via a seismic isolation device so as to be relatively displaceable in the horizontal direction. A lower structure side pipe 22 is provided on the foundation, an upper structure side pipe 24 is provided in the building 14, and an end 22A of the lower structure side pipe 22 and an end 24A of the upper structure side pipe 24 are horizontally aligned. is seperated.
In the piping structure 12 for the seismic isolation structure according to the embodiment, the end 22A of the lower structure-side pipe 22 and the end 24A of the upper structure-side pipe 24 are connected.
The pipe structure 12 has a first joint 32 connected to an end 22A of the lower structure side pipe 22, a second joint 34 connected to an end 24A of the upper structure side pipe 24, and one end of the first joint 32. A connected first pipe 36, a second pipe 38 having one end connected to the second joint 34, and a third pipe connecting the other end of the first pipe 36 and the other end of the second pipe 38. It has a joint 40 and a carriage 42 on which the third joint 40 is placed.
[0007]
The first joint 32, the second joint 34, and the third joint 40 are all metal universal joints having two joint portions T1 and T2. Here, the universal joint means that the two joints T1 and T2 can relatively swing in any direction with respect to one joint, and the axis of the joint with respect to one joint. This is a joint that is connected to the center so that the other joint can rotate.
Further, in the present embodiment, the first joint 32, the second joint 34, and the third joint 40 all have a telescopic function. That is, one joint portion T2 of the two joint portions T1 and T2 is configured, for example, by fitting two pipes coaxially and slidably in a liquid-tight or air-tight manner.
The universal joint having such an expansion and contraction function is a conventionally known commercially available product, and for example, a product name “UE joint” of UEE Joint Co., Ltd. can be used.
When a joint having an expansion and contraction function is used, a large horizontal displacement can be obtained, and the deformation range of the piping structure 12 for the seismic isolation structure becomes large. Therefore, when there is no problem in the deformation range of the seismic isolation structure piping structure 12, it is not necessary to use a joint having an expansion / contraction function, and when it is desired to increase the deformation range of the seismic isolation structure piping structure 12, for example, When using a joint having an expansion and contraction function as the first joint 32 and further increasing the deformation range, when using a joint with an expansion and contraction function as the first joint 32 and the second joint 34 and further expanding the deformation range, As the first to third joints 32, 34, 40, joints having an expansion / contraction function may be used.
[0008]
The end portion 22A of the lower structure side pipe 22 is connected to the joint portion T1 of the first joint 32, and one end of the first pipe body 36 is connected to the joint portion T2 of the first joint 32.
Further, an end portion 24A of the upper structure side pipe 24 is connected to the joint portion T2 of the second joint 34, and one end of the second pipe 38 is connected to the joint portion T1 of the second joint 34.
[0009]
The first tube 36 and the second tube 38 are both made of metal and extend linearly.
The other end of the first pipe 36 is connected to the joint portion T1 of the third joint 40, and the first pipe 36 extends substantially in the horizontal direction (specifically, extends in the horizontal direction. Or, in the case of a sewer pipe or the like, so as to extend with a certain gradient with respect to the horizontal direction).
Further, one end of a metal elbow 44 is connected to the joint portion T2 of the third joint 40, the other end of the second pipe 38 is connected to the other end of the elbow 44, and the second pipe 38 is substantially in the horizontal direction. (Specifically, extend in the horizontal direction, or in the case of a sewer pipe or the like, so as to extend with a certain gradient with respect to the horizontal). .
Then, as shown by a dotted line in FIG. 1, when viewed in a plan view in a normal state where the building is not moving, the first pipe 36 and the second pipe 38 are bent via the third joint 40 and the elbow 44. In the present embodiment, they are arranged so as to extend in a direction substantially perpendicular to each other (to have a bending angle of about 90 degrees). Note that the bending angle is not limited to 90 degrees.
[0010]
The carriage 42 is configured to be movable in the horizontal direction and to be able to adjust the vertical height of the third joint 40 while supporting the weight of the third joint 40. Strictly speaking, the carriage 42 supports not only the weight of the third joint 40 but also a part of the weight of the elbow 44, the first pipe 36, the second pipe 38, and the like, and furthermore, the piping for the seismic isolation structure. The weight of the structure 12 is supported.
The carriage 42 supports the mounting plate 4202 on which the third joint 40 is mounted and fixed, an intermediate plate 4204 that supports the mounting plate 4202 so that the vertical height can be adjusted, and supports the intermediate plate 4204 so as to be able to absorb shock. A substrate 4206 and a moving unit 4208 provided on the substrate 4206 are provided.
In the present embodiment, rods 4210 are erected and fixed at the four corners of the substrate 4206, respectively, and the rods 4210 are inserted into the four corners of the intermediate plate 4204 and the mounting plate 4202 so as to be slidable up and down.
[0011]
Four disc springs 4212 (elastic material) are provided on each rod 4210 portion of the substrate 4206 and the intermediate plate 4204, respectively, so that the intermediate plate 4204 can be vertically moved and elastically supported on the substrate 4206. Like that. A nut 4214 for preventing the rod 4210 from coming off upward is screwed into the male screw of the rod 4210 protruding below the substrate 4206. Also, a nut 4216 is screwed into a male screw of each rod 4210 on the upper surface of the intermediate plate 4204, and the upper and lower heights of the rod 4210 with respect to the intermediate plate 4204 are determined by the lower surface of the nut 4216 hitting the upper surface of the intermediate plate 4204. It is configured.
Further, nuts 4218 are screwed into male screws of the respective rods 4210 on the upper surface and the lower surface of the mounting plate 4202, and the height of the mounting plate 4202 with respect to the rod 4210 is determined by tightening the nuts 4218. ing.
The moving means 4208 is composed of a case 4208A attached to the lower surface of the substrate 4206 and a rigid ball 4208B rotatably mounted on the case 4208A, and is a thin flat metal plate such as stainless steel set on a foundation. It is arranged on a plate portion 4208C made of.
The plate portion 4208C is provided so that the carriage 42 can be smoothly moved. Depending on the configuration of the moving means 4208, a concrete member, a synthetic resin member, or a wooden member can be used. When the place where the carriage 42 is arranged is a flat place, the plate portion 4208C is omitted.
The imaginary line (a) in FIG. 1 shows the moving range of the third joint 40, that is, the moving range of the bogie 42, due to the deformation of the seismic isolation structure piping structure 12, and the plate portion 4208C corresponds to this moving range. The size and shape are provided.
[0012]
Next, the operation will be described.
When the seismic isolation device is activated and a relative displacement occurs in the horizontal direction between the foundation and the building 14 during an earthquake or the like, the piping structure 12 for the seismic isolation structure is changed from the state shown by the dotted line to the state shown by the solid line in FIG. Changes to
Here, considering that the end 24A of the upper structure side pipe 24 has moved in the horizontal direction with reference to the end 22A of the lower structure side pipe 22 (without moving the end 22A of the lower structure side pipe 22), In one joint 32, the joint T2 swings with respect to the joint T1, and the joint T2 itself expands. Then, due to the swing of the joint T2 with respect to the joint T1 and the extension of the joint T2 itself, the first pipe 36 swings around the swing center of the first joint 32 as a fulcrum and moves in the extension direction.
In the second joint 34, the second joint 34 itself moves in the horizontal direction, the joint T1 swings with respect to the joint T2, and the joint T2 itself expands. The movement of the second joint 34 itself, the swing of the joint T1 relative to the joint T2, and the extension of the joint T2 itself cause the second pipe 38 to swing about the swing center of the second joint 34 as a fulcrum, and Move in the extension direction.
Due to the swing and movement of the first joint 32, the second joint 34, the first tube 36, and the second tube 38, the third joint 40 itself moves in the horizontal plane at the third joint 40. Also, the elbow 44 itself moves. Further, the joint T1 and the joint T2 relatively swing, and the joint T2 itself expands.
As described above, the bending angle formed by the first pipe 36 and the second pipe 38 changes, and the relative displacement between the foundation and the building 14 is absorbed by the change in the bending angle. The deformation of the structure piping structure 12 absorbs the relative displacement between the foundation and the building 14.
[0013]
Next, effects will be described.
In the seismic isolation structure piping structure 12 of the present embodiment, the third joint 40 is moved smoothly and quickly by the movement of the bogie 42 at the time of relative displacement between the foundation and the building 14. The bending angle formed by the first pipe 36 and the second pipe 38 also changes smoothly, and the piping structure 12 for the seismic isolation structure can be deformed smoothly, so that a large relative displacement between the foundation and the building 14 is generated. However, it is possible to absorb the deformation of the piping structure 12 for the seismic isolation structure without generating excessive force, which is advantageous in increasing the durability of the piping structure 12 for the seismic isolation structure.
Further, the piping structure 12 for the seismic isolation structure includes a first pipe body 36 and a second pipe body 38 extending in a substantially horizontal direction, in addition to the first joint 32, the second joint 34, and the third joint 40. Since it is configured and does not require piping extending in the vertical direction, it can be installed in a location where piping space cannot be secured in the vertical direction.
In the present embodiment, the flat plate portion 4208C is installed, and the moving means 4208 is moved on the flat plate portion 4208C. Therefore, the movement of the third joint 40 is smoothly and quickly performed, and the piping structure for the seismic isolation structure is provided. 12 is more advantageous in increasing the durability.
Further, in the present embodiment, since the third joint 40 is elastically supported on the trolley 42 via the disc spring 4212, an impact generated at the time of relative displacement between the foundation and the building 14 is generated by the disc spring 4212. Therefore, the impact on the third joint 40 and the impact on the entire piping structure 12 for the seismic isolation structure can be alleviated, which is advantageous in preventing damage to the joint itself and the pipe joint. This is also advantageous in preventing the bolts of the parts from being loosened, and is even more advantageous in increasing the durability of the seismic isolation structure piping structure 12.
[0014]
The members and components (the first joint 32, the second joint 34, the third joint 40, the elbow 44, the first pipe 36, and the second pipe 38) constituting the piping structure 12 for the seismic isolation structure are carts. Since all commercially available products except for 42 can be used, they can be assembled inexpensively, which is advantageous in terms of cost, and also excellent in reliability.
In addition, the members and components (the first joint 32, the second joint 34, the third joint 40, the elbow 44, the first pipe 36, and the second pipe 38) constituting the piping structure 12 for the seismic isolation structure are mounted on a bogie. Since all the members except 42 are made of metal, they have excellent durability compared to a rubber piping structure, and are therefore suitable for passing a high-temperature liquid or a high-pressure liquid.
Further, in the case of a sewer pipe or the like, the pipe must be provided with a predetermined gradient with respect to the horizontal direction, and a gradient adjustment operation on site is required. It has the function of adjusting the height of the third joint 40 while supporting the weight of the seismic isolation structure piping structure 12, and allows the worker to simply use the nut 4218 without temporarily supporting the weight of the seismic isolation structure piping structure 12. By adjusting the height of the mounting plate 4202 with respect to the intermediate plate 4204 by loosening and tightening, the height of the third joint 40 can be easily adjusted, so that the slope adjustment work on site can be easily performed.
Therefore, especially when the first tube 36 and the second tube 38 are thick and heavy, the gradient adjustment of the first tube 36 and the second tube 38 in a state where the first tube 36 and the second tube 38 are mounted on the carriage 42 without holding them. This is advantageous in that the on-site gradient adjustment operation can be performed extremely efficiently.
Further, since the first joint 32, the second joint 34, and the third joint 40 having the expansion and contraction function are used, the relative displacement between the foundation and the building 14 can be achieved without increasing the size of the seismic isolation structure piping structure 12. Accordingly, the piping structure 12 for the seismic isolation structure can be smoothly deformed in a larger range, which is advantageous in reducing the size of the piping structure 12 for the seismic isolation structure.
[0015]
Next, a second embodiment of the carriage 42 will be described.
FIG. 2B shows a front view of the second embodiment of the bogie. In the following description, the same parts and members as those of the carriage 42 in FIG.
In the truck 42A of the second embodiment, the configuration of the moving means 4208 is different from the truck 42 of FIG.
That is, the moving means 4208 is constituted by caster wheels 4208D attached to the lower surface of the substrate 4206, and the caster wheels 4208D are arranged to roll on the plate portion 4208C.
Even if such a truck 42A is used in place of the truck 42, the same effect as described above can be obtained in the piping structure 12 for the seismic isolation structure.
[0016]
Next, a third embodiment of the carriage 42 will be described.
FIG. 3A shows a front view of a third embodiment of the bogie.
In the truck 42B of the third embodiment, the configuration of the moving means 4208 is different from the truck 42 of FIG.
That is, the moving means 4208 is constituted by a sliding bearing 4208E attached to the lower surface of the substrate 4206, and the sliding bearing 4208E is made of metal or synthetic resin, and is provided so as to slide on the plate portion 4208C. I have.
Even if such a trolley 42B is used in place of the trolley 42, the same effect as described above is exerted in the piping structure 12 for the seismic isolation structure.
[0017]
Next, a fourth embodiment of the carriage 42 will be described.
FIG. 3B shows a front view of the fourth embodiment of the bogie.
In the truck 42C of the fourth embodiment, the configuration of the disc spring 4212 (elastic material) is different from that of the truck 42D in FIG.
That is, in the carriage 42C, a rubber plate 4212A is used instead of the disc spring 4212 as an elastic material. The third joint 40 is elastically supported by the rubber plate 4212A, and the impact is reduced by the rubber plate 4212A.
Even if such a trolley 42C is used in place of the trolley 42, the same effect as described above is achieved in the piping structure 12 for the seismic isolation structure.
In the description of the cart, the case where the disc spring 4212 or the rubber plate 4212A is used as the elastic material has been described, but another elastic material such as a coil spring may be used as the elastic material.
[0018]
【The invention's effect】
As described above, according to the present invention, an inexpensive seismic isolation structure that can be arranged when piping space cannot be secured in the vertical direction and that can smoothly deform following the relative displacement between the lower structure and the upper structure. A piping structure is obtained.
[Brief description of the drawings]
FIG. 1 is a plan view of a piping structure according to a first embodiment.
FIG. 2A is a front view of a first embodiment of the bogie, and FIG. 2B is a front view of a second embodiment of the bogie.
FIG. 3A is a front view of a third embodiment of the trolley, and FIG. 3B is a front view of a fourth embodiment of the trolley.
[Explanation of symbols]
12 Piping structure for seismic isolation structure 22 Lower structure side pipe 24 Upper structure side pipe 32 First joint 34 Second joint 36 First pipe 38 Second pipe 40 Third joint 42 Bogie

Claims (5)

An upper structure is supported through a seismic isolation device with respect to a lower structure of the structure, a lower structure-side pipe is provided in the lower structure, and an upper structure-side pipe is provided in the upper structure. A seismic isolation structure piping structure for connecting an end of the separated lower structure side piping and an end of the upper structure side piping,
A first joint connected to an end of the lower structure-side piping;
A second joint connected to an end of the upper structure side pipe;
A first pipe having one end connected to the first joint;
A second pipe having one end connected to the second joint;
A third joint connecting the other end of the first tube and the other end of the second tube;
A truck on which the third joint is mounted,
The first, second and third joints are constituted by universal joints,
The first tube and the second tube are connected in a bent shape via the third joint when viewed in a plan view,
The trolley is configured to be movable in a horizontal direction so that the vertical height of the third joint can be adjusted. The piping structure for a base-isolated structure according to claim 1, wherein the carriage is moved on a flat plate portion. The piping structure for a base-isolated structure according to claim 1, wherein the third joint is supported on the bogie via an elastic material. The piping structure for a seismic isolation structure according to claim 1, wherein at least one of the first, second, and third joints has an expansion / contraction function. An elbow that bends the axis of the two pipes by 90 degrees to be connected to the third joint is connected, and the first pipe and the second pipe each extend linearly and are viewed in plan. 2. The seismic isolation device according to claim 1, wherein the first pipe and the second pipe are arranged so that their extending directions are substantially orthogonal via the third joint and the elbow. Piping structure for structures.

Images