JP2000297879A - Piping structure for base-isolated superstructure, and building provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping structure for a base-isolated superstructure, and a building provided with the same which can be executed at low cost without requiring a large underfloor height, underfloor plane, or in-feed space, or without setting limitation to design of the superstructure. SOLUTION: In this piping structure, a pipe member connected to a base- isolated superstructure 2 at one end and connected to a foundation 1 is piped. In this case, a wire 7 is stretched along an underfloor surface 3 in a both-end supported condition at an underfloor part of the base-isolated superstructure 2, a suspension member 14 engaged with the wire 7 in an extension direction of the wire 7 to be capable of displacement is suspended by the wire 7, and a middle part 12 between tube members 10, 11 having flexibility are suspended and supported by the suspension member 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure for a seismic isolation building and a building provided with the piping structure, and more particularly to a piping structure of equipment piping for water supply, cold / hot water, drainage, etc. in a seismic isolation building. It is about.

[0002]

2. Description of the Related Art Laminated rubber bearings for buildings such as detached houses,
Rolling bearings, sliding bearings, etc. are used to support relative displacement from the foundation, preventing seismic energy from acting on buildings.
Attempts to mitigate and prevent collapse of buildings due to earthquakes have already been made in various forms, and buildings supported in this way are referred to as base-isolated buildings (base-isolated buildings). In equipment piping for water supply, cold / hot water, drainage, etc. in seismic isolation buildings as described above,
Pipes with one connected to the base-isolated building and the other connected to the foundation side are designed to be compatible with the base-isolated building, i.e., follow the relative displacement between the building and the base due to an earthquake. It is necessary to do so that the pipe material is not damaged such as cracks or breakage.

[0003] As a piping structure for a seismic isolation building, two pipe members, such as rubber and stainless steel, which are referred to as flexible seismic isolation joints, are arranged in directions perpendicular to each other when viewed in a horizontal plane. The two flexible pipes are connected to each other by an elbow joint, and the elbow joint is suspended and supported directly from the lower surface of the building by the suspender. A so-called pedestal system is known in which flexible tubing is connected to each other by an L-shaped piping unit, and the L-shaped piping unit is mounted on a seismic isolation stage (a gantry) in a free state (Japanese Patent Laid-Open No. Hei 9 (1999)). -303616).

[0004]

In the suspension type, the displacement is absorbed by the deformation of the flexible tube and the pendulum-like displacement of the suspension around a connection point with the lower surface of the building floor. Therefore, a relatively long suspension is required for sufficient displacement absorption, a large installation space (height under the floor) is required, and a great constraint is imposed on the building design. On the other hand, the pedestal type does not require much under-floor height, but requires a large installation space (under-floor plane) to install the seismic isolation stage, and imposes great restrictions on building design. become. Also, special space may be required to carry the seismic isolation stage below the floor, which again imposes significant constraints on building design.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and does not require a large underfloor height, a flat underfloor, and a carry-in space, and does not impose restrictions on a building design. Moreover, an object of the present invention is to provide a piping structure for a seismic isolation building that can be implemented at low cost and a building provided with the piping structure.

[0006]

In order to achieve the above object, a piping structure for a base-isolated building according to the first aspect of the present invention has one connected to a base-isolated building and the other connected to a foundation side. In a piping structure for a seismic isolation building that connects connected pipes, a wire is stretched along a lower surface of the floor in a state where both ends are supported at a lower portion of the floor of the seismic isolation building, and the wire extends along the extending direction of the wire. A suspending tool displaceably engaged with the wire is suspended from the wire, and the intermediate portion of a flexible tube is suspended and supported by the suspending tool. According to this configuration, the displacement can be smoothly absorbed by the bending deformation of the flexible tube (flexible tube) and the displacement of the suspension along the wire in the wire extending direction following the bending. Will be

According to a second aspect of the present invention, there is provided a piping structure for a base-isolated building, wherein the pipes extend in directions perpendicular to each other as viewed in a horizontal plane, and the two flexible pipes. An elbow joint for connecting the pipe members to each other is provided, and the elbow joint is suspended from the wire by the suspension tool. According to this configuration, regardless of the relative displacement in any direction in the horizontal direction, one or both of the two flexible tubes are bent and deformed, and the displacement of the suspension with respect to the wire following the bent deformation is performed. In conjunction with this, displacement absorption is performed smoothly.

According to a third aspect of the present invention, in the piping structure for a base-isolated building, the pipe is a flexible pipe which is curved in an arc shape. According to this configuration, regardless of the relative displacement in any direction in the horizontal direction, the flexible tubular material having an arcuate shape is bent and deformed, and is coupled with the displacement of the suspension tool with respect to the wire following the bent deformation. In addition, the displacement is smoothly absorbed.

A piping structure for a base-isolated building according to the invention of claim 4 is a piping structure for a base-isolated building, one of which is connected to a base-isolated building and the other is connected to a foundation side. Wherein the tube is a flexible tube, and one end of the flexible tube is directly connected to an underground pipe. According to this configuration, one end of the flexible tube is directly connected to the underground pipe, and the displacement is smoothly absorbed in the direct connection with the underground pipe.

[0010] The piping structure for a base-isolated building according to the invention of claim 5 is a piping structure for a base-isolated building in which one is connected to a base-isolated building and the other is connected to a pipe connected to a foundation side. In the above, the pipe is a flexible pipe, and a one-touch fitting for connection to a building-side or foundation-side pipe is attached to an end of the flexible pipe.

According to this structure, one end of the flexible pipe is directly connected to the underground pipe, and the displacement is smoothly absorbed in the direct connection with the underground pipe. According to a sixth aspect of the present invention, there is provided a building provided with the piping structure for a base-isolated building according to any one of the first to fifth aspects. According to this configuration, a large underfloor height, underfloor plane, and carry-in space are not required, and it is possible to avoid imposing restrictions on a building design.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. (Embodiment 1) FIGS. 1 and 2 show Embodiment 1 of a piping structure for a base-isolated building according to the present invention. In these figures, reference numeral 1 denotes a foundation, and 2 denotes a base-isolated building supported on a base 1 by a known base-isolation supporting device (not shown).

[0013] On the lower floor 3 of the base-isolated building 2, L-shaped steel or H
A rectangular rigid support frame 4 made of a welded joint of a section steel is fixed by bolts or the like. U-tubes 5 and 6 for wire locking are fixedly attached to both ends of the support frame 4, and both ends of a steel wire 7 are connected to the U-tubes 5 and 6 for wire locking by retaining rings 8 and 9. Have been. Thereby, the wire 7
Is supported at the lower part of the floor of the base-isolated building 2,
Is stretched in a substantially horizontal direction.

In the lower part of the floor, two flexible tubes (hoses) 10 and 11 extending in directions perpendicular to each other (for example, east-west and north-south directions) as viewed in a horizontal plane, and the two flexible tubes A support pipe made of an elbow joint 12 for connecting the sex pipes 10 and 11 to each other is arranged. The flexible tubing material 10 connected to the pipe on the foundation 1 side as viewed from the elbow joint 12 is arranged in a direction substantially along the extending direction of the wire 7 and is connected to the pipe on the seismic isolation building 2 side. The sex tube material 11 is arranged in a direction substantially orthogonal to the extending direction of the wire 7.

A pulley 13 is slidably engaged with the wire 7 along the direction in which the wire 7 extends (the left-right direction in the figure), and the upper end of a suspension 14 is connected to the pulley 13. An elbow band 15 is connected to the lower end of the suspension device 14 so as to be able to turn horizontally.
An elbow joint 12, which is an intermediate portion of the elbow 11, is fixedly supported. Thereby, the elbow joint 12 is suspended and supported by the wire 7 via the suspension 14 suspended by the wire 7. In the case of a drainage pipe, a water gradient of about 1/100 to 1/50 is also applied to the support pipe.

According to the above-described structure, when a horizontal relative displacement occurs between the foundation 1 and the base-isolated building 2 due to the earthquake, the flexible tubing 10, 1 according to the relative displacement direction.
One or both of them are bent and deformed, and the suspension 14 is displaced with respect to the wire 7 along the wire extending direction following the bent deformation, so that the relative displacement is absorbed. As a result, it is possible to absorb the relative displacement during a large earthquake of about ± 20 cm with less underfloor space (vertical space) than the conventional suspension type without damaging the piping. it can. Also, a large flat space is not required as compared with the gantry type. In this case, the displacement of the suspension device 14 with respect to the wire 7 is smoothly performed with low frictional resistance by sliding of the pulley 13.
Is also reduced.

(Embodiment 2) FIG. 3 shows Embodiment 2 of a piping structure for a base-isolated building according to the present invention. In FIG. 3, the portions corresponding to those in FIG. 2 are denoted by the same reference numerals as those in FIG. 2, and the description thereof will be omitted. In the second embodiment, wire stoppers 17 and 18 are directly attached to the lower surface 3 of the base-isolated building 2 with screws or the like, and both ends of the wire 7 are connected to the wire stoppers 17 and 18 by retaining rings 8 and 9. Have been. In order to maintain the strength, the mounting positions of the wire fasteners 17 and 18 are selected at the positions of the joists 19 and beams of the base-isolated building 2. The suspension 14 is displaceably engaged with the wire 7 by a ring-shaped member 20 such as a carabiner through which the wire 7 is passed instead of the pulley 13.

The second embodiment is a simplified type of the first embodiment. In the second embodiment, too,
When a relative displacement in the horizontal direction occurs between the base material and the seismic isolation building 2, both or one of the flexible pipes 10 and 11 bends and deforms in accordance with the relative displacement direction, and the suspension follows the bend deformation. The tool 14 is displaced with respect to the wire 7 along the wire extending direction due to the sliding of the ring-shaped member 20, and the relative displacement is absorbed.

Therefore, even in the second embodiment, the piping is damaged even with a relative displacement at the time of a large earthquake of about ± 20 cm with a smaller underfloor space (vertical space) than the conventional suspension type. Can be absorbed without giving. Also, a large flat space is not required as compared with the gantry type.

(Embodiment 3) FIGS. 4 and 5 show Embodiment 3 of a piping structure for a base-isolated building according to the present invention. 4 and 5, parts corresponding to those in FIGS. 1 to 3 are given the same reference numerals as those in FIGS.
The description is omitted. In the third embodiment, the support pipe is formed of a flexible tube 21 curved in an arc shape in a horizontal plane, and an intermediate portion of the flexible tube 21 is connected to the fastening band 22 of the suspension 14 suspended from the wire 7. Fixed and suspension 14
Is suspended from the wire 7. Intermediate portion of flexible tube 21 (portion fixed by fastening band 22)
The part connected to the pipe on the side of the foundation 1 is arranged in a direction substantially along the extending direction of the wire 7, and the part connected to the pipe on the side of the seismic isolation building 2 is the extending direction of the wire 7. Are arranged in a direction substantially orthogonal to.

According to the above-described configuration, when a horizontal relative displacement occurs between the foundation 1 and the base-isolated building 2 due to an earthquake, the flexible tube 21 bends and deforms in accordance with the relative displacement direction. Then, the suspension 14 is displaced relative to the wire 7 along the wire extending direction following the bending deformation, and the relative displacement is absorbed. Thereby, also in the third embodiment,
With less underfloor space (vertical space) than a conventional suspension type, relative displacement during a large earthquake of about ± 20 cm can be absorbed without damaging the piping. Also, a large flat space is not required as compared with the gantry type.

(Embodiment 4) FIG. 6 shows Embodiment 4 of a piping structure for a base-isolated building according to the present invention. In FIG. 6, portions corresponding to FIG. 1 to FIG.
5 are denoted by the same reference numerals as in FIG. 5, and description thereof will be omitted. In the fourth embodiment, a ring-shaped member 23 is attached to the lower end of the suspension device 14 instead of the fastening band 22, and the suspension member 14 causes the flexible tube 21 to extend in the extending direction of the flexible tube 21 by the ring-shaped member 23. It is displaceably supported.

According to this configuration, when a relative displacement in the horizontal direction occurs between the foundation 1 and the base-isolated building 2 due to the earthquake,
The flexible tube 21 bends and deforms in accordance with the direction of the relative displacement, and the suspension 14 is displaced with respect to the wire 7 along the wire extending direction following the bending and deformation.
Is displaced also with respect to the flexible tube material 21, and the relative displacement is absorbed.

Thus, in the fourth embodiment as well, the piping can be installed with less underfloor space (vertical space) than the conventional suspension type, even with respect to the relative displacement during a large earthquake of about ± 20 cm. Can be absorbed without damage. Also, a large flat space is not required as compared with the gantry type.

(Embodiment 5) FIG. 7 shows Embodiment 5 of a piping structure for a base-isolated building according to the present invention. In FIG. 7, the portions corresponding to FIGS.
6 are denoted by the same reference numerals as in FIG. 6, and the description thereof is omitted. In the fifth embodiment, the flexible tubing 1
0 is an underground elbow joint 25 by an elbow joint 24,
It is directly connected to the underground pipe 26. in this case,
If the fixing force due to burial is insufficient, a pipe saddle 27 can be attached to the underground buried pipe 26 as shown in the figure, and the fixing force can be increased by driving a beg 28.

In consideration of corrosion resistance, pipe saddle 2
7. The beg 28 is preferably made of stainless steel or plastics. According to this structure, it can absorb less relative space in the event of a large earthquake of about ± 20 cm with less underfloor space (vertical space) than the conventional hanger type without damaging the piping. In the same manner as the conventional underfloor piping method for a detached house, piping under the floor having no space in the height direction can be advantageously performed, and the cost can be reduced.

(Embodiment 6) FIGS. 8 and 9 show Embodiment 6 of a piping structure for a base-isolated building according to the present invention. In FIGS. 8 and 9, portions corresponding to FIGS. 1 to 7 are denoted by the same reference numerals as those in FIGS. 1 to 7, and description thereof is omitted. In the sixth embodiment, the one-touch fitting 31 is attached to each of the connection end 21a of the mimetic pipe 21 to the building-side pipe 29 and the connection end 21b to the foundation-side (ground side) pipe 30. The joint 31 connects the separable tube 21 to the building-side pipe 29 and connects the separable tube 21 to the foundation-side pipe 30 with one touch.

FIG. 10 shows the detailed structure of the one-touch fitting 31. The one-touch fitting 31 includes a fitting body 33 having a thread part 32 for pipe connection, and a rubber packing 3.
4, a cylindrical in-core 35, and a collet 36. The one-touch fitting 31 is screwed to the end portion 21a or 21b of the greedy tubing 21 with a screw portion 32, and as shown in FIG. By inserting the end of the building side pipe 29 or the foundation side pipe 30,
Simulated tubing 21 and building-side piping 29 or foundation-side piping 3
A liquid-tight connection with 0 is made.

The packing 34 is compressed and elastically deformed by being sandwiched between the building-side pipe 29 or the foundation-side pipe 30 backed by the in-core 35 and the joint body 33, thereby producing a compression sealing effect. The lip portion 34a is strongly pressed against the joint body 33 by acting on the lip portion 34a, thereby producing a self-sealing effect.
Also, the piping (the building-side piping 29 or the foundation-side piping 30) connected to the one-touch fitting 31 is shown in FIG.
As shown by the angle に in FIG. 1, even if inclined, the reseal effect is maintained by the elastic deformation of the packing 34, and the liquid tightness at the joint portion is secured.

The application of the one-touch fitting 31 as described above is not limited to the piping system for water supply as shown in FIGS. 8 and 9, but as shown in FIGS. The same can be applied to a plumbing system for drainage.
In FIGS. 12 and 13, portions corresponding to FIGS. 1 to 11 are denoted by the same reference numerals as those in FIGS. 1 to 11, and description thereof is omitted.

[0031]

As will be understood from the above description, according to the piping structure for a base-isolated building according to the first aspect of the present invention,
In a piping structure for seismic isolation buildings, one of which is connected to the seismic isolation building and the other is connected to the foundation side, the wire runs along the underside of the floor with both ends supported at the lower part of the floor of the seismic isolation building. A suspending tool that is stretched and displaceably engaged with the wire along the extending direction of the wire is suspended from the wire, and the suspending tool suspends and supports an intermediate portion of a flexible tube. Therefore, the displacement absorption is smoothly performed by the bending deformation of the flexible tubing (flexible tubing) and the displacement of the suspension along the wire extending direction of the suspension following the bending deformation, With less underfloor space than conventional products, it can absorb relative displacement during a large earthquake without damaging the piping,
There are no restrictions on building design.

If the suspension is configured to be displaceably engaged with the wire by a pulley slidably engaged with the wire, the suspension slides on the wire by the pulley, and the suspension is moved along the direction of the wire. Displacement with respect to the wire is performed with low frictional resistance, and at the same time, wear of the wire and the like is reduced. When the suspension is configured to be displaceably engaged with the wire by a ring-shaped member such as a carabiner displaceably engaged with the wire, the suspension is displaced relative to the wire in a form in which the wire is passed through the ring-shaped member. In addition, it can be implemented at low cost.

According to the piping structure for a base-isolated building according to the second aspect of the present invention, two flexible pipes whose pipes extend in directions orthogonal to each other when viewed in a horizontal plane, and the two flexible pipes The flexible tube is made of an elbow joint that connects the flexible pipes to each other, and the elbow joint is suspended and supported by a wire by a suspension tool. Either or both of them is bent and deformed, and the displacement is absorbed smoothly in conjunction with the displacement of the suspension with respect to the wire following the bent deformation, and the relative displacement during a large earthquake can be reduced with less underfloor space than the conventional one. On the other hand, it can be absorbed without damaging the piping and does not impose any restrictions on the building design.

According to the piping structure for a base-isolated building according to the third aspect of the present invention, the pipe is made of a flexible pipe which is curved in an arc shape, so that it can be displaced by any relative displacement in the horizontal direction. Even if there is, the flexible tubular material in the shape of an arc is bent and deformed, and in conjunction with the displacement of the suspension with respect to the wire following the bent deformation, the displacement absorption is smoothly performed,
Relative displacement during a large earthquake can be absorbed with less underfloor space than before, without damaging the piping, and there is no restriction on building design.

If the suspension supports the intermediate portion of the flexible tube so as to be displaceable in the direction in which the tube extends, the relative displacement in the horizontal direction between the foundation and the base-isolated building is caused by the earthquake. When this occurs, the flexible tubing bends and deforms in accordance with the direction of the relative displacement, and the suspension is displaced with respect to the wire along the wire extending direction following the bending, and the suspension is flexible. Displacement can be performed smoothly even by displacing the pipe material, and relative displacement during a large earthquake can be absorbed with less space below the floor without damaging the piping as compared with the conventional one.

According to the piping structure for a base-isolated building according to the fourth aspect of the present invention, one is connected to the base-isolated building, and the other is connected to the foundation side for the piping of a pipe connected to the foundation side. In the piping structure, the tube is a flexible tube, and one end of the flexible tube is directly connected to the underground pipe. Absorption is carried out smoothly, and piping under the floor with no space in the height direction can be advantageously performed as in the conventional underfloor piping method of a detached house, and the cost can be reduced.

According to the piping structure for a base-isolated building according to the fifth aspect of the present invention, one of the pipes is connected to the base-isolated building and the other is connected to the foundation side for pipes of a pipe. In the piping structure, the pipe material is a flexible pipe material, and a one-touch fitting for connection with a building-side or foundation-side pipe is attached to an end of the flexible pipe material. The connection between the flexible pipe and the pipe on the building side or on the foundation side can be reliably performed with one-touch by a one-touch fitting, and the number of steps can be reduced.

According to the building provided with the piping structure for a seismic isolation building according to the invention of claim 6, there is no need for a large underfloor height, a flat underfloor, and a carry-in space, and the design of the building is restricted. Can be eliminated.

[Brief description of the drawings]

FIG. 1 is a plan view of a piping structure for a base-isolated building according to a first embodiment of the present invention.

FIG. 2 is a front view of Embodiment 1 of the piping structure for a base-isolated building according to the present invention.

FIG. 3 is a front view of a piping structure for a base-isolated building according to a second embodiment of the present invention.

FIG. 4 is a plan view of Embodiment 3 of the piping structure for a base-isolated building according to the present invention.

FIG. 5 is a perspective view of Embodiment 3 of a piping structure for a base-isolated building according to the present invention.

FIG. 6 is a perspective view of Embodiment 4 of a piping structure for a base-isolated building according to the present invention.

FIG. 7 is a perspective view of Embodiment 5 of a piping structure for a base-isolated building according to the present invention.

FIG. 8 is a plan view of Embodiment 6 of the piping structure for a base-isolated building according to the present invention.

FIG. 9 is a front view of a sixth embodiment of the piping structure for a base-isolated building according to the present invention.

FIG. 10 is a sectional view of a one-touch fitting used in a sixth embodiment of the piping structure for a base-isolated building according to the present invention.

FIG. 11 is a half sectional view showing a pipe connection state of a one-touch fitting used in a sixth embodiment of the piping structure for a base-isolated building according to the present invention.

FIG. 12 is a plan view showing another example of Embodiment 6 of the piping structure for a base-isolated building according to the present invention.

FIG. 13 is a front view showing another example of Embodiment 6 of the piping structure for a base-isolated building according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foundation 2 Seismic isolation building 3 Floor lower surface 4 Support frame 7 Wire 10 and 11 Flexible tube material 12 Elbow joint 13 Pulley 14 Suspension tool 15 Elbow band 20 Ring member 21 Flexible tube material 22 Fastening band 23 Ring member 24 Elbow joint 25 Underground Elbow Joint 26 Underground Pipe 31 Wi-Fitting Joint

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akimune Kohata 2-27-7 Taito, Taito-ku, Tokyo Hitochi Okachimachi Building Patent Equipment Co., Ltd. (72) Inventor Goro Tominaga 3- Negishidai Asaka-shi, Saitama 15-1 Inside Sekisui Chemical Co., Ltd.

Claims (6)

[Claims] 1. A piping structure for a base-isolated building, one of which is connected to a base-isolated building and the other of which is connected to a foundation side, for piping of a base-isolated building. In this state, a wire is stretched along the lower surface of the floor, and a suspending tool that is displaceably engaged with the wire along the extending direction of the wire is suspended from the wire, and a tube material having flexibility by the suspending tool A pipe structure for a base-isolated building, wherein an intermediate portion of the pipe is suspended. 2. The tubing comprises two flexible tubing members extending in directions orthogonal to each other when viewed in a horizontal plane, and an elbow joint connecting the two flexible tubing members to each other. 2. The piping structure for a base-isolated building according to claim 1, wherein the support is suspended from the wire by the suspension tool. 3. The piping structure for a base-isolated building according to claim 1, wherein the pipe member is a flexible tube member curved in an arc shape. 4. A piping structure for a seismic isolation building in which one pipe is connected to a seismic isolation building and the other is connected to a foundation side, wherein the pipe is a flexible pipe. A piping structure for a base-isolated building, wherein one end of a flexible tube is directly connected to an underground pipe. 5. A piping structure for a seismic isolation building in which one of the pipes is connected to a base-isolated building and the other is connected to a foundation side, wherein the pipe is a flexible pipe. A piping structure for a base-isolated building, wherein a one-touch fitting for connection to a building-side or foundation-side pipe is attached to an end of a flexible tube. 6. A building provided with the piping structure for a seismic isolation building according to any one of claims 1 to 5.