JP2000144822A - Base isolation joint for equipped piping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize base isolation in a small space and at low cost by combining pipings fixed to the base isolation side and the base non-isolation side with a flexible pipe, and horizontally movably supporting the required place on the way of the flexible pipe with the base non-isolation side through rolling elements. SOLUTION: For fixing a piping 4 on the base isolation side to a building frame or the like, the end part of the piping 4 is mounted in a supporting hardware 7, and the piping 4 is fixed to the supporting hardware 7 so as to be wound onto the piping 4 with a band-like fixing hardware 8. Meanwhile, for fixing a pipe 5 on the base non-isolation side to a frame 2a, it is fixed similarly to the base isolation side. Next, a flexible pipe 6 having joint flanges 6a, 6a is formed longer than the rectilineal distance between the pipings 4, 6 for insuring a moving portion at movable time due to an earthquake. Next, the flexible pipe 6 is fixed to a supporting hardware fitted with rolling elements such as rollers or casters rolling on a frame 12 thereunder with a bank-like fixing hardware 14. Hereby, the space is small, a large-scaled device is unnecessary, and effective base isolation is made possible at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation joint for piping for equipment such as a drain pipe provided in a seismic isolation building or the like.

[0002]

2. Description of the Related Art In a building, in order to make it a seismic isolation structure, a seismic isolation pit is provided at the foundation of the building, and a seismic isolation device using laminated rubber or the like is provided here. Horizontal displacement is absorbed by this seismic isolation device. Such a seismic isolation device using laminated rubber is effective for buildings in that it has a foundation structure that can cope with displacements of a scale that cannot be accommodated by foundation piles or slab foundations.

However, displacement during an earthquake not only acts on the building frame, but also acts on equipment piping inside and outside the building provided in the building, as a matter of course. In order to ensure the function, it is necessary that the equipment pipes installed between the non-seismic side and the seismic isolated side also have a seismic isolation structure.

[0004] Therefore, various types of seismic isolation joints for making the equipment piping have a seismic isolation structure have been conventionally known. For example, as shown in FIG. There are flexible pipes 21a and 21b connected to both sides of the flexible pipe 21a and 21b, and the elbow pipe 22 is supported by a control suspension 23 suspended from the frame on the base 1 side. ,twenty one
The displacement during an earthquake is absorbed by the flexibility of b and the elasticity of the control suspension 23. In the figure, reference numeral 24 denotes a fixed base fixed to the building side, which is the frame of the seismic isolation side 1, and reference numeral 25 denotes a fixed base fixed to the foundation of the non-seismic side 2.

An example shown in FIG. 8 is basically the same as the example shown in FIG. 7, and is constituted by elbow pipes 22 and flexible pipes 21a and 21b made of seismic isolation rubber connected to both sides thereof. The joint portion is installed on the gantry 26, and absorbs horizontal displacement in the front, rear, left, and right directions on the gantry 26.

In the case where the equipment pipe is a drain pipe, since drainage is performed by natural flow, the drain pipe is provided from the base-isolated side of the building to the non-seismic side of the ground, A water gradient of, for example, 1/50 to 1/100 is provided in the direction.

For this reason, it is necessary to secure this slope at the place of the seismic isolation joint of the drain pipe. As a structure for this purpose, conventionally, for example, as shown in FIGS. There is a tube which is constituted by a tube 27 and supports the entire length of the flexible tube 27 on a frame 28 having a large area having a gradient. The horizontal displacement due to the earthquake in this case is absorbed by forming the flexible tube 27 to be long so as to be displaceable, and by sliding on the gantry 28.

[0008]

Among the above conventional examples, those shown in FIGS. 7 and 8 are flexible pipes 21a,
Because it is a structure that combines two 21b, a large space is required especially for installation of the joint, and the workability is not good.
If the relative displacement of the base-isolated building with the seismic isolation device at the time of the earthquake is ± 30 cm at the maximum, to absorb the large displacement following this, the reaction force at the fixed point will increase, so the fixed base 24 , 25 are also rugged, and there is also the problem that the joints are out of place in light wooden houses.

Further, in the case where the equipment piping is a drain pipe, the diameter of the control suspension 23 and the like must be sufficient to withstand the weight and reaction force of the drain pipe because the diameter becomes large in function. As a result, these members are made into devices, and the whole becomes large-scale and expensive.

When a slope is provided on the gantry 28, it is difficult to provide not only the entire construction but also an accurate slope. In addition, when the earthquake is movable, the entire flexible tube 27 has a large area. Since the pipe moves upward, the pipe gradient changes, and it has been difficult to secure a predetermined gradient.

An object of the present invention is to solve the above-mentioned disadvantages of the prior art, to reduce the space for installation, to reduce the cost without requiring large-scale equipment, and to achieve a sufficient seismic isolation effect even in a small and lightweight wooden house. Can be demonstrated, and when a gradient is provided in the piping,
It is an object of the present invention to provide a seismic isolation joint for equipment piping that can secure a predetermined gradient even during operation and can be used for a drain pipe.

[0012]

According to the present invention, in order to achieve the above object, first, a pipe fixed to the seismic isolation side and a pipe fixed to the non-seismic side are connected by a flexible pipe. The gist is to support a point in the middle of the flexible tube so as to be horizontally movable on the non-seismic side via a rolling element.

Second, the height of the flexible tube is adjustable on a horizontal support base fixed to the non-seismic side.
In addition, the flexible tube is arranged on a horizontal support base via a rolling element having adjustable height legs attached to a lower part. The gist of the present invention is that the drain pipe has a pipe gradient between the drain pipe and the drain pipe.

According to the first aspect of the present invention, since the piping on the seismic isolation side and the piping on the non-seismic isolation side are connected only by the flexible pipe, the structure is simple and the installation space is small. And
It is rich in flexibility when it is moved by an earthquake, and since the key points of this flexible tube move horizontally on the non-seismic side by rolling of the rolling element, it is installed in small and light wooden houses with small reaction force. Can also exert a sufficient seismic isolation effect.

According to the second aspect of the present invention, in addition to the above operation, even when a gradient is provided between the seismic isolation side pipe and the non-seismic side pipe, it is supported by the rolling elements. Since the essential parts of the flexible tube are arranged on a horizontal support base fixed to the non-seismic side while maintaining the arrangement height at a predetermined height,
Not only can you secure the gradient of the flexible tube in normal times,
Since the rolling element moves horizontally on the gantry when it is moved by an earthquake, the horizontal height position of a key point to which the rolling element is attached can be maintained at a predetermined position even when the rolling element is moved, and a predetermined gradient can be secured.

According to the third aspect of the present invention, in addition to the above operation, the height of the flexible tube can be easily adjusted only by adjusting the length of the legs of the rolling element.

According to the fourth aspect of the present invention, in addition to the above-described operation, even in the case of a drain pipe, a predetermined gradient can be secured when the drain pipe is operated by an earthquake, and even if the drain pipe has a large diameter, Since the portion of the flexible tube is horizontally moved by the rolling element, the structure does not need to be large in order to withstand the weight and the reaction force.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of a seismic isolation joint for equipment piping according to the present invention, and FIG. 2 is a partially cutaway side view of the same seismic isolation side and non-seismic side. The seismic isolation side 2 of the installed building or the like is a non-seismic side such as the ground. The seismic isolation joint 3 of the present invention is a pipe 4 such as a drain pipe of the seismic isolation side 1 and a drain pipe of the non-seismic side 2. The two pipes 4 and 5 are connected by a flexible pipe 6 to be disposed between the pipes 5.

The pipe 4 on the seismic isolation side 1 is fixed to the building frame 1a or the like by inserting the end of the pipe 4 into a support metal 7 having a U-shaped cross section fixed to the building frame 1a or the like. The pipe 4 is wound around the fixing metal 8 so that the supporting metal 7
It is done by fixing to.

The foundation or the base 2a of the pipe 5 on the non-seismic side 2
For fixing to the base, a box-shaped support member 9 is disposed on the foundation or the gantry 2a in the same manner as the seismic isolation side, and this support member 9
The pipe 5 is disposed on the base member, and the pipe 5 is wound around a band-shaped fixing member 10 and fixed to the supporting member 9.

When the pipes 4 and 5 are drain pipes, for example, 1/100 to 100/100 between the pipe 4 on the seismic isolation side 1 and the pipe 5 on the non-seismic side 2 in order to allow drainage to flow naturally. A one-fold gradient is provided. Then, pipe flanges 4a and 5a are provided at respective ends of the pipes 4 and 5.

As shown in FIG. 5, for example, the flexible tube 6 has an inner surface of an outer tube made of a hard synthetic resin formed smoothly with a soft synthetic resin, and has connection portions at both ends. 6a, which is longer than the straight line distance between the pipes 4 and 5 and has a margin so as to secure the movement during the movement due to the earthquake, as will be described later.

An arbitrary point in the middle of the flexible tube 6 is
It is movably supported on the non-seismic side 2 via 11. As shown in FIGS. 3 and 4, this support structure has a base 12 installed on the ground which is the non-seismic side 2 and a rolling element 11 such as a roller or a caster that rolls on the base 12 is provided below. Mounting hardware 13
Then, the flexible tube 6 is fixed by a band-shaped fixing hardware 14. The plane area of the gantry 12 is small enough to secure the moving space for the rolling elements 11.

As shown in FIG. 4, the rolling element 11 is rotatably supported by a plurality of ball bearings via a main body 11 as shown in FIG.
The mounting height of the flexible tube 6 on the pedestal 12 is adjusted by assuming that the mounting height can be adjusted with respect to the support hardware 13 having a U-shaped cross section by, for example, a screw-shaped height adjusting leg 11b provided at the upper part of FIG. Form freely. Note that the means for adjusting the height of the flexible tube 6 is not limited to the above-described one, and the support hardware 13 and the pedestal
It is also conceivable to make the twelve heights variable.

As described above, the installation height of the flexible tube 6 on the gantry 12 is adjusted by the height adjusting leg 11b, so that the pipe 4 on the seismic isolation side 1 and the pipe 5 on the non-isolation side 2 are adjusted. Set to a height that can hold the gradient of. Therefore, if the respective pipe flanges 4a and 5a of the pipes 4 and 5 are connected to the joint flange 6a of the flexible pipe 6, the pipes 4 and 5 are connected with the flexible pipe 6 while maintaining a predetermined gradient in normal times. Is done.

In this state, the rolling element
11 supports the frame 12 horizontally slidably.

When an earthquake occurs, as shown in FIG. 6, the rolling elements 11 arranged on the gantry 12 on the non-seismic side 2 move due to the vibration of the earthquake and slide on the gantry 12. At this time,
Since the gantry 12 is installed horizontally, the rolling elements 11 move horizontally, and accordingly, the essential parts of the flexible tube 6 supported by the rolling elements 11 also move while maintaining the horizontal state. . Thereby, the height position of the flexible tube 6 on the gantry 12 does not change, and the gradient between the pipes 4.5 can be maintained at a predetermined level.

Further, since the movement of the flexible tube 6 is performed through the rolling element 11 in combination with the high flexibility, it is smooth.
The reaction force generated at the fixed portions of the pipes 4 and 5 is small, and the seismic isolation effect can be sufficiently exhibited even in a small and light wooden house.

[0029]

As described above, the seismic isolation joint for facility piping according to the present invention has a space for installation because the rolling element is mounted on the flexible tube and slid on the gantry. It requires only a small amount of equipment, requires no large-scale equipment, is low-cost, and has a small reaction force. It can be used for drainage pipes.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a seismic isolation joint for equipment piping of the present invention.

FIG. 2 is a partially cutaway side view showing a seismic isolation side and a non-seismic side showing an embodiment of a seismic isolation joint for equipment piping of the present invention.

FIG. 3 is a partially cutaway side view showing a main part of the embodiment of the seismic isolation joint for facility piping of the present invention.

FIG. 4 is a longitudinal sectional front view of a main part showing an embodiment of a seismic isolation joint for equipment piping of the present invention.

FIG. 5 is a side view of a flexible tube which is a main part of the embodiment of the seismic isolation joint for facility piping of the present invention.

FIG. 6 is an explanatory view of the seismic isolation joint for equipment piping of the present invention when it is in operation, showing an embodiment thereof.

FIG. 7 is a perspective view showing a first example of a conventional seismic isolation joint for facility piping.

FIG. 8 is a plan view showing a second example of a conventional seismic isolation joint for facility piping.

FIG. 9 is a side view showing a third example of a conventional seismic isolation joint for facility piping.

FIG. 10 is a plan view showing a third example of a conventional seismic isolation joint for facility piping.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Seismic isolation side 1a ... Building frame 2 ... Non-seismic side 2a ... Ground or gantry 3 ... Seismic isolation joint 4 ... Piping 5 ... Piping 4a, 5a ... Piping flange 6 ... Flexible pipe 6a ... Joint flange 7 ... Support hardware 8 ... Fixed hardware 9 ... Supported hardware 10 ... Fixed hardware 11 ... Roller 11a ... Main body 11b ... Height adjustment leg 12 ... Stand 13 ... Supported hardware 14 ... Fixed hardware 21a, 21b ... Flexible tube 22 ... Elbow tube 23 ... Control Suspension 24, 25… Fixed stand 26… Stand 27… Flexible tube 28… Stand

Continuing on the front page (72) Inventor Kiichi Shiraishi 118 Furuichi-cho, Maebashi-shi, Gunma Prefecture Inside Daiwa Facility Construction Co., Ltd. (72) Inventor Masayuki Fukuchi 118-Furuichi-cho, Maebashi City, Gunma Prefecture Daiwa Facility Construction Co., Ltd.F-term ( Reference) 2D060 AA03 AC03 AC05 3H104 JA07 JB07 JC09 JD09 LB28 LB37 LG02 MA08

Claims (4)

[Claims] 1. A pipe fixed on the seismic isolation side and a pipe fixed on the non-seismic side are connected by a flexible tube, and a key portion of the flexible tube is connected to the non-seismic side via a rolling element. A seismic isolation joint for equipment piping, characterized in that it is supported horizontally for movement. 2. The seismic isolation joint for equipment piping according to claim 1, wherein the flexible pipe is arranged on a horizontal support base fixed to the non-seismic side so as to be adjustable in height. 3. The piping for equipment piping according to claim 1, wherein the flexible tube is disposed on a horizontal support base via a roller having a height-adjustable leg attached to a lower portion. Seismic isolation fittings. 4. The seismic isolation joint for equipment piping according to claim 1, wherein the pipe is a drain pipe having a pipe gradient between the seismic isolation side and the non-seismic side.