JP2000065254A - Piping holding structure of base-isolated building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping holding structure which can prevent the damage to piping in an earthquake in a building having a base-isolated structure. SOLUTION: One end of a connecting pipe 1 is connected through a pipe 3b fixed to a base isolated structural building side, and a flexible and expansible fitting 2b. The other end of the connecting pipe 1 is connected through a pipe 3a fixed to a foundation side, and a flexible and expansible coupling 2a. To either one side of the foundation and the base-isolated building, a rotary shaft 7 is installed, and an arm 8 is pivoted rotatable to the rotary shaft 7. A slider 9 slidable along the arm 8 is installed to the arm 8, while the connecting pipe 1 is connected to the slider 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe holding structure for a building having a seismic isolation structure.

[0002]

2. Description of the Related Art Attention has been paid to a building having a seismic isolation structure in which a seismic isolation device is used to reduce the shaking of the building itself during an earthquake. FIG. 13 is a diagram showing a concept of a seismic isolation mechanism of a building having a seismic isolation structure. (A) shows a normal state, and (B) shows a state at the time of an earthquake. Land (a)
Even if there is a vibration, the vibration of the building (a) itself is suppressed by the function of the seismic isolation device (c), and the collapse or the like can be avoided.

[0003]

However, since the relative position between the land and the building changes relatively, the gas from the land to the building can be used even if the building itself is not damaged.
Piping for electricity, water and sewage, etc. will be damaged,
There is a risk of causing a danger such as a short circuit, and a large amount of time and labor is required to repair underground piping.

Therefore, in a building having such a seismic isolation structure, there is a demand for means for preventing damage to the piping during an earthquake.

[0005]

According to a first aspect of the present invention, there is provided a pipe holding structure for a seismic isolation structure building, wherein one end of a connecting pipe (1) is connected to a pipe (3b) fixed to the seismic isolation structure building (a) side. It is connected via a flexible and stretchable joint (2b), and the other end of the connection pipe (1) has flexibility and stretchability with the pipe (3a) fixed to the base (a) side. Connected via a joint (2a) having a rotating shaft (7) attached to either the foundation (a) or the base-isolated building (a), and attached to the rotating shaft (7). Is an arm
(8) is pivotally connected to the arm (8), and a slider (9) slidable along the arm (8) is attached to the arm (8). The pipe (1) is connected.

According to this, even if the relative positional relationship between the land and the seismically isolated building changes due to the earthquake, the piping (3a),
(3b) is connected to the joints (2a) and (2b) having flexibility and elasticity, so that the joints (2a) and (2b) are deformed so that the pipes (3a) and (3b) are strong. It can prevent the force from being applied. This can prevent the pipes (3a) and (3b) from being damaged during an earthquake.

A connecting pipe (1) located between the two joints (2a) and (2b) is connected to and held by a slider (9).
The slide of the slider (9) with respect to (8) and the rotation of the arm (8) about the rotation axis (7) allow the slider (8) to move freely within the arm rotation plane. Therefore, the joint
Even if the connecting pipe (1) moves due to the deformation of (2a) and (2b), the slider (9) can continue to hold the connecting pipe (1).

According to a second aspect of the present invention, there is provided a pipe holding structure for a seismic isolation structure building, wherein the guide section (11) for supporting an end of the arm (8) on the opposite side to the rotating shaft is provided. , (1
2).

According to this, the weight applied to the arm (8) can be distributed to the rotating shaft (7) and the guide portions (11) and (12), so that the pipes (3a) and (3b) and the joint ( Even when 2a) and (2b) are heavy, sufficient strength can be obtained.

According to a third aspect of the present invention, there is provided a pipe holding structure for a seismic isolation structure building according to the first or second aspect, wherein the connecting pipe (1) and the slider (9) rotate the arm (8). It is characterized in that it is connected via a connecting member (14) which can be extended and contracted in a direction perpendicular to the direction.

According to a fourth aspect of the present invention, in the pipe holding structure for a seismic isolation structure building, the arm (8) can swing in a direction perpendicular to the rotating direction. There is a feature.

According to these, the connecting pipe (1) moves not only in the rotating direction of the arm (8) but also in the direction perpendicular thereto by the expansion and contraction of the connecting member (14) or the swing of the arm (8). be able to. Therefore, it is possible to cope with vertical vibration to some extent.

[0013]

[First Embodiment] FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a front view of the present embodiment. FIG. 3 is an enlarged plan view of a main part of the present embodiment, FIG. 4 is an enlarged front sectional view of a main part of the present embodiment, and FIG.

(4) is a pipe fixing part on the foundation side, to which the pipe (3a) on the foundation side is attached. (5) is a pipe fixing part on the bottom side of the building, to which the pipe (3b) on the building side is attached. (4a) and (5a) are piping (3a) and (3b) are piping fixing parts
U bolts for fixing to (4) and (5).

(1) is a connecting pipe, which is L-shaped and has flanges at both ends. (2a) and (2b) are joints having elasticity and flexibility. The connection pipe (1) is connected to the building-side pipe (3b) via a joint (2b), and the other end of the connection pipe (1) is connected to the foundation-side pipe (3a) via a joint (2a). Is connected to

(7) A building (A) with a rotating shaft mounting part (6)
Is a rotating shaft attached to the bottom of the. (8) is an arm rotatably attached to the rotating shaft. Therefore,
The arm (8) can rotate on a plane substantially horizontal to the bottom of the building.

(9) is a slider which can be moved along the arm (8), and has two roller portions abutting on the upper and lower surfaces of the arm (8) so as to be able to move smoothly with respect to the arm (8). (9a).

Reference numeral (10) denotes a connecting pipe slider connecting body for connecting the slider (9) and the connecting pipe (1), and has a level adjuster function for finely adjusting the height of the connecting pipe (1). ing. (10a) is a U-bolt for fixing the connecting pipe (1).

When the relative positional relationship between the land (a) and the seismically isolated building (a) changes during an earthquake, the piping (3)
The joints (2a) and (2b) having flexibility and elasticity are deformed so that no force is applied to (a) and (3b). The connecting pipe (1) moves due to the deformation of the joints (2a) and (2b). Since the connecting pipe (1) is connected to the slider (9) via the connecting pipe slider connecting body (10), the slider (9) moves as the connecting pipe (1) moves.

The slider (9) slides with respect to the arm (8), and rotates the arm (8) about the rotation axis (7).
It can move freely in the plane of rotation of the arm. Therefore, the slider (9) follows the movement of the connecting pipe (1) and
(1) can be maintained.

[Embodiment 2] This embodiment is an embodiment particularly suitable when the weight of the pipe to be supported is large. The basic configuration is the same as that of the first embodiment, except that a guide portion for supporting the vicinity of the end opposite to the rotation axis of the arm is provided to distribute the weight of the pipe.

FIG. 6 is a plan view of the present embodiment, FIG. 7 is a front view of the present embodiment, and FIG. 8 is an enlarged sectional view of a main part of the present embodiment. (1
1) is an arc-shaped guide groove, which is attached to the bottom of the building (A). A roller member (12) is attached to an end of the arm (8) opposite to the rotation shaft (7). The details of the roller member (12) are shown in FIG.
And a connecting member (12c) for connecting these.

With such a structure, the pipes and joints (2a), (2)
b) The weight of the connecting pipe (1) can be distributed to the rotating shaft (7) and the guide groove (11). Since the guide groove (11) is arranged in an arc around the rotation shaft (7), the end of the arm (8) can be always supported even when the arm (8) rotates. Therefore, sufficient mechanical strength can be maintained even when the weight of the joints (2a) and (2b) is large.

In this embodiment, an arc-shaped guide groove and a roller running in the guide groove are used as the guide portion. However, the structure of the guide portion is not limited to this. For example, a planar guide plate or a guide may be used. A rail and a caster that can move on the rail may be used.

[Embodiment 3] FIG. 9 is a front view of this embodiment, and FIG. 10 is an enlarged sectional view of a connection portion between a connection pipe and a slider.

The first embodiment and the second embodiment correspond to the movement in the horizontal direction (the rotation surface of the arm).
It is designed to respond to vertical shaking.

The slider (13) is connected to the connecting pipe slider connector (1).
Although connected to the connection pipe (1) via 4), the connection pipe slider connection body (14) is provided with a coil spring (14a).

In a normal state, the position where the spring (14a) and the weight applied to the connecting pipe slider connecting body (14) are balanced is the connecting pipe (1).
Up and down position. At the time of vibration, the coil spring (14a) expands and contracts in accordance with the vertical vibration of the connection pipe (1). Therefore, it is possible to cope with the vertical vibration in the expansion and contraction range of the coil spring (14a).

[Embodiment 4] FIG. 11 is a front view of this embodiment. This embodiment also responds to vertical swing as in the third embodiment. However, in contrast to Embodiment 3 in which the connecting portion between the connection pipe (1) and the slider (13) can be expanded and contracted, in this embodiment, the arm (8) can be rotated also in the vertical direction. Is supported.

More specifically, a rotating shaft fixed to the bottom of a building
A rotating body (15) is rotatably attached to (7).
The rotating body (15) has a swing shaft (16).
The arm (8) is attached to (16).

Thus, the arm (8) has a predetermined range around the oscillating shaft (16) in a direction perpendicular to the direction of rotation of the rotating body (15) (a plane substantially horizontal to the bottom surface of the building (A)). To swing (swing). (17) is a spring member for supporting the arm (8) so that the arm (8) is substantially horizontal in a normal state.

In the event of an earthquake, even if the connecting pipe (1) vibrates up and down, it can be dealt with by swinging the arm (8) to which the slider (9) is attached in the vertical direction.

[Embodiment 5] In the above Embodiments 1 to 4, the case where the rotary shaft is provided at the bottom of the building (A) has been described as an example, but the rotary shaft (7) is provided on the foundation (A). May be. The present embodiment is an embodiment in such a case, and FIG. 12 shows a front view of the present embodiment.

In the first to fourth embodiments, the connecting pipe (1) is held so as to be hung from above, whereas in this embodiment, the connecting pipe (1) is held so as to be supported from below. Will be. (18) is a connecting pipe slider connecting body, which supports the connecting pipe (1) from below so that the joints (2a) and (2b) are substantially horizontal at normal times by a compression spring. Also in this embodiment, the connecting pipe is connected by the expansion and contraction of the compression spring of the connecting pipe slider connecting body (18).
It can respond to the vertical vibration of (1).

[0035]

As described above, according to the present invention, in a building having a seismic isolation structure, it is possible to provide a piping holding structure capable of preventing damage to piping even in the event of an earthquake.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment.

FIG. 2 is a front view of the first embodiment.

FIG. 3 is an enlarged plan view of a main part of the first embodiment.

FIG. 4 is an enlarged front sectional view of a main part of the first embodiment.

FIG. 5 is an enlarged side sectional view of a main part of the first embodiment.

FIG. 6 is a plan view of a second embodiment.

FIG. 7 is a front view of the second embodiment.

FIG. 8 is an enlarged sectional view of a main part of the second embodiment.

FIG. 9 is a front view of a third embodiment.

FIG. 10 is an enlarged sectional view of a main part of a third embodiment.

FIG. 11 is a front view of a fourth embodiment.

FIG. 12 is a front view of the fifth embodiment.

FIG. 13 is a schematic diagram of a general seismic isolation building.

[Explanation of symbols]

 (A) Building (a) Foundation (1) Connection pipe (2a), (2b) Joint (3a) Piping (foundation side) (3b) Piping (building side) (4) Pipe fixing part (foundation side) ( 5) Pipe fixing part (building side) (6) Rotating shaft mounting part (7) Rotating shaft (8) Arm (9) Slider (10) Connecting pipe slider connector (11) Guide groove (12) Roller member (16 ) Swing axis

Claims (4)

[Claims] 1. One end of a connecting pipe is connected to a pipe fixed on the seismic isolation structure building side via a joint having flexibility and elasticity, and the other end of the connecting pipe is fixed on a foundation side. And a flexible shaft, and a flexible and stretchable joint. A rotating shaft is attached to either the foundation or the base-isolated structure, and the arm is rotated around the rotating shaft. Characterized in that the arm is provided with a slider slidable along the arm, and the connecting pipe is connected to the slider. Retention structure. 2. The piping holding structure of a seismic isolation structure building according to claim 1, further comprising a guide portion for supporting an end of the arm opposite to the rotation axis. 3. The seismic isolation device according to claim 1, wherein the connecting pipe and the slider are connected via a connecting member that can expand and contract in a direction perpendicular to the rotation direction of the arm. Structural building piping retention structure. 4. The piping holding structure of a seismic isolation structure building according to claim 1, wherein the arm can swing in a direction perpendicular to the rotation direction.