JP4267097B2 - Piping holding structure for seismic isolation structures - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a piping holding structure for a building having a seismic isolation structure.
[0002]
[Prior art]
Buildings with seismic isolation structures that reduce the shaking of the buildings themselves by seismic isolation devices in the event of an earthquake are drawing attention. FIG. 13 is a diagram showing the concept of a seismic isolation mechanism for a building having a seismic isolation structure. (A) shows a normal state, and (B) shows a state in the event of an earthquake. Even if the land (I) vibrates, the seismic isolation device (c) can suppress the seismic vibration of the building (A) itself and can avoid collapse.
[0003]
[Problems to be solved by the invention]
However, because the positional relationship between the land and the building changes relatively, the gas, electricity, and water and sewage pipes connected from the land to the building are damaged even if the building itself is not damaged. There is a risk of leakage, electric leakage, etc., and repairing underground piping requires a lot of time and effort.
[0004]
Thus, there is a demand for a means for preventing the piping from being damaged during an earthquake in a building having such a base isolation structure.
[0005]
[Means for Solving the Problems]
The pipe holding structure for a seismic isolation structure building according to claim 1 is characterized in that a connecting pipe (1) has one end of a pipe (3b) fixed to the seismic isolation structure building (a) side and a joint having flexibility and elasticity. The other end of the connecting pipe (1) is connected to the pipe (3a) fixed to the foundation (b) side via a flexible and stretchable joint (2a). The rotating shaft (7) is attached to either the foundation (I) or the seismic isolation structure (A), and the arm (8) is rotatable on the rotating shaft (7). A slider (9) that can slide along the arm (8) is attached to the arm (8), and the connecting pipe (1) is connected to the slider (9). The connecting pipe (1) and the slider (9) are connected to each other via a connecting member (14) that can extend and contract in a direction perpendicular to the rotational direction of the arm (8) .
[0006]
The pipe holding structure for a seismic isolation structure according to claim 2 is characterized in that the arm (8) can swing in a direction perpendicular to the rotation direction.
[0007]
According to this, even if the relative positional relationship between the land and the base-isolated structure changes due to the earthquake, the pipes (3a) and (3b) are flexible and stretchable joints (2a) because it is connected with (2b), the joint (2a), the pipe by deformation (2b) (3a), it is possible to prevent a strong force is applied to (3b). This can prevent the pipes (3a) and (3b) from being damaged during an earthquake .
[0008]
Two joints (2a), but connecting pipe located (1) is held by being connected to the slider (9) between the (2b), the slide of the slider (9) relative to the arm (8), the rotation axis By the rotation of the arm (8) about (7) , the slider (8) can move freely within the arm rotation surface. Therefore, even if the connecting pipe (1) moves due to deformation of the joints (2a) and (2b) , the slider (9) can continue to hold the connecting pipe (1) .
[0009]
Moreover, the swing of the telescopic or arm (8) of the connecting member (14), connecting tube (1) can be moved not only in the rotating direction of the arm (8) to which the vertical direction. Therefore, it is possible to cope with vertical vibration to some extent.
[0010]
A pipe holding structure for a base-isolated structure building according to claim 3 is the pipe holding structure according to claim 1 or 2, wherein a guide part (11) for supporting an end of the arm (8) opposite to the rotating shaft is provided . (12) is provided.
[0011]
According to this, since the weight applied to the arm (8) can be distributed to the rotating shaft (7) and the guide portions (11) , (12) , the pipes (3a) , (3b) , the joint (2a) , Even when (2b) is heavy, sufficient strength can be obtained.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
[Example 1]
FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a front view of the embodiment. 3 is an enlarged plan view of an essential part of the present embodiment, FIG. 4 is an enlarged front sectional view of an essential part of the present embodiment, and FIG. 5 is an enlarged side sectional view of the essential part of the present embodiment.
[0014]
(4) is a pipe fixing part on the foundation side, and the pipe (3a) on the foundation side is attached. (5) is a pipe fixing part on the bottom side of the building, and the pipe (3b) on the building side is attached. (4a) and (5a) are U bolts for fixing the pipes (3a) and (3b) to the pipe fixing parts (4) and (5).
[0015]
(1) is a connecting pipe, the shape is L-shaped, and both end portions are flange portions. (2a) and (2b) are joints having stretchability and flexibility. The connecting pipe (1) is connected to the building side pipe (3b) via the joint (2b), and the other end of the connecting pipe (1) is connected to the foundation side pipe (3a) via the joint (2a). Connected with.
[0016]
(7) is a rotating shaft attached to the bottom of the building (a) by the rotating shaft attaching portion (6). (8) is an arm rotatably attached to the rotating shaft. Therefore, the arm (8) can rotate on a substantially horizontal surface on the bottom of the building.
[0017]
(9) is a slider that can move along the arm (8), and the two roller portions (9a) that abut the upper and lower surfaces of the arm (8) so that the arm (8) can move smoothly. have.
[0018]
(10) is 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). Further, (10a) is a U bolt for fixing the connecting pipe (1).
[0019]
When the relative positional relationship changes between the land (I) and the seismic isolation structure (A) during an earthquake, the pipes (3a) and (3b) have flexibility and elasticity so that no force is applied to them. Joints (2a) and (2b) are deformed. 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 connector (10), the slider (9) moves along with the movement of the connecting pipe (1).
[0020]
The slider (9) can move freely within the arm rotation plane by sliding with respect to the arm (8) and by rotating the arm (8) about the rotation axis (7). Therefore, the slider (9) can follow the movement of the connecting pipe (1) and keep holding the connecting pipe (1).
[0021]
[Example 2]
This embodiment is an embodiment particularly suitable when the weight of the supporting piping is large. The basic configuration is the same as that of the first embodiment, except that a guide portion that supports the vicinity of the end portion on the opposite side of the arm rotation shaft is provided in order to disperse the pipe weight.
[0022]
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 cross-sectional view of the main part of the present embodiment. (11) is an arc-shaped guide groove, which is attached to the bottom of the building (a). A roller member (12) is attached to the end of the arm (8) opposite to the rotating shaft (7). The details of the roller member (12) are shown in FIG. 8, but the fixing portion (12a) to be fixed to the arm (8), the roller (12b) that rolls in the guide groove (11), and the connecting member ( 12c).
[0023]
With such a structure, the weight of the pipes and joints (2a), (2b), and the connecting pipe (1) that are applied to the arm (8) via the slider (9) is reduced between the rotary shaft (7) and the guide groove. (11) can be dispersed. Since the guide groove (11) is arranged in an arc shape centering on the rotating shaft (7), the end of the arm (8) can always be supported even if the arm (8) rotates. Therefore, sufficient mechanical strength can be maintained even when the weights of the joints (2a), (2b), etc. are large.
[0024]
In this embodiment, an arc guide groove and a roller running in the guide groove are used as the guide part. However, the guide part structure is not limited to this, for example, a planar guide plate or guide rail, The thing using the caster etc. which can move on it may be used.
[0025]
[Example 3]
FIG. 9 is a front view of the present embodiment, and FIG. 10 is an enlarged cross-sectional view of a connection portion between the connection pipe and the slider.
[0026]
The first embodiment and the second embodiment correspond to the movement in the horizontal direction (the rotation surface of the arm), but the present embodiment is also adapted to the vibration in the vertical direction.
[0027]
The slider (13) is connected to the connection pipe (1) via the connection pipe slider connection body (14), and the connection pipe slider connection body (14) is provided with a coil spring (14a).
[0028]
The position where the spring (14a) and the weight applied to the connecting pipe slider connecting body (14) are balanced at the normal time is the vertical position of the connecting pipe (1). At the time of vibration, the coil spring (14a) expands and contracts in accordance with the vertical vibration of the connecting pipe (1). Therefore, it is possible to cope with vertical vibrations within the expansion / contraction range of the coil spring (14a).
[0029]
[Example 4]
FIG. 11 is a front view of the present embodiment. This embodiment also corresponds to vertical shaking as in the third embodiment. However, in contrast to Example 3 where the connecting portion between the connecting pipe (1) and the slider (13) can be expanded and contracted, in this example, the arm (8) can also be rotated in the vertical direction. It corresponds by.
[0030]
Specifically, the rotating body (15) is rotatably attached to the rotating shaft (7) fixed to the bottom of the building. The rotating body (15) has a swing shaft (16), and an arm (8) is attached to the swing shaft (16).
[0031]
As a result, the arm (8) rotates within a certain range about the swinging shaft (16) in a direction perpendicular to the rotating direction of the rotating body (15) (a surface substantially parallel to the bottom surface of the building (a)). (Swing). (17) is a spring material that supports the arm (8) so that the arm (8) is substantially horizontal during normal times.
[0032]
In the event of an earthquake, even if the connecting pipe (1) vibrates up and down, the arm (8) to which the slider (9) is attached swings up and down.
[0033]
[Example 5]
Although the said Example 1-Example 4 demonstrated as an example the case where a rotating shaft was provided in the bottom part of a building (a), you may provide a rotating shaft (7) in a foundation (A). This embodiment is an embodiment in such a case, and FIG. 12 shows a front view of this embodiment.
[0034]
In the first to fourth embodiments, the connecting pipe (1) is held so as to be suspended from above, whereas in this embodiment, the connecting pipe (1) is held so as to be supported from below. Become. (18) is a connecting pipe slider connecting body, and the connecting pipe (1) is supported from below by a compression spring so that the joints (2a) and (2b) are substantially horizontal during normal times. Also in this embodiment, it is possible to cope with the vertical vibration of the connection pipe (1) by the expansion and contraction of the compression spring of the connection pipe slider connection body (18).
[0035]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a pipe holding structure capable of preventing the pipe from being damaged even in the event of an earthquake in a building having a seismic isolation structure.
[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.
4 is an enlarged front cross-sectional view of a main part of Example 1. FIG.
FIG. 5 is an enlarged side cross-sectional view of a main part of the first embodiment.
6 is a plan view of Example 2. FIG.
7 is a front view of Embodiment 2. FIG.
8 is an enlarged cross-sectional view of a main part of Example 2. FIG.
9 is a front view of Example 3. FIG.
10 is an enlarged cross-sectional view of a main part of Example 3. FIG.
11 is a front view of Example 4. FIG.
12 is a front view of Example 5. FIG.
FIG. 13 is a schematic view of a general base-isolated building.
[Explanation of symbols]
(A) Building (I) Foundation
(1) Connection pipe
(2a), (2b) Fitting
(3a) Piping (foundation side)
(3b) Piping (building side)
(4) Piping fixing part (foundation side)
(5) Piping fixing part (building side)
(6) Rotating shaft mounting part
(7) Rotating shaft
(8) Arm
(9) Slider
(10) Connection pipe slider connection
(11) Guide groove
(12) Roller member
(16) Swing axis

Claims (3)

One end of the connecting pipe is connected to a pipe fixed on the seismic isolation structure building side through a joint having flexibility and elasticity,
The other end of the connection pipe is connected to a pipe fixed on the base side via a joint having flexibility and stretchability.
A rotating shaft is attached to either the foundation or the seismic isolation structure,
An arm is pivotally attached to the rotating shaft,
A slider that can slide along the arm is attached to the arm,
The connecting pipe is connected to the slider ,
A pipe holding structure for a base-isolated structure, wherein the connecting pipe and the slider are connected via a connecting member that can be expanded and contracted in a direction perpendicular to the rotational direction of the arm . One end of the connecting pipe is connected to a pipe fixed on the seismic isolation structure building side through a joint having flexibility and elasticity,
The other end of the connection pipe is connected to a pipe fixed on the base side via a joint having flexibility and stretchability.
A rotating shaft is attached to either the foundation or the seismic isolation structure,
An arm is pivotally attached to the rotating shaft,
A slider that can slide along the arm is attached to the arm,
The connecting pipe is connected to the slider,
A piping holding structure for a base-isolated structure, wherein the arm can swing in a direction perpendicular to the rotating direction. The piping holding structure for a seismic isolation structure building according to claim 1 or 2, further comprising a guide portion for supporting an end portion of the arm opposite to the rotating shaft.

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