JP4540956B2 - Suspension holding structure for seismic isolation piping - Google Patents

Description

  The present invention relates to a suspension holding structure for a seismic isolation pipe, in which a connection pipe disposed between a building-side pipe and a ground-side pipe is hung on the bottom of a building via a wire and a spring mechanism. It belongs to the technical field of the structure of the spring mechanism.

  Conventionally, as disclosed in, for example, Patent Document 1 as a structure of this type of seismic isolation pipe, a connection pipe is connected to each of the building side pipe and the ground side pipe via a seismic isolation joint and has a damping function. 2. Description of the Related Art It is known that the connection pipe is fishingly supported at the bottom of a building by a hanging tool provided with a spring mechanism and a wire.

  In recent years, buildings with seismic isolation devices that can reduce shaking due to earthquakes have attracted attention in recent years. According to this seismic isolation device, even if the ground vibrates, the vibration of the building itself is suppressed and it can escape collapse, but the relative positional relationship between the ground and the building changes. Even if there is no damage, the gas, electricity, water and sewage pipes leading from the ground to the building will be damaged, and there is a risk of gas leakage, leakage, etc. Also, it takes a lot of time and effort to repair underground piping.

  Therefore, various means for preventing the breakage of piping in the event of an earthquake in a building having such a seismic isolation device have been studied, and the structure as in the conventional example (Patent Document 1) has been disclosed. It is. More specifically, the structure of the conventional example is such that both ends of the connecting pipe are connected to the building-side piping and the ground-side piping by joints having flexibility and elasticity, respectively, and the connecting pipe itself is the bottom of the building. It is said that the pipe can be prevented from being damaged because it is suspended by a wire and can be moved in both horizontal and vertical directions.

  In particular, in the piping structure as described in Patent Document 1 as the second embodiment, as shown in FIG. 3, the lower end portion is connected to the connecting pipe (1) and the wire (6 ) Is turned sideways by the pulley (5), and the other end of the wire (6) is attached to the bottom (C) of the building via a sideways coil spring (18). Since the coil spring (18) is disposed horizontally, the space required for installing the hanging tool can be made relatively small up and down, so that the vertical distance between the bottom of the building and the ground is small. It can be applied even in a narrow case, and can be said to have high utility value.

  By the way, generally, a beam is provided at the bottom of a building, and the horizontal dimension of the pipes and suspenders must be smaller than the interval between the beams so as not to interfere with the beams. Also, piping includes gas, electricity, water and sewage, etc., and these are complicatedly routed between the bottom of the building and the ground, so it is also suspended to avoid interference with other piping and its holding members. The installation space for the lowering tool is desirably as compact as possible in the lateral direction.

  In this regard, in the hanging tool of the conventional example (second embodiment of Patent Document 1), when the connecting pipe (1) moves relative to the building during an earthquake, the wire (6) is suspended vertically. The direction part tilts like a pendulum with the top pulley (5) as a fulcrum and the coil spring (18) expands and contracts to pull out the wire (6), thereby absorbing the relative movement of the connecting pipe (1). It is supposed to be. Therefore, when installing the suspending tool, a laterally long space is required to some extent in consideration of the amount of expansion and contraction of the coil spring (18) laid out sideways.

  That is, when the coil spring (18) and the wire (6) are arranged in series as shown, the wire (6) accompanying the expansion and contraction between the end of the coil spring (18) and the pulley (5). The space required for the amount of drawer is required, so the installation space in the longitudinal direction of the hanger must be at least the free length of the coil spring (18) plus the distance to the pulley (5) . And the free length of the coil spring (18) which expands and contracts by being pulled by the wire (6) as described above must be increased to some extent in accordance with the amount of the wire (6) to be drawn. This is a problem that if the free length of the coil spring (18) is too short relative to the amount of the wire (6), the coil spring (18) is fully retracted in the event of an earthquake, and the wire cannot be pulled out any further. It is because it produces.

  Especially when the distance between the bottom of the building and the pipe is narrow, the hanging length of the wire (6) hanging from the pulley (5) is shortened accordingly, so that the connection that can be absorbed geometrically by the inclination of the wire (6) The amount of relative movement of the tube (1) becomes smaller, and a larger amount of wire (6) needs to be pulled out. For this reason, as shown in FIG. 4, the free length of the coil spring (18) becomes considerably long, and the distance between the coil spring (18) and the pulley (5) becomes considerably large. There has been a problem in that the installation space increases in a horizontal direction.

For such a problem, for example, in Patent Document 2, by attaching a wire for suspending a connecting pipe to a spring member via a moving pulley, the amount of expansion and contraction of the spring member is made half of the amount of wire drawing, It has been proposed to reduce the installation space for the suspension tool in the lateral direction by ensuring that the free length of the spring member can be made relatively short while securing the amount of wire that is pulled along with the movement of the connecting pipe during an earthquake. ing.
Japanese Patent No. 3363742 Utility Model Registration No. 3055101

  However, in the above proposed example (Patent Document 2), in addition to the pulley for changing the extending direction of the wire, a moving pulley interposed between the wire and the spring member is required. A holding member for properly holding the moving pulley and moving it so as not to hinder the smooth operation of the spring member or wire must be provided separately, which makes the structure complicated and expensive. There is.

  The present invention has been made in view of such a point, and an object of the present invention is to connect a connecting pipe disposed between a building-side pipe and a ground-side pipe via a wire and a spring mechanism. In the suspension holding structure for seismic isolation pipes that are hung on the spring mechanism, the spring mechanism that secures the amount of wire drawn and does not require much installation space in the direction of wire drawing (lateral direction in which the wire extends) is relatively simple. It is to be realized with a simple structure.

  In order to achieve the above object, the spring mechanism of the present invention has a support member that slidably supports a connecting member to which wires are connected, and is arranged at the bottom of a building so as to slide itself. And it shall have two coil springs which give required urging | biasing force with respect to each of the two steps of sliding operation | movement.

  Specifically, the invention of claim 1 suspends a connecting pipe connected to a building-side pipe and a ground-side pipe through a seismic isolation joint, while suspending the connecting pipe from one end of the wire. The seismic isolation pipe is suspended by connecting the other end of the laterally extending wire to the bottom of the building via a spring mechanism by changing the extending direction of the horizontal direction by a pulley disposed at the bottom of the building. It is a holding structure.

And, the said spring mechanism, the cooperative member is interlocking the end of the wire extending in the horizontal as well as slidably supported in the extending direction of the wire itself, the building so as to extend in the wire drawing direction A slide support member that is slidably supported by a shaft disposed at the bottom of the wire, and a direction that increases tension of the wire in the wire extending direction relative to the connecting member. A first coil spring for applying a force, and a second coil spring disposed in parallel with the first coil spring for applying a biasing force in a direction in which the wire tension increases in the wire extending direction to the slide support member. Coil springs.

That is, the connecting member in the spring mechanism includes a connecting rod that slidably passes through one end portion of the slide support member and extends in the wire extending direction, and the connecting rod extends outward from one end portion of the slide support member. A turnbuckle is interposed in the middle of the portion on the front end side protruding in parallel with the shaft.

And the other end side of the wire whose end is connected to the tip of the connecting rod extends laterally from the connecting member toward one side in the extending direction of the wire, and the first coil spring is The second coil spring is disposed between the slide support member and the linking member so as to apply a biasing force toward the other side of the wire extending direction from the slide support member to the linking member. The biasing force is arranged between the slide support member and the building-side member in parallel with the first coil spring, and is directed from the building-side member toward the other side of the wire extending direction with respect to the slide support member. When the connecting member moves in the wire extending direction, the first and second coil springs are simultaneously expanded and contracted.

  In the above structure, when the connecting pipe moves relative to the building in the horizontal or vertical direction in the event of an earthquake, the wire is pulled by this, and the connecting member connected at the end of the connecting pipe becomes the biasing force of the first coil spring. The slide support member slides against the urging force of the second coil spring against the urging force of the second coil spring. The total amount of slide movement in the two stages corresponds to the amount of wire drawn, so that the wire necessary to absorb the movement of the connecting pipe is not necessary even if the slide movement amount in each stage is not so large. Can be secured.

  From this, the free lengths of the two coil springs that expand and contract corresponding to each of the two stages of sliding movements do not have to be so large, and it is assumed that both coil springs are arranged in series. If this is done, the total length of the springs will be a long one corresponding to the amount of the wire drawn, but in the present invention, since two coil springs are arranged in parallel, the installation space in the longitudinal direction of the spring mechanism Will not be too big.

  In other words, the spring mechanism is a double slide mechanism that slides in two steps according to the drawing of the wire, and two coil springs are arranged in parallel, so that the amount of wire drawing required in the event of an earthquake is secured. However, the dimension of the spring mechanism in the longitudinal direction (lateral direction) can be shortened with a relatively simple configuration, and thereby space saving in the lateral direction of the installation space of the seismic isolation pipe can be achieved.

According to a second aspect of the present invention, the connecting member further includes a slider supported by the slide support member so as to slide in a range from one end portion in the longitudinal direction to the other end portion. the so as to extend toward the one end side of the slide support member connecting rods is provided, in which slidably is inserted into the slide support through-hole formed at one end of the member.

  In this configuration, the connecting member is slidably supported by the slide support member at two points where the slider and the connecting rod are separated from each other in the longitudinal direction of the slide support member. Operation is stable. Furthermore, if the first coil spring is disposed coaxially with the connecting rod between the slider and one end of the slide support member, the slide operation can be further stabilized.

  In the invention of claim 3, in the suspension holding structure for the seismic isolation pipe, the same coil spring is used as the first and second coil springs. In this way, cost can be reduced.

  As described above, according to the suspension holding structure for a seismic isolation pipe according to the present invention, the direction of the wire for suspending the connection pipe is changed to the side by the pulley, and the end of the sideways wire is constructed by the spring mechanism. When connecting to the bottom of the spring, the spring mechanism is slid in two stages, and two coil springs are provided so as to expand and contract in response to the two-stage slide movement and to apply an urging force, respectively. As a result, the lateral dimension of the spring mechanism can be shortened with a relatively simple configuration while securing the amount of wire drawing required to absorb the movement of the connecting pipe during an earthquake. Thereby, even if there is no allowance in the piping installation height of the building, the seismic isolation piping can be installed in the same lateral space as before.

  According to the invention of claim 2, the sliding operation is stabilized by supporting the connecting member to which the end of the wire is connected at two points separated from the slide supporting member in the longitudinal direction, and further, According to the invention of claim 3, the cost can be reduced by sharing the two coil springs.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows a suspension holding structure A for a seismic isolation pipe according to an embodiment of the present invention. In FIG. 1, reference numeral 1 is arranged between the bottom C of the building and the ground G, and the building side pipe 2 and the ground. It is a connection pipe connected to a side pipe (not shown) via a seismic isolation joint 4 (only one is shown) having flexibility and stretchability. The connecting pipe 1 is connected to a lower end portion (one end portion) of a wire 6 that is wound around a pulley 5 disposed at the bottom C of the building and hangs substantially vertically. It is suspended so as to be movable.

  The pulley 5 is for changing the direction of the wire 6 for suspending the connecting pipe 1 to the horizontal direction so as to extend substantially parallel to the bottom C of the building (substantially horizontal to the ground G). A base 9 suspended from a flange plate 7 fastened by an anchor bolt or the like (not shown) to the bottom C of the base plate 9 is rotatably attached around its shaft. Then, an end portion (the other end portion) of the wire 6 extending in the left-right direction in the drawing substantially parallel to the bottom portion C of the building is attached to the bottom portion C of the building via the spring mechanism 10.

  Although it is a characteristic part of the present invention, the spring mechanism 10 is arranged so as to extend in the extending direction of the laterally oriented wire 6, and is fixed to both ends in the longitudinal direction (left and right ends in the figure) by welding or the like. The L-shaped brackets 11, 11 are provided with a shaft 12 fastened to the bottom C of the building by anchor bolts (not shown), and so as to extend in the longitudinal direction of the shaft 12, and are disposed at both ends thereof. A slide case 14 (slide support member) that is slidably supported by the shaft 12 by the slide brackets 13 and 13, and a slider 15 that is slidably accommodated in the slide case 14 in its longitudinal direction. ing.

  That is, for example, the slide case 14 is configured such that, for example, both end portions in the longitudinal direction of the cylindrical member having a substantially rectangular cross section are closed by the lower portions of the substantially plate-like slide brackets 13 and 13 and upward from the main body of the slide case 14. Openings that are slightly larger than the cross section of the shaft 12 are provided in the upper portions of the extending slide brackets 13 and 13, respectively, and both the openings are slidably inserted into the shaft 12.

  Further, the base end portion of the connecting rod 16 is fixed to the slider 15 by welding or the like. The connecting rod 16 extends substantially horizontally from the slider 15 toward one end side (right side in the figure) of the slide case 14 and slides in a through hole of the slide bracket 13 positioned at one end portion of the slide case 14. The end of the wire 6 is connected to the tip of a connecting rod 16 that is freely inserted and extends further therefrom. Thus, since the slider 15 and the connecting rod 16 are supported at two points separated from each other in the longitudinal direction of the slide case 14, they slide integrally and stably. That is, the slider 15 and the connecting rod 16 constitute a connecting member.

  A turnbuckle 17 for adjusting the length is interposed in the middle of the connecting rod 16 extending outwardly from one end of the slide case 14 as described above. The side and the wire 6 connected to the tip thereof are positioned substantially coaxially and extend side by side in parallel with one end side (right side in the drawing) of the shaft 12.

  Further, one end of the slide case 14 is brought into contact with the back surface of one end (the lower part of the slide bracket 13) through which the connecting rod 16 passes, and the other end is brought into contact with the slider 15. A first coil spring 18 is housed for pressing and urging the slider 15 from one end side to the other end side of the slide case 14. The coil spring 18 is positioned substantially coaxially with the connecting rod 16, whereby the sliding operation of the slider 15 is further stabilized. Further, one end of the shaft 12 is wound around one side of the L-shaped bracket 11 fixed to one end of the shaft 12 and the other end is connected to one end of the slide case 14. A second coil spring 19 is disposed in contact with the upper portion of the slide bracket 13 to press and urge the slide case 14 from one end side to the other end side of the shaft 12.

  In the spring mechanism 10 configured in this way, when the tension of the wire 6 changes and the slider 15 moves, the slider 15 slides with respect to the slide case 14, and the slide case 14 itself moves to the shaft 12. It is a two-stage slide mechanism that slides along. At that time, the slider 15 receives a biasing force from the first coil spring 18 in the slide case 14 from one end to the other end (that is, in the direction in which the tension of the wire 6 increases). The slider 15 receives the biasing force of the second coil spring 19 in the same direction as described above, and thus the slider 15 balances the pressing biasing force of the two coil springs 18 and 19 with the tension of the wire 6. It stops at the position (force equilibrium point).

  And, for example, the relative position of the bottom C of the building and the ground G changes during the earthquake, the connecting pipe 1 moves relative to the bottom C of the building, and the wire 6 is pulled along with this, When being pulled out from the spring mechanism 10, as shown in FIG. 2, the slider 15 moves from the other end side of the slide case 14 to one end side (from the left to the right in the figure) against the biasing force of the first coil spring 18. The slide case 14 itself slides from the other end side of the shaft 12 toward the one end side against the urging force of the second coil spring 19.

  Thus, once the two coil springs 18 and 19 are compressed by the inertia beyond the force balance point, the slider 15 and the slide case 14 are now moved from the opposite side, that is, from the one end side by the spring force. It moves to the other end side (from right to left in the figure). At this time, the slider 15 slides from one end side to the other end side in the slide case 14 by the pressing biasing force of the first coil spring 18, and the slide case 14 is driven by the pressing biasing force of the second coil spring 19. Slide from one end side to the other end side.

  Since the slide movement is performed in two stages as described above, the pulling amount of the wire 6 from the spring mechanism 10, that is, the absolute movement amount of the slider 15 is the sliding movement amount of the slider 15 with respect to the sliding case 14 and the sliding case 14. Therefore, even if the strokes of the individual slide movements are not so large, it is possible to secure the pull-out amount of the wire 6 necessary to absorb the movement of the connecting pipe 1. it can.

  Further, the amount of expansion and contraction of the two coil springs 18 and 19 that expands and contracts corresponding to each of the two stages of sliding movements is sufficiently shorter than the amount of the wire 6 drawn (two coil springs 18 and 19). , The expansion / contraction amount may be half of the pull-out amount of the wire 6). From this, the free lengths of the two coil springs 18 and 19 may not be so long.

  Furthermore, an interval is required between the tip of the connecting rod 16 projecting from one end of the slide case 14 (the right end in the figure) and the pulley 5 so as to match the amount of wire 6 to be pulled out. In the embodiment, the connecting rod 16 is positioned coaxially with the first coil spring 18 in the slide case 14, and the end portion on the one end side (right end portion in the figure) of the entire spring mechanism 10, that is, the first coil spring 18. One end portion (right end portion in the drawing) of the shaft 12 in which the second coil spring 19 in parallel with the shaft is disposed is located closer to the pulley 5 than the tip portion of the connecting rod 16. That is, the distance between the spring mechanism 10 and the pulley 5 is narrower than that corresponding to the amount of the wire 6 pulled out.

  Therefore, according to the suspension holding structure A of the seismic isolation pipe according to this embodiment, the spring mechanism 10 for attaching the upper end portion of the wire 6 to the bottom portion C of the building is double-sliding as the wire 6 is pulled out. Since the two coil springs 18 and 19 corresponding to the respective slide operations are arranged in parallel, the stroke of each slide operation is shortened, and the free length of the two coil springs 18 and 19 is also shortened. Thus, the length of the spring mechanism 10 can be reduced as compared with the conventional one. Moreover, the distance between the spring mechanism 10 and the pulley 5 can be made relatively narrow with respect to the amount of wire 6 pulled out.

  From this, the wire 6 for absorbing the movement of the connecting pipe 1 in the event of an earthquake is secured in the same amount as before, but with a relatively simple configuration that does not use a moving pulley or the like (ie, relatively Low cost), the lateral space required for the installation of seismic isolation piping can be made smaller than before, and there is no room for height between the bottom C of the building and the ground G as shown in FIG. Even when the suspension height of the connection pipe 1 is severely limited, the seismic isolation pipe can be accommodated in the same lateral installation space as when the height is sufficient.

In the spring mechanism 10 of this embodiment, the distal end side of the connecting rod 16 with the turnbuckle 17 interposed in the middle protrudes greatly from one end of the slide case 14 toward the pulley 5, and the spring mechanism 10 and the pulley are correspondingly increased. However, if the turnbuckle 17 is downsized and the amount of protrusion of the connecting rod 16 from the slide case 14 is reduced, the seismic isolation pipe is accommodated in a smaller space. be able to.

  Further, in the spring mechanism 10 of the above-described embodiment, if the two coil springs 18 and 19 are the same, the cost can be further reduced by sharing parts.

  Furthermore, in the said embodiment, although the one 2nd coil spring 19 which urges | biases the slide case 14 in the spring mechanism 10 is made into one, it does not restrict to this. That is, for example, two shafts 12 that slidably support the slide case 14 with respect to the bottom C of the building are arranged side by side in parallel to each other (in a direction perpendicular to the paper surface in FIGS. 1 to 4). The same coil springs 19 and 19 may be wound around the shafts 12 and 12, respectively.

  Furthermore, in the spring mechanism 10 of the above embodiment, the slide case 14 is slidably attached to the shaft 12 by the slide brackets 13 and 13 provided at both ends in the longitudinal direction. 14 may be attached to the shaft 12 by a slide bracket provided only on the other end side in the longitudinal direction (left end side in FIGS. 1 to 4). In short, the slide case 14 has its own longitudinal direction (stretching of the wire 6). It suffices to be arranged at the bottom C of the building so as to be slidable in the direction).

It is a figure which shows the suspension holding structure of the seismic isolation piping which concerns on embodiment of this invention. FIG. 2 is a view corresponding to FIG. 1 in a state where a wire is pulled out as the connecting pipe moves. It is a FIG. 1 equivalent view of the seismic isolation piping holding structure of a conventional example (patent document 1). FIG. 4 is a view corresponding to FIG. 3 when the height from the ground to the building is small.

A Hanging structure for seismic isolation piping C Building bottom 1 Connection pipe 2 Building side piping 4 Seismic isolation joint 5 Pulley 6 Wire 10 Spring mechanism 12 Shaft 13 Slide bracket 14 Slide case (slide support member)
15 Slider (linking member)
16 Connecting rod (connecting member)
18 First coil spring 19 Second coil spring

Claims (3)

A connecting pipe connected to the building-side pipe and the ground-side pipe via a seismic isolation joint is connected to one end of the wire and suspended, and the direction in which the wire extends is arranged at the bottom of the building. The structure is a suspension holding structure for a seismic isolation pipe, which is changed sideways by a pulley and the other end of the sideways extending wire is connected to the bottom of the building via a spring mechanism,
The spring mechanism is
Shaft with a cooperative member that is interlocking the end of the wire extending in the lateral supports slidably the extending direction of the wire itself, which is disposed on the bottom of the building so as to extend in the wire drawing direction And a slide support member that is slidably supported,
The linking member includes a connecting rod that slidably penetrates one end of the slide support member and extends in the wire extending direction, and a distal end side of the connecting rod that protrudes outward from the end of the slide support member In the middle of the part, a turnbuckle is interposed in parallel with the shaft, and the end of the wire is connected to the tip of the connecting rod,
The other end of the wire extend sideways toward the extending direction one side of the wire from the tip of the interlocking rod,
Further, a first coil spring disposed between the slide support member and the linking member, and applying a biasing force toward the other side of the wire extending direction from the slide support member to the linking member,
Arranged between the slide support member and the building-side member in parallel with the first coil spring, an urging force from the building-side member toward the other side of the wire extending direction with respect to the slide support member. A second coil spring to be applied,
A structure for hanging and holding a seismic isolation pipe, wherein the first and second coil springs simultaneously expand and contract when the connecting member moves in the wire extending direction. The connecting member is
The slide support member further includes a slider supported so as to slide in a range from one end to the other end in the longitudinal direction,
Connecting rod is provided from the slider so as to extend toward the one end of the slide support member, and characterized by being slidably inserted into the through hole formed in one end portion of the slide support member The suspension holding structure for a seismic isolation pipe according to claim 1.   The suspension holding structure for seismic isolation piping according to claim 1, wherein the same coil spring is used for the first and second coil springs.

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