JP7230318B2 - suspension structure - Google Patents

Description

The present invention relates to suspension structures.

A lighting fixture that is suspended from a ceiling or the like is known (for example, Patent Document 1). The luminaire is connected to a wire strung between the stanchions.

JP-A-54-117182

Although the technique disclosed in Patent Literature 1 reduces the vibration of lighting fixtures by wires, there is room for improvement in order to further reduce the vibration of suspended objects such as lighting fixtures.

SUMMARY OF THE INVENTION In view of the above facts, an object of the present invention is to reduce swinging of an object suspended by a suspension member.

A suspension structure according to a first aspect includes a first wire rod stretched between first support portions, a second wire rod stretched between second support portions and intersecting the first wire rod in a plan view, and a suspension a hanging object suspended by a material and arranged around an intersection of the first wire and the second wire in a plan view; a first connecting portion slidably connected to the first wire; and a second connecting portion that is slidably connected to the second wire rod, and is provided at the crossing portion and is attached to the hanging member or the hanging object.

According to the suspension structure according to the first aspect , the first wire is stretched between the first support portions. On the other hand, the second wire is stretched between the second support portions and intersects the first wire in a plan view. Around the crossing portion of the first wire and the second wire (hereinafter referred to as "wire crossing portion"), in a plan view, a hanging object suspended by a hanging material is arranged.

Here, a vibration damping device is provided at the wire crossing portion. The anti-vibration device has a first connecting portion and a second connecting portion. The first connecting portion is slidably connected to the first wire. On the other hand, the second connecting portion is slidably connected to the second wire. A suspending material or a suspending object is attached to the anti-vibration tool.

As a result, swinging of the suspended object in the direction along the first wire is restricted by the second wire through the second connecting portion. In addition, swinging of the suspended object in the direction along the second wire is restricted by the first wire via the first connecting portion.

As described above, in the present invention, the first wire and the second wire that intersect in plan view reduce the vibration of the suspended object in two directions.

Further, as described above, the first connecting portion is slidably connected to the first wire, and the second connecting portion is slidably connected to the second wire. As a result, it is possible to suppress the movement of the wire crossing portion in plan view while applying tension to the first wire and the second wire.

Specifically, for example, when the first wire and the second wire are bound at the wire crossing portion, when tension is applied to the first wire and the first wire is moved, the wire crossing portion becomes to move. As a result, the second wire may be bent with the wire intersection portion as a fulcrum, causing the position of the second wire to shift. Furthermore, since the second wire resists when tension is applied to the first wire, it is difficult to apply tension to the first wire.

On the other hand, in the present invention, as described above, the first connecting portion of the anti-vibration device is slidably connected to the first wire rod. In this state, when tension is applied to the first wire to move the first wire, the first wire slides with respect to the first connecting portion. Therefore, the wire crossing portion is suppressed from moving in plan view. Therefore, it is suppressed that the second wire is bent with the wire crossing portion as a fulcrum and the second wire is displaced. Furthermore, since the resistance of the second wire is reduced when tension is applied to the first wire, it becomes easier to apply tension to the first wire.

Similarly, the second connecting portion of the anti-vibration device is slidably connected to the second wire. In this state, when tension is applied to the second wire to move the second wire, the second wire slides with respect to the second connecting portion. Therefore, the wire crossing portion is suppressed from moving in plan view. Therefore, it is suppressed that the first wire bends with the wire intersection portion as a fulcrum and the first wire is displaced. Moreover, since the resistance of the first wire is reduced when tension is applied to the second wire, it becomes easier to apply tension to the second wire.

As described above, in the present invention, it is possible to suppress the movement of the wire crossing portion in plan view while applying tension to the first wire and the second wire. Therefore, workability of the first wire and the second wire is improved.

A suspension structure according to a second aspect is the suspension structure according to the first aspect , wherein the vibration damping member is slidably attached to the suspension member.

According to the suspension structure according to the second aspect , the anti-vibration device is slidably attached to the suspension member.

Here, when tension is applied to the first wire rod and the second wire rod, the wire crossing portion and the anti-vibration member provided at the wire crossing portion are raised. At this time, if the anti-vibration device is fixed to the suspension member, the suspension member and the suspended object may rise and the installation height of the suspended object may shift upward.

On the other hand, according to the present invention, as described above, the anti-vibration member is slidably attached to the hanging member. Thus, when tension is applied to the first wire rod and the second wire rod and the wire crossing portion and the vibration damper are lifted, the vibration damper slides upward with respect to the suspension member. Therefore, the wire rod and the hanging object are suppressed from rising. Therefore, it is possible to prevent the installation height of the hanging object from shifting upward.

A suspension structure according to a third aspect is, in the suspension structure according to the first aspect or the second aspect , a first tension applying member provided on the first wire to apply tension to the first wire; and a second tension applying member provided in the second wire rod for applying tension to the second wire rod.

According to the suspension structure according to the third aspect , the first wire rod is provided with the first tension applying member. Also, the second wire is provided with a second tension applying member. The tension applied to the first wire and the second wire can be easily adjusted by the first tension applying member and the second tension applying member.

A suspension structure according to a fourth aspect is the suspension structure according to any one of the first to third aspects , wherein the anti-vibration member is the first connecting portion into which the first wire is slidably inserted. and the second connecting portion that intersects with the first cylindrical member in plan view and is joined to the first cylindrical member, and into which the second wire rod is slidably inserted a second tubular member; and an annular member that is hooked to the intersection of the first tubular member and the second tubular member and surrounds the hanging member.

According to the suspension structure according to the fourth aspect , the antivibration device includes the first tubular member, the second tubular member, and the annular member. A first wire rod is slidably inserted into the first cylindrical member. On the other hand, the second wire rod is slidably inserted into the second cylindrical member. Also, the second tubular member intersects with the first tubular member in plan view and is joined to the first tubular member. By hooking the ring-shaped member surrounding the hanging member to the intersection of the first tubular member and the second tubular member, the hanging member can be easily attached to the anti-vibration device.

As described above, according to the suspension structure according to the present invention, it is possible to reduce the vibration of the object suspended by the suspension member.

1 is a plan view showing a plurality of lighting fixtures to which a suspension structure according to one embodiment is applied; FIG. FIG. 2 is a perspective view showing the anti-vibration device and lighting fixture shown in FIG. 1; FIG. 3 is a plan view showing the anti-vibration device shown in FIG. 2; 4 is a cross-sectional view taken along line 4-4 of FIG. 3; FIG. (A) is a plan view showing a lighting fixture to which a suspension structure according to a comparative example is applied, and (B) is an elevation view showing a lighting fixture to which a suspension structure according to a comparative example is applied. 3 is a perspective view corresponding to FIG. 2 showing a lighting fixture to which a modification of the suspension structure according to one embodiment is applied; FIG.

Hereinafter, a suspension structure according to one embodiment will be described with reference to the drawings.

(suspension structure)
FIG. 1 shows a plurality of lighting fixtures 20 to which a suspension structure 30 according to this embodiment is applied. A plurality of lighting fixtures 20 are provided inside the structure 10 . The structure 10 includes a plurality of pillars 12 and a plurality (four) of walls 14X and 14Y provided between the adjacent pillars 12, and is formed in a rectangular shape in plan view.

The plurality of lighting fixtures 20 are arranged at predetermined intervals in two horizontal directions (the arrow X direction and the arrow Y direction). As shown in FIG. 2, each lighting fixture 20 is suspended from the ceiling (not shown) of the structure 10 by a hanging member 22. As shown in FIG. In addition, the plurality of lighting fixtures 20 are installed at approximately the same height, for example.

Here, the suspension structure 30 according to the present embodiment is used as a countermeasure against shaking of a plurality of existing lighting fixtures 20 . Specifically, when the length of the hanging member 22 (suspension length) is long, or when the distance between adjacent lighting fixtures 20 is narrow, when the lighting fixtures 20 shake during an earthquake, the adjacent lighting fixtures 20 come into contact with each other. there's a possibility that. As a countermeasure against this, a hanging structure 30 is applied to a plurality of lighting fixtures 20 . Note that the lighting fixture 20 is an example of a suspended object.

As shown in FIG. 1, the suspension structure 30 is provided at a plurality of first wires 32 and second wires 34 that intersect each other in a plan view, and at intersections C of the first wires 32 and the second wires 34, respectively. A plurality of anti-vibration tools 40 are provided.

(First wire and second wire)
The first wire 32 and the second wire 34 are made of, for example, wires, ropes, or the like. The plurality of first wires 32 are arranged along the arrow X direction and arranged at intervals in the arrow Y direction. These first wires 32 pass around the suspension member 22 and are stretched between a pair of walls 14X facing each other in the arrow X direction. A first tension imparting member 36 such as a turnbuckle for imparting tension to the first wire rods 32 is provided on one end side of each first wire rod 32 .

The second wire rods 34 are arranged along the arrow Y direction and are arranged at intervals in the arrow X direction. These second wires 34 pass around the suspension member 22 and are stretched between a pair of walls 14Y facing each other in the arrow Y direction. A second tension applying member 38 such as a turnbuckle for applying tension to the second wire rods 34 is provided on one end side of each second wire rod 34 .

Here, the plurality of first wires 32 and the plurality of second wires 34 intersect (perpendicularly in this embodiment) around the hanging member 22 in plan view. In other words, as shown in FIG. 3 , the hanging member 22 and the lighting fixture 20 are arranged around the intersection (hereinafter referred to as “wire intersection”) C of the first wire rod 32 and the second wire rod 34 in plan view. are placed. The wire rod crossing portion C is provided with a vibration damping member 40 .

(Stabilizer)
As shown in FIG. 2 , the anti-vibration device 40 has a first tubular member 42 , a second tubular member 44 and an annular member 50 . The first tubular member 42 and the second tubular member 44 are formed in a cylindrical shape. These first tubular member 42 and second tubular member 44 are formed of, for example, metal pipes (metal pipes). Also, the first tubular member 42 and the second tubular member 44 are laid down. In other words, the first tubular member 42 and the second tubular member 44 are arranged with their central axes lying sideways.

As shown in FIG. 3, the first tubular member 42 and the second tubular member 44 are arranged so as to cross each other (perpendicularly in this embodiment) in plan view. More specifically, the first tubular member 42 and the second tubular member 44 are arranged such that their central axes intersect each other in plan view.

As shown in FIG. 4, the first tubular member 42 rests on the second tubular member 44 . 42 A of outer peripheral surfaces of this 1st cylindrical member 42 and 44 A of outer peripheral surfaces of the 2nd cylindrical member 44 are joined by welding etc. in the intersection part. Thereby, the first tubular member 42 and the second tubular member 44 are integrated.

As shown in FIG. 3, the first tubular member 42 and the second tubular member 44 are provided at the wire crossing portion C. As shown in FIG. The first wire rod 32 is slidably inserted inside the first cylindrical member 42 . In other words, the first tubular member 42 is slidably connected to the first wire rod 32 . On the other hand, the second wire rod 34 is slidably inserted inside the second cylindrical member 44 . In other words, the second tubular member 44 is slidably connected to the second wire rod 34 .

As shown in FIG. 2, an annular member 50 is hung at the intersection of the first tubular member 42 and the second tubular member 44 . Via this annular member 50, the intersecting portion of the first tubular member 42 and the second tubular member 44 and the hanging member 22 are connected so as to be relatively displaceable in the vertical direction.

Specifically, the annular member 50 has an attachment wire 52 such as a wire that can be bent or bent in an annular shape (ring shape), and a connector 54 that detachably connects both ends of the attachment wire 52 . ing. The annular member 50 is diagonally attached to the intersection of the first tubular member 42 and the second tubular member 44 so as not to fall from the intersection.

Here, the annular member 50 surrounds the predetermined portion 22P of the suspending member 22 of the lighting device 20 in a state of being hung on the intersection of the first tubular member 42 and the second tubular member 44 . As a result, shaking of the predetermined portion 22P of the suspension member 22 during an earthquake is suppressed. Moreover, the annular member 50 surrounds the suspension member 22 with a gap therebetween. Thereby, the annular member 50 can slide vertically along the hanging member 22 . In other words, the annular member 50 is slidably connected to the hanging member 22 .

(Construction method for suspension structure)
Next, an example of a construction method for the suspension structure 30 according to this embodiment will be described.

First, on the floor of the structure 10, a plurality of first wires 32 and second wires 34 are arranged in a grid pattern, and the first tubular member 42 and the second tubular member 44 of the anti-vibration device 40 are placed at the wire intersections C. to install. Specifically, the first wire rod 32 is slidably inserted into the first tubular member 42 , and the second wire rod 34 is slidably inserted into the second tubular member 44 .

Next, a plurality of first wires 32 are stretched between the pair of wall bodies 14X, and a plurality of second wire rods 34 are stretched between the pair of wall bodies 14Y, so that the hanging members 22 of the lighting equipment 20 are provided as vibration dampers. The tool 40 is provisionally positioned (temporary positioning). At this time, the first tension applying members 36 are attached to one ends of the plurality of first wires 32 , and the second tension applying members 38 are attached to one ends of the plurality of second wires 34 .

Next, the intersecting portion of the first tubular member 42 and the second tubular member 44 and the predetermined portion 22P of the hanging member 22 are slidably connected by the annular member 50 . Specifically, the intersection of the first tubular member 42 and the second tubular member 44 and the predetermined portion 22P of the hanging member 22 are surrounded by the attachment wire 52, and both ends of the attachment wire 52 are connected by the connectors 54. Thereby, the annular member 50 is connected to the hanging member 22 so as to be vertically slidable.

Next, tension is applied to the first wire rod 32 by the first tension applying member 36, and the first wire rod 32 is pulled up to a predetermined height. Similarly, tension is applied to the second wire rod 34 by the second tension applying member 38 to lift the second wire rod 34 to a predetermined height. At this time, the first tubular member 42 and the second tubular member 44 of the anti-vibration member 40 slide along the first wire rod 32 and the second wire rod 34, respectively.

When the first wire rod 32 and the second wire rod 34 are pulled up by the first tension applying member 36 and the second tension applying member 38, the wire intersection portion C and the anti-vibration member 40 are lifted. At this time, the annular member 50 slides upward along the hanging member 22 . As a result, the anti-vibration device 40 is positioned around the predetermined portion 22P of the hanging member 22. As shown in FIG. As a result, the horizontal vibration of the predetermined portion 22P of the hanging member 22 is restricted (restricted) by the anti-vibration member 40 .

(action)
Next, the operation of this embodiment will be described.

According to the hanging structure 30 according to the present embodiment, as shown in FIG. 1, the plurality of first wires 32 are stretched between the pair of walls 14X. On the other hand, the plurality of second wires 34 are stretched between the pair of walls 14Y and intersect with the plurality of first wires 32 in plan view. The wire intersection portions C of the first wire rod 32 and the second wire rod 34 are arranged around the predetermined portion 22P (see FIG. 3) of the suspension member 22 of the lighting device 20. As shown in FIG.

Here, as shown in FIG. The anti-vibration device 40 has a first tubular member 42 and a second tubular member 44 that intersect each other in plan view. The first cylindrical member 42 is slidably connected to the first wire rod 32 . On the other hand, the second tubular member 44 is slidably connected to the second wire rod 34 . A predetermined portion 22</b>P of the hanging member 22 is attached via an annular member 50 to the intersection of the first tubular member 42 and the second tubular member 44 .

As a result, the second tubular member 44 and the annular member 50 restrict the swinging of the predetermined portion 22P of the suspension member 22 in the direction along the first wire 32 (the direction of the arrow X). In addition, the first tubular member 42 and the annular member 50 restrict the deflection of the predetermined portion 22P of the hanging member 22 in the direction (the arrow Y direction) along the second wire 34 .

As described above, in this embodiment, the anti-vibration member 40 restricts vibration of the predetermined portion 22P of the hanging member 22 in two horizontal directions (arrow X direction and arrow Y direction). Therefore, during an earthquake, the lighting fixture 20 swings with the predetermined portion 22P of the hanging member 22 as a fulcrum. As a result, in the present embodiment, the amplitude of the lighting fixture 20 is smaller than in the case where the lighting fixture 20 swings around the mounting portion to the ceiling (not shown) as a fulcrum. Therefore, contact between adjacent lighting fixtures 20 is suppressed during an earthquake.

Further, as described above, the first tubular member 42 is slidably connected to the first wire 32 and the second tubular member 44 is slidably connected to the second wire 34 . As a result, while tension is applied to the first wire rod 32 and the second wire rod 34, movement of the wire intersection portion C can be suppressed in plan view.

To explain in more detail using a comparative example, as shown in FIG. When the one wire 32 is moved by applying T, the wire intersection C moves in a plan view. As a result, as indicated by the two-dot chain line, the second wire rod 34 may be bent with the wire intersection portion C as a fulcrum, and the position of the second wire rod 34 may be displaced.

Further, if the hanging member 22 follows the movement of the wire crossing portion C, the installation position of the lighting fixture 20 may shift in plan view. Furthermore, when the tension T is applied to the first wire 32 , the second wire 34 resists, so it becomes difficult to apply the tension T to the first wire 32 .

On the other hand, in this embodiment, as shown in FIG. 4, the first tubular member 42 of the anti-vibration device 40 is slidably connected to the first wire rod 32 . In this state, when the tension T is applied to the first wire rod 32 to move the first wire rod 32 , the first wire rod 32 slides with respect to the first cylindrical member 42 . Therefore, the wire crossing portion C is suppressed from moving in plan view.

Therefore, it is suppressed that the second wire rod 34 is bent with the wire intersection portion C as a fulcrum and the second wire rod 34 is displaced. As a result, it is suppressed that the installation position of the lighting device 20 shifts in plan view. Furthermore, when the tension T is applied to the first wire rod 32, the resistance force of the second wire rod 34 is reduced, so that the tension T can be easily applied to the first wire rod 32.

Similarly, the second tubular member 44 of the anti-vibration device is slidably connected to the second wire rod 34 . In this state, when the tension T is applied to the second wire rod 34 to move the second wire rod 34 , the second wire rod 34 slides with respect to the second tubular member 44 . Therefore, the wire crossing portion C is suppressed from moving in plan view.

Therefore, it is suppressed that the first wire 32 is bent with the wire crossing portion C as a fulcrum and the first wire 32 is displaced. As a result, it is suppressed that the installation position of the lighting device 20 shifts in plan view. Furthermore, since the resistance of the first wire 32 is reduced when the tension T is applied to the second wire 34, it becomes easier to apply the tension T to the second wire 34.

As described above, in the present embodiment, while the tension T is applied to the first wire rod 32 and the second wire rod 34, movement of the wire intersection portion C can be suppressed in plan view. Therefore, the deviation of the installation position of the lighting device 20 is suppressed in plan view. Furthermore, workability of the first wire 32 and the second wire 34 is improved.

A first tension applying member 36 is provided on one end side of the first wire rod 32 . A second tension applying member 38 is provided on one end side of the second wire rod 34 . The tension T applied to the first wire rod 32 and the second wire rod 34 can be easily adjusted by the first tension applying member 36 and the second tension applying member 38 .

Furthermore, in this embodiment, the anti-vibration device 40 is slidably attached to the hanging member 22 .

Here, when the tension T is applied to the first wire rod 32 and the second wire rod 34, the wire rod intersection portion C and the anti-vibration member 40 provided at the wire rod intersection portion C are lifted. At this time, as in the comparative example shown in FIG. The suspension material 22 and the lighting fixture 20 may rise so that the installation height of the lighting fixture 20 may shift.

On the other hand, in this embodiment, as described above, the anti-vibration member 40 is slidably attached to the hanging member 22 . Thereby, when tension T is applied to the first wire rod 32 and the second wire rod 34 and the wire crossing portion C and the vibration damping device 40 are raised, the vibration damping device 40 slides upward along the hanging member 22. . As a result, lifting of the hanging member 22 and the lighting fixture 20 is suppressed. Therefore, upward displacement of the installation height of the lighting device 20 is suppressed.

The annular member 50 also has an attachment wire 52 and a connector 54 that connects both ends of the attachment wire 52 . Thereby, the predetermined portion 22P of the hanging member 22 can be easily attached to the crossing portion of the first tubular member 42 and the annular member 50 by the annular member 50 . Therefore, workability is improved.

(Modification)
Next, a modification of the above embodiment will be described.

In the above-described embodiment, the annular member 50 is formed by an attachment wire 52 such as a wire. However, the annular member may be formed of, for example, a resin or rubber wire rod or a band-shaped member (belt-shaped member). Furthermore, the annular member 50 may be formed of a rigid frame-shaped member (claimed member).

Further, as in a modification shown in FIG. 6, the vibration damping member 60 may be provided with a third tubular member 62 in place of the annular member 50 . Specifically, the third cylindrical member 62 is formed of, for example, a metal pipe (metal pipe). The third cylindrical member 62 is arranged vertically. That is, the third cylindrical member 62 is arranged with its central axis vertical.

The third tubular member 62 is arranged beside the intersection of the first tubular member 42 and the second tubular member 44, and is joined to the first tubular member 42 and the second tubular member 44 by welding or the like. It is The suspending member 22 of the lighting device 20 is slidably inserted inside the third cylindrical member 62 . In other words, the third tubular member 62 is slidably connected to the hanging member 22 . As a result, the third tubular member 62 slides upward along the hanging member 22 when the tension is applied to the first wire rod 32 and the second wire rod 34 and pulled up, as in the above-described embodiment. Therefore, upward displacement of the installation height of the lighting device 20 is suppressed.

Further, in the above-described embodiment, the intersection of the first tubular member 42 and the second tubular member 44 of the anti-vibration device 40 is connected to the hanging member 22 via the annular member 50 so as to be relatively displaceable in the vertical direction. there is However, the first tubular member 42 and the second tubular member 44 may be fixed to the hanging member 22 by, for example, binding wires, binding bands, or the like. In this case, when the tension T is applied to the first wire rod 32 and the second wire rod 34, the installation position of the lighting device 20 is prevented from shifting in plan view.

It should be noted that even if the hanging member 22 is fixed to the first tubular member 42 and the second tubular member 44 after the vibration damping member 40 is positioned around the predetermined portion 22P of the hanging member 22, the lighting fixture 20 is suppressed.

Moreover, in the above embodiment, the first tubular member 42 and the second tubular member 44 are formed in a cylindrical shape. However, the first tubular member and the second tubular member may be formed in a tubular shape with a rectangular cross section, for example. In addition, the first connecting portion and the second connecting portion are not limited to the first tubular member 42 and the second tubular member 44, and for example, ring-shaped members slidably connected to the first wire rod 32 and the second wire rod 34. It may be a member, or a hook-shaped member or the like that is slidably and detachably connected to the first wire 32 and the second wire 34 .

Moreover, in the above-described embodiment, the first support portion and the second support portion are the walls 14X and 14Y. However, the first support and the second support may be walls, structural members such as columns, beams, slabs, or a combination of these structural members.

Moreover, in the above embodiment, the hanging structure 30 is applied to the plurality of lighting fixtures 20 . However, the suspension structure 30 according to the above embodiment can be applied to at least one lighting fixture 20 .

Moreover, although the hanging structure 30 according to the above embodiment is applied to the existing lighting equipment 20, it can also be applied to a newly installed lighting equipment.

Moreover, in the above-described embodiment, the hanging object is the lighting fixture 20 . However, the suspended object is not limited to the lighting equipment 20, and may be, for example, a ceiling material, a projection screen, an exhibit, a design object, or the like.

Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be used in combination as appropriate. It goes without saying that various aspects can be implemented without departing from the scope.

14X wall body (first support part)
14Y wall body (second support part)
20 Lighting fixture 22 Suspension member 30 Suspension structure 32 First wire rod 34 Second wire rod 36 First tension applying member 38 Second tension applying member 40 Anti-vibration device 42 First tubular member 44 Second tubular member 50 Annular member 60 Vibration Stopper C intersection (intersection of the first wire and the second wire)

Claims (4)

a first wire stretched between the first supporting parts;
a second wire stretched between the second support portions and crossing the first wire in a plan view;
a hanging object suspended by a hanging material and arranged around the intersection of the first wire and the second wire in a plan view;
A first connecting portion slidably connected to the first wire and a second connecting portion slidably connected to the second wire, provided at the intersection, A vibration restraint attached to the hanging material or the suspended object;
Suspended structure with The anti-vibration tool is slidably attached to the hanging member,
The suspension structure according to claim 1. a first tension applying member provided on the first wire and applying tension to the first wire;
a second tension imparting member provided on the second wire and imparting tension to the second wire;
comprising
The suspended structure according to claim 1 or 2. The anti-vibration tool is
a first tubular member as the first connecting portion into which the first wire is slidably inserted;
a second tubular member that intersects with the first tubular member in a plan view and is joined to the first tubular member and serves as the second connecting portion into which the second wire rod is slidably inserted;
an annular member that is hung on the intersection of the first tubular member and the second tubular member and surrounds the hanging member;
The suspension structure according to any one of claims 1 to 3.

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