KR101173683B1 - Supporting Apparatus for a construction - Google Patents

Abstract

PURPOSE: A support device for a structure is provided to reduce the height and size of an elastic bearing by absorbing a horizontally applied load using a friction applying unit. CONSTITUTION: A support device(100) for a structure comprises a lower member(110), an upper member(130), first and second arm members(150,160), friction applying units(170), and a load support unit(180). The lower member is fixed to a support structure. The upper member is fixed to the bottom surface of an upper structure which supports the support structure. The first arm members are installed on the lower member to be horizontally rotatable around first joints. The second arm members are installed on the upper member to be horizontally rotatable around second joints and are connected to the first arm members through third joints. The friction applying units are installed on the third joints and absorb a load horizontally applied to the upper structure. The load support unit is installed between the lower and upper members and support the load of the upper structure to the support structure.

Description

Supporting Apparatus for a construction}

The present invention relates to a structure supporting apparatus, and in particular, a structure which is installed between an upper structure and a bridge of a bridge to support a load of the upper structure, and a structure that can be suitably used to flexibly receive horizontal displacement between the upper structure and the bridge. It relates to a support device.

In general, a bridge has an upper structure for allowing a vehicle, a train, or a person to pass through, and a pier supporting the upper structure on the ground, and a bridge device, which is a structural support device, is installed between the upper structure and the pier.

Some bridge units for fixed structures support the upper structures on the bridges, but the loads in the horizontal direction acting on the superstructures and the bridges by the acceleration, sudden stop, or earthquake of cars or trains are resilient to the change of temperature. There is also a movable stage bridge device that allows the relative movement of the superstructure and the piers according to the expansion and contraction of the superstructure as well as to support the vertical load of the superstructure.

As a device for moving stages, a rubber elastic support having a metal plate inserted therein is frequently used. The rubber elastic bearing is generally deformed to about 150% of its thickness when shear deformation in the horizontal direction occurs to resist shear deformation. The bridge device using the rubber resilient bearing elastically receives the various loads applied to the upper structure, that is, the load of the bridge itself, the dynamic load caused by the acceleration or sudden stop of the vehicle or train, and the impact of the earthquake, thereby improving the durability of the bridge. Play a role.

However, the rubber elastic bearing as described above has a disadvantage of allowing a large horizontal displacement of the upper structure even with a small horizontal force acting on the upper structure because the resistance to the shear deformation in the horizontal direction is small. In this case, since the safety of the bridge is lowered, a problem arises in that a large number of bridge devices must be installed.

The larger problem of the rubber elastic support is that as the displacement in the horizontal direction increases, not only the load bearing capacity decreases rapidly but also the height decreases, so that the bridge may collapse due to the height variation of the superstructure.

In addition, when the seismic force or wind load acts asymmetrically on the side of the superstructure, the superstructure of the bridge receives a rotational force. In this case, the torsion stress acts on the elastic bearing supporting the upper structure, and the elastic bearing may be easily broken because the strength of the elastic bearing is very small.

In addition, in the case of a conventional LRB (Lead Rubber Bearing) having a load absorbing capacity, if the dynamic displacement is continued, the structure inside the LRB is damaged, so that the load absorbing capacity is lowered and the possibility of replacement after an earthquake is raised.

This is illustrated by comparing the pre-test and post-test photos below for dynamic displacement of the LRB.

[Reference Figure 1] LRB photo before exam

[Reference Figure 2] LRB picture after the test

It is an object of the present invention to provide a structure supporting apparatus having an improved horizontal resistance force compared to a conventional teaching apparatus.

Another object of the present invention is to provide a structure support device that can have a significantly improved horizontal resistance compared to the existing teaching device using a rubber elastic support in particular.

Still another object of the present invention is to provide a structure supporting apparatus having improved torsional resistance compared to a conventional teaching apparatus.

Still another object of the present invention is to provide a structure supporting apparatus having a horizontal resistance force in the axial direction and a horizontal resistance force in the perpendicular direction of the axial direction.

Still another object of the present invention is to provide a structure supporting apparatus which can reduce the risk of the upper structure being detached from the piers due to side reactions while improving the horizontal resistance compared to the conventional teaching apparatus.

Another object of the present invention, if the dynamic displacement in the existing LRB (Lead Rubber Bearing) having a load absorbing capacity is a structure that can solve the problem that the structure inside the LRB is damaged and the load absorbing capacity is reduced and replaced after the earthquake To provide a support device.

Structure support device according to the present invention includes a lower member for installing on a support structure; A first arm member installed on the lower member to pivot in a horizontal direction about the first joint; An upper member for installing on a bottom surface of the upper structure supported by the supporting structure; A second arm which is rotatably installed in the horizontal direction about the second joint part on the upper member and connected to the first arm member so as to be mutually rotatable through a third joint part at a position spaced apart from the first joint part and the second joint part; absence; A load support part disposed between the lower member and the upper member and supporting the load of the upper structure on the support structure; And friction force acting means installed on at least one of the first to third joint parts to apply a frictional force to prevent at least one of the first arm member and the second arm member from rotating in a horizontal direction. Has a configuration.

The frictional force acting means is installed in the third joint portion, the shaft portion for connecting the first arm member and the second arm member to be rotatable and the pressing means for pressing the first arm member toward the second arm member. It is preferable to comprise.

The shaft portion is a bolt having a spiral portion, and the frictional force means is coupled to the spiral portion and the friction material interposed between the first arm member and the second arm member to direct the first arm member toward the second arm member. It is good to have a nut to pressurize.

It is preferable that a sliding member is further provided between the friction material and the first arm member or between the friction material and the second arm member.

More preferably, a pressure plate for pressing the friction material toward the friction material by a friction material and the nut is further provided on the surface opposite to the friction material of the first arm member or the second arm member.

The shaft portion is preferably provided with an elastic member that is pressed toward the first arm member or the second arm member by the nut.

The elastic member is preferably a disk spring.

The frictional force acting means is provided in the first joint portion and the second joint portion, respectively, the shaft portion for supporting the first arm member and the second arm member to the lower member and the upper member so as to rotate in place, respectively, and the first It may be configured to include a pressing means for pressing the arm member and the second arm member toward the lower member and the upper member, respectively.

A spacer and an elastic member are installed between the first arm member and the lower member or between the second arm member and the upper member, and the pressing means is a bolt having a head or a bolt and a nut coupled to the bolt. It is desirable to have.

The first arm member may include two or more layers provided below the second arm member and installed above the second arm member.

The second arm member may include two or more layers provided below the first arm member and installed above the second arm member.

The frictional force acting means may be further installed on any one or both of the first joint portion and the second joint portion.

Structure support device according to the present invention to further increase the load absorbing capacity of the existing bridge device to minimize the displacement during the earthquake, to minimize the displacement during the occurrence of the starting brake load of the train, it can be used as a wind load displacement control device.

Structure supporting device according to the present invention by absorbing the load acting in the horizontal direction by using the friction force action means of the clamp friction damper (Clamp Friction Damper) by reducing the horizontal displacement between the superstructure and the support structure during the earthquake height of the elastic support And small size can be designed.

Structure supporting apparatus according to the present invention can adjust the absorption capacity of the horizontal load by adjusting the friction coefficient of the friction material and the clamping force (clamping force) for the two arm members.

In addition, the structure supporting apparatus according to the present invention can be assembled by combining a small amount of friction force action means in each of the bridge device, such as elastic support, it is possible to reduce the cost for anchorage (Anchorage) without a separate installation space.

In addition, the structure supporting apparatus according to the present invention allows the overall horizontal load transfer of the structure to be made stable by applying different capacities of the frictional force means combined with each elastic support according to the size of the horizontal load to be loaded at the installation position.

In addition, the structure supporting apparatus according to the present invention, in the case of the existing LRB (Lead Rubber Bearing) having a load absorbing capacity, if the dynamic displacement is continued, the structure inside the LRB is damaged, the load absorbing capacity is lowered and the possibility of replacement after the earthquake is raised. It helps to solve the problem.

In addition, the structure supporting apparatus according to the present invention, because the first arm member and the second arm member hold the upper member and the lower member to each other to limit the maximum displacement in the horizontal direction, thereby reducing the risk of breakage and falling of the structure support apparatus. You can stop it.

In addition, the structure supporting apparatus according to the present invention can maintain a predetermined spring force (spring force) even if the friction material is worn to some extent when using a disk spring (Disk Spring) as a friction force action means can obtain a predetermined friction force.

Since the structure supporting apparatus according to the present invention can improve the horizontal resistance force compared to the existing teaching apparatus, it can solve the problems of the existing teaching apparatus while maintaining the advantages of the existing teaching apparatus.

The structure supporting apparatus according to the present invention improves the torsion resistance which was weak in the existing teaching apparatus.

The structure supporting apparatus according to the present invention makes it possible to make a different device for horizontal resistance in the axial direction and the perpendicular direction of the axial direction.

The structure supporting apparatus according to the present invention reduces the risk that the upper structure is separated from the pier by the side reaction force because the first arm member and the second arm member hold the upper member and the lower member.

1 is a perspective view of a structure supporting apparatus according to the present invention,
2 is a front view of the structure supporting apparatus according to the present invention;
3 is a partial cross-sectional view showing a modification of the structure supporting apparatus of FIG.
4 is an enlarged view of the frictional force acting means shown in FIG.
5 is a partially broken plan view of a structure supporting apparatus according to the present invention;
6 is a plan view showing the shape of the ends of the first arm member and the second arm member,
7 is a cross-sectional view of the disk spring described in the previous embodiments,
8 is a front view showing another embodiment of the structure supporting apparatus according to the present invention;
9 is an enlarged view of the friction force applying means,
10 is a cross-sectional view showing another embodiment of a structure supporting apparatus according to the present invention;
11 is a front view showing another embodiment of the structure supporting apparatus according to the present invention;
12 is a plan view illustrating a modification of the connection method between the first arm member and the second arm member.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a structure supporting apparatus according to the present invention, Figure 2 is a front view of the structure supporting apparatus according to the present invention.

As shown in Figures 1 and 2 structure supporting apparatus 100 according to the present invention is provided with a lower member (110). The lower member 110 is for fixing on the supporting structure 10, such as a pier, and is usually made of a metal plate, and is firmly fixed to the supporting structure 10, such as a pier, through the studs 111 and the like.

Structure support device 100 according to the present invention includes an upper member (130). The upper member 130 is a portion fixed to the bottom surface of the upper structure 20 supported by the supporting structure 10, such as a piers. The upper member 130 is also typically made of a metal plate, it is firmly fixed to the bottom of the upper structure 20 through the stud 131.

In some cases, the lower member 110 and the upper member 130 may be supported by the support structure 10 or the upper structure 20 by welding without a stud, other methods such as the foundation bolt and nut, the foundation bolt, or by mixing the stud and other methods. Can be fixed).

Structure supporting apparatus 100 according to the present invention has a first arm member 150 which is installed to be rotated in place in the horizontal direction on the lower member 110 around the first joint (A1). The first arm member 150 is installed in the lower member 110 such that the first arm member 150 can be rotated in place by the bolt B and the cap nut CN in the state of being interposed between the lower member 110 and the spacer SP. It is. The first arm member 150 is preferably made of a strip-shaped iron plate. When the first arm member 150 attempts to rotate about the first joint A1, the frictional force may be adjusted to the degree of fastening of the bolt B and the cap nut CN.

Structure supporting apparatus 100 according to the present invention includes a second arm member 160 installed in the horizontal direction on the upper member 130 around the second joint portion (A2) to be rotated in place. The second arm member 160 is installed in the upper member 130 so that it can be rotated in place by the bolt B and the cap nut CN with a spacer SP between the upper member 130 interposed therebetween. It is. The second arm member 160 is also preferably made of a strip-shaped iron plate. When the second arm member 160 is about to rotate about the second joint portion A2, the frictional force received can be adjusted to the degree of fastening of the bolt B and the cap nut CN.

The second arm member 160 is rotatably connected to the first arm member 150 through the third joint portion A3. The third joint portion A3 is disposed at positions spaced apart from the first joint portion A1 and the second joint portion A2, respectively. The third joint portion A3 is provided with a friction force acting means 170. The friction force acting means 170 acts on the first arm member 150 and the second arm member 160 to act as a friction force that prevents the first arm member 150 and the second arm member 160 from rotating in the horizontal direction. It is to absorb the force acting in the horizontal direction to the upper structure (20).

In the present invention, the frictional force acting means 170 applied to the third joint portion A3 includes a shaft portion 171 and a first arm that connect the first arm member 150 and the second arm member 160 to be rotatable with each other. It has a configuration including a pressing means 172 for pressing the member 150 toward the second arm member 160. As the shaft portion 171, a bolt having a spiral portion 171a is suitable, and penetrates the components interposed between the head 173 and the pressing means 172 made of a nut.

In this embodiment, the pressing means 172 is a nut coupled to the spiral portion 171a for pressing the first arm member 150 toward the second arm member 160.

Preferably, the friction force acting means 170 further includes a friction material 174 interposed between the first arm member 150 and the second arm member 160.

A sliding member 175 may be further installed between the friction material 174 and the first arm member 150. Preferably, the sliding member 175 is fixed to the first arm member 150. In addition, the surface of the friction material 174 on the surface in contact with the second arm member 160 may be roughened so that slippage does not occur between the second arm member 160 and the friction material 174.

Of course, the sliding member 175 may be installed between the friction material 174 and the second arm member 160, or both may be installed. As the friction material 174, a brass material, a metal surface sintered material, a fiber material, a plastic material, or the like may be used. The sliding member 175 may be a stainless steel plate or a chromium plated material.

In the present invention, the first arm member 150, the second arm member 160 and the friction force acting means 170 serves as a friction damper (FD) in a state coupled to each other. The same is true in the following embodiments.

As can be seen in FIGS. 1 and 2, the sliding member 175, the friction material 174, the pressure plate 176, and the disk spring 177 are overlapped in order from the lower surface of the first arm member 150 and the shaft portion 171. In the state in which the reinforcing plate 178 is respectively coupled to the top and bottom of the squeezing force, fastening means 172, which is a nut, is connected to the spiral portion 171a to allow the components between the two reinforcing plates 178 to be pressed. . Instead of the disk spring 177, another elastic member may be mounted.

As described above, the first arm member 150, the second arm member 160, and the frictional force acting means 170 may be installed at both front and rear, left and right sides, or front and rear and left and right sides of the structure support apparatus 100. have.

In some cases, the first arm member 150, the second arm member 160, and the frictional force acting means 170 may be installed only on one side of the structure support apparatus 100.

The load supporting part 180 is installed between the lower member 110 and the upper member 130. As the load supporting part 180, a rubber elastic support can be suitably used.

The structure supporting apparatus 100 according to the present invention as described with reference to FIGS. 1 and 2 can adjust the magnitude of the horizontal resistance force to increase by adjusting the type and quantity of the friction material 174 and the number of installation of the friction damper (FD). have.

3 is a partial cross-sectional view showing a modification of the structure supporting apparatus of FIG. 1, and FIG. 4 is an enlarged view of the friction force applying means shown in FIG.

As shown in FIG. 3, the lower member 110 and the upper member 130 have spiral nuts BS formed at both ends of the foundation nut 30 installed at the support structure 10 or the upper structure 20 such as a piers. Through the nut (N) coupled to the bolt (B) and the spiral (BS) can be fixed to the support structure 10 or to the bottom of the upper structure 20, respectively.

Here, the bolt (B) and the nut (N) as a component of the friction force acting means 170, and serves as the shaft portion 171 and the pressing means 172. Accordingly, the bolt B forms the first joint portion A1 or the second joint portion A2.

At this time, the first arm member 150 is a bolt (B) for fixing the lower member 110 to the support structure 10 with a spacer SP made of steel between the lower member 110 preferably. ) Is rotatably installed on the lower member 110 through the nut (N). A sliding member SM may be installed on a bottom surface of the first arm member 110 in contact with the spacer SP.

 The second arm member 160 is a bolt (B) and a nut for fixing the upper member 130 to the upper structure 20 with a spacer SP made of steel, preferably between the upper member 130. It is rotatably installed on the upper member 130 through (N). A sliding member SM such as PTFE may be installed on an upper surface of the second arm member 160 contacting the spacer SP.

A washer W is mounted between the nut N and the first arm member 150 and between the nut N and the second arm member 160.

As the load supporting part 180 installed between the lower member 110 and the upper member 130, a rubber elastic support having a metal plate 183 disposed in a multi-layer spaced up and down in the rubber 181 is used. Of course, a lead pillar disposed up and down inside the rubber elastic support may be installed.

The friction force acting means 170 provided on the third joint portion A3 has a nut N as a pressing means coupled to the shaft portion 171 having the spiral portions 171a formed at both ends and the spiral portions 171a at both ends. And a friction material 174 and a sliding member 175 interposed between the first arm member 150 and the second arm member 160.

The magnitude of the frictional force acting between the friction material 174 and the sliding member 175 is calculated as F = 2 mu N. Where μ is the coefficient of friction and N is the pre-tension load.

In the structure supporting apparatus 100 shown in FIGS. 2 to 4, double friction occurs between the friction member 174 and the sliding member 175 that are installed in a double manner when the upper member 130 is moved horizontally with respect to the lower member 110. .

In addition, the frictional force acting means 170 overlaps the sliding member 175, the friction material 174, the pressure plate 176 and the disk spring 177 in order from the upper surface of the second arm member 160, and the shaft portion 171. Fastening the nuts (N) to both ends of the spiral portion 171a in a state in which the reinforcing plate 178 is coupled to the top and bottom of the respective components so that the components between the two reinforcing plate 178 is pressed. The shaft portion 171 penetrates the components interposed between the two nuts N on the upper and lower sides.

Structure supporting apparatus 100 according to the present invention is provided between the lower member 110 and the upper member 130 is provided with a load supporting portion 180 for supporting the load of the upper structure 20 to the support structure (10). . In this embodiment, although the use of rubber elastic bearings is disclosed as the load support unit 180, a disc bearing, a pot bearing, a spherical bearing, an Alzwason company EQS (Eradi Quake System), etc. The load bearing portion can be configured in the same way as in the device.

5 is a partially broken plan view of a structure supporting apparatus according to the present invention.

As can be seen in Figure 5, through the second joint portion (A2) to the first arm member 150 and the upper member 130 which is installed to rotate in place through the first joint portion (A1) on the lower member (110). The second arm member 160 installed to rotate in place is rotatably connected to each other through the friction force acting means 170 in the third joint portion A3 to have a V shape.

In FIG. 5, when the initial resistance in the left and right directions due to the frictional force is set to be large, the angle α between the first arm member 150 and the second arm member 160 is set to a large value and the initial resistance is set to be small. , the size of α is set small. This initial resistance helps the horizontal resistance of the load supporting portion 180 in the left and right directions.

6 is a plan view illustrating the shapes of ends of the first arm member and the second arm member.

Dumbbell-shaped end portions of the first arm member 150 and the second arm member 160 to increase the friction force of the friction material 174 acting on the first arm member 150 and the second arm member 160 described above. This area can be largely configured. In the central portion of the end portion, a hole H for passage of the shaft portion is formed.

7 is a cross-sectional view of the disk spring described in the previous embodiments.

Here, De is the outer diameter of the disk spring 177, Di is the inner diameter of the disk spring 177, t is the thickness of the disk spring 177, ho is the height of the disk spring 177, s is deflection (Deflection) Represent each.

In the present invention, it is preferable to use a disk spring 177 with ho / t = 1.5 and s / ho = 0.5-1. At this time, the ratio of De and Di may vary for each size, in the present invention is preferably in the range of Di / De = 0.32 ~ 0.51.

The disk springs 177 may be used by overlapping several in the same direction or in different directions.

8 is a front view showing another embodiment of the structure supporting apparatus according to the present invention, Figure 9 is an enlarged view of the frictional force acting means.

As can be seen in FIGS. 8 and 9, two second arm members 160 may be installed at intervals up and down with the first arm member 150 interposed therebetween. In this case, one end of the two second arm members 160 is provided with spacers SP interposed between the upper member 130 and the upper second arm member 160 and between the two second arm members 160, respectively. In place, the bolt B and the cap nut CN are rotatably installed in the upper member 130.

One end of the first arm member 150 is installed to be rotated in place on the lower member 110 through the bolt (B) and the cap nut (CN) with the spacer (SP) between the lower member (110). have.

The other end of the first arm member 150 and the other end of the two second arm members 160 are rotatably connected to each other through the shaft portion 171 of the friction force acting means 170.

The friction force acting means 170 is a friction member 174 and a sliding member interposed between the shaft portion 171 of the high-strength bolt and the anti-loosening double nut DN, the first arm member 150 and the second arm member 160. 175, the disc springs 177 disposed on the upper second arm member 160, and the reinforcement plate 178 disposed inwardly of the bolt head 173 and the double nut DN.

As shown in FIGS. 8 and 9, when the structure supporting apparatus 100 is configured, since the slip is generated twice, the wear amount of the friction material 174 may be reduced, thereby improving durability.

In contrast to FIGS. 8 and 9, the first arm member 150 is disposed on the upper and lower sides of the second arm member 160 using two first arm members 150 and one second arm member 160, respectively. It can be configured to.

Furthermore, both the first arm member 150 and the second arm member 160 may be installed at two or more spaced intervals. The first arm member 150 and the second arm member 160 are preferably installed alternately up and down.

The rest is as described with reference to FIGS. 1 to 7.

10 is a cross-sectional view showing another embodiment of a structure supporting apparatus according to the present invention.

The friction member 174 and the sliding member 175 are interposed between the first arm member 150 and the second arm member 160 of the third joint portion A3 to be coupled with a bolt and a nut N. Friction forces may be applied to each other during horizontal rotation between the first arm member 150 and the second arm member 160.

In some cases, in the third joint portion A3, the first arm member 150 and the second arm member 160 are freely connected to each other, and a frictional force acts on the first joint portion A1 or the second joint portion A2. Means 170 may be installed.

In the third joint portion A3, when the first arm member 150 and the second arm member 160 are freely connected to each other, the friction force acting means may be applied to both the first joint portion A1 and the second joint portion A2. 170 is preferably installed.

In the frictional force acting means 170 installed on the second joint portion A2, a friction material 174 and a reinforcement plate 178 are interposed between the head BH of the bolt B and the second arm member 160. The disk spring 177 and the reinforcement plate 178 are respectively provided between the second arm member 160 and the upper member 130. The vertical arrangement of the first arm member 150 or the like in the first joint portion A1 may be configured in the same manner as in the second joint portion A. FIG.

In addition, in some cases, the structure supporting apparatus 100 according to the present invention may be configured by installing the frictional force acting means 170 on all of the first joint A1, the second joint A2, and the third joint A3. Can be.

When the frictional force acting means 170 is installed in only one of the first joint part A1 and the second joint part A2, the frictional force acting on the first arm member 150 and the second arm member 160 The friction force is not balanced, but because it is transmitted to the other arm member through the first arm member 150 or the second arm member 160 is not a problem.

The rest is as described with reference to FIGS. 3 and 4.

Figure 11 is a front view showing another embodiment of the structure supporting apparatus according to the present invention.

The structure support apparatus 100 of FIG. 11 shows that the disk support is used as the load support 180. The load supporting unit 180 includes a friction block 188 in which a pin 186 is fixed to a polyurethane disk 185 and a bottom surface thereof, and a sliding member 187 made of PTFE or the like is fixed to an upper surface thereof.

In this case, a sliding member 189 formed of a stainless steel plate is preferably provided on the bottom of the upper member 110, and a pin hole 115 is provided in the lower member 110. The lower end of the pin 186 is inserted into this pin hole 115. Accordingly, rotation of the friction block 188 before and after or left and right is allowed, and movement in the horizontal direction is prevented.

1 to 11, the structure supporting apparatus 100 according to the present invention has a rubber support, disk bearings, pot bearings (pot bearings), spherical bearings, other types of load support unit 180, such as EQS It can be seen that it can also be implemented. Structure support device 100 according to the present invention is not limited to the type of the load support (180).

12 is a plan view illustrating a modification of the connection method between the first arm member and the second arm member.

In some cases, the first arm member 150 and the second arm member 160 of the friction damper FD used in the present invention may be rotatably connected to each other through the connection member CM. In this case, preferably, the first joint portion A1 and the second joint portion A2 are each one, and the third joint portion A3 is formed two. Preferably, the frictional force acting means 170 is installed on each of the two third joint portions A3.

The structure supporting device according to the present invention can be most suitably used as a bridge device, and can be used to support the superstructure of other buildings other than the bridge on the support structure below it.

10: support structure 20: upper structure
100: structure support device 110: lower member
130: upper member 150: first arm member
160: second arm member 170: friction force acting means
180: load support part FD: friction damper

Claims (12)

A lower member for installation on a support structure;
A first arm member installed on the lower member to pivot in a horizontal direction about the first joint;
An upper member for installing on a bottom surface of the upper structure supported by the supporting structure;
The upper member is rotatably installed in a horizontal direction with respect to the second joint part, and is connected to the first arm member so as to be rotatable with each other through a third joint part at a position spaced apart from the first joint part and the second joint part. When the upper member is horizontally displaced in a linear direction with respect to the member, the upper member is rotated in a horizontal direction about the second joint part by interaction with the first arm member through the third joint part, and thus the first joint part is centered on the first joint part. A second arm member for rotating the first arm member in a horizontal direction;
A load support part disposed between the lower member and the upper member and supporting the load of the upper structure on the support structure; And
And at least one of the first joint part and the third joint part, and including friction force acting means for exerting a frictional force that prevents at least one of the first arm member and the second arm member from rotating in the horizontal direction. Structure supporting device characterized in that. According to claim 1, wherein the frictional force acting means is installed in the third joint portion, the first arm member and the shaft portion for connecting the second arm member so as to be mutually rotatable and the first arm member to the second arm member Structure supporting device comprising a pressing means for pressing toward. 3. The shaft of claim 2, wherein the shaft portion is a bolt having a spiral portion, and the frictional force acting means is coupled to the spiral portion and the friction material interposed between the first arm member and the second arm member to connect the first arm member. And a nut pressurizing toward the second arm member. 4. The structure supporting apparatus according to claim 3, wherein a sliding member is further provided between the friction material and the first arm member or between the friction material and the second arm member. 4. The structure supporting apparatus according to claim 3, wherein a pressure plate for pressing the friction material toward the friction material by a friction material and the nut is further provided on an opposite surface of the friction material of the first arm member or the second arm member. . 4. The structure supporting apparatus according to claim 3, wherein the shaft portion is further provided with an elastic member pressed by the nut toward the first arm member or the second arm member. 7. The structure supporting apparatus according to claim 6, wherein the elastic member is a disk spring. According to claim 1, wherein the frictional force acting means is respectively provided in the first joint portion and the second joint portion, and support the first arm member and the second arm member to the lower member and the upper member, respectively, in place pivotable And an urging means for pressing the shaft portion and the first arm member and the second arm member toward the lower member and the upper member, respectively. The method of claim 8, wherein the spacer and the elastic member is provided between the first arm member and the lower member or between the second arm member and the upper member, the pressing means is a bolt having a head or a bolt and the Structure support device, characterized in that it has a nut coupled to the bolt. 4. The structure supporting apparatus according to claim 3, wherein the first arm member is disposed below the second arm member and is disposed above the second arm member. 4. The structure supporting apparatus according to claim 3, wherein the second arm member is disposed below the first arm member and disposed above the second arm member. 3. The structure supporting apparatus according to claim 2, wherein the frictional force acting means is further installed on one or both of the first joint portion and the second joint portion.

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