JP2003090013A - Structure bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that not only manufacture is complicated because a large number of sliding members are installed but also mounting workability is deteriorated because the sliding members are pressed in by a cold fit and durability is degraded because surface pressure is increased and the sliding members are abraded at an early stage in the sliding members in addition to them. SOLUTION: In a bearing device for a structure in which a receiving surface 2a with the concave spherical surface of an upper bearing member 2 and a receiving surface 3a with the concave spherical surface of a lower bearing member 3 are faced oppositely and arranged up and down and a body of revolution 4 in which upper and lower bearing surfaces 4a and 4b have convex spherical surfaces respectively and are formed in a flat shape is interposed between both receiving surfaces 2a and 3a, recesses 4d having a shape forming parts of a spherical body are formed to approximately the whole surfaces of either one of the bearing surfaces 4a and 4b and the receiving surfaces 2a and 3a, and a skid 23 is fixed and mounted by an adhesive 24 under the state that the slid is fitted into the recesses 4d, and brought into surface- contact with the others of the bearing surfaces 4a and 4 and the receiving surfaces 2a and 3a by a friction coefficient of 0.005 to 0.4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support device for a structure, and more particularly to a support device for a structure which exerts a stable seismic isolation action on bridges, buildings and other structures in cold regions.

[0002]

2. Description of the Related Art As conventional support devices for structures, those described in, for example, Utility Model Registration No. 2586794, Japanese Patent Application Laid-Open Nos. 9-88012 and 9-210129 are known. In both of these, the receiving surface having the concave spherical surface of the upper supporting member and the receiving surface having the concave spherical surface of the lower supporting member are arranged facing each other, and the upper and lower supporting surfaces each have a convex spherical surface and are flat. It is a support device for a structure in which a rotating body that forms a member is interposed between both receiving surfaces, and relative movement between an upper support member and a lower support member is performed while rotating the rotating body. Since these bearing devices do not use rubber as a main component, they have the characteristic that spring rigidity does not depend on temperature and stable seismic isolation can be obtained even when the temperature range in the operating environment is large. Have

In the structure supporting device described in JP-A-9-210129, a plurality of sliding members are provided on each of the receiving surface of the upper supporting member and the receiving surface of the lower supporting member. The upper and lower support surfaces of the rotating body are arranged so as to be partially embedded, and are in sliding contact with the sliding member. On the other hand, the upper and lower support surfaces of the rotating body are formed by top finishing, and are plated with stainless steel or hard chrome if necessary.

The receiving surface of the upper supporting member and the receiving surface of the lower supporting member are formed as shown in FIGS. That is, as shown in FIG. 11, the receiving surface 5 of the upper support member 50.
0a and the receiving surface 51a of the lower support member 51 are each primarily machined into a spherical surface by a lathe, and a large number of embedding holes 50b and 51b are bored as shown in FIG. On the other hand, a PTFE round bar 52 as shown in FIG. 14 is cut into a predetermined length and the outer shape is finished to form a short tubular block-shaped sliding member 53 as shown in FIG.
Each sliding member 53 is formed with a slit 53a for air release, which is enlarged and shown in FIG.

Then, the sliding member 53 is crimped to the holes 50b and 51b of the receiving surfaces 50a and 51a by cold fitting. After that, secondary machining is performed so that the inner surfaces of the large number of sliding members 53 of the receiving surfaces 50a and 51a each form one spherical surface, and the upper supporting member 50 and the lower supporting member 51 shown in FIG. 13 are obtained.

However, in such a conventional support device for a structure, since a plurality of sliding members 53 are attached through the above steps, not only the manufacturing is complicated but also the sliding members 53 are mounted. Since it is press-fitted by cold fitting, the workability of installation is poor. In addition, the sliding member 53 is provided on both receiving surfaces 50 in order to stably hold the sliding member 53 and to secure the mounting workability.
a, 51a can be arranged only in an area of about 40 to 50%, the surface pressure at the time of bearing of the structure becomes high, and it has a technical problem of being inferior in durability because it wears off early. There is.

[0007]

The present invention has been made in view of the above-mentioned conventional technical problems, and the structure thereof is as follows.
It is as follows. According to the invention of claim 1, the receiving surface 2a having the concave spherical surface of the upper supporting member 2 and the receiving surface 3a having the concave spherical surface of the lower supporting member 3 are arranged to face each other, and the upper and lower supporting surfaces 4a and 4b are The rotating body 4 having a convex spherical surface and having a flat shape is interposed between the receiving surfaces 2a and 3a.
In a support device for a structure in which the upper support member 2 and the lower support member 3 move relative to each other while slidingly rotating, the sliding surface of one of the support surfaces 4a, 4b and the receiving surfaces 2a, 3a. A single recess 4d having a shape forming a part of a hollow sphere is formed on the entire surface thereof, and a lubricant 23 is provided by being fixed to the recess 4d by an adhesive agent 24 while being fitted in the recess 4d. ,
A bearing device for a structure, which is in surface contact with the other of the support surfaces 4a, 4b and the receiving surfaces 2a, 3a with a predetermined friction coefficient. According to the second aspect of the present invention, the receiving surface 2a of the upper supporting member 2 having the concave spherical surface and the receiving surface 3a of the lower supporting member 3 having the concave spherical surface are arranged facing each other, and the upper and lower supporting surfaces 4a and 4b are A flat rotating body 4 having a convex spherical surface is interposed between the receiving surfaces 2a and 3a, and the upper supporting member 2 and the lower supporting member 3 are relatively slid while rotating the rotating body 4. In the support device for a structure to be moved, a recess 4d having a shape forming a part of a hollow sphere is formed on one of the sliding surfaces of the supporting surfaces 4a, 4b and the receiving surfaces 2a, 3a, and The sliding member 23 is fixedly provided with an adhesive 24 in a state of being fitted in the recess 4d, and the supporting surface 4
a, 4b and the other of the receiving surfaces 2a, 3a are brought into surface contact with a predetermined friction coefficient, and the lubricant 23 is attached to the PTFE plate 33.
With a material such as a metal mold 34,
35 is a support device for a structure, which is characterized by being molded using 35. According to the invention of claim 3, the supporting surface 4a,
4b and the other sliding surface of the receiving surface 2a, 3a,
The stainless steel plate 41 is formed by welding, and the lubricant 23
Is in sliding contact with the stainless plate 41, and the structure support device according to claim 1 or 2.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 10 show an embodiment of a structure support device according to the present invention. In the figure, reference numeral 1 indicates a seismic isolation element, and the seismic isolation element 1 has an upper support member 2, a lower support member 3 and a rotating body 4 that slides while rotating within a predetermined angle range as shown in FIG. ing. The upper support member 2 is made of a rigid body (for example, metal (steel)), the receiving surface 2a forming a part of a concave spherical surface having a radius R is formed in a circular shape, and the lower support member 3 is made of a rigid body (for example, Metal (steel))
The receiving surface 3a, which is a part of a concave spherical surface having a radius R, is formed in a circular shape, and is arranged vertically with the receiving surfaces 2a and 3a facing each other.

Further, the rotating body 4 is basically formed by a rigid body, and the upper and lower surfaces form supporting surfaces 4a and 4b which are each a part of a convex spherical surface having a radius R, and have a flat shape. Each support surface 4a, 4b is formed by the lubricant 23.
That is, the rotating body 4 has a main body 4c made of a rigid body (for example, metal (steel)) and a lubricant 23 provided on the vertically convex spherical surface of the main body 4c and having a smaller friction coefficient value than the main body 4c. Each sliding surface is formed by the material 23.

Specifically, as shown in FIGS. 3, 4 and 7, a recess 4d having a circular outer shape is formed in each of the upper and lower support surfaces 4a and 4b of the main body 4c of the rotating body 4 as a primary machine. Formed by processing. Each recess 4d has a body 4 having a circular outer shape.
It has a single shape which is formed excluding the outer peripheral edge of c and forms a part of a hollow sphere. Therefore, a step surface 4e is formed in an annular shape at a predetermined height on the outer peripheral portion of the recess 4d, as shown in FIGS.

On the other hand, the lubricant 23 is made of a PTFE plate 33 (polytetrafluoroethylene plate) having a circular shape and a predetermined thickness (about 5 mm) shown in FIG. 5, and the PTFE plate 33 is placed on top as shown in FIG. -Mold using the lower molds 34 and 35. The lower mold 35 has a mold surface forming a part of a convex spherical surface, and the upper mold 34 has a mold surface forming a part of a concave spherical surface. The PTFE plate 33 is sandwiched between the lower mold 35 and the upper mold 34, pressed while being heated, and molded into a shape forming a part of a hollow sphere having a circular outer shape, to obtain a lubricant 23. The lubricant 23 has a shape that matches the recess 4d of the rotating body 4, and has the same diameter as the recess 4d of the rotating body 4 or slightly larger than the recess 4d in order to ensure reception in the recess 4d. The diameter is a small diameter D (transmission diameter).

Next, with the main body 4c and the pair of lubricants 23 positioned as shown in FIG. 7, each recess 4d of the main body 4c and the lubricant 2 are formed.
An adhesive 24 such as an epoxy resin is applied to at least one of the grooves 3, and a single lubricant 23 is fitted into each recess 4d and bonded. At this time, as shown in FIG. 8, the bonding jig 40 is used to pressurize and fix. The bonding jig 40 can be composed of a pair of the upper mold 34.

Further, as shown in FIG. 3, a stainless steel plate 41 is welded and fixed to the receiving surface 2a of the upper supporting member 2 and the receiving surface 3a of the lower supporting member 3 to form a sliding surface as required. . The stainless steel plate 41 forms the receiving surfaces 2a and 3a having a concave spherical surface to prevent rusting of the sliding surface and reduce the friction coefficient appropriately. Spherical contact between the sliding surfaces made of the receiving surfaces 2a, 3a (stainless steel plate 41) of the upper and lower support members 2, 3 and the sliding surfaces made of the supporting surfaces 4a, 4b (lubricant 23) of the rotating body 4. Coefficient of friction is 0.005
A range of 0.4 is desirable.

The annular step surface 4e formed on the outer peripheral portion of each recess 4d is set to be equal to or less than the thickness of the lubricant 23 so that the main body 4c directly contacts the receiving surfaces 2a, 3a, that is, the stainless steel plate 41. To prevent. Further, the outer shape of the lubricant 23 has the same diameter as the recess 4d of the rotating body 4 or a diameter slightly smaller than the recess 4d, so that air flows out from the vicinity of the step surface 4e at the outer peripheral portion of each recess 4d. Therefore, as shown in FIG. 4, it is fixed to the main body 4c through a layer of the adhesive 24 without interposing air between the recesses 4d. Of course, it is also possible to form an air vent hole for communicating the front and back sides at an appropriate position of the lubricant 23. This layer of adhesive 24 also functions as a cushioning material. A slight layer of the adhesive 24 between the stepped surface 4e on the outer peripheral portion of each recess 4d and the lubricant 23 also functions as a cushioning material.

Next, the surface layer of the lubricant 23 fixed to the main body 4c via the adhesive 24 is machined to form a spherical surface. In this way, since the lubricant 23 is fixed to each recess 4d via the adhesive 24, the structure 11 is supported even if the surface of each recess 4d is slightly rough. There is no practical problem above.

Such a seismic isolation element 1 is used by being interposed between a foundation 10 such as a foundation and a structure 11 such as a bridge or a building as shown in FIG. That is, the lower support member 3 is fixedly mounted on the base 10 using the foundation bolts 44 so that the receiving surface 3a faces upward, and the lower surface of the structure 11 has the receiving surface 2a.
The upper supporting member 2 is fixed so that a faces downward, and the receiving surface 2a of the upper supporting member 2 and the receiving surface 3a of the lower supporting member 3 are arranged to face each other. And both receiving surfaces 2a, 3a
The support surfaces 4a and 4b are received in the and the rotating body 4 is closely interposed. Reference numeral 54 denotes a stopper, which is fixed to the upper end portion of the lower support member 3 by a bolt 25 and faces the side surface of the upper support member 2 with a predetermined gap.

The structure 11 is supported by a plurality of (four or more front, rear, left and right) seismic isolation elements 1. The upper and lower support members 2 and 3 of each seismic isolation element 1 have a predetermined space due to the interposition of the rotating body 4.

Next, the operation will be described. In a normal state without an earthquake, as shown in FIG. 9, only the vertical force V due to the load of the structure 11 acts and the upper support member 2 descends to a stable state. The load of the structure 11 is supported on the lower support member 3 side via the rotating body 4.

In this state, when the horizontal force H'from the earthquake acts on the lower support member 3 via the base 10 leftward in the figure, the horizontal force H is applied to the upper support member 2 as shown in FIG. The upper support member 2 starts moving relative to the lower support member 3 to the right. The relative movement of the upper support member 2 is continuously performed while rotating the rotating body 4 in a predetermined angle range in the counterclockwise direction. At this time, with the horizontal movement of the upper support member 2, the upper support member 2 slightly rises from the original stable position. Rotating body 4
Can be rotated until the stopper 24 contacts the side surface of the upper support member 2.

In this way, the horizontal support force 2 acting on the upper support member 2 due to the earthquake is absorbed, that is, the vibration is absorbed while the upper support member 2 on which the vertical force V acts moves upward together with the structure 11. It Thus, the structure 11 and the base 10
A plurality of seismic isolation elements 1 are interposed between and to construct a structure support device, thereby lengthening the natural period of the structure 11 to prevent resonance and transfer to the structure 11 with an earthquake. The energy (impact force) coming can be suppressed.

In the sliding rotation of the rotating body 4, the frictional force existing between the receiving surfaces 2a, 3a and the supporting surfaces 4a, 4b acts as a resistance against the rotation of the rotating body 4. Due to this frictional force, energy is absorbed while the upper support member 2 is rising, and clockwise sliding rotation of the rotating body 4 when the upper support member 2 is moved downward due to its own weight is suppressed, and the rotating body 4 is rotated. Will be gradually dampened.

In particular, both receiving surfaces 2 of the upper and lower support members 2 and 3
The sliding between a, 3a and the supporting surfaces 4a, 4b of the rotating body 4 is performed by spherical contact between the lubricant 23 made of the PTFE plate 33 and the receiving surfaces 2a, 3a of the upper and lower supporting members 2, 3. Since the sliding is caused by, the friction coefficient is reduced, and the vibration due to the earthquake can be attenuated while smoothly providing the relative movement of the structure 11 with respect to the base 10. If the receiving surfaces 2a and 3a of the upper and lower support members 2 and 3 are formed by the stainless steel plate 41, the friction coefficient due to the spherical surface contact with the lubricant 23 is ensured within the range of 0.005 to 0.4. Can be reduced to

By the way, in the above-mentioned first embodiment,
Although the lubricant 23 is provided on the support surfaces 4a and 4b of the rotating body 4, it is also possible to provide the lubricant 23 on each of the receiving surfaces 2a and 3a of the upper and lower support members 2 and 3 to make the slide surfaces. is there. Lubricant 2
3 has a smaller friction coefficient value than the materials of the upper and lower support members 2 and 3. Further, the stainless steel plate 41 was welded and fixed to both the receiving surfaces 2a and 3a of the upper and lower support members 2 and 3, but the stainless steel plate 41 was attached to the respective support surfaces 4a and 4b of the rotating body 4.
It is also possible to weld and fix the to form a sliding surface.

[0024]

As can be understood from the above description,
According to the present invention, since it does not have temperature dependency as compared with the case of using rubber, it is excellent as a support device for a structure particularly suitable for a cold region.

According to the invention of claim 1, the entire sliding surface of the supporting surface of the rotating body or the receiving surface of the upper and lower supporting members is covered with a lubricant, and the rotating body and the upper and lower supporting members are covered. Since it is possible to give surface contact with the lower support member with a predetermined coefficient of friction,
The smooth sliding movement of the upper support member is maintained during an earthquake. Further, since the entire surface of the sliding contact surface, which is the supporting surface of the rotating body or the receiving surface of the upper and lower supporting members, is covered with the lubricant, a large lubricant is used, and the surface pressure acting on the lubricant is reduced. It is uniform and reduced, and relative sliding between the upper and lower support members and the rotating body is maintained smoothly. As a result, not only the function as the seismic isolation device is satisfactorily obtained, but also the durability of the lubricant is improved.

Since the lubricant is fitted in the recesses formed in the rotating body or the upper and lower support members and fixed by the adhesive, the lubricant can be firmly attached while facilitating the attaching work. . Especially, if the lubricant is provided on the rotor side,
Since the work of attaching the lubricant to the recesses of the upper and lower support surfaces of the individual rotating bodies becomes easy, not only the mounting work but also the parts management becomes easy.

According to the invention of claim 2, in addition to being able to obtain substantially the same effect as that of the invention of claim 1, the sliding member is made of a PTFE plate as a material and has a shape forming a part of a hollow sphere. It is molded using a mold. As a result, it becomes easy to manufacture a lubricant that gives a predetermined coefficient of friction to the surface contact between the rotating body and the upper and lower support members.

According to the third aspect of the present invention, the entire sliding surface of either the supporting surface or the receiving surface is formed by welding a stainless steel plate, and the sliding member is in sliding contact with the stainless steel plate.
As a result, a predetermined friction coefficient of 0.0
It is possible to satisfactorily secure the surface contact between 05 and 0.4.

[Brief description of drawings]

FIG. 1 is a front view showing a seismic isolation element according to an embodiment of the present invention in a half section.

FIG. 2 is a side view showing the seismic isolation element in a half section.

FIG. 3 is a sectional view showing an enlarged main part of the seismic isolation element.

FIG. 4 is a sectional view showing an enlarged main part of the rotary body.

FIG. 5 is a perspective view showing a PTFE plate.

FIG. 6 is a sectional view showing a molding process of the PTFE plate.

FIG. 7 is a half sectional view showing a manufacturing process of the rotary body in the same manner.

FIG. 8 is a half sectional view showing a manufacturing process of the rotary body of the same.

FIG. 9 is an explanatory view of the operation of the seismic isolation element.

FIG. 10 is an explanatory view of the action of the seismic isolation element.

FIG. 11 is a cross-sectional view showing a manufacturing process of a receiving surface of upper and lower support members of a conventional seismic isolation element.

FIG. 12 is a cross-sectional view showing the manufacturing process of the receiving surfaces of the upper and lower support members.

FIG. 13 is a sectional view showing the manufacturing process of the receiving surfaces of the upper and lower support members.

FIG. 14 is a diagram showing a manufacturing process of the sliding member similarly.

FIG. 15 is a perspective view showing a manufacturing process of the sliding member in the same manner.

FIG. 16 is an enlarged perspective view of the manufacturing process of the sliding member.

[Explanation of symbols]

1: seismic isolation element, 2: upper supporting member, 2a: receiving surface, 3: lower supporting member, 3a: receiving surface, 4: rotating body, 4a, 4b: supporting surface, 4c: body, 4d: recess, 4e : Step, 10: base, 11: structure, 23: lubricant, 24: adhesive, 33:
PTFE plate, 34, 35: mold, 41: stainless plate,
H: horizontal force, V: vertical force.

Continued front page    (72) Inventor Masahiro Higuchi             1-1-5 Nisshin-cho, Fuchu-shi, Tokyo Sankyo Oy             Reless Industry Co., Ltd. F term (reference) 2D059 AA38 GG02 GG05                 3J048 AA07 BG01 DA01 EA38

Claims (3)

[Claims] 1. A receiving surface (2a) having a concave spherical surface of an upper supporting member (2) and a receiving surface (3a) having a concave spherical surface of a lower supporting member (3) are arranged to face each other, and The support surface (4a, 4b) has a convex spherical surface, and the flat rotating body (4) is interposed between both receiving surfaces (2a, 3a) to rotate the rotating body (4). However, in the structure supporting device in which the upper support member (2) and the lower support member (3) are moved relative to each other, one of the support surface (4a, 4b) and the receiving surface (2a, 3a) is A single recess (4d) having a shape forming a part of a hollow sphere is formed on the entire surface of the sliding surface, and the lubricant (23) is attached to the recess (4d) in an adhesive state. It is fixedly provided by (24),
A support device for a structure, which is in surface contact with the other of the support surface (4a, 4b) and the receiving surface (2a, 3a) with a predetermined friction coefficient. 2. The receiving surface (2a) having a concave spherical surface of the upper supporting member (2) and the receiving surface (3a) having a concave spherical surface of the lower supporting member (3) are vertically arranged so as to face each other. The support surface (4a, 4b) has a convex spherical surface, and the flat rotating body (4) is interposed between both receiving surfaces (2a, 3a) to rotate the rotating body (4). However, in the structure supporting device in which the upper support member (2) and the lower support member (3) are moved relative to each other, one of the support surface (4a, 4b) and the receiving surface (2a, 3a) is A recess (4d) having a shape forming a part of a hollow sphere is formed on the sliding surface, and
A lubricant (23) is fixedly provided by an adhesive (24) in a state of being fitted in the recess (4d), and is provided on the support surface (4a, 4b) and the receiving surface (2a, 3a). While making surface contact with the other at a predetermined coefficient of friction, the lubricant (23)
A support device for a structure, characterized in that the PTFE plate (33) is used as a material and is molded into a shape forming a part of a hollow sphere using a mold (34, 35). 3. The other sliding surface of the supporting surface (4a, 4b) or the receiving surface (2a, 3a) is formed by welding a stainless steel plate (41), and the lubricant (23) is formed. ,
The structure support device according to claim 1 or 2, which is in sliding contact with the stainless plate (41).