JP2005207460A - Rigid slide bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rigid slide bearing device capable of constructing its slide plate in a small size, narrowing the installation space, and eliminating necessity for using together a laminate rubber as bearing by furnishing a restoring force to restore the upper structure to the original position after deformation. <P>SOLUTION: The rigid slide bearing device includes an upper slide plate 5 fixed to the undersurface of the upper structure A, a lower slide plate 7 fixed to the oversurface of a lower structure B, and a plurality of slidable material layers 8 having a low friction coefficient and intermediate slide plates 9 made of metal which are laminated alternately, wherein the peripheries of the upper slide plate 5, intermediate slide plates 9, and the lower slide plate 7 are covered with a cylindrical member 10 of insulating rubber, and the inside surface of the rubber cylinder 10 is adhered by vulcanization to the peripheral edges of the upper slide plate 5, the intermediate slide plates 9, and the lower slide plate 7, in such an arrangement that gaps 11 are formed between the inside surface of the rubber cylinder 10 and the peripheral edges of the slidable material layers 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rigid sliding support device used for seismic isolation of buildings and bridges.

  As a conventional rigid sliding bearing device, for example, there is one as shown in FIG. 6 (see, for example, Patent Document 1). In the rigid sliding support device shown in FIG. 6, a pot rod 20 is fixed to the lower surface side of an upper structure A such as a building or a bridge, and a vertical deformation rubber sheet 22 is interposed in a recess 21 of the pot rod 20. The upper sliding plate 23 made of metal is fitted and held. On the other hand, the lower sliding plate 24 made of metal is fixed to the upper surface side of the lower structure B such as a building foundation or a pier, and directly attached to the upper surface of the lower sliding plate 24. A rigid sliding bearing formed by relatively sliding a sliding material layer 25 such as a fixed stainless steel plate and a sliding material layer 26 such as a fluororesin plate having a small friction coefficient directly attached and fixed to the lower surface of the upper sliding plate 23 in the horizontal direction. Device.

  In this rigid sliding bearing device, the vertical deformation rubber sheet 22 in the pot rod 20 absorbs vertical vibrations of the upper structure A and is moved up and down so that the vibration at the time of earthquake is not transmitted to the upper structure A as much as possible. The frictional resistance between the sliding material layers 25 and 26 is reduced as much as possible, but it does not have the restoring force to return the upper structure A to its original position after deformation at the time of an earthquake. It is established as a seismic isolation system.

JP 2002-70943 (paragraph number [0002], FIG. 4)

  However, in the rigid sliding bearing device, since it is necessary to add a laminated rubber bearing, it is disadvantageous in terms of workability and installation cost, and the lower sliding plate 24 requires a large area for horizontal deformation, There is a problem that a considerably large installation space is required, and the installation cost is high in this respect as well.

  Accordingly, an object of the present invention is to solve such a problem, and it is possible to reduce the size of the sliding plate and the installation space, and to restore the upper structure to the original position after deformation. It is an object of the present invention to provide a rigid sliding bearing device that does not require the combined use of laminated rubber bearings by giving force.

In order to achieve the above object, the rigid sliding bearing device of the present invention is characterized in that it is configured as follows.
A metal upper sliding plate is fitted and held in a recess provided on the lower surface of the pot cage fixed to the lower surface side of the upper structure body via a vertical deformation rubber, while being fixed to the upper surface side of the lower structure body. Secure the metal bottom slide on the top of the mounting flange. Between the upper sliding plate and the lower sliding plate, a plurality of low friction coefficient sliding material layers and metal intermediate sliding plates are alternately stacked. The slip material layer interposed between the upper slide plate and the uppermost intermediate slide plate is integrally joined to either the upper slide plate or the uppermost intermediate slide plate, and the other Is relatively slidable in the horizontal direction. The slip material layer interposed between the intermediate slip plates is integrally joined to one intermediate slide plate, and is relatively slidable in the horizontal direction with respect to the other intermediate slide plate. The slip material layer interposed between the lower slide plate and the lowermost intermediate slide plate is integrally joined to either the lower slide plate or the lowermost intermediate slide plate, and the other Is relatively slidable in the horizontal direction. The outer periphery of the upper sliding plate, the intermediate sliding plate, and the lower sliding plate is covered with a coated rubber cylindrical body, and the inner surface of the coated rubber cylindrical body is the outer peripheral edge of the upper sliding plate, the outer peripheral edge of the intermediate sliding plate, Further, the outer peripheral edge of the lower sliding plate is vulcanized and bonded to each other, and the inner surface of the coated rubber cylindrical body and the outer peripheral edge of each sliding material layer are not bonded and a gap is formed therebetween.

  As one preferred aspect, the rigid sliding support device according to the present invention is provided with a groove on the outer periphery protruding from the concave portion of the upper sliding plate, and the inner peripheral edge of the inner flange integrally joined to the lower surface of the pot rod is fitted into the groove. Can be combined.

According to the rigid sliding support device having the above-described configuration, the vertical vibration of the upper structure can be absorbed by the vertical deformation rubber in the recess of the pot rod.
Between the upper and lower sliding plates, a low friction coefficient sliding material layer and a metal intermediate sliding plate are alternately stacked, and the inner surface of the coated rubber cylinder is the outer peripheral edge of the upper sliding plate and the intermediate sliding plate. The outer peripheral edge and the outer peripheral edge of the lower sliding plate are vulcanized and bonded, and a gap is formed between the inner surface of the coated rubber cylinder and the outer peripheral edge of each sliding material layer. Smooth slip occurs between the intermediate slide plate and the uppermost intermediate slide plate, between the intermediate slide plates, and between the lower slide plate and the lowermost intermediate slide plate via the low friction coefficient slip material layer. It is possible to suppress the earthquake vibration from being transmitted to the superstructure as much as possible.

  The amount of horizontal deformation can be freely set by adjusting the increase or decrease in the number of intermediate slide plates and slide material layers stacked alternately between the upper slide plate and the lower slide plate and the size adjustment. Since the amount of horizontal deformation can be set by adjusting the number of intermediate slip plates and slip material layers, the lower slide plate and intermediate slide plate can be downsized without requiring a large area like the lower slide plate of the conventional rigid slide support device. And the installation area can be reduced.

  The outer periphery of the upper sliding plate, intermediate sliding plate, and lower sliding plate is covered with a coated rubber cylinder, and the inner surface of this coated rubber cylindrical body is the outer peripheral edge of the upper sliding plate, the outer peripheral edge of the intermediate sliding plate, and the lower sliding plate. Since the vulcanized adhesives are respectively attached to the outer peripheral edges of the slab, the coated rubber cylindrical body works to restore the upper structure to its original position after deformation during an earthquake. The restoring force can be adjusted by adjusting the hardness of the coated rubber cylinder. Therefore, it is not necessary to use a laminated rubber bearing as in the conventional rigid sliding bearing device, which is advantageous in terms of workability and installation cost. In addition, the coated rubber cylindrical body can also provide a rust preventive effect for metal upper and lower sliding plates and intermediate sliding plates.

  A preferred embodiment of the present invention will be described with reference to the drawings. 1 is a longitudinal sectional view of a rigid sliding bearing device according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the rigid sliding bearing device of FIG. 1, and FIG. 3 is a perspective view of the rigid sliding bearing device of FIG. FIG. 4 is an exploded sectional view of the upper slide plate, the intermediate slide plate, and the lower slide plate of the rigid slide support device of FIG. 1 before vulcanization molding, and FIG. 5 is another embodiment. It is a longitudinal cross-sectional view of the rigid sliding support apparatus which shows.

  In FIG. 1, the rigid sliding support device of the present invention has a pot rod 2 fixed to the lower surface side of the upper structure A with a bolt or the like, and a recess 3 provided on the lower surface of the pot rod 2 has an upper structure A of the upper structure A. A metal upper sliding plate 5 is fitted and held via a vertical deformation rubber 4 to cope with vertical deformation and rotation. On the other hand, a mounting flange 6 is fixed to the upper surface side of the lower structure B with a bolt or the like, and a metal lower sliding plate 7 is fixed to the upper surface of the mounting flange 6 with a bolt or the like.

  Between the upper sliding plate 5 and the lower sliding plate 7, a sliding material layer 8 with a low friction coefficient made of a fluororesin such as PTFE (polytetrafluoroethylene), and stainless steel (SUS304) or stainless steel coated with PTFE A plurality of intermediate slip plates 9 made of metal or the like are alternately stacked. The friction coefficient can be freely set by the types of materials of the upper and lower sliding plates 5 and 7 and the intermediate sliding plate 9 and the material of the sliding material layer 8.

The sliding material layer 8 interposed between the upper sliding plate 5 and the uppermost intermediate sliding plate 9 is joined and integrated with either the upper sliding plate 5 or the uppermost intermediate sliding plate 9 by coating or the like. The other side is slidable in the horizontal direction.
The slip material layer 8 interposed between the intermediate slip plates 9 and 9 is joined and integrated with one intermediate slip plate 9 and is relatively slidable in the horizontal direction with respect to the other intermediate slip plate 9. .
The slip material layer 8 interposed between the lower slide plate 7 and the lowermost intermediate slide plate 9 is joined and integrated with either the lower slide plate 7 or the lowermost intermediate slide plate 9, with respect to the other. It is possible to slide relative to the horizontal direction.

  In order to give the rigid sliding support device a restoring force, the outer peripheries of the upper sliding plate 5, the intermediate sliding plate 9, and the lower sliding plate 7 are covered with a coated rubber cylindrical body 10 having a predetermined hardness and vulcanized and integrally molded. The inner surface of the covered rubber cylindrical body 10 is vulcanized and bonded to the outer peripheral edge 5a of the upper sliding plate 5, the outer peripheral edge 9a of the intermediate sliding plate 9, and the outer peripheral edge 7a of the lower sliding plate 7, respectively. A gap 11 is formed between the inner surface and the outer peripheral edge of each sliding material layer 8 in an unbonded state.

  The rigid sliding support device having the above configuration is assembled, for example, in the following manner. First, as shown in FIG. 4, the upper sliding plate 5, a plurality of intermediate sliding plates 9 coated on the upper surface with a low friction coefficient sliding material layer 8 such as PTFE or the like, and a sliding material layer 8 also made of a fluorine resin or the like. As shown in FIG. 3, the lower sliding plate 7 coated on the upper surface is stacked. Next, as shown in FIG. 3, the outer periphery of the upper slide plate 5, the intermediate slide plate 9, and the lower slide plate 7 is covered with a covered rubber cylindrical body 10 and vulcanized and integrally molded. At that time, the inner surface of the coated rubber cylinder 10 is vulcanized and bonded to the outer peripheral edge 5a of the upper sliding plate 5, the outer peripheral edge 9a of the intermediate sliding plate 9, and the outer peripheral edge 7a of the lower sliding plate 7, respectively. A gap 11 is formed between the inner surface of the body 10 and the outer peripheral edge of each sliding material layer 8. Next, the integrally vulcanized molded product thus made is combined with the pot basket 2 shown in FIG. In this case, the upper sliding plate 5 is fitted and held in the recess 3 provided on the lower surface of the pot rod 2 via the vertical deformation rubber 4, and the lower sliding plate 7 is integrated with the upper surface of the mounting flange 6 with bolts or the like. Fixed to the joint.

  Thus, as shown in FIG. 1, the pot rod 2 is integrally coupled and fixed to the lower surface side of the upper structure A with a bolt or the like, and the mounting flange 6 is integrally coupled and fixed to the upper surface side of the lower structure B with a bolt or the like. To do.

  In this way, the rigid sliding support device installed between the upper structure A and the lower structure B is located between the upper sliding plate 5 and the uppermost intermediate sliding plate 9 as shown in FIG. Smooth slip occurs between the intermediate slide plates 9, 9 and between the lower slide plate 7 and the lowermost intermediate slide plate 9 via the slip material layer 8 having a low friction coefficient, and deforms in the horizontal direction. Thus, it is possible to suppress the vibration of the earthquake from being transmitted to the upper structure A. After the deformation of FIG. 2, the upper structure A is returned to the original position shown in FIG. 1 by the restoring force of the coated rubber tubular body 10. Therefore, since it is not necessary to provide a laminated rubber bearing separately from this rigid sliding bearing device, the construction is simplified and the installation cost can be reduced.

  Since the horizontal deformation amount X of the rigid sliding support device can be freely set by adjusting the number of stacked intermediate sliding plates 9 and sliding material layers 8, the lower sliding plate 7 is the same as the conventional lower sliding plate 24 shown in FIG. For example, it is not necessary to form a large size, and the size can be reduced, and the installation area of the rigid sliding support device can be reduced.

FIG. 5 shows another embodiment. In this embodiment, a groove 12 is provided on the outer periphery of the portion of the upper slide plate 5 that protrudes from the recess 3, and the inner peripheral edge 13 a of the internal flange 13 that is integrally bonded to the lower surface of the pot rod 2 with a countersunk screw, bolt 14, etc. Is different from the rigid sliding support device of the above embodiment, and other configurations are completely the same as the rigid sliding support device of the above embodiment.
If the inner peripheral edge 13a of the inner flange 13 is fitted in the groove 12 of the upper sliding plate 5 in this way, the upper sliding plate 5 is pulled by the covered rubber tubular body 10 during horizontal deformation and is released from the recess 3. It can be surely prevented.

It is a longitudinal cross-sectional view of the rigid sliding support apparatus which shows one Example of this invention. It is a longitudinal cross-sectional view of the state which the rigid sliding support apparatus of FIG. 1 deform | transformed. It is a longitudinal cross-sectional view which shows the rigid sliding support apparatus of FIG. 1 in an exploded state. It is a decomposition | disassembly state figure of the state before the vulcanization shaping | molding of the upper slide board of the rigid slide support apparatus of FIG. 1, an intermediate | middle slide board, and a lower slide board. It is a longitudinal cross-sectional view of the rigid sliding support apparatus which shows another Example. It is a longitudinal cross-sectional view of the rigid sliding support apparatus of a prior art example.

Explanation of symbols

2 Pot cage 3 Recess 4 Rubber for vertical deformation 5 Upper sliding plate 6 Mounting flange 7 Lower sliding plate 8 Slip material layer 9 Intermediate slip plate 10 Covered rubber cylindrical body 11 Gap 12 Groove 13 Internal flange 13a Inner peripheral edge A Upper structure B Substructure

Claims (2)

A metal upper sliding plate is fitted and held via a vertical deformation rubber in a recess provided on the lower surface of the pot cage fixed to the lower surface side of the upper structure.
A metal lower sliding plate is fixed to the upper surface of the mounting flange fixed to the upper surface side of the lower structure.
Between the upper sliding plate and the lower sliding plate, a plurality of layers of a low friction coefficient sliding material layer and a metal intermediate sliding plate are alternately stacked,
The slip material layer interposed between the upper slide plate and the uppermost intermediate slide plate is integrally joined to either the upper slide plate or the uppermost intermediate slide plate, and the other Is relatively slidable in the horizontal direction,
The slip material layer interposed between the intermediate slip plates is integrally joined to one intermediate slip plate, and is relatively slidable in the horizontal direction with respect to the other intermediate slip plate.
The slip material layer interposed between the lower slide plate and the lowermost intermediate slide plate is joined and integrated with either the lower slide plate or the lowermost intermediate slide plate, and the other Is relatively slidable in the horizontal direction,
The outer periphery of the upper sliding plate, the intermediate sliding plate, and the lower sliding plate is covered with a coated rubber cylindrical body, and the inner surface of the coated rubber cylindrical body is the outer peripheral edge of the upper sliding plate, the outer peripheral edge of the intermediate sliding plate, And vulcanized and bonded to the outer peripheral edge of the lower sliding plate, respectively, and the inner surface of the coated rubber cylindrical body and the outer peripheral edge of each sliding material layer are non-adhered and a gap is formed between them. A rigid sliding support device. The rigid sliding bearing according to claim 1, wherein a groove is provided on an outer periphery of a portion protruding from the concave portion of the upper sliding plate, and an inner peripheral edge of an internal flange integrally joined to the lower surface of the pot rod is fitted into the groove. apparatus.

Images