JPH0352807Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a movable support used for bridges, elevated roads, etc.

<Prior art> Figure 1 shows a movable bearing conventionally used in bridges, etc.

In the figure, the upper shoe 1 is attached to the upper structure G such as a bridge girder.
is fixed, and the upper shoe 1 has notches 2, 2 formed at both ends in the direction perpendicular to the bridge axis.

A lower shoe 3 is fixed to a lower structure B such as a pier, and the upper surface of the lower shoe 3 has a concave spherical surface portion 4, an annular groove 5 surrounding the opening of the concave spherical surface portion 4, and a concave spherical surface portion 4. Protrusions 6, 6 are formed facing each other at the ends in the direction perpendicular to the bridge axis.

The concave spherical part 4 of the lower shoe 3 has a convex spherical part 7 on the lower surface.
A bearing plate 9 having a flat surface 8 on its upper surface is disposed in fitting and sliding contact with the convex spherical surface 7, and the upper shoe 1 has its lower surface slidingly in contact with the flat surface 8 of the bearing plate 9. and cut out parts 2, 2 at both ends.
are engaged with the protrusions 6, 6 of the lower shoe 3 to remove the lower shoe 3.
placed above.

A rubber seal ring 10 is fitted and fixed in the annular groove 5 of the lower shoe 3 with one end protruding from the groove 5, and the protruding end of the seal ring 10 is attached to the lower surface of the upper shoe 1. is in contact with.

In the movable bearing constructed as described above, expansion and contraction of the upper structure G is allowed by the sliding contact between the lower surface of the upper shoe 1 and the flat surface 8 of the bearing plate 9, and the inclination of the upper structure G is controlled by the convex spherical surface of the bearing plate 9. This is allowed by the sliding contact between the portion 7 and the concave spherical surface portion 4 of the lower shoe 3.

<Problems to be solved by the invention> By the way, in a bearing that allows the displacement of the superstructure G by sliding, the intrusion of rainwater, dust, etc. into the sliding surface may hinder the smooth sliding of various parts.
It is necessary to prevent this displacement as much as possible since it interferes with smooth tolerance of the displacement.

In the conventional movable bearing described above, the rubber seal ring 10 surrounding the bearing plate 9 plays a role in preventing dust and the like from entering the sliding surface.

However, the sealing effect between the upper and lower shoes 1 and 3 by the seal ring 10 is solely due to the compressive restoring force of the seal ring 10, so the seal ring 10 is subjected to compressive force for a long period of time. There is a problem in that creep occurs in the seal ring 10, resulting in a decrease in restoring force and a decrease in sealing effect. In addition, increasing the contact force of the seal ring 10 to the lower surface of the upper shoe 1 in order to improve the sealing effect increases the frictional force between the upper shoe 1 and the seal ring 10 when the upper shoe moves, resulting in a seal. There is a problem in that a shearing force is generated in the ring 10, causing torsional deformation due to the shearing force and creating a gap between the lower surface of the upper shoe 1 and the seal ring 10.

In view of the problems of the prior art described above, the present invention aims to provide a movable bearing with a sealed structure that can prevent dust and the like from entering the sliding surface for a long period of time.

<Means for solving the problems> In order to achieve the above-mentioned purpose, the present invention adopts the following technical means (configuration).

In other words, the upper shoe is fixed to the upper structure such as a bridge girder, and the lower shoe is fixed to the lower structure such as a bridge pier.
In a movable support consisting of a movable member disposed between the upper and lower shoes and allowing the upper structure to expand, contract and tilt, the upper surface of the lower shoe has a recess and an annular groove surrounding the opening of the recess. A movable member is disposed in the lower shoe recess with its upper end protruding from the opening of the recess, and the movable member protruding from the recess has a sliding surface flush with the upper surface of the movable member. A member is fixed between the lower surface of the sliding member and the upper surface of the lower shoe surrounding the movable member, one end of which is fitted and fixed into the annular groove of the lower shoe, and the other end of which is fixed to the lower surface of the sliding member. This movable support is characterized in that a rubber seal ring fixed to the movable member and a sliding member are provided with an upper shoe on the upper surface thereof.

In the above configuration, the movable member has a flat portion on one surface and a convex spherical surface portion on the other surface, and the convex spherical surface portion is disposed in fitting and sliding contact with the recessed portion of the lower shoe. In addition, the movable member includes a rubber elastic body hermetically filled in the recess of the lower shoe, an intermediate plate disposed on the rubber elastic body with its upper end protruding from the lower shoe recess, and the movable member is fitted and fixed to the upper surface of the intermediate plate. It consists of a sliding material made of aluminum.

The sliding member fixed to the peripheral edge of the movable member is
A steel plate or a fiber-reinforced synthetic resin plate coated with a self-lubricating sliding material such as a synthetic resin such as polytetrafluoroethylene resin or a solid lubricant such as molybdenum disulfide on one side is used. The sliding member is fixed to the movable member by fitting or by using fixing means such as bolts.

<Embodiments> Hereinafter, the present invention will be explained in detail with reference to FIGS. 2 and 3 of the accompanying drawings showing embodiments thereof.

In the figure, reference numeral 11 denotes an upper shoe fixed to a superstructure G such as a bridge girder, and notch recesses 12 are formed at both ends of the upper shoe 11 in a direction perpendicular to the bridge axis, facing each other. 13 is a lower shoe fixed to a lower structure B such as a pier, and the upper surface of the lower shoe 13 has a concave spherical surface portion 14, an annular groove 15 surrounding the opening of the concave spherical surface portion 14, and a concave spherical surface portion 14. Projections 16, 16 projecting upward are formed at the ends of the bridge in the direction perpendicular to the bridge axis.

Reference numeral 17 denotes a movable member, and the movable member 17 has a flat portion 18 on its upper surface, a cylindrical protrusion 19 at the center of the flat portion 18, and a convex spherical portion 20 on the other surface.

The movable member 17 connects the convex spherical surface portion 20 to the lower shoe 13.
It is disposed in fitting and sliding contact with the concave spherical surface portion 14 of.

Reference numeral 21 denotes a sliding member having a sliding material 22 attached to its upper surface, and a circular hole 23 is formed in the sliding member 21. The sliding member 21 is fixed on the movable member 17 by fitting the circular hole 23 into the cylindrical protrusion 19 of the movable member 17 and making the upper surface of the sliding member 22 flush with the upper surface of the protrusion 19. has been done.

The upper shoe 11 has a notched recess 1 in the direction perpendicular to the bridge axis.
2 and 12 are engaged with the protrusions 16 and 16 of the lower shoe 13, and the movable member 17 is disposed with the lower surface fitting and sliding into contact with the concave spherical surface portion 14 of the lower shoe 13;
It is arranged on the upper sliding surface of the sliding member 21 fixed to.

24 is a rubber seal ring; one end of the seal ring 24 is fitted and fixed into the annular groove 15 of the lower shoe 13, and the other end is fixed to the lower surface of the sliding member 21 fixed to the movable member 17. ing.

FIG. 4 shows another embodiment, which differs from the above embodiment in the method of fixing the sliding member 21 to the movable member 17.

That is, the sliding member 21 includes a cylindrical portion 25 and a wide flange 26 integrally formed on the peripheral edge of one end of the cylindrical portion 25, and the sliding member 2 is provided on the upper surface of the wide flange 26.
2 is attached.

The sliding member 21 has the cylindrical portion 25 fitted to the outer peripheral edge of the movable member 17, and the upper surface of the sliding member 22 attached to the upper surface of the wide collar portion 26 is inserted into the movable member 1.
The cylindrical portion 25 is fixed to the movable member 17 by bolts 27 so as to be flush with the flat portion 18 of the cylindrical portion 7 .

FIG. 5 shows yet another embodiment.

In this embodiment, the recess formed in the upper surface of the lower shoe 13 is a cylindrical recess 14a, and the movable member 17 has a rubber elastic body 18 hermetically filled in the cylindrical recess 14a and an upper end on the rubber elastic body 28. The recess 14a
It is composed of an intermediate plate 29 that is arranged to protrude further and a sliding member 30 that is fitted and fixed to the upper surface of the intermediate plate 29.

In the movable member 17, the intermediate plate 29 tilts due to the elastic deformation of the rubber elastic body 28, allowing the upper structure G to tilt, and the upper surface of the sliding member 30 and the lower surface of the upper shoe 11 slidingly contact each other to allow the upper structure G to expand and contract. Allow.

The sliding member 21 includes the cylindrical portion 25 and a wide flange 26 integrally formed on the peripheral edge of one end of the cylindrical portion 25, and has a sliding material 22 coated on the upper surface of the wide flange 26. The upper surface of the sliding material 22 fitted on the outer peripheral edge of the intermediate plate 29 of the movable member 17 and attached to the upper surface of the wide flange 26 is connected to the upper surface of the sliding material 30 fitted and fixed to the upper surface of the intermediate plate 29. The bolt 27 is flush with the cylindrical portion 25.
It is fixed to the movable member 17 by.

Also in the embodiment shown in FIGS. 4 and 5, the rubber seal ring 24 has one end fitted into and fixed to the annular groove 15 of the lower shoe 13, and the other end of the rubber seal ring 24 to a sliding member fixed to the movable member 17. It is fixed to the bottom surface of 21.

<Effects of the invention> The present invention having the above-described configuration has the following unique effects.

One end of the rubber seal ring is fitted and fixed into the annular groove of the lower shoe, and the other end is fixed to the lower surface of the sliding member fixed to the movable member, so the rubber seal ring is subject to creep deformation due to compressive force. does not occur. Even if the upper shoe, which is fixed to the upper structure to allow expansion and contraction of the upper structure, slides, no shearing force is applied to the rubber seal ring, and the seal ring is not torsionally deformed due to the shearing force. does not occur. Due to the above-mentioned effects, the sealing effect between the upper and lower shoes by the rubber seal ring is maintained over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical cross-sectional view showing the prior art, FIG. 2 is a vertical cross-sectional view showing an embodiment of the present invention, and FIG.
FIG. 2 is an enlarged view of the main part, and FIGS. 4 and 5 are enlarged views of the main part showing other embodiments of the present invention. 11... Upper shoe, 13... Lower shoe, 14... Concave spherical surface part, 14a... Cylindrical recessed part, 15... Annular groove,
17...Movable member, 21...Sliding member, 24...
Rubber seal ring.

Claims (1)

[Scope of claim for utility model registration] (1) An upper shoe fixed to a superstructure such as a bridge girder, a lower shoe fixed to a lower structure such as a bridge pier,
In a movable support consisting of a movable member disposed between the lower shoe and allowing the upper structure to expand, contract and tilt, the upper surface of the lower shoe has a recess and an annular groove surrounding the opening of the recess. A movable member is disposed in the lower shoe recess with its upper end protruding from the opening of the recess, and a sliding member whose sliding surface is flush with the upper surface of the movable member is fixed to the movable member protruding from the recess. Between the lower surface of the sliding member and the upper surface of the lower shoe, one end is fitted and fixed to the annular groove of the lower shoe surrounding the movable member, and the other end is fixed to the lower surface of the sliding member. 1. A movable support, characterized in that a rubber seal ring is disposed thereon, and an upper shoe is disposed on the upper surface of the movable member and the sliding member. (2) The movable member has a flat surface on one surface and a convex spherical surface on the other surface, and is disposed on the lower shoe by fitting the convex spherical surface into the recess of the lower shoe. A movable support according to claim 1 of the utility model registration claim. (3) The movable member includes a rubber elastic body hermetically filled in the recess of the lower shoe, an intermediate plate disposed on the rubber elastic body with its upper end protruding from the lower shoe recess, and an upper surface of the intermediate plate. The movable support according to claim 1 of the utility model registration claim, characterized in that the sliding member is fitted and fixed.