JP2002220813A - Bearing device equipped with dust preventive cylindrical body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a bearing effect in a stable state over a long period by preventing the penetration of dust between curved faces playing an important part for bearing a superstructure, in a movement such as expansion and contraction thereof, while following the movement. SOLUTION: This bearing device comprises a bearing pressure member 4 arranged on the lower part of an upper support member 3 fixed to the superstructure 1 so as to slidably bean the relative lateral movement of the upper support member 3 and a lower support member 5 for bearing the bearing pressure member 4. A dust preventive cylindrical body 10 made of an elastic material is arranged extending over the circumferential surface 8 of the bearing pressure member 4 and the circumferential surface 9 of the lower support member 5 so as to cover the mutual fitting part of the curved face 6 of the bearing pressure member 4 and the curved face 7 of the lower support member 5. The upper part of the cylindrical body 10 is fixed to the bearing pressure member 4, and the lower part thereof is fixed to the lower support member 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing device having a dustproof tubular body used for bridges, elevated roads and other various structures. More specifically, the present invention relates to a bearing device provided with a dustproof tubular body disposed between a bridge girder or other upper structure and a pier or other lower structure.

[0002]

2. Description of the Related Art As a conventional bearing device of this type, for example, a bridge bearing device as shown in FIG. 5 is known. In such a bearing device, between the upper shoe (upper support member) 3 and the lower shoe (lower support member) 5, a steel or rubber material having a curved upper surface 6 having a flat upper surface and a substantially lower hemispherical surface. A supporting member 4 made of an elastic body or the like is attached, and an upper structure 1 such as a bridge girder is mounted.
Is tilted (rotated) with respect to the center axis of the support member 4 due to bending or the like, the tilt is mainly caused by the curved surface 6 of the support member 4.
And a lower shoe (lower support member) 5 that contacts the curved surface 8 of the lower shoe (rotational sliding).

In the above-described conventional bearing device, dirt such as sand penetrates between the two slidable curved surfaces, damaging the two curved surfaces and hindering the sliding action. Something like that also occurs. Therefore, a cylindrical rubber dust-proof rubber ring 11 for preventing dust from entering between the curved surfaces.
Is provided on the lower surface of the upper support member 3. Since the upper support member 3 is configured such that its sliding surface 12 can slide with respect to the sliding surface 13 with the supporting member 4, the upper support member 3 When 3 is relatively large and displaces in the horizontal direction, the dust-proof rubber ring 11 gets caught in the slide surface 12, the dust-proof rubber ring 6 does not exhibit the dust-proof action, and there is a problem that dust enters between the curved surfaces. .

[0004]

SUMMARY OF THE INVENTION
Eliminates intrusion of dirt into the supporting member mounted between the upper and lower support members and the curved surface (hemispherical receiving surface) of the lower support member, and prevents tilting (rotation or rotation) due to bending of the upper structure. The present invention has been proposed for the purpose of making it possible to exhibit the function of supporting while following in a stable state for a long period of time.

[0005]

In order to achieve the above object, according to the present invention, a bearing device having a dustproof tubular body according to the present invention comprises a bridge girder or other upper structure 1 and a bridge pier or other lower structure. A supporting pressure disposed between the object 2 and a lower portion of the upper supporting member 3 fixed to the upper structure 1 so as to slidably support the relative lateral movement of the upper supporting member 3. In a bearing device including a member 4 and a lower supporting member 5 for supporting the supporting member 4, a lower surface of the supporting member 4 is formed into a curved surface 6 having a downwardly convex or concave spherical surface. ,
The upper surface of the lower support member 5 is a curved surface 7 having a concave or upwardly convex spherical shape, and the outer peripheral surface 8 of the supporting member 4 and the lower portion are covered so as to cover the fitting portion between the two curved surfaces from the outside. Support member 5
Of the dust-proof cylindrical body 10 made of an elastic material
The upper part of the dustproof cylindrical body 10 is fixed to the supporting member 4, and the lower part of the dustproof cylindrical body 10 is fixed to the lower support member 5. Claim 2
According to the present invention, in the bearing device according to the first aspect, the dust-proof cylindrical body made of the elastic material includes the supporting member 4 and the lower supporting member 5.
To the dustproof tubular body 10 made of a baked or elastic material.
Are fixed at the same time in the step of molding and solidifying. Further, according to a third aspect of the present invention, in the bearing device according to the first or second aspect, a part or the entirety of an inner peripheral surface of the dust-proof cylindrical body 10 is in close contact with the supporting member 4 and the lower supporting member 5. It is characterized by being fixed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments shown in the drawings. 1 to 3 show an embodiment of the present invention, in which reference numeral 1 denotes a bridge girder and other upper structures, 2 denotes a pier and other lower structures,
Is disposed between the upper structure 1 and the lower structure 2, and is attached to the upper surface of the lower structure 2 with bolts 40, such as anchor bolts, and nuts, and a mounting flange portion 2 of the lower support member 5 described later.
2 shows a bearing device fixed via 2 respectively.
Usually, a plurality of the bearing devices 30 are installed at one place at a required interval, but one of them is shown in FIG.

As shown in FIGS. 1 and 2, the upper support member 3 directly or indirectly fixed to the upper structure 1 is formed, for example, in a rectangular or disk shape, and has a lower surface in the bridge axis direction. Alternatively, a flat sliding surface slidable in a direction perpendicular to the bridge axis is provided, and a steel bearing member 4 having a flat sliding support upper surface is disposed on a lower surface of the upper support member 3.
The lower surface of the supporting member 4 is a curved surface 6 having a downwardly convex spherical shape or a curved surface 6 having a downwardly concave spherical shape (see the second embodiment in FIG. 4). The upper support member 3 may be made of a steel material, but may be made of another material as long as it is tough and hard. Further, the bearing member 4 may be made of a steel material or an elastic material.

The lower support member 5 directly or indirectly disposed on the lower structure 2 is, for example, a mounting member formed integrally or separately on a lower portion of the disk body and having a rectangular plane. Formed into a shape having a flange portion 22 for
The upper surface of the lower support member 5 may be a curved surface 7 having a concave spherical shape corresponding to the convex curved surface 6 below the support member 4, or the upper surface of the lower support member 5 may be an upper support member. 3 is a curved surface 7 having an upwardly convex spherical shape corresponding to the concave curved surface 6 below (see the second embodiment in FIG. 4). Reference numeral 23 denotes a bolt insertion hole provided in the flange portion 22. The lower support member 5 can be made of a steel material similarly to the upper support member 3, but may be made of another material as long as the material is tough and hard.

The cylindrical outer peripheral surface 8 of the support member 4 and the cylindrical outer peripheral surface 9 of the lower support member 5 preferably have substantially the same circular outer surface shape. Over the cylindrical outer peripheral surface 8 of the supporting member 4 and the cylindrical outer peripheral surface 9 of the lower support member 5, the curved surfaces 6, 7 serving as a load transmitting surface and a rotation bearing surface therebetween are formed from outside. A dustproof tubular body 10 made of an elastic material such as rubber is disposed so as to cover the outer peripheral surfaces 8 and 9, and the entire upper surface or the upper end of the inner peripheral surface of the dustproof tubular body 10 is covered. The peripheral surface is fixed to the outer peripheral surface of the supporting member 4 by baking or integral molding, and the entire lower surface of the inner peripheral surface of the dustproof tubular body 10 or the inner peripheral surface at the lower end thereof is cylindrical. It is fixed to the outer peripheral surface 9 by baking or integral molding.

It is preferable that the dust-proof cylindrical body 10 made of the elastic material has substantially the same thickness as a whole.
The overall length in the vertical direction does not have to be uniform.

The dust-proof cylindrical body 10 made of the elastic material is preferably fixed to the supporting member 4 and the lower supporting member 5 by integral molding at the same time as the step of molding and solidifying the rubber-like elastic material. For example, when the material of the dustproof cylindrical body 10 is a rubber material, the rubber material can be vulcanized and bonded to the steel supporting member 4 and the lower supporting member 5. The dust-proof cylindrical body 10 fixed by such a method is made of an elastic material by the rotation (rotation) of the support member 4 accompanying the bending of the upper structure 1 (rotation as viewed from the fulcrum on the bearing device side). Even when the dust-proof tubular body 10 is repeatedly subjected to the shearing or elastic deformation action, the dust-proof tubular body 10 is not easily peeled off and has excellent adhesion (adhesion). In order to further enhance the fixation of the dust-proof cylindrical body 10 made of an elastic material, the outer peripheral surfaces 8 and 9 of the supporting member 4 and the lower supporting member 5 may be formed in advance by knurling or the like to have a rough surface. it can.

However, the dust-proof cylindrical body 10 made of an elastic material is
Each of the outer peripheral surfaces 8,
9 and the vertical surfaces of both ends of the band-shaped plate are adhered to each other with an adhesive, and the entire inner peripheral surface or at least the upper and lower ends of the band-shaped plate are adhered to the respective outer peripheral surfaces. It can also be formed by bonding the surfaces 8 and 9 with an adhesive.

As shown in FIG. 1, between the upper support member 3 and the bearing member 4 fixed to the upper structure 1, the upper structure 1 is adapted to cope with the expansion and contraction of the upper structure 1 in the horizontal direction. May be provided with a horizontal sliding means 43. The horizontal sliding means 43 is composed of a sliding plate 41 made of stainless steel or the like fixed to the lower surface of the upper support member 3 fixed to the upper structure 1 and ethylene tetrafluoride fixed to the upper surface of the bearing member 4. The upper structure 1 is formed of a sliding surface 42 or a plate that is slidably contacted with the sliding plate 41 and the sliding surface 42. I try to escape.

In the bearing device according to the second embodiment shown in FIG. 4, the lower surface of the supporting member 4 is a curved surface 6 having a concave spherical shape, and the upper surface of the lower supporting member 5 is a convex spherical surface. Although the present embodiment is different from the first embodiment shown in FIG. 3 in that the curved surface 7 has the same shape, the other components are equivalent and have the same operation and effect.
The same reference numerals are given and the description is omitted.

When the present invention is carried out, the elastic bearing device may be arranged upside down so that the sliding surface is located on the lower structure 2 side.

In the bearing device of the present invention, when the upper structure 1 such as a bridge girder is tilted (rotated) and slid with respect to the center axis a of the device in the direction of arrow P in FIG. The main objective is to respond,
When the upper structure 1 is tilted, the upper support member 3 that is displaced in accordance with the tilt is displaced from the lower support member 5, but the displacement is released by the rotation between the curved surfaces 6 and 7 and the slide bearing surface 12. And thus the superstructure 1
Is not released, and dust such as dust does not enter between the curved surfaces 6 and 7.

When the present invention is carried out, the upper structure 1 is moved relative to the lower structure 2 in one or both directions of the bridge axis in the horizontal direction or the direction perpendicular to the bridge axis. In order to restrain the movement, a holding member is provided on one of the lower structure 2 and the upper structure 1, and a known device such as a steel plate engaging with the other is incorporated in the other, or provided separately and separately. You may. In this way, the bearing device of the present invention can be a fixed bearing or a sliding movable bearing.

In practicing the present invention, the dust-proof cylindrical body 10 made of an elastic material may be made of a synthetic resin made of an elastic material, and, as shown in FIG. 44 may be formed to cope with the elastic deformation of the intermediate portion.

[0019]

As described above, according to the bearing device of the present invention, the dust-proof cylindrical body made of an elastic material is simply formed of the supporting member and the lower supporting member (the upper supporting member when the supporting member is inverted). Just by fixing to the outer peripheral surface, intrusion of dirt such as sand into the curved surface portion between the supporting member and the lower support member is prevented, and the curved surfaces are not damaged by abrasion. It is possible to exhibit a stable and long-lasting action of supporting the structure while adapting to the tilting of the upper structure by utilizing the shear deformation or the elastic deformation of the upper structure.

Further, since the dust-proof tubular body made of an elastic material is not provided in the sliding portion as in the conventional case, the dust-proof tubular body is not caught on the slide surface as in the conventional case. Further, the structure is simple, the production cost can be reduced, and the present invention can be applied to an existing bearing device.

Since the curved surface fitting portion, that is, the hinge portion is protected by the dust-proof cylindrical body made of the elastic material, the rust-preventing effect of this portion can be exerted.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal side view showing a use mode of a first embodiment of a bearing device according to the present invention.

FIG. 2 is a plan view of the bearing device removed from FIG.

FIG. 3 is a longitudinal side view of the same.

FIG. 4 is a vertical sectional side view showing a second embodiment of the present invention.

FIG. 5 is a vertical sectional side view showing a conventional bearing device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 upper structure 2 lower structure 3 upper support member 4 support member 5 lower support member 6 curved surface 7 curved surface 8 outer peripheral surface (support member side) 9 outer peripheral surface (lower support member side) 10 dustproof tubular body DESCRIPTION OF SYMBOLS 11 Dust-proof rubber ring 12 Sliding surface 13 Slip surface 12 Mounting flange portion 13 Bolt insertion hole 22 Mounting flange portion 23 Bolt insertion hole 30 Bearing device 40 Bolt 41 Sliding plate 42 Sliding layer (slip surface) 43 Horizontal sliding means 44 Annular space

Claims (3)

[Claims] 1. An upper support member 3 which is disposed between a bridge girder or other upper structure 1 and a pier or other lower structure 2 and is fixed to the upper structure 1. In a bearing device provided with a support member 4 arranged to slidably support a lateral movement and a lower support member 5 for supporting the support member 4, a lower surface of the support member 4 is provided. A curved surface 6 having a downwardly convex or downwardly concave spherical surface, and an upper surface of the lower support member 5 being a concavely upwardly or upwardly convex spherical surface 7 is provided. A dust-proof cylindrical body 10 made of an elastic material is disposed over the outer peripheral surface 8 of the supporting member 4 and the outer peripheral surface 9 of the lower support member 5 so as to cover the joint from the outside. The upper part of the body 10 is fixed to the support member 4, and the lower part of the dustproof tubular body 10 is fixed to the lower support member 5. A bearing device provided with a dustproof tubular body, characterized in that: 2. The dust-proof tubular body 10 made of an elastic material is simultaneously fixed to the supporting member 4 and the lower support member 5 in a step of baking or molding and solidifying the dust-proof tubular body 10. A bearing device provided with the dustproof tubular body according to claim 1. 3. A part or entire inner peripheral surface of the dust-proof cylindrical body 10 is fixed to the supporting member 4 and the lower supporting member 5 in close contact with each other. A bearing device provided with the dustproof tubular body according to 2.