JP4377077B2 - Bearing device with dust-proof cylindrical body - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bearing device including a dust-proof cylindrical body used in bridges, elevated roads, and other various structures. More specifically, the present invention relates to a bearing device including a dust-proof cylindrical body disposed between a bridge girder or other upper structure and a pier or other lower structure.
[0002]
[Prior art]
As this type of conventional bearing device, for example, a bridge bearing device as shown in FIG. 5 is known. In such a support device, steel or rubber having a curved surface 6 between an upper rod (upper support member) 3 and a lower rod (lower support member) 5 having a flat upper surface and a substantially hemispherical lower surface. When the bearing member 4 made of a cylindrical elastic body is mounted and the upper structure 1 such as a bridge girder tilts (rotates) with respect to the central axis of the bearing member 4 due to bending or the like, the tilt is mainly caused by the bearing member 4. The curved surface 6 is supported by sliding (rotating sliding) between the curved surface 6 and the curved surface 8 of the lower collar (lower support member) 5 in contact therewith.
[0003]
In the conventional bearing device as described above, dust such as sand enters between the two curved surfaces which can be slid, and both the curved surfaces are damaged and the sliding action is hindered. 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, and the upper support member 3 has a sliding surface 12. Since it is configured to be slidable with respect to the sliding surface 13 with the bearing member 4, when the upper support member 3 is relatively large and displaced in the horizontal direction, the dust-proof rubber ring 11 is caught in the sliding surface 12, There is a problem that the dustproof rubber ring 6 does not exhibit a dustproof action and dust enters between the curved surfaces.
[0004]
[Problems to be solved by the invention]
The bearing device according to the present invention eliminates intrusion of debris in the support member mounted between the upper and lower support members and the curved surface (hemispherical receiving surface) portion of the lower support member, and tilts due to the deflection of the upper structure. It has been proposed for the purpose of being able to exhibit the effect of supporting while following (rotation or rotation) in a stable state over a long period of time.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the bearing device having the dust-proof cylindrical body according to claim 1 according to the present invention is disposed between a bridge girder and other upper structure 1 and a bridge pier and other lower structure 2. A supporting member 4 is disposed below 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, and the supporting member 4. And a lower support member 5 for supporting the lower support member 5. The lower surface of the support member 4 is a curved surface 6 having a spherical surface that is convex downward or concave downward, and the upper surface of the lower support member 5 is upward. A curved surface 7 having a concave or convex spherical surface, and an outer peripheral surface 8 of the bearing member 4 and an outer peripheral surface 9 of the lower support member 5 so as to cover the fitting portion between the two curved surfaces from the outside. The dust-proof cylindrical body 10 made of an elastic material is arranged, and the upper part of the dust-proof cylindrical body 10 is a bearing portion. 4 to be fixed, the lower portion of the dust-proof cylindrical body 10 is characterized in that it is fixed to the lower support member 5.
According to a second aspect of the present invention, in the bearing device of the first aspect, the elastic material-made dust-proof cylindrical body 10 is baked on the bearing member 4 and the lower support member 5 or a dust-proof tube made of an elastic material. The solid body 10 is fixed at the same time in the step of molding and solidifying.
Further, the invention according to claim 3 is the bearing device according to claim 1 or 2, wherein a part or the whole of the inner peripheral surface of the dust-proof cylindrical body 10 is in close contact with the bearing member 4 and the lower support member 5. It is characterized by being fixed.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
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 is a bridge girder and other upper structures, 2 is a bridge pier and other lower structures, and 30 is an upper structure 1 and a lower part. Each of the supporting devices is arranged between the structure 2 and fixed to the upper surface of the lower structure 2 with a bolt 40 such as an anchor bolt and a nut via a mounting flange portion 22 of the lower support member 5 described later. ing. Usually, a plurality of support devices 30 are installed at one place with a required interval, but FIG. 1 shows one of them.
[0007]
The upper support member 3 fixed directly or indirectly to the upper structure 1 is formed in, for example, a rectangular shape or a disk shape, as clearly shown in FIGS. A steel sliding member 4 having a flat sliding support upper surface is disposed on the lower surface of the upper support member 3, and the lower surface of the supporting member 4 is The curved surface 6 has a downwardly convex spherical shape, or the curved surface 6 has 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 strong and hard. The bearing member 4 may be made of a steel material or an elastic material.
[0008]
Further, the lower support member 5 disposed directly or indirectly on the lower structure 2 is, for example, a mounting flange portion having a rectangular plane provided integrally or separately on a lower portion of the disk body. The upper surface of the lower support member 5 is formed as a curved surface 7 that forms a concave spherical surface on the upper surface of the lower support member 4 so as to correspond to the convex curved surface 6 below the support member 4 or the lower portion. The upper surface of the support member 5 is a curved surface 7 (see the second embodiment in FIG. 4) that forms a spherical surface convex upward corresponding to the concave curved surface 6 below the upper support member 3. 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 in the same manner as the upper support member 3. However, the lower support member 5 may be made of another material as long as it is strong and hard.
[0009]
And it is desirable for the cylindrical outer peripheral surface 8 of the bearing member 4 and the cylindrical outer peripheral surface 9 of the lower support member 5 to have substantially the same circular outer surface shape. Over the cylindrical outer peripheral surface 8 of the bearing member 4 and the cylindrical outer peripheral surface 9 of the lower support member 5, curved surfaces 6, 7 serving as a load transmission surface and a rotational support surface therebetween are externally provided. A dust-proof cylindrical body 10 made of an elastic material such as rubber is disposed so as to be in close contact with each of the outer peripheral surfaces 8 and 9, and the entire upper surface or the upper end of the inner peripheral surface of the dust-proof cylindrical body 10 The peripheral surface is fixed to the outer peripheral surface of the bearing member 4 by baking or integral molding, and the entire lower surface of the inner peripheral surface of the dust-proof cylindrical body 10 or the inner peripheral surface of the lower end portion is the cylindrical shape of the lower support member 5. The outer peripheral surface 9 is fixed by baking or integral molding.
[0010]
The dust-proof cylindrical body 10 made of an elastic material preferably has the same thickness as a whole, but the overall length in the vertical direction may not be uniform.
[0011]
The dust-proof cylindrical body 10 made of the elastic material is preferably fixed by integral molding at the same time in the step of molding and solidifying the rubber-like elastic material to the pressure supporting member 4 and the lower support member 5. For example, when the material of the dust-proof cylindrical body 10 is a rubber material, the rubber material can be vulcanized and bonded to the steel bearing member 4 and the lower support 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 when viewed from the fulcrum on the support device side). Even when the dust-proof cylindrical body 10 is repeatedly subjected to shear deformation or elastic deformation action, it is not easily peeled off and has excellent adhesion (adhesiveness).
In order to further enhance the fixing property of the dust-proof cylindrical body 10 made of an elastic material, the outer peripheral surfaces 8 and 9 of the bearing member 4 and the lower support member 5 may be formed into rough surfaces by knurling or the like in advance. it can.
[0012]
However, the dust-proof cylindrical body 10 made of an elastic material is made of a rubber-like elastic material in advance as a belt-like plate and is wound around the outer peripheral surfaces 8 and 9 in a cylindrical shape, and the longitudinal ends of both end portions of the belt-like plate. The surfaces can be bonded together using an adhesive, and the entire inner peripheral surface or at least the upper and lower ends of the belt-shaped plate can be bonded to the outer peripheral surfaces 8 and 9 using an adhesive. .
[0013]
Further, between the upper support member 3 and the bearing member 4 fixed to the upper structure 1, as shown in FIG. 1, in order to correspond to the horizontal expansion and contraction of the upper structure 1, the horizontal direction A sliding means 43 can also be provided. 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. A sliding surface 42 or a plate, and a horizontal expansion or contraction of the upper structure 1 in a bridge axis direction or a direction perpendicular to the bridge axis between the sliding plate 42 and the sliding surface 42 which are in contact with each other. I try to escape.
[0014]
The bearing device according to the second embodiment shown in FIG. 4 has a curved surface 6 having a concave spherical surface on the lower surface of the bearing member 4 and a spherical surface having a convex surface on the upper surface of the lower support member 5. Although it is different from that of the first embodiment shown in FIG. 3 in that the curved surface 7 is used, the other components are the same and have the same operational effects. A description thereof will be omitted.
[0015]
When carrying out the present invention, the elastic bearing device may be arranged upside down so that the slide surface is positioned on the lower structure 2 side.
[0016]
In the support device of the present invention, it corresponds to the case where the upper structure 1 such as a bridge girder is tilted (rotated) and slid with respect to the central axis a of the device in the direction of arrow P in FIG. When the upper structure 1 is tilted, the upper support member 3 that is displaced in accordance with the tilt causes a shift with respect to the lower support member 5. It is possible to escape by the bearing surface 12, and therefore, the tilting of the upper structure 1 is not released, and dust or the like does not enter between the curved surfaces 6 and 7.
[0017]
When the present invention is implemented, the apparatus shown in FIG. 1 and FIG. 4 moves the upper structure 1 relative to the lower structure 2 in one or both of the horizontal direction of the bridge axis and the direction perpendicular to the bridge axis. In order to restrain the structure, a holding member may be incorporated in one of the lower structure 2 and the upper structure 1, and a known device such as a steel plate engaged with the other may be incorporated in the other, or may be independently provided separately. . If it does in this way, the support apparatus of this invention can be made into a fixed support or a slide-type movable support.
[0018]
When carrying out the present invention, the dust-proof cylindrical body 10 made of an elastic material may be a synthetic resin made of an elastic material, and as shown in FIG. 4, an annular space 44 is formed on the inner peripheral surface of the intermediate part. Thus, it may be made to respond by elastic deformation of the intermediate portion.
[0019]
【The invention's effect】
As described above, according to the support device of the present invention, the dust-proof cylindrical body made of an elastic material is simply fixed to the outer peripheral surface of the support member and the lower support member (or the upper support member when inverted). This prevents sand and other debris from entering the curved surfaces of the bearing member and the lower support member, and does not damage both curved surfaces due to wear. It is possible to exhibit a stable and stable operation over a long period of time while adapting to the tilting of the superstructure with a good deformation.
[0020]
In addition, since the dust-proof cylindrical body made of an elastic material is not provided at the sliding portion as in the prior art, the dust-proof cylindrical body is not caught on the slide surface as in the prior art. Moreover, the structure is simple, the production cost can be reduced, and it can be applied to an existing bearing device.
[0021]
Since the curved surface fitting portion, that is, the hinge portion is protected by the dustproof cylindrical body made of the elastic material, the rust prevention effect of this portion can be exhibited.
[Brief description of the drawings]
FIG. 1 is a partially longitudinal side view showing a usage mode of a first embodiment of a support device according to the present invention.
FIG. 2 is a plan view showing a part of the support device removed from FIG.
FIG. 3 is a longitudinal side view of the same.
FIG. 4 is a longitudinal side view showing a second embodiment of the present invention.
FIG. 5 is a longitudinal side view showing a conventional bearing device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Upper structure 2 Lower structure 3 Upper support member 4 Supporting member 5 Lower support member 6 Curved surface 7 Curved surface 8 Outer peripheral surface (bearing member side)
9 Outer peripheral surface (lower support member side)
DESCRIPTION OF SYMBOLS 10 Dust-proof cylindrical body 11 Dust-proof rubber ring 12 Slide surface 13 Sliding 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 (sliding surface)
43 Horizontal sliding means 44 Annular space

Claims (3)

Relative lateral movement of the upper support member 3 is arranged below the upper support member 3 arranged between the bridge girder and other upper structure 1 and the pier and other lower structure 2 and fixed to the upper structure 1. In a bearing device including a bearing member 4 that is slidably supported and a lower support member 5 that supports the bearing member 4, the lower surface of the bearing member 4 protrudes downward or downward. A curved surface 6 having a concave spherical shape, and an upper surface of the lower support member 5 being a concave surface or a curved surface 7 having an upwardly convex spherical shape, and the fitting portion between the two curved surfaces from the outside. A dust-proof cylindrical body 10 made of an elastic material is arranged over the outer peripheral surface 8 of the bearing member 4 and the outer peripheral surface 9 of the lower support member 5 so as to cover the upper portion of the dust-proof cylindrical body 10. It is fixed to the bearing member 4 and the lower part of the dust-proof cylindrical body 10 is fixed to the lower support member 5. Bearing apparatus provided with a dustproof tubular body to symptoms. The dust-proof cylindrical body 10 made of the elastic material is fixed to the bearing member 4 and the lower support member 5 at the same time by baking or molding and solidifying the dust-proof cylindrical body 10. A bearing device comprising the dust-proof cylindrical body according to claim 1. The dustproof cylindrical body according to claim 1 or 2, wherein a part or the whole of the inner peripheral surface of the dustproof cylindrical body (10) is fixed in close contact with the pressure bearing member (4) and the lower support member (5). A bearing device provided with a cylindrical body.

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