JP4139722B2 - Dust proof device for load support plate in bearing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is used for a bearing device such as a sliding bearing device used for supporting an upper structure such as a bridge girder of a bridge, and is dust-proof for a load support plate in the bearing device for dust-proofing a sliding surface in the bearing device. It relates to the device.
[0002]
[Prior art]
Conventionally, as a dust-proof means for preventing foreign matters such as dust from entering a sliding surface of a bearing device such as a sliding bearing device, a rubber material such as a solid rubber packing is brought into contact with the sliding surface. There is known a dustproof means of a type to be used (see, for example, Patent Document 1).
However, in the case of the type in which the rubber packing is directly slid as described above, the rubber packing is worn early and the rubber packing is worn quickly because it causes compression deformation, shear deformation and bending deformation. There is a problem that durability is low.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-220813, FIG.
[0004]
[Problems to be solved by the invention]
The present invention relates to a dustproof device for a load support plate in a bearing device such as a sliding bearing device that can improve the durability of the dustproof packing made of an elastic material without causing early wear of the dustproof packing made of an elastic material such as dustproof rubber. The purpose is to provide.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, in the dustproof device for a load supporting plate in the bearing device according to claim 1, it is used for a sliding bearing device used to support an upper structure such as a bridge girder of a bridge, A dust-proof device for a load support plate provided on a load support plate of the elastic support body in the support device for dust-proofing a sliding surface in the support device having an elastic support body integrally provided with an elastic layer such as rubber at an intermediate portion In FIG. 2, an annular groove 5 having a concave cross-section with an upward opening is provided along the peripheral edge in the lateral direction on the upper surface of the load support plate 1 in the bearing device, and an annular sliding member 6 is provided on the upper part of the annular groove 5. body of elastic material-made annular dustproof packing 7 provided with the slidably is inlaid in the vertical direction, that is pressed against the upper structure side by the elastic force of the upper surface of the sliding member 6 is the dust-proof packing 7 And butterflies.
[0006]
The invention according to claim 2 is characterized in that, in the invention according to claim 1, the annular elastic material packing 7 is formed of a tubular annular elastic body.
[0007]
According to a third aspect of the present invention, in the first aspect of the present invention, the annular elastic material packing 7 has a lower surface 36 having an arcuate cross section in the lower surface width direction intermediate portion toward the vertical direction intermediate portion of the packing body. A convex lower annular groove 21 comprising an inner inclined surface 11 and an outer inclined surface 12 connected to the arcuate lower surface 36, and an inner annular leg portion 13 formed by an inner portion of the lower annular groove 21. The outer annular leg portion 14 is formed symmetrically by the outer portion of the lower annular groove 21, and the lower end portion of each leg portion is formed in an arc shape.
[0008]
According to a fourth aspect of the present invention, in the first aspect of the present invention, the annular elastic material packing 7 has an upper flat lower surface at the lower surface width direction intermediate portion toward the vertical intermediate portion of the packing body. 10 and an inner inclined surface 11 and an outer inclined surface 12 connected to the flat lower surface, a lower annular groove 21 having a substantially trapezoidal cross section is provided, and an inner portion of the lower annular groove 21 is provided inside. 2. The load supporting plate dustproof device according to claim 1, wherein the annular leg portion and the outer annular leg portion are formed symmetrically by the outer portion of the lower annular groove.
[0009]
The invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, a sliding member made of an ethylene tetrafluoride plate is fixed to the upper part of the packing 7 made of elastic material. To do.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0011]
1 to 3 show a first embodiment of a load-carrying plate dustproof device in a bearing device according to the present invention, which is provided with an elastic layer 4 such as rubber at an intermediate portion and a steel disk. The elastic support body 2 having the load support plate 1 made of a steel-like upper steel material penetrates the upper surface 3 of the disk-shaped load support plate 1 and the upper surface of the rust preventive rubber layer 24 that covers the load support plate 1. As described above, an annular groove 5 having a groove shape (a box shape such as a square) having an upward opening is provided along the peripheral edge portion, and the annular groove 5 is made of an elastic material in the dust-proof packing 9 with a sliding member. The main body 7a of the dust-proof packing 7 is fitted so as to be slidable in the vertical direction and locked so as not to move laterally. The lower surface of the sliding member 6 made of an annular plate or the like is bonded to the upper surface of the annular dust-proof packing 7 made of an elastic material. Fixed with a material, etc. Packing 9 is configured.
[0012]
A body 7a of the elastic material dustproof packing 7 is provided in the annular groove 5 so as to be vertically slidable along with the elastic deformation of the lower leg portion of the elastic material dustproof packing 7, and the sliding member. The upper surface of 6 is pressed against a sliding surface 26 such as a stainless steel plate on the upper structure 8 side by the elastic force of the dust-proof packing 7.
[0013]
The annular elastic material packing 7 includes an upper flat bottom surface 10 and an inner steeply inclined surface 11 connected to the flat bottom surface 10 in the lower surface width direction intermediate portion toward the vertical intermediate portion of the packing body 7a. A lower annular groove 21 having a substantially trapezoidal cross section formed on the outer steeply inclined surface 12 is provided, and a radially inner portion of the lower annular groove 21 is an inner annular leg portion 13, and the lower annular groove A radially outer portion 21 is an outer annular leg 14.
[0014]
The upper part of the annular dustproof packing 7 made of elastic material is provided with an inner gently inclined surface 15 that rises with a gentle inclination from the radially inner side to the outer side on the radially inner side. A flat upper surface portion 16 to be connected is provided, and an outer gently inclined surface 17 on the radially outer side to be connected to the flat upper surface portion 16 is provided, and the upper surface portion 16 is made of an annular tetrafluoroethylene plate. The lower surface of the sliding member 6 is fixed by an adhesive or integral molding.
[0015]
In addition, a vertical inner peripheral side surface 18 is provided on the inner side of the packing 7 and a vertical outer peripheral side surface 19 is provided on the outer side. The upper inner gently inclined surface 15 and the lower inner steeply inclined surface 11 are defined as follows. Are connected by an inner vertical inner peripheral surface 18, the upper outer gently inclined surface 17 and the lower outer steeply inclined surface 12 are connected by an outer vertical outer peripheral side surface 19, and the dust-proof packing 9 with a sliding member is vertically in cross section. It is formed symmetrically about the center line.
[0016]
The longitudinal inner peripheral side surface 18 and the longitudinal outer peripheral side surface 19 of the elastic material packing 7 are brought into contact with the inner peripheral side and outer peripheral side peripheral surfaces in the annular groove 5 of the load support plate 1, respectively. 7 is configured such that an inner gentle inclined surface 15 and an outer gentle inclined surface 17 protrude from the upper surface 3 of the load support plate 1. The width between the longitudinal inner circumferential side surface 18 and the longitudinal outer circumferential side surface 19 in the elastic material packing 7 is set to be the same as or slightly smaller than the width of the annular groove 5, and the elastic material packing 7 It is good to set it as the dimension of the grade which contacts the inner peripheral side surface of the annular groove 5 in the state pressed by the structure 8 side.
[0017]
As the sliding member 6, for example, a Teflon (registered trademark) plate, that is, a tetrafluoroethylene plate is used, and a material other than Teflon (registered trademark) may be used. However, when a material having a low coefficient of friction with a metal plate or the like is used. Good.
[0018]
A circular recess 20 is provided at the center of the load support plate 1, and a slip support member 22 made of a tetrafluoroethylene plate or the like is provided in the recess 20. Further, the upper surface of the load supporting plate 1 and its side peripheral surface and the upper surface and the side peripheral surface of the lower steel member 23 are covered with a rust-preventing rubber layer 24 integrally with the elastic layer 4. The upper surface of the slide support member 22 is an upper surface that supports the slide while supporting the load of the upper structure 8 and allowing the rotation of the upper structure 18 by a minute angle due to expansion and contraction or bending.
[0019]
In a state where the dust-proof packing 9 with a sliding member is fitted and locked in the annular groove 5, the upper surface of the sliding member 6 in the dust-proof packing 9 with a sliding member is positioned at a higher level than the upper surface of the sliding support member 22. Is set to
[0020]
In addition, a lower steel material 23 having a recess is integrally fixed to the lower portion of the elastic layer 4 in the elastic support body 2 by integral molding.
[0021]
Thus, when the support device 25 incorporating the elastic support body 2 having the elastic layer 4 as shown in FIG. 4 is used for a bridge or the like, as shown in FIG. When a downward biased load indicated by an arrow A is applied to the other side, a negative reaction force (upward reaction force) indicated by an arrow B acts on the other end side in the road width direction, and the sliding bearing device 25 on the other end side accordingly. Even if one side portion of the sliding support surface between the upper structure 8 and the upper structure 8 moves away from each other, in the present invention, the inner annular leg portion 13 and the outer annular leg portion 14 of the dust-proof packing 9 with the sliding member are In the original shape, that is, in the state shown in FIG. 2, the leg portions 13 and 14 are extended, so that they are pressed against the sliding surface with the upper structure 8, and dust and the like enter. Is prevented.
[0022]
Further, the upper part of the body of the elastic material dustproof packing 7 is not provided on the extended surface of the circumferential surface of the annular groove 5 of the load support plate 1 but escapes from the upper end of the circumferential surface of the annular groove 5 toward the center in the width direction. Since the chamfering is provided by the flat inclined surfaces 15 and 17 rising upward, the upper peripheral surface of the dust-proof packing 7 enters the radially inner or outer sliding surface side of the annular groove 5 with shear deformation. Fear can be eliminated.
[0023]
In this embodiment, since the lower end portions of the annular leg portions 13 and 14 of the packing 7 made of elastic material are formed in an acute angle and bilaterally symmetrical, the stability of the packing 7 is good, and the stainless plate 32 on the upper structure 8 side. can be reliably pressed against the restoring force of the packing 7 is good, good followability for the superstructure 8 wander.
[0024]
Further, since the sliding member 6 made of an ethylene tetrafluoride plate is provided on the upper part of the dustproof packing 7, the sliding member 6 has a small friction coefficient with the sliding surface 26 of the stainless steel plate on the upper structure 8 side. This also eliminates the possibility that the upper part of the dustproof packing 7 is shear-deformed in the lateral direction. The stainless steel plate 32 is fixed to the lower surface of a steel plate upper bar 34 fixed to a lower flange 37 of the upper structure 8 such as a girder 33 via a steel plate sole plate 35 with screws or the like.
[0025]
In the case of the sliding elastic support device 25 described above, the opposed inner side surfaces of the lower support member 28 having the base plate 31 fixed to the lower structure 27 are provided so as to face each other at an interval in the bridge axis direction. The elastic bearing member 2 is fitted and disposed between the planar arc-shaped shear restraint walls 29 to restrain the transverse shear deformation of the elastic layer 4, and the anchor bolt 30 fixed to the lower portion of the lower support member 28 is provided. It is embedded and fixed in the lower structure 27.
[0026]
Next, a second embodiment of the load supporting plate dustproof device in the bearing device of the present invention will be described with reference to FIGS. 6 and 7.
[0027]
Since this embodiment and the portion different from the above embodiment are portions of the elastic material packing 7, this portion will be mainly described. In this embodiment, the annular elastic material packing 7 has a circular arc-shaped lower surface 36 and an inner inclined surface connected to the circular arc-shaped lower surface 36 in the lower surface width direction intermediate portion toward the vertical intermediate portion of the packing body. 11 and an outer inclined surface 12, and a convex lower annular groove 21 is provided, and an inner annular leg 13 is formed by an inner portion of the lower annular groove 21, and an outer annular leg is formed by an outer portion of the lower annular groove 21. Part 14 is formed, and the lower ends of the annular leg parts 13 and 14 are formed on arcuate outer surfaces 13a and 13b. In addition, the cross-sectional shape of the annular groove 5 is a vertically long rectangular shape, but the other configurations are the same as those in the above-described embodiment. Is omitted.
[0028]
In this embodiment, since the lower end portions of the annular leg portions 13 and 14 of the packing 7 made of elastic material are formed in an arc shape, the member thickness of the lower end portion is thicker than that in the case of the first embodiment. The lower rigidity of the legs 13 and 14 is relatively high, the vertical pressing force against the stainless steel plate 32 on the upper structure 8 side can be relatively increased, the restoring force of the packing 7 in the vertical direction is also high, and the upper structure Good followability to fluctuation on the object 8 side.
[0029]
Next, a load supporting plate dustproof device in a support device according to a third embodiment of the present invention will be described with reference to FIGS.
[0030]
In this embodiment, the annular elastic material packing 7 is constituted by a hollow elastic body 38 of a rubber tube or a synthetic resin tube, and a sliding member 6 made of an annular tetrafluoroethylene plate is bonded to the upper portion thereof. The dust-proof packing 9 with a sliding member is constituted by being fixed by a material or the like. It should be noted that a linear rubber tube body whose both ends are released, or a linear hollow elastic body 38 filled with air or a sliding member 6 made of an annular tetrafluoroethylene plate on the hollow annular elastic body 38. May be fixed by an adhesive. Also in this embodiment, the vertical middle portion of the hollow elastic body 38 moves vertically on the inner peripheral surface of the annular groove 5 although it is minute in the vertical direction as the upper structure 8 moves up and down.
[0031]
When the hollow elastic body 37 is configured, an elastic restoring force of the rubber tube itself or an internal pressure such as air pressure may be used. Since other configurations are the same as those of the first embodiment, the same parts are denoted by the same reference numerals, and the description thereof is omitted.
[0032]
In the illustrated embodiment, the embodiment is shown in which the sliding elastic bearing device having an elastic bearing body such as a rubber layer is shown. However, the present invention may be implemented in a bearing device other than the elastic bearing. Further, either one of the sliding member 6 and the elastic material dustproof packing 7 may be a split annular body.
[0033]
In the above-described embodiment, the lower part of the support device 25 is fixed to the lower structure 27 side and the upper surface side of the support device 25 is a sliding surface. However, as shown in FIG. The support device 25 is fixed to the upper structure 8 side in an inverted manner, the lower surface side of the support device 25 is placed on the upper surface of the stainless steel plate 32 fixed to the lower structure 27, and the upper surface of the stainless steel plate 32 is placed on the upper surface. You may make it apply the dustproof apparatus of this invention also to the form made into a slip surface.
[0034]
【The invention's effect】
According to the present invention, the bearing is used in a sliding bearing device used for supporting an upper structure such as a bridge girder of a bridge, and has an elastic bearing body integrally provided with an elastic layer such as rubber at an intermediate portion. In a dust-proof device for a load support plate provided on a load support plate of the elastic support body in a support device for dust-proofing a sliding surface in the device, on the upper surface of the load support plate 1 in the support device, along the peripheral edge in the lateral direction. An annular groove 5 having a concave groove shape with an upward opening is provided, and the main body of an annular dustproof packing 7 made of an elastic material provided with an annular sliding member 6 on the upper part thereof is fitted in the annular groove 5 so as to be slidable in the vertical direction. Since the upper surface of the sliding member 6 is pressed against the upper structure side by the elastic force of the dust-proof packing 7, the dust-proof packing does not directly contact and slide on the structure side. Polish the packing It can be without, be used for a long packing in a stable state.
[0035]
Further, when the packing made of the annular elastic material is tubular and has an annular elastic body as in claim 2, a ready-made product such as a rubber tube can be used, and the packing can be manufactured at low cost.
[0036]
Further, since the lower end portions of the annular leg portions 13 and 14 of the elastic material packing 7 are formed in an arc shape as in claim 3, the member thickness at the lower end portion is relatively thick, and the lower portion of the annular leg portion is rigidity is relatively high, the pressing force can be relatively enhanced with respect to the upper structure side, and when the packing is perpendicular sliding in the annular groove may stability of packing, to the superstructure wander Thus, the upper surface of the sliding member can be brought into surface contact and pressed , and the dustproof effect is high, and the restoring force of the packing is high, and the followability to the fluctuation on the upper structure side is good.
[0037]
Further, according to the fourth aspect of the present invention, the annular elastic material packing has an upper flat lower surface and an inner side connected to the flat lower surface in the lower surface width direction intermediate portion toward the vertical intermediate portion of the packing body. A lower annular groove having a substantially trapezoidal cross section with an inclined surface and an outer inclined surface is provided, and an inner annular leg portion is formed by an inner portion of the lower annular groove, and an outer annular shape is formed by an outer portion of the lower annular groove. If the legs are formed, the packing shape is relatively simple, so it can be manufactured at a low cost, and when the packing slides up and down in the annular groove, the packing stability is improved. Well, the upper surface of the sliding member can be surely pressed against the fluctuation on the upper structure side, and it can be pressed , and the dustproof effect is high, and the restoring force of the packing is good, and the followability to the fluctuation on the upper structure side is good But There.
[0038]
Furthermore, when a tetrafluoroethylene plate is used as the sliding member as in claim 5, the tetrafluoroethylene plate and the stainless plate are more than the friction coefficient between rubber and stainless steel or steel metal as in the conventional case. Therefore, the elastic dust-proof packing 7 has good followability to fluctuations in the upper structure, and the burden on the shearing force in the lateral direction of the dust-proof packing is reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view showing a dustproof device for a load supporting plate in a support device according to a first embodiment of the present invention.
FIG. 2A is a longitudinal side view showing an elastic bearing body taken out, and FIG. 2B is a longitudinal side view showing a part of FIG.
FIG. 3 is a plan view of an elastic bearing member.
FIG. 4 is a bullet side view showing a sliding elastic support device.
FIG. 5 is an explanatory diagram for explaining that a negative reaction force (upward reaction force) acts on the other end side in the road width direction when a downward biased load acts on one end side in the road width direction by a vehicle or the like. is there.
FIG. 6 is a longitudinal side view showing a dustproof device for a load supporting plate in a support device according to a second embodiment of the present invention.
FIG. 7A is a longitudinal side view showing an elastic bearing body taken out, and FIG. 7B is a longitudinal side view showing a part of FIG.
FIG. 8 is a longitudinal side view showing a load supporting plate dustproof device in a bearing device according to a third embodiment of the present invention.
FIG. 9A is a longitudinal side view showing an elastic support taken out, and FIG. 9B is a longitudinal side view showing a part of FIG.
FIG. 10 is a longitudinal sectional side view showing a state where the support device is reversed and the dustproof packing is used upside down.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Load support plate 2 Elastic support body 3 Upper surface 4 Elastic layer 5 Annular groove 6 Sliding member 7 Annular dustproof packing 8 made of elastic material Upper structure 9 Dustproof packing 10 with a sliding member Bottom 11 Inside steeply inclined surface 12 Outside steeply inclined surface 13 Inside Annular leg part 14 Outer annular leg part 15 Inner gentle inclined surface 16 Flat annular upper surface 17 Outer gentle inclined surface 18 Longitudinal inner peripheral surface 19 Vertical outer peripheral side surface 20 Sliding surface 21 Lower annular groove 22 Sliding support member 23 Lower steel member 24 For rust prevention Rubber layer 25 Sliding bearing device 26 Sliding surface 27 Lower structure 28 Lower support member 29 Shear restraint wall 30 Anchor bolt 31 Base plate 32 Stainless steel plate 33 Girder 34 Upper bar 35 Sole plate 36 Arc-shaped lower surface 37 Lower flange 38 Hollow annular body

Claims (5)

It is used in sliding bearing devices used to support superstructures such as bridge girders of bridges, and the sliding surface in the above-mentioned supporting device having an elastic bearing body integrally provided with an elastic layer such as rubber in the middle is dustproof. In a dust-proof device for a load support plate provided on a load support plate of the elastic support body in a support device for carrying out, a cross-sectional concave groove having an upward opening on a top surface of the load support plate in the support device along a lateral peripheral portion thereof An annular groove body made of an elastic material having an annular sliding member on the upper portion thereof is slidably fitted in the annular groove so that the upper surface of the sliding member is protected against the dust. A dustproof device for a load supporting plate in a bearing device, wherein the dustproof device is pressed against the upper structure side by the elastic force of the packing.   2. The dustproof device for a load support plate in a bearing device according to claim 1, wherein the annular elastic material packing is constituted by a tubular annular elastic body.   The annular elastic material packing has an upper surface formed of a cross-section arc-shaped lower surface and an inner inclined surface and an outer inclined surface connected to the arc-shaped lower surface in the lower surface width direction intermediate portion toward the vertical intermediate portion of the packing body. A convex lower annular groove is formed, and an inner annular leg portion is formed symmetrically by an inner portion of the lower annular groove, and an outer annular leg portion is formed symmetrically by an outer portion of the lower annular groove. The load supporting plate dustproof device for a bearing device according to claim 1, wherein the lower end portion is formed in an arc shape.   The annular elastic material packing has a flat lower surface on the upper side and an inner inclined surface and an outer inclined surface connected to the flat lower surface in the lower surface width direction intermediate portion toward the vertical intermediate portion of the packing body. A lower annular groove having an approximately convex trapezoidal cross section is provided, and an inner annular leg is formed symmetrically by an inner portion of the lower annular groove and an outer annular leg is formed by an outer portion of the lower annular groove. The dustproof device for a load supporting plate in the bearing device according to claim 1.   5. A load-carrying plate dustproof device for a bearing device according to any one of claims 1 to 4, wherein a sliding member made of an ethylene tetrafluoride plate is fixed to the upper part of the elastic material packing.

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