JP6600619B2 - Support plate support - Google Patents

Description

  The present invention relates to a support plate support, and more particularly to a support plate support that is installed between an upper structure and a lower structure in a bridge and transmits a load of the upper structure to the lower structure.

  As one of the supports for transmitting the load of the superstructure to the substructure in the bridge, there is known a support plate support that has a horizontal movement function and a vertical rotation function of the superstructure by sliding in addition to the load transmission function. . The bearing plate bearing includes a sealed rubber bearing plate bearing and a high-strength brass bearing plate bearing (see Non-Patent Document 1, for example).

  Sealed support plate support is made by inserting a rubber plate (elastic body) into a recess provided in the lower arm and fitting an intermediate plate to seal the rubber plate, and also providing a recess on the upper surface of the intermediate plate to provide tetrafluoroethylene resin. A sliding plate made of (PTFE) is fitted, a vertical rotation function is provided by elastic deformation of the rubber plate, and a horizontal movement function is provided by sliding with the upper plate of the sliding plate.

  The high-strength brass support plate support is a sliding plate made of PTFE by fitting a support plate having a convex spherical surface formed on the bottom surface to a concave spherical surface portion provided on the lower arm and providing a recess on the top surface of the support plate. Are fitted, and a vertical rotation function is given by sliding between spherical parts, and a horizontal movement function is given by sliding with the upper plate of the sliding plate.

  However, these conventional support plate supports have the following problems. That is, the sealed rubber support plate support has a problem that a rubber plate or a slide plate made of PTFE having poor wear resistance is likely to pop out due to long-term use and lacks durability. Further, the high strength brass support plate support is easy to slide using a high strength brass casting for the support plate, but has a problem that it is hard and easy to break. For these reasons, these conventional support plate supports cannot achieve high surface pressure.

“Road Bridge Support Manual (revised version)”, Japan Road Association, August 2008, p. 43-45

The present invention has been made based on the technical background as described above, and achieves the following object.
An object of the present invention is to provide a support plate support capable of increasing the surface pressure.

The present invention employs the following means in order to achieve the above object.
That is, according to the present invention, an upper collar fixed to the lower surface of the upper structure, a lower collar fixed to the upper surface of the lower structure and provided with a concave curved surface portion on the upper surface, and the upper surface between the upper collar and the horizontal direction. The support plate support includes a flat plate portion that causes slippage, and a support plate that is formed on the convex curved surface portion that has a lower surface fitted into the concave curved surface portion and causes the upper structure to rotate in the vertical direction. And
The support plate is made of steel, a recess is formed in the flat portion of the support plate, and a slip plate is fitted into the recess,
A recess is formed on the upper surface of the lower collar, and a slide seat in which the concave curved surface is formed is fitted in the recess.
The sliding plate and the sliding seat are resin materials having excellent low friction, wear resistance and load resistance, and are polyamide, polyacetal, polycarbonate, polyphenylene ether, polybutylene terephthalate, ultrahigh molecular weight polyethylene, polyfluorinated. It consists of one selected from vinylidene, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, polyamideimide, polyetherimide, polyetheretherketone, polyimide, liquid crystal polymer and nylon,
The ratio of the curvature radius of the convex curved surface portion to the bearing pressure diameter of the bearing plate is 1.0 <curvature radius / bearing diameter <2.0 .

According to the present invention, the problems caused in the conventional sealed bearing plate bearing and the high strength brass bearing plate bearing are solved, and therefore, the surface pressure can be increased.

It is sectional drawing which shows embodiment of the support plate support by this invention. It is an AA arrow directional plan view of FIG. It is the semi-sectional view which showed the installation form of the support plate support by this invention, and was seen to the bridge-axis direction. It is the half sectional view which showed the installation form and was seen in the bridge axis perpendicular direction.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of a support plate support according to the present invention, and FIG. 2 is a plan view taken along line AA in FIG. The support plate support 1 includes an upper rod 2 fixed to the upper structure, a lower rod 3 fixed to the lower structure, and a support plate 4 disposed between the upper and lower rods 2 and 3.

  The upper collar 2 is made of steel and has a rectangular shape in plan view. A key hole 5 for fitting a shear key for fixing to the upper structure is provided at the center of the upper surface of the upper collar 2. Further, flanges 6 and 6 for receiving the uplift force are provided on both side portions of the upper rod 2 along the bridge axis direction.

  A rectangular recess 7 is provided on the lower surface of the upper collar 2. The recess 7 is of a size that covers almost the entire lower surface of the upper collar 2. A slip plate 8 for causing a slip between the recess 7 and the support plate 4 is fitted and fixed by an adhesive or the like. The sliding plate 8 is made of metal, and for example, a stainless plate is used. The thickness of the sliding plate 8 is equal to the depth of the recess 7, and therefore the sliding plate 8 is flush with the lower surface of the upper collar 2.

  The lower arm 3 is made of steel and has a rectangular shape in plan view. The lower collar 3 is provided with a circular recess 9 opened on the upper surface thereof. A sliding seat 10 is fitted in the recess 9 and is fixed by an adhesive or the like. A concave spherical surface portion 11 is formed on the upper surface of the slide seat 10 so that the center of the plan view of the slide seat 10 and the center of the curved surface coincide with each other. The thickness of the slide seat 10 around the concave spherical portion 11 is equal to the depth of the concave portion 9, so that the upper surface of the slide seat 10 excluding the concave spherical portion 11 is flush with the upper surface of the lower collar 3.

  The slide seat 10 is made by molding a resin material excellent in low friction, wear resistance and load resistance. Polyamide (PA) can be used as a resin material excellent in low friction, wear resistance and load resistance. In addition to polyamides, polyacetal, polycarbonate, polyphenylene ether, polybutylene terephthalate, ultrahigh molecular weight polyethylene, polyvinylidene fluoride, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, polyamideimide , Polyetherimide, polyetheretherketone, polyimide, liquid crystal polymer, nylon and the like can be used.

  The support plate 4 is made of steel and is circular in plan view. The support plate 4 has an upper surface formed on the flat surface portion 12 and a lower surface formed on the convex spherical surface portion 13. The curvature of the convex spherical portion 13 is equal to the curvature of the concave spherical portion 11, so that the convex spherical portion 13 fits closely to the concave spherical portion 11. Due to the fitting between the convex spherical surface portion 13 and the concave spherical surface portion 11, a slip is generated between the support plate 4 and the slide seat 10, and the support plate 4 can be rotated in the vertical direction. In order to ensure this vertical sliding range, the area of the convex spherical surface portion 13 is made larger than the area of the concave spherical surface portion 11, and the outer peripheral portion of the convex spherical surface portion 13 is shown in the neutral position where no rotation occurs. A non-contact portion 13a that does not contact the concave spherical surface portion 11 is formed.

  A circular recess 14 is provided in the flat surface portion 12 of the support plate 4. A slip plate 15 is fitted into the recess 14 and is fixed by an adhesive or the like. The thickness of the slide plate 15 is slightly larger than the depth of the recess 14, and therefore the slide plate 15 slightly protrudes from the recess 14. When the sliding plate 15 contacts the sliding plate 8 of the upper rod 2, a horizontal slip occurs between the upper rod 2 and the support plate 4. In order to secure this horizontal sliding range, the length of the sliding plate 8 is made larger than the diameter (supporting pressure diameter) of the flat surface portion 12 of the support plate 4.

  The slide plate 15 is formed by molding a resin material having excellent low friction, wear resistance and load resistance, similar to the slide seat 10, and for example, polyamide (PA) can be used. In addition to polyamide, resin materials having the same properties as those described above, that is, those listed as the resin material of the slide 10 as described above can be used.

Here, the relationship (ratio) between the diameter (bearing pressure diameter) of the flat surface portion 12 of the support plate 4 and the curvature radius of the convex curved surface portion 13 is 1.0 <curvature radius / bearing pressure diameter <2.0. In this embodiment, it is 1.5. Although the conventional high strength brass bearing plate bearing was the radius of curvature / Bearing diameter = 1.0 of the bearing plate, it is possible to thin the support plate by the ratio within the above range, bearing overall Compactness can be achieved. When the radius of curvature / bearing diameter is 1.0 or less, the thickness is almost the same as that of the conventional high strength brass bearing plate bearing, while the radius of curvature / bearing pressure is 2.0 or more. The ratio range is desirable because the followability of rotation of the support plate is deteriorated.

  3 and 4 show the installation form of the above-mentioned support plate support 1 in the bridge, FIG. 3 is a half sectional view seen in the bridge axis direction, and FIG. 4 is a half sectional view seen in the direction perpendicular to the bridge axis. In each figure, reference numeral 20 denotes an upper structure that is a bridge girder, and reference numeral 21 denotes a lower structure that is a pier or an abutment.

  A shear key 22 for transmitting a horizontal force acting on the upper structure is fitted into the keyhole 5 in the upper rod 2 and fixed to the upper structure 20 by a set bolt 23 (in the case of a steel girder). The lower rod 3 is installed on a base plate 24 fixed to the lower structure 21 via anchor bolts 25. The lower rod 3 is fixed to the base plate 24 by welding, and the base plate 24 is provided with a detent plate 26 for preventing the lower rod 3 from shifting in the bridge axis direction.

  A pair of side blocks 27 for restricting the movement of the upper rod 2 in the direction perpendicular to the bridge axis, that is, for restricting the movement of the upper structure 20 in the same direction, are fixed to the base plate 24 by bolts 28. These side blocks 27 are provided with flanges 29 protruding toward the upper collar 2. By engaging the flange 6 of the upper collar 2 with the lower surface of the flange 29, the lifting force acting on the upper structure 20 is received.

  In the support plate support installed as described above, the vertical load of the upper structure 20 is transmitted to the lower structure 21 via the upper rod 2, the support plate 4, the lower rod 3 and the base plate 24. Further, the sliding between the sliding plate 8 of the upper rod 2 and the sliding plate 15 of the support plate 4 enables the horizontal movement of the upper structure 20 in the bridge axis direction. Furthermore, when the sliding occurs between the support plate 4 and the sliding seat 10 of the lower arm 3, the upper structure 20 can be rotated vertically.

  And according to the said support plate support, the support plate 4 consists of a thing made from steel, and the convex shape of the support plate 4 provided in the slide plate 15 provided in the plane part of this support plate 4, and the lower collar 3. FIG. Since the slide seat 10 into which the spherical surface portion 13 is fitted is made of a resin material having excellent low friction, wear resistance and load resistance, it occurs in the conventional sealed rubber bearing plate bearing and high strength brass bearing plate bearing. Therefore, a high surface pressure can be achieved.

  The above embodiment is merely an example, and the present invention can take various aspects. For example, in the above embodiment, the curved surface portion of the support plate and the slide seat is a spherical portion in order to enable vertical rotation of the upper structure in all directions, but the curved surface portion of the support plate and slide seat is a cylindrical surface portion in one direction. In some cases, vertical rotation is possible.

1: Bearing plate bearing 2: Upper rod 3: Lower rod 4: Bearing plate 8: Sliding plate 9: Recess 10: Sliding seat 11: Concave spherical portion 13: Convex spherical portion 15: Sliding plate 20: Upper structure 21: Lower portion Construction

Claims (1)

An upper surface fixed to the lower surface of the upper structure, a lower surface fixed to the upper surface of the lower structure and provided with a concave curved surface portion on the upper surface, and a plane on which the upper surface causes a horizontal slip between the upper surface and the upper surface A support plate support provided with a support plate formed on each of the convex curved surface portions, the lower surface of which is fitted into the concave curved surface portion to cause the upper structure to rotate in the vertical direction,
The support plate is made of steel, a recess is formed in the flat portion of the support plate, and a slip plate is fitted into the recess,
A recess is formed on the upper surface of the lower collar, and a slide seat in which the concave curved surface is formed is fitted in the recess.
The sliding plate and the sliding seat are resin materials having excellent low friction, wear resistance and load resistance, and are polyamide, polyacetal, polycarbonate, polyphenylene ether, polybutylene terephthalate, ultrahigh molecular weight polyethylene, polyfluorinated. It consists of one selected from vinylidene, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, polyamideimide, polyetherimide, polyetheretherketone, polyimide, liquid crystal polymer and nylon,
The ratio of the curvature radius of the convex curved surface portion to the bearing pressure diameter of the bearing plate is 1.0 <curvature radius / bearing diameter <2.0 .

Images