JPS605065Y2 - wind bearing - Google Patents

Description

[Detailed description of the invention] The present invention provides a cable-stayed bridge in which the bridge girder is supported by a tower pillar provided at the center of the bridge and several wire ropes that are hung from the tower pillar to the bridge girder. This relates to the wind bearings that support the lower bridge girders on the piers.

Here, in the cable-stayed bridge shown in Fig. 1, the wind bearing is installed on the pier C and attached to the bridge girder under the column A, as shown in Fig. 2 B, and is used to carry the vertical load of the bridge girder. The main support E, such as a roller bearing, has the function of supporting the bridge girder and allowing expansion, contraction, and deflection in the axial direction of the bridge. Accept the number so that no (lateral) force acts on it,
It also has a release function, and serves to prevent damage to the main support E caused by forces acting in the X□ and X2 directions.

Conventionally, the above-mentioned wind bearing has a structure as shown in FIG. 3, that is, an upper shoe 1 attached to an upper structure such as a bridge girder has recesses 2 facing each other on both sides in the direction perpendicular to the bridge axis. , the concave portion 2 has a convex curved surface 3 on one side.
A bearing plate 4 having a bearing pressure plate 4 is fitted to the lower shoe 5, which is attached to a lower structure such as a bridge pier. A standing wall 6 is formed facing each other in the direction perpendicular to the bridge axis, and a sliding plate 7 is arranged on the standing wall 6. The upper shoe 1 has a structure in which the bearing plate 4 of the upper shoe 1 is inserted between the vertical walls 6 of the lower shoe 5 in sliding contact with the sliding contact plate 7 of the lower shoe 5.

However, with this structure, the bearing pressure plate 4 and the sliding contact plate 7 do not necessarily make good sliding contact due to manufacturing or installation errors, and if a gap occurs between the bearing pressure plate 4 and the sliding contact plate 7. , the gap acts on the main support C, which is not designed to support lateral forces, causing a problem of damaging the main support C, and when a pressurized state occurs, the bearing pressure plate 4 The sliding contact between the sliding contact plate 7 is restricted and cannot follow the expansion and contraction of the bridge girder, causing problems such as damage to the bridge girder due to the displacement force caused by the expansion and contraction.

Furthermore, since the contact between the bearing pressure plate 4 and the sliding contact plate 7 is a line contact, the bearing pressure stress is large, causing problems such as increased wear and frictional resistance.

The present invention solves these problems, and the upper shoe, which is attached to a superstructure such as a bridge girder, has grooves extending along the bridge axis on both sides of the shoe in the direction perpendicular to the bridge axis. Intermediate plates each having a circular concave portion are disposed in each of the concave grooves via a set of adjustment wedge plates, and sliding plates are disposed in each of the circular concave portions of the intermediate plate via a rubber plate. On the other hand, the lower shoe that is attached to the lower structure such as a bridge pier has a bottom plate and the bottom plate integrated with it.
It is composed of vertical walls that face each other at a predetermined interval in the direction perpendicular to the bridge axis and are formed along the bridge axis direction, and the lower shoe has a recess that runs along the bridge axis direction by the bottom plate and the vertical wall. A sliding contact plate is fixed to each opposing surface of the lower shoe standing wall, and the upper shoe has a sliding plate of the upper shoe fixed to a recess of the lower shoe. To provide a window support which is brought into sliding contact with a sliding contact plate of a standing wall.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 4, 5, and 6.

The upper shoe 10 is attached to the upper structure such as a bridge girder and connected to the tower column, and the upper shoe 10 has grooves 11 formed along the bridge axis on both sides of the bridge. has been done.

Reference numeral 12 denotes an intermediate plate, and a circular recess 13 is formed in the center of one surface of the intermediate plate. It is fitted on the outside.

Reference numeral 14 denotes a rubber plate that is tightly housed in the circular recess 13, and the rubber plate 14 has a peripheral edge at one end thereof.
A metal compression ring 15 is fitted.

16 is a sliding plate arranged on the rubber plate 14, one side of the sliding plate 16 is in contact with the rubber plate 14, and the other side is arranged so as to protrude from the circular recess 13 of the intermediate plate 12, It comes into sliding contact with a sliding contact plate that will be described later.

17 is a seal ring, and the seal ring 17 is fitted into the intermediate plate 12 so as to surround the circular recess 13 formed in the intermediate plate 12.
This is to prevent foreign matter from entering the sliding contact portion between the sliding plate 16 and the sliding contact plate.

1B, 19 are adjustment wedge plates disposed between the groove 11 of the upper shoe 10 and the intermediate plate 12;
Reference numeral 9 consists of a rectangular plate having a tapered surface on one side, and the tapered surfaces are made to match each other to form a negative set of adjusting wedge plates.

By moving the adjusting wedge plates 1B, 19 in the direction of the bridge axis, the intermediate plate 12 arranged on the adjusting wedge plates 1B, 19 is moved in the direction perpendicular to the bridge axis, in other words, on the side of the standing wall of the lower shoe which will be described later. By moving it, the gap between the sliding plate of the lower shoe standing wall and the sliding plate arranged in the recess of the intermediate plate is adjusted.

20 is a lower shoe attached to a lower structure such as a bridge pier, and the lower shoe 20 is formed integrally with a bottom plate 21 and facing each other at a predetermined interval in a direction perpendicular to the bridge axis, and is formed along the bridge axis direction. The bottom plate 21 and the standing wall 22
A recess 23 is formed along the bridge axis direction.

Reference numeral 24 denotes a sliding plate made of, for example, a non-corrosive metal plate, which comes into sliding contact with the sliding plate 16 of the upper shoe 10. The sliding plates 24 are fixed to opposing surfaces of the lower shoe standing wall 22, respectively.

Reference numerals 25 and 26 denote side plates disposed on both side surfaces of the upper shoe 10 in the bridge axis direction, and the side plates 25 and 26 have long axes in the direction perpendicular to the bridge axis at positions that match the bolt holes 27 of the intermediate plate 12. A circular bolt hole 30 is provided at a position that matches the circular bolt hole 28 and the bolt hole 29 of the upper shoe 10.

The side plates 25 and 26 connect the intermediate plate 12 disposed in the groove 11 of the upper shoe 10 and the upper shoe 10 with respective bolts 2.
7.2B, 29.30 with bolts 31, 32. By aligning and fixing the intermediate plate 12, the intermediate plate 12 is moved in the bridge axis direction together with the upper shoe 10.

In the wind bearing of the present invention, an intermediate plate 12 is fitted into the groove 11 of the upper shoe 10 via adjustment wedge plates 18 and 19, and a rubber plate 14 is fitted into the circular recess 13 of the intermediate plate 12.
After fitting the sliding plate 16 onto the rubber plate 14 and fitting the seal ring 17 surrounding the circular recess 13, the upper shoe 10 is inserted into the recess 23 of the lower shoe 20, and the sliding plate 16 of the upper shoe 10 is inserted into the recess 23 of the lower shoe 20. The plate 16 and the sliding plate 24 arranged on the vertical wall 22 of the lower shoe 20 are loaded so that they face each other, and then the sliding plate 16 and the sliding plate 24
After adjustment, the intermediate plate 12 and the upper shoe 10 are attached to the side plates 25, 26.
It is assembled by fixing with bolts 31 and 32 through the .

The present invention has the above-described configuration, and since the sliding contact state between the sliding plate and the sliding contact plate can be adjusted using the adjustment wedge plate, there is no possibility of damaging the main bearing and the bridge girder between the sliding plate and the sliding contact plate. This prevents the occurrence of gaps or pressure-welding conditions.
Furthermore, it is possible to reliably support lateral forces caused by wind or rotation of the tower column, and to prevent lateral forces from acting on the main support.

Furthermore, since the sliding contact between the sliding plate and the sliding contact plate is surface contact, wear and frictional resistance can be lowered compared to conventional line contact, and a good sliding contact state can be obtained.

[Brief explanation of the drawings] Figure 1 is a general view of a cable-stayed bridge, Figure 2 is a Y-Y sectional view of Figure 1, Figure 3 is a longitudinal sectional front view of a conventional window support, and Figure 4 is a main view of a cable-stayed bridge. FIG. 5 is a front view of the window bearing according to the invention, and FIG. 6 is an exploded perspective view of the window bearing according to the invention. 10: Upper shoe, 12: Intermediate plate, 14: Rubber plate, 15: Compression ring, 16: Sliding plate, 17: Seal ring, 18, 19: Adjustment wedge plate, 20: Lower shoe, 24: Sliding plate, 25 , 26: Side plate.

Claims (1)

[Scope of utility model registration request] The upper shoe, which is attached to a superstructure such as a bridge girder, has grooves extending along the bridge axis on both sides of the shoe in the direction perpendicular to the bridge axis, and a set of adjustment wedge plates are installed in the grooves. Intermediate plates having four circular parts are disposed through the intermediate plates, and slide plates are disposed in the circular recesses of the intermediate plates through rubber plates. is composed of a bottom plate and a standing wall integrally facing the bottom plate at a predetermined interval in the direction perpendicular to the bridge axis and formed along the bridge axis direction, and the bottom shoe is provided with the bottom plate and the standing wall. A recess is formed along the bridge axis direction, and sliding contact plates are fixed to opposing surfaces of the vertical walls of the lower shoe, and the upper shoe is attached to the recess of the lower shoe. A wind bearing made of a sliding plate that is inserted into sliding contact with a sliding plate on the standing wall of the lower shoe.