JPS5949366B2 - Fixed bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixed support suitable for use in bridges, elevated structures, and in particular, mole rail girders.

Molrail girders generally have a narrower girder width than bridges and viaducts for roads, railways, etc., so they are suitable for supporting vertical and horizontal loads that are applied to the girder due to centrifugal force or wind loads from vehicles, etc. Since the girder itself is used as a track, it is required to have a structure that can support the upward lifting force caused by the moment, and allows easy adjustment of the vertical, longitudinal, horizontal, and horizontal positions of the girder, as well as its inclination.

In addition, in order to cope with displacements such as expansion and contraction and tilting due to temperature changes in mole rail girders as well as general road and railway bridges, fixed bearings are installed on specific piers that have a function to cope with displacements such as tilting of the girders. In addition to the fixed bearing function, the other piers are equipped with movable bearings that allow the girder to expand and contract.

The present invention provides a fixed bearing that particularly satisfies the above requirements.

That is, in a superstructure such as a bridge girder, an upper shoe with a hollow part that penetrates the bridge in a direction perpendicular to the bridge axis is buried with both ends protruding from the superstructure, and the upper shoe is buried in the upper structure. An intermediate plate is fixed to the lower surface, and the intermediate plate has a protrusion along the bridge axis and a pin provided perpendicular to the bridge axis across the protrusion, and a connecting rod is installed in the hollow part of the upper shoe. The bed has both ends protruding from the hollow part, and the lower structure such as the pier has a rectangular cutout with tapered surfaces facing each other on each side. A plate is fixed, and between the intermediate plate and the bed plate, there is a convex curved part on the upper surface, a concave groove formed in the convex curved part along the bridge axis direction, and a groove perpendicular to the bridge axis with the concave groove in between. It is provided with an engagement hole provided in the direction, and has a convex part facing each other in the bridge axis and the direction perpendicular to the bridge axis on the lower surface, and an inclined surface with the convex part sandwiched between the convex part from the bridge axis or the surface in the direction perpendicular to the bridge axis. A bearing block having tapered grooves formed in opposite directions is disposed with the groove fitting into the protrusion of the intermediate plate and the protrusion fitting into the notch of the bed plate. An adjustment piece is inserted into the tapered groove,
A locking piece is inserted between the notch and the convex part with the convex part in between, and the connecting rods are respectively connected to fixing members fixed to the lower structure. It provides support.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the figure, G is an upper structure such as a bridge girder, B is a lower structure such as a bridge pier, and C is a fixed support disposed between the upper and lower structures G and B.

Reference numeral 1 denotes an upper shoe of the fixed support C, and the upper shoe 1 is formed with a hollow portion 2 passing through it in a direction perpendicular to the bridge axis.

The upper shoe 1 is fixed to the upper structure G with an anchor bolt 3.3 so that the end in the direction perpendicular to the bridge axis protrudes from the side surface of the upper structure G in this direction, and is buried in the upper structure G. It will be done.

Reference numeral 4 denotes a cylindrical support member fitted to both ends of the hollow portion 20 of the upper shoe.

Reference numeral 5 denotes a connecting rod supported by a support member 4 fitted into the hollow part 2 of the upper shoe, and the connecting rod 5 is provided with threaded parts 6 at both ends thereof, and its length is equal to the bridge axis of the upper shoe 1. The threaded portion 6 is formed to be longer than the length of the upper shoe 1 in this direction so as to protrude from both ends in the right angle direction.

Reference numeral 7 designates an intermediate plate of the fixed support C, and the intermediate plate has a protrusion 8 along the bridge axis direction and a pin 9 sandwiching the protrusion 8 in the direction perpendicular to the bridge axis on the lower surface of the intermediate plate. Anchor Pol N
It is fixed to the superstructure G by O,,10.

Reference numeral 11 denotes a bed plate of the fixed support C. The bed plate 11 has a rectangular shape, and the central part of each side has a recess 13.12 with opposing tapered surfaces 12.12. ．． 13
are formed, and the bed plate 11 has anchor bolts 14. ．． 14 to the substructure B.

Reference numeral 15 denotes a bearing block for the fixed support C, and the bearing block 15 has a convex curved surface portion 18 and a convex curved surface portion 18 on its upper surface.
a groove 16 formed along the bridge axis direction, and a locking groove 16 formed with a diameter larger than the pin diameter of the pin 9 provided on the lower surface of the intermediate plate 7 in the direction perpendicular to the bridge axis across the groove 16. It has a matching hole 17, and a convex portion 19.19 that faces each other in the bridge axis and perpendicular directions to the bridge axis on the lower surface, and a sloped surface in opposite directions across the convex portion 19.19 from the surface on the bridge axis direction side. It has a tapered groove 20.20 formed toward.

Note that the tapered grooves 20, 20 may be formed with inclined surfaces facing in opposite directions with the convex portion interposed from the surface on the side in the direction perpendicular to the bridge axis.

The bearing block 15 is attached to the intermediate plate 7 in the groove 16.
The pins 9 of the intermediate plate 7 are fitted into the engagement holes 17, and the protrusions are fitted into the recesses 13 of the bed plate 11, thereby connecting the intermediate plate 7 and the bed plate 11. placed in between.

Reference numeral 21.21 denotes a locking piece for fixing the bearing block 15 to the bed plate 11. The locking piece 21 has a tapered surface 22.22 on one side, and the recess 13 of the bed plate 11 and the recess The tapered surface 20 is inserted between the convex portion 19 of the bearing block 15 fitted in the bearing block 13 so as to match the tapered surface 12 of the concave portion 13, and the convex portion 19 of the bearing block 15 is clamped and fixed. be.

In addition to the above-mentioned fixing function, the locking piece 21 can be used to lock the front and back of the upper structure G by adjusting the fitting state between the tapered surface 22 of the locking piece 21 and the tapered surface 12 of the recess 13 of the bed plate 11 when installing the support. It also has the function of adjusting the position in the left-right direction (the bridge axis and the direction perpendicular to the bridge axis).

Reference numeral 23.23 denotes an adjustment piece, and the adjustment piece 23.23 is provided with a convex curved taper 24 on one side, and the convex curved taper 24 is made to match the tapered surface of the tapered groove 20.20 of the bearing block. It is placed in the tapered groove 20.20 with its surface in contact with the upper surface of the bed plate 11, and adjusts the height of the bearing block 15, in other words, the height of the upper structure G.

25.25 is the holding piece 26 arranged on the upper shoe 1 and the lower structure B
This is a fixing member composed of a fixing piece 27 disposed on the holding piece 26 and a connecting piece 28 connecting the holding piece 26 and the fixing piece 27.

The holding piece 26 has a bearing material 2 on one end of which the connecting rod 5 of the upper shoe fits.
A fitting hole 30 having a diameter 9 is provided with a threaded portion 31 at the other end.

The fixing piece 27 is made of a rod-shaped body with threaded portions 32 and 32' provided at both ends, and one end of the fixed piece 27 has a convex curved surface 3 on the threaded portion 32'.
3, a washer 36 having a concave curved surface 35, and a plate-shaped washer 37 for fixing the fixing piece 27 to the lower structure B.

The connecting piece 28 is formed in a cylindrical shape with a threaded portion 38 provided on the inner surface, and the threaded portion 3 of each of the holding piece 26 and the fixing piece 27 is
1.32 and the screw portion 38 is screwed onto the screw portion 38 to connect them together.

39 is a protection tube having an opening at one end, and the protection tube 39 surrounds the fixed piece 27 and is disposed on the lower structure B with its opening flush with the upper surface of the lower structure B. This protects the fixed piece 27 within the bridge and allows movement in the bridge axis direction due to inclination.

A cover 40 is arranged around the outer periphery of the connecting piece 28 and covers the opening of the protection tube 39.

The fixed support C of the present invention fixes the bed plate 11 to the lower structure B, and inserts the adjustment piece 23.23 into the tapered groove 20.20 provided on the lower surface of the bearing block 15 on the bed plate 11, and then Part 19. ．． 19 in the recesses 13, . 13, and a locking piece 21.degree. 21 is inserted between the protrusion 19 and the recess 13 with the protrusion 19 in between.

On the bearing block 15, an intermediate plate 7 is fixed to the lower surface of the upper structure G in which the upper shoe 1 is embedded, and a protrusion 8 provided on the lower surface of the intermediate plate 7 is formed on the convex curved surface portion 18 of the upper surface of the bearing block 15. The pins 9 are fitted into the engagement holes 17 formed in the direction perpendicular to the bridge axis across the groove 16, and the lower surface of the intermediate plate is placed in contact with the convex curved surface portion 18. .

The holding piece 26 of the fixing member 25 is fitted with its fitting hole 30 into the protruding end of the connecting rod 5 which is arranged in the upper shoe hollow part 2 with both ends protruding from the hollow part, and the threaded part of the connecting rod 5 is fitted. 6 is screwed onto the nut to lock the holding piece 26 to the connecting rod 5.

Next, the tapered groove 20.2 of the bearing block 15
0 and the adjustment piece 23.2 inserted into the tapered groove 20.20
3, that is, by changing the contact position between the convex curved taper 24 of the adjustment piece 23 and the tapered groove 20, the height of the upper structure G is adjusted, and the bed plate 11 (7) recess 13 is adjusted. and the convex part 19 of the bearing block 15 fitted in the concave part 13 and the tapered surface 22 of the locking piece 21 inserted across the convex part 19 and the tapered surface 12 of the concave part 13. By changing the contact position, the position of the upper structure G in the front, rear, left and right directions is adjusted.

After adjustment, the convex part 19 of the bearing block 15 is tightly held in the concave part 13 of the bed plate 11 by the locking pieces 21, 21, and the bearing block 15 is fixed on the bed plate 11.

After that, in order to prevent the upper structure G from lifting up, the fixing piece 27 of the fixing member 25 fixed to the lower structure B and the connecting rod 5 are
A fixed support C is constructed by screwing and tightening the holding piece 26 that is locked to the connecting piece 28 .

The fixed support C configured in this manner is similar to the upper structure G when the support is installed.
The height of the upper structure G and the longitudinal and lateral directions can be easily adjusted, and the load acting on the upper structure G as well as the lifting of the upper structure G can be supported.

Displacement such as inclination of the upper structure G is limited to the extent of the gap between the pin 9 provided on the lower surface of the intermediate plate 7 and the engagement hole 17 formed in the bearing block 15 into which the pin 9 fits. 7 and the convex curved surface portion 18 of the bearing block 15, and expansion and contraction of the upper structure G is restrained by the engagement between the pin 9 and the engagement hole 17.

In addition, if the above-mentioned displacement occurs, the upper shoe 1 and the lower structure B
The fixing member 25 connected with the fixing piece 2 of the fixing member 25 is
The displacement is followed by sliding contact between the concave and convex curved surfaces of a washer 34 having a convex curved surface 33 and a washer 36 having a concave curved surface 35 disposed at one end of the convex curved surface 35 .

The present invention has the above-mentioned configuration, and has great effects such as being able to easily adjust the height and front/back/left/right position of the superstructure, supporting the load and uplift acting on the superstructure, and improving workability. It is something.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the arrangement of the fixed support, FIG. 2 is a partially longitudinal front view showing the fixed support of the present invention, and FIG.
4 is a sectional view taken along line A-A in the figure, FIG. 4 is a sectional view taken along line D-D in FIG.
The figure is a perspective view showing the shapes of the upper shoe, intermediate plate, bearing block, bed plate, adjustment piece, and locking piece of the fixed support of the present invention.

Claims (1)

[Claims] 1. In a superstructure such as a bridge girder, an upper shoe with a hollow part that penetrates the bridge in a direction perpendicular to the bridge axis is buried with both ends protruding from the superstructure. An intermediate plate is fixed to the lower surface, and the intermediate plate has a protrusion along the bridge axis direction and a pin provided perpendicular to the bridge axis across the protrusion, and a connecting rod is attached at both ends of the hollow part of the upper shoe. The lower structure such as a pier is provided with a bed plate having a rectangular shape and a notch having a tapered surface opposite to each other on each side surface. is fixed, and between the intermediate plate and the bed plate, there is a convex curved part on the upper surface, a concave groove formed in the convex curved part along the bridge axis direction, and a groove in the direction perpendicular to the bridge axis across the concave groove. It is provided with an engagement hole provided in the lower surface, and a convex portion facing each other in the direction perpendicular to the bridge axis and the bridge axis, and a sloped surface facing oppositely from the bridge axis or the surface in the direction perpendicular to the bridge axis, with the convex portion sandwiched therebetween. A bearing block having a tapered groove formed in a direction is disposed with the concave groove fitting into the protrusion of the intermediate plate, and the convex part fitting into the notch of the bed plate. An adjusting piece is inserted into the tapered groove, a locking piece is inserted between the notch and the convex part with the convex part in between, and the connecting rod is attached to a fixing member fixed to the lower structure. A fixed bearing characterized in that it is connected.