JPS5934570Y2 - Support structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an obstacle structure suitable for use in short span bridges, elevated structures, etc.

Conventionally, these structures have short spans, so the lower structures such as bridge piers have been formed in a small size, and as a result, there has been less space for installing the bearings that support the upper structures such as bridge girders. Line bearings with curved surfaces and flat upper shoes are used.

However, although this line bearing can smoothly release displacements such as expansion and contraction of the superstructure in the bridge axis direction and tilting,
It has the disadvantage that it cannot escape minute inclinations that occur in the direction perpendicular to the bridge axis.

In order to allow the above-mentioned slight inclination in the direction perpendicular to the bridge axis, the lower shoe is provided with a concave spherical surface and the concave spherical surface is a support plate having a convex spherical surface, or the lower shoe is provided with a circular recess and the circular recess is filled with rubber elastic material. This can be solved by using a support with a body and an intermediate plate, but considering the ability to support the upper structure, the so-called bearing area (bearing capacity), the shape of the lower shoe,
Due to its large dimensions, it is difficult to apply it to short-span bridges from the viewpoint of installation space for bearings.

For this reason, by providing a rectangular recess in the lower shoe and arranging the above-mentioned rectangular rubber elastic body and intermediate plate in the recess, displacement such as inclination in the direction perpendicular to the bridge axis can be smoothly released. Furthermore, the problem of installation space is solved because the reduction in bearing capacity can be prevented without enlarging the shape and dimensions, but this also leaves a complication in that a rectangular recess is formed in the lower shoe.

In view of these considerations, the present invention provides a support structure that can easily form a rectangular recess in the lower shoe.

That is, the lower shoe has a rectangular shape, and has a through hole at both ends in the direction perpendicular to the bridge axis, a groove along the bridge axis inside the through hole, and a groove located between the grooves at both ends in the bridge axis direction. and side walls along the direction perpendicular to the bridge axis are formed to face each other, and the lower shoe has a side block having a protruding strip and a bolt hole, the protruding strip fits into the lower shoe groove, A rectangular recess is formed on the upper surface of the lower shoe by the side wall and the side block, with the bolt hole aligned with the lower shoe through hole, and the recess has a rubber elastic body and a rubber elastic body upper surface. An intermediate plate with one end protruding from the side wall is housed in a tiltable manner, and a rectangular upper shoe is placed on the intermediate plate. A locking piece with a hole is arranged to align the mounting hole with a bolt hole of the side block and lock the upper shoe in the vertical direction,
The present invention provides a support structure characterized in that the lower shoe, the side block, and the locking piece are fixed to the lower structure by anchor bolts disposed through respective holes.

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

1 is a square-shaped lower shoe that is fixed to a substructure B such as a pier,
2, 2 are grooves provided opposite to each other on both ends of the upper surface of the lower shoe 1 in the direction perpendicular to the bridge axis, and are provided along the bridge axis direction; 3, 3 are grooves located between the grooves 2, 2; with the side walls 3, 3
are opposite to both ends in the bridge axis direction and are formed along the direction perpendicular to the bridge axis.

4, 4 are through holes provided at both ends in the direction perpendicular to the bridge axis, with the grooves 2, 2 facing inside.

Reference numeral 5.5 denotes a side block disposed on the lower shoe 1, and the side block 5 has a convex strip 6 on the lower surface that fits into the grooves 2, 2 of the lower shoe and passes through the upper and lower surfaces and has a A bolt hole 7 that matches the through hole 4 is formed.

The side block 5 faces both ends of the lower shoe 1 in the direction perpendicular to the bridge axis, has its side surfaces in contact with the end surface of the side wall 3.3 of the lower shoe, and has a convex upper surface protruding from the side wall. The strip portion 6 is fitted into the groove 2, and the bolt 7L7 is placed in alignment with the through hole 4.

8 is a rectangular recess formed on the upper surface of the lower shoe 1, and the recess 8 is defined by the side walls 3, 3 of the lower shoe 1 and the side blocks 5, 5 arranged on the lower shoe 1. .

9 is a rectangular rubber elastic body accommodated in the recess 8, and 10 is a compression ring fitted around one end of the rubber elastic body 9 to prevent swelling.

The rubber elastic body 9 is housed in the recess 8 of the lower shoe with the compression ring 10 facing upward and the other side in contact with the bottom surface.

11 is an intermediate plate disposed on the rubber elastic body 9; 12;
is a convex curved surface provided on the periphery of one end surface of the intermediate plate 11, and the convex curved surface 12 contacts the wall surface of the recess 8 of the lower shoe with a small gap, so that the intermediate plate 11 can tilt smoothly within the recess 8. It is meant to be.

The intermediate brakes 1 to 11 are arranged so that one end surface on the side where the convex curved surface 12 is provided is in contact with the rubber elastic body 9, and the other surface is placed on the rubber elastic body 9 so as to protrude from the concave portion 8 of the lower shoe. It is something that will be done.

Reference numeral 13 denotes a rectangular upper shoe fixed to an upper structure G such as a bridge girder, and the upper shoe 13 is disposed with its lower surface in contact with the intermediate plate 11.

14.14 is placed on the side blocks 5, 5, and the upper shoe 1
The locking piece 14 is provided with a mounting hole 15 that matches the through hole 4 of the lower shoe and the bolt hole 7 of the side block.

16.16 is the anchor bolt, 17.17 is the nut,
The anchor pole 16.16 is embedded and fixed in the lower structure B with its other end protruding from the lower structure B at which the nut 17 is disposed.

In the protruding portion, the lower shoe 1 is fitted with its through hole 4, the side block 5 is fitted with its port 1-'JL 7, and the locking piece 14 is fitted into the hole 15, respectively. By fastening these with the nut 17, the locking piece 1
4 is attached to the side block 5, and the side block 5 is attached to the lower shoe 1.
The lower shoe 1 is integrally fixed to the lower structure B.

With this structure, compared to the case where the rectangular recess 8 is integrally formed on the upper surface of the lower shoe 1 by complicated machining, the side blocks 5 are provided at both ends of the lower shoe 1 in the direction perpendicular to the bridge axis. The side block 5 and the side wall 3 of the lower shoe can be easily formed by a simple method of arranging the bridge shaft and the bridge shaft. The inclination in the direction perpendicular to the axis can be smoothly released by elastic deformation of the rubber elastic body 9 when it is pressed by the intermediate plate 11.

Here, in addition to the function of relieving inclination in the bridge axis direction and the direction perpendicular to the bridge axis, the support structure of the present invention has the function of relieving inclination in the bridge axis direction and in the direction perpendicular to the bridge axis. For example, in the intermediate plate 11 shown in FIG. 3, a fitting recess 18 as shown by the broken line is provided in the intermediate plate 11 made of a material such as a synthetic resin plate having self-lubricating properties. By fitting the sliding member, a so-called movable support, which has the function of releasing the expansion and contraction of the upper structure G by sliding the lower surface of the upper shoe 13 and the intermediate plate 11, can be formed.

In addition to the above-mentioned structure, the structure of the movable support includes the upper shoe 13.
At both ends of the bridge in the direction perpendicular to the bridge axis, for example, the upper shoe 1 shown in Fig.
3, by forming a notch 19 as indicated by the broken line in a size that allows expansion and contraction, and disposing the notch 19 in engagement with the side block 5 (in the engaged state, the notch 19 The cutout 19 forms a gap between the side block 5 and the side block 5 to allow expansion and contraction.

), the predetermined expansion and contraction of the upper structure G is relieved by sliding contact between the lower surface of the upper shoe 13 and the intermediate plate 11, and further sliding contact (movement)
It is also possible to adopt a mode in which the notch 19 and the side block 5 come into contact with each other.

Further, the intermediate plate 11 is not self-lubricating, and the above-mentioned notches 19 at both ends of the upper shoe 13 in the direction perpendicular to the bridge axis are engaged with the side blocks 5 with a small gap.
In other words, with the notch 19 engaged with the side block 5, the upper shoe 1 is adjusted so as to allow the inclination of the upper structure G.
By forming and arranging the upper shoe 3 in a size that allows it to tilt, the sliding contact between the upper shoe 13 and the intermediate plate 11 is restrained, so that the upper structure G is provided with a so-called fixed support that has the function of escaping only the tilting and restraining the expansion and contraction. It can be used as a support.

The present invention has the above-mentioned configuration, and since a rectangular recess can be easily formed in the lower shoe, the installation size in the lower structure can be reduced without reducing the bearing capacity, resulting in a structure that fits the so-called installation space. This has great effects, such as being able to smoothly release the bridge axis of the superstructure and the inclination in the direction perpendicular to the bridge axis.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal front view showing the support structure of the present invention, FIG. 2 is a partially longitudinal side view thereof, and FIG. 3 is a perspective view showing the configuration of the support structure of the present invention. 1: Lower shoe, 2... Concave groove, 3: Side wall, 4: Through hole, 5: Side block, 6: Convex strip, 7: Bolt hole, 8
: recess, 9: rubber elastic body, 11: intermediate play), 12:
Convex curved surface, 13: Upper shoe, 14: Locking piece, 15: Mounting hole,
16: Anchor bolt.

Claims (1)

[Scope of utility model registration request] The lower shoe has a rectangular shape, and has a through hole at both ends in the direction perpendicular to the bridge axis, a groove along the bridge axis inside the through hole, and a groove located between the grooves at both ends in the bridge axis direction. Side walls extending in the direction perpendicular to the axis are formed to face each other, and the lower shoe has a side block having a protruding strip and a bolt hole, the protruding strip fits into the lower shoe groove, and the bolt A rectangular recess is formed on the upper surface of the lower shoe by the side wall and the side block, with the hole aligned with the lower shoe through hole, and a rubber elastic body and a rectangular recess located on the rubber elastic body are formed in the recess. An intermediate plate with one end protruding from the side wall is housed in a tiltable manner, and a rectangular upper shoe is placed on the intermediate plate, and the side block has a hole for mounting. A locking piece with a mounting hole is arranged to match the bolt hole of the side block and locks the upper shoe in the vertical direction, and the lower shoe, side block and locking piece A support structure characterized in that it is fixed to the lower structure by anchor bolts placed through each hole.