JPH08134805A - Vibration isolator for track - Google Patents

Abstract

PURPOSE: To ensure the safety of a track by facilitating the adjustment of height by the sinking of an elastic body and also maintaining and exchanging the elastic body easily. CONSTITUTION: In a vibration isolator for a track elastically bearing a floating slab 2 supporting a rail in an upper section through a rail connector on a rigid subbase course 1, a plurality of vertically penetrated holes 3 are formed to the floating slab 2. Arm beams 7 are fixed onto the inwalls of these each hole 3 extending over the radial direction, and adjusting bolts 10 movable along the axial directions of the holes 3 are mounted on the arm beams 7. Upper brackets 13 are fixed at the lower ends of the adjusting bolts 10 so as not to prevent the revolution of the adjusting bolts 10, and elastic bodies 15 are installed among the upper brackets 13 and lower brackets 14 fastened onto the rigid subbase course 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antivibration device for a track which elastically supports a floating slab which supports a rail on a rigid roadbed through a rail connecting device.

[0002]

2. Description of the Related Art As a vibration isolator of this type, Japanese Unexamined Patent Publication No. 57-57
The one described in Japanese Patent No. 24701 is known. This is to support a rail on a flat plate-shaped or frame-shaped precast intermediate member (floating slab) through a rail connecting device, and partially support the lower part of the precast intermediate member with an elastic material, so that it is on a rigid roadbed It is a direct connection. Adhesive elastic material consisting of elastic rubber mat or room temperature curing type polyurethane resin as the main component, or Styrofoam foam and adding material containing iron oxide as the main component, etc. at a predetermined position under the floating slab The floating slab is supported through this elastic material and is directly connected to the rigid roadbed such as viaducts, bridges and tunnels.

[0003]

The conventional elastic material sinks due to the weight of the floating slab, and further sinks due to long-term use. It is necessary to adjust the height to a predetermined level in order to ensure track safety and maintain vibration isolation performance. In order to adjust the height, the floating slab had to be lifted with a crane or the like and the elastic material had to be replaced, which required extremely troublesome and difficult work.

Therefore, an object of the present invention is to provide an anti-vibration device for a track, which facilitates height adjustment by sinking of the elastic member, facilitates maintenance and replacement of the elastic member, and ensures the safety of the track. And

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a track for elastically supporting a floating slab that supports a rail on a rigid roadbed by way of a rail connecting device. In the anti-vibration device, a plurality of vertically penetrating holes are formed in the floating slab, and arm beams are fixed to the inner wall of each of these holes in the radial direction, and the arm beams can be moved along the axial direction of the holes. A simple adjustment bolt is attached, an upper bracket is fixed to the lower end of this adjustment bolt so as not to prevent rotation of the adjustment bolt, and an elastic body is provided between this upper bracket and the lower bracket fixed to the rigid roadbed. Is.

[0006]

[Operation] When the elastic body sinks and the height of the floating slab falls below a predetermined height, that is, when the rail sinks, the height of the floating slab can be adjusted by adjusting bolts, so work is easy. Becomes Further, maintenance and replacement of the elastic body can be easily performed through the holes of the floating slab.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

The cross-sectional view shown in FIG. 1 is a cross-section taken along the line AA of FIG. 3, and supports a rail (not shown) on the upper part of the rigid roadbed 1 via a rail connecting device (not shown). 3 shows a vibration damping device for a track that elastically supports the floating slab 2. A plurality of vertically penetrating holes 3 are formed in the floating slab 2, and a hollow cylindrical insert fitting 4 having a flange 4A having one end bent outward is attached to each of the holes 3 by a stud bolt 5. The flange 4A of the insert fitting 4 is attached to the lower surface of the floating slab 2. Further, ribs 4B are provided and embedded in the floating slab 2. A boss 6 is formed on the inner peripheral surface of the insert fitting 4, and an arm beam 7 is fixed to the boss 5. The arm beam 7 has a cross shape and extends over the hole 3 in the radial direction.
The arm beam 7 is attached by fitting the arm portion of the book into the recess of the boss 6 and inserting the pin 8 into the boss 6 and the arm portion of the arm beam 7. Insert metal fitting 4
A stop bar 9 is formed below the position where the boss 6 is formed. When the insert fitting 4 is formed in a square pole, four stop bars 9 are provided at the corners. An adjusting bolt 10 movable along the axial direction of the hole 3 is attached to the arm beam 7, and a lower end of the adjusting bolt 10 is fixed to a pedestal 12 via a leveling pad 11. The lower end of the adjusting bolt 10 is rotatable with respect to the base 12. The pedestal 12 is fixed to the upper bracket 13, and the upper bracket 1
An elastic body 15 is provided between the lower bracket 14 and the lower bracket 14 fixed onto the rigid roadbed 1. The lower bracket 14 is formed in a hollow cylindrical shape having a bottom with an upper surface opening, and the upper bracket 13 is fitted into the hollow cylindrical portion to form the upper bracket 1.
A ring-shaped elastic body 16 is provided between the outer peripheral surface of the hollow shell 3 and the inner peripheral surface of the hollow cylindrical portion of the lower bracket 14. As the elastic body 15, a laminated rubber in which a metal plate 15B is sandwiched between two rubbers 15A is used. A packing 17 is provided on the outer peripheral edge of the bottom of the lower bracket 14. A resin 18 is filled in the space surrounded by the packing 17. This filling method will be described later. A lock nut 19 is provided on the upper end side of the adjusting bolt 10. The pedestal 12 is fixed to the upper bracket 13 with bolts 20. A stopper plate 21 is provided in the gap between the pedestal 12 and the stop bar 9, and the stopper plate 21 is fixed to the pedestal 12 with a bolt 22.

FIG. 2 is a sectional view taken along the line BB in FIG. 3, showing the details of the injection port 23 of the resin 18 and the attachment points of the stopper plate 21. Further, the pedestal 12 and the lower bracket 14 are temporarily fixed by the temporary fixing bolt 24 until after the resin 18 is injected.

FIG. 3 is a plan view of the entire vibration isolator with the floating slab 2 removed, showing the shape of the cross-shaped arm beam 7 and a plurality of extending portions 12A extending in the pedestal 12 in the radial direction of the hole 3. (4 pieces) are formed, and the state where the stop bar 9 is provided in the hole 3 in the extension direction of these extending portions 12A is shown. The stopper plate 21 is provided between the stop bar 9 and the extending portion 12A. The stopper plate 21 provided between the extending portion 12A and the stop bar 9 has an L shape, and a portion inserted between the stopper plate 21 has a wedge shape.
When the stopper plate 21 is provided between the extending portion 12A and the stop bar 9 as described above, the floating slab 2 and the vibration isolator are firmly integrated.

[0011]

As described above, according to the present invention, a plurality of vertically penetrating holes are formed in the floating slab, and the arm beam is fixed to the inner wall of each hole in the radial direction. Attach an adjusting bolt that can move along the axial direction of the hole to the arm beam, fix the upper bracket to the lower end of this adjusting bolt, and attach an elastic body between this upper bracket and the lower bracket fixed on the rigid roadbed. Since the elastic slab is provided, the height of the floating slab can be easily adjusted by adjusting the adjusting bolt even if the elastic body sinks. Further, maintenance and replacement of the elastic body can be easily performed from above the hole, and the work is facilitated. Since the height of the floating slab can be easily adjusted, the safety of the track can be ensured.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line AA of FIG.

FIG. 2 is a sectional view taken along line BB of FIG.

FIG. 3 is a plan view of a state in which a floating slab is removed.

[Explanation of symbols]

 1 Rigid roadbed 2 Floating slab 3 Hole 7 Arm beam 10 Adjust bolt 13 Upper bracket 14 Lower bracket 15 Elastic body

Claims (3)

[Claims] 1. An anti-vibration device for a track, which elastically supports a floating slab that supports a rail via a rail connecting device on a rigid roadbed, wherein a plurality of vertically penetrating holes are formed in the floating slab. , An arm beam is fixed to the inner wall of each of these holes in the radial direction, an adjust bolt that is movable along the axial direction of the hole is attached to this arm beam, and an upper bracket is attached to the lower end of this adjust bolt. A vibration isolator for a track, which is fixed so as not to block rotation, and an elastic body is provided between the upper bracket and a lower bracket fixed to a rigid roadbed. 2. A lower bracket is formed into a bottomed hollow cylindrical shape having an upper surface opening, an upper bracket is fitted into the hollow cylindrical portion, and a ring-shaped elastic body is provided between an outer peripheral surface of the upper bracket and an inner peripheral surface of the hollow cylindrical portion. The anti-vibration device for a track according to claim 1, which is provided. 3. The lower end of the adjustment bolt is fixed to a pedestal fixed to an upper bracket, a plurality of extending portions extending in the radial direction of the hole are formed in the pedestal, and a stop is formed in the extending direction of the extending portions. The anti-vibration device for a track according to claim 1 or 2, wherein a bar is fixedly provided, and a stopper plate is provided between the stop bar and the extending portion.