JPH0455042Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a device for fastening the lower structure of a track expansion joint, that is, a floor plate equipped with an expansion joint, onto a PC sleeper, in which it is placed on the PC sleeper via a pad. By pressing both ends of the floorboard with leaf springs and inserting a wedge-shaped spring holder behind the leaf spring, it is possible to achieve double elastic fastening in the vertical direction, and also to have an elastic effect in the lateral pressure direction. This allows for gauge adjustment.

(Conventional technology) In recent years, tracks have been developed to improve the ride comfort of trains.
As the number of rail joints is reduced and the number of long rails is increased by welding, track expansion joints absorb the expansion and contraction of the rail due to changes in temperature and prevent meandering deformation of the track. It is often used at the end of the rail due to insulation or curve radius, but in order to have the function of absorbing expansion and contraction, it is used to maintain a small gap between the washer and rail brace rigidly fastened to the floorboard. Since the rail is structured to be able to slide in the axial direction only within the limits, it can be said that the superstructure is equivalent to rigid fastening.

(Problems to be solved by the invention) In general, rigid fastening of the sleepers, rail fastening devices, rails, etc. that make up the track causes wave-like wear on the rail tread, so it is necessary to use elastic fastening for the rail fastening devices. It has been found that corrugated wear can be prevented by In recent years, in general track areas, there has been a shift from wooden sleepers to PC sleepers, which have a longer lifespan. However, when using PC sleepers, which have no elasticity compared to wooden sleepers, pads and plates inevitably occur. Double elastic fastening devices using springs are used, but some expansion joints for track expansion joints have been developed with the aim of converting them into PC sleepers, but elastic fastening devices for PC sleepers in general track sections There is no device that has the same functionality as this device, and wooden sleeper type devices are still used. This idea is for the general track section at the track expansion joint.
The present invention provides a fastening device that has the same function as an elastic fastening device for PC sleepers.

(Means for solving the problem) The present invention will be explained below based on the drawings. 1.
This is a PC sleeper, and the depression upper surface 1a formed on the upper surface side of the PC sleeper 1 has a certain slope (usually 1:40) in the gauge direction, and the rising parts 1b at both ends are in the rail axis direction as shown in Figure 2. Formed with a certain slope. 3 is the concave top surface 1 of PC sleeper 1
This is a floorboard placed on the center part of A with a pad 2 interposed therebetween. Reference numerals 3a and 3a are holding surfaces formed by recessing a portion of the floor plate 3 at both left and right end positions to a size that allows the tips of the leaf springs to be inserted therein. 4, 4 is a vertical section approximately collapsed U
The upper tip 4a and the lower tip 4c of the plate spring 4 are brought into contact with the pressing surface 3a, and the plate spring 4 is
Screw the bolts 5 into the plugs 7, 7 attached to the PC sleeper 1 and tighten them. 6,
Reference numeral 6 designates a wedge-shaped spring holder having a support curved surface 8 formed on the inner surface to be approximately the same curved surface as the curved surface 4b on the back side of the leaf spring 4; The rising portion 1 in a state where it is received more
b, and by tightening the bolt 5, the plate spring 4 is pressed downward and tightened.

(Effects) As mentioned above, the fastening device of the present invention solves the problem that the rail legs cannot be directly elastically fastened due to the structurally fatal defect of the track expansion joint, and is elastically fastened in the lower structure. By making this possible, we succeeded in producing an effect equivalent to that of other general track fastening devices that have a structure in which rail legs are directly fastened with double elasticity. That is, in the vertical direction, the pad 2 and the leaf springs 4, 4 produce a double elastic effect, and in the lateral pressure direction, the lower tips 4c, 4c of the leaf springs support the ends 3a, 3a of the floorboard, and the wedge-shaped springs The lateral pressure is transmitted to the PC sleeper 1 via the pedestals 6, 6, and an elastic effect is also produced in the lateral pressure direction by the spring action of the lower part of the leaf spring. or,
In addition, the left and right gauges can be adjusted by adjusting the degree of insertion of the wedge-shaped spring holders 6, 6 at both ends of the recessed upper surface 1a in the rail axis direction. Furthermore, when using expansion joints on curved sections of the track, slack may be added to the gauge dimension depending on the line radius, but by using the fastening device of the present invention, it is possible to adjust the gauge to match the amount of slack added. This is an idea that has the effect of eliminating the need to create a special product for curved surfaces.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a fastening device for a track expansion joint to a PC sleeper according to the present invention. Figure 2 is
FIG. 3 is a plan view showing a state in which a floorboard is placed on the top surface of a recess of a PC sleeper. FIG. 3 is a perspective view of the wedge-shaped spring holder. 1...PC sleeper, 1a...Top surface of depression, 1b
... Rising part, 2 ... Padded, 3 ... Floor board, 3a
...Press surface, 4...Plate spring, 4a...Top tip,
4b... Curved surface on the back side, 4c... Lower tip, 5...
...Bolt, 6...Wedge-shaped spring holder, 7...Embedded plug, 8...Support curved surface.

Claims (1)

[Scope of utility model registration request] In a device for fastening a floorboard to a PC sleeper equipped with a track expansion joint, a floorboard 3 is placed in the center of the recessed upper surface 1a of the PC sleeper 1 via a pad 2, and the rising portions 1b at both left and right ends of the recessed upper surface 1a are installed. ,1
Wedge-shaped spring holders 6, 6 are placed on b, and the lower tips 4c, 4c of the leaf springs 4 are placed on the holding surfaces 3a, 3a formed at the ends of the floorboard 3, and the wedge-shaped spring holders 6, 6 are Place the curved surfaces 4b, 4b on the back side of the leaf spring 4 on the support curved surface 8 of
is pressed downward, and the upper tips 4a, 4a of the leaf spring 4 are pressed downward.
A device for fastening a track expansion joint to a PC sleeper, characterized in that the floor board 3 is fastened onto the PC sleeper 1 by pressing the holding surfaces 3a, 3a of the floor board 3.