JPH0428882Y2 - - Google Patents

Description

[Detailed explanation of the idea] "Industrial application field" The present invention relates to rails for railways.

``Conventional technology'' Normally, the standard length of railway rail is approximately 25 m, and the longer the rail, the fewer the number of joints, which reduces train movement and noise.In particular, maintenance and inspection of track joints becomes easier. However, the rail is limited to a certain length because it is inconvenient to store the rail and handle it during transportation.

Therefore, a long railway rail is formed by connecting a number of standard rails 28. When connecting rails, the end surfaces of the rails 28, 28' are brought close to each other, joint plates are placed on both sides of the rails, and bolts and nuts are tightened, but expansion and contraction of the rails due to changes in outside temperature must be adjusted. Therefore, a clearance 29 is provided between the rails (Fig. 5).

Therefore, when the wheels of a train pass through this gap, impact noise is generated at the joint, and this impact noise contributes to noise pollution, making it uncomfortable for passengers to ride in the vehicle due to the impact noise. In addition, the end of the rail is likely to crack or break due to the impact when passing through the joint, which is dangerous.

Therefore, in order to prevent the generation of impact noise due to the gaps in the rails, long rails with few joints are also used. This long rail is made by welding several regular rails to form a long rail, but since it is impossible to form one rail infinitely, it is made by connecting them at regular intervals. be.

When connecting long rails, in order to reduce impact noise when passing through a joint, short connecting rails 3 are installed at each end of the long rails, as shown in Figure 6.
1 and 35 are connected to connect the long rails.

``Problems to be solved by the invention'' Connecting long rails requires three types of rails: the original long rail and male and female end rails to connect the long rails to each other, which requires a large number of parts. The cost becomes high. That is, as shown in FIG. 7, in order to eliminate play in the joint of the rails and to adjust the expansion and contraction of the rail, an outer relief part 32 is formed by bending the tip of the outer end rail 31 connected to one rail outward; The tip of the inner end rail 35 connected to the other opposing rail is thinned to form a blade-shaped portion 36,
The ends of the rails 31 and 35 are connected together.

Furthermore, when the rails 31 and 35 are connected, a wasteful portion is created on the outer end rail 31 as shown by the dashed line Y in FIG. 7, which is very uneconomical.

``Means for Solving the Problems'' The present invention was made in view of such conventional drawbacks, and a head for wheel guidance is integrated into the upper part of the support part formed by establishing the center of the base part in the longitudinal direction. to form a rail body, both end surfaces of the rail body are longitudinally cut in the same direction at the same angle to form a slanted end surface, and the tip of the head of the slanted end surface is cut out to form a curved notch. The notch provided at the head end of the slanted slope of one rail body is located on the inside, and the head end of the slanted slope of the other rail body is placed outside, facing the slanted slope. In order to solve the above-mentioned problem, a configuration in which the slanted slopes are connected to each other in surface contact facing each other is used as a means for solving the above problem.

"Function" At both ends of one type of rail body with the same shape,
Slanted slopes formed longitudinally with the same aroma at the same angle are joined to each other, and the head tips of the sloped end surfaces are curved to provide a notch, and the rail bodies are brought into close contact with each other and connected. This eliminates play and reduces impact noise when the wheels pass, and by locating the notch at the tip of the head of the slanted end face inside the paired rail bodies, thermal expansion is reduced. This prevents the head of the oblique end surface from protruding toward the side surface of the rail body due to expansion and contraction.

``Example'' An example of the present invention will be described based on FIGS. 1 to 4. Reference numeral 21 is a rail body, and a head for guiding the wheels is attached to the upper part of a support part 23 established in the center of a platform-shaped base part 22. The portion 24 is integrally formed to have an I-shaped cross section with left and right symmetry. Both end faces in the longitudinal direction of the rail main body 21 are longitudinally cut in the same direction at the same angle to form oblique end faces 25, 25'.

A notch 26 is provided at the tip of the head of this slanted end surface to adjust the expansion and contraction of the rail body 21 due to temperature changes. Reference numeral 27 denotes a plurality of bolt holes provided at both end portions of the support portion 23 of the rail body 21. Reference numeral 8 denotes a joint plate which is brought into contact with both side surfaces of the end portion of the support portion 23, and has a plurality of holes for inserting the bolts 10 therethrough. 12 is a sleeper.

The operation of the embodiment will be explained below. When the rail bodies 21 and 21' are connected to each other, the third
As shown in the figure, the rail bodies 21 are connected to each other,
21' is the oblique end surface 25 of one rail main body 21.
The notch provided at the tip of the head of the rail body 21' is located inside, and the oblique end surface 25' of the other rail body 21' is located symmetrically in a V-shape. That is, the slanted slopes of each other are brought into surface contact with each other so that the notches are located inside, and the joint plates 8 are aligned with both sides of the support part 23 of the connecting part and are tightened with bolts and nuts 10, so that the rail Since there is no clearance between the rail and the train, no impact noise is generated by the wheels when the train passes, allowing the train to pass smoothly.

Even if the rail body 21 stretches due to temperature changes,
As shown in FIG. 2, the head tip 24 of the oblique end surface 25
and the other rail main body 21'.
There is a space X between the oblique end surface 25' and the head rear end 24'.
, the elongation of the notch 26 at the head end 24 of the rail main body 21 is absorbed by the space X, and the end of the notch 26 does not protrude inward on the head side of the rail main body 21'. Because there are no rails, train wheels will not hit the tracks and the rails will not be damaged, making it safer.

"Effect of ideas" The present invention has the following effects.

A notch is provided at the tip of the head of the slanted end face provided at both ends of the rail, and the notch is located inside so that the slanted slopes are connected by making surface contact with each other, so the rail expands due to thermal expansion. When this occurs, the tip of each rail body does not protrude from the side surface of the rail body, so the train's wheels do not hit and damage the rail, making it safe.

There is no need to provide a gap at the joint between the rails, and since the slanted slopes are in surface contact with each other and the notch is located inside to connect them, there is no impact noise when passing through the joint, which prevents noise pollution. I can do it.

Since only one type of rail body of the same shape is required, manufacturing costs can be reduced due to mass production effects.

[Brief explanation of drawings]

Figure 1 is a plan view of the rail body, Figure 2 is a side view of the main parts with the joints of the rail separated from each other, and Figure 3 is a plan view of the rail body.
The figure is a plan view showing the connecting part of the rail main body.
The figure is an inside side view of the connecting part of the rail main body, 5th
7 are plan views showing conventional rail connection states. 21, 21'...Rail body, 22...Foundation part,
23...Support part, 25, 25'...Slanted end surface, 2
6...Notch.

Claims (1)

[Scope of utility model registration request] A head for wheel guidance is integrally provided on the upper part of a support part formed by extending the center of the base part in the longitudinal direction to form a rail body, and both end surfaces of this rail body are longitudinally cut in the same direction at the same angle to each other. to form a slanted end surface, the head tip of the slanted end surface is cut out to provide a curved notch, and the notch provided at the head tip of the slanted slope of one rail body is located inside. , a railway rail characterized in that the head tip of the slanted slope of the other rail main body is disposed outside so as to face the slanted slope, and the slanted slopes are connected to each other in surface contact with each other facing each other. .