Railways: surface track – Fastenings
Reexamination Certificate
2002-04-23
2004-12-14
Jules, Frantz F. (Department: 3617)
Railways: surface track
Fastenings
C238S349000
Reexamination Certificate
active
06830199
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a rail fixing clip of a railway for directly pressurizing a lower flange portion of a rail of a railway installed in a rail tie or in a concrete railway and tightly fixing to a tie or a rail support for thereby preventing an escape of a rail of a railway, and in particular to a rail fixing clip of a railway having a durability significantly enhanced in a state that more than two separated points are supported.
2. Description of the Background Art
A rail fixing clip of a railway is a formed of a curved steel used for fixing a rail of a railway. One end of the rail fixing clip is fixed to a tie or a rail support which supports the lower portion of the rail of the railway, and the other end of the same is arranged on an upper surface of the flange portion of the rail of the railway at a certain horizontal distance with respect to the one end of the same, so that a flange portion of a rail which receives a couple of force which is generated at a portion of a tie is supported by a reaction force generated in a tie (in the case of a railway which is constructed without a tie) based on an elastic transform by a weight of a train which moves along a rail between the rail supports of the railway for thereby fixing the rail to the tie.
FIG. 1
is a perspective view illustrating a rail fixing clip of a conventional railway,
FIG. 2
is a cut-away disassembled perspective view of a railway having a rail fixed by a rail fixing clip,
FIGS. 3A and 3B
are front and side views illustrating a rail fixing clip of a conventional railway, and
FIG. 4
is a cross-sectional view taken s along line
4
—
4
of FIG.
2
.
As shown in
FIG. 1
, the conventional rail fixing clip is formed in an e-shape formed by curving a single rod and includes a straight line shape hinge portion
1
a
at an one end of the same, a couple-of-force portion
1
b
arranged in parallel at one side of the hinge portion
1
a
, and a pressing portion
1
c
extended from the couple-of-force portion
1
b
, detouring the hinge portion
1
a
and arranged in parallel with respect to the hinge portion
1
a
at a portion opposite to the couple-of-force portion
1
b.
As shown in
FIG. 2
, in the conventional rail fixing clip
1
of the railway, the hinge portion
1
a
is inserted into a fixing hole
3
a
of the clip fixing plate
3
(herein after called as a plate) embedded in the tie
2
and is fixed to the plate
3
in such a manner that the pressing portion
1
c
is mounted on the flange portion
5
a
of the rail
5
, and the opposite couple-of-force portion
1
b
is formed on the plate
3
.
In the conventional rail fixing clip
1
of the railway, the plate
3
offsets the couple of force based on a reaction force R
1
of a vertical direction applied with respect to the upper portion of the hinge portion
1
a
on an upper portion of the fixing hole
3
a
and a reaction force R
2
of the vertical upper portion applied with respect to the lower portion of the couple of force
1
b
through the pressing portion
1
c
of
FIG. 2
with respect to the flange portion
5
a
of the rail
5
which receives a couple of force based on the vertical weight of the train between two ties
2
for thereby maintaining a parallel state of the force and moment, so that the rail
5
is fixed to the tie
1
or the rail support. Namely, the couple of force which is generated in a tie due to a vertical weight of the train which moves between two ties (or rail supports) in a direction that the rail is separated is applied in a vertical upper direction with respect to the lower portion of the pressing portion
1
c
of the pressing clip
1
, and a moment MF
1
about a connection portion (portion A of
FIG. 1
) between the pressing portion
1
c
and the couple-of-force portion
1
b
as shown in
FIG. 3
a
and a moment MF
2
about the hinge portion
1
a
as shown in
FIG. 3B
are generated. As shown in
FIGS. 3A and 3B
, the to conventional rail fixing clip
1
has a reaction force R
1
of the plate
3
applied in a vertical direction in the portion above the hinge portion
1
a
, and the tie
1
has a vertical upper direction reaction R
2
applied with respect to the couple of force
1
b
through the plate
3
. A resistance moment MR
1
is applied about the connection portion A between the couple-of-force portion
1
b
and the pressing portion
1
c
based on the reaction force R
1
, and a resistance moment MR
2
is applied about the connection portion A between the couple-of-force portion
1
b
and the pressing portion
1
c
, and a resistance moment MR
3
is applied about the hinge portion
1
a
for thereby maintaining a parallel state between the force and moment, so that the rail
5
is not separated. The forces applied to each portion of the fixing clip are actually applied as a distribution weight. In the above operation, it is assumed that the forces are a concentration weight applied to the centers of each portion.
The parallel states of the force and moment between the conventional rail fixing clip and the rail flange may be expressed as follows.
F=R
1
+R
2
MF
1
=
MR
1
+
MR
2
MF
2
=MR
3
However, in the conventional rail fixing clip, since a torsion stress is concentrated at a connection portion A between the pressing portion
1
c
and the couple-of-force portion
1
b
to which an axial moment MF
1
and a horizontal direction moment MF
2
are applied in maximum by the couple of force F in an axial direction from an applying point of the couple of force F or in a horizontal direction, the durability of the connection portion A is weak. Therefore, in the case that the conventional rail fixing dip is used, the fatigue stress of the connection portion of the rail fixing clip is accumulated due to a repeatedly applied impact weight of the train, and the connection portion may be damaged, so that the maintenance cost is increased. In addition, the elements of the train may be damaged due to the particles of the fixing clip which is cut and flies, so that a worker or train passenger may be damaged by the particles of the fixing clip.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a rail fixing clip of a railway capable of supporting more than two separated points with respect to a fixing implement fixed to a tie or a concrete railway for thereby decreasing a torsion stress concentration phenomenon at a certain portion and significantly enhancing a durability.
To achieve the above objects, there is provided a rail fixing clip of a railway for fixing a rail of a railway with respect to a rail support of a railway according to the present invention which includes an insertion portion including a couple-of-force portion of a straight line-shaped rod and a hinge portion extended from one end of the couple-of-force portion and arranged in parallel with respect to the couple-of-force portion above the couple-of-force portion, and a support portion including a co-working portion extended from the hinge portion at a certain horizontal distance in parallel with respect to the hinge portion and a pressing portion extended from the co-working portion and arranged in parallel with respect to the co-working portion below the co-working portion for pressing the upper surface of the flange portion of the rail of the railway.
A mounting portion is further mounted in the elongated hole in such a manner that a part of the hinge portion is sunk in the direction of the couple-of-force portion in the hinge portion.
The support portion and insertion portion are symmetric.
The support portion and insertion portion are arranged in the vertical direction.
The support portion and insertion portion has a certain slant angle in the opposite direction.
The slant angle of the support portion and the insertion portion is 45°.
The lengths of the couple-of-force portion and hinge portion are longer than the lengths of the co-working portion and the pressing portion.
To achieve the above object, there is provided a rail fixing clip of a
Jang Young Gil
Jules Frantz F.
Ladas & Parry
LandOfFree
Rail fixing clip does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rail fixing clip, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rail fixing clip will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3307080