Railway Rail Fastening Clip And Pad For Recessed Railseats
Abstract:
A resilient railway rail fastening clip (3) has successive first to seventh portions (31 to 37) where when the clip (3) is in a non operative configuration the first and seventh portions (31, 37) of the clip (3) form leg portions which lie in a first plane (P) the second and sixth portions extend substantially away from and above the first plane (P) at least parts of the third and fifth portions (33, 35) extend towards and above the first plane (P) such that the longitudinal axes of the third and fifth portions (33, 35) lie substantially in a second plane (R) different from the said first plane (P) which second plane (R) intersects the first plane (P) at a first acute angle alpha and the fourth portion (34) extends substantially in or below the said first plane (P) such that the longitudinal axis of the fourth portion (34) lies substantially in a third plane (Q) which is different to the said second plane (R) and intersects the said first plane (P) at a second acute angle beta where 0°
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Notices, Deadlines & Correspondence
1 Scofton Close
Gateford
Worksop Nottinghamshire S81 7SG
2. COX Stephen John
5 Selwyn Avenue
Richmond Surrey TW9 2HB
Specification
The present invention relates to a railway rail fastening
clip and railway rail pad for recessed railseats.
A recessed railseat is a transverse recess (channel) in the
5 top surface of a concrete railway sleeper for receiving the
foot of a railway rail. Respective railway rail clip
anchoring devices (shoulders) are provided on either side
of the recess for retaining resilient railway rail
fastening clips which bear on the rail foot. An example of
10 such a rail fastening clip is known from GB1510224, which
is a clip of the type which is driven onto the rail foot in
a direction parallel to the longitudinal axis of the rail.
Railway rail fastening clips are known, for example from
15 EP0619852A as shown in Figure 1A and EP1987201A as shown in
Figure lB, which are designed to be driven onto a rail foot
laterally with respect to the longitudinal axis of the
rail. One advantage of such clips is that they can be
driven more readily by automatic machinery. One type of
20 automatic clip driving machinery has paddles which are set
at a certain height such that as they sweep they come into
contact with the rear arches (heel) of the clip but do not
touch the sleeper surface or any part of the anchoring
device.
25
It is desirable to provide a railway rail fastening clip of
a type which can be driven laterally by the afore-mentioned
type of automatic clip driving machinery onto a railway
rail seated in a recessed railseat.
30
According to an embodiment of a first aspect of the present
invention there is provided a resilient railway rail
fastening clip for fastening a railway rail to an
underlying foundation, the clip being such that it can be
deflected from a non-operative configuration to at least
one operative configuration in which a toe portion of the
clip bears on a railway rail, the clip being made from a
5 rod of resilient material shaped so as to have, proceeding
from one end of the rod to the other end of the rod,
firstly a substantially straight first portion, then a
substantially bent second portion, then a third portion,
then a fourth portion which is substantially U-shaped and
10 forms the toe portion of the clip, then a fifth portion,
then a substantially bent sixth portion, and finally a
substantially straight seventh portion, the first and
seventh portions of the clip forming leg portions, the
longitudinal axes of which lie substantially in a first
15 plane when the clip is in its non-operative configuration
and, when the clip is viewed in a direction perpendicular
to the said first plane, the third and fifth portions
appear to lie between the first and seventh portions,
wherein, when the clip is in its non-operative
20 configuration, the second and sixth portions extend
substantially away from and above the first plane and at
least parts of the third and fifth portions extend towards
and above the first plane such that the longitudinal axes
of the third and fifth portions lie substantially in a
25 second plane, different from the said first plane, which
second plane intersects the first plane at a first acute
angle a, and the fourth portion extends substantially in or
below the said first plane such that the longitudinal axis
of the fourth portion lies substantially in a third plane
30 which is different to the said second plane and intersects
the said first plane at a second acute angle P, where
oO1pp.
25 An increase in angle oc is desirably accompanied by a
proportionate decrease in the angle P . For example, when oc
is around 45O, P may be around 0'. In the case that P is
oO, the third plane Q lies in the first plane P, such that
the first and third planes, P and Q, are the same, or, if
30 the third and fifth portions 33, 35 extend partially
through the first plane P, the third plane Q is a plane
lying parallel to but below the first plane P.
Detents are provided in upper surfaces of the clip legs 31,
37, adjacent to the ends El, E2, for engaging with
corresponding projections on an anchoring device, whereby
the clip can be held in a pre-assembly position in which it
5 is retained by the anchoring device but does not bear on
the rail. At the ends El, E2, a chamfer is provided for
assisting the driving of the clip into an anchoring device.
Figures 3A to 3C show a rail pad 4 with integral sideposts
10 for use in a recessed railseat, in which projections from
the sideposts can overlap the surface of the sleeper
adjacent to the recess to resist ingress of water and
debris. The pad is suitable for use with a resilient rail
fastening clip, such as that of Figure 2, which is
15 configured to be driven onto and off the rail foot in a
lateral direction with respect to the longitudinal axis of
the rail. Rail pad 4 has a major face 41 providing a rail
seat portion 42 on which the foot of the railway rail sits
when the rail pad 4 is in use. The rail seat portion has
20 opposite side edges 43 to at least part of each of which an
upstanding portion 44 of the pad is connected. Each
upstanding portion 44 is connected to the railseat portion
42 along the entire length of the upstanding portion 44 and
extends upwardly therefrom. That is, all parts of the pad
25 4 connected to the railseat portion 42 extend substantially
perpendicular thereto. Unlike the prior art pads, no part
of the pad 4 is connected to the railseat portion 42 so as
to extend laterally therefrom. Instead, each upstanding
portion 44 is connected to at two projections 45A; 45B of
30 the pad 4 each of which extends laterally from the
upstanding portion 44 such that it is vertically spaced
from, and does not overhang (i.e. extends away from), the
rail seat portion 42. The projections 45A, 45B extend from
upper edges of the upstanding portions 44. The projections
45A, 45B are spaced apart along the length of the
upstanding portion 44 and extend along only part of the
length of the upstanding portion 44 at a location along the
5 length of the upstanding portion 44 which is spaced from
ends 44a thereof. In this embodiment the projections 45A,
45B are centrally located with respect to the ends 44a of
the upstanding portions 44.
10 The rail pad further comprises cover portions 46A, 46B, 46C
connected to, and extending laterally from, each upstanding
portion 44 at locations along its length such that the
upstanding portion 44 is connected along its entire length
to either a projection 45A, 45B or a cover portion 46A,
15 46B, 46C. The projections 45A and 45B and the cover portion
46B which adjoins them could be regarded as forming a
single projection. Cover portions 46A, 46C are provided
'with a notch 46A1, 46C1 for receiving part of a railway
rail anchoring device 5.
2 0
In an alternative embodiment (not shown), . instead of the
notches 46A1, 46Ct, gaps are provided between the cover
portions 46A, 46C and the projections 45A, 45B located
immediately adjacent thereto for receiving part of a
25 railway rail anchoring device, in order to accommodate an
anchoring device having parts which extend up to the edge
of the recess.
In the embodiment shown, upper surfaces 451A, 451B of the
30 projections 45A, 45B are higher with respect to the rail
seat portion 42 than upper surfaces 461A, 461B, 461C of the
cover portions 46A, 46B, 46C, such that there is more
material, and hence strength, in the projections 45A, 45B.
Figure 4 shows apparatus comprising a rail pad 4 as shown
in Figures 3A to 3C and a railway rail foundation 1 having
an upper surface 1A formed with a recess 10 providing a
5 seat for a railway rail 2 (see Figure 5). The rail pad 4 is
located within the recess 10 such that the upstanding
portions 44 of the pad 4 abut respective walls of the
recess 10 and extend to the height of the walls of the
recess 10. The projections 45A, 45B of the upstanding
10 .portions 44 extend over part of the upper surface 1A of the
rail foundation 1. Lower surfaces of the cover portions
46A to 46C contact the upper surface 1A of the sleeper 1 so
as to provide a seal against the ingress of water and/or
debris. In this embodiment, respective railway rail clip
15 anchoring devices 5 are attached to the rail foundation 1
on opposite sides of the recess 4 such that front parts 50
of the anchoring devices 5 are spaced from edges of the
recess 10 (although as mentioned above in an alternative
embodiment the front parts 50 may extend up to the edge of
20 the recess 10). The front part 50 of each anchoring device
5 has an opening 51, and the projections 45A, 45B of the
rail pad 4 project into the openings 51, such that contact
between the projections 45A, 45B and internal surfaces of
the opening resists longitudinal movement of the pad.
WE CLAIMS:-
1. A resilient railway rail fastening clip (3) for
fastening a railway rail to an underlying foundation, the
5 clip (3) being such that it can be deflected from a nonoperative
configuration to at least one operative
configuration in which a toe portion (34) of the clip (3)
can bear on a railway rail, the clip (3) being made from a
rod of resilient material shaped so as to have, proceeding
10 from one end El of the rod to the other end E2 of the rod,
firstly a substantially straight first portion (31), then a
substantially bent second portion (32), then a third
portion (33), then a fourth portion (34) which is
substantially U-shaped and forms the toe portion of the
15 clip, then a fifth portion (35), then a substantially bent
sixth portion (36), and finally a substantially straight
seventh portion (37), the first and seventh portions (31,
37) of the clip (3) forming leg portions, the longitudinal
axes of which lie substantially in a first plane (P) when
20 the clip (3) is in its non-operative configuration, the
third and fifth portions (33, 35) lying between the first
and seventh portions (31, 37) , wherein, when the clip (3)
is in its non-operative configuration, the second and sixth
portions extend substantially away from and above the first
25 plane (P) and at least parts of the third and fifth
portions (33, 35) extend towards and above the first plane
(P) such that the longitudinal axes of the third and fifth
portions (33, 35) lie substantially in a second plane (R),
different from the said first plane (P), which second plane
30 (R) intersects the first plane (P) at a first acute angle
a, and the fourth portion (34) extends substantially in or
below the said first plane (P) such that the longitudinal
axis of the fourth portion (34) lies substantially in a
third plane (Q) which is different to the said second plane
(R) and intersects the said first plane (P) at a second
acute angle P, where o0