[0001] The invention relates to a railway, tramway or the like turnout, of so-called English
type according to the preamble of claim 1.
[0002] An English type turnout of this type is known from
EP-1024988 (
WO99/020512). This document discloses an English-type turnout in which the switch stand is provided
in the form of a tie and is mounted in the railway line instead of a tie. The disclosure
of
EP 1024988 is incorporated herein. In this document, the turnout is of trailable type and has
means that alternately change it from trailable to non-trailable. All mechanical parts
for driving and locking/unlocking the switch points in the various thrown positions
(so called point locking devices), as well as other control devices are held within
the tie-like switch stand.
[0003] As explained in the disclosure of the above document and the preamble of claim 1,
the English-type turnout comprises four points and is used when two tracks cross each
other. The two tracks have one pair of rails each, which cooperate with first and
second pairs of points, one point of each of said first and second pairs of points
being located in the middle of the turnout and cooperating with one of the innermost
rails, whereas the other two points of the two pairs of points are located at the
opposed outer areas of the turnout and cooperate with the outermost rail.
[0004] In the device disclosed in
EP1024988, point displacement is applied to the two outer points of the two pairs of points
only. Each of the outer points is connected to an inner point by means of a rigid
connecting rod. For proper operation of the turnout, the thrown position of the points
is alternately assumed by one outer point of one of the two pairs of points and by
the inner point of the other pair of points, which also determines which ones of the
two points of the one and the other pairs have to be connected together.
[0005] Therefore, the outer points pull along the inner points during their displacement
and also, when lock devices are provided for locking the outer points in their thrown
position against the associated outer rail, they also lock the inner point associated
therewith, which has reached its thrown position against the associated inner rail.
[0006] The connecting rods are located below the tracks, in channel formed in the borrow
for accommodating said rods, which is not protected at present. On the other hand,
these rods are an important and critical feature for proper operation of the turnout
and, should one of these get broken, the corresponding inner point would be free to
assume any position relative to the associated rail, as it would be disengaged from
the point locking means and the point displacing means.
[0007] A first object of the present invention consists in making a turnout as described
hereinbefore safer for railway traffic, particularly against any damage.
[0008] The invention solves this problem by providing a turnout as defined in the preamble
of claim 1, which further comprises the characteristics of the characterizing part
of claim 1.
[0009] The provision of a stand that accommodates the rods, which stand has exactly the
same size as a tie, and which stand replaces a tie, allows the rods to be protected
from any damage or obstacle to their free sliding motion, such as buildup of borrow,
or any part of material falling into the rod channel and hence interfering with free
rod motion.
[0010] The dependent claims disclose further advantageous characteristics of the invention.
[0011] Particularly, the turnout has point lock/unlock means for locking/unlocking the points
in and from their thrown positions also for the central points. These means are provided
in the central area of the switch stand and are shared by the two central points,
sliders being provided for driving said central points, and cooperating with means
for locking/unlocking the latter in and from the point thrown position, which means
allow or prevent translation of said sliders, when one of the two central points reaches
the closed or thrown position or when the turnout is operated to displace the points
into the other closed or thrown position, respectively.
[0012] Still according to this advantageous variant embodiment, the lock/unlock means for
the central points are also connected to means for transferring a point displacement
drive generated by a motor, whereby the central points are pulled or pushed by the
outer points not only through the connecting rods, but also through the common lock/unlock
means, which are directly controlled by the driving motor, like the outer points.
[0013] In a further improvement of the invention, the first switch stand and the second
stand for the connecting rods are formed with a modular construction.
[0014] The latter is particularly formed as described and shown in
EP 1594732.
[0015] According to yet another improvement, the lock/unlock means for locking/unlocking
the central points in and from the closed position are also modular and formed like
said means for locking/unlocking the frog of a turnout, as described in
EP 1594732.
[0016] A further object of the invention is to provide a turnout of so-called English type
with a construction in which the locking/unlocking, i.e. point locking and displacement
features for the central points are independent from those for the outer points, to
prevent any damage or malfunction of the lock/unlock means for the outer points and/or
the connecting rods that connect them to the corresponding central point, from causing
failure of the central points to be locked in position or connected to the displacing
means.
[0017] The invention solves this problem by the characteristics of claim 15.
[0018] The independent claims relate to further improvements.
[0019] The provision of lock/unlock means for the central points that are shared by the
two central points and independent of those of the outer points, and that are also
dynamically connected to the motorized point displacing means, affords control and
monitoring of the central points independent of the outer points, and also, in addition
to the rigid connecting rods between the inner, i.e. central and the outer points,
provides a double safety feature for the outer points and the inner points which always
ensures the possibility of displacing all the points and locking them in the closed
position even when one of the lock/unlock means or the transfer of the point displacing
drive is damaged, regardless of whether this involves said means for the inner points
or those for the outer points.
[0020] The invention also has the object to provide a turnout of the English type that has
a efficient and cost-effective construction and allows easy replacement of the operating
units.
[0021] This object is fulfilled by a turnout as defined in claim 17.
[0022] The modular construction helps to maintain low fabrication costs and speeds up and
facilitates maintenance, replacement of damaged parts and repair of these parts.
[0023] The dependent claims relate to advantageous improvements of the invention.
[0024] The invention and the advantages derived therefrom will appear more clearly from
the following description of a non limiting exemplary embodiment as shown in the accompanying
drawings, in which:
Fig. 1 shows a turnout of so-called English type according to the prior art.
Fig. 2 is a plan view of a section of an enlarged detail of an English-type turnout
of the present invention.
Fig. 3 is a perspective view of the detail of Fig. 2.
Fig. 4 shows the turnout ties as viewed in the axial direction.
Figure 5 is a longitudinal sectional view of the tie-like switch stand in which the
housing stand is highlighted as a modular element of said switch stand.
Figure 6 is a view like Figure 5, in which the motor module is highlighted.
Fig. 7 is a view like Figure 6, in which the drive module is highlighted.
Fig. 8 is a perspective view of the motor module, separate from the stand.
Fig. 9 is a perspective view of the drive module, separate from the stand.
Figs. 10A, 10B and 10C are views like Figure 5, in which the point locking module
is highlighted, which constitutes the lock/unlock means for locking/unlocking the
right outer point, the inner points, and the left outer point.
Fig. 11 is a perspective view of the two point locking modules for the two outer points.
Fig. 12 shows the point locking module shared by the inner points.
Fig. 13 shows, like Figure 5, the modules for fastening the rails and the points to
the switch stand and the point pulling means respectively.
Figs. 14 and 15 are enlarged lateral views of the modules for fastening a rail and
the means for fastening the associated outer point to the sliders for pulling the
associated point locking device, in a normal condition and after trailing respectively.
Figs. 16A and 16B are enlarged lateral views of the means for fastening the inner
rails and the inner points to the stand and the sliders of the point locking devices
respectively, and in a normal condition and after trailing respectively.
Figs. 17 to 19 are exploded and perspective views of various steps for assembling
the modular switch stand as shown in Figs. 5 to 16.
Fig. 20 is a view like Fig. 5 of the second tie-like stand for accommodating the rods
for connection of the outer points to the inner points, with the stand being highlighted
as a modular element.
Fig. 21 is a view like Fig. 20, which highlights the connecting rod module.
Fig. 22 is a view like Fig. 20, which highlights the modules for fastening the connecting
rods to the points.
Fig. 23 is an exploded perspective view of the second stand for housing the connecting
rods, with the latter outside the stand.
Fig. 24 is a lateral view of the central area of the turnout, showing the brackets
for fastening the connecting rods to the inner points.
Fig. 25 is a view like Fig. 24 of the area of an outer point, which shows the bracket
for fastening the connecting rod to the outer point.
[0025] Figure 1 shows a prior art turnout of so-called English type, which is provided at
crossings and has four points. Such turnout is described in greater detail in
EP 1024987 and
EP 1219521 which disclose particular embodiments thereof and shall be deemed to be part hereof
for all technically compatible parts, concerning the construction of means and devices
that can be used in combination with the guiding principle of the present invention.
In the English-type turnout as shown therein and in the one of the present invention,
two tracks are provided with the rails B1, B1' and B2, B2' cooperating with the points
A1, A1' and A2, A2' respectively. A switch stand 1 having a shape and a size substantially
corresponding to those of a rail tie houses the means for displacing the points A1,
A1' and A2, A2'. The rails B1, B1', B2, B2' are secured to the tie-like switch stand
1. In both the prior art device and the device of the present invention, the four
points A1, A1', A2, A2' cooperate in pairs with the rails B1, B1', B2, B2' of a track
and are operated together. For this purpose, the switch stand as described in the
above documents uses a single drive for the four points A1, A1', A2, A2' whereas,
the outermost points A1, A2' only are provided with means for removably locking them
in the thrown position against the associated rail B1, B2'. The inner points A1',
A2 are locked in the thrown position by a rigid connection 55 , e.g. a connecting
rod for connection to the outer point A1, A2', which assumes the thrown position with
the innermost one A2, A1'.
[0026] Therefore, in the so-called English turnout, two tracks cross each other and have
a pair of rails B1, B1', B2, B2' cooperating with a first and a second pair of points
A1, A1' and A2, A2' respectively. A point A2, A1' respectively of each of said first
and second pairs of points is located in the central area of the turnout and the other
two points A1, A2' of the two pairs of points are located at the opposed outer areas
of the turnout.
[0027] The mechanical connecting rods connect each of the points A2 and A1' in the central
area of the turnout, belonging to the first and second pairs of points respectively
with one of the outer points A1 and A2' of the other pair of points, which outer point
assumes the closed position with the corresponding point in the central area of the
stand.
[0028] In the prior art turnout, the points are alternately moved to the closed position,
i.e. to the thrown position of said point A1, A2, A1', A2' against an associated rail
B1, B1', B2, B2', one of the two points of each of said two pairs are driven by common
means for combined point displacement. The closed position, also known as thrown position,
is simultaneously reached by the two points A1, A2; A1', A2', one of which is a point
of the first pair of points A1, A1', while the other is a point of the second pair
of points A2, A2'. One of the points in said closed position is always a point A1,
A2' located in the outer area of the turnout, whereas the other point A2, A1' is a
point located in the inner area of the turnout.
[0029] Prior art turnouts further have lock/unlock means which only directly operate on
the drive means for the outer points of said two pairs of points. These means are
located at the rail associated with the corresponding outer point and lock the outer
points A1, A2' in their respective closed position. The inner points are moved and
locked in their closed position by the connecting rods 55 only, which rigidly connect
each of them to a corresponding outer point, i.e. the one that assumes the closed
position with the inner point with which it is connected.
[0030] Figures 2 to 25 show an English turnout of the present invention. Concerning construction,
this turnout has substantially the same functional parts and substantially the same
configuration as the prior art turnout. However, as shown in the figures, in accordance
with a first advantageous characteristic, a housing stand is also provided for the
connecting rods 55.
[0031] Particularly, as shown in Figures 2 and 3, the connecting rods 55 are fastened to
the ends of their respective points A1, A2, A1', A2', whereas such ends of the points
are aligned with the central longitudinal axis of a railway tie. The housing stand
1' is provided as a replacement of the tie and acts both as a tie and as a housing
compartment, similar to the switch stand 1, which acts both as a tie and as a housing
for the point displacing means and the other operating units required for operation
of the turnout.
[0032] In the illustrated embodiment, the ends of the points are also advantageously provided
at a distance from the central longitudinal axis of the switch stand 1 that houses
the point displacing means and the other operating units of the turnout that is equal
to the center-to-center distance of the ties, whereby the switch stand 1 and the housing
stand 1' for the connecting rods 55 replace two parallel adjacent ties.
[0033] Of course, this geometry shall be intended without limitation, because the two stands
1, 1' may be also located at a distance other than the center-to-center distance of
the ties.
[0034] The fastening position of the connecting rods may also not be at the ends of the
points, as the connecting rods may be also fastened to the points at an intermediate
location on the side of the switch stand 1 opposite to the point ends. Also in this
case, the rods will substantially coincide with the central longitudinal axis of the
tie, for the housing stand to be used both as a housing for the connecting rods 55
and as a tie. Here, the switch stand 1 is closer to the point ends than to the rod
housing stand.
[0035] As described in greater detail hereafter, the connecting rods 55 are driven by rigid
brackets below the bottom plane of the rails and at such a depth that said rods fall
with their longitudinal axis and their displacement stroke within the cross section
of the tie and hence of the housing stand 1'. The brackets 155 for fastening the connecting
rods to the points form downward vertical extensions at whose ends the connecting
rod is connected. Otherwise, the connecting rod may have angled ends radially extending
from its longitudinal axis and having such a length as to maintain the rod section
oriented horizontal or parallel to the displacement stroke thereof, in the cross section
of the housing stand 1, obviously when the latter is being operated.
[0036] The rails are fastened to the box of the switch stand 1 and to the housing stand
1' in a similar manner. Several fastening arrangements may be provided, including
those described in
EP 1024987,
EP 1219521 and
EP1594732. Particularly, the fastening arrangement as described in
EP1594732 will be used in this example: The stands 1, 1' have a vertical threaded pin 20 in
their opposed end areas external to the corresponding outer rail A1, A2', the fastening
base 121 of a rail locking element 21 being fitted on said pin. The locking element
21 has a vertical extension 221 which is supported in a cantilever fashion towards
the corresponding rail 4, 5. The vertical extension 221 has a wedge shape, corresponding
to the flared I shape of the rail. Said extension may be adapted to be secured by
one or more threaded pins against the corresponding rail, in a position in which it
is wedged in the flared recesses of the I section of the rail. This provides accurate,
self-centering and clearance-free positioning. As shown in the figures, a similar
fastening arrangement is also provided for the inner rails B2, B1', although in this
case the fastening means are smaller for space requirement reasons.
[0037] According to yet another characteristic of the invention, as described in greater
detail below, the switch stand 1 houses a drive motor M which, through a drive 10
that converts the rotary motion of the motor into a linear motor, drives in a sliding
fashion the point pulling rods, which pulling rods are provided in combination with
point locking means. The latter consist of point locking means which lock the points
against displacement applied thereon, and are operated as soon as a point reaches
its closed position, i.e. its thrown position against the corresponding rail. If the
motion to displace the point away from its thrown position against the rail so that
the other point/s, previously not thrown, can be moved into said position, is applied
by the motor and the drive, the locking means are switched to the idle position thanks
to an overrun that generally controls the point pulling rods. The lock/unlock means
generally consist of hook-like means or latches which are moved into an active or
inactive locking state according to the position of the point with which they are
connected relative to the rail. The displacement of the hook-like means or latches
is controlled by cams that are displaced with the pulling rods and act upon said hook-like
or latch means by displacing them, according to the position of the point and the
stroke being run, from a position of engagement with a hook-receiving or retaining
seat to a position of disengagement from said seat.
[0038] The point locking devices and the latches may have any construction whatever, for
instance as described in any one of
EP 1024987,
EP 1219521 and
EP1594732 or of other types.
[0039] According to the invention, dedicated point locking means 141, 142, 143 are also
provided for the inner points.
[0040] In this case, since there is a small space for accommodating said means, such point
locking means are shared by both inner points A2, A1'.
[0041] Particularly, for this purpose, a common dedicated point pulling rod is provided
for the inner points A2, A1', which pulling rod has automatic point displacement locking
means which are triggered every time that one of the points reaches its closed position,
irrespective of which inner point has reached said position. Likewise, the inner points
are both unlocked and translated together when the displacement thereof is controlled
by the motor.
[0042] In this case, a construction of the dedicated point pulling and locking devices for
the inner points is advantageously as described concerning the frog moving and locking
means in
EP 1594732.
[0043] Referring to the figures, a further characteristic, to be described in greater detail
below, is that both the switch stand 1 and the housing stand 1' have a modular construction,
and that substantially identical elements are used to form identical parts, or parts
having identical functions.
[0044] The example of the turnout as shown in Figures 2 to 25 relates to a particular embodiment
in which the switch stand 1 with its operating units and the housing stand 1' with
the point tip connecting rods, have a modular construction.
[0045] The detailed construction characteristics of the turnout as described with reference
to this embodiment shall not be intended to be limited to the combination with the
modular embodiment, but are also applicable to a non-modular construction.
[0046] As shown in the figures, and particularly in Figures 17, 18, 19 and 23, the switch
stand 1 and the housing stand 1' have a box module 100 in the form of a channel section
with lateral longitudinal fins having holes in predetermined positions for receiving
cover elements and/or lateral flanges for fastening operating modules such as the
point pulling and locking modules, and the rail fastening modules, as described hereinafter.
The ends of the channel section (also known as omega section) are closed by end heads
130 that may also be removably fastened or possibly welded.
[0047] Figures 5 to 7 are schematic views of the switch stand, in which the various modules
are highlighted from time to time in gray. Figure 5 shows the box module 100. Figure
6 shows the motor module M, which is separately shown in Figure 8. The motor module
M has an independent case having a base flange 10, whereby it can be removably fastened,
by bolts or the like to the bottom of the box 100. On the side facing the interior
of the box 100, the motor module M has an output shaft having a part 11 of a coupling
joint 12 for a drive module 110 fastened thereto. Such drive module is highlighted
in gray in Figure 7 and separately in Figure 9. Particularly the coupling joint fastened
to the shaft of the motor M can be opened and allows separation of the drive of the
motor M. Also, the drive module consists of a drive that converts the rotary motion
of the motor M into a linear translational motion directed along the longitudinal
axis of the box 100 and the point displacement axis. The illustrated embodiment comprises
a threaded rod 111 cooperating with a nut screw, not shown.
EP 1024987,
EP 1219521 and
EP1594732 describe a few embodiments of such drive in greater detail.
[0048] The threaded drive actuating rod has a terminal 112 for removable coupling to the
remaining operating parts that pull the points along their stroke, whereas the drive
110 has the joint part 113 connected to the corresponding part on the shaft of the
motor M.
[0049] Figures 17 to 19 show the above mentioned modular operating parts by exploded views.
[0050] Figures 10A to 10C show the switch stand in the same manner as Figures 5 to 7, with
the point pulling and locking modules for the outer points A1 and A2' and the inner
points A1', A2 respectively, which are referenced 141, 142, 143.
[0051] These are shown alone in Figures 11 and 12 and are also visible in the exploded views
of Figures 18 and 19.
[0052] These modules have a pulling rod 144 which is dynamically connected to pulling sliders
145 that project out of an upper fastening plate 146. The fastening plate 146 has
lateral holes for fixation to the lateral longitudinal fins of the box 100 and also
forms the closing cover of said box 100 when the module is mounted to the box. The
pulling sliders 145 have threaded holes for fixation of point fastening brackets thereto.
[0053] The pulling rod 144 has a terminal for removable coupling to a further connecting
rod of the central module 142 and for one of the external modules 141 and also for
coupling to the terminal of the drive 110.
[0054] As shown in the figures, the point displacing motion is transferred by the drive
110 to the pulling rod of the point pulling and locking module 141 and to the pulling
rod of the central point pulling and locking module 142, i.e. the one for the inner
points. The motion to the last point pulling and locking module 143, which is located
at the distal end of the stand 1 with respect to the drive 110, is transferred to
the pulling rod 144 of this module through the pulling rod of the intermediate module
142.
[0055] The central module has the same construction as the modules 141 and 143 for the outer
points, both in terms of fixation to the flange of the box 100 and in terms of the
presence of pulling sliders, which in this case are shared by both points.
[0056] Concerning construction, the point pulling and locking module 141, 142, 143, may
have any construction whatever, e.g. as described in
EP 1024987 and
EP 1219521, which provide hook-like means as means for removably locking the points in the closed
positions, or as described in
EP 1594732, which provides latches and engagement seats, which latches are displaced to engagement
or disengagement with or from said seats, by cams that are displaced in synchronism
with the actuation of the points by the same point displacing means. The figures do
not show the particular construction of the point pulling and locking devices, but
this is described in detail in the above mentioned documents, and in this example
it is identical to the one of
EP 1594732.
[0057] Figure 14 and figures 14 and 15 and 16A and 16B show the modules for fastening the
rails to the stand and the points to the pulling sliders 145 of the point pulling
and locking modules 141, 142, 143.
[0058] The rails are fastened to the box 100 as described above with reference to
EP 1584732.
[0059] More in detail, as shown in Figure 14, each outer point A1, A2' (the point A2 is
shown in figure 14, but the construction is the same and symmetrically reversed for
the point A1') is fastened to a pulling slider 145 by means having calibrated rupture
characteristics. A pin 200 is fastened to each pulling slider 145 by means of bolts
or in any other removable manner. The pin 200 is axially engaged in a receiving seat
210 which is composed of two parts connected together by a fastening pin 220 having
calibrated rupture characteristics under the action of an external force, i.e. formed
in such a manner as to break under the action of a predetermined internal force that
strives to displace the point although the latter is locked in its position. One part
of the seat 210 is formed in the part of the bracket 230 connected to the point and
one part of the said seat that complementa the first part formed in the bracket 230
connected to the point consists of a removable part 250 that is fastened to said part
of the bracket 230 through said calibrated rupture pin 22. Advantageously, the two
seat parts 210 formed in the two bracket parts 230, 250 that complement each other
to form the wholly closed receiving seat, have at least identical angular extensions,
180° for each part, or the seat part formed by the removable bracket 250 has an angular
extension of more than 180°.
[0060] Figure 15 shows a condition in which the calibrated rupture fastening pin 220 is
operated.
[0061] In this case the rupture threshold is 40 KN. If a train runs through the switch in
the wrong direction and forces the switch points by its wheels with a force of at
least 40 KN in the point displacement direction, in a switch condition opposite to
the preset one, the fastening pins 220 break and, although the point locking devices
are operating, the points are released therefrom and can move without causing any
further damage to the other operating parts.
[0062] Figure 16A and Figure 16B show the brackets for fastening the inner points A1', A2
to the pulling sliders 145 of the central point pulling and locking module 142.
[0063] The principle is similar to the one that regulates fixation of outer points. The
only difference is that each pulling slider 145 of the two that are available is connected
to a single inner point respectively whereas, as particularly shown in Figure 3, for
the outer points both pulling sliders are connected to the points.
[0064] In Figure 16 identical parts are referenced by the same numbers as in Figures 14
and 15.
[0065] As shown in Figures 17 to 19, the box parts that are open at their top as they are
not filled by operating units are closed by a plurality of cover elements having the
same size as said open or exposed parts. Such cover elements are referenced 260.
[0066] Figures 20 to 22 show, like Figures 5 to 7, the housing stand 1 for the point connecting
rods 55.
[0067] Here, Figure 20 highlights the box 100 as a first construction element. The box 100
advantageously has a construction similar to the one of the switch stand of the previous
figures, as also shown in Figure 23. This figure clearly shows that the box having
a channel section and lateral longitudinal flanges is closed at its top by cover elements
260 that leave open windows 27 for the angled end portions 155 of the pulling rods
55 whereby they are connected from the bottom to the ends of their respective points.
[0068] Figure 21 highlights the rods as construction modules. These are in the form of straight
elongate elements 255 of predetermined length, whose ends portions have end rod driving
portions 155 connected thereto for driving the rods below the rail level, to a position
coinciding with the interior of the housing stand 1'.
[0069] Figure 22 shows the means for fastening the connecting rods 55 to the points as the
last modular elements.
[0070] These are shown in greater detail in Figures 24 and 25, for the inner points and
the outer points respectively.
[0071] According to the combination of Figures 2 and 3, the rods are connected to the corresponding
end of a point through a terminal 280 that is fastened by transverse through screws
to the point face opposite to the rail against which it is thrown, in the end section
of said point. The bracket 280 has a receiving seat for an end pin 355 located at
the press-fit ends of the angled fastening terminals 155 of the connecting rods 55,
which pin is locked when it is press fitted therein. The press-fit terminal 355 may
be locked in position in the seat of the bracket 280 fastened to the point in any
manner.
1. A railway, tramway or the like turnout of so-called English type, which turnout comprises
four points and wherein
two tracks cross each other and have one pair of rails (B1, B1' , B2, B2'), which
cooperate with first and second pairs of points (A1, A1'; A2, A2') respectively, one
point (A2, A1') of each of said first and second pairs of points being located in
the middle of the turnout and the other two points (A1, A2') of the two pairs of points
being located at the opposed outer areas of the turnout;
said turnout comprising a point-controlling switch stand of the type having the form
and function of a tie in which motor means are housed for combined displacement of
at least the outer points,
and rigid mechanical connecting means being provided for connecting each of the points
(A2; A1') in the central area of the turnout, belonging to the first and second pairs
of points respectively with one of the outer points (A1, A2') of the other pair of
points, which outer point assumes the closed position with the corresponding point
in the central area of the stand,
characterized in that a second stand is provided, having the form and function of a tie, which is designed
to be located at a predetermined distance from the first switch stand, and said rigid
connecting means are fastened to the corresponding points in such a position that
said rigid connecting means extend into said second stand.
2. A turnout as claimed in claim 1, characterized in that it comprises
motorized means for combined displacement of the points, whereby each time that the
turnout is actuated, one of the two points of each of said two pairs is alternately
moved to the closed position, i.e. the thrown position of said point (A1, A2; A1',
A2') against an associated rail (B1, B1', B2, B2'), said closed position being simultaneously
reached by the two points (A1, A2; A1', A2'), one of which is a point of the first
pair of points (A1, A1') and the other is a point of the second pair of points (A2,
A2') and one of said points in said closed position is always a point (A1, A2') located
in the outer area of the turnout and the other point (A2; A1') is a point located
in the inner area of the turnout;
and lock/unlock means (141, 142, 143) for locking/unlocking at least the outer points
of said two pairs of points in the closed position thereof, which means are located
in the area of the rail that is associated with the corresponding outer point and
lock said outer points (A1, A2') in their respective closed positions, each of said
lock/unlock means being moved to the active locking position when the corresponding
point (A1, A2') reaches the closed position against the corresponding rail, whereas
said lock/unlock means (141, 142, 143) are automatically moved to an unlocking position
when the turnout is actuated to move the points into the closed position of the other
two points (A2, A2'), i.e. when said motorized point displacing means are actuated,
said motorized point displacing means and/or at least said lock/unlock means for locking/unlocking
the points in the closed position being housed in the first switch stand (1).
3. A turnout as claimed in claim 1 or 2, characterized in that said point connecting means consist of connecting rods, which are connected by each
of their ends, through vertical fastening brackets, to a corresponding point, and
extend to a given extent below the rails and the points, while being also connected
to the points at a given distance from said first switch stand that houses at least
said motorized point displacing means and/or at least said lock/unlock means for locking/unlocking
the points in the closed position, in the direction of the longitudinal extension
of the points and/or tracks and in a position coinciding with the interior of said
second stand, and whereas the vertical fastening brackets project outwards from said
second stand through slot-like apertures oriented in the point displacing direction,
which are at least as long as the point displacing stroke.
4. A turnout as claimed in one or more of the preceding claims, characterized in that said point connecting rods are connected to the free ends of the points.
5. A turnout as claimed in one or more of the preceding claims, characterized in that said connecting rods for rigid connection of the points are oriented in the point
displacing direction, and essentially in the direction of longitudinal extension of
the second tie-like stand.
6. A turnout as claimed in one or more of the preceding claims, characterized in that the free end of the points is located at a distance from the first switch stand that
is substantially equal to the center-to-center distance of the ties, said second stand
being provided instead of the tie directly adjacent to the switch stand.
7. A turnout as claimed in one or more of the preceding claims, characterized in that it has lock/unlock means for locking/unlocking the inner points of said two pairs
of points, which means are shared by both inner points (A2, A1') and are moved into
the active locking state for locking both of said inner points (A2, A1') when one
of these two inner points reaches its closed position against the corresponding rail
at the same time as the outer point of the other pair of points, whereas said lock/unlock
means (141, 142, 143) are automatically moved into the unlocking state when the turnout
is actuated to move the points into the closed position of the other two points, i.e.
when said motorized point displacing means are actuated.
8. A turnout as claimed in one or more of the preceding claims, wherein the motorized
displacing means are shared by both outer and inner points and are connected to both
inner and outer points.
9. A turnout as claimed in one or more of the preceding claims, characterized in that the lock/unlock means for locking/unlocking the inner points in their closed position
are also housed in the first switch stand.
10. A turnout as claimed in one or more of the preceding claims, characterized in that the lock/unlock means are of non-trailable type.
11. A turnout as claimed in claim 10, characterized in that the lock/unlock means have mechanical members or are connected to the outer points
and/or the inner points via said mechanical members, which mechanical members have
a predetermined rupture behavior when the force applied thereon exceeds a predetermined
value, so that they break and release the drive means under the action of a predetermined
point displacing force directly applied on the points, particularly by rolling stock
wheels.
12. A turnout as claimed in one or more of the preceding claims, characterized in that at least the first stand and at least said motorized point displacing means and at
least said lock/unlock means for locking/unlocking the inner and outer points are
formed with a modular construction, whereby
the modules include one motor module (M), one drive module (10), and at least one
or two separate point locking, controlling and coupling modules (141, 142, 143);
each module has its own case or frame, which case or frame has means for fastening
it in predetermined positions, cooperating with coincident fastener means, in predetermined
positions on the tie-like box module (100),
the case (100) consists of a C-section open at its top, that is closed by a cover,
a portion of the cover of the case (100) is formed by the upper covers of the modules
and the other portions of the cover of the box (100) are formed by special covers
(260),
said case (100) has lateral longitudinal flanges (110) having holes (215) allowing
the different modules to be fastened thereon,
the cases or frames also having holes at predetermined positions coinciding with the
holes of the case (100) and being mounted in a predetermined position with reference
to the case (100) and to the other modules (16) by fastener means.
13. A turnout as claimed in claim 12, characterized in that the rigid point connecting rods and the corresponding second housing stand also have
a modular construction.
14. A turnout as claimed in claim 12 or 13, characterized in that the lock/unlock means shared by the inner points also have a modular construction,
and consist of a locking module of a modular switch stand, for the frog of a traditional
turnout.
15. A railway, tramway or the like turnout of so-called English type, which turnout comprises
four points and wherein
two tracks cross each other and have one pair of rails (B1, B1', B2, B2'), which cooperate
with first and second pairs of points (A1, A1'; A2, A2') respectively, one point (A2,
A1') of each of said first and second pairs of points being located in the middle
of the turnout and the other two points (A1, A2') of the two pairs of points being
located at the opposed outer areas of the turnout;
said turnout further comprising motorized means for combined displacement of the points,
whereby each time that the turnout is actuated, one of the two points of each of said
two pairs is alternately moved to the closed position, i.e. the thrown position of
said point (A1, A2; A1', A2') against an associated rail (B1, B1', B2, B2'), said
closed position being simultaneously reached by the two points (A1, A2; A1', A2'),
one of which is a point of the first pair of points (A1, A1') and the other is a point
of the second pair of points (A2, A2') and one of said points in said closed position
is always a point (A1, A2') located in the outer area of the turnout and the other
point (A2; A1') is a point located in the inner area of the turnout;
the turnout also comprising lock/unlock means (141, 142, 143) for locking/unlocking
at least the outer points of said two pairs of points in the closed position thereof,
which means are located in the area of the rail that is associated with the corresponding
outer point and lock said outer points (A1, A2') in their respective closed positions,
each of said lock/unlock means being moved to the active locking position when the
corresponding point (A1, A2') reaches the closed position against the corresponding
rail, whereas said lock/unlock means (141, 142, 143) are automatically moved to an
unlocking position when the turnout is actuated to move the points into the closed
position of the other two points (A2, A2'), i.e. when said motorized point displacing
means are actuated;
at least said motorized point displacing means and/or at least said lock/unlock means
for locking/unlocking the points in the closed position, being housed in a switch
stand (1) that essentially has the size and shape of a tie and is designed to be mounted
in the track instead and with the function of a tie,
characterized in that
it further has lock/unlock means for locking/unlocking the inner points of said two
pairs of points, which means are shared by both inner points (A2, A1') and are moved
into the active locking state for locking both of said inner points (A2, A1') when
one of these two inner points reaches its closed position against the corresponding
rail at the same time as the outer point of the other pair of points, whereas said
lock/unlock means (141, 142, 143) are automatically moved into the unlocking state
when the turnout is actuated to move the points into the closed position of the other
two points of said two pairs, i.e. when said motorized point displacing means are
actuated.
16. A turnout as claimed in claim 15, characterized in that it has the characteristics as claimed in one or more of claims 1 to 14.
17. A railway, tramway or the like turnout of so-called English type, which turnout comprises
four points and wherein
two tracks cross each other and have one pair of rails (B1, B1' , B2, B2'), which
cooperate with first and second pairs of points (A1, A1'; A2, A2') respectively, one
point (A2, A1') of each of said first and second pairs of points being located in
the middle of the turnout and the other two points (A1, A2') of the two pairs of points
being located at the opposed outer areas of the turnout;
said turnout comprising a point-controlling switch stand of the type having the form
and function of a tie in which motor means are housed for combined displacement of
at least the outer points,
characterized in that
at least the first stand and at least said motorized point displacing means and at
least said lock/unlock means for locking/unlocking the inner and outer points are
formed with a modular construction, whereby
the modules include one motor module (M), one drive module (10), and at least one
or two separate point locking, controlling and coupling modules,
each module has its own case or frame, which case or frame has means for fastening
it in predetermined positions, cooperating with coincident fastener means, in predetermined
positions on the tie-like case module (100),
the case (100) consists of an C-section open at its top, that is closed by a cover,
a portion of the cover of the case (100) is formed by the upper covers of the modules
and the other portions of the cover of the box (100) are formed by special covers
(260),
said case (100) has lateral longitudinal flanges (110) having holes (215) allowing
the different modules to be fastened thereon,
the cases or frames also having holes at predetermined positions coinciding with the
holes of the case (100) and being mounted in a predetermined position with reference
to the case (100) and to the other modules (16) by fastener means.
18. A turnout as claimed in claim 17, characterized in that it has the characteristics as claimed in one or more of claims 1 to 16.