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(11) | EP 2 149 638 A2 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Block tram rail half-switch |
| (57) Block tram rail half-switch (1) consisting of a block body (4) having a shape adapted
to a curved geometry, the switch (1) being connected to construction rails (5) having
rail grooves (6) which continually pass from the construction rails (5) across the
body block (4), wherein a footing (7) of the block body (4) is provided with a recess,
a sliding surface (8) is prepared on the block body (4), where a latch (9) is to be
placed, and wherein the block body (4) also houses a prepared latch stretcher (10).
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Technical Fields
[0001] The technical solution concerns the half-switch in block version for tram rail switches and the method of its production.
Contemporary State of the Art
[0002] The hitherto existing solutions include assembled switches consisting of curved rails connected by screws via insets and equipped with a sliding metal plate. The disadvantages of such switches include high weight, work expenditure, possibility of screws loosing, demanding maintenance and emerging reduction of safety of tram passage through the switch and necessity of more frequent controls.
[0003] Another known version of switches includes welded witches consisting of several parts. But event these switches have several screwed components, which is an disadvantage from the point of view of screws loosing and related higher demands towards maintenance. Other disadvantages of these solutions include more work expenditure in production, lower production precision, possibility of welds cracking and final instability of the construction.
[0004] Other known versions include switches with the basic shape of the body block set in advance (form casting or rolling), which means that there is not set its variability for various radii of switches. The impossibility of variability is a disadvantage for solution of switches with different geometric parameters.
Subject of the Invention
[0005] The aim of the invention is to maximally eliminate the above stated imperfections. This can be reached by a block half-switch according to this invention, which is based mainly on the fact that it consists of the block body with shape processing in required geometry of curving and non-rewirable connected construction rails in one unit with a rail groove continually passing from the construction rails through the block body, while - in the recession of the block body - there is placed a latch on the sliding surface made on the block body and the block body houses the latch stretcher.
[0006] The advantage of such created block tram rail half-switch is the fact that it is not necessary to use the sliding board.
[0007] It is advantageous if the latch is fixed using the latch catch and screws in its root section in the block body, as it is not necessary any more to use any cover part or assemblage and revision cases.
[0008] It is purposeful to create a stretcher on the block body for the re-adjustment device, as it is not necessary to use an additional base board.
[0009] In consideration of block tram half-switch placement it is advantageous for the block body to contain surfaces for connecting means with cross-ties, as it allows fixation of the half-section with various types of catches.
[0010] It is purposeful if the block body contains a groove for the heating pipe, which is protected in a better way against sink water and there is arranged better heating of contact surfaces of the latch and the block body.
[0011] It is advantageous if the block body height is identical with the construction rail height, which allows for the substructure to be prepared in one ideal plane without any other height limitations. An advantageous method of block tram rail half-switch production is based on the fact that a baulk of rail quality material and of latch-corresponding dimensions is shape-formed in compliance with required geometry of curving. Then, such a processed baulk is welded - using electric resistance welding with flashing - with the construction rail and machining is used for making continuous grooves in such a semi-product as well as recessions for the latch placement. Then, processing is applied to create chambers for placement to the underbed, drainage holes, chambers for heating, holes for pulleys and latch stretchers. The construction rails are profiled in compliance with the rail superstructure used and the block tram rail half-switch is finished.
List of figures in drawings
[0012] The invention will be explained in detail using the drawings, where Fig. 1 shows the block tram rail switch, Fig. 2 shows a ample version of the block tram half-switch, Fig. 3.1 - 3.2 show a detail of A and B views, Fig. 3.3 - 3.5 shows a detail of sections C-C, D-D, E-E of the block tram half-switch according to Fig. 2, Fig. 4 shows a detail of the F-F section of the block tram half-switch according to Fig. 2.
Sample version description
[0013] As it can be seen in Fig. 1, the block tram rail half-switch 1 consists of two analogically created half-switches 2,3, of which half-switch 3 will be described in detail - it is no the right side of the switch 1. The half-switch 3 according to Fig. 2 consists of the block body 4 that is shaped-formed in required geometry of curving. The block body 4 is non-rewirably connected for example by resistance welding with construction rails 5, with their height being identical with the block body 4. The construction rails 5 according to Fig. 3.1, 3.2 are quipped with a groove 6, that passes continually from the construction rails 5 via the block body 4. According to Fig. 3.3., the block body 4 houses a recession on the footing 7 and according to Fig. 3.5 there is a sliding surface 8 for the latch 9, while the block body 4 also contains the latch stretcher 10. The latch 9 is placed on the block body 4 with its root section 14 according to Fig. 4 using the latch catch 11 and the screw 12, while the latch 9 is set to the stopper 17 fixed to inset 18. According to Fig. 3.4., directly on the block body 4 there I also created the stretcher 13 for not-shown resetting device. For the purpose of heating tube placement 15, there is created a groove 16 from the external side for the heating tube placement. Sink water removal is arranged by the de-watering hole 19. In all the ends of the half-switch, there is performed the profiling according to views A and B for ideal connection to the yard. So as the latch can be fixed by a non-shown pulley, holes 20 were drilled in the block body 4 for the pulleys.
[0014] The method of production of both the half-switches 2,3 is analogical. It is based on the body of prismatic shape, which is longitudinally adjusted by cutting so as to correspond with the latch size. On such a prepared body, the upper and lower surfaces are adjusted by milling. In compliance with marking, the body is heated and burnt out with a reserve for required geometry of curving. Consequently, milling according to machining program is used for reaching an exact basic shape of the block body 4 according to the geometry used, required height according to the construction rail used 5, it is made on the footing 7 for fixation to not-shown base, processing of the stretcher 13 for not-shown adjusting device, making of a groove 16 for heating tube 15. Then, there are drilled the holes 20 for pulleys. More, the construction rails 5 will be cut to required length and they will be profiled according to view A and B by milling in compliance with the machining program. The construction rails 5 will be welded using the method of electric resistance with flashing to the block body 4. Consequently, the welds from the upper and lower surface of the half-switch 3 will be milled to plane and the welds will be hot levelled. In compliance with the machining program, milling will be applied to the half-switch 3 to make a groove 6, sliding surfaces 7, latch stretchers 10, drainage holes 19, holes 20 for pulleys. And finally, the construction rails 5 welded o the block body 4 will be milled so as to reach the required final dimension of the half-switch 3.
[0015] Holes will be drilled to such a prepared half-switch 3 and there will be prepared threads in them for screws 12. Then there will be installed the latch 9 set to the stopper 17, which is welded to the inset 18. And finally, the latch 9 will be fixed by the latch catcher 11 and screws 12 to the half-switch 3.
Industrial applicability
1. Block tram rail half-switch, characterised by the fact that it consists of the block body (4) which was shape processed to required
geometry of curving and non-rewirably connected construction rails (5) with the rail
groove (6) continually passing from the construction rails (5) across the body block
(4), while on the footing (7)of the block body (4) there is made a recession and on
the sliding surface (8) prepared on the block body (4) there is placed the latch (9),
while the block body (4) also houses a prepared latch stretcher (10).
2. Block tram rail half-switch according to the claim 1, characterised by the fact that the latch (9) is fixed using the latch catcher (11) and screws (12)
in its root part (14) in the block body (4).
3. Block tram rail half-switch according to the claim 1 and 2, characterised by the fact that the block body (4) houses a stretcher (13) for the exchange element.
4. Block tram rail half-switch according any of the claims 1 up to 3, characterised by the fact that the block body (4) houses a recession in the footing (7) for connection
means with the cross-ties.
5. Block tram rail half-switch according any of the claims 1 up to 4, characterised by the fact that on the side wall of the block body (4) a groove (16) is made for the
heating tube (15).
6. Block tram rail half-switch according any of the claims 1 up to 5, characterised by the fact that the height of the block body (4) is identical with the height of the
construction rail (5).
7. Method of production of the block tram rail half-switch according to the claim 1,
characterised by the fact that the baulk of rail quality material and with latch-corresponding dimensions
is shaped according to required geometry of curving, and then such a processed baulk
is connected by electric resistance welding and flashing to the construction rails;
such a developed semi-product is machined so as to create continual grooves and recessions
for latch placement and then, processing will be applied so as to create chambers
for placement to the underbed, drainage holes, chambers for heating, holes for pulleys
and latch stretchers; the construction rails are profiled in compliance with the rail
superstructure used and the block tram rail half-switch is finished.