Guide plate and rail attachment point

Abstract

The invention relates to a guide plate for laterally guiding a rail in a rail attachment point formed on a railroad tie, wherein the guide plate has a top side having a support surface for supporting a spring element, an underside, by way of which the guide plate is supported on the railroad tie during use, a support segment having a support surface, by way of which the guide plate is supported, during use, on a shoulder provided on the railroad tie, and possesses a guide segment which is formed opposite to the support segment, and on which a guide surface is present, on which a rail is laterally guided during use. In order to counteract twisting of the rail and concomitantly the risk of the occurrence of track warping at high outdoor temperatures when using such a guide plate in a rail attachment point, a latch projection is formed in lateral end segments of the guide surface, in each instance, projecting away from the guide surface in the longitudinal direction of the guide plate, which is provided for the purpose of engaging, during use, under the longitudinal side of the rail that is assigned to the guide surface, in each instance, wherein the distance between the latch projections amounts to at least 60% of the width of the guide surface.

Claims

1. A guide plate for laterally guiding a rail in a rail attachment point formed on a railroad tie, wherein the guide plate possesses: a top side, wherein a support surface for supporting a spring element is formed on, an underside, wherein the guide plate is supported on the railroad tie during use, a support segment, comprising a support surface on an end face of the support segment, wherein the guide plate is supported, during use, on a shoulder of the railroad tie, and a guide segment, the guide segment formed in a longitudinal direction of the guide plate, lying opposite the support segment, and on the end face of which a guide surface is present, on which a longitudinal side of the rail is supported during use, in order to guide the rail laterally, wherein the guide surface makes contact, with narrow sides of the rail, with one of a longitudinal side surfaces that delimit the guide plate on the longitudinal sides of the rail, in a corner region, wherein in end segments of the guide surface that border on the corner region, a latch projection that projects away from the guide surface in the longitudinal direction of the guide plate is formed, which latch projection is intended for engaging, during use, under the longitudinal side of the rail that is assigned to the guide surface, wherein the guide surface has a greater width than the support surface, so in that a projection of the support surface into the guide surface, the guide surface projects laterally beyond the support surface with end segments of the guide surface in which the latch projections are formed, and that in the width direction of the guide plate, a distance between the latch projections amounts to at least 70% of the width of the guide surface, and wherein the latch projections have a slanted surface on a top side of the latch projections, on which a rail foot is supported and which drops in the direction of a free end face of the latch projections.

2. The guide plate according to claim 1, wherein for a ratio BF/BS of the width of the guide surface to the width of the support surface, the following applies: 1.2BF/BS1.6.

3. The guide plate according to claim 1, wherein the underside of the latch projection meets with a lower delimitation edge of the end face of the guide plate that has the guide surface, and a height of the latch projections is at most equal to half a height of the guide surface.

4. The guide plate according to claim 3, wherein a slanted surface encloses an angle of at most 45 with a plumb line dropped to the guide surface.

5. The guide plate according to claim 4, wherein the latch projections extend over the width of the end segment of the guide surface.

6. The guide plate according to claim 1, wherein the latch projections border on the corner region assigned to them, in each instance, in which the guide surfaces make contact with a longitudinal side surface of the guide plate, in each instance.

7. The guide plate according to claim 1, wherein in an edge region of the top side bordering on the guide surface, a reinforcement rib is formed, which extends over the width of the guide surface.

8. The guide plate according to claim 7, wherein in edge regions of the top side of the guide plate bordering on the longitudinal side surfaces, a stiffening rib is formed, in each instance.

9. The guide plate according to claim 8, wherein the reinforcement rib makes a transition into one of the stiffening ribs at a lateral end of the reinforcement rib.

10. The guide plate according to claim 1, wherein when viewed in a top view of a top side of the guide plate, the top side is shaped with mirror symmetry with reference to a longitudinal axis.

11. A rail attachment point comprising a railroad tie that has a top side and two longitudinal sides, which come together with the top side of the railroad tie in a longitudinal edge, wherein a rail held in the rail attachment point is supported on a contact surface provided on the top side of the railroad tie, and wherein the railroad tie is oriented transverse to the rail and has a width measured in the direction of the longitudinal expanse of the rail, and a guide plate formed in accordance with claim 1, attached to the railroad tie, which plate is supported, by way of the guide plate support surface, on a shoulder provided on the railroad tie, and on the guide surface of which plate the rail is guided with one of the longitudinal sides of the rail, under which the latch projections engage.

12. The rail attachment point according to claim 11, wherein the width of the guide surface is at least equal to the width of the contact surface of the railroad tie, measured parallel to the longitudinal expanse of the rail.

13. The rail attachment point according to claim 11, wherein at least one intermediate plate is arranged between the rail and the railroad tie, by means of which plate the rail is held at a height distance above the contact surface of the railroad tie, which distance is at least equal to a height of the latch projections.

14. A guide plate for laterally guiding a rail in a rail attachment point formed on a railroad tie, wherein the guide plate possesses: a top side, wherein a support surface for supporting a spring element is formed on, an underside, which the guide plate is supported on the railroad tie during use, a support segment, comprising a support surface on an end face of the support segment, wherein the guide plate is supported, during use, on a shoulder of the railroad tie, and a guide segment, the guide segment formed in the longitudinal direction of the guide plate, lying opposite the support segment, and on the end face of which a guide surface is present, on which a longitudinal side of the rail is supported during use, in order to guide the rail laterally, wherein the guide surface makes contact, with narrow sides of the rail, with one of the longitudinal side surfaces that delimit the guide plate on the longitudinal sides of the rail, in a corner region, wherein in end segments of the guide surface that border on the corner regions, a latch projection that projects away from the guide surface in the longitudinal direction of the guide plate is formed, which projection is intended for engaging, during use, under the longitudinal side of the rail that is assigned to the guide surface, and wherein the guide surface has a greater width than the support surface, so that a projection of the support surface into the guide surface, the guide surface projects laterally beyond the support surface with end segments of the guide surface in which the latch projections are formed, and that in the width direction of the guide plate, the distance between the latch projections amounts to at least 70% of the width of the guide surface wherein the underside of the latch projections meets with a lower delimitation edge of the end face of the guide plate that has the guide surface, and a height of the latch projections is at most equal to half a height of the guide surface, and wherein a slanted surface encloses an angle of at most 45 with a plumb line dropped to the guide surface.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following, the invention will be explained in greater detail using a drawing that shows an exemplary embodiment. The figures schematically show, in each instance:

(2) FIG. 1 a rail attachment point in a view from above;

(3) FIG. 2 the rail attachment point in a side view;

(4) FIG. 3 a guide plate used in the rail attachment point, in a perspective view directed at its top side;

(5) FIG. 4 the guide plate in a side view;

(6) FIG. 5 the guide plate in a view from above.

DESCRIPTION OF THE INVENTION

(7) A rail S is attached in the rail attachment point 1, which rail is part of a track for rail vehicles, not shown here, in which usually two rails S are guided in parallel. The rail attachment points 1 provided for attachment of the rails S of the track are configured in the manner of the rail attachment points 1 in a route segment that tends toward track warping at high outdoor temperatures, while in the other route segments, conventionally structured rail attachment points of the general type indicated initially can be used.

(8) The rail attachment point 1 comprises a railroad tie 2 oriented transverse to the longitudinal expanse LS of the rail S, at the one end segment of which railroad tie the rail attachment point 1 is set up. At the opposite end segment, not shown here, the second rail of the track, to which the rail S attached in the rail attachment point 1 belongs, is attached in the same manner.

(9) The block-shaped railroad tie 2, which is conventionally shaped, in total, is produced from a concrete material, in known manner, and is mounted in a ballast bed, not shown here, also in known manner. In this regard, the railroad tie 2 has a top side 3 and two longitudinal sides 3, 3, which come together with the top side 3, in each instance, in a longitudinal edge LK, LK.

(10) On the top side 3 of the railroad tie 2, a contact surface 4 is formed, on which the components of the rail attachment point 1 sit. In the longitudinal direction LB of the railroad tie 2, which is oriented transverse to the longitudinal expanse LS of the rail S, the contact surface 4 is delimited, in each instance, by a shoulder 5, 6, which has a planar support surface 13, inclined relative to the vertical, proceeding from the contact surface 4, on its end face assigned to the contact surface 4, in each instance. In the edge regions of the contact surface 4 that come together with the corresponding shoulder 5, 6, in each instance, a groove 7, 8 is formed, in each instance, which groove extends over the width BB of the contact surface 4 of the railroad tie 2, measured transverse to the longitudinal expanse LS.

(11) The rail S stands, with the underside UF of its rail foot SF, on an elastic intermediate layer 9, which is embedded in the contact surface 4 of the railroad tie 2 in the center between the shoulders 5, 6. In this way, the rail S is supported in elastically resilient manner on the railroad tie 2, in the direction of gravity SR, in known manner.

(12) The rail attachment point 1 furthermore comprises two guide plates 10, shaped identically in one piece from a plastic material that has proven itself for this purpose, with one of these plates being arranged on one of the longitudinal sides of the rail S, in each instance.

(13) The guide plates 10, which are formed with mirror symmetry in a top view (FIG. 3), with reference to their longitudinal axis LF that is oriented in axis-parallel manner relative to the longitudinal axis of the railroad tie 2, are configured in the manner of angle guide plates and have an angle-shaped step 11, in a side view, on their underside with which they lie on the contact surface 4 of the railroad tie 2, and with which step they sit in the groove 7, 8 of the railroad tie 2 that is assigned to them, in each instance. In this regard, the step 11 is formed in the region of a support segment 12 of the guide plates 10, by way of which segment the guide plates 10 are supported on the shoulder 5, 6 of the railroad tie 2 assigned to the corresponding guide plate 10, in each instance. For this purpose, the support segment 12 of the guide plates 10 has a support surface 13 that extends over the width of the support segment 12 on its end face assigned to the shoulders 5, 6, which surface is inclined in accordance with the inclination of the support surface of the assigned shoulder 5, 6, so that in the completely installed rail attachment point 1, the support surface 13 of the guide plates 10 lies tightly against the entire support surface of the assigned shoulder 5, 6.

(14) The width BS of the support surface 13, which is the same as the width of the support segment 12, is at most equal to the width BB of the contact surface 4 of the railroad tie, so that the support segment 12 does not project beyond the width of the shoulders 5, 6, but rather its support surface 13 lies against the support surface of the corresponding shoulder 5, 6 with its full area.

(15) On their side facing the rail S, lying opposite the support segment 12, the guide plates 10 have a guide segment 14, in each instance, which carries a planar guide surface 15 on its end face assigned to the rail S, which surface has an elongated rectangular basic shape in the width direction of the guide plate 10.

(16) The rail foot SF lies tightly against the guide surface 15 with its corresponding longitudinal side 16, 17. In this regard, the guide surface 15 makes contact with one of the longitudinal side surfaces present on the longitudinal sides 16, 17 with one of its narrow sides, in a corner region 15a, 15b of the guide surface 15, in each instance, which surfaces delimit the guide plate 10 outward on its longitudinal sides.

(17) The guide surface 15 extends completely over the end-face width of the guide segment 14. In this regard, its width BF is equal to the width BB of the contact surface 4 of the railroad tie 2, so that the guide surface 15 extends, with its end segments 18, 19, which make contact with the corner regions 15a, 15b, over the entire width BB of the contact surface 4, in each instance, and thereby concomitantly over the top side 3 of the railroad tie 2 between the longitudinal edges LK, LK. At the same time, the ratio BF/BS of the width BS of the support surface 13 relative to the width BF of the guide surface 15 is BF/BS=1.5.

(18) Adjacent to the corresponding corner region 15a, 15b, in each instance, a latch projection 20, 21 is formed on the end segments 18, 19 of the guide surface 15 of the guide segment 14, in each instance, which projection projects away perpendicular to the guide segment 14 with reference to the guide surface 15, and is oriented flush with the underside of the guide plates 10 with its underside.

(19) The latch projections 20, 21 are formed, in each instance, in the lower half of the corner regions 15a, 15b of the guide surface 15 of the guide segment 14. Their maximum height HR corresponds to approximately one third of the maximum height HF of the guide surface 15 in the region between the latch projections 20, 21. In this regard, the height HR and the height HF are dimensioned in such a manner that when the rail attachment point 1 is completely installed, the latch projections 20, 21 engage under the longitudinal side 16, 17 assigned to the corresponding guide plate 10, and thereby act against the underside UF of the rail foot SF. In this regard, the distance BA between the locking projections 20, 21, measured in the width direction, amounts to at least 80% of the entire width BF of the guide surface 15.

(20) On their top side, the latch projections 20, 21 of the guide plates 10 have a slanted surface 22, in each instance, which, proceeding from the edge at which the top side of the corresponding latch projections 20, 21 makes contact with the guide surface 15, drops down in the direction of the free end face of the latch projections 20, 21. The angle 13 enclosed between the slanted surface 22 and a plumb line to the guide surface 15 amounts to about 40, in each instance, in a side view of the guide plates 10, so that the rail S, which sits on the latch projections 20, 21 with the edge between its corresponding longitudinal side 16, 17 and its underside UF, can slide along the slanted surfaces 22 when a lowering movement directed in the direction of gravity SR occurs.

(21) The guide segment 14 makes a transition at the longitudinal sides of the guide plates 10, in each instance, by way of a reinforced side segment 23, 24, into the support segment 12 of the guide plates 10. The side surfaces of the support segments 23, 24 have a continuous, transition-free progression, and thereby convert the width BF of the guide surface 15 to the width BS of the support surface 13. A reinforcement rib 25 that extends over the width BF of the guide surface 15 is formed on the top side of the guide plates 10, in the region of the transition to the guide surface 15. At its lateral ends, the reinforcement rib 25 makes a transition, in each instance, into a stiffening rib 26, 27, which extends on the top side of the guide plates 10, along the edge region of the corresponding side segment 23, 24, and the height of which decreases in the direction of the support segment 12.

(22) In the region of the support segment 12, a groove 28 that extends over the width of the support segment 12 is formed in the top side of the guide plates 10. Furthermore, a passage opening 29 that leads from the top side to the underside of the guide plates 10 is formed in the guide plate 10 at a central location. In addition, a guide rib 30 that runs in the direction of the support segment 12 is provided on the top side of the guide plates 10, proceeding from the reinforcement rib 25; it is arranged in the center with reference to the width of the guide plates 10 and forms a lateral edge around the passage opening 29.

(23) The groove 28 and the guide rib 30 serve as guide elements, by means of which the orientation of a spring element 31, which is configured as a conventional W-shaped rail clamp and sits on the guide plates 10, in each instance, in the rail attachment point 1 is secured. The spring elements 31 are supported in known manner with their holder arms, on the side of the rail foot SF that is assigned to them, in each instance, and are braced against the railroad tie 2 by means of a conventional railroad tie screw 32, in each instance. For this purpose, the railroad tie screws 32 are passed through the center loop of the spring element 31 and the passage opening 29, in a dowel, not shown here, embedded in the railroad tie 2, in each instance, and are supported against the center loop of the spring element 31 with their screw heads. For electrical insulation, an insulation element 33 known for this purpose from the state of the art can also be arranged between the holder arms of the spring elements 31 and the rail foot SF, in each instance.

(24) If lengthening of the rail S occurs as the result of heat expansion caused by high outdoor temperatures, the guide plates 10 counter a sideways movement of the rail S with a resistance that is clearly increased as compared with conventional guide plates. This resistance is achieved by means of the width of the guide segments 14, which goes as far as the width BB of the contact surface 4 of the railroad tie 2, the correspondingly increased width BF of the guide surface 15, as well as the correspondingly increased lever effect with which the guide plates 10 can act against a lateral force that proceeds from the rail S about a vertical axis set up perpendicular to the contact surface 4. The great resistance to twisting is supported by means of the great rigidity that is guaranteed for the guide plates 10 on the basis of their lateral reinforcement by the stiffening ribs 26, 27. In this regard, the latch projections 20, 21 ensure that proper contact between rail S and guide plates 10 is still guaranteed even if the rail S is strained due to the rail attachment undertaken in the rail attachment point 1, or if the rail S is twisted about its longitudinal axis as the result of heat expansion.

REFERENCE SYMBOLS

(25) 1 rail attachment point 2 railroad tie 3 top side of the railroad tie 2 3, 3 longitudinal sides of the railroad tie 2 4 contact surface of the railroad tie 2 5, 6 shoulders of the railroad tie 2 7, 8 grooves of the railroad tie 2 9 elastic intermediate layer 10 guide plates 11 angle-shaped step of the guide plates 10 12 support segment of the guide plates 10 13 support surface of the guide plates 10 14 guide segment of the guide plates 10 15 guide surface of the guide plates 10 15a, 15b corner regions of the guide surface 15 16, 17 longitudinal sides of the rail foot SF 18, 19 end segments of the guide segment 14 of the guide plates 10 20, 21 latch projections of the guide plates 10 22 slanted surface of the latch projections 20, 21 23, 24 reinforced side segments of the guide plates 10 25 reinforcement rib 26, 27 stiffening ribs 28 groove of the guide plates 29 passage opening of the guide plates 10 30 guide rib 31 spring elements (W-shaped rail clamps) 32 railroad tie screws 33 insulation elements angle enclosed between the slanted surface 22 and plumb line to the guide surface 15 BA distance between the latch projections BB width of the railroad tie 2 BF width of the guide surface 15 BS width of the support surface 13 HR maximum height of the latch projections 20, 21 HF maximum height of the guide surface 15 S rail SF rail foot of the rail S SR direction of gravity LB longitudinal direction of the railroad tie 2 LF longitudinal axis of the guide plates 10 LK, LK edges between the longitudinal sides 3, 3 and the top side 3 of the railroad tie 2 LS longitudinal expanse of the rail S UF underside of the rail foot SF