DE202008014249U1 - System for securing a rail to a substrate - Google Patents

Abstract

The invention relates to a system for attaching a rail S to a substrate U, the system having a nut (7) which can be screwed onto the threaded segment (32) of the stud bolt (5) and which works on the central loop (14) of the tension clamp (3) to tension the tension clamp (3) against the substrate (U). Such a system according to the invention can be cost-effectively produced and easily assembled because the nut (7) has an extension on its underside (U) in the shape of an annular section (29) which abuts the inner sides of the side pieces (15, 16) of the central loop (14) in the space (17) laterally bordering the side pieces (15, 16) of the central loop (14) in a gripping and form-locking manner, and the nut has an inner threading (30) which fits to the threading of the stud bolt (5) threaded segment (32).

Description

The The invention relates to a system for securing a rail on a Underground, the one with completely assembled system in the underground fastened bolt having a threaded portion owns, which when fastened in the ground screw freely over the top of the subsoil protrudes.

systems This type, for example, to attach a rail a substrate formed by concrete slabs or concrete sleepers used. Such substrates made of unyielding materials will be also as "solid Roadway ".

firm Roadways are in the area of high-speed passenger traffic and heavy freight traffic enforced because they provide a particularly precise and secure attachment allow the rail. At the same time, the burden of the rail be set in a comparably simple way, that a optimum life is achieved. For example, through Arrangement of an elastic intermediate layer between the rail and the amount to be set exactly to the respective subsoil the rail when crossing lowered by a rail vehicle. The rail fastening system used in each case On the one hand, the task of doing so comes with the rail with one Lift off to securely hold down preventive force. On the other hand supports the Rail fastening the rail against the lateral forces from when driving over the rail occur in each attachment point.

by virtue of the big Number of fasteners needed to fasten a rail Rail fixings here in Speech kind of not only the safely withstand loads occurring in practical operation, but also inexpensive be produced and easy to mount.

One particularly simple designed rail fastening system is under the term "system RN " comprises a spring element integrally formed in the manner of a leaf spring, that has a spring portion and a support portion which um one transverse to the longitudinal axis the spring element directed axis is bent so far that he rests against the underside of the spring section. The spring section is longer as the support section, so that it protrudes freely with one end section over the support section.

in the fully assembled state is the end section in question the foot of the to be fastened, over an elastic layer on the solid underground rail and practice a resilient, directed against the solid ground Spring force off. The required bias of the spring element This is achieved by the fact that in the solid ground, a bolt is screwed through the in the spring section and the support section Molded through holes guided is, and on the bolt a nut is screwed, which over a Washer on the upper side facing away from the solid surface the spring element acts. At the same time the spring element lies with its bending portion, in which the support portion of the spring portion bent in a groove formed in the solid ground, which extends parallel to the rail to be fastened. To this Way is the spring element against an unwanted change in position be assured.

Of the Advantage of the above Fastening system is that with him very few and very simple shaped components for securing a rail needed become. However, practical experience shows that these components in the practice of a modern high-speed or Heavy goods traffic are no longer able to cope. For example, the bolt is subjected to high transverse forces, the a rapidly progressive wear in the area of the through holes cause the spring element and a fracture of the bolt to lead can. Also results under these loads in the area of the position assurance forming groove an elevated abrasive Wear, as a result, even after a relatively short period of use of the proper anti-rotation Seat of the spring element can no longer be guaranteed.

One Another rail fastening system of the type mentioned is as published by the Applicant Brochure "Rail fastening systems for concrete sleepers system W14 "also explained In this system, the rail to be fastened is over elastic intermediate layer directly on the firm ground. Laterally the rail is guided by angled guide plates, the in pairs between them a track-accurate rail channel form, in which the respective rail sits. The forces introduced via the rail are transmitted via the Angled guide plate passed directly into the underground supporting the rail. Is to at the respective underground for each of the angled guide plates a shoulder formed at the associated angle guide plate supported is.

In the W14 system, a W-shaped tension clamp is mounted on the angle guide plate, which presses in the assembled state with the free end portions of their spring arms on the free top of the rail of the rail to be fastened. At one of their free end section respectively opposite, curved and supported on the angled guide plate support section go the spring arms of the tension clamp in a middle loop, which is braced by means of a clamping screw against the solid ground. The U-shaped middle loop of the clamp surrounds the clamping screw. Their legs are designed so that the tension clamp with pre-assembled, a reduced contact force exerting clamping screw from a pre-assembly in which the free end portions of the spring arms of the tension clamp on a parallel to the rail to be mounted extending rib and its support sections on one of the respective Sitting shoulder of the solid surface associated area, can be pushed into the mounting position, in which the spring arms act on the rail and sitting the support portions of the tension clamp in a molded into the angled guide plate, usually grooved recess.

Of the Advantage of on an angle guide plate based concept of rail fastening system W14 and more comparable Systems is that the clamping screw required for clamping the tension clamp largely free of lateral forces can be kept so that with little wear and minimal Risk of breakage ensures a permanently secure support of the rail is. The disadvantage, however, is that in the known system used tension clamp a compared with the system RN large space needed and the clamping screw a big one Length needed to to be able to tension the tension clamp with simple assembly. Also is it for the proper function of the system W1 and similar built-up systems required that on the solid underground one support shoulder each is trained over the from the angled guide plate absorbed shear forces be directed into the solid underground.

In front This background resulted in the task of producing a cost-effective Rail fastening system to create that easy to assemble lets and with minimized installation space supplies permanently higher retention forces as this is the case for example with the system RN.

These Task is inventively by a according to claim 1 designed system has been solved for securing a rail. Advantageous embodiments of this system are in the claim to claim 1 back claims specified.

One inventive system for securing a rail to a ground comprises in accordance with the prior art in a fully assembled system in the underground fastened bolts. This has a threaded portion on, with the bolt fastened in the underground freely over the Protrudes from the top of the ground.

simultaneously comprises a system according to the invention one piece shaped tension clamp, which has a middle loop and at least one Having connected to the middle loop spring arm, wherein the Middle loop two parallel spaced apart Thighs, which confine a space between them, in which assembled system of the threaded portion of the bolt is arranged. This spring arm practices in fully assembled system with its associated with the rail free end portion a resilient hold down force on the foot of the fixing rail.

Finally includes the system according to the invention also a nut on the threaded portion of the bolt can be screwed on and in the assembled system on the middle loop of the The tension clamp acts to clamp the tension clamp against the ground.

According to the invention now this mother assigned to her the middle loop of the tension clamp Underside an extension on. This extension has the shape of a circumferential heel, which when fully assembled System in the space bounded laterally by the thighs of the middle loop engages and thereby positively on the inner sides of the legs of the middle loop is applied. simultaneously The circumferential shoulder has an internal thread that matches the thread adapted to the threaded portion of the bolt.

By according to the invention at the provided for clamping the tension clamp nut provided extension paragraph on the one hand is the length over which in the assembly of the system according to the invention a force and positive-locking connection between the nut and the threaded portion of the bolt is made to the height of the paragraph opposite extended to a mother, the according to the usual for that Clamping a tension clamp used nuts only with their a flat face optionally over a Washer acts on the middle loop of the tension clamp.

To the another is due to the shape of the thighs of the middle loop the tension clamp adapted shaping of the extension paragraph of an inventively provided Mother ensured that the middle loop also under the high In practical operation occurring loads is always performed safely.

By this design according to the invention Thus, in a system according to the present invention, it is possible to fasten a tensioning clamp shaped according to the pattern of conventional clamps to a bolt which protrudes beyond the upper surface of the fixed ground for a comparatively short distance, on which the rail is to be fastened. Accordingly little height takes a system according to the invention in the fully assembled position to complete.

by virtue of the particular suitability of in a fastening system according to the invention Existing nut, also on a short bolt piece one to ensure secure clamping of the tension clamp, can be the system according to the invention especially using bolts, that of previously existing, for example, replace due to wear Fastening systems come from and should remain in the respective underground.

One particularly secure hold of the tension clamp in the respective mounting position can be achieved by placing in the paragraph of the mother Throat is formed, whose cross-sectional shape so to the shape of the with her coming in contact peripheral surface of the middle loop of the Tension clamp is adapted to the middle loop in the contact area form-fitting attached to the paragraph. For example, if the tension clamp from a curved in cross-section substantially circular wire material, Thus, for this purpose, the cross-sectional shape of the paragraph in the Nut formed throat formed circular arc.

Around a simple assembly with conventional, especially automatic working assembly facilities should allow the mother have a head portion formed on the attack surfaces for a mounting tool are.

By doing the length the leg of the middle loop of the tension clamp and the length of the at least one spring arm of the tension clamp adapted to each other are seen in plan view, the middle loop over the End portion of the spring arm of the tensioning clamp protrudes, it is ensured that the middle loop of the tension clamp in the assembled state over the Rail foot sticks out. In this way, the middle loop as a safeguard against Lifting the rail foot serve.

A secure transmission the applied by the spring arms hold-down force on the rail can thereby be reached, that the end portion of the spring arm in itself known manner is bent in the direction of the middle loop of the tension clamp.

In just as conventional manner can also in a system according to the invention the spring arm of the tension clamp in a support section in the middle loop go over the tension clamp. By doing the support section directed in an arc away from the middle loop of the tension clamp runs and the support section in the same plane as the legs of the middle loop of the Tension clamp, leaves the height Minimize the system when fully assembled.

Especially advantageous the embodiment of the invention then use a fastening system when the tension clamp two spring arms of which one on one leg and the other connected to the other leg of the middle loop of the tension clamp is. In this case, the tension clamp is W-shaped, so that a even load all components of the fastening system is achieved.

A particularly advantageous and practical embodiment of the fastening system according to the invention is characterized in that it is modeled on the state the technique an angle guide plate which is intended to be laid on the ground be, and the on their in assembly position free top guide elements to lead having the tension clamp. Is in the underground on which the rail to be fastened, a corresponding depression exists, can the angle guide plate on its underside associated with the bottom of a projection which is intended to intervene in this depression, so a positive lock the position of the angled guide plate to form in their mounting position. The electrical insulation of the Mounting system can thereby be ensured that the Angled guide plate made of an insulating material. It serves the same purpose when the fastening system according to the invention comprises an insulating element made of an electrically insulating material, a recording for Having the end portion of the at least one spring arm of the tension clamp and is provided between the respective end section and the rail to be fastened.

following The invention will be illustrated with reference to an exemplary embodiments Drawing closer explained. Each show schematically:

1 an attachment of a rail in a view from above;

2 a section through the attachment along the in 1 drawn section line XX;

3 a belonging to a system for fastening the rail nut in side view;

4 the mother in a longitudinal section;

5 the mother in a view from above;

6 a tensioning clamp associated with the system for securing the rail in a view from above;

7 the tension clamp in a cut along the in 6 drawn section line YY.

The attachment B of the rail S on a solid subsoil U formed by a concrete sleeper is of two systems 1 . 2 educated.

Each of the systems 1 . 2 for fastening the rail S comprises a tension clamp 3 , an angle guide plate 4 , a bolt 5 , an insulation device 6 and one on the bolt 5 screwed nut 7 ,

The angle guide plate 4 is made of a non-electrically conductive plastic material and each has a passage opening for the bolt 5 on. On its the solid ground U associated bottom has the angle guide plate 4 a lead 8th on, which is parallel to the rail foot 9 adjacent contact surface 10 the angled guide plate 4 and thus extends parallel to the rail S. The shape of the projection 8th is to the shape of a groove 11 adapted to the angled guide plate 4 associated top 12 the solid underground U is formed. In this way, the projection takes hold 8th the angled guide plate 4 positively in the groove 11 so that they are in their mounting position against twisting around on the surface 12 standing pivot axis is secured. At the same time be over the lead 8th the lateral forces are directed into the solid ground, which when passing over the rail S from the angled guide plate 4 be recorded.

On its top are to the angle guide plate 4 guide elements 13 molded, in the fully assembled position, the position of the clamp 3 to back up.

The integrally bent from a spring wire material tension clamp 3 is W-shaped and has an middle loop 14 with two legs extending in parallel 15 . 16 on, a space between them 17 limit. The thigh 15 . 16 are at one end over a bent about 180 ° base section 18 the middle loop 14 connected with each other. At the other end are the thighs 15 . 16 each in a support section 19 . 20 over, which extend in the same plane E as the legs 15 . 16 ,

To the support sections 19 . 20 each includes a spring arm 21 . 22 on, each in a line parallel to the thighs 15 . 16 the middle loop 14 extending arc section 23 . 24 in each case an end section 25 . 26 go over that of the respective arc section 23 . 24 in the direction of the middle section 14 is bent. In finished mounted position, the end sections sit 25 . 26 in each case a receptacle of the plate-shaped made of a non-conductive plastic material insulating device 6 and act through the isolation device 6 on the top of the rail foot 9 ,

The length L1 of the spring arms measured in plan view 21 . 22 is a short distance less than the length L2 of the middle section 14 so that the middle section 14 seen in plan view or side view to a small distance in front of the end portions 25 . 26 stands.

The mother 7 has one with a conventionally shaped external hex 27 provided head section 28 on, on the underside of an extension in the form of a circumferential paragraph 29 is formed. The internal thread 30 mother 7 extends over the entire height of the head section 28 and the paragraph 29 , In the outside of the paragraph 29 is a circumferential throat K formed. The cross-sectional shape of the throat describes a circular arc whose radius Rk the outer radius Ra of the circular cross-section leg 15 . 16 equivalent. At the same time, the smallest diameter D of the paragraph corresponds 29 the smallest distance A of the legs, so that the mother 7 on the middle loop 14 can be put on while form-fitting on the thighs 15 . 16 sitting. The heel seizes 29 in the thighs 15 . 16 laterally limited space 17 ,

In the solid underground U is a plastic dowel 31 let into which the respective bolt 5 is screwed. Each of the bolts 5 has a threaded portion 32 on, with the bolt 5 over the top 11 the solid underground U stands out. The length L3 of the threaded section 32 is so tight that the threaded section 32 not over the respective tension clamp 3 protrudes. The external thread of the threaded section 32 corresponds to the internal thread 30 mother 7 ,

For mounting the systems 1 . 2 is in already in the solid underground U sitting bolts 5 First, the respective angle guide plate 4 put on the solid underground U, so that their lead 8th in the groove assigned to him 11 attacks. The bolts 5 engage with their threaded section 32 through the for them in the angles guide plate 4 molded passage opening. Subsequently, the respective tension clamp 3 on the associated angle guide plate 4 placed. The threaded section 32 of the bolt 5 In doing so, take hold of the between the thighs 15 . 16 the middle loop 14 limited space 17 , The end sections sit here 25 . 26 the respective tension clamp 3 in the respective insulating device 6 and are above them on the respective side of the rail foot 9 supported. Subsequently, one mother each 7 on the associated threaded section 32 screwed. At first, the one in the paragraph starts 29 arranged section of the internal thread 30 mother 7 in the external thread of the threaded portion 32 of the bolt 5 , By further tightening the mother 7 then becomes the middle loop 14 against the angle guide plate 4 and thus clamped against the solid surface U. In the finished tensioned state, the positive locking between the middle loop ensures 14 and the paragraph 29 the nut the tension clamp 3 against a lateral displacement. At the same time is the internal thread 30 mother 7 over a sufficient length for the transmission of the clamping force in engagement with the external thread of the threaded portion 32 ,

If necessary, it is also possible to use the systems 1 . 2 pre-assemble. These are the tension clamps 3 each prepositioned in a retracted relative to the rail S position and then the respective mother only so far tightened that the tension clamps 3 held in their pre-assembly. Subsequently, the rail S in the of the angled guide plates 4 laterally limited space can be set. Then then the tension clamps 3 shifted in the direction of the rail S until they have reached their final assembly position and the nuts 7 as far as can be tightened that the clamps 3 exert the required hold-down force on the rail S

1, 2

systems for fastening the rail S

3

tension clamp

4

Angled guide plate

5

bolt

6

insulating

7

mother

8th

head Start

9

rail

10

contact surface

11

groove

12

top

13

guide elements

14

medium loop

15 16

Legs of the middle loop 14

17

from the thighs 15 . 16 laterally limited space

18

Base section of the middle loop 14

19 20

Support section of the middle loop 14

21 22

Spring arms of the middle loop 14

23 24

Arc section of the spring arms 21 . 22

25 26

End portions of the spring arms 21 . 22

27

External hex of the head section 28 mother 7

28

Head section of the mother 7

29

Paragraph of the mother 7

30

Internal thread of the nut 7

31

Plastic anchors

32

Thread portion of the bolt 5

A

smallest distance of the legs 15 . 16 the middle loop 14

B

attachment the rail S

D

smallest diameter of the heel 29

K

in the paragraph 29 molded throat

L1

Length of the spring arms 21 . 22

L2

Length of the middle section 14

L3

Length of the threaded section 32

Ra

Outside radius of the thighs 15 . 16

Rk

radius the throat K

S

rail

U

underground

Claims (15)

System for fastening a rail (S) on a substrate (U), - with a system mounted on it ( 1 . 2 ) in the underground (U) fastened bolts ( 5 ), which has a threaded portion ( 32 ), which in bolted in the ground (U) bolts ( 5 ) freely over the top ( 11 ) of the subsurface (U), - with an integrally formed tension clamp ( 3 ), which has an middle loop ( 14 ) and at least one to the middle loop ( 14 ) connected spring arm ( 21 . 22 ), wherein the middle loop ( 14 ) two parallel with distance (A) extending legs ( 15 . 16 ), which has a space between 17 ), in the case of a fully assembled system ( 1 . 2 ) the threaded portion ( 32 ) of the bolt ( 5 ), and wherein the spring arm ( 21 . 22 ) with completely assembled system ( 1 . 2 ) with its free end portion associated with the rail (S) ( 25 . 26 ) a resilient hold-down force on the foot ( 9 ) of the rail (S) to be fastened, and - with a nut ( 7 ) on the threaded portion ( 32 ) of the bolt ( 5 ) can be screwed on and in the case of a fully assembled system ( 1 . 2 ) on the middle loop ( 14 ) of the tension clamp ( 3 ) acts to tighten the tension clamp ( 3 ) against the ground (U), characterized in that the nut ( 7 ) at its middle loop ( 14 ) of the tension clamp ( 3 ) associated underside (U) one Extension in the form of an encircling paragraph ( 29 ), which in the case of a fully assembled system ( 1 . 2 ) in the of the thighs ( 15 . 16 ) of the middle loop ( 14 ) laterally limited space ( 17 ) gripping positively on the inner sides of the legs ( 15 . 16 ) of the middle loop ( 14 ) and an internal thread ( 30 ), which is connected to the thread of the threaded portion ( 32 ) of the bolt ( 5 ) is adjusted. System according to claim 1, characterized in that the paragraph ( 29 ) mother ( 7 ) a throat (K) is formed whose cross-sectional shape so to the shape of the coming into contact with the peripheral surface of the middle loop ( 14 ) of the tension clamp ( 3 ), that the middle loop ( 14 ) in the contact area in a form-fitting manner on the shoulder ( 29 ) is present. System according to claim 2, characterized in that the tension clamp ( 3 ) is bent from a substantially circular cross-section wire material and the cross-sectional shape of the in the paragraph ( 29 ) mother ( 7 ) formed throat (K) is formed in a circular arc. System according to one of the preceding claims, characterized in that the nut ( 7 ) a head section ( 28 ), are formed on the attack surfaces for an assembly tool. System according to one of the preceding claims, characterized in that the length (L1) of the legs ( 15 . 16 ) of the middle loop ( 14 ) of the tension clamp ( 3 ) and the length (L2) of the at least one spring arm ( 21 . 22 ) of the tension clamp ( 3 ) are adapted to each other so that seen in plan view the middle loop ( 14 ) over the end portion ( 25 . 26 ) of the spring arm ( 21 . 22 ) of the tension clamp ( 3 ) protrudes. System according to one of the preceding claims, characterized in that the end section ( 25 . 26 ) of the spring arm ( 21 . 22 ) in the direction of the middle loop ( 14 ) of the tension clamp ( 3 ) is bent. System according to one of the preceding claims, characterized in that the spring arm ( 21 . 22 ) in a support section ( 19 . 20 ) in the middle loop ( 14 ) of the tension clamp ( 3 ) passes over. System according to claim 7, characterized in that the support section ( 19 . 20 ) in an arc from the middle loop ( 14 ) of the tension clamp ( 3 ) is directed away. System according to claim 8, characterized in that the support section ( 19 . 20 ) lies in the same plane as the legs ( 15 . 16 ) of the middle loop ( 14 ) of the tension clamp ( 3 ). System according to one of the preceding claims, characterized in that the tension clamp ( 3 ) two spring arms ( 21 . 22 ), of which the one to the one leg ( 15 . 16 ) and the other on the other leg ( 16 . 15 ) of the middle loop ( 14 ) of the tension clamp ( 3 ) connected. System according to claim 10, characterized in that the tension clamp ( 3 ) Is W-shaped. System according to one of the preceding claims, characterized in that it has an angle guide plate ( 4 ), which is intended to be placed on the substrate (U), and on its in the assembly position free top guide elements ( 13 ) for guiding the tension clamp ( 3 ) having. System according to claim 12, characterized in that that the angle guide plate on its underside associated with the bottom of a projection which is intended to be formed in a molded into the ground Deepening intervention. System according to one of claims 12 or 13, characterized in that the angle guide plate ( 4 ) consists of an insulating material. System according to one of the preceding claims, characterized in that it comprises an insulating element made of an electrically insulating material ( 6 ), which has a receptacle for the end section ( 25 . 26 ) of the at least one spring arm ( 21 . 22 ) of the tension clamp ( 3 ) and is provided between the end section ( 25 . 26 ) and to be fastened rail (S) to be placed.