EP3047070B1 - Electrically isolating tie-plate for fastening rails - Google Patents

Description

The invention relates to a plate element for a fastening point, in which a rail provided for rail vehicles is mounted on a solid surface, wherein the plate member has one of its the rail to be fastened upper side leading to its subsurface associated through-opening through which in use Fastening element for fixing the plate element is guided on the ground, which engages in a recessed into the ground dowel.

Likewise, the invention relates to a fastening point formed using a plate element of the type mentioned above, in which a rail for rail vehicles is mounted on a solid surface.

Plate elements of the type in question are typically so-called "guide plates" or so-called "shims".

Guide plates are used in rail fastening systems of the type in question here for lateral guidance of to be fastened rail and to intercept and dissipate shear forces that occur when crossing the rail by a rail vehicle. At the same time spring elements, so-called "clamps" or the like are supported and guided on the guide plates usually provide the required for holding down the rail to be fastened resiliently retaining force. The guide plates can be designed as so-called "angled guide plates" in which on the subsurface associated underside an angular cross-section paragraph is formed, which sits positively in use in a correspondingly shaped, introduced into the ground recess in use and so optimal derivation of the Operation occurring loads ensured in the ground.

On the other hand, shims are used in systems for fastening rails for rail vehicles on the one hand to support the other components of the respective fastening system over a large area on the respective substrate. On the other hand, these shims are used to regulate the height at which the rail is held above the respective ground. In this way, deviations of the height level between two adjacent attachment points that exceed a tolerance range can be compensated in the respective attachment point. For this purpose, differently thick or two or more shims stacked on each other can be pushed under the respective rail.

Among the shims include so-called "ribbed plates", on which the rail to be fastened associated upper side two parallel to each other and in a width corresponding to the foot of the rail spaced ribs are formed, on which the rail to be fastened is guided laterally in use.

The anchoring of the respective plate element on the solid ground is usually carried out by means of conventional sleeper screws, bolts or nails, which are screwed or driven into a recessed into the substrate plastic dowels.

Optimally, the plastic dowel is aligned so that its upper edge surrounding its dowel opening is aligned substantially flush with the contact surface of the substrate on which the rail to be fastened and the respective parts of the fastening system are supported. However, practical experience shows that such a perfect orientation can hardly be guaranteed in practice with the necessary reliability. Therefore, one has begun to form a circumferential shoulder in the region of the mouth of the passage opening of the plate element assigned to the substrate of the plate element. In the space created by the paragraph engages with ready mounted mounting point of the respective dowel with its plate element associated upper edge, when this edge region protrudes beyond the footprint of the ground on which the plate member sits in use.

In modern railway tracks, the rails, which are usually made of conductive steel material, are used for signal transmission and the like. This sets one optimal electrical isolation from the ground ahead. Practical experience here shows that despite time-consuming efforts to separate the rail to be fastened by means of suitable adapters or the like from the ground, again and again comes to electrical bridges between the substrate and rail, which remain maintained for a long time.

In addition to the above-described prior art is from the DE 40 34 032 A1 a system for fastening a rail for rail vehicles, in which an angled guide plate is provided, which is supported on a substrate formed by a threshold. Between the angle guide plate and the substrate a thin insulating layer is arranged. Angle guide plate and insulating layer have a passage opening through which a sleeper screw is guided in a recessed into the ground dowel. Between the dowel and the insulating layer is loosely seated a sealing ring which engages with a circumferential collar in the dowel opening and, moreover, acts against the front edge surrounding the upper edge of the dowel and the edge surrounding the passage opening at the bottom of the insulating layer.

From the FR 78 981 E Finally, a rail fastening point is also known, in which a thin layer of elastic material between the rail and the rail supporting the base is arranged. The elastic layer stands laterally beyond the rail foot, so that the spring elements provided for holding down the rail are also supported on it. In each case, a passage opening in the elastic layer introduced, through which a provided for tensioning the respective spring element screw is guided in a recessed into the ground dowel. The elastic layer has, in the region of its passage openings, in each case a circumferential shoulder projecting into a recess formed in the substrate.

Against the background of the prior art described above, the object of the invention was to provide a plate element for a fastening point, in which a rail for a rail vehicle is mounted on a solid surface, which ensures optimum electrical insulation even under unfavorable conditions of use is. Likewise, a correspondingly created attachment point should be specified.

With respect to the plate member, this object has been achieved according to the invention by a plate member having the features specified in claim 1.

A solving the above object fixing point for a rail according to the invention comprises at least the components specified in claim 13.

Advantageous embodiments of the invention are specified in the dependent claims and are explained below as the general inventive concept in detail.

A plate element according to the invention for a system for fastening rails provided for rail vehicles on a solid base has one of its components in accordance with the prior art explained in the introduction the top of the rail to be fastened associated with its base associated with the underside leading through opening, through which a fastener for fixing the plate member is guided in use on the ground, which engages in a recessed into the ground dowel.

According to the invention, a ring element made of an elastically yielding material now sits in the mouth of the passage opening assigned to the substrate.

According to the invention, therefore, the region of the plate element, by which, in use, a fastening point formed using a plate element according to the invention engages the fastening element used in each case for fastening the plate element to the substrate is surrounded by an elastic ring element. This invention elastic ring element forms a barrier that prevents the ingress of moisture into the coupling region in which meet in an attachment point of the invention, the substrate, the recessed into the ground dowels and the plate element. In this way, even with an inaccurate alignment of the individual components of an attachment point according to the invention, an electrical contact between the substrate and the fastening element is prevented.

As fastening elements, the threshold screws, bolts, wedges, nails or the like conventionally used for this purpose can be used in an attachment point according to the invention.

The invention is based on the recognition that collects in conventional plate elements, which are used for rail fasteners, water or other conductive liquids in the region of the passage opening of the plate member, in which case, in particular, such moisture is problematic, coming from the ground due to capillary action rises in the through hole when in use in the through hole, a fastener is inserted and only a thin gap between the passage opening bounding inner surface and the peripheral surface of the fastener remains, or passes from the top of the plate member forth in the through hole. By the invention, a passage of moisture through the passage opening is prevented by a barrier is established by means of the elastic ring member.

By virtue of its inherent elasticity, the ring element provided according to the invention on the plate element rests either on the fastening element screwed into or driven into the anchor or on the anchor itself during use. In this way, the through-hole is protected against ingress of water even if, in a rail fastening system mounted using a panel member according to the invention, the associated dowel is not perfectly aligned with respect to the footprint of the ground on which the rail fastening system is erected.

The inventively provided ring element is attached to the plate member that it is present at the time of installation, ie not, such as a Sealant must be applied before placing the plate member on the substrate or the plate member, but is brought from the plate member. In this way, a very simple assembly is possible.

The elastic ring element is in this case mounted so that a dowel projecting beyond the substrate in the respective attachment point presses against the elastic element in use with its upper edge projecting beyond the substrate, thus producing a seal which ensures an electrical connection between the respective substrate, in which the dowel is embedded, and prevents the fastener, which is inserted through the through hole and screwed into the dowel to fix the plate member on the ground.

In order to fulfill its sealing function, a ring element according to the invention is elastic at least in an axial direction or circumferentially aligned parallel to the longitudinal axis of the passage opening of the plate element, whereby, depending on the respective configuration of the ring element, an optimum benefit can be obtained if the ring element is in all Spatial directions is elastic.

In the event that the ring element is elastically yielding in the circumferential direction, the sealing of the coupling point at which meet the dowel, the fastener, the substrate and the plate element in an attachment point according to the invention, can be optimized by the clear width of the ring opening of the ring element is smaller than the clear width of the Through opening in the region of the mouth in which the ring element is seated.

In order to achieve a secure seal even with anchors whose upper edge region is arranged below the level of the contact surface of the ground, it may be expedient if the ring element protrudes in the unmounted state on the underside of the plate member. As a result, the ring member is compressed during assembly on the respective substrate to the extent that it protrudes in the unassembled state on the underside of the plate member, with the result that formed in this way a barrier against the passage of moisture through the ring member is, which then presses elastically yielding against the ground.

An optimal sealing of the passage opening against the passage of moisture can of course be achieved in that the ring element in use elastically yielding against each guided through the through-hole fastener and on the other hand also elastically yielding against the ground or the upper edge of the respective associated dowel suppressed.

The ring element provided according to the invention for sealing the passage opening of the plate element may in principle consist of any elastic material which, on the one hand, has sufficient resistance under the conditions occurring in practical use and, on the other hand, is sufficiently permanently elastic. In question come to rubber materials, such as for example Manufacture of sealing rings used in pipeline construction are used, and the like. Also, the ring member may be composed of a closed-cell foam, EPDM (ethylene-propylene-diene rubber), PUR (polyurethane), NBR (nitrile-butadiene rubber), a thermoplastic elastomer such as TPE or TPU, and the like.

As already mentioned, a plate element according to the invention may be a guide plate, which typically has an abutment face on the face side with which it rests laterally on the foot of the rail to be fastened in use.

Likewise, a panel element according to the invention may be a shim plate which, in use, is arranged at least in sections under the foot of the rail to be fastened. This includes, as also mentioned above, also ribbed plates and the like.

If, in a plate element according to the invention, the ring element is intended to act against a peripheral surface of the guided through the through-hole fastener in use, it may be useful to increase the reliability of the seal when the ring member carries at its ring opening limiting inner peripheral surface a sealing lip which in use close to the Shaft of the relevant fastener is applied.

It goes without saying that the ring element can be designed to be elastic in the circumferential direction or in its height direction, with a combination of these properties leading to optimum sealing effect. In principle, it is expedient to arrange an elastic element in accordance with the invention independently of the geometric conditions in the respective opening region of the passage opening of the plate element.

The mounting of a ring element according to the invention at its location associated with the plate element can be simplified if in the region of the mouth of the passage opening in which the ring member is seated, a circumferential shoulder is formed, on which the ring element is supported.

It may be expedient here if the ring element sits in a form-fitting manner in the region of the mouth of the passage opening assigned to it.

The seat of the ring element in the mouth of the associated passage opening can thereby be secured by the fact that the ring element is held non-positively in its associated region of the mouth of the passage opening. For this purpose, the optionally positive and non-positive connection may be formed, for example, as a clip, latching or press connection. In particular, in the case of a latching connection, this can be designed so that it can be solved, for example, in the context of maintenance or renovation work, for replacement of the ring element, so that the ring element replaced by a new similar element and the plate element again receives a new sealing function.

Alternatively or additionally, it may be expedient to glue the ring element in the mouth of the passage opening or in another way cohesively connect. In the case where the plate element essentially consists of plastic, this includes the possibility of injecting the ring element against the plate element, so that an insoluble one-piece composite of ring element and plate element is formed.

If the plate element of the type according to the invention is a guide plate which laterally acts with its contact surface in mounting position against the foot of the rail to be fastened, such a plate element is typically used in a rail fastening point which is typically on a concrete sleeper or plate formed solid base is built and adjacent to the respective plate member a supported on the plate member spring element which generates at least one retaining arm for holding down the respective rail to be fastened elastic hold down force, a recessed into the ground dowel, which is aligned with the passage opening of the plate member , And a fastener comprises, which is guided through the associated opening of the plate member and screwed into the dowel to clamp the spring element and the position of the plate member relative to the Untergrun d to fix, wherein the elastically yielding ring member of the plate member with the inner peripheral surfaces of its annular opening rests tightly against the peripheral surface of the fastener or is compressed in a direction parallel to the longitudinal axis of the passage opening direction that it acts with a contact pressure against the ground.

When the plate element according to the invention is a shim plate, such a plate element is typically used in a rail fastening point which is erected on a solid base, also typically formed by a concrete sleeper or plate, and adjacent to the respective plate element a guide plate supported on the plate element, which acts laterally with its contact surface against the rail of the rail to be fastened and at the same time fixed to the plate member in a direction transverse to the rail direction, a supported on the guide plate spring element with at least one support arm required for holding down each rail to be fastened elastic Hold-down force generated, a recessed into the ground dowel, which is aligned with the passage opening of the plate member, as well as a fastening element, which by the associated opening of the Pla guided and is screwed into the dowel to clamp the spring element and to fix the position of the plate member relative to the ground, the elastically resilient ring member of the plate member with the inner peripheral surfaces of its ring opening tightly against the peripheral surface of the fastener or so in a parallel to the Longitudinal axis of the passage opening oriented direction is compressed, that it acts with a contact pressure against the ground.

Is it in the plate element according to the invention is a ribbed plate, on whose upper side at least one rib is formed, on which the foot of the to be fastened Rail is guided in the assembled position, such a plate member is typically used in a rail fastening point, which is erected on a solid support typically formed by a concrete sleeper or plate and adjacent to the respective plate member a supported on the plate member spring element, the at least one support arm to hold down the respectively required to be fastened rail elastic hold-down force generated, embedded in the underground dowel, which is aligned with the passage opening of the plate member, and a fastener which is guided by the associated opening of the plate member and screwed into the dowel to to clamp the spring element and to fix the position of the plate member relative to the ground, wherein the elastically yielding ring member of the plate member with the inner peripheral surfaces of its annular opening close to the peripheral surface de s fastener is present or so compressed in a direction parallel to the longitudinal axis of the passage opening direction that it acts with a contact pressure against the ground.

Fig. 1

ein als Unterlegplatte ausgebildetes Plattenelement in einer perspektivischen Ansicht;

Fig. 2

einen Ausschnitt des Plattenelements gemäß Fig. 1 in einer perspektivischen Sicht auf dessen Unterseite;

Fig. 3

das Plattenelement gemäß Fig. 1 in einem Schnitt entlang der in Fig. 2 eingezeichneten Schnittlinie X-X;

Fig. 4

ein bei dem Plattenelement gemäß Fig. 1 vorgesehenes elastisches Ringelement im Längsschnitt;

Fig. 5

das Ringelement gemäß Fig. 4 in einer perspektivischen Ansicht;

Fig. 6

ein unter Verwendung des Plattenelements gemäß Fig. 1 aufgebautes System zur Befestigung einer Schiene für ein Schienenfahrzeug auf einem Untergrund;

Fig. 7

eine alternative Ausführung eines elastischen Ringelements im Längsschnitt;

Fig. 8

das Ringelement gemäß Fig. 7 in einer perspektivischen Ansicht.

The invention will be explained in more detail by means of exemplary embodiments. Each show schematically:

Fig. 1

a trained as a shim plate element in a perspective view;

Fig. 2

a section of the plate element according to Fig. 1 in a perspective view on the underside thereof;

Fig. 3

the plate element according to Fig. 1 in a section along the in Fig. 2 drawn section line XX;

Fig. 4

a in the plate member according to Fig. 1 provided elastic ring element in longitudinal section;

Fig. 5

the ring element according to Fig. 4 in a perspective view;

Fig. 6

a using the plate member according to Fig. 1 constructed system for mounting a rail for a rail vehicle on a substrate;

Fig. 7

an alternative embodiment of an elastic ring member in longitudinal section;

Fig. 8

the ring element according to Fig. 7 in a perspective view.

Trained as a shim plate element 1 is part of a rail fastening system, as for example in the German patent application 10 2013 102 531.5 and claiming priority of this application filed Chinese utility model 201320209968.6 is described. The contents of the German patent application and the Chinese utility model are hereby incorporated by reference for the purposes of supplemental explanation in the disclosure of the present application.

The plate element 1 has a flat underside 2 and an upper side 3 aligned parallel thereto. In the lateral end portions of the plate member 1, two through holes 4, 5 are formed, each leading from the upper side 3 to the lower side 2. The passage openings 4, 5 are arranged at a distance such that one of them in the assembly position sits laterally to the foot of the rail (not shown here) to be supported on the upper side 3 of the plate element 1.

Like from the Figures 2 and 3 can be seen, in the area 6, in which the circular cross-section through openings 4.5 each open on the bottom 2 of the plate member 1, a circumferential shoulder 7 is formed. In the base of paragraph 7, two slot-shaped grooves 7a, 7b are additionally formed opposite each other, which are arranged at a small distance from the respective through hole 4.5 and extend axially parallel to the longitudinal axis L of the respective through hole 4.5. The grooves 7a, 7b form the movement spaces for one associated, projecting beyond the top 3 of the plate member 1, integrally formed on the plate member 1 arm 1a, 1b, 1a ', 1b' on the one hand the respective opening 5.6 in Area of the grooves 7a, 7b limited and on the other hand at its free ends notches 1c, 1d carries.

On the shoulder 7 sits in each case a ring element 8a, 8b which is made for example of a rubber-like, elastically yielding material. The height H of the respective ring element 8a, 8b, measured in the direction of the longitudinal direction L of the through-openings 4.5, is dimensioned such that the ring element 8a, 8b is in the unloaded state (FIG. Fig. 2 ) protrudes beyond the underside 2 of the plate element 1. In this case, in this state, the diameter of the annular opening 9 delimited by the ring element 8a, 8b corresponds to the diameter of the respective passage opening 4, 5.

At its the underside 2 of the plate member 1 associated end face 8c are two concentrically arranged and by a web against each other, against the ring opening 9 and the outer peripheral side delimited circumferential grooves 8c, 8d formed by the elasticity of the ring elements 8a, 8b additionally reinforced in the area is, with which the ring elements 8a, 8b act in use against the contact surface 10 of a substrate 11, on which the plate member 1 sits in use.

On their side opposite the grooves 8c, 8d, the ring elements 8a, 8b each have a projection 8e, 8f, the shape of which is in each case adjusted with a slight oversize to the slot-shaped grooves 7a, 7b. For attachment, the projections 8e, 8f of the ring elements 8a, 8b are pressed into the associated grooves 7a, 7b until the respective ring element 8a, 8b sits on the shoulder 7 assigned to it. Due to the inherent elasticity of the material of the respectively integrally formed ring elements 8a, 8b, the projections 8e, 8f are slightly compressed so that they are positively and non-positively engaged in the respective groove 7a, 7b when finished in the mouth region 6 of the respective through hole 4, 5 sit and the respective ring member 8a, 8b is held on the plate member 1.

For mounting an attachment point B for a conventional rail S for a rail vehicle, the plate element 1 is placed with its underside 2 on the support surface 10 of the solid substrate 11 formed for example by a concrete sleeper or concrete slab. In the substrate 11 dowels 12,13 are inserted, which are aligned in alignment with their respective associated through hole 4.5.

If the dowels 12,13 are properly aligned exactly so that their upper edges, which define the respective dowel opening, are aligned flush with the contact surface 10 of the substrate 11, the ring elements 8a, 8b sit on the edge surrounding the respective dowels 12,13 If, on the other hand, one of the dowels 12, 13 projects with its upper edge beyond the contact surface 10, the respective ring element 8a, 8b presses against this edge.

Regardless of how the contact comes to conditions, the ring element 8a, 8b is so compressed during assembly due to the dimensioning of its height H, that it with a certain pressure against the respective abutment "edge region of the substrate 11" or "upper edge of the respective dowel 12,13 "This pressure is sufficient to prevent penetration of the contact area by moisture.

Along with the compression due to the contact with the substrate 11 or the upper dowel edge, the elastic material of the ring elements 8a, 8b deviates in the direction of the respective annular opening 9, so that the ring elements 8a, 8b with their inner surfaces bounding the respective annular opening with slight pressure press against the peripheral surfaces of serving as fasteners sleeper screws 14,15, of which one through one of the through holes 4,5, inserted and screwed into the respectively associated dowel 12,13 to each clamp a tension clamp 16,17, the to hold down required elastic hold down force to produce. In this way, a double sealing effect is effected by the ring elements 8a, 8b.

The tensioning clamps 16, 17 each sit on a guide plate 18, 19, which in each case sit on one of the side of the foot F of the rail S projecting portion of the plate member 1 and bear with their rail F associated end face contact surface laterally on the rail foot F. In this case, the guide plates 18,19 each have a passage opening which is aligned in alignment with the associated passage opening 4,5 and through which the respectively associated fastening element 14,15 is inserted.

For assembly, the plate element 1 has been provided with pre-mounted on him guide plates 18,19. For this purpose, the arms engage 1a, 1b, 1a ', 1b' of the plate member 1 through the through holes of their respective associated guide plates 18,19 and lock with their notches 1c, 1d with the upper peripheral edge, which limits the passage opening of the respective guide plate 18,19 , In this way, the guide plates 18,19 are positively held releasably attached to the plate member 1 and can be placed together with him as a unit on the support surface 10.

In the FIGS. 7 and 8 an alternative embodiment of a ring member 20 is shown, which can be used in place of the ring elements 8a, 8b. The like the ring elements 8a, 8b integrally made of an elastically resilient, electrically non-conductive plastic material ring member 20 is formed in the manner of a sleeve with a cylindrical sleeve body 21 and has on its outer peripheral surface detent-like circumferential projections 22. In addition, a hat-like circumferential collar 23 is integrally formed on one end face. The collar 23 is slightly bulged, so that its free end face 24 protrudes slightly beyond the edge, which limits the mouth of the ring opening 25 of the ring member 20 in the region of the collar 22.

For assembly, a ring member 20 is pressed with its sleeve body 21 in one of the through holes 4.5 of the plate member 1 until the collar 23 of each ring member 20 sits on the shoulder 7 of the associated through hole 4.5. In this case, the projections 22 are elastically deformed, so that the respective ring element 20 after pressing in and form Friction is also positively held in the respective through hole 4.5.

The thickness of the collar 23 and its bulge are chosen so that the collar 23 is elastically compressed when placing the plate member 1 on the support surface 23 and so a secure seal between the plate member 1 and the substrate 11 in the region of the mouth 6 of the respective passage opening 4,5 guaranteed. At the same time, the ring element 20 bears tightly against the inner surface of its annular opening 25 on the circumferential surface of the fastening element 14, which is guided through the annular opening 25 when the mounting point B is completely assembled, so that here further protection against the passage of moisture and the formation of electrically conductive bridges is formed.

REFERENCE NUMBERS

1

panel member

1a, 1b

poor

1a ', 1b'

poor

1c, 1d

Resting the arms 1a, 1b

2

flat bottom of the plate element. 1

3

flat top of the plate element. 1

4.5

Through openings of the plate element. 1

6

Area in which the through-openings 4,5 respectively open on the underside 2 of the plate element 1,

7

paragraph

7a, 7b

groove

8a, 8b

ring elements

8c, 8d

groove

8e, 8f

projections

9

ring opening

10

footprint

11

underground

12.13

dowel

14.15

Sleeper screws (fastener)

16.17

clamps

18.19

guide plates

20

ring element

21

Sleeve body of the ring member 20th

22

Projections of the ring member 20th

23

Collar of the ring member 20th

24

free front of the collar 23

25

Ring opening of the ring element 20th

B

attachment point

F

Foot of the rail S

H

Height of the respective ring element 8a, 8b

L

Longitudinal direction / longitudinal axis of the through openings 4.5

S

rail

Claims (13)

1. Plate element for a fastening point in which a rail (S) provided for rail vehicles is fastened to a base (11), wherein the plate element (1) has an opening (4, 5) leading from its upper side (3) associated with the rail to be fastened to its underside (2) associated with the base (11), through which a fastening element (14, 15) for fastening the plate element (1) onto the base (11) is guided during use, which engages with an anchor fitting (12, 13) countersunk into the base (11), characterised in that a ring element (8a, 8b; 20) made from a flexibly resilient material secured in a form-, force- or material-locking fashion to the plate element (1) sits in the mouth of the opening (4, 5) associated with the base (11) .
2. Plate element according to claim 1, characterised in that the ring element (8a, 8b; 20) is designed to be flexible in a circumferential direction.
3. Plate element according to claim 2, characterised in that the ring element (8a, 8b; 20) has a ring opening (9), whose inside diameter is smaller than the inside diameter of the opening (4, 5) in the region (6) of the mouth in which the ring element (8a, 8b; 20) sits.
4. Plate element according to any one of the preceding claims characterised in that the ring element (8a, 8b; 20) is flexibly resilient in a direction parallel to the longitudinal axis (L) of the opening (4, 5).
5. Plate element according to claim 4, characterised in that the ring element (8a, 8b; 20) protrudes beyond the underside (2) of the plate element (1) in an unmounted plate element (1).
6. Plate element according to any one of the preceding claims, characterised in that the plate element (1) is a guide plate, which has a contact surface on the face side, which rests on the side of the foot (F) of the rail (S) to be fastened during use.
7. Plate element according any one of claims 1 to 5, characterised in that the plate element is a base plate, which is arranged at least in sections under the foot (F) of the rail (S) to be fastened during use.
8. Plate element according to any one of the preceding claims characterised in that the ring element (8a, 8b; 20) incorporates a sealing lip on its inner peripheral surface defining its ring opening (9). Said sealing lip rests tightly against the shaft of the fastening element (14, 15) during use.
9. Plate element according to any one of the preceding claims, characterised in that a revolving shoulder is moulded into the region (6) of the mouth of the opening (4, 5) in which the ring element (8a, 8b; 20) sits, on which shoulder the ring element (8a, 8b; 20) is supported.
10. Plate element according to any one of the preceding claims, characterised in that the ring element (8a, 8b; 20) is held in the region (6) of the mouth of the opening (4, 5) in a force-locking fashion and is locked into place with the plate element in a separable manner.
11. Plate element according to any one of claims 1 to 10, characterised in that it is made of a synthetic material and the ring element (8a, 8b; 20) is firmly bonded to the plate element.
12. Plate element according to claim 11, characterised in that the ring element (8a, 8b; 20) is injection moulded onto the plate element (1).
13. Fastening point at which a rail for a rail vehicle is fastened to a fixed base, comprising a plate element (1) configured according to any one of claims 1 to 12, an anchor fitting (12, 13) countersunk into the base (11), and a fastening element (14, 15) guided through an opening (4, 5) of the plate element (1) and screwed into the anchor fitting (12, 13) in order to fasten the plate element (1) to the base (11).

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