EP2426257A1 - Expansion insert for rail nail - Google Patents

Abstract

The spreading insert (4) has two side-pieces connected to each other by a bent and extended parallel to each other. A third side-piece (42) is connected with one of the former side-pieces by another bent (44), where the side-pieces lie in a common plane. The free ends of the former and the third side-pieces are provided with a catching section (47).

Description

TECHNICAL AREA

The invention relates to a spreader insert for rail nails according to the preamble of patent claim 1

STATE OF THE ART

By stressing the railway tracks, the sleeper screws and rail nails loosen. The track and route widths as well as the rail height change. When rehabilitating the tracks, the fixed screw seat is restored by removing the old sleeper screws and drilling out and cleaning the hole. Subsequently, a spreader insert is introduced into this hole. The hole is filled with a potting compound and then a new sleeper screw is screwed in, the spreader insert of the new sleeper screw provides a firm grip. In order to correct the track height, usually before the casting of the hole, a base plate, preferably a Lupolen pad, placed on the threshold.

This method and the use of the spreader insert has now proven itself for many years. The process is known as traversan threshold remediation. The method and the associated spreader insert are also in CH 514,734 described.

For sleeper screws with blunt screws is in CH 514,734 proposed a spreading insert according to FIG. 5 to use, which has the form of a coil spring. For pointed screws, a spreader insert is used FIG. 3 used. This spreader insert has three axially parallel legs, which consist of a one-piece Rod material are bent. A in the installed state of the spreader upper free end is bent substantially horizontally. This bend or pawl should be taken by the screw and serve as an additional screw guide.

In some countries, rail nails are used instead of sleeper screws. Both in the CH 514,734 However, described spreader pads have the disadvantage that when used in combination with a rail nail the pull-out is too small. Under the pull-out resistance, the resistance force is understood against a force with which the rail nail is to be pulled out of the threshold. In addition, it has been found that inserting a rail nail into a bore provided with such a spreader pad is associated with problems because the spreader pad has often forced the nail out of the central axis of the bore.

From the EP 1 449 961 In addition, a spreader insert is known, which is advantageous in connection with screws with blunt screw ends. However, also from the technical teaching of the EP 1 449 961 Similar disadvantages and application for rail nails has proven to be difficult.

PRESENTATION OF THE INVENTION

It is an object of the invention to increase the tensile strength of the assembly and to allow use of rail nails, particularly with a pointed end.

Such a problem is solved by a spreader insert according to claim 1. Accordingly, a spreader insert for rail nails has two first and second legs connected to one another at least approximately parallel to one another and a third leg connected to the second leg via a second arch. The first leg and the second leg lie in a common first plane and the third leg lies in a second plane which is substantially perpendicular to the first plane.

As a result, a spreading insert can be created in which all three legs come to lie in the region of the surface of the bore in the threshold, thus the Cross-section of the bore with inserted spreader insert is only minimally reduced, which allows easy Eintreben the rail nail.

Preferably, the second plane extends through the second leg, whereby the spreader insert can be made even more compact.

Preferably, the first leg has a free end, which forms an at least approximately rectilinear extension of the first leg. Particularly preferably, the free end forms exactly a rectilinear extension.

Preferably, the third leg has a free end which forms at least approximately, preferably exactly, a rectilinear extension of the third leg.

Preferably, the first leg and / or the third leg at its free end (s) on a Verharkungsabschnitt, which extends at an angle, preferably perpendicular to the respective leg.

Preferably, the spreader insert is made in one piece from a rod material and is made of a special steel.

Preferably, the first arc is in the first plane, and the second arc is in the second plane.

Preferably, the first and second legs extend at least approximately parallel to one another and / or wherein the first leg and second leg have at least approximately the same length.

Preferably, the third leg extends at an acute angle or at least approximately parallel to the second leg.

Preferably, the first arc and the second arc on the same bending radius. The first and second sheets may be semicircular or Quarter-circle, in which case two quarter-circular arcs are connected via a straight leg. In the latter embodiment can also be spoken by a web.

Further embodiments are given in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1

einen Querschnitt durch eine Eisenbahnschwelle mit erfindungsgemässen Spreizeinlagen;

Fig. 2

eine Seitenansicht eines Schienennagels zur Verwendung in Kombination mit den Spreizeinlagen nach Figur 1;

Fig. 3

eine Ansicht von vorne des Schienennagels von Figur 2;

Fig. 4

eine Ansicht von unten des Schienennagels von Figur 2;

Fig. 5

eine Seitenansicht einer Spreizeinlage von rechts;

Fig. 6

eine Vorderansicht der Spreizeinlage nach Fig. 5;

Fig. 7

eine Seitenansicht der Spreizeinlage nach Fig. 5 von links;

Fig. 8

eine Draufsicht der Spreizeinlage nach Fig. 5; und

Fig. 9

eine perspektivische Ansicht der Spreizeinlage.

Preferred embodiments of the invention will be described below with reference to the drawings, which are given by way of illustration only and are not to be interpreted as limiting. In the drawings show:

Fig. 1

a cross section through a railway sleeper with inventive spreading elements;

Fig. 2

a side view of a rail nail for use in combination with the spreader pads FIG. 1 ;

Fig. 3

a view from the front of the rail nail of FIG. 2 ;

Fig. 4

a bottom view of the rail nail of FIG. 2 ;

Fig. 5

a side view of a spreader insert from the right;

Fig. 6

a front view of the spreader insert after Fig. 5 ;

Fig. 7

a side view of the spreader insert after Fig. 5 from the left;

Fig. 8

a plan view of the spreader insert after Fig. 5 ; and

Fig. 9

a perspective view of the spreader.

DESCRIPTION OF PREFERRED EMBODIMENTS

In FIG. 1 is a cross section through a track cutout of a railway sleeper shown. On a threshold 1, a rail 2 is fixed on a ribbed plate 5 by means of rail pins 7. The rail pins 7 protrude through openings 50 in the fin plate and extend into holes 3 which are mounted in the threshold 1, wherein the rail pins 7 are fixed in the holes 3. When renewing the fixed nail seat, a spreader insert 4 is sunk in each case for fixing the rail nails 7 in the bores 3 and optionally encapsulated by means of a potting compound 6 in this waterproof. The rail pins 7 clamp the rail 2 to the threshold 1 or Ribbed plate 5.

In the FIGS. 2 to 4 is an embodiment of a rail nail 7 for use in the track construction after FIG. 1 shown. The rail nail 7 comprises a head section 70, a shaft section 71 adjoining thereto, and a nail tip section 72, which adjoins the shaft section 71. The nail tip section 72 terminates with a nail tip 73. As viewed from the head section 70, the shaft section 71 and nail tip 72 extend along a central axis M. The head section 70 comes into contact with the rail 2 and clamps it against the ribbed plate 5. The shaft section 71 protrudes the receiving opening 50 in the ribbed plate 5 through and extends into the bore 3 in the threshold.

Preferably, the shank portion 71 has a square or rectangular cross section. Alternatively, the shaft portion 71 may also have a circular cross-section.

The nail tip portion 72 is formed so that the cross section of the nail tip portion 72 seen from the shaft portion 71 forth, is continuously reduced. Preferably, the degree of reduction over the nail tip portion 72 from the shaft portion 71 to the nail tip 73 is constant.

The nail tip 73 may have a variety of different shapes. In the present embodiment, this is provided with a convex edge.

Such a rail nail 7 typically has a diameter in the range of 14 to 19 mm, in particular 16 mm and a length in the range of 130 to 180 mm, in particular 165 mm.

In the FIGS. 5 to 9 the inventive spreading insert 4 is shown. It is bent from a one-piece rod material, preferably made of special steel, as it can also be used for reinforcing iron.

The spreader insert 4 has three legs 40, 41, 42, which are slightly resilient to each other are formed. A first and a second leg 40, 41 extend at least approximately, here exactly, parallel to each other. The first and second legs 40, 41 are connected to each other via a first arc 43. The first leg 40 and the second leg 41 lie in a common first plane E1. This means that, for example, the central axes along which the legs 40, 41 are part of this first plane E1 and define this first plane E1. This first level E1 runs in the FIG. 6 in the plane of the drawing sheet and is indicated by a dash E1 in the FIG. 5 indicated. The first arc 43 is formed in the first plane E1 of the two legs 40, 41 bent, as best in FIG. 9 is recognizable.

Opposite to the first arc 43, the second leg 41 is followed by a second arc 44, which is then followed by the third leg 42. The third leg 42 lies in a second plane E2, which is perpendicular to the first plane E1. Preferably, the second plane E2 is such that it extends through the de second leg 41, so that the third leg 42 comes to rest on the second leg 41. The second level E2 is in the FIG. 5 shown accordingly. Because of this arrangement, the inventive spreader 4 can be used for rail nails, since the spreader insert is inserted into the bore 3, that all three legs 40, 41, 42 are in contact with the wall of the bore 3 and none of the cross section of the bore more than necessary reduced. Consequently, the rail nail can be driven in well without requiring too much deformation of the spreader pad, as occurs, for example, in prior art embodiments. In addition, the rail nail is not deflected from its axis during the process of driving. When driving the rail nail, the legs are pressed into the side wall of the bore. Consequently, the rail nail 7 and the spreader pad 4 are clamped together in the bore.

The first leg 40 has a first free end 46, which at least approximately, preferably exactly, forms a rectilinear extension of this leg 40.

The third leg 42 has a second free end 45, which at least approximately, preferably exactly, forms a rectilinear extension of this leg 42. Preferably, the third leg 42 adjoins a Verharkungsabschnitt 47, which angled, preferably perpendicular, from the third leg 42 protrudes and preferably in the second plane E2 extends. The Verharkungsabschnitt 47 is pressed by the breaking of the rail nail in the wood of the threshold, so the resistance to pulling can be further increased.

Optionally, the first leg 40 may comprise a not shown here Verarkungsabschnitt, which is formed analogous to the Verharkungsabschnitt 47.

The second leg 41 is preferably longer than the first leg 40, as shown in FIG FIG. 2 is recognizable. The third leg is preferably formed shorter than the two other legs 40, 41. However, it preferably extends over at least two-thirds of the length of the spreader 4.

Preferably, all three legs 40, 41, 42 parallel to each other. Alternatively, the third leg 42 may extend at an acute angle to the second leg 41, as best shown in FIG FIG. 3 is recognizable. Both embodiments are advantageous because both provide a very compact structure.

Preferably, the first arc 43 and the second arc 44 have the same bending radius, which is advantageous with respect to the compact structure. Due to the arrangement of the first sheet 43 and the second sheet 44, the spreader insert can be made very compact, which allows the introduction into holes 3, which have a relatively small diameter, as is common in holes for rail nails.

The first leg 40 typically has a length from the free end 46 to the first arc 43 of 75 to 105 mm. Particularly preferred is a length range between 78 and 98 mm, in particular 93 mm.

The second leg 41 typically has a length from the first arc 43 to the second arc 44 of 90 to 120 mm. Particularly preferred is a length range between 95 and 110 mm, in particular 100 mm.

The third leg 42 typically has a length from the free end 45 to the second arc 44 of 65 to 100 mm. Particularly preferred is a length range between 83 and 93 mm, in particular 88 mm.

Both sheets 43, 44 preferably have a radius of 6 to 12 mm, more preferably 8 to 10 mm, in particular 9 mm.

LIST OF REFERENCE NUMBERS

1

threshold

2

rail

3

drilling

4

spreading insert

40

first leg

41

second leg

42

third thigh

43

first bow

44

second bow

45

free end

46

free end

47

Verharkungsabschnitt

5

rib plate

50

receiving opening

6

potting compound

7

rail spike

70

header

71

shank portion

72

Nail tip section

73

nail tip

M

central axis

Claims (15)

Spreader insert (4) for rail pins, wherein the spreader insert is bent from a rod material, two first and second legs (40, 41) interconnected by a first arc (43) and at least approximately parallel to one another via a second arc (44) characterized in that the first limb (40) and the second limb (41) lie in a common first plane (E1) and that the third limb lies in a second plane (E2) which is substantially perpendicular to the first plane. Strut insert according to claim 1, characterized in that the second plane (E2) extends through the second leg (41). Strut insert according to one of the preceding claims, characterized in that the first leg (40) has a free end (46) which forms an at least approximately straight extension of the first leg (40). A spreader pad according to claim 3, wherein the free end (46) of the first leg (40) forms precisely a rectilinear extension of the first leg (40). A spreader pad according to any one of the preceding claims, wherein the third leg (42) has a free end (45) which forms at least approximately, preferably exactly, a rectilinear extension of the third leg (42). Spreader insert according to one of the preceding claims, wherein the first leg (40) and / or the third leg (42) at its free end (46, 45) have a Verharkungsabschnitt (47) which at an angle, preferably perpendicular, to the respective leg ( 40, 42). Strut insert according to claim 6, characterized in that the first leg (40) arranged Verharkungsabschnitt in the first plane (E1) is located, and / or in that the at the third leg (42) arranged Verharkungsabschnitt (47) lies in the second plane (E2). A spreader pad according to any one of the preceding claims wherein it is made in one piece from a rod material. A spreader pad according to any one of the preceding claims, wherein the first sheet (43) lies in the first plane, and / or wherein the second sheet (44) lies in the second plane. The spreader insert according to one of the preceding claims, wherein the first and second legs (40, 41) extend at least approximately parallel to one another and / or wherein the first leg (40) and second legs (41) have at least approximately the same length. A spreader pad according to any one of the preceding claims, wherein the third leg (42) extends at an acute angle or at least approximately parallel to the second leg (41). Spreader insert according to one of the preceding claims, wherein the third leg (42) is shorter than the first and / or second leg (40, 41). A spreader pad according to any one of the preceding claims, wherein the third leg (42) extends over at least two-thirds the length of the spreader pad. A spreader pad according to any one of claims 1 to 9, wherein the second leg (41) is made longer than the first leg (40). A spreader pad according to any one of the preceding claims, wherein the first arc (43) and the second arc (44) have the same bend radius.

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