Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B21/00—Track superstructure adapted for tramways in paved streets
  • E01B21/04—Special fastenings, joint constructions, or tie-rods
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B5/00—Rails; Guard rails; Distance-keeping means for them
  • E01B5/02—Rails
  • E01B5/04—Grooved rails

Definitions

• This invention relates to a rail fixing element, in particular for tramway, subway and railway tacks.
• Rails for tramway, subway and railway tacks are known to be housed in corresponding seats of substantially trapezoidal cross-section provided in the road surface or in concrete slabs, in such a manner as to bring the rolling track substantially parallel with the roadway.
• Said rails are currently fixed in said seat by cylindrical rubber bushes fitted between the rail flange and the oblique surfaces of the seat.
• An object of the invention is to eliminate these drawbacks by providing a fixing element which enables the rails to be fixed in their seat in a simple and comfortable manner.
• a rail fixing element in particular for tramway, subway and railway tacks as claimed in claim 1.
• Figure 1 is an exploded front view of the fixing member of the invention
• Figure 2 is a longitudinal section therethrough during the initial stage of its assembly
• Figure 3 shows it in the same view as Figure 2 during an intermediate stage of its assembly
• Figure 4 shows in the final stage of its assembly.
• the fixing element of the invention comprises substantially a rectangular plate 2 containing a hole 4 of square section.
• the hole 4 is engaged by the end of an internally threaded bush 6, the other end of which is welded to a circular disc 8 for retaining a coil spring 10.
• the use of the fixing element will now be described with reference to a support structure in the form of an H-shaped monolithic box structure 12 on which special rail pieces 14 without a shank and support leg are secured.
• the box structure and the rail pieces are described in Utility Model Application
• This box structure is embedded in the road surface such that the horizontal upper surfaces of the vertical portions of the H structure are substantially at the same level as the road surface.
• This fixing element can also be used to fix rails of traditional type to sleepers.
• a plurality 18 of holes having the same shape as the plate 2 but with slightly greater dimensions. Said holes 18 are spaced apart by a distance corresponding to that of corresponding holes 20 provided in the groove 22 of the rail pieces 14.
• the fixing elements are applied to the rail piece by means of threaded bolts 24 which pass through the holes 20 and partially engage in the threaded bolts 24 which pass through the holes 20 and partially engage in the threaded bushes 6, the plates 2 being arranged substantially aligned with the longitudinal axis of the holes 18 in the horizontal portion 16 (see Figure 2).
• the rail pieces are then rested on the horizontal portion 16, on which a pad of damping material 25 has previously been placed, such that each fixing element becomes inserted through the hole 18 and the bush 6 lies within the compartment 32 below said horizontal portion 16.
• a pin 28 is inserted from above through a hole 26 provided in the groove 22 of the rail piece, to rest with its lower end 30 on the plate 2 (see Figure 3).
• the bolt 24 is then rotated in its unscrewing direction, this rotation initially causing the plate 2 to descend as it is housed in the rectangular hole 18.
• the friction between the internal thread of the bush 6 and the thread of the bolt 24 means that the subsequent rotation of the bolt 24 causes the plate 2 to rotate, thus no longer supporting the pin and hence enabling it to fall, until its head 34 rests on the rail piece to hence interfere with the sides of the plate.
• the effect of this interference it to prevent rotation of the plate, consequently further screwing of the bolt causes the bush 6 and plate 2 to rise until the plate 2 rests against the lower edge of the horizontal portion 16, to clamp the rail to it.
• the fixing element of the invention enables the rails to be fixed in a simple and comfortable manner, as it can be secured to the rail before this is inserted into the seat.
• a rib is provided on the lower surface in correspondence with at least one longitudinal edge of the rectangular hole 18, to interfere with the plate and prevent its rotation.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Mechanical Engineering (AREA)
• Machines For Laying And Maintaining Railways (AREA)
• Train Traffic Observation, Control, And Security (AREA)
• Railway Tracks (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=11424368

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Family Cites Families (2)

• 1998
  • 1998-06-26 IT IT98VE000022 patent/IT245130Y1/it active
• 1999
  • 1999-06-11 AU AU45115/99A patent/AU4511599A/en not_active Abandoned
  • 1999-06-11 EP EP99927954A patent/EP1095188A1/de not_active Withdrawn
  • 1999-06-11 WO PCT/EP1999/004033 patent/WO2000000700A1/en not_active Application Discontinuation

Non-Patent Citations (1)

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