Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
  • E01B3/28—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone
  • E01B3/40—Slabs; Blocks; Pot sleepers; Fastening tie-rods to them
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
  • E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
  • E01B1/005—Ballastless track, e.g. concrete slab trackway, or with asphalt layers with sleeper shoes
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
  • E01B3/28—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B2204/00—Characteristics of the track and its foundations
  • E01B2204/01—Elastic layers other than rail-pads, e.g. sleeper-shoes, bituconcrete
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B2204/00—Characteristics of the track and its foundations
  • E01B2204/09—Ballastless systems

Definitions

• the invention relates to a block boot for railway track systems according to the preamble of claim 1 .
• So-called slab tracks are increasingly preferred to ballasted tracks since they allow an increased performance of the track with regard to the attainable speeds and reduced maintenance costs.
• sleeper block units are used where a sleeper block that is usually made of concrete is received in a block boot made of molded rubber and an elastomer damper is placed between the bottom of the sleeper block and the bottom of the block boot.
• the block boot is encased in concrete, and on the upper side of the sleeper block, a fastening system for a rail is arranged. It has been known for some time to provide ribs on the inner walls of such block boots in order to reduce the contact area between the block boot and the sleeper block.
• the fins lead to some difficulties in the manufacture of the block boot.
• the mold has to be thoroughly cleaned before every molding process.
• the fine grooves that will subsequently form the fins have to be carefully cleaned so that they will be entirely filled with rubber during the molding process.
• the finished block boot is removed from the mold, there is a risk that the fine fins remain caught in the aforementioned grooves and are torn off from the block boot.
• the risk that the fine fins are already snapped or sheared off while the block boot is assembled with the sleeper block cannot be entirely excluded either.
• vertex line designates a theoretical line extending furthest from the respective side wall along the rib at the free end of each rib.
• the tapered shape of the rib eliminates a weakness of the known prior art, namely the small cross-sectional area of the fin at its junction to the rib, and thereby promotes both a simpler manufacture of the block boot and its durability without impairing its advantageous properties.
• Figure 1 a top view of a block boot of the invention
• Figure 2 a section along line II - II in Figure 1 through a long side wall of the block boot of Figure 1 ;
• Figure 3 a detail of Figure 2 on an enlarged scale over Figure 2;
• Figure 4 a section along line IV - IV in Fiqure 1 throuqh a short side wall of the block boot of Figure 1 ;
• Figure 5 a detail of Figure 4 on an enlarged scale over Figure 4.
• Block boot 1 has a substantially rectangular ground plan with rounded edges 4, two long side walls 2, two short side walls 3, a bottom 5 ( Figure 2) and an upper opening 6 with a surrounding rim 7, Its height is e.g. 158 mm.
• side walls 2 and 3 are slightly inclined in order to allow a later replacement of the sleeper block and of the encased block boot 1.
• Figure 2 shows a section through !ong side wall 2 of block boot 1 along line II - li in Figure 1, Rim 7 of upper opening 6 upwardly tapers to an apex 8 that will subsequently lie against the sleeper block, prevents the ingress of dust and guides water running down on the outside of the sleeper block to the outside of block boot 1 , Externally, rim 7 is provided with a surrounding bulge 9 that reinforces rim 7 and forms a mark for the concrete filling height while the sleeper block unit is being encased.
• the transition from side wall 2 as well as side wall 3 ( Figure 4) to bottom 5 forms a radius.
• ribs 10 that extend in parallel to bottom 5 and rim 7 are arranged, in the illustrated example 18 of them, Alternatively, more or less ribs 10 may be provided. In the illustrated example, the dimensions of ribs 10 and their intervals are uniform.
• FIG. 3 shows a detail of Figure 2 illustrating two ribs 10 at an enlarged scale over that of Figure 2.
• each one of ribs 10 first tapers slightly conically from a base width 13 toward the interior of block boot 1 and ends in a rounded shape having a radius 11
• Reference numeral 24 denotes a vertex line that extends at the highest point of rib 10, as measured from side wall 2, along rib 10 perpendicularly to the drawing plane of Figure 3.
• 12 denotes the height of rib 10, and 14 the space between two ribs 10. Due to the radius 11 of ribs 10, the contact area between the block boot and a sleeper block subsequently received therein is nearly reduced to a contact line per rib 10 in the area of vertex line 24.
• Figure 4 shows a section through short side wall 3 of block boot 1 along line IV - IV in Figure 1 ,
• ribs 15 that extend in parallel to rim 7 and bottom 5 are arranged, in the illustrated example 9 of them. Alternatively, more or less ribs 15 may be provided. In the illustrated example, the dimensions of ribs 10 and their intervals are uniform.
• a drainage opening 23 is provided in side wall 3, directly above the bottom, so that water that may be present in block boot 1 may flow off before encasing.
• FIG 5 shows a detail of Figure 4 illustrating one rib 15 entirely and a second one partly at an enlarged scale over that of Figure 4,
• each one of ribs 15 extends toward the interior of block boot 1 and asymmetrically tapers from a base width 19 to an apex having a small radius 17 of e.g. less than 1 mm, while a shorter wall section 20 forms a steeper angle and a longer wall section 21 forms a flater angle with side wall 3.
• Wall sections 20 and 21 are preferably straight but may alternatively be slightly convex.
• Reference numeral 25 denotes a vertex line that extends at the highest point of rib 15, as measured from side wall 3, along rib 15 perpendicularly to the drawing plane of Figure 5, 18 denotes the height of rib 10, and 22 the space between two ribs 15, Due to the radius 17 of ribs 15, the contact area between the block boot and a sleeper block subsequently received therein is nearly reduced to a contact line per rib 15 in the area of vertex line 25. At the end of longer wall section 21 near the wall, a radius 16 may be provided.
• the described design of the ribs enhances the elastic properties of the block boot in the sense that the block boot recovers its original shape more quickly under low lateral forces.
• the variability of the contact surfaces under lateral forces also increases the longevity of the block boot since a constant contact of the entire surface of the rib on the sleeper block is avoided.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Sealing Devices (AREA)
• Diaphragms And Bellows (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=69374228

Family Applications (1)

Country Status (6)

Citations (5)

• 2021
  • 2021-01-14 EP EP21700219.5A patent/EP4097299A1/de not_active Withdrawn
  • 2021-01-14 US US17/795,008 patent/US20230056693A1/en active Pending
  • 2021-01-14 AU AU2021212688A patent/AU2021212688A1/en active Pending
  • 2021-01-14 BR BR112022014265A patent/BR112022014265A2/pt not_active Application Discontinuation
  • 2021-01-14 KR KR1020217009879A patent/KR20210099551A/ko not_active Application Discontinuation
  • 2021-01-14 WO PCT/EP2021/050638 patent/WO2021151675A1/en active Application Filing

Patent Citations (5)

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