Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B9/00—Fastening rails on sleepers, or the like
  • E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
  • E01B9/04—Fastening on wooden or concrete sleepers or on masonry without clamp members
  • E01B9/14—Plugs, sleeves, thread linings, or other inserts for holes in sleepers
  • E01B9/18—Plugs, sleeves, thread linings, or other inserts for holes in sleepers for concrete sleepers

Definitions

• the present invention relates to an anchoring sheath allowing the assembly of a functional member to a substrate in which the sheath is embedded.
• Said functional member can in particular be a screw or a lag screw and said substrate can be a block of concrete molded around the sheath.
• a sheath according to the invention is in particular intended to be used for fixing a railway rail to a concrete sleeper.
• plastic sheaths closed at one of their ends. These sheaths are embedded in concrete molded in the form of a railroad sleeper, so that their open ends open onto the upper face of this sleeper, and receive the lag screws securing the rails.
• Such a sheath is delivered with a closure cap at its open end, making it possible to avoid the penetration of foreign bodies into its cavity, in particular of water or gravel, when the crosspiece which comprises it is stored outside or placed on the site.
• These foreign bodies are indeed likely to oppose the screwing of a lag screw in a sheath and, under the pressure of the lag screw, to be at the origin of cracks in the concrete.
• the caps are punctured by means of a bar to allow the installation of lag screws.
• caps normally make it possible to ensure a fairly good tightness of the sheaths, without it being possible however to be certain that this tightness is ensured in all cases.
• the manufacturing tolerances of the caps and sheaths can in fact allow a gap to exist between these caps and sheaths, by which runoff water can penetrate into the cavity of a sheath; the caps may not be fully inserted and held on the sheaths, and may be torn off during handling.
• the risk of cracking of the concrete in the event of foreign bodies could be limited by equipping the sheath with an external metal shell, formed by two assembled half-shells. This shell, however, significantly increases the cost of manufacturing a sheath.
• the plug made of destructible material, in particular expanded polystyrene.
• the plug comprises a cylindrical stud of limited height, intended to be engaged in the corresponding end of the sheath and to be glued to the latter to close this end.
• Document N ° DD 228 846 also discloses a sheath for fixing a rail to a concrete sleeper, the lower end of which is provided with an internal rim and a plug which can be clipped onto this rim.
• the plug is injected with the sheath in one piece, and is connected to this sheath by a tearable zone.
• a peripheral wall makes it possible to guide the plug towards the internal rim of the sheath to allow clipping.
• the present invention aims to provide a sheath for treating the case of the presence of water in the sheath while overcoming the aforementioned drawbacks of the existing sheath.
• Its objective is therefore to provide a sheath making it possible to eliminate any risk of deterioration of the substrate surrounding the sheath during the installation of a functional member in this sheath, without the need to use a solvent. to allow the erasure of any foreign bodies present in the sheath.
• Another objective of the invention is to provide a sheath that remains easy to manufacture and has a perfect seal when the concrete is poured.
• the sheath concerned is, in a manner known per se, open at its two ends and receives a plug at its "lower" end, that is to say its end intended to be embedded in the substrate.
• the sheath comprises, at this lower end, a circular rim projecting radially inwards, which delimits an opening of smaller diameter than that of the cavity delimited by the sheath, and
• the plug is made of elastic compressible material and comprises a prominent central boss as well as a base part, the boss having a cross section greater than that of said opening and comprising a groove arranged in its side wall, at its base, of such that it can be engaged in said opening until penetration of said flange into said groove, and said base portion being shaped to, in this penetration position, be applied against said flange.
• the plug and the sheath are thus easy to assemble, by engagement of the boss in the lower end of the sheath and penetration of said flange into said groove.
• the boss largely protrudes inside the sheath and constitutes a compressible buffer allowing, during the fitting of said functional member, the erasure of one or more foreign bodies possibly present in the cavity of sheath.
• the base part is, for its part, applied against said edge and ensures a perfect seal during the pouring of the concrete. It also forms a lower compressibility reserve for the case where the foreign body or bodies have a relatively large volume.
• the flange and the plug can be shaped so that the plug can be assembled with the sheath by snapping on said flange into said groove.
• said flange may be shaped so as to delimit an opening of conical shape, the largest diameter of which is situated on the outside of the sheath, and / or have a rounded zone between its outer face and its face delimiting this opening.
• the flange and the plug can be shaped so that the plug can be assembled with the sheath by means other than a snap-fastening, in particular by screwing.
• the central boss of the plug comprises a thread dimensioned to cooperate with the flange, which communicates with said groove.
• Said base part can extend, in the radial direction, beyond the rim and cover part of the lower end of the sheath, which strengthens the resistance of the mounting of the plug on the sheath. .
• the lower end of the sheath and said base part may have reciprocal interlocking zones, which increase the contact surface between the base part and the sheath, and help to keep this base part in close application against the lower end of the sheath.
• this lower end may have an external peripheral recess at the junction of the side wall of the sheath and said flange, and the base part may include a peripheral flange suitable for pressing against the sheath at this recess. .
• Said reciprocal nesting zones may also be shaped to snap or wedge said base part on the lower end of the sheath.
• Figure 1 is a view according to a first embodiment, in section passing through the axis of the sheath;
• Figure 2 is a perspective view of the plug that includes this sheath;
• Figure 3 is a partial view of the sheath according to a second embodiment, in section passing through the axis of the sheath;
• Figure 4 is a perspective view of the plug comprises this sheath;
• Figure 5 is a partial view of the sheath according to a third embodiment, in section passing through the axis of the sheath, and
• Figure 6 is a half sectional view, on an enlarged scale, of this sheath.
• Figure 1 shows an anchoring sheath 1 usable for mounting a rail on a concrete sleeper.
• This sheath 1 is, according to a well-known technique, intended to be embedded in concrete molded in the form of a railway sleeper, so that one of its ends opens onto the upper face of this sleeper, and to receive a lag bolt ensuring the fixing of a rail.
• the sheath 1 comprises external annular projections 2 for its support in the concrete and an internal thread 3 to allow the screwing of the lag screw.
• the sheath 1 is open not only at its "upper” end, that is to say that by which the lag screw is intended to be engaged in it, but also at its "lower” end 1b, that is ie that intended to be embedded in concrete, and receives a plug 4 for closing this end
• the sheath 1 comprises a circular rim 5 projecting radially inwards, which delimits an opening of smaller diameter than that of the cavity delimited by the sheath 1.
• the plug 4 is made of compressible elastic material. It comprises a middle part 4a of cross section greater than that of the opening delimited by the rim 5, ends 4b of smaller section than this opening and flared transition zones 4c between this middle part 4a and these ends 4b. A groove 6 suitable for receiving closely the rim 5 is arranged at the middle part 4a. As is easily understood, the plug 4 is intended to be inserted into the opening delimited by the flange 5 so as to deform its part 4a inwards, until the flange 5 penetrates into the groove 6. The elastic return the material of the plug 4 maintains this plug 4 in position relative to the sheath 1.
• the plug 4 For its mechanized insertion, the plug 4 includes cavities at its ends, allowing the support tool to take hold. In said assembly position, the part of the plug 4 engaged in the sheath 1 forms a prominent central boss, which protrudes widely inside the sheath 1 and allows, during the establishment of the lag screw, the erasure of one or more foreign bodies possibly present in the cavity of the sheath 1.
• the part of the plug 4 located outside the sheath 1 is applied against the flange 5 so as to ensure perfect sealing of the sheath 1 during the pouring of the concrete. This part of the plug 4 located outside the sheath 1 also forms an additional reserve of compressibility relative to the concrete.
• the plug 4 is intended to be assembled to the sheath 1 by screwing. It includes a prominent central boss 4a in which a thread 7 is arranged, which communicates with the groove 6. This thread 7 allows the screwing of the plug 4 until the base part 4d of the plug 4 is applied tightly against the flange 5.
• the base part 4d can comprise a cavity opening onto its external face, in particular of hexagonal shape, allowing the support of a tool for mechanically inserting the plug 4 into the sheath 1.
• the flange 5 delimits an opening of conical shape, the largest diameter of which is situated on the outside of the sheath 1, and has a rounded zone 5a between its outer face and its face delimiting this opening.
• the outer face of the rim 5 forms a circular projection 8 with a "V" shaped section and a peripheral recess is arranged at the junction of the side wall of the sheath .1 and the rim 5.
• the base part 4d of the plug 4 extends, in the radial direction, beyond the rim 5 and covers part of the lower end of the sheath 1.
• This base part 4d comprises a groove shaped to be engaged closely on the projection 8 when the plug 4 is assembled to the sheath 1, and a flange 9 shaped to be engaged in said recess.
• the end 1b of the sheath 1 and the base part 4d thus have reciprocal interlocking zones which increase the contact surface between the base part 4d and the sheath 1 and contribute to keeping this base part 4d in close application against the lower end of the sheath 1.
• the invention provides a decisive improvement to the prior art, by providing an anchoring sheath making it possible to eliminate any risk of deterioration of the substrate surrounding the sheath during the installation of a functional organ. in this sheath, without the need to use a solvent to allow the erasure of any foreign bodies present in the sheath.
• This sheath remains easier to manufacture and has a perfect seal when pouring concrete.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
• Dowels (AREA)
• Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
• Multi-Conductor Connections (AREA)
• Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
• Reinforcement Elements For Buildings (AREA)
• Bridges Or Land Bridges (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=27636272

Family Applications (1)

Country Status (7)

Cited By (2)

Families Citing this family (1)

Citations (4)

• 2002
  • 2002-02-18 FR FR0202030A patent/FR2836165B1/fr not_active Expired - Fee Related
• 2003
  • 2003-02-04 ES ES03709916T patent/ES2260613T3/es not_active Expired - Lifetime
  • 2003-02-04 EP EP03709916A patent/EP1476603B1/de not_active Expired - Lifetime
  • 2003-02-04 DE DE60304452T patent/DE60304452D1/de not_active Expired - Lifetime
  • 2003-02-04 AU AU2003214346A patent/AU2003214346A1/en not_active Abandoned
  • 2003-02-04 AT AT03709916T patent/ATE322581T1/de not_active IP Right Cessation
  • 2003-02-04 WO PCT/FR2003/000334 patent/WO2003071033A1/fr not_active Application Discontinuation

Patent Citations (4)

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