Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
  • E04G21/14—Conveying or assembling building elements
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
  • E04G21/14—Conveying or assembling building elements
  • E04G21/142—Means in or on the elements for connecting same to handling apparatus

Definitions

• the present invention relates to an anchor for hardenable material and in particular for concrete, intended to be included in part in the concrete element, the other part remaining exterior to allow handling of the element. It relates in particular, but not exclusively, to an anchoring piece intended to be introduced into thin panels such as those found in prefabricated constructions.
• the problem which is solved by the present invention is that of obtaining a point making it possible to exert tensile forces (lifting forces for example) on an element obtained by casting a material capable of hardening (concrete, plaster, etc.).
• tensile forces lifting forces for example
• an element obtained by casting a material capable of hardening concrete, plaster, etc.
• several solutions have already been proposed, using a rod, or elongated element, having at its upper part a gripping means and, at its lower part, means for anchor.
• a known type of anchor is shown in FIG. 1. It comprises a head A, a rod B, and a foot C whose diameter is greater than that of the rod. This insert makes the element work and. compression, that is to say that it transfers the tensile force to the foot of the anchor which determines a taper cone.
• an eye anchor such as that which is represented, in front view, in FIG. 2, which also has a head A, a rod B and a foot D having an opening E for the passage of a frame.
• Such an anchor makes it possible to obtain a connection between the head A and a reinforcement or reinforcing iron, passing through the eye E. The transfer of the tensile force to the mass of the panel then results from the adhesion of the reinforcements inside the panel.
• anchors are also used, and in particular the so-called “carp tail” anchors, the rod of which is terminated at its base by the “carp tail”, present at its upper end, a hole for example allowing the introduction of a lifting hook, or a threaded rod or threaded tub.
• the carp tail forms a sealing tab inside the material.
• all of the known anchoring means have drawbacks or limits in use, in particular in the case of thin panels.
• the tear-off cone cannot be formed properly and there are sometimes bursts F, or at least cracks at the top of the connection if the he thickness of the element is small.
• EP-A-0 259 295 describes an anchor in which an eye is provided in the head of the anchor To facilitate the passage of a curved reinforcement, the lower internal surface of the hole is slightly curved. But the frame does not bear in the bottom of said orifice.
• FR-A-2 072 873 relates to a plastic bush for example, intended to receive a metal stud and reinforcing bars penetrating inside recesses formed in the body of the bush. But there is no direct link between the stud and the reinforcement bars. In addition, the socket occupies a larger volume which is not filled with concrete which poses problems for thin panels and it can only be used with reinforcements.
• the object of the present invention is to overcome the drawbacks mentioned above and to propose an anchor of a universal nature allowing work, either by compression alone, or by compression and adhesion, and therefore the length can be reduced compared to traditional anchors.
• the anchoring piece for curable material comprising a gripping head, a rod having an axis of symmetry and a foot adhering to the material, the foot being of dimension greater than that of the rod, is characterized in that the foot comprises at least one support and guide ramp, hollowed out in its upper face, for a reinforcing iron.
• the frame is held in position by the edges of the ramp and cannot slide during molding.
• the section of the ramps is circular and the diameter of the grooves is substantially equal to the diameter of the reinforcement bars so that the range of the bars inside the ramps is optimal.
• the base of the rod is pierced with at least one eye extending in a direction substantially perpendicular to the axis of the rod, the upper surface of the foot forming a curved support ramp , in line with the opening of the eye.
• the ramp (or the ramps) is eccentric relative to the axis of the rod. It is thus possible to bring together on one anchor foot two or more reinforcing bars.
• An anchor according to the invention can be used, either without reinforcing iron, the material of the element working under compression, or with reinforcing iron resting inside the ramp, which ensures suitable mechanical transmission. forces applied to the anchor, for example during handling.
• FIG. 5 a distinction is made between the lower end of the implant 1 which, in the example shown, consists of a cylindrical rod pierced with an eye 2 and terminated immediately below the eye 2 by a foot 3. Inside the eye passes a reinforcing iron 4 which is inserted, during assembly, in a groove or support ramp 5 in which the iron is perfectly guided and maintained.
• the foot 3 can be partially hollowed out as shown in 6.
• the anchor head not shown can be any and allows the anchor to be taken up by a suitable lifting device. It has thus been noted that the anchor according to the present invention works simultaneously when a frame has passed inside the eye 2, by compression and by adhesion of the concrete, or more generally of the constituent of the element.
• FIG. 7 shows a view over the device shown in FIG. 5, and it can be seen that the iron 4 is perfectly guided by the ramp 5.
• the length of the implant provided with one or more orifices for reinforcing bars, and support ramps, is sufficient in relation to the physical characteristics of the constituents of the element, it is possible to remove the reinforcing bars, the support ramps 5 then forming an anchorage by penetration of the material inside said ramps.
• the implant according to the invention can be either full, and obtained by molding, forging or machining, or hollow and essentially constituted by a tube as shown in Figures 8 and 9.
• the upper end of the rod 1 can present for example a tapped hole 8
• the foot of the anchor 3 is constituted by a development 9 of the tube which, as before, supports the frame 4 over a sufficient part of its length, this frame 4 passing, as previously , by the eye 2.
• the curvature of the opening 9 is such that it corresponds exactly to the curvature of the iron 4 in order to maintain it perfectly when a traction is applied to the bush 1.
• Figures 10 and 11 show respectively, in front view and in side view, the anchoring in a thin panel.
• an anchor such as that shown in Figure 6 allowing the passage of two frames 4a and 4b extending in two parallel vertical planes.
• the head 7 protrudes inside a reservation 10 provided in the panel 11.
• the frames 4a and 4b can always extend in two parallel planes, at different angles, the two support ramps 5 having identical or different curvatures. A better distribution of the reinforcing bars is thus obtained inside the panel, which increases safety.
• Figures 12, 13 and 14 show another embodiment of an anchor foot 3, in which the ramps 5 offset from the rod 1 can be straight or inclined as required. That is to say that the planes containing the axes X of the ramps are either parallel to the axis of the anchor, or inclined with respect to this axis.
• an implant with two reinforcing bars these can be fixed in the implant by crimping for example, which gives a rigid assembly, easy to arrange, before the component of the panel is cast.
• the implant with several passage ramps makes it possible to diffuse the forces of the element, which is advantageous, especially if the resistance is very low, for example when the concrete has not yet taken its resistance to final compression.
• a very short implant with several reinforcing bars created for handling very thin slabs can also be used on the edge of the elements for lifting and vertical handling.
• the support ramps 5 can be, in one or two pieces, added to the implant by crimping, welding or even produced by deformation of the piece.
• the anchoring parts according to the invention can be obtained by known manufacturing methods and they can be either in one piece, or include elements added by welding or braiding, and, in particular, the foot provided with its ramps can be attached to a forged rod.
• the conical shape of the foot particularly when the latter is hollowed out since the material then enters the recess, makes it possible to counterbalance the lateral forces which can be applied by a machine, when lifting a panel.
• a welded connection for example, between the implant and the reinforcing iron can eliminate any articulation, which limits cracks during lifting.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Mechanical Engineering (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Joining Of Building Structures In Genera (AREA)
• Reinforcement Elements For Buildings (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=9368311

Family Applications (1)

Country Status (11)

Families Citing this family (29)

Family Cites Families (20)

• 1988
  • 1988-07-11 FR FR8809386A patent/FR2633959B1/fr not_active Expired - Lifetime
• 1989
  • 1989-07-10 AU AU38782/89A patent/AU619874B2/en not_active Expired
  • 1989-07-10 JP JP1507830A patent/JPH03500315A/ja active Pending
  • 1989-07-10 WO PCT/FR1989/000365 patent/WO1990000658A1/fr active IP Right Grant
  • 1989-07-10 DE DE89908195T patent/DE68909917T2/de not_active Expired - Fee Related
  • 1989-07-10 EP EP89908195A patent/EP0383870B1/de not_active Expired - Lifetime
  • 1989-07-11 ES ES8902443A patent/ES2016146A6/es not_active Expired - Lifetime
  • 1989-07-11 CA CA000605409A patent/CA1335475C/fr not_active Expired - Fee Related
• 1990
  • 1990-03-10 KR KR1019900700509A patent/KR900702163A/ko not_active Application Discontinuation
• 1993
  • 1993-02-12 US US08/017,969 patent/US5469675A/en not_active Expired - Fee Related
• 1994
  • 1994-08-04 HK HK77994A patent/HK77994A/xx not_active IP Right Cessation

Non-Patent Citations (1)

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