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
  • E04G21/142—Means in or on the elements for connecting same to handling apparatus
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
  • E04B1/38—Connections for building structures in general
  • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
  • E04C5/08—Members specially adapted to be used in prestressed constructions
  • E04C5/12—Anchoring devices

Definitions

• the invention relates to a dynamic lifting anchor, a construction element, such as a concrete panel in particular, cast horizontally, for lifting said panel without mechanical means or additional reinforcements.
• This anchor comprises in known manner a head portion capable of being attached to a gripping ring, a foot and a body interposed between the head and the foot, the body and the foot being intended to be immersed in the constituent material of the construction element, the anchor being obtained by folding at least one flat, of which different successive portions respectively form the head, the body and the foot of the anchor.
• an anchor comprising a rigidity box, formed at the foot of the anchor by two opposing divergent flattening legs and two converging lower branches, has the advantage of maintaining the angle of diverging branches and thus the amplitude of the cone of compression generated when lifting a building element.
• an anchor of this type is not particularly suitable for lifting particularly heavy construction elements and thus limited its scope.
• the invention aims to overcome these disadvantages.
• the invention relates to a lifting anchor of a construction element, such as a concrete panel, comprising a head portion capable of being attached to a gripping ring, a foot and a body interposed between the head and the foot, the body and the foot being intended to be immersed in the material constituting the construction element, the anchor being obtained by folding at least one flat defining different successive portions respectively forming the head, the body and the foot of the anchor, the constituent portions of the foot of the anchor comprising two lower branches diverging on either side of the body of the anchor, and two branches converge one towards the other and extending from divergent branches.
• the anchor comprises a reinforcing piece interposed between the two flat surfaces or portions, extending from the head of the anchor on at least a part of the body.
• the invention may furthermore exhibit one or both of the following aspects:
• the reinforcing piece is in the form of a flat.
• the reinforcing flat extends to half-height of the body of the anchor.
• the reinforcing flat extends to the lower ends of the converging branches.
• the anchor comprises locking means converging branches against each other.
• the locking means of a converging branch to the other comprise at least one projection formed on the lower free edge of the converging branch, and a receiving housing of this projection, formed in the thickness of the opposite divergent branch from its lower free edge, the projection being engaged in the housing when the flat head portions of the anchor and the reinforcement interposed therebetween, are pressed against each other.
• the locking means comprise a single projection offset transversely with respect to the center of the free edge of the diverging branch, and a cutout forming the receiving housing, the two lower free edges of the two converging branches each having a single projection and a cutting.
• the locking means comprise a plurality of protrusions and a plurality of cutouts, the projections and cutouts alternating each other along the lower free edge of the converging limb, the two lower free edges of the two converging limbs each having a plurality of projections; and several cuts forming notches.
• the anchor is formed of two identical flats assembled on either side of the reinforcement.
• the reinforcement comprises a passage window for the locking means made in its thickness.
• the anchor comprises on each of the outer faces of the two twinned flats, at least one external lifting ribs (31).
• the outer rib (31) extends along a longitudinal axis of the anchor (A-A ') or in a direction inclined relative to this axis.
• the two paired flats (12a, 12b), and / or at least one of the flats (12a, 12b) and the central reinforcement (20) are secured to one another by a bridge of material formed by a part of flat folded along a fold (33, 36, 37).
• the fold (33, 36, 37) extends along a lateral edge of the head of the anchor, or an upper edge of the head of the anchor or a lower edge of the foot of the anchor.
• FIGS. 1 and 2 are a perspective view of an anchor according to a first embodiment of the invention, unassembled (FIG. 1) and assembled (FIG. 2).
• FIGS. 3 and 4 are a perspective view of an anchor according to a second embodiment of the invention, unassembled (FIG. 3) and assembled (FIG. 4).
• Figures 5 and 6 show in perspective view an anchor according to a third embodiment of the invention unassembled ( Figure 5) and assembled ( Figure 6)
• FIGS. 7A and 7B show an alternative embodiment of a lifting and lifting anchor advantageously provided with two longitudinal ribs protruding outwardly from the lateral faces of the two flats, and respectively by a front view (7A) and a perspective view. (7B), FIG. 7A further illustrating in dashed lines the possibility of interposing a central reinforcement between the two flats provided with external longitudinal ribs;
• FIGS. 8 to 11 show, in perspective views, an alternative embodiment of the assembly of two flats constituting an anchor without reinforcement (FIGS. 8 to 10), and with reinforcement (FIG. 11) allowing a fixed relative hold of the various constituent flats of the anchor,
• Figure 12 shows schematically flat different constituent flats of the anchor of Figure 11 and their junctions in pairs.
• the anchor according to the invention comprises a head part 1, a part 2 forming the body of the anchor and a part 3 forming the foot. - -
• the anchor with the exception of the head 1 which remains outside the material of the construction element and is adapted to be attached to a handling machine, is intended to be embedded in the constituent material of the construction element whose anchor is intended to facilitate handling.
• this element of construction can be a slab or a concrete panel and the head 1 of the anchor is accessible from a free edge of the panel in which has been practiced a recess or "reservation" authorizing the passing of the head 1 of the anchor, while the body 2 and foot 3 of the anchor are immersed in the concrete.
• the anchor according to FIG. 3 is made from two identical flats 12a, 12b, that is to say two rigid strips, for example of metal whose thickness is small relative to the width, which are each folded according to four folding lines C, D, A, B to define successively for the flat part considered, in accordance with FIG. 1 (the references associated with the letter “a” refer to the flat part 12a, the references associated with the letter "b” being report to flat 12b):
• a branch 7a, 7b extending under the head portion 6a and diverging above the plane formed by this head portion, at a slight angle of about 15 ° for example, the two branches of the two flats diverging one relative to each other in the direction of the foot of the anchor,
• a convergent branch 8a, 8b extending under the branch 7a over a greater or lesser length for example of approximately 8 to 13 cm, making it possible to keep the foot of the anchor deep in the construction element,
• a converging branch 10a extending under the divergent branch to join the plane P and come to bear by its lower end against that of the converging branch 10b of the other flat.
• these flats In order to allow their folding along the fold lines A-D, these flats have a thickness generally less than 15 mm.
• This anchor with two twin flats is arranged in the panel so that the plane in which the width of the flats fits is confused with the lifting plane.
• the diverging lower branches 9a, 9b define active faces which, combined with the developed surface of the flat part, make it possible to urge the concrete both for adhesion and for shearing at the level of the anchors generated by the facets.
• these branches 9a, 9b define during lifting, a compression zone centered on the main plane of the anchor, the top of which is situated towards the foot of the anchor and whose the base extends around the head of the anchor.
• the amplitude of the base of the compression zone is all the more important that the inclination of a branch 9a, 9b is close to 45 °, and even lower than this inclination is close to a horizontal plane .
• Converging branches 10a, 10b which, according to this embodiment, are in contact with one another by their lower end edge, make it possible to maintain fixed the inclination of the divergent branches with respect to the longitudinal plane P of the flat when lifting the panel.
• the anchor comprises a reinforcement piece interposed between the two flats.
• the reinforcing piece is in the form of a plate 13 preferably having a length and a width substantially similar to those of a projection of the flats 12a, 12b between which it is arranged in the plane P.
• the plate located in the plane P, thus has an upper end portion engaged between the end portions of the two flats defining the head of the anchor, the lower end being held between the lower edges of the branches. lower convergent 10a, 10b.
• these two branches 10a, 10b and the part facing the plate comprise mutual locking means.
• these complementary means comprise two flattening projections 21 respectively extending the two converging branches 10b beyond their lower transverse edges 22, and a window 24 is formed in the thickness of the plate of FIG. reinforcement 20 to accommodate the two projections 21 of the two converging branches 10a, 10b.
• This window will be shaped to receive these two projections, that is to say it will have a width slightly greater than the cumulative widths of the two projections, and a height taking into account the inclination of these projections (which is that of the converging branches) to allow their insertion into the window on simple approximation of the two flats 12a, 12b to the plate 20.
• the projections of the two converging branches are offset from each other with respect to the longitudinal axis Al- ⁇ of each flat to allow their concomitant engagement in the window.
• the projections of the two flats are offset with respect to the axis Al- ⁇ of the same gap so that the two flats are identical and can be arranged on one side or the other of the plane P.
• the projections are each arranged so as to be able to dock against each other when assembling the flats around the plate 20, that is to say with a lateral edge coinciding with the axis ⁇ 1- ⁇ .
• the anchor according to FIGS. 1 and 2 also comprises two flats 12a, 12b assembled on either side of a reinforcing plate 20 whose convergent branches 10a, 10b are provided with projections 21 which engage in a corresponding window.
• the plate or reinforcement 20 interposed between the two flats 12a, 12b does not extend over the length of the projection in the plane P of the two flats, but at substantially half length flat body. It does not need to be provided with a window for the protrusions of the converging branches since it remains interposed between the head parts and the upper part of the body of the anchor.
• Converging branches comprise locking means directly to one another, being in the form of complementary notches 26 formed on the lower transverse edge of these branches. Ideally, the two flats facing the notches are identical.
• the hollows of the notches of a convergent branch allow the engagement of the projections of the notches of the other convergent branch.
• the reinforcement can be attached to the two flats by rivets at the head of the anchor and / or the body of the anchor.
• the central reinforcement may be provided between two flats with constituent ribs of the anchor.
• the anchor may comprise two longitudinal ribs 31 protruding externally outer side faces 32 of the two flats.
• These longitudinal ribs make it possible to achieve an effective lifting and turning anchor because of the flat mass of concrete trapped above the upper surface of the ribs when the panel is raised from a horizontal position to a vertical position.
• These external ribs may be formed by recessing the flats of an anchor with a punch of a shape adapted to the desired rib shape. Depending on this shape, it is possible to obtain the optimal lifting force profile. We can optimize the shape of each rib to achieve this goal.
• the anchor is formed by the pairing of two flats forming together a foot diverging branches 9a, 9b in particular at 45 ° and subjacent converging branches 10a, 10b forming an angle of about 60 ° -70
• convergent branches intermediate adhesion facets 7a, 7b, 8a, 8b whose upper facets 7a, 7b make an angle ⁇ of about 15 ° with the plane P, and the lower facets 8a, 8b an angle ⁇ about 160 ° with the corresponding upper facet.
• the outer rib 31 extends in this example along a lower portion of the upper facet 7a, 7b extends on the lower facet 8a, 8b to near the beginning of the foot (deviation of about 1/10 of the total length of the anchor). It represents a width equivalent to about a quarter of the width of a flat, and the height of the external boss that it forms is equivalent to the thickness of the flat.
• This rib presents in the illustrated example, a generally oblong shape. It may advantageously have a substantially triangular shape.
• an anchor with twin flats may have flats provided with external ribs, and not necessarily be provided with a central flat.
• the central reinforcement 20 can be secured to one of the two flats 12a by means of a flat fold 33 interposed according to FIG. 12, between two portions of flats in the extension l one of the other in the configuration "flat” or “not yet shaped” of the anchor and forming, when the anchor is shaped, the central reinforcement 20 and one of the two flats 12a.
• this fold 33 is found to coincide with the lower end of the foot of the anchor when shaped.
• the reinforcement 20 may be secured to the other flat 12b by means of a second fold 36 interposed according to FIG. 12, between two portions of flats side by side in the "flat" configuration of the anchor and forming, when the anchor is shaped, the central reinforcement 20 and the other flats 12b.
• This second fold 36 is found to coincide with an upper lateral portion of the anchor.
• the assembly of two flats to one another by means of a fold or fold of flattened integral with the two flats and forming a junction between those ci can be operated at the lower end of the anchor between the two converging branches of two constituent flats of the anchor ( Figure 8) by the fold 33, on a lateral portion of the head of the anchor ( Figure 9 ) between the two lateral edges of the two head portions of the two flats paired by the fold 36, or at the upper end of the anchor between the two upper edges of the two head portions of the two twin flats ( Figure 10) by the fold 37.
• the "pattern" from which these three anchors are formed includes: FIG.
• the flat part will comprise additional fold lines to define two slightly divergent upper limbs (for example at 15 ° with respect to the plane P), two converging upper branches joining the plane P, and a rigidity box with branches divergent at 45 ° and converging branches at an angle of about 80 °.
• the total length of this anchor may be between 100 and 400 mm, the width of the flat of 20, 25, 30, 40, 60 or 80 mm, the thickness of the flat between 3 and 8 mm
• FIG. 9 two portions of flat surface side by side united by a flattened bridge of a width of the order of two thicknesses of flat, the median line of this bridge of material being capable of forming the fold,
• FIG. 10 shows two flattened portions in the extension of one another of a length coinciding with the extended length of each flattened flat, these two flat portions being separated by a line at half length capable of forming the fold 37 and located at a constriction for forming the upper edge of the anchor of lesser width than the rest of the head and body of the anchor.
• the anchor according to the invention has major advantages over the anchors of the state of the art.
• An anchor of this type is made by a simple and inexpensive manufacturing process, based on the folding of a single or two flats allows thanks to the reinforcement to achieve the lifting of relatively heavy construction elements.
• the particularities of the embodiments such as the square, triangular or diamond shaped section of the box, the inclination at 10, 20, ... 45 [deg.]
• the presence or the the absence of diverging upper branches within the body of the anchor, their number can be combined with each other to define an optimal anchorage according to the building element to be lifted.
• one or more reinforcements may be interposed between the flats of the anchor, these reinforcements may also have different shapes outside the flats.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Reinforcement Elements For Buildings (AREA)
• Joining Of Building Structures In Genera (AREA)
• Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=54848689

Family Applications (1)

Country Status (6)

Families Citing this family (3)

Family Cites Families (5)

• 2015
  • 2015-08-14 FR FR1557735A patent/FR3040053A1/fr not_active Ceased
• 2016
  • 2016-01-28 WO PCT/FR2016/050181 patent/WO2017029439A1/fr active Application Filing
  • 2016-01-28 CN CN201680048036.4A patent/CN108474214A/zh active Pending
  • 2016-01-28 EP EP16707849.2A patent/EP3334874A1/de not_active Withdrawn
  • 2016-01-28 US US15/752,406 patent/US20190003192A1/en not_active Abandoned
  • 2016-01-28 AU AU2016308573A patent/AU2016308573A1/en not_active Abandoned

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