EP4273349A1 - Espaceur mural à étrier en u - Google Patents

Espaceur mural à étrier en u Download PDF

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Publication number
EP4273349A1
EP4273349A1 EP22180627.6A EP22180627A EP4273349A1 EP 4273349 A1 EP4273349 A1 EP 4273349A1 EP 22180627 A EP22180627 A EP 22180627A EP 4273349 A1 EP4273349 A1 EP 4273349A1
Authority
EP
European Patent Office
Prior art keywords
spacer
concrete
leg
sleeve
contact foot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22180627.6A
Other languages
German (de)
English (en)
Inventor
Georg Weidner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP23168859.9A priority Critical patent/EP4273350A3/fr
Publication of EP4273349A1 publication Critical patent/EP4273349A1/fr
Pending legal-status Critical Current

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    • 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
    • E04G21/145—Means in or on the elements for connecting same to handling apparatus specific for hollow plates
    • 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
    • E04B1/4114—Elements with sockets
    • E04B1/4121—Elements with sockets with internal threads or non-adjustable captive nuts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/168—Spacers connecting parts for reinforcements and spacing the reinforcements from the form
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/18—Spacers of metal or substantially of metal
    • 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
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84—Walls made by casting, pouring, or tamping in situ
    • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
    • E04B2/8611—Walls made by casting, pouring, or tamping in situ made in permanent forms with spacers being embedded in at least one form leaf
    • E04B2/8617—Walls made by casting, pouring, or tamping in situ made in permanent forms with spacers being embedded in at least one form leaf with spacers being embedded in both form leaves

Definitions

  • the invention also relates to a mounting system with a spacer and a contact foot.
  • the invention generally relates to the production of concrete double walls, in particular in a precast concrete factory, from two reinforced concrete shells.
  • the concrete shells are typically manufactured in precast concrete factories and are arranged parallel to one another and at a distance from one another. The space formed by the distance can be filled on the construction site with on-site concrete or another material.
  • various fastening and anchoring devices are installed in the flowable concrete.
  • the double wall When filling the space between the double wall on the construction site with liquid concrete, the double wall in particular must be secured against concrete pressure using clamps or fasteners. Concrete pressure generally occurs when, when filling the gap between the double wall with flowable concrete, the concrete shells are pushed apart by the pressure of the concrete.
  • the AU 200 031 307 B3 relates to a double-sided magnetic holder with a base and a projection.
  • the holding device is with a strong magnetic material, such as neodymium.
  • the diameter of the projection is designed so that it can be slidably pushed into a threaded receptacle of an anchor sleeve.
  • the EP 1 045 087 B1 shows a transport anchor for anchoring formwork and scaffolding, which is cast recessed into a concrete wall.
  • a plug is provided which can be inserted into the screw channel after the recess body has been removed.
  • the US 2017 / 0 298 617 A1 relates to a mounting system with a recess body that has a conical shaft.
  • the base of the recess body can be attached to the formwork wall using a holding magnet.
  • At the tapered end of the shaft there is a further circular cylindrical shaft section onto which an anchoring means can be pushed.
  • This cylindrical section is connected to an external thread onto which a transport anchor with an anchoring ring disk can be screwed.
  • spacers are described for the production of double walls in the precast concrete factory, which are used as built-in parts in the concrete part.
  • One of these spacers has a cross structure assigned to the first concrete shell, of which a crossbar absorbs the pressure caused by gravity from the already concreted first shell, which has been turned upwards, when the second shell is concreted.
  • the task of the type mentioned at the beginning is characterized in that the first spacer leg and the second spacer leg are connected to one another at or in the area of a second leg end by a connecting bridge and the connecting bridge has a connecting device or a connecting portion for connecting the connecting bridge to a contact foot.
  • the connecting bridge between the spacer bars or legs can replace the cross structure of the spacers already known in the prior art.
  • the slipping or slipping of the first concrete shell when producing the second concrete shell is then no longer prevented by the cross structure, as in the prior art, but by the connecting bridge.
  • two spacers can be replaced by a single spacer, which has further advantageous properties.
  • a widening or other anchoring is arranged at the other end of the spacer, i.e. the end assigned to the second concrete shell. This widening, in cooperation with the connecting bridge of the first concrete shell, holds the concrete shells in position against concrete pressure when concreting the gap.
  • the first leg ends rest on the formwork wall of the formwork table using a turning station, which is why the concrete cover of the first leg ends is only minimal or eliminated entirely.
  • the leg ends are covered with plastic caps.
  • the spacer legs and the connecting bridge form the sections of a C-shaped or U-shaped bracket, wherein the spacer legs form the U or C legs and the connecting bridge forms a U or C middle section.
  • the spacer approximates a U-shape, i.e. with elongated U-legs and a U-center section that is shortened compared to the U-legs.
  • C, V, H or A shapes are also implied. To simplify matters, only the U-geometry will be used below.
  • open bracket geometries with free leg ends have proven to be particularly advantageous for producing concrete double walls compared to closed bracket geometries (e.g. curved single-strand quadrilaterals or ellipses) and can replace closed bracket geometries.
  • the free leg ends of the open bracket geometries can simply be immersed in the flowable concrete of the second concrete shell with lower resistance. As soon as the free leg ends rest on the formwork base of the second concrete shell, this can relieve the static load on the manufacturing arrangement and additionally stabilize it. If closed bracket geometries were used instead of open bracket geometries, the connecting bridge between the first leg ends would have to be very stable. This is the only way a spacer could support the load of the first concrete shell resting on it when it is immersed in the concrete of the second concrete shell without bending. Instead of a second connecting bridge, free first leg ends with widenings or other anchorings are arranged on all spacer legs.
  • the spacer can be produced particularly cost-effectively if the C-shaped or U-shaped bracket is in one piece and bent from a rod or strand material.
  • the U-bolt for the spacers can, for example, be manufactured particularly cost-effectively from BSt 500 type rebar steel.
  • the widenings can also be made as transverse or inclined webs from the same rebar as the U-bolt and then welded to the U-bolt.
  • the spacer legs form a right angle with the connecting bridge, i.e. the legs are perpendicular to the U-center section. This arrangement prevents the weight of the first concrete shell from bending the U-legs after the first concrete shell has been turned.
  • mounting systems and installation methods can also be provided in which it is advantageous if the spacer legs as U-legs each enclose a U-profile angle with the connecting bridge as a U-center section and the U-profile angle is more than 90°, preferably between 95° and 105°.
  • the first leg ends i.e. the cross structures, are first installed in a concrete shell and the connecting bridge is only then installed in another component.
  • the connecting device of the connecting bridge has a receiving passage or other placeholder through which the contact foot passes or can be enforced.
  • a support foot can be attached to the spacer through a receiving passage or another placeholder, with which the spacer can be attached to the formwork wall before the first concrete shell is produced.
  • the receiving passage or other placeholder for the contact foot is preferably arranged centrally on or in the area of the connecting bridge in order to introduce the load from the contact foot into the component as evenly as possible.
  • the receiving passage is delimited by a peripheral wall which is closed or has a transverse access for radial insertion of the contact foot.
  • a receiving passage for a contact foot can be provided particularly cost-effectively using a ring or a sleeve.
  • the ring or the sleeve are preferably welded to the connecting bridge.
  • the term sleeve is simply written, which implies a ring or a comparable connecting piece.
  • the connecting bridge preferably runs according to the circular arc of a semicircle and thus forms a curvature or groove for a receptacle for the complementary contact of the sleeve. After hardening, the sleeve remains as a lost component in the first concrete shell. Therefore, for a cost-effective variant of the spacer, provision can be made for the receiving passage to be designed with a plastic component as a sleeve.
  • the central axis of the sleeve is essentially in the same plane as the rod axes or leg axes of the spacer legs. The same applies to the central axes of the support foot or transport anchor when assembled. This means that tensile forces on the transport anchor are distributed particularly evenly across the double wall.
  • the connecting device of the connecting bridge can be connected or connected to a receiving passage belonging to the supporting foot, the receiving passage being penetrated by the connecting bridge.
  • the connecting device is designed as a central portion of the U-center section, which optionally has an additional connecting means.
  • the additional connecting means can be a welding area where the U-center section can be welded to a shaft of a mounting system.
  • the shaft of the mounting system is designed as a cross-hole sleeve.
  • the receiving passage is expediently formed as a transverse hole in a transverse hole sleeve.
  • the transverse hole sleeve can have an internal thread for screwing to an adhesive disk of the contact foot or another coupling device.
  • the receiving passage is formed with a ring or a sleeve, the ring or the sleeve having one or more means for a stop for the contact foot.
  • the sleeve can be pushed or plugged onto the contact foot using the stop. This enables quick, error-free assembly.
  • the stop ensures a minimum distance from the formwork wall and thus a minimum concrete cover for the connecting bridge.
  • the means or means for the stop are formed by means of a taper of the inner wall of the ring, the sleeve or the receiving passage.
  • the receiving passage of the sleeve forms a guide or centering for the contact foot. This secures the spacer on the contact foot against unintentional slipping in the radial direction.
  • the spacer can be secured in the axial direction, i.e. along the central axis of the receiving passage, by a threaded sleeve, whereby the threaded sleeve can be assigned to a transport anchor or other component.
  • the stop is formed by a complementary taper, i.e. by an external taper of the shaft of the contact foot and an internal taper of the sleeve.
  • the widenings or re-anchorings of the first bar ends of the spacer legs are preferably formed with cross-like structures in which at least one transverse or inclined web is welded to the spacer legs.
  • the widenings, in particular the transverse or inclined webs, of the individual spacer legs are designed separately from one another.
  • the transverse or inclined webs can be connected to one another using an additional and optional connecting rod.
  • the technical inventive task mentioned at the beginning is also solved by an assembly system.
  • the assembly system has a spacer for maintaining a distance between concrete formwork sides or concrete parts, in particular between concrete walls or the concrete shells of a concrete double wall, in particular a spacer in one of the variants already described.
  • the mounting system further includes a support foot for supporting or attaching the spacers to a formwork wall.
  • the formwork wall can be a formwork table.
  • the contact foot can also correspond to a recess body in a mounting system according to the invention.
  • the contact foot has a base, preferably a permanent magnetic adhesive disk, for attachment to a magnetizable formwork wall.
  • the base is adjoined by a preferably elongated shaft, which couples to the spacer in one of the embodiments described below and thereby ensures a distance between the spacer and the formwork wall and thus a sufficient concrete cover.
  • the contact foot can be made in one piece or in several parts. In particular, it is conceivable that holding magnets, receptacles for the spacer and the transport anchors are designed in separate components.
  • the spacer is attached or can be attached to the support foot.
  • Plug-in connections can be implemented particularly quickly and therefore cost-effectively.
  • screw connections or clamp connections can be provided, if necessary with the participation of the connecting bridge.
  • the contact foot preferably has an outer conicity or a tapered shaft, which is designed to form a stop complementary to an inner conicity or a tapered inner wall of the spacer.
  • the mounting system has a transport anchor for attaching the spacer to the support foot.
  • the transport anchor is used for coupling to an external load-carrying device or a wall support.
  • Transport anchors and spacers can therefore be mounted on a single support foot, which reduces the number of parts and speeds up the assembly process.
  • the number of transport anchors depends on how many wall supports or load-carrying devices are required to support or transport the double wall.
  • Transport anchors that are particularly advantageous for the assembly system have a cross-sectional extension for anchoring back in a concrete component, with the cross-sectional extension being penetrated by the contact foot in the assembled state.
  • the cross-sectional extension is preferably designed as an annular disk and forms additional anchoring, reinforcement or additional support for the assembly system in the concrete. After hardening, the ring disk additionally forms a contact surface for the first concrete shell and thus prevents the first concrete shell from slipping on the wall spacer when producing the second concrete shell.
  • Transport anchors with cross-sectional extensions are the yet unpublished European ones Patent applications with the application number EP 20210558.1 and EP 21182386.9 from the same applicant.
  • the contact foot preferably has an external thread or an internal thread for attaching the spacer.
  • the external thread of the contact foot preferably connects to the tapered end of the shaft as a threaded bolt and can be formed or designed to complement the internal thread of a threaded sleeve of the transport anchor.
  • the internal thread of the contact foot is alternatively or additionally formed with a hole in the end wall of the shaft and can be formed or designed to be complementary to an external thread of a transport rod of the transport anchor. Threaded connections can be installed particularly quickly and intuitively.
  • the connecting bridge of the spacer is arranged in the assembled state between the formwork wall and the external thread of the contact foot.
  • the component screwed to this external thread forms a contact with the connecting bridge or the sleeve and thus prevents the sleeve from slipping off the contact foot, in particular from the shaft of the contact foot.
  • the transport anchor comprises a transport rod, the transport rod being designed or capable of being formed with a transport rod foot with a widening or conical extension towards a transport rod end or transport rod section which is further away, opposite or spaced from the contact foot.
  • this variant of the mounting system is that this variant is sufficient for creating a double wall because the transport anchor can be coupled to an external means of transport to lift the double wall. Additional systems or spacers can be omitted, which reduces the number of parts and further simplifies storage.
  • transport anchor with transport rod for example with Dywidag DW15 external thread and slotted pipe are the still unpublished European patent application with the application number EP 22164965.1 and the as yet unpublished German patent application with the file number DE 10 2021 129 101.1 from the same applicant. Particularly advantageously, such a transport anchor can be removed from the double wall without leaving any residue and reused.
  • FIG 1 shows a first exemplary embodiment of a mounting system 200 in a disassembled state, comprising a spacer 100, a transport anchor 210 and a support foot 220a.
  • the spacer 100 includes reinforcing steel that is bent into a substantially U-shaped bracket 150.
  • the free ends of the U-legs, i.e. the spacer legs 110, 120, are in the finished double wall 300 preferably in the same concrete shell, in particular the second concrete shell 302 (cf. Figure 4 ) immersed.
  • widenings 131, 132 are provided in the area of the free ends, i.e.
  • the first leg ends 111, 121 are protected against rust by covers 113, 123, the covers 113, 123 being formed by plastic caps which are pushed onto the free leg ends 111, 121.
  • the plastic caps 113, 123 have a thickening 135 or projection for their own anchoring in the hardened concrete part.
  • a connecting bridge 140 connects the adjacent second leg ends 112, 122 and thus forms the U-center section of the U-bracket 150.
  • the spacer 100 is essentially mirror-symmetrical to a plane of symmetry, with the central axis 143 of the passage 141 or the in the plane of symmetry Sleeve 142 is located.
  • the receiving passage 141 is also formed with a sleeve 142 which is inserted into a groove 145 of the connecting bridge 140.
  • the groove 145 of the reinforcing steel essentially forms a linear contact with the outer wall of the sleeve 142.
  • the sleeve 142 is inserted into the groove 145 in a complementary or form-fitting manner.
  • the U-center section of the U-bracket 150 is in three Sections are divided, with the first section and the third section lying on an imaginary straight line or in alignment and the second middle section being curved to form a groove 145 corresponding to the sleeve 142.
  • Sleeve 142 and fillet 145 can also be welded together.
  • Figure 2 and Figure 3 show the principle of a mounting arrangement for attaching the device 100 to the formwork wall 400 before concreting.
  • the spacer 100 is placed on the support foot 220a, with the transport anchor 210 placed next to it.
  • the transport anchor 210 (shown in section) is screwed to the contact foot 220a for fastening the spacer 100 to the contact foot 220a.
  • a load-carrying device (not shown) for lifting or supporting the concrete part can be screwed to the transport anchor 210.
  • the transport anchor 210 has a cylindrical sleeve 212 with an internal thread 213.
  • An annular disk 211 is arranged as a cross-sectional extension on a first end face of the cylindrical sleeve.
  • the internal thread 213 of the sleeve 212 can be screwed to the external thread 222 of a threaded bolt 225 of the contact foot 220a, with the annular disk 211 being penetrated by the threaded bolt 225.
  • Ring disk 211 and sleeve 212 are formed in one piece, preferably produced by deep drawing.
  • the annular disk 211 can rest in contact with the sleeve 142 and/or an end wall 226 of the shaft 221.
  • Tensile loads in the area of the sleeve 212 caused by a screw-in load-carrying device can be transmitted via the annular disk 211, the sleeve 142 (in Figure 3 shown in section) and the connecting bridge 140 (in Figure 3 shown in dashed lines) evenly distributed throughout the concrete component, which improves the reinforcement.
  • the diameter D1 of the annular disk 211 of the transport anchor 210 projects beyond the diameter D2 of the sleeve 142 and can therefore form an additional anchoring surface that can be concreted into the precast concrete part in a form-fitting manner.
  • the cavity 215 allows threaded bolts from external load-carrying devices to be screwed into the transport anchor 210, the length of which exceeds the length of the threaded sleeve 212.
  • the hollow cap 214 closes the sleeve 212 in a fluid-tight manner against penetrating flowable concrete during concreting by means of a flat contact with the outer wall of the sleeve 212.
  • the hollow cap 214 can be pushed completely onto the sleeve 212 so that the hollow cap 214 touches the annular disk 211.
  • the area of the hollow cap 214 is completely or partially concreted into the concrete part.
  • the production of concrete shells is usually carried out on formwork tables, which is why the formwork wall 400 is horizontal and the assembly foot is placed on the formwork wall 400 as a contact foot 220a.
  • the spacer 100 can be held on the contact foot 220a solely by gravity.
  • the contact foot 220a is designed in such a way that, in the assembled state, the connecting bridge 140, sleeve 142 and ring disk 211 can be surrounded by flowable concrete and covered by concrete. On the one hand, this ensures a concrete cover to protect against weather influences, and on the other hand, a particularly secure anchoring of the transport anchor 210 and spacer 100 in the concrete part is created.
  • the base 224 is plate-like, with an outer taper 228.
  • the base 224 has an adhesive surface 227 for contact with the formwork wall 400 and a free surface 229 for supporting or fastening the spacer 100.
  • the base 224 has a permanent magnet to be attached to a magnetizable metallic casing wall 400.
  • the outer taper 228 makes it easier to remove the contact foot 220a from the hardened concrete part.
  • the shaft 221 adjoins the free surface 229 of the contact foot 220a.
  • the shaft 221 is designed with a gradation or with a diameter D4 that is reduced compared to the diameter D3 of the base 224 and also has an outer taper 230. The diameter D4 of the shaft 221 is therefore reduced starting from the base 224 towards the threaded bolt 225.
  • the shaft 221 ends with an end wall 226, to which the threaded bolt 225 adjoins with a reduced outside diameter D5 or a gradation.
  • the central axes 143, 217, 223 of sleeve 142, transport anchor 210 and support foot 220a coincide.
  • the means for the stop 199 are formed by the inner conicity 144 of the sleeve 142 and the complementary outer conicity 230 of the tapered shaft 221.
  • Figure 4 shows a possible installation arrangement of a spacer 100 according to the invention in a double wall 300 with a transport anchor 210 in a first embodiment and the associated contact foot 220a.
  • the connecting bridge 140 including the second leg ends 112, 122 adjacent thereto, are assigned to the first concrete shell 301.
  • the first leg ends 111, 121 are assigned to the second concrete shell 302.
  • the length of the spacer legs 110, 120 and thus the length of the U-legs of the U-bracket 150 determine the width of the space 303 between the concrete shells 301, 302.
  • the first concrete shell 301 is typically first concreted.
  • the flowable concrete is placed on a formwork table 400 (cf. Figure 2 ) is added with a shaking station on which the support foot 220a stands with a spacer 100 and, if necessary, an additional transport anchor 210.
  • the first concrete shell 301 is lifted and turned over using a turning station (not shown).
  • the first concrete shell 301 rests on the connecting bridge 140, the sleeve 142 and, if necessary, the additional transport anchor 210. By resting on these components, the first concrete shell 301 is prevented from slipping downwards. Meanwhile, the second concrete shell 302 can be formed with fresh concrete on the formwork floor. The covers 113, 123 can stand on the formwork base for the second concrete shell 302 or can be arranged at a very short distance from it. Of the several individual parts of the kit 200 (cf. Figure 3 ), the spacers 100 and, if necessary, the additional transport anchor 210 remain complete or partially in the manufactured concrete part 300.
  • the mounting system 200 can have an alternative contact foot 220b and an alternative transport anchor 240.
  • the transport anchor 240 has a spacer or transport rod 242 with an external thread 245.
  • a transport rod base 241 is formed on a first rod end 251 of the transport rod 242.
  • the transport rod foot 241 widens along the longitudinal axis 217 towards the rod end 251 and, when producing a concrete part with a breakthrough at the breakthrough end, forms a correspondingly conically widened breakthrough opening, which after removal of the transport anchor 240 from the concrete part breakthrough through known conical ones Sealing plug can be closed.
  • a recess tube 243 or cladding tube (hereinafter also “slit tube”) with a longitudinal slot (hidden) is pushed onto the transport rod 242 up to a stop 249, formed by the transport rod foot 241.
  • the second rod end 252 of the transport rod 242 protruding from the slot tube 243 and possibly a stiffening body (not shown) is screwed into a central hole (hidden) in the base 220b to form a threaded connection 244.
  • Base 224 and shaft 221 essentially correspond to the contact foot 220a already described (cf. Fig.2 ).
  • the spacer 100 is held on the shaft 221 by the holding magnets of the base 242 or by gravity.
  • additional fastening parts or assembly aids can also be provided.
  • the shaft 221 of the contact foot 220b has the Figures 5 and 6 on the end wall 226 there is an internally threaded hole (internal thread hidden) for the complementary external thread 245 of the transport rod 242.
  • the longitudinal slot is widened when pushed over and the slot tube 243 is thus expanded in diameter.
  • the external thread 245 on the transport rod 242 its Contact surface and thus its friction with the inner jacket of the slotted tube 243 is reduced, so that the transport rod 242 can be pushed into and pulled out of the slotted tube 243 more easily.
  • the transport rod 242 is pulled out of the slot tube 243, the latter shrinks in diameter and can therefore be more easily pulled out of a breakthrough formed with the slot tube 243 in a freshly cast and hardened concrete part.
  • Figure 6 shows an installation arrangement of a spacer 100 according to the invention in a double wall 300 with a transport anchor 240 in a second embodiment and the associated contact foot 220b.
  • the installation of the spacer 100 and the contact foot 220b essentially corresponds to the installation according to Figure 4 , also the production of the first concrete shell 301.
  • the free first leg ends 111, 121 of the U-bolt 150 anchored in the first concrete shell 301 emerge together with the first transport rod end 251 or the transport rod base 241 at the top in flowable concrete for the second concrete shell 302.
  • the first concrete shell 301 rests on the connecting bridge 140 and the sleeve 142.
  • the covers 113, 123 and the transport rod base 241 end on an imaginary straight line or plane and thus stand together on the formwork base for the second concrete shell 302.
  • a mounting system 200 with transport rod foot 241, transport rod 242 and contact foot 220b creates a breakthrough (not shown) in both concrete shells 301, 302 of the finished double wall 300.
  • a central section of the transport rod 242 runs in the space 303 (covered by the slotted tube 243), which can be covered by the slotted tube 243 in the assembled state.
  • this middle section of the transport rod 242 is accessible to an external lifting device (not shown).
  • a lifting strap or a coupling strap is particularly suitable for this.
  • the transport rod 242 is connected by the threaded connection 244 (cf. Figure 5 ) in the first concrete shell 301 and releasably anchored in the second concrete shell 302 by the transport rod base 241.
  • the connecting bridge 140 and the crossbars 133, 134 can serve as diagonal tension reinforcement when lifting the double wall 300.
  • the spacer 100 remains in the manufactured concrete part 300.
  • the slotted tube 243 of the transport anchor 240 enables the transport anchor 240 to be removed without leaving any residue.
  • the U-profile angle ⁇ is rectangular (cf. Figure 4 ).
  • Fig. 7 shows an alternative embodiment of a U-bracket 150 or a spacer 100, in which the spacer legs 110, 120 each enclose a U-profile angle ⁇ with the connecting bridge 140 and the U-profile angle ⁇ more than 90 °, preferably between 95 ° and 105 °, is.
  • Such alternative U-bolts 150 are particularly advantageous in conjunction with mounting systems 200 which are designed with a support foot 220b, transport rod foot 241 and a transport rod 242 (cf. Figures 5 and 6 ). This means that the first leg ends 111, 121 no longer have to bear the weight of the first concrete shell 301 by standing on the formwork table (cf. Fig. 6 ) to wear. Rather, the function is performed by the transport rod base 241.
  • the spacer legs 110, 120 are connected to one another with a continuous connecting rod 136, so that a closed profile is created.
  • Connecting rod 136 and the transverse webs 133, 134 can be formed in one piece, or the connecting rod 136 is realized as an extension of the transverse webs 133, 134.
  • the connecting rod 136 of the spacer 100 is firmly connected to the U-bracket 150, preferably by welding in the area of the transverse webs 133, 134.
  • Such a connecting rod 136 is also in the mounting system 200 according to Figure 8 arranged.
  • the contact foot 220c is made in several parts, i.e. with a separate base 224, 232 and a separate shaft 221, 231.
  • the contact foot 220c is realized with a transverse hole sleeve 231 as a shaft 221 and a nail plate 232 as a base 224.
  • the connecting device for connecting the connecting bridge 140 of the spacer 100 to the contact foot 220c is designed in which the transverse hole 233 (as
  • the Transverse hole sleeve 231 (see also https://www.bgw-bohr.de/pdf/Deutsch Bac.pdf, page 92 there, accessed on April 29, 2022 ) has a nail plate (not shown) 232 or a magnetic base 224 (cf.
  • FIG. 2 assigned internal thread, into which a complementary external thread of a threaded mandrel (hidden) of the Nagelteller 232 (https://www.bgw-bohr.de/pdf/Deutsch Automat.pdf, page 137 there, accessed on April 29, 2022 ) can be screwed in.
  • the connecting bridge 140 is expediently welded to the transverse hole sleeve 231 in the connecting section 234 in the middle of the area of the transverse hole 233 in order to prevent lateral slipping along the U-bracket 150.
  • the nail plate 232 for fixing the spacer 100 on the formwork 400 (cf. Fig. 2 ) when concreting the first concrete shell 301 (cf. Fig.
  • the U-profile angle ⁇ of this embodiment can also be 90° or more than 90°, preferably between 95° and 105°.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
EP22180627.6A 2022-05-04 2022-06-23 Espaceur mural à étrier en u Pending EP4273349A1 (fr)

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EP23168859.9A EP4273350A3 (fr) 2022-05-04 2023-04-20 Système de montage avec pied de support et écarteur mural

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EP4273349A1 true EP4273349A1 (fr) 2023-11-08

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1684447A1 (de) * 1968-03-01 1971-09-23 Superior Concrete Accessories Vorrichtung zum Anheben von Betonplatten od. dgl.
DE19949419A1 (de) * 1998-10-13 2000-05-18 Georg Weidner Gitterträger oder Transport- und Verlegeanker für Hohl- und Filigranwände
EP1045087B1 (fr) 1999-04-16 2004-11-03 DOKA Industrie GmbH Point d'accrochage protégé de la corrosion
US20170298617A1 (en) 2016-02-11 2017-10-19 Cetres Holdings, Llc Concrete anchor bodies and plugs
EP3309327A1 (fr) * 2016-10-11 2018-04-18 Econac bvba Réservoir de transport
US10060144B1 (en) * 2017-12-01 2018-08-28 Maestro International, Llc Lifting and leveling assembly for precast concrete slabs and method
US20190063088A1 (en) * 2017-08-23 2019-02-28 Midwest Concrete & Masonry Supply, Inc. Lifting anchor assembly for precast concrete structures
FR3112566A1 (fr) * 2020-07-16 2022-01-21 Josselin Guicherd Organe de levage pour le levage d’un prémur.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1684447A1 (de) * 1968-03-01 1971-09-23 Superior Concrete Accessories Vorrichtung zum Anheben von Betonplatten od. dgl.
DE19949419A1 (de) * 1998-10-13 2000-05-18 Georg Weidner Gitterträger oder Transport- und Verlegeanker für Hohl- und Filigranwände
EP1045087B1 (fr) 1999-04-16 2004-11-03 DOKA Industrie GmbH Point d'accrochage protégé de la corrosion
US20170298617A1 (en) 2016-02-11 2017-10-19 Cetres Holdings, Llc Concrete anchor bodies and plugs
EP3309327A1 (fr) * 2016-10-11 2018-04-18 Econac bvba Réservoir de transport
US20190063088A1 (en) * 2017-08-23 2019-02-28 Midwest Concrete & Masonry Supply, Inc. Lifting anchor assembly for precast concrete structures
US10060144B1 (en) * 2017-12-01 2018-08-28 Maestro International, Llc Lifting and leveling assembly for precast concrete slabs and method
FR3112566A1 (fr) * 2020-07-16 2022-01-21 Josselin Guicherd Organe de levage pour le levage d’un prémur.

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