EP4253693A1 - Entretoise - Google Patents

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Publication number
EP4253693A1
EP4253693A1 EP22164965.0A EP22164965A EP4253693A1 EP 4253693 A1 EP4253693 A1 EP 4253693A1 EP 22164965 A EP22164965 A EP 22164965A EP 4253693 A1 EP4253693 A1 EP 4253693A1
Authority
EP
European Patent Office
Prior art keywords
spacer
pressure
receiving
concrete
transport rod
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
EP22164965.0A
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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
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP22164965.0A priority Critical patent/EP4253693A1/fr
Publication of EP4253693A1 publication Critical patent/EP4253693A1/fr
Pending legal-status Critical Current

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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
    • 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
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/044—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of concrete
    • E04C2002/045—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of concrete with two parallel leaves connected by tie anchors
    • E04C2002/047—Pin or rod shaped anchors
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/044—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of concrete
    • E04C2002/045—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of concrete with two parallel leaves connected by tie anchors
    • E04C2002/048—Bent wire anchors

Definitions

  • connection support also known as a bracket support, preferably with an elongated connection body, having a pressure-receiving or anchoring element with a through opening, in particular for use in a multi-part stiffening body.
  • Reusable wall spacers are known (see online catalog of BGW-Bohr GmbH, accessed on February 7, 2022, 9:15 a.m. at http: // www.bgw-bohr.de / pdf / Deutsch_Getician.pdf, there page 7), by means of which two opposite sides of a standing in-situ concrete formwork can be connected to one another in such a way that the liquid concrete can be filled into the formwork, whereby this Both sides of the formwork must be kept parallel to each other. With this spacer, a spacer or transport rod is pushed into a plastic slot tube, which is thereby expanded. If the spacer or transport rod is pulled out of the slot tube, the latter returns to its original size and can easily be pulled out of the opening in the concrete part.
  • the invention of the type mentioned at the beginning is characterized in that the fixing device is connected or can be connected to the spacer or transport rod in a friction-locking or positive-locking manner to prevent displacement along the longitudinal axis in order to determine its position.
  • the longitudinal axis corresponds to the rod axis or the center or central axis of the spacer or transport rod.
  • fixing the position means that the fixing device is secured against unintentional or unwanted displacement along the rod axis.
  • the fixing device and the spacer or transport rod are detachably connected to one another However, simply pulling it out by exerting a tensile force along the rod axis is not possible. As a result, this connection can hold a hardened first concrete shell when producing the second concrete shell of a double wall.
  • the expansion of the fixing device replaces the pressure washer known from comparable devices. The pressure washer can be saved, meaning one less component is required. A large number of the components previously used to reinforce and stabilize the double walls can be replaced by the device according to the invention.
  • each of the three components of the device can also be reused.
  • pressure-retaining elements, anchoring elements or stiffening bodies can be used, which remain in the concrete part after hardening.
  • the rod can be used both as a distance control rod and as a transport rod.
  • an extension without a cone can also be used as a spacer foot on the spacer or transport rod.
  • the fixing device is designed to exert magnetic adhesion and holding forces.
  • the spacer or transport rod can also be made of carbon or glass fiber reinforced epoxy resin.
  • the spacer or transport rod that determines the wall thickness can be removed from the base or the fixing device.
  • the spacer comprises the recess hollow body, preferably with a longitudinal slot (so-called slot tube) axially parallel to the longitudinal axis of the spacer or transport rod, which penetrates the hollow body wall into the interior.
  • slot tube axially parallel to the longitudinal axis of the spacer or transport rod, which penetrates the hollow body wall into the interior.
  • the fixing device is connected to one end of the spacer or transport rod by means of a Screw connection connected or connectable.
  • the magnetic force of the fixing device is no longer required so that the spacer or transport rod adheres to the fixing device. Rather, the magnetic force is only required to hold the fixing device on the magnetizable frame formwork. The magnetic force can therefore be weaker, which means that permanent magnetic material can be saved in the fixing device.
  • the spacer or transport rod is provided with an external thread, for example Dywidag DW15 external thread. This allows the spacer or transport rod to be screwed into the fixing device, in particular into the base. This allows you to change the overall length of the spacer and thus the thickness of the concrete part to be manufactured to a certain extent, for example by a few centimeters.
  • the external thread makes it easier to pull the spacer or transport rod out of the slot tube because there is less contact surface between the outer jacket of the spacer or transport rod and the inner jacket of the slot tube.
  • screw connections common tools can be used to loosen the spacers.
  • the spacer or transport rod can be replaced during various process steps for producing a concrete wall. For example, if the space between the concrete shells is filled with a very large amount of fresh concrete, the filling and compaction pressure increases. If there is a risk that the device will not be able to maintain this pressure safely, you can remove the spacer from the concrete shells and replace it with a framework similar to frame formwork for additional safety. Only the recess tube remains in the double wall until it is finally completed. In this case, the passage in the double wall kept clear by the recess tube can be used to pass through a tension rod, which holds frame formwork in place on both sides of the double wall.
  • the spacer or transport rod is designed or can be designed with a conical extension at both longitudinal ends. Due to the conical extensions at both ends of the spacer or Transport rods or the spacer form contact or holding surfaces for the hardened concrete shells. These contact or holding surfaces essentially grip behind the concrete shells and prevent the concrete shells from being pushed apart when the space between the concrete shells is filled. Compressive or tensile forces along the longitudinal axis of the spacer or transport rod are absorbed by the cones. As a result, the further developed device can replace the steel frame formwork in conjunction with the concrete shells themselves. These frame formworks are otherwise required if the space between the hardened concrete shells has to be filled with fresh concrete.
  • a conical extension at one end of the spacer or transport rod can be provided by the base, the other conical extension by a conical cap that tapers towards its opening, which is plugged, screwed or glued onto the spacer or transport rod as a spacer foot.
  • Another advantage of conical extensions is that in the production of concrete parts, an opening created by the spacer in the concrete part is also conically expanded towards its ends, so that the spacer can be removed more easily from the concrete part.
  • an advantageous embodiment of the invention consists in designing the spacer or transport rod or the spacer at both longitudinal ends with extensions which have the same conical shape.
  • a first pressure-receiving or anchoring element which can be assigned to a first concrete part
  • a second pressure-receiving or anchoring element which can be assigned to a second concrete part
  • the first concrete part can be the first concrete shell of the double wall and the second concrete part can be the second concrete shell of the double wall.
  • the pressure-receiving or anchoring element remains in the manufactured concrete part, in the case of a double wall in the respective concrete shells.
  • the function of the first pressure-receiving or anchoring element is to absorb the load of the first produced and hardened concrete wall half or concrete shell in the precast concrete plant manufacturing process of the concrete double wall, after the latter has passed through a shaking station and is thereby compacted, dried and moved upwards to a turning station and has been turned.
  • the second double wall half can be formed with fresh concrete on the formwork base, on which the end of the spacer or its spacer or transport rod rests, with the second pressure-receiving element or anchoring element is immersed in the not yet hardened concrete of the second concrete shell.
  • the pressure-receiving or anchoring elements each have a continuous opening through which the spacer or transport rod is guided or can be guided.
  • the pressure-receiving or anchoring elements are designed with a continuous, central or central opening, for example in the manner of a thin-walled perforated plate or a thin-walled annular disk. Thin-walled corresponds to a wall thickness of 0.5 to 5 mm, preferably 1-4 mm, in particular 2-3 mm.
  • pressure-receiving or anchoring elements are designed as connecting carriers or connecting device carriers for coupling with reinforcing steel.
  • the spacer or transport rod is guided or can be guided through this opening.
  • the stiffening body also serves as a centering aid for the spacer.
  • the pressure-receiving or anchoring elements are part of a stiffening body formed, wherein the pressure-receiving or anchoring elements are connected to one another by a connecting device.
  • stiffening body replaces pressure washers known from German patent application 10 2021 129 101.1 and further develops them.
  • Such a device can replace the spacers, transport anchors, torsion anchors and the frame formwork known in the prior art, which have typically been required to produce and transport the double walls.
  • For one-piece or multi-part designs of the stiffening body please refer to the following information.
  • the spacer or transport rod is partially surrounded by the connecting device of the stiffening body, the stiffening body having access for a textile coupling band or another external means of transport.
  • Devices with suitable diagonal reinforcement can also be used as transport anchors to transport the hardened double wall.
  • the device forms, for example, access for a coupling band or other transport coupling in the area of the recess tube.
  • the spacers according to the invention can therefore be used to transport the concrete parts and at the same time statically form a load-bearing reinforcement which fixes the two concrete shells of the double wall in position. i.e. protects against unintentional shifting and twisting of the concrete shells relative to one another.
  • the recess tube or the recess hollow body are formed with elastic-reversible material and are enlarged or enlargeable or modified or changeable in their diameter or inner extent by receiving the spacer or transport rod and the recess tube or the recess hollow body is further with a axially parallel longitudinal slot, which penetrates its wall into the interior of the pipe or hollow body.
  • the recess hollow body By providing the elastic-reversible recess hollow body with an axially parallel longitudinal slot, which passes through its wall into the interior of the pipe or hollow body, the recess hollow body can be expanded in diameter or in its other extent by changing the width of the axially parallel longitudinal slot Reduce. This means that it can be removed from the concrete part after the component has been completed.
  • the task mentioned at the outset is also achieved by a stiffening body, wherein the first pressure-receiving or anchoring element or the second pressure-receiving or anchoring element or the first and second pressure-receiving or anchoring elements of the stiffening body are designed to be thin-walled.
  • Thin-walled corresponds to a component, in particular a metal component, partially or completely formed with a wall thickness of 0.5 to 5 mm, preferably 1-4 mm, in particular 2-3 mm.
  • the stiffening elements provide a new method for the cost-effective production of a double wall. Due to the thin-walled design of the stiffening body, it is particularly well suited to be concreted into flowable concrete and to take on tasks to secure the position of the concrete shells by absorbing tensile, compressive, shearing and torsion forces. Threaded connections or, for example, lattice supports for sandwich walls known from the prior art can be omitted.
  • stiffening bodies When producing concrete double walls, several stiffening bodies can be distributed at regular intervals over the surface of the double wall and aligned perpendicular to the plane of the wall.
  • the stiffening body is intended to temporarily secure the position of the two concrete shells of the double wall during various manufacturing or transport stages. This means that unintentional horizontal/vertical displacement, shearing or twisting of the hardened concrete shells relative to one another is prevented. Openings in the pressure receiving elements form an additional guide for centering the spacer rod.
  • the stiffening body remains in the hardened concrete part and can therefore be lost for reuse. This disadvantage is eliminated by saving a large number of previously required anchors compensated several times. In particular, it is intended that no plastic whatsoever remains permanently in the hardened concrete part.
  • stiffening bodies designed according to the invention can be provided in the same double wall, which have different purposes depending on the design.
  • Stiffening bodies can be relatively small in size and primarily serve to secure the position of the concrete shells.
  • larger dimensioned stiffening bodies also serve as transport anchors or anchors for transport anchors or transport rods.
  • a multi-part recess body in which the pressure-receiving or anchoring elements are designed as connecting supports and can be slidably displaceable or detached on the connecting device or brought or brought into frictional contact.
  • the same pressure-receiving or anchoring elements can in particular be combined with different connecting devices.
  • the connecting device can be manufactured individually depending on the weight or dimensions of the double wall to be produced.
  • the multi-part design means that storage space can be saved when transporting or storing the kit to the construction site or to the precast factory. The stiffening bodies are then installed on site shortly before installation in the double wall.
  • the first pressure-receiving or anchoring element is designed or mounted in a resilient manner.
  • the pressure-receiving or anchoring element assigned to the base is designed or mounted elastically.
  • This pressure-receiving or anchoring element is typically used at Making the first concrete shell immersed in the flowable concrete. After the concrete has hardened, the originally elastic support also stiffens.
  • the pressure-receiving or anchoring elements themselves can be designed to be resilient, i.e. with a thin-walled, resilient sheet metal strip. Alternatively, additional spiral springs, disc springs or resilient rubber components can be provided.
  • Stiffening bodies in which the second pressure-receiving or anchoring element is designed to be stiffened relative to the first pressure-receiving or anchoring element are particularly suitable for the production of double walls using turning stations.
  • the pressure-receiving or anchoring element i.e. the one that is immersed in the flowable concrete of the second concrete shell while the weight of the first concrete shell is on top, must have the highest possible rigidity.
  • the sheet metal strip forming the pressure-receiving or anchoring element can be folded up on its two long sides. This means that a sheet metal strip area approximately 15 mm wide is bent through 90° so that the sheet metal strip has an L- or U-shaped cross-sectional profile.
  • the stiffening body is particularly easy to manufacture if the connecting device is also thin-walled.
  • the stiffening body of this embodiment is essentially cuboid-shaped, with two end faces of the cuboid being formed by the rectangular pressure-receiving or anchoring elements and two opposite long sides by rectangular sheet metal strips.
  • the stiffening body consists of four pieces of sheet metal that are welded together to form a cuboid, which leaves access on two long sides for a coupling band or an external means of transport to the transport rod.
  • Such a geometry is characterized by high strength against compressive, tensile, shear and torsional forces in order to secure the concrete shells against any relative movements to one another.
  • the connecting device is designed with reinforced concrete steel.
  • the concrete ribbed steel forms a particularly stable reinforced concrete composite with the flowable concrete when producing the concrete shells, which is why such stiffening bodies are particularly suitable in conjunction with a transport rod for further development as a transport anchor.
  • Reinforced steel is widely used and is particularly suitable for multi-part transport anchors that are installed shortly before the transport wall is manufactured.
  • Stiffening bodies can be particularly flexibly adapted to various double walls if the connecting device is designed with curved concrete ribbed steel.
  • the stiffening body By designing the stiffening body with concrete ribbed steel, the stiffening body can be particularly easily adapted to various transport tasks or to different concrete parts to be transported. In particular, automatic bending or welding machines can be used to produce transport anchors, which enables cost-effective production.
  • the anchoring of the stiffening body is further improved by designing the connecting device with bent rebar, with a strand of bent rebar forming a closed square or polygon.
  • the square or polygon can be welded to the pressure-receiving or anchoring elements or can also be inserted into pressure-receiving or anchoring elements designed as connecting supports.
  • the stiffening body is designed and arranged as an anchor cage or reinforcement cage in the space between the concrete shells.
  • the pressure-receiving or anchoring element as a connecting carrier, which has engagement devices designed and slidably displaceable or detachable or brought or brought into frictional contact with a connecting device.
  • the invention also includes a manufacturing or transport arrangement for concrete parts, using a spacer rod as a transport rod or a separate transport rod, which is surrounded by the longitudinally slotted recess hollow body described above and which is inserted into an opening in the concrete part to be transported leaves.
  • a coupling strap or another external means of transport can be attached to this.
  • the slot tube 130 is pushed over the spacer or transport rod 120 up to a stop, formed by an end-side annular wall 122 of the first conical spacer foot 123, which is fixed, detachable or integrally formed on the end of the spacer or transport rod 120.
  • the first spacer foot 123 expands along the longitudinal axis 125 towards the end of the rod and, when producing a concrete part with a breakthrough at the breakthrough end, forms a correspondingly conically widened breakthrough opening, which, after the spacer 100 has been removed from the concrete part breakthrough, through known conical ones Sealing plug can be closed.
  • the longitudinal slot 131 is widened when pushed over and the slot tube 130 is thus in its position diameter expanded.
  • the external thread 121 on the spacer or transport rod 120 reduces its contact surface and thus its friction with the inner surface of the slot tube 130, so that the spacer or transport rod 120 can be pushed into and pulled out of the slot tube 130 more easily.
  • the spacer or transport rod 120 is pulled out of the slot tube 130, the latter shrinks in diameter and can therefore be more easily pulled out of a breakthrough formed with the slot tube 130 in a freshly cast and just hardened concrete part.
  • the slot tube 130 and possibly a stiffening body 150 (cf. Figures 3, 4 , 10 ) protruding end of the spacer or transport rod 120 is inserted into a central bore 142 of the base 140 until the base 140 with its conically tapered end is attached to the slot tube 130 or to the stiffening body 150 (cf. Figures 3, 4 , 10 ) triggers.
  • the end section of the spacer or transport rod 120, which is intended for insertion into the base 140, and the bore 142 of the base 140 are designed for a positive or complementary engagement.
  • the rotationally symmetrical base 140 which has a cylindrical basic shape, has an outer jacket that can be divided into three sections in the longitudinal direction.
  • the first section 145 which has the largest outer diameter and is located at one end of the base, tapers conically towards the other end of the base and can thus form a breakthrough entrance with complementary conicity when the opening is formed in the concrete part to be produced.
  • the first section 145 is delimited by a gradation 146 from a second, middle section 147 of the outer base casing.
  • the middle section 147 also tapers conically towards the other end of the base.
  • the third section is formed by the centering wall 144 of the centering device.
  • the support step 143 of the centering device delimits the middle section 147 from the third section (centering wall 144), which ends in the other end of the base.
  • the base 140 is formed in its central bore 142 with an internal thread 148, which is designed to complement the external thread 121 of the spacer or transport rod 120. This means that with this version the base 140 can be screwed onto the spacer or transport rod 120 in a friction or positive fit until the base 140 abuts on the opposite end wall of the slot tube 130 or the spacer or transport rod 120 runs flush with the fixing wall 149.
  • Magnetic field lines of several permanent magnets 141 installed in the base, in particular permanent magnets 141 sunk into the fixing wall 149 can be the pressure-receiving or anchoring element (cf. Figures 3, 4 , 10 ) and the spacer or transport rod 120, if these are made with magnetizable material, hold together with the base 140 and connect it to a magnetizable formwork wall or a formwork table.
  • Figures 3 and 4 show two different embodiments of a one-piece stiffening body 150 according to the invention.
  • the openings 153, 154 of the pressure-receiving or anchoring disks 151, 152 are arranged centrally on the pressure-receiving or anchoring disks 151, 152 and are aligned coaxially with respect to one another with respect to a central axis 159, so that a spacing or Transport rod 120 with the longitudinal axis 125 (cf. Figure 1 ) can be carried out through both openings 153, 154.
  • the first pressure-receiving or anchoring element 151 in cooperation with a stiffened connecting device 155, prevents the already hardened first concrete shell from "sagging" due to its own weight when producing the second concrete shell, i.e. from unintentionally approaching the second concrete shell.
  • the pressure-receiving or anchoring elements 151, 152 form enlarged contact surfaces to absorb the concrete pressure and thus replace threaded nuts on the spacer or transport rod 120 (cf. Figure 1 ).
  • the geometry essentially corresponds to a cuboid, with two end faces of the cuboid being formed by the rectangular pressure-receiving or anchoring elements 151, 152 and two opposite longitudinal sides as connecting elements 157, 158 by rectangular sheet metal strips.
  • the stiffening body 150 consists of four pieces of sheet metal, which are welded together at their ends or joints to form a cuboid, which has access 156 for a coupling band on two long sides 210 or an external means of transport to the transport rod 120 (cf. Figure 8 ).
  • This stiffening body 150 can also be referred to as a small stiffening body.
  • the stiffening body 150 is particularly suitable as a transport anchor for coupling with a coupling strap 210 (cf. Figure 8 ) or another external means of transport.
  • the stiffening body 150 comprises a connecting device 155 with connecting elements made of bent concrete ribbed steel 160, with two one-piece concrete ribbed steel strands being bent into a square or single-strand square 161, 162.
  • the ends of the bent rebar 160 to form the single-strand squares 161, 162 are welded together at a joint (not shown) or in an overlap area 163.
  • These curved single-strand squares 161, 162 are arranged at a distance from one another so that the stiffening body 150 has approximately the shape of a cube.
  • the two single-strand squares 161, 162 are connected to one another by means of two sheet metal strips 164, the ends of the sheet metal strips 164 preferably being welded in the middle to two edges 165 of the single-strand squares 161, 162.
  • the two metal strips 164 form the pressure-receiving or anchoring disks 151, 152 with the openings 153, 154 aligned coaxially with respect to a central axis 159.
  • the metal strip 164 for forming the second pressure-receiving or anchoring disk 152 can be edged up in addition to stiffening.
  • the two edges 166 of the single-strand squares 161, 162 that do not adjoin the metal strips 164 are at least partially arranged in the space between the concrete shells. Lay the edges 166 of the single-strand squares 161, 162 that are not adjacent to the sheet metal strips 164 (as well as the connecting elements 157, 158 in Figure 3 ) thus determines the wall thickness of the concrete wall to be produced using concrete shells.
  • one or more diagonal strands 167 made of rebar 160 are provided, which connect a corner area of the first single-strand square 161 with a corner area of the second single-strand square 162.
  • Additional concrete ribbed steel 160 can be welded for further stabilization, with one side surface of the cuboid Stiffening body 150 always has access to attach a coupling band 210 (cf. Figure 8 ) to the transport rod 120 must be kept clear.
  • the stiffening body according to Figure 4 can also be referred to as a large stiffening body.
  • Figure 5 shows the device 100 with a stiffening body 150 according to Figure 3
  • Figures 6 and 7 show the device 100 with a stiffening body 150 according to Figure 4
  • the spacer or transport rod 120 with the slot tube 130 surrounding it is first pushed through the central opening 154 of the second pressure-receiving or anchoring disk 152 and then through the central opening 153 of the first pressure-receiving or anchoring disk 151 until the latter reaches the conical extension of the spacer foot 123 of the rod 120 strikes, the spacer foot 123 filling the opening 154 of the pressure-receiving or anchoring disk 152 or passing through it with a positive fit.
  • the base 140 is provided with a centering device surrounding its bore 142 at the tapered end assigned to the stiffening body 150 (where it has the smallest outside diameter). This is formed with an annular support step 143 and an annular centering wall 144 of uniform diameter arranged perpendicular thereto.
  • the pressure-receiving or anchoring disk 151 is placed with its facing end face on the middle section 147 (see illustrations), the support step 143 or the centering wall 144, with the base 140 covering the opening 153 of the pressure-receiving or Anchoring disk 151 fills or is interspersed with positive locking.
  • the spacer or its spacer or transport rod 120 can stand vertically on the steel formwork floor with the pushed-on slot tube 130 or the recess hollow body and the attached stiffening body 150.
  • the standing stability can be achieved via magnetic adhesive forces from the magnetic means 141 mentioned above (cf. Figure 2 ) increase.
  • the spacer or transport rod 120 projects out of the slot tube 130 and the stiffening body 150.
  • the stiffening body 150 has an access 156 that allows one or more coupling bands 210 or other external transport means to be wrapped around the spacer or transport rod 120.
  • the slot tube 130 typically remains on the spacer or transport rod 120 until the space between the concrete shells (not shown) in the precast factory or on the construction site is filled with fresh concrete.
  • the metal strips 164 or other connecting supports 170 (cf. Figure 10 ) of the stiffening body 150 form a large area Diagonal tension reinforcement, so that the rod 120 can be used as a transport anchor for coupling with the coupling bands 210.
  • Another advantage of using the device 100 is that the concrete parts can be picked up in the precast concrete factory and also on the construction site and rotated several times about the longitudinal axis 125 of the transport rod 120 relatively easily. After the concrete part has been transported and installed, the coupling band or bands 210 are pulled again. As soon as the space is filled with fresh concrete, the spacer or transport rod 120, slot tube 130 and base 140 can be removed from the hardened concrete part and used again. Only the stiffening body 150 remains permanently in the component as a “lost” part.
  • the connecting device 155 can be formed with one or more strand bodies made of rebar 160, which are each bent into closed single-strand quadrilaterals 161,162 and then welded together in an overlap area 163. So that the pressure-receiving or anchoring elements 151, 152 can be mounted flexibly, they are designed as connecting carriers 170 or connecting device carriers.
  • the connection carrier 170 has an engagement device 174 at two ends or regions of its usually elongated connecting body 175.
  • the engagement device 174 is, for example, designed with a guide 171 which is delimited by two limiting webs 172.
  • the engagement device 174 or the guide has a central axis 176 which runs perpendicular to the central axis 159 of the openings 153, 154 or perpendicular to the longitudinal axis 125 of the spacer or transport rod 120 in the assembled state.
  • the guides 171 are dimensioned so that the rebar 160 of the connecting device 155 fits positively into the Guides 171 of the connection carrier 170 can be inserted or clicked in.
  • the connecting supports 170 are delivered as purchased parts to a prefabricated parts factory and are combined there with a connecting device 155 made of rebar 160.
  • the connection supports 170 are preferably designed as one-piece castings.
  • the stiffening body 150 is supplemented with concrete ribbed steel squares 161, 162, which were manufactured using an automatic bending machine available in the production sub-factory.
  • various mounting means 173, for example cable ties or adhesive tape according to Figure 10 the pressure-receiving or anchoring elements 151, 152 are secured against slipping relative to the reinforcing steel 160 when installed in the double wall.
  • the connecting elements 173 protect against unintentional slipping of the rebar 160 from the connecting supports 170.
  • the first pressure receiving or anchoring element 151 (not shown) is according to Figure 11 in the first already produced concrete shell 301 surrounded by hardened concrete, so that the edges 165 of the single-strand squares 161, 162 adjacent to the first pressure-receiving or anchoring element 151 are surrounded by the hardened concrete.
  • the device 100 or the stiffening body 150 can be arranged according to Fig 12 also combine with reinforcing steel mesh 301,302, which are often used as minimum reinforcement for concrete shells 300.
  • reinforcing steel mesh 301,302 are often used as minimum reinforcement for concrete shells 300.
  • 301 reinforcing steel meshes In order for 301 reinforcing steel meshes to have the correct concrete coverage, they must not rest directly on the steel formwork (not shown).
  • the invention can be used particularly advantageously in the previously described embodiments if the reinforcing steel meshes 301, 302 are attached to the base (not shown, concreted into the first concrete shell 300) or to the stiffening body 150.
  • the base, stiffening body or the spacer or transport rod 120 then pass through the spaces 303 of the reinforcing steel mat 301.
  • a first reinforcing steel mat 301 can thus be placed on the stiffening body 150, in particular on the metal strip 164 and the edges 165 of the single-strand polygons 161, 162 adjacent to the sheet metal strips 164 are stored.
  • the first reinforcing steel mat 301 is thus arranged between the stiffening body 150 and the steel casing (not shown) for the second concrete shell (not shown), the spacer foot 123 or other widening of the spacer or transport rod 120 maintaining a distance between the reinforcing steel mat 301 and the steel casing second concrete shell ensures. This ensures sufficient concrete coverage of the reinforcing steel mesh 301.
  • a second reinforcing steel mat 302 (here realized by two structural steel rods) can be threaded into the stiffening body 150, so that the second reinforcing steel mat 302 is located between the second pressure-receiving or anchoring element 152 and the space in the double wall.
  • connecting elements 304 for example cable ties or pieces of wire, the reinforcing steel meshes 301, 302 are connected to each other and to the stiffening body 150.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
EP22164965.0A 2022-03-29 2022-03-29 Entretoise Pending EP4253693A1 (fr)

Priority Applications (1)

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EP22164965.0A EP4253693A1 (fr) 2022-03-29 2022-03-29 Entretoise

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EP22164965.0A EP4253693A1 (fr) 2022-03-29 2022-03-29 Entretoise

Publications (1)

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EP4253693A1 true EP4253693A1 (fr) 2023-10-04

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB580692A (en) * 1944-02-25 1946-09-17 James Lee Whatling Improvements in shuttering structures for the building of concrete houses
DE2715277A1 (de) * 1977-04-05 1978-10-12 Karl Becher Sandwich-bauelement sowie damit hergestellte baukonstruktion
DE19923684A1 (de) * 1998-06-20 1999-12-30 Daniel Maechtle Einrichtung zum Anbringen von Bolzenankern an Betonbauwerken
US9347232B1 (en) * 2014-03-10 2016-05-24 Sidney E. Francies, III Lifting and leveling assembly for precast concrete slabs and method
US10287785B1 (en) * 2016-10-05 2019-05-14 THiN-Wall, LLC Reusable lifting apparatus for insulated precast concrete sandwich panels
EP2792805B1 (fr) 2013-04-15 2019-09-18 Kappema Fertigteilindustrie GmbH Élément de mur consistant en éléments prèfabriqués
EP2140077B1 (fr) 2007-03-26 2019-10-23 Kappema Fertigteilindustrie GmbH Pièces préfabriquée
DE102018116542A1 (de) 2018-07-09 2020-01-09 Georg Weidner Verbindungssystem mit Ankerschloss
FR3112566A1 (fr) * 2020-07-16 2022-01-21 Josselin Guicherd Organe de levage pour le levage d’un prémur.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB580692A (en) * 1944-02-25 1946-09-17 James Lee Whatling Improvements in shuttering structures for the building of concrete houses
DE2715277A1 (de) * 1977-04-05 1978-10-12 Karl Becher Sandwich-bauelement sowie damit hergestellte baukonstruktion
DE19923684A1 (de) * 1998-06-20 1999-12-30 Daniel Maechtle Einrichtung zum Anbringen von Bolzenankern an Betonbauwerken
EP2140077B1 (fr) 2007-03-26 2019-10-23 Kappema Fertigteilindustrie GmbH Pièces préfabriquée
EP2792805B1 (fr) 2013-04-15 2019-09-18 Kappema Fertigteilindustrie GmbH Élément de mur consistant en éléments prèfabriqués
US9347232B1 (en) * 2014-03-10 2016-05-24 Sidney E. Francies, III Lifting and leveling assembly for precast concrete slabs and method
US10287785B1 (en) * 2016-10-05 2019-05-14 THiN-Wall, LLC Reusable lifting apparatus for insulated precast concrete sandwich panels
DE102018116542A1 (de) 2018-07-09 2020-01-09 Georg Weidner Verbindungssystem mit Ankerschloss
FR3112566A1 (fr) * 2020-07-16 2022-01-21 Josselin Guicherd Organe de levage pour le levage d’un prémur.

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