• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a transport anchor for prefabricated reinforced concrete double walls (41, 42), comprising a steel bracket (10) with a bent central portion (11) for suspending the stop means and on both sides of these subsequent, partially parallel bracket legs (12), and an intermediate is arranged according to the invention that the pressure element (20) consists of steel, and / or that sections (13) of the stirrup leg (20) arranged the stirrup legs (12), not rigidly connected to these under the male loads at least in their longitudinal direction. 12) are bent at their free ends relative to their parallel course in the direction of each other.
    公开号:CH710495A2
    申请号:CH01036/15
    申请日:2015-07-16
    公开日:2016-06-15
    发明作者:
    申请人:Ikona Ag；
    IPC主号:
    专利说明:

    TECHNICAL AREA
    The invention relates to a transport anchor for prefabricated reinforced concrete double walls, comprising a steel frame with a bent center section for suspending the stop means and on both sides of this subsequent, partially parallel stirrup legs, and arranged between the stirrup legs, with these under the male Loads in their longitudinal direction not rigidly connected pressure element.
    STATE OF THE ART
    Such a lifting anchor is known for example from DE 10 2005 009 708 B4. The pressure element is formed there from a resilient material such as wood, plastic or textile fiber reinforced concrete. The bar arms are each inserted into end-side, channel-shaped recesses of the pressure element. By a bracket in the end region of the stirrup leg, which each overlaps U-shaped, the stirrup legs are held together in their parallel orientation. At the same time the pressure element is thereby trapped between them.
    With such, provided with printing elements made of wood lifting anchors sufficiently high load capacities can be achieved in practice. These are significantly higher than those achievable with anchor types, for example, according to DE 29 706 644 U1 or DE 10 038 249 A1 carrying capacities in which pressure elements made of steel are welded onto the hanger arms. With these types of anchors, concrete spalling occurs under load. In the transport anchor according to DE 29 706 644 U1 the stirrup legs are bent at their free ends out of the plane of the steel bracket out semicircular.
    PRESENTATION OF THE INVENTION
    The invention has as its object to improve the proven transport anchor on. This object is achieved by the measures specified in claim 1.
    Thus, the invention provides, inter alia, to form the pressure element made of steel. The invention is based on the fact that for the problems encountered with steel pressure elements in the known types of anchor problems less the material of the pressure element was crucial, but rather the rigid connection of the pressure element with the bracket legs by welding. By dispensing with such a rigid connection, the invention can reuse steel as the material for the pressure pin. This results in the following advantages, among others:
    A pressure pin made of steel does not form a moisture bridge between the two shells of the double wall, as may be the case with the water receiving and forwarding pressure pin made of wood. When pouring the shells, the poured concrete does not bond absolutely tightly with the shells so that water can penetrate between the shells and the poured-in concrete. One speaks here of Hinterläufigkeit. Due to the pressure elements made of wood, the water can cross the layer of poured concrete, so that additional sealing measures may be necessary.
    Problems with the printing elements made of wood also result in the production of double walls. In this case, one of the two shells is first poured into a formwork designed with the usual lattice girders for reinforcement of this shell and provided with the required number of transport anchors. The second shell is created accordingly and after hardening the first shell is placed on top of it and pressed into the still fresh concrete. When concreting the first shell, the reinforcing elements protruding from the concrete of this shell, including the lifting anchor or anchors, are covered with a porous concrete layer, which is unfavorable for their embedment in the concrete of the second shell and in the concrete poured later between the shells. As a rule, this concrete layer is also at least partially removed by cleaning. However, as it adheres more strongly to wood than to steel, its removal from wood pressure elements is often inadequate. In the finished poured wall, the porous concrete layer forms a water-permeable layer in addition to the wood material.
    With pressure pins made of steel, a higher buckling stability can be achieved. At least steel pressure bolts can be made leaner compared to those made of wood with comparable buckling stability.
    Can be performed leaner when using a steel pin and the stirrup leg or the steel frame altogether. A slimmer version of the steel bracket, possibly using a higher quality steel, reduces the weight of the transport anchor. In the case of pressure pins made of wood, the diameter of the stirrup legs must not be less than a certain extent, in order to avoid that the stirrup legs press into the wood material under load.
    Additionally or as an alternative to the formation of the pressure element made of steel, the invention provides that portions of the stirrup legs are bent at their free ends with respect to their parallel course in the direction toward each other. The free ends are thus bent in the plane of the steel bracket. This results in the following advantages, among others:
    By bending the anchoring of the bar arms is increased in the double wall shells, but this has already been achieved by the semicircular bending of the free ends as the transport anchor according to DE 29 706 644 IN. By bending in the plane of the steel bracket protrude the free ends with appropriate dimensioning of their length from the double wall shells inside but. It is thus already apparent during or after the concreting of the double-walled shells how deeply the stirrup legs are embedded in them. Insufficient deep embedding can result in insufficient anchoring of the stirrup legs in the shells and, moreover, reduced carrying capacity of the transport anchor. Insufficient exterior concrete cover of the stirrup legs can lead to cracking, exterior spalling of concrete and, moreover, to penetration of moisture into and through the respective wall shell and ultimately to corrosion damage to the reinforcement thereof.
    Advantageous embodiments of the invention are specified in the dependent claims.
    Thus, the pressure element may be provided in each case with the front side through-stepped by the bar legs recesses.
    In order for the lifting anchor can be handled and assembled as a whole, the pressure element can be clamped between the stirrup legs and / or fixed by a welding stitch. However, this stitching must not be so strong that, between the pressure element and the stirrup legs results in a rigidly behaving under the male loads connection. The desired possible deformation of the bar arms under load in the region of the pressure element can be facilitated by inserting a thin, only a few millimeters thick layer of a material softer compared to steel, in particular of a plastic material.
    The pressure element may be tubular. In this case, it is preferable if, for example, it has openings which are not covered by the stirrup legs at its ends, through which concrete can penetrate into its interior space and close it against the passage of water. Other openings could be provided for this purpose. Alternatively, the raw-shaped pressure element could be sealed in its longitudinal direction by introducing a sealant against the passage of water.
    The pressure element may be assembled from two pressure element parts and a connecting element. The connecting element can form a thermal barrier. In particular, the connecting element may be made of a fiber-reinforced polyamide. A water barrier may be attached to the connecting element, in particular in the form of a projection running around the circumference of the connecting element.
    As is also provided in the prior art, the bar arms may be connected to each other in the region of their free ends by a transverse web. As a result, the bar arms are held parallel to each other. In addition, the mentioned clamping pressure can be generated on the printing element. If the crosspiece engages around the stirrup legs in each case in a U shape and is welded to them, this also serves to reduce the required anchoring length of the stirrup legs.
    The curved center portion of the steel bracket can be made at least partially flexible. As a result, the center section for attaching the stop means can be brought into a favorable position, in particular protruding from the reinforced concrete prefabricated elements, and for the completion of the concrete wall in a favorable position, in particular between the reinforced concrete double walls. The steel bracket can consist of a steel cable. The pressure element may consist of a round or square pipe, at the ends of guide elements are attached, through which the steel cable is guided. The steel cable may have anchoring elements intended for anchoring in the reinforced concrete double walls. The distance between the pressure element and the curved center section may be at least 150 cm. The steel cable may have a length that can be guided over a length of at least 150 cm in the reinforced concrete double walls. The steel cable may have a diameter of between 5 mm to 12 mm.
    BRIEF DESCRIPTION OF THE DRAWINGS
    [0019] FIG.<Tb> FIG. 1 <SEP> a view of a transport anchor according to the invention;<Tb> FIG. 2 <SEP> the transport anchor in a side view;<Tb> FIG. 3 <SEP> the transport anchor in a partial section (I-I) with a view of three embodiments of the pressure element under a) -c);<Tb> FIG. 4 <SEP> the transport anchor in a further section (II-II) with a view of a crosspiece;<Tb> FIG. FIG. 5 shows a view of a transport anchor with a pressure element which has two parts which are connected to one another by a connecting element; FIG. and<Tb> FIG. 6 <SEP> a view of a transport anchor with a steel bracket consisting of a steel cable.
    WAYS FOR CARRYING OUT THE INVENTION
    The transport anchor shown in the figures comprises a made of a steel bar with a round cross-section steel bracket 10 with a curved center portion 11 for suspending the stop means such as a crane or a snap hook. On both sides of the central portion 11 close in sections parallel to each other arm legs 12 at. Their lower, free end portions 13 are bent towards each other. As can be seen in Fig. 2, the steel bracket 10 extends in a plane.
    At the upper end of the stirrup leg 12, a pressure element 20 is inserted between them. In the region of their free ends, but still there where they run parallel to each other, the bar arms 12 are connected by a transverse web 30 with each other.
    The pressure element 20 is made of steel and formed, for example, tubular with a rectangular or round cross-section. As shown in FIG. 3, the pressure element 20 is provided in each case with recesses 21 which are penetrated by the stirrup legs 12. In Fig. 3a), the recesses 21 are rounded and close to the bracket legs 12 at. In Fig. 3b), the recesses 21 are approximately V-shaped. In Fig. 3c) is between the pressure element 20 and the stirrup legs 12, an intermediate layer 23 made of a steel softer material, in particular a plastic material inserted. The depth of the recesses 21 is dimensioned in Fig. 3a) approximately corresponding to the diameter of the stirrup leg 12. In Fig. 3b), the pressure element 20 ends approximately at half the diameter of the stirrup leg 12. In Fig. 3c), the pressure element 20 is on both sides slightly above the hanger arms 12 before. The depth of the recesses 21 is not necessarily correlated with their shape.
    In all three embodiments of Fig. 3, the stirrup legs 12 with the pressure element 20, except that they are held positively in the recesses 21 on three sides, at least not rigidly connected. The pressure element 20 can be easily inserted between the bracket legs 12 and held between them, for example by clamping without further fixation. It would also be possible, as shown in Fig. 3b), to connect the stirrup legs 12 with the pressure element 20 by a welding stitch 23. However, such a connection or a clamping may only be so strong that the handling and assembly of the lifting anchor as a whole, on the other hand, however, certain movements of the hanger arms 12 in the recesses 21 under the conditions to be absorbed by the transport anchor loads are possible. By in the embodiment of Fig. 3c) in the recesses 21 additionally existing plastic material 23, these movements are even easier.
    If the pressure element 20 as assumed above tubular and wide enough, it is preferred if it is at its ends by the bar! 12 uncovered openings 24, as can be seen in Fig. 2. In Fig. 3, the lateral inner walls of the three printing elements 20 are indicated by dashed lines. This also shows that the printing elements 20 are open on the front side. Through the openings 24 can penetrate into the pressure element 20 when installing the transport anchor in the shells of a double wall concrete, which among other things improves its embedding in the shells. The penetrated concrete also close the pressure element against the passage of water. For this purpose, a sealing compound could be introduced into the pressure element in advance, which may be necessary especially if the pressure element 20 has only a small width, so that openings 24 are only very or possibly not present.
    As can be seen in Fig. 4, the ends 31 of the transverse web 30 are each bent in a U-shape and engage around these bent ends in each case the stirrup legs 12, wherein they are also firmly welded to these. In this way, the aforementioned clamping pressure for clamping the pressure element 20 between the stirrup legs 12 can be generated and maintained.
    In Fig. 1, two shells 41 and 42 of a reinforced concrete double wall are indicated by dashed lines, so that it can be seen how the inventive transport anchor is usually installed in such a double wall. The two inwardly bent end portions 13 protrude each case out of the shells 41 and 42 a piece out. On them it can be seen whether the transport anchor in the double wall shells 41 and 42 are properly positioned and the bar arms 12 are sufficiently covered with concrete.
    Reinforced concrete double walls are usually reinforced with elongated lattice girders. If the transport anchor 20 with the stirrup legs 12 has to be installed transversely to the longitudinal extent of the lattice girders, the crossbar 30 is in the way. Either the crosspiece 30 must be omitted for such an installation from the outset or removed, for example by sawing. In both cases, however, when concreting the double-walled shells and also thereafter at the inwardly bent ends 13 of the stirrup legs 12 can be seen whether they are properly embedded in the shells.
    For the steel strap of the inventive transport anchor preferably smooth steel grade S235 is used. Its diameter is typically in the range 13 mm-20 mm, in particular 13 mm or 15 mm. When using a higher grade steel, e.g. the grade S255, the diameter could be reduced to 10 mm. A tubular pressure element could have a wall thickness of approximately 2 mm with a rectangular cross section with external dimensions of only approximately 20 mm × 20 mm. The length of the bent end portions 13 may be between 30 mm and 100 mm. The turn does not have to be right-angled. An obtuse angle between 105 ° and 150 ° is sufficient.
    5 shows a view of a transport anchor with a pressure element 20, which is assembled from two pressure element parts 201, 202 and a connecting element 203 for the pressure element parts 201, 202. The connecting element 203 has the shape of a cuboid, wherein on two end faces cuboidal openings are formed. A first pressure element part 201 is inserted into one of the cuboid openings and a second pressure element part 202 is inserted into the other of the cuboid openings. The materials and dimensions, in particular the material of the connecting element 203 and the cross-section and length of the cuboid openings of the connecting element 203, are selected such that the assembled pressure element 20 reliably fulfills the function of achieving a high load capacity. If e.g. the length of the cuboid openings chosen too short, then the pressure element 20 can buckle at large forces.
    The connecting element 203 is made of a material which is suitable to form a thermal barrier between the two pressure element parts 201, 202. The connecting element 203 is in particular made of a fiber-reinforced polyamide.
    With an assembled pressure element 20 shown in FIG. 5 can thus achieve both a high load capacity and a heat insulation between the trays 41, 42 produce.
    As shown schematically in FIG. 5, the connecting element 203 has a water barrier 204. The water barrier 204 is formed by a circumferential projection on the circumference of the connecting element 203. The dimensioning of the projection can be adapted to the desired effectiveness of the water barrier, with a larger projection improves the effectiveness. The water barrier 204 reduces or eliminates the flow of water along the pressure element 20.
    The two pressure element parts 201, 202 may have the same length. However, it is also conceivable that the pressure element parts 201, 202 are of different lengths.
    The pressure element parts 201, 202 can be easily inserted into the connecting element 203. An adhesive may also be used to cohesively connect the pressure element parts 201, 202 to the connection element 203.
    The water barrier 204 may be arranged on an axis of symmetry of the connecting element 203. It is conceivable to arrange the water barrier 204 asymmetrically with respect to the connecting element 203. The water barrier 204 can also be completely eliminated.
    The surface of the connecting element 203 is designed in a way that adhesion of concrete or other materials is difficult or impossible. As a result, it can be ensured that no additional possibility is created for the flow of water along the pressure element 20 due to the adhesion of the materials.
    Fig. 6 shows a transport anchor with a steel bracket 10, which consists of a steel cable 18. Die Stahlbügel 10 ist mit einem Stahlbügel 10 verbunden. The two ends of the steel cable 18 are guided in the reinforced concrete double walls 41, 42. The middle section of the steel cable 18 is located between the reinforced concrete double walls 41, 42 and protrudes out of these. The distance 19 between the middle section of the steel cable 18 and the pressure element 20 is selected so that the steel cable 18 protrudes at least 150 cm from the reinforced concrete double walls. When transporting the reinforced concrete double walls 41, 42, the steel cable 18 may protrude so far that no additional steel cables must be attached to mount stop means for lifting the reinforced concrete double walls 41, 42 of a means of transport and for moving the reinforced concrete double walls 41, 42nd from the means of transport to an installation point at which the reinforced concrete double walls 41, 42 are installed. The attachment of additional steel cables, the minimum length of the reinforced concrete double walls 41, 42 may be required, for example, due to legal requirements, to avoid that a person before lifting the reinforced concrete double walls 41, 42 must climb the means of transport to the stop means mount.
    As shown schematically in Fig. 6, a pressure element 20 is provided, which is then arranged on a central region of the steel cable 18 and holds the two relevant sections of the steel cable 18 at a distance from each other. The steel cable 18 is guided at the ends of the pressure element 20, for example in guides which are attached to the ends of the pressure element 20. The guides can be designed in the form of an eye. The pressure element 20 may be designed as a round or square tube. The guides may be in the form of short tube sections. The guides may be welded to the ends of the pressure element 20. In a variant, the guides have the shape of a cylindrical tube which has a diameter of between 10 mm and 30 mm, preferably 20 mm.
    The steel cable 18 preferably has a diameter of between 5 mm and 12 mm. This results in both the required flexibility and tensile strength. The steel cable 18 preferably has a length such that it can be cast in the reinforced concrete double walls 41, 42 over a length of at least 150 cm. This results in a firm anchoring of the steel cable 18 in the reinforced concrete double walls 41, 42, as is known in ribbed or profiled reinforcing steel. The ends of the steel cord 18 may additionally be provided with anchoring elements 61, 62 for anchoring the steel cord 18 in the reinforced concrete double walls 41, 42. The anchoring elements 61, 62 can be designed in the form of rope thimbles.
    The steel cable 18 looks 150 cm out of the concrete at the top, so that a worker standing next to the wall can hit the crane hook. The wall height is between 2.5m and 3.0m.
    The steel cable 18 is flexible and can be arranged as needed so that it protrudes after installation of the transport anchor in prefabricated reinforced concrete double walls 41, 42 of the reinforced concrete double walls 41, 42 or that it is between the reinforced concrete double walls 41, 42 is located. When the steel cable 18 protrudes from the reinforced concrete double walls 41, 42, the attachment of the stop means is simplified. When the steel cable 18 is located between the reinforced concrete double walls 41, 42, the completion of a concrete wall by pouring the reinforced concrete double walls 41, 42 is simplified.
    REFERENCE LIST
    [0042]<Tb> 10 <September> steel bracket<tb> 11 <SEP> center section 11<Tb> 12 <September> stirrup leg<tb> 13 <SEP> End portions of the stirrup legs<Tb> 20 <September> print element<tb> 201, 202 <SEP> two parts of the printing element<Tb> 30 <September> crosspiece<Tb> 21 <September> recesses<Tb> 22 <September> layer<Tb> 23 <September> Stitch<Tb> 24 <September> openings<Tb> 30 <September> crosspiece<tb> 31 <SEP> ends 31 of the crosspiece<Tb> 41 <September> double wall shell<Tb> 42 <September> double wall formwork<Tb> 50 <September> connecting element<Tb> 51 <September> water barrier<Tb> 18 <September> steel cable<tb> 19 <SEP> Distance between center section and print element<tb> 61, 62 <SEP> Anchoring elements
    权利要求:
    Claims (18)
    [1]
    1. A transport anchor for prefabricated reinforced concrete double walls (41, 42), comprising: a steel bracket (10) with a bent central portion (11) for suspending the stop means and on both sides of these subsequent, partially parallel bracket legs (12), and a characterized in that the pressure element (20) consists of steel, and / or that sections (13) of the bar arms (12) arranged between the stirrup legs (12), not rigidly connected to these under the loads to be absorbed at least in their longitudinal direction. 12) are bent at their free ends relative to their parallel course in the direction of each other.
    [2]
    2. Transport anchor according to claim 1, characterized in that the pressure element (20) is provided in each case at the front side by the stirrup arms (12) through-cut recesses (21).
    [3]
    3. Transport anchor according to claim 1 or 2, characterized in that the pressure element (20) is clamped for handling purposes between the stirrup arms (21) and / or fixed by a welding stitch (23).
    [4]
    4. Transport anchor according to one of claims 1 to 3, characterized in that between the pressure element (20) and the stirrup legs (12) is only a few millimeters thick layer (22) made of a steel softer material, in particular a plastic material inserted.
    [5]
    5. Transport anchor according to claim 1 to 4, characterized in that the pressure element (20) is tubular.
    [6]
    6. Transport anchor according to claim 5, characterized in that the raw-shaped pressure element (20) at least at its ends by the stirrup legs (12) uncovered openings (24) identifies, through which concrete can penetrate into its interior.
    [7]
    7. Transport anchor according to claim 5 or 6, characterized in that the raw-shaped pressure element (20) is sealed in its longitudinal direction by introducing a sealant against the passage of water.
    [8]
    8. Transport anchor according to one of claims 1 to 7, characterized in that the bar arms (12) in the region of their free ends by a transverse web (30) are interconnected.
    [9]
    9. Transport anchor according to one of claims 1 to 8, characterized in that the pressure element (20) consists of two pressure element parts (201, 202) and a connecting element (203) is assembled.
    [10]
    10. Transport anchor according to claim 9, characterized in that the connecting element (203) forms a thermal barrier, wherein the connecting element (203) is in particular made of fiber-reinforced polyamide.
    [11]
    11. Transport anchor according to claim 9 or 10, characterized in that on the connecting element (203) a water barrier (204) is mounted, in particular in the form of a circumferential projection.
    [12]
    12. Transport anchor according to one of claims 1 to 11, characterized in that the curved central portion (11) of the steel bracket (10) is designed to be at least partially flexible.
    [13]
    13. Transport anchor according to one of claims 1 to 12, characterized in that the steel bracket (10) consists of a steel cable (18).
    [14]
    14. Transport anchor according to claim 13, characterized in that the pressure element (20) consists of a round or square pipe, at the ends of guide elements are attached, through which the steel cable (18) is guided.
    [15]
    15. Transport anchor according to claim 13 or 14, characterized in that the steel cable (18) anchoring elements (61, 62) which are provided for anchoring in the reinforced concrete double walls (41, 42).
    [16]
    16. Transport anchor according to one of claims 13 to 15, characterized in that the distance (19) between the pressure element (20) and the curved central portion (11) is at least 150 cm.
    [17]
    17. Transport anchor according to one of claims 13 to 16, characterized in that the steel cable (18) has a length that the steel cable (18) over a length of at least 150 cm in the reinforced concrete double walls (41, 42) can be performed ,
    [18]
    18. Transport anchor according to one of claims 13 to 17, characterized in that the steel cable (18) has a diameter of between 5 mm to 6 mm.
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    同族专利:
    公开号 | 公开日
    CH710498A2|2016-06-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2017-09-29| PCAR| Change of the address of the representative|Free format text: NEW ADDRESS: BELLERIVESTRASSE 203 POSTFACH, 8034 ZUERICH (CH) |
    优先权:
    申请号 | 申请日 | 专利标题
    CH01850/14A|CH710498A2|2014-12-02|2014-12-02|Transport insert for prefabricated reinforced concrete double walls.|EP15195846.9A| EP3029220B1|2014-12-02|2015-11-23|Transport anchor for prefabricated reinforced concrete double walls|
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