• 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:
    A method of attaching a lifting member (7) to a hole plate (1), in which method a hole (3) is made in the hole plate (1) which is in communication with the cavity (2) in the hole plate for inserting a flexible net (4). ) in the cavity (2) through the hole (3), sets the net (4) so that there is formed a space delimited by the net (4) in the cavity (2), casts concrete into the space delimited by the net (4) through the hole. (3) and mounting the lifting member (7) for the hole plate (1) in the hole (3) and the space delimited by the net (4) before or after the casting of the concrete.
    公开号:FI20185462A1
    申请号:FI20185462
    申请日:2018-05-18
    公开日:2019-11-19
    发明作者:Juha Pulkkanen
    申请人:Anstar Oy；
    IPC主号:
    专利说明:

    METHOD FOR ATTACHING THE LIFT TO THE HOLLOW SHEET AND THE HOLLOW SHEET
    The invention relates to a method for attaching a lifting member to a hollow plate. The invention also relates to a hollow plate.
    The hollow core slabs have traditionally been lifted from the stake grooves on the hollow core slab by lifting scissors. The problem with using stake grooves is that during casting, the stake grooves are kept low, with the risk of the scissors slipping out of the groove. To prevent this, the scissors have been modified so that a safety chain is installed underneath to prevent the plate from falling. However, the safety chain must be removed before installing the slab to remove the scissors. Then again there is a risk that the hollow plate will fall. In any case, for safety reasons, the aim is to avoid raising the slab with scissors.
    In addition, the use of narrowed and lowered hollow core slabs has increased considerably and cannot be lifted with scissors, but lifting loops are required anyway. The lifting loops are mounted so that the top surface of the cavity plate is broken at the cavity, after which the plugs are installed on both sides of the hole. The lifting loop is secured between the plugs, after which the space between the plugs is filled with concrete. Once the concrete has hardened, the slab can be lifted from the lifting loop. A disadvantage of this method is that the plugs are difficult to install and time consuming to install.
    The object of the present invention is to provide an improved method of attaching a lifting member to a hollow plate.
    The objects of the invention are achieved by the method of claim 1. In the method according to the invention, a hole is made in the cavity plate which communicates with the cavity of the cavity plate. A flexible mesh is inserted through the bore into the cavity and is arranged to form a space defined by the mesh in the cavity. In the space defined by the net, concrete is poured through the hole and into the hole and ra2
    20185462 prh 18 -05-2018 will install a hollow core lifting member before or after pouring the concrete.
    The solution according to the invention provides considerable advantages. Compared to the use of cavity-mounted plugs, the method of the invention is much faster and simpler to implement because the mesh used in the invention is easier to fit into the cavity of the slab than the plugs. In addition, the hole in the cavity slab may be smaller because the flexible mesh can be fitted from a smaller hole into the cavity than the plugs, which also speeds up the attachment of the lifting member and reduces the amount of concrete required for casting.
    The invention will now be described in more detail by way of example with reference to the accompanying drawings, in which Figure 1 is a cross-sectional view of a hollow plate having a lifting member mounted, and Figure 2 is a top view of the hollow plate of Figure 1.
    The drawings show a cavity slab 1 which is used as a load-bearing horizontal structure of buildings in the lower, intermediate and upper floors. In addition, hollow core slabs can be used as load-bearing and partition walls as well as as a baseboard and foundation beam. Hollow slabs can also be used as part of a composite slab. The cavity plate 1 has at least one or more cavities 2. The cavities 2 are longitudinal and cylindrical and make the cavity plate 1 lighter. The cavity 2 can also be used as a path for electrical wires. The hollow core slab 1 is made of concrete. Prestressed steel braids, which are generally on the underside or bottom of the hollow plate 1, are used as reinforcement for the hollow plate 1.
    The width of the hollow plate 1 is typically 1200 mm. The length of the hollow plate 1 depends on the application, the hollow plate can be up to 20 meters long. The thickness of the cavity slabs 1 varies: typical thicknesses are 150, 200, 265, 320, 370, 400 and 500 mm. The cavity plate 1 is cast on the long bed to which the tension is drawn
    20185462 prh 18 -05- 2018 wires. The casting machine is then brought to the bed and the cavity plate 1 is cast. When the cavity plate 1 has cured, it is cut into parts of the desired length.
    The lifting member 7 is secured to the cavity plate 1 by the method according to the invention. In the method, a hole 3 is made in the cavity plate 1 which communicates with the cavity 2. The hole 3 is made in the surface, typically the upper surface, of the cavity plate 1. Hole 3 is made at cavity 2. Typically, the diameter of the hole 3 is 80-140 mm.
    A flexible mesh 4 is inserted into the cavity 2 through the hole 3, the mesh 4 may be inserted through the hole 3 by hand or by using a suitable auxiliary device, for example a stick. The net 4 is inserted into the cavity 2 so that a space defined by the net 4 for concrete is formed in the cavity 2. The mesh 4 is inserted through the hole 3 into the cavity 3 so that its edge or edges extend through the hole 3 outside the cavity 2 and / or the cavity plate 1. Thereby a space defined by the net 4 is formed in the cavity 2, which can be filled with concrete through the hole 3.
    When the mesh 4 is inserted into the cavity 2, the mesh 4 is applied around the hole 3 so that concrete can be poured through the hole 3 into the space delimited by the mesh 4. In addition, the net 4 is supported during the concrete casting. This can be done, for example, by spreading the net 4 around the hole 3 and placing a locking member, such as a locking ring 5, on the net 4 to hold the net 4 in place during the casting of concrete. Prior to insertion of the locking ring 5 around the part of the net 4 outside the hole 3, an adapter ring 6 can be provided which is placed on the surface of the cavity plate 1 around the hole 3. Thereafter, the net 4 is applied over the adapter ring 6 and the locking ring 5 is placed around the adapter ring 6 on the net 4.
    The locking ring 5 has an inside diameter of 4 mm, typically 2 to 6 mm larger than the outside diameter of the adapter ring 6. The inner diameter of the adapter ring 6 is equal to or slightly larger (2-5 mm) than the diameter of the hole 3 of the hollow plate. The width (w) of the annular portion of both the adapter ring 6 and the locking ring 5 is 40 mm. The height of the adapter ring 6 and the locking ring 5 is typically 20 mm.
    20185462 prh 18 -05- 2018
    The concrete is then poured through the hole 3 into the space formed by the grid 4. Concrete is cast at the level of the upper surface of the hole 3, i.e. typically the upper surface of the hollow core slab 1. A concrete slab lifting member 7, for example a lifting loop or a lifting hook, is installed in the concrete casting. The lifting member 7 is supported in place by casting concrete. The lifting member 7 is supported, for example, on the adapter ring 6. The lifting member 7 is mounted in the concrete casting through the hole 3. Alternatively, the lifting member 7 may be installed in the hole 3 and in the space delimited by the net 4 before the concrete is cast.
    When the concrete casting has cured in the space defined by the net 4, the cavity plate 1 is lifted from the lifting member 7. Prior to this, the locking ring 5 and / or the adapter ring 6 is removed. Further, the mesh 4 is cut across the plane of the upper surface of the hollow plate 1. Also the suspension part of any lifting member 7 is removed. When the cavity plate 1 is raised, the lifting member 7 is cut off from the plane of the upper surface of the cavity plate 1 or the part of the lifting member 7 above the cavity plate 1 is removed. Two or more lifting members 7 can be secured to the same hollow plate 1 from which the hollow plate 1 is raised.
    The permeability properties of mesh 4, such as mesh size, are selected such that mesh 4 prevents the transfer of a concrete solids such as rock and cement, or at least the largest grain size solids from space 4 delimited by mesh 4 to other portions of cavity 2. On the other hand, the mesh 4 is permeable to moisture, whereby the moisture in the concrete can pass through the mesh 4. In addition, the net 4 allows concrete in the space defined by the net 4 to adhere to the wall of the cavity 2. The mesh 4 is made of a suitable material, for example plastic or textile. In addition, the mesh size of the net 4 depends e.g. the properties of the concrete used in the casting, such as the composition and consistency, and the properties of the web, such as the material and thickness of the forming yarns.
    The mesh 4 may be a mesh sack having a mouth and an oral edge extending through a hole 3 outside the cavity 2 and / or the cavity plate 1. Alternatively, the mesh 4 may be a mesh having edges extending through a hole 3 outside the cavity 2 and / or the cavity plate 1.
    权利要求:
    Claims (8)
    [1]
    A method of attaching a lifting member (7) to a cavity plate (1), comprising:
    - making a hole (3) in the cavity plate (1), which is in communication with the cavity (2) of the cavity plate, characterized in that:
    - passing a flexible mesh (4) through the hole (3) into the cavity (2),
    - positioning the net (4) such that a space defined by the net (4) is formed in the cavity (2),
    pouring concrete through the hole (3) into the space defined by the net (4), and
    - installed in the hole (3) and in the space delimited by the net (4) before or after pouring the concrete, the lifting member (7) of the slab (1).
    [2]
    Method according to claim 1, characterized in that, when the concrete casting has cured in the space defined by the net (4), the cavity slab (1) is lifted from the lifting member (7).
    [3]
    Method according to claim 1 or 2, characterized in that the mesh (4) is introduced through the hole (3) into the cavity (2) so that the edge or edges of the mesh (4) extend through the hole (3) outside the cavity (2).
    [4]
    Method according to one of the preceding claims, characterized in that the mesh (4) is a mesh sack with a mouth extending through a hole (3) outside the cavity (2) or a mesh having edges extending through a hole (3) outside the cavity (2). .
    [5]
    Method according to one of the preceding claims, characterized in that the mesh (4) is spread around the hole (3) and the mesh (4) is supported during the concrete casting.
    [6]
    Method according to Claim 5, characterized in that a locking ring (5) is placed around the hole (3) on the net (4) to support the net (4) during the concrete casting.
    [7]
    Method according to Claim 6, characterized in that an adapter ring (6) is arranged around the net (4), which is placed on the surface of the hollow plate (1) around the hole (3), the net (4) is applied over the adapter ring (6), and ) is placed around the adapter ring (6) on top of the net (4).
    [8]
    A cavity plate (1) having at least one cavity (2) and having a hole (3) communicating with the cavity (2) on its surface, characterized in that the cavity (2) is provided with a mesh (4) defining the space, in which concrete is cast and that a lifting member (7) is provided for lifting the hollow plate (1) in the hole (3) and in the concrete in the space defined by the net (4).
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    同族专利:
    公开号 | 公开日
    FI129152B|2021-08-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2021170446A1|2020-02-26|2021-09-02|Jvj Maskinteknik Aps|Method for mounting a lifting anchor in a concrete hollow core slab and a bag for use in such a method|
    法律状态:
    2021-08-13| FG| Patent granted|Ref document number: 129152 Country of ref document: FI Kind code of ref document: B |
    优先权:
    申请号 | 申请日 | 专利标题
    FI20185462A|FI129152B|2018-05-18|2018-05-18|Method for fastening a lifting element in a hollow core slab, and a hollow core slab|FI20185462A| FI129152B|2018-05-18|2018-05-18|Method for fastening a lifting element in a hollow core slab, and a hollow core slab|
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