Field of the invention

The invention relates to a shear reinforcement system for embedding in flat slabs such as slab floors as defined in the preamble of independent claim 1.

Publication DE 10 2004 018 0051 Ul presents a shear reinforcement system for a slab floor having elongate shear reinforcement members to be positioned transverse to the plane of the slab floor and a support member to which the ends of several elongate shear reinforcement members are connected. The end of an elongate shear reinforcement member is connected to the support member by means of a connection member that is on one side fastened by means of a form-locking means integrated into the connection member to the end of an elongate shear reinforcement member and that on the other side penetrates a pre-defined round hole on the support member.

Publication DE 10 2004 006 618 Al presents a shear reinforcement system for a slab floor having elongate shear reinforcement members to be positioned transverse to the plane of the slab floor and a support member to which the ends of several elongate shear reinforcement members are connected. The end of an elongate shear reinforcement member is connected to the support member by means of a connection member that is on one side glued to the end of an elongate shear reinforcement member and that on the other side penetrates a pre-defined round hole on the support member.

A disadvantage with these solutions is that an elongate shear reinforcement member can only be connected to the support member at a pre-defined location. This might constitute a problem if, for example, this leads to that the elongate shear reinforcement member will be located at exactly the same place in the flat slab as a part of the reinforcement grid that also is cast into the flat slab. In a such situation the whole shear reinforcement system must be moved of the elongate shear reinforcement member has to be removed.

Objective of the invention

The object of the invention is to provide a shear reinforcement system for embedding in flat slabs which solves the above-identified problem.

Short description of the invention

The shear reinforcement system of the invention is characterized by the definitions of independent claim 1.

Preferred embodiments of the shear reinforcement system are defined in the dependent claims 2 to 10.

The invention is based on providing at least one slot hole in the form of an elongated slot hole in the support member. The elongated slot hole makes it possible to move the position of the stud with respect of the support member.

The shear reinforcement system according to the invention provides for advantages both in bottom installation in precast applications, where the studs projects upwards from a support member, and in top installation in in-situ application, where the studs projects downwards from a support member.

In bottom installation in precast applications the support member of the shear reinforcement system can firstly be installed with spacers onto the formwork for holding the support member in place in relation to the formwork, after which the slab reinforcement grid is distributed into the formwork for example by a robot. Here the shear reinforcement system according to the invention makes it possible to move the studs within the elongated slot holes so that the studs fit in the reinforcement grid when attaching the studs to the support member after that the slab reinforcement grid has been distributed into the formwork.

In case of top installation in in-situ application the whole slab reinforcement is already mounted and the shear reinforcement system has to be installed as a complete assemble unit into the slab reinforcement grid. Here shear reinforcement system according to the invention makes it possible to move the studs in relation to the support member within the elongated slot holes so that the shear reinforcement system fits into the reinforcement grid.

List of figures

In the following the invention will be described in more detail by referring to the figures, which

figure 1 is a principle view of a preferred embodiment the shear reinforcement system, figure 2 shows the shear reinforcement system shown in figure 1 as seen from under side, figure 3 shows the shear reinforcement system shown in figure 1 as seen from one side, figure 4 shows the shear reinforcement system shown in figure 1 as seen from above, figure 5 shows the shear reinforcement system shown in figure 1 as seen from under side, figure 6 shows an elongate shear reinforcement member of the shear reinforcement system shown in figure 1 ,

figure 7 the elongate shear reinforcement member shown in figure 4 as seen from one side,

figure 8 shows a connection member of the shear reinforcement system shown in figure

1,

figure 9 shows the connection member shown in figure 8 as seen from one side, figure 10 shows the connection member shown in figure 8 as seen from another side, figure 11 shows the connection member shown in figure 8 as seen from above, figure 12 shows the connection member shown in figure 8 as seen from under side, figure 13 shows a support member of the shear reinforcement system shown in figure 1, figure 14 shows the support member shown in figure 10 as seen from above, figure 15 shows the support member shown in figure 10 as seen from one side.

Detailed description of the invention

The figures 1 to 5 show an example of a shear reinforcement system 1 for embedding in flat slabs such as slab floors.

The shear reinforcement system 1 comprises elongate shear reinforcement members 2, which are to be positioned with their longitudinal axis transverse the plane of the flat slab, and a support member 3 to which several elongate shear reinforcement members 2 are to be connected or are connected to. The shear reinforcement system 1 shown in figures 1 to 5 has two elongate shear reinforcement members 2. It is obvious for a person skilled in the art that the number of elongate shear reinforcement members 2 can be larger. In the figures the support member 3 is essentially linear. It is obvious for a person skilled in the art that the support member 3 can comprise curved and linear portions and portions, which are angled in relation to such linear and curved portions.

The support member 3 is provided with at least one slot hole 4.

At least one elongate shear reinforcement member 2 is in the form of a stud 5 having a first end 6 and a second end 7 as seen in figures 6 and 7.

At least the first end 6 may be provided with a head 8. In the figures, both the first end 6 and the second end 7 are provided with a head 8.

At least one stud 5 is fastened to the support member 3 by means of a connection member 9 that is arranged between the stud 5 and the slot hole 4 in the support member 3.

The support member 3 is provided with at least one slot hole 4 in the form of an elongated slot hole 10. In the figures the elongated slot holes 10 are essentially linear. It is obvious for a person skilled in the art that the support member 3 can comprise at least one elongated slot hole 10 that is at least partly curved.

The shear reinforcement system 1 comprises a connection member 9 comprising a lower retainer 11 fastened to or to be fastened to a stud 5, an upper retainer 12 fastened or to be fastened to the support member 3, and a plate member 13 having a first side 15 on one side and a second side on the opposite side and which the plate member 13 forms a planar plate plane P. The lower retainer 11 and the upper retainer 12 are arranged to the plate member 13.

The lower retainer comprises at least one arm 17 arranged to extrude from the plate member 13 and to extend in the planar plate plane P. The lower retainer also comprises a first latching member 18 for fastening a stud to the connection member 9.

The upper retainer 12 comprises at least one second latching member 19 arranged to the second side 16 of the plate member 13 for fastening the connection member 9 to the support member 3.

A pin member 14 is arranged to the second side 16 of the plate member 13 and that is inserted into the elongated slot hole 10 of the support member 3 or that is to be insertable into the elongated slot hole 10 of the support member 3 when the connection member 9 is fastened to the support member 3 so that the connection member 9 is movable in relation to the support member 3 for a length of the support member 3 that is limited by the elongated slot hole 10. The elongated slot hole may extend in the direction of the support member.

The arm 17 and the first latching member 18 are arranged to form a latching arm such that the arm 17 and the first latching member 18 are arranged to be perpendicular or almost perpendicular to each other and to form a continuous single latching arm.

The shear reinforcement system 1 may comprise at least two latching arms.

The upper retainer 12 comprises two second latching members 19 to be fastened to the support member 3 such that the two second latching members 19 are arranged to the support member 3 on different sides of the elongated slot hole 10 in the support member 3.

The head 8 of the stud 5 is fastened to the connection member 9 by at least one first latching member 18.

The shear reinforcement system 1 may comprise a connection member 9 that is made at least partly of polymer or other synthetic material.

The support member 3 is preferably, but not necessarily, in the form of a flat bar.

The at least one first latching member 8 may comprise a release mechanism. The release mechanism can be for example such that one first latching member is made longer than the other first latching members or there can be a release lever attached to the first latching member or any other suitable release mechanism.

It is apparent to a person skilled in the art that as technology advanced, the basic idea of the invention can be implemented in various ways. The invention and its embodiments are therefore not restricted to the above examples, but they may vary within the scope of the claims.