SE433372C - Device at a spring-groove connection - Google Patents

Description

8102lf16 ~ 8 Z Figure 1 shows a section perpendicular to the surface of the base board and through a joint between relatively thick boards and Figure 2 shows a similar section through a relatively thin base board.

Figure 1 shows a section through a joint between a first board 1 and a second board 2. The section is taken perpendicular to the surface plane 3 of the flat boards 1,2, the two boards 1, 2, which are made of a non-moisture-absorbing material , for example a foam plastic with closed cells together form a so-called base plate, which is intended to be applied to a ground layer H, for example a gravel layer or a soil layer. The base plate is intended to be covered with a concrete layer 5, which forms a floor in a building.

The two discs 1,2 are connected together by means of the longitudinal grooves 6 and 7 accommodated along the adjoining disc edges 6 and 7 and thus cooperating springs 9. The groove has side walls 10 and 11 and a bottom 12. The spring 9 has side walls 13 and lä and a top surface 15 . In the exemplary embodiment shown in Figure 1, a base plate of cellular plastic with a thickness of 150 mm is illustrated.

In this example, the disc 1 has three grooves with a bottom width A of 20 mm and a depth B of 15 mm. Each spring has a height C of 1H'mm. Thus, when joining the two discs 1 and 2, a gap 16 will arise between the top surface 15 of the respective spring and the bottom 12 of the cooperating groove, which gap extends continuously along the entire spring and the groove, respectively. These gaps 16 form capillary barriers which prevent water or moisture in the soil layer U from rising through the base plate. The gap height in the specified embodiment is 1 mm and this value can be made slightly smaller and of course also larger. 0.4-0.6 mm can be stated as a minimum value. As can be seen from Figure 1, a free gap 18 is suitably provided in the longitudinal joint in the surface facing the ground layer, while on the other hand the upper joint 19 facing the concrete layer is suitably dense, i.e. the two boards 1,2 have edge surfaces which are pressed against each other.

Figure 2 illustrates a base plate with a thickness of 50 mm, the two adjacent edge portions of the plates 1 'and 2' of which have a single groove 8 and a spring 9, respectively.

The invention can be modified in various ways within the scope of the patent claims and thus springs with a substantially rectangular cross-sectional area cooperating with rectangular grooves 3 g a1o2u1e-e can be used instead of the trapezoidal springs and grooves shown.

However, this latter embodiment is preferable in view of the wedge action and thus stability of the base plate obtained.

It is understood that a larger number of rectangular discs than the two shown can be used and that, for example, each disc is provided with a groove and / or flanges around all edge surfaces. It is further understood that the number of gaps 16 may be less than the number of pairs of cooperating top surfaces and bottoms in case a large number of groove / flange connections are present between the respective disc edges and if the ground layer U is relatively dry. For manufacturing reasons, however, it is most convenient to arrange a gap 16 between each spring and groove as shown in Figure 1. Although each gap 16 is shown and described by a preferred embodiment, limited by two parallel or at least substantially parallel walls 12,15 which goes perpendicular to the two surface planes of the base plate 3, it is possible, for example, to let the side walls 10 and 11 meet so that the bottom 12 changes to a line. The capillary force-breaking effect remains, but the thermal insulation of the base plate 3 is reduced due to the increased gap volumes.

Claims (5)

8102416-8 4 P A T E N T K R A V Device in a spring-groove connection between the edge portions of discs (1,2), preferably made of cellular plastic with closed cells, which discs (1,2) together form a horizontal base disc (3) between a ground layer (N ) and a concrete layer (5), a plurality of parallel springs (9) with a respective associated groove (8) being arranged over each other along the entire respective associated edge portion, each spring (9) having two longitudinal side surfaces (13). , 1H), connected by means of a top surface (15) and each groove (8) has two longitudinal side surfaces (1D, 11), connected by means of a bottom (12) and wherein said side surfaces (10, 11, 13, 1N) are arranged to abut in pairs against each other, characterized in that each spring, possibly with the exception of the spring lying closest to the concrete layer (5), has such a height and associated groove such a depth that between the top surface (15) and the bottom (12) when joining of the two discs a continuous one arises, along which both a gap (16) facing the entire length of the disc edges with such a width between the top surface and the bottom that the formation of capillary forces in the gap is prevented. Device according to claim 1, characterized in that said side surfaces (10, 11, 13, 1U) are flat. Device according to claim 2, characterized in that the side surfaces (13.1N) of the spring (9) form an acute angle with each other and that the side surfaces (10, 11) of the groove (8) form with each other the same angle as the side surfaces of the spring. H. Device according to any one of claims 1-3, characterized in that the base plate (3) has two surfaces parallel to each other, that the top surface (15) of the spring (9) is flat, that the groove (8) has a flat bottom (12), which is parallel to the top surface (15) and that the bottom and the top surface run perpendicular to the said surfaces. 8102416-8 Device according to claim H, characterized in that the distance between the bottom (12) and the top surface (15) exceeds 0, N mm and is preferably equal to or exceeds 1 mm.