Eaves section system

Abstract: The system comprises a first section part (8) with a covering strip (12), a downward-directed covering flange (20) at right angles thereto an upright rib (26) and a second section part (10) which encloses said rib (26), is coupled to the first section part and is provided with a second covering strip (32) above the first covering strip (12) and with at least one coupling piece (50) to be fitted between the first and second covering strip, and which is on the one hand to be coupled to the first section part (8), and to which on the other hand the second covering strip (10) is to be locked.

Description: The invention relates to an eave section assembled such as described in the preamble of claim 1, and disclosed in NL-A-8 501 985. In the eave section assembly according to NL-A-8 501 985 the coupling piece covers two adjacent first section parts and its function is to fill up the space between these parts and to seal the delation space between them. The fastening of the second, upper, section parts to the lower section parts is effected by hooking a bent - over end edge of said parts behind a short rib which protrudes from the first section parts. Practice has shown that this way of interconnecting the section parts has many disadvantages and only results into a positive fixation when all relative circumstances are perfect, which is seldom the case, because a correct cooperation between the hook-shaped part of the section (upper) section part with the rib of the first (lower) section part is only possible when both parts are perfectly straight. Consequently a perfect interconnection over the entire length of the assembly is difficult, if not possible, to obtain. Moreover changes in temperature lead to different dilations of the upper section part and the lower section part (which is shielded to some extend by the upper part), which results in that at high temperatures the upper part becomes more or less a loose fit on the lower part. Of course the inevitable tolerances during the extrusion of the sections also play their part so that, when one wants to ensure a tight fit of the upper part on the lower part under all possible circumstances one has to make all parts with their dimensions on the "safe side". This means using such dimensions that the hook must be forced by heavy blows around the edge, resulting in damage of the surface finish of the, aluminium, section and thus in corrosion. Even then roof edgings have been found in which parts of the upper section have become loose while there have also been instances in which a number of entire upper sections were stolen: one only has to pry one end edge of an upper section loose and then the entire upper section can be peeled away. The invention aims to obviate these drawbacks and this is obtained by the measures as described in the characterising clause of claim 1. The assembly according to the invention has the advantage that the second, upper, part of the assembly is fixed firmly to the first, lower, part by means of the coupling pieces which are easy to fit on the first section parts at specific intervals while the second, upper, section parts are coupled to the respectic coupling pieces by bending out the resilient lips and bringing the front edge of the second covering strip into the respective recesses. This results in a positive intercoupling of the two section parts which will remain so, even when they are great temperature fluctuations. Removal of the second section part from the first section parts is possible but then the lips of a number of coupling pieces must be bent backwardly simultaneously so that removal of a second section part by one person only (such as will be the case when one wants to steal the second section parts) is virtually impossible. It is observed that the use of a coupling piece for intercoupling a second, upper, section part with a first, lower, section part is known in itself from FR-A-1 556 699 but this known assembly is of a completely different structure and said publication does not disclose the measures according to the main claim. Further embodiments of the invention according to claim 1 are described in subclaims 2-5. The scope of the invention includes a coupling piece such as described in claim 6, while preferred embodiments of this coupling piece are subject of the claims 7-11. The invention and the advantages achieved thereby are explained with reference to the drawing, in which: Figure 1 shows a perspective view of the first section part of the eaves section system according to the invention, with coupling piece; Figure 2 shows a side view of said coupling piece; Figure 3 shows a top view of said coupling piece; Figures 4a, 4b, 4c show the three stages of the fitting of coupling piece and second section respectively on the first section part; Figure 5 is an end view of the first section part combined with a strip of resiliently compressible material before fixing of said section part; Figure 6 shows in end view the effect of the presence of this material; Figure 7 shows a coupling piece to be used at the point where two second section parts adjoin each other; Figure 8 shows a cross-section at such a second coupling piece; Figure 9 shows this cross-section on an enlarged scale; Figure 10 shows a third embodiment of the coupling piece combined with the first section part. In all figures reference number 2 indicates an eave whose front wall is indicated by reference numeral 4; the usual roof covering material is indicated by reference numeral 6. The section system according to the invention comprises, as known per se, a first section part which is indicated in its entirety by 8, and a second section part which is indicated in its entirety by 10. The first section part 8 has a first covering strip 12 which rests by means of ribs 14, 16, 18 on the roof covering material 6 and a covering flange 20 which is connected to said covering strip and rests by means of the ribs 22, 24 against the front wall 4. There is also the upright rib 26 with the first end edge 28 facing the strip 12 at an angle of about 45° and the second end edge 30 standing at right angles thereto. The second section part 10 comprises a covering strip 32 with a front edge 34 which stands virtually at right angles thereto, and which continues at one side into an end edge 36 standing virtually at right angles to said front edge and a covering flange 38 which is directed slanting downwards. At the other end the covering strip 32 merges into a slightly raised, essentially U-shaped part 40 with a front leg 42 and a second leg 44 bearing a locking rib 46 facing the front end of the section part 10. While in the section system according to the state of the art the top section part is fixed on the bottom section part by means of locking screws going through one of the legs and acting on an upright part of the first section part, for which threaded holes have to be tapped in the first section part, according to the invention specially formed coupling pieces, which are indicated by 50 in the figures, are used. Such a coupling piece is made up of an essentially prismatic body part 52 containing a bore 54 with bevelled end edge, and with a raised end edge 56 at the rear end; the front end has a downward-slanting part 58 and ends in two resilient tongues 60, 62, each with a recess 64 and a bevelled front edge 63. Figures 4a, 4b, 4c show how the second section part can be fixed on the first section part by means of this coupling piece, and how this coupling piece also facilitates the fitting of the first section part on the eaves. As can be seen from the figures, the configuration of the first end edge 56 and the second end edge 58 is complementary to that of the part enclosed by the covering strip 12, the upright rib 26 and the downward-slanting end edge 28 - this end edge part fits closely into said space - while, on the other hand, the angle between the bottom wall of the body 52 of the coupling piece and the backward-slanting part 58 is equal to the angle between the forward-sloping rib 16 and the body part 12. The result is that a coupling piece 50 can be snapped firmly onto the first section part. These first section parts are supplied in discrete lengths to the user, accompanied by the correct number of coupling pieces, which have to be fitted at the correct intervals by the user and, of course, without the covering strip 12 of the section being pre-drilled at specific intervals. This eliminates not only a preliminary processing operation, but also an unpacking and packing operation: the section parts can be delivered on directly from the extrusion factory, still in the original pack, without the risk of damage. The coupling pieces 50 which, as stated, are provided with a pre-formed hole 54, are used as a drilling jig for ensuring that the fixing hole 70 through which the fixing screw 72 passes is drilled via this hole 54 in the correct place in the covering strip. An advantage of the presence of the coupling piece here is that the forces exerted during tightening of the screw are distributed over a much larger area than in the state of the art, so that denting and buckling are prevented and the intervals can be greater than those in the state of the art (double trim), which is, of course, an advantage. An excellent seal against the penetration of water is also obtained. So when the first section parts are fitted - of course, with the necessary play of 3 mm between adjacent section parts in order to permit thermal expansion - the second section parts can be placed in a simple manner on the first section parts locked in the manner shown in Figures 4b and 4c: the edge 46 of the second section part is slotted behind the edge 30 of the first section part, and the front edge 34 of the second section part is pressed against the bevelled top edges 63 of the lips 60, 62; the lips open out and the end edge 36 comes to rest in the recesses 34. The situation according to Figure 4c, in which the second section part 10 is fixed securely on the first section part, is then obtained. It must be pointed out here that this fixing is such that even with great temperature fluctuations the second section part will not be able to come away from the first section part, while the second section parts can still be removed from the first section parts as desired: using a suitable tool, for example a wide screwdriver, the lips 60, 62 are pressed so far backwards and apart that the edge 36 is released from the recess 64, and the first section part can be pulled upwards. Removal by an unskilled, and unauthorized, person - and thus also theft - is virtually impossible. The coupling pieces fitted at regular intervals on the first section part have another beneficial effect, which could be described as a "breakwater effect". In the state of the art the entire top surface of the first covering strip is clear, and rainwater can be forced in one direction under the influence of the wind and in the end can reach a gap between two adjoining section parts. The presence of the coupling pieces prevents this: only the water pushed over the surface lying between two coupling pieces can reach this gap. As the figures show, there is a space between the ribs 14, 16 which can take a strip of compressible sealing material, in Figure 5 indicated by 80. Figure 5 shows the situation in which the first section part 8 is not yet fixed on the roof covering material 6 and the strip 80 has thus still the thickness of its unloaded state; Figure 6 shows the situation in which the first section part is screwed tight, and the sealing material, here indicated by 80a, is fully compressed. It has already been stated above that a small interval must be present between two adjacent first section parts; as a result of the compression and the presence of this interval, the sealing material will go up through the small gap at the transition between two section parts, as shown by 80b, and will form an effective seal against water 84 flowing in along the roof covering material 6 in the direction of the arrow 82. As known per se, the second section parts are fitted staggered relative to the first section parts, and a space of about 3 mm will also have to be present between the end edges of two adjacent second section parts to absorb the thermal expansion. Rainwater will be able to penetrate through these spaces to the first covering strip. Figures 7, 8 and 9 show how with a modified design of the coupling piece rainwater which penetrates through the space between two adjacent top sections is prevented from spreading over the first covering strip. Like the coupling piece 50, this coupling piece 90, shown in these figures, has the upright end edge 92, but the body part 94 is designed with a forward-sloping top surface 96, while the locking lips 98, 100, each with a locking recess 102, lie in line with the side walls 95, running at the same height, of the body part 90, so that a sort of channel is formed. The top face 96 also has a lobe 104 projecting from it. The hole 106 for a fixing screw can be formed in the body part, but this is not strictly necessary. This coupling piece 90 is placed at the point where two top section parts 10 connect to each other; the lobe 104 here determines the distance between the second section parts. Rainwater which penetrates through the space present between the adjoining top covering strips is drained away by means of the sloping surface 96. Figure 9 shows the situation according to Figure 8 on an enlarged scale; in this figure the sealing material 80a is shown as present in the space between the ribs 14 and 16, while this figure shows an eaves whose top surface, and thus also the surface of the roof covering material 6, does not run horizontally (the horizontal is indicated by 110), but slopes towards the front wall 4. Such a situation occurs frequently in practice and results in rainwater collection at one edge of the roof. Water on the roof, indicated by 112, will flow towards the eaves, but cannot pass the front rib 14; rainwater entering in the direction of the arrow 114 will actually be able to penetrate between two adjacent top sections, but will flow away downwards, since the surface 96 still slopes downwards. The penetration of rainwater to the edge of the roof covering material is thus largely avoided. Figure 10 shows in side view an embodiment of a coupling piece without raised end edge, which thus cannot be clamped onto the first section part. The coupling piece 116 shown in Figure 10 is provided at the bottom side with a raised edge 120 which is formed around the hole 110, and which fits into a corresponding bore 122 provided beforehand in the covering strip 124. For fitting the coupling piece all that is necessary is to press the thickened part 120 into the bore 126 and then fit the fixing screw. In this case, too, a uniform distribution of the forces over the covering strip 124 is obtained and buckling thereof is prevented.

Claims: Eave section assembly comprising two section parts, a first section part (8) comprising a covering strip (12) to be fitted over the roof covering material and, at a first end thereof, a covering flange (20) essentially at right angles thereto to be fitted along the outside surface of the wall adjacent to the roof, said first section part having near said first end a rib (26) extending essentially parallel to the covering flange from the opposite side of the covering strip, and a second section part (10) which encloses said rib (26), is coupled to the first section part (8) and comprises a second covering strip (32) to lie over the first covering strip (12), and with at least one coupling piece (50, 90) between the first (12) and second (32) covering strips which is coupled to the first section part (8) and extends to said first end of the first covering strip, characterised in that, the second section part (10) is coupled to the first section part (8) by means of said coupling piece, (50, 90) the front edge (34, 36) - opposite the rib (26) - of the second covering strip is bent towards said rib and fits into a recess (64, 102) formed in each of two lips 60, 62; 98, 100 which project from the adjacent edge (57) of the coupling piece and which lips (60, 62) can be bent out resiliently to fit or remove said edge from said recesses. Assembly according to Claim 1, characterized in that the upright rib (26) bears an outward-directed locking rib (30), cooperating with an inward-directed locking rib (46) engaging behind it and disposed on the part (40) of the second section part (10) which encloses said rib (26). Assembly according to Claim 2, characterized in that the upright rib (26) has an end edge (28) including an acute angle therewith and facing the end of the strip, and the coupling piece (50) is provided on a first end with a raised end edge (56) fitting into the space between said end edge (28) and the top surface of the covering strip (12). Assembly according to Claim 1-3 characterized in that the first covering strip (12) is provided near the front end with a rib (16) receding at an acute angle, and in that near the front end and at the bottom side the coupling piece is provided with a snap-in edge (58) fitting in behind it. Assembly according to Claims 1-4 characterized by projecting supporting ribs (14, 16) near the front edge of the first covering strip (12) defining a space to take a strip (80) of compressible sealing material. Coupling piece (50,90) suitable for intercoupling two sections according to claim 1, comprising; an elongate body (52,94) from which, at its first end, a coupling ridge (56,92) projects, perpendicularly to the upper surface of said body; and two lips (60,62;98,100) projecting from the opposite end of the elongate body (52,94) and extending in the plane of the body, each lip having a slit-like recess in the outer edge of the lip, in the longitudinal direction of the body, which lips can be bent out resiliently. Coupling piece according to claim 6, characterized in that the two lips (60, 62) project from the body (52) in a V-shaped configuration. Coupling piece (90) according to claim 6, which is intended in the installed position to lie at the meeting point of two sections, characterized by a body part (94) of which the upper surface (96) is bounded by two upstanding side walls (95), both extending from the first end to a short distance past the second end which latter lies below the first end, such that the upper surface of said body part slopes downwardly from the first end to the second end, the lips (100) with their recesses (102) being formed by the side-wall parts which extend past said second end. Coupling piece according to claim 8, characterised by a lobe (104) extending from the upper surface (96) over such a distance that it extends, in the installed position, to between two meeting adjacent sections, thus defining a minimum distance there between. Coupling piece according to Claims 6-8 characterized by a bore (54, 106) to take up a fixing element for fixing the first section part, in particular a screw (72, 126) Coupling piece according to claim 10, characterised in that the bore (54, 106) is surrounded by a projecting part (120), extending from the lower surface of the body part and, in the installed position, fitting in a corresponding recess (122) of the first section part.

Inventors: VAN HERPEN FREDERIK CORNELIS, VAN HERPEN, FREDERIK CORNELIS
Applicants: ALPROKON PROMOTIE ONTWIKK BV, ALPROKON PROMOTIE EN ONTWIKKELING B.V.
Application year: 1989
Main classification: E04D13
IPC codes: E04D13