Anchor point for covering trapezoidal steel sheet roofs with sandwich panels

Abstract

The invention relates to an anchor point for roofing trapezoidal steel sheets with sandwich panels having a hollow base (2); an anchor ring (3) is fixed to the edge (2.2) of the base (2) by a screw (4) passing through the edge of the base (2); holes (2.4) are formed in the side plates (2.1) of the base (2) in a single row. This anchor point is remarkable in that: - the size of the base (2) is adapted to the rib (02) of the sandwich panel, and - in the edge (2.2) of the base (2), a recess (2.3) is formed with a bore (2.5) to receive the head (4.2) of the screw (4), the depth of which is adapted to the height of the screw head (4.2). (Fig. 2)

Description

Title of the invention: Anchor point for covering trapezoidal steel sheet roofs with sandwich panels

[0001] The subject of this utility model is an anchor point for covering trapezoidal steel sheet roofs with sandwich panels.

[0002] Sandwich panels are used to cover roofs and side walls, as well as to create interior partitions. A sandwich panel is a prefabricated multi-layer building element, usually comprising a thermal insulation layer of varying thickness and two surrounding facing layers. The facings consist of ribbed sheets of steel, glass or plastic, with an insulating padding of varying thickness made of plastic foam (polystyrene, polyurethane) or mineral wool between them. Thanks to the padding, sandwich panels have excellent thermal insulation performance (thermal conductivity X = 0.021-0.042 W / mK).

[0003] For roof covering, trapezoidal ribbed steel sandwich panels are generally used, the structure of which is shown in Figure 1. The product consists of an outer cladding (01) with ribs (02), an inner cladding (03) and a thermal insulation padding (04) placed between them. The thickness of the mortise-and-tenon sandwich panel is 50 to 200 mm, the width of the steel sheet facing is 1000 to 1200 mm and its thickness is 0.4 to 0.6 mm. Its surface is protected by hot-dip galvanizing or polyester-based tinted coatings. The sandwich panels are fixed by screws to the joists placed every 1.5 to 3.0 m on a roof with a slope of at least 4°.The use of sandwich panels for roof coverings has several advantages: they are highly weather resistant, have a long lifespan, are quick to install since they are supplied prefabricated, they are relatively light and can be assembled precisely, without gaps or thermal bridges.

[0004] During roofing work, workers installing sandwich panels on sloping roofs are exposed to the risk of falling, given the risk of slipping, which may increase due to the wet surface of the sandwich panels. Current legislation on the prevention of accidents at work provides that when work is carried out at a height greater than 2 meters, the worker must be protected against falls from a height and the employer must provide adequate protective equipment to prevent falls. During roofing work, a safety harness attached to a safety rope provides good protection for the worker if he attaches the safety rope to an anchor point using a carabiner. In addition to the condition of the harness and the safety rope, safety is strongly conditioned by the suitability of the anchor point: in fact, the anchor point must securely hold the safety rope even if the worker unexpectedly slips onto the trapezoidal steel sheet roof covered with sandwich panels and pulls on the safety rope with his full body weight. For this reason, the anchor point must have adequate structural strength and be fixed to the roof in such a way that it does not detach from the attachment point under the indicated load.

[0005] An example of an anchor point design is presented in patent file EP 2687267 A1, which describes an anchor structure for roofing works that does not affect the waterproofing of the roof structure and is free from thermal bridges. The structure comprises an anchor rod with a mounting plate, which is fixed by passing it through the load-bearing structural element of the roof, so that the mounting plate rests securely on the load-bearing structural element. The mounting plate is fixed to the anchor rod with a nut.

[0006] Another solution is found in US patent file 2003 / 0182893 A1, where the threaded anchor point with an anchor ring is fixed to the roof beam by a screw. To maintain the roof seal, a sealing cap is placed on the part of the anchor point that protrudes from the roof.

[0007] The disadvantage of the described solutions is that they cannot be used with sandwich panels.

[0008] The solution presented at https: / / images.app.goo.gl / Jp5JtsECCGoXgsHu8 provides a fixed anchor point for covering trapezoidal steel sheet roofs with sandwich panels. This solution has a rectangular plate that connects two adjacent ribs and is fixed to the ribs with rivets. An anchor ring is screwed onto the central part of the plate. The disadvantage of this solution is that for sandwich panels with a distance between the ribs of the outer cladding of 400 mm or more, the dead weight of the anchor point is large and therefore difficult to move. In addition, the surface area of ​​the plate on the ribs is relatively small and it is held on the ribs by a line of rivets, so that if it is not properly fixed, the tensile force can tear the plate off the ribs when the safety rope is pulled.

[0009] Patent file No. SE 460135 B relates to an anchor point for a steel trapezoidal ribbed roof panel. The element consists of a hollow base with a trapezoidal cross-section, a fixing element fixed to the ridge and holes arranged in rows on the side plates. The anchor point is fixed to the roof panel by means of a screw passing through the central support unit. With this solution, the central support unit does not rest entirely on the roof panel, only a part of the inclined side plates is in contact with it. The central support unit is fixed using an angled screw that runs transversely through the rib of the roof panel, which significantly increases the cost of this solution.

[0010] Considering the disadvantages of known solutions, the objective was to provide an anchor point for the covering of trapezoidal steel sheet roofs with sandwich panels which can be reliably fixed to the sandwich panel and whose structural strength allows to safely restrain a worker who is slipping.

[0011] Another objective is to ensure that the installation of the anchor point does not damage the waterproofing and thermal bridge resistance properties of the sandwich panel roof.

[0012] We also want the anchor point to be light, its structure to be simple and its manufacture to require no special skills.

[0013] Our experiments have shown that if the anchor point is designed to be wedged onto the trapezoidal rib of the sandwich panel and is fixed to the two side plates using self-drilling screws, it can safely support the maximum possible load without impairing the watertightness of the roof structure.

[0014] In view of the above, our utility model relates to an anchor point for covering trapezoidal steel sheet roofs with sandwich panels (hereinafter referred to as "sandwich panel") which, placed on the rib of the sandwich panel used for the work, embraces the rib and can be fixed to it using self-drilling screws. Accordingly, the anchor point is provided with a hollow trapezoidal base which fits the rib of the sandwich panel by fitting it. On the edge of the rib is fixed an anchor ring which allows the carabiner of the anchor rope to be attached. To fix the anchor point to the rib, a series of holes are provided on the side plates of the base to receive self-drilling screws.

[0015] The anchor ring is held by a screw passing through the edge of the base. It is essential that the head of the screw does not protrude from the surface of the edge placed on the rib, therefore a location is provided in this inner surface to receive the head of the screw. The pressing operation creates a small bump on the surface of the edge, in which a hole is formed for the passage of the screw. A threaded hole is formed in the base of the anchor ring located on the small bump created in the edge of the base in order to receive the threaded shank of the screw.

[0016] Subsequently, we will describe the utility model in more detail by a deployment model, using a drawing, which does not limit the field of protection thereof, where

[0017] [Fig.l] shows a front view of a sandwich panel used for roof covering,

[0018] [Fig.2] illustrates the structural design of the anchor point,

[0019] [Fig.3] shows the base of the anchor point,

[0020] [Fig.4] shows the anchor ring and

[0021] [Fig.5] is a drawing of the screw that secures the anchor ring to the base.

[0022] The anchor point (1) shown in Figure No. 2 comprises the anchor ring (3) fixed by means of a screw (4) on the base (2). On the base (2), holes (2.4) are provided to receive galvanized self-drilling screws for fixing the anchor point (1) on the rib (02) of a sandwich panel.

[0023] Figure No. 3 shows the design of the base (2). The base (2) is a galvanized or sintered or stainless steel profile 400 to 500 mm long and 1 to 1.5 mm thick, with a trapezoidal section, the cavity of which is delimited by the inclined side plates (2.1) and its edge (2.2), always of the same size as the rib (02) of trapezoidal section of the sandwich panel used to cover the roof on the site in question. On the side plates (2.1), 6 to 8 holes (2.4) with a diameter of 5 to 6 mm are arranged in a row, through which the self-drilling screws can be driven to fix the anchor point (1) to the rib (02) of the sandwich panel, while maintaining the watertightness of the roof.

[0024] On the inner surface of the edge (2.2), a location (2.3) is formed by pressing to receive the head (4.2) of the screw (4, see figure no. 5) which holds the anchor ring (3). Since the anchor point (1) must fit perfectly with the rib (02) of the sandwich panel to ensure a good grip, it is important that the screw head (4.2) is well inserted into the location (2.3) and that it does not protrude from it. When pressing the location (2.3), a small bump (2.21) is formed on the outer surface of the edge (2.2), in which a hole (2.5) is formed for the passage of the screw (4) which holds the anchor ring (3) and which is used to fix the anchor ring (3) to the small bump (2.21).

[0025] Figure No. 4 shows the anchor ring (3), a commercially available industrial product made of galvanized steel which is used to connect a carabiner. The anchor ring (3) comprises a base (3.2) carrying a ring (3.1), in which a threaded hole (3.3) of size M10 to M16 is created to drive the threaded rod (4.1) of the screw (4) (see [Fig.5]), which allows the base (3.2) of the anchor ring (3) to be fixed on the small boss (2.21).

[0026] Figure No. 5 shows the screw (4) made of galvanized steel, comprising a threaded rod (4.1) and a head (4.2). The thread size is from M10 to M16 to fit the hole (3.3).

[0027] It is clear from the description that the anchor point presented in the utility model meets our objectives in all respects, since its construction is simple, it can safely withstand the intended loads without damaging the structure and the tightness of the roof is maintained during use.

Claims

Claims

1. Anchor point for covering trapezoidal steel sheet roofs with sandwich panels having a hollow base (2); an anchor ring (3) is fixed to the edge (2.2) of the base (2) by a screw (4) passing through the edge of the base (2); holes (2.4) are formed in the side plates (2.1) of the base (2) in a row, characterized in that - the size of the base (2) is adapted to the rib (02) of the sandwich panel, and - in the edge (2.2) of the base (2), a location (2.3) is formed with a bore (2.5) for receiving the head (4.2) of the screw (4) whose depth is adapted to the height of the head (4.2) of the screw.

2. Anchor point according to claim 1, for covering trapezoidal steel sheet roofs with sandwich panels, characterized in that the anchor ring (3) has a threaded hole (3.3) in the base (3.2) of the anchor ring (3), which rests on the small boss (2.21) on the edge (2.2) of the base (2), this threaded hole (3.3) receiving the threaded rod (4.1) of the screw (4).

3. Anchor point according to any one of claims 1 to 2 for covering trapezoidal steel sheet roofs with sandwich panels, characterized in that the material of the base (2) is galvanized or sintered or stainless steel and that the anchor ring (3) and the screw (4) are made of galvanized steel.

Images