EP3710650B1 - Device for preventing persons from falling - Google Patents

Description

The present invention relates to a modular system for assembling devices for securing people against falling, in particular from a roof, comprising a base plate that can be fastened to a substrate, a support tube that protrudes upwards from this base plate, and means for attaching a support tube arranged in the upper end region of the support tube rope, by which the person is secured against falling.

Fall protection devices of the aforementioned type have long been known from the prior art and are used in particular to secure people who work on flat roofs. Basic requirements for such fall protection, in particular with regard to its load capacity, are specified in DIN EN 795, the content of which is hereby referred to.

A fall protection with the features mentioned, for example, in the DE 10 2012 105 985 B4 described. With this fall protection, a post protruding upwards from the roof substructure is provided as a support tube, a foot plate that can be fastened to the substructure of the roof construction and is connected to the lower end of the post by gluing and a ring nut with an eyelet is located at the upper end of the post. The previously known fall arrest device further comprises a cable system inside the tubular hollow post, which is connected on the one hand to the base plate and on the other hand is connected to the ring nut via an angle at the upper end of the post.

WO 2012/021563 A2 discloses an energy absorber comprising a monolithic piece of ductile material comprising a first end and a second end. The material is formed to include at least a first longitudinally extending portion that extends continuously between the first end and the second end.

Fall protection of this type must be designed for two load cases. One load case is securing the post against impact if a person working on the roof accidentally hits the post. As a rule, a defined deformation value of 10 mm, for example, must not be exceeded with a laterally acting impact force of up to 300 kg. This is to be distinguished from the second actual load case of fall protection, according to which the device must withstand a transverse force of, for example, 1.2 t so that the tensile load occurring when a person falls from the roof via the rope attached to the eyelet is absorbed.

AT 11 927 U1 discloses fall protection for securing people on building roofs or facades, comprising a base plate that can be fastened to a substrate and on which a stop element that is fastened via a rod-shaped fastening element is arranged, the stop element being designed as a cantilever arm provided with a fastening eyelet. In order to achieve sufficient damping of the forces introduced into the ground when the person to be secured falls, it is provided that the boom between the anchorage eyelet and its connection to the fastening element is bent at least once, preferably several times, or has at least one perforation.

If you use a post (support tube) on a base plate, the tensile force acts on the post in the transverse direction via the eyelet located at the upper end of the post, which creates a moment that results in a quasi-leverage effect that prevents the base plate from tearing out the anchoring to the roof substructure. The comparatively high mass of the post used thus has an unfavorable effect in the second load case, while the post is basically oversized for the first load case.

A problem with fall protection systems of the type mentioned is that, due to different substrates of the respective roof construction, differently designed base plates are required for the support tube. Furthermore, there are country-specific standards for these fall protection devices, so that the fall protection devices have to be designed differently based on the requirements of the respective standard. In addition, there are applications in which a support tube is required, while in other cases the support tube is not required can. Depending on the design of the fall protection, it is suitable for different horizontal loads. As a result, a supplier has to produce a large number of different variants of fall protection and expensive warehousing is necessary, which takes up a lot of storage space.

This is where the present invention comes in. The object of the invention is to provide a modular system for the assembly of devices for securing people against falling of the type mentioned at the outset, which is made up of such individual components that can be combined with one another, so that a large number of variants of the Fall protection can be provided using a reduced number of individual components.

The solution to this problem provides a modular system for the assembly of devices for securing people against falling of the type mentioned with the characterizing features of the main claim.

Provision is made for the fall protection to have a modular structure, with at least two variants of support tubes of a predetermined diameter, at least two different variants of foot plates which can be detachably connected to the lower end of the support tube, and at least two different variants of means for attaching a Rope in the upper end of the support tube, which are optionally connected to the upper end of the support tube includes. Furthermore, it is provided that the at least two variants of base plates are each provided with different hole patterns and/or different numbers of holes and the at least two variants of support tubes with a tension element lying concentrically inside the support tube with different lengths, but in each case the same diameter, or are provided with a tension element lying concentrically inside the support tube and having different diameters.

The solution according to the invention is based on considerations that with a modular design of the fall protection with a basic type of the support tube, which optionally with different Foot plates on the one hand and/or with different means for attaching a rope, via which the person is secured, can be connected and thus combined, a variety of fall protection with different properties in terms of load capacity and suitability for different roof substructures can be created, as well as variants of fall protection , which can meet different country-specific standards. This modular design therefore has the advantage that the manufacturer can produce a larger number of different fall protection devices based on a smaller number of individual components, so that the number of variants to be kept in stock is significantly reduced. From the individual components, a variant of the fall protection is now assembled according to the individual specifications of the customer. Compared to known systems, such a modular design leads to a reduction in manufacturing costs and optimization of transport and storage costs.

At least two variants of base plates, each with different dimensions, are preferably provided. For example, where the roof substructure to which the fall arrest system is attached is made of wood, it may be necessary to use a base plate of larger area, whereas, for example, where the roof substructure is made of concrete or steel, base plates of smaller dimensions may be sufficient. The advantage of the modular system according to the invention in this case is that the same support tube with the internal tension element can be used with different sized base plates, so that the manufacturer can use the same variant of the support tube for different roof constructions, instead of using different support tubes for each application and to connect different base plates with each other. In this way, the manufacturer can provide the user, who carries out the assembly on site, with the support tube and the variant of the base plate required for the respective roof substructure, which he then connects with one another on site. This significantly reduces storage at the manufacturer.

At least two variants of base plates, each with different material thicknesses, are preferably provided for the system according to the invention. This will add more Possible combinations are created and the manufacturer can provide the user with a base plate that corresponds to a load calculated for the respective project. It may just as well be necessary to comply with country-specific standards that apply outside of the EU area, for example when implementing projects. In such a case, the manufacturer can also supply the same support tube, for example, and supply it with a base plate using the modular system, for example, which has a greater material thickness than is required by the current EU standards.

According to the invention, at least two variants of base plates are also provided, each with different hole patterns and/or a different number of holes. For example, the roof substructure for a particular project may require different attachment points and therefore a different hole pattern for the base plate. In such an application, for example, a support tube with the usual diameter that is also suitable for other cases can be used, but then the user is supplied with an individually adapted base plate with a different hole pattern for this special case. For the manufacturer, this procedure is much more cost-effective than recalculating and designing a complete fall arrest system for the individual case and producing it in small quantities specifically for this application.

According to the invention, the at least two variants of support tubes are provided with a tension element lying concentrically inside the support tube and with different lengths but the same diameter. This also simplifies production and storage if one starts from a support tube with a predetermined diameter, but its length may vary as required. A different length of support tube may be required, for example, if the thickness of the roof insulation varies on site. If the manufacturer starts with a tube body that is bought in standard lengths as rod goods, it is easy to cut the support tube to length as required in an application of the aforementioned type. Here, too, a new design is not necessary, but it is sufficient to adapt the length of the support tube to the project or to meet a specific standard by the manufacturer, while the base plates from the modular system that are in stock can also be used here.

In an alternative embodiment of the invention, the at least two variants of support tubes are provided with a tension element lying concentrically in the interior of the support tube, each with different diameters. In this case, too, storage and adaptation to an individual application with specified loads for the fall protection are simplified. For example, if you need two variants of support tubes, each with different diameters, to cover a number of applications, then there is a large range of variation, since these two support tube variants can be combined with the same base plates. With only two support tube variants and three different types of base plates, there are already six different combinations.

The base plate itself is preferably fixed to the ground in a manner known per se by at least one screw connection. The number and position of the required screw points determines the respective hole pattern of the base plate.

Within the scope of the system according to the invention, a first variant of means for attaching a rope in the upper end area of the support tube is preferably a ring nut or an eyelet and at least a second alternative variant of means for attaching a rope is a rope holder. So you are not limited to using a ring nut or a ring eyelet, but you can use the same type of support tube with both alternatives for attaching the cable. Since the cable holder or the ring nut or the ring eyelet can be optionally supplied by the manufacturer and mounted on the support tube by the user on site, the number of post types in stock at the manufacturer is further reduced. For example, if you use two variants for attaching the cable and three different variants of foot plates, you can already cover six different applications with one support tube variant.

A possible development of the invention provides that the support tubes have internal insulation in the cavity between the support tube and a tension element located inside the support tube.

This interior insulation serves to create a cold bridge through the metallic Posts (the support tube) to the surface of the roof (usually a flat roof) should be avoided. In some applications, however, such internal insulation is not necessary. The system according to the invention has the advantage that the same metal support tube can be used for the variant with internal insulation and for the variant without internal insulation. This doubles the number of different variants of fall protection that can be covered by just one basic type of support tube.

According to the present invention, one of the at least two base plates available in different variants is preferably provided for fastening the fall protection to a roof substructure made of wood and one of the at least two foot plates available in different variants and which can be attached to the support tube is provided for fastening the fall protection to a roof substructure Concrete, which differs in dimensions and/or material thickness and/or hole pattern from the base plate for attaching the fall arrest system to a wooden roof substructure.

According to the present invention, one of the at least two base plates, which are available in different variants, is particularly preferably provided for fastening the fall protection to a roof substructure made of wood or concrete, and one of the at least two base plates, which are available in different variants and can be attached to the support tube, is provided for fastening the fall protection a roof substructure made of steel, which differs in dimensions and/or material thickness and/or the hole pattern from the base plate for attaching the fall arrest system to a roof substructure made of wood or concrete. There are preferably at least three different variants of base plates, each suitable for attaching the fall protection to different roofs with a roof substructure made of wood, concrete or steel. In all three cases you can use the same support tube and mount it with the base plate on the roof. Each of the different variants of base plates can, if required, also be combined with differently designed support tubes which, for example, have different diameters and wall thicknesses and are therefore designed for different loads or which may be different are high, for example to adjust to the thickness of the roof insulation.

According to a further variant of the present invention, for example, one of the at least two foot plates that are available in different variants and that can be attached to the support tube can be provided for fastening the fall protection device to a roof substructure made of trapezoidal sheet metal, which differs in terms of dimensions and/or material thickness and/or hole pattern differs from the base plate for attaching the fall arrest system to a timber or concrete or steel roof substructure.

Furthermore, according to the invention, for example, at least two base plates available in different variants can be provided for fastening the fall protection to a roof substructure made of wood, comprising wooden plates with different material thicknesses, i.e. the base plate can be adapted to the material thickness of the substructure of a wooden roof construction if necessary. however, the same support tube can usually be used in both cases.

Within the scope of the present invention, for example, threaded rods, cables, tubes, threaded tubes or the like come into consideration as tension elements which are located inside the support tubes, which are preferably screwed with their lower end region to the base plate in a central region.

The features mentioned in the dependent claims relate to preferred developments of the solution to the problem according to the invention. Further advantages of the invention result from the following detailed description.

The present invention is described in more detail below using exemplary embodiments with reference to the accompanying drawings.

• Figur 1 eine Ansicht einer ersten beispielhaften Variante einer Absturzsicherung, die mittels des erfindungsgemäßen Systems konfektioniert wurde;
• Figur 1 a eine perspektivische Ansicht einer beispielhaften Fußplatte für ein erfindungsgemä-ßes modulares System;
• Figur 2 eine Ansicht einer zweiten beispielhaften Variante einer Absturzsicherung, die mittels des erfindungsgemäßen Systems konfektioniert wurde;
• Figur 3 eine Ansicht einer dritten beispielhaften Variante einer Absturzsicherung, die mittels des erfindungsgemäßen Systems konfektioniert wurde;
• Figur 3 a eine perspektivische Ansicht einer beispielhaften Fußplatte für ein erfindungsgemä-ßes modulares System;
• Figur 4 eine Ansicht einer vierten beispielhaften Variante einer Absturzsicherung, die mittels des erfindungsgemäßen Systems konfektioniert wurde;
• Figur 4 a eine perspektivische Ansicht einer beispielhaften Fußplatte für ein erfindungsgemä-ßes modulares System;
• Figur 5 eine Detailansicht einer alternativen Variante zur Anbringung eines Seils an der Absturzsicherung.

show:

• figure 1 a view of a first exemplary variant of a fall protection, which was assembled using the system according to the invention;
• figure 1 a is a perspective view of an exemplary base plate for a modular system according to the invention;
• figure 2 a view of a second exemplary variant of a fall protection, which was assembled using the system according to the invention;
• figure 3 a view of a third exemplary variant of a fall protection, which was assembled using the system according to the invention;
• figure 3 a is a perspective view of an exemplary base plate for a modular system according to the invention;
• figure 4 a view of a fourth exemplary variant of a fall protection, which was assembled using the system according to the invention;
• figure 4 a is a perspective view of an exemplary base plate for a modular system according to the invention;
• figure 5 a detailed view of an alternative variant for attaching a rope to the fall protection.

The following is initially on figure 1 referenced. This shows a schematically simplified view of a first exemplary embodiment of a fall protection device that was assembled using the system according to the invention. This includes a support tube 10, which can be fastened to a base plate 11 and, starting from this, protrudes approximately vertically upwards in the non-stressed state. The base plate 11 is in turn attached to a roof structure, in particular to the substructure of a flat roof. A tension element 12, for example a threaded rod or a cable, a tube or a threaded pipe, preferably runs concentrically in the axial direction inside the support tube 10, with the tension element 12 extending from the base plate 11 inside the support tube 10 to its upper end region . The diameter and wall thickness of the support tube 10 can vary over a wide range depending on the application, just as the diameter of the tension element 12 can vary. For example, the diameter of the support tube 10 is approximately 50 mm and the outer diameter of the tension element 12 is approximately 16 mm, so that a free space remains between the tension element 12 and the inner wall of the support tube 10, which according to a possible variant of the invention can be filled with an insulating material in order to avoid a cold bridge over the support tube down into the flat roof. As an insulating material a polyethylene or an HT material can be provided here, for example, ie a high-temperature material which has a very low and flat thermal conductivity curve within a large temperature spectrum.

A ring eyelet 13 is fastened to the upper end of the pulling element 12 on the upper side of the support tube 10 . The user can attach a snap hook (not shown) or a rope to this ring eyelet 13, for example, so that the user can hang himself there and secure himself against falling when working on the flat roof. Below the eyelet 13 there is also an upper cover plate 14 which covers the support tube at its upper end and thus protects its interior against the effects of the weather. Inside the support tube 10, a lock nut 15 is used to fix a spacer 16, which in turn can be arranged at a certain distance from the underside of the cover plate 14 and is used to center the tension element 12 within the support tube 10 and thus maintain an even distance from the inner wall of the support tube 10 to produce. A similar spacer 17 is as shown in figure 1 also provided at the lower end of the pulling element 12 in order to also center it in the support tube 10 at the bottom. Also in this lower end area there is a nut 18 on the tension element 12, which is screwed to the base plate 11 via a threaded hole approximately in the middle thereof.

The length of the support tube 10 can also vary over a wide range and, for example, lengths of 600 mm, 500 mm, 400 mm, 300 mm and additional special lengths can be provided by the manufacturer.

As part of the modular system according to the invention, different base plates with different dimensions and/or different material thicknesses are used for different roof constructions of the flat roof. The exemplary embodiment according to FIG. 1 is a base plate 11 for a wooden roof construction, in which the base plate in this case has a material thickness of approximately 8 mm, for example. Roof constructions made of wood can also be designed differently, for example it can be OSB panels (oriented strand board) act on which the base plate 11 is attached or, for example, so-called Kerto laminated veneer lumber panels, in which it is a very solid wood material mostly made of spruce wood. Alternatively, the roof construction can, for example, comprise plywood panels, for example softwood plywood panels which are open on both sides and are not sanded, which are referred to as CDX panels.

An exemplary base plate 11 for the previously described variant of a fall protection for a roof structure made of wood is in perspective in FIG figure 1 a shown. This base plate is approximately square in outline, for example, and has dimensions of 400 mm×400 mm, for example. As can be seen in the drawing, this variant of the base plate 11 has a more complex hole pattern with a larger number of holes 19, since a larger number of fastening points per unit area are required because of the wooden substructure of the roof. In the sectional view according to figure 1 these holes 19 are not shown, you can only see the screw attachment for the tension element 12 in the base plate 11.

Instead of the in figure 1 Ring eyelet 13 shown can alternative systems for attaching carabiners or ropes to the same support tube 10 according to figure 1 be attached to the top without having to change the design of the support tube in the other areas, resulting in considerable advantages for the manufacturer in terms of transport and storage costs. Such a variant is in figure 2 shown and explained in more detail below.

In the embodiment according to figure 2 a so-called cable holder 20 is fastened on the upper side of the support tube 10 by means of a nut 21 on the pulling element 12 . A cable, not shown here, of a cable system can be attached to the cable holder 20, which is designed via a so-called runner element in such a way that the secured person can use a cable or a snap hook to which they can attach themselves via, for example, a harness connected to this and attached to the body secures, can move beyond the respective support tube 10 also. In this variant, the result is that the secured person roped up has a larger radius of action when working on the roof and is not only able to work within a distance between two adjacent support tubes 10 . For this purpose, the cable holder 20 has a kind of web which is at an angle to the support tube and is provided with an eyelet at the end is, which occupies such a distance to the flight of the post. At the in figure 2 The embodiment variant of the invention shown is thus only the device for attaching a carabiner or cable at the upper end of the support tube different than in the variant of figure 1 , While the support tube 10 itself, the tension element 12 and the base plate 11 are of the same design, since the support tube is also here on a substructure of the roof, which is made of wood.

figure 3 shows an alternative embodiment of a fall protection, which was assembled using the system according to the invention, in which the support tube 10 is placed on a roof structure made of concrete. For this purpose, a differently designed base plate 11 is provided here, which has a greater material thickness of 10 mm, for example, and is equipped with fewer screw holes 20, via which the base plate 11 is screwed to the concrete roof and anchored in this way. The support tube 10 with the inner tension element 12 is designed here in principle the same as in the variant of FIG figure 1 , but has, for example, only a shorter length of, for example, 475 mm. Because the base plate can be replaced depending on the substructure of the roof, but the support tube 10 can be used independently of the roof structure, the manufacturer has advantages in terms of transport and storage costs, as already mentioned above. figure 3 a shows a perspective view of an exemplary base plate for the variant of FIG figure 3 , in which the base plate has a greater material thickness and, as can be seen, has fewer screw holes 20, since a concrete substrate results in a more favorable introduction of forces into the roof construction than a roof construction with wooden panels. In this variant, too, the base plate 11 is, for example, square, but its dimensions can be smaller than in the variant for the wooden roof construction and, for example, have dimensions of 200 mm×200 mm.

figure 4 shows another alternative variant of a fall protection, the design of the support tube 10 in principle those two variants according to figures 1 and 3 is equivalent to. However, this embodiment is intended for a roof construction with steel girders 21, for which purpose a slightly different base plate 11 is used here is, for example, has a rectangular outline and has fewer holes 19 for attachment than in the roof structure made of wood. The base plate 11 is dimensioned here so that it rests on a steel girder 21 of the roof structure and the holes 19 for fastening are provided here, for example, approximately in the middle and in the corner areas in order to screw the base plate 11 to the steel girder 21 . A perspective view of only the footplate 11 is shown in FIG figure 4 a shown separately.

For the attachment of a carabiner or a rope, alternative variants to the one shown in figure 1 Ring eyelet 13 shown can be used. For example, a so-called double eyelet 22 can be attached to the top of the support tube, which is used when two people are to attach themselves to a support tube of the fall protection at the same time. Such a double eyelet 22 is in itself figure 5 shown. As you can see, it has two separate eyelets through which a rope can be passed or to which a carabiner can be attached, so that two people can secure themselves on just one support tube 10 .

In addition to the aforementioned variants of roof constructions made of wood, concrete or steel, the invention can also be used, for example, in roof constructions made of trapezoidal sheet metal, whereby another variant of the base plate 11, not shown here in the drawing, can also be provided for this type of roof construction, which is specific to the attachment to trapezoidal sheets is designed and can be combined with a support tube 10 according to one of the variants described above.

Reference List

10

support tube

11

footplate

12

tension element

13

eyelet

14

cover plate

15

locknut

16

spacer

17

spacer

18

Mother

19

holes

20

rope holder

21

steel beam

22

double eyelet

Claims (9)

1. Modular system for assembling devices for securing persons against falling, in particular from a roof, comprising individual components which can be variably combined in accordance with the requirements for the load-bearing capacity and/or the respective roof substructure on which the fall protection device is to be fastened, wherein

   the system comprises as the first individual component at least two variants of support tubes (10) with a predetermined diameter,

   the system comprises as a second individual component at least two base plates (11) which are provided in different variants and can be selectively detachably connected to the lower end of the support tubes (10), and

   the system comprises as a third component at least two different variants of means (13, 20, 22) for attaching a rope in the upper end region of the support tubes (10), which means can be selectively connected to the upper end of the support tubes (10), and

   wherein the at least two variants of base plates (11) are provided with respectively different hole patterns and/or different numbers of holes, and the at least two variants of support tubes (10) are provided with a traction element (12) concentrically located inside the support tubes and having different lengths but the same diameter, or with a traction element (12) concentrically located inside the support tube and having different diameters.
2. Modular system according to claim 1, characterized in that the at least two variants of base plates (11) are respectively provided with different dimensions.
3. Modular system according to claim 1 or 2, characterized in that the at least two variants of base plates (11) are respectively provided with different material thicknesses.
4. Modular system according to any one of claims 1 to 3, characterized in that

   a first variant (13) of means for attaching a rope comprises a ring nut or ring eyelet (13); and

   at least a second alternative variant of means for attaching a rope comprises a rope holder (20).
5. Modular system according to any one of claims 1 to 4, characterized in that the support tubes (10) each have an internal insulation in the cavity between the support tube and the traction element (12) disposed inside the support tube.
6. Modular system according to any one of claims 1 to 5, characterized in that one of the at least two base plates (11), which are provided in different variants, is provided for fastening the fall protection system to a roof substructure made of wood, and one of the at least two base plates (11) which are provided in different variants and can be attached to the support tube (10) is provided for fastening the fall protection to a roof substructure made of concrete, which differs with respect to the dimensions and/or the material thickness and/or the hole pattern from the base plate (11) for fastening the fall protection to a roof substructure made of wood.
7. Modular system according to any one of claims 1 to 5, characterized in that one of the at least two base plates (11) provided in different variants is provided for fastening the fall protection to a roof substructure made of wood or concrete, and one of the at least two base plates (11) which are provided in different variants and can be attached to the support tube (10) is provided for fastening the fall protection to a roof substructure made of steel which differs in the dimensions and/or the material thickness and/or the hole pattern from the base plate (11) for fastening the fall protection to a roof substructure made of wood or concrete.
8. Modular system according to any one of claims 1 to 5, characterized in that one of the at least two base plates (11) provided in different variants is provided for fastening the fall protection to a roof substructure made of wood or concrete or steel and at least one of the two base plates (11) which is provided in different variants and can be attached to the support tube (10) is provided for fastening the fall protection to a roof substructure made of trapezoidal sheet metal, which differs in the dimensions and/or the material thickness and/or the hole pattern from the base plate (11) for fastening the fall protection to a roof substructure made of wood or concrete or steel.
9. Modular system according to any one or more of claims 1 to 5, characterized in that the at least two base plates (11) provided in different variants are different base plates (11) for fastening the fall protection to a roof substructure made of wood comprising wooden plates with different material thickness.

Images