DE10308853B3 - Crash prevention device for structures with flat roofs comprises a rail and a bracket both having horizontally and/or diagonally running rod elements connected by vertical handles - Google Patents

Abstract

Crash prevention device comprises a rail (15) and a bracket (19.1) both having horizontally and/or diagonally running rod elements connected by vertical handles (11.1, 11.2) which have anchor plates (42) with recesses corresponding to a locking system in the longitudinal direction. The rod elements have a connecting head for connecting to one of the anchor plates. The connecting head has a receiving groove for placing the connecting head on the anchor plate and a vertical wedge groove into which a wedge is detachedly clamped. Preferred Features: The rod elements are standard structural elements.

Description

The invention relates to a mobile Fall arrest device for Construction sites on flat roofs, the at least one guardrail serving as fall protection and has at least two cantilevers which are spaced apart from each other transversely to the railing with this fixed, but removable again are connected so that between the railing and one side To prevent falls from falling Work area secured on several sides on the flat roof is formed, and which are spaced from each other by at least four arranged wheels is carried on which the fall arrest device on the Flat roof is movable.

Safety regulations must be followed for construction work on flat roofs be respected. Which also includes it also that a fall protection device on the flat roof edge is to be attached, that is, a device that prevents the falling of people staying on the flat roof and working there definitely prevented.

For this purpose, the DE 200 18 960 U1 a fall protection device has become known which comprises railing rods connected between vertical railing posts. The free ends of the latter can be provided with receiving heads, each of which has a receiving slot which is open to the front and which can be pushed on via a rosette with recesses fastened to the vertical railing post and which has a vertical wedge slot for driving in a clamping wedge. This fall protection device has a bearing arm connected to the vertical post, which is intended to be placed on the surface of the flat roof, the bearing arm being connected to the vertical post via a joint such that the bearing arm is upward when the fall protection device is installed can be pivoted away so that roofing work can also be carried out in the immediate area of the bearing arm or below.

Although this construction diverse in practice proven has to for safety reasons All sides of the flat roof should be continuous before starting work on the flat roof with such a fall protection device be provided. This is complex.

The flat roof works in the work area between two adjacent bearing arms and the railing struts executed easily and safely must, however the bearing arms can be swiveled up to include roof work perform in this area to be able to. This is also complex.

A construction which has been improved in this regard has become known in the form of a mobile flat roof side protection fall protection device from the company publication "The Baumann ^® flat roof side protection" mobile "" from Baumann GmbH, D-88471 Laupheim.

This mobile flat roof side protection fall protection consists of a lattice girder that serves as fall protection the spaced apart from each other two elongated trolleys with the help are releasably attached by double pipe couplings. each Chassis includes a horizontal, elongated beam profile on the two wheel bearings in the longitudinal direction of the carrier profile spaced apart rigidly fixed at predetermined attachment points are. Each wheel bearing is rigid with a horizontal axis of rotation connected, parallel to the longitudinal axis of the carrier profile is arranged and on which a wheel is rotatably mounted.

At one of the ends of the support profile is a vertical post welded to the top of its free End and at its lower free end each a special, firm has pipe coupling connected to the post, the upper Pipe coupling fixed, but detachable again with the top chord of the lattice girder and the lower pipe coupling fixed, but detachable again with a horizontal one Connection strut is connected.

The top chord of the lattice girder is in the area of the vertical posts of the trolleys with one of the double pipe couplings a horizontal connecting strut arranged transversely to the upper chord connected. This is again over Double pipe couplings and over a vertical strut with the support profile connected. The vertical strut is connected via a Stop coupling with a threaded pin extending away from the coupling, through a horizontal through hole in the support profile inserted through and secured there with a nut.

This construction is complex and requires a large number of special components. The width of the Working area between the side trolleys and the lattice girder is limited to 4.5 m and Also the depth of the work area is due to its distance vertical posts fixed to each other. The used as a fastener between the individual components Pipe couplings need tightened with a suitable wrench for assembly and disassembly purposes or solved again become what to comparatively long assembly and disassembly times leads. The stability the constructions constructed with such pipe couplings improvable.

Accordingly, it is an object of the invention to provide a mobile fall protection device for construction sites on flat roofs, the dimensions and / or structural design of which can be easily and flexibly adapted to different structural and / or user needs and which are simple and inexpensive to manufacture and can be safely assembled or disassembled and handled.

This object is achieved by the Features of claim 1, in particular solved in that both the railing as well as the cantilever horizontal and / or diagonal bar elements include that about vertical stems are connected together in their longitudinal direction Rosettes encircling at a distance corresponding to a grid system with recesses, the rod elements preferably at their free ends a connection head for connection on one of the rosettes, the one open to the front Mounting slot for attaching the connection head to the rosettes and has a vertical wedge slot in which a wedge can be releasably clamped can be driven in if the connection head with its receiving slot is attached to the rosette and if the wedge slot and one Recess of the rosette have been made to coincide.

According to an advantageous variant it can be provided that the rosette is preferably essentially flat perforated disc is designed, the recesses of which are through holes, where the connection head vertically overlying wedge openings has, in which the wedge releasably clamped can be driven in if the connection head with its receiving slot is attached to the perforated disc and if the wedge openings and a through hole of the through holes of the then arranged therebetween Perforated disc have been brought to congruence, so that the wedge after its impact through the wedge openings and through the through hole the perforated disc engages.

It is particularly beneficial if the bar elements of the railing and the beam elements of the jibs each standardized scaffolding components are. Such scaffolding components are in a big one Variety of variants available, economical producible and enable favorable Assembly and disassembly conditions.

It is also advantageous if the Booms are designed with at least two vertical stems each have a free stem end facing the flat roof, that directly or indirectly, for example via a vertical starting piece solvable plugged together with a suitably designed thru axle of a chassis is on each of the wheels is stored. This is a stable space structure at low cost support conditions in the area of the wheels allows and the one with the wheels provided undercarriages can be easily and quickly assembled or disassemble again.

It is particularly advantageous if the wheels, which can be rotated around horizontal axes of rotation, each on a chassis are stored, which together with the at least one wheel by one vertical axis of rotation is preferably freely rotatable. This allows the Fall protection device in a simple manner and without it lifting or translating the same into the desired positions be moved on the flat roof.

It is also advantageous if that Chassis can optionally be locked in a first rotational position, in the fall protection device towards its central railing, preferably lengthways the edge of the flat roof is movable and in a second rotational position can be locked; in which the fall protection device in one Direction across their railing, So preferably towards the edge of the flat roof or from the edge of the Flat roofs can be moved away. Through these locking options it can be ensured that the fall protection device, is kept stable in the respectively set running direction of the wheels, while the Fall protection device in a direction perpendicular to the direction of travel of the wheels is secured against moving.

It is useful if the first rotational position of the chassis relative to the second rotational position the chassis is offset by a rotation angle of 90 degrees.

According to a particularly advantageous one variant it can be provided that at least two of the wheels in each case essentially parallel, horizontal, rigidly interconnected Axes of rotation are rotatably mounted on a common chassis, whereby at least two of the wheels of this undercarriage one behind the other in the running direction and preferably arranged in a common vertical plane are. This allows Unevenness in the floor can be bridged safely, without causing the fall arrest device to become stuck comes in the area of these bumps.

It is particularly advantageous if the axes of rotation of the wheels are arranged at a distance which is greater than the distance from two adjacent and one trapezoidal cross-section having depressions of the flat roof, in particular of the Flat roof surface forming longitudinal edges a trapezoidal sheet.

The above measures can be carried out within the scope of the feasibility combine the invention as desired. Other advantages, features and Aspects of invention can the following description can be found in the preferred embodiments the invention is described with reference to the figures.

Show it:

1 a front view of the fall arrest device;

2 a top view of the mobile fall protection device according to 1 ;

3 a left side view of the Fall protection device according to 2 ;

4 a side view from the left of an alternative embodiment variant of a mobile fall protection device with a shorter boom and with an arrangement of the railing with connecting parts adapted to a higher parapet height;

5 an enlarged side view of the two-wheel undercarriage, which is rotatably, but can be locked in certain positions, inserted into a vertical starting piece, into which, in turn, a vertical arm of the boom of the fall protection device can be inserted;

6 a partial representation of a connection node, wherein a connection head and the area surrounding it are shown, partly in a vertical section and partly in a side view;

7 a partial representation of a connection head with a perforated disk attached to a handle, only one connection head with an adjacent Ge scaffolding area and parts of the perforated disk are shown, partly in a sectional view and partly in a plan view.

The mobile fall protection device resulting from the figures 10 includes a railing that serves as fall protection 15 and two outriggers 19.1 and 19.2 , which are spaced from each other transversely to the railing, but are releasably connected to it. The fall protection device 10 is in the embodiment shown of a total of eight wheels 24.1 . 24.2 worn, two wheels each 24.1 . 24.2 a chassis also called a wheel set 57 are assigned, with each of the two arms 19.1 and 19.2 two trolleys each 57 are attached spaced apart.

Both the railing 15 as well as the outrigger 19.1 and 19.2 include horizontal bar elements 44.1 . 44.2 . 44.3 . 44.4 that have vertical stems 11.1 . 11.2 and also starting pieces that act as vertical stems 48 are interconnected. With the horizontal bar elements 44.1 . 44.2 . 44.3 . 44.4 and with the vertical stems 11.1 . 11.2 . 48 both of the railing 15 as well as the boom 19.1 . 19.2 each is a standardized scaffolding element 20 ,

In the exemplary embodiments shown, the two arms are in each case 19.1 . 19.2 the fall protection device 10 designed the same way, so they are formed by the same components. However, it goes without saying that the arms of a fall protection device can also be designed differently.

The railing 15 comprises two vertically spaced railing rod arrangements arranged one above the other, each consisting of two horizontal bars arranged in alignment with one another 18.3 consist. Every horizontal bar 18.3 has a connection head at its two free ends 25 , by means of which the horizontal bar 18.3 on perforated disks 17 with the help of a wedge 26 is detachably clamped, which in turn is attached to vertical stems 11.1 or 11.2 are attached. The longer stems include 11.1 three perforated disks each 17 while the shorter stem 11.2 only two perforated disks 17 has, each at a distance corresponding to the scaffold basic grid measurement system 16 are arranged to each other. This also applies to all supporting vertical rod elements of the fall protection device 10 , therefore also for the stems 11.1 and those plugged together with only one perforated disc each 17 equipped start pieces of the outrigger 19.1 and 19.2 ,

The top horizontal bars 18.3 of the railing 15 and the lower horizontal bars 18.3 of the railing are at one of their ends via a connection head 25 on long stems 11.1 attached while this horizontal bar 18.3 each with its other ends via a connection head 25 on a short stem 11.2 are attached with respect to the same lengths of the horizontal bar 18.3 in the middle between the two outer long stems 11.1 is arranged. The two top horizontal bars 18.3 and the two lower horizontal bars 18.3 of the railing 15 are in the area of the short stem 11.2 with the help of post braces 82 backed up like it from the DE 200 20 794 U1 emerge. For the sake of simplicity, the content of this utility model document is included here in full.

In the exemplary embodiments shown, each boom is 19.1 . 19.2 with two long horizontal bars 18.1 ( 3 ) or 18.2 ( 4 ) and two short horizontal bars each extending at the same height and in the same direction 18.4 educated. Each of these horizontal bars 18.1 . 18.2 and 18.4 have connection heads at their two free ends 25 on that on perforated disks 17 with the help of a wedge 26 are detachably clamped.

The two long horizontal bars 18.1 and 18.2 are arranged parallel to each other and each extend between two long vertical stems 11.1 perpendicular to these. Here are the horizontal bars 18.1 and 18.2 each on the lower two perforated discs 17 of the three perforated disks 17 of the two vertical stems 11.1 attached.

In the in 3 shown embodiment have the horizontal bar 18.1 a length of 257 cm or 207 cm. If, however, as in 4 shown the horizontal bar 18.2 the booms are less than 257 cm in length are on the inner stems for safety reasons 11.1 both arms 19.2 weights 83 coupled, their mass to the selected length of the horizontal bar 18.2 is coordinated.

In the in 3 The exemplary embodiment shown are in each case closer to the railing 15 arranged stems 11.1 each 180 degrees to the horizontal bars 18.1 staggered and on short horizontal bars attached at the same height 18.4 attached, whose longitudinal axis so with the longitudinal axis of the horizontal bar 18.1 flees. As a result, the two short horizontal bars are also 18.4 arranged parallel to each other. Each horizontal bar is at one free end 18.4 via a connection head 25 with a long stem 11.1 connected while each of the horizontal bars 18.4 at its other free end via a connection head 25 with a short vertical stem 11.2 connected is.

On the lower perforated disc 17 of the two perforated disks 17 of the short vertical stem 11.2 is 180 degrees from the bottom horizontal bar 18.4 staggered one with a vertical tube 76 formed rod-shaped locking device 75 via a connection head 25 attached. The length of this vertical tube 76 or the anti-displacement device 75 is at the height of one on the edge 14 of the flat roof 12 longitudinal parapet 13.1 designed in such a way that, when assembled, the vertical tube 76 the parapet 13.1 on their from the flat roof 12 groundbreaking side overlapped down. In this way, a protection against displacement against displacement of the fall protection device 10 in the transverse direction, i.e. parallel to the horizontal bars 18.1 the boom 19.1 causes. This, in 3 Design variant shown, is particularly suitable for parapet heights less than 40 cm above. the surface 81 of the flat roof 12 ,

In contrast, the in 4 shown embodiment variant of a fall protection device 10 especially for parapet heights from 40 cm to 90 cm above the surface 81 of a flat roof 12 suitable and coordinated. For this purpose, the two short horizontal bars are in each case 18.4 on the top two perforated disks 17 of the three perforated disks 17 of the long vertical stem 11.1 the boom 19.2 attached, again the short horizontal bars 18.4 parallel to the long horizontal bars 18.2 are arranged. In the exemplary embodiment shown, the unit is therefore composed of horizontal bars 18.4 and the railing 15 as well as the anti-displacement device 75 compared to the in 3 shown embodiment by a distance 16 between the perforated disks 17 staggered upwards.

It goes without saying that instead of a shift lock 75 other displacement protection measures can also be taken. For example, instead of a short vertical stick 11.2 one by one grid spacing 16 longer vertical stem can be used, which then over two horizontal bars 18.4 with an adjacent vertical stem 11.1 of the boom 19.1 respectively. 19.2 can be connected that its free lower stem end overlaps the outside of the parapet.

Like from the 3 and 4 can be seen, mediates every boom 19.1 and 19.2 Lateral fall protection due to the arrangement of the respective horizontal bars 18.1 and 18.4 respectively. 18.2 and 18.4 , How out 2 the outrigger can be seen 19.1 with their horizontal bars 18.1 and 18.4 at a right angle to the horizontal bars 18.3 of the railing 15 attached. This applies in the same way to the fastening of the horizontal bars 18.2 and 18.4 of the boom 19.2 according to 4 , Between the railing 15 and the two side arms 19.1 respectively. 19.2 is against falling from on the flat roof 12 working area secured on several sides 23 educated. In this way, the fall protection device 10 along the edge 14 in the direction of the double arrow 64 ( 2 ) up to the area of the lateral boundaries of the flat roof 12 be shifted so that it is also at approximately perpendicular to the edge 14 trained side edge of the flat roof 12 Lateral fall protection through the respective railing of the boom 19.1 respectively. 19.2 is mediated.

In 5 is one of the four undercarriages 57 shown in a side view. As can be seen, each chassis is 57 with a wheel set consisting of two wheels 24.1 and 24.1 educated. These wheels 24.1 and 24.2 are each about horizontal axes of rotation 58.1 and 58.2 rotatable with side connecting struts 73.1 and 73.2 connected. These connecting struts 73.1 and 73.2 each extend to the side of the wheels 24.1 and 24.2 in the horizontal direction. The two connecting struts 73.1 and 73.2 are each on parallel legs of a U-profile 74 of the chassis 57 rigidly attached. The legs of this U-profile 74 extend perpendicular to the connecting struts 73.1 and 73.2 upwards, according to the view 4 the wheels 24.1 . 24.2 between the side legs of the U-profile 74 and the base profile of the U-profile 74 are included. On the upper horizontal base profile of the U-profile 74 is a manually operated parking brake 72 attached by means of one of the wheels 24.1 can be determined to shift the chassis 57 in the direction of the wheels 24.1 and 24.2 (Double arrow 64 ; 2 ) to be able to prevent.

On the base profile of the U-profile 74 a vertical tube is fastened in the center of it, onto which an initial piece is attached 48 can be plugged in like this in 5 is shown. This vertical tube of the undercarriage 57 has an outer diameter that is slightly smaller than the inner diameter of the push-on tube of the starting piece 48 so that vertical tube of the landing gear 57 with little play in the beginning 48 is insertable. This is the chassis 57 compared to the starting piece 48 about the vertical axis of rotation 59 basically freely rotatable. However, it is a spring pin 70 provided through a through hole 71 of the start piece in a suitably designed recess in the vertical tube of the chassis 57 can be inserted locking. The vertical tube is at the same height, but 90 degrees apart the other offset four insertion holes for the spring pin 70 provided so that the landing gear 57 with his wheels 24.1 and 24.2 each in corresponding rotary positions 62 ( 2 ) respectively. 63 ( 3 ) can be brought, which are offset by 90 degrees to each other. Two of the four insertion holes are aligned opposite each other and each insertion hole is offset from an adjacent insertion hole by a circumferential angle of 90 degrees. Two of the longitudinal axes of the aligned insertion holes are parallel to the horizontal axes of rotation 58.1 and 58.2 of the wheels 24.1 and 24.2 arranged. In the said rotary positions 62 respectively. 63 can the landing gear 57 with his wheels 24.1 and 24.2 with the help of the spring pin 70 be releasably locked. In the case of the rotary position 62 is the fall protection device 10 towards their railing 15 along the edge 14 of the flat roof 20 in the direction of the double arrow 64 traversable. In the second rotary position 63 is the fall protection device 10 in a direction perpendicular to their railing 15 , i.e. parallel to the horizontal bars 18.1 . 18.2 . 18.4 their outrigger 19.1 . 19.2 to the edge 14 of the flat roof 20 towards or from the edge 14 away from the flat roof in the direction of the double arrow 65 movable ( 2 ).

Like from the 4 and 5 the horizontal axes of rotation can be seen 58.1 and 58.2 the wheels with the same outer diameter 24.1 and 24.2 arranged in a common horizontal plane, the wheels 24.1 and 24.2 via the side connecting struts 73.1 and 73.2 essentially rigid, but about their axes of rotation 58.1 and 58.2 are rotatably arranged. In addition, the wheels 24.1 and 24.2 in their respective direction 64 arranged one behind the other and in a common vertical plane.

As in the embodiment of a flat roof according to 5 has shown this special design and arrangement of the chassis 57 with two wheels here 24.1 and 24.2 special advantages if the surface 81 of the flat roof 20 wells 68 having. In the exemplary embodiment shown, the depressions have 68 a trapezoidal cross section 79 on, the flat roof surface 81 with a trapezoidal sheet 69 is formed. With trapezoidal sheets of this type, the depressions are trapezoidal in cross section 68 of parallel longitudinal boundary edges 67.1 . 67.2 limited. These can be a distance 77 exhibit. If the undercarriage of the fall protection device were only equipped with a single wheel at a time, it would not be possible to avoid moving the fall protection device 10 in the direction of travel 64 increased forces would be required, up to a complete wedging of one of the wheels in one of the recesses 68 , This could also be problematic from a security perspective.

To avoid these problems, as in 5 shown, not just at least two wheels 24.1 and 24.2 one drive each 57 assigned, but the horizontal axes of rotation 58.1 and 58.2 this at least two wheels 24.1 and 24.2 are at a distance 66 arranged, which is greater than the distance 77 of two adjacent depressions 68.1 . 68.2 or from the flat roof surface 81 forming upper longitudinal boundary edges 67.1 and 67.2 of the trapezoidal depressions in cross section 68 this one with a trapezoidal sheet 69 formed flat roof 20 , In this way it is always ensured that at least one of the wheels 24.1 or 24.2 on the top surface 81 of the flat roof 20 rests, while possibly the other of the two wheels in the region of the depressions 68 is held above the same.

As already mentioned above, it is a key feature of the invention that both the railing 15 as well as the outrigger 19.1 respectively. 19.2 horizontal and / or diagonal bar elements 44.1 ., 44.2 . 44.3 . 44.4 include that over vertical stems 11.1 . 11.2 . 48 are connected to one another, the rosettes revolving in their longitudinal direction at a distance corresponding to a grid system 42 have, preferably as perforated disks 17 are designed and preferably as through holes 29 . 29.1 . 29.2 designed recesses 43.1 . 43.2 have, the rod elements 44.1 . 44.2 . 44.3 . 44.4 at least one connection head each 25 for connection to one of the rosettes 42 have a receiving slot open to the front 31 for attaching the connection head 25 on the rosettes 42 and a vertical wedge slot 46 has a wedge 26 can be releasably clamped when the connection head 25 with its slot 31 on the rosette 42 is attached and if the wedge slot 46 and a recess 43.1 . 43.2 the rosette 42 are made to coincide.

Such a connection element design in the form of a so-called connection node is described in more detail below:
The as a perforated disc 17 designed rosettes 42 can with the in 7 shown recesses 43.1 . 43.2 , but also be equipped with differently shaped holes and additional auxiliary devices. In a preferred embodiment, holes of different sizes can be used 29 be formed in a known manner; namely for the scaffolding elements to be connected at right angles to each other 20 , such as B. the horizontal bar 18.1 . 18.2 . 18.3 . 18.4 , preferably the smaller holes 2 ' 9.1 and for the scaffolding elements that may be connected diagonally 20 , such as B. diagonal bars, the larger holes 29.2 , The horizontal bars 18 can also be easily done with a wedge 26 at the larger holes 29.2 be chocked down. If at least two adjacent small holes 29.1 and a large hole immediately in between 29.2 with connection heads 25 by Horizon talriegeln 18 the three horizontal bars are occupied 18 at an angle of 45 degrees to each other. The scaffolding elements 20 can have different lengths depending on their purpose. Here are the scaffolding elements 20 with cylindrical scaffold tubes 21 to which the connection heads 25 are welded, formed. Through appropriate wedge openings. 33.1 and 33.2 are wedges known per se 26 led and beaten. They have a protruding pin or rivet in the lower end area to prevent loss 27 , A side recess 28 is designed to be the wedge 26 in the raised position parallel to the scaffold tube 21 can lay.

Every connection head 25 has a connection area 30 , a perforated disc slot 31 , as well as contact surfaces 32 , by means of which he attached himself to the stem 11 supports when using the perforated disc slot 31 over a perforated disc 17 is stuck in a known manner. It has wedge openings vertically one above the other 33.1 and 33.2 through which the wedge 26 is led. The upper wedge opening 33.1 is in the edge area with an inward protruding bead 34 for the creation of the rivet that protects against loss 27 designed. It is in the rear swivel area 33.3 open in a known manner so that you can use the wedge 26 can pivot backwards when the heads of the rivet 27 on the opposite stop beads 34 support.

Otherwise, the wedge openings 33.1 and 33.2 so wide that the heads of the rivet 27 can be easily carried through. To improve the attachment of the connection head 25 on the perforated disc 17 has the perforated disc slot 31 rounded insertion corners 36 ,

The whole connection head 25 is - according to the plan view 7 seen - wedge-like inwards on the stem and disc center 37 tapered, with the outer boundary surfaces 38.1 and 38.2 are evenly designed in the marginal contours of their outwardly projecting beads. Da.s is made so that others, e.g. B. connect diagonally extending rods and their connection heads can be as close as possible to the outer boundary surfaces of the heads of mutually perpendicular rods.

The outer boundary surfaces 38.1 and 38.2 have recesses between their beads to save weight 39.1 and 39.2 , The rear end surface 40 The massive material areas of the front connection head section are designed as an outward-sloping surface, as is the case with the 6 shows. It is advisable to choose the shape of a partial sphere. These connection surface parts of the end surface designed as partial spherical surfaces 40 rise from partial cylinder surfaces 45 that is about the outside diameter 41 of the pipe 21 to have. The top cylinder face 45 is only in the upper area in the middle of the rear swivel area 33.3 the upper wedge opening 33.1 slightly cut. The upper and the lower partial cylinder surface go in the vertical edge areas, which are directly adjacent to the outer boundary surfaces 38.1 and 38.2 connect in inclined surfaces 47.1 and 47.2 about - like it especially the 7 clearly shows. These sloping faces 47.1 and 47.2 reach about to the bottom of the groove 49 the weld 50 ,

The groove bottom 49 is created by an impact ring surface running through the entire welding area 51 limited. This bump ring surface 51 has an inner boundary as a circle that is about the same size as the inside diameter 53 of the scaffold tube 21 , Your outside diameter 54 is selected so that there is a favorable V-seam welding.

It joins the bump ring surface 51 a conical surface that widens towards the front 55 along with the end surface just cut off 56 of the scaffold tube 21 limits the half V-seam for welding, whereby this conical surface only has a very slight kink in the lateral inclined surfaces 47.1 and 47.2 passes practically continuously. The combination of these design features ensures that, on the one hand, for interchangeability in the modular system, the dimensions of such connection heads that have been customary up to now 25 can adhere to and still achieve better welds.

For centering when attaching the connection head 25 on the scaffold tube 21 are protruding into the scaffold tube 21 matching centering tabs 60 provided, the outer limits of the inner diameter 53 of the scaffold tube 21 corresponds and which, moreover, bevelled into the inner opening 61 pass. They have a width that can be slightly less than an eighth of the circumference. Their size depends on the design options and the acceptable weight, taking into account that they are sufficiently stable during assembly and welding and do not hinder.

Such connection element designs are for example in the EP 0 423 516 B2 and in the EP 0 936 327 A1 described, the content of which is also included here for the sake of simplicity.

The assembly or assembly of a complete fall protection device 10 can be done as follows, preferably at a minimum distance of 2 m from the roof edge: First, the brakes on all four wheel sets 72 tightened. Then you can start 48 on the vertical thru axles of the chassis 57 attached and with the spring pins 70 to be staked out. After that, you can start 48 one vertical handle each 11.1 be plugged in. For an easier assembly of the boom 19.1 respectively. 19.2 it can be recommended to have two trolleys each 57 parallel to each other and then two horizontal bars 18.1 respectively. 18.2 on the also as rosettes 42 be drew perforated disks 17 the stems 11.1 to join. All wedge connections should be struck with a 500 gram hammer to the point of impact.

Subsequently, if an attic 14 is to be bridged, to bridge the parapet, the two shorter horizontal bars 18.4 to one of the vertical stems 11.1 be chocked down, as well as one of the vertical stems 11.2 on the horizontal bars 18.4 be attached. Then there is an assembly situation as in the 3 and 4 shown, but without the respective shift locks 75 would have been attached so far.

After assembling both brackets 19.1 respectively. 19.2 these can be at a distance that is preferably twice the length of the horizontal bar 18.3 for the railing 15 is set up parallel to each other.

Then the two booms 19.1 respectively. 19.2 with a total of four horizontal bars 18.3 get connected. However, it goes without saying that instead of the horizontal bar 18.3 for example, a lattice girder can be mounted, as in the DE 39 04 638 A1 is disclosed and shown.

For the joint of the horizontal bars that act as railing bars 18.3 can then add another stalk 11.2 be installed in the middle. Two flat roof post braces can then be used to stiffen the railing joint 82 be mounted as in the DE 200 20 794 U1 are disclosed.

All the trolleys are then attached to the fully assembled unit 57 rotated 90 degrees so that the fall arrest device 10 by one or two people to the edge 14 of the flat roof 20 can be driven. This person keeps himself or these people within the protective device, ie within the work area 23 on.

After driving up to the edge 14 of the flat roof 20 is at the front end of each boom 19.1 . 19.2 one locking device each 75 mounted and the brakes 72 all four wheel sets are determined. For driving along the fall protection device 10 along the edge 14 of the flat roof 20 the wheelsets can turn 90 degrees around the axis of rotation 59 turned and the brakes 72 be solved again.

In another representation, the invention relates to a mobile fall protection device ( 10 ) for construction sites on flat roofs ( 20 ) that have at least one railing that serves as fall protection ( 15 ) and at least two outriggers ( 19.1 . 19.2 ), which is spaced apart from one another, in each case transversely to the railing ( 15 ) are firmly but releasably connected to it so that between the railing ( 15 ) and the booms ( 19.1 . 19.2 ) a secure work area ( 23 ) is trained. The fall protection device ( 10 ) is of at least four wheels ( 24.1 . 24.2 ) on which they are on the flat roof ( 20 ) is movable. Both the railing ( 15 ) as well as the outrigger ( 19.1 ) include horizontal and / or diagonal bar elements ( 18.1 . 18.3 . 18.4 ) over vertical stems ( 11.1 . 11.2 ) are connected. The stems ( 11.1 . 11.2 ) have surrounding rosettes at a distance corresponding to a grid system ( 42 ) with recesses. The bar elements ( 18.1 . 18.3 . 18.4 ) each have a connection head ( 25 ) for connection to one of the rosettes ( 42 ) on the opening slot that is open to the front and can be attached to the rosettes ( 42 ) and has a vertical wedge slot in which a wedge can be releasably clamped when the connection head ( 25 ) with its slot on the rosette ( 42 ) is attached and if the wedge slot and a recess in the rosette ( 42 ) have been brought to cover.

10

Crash Capture

contraption

11.1

stalk

11.2

stalk

12

flat roof

13.1

Attica

13.2

Attica

14

Edge of 12

15

railing

16

distance

17

perforated disc

18.1

Horizontal bars

18.2

Horizontal bars

18.3

Horizontal bars

18.4

Horizontal bars

19.1

boom

19.2

boom

20

scaffolding element

21

scaffold tube

23

Workspace

24.1

wheel

24.2

wheel

25

connection head

26

wedge

27

rivet

28

recess

29

Through Hole

29.1

Through Hole

29.2

Through Hole

30

connecting area

31

Receiving slit

32

contact surface

33.1

wedge opening

33.2

wedge opening

33.3

rear pan

Area

34

stop bead

25

double arrow

36

Einführecke

37

Stalk- and discs

center

38.1

Outer boundary surface

38.3

Outer boundary surface

39.1

deepening

39.2

deepening

40

end surface

41

outer diameter

of 21

42

rosette

43.1

recess

43.2

recess

44.1

rod element

44.2

rod element

44.3

rod element

44.4

rod element

45

Partial cylinder surface

46

key slot

47.1

wedge surface

47.2

wedge surface

48

initial part

49

groove base

50

Weld

51

Abutting annular surface

52

Thru axle from 57

53

Inner diameter

of 21

54

outer diameter

of 51

55

conical surface

56

End face of 21

57

landing gear

58

Axis of rotation of 24.1 .

24.2

59

Axis of rotation of 57

60

centering tabs

61

inner opening

62

first rotary position

63

second rotary position

64

double arrow

65

double arrow

66

distance

67.1

Longitudinal boundary edge

67.2

Longitudinal boundary edge

68.1

deepening

68.2

deepening

69

trapezoidal sheet

70

cotter pin

71

Through Hole

72

brake

73.1

connecting strut

73.2

connecting strut

74

U-profile

75

shifting prevention

76

pipe

77

distance

79

Trapezoidal cross-section

81

surface

82

Pfostenaussteifung

83

Weight

Claims (9)

Mobile fall protection device ( 10 ) for construction sites on flat roofs ( 20 ) that have at least one railing that serves as fall protection ( 15 ) and at least two outriggers ( 19.1 . 19.2 ), which is spaced apart from one another, in each case transversely to the railing ( 15 ) are firmly but releasably connected to it so that between the railing ( 15 ) and the cantilevers that provide lateral fall protection ( 19.1 . 19.2 ) against falling from on the flat roof ( 20 ) working people multi-sided secured work area ( 23 ) and the at least four spaced-apart wheels ( 24.1 . 24.2 ) on which the fall protection device ( 10 ) on the flat roof ( 20 ) is movable, characterized in that both the railing ( 15 ) as well as the outrigger ( 19.1 . 19.2 ) horizontal and / or diagonal bar elements ( 44.1 . 44.2 . 44.3 . 44.4 ) that have vertical stems ( 11.1 . 11.2 . 48 ) are connected to one another in their longitudinal direction at a distance corresponding to a grid system ( 16 ) surrounding rosettes ( 42 ) with recesses ( 43.1 . 43.2 ), the rod elements ( 44.1 . 44.2 . 44.3 . 44.4 ) one connection head each ( 25 ) for connection to one of the rosettes ( 42 ) which have a receiving slot open towards the front ( 31 ) for attaching the connection head ( 25 ) on the rosettes ( 42 ) and a vertical wedge slot ( 46 ) into which a wedge ( 26 ) can be releasably clamped when the connection head ( 25 ) with its slot ( 31 ) on the rosette ( 42 ) is attached and if the wedge slot ( 46 ) and a recess ( 43.1 . 43.2 ) the rosette ( 42 ) have been brought to cover. Fall protection device according to claim 1, characterized in that the rosette ( 42 ) as a perforated disc ( 17 ) is designed, the recesses ( 43.1 . 43.2 ) Through holes ( 29.1 . 29.2 ), whereby the connection head ( 25 ) vertically superimposed wedge openings ( 33.1 . 33.2 ) into which the wedge ( 26 ) can be releasably clamped when the connection head ( 25 ) with its slot ( 31 ) on the perforated disc ( 17 ) is attached and if the wedge openings ( 33.1 . 33.2 ) and a through hole arranged between them ( 29.1 . 29.2 ) of the through holes ( 29.1 . 29.2 ) the perforated disc ( 17 ) have been brought into line so that the wedge ( 26 ) after it has been driven through the wedge openings ( 33.1 . 33.2 ) and through the through hole ( 29.1 . 29.2 ) the perforated disc ( 17 ) takes effect. Fall protection device according to one of claims 1 or 2, characterized in that the rod elements ( 44.1 . 44.2 . 44.3 . 44.4 ) of the railing ( 15 ) and for the bar elements ( 44.1 . 44.2 . 44.3 . 44.4 ) the boom ( 19.1 . 19.2 ) around standardized scaffolding elements ( 20 ) acts. Fall protection device according to one of claims 1 to 3, characterized in that the boom ( 19.1 . 19.2 ) with at least two vertical stems ( 11.1 . 11.2 ) are designed, each with a to the flat roof ( 20 ) pointing stem end, which can be detached again with a suitably designed thru axle of a chassis ( 57 ) is plugged together, on each of which one of the wheels ( 24.1 . 24.2 ) is stored. Fall protection device according to one of claims 1 to 4, characterized in that the horizontal axes of rotation ( 58.1 . 58.2 ) rotatable wheels ( 24.1 . 24.2 ) each on a chassis ( 57 ) are mounted around a vertical axis of rotation ( 59 ) is rotatable. Fall protection device according to one of claims 4 or 5, characterized in that the chassis ( 57 ) optionally in a first rotary position ( 62 ) can be locked in which the fall protection device ( 10 ) towards their railing ( 15 ) is movable and in a second rotary position ( 63 ) can be locked in which the fall protection device ( 10 ) in a direction transverse to their railing ( 15 ) is movable. Fall protection device according to claim 6, characterized in that the first rotational position ( 62 ) of the chassis ( 57 ) compared to the second rotary position ( 63 ) of the chassis ( 57 ) is offset by an angle of rotation of 90 degrees. Fall protection device according to one of claims 1 to 7, characterized in that in each case at least two of the wheels ( 24.1 . 24.2 ) each around essentially rigid, parallel, horizontal axes of rotation ( 58.1 . 58.2 ) rotatable on a common chassis ( 57 ) are mounted, with at least two of the wheels ( 24.1 . 24.2 ) of this drive ( 57 ) in the running direction ( 64 ) are arranged one behind the other. Fall protection device according to claim 8, characterized in that the axes of rotation ( 58.1 . 58.2 ) the wheels ( 24.1 . 24.2 ) at a distance ( 66 ) are arranged so that at least one of the at least two wheels ( 24.1 . 24.2 ) on an upper surface ( 81 ) each with a trapezoidal cross-section ( 79 ) showing depressions ( 68.1 . 68.2 ) formed flat roof ( 20 ) if the fall protection device ( 10 ) transverse to the upper longitudinal boundary edges ( 67.1 . 67.2 ) of the wells ( 68.1 . 68.2 ) is moved.