DK2730717T3

DK2730717T3 - Mobile work platform

Info

Publication number: DK2730717T3
Application number: DK13192656.0T
Authority: DK
Inventors: Sven Schuchardt; Armin Schuchardt
Original assignee: Schuchardt Gmbh Kreatives Dachdesign
Priority date: 2012-11-13
Filing date: 2013-11-13
Publication date: 2016-07-18
Also published as: ES2573311T3; PL2730717T3; EP2730717A1; DE202012010799U1; EP2730717B1; EP2730717B9

Description

Technical field

The invention relates to a mobile working platform and to a system comprising a first working platform, a second working platform and an adapter module.

Technical background

Many large industrial facilities may still have roof coverings comprising corrugated asbestos-cement panels. Furthermore, these roof coverings may already be 30 years old or over, and as a result may be porous and brittle. Furthermore, industrial facilities may also have high power and heating costs owing to the old roof coverings. For these reasons, there are currently many industrial facilities having roof coverings that are in need of renovation.

When renovating roof coverings of industrial facilities, the existing waterproof sealing using corrugated asbestos-cement panels can usually first be removed and can then be replaced by trapezoidal steel sheets. Furthermore, the new roof covering can be resealed using film waterproofing. In order to adhere to safety regulations, it may be necessary to install fall-protection devices and fall-through protection equipment below the roof covering to be replaced, i.e. inside the facility. These may generally be produced by providing special netting below the roof surface or by producing a special construction formed by scaffolding. However, it may be difficult to install fall-protection equipment and fall-through protection equipment of this type in industrial facilities, since there may often be pipelines and power distribution systems below the covering. Furthermore, it can be time-consuming and expensive to install fall-protection equipment and fall-through protection equipment. GB 2 337 553 A relates to a roofing safety device, which comprises a working surface that is movable along roof girders by means of rollers. The safety device further comprises a solid safety surface that is arranged below the roof supports. JP 2009-249968A relates to a transport device for roof structures. JP 2001-323620A relates to a method for erecting roofs of large buildings. US 4,805,537 relates to a transport device for monorail trackways for roofing work. US 2003/0167732 A1 relates to a device for applying insulating material for roofs of industrial buildings.

Summary of the invention

The problem addressed by the invention can be considered that of providing a device, in particular a mobile working platform, which makes it easier to renovate roof coverings.

This problem is solved by the subject matter of independent claim 1. Developments and embodiments can be found in the dependent claims, the following description and the drawings. A first aspect of the invention relates to a mobile working platform for installing and removing roof coverings on a roof structure. The mobile working platform comprises a support structure. The working platform further comprises at least one load roller which projects downwards beyond an underside of the support structure and at least one guide roller which protrudes downwards beyond the underside of the support structure. Here, the guide roller protrudes downwards beyond a contact surface of the load roller so that it abuts a roof structure. Furthermore, the rotary shaft of the guide roller is inclined in relation to the rotary shaft of the load roller. In addition, the at least one guide roller is arranged so as to be mountable in a roof structure. The arrangement of the at least one guide roller and the at least one load roller makes it possible to move the working platform along a roof structure.

Here, the mobile working platform may denote a working surface that can be installed on a roof structure so that from this working surface, persons can install and remove roof coverings on the roof structure. “Roof coverings” may for example be understood to be roof coverings or roof waterproofing made of corrugated panels, which for example contain asbestos. Furthermore, new roof coverings, which are provided in the form of trapezoidal steel sheets, for example, can also be installed using the working platform. The roof structure may for example comprise one or more joists, on which the roof coverings may be installed. Furthermore, the roof structure may be an inclined roof structure.

The support structure of the mobile working platform may denote a main structure or a frame structure of the working platform which comprises a frame made up of square tubing, for example. A covering which forms a working surface may furthermore be installed on the upper side of said support structure. The load roller and the guide roller may refer to ballbearing-mounted rollers, which may have a rubber coating. For example, the load rollers may be heavy-load rollers. Furthermore, the load roller projects downwards beyond the underside of the support structure, and therefore the load roller may comprise a contact surface which is arranged below the underside of the support structure. The load roller may abut the roof structure by means of this contact surface, for example. The guide roller protrudes further downwards beyond the contact surface of the load roller and is inclined with respect to the load roller, and therefore the mobile working platform can be mounted in a roof structure by means of the guide roller. When the mobile working platform is moved along the roof structure, the working platform can be movable substantially along or in parallel with the contact surface of the load roller. If the roof structure are joists, the working platform can be movable along these joists.

In this way, the mobile working platform can be mounted in a roof structure in a simple manner. Once the working platform is mounted in the roof structure, a roof covering can be removed or installed from the mobile working platform. For example, the working platform comprising the guide rollers can be mounted in an inclined roof structure. Using the working platform, it is possible to remove roof coverings from above without safety nets being required inside the building. By using the mobile working platform, there is thus no need to provide netting for the roof structure or to produce a scaffolding structure, both of which are time-consuming and expensive. Therefore, time and costs can be saved when renovating roof coverings. Furthermore, in the industrial facility to be renovated, production shortfalls can be minimised, since it may only ever be necessary to close off a portion of the roof structure from which the waterproofing or the roof covering is being removed. Furthermore, the mobile working platform can make it possible to work safely, since the workers can move around on a solid floor and do not have to move around on potentially porous roof-covering panels or on the roof structure. Furthermore, the use of the working platform can minimise the amount of dirt that falls down into the inside of the building. This may be of particular importance when renovating roof coverings containing asbestos. In addition, the risk of water damage from rain can also be minimised, since the new waterproofing can be installed directly behind the working platform, immediately after the old roof covering is removed. Furthermore, the platform may be suitable for many common construction methods using corrugated panels for waterproof sealing. In summary, time and costs can be saved using the mobile working platform. Furthermore, the production shortfalls in the facility to be renovated can be minimised, and at the same time the safety of the workers renovating the roof can also be increased.

An exemplary embodiment of the invention relates to a mobile working platform, as shown in Fig. 1 for example, for providing fall protection and for work on inclined roofs, in which no additional protection against persons falling, such as netting under the roof, is required.

Another exemplary embodiment of the invention relates to a working platform in which the steel frame is provided with variable heavy-load rollers in Halfen rails which are mounted on the underside of the platform.

In another exemplary embodiment of the invention, a plurality of safety hooks are installed on the platform and are rigidly connected to the roof support structure in order to prevent the platform slipping from the roof.

According to an exemplary embodiment of the invention, the rotary shaft of the guide roller is inclined in relation to the rotary shaft of the load roller at an angle of between 70° and 110°, preferably between 85° and 95°.

In other words, the rotary shaft of the guide roller and the rotary shaft of the load roller may be arranged substantially perpendicularly to one another. In this way, the mobile working platform can be mounted on roof structures having rectangular joists, for example. In this case, the contact surface of the load roller may abut the upper side of the joist and the guide roller may abut a surface that is perpendicular to the upper face of the joist. In this way, the working platform can be easily and safely mounted in a joist having a substantially rectangular cross section.

According to another exemplary embodiment of the invention, the at least one load roller has a first rotary shaft having a first angle of less than or equal to 5° in relation to the support structure. Furthermore, the at least one guide roller has a second rotary shaft having a second angle of between 85° and 95° in relation to the support structure.

In other words, the rotary shaft of the load roller may be arranged in parallel with a plane defined by the support structure, and the second rotary shaft of the at least one guide roller may be arranged substantially perpendicularly to the plane of the support structure. In this way, the working surface mounted on the support structure can be arranged in parallel with the contact surface of the load roller. As a result, the mobile working platform can be used for renovating roof coverings on roof structures comprising joists having rectangular cross sections.

According to another exemplary embodiment of the invention, the working platform has a first load roller, a second load roller, a third load roller and a fourth load roller. Furthermore, the working platform has a first guide roller and a second guide roller. Here, the first load roller and the second load roller are attached to a first longitudinal side of the support structure and the third load roller and the fourth load roller are attached to a second longitudinal side of the support structure, the rotary shafts of the longitudinal rollers being parallel to one another. Furthermore, the first guide roller and the second guide roller are arranged at the same level with regard to a longitudinal direction of the support structure.

By providing a plurality of load rollers, the working platform can be installed on a roof structure in a stable manner. As a result, the working platform can be prevented from tilting, for example. By arranging the guide rollers at the same level, the working platform can be attached to joists of a roof structure such that the longitudinal sides of the working platform are substantially perpendicular to the joists of the roof structure. In this way, the working platform can be moved in a direction that is perpendicular to the longitudinal sides of the working platform.

According to another exemplary embodiment of the invention, the working platform comprises at least one L-shaped safety bolt, the L-shaped safety bolt being attached to the working platform and protruding downwards beyond the underside of the support structure. Furthermore, the L-shaped safety bolt is pivotable about a shaft which is substantially vertical in relation to the support structure, such that a projection at the end of the L-shaped safety bolt can hook under a construction of a roof structure when said bolt is pivoted.

An L-shaped safety bolt may also be understood to be an L-shaped safety hook. The L-shaped safety bolt for example has a longitudinal shaft which is perpendicular to a plane defined by the support structure. A projection that can be pivoted under a construction of a roof structure can be perpendicular to the longitudinal shaft of the safety bolt. Furthermore, the L-shaped safety bolt may also be movable in the longitudinal direction of the longitudinal shaft. In this way, the L-shaped safety bolt can be pivoted under a construction of a roof structure and can then be brought into contact with the roof structure. In other words, the working platform can be fastened to the roof structure by means of the L-shaped safety bolt. In this way, the working platform can be prevented from tilting, which could occur if a worker falls into a lifeline system in the working platform, for example. Furthermore, the L-shaped safety bolt can prevent the working platform from rolling away while work is being carried out. Generally, in this way the safety of the working platform can be increased.

According to the invention, the support structure is formed as a rectangular frame, the frame having two opposite longitudinal sides which extend in a longitudinal direction of the frame. Furthermore, the frame has two opposite end sides which extend in a transverse direction of the frame. In addition, the at least one load roller is attached to a longitudinal side of the frame and is movable in the longitudinal direction of the frame.

For example, rails may be attached underneath the longitudinal sides of the frame, along which rails the load rollers are movable. These rails may for example be provided in the form of Halfen rails. The load rollers may furthermore also be attached to the longitudinal sides of the frame by means of a plug-in system. In this case, the longitudinal sides of the frame may have regular holes, by means of which the load rollers, which may be fastened to a U-shaped profiled part, can be fastened to the longitudinal sides of the frame by means of a bolt. In addition, the load roller can be arranged such that the rotary shaft of the load roller is substantially parallel to the longitudinal direction of the frame. In this way, the working platform can be movable in its transverse direction along a roof structure.

Since the load roller is movable in the longitudinal direction of the frame, the working platform can be configured for different distances between joists of a roof structure. For this purpose, the distance between load rollers on the longitudinal sides of the frame can be adjusted such that it corresponds to the distance between the joists of the roof structure. In this way, the working platform can be used for different roof structures.

According to the invention, a traverse is attached between the two opposite longitudinal sides of the frame and is movable in the longitudinal direction of the working platform. Furthermore, the at least one guide roller is attached to the traverse such that the at least one guide roller can be brought into contact with a roof structure.

Furthermore, the at least one L-shaped safety bolt can also be attached to the traverse. The traverse can also be understood to be a variable adjusting bar that is built into the steel frame. In this case, the traverse can be slid and secured between the opposite longitudinal sides, for example in a guide rail having a U-shaped profiled part. Alternatively, the traverse may also be fastened in different positions in the support structure, which has regular holes in the longitudinal sides, by means of socket pins. By means of this traverse, the distance of the working platform from another working platform can be adjusted. Furthermore, by means of the bar, the distance of the working platform from the crown of the roof structure or from the eaves of the roof structure can also be adjusted. Furthermore, the guide roller can prevent the working platform from slipping and the L-shaped safety bolt can prevent the working platform from tilting to the side if a worker falls into a lifeline system of the working platform. In this way, the working platform can be configured for use with another working platform. Furthermore, the working platform can also be adapted to various roof structures.

According to another exemplary embodiment of the invention, the working platform further comprises a working surface, a panel and/or a grating being fastened to the support structure to form the working surface.

For example, the panel and/or the grating may be attached to an upper side of the support structure. A water-permeable working surface can be provided by the grating. For example, a steel grating, which may be galvanised, may be installed on the support structure as a base plate, and a textured coated board, which for example may be 9 mm thick, can be attached over the top of the steel grating as a walkway. This textured coated board may both be very weather-resistant and prevent dirt from falling into the interior of the building. However, the working platform can also be equipped with a grating without there being a panel. In other words, attaching a panel to the grating may be optional. In this way, a stable and optionally weather-resistant working surface can be provided on the working platform.

According to another exemplary embodiment of the invention, the at least one load roller and/or the at least one guide roller are hung such that they oscillate orthogonally to the rotary shaft so that the at least one load roller and/or the at least one guide roller can be oriented in relation to a contact surface of the at least one load roller or to a contact surface of the at least one guide roller.

In other words, the load roller and/or the guide roller can be oscillatable about a shaft that is perpendicular to the rotary shaft of the load roller and/or the guide roller. In this way, the angle of the rotary shaft of the load roller and/or the angle of the rotary shaft of the guide roller can be adapted to the shape of the joist of the roof structure. In this way, the load roller and/or the guide roller can be prevented from jamming on the roof structure, for example. Therefore, the load roller and/or the guide roller can be adapted to a changing contour of the joist of the roof structure, as a result of which the range of applications for the working platform can be broadened.

According to another exemplary embodiment of the invention, the angle at which at least one load roller and/or at least one guide roller is deflected in an oscillating manner is restricted to at most 10°, preferably at most 5°.

By limiting the oscillating deflection of the load roller and/or the guide roller, the working platform can be prevented from slipping because of excessive deflection of the load roller and/or the guide roller. In this way, the orientation of the rotary shaft of the load roller and/or the guide roller can be adapted to a contour of the joist of the roof structure and the safety of the working platform can be ensured at the same time.

According to another exemplary embodiment of the invention, the working platform further comprises fastening means for fastening a personal protection means, the personal protection means preferably being in the form of a handrail of the working platform and/or a lifeline system for the purpose of personal safety.

The fastening means may for example be provided in the form of square tubing, which is fastened or welded to the support structure of the working platform. A projection of a handrail may be inserted into this square tubing, for example. These fastening means that are in the form of square steel tubing may be welded to the underside of the support structure, for example. The handrail may be inserted into this square steel tubing and fastened in the square steel tubing by means of a locking screw. In this case, the handrail may consist of aluminium and may optionally be fastened to the working platform. Furthermore, a lifeline system may also be attached to the fastening means. In this case, the fastening means may be designed as a stainless-steel ring that is rigidly connected to the support structure, for example. As a result, the safety of workers on the working platform can be increased.

According to another exemplary embodiment of the invention, the working platform has a displacement device intended for moving the working platform along the roof structure. In this case, the displacement device comprises a lever unit, a stabilisation unit and a fastening unit. The stabilisation unit can be fastened to the working platform. Furthermore, the lever unit is rod-shaped and is connected to the stabilisation unit by means of a joint such that the lever unit can be pivoted relative to the stabilisation unit and such that the lever unit can be moved in the longitudinal direction of the lever unit relative to the stabilisation unit. In addition, a first end of the rod-shaped lever unit is pivotally connected to the fastening unit. Furthermore, the displacement device can be fastened to a roof structure by means of the fastening unit.

In other words, a manual lever mechanism is provided as a drive or displacement device. In this case, the lever unit and the stabilisation unit may be interconnected, it being possible for the lever unit to be used as a lever. For example, the stabilisation unit may comprise a double joint which connects the lever unit to the stabilisation unit. For example, the double joint may be in the form of a pivotable ring. In this case, the double joint may allow pivoting and movement in the longitudinal direction of the lever unit. In other words, the connection between the lever unit and the stabilisation unit may allow movement in two degrees of freedom, i.e. a rotational degree of freedom and a translational degree of freedom.

In order to move the platform, the displacement device may be attached such that the fastening unit is fastened to the roof structure close to the working platform and the lever unit is substantially perpendicular to the working platform. In this case, the joint between the lever unit and the stabilisation unit is above the joist from which the displacement device pushes off. By pushing or pivoting the lever unit downwards, a displacement movement of the lever unit towards the stabilisation unit may take place at the same time, as a result of which pressure is exerted on the fastening unit or the roof structure. Therefore, the displacement device together with the platform can push off from the roof structure. Alternatively, the displacement device may also be attached such that the fastening unit is further away from the platform at the start and the lever unit is arranged substantially in parallel with the working platform. In this case, the working platform may be pulled towards the fastening unit into a vertical position by means of a movement of the lever unit.

Alternatively, it is also possible for the joint of the displacement device to be laterally offset from the joist from which the displacement device pushes off. In this case, the pivoting movement of the lever unit would be similar to a rudder movement. In this case, the joint would allow two rotational movements and one translation movement of the lever unit relative to the stabilisation unit.

The fastening unit may for example comprise a rubber attachment for roof structures made of steel or a toothed steel attachment for roof structures made of wood, for example. In order to move the working platform along the roof structure, the stabilisation unit can first be attached to the working platform. The fastening unit can then be placed on the roof structure. By pushing the lever unit downwards, the working platform can now be moved forwards by the action of the lever.

As a result, the working platform can be moved along the roof structure in a simple manner, and therefore the renovation of roof coverings can generally be simplified and sped up.

Another aspect of the invention relates to a system which comprises a first working platform described within the context of the present invention, a second working platform described within the context of the present invention, and an adapter module. In this case, the adapter module comprises a rectangular frame containing a first frame part and a second frame part, the first frame part having a first end side of the adapter module and the second frame part having a second end side of the adapter module. In this case, the first frame part and the second frame part can be fixed such that they are movable relative to one another. Furthermore, the first end side of the adapter module can be fastened to an end side of the first working platform and the second end side of the adapter module can be fastened to an end side of the second working platform.

In other words, a gap between two working platforms can be closed by means of the adapter module and/or the working platforms can be interconnected by means of the adapter module. Furthermore, the adapter module can even be installed if roof superstructures, such as chimneys, project from the roof. In this case, the adapter module can be removed at the chimney and inserted again later.

In this case, the first frame part may comprise the first end side of the adapter module and two longitudinal sides. Likewise, the second frame part may comprise the second end side of the adapter module and likewise two longitudinal sides. The longitudinal sides of the first frame part can be moved and secured along the longitudinal sides of the second frame part.

In this case, the frame of the adapter module may be made of square tubing. In this way, a plurality of working platforms can be interconnected, as a result of which roofs can be renovated using a plurality of working platforms. Therefore, several workers can work on renovating the roof at the same time, meaning that the roof can be renovated more rapidly.

The embodiments described likewise relate to a working platform and to a system comprising a first working platform, a second working platform and an adapter module, although individual embodiments are described solely in relation to the working platform or to the system. Synergistic effects may result from different combinations of the embodiments, even if these are not described in the following.

Further features, advantages and possible uses of the invention can be found in the following description of the embodiments and the drawings. Here, all the features that are described and/or shown, in isolation and in any combination, form the subject matter of the invention, irrespective of how they are set out in the individual claims or of their dependency references.

Brief description of the figures

Fig. 1 is a plan view of a mobile working platform according to an embodiment of the invention.

Fig. 2 is a side view of a mobile working platform according to an embodiment of the invention.

Fig. 3 is a perspective view of a working platform according to an embodiment of the invention.

Fig. 4 shows an underside of a working platform according to an embodiment of the invention.

Fig. 5 is a perspective view of an underside of a working platform according to an embodiment of the invention.

Fig. 6 shows a cut surface of a working platform according to an embodiment of the invention.

Fig. 7 shows a displacement device according to an embodiment of the invention.

Fig. 8 is a cross section through a longitudinal side of a support structure of a working platform according to an embodiment of the invention.

Fig. 9 shows a load roller according to an embodiment of the invention.

Fig. 10 shows a load roller according to an embodiment of the invention.

Fig. 11 shows a load roller being installed on a longitudinal side of a support structure of a working platform according to an embodiment of the invention.

Fig. 12 shows a working platform comprising a drive device, which platform is installed on a roof structure in accordance with an embodiment of the invention.

Fig. 13 shows a system which comprises a first working platform, a second working platform and an adapter module, according to an embodiment of the invention.

Fig. 14 shows an adapter module according to an embodiment of the invention.

These figures are schematic, are not to scale and potentially do not have the correct aspect ratio.

Detailed description of embodiments

According to an embodiment shown in Fig. 1 and Fig. 2, a working platform 10 is shown which is used to remove corrugated panels (e.g. asbestos cement corrugated panels, or other panels) from roofs. Therefore, using this working platform 10 it is possible to cover roofs from above without using fall-protection equipment inside the building that is provided by safety nets. In addition, in industrial enterprises, work can continue as normal, since the working platform 10 is located between the old and the new waterproofing.

The working platform comprises a steel frame 11 which is covered by a steel grating panel, on which work can then be carried out. As fall-protection equipment, a rope system is used as an attachment point, so as not to impair the mobility of the persons working thereon. Furthermore, the base frame or steel frame 11 is moved on rollers, which are fastened to Halfen rails 29. The working platform 10 can thus be used on different roof structures. In addition, a plurality of safety apparatuses 30 and 31 preventing the platform from slipping or tilting are attached thereto in order to enable persons to work safely thereon.

According to another embodiment, Fig. 1 is a plan view of a mobile working platform 10 and Fig. 2 is a side view of a mobile working platform 10. In these figures, the mobile working platform comprises a support structure 11, which is designed as a rectangular frame. The rectangular frame 11 has two longitudinal sides 14 and 15 and two end sides 16 and 17. Furthermore, the longitudinal sides 14 and 15 are parallel to a longitudinal direction 8 of the working platform 10 and the end sides 17 and 16 are parallel to a transverse direction 7 of the working platform. Load rollers 18,19, 20, 21 and 22 are attached to the longitudinal side 14 such that the rotary shafts of the load rollers 18 to 22 are parallel to the longitudinal side 14. Likewise, load rollers 23 to 27 are attached to the longitudinal side 15, the rotary shafts of which rollers are parallel to the longitudinal side 15. Furthermore, the support structure or the frame 11 forms a working surface 12, which is formed by a textured coated board. Furthermore, the working platform comprises guide rollers, but these are obscured. Owing to the arrangement of the rollers, the working platform 10 can be moved in its transverse direction 7 along a roof structure.

The side view of the working platform 10 shown in Fig. 2 shows that the load rollers 22, 21, 20, 19 and 18 are installed on a Halfen rail 29. Here, the load rollers 18 to 22 are movable along the Halfen rail 29. Furthermore, L-shaped safety bolts 30 and 31 are attached to the support structure and are pivotable along a longitudinal shaft of the L-shaped safety bolt that is perpendicular to the support structure.

Fig. 3 is a perspective view of a mobile working platform 10 according to another embodiment of the invention. This figure shows that the support structure 11, which comprises longitudinal sides 14, 15 and end sides 16 and 17, contains additional fastening means 36 and 38 for the purpose of personal safety. Here, the fastening means 36 are fastened to the underside of the support structure 11 at the longitudinal sides 15 and 14. In addition, the fastening means are in the form of square tubing. In this way, projections 34 of a handrail 23 can be inserted into the fastening means 36. The fastening means 38 are, for example, designed as steel rings which are fastened to the support structure 11. In this case, a lifeline system can be fastened to the fastening means 38 for the purpose of worker safety. The working surface is in the form of a textured coated board, which is fastened to the upper side of the support structure 11.

Fig. 4 and 5 each show an underside of a working platform 10 according to an embodiment of the invention. These figures show that a traverse 40 is positioned between the longitudinal sides 11. The traverse 40 is arranged between two U-shaped profiled parts 46 and 48 in this case. The traverse can be moved and secured within the U-shaped profiled parts. In addition, the traverse 40 also comprises the guide rollers 42 and 44, the rotary shafts of which are substantially perpendicular to the support structure. In addition, the grating 13 can also be seen from the underside of the working platform 10, which grating forms the working surface of the working platform together with a possible textured coated board. Fig. 5 also shows fastening means 36 for receiving the handrail, which are attached to the longitudinal sides of the support structure 11.

Fig. 6 shows a cut surface of a working platform according to an embodiment of the invention, the cut surface being perpendicular to the longitudinal sides 14 and 15 of the working platform 10. This figure shows that the longitudinal sides 14 and 15 of the support structure are made of square steel tubing. Furthermore, a grating 13 is attached between the square steel tubing of the support structure, which grating is made of galvanised steel, for example. Furthermore, a textured coated board 12 is fastened to the upper side of the support structure, which board forms the working surface 12 of the working platform 10. Halfen rails 54, which are parallel to the longitudinal side 14, are attached to the underside of the longitudinal side 14. A load-roller receiving portion 56 can be moved and secured along these Halfen rails 54, a load roller 18 being fastened to the load-roller receiving portion 56. Likewise, a load roller 23 is installed on the longitudinal side 15 by means of the same mechanism. Furthermore, the load rollers may also comprise an oscillating mechanism comprising an oscillating shaft which is orthogonal to the rotary shaft of the relevant load roller. This is not shown in Fig. 6, however.

Furthermore, U-shaped profiled parts 46 and 48 are attached to the inside of the square steel tubing 14 and 15 of the support structure. A traverse 40 is arranged between these U-shaped profiled parts, is movable along the profiled parts 46 and 48 and can also be fixed in certain positions. Furthermore, guide rollers 42 and 44 and L-shaped safety bolts 50 and 52 are attached to the traverse 40. In this case, the L-shaped safety bolt 50 has a longitudinal shaft 51, which is perpendicular to the working surface 12 defined by the support structure, and a projection 53, which is substantially parallel to the working surface 12. The L-shaped safety bolt 50 is pivotable about the longitudinal shaft 51 so that the projection 53 can be pivoted under a construction of the roof structure. In this way, the L-shaped safety bolt 50 can be hooked under a construction of the roof structure. The same also applies to the L-shaped safety bolt 52. In addition, Fig. 6 shows that the guide rollers 42 and 44 project under a contact surface of the load rollers 18 and 23. In this way, the guide rollers 42 and 44 may be mounted in a joist of a roof structure, for example. Furthermore, the guide rollers 42 and 44 may also comprise an oscillating mechanism; however, this is not shown in Fig. 6.

Fig. 7 shows a displacement device 60 according to an embodiment of the invention. The displacement device comprises a lever unit 62 and a stabilisation unit 64. The lever unit 62 is pivotally connected to a fastening unit 66. In this case, the fastening unit 66 may have a rubber surface for moving working platforms on steel structures or a toothed steel panel for moving said platforms on wooden structures. Furthermore, the stabilisation unit comprises U-shaped profiled parts, by means of which the stabilisation unit can be attached to a working platform 10. The lever unit 62 can be pivoted by means of the handle 70 attached to one end of the lever unit 62. By means of the pivoting, the lever unit 62 is simultaneously moved relative to the stabilisation unit 63, as a result of which the working platform 10 can push off from a roof structure by means of the leverage.

Fig. 8 is a cross section through a longitudinal side 14 of a support structure of the mobile working platform according to an embodiment of the invention. This figure shows that the support structure is made up of square steel tubing. Furthermore, Halfen rails 54 and 55 which are parallel to the longitudinal side 14 of the support structure are arranged on the underside of the square steel tubing of the longitudinal side 14. In addition, a fastening means 38 in the form of a steel ring that is rigidly connected to the support structure is attached to an outer side of the support structure. A lifeline system 39 is in turn attached to the steel ring 38.

Fig. 9 shows a load roller 18 according to an embodiment of the invention, which for example can be moved and secured in Halfen rails which are shown in Fig. 8. Here, connecting screws 58 and 59, which can each be inserted into the Halfen rails 54 and 55 shown in Fig. 8, are attached to the roller receiving portion 56. A vertical wall or a vertically protruding flange, to which the rotary shaft of the load roller 18 is fastened, is also arranged on the roller receiving portion 56. By means of the connecting screws 58 and 59, the load roller can be moved and fastened in the longitudinal direction of the longitudinal side 14 within the Halfen rails shown in Fig. 8.

Fig. 10 shows a load roller having an alternative roller receiving portion. Here, the roller receiving portion 56 comprises a U-shaped profiled part 72, in each of the opposite side walls of which a hole 74 and 76 is made.

Fig. 11 shows how the roller receiving portion shown in Fig. 10 can be fastened to a longitudinal side 14 of a support structure. In this case, holes 75 and 77 are made in the longitudinal side 14 of the support structure. The U-shaped profiled part 72 of the roller receiving portion 56 can now be moved over the square tubing of the longitudinal side 14 of the support structure, and then a bolt 78 can be guided through the holes 74, 76 in the U-shaped profiled part and through the holes 75, 77 in the longitudinal side 14 of the support structure. In this way, the load roller 18 can be positioned and fastened in a certain position along the longitudinal side 14.

Fig. 12 shows a mobile working platform, which is installed on a roof structure, according to an embodiment of the invention. In this figure, the roof structure contains transverse joists 80, 82 and 84. The load rollers of the working platform 10 may be moved in the longitudinal direction of the working platform such that the load roller 23 abuts the joist 80, the load roller 24 abuts the joist 82 and the load roller 25 abuts the joist 84. Furthermore, guide rollers, which are obscured by the working platform, are mounted above the joist 80. In this way, the working platform 10 is prevented from slipping from the roof structure. By means of the rollers, the working platform can be moved in the transverse direction along the joists 80, 82, 84. From the working surface 12, workers can remove old roof coverings 88 on the right-hand side of the working platform 10 and can install new roof coverings 86 on the left-hand side of the working platform 10. In this way, only ever a small region of the roof needs to be uncovered. The displacement device 60 can be used to move the working platform in Fig. 12 further to the right. Here, the displacement device may be a lever mechanism made of aluminium tubing. Said mechanism comprises a lever unit 62, which comprises a fastening unit 66 at one end. In this case, the lever unit is pivotally attached to the fastening unit 66 such that the lever unit 62 can be pivoted in a vertical direction. The stabilisation unit 64 contains two arms, which are fastened to a pivotable ring or pivotable tubing, by means of which the lever unit 62 is guided. In this way, the lever unit 62 is pivotable and movable relative to the stabilisation unit 64. U-shaped profiled parts 68 are arranged at the ends of the arms of the stabilisation unit 64, by means of which parts the stabilisation unit 64 can be attached to the working platform 10. By pushing on the lever unit 62, pressure can now be exerted on the fastening means 66. In this way, the working platform 10 can push off from the roof structure and can thus be moved further to the right in Fig. 12. In order to install the working platform 10 on the roof structure, the load rollers installed on the underside can first be adjusted to the distances between the joists of the roof structure, if necessary. Furthermore, the guide rollers of the working platform can be adjusted to the roof structure such that the working platform is flush with the crown of the roof. Furthermore, if a plurality of working platforms are being used, the guide rollers can be adjusted such that the distance between the separate working platforms is not greater than a predetermined maximum dimension, for example 5 cm. Furthermore, before the working platform is installed on the roof structure, an optional handrail may also be fastened to the working platform 10.

In order to install the working platform on the roof structure, corrugated panels are first removed from the roof covering if necessary. The working platform 10 can then be lifted onto the previously exposed point on the roof and can be placed on the roof structure, for example by means of a crane. Once the entirety of the working platform is in contact with the roof structure, it can be detached from a hook of the crane cable, for example. The L-shaped safety bolts can then be pivoted under a construction of the roof structure and tightened. In this way, the working platform 10 is protected against tilting and is now ready to use.

Workers can then be connected to personal safety equipment comprising a lifeline system fastened to the working platform 10.

Fig. 13 shows a system according to an embodiment of the invention. In this figure, the system comprises a first working platform 10 and a second working platform 9, which are interconnected by means of an adapter module 90. In this case, an end side of the adapter module 90 is connected to an end side of the first working platform 10. Bolts are inserted through holes 96 in order to fasten the adapter module 90 to the first platform 10. Likewise, an end side of the adapter module is connected to an end side of the second working platform 9. Holes 97 are likewise provided for this purpose, through which a bolt can be guided in order to fasten the adapter module 90 to the second working platform 9.

Fig. 14 shows an adaptor module 90 according to an embodiment of the invention. In this figure, the adapter module is made up of a rectangular frame which contains a first frame part 92 and a second frame part 94. In this case, the first frame part 92 comprises a first end side of the adapter module 90 and the second frame part 94 comprises a second end side of the adapter module 90. Furthermore, the two longitudinal sides of the second frame part 94 are movable within the longitudinal sides of the first frame part and can be secured by means of a bolt 93, which can be guided through holes 95 in the frame parts. Furthermore, the end sides of the adapter module comprise holes 96 and 97, by means of which the adapter module can be connected to adjacent working platforms.

In addition, it is noted that “including” or “comprising” does not exclude other elements and “a”, “an” or “one” does not exclude a plurality. It is also noted that features described with reference to one of the above embodiments can also be used in combination with other features of other above-described embodiments. The reference numerals in the claims are not considered to be limiting.

List of reference numerals 7 transverse direction 8 longitudinal direction 9 working platform 10 working platform 11 support structure, frame 12 working surface 13 grating 14 longitudinal side 15 longitudinal side 16 end side 17 end side 18, 19, 20, 21,22, 23, 24, 25, 26, 27 load rollers 29 rail 30, 31 shaft-shaped safety bolt 32 handrail 34 projection 36 fastening means for personal protection 38 fastening means for personal protection 39 lifeline system 40 traverse 42 guide roller 44 guide roller 46 U-shaped profiled part 48 U-shaped profiled part 50, 52 L-shaped safety bolt 51 longitudinal shaft 53 projection 54, 55 Halfen rail 56 roller receiving portion 58, 59 connecting screw 60 displacement device 62 lever unit 64 stabilisation unit 66 fastening unit 68 U-shaped profiled part 70 handle 72 U-shaped profiled part, roller receiving portion 74.76 hole 75.77 hole 78 screw 80, 82, 84 roof structure, joist 86 new roof covering 88 old roof covering 90 adapter module 92 first frame part 93 screw connection 94 second frame part 95, 96, 97 hole

Claims

A mobile working platform (10) for mounting and removing roof covers on a roof structure, the working platform comprising: a support structure (11); at least one cargo roller (18, 19, 20, 21,22, 23, 24, 25, 26, 27) projecting downwardly over an underside of the carrier structure; at least one guide roller (42, 44) projecting downwardly beyond the underside of the support structure; wherein the guide roller projects downwardly over a contact surface of the load roller in such a way that it rests on a roof structure; wherein the axis of rotation of the guide roller is inclined toward the axis of rotation of the load roller; wherein the at least one guide roller is arranged in such a way that it can be suspended in a roof structure; and wherein the working platform may be displaced along a roof structure by virtue of the arrangement of the at least one guide roller and the at least one load roller; wherein the support structure is configured as a rectangular frame (11); wherein the frame has two opposite longitudinal sides (14, 15) extending along a longitudinal direction (8) of the frame; wherein the frame has two opposite front sides (16, 17) extending along a transverse direction (7) of the frame; wherein the at least one load roller is disposed on one of the longitudinal sides of the frame and can be adjusted along the longitudinal direction of the frame; characterized in that a transverse rod (40) is arranged between the two opposite longitudinal sides (14, 15) of the frame which can be adjusted along the longitudinal direction (8) of the working platform; and wherein the at least one guide roller (42, 44) is arranged on the transverse bar (40) so that the at least one guide roller can be brought into contact with a roof structure.

The working platform (10) of claim 1, wherein the axis of rotation of the guide roller has an angle of inclination to the axis of rotation of the load roller which is between 70 ° and 110 °, preferably between 85 ° and 95 °.

The working platform (10) of claim 1 or 2, wherein the at least one load roller (18, 19, 20, 21, 22, 23, 24, 25, 26, 27) has a first axis of rotation which, relative to the support structure, has a first angle less than or equal to 5 °; and wherein the at least one guide roller (42, 44) has a second axis of rotation which, relative to the support structure, has a different angle between 85 ° and 95 °.

Work platform (10) according to one of the preceding claims, wherein the work platform comprises a first load roller (18), a second load roller, a third load roller (23) and a fourth load roller; wherein the working platform comprises a first guide roller (42) and a second guide roller (44); wherein the first load roller (18) and the second load roller are arranged at a first longitudinal side (14) of the support structure; wherein the third load roller (23) and the fourth load roller are arranged at a second longitudinal side (15) of the carrier structure; wherein the axis of rotation of the longitudinal rollers is parallel to each other; and wherein the first guide roller (42) and the second guide roller (44) are disposed at the same height relative to a longitudinal direction of the support structure.

Work platform (10) according to one of the preceding claims, further comprising: at least one L-shaped safety bolt (50, 52); wherein the L-shaped safety bolt is disposed at the work platform and protrudes downwards from the underside of the support structure; and wherein the L-shaped safety bolt can be pivoted about an axis (51) disposed substantially vertically relative to the support structure, so that a collar (53) can be secured at the end of the L-shaped safety bolt by turning under a structure of a roof structure.

Work platform (10) according to one of the preceding claims, further comprising: a work surface; wherein a plate (12) and / or a grating (13) is affixed to the support structure to form the working surface.

The working platform (10) according to one of the preceding claims, wherein the at least one load roller (18) and / or the at least one guide roller (42) is suspended oscillating orthogonally with respect to the axis of rotation, so that the at least one load roller (18) and / or the at least one guide roller (42) may be oriented relative to a contact surface of the at least one load roller or a contact surface of the at least one guide roller.

The working platform (10) of claim 7, wherein a swinging deflection of at least one load roller and / or at least one guide roller is limited to an angle of maximum 10 °, preferably maximum 5 °.

Work platform (10) according to one of the preceding claims, further comprising: fasteners (36, 38) for securing a personal protection; wherein the personal protection is preferably provided in the form of a handrail (32) of the work platform and / or a line protection system (39) for the protection of persons.

Work platform (10) according to one of the preceding claims, wherein the work platform comprises a displacement device (60) for displacing the working platform along a roof structure, which displacement device comprises: an arm unit (62); a stabilizer (64); and a fastener (66); where the stabilizer can be attached to the work platform; wherein the arm unit is formed rod-shaped and is connected to the stabilizer unit with a link in such a way that the arm unit can be rotated relative to the stabilizer unit and the arm unit can be displaced relative to the stabilizer unit in the longitudinal direction of the arm unit; wherein a first end of the rod-shaped arm assembly is pivotally connected to the attachment assembly; and wherein the shear device can be attached to a roof structure by the fastener.

A system comprising: a first working platform (10) according to one of claims 1 to 10; and a second working platform (9) according to one of claims 1 to 10; an adapter module (90) comprising: a rectangular frame comprising a first frame member (92) and a second frame member (94); wherein the first frame member (92) has a first front side of the adapter module (90) and the second frame member (94) has a second front side of the adapter module (90); wherein the first frame member (92) and the second frame member (94) can be adjustably fixed relative to each other; wherein the first front side of the adapter module can be attached to a front side of the first work platform and the second front side of the adapter module can be attached to a front side of the second work platform.