EP2730717B9 - Mobile work platform - Google Patents

Description

Technical area

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

Technical background

Many of the large industrial plants may still have roof covers with asbestos cement corrugated sheets. Furthermore, these roof coverings can already have an age of 30 years or more and can thereby become porous and brittle. Furthermore, industrial plants can also have increased energy and heating costs because of the old roof coverings. For these reasons, there are currently many redeveloped roof covers of industrial plants.

When renovating roof covers of industrial plants, the existing seals can usually first be dismantled with asbestos cement corrugated sheets and then replaced with steel trapezoidal sheets. Furthermore, the new roof cover can be sealed again with a film seal. In order to comply with safety regulations, it may be necessary to install fall arresters and fall protection devices below the ones to be replaced Roof cover, so inside the hall to install. This can usually be done by netting below the roof surface with special nets or by the production of a special construction of scaffolding. However, in industrial installations it may be difficult to assemble such fall arresters since under the cover often pipelines and power distributions may pass. Furthermore, the installation of fall arresters and crash protectors can be time consuming and costly.

The GB 2 337 553 A relates to a safety device for roofing, which has a work surface, which is displaceable by means of rollers along roof carriers. The safety device further comprises a fixed safety surface, which is arranged below the roof rack.

The JP 2009-249968A relates to a transport device for roof structures.

The JP 2001-323620A relates to a method for erecting roofs of large buildings.

The US 4,805,537 relates to a transport device for monorail trackways for roof work.

The US 2003/0167732 A1 relates to a device for applying insulation material for roofs of industrial buildings.

Summary of the invention

It can be regarded as an object of the invention to provide a device, in particular a mobile work platform, which simplifies a renovation of roof coverings.

This object is solved by the subject matters of independent claim 1. Further developments and embodiments can be taken from the dependent claims, the following description and the figures.

A first aspect of the invention relates to a mobile work platform for mounting and demounting roof coverings on a roof construction. In this case, the mobile work platform on a support structure. Furthermore, the working platform has at least one load roller projecting downwards beyond an underside of the support structure and at least one guide roller projecting downwards over the underside of the support structure. In this case, the guide roller projects downwards over a bearing surface of the load roller in such a way that it rests on a roof construction. Furthermore, the axis of rotation of the guide roller is inclined to the axis of rotation of the load roller. In addition, the at least one guide roller is arranged to be suspended in a roof construction. By the Arrangement of the at least one guide roller and the at least one load roller, the working platform is displaceable along a roof construction,

Here, the mobile work platform can designate a work surface, which can be installed on a roof structure, so that people can mount and dismantle roof coverings from this work surface on the roof construction. Roof coverings can be understood, for example, as roof coverings or roof seals made of corrugated sheets, which include, for example, asbestos. Furthermore, with the work platform, new roof covers, which are provided for example in the form of steel trapezoidal sheets, are mounted. The roof construction may, for example, comprise one or more beams on which the roof coverings may be installed. Furthermore, the roof structure may be an inclined roof construction.

The support structure of the mobile work platform can designate a basic structure or framework structure of the work platform, which comprises, for example, a frame made of square tubes. On the top of this support structure may further be mounted a cover which forms a work surface. The load roller and the guide roller may refer to ball-bearing rollers, which may have a rubber coating. For example, the load rollers may be heavy duty rollers. Furthermore, the load roller projects beyond the underside of the support structure downwards, so that the load roller can have a support surface which is arranged below the underside of the support structure. With this support surface, the load roller can rest for example on the roof structure. The guide roller also protrudes downwards over the support surface of the load rollers and is inclined relative to the load roller, so that the mobile work platform with the guide roller can be suspended in a roof construction. When moving the mobile work platform along the roof construction, the work platform can be substantially along or parallel to the support surface the load roller be displaced. In case the roof construction is a beam, the working platform can be displaceable along these beams.

In this way, the mobile work platform can be hung in a simple way in a roof construction. After attaching the work platform in the roof construction, a roof cover can be dismantled or mounted from the mobile work platform. For example, the work platform can be hung with the guide rollers in an inclined roof construction. The work platform makes it possible to disassemble roof covers from above without the need for safety nets inside. By using the mobile work platform can therefore be dispensed with a time-consuming or costly wetting of the roof construction or on the production of a construction of scaffolding. Therefore, time and cost can be saved in the renovation of roofing. Furthermore, failures of the production can be minimized in the industrial plant to be rehabilitated since only a portion of the roof structure must be blocked if necessary, in which just the seal or the roof covering is dismantled. Furthermore, the mobile work platform can enable safe working, as the workers can move on a solid surface and do not have to move on possibly porous roof panels or on the roof construction. Furthermore, by using the work platform, the falling of dirt into the building interior can be minimized. This can be particularly important in the renovation of roofing with asbestos of great importance. In addition, the risk of water damage due to rain can be minimized, as the new seal can be mounted directly behind the work platform directly after disassembly of the old roof cover. Furthermore, the platform may be suitable for many common designs with corrugated sheet seals. In summary, time and costs can be saved with the mobile work platform. Furthermore, the Production losses in the plant to be rehabilitated can be minimized and at the same time the safety of the workers renovating the roof can be increased.

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

Another exemplary embodiment of the invention relates to a work platform in which the steel frame is provided with variable heavy duty castors in Halfen rails mounted on the underside of the platform.

In another exemplary embodiment of the invention, a plurality of safety hooks are mounted to the platform, which are fixedly connected to the roof rack construction, to prevent slipping of the platform from the roof.

According to an exemplary embodiment of the invention, the axis of rotation of the guide roller to the axis of rotation of the load roller to an angle of inclination, which is between 70 ° and 110 °, preferably between 85 ° and 95 °.

In other words, the axis of rotation of the guide roller and the axis of rotation of the load roller may be arranged substantially perpendicular to each other. In this way, the mobile work platform can be hung, for example, on roof structures with rectangular beams. The bearing surface of the load roller can rest on the upper side of the beam and the guide roller can rest on a surface perpendicular to the upper surface of the beam surface. In this way, the work platform is easily and safely suspended in a beam with a substantially rectangular cross-section.

According to a further exemplary embodiment of the invention, the at least one load roller on a first axis of rotation, which has a first angle to the support structure, which is less than or equal to 5 °. Further, the at least one guide roller on a second axis of rotation, which has a second angle to the support structure, which is between 85 ° and 95 °.

In other words, the axis of rotation of the load roller may be arranged parallel to a plane defined by the support structure and the second axis of rotation of the at least one guide roller may be arranged substantially perpendicular to the plane of the support structure. In this way, the mounted on the support structure working surface can be arranged parallel to the support surface of the load roller. This allows the mobile work platform to be used for the renovation of roof coverings on roof structures with beams with rectangular cross-sections.

According to another exemplary embodiment of the invention, the work platform has a first load roller, a second load roller, a third load roller and a fourth load roller. Furthermore, the work platform has a first guide roller and a second guide roller. In this case, the first load roller and the second load roller are mounted on a first longitudinal side of the support structure and the third load roller and the fourth load roller are mounted on a second longitudinal side of the support structure, wherein the axes of rotation of the longitudinal rollers are parallel to each other. Further, the first guide roller and the second guide roller are arranged at the same height with respect to a longitudinal direction of the support structure.

By providing several load rollers, the work platform can be stably mounted on a roof structure. As a result, for example, the tilting of the work platform can be prevented. Due to the arrangement of the guide rollers at the same height, the working platform can be so on beams of a Roof construction be attached, that the long sides of the working platform are arranged substantially perpendicular to the beams of the roof construction. In this way, the work platform in a direction which is perpendicular to the longitudinal sides of the work platform, displaced.

In accordance with another exemplary embodiment of the invention, the work platform includes at least one L-shaped safety bolt, the L-shaped safety bolt being attached to the work platform and projecting downwardly beyond the underside of the support structure. Furthermore, the L-shaped safety bolt is pivotable about an axis arranged substantially vertically to the support structure, so that a projection can be hooked in at the end of the L-shaped safety bolt during pivoting under a structure of a roof structure.

Under the L-shaped safety bolt and L-shaped safety hooks can be understood. The L-shaped safety bolt has, for example, a longitudinal axis, which is arranged perpendicular to a plane defined by the support structure. Perpendicular to the longitudinal axis of the safety bolt, a projection can be arranged, which is pivotable under a structure of a roof structure. Further, the L-shaped safety bolt may also be slidable in the longitudinal direction of the longitudinal axis. In this way, the L-shaped safety bolt can be pivoted below a structure of a roof structure and then brought into abutment with the roof structure. In other words, the work platform can be fixed to the roof structure by means of the L-shaped safety bolt. In this way, a tilting of the work platform, which could occur, for example, by the case of a worker in a rope securing system in the work platform can be prevented. Furthermore, the working platform can be prevented from rolling away during operation by the L-shaped safety bolt. in the In general, the safety of the work platform can be increased in this way.

According to the invention, the support structure is designed as a rectangular frame, wherein the frame has two opposite longitudinal sides, which extend along a longitudinal direction of the frame. Furthermore, the frame has two opposite end faces, which run along a transverse direction of the frame. In addition, the at least one load roller is mounted on a longitudinal side of the frame and is adjustable along the longitudinal direction of the frame.

For example, rails may be mounted under the longitudinal sides of the frame, along which the load rollers are displaceable. These rails may for example be provided in the form of Halfen rails. The load rollers may also be mounted with a plug-in system on the longitudinal sides of the frame. The longitudinal sides of the frame may have regular holes through which the load rollers, which may be attached to a U-profile, can be fastened with a bolt on the longitudinal sides of the frame. In addition, the load roller may be arranged such that the axis of rotation of the load roller is substantially parallel to the longitudinal direction of the frame. The work platform can be displaced in this way in its transverse direction along a roof construction.

Since the load roller is adjustable in the longitudinal direction of the frame, the working platform can be configured for different distances between beams of a roof construction. For this purpose, the distance of load rollers on the longitudinal sides of the frame can be adjusted so that it coincides with the distance of the beams of the roof construction. In this way, the work platform for various roof structures can be used.

According to the invention, a cross bar is mounted between the two opposite longitudinal sides of the frame, which is adjustable along the longitudinal direction of the working platform. Furthermore, the at least one guide roller is attached to the crossbar, so that the at least one guide roller can be brought into abutment with a roof construction.

Furthermore, the at least one L-shaped safety bolt can also be attached to the crossbar. Under the cross bar can also be understood a variable adjusting bolt, which is installed within the steel frame. In this case, the crossbar can be moved and fixed between the opposite longitudinal sides, for example in a guide rail with a U-profile. Alternatively, the crossbar can also be fastened at different positions with locking pins in the support structure, which has regular bores in the longitudinal sides. With this crossbar, the distance of the working platform can be adjusted to another working platform. Furthermore, with the bolt and the distance of the working platform to the ridge of the roof construction or the eaves of the roof construction can be adjusted. Further, the guide roller can prevent slipping of the work platform and the L-shaped safety bolt can prevent the lateral tilting of the work platform, in the event that a worker falls into a safety system of the work platform. In this way, the work platform can be configured for use with another work platform. Furthermore, the working platform can also be adapted to different roof structures.

According to a further exemplary embodiment of the invention, the work platform further comprises a work surface, wherein a plate and / or a grid are fixed on the support structure to form the work surface.

For example, the plate and / or the grid may be mounted on an upper side of the support structure. Through the grate can a water-permeable work surface are provided. For example, on the support structure, a steel mesh, which may be galvanized, be mounted as a base plate and above the steel mesh, a screen printing plate, which may for example have a thickness of 9 mm, be mounted as a catwalk. On the one hand, this screen printing plate can be very weather-resistant and, on the other hand, it can also prevent the falling of dirt into an interior of the building. However, the work platform can also be equipped with a grid and without a plate. In other words, attaching a plate to the grid may be optional. In this way, a stable and possibly weather-resistant work surface can be provided on the work platform.

According to a further exemplary embodiment of the invention, the at least one load roller and / or the at least one guide roller is suspended oscillatingly orthogonal to the axis of rotation, so that the at least one load roller and / or the at least one guide roller with respect to a contact surface of the at least one load roller or a contact surface at least one leadership role are aligned.

In other words, the load roller and / or the guide roller can be oscillated about an axis which is perpendicular to the axis of rotation of the load roller and / or the guide rollers. In this way, the angle of the axis of rotation of the load roller and / or the angle of the axis of rotation of the guide roller can be adapted to the shape of the beam of the roof construction. In this way, for example, tilting of the load roller and / or the guide roller on the roof structure can be prevented. Thus, the load roller and / or the guide roller can be adapted to a changing contour of the beam of the roof construction, whereby the application area of the working platform can expand.

According to a further exemplary embodiment of the invention, a pendulum deflection of at least one load roller and / or at least one guide roller is limited to an angle of a maximum of 10 °, preferably a maximum of 5 °.

By limiting the pendulum deflection of the load roller and / or the guide roller slipping of the working platform can be prevented by excessive deflection of the load roller and / or the guide roller. In this way, at the same time the orientation of the axis of rotation of the load roller and / or the guide roller can be adapted to a contour of the beam of the roof construction and the safety of the working platform can be ensured.

According to a further exemplary embodiment of the invention, the work platform further comprises fastening means for securing a personal protection, wherein the personal protection is preferably carried out in the form of a railing of the working platform and / or a safety rope system for securing persons.

The fastening means can be provided, for example, in the form of square tubes, which are fastened or welded to the support structure of the working platform. In this square tubes, for example, a projection of a railing can be retracted. This executed in the form of square steel tubes fasteners may be welded, for example, to the underside of the support structure. The railing can be inserted into these square steel tubes and fixed with a locking screw in the square steel tubes. The railing can be made of aluminum and can be optionally attached to the work platform. Furthermore, a rope securing system can also be attached to the fastening means. In this case, the fastening means, for example, as a stainless steel ring, which is fixedly connected to the support structure, executed. This can increase worker safety on the work platform.

According to a further exemplary embodiment of the invention, the working platform has a sliding device for moving the working platform along the roof construction. In this case, the displacement device comprises a lever unit, a stabilization unit and a fastening unit. The stabilization unit can be attached to the work platform. Further, the lever unit is rod-shaped and connected to the stabilizing unit with a hinge such that the lever unit to the stabilizing unit is pivotable and that the lever unit relative to the stabilizing unit in the longitudinal direction of the lever unit is displaceable. In addition, a first end of the rod-shaped lever unit is pivotally connected to the fixing unit. Furthermore, the displacement device can be fastened by means of the fastening unit to a roof construction.

In other words, a manual lever mechanism is provided as the drive or displacement device. In this case, the lever unit and the stabilization unit can be connected to each other, wherein the lever unit can be used as a lever. For example, the stabilization unit can have a double joint, which connects the lever unit with the stabilization unit. For example, the double hinge may be provided in the form of a pivotable ring. In this case, the double joint can allow a pivoting and a displacement along the longitudinal direction of the lever unit. In other words, the connection between the lever unit and the stabilization unit can allow movement with two degrees of freedom, i. Rotational freedom and translational freedom.

To move the platform, the displacement device can be mounted such that the fastening unit is attached to the roof structure near the work platform and the lever unit is substantially perpendicular to the work platform. Here is the joint between the lever unit and Stabilization unit above the beam, from which repels the displacement device. By pushing down or pivoting the lever unit, a sliding movement of the lever unit to the stabilizing unit can take place simultaneously, whereby a pressure is exerted on the fastening unit or the roof construction. As a result, the displacement device including the platform can repel the roof construction. Alternatively, the displacement device can also be mounted such that the fastening unit is initially removed from the platform and the lever unit is arranged substantially parallel to the working platform. In this case, the working platform can be pulled by moving the lever unit in a vertical position in the direction of the fastening unit.

Alternatively, it is also possible that the joint of the displacement device laterally offset from the beam from which repels the displacement device, is arranged. In this case, the pivotal movement of the lever unit would resemble a rudder movement. The joint would allow in this case two rotational movements and a translational movement of the lever unit relative to the stabilization unit.

The attachment unit may for example have a rubber attachment for roof structures made of steel or, for example, a steel spike attachment for roof structures made of wood. To move the work platform along the roof structure, first the stabilization unit can be attached to the work platform. Subsequently, the fastening unit can be placed on the roof construction. By pushing down the lever unit, the working platform can now be moved forward by a lever action.

As a result, the work platform can be easily moved along the roof structure, which generally simplifies the renovation of roofing and can be accelerated.

Another aspect of the invention relates to a system having a first work platform described in the context of the present invention, a second work platform described in the context of the present invention, and an adapter module. In this case, the adapter module comprises a rectangular frame, which includes a first frame part and a second frame part, wherein the first frame part has a first end side of the adapter module and wherein the second frame part has a second end face of the adapter module. In this case, the first frame part and the second frame part are mutually adjustable adjustable. Furthermore, the first end side of the adapter module can be fastened to an end face of the first work platform and the second end face of the adapter module can be fastened to an end face of the second work platform.

In other words, a gap between two working platforms can be closed with the adapter module and / or the working platforms can be connected to one another with the adapter module. Furthermore, the adapter module can also be installed if roof structures, for example fireplaces, protrude from the roof. In this case, the adapter module can be removed from the chimney and replaced later.

In this case, the first frame part may have the first end side of the adapter module and two longitudinal sides. Likewise, the second frame part may have the second end face of the adapter module and also two longitudinal sides. The longitudinal sides of the first frame part may be displaceable and lockable along the longitudinal sides of the second frame part. In this case, the frame of the adapter module can be constructed of square tubes. In this way, multiple work platforms can be interconnected, whereby the roof renovation with multiple Work platforms can be done. As a result, several workers can simultaneously renovate the roof, whereby the roof renovation can be done faster.

The described embodiments equally relate to a work platform and a system having a first work platform, a second work platform, and an adapter module, although individual embodiments are described solely in relation to the work platform or system. Synergistic effects may result from various combinations of embodiments, although not described below.

Other features, advantages and applications of the invention will become apparent from the following description of the embodiments and figures. All described and / or illustrated features alone and in any combination form the subject matter of the invention, regardless of their composition in the individual claims or their back references.

Brief description of the figures

• Fig. 1 shows a mobile work platform in a plan view according to an embodiment of the invention.
• Fig. 2 shows a mobile work platform in a side view according to an embodiment of the invention.
• Fig. 3 shows a perspective view of a work platform according to an embodiment of the invention.
• Fig. 4 shows a bottom of a work platform according to an embodiment of the invention.
• Fig. 5 shows a perspective view of an underside of a work platform according to an embodiment of the invention.
• Fig. 6 shows a sectional 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 shows a cross section of a longitudinal side of a support structure of a work 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 the mounting of a load roller 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 with a drive device which is mounted on a roof structure according to an embodiment of the invention.
• Fig. 13 shows a system comprising a first work platform, a second work 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.

The figures are schematic, not to scale and possibly not shown in proportion.

Detailed description of embodiments

According to a in Fig. 1 and Fig. 2 shown embodiment, a working platform 10 is shown, which serves for the dismantling of corrugated sheets (eg Eternit Wellasbest or others) on roofs. Thus, it is possible with this work platform 10 to cover roofs from above, without using an inwardly produced by safety nets fall protection. Additionally, in industrial operations, the workflow may continue normally because the work platform 10 is between the old and new seals.

The work platform has a steel frame 11, which is covered with a steel grid plate, which can then be worked on. As a fall protection we use a cable system as a stop point in order not to impair the mobility of the people working on it. Further, the base frame or steel frame 11 moves on rollers, which are fastened with Halfenschienen 29. Thus, the working platform 10 can be used on various roof structures. In addition, several fuses 30 and 31 are mounted against slipping or tilting of the platform to ensure safe working on this can.

According to a further embodiment are in Fig. 1 a top view of a mobile work platform 10 and in Fig. 2 a side view of a mobile work platform 10 is shown. In this case, the mobile work platform comprises a support structure 11, which is designed as a rectangular frame. In this case, the rectangular frame 11 has two longitudinal sides 14 and 15 and two end faces 16 and 17. Furthermore, the longitudinal sides 14 and 15 are parallel to a longitudinal direction 8 of the work platform 10 and the end faces 17 and 16 are parallel to one Transverse direction 7 of the work platform. On the longitudinal side 14 load rollers 18, 19, 20, 21 and 22 are mounted such that the axis of rotation of the load rollers 18 to 22 are parallel to the longitudinal side 14. Also load rollers 23 to 27 are attached to the longitudinal side 15, whose axes of rotation are parallel to the longitudinal side 15. Further, the support structure or the frame 11 forms a work surface 12, which is formed by a screen printing plate. Furthermore, the work platform on guide rollers, which are hidden. Due to the arrangement of the rollers, the working platform 10 is displaceable along its transverse direction 7 along a roof construction.

In the in Fig. 2 shown side view of the working platform 10 is shown that the load rollers 22, 21, 20, 19 and 18 are mounted on a Halfenschiene 29. The load rollers 18 to 22 along the Halfen rail 29 are adjustable. Further, L-shaped safety bolts 30 and 31 are attached to the support structure, which are pivotable along a longitudinal axis of the L-shaped safety bolt perpendicular to the support structure.

In Fig. 3 is a perspective view of a mobile work platform 10 is shown according to another embodiment of the invention. It is shown that the support structure 11, which includes longitudinal sides 14, 15 and end faces 16 and 17, includes further attachment means 36 and 38 for personal protection. The fastening means 36 are attached to the longitudinal sides 15 and 14 on the underside of the support structure 11. In addition, the fastening means are designed in the form of a square tube. In this way, projections 34 of a railing 23 can be inserted into the fastening means 36. The fastening means 38 are designed, for example, as steel rings, which are fastened to the support structure 11. In this case, a safety device for securing workers can be fastened to the fastening means 38. The work surface is in the form of a screen printing plate, which is attached to the top of the support structure 11.

In the 4 and 5 in each case an underside of a working platform 10 according to an embodiment of the invention is shown. It can be seen that between the longitudinal sides 11, a cross bar 40 is positioned. In this case, the cross bar 40 is disposed between two U-shaped profiles 46 and 48. In this case, the crossbar can be moved and fixed within the U-shaped profiles. In addition, the cross bar 40 also includes the guide rollers 42 and 44, whose axis of rotation are arranged substantially perpendicular to the support structure. In addition, from the bottom of the work platform 10 and the grid 13 can be seen, which forms the working surface of the work platform together with a possible screen printing plate. In Fig. 5 In addition, fastening means 36 are shown for railing receiving, which are attached to the longitudinal sides of the support structure 11.

In Fig. 6 a sectional area of a working platform according to an embodiment of the invention is shown, wherein the sectional area is arranged perpendicular to the longitudinal sides 14 and 15 of the working platform 10. It can be seen that the longitudinal sides 14 and 15 of the support structure are formed from square steel tubes. Furthermore, a grid 13 is mounted between the square steel tubes of the support structure, which is made for example of galvanized steel. Further, a screen printing plate 12 is attached to the top of the support structure, which forms the working surface 12 of the working platform 10. On the underside of the longitudinal side 14 Halfen rails 54 are mounted, which are parallel to the longitudinal side 14. Along these Halfen rails 54 a load roller holder 56 is movable and fixable, wherein on the load roller 56 a load roller 18 is attached. Also, a load roller 23 is mounted on the longitudinal side 15 by means of a same mechanism. Furthermore, the load rollers can also have a pendulum mechanism with a pendulum axis which is orthogonal to the axis of rotation of the respective load roller. This one is in Fig. 6 but not shown.

Further, U-shaped profiles 46 and 48 are attached to the inside of the four-edged steel tubes 14 and 15 of the support structure. Between these U-shaped profiles, a cross bar 40 is arranged, which is displaceable along the profiles 46 and 48 and can also be determined at certain positions. Further, 40 guide rollers 42 and 44 and L-shaped safety bolts 50 and 52 are attached to the cross bar. In this case, the L-shaped safety bolt 50 comprises a longitudinal axis 51 which is perpendicular to the working surface 12 defined by support structure, and a projection 53 which is substantially parallel to the work surface 12. In this case, the L-shaped safety pin 50 is pivotable about the longitudinal axis 51, so that the projection 53 can be pivoted under a structure of the roof structure. In this way, the L-shaped safety bolt 50 can be hooked under a structure of the roof structure. The same applies to the L-shaped safety pin 52. In addition, in Fig. 6 It can be seen that the guide rollers 42 and 44 protrudes under a bearing surface of the load rollers 18 and 23. In this way, the guide rollers 42 and 44 can be hung for example in a beam of a roof construction. Further, the guide rollers 42 and 44 may have a pendulum mechanism which in Fig. 6 but not shown.

In Fig. 7 a displacement device 60 according to an embodiment of the invention is shown. The displacement device comprises a lever unit 62 and a stabilization unit 64. The lever unit 62 is pivotally connected to a fastening unit 66. In this case, the attachment unit 66 may have a rubber surface for moving work platforms on steel structures or a steel serrated plate for moving to wooden structures. Furthermore, the stabilization unit comprises U-profiles with which the stabilization unit can be attached to a work platform 10. By means of the handle 70, which is attached to one end of the lever unit 62, the lever unit 62 can be pivoted. By pivoting at the same time a displacement of the lever unit 62 with respect to the stabilizing unit 63, whereby can be repelled by the leverage of the working platform 10 of a roof construction.

In Fig. 8 is a cross section of a longitudinal side 14 of a support structure of the mobile work platform according to an embodiment of the invention shown. It can be seen that the support structure is formed from square steel tubes. Further, Halfen rails 54 and 55 are arranged on the underside of the square steel tube of the longitudinal side 14, which are parallel to the longitudinal side 14 of the support structure. In addition, on an outer side of the support structure, a fastening means 38 in the form of a steel ring which is fixedly connected to the support structure attached. On the steel ring 38, in turn, a cable securing system 39 is attached.

In Fig. 9 a load roller 18 is shown according to an embodiment of the invention, which, for example, in Halfen rails, which in Fig. 8 are shown, displaced and can be fixed. In this case, 56 connecting screws 58 and 59 are attached to the roller seat, which in each case in the Fig. 8 shown Halfen rails 54 and 55 are retractable. On the roller receptacle 56, a vertical wall or a vertically projecting flange is further arranged, to which the axis of rotation of the load roller 18 is attached. By means of the connecting screws 58 and 59, the load roller within the in Fig. 8 Halfen rails shown in the longitudinal direction of the longitudinal side 14 are moved and fixed.

In Fig. 10 is a load role with an alternative role recording shown. In this case, the roller receptacle 56 comprises a U-shaped profile 72, in whose opposite side walls in each case a bore 74 and 76 is arranged.

In Fig. 11 is shown as the in Fig. 10 shown roller receptacle on a longitudinal side 14 of a support structure can be attached. There are in the Longitudinal side 14 of the support structure bores 75 and 77 arranged. The U-profile 72 of the roller holder 56 can now be moved over the square tube of the longitudinal side 14 of the support structure and then a bolt 78 through the holes 74, 76 of the U-profile and through the holes 75, 77 of the longitudinal side 14 of the support structure are performed , In this way, the load roller 18 can be positioned and fixed at a certain position along the longitudinal side 14.

In Fig. 12 is a mobile work platform, which is mounted on a roof construction, shown according to an embodiment of the invention. The load bearing rollers 10 of the working platform 10 can be adjusted in the longitudinal direction of the work platform such that the load roller 23 exactly on the beam 80, the load roller 24 exactly on the beam 82 and the load roller 25 exactly on the Bar 84 is located. Furthermore, guide rollers, which are covered by the working platform, suspended above the beam 80. In this way it is prevented that the working platform 10 slips off the roof construction. By means of the rollers, the working platform can be moved along the bars 80, 82, 84 in the transverse direction. From the work surface 12, workers can dismantle old roof covers 88 on the right side of the work platform 10 and install new roof covers 86 on the left side of the work platform 10. In this way, only a small area of the roof can be uncovered. To the work platform in Fig. 12 Moving further to the right, the shifter 60 can be used. In this case, the displacement device may be a lever mechanism made of aluminum tubes. This comprises a lever unit 62, which has a fastening unit 66 at one end. In this case, the lever unit is pivotally mounted on the fixing unit 66, so that the lever unit 62 is pivotable in a vertical direction. The stabilizing unit 64 includes two arms which are attached to a pivotable ring or tube, whereby the lever unit 62 is guided. In this way, the lever unit 62 against the stabilizing unit 64 pivotally and displaceably. At the end of the arms of the stabilization unit 64 U-profiles 68 are arranged, with which the stabilization unit 64 can be attached to the work platform 10 can. By pressing on the lever unit 62, a pressure on the fastening means 66 can now be given. In this way, the work platform 10 can repel the roof structure and can so in Fig. 12 Continue to move to the right. In order to mount the working platform 10 on the roof construction, it is optionally possible to first adjust the load rollers mounted on the underside to the distances of the beams of the roof construction. Furthermore, the guide rollers of the work platform can be adjusted to the roof structure such that the work platform is flush with the ridge of the roof. Furthermore, when using multiple work platforms, the guide rollers can be adjusted so that the distance between the individual work platforms with each other is not greater than a predetermined maximum dimension, for example, 5 cm. Furthermore, the attachment of an optional railing to the work platform 10 can also be carried out prior to mounting the work platform on the roof structure.

In order to mount the work platform on the roof structure, corrugated sheets may be removed from the roof cover first. Subsequently, the work platform 10 can be lifted, for example, with a crane to the previously exposed location on the roof and placed on the roof structure. After the work platform completely rests on the roof structure, this can be solved for example by a hook of the crane rope. Subsequently, the L-shaped safety bolts can be pivoted and tightened under a structure of the roof structure. In this way, the working platform 10 is protected from tipping and is now operational. Here, workers with personal safety equipment may be connected to a rope securing system attached to the work platform 10.

In Fig. 13 a system according to an embodiment of the invention is shown. In this case, the system comprises a first work platform 10 and a second work platform 9, which are interconnected by means of an adapter module 90. In this case, an end face of the adapter module 90 is connected to an end face of the first work platform 10. In this case, bolts 96 for fastening the adapter module 90 are provided to the first platform 10 through holes. Likewise, one end face of the adapter module is connected to one end face of the second working platform 9. For this purpose, bores 97 are likewise provided, through which a bolt for fastening the adapter module 90 to the second working platform 9 can be guided.

In Fig. 14 an adapter module 90 according to an embodiment of the invention is shown. In this case, the adapter module is made of a rectangular frame which includes a first frame part 92 and a second frame part 94. In this case, the first frame part 92 has a first end side of the adapter module 90 and the second frame part 94 has a second end side of the adapter module 90. Furthermore, the two longitudinal sides of the second frame part 94 are displaceable within the longitudinal sides of the first frame part and can be fixed by means of a bolt 93, which can be guided through bores 95 of the frame parts. Furthermore, the end faces of the adapter module bores 96 and 97, by means of which the adapter module can be connected to adjacent working platforms.

In addition, it should be noted that "comprising" or "having" does not exclude other elements and "a" or "one" does not exclude a plurality. It should also be appreciated that features described with reference to any of the above embodiments or embodiments may also be used in combination with other features of other embodiments or embodiments described above. Reference signs in the claims are not to be considered as limiting.

LIST OF REFERENCE NUMBERS

7

Indentation transversal direction

8th

longitudinal direction

9

working platform

10

working platform

11

Support structure, frame

12

working surface

13

grating

14

long side

15

long side

16

front

17

front sides

18,19,20,21,22, 23,24,25,26,27

Lastrollen

29

rail

30.31

corrugated security bolt

32

railing

34

projection

36

Fasteners for personal protection

38

Fasteners for personal protection

39

Incremental Backup System

40

crossbars

42

leadership

44

guide rollers

46

U-shaped profile

48

U-shaped profile

50.52

L-shaped safety bolt

51

longitudinal axis

53

projection

54.55

Half rail

56

roll cradle

58.59

connecting screw

60

Shifter

62

lever unit

64

stabilization unit

66

fixing unit

68

U-profile

70

Handle

72

U-profile, roller mount

74.76

drilling

75.77

drilling

78

screw

80,82,84

Roof construction, beams

86

new roof cover

88

old roof cover

90

adapter module

92

first frame part

93

screw

94

second frame part

95,96,97

drilling

Claims (11)

1. Mobile working platform (10) for installing and removing roof coverings on a roof structure, comprising:

   a support structure (11);

   at least one load roller (18, 19, 20, 21, 22, 23, 24, 25, 26, 27) which projects downwards beyond an underside of the support structure;

   at least one guide roller (42, 44) which protrudes downwards beyond the underside of the support structure;

   the guide roller protruding downwards beyond a contact surface of the load roller so that it abuts a roof structure;

   the axis of rotation of the guide roller being inclined in relation to the axis of rotation of the load roller;

   the at least one guide roller being 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 making it possible to move the working platform along a roof structure;

   the support structure being formed as a rectangular frame (11);

   the frame having two opposite longitudinal sides (14, 15) which extend in a longitudinal direction (8) of the frame;

   the frame having two opposite end sides (16, 17) which extend in a transverse direction (7) of the frame;

   the at least one load roller being attached to a longitudinal side of the frame and being movable in the longitudinal direction of the frame;

   characterised in that a traverse (40) is attached between the two opposite longitudinal sides (14, 15) of the frame and is movable in the longitudinal direction (8) of the working platform; and

   the at least one guide roller (42, 44) being attached to the traverse (40) such that the at least one guide roller can be brought into contact with a roof structure.
2. Working platform (10) according to claim 1,
   wherein the axis of rotation of the guide roller is inclined in relation to the axis of rotation of the load roller at an angle of between 70° and 110°, preferably between 85° and 95°.
3. Working platform (10) according to either claim 1 or claim 2,
   wherein the at least one load roller (18, 19, 20, 21, 22, 23, 24, 25, 26, 27) has a first axis of rotation having a first angle of less than or equal to 5° in relation to the support structure; and
   wherein the at least one guide roller (42, 44) has a second axis of rotation having a second angle of between 85° and 95° in relation to the support structure.
4. Working platform (10) according to any of the preceding claims,
   wherein the working platform has a first load roller (18), a second load roller, a third load roller (23) and a fourth load roller;
   wherein the working platform has a first guide roller (42) and a second guide roller (44);
   wherein the first load roller (18) and the second load roller are attached to a first longitudinal side (14) of the support structure;
   wherein the third load roller (23) and the fourth load roller are attached to a second longitudinal side (15) of the support structure;
   wherein the axes of rotation of the longitudinal rollers are parallel to one another; and
   wherein the first guide roller (42) and the second guide roller (44) are arranged at the same level with regard to a longitudinal direction of the support structure.
5. Working platform (10) according to any of the preceding claims, further comprising:

   at least one L-shaped safety bolt (50, 52);

   wherein the L-shaped safety bolt is attached to the working platform and protrudes downwards beyond the underside of the support structure; and

   wherein the L-shaped safety bolt is pivotable about an axis (51) which is substantially vertical in relation to the support structure, such that a projection (53) at the end of the L-shaped safety bolt can hook under a construction of a roof structure when said bolt is pivoted.
6. Working platform (10) according to any of the preceding claims, further comprising:

   a working surface,

   wherein a panel (12) and/or grating (13) are fastened to the support structure to form the working surface.
7. Working platform (10) according to any of the preceding claims,
   wherein the at least one load roller (18) and/or the at least one guide roller (42) are suspended such that they oscillate orthogonally to the axis of rotation so that the at least one load roller (18) and/or the at least one guide roller (42) 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.
8. Working platform (10) according to claim 7,
   wherein the angle at which the 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°.
9. Working platform (10) according to any of the preceding claims, further comprising:

   fastening means (36, 38) for fastening a personal protection means,

   wherein the personal protection means is preferably in the form of a handrail (32) of the working platform and/or a lifeline rope safety system (39) for the purpose of personal safety.
10. Working platform (10) according to any of the preceding claims,
    wherein the working platform has a displacement device (60) intended for moving the working platform along the roof structure and comprising:

    a lever unit (62);

    a stabilisation unit (64); and

    a fastening unit (66);

    wherein the stabilisation unit can be fastened to the working platform;

    wherein 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 thereof relative to the stabilisation unit;

    wherein a first end of the rod-shaped lever unit is pivotally connected to the fastening unit; and

    wherein the displacement device can be fastened to a roof structure by means of the fastening unit.
11. System comprising:

    a first working platform (10) according to any of claims 1 to 10; and

    a second working platform (9) according to any of claims 1 to 10;

    an adapter module (90) having:

    a rectangular frame comprising a first frame part (92) and a second frame part (94);

    wherein the first frame part (92) has a first end side of the adapter module (90) and wherein the second frame part (94) has a second end side of the adapter module (90);

    wherein the first frame part (92) and the second frame part (94) can be fixed such that they are movable relative to one another;

    wherein 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.

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