Work platform for work on the roof area of ​​a vehicle, in particular on the roof area of ​​an electric vehicle, as well as maintenance equipment with at least one such work platform.

Description

[0001] The present invention relates to a work platform for working on a roof area of ​​a vehicle, in particular on a roof area of ​​an electrified vehicle, according to the preamble of patent claim 1, as well as to a maintenance facility with at least one work platform according to the preamble of patent claim 15. Technological background

[0002] Roof work is frequently performed on vehicles, whether for new installations or maintenance work. Especially on vehicles and trucks, this work is carried out at a height of several meters above the ground. Therefore, safety measures are necessary to significantly reduce the risk of workers falling while performing work.

[0003] Electrified vehicles are equipped with live parts, such as pantographs, on the roof area. As long as current is flowing, workers must be prevented from coming into contact with any of these live parts. The voltage in such vehicles can exceed 10,000 V, meaning contact with the live parts can have serious consequences.

[0004] The state of the art includes work platforms for working on the roof area of ​​a vehicle, which have a railing as fall protection and as protection against live components.

[0005] For example, AU2011100718A4 shows a work platform with two work areas. The platform of the work platform has stationary platform elements that form a working level and each have a longitudinal extension with two opposite long sides. A railing runs along each of these long sides as a fall protection device and as protection against live components. Furthermore, several movable platform elements are provided, which are arranged below the stationary platform elements and, after a vehicle has entered, can be moved from this first position parallel to these stationary platform elements towards the vehicle (second position). In the extended state, the railing is set back from the free edge of the movable platform elements. After ensuring that no current is flowing, individual gates in the railing are unlocked so that the worker can reach the roof area of ​​the vehicle.

[0006] Another such work platform is known from KR102126326B1. A railing runs along each of the long sides of the stationary platform element as a fall protection device. One of the railings has open sections that allow lockable access to the work area. A movable platform element is provided in the access area. This is arranged below the stationary platform element and, after a vehicle has entered, can be moved from this first position parallel to these stationary platform elements toward the vehicle (second position). When extended, the railing is set back from the free edge of the movable platform element.

[0007] The disadvantage of these known solutions is that the railing hinders free working on the working level.

[0008] From KR20070118404A, another such work platform is known, in which movable platform elements are provided, which are arranged below the stationary platform element and, after entry of a vehicle, can be moved from this first position parallel to these stationary platform elements in the direction of the vehicle (second position).

[0009] The RU176334U1 shows a work platform with a pivoting walkway attached to a stationary platform element. When pivoted down, the walkway allows maintenance work only at the front of a retracted vehicle.

[0010] Furthermore, it is generally known from the state of the art to provide removable railings on a work platform which can be removed and repositioned as required.

[0011] The disadvantage of this well-known solution is that dismantling and reassembling the railings is complex and time-consuming. There is also a risk that a railing will be dismantled before the power is turned off or while there is still a potential fall hazard for workers. Description of the invention

[0012] The object of the invention is to provide a generic work platform and a generic maintenance device which do not have at least one of the aforementioned disadvantages and in particular enable efficient and safe work on a roof area of ​​a vehicle.

[0013] These objects are achieved by the features of the independent patent claims. Advantageous developments of the invention are specified in the dependent patent claims.

[0014] The work platform according to the invention for working on a roof area of ​​a vehicle, in particular on a roof area of ​​an electrified vehicle, comprises at least one platform, wherein the at least one platform has at least one first platform element that forms a working plane and has a longitudinal extension with two opposite longitudinal sides, and at least one second platform element that is arranged along at least one of the longitudinal sides of the at least one first platform element and can be transferred between two positions relative to the at least one first platform element. In a first position, the at least one second platform element forms a fall protection device and, in a second position, a continuation of the working plane of the at least one first platform element.The at least one second platform element has at least one free end, wherein at least one distance bridging device is provided in the region of the free end of the at least one second platform element for at least partially bridging a distance between the free end of the at least one second platform element and a vehicle located in the work platform. The at least one distance bridging device has a plurality of spacer elements that can be displaced parallel to one another.

[0015] In the first position, the at least one second platform element is oriented transversely to the working plane spanned by the at least one first platform element. In this first position, the at least one second platform element provides fall protection and simultaneously prevents contact between workers on the at least one first platform element and live components, similar to a railing.

[0016] The dimensions of the at least one second platform element are preferably selected such that they comply with the relevant standards across the working plane. For example, for low-voltage systems, a dimension corresponding to a railing height of at least 1.10 m is sufficient. For high-voltage systems, however, the dimensions of the at least one second platform element required correspond to a railing height of at least 1.80 m.

[0017] It is particularly advantageous that at least one second platform element in the first position is aligned substantially perpendicular to this working plane, thus providing the workers with a high sense of security.

[0018] As long as the live components are still live and / or there is a risk of workers falling, at least one second platform element will remain in the first position. Only when it is ensured that these two risks no longer exist will the at least one second platform element be moved to its second position.

[0019] Since in the second position the at least one second platform element forms a continuation of the working plane of the at least one first platform element, the entire working plane is available to the workers, with no structural safety device restricting the working area around the roof area of ​​the vehicle.

[0020] Advantageously, a control system is provided that enables a controlled transfer of the at least one second platform element from one position to the other. For example, electrical, pneumatic, or hydraulic means are also provided for this purpose. This control system is further advantageously designed such that a transfer of the at least one second platform element only occurs when this process does not pose a danger to workers on or below the platform.

[0021] The at least one distance bridging device on at least one free end of the at least one second platform element ensures that the at least one second platform element can be transferred from one position to the other without risk of damage to the positioned vehicle, and at the same time, an existing gap between the free end of the at least one second platform element is reduced to a tolerable level or completely closed. This prevents, in particular, work equipment, such as tools, from inadvertently falling through the gap, which could cause damage to the vehicle or injure workers below the work platform.

[0022] With the several spacer elements of the at least one distance bridging device that can be moved parallel to one another, the gap to the outside of the vehicle can be easily reduced or closed to fit the contour of this outside.

[0023] Preferably, the at least one second platform element is pivotably arranged on the at least one first platform element, thus enabling a simple structural design for a targeted transfer of the at least one second platform element between the two positions.

[0024] Preferably, the at least one second platform element is constructed in multiple parts, with one of the platform element parts being transferable between two positions relative to another platform element part. This allows, for example, a fall protection device to be implemented that can meet both low-voltage and high-voltage standards. Furthermore, in a maintenance system with high-voltage current, the space required by the at least one second platform element in the second position can be reduced, for example, by folding the platform element parts together.

[0025] Advantageously, at least one compression section is provided at a free end of the at least one distance-bridging device, which deforms upon contact with an exterior of the vehicle, thus preventing damage to the vehicle in the event of contact between the advanced at least one distance-bridging device and the exterior of the vehicle. Furthermore, at least one such compression section can be used to compensate for existing unevenness on the exterior of the vehicle, for example.

[0026] The at least one distance bridging device can advantageously be moved between its positions in a controlled manner. Furthermore, the at least one distance bridging device is spring-loaded, with the spring force acting on the at least one distance bridging device in a particularly advantageous manner, such that it is forced into a parking position by the spring force. The feed mechanism for advancing the at least one distance bridging device is designed such that it can overcome the spring force.

[0027] Advantageously, the plurality of mutually displaceable spacer elements of the at least one distance bridging device can be transferred separately from one another in a controllable manner between a parking position and a distance bridging position, which simplifies precise positioning of the same.

[0028] Further preferably, the plurality of mutually displaceable spacer elements are spring-loaded, with the spring force acting on the displaceable spacer elements particularly advantageously in such a way that they are forced into their parking position. The feed device or feed devices for advancing the plurality of mutually displaceable spacer elements are designed such that they can overcome the corresponding spring force.

[0029] Preferably, a plurality of second platform elements are provided along at least one longitudinal side of the at least one first platform element, whereby the elements of the work platform can be easily adapted to the corresponding length of the vehicle.

[0030] Advantageously, each of the second platform elements can be moved between two positions independently of the other second platform elements, which further simplifies the adaptability of the work platform, e.g., to the effective length of the vehicle.

[0031] Preferably, at least two first platform elements are provided, which are spaced apart from one another to form a receiving area for receiving the vehicle between the two first platform elements. The second platform elements of the two first platform elements are each arranged on the longitudinal sides of the same, facing one another. If the second platform elements are each in the second position, the roof area of ​​the vehicle is accessible from both sides. If the second platform elements are each in the first position, the workers can move safely on both sides of the receiving area.

[0032] Preferably, the first platform element has at least one second platform element on each of its longitudinal sides between two vehicle receiving areas, wherein each at least one second platform element on one longitudinal side of the first platform element can be moved from the first position to the second position independently of the other at least one second platform element on the other longitudinal side of the first platform element. This allows the space requirement for a work platform with multiple receiving areas to be significantly reduced or optimized.

[0033] Preferably, at least two end elements are provided on each first platform element as second platform elements, wherein the at least two end elements are designed to close off the receiving area at the front in the second position. The at least two end elements protect the workers, particularly against falls, in the area of ​​the front or front contour and the rear or rear contour of the vehicle.

[0034] Advantageously, a further distance bridging device is provided on each of these end elements, whereby a gap between the corresponding free ends and the exterior of the vehicle can be reduced or closed in these areas as well. The further distance bridging device is designed, for example, like the at least one distance bridging device on the free end of the second platform elements.

[0035] Preferably, at least one end element has a front element that can be transferred from a parking position into a working position, whereby a greater distance can be overcome in the second position with the end element if required, but the end element can also be arranged anywhere between the ends of the at least one first platform element, which enables the work platform to be used with different vehicle lengths.

[0036] Advantageously, the front element is arranged so that it can be pivoted, which enables a simple structural design for a targeted transfer of the front element between the two positions.

[0037] Preferably, at least one fall protection element is arranged on at least one of the second platform elements in order to easily ensure fall protection also transversely to the long side of the at least one first platform element.

[0038] Advantageously, the at least one fall protection element can be transferred from a storage position into a securing position, so that it can be positioned as required, but does not hinder or restrict the positioning of the at least one second platform element and / or the at least one end element.

[0039] Further advantageously, the at least one fall protection element is pivotably arranged on the at least one of the second platform elements, thus enabling a simple structural design for a targeted transfer of the at least one fall protection element between the two positions.

[0040] Preferably, a position detection device is provided for detecting the position of a vehicle in the work platform, which enables the control system or the operator of the work platform to move or have moved at least one of the at least one second platform element from the first position to the second position depending on the detected position of the vehicle. The position detection device comprises, for example, sensors such as one or more light grids.

[0041] Advantageously, the position detection device is designed to detect the type or type of vehicle located on the work platform. For example, based on a database containing the dimensions of various vehicles, the distance bridging device is moved via the control system, which enables quick adjustment and further reduces the risk of damage.

[0042] Preferably, a positioning device is provided for positioning the vehicle along the work platform, which, for example, enables the driver of the vehicle to position their vehicle correctly. For example, the driver receives a visual instruction to drive the vehicle forward, stop the vehicle, or reverse the vehicle. The display of the positioning device can have sensors and can also advantageously be designed analogously to a display of a car wash system, which is generally known to those skilled in the art.

[0043] Preferably, at least one work level safety device is provided to detect objects and persons on the work level, ensuring that no objects or persons are present before one of the elements or a part of the work platform is transferred. This significantly reduces the risk of accidents.

[0044] Advantageously, the at least one work level safety device comprises a scanner, in particular a laser scanner. The use of a rotary scanner has proven particularly preferred for this purpose.

[0045] The maintenance device according to the invention for working on roof areas of vehicles, in particular on roof areas of electrified vehicles, comprises at least one work platform which has at least some of the aforementioned features. Character description

[0046] The invention is explained in more detail with reference to exemplary embodiments in the following figures. The list of reference symbols forms part of the disclosure.

[0047] Positional references such as "top", "bottom", "right" or "left" refer to the respective illustrations and are not to be understood as limiting.

[0048] The figures are described in a coherent and comprehensive manner. The same reference symbols refer to the same components. Fig. 1 shows a maintenance device according to the invention for vehicle maintenance with a work platform according to the invention in cross section; Fig. 2 shows a work platform according to the invention with two work areas in a perspective top view; Fig. 3 shows a section of the Figure 1 shown maintenance device in a plan view; Fig. 4 a front view of a maintenance device according to the invention according to line IV-IV in Figure 3 ; Fig. 5 a closing element in a perspective top view; Fig. 6 the Figure 5 shown end element without cover; Fig. 7 a flow chart of the process for operating a maintenance device according to the invention; Fig. 8 the variant of the maintenance device according to the Figure 2in a plan view; and Fig. 9 a front view of the maintenance device according to the invention according to line IX-IX in Figure 8 . Implementation of the invention

[0049] The following drawings show rail-bound, electrified vehicles. However, the invention is not limited to this type of vehicle; it can also be applied to work on the roof area of ​​any other vehicle, such as trucks, buses, and mobile homes, although this list is not exhaustive.

[0050] The Figure 1The maintenance facility 11 shown for the maintenance of rail-bound, electrified vehicles 12, e.g., locomotives, train compositions, trams, etc., has a work platform 21 according to the invention for work on the roof area of ​​the vehicles 12. In this example, five work areas 14 are available, allowing work to be carried out on up to five vehicles 12 simultaneously. Each work area 14 has a work pit 15 for work underneath the vehicle 12. In an area above the vehicle 12, an overhead conductor rail 16 is provided for each work area 14, which can be folded up after the corresponding vehicle 12 has been positioned in the maintenance facility 11. After the maintenance work has been completed, the corresponding overhead conductor rail 16 is folded down again, and the vehicle 12 can leave the maintenance facility 11 again. Each work area 14 can additionally have a movable overhead crane 17.

[0051] A first variant of a working platform 31 according to the invention with two receiving areas 32 and 33 is shown in the Figures 2 to 4 shown. The elements of the work platform 31 in the first work area 32, which are described in more detail below, are located in a position into which a vehicle 12 can enter. In the second work area 33, a vehicle 12 is already located there, and the elements of the work platform 31, which are described in more detail below, are located in a position in which work can be carried out on the roof area of ​​the vehicle 12 without significant restrictions.

[0052] The work platform 31 comprises a platform 36 which has three first platform elements 37, 57 and 67 which form a working level 34.

[0053] In a variant not shown here, the first platform elements of a work platform can also be arranged offset from one another or staggered, for example to take local conditions and / or architectural requirements into account.

[0054] The first platform element 37, shown here top left, has a longitudinal extension with two opposing longitudinal sides 38 and 39. Fixed railings 40 and two secured access steps 41 for the workers are provided at each end and along the outer longitudinal side 38 of the first platform element 37.

[0055] Along the longitudinal side 39 of the first platform element 37, several second platform elements (46 to 54, see below) are provided, which can be moved between two positions. In the first position shown here, these form a fall protection device, and in a second position, which will be described in more detail below in connection with the work area 33, they form at least a partial continuation of the work plane 34.

[0056] In this exemplary embodiment, the second platform elements - starting from the top right - are a closing element 46, three similarly designed intermediate elements 47, 48 and 49, an intermediate closing element 50, an intermediate element 51 with fall protection element 118, a further intermediate closing element 52, a further intermediate element 53 with fall protection element 118 and a further closing element 54, each arranged pivotably.

[0057] The central first platform element 57 has a longitudinal extension with two opposite longitudinal sides 58 and 59. Fixed railings 60 and two secured access routes 61 for the workers are provided at each end. Fixed railings 62 are also advantageously provided along the access openings.

[0058] Along the longitudinal side 58 of the central first platform element 57, several second platform elements (66 to 74, see below) are provided, which can also be moved between two positions. In the first position shown here, these form a fall protection device, and in a second position, which will be described in more detail below in connection with the work area 33, they form at least a partial continuation of the work plane 34.

[0059] The plurality of second platform elements 66 to 74 and the plurality of second platform elements 46 to 54 face one another and are essentially mirror images of the second platform elements 46 to 54 of the first platform element 37. Thus, again starting from the top right, an end element 66, three similarly designed intermediate elements 67, 68, and 69, an intermediate end element 70, an intermediate element 71 with a fall protection element 119, a further intermediate end element 72, a further intermediate element 73 with a fall protection element 119, and a further end element 74 are each pivotably arranged.

[0060] Along the longitudinal side 59 of the central first platform element 57, several second platform elements (46 to 54, each of identical design to the second platform elements with the same reference numerals on the upper first platform element 37) are provided, which can be moved between two positions. In the positions shown here, the second platform elements 46 to 50 form a continuation of the working plane 34, with the second platform elements 51 to 54 further forming a fall protection device.

[0061] The first platform element 77, shown here at the bottom right, is essentially a mirror image of the first platform element 37 shown at the top left. Thus, the first platform element 77 also has a longitudinal extension with two opposing longitudinal sides 78 and 79. Fixed railings 80 and two secured access steps 81 for the workers are provided at each end and along the outer longitudinal side 79 of the first platform element 77.

[0062] Along the longitudinal side 78 of the first platform element 77, a plurality of second platform elements (66 to 74, each of identical design to the second platform elements and with the same reference numerals on the central first platform element 57) are provided, which can be moved between two positions. In the positions shown here, the second platform elements 66 to 70 form a continuation of the working plane 34, with the second platform elements 71 to 74 further forming a fall protection device.

[0063] The following statements in connection with the end element 46 also apply analogously or mutatis mutandis to the other end elements 54, 66, and 74. The end element 46 has a railing section on its upper side as a pivotably arranged fall protection element 86, which rests on the upper side of the end element 46 in the first position. In the second position, the fall protection element 86 closes off the work platform 31 in this area. A first distance bridging device 88 and a second distance bridging device 89 are provided on the underside of the end element 46.

[0064] The following statements in connection with the intermediate element 47 also apply analogously or mutatis mutandis to the other intermediate elements 48, 49 and 67, 68, 69. A distance bridging device 91 is provided on the underside of the intermediate element 47.

[0065] The distance bridging devices mentioned above are described in more detail below in connection with the intermediate termination elements 50, 52 and 70, 72.

[0066] The following explanations (see also Figures 5 and 6) in connection with the intermediate end element 50 also apply analogously or mutatis mutandis to the other intermediate end elements 52 or 70, 72. The intermediate end element 50 has an L-shaped basic structure in plan view, wherein the intermediate end element 50 is pivotally arranged with the longer side 96 on the first platform element 37. The intermediate end element 50 is also designed in several parts and thus has a first platform element part 97 and a front element 106 pivotally connected to the latter. On the underside of the first platform element part 97 in the region of its free end, a first distance bridging device 98 for bridging a gap between the vehicle and the first platform element part 97 is provided.

[0067] On the underside of the front element 106, in the region of its free end, a further distance bridging device 107 is provided for bridging a gap between the front or rear end of the vehicle 12 and the front element 106.

[0068] The distance bridging devices 88, 91, 98 and 116 are designed in the same way, which is why the following explanations regarding the distance bridging device 98 also apply to the distance bridging devices 88, 91 and 116. As in Figure 6 As can be seen, the distance bridging device 98 comprises a plurality of spacer elements 99 arranged next to one another and displaceable relative to one another, which are spring-loaded by a spring element 101. A compression section 100 is provided at the free end of the spacer elements 99, which is deformable under pressure.

[0069] The additional distance bridging devices 89 and 107 are designed similarly, which is why the following explanations regarding the distance bridging device 107 also apply to the distance bridging device 89. The additional distance bridging device 107 also comprises a plurality of spacer elements 108 arranged next to one another and movable relative to one another, which are spring-loaded by a spring element 110. A compression section 109, which is deformable under pressure, is provided at the free end of the spacer elements 108.

[0070] The spacer elements 99 and 108 are moved in a controlled manner, for example individually or in a group of several, e.g., four to six, spacer elements 99 and 108, respectively, between a parking position and a distance bridging position. The control system or the corresponding mechanism is advantageously designed such that a spacer element 99 and 108, respectively, stops moving upon contact with the exterior of the vehicle 12, while the other spacer elements 99 and 108, respectively, not yet in contact with the exterior of the vehicle 12, can continue to be advanced.

[0071] The following statements in connection with the intermediate element 51 apply analogously or mutatis mutandis to the other intermediate elements 53 and 71, 73. A distance bridging device 116 and a pivotably arranged fall protection element 118 are provided on the underside of the intermediate element 51, which can be transferred from a storage position to a securing position. In the securing position, the fall protection element 118 enables the frontal closure of a portion of the work platform (see Figures 2 and 3 ).

[0072] The arrangement and design of the second platform elements 46 to 54 and 66 to 74 shown and described here is based on the illustrated configuration of the work platform 31. For example, the second platform elements can comprise more or fewer intermediate elements or intermediate end elements. The end elements 46 and 54 and 66 and 74 shown are advantageously always present as starting and end elements, but are not absolutely necessary.

[0073] To detect the position of a vehicle 12 within the recording area 33, a position detection device is provided, which comprises, for example, several light grids 121, 122.

[0074] Furthermore, a positioning device 126 is provided for positioning the vehicle 12 along the work platform 31, which indicates the correct position of the vehicle 12 to the driver.

[0075] On the working area 34 of the working platform 31, several rotation scanners 127, 128 are provided as a working level safety device for detecting objects and persons on the working level 34.

[0076] For the entry of a vehicle 12 into the corresponding work area, the second platform elements 46 to 54 and 66 to 74 are in the first position, as shown in the work area 32. Once the vehicle 12 is correctly positioned, the corresponding second platform elements 46 to 50 and 66 to 70 are moved to the second position, preferably in a controlled and independent manner.

[0077] In the case of the intermediate end element 50, the front element 106 is first pivoted out so that in the second position of the intermediate end element 50, this also forms a continuation of the working plane 34.

[0078] Subsequently, all distance bridging devices 88, 89, 91, 98, 107 and 116 of the second platform elements 46 to 54 and 66 to 74 are moved forward until the gap between the free end of the corresponding second platform element 46 to 54 and 66 to 74 and the outside of the vehicle 12 is closed or at least partially bridged.

[0079] Using the flow chart according to Figure 7 The functionality of a work platform 31 is described in detail below.

[0080] At step 131, the vehicle 12 waits outside the maintenance facility 11. The overhead conductor rail 16 is energized and swung down. The second platform elements 46 to 54 and 66 to 74 are in the first position (folded up). The first platform elements 37, 57, and 77, respectively, represent a protected area for the workers, allowing them to be accessed safely.

[0081] In step 132, the vehicle 12 enters. When passing the first light barrier 121 (entry side), the horizontal light grids of the work platform 31 are activated.

[0082] In step 133, the vehicle 12 is correctly positioned using the positioning device 126, which here features a visual indicator. Warning lights, e.g., rotating warning lights, are activated on the work platform 31 to raise workers' awareness. Final positioning is performed via automatic length detection in the form of horizontal light grids 121, 122 placed on both sides.

[0083] In step 134, the ceiling conductor rail 16 is earthed and then swung up.

[0084] In step 135, the second platform elements 46 to 54 and 66 to 74, which are located along the positioned vehicle 12, are moved to the second position (folded down). The other second platform elements 46 to 54 and 66 to 74 remain in the first position and thus continue to provide fall protection. The vehicle 12 is still inaccessible.

[0085] In step 136, the distance bridging devices 88, 89, 91, 98, 107, and 116 of the second platform elements 46 to 54 and 66 to 74 located in the second position are advanced until the gap between the free ends of the second platform elements 46 to 54 and 66 to 74 and the exterior of the vehicle 12 is at least partially bridged. Any remaining gap advantageously does not exceed 12 cm. For safety reasons, only the area of ​​the first platform elements 37, 57, or 77 remains accessible during this step 136.

[0086] In step 136, the fall protection elements 86 and, if necessary, the fall protection elements 118 and 119 are also pivoted into the securing position.

[0087] In step 137, the warning lights are now switched off, signaling to the workers that the working level 34 of the work platform 31 is now accessible without restriction for maintenance work on the vehicle 12.

[0088] In step 138, the overhead crane 17 can be put into operation to support the maintenance or repair work.

[0089] In step 139, the maintenance work is completed. The overhead crane 17 is guided to its parking position and advantageously secured there. Furthermore, the position of the overhead crane 17 is monitored with suitable sensors. The workers, along with all mobile objects, leave the working area of ​​the second platform elements 46 to 54 and 66 to 74.

[0090] In step 140, the warning lights are reactivated. A worker can then initiate the process of transferring the second platform elements 46 to 54 and 66 to 74 from the second position to the first position, preferably with a safety element such as a badge. The working areas of the second platform elements 46 to 54 and 66 to 74 are scanned with the rotary scanners 127 and 128 to verify that there are no persons or objects in these working areas.

[0091] If the check with the rotation scanners 127 and 128 shows that neither persons nor objects are present, the distance bridging devices 88, 89, 91, 98, 107, and 116 are retracted in step 141. Light grids are also activated, which monitor the transition between the first platform elements and the second platform elements 46 to 54 and 66 to 74. If a person crosses the transition, an acoustic warning signal is triggered, and the retraction of the distance bridging devices 88, 89, 91, 98, 107, and 116 is stopped.

[0092] In step 141, the fall protection elements 86 and, if necessary, also the fall protection elements 118 and 119 are pivoted into the storage position.

[0093] After the distance bridging devices 88, 89, 91, 98, 107, and 116 have retracted, the second platform elements 46 to 54 and 66 to 74, which are in the second position, are moved or pivoted upwards into the first position in step 142. A warning, for example, a longer acoustic signal, is triggered before the transfer process.

[0094] As soon as all second platform elements 46 to 54 and 66 to 74 are in the first position, the corresponding ceiling conductor rail 16 is swung down in step 143 and then energized. The warning lights are now turned off.

[0095] Now the serviced vehicle 12 can leave the maintenance facility 11 (step 144).

[0096] In an optional step, the corresponding ceiling conductor rail 16 can be folded up again so that the overhead crane 17 is available again, e.g. for clearing the work platform 31.

[0097] The Figures 8 and 9 The variant of a work platform 231 shown here basically corresponds to the previously described work platform 31, although it is designed for vehicles 212 powered by high voltage. Comparable elements of the work platform 31 have a reference number increased by 200.

[0098] The second platform elements 246 to 254 and the second platform elements 266 to 274 of the platform 236 are in their first position, so that they form a fall protection device and protection against live components, and a vehicle 212 can drive into the first work area 232. In the second work area 233, a vehicle 212 is already located there, and the corresponding second platform elements 246 to 254 and the second platform elements 266 to 274 are in their second position, in which work can be carried out on the roof area of ​​the vehicle 212.

[0099] The first platform element 237 shown above has a secured access step 241 for workers at each end face, which can be folded together for the entry or exit of a vehicle 212. In the folded position of the access step 241, the first platform element 237 cannot be climbed.

[0100] The secured ascents 261 to the middle first platform element 257 are in the position in which the middle first platform element 257 can be climbed by the workers.

[0101] Since high voltage is present here, the dimensions of the second platform elements 246 to 254 and 266 to 274 in the first position above the corresponding first platform element 237, 257, or 277 must be at least 1.80 m according to the applicable standards. Among other things, to keep the overall width dimensions of the maintenance facility as small as possible, the distance between a first platform element 237, 257, or 277 and a vehicle 212 located in the work platform 231 is smaller than this dimension. Accordingly, the second platform elements 246 to 254 and 266 to 274 are designed in multiple parts.

[0102] In Figure 9The second platform element 274 shown on the left is shown in the first position and has a first platform element part 275 and a second platform element part 276. The first platform element part 275 is pivotally mounted on the second platform element part 276. In the first position, the first platform element part 275 lies in the extension of the second platform element part 276.

[0103] The Figure 9The second platform element 254 shown is shown in its second position and is also constructed in multiple parts. The first platform element part 263 is pivoted relative to the second platform element part 264, so that this second platform element 254 is folded together. The second platform element 254 is designed such that the distance bridging device 265 can be advanced to close the remaining gap between the folded second platform element 254 and the exterior of the vehicle 212. For example, corresponding recesses are provided for this purpose.

[0104] Although the invention is illustrated and described in detail by means of the figures and the accompanying description, this illustration and this detailed description are to be understood as illustrative and exemplary and not as limiting the invention. It is understood that those skilled in the art may make changes and modifications without departing from the scope of the following claims. List of reference symbols

[0105] 11Maintenance facility 12Vehicle 14Working area 15Working pit 16Overhead conductor rail 17Overhead crane 21Work platform 31Working platform 32Working area 33Working area 34Working level 36Platform 371st platform element 38Long side of 37 39Outer long side of 37 40Railing 41Ascent 46End element 47Intermediate element 48Intermediate element 49Intermediate element 50Intermediate end element 51Intermediate element 52Intermediate end element 53Intermediate element 54End element 571. Platform element 58Long side of 57 59Outer long side of 57 60Railing 61Ascent 62Railing around 61 66End element 67Intermediate element 68Intermediate element 69Intermediate element 70Intermediate end element 71Intermediate element 72Intermediate end element 73Intermediate element 74End element 771. Platform element 78Long side of 37 79Outer long side of 37 80Railing 81Ascent 86Fall protection element 881. Distance bridging device 892. Distance bridging device 91Distance bridging device 96longer side of 50 971. Platform element part 981. Distance bridging device 99Spacer element 100Compression section 101Spring element 106Front element 1072. Distance bridging device 108Spacer element 109Compression section 110Spring element 116Distance bridging device 118Fall protection element 119Fall protection element 121Light grid 122Light grid 126Positioning device 127Rotation scanner 128Rotation scanner 131-145Procedure steps 212Vehicle 231Work platform 232Work area 233Work area 236Platform 2371. Platform element 241 Ascent 246 End element 247 Intermediate element 248 Intermediate element 249 Intermediate element 250 Intermediate end element 251 Intermediate element 252 Intermediate end element 253 Intermediate element 254 End element 2571. Platform element 261 Ascent 2631. Platform element part of 254 2642. Platform element part of 254 265Distance bridging device 266End element 267Intermediate element 268Intermediate element 269Intermediate element 270Intermediate end element 271Intermediate element 272Intermediate end element 273Intermediate element 274End element 2751. Platform element part of 274 2762. Platform element part of 274 2771. Platform element

Claims

1. A work platform for working on a roof area of a vehicle, particularly on a roof area of an electrified vehicle (12; 212), comprising at least one platform (36; 236), the at least one platform (36; 236) having at least one first platform element (37, 57, 77; 237, 257, 277), which forms a work plane (34), and a longitudinal extent with two mutually opposite long sides (38, 39, 58, 59, 78, 79), and having at least one second platform element (46 to 54, 66 to 74; 246 to 254, 266 to 274), which is arranged along at least one of the long sides (39, 58, 59, 78) of the at least one first platform element (37, 57, 77; 237, 257, 277) and can be transferred between two positions with respect to the at least one first platform element (37, 57, 77; 237, 257, 277), characterized in that the at least one second platform element (46 to 54, 66 to 74; 246 to 254, 266 to 274) forms a fall protection device in a first position and a continuation of the work plane (34) of the at least one first platform element (37, 57, 77; 237, 257, 277) in a second position, wherein the at least one second platform element (46 to 54, 66 to 74; 246 to 254, 266 to 274) has at least one free end, wherein in the region of the free end of the at least one second platform element (46 to 54, 66 to 74; 246 to 254, 266 to 274) at least one distance bridging device (88, 89, 91, 98, 107, 116; 265) is provided for at least partial bridging of a distance between the free end of the at least one second platform element (46 to 54, 66 to 74; 246 to 254, 266 to 274) and a vehicle (12; 212) located in the work platform, wherein the at least one distance bridging device (88, 89, 91, 98, 107, 116; 265) has a plurality of spacer elements (99, 108), which can be moved parallel to one another.

2. The work platform according to Claim 1, characterized in that the at least one second platform element (46 to 54, 66 to 74; 246 to 254, 266 to 274) is arranged in a pivotable manner on the at least one first platform element (37, 57, 77; 237, 257, 277).

3. The work platform according to Claim 1 or 2, characterized in that the at least one second platform element (50, 52; 70, 72; 246 to 254, 266 to 274) is constructed in a multipart manner, wherein one of the platform element parts (97; 263, 275) can be transferred between two positions with respect to a different platform element part (98; 264, 276).

4. The work platform according to Claims 1, characterized in that at least one compression section (100, 109) is preferably provided at a free end of the at least one distance bridging device (88, 89, 91, 98, 107, 116; 265), and wherein further preferably, the at least one distance bridging device (88, 89, 91, 98, 107, 116; 265) is spring-loaded.

5. The work platform according to Claim 4, characterized in that the plurality of spacer elements (99, 108), which can be moved parallel to one another, can be transferred in a controllable manner separately from one another between a park position and a distance bridging position, and are further preferably spring-loaded.

6. The work platform according to one of Claims 1 to 5, characterized in that a plurality of second platform elements (46 to 54, 66 to 74; 246 to 254, 266 to 274) are provided along at least one long side (39, 58, 59, 78) of the at least one first platform element (37, 57, 77), wherein preferably each of the second platform elements (46 to 54, 66 to 74; 246 to 254, 266 to 274) can be transferred between two positions independently of the other second platform elements (46 to 54, 66 to 74; 246 to 254, 266 to 274).

7. The work platform according to one of Claims 1 to 6, characterized in that at least two first platform elements (37, 57, 77) are provided, which are spaced from one another with the formation of an accommodating region (32, 33; 232, 233) for accommodating the vehicle (12, 212) between the two first platform elements (37, 57, 77), wherein the second platform elements (46 to 54, 66 to 74; 246 to 254, 266 to 274) of the two first platform elements (37, 57, 77) are respectively arranged on the long side (39, 58, 59, 78) of the same, which sides face one another.

8. The work platform according to Claim 7, characterized in that the first platform element (57; 257) has at least one second platform element (46 to 54, 66 to 74; 246 to 254, 266 to 274) respectively on both of its long sides (58, 59) between two accommodating regions (32, 33; 232, 233) for the vehicles (12; 212), wherein each at least one second platform element (66 to 74; 266 to 274) on one long side (58) of the first platform element (57; 257) can be transferred from the first position to the second position independently of the other at least one second platform element (46 to 54; 246 to 254) on the other long side (59) of the first platform element (57; 257).

9. The work platform according to Claim 7 or 8, characterized in that at least two closing elements (46, 50, 52, 54, 66, 70, 72, 74; 246, 250, 252, 254, 266, 270, 272, 274) are provided as second platform elements on each first platform element (37, 57, 77; 237, 257, 277), wherein the at least two closing elements (46, 50, 52, 54, 66, 70, 72, 74; 246, 250, 252, 254, 266, 270, 272, 274) are formed in the second position for end-face closure of the accommodating region (32, 33; 232, 233), wherein preferably in each case, a further distance bridging device (89, 107) is provided on these closing elements (46, 50, 52, 54, 66, 70, 72, 74; 246, 250, 252, 254, 266, 270, 272, 274).

10. The work platform according to one of Claims 7 to 9, characterized in that at least one closing element (50, 52, 70, 72; 250, 252, 270, 272) has a front element (106), which can be transferred from a park position to a work position, wherein the front element (106) is preferably arranged in a pivotable manner.

11. The work platform according to one of Claims 7 to 10, characterized in that at least one fall protection element (86, 118, 119) is arranged on at least one of the second platform elements (46, 51, 53, 54, 66, 71, 73, 74), wherein preferably the at least one fall protection element (86, 118, 119) can be transferred from a storage position to a safety position, and further preferably, the at least one fall protection element (86, 118, 119) is arranged in a pivotable manner on the at least one of the second platform elements (46, 51, 53, 54, 66, 71, 73, 74).

12. The work platform according to one of Claims 1 to 11, characterized in that a position detection device (121, 122) is provided for detecting the position of a vehicle in the work platform.

13. The work platform according to one of Claims 1 to 11, characterized in that a positioning device (126) for positioning the vehicle (12) is provided along the work platform (31).

14. The work platform according to one of Claims 1 to 13, characterized in that at least one work plane safety device is provided for detecting objects and people on the work plane (34), wherein the at least one work plane safety device preferably comprises a scanner, particularly preferably a rotary scanner (127, 128) and / or a thermal imaging camera (129) as thermal scanner.

15. A maintenance device for working on roof areas of vehicles, particularly on roof areas of electrified vehicles (12; 212), comprising at least one work platform (21; 31; 231) according to one of Claims 1 to 14.