WO1992008023A1 - Erection scaffolding with lifting tackle - Google Patents

Abstract

Box-type erection scaffolding with a platform lift, the height of which can be steplessly adjusted by hoisting tackle along supports arranged upright on a frame, said hoisting tackle comprising a cable winding device arranged on the platform lift for the synchronous winding and unwinding of hoisting cables or similar, whereby two hoisting cables are joined to form one and taken over a shared cable drum. The hoisting cables (10) are taken from the cable drum (17) over a first deflection roller (18) arranged on the platform lift (2), over a second deflection roller (20) arranged at the upper end (19) of the relevant support (5), over a third deflection roller (21) fitted on the platform lift (2), over a fourth such roller (22) again fitted at the upper end (19) of the relevant support (5), over a fifth (24) at the lower end (23) of the relevant support (5) or on the frame (1), superficially diagonally to a transverse side (11) along the erection scaffolding over a sixth deflection roller (25) arranged on the platform lift (2) in the region of the neighbouring support (5') and superficially diagonally to a longitudinal side along the erection scaffolding to the anchor point at the lower end (23) of the support (5'') alongside support (5') or on the frame (1).

Description

 Assembly scaffold with pulley

description

The invention relates to a box-shaped assembly scaffold with a lifting platform, which is vertically adjustable lengthways upright on a frame arranged supports by lifting means, which comprise a cable winding device arranged on the lifting platform for synchronous winding and unwinding of lifting cables or the like, each of which two hoisting ropes are connected to one another to form a common rope and are guided by a common rope drum.

Such a mounting frame is known from EP 0 219 883 B1. With this assembly scaffold, which has already proven itself extremely well in practice, a high degree of stability is achieved in any height position of the lifting platform with relatively little design effort, the lifting platform with the chassis being "rigid" at any height position " connected is. As a result of the use of a cable construction, this known assembly scaffold has the additional advantage of a light construction. On the other hand, the height adjustment of the assembly scaffolding requires a certain effort, due to the special rope leadership, even though the pulley effect achieved means that this known lifting platform can be adjusted in height very easily even with relatively low drive power at high loads. Finally, it has been found in practice that the transport of this assembly scaffold, for example when changing the place of use, is relatively cumbersome. Accordingly, the frame with the supports arranged thereon for the transport and the lifting platform are to be moved to or from the loading platform of a transporter or the like, with the assembly scaffolding being secured against slipping during transport by additional means , often time-consuming measures are essential.

Based on the assembly scaffold according to EP 0 219 883 B1, the object of the invention is to further develop the known device in such a way that, while maintaining high stability and lightweight construction, improved handling for the height adjustment of the lifting platform and the transport of the assembly scaffold overall achieved and at the same time operational and functional safety is increased.

This object is achieved according to the invention by the features specified in the claims, in particular in claims 1, 3, 7, 19, 22, 27, 31, 40, 45 and 56.

Improved handling for the height adjustment of the lifting platform can be achieved by the characterizing features of claim 1 according to the invention, the meaning of this proposal being the rope guidance of the individual lifting ropes described. Due to the multiple deflection according to the invention of the individual hoisting ropes on each support, a bottle is added, whereby the height of the lifting platform can be easily changed even under high loads. This is all the more so since in the construction according to the invention a total of three rope sections of each lifting rope pull up and two rope sections down. As a result, an even distribution of force on each individual support and thus a favorable introduction of force as a whole can be achieved. The diagonally extending hoisting ropes according to the measure according to claim 2 form a for the assembly scaffold additional stabilization and at the same time prevent access to the assembly scaffolding under the lift.

The measures according to claims 3 to 18 lead to a rope drum for the assembly scaffold according to the invention, and also independently of the measures according to claims 1 and 2, which work particularly efficiently and above all functionally reliably. According to the invention, the cable drum is arranged approximately parallel to the transverse or longitudinal sides of the mounting frame and is equipped with two roller bodies which can be driven by a continuous shaft and each take up two lifting cables connected to one another to form a common cable. As a result, a synchronous and uniform winding and unwinding of the hoisting ropes is achieved over the entire range of the height adjustment of the lifting platform. The arrangement of a drive between the two roller bodies of the cable drum in accordance with the features of claim 6 has the advantage of direct, moreover, uniform force transmission, which ultimately results in improved drive performance. The measures according to claims 7 to 19 are also of great importance for a functionally reliable winding and unwinding of the hoisting ropes on the rope drum or on its two roller bodies. On the one hand, each roller body is provided on the outer circumference with receiving grooves for the hoisting rope winding so that the hoisting ropes and which are each arranged from ^'two hoisting cables interconnected ropes and unver- displaceably received by corresponding roller bodies provided lungs. On the other hand, each roller body is surrounded by an axially movable pressure shell for the lifting cables, so that jumping out or the like of individual lifting cable windings from the corresponding receiving grooves of the roller bodies is prevented. Even in the event that the lifting ropes are not loaded at all, such as, for example, during the transportation of the assembly scaffold, the lifting ropes remain securely in the receiving grooves of the roller bodies. Structural details with regard to the guide element according to the invention, which causes the pressure shell to move axially as a function of the rotational position of the cable drum or the corresponding roller body, are described in claims 8 to 12. Constructive configurations with regard to the pressure elements of the invention The respective pressure shell, which constantly exerts a radial pressure in the direction of the roller body on the hoist ropes, preferably in the area of the first hoist rope winding, and at the same time moves axially back and forth smoothly with the latter due to the axial movement of the respective pressure shell forced by the guide element are described in claims 13 to 17. To simplify handling during assembly or maintenance, the pressure shell is designed in a longitudinally divided manner.

The design of the supports according to the invention as a polygonal profile, in particular as a square profile tube, according to claims 19 and 20 is of not insignificant importance for the stability of the assembly scaffold, since possible torsion of the supports that occurs under high loads and raised lifting platform can lead to low torsion and thus instability can be largely suppressed. Instead of polygonal profile tubes, support profiles that are equivalent in terms of torsional and buckling stiffness, such as e.g. I-profile bars or the like., Are used.

The inventive adaptation of the diameter of the deflection rollers to the overall width of the supports in accordance with the feature of claim 21 has the advantage that the lifting cables are guided in close proximity to the supports without directly touching them. In this way, an extremely compact construction of the support with the associated lifting rope is achieved, while largely avoiding the additional torsional forces or moments of force acting on the respective support. A particularly favorable distribution of the forces, which are caused on the one hand by the dead weight of the lifting platform and on the other hand by further weight loads due to the lifting and lowering of personnel and auxiliary equipment or the like, can be carried out on the individual supports within the assembly frame moreover by the arrangement according to the invention of the individual deflecting rollers with respect to one another and to achieve this on the individual components of the entire assembly frame in accordance with the measures of claims 22 to 26. Of particular importance for Such a balanced balance of forces within the assembly scaffold according to the invention is the pivoting of the axis of rotation of the sixth deflection roller on its side, since the diagonally running cable sections of the lifting cables can be adapted to the respective height adjustment of the lifting platform. Overall, in the construction according to the invention always three corner supports of the assembly scaffold cooperate, which in turn are in engagement with the respective adjacent three corner support supports of the assembly scaffold, etc. Occurring forces or As a result, moments of force are not absorbed by a single support, but rather by all four supports of the assembly scaffold in cooperation. In this way, on the one hand, the stability of the assembly scaffold can be increased even further, and on the other hand, the effort in handling it significantly reduce this assembly scaffold during the height adjustment.

Through the measures of claims 27 to 30, both the guiding accuracy and the ease of movement of the lifting platform when it is displaced along the respective support are further improved with structurally little effort. In addition, since this design prevents the lift from tilting on one or more of the supports from the outset, its overall height adjustment is extremely smooth, even with one-sided loading.

Furthermore, the operational safety of the assembly scaffold according to the invention is increased in that the lifting platform is provided with braking devices corresponding to the features according to claims 31 to 39, and also independently of the measures according to the preceding claims. Since, in the context of the invention, each support is assigned a braking device which automatically and immediately triggers when the corresponding lifting rope is torn, the lifting platform can be kept at the current height at any time. The design details according to the invention, in particular the coupling of the spring-loaded brake shoes with the lifting cable guided over the so-called first deflection roller, ensure that the brake bake when the hoist rope breaks, ie when the rope tension ceases, because of the counteracting spring force and last but not least because of the weight of the lift, they reliably engage with the respective support.

In an alternative embodiment to the supports proposed in EP 0 219 883 B1, which are articulated on the frame and can be folded approximately into the plane of the same for transport purposes, the frame is provided with support sections in accordance with the features of claims 56 to 64, the upper ends of which are each connected to the lower end of each support via a hinged joint or the like. In this case, each support which is hinged to the corresponding support section can be locked in its functional position in the extension of the support section without play and can be folded into the plane of the frame for transport purposes just as easily and quickly after releasing the locking. The structural measures for the folding joint according to the invention, by means of which play-free locking of the respective support on the assigned support section is ensured, are of great importance for a functionally reliable assembly scaffold. Last but not least, this leads to increased safety for the personnel moving on the lifting platform of the assembly scaffold, in particular during vertical movements of the lifting platform, but also in its raised position. In addition, according to a further alternative embodiment, the supports according to the invention can be inserted into tubular receiving devices of the frame in accordance with the measures according to claims 40 to 44 and, in turn, can be removed from them for transport purposes. In terms of device technology, the mechanism according to the invention for releasing the press fit between the respective support and the tubular receiving device is of particular interest. Because of the eccentric provided, the respective support with its conically tapering end is simply and quickly pressed out of the tubular receiving device or from the mast quiver when it is rotated by means of a dismantling lever. In this way, the assembly scaffold according to the invention can both be assembled without difficulty and, in turn, conveniently dismantled to form a compact transport unit. Finally, it is still within the scope of the invention in accordance with the features of claims 45 to 55, and also independently of the measures according to the preceding claims, to design the assembly scaffolding according to the invention quickly and without any major conversion effort into a single-axle trailer or to repurpose. The transport of the assembly scaffold according to the invention from one to the subsequent place of use is considerably simplified since additional loading and unloading as well as securing the assembly scaffold on the loading platform of a transport vehicle, which usually takes a lot of time, or Like. against slipping. Accordingly, a preferably single-axle trailer undercarriage can be moved underneath the mounting frame and can be coupled to it in a captive manner by means of the locks according to the invention. In addition, according to the invention, support feet are provided in the corner regions of the frame, which are at least extendable downward beyond the maximum height and width dimensions of the single-axle trailer chassis and can be moved out laterally from the frame. In addition, the support feet are each provided with their own impeller, so that the assembly scaffolding according to the invention remains movable even after the single-axle trailer chassis has been removed. Not least due to the re¬ sulting therefrom improved handling ^• mounting frame according to the invention is used niversell.

Further features, advantages and details of the invention result from the following description of some preferred embodiments of the invention and from the drawing. Here show:

1 - 3 show a side, rear and bottom view of an embodiment of an assembly scaffold designed according to the invention in the retracted state;

Fig. 4 u. 5 is a side and rear view of another

Embodiment of an inventive assembly scaffold in the extended state in a reduced view; 6 shows a perspective, partially broken away schematic view of the assembly scaffold with a rope guide according to the invention for an individual hoisting rope;

Fig. 7 u. 8 shows a bottom and side view of a lifting platform according to the invention of the assembly scaffold according to FIG. 1 in an enlarged illustration;

9 shows an enlargement of the corner area of a lifting platform designed according to the invention in accordance with section IX in FIG. 7;

10 shows a partial central longitudinal section through an inventive rope drum in the area of a roller body according to line X-X in FIG. 7 in an enlarged representation;

11 shows a partial cross section through a rope drum designed according to the invention in the region of a roller body according to line XI-XI in FIG. 10;

FIG. 12 shows a side view of a guide element according to FIG. 10 designed according to the invention in an enlarged view;

13 shows a central longitudinal section through a support designed according to the invention in the corner region of the lifting platform of the assembly scaffold according to line XIII-XIII in FIG. 9 in an enlarged representation;

14 shows a partial cross section through a support designed according to the invention along the line XIV-XIV in FIG. 13;

15 shows a cross section through an inventive support according to line XV-XV in FIG. 13; 16 + 17 are a side and top view of a frame of the assembly scaffold according to FIG. 1 designed according to the invention in an enlarged illustration;

Fig. 18 is a partial middle longitudinal section through an inventive and into a

Support device inserted support in the corner area of the frame of the assembly scaffold according to line XVIII-XVIII in FIG. 17 in an enlarged view;

19 shows a schematic top view of a support designed according to the invention along the line XIX-XIX in FIG. 18;

20 + 21 are a schematic side and bottom view of an egg axle suspension chassis designed according to the invention according to FIG. 1;

22 shows a central longitudinal section through a latching device designed according to the invention in accordance with detail XXII in FIG. 20 in an enlarged representation together with a locked frame of the assembly frame;

23 shows a top view of an articulated fork designed according to the invention;

24 shows a central longitudinal section through an articulated fork designed according to the invention according to line XXIV-XXIV in FIG. 23;

25 shows a top view of a joint pin designed according to the invention; and

26 shows a central longitudinal section through a hinge pin designed according to the invention along line XXVI-XXVI in FIG. 25. 1 to 5 comprises a frame 1 which is rectangular in plan and a lifting platform 2 having the same shape and having a platform 3. The lifting platform 2 together with the platform 3 is upright on the rack 1 and in the corner areas 4 arranged supports 5 infinitely adjustable in height by lifting means, ie can be raised and lowered as required. The platform 3 is surrounded by a railing 6, which is connected, for example, by a plug connection to the lifting platform 2, the design of which can be of very different types (cf. FIGS. 1, 2; 4, 5). To support the assembly scaffold on the floor surface, 4 support feet 7 are arranged on the frame 1 in the corner areas, which can be extended by means of locking spindles 8 of conventional construction. Finally, a single-axle trailer chassis 9 is provided for transporting the assembly scaffold, which may be moved under the frame 1 of the assembly scaffold and then releasably connected to it and vice versa. The lifting means have a cable winding device arranged on the lifting platform 2 for the synchronous winding and unwinding of lifting cables 10, with each lifting cable 10 according to FIGS. 4 and 5 on a transverse side 11 and on a longitudinal side 12 of the assembly frame crosses another hoisting rope diagonally across the surface.

The support feet 7 according to FIGS. 1 and 4 in the corner regions 4 of the frame 1 can be extended at least beyond the maximum height or width dimensions of the single-axle trailer chassis 9 or can be moved out laterally from the frame 1. While the support feet 7 are extended in the vertical direction by extending the locking spindles 8, the support feet 7 are displaced in the horizontal direction from the plane of the long sides 12 of the assembly frame, for example by tubular support parts rigidly connected to each support foot 7 ( not shown) reached. These carrier parts are longitudinally displaceably received in corresponding receiving parts 13 (cf. FIGS. 16 and 22), each of which is on the transverse sides 11 of the frame 1 above its underside 14 are arranged so that these receiving parts 13 do not protrude beyond the underside 14 of the frame 1 and thus do not influence or impede the underside of the frame 1 by the single-axle trailer chassis 9.

As can also be seen from FIGS. 1 and 4, the

Support feet 7 each inclined from the frame 1 towards the outside in the vertical direction. Such an inclined position of the support feet 7 ensures a play-free support of the assembly scaffold as a whole, especially on an uneven floor surface. Furthermore, the support feet 7 are each provided with an impeller 15, so that the mounting frame itself remains movable after removal of the single-axle trailer chassis 9. However, in order to be able to secure the assembly scaffold against rolling after removal of the single-axle trailer chassis 9, the support feet 7 and the locking spindles 8 can each be individually extended at least until each impeller 15 is lifted off the ground. In addition, the running wheels 15 are arranged on the corresponding support feet 7 in such a way that the running wheels are in contact with the ground through the single-axle trailer running gear 9 while the assembly scaffolding is being driven under. In this way, position corrections between the single-axle trailer chassis 9 and the assembly scaffold can easily be carried out without difficulty due to its movability even during the coupling process.

According to FIG. 6, two hoisting ropes 10 are connected to one another to form a common rope 16 and guided over a common rope drum 17. In detail, the cable guidance for each lifting cable 10 results from FIG. 6. Thereafter, each lifting cable 10 runs, starting from the cable drum 17, over a first deflection roller 18 arranged on the lifting platform 2, over a second, at the upper end 19 of the assigned support 5 arranged deflection roller 20 and from there via a third again arranged on the lifting platform 2 deflection roller 21. From this third deflection pulley 21, each hoist rope 10 via a fourth deflection roller 22, also arranged at the upper end 19 of the assigned support 5 and then via a fifth, at the lower end 23 of the assigned support 5 or on the frame 1 arranged deflection roller 24 passed. From this fifth deflection pulley 24, the lifting ropes 10 each run diagonally across the transverse side 11 along the assembly frame to a sixth deflection pulley 25 arranged on the lifting platform 2 in the area of the adjacent support 5 '. In the end, each lifting cable 25 becomes surface diagonal along the longitudinal side 12 along the assembly frame for articulating each lifting rope 10 at the lower end 23 of the support 5 "adjacent to the support 5 'or in the area there directly on the frame 1. The cable guide of the lifting cable 10 assigned to the support 5" corresponds to the rope guide described above. The cable routing of the remaining two hoisting ropes 10, which are assigned to the support 5 * or the fourth support 5, not shown in FIG. 6, also corresponds to the previously described cable guide, which is, however, reversed.

The supports 5, 5 ', 5 "are designed as polygonal profiles, in particular square tube profiles, the square tube profiles preferably having a square shape. The width of the side walls of the supports 5, 5', 5" corresponds approximately the diameter of the deflection rollers 18, 20, 21, 22, 24, 25, so that the lifting cables 10 are in close proximity to the supports 5, but do not touch them. This also has the advantage that the deflecting rollers 18, 20, 21, 22, 24, 25 can be arranged on different side walls 27 of the supports 5. The first, second and fourth deflecting rollers 18, 20, 22 are each rotatably received by an axis running approximately parallel to the transverse sides 11 of the assembly frame. In addition, the second and fourth deflecting rollers 20, 22 are arranged at the upper end 19 of the associated support 5, but on opposite side walls 27 of the supports 5. Furthermore, the third and fifth deflecting rollers 21, 24 are each rotatably received by an axis running approximately parallel to the longitudinal sides 12 of the assembly frame. Here, the fifth deflection roller 24 is arranged at the lower end 23 of the associated support 5 on a side wall 27 of the support 5 facing away from the third deflection roller 21. 7, the axis of rotation 28 of the sixth deflection roller 25 is in turn rotatably supported. In this way, a corresponding adaptation of the surface-diagonally running cable sections of the lifting cables 10 to the respective height adjustment of the lifting platform 2 is achieved. Thus, the axis of rotation 28 of the sixth deflection roller 25 is received by a U-shaped support 29 which is rotatably connected to the lifting platform 2. The axis of rotation 28 of the sixth deflection roller 25 is supported on the two longitudinal legs 30 of the U-shaped support 29 at the ends. The cross leg 31 of the U-shaped support 29 connecting the two longitudinal legs 30 of the U-shaped support 29 is firmly connected to an approximately vertically projecting axis 32, which in turn is attached to the lifting platform 2 so as to be rotatable.

7 and 8, the lifting platform 2 of the assembly frame with the walk-on platform 3 is shown. The platform consists of individual plates 33 made of aluminum or the like, which are connected to one another, for example by welding, and whose surface is preferably additionally profiled. A cable drum 17 is arranged below the platform 3 on the lifting platform, which runs approximately parallel to the transverse sides 11 of the assembly frame and is rotatably mounted on the inner longitudinal sides 12 of the assembly frame. The Seiltrom¬ mel 17 consists of two individual roller bodies 34 which each receive a rope 16 connecting two hoisting ropes 10 together. The two roller bodies 34 are driven synchronously via a common shaft 35. A motor 36, for example an electric motor, is provided as the actuating element for driving the cable drum 17, which for performance reasons is preferably arranged between the mutually facing end faces 37 of the two roller bodies 34. Alternatively, a manually operable crank, which is then also arranged on the lifting platform 2, can also be provided.

The one roller body 34 of the cable drum 17 shown in FIGS. 10 and 11 is provided on the outer circumference 38 with receiving grooves 39 for the windings of the lifting cables 10. At the same time the roller body 34 is surrounded by an axially movable pressure shell 40, by means of which the windings of the hoisting ropes 10 are immovably held. The embodiment of the pressure shell 40 according to FIGS. 10 and 11 is formed in a longitudinally divided manner, the two partial shells 41 and 42 having one

Flange screw connection 43 are detachably connected together. This embodiment has the advantage of a considerably simplified assembly and maintenance of the pressure shell 40.

The pressure shell 40 has on its inner circumference 44 at least one guide element 45 which is used for the axial movement of the

The pressure shell 40 is in contact with the outer circumference 38 of the respective roller body 34. In particular, the guide element 45 projects into at least one receiving groove 39 of the roller body 34. 12, the guide element 45 is designed as a guide wire 46. The guide wire 46 has, on the one hand, a central, circular arc-like leg 47, which partially projects into a receiving groove 39. On the other hand, the guide wire 46 consists of two legs 48 on the end side and opposite the curvature of one leg 47. The two legs 48 are provided for fastening to the inner circumference 44 of the pressure shell 40, which are preferably inserted into corresponding bores under prestress be stuck. So that the guide wire 46 or its leg 47 rests positively in the receiving groove 39 of the roller body 34, its diameter corresponds approximately to that of the hoisting ropes 10 and also approximately to the diameter of the receiving grooves 39. For the positive engagement of the guide wire 46 the radius of curvature of its leg 47 is approximately adapted to that of the outer circumference 38 of the roller body 34. In practice, it has proven to be advantageous to dimension the circular arc of one leg 47 of the guide wire 46 at approximately 90 °, since on the one hand the friction of the guide wire 46 in the receiving groove 39 is kept relatively small and on the other hand one secure axial driving of the pressure shell 40 is guaranteed. 10 shows that the pressure shell 40 is provided on its inner circumference 44 with a total of 4 pressure elements 49. The pressure elements 49 are in line or point contact with the two hoisting ropes 10 in the area of the first hoisting rope winding, as in this case. In this way, the two hoisting ropes 10 are each held captively in the corresponding receiving groove 39 of the roller body 34. Rolling bearings 50 are preferably provided as pressure elements 49, the axes of rotation 51 of which lie essentially parallel to the shaft 35 of the cable drum 17. Their outer bearing shells 52 lie here in punctiform fashion on the two hoisting ropes 10 in the area of the first hoisting rope winding. Two of the four roller bearings 50 are preferably arranged directly in the area of the first contact point 53 of the respective lifting rope 10 and receiving groove 39 of the roller body 34 (cf. in particular FIG. 11). Of the four roller bearings 50, two roller bearings 50 - here the upper one to the lower one - are arranged offset from one another both in the circumferential and in the axial direction of the pressure shell 40. Accordingly, the two, ie in each case the upper to the lower roller bearing 50, are on the one hand about 180 ° on the circumference of the pressure shell 40 and, on the other hand, according to the inclination of the receiving grooves 39 by about half a winding pitch of the lifting cables 10 in the axial direction of the pressure shell 40 ¬ offset from each other. In order to keep the frictional resistance as low as possible with a large pressure force, the pressure elements 49 in the present embodiment of the pressure shell are designed as radial ball bearings. However, it is also conceivable to instead of each of the two, ie here the upper to the lower, roller bearings 50 only attach a single roller bearing to the pressure shell 40, the inner bearing shells of which then press the hoisting rope 10 into the associated receiving groove 39. Finally, it is equally possible to design the pressure elements 49 as ribs or the like which protrude on the inner circumference 44 of the pressure shell 40 and are adapted to the slope of the receiving groove 39. As shown in FIGS. 13 and 15, the lifting platform 2 is provided in the corner regions 4 with guide sleeves 54, which each enclose a support 5 so as to be longitudinally displaceable. In each guide sleeve 54, two guide rollers 55 associated with at least two opposite side walls 27 of the support 5 are rotatably mounted to reduce the frictional resistance when adjusting the height of the lifting platform. The guide rollers 55, whose length essentially corresponds to the width of the side walls 27 of the supports, are mounted in the region of the guide sleeves 54 facing the frame 1, the axes of rotation 56 of which extend approximately parallel to the transverse sides 11 of the assembly frame. To simplify the construction, the guide sleeves 54 according to FIG. 15 are part of the lifting platform 2, since the axes of rotation 56 of the guide rollers 55 are embedded in the longitudinal sides 12 of the lifting platform 2, for example.

In addition, the lifting platform 2 is provided with braking devices 57, as shown in FIGS. 13 and 14. These are each assigned to a support 5 and trigger automatically when the corresponding hoisting rope 10 breaks. A height adjustment of the lift 2 is therefore excluded. Each brake device 57 comprises a two-armed bracket 58 received in the corresponding guide sleeve 54. The bracket 58 can be tilted and also spring-loaded about an axis 60 which is approximately parallel to the axis of rotation 59 of the first deflecting roller 18. One arm 61 of the holder 58 is provided with a braking element 62, while the other arm of the holder 58 carries the first deflection roller 18. In addition, two compression springs 64 are articulated on the arm 63, which are supported on the guide sleeve 54. The spring force of the two compression springs 64 is chosen to be as large as the rope tension of the lifting rope 10 guided over the first deflection roller 18. As a result, the spring tension and the rope tension cancel each other out with an intact lifting rope 10. Furthermore, one arm 61 of the holder 58 grips the respective support 5 in a fork-shaped manner with two side plates 65, which are rigidly connected to one another in the region of the other arm 63 carrying the first deflecting roller 18, for example via a sheet metal 66. Instead of the compression springs 64 engaging on the arm 63, it is just as conceivable for the arm 61 of the Bracket 58 to act tension springs.

The brake element 62 shown in FIG. 13 is two brake shoes 67 arranged on opposite side walls 27 of the corresponding support 5. The brake shoes 67 are rotatably received at their one end 68 by one arm 61 of the holder 58. With their other end 59, which tapers in a wedge shape, the brake shoes 67 are held between a stationary stop 70 and the respectively adjacent side wall 27 of the support 5. When the hoisting rope 10 breaks, the spring-loaded holder 58 is immediately tilted about its axis of rotation 60, so that each brake shoe 67 is automatically longitudinally displaced upwards in the vertical direction. Due to the force generated by the compression springs 64, the brake shoes are wedged between the fixed stop 70 and the adjacent side wall 27 of the support 5. The dead weight of the lifting platform 2 further increases this wedge effect. In order not to negatively influence the smoothness of the assembly scaffold during the height adjustment, the two brake shoes 67 on the other arm 63 of the holder 58 can be rotated by means of two axes of rotation 71 running approximately parallel to their axis of rotation 60 and with play between them Fixed stop 70 and the respective side wall 27 of the support 5 articulated. In addition, the fixed stop 70 is designed as a pin or the like, which, owing to its shape or rotatable outer shell, hardly opposes any frictional resistance to the respective brake shoe 67.

The frame 1 shown in FIGS. 16 and 17 has tubular receiving devices 72 in the corner regions 4, each of which has a conically narrowing opening 73 according to FIGS. 18 and 19. The tapered opening 73 serves in each case to accommodate and support the supports 5 without play, which are formed at their lower end 23 with a cone 74 which also tapers and is provided for releasable connection to the frame 1. As a result, the cone 74 of each support 5 can be inserted into the conical opening 73 of the receiving device 72 with a precise fit. Each receiving device 72 is also provided with one in the opening 13 provided eccentric 75, which can be rotated about an axis of rotation 77 approximately perpendicular to the longitudinal axis 76 of each receiving device 72. When actuated, ie when rotating, the eccentric 75 acts against the end face 78 of the cone 74 and finally presses the cone

74 with the support 5 out of the receiving device 72. In this way, the press fit entered between the support 5 and the frame 1 can be released easily and quickly. To simplify production, the eccentric 75 is placed on a bolt 79 or the like which is pushed through from the outside by the receiving device 72. In order to keep the structural effort of such a release mechanism as low as possible, it falls with the eccentric

75 provided bolts 79 together with the axis of rotation 80 of the fifth deflection roller 24. To actuate the eccentric 15, i.e. to rotate it, a dismantling lever 81 or the like is finally provided, which passes through the bolt 79 or the axis of rotation 80.

In order to detachably couple the single-axle trailer trolley 9 shown in FIGS. 1 to 5 after driving under the assembly scaffold, ie the underside 14 of the frame 1, the one-axle trailer trolley 9 and the frame 1 interact with one another Receiving devices 82 and a locking device 83 arranged according to FIGS. 20 to 22. Provided as receiving devices 82 on the single-axle trailer chassis 9 are two axially fastening tabs 84 spaced apart from one another, which extend approximately horizontally and are rigidly connected to the wheel axle 85. These axis fastening tabs 84 also each have a groove 87 facing away from the trailer coupling 86, into which a vertical stop bolt 88, which is firmly connected to the frame 1, can be inserted and fixed. The stop bolts 88 are each arranged about half the length of the long side 12 of the frame 1 on the underside 14 thereof. In order to fix them in the vertical direction or to reach under the respective axle fastening sheet 84 with almost no play, these stop bolts 88 are additionally provided with an annular stop surface or thickening 89 (cf. also FIG. 16). Finally, the single-axle trailer 9 is also vertically displaceable Locking lever 90 is equipped as a locking device 83, which passes through a receiving pocket 92 or the like attached to the frame 91 of the single-axle trailer chassis 9. At the same time, a fastening tongue 93 with a vertical through-bore 94 is welded to the frame 1 of the assembly frame in the area of at least one of the two transverse sides 11. After insertion of the fastening tongue 93 into the receiving pocket 92, the latching lever 90 engages through the receiving pocket 92 and fastening tongue 93, as a result of which the frame 1 of the mounting frame is ultimately captively connected to the single-axle trailer chassis 9. To secure the locking lever 90 is designed by means of a mechanical locking device 95 or the like, so that it is held captively, for example, by a compression spring 96 in the bore 94 of the fastening tongue 93.

To further improve the manageability of the assembly scaffold according to the invention, the lifting means can of course be actuated from the lifting platform 2. A load limiting device is also helpful insofar as the actuation of the lifting means is blocked when a maximum load acting on the lifting platform 2 is exceeded. Such a load limiting device could, for example, respond to a specific rope tension value of a hoisting rope 10.

23-26, a folding joint 99 is shown which connects the upper end 98 of a support section 97 which is arranged upright on the frame 1 and is not shown in more detail and the lower end 23 of the associated support 5. The support 5 hinged to the support section 97 in this way can be locked in its functional position in the extension of the support section 97 without play. The folding joint 99 is composed of the joint fork 100 and the joint pin 101, which are rotatably coupled to one another via the common axis of rotation 102 in the form of a bolt or the like. The ends 103, 104 of the joint fork 100 or joint pin 101 facing away from the axis of rotation are designed as plug-in socket connections or the like and into the upper end 98 of the support section 97 or the lower end 23 of the associated support 5 and vice versa can be inserted without play. After insertion, the ends 103, 104 of the joint fork 100 or joint pin 101 are fastened to the upper end 98 of the support section 97 or to the lower end 23 of the associated support 5 and vice versa by welding, riveting, screwing or the like. The joint fork 100 of the folding joint 99 is approximately U-shaped and rotatably receives the joint pin 101 of the folding joint 99 via its two longitudinal legs 105. The articulated fork 100 and the pivot pin 101 of the folding joint 99 can be locked with one another without play via a spring-preloaded longitudinal bolt 106 in the functional position of the corresponding support 5. The longitudinal bolt 106, which is only indicated schematically in FIGS. 25 and 26, is received, like the compression spring 107, by the longitudinal bore 108 of the pivot pin 101 and is arranged to be longitudinally displaceable therein. The maximum longitudinal displacement of the longitudinal pin 106 out of the longitudinal bore 108 is limited by safety measures, not shown, so that the longitudinal pin 106 cannot be lost. The longitudinal bolt 106 spring-loaded in this way in the pivot pin 101 of the folding joint 99 in the direction of the joint fork 100 can be received for locking with the U-shaped joint fork 100 in a longitudinal bore 109 of the transverse leg 110 of the joint fork 100 carrying the two longitudinal legs 105.

The articulated fork 100 and the articulated pin 101 of the hinged articulation 99 can be separated from one another again by means of an end locking element from the latching position for folding the supports 5, for example for transport purposes of the entire assembly scaffold. The end locking element can be actuated from the outside and is operatively connected to the spring-loaded longitudinal bolt 106. The bolt 112 is provided as the final locking element, which acts on the end face 111 of the longitudinal bolt 106 and is designed to be displaceable against the spring force. For the purpose of actuation, the bolt 112 is mechanically coupled to a lever, button or the like (not shown in more detail) which passes through at least one side wall 27 of the associated support 5 or the support section 97 and can be actuated from the outside. Each support section 97 is provided with a length which corresponds approximately to the height of the railing 6 of the mounting frame surrounding the platform 3, which increases the maximum lifting height of the lifting platform 2 of the mounting frame and at the same time ensures that the supports 5 are on the frame 1 can be folded down. The assembly scaffold according to the invention thus has a compact design, which is required in particular for the transport or storage purposes of the assembly scaffold. In order to further improve the compact construction of the assembly scaffold, two supports 5, which are arranged adjacent to one another, in particular on the longitudinal side 12 of the assembly scaffold, can be folded over in pairs, the support sections 97 of these supports 5 being of different lengths are. As a result, the two supports 5 can lie one above the other.

All features disclosed in the application documents are claimed as essential to the invention, insofar as they are new or in combination with respect to the prior art.

Claims

2.2.Assembly scaffold with block and tackle 1. Box-shaped assembly scaffold with a lifting platform, the lengthways upright on a frame arranged supports can be continuously adjusted by lifting means, which comprise a cable winding device arranged on the lifting platform for synchronous winding and unwinding of lifting cables or the like, wherein two lifting cables each form a common one men rope connected to each other and are guided by a common rope drum, characterized in that the lifting ropes (10) each starting from the rope drum (17) via a first deflection roller (18) arranged on the lifting platform (2), via a second deflection roller (20) arranged at the upper end (19) of the associated support (5), via a third deflection roller (2) arranged deflection roller (21), via a fourth, again at the upper end (19) of the associated support (5) arranged deflection roller (22), via a fifth at the lower end (23) of the assigned support (5) or on the frame (1) arranged deflection roller (24), diagonally across a transverse side (11) along the assembly frame via a sixth one arranged on the lifting platform (2) in the area of the adjacent support (5 ') 25th Deflection roller (25) and diagonally across the surface on a longitudinal side along the mounting frame for anchoring at the lower end (23) of the support (5 ') adjacent to the support (5') or on the frame (1). 2. Mounting scaffold according to claim 1, so that each lifting rope (10) crosses diagonally across the surface on a transverse and longitudinal side (11, 12) of the mounting scaffold with a further lifting rope (10). 3. Assembly scaffold, in particular according to at least one of the preceding claims, characterized in that the cable drum (17) approximately parallel to the transverse or longitudinal sides (11 or 12) of the assembly scaffold, in particular to the transverse sides (11) extending on the lifting platform ( 2) is rotatably arranged below a platform (3). 4. Mounting scaffold according to at least one of the preceding claims, that the cable drum (17) consists of two individual roller bodies (34) receiving a rope (16) that connects two hoisting ropes (10) to one another. 5. Assembly stand according to claim 4, d a d u r c h g e k e n n z e i c h n e t that the roller body (34) via a common shaft (35) can be driven. 6. Mounting scaffold according to at least one of claims 4 and 5, characterized in that an actuator (36), in particular a between the mutually facing end faces (37) of the two roller bodies (34) is provided for driving the cable drum (17). 7. Mounting frame, in particular according to at least one of the preceding claims, characterized in that each roller body (34) of the cable drum (17) on the outer circumference (38) with receiving grooves (39) for the hoist rope windings and provided by an axially movable An¬ pressure shell (40) for the hoist rope windings is surrounded. 8. Scaffolding according to claim 7, characterized in that the pressure shell (40) on the inner circumference (44) is provided with at least one guide element (45) which for the axial movement of the pressure shell (40) with the outer circumference (38) of the the respective roller body (34) is in contact, in particular protrudes into at least one receiving groove (39). 9. Mounting scaffold according to claim 8, so that the guide element (45) is formed as a guide wire (46) which partially protrudes from a central, circular arc and into a receiving groove (39) Legs (47) and two ends (48) pointing against the curvature of one leg (47) and intended for attachment to the inner circumference (44) of the pressure shell (40). 10. Mounting scaffold according to claim 9, d a d u r c h g e k e n n z e i c h n e that the guide wire (46) has a diameter which corresponds approximately to that of the lifting cables (10). 11. Mounting frame according to at least one of claims 9 and 10, characterized in that the radius of curvature of the one leg (47) of the guide wire (46) corresponds approximately to that of the outer circumference (38) of the roller body (34). 2S " 12. Scaffolding according to at least one of claims 9 to 11, so that the circular arc of one leg (47) of the guide wire (46) extends over approximately 90 °. 13. Mounting scaffold according to at least one of claims 7 to 12, characterized in that the pressure shell (40) on the inner circumference (44) is provided with at least two pressure elements (49) which with the two lifting cables (10) in the area of the first The hoist rope winding is in contact in the form of a point or line in such a way that the two hoist ropes (10) are each held captively in the corresponding receiving groove (39) of the roller body (34). 14. Mounting frame according to at least one of claims 7 to 13, characterized in that at least two roller bearings (50) or the like are provided as pressure elements (49), the axes of rotation (51) of which are substantially parallel to the shaft (35) of the cable drum (17). lie and their outer bearing shells (52) rest point-like on the two hoist ropes (10) in the area of at least the first hoist rope winding, preferably in the area of the first point of contact of the respective hoist rope (10) and receiving groove (39) of the roller body (34) . 15. Mounting scaffold according to claim 14, characterized in that four roller bearings (50) or the like are provided as pressure elements (49), two roller bearings (50) being offset from one another in the circumferential and axial directions of the pressure shell (40). 16. Mounting scaffold according to claim 15, d a d u r c h g e k e n n z e i c h n t that the two roller bearings (50) in particular about 180 ° on the circumference of the pressure shell (40) and according to the inclination of the receiving grooves by about half Winding of the lifting ropes (10) are arranged offset to one another in the axial direction of the pressure shell (40). 17. Mounting frame according to at least one of claims 13 to 16, that the pressure elements (49) are designed as radial ball bearings. 18. Mounting scaffold according to at least one of the preceding claims, that the pressure shell (40) is formed longitudinally divided, the two partial shells (41, 42) being releasably connected to one another. 19. Scaffolding, in particular according to at least one of the preceding claims, characterized in that the supports (5) are designed as polygonal profiles, in particular square tubular profiles, and at their lower ends (23) with a tapered, for releasable connection to the frame (1) provided cone (74) are seen. 20. Mounting scaffold according to claim 19, so that the square profiles are square. 21. Mounting scaffold according to at least one of the preceding claims, characterized in that the diameter of the deflecting rollers (18, 20, 21, 22, 24, 25) corresponds approximately to the width of the side walls (27) of the supports (5). 22. Assembly scaffold, in particular according to at least one of the preceding claims, characterized in that the first, second and fourth deflecting roller (18, 20, 22) are each rotatably received from an axis running approximately parallel to the transverse sides (11) of the assembly scaffold, the second and fourth deflecting roller (20, 22) are arranged at the upper end (19) of the assigned support (5) on opposite side walls (27) of the support (5). 23. Mounting frame according to at least one of the preceding claims, characterized in that the third and fifth deflecting roller (21, 24) are each rotatably received by an axis running approximately parallel to the longitudinal sides (12) of the mounting frame, the fifth deflecting roller (24 ) is arranged at the lower end (23) of the associated support (5) on a side wall (27) of the support (5) facing away from the third deflection roller (21). 24. Mounting scaffold according to at least one of the preceding claims, characterized in that the axis of rotation (28) of the sixth deflection roller (25) in turn for the corresponding adaptation of the diagonally extending cable sections of the lifting cables (10) to the respective height adjustment of the lifting platform (2) is rotatably mounted. 25. Mounting scaffold according to claim 24, characterized in that the axis of rotation (28) of the sixth deflection roller (25) of a with the lifting platform (2) rotatably connected, U-shaped carrier (29) is received. Z. 26. Mounting scaffold according to claim 25, characterized in that the two longitudinal legs (30) of the U-shaped support (29) receive the axis of rotation (28) of the sixth deflection roller (25) at the end and the cross leg (31) of the U-shaped support (29) with an approximately vertically projecting axis (32) which is rotatably mounted on the lift (2). 27. Scaffolding, in particular according to at least one of the preceding claims, characterized in that the lifting platform (2) is provided with guide sleeves (54), each of which supports a support (5) so as to be longitudinally displaceable, with at least two opposite ones in each guide sleeve (54) Side walls (27) of the support (5) associated guide rollers (55) are rotatably mounted. 28. Assembly scaffold according to claim 27, so that the guide rollers (55) are arranged in the lower region of the guide sleeve (54) and their axes of rotation (56) run approximately parallel to the transverse sides (11) of the assembly scaffold. 29. Mounting scaffold according to at least one of claims 27 and 28, so that the guide rollers (55) correspond in length essentially to the width of the side walls (27) of the supports (5). 30. Assembly frame according to at least one of claims 27 to 29, characterized in that the guide sleeves (54) are part of the lifting platform (2). 31. Scaffolding, in particular according to at least one of the preceding claims, characterized in that the lifting platform (2) is provided with braking devices (57), each associated with a support (5) and when tearing the corresponding lifting cable (10) to prevent a Height adjustment of the lifting platform (2) can be triggered automatically. 32. Scaffolding according to claim 31, characterized in that each braking device (57) in the corresponding guide sleeve (54) about an axis of rotation (59) of the first deflection roller (18) approximately parallel axis (60) tiltably received, two-armed and spring-loaded Hal - Tension (58) comprises, on one arm (61) at least one braking element (62) and on the other arm (63) the first deflection roller (18) are arranged. 33. Mounting scaffold according to claim 32, so that the spring force acting on the holder (58) can be compensated by the corresponding hoisting rope (10) via the first deflection roller (18). 34. Mounting frame according to at least one of claims 32 and 33, characterized in that on the other, the first deflection roller (18) carrying arm (63) of the holder (58) at least one on the Füh¬ sleeve (54) supported compression spring (64) is articulated. 35. Mounting scaffold according to at least one of claims 31 to 34, characterized in that the one, the braking element (62) having arm (61) of the bracket (58) is formed around the respective support (5) fork-shaped. 3c? 36. Mounting scaffold according to claim 35, characterized in that the holder (58) is formed from two side plates (65) which are rigidly connected to one another in the region of the other arm (63) carrying the first deflecting roller (18) are. 37. Mounting frame according to at least one of claims 31 to 36, characterized in that at least one, preferably two, on opposite side walls (27) of the corresponding support (5) arranged as brake element (62) are provided as brake element (62) with one end (68) rotatably received by one arm (61) of the holder (58) and with its other wedge-shaped end (69) between a fixed stop (70) and the adjacent side wall (27) the support (5) are held. 38. Scaffolding according to claim 37, characterized in that each brake shoe (67) when the hoist rope (10) tears by the spring-loaded bracket (58) is longitudinally displaceable and between the fixed stop (70), in particular a pin or the like, and the adjacent one Side wall (27) of the support (5) can be wedged. 39. Mounting scaffold according to at least one of claims 36 and 37, characterized in that the one arm (61) of the holder (5-8) with two approximately parallel to its axis of rotation (60) and opposite to ge side walls (27) of the support (5) adjacent axes of rotation (71) for the brake shoes (67) is provided. 3 | 40. Assembly frame, in particular according to at least one of the preceding claims, characterized in that the frame (1) has tubular receiving devices (72) each with a conically tapering opening (73) into which the cone (74) at the lower end (23) each support (5) can be inserted without play. 41. Mounting scaffold according to claim 40, characterized in that each receiving device (72) has an eccentric (77) which is arranged in the opening (73) and is rotatable about an axis of rotation (77) approximately perpendicular to the longitudinal axis (76) of the receiving device (72). 75) is provided which cooperates with the end face (78) of the cone (74) in such a way that it can be pressed out of the opening (73) when the eccentric (75) is actuated. 42. Mounting scaffold according to claim 41, so that the eccentric (75) is provided on a bolt (79) or the like which is inserted through the receptacle (72) from the outside. 43. Mounting scaffold according to at least one of claims 41 and 42, so that the pin (79) provided with the eccentric (75) is aligned with the axis of rotation (80) of the fifth deflection roller (24). 44. Mounting scaffold according to at least one of claims 41 to 43, characterized in that the bolt (79) provided with the eccentric (75) in extension of the axis of rotation (80) of the fifth deflection roller (24) has a bolt (79) or axis of rotation (80 ) has transverse disassembly lever (81) or the like. 45. Assembly scaffold, in particular according to at least one of the preceding claims, that the assembly scaffold can be driven under and coupled to by a trailer chassis, preferably by a single-axle trailer chassis (9). 46. Assembly scaffold according to claim 45, so that the single-axle trailer chassis (9) can be coupled to the frame (1) of the assembly scaffold by means of interacting receiving and latching devices (82, 83). 47. Mounting scaffold according to claim 46, characterized in that on the single-axle trailer chassis (9) as receiving devices (82) two spaced, approximately horizontally extending and on the wheel axle (85) or the like (84) are provided, each of which has a groove (87) facing away from the trailer coupling (86), in which a vertical stop bolt (88) which is firmly connected to the frame (1) can be inserted and received. 48. Scaffolding according to claim 47, characterized in that the stop bolts (88) are each arranged approximately at half the length of the longitudinal side (12) of the frame (1) on its underside (14) and an annular stop surface (89) for almost have play-free grip under the corresponding axle mounting bracket (84). 49. Assembly frame according to at least one of claims 46 to 48, characterized in that on the single-axle trailer chassis (9) as a latching device (83) there is provided a vertical latching lever (90), which penetrates a receiving pocket (92) or the like attached to the frame (91), through which a lever (90) on the frame ( 1) the mounting frame (93) which is rigidly arranged in the area of at least one of the two transverse sides (11) and can be inserted into the receiving pocket (92), 50. Mounting scaffold according to claim 49, so that the latching lever (90) is held captively in a bore (94) of the fastening tongue (93) by means of a mechanical locking device or the like, in particular by means of a compression spring (96). 51. Assembly scaffold according to at least one of the preceding claims, characterized in that the frame (1) in its corner regions (4) is equipped with support feet (7) which are at least above the maximum height and width dimensions of the single-axle trailer. chassis (9) extendable and laterally from the frame (1) are designed to be movable. 52. Mounting scaffold according to claim 51, so that the support feet (7) are arranged displaceably on the transverse sides (11) of the frame (1) above its underside (14). 53. Mounting scaffold according to at least one of claims 51 and 52, characterized in that the support feet (7) can be adjusted obliquely to the outside for play-free support from the frame (1). 3 54. Assembly frame according to at least one of claims 51 to 53, so that the support feet (7) are each provided with an impeller (15) and can be extended at least until each impeller (15) is lifted off the ground. 55. Mounting scaffold according to claim 54, so that the wheels (15) attached to the support feet (7) for passing underneath the mounting scaffold are in contact with the ground through the single-axle trailer chassis (9). 56. Assembly scaffold, in particular according to at least one of the preceding claims, characterized in that the frame (1) has support sections (97), the upper ends (98) of which each have the lower end (23) of each support (5) Hinged joint (99) or the like are connected, wherein each support (5) hinged to the corresponding support section (97) can be locked in its functional position in an extension of the support section (97) without play. 57. Mounting scaffold according to claim 56, characterized in that the folding joint (99) consists of an articulated fork (100) or the like. And an articulated pin (101) or the like, which are connected to one another via a common axis of rotation (102) and each with its end (103, 104) facing away from the axis of rotation (102) into the upper end (98) of the support section (97) or the lower end (23) of the associated support (5) can be inserted without play and on these are attached. 58. Mounting scaffold according to claim 57, characterized in that the joint fork (100) of the folding joint (99) is approximately U-shaped, with the two longitudinal legs (105) of the pivot pin (101) of the folding joint (99) being rotatably received . 3-7 59. Mounting scaffold according to one of claims 57 and / or 58, characterized in that the joint fork (100) and pivot pin (101) of the folding joint (99) via a spring-loaded longitudinal bolt (106) in the functional position of the corresponding support (5) with one another without play can be locked. 60. Mounting scaffold according to claim 59, characterized in that the longitudinal bolt (106) in the hinge pin (101) of the folding joint (99) is spring loaded in the direction of the joint fork (100) and in a longitudinal bore (109) of the two longitudinal legs (105) Cross leg (110) from the U-shaped hinge fork (100) can be received. 61. Mounting scaffold according to at least one of claims 57 to 60, characterized in that the joint fork (100) and the pivot pin (101) of the folding joint (99) via a with the spring-biased longitudinal bolt (106) in operative connection, externally operable unlocking element from the Detent position are separable. 62. Assembly scaffold according to claim 61, characterized in that a bolt (112) acting on an end face (111) of the longitudinal bolt (106) and displaceable against the spring force is provided as the unlocking element and associated with at least one side wall (27) Support 5 or the support section (97) which engages through and which can be actuated from the outside, is coupled with a knob or the like. 63. Mounting scaffold according to at least one of claims 56 to 62, so that each support section (97) has a length which corresponds approximately to the height of the railing (6) surrounding the platform (3). 64. Assembly scaffold according to at least one of claims 56 to 63, characterized in that in each case two supports (5) arranged adjacent to one another, in particular on the longitudinal side (12) of the assembly framework, can be folded over in pairs, the support sections (97) of these supports (5) are of different lengths, so that the two supports (5) can be superimposed. 65. Assembly scaffold according to at least one of the preceding claims, that the lifting means can be actuated from the lifting platform. 66. Mounting scaffold according to one or more of the preceding claims, that a load limiting device is provided which blocks the actuation of the lifting means when a maximum load is exceeded. 67. Mounting scaffold according to claim 65, which also means that the load limiting device is based on. a certain one Rope tension value of a lifting rope (10) responds.