ES2316411T3 - ADJUSTABLE WORK PLATFORM. - Google Patents

Abstract

Work platform that, in the construction of buildings, especially of circular constructions with a circular external contour that varies in diameter by the height of the building, can be used on the external side of the building, which has a basic structure that surrounds the building in its external side with adjustable supports that can be adapted to the external diameter of the building, through which the work platform can be fixed on the building wall, and a platform base supported by the basic structure comprising at least one base plate which can be moved with respect to the basic structure, as well as a railing placed on the outer perimeter of the work platform, characterized in that in the basic structure (1) there are rolling apparatuses (14) that in each case have at least one pair of rolling pulleys whose two rolling pulleys (16) are housed freely rotatable, and because on the sides infe The bottoms of the base plates (12, 13) of the base of the platform are fixed rails (4) comprising a horizontal core and lateral faces arranged laterally therein which run downwards, whose lower free ends are angled inwards and they form extensions (7) that run horizontally inwards, housing the rails (4) profiled in each case at least one pair of rolling pulleys (16) of a rolling apparatus (14) and being able to move along the same pulleys (16) and the profiled rails (4) protruding from the edge of the respective base plate (12, 13) on the external side of the work platform opposite the external wall (26) of the building and a post (18) being fixed ) of the railing support in the protruding section of the profiled rail (4).

Description

Adjustable work platform.

The invention relates to a platform of work that, in the construction of buildings, especially of circular constructions with a circular external contour that varies in diameter by the height of the building, can be used in the outer side of the building, which has a basic structure surrounding the building on its outer side with adjustable brackets that can adapt to the outside diameter of the building, through which the work platform can be fixed on the wall of building, and a platform base supported by the structure basic comprising at least one movable base plate with with respect to the basic structure, as well as a railing placed on the outer perimeter of the work platform.

The document DE-A-3 526 088 already shows a Work platform of this type according to the preamble of the claim 1.

Buildings with circular external contours which vary in diameter by the height of the building are built for example as reinforced concrete towers of an installation wind that have a truncated conical shape. Also water towers and silos can present such external contours, being able to also increase the diameter of the building, possibly only in one certain section of the building, from the bottom up.

Such reinforced concrete constructions are manufactured for example by sliding formwork. Nature of a sliding formwork of this type is that, in this case, formwork braces that penetrate the masonry, in and with which the formwork elements are fastened in its entirety, therefore using in each case the braces previously embedded in concrete in a stage of concreting as base braces for formwork in the following concreting stage In each stage of concreting is incorporated Then a new brace. In this regard it must be specified that the Formwork is sufficiently resistant to bending due to its height. The formwork is then placed up when the wall section previous concreting has set, as it must bear the full weight of the formwork through the formwork braces. Own formwork is composed of the formwork panels themselves and the structure that reinforces the formwork panels. For constructions whose diameter varies by height have already been proposed special sliding formwork with diameter variable.

In the construction of circular constructions Work platforms are necessary on the internal and external side of the building from which necessary work can be carried out and that move along the height as construction progresses. These work platforms are hung on the outer side of the building usually also in fasteners that are joined with braces embedded in concrete. When the diameter The building's exterior varies by the height of the building, it has already been resorted to work platforms whose basic structure presents brackets that can adapt to the respective wall diameter of the building. On work platforms of this type conventional, after a displacement of the work platform the platform base must also be placed again according to the modified diameter of the building. It is also known already configured  individual pieces of the platform base scrollable with respect to the basic structure to facilitate the adaptation of the work platform with the modified external diameter of the building in this section of the building wall. Also in this work platform are needed however jobs from assembly with a relatively large work effort in the Work platform (especially in the base area of platform and railing) after each displacement of the work platform

It is an object of the invention to provide a enhanced work platform of the type mentioned at the beginning that, Together with its platform base, it can be easily adapted at different external diameters of the building wall, being able to also place the necessary railing on the outer side of the Work platform in a simple and stable way. According to invention this is achieved because in the basic structure they are placed rolling apparatuses that in each case have at least a pair of rolling pulleys whose two rolling pulleys are housed freely rotating, and because on the sides bottom of the base plates of the platform base are fixed profiled rails comprising a horizontal core and lateral faces arranged laterally therein down, whose lower free ends are angled towards inside and form extensions that run horizontally towards inside, housing the profiled rails in each case at least one pair of rolling pulleys of a rolling apparatus and being able to move along them and protruding the rails profiled on the outer side of the work platform opposite to the outer wall of the building of the edge of the respective plate of base and being fixed in the protruding section of the rail profiled a railing support post.

The base plates of the platform base can be easily moved on the work platform according to the invention for adaptation to the external diameter of the building wall, moving the base plates with the rails profiles fixed on its lower sides on the pulleys of rolling of rolling apparatuses. The sections of the lanes profiles protruding on the outer side of the platform edge work of the respective base plate serve this respect for the secure grip or support of the railing by the support posts placed in them.

In a preferred embodiment of the invention, the work platform is configured so hexagonal in plan, being arranged in the corner points the movable supports that run horizontally inwards. They are favorably placed in this regard in each case in the area between two supports that run horizontally in each case three base plates that can move through their rails profiles arranged on the lower sides on the pulleys of rolling of rolling apparatuses. Preferably also the handrail railings are rigidly fixed on each case on one or several railing posts, which are attached with a profiled rail of a first base plate, and housed so that can move in the longitudinal direction of the handrail on one or several railing posts that are attached with a rail profiling of a second adjacent base plate. The handrail can thus be adapted to an outside perimeter different from the work platform in the case of a displacement of base plates of the work platform.

Other advantages and details of the invention are explained below by the attached drawing. In this show:

Figure 1, a perspective representation of the basic structure of the work platform;

Figure 2, a schematic view from above of a part of the work platform, being omitted the base plates of the platform base;

Figure 3, a view corresponding to the Figure 2 of a part of the work platform with the plates base in the state completely shifted out;

Figure 4, a view corresponding to the Figure 3 with the base plates in the fully position displaced inward;

Figure 5, a view from above corresponding to figures 2 to 4, the pieces being removed intermediates of the basic structure and a base of correspondingly adapted platform;

Figure 6, a top view of a lane  profiling;

Figure 7, a side view of the rail profiling of figure 6 together with a rolling apparatus;

Figure 8, a schematic side view of the adjustment device and

Figures 9 and 10, a side view schematic and a schematic front view of a post railing with support post and sections of the handrails more superior.

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The basic structure 1 of the platform work that can be seen in figure 1 presented in the points of corner of its hexagonal outer contour seen from above 2 supports oriented in their longitudinal direction towards the center of the work platform, which are housed in the structure basic so that they can move in the direction of their longitudinal extension In the previous free ends of the brackets are fixed shoes 3 through which you can hook the work platform on placed support pieces on the wall of the building. These support pieces can be formed by conventional braces that are used in connection with sliding formwork comprising concrete recessed parts on the wall of the building where they are coiled called sliding cones

This basic structure can be adapted from this mode through movable brackets 2, housed so sliding, to different diameters of circular constructions whose external diameters vary by the height of the building. This basic structure supports, as described below, the platform base that can also be adapted to different diameters of the outer wall 26 of the building. the basis of platform comprises 4 profiled rails fixed on the sides bottom of the base plates, which in figures 6 and 7 show They represent in more detail. The profiled rails 4 comprise a horizontal soul 5 in which side faces are arranged 6 laterals that run down whose lower ends they are angled inwards and form extensions 7 that run horizontally. On the outer sides of the side faces 6 L-shaped fixing souls 8 are fixed which have a vertical section in contact with the outer side of face 6 side and a horizontal section that is cantilevered outwards. In these horizontal sections, perforations 9, 10 are provided. and 11 for fixing the base plates of the base of platform, railing posts and support posts for the railing.

The platform base comprises, in the zones between two movable supports 2 of the basic structure 1 that they run horizontally, in each case three base plates, and specifically the two lateral base plates 12 and the plate 13 of Central base essentially in the form of a trapeze. On the sides Bottoms of the lateral base plates 12 are fixed on each case two profiled lanes 4 that run in the edge areas sides of these base plates, which are configured especially in their lengths slightly differently. In the lower side of the central base plate 13 is fixed a lane 4 individual central profiling. The central base plate 13 it is placed with its lateral edge areas on the plates 12 of lateral base and rests on them. The overlap between the central base plate and the side base plates depends on this respect to the position of the displacement of the plates of base. In the position shifted completely out represented in figure 3 only an overlap occurs relatively reduced base plates 12, 13 in their areas of edge while in the position shifted completely towards inside the base plates (see figure 4) plate 13 of central base almost completely overlaps the base plates 12 lateral.

For the displacement of the base plates rolling apparatuses 14 are placed in the bracings upper horizontals of basic structure 1, and specifically a rolling apparatus 14 is fixed for each profile rail 4 in an external bracing as well as a rolling apparatus 14 in an inner one of the horizontal bracings of the basic structure As can be seen in Figure 7, the rolling apparatuses have a vertical soul 15 in which it is housed on both sides in each case a rolling pulley 16 of freely rotating way. A treadmill could also present several pairs of rolling pulleys. When the base plates 12, 13 adopt the offset position according to figure 3, the lower sides of the horizontal souls 5 of the profiled rails 4 are located on the pulleys 16 of rolling Along the shift inward to the position shown in figure 4, in rolling apparatuses 14 externally located there is a load alternation, so that the rolling pulleys 16 come into contact with the sides upper extensions 7 and roll over them.

On the external side of the work platform opposite the building wall, 4 profiled rails protrude from base plates 12, 13. These extremes Outstanding profiled rails make it possible on the one hand the displacement of the base plates inwards when forming the raceways for external raceways 14, by on the other hand they are used to place or support a handrail of the that the work platform should be provided in the side area external platform base. A railing of this type includes vertical railing posts 17 (see figures 9 and 10). These railing posts 17 are fixed in each case in lanes 4 profiled directly outside the outer edge of the base plates 12, 13 by means of screws that cross the perforations 10 in the fixing souls 8. Posts 17 of railing could also be fixed in the edge area of the base plates 12, 13. In an area located more outside the sections of profiled rails 4 protruding from the edges external of the base plates 12, 13 are also fixed posts 18 support. These support posts 18 are arranged with a inclination with respect to the vertical and support the posts of railing in front of a load in the direction of the external side free of the work platform. On railing posts 17 they are fixed on several heights closed holding frames 19 by their perimeter they are used to hold handrails 20. Although in figures 9 and 10 only handrails are drawn on the area of the uppermost fastening frames 19, preferably such handrails are provided at all heights of the fastening frames 19. In a respective segment of the work platform comprising the two base plates 12 sides and the central base plate 13 are provided for each height of the racks 19 holding two handrails 20 that are they overlap more or less in the central zone of the segment (in the zone of the center railing post 17) according to the position of the plates 12, 13 base. The two handrails 20 are fixed in each case of rigid way in the frames 19 for securing the posts 17 of railing that are fixed on the profiled rails 4 of the side base plates 12. On the other hand, in the openings 21 of the frames 19 for securing the central railing posts 17 handrails 20 can move freely in the direction length of the handrails, therefore in the case of an adjustment of the position of the base plates 12, 13 varies the overlap of the handrails 20 in the area of the central railing post 17, So the railing adapts to different external perimeters of the platform base without the need for work mounting Railing posts, support posts and handrails are preferably formed by profiles of aluminum.

For the displacement of the plates 12, 13 of base and fixing the base plates in a given position is provided an adjustment device. For this they are rigidly joined threaded bars 22 with the plates 12 of lateral base, being fixed in the area of the outer edges of the base plates squares 23 that keep the bars threads, which extend from the base plates outward, located parallel to the profiled rails 4 of these base plates, so that they cannot rotate. In the exterior horizontal bracings of basic structure 1 24 flat steels are placed housing 25 adjusting nuts rotating way, but so that they cannot scroll in the axial direction of the threaded bars 22, through which the threaded bars 22 penetrate. By turning the nuts 25 The base plate in question is adjusted. 0 are well such adjustment devices are provided on all base plates or base plates are dragged without an adjustment device this type while moving a base plate with adjustment device for it through stops corresponding.

If the radius of the outer wall 26 of the work of  construction is smaller than the one drawn in figure 4, the basic structure can be reduced by extracting the pieces 27 of insertion in horizontal bracings. Also I know replace, according to Figure 5, the base plates 12, 13 with those with dimensions adapted to the reduced floor of the segment of the platform base between two supports 2. For two side base plates 12 are used the same devices of rolling placed on the horizontal bracings of the Basic structure 1 than those used previously. For the central base plate are provided for this case two rolling apparatuses on both sides of the horizontal bracing Exterior. In the area of the inner side of the platform base the Weight of the central base plate is supported by the two plates of lateral base on which it rests (the devices 14 of rolling for rail 4 profiled central base plate shown in figures 3 and 4 are fixed in parts 27 of insertion and have been removed with them).

Although hexagonal configuration is preferred represented from the work platform, it would be conceivable and possible for example also a quadrangular configuration. The basic structure can also be built in another way different to the represented form. To reinforce the structure basic tension bars are preferably provided (no represented in figure 1) that run along the diagonal of vertically located, rectangular elements, formed by bracing.

Legend of reference numbers

one

Basic structure

2

Support

3

Hot shoe

4

Profile rail

5

Horizontal soul

6

Side face

7

Extension

8

Fixing soul

9

Drilling

10

Drilling

eleven

Drilling

12

Side base plate

13

Central base plate

14

Rolling apparatus

fifteen

Vertical soul

16

Rolling pulley

17

Railing post

18

Support post

19

Clamping frame

twenty

Railing

twenty-one

Opening

22

Threaded rod

2. 3

Squad

24

Flat steel

25

Adjusting nut

26

Outer wall

27

Insert

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Documents cited in the description

This list of documents cited by the applicant was included exclusively to inform the reader and not It is an integral part of the European patent. This one was made with the utmost care, but the European Patent Office does not assume, however, no liability for possible errors or omissions

Patent documents cited in the description

DE 3526088 A [0002]

Claims (11)

1. Work platform which, in the construction of buildings, especially of circular constructions with a circular external contour that varies in diameter by the height of the building, can be used on the external side of the building, which has a basic structure surrounding the building. building on its external side with adjustable supports that can be adapted to the external diameter of the building, through which the work platform can be fixed on the building wall, and a platform base supported by the basic structure comprising at least one plate of base that can move with respect to the basic structure, as well as a railing placed in the outer perimeter of the work platform, characterized in that in the basic structure (1) are placed rolling apparatuses (14) that in each case present the less a pair of rolling pulleys whose two rolling pulleys (16) are freely rotatable, and because on the sides i Lower of the base plates (12, 13) of the base of the platform are fixed rails (4) comprising a horizontal core and lateral faces arranged laterally therein which run downwards, whose lower free ends are angled inwards and they form extensions (7) that run horizontally inwards, housing the rails (4) profiled in each case at least one pair of rolling pulleys (16) of a rolling apparatus (14) and being able to move along the same pulleys (16) and the profiled rails (4) protruding from the edge of the respective base plate (12, 13) on the external side of the work platform opposite the external wall (26) of the building and a post (18) being fixed ) of the railing support in the protruding section of the profiled rail (4). 2. Work platform according to claim 1, characterized in that the work platform is configured in a quadrangular or hexagonal manner, with horizontally positioned supports (2) positioned at the corner points housed in a movable manner, whose imaginary extensions run inwards towards the center of the work platform. 3. Work platform according to claim 2, characterized in that shoes (3) are attached to the front free ends of the supports (3) to engage the work platform in fasteners placed on the building wall. 4. Work platform according to one of claims 1 to 3, characterized in that in the area between two horizontally movable supports (2) running there are arranged in each case three base plates on whose lower sides at least one is fixed in each case profiled rail (4) that can be moved on the rolling pulleys (16) of the corresponding rolling apparatuses (14). 5. Work platform according to claim 4, characterized in that on the lower sides of the two lateral base plates (12) there are provided in each case two profiled rails (4) arranged in the two lateral edge areas of the plates (12 ) base. 6. Work platform according to claim 5, characterized in that a rolling apparatus provided in the inner area of the basic structure (1) is provided in each case for the profile rails (4) placed on the side base plates (12) as well as one arranged in the outer zone of the basic structure (1). 7. Work platform according to one of claims 4 to 6, characterized in that the edge areas of the central base plate (13) rest on the outer base plates (12). 8. Work platform according to one of claims 1 to 7, characterized in that the railing comprises vertically placed railing posts (17) that are supported by the support posts (18) arranged at an inclination with respect to the vertical facing a load in the direction of the free external side of the work platform. 9. Work platform according to claim 8, characterized in that a respective handrail (20) of the railing is rigidly fixed on one or several railing posts (17) that are connected with a profiled rail (4) of a first plate of base, and it is movable in the longitudinal direction of the handrail (20) in one or more railing posts (17) that are connected with a profiled rail (4) of a second adjacent base plate. 10. Work platform according to one of claims 1 to 9, characterized in that an adjustment device is provided to move the platform base and to fix the platform base in the adjusted position, the adjustment device comprising at least one bar ( 22) threaded rigidly connected with a base plate, which runs through an adjusting nut (25) that is rotatably housed in a piece joined with the basic structure, but so that it cannot move in the longitudinal direction of the threaded rod 11. Work platform according to claim 10, characterized in that, in the case of a displacement of a rigidly connected base plate with a threaded spindle, an adjacent base plate is dragged through one or more stops by this plate rigidly bonded with a threaded spindle.