ES2856127T3 - Starting cross member for a ladder access area of a scaffold system, scaffolding system with starting cross members of this type and procedure for mounting a scaffold system - Google Patents

Abstract

Scaffold system (50) with scaffold frames (52) arranged spaced apart in a grid pattern in the longitudinal direction of the scaffold (GL) with scaffold posts (53) that are linked together by upper cross members (56) and lower sleepers (58 ), being present scaffold platforms (54) connected or suspended on the upper cross members (56) and between two adjacent scaffold frames (52) in the longitudinal direction an access zone (70) with an upper scaffold platform (54.1) is present ) with an ascent hatch (60) to which a ladder (62) is connected on the underside, - characterized in that - on the lower sleepers (58) of the adjacent scaffold frames (52) of the access area ( 70) between each of the scaffolding posts (52) a starting crossbar (10) is positioned with drag, wherein - the starting crossbar (10) in its respective opposite front end areas has a drag contour shape (20.1, 20.2), - the length of the starting crossbar (10) is designed in such a way that it can be subsequently inserted between two scaffold posts (53) of a scaffold frame (52) and in this state entered the shape-drive contours (20.1, 20.2 ) each one of them surrounds at least by areas and with shape drag the outer contour of the respective scaffold post (53), and in the inserted state it rests on the cross member (58), by means of which a secure fixation is achieved without additional connection units, - the starting cross member (10) is designed as a U-profile open upwards, - the shaped trailing contour (20.1, 20.2) is designed as a concave recess (21), in particular partially circular , in the area of the front end of the web (12) of the U-shaped profile and - in each of the starting cross members (10) at least one access scaffold platform (76) is connected or suspended, in which in the upper side is mounted the end zone in bottom of the ladder (62).

Description

DESCRIPTION

Starting cross member for a ladder access area of a scaffold system, scaffolding system with starting cross members of this type and procedure for mounting a scaffold system

Technical field

The present invention relates to a system scaffold with scaffold frames arranged spaced apart in the form of a grid in the longitudinal direction of the scaffold with scaffold posts that are linked together by upper cross members and lower cross members, scaffold platforms being connected or suspended in An access field is present between the upper cross members and between two adjacent scaffold frames in the longitudinal direction with an upper scaffold platform with a climbing hatch to which a ladder is attached on the lower side.

The present invention furthermore also relates to a method for assembling such a system scaffold.

State of the art

A system scaffold is known from the Layher Blitz Technik Scaffold System Catalog, Edition 01/12/2010, which is used in a scaffold construction and has proven its effectiveness over the years. A perspective cut-out of this known Layher Blitz 50 scaffold system is shown in FIG. 8a. The system scaffold 50 has scaffold frames 52 which are arranged in the longitudinal direction of the GL scaffold in a predetermined grid. Each scaffold frame 52 is made up of two scaffold posts 53 spaced in parallel in the transverse direction, which are connected to each other in the upper end area via an upper cross member 56 and in the lower end area through a cross member. bottom 58. To increase the rigidity of the scaffold frame 52, in the lower corner area between the top cross member 56 and the scaffold posts 53 a tie plate 66 is welded in each case. The scaffold frames 52 are designed to this so that they can be nested into each other in the vertical direction. The upper cross member 56 is designed as open-top U-profiles that are suspended on the scaffold platforms 54. The scaffold frame 52 itself snaps onto height-adjustable foot bars 68 with its scaffold posts 53 which, in turn instead, they are mounted on a floor plank 78 on the side of the floor at the lowest level. In the longitudinal direction GL the reinforcement takes place through the connection of diagonals 64 in the area of the tie plate and in the area of the opposite lower end of the adjacent scaffold frame 52. Furthermore, in corresponding longitudinal direction in height, balusters 72 and longitudinal bars 74 on the lower side are connected to the scaffold posts 53 on the outer side. In each case two adjacent scaffold frames 52 together with the scaffold platforms 54 form a scaffold field. To get from the ground to the upper scaffold level an access field 70 is formed which, on the upper side, a scaffold platform 54.1 - suspended on the upper cross member 56 of the adjacent scaffold frames 52 of the access field 70 - has an ascent hatch 60 which is designed to be foldable upwards, a ladder 62 being connected or suspended on the underside to the ascent hatch 60. To securely support the ladder 62 in the lower end area and to ensure that the ladder 62 has a predetermined angle of inclination, for example 70 °, the lower end zone of the ladder rails 62 is mounted on an access scaffold platform 76 which is attached to the left and right to a cross member of The starting bar 80 which is arranged between the foot bars 68 and the scaffolding frame 52 embedded in the foot bars 68. As shown in Figure 8b, the starting cross member 80 has, in its two areas end s in each case a tube sleeve 82 which is engaged in the foot bars 68, before the scaffold frame 52 is engaged. By means of the access scaffold platform 76 connected in this way, which has to be assembled before By starting the assembly of the scaffold frames 52 in the access field 70, a reliable support of the ladder 62 is given.

In practice, however, it occurs that with the assembly of the scaffold system 50 after finishing the system scaffold 50 it is established that the access scaffold platform 76 or the starting cross member 80 has been forgotten to be mounted. shown in Figure 7. The ladder 62 is suspended, depending on the extension of the foot bars 68, in the air or is too steep or too unsafe on the ground of the present terrain. The subsequent placement of starting cross members 80 to suspend an access scaffold platform 76 is not possible since the scaffold frame 52 in the access field area 70 would have to be raised higher than the length of the foot bar 68, adding that adjacent scaffold fields do not allow a lift.

In order to allow a later mounting of a U-starting cross member it is known to use a U-cross member with two welded scaffold couplings. This cross member, however, does not have to be fixed in a complicated way by screwing the couplings, which is time consuming. Due to the couplings, the starting crossbar becomes more expensive and its production becomes more expensive. As an alternative, a U-beam of this type, if it had been forgotten to fit a U-beam in time, is supported between the scaffold posts 53 of the scaffold frame 52 above the lower beam 58 and is then fixed by screwing.

Document US 2004/094362 A1 discloses a scaffolding on wheels which on the left and on the right side presents a scaffold frame with, in each case, two separate vertical posts, the vertical posts being joined through the cross members which connect to the opposing scaffold posts and have a bottom open U-profile cross-section in the assembled state. A scaffold lining is suspended on this cross member on the upper side, which has cross-sectional recesses corresponding to the cross member in terms of the circumferential contour, so that a scaffold platform can be suspended from below on the cross members.

EP 1691 007 A2 discloses a scaffold frame scaffold system with two separate scaffold posts which are joined together via cross members. The cross members are connected in this case to connection units present on the scaffold posts, the cross members in their end region having projecting ridges which surround the scaffold posts in areas on the outside. To secure the connection of the cross members to the scaffold posts, a lever element is used which, in the connected state, grips the connection units of the respective scaffold post underneath.

Document WO 2014/095882 A1 discloses a scaffolding platform in which transverse beams are used which are designed as U-profiles open at the bottom and on their front end sides each have a concave notch.

Description of the invention

Starting from the known state of the art, the present invention is based on the objective or on the technical problem of specifying a system scaffold with a starting cross member, in which the starting cross member can be subsequently mounted simply and quickly in the The case of a system scaffolding that has already been created and produced economically and in which a safe support of the ladder is subsequently allowed in the area of the access field. Furthermore, the present invention is based on the object or technical problem of indicating a method that allows a subsequent mounting of an access scaffold platform as a reliable support construction for the ladder.

The system scaffold according to the invention with a starting crossbar of the type mentioned at the beginning is given by the characteristics of independent claim 1. Advantageous configurations are the subject of claims 2 to 5 which are directly or indirectly dependent on independent claim 1.

The system scaffold according to the invention with a starting cross member is therefore characterized in that a starting cross member is dragged on the lower cross members of the adjacent scaffold frames of the access field in each case between the scaffold posts. , the starting cross member having a shaped trailing contour in its respective opposite front end regions, the length of the starting cross member is designed so that it can subsequently be inserted between two scaffold posts of a scaffold frame and in this state When inserted, the form-engaging contours surround the outer contour of the respective scaffold post at least in areas with form-entrainment in each case and, in the inserted state, rests on the cross-member, thereby achieving a secure fixation without connecting units additionally, the starting crossbar is designed as a U-profile open at the top, the trailing contour shape is designed as a concave notch, in particular partially circular in the area of the front end of the web of the U-profile and at the starting crossbars at least one access scaffold platform is connected or hooked in each case, on the which is mounted on the upper side the lower end area of the ladder.

In the system scaffold according to the invention, the starting cross member, due to its constructional configuration, will be placed later, in the case of a finished assembled system scaffold, in a simple way on the corresponding sleepers of corresponding scaffold frames of an access field, being achieved in the positioned state without additional positioning of connection units by means of the trailing contours in order to securely fix the starting cross member on the cross member, so that thereafter the access scaffold platform can be suspended on the starting cross member and the ladder with the lower end zone of the ladder rail can be securely mounted on the access scaffold platform.

According to the invention, the starting crossbar is designed as a U-shaped profile open at the top.

According to the invention, the shaped trailing contour is designed as a concave notch, in particular partially circular in shape, in the front end region of the web of the U-profile.

In this connection, the smallest free inner distance of the form-drive contour is designed correspondingly to the free inner distance of the scaffold posts of a scaffold frame, so that in any case a reliable drive is always achieved with scaffold poles. The design of a partially circular notch satisfies the fact that scaffold posts are generally designed as round tube profiles.

An alternative configuration, which has a structurally different trailing contour, is characterized in that the trailing contour of shape is formed by ridges of the U-shaped profile projecting from the web, the free inner distance of the ridges corresponding essentially to the external diameter from the post scaffold frame scaffold.

It is particularly advantageous to have web recesses in the web of the U-profile of the starting cross member through which the edge plank bolts can be guided, so that the connection of edge planks is also possible in this area.

A particularly economical production of a starting cross member is allowed because the U-profile, in terms of the cross section except for the form-drive contours, corresponds to the cross section of the upper cross member of the scaffold frame. The upper cross members are produced in particular as a serial component in a large number of pieces and can be used according to the invention by simply placing the concave trailing contour described above as the starting cross member.

In order to prevent a sliding access scaffold platform connected in the longitudinal direction of the starting beam, that is to say in the transverse direction of the system scaffold, the starting beam can additionally have clamping units which abut, for example, with the constructions suspended from the access scaffold platform. In this regard, the clamping units can preferably be designed as profile bar elements welded between the flanges of the U-profile in their upper end region.

The method according to the invention for mounting a system scaffold as described above with subsequent mounting of an access scaffold platform to support a ladder in an access field is given by the features of claim 6. The The method according to the invention is therefore characterized in that after the system scaffold has been created in the access field on the lower cross member of the scaffold frames arranged to the left and right of the access field, a cross member is placed in each case of a system scaffold and a form drag is achieved with the scaffold posts of the respective scaffold frame, at least one access scaffold platform and the lower end zone of the The ladder is mounted on the access scaffold platform.

To ensure a safe ascent, the ladder is preferably arranged at an angle to the horizontal of 60 ° to 80 °, in particular about 70 °.

Other embodiments and advantages of the invention result from the features also set out in the claims as well as from the embodiment examples indicated below.

Brief description of the drawing

The invention as well as advantageous embodiments and developments thereof are described and explained in detail below by means of the examples represented in the drawing.

They show:

FIG. 1 is a schematic perspective representation of an exemplary embodiment of a starting crossbar for the rear mounting of an access scaffold platform with the trailing contours present in each case in the end area of the front side,

figure 2 schematic plan view of the starting cross member according to figure 1,

figure 3 schematic side view of the starting cross member according to figure 1,

figure 4 schematic cross-section through the starting beam according to figure 1, figure 5 schematic perspective representation in sections of an assembled system scaffold with subsequently mounted starting beams in the access field and scaffold platform connected to the starting crossbars to support a ladder,

figure 6 schematic perspective representation of detail A of figure 5,

figure 7 schematic perspective representation of an assembled system scaffold without access scaffold platform in the access field,

Figure 8a schematic perspective representation in sections of a known system scaffold assembled with an access scaffold platform assembled at the beginning of the assembly with the use of a known starting cross member, which is connected between the foot bars and the frame of supported scaffold and

figure 8b schematic perspective representation of the known starting crossbar used in the system scaffold according to figure 7.

Mode of carrying out the invention

Figures 8a and 8b show a perspective sectional representation of a known system 50 scaffold, specifically the Layher Blitz scaffold system, in the case of normal construction with the use of a known starting cross member 80 and a scaffold platform. of accesses 76 connected to the sleepers 58 in the access field 70, in which, on the upper side, a ladder 62 is mounted that leads to the ascent hatch 60 of the scaffolding platform 54.1 arranged on the floor that is located above. This system scaffold 50 known is described in the introduction to the description. Figure 7 shows the situation of the system scaffold 50, in which it has forgotten to mount the known starting cross members 80 in time, so that a connection of an access scaffold platform 76 is not possible, whereby it is not possible a safe inclined support of the ladder. Like components bear the same reference numerals as in Figure 8 and are not explained again.

Figures 1 to 4 show an exemplary embodiment of a starting cross member 10 which is designed as a U-shaped profile open at the top with a bottom side web 12 and flanges 14 formed on both sides, directed upwards. In each end region of the starting cross member 10, a concave trailing contour 20.1 or 20.2 is formed in the web 12, each having a partially circular recess 21. The diameter of the partially circular recess 21 corresponds to the diameter of a scaffold post 53 of a scaffold frame 52. The smallest free inner distance of the opposing shape trailing contours 20.1 or 20.2 is designated in Figure 1 by the distance measure QL. This distance measurement QL of the shape trailing contours 20.1, 20.2 or of the recess 21 corresponds essentially to the free interior distance of the scaffold posts 53 of the scaffold frame 52.

The longitudinal direction of the starting cross member 10 is indicated by L in FIGS. 1 to 4. The longitudinal direction L of the starting cross member 10 corresponds, in the state of the starting cross member 10 inserted into the system scaffold 50 to the transverse direction of the system scaffold 50. Due to the shown constructional configuration of the starting cross member 10, it can be subsequently mounted on a system scaffold 50, specifically in a state as shown in figure 7, in which you have forgotten to create the possibilities of connection for an access scaffold platform 76.

It is further illustrated in FIG. 1 that web notches 16 are present in the web 12 of the starting cross member 10, which serve to enable possibly present edge plank bolts to be inserted, so that edge planks can also be connected in this area.

In order to create, with the starting cross member 10, the possibility of connecting an access scaffold platform 76 in the area of an access field, the starting cross member 10 is simply positioned on the lower cross member 58 of the frame frame. scaffold 52, which is located to the left or right of the access field 70. By means of the selected distance QL and the selected geometry of the form trailing contours 20.1 or 20.2 a trawl is automatically generated without the use of additional attachment means. shaped between the positioned starting cross member 10 and the scaffold posts 53 opposed in the transverse direction. Thus, the starting cross member 10 is securely mounted on the respective scaffold frame 52. An access scaffold platform 76 can now be easily suspended in the access field floor area 70 on the starting cross members 10 positioned and mounted on both sides, thereby providing a secure supporting surface for the ladder 62 Thereby, ladder 62 can be arranged and mounted at a preferred angle of inclination relative to the horizontal of 70 °.

This state is represented schematically in FIG. 5, for example in a scaffold of known system 50. The system scaffold 50 corresponds to the system scaffold 50 shown in FIG. 7, however with the subsequent assembly of the starting cross members 10 and the access scaffold platform 76.

FIG. 6 shows in detail the arrangement of the starting cross member 10, which is simply positioned later and connected in a positive manner, on the lower cross member 58, not visible in FIG. 6, of the scaffold frame 52. By simply placing the starting cross member 10 on the lower cross member 58 is achieved without additional connecting means a form-drive with the two opposing scaffold posts 53, because a secure bearing is allowed and a simple rear connection of an access scaffold platform 76 is ensured.

The shape drag contour 20.1 or 20.2 shown represents a constructive solution for generating a shape drag of the starting cross member 10 placed on the cross member 58 with the adjacent scaffold posts 53. Other constructive drive configurations are also conceivable.

Claims (7)

1. Scaffold system (50) with scaffold frames (52) arranged spaced in a grid pattern in the longitudinal direction of the scaffold (GL) with scaffold posts (53) which are linked together by upper cross members (56) and lower sleepers (58), being present scaffold platforms (54) connected or suspended on the upper cross members (56) and between two adjacent scaffold frames (52) in the longitudinal direction an access zone (70) with an upper scaffold platform is present (54.1) with an ascent hatch (60) to which a ladder (62) is connected on the lower side, - characterized in that - on the lower sleepers (58) of the adjacent scaffold frames (52) of the access area (70) between each of the scaffold posts (52) a starting cross member (10) is fitted with drag, where - the starting cross member (10) in its respective opposite front end areas has a shaped trailing contour (20.1, 20.2), - the length of the starting crossbar (10) is designed in such a way that it can subsequently be inserted between two scaffold posts (53) of a scaffold frame (52) and in this state introduced the shape trailing contours (20.1, 20.2 ) each one of them surrounds at least by areas and with shape drag the outer contour of the respective scaffold post (53), and in the inserted state it rests on the cross member (58), by means of which a secure fixation is achieved without additional connection units, - the starting crossbar (10) is designed as a U-profile open upwards, - the shaped trailing contour (20.1, 20.2) is designed as a concave notch (21), in particular partially circular, in the area of the front end of the web (12) of the U-shaped profile and - on each of the starting crossbars (10) at least one access scaffolding platform (76) is connected or suspended, on which the lower end zone of the ladder (62) is mounted on the upper side. 2. Scaffolding system according to claim 1, - characterized in that - the shape trailing contour of the starting crossbar (10) is formed by ridges (14) of the U-shaped profile that protrude with respect to the web (12), where the free interior distance of the ridges (14) corresponds essentially to the outside diameter of scaffold post (53) of scaffold frame (52). Scaffolding system according to one or more of claims 1 to 2, - characterized in that - In the web (12) of the starting cross member (10) there are web notches (16), through which possible edge plank bolts can be guided. Scaffolding system according to one or more of claims 1 to 3, - characterized in that - the U-profile of the starting cross member (10) corresponds in terms of the cross section, except for the form-drag contours (20.1, 20.2), with the cross section of the upper cross member (56) of the scaffold frame (52 ). Scaffolding system according to one or more of the preceding claims, - characterized in that - the starting crossbar (10) has clamping units that prevent the sliding of a connected access scaffold platform (76). Method for mounting a scaffold system (50) according to one of claims 1-5 with subsequent mounting of an access scaffold platform (76) to support a ladder (62) in an access area (70) , in which - after mounting the scaffolding system (50) in the access area (70) on the lower cross member (58) of the scaffolding frames (52) arranged to the left and to the right of the access area (70), a starting crossbar (10) of the scaffold system (50) is placed on each of them and a form drag is achieved with the scaffold posts (53) of the respective scaffold frame (52), - at least one access scaffold platform (76) is connected or suspended on the starting crossbar (10) and - The lower end area of the ladder (62) rests on the access scaffold platform (76). 7. Method according to claim 6, - characterized in that - the ladder is arranged at an angle to the horizontal from 60 ° to 80 ° (degrees), in particular about 70 ° (degrees). Ċ