HK1031246B - Trelliswork modular scaffolding system - Google Patents

Description

The invention relates to a scaffolding system or rack for a wide variety of tasks and applications with support tubes and horizontal and/or diagonal bars, each support tube having one or more spaced support knots, which are interfaced by the connecting elements.

Scaffolding of this type has been state-of-the-art for years.

US-A-3 420 557 is known to have a frame in which the scaffold knots have four wedge pockets into which horizontal and diagonal bars are inserted by means of wedge-shaped plug elements. The disadvantage here is that, for the installation of a horizontal latch, the connecting head of the latch is connected to the wedge-bag by means of a separate loose, non-lossable wedge.

The most important criteria for the performance of modular scaffolding systems are the bending torques, transverse, normal and diagonal forces. The better these values are, the more economically efficient structures can be constructed, since less material is required.

The modular scaffolding systems known on the world market by Layher, Plettac, Rux, Hünnebeck-Röro, Cuplok and others use scaffolding knots which differ only slightly in shape and are therefore on a level with respect to their efficiency and performance.

In the case of modular scaffolding, scaffolding rods are mounted as spacing elements in the horizontal and vertical directions by means of knot elements to two- or three-dimensional scaffolding structures in the form of facades, spaces and other scaffolding structures. For more variable usability, improved performance, more economical design options and reduced production costs of modular scaffolding and its system components, for their efficient and less time-consuming assembly, material-reduced solutions with higher node carrying capacities and higher connection cross-section sizes for modular scaffolding systems are required.

These system components must be so constructed and so harmonized in their interaction, in their design and mechanical connection to absorb forces, loads and bending torques that all safety requirements are reliably met. The safety requirements also relate to the installation of lifting protectors, which have been required up to now.

Vertical diagonal and horizontal diagonal strips (diagonal bars) in modular scaffolding are necessary for the absorption and dissipation of diagonal forces and thus also for truss structures with scaffolding elements to ensure the required stability and safety.

The vertical diagonal forces known on the market, which are used in the modular scaffolding systems of most manufacturers, are relatively low in the potential diagonal force in the scaffolding nodes.

The reasons for this relatively low load capacity are to be found in the technical design of the known vertical diagonal stripes. e maximum load capacity of the known knot connections, whether disc, plate or cup, is relatively low and therefore not suitable for truss substructures of standpipes, horizontal and diagonal bars.

A modular scaffolding knot with significantly improved connectivity is described in EP-B-0622 504. The design of the wedge bags and wedge-shaped connecting elements is similar, with the wedge bags formed by parallel walls.

The purpose of the invention is to further develop, in order to ensure the façade fit and the technical fit of a modular scaffolding system, the technical and design design of the system components, in particular scaffolding, scaffolding joints and connecting elements, and the corresponding vertical diagonal and other system components, so as to further increase the connecting cross-sectional dimensions or the joint load capacity and stability to the façade of the wedge-bag modular scaffolding system in parallel interaction of all system components and to meet the latest load guidelines, including cyclic and dynamic loads.

Façade rigidity means increasing the rigidity of the structure parallel to the façade by means of technical and design measures, by means of advanced structural elements, to such an extent that the requirements for approval of all standard versions as facade rigidity without restrictions (up to 8 m anchorage). This means optimising the material, storage and transport costs, since only one scaffolding system is needed to cover all the areas of application.

The technical design measures are used to increase the permissible connecting section sizes further, so that, inter alia, the connecting value in terms of the permissible tensile strength of the vertical diagonal is approximately equal to the normal connecting section size of the scaffolding node (positive and negative) which is also to be increased.

A solution to this problem according to the invention is given in claim 1 and further training of the invention is indicated in the sub-claims. In the case of wedge-shaped modular scaffolding or scaffolding with wedge-shaped connections of scaffolding knots and connecting elements, the wedge-shaped connecting elements present on the spacers intervene in wedge-shaped scaffolding with geometries different from the cross-section of the connecting elements. The wedge-shaped connectors are firmly connected to the spacers; after the horizontal connectors have been installed, the wedge-shaped connectors are placed in the wedge bags so that their narrow sides are attached to both the standpipe and the front side of the wedge bag (6) facing away from the standpipe (3). The two-sided position of the wedge-shaped connecting elements over their narrow sides, the so-called wedge-shaped cross-sectional edges, guarantees, in conjunction with the design of these narrow sides, the high load-bearing capacity of the connecting members. The concave arch depth can be up to 0.5 mm. In addition, the wedge-surface edges have a precisely defined surface, which, in addition to the defined concave arch, also has a certain surface roughness with a roughness depth of 120 μm.

The wedge-shaped connecting elements can be made, as is the case at present, with a rectangular cross-section, i.e. with parallel sides, but they can also have a balled cross-section, i.e. the sides have a curvature. In a special embodiment, the angle of curvature β increases from the front side of the wedge-shaped plug facing the standpipe, starting at angle β = 0.

The reception openings of the wedge bags are made with a width considerably greater than the thickness of the wedge-shaped plug elements, so that on each side there is a space of about 1 mm between the flanks of the wedge-shaped plug elements and the inner walls of the wedge bags.

In another preferred embodiment, the desired radial rotation space of the wedge-shaped plug in the wedge bag is achieved by moving the side parts of the wedge bag not parallel to each other but away from the standpipe, thus giving the wedge bag a wedge shape with a blunt tip, which is different from the standpipe.

The horizontal connecting elements are fitted by means of the connection pairing described, wedge-bag - wedge-shaped plug. The diagonal bars are mounted by means of wedge heads fixed on each side of a diagonal rod and not rotatable, which are pushed over the respective wedge bag.

A vertical diagonal line of the invention consists of a tube of length L, cut at both ends at an angle α perpendicular to the length L, and a cone head at each of these ends in a transverse position, i.e. with the width side.

The wedge head is a square hollow body with two wide sides, two narrow front sides with grooves and reception openings for the wedge bag, and a top and bottom side each with a slit opening for inserting an unlockable wedge.

Above the cut-off at the narrow front side, the vertical diagonal rod head, which has been pushed up to the receiving pocket of the standpipe by means of its opening at the narrow front side, is in the installation position, flat on the wall of the standpipe at the knot area. The vertical diagonal of the wedge, i.e. the wedge head, is fixed in this installation position and the subsequent locking and tensioning is effected by pushing or striking (striking) a wedge extending in the plane of the width and the wedge bag.

This connection of the knots according to the invention leads to a decisive connection of the vertical diagonal stripe with the standpipe. This allows a large part of the load attacking the vertical diagonal spring to be directed into the standpipe with very little leverage.

The horizontal rigidity required for approval as a façade frame is achieved by the installation of system scaffolding with a tube-locking system and self-extracting gravity-driven locking system.

The interaction of all the framing components of the system in accordance with the invention and the considerably higher allowable values for the main connecting cross-sections in the node compared to known modular framing systems, combined with the strong connection of the framing linings with a tube-locking support and integrated self-locking to ensure horizontal rigidity, result in a variety of advantages and more economical design possibilities. The main advantage is that only one framing system is needed for all application cases and applications. Among other things, the scope of application of KT-modular frames can be extended to the fitting of framing frames or round frames. Furthermore, the additional fitting of framing frames can be improved by adding additional solutions such as the new FZF-B88.2.12.87 (B88.1.9.98) - the new FZF-B88.12.87 (B88.12.99) - the installation of a new fitting for the building and the maintenance of the structural engineering and structural engineering of the building.

A major advantage is the use of the KT modular scaffolding system, after a standard design with a construction and use manual as part of the first legally valid building inspection façade scaffolding approval for a modular scaffolding system, issued in accordance with the latest approval guidelines.

New or more economical design possibilities and advantages in structural engineering are also the result of the enormously high load capacity of the vertical diagonal connection in interaction with the other improved or higher connecting sizes in the scaffolding node. Such applications include, for example, the construction of supporting, supporting and formwork structures and the assembly and dismantling of specialist support structures such as halls, hall roofs, drawbridges, platforms, stands, stands, stands and advertising stands of any span, shape and size.

The application of the vertical diagonal stripe of the invention has led to a considerable expansion of the possibilities of using modular scaffolding for the effective erection and dismantling of scaffolding and to the economic, simple, light, fast and reliable assembly of scaffolding with the many possibilities for the assembly of structural frameworks.

The main advantages, especially in the formwork industry, are also the possibility of working without a gap between the coating and the scaffolding, since the bar reaches the scaffolding in a plane.

In scaffolding structures, the new technical design of the scaffolding knot described with much higher knot loading capacities, in particular the high bending torque loading capacity of the latch, can considerably reduce the number of vertical diagonal strokes required.

Further details, features and advantages of the invention are given in the following description of an embodiment by reference to the accompanying drawing.

Show it Fig. 1 the design of the wedge-shaped plug elements,Fig. 2 and 3 the geometry of the wedge bag,Fig. 4 the construction of the wedge head,Fig. 5 the sections A-A and B-B through the wedge head as shown in Fig. 4.2,Fig. 6 the wedge head with wedge inserted,Fig. 7 a complete diagonal drive,Fig. 8 the view of a diagonal drive in mounting position andFig. 9 the construction of a framing knot of the invention with wedge bags and two horizontal hinges and an inserted diagonal grille.

Figure 1.1 shows the design of a horizontal bar 1 (end piece) with wedge-shaped plug elements attached to the sides 5. The right end of the bar in Figure 1.1 is equipped with a wedge-shaped plug element 5 whose wedge-shaped intersection edges 5.3 have a concave arch of about w = 0.5 mm inwards. The intersection edges are rectangular and have a defined surface with a roughness depth of 120 μm. The diagram A-A in Figure 1.2 gives an overview of the preferred cross-sections of the wedge-shaped plug elements 5. The 5.1 side panels may also be made in a balled shape, i.e. with a curvature. In a special design (shown below in Fig. 1.2) the angle of curvature on the front side facing the standpipe 3 (see Fig. 2) is 5.2 β = 0 and increases in the axial direction of the horizontal bar 1.

Figures 2 and 3 illustrate the geometry of the wedge bag 6 with four wedge bags 6 each attached as scaffolding knots 4 at certain intervals to the modules of the stand pipe 3, preferably welded. In the first embodiment of the cone bag 6 in Fig. 2 (enlarged cross sections A to B), the cone bag has parallel side sections 6.2 which have a reception opening 6.1 with a width considerably greater than the thickness of the suspended cone-shaped plug 5. The clearance or clearance z between the flanks of the wedge-shaped connecting elements 5 and the inner walls of the side sections 6.2 of the wedge bag 6 is approximately z = 1 mm each. The geometry of the pair of wedge-shaped connecting elements 5 and wedge-bag 6 according to the present invention makes it possible to rotate the horizontal bar 1 by an angle γ, which is advantageous for fittings of round structures.

In a second embodiment of the wedge bag 6 as shown in Figure 3, the side sections 6.2 of the wedge bag 6 are joined together, so that the cross section is conical.

Fig. 4 illustrates the construction of the cone head, which is formed as a square hollow body 7. Fig. 4.1 shows the top 13 with the slot 12 for cone 15. The mantel line is formed by the wide sides 8 and the narrow front sides 9. The wedge head 7 is mounted in the mounting state (see Figures 8 and 9) on the standpipe 3 via the 9.1 wedge.

Figure 4.2 shows the width of the wedge head 7 on the left, on which the tube 2.1 is mounted and fixed by the diagonal stripe cut at an angle α below the angle α (see Figure 7).

The object of Figure 4.3 is analogous to Figure 4.1 the underside 14 of wedge head 7 with the slot-shaped opening 12 from which wedge 15 protrudes when mounted.

The sections A to A and B to B in Fig. 5 show the design of the cavity 10 of the wedge head 7 and the proportions of wall strengths and cavity 10. The cavity 10 is used by the openings 11 to accommodate the wedge bag 6 and by the openings 12 to guide the wedge 15.

Figure 6 shows the front or side view of a wedge head 7 on its wide side 8 and its narrow front side 9, with the wedge 15 pushed in, i.e. in the locking position. The notch pins 16 in wedge 15 ensure the necessary mobility of the wedge during assembly and disassembly; they ensure the unlockability of the wedge.

Figure 7 illustrates the construction of a complete diagonal tube consisting of pipe 2.1 and wedge heads 7. The length L is variable at a variable angle α.

Figure 8 shows the diagonal projection 2 described, consisting of cone head 7 and pipe 2.1 in the mounting position. The knot 4 on the scaffolding 3 shown has four cone pockets 6. The right, invisible cone pocket 6 is inserted into cone head 7 over its reception opening 11 in the narrow front side 9. The narrow front side 9 of the wedge head 7 with the groove 9.1 is pressed horizontally to the wall of the support tube 3 by means of the force-operated coupling produced by the in-set wedge 15.

Fig. 9 shows the design of a scaffolding knot 4 according to the invention with wedge pockets 6 and two horizontal bars 1 and a diagonal bar 2 suspended. The diagonal bar 2 is pushed in an arrow direction through the reception opening 11 of the wedge head 7 over the wedge pocket 6 so that the wedge head 7 absorbs the wedge pocket 6 and the wedge head 7 - wedge pocket 6 pair is locked in this installation position by the wedge 15.

List of reference marks

The following are the main components of the system: 5.1 Flanks 5.2 Front side of the standpipe 5.3 Edge of wedge 6 Wedge bag 6.1 Opening of reception 6.2 Side 7 Keel head 8 Width of 79 narrow front side 7 9.1 Slit 10 Hole in 711Screw opening for the wedge bag 612Screw opening for wedge 1513Top of 714Bottom of 715Key 16

Claims (10)

1. Truss modular scaffold system with tubular standards (3), horizontal and diagonal scaffold members (1, 2) and accompanying system components whereby on each tubular standard (3) one or several scaffold joints (4) placed above each other at a distance from each other are arranged, which in the basic version consist of four wedge pockets (6) each, with which connecting elements of the scaffold members (1, 2) through wedge-shaped plug-in elements (5, 15) engage, whereby

   a) for mounting of the horizontal scaffold members (1) the wedge-shaped plug-in elements (5) engage with wedge pockets (6) of the scaffold joints (4) made with a geometry different from that of the section of the wedge-shaped plug-in elements (5), and the mounting opening (6.1) of the wedge pockets (6) made with parallel side walls (6.2) is in its width wider by 2 × approx. 1mm than the thickness of the wedge-shaped plug-in elements (5) or the side walls (6.2) of the wedge pockets (6) conically approach each other and

   b) for mounting of the diagonal scaffold members (2), at each end of a diagonal brace (2.1) of the diagonal scaffold member a wedge head (7) is arranged and designed such that it, seated on the wedge pocket (6), bears against the tubular standard (3) and is locked by means of a wedge (15) passing through wedge head (7) and wedge pocket (6)

   characterized in that the wedge-shaped plug-in elements (5) at their front and rear wedge surface intersecting side (5.3) have wedge surfaces curved to the inside.
2. Truss modular scaffold system to Claim 1 characterized in that the wedge-shaped plug-in elements (5) are made with a convex cross section whereby the curvature of the flank sides (5.1) increases beginning from the face side (5.2) of the wedge-shaped plug-in elements (5) turned to the tubular standard (3) with the angle of curvature β = 0.
3. Truss modular scaffold system to Claim 1 or 2 characterized in that the wedge surface intersecting side (5.3) have a predetermined surface roughness with a roughness height of 120 µm.
4. Truss modular scaffold system to Claim 3 characterized in that the curvature depth, w, of the wedge surface intersecting side (5.3) is approx. 0.5 mm.
5. Truss modular scaffold system to any of the Claims 1 to 4 characterized in that a single vertical diagonal brace (2) consists of a tube (2.1) of the length L, which is terminated at its both ends diagonally cut at an angle α with a wedge head (7) made as an approximately cuboid-shaped hollow body, through which the mounting of the diagonal brace (2) at the joint (4) of the tubular standard (3) is performed, whereby the tube (2.1) bears against the long side (8) of each wedge head (7) and, between the normal to the longitudinal axis of the tube (2.1) and the longitudinal axis of the wedge head (7), the angle α is included and the wedge head (7) has, additionally, the following features:

   a) the wedge head (7) has, at each short face side (9), a recess (9.1) matching with the peripheral curvature of the tubular standard (3) and, in mounting position, bears to the tubular standard (3) via this recess (9.1),

   b) the wedge head (7) has a hollow space (10), into which a wedge pocket (6) of the tubular standard (3) is entered through the mounting opening (11) in the short face sides (9) of the wedge head (7), and

   c) other slot-shaped openings leading to this hollow space (10) in the wedge head (7) exist on the top side (13) as well as on the bottom side (14) of the wedge head (7), through which the wedge (15), which matches with the shape of the openings (12), entering through the opening (12) on the top side (13), subsequently passing the wedge pocket (6) and leaving through the opening (12) on the bottom side (14), is inserted, whereby the wedge head (7) is pressed against the tubular standard (3) with its recessed face side (9) thereby fixing and fastening the whole vertical diagonal bracing in the mounting position.
6. Truss modular scaffold system to Claim 5 characterized in that the wedge (15) has a notched taper pin each at its broader top end and its smaller bottom end which prevents sliding-out of the wedge (15) from the slot-shaped openings (12) on the top side (13) or bottom side (14) of the wedge head (7).
7. Truss modular scaffold system to Claim 5 and 6 characterized in that the wedge (15) has a unique wall thickness over its whole length, which is smaller than the width of the opening of the wedge pocket (6) and the width of the slot openings (12).
8. Truss modular scaffold system to any of the Claims 5 to 7 characterized in that the length and conical shape of the wedge (15) are made such that, in mounting position, the wedge (15) passes the wedge pocket (6), protrudes on both sides (13, 14) of the wedge head (7), and presses the face side (9) of the wedge head (7) with the recess (9.1) to the tubular standard (3) by the flank pressure of the wedge (15) in the wedge pocket (6).
9. Truss modular scaffold system to any of the Claims 5 to 8 characterized in that the tube (2.1) of the diagonal brace can be made in various lengths L, whereby with increasing length L the angle α for the connection of the tube (2.1) to the long side (8) of the wedge head (7) decreases.
10. Truss modular scaffold system to any of the Claims 1 to 9 characterized in that in order to achieve the necessary horizontal stiffness for use as a facade scaffold, tubular cross bar plates bear on the horizontal scaffold members (1) between the scaffold joints (4) by means of claws and are locked by automatic lift-off protection devices, whereby the claws are fastened to the frame of the tubular cross bar plates and the lift-off protection devices are integrated into the frame of the tubular cross bar plates and are driven by gravity.