WO2002066765A2

WO2002066765A2 - Connection device for scaffolding

Info

Publication number: WO2002066765A2
Application number: PCT/DE2002/000569
Authority: WO
Inventors: Helmut Kreller
Original assignee: Wilhelm Layher Vermögensverwaltungs-Gmbh
Priority date: 2001-02-22
Filing date: 2002-02-19
Publication date: 2002-08-29
Also published as: PL362524A1; PL200827B1; EP1362150A2; WO2002066765A3; EP1362150B1

Abstract

The invention relates to a connection device (10) for scaffolding (50), comprising a receiving device for detachably connecting at least one tube, in particular a railing tube (14) and a connection unit for detachably connecting the connection device (10) to a scaffolding tube (19) or a scaffolding frame (18). The invention is characterised in that the connection unit has a projecting part, which can be detachably connected by a positive and/or force fit into a recess (24) in the scaffolding tube (19) or scaffolding frame (18).

Description

DESCRIPTION

Connection device for scaffolding

TECHNICAL AREA

The present invention relates to a connection device for scaffolding with a receiving device for the detachable connection of at least one rod, in particular a railing rod, and a connection device for the detachable connection of the connection device to a scaffolding rod or a scaffold frame.

STATE OF THE ART

The so-called ayher lightning scaffolding system is known, which has proven itself in practice for decades. A connecting device for railing bars is used, which is designed as a so-called inner box and is welded directly to the vertical post of the vertical frame. Appropriately shaped end regions of railing rods are inserted into the connecting device, which is open at the top, and then clamped in the inner box by clamping a wedge. The inner box can be mass-produced inexpensively as a series component.

The connection of guardrails is required in accordance with the applicable regulations in the outer area of the scaffold facing away from the structure to be scaffolded. If the wall distance between the scaffold and the component to be scaffolded, i.e. on the inside of the scaffold, is more than 30 cm (centimeters), the corresponding regulations stipulate that either brackets or additional inner railing bars must be arranged. The arrangement of additional inner railings is necessary in any case when installing wall units in steel construction halls, since the steel construction halls do not initially form a "wall" between the supporting structures, which means that the technicians located on the scaffolding are additionally secured in the direction of the inside of the scaffolding, that is to say towards the building to be scaffolded.

In order to enable a possibility for connecting railing rods on the inside of the scaffold in such scaffolding situations in the known system scaffold, a special component is used in which the connection device is welded to a wedge coupling. The wedge coupling is clamped on by means of a wedge

Vertical handle attachable. During assembly, this means an increased amount of work, which takes additional time, whereby the problem arises that when the wedge for clamping fixation of the coupling on the scaffold arm is hammered in, the entire connecting device can twist about the longitudinal axis of the scaffold arm, so that additional readjustment work is required. At the same time, the height at which the connection device is to be fastened is not precisely specified and must be adjusted each time the connection device is installed.

This considerably increases the time and effort involved in assembly. Since the special component surrounds the scaffold arm on all sides, "sliding through the hand" is not possible during assembly or disassembly, which slows down the disassembly or assembly speed. PRESENTATION OF THE INVENTION

Based on the prior art mentioned, the present invention is based on the object or the technical problem of specifying a connecting device for scaffolding bars, in particular railing bars, which avoids the disadvantages shown in the prior art, can be produced economically, and the work and time involved assembly and disassembly are significantly reduced and permanent and reliable function is guaranteed.

The invention is also based on the object of specifying a scaffold rod or a scaffold frame which allows a connection device to be connected in a simple manner.

The connection device according to the invention is given by the features of independent claim 1. Advantageous refinements and developments are the subject of the dependent claims.

The scaffold rod or scaffold frame according to the invention is given by the features of independent claim 9. Advantageous refinements and developments are the claims dependent on claim 9.

The connection device according to the invention is accordingly characterized in that the connection device has a projection unit which can be connected in a form-fitting and / or non-positive manner in a recess provided on the scaffolding rod or frame. A particularly advantageous embodiment is characterized in that the projection unit is designed like a hammer head, in such a way that it can be inserted into the recess provided on the railing rod or scaffold frame and engages behind the inner wall of the scaffold rod or scaffold frame by twisting.

In terms of production technology and practical handling during assembly or disassembly, it is particularly advantageous to design the connecting device according to the invention in such a way that the recess is designed as an elongated hole.

On the basis of the inner box for connecting railing rods, which was previously mass-produced, a particularly advantageous development is characterized in that a base plate is attached, in particular welded, on the side of the connecting device facing the scaffolding rod or scaffold frame, on which the projection unit is arranged. The base plate and the projection unit are preferably formed in one piece as a cast part.

In order to ensure a permanently reliable function, a particularly advantageous embodiment is characterized in that an anti-rotation device is provided which secures the connecting device against rotation in the connected state.

With regard to practical handling during assembly or disassembly and at the same time with regard to ensuring a permanently reliable function, a particularly advantageous alternative of the connection device according to the invention is characterized in that the anti-rotation device as a further on the Scaffold rod or scaffold frame side, in particular on the base plate, arranged knobs or protrusion elements is formed, the protrusion length of which is designed such that a click or snap effect occurs when the connecting device is rotated and, when connected, the knobs or protrusion elements on the outer wall of the railing or scaffold frame designed as a round tube cross section.

In order that the locking of the connection device in the assembled state can be reliably guaranteed in the long term, a further development is characterized in that the projection length is chosen so large that the rotation of the connection device is only possible with the aid of

Impact tool or lever tool can be performed.

The scaffold rod or scaffold frame according to the invention is characterized in that it has at least one recess in which a connection device of the type described above can be connected.

In this case, two recesses are preferably provided spaced apart from one another in the longitudinal direction of the scaffold rod or scaffold frame.

In contrast to the known connecting device with a wedge coupling element, the connecting device according to the invention offers the following advantages:

The amount of work and time involved in assembly is significantly reduced. There is no rotation of the connecting device about the longitudinal axis when fixing, since the driving in of a wedge for connecting a Wedge coupling element is omitted. In addition, a clear fixation in height is guaranteed. A particularly great advantage in terms of assembly technology is that a scaffold arm or scaffold frame with a mounted connection device can slide in the hand of the fitter, in particular during disassembly, which is not possible with the known connection device, since this completely surrounds the scaffold rod or the handle of a scaffold frame. Another advantage is that the connection device according to the invention ensures a simple throwing and catching process due to its compact construction and light weight, because such connection devices are thrown upwards by an assembly person located in the lower area during assembly and vice versa.

Due to the light and compact construction, assembly problems and packaging problems are reduced to a minimum. Another big advantage is that

Scaffolding rods or scaffolding frames, which have a mounted connection device, can be stacked without problems in the known stacking devices for such elements without the connection device having to be dismantled, which is not possible in the case of connected connection devices according to the prior art due to their voluminous structure.

Overall, the connection device according to the invention represents a significant improvement in a scaffolding system that requires additional railing rods on the inside.

Further embodiments and advantages of the invention result from the features further specified in the claims and from the exemplary embodiments given below. games. The features of the claims can be combined with one another in any way insofar as they are not obviously mutually exclusive.

BRIEF DESCRIPTION OF THE DRAWING

The invention and advantageous embodiments and developments thereof are described and explained in more detail below with reference to the examples shown in the drawing. The features to be gathered from the description and the drawing can be used according to the invention individually or in groups in any combination. Show it:

1 shows a schematic detailed perspective view of a scaffolding system known per se from components of the Layher flash scaffolding system using connecting devices for railing rods on the inside of the scaffolding system, the latter in an exploded view,

2 schematic detailed perspective of a connection device with base plate and projection unit,

3 a and b highly schematic representation of the

Connection of a connection device to a railing rod in the unmounted position (FIG. 3a) and in the assembled position (FIG. 3b),

4 shows a schematic side view of the connection area of a connection device with a vertical rod in the assembled position, a railing rod being shown in the pulled-out position for reasons of clarity, and 5 shows a schematic top view of the illustration according to FIG. 4.

WAYS OF CARRYING OUT THE INVENTION

The section of a scaffolding system 50 shown in a detailed perspective in FIG. 1 is, in terms of its basic structure, the known flash scaffolding system of the applicant.

In principle, a scaffold bay is constructed from two scaffold frames 18 which are spaced apart in the longitudinal direction and each have vertical scaffold bars 19 which are spaced apart in the transverse direction. The scaffolding bars 19 are connected on the upper side to a U-shaped cross bar 28, a gusset plate 30 being welded in between the cross bar 28 and the vertical bar 19 in the corner region. In the lower end region, the vertical bars 19 are connected to a cross bar 32.

The scaffolding bars 19 have cantilevered insertion areas (not shown in more detail in FIG. 1) with an outer diameter that is smaller than the outside diameter in the bar area, such that the scaffolding frames 18 can be plugged together. In the one facing away from the building

Scaffolding area, that is to say in the front area facing the viewer in FIG. 1, two receiving devices 12.1 are welded to the inside of each front scaffolding rod 19, which are used for connecting railing bars 14.

Coverings 34 are suspended from above in the crossbars 28 of the scaffold frame 18. The stiffening of the scaffold in the longitudinal direction is carried out by a diagonal bar 36, which according to the Representation in Figure 1 in the front gusset 30 of the right scaffold frame 18 is threaded into a recess. In the other end area of the diagonal bar 36, this is connected via a wedge tube coupling (not shown in detail) in the lower area of the front scaffolding bar 19 of the left scaffolding frame 18.

The structure is such that first two scaffold frames 18 are either placed on foot spindles or are placed on existing scaffold frames 18. Then the railing rod (s) 14 are mounted. Then the coverings 34 are hung in and finally the diagonal 36 is connected.

In some cases, it is necessary that additional railing rods must be arranged on the inside of the scaffold 50 facing the structure to be scaffolded, for example if the distance to the component to be scaffolded is greater than 30 cm (centimeters) or there is no "wall" of the structure to be scaffolded, for example in the case of the assembly of wall elements for steel structures.

In order to create a connection option for this purpose, the scaffold bar 19 of the scaffold frame 18, which is at the rear in FIG. 1, has two recesses 24, which are designed as elongated holes, at the corresponding required height. In each of these recesses 24, a connection device 10 can be detachably connected, which is described below.

The connection device 10 has a receiving device 12 which is identical to the known receiving device 12.1 and which can already be produced economically as a large-scale part. At the recording Direction 12 there is a movable wedge 38, which is used to clamp the connection areas of the railing bars 14. For this purpose, the railing bars 14 each have in their end region a downward-pointing, flat projection 40 which can be inserted into the receiving device from above. In the exemplary embodiment, the geometry of the receiving device 12 is selected such that a projection 40 of a railing rod 14 can be introduced from two sides. In the wedge 38 there is an elongated recess 52, within which a transverse one is mounted in the receiving device 12

Bolt 54 runs. As a result, the wedge 38 is displaceable in the direction of the recess 52 and can be hammered in or released in reverse.

The innovation of the connecting device 10 is that a base plate 22 is connected to the receiving device 12, known per se as a large-volume component, on the outside of the receiving device 12 facing the connection area of the scaffold rod 19, to which, in turn, an outwardly projecting projection unit 20 is molded is hammer head-shaped. The base plate 22 and the projection unit 20 are designed as a one-piece casting and form a connection device 16 for simple connection to a railing rod.

In each corner area of the base plate 22, protrusion elements 26. 1 with a protrusion length V are also formed, which form an anti-rotation device 26 when the connection device 10 is installed.

The hammer head of the projection unit 20 has a width BV and a thickness T. To connect the connecting device 10 to the scaffold rod 19, the latter has an elongated hole 24 with the length LA and the width BA which extends in the longitudinal direction of the rod at the required height. The length LA and the width BA of the elongated hole 24 are dimensioned such that the hammer head of the projection unit 20 can be passed through the recess 24.

The connection device 10 is assembled in an extremely simple manner and is shown schematically in FIGS. 3a and 3b. First, the connection device is rotated by 90 ° (old degree) in relation to the position of use. In this position, the projection unit 20 can be inserted into the recess 24 (arrow E). After insertion of the projection unit 20, the connection device 10 is rotated by 90 ° (old degree) (arrow D), so that the hammer head of the projection unit 20 engages behind the inner wall of the scaffold rod 19.

The projection elements 26.1 assume the function of an anti-rotation device when the connection device 10 is rotated in the end position. The protrusion length V is selected such that a resistance is initially built up when the connection device 10 is rotated (D). As soon as this resistance has been overcome, the connecting device 10 “snaps” into its end position (rotated 90 °), the outer sides of the projection elements 26.1 abutting the outer wall of the scaffold rod 19 which is circular in cross section. The protrusion length V is preferably chosen such that a to overcome the resistance to twisting

Lever tool, such as a hammer, must be used and twisting by hand is not possible.

Claims

EXPECTATIONS

01) Connection device (10) for scaffolding (50) with a receiving device (12) for the detachable connection of at least one rod, in particular a railing rod (14), and a connection device (16) for the detachable connection of the connection device (10) to a scaffolding rod (19) or a scaffolding frame (18), characterized in that the connection device (16) has a projection unit (20) which is shaped and / or or formed in a recess (24) provided on the scaffolding rod (19) or scaffolding frame (18) can be non-positively connected.

02) Connection device according to claim 1, so that the projection unit (20) is designed like a hammer head in such a way that it fits into the recess provided on the railing rod (19) or scaffold frame (18)

(24) can be inserted and engages behind the inner wall of the scaffold rod (19) or scaffold frame (18).

03) Connection device according to claim 1 or 2, d a d u r c h g e k e n e z e i c h n e t that the recess (24) is designed as an elongated hole.

04) Connection device according to one or more of the preceding claims, characterized in that on the side of the connection device (10) facing the scaffolding rod (19) or scaffold frame (18) a base plate (22) is fastened, in particular welded, on which the projection unit ( 20) is arranged. 05) Connection device according to claim 4, characterized in that the base plate (22) and the projection unit (20) are integrally formed as a cast part.

06) Connection device according to one or more of the preceding claims, so that an anti-rotation device (26) is present which secures the connection device against rotation in the connected state.

07) Connection device according to claim 6, characterized in that the anti-rotation device (26) is designed as a further knob or projection element (26.1) arranged on the side facing the scaffolding rod (19) or scaffold frame (18), in particular on the base plate (22), whose projection length (V) is designed so that when the connection device (10) is turned, a click or snap effect occurs and, in the connected state, the knobs or projection elements (26.1) on the outer wall of the railing rod (19) or scaffold frame (18 ) issue.

08) Connection device according to claim 7, characterized in that the projection length (V) is chosen so large that the rotation of the connection device (10) can only be carried out with the aid of a lever or impact tool. 09) Connection device according to one or more of the preceding claims, characterized in that the connection of the one rod, in particular railing rod (14), takes place within the receiving device (12) by wedging.

10) scaffolding rod (19), in particular scaffolding arm, or scaffolding frame (18), in particular for a system scaffolding, characterized in that the scaffolding rod (19) or the scaffolding frame (18) has at least one recess (24) in which a connecting device according to one or several of the preceding claims are connected or connectable.

11) scaffolding rod or scaffolding frame according to claim 10, that a d u r c h g e k e n e z e i c h n e t that two recesses (24) are arranged spaced in the longitudinal direction.

12) scaffolding rod according to claim 10 or 11, so that the recess (24) is designed as an elongated hole.