CZ292679B6 - Device for connecting two one-rail ladder members - Google Patents

Abstract

The invention relates to a device for connecting two one-rail ladder members (10, 12) which each have a central rail (14) and a number of steps (16). Said device includes a tongue (20) that is arranged at the end of the one ladder member (10), and coupling plates (28), which are arranged at the end of the other ladder member (12) and form a gap (30) therebetween for holding the tongue (20) which can be arranged on the rear side of the central rail (14) and is in a plane defined by the longitudinal axis of the central rail (14). Said gap (30) between the coupling plates (28) may taper in the direction of insertion. A spring-loaded stop bolt (32) can lock in the gap (30) on the tongue (20) when it (20) is in its final position. Said tongue (20) can be secured to a plate (18) secured to the central rail (14). The coupling plates (28) can also be secured to a plate (26) secured to the central rail (14) of the other ladder member (12).

Description

Technical field

BACKGROUND OF THE INVENTION The invention relates to a device for connecting two parts of a ladder to a single slot, each having one central slot and a plurality of steps.

BACKGROUND OF THE INVENTION

For climbing to still unoccupied workplaces on tall construction elements, mounting ladders with guiding rails for climbing protection are used, which are temporarily suspended, bolted or attached to the construction body, as seen from DE-U-81 22 295. These ladder elements they have two lateral slots between which several rungs are arranged. At the upper ends of the slots, the tongues stand out, onto which another element of the ladder is slid. The connection between the individual ladder elements is largely rigid.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device for connecting two parts of a ladder which has sufficient mobility both in the lateral direction and also forwards and backwards so that the mounting ladder formed from the individual ladder elements can also perform movements of the building built on unstable subsoil.

The object of the invention is to provide a tongue which is arranged at the end of one part of the ladder and connecting plates which are arranged at the end of the other part of the ladder and between which a gap is provided for receiving the tongue.

The tongue can be firmly mounted in the gap, preferably with a clearance of about 3 °.

Preferably, a blunt connection is formed between the parts of the ladders, the tongue being arranged on the back of the central slot, facing in the direction of the central slot, and the connecting plates form a slot therebetween, which tapers in the insertion direction.

Advantageously, the tongue is secured in the gap of the connecting plates by a locking pin which is arranged transversely to the connecting plates, the locking pin being snapped into the opening of the tongue.

Advantageously, the tongue and the two connecting plates are firmly welded to the plates which are fixedly screwed on the back of the central slot. By means of the connection device according to the invention, the two ladder elements can be tilted against each other by approximately 3 [deg.] Back and forth and laterally without stressing the contact between the ladder elements or the fastening device.

Normally, the tongue is arranged on the lower part of the ladder and the connecting plates are arranged on the upper part of the ladder. However, the opposite arrangement is also possible.

A spring-loaded snap-in pin is expediently provided at the upper end of the lower part of the ladder against an unintended ejection of the co-moving gripper.

-1GB 292679 B6

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is explained in more detail below by way of example with reference to the drawing.

FIG. 1 schematically depicts the two ladder elements at a distance from one another.

FIG. 2 schematically shows the two ladder elements in a coupled state.

Examples of the invention

According to FIGS. 1 and 2, the lower part of the ladder 10 and the upper part of the ladder, i.e. the other part of the ladder 12, each have a central slot 14 and a footrest 16. The central slots 14 have a C-shaped profile open to the front. known from DE-C-1 961 757, DE-A-27 36 037 15 and EP-A-0 129 241. The central slot also serves as a guide rail of the gripping device on which the ladder user is secured.

At the upper end of the lower part of the ladder 10, a plate 18 is firmly screwed on the rear side, which slightly protrudes over the butt end of the lower part of the ladder 10 and onto which a tongue 20 is welded. The tongue 20 is provided in a plane defined by the longitudinal axis of the central slot M. The tongue 20 has a flattening 22 at the upper end and an opening 24 in the upper region.

At the lower end of the upper part of the other ladder 12, a plate 26 is also firmly screwed on the rear side 25, which is offset from the end of the next part of the ladder 12 by a degree that it extends over the upper end 18 rearwardly projecting two plates 26 are welded to the plate 26, the lower halves of which are bent at an angle to each other, forming a downwardly open gap 30. Laterally, a spring-loaded snap-in pin 32, which is not shown in detail, is provided on one of the plates. 30 of the spring is pushed into the gap 30 in the locking position. By flattening 22 on the tongue, the snap pin 32 is pushed back when the tongue 20 is inserted into the gap 30. When the tongue 20 reaches its end position in the gap 30 in which the ends of the lower part of the ladder 10 and the other parts of the ladder 12 abut one another, the locking pin 32 snaps into the opening 24.

In the retracted state, the ends of the portions of the ladders 10, 12 abut one another and the tongue 20 is received in the gap 30, the latch pin 32 engaging in the opening 24 of the tongue 20. The play of the tongue 20 in the gap 30 is selected relative to the length of the gap 30 it is possible to tilt forwards and backwards as well as laterally at an angle of about 3 °, without stressing at the connection point.

On the plate 18 there are provided lateral angles 34, which laterally abut against the central slot 14. Further, on the plate 18 below the tongue 20 there is provided a spring-loaded snap-in pin 36, which is intended to prevent unintentional ejection of the co-moving catching device.

Claims (4)

PATENT CLAIMS A device for connecting two parts of a ladder (10, 12) to a single slot (14), each having one central slot (14) and a plurality of steps (16), characterized in that it is provided with a tongue (20) which is arranged at the end of one part of the ladder (10), and by connecting plates (28) which are arranged at the end of the other part of the ladder (12) and between which a gap (30) is provided for receiving the tongue (20). Device according to claim 1, characterized in that the tongue (20) is arranged on the rear side of the central chassis (14) and is arranged in a plane defined by the longitudinal axis of the central chassis (14), and a gap (30) between the connecting plates (28). ) is narrowed in the insertion direction. Device according to claim 1 or 2, characterized in that it is provided with a spring-loaded snap-in pin (32) which latches onto the tongue (20) in the end position of the tongue (20) in the gap (30). Device according to one of Claims 1 to 3, characterized in that the tongue (20) is fastened to a plate (18) which is fastened to the central slot (14) and that the connecting plates (28) are fastened to the plate (18). 26), which is fixed to the central slot (14) of another part of the ladder (12).