US20010013446A1

US20010013446A1 - Scaffolding frame

Info

Publication number: US20010013446A1
Application number: US09/770,037
Authority: US
Inventors: Guenther Krause
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-02-10
Filing date: 2001-01-25
Publication date: 2001-08-16
Also published as: EP1124025A2; DE20002371U1; EP1124025A3

Abstract

A scaffolding frame comprising two parallel posts which are connected by two traverses arranged perpendicularly with respect to the posts. The lower traverse is removably suspended on suspension knobs on the posts. The suspension knobs have a connection which is essentially T-shaped in cross section, whereby the lower traverse has angled brackets at its ends, each of which has a recess therein, which in the upper region is the same as or insignificantly wider than the shank of the T-shaped connection, and in the lower region is the same as or insignificantly wider than the head of the T-shaped connection. The connections extend in the mounted state of the traverse through the recesses. The brackets each have on the outwardly facing surface above the recesses a flange which rests on the upper side of the free end of the suspension knob.

Description

FIELD OF THE INVENTION

The invention relates to a scaffolding frame with two parallel posts which are connected by two traverses arranged perpendicularly with respect to the posts, whereby the lower traverse is suspended on suspension knobs of the posts and is thus removable.

BACKGROUND OF THE INVENTION

Such a scaffolding frame is known from the DE 94 10 743.2. The there disclosed lower traverse has at its ends on both sides upwardly angled brackets. Further console pieces are welded to the outer sides of the ends of the brackets. The lower traverse can then be suspended on the posts of the scaffolding frame through these console pieces. These console pieces are designed such that diagonal bars, spars, boards or other such structural elements can be suspended therefrom.

However, what is disadvantageous in the case of this design is that in order to disengage the lower traverse, as it may be necessary, for example, in order to change the platforms, the structural elements suspended on the console pieces must be removed. Otherwise a disengagement of the lower cross traverse is not possible. This, however, requires additional work for the person erecting the scaffolding since the structural elements must not only be removed but must also be inbetween stored, which can be problematic in particular in the case of higher scaffoldings.

The basic purpose of the invention is therefore to provide a scaffolding frame in which the lower traverse can be exchanged without that further structural elements would have to be disassembled.

This purpose is attained according to the invention by the free end of the suspension knobs each having a connection which is essentially T-shaped in cross section, by the lower traverse having angled brackets at its ends, which brackets each have a recess therethrough, which in the upper area is the same as or insignificantly wider than the shank of the T-shaped connection, and in the lower area is the same as or insignificantly wider than the head of the T-shaped connection, by the connections extending in the mounted state of the traverse through the recesses, and by the brackets having on the outwardly facing surface above the recess a flange which rests on the upper side of the free end of the suspension knob.

In such an inventive scaffolding frame it is possible for the structural elements, like struttings, spars, boards, to be supported directly on the suspension knobs of the posts and not, as this is the case in the state of the art, on the lower traverse. The traverse itself is also suspended on these suspension knobs. If one now disengages the lower traverse, then this can be done directly without that the other structural elements, which are supported on the suspension knob, would have to be disengaged. Thus a quick and simple exchange of the lower traverse is possible.

A screw can be provided as the connection according to the invention. The screw is then screwed into a thread provided in the face of the free end of the suspension knob. A spacing remains thereby between the screw head and the face, which spacing corresponds to the thickness of the bracket. The size of the screw head is advantageously chosen such that same corresponds to the screws mostly used in the scaffolding art.

The bracket can according to the invention be tapered or, however, bent at its free end.

The free end of the suspension knob can have a flange on the upper edge, on which flange rests the flange of the bracket. Furthermore, the flange of the bracket can be bent downwardly at an angle whereby the flange of the bracket grips then behind the flange on the upper side of the suspension knob. The sides of the plate are angled and grip around the lateral surfaces of the suspension knob. It is thereby possible, in order to make lifting out of the traverse easier, to enlarge the inside distance of the bent sections toward the traverse. A further lock against rotation is thus achieved.

Two further suspension knobs can furthermore be mounted on the posts of the scaffolding frame, whereby the first suspension knobs provide for fastening of the lower traverse and the second suspension knobs, mostly of the same outer cross-sectional profile, extend from the fastening point of the suspension knobs on the posts to the free end of the suspension knobs.

The first suspension knobs can advantageously be a simple and inexpensively manufactured U-shaped bent part which has a rectangular contoured center part as a web to which are symmetrically integrally provided two rectangular side parts as legs which are each oriented at approximately 90° with respect to the center part. This bent part is then welded at one end face to the post.

The side parts of the bent part can thereby project according to the invention beyond the free face of the center part. The projecting end pieces are then bent inwardly at 90° so that they close off the outer face. Furthermore, a semicircular recess is provided at the end pieces, namely, in such a manner that both recesses form a circular opening in the outer face. A nut is welded to the inside facing part of this opening, which nut forms the thread for the screw provided as the T-shaped connection.

BRIEF DESCRIPTION OF THE DRAWINGS

One exemplary embodiment for a scaffolding frame of the invention is described in greater detail in connection with the drawings, in which: [0013]
FIG. 1 illustrates a scaffolding frame according to the invention, [0014]
FIG. 2 is a detailed view of the connection between a lower traverse and a post, [0015]
FIG. 3 illustrates a suspension knob, and [0016]
FIG. 4 is a vertical cross-sectional view of the connection between the lower traverse and the post. [0017]

DETAILED DESCRIPTION

A scaffolding frame of the invention has two [0018] posts 1, which are connected at their ends by two traverses 2, 3 (FIG. 1). The lower traverse 3 is thereby suspended, and fastened releasably force-lockingly on the posts and is again removable therefrom. Suspension knobs 8 are for this purpose mounted on the posts 1, into which knobs is suspended the lower traverse 3. The suspension knobs are thereby each formed by one U-shaped bent part 9.
Two [0019] side parts 10 forming the legs of the U-shaped bent part 9 are symmetrically integral with the center part of the bent part 9, which center part forms a web (FIG. 3). The legs are thereby bent in the same direction at 90° with respect to the center part 9. The bent part 9 is welded at one end face to the post 1. The side parts project downwardly from the center part 9 on the opposite face of the suspension knob 8. Projecting end pieces 11 of the side parts 10 are bent inwardly at 90°. Semicircular recesses are provided in the end pieces 11, which recesses form together a circular opening in a closed face of the bent part 9. A nut 15 is mounted to an inside face of the end pieces 11 of the bent part 9, into which nut a screw 7 is screwed. This screw 7 forms a T-shaped connection at the outside face of the suspension knob 8. A flange 13 is formed on the upper edge of the suspension knob 8 by bending the outside end of the web 9. Furthermore, the bottom edges of the side parts 10, which are located remote from the bends between the side parts 10 and the center part 9, are bent inwardly at 90°.
The [0020] lower traverse 3 has at its ends brackets which are angled upwardly at 90° (FIGS. 2, 4) relative to the extent of the traverse. These brackets each have a recess 5, 6 which has a width in its lower region 5 which corresponds approximately to the width of the head of the screw 7. Whereas the recess is in the upper region 6 approximately as wide as the shank of the screw 7. The free ends of the brackets 4 are spaced farther from one another than the regions of the brackets 4 where they are connected to the ends of the center piece of the traverse 3. Consequently, the lower regions of the brackets lie, with reference to the traverse 3, closer together than their upper regions. The spacing between the lower regions 5 of the recess 5, 6 from the end of the traverse 3 is thereby dimensioned such that the traverse can be suspended by two suspension knobs 8 on the opposite posts without requiring the screw 7 to be completely removed. The traverse if thereby initially placed above the suspension knobs such that the heads of the screws 7 project into the lower areas 5 of the recesses 5, 6. The shanks of the screws 7 extend now through the upper region 6 of the recess. A permanent (but releasable) positive connection between the traverse and posts 1 is created by tightening of the screws 7.
The [0021] suspension knobs 8 and also further suspension knobs 16 mounted on the posts 1 can be used to support boards, railings or cross-struttings. When a lower traverse 3 must now be exchanged and, for example, a board be supported on the suspension knobs 8, the board must not, as this is the case in the state of the art, first be removed, rather the lower traverse 3 can be directly removed from the scaffolding frame. The screws must for this purpose not be unscrewed but must merely be loosened.
The cut away [0022] part 14 of the suspension knobs make lifting out of the platforms easier.

Claims

What is claimed is:

1. A scaffolding frame comprising two parallel posts which are connected by two traverses arranged perpendicularly with respect to the posts, whereby the lower traverse is suspended on suspension knobs of the posts and is thus removable, wherein the free end of the suspension knobs each have a connection which is essentially T-shaped in cross section, the lower traverse having angled brackets at its ends, said brackets each having a recess therein, which in the upper region is the same as or insignificantly wider than the shank of the T-shaped connection, and in the lower region is the same as or insignificantly wider than the head of the T-shaped connection, the connections extending in the mounted state of the traverse through the recesses, and the brackets each having on the outwardly facing surface above the recess a flange which rests on the upper side of the free end of the suspension knob.

2. The scaffolding frame according to

claim 1

, wherein a screw is provided as the T-shaped connection, wherein the face of the free end of the suspension knobs has a thread, and wherein the screw is screwed into this thread.

3. The scaffolding frame according to

claim 1

, wherein each bracket is tapered at its free end.

4. The scaffolding frame according to

claim 1

, wherein each bracket has an S-shape.

5. The scaffolding frame according to

claim 1

, wherein the free end of the suspension knobs has a flange on the upper side, on which flange rests the flange of the bracket.

6. The scaffolding frame according to

claim 1

, wherein the flange of the brackets is bent downwardly at an angle and grips behind the flange on the upper side of the suspension knobs.

7. The scaffolding frame according to

claim 1

, wherein two second suspension knobs are mounted on the posts of the scaffolding frame, and wherein the first mentioned and the second suspension knobs have mostly the same outer cross-sectional profile which extends from the fastening point of the suspension knobs on the posts to the free end of the suspension knobs.

8. The scaffolding frame according to

claim 7

, wherein each suspension knob is a U-shaped bent part which has a continuous and essentially rectangular center part as a web on which are mounted symmetrically two essentially rectangular side parts as legs which are each bent at approximately 90° with respect to the center part, and wherein the bent part is welded with one of its faces to the post.

9. The scaffolding frame according to

claim 8

, wherein the side parts project at the free face the center part, wherein projecting end pieces are bent inwardly at 90° and close off the face, wherein a semicircular recess is provided at the free end edges of the side parts, wherein both recesses form an essentially circular opening in the face, and wherein a nut is mounted on the inside of the opening, which nut forms the thread for the screw provided as the T-shaped connection.

10. The scaffolding frame according to

claim 8

, wherein the side parts are disengaged in the area of the bent edge.

11. The scaffolding frame according to

claim 8

, wherein the side parts are bent at their lower ends and lie approximately at 90° with respect to one another.

12. The scaffolding frame according to

claim 1

, wherein each bracket is bent at least in the upper area at approximately 90° toward the end of the traverse.

13. The scaffolding frame according to

claim 1

, wherein the inside spacing between the bent section of the bracket is equal to or slightly larger than the width of the knob.

14. The scaffolding frame according to

claim 13

, wherein the inside spacing between the lateral bent sections increases toward the traverse.