CN111344466A

CN111344466A - Horizontal cross bar

Info

Publication number: CN111344466A
Application number: CN201880066896.XA
Authority: CN
Inventors: 托拜厄斯·斯特克; 阿尔弗雷德·赖兴斯伯格
Original assignee: Peri GmbH
Current assignee: Peri Europe; Peri SE
Priority date: 2017-10-16
Filing date: 2018-10-16
Publication date: 2020-06-26
Anticipated expiration: 2038-10-16
Also published as: ES2924334T3; DE102017218472A1; PL3697980T3; ZA202002514B; CN111344466B; EP3697980B1; WO2019076854A1; EP3697980A1

Abstract

The invention relates to a horizontal crossbar (2) for horizontally connecting two scaffold uprights (7) of a scaffold (1), having a middle section (4) and two heads (5) built on one end each of the middle section (4), wherein the heads (5) are adapted to be hooked into hooking areas (8) of one of the scaffold uprights (7). Wherein at least one of the heads (5) is designed as a deep-drawn part and/or the intermediate part (4) and at least one of the heads (5) are integrally produced together from a bent sheet metal part (40).

Description

Horizontal cross bar

Technical Field

The present invention relates to a horizontal crossbar (i.e. scaffold crossbar) for horizontally connecting two scaffold uprights of a scaffold, for example a construction scaffold, having a middle section and two heads built on one end of the middle section, wherein the heads are adapted to be hooked into a hooking and locking area of one of the scaffold uprights.

Background

Scaffold rails are an essential component of scaffolds, as are used as work platforms in the construction field, for fastening formworks or as protection devices. Scaffold crossbars typically have a tube as the middle section, with the head made as a casting or forging and fastened to the end of the tube.

But the cast or forged head is heavy and relatively brittle in terms of its material properties. Furthermore, the welding of the head to the intermediate portion is difficult or impossible to achieve. This leads to high production costs and, in the case of poor handling, may lead to insufficient fracture resistance of the known scaffolding crossbar.

Disclosure of Invention

In view of the above, it is an object of the present invention to provide a horizontal rail which reduces the disadvantages of the prior art, wherein an improved operability should be achieved with lower manufacturing costs.

The solution of the invention to achieve the above object is a horizontal cross-bar having the features given in claim 1. Advantageous developments of the invention are indicated in the dependent claims and the description.

The horizontal ledger of the invention for horizontally connecting two scaffold uprights of a scaffold has a middle section and two heads built on one end each of the middle section, wherein the heads are adapted to hook into the hooking areas of one of the scaffold uprights. According to the invention, at least one of the two heads is designed as a deep-drawn part and/or the intermediate part and at least one of the heads are jointly produced in one piece from a bent sheet metal part. In particular, the two heads, or one of the two heads, can be embodied as a deep-drawn part, and the horizontal transverse bar can be produced in one piece from a bent sheet metal part. For this purpose, deep drawing may be performed on the region of the bent sheet member for forming the head portion before the bent sheet member is bent into the shape of the horizontal cross bar. A bent sheet member refers to a unitary sheet structure in the form of a sheet having a plurality of sections, e.g., sawn or net cut (blanked), adapted to form different regions, e.g., back, side, or head surfaces, and into the shape of a horizontal rail by bending.

The cast or forged head of a conventional horizontal rail can be replaced with a lighter embodiment by means of the horizontal rail of the invention. Lighter embodiments provide for increased fracture resistance of the head while also reducing weight. The bent sheet piece and the deep-drawn piece may be made of, for example, a 4mm thick steel plate, thereby enhancing fracture resistance. The deep-drawn member refers to a sheet member formed by deep drawing. Deep drawing refers to the drawing and pressure forming of a sheet, for example a steel sheet, in a hollow body which is open on one side, without the thickness of the sheet being changed deliberately. In this process, the sheet is pressed into the hollow body by means of a punch, so that the sheet has the surface shape of the hollow body serving as a matrix. Both the bent sheet element and the deep-drawn element are suitable for welding to each other or to other steel elements. This allows the horizontal rail of the present invention to be manufactured at a very low cost compared to the manufacturing processes used in conventional horizontal rails, wherein in particular the material costs and the welding costs are low. Furthermore, a horizontal crossbar may be provided with only minor manufacturing tolerances.

In order to ensure the use of the horizontal ledger of the invention on scaffolding, the horizontal ledger advantageously has in the region of the head a wedge in each case, which serves to fix the head in its preset mounting position in/on in each case one of the hook-lock regions of the scaffolding upright.

The loose head made as a deep-drawn part can be welded to the intermediate part on one of its ends, respectively. Furthermore, the abutting edge regions of the bent sheet metal parts can be welded to one another. The horizontal transverse bar is thus produced as a bent sheet part and is connected to the edge of the bent sheet part by means of a weld seam. This results in a reduction of components and a reduction of the welding costs, wherein welding, in particular welding of the head, which is produced loosely and is embodied as a deep-drawn part, can be carried out by laser welding.

In the case of both heads embodied as deep-drawn parts, a symmetrical embodiment of the horizontal crossbar of the invention is achieved. The intermediate part can be designed in particular as a hollow tube, in particular with a rectangular or square cross section, so-called square tube. However, according to the invention, the intermediate section can also be designed as a U-profile, so that further material savings are achieved.

According to the invention, the deep-drawn parts can each have an abutment region for abutment against a respective one of the scaffold uprights and each have an opposite region for forming an opposite face for the wedge, respectively, so that the stability of the horizontal ledger of the invention is increased.

An embodiment of the horizontal transverse bar according to the invention, in which the central part and the two heads are jointly produced in one piece from a bent sheet metal part, is likewise symmetrical. The bent sheet metal part has a substantially rectangular rear side which determines the distance between the scaffold uprights to be connected, wherein a side face is provided on each of the longitudinal edges of the rear side, and the side faces have projections for forming heads on the end regions thereof. These projections may be segments or they may be formed into heads by deep drawing. The curved sheet metal part has in particular two sections for forming in each case one counter surface for a wedge. In one embodiment, these partitions can be formed on a respective one of the edges of the intermediate portion forming the narrow side of the rear face of the intermediate portion, or in another embodiment on at least one of the edges of the side faces.

The horizontal ledger of the invention is suitable for use in supporting a scaffold having two scaffold uprights, wherein the horizontal ledger connects the scaffold uprights in a supporting manner in their preset installation position. The scaffold uprights advantageously have latching regions, in each of which a respective one of the heads of the horizontal crosspiece is latched in such a way that the scaffold uprights are connected horizontally by means of the horizontal crosspiece.

The hooking areas can in particular be formed by flower-shaped plug-in discs (Rosetten) with hooking openings fastened to the scaffold uprights. In the case of the horizontal ledger of the invention having in the region of its heads one in each case for fixing the head in one in each case of the hook-and-lock regions of the scaffold upright, the head can be fixed in position in the hook-and-lock region of the flower receptacle by means of wedges.

Drawings

The advantages of the invention are described in the specification and the attached drawings. The embodiments shown and described are not intended to be exhaustive or to be exemplary in nature, and are provided for illustration of the invention.

The invention will be elucidated with reference to the embodiments shown in the drawings.

In the figure:

FIG. 1 a: a perspective view of a section of a scaffolding with a horizontal ledger of the invention, made in one piece from a curved sheet piece;

FIG. 1 b: a sectioned perspective view of a scaffolding with a horizontal ledger of the present invention according to another embodiment, the horizontal ledger being integrally made of a curved sheet piece;

FIG. 1 c: a sectional perspective view of a scaffolding with horizontal ledgers of the invention, the heads of which are each constructed as a deep-drawn part;

fig. 2a to c: fig. 1a to 1c show a longitudinal section through the scaffolding area; and

fig. 3a and 3 b: shown in expanded view are the curved sheet members used to make the horizontal rails of figures 1a and 1b, respectively, of the present invention.

Detailed Description

Fig. 1a to 1c each show a perspective view of a subsection of a scaffold 1 with a horizontal ledger 2 according to the invention. The horizontal bars each have a middle section 4, which is provided with heads 5 at both ends.

The horizontal transverse rods 2 shown in fig. 1a and 1b are each embodied as an integral bent sheet metal part. Thus, the middle portion 4 and the head 5 of the horizontal cross bar 2 are made from a single sawn sheet by bending into the shown shape of the horizontal cross bar 2.

In the horizontal crossbar 2 shown in fig. 1c, the two heads 5 of the horizontal crossbar 2 are each constructed as a deep-drawn part welded to the end of the middle section 4.

In order to better see the shape of the heads 5, only one scaffold upright 7 is shown in each case, with one respective hook in the head 5 of the respective horizontal crossbar 2 being latched into a respective latching region 8 of this scaffold upright. In the case of a horizontal crossbar 2 for supporting a scaffold, the free head shown is likewise hooked into the hooking and locking region 8 of another scaffold upright 7. The horizontal ledger 2 is adapted to thus connect together two scaffold uprights 7 of the scaffold 1. The two scaffold uprights 7 have latching regions 8, wherein in each case one of the heads 5 of the horizontal crosspiece 2 is latched in one of the latching regions 8 in such a way that the scaffold uprights 7 are connected horizontally by means of the horizontal crosspiece 2.

The middle portion 4 of the horizontal rail 2 extends in the direction of the longitudinal axis L of the horizontal rail 2. The two heads 5 of the horizontal crosspiece 2 are each formed at one axial end of the central part 4. The head 5 is shaped so that it is adapted to hook into the hooking zone 8 of a respective one of the scaffold uprights 7. In the region of the head 5, a wedge 11 is arranged in each case for fixing the head 5 in a respective one of the latching regions 8. The wedge 11 passes through an opening 12 in the end side 14 of the horizontal rail 2. That is, the opening 12 forms a through hole for the wedge 11. The hooking zone 8 is formed by a flower-shaped insert plate 16 with hooking openings 17 fastened to the scaffold upright 7. In its installed state, the head 5 is fixed in position on the scaffold upright by means of a wedge 11 in the region of the catch 8, i.e. in a respective one of the catch openings 17. Each of the flower-shaped plug disks 16 arranged annularly around the associated scaffold upright 7 has a plurality of, in this case four, openings which each form a hook opening 17 for the head 5 of the horizontal crossbar 2.

In the horizontal crossbar 2 of fig. 1a to 1b, the central part 4 and the two heads 5 are jointly integrally produced from a bent sheet metal part. The bent sheet-metal part has a substantially rectangular rear face 14 which determines the distance between the scaffold uprights 7 to be connected. A side face 20 is provided on each longitudinal edge of the rear face 14. These side faces 20 have projections 21 on their end regions for forming the head. In fig. 1a to 1c, only one of the side faces 20 is visible in each case, since the second side face is covered in the perspective view.

The curved sheet metal parts each have two sections 23 for forming one respective opposite face for the wedge 11. The partial regions 23 are likewise only visible in each case in the figures due to the perspective view.

In fig. 1a, the partial regions 23 are formed on a respective one of the edges of the side faces 20. The abutting edge regions of the bent sheet metal parts can be welded to one another.

In the embodiment of the horizontal rail 2 of fig. 1b of the invention, the counter-surface-forming partitions 23 are formed on a respective one of the edges of the middle part 4 forming the narrow side of the back surface 14 of the middle part 4.

In the horizontal crossbar 2 of fig. 1c, the two heads 5 are constructed as deep-drawn parts. The middle portion 4 is shaped as a hollow tube with a rectangular cross section. The deep-drawn parts forming the head 5 each have an abutment region 30 for abutment against a respective one of the scaffold uprights 7 and each have an opposite region 31 for forming an opposite face for the wedge 11. The head parts 5 are welded to the intermediate part 4 by a weld 34 on one of the ends of the intermediate part 4.

Fig. 2a to 2c show a longitudinal section through the scaffolding area 1 shown in fig. 1a to 1 c. The profiles extend in each case along the longitudinal axis L and in the direction of the hooking of the head 5, i.e. parallel to the scaffold upright 7, with in each case one of the heads 5 hooking into the flower-shaped insert 16 of the scaffold upright. The wedge 11, which is introduced through the through-hole 12 into the upper rear face 14 of the middle section 4 of the horizontal cross-bar 2, extends in cross-section. The wedges 11 wedge together a respective one of the opposing faces 35 of the head 2 with an opposing face 36 of the flower insert 16.

Fig. 3a and 3b show an expanded view of a curved sheet member 40 used to make the horizontal rail of fig. 1a and 1b of the present invention, respectively. These developments are in the form of a cut-out of a sheet, i.e. a thin slab, which is bent into the shape of the horizontal cross-bar of the invention as shown in fig. 1a and 1 b.

The expanded view shown in fig. 3a is a cut-away of the horizontal cross bar shown in fig. 1a, and the expanded view shown in fig. 3b is a cut-away of the horizontal cross bar shown in fig. 1 b. The developed view has a substantially rectangular rear side 14 which determines the distance between the scaffold uprights to be connected, wherein a side 20 is formed on each of the two longitudinal sides of the rear side 14, and the side 20 has a projection 21 for forming a head at its end region.

The developed views each have two sections 23 for forming one respective opposite face for the wedge. In the embodiment of the horizontal rail of fig. 1b of the present invention, the counter-surface forming partitions 23 are formed on a respective one of the edges of the middle portion forming the narrow side of the back surface 14 of the middle portion. In the embodiment of the horizontal rail of fig. 1a of the present invention, the partitions 23 are formed on respective ones of the edges of the side faces 20. In addition, the through-hole 12 for the wedge can be seen in the back face 14.

Claims

1. A horizontal ledger (2) for horizontally connecting two scaffold uprights (7) of a scaffold (1) having a middle section (4) and two heads (5) built on one end each of the middle section (4), wherein the heads (5) are adapted to be hooked into a hooking zone (8) of one of the scaffold uprights (7) each,

it is characterized in that the preparation method is characterized in that,

at least one of the heads (5) is designed as a deep-drawn part, and/or at least one of the intermediate part (4) and the heads (5) is integrally produced together from a bent sheet metal part (40).

2. The horizontal crossbar according to claim 1, characterized in that a wedge (11) is arranged in the region of the head (5) for fixing the head (5) in a respective one of the hooking areas (8).

3. The horizontal cross-bar according to any one of claims 1 to 2, wherein the heads (5) are welded to the intermediate portion (4) at one of the ends of the intermediate portion (4) and/or to each other at the abutting edge regions of the bent sheet element (40), respectively.

4. The horizontal crossbar according to any one of claims 1 to 3, wherein the two heads (5) are constructed as deep-drawn pieces.

5. The horizontal crossbar according to claim 4, wherein the middle portion (4) is constructed as a hollow tube, in particular having a rectangular or square cross section.

6. The horizontal ledger of any one of claims 1 to 5, characterized in that the deep-drawing pieces each have an abutment region (30) for abutment against a respective one of the scaffold uprights (7) and each have an opposite face region (31) for forming an opposite face (35) for the chock (11), respectively.

7. The horizontal cross-bar according to any one of claims 1 to 3, wherein the intermediate portion (4) and the head portion (5) are jointly made in one piece from one bent sheet element (40).

8. The horizontal transverse bar according to claim 7, wherein the bent sheet-metal parts (40) have a substantially rectangular rear side (14) which determines the distance between the scaffold uprights (7) to be connected, wherein a side face (20) is provided on each of the longitudinal edges of the rear side (14), and wherein the side face (20) has a projection (21) at its end region for forming the head (5).

9. The horizontal crossbar according to any one of claims 7 to 8, wherein the curved sheet element (40) has two sections (23) for forming one respective opposite face (35) for the wedge (11).

10. The horizontal rail according to claim 9, characterized in that the partitions (23) are formed on a respective one of the edges of the middle part (4) forming the narrow side of the back face (14) of the middle part (4), or the partitions (23) are formed on at least one of the edges of the side faces (20).

11. A scaffold (1) having two scaffold uprights (7) and a horizontal crossbar (2) according to any one of claims 1 to 10, wherein the scaffold uprights (7) have hooking-locking regions (8), a respective one of the heads (5) of the horizontal crossbar (2) being so hooked into one of the hooking-locking regions (8) that the scaffold uprights (7) are horizontally connected by means of the horizontal crossbar (2).

12. Scaffolding according to claim 11, characterized in that the hooking zone (8) is formed by a flower-shaped insert plate (16) with hooking openings (17) fastened on the scaffolding upright (7).

13. Scaffolding according to any of the claims 11-12, characterized in that the horizontal ledger (2) is built according to claim 2, wherein the head (5) is fixed in position within the hooking zone (8) by means of the wedge (11).