FI60055B - STOLPE - Google Patents

Description

ra1 ADVERTISEMENT / “Π Λ C r C] (1) UTLAGGNI NGSSKRI FT 600 5 5 'S v ^ (51) K» .ik.3 / int.ci.3 E 04 H 12/02 FINLAND — FINLAND (21) P * t * nttlh »k * mui - Pat * ntant6knln {2559/73 (22) H * k« mhplhf · —Ameknlnitd ·! 15-08.73 (23) Alkupilvt— GlttlfhatxUf ^ ^ (41) Tullut JulklMlul - Bllvlt,,

National Board of Patents and Registration of ...,,,, ._ 2b.02.74 p— ».οτ, βι (32) (33) (31) Requested Mu <rik« ui — B * jtrd priorltet 25 * 08.72 Sweden-Sverige ( SE) 11016/72 (71) (72) Lars Svensson, Vikingavägen 112, l83 Täby, Sweden-Sverige (SE) (7 ^) Oy Heinänen Ab (5 * 0 Column - Stolpe The present invention preferably relates to a road lighting device, traffic signposts and a column for the like, comprising a sheath and a plurality of stiffening rods connected thereto and cooperating therewith, the rods being adapted together with the sheath connecting them to form a static unit receiving normal stresses.

DE-pate n11iju1 discloses a column consisting of a jacket and internal stiffeners. The stiffening of the column is achieved by placing ropes of fiberglass material in the inner thickenings. The purpose of the construction is to form a rigid column with as little material as possible used. The sheath and the stiffening ropes thus form a functionally inseparable whole.

Finnish patent application 1386/66 discloses a hollow telephone post or flagpole made by laminating on top of a mold crosswise spiral-wound layers of cross-linked strip 1 and reinforced with a metal wire laminated inside the structure. 2,60055 of ribbed reinforcements are attached to the inside of the laminated sheath of the column.

Said known constructions represent the prior art. They have sought to provide a column with high rigidity and withstanding the stresses to which it is subjected.

Driving towards a pole, e.g. a lantern pole, is known to often lead to serious injuries, even death. This is due to the strength of the column and its ability to resist deformation. To date, there has been no satisfactory column structure which, on the one hand, is strong enough to withstand the required loads and, on the other hand, would give in when a vehicle collides with it.

It is an object of the present invention to provide a column in which the above two requirements are met simultaneously. The column is characterized in that the rods and the jacket are intermittently connected to each other and that the joints between them and the jacket are spaced apart or dimensioned so that one or more of them rupture when the local transverse stress exceeds a predetermined value, resulting in static interaction. between the rods and the sheath as well as between the rods with each other ceases and gives way to the columns.

The invention will now be described in more detail by way of example with reference to the accompanying drawing, in which

Figure 1 shows a side view of a column according to the invention.

Figure 2 is a cross-section of the same column taken along line I-I of Figure 1,

Fig. 3 is a longitudinal section on a larger scale of a part of the column wall and

Figure 4 is a cross-section of another column of the invention. ^

The column shown in Figs. The rods as well as the sheath in the illustrated application are made of steel or a similar material. Instead of welded joints, mechanical joints, rivets, screws or the like can also be used in this application.

The welded joints 2 or the like are formed in such a way that they connect the rods via a jacket 3 to a static unit with sufficient rigidity to receive, with a sufficient safety margin, stresses caused by column-supported lighting devices or the like such as a wind load. However, the joints are arranged or dimensioned in such a way that they give up when the column is subjected to a force in the transverse direction, e.g. As a result, the static connection between the rods via the sheath ceases, causing the rods one after the other to receive tension. The result of this is that the column surrenders and compresses without causing a large braking force to be applied to the end-driving vehicle. The column can thus deform under a considerable distance in its longitudinal direction under high tension. It does not necessarily have to be folded over, but its upper part can retain a substantially vertical position despite the fact that its lower part is flattened and is along the ground.

In the embodiment shown in Fig. 4, the rods 1 are arranged externally in a jacket marked with the reference number 3 '.

The welds between the bars and the sheath may be intermittent in the applications shown, i.e. they may be left with spaces.

Embodiments of the invention are not limited to the examples described above and in the drawings, but may vary within the scope of the following claims. Thus, for example, the materials used in a column and the sizing of the column can vary within wide limits.

Claims (3)

A pole, preferably for a road lighting device, traffic planning boards and the like, comprising a sheath (3) and a plurality of connected and cooperating stiffening bars M), the bars (1) being adapted together with the sheath connecting them to form a static unit receiving normal stresses , characterized in that the rods (1) and the jacket (3) are intermittently connected to each other and that the joints between them and the jacket are spaced apart or dimensioned in such a way that one or more of them rupture due to local transverse tension exceeding a predetermined value, whereby the static interaction between the bars and the sheath as well as between the bars with each other ceases and the column gives up. Column according to Claim 1, characterized in that the rods and the jacket consist of materials which can be welded together. Column according to Claim 1, characterized in that the rods are fastened from the inside to the jacket.