FR2507660A1 - Light metal fence post for metal grills - has combined sections forming reinforcement for resistance to buckling - Google Patents

Abstract

The fence post (1) has a section made by a combination of T shaped part (7) and an open beam (8) attached to the free end of the middle branch of the T. The beam is of trapezoidal section, the small base (9) of the trapezoid being connected at its centre to the free end of the middle branch (11) of the T. An opening (12) is situated at the central part of the large base of the trapezoid. On the central web of the post are holes (13) that are regularly spaced and which take horizontal stay tubes (3) to support the metal grill.

Description

 The invention relates to a fence post and more particularly to a metal fence post of the type which is generally used to support and tension wire fences.

 The current trend is to seek to make posts out of light metal, such as aluminum. However, the mechanical resistance to buckling is insufficient and it is necessary in such cases, with known posts with a T or I section, to provide struts.

 The post according to the present invention avoids this drawback. To this end, it is characterized by its section constituted by the combination of a T-section and an open beam section attached to the free end of the middle branch of the T.

 According to a preferred characteristic of the invention, the open beam-shaped part of the post is of trapezoidal section, the small base of the trapezium being connected to the end of the T substantially in its middle and the large base being open in the middle.

 The section of this new post avoids the use of struts, the buckling resistance being conferred by the combination of the T with the added part which works in beam.

Other characteristics and advantages of the invention will emerge from the description which follows of an example embodiment of a post according to the invention with reference to the appended drawing, in which
Figure I is an elevational view of a fence mounted using poles according to the invention.

 Figure 2 is a perspective view from above associated with a post according to the invention / with a tensioning tube and sheet piles.

 Figure-3 is a partial perspective view of the top of a post according to the invention associated with a tensioning tube and provided with flap adaptation holes.

 Figure j is a sectional view of a post according to the invention.

 In Figure 1, we see a fence made using stakes 1 according to the invention The mesh 2 is fixed to the stakes 1 and on the tensioning tubes 3. Each stake 1, at the end of its part pressed into the ground has a sole 4. The ground level is represented by the line 5. Sheet piles 6, preferably made of concrete, are held between the stakes 1 and rest on the ground.

 For a fence with a height of around 2.60 m, the spacing between the stakes 1 is around 2.00 m and the spacing between the tensioning tubes around 0.75 m.

 In accordance with the invention, each stake 1 is a metal profile comprising a T-shaped part 7 to which a part in the form of an open beam 8 is connected.

Preferably, this part 8 is of trapezoidal shape. Part 8 is secured by the middle of its face 9 (small base) opposite its open face 10 (large base), with the free end of the middle branch 11 of the T forming the core of the stake.

The opening 12 of the part 8 is located substantially in the middle of the face 10. At the base of the stake is fixed a sole 4.

 Thus constituted, the stake 1 makes it unnecessary to add struts, as is the case with current metal stakes. Indeed, the combination of T 7 and part 8 working in beam gives the stake sufficient mechanical buckling resistance.

 On the other hand, in addition to its stiffening function, the part 8 in the form of an open beam serves as a protective sheath, in particular for the passage of electrical conductors or cables.

This characteristic is particularly useful in the case of electrified fences comprising at their upper part a flap supporting the electrified conductors.

 It can also serve as a guide and support for the adaptation of detection, protection or other devices.

Another advantageous advantage of the post according to the invention lies in the fact that the rebate formed between the transverse branch of the T or core 11 of the T and the small base 9 of the beam-shaped part 8 can be adapted in view of the reception of a reinforced concrete sheet pile 6. In the irons in
I currently known, the distance between the branches of the I is necessarily large due to the required regidity. With the post according to the invention, because of the part 8 in the form of a beam, the width of the core li can be reduced, which allows direct reception of reinforced concrete sheet piles whose standardized thickness is generally between 40 and 50 mm.

As an indication, the dimensions of the section of a post according to the invention can be as follows
- transverse branches of the T: 50 mm,
- height of the T: 50 mm,
- height of the part in
beam shape: 30 mm,
- small beam base: 35 mm,
- large beam base: 50 mm,
- opening width: 20 mm.

 Holes 13 are made in the core 11 of the post for the passage of the tensioning tubes 3.

 In addition, in the case of electrified flap fences, the core 11 may include additional holes 14 for fixing profiles supporting said flap.

 According to another aspect of the invention, it is possible, using posts of sufficient height, to form directly, from the post, the support of the flap.

For this purpose, we cut the core of the post at the limit between this core and the small base of the beam, on the necessary height, we remove on this height the beam-shaped part and we fold the remaining T part to form a bavo let support.

Claims (6)

 1. Fence post characterized in that its section is constituted by the combination of a T-shaped part (7) and an open beam-shaped part (8) attached to the free end of the middle branch (11 ) of T.  2. Pole according to claim 1, characterized in that the open beam-shaped part ~ (8) is of trapezoidal section, the small base (9) of the trapezium being connected to the free end of the middle branch (11) of the T substantially in the middle and the opening (12) being located substantially in the middle of the large base.  3. Post according to claim 1 or 2, characterized in that it has holes (13) on its core (11) - regularly spaced for the passage of tensioning tubes (3).  4. Pole according to any one of claims 1 to 3, characterized in that it comprises on its core, at its upper part, holes (14) for the attachment of flap supports.  5. Post according to any one of claims 1 to 4, characterized in that the dimensions of its section are - transverse branch of the T: 50 mm,  - height of the T:: 50 mm,  - height of the part in  beam shape:: 30 mm,  - small base of the part in  beam shape: 35 mm,  - large base of the part in  beam shape: 50 mm,  - width of the opening: 20 mm.  6. Method for obtaining a post provided with an integrated flap support from a post according to any one of claims 1 to 5, characterized in that the desired height of the post is cut out at the limit between the core (11) and the small base (9) of the beam, we remove the part (8) in the form of a beam on the cutting height and we fold the remaining T-shaped part (7) according to the desired angle and direction.