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WO1999031337A1 - Element structurel en plastique et ensemble structurel comprenant au moins un element structurel en plastique - Google Patents

Element structurel en plastique et ensemble structurel comprenant au moins un element structurel en plastique Download PDF

Info

Publication number
WO1999031337A1
WO1999031337A1 PCT/BR1997/000071 BR9700071W WO9931337A1 WO 1999031337 A1 WO1999031337 A1 WO 1999031337A1 BR 9700071 W BR9700071 W BR 9700071W WO 9931337 A1 WO9931337 A1 WO 9931337A1
Authority
WO
WIPO (PCT)
Prior art keywords
post
structural
apertures
plastic
structural element
Prior art date
Application number
PCT/BR1997/000071
Other languages
English (en)
Inventor
Fernando Carlos De Castro
Original Assignee
De Castro Administração E Participações Ltda.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by De Castro Administração E Participações Ltda. filed Critical De Castro Administração E Participações Ltda.
Priority to AU53963/98A priority Critical patent/AU5396398A/en
Priority to PCT/BR1997/000071 priority patent/WO1999031337A1/fr
Publication of WO1999031337A1 publication Critical patent/WO1999031337A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00—Fencing, e.g. fences, enclosures, corrals
    • E04H17/02—Wire fencing, e.g. made of wire mesh
    • E04H17/10—Wire fencing, e.g. made of wire mesh characterised by the way of connecting wire to posts; Droppers
    • E04H17/12—Wire fencing, e.g. made of wire mesh characterised by the way of connecting wire to posts; Droppers the wire being placed in slots, grooves, or the like

Definitions

  • the present invention relates to a structural element, particularly useful as a plastic fence post, and a system for driving it into the ground.
  • a structural element particularly useful as a plastic fence post
  • Such an element is used for fencing off fields, enclosing animals and to serve as a building skeleton.
  • Fence posts of the prior art basically comprise an elongated body to be driven into the ground, herein designated as the post body, and which is generally provided with through apertures or slots for passing wires through.
  • a post body may be made of wood, metal, concrete or plastics, the latter being preferable due to its advantages with respect with low cost and also by virtue of the simplicity in mounting, greater durability, insulation against electric discharges and other advantages.
  • the post body there are other devices which are necessary for mounting the post, namely the post driver for driving the post into the ground, clamps for securing the wires to said post body, etc.
  • GB 1402481 shows a hollow plastic post which replaces known wooden, concrete or steel posts. Also a driving cap is provided, which assists in driving the post body into the ground, preventing it from being damaged. Since the post body is hollow, it may be filled with concrete or any other substance in order to give it greater strength. A drawback of this post is that its body has low tensile strength, if it is not filled with a reinforcing substance. This filling causes the post to become more resistant, but the act of filling the post with concrete or another substance is troublesome and time-consuming, which makes labour expensive.
  • US 4070007 discloses an injection-moulded plastic post having high tensile strength and excellent durability. In addition, it also has lugs for securing either ordinary or barbed wires. US 4070007 does not show the way in which the post is driven into the ground, nor the apparatus for this purpose. Thus, the post might be driven into the ground and mounted with equipment which might not be appropriate or could damage it or not fix it properly.
  • FR 2568926 discloses a plastic post which serves for both fencing off fields and supporting vines and other kinds of plants, besides supporting straw coverings for vines and orchards.
  • This known plastic post can be provided with a metallic point to facilitate insertion in the soil.
  • DE 3316790 discloses a post made of plastic with cross-shaped, star-shaped, triangular or square sections, which is resistant to atmospheric influences, corrosion and UV radiation. In addition, it has a tapered end to penetrate the ground easily. An apparatus for driving it is not disclosed.
  • DE 35017746 refers to a plastic post having a more or less oval or cross-shaped body, which has holes for passing wires through. Due to its large thickness, this post has the drawback of being heavier than other known posts, which entails a greater difficulty in transportation and greater costs in manufacturing.
  • US 3955801 and US 4540160 disclose pre-fab cated fences made of plastic posts provided with slots for receiving one end of plastic rails.
  • US 4702459 discloses a fence assembly including fence posts which are provided with pockets adapted to receive ball shaped sockets disposed at each end of a crossrail in order to allow for inclined positioning of such crossrails to satisfy ground contour conditions.
  • plastic posts or plastic fence assemblies of the prior art a common disadvantage relies in that plastic posts have a limited mechanical resistance due to their constant cross section, which is probably due to a preferred manufacturing process by extrusion.
  • each post of the prior art is more or less specifically designed for certain purposes, such as to permit construction of wire fences or rail fences, a complete modular assembly allowing several configurations not being provided.
  • posts which are located at the ends of a fence may act as tensioning posts, that is to say, posts which serve for tensioning the wires, which posts shall be properly anchored by means of a prop.
  • the cited documents do not disclose any specific element for engaging with such a prop.
  • the object of the instant invention relies in eliminating the above drawbacks of the known plastic posts and to provide a structural element with enhanced mechanical resistance and an assembly which can be used either for wired fences - whether smooth or barbed wires - or for fences of crossrails.
  • Another object of the present invention is to provide a system of structural elements, particularly a plastic post system which is easier to drive into the soil than those of the prior art.
  • a further object of the present invention is to provide a structural element which may be of various shapes, preferably L-shaped, T- shaped and cross-shaped.
  • Still another objective of the invention is to provide a post which can penetrate in hard soils with reduced risk of breaking its the lower end.
  • Another object of the invention is to provide a post head protection cap, which will serve for any post having an "L”, “T”, “H” or cross shape section.
  • Another object of the invention is to provide a support for crossrails or boards, so that they can be positioned on any type of ground, irrespective of the slope.
  • a plastic structural element having an elongated body formed by at least two plate portions joined along one edge thereof and forming an angle between them, said element having an upper end and a lower end and being provided with through apertures and slots distributed along the element, said slots extending from one free edge of one of the plate portions, said apertures and slots being adapted for the passage of several parallel extending wires or barbed wires, said lower end of the element being tapered as to facilitate penetration on the soil, whereby transversal reinforcing crossbars are provided along the element joining said plate portions.
  • a structural assembly comprising at least one plastic structural element further includes a tip provided at said lower end of the structural element and being made of a material which is more resistant than that of the structural element.
  • the structural element or post of the present invention is easy to handle, by virtue of the fact that it is made in a massive way from plastics of high tensile strength, as well as a complete system for installing it very easily and rapidly. In this way, an excellent tensile strength is achieved, without the need for adding structures or substances inside the post body for this purpose.
  • the present invention also suggests a complete post system which, in addition to having through apertures and slots for passing the wires though, is provided with devices for use in installing crossrails or fencing boards, which are widely used by breeders of horses or other animals.
  • posts in accordance with the present invention may have a re- movable metallic tip for facilitating mounting of the structural element, without the drawback of having exposed pointed ends and also to prevent the post from breaking while it is being driven into the ground.
  • the invention also provides an equipment to be used for driving the post.
  • a device is provided which allows an ordinary post to become a tensioning post.
  • FIG. 1a is a front view of a first preferred embodiment of a structural element, particularly an L-shaped post, the metallic tip of which is cast onto the post body;
  • FIG. 1 b is a top view of the L-shaped post, where the reinforcing crossbar of the post sides can be seen;
  • - figure 1c is a side view of the L-shaped post, the metallic tip of which is cast onto the post;
  • FIG. 2a shows a front view of a second preferred embodiment of the structural element, particularly an T-shaped post with the metallic tip cast onto the post;
  • FIG. 2b shows a top view of the T-shaped post, where the reinforcing crossbar joined to the walls of the post can be seen;
  • - figure 2c shows a back view of the T-shaped post with the metallic tip cast onto the post
  • - figure 2d shows a side view of the T-shaped post with the metallic tip cast onto the post
  • FIG. 3a shows a front view of the prop-supporting plate for a tensioning post
  • FIG. 3b shows a side view of the prop-supporting plate for a tensioning post
  • FIG. 4a shows a front view of a board support
  • FIG. 4b shows a side view of a board support
  • FIG. 5a shows a perspective view of a crossrail or fence board
  • FIG. 5b shows a side view of the board
  • FIG. 6a shows a perspective view of a post head protection cap
  • FIG. 6b shows a cross-section view of the post head protection cap
  • FIG. 6c shows a bottom view of the post head protection cap
  • FIG. 7 shows a perspective view of a post driver
  • FIG. 8 shows, in perspective, a third embodiment of the structural element, in which the post is L-shaped, with a detachable tip and elliptical apertures for passing smooth wires through and coupling to another structural element;
  • FIG. 9 is a perspective view showing the removable tapered tip of the L- shaped post
  • FIG. 10 schematically shows the coupling of two L-shaped structural elements when used for the construction of structures
  • FIG. 11 shows a perspective view of a fourth embodiment, where the post is
  • T-shaped and has a detachable tip
  • - figure 12 shows a tapered tip removable form the T-shaped post.
  • the L-shaped post body 1 has plate walls 2 with through apertures 3 for the passage of smooth wires and slots 4 for the passage of barbed wires.
  • a metallic tip is provided at one end of this post so as to facilitate penetration into the ground.
  • This metallic tip is tapered at a junction 5, so that the metal and the plastic can join to form a single body.
  • the through apertures 3 and slots 4 for the passage of the respective wires are provided in the two walls 2 of the post, at a distance which does not impair the tensile strength of the post body.
  • This also enables the placing of wires on either or both sides.
  • the oblique slots 4, essentially in form of an inverted "Y" for fixing barbed wire is made so as to ensure that the wire remains as secure as possible.
  • Reinforcing crossbars 6 can be seen on figures 1 b and 1c, which prevent easy torsion of the post, thus increasing its rigidity.
  • a further embodiment of the post is shown in figures 2a to 2d.
  • wires are passed through apertures 3 and slots 4 provided in the leg portion of the "T" (figure 2d), i.e. on wall 12, while additional rows of through apertures 9 are provided in the upper portion of the "T", i.e. on wall 8, for receiving fixing means (e.g., pins or screws) for fixing a crossrail support 17 (figures 4a, b), as it will be further explained in more details.
  • the T-shaped post is also provided with reinforcing crossbars 11 and with a metallic tip cast onto the post body at the junction 10.
  • the present invention also suggests a prop-supporting plate 13 (figures 3a and 3b) having through apertures 16 and an integral support element 14 in the form of a nose, which provides a support surface 15.
  • the prop-supporting plate 13 can be fixed by any suitable fixing means to the apertures of a post, e.g. to apertures 9 of the T-shaped post of figures 2a-2c, whereby the through apertures 16 match the through apertures 3 or 9 of the post body.
  • Plate 13 is to be fixed to the end posts of a fence in order to ensure proper tensioning of the post by anchoring the latter by means of a prop.
  • the prop is fixed to the ground and rests against support surface 15, thus causing the post to resist the traction which is necessary from time to time for keeping the wires always stretched.
  • Figures 4a and 4b show the support 17 for fitting the boards or crossrails 22 (figures 5a and 5b ), which are used in connection with T-shaped posts.
  • the crossrails have a hollow section, preferably in the form of a "C”.
  • the crossrails 22 are attached to the wall 8 of a post body 7 by fixing the support 17 by screws or pins, which pass through the through apertures 9 and 18 of the post body 7 and support 17, respectively.
  • Each end of a crossrail 22 is then fitted on a respective support 17 by slidingly fitting the hollow crossrail 22 over the support 17. Because the through aperture 18 of the support 17 is centred and single, the support may rotate, thereby allowing the crossrail to assume inclined positions when the posts are placed on an uneven surface.
  • the support is fixedly secured to a post, e.g. directly into through apertures 3 by means of a screw, and has a rounded surface which allows the crossrail to fit against the support at different angles, thereby providing the same adaptation capability as the illustrated embodiment.
  • a post head protection cap 26 can be seen in figures 6a-6c.
  • Said cap 26 has a cylindrical shape, and contains a cylindrical lateral wall 28, a massive metallic plate 27 on the top, internal walls 30 spaced apart (29) from the top, whereby the internal walls 30 form a "+” guiding space 31.
  • the protection cap 26 is used for protecting the upper end of a post, when the post is hammered to be driven into the ground, thus avoiding any damage to the post.
  • This protection cap 26 serves to several types of posts, e.g., having "L”, “T” or “+” cross sections because of its "+” guiding space, which cause the post to be tightly accommodated therein, thus also preventing the post from bending or warping while it is being driven.
  • Figure 7 shows a post driver 32, which adjusts adequately onto the protection cap 26.
  • This post driver 32 driven by the handles 34, hit the surface 27 of the protection cap 26 with the end 33, thus driving the post into the ground.
  • an L-shaped post may be provided with elliptical through apertures 36 (figure 8), while the metallic tip 37 is foreseen as a separate element (figure 9) which can be fitted on the lower end of the lowest post of a row of assembled posts.
  • the elliptic form of the through apertures 36 compensates for the misalignment between the apertures of the posts which occurs when one L-shaped post is placed in partial juxtaposition with another, i.e., when the lower end of one post is fitted within the "L" of the upper end of another post.
  • Posts can thus be assembled together (figure 10) by pins, screws or the like.
  • This stackable post can be also used for the construction of structures, and only the lowest post will be provided with a detachable metallic tip 37, which conforms to the profile of the post.
  • the fixation of the metallic tip 37 to the post 35 is also effected by means of a pin, which is pressed into the through aperture 41 of the post 35.
  • Another embodiment of the structural element, particularly a T-shaped fence post is shown in figure 11.
  • posts can be fixed one to another by means of screws, by making the flat sides of each post face the flat side of another post and aligning the respective apertures for passing a fixing means, such as a pin.
  • This post can also be provided with a removable tip 39, so that, again, only the lowest post of a row of assembled posts will be provided with a tip.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fencing (AREA)

Abstract

La présente invention concerne un élément structurel en plastique, plus particulièrement un poteau, ainsi qu'un système permettant de l'enfoncer dans la terre. Ce poteau se présente comme un corps allongé cruciforme ou en forme de L ou de T. Les pointes de ces poteaux peuvent être soit moulées dans ces derniers, soit détachables, les poteaux avec pointes moulées (39) étant conçus pour les clôtures utilisées pour entourer les animaux ou clôturer des champs. Ces poteaux (38) peuvent également être utilisés pour fabriquer de petites structures. Cette invention concerne par ailleurs un système d'enfoncement comprenant: des plaques de support, des moignons, des planches ou des traverses porte-outil, un capuchon de protection des têtes de poteaux ainsi qu'un dispositif d'enfoncement de poteaux.
PCT/BR1997/000071 1997-12-12 1997-12-12 Element structurel en plastique et ensemble structurel comprenant au moins un element structurel en plastique WO1999031337A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU53963/98A AU5396398A (en) 1997-12-12 1997-12-12 A plastic structural element and a structural assembly comprising at least one plastic structural element
PCT/BR1997/000071 WO1999031337A1 (fr) 1997-12-12 1997-12-12 Element structurel en plastique et ensemble structurel comprenant au moins un element structurel en plastique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/BR1997/000071 WO1999031337A1 (fr) 1997-12-12 1997-12-12 Element structurel en plastique et ensemble structurel comprenant au moins un element structurel en plastique

Publications (1)

Publication Number Publication Date
WO1999031337A1 true WO1999031337A1 (fr) 1999-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR1997/000071 WO1999031337A1 (fr) 1997-12-12 1997-12-12 Element structurel en plastique et ensemble structurel comprenant au moins un element structurel en plastique

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AU (1) AU5396398A (fr)
WO (1) WO1999031337A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20016848U1 (de) 2000-05-16 2001-02-22 Frisch, Hans, 89343 Jettingen-Scheppach Pfostenelement
GB2374880A (en) * 2001-03-09 2002-10-30 Anthony Roger Sealy Fencing system
FR2922723A1 (fr) * 2007-10-29 2009-05-01 Lacme Holding Sa "piquet pour cloture electrique"
EP2527569A1 (fr) * 2011-05-26 2012-11-28 Ekolplast, Naamloze venootschap Poteau destiné à être partiellement enfoncé dans le sol
FR3016649A1 (fr) * 2014-01-23 2015-07-24 L C Ecovalor Dev Element de cloture, du genre poteau ou lisse, cloture et son procede d'elaboration a l'aide desdits elements
EP4033055A1 (fr) * 2021-01-21 2022-07-27 Stichting Aandelen Beheer Henk Reinders Poteau de clôture ainsi que clôture formée de plusieurs de ces poteaux de clôture

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR360493A (fr) * 1905-12-16 1906-04-23 Paul Eugene Freret Piquet en ciment armé
DE2019686A1 (de) * 1970-04-23 1971-11-11 Inefa Kunststoffe Ag Verbesserter Pfahl
US4078754A (en) * 1976-12-30 1978-03-14 Gould George T Fence post sign holder
NL7706705A (en) * 1977-06-17 1978-12-19 Kraayenhof Design B V Vlosberg Land limit marking post - has plastics assembled sections with lateral attachments for wires or cross members and four-blade base for soil insertion
US4357001A (en) * 1976-03-23 1982-11-02 Schmanski Donald W Method and apparatus for making fences
DE3316790A1 (de) * 1983-05-07 1984-11-08 Felten & Guilleaume Energietechnik GmbH, 5000 Köln Elektrozaunhalterung aus kunststoff

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR360493A (fr) * 1905-12-16 1906-04-23 Paul Eugene Freret Piquet en ciment armé
DE2019686A1 (de) * 1970-04-23 1971-11-11 Inefa Kunststoffe Ag Verbesserter Pfahl
US4357001A (en) * 1976-03-23 1982-11-02 Schmanski Donald W Method and apparatus for making fences
US4078754A (en) * 1976-12-30 1978-03-14 Gould George T Fence post sign holder
NL7706705A (en) * 1977-06-17 1978-12-19 Kraayenhof Design B V Vlosberg Land limit marking post - has plastics assembled sections with lateral attachments for wires or cross members and four-blade base for soil insertion
DE3316790A1 (de) * 1983-05-07 1984-11-08 Felten & Guilleaume Energietechnik GmbH, 5000 Köln Elektrozaunhalterung aus kunststoff

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20016848U1 (de) 2000-05-16 2001-02-22 Frisch, Hans, 89343 Jettingen-Scheppach Pfostenelement
GB2374880A (en) * 2001-03-09 2002-10-30 Anthony Roger Sealy Fencing system
GB2374880B (en) * 2001-03-09 2004-11-03 Anthony Roger Sealy Fencing system
FR2922723A1 (fr) * 2007-10-29 2009-05-01 Lacme Holding Sa "piquet pour cloture electrique"
EP2527569A1 (fr) * 2011-05-26 2012-11-28 Ekolplast, Naamloze venootschap Poteau destiné à être partiellement enfoncé dans le sol
BE1019993A3 (nl) * 2011-05-26 2013-03-05 Ekolplast Nv Paal bedoeld om gedeeltelijk in een ondergrond te worden gedreven.
FR3016649A1 (fr) * 2014-01-23 2015-07-24 L C Ecovalor Dev Element de cloture, du genre poteau ou lisse, cloture et son procede d'elaboration a l'aide desdits elements
EP4033055A1 (fr) * 2021-01-21 2022-07-27 Stichting Aandelen Beheer Henk Reinders Poteau de clôture ainsi que clôture formée de plusieurs de ces poteaux de clôture

Also Published As

Publication number Publication date
AU5396398A (en) 1999-07-05

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