EP0334183B1 - Drahthalter aus Kunststoff - Google Patents

Drahthalter aus Kunststoff Download PDF

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Publication number
EP0334183B1
EP0334183B1 EP89104564A EP89104564A EP0334183B1 EP 0334183 B1 EP0334183 B1 EP 0334183B1 EP 89104564 A EP89104564 A EP 89104564A EP 89104564 A EP89104564 A EP 89104564A EP 0334183 B1 EP0334183 B1 EP 0334183B1
Authority
EP
European Patent Office
Prior art keywords
pin
wire holder
holder according
head
wire
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP89104564A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0334183A1 (de
Inventor
Klaus-Dieter Bethke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT89104564T priority Critical patent/ATE65284T1/de
Publication of EP0334183A1 publication Critical patent/EP0334183A1/de
Application granted granted Critical
Publication of EP0334183B1 publication Critical patent/EP0334183B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 invention relates to a wire holder of the type corresponding to the preamble of claim 1.
  • Such a wire holder is known from DE-PS 22 31 337.
  • the known wire holder is made in one piece from plastic. It has been shown that this wire holder sometimes does not withstand particularly high tensile and shear loads in the expansion pin area. Such high loads are caused, for example, by abnormal effects on the wire mesh, the tension wires of which are held by wire holders of the type in question. It can be, for example, wind-loaded snowboards, bushes pressed or fallen against the wire mesh and smaller trees and the like. While the known wire holder is very well suited for normal loads, it has failed in a number of cases when the extraordinary loads mentioned occur. A break occurs in the area of the transition from the expansion spigot to the holding part.
  • the total forces exerted on the wire holder are limited to a substantially the circumferential surface of the bore transferred to the wall of the post, which is usually given by a hollow profile.
  • a high surface load thus has an adverse effect on the stress concentration caused by the cross-sectional transition in such a way that the strength of the material is sometimes exceeded.
  • the invention has for its object to provide a generic wire holder in the sense of a heavy-duty wire holder, so that it has grown beyond the normal level of stress without loose parts that can easily be lost or special tools are required for attachment.
  • the metal sheathing significantly improves the transmission of the forces introduced into the wire holder to the post.
  • the metal sheathing initially protects the pin, which is made of plastic and which engages in the perforation of the post, from high surface pressures by distributing the forces over a larger surface of the pin. At the same time, however, the forces are passed into the head, so that the concentration of forces given by the cross-sectional transition is no longer so noticeable and the peak values occurring in the plastic are significantly lower than in the known embodiment.
  • the metal jacket is inserted into an injection mold in the form of a simply designed metal sleeve using a fully automatic loading system typical of mass parts. After the injection molding process, there is a quasi one-piece body in a positive and non-positive combination of plastic and metal. The manufacturing costs are considerably below a multi-part, solid metal design, and the strength of a pure one Plastic version is significantly exceeded.
  • the metal jacket extends to below the head slot, whereby the forces from the wire can be largely introduced directly into the metal jacket and passed on to the post.
  • the metal jacket has a widening at the end remote from the pin, i.e. the rifle is a collar rifle.
  • the widening means a considerable reinforcement of the metal jacket and a safeguard against tearing out the head.
  • the widening conforms to the roundness of the wire in the head slot, so that a kind of positive connection between the widening and the wire arises, which makes a considerable contribution to the strength.
  • the tapering point lies in the interior of the post, so that when the spreader pin hits the taper and tries to drive it apart, the corresponding deformation of the outside to a cross-section exceeding the outline of the bore in the post takes place inside the post as desired.
  • the spreader pin consisted of a thicker wire pin with a circular cross-section, which was bent at the impact end in a semicircle to form the hook.
  • the point of impact of the hammer was in the area of the apex of the semicircle, i.e. next to the shaft of the expansion pin engaging in the pin.
  • a feature important for achieving the desired, particularly tight fit of the wire holder is, according to claim 6, that the striking face of the expansion pin lies in the axis of the shaft. Bending as with a bent hook end is no longer possible.
  • the production can be carried out in such a way that the expansion pin is made of flat material, for example punched out.
  • Influencing of the hook part by the driving hammer blows can also be suppressed further if the striking surface is somewhat increased compared to the hook part.
  • the shaft of the expansion pin can be tapered in a wedge shape in the hook plane. The widening of the pin and the metal sheath takes place only on two vertically opposite sides and leads to an oval expansion of the metal sheath, the longer axis being vertical, ie parallel to the stress on the wire holder due to the weight of the wire.
  • the thickness of the flat material forming the expansion pin corresponds to the width of the recess in the head and the pin of the wire holder. In the direction perpendicular to the plane of the expansion pin, there is therefore no significant contact pressure and hardly any friction, so that the driving energy mainly benefits the deformation.
  • the wedge angle of the spreader pin corresponds to the angle of the taper in the recess of the pin.
  • the behavior of the fastening device can be influenced by different angles and differently positioned positions of the taper, for example in order to adapt to different wall thicknesses of the post consisting of hollow material.
  • the feature of claim 10 serves to increase the strength and also the direct transfer of forces to the metal jacket.
  • the feature of claim 11 results in an additional increase in strength.
  • wire holder can be preassembled in the factory, ie the fence posts can be delivered with wire holders immediately.
  • the pin sits tight in the respective hole in the fence post.
  • the spreader pin is held in the recess by friction without being completely hammered in so that the wire can still be inserted.
  • Fig. 1 the wire holder designated as a whole by 100 is shown in the assembled state. It is used to fix a horizontal tension wire 1 for a chain link fence on a fence post 3 made of tubular material and provided with a bore 2 (FIG. 7).
  • the wire holder 100 comprises a head denoted as a whole by 4, which has a substantially cuboid shape and from whose flat or concave contact surface 19 a pin 5 protrudes vertically, which is inserted into a bore 2 of the post 3 when the wire holder 100 is fixed and then through Driving the expansion pin 20 (FIG. 6) inside the post 3 expanded and thereby fixed on the edge of the bore 2, as can be seen from Fig. 7.
  • the wire holder 100 On the side facing upwards during operation, the wire holder 100 has a head slot 6, the cylindrical base 7 of which runs horizontally and which has a width approximately corresponding to the diameter of the tensioning wire 1.
  • the pin 5 unloads below the base 7 of the head slot 6 and is surrounded by a sleeve-shaped metal jacket 8 which extends under the base 7 of the head slot 6 into the interior of the head 4 and beyond the base 7, i.e. in FIG. 3 to the right of the head slot 6, has a widening 9 obtained by flanging, which anchors the right end of the metal jacket 8 in the material of the head 4 and also conforms to the rounding of the base 7, so that the forces of a wire inserted into the head slot 6 are quite high immediately, ie only with the interposition of a substantially constant thickness plastic layer from which wire 1 is transferred to the metal sheath 8.
  • the cylindrical indentation 18 running perpendicular to the axis of the metal sheath 8, the top of which extends right up to the groove base 7, also serves to improve the anchoring of the metal sheath 8 in the head 4 and the direct transfer of the forces of the wire 1 into the metal sheath 8 or the fence post 3.
  • the cuboid head 4 also has a recess, designated as a whole as 10, which extends into the pin 5 and adapts its shape to the shape of the expansion pin 20, as will be explained in more detail below.
  • the flat walls of the recess 10, which are parallel to the plane of the drawing, are at a distance from one another which corresponds to the thickness of the expansion pin 20 made of flat material (FIG. 3).
  • the wall 11 of the head slot 6 located on the right in FIG. 3 is perforated, ie the recess 10 here has a passage 13 to the head slot 6.
  • this Passage 13 protrudes from below a tongue 12 of the plastic material which is bent over the tensioning wire 1 in the manner shown in FIG. 7 when the expansion pin 20 is driven in, so that it is pressed elastically onto the base 7 of the head slot 6 and is kept free of vibrations.
  • the wall 14 of the head slot 6 on the left has an approximately square passage opening 15 in the area of the passage 13, the purpose of which will be explained with reference to FIGS. 6 and 7.
  • a type of head 22 adjoins the shaft 21 on the right with a striking surface 23 which is located approximately in the axis of the shaft 21.
  • the head 22 continues upwards into a hook part 24, the free hook end 25 pointing in the direction of the shaft 21.
  • the free end of the shaft 21 is tapered in a wedge shape by opposing wedge surfaces 26 in the hook plane.
  • the part of the recess 10 lying in the region of the pin 5 tapers at the boundaries located above and below according to FIG. 3 via inclined surfaces 27 which correspond to the wedge surfaces 26 of the expansion pin 20.
  • a passage 28 remains at the narrowest point, which allows the tip of the shaft 21 to pass through.
  • the inclined surfaces 27 are arranged such that they are predominantly inside the post 3 when the wire holder 100 is installed.
  • the wire holder 100 with the pin 5 is inserted into the bore 2 of the post 3 in the manner shown in FIG. 7 and the wire 1 is inserted.
  • the spreader pin 20 is pressed into the recess from the right until the wedge surfaces 26 come to bear on the inclined surfaces 27 and is held in this position with a certain amount of friction. With the help of a hammer, the expansion pin 20 is driven in further. The wedge surfaces 26 push the inclined surfaces 27 apart.
  • the metal jacket 8 deforms oval here, as can be seen from FIG. 8.
  • the tip of the shaft 21 emerges from the pin 5 to the left as shown in FIG. 7.
  • the free end 25 of the hook part 24 passes through the passage 13 and thereby puts the tongue 12 over a tension wire 1.
  • the free end 25 enters the square recess 15 and remains in the passage 15 at a short distance from the outside of the post, so that the corrosion protection layer of the fence post 3 is not damaged. As can be seen from FIG.
  • the former inclined surfaces 27 are pushed up to the square part of the cross section of the shaft 21 at full driving depth.
  • the hook part 24 jumps back against the striking surface 23 in a small step 16, so that it is not hit by the hammer and is not bent when the expansion pin 20 is driven in.
  • the fully driven one Spreader pin 20 is located practically completely in the correspondingly designed recess 10 and, in particular on the driving-in side, is essentially flush with the surface of the head 4 there.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ropes Or Cables (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Clamps And Clips (AREA)
EP89104564A 1988-03-24 1989-03-15 Drahthalter aus Kunststoff Expired - Lifetime EP0334183B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89104564T ATE65284T1 (de) 1988-03-24 1989-03-15 Drahthalter aus kunststoff.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3809916 1988-03-24
DE3809916A DE3809916C1 (enrdf_load_stackoverflow) 1988-03-24 1988-03-24

Publications (2)

Publication Number Publication Date
EP0334183A1 EP0334183A1 (de) 1989-09-27
EP0334183B1 true EP0334183B1 (de) 1991-07-17

Family

ID=6350563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89104564A Expired - Lifetime EP0334183B1 (de) 1988-03-24 1989-03-15 Drahthalter aus Kunststoff

Country Status (3)

Country Link
EP (1) EP0334183B1 (enrdf_load_stackoverflow)
AT (1) ATE65284T1 (enrdf_load_stackoverflow)
DE (1) DE3809916C1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676489B1 (fr) * 1991-05-15 1998-08-28 Gantois Ets Profile universel servant de poteau vertical pour la realisation de clotures.
GB2286839B (en) * 1994-02-23 1997-04-09 Robert Croker A wire support for a fence
EP1820381B1 (de) 2006-02-18 2013-07-03 Rauch Landmaschinenfabrik Gmbh Sämaschine zum reihenweisen Einbringen von Saatgut in den Boden

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2950355A1 (de) * 1979-12-14 1981-06-19 Vw-Werke Vincenz Wiederholt, 4755 Holzwickede Spanndrahthalter fuer zaeune
DE3171461D1 (en) * 1981-04-15 1985-08-29 Eggert Johannsen Wire fixing for fences

Also Published As

Publication number Publication date
ATE65284T1 (de) 1991-08-15
EP0334183A1 (de) 1989-09-27
DE3809916C1 (enrdf_load_stackoverflow) 1989-06-29

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