NO128033B

NO128033B -

Info

Publication number: NO128033B
Application number: NO00680/72*[A
Authority: NO
Inventors: Gunnar Olsson
Original assignee: Gunnar Olsson
Priority date: 1971-03-04
Filing date: 1972-03-03
Publication date: 1973-09-17
Also published as: US3810708A; SE350555B

Description

Piggtråd. Barbed wire.

Foreliggende oppfinnelse går ut på en forbedring av den piggtråd som er beskyt-tet ved patent nr. 89 752. Denne piggtråd består av jern eller annet metall med en mantel av plast, på hvilken der er utformet pigger av egnet hårdhet. Forbedringen består i at piggtråden har minst to paralleltløpende kjernetråder av metall som er anordnet i avstand fra hverandre og er innbyrdes forbundet under formidling av mantelmaterialet. The present invention concerns an improvement of the barbed wire that is protected by patent no. 89 752. This barbed wire consists of iron or other metal with a plastic sheath, on which spikes of suitable hardness are formed. The improvement consists in the fact that the barbed wire has at least two parallel running core wires of metal which are arranged at a distance from each other and are interconnected during the mediation of the sheath material.

Ved forbedringen oppnås spesielle for-deler sammenlignet med piggtråd med bare én kjernetråd, nemlig fremfor alt at trå-den lettere kan festes til stolper, f. eks. ved hjelp av spiker som slås gjennom plastmaterialet mellom trådene og inn i stolpen. Trådene kan også utnyttes for sig-nalimpulsgivning eller annen elektrisk overføring. The improvement achieves special advantages compared to barbed wire with only one core wire, namely above all that the wire can be more easily attached to posts, e.g. using nails that are driven through the plastic material between the threads and into the post. The wires can also be used for signal impulses or other electrical transmission.

Et eksempel på en piggtråd i henhold til oppfinnelsen er vist på tegningen, hvor: Fig. 1 viser en i henhold til oppfinnelsen utført piggtråd i snitt. Fig. 2 viser samme piggtråd i grunn- riss. An example of a barbed wire according to the invention is shown in the drawing, where: Fig. 1 shows a barbed wire made according to the invention in section. Fig. 2 shows the same barbed wire in basic Rice.

Den viste piggtråd består av to paral-lelle kjernetråder 1 av metall og en plast-mantel 2 som omslutter de nevnte kjernetråder og utfyller mellomrommet mellom dem, og på hvilken der er utformet pigger 3. The barbed wire shown consists of two parallel metal core wires 1 and a plastic sheath 2 which surrounds the aforementioned core wires and fills the space between them, and on which spikes 3 are designed.

Plastmantelen kan bestå av polyvi-nylklorid eller blandingspolymerisat av vi-nylgruppen. Annen plast og også gummi kan imidlertid tenkes å komme til an-vendelse. The plastic sheath can consist of polyvinyl chloride or mixed polymer of the vinyl group. Other plastics and also rubber can, however, be used.

Ved piggtråd i henhold til patent nr. In the case of barbed wire according to patent no.

98 752 den forbedring at piggtråden 98 752 the improvement that the barbed wire

har minst to parallelltløpende kjernetråder av metall som er anordnet i avstand fra hverandre og er innbyrdes forbundet under formidling av mantelmaterialet. has at least two parallel core wires of metal which are arranged at a distance from each other and are interconnected during the mediation of the sheath material.

Claims

1. Method of connecting a body of cement concrete, e.g. a roadway, with a base of sand, earth, etc. to obtain an even distribution of contraction cracks that occur in the body when the cement concrete hardens, where a layer of cement concrete is cast on the substrate and elongated hole-taking tools are passed through the cement concrete layer and into the substrate, so cement concrete will flow down into the holes in the substrate when the hole-taking tool is removed, forming anchoring elements when it hardens, characterized in that each hole-taking tool is first displaced in its axial direction obliquely through the cement concrete layer and down into the substrate, then pivoted with the tip lowered into the substrate as a pivot so that its longitudinal axis at least reaches a vertical line, and then withdrawn mainly axially .

2. Method as stated in claim 1, characterized in that the swinging movement is continued until the longitudinal axis forms an angle with the vertical.,

3. Method as stated in claim 1 or 2, characterized in that each hole-taking tool during the displacement down into the substrate is affected by an axially directed pressure force whose magnitude is determined by the density of the substrate.

4. Method as stated in claim 1, 2 or 3, characterized in that the cement concrete layer within the area of the hole-taking tool is compressed simultaneously with its swinging movement.

5. Device for carrying out a method as stated in claim 1, and including at least one rod-shaped hole-making tool (3)" characterized in that the hole-making tool is mounted pivotably on a device (10) that can be driven on the cement concrete layer (1), that drive means (22 , 15, 19) is arranged to set the hole-taking tool (3) with its longitudinal axis at an angle in relation to the surface plane of the cement concrete layer and to give the hole-taking tool an axially downward movement and drive it through the cement concrete layer (1) down into the substrate (2) to a depth adapted to the density of the substrate, and at the same time a swinging movement around the lower end of the hole-taking tool and, after the longitudinal axis of the hole-taking tool has been swung to a determined degree, to withdraw it from the substrate and the cement concrete layer.

6. Device as stated in claim 5, characterized in that the lower end of the hole-taking tool eye (3) is designed as a shovel (4).

7. Device as stated in claim 6, characterized in that the drive means (19320) for axially displacing the hole-taking tool (3) are arranged to exert an axial force adapted to the density of the substrate (2).

8. Device as specified in claim 7> characterized in that the axial force is adapted to the maximum density of the substrate.