Barbed steel strap

-A-

The invention relates to a barbed strip made of sheet steel in an embodiment according to the preamble of claim 1.

Known barbed bands of this type are made of stainless steel sheet, which gives the very long and slender spiked tips sufficient strength against unwanted deformations and moreover is corrosion-free. The known barbed bands have on both sides of the band part each other unopposed pairwise opposite spiked parts, which protrude on a flat surface laterally from the band member. which in turn is curved to an approximately semicircular cross-section and can be helically wound into a spiral, wherein for balancing the material in view of the different radii of the curved and spirally wound band portion in d-essen on the longitudinal edges adjacent side areas triangular.Eusklinkungen are provided.

Although such barbed bands have a particularly good protective or blocking effect due to their long spiked tips, but are unusually expensive to manufacture, since not only high material costs for the high quality material, but also high production costs are ent. Because the stabilizing of the spiky tips high-strength material causes considerable problems when cutting or punching, when form buckling of the band

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partly and with spiral winding.

Therefore, as a rule, at least predominantly barbed bands are still used, as are known from German Patent Nos. 1,033,626 and 1,040,940. These known barbed bands are made of unalloyed, optionally corrosion-protected galvanized sheet steel, which presents a much lower strength and shape retention and therefore usually includes a spring steel wire as a soul, which is more or less coated by the band part, wherein the spring steel wire not sheathing edge parts form the sting parts , These sting parts have only very short small free spiky tips, which arise from the fact that the sheet metal perforated in parallel rows and the sheet between the holes of each longitudinal row with a * sequence of two holes tangent, cut with each subsequent section the longitudinal side separating cuts into strips becomes. The blocking effect of such barbed tapes is substantially

ringer, * not sufficiently large part, however, the production of such barbed bands is much cheaper due to the cheaper and in particular also in the processing much cheaper material.

The invention has for its object to provide a barbed tape of the type mentioned with its own increased ι barrier effect, the cheap and relative

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moderately easy to produce.

This object is achieved by the barbed tape according to the invention by the features of claim 1. With regard to significant further embodiments, reference is made to the claims 2 to 10.

The barbed tape according to the invention provides a blocking effect using the relatively cheap and easily processable unalloyed steel sheet with a fraction of production costs and processing costs which is at least equal to that of the barbed bands of stainless steel sheet discussed above, the beading of the barbed pieces giving the barbed tips a stability which makes the barbed tips exceeds the spike tips made of stainless steel and thus ensures that they can not be easily bent or bent into an ineffective position »

The Sickungen can be provided by punching or rolling in the sting parts prior to cutting or breaking of the sheet in the barbed bands, in the latter case preferably a single bead per stinger part is provided, parallel to the base edge and runs along or in close distance to this.

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The beads not only stiffen the free spike tips, but also aggravate them and strengthen the spine part in its entirety, whereby the blocking effect can be increased by including a small acute angle in the base edges of the spike parts with an imaginary longitudinal center line of the strap part. Instead, or in addition, the spiked tips of the spiked parts may each be bent together to one side or alternately to opposite sides out of the central region of their spiked part, so that the most different orientations of the spiked tips Achieve space through which the spatial barrier effect of the individual tape strip or of the single turn in a spiral and increases the Gefähren for persons who make the attempt to penetrate protection systems from such barbed bands. Barbed bands of the inventive design * can on both sides of the band part in the longitudinal direction against each other staggered sting parts arranged or sting parts have, which face each other in a conventional manner on both sides of the band part unopposed pairs. However, you can also only one-sided with sting parts, but then preferably with strongly entangled sting in the room, be provided. Such entanglements are not

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only by deflections of the spiked tips relative to their central region, but in particular also thereby feasible * that the entire spiked part is twisted with deformation of the AJi trailer part.

Barbed bands of the inventive design are preferably used in configurations in which they are helically wound into a spiral whose spiral turns are clamped in places with each other. However, instead of this known configuration, they may be laid in any other suitable shape, in which case the band parts may remain as flat strips. Preferably, however, the band member is herumgebördelt in a known manner to a longitudinal spring steel wire which acts dimensionally stable, opposes greater resistance to severing and increased in spiral laying the resilience against spreading apart of turns and favors vibrations in contact.

Several embodiments of the subject matter of the invention are illustrated in more detail in the drawing. In detail show:

Fig. 1 is a plan view of a portion of a

StachGlbandes according to the invention with three ver different embodiments of the paired ange-

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arranged sting parts, Fig. 2 is a side view of Fig. 1, and

3 shows sections along the lines III-III to 5

VV in Fig. 1.

The existing of unalloyed steel sheet, optionally galvanized barbed tape consists of FIG. 1 from a longitudinal Öandteil 1 in the form of a first flat and. then around a spring steel wire 2 herumgebördelten strip and from this one-piece, arranged at intervals one behind the other, from the band part 1 laterally projecting spiked parts 3,4 or 5,6 and 7,8.

Irrespective of their final shape and orientation shown in the drawing, the spiked parts consist of isosceles, very slender triangles delimited by an outer, initially longitudinal base edge 9 of comparatively long length, in particular more than 5 cm, as well as leg edges 10. These close with the base edges 9 very small acute base angle, especially those below 25 °, for example 10 °, and go only near their imaginary internal intersection in a connection part 11, which forms only a short connecting web.

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The base edges 9 of the stinger parts 3 to 8 with an imaginary longitudinal center line of the hinge part 1 form a small acute angle, which may be caused by a slight deformation of the connecting parts 11. The sting parts .. lie on both sides of the band part 1 each other unopposed in pairs opposite, but can also be offset from each other in the longitudinal direction of the gap with two-sided arrangement for band part.

The sting parts are all provided with the free spiky tips stiffening beads, which at the same time increase the dimensional stability of the sting parts as a whole. In the embodiment of the spiked parts 3, 4, these each have two beads 12, each of which runs along a leg edge 10, which forms the outer boundary edge of the bead. Instead, the spiked parts 5, 6 each have a single bead 13 extending parallel to and close to their base edge 9, while finally the spiked parts 7, 8 are such beads

Fri.

14 own, which run parallel to and along the base edge 9. Such corrugations 13, 14, which are longitudinal prior to the final alignment of the spiked parts, can be formed by continuous passage of the spiked parts through pairs of rolls, whereas the corrugations 12 are to be formed by embossing processes by means of embossing dies.

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The spike tips 3¹ or 4¹ The spiked parts 3,4 are each bent together to one side of their spiky part and thereby bent from sting part to sting part in opposite directions from the central region, while the spiked tips. 7¹ or 8 'within its associated sting portion 7,8 are angled alternately to opposite sides out of the central region of their sting. The bending direction changes from sting part to sting part within the opposite pair. The spiked parts 5,6 have the simplest orientation without any turn.

In addition to or instead of desson the spiky parts can also be entangled as a whole by Querverdrehen their connecting parts in space, as for example, the dash-dotted lines 5 ', 6' in Fig. 2 illustrate. The Versehrungskung angle can be chosen largely arbitrary.

For burial or blocking, the barbed tape according to the invention can be helically wound into a spiral whose spiral turns are interleaved alternately in places, so as to bring about a positional fixation even when spiral spirals are drawn apart, to facilitate laying and also to improve the recombination during removal.

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