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(11) | EP 0 050 346 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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| (54) |
An anchoring head for strands or cables for tensioning metal or concrete structures Ankerkörper für Drahtstränge oder Kabel zur Vorspannung von Metall- oder Betonstrukturen Tête d'ancrage pour des torons ou câbles destinée à mettre sous tension des structures métalliques ou en béton |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
[0001] This invention relates to an anchoring head for cables or strands, wherein the front bearing plate to the structure is provided with connections for the strands which are arranged at the vertices of adjoining equilateral triangles.
[0002] GB-A-864170 foresees anchoring plates having connections disposed with a pattern of adjoining equilaterial triangles, but no provision is made neither for fixing one anchoring plate to the other nor for avoiding a discontinuity of stresses in the zones where two contiguous plates meet.
[0003] AU-B-484438 provides a coupling for the periphery of flanges of anchoring heads, but nothing is foreseen for uniformally distributing the load within the plates nor in the zones where two adjacent plates meet.
[0004] Therefore, it is the object of the present invention to provide on the structure to be tensioned by means of the plate a perfect positioning of the cables or strands together with a maximum utilization of the available space and the most uniform distribution of the stresses.
[0005] It is a further object of the invention to improve the anchoring of the plate to the concrete.
[0006] The main object has been accomplished by providing an anchoring plate as specified in claim 1.
[0008] The present invention will now be better explained with reference to an exemplary embodiment that has been shown in the figures of the accompanying drawing, in which:
Fig. 1 is a side, partly sectional view of a head according to the present invention, the sectional view being taken along line 1-1 of Fig. 2;
Fig. 2 is a view of the front plate from the side 2-2 of Fig. 1;
Fig. 3 is a sectional view taken along line 3-3 of Fig. 1; and
Fig. 4 is a view similar to Fig. 2, but showing a plurality of juxtaposed plates.
[0009] From the drawing it will be seen that a head according to the present invention comprises a cone 10 secured to the end of a sheath 12, having a series of tubes 11 branching off therefrom, one for each cable or strand, which tubes act as coatings therefor.
[0010] They serve for leading the strands to the sleeves 24, then to the connections formed of holes 21, which are provided in the front plate 20.
[0011] The series of holes 21 is arranged at such a position as to form a lattice of adjoining equilateral triangles, at the vertices of which said holes 21 are provided. Reinforcing ribs 23 are provided between the holes 21.
[0012] The periphery 22 of plate 20 is provided with mutual coupling members 25 and 26 securing one plate relative to the adjoining plates.. Further portions of this periphery 22 are shaped with projections 27 and recesses 28 which work as coupling members and placed in such a way as to be inserted between the sides of the various equilateral triangles, so that the arrangement of the strands of a plurality of adjoining plates always corresponds to the vertices of equilateral triangles, as shown in Fig. 4. Thus, in this figure it will be seen that the distance d between two holes 21 remains unaltered even if measured between two holes 21 pertaining to two adjoining plates 20.
1. An anchoring head for cables or strands, wherein the front bearing plate (20) to
the structure is provided with connections (21) for the strands which are arranged
at the vertices of adjoining equilateral triangles characterized in that the periphery
(22) of the front plate (20) has mutual coupling members (25, 26; 27, 28) at least
partly shaped with projections (27) and recesses (28) of conjugate shape, whereby
a plurality of plates (20) can be juxtaposed, so that also for adjoining plates the
lattice arrangement of equilatral triangles remains unaltered.
2. A head according to claim 1, characterized in that at each connecting zone (21)
of the strands or cables the front plate (20) is provided with a sleeve (24).
3. A head according to any of the preceding claims, characterized in that the front
plate (20) is provided with ribs (23) extending between two connections (21) of the
cables or strands.
1. Ankerkörper für Drähte oder Kabel, bei welchem die die Struktur tragende Vorderplatte
(20) mit Anschlüssen (21) für die Kabel, die an den Scheiteln von anliegenden gleichsseitigen
Dreiecke angeordnet sind, versehen ist, dadurch gekennzeichnet, dass die Aussenseite
(22) der Vorderplatte (20) gegenseitige Kupplungsglieder (25, 26; 27, 28) hat, die
mindestens teilweise mit Vorsprüngen (27) und Einschnitten (28) entsprechender Form
ausgebildet sind, wobei eine Mehrzahl von Platten (20) aneinandergelegt werden kann,
so dass die Masteranordnung der gleichsseitigen Dreiecke auch für anliegenden Platten
unverändert bleibt.
2. Körper gemäss Anspruch 1, dadurch gekennzeichnet, dass an jeder Anschlusszone (21)
der Drähte oder Kabel die Vorderplatte (20) mit einer Büchse (24) versehen ist.
3. Körper gemäss einer der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
die Vorderplatte (20) mit Rippen (23), die sich zwischen zwei Anschlüsse (21) der
Drähte oder Kabel ausbreitet, versehen ist.
1. Tête d'ancrage pour torons on câbles où la plaque frontale de support (20) à la
structure est pourvue de connextions (21) pour les torons ou câbles qui sont placés
aux sommets des triangles equilatéraux contigue, caractérisée en ce que la périphérie
(22) de la plaque frontale (20) a des organes ou éléments d'accouplement réciproques
(25, 26; 27, 28) au moins présentant partiellement des saillies (27) et des échancrures
(28) de forme conjuguée, ainsi qu'une pluralité de plaques (20) peuvent être juxtaposées
de sorte que, même pour des plaques contigües, la disposition à réseau des triangles
équilatéraux ne change pas.
2. Tête selon la revendication 1, caractérisée en ce que dans chaque zone de connextion
(21) des torons ou câbles, la plaque frontale (20) est pourvue d'une manchon (24).
3. Tête selon une quelconque des revendications précédentes, caractérisée en ce que
la plaque frontale (20) est pourvue de nervures (23) que se trouvent entre deux connextions
(21) des torons ou câbles.