(57) It consists in incorporating a metal female part (4) provided with an internally
hollow emergent rod (3), provided or not with a helical thread, which will emerge
through a reinforcing area (8) provided with an opening (8') having a cavity or recess
inside the sole in which the female part (4) is incorporated, in cooperation with
two side fixing parts (6) and (6'), or else in a sole provided with circular reinforcements
(11) having a cross-like opening (11') which enable multidirectional movements, in
cooperation with fixing parts (5) provided with bores (5') in the case of the multidirectional
parts, along with an external coupling of a protecting part (12) carrying a bore (12')
through which the threaded or non-threaded rods of the studs extend, or else with
the cooperation of an elongated part (9), in the bidirectional embodiment, provided
with a central bore (9') and acting in the same way as the part (12) as an anchorage
protection.
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