ES213601U - Self-tension pin. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Self-retaining pin, characterized in that it is constituted by a body molded of rigid plastic material, endowed with a certain elasticity, which consists of a central stem with two faces parallel to each other, joined by its upper end to a flat head equipped with a diametral rib on its lower face, and finished in wedge at its lower end, said stem being connected in its lower part, through a transverse partition of weak thickness, with a peripheral rim having a diametral groove in the same sense as said groove of the head, deriving from the lower face of said ridge a longitudinal core of circular section, with an axial notch up to the vicinity of its lower end, whose slot is in extension with respect to the central stem and has in inclined plane the central part of its two inner parts, with mutual convergence from top to bottom, so that to join transversely two pieces lami in each case, a hole through which the lower end of the pin is aimed is placed in both holes, after which an impact is released on the head of the pin, which determines the rupture of said partition, the sinking of the stem inside the core. By its notch, and the penetration of this core into the said holes, whereby the pin is in interlocking for the two sheets, fastened on them on one side by the head, whose rib fits in the groove of the circular rim, and at the other end by means of a protuberance formed by the lower part of the core expanded by effect of the pressure to which the stem subjects it against its inclined inner planes. (Machine-translation by Google Translate, not legally binding)