(57) A form for casting pillars, of the type for which the assembly of two identical forms
(10, 11) joined at an edge is provided by means of a threaded pin (12) which passes
through a lateral upright (14) of a first form (10) with which it is associated and
is designed to be inserted in a preset hole (15) of a series of aligned holes formed
in the facing containment panel (16) and in one of the cross-members (17) for its
support of a second form (11); the pin (12) is pulled by means of a nut plate (13)
which is screwed to the threaded end portion (12a) of the pin (12) in order to lock
the panel (16) of the second form (11) against the lateral upright (14) of the first
form (10). The pin (12) is arranged within a cross-member (19) of the supporting frame
of the containment panel (18), the cross-member (19) being constituted by a profile
whose cross-section is shaped so as to prevent the rotation therein of the head (20)
of the pin (12), the pin being free to perform a translational motion within the channel
(21) of the profile in the direction formed by its axis, between a locking position,
screwed onto the plate (13) and with the head (20) in abutment against the lateral
upright (14) of the first form (10), and an inactive position, in which the threaded
end (12b) of the pin (12) lies inside the upright (14), while the head (20) rests
against an extraction-preventing abutment (22) provided within the channel (21) of
the profile.
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