[0001] Object of the present invention is an antipanic pushbar. It is of the type which
is fixable on one side of a door and connectable to a lock which can be manoeuvred
from the other side by means of a normal handle or key. The activating of the lock
is performed by means of a mechanism which is able to transform a movement of a mobile
body, with which the pushbar is equipped, into a rotation aimed at producing the opening
movement of the lock.
[0002] The principal problem existing in the prior art, which the present invention resolves,
is that of providing a single pushbar that is usable both with a right-side opening
and with a left-side opening: that is, of providing a pushbar which can be applied
either to the left or the right side of a door while producing the correct directional
rotation in both cases for the rotation manoeuvre of the handle, situated on the opposite
side of the door, to produce the opening of the lock. The present invention, as characterized
in the claims which follow, provides a simple and effective solution to the above-described
problem.
[0003] One advantage of the invention consists in its easy possibility of application to
all types of locks normally coupled with antipanic pushbars.
[0004] Further characteristics and advantages of the invention will better emerge from the
detailed description that follows, of some preferred, but not exclusive embodiments
of the invention, illustrated here in the form of non-limiting examples in the accompanying
figures, in which:
- Figure 1 shows a partial and schematic section along plane II-II of Figure 2;
- Figure 2 shows a schematic section along plane I-I of figure 1;
- Figure 3 shows a schematic section along plane IV-IV of figure 4;
- Figure 4 shows a schematic section along plane III-III of figure 3.
[0005] With reference to the above-mentioned figures, 1 indicates a first embodiment of
an antipanic pushbar which is provided with a base 4, arranged to be fixed to a side
20 of a door, and with a mobile body 5 mounted to the base 4 and able to move in normal
direction with respect to said base 4. The mobile body 5 is fixed to the base 4 by
means of a mechanism, not illustrated in the figures, which is able to transform any
reasonable movement of the mobile body 5 into an axial sliding of a bar 2 in the direction
indicated by the arrow 11. The bar 2 is guided in its sliding by a pivot 15, fixed
to the base 4, which pivot 15 is coupled with an allowance internally to a longitudinal
slot 16 bored into the bar 2. The bar 2 has solid to it a pivot 3, which pivot 3 is
arranged so as to interact with one end 8 of a right-angled command lever 6 which
lever 6 is pivoted to the base 4 by means of a first fulcrum 7. The lever 6 has a
second end 9 arranged to interact on contact with a pivot 13 which is fixed to the
end of a manoeuvring lever 10, in its turn pivoted on the base 4 by means of a hollow
pivot 17. The hollow pivot 17 has internally coaxially a square-section hole 18 into
which can be inserted a manoeuvring organ 12 in the form of a square bar, arranged
to be coupled with a corresponding square-section hole in the lock to which the pushbar
1 is to be coupled. In a perfectly symmetrical position with respect to the fulcrum
7, and with respect to a median longitudinal plane, parallel to the movement axis
of the bar 2 and containing the rotation axis of the hollow pivot 17, a second pivot
14 is arranged, with the aim of permitting of the pivoting of the same lever 6, which
is also located with symmetrical disposition with respect to the said plane. In other
words, the lever 6 can be taken off the first fulcrum 7, turned about and pivoted
on the pivot 14. In order to permit this operation, the command lever 6 is equipped
with a generally symmetrical structure with respect to its own median plane, which
is perpendicular to the rotation axis. Also the manoeuvring lever 10 can be arranged
in a symmetrical position with respect to said longitudinal median plane, containing
the rotation axis of the hollow pivot 17, in order to keep the reference position
of the square-section hole 18 unaltered, so that a perfectly symmetrical mechanism
is established with respect to the mechanism, represented in Fig. 2, constituted by
the lever 6 and the manoeuvring lever 10.
[0006] The possibility of mounting the same mechanism in two exactly symmetrical positions
permits of obtaining in both cases two opposite rotation directions of the hollow
pivot 17, produced by the same command from the bar 2. The same pushbar can thus be
used both for right-side opening and left-side opening.
[0007] In figures 3 and 4 a second embodiment of the invention is illustrated which is different
from the preceding one in substance by the fact that it envisages, contemporaneously
mounted on the base 24 of a pushbar 21, two symmetrical mechanisms, activated by one
bar 22. In particular, the two said mechanisms are arranged symmetrically with respect
to a longitudinal median plane perpendicular to the base 24 and containing the axis
of the bar 22. Each mechanism comprises a command lever 26 having a first end 28 in
which a slot 35 is bored, arranged so that a pivot 23 fixed to the bar 22 couples
internally to it. Each command lever 26 is further equipped with a second end 29 arranged
to come into contact with a pivot 33 of a manoeuvring lever 30, which manoeuvring
lever 30 is pivoted by means of a hollow pivot 37 to the base 24. The two levers 26
are pivoted to the base 24 by means of two pivots 27 and 28, which are located symmetrically
with respect to the said median plane of symmetry. The hollow pivot 37 is equipped
with a hollow square-section sliding fit 38 arranged in order that internally to it
a manoeuvring organ 32 can be coupled, which manoeuvring organ 32 comprises a usual-type
square-section bar suitable for coupling with the corresponding hole with which the
lock to be coupled with the pushbar 21 is equipped. The two hollow pivots 37 present
distinct parallel axes, symmetrically arranged with respect to the said longitudinal
median plane. A movement, induced by the mobile body 25 on the bar 22 in the direction
indicated by the arrow 31, produces two equal rotations, but in opposite directions,
of the two hollow pivots 37. By means of the manoeuvring organ 32 located in one of
the two hollow pivots 37, the desired opening movement can thus be obtained.
1) Antipanic pushbar of the type equipped with a mechanism able to transform the movement
of a mobile body with which the pushbar is equipped into a rotation aimed at producing
the opening movement of a lock coupled to said pushbar; comprising a bar 2 or 22,
which is guided to slide axially by the said mechanism in a direction which is parallel
to the angle of the pushbar 1 or 21 and which bar 2 or 22 is equipped with at least
one pivot 3 or 23 by means of which said bar 2 or 22 is able to interact with at least
one lever mechanism arranged to produce the said opening movement of the lock; said
lever mechanism comprising:
- at least one command lever 6 or 26, pivoted by means of a first fulcrum 7 or 27
to a first fixed axis, oblique with respect to the movement axis of the said bar 2
or 22; said command lever 6 or 26 having at least a first end 8 or 28 arranged to
interact on contact with said pivot 3 or 23;
- at least one manoeuvring lever 10 or 30 pivoted about a second fixed axis and having
rotatably solid about said fixed axis a manoeuvring organ 12 or 32 aimed at permitting
coupling with the said lock in order to command the opening movement; said command
lever 6 or 26 having a second end 9 or 29 aimed at interacting with a pivot 13 or
33 fixed on the free end of said manoeuvring lever 10 or 30;
- being further envisaged, in a symmetrical position with respect to said first fulcrum
7 or 27 according to a longitudinal median plane parallel to the movement axis of
the said bar 2 or 22 and to the axis of the first fulcrum 7 or 27, at least a second
pivot 14 or 34 to permit of pivoting at least one said command lever 6 or 26 symmetrical
with respect to said median plane and arranged to permit interaction with a manoeuvring
lever 10 or 30, which lever 10 or 30 is also located at a symmetrical angle.
2) Antipanic pushbar as in claim 1 wherein at least the said command lever 6 has a completely
symmetrical structure according to a median plane perpendicular to its own rotation
axis.
3) Antipanic pushbar as in claim 1, wherein the said second fixed axis, on which the
said manoeuvring lever 10 is pivoted, is contained within the said median plane of
symmetry and is perpendicular to the movement axis of the said bar 2.
4) Antipanic pushbar as in claim 1, comprising two said second fixed pivot axes, separate,
parallel and symmetrically arranged according to the said median plane (of symmetry);
on each said fixed axis being pivoted one said manoeuvring lever 30; each said manoeuvring
lever 30 being coupled with a corresponding command lever 26 together with which it
forms the said lever mechanism; its being envisaged that the two said command levers
26 of the two said lever mechanisms have their respective first ends 28 arranged to
interact with said pivot 23 of said bar 22.
5) Antipanic pushbar as in claim 4 wherein each said first end 28 of each said command
lever 26 has a slot 35 arranged so that it couples internally with said pivot 23,
with possibility of axial sliding along the axis of said slot 35; said pivot 23 comprising-a
pivot with its axis parallel to the pivot axis of the said command lever 26.
