TECHNICAL FIELD OF INVENTION
[0001] The present invention refers to a security device couplable to European cylinder
locks, in particular of modular type, for the purpose of preventing the forced wrenching
of the cylinder if it subjected to acts of tampering, break-in or vandalism.
PRIOR ART
[0002] The European cylinder locks are the natural evolution of the double-sided locks.
Compared to the latter, the European cylinder locks have the advantage of working
with a key of extremely small size and of being easy to replace, in addition to offering
a higher degree of security against acts of tampering, break-in or vandalism.
[0003] In fact, the European-type cylinders are generally provided with anti-probing pins,
a body and rotor with anti-drilling protection and anti-ripping central bar.
[0004] In the scope of cylinders of European type are known the cylinders of modular type,
made up of a plurality of parts that can be assembled to each other so as to be adapted
to the thickness of the door on which the lock is to be installed. By way of example,
figures 1 and 1 a illustrate a modular cylinder 1 comprising a first module 2 and
a second module 3 mutually linked by a connecting bar 4.
[0005] Despite the security devices introduced, there remain some destructive techniques
aimed at putting into effect attempts to externally attack and tamper with the cylinder
lock, including the forceful extraction of the cylinder and the cloning/copying technique
known as "pongata".
[0006] This last technique makes it possible to break the cylinder in two by means of a
tool consisting of a handle and a vice in the shape of the cylinder; the vice is tightened
on the projecting part of the cylinder and, by prying with the handle, the cylinder
is broken in two pieces.
[0007] To protect the cylinder from this type of breaking-in, the so-called "Defender" or
"armour" devices have been introduced, consisting essentially of a cylindrical escutcheon
plate in the form of a half shell, fastened by screws to the lock, which covers the
projecting part of the cylinder, leaving accessible only the slit or keyhole into
which the key is inserted.
[0008] To avoid the possibility of detaching the armour by inserting and forcing by prying
an Innocenti Tube to shear the fastening screws, armours have been made in the shape
of a truncated cone or a hemisphere, or in a shape suitable to prevent the Innocenti
Tube from gripping the armours.
[0009] Although they guarantee an appropriate degree of security against the main tampering
or break-in attempts, the security devices described above are not capable of withstanding
external attacks in which a wrenching force is applied to the armour such as to shear
the screws that fasten the armour to the lock; in this manner, the cylinder breaks
and the door can be easily opened.
SUMMARY OF THE INVENTION
[0010] The main objective of the present invention is thus to devise a security device for
European cylinder locks, in particular of modular type for reinforced doors, capable
of overcoming the drawbacks of the prior art.
[0011] In the scope of the above objective, a purpose of the present invention is to design
a security device capable of also withstanding, in addition to the various external
attacks described above, break-in attempts made through the application of a torsional
or flexural force or a combined flexo-torsional force on the device.
[0012] Another purpose of the present invention is to provide a security device capable
of guaranteeing an improved level of security compared to the prior art devices.
[0013] One not least important purpose is to realize a security device for European cylinder
locks, in particular of the modular type, that achieves the above-mentioned objective
and purposes at competitive costs and that can be obtained with the usual known machinery,
plants and equipment.
[0014] The above objective and purposes, and others that will become more evident in the
description which follows, are achieved by a security device for European cylinder
locks as defined in claim 1.
BRIEF DESCRIPTION OF THE FIGURES
[0015] Further characteristics and the advantages of the present invention will become more
evident form the following description of a particular, but not exclusive, embodiment
illustrated by way of non-limiting example with reference to the enclosed figures,
wherein:
- figures 1 and 1 a illustrate a European modular cylinder of known type;
- figure 2 illustrates, in a rear perspective, an exploded view of a security device
for European cylinder locks, in particular of modular type, according to the present
invention;
- figure 3 is an exploded view partially in cross section of the device of figure 1
in a front perspective view;
- figure 4 shows a component of the device of the preceding figures mounted on the European
modular cylinder;
- figure 5 illustrates, in a perspective view partially in cross section, the assembly
of the security device applied to a European modular cylinder;
- figure 6 illustrates a perspective front exploded view of a second embodiment of one
part of the security device according to the present invention;
- figure 7 shows the part of the device of the previous figure in the assembled state;
- figure 8 illustrates, in a rear perspective exploded view, the part of the device
of the preceding figures before it is coupled to the remaining part of the device;
- figure 9 illustrates, in a front perspective view partially in cross section, the
assembly of the security device applied to a European modular cylinder lock;
- figure 10 illustrates, in a front perspective exploded view, a third embodiment of
one part of the security device according to the present invention;
- figure 11 illustrates the part of the device of the preceding figure in the assembled
state;
- figure 12 illustrates, in a front perspective exploded view, the security device of
figures 6 to 9 provided with a further and advantageous component element;
- figure 13 illustrates, in a front perspective view partially in cross section, the
assembly of the security device of figure 12 applied to a European modular cylinder
lock;
- figure 14 illustrates, in a cross-sectional view, the assembly of the security device
of figures 12 and 13 applied to a lock, and
- figure 15 illustrates, in a front perspective exploded view, the security device of
figures 10 and 11 provided with a further and advantageous component device.
DETAILED DESCRIPTION OF THE INVENTION
[0016] With reference to figures 2 to 5, number 101 indicates a modular European cylinder
lock comprising a first module 102 and a second module 103 which, once joined to each
other, form underneath them a central portion 101 a that is recessed with respect
to the end portions 101 b and 101 c to receive a connecting bar 104.
[0017] A modular European cylinder lock 101 is couplable to a security device according
to the present invention, which hereafter will also be referred to as "armour", comprising
a security escutcheon 105 and a security complementary body 106 cooperating with the
escutcheon 105.
[0018] The security escutcheon 105, essentially of cylindrical shape and/or shaped as a
truncated cone or in a shape suitable to prevent tampering attempts, is made in a
single piece and has a recessed blind housing 107 provided, on its sides, with first
guides 108, preferably of dovetail shape. The housing 107 is oriented toward the internal
part of the escutcheon 105 while it is closed toward the external part, that is, toward
the front part of the escutcheon 105 that protrudes, when in use, from the reinforced
door and is accessible from the outside of the door. In the embodiment illustrated
by way of example in the enclosed figures, the housing 107 has a half-moon shape.
Advantageously, from the bottom of the housing 107 protrude, longitudinally to the
escutcheon 105, centering means 109, such as a pair of pins.
[0019] The security escutcheon 105 is also provided with a through central opening 110,
communicating with the housing 107 within the body of the escutcheon 105, to allow
the insertion of the cylinder 101.
[0020] The security complementary body 106 is associable or associated, preferably by machining
in one piece, to the end of the connecting bar 104 facing, when in use, the security
escutcheon 105.
[0021] The complementary body 106 consists essentially of a head that is enlarged with respect
to the connecting bar 104 to which the body 106 is associated or associable, and has
a shape that is complementary to the recessed housing 107 of the escutcheon 105. On
the sides of the complementary body 106 are also provided second guides 111 conjugately
shaped to said first guides 108 so as to be able to couple with the housing 107.
[0022] The complementary body 106 is also advantageously provided with a first pair of holes
112 designed to engage, when the complementary body 106 is inserted into the housing
107 of the escutcheon 105, with the corresponding centering means 109 protruding from
the latter.
[0023] In the embodiment illustrated by way of example in the enclosed figures, the complementary
body 106 has a half-moon shape, complementary to the shape of the housing 107, so
as to complete and cooperate with the armour when the complementary body 106 is inserted
into the escutcheon 105 through the engagement of the first guides 108 with the second
guides 111, and then by engaging the centering means 109 with the holes 112, as will
be better explained herein.
[0024] The security complementary body 106 is made integral with the cylinder 101, jointly
with the connecting bar 104 at the recessed central portion 101 a through suitable
fastening means 113, such as for example screws, pins or other fastening devices;
in this manner, the complementary body 106 is made to form a single piece with the
cylinder 101 (arrow A, figure 3).
[0025] Once the complementary body 106 is joined to the cylinder 101, the assembly thus
formed is coupled to the security escutcheon 105 by inserting the module 102 of the
cylinder 101 inside the central opening 110 and the security complementary body 106
into the blind housing 107 through the engagement of the first guides 108 with the
second guides 111, and by engaging the centering means 109 with the holes 112 (arrow
B, figure 3).
[0026] This procedure produces an extremely rigid structure capable or resisting all tampering
attempts, including forcing by wrenching or bending or a combined flexotorsional strain
on the armour to break the cylinder, by effect of the mechanical junction between
the security escutcheon and the cylinder achieved through the complementary body,
which makes it possible to substantially form a single, mechanically resistant body.
In other words, the resistant structure of the lock, currently provided only by the
screws fastening the security escutcheon to the lock itself, is integrated and strengthened
by the solid structure of the complementary body that solidly joins the escutcheon
and the cylinder in an integral unit.
[0027] In fact, the solid joining between the complementary body 106 and the cylinder 101,
combined with the guided mounting of the assembly formed by the body 106 and the cylinder
101 onto the security escutcheon 105, is capable of exercising a high resistance to
the twisting and/or bending moment applied on the armour, a force that is created
principally by effect of the contact pressure between one of the first guides 108
and the respective one of the second guides 111, depending on the direction of the
torque applied thereon.
[0028] From the above, it is therefore evident how the present invention achieves the purposes
and advantages initially foreseen: in fact, it has been devised a security device
for European cylinder locks, in particular of the modular type for reinforced doors,
capable of withstanding attempts at breaking in through the application of a twisting
or bending, or a combined flexing-twisting force, on the device itself, in addition
to the other types of possible external attacks against a lock, guaranteeing in this
manner a higher level of security compared with the prior art devices.
[0029] Naturally, the present invention is susceptible of numerous applications, modifications
or variants without departing from the scope of patent protection as defined by the
independent claim 1.
[0030] For example, with reference to figures 6 to 9, a second embodiment of the security
device according to the present invention is shown, in which numeral 201 indicates
a European modular cylinder, comprising a first module 202, a second module 203 and
a connecting bar 204, couplable to a security device comprising a security escutcheon
205 and a security complementary body 206 cooperating with the escutcheon 205.
[0031] The security complementary body 206, formed with a head wider than the connecting
bar 204 and having an essentially cylindrical or polygonal shape, is associated or
associable to the connecting bar 204 or the cylinder 201 and is advantageously provided
on the sides with a first pair of holes 212; once the connecting bar 204 is joined,
at one end, to the first module 202 and, at the opposite end, to the second module
203, to assemble the cylinder 201, the complementary body 206 forms an integral piece
with the cylinder 201.
[0032] Advantageously, the complementary body 206 can be made integral with the connecting
bar 204, thus increasing the rigidity of the structure and therefore its capacity
to withstand break-in attempts.
[0033] The security escutcheon 205, essentially of cylindrical shape and/or tapered in the
shape of a truncated cone or in a shape suitable to prevent tampering attempts, is
made in a single piece and has a recessed blind housing 207 having a shape complementary
to the complementary body 206, on the sides of which are advantageously provided a
second pair of holes 208. The housing 207 is oriented toward the internal part of
the escutcheon 205 while it is closed toward the external part, that is, toward the
front part of the escutcheon 205 that protrudes, when in use, from the reinforced
door and is accessible from the outside of the door.
[0034] The security escutcheon 205 is also provided with a through central opening 210,
communicating with the housing 207 within the body of the escutcheon 205, to allow
the insertion of the cylinder 201.
[0035] Once the cylinder 201 is assembled with the complementary body 206, the assembly
thus formed is coupled to the security escutcheon 205 by inserting the cylinder 201
inside the central opening 210 and the security complementary body 206 in the blind
housing 207, and then engaging the first holes 212 and of the second holes 208 by
means of respective centering means 209, such as pins or dowels.
[0036] Naturally, the centering means 209 can be formed integral with the escutcheon 205
and protrude from the housing 207, as described above for the first embodiment or,
vice versa, they can be formed in a single piece and protrude from the complementary
body 206.
[0037] In figures 10 and 11 is shown a third embodiment of the security device according
to the present invention, in which the modular European cylinder 301 comprises a first
module 302 and a second module 303 having respective slots 302a and 303a to receive
a connecting bar 304 to which is associated, by coupling or formed in a single piece,
a security complementary body 306 having an essentially cylindrical or polygonal shape
to form a head that is wider than the connecting bar 304, which may be provided on
the sides with a first pair of holes 312; once the connecting bar 304 is connected
to the first module 302 and to the second module 303 at the slots 302a and 303a to
assemble the cylinder 301, the complementary body 306 forms a piece integral with
the cylinder 301.
[0038] The assembly thus formed is then coupled to a security escutcheon similar to the
one in the second embodiment illustrated in figure 8 and indicated with reference
numeral 205; the coupling methods, as well as the reference numbers, are the same
as described in relation to the second embodiment.
[0039] An added advantage provided by the second and third embodiments described above lies
in the fact that the security device is applicable to European cylinders of modular
type already existing on the market, by simply applying the complementary body 206
or 306 to the connecting bar 204 or 304.
[0040] According to an advantageous characteristic of the present invention, a security
device according to any one of the embodiments described above may also comprise a
reinforcing body 213, itself also couplable to said cylinder 101, 201, 301 at the
opposite side of the lock with respect to the one to which said security escutcheon
105, 205 is applied so as to avoid the "ripping out" of the cylinder, that is, the
axial extraction of the same from the lock.
[0041] In the following description, said reinforcing body 213 will be described with reference
to a security device in accordance with the second embodiment of the invention; clearly,
a person skilled in the field will have no problem transferring such teachings also
to a security device in accordance with the other embodiments of the present invention.
[0042] As can be seen in figures 12, 13 and 14, said reinforcing body 213, essentially cylindrical
in shape, has a central opening 214 to allow the insertion of said cylinder 201; in
particular, as shown in the figures, if said security escutcheon 205 is associated
to said first module 202, said reinforcing body 213 is coupled to said second module
203 of the cylinder 201.
[0043] The connection between said reinforcing body 213 and said cylinder 201 is achieved
through a coupling means 216, advantageously formed by a screw having a threaded shaft
216a, that can be inserted into a through hole 218 provided on said reinforcing body
213 and suitable to cooperate with a blind axial opening 204b, threaded internally,
formed on the connecting bar 204 of said cylinder 201, and in particular on an extension
portion 204a associated or associable to it, having a projecting end with respect
to the face of said second module 203.
[0044] Advantageously, said coupling screw 216 also comprises a countersunk head 216b that,
when the stem 216a is threaded into the axial opening 204b, engages the through hole
218, and presses against the external surface of said reinforcing body 213; in this
manner, the reinforcing body 213 is solidly joined to the cylinder 201 and prevents
the latter from being extracted axially from the lock by acting from the side of the
security escutcheon 205 during a break-in attempt.
[0045] If necessary, for a greater degree of security, said reinforcing body 213 may include
a pair of through holes 215, arranged preferably on the sides of said opening 214,
through which additional coupling means 217 are inserted into the lock to anchor themselves
in a corresponding pair of holes 215a made on said security escutcheon 205 (figure
8).
[0046] Figure 15 illustrates a security device according to the third embodiment of the
invention comprising a reinforcing body 213 associable to the cylinder 301 in a similar
manner as described in relation to the second embodiment.
[0047] Naturally, the shape of the housing for coupling the complementary body with the
cylinder, although it maintains the described characteristics, may vary so as to adapt
to the different types of European cylinders present on the market.
[0048] Moreover, the materials and equipment used to carry out the present invention, as
well as the shapes and dimensions of the individual components, may be the most suitable
to meet the specific requirements.
1. Security device adapted to be coupled to a European cylinder lock, said device comprising
a security escutcheon (105; 205) including an opening (110; 210) adapted to allow
insertion of said cylinder lock (101; 201; 301), characterized in that it further comprises a security complementary body (106; 206; 306) adapted to be
rendered integral with said cylinder lock (101; 201; 301), said security complementary
body (106; 206; 306) being couplable, jointly with said cylinder lock (101; 201; 301),
to said security escutcheon (105; 205) at a recessed housing (107; 207) having a complementary
shape in respect to said security complementary body (106; 206; 306).
2. Security device as in claim 1, wherein said cylinder lock (101; 201; 301) comprises
at least a first module (102; 202; 302) and a second module (103; 203; 303) mutually
linked by a connecting bar (104; 204; 304), said security complementary body (106;
206; 306) being associable or associated to said connecting bar (104; 204; 304) such
that, when said connecting bar (104; 204; 304) is joined to said first module (102;
202; 302) and said second module (103; 203; 303) to form said cylinder lock (101;
201; 301), said complementary body (106; 206; 306) becomes integral with said cylinder
lock (101; 201; 301).
3. Security device as in claim 2, wherein the assembly resulting from joining said complementary
body (106; 206; 306) to said cylinder lock (101; 201; 301) is couplable to said security
escutcheon (105; 205) by inserting said first module (102; 202; 302) through said
opening (110; 210) and said complementary body (106; 206; 306) into said housing (107;
207).
4. Security device as in claim 2, wherein said complementary body (106; 206; 306) is
made integral in one piece with said connecting bar (104; 204; 304).
5. Security device as in claim 1, wherein said opening (110; 210) is communicating with
said housing (107; 207).
6. Security device as in any of the preceding claims, wherein the sides of said recessed
housing (107) are provided with first guides (108).
7. Security device as in claim 6, wherein the sides of said complementary body (106)
are provided with second guides (111) conjugately-shaped to said first guides (108).
8. Security device as in claim 7, wherein insertion of said complementary body (106)
into said housing (107) is carried out by engaging said first guides (108) with said
second guides (111).
9. Security device as in any of the preceding claims, wherein centering means (109) are
provided between said security escutcheon (105) and said complementary body (106)
to insert said complementary body (106) into said housing (107).
10. Security device as in any of the preceding claims, wherein said complementary body
(106; 206; 306) mechanically joins said security escutcheon (105; 205) to said cylinder
lock (101; 201; 301) so as to form a solid resistant assembly.
11. Security device as in claim 1, further comprising a reinforcing body (213) couplable
to said cylinder (101; 201; 301) at the opposite side of said lock with respect to
the side to which said security escutcheon (105; 205) is applied through a coupling
means (216) to prevent the axial extraction of said cylinder (101; 201; 301) from
the side of said security escutcheon (105; 205).
12. Security device as in claim 11, wherein said cylinder (101; 201; 301) comprises at
least a first module (102; 202; 302) and a second module (103; 203; 303) mutually
linked by a connecting bar (104; 204; 304), said reinforcing body (213) being associable
to said connecting bar (104; 204; 304) so that, when said connecting bar (104; 204;
304) is joined to said first module (102; 202; 302) and second module (103; 202; 303)
to form said cylinder (101; 201; 301), said reinforcing body (213) forms a solid unit
with said cylinder (101; 201; 301).
13. Security device as in claim 12, wherein an extension portion (204a) is associable
or associated to said connecting bar (104; 204; 304) and has an end protruding with
respect to the face of the second module (203) of said cylinder (201), said extension
portion (204a) being provided with a blind axial opening (204b) suitable to cooperate
with said coupling means (216).
14. Security device as in claim 13, wherein said coupling means (216) is formed by a screw
comprising a threaded shaft (216a) suitable to cooperate with said blind axial opening
(204b) present on said extension portion (204a), said screw further comprising a countersunk
head (216b) suitable to engage a through hole (218) present on said reinforcing body
(213).
15. Security device as in any of the claims from 11 to 14, wherein said reinforcing body
(213) comprises a pair of through holes (215) through which coupling means (217) are
inserted into the lock to anchor themselves in a corresponding pair of holes (215a)
present on said security escutcheon (105; 205).