Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B21/00—Locks with lamelliform tumblers which are not set by the insertion of the key and in which the tumblers do not follow the movement of the bolt e.g. Chubb-locks
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
  • E05B15/06—Lock wards

Definitions

• the present invention relates to a safety lock.
• the present invention relates to a safety lock of the type referred to as "plate lock”, “lever lock” or “double-sided lock” comprising a bolt member movably mounted on a frame and shiftable by rotation of the key in the lock between a first position corresponding to an open condition of the lock and a second position corresponding to a closed condition of the lock.
• the safety lock further comprises a pack of safety plates or wafers movably mounted on the frame and shiftable by rotation of the key in the lock to a position enabling movement of the bolt member.
• Each safety lock of the above described type can be opened/closed by a specific key preferably provided with double-sided tailpieces or blades the edges of which are indented and define the code or encryption of the key itself.
• Figs. 9- 11 depict application of the manipulation instrument and pusher with reference to a safety lock of the conventional type.
• This new effraction technique is simplified with respect to the previously used techniques, and extends the range of possible users; in addition, it does not leave any sign of burglary or effraction. In addition, traditional safety locks appear to be rather vulnerable relative to this new effraction technique.
• a lever bolt is known from EP0594984 in which a barrier in the form of a disc is provided.
• the technical task underlying the present invention is to propose a safety lock overcoming the above specified drawbacks of the known art .
• - Fig. 1 is a diagrammatic perspective view divided into separate parts of a portion of a safety lock according to the present invention
• - Fig. 2 is an enlarged front view of a detail in Fig. i;
• FIG. 5 is an enlarged front view of some details in Fig. 1;
• Figs. 6 and 7 are a perspective view and a side view respectively, of the details in Fig. 5;
• FIG. 8 is an enlarged view of the detail VIII in Fig. 7;
• FIG. 9-11 are perspective views of a lock of the conventional type in the closed condition and submitted to an illicit opening attempt by a manipulation instrument and a pusher.
• reference numeral 1 generally identified by reference numeral 1 is a portion of safety lock shown in separate parts.
• Box 2 Denoted at 2 is a box closed on one side by a cover 3 and containing a pack of safety plates 4 or tumbler plates or “gorges" movably mounted inside the box in a direction parallel to their plane. Box 2 defines a lock frame .
• Fig. 1 the reference numerals relating to elements of the safety plates have been reproduced in one of the safety plate alone for the sake of simplicity.
• Denoted at 5 are slide slots of the safety plate adapted to respectively receive a pin 6 associated with box 2 for guiding movement of the safety plates inside the box.
• the safety plates 4 have windows 8 with indented edges that define passage grooves 9.
• the safety plates further comprise edge portions 10 designed to be engaged by indented edges of two double-sided tailpieces or blades of the key defining the code or encryption of the key itself.
• Opening 7 of cover 3 defines a passage port for the key that is projected along a direction transverse to the lock also at the safety plates 4, under normal use conditions of the lock.
• the key passes below the edge portions 10 (alternatively, the safety plates may comprise slots adapted to receive the key under normal use conditions of the lock) .
• the frame defines a passage port for the key in the lock that is projected right through the lock and identifies a free passageway for insertion of the key transversely of the safety plates. Projection of opening 7 in each plane parallel to the safety plates 4 defines the passage port of the key in the lock.
• Denoted at 12 is a bolt member, for example made with a sheet metal plate slidably mounted inside box 2 and associable with the bolt pins not shown.
• the bolt member 12 is movably mounted on the frame and is shiftable by rotation of the key in the lock between a first position corresponding to an open condition of the lock and a second position corresponding to a closed condition of the lock (Figs. 3 and 4 correspond to the second position) .
• movement of the safety plates 4 caused by rotation of the key is substantially perpendicular to movement of the bolt member 12 on passing from the first to the second positions and vice versa.
• movement of the bolt member 12 is horizontal.
• the key windows 8 and the key double-sided profiles are such shaped that rotation of the key lifts the safety plates 4 to such positions that movement of the bolt member 12 is enabled.
• the safety plates 4 are movably mounted on the frame and shiftable by rotation of the key in the bolt to an enabling position of the movement of the bolt member.
• the bolt member comprises a safety pin 13 or "mentonnet" protruding through the windows 8 of the safety plates.
• the height of the indented edges or double-sided blades of the key enables alignment of the passage grooves 9 of the safety plates that define a free passageway for the safety pin 13 between the tooth tips of windows 8, at a key turn.
• each safety plate comprises four passage grooves 9 sequentially defining the passageway of the safety pin 13 at four key turns.
• the number of the safety plates can vary; in the example shown five safety plates are provided which correspond to five different heights of the encryption of each side of the key .
• the safety lock 1 advantageously comprises a shield S movably mounted on the frame and shiftable, preferably translatable, due to displacement of at least one safety plate 4 to the enabling position. Shifting of shield S takes place between a permission position for passage of the key or other, in which the passage port is clear (Fig. 3), and at least one obstruction position in which said passage port is at least partly obstructed by the shield (Fig. 4) .
• the shield is disposed inside the frame, internally of box 2 for example.
• shield S is adapted to generate a growing obstruction of the passage port of the key depending on the shield position; for instance, shield S at least has a substantially inclined profile S'.
• the shield is disposed parallel to the safety plates 4 and preferably is formed with an anti-manipulation plate 14, shown in detail in Fig . 2.
• the anti-manipulation plate 14 is disposed parallel to the safety plates 4. As shown in Fig. 1, the anti- manipulation plate 14 is disposed in an intermediate position relative to the pack of safety plates 4; alternatively, the anti-manipulation plate can be disposed at any position relative to the pack of safety plates 4.
• Slide slots of the anti-manipulation plate 14 have been identified by reference numeral 5; they are adapted to respectively receive a pin 6 associated with box 2 for guiding the movement of the anti-manipulation plate 14 inside box 2.
• the anti-manipulation plate 14 comprises a window 15 having an indented edge.
• the window has an inclined profile 16 defining at least one apex 17.
• two opposite inclined profiles define an apex 17.
• the position of apex 17 corresponds to overcoming of a groove 9 with reference to the opening movement of the safety pin 13 relative to the safety plates 4.
• the anti-manipulation plate 14 shown in the figure comprises two apices 17 corresponding to overcoming of the first and third grooves 9 respectively, with reference to the opening movement of the safety pin 13 relative to the safety plates 4 (see Fig. 5 illustrating an anti-manipulation plate between two safety plates) .
• Denoted at 18 is a displacement wing, in particular a lifting-up wing, extending transversely of the planar extension of the anti-manipulation plate 14.
• a displacement wing in particular a lifting-up wing, extending transversely of the planar extension of the anti-manipulation plate 14.
• two displacement wings 18 are provided which extend away from the plane of the anti-manipulation plate 14 towards opposite directions.
• the displacement wing 18 extends in such a manner that it is disposed transversely of at least one safety plate 4 parallel to the anti-manipulation plate 14 (Figs . 5-8 ) .
• displacement wing 18 is for example disposed at an upper edge of the anti-manipulation plate 14.
• the safety plate 4 drags along the anti-manipulation plate 14.
• the safety plate 4 rises, it drags along the anti- manipulation plate 14.
• the displacement wings 18 define constraint means between the anti-manipulation plate 14 (shield S) and at least one safety plate. Said constraint means is operative when passing to the enabling position of the safety plate.
• at least one first displacement (lifting) of the anti-manipulation plate 14 and correspondingly of shield S is therefore generated by displacement (lifting) of at least one safety place 4 instead of being generated by the key that, at the anti-manipulation plate 14, preferably has maximum piercing.
• Fig. 3 shows a permission position of shield S and the anti-manipulation plate 14 (an obstruction position of the shield S and the anti- manipulation plate 14 due to the action of the safety plates alone is not shown) .
• the inclined profile 16 is adapted to interact with the bolt member 12, in particular the safety pin 13, to make the anti-manipulation plate 14 further rise, for instance until it is disposed so that its apex 17 rests on the safety pin 13 (Fig. 4), on passage between the second position and first position of the bolt member 12.
• the inclined profile 16 terminates at a support position of the anti-manipulation plate 14 on the bolt member 12, at apex 17 for example.
• the inclined profile 16 defines a shaped profile adapted to (preferably further) lift the anti-manipulation plate to a further obstruction position (Fig. 4), as clarified when describing operation of the lock according to the present invention .
• the shaped profile 16 and safety pin 13 form translation cam means operating between the anti- manipulation plate 14 and the bolt member 12.
• the anti- manipulation plate 14 comprises a passage slot 19 for the key.
• the passage slot 19 is delimited by a closed profile P.
• the passage slot 19 comprises a first or upper portion 19a substantially closely following or comprising the area of the key passage port (in a plane parallel to the safety plates) and a second or lower portion 19b of varying width along the height H of the anti-manipulation plate.
• the term "height” it is intended the vertical size of the anti-manipulation plate with reference to Fig. 1 or 2; by width it is intended the horizontal size of the anti-manipulation plate with reference to Fig. 1 or 2, in the plane of the plate itself.
• the width of the lower portion 19b of slot 19 increases from a lower edge of the lower portion, in which it is smaller than the width L' of the passage port, until opening into the upper portion where it is the same as or greater than the width of the passage port.
• the lower portion 19b of slot 19 has at least one size smaller than the corresponding size of the passage port in the plane of the anti-manipulation plate.
• the lower portion 19b of slot 19 confines a portion of the anti-manipulation plate 14 defining said shield S.
• the anti-manipulation plate 14 comprises a passage opening for the key (having an open or closed profile) provided with a first portion substantially closely following or comprising the area of the key passage port and a second portion confining the shield.
• the anti- manipulation plate 14 is usually disposed to a height in which the upper portion 19a of slot 19 is aligned with opening 7 and is extended enough to closely follow or comprise such a passage port (Fig. 3) . If the anti- manipulation plate 14 lifts up as a result of raising of the safety plates 4 and possibly also due to the action of the safety pin 13, the lower portion 19b comes close to opening 7 (Fig.
• the shaped profile 16 and safety pin 13 form translation cam means operating between the anti- manipulation plate 14 and bolt member 12 to bring the shield S to at least one further obstruction position in which the passage port is further at least partly obstructed by the shield.
• the safety lock according to the present invention can comprise translation cam means operating between the shield S and the bolt member 12 to bring the shield S to at least a further obstruction position in which the passage port is further at least partly obstructed by the shield.
• a tensioning device similar to that denoted at T in Figs. 9-11 is inserted into opening 7 tensioning the bolt member 12 against the safety plates 4 and the anti-manipulation plate 12 in the opening direction of the lock (arrow A) .
• a rod provided with pins at one end is inserted, which rod raises all plates to the maximum lifting-up position.
• the rod is similar to that denoted at ST in Figs. 9-11.
• the anti-manipulation plate 14 (or generally the shield S) is raised by the manipulation instrument and the safety plates 4, thus partly obstructing the key passage port. Possibly partial sliding of the bolt member 12 according to arrow A causes further raising of the anti-manipulation plate 14 and further obstruction of the passage port (Fig. 3) .
• shield S can be mounted inside the safety lock in such a manner that it is shiftable even due to movement of the bolt member alone from the closed position to the open position causing the translation cam means to intervene.
• the constraint means between the anti-manipulation plate and the safety plates can be different, and lower wings on the safety plates adjacent to the anti-manipulation plate can be for example provided.
• the safety pin 13 has at least one recess 20 facing away from the lock pins (or the like), not shown.
• the recess 20 is for example formed with inclined cuts so as to create an upper hook-shaped portion 20a and a lower hook-shaped portion 20b.
• the recess is of rectangular shape.
• a lower tooth is alternated with an upper tooth.
• a safety plate can only comprise either upper teeth (see the second and fifth safety plates in Fig. 1 starting from cover 3) or lower teeth .
• Each tooth 21 defines a passage groove 9.
• At least one tooth (preferably the tooth corresponding to the first opening turn) comprises a recess 22 similar to that provided on the safety pin 13, for example.
• Recess 22 faces the bolt pins (or the like), not shown.
• the recess 22 is formed with cuts, for example inclined, so as to create at least one upper hooking portion 22a.
• the safety lock comprising a safety plate as previously described is provided with hooking means operating between the bolt member 12 and at least one safety plate 4, as a result of a thrust illicitly produced on the bolt member 12 (arrow A - Fig. 3) .
• the hooking means comprises at least one hook-shaped portion formed in the safety pin 13 of the bolt member 12, the hooking opening of which is preferably oriented according to the opening direction of the bolt member.
• two hook-shaped portions are formed: an upper hook-shaped portion and a lower hook-shaped portion.
• the hooking means comprises a hook-shaped portion formed in a tooth 21 of window 8 of the safety plate 4, preferably the hooking opening of which is oriented according to the closing direction of the bolt member.
• the opening of the hooking portion of the safety plate faces the bolt pins (or the like), not shown.
• the safety plate as previously described further comprises means suitable to enable rotation of the safety plate 4 in a plane parallel to the safety plate itself, when the safety plate is in a position of maximum lifting-up of the safety plate itself.
• at least one of the two slide slots 5, preferably the lower slot be adapted to enable rotation/inclination of the safety plate in the plane of the safety plate itself in the maximum lifting-up position.
• at least one slide slot 5, preferably the lower slot comprises an enlarged portion 23 in which pin 6 can be positioned enabling rotation of the safety plate in its own plane.
• Described hereinafter is operation of the safety lock comprising a safety plate as previously described, with reference to an illicit opening attempt using instruments of the new generation.
• the tensioning device T tensions the bolt member 12 against the safety plates 4 and the anti-manipulation plate 12 in the opening direction of the lock (arrow A) .
• the pusher discharges its thrust on the safety plate that, due to the enlarged portion 23 of the lower slide slot, can rotate in its own plane further helping in hooking the safety pin to the tooth of the safety plate.
• the safety plate is therefore locked to a height that does not correspond to the opening height so that the burglary instrument cannot detect the key double-sided profile .
• the present invention relates to a safety lock 1 comprising:
• a bolt member 12 movably mounted on the frame and shiftable by rotation of the key in the lock between a first position corresponding to an opening condition of the lock and a second position corresponding to a closed condition of the lock;
• At least one safety plate 4 slidably mounted on the frame and shiftable by rotation of the key in the lock to a movement-enabling position of the bolt member 12, wherein said key passage port is projected right through the lock identifying a free passageway for introduction of the key transversely of at least one safety plate 4,
• a shield S movably mounted on the frame and shiftable, due to displacement of the at least one safety plate 4, to an enabling position and/or of the bolt member 12 to the open position, between a permission position for passage of the key or other, in which said passage port is clear, and at least one obstruction position in which said passage port is at least partly obstructed by said shield S.
• the lock can be accomplished according to one or more of the following embodiments.
• the shield S is formed with an anti-manipulation plate 14 disposed parallel to the at least one safety plate 4.
• the anti- manipulation plate 14 comprises a passage opening 19 for the key provided with a first portion 19a that substantially closely follows or comprises the area of the key passage port and a second portion 19b confining said shield S.
• the passage opening is a passage slot 19 delimited by a closed profile P in which said second portion 19b has at least one smaller size than the corresponding size of the passage port in the plane of the anti-manipulation plate .
• the second portion 19b has an increasing width L starting from a lower edge, in which it is smaller than the width L' of the passage port, until opening into the first portion in which it is as large as, or larger than the width of the passage port.
• the anti- manipulation plate 14 comprises at least one displacement wing 18 extending transversely of the planar extension of the anti-manipulation plate itself, preferably two displacement wings 18 extending away from the plane of the anti-manipulation plate 14 towards opposite directions, said at least one or two wings arranging themselves transversely of at least one safety plate 4 parallel to the anti-manipulation plate 14 so that, due to movement of the safety plate 4, the safety plate 4 drags along the anti-manipulation plate 14.
• translation cam means is provided which operates between said anti- manipulation plate 14 and bolt member 12 to bring said shield S to at least another obstruction position in which said passage port is further at least partly obstructed by said shield.
• the anti- manipulation plate 14 comprises a window 15 for passage of a safety pin 13 of the bolt member 12, and the window 15 has at least one inclined profile 16 interacting with said safety pin 13 on passage between the second position and first position of the belt member 12.
• the inclined profile 16 terminates at a support position of the anti-manipulation plate 14 on the bolt member 12, an apex 17 for example.
• translation cam means is provided which operates between said shield S and bolt member 12 to bring said shield to at least one obstruction position in which said passage port is at least partly obstructed by said shield.
• the shield S has at least one profile S' that is substantially inclined and is adapted to generate a growing obstruction of the key passage port as a function of the shield position.

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• 2011
  • 2011-02-11 IT ITMI2011A000205A patent/IT1403932B1/it active
• 2012
  • 2012-01-31 LT LTEP12707915.0T patent/LT2673432T/lt unknown
  • 2012-01-31 WO PCT/IB2012/050438 patent/WO2012107855A1/en not_active Ceased
  • 2012-01-31 TR TR2018/03027T patent/TR201803027T4/tr unknown
  • 2012-01-31 RU RU2013141676/12A patent/RU2582944C2/ru active
  • 2012-01-31 EP EP12707915.0A patent/EP2673432B1/de active Active

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