EP2532811A1 - Verrou de sécurité à double panneton - Google Patents

Verrou de sécurité à double panneton Download PDF

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Publication number
EP2532811A1
EP2532811A1 EP12171235A EP12171235A EP2532811A1 EP 2532811 A1 EP2532811 A1 EP 2532811A1 EP 12171235 A EP12171235 A EP 12171235A EP 12171235 A EP12171235 A EP 12171235A EP 2532811 A1 EP2532811 A1 EP 2532811A1
Authority
EP
European Patent Office
Prior art keywords
tumblers
lock according
tumbler
lock
shaped
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12171235A
Other languages
German (de)
English (en)
Inventor
Lorenzo Tacchino
Nicolas Loyau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cr Serrature SpA
Original Assignee
Cr Serrature SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cr Serrature SpA filed Critical Cr Serrature SpA
Publication of EP2532811A1 publication Critical patent/EP2532811A1/fr
Withdrawn legal-status Critical Current

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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
    • E05B17/00—Accessories in connection with locks
    • E05B17/20—Means independent of the locking mechanism for preventing unauthorised opening, e.g. for securing the bolt in the fastening position
    • E05B17/2084—Means to prevent forced opening by attack, tampering or jimmying
    • E05B17/2092—Means responsive to tampering or attack providing additional locking

Definitions

  • the present invention relates to double-bit locks which are typically used in environments where it is required to ensure the greatest possible protection against attempted break-ins.
  • such a lock comprises a box-shaped body inside which a bolt slidable along a first direction and a set of adjacent tumblers (or “gorges”) movable along a second direction orthogonal to the first direction are housed, each tumbler having a toothed opening, a recess and an upper slot and a lower slot.
  • a pin which protrudes transversely from the bolt passes through all the openings
  • a first guiding pin fixed to the box-shaped body passes through all the upper slots
  • a second guiding pin fixed to the box-shaped body passes through all the lower slots.
  • the object of the present invention is therefore to provide a lock able to withstand effectively fraudulent opening attempts by means of sensing, overcoming the drawbacks of the prior art.
  • the lock according to the invention has external dimensions equivalent to those of a conventional lock, reproducing to a large extent the general structure of the latter with minimal and low-impact modifications. Consequently, it offers the advantage of ensuring the abovementioned security, without the need for manufacturing technology substantially different from conventional technology and without generating additional costs.
  • the lock according to the invention has the advantage that it may be made from a conventional non-security lock in a very simple manner. For this purpose it is in fact sufficient to replace the internal tumblers of the lock with modified tumblers which have a wider upper slot so as to be able to house the abovementioned auxiliary element, and further to fix the aforementioned catch device inside the box.
  • the present invention therefore also relates to a kit for upgrading conventional locks, which can be installed in a simple and easy manner and which comprises the modified tumblers, the auxiliary element and the catch device.
  • a security lock comprises ( Figs. 1-7 ) a box-shaped body 10 which houses a bolt 12 slidable along a first substantially horizontal direction and a set of adjacent tumblers 14a, 14b normally movable along a second substantially vertical direction, orthogonal to the first direction.
  • the bolt 12 comprises a body or carrier in which a recess 16 is formed and from which there protrudes a plurality of locking heads 20 able to penetrate inside seats formed in a wall which defines an aperture closed by a shutter on which the lock is mounted (not shown in the figures).
  • a key 18 rotated by a user may act on the edges of the recess 16 so as to open/close the lock.
  • the set of tumblers 14a, 14b is formed by two external tumblers 14a and four internal tumblers 14b.
  • the number of tumblers 14a, 14b could be different, for example between 3 and 9, in particular between 5 and 7.
  • Each external tumbler 14a - the structure of which is entirely conventional - has a substantially rectangular form with a perimeter formed by two long sides and two short sides. An upper slot 22 and a lower slot 24 are formed in the two short sides, respectively. A recess 26, on the edge of which the bit of the key 18 may act, is formed in one of the long sides.
  • Each tumbler 14a also has a generally rectangular-shaped opening 30, the long sides of which have projecting teeth 32 and are parallel to the short sides of the tumbler 14a.
  • Each internal tumbler 14b has a structure which corresponds exactly to that of the external tumblers 14a, except for the fact that its upper slot 22 has a width greater than the width of the upper slot 22 of the external tumblers 14a and that the long side opposite to that in which the recess 26 is formed has a knurled upper section 34.
  • a respective wire spring 28 normally biases each tumbler 14a, 14b downwards.
  • An auxiliary element 36 ( Fig. 12 ) which has a parallelepiped shape and has a substantially horizontal eyelet-shaped through-hole 38 is located inside the upper slot 22 of all the internal tumblers 14b.
  • a first guiding pin 40 fixed to the box-shaped body 10 passes through the upper slots 22 of all the tumblers 14a, 14b, and in particular through the eyelet-shaped hole 38 of the auxiliary element 36 inserted inside the slots of the tumblers 14b.
  • the upper slots 22 of the external tumblers 14a have a width corresponding to that of the pin 40, which is instead smaller than the width of the eyelet-shaped hole 38.
  • a second guiding pin 42 fixed to the box-shaped body 10 passes through the lower slots 24 of all the tumblers 14a, 14b, the width of which corresponds to that of the pin 42.
  • a pin 44 which protrudes transversely from the carrier of the bolt 12, passes through the openings 30 of all the tumblers 14a, 14b.
  • a catch device is associated with the box-shaped body 10 and comprises ( Figures 13-17 ) a first element 46 fixed by means of screws 48 to the box-shaped body 10 and a second element 50 pivoted under the biasing action of elastic means, such as a helical spring 52, inside a cavity of the first element 46 about a pivot 54.
  • elastic means such as a helical spring 52
  • the bottom wall of the cavity is inclined slightly so as to allow a slight rotation of the element 50 about the pivot 54 which passes through the holes formed in the two elements 46, 50.
  • the second element 50 has, on the edge facing the internal tumblers 14b, a knurling 56 suitable for coupling with the knurled upper section 34 formed on one side of said tumblers.
  • the key 18 which has a double bit with a certain profile of recesses and projections is inserted inside the keyhole and is rotated.
  • the interaction of one of the bits of the key 18 with the edge of the recesses 26 causes, during a first arc of rotation through about 90° ( Fig. 8 ), the movement of the tumblers 14a, 14b in the second direction, namely the vertical direction, which is guided by the engagement of the pins 40, 42 inside the upper slots of the external tumblers 14a, and inside the lower slots of all the tumblers 14a, 14b, respectively, although being of a different magnitude for the single tumblers 14a, 14b depending on the shape of the bit of the key 18.
  • the openings 30 in the tumblers 14a, 14b are positioned so that the pin 44 has immediately in front of it a free section of all the openings 30, namely without projecting teeth 32. Therefore, during the subsequent arc of rotation through about 90° the key 18, which biases the edge of the recess 16 formed in the carrier of the bolt 12, causes the displacement of the latter since the pin 44 integral therewith may freely move along the first section of the openings 30 without being hindered by any projecting tooth 32. Consequently, the teeth 20 of the bolt 12 move over a corresponding length ( Fig. 9 ).
  • the thief inserts simultaneously into the key-hole of the lock a first tool which pushes against the recess 16 in the carrier of the bolt 12 and a second tool able to detect the configuration of the teeth in the openings 30 of the tumblers 14a, 14b.
  • the second tool acts in each case on the various tumblers of the set with incorrect coding heights. Therefore, when it acts on one of the internal tumblers 14b, the latter moves independently of the other ones without being able to be guided by the pin 40 relative to which the eyelet-shaped hole 38 moves and which could only act as a guide for its movement when there was a correct movement also of the external tumblers 14a of the set, the upper slot 22 of which has a width corresponding to the size of the pin 40 which thus acts as a guide. Consequently, the tumbler 14b, instead of moving in the vertical direction, allowing deciphering of its coding, performs a movement with a horizontal component which is made possible by the presence of the eyelet-shaped hole 38.
  • This displacement in the horizontal direction causes coupling of the knurled upper section 34 of one side thereof with the knurling 56 of the second element 50 of the catch device.
  • the element 50 may pivot slightly around the pivot 54 so as to allow perfect mating of the knurlings 34, 56 which opposes even more effectively displacement of the tumbler 14b. In this way, sensing is prevented and any attempt at deciphering the coding is thwarted.
  • a conventional lock may be easily converted into a lock according to the invention, by simply replacing the internal tumblers with modified tumblers 14b as described above and adding thereto the auxiliary element 36 and the catch device.

Landscapes

  • Electrophonic Musical Instruments (AREA)
  • Lock And Its Accessories (AREA)
EP12171235A 2011-06-09 2012-06-08 Verrou de sécurité à double panneton Withdrawn EP2532811A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000510A ITTO20110510A1 (it) 2011-06-09 2011-06-09 Serratura a doppia mappa con sicurezza anti-palpeggio

Publications (1)

Publication Number Publication Date
EP2532811A1 true EP2532811A1 (fr) 2012-12-12

Family

ID=44555017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12171235A Withdrawn EP2532811A1 (fr) 2011-06-09 2012-06-08 Verrou de sécurité à double panneton

Country Status (2)

Country Link
EP (1) EP2532811A1 (fr)
IT (1) ITTO20110510A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600071113A1 (it) * 2016-07-08 2016-10-08 Giuseppe Scarparo Serratura di sicurezza con chiave a doppia mappa perfezionata
IT201900003473A1 (it) * 2019-03-11 2020-09-11 Juwel S R L Piastrino per serratura perfezionato.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903455A2 (fr) 1997-09-18 1999-03-24 Costruzioni Italiane Serrature Affini C.I.S.A. S.p.A. Dispositif anti-effraction pour une serrure à gorges
WO2009057170A1 (fr) 2007-10-31 2009-05-07 Cisa S.P.A. Serrure anti-effraction

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903455A2 (fr) 1997-09-18 1999-03-24 Costruzioni Italiane Serrature Affini C.I.S.A. S.p.A. Dispositif anti-effraction pour une serrure à gorges
WO2009057170A1 (fr) 2007-10-31 2009-05-07 Cisa S.P.A. Serrure anti-effraction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600071113A1 (it) * 2016-07-08 2016-10-08 Giuseppe Scarparo Serratura di sicurezza con chiave a doppia mappa perfezionata
IT201900003473A1 (it) * 2019-03-11 2020-09-11 Juwel S R L Piastrino per serratura perfezionato.

Also Published As

Publication number Publication date
ITTO20110510A1 (it) 2012-12-10

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