EP0237172B2 - Dispositif de fermeture consistant en un cylindre de serrage et une clé plate associée - Google Patents

Dispositif de fermeture consistant en un cylindre de serrage et une clé plate associée Download PDF

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Publication number
EP0237172B2
EP0237172B2 EP87300939A EP87300939A EP0237172B2 EP 0237172 B2 EP0237172 B2 EP 0237172B2 EP 87300939 A EP87300939 A EP 87300939A EP 87300939 A EP87300939 A EP 87300939A EP 0237172 B2 EP0237172 B2 EP 0237172B2
Authority
EP
European Patent Office
Prior art keywords
key
recess
projection
surface portion
tumbler
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.)
Expired - Lifetime
Application number
EP87300939A
Other languages
German (de)
English (en)
Other versions
EP0237172B1 (fr
EP0237172A2 (fr
EP0237172A3 (en
Inventor
Heinz Wolter
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.)
Dom Sicherheitstechnik GmbH and Co KG
Original Assignee
Dom Sicherheitstechnik GmbH and Co KG
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
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Application filed by Dom Sicherheitstechnik GmbH and Co KG filed Critical Dom Sicherheitstechnik GmbH and Co KG
Priority to AT87300939T priority Critical patent/ATE45002T1/de
Publication of EP0237172A2 publication Critical patent/EP0237172A2/fr
Publication of EP0237172A3 publication Critical patent/EP0237172A3/en
Application granted granted Critical
Publication of EP0237172B1 publication Critical patent/EP0237172B1/fr
Publication of EP0237172B2 publication Critical patent/EP0237172B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
    • E05B27/0078—Asymmetrical tumbler pins, e.g. with a key operating on a radial protrusion of a tumbler pin
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
    • E05B27/0042—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in with additional key identifying function, e.g. with use of additional key operated rotor-blocking elements, not of split pin tumbler type
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
    • E05B27/10—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in operated by other surfaces of the key, e.g. openings receiving projections on the tumblers

Definitions

  • This invention is concerned with a locking device comprising a lock cylinder and a flat key wherein the cylinder has a housing in which a cylinder plug is rotatably accommodated together with a plurality of tumblers, the bug having a profiled keyway into which the tumblers project in the locked condition of the device, and wherein an additional tumbler is accommodated for sliding movement in a bore extending parallel to the longitudinal centre plane of the keyway, said additional tumbler projecting across the joint line between the plug and the housing when the device is in its locked condition.
  • the cylinder lock has the usual spring-pressed tumbler pins carried by the casing and normally having interlocking engagement with the plug and is further provided with an annular tumbler element carried by the plus and acted on by a spring which tends to force it outwardly into interlocking engagement with the casing, said annular tumbler element being constructed to be moved by the key in a direction parallel but opposite to that of the tumbler pins whereby when the key is inserted said element will be withdrawn from engagement with the casing and the tumbler pins will be withdrawn from the plug.
  • the annular tumbler element has a relatively complex shape and is relatively expensive to manufacture.
  • a second bore is required in the cylinder core, to accommodate the annular tumbler element, which further increases the difficulty and hence the cost of manufacture.
  • a locking device comprising a pin tumbler cylinder for a lock and a flat key
  • the key has, on its narrow side opposite to the back edge, notches for the arrangement of tumblers, a longitudinally extending guide groove is formed in one wide surface of the key adjacent the back edge thereof and a longitudinally extending recess is formed in the wide surface of the key
  • the cylinder has a housing in which a cylinder plug is rotatably accommodated together with a plurality of pin tumblers the plug having a profiled keyway into which the plug tumblers project in the locked condition of the device, and wherein an additional tumbler which has a projection which projects into the keyway is accommodated for sliding movement in a bore extending parallel to the longitudinal centre plane of the keyway, said additional tumbler projecting across the joint line between the plug and the housing when the device is in its locked condition and the projection of the additional tumbler is received in the recess when the key is inserted in the keyway
  • the side walls of the recess may run straight, or alternatively the side wall in which the first surface portion is formed may also have a re-entrant surface portion intermediate said first surface portion and the remote end of the recess.
  • the intermediate surface portion has a run-off slope and the second surface portion, formed in the other side wall, is disposed opposite said run-off slope.
  • the side wall in which the second surface portion is formed may have a re-entrant surface portion intermediate the second surface portion and the remote end of the recess, and further the other side wall may have a corresponding recessed portion disposed opposite thereto.
  • a plurality of additional tumblers may be provided, arranged one behind the other in the direction of key insertion, and the heightwise disposition of each projection on its tumbler is determined according to the position of the tumbler in the direction of key insertion and thus its position in relation to the portion of the recess with which it co-operates in the opening condition of the device (viz. when the key is inserted).
  • the two side walls provide a parallel-walled guide path for the projection.
  • the locking device in accordance with the invention, it will thus be appreciated that, when the key is inserted into the keyway of the cylinder, firstly the projection is engaged by the first run-in surface portion of the key and is lifted, together with the additional tumbler, during continued key insertion. As the key continues to be inserted, the second run-in surface portion then engages the projection, at the other side thereof, and ensures that it is cammed against the side wall in which the first surface portion is formed. At this stage the heightwise disposition of the tumbler is fully controlled, without the need for springs or other devices common in lock constructions. The projection is now held in the parallel-walled guide path and remains under control for the remainder of the key insertion, at the end of which the tumbler has freed the cylinder, which is thus now in its opening condition.
  • the second surface runs into the back edge of the key.
  • the bore in which the additional tumbler is accommodated opens at both ends into the surface of the plug, the length of the additional tumbler corresponding to the length of the bore and the projection being spaced from one end of the additional tumbler such that, in the opening condition of the device, the addtional tumbler is accommodated wholly within the bore.
  • the guide groove passes through, but is deeper than, the recess.
  • the guide groove still can serve its function without interfering in any way with the operation of the recess, and further without the recess and projection having any detrimental effect on the guidance of the key.
  • the appropriately arranged inclined run-in surface portions are effective, when the key is inserted, forcibly to operate the projection.
  • means e.g. springs or the like, whereby a particular end position is determined.
  • the function is highly certain.
  • the offset of the first run-in surface portion from the tip of the key is quite small.
  • Usual keys having the same locking function and profile would on the other hand collide with the projection, producing a barring effect, since their tip is relatively thicker in the direction of insertion. Modification of the key tip, however, e.g. to avoid operating the additional tumbler, would result not only in failure to release the latter, but also in prevention of the operation of the cylinder cam (or thrower), quite apart from difficulties in initial insertion of the key and in the normal operation of the tumbler pins.
  • the control function of this second edge begins at a zero position, viz. in the plane of the joint line end of the cylinder plug, which is advantageous in terms of the control of the heightwise disposition of the additional tumbler.
  • the depth of the recess is smaller than that of the guidance groove passing therethrough. In this way no grooving beyond the usual amount arises at the recessed wide face of the key because of the recess; the key blade thus retains its stability.
  • the lock cylinder 1 shown is a double cylinder having a cylinder housing 2 which supports in a middle section 3 a cam (or thrower) 4.
  • a cylinder plug 5 is journalled and is connected to the cam upon insertion of a key 6.
  • the intermediate connection element (not described in detail) is engaged by the insertion-end tip Sp of the key blade 7 to operate it.
  • Each cylinder plug 5 (one only of which is hereinafter described) has a keyway 8 suited to the cross-sectional profile of the key.
  • Radially disposed plug pins 9 project into the keyway, being aligned, when the flat key 6 is removed, with housing pins 10 which are urged by compression springs 11 in the direction of the cylinder plug 5. In the embodiments five such tumblers are provided for each cylinder plug.
  • the blade 7 of the flat key 6 has on both wide sides profiled variation grooves 12 extending in the direction of key insertion and profile variation ribs 13 adjacent thereto. Extending in opposed relation to the back edge 14 of the key blade 7, which is matched accurately to the cylindrical shape of the cylinder plug 5, are V-cuts 15 of different depths. The axial distance between the bottom of adjacent cuts is however the same in each case. All the V-cuts 15 end spaced from a guide section of the key blade 7 in the zone of which, near to the back, extends a continuous guide groove 16. A base 16' of the latter extends right into the region of a longitudinal central plane A-B of the flat key blade 7, which plane also corresponds to the like-designated plane of symmetry of the locking device.
  • the tip Sp of the key blade 7 is, as can be seen in the drawings, cut in a peak-shape such that two diverging end surfaces, including an angle of less than 90°, lie adjacent a slightly convex-shaped first zone forming the tip Sp, the upper of which end surfaces runs into the back edge 14 and the lower into the start of the first V-cut.
  • the tip end region of the guide groove 16 (see Fig. 5) has formed therein a widened portion or recess E which is open up to the tip Sp.
  • a projection N is arranged on an additional tumbler 17 which faces the key blade 7, said projection projecting transversely into the keyway 8.
  • the additional tumbler 17 is accommodated in a bore 18 of the cylinder plug 15, which bore runs parallel to the longitudinal centre plane A-B of the keyway 8.
  • the recess E has two outwardly inclined run-in surface portions, each leading into a side wall of the recess.
  • the key tip end of one side wall 19 of the recess E lying at the V-cut side of the recess, has formed therein a first inclined run-in surface portion I, the angle of inclination of which is about 45°.
  • the key tip end a of this surface portion I is in planar alignment with the underside 20 of the projection N, or lies slightly therebeneath.
  • This basic orientation of the additional tumbler 17 is defined by supporting the underside 20 of the projection N on a bottom edge 21 of a cut-out 22 formed in the cylinder plug 5 (see Fig. 7), which cut-out intersects the keyway 8.
  • the locking recess 23 is machined through an aligned bore 24 provided in the cover of the cylinder housing 2, which bore can then be plugged.
  • the key tip end of the other side wall of the recess E has formed therein a second run-in surface portion II, disposed at a greater distance from the tip Sp than the first surface portion I.
  • the distance y of said second surface portion II from the end 26, remote from the key tip, of the recess E is greater than the dimension, measured in the direction of key insertion, of the projection N .
  • the end 26 of the recess E forms an end cut-out designated E', which is rounded off, e.g. to conform to a rounded projection shape (not shown in detail).
  • the projection N is generally rectangular in cross-section with bevels 27 formed at the edges, the bevel engaging the end a of the first surface portion I enabling the additional tumbler 17 to be operated smoothly.
  • the two run-in surface portions I, II form a reception funnel which is closely adjacent to the tip and from which the recess E extends with straight parallel sides up to the end 26.
  • the first embodiment shown in Fig. 5 has a more complex arrangement in that the side wall forms in combination with the first run-in surface portion I a guide path having a re-entrant portion 19 lying more closely to the back edge 14 of the key 6.
  • the guide path thus runs into the end cut-out E' of the recess E, running parallel to the second run-in surface portion II, and indeed is arranged first descending and then extending straight. This shape therefore operates in altogether three planes.
  • the first plane which allows the key to move beneath the projection N by virtue of the end a of the first surface portion I, runs into a higher plane defined by the wall portion 19.
  • an upper end 17'' of the additional tumbler 17 enters the bore 24 of the cylinder housing cover.
  • the guide path then has a descending portion defined by a run-off surface portion 28, which runs parallel with the second surface portion II, the guide path thus leading to the end cut-out E', which forms the third plane in which the additional tumbler 17 no longer projects beyond the lock cylinder joint line F (see Fig. 8).
  • the lower end 17' of the additional tumbler 17 is cut back at the inner side 17''' (see Figs.
  • the cylinder plug 5 is now rotatable. As can be seen in Fig. 8, the distance of the projection N from the upper end surface of the additional tumbler 17 is of the same dimension as the heightwise distance of the guide path from the back edge of the key.
  • the second embodiment differs from the aforedescribed merely in that the end cut-out E' of the recess E rises again in the region of the end 26; the guide path is thus wave-shaped in this case.
  • the recess E extends over a region of two V-cuts 15.
  • two or even more additional tumblers 17 may be provided, lying one behind the other in the direction of insertion of the key 6, and each having a projection N; the distance by which, in the opening condition, each projection lies from the back edge 14 is thus determined by its position along the keyway.
  • the planes associated with said tumblers are designated C-D and G-H and are disposed on lands between the conventional tumblers 10/11.

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  • Lock And Its Accessories (AREA)
  • Chairs Characterized By Structure (AREA)

Claims (9)

  1. Dispositif de fermeture comprenant un barillet (1) à goupille pour une serrure et une clé plate (6) dans lequel la clé (6) possède sur son côté étroit opposé à l'arête de dos (14), des encoches (15) destinées à loger des goupilles, une rainure de guidage (16) s'étendant longitudinalement est réalisée sur une surface large de la clé (6) voisine de son arête de dos (14) et un évidement (E) s'étendant longitudinalement est réalisé sur la surface large de la clé (6), le barillet (1) comprend un stator (2) dans lequel un rotor de barillet (5) est logé mobile en rotation, avec une pluralité de goupilles (9, 10), et possède une entrée de clé profilée (8) dans laquelle les goupilles (9) sont engagées, dans l'état fermé du dispositif, et dans lequel une goupille additionnelle (17) posséde un mentonnet (N) qui s'étend dans l'entrée de clé (8), est logé pour décrire un mouvement de coulissement dans un perçage (23) qui s'étend parallèlement au plan médian (A-B) longitudinal de l'entrée de clé (8), cette goupille additionnelle (17) s'étendant en travers de la ligne de joint entre le rotor (5) et le stator (2) lorsque le dispositif est dans son état fermé, et le mentonnet (N) de la goupille additionnelle (17) est reçu dans l'évidement (E) lorsque la clé (6) est insérée dans l'entrée de clé (8), dans lequel, la rainure de guidage (16) s'étend à travers l'évidement (E) et est plus profonde que celui-ci, et une extrémité de l'évidement (E) s'ouvre dans la pointe de la clé (Sp) et chacune des parois latérales longitudinales de l'évidement (E) est munie, à son extrémité côté pointe de clé, d'une portion de surface d'entrée inclinée vers l'extérieur (I, II), une première (I) des portions de surface aboutissant dans la pointe (Sp) et la deuxième (II) étant placée en arrière de la première (I), et dans lequel le mentonnet (N) de la goupille additionnelle (17) est attaqué tour à tour par les deux portions de surface d'entrée (I, II), et se loge ainsi dans l'évidement (E) formé dans la clé (6), lorsque cette dernière est insérée dans l'entrée de clé (8), la distance (y) de la deuxième portion (II) de surface à l'extrémité (E') de l'évidement (E) qui est éloigné de la pointe de clé (Sp) étant plus grande que la dimension du mentonnet, mesuré dans la direction de la longueur de l'entrée de clé (8), cependant que la distance (x) entre les parois latérales de l'évidement (E), mesurée à ladite extrémité éloignée, et la dimension en hauteur du mentonnet (N) étant propre à établir un ajustement serré entre le mentonnet (N) et cette extrémité (E') de l'évidement (E).
  2. Dispositif selon la revendication 1, caractérisé en ce que les parois latérales de l'évidement (E) s'étendent en ligne droite.
  3. Dispositif selon la revendication 1, caractérisé en ce que la paroi latérale dans laquelle la première portion de surface (I) est formée possède en outre une portion de surface rentrante (19) qui est intermédiaire entre ladite première portion de surface (I) et l'extrémité éloignée (E') de l'évidement (E).
  4. Dispositif selon la revendication 3, caractérisé en ce que la portion de surface intermédiaire (19) présente une pente de sortie (28) et en ce que la deuxième portion de surface (II) formée dans l'autre paroi latérale est disposée en face de cette pente de sortie (28).
  5. Dispositif selon la revendication 1, caractérisé en ce que la paroi latérale dans laquelle la deuxième portion de surface (II) est formée possède une portion de surface rentrante (19) entre cette deuxième portion de surface (II) et l'extrémité éloignée (E') de l'évidement (E) et en ce que l'autre paroi latérale présente une portion creusée correspondante disposée en face de cette portion rentrante.
  6. Dispositif selon la revendication 5, caractérisé par une série de goupilles additionnelles (17) disposées l'une derrière l'autre dans le sens de l'insertion de la clé et en ce que la disposition en hauteur de chaque mentonnet (N) sur sa goupille (17) est déterminée en fonction de la position de la goupille (17) dans le sens de l'insertion de la clé et, par conséquent, en fonction de sa position par rapport à la portion de l'évidement (E) avec laquelle elle coopère dans l'état ouvert du dispositif.
  7. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce que les deux parois latérales forment une piste de guidage à parois parallèles pour le mentonnet (N).
  8. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce que cette deuxième portion de surface (II) aboutit dans l'arête de dos (14) de la clé (6).
  9. Dispositif selon une quelconque des revendications précédentes, caractérisé en ce que le perçage (23) dans lequel la goupille additionnelle (17) est logée s'ouvre à ses deux extrémités dans la surface du rotor (5), en ce que la longueur do la goupille additionnelle (17) correspond à la longueur du perçage (23) et en ce que le mentonnet (N) est espacé d'une première extrémité de la goupille additionnelle (17) d'une distance telle que, dans l'état ouvert du dispositif (c'est-à-dire lorsque la clé (6) est insérée, la goupille additionnelle (17) soit entièrement contenue dans le perçage (23).
EP87300939A 1986-02-06 1987-02-03 Dispositif de fermeture consistant en un cylindre de serrage et une clé plate associée Expired - Lifetime EP0237172B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87300939T ATE45002T1 (de) 1986-02-06 1987-02-03 Aus schliesszylinder und assoziiertem flachen schluessel bestehende verschlusseinrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863603687 DE3603687A1 (de) 1986-02-06 1986-02-06 Aus schliesszylinder und zugehoerigem flachschluessel bestehende schliesseinrichtung
DE3603687 1986-02-06

Publications (4)

Publication Number Publication Date
EP0237172A2 EP0237172A2 (fr) 1987-09-16
EP0237172A3 EP0237172A3 (en) 1988-01-07
EP0237172B1 EP0237172B1 (fr) 1989-07-26
EP0237172B2 true EP0237172B2 (fr) 1995-04-05

Family

ID=6293538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87300939A Expired - Lifetime EP0237172B2 (fr) 1986-02-06 1987-02-03 Dispositif de fermeture consistant en un cylindre de serrage et une clé plate associée

Country Status (6)

Country Link
EP (1) EP0237172B2 (fr)
KR (1) KR960001856B1 (fr)
AT (1) ATE45002T1 (fr)
DE (2) DE3603687A1 (fr)
ES (1) ES2010210T5 (fr)
IN (1) IN170447B (fr)

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Also Published As

Publication number Publication date
DE3603687A1 (de) 1987-08-13
KR870008093A (ko) 1987-09-24
ATE45002T1 (de) 1989-08-15
EP0237172B1 (fr) 1989-07-26
EP0237172A2 (fr) 1987-09-16
ES2010210T5 (es) 1995-08-16
EP0237172A3 (en) 1988-01-07
DE3760370D1 (en) 1989-08-31
ES2010210B3 (es) 1989-11-01
DE3603687C2 (fr) 1988-09-22
KR960001856B1 (ko) 1996-02-06
IN170447B (fr) 1992-03-28

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