EP2865825B1 - Cylinder lock arrangement - Google Patents

Cylinder lock arrangement Download PDF

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Publication number
EP2865825B1
EP2865825B1 EP13190048.2A EP13190048A EP2865825B1 EP 2865825 B1 EP2865825 B1 EP 2865825B1 EP 13190048 A EP13190048 A EP 13190048A EP 2865825 B1 EP2865825 B1 EP 2865825B1
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EP
European Patent Office
Prior art keywords
fixation
lock
cylinder
pin
lock cylinder
Prior art date
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EP13190048.2A
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German (de)
English (en)
French (fr)
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EP2865825A1 (en
Inventor
Daniel Andersson
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.)
Assa Abloy Opening Solutions Sweden AB
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Assa AB
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Priority to DK13190048.2T priority Critical patent/DK2865825T3/da
Priority to EP13190048.2A priority patent/EP2865825B1/en
Publication of EP2865825A1 publication Critical patent/EP2865825A1/en
Application granted granted Critical
Publication of EP2865825B1 publication Critical patent/EP2865825B1/en
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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B9/00—Lock casings or latch-mechanism casings ; Fastening locks or fasteners or parts thereof to the wing
    • E05B9/08—Fastening locks or fasteners or parts thereof, e.g. the casings of latch-bolt locks or cylinder locks to the wing
    • E05B9/082—Fastening locks or fasteners or parts thereof, e.g. the casings of latch-bolt locks or cylinder locks to the wing with concealed screws
    • 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
    • E05B15/16—Use of special materials for parts of locks
    • E05B15/1614—Use of special materials for parts of locks of hard materials, to prevent drilling

Definitions

  • the invention relates to a lock cylinder arrangement intended and arranged for being fixed to a lock casing and for control of a lock mechanism arranged in the lock casing.
  • the invention also relates to a lock arrangement comprising such a lock cylinder arrangement.
  • mortise locks for doors, windows, gates and the like are often designed as mortise locks.
  • mortise locks comprise a lock case which forms a housing for a lock mechanism and which, when mounted to the door or the like is recessed or mortised into a cavity arranged in the door blade.
  • the lock mechanism comprises movable parts such as cylinder followers and link arrangements which are mechanically connected to one or several bolts e.g. a latch bolt and/or a dead bolt, which bolts may be arranged inside or outside of the lock case.
  • a lock cylinder may be fixed to the lock case and connected to the lock mechanism.
  • the lock cylinder comprises a cylinder housing and a cylinder core, sometimes called cylinder plug, which is rotatably accommodated in an axial bore of the cylinder housing.
  • the cylinder housing may also be referred to as a stator and the core may be referred to as a rotor.
  • the core is connected to the lock mechanism such that the bolt or bolts may be manoeuvred by rotation of the core.
  • the core may e.g. be connected to a cylinder follower arranged in the lock case by means of a tailpiece which is fixed to that axial end of cylinder core which lies proximal to the lock case, when mounted.
  • movement of the bolts is achieved by manoeuvring of a special manoeuvring device, such as a handle, a knob or an electrical arrangement.
  • a special manoeuvring device such as a handle, a knob or an electrical arrangement.
  • the cylinder core is connected to blocking means comprised in the lock mechanism.
  • the blocking means is arranged to selectively allow and prevent manoeuvring of the bolt and may be controlled by means of rotating the cylinder core.
  • the lock cylinder may be arranged such that an authorisation is required for admitting manoeuvring of the bolts.
  • Such an authorization may be accomplished in many different ways, e.g. mechanically, electrically or by a combination of electrical and mechanical means.
  • the lock cylinder is normally then provided with a set of pin tumblers which are dispalceably received in pin tumbler chambers arranged in the cylinder housing and in the core.
  • the cylinder core exhibits an axially arranged key channel into which a mechanical key with a code surface may be inserted.
  • the code surface acts as a cam and displaces or lifts the pin tumblers. If a correct or authorized key is inserted the pin tumblers are displaced to positions such that no pin tumbler extends between the pin tumbler chambers arranged in the cylinder housing and the cylinder core. Thereby the core is allowed to be rotated in order to manoeuver the lock mechanism.
  • the lock cylinder may be provided with electronic authorization control means, such as a key pad for entering a code or an RFID reader for detecting a code transmitted from an RFID transmitter worn by the user.
  • electronic authorization control means such as a key pad for entering a code or an RFID reader for detecting a code transmitted from an RFID transmitter worn by the user.
  • lock cylinders may be arranged to prevent rotation of the core relative to the housing if no authorized code has been presented.
  • the manoeuvring of the lock mechanism by means of rotating the core may however also be selectively allowed and prevented by other means.
  • the core may be connected to the tail piece by means of a coupling device which selectively connects and disconnects the core with the tail piece in response to whether or not an authorized code has been presented. If no authorized code has been presented the core is disconnected from the tail piece such that rotation of the core is not transmitted to the tail piece or the loch mechanism, whereby the lock mechanism may not be manoeuvred or controlled by rotating the core.
  • the cylinder core may comprise various different means for bringing about rotation. Instead of being provided with a key channel for insertion of a key which is used for rotating the core, it may comprise or be connected to a knob, a thumb turn, a handle or any electrical means such as a motor or a solenoid for rotating the core.
  • the present invention is applicable to all the above mentioned exemplifying variations and uses of a lock cylinder arrangement.
  • Fig. o illustrates a previously known door lock of the above described type which comprises a lock cylinder arrangement.
  • the known lock comprises a lock case 100 that is recessed in a door leaf which has a high security outside 101 and an inside 102, which forms a lower security or convenient side of the door.
  • a first lock cylinder 103a is fixed to the inside of the lock case and a second cylinder 103b is fixed to the outside of the lock case.
  • the two lock cylinders each have a cylinder housing and a core 104 which is rotatable in the cylinder housing.
  • the core has a key channel. When a correct key is inserted into the key channel, the core can be rotated relative to the cylinder housing by turning the key.
  • the core's rotational movement is transferred to a cylinder follower in the lock case 100 by means of a tail piece 105 which is fixed to the end portion of the core 104, which end faces the lock case 100.
  • Rotation of the cylinder follower in turn affects a locking mechanism in the lock case for actuating a bolt 106 and a latch 107.
  • the two cylinders are fixed to the lock housing using screws 108 which are inserted from the inside through the inner cylinder 103a and the lock housing 100 and which, from the inside, are screwed into threaded holes arranged in the outer cylinder 103b.
  • EP o 072 803 B1 describes another example of such an arrangement.
  • These arrangements have the advantage of that the mounting screws are not accessible from the outside of the door, which outside should exhibit a high degree of security.
  • the arrangements however, have the serious disadvantage in that a specific cylinder cannot be used both on the outside and on the inside. They are thus not, what in the industry is known as reversible. Instead, the cylinders must be designed either as outside cylinders with threaded non through holes or as internal cylinders with through holes which are provided with internal stops for axial support of the mounting screw heads.
  • reversible cylinders which are designed as the above described interior cylinder (103a).
  • the exterior and the interior cylinders are then fixed to the lock housing by means of the respective sets of mounting screws being inserted through each cylinder from the end facing away from the lock case and screwed into threaded holes arranged in the lock case.
  • the cylinder is made reversible whereby one and the same cylinder can be used on both the outside and the inside of the door.
  • the arrangement has however the disadvantage that the mounting screws are accessible from the outside of the door, which seriously reduces the security.
  • US 6,860,129 discloses another lock arrangement comprising an outer and an inner lock cylinder and a lock core.
  • the outer lock cylinder is secured to the lock core by means of an outer sleeve, an outer collar provided with locking notches and a locking pin.
  • a head of the locking pin is received in the locking notches and the pin extends through the lock core such that an end of the pin is in contact with an inner collar of the lock arrangement.
  • drill protection normally consists of plates and / or rods which are formed in a high strength material and which are introduced in various particularly sensitive parts of the lock cylinder to prevent these parts, through drilling in the lock cylinder, from being removed or destroyed in order to force the lock.
  • US 6,301,942 discloses a lock cylinder provided with drilling protection organs.
  • a problem with prior art drilling protection is that it is complicated and space-consuming to obtain a good fixation of the drilling protection parts in the lock cylinder.
  • a decorative cylinder ring 109a, 109b is arranged around the cylinder 103a, 103b on the outside of the door.
  • the cylinder ring 109 may be internally threaded and secured to the cylinder by being threaded onto an external thread provided on the envelope surface of the lock cylinder.
  • the cylinder ring 109 may be fixed to the cylinder by being slipped onto the outside and fixed in position with a radially disposed small fixing screw which is screwed into contact with envelope surface of the lock cylinder.
  • the function of the cylinder ring 109 is to cover the hole in the door through which the cylinder protrudes and thus to provide a neat installation.
  • a decorative cover or cap 110a, 110b can be applied around the cylinder, radially inside cylinder ring, so that the entire lock cylinder, apart from the key channel mouth is concealed under cover.
  • the cap 110a, 110b can be fixed by means of the cylinder ring fixing screw extending through a slot in the cap 110 or by a simple resilient snap element which is snapped into a designated recess in the envelope surface of the lock cylinder.
  • US 7,389,660 discloses another known arrangement for fixation of a cylinder ring to a lock cylinder.
  • the screw protection means may comprise a plug or the like which covers at least one mounting screw by which the lock cylinder is fixed to the lock casing.
  • the plug is arranged at that end of the screw which is used for inserting a screw driver or any other tool for screwing the mounting screw when mounting and dismounting the lock cylinder.
  • the lock cylinder may further be provided with plug locking means which prevent removal of the plug when the cylinder core is in a locked state and which allow removal of the plug when the core has been rotated to an unlocked state.
  • EP o 072 803 B1 discloses a previously known screw protection means comprising a plug of the above described type, which plug is provided with a waist portion.
  • a radially displaceable pin is arranged in a radial bore of the lock housing.
  • a corresponding radial bore is arranged in the lock core.
  • An outward end of the pin may be brought in and out of engagement with the waist portion of the plug to thereby respectively prevent and allow removal of the plug.
  • the pin is displaceable out of engagement with the waist portion only when the cylinder core has been rotated, buy means of an authorized key, such that the two radial bores are in register with each other.
  • This known screw protection arrangement thus provides for that only persons being in possession of an authorized key are able to remove the plug and to dismount the mounting screws.
  • the known arrangement however exhibits some disadvantages in that it is comparatively complicated to manufacture a cylinder housing and a core with said radial bores.
  • the pin and bores further requires comparatively large space within the cylinder housing and the core and the arrangement requires a comparatively large number of movable parts.
  • Another object is to provide such a lock cylinder arrangement wherein several drill protection members of different type may be held in place by means of one and the same fixation device.
  • a still further object is to provide such a lock cylinder arrangement wherein fixation devices already used for fixation of the lock cylinder to a lock case may be used also for securing the drill protection members in position.
  • the lock cylinder arrangement is intended for fixation to a lock casing and for control of a lock mechanism arranged in the lock casing.
  • the lock cylinder arrangement comprises a cylinder housing having a first axial end arranged to be positioned distal to the lock casing and a second axial end being opposite to the first axial end and arranged to be positioned proximal to the lock casing.
  • a cylinder core is rotatably accommodated in the cylinder housing.
  • a number of fixation bores extends axially through the lock cylinder, from the first axial end to the second axial end.
  • a corresponding number of fixation devices are arranged for fixation of the cylinder housing to the lock casing, each fixation device being arranged to extend through a respective bore.
  • a number of drill protection members are each removably received in a corresponding recess arranged in the cylinder housing. The drill protection members are fixed in position in their respective recesses by means of said fixation devices.
  • the drill protection members comprise an outwardly convex end of a head portion of a first fixation member received in a mouth portion of a fixation bore.
  • the drill protection members may alternatively or additionally comprise a plate member which is received in a recess formed in the first axial end of the cylinder housing.
  • At least one fixation device may then comprises a first fixation member with a first head portion which first head portion is received in a mouth portion of a respective fixation bore, which mouth portion intersects the recess, for allowing engagement between the first head portion and the plate member.
  • the drill protection members may comprise a pin exhibiting a waist portion with reduced cross sectional dimensions, which pin is received in a pin channel which is arranged in the cylinder housing and extends perpendicular to the axial direction of the cylinder housing, wherein the pin channel intersects at least one of the fixation bores.
  • At least one fixation device may, when received in a corresponding fixation bore, be arranged to engage said waist portion at the intersection between the pin channel and the fixation bore for form locking of the pin in the pin channel.
  • the at least one fixation device may comprise a first fixation member with a sleeve portion which is received in the fixation bore and which extends to the intersection between the pin channel and said fixation bore, for form locking of the pin in the pin channel.
  • the drill protection members may alternatively or additionally comprise an elongated rod which is received in a rod channel which extends in the axial direction of the cylinder housing.
  • the rod channel may, at one end, open to the recess.
  • the at least one fixation device may comprise a first fixation member with a first head portion and a second fixation member with a second head portion, which first and second fixation members are arranged to be engaged with and disengaged from each other by relative rotation.
  • the cylinder housing may comprise a number of radially extending pin tumbler channels aligned one after the other in the axial direction of the cylinder housing.
  • At least two first drill protection members in the form of a respective elongated rod may be arranged in a respective rod channel which channels are arranged at respective sides of the line of pin tumbler channels.
  • Figs. 1a and 1b illustrates a cylinder lock arrangement comprising two identical reversible lock cylinders.
  • Fig. 1a shows an inner lock cylinder 1 and an outer lock cylinder 2. The figure does not show the intermediate lock case arranged between the cylinders, to which lock case the cylinders are fixed.
  • the two cylinders 1, 2 are identical. They exhibit a respective first axial end 1a, 2a which is intended to be located distal to the lock case and a respective second end 1b, 2b arranged opposite to the first end and intended to be arranged proximal to the lock case.
  • Each lock cylinder 1, 2 comprises a cylinder housing 1c, 2c and a core 1d, 2d, which is rotatably accommodated in the cylinder housing 1c, 2c.
  • a set of fixation devices 3, 4 are provided for fixing of the two cylinders 1, 2, to each other and to the lock case.
  • Each fixation device comprises a first fixation member 3 being stationary and a second fixation member 4 being rotary.
  • the two fixation members of each fixation device have cooperating engagement parts for fixing engagement.
  • the first fixation member 3 consists of a nut bushing with an internal thread
  • the second fixation member 4 consists of a screw with external thread.
  • the first fixation member has an external thread and the second fixation member an internal thread.
  • the engagement between the first fixation member and the second fixation member is achieved by means of a bayonet-engagement or the like.
  • each bore comprises a main portion 5 and a mouth portion 6.
  • the main portion 5 extends from the second cylinder end 1b, 2b to the mouth portion 6 which is arranged adjacent the first cylinder end 1a, 2a.
  • the mouth portion 6 is axially divided into an inner mouth portion 6a, being arranged proximal to the main portion 5 and an outer mouth portion 6b being arranged adjacent the first end 2a och the cylinder housing 2.
  • the outer mouth portion 6b extends a small distance, approx.
  • the main portion 5 has a circular cross section with a first diameter D1.
  • the outer mouth portion 6b has a polygonal cross section with a larger cross sectional area than the inner mouth portion 6a and than the main portion 5.
  • a first axial stop 7 having a generally annular abutment surface is arranged at an inner bottom of the outer mouth potion 6b.
  • the first axial stop 7 is substantially parallel to both cylinder end faces.
  • the first axial stop 7 has a circular inner edge and a polygonal outer edge.
  • the outer mouth portion 6b is thus defined by the first axial stop 7 and by a wall which is arranged perpendicular to the first axial stop 7 and which comprises a number of planar wall segments 8.
  • the inner mouth portion 6a has a circular cross section with a second diameter D 2 and a cross sectional area that is smaller than the cross sectional area of the outer mouth portion 6b but larger than the main portion 5.
  • a second axial stop 9a having a generally annular abutment surface is arranged at an inner bottom of the inner mouth potion 6a.
  • the second axial stop 9a is substantially parallel to both cylinder end faces.
  • the second axial stop 9a has a circular inner edge and a circular outer edge.
  • the inner mouth portion 6a is thus defined by the second axial stop 9a and by a cylindrical wall 9b which is arranged perpendicular to the second axial stop 9a and which extends to the first axial stop 7.
  • Each first fixation member 3 comprises an internally threaded cylindrical sleeve portion 3a and a first head portion 3b.
  • the sleeve portion 3a has an outer diameter which is slightly smaller than the inner mouth portion's 6a inner diameter D 2 , so that the sleeve portion 3a can be inserted in the inner mouth portion 6a and therein threadedly receive an externally threaded end 4a (see Figure 1a ) of the second fixation member 4.
  • First head portion 3b has a cross sectional area which is larger than the sleeve portion's 3a cross-sectional area and the cross sectional area of the inner mouth portion 6a. The first head portion 3b can thus not be inserted into the inner mouth portion 6a.
  • the cross section of the first head portion 3b is further polygonal with a shape corresponding to the outer mouth portion's 6b polygonal cross section, so that the first fixation member 3 is prevented from rotating relative to the cylinder 1, 2, by means of form locking between the first head portion 3b and the wall segments 8 of the outer mouth portion 6b.
  • the rotatable second fixation members 4 each have a cylindrical second head portion 4b.
  • the end surface of the second head portion 4b is provided with a groove (not shown) for engagement by a screwdriver or the like.
  • the second head portion 4b has a diameter that is larger than the diameter D 1 of the bore's main portion 5, but smaller than the diameter D 2 of the inner mouth portion 6a.
  • a first cylinder 1 is placed at the inner convenient side of the lock case and a second cylinder 2 at the high security outside of the lock case.
  • the second fixation members 4 are inserted into the first, inner cylinder 1 from the first side 1b.
  • the second fixation members 4 are further pushed such that their threaded portions 4a are passed through corresponding mounting holes (not shown) arranged in the lock casing (not shown) and into the main portion 5 and the inner mouth portion 6a of the second cylinder 2.
  • the first fixation members 3 are introduced into the second, outer cylinder 2 from the first side 2a so that the first head portions 3b are anti-rotationally engaged with the wall segments 8 of the outer mouth portions 6b.
  • the second fixation members 4 are thereafter screwed into threaded engagement with the first fixation members 3.
  • first axial stops 7 of the second cylinder 2 prevents the first fixation members 3 from being displaced towards the first cylinder 1.
  • the second axial stops 9 of the first cylinder 1 will prevent the second fixation members 4a from being displaced towards the second cylinder 2.
  • an axial contractive force is thus achieved, which forces the first 1 and second 2 cylinder to secure abutment against the intermediate lock case (not shown).
  • the form locking between the wall segments 8 and the first fixation member's 3 first head portions 3b prevents the first fixation members 3 from being unscrewed from the outside of the door.
  • the two identical and therefore reversible cylinders 1, 2 may thus be dismounted only from the inside of the door.
  • the first head portion 3b of the first fixation members 3 are further provided with an outwardly convex end surface, which renders it difficult to remove the first fixation members 3 by drilling from the outside of the door.
  • fixation devices and the bores may be varied in a number of different ways within the scope of the appended claims. It is e.g. possible to arrange the mouth portion as a single mouth portion having a constant cross section over its entire axial length. In such a case, the arrangement comprises a single axial stop which is arranged at the bottom of the mouth portion. The head portions of both the first and the second fixation members then has a cross sectional area which is larger than the bore's main portion but smaller or equal to the cross sectional area of the mouth portion. Thus, the single axial stop then prevents the head portions of both the first and the second fixation members from being axially displaced into the bore's main portion.
  • the first fixation members may be formed with a constant cross section over its entire axial length. In such case the entire first fixation member constitutes a first head portion.
  • first head portion constitutes the entire first fixation member or an axial portion thereof
  • relative rotation between the first fixation member and the cylinder may be achieved by other means than by corresponding polygonal cross sections.
  • the mouth portions and the first head portions may e.g. exhibit corresponding non-circular cross sections other than polygonal, such as oval, elliptic or other rounded non-circular shapes.
  • the first head portion and the mouth portion may even be provided with corresponding circular cross sections.
  • relative rotation between the first fixation member and the cylinder may be provided by means of friction locking between the first head portion and the mouth portion.
  • Such a friction locking may be achieved by means of press fitting, force fitting, tight fitting and the like of the first head portion in the mouth portion.
  • the friction between the first head portion and the mouth portion may be increased by means of knurling or other friction increasing means being provided to the first head portion and/or the walls of the mouth portion.
  • Relative rotation between the first head portion and the cylinder may also be achieved by means of interacting form locking and/or friction locking means arranged at an axial end surface of the first head portion and/or on the axial stop arranged at the bottom of the mouth portion.
  • the second fixation members may comprise more than one component.
  • at least one second fixation member may comprise a rod which at least at its end portions exhibits an external thread and a sleeve or the like which is threaded onto one end of the rod. The sleeve then may form the second head portion.
  • a recess, a protrusion or the like for engaging a tool may be provided, e.g. at an end surface of the sleeve, such that the sleeve and the rod may be jointly screwed by means of a screw driver or the like for bringing the other end of the rod into engagement with a first fixation member.
  • the fixation device may thus comprise an externally threaded rod and two internally threaded sleeves, ring nuts, nuts or the like.
  • the lock cylinder arrangement is provided with four axial bores arranged in each lock cylinder and four fixation devices. It is however possible to vary the number och bores and corresponding fixation devices. At the type of lock cylinder exhibiting an oval cross section it has been proven suitable to provide each cylinder with only two bores and the lock arrangement with two corresponding fixation devices.
  • each lock cylinder Upon mounting two cylinders at a respective side of a lock case it may, at some applications, be advantageous to insert some of the first fixation devices from a first side of the lock case and some of the first fixation devices from a second side of the lock case. A corresponding number second fixation devices are then inserted from the respective opposite side of the lock case.
  • the mouth portions of each lock cylinder will accommodate both first and second head portions.
  • Figs. 2a-c illustrate an exemplifying embodiment of a lock cylinder arrangement provided with drill protection means.
  • an outer cylinder 2 of the type described above is shown.
  • the lock cylinder 2 comprises four different types of drilling protection means:
  • the drill protection plate 14 covers the channels 16 in which the rods 11 are occupied and thus prevents removal of the rods 1.
  • Drill protection plate 14 is further configured and arranged so that it is secured to the lock cylinder by two 3' of the first fixing members 3', 3" described above, which first fixing members 3', 3" constitute fixing means for fixing the lock cylinder 2 to a lock case.
  • the recess 2c in which the drilling protection plate 14 is received is arranged to extend into the two central outer mouth portions 6'b of the bores in which the fixing members 3, 4 are occupied.
  • the plate 14 When the plate 14 is positioned in the recess 2c, its outwardly facing surface is arranged in the same plane as the first axial stop 7' defined by the outer mouth portions 6'b.
  • the first head portions 3'b of the central first fixation members 3' will thus abut the plate 14 and prevent removal of the plate 14.
  • the channels 15 in which the drill protection pins 13 are received extend partially through the inner mouth portion 6"a of the outer two bores for the fixation members 3".
  • Each pin 13 further comprises a narrowed waist portion 13a which, in the inserted state is arranged in level with inner mouth portion 6"a.
  • first fixation members 3', 3" on the one hand, per se form drill protection members and, on the other hand, are used for fixing and securing of all drill protection members 1, 13, 14.
  • Figs. 3a-d illustrate an exemplifying embodiment of a lock cylinder arrangement provided with a cylinder ring and a decorative cylinder cap.
  • Figs. 3a-d show a lock cylinder 2 which is intended to be mounted to the high security outside of a door.
  • the cylinder arrangement further comprises a cylinder ring 21, a cap 22 and a locking ring 23 of a resilient material, such as steel.
  • the cap 22 is provided for decorative purposes and may be formed of a number od different materials and exhibiting different colours and surface roughness depending on the field of application.
  • the locking ring 23, cylinder ring 21 and the cap 22 are mounted on the lock cylinder 2 before the lock cylinder 2 is fixed to the lock case as described above. First, the locking ring 23 is applied to the lock cylinder 2, so that it snaps into a designated slot 24 which is arranged in the envelope surface of the lock cylinder 2 and extends in the circumferential direction.
  • a central bore of the cylinder ring 21 has a front cylindrical portion 21a, an intermediate rearwardly radially flared portion 21b and a rear inwardly projecting stop 21c.
  • the front portion 21a has a constant inner diameter d1 which is slightly larger than the outer diameter of the cap 22 and than the outer diameter of the locking ring 23, when mounted in the slot 24.
  • the diameter of the intermediate portion 21b increases gradually backward from diameter d 1 to a larger inner diameter d 2 , so that this portion is conical.
  • the inwardly projecting stop 21c is cylindrical with a diameter d 3 , that is smaller than d 1 , and than the outer diameter of locking ring 23 when the locking ring is mounted. The cylinder ring 21 can thus be threaded onto the lock cylinder in the forward direction until the inwardly projecting stop 21c comes in contact with the locking ring 23.
  • the cap 22 is slipped onto the lock cylinder 2 in the direction from the front.
  • the cap 22 has on its circumferential surface, at the rear end, a resilient tongue 22a with a radially inwardly projecting snap hook 22b and a radially outwardly projecting locking tab 22c.
  • the lock cylinder 2 has on its circumferential surface an axial groove 201 which, at its rear end opens into a snap recess 202, whose depth is larger than that of the groove 201.
  • the snap hook 22b is spoon shaped such as to increase the rigidity of the snap hook 22b to thereby achieve a secure snap engagement with the snap recess 202.
  • the snap hook may however have any suitable shape as long as it may be brought into snap engagement with a corresponding snap recess.
  • the snap hook 22b runs in the slot 201 until the cap is fully slipped onto the cylinder, whereby snap hook 22b snaps into the snap recess 202.
  • the cylinder ring 21 is slipped onto the cylinder 2 from the rear end, in the forward direction.
  • the front cylindrical portion 21 then passes over the locking tab 22c.
  • the cylinder ring 21 may now be positioned at any desired axial position along the cylinder 2, as long as the locking tab 22c is arranged along and radially inside the cylindrical portion 21a or the intermediate conical portion 21b of the cylinder ring 21.
  • the intermediate portion of the cylinder ring may, instead of being conical, comprise a circumferential recess which defines the second inner diameter.
  • a recess may be formed such that the transition between the first inner diameter to the second inner diameter forms a step.
  • the recess may also be curved such that the transition between the first inner diameter and the second inner diameter is continuous.
  • Figs. 1a and 4a-4f illustrates a lock cylinder arrangement comprising a screw protection means for preventing access to the mounting screws by which the lock cylinder is fixed to a lock case.
  • the screw protection means is applied to a lock cylinder 1, which is intended to be mounted to the inner convenient side of a door.
  • the lock cylinder 1 comprises a cylinder housing 1c which has a first axial end 1a which is arranged to be positioned distal to the lock case (not shown) and a second axial end 1b which is arranged opposite to the first axial end 1a and intended to be positioned proximal to the lock case.
  • a cylinder core 1d is rotatably accommodated in the cylinder housing 1c.
  • the lock cylinder 1 exhibits four fixation bores 5, 6 which extends axially through the cylinder housing 1c.
  • Each fixation bore comprise a main portion 5 and a widened mouth portion 6 arranged at the first axial end 1a.
  • Each mouth portion 6 is axially divided into an inner mouth portion 6a and an outer mouth portion 6b.
  • the inner mouth portion 6a defines an axial stop.
  • a fixation member 4 is inserted in each fixation bore 5, 6.
  • Each fixation member 4 comprises a head portion 4b which is able to be seated in the mouth portion 6 and to be axially supported by the axial stop.
  • Each fixation member 4 also comprise a threaded end portion 4a by means of which the lock cylinder 1 may be fixed to a lock casing and/or a corresponding outer lock cylinder as described above.
  • the first axial end 1a of the cylinder housing 1c is provided with a recess 1e.
  • the recess 1e is identical with the recess 2e described above with references to fig. 2a and when the cylinder 1 is used as an outer cylinder, the recess 1e may accommodate a drill protection plate similar to the plate 14 described above.
  • the recess 1e is arranged to receive a cover device 30.
  • the cover device 30 comprises a base member 31 which may be inserted into the recess 1e.
  • a locking member 32 is attached to the base member 31.
  • the locking member 32 is formed as a disc which is rotatably attached to the base member 31 and received in the recess 1e.
  • the base member exhibits 31 an axially extending dowel 37 which is received in a central through opening 38 in the locking member and which defines a rotational axis for the locking member.
  • a spring biased snap pin 39a is arranged at the base member 31.
  • the locking member 32 exhibits two corresponding snap holes 39b, 39c.
  • the snap pin 39a is arranged to snap engage the snap holes 39b, 39c at a respective rotational position of the locking member, corresponding to a release position and a locking position respectively of the locking member 32.
  • the cover device 30 further comprises two leg members 35 which are attached to the base member 31.
  • Each leg member 35 comprises two axially protruding plugs 36.
  • Each plug 36 comprises a first axial plug portion which is insertable into an inner mouth portion 6a of the cylinder housing 1c and a second plug portion 36b which is insertable in the outer mouth portion 6b.
  • the plugs 36 are received in a respective mouth portion 6 such as to cover a head portion 4b of a fixation member 4 received in each mouth portion 6.
  • the cylinder housing 1c is provided with a stop 33 which is formed as two under cut portions of the recess 1e.
  • the locking member 32 exhibits a peripheral edge 34 which is exhibits two indentations 34a.
  • the indentations 34a are arranged at an angular distance which corresponds to the distance between the two under cut portions 33 of the recess. The locking member 32 may thus be rotated to a release position at which the two indentations 34a are aligned with the under cut portions 33, such that the locking member 32 and the base member 31 may be axially inserted into and removed from the recess 1e.
  • the locking member When the locking member 32 and the base member 31 has been received in the recess 1e, the locking member may be rotated to a locking position, wherein the first indentations 34a are brought out of alignment with the under cut portions 33. At the locking position, a portion of the peripheral edge 34 not forming the first indentations engages the under cut portions 33 such that removal of the locking member 32 and the base member is prevented.
  • the cylinder core 1d is provided with a radial cut out 41 which is arranged in the generally cylindrical outer envelope surface 40 of the core 1d.
  • the peripheral edge 34 of the locking member further exhibits a first 34b and a second 34c concave cam surface.
  • the curvature of both concave cam surfaces 34b, 34c correspond to the radius of the cylindrical outer envelope surface 40 of the core.
  • the first concave cam surface 34b is arranged such that it encloses the envelope surface of the core 1d when the locking member 32 has been rotated to its locking position as shown in fig. 4d .
  • the core 1d is in a first rotational position at which it is required to insert an authorized key into the key channel in order to be able to rotate the core 1d.
  • the fist concave cam surface 34b encloses a portion of the outer envelop envelope surface 40 of the core, such that it is not possible to rotate the locking member 32.
  • the indentations 34a are brought out of alignment with the under cut portions 33, such that it is not possible to remove the locking member 32 or the base member 31 from the recess 1e.
  • the head portions 4b of the fixation members 4 are thus covered by a respective plug 36 inserted in the mouth portion 6 of the cylinder housing. Thereby the head portions 4b are not accessible for dismounting of the lock cylinder 1.
  • the locking member may be linearly movable between a locking position and a release position.
  • the stop arranged in the cylinder housing may be formed by other means than an under cut portion of a recess.
  • the stop may be formed as a stud which extends axially from the first end of the cylinder housing.
  • the stud may at the free end be provided with an enlarge head portion.
  • a linearly displaceable locking member may the be provided with a keyhole shaped through opening with a widened portion which may be brought in register with the enlarged head portion for allowing removal of the locking member and a narrower portion which in register with the head portion prevents removal of the locking member.
  • the cover device may comprise any number of plugs or other covering means, which in register with at least one mouth portion for a fixation member prevents access to at least one fixation member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)
EP13190048.2A 2013-10-24 2013-10-24 Cylinder lock arrangement Active EP2865825B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK13190048.2T DK2865825T3 (da) 2013-10-24 2013-10-24 Cylinderlås-arrangement
EP13190048.2A EP2865825B1 (en) 2013-10-24 2013-10-24 Cylinder lock arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13190048.2A EP2865825B1 (en) 2013-10-24 2013-10-24 Cylinder lock arrangement

Publications (2)

Publication Number Publication Date
EP2865825A1 EP2865825A1 (en) 2015-04-29
EP2865825B1 true EP2865825B1 (en) 2016-11-23

Family

ID=49474286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13190048.2A Active EP2865825B1 (en) 2013-10-24 2013-10-24 Cylinder lock arrangement

Country Status (2)

Country Link
EP (1) EP2865825B1 (da)
DK (1) DK2865825T3 (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUA20164990A1 (it) * 2016-06-17 2017-12-17 Cipierre S R L Dispositivo di protezione per cilindri di serrature con elementi fissi antifresa e antitaglio con bocchetta decorativa antistrappo rinforzata
FI128051B (fi) 2018-06-15 2019-08-30 Abloy Oy Lukko

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT334774B (de) * 1975-06-11 1976-02-10 Grundmann Rohrbacher Schlosser Schutzeinrichtung fur schlosser
SE426722B (sv) 1980-11-14 1983-02-07 Gkn Stenman Ab Cylinderbehor
DE29513354U1 (de) * 1995-08-19 1995-11-23 Neuform-Türenwerk Hans Glock, 71729 Erdmannhausen Tür oder Fenster mit einem Verriegelungssystem in Verbindung mit einer Bohrschutzplatte
US6079240A (en) 1998-07-24 2000-06-27 Arrow Lock Manufacturing Company Modular removable core cylinder assembly
US6860129B2 (en) 2001-01-29 2005-03-01 Sargent Manufacturing Company Security classroom function lock mechanism
US7389660B2 (en) 2006-08-04 2008-06-24 Newfrey Llc Deadbolt clip/retainer for interior double cylinder sets

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DK2865825T3 (da) 2017-02-27
EP2865825A1 (en) 2015-04-29

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