Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B19/00—Keys; Accessories therefor
  • E05B19/0017—Key profiles
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B19/00—Keys; Accessories therefor
  • E05B19/0017—Key profiles
  • E05B19/0041—Key profiles characterized by the cross-section of the key blade in a plane perpendicular to the longitudinal axis of the key
  • E05B19/0052—Rectangular flat keys
• • 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
  • E05B27/0003—Details
  • E05B2027/0025—Details having means preventing rotation of the tumbler
• • 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
  • E05B27/0003—Details
  • E05B27/0017—Tumblers or pins

Definitions

• the present invention relates to a safety barrel intended to be operated by a key, for example for driving the movable members of a lock.
• the invention also relates to the key corresponding to this barrel and the assembly consisting of the barrel and the key associated therewith.
• a safety barrel is made up of a stator, inside which can rotate a rotor operated by a key; the key is engaged in a key housing made longitudinally in the rotor; to block the rotation of the rotor relative to the stator in the absence of the correct key, a plurality of keying members is used.
• a locking member consists of a rotor pin and a stator pin placed inside the same bore, the stator pin being pushed by a spring in the direction of the 'rotor axis; when the key is in position in its housing, the active edge of the key, which has teeth, positions each rotor pin so that the interface (rotor pin / stator pin) is exactly at the level of the interface (rotor / stator) and, under these conditions, the rotor can rotate relative to the stator. It can be seen that, in such a device, it is necessary for the rotor pins to protrude into the key housing in order to cooperate with the active edge of the key.
• this arrangement allows break-in specialists to rotate the rotor by means of a simple tool, generally called a "hook".
• a torque is exerted on the rotor which causes the rotor to be locked by that of the pins which has the least play in its housing; at this time, by pulling the hook over the entire length of the rotor, one successively pushes in all the pins and, in particular, the one which ensured the locking (rotor / stator): at this moment, the rotor turns at a slight angle which causes it to be locked by another pin, as long as the torque is maintained using the hook.
• a specialist can, after n longitudinal displacements of the hook, rotate the rotor of a barrel comprising n locking members.
• the object of the present invention is to describe a security barrel and the corresponding key capable, despite its simplicity of construction, of making any break-in by means of a hook very difficult, if not impossible.
• a safety barrel in which the elastically pushed keying member passes through the entire key housing until it is in abutment against a longitudinal rib provided in said housing; the keying member penetrates, through a relief, in the rib, and a residual space is formed between said rib and the wall of the key housing which faces it.
• the key comprises, at the level of the barrel rib, a groove of corresponding profile and can therefore be engaged in the key housing.
• the end of the key is cut at a bevel, so that the bottom of the groove forms, at the end of the key, a first ramp which, in the residual space, presses on the keying member to obtain the relief of the relief outside the rib during the insertion of the key; when this release is achieved, the teeth of the active edge of the key cooperate, by a second ramp, with the relief of the keying member, which allows the subsequent insertion of the key to the member following keying, with which the same operating mode is achieved.
• the presence of this double ramp at the end of the key therefore allows the maneuvering of the keying member while the relief carried by it is not directly accessible by the action of a hook.
• the key may comprise, between the aforementioned groove and the active edge, other grooves and ribs, of so that the second hook could very well not even be capable of pushing the relief of the keying member to the position, which ensures the release of the rotor relative to the stator.
• this device despite its simplicity, gives the barrel a high degree of security.
• FR-A-2 565 281 has already proposed a key for a safety barrel comprising an operating element linked to an elongated key body having a rectilinear longitudinal axis, through which the median longitudinal plane PI of said body passes.
• key said key body being intended to be inserted into a key housing of said barrel and being entirely comprised between, on the one hand, two lateral planes P3, P4, parallel to the longitudinal plane PI, and, on the other hand, two longitudinal edges disposed between the two aforementioned lateral planes, one of these edges constituting the back of the key body and the other constituting an active edge intended to cooperate with means for keying said safety barrel, the back and the active edge being interconnected by a profile comprising, in the vicinity of the back, a longitudinal groove, the bottom of which is a wall zone having, parallel to the longitudinal axis of the key body, a mean longitudinal plane P2, the line of the active border, which is equidistant from the two edges laterally delimiting said active border, being in a plane
• the key according to the invention is characterized in that the free end zone of the key body comprises a first ramp, defined at the end of the wall zone of the profile which delimits the groove, and a second ramp, defined at the end of the active edge, the second ramp being set back relative to the first ramp, in the direction of driving the key into the key housing of the barrel, the two ramps forming acute angles with the longitudinal axis of the key body.
• the free end zone of the key body is shaped as a point, a vertex thus being defined at one end of the first ramp; provision may be made for the top forming the end of the key body to be arranged at the middle part of the bottom of the groove.
• the median longitudinal plane PI of the key body and the mean longitudinal plane P5 of the active edge are substantially combined. It is preferred that the free end of the active border intersects the first ramp along an edge, the midpoint of which is at a distance from the longitudinal center line of the back of the key less than that existing between said line and the face of the so-called wall.
• the angle formed with the axis of the key body by the first ramp is greater than that formed with said axis by the second ramp, which makes it possible to ensure the relief of the relief of the keying member by a shorter stroke of the key in its housing and, therefore, to shorten the total length of the key.
• the present invention also relates to a safety barrel intended to cooperate with a key as defined above, said barrel comprising a cylindrical rotor capable of rotating in a stator, a key housing being formed longitudinally in the rotor, organs being keyed in the assembly (rotor / stator) and being elastically pushed into the keying position in the absence of a key in the key housing, unclogging only occurs if the appropriate key is put in place in said housing key, each keying member being able to move in translation along a rectilinear axis, a longitudinal rib projecting laterally in the key housing, a residual space being formed between said rib and the opposite face of said key housing, characterized by the fact that in the absence of a key, each elastically pushed keying member passes through the key housing until it comes to an end e against said rib, the keying member comprising a relief which, when the keying member abuts against the rib, enters a recess provided for this purpose in said rib, the residual space
• the keying member consists of a rotor pin and a stator pin, arranged in the same bore, the stator pin being pushed by a spring, the rotor pin s' pressing, by one of its bases, on the stator pin and carrying, on its other base, the relief which is intended to engage in the rib; it can be provided that the relief is a hemispherical stud arranged along the axis of the rotor pin which carries it and that the rotor and stator pins are cylindrical, the axis of the bore being perpendicular to the axis of the rotor .
• the key housing has a median longitudinal plane, which passes through the axis of the rotor, the face of the rib on which a rotor pin can bear, being perpendicular to said median longitudinal plane of the key housing.
• the present invention finally relates to an assembly consisting of a barrel as defined above and a key as defined above, characterized in that the first ramp of the key acts on the locking member, in the residual space provided for this purpose, the obliquity of said ramp being such that the relief of the keying member is released from its recess when the second ramp comes into contact with said relief.
• each locking member of which consists of a rotor pin and a stator pin
• the relief is supported on the active border of the key, the design of said active border being such that, in the position of maximum insertion of the key into its housing, the interface (rotor pin / stator pin) is brought to the interface (rotor / stator) level.
• FIG. 3 shows, in perspective, the end of the key body of the key associated with the barrel of Figure 1;
• FIG. 6 A represents, in the same section plane as FIG. 5, the position of the various elements at the start of the introduction of the key, when the first ramp of the key comes into contact with the first rotor pin, this section plane being identified by the line VIA-VIA in FIG. 6B;
• FIG. 6B shows, schematically, the relative position of the key and the rotor pin for Figure 6A, the key being shown in section along the plane VIB of Figure 6A and being seen in arrow F;
• FIG. 6C represents a view according to the arrow FI in the figure
• Figure 7A shows a view similar to that of Figure 6 A, when the key has been slightly inserted in its housing so that the second ramp comes into contact with the hemispherical stud of the rotor pin;
• Figure 7B shows a view similar to that of Figure 6B for the key entry position corresponding to Figure 7 A;
• Figure 7C shows a view similar to that of Figure 6C in the position of the elements corresponding to Figure 7B;
• FIG. 8A shows a cross section of the barrel of Figure 1 in the plane VV for a driving position of the key which brought the interface (rotor pin / stator pin) at the interface (rotor / stator);
• - Figure 8B shows, schematically, the relative position of the key and the rotor pin for the representation of Figure 8A, the section plane of Figure 8A being designated by V ⁇ lA-VIIIA in Figure 8B;
• FIG. 9 shows, in perspective, a partial view of the rotor cut along a plane parallel to the median longitudinal plane of the key housing, the rotor and stator pins being shown to the right of their housing.
• the barrel rotor according to the invention has been designated by 1 and by 2 the stator in which said rotor pivots.
• the stator 2 has, in its lower part, an extension 3, in which the stator pins 4 and their associated springs are partially housed 5.
• the extension 3 constitutes the lower part of the barrel.
• Each locking member of the barrel according to the invention consists of the assembly of a rotor pin 6 and a stator pin 4, arranged inside the same cylindrical bore 16.
• the rotor comprises a housing key 7, arranged longitudinally in an axial plane of the rotor.
• This barrel comprises a plurality of parallel keying members, the axes of which are arranged along the axial plane of symmetry Q of the barrel.
• the key housing 7 has a profile which corresponds to that of the associated key designated by 10 as a whole; this profile comprises, on the face of the key housing which extends the flat part 7a, two ribs 7b, 7ç_ and, on the opposite face, two ribs 8k, ⁇ _, offset in height relative to the previous ones, so that the cross section of the key housing has, below the rib 8, a sinuous shape.
• the key 10 has, of course, a general profile complementary to that of the key housing 7.
• the key 10 comprises a groove with a complementary profile 11; in return for the ribs 7b and 7c_, there are grooves 12k and 12ç; in return for the ribs 8b and 8c_, there are grooves 13b and 13ç_.
• the key 10 is between two lateral planes P3 and P4 and it is delimited by two transverse edges: the upper edge 14 constitutes the back of the key and is slightly rounded to adapt to the shape of the interface (rotor / stator ), the back of the key coming from said interface when the key is placed in its housing; the border opposite the back of the key has been designated by 15 and constitutes the active border of the key, that is to say that which carries the teeth intended to cooperate with the keying members to ensure their proper positioning in order to release the rotor relative to the stator.
• the bottom of the groove 11 is constituted by a flat wall, the mean longitudinal plane of which has been designated by P2.
• the active border 15 of the key is delimited laterally between two edges and the average line equidistant from these two edges is in a plane P5.
• the plane P5 is offset transversely with respect to the plane P2.
• the entire key body has a median longitudinal plane PI, which is substantially coincident with P5.
• the groove 11 is therefore delimited by a bottom 11a, having the median longitudinal plane the plane P2, by an upper border 11b, which defines the back of the key 14, and by a border lower llc_, which extends transversely to join the sinuous profile of the key, which, downwards, leads to the active border 15.
• the pins 4 and 6 move in cylindrical bores 16, which open at right angles to the rib 8. According to the axis of the bores 16, a drilling 17 has been made, of smaller diameter than that of the bores, this drilling passing through right through the rib 8.
• the spring 5 pushes the pin 6 against the opposite face of the rib 8, said face being perpendicular to the median longitudinal plane of the key housing.
• the hemispherical stud 18 has the same axis as the rotor pin 6 and therefore constitutes a relief, which can penetrate into the recess formed by the hole 17.
• the free end of the key body is shaped like a point.
• the top 19 of the key is located at the central zone of the bottom 11a of the groove 11.
• This pointed end is delimited, in the direction of the back of the key, by a bevel 20 and, in the opposite direction, by two ramps: one, arranged in line with the bottom of the groove 11, has been designated by 21; the other, constituting the end of the active edge 15 of the key, has been designated by 22.
• the first ramp 21 has the same inclination as the bevel 20, relative to the longitudinal axis of the key 10, and the second ramp 22 has a lower inclination.
• the ramp 22 intersects the plane of the ramp 21 in an area located in the thickness of the wall llç, along an edge 23.
• the progressive depression of the key thus puts all the studs 18 in abutment on the active edge of the key and, when the key is fully inserted into its key housing, all the pins 18 are located in the notches of the active border which are intended for them, so that the interfaces (pin 6 / pin 4) are all at the interface (rotor 1 / stator 2): the rotor is free to rotate relative to the stator;
• breaking in with a hook is practically impossible; one can put in place a first hook in the residual space 9 and press the rotor pin 6 to the upper level of the rib 7b; after which it is necessary to set up another hook to come to press on the stud 18 but, in any case, this other hook cannot descend lower than the rib 7c; and, of course, this operation should be repeated for all the other keying members. We see that the break-in is thus made practically impossible.

Landscapes

• Lock And Its Accessories (AREA)
• Preventing Unauthorised Actuation Of Valves (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9447362

Family Applications (1)

Country Status (7)

Cited By (4)

Families Citing this family (1)

Citations (3)

• 1993
  • 1993-05-24 FR FR9306148A patent/FR2705721B1/fr not_active Expired - Lifetime
• 1994
  • 1994-05-19 WO PCT/FR1994/000593 patent/WO1994028273A1/fr active IP Right Grant
  • 1994-05-19 HU HU9502915A patent/HU216958B/hu not_active IP Right Cessation
  • 1994-05-19 DE DE69401213T patent/DE69401213T3/de not_active Expired - Lifetime
  • 1994-05-19 ES ES94917033T patent/ES2098148T5/es not_active Expired - Lifetime
  • 1994-05-19 EP EP94917033A patent/EP0700479B2/fr not_active Expired - Lifetime
  • 1994-05-19 AT AT94917033T patent/ATE146552T1/de not_active IP Right Cessation

Patent Citations (3)

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