ES2098148T5 - WRENCH WITH DOUBLE RAMP OF EXTREMITY FOR SAFETY CYLINDER, CORRESPONDING CYLINDER AND ASSEMBLY CONSTITUTED BY SUCH KEY AND SUCH CYLINDER. - Google Patents

Abstract

Key (10) for a security cylinder comprising a handling element linked to an elongate key body having a rectilinear longitudinal axis, said key body being intended to be inserted into a key housing of said cylinder and being entirely comprised between, on the one hand, two parallel lateral planes and, on the other hand, two longitudinal edges situated between the two lateral planes, one of said edges forming the back (14) of the key body and the other edge being an active edge (15) intended to cooperate with the keying members of the securing cylinder, the back (14) and the active edge (15) being interconnected by a profile section comprising at the vicinity of the back (14) a longitudinal groove (11), with the free extremity area of the key body which is opposite to the handling element being at least partially oblique with respect to the longitudinal axis of the key body, the free extremity region of the key body comprising a first ramp (21) and a second ramp (22) which is offset with respect to the first ramp (21) in the insertion direction of the key (10) in the key housing of the cylinder, both ramps (21, 22) forming acute angles with the longitudinal axis of the key body.

Description

Key with double end ramp for cylinder safety, corresponding cylinder and set consisting of said key and said cylinder.

The present invention relates to a cylinder of safety intended to be maneuvered by a key, for example to the actuation of the mobile organs of a lock. It means also the invention to the key corresponding to this cylinder and to the set consisting of the cylinder and its associated key.

It is known that permanently it is intended to improve The safety of the safety cylinders of the locks, is that is, make your maneuver more difficult by effraction. Classically, a safety cylinder in a lock is constituted by a stator, inside which you can rotate a rotor maneuvered by a key; the key fits into a practiced key housing longitudinally in the rotor; to prevent rotor rotation with respect to the stator in the absence of the correct key, a plurality of blocking organs. According to one embodiment current, a blocking organ is constituted by a plug of rotor and a stator pin located inside the same tubular cavity, the stator pin being driven by a spring towards the axis of the bull; when the key is in position within its housing, the active edge of the key, which presents a set, puts each rotor pin in the position of such that the interface (rotor pin / stator pin) is exactly at the level of the rotor / stator interface) and, in these conditions, the rotor can rotate relative to the stator. May check that, in such a device, it is necessary that the plugs of rotor are protruding inside the key housing to cooperate with the active edge of it.

Now, this provision allows Effraction specialists spin the rotor by means of a simple utensil, usually called "hook". Through this tool, a rotation torque is exerted on the rotor that makes that the rotor is blocked by that of the pins that it has minor play inside your accommodation; at this moment, pulling from the hook along the entire length of the rotor, they sink successively all the pins and, in particular, the one that secured the lock (rotor / stator): at this time, the rotor rotates at a slight angle which makes it locked by another pin, leaving the pair of rotation maintained by means of the hook. How it looks, then, through of this technique, a specialist can, after n displacements length of the hook, rotate the rotor of a cylinder that understand n blocking organs.

It has already been proposed to strengthen the security of this type of cylinder adding to the classic pin device, which We have just described some attached devices, such as some side pins that will rest on the flanks sides of the key body in some prints provided for such effect. It has also been proposed to place a body in the key mobile capable of pushing a rotor pin at the moment in the that the key is in the proper position within its accommodation. These devices make, of course, the most difficult effraction, but they are relatively expensive considering the complexity of the corresponding cylinder and the keys adequate.

The present invention aims to describe a safety cylinder and the corresponding key capable, despite its simplicity of construction, to make very difficult, even impossible all effraction by means of a hook. According to the invention, proposes a safety cylinder in which the locking device elastically impeded through the entire key housing until be supported against a longitudinal rib provided in said accommodation; the blocking organ penetrates, through a relief, into the rib, and a residual space between said rib and wall of the key housing located opposite by front. The key presents, at the level of the rib of the cylinder, a corresponding profile slot and can therefore adjust within the key housing. The end of the key is carved in bevel, so that the bottom of the groove forms, at the end of the key, a first ramp that, in the residual space, will tighten the blocking organ to obtain the relief release that will come out of the rib in the course of key penetration; done this release, the settling of the active edge of the key is going to cooperate, for a second ramp, with the relief of the organ of lock, which allows further key penetration until the next blocking organ, with which the same is performed functional procedure The presence of this double ramp in the end of the key thus allows the maneuver of the locking device while the relief that it presents is not directly Accessible to the action of a hook. If the key had no more than a single end ramp practiced on its active edge would not be possible the insertion of the key since this ramp would go to bump against the rib, unable to act on the relief of the organ of blocking. Operation is only possible thanks to the presence of two ramps: the first, located within the space residual, will attack the blocking organ itself, to ensure the relief release, after which the second acts on the relief released.

The realization of such a device does not present particular complexity, which allows to obtain a cylinder of Security of a limited cost price. Instead, the effraction of such a cylinder is extremely difficult, since the hook cannot act on the relief of the blocking organ, which remains concealed. It would therefore be necessary to act with a hook directly on the blocking organ, in the residual space, but, in this case, the hook bumps on another rotor rib, which remains under the bottom wall of the key slot; the action of this hook thus allows only to release the relief of the rib in the one that was hidden and, in this case, it would be necessary act with a second hook to push the relief, as there would be made the active edge of the key. The manipulation of two hooks in the interior of a space as restricted as the accommodation of the key is practically impossible and, in addition, the key can present, between the mentioned slot and the active edge, other grooves and ribs, so that the second hook could very well not even being able to push the relief of the blocking organ to the position of the rotor release relative to the stator As you see, then, this device, despite its Simplicity, gives the cylinder a high degree of safety.

It has already been proposed, in the document FR-A-2 565 281, a key for safety cylinder comprising a maneuvering element linked to an elongated key body having a longitudinal axis rectilinear, through which the middle longitudinal plane P1 of said key body, said key body being intended to be inserted in a key housing of said cylinder and remaining fully comprised between, on the one hand, two lateral planes P3, P4, parallel to the longitudinal plane P1, and, on the other hand, two longitudinal edges arranged between the two lateral planes cited, one of these edges constituting the back of the body of key and the other constituting an active edge intended to cooperate with locking means of said safety cylinder, being the back and the active edge linked together by a profile that it comprises, near the back, a longitudinal groove, whose bottom is a wall area that has, parallel to the axis longitudinal of the key body, an average longitudinal plane P2, the active edge line being equidistant from the two edges that laterally delimit said active edge, in a plane P3 deviated transversely with respect to the median longitudinal plane P2, the free end area of the key body remaining opposite to the maneuvering element, at least partially oblique with relation to the longitudinal axis of the key body. This arrangement it does not allow to reduce the risks of effraction alone, since Locking organs are directly accessible to the end ramp of the active edge of the key and therefore directly accessible to the action of a hook located inside the key housing. Regarding the current state of the art, we will say that the key according to the invention is characterized by the fact that the end zone free of the body of the same presents a first ramp, defined in the end of the wall area of the profile that delimits the groove, and a second ramp, defined at the end of the active edge, remaining the second retraction ramp with respect to the first, in the sense of the key penetration into the corresponding housing of the cylinder, forming both ramps acute angles with the geometric axis longitudinal of the key body, cutting the second ramp in its thickness the bottom wall of the groove, the wall being called lower than the one that is attached to the active edge of the body of key.

In a preferred embodiment of the key according to the invention, the free end zone of the key body it is configured in tip, thus defining a vertex in a end of the first ramp; you can anticipate that the vertex that shape the end of the key body is arranged at the level of the middle part of the bottom of the groove. Advantageously, the plane longitudinal longitudinal P1 of the key body and the longitudinal plane P5 medium of the active edge is confused significantly. It preferred that the free end of the active edge cuts the first ramp following an edge, whose midpoint will be at a distance from the middle longitudinal line of the lower back of the key between said line and the face of the wall called "bottom" of the slot, which is furthest from the back of the key, being said wall called "bottom" which joins the active edge of the key body. It is also preferred that the angle formed with the axis of the key body on the first ramp be greater than formed with said axis by the second ramp, which allows to ensure the release of the relief of the blocking organ by a minor key travel inside your housing and therefore shorten the total length of the key.

The present invention also has as its object a safety cylinder intended to cooperate with a key such as defined above, said cylinder comprising a rotor cylindrical capable of rotating inside a stator, having practiced a key housing longitudinally in the rotor, being arranged some blocking organs inside the set (rotor / stator) and being elastically impelled in the position of no key lock inside the key housing, no the unlocking occurs rather than if the appropriate key within said key housing, being able to move each locking organ in translation along an axis rectilinear, protruding a longitudinal rib laterally inside the key housing, a space having been arranged residual between said rib and the face facing the mentioned key housing, characterized by the fact that in the absence of a key, each lock body pushed elastically it goes through the key housing until it runs into the said rib, presenting the blocking organ a relief that, by bumping the blocking organ against the rib, it enters a cavity provided for this purpose in said rib, allowing the residual space act on the blocking organ to release the relief of its cavity.

In a preferred embodiment, the organ locking consists of a rotor pin and a pin stator, arranged within the same cylindrical cavity, the stator pin being driven by a spring, and supported the rotor pin, by one of its bases, on the pin stator and carrying, on its other base, the relief intended for adjust on the rib; you can expect the relief to be a hemispherical shoulder arranged along the axis of the plug rotor that supports it and that the rotor and stator pins are cylindrical, the geometric axis of the cylindrical cavity being perpendicular to the rotor shaft. Advantageously, the accommodation of key has a medium longitudinal plane that passes through the axis of the rotor, being the face of the rib on which it can rest a rotor pin perpendicular to said middle longitudinal plane of the key housing.

The present invention finally has object a set consisting of a lock cylinder such as is defined above and a key as it is also defined, characterized by the fact that the first ramp of the key acts on the locking element, within the residual space provided for this purpose, the obliqueness of said ramp being such that the relief of the blocking organ is released from its cavity when the Second ramp comes into contact with the aforementioned relief.

In a preferred embodiment relative to an assembly comprising a lock cylinder whose organ of lock consists of a rotor pin and a pin stator, it is expected that in the course of the key penetration into its housing, support the relief on the active edge of the key, the drawing of said active edge being such that, in the position of maximum key penetration in its housing, the interface (rotor pin / stator pin) is level with the interface (rotor / stator).

To better understand the purpose of the invention, we will now describe, by way of example purely illustrative and not limiting, an embodiment represented in the attached drawing.

In this drawing:

- Figure 1 represents, in elevation, and partially with dashed lines that represent certain hidden parts, a lock cylinder according to the invention;

- Figure 2 represents a section according to II-II of Figure 1;

- Figure 3 represents, in perspective, the end of the key body of the key associated with the cylinder of lock of figure 1;

- Figure 4 represents a section according to IV-IV of Figure 3;

- Figure 5 represents a section according to V-V of Figure 1;

- Figure 6A represents, in the same plane of cut that figure 5, the position of various elements at start the introduction of the key, when the first ramp of the key comes into contact with the first rotor pin, having indicated this cut plane by the VIA-VIA line of Figure 6B;

- Figure 6B schematically represents the relative position of the key and rotor pin for the Figure 6A, the key being represented in section according to VIB plane of the figure VIA and being seen according to arrow F;

- Figure 6C represents a view according to the arrow F1 of Figure 6B;

- Figure 7A represents a view analogous to the of figure 6A, when the key has been slightly inserted in its housing so that the second ramp comes into contact with the hemispherical projection of the rotor pin;

- Figure 7B represents a view analogous to the of Figure 6B for the corresponding key entry position to figure 7A;

- Figure 7C represents a view analogous to the of Figure 6C in the position of the elements corresponding to the figure 7B;

- Figure 8A represents a cross section of the lock cylinder of figure 1 in the plane V-V for a key insertion position which has located the interface (rotor pin / stator pin) to interface level (rotor / stator);

- Figure 8B schematically represents the relative position of the key and rotor pin for the representation of figure 8A, the plane having been designated cut of figure 8A by VIIIA-VIIIA in figure 8B;

- Figure 9 represents, in perspective, a partial view of the cut rotor following a plane parallel to the plane middle length of the key housing, being represented the rotor and stator pins at the height of their accommodation.

With reference to the drawing, we will say that it can be seen which is designated by 1 the rotor of the lock cylinder according to the invention and by 2 the stator in which said rotor rotates. The Stator 2 comprises, in its lower part, an extension 3, where the stator pins 4 and their housings are partially housed associated springs 5. In the continuation of this description, we will assume that extension 3 constitutes the lower part of the cylinder. Each cylinder locking device according to the invention it is constituted by the assembly of a rotor pin 6 and a stator pin 4, arranged inside the same cavity cylindrical 16. The rotor comprises a key housing 7, arranged longitudinally in an axial plane of the rotor. In the inside of this key housing protrudes a rib longitudinal 8; a residual space 9 is provided between the rib 8 and the flat face 7a of the key housing, which remains front to front.

When the appropriate key is inserted into the key housing 7 and is inserted fully into said housing, the interface (pin 6 / pin 4) is at the interface level (rotor 1 / stator 2) and this in regard to each of the organs Lock cylinder lock according to the invention. East cylinder comprises a plurality of parallel locking members, whose geometric axes are arranged according to the axial plane of Q symmetry of the cylinder.

Below the rib 8, in the direction of the extension 3, the key housing 7 comprises a profile corresponding to that of the associated key designated by 10 as a whole; this profile comprises, on the face of the key housing extending the flat part 7 a , two ribs 7 b , 7 c and, on the opposite face, two ribs 8 b , 8 c , misaligned in height with respect to the preceding ones, of so that the straight section of the key housing has, below the rib 8, a sinuous shape.

It is well understood that the key 10 has a general profile complementary to that corresponding to the key housing 7. As a counterpart to the rib 8, the key 10 has a complementary profile groove 11; as counterparts of the ribs 7 b and 7 c , there are grooves 12 b and 12 c ; as counterparts of the ribs 8 b and 8 c , there are grooves 13 b and 13 c . The key 10 is comprised between two lateral planes P3 and P4 and 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), putting the back of the key at the level of said interface when the key is placed in position inside its housing; the edge opposite the back of the key has been designated with 15 and constitutes the active edge of the key, that is, the one that presents the indentations intended to cooperate with the locking members to ensure their convenient placement in position in order to release the rotor relative to the stator. The bottom of the groove 11 is constituted by a flat wall whose middle longitudinal plane has been designated by P2. The active edge 15 of the key is delimited laterally between two edges and the equidistant midline of these two edges is located in a plane P5. The plane P5 is transversely deviated from the plane P2. The key body assembly comprises an average longitudinal plane P1, which is substantially confused with P5. The groove 11 is thus delimited by a bottom 11 whose plane median longitudinal plane P2, by an upper edge 11b, which defines the back key 14, and a lower edge 11 c, which extends transversely to join to the sinuous profile of the key, which, downwards, reaches the active edge 15.

When the key is fully inserted into its key housing 7, the bottom wall 11 c of the slot 11 rests on the rib 7 b , which thus limits the residual space 9 downwards.

Pins 4 and 6 move within the cylindrical cavities 16, which lead to the height of the rib 8. Following the geometric axis of the cylindrical cavities 16, has drilled 17, smaller in diameter than cylindrical cavities, perforation that crosses from side to side the rib 8. Spring 5 presses pin 6 against the face located in front of the rib 8, said face being perpendicular to the middle longitudinal plane of the key housing. On face of the rotor pin 6, which rests against the rib 8, a hemispherical shoulder 18, of the same diameter as the perforation 17. The hemispherical shoulder 18 has the same axis geometric than the rotor pin 6 and thus constitutes a relief, which can penetrate the cavity formed by perforation 17.

The free end of the key body is pointed. The vertex 19 of the key is at the level of the central area of the bottom 11a of the slot 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 of them, arranged at the height of the bottom 11 a of the slot 11, has been designated 21; the other, which constitutes 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 geometric axis of the key 10, and the second ramp 22 It has a lower inclination. The ramp 22 cuts the plane of the ramp 21 through an area located in the thickness of the wall 11 c , following an edge 23.

We will explain in detail now the operation of the device just described.

When key 10 is presented at the entrance of the key housing, the rotor is in position represented in figure 2, that is, that all the plugs of rotor 6 is supported against the underside of the rib 8. At the beginning of the introduction of the key, the ramp 21 remains, in the residual space 9, in support against the edge of the upper base of the first rotor pin 6; Under this support, the plug rotor 6 descends into its cylindrical cavity, compressing the spring 5. The beginning of this phase is represented in the Figures 6A, 6B, 6C. When the key introduction is continued, the shoulder 18 that was introduced in the perforation 17 is released of it and the edge 23 is then precisely on the vertex of the shoulder 18. Then this shoulder 18 is in contact with ramp 22 and a subsequent introduction of the key causes the lowering of rotor pin 6 due to shoulder support 18 on the inclined ramp 22 and then on the active edge 15 of the key, continuation of the ramp 22. It can be seen that this mode, even if, in rest position, the shoulder 18 is inside the thickness of the rib 8, it is possible with this key to attack the shoulder 18 by the active edge of the key due to a previous action of the ramp 21 in the residual space 9. The descent of the plug rotor under the action of ramp 21 must be sufficient to ensure the escape of shoulder 18 out of hole 17. When the rotor pin 6 of the first locking member reached by the key has been placed, by its shoulder 18, in contact with the edge active 15, the key can be inserted until ramp 21 enters in contact with the upper base of the second rotor pin blocking organ and, thus, the shoulder 18 of this second locking body will lean in turn against the active edge 15. The progressive introduction of the key thus puts all the highlights 18 in support on the active edge of the key and take when enter the key fully into its housing, all highlights 18 they are located in the notches of the active edge that correspond, so that the interfaces (pin 6 / pin 4) are find all at the interface level (rotor 1 / stator 2): the rotor is free to rotate with respect to the stator.

As indicated above, it is practically impossible to effract with a hook; a first hook can be placed in position in the residual space 9 and rest on the rotor pin 6 to the upper level of the rib 7 b ; after which it will be necessary to position another hook to press on the shoulder 18, but, in any case, this other hook may not descend below the rib 7 c ; and, of course, this operation should be restarted for all other blocking organs. As can be seen, it becomes practically impossible to effraction.

Claims (12)

1. Key (10) for safety lock cylinder, comprising a maneuvering element linked to an elongated key body having a rectilinear longitudinal geometric axis, through which the middle longitudinal plane P1 of said key body passes , said key body being intended to be introduced into a key housing (7) of said cylinder and being fully comprised between, on the one hand, two lateral planes P3, P4, parallel to the median longitudinal plane P1, and, on the other hand , two longitudinal edges arranged between the two aforementioned lateral planes, one of these edges constituting the back (14) of the key body and the other constituting an active edge (15) intended to cooperate with locking elements (4, 6) of the said safety cylinder, the back (14) and the active edge (15) being joined together by a profile comprising, in proximity to the back (14), a longitudinal groove (11) whose bottom (11 a ) is an area wall that pre sits, parallel to the longitudinal geometric axis of the key body, a median longitudinal plane P2, the line of the active edge (15) being, which is equidistant from the two edges that laterally define said active edge, in a plane P5 transversely offset from the middle longitudinal plane P2, the free end zone of the key body being opposite the maneuvering element, at least partially oblique in relation to the longitudinal axis of the key body, characterized by the fact that the free end zone of the body The key comprises a first ramp (21) defined at the end of the profile wall area, which delimits said groove (11), and a second ramp (22) defined at the end of the active edge (15), the second being ramp (22) in retraction relative to the first ramp (21), in the direction of the introduction of the key (10) into the key housing (7) of the cylinder, the two ramps (21, 22) forming angles treble with e l Longitudinal geometric axis of the key body, cutting the second ramp (22) in its thickness the lower wall (11c) of the groove (11), the bottom wall (11c) being the one that is joined with the active edge (15 ) of the key body. 2. A key according to claim 1, characterized in that the free end area of the key body is tipped, thus defining a vertex (19) at one end of the first ramp (21). 3. A key according to claim 2, characterized in that the vertex (19) forming the end of the key body is arranged at the level of the middle part of the bottom (11 a ) of the slot (11). 4. Key according to one of claims 1 to 3, characterized in that the median longitudinal plane P1 of the key body and the longitudinal plane P5 of the active edge (15) are substantially confused. 5. Key according to one of claims 1 to 4, characterized in that the free end of the active edge (15) cuts the first ramp (21) following an edge (23), whose midpoint is at a distance from the middle longitudinal line of the back (14) of the lower key than the one between said line and the face of the lower wall (11 c ) of the slot (11) which is furthest from the back (14) of the key, said wall being called "bottom" which joins the active edge (15) of the key body. 6. Key according to one of claims 1 to 5, characterized in that the angle formed with the geometric axis of the key body by the first ramp (21) is greater than that formed with said axis by the second ramp (22) . 7. Safety lock cylinder intended to cooperate with a key (10) according to one of claims 1 to 6, said cylinder comprising a cylindrical rotor (1) capable of rotating in a stator (2), a key housing having been made (7) longitudinally in the rotor (1), with blocking elements (4, 6) being arranged in the assembly (rotor 1 / stator 2) and being elastically impelled to the locked position in the absence of a key in the key housing (7), the unlocking does not occur except if the appropriate key (10) is placed in position within said key housing (7), each locking member (4, 6) being able to move in translation along a rectilinear geometric axis, a longitudinal rib (8) protruding laterally inside the key housing (7), a residual space (9) being arranged between said rib (8) and the opposite face (7 a ) of said key housing (7), characterized by the fact of that in the absence of a key, each lock member (4, 6) pushed elastically through the key housing (7) until it hits against said rib (8), the lock member (4, 6) having a relief (18) that , by bumping the blocking member against the rib (8), it enters a cavity (17) provided for that purpose in said rib (8), allowing the residual space (9) to act on the blocking member to release the relief (18 ) of its cavity (17). 8. Lock cylinder according to claim 7, characterized in that the locking member is constituted by a rotor pin (6) and a stator pin (4) disposed within the same cylindrical cavity (16), being the stator pin (4) is impelled by a spring (5), the rotor pin (6) resting, by one of its bases, on the stator pin (4) and presenting, on its other base, the relief (18 ), which is intended to be adjusted in the rib (8). 9. Lock cylinder according to claim 8, characterized in that the relief is a hemispherical shoulder (18) arranged along the axis of the rotor pin (6), which supports it, and because the rotor pins (6 ) and stator (4) are cylindrical, the geometric axis of the cylindrical cavity (16) being perpendicular to the axis of the rotor (1). 10. Lock cylinder according to one of claims 7 to 9, characterized in that the key housing has a median longitudinal plane that passes through the rotor shaft (1), the rib face (8) being on which can be supported a rotor pin (6) perpendicular to said middle longitudinal plane of the key housing (7). 11. Assembly consisting of a lock cylinder according to one of claims 7 to 10, and a key according to one of claims 1 to 6, characterized in that the first ramp (21) of the key (10) acts on the blocking member within the residual space (9) provided for this purpose, the obliqueness of said ramp (21) being such that the relief (18) of the blocking member is released from its cavity (17) when the second ramp (22 ) gets in touch with this relief (18). 12. Assembly according to claim 11, which includes a lock cylinder according to claim (8), characterized in that in the course of the insertion of the key (10) into its housing (7), the relief (18 ) rests on the active edge (15) of the key (10), the drawing of said active edge (15) being such that, in the position of maximum penetration of the key (10) in its housing (7), the interface (rotor pin 6 / stator pin 4) is at the interface level (rotor 1 / stator 2).