FR2910517A1 - Lock i.e. bramah lock, has insert receiving key for operating insert in external barrel, where key has mobile element for driving axial locking bolt toward unlocking position when rod is introduced in axial passage way - Google Patents

Abstract

The lock (10) has an insert receiving a key (66) for operating the insert in an external barrel (12). The barrel has an axial locking bolt moving in translation between a locking position in which the bolt locks the insert in rotation and an unlocking position in which the insert is free in rotation with respect to the bolt. The key has a mobile element i.e. piston (74) for driving the bolt toward the unlocking position when a rod (68) is introduced in an axial passage way (20). The insert is equipped with a transversal strip (56) and a supporting element (65).

Description

The present invention relates to a safety lock

  lock comprising a lock barrel and a barrel.

  In particular, the invention relates to additional safety equipment to enhance the safety of pump locks. Pump lock barrels are adapted to receive an operating key that rotates the barrel in the barrel. For each lock barrel produced corresponds at least one coded key which allows the barrel to be locked and unlocked. The coded key comprises a rod whose end has notches of different lengths which then form axial shoulders defining a combination. The barrel adapted to receive the coded key comprises it, an inner wall defining an axial passageway and is equipped with retaining bars mounted radially around the passageway. The inner wall of the barrel has axial grooves in which are slidably mounted the retaining bars and the latter are held in their respective groove by means of a cylindrical spring adapted to extend in the axial passageway. The retaining bars respectively have two opposite ends in return towards the inside of the barrel so as, on the one hand, to imprison the cylindrical spring between the bars and, on the other hand, to form stops able to bear on the axial shoulders of the key shank. In addition, the retaining bars have outwardly at least one notch located at a determined distance from the end stop. The retaining strips are also adapted to slide inside a ring equipped with centripetal teeth and which is held in a fixed position relative to the barrel. Thus, the position of the notches of each of the retaining strips with respect to their respective abutments coincides with the length of the axial shoulders so as to translate the bars in translation by a certain distance when the key is introduced into the barrel, to carry each of the notches to the right of said crown. In this way, the key can then be rotated and rotate the barrel in the barrel, the retaining bars then escaping the teeth of the crown through the 5 notches. In particular, reference may be made to document FR 2 670 820, which describes such a cylinder lock. This document illustrates ways to introduce a unique key in different types of lock corresponding. However, this type of lock which is already relatively safe, is also likely to be forced and is relatively expensive to produce. Therefore, a problem that arises and that aims to solve the present invention is to provide a lock and also a corresponding key, which makes it safer. In addition, the invention aims to provide a lock that can be produced at an advantageous cost. In order to solve this problem, the present invention proposes, according to a first object, a lock comprising a lock barrel and a barrel, said barrel being adapted to receive a key for manipulating said barrel in said barrel, said key having a rod. whose end 20 has axial shoulders of different lengths to define a combination, said barrel having an axial passageway and retaining bars mounted radially around said passageway, said passageway being adapted to receive said rod, said bars being movably mounted in axial translation between a locking position where said barrel is locked in rotation inside said barrel and an unlocking position where said barrel is free to rotate, said bars being adapted to bear on said shoulders when said key shank is introduced into said step path wise to bring said bars into said unlocked position; according to the invention, said barrel further comprises an axial locking latch, said axial latch being movable in translation between a locking position in which said axial latch is adapted to block said barrel in rotation and an unlocking position in which said barrel is free to rotate with respect to said axial latch; and said key further has a movable member adapted to drive said axial latch to said unlocking position when said rod is introduced into said passageway. Thus, a feature of the invention lies in the implementation of an axial locking latch in excess of the retaining bars that already allow the locking of the barrel, so as to make more difficult the break-in of the lock. Indeed, the qualities of a lock io are measured at the time necessary for its break-in and therefore, by complicating the unlocking mode of the barrel in the barrel of a pump lock already known, it extends by nature this unlocking time . This time is lengthened because, as long as the axial lock lock is active, the force exerted on the barrel to maneuver is taken up 15 by the axial lock and none of the bars is supported on stop means such a crowned. Thus, by hooking them one after the other, we can not determine their unlocking position. In addition, thanks to the mobile element reproduction of the key is made more difficult, so that the risk of duplication of these keys are lower.

According to a particularly advantageous embodiment of the invention, said bars are movable in translation towards two unlocking positions opposite with respect to said locking position, and when the retaining bars are driven towards one of said two positions. release, at least one of said strips also causes said axial lock to said unlocking position. In this way, when the retaining bars are driven towards one of said two unlocking positions, it is possible to dispense with the operation of the movable element, and the cylinder is unlocked by simply sliding one of the retaining bars. 30 and no longer also thanks to the action of the movable element. In this way, it eliminates the means for implementing the movable element at least in one direction of introduction of the key. It will be ensured, for example, that the direction of insertion of the key corresponds to its introduction from the inside, for example with respect to a door closing an opening of a dwelling. It is understood that it is rather necessary to implement the safety elements, and more precisely the movable element, when it is desired to actuate the lock from the outside. In addition, said barrel advantageously has an internal shoulder and an axial orifice which opens into said shoulder and said axial latch is slidably mounted in said axial orifice to come to block the barrel in rotation when the axial latch protrudes from the shoulder. . For this, the cylinder advantageously has an axial locking recess adapted to receive the axial lock. In addition, according to a particular and advantageous feature, said axial orifice is provided with elastic return means for holding said axial lock 15 projecting from said shoulder and also so as to be retracted into said orifice to release said barrel, either by the intermediate of the movable element, or through a bar as will be explained below in more detail. Furthermore, said barrel is preferably equipped with a member 20 pivoting about a transverse axis, which pivoting member is adapted to bear against the protruding axial latch and retract the latter when the pivoting member pivots; said one of said bars being adapted to pivot said pivoting member to drive said axial lock to said unlocking position.

Advantageously, said pivoting member is eccentrically mounted with respect to said passageway and said barrel comprises a bearing element or a support part forming a ramp situated in said barrel and in a position diametrically opposite to said pivoting member. Thus, said movable element which comprises a piston slidably mounted across said rod and which has two opposite ends adapted to respectively protrude from said rod in two diametrically opposite zones, allows the driving of the axial lock. Indeed, when the rod is introduced into the passageway, one of said ends is driven against the support piece and the displacement in translation of the rod in the passageway then causes the drive in translation of the piston whose opposite end comes in turn drive the pivoting member which retracts the axial latch. According to another object, the present invention provides a lock key for operating a barrel in a lock barrel, said key having a rod whose end has axial shoulders of different lengths to define a combination, said barrel having a path axial passage and retaining bars mounted radially around said passageway, said passageway being adapted to receive said rod, said bars being movably mounted in axial translation between a locking position where said cylinder is locked in rotation at the inside said barrel and an unlocking position where said barrel is free to rotate, said barrettes being adapted to bear on said shoulders when said key rod is inserted into said passageway so as to bring said bars in said unlocked position ; according to the invention said barrel further comprises an axial locking latch, said axial latch being movable in translation between a locking position in which said axial latch is adapted to lock said barrel in rotation and an unlocking position in which said barrel is free to rotate relative to said axial lock, said key further has a movable member adapted to cause the drive of said axial lock to said unlocking position when said rod is introduced into said passageway. Other features and advantages of the invention will emerge on reading the following description of particular embodiments of the invention, given by way of non-limiting indication, with reference to the appended drawings in which: Figure 1A is a schematic axial sectional view of a lock according to the invention and at rest; Figure 1B is a detail view of the lock shown in Figure 1A; - Figure 2 is a schematic axial sectional view of the lock shown in Figure 1 receiving a key; Figure 3A is a schematic axial sectional view of the lock illustrated in Figure 2 in an unlocked position; - Figure 3B is a schematic cross-sectional view of the lock illustrated in Figure 3A in the plane IIIB - IIIB; Figure 4 is a schematic view of the lock illustrated in Figure 1 receiving a key in an opposite end; and, Figure 1 illustrates a lock 10 having a barrel, here an outer barrel 12 may be mounted in a fixed position through the flap of an opening. The lock 10 is equipped with a substantially tubular barrel 14, mounted inside the outer barrel 12 and capable of being rotated in this outer barrel 12 by means of a key, as can be seen in FIG. will explain below. The barrel 14 consists of three parts, a central portion 16, a first end portion 18 located outside the outer barrel 12 and a second end portion 19 located inside the outer barrel 12. Preferably, the portion 20 central 16 and the first end portion 18 constitute a single piece, while the second end portion 19 is attached to close the barrel 14. It is then integral in rotation with the central portion 16 with pins axial peripherals that engage in corresponding axial peripheral notches. The barrel 14 has an axial passage 20 which extends an inlet 21 of the outer barrel 12, and an inner wall 22 in which are formed axial grooves 24 which extend longitudinally in the three parts 16, 18, 19, and parallel to each other around the axial passageway 20. The inlet 21 of the outer barrel 12 is generally installed towards the outer part of an opening. The barrel 14 is then equipped with retaining bars 26 respectively slidably mounted in the axial grooves 24 and 2910517 7 radially around the passageway 20. Only two diametrically opposed bars 26 appear here in the sectional view, but for example between six and ten retaining bars can be installed respectively in six to ten axial grooves. These retaining bars 26 extend longitudinally over a length substantially greater than two thirds of the total length of the barrel 14 so as to be integral with the three parts 16, 18, 19 of the barrel 14, regardless of their axial position in the barrel 14. barrel 14. They further have two opposite ends substantially symmetrical to each other and forming a centripetal return 28. Thus, the bars 26 form a cage 30 within which extends an elastic cylindrical body 32 axially compressible. The resilient cylindrical body 32 has two opposed pistons 34, 36 connected together by a helical spring 38. The elastic cylindrical body 32 bears against an inner edge 40 of the webs 26, to hold them in their respective grooves, while the opposed pistons 34, 36 abut against the inner portion of the centripetal returns 28. In addition, between the two parts 16 and 18 of the barrel 14, is coaxially installed a ring 42 mounted integral with the outer barrel 12. The ring 42 has radial slots adapted to coincide with the axial grooves 24 of the barrel 14 and therefore that the retaining bars 26 pass through. These radial slots then define teeth in the inner periphery of the ring 42, which blocks transversely the retaining bars 26 so as to lock the barrel 14 in the outer barrel 12. It will be noted that when the central portion 16 and the first portion end 18 constitute one and the same piece, the ring 42 is formed by two semi-circular crowns reported in a groove which is formed between the two parts. Moreover, the retaining bars 26 have an outer edge 44 in which are respectively formed two notches 46. It will be noted that the two notches 46 of each of the two upper and lower strips 26, appearing in FIG. 1 are located at 2910517 8 equal distance on either side of the ring 42 and that this state corresponds to a rest position of the lock 10. On the other hand, this is not the case for the other bars in general. The following will explain the mode of cooperation of the retaining bars 26 and the crown 42 when the notches 46 are carried at the teeth of the ring 42 to allow the rotation of the barrel 14. The barrel 14 further comprises in its second end portion 19, an axial recess 48 eccentric with respect to the axial passage 20 and the outer barrel 12 has inside, an internal shoulder 50 and an axial orifice 52 which opens into the internal shoulder facing of the axial recess 48. In addition, an axial latch 54 slidably mounted in the axial orifice 52 is biased by elastic means to protrude from the internal shoulder 50 and extend at least partially into the axial recess. In this way, the barrel 14, via its second end portion 19 is locked in rotation by the axial lock 54 against which the inner walls of the axial recess 48 are susceptible. to come into abutment laterally, when the barrel 14 is rotated. Furthermore, the end portion 19 is equipped with a pivoting member 56 consisting of a transverse strip. This transverse strip 56 is pivotally mounted about a longitudinal axis 57 oriented transversely, passing through one of its angles, the longitudinal axis of the strip 56 extending transversely to the inner shoulder 50 of the outer barrel 12 and substantially parallel to this inner shoulder 50. The second end portion 19 and its axial recess 48 in which the axial lock 54 projects to lock in rotation the second end portion 19 of FIG. barrel 14 in the outer barrel 12. In addition, the transverse strip 56 is also shown which is tilted towards the inside of the barrel 14 by means of the axial lock 54 which bears on a front face 60 of the transverse strip 56. Also in this Figure 2910517 9 the longitudinal axis 57 of the crossbar 56 around which it tilts. Opposite its front face 60, the transverse strip 56 has a rear face 62 and a lower face 64 oriented towards the axial passage path 20. As explained above, in this position the axial latch 54 driven by force through elastic means penetrates inside the axial recess 48 by tilting the transverse strip 56 which is free, and therefore blocks in rotation the second end portion 19 of the barrel 14 and thereby the barrel 14 to itself. We can refer to this Figure in the following description when explaining the release itself. Prior to this, FIG. 1A describes a ramp-forming support element 65 located in said barrel, in a position diametrically opposed to the transverse strip 56, opposite its lower face 64 and which extends slightly protruding in the axial passage 20. This support element 65 is either molded in one piece with the second end portion 19, or consists of a reported bearing part. 2, the lock 10 as shown in FIG. 1, except for a key 66 whose rod 68 has already been partially introduced into the axial passage 20 in a direction going from left to right according to the arrow F. The rod 68 has an end 70 in which are formed notches forming shoulders 72 and a movable member forming a piston 74 slidably mounted in the rod through which it passes through.

The piston has two opposite ends, an upper end 76 and a lower end 78, adapted to protrude respectively from said rod 68 in two diametrically opposite zones. The upper end 76 is able to open into a substantially concave zone of the rod 68, while the lower end 78 opens out into an area where an axial bottom groove is formed. Of course, the mobile element 74 is mounted captive in the rod 68.

2910517 The movable member 74 is engaged transversely in the inlet 21 of the outer barrel 12 through the rod 68 which it is secured. The upper end 76 is flush with the concave region of the rod 68, to allow entry into the inlet 21, while the lower end 78 extends into the axial lower groove. The lower wall of the inlet 21 then has at this level, no obstacle that would oppose the introduction of the rod 68. We now find in Figures 3A and 3B the outer barrel 12, the second part of end 19 of the barrel 14, the key rod 68, the support piece forming ramp 65, the opposite, the transverse strip 56 and the movable member 74 which has been driven in translation as will be explained . Indeed, from the position of the key 66 illustrated in FIG. 2, it has been pressed further along the direction F to its unlocking position in which the retaining bars 26 have been driven in translation so as to what their notches 46 come to the right of the crown 42. For this, the outer slices centripetal returns 28 have come to bear on the shoulders 72 as the key has been pressed into the passageway 20 to finally lead the bars retaining 26 in translation in this unlocking position. Moreover, as and when the key 66 is inserted, the lower end 78 of the piston 74 comes to rest on the ramp-forming support piece 65 which extends in the axial lower groove of the rod 68. The latter then caused, during the translation of the rod 68, the upward transverse movement R of the piston 74 towards the transverse strip 56 and the upper end 76 of the piston 74 came to bear against the lower face 64 of the transverse strip 56. Continuing the movement, the piston 74 then caused the pivoting of the transverse strip 56 about its axis 57 in the trigonometric direction and the movement of its front face 60 against the axial lock 54 which was then retracted in its axial orifice 52 by compressing the elastic means. In this way, the axial lock 54 has released the axial recess 48 of the second end portion 19 of the barrel 14 and consequently has also released the barrel 14 in rotation. Thus, in this position nothing stands in the way. more to the rotation of the cylinder 14 by operating the key 66 in rotation.

According to another embodiment of the invention, not shown, there is provided a movable support element recalled by elastic means. Thus, a ball or a counter-piston biased by a spring, exerts a force on the lower end 78 of the piston 74, when the latter comes to the right of the support member so as to cause the pivoting of the ruler In this way, it is possible to dispense with the lower axial groove formed in the rod 68. Reference will now be made to FIG. 4, illustrating the lock 10 in an unlocked and unlocked position identical to that illustrated by FIG. 3A, with the only difference that the key 66 has been introduced opposite the inlet 21 and directly into the first end portion 18 in a direction G opposite to the direction F. The first end portion 18 is a priori installed on the inner side of an opening, because the security measures to take there are less interesting. It has therefore been imagined to overcome the operation of the mobile element 74 to unlock the barrel 14.

Thus, it avoids a double mounting, axial lock, pivoting member, and supporting part forming a ramp which simplifies the lock and makes it less expensive. Therefore, the lock 10 shown in Fig. 4 is in a position similar to the same lock shown in Fig. 3A except for the position of the key 66 which here no longer has the piston 74 to simplify the drawing. Thus we find this Figure 4 all the elements shown in Figure 3A. However, if the unlocking of the lock 10 is implemented in a conventional manner by driving the retaining bars 26 in the direction G opposed to F so as to carry the other notches 46 of the pair of notches 46 of each of the bars retaining 26, the right of the ring 42, the unlocking of the axial latch 54 is him, made by 2910517 12 through a retaining bar 26. Indeed, since the movable member 74 is no longer put in place. then one of the retaining bars 26 is intended to unlock the axial latch 54. For this, it is provided that in the unlocking position of the retaining bar 26, the centripetal return 28 of one of its ends, to pivot the transverse strip 56 which in turn comes to depress the axial lock 54 in its axial orifice 52. Thus, starting from the position of the transverse strip 56 and the axial lock 54 shown in detail in Figure 1B, as and when the e nfunction of the rod 68 in the axial passage 20, the outer edge of the centripetal return 28 of the retaining bar 26 has come to bear, no longer on the lower face 64 of the transverse strip 56, but on its rear face 62, this which caused the pivoting of the transverse strip 56 and consequently the depression of the axial lock 54 in its axial orifice 52. In this position, the barrel 14 is consequently both unlocked thanks to the position of the notches 46 with respect to the ring 42, but also unlocked thanks to the position of the axial lock 54, and this, in a position quite identical to the position of the lock illustrated in Figure 3A.

According to a second embodiment of the invention not shown, provision is made for the installation of an elastically compressible element on the outer edge of the centripetal return 28 of the retaining bar 26 and oriented in the direction of the cross-section strip. 56. In this way, it is possible to overcome the inaccuracy of the relative positions of the retaining bar 26 and the crossbar 56 in the unlocking position. Of course, there is provided an elastically compressible element whose stiffness is greater than that of the resilient means which recall the axial lock 54 so that it can retract normally.

In addition, thanks to this elastically compressible element, the depth of the sizes of the key is also eliminated. Indeed, it is understood from Figure 4, that the position of the notches 46 of the upper bar 26 is adapted to be able to ensure both the unlocking and also the unlocking of the axial lock 54. Also, by the As an intermediate of the elastically compressible element, the transverse rule 56 can be pivoted regardless of the size depth.

Claims (10)

  A lock (10) comprising a lock barrel (12) and a barrel (14), said barrel being adapted to receive a key (66) for operating said barrel in said barrel, said key having a rod (68) of which end has axial shoulders (72) of different lengths to define a combination, said barrel (14) having an axial passageway (20) and retaining bars (26) radially mounted around said passageway, said pathway passage being adapted to receive said rod (68), said retaining bars (26) being movably mounted in axial translation between a locking position where said barrel (14) is locked in rotation inside said barrel (12) and an unlocking position where said barrel is free to rotate, said retaining strips (26) being adapted to bear on said axial shoulders (72) when said key shank is introduced into said liner; n axial passage (20) so as to bring said retaining bars (26) in said unlocked position; characterized in that said barrel (12) further comprises an axial locking latch (54), said locking axial lock being movable in translation between a locking position in which said axial locking latch (54) is adapted to lock said barrel (14) rotating and an unlocking position wherein said barrel (14) is free to rotate relative to said axial locking latch (54); and in that said key (66) further has a movable member (74) adapted to cause said axial locking latch (54) to be driven to said unlocking position when said rod (68) is introduced into said latch path. axial passage (20).   2. A lock according to claim 1, characterized in that said bars (26) are movable in translation towards two opposite unlocking positions with respect to said locking position, and that towards one of said two positions of unlocking, at least one of said bars causes said locking axial lock (54) to said unlocking position.   3. Lock according to claim 1 or 2, characterized in that said barrel (12) has an internal shoulder (50) and an axial orifice (52) which opens into said internal shoulder, said axial locking latch (54) being slidably mounted in said axial orifice (52).   4. Lock according to claim 3, characterized in that said axial orifice (52) is provided with elastic return means for maintaining said axial locking latch (54) projecting from said internal shoulder (50).   5. Lock according to any one of claims 1 to 4, characterized in that said barrel (14) has an axial locking recess (52) for receiving said locking axial lock (54). 15   6. Lock according to any one of claims 1 to 5, characterized in that said barrel (14) is equipped with a pivoting member (56) about a transverse axis (57), said one of said bars (26) being adapted to pivot said pivoting member to drive said axial locking latch (54) to said unlocking position. 20   7. Lock according to claim 6, characterized in that said pivoting member (56) is eccentrically mounted relative to said passageway (20) and in that said cylinder (14) comprises a support member (65) forming a ramp located in said barrel (14), in a position diametrically opposed to said pivoting member (56). 25   8. Lock according to any one of claims 1 to 7, characterized in that said movable member (74) comprises a piston slidably mounted across said rod (68).   9. Lock according to claim 8, characterized in that said piston has two opposite ends (76, 78) adapted to come respectively protruding from said rod (68) in two diametrically opposite zones. 2910517 16   10. A key for operating a cylinder in a lock barrel, said key having a rod (68) whose end has axial shoulders (72) of different lengths to define a combination, said barrel (14) having a path axial passage 5 (20) and retaining bars (26) mounted radially around said passageway, said passageway being adapted to receive said rod (68), said retaining strips (26) being mounted to move axially between a locking position where said barrel (14) is locked in rotation inside said barrel (12) and an unlocking position where said barrel is free to rotate, said retaining strips (26) being adapted to bear on said axial shoulders (72) when said key shank is introduced into said axial passageway (20) so as to bring said retaining bars (26) into said unlocked position uillé; characterized in that said barrel (12) further comprises an axial locking latch (54), said locking axial lock being movable in translation between a locking position in which said axial locking latch (54) is adapted to block said barrel (14) in rotation and an unlocking position in which said barrel (14) is free to rotate relative to said axial locking latch (54); and in that said key (66) further has a movable member (74) adapted to drive said axial locking latch (54) to said unlocking position when said rod (68) is introduced into said passageway axial (20) .25