CZ2004882A3 - Profile system for forming cross-sections of flat keys for lock cylinders and the flat key per se - Google Patents

Abstract

The invention relates to a profile system for forming the cross-section of flat keys (1, 7, 10, 15) and of key channels (9) in closing cylinders. Said system comprises grooves (2, 3, 11, 12, 13, 13', 14, 14', 16) or ribs (2', 3') of a guiding and variation profile. A branching groove (4, 8, 17) or branching rib (4', 8') branches off from at least one groove (2, 3, 16) or rib (2', 3'), and its groove direction or angular position are different from that of the groove (2, 3, 16) or rib (2', 3') from which it branches off, diverging at a 60 DEG angle, for example. The branching grooves (4, 8, 17) or branching ribs (4', 8') can branch off as a bifurcation from the end of a groove (4, 8, 17) or rib (2', 3'), but preferably from a lateral flank of a groove (4, 8, 17).

Description

Profile system for creating cross-section of flat keys for lock cylinders and flat key

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a profile system for forming cross-sections of flat keys for cylindrical lock cylinders, in particular locking systems, with substantially flat and approximately parallel flat sides of the key, with a spine and a toothed key opposite it. pins and body pins which are resiliently loaded in the corresponding key core channels in the direction of the spine, the grooves cut in the flat sides of the flat keys or ribs cut in the key channel are provided as variation profile elements and guiding profile elements z at least one groove in the flat key or rib in the key channel protrudes a branch groove or branch rib whose insertion direction is different from the insertion direction of the groove or rib. The invention further relates to a flat key.

The protection of life, the private sphere and property is of the utmost importance. Therefore, the lock and the key are of particular importance. In locking systems, or access systems, access areas are defined and implemented by assigning each key of the device to one or more locks. In the case of locking systems, this assignment, or exclusion, of the key and the lock with respect to the locking function is carried out on the basis of cylindrical lock cylinders with flat keys with a cross-sectional profile of the keys and a cross-section of the key channel. Only when the contour of the cross-section of the key channel exactly matches the cross-section of the flat key and the cross-section of the key is the key fits into the lock. As soon as the cross-section outline • · o ··· * ·· »

From the flat key intersects the contour of the key channel cross section, the key has no authorization with respect to said lock cylinder.

This assignment between the key and the lock cylinder naturally applies to the profile - that is, the cross-section of the key, in particular the flat key, and the lock cylinder key channel - as well as for the single cylinder and single key that is not directly part of the closure system.

The security requirement corresponds to when the key cannot be copied without everything. The authorized person can obtain a replacement key from the original manufacturer by means of a confirmation of protection and a strict identification check. If key blanks are available on the market, the key manufacturer could easily produce a replacement key using a copy milling machine by creating a toothing on the key face. In addition, if the copy cutter is capable of removing the cross-sectional profile on the flat sides of the original wrench and suitable milling tools are available, the replacement key can also be machined from a metal plate. Thus, if, as a result of restrictions on free market access, it has not yet been possible to produce replacement keys for inaccessible key profiles due to the lack of a corresponding blank, there are already technical possibilities for key manufacturers to make key copies both in terms of gearing and profile. The key profile is sensed mechanically or optically from the side. This lateral sensing is followed by grooving or forward movement of one or more U-shaped, V-shaped or rectangular grooves. By inclined alignment of the key blank, grooves inclined to the central axis of the cross-sectional profile can also be produced, for example as undercut grooves.

BACKGROUND OF THE INVENTION The sides of the sides η · · · · · «··· ·· ·

DE 31 36 314 A1 discloses a key having ribs extending far beyond the imaginary lateral lines of a fictitious central cross section, so that the key does not have straight and approximately parallel flat sides. These protruding ribs carry grooves cut in the direction of movement of the core pins. When these overlapping ribs in the key are filed, the key can easily be inserted into the key channel and possibly even locked. The profile of the wrench should be shaped in such a way that flat grinding does not lead to success.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The object of the invention is to provide a profile system for generating cross-section of flat keys with substantially straight and approximately parallel flat sides, as well as corresponding key channels in cylindrical lock cylinders, so as to create a profile in a single operation. key manufacturers used, was not possible.

This object is achieved by a profile system for generating cross-section of flat keys for cylindrical lock cylinders, in particular locking systems, with substantially flat and approximately parallel flat sides of the key, with the key spine and the key tooth toothed opposite it, for positioning the retaining pins divided into pins and body pins which are resiliently loaded in the corresponding key core channels in the direction of the spine, the grooves cut in the flat sides of the flat keys or ribs cut in the key channel are provided as variation profile elements and guiding profile elements z at least one groove in the flat key or rib in the key channel protruding a branch groove or branch rib whose insertion direction is different from the insertion direction of the groove or rib and differs, for example, by 60 ° According to the invention, the principle is that the branch groove is spaced from the bottom of the guide groove in a flat key, or the branch rib is spaced from the base of the guide rib.

By laterally detecting the profile grooves of the original key, the branch groove is either not detected or is only incomplete. It would have to be created by changing the workpiece clamping and re-scanning the original. Changing the clamping for the angular position of the central axis of the profile groove, different from the original grooving direction of the profile groove, inevitably leads to lateral displacements, so that the branch groove or other groove extending laterally from a groove is neither dimensionally and functionally correct or inexpensive. This can only be achieved in practice in a lock manufacturing plant that has key profile forming machines as well as large milling centers, and there are no clamping errors because there is no need for special work steps with new starting position measurements that errors caused.

It is also difficult to manufacture branch grooves that protrude from the interior of one groove produced by grooving in one flat side of the key, as is the production of a key channel profile in the lock cylinder. Preferably, the branch groove or branch grooves extend from one side or sides of the groove at a distance from the bottom thereof. This creates a clear branching of the grooves in two or more directions, which can hardly be imitated. In order to guarantee that the branch groove (s) is in any case also provided for closure systems for safety reasons (i.e. the most inferior key), it is advantageous if the groove and branch groove (or rib and branch rib) are provided as guiding profile elements. A guide profile is formed inside the locking system at each key so that in any case the required safety is provided. In this case, it is advantageous if the guiding profile elements are provided as opposed and overlapping profile elements with at least one branch groove in one groove or branch rib on one guiding profile rib, respectively, from both the flat sides of the key or the side walls of the key channel. If someone attempted to produce a certain superior profile by grinding the branch groove, the entire cross-section would be weakened and, in most cases, the cross-section would collapse. For the production of a replacement key, therefore, limits are established by simple conventional means which exclude unfair copying of the keys. Care should be taken to ensure that the production of a non-compliant key is regarded as criminally prosecutable for the production of a burglary instrument and that such a key does not undermine the closure system in a manner contrary to competition rules. For reasons of manufacturing or safety, it is advantageous if the stitching width of the branch groove (s) is approximately one third of the length of the side or bottom of the groove from which the branch groove extends.

The object furthermore fulfills a flat key for a lock cylinder with substantially straight and approximately parallel flat sides, with a spine and a toothed tooth opposite it, for positioning the retaining pins divided into core pins and body pins according to the invention, which is based on that from the at least one groove of the overlapping grooves facing one another, a further groove extends in the central region of the key tooth cross-section as a branch groove spaced from the groove bottom, wherein the groove and branch groove directions differ and deviate for example by 60 ° .

This flat key may be the key for the locking system or even a single key. It is particularly advantageous if the branch groove or branch grooves extend from one side or sides of the groove in a flat key at a distance from the bottom of the groove. Such a wrench is particularly difficult to manufacture and much less attenuates the strength of the wrench than a possibly deeper groove in the bottom of the main groove.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawing, exemplary embodiments of the present invention are shown. Giant. 1 to 4 show cross-sections of the keys; FIG. 5 shows a cross-section of the key channel.

DETAILED DESCRIPTION OF THE INVENTION

The key 7 of the closure system has an overlapping guide profile with grooves 2, 3 overlapping the central axis of the profile at approximately the center of its length. Such an embodiment fulfills the task of guiding the profile, that is, positioning the key in the key channel, and overlaps the core pins on the top side, so that it serves as a safety element when detecting the lock cylinder. From one side of the groove 2, the branch groove 4 extends as a triangular groove. The grooving direction (arrow 5) to form the groove 2 and the grooving direction (arrow 6) to form the branch groove 4 differ from each other. Therefore, two operations and clamping in a different position are required for the changed machining direction.

Giant. 2 shows the key 7 and, in its groove 3, in addition a rectangular branch groove 8. In FIG. 5, the corresponding key channel 9 is shown: this channel 9 has ribs 2 'and 3' and branch ribs 4 'and 8 '. The key 1 of FIG. 1 could not be inserted into the channel 9 due to the missing tap groove 8.

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If the original wrench 7 of FIG. 2 was presented to the key manufacturer to produce a replacement key, only the grooves 2 and 3 could be formed in one grooving direction. If it was attempted to deepen the grooves 2 and 1 so that they also included the branch grooves 4 and 8, the key would probably break. The outlines of this deeper piercing are shown in dashed lines in FIG.

FIG. 3 shows a key 10 which is provided with a guide profile according to FIG. 1 with grooves 2 and 3 and a branch groove 4 and still further grooves 11, 12 and 13, 13 ' and 14, 14 ' as a variation profile. In the groove 11 one example of a variation system is shown.

FIG. 4 shows a key 15 having a groove 2, 3 and a branch groove 4 as a guide profile. In a groove 16 which, like all other unmarked grooves, belongs to a variation profile, a branch groove 17 is provided as part of a variation profile. This branch groove 17 has a bottom which is arranged obliquely to the plane of the groove side of the groove 16. This makes the imitation of the key even more difficult. Therefore, not only the profile elements of the guiding profile but also the profile elements of the variation profile with branch grooves can be formed on the sides or on the bottom of the groove (e.g. rectangular grooves or trapezoidal grooves).

When referring to a key, grooves or branch grooves, the same applies equally to the corresponding ribs and branch ribs in the key channel. The invention relates both to an individual key and to a closure system key, wherein the closure system key has a branch groove in the profile region which must necessarily exist on all keys of the closure system in order to guarantee the security effect of all keys in conjunction with the cylinder lock cylinder. or with lock cylinders.

Claims (4)

PATENT CLAIMS A profile system for forming cross-sections of flat keys for cylinder lock cylinders, in particular locking systems, with substantially flat and approximately parallel flat sides of a key, with a spine and a toothed key opposite it and on the face thereof, for positioning the retaining pins divided into core pins and body pins which are resiliently loaded in the corresponding key core channels in the direction of the spine, wherein the grooves cut in the flat sides of the flat keys or the ribs cut in the key channel are provided as variation profile elements and guide profile elements and at least one groove in the flat key or rib in the key channel extends a branch groove or branch rib whose insertion direction is different from that of the groove or rib, characterized in that the branch groove (4, 8, 17) is provided at a distance from the bottom of the guide groove (2, 3) in the flat key (7), or a branch rib (4 ', 8') is provided at a distance from the base of the guide rib (2 ', 3'). Profile system according to claim 1, characterized in that the guide profile grooves (2, 3) and the guide profile ribs (2 ', 3') as guide profile elements in the central cross-sectional area of the tooth of the key (7) or in the central cross-sectional area of the key channel (9), such as overlapping profile elements facing each other from both the flat sides of the key (7) or the side walls of the key channel (9) which cover the core pins in the channel ( 9) for the key, are formed with at least one branch groove (4, 8) on one groove (2, 3) of the flat key (7), or with at least one branch rib (4 ', 8') in the channel (9) for key. Profile system according to either of Claims 1 and 2, characterized in that the groove width of the branch groove (4, 8, 17) is approximately one third of the length of the side or bottom of the groove (2, 3, 16), from which the branch groove extends. 4. A flat key for a lock cylinder with substantially flat and approximately parallel flat sides, with a spine and a toothed tooth opposite it, for positioning the retaining pins divided into core pins and body pins, characterized in that of at least one of the groove (2, 3) from the overlapping grooves (2, 3) facing each other extends in the central cross-sectional area of the key tooth (7) another groove as a branch groove (4, 8) spaced from the bottom of the groove (2, 3), wherein the grooving directions of the groove (2, 3) and the branch groove (4, 8) are different and deviate by, for example, 60 °.