SK287509B6 - Profile system for forming cross-sections of flat keys for lock cylinders and the flat key per se - Google Patents

Abstract

Profile system for forming cross-sections of flat keys (7) for lock cylinders, especially in locking systems is rendered with in principle flat and approximately parallel sides of the key, with key back and with opposite and on the front plate manufactured key teeth, for positioning retainer pins divided to core pins and body pins, which are in corresponding ribs for a cylindrical cores key flexibly burdened in the key back direction. Grooves (2, 3) are cut in flat sides of the flat keys (7) optionally ribs cut in the key channel, are adapted as variation profile elements and guiding profile elements and from at least one groove (2, 3) in the flat key (7) or rib in the channel for the key jets out branching groove (4, 8) or branching rib, of which the direction of cutting-in is different from the direction of cutting-in of the groove (2, 3) or the rib.; A branching groove (4, 8) is set at a certain distance from the guiding groove (2, 3) bottom in the flat key (7), or the branching rib is set at a certain distance from the guiding rib. In the flat key (7), another groove jets out from at least one groove (2, 3) among the grooves (2, 3), which are in opposite direction and are overlapping, in the central cut of the key (7) tooth, as the branching groove (4, 8) at a certain distance from the groove (2, 3) bottom. The directions of groove (2, 3) and branching groove (4, 8) cutting-in are different and they deviate for example by 60 degrees.

Description

BACKGROUND OF THE INVENTION The present invention relates to 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 a key with a key back and opposite toothed teeth on the front 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 key back, the grooves cut in the flat sides of the flat keys or the ribs carved 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 the groove or rib insertion direction. 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 locking systems, access areas are defined and implemented by associating each key of the device with one or more locks. This assignment, or exclusion, of the key and the lock in terms of the locking function for the locking systems takes place on the basis of the cylinder locks with the flat keys of the key cross-section profile and the key channel cross-section. Only when the contour of the cross-section of the key channel exactly matches the cross-section of the flat key and envelops the cross-section, does the key fit into the lock. Once the cross-sectional contour of the flat key intersects the contour of the cross-section of the key channel, the key has no authorization with respect to said lock cylinder.

Naturally, this association between the key and the cylinder lock cylinder for the profile - that is, the cross-section of the key, in particular the flat key, and the key cylinder channel of the lock cylinder - also for the individual cylinder lock and the individual 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 may obtain a replacement key from the original manufacturer by means of a confirmation of detention and a strict identification check. As long as key blanks are available on the market, the key manufacturer could easily produce a replacement key by using a milling cutter by creating a tooth on the key face. In addition, if the copy milling machine is also capable of sensing 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. Therefore, when, 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 in terms of toothing, as well as profile. The key profile is sensed mechanically or optically from the side. This side sensing is followed by grooving or forward movement, respectively, of one or more milling cutters for producing U-shaped grooves, V-shaped grooves or rectangular grooves. By inclining the key blank, it is also possible to produce grooves inclined to the central axis of the cross-sectional profile, for example as undercut grooves.

BACKGROUND OF THE INVENTION

DE 31 36 314 A1 discloses a key having ribs extending far beyond the imaginary lateral lines of a fictitious central cross-section such 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 cut off, the key can be inserted into the key channel and even locked. The profile of the wrench should be shaped in such a way that the abrasive finish is not successful.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The object of the present 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 step. keys used was not possible.

This is accomplished by a profile system for forming cross-section keys for lock cylinders, in particular locking systems, with substantially flat and approximately parallel flat sides of the key, with the back of the key and the toothed key teeth facing 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 back of the key, 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 guiding profile elements az 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 and varies, for example, by 60 [deg.] that is, the branch groove is spaced from the bottom of the guide groove in the flat key, or the branch rib is spaced from the base of the guide rib.

By laterally scanning the profile grooves of the original key, the branch groove is either not detected or 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, which differs from the original groove direction of the profile groove, results in indispensable lateral displacements, so that the branch groove or other groove extending laterally from a groove is neither dimensionally and blown correctly or cheaply. In practice, this can only be achieved in a lock manufacturing plant that has key profile machines as well as large milling centers, and there are no clamping errors because there is no need for special work steps with new baseline measurements these errors.

The production of branch grooves which extend from the inside of a groove produced by grooving in one flat side of the key is also complicated, as is the production of the key channel profile in the cylinder 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 be difficult to imitate. In order to guarantee that the branch groove (s) are in any case also provided in the closure systems for safety reasons (i.e. even for the most inferior key), it is advantageous if the groove and the groove or the rib and the branch groove are designed as guiding profile elements. The guide profile is formed inside the locking system for each key, so that in any case the required safety is given. 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 guide profile, respectively, from both the flat faces 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 cross-section would become weaker and, in most cases, the cross-section would collapse as a result of increasing the groove. Thus, for the production of a replacement key, limits are established by simple conventional means which preclude unfair copying of the keys. Care must be taken that the production of a non-compliant key is considered to be 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 manufacturing and safety reasons, it is advantageous if the groove 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 is further accomplished by a flat key for a cylinder of a lock, essentially with straight and approximately parallel flat sides, with a back and with a toothed tooth opposite it, for positioning the retaining pins divided into core pins and body pins according to the invention. the principle is that from at least one groove of the overlapping grooves facing one another, a further groove protrudes in the central region of the key tooth cross section as a branch groove spaced from the bottom of the groove, the groove and groove groove directions being different and deviating for example 60.

This flat key can be a key for the locking system or even a single key. In particular, it is 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 the tap groove reduces the strength of the wrench much less than any eventually deeper groove in the region of the bottom of the main groove.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawing, exemplary embodiments of the invention are shown. Fig. 1 to 4 show cross-sections of keys; FIG. 5 cross-section of the turnkey channel.

DETAILED DESCRIPTION OF THE INVENTION

The key 1 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 serves as a guiding profile, ie positioning the key in the key channel, and overlaps the core pins on the upper side, so that it serves as a security 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 working operations and clamping in a different position are required to change the machining direction.

Fig. 2 shows the key 7 and, in its groove 3, a rectangular branch groove 8 in addition. FIG. 5 shows a corresponding key channel 9: 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 branch groove 8.

If the original key 7 according to FIG. 2 to produce a replacement key, only the grooves 2 and 3 could be formed in one grooving direction. If the grooves 2 and 3 were to be formed with a deeper plunge so as to also include branch grooves 4 and 8, the key 7 would probably break. The contours of this deeper plunge are shown in FIG. 2 shown in dashed lines.

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

In FIG. 4, a key 15 is shown 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 a part of the variation profile which extends laterally with a groove direction other than the groove direction of the groove 16. This branch groove 17 has a bottom which is inclined to the plane of the side of the groove 16. This makes it even more difficult to imitate the key. Therefore, not only the profile elements of the guide profile but also the profile elements of the variation profile with branch grooves can be formed on the sides or at the bottom of the groove (for example for rectangular grooves or for trapezoidal grooves).

If the key, grooves or branch grooves have been said, the same applies to the corresponding ribs and branch ribs in the key channel accordingly. The invention relates both to an individual key and to a locking system key, wherein the locking system key has a branch groove in that profile area which must necessarily exist for all keys of the locking system in order to guarantee a security effect for all keys in conjunction with a cylinder lock cylinder. or with cylinder lock cylinders.

PATENT CLAIMS

Claims (4)

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 back of the key and with its opposite and front toothed teeth, 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 key back, the grooves cut in the flat sides of the flat keys or the ribs carved 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 spaced apart from the base of the guide groove (2, 3) in the flat key (7) or the branch rib (4 ', 8') is spaced from the base of the guide rib (2 ', 3'). Profile system according to claim 1, characterized in that the guide profile grooves (2, 3) as well as 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), 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) are provided 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) on key. Profile system according to one of claims 1 or 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 substantially with straight and approximately parallel flat sides, with a back and with a toothed tooth opposite it on the front side, for positioning the retaining pins divided into core pins and body pins, characterized in that z of at least one groove (2, 3) from the overlapping grooves (2, 3) facing one another, a further groove extends in the central region of the key tooth cross-section (7) as a branch groove (4, 8) at a distance 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 for example by 60 °.