EP2890856A1

EP2890856A1 - Blank, security key, lock system, and production method

Info

Publication number: EP2890856A1
Application number: EP13755934.0A
Authority: EP
Inventors: Ulrich Kramer; Mirjam CASSANI
Original assignee: Kaba Schliessysteme AG
Current assignee: Dormakaba Schweiz AG
Priority date: 2012-08-29
Filing date: 2013-08-19
Publication date: 2015-07-08
Anticipated expiration: 2033-08-19
Also published as: PT2890856T; RU2015110124A; UA114816C2; IL237430B; HUE035227T2; CH707098B1; DK2890856T3; SG11201501423UA; CN104769197B; JP2015526620A; CN104769197A; SI2890856T1; WO2014032191A1; AU2013308060A2; ES2627994T3; JP6362598B2; AU2013308060A1; IL237430A0; HK1212002A1; MY169395A

Abstract

The invention relates to a blank (R) having two parallel lateral grooves RB-SN and a central connecting piece RB-M between said grooves. The lateral grooves run on a higher plane (N1) in an entry region (RB-E) and on a lower plane (N2) in a first coding region (RB-P). A key (S) is produced from the blank, comprising formations consisting of a central groove RB-MN in the entry region and coding recesses (Cod-V) in the coding region on the central connecting piece RB-M. The lateral grooves of the blank and the central groove of the key produce a new composite blank block-code groove = RB-SN + RB-MN. A special tumbler RB-ZH with lateral shoulders RB-ZH-S is paired with the key in the cylinder (Z), the shape of said shoulders matching the lateral grooves RB-SN and the central groove RB-MN such that, together with the special tumbler, an additional insertion block is formed in the entry region and an additional rotational block is formed in the coding region. Thus, the security of the lock system is substantially increased, and forgeries and unauthorized key copies are also prevented.

Description

ROHLING, SECURITY KEY,

CLOSING SYSTEM AND MANUFACTURING METHOD

The invention relates to a blank, a security key and a

Locking system with security keys and associated cylinders and a method for producing the security key from a blank according to the preamble of the independent claims.

In the locking technique, there are the fundamental tasks, even more difficult to prevent and prevent the unauthorized copying of keys with better and better means to increase the number of possible permutations of a key and thus the security of the locking systems.

From EP 1 185 755, as a next state of the art, a closing system with security reversible keys is known which, at the key tip, has a horizontal block groove with a coded block depth. In the associated cylinder a Blockzuhaltungspaar, consisting of a standard Codierzuhaltung and a prolonged standard Blockzuzuhaltung, attached to the rearmost coding position, which prevents the Ganz-plugging a key with too low block groove. This block-groove coding gives higher

Permutationskapazitäten. Even such a horizontal block groove is still not difficult to copy.

It is therefore an object of the present invention to provide a system with blanks, security keys and associated cylinders, which the

Properties of known systems, in particular the known block code system according to EP 1 185 755, substantially improved with additional safety functions, with improved copy protection for keys and blanks by a shaping which is very difficult to define and copy and which also allows higher permutation capacities. In addition, safe operation over a long period of use and insensitivity to wear should be achieved, and rational, cost-effective mass production should be possible.

Above all, the new design should also require no additional space on the key with multiple coding rows. It should be covered with only one type of blank a whole market area and unauthorized key copies by a locksmith should be prevented.

This object is achieved according to the invention by a blank according to

By a security key with associated cylinder according to claim 9, by a locking system with security keys and associated cylinders according to claim 15, and by a method for producing such key from blanks according to claim 16.

This new blank block code system, for example, is based on the previous block code system and additionally has new features, properties and functions with which the genamiten tasks are solved, as shown and explained with the figures further.

The well-known block code system EP 1 185 755, in contrast, has a locking system with security reversible keys for locking systems with at least three

Coding / tumbler series AI, A2, A3, which are also arranged on the flat sides of the keys S, with associated cylinders Z with pin rows of tumbler pairs consisting of tumblers and counter-tumblers at the positions of a given hole pattern, the keys having a horizontal block groove BN which parallel to the key axis x of the

Key tip to at least the first position PI of a tumbler row on Key runs, and the block groove has a coded block depth Bl, B2, B3, and provided in the associated cylinder at least at the rearmost coding position PI a Blocknut BN corresponding tumbler pair with a standard tumbler as Blockzuhaltung BZ and a prolonged Gegenzuhaltung as a block counter-BG is, so that the block counter-locking BG stands up to the cylinder sleeve 10 when the block groove is too low and thus the Whole- plugging a key with too low block groove is blocked by the tumbler pair, and the Blockzuhaltung BZ with the Blockzuzuhaltung BG after insertion of the key at the position PI is also used as Codierzuhaltung with standard coding stages C l, C2, C3, C4 with respect to rotation of the cylinder.

New, important features of the new blank block code system include: The new blank has two parallel side grooves and a middle land therebetween. The side grooves extend at a high level in an input area and at a low level in a first coding area. From the new blank, a key is made with formations of a center groove in the entrance area and coding recesses on the center bar in Codierbereich. The side grooves of the blank and the center groove of the key provide a new, composite blank block code groove. The key is in the cylinder a new, special

Assigned guard locking with side shoulders, the shape of which correspond to the side grooves and the center groove, so that with the special tumbler an additional insertion lock in the entrance area and an additional turnstile in Codierbereich is formed. This significantly increases the security of the locking system and also prevents counterfeiting and unauthorized key copies.

The new features are not apparent from the known system of EP 1 185 755: Its simple, horizontal block groove BN corresponds to the standard Codierzuhaltungen and it is not lowered and the Blockzuhaltung BZ is a standard Codierzuhaltung the coding series. The following are not available: The two side grooves, lowered from the high level to a low level; the central pier on the blank and on the key with coding recesses; Special locking in the cylinder with additional side rails corresponding to the side grooves and the center groove on the key. The additional insertion lock and the additional turnstile are not possible according to EP 1 185 755.

The invention according to the independent claims allows various advantageous further embodiments with further improvements and optimizations of the sought properties - according to the desired applications, e.g. with the following additional features: with a broadening of the RB groove; with a lowered center bar; with RB coding stages, which differ from the standard coding stages and / or with an additional secondary notch for non-vertical tumbler rows.

The dependent claims relate to advantageous developments of the invention, which allow further advantages in terms of security of a locking system, copy security of blanks, keys and cylinders, with respect to long life, rational production and safe service and a higher number of permutations.

In the following the invention will be explained with reference to embodiments and figures. Showing:

Fig. L schematically a erfmdungsgemässen blank with two vertical

Side grooves and a middle bridge and their levels,

Fig. La - in longitudinal section through the median plane of the tumbler row,

Fig. Lb - in cross-section through the entrance area at the key tip,

FIG. 1c - in the coding region of the first coding position, FIG.

2 a blank with inclined inner walls of the side grooves,

2a - in cross section through the entrance area,

Fig. 2b - in the coding area, a key according to the invention with two side grooves and a central groove in the region of the middle web,

- in longitudinal section, with side grooves, middle bridge and center groove at a high and a low level,

- In cross section in the entrance area, with side grooves, center groove and associated special guard locking with side shoulders, middle part and a coding cutter,

in the coding area at a first coding position,

at a second coding position,

a standard coding stop of the coding series and a standard coding depression,

an example with a broadened RB groove and a broadened special RB guard,

a closing system according to the invention with a key with side grooves, center bar and center groove and an associated cylinder with counter-locking and special guard locking with side shoulders,

- in longitudinal section,

- in cross-section in the entrance area,

in cross-section a key with special tumbler and

Counteracting an associated cylinder,

- in the entrance area with the function entrance barrier,

- in the coding area with the function turnstile,

- In the coding area with a standard Codierzuhaltung the

Coding row

at a first coding position a forged key and the special locking of the cylinder,

on a key different coding levels and groove forms in the input area and in the coding area.

- Standard coding levels on a previous key with previous groove. 10 shows standard coding stages on a new key with new, combined RB grooves,

1 1 new RB coding stages,

12 shows an example of a widened RB groove with RB tumbler,

Fig. 13a in cross-section an example of a blank with an inclined

Coding series with side grooves, center bar and a side groove, Fig. 13b is a plan view of the blank and milling cutters for the production of

Side grooves, middle bar and side groove,

13c is a perspective view of the blank,

14a is a perspective view of a coded from the blank manufactured

key,

Fig. 14b is a cross section of the key with an associated special

Guard locking and a standard guard locking of the coding series,

Fig. 15 views of a key from above and in perspective with

different codings,

16 shows a production method of a blank and a key with cutters in different steps,

Fig. 17-19 another example of a blank and key with a particularly wide

center groove,

Fig. 17 in cross section the key with RB groove in the cylinder with associated

tumblers,

18 is a cross-section of a wrong key at the same position in the cylinder with the RB tumbler,

19a perspective view of the blank with lowered central web,

Fig. 19b shows the key with five coding rows and with codings.

FIGS. 1a-c schematically show a blank R according to the invention with two vertical side grooves RB-SN and a central web RB-M, which at the beginning is at a high level Nl and subsequently lowered to a low level N2 parallel to the key axis x. Here 7 denotes the surface and 5 the median plane of blank and key.

Fig. La shows the blank in longitudinal section through the median plane of a Codierungs- Zuhaltungsreihe A with the Codierstufen Cl - C4 for the standard Codier- zuhaltungen Cod-ZH this coding series A. The side grooves RB-SN extend in an input range RB-E at the Key tip at a high level Nl. And at a low level N2 in the coding range RB-P of the first coding positions PI, P2, which, for example the coding positions LI 1 and R5 of a Linksbzw. Corresponding to the right drilling pattern. The central web RB-M can run continuously at the level of the key surface 7 or lowered.

In the simplest case, the central web RB-M runs continuously through RB-M (l) and is formed only by producing the lowered side grooves (for example by means of a disk milling cutter). Depending on the application, the center bar on the blank in

Coding range RB-P can also be lowered: RB-M (2). Thus, a simpler coding and a more rational production of the keys can be achieved. Manufacturing methods for this purpose are e.g. to Fig. 13b and 16 described.

Fig. Lb shows a cross section through the input area RB-E at the

Key tip with the high level Nl of the side grooves.

Fig. Lc shows in the coding region RB-P the lower level N2 of the lowered

Side grooves and also a (less strong) lowered center bar RB-M (2).

Fig. Lc also shows the widths of the whole RB groove. Side grooves and center bar: bg, bn and bm (see Fig. 3d).

The inventive blank R for producing a security key S with at least two coding / Zuhaltungsreihen Ai on the flat sides of the

Key for an associated cylinder Z with tumblers ZH and mating GZH has two parallel side grooves RB-SN and a central web RB-M between the side grooves, which parallel to the key axis x and are formed symmetrically to the center plane of the coding / Zuhaltungsreihe A. These side grooves RB-SN extend in an input area RB-E at the

Key tip at a high level Nl and in a coding region RB-P of the first coding positions PI, P2 lowered to a lower level N2. The side grooves RB-SN are suitably shaped to correspond to the additional side shoulders RB-ZH-S of an associated special tumbler RB-ZH and an extended counter-tumbler RB-GZH of the cylinder such that side grooves RB-SN and side shoulders RB-ZH ZH-S an additional insertion lock in the entrance area RB-E and an additional turnstile in the coding RB-P are executable.

2a, 2b show a blank R with inclined inner walls 11 of the side grooves RB-SN, which have an angle of inclination Wm to the center plane of the coding row A (Zuhaltungsebene). This inclination angle Wm may e.g. 10 ° - 40 ° and allow further form variants of side grooves and be optimized depending on the application.

Fig. 2a shows a corresponding shape of the side grooves RB-SN in

Input range RB-E and Fig. 2b in the coding RB-P.

On the blank only the side grooves RB-SN and the middle bar RB-M are available. The composite blank block code groove = RB-SN + RB-MN is first formed with the coding and a coding router by manufacturing the center groove RB-MN on the key.

FIGS. 3a-d show a key S according to the invention with the two side grooves RB-SN and a center groove RB-MN, which is manufactured on the middle web RB-M or in its region. In the coding region RB-P, the coding position P 1 is coded with the coding stage Cl and the coding position P2 with the coding stage C2 in this example.

Fig. 3a shows a longitudinal section through the key S. 3b shows a cross section in the input area RB-E with composite RB groove = RB-MN + RJ3-SN. This corresponds to an assigned special

Locking RB-ZH in the cylinder with additional side shoulders RB-ZH-S corresponding to the side grooves RB-SN of the key S.

Furthermore, a coding router 14 for coding standard code lengths Ci (and also of the RB code lengths) is shown, which corresponds to the form of the standard coding positions Cod-ZH. A (illegally) manufactured Blocknut BN im

Entrance area of a key would be locked out by the side shoulders RB-ZH-S of the RB guard (with the additional blocking area Fs, see Figs. 5 and 10). Fig. 3c shows a cross section in the coding region RB-P at the coding position PI here with a lowest coding CI, in which the side grooves RB-SN are at the level N2.

Fig. 3d shows at the coding position P2 a coding C2 with the center groove RB-MN on the central web RB-M.

The width bn of the side grooves RB-SN and the width bm of the center land RB-M are matched to each other. Together, the whole groove width results

bg = bm + 2 bn.

These widths bn and bm may be e.g. in a range of bn = 20-33% and bm = 33-60% of the whole groove width bg.

Preferably, the width bm of the central web is at least 33% of the whole groove width bg and the width bn of the side grooves is at least 20% of the whole groove width bg.

3e shows a standard coding stop Cod-ZH and a standard coding pit Cod-V of the coding series A.

The inventive security key S with at least two coding / Zuhaltungsreihen Ai on the flat sides of the key for an associated cylinder Z with tumblers ZH and Gegenzuhaltungen GZH has in one

Encoding series A has two parallel side grooves RB-SN and a center groove RB-MN between the side grooves, which are parallel to the key axis x and symmetric are formed to the center plane of a coding-Zuhaltungsreihe A, wherein in the region of the center groove RB-MN in a coding RB-P coding recesses at the first coding positions PI, P2 are formed. The key preferably has at least three or more coding rows Ai.

These side grooves RB-SN extend in an input area RB-E at the

Key tip at a high level l and are lowered in a coding region RB-P of the first coding positions PI, P2 to a lower level N2. This creates additional permutations in the coding area.

The side grooves RB-SN are suitably shaped to correspond to the additional side shoulders RB-ZH-S of an associated special tumbler RB-ZH and an extended counter-tumbler RB-GZH of the cylinder, so that with the side grooves RB-SN of the key and the side shoulders RB-ZH-S the guard RB-ZH an additional insertion barrier in the entrance area RB-E or an additional turnstile in the coding RB-P are executable. Wherein in the region of the central web RB-M, the additional center groove RB-MN in the input range RB-E and the codings of PI, P2 in the coding range RB-P can be produced.

Corresponding to the first coding positions PI, P2 on the key, the special tumbler RB-ZH must be arranged at the rearmost position of the tumbler row A in the cylinder.

Fig. 3f shows another example of a key S (2) with a broadening of the RB-groove: RB-N (2) compared to the standard codings of the coding series A: The width bg (2) of the RB-groove (with side grooves RB -SN and center bar RB-M or

Center groove RB-MN) is on both sides by an amount bb greater than the width bcv of the coding wells Cod-V of the coding series A: bg (2) = bcv + 2 bb (see

Figs. 12 and 17). With this broadening, especially for cylindrical tumblers and encodings, further improvements in properties such as

Functional safety, anti-counterfeiting security and durability are achieved. FIGS. 4a, b show a longitudinal and cross-section of an invention

Locking system with a key S with side grooves RB-SN, a lowered central web RB-M (2) and a center groove RB-MN and with an associated cylinder Z with an extended counter-locking RB-GZH and a special locking RB-ZH with the side shoulders RB --ZH-S. These tumblers cause an insertion lock for wrong keys in the entrance area RB-E: once through the center section RB-ZH-M and additionally through the side shoulders RB-ZH-S of the guard locking RB-ZH. By giving wrong keys, which are insufficiently deep

Have center groove or side grooves, then the extended Gegenzuhaltung

RB-GZH rests on the cylinder sleeve 10 and thus the whole insertion of the wrong key is prevented.

In an analogous manner, a rotation lock is exercised in coding region RB-P with inappropriate coding forms and coding depths of a wrong key, in which case the side shoulders RB-ZH-S and / or the middle part RB-M of the special tumbler RB-ZH are present in a wrong coding recess and so that the guard RB-ZH extends beyond the shear line 9 and thus prevents the turning of the key.

The inventive closing system with security keys S with at least two coding / Zuhaltungsreihen Ai on the flat sides of the key and associated cylinders Z with tumblers ZH and Gegenzuhaltungen GZH has key S with two parallel side grooves RB-SN and a center groove RB-MN in a coding row A. on, which are formed parallel to the key axis x and symmetrical to the center plane of the tumbler row A, with coding recesses in the region of the center groove RB-MN at the first coding positions PI, P2. These side grooves RB-SN extend in an input region RB-E at the key tip at a high level Nl and in an encoding region RB-P of the first one

Coding positions PI, P2 they are lowered to a lower level N2. The assigned cylinders Z point to the rearmost coding position PI, P2 of the Cylinder a special locking RB-ZH with additional side shoulders

RB-ZH-S on.

These side shoulders RB-ZH-S of the tumbler RB-ZH are shaped to correspond to the side grooves RB-SN of the key, wherein at a first coding position PI, P2, the length ls of the tumbler RB-ZH and counter-tumbler RB- GZH up to the side shoulder RB-ZH-S corresponds to the distance ds of cylinder sleeve 10 to the side groove RB-SN and the length lz of the guard RB-ZH to

Side shoulder RB-ZH-S corresponds to the distance dz from shearing line 9 to side groove RB-SN, with a tolerance range to, so that with the side grooves RB-SN of the key and the side shoulders RB-ZH-S of the assigned special locking RB- ZH an additional Einstecksperre in the input range RB-E and an additional turnstile in the coding RB-P are executable by in the missing or too low deep side grooves RB-SN in the input area, the Gegenzuhaltung RB-GZH rests on the cylinder sleeve 10 (insertion lock) and in Codierbereich the special guard RB-ZH extends beyond the shear line 9 (turnstile).

For example, FIGS. 5-8 further illustrate the functions of the new blank block code system and show in cross-section a key and a special tumbler RB-ZH and a counter-tumbler RB-GZH of an associated cylinder.

Fig. 5 illustrates the function of the ingress barrier RB-E. The tumbler pair RB-ZH + RB-GZH has a length ls to the side shoulder RB-ZH-S and here ds denotes the distance from the cylinder sleeve 10 to the side grooves RB-SN. The length ls plus a small tolerance range to (of for example 0.05 - 0.1 mm) corresponds to the distance ds and thus allows the insertion of the key, while with a wrong key with missing or too low

combined grooves RB-MN and RB-SN the tumbler pair RB-ZH + RB-GZH would stand up on the cylinder sleeve 10 and thus prevent the insertion of a false key (see Fig. 4a). Fig. 6 illustrates the function turnstile in the coding RB-P. With correctly coded grooves RB-MN and RB-SN, in which also the length lz of the associated tumbler RB-ZH to the shoulder RB-ZH-S is not greater than the distance dz from the shear line 9 to the side grooves RB-SN at level N2, the key can be turned. Otherwise not - as illustrated in Fig. 8.

7 shows at a coding position PI, P2 a (previous) standard Codierzuhaltung Cod-ZH the tumbler A series in place of the special tumbler RB-ZH, which may also correspond to the shear line 9. According to the invention, however, the special tumbler RB-ZH is used and not a standard Codierzuhaltung this tumbler A series as in the previous block code according to EP 1 185 755.

8 shows at a first coding position PI, P2 a false (forged) key Sb, in which the coding depth C1 in the area RB-MN would probably be correctly copied in a standard coding pit Cod-V (suitable for a previous standard Codierzuhaltung Cod -ZH of Fig. 7). Then, however, the special RB-ZH guard locking would be with the side shoulders RB-ZH-S at the

Coding recess Cod-V rise and thus beyond the shear line 9 extend (by a distance a locked out) and prevent rotation. This additional turnstile, through the tumblers RB-ZH at the coding stages in the coding region RB-P of a wrong key Sb, is also illustrated in FIGS. 9 and 10. FIG. FIGS. 9-11 show, on a key, different coding stages Ci and

Nutfomien in the input area and at the first coding positions and a comparison of previous block grooves (BN) with new RB grooves.

In comparison with the blocking surface of the previous block groove (BN) in the input area, the blocking surface of a new, composite blank block code RB groove = RB-MN + RB-SN of the same size and blocking effect is wider and less deep. In order to is a larger coding depth range (eg my-coding) to the lowest coding level Cl for the coding of the positions PI, P2 available. Or the blocking surface and the blocking effect of the new RB groove are at the same depth, as in the previous Blocknut (BN), correspondingly larger in the input area RB-E. The distance dN between level Nl and N2 must be at least one coding stage dC. Preferably, N2 corresponds to the lowest coding stage, here Cl in FIGS. 10 and 11.

Fig. 9 shows standard coding stages C 1 -C 4 on a previous or a counterfeit key S b with a previous block groove BN having a depth B 2 lying below the coding stage C 3. For the coding of the coding positions PI, P2, therefore, only two stages remain: Cl and C2.

Fig. 10 shows a new RB groove with a locking surface Fs same size as in Fig. 9 and lesser depth = at the level of the coding C3. For the coding PI, P2 there are therefore three stages left: Cl, C2, C3.

Fig. 1 1 shows a new RB groove with the same depth (B2) as those of the previous block groove BN of Fig. 9 and with much larger blocking surface Fs and

Blocking effect. In addition, the RB coding stages C2 * and C3 * could here be set somewhat lower than the standard coding stages C2, C3, so that three stages are also possible for the coding of PI, P2: C1, C2 *, C3 *. The RB coding stages Ci * may be higher or lower in the coding range than the standard coding stages Ci of the coding series A for the standard tumblers Cod-ZH with a correspondingly different length of the associated special tumbler RB-ZH.

Preferably, at least one RB coding stage Ci * can not correspond to a standard coding stage Ci.

The number of possible permutations and the security against counterfeiting can be significantly increased with the new R-grooves. A previous or a counterfeit key Sb with a previous block groove BN in the input area RB and with previous standard coding recesses (generated by means of a coding cutter 14) would be replaced by the special locking RB-ZH (which corresponds to the RB groove).

- blocked in the entrance area RB-E against insertion (by the additional blocking surfaces Fs)

and at the coding positions PI, P2 in the coding area at all coding stages

Cl, C2, C3 locked against rotation,

even if the depths in the input area and at the coding positions would be the same as in a correct key S with RB-groove and RB-coding, as illustrated in Figs. 6, 8, 9 and 10.

Such a wrong or unauthorized key copy (Sb), that of a

Locksmith would be copied by means of a coding cutter with the same depths in the entrance area and at the coding positions PI, P2 as the original key, would therefore encounter an insertion lock and a turnstile.

Fig. 12 shows another example of a broadened RB groove with RB tumbler compared to the standard Codierzuhaltungen Cod-ZH and Codungsvertiefungen Cod-V of the coding series A with cylindrical tumblers. In addition to the widening bb, here too the distance ba is shown, by which the RB-tumbler RB-ZH extends beyond the coding depressions Cod-V on both sides:

brz (2) = bcv + 2ba (see also Figs. 3e, 3f and 18).

FIGS. 13 and 14 show a further example of a blank and a key according to the invention, in which case the tumbler row A has an angle of inclination Wa of 15 ° to the z-direction.

13a, b, c show in different views the blank R with the new offset side grooves RB-SN and the central web RB-M and with an additional side groove RB-nn. Fig. 13a shows in cross-section the inclination angle Wa of the tumbler row A, the side grooves RB-SN, the central web RB-M and the minor groove RB-nn in the input region RB-E and in the coding RB-P.

Fig. 13b shows a view from above of the rotated by 15 ° blank (thus in the direction of the locking level A).

This figure also illustrates an advantageous, rational production of a blank by first a lowered central web RB-M (2) in the coding RB-P by means of a cylindrical milling 15 and then the side grooves RB-SN in the input RB-E at a level Nl and can be produced in the coding region RB-P at a level N2 by means of a milling cutter 16. In this example with vertical inner walls 11 of the side grooves RB-SN, e.g. by means of a cylindrical cutter 16; for inclined inner walls 1 1 by means of a conical cutter (see example Fig. 2a, b).

Fig. 13c shows the blank in a perspective view.

Preferably, in the case of a blank or a key with an inclined guard locking plane A with an inclination angle Wa> 0 on the inside, an additional side groove RB-nn can adjoin the side groove RB-SN, which side groove forms a support surface orthogonal to the coding guard A plane. Thus, e.g. the inlet of a zero tumbler is enabled or optimized. Such a zero tumbler consists only of an upper part with width bO without lower coding part as illustrated in FIG. 14b.

In the method according to the invention for producing a key S from a blank R, a center groove RB-MN in the input region RB-E and coding recesses Cod-V at the first coding positions PI, P2 in the coding region are produced by means of coding on the blank R by removal of the center web RB-M RB-P made. In this case, the side grooves RB-SN are first produced at a high level Nl on the blank and offset at a lower level N2 with the center web RB-M. Subsequently, with the coding, the second part RB-MN of the combined RB groove = RB-SN + RB-MN and the coding on the middle web RB-M of the key are manufactured. This allows better copy protection and other security features.

A blank with non-lowered central web RB-M can e.g. can be easily manufactured by manufacturing the lowered side grooves RB-SN by means of a disc milling cutter.

Preferably, on the blank first a lowered central web RB-M (2) in the coding (RB-P) by means of a first router and then the side grooves RB-SN in the input area (RB-E) at a high level (Nl) and in

Coding area (RB-P) are produced at a lower level (N2) by means of a second milling cutter. Figs. 14a, b show a coded key S made from the blank with four coding rows AI to A4.

Fig. 14a shows a perspective view of the key with a coding stage Cl at the coding position PI and a coding stage C2 at the coding position P2 in the coding region RB-P, which are mounted on the central web RB-M.

14b shows a cross-section of the key with an associated special lock RB-ZI 1 at a coding position in the coding area RB-P and a standard coding stop Cod-ZH and a standard coding pit Cod-V of the same coding row A (ie from position P3) , 15 shows, from above and in perspective, another example of a key with a RB-groove widened on both sides by bb with a width bg (2) = bcv + 2 bb and with RB coding stages Ci *, which differ from the standard coding stages, here at position P 1: C 1 * at P2: C2 * and at P3: C2. 16 shows a production method of a blank and a key with an inclined guard locking level A with cutters in different steps:

In a first step a by means of a first milling cutter 15 cut a lowered central web RB-M (2) in the coding RB-P and in Sclmtt b milling a side groove RB-nn, then milling by means of a second cutter 16 in step c of the two

Side grooves RB-SN and later in step d by means of a coding cutter 14 mill the center groove RB-MN and the coding wells both in the coding range RB-P (PI, P2) and at the other coding positions P3, P4 etc. of the standard coding of the coding series A.

The central web RB-M (2) is preferably lowered at most up to the height of the uppermost coding stage - here at most up to C2 *. (In FIG. 10 at most up to C3, in FIG. 11 at most up to C3 *.)

FIGS. 17-19 show a further embodiment of a blank and key according to the invention with a vertical tumbler row A in a cylinder. Here, a particularly wide center groove RB-MN having a width bmn e.g. For particularly good guidance of the tumblers by the center groove, with minimal wear, provided. Fig. 17 shows in cross-section the key with RB groove in the cylinder and with associated tumblers of the coding series AI. The special tumbler RB-ZH is in a lowest coding position, e.g. P1: C1, so that the correct key can be turned on the shear line 9. The broadening of the RB-groove compared to the standard codings Cod-V of the same coding series AI is:

2 bb = bg (2) - bcv.

Fig. 18 shows in cross-section a wrong key Sb at the same position in the cylinder with an RB tumbler, the wrong key Sb having a standard coding Cod-V instead of the widened RB grooves RB-SN and RB-MN. Here is the RB-tumbler already on the key surface 7 and thus locks at the shear line 9 against turning. This, even if the width brz of the tumbler RB-ZH is only slightly larger here (ba) than the width bcv of the standard coding pit Cod-V with 2 ba = brz - bcv. Because the spring of

Gegenzuhaltung (see Fig. 4a), the tumbler RB-ZH can not forcibly press in the too narrow depression Cod-V. In contrast to the coding series AI with cylindrical tumblers RB-ZH and Cod-ZH of FIG. 17, the key here also has a further coding series A2 with conical tumblers and depressions Cod-V2.

FIGS. 19a, b show in perspective the blank R and the key S with (at least) five coding series AI-A5 and with codings.

19a shows the blank R with the side grooves RB-SN and the central web RB-M in the input region RB-E and lowered in the coding region RB-P for the

Coding positions PI, P2.

Fig. 19b shows a coded key S made from the blank, the RB shape being mounted in the vertical tumbler row Al (Wa = 0 °). In the coding area RB-P, the key here at the central web RB-M following

Codings on:

at the coding position PI, the coding C2 and

at the coding position P2, the coding stage C1.

In the context of this description, the following designations are used x, y, z spatial directions

R blank

S key

Sb key so far

Z cylinder

Pi coding positions

Ri, Li right, left coding positions

A Coding, tumbler row (center plane) Ci, Ci * Coding levels, coding

RB blank block code (function)

RB-SN RB side grooves

RB-M RB center bar

RB-MN median to S

RB-N composite RB groove = RB-SN + RB-MN and RB-SN + RB-M, respectively

RB-nn side groove

Cod-V coding well

Cod-ZH coding stop (standard)

Cod-ZH-M Coding Lock Center Piece (Spracht)

RB-ZH special RB tumbler

RB-GZH RB counter-clocking

RB-ZH + RB-GZH RB tumbler pair

RB-ZH-S ZH side shoulder

RB-ZH-M ZH middle section (coding gauge)

Fs additional blocking area

RB-E input area

RB-P coding range (PI, P2 ...) foremost position ls length from RB-ZH + RB-GZH to RB-ZH-S ds distance from 10 to RB-SN

lz length from RB-ZH to RB-ZH-S

to tolerance range

dz distance from 9 to RB-SN

dN distance from Nl to N2

a recess, distance

dC an encoding level

bm width of RB-M

bn width of RB-SN

bg width of RB-N = RB-SN + RB-M bnn width of RB-nn

bg (l) = bcv

bg (2) = bcv + 2 bb

brz width of RB-ZH

bcv width of cod-v

bcz width of Cod-ZH

bb broadening of RB-N: bg (2) = bcv + 2 bb ba brz - bcv = 2 ba

bmn width of RB-MN

bO upper width of ZH

Wm tilt angle of 1 1

Wa inclination angle of A

5 median plane of S

7 surface of S

9 shear line in Z

10 cylinder sleeve

1 1 inner walls of RB-SN

14 coding routers

15, 16 blank cutters

Claims

Blank R for producing a security key with at least two coding / tumbler rows (Ai) on the flat sides of the key for an associated cylinder (Z) with tumblers (ZH) and

Gegenzuhaltungen (GZH),

characterized by two parallel side grooves RB-SN and a central web RB-M between the side grooves, which are formed parallel to the key axis (x) and symmetrical to the center plane of a code / Zuhaltungsreihe (A)

which side grooves RB-SN in an input region (RB-E) at the key tip at a high level (Nl) and in a coding region (RB-P) of the first coding positions (PI, P2) are lowered to a lower level (N2),

the side grooves RB-SN being suitably shaped to correspond to the additional side shoulders RB-ZH-S of an associated special aiming device RB-ZH and an extended counter-locking device RB-GZH of the cylinder,

so that with the side grooves RB-SN and the side shoulders RB-ZH-S an additional Einstecksperre in the entrance area (RB-E) and an additional turnstile in the coding (RB-P) are executable.

Blank according to claim 1, characterized in that the central web RB-M in the coding region (RB-P) is lowered (RB-M (2)).

Blank according to claim 1 or 2, characterized in that the entire width bg (2) of side grooves RB-SN and center bar RB-M on both sides an amount (bb) is larger than the width (bcv) of the coding pits (Cod-V) of the coding row (A): bg (2) = bcv + 2 bb.

4. blank according to one of the preceding claims, characterized in that the width (bm) of the central web RB-M is at least 33% of the entire groove width (bg).

5. Blank according to one of the preceding claims, characterized gekemizeichnet that the width (bn) of a side groove RB-SN is at least 20% of the entire groove width (bg).

6. blank according to one of the preceding claims, characterized in that the inner walls (1 1) of the side grooves RB-SN are inclined with an angle Wm to Zuhaltungsebene (A).

7. blank according to claim 6, characterized in that the angle Wm = 10 ° - 40 °.

8. Blank according to one of the preceding claims, characterized in that at an inclined tumble plane (A) with an inclination angle Wa> 0 on the inside of an additional side groove RB-nn adjoins the side groove RB-SN, which Nebennut a coding-Zuhaltungsebene (A) forms orthogonal bearing surface.

9. safety key S with at least two code / tumbler rows (Ai) on the flat sides of the key for an associated cylinder (Z) with tumblers (ZH) and counter-tumblers (GZH),

characterized by two parallel side grooves RB-SN and a center groove RB-MN between the side grooves parallel to the key axis (x) and symmetrical to the center plane of a code-Zuhaltungsreihe (A) are formed,

wherein in the region of the center groove RB-MN in a coding region RB-P coding recesses at the first coding positions (P 1, P2) are formed

and wherein the side grooves RB-SN are lowered at an input range (RB-E) at the key tip at a high level (Nl) and at a coding range (RB-P) of the first encoding positions (PI, P2) to a lower level N2) .

the side grooves RB-SN being suitably shaped to correspond to the additional side shoulders RB-ZH-S of an associated special tumbler RB-ZH and an extended counter-tumbler RB-GZH of the cylinder,

so that with the side grooves RB-SN of the key and the side shoulders RB-ZH-S of the guard RB-ZH an additional insertion lock in

Input range (RB-E) and an additional turnstile in the coding (RB-P) are executable.

Key according to claim 9, characterized in that the coding recesses of the first coding positions (PI, P2) are formed on a lowered central web RB-M (2).

Key according to claim 9 or 10, characterized in that the total width bg (2) of side grooves RB-SN and center groove RB-MN on both sides by an amount (bb) is greater than the width (bcv) of

Coding recesses (Cod-V) of the coding series (A):

bg (2) = bcv + 2 bb.

Key according to one of Claims 9 to 11, characterized in that, in the case of an inclined guard locking plane (A) with a tilt angle Wa> 0, on the Inside an additional side groove RB-nn adjoins the side groove RB-SN, which side groove forms a support surface to the (A) orthogonal bearing surface.

Key according to one of Claims 9 to 12, characterized in that RB coding stages Ci * in the coding region (RB-P) are higher or lower than the standard coding stages (Ci) of the coding series (A) with correspondingly different lengths of the associated guard locking RB- ZH.

Key according to one of claims 9 to 13, characterized in that the distance (dN) between the high level (Nl) and the lower level (N2) is at least one coding stage (dC).

Locking system with security keys (S) with at least two

Code / Zuhaltungsreihen (Ai) on the flat sides of the key and with associated cylinders (Z) with tumblers (ZH) and

Gegenzuhaltungen (GZH),

characterized by keys (S) having two parallel side grooves RB-SN and a center groove RB-MN which are formed parallel to the key axis (x) and symmetrical to the center plane of a series of attachments (A), with coding recesses in the region of the center groove RB-MN to the first coding positions (PI, P2),

which side grooves RB-SN in an input area (RB-E) at the key tip at a high level (Nl) and in a coding area (RB-P) of the first coding positions (PI, P2) are lowered to a lower level (NT),

and with associated cylinders (Z) with a special tumbler RB-ZH at the rearmost coding position (PI, P2) of the cylinder which has additional sides shouldered RB-ZH-S, these side rails RB-ZH-S of the tumblers RB-ZH being shaped to correspond to the side grooves RB-SN of the key

and wherein at a first coding position (PI, P2) the length (1s) of

Guard locking RB-ZH and counter-locking RB-GZH to the side shoulder

RB-ZH-S corresponds to the distance (ds) from the cylinder sleeve (10) to the side groove RB-SN

and the length (1z) of the tumbler RB-ZH to the side shoulder RB-ZH-S corresponds to the distance (dz) from the shear line (9) to the side groove RB-SN, with a tolerance range (to),

so that with the side grooves RB-SN of the key and the side school RB-ZH-S of the associated special guard RB-ZH an additional insertion lock in the entrance area (RB-E) and an additional turnstile in the coding (RB-P) are executable.

Method for producing a key (S) according to one of Claims 9 to 14 from a blank (R) according to one of Claims 1 to 8 by means of coding,

characterized in that on the blank (R) by ablating the central web RB-M a center groove RB-MN in the input area (RB-E) and

Coding wells (Cod-V) at the first coding positions (PI, P2) in the coding region (RB-P) are made.

A method according to claim 16, characterized in that on the blank first a lowered central web RB-M (2) in the coding region (RB-P) by means of a first milling cutter and then the side grooves RB-SN in

Input area (RB-E) at a high level (Nl) and in the coding area (RB-P) at a lower level (N2) are produced by means of a second cutter.

18. Verfaliren according to claim 17, characterized in that the blank at an inclined guard level (A) with inclination angle Wa> 0 first the lowered central web RB-M (2) and an additional secondary notch RB-nn are produced by means of a first milling cutter.