PL173141B1 - Key blank and group of keys made of such blanks - Google Patents

Abstract

Key profile for the key of a lock cylinder. This key profile, when considered in the axial direction from the key tip (S) to the key grip (G), has a letter sequence with letters W and H. One of the letters is designed as a capital letter and the other as a small letter. The capital letter is nearer the key spine (R) and the small letter nearer the key breast. The individual profile regions (RN, BN and Z) are designed in such a way that, even when there are profile variations, in the region of similarity the respective letter sequence remains recognisable and the stability of the key is not impaired. <IMAGE>

Description

The subject of the invention is a key prefabrication for the production of flat keys in cylinder closures.

Key blanks are used to manufacture flat keys that are suitable for actuating cylinder closures. Thanks to the keys with various transverse profiles of the tongue, the keys for individual cylinder closures, and possibly inside hierarchically constructed locking systems, should be distinguishable from each other in order to enable cylinder closures to be closed only with the use of the key assigned in each case, and to prevent opening with the help of another key not belonging to them.

173 141

A number of possibilities are known in the art so that keys for different barrel closures or different locking systems and manufacturers can be distinguished from one another.

Keys have been known for a long time, in which a tongue made of a section, when viewed in the direction of the key axis, an observer can distinguish a transverse profile in the form of a letter or a combination of letters. For example, from Fig. 5 of CH Patent No. 355710, there is known a transverse profile composed of both capital letters S and L, both of the capital letters S and L, when the key is set with the chin down and the crest up, one above the other, without no transition. A similar combination of capital letters S and I is shown in Figure 4 of this description.

Other possibilities of coding the cross profile of the key blade, by its design similar to a combination of letters and numbers, are known from EU patent description No. 386504. It is also known from German trademarks No. 1079798,983887,983888,983889,983 890,983891 and 966562 letter order for the characterization of keys, which enables the determination of appropriate cross profiles of the key blade, as stated in the Wilka Schliesstechnika brochure, for locking systems.

From EP 261298, US 4377082 and US 4653298 a profile of a transverse key blade is known, which appears to be similar to the Latin letter H.

From U.S. Patent No. 4,377,082 - for example from Fig. 4 - a cross profile of a key blade is known, in which a profile configuration similar to the Latin letter H can be recognized.

From US Patent No. 4,653,298 - for example from Fig. 2 - a cross profile of a key blade is known, which in its middle region can be referred to as the Latin letter H. Whereas from DE 2551523 and EP 231599 the shape of the cross profile of a key blade is known, which can be interpreted as a distorted Latin letter w.

When manufacturing flat keys for cylinder closures, it is not only about the initial recognition, on the basis of the cross profile of the key blade, of the origin of the key for specific cylinder closures or the key manufacturer, but also about increasing the security of cylinder closures and locking systems made of such cylinder closures with a hierarchy of keys, by distinguishing the blade profiles from other profiles of the key blade and by making it difficult to counterfeit them. Locking arrangements with a hierarchy of keys are understood to mean those locking arrangements in which, for example, two doors of a residential unit or an office complex are provided with different cylinder locks, the cylinder of one door being opened with a specific key and the cylinder of the other door being opened. with the second key, the key for the second cylinder is also suitable for opening the cylinder of the first door. Such closure systems are known in a variety of embodiments. Often, the locking systems provide for a plurality of cylinder closures to which each individual key is assigned. In order to be able to administer the house in case of necessity or other need to open individual cylinder closures with a single key, a master key is provided which opens and locks all the cylinders of the locking system. The differentiation of individual keys is carried out by different shaping of their transverse blade profile. The overriding key is shaped so that its blade cross profile matches the blade cross profiles of all individual keys. By means of this master key, which is also referred to as master key or master key, all individual cylinder locks can be actuated. The hierarchy of keys can be arranged in several stages.

If, on the one hand, the keys for the cylinder closures, in order to distinguish them, were changed in their blade cross profiles, and on the other hand, certain similar cross profiles of the key blades were provided, in order to be able to create hierarchically shaped locking systems by appropriate variations, and thirdly to enable them by appropriate shaping the cross profiles of the key blades also recognizing the keys, as for each manufacturer of the cylinder locks or keys, there is often a conflict, because the codes used in them, so the sequence of letters and / or numbers visible from the cross profile of the blade, desirable to distinguish the function of the key each time in order to simultaneously meet the relevant requirements from the point of safety technology, and in the case of locking systems certain differentiation, while maintaining the similarity of keys.

173 141

The object of the invention is to develop a blank for the production of flat keys, the profile of the blade cross-section on the one hand would allow for the recognition of the letter sequence, and on the other hand, ensure high security and open up the possibility of variations of the cross-section profile of the blade for locking systems.

This task is solved due to the fact that the profile of the cross-section of the tongue is formed by a profile area on the ridge side formed as a double T area formed by a horizontal upper transverse flange, a horizontal lower transverse flange and a vertical high rib joining the two transverse flanges. , from an intermediate area shaped as an intermediate vertical rib which, starting from the lower side of the lower transverse flange, faces downwards, from a chin-side profiled wave-shaped area formed on the first side extending to the right, starting from the lower vertical end intermediate zebra from the first vertex lying to the right, running downwards, adjacent to the right end of the first side, from the second side extending to the left, adjacent to the lower end, lying to the right of the first vertex, from the second vertex lying to the left, extending downwards adhering ego to the left end of the second side, the third side extending to the right, adjacent to the lower end of the second vertex, the third vertex, lying to the right, extending downward, adjacent to the right end of the third side, and the fourth side extending to the left, connected to the lower end of the third vertex lying to the right, with the viewing direction pointing to the thus formed profile of the key blade, rotated about its axis to the horizontal position, with the chin lying to the left and the spine lying to the right, the following sequence of letters is visible when viewed from the left on right, lowercase w - uppercase H with a connecting line between them.

According to the invention, the vertical intermediate rib is offset against the vertical high rib, and the width of the transverse flange is greater than the horizontal spacing of the opposite outer surfaces of the apex, preferably corresponding to the ratio of the height of the uppercase H to the lowercase W of normal typeface.

In a preferred embodiment, the horizontal spacing of the apex to the left of the left end of the transverse flange is approximately at most equal to that of the outer surface of the apex to the right of the right end of the transverse flange, and the thickness of the sides and peaks is less than the thickness of the high rib and the transverse flange.

According to the invention, the wave has a trapezoidal shape, and the transverse flanges and a high rib on at least one side of the key form a trapezoidal trough shape, extending outwards, preferably with equal shoulders, but the chin side profile area, the chin side profile area, ridge and intermediate area approximately have a ratio of 40: 30.10.

In an embodiment where a key group is desired, the thickness of the cross flange in the keys varies and / or the thickness of the high rib in the keys varies.

In another embodiment, the cross-section of the tongue is formed by a ridge-side profile area having two right-hand profile grooves on the right side surface spaced apart from each other, namely the top right profile groove and the left bottom profile groove, and on its left side surface, in the middle in height position, with respect to both right-hand profile grooves, has a left-hand profile groove from an intermediate region shaped downwards, a vertical intermediate rib adjacent to the profile region, near the right side surface of the key, from the chin-side profile region containing a horizontal rib transverse rib which, starting from the lower end of the intermediate rib, points to the left, a vertical center rib which, starting from the middle area of the lower side of the horizontal transverse rib, points downwards, and a half rib which, starting from the lower end of the vertical middle rib, points horizontally to the left, with the direction of observation directed On the so created profile of the key blade, rotated around its axis to the horizontal position with the chin lying to the left and the spine lying to the right, the following sequence of letters is visible, looking from left to right, capital letter W - lower case letter h with a connecting line lying between them .

173 141

According to the invention, the two right-hand profile grooves are deeper than the left-hand profile groove, wherein at least one profile groove on the outer side of the profile is flared in the form of a trapezoid, preferably a trapezoid with identical legs.

In a preferred embodiment, the horizontal transverse rib, the intermediate rib and the adjoining part of the profile area form a trapezoidal tub shape, and the horizontal transverse rib, the vertical middle rib and the horizontal half rib form a trapezoidal tub shape, but the height ratio of the profile area and the intermediate area is roughly 53: 30: 5.

In an embodiment where a group of keys is needed, the depth of the profile grooves and the width of the profile groove in the keys measured in the vertical direction are variable.

Due to the above features of the key prefabricated element, it is achieved that the cross profile of the key blade in the profile area on the back side and the plane of symmetry in the profile area on the chin side are similar to each other, although the transverse rib enters the upper end of the W shoulder. This produces a flat key which is while handling it is pleasant to the touch. Furthermore, there is a reduction in profile thickness in the key regions from the ridge region to the chin region, which is advantageous since an exact key guiding function is generally required from the ridge, and cross-sectional variations are often used in the ridge-side profile region. If a lot of material is available in it, various variations of the profile can be used in this area without impairing the ability to read the code, and thus the recognizable order of letters.

On the other hand, the narrower design of the profile area on the chin side reduces the material expenditure and therefore the cost and weight of the key.

The combination of a lowercase letter w and a capital letter H with regard to the readability unexpectedly turned out to be somewhat of a difficulty and resulted in an unexpectedly characteristic code form for keys.

The formation of a key blade cross-section profile can be used to manufacture a hierarchical key system for a locking system when at least one key is a master key whose blade cross profile is fully received within the blade cross profile of at least two other keys. This master key is suitable for actuating both lock cylinders which are assigned to both other keys individually.

To sum up, the essential, new and inventive advantage of the invention is that when the key is held horizontally, an easy recognition of the key code is obtained, i.e. in the area of the ridge of a capital letter, and in the area of a chin of a small letter, by appropriately shaping the profile.

The subject of the invention is illustrated in the drawing examples, in which Fig. 1 shows a) a cross profile of a blank for producing a master key for a locking system containing a plurality of cylinder closures, b) -g) - cross profiles of blanks for producing a blank of individual keys for this system 2-a) another key cross profile for another locking system including a plurality of cylinder closures, b) -g) - individual key cross profiles for this locking system, Figure 3 - key made with a cross profile according to Figure 1, and fig. 4 a variant of the cross profile of the key according to fig. 1 a).

In Fig. 1 a, the transverse profile 1 of a tongue can be recognized, made of a key section with a ridge surface R, a chin surface B, a profile region RN, an intermediate region Z and a profile region BN.

The profile region RN on the ridge side R is formed as a double T-profile with an upper cross flange 10, a lower cross flange 12 and a high rib 14. The cross flanges 10 and 12 and the high rib 14 together define the left longitudinal groove 16 trapezoidal and the right groove 18 with a trapezoidal cross-section. The intermediate region Z is formed by an intermediate rib 19 which faces from the underside of the lower transverse flange 12, the intermediate rib 19 being offset to the left with respect to the symmetry plane M.

173 141

As can be seen, the upper surface of the upper transverse flange 10 and the lower surface of the lower transverse flange 12 decrease in height from the symmetry plane M towards the outside. The lower profile region BN, on the chin side B, is formed by trapezoidal longitudinal grooves, the bottom of which lies approximately on the symmetry plane M. This profile region BN, generally designated 20, is formed by a first side 20a which starts from the lower end of the intermediate rib 19 is directed to the right and downwards, with a first vertex 20b which, starting from the right end of the first side 20a, is pointing to the right of the symmetry plane M downwards, from the second side 20c which starting from the lower end of the first vertex 20 is directed to the left , with a second vertex 20d that starts from the left end of side 20c facing downwards, from a third side 20e starting from the lower end of left vertex 20d to the right and downwards, a third vertex 20f starting from right and lower end of side 20e points downwards and again lies on the right side of the plane M and on the fourth side 20e starting from d The lower end of vertex 20f points left and down.

The cross-sectional profiles of the flat wrench according to Fig. 1bf differ from Fig. 1a in the presence or absence and the different size of the ridges 22 on the lower side of the upper transverse flange 10, the ridges 24 on the upper side of the lower transverse flange 12 and / or the bead 28 on the lower side of the lower transverse flange 12. It can be recognized that the upper transverse flange 10 with a ridge surface R has a uniform profile throughout FIG. 1, which is surrounded by hatches in FIG. 1b. This cross-sectional profile of the tongue of FIG. 1b serves to guide all keys in the key channel of the associated cylinder closures.

The master key according to Fig. 1a is matched with the individual keys according to Figs. 1b-f. That is, a master key according to Fig. 1a may be inserted in each key channel of the individual keys according to Figs. 1b-g.

Therefore, the master key according to Fig. 1a may be used to actuate all cylinder closures whose individual key profiles are assigned to Figs. 1b-f, assuming that the profile areas BN on the chin B for all individual keys and for the master key correspond.

Fig. 1g shows a secondary key blade section profile which is derived from the cross profile of the master key according to Fig. 1a. The difference between these keys is that the high rib 14 has a shoulder 23 on its both sides. Naturally, it is also possible that one or two of the beads 23 on the high rib 14 are combined with a shoulder 22 or 24 or 28 according to Fig. 1b, the beads 23 may be tapered gradually or thinner.

From a comparison of Figs. 1a and 1g, it can be seen that the cross profile of a master key blade according to Fig. 1a can be inserted into a key channel which is matched with the individual key according to Fig. 1g.

It can therefore be said that by using or not using one or two protuberances 23 on the high rib 14, further variations in the shape of the key channel and individual keys can be made within the locking arrangement to which the key according to Fig. 1a belongs as a master key which locks e.g. all cylinder closures.

If the drawing sheet of FIG. 1 is now rotated clockwise around a vertical axis perpendicular to the plane of the drawing, all the profiles of the cross-section of the key blade according to FIG. 1 and g can be seen to consist of a lower case letter / w and a capital letter. H. A is the longitudinal axis of the key marked.

FIG. 2a shows the blade section profile of a master key, and FIG. 2b-g shows the associated blade section profiles of individual keys. The symbols R, B, RN, Z, BN and A have the same meaning as in the description of Fig. 1. In the profile region RN, two longitudinal profile grooves 111, 113 in the form of a trapezoid can be recognized on the right side one above the other, and on the left side a longitudinal profile groove 115 in the form of a trapezoid.

To the right of the symmetry plane M, adjacent to the lower end of the profile region RN is an intermediate rib 117 which points downwards. To the intermediate rib 117 adjoins

173 141 cross rib 121 which points to the left and slightly downwards. Adjacent to the lower side of the transverse rib 121 is a vertical middle rib 123 which points downwards coinciding with the plane of symmetry M, and to the lower end of the vertical center rib 123 there is a half rib 125 which is slightly inclined from right to left. The trapezoidal grooves 111, 111 are deeper than the trapezoidal groove 111. The transverse rib Hf the intermediate rib 117 and the lower end of the profile area RN are formed by a trapezoidal profile 127. The second trapezoidal profile 129 is formed by a transverse rib 12, a vertical central rib 123 and a horizontal half-rib 125 .

It can be recognized that the profiles according to Fig. 2b-f differ from the profile according to Fig. 2a in that the upper and lower boundaries of the trapezoidal grooves 111, 113, 115 lie at different heights.

It can also be recognized that the cross-section profile of the key blade according to Fig. 1a matches all the cross-section profiles of the key blade according to Figs. 2b-g. If the drawing sheet of Fig. 2 is now turned around the vertical axis to the drawing plane in a counterclockwise direction, then in all the cross-section profiles of the key blade according to Figs. 2a-g the sequence of the letters in capital W - lower case letter h can be recognized. This recognition of the keys is practically not limited by the variations in the cross profile of the key blade according to Figs. 2b-g, i.e. by the different widths of the trapezoidal grooves 111, 113 and 115 measured in the height direction.

As for the cross profile of the key according to Fig. 2g, it can be recognized that the depths of the trapezoidal grooves 111, 113 and 115 are reduced by the bead 133, 135, 137.

The associated key according to Fig. 2a matches the shape of the key channel which conforms to the cross profile of the blade of the individual keys according to Figs. 2b-g. By means of a bead 133 and / or 134, 137, the thickness of which may vary gradually, still other cross profiles of the individual key blade to which a master key according to FIG. 2a is associated can be obtained.

2a, it can be seen that the thickness of the central rib 123 in the profile region BN is smaller than that in the profile region RN. In the profile region RN, the ridge surface R and the portion of the side surface adjacent to the ridge surface R for all the cross profiles of the key according to Figs. 2a-g are identical, as indicated in Fig. 2c by hatching.

Fig. 3 shows a key made with the transverse profile of the tongue according to Fig. 1a. The cross profile of the blade is marked P, the handle is G, the apex S, and A the longitudinal axis of the key.

Fig. 4 shows a variation of the tongue of the tongue of Fig. 1. The width of the transverse flange 210 is smaller than the width of the transverse flange 212. The cross profile of the key tongue according to Fig. 4 is the tongue cross profile of a master key comparable to that of a master key tongue. according to Fig. 1a.

Also in this transverse profile of the tongues according to FIG. 4, variants according to FIGS. 1b-g are possible. If Fig. 4 is turned clockwise 90 °, the order of the letters w-H will be obtained again, with the case of the letter H being subject to modification from the normal capital letter H.

The upper surface of the transverse flange 210 and the lower surface of the lower transverse flange 212 decrease outwardly in height, starting from the symmetry plane M. This reduction is advantageous in terms of stability and the surface requirement for a key passage in the cylinder.

173 141

Fig.2

173 141

CJO

WHAT

173 141

You

Publishing Department of the UP RP. Circulation of 90 copies

Price PLN 4.00

Claims (17)

Patent claims 1. A prefabricated key for the manufacture of flat keys for cylinder closures, comprising a handle, a tongue made of a section, the profile of which consists of an upper profile area on the ridge side, a lower profile area on the chin side and an intermediate area connecting them, but the shape of its cross-section shows a configuration similar to the form of letters, characterized in that the profile (P) of the tongue section is formed of a profile area (RN) on the side of the ridge (R), shaped as a region (10, 12, 14) in the form of a double T formed by a horizontal upper transverse flange (10), a horizontal lower transverse flange (12) and a vertical high rib (14) connecting the two transverse flanges (10, 12), from an intermediate area (Z) formed as a vertical intermediate rib (19), which starting from the lower side of the lower transverse flange (12) is pointing downwards from the profile area (BN), on the chin side (B), shaped as a wave (20), formed from a first side (20a) extending to the right starting from the lower end of a vertical intermediate rib (19), from a first right vertex (20b) extending downwards adjacent to the right end of the first side (20a) ), from the second side (20c) extending to the left adjacent the lower end lying to the right of the first vertex (20b), from the second vertex (20d) extending to the left, extending downwards, adjacent the left end of the second side (20d), from the third side (20a) extending to the right adjacent to the lower end of the second vertex (20d), from the third vertex (20f) extending to the right, extending downward, adjacent to the right end of the third side (20d) and the fourth side (20g) extending to the left, connected to the lower end of the third, lying to the right, vertex (20f), with the viewing direction towards the thus formed profile (P) of the key blade rotated about its axis (A) d o horizontally, with the chin (B) to the left and the spine (R) to the right, the following order of letters is visible from left to right, lowercase w - uppercase H with a connecting line (19) lying between them. 2. The prefabricated element according to claim A device as claimed in claim 1, characterized in that the vertical intermediate rib (19) is displaced relative to the vertical high rib (14). 3. The prefabricated element according to claim A machine as claimed in claim 1, characterized in that the width of the transverse flange (10, 12) is greater than the horizontal spacing of the outer surfaces of the vertex (20b, 20d) facing away from it, preferably corresponding to the ratio of the height of the upper case H and the lower case W of normal typeface. 4. The prefabricated element according to claim 3. The method of claim 3, characterized in that the horizontal spacing of the apex (20d) located to the left of the left end of the transverse flange (10, 12) is approximately at most equal to the spacing of the outer surface of the apex (20b, 20f) lying to the right of the right end of the transverse flange. (10.12). 5. Prefabricated product according to claim A method as claimed in claim 1, characterized in that the thickness of the sides (20a, 20c, 20e, 20g) and the peaks (20b, 20d, 20f) is less than the thickness of the high rib (14) and the transverse flange (10, 12). 6. The prefabricated element according to claim The method of claim 1, characterized in that the wave (20) has a trapezoidal shape. 7. The prefabricated element according to claim A trapezoidal trough (16, 18) extending outwardly, preferably of equal legs, according to claim 5, characterized in that the transverse flanges (10, 12) and the high rib (14) on at least one side of the key form a trapezoidal trough (16, 18). 8. The prefabricate according to claim The method of claim 1, wherein the chin side profile area (BN) (B), the chin side profile area (RN) (B ') and the intermediate area (Z) have a ratio of approximately 40:30:10. 173 141 9. The prefabricated element according to claim 3. The method according to any of the preceding claims, characterized in that in the case of a group of keys, the thickness of the transverse flange (10, 12) in the keys is variable. 10. The prefabricated element according to claim A method as claimed in any one of the preceding claims, characterized in that for a group of keys the thickness of the high rib ('14) in the keys is variable. 11. A prefabricated key for the manufacture of flat keys for cylinder closures, comprising a handle, a tongue made of a section, the profile of which consists of an upper profile area on the spine side, a lower profile area on the chin side and an intermediate area connecting them, but the shape of its cross-section shows a configuration similar to the letter form, characterized in that the profile (P) of the tongue section is formed by a profile area (RN) on the side of the ridge (R) having on the right side surface two right profile grooves (111, 113) spaced apart from each other. ), namely the right upper profile groove (111) and the left lower profile groove (113), and on its left side surface, in the middle height position, with respect to both right hand profile grooves (111,113), has a left profile groove (115) with intermediate area (Z) shaped downwards, vertical intermediate rib (117), adjacent to the profile area (RN), near the right face side key from the profile area (BN), on the chin side (B), containing a horizontal transverse rib (121) which starts from the lower end of the intermediate rib (117) facing to the left, a vertical center rib (123) which starts from the middle of the lower side region of the horizontal transverse rib (121) is facing downwards and the half-rib (125) which, starting from the lower end of the vertical center rib (123), faces horizontally to the left, with the viewing direction (B) facing the profile thus formed (P) of the key blade, rotated around its axis (A) to a horizontal position with the chin (B) to the left and the spine (R) to the right, the following order of letters is visible from left to right, capital letter W - lower case the letter h with a connecting bar (117) lying between them 12. The prefabricated element according to claim 1 The method of claim 11, characterized in that the two right-hand profile grooves (111, 113) are deeper than the left-hand profile groove (115). 13. The prefabricated element according to claim The method according to claim 11 or 12, characterized in that at least one profile groove (111,113,115) on the outer side of the profile (P) is widened in the form of a trapezoid, preferably in the form of a trapezoid with identical legs. 14. The prefabricated element according to claim The process of claim 11, characterized in that the horizontal transverse rib (121), the intermediate rib (117) and the adjacent part of the profile region (RN) form a trapezoidal tub shape (127). 15. The prefabricated element according to claim The process of claim 11, characterized in that the horizontal transverse rib (121), the vertical central rib (123) and the horizontal half rib (125) form a trapezoidal tub shape (129). 16. The prefabricated element according to claim 16 The method of claim 11, characterized in that the ratio of the height of the profile area (RN), the profile area (BN) and the intermediate area (Z) is approximately 53: 30: 5. 17. The prefabricate according to claim 17 11, 12 or 13, characterized in that, in the case of the group of keys, the depth of the profile grooves (111, 113, 115) and the width of the groove of the profile grooves (111, 113, 115) in the keys measured in the vertical direction are variable.