EP2128359A1 - Break-proof double locking cylinder - Google Patents

Abstract

The break-proof double locking cylinder (1) has a single piece cylindrical housing, which has two housing halves (2,3) with a circular cylindrical bearing for cylindrical cores, which are coupled with a pivoted catch provided between the housing halves. A disk (10) is arranged directly at a bar (4) overlying between the axis of a cross hole (5) and the catch.

Description

Technical area

The invention relates to a demolition-secured double lock cylinder with a one-piece cylinder housing having two housing halves, each with a circular cylindrical bearing for cylinder cores, which are coupled with a provided between the housing halves, rotatably mounted locking lug, wherein the housing halves communicate with each other by a web, with a transverse bore for the attachment of the double lock cylinder is equipped and wherein at least one anchored in recesses of the housing halves and the bridge bridging plate is provided to increase the security against breakage.

State of the art

Safety locking cylinders have internals that make it difficult to scan and also to drill. In addition, it is necessary to secure a double lock cylinder against violence. First and foremost, measures are required which prevent or at least make it difficult to break off at the critical point, namely in the region of the web between the two housing halves.

According to the CH 679169 A (CELLAR ERNST) 31.12.1991 a longitudinal bore passes through the housing halves. A steel cable is anchored in the halves by press-fit formations and bridges the recess for the locking nose. As a result, however, the rotational range of the locking lug is massively limited. There are therefore other solutions published in the CH document. Thus, parallel laminated spring tongues are inserted in a continuous recess, which also passes through the web. These spring tongues lie in parallel planes to the level of the tumblers and claim a large part of the space required for the tumblers. It was also proposed in this context to insert thin steel cables laterally of the tumblers in longitudinal bores and to guide through the web. Here again the anchorage is problematic. Of course it comes it also leads to a weakening of the bridge.

In the DE 2343720 A (ZEISS IKON AG) 13.03.1975 a double cylinder is described, which consists of two single cylinders, which are coupled by a separate connector. This fulfills the function of a bridge and engages with lateral arms in the single cylinder housing. A spring steel piece is underlaid and the entire device is fixed with pins. The strength of this construction is determined by the cross-section of the arms, which constitutes only a fraction of the total cross section of a conventional web integrally formed with the double cylinder housing.

Presentation of the invention

The invention aims to achieve an improvement in the critical strength.

It was found that the break at the bridge next to the locking nose emanating. In this sense, the improvement has been achieved in that the plate is directly on the bridge resting between the axis of the transverse bore and the locking lug, possibly the transverse bore partially passing through, is arranged. If a pull is exerted on the lock cylinder by a screw forced into the cylinder core as a burglary auxiliary tool, then the reinforcement according to the invention lies exactly between the pull point and the counter bearing, namely the fastening screw in the web. A pull protection is achieved in this way.

It is expedient if the plate is excluded in the region of the web to the locking lug out and engages at the two ends with full strength in the recesses of the housing halves. A tough material with high strength (eg steel C-10, tensile strength of at least 500 N / mm ² or Ck-15, tensile strength of at least 540 N / mm ² ) is used for the platelet. The recess in the plate allows a spinning of the locking lug and is structurally brought directly to the turning circle of the same. In order to achieve even better material utilization, the bottom of the recess is designed as a circular cylindrical surface and the geometric axis of the Circular cylinder corresponds to the axis of rotation of the cylinder cores or the locking nose. This creates a concave, channel-shaped recess exactly in the middle of the small plate exactly after the turning circle of the locking nose.

It is useful if the recesses are provided in the housing halves in extension of the locking nose facing surface of the web and holes, for example for Stiftzuhaltungen enforce. Thus, the platelet is held in its extended position exactly where the largest tensile forces occur. The recesses cut holes for pins for anchoring in the housing. They can be performed coaxially with the holes for pin tumblers, so anchor according to a further development of the invention, sleeves for reinforcing the holes, the plate similar to the pins. Inside the sleeves move the springs and the housing pins and upstream core pins. These sleeves are relatively long and distribute the tensile forces on the housing very evenly.

A further improvement of the anchoring results from the fact that the plate in the interior of the housing halves by pairs on both sides of the tumblers provided pins, preferably steel pins as Aufbohrschutz is held. The plate can penetrate one or more holes of tumblers and additionally anchored there, if necessary, by means of the sleeves, which line the holes. Flanking and also for fixing the position can thus be the pins, which are also the Aufbohrschutz useful. A particular embodiment is characterized in that the plate has laterally hook-shaped recesses at the ends engaging in the housing halves, in which the pins engage. The direction of the hook is a pulling apart in case of violence against the double lock cylinder. Another practical variant of the anchoring of the plate at one or both ends provides that the pair provided pins penetrate holes of the plate, which lie next to the longitudinal axis of the plate and, together with any holes directly in the longitudinal axis, to a common recess with the Pen cross-sections enveloping contour, eg in cloverleaf, unified or summarized. Thus, the paired pins are at most centered together with central pins or sleeves at one or both ends of the plate and fulfill the anchoring function in particular.

A further embodiment is characterized in that the plate in the projecting into the recesses of the housing halves area has bores that pins are provided in the housing halves, which engage in these holes, for example, up to a third or half of the platelet thickness and preferably that in Continuation of the pins the tumblers are led to the key code-dependent release or blocking of the cylinder. In contrast to the pin-like anchoring pins, these pins only engage in the holes in the plate, without penetrating it. The remaining part of the bore and the subsequent bore channel in the housing half take up the tumblers. So it is, for example, a spring of a sliding housing pin of a tumbler on the end face of the provided for anchoring firmly driven pin. Experiments have shown that a mere engagement of the pin in the bore of the plate causes a sufficient fixation - this especially if lateral pins are provided in pairs. An alternative provides that the holes are designed as blind holes and the pins engage in this and that optionally opposite blind holes are provided to connect to the housing bores for the tumblers. Thus, it is sufficient to carry out blind holes instead of through holes for the engagement of the pins for the purpose of anchoring the plate.

The plate can be made by machining or by cold forming or by forging. A material compression approximately in the region of a recess corresponding to a blind bore has a positive effect on the strength during cold forming or forging. When it comes to drilling, it's not just one meant machining technology. This applies in the same way for the approximately central recess in the plate for the spinning of the locking lug.

The material thickness of the platelet plays a role in addition to the tough material of the platelet. To increase this, the plate can be brought up to the transverse bore for the fastening screw of the double lock cylinder. In this sense, it is expedient if the plate, facing the axis of the transverse bore, has a groove-shaped transverse groove with a cylindrical surface whose radius corresponds to the radius of the transverse bore, and when the transverse groove is part of the transverse bore. A segment of the transverse bore is thus formed by the plate. The channel-shaped transverse groove in the plate can be smooth or threaded.

Particularly in the case of asymmetrical double-locking cylinders, it is expedient if at least one pin anchoring the plate in a half of a housing passes through a hole in the small plate, continues in the housing half and engages in an annular groove in a cylinder core. If the cylinder core is formed longer than is required for the tumblers, then the annular groove may be inserted in the full circular cylindrical part next to the clutch. Thus, the platelet anchoring pin contributes in several respects to increase the safety of the double lock cylinder, especially since additionally the cylinder core is rotatably but axially fixed. This asymmetrical embodiment of a double-locking cylinder leads to the fact that even the plate can be formed asymmetrically and differently with respect to the fixation of the ends in the cylinder housing halves. Under these circumstances, it is expedient if the plate is formed at its two projecting into the housing recesses ends with different holes or blind holes for mutually different anchorages by pins or sleeves and possibly also has different lengths of the two ends. In order to give one or more pins a particularly secure hold, it is expedient if at least one of the pins at least formed over a part of its length with a thread as a bolt and is screwed into the housing halves.

Brief description of the drawings

Embodiments of the subject invention are illustrated in the drawings.

Fig. 1 shows a housing of a double lock cylinder in oblique view with laterally pulled out platelets for better understanding and with sleeves for anchoring the platelet, also pulled out separately, Fig. 2 a variant with full pens, Fig. 3 a complementary or alternative way to Fig. 1 or Fig. 2 . Fig. 4 a longitudinal section through a double lock cylinder with two mounting options of the plate, Fig. 5 a view from above, Fig. 6 a skew with a single-ended plate, Fig. 7 a variant in longitudinal section, Fig. 8 a detail from Fig. 7, Fig. 9 a longitudinal section through another variant of the plate, Fig. 10 another oblique tear with platelets and internal anchoring and Fig. 11 a variant with screwed pins in longitudinal section.

Way (s) for carrying out the invention

A double lock cylinder 1 comprises two housing halves 2, 3, which are connected by a web 4. In the web 4 there is a threaded hole 5 for a fastening screw, for example, in a one-punch lock. Immediately in the plane of the upper web surface, which faces the locking lug (not shown) are recesses 6, 7, which engage in the housing halves 2, 3 and holes 8, 9 for pins 18, 19 (FIG. Fig. 2 ) or for tumblers (eg for spring-loaded housing and core pins) enforce or cut. A small plate 10 is inserted over the web 4 and with the ends in the recesses 6, 7 and according to Fig. 1 secured by sleeves 11, 12. The sleeves 11, 12 are inserted from below into the bores 8, 9 for the tumblers. Once the lock cylinder has been assembled and all tumblers have been filled, the holes 8, 9 and possibly further such holes for tumblers are closed down. The sleeves 11, 12 engage through holes 13, 14 in the plate 10. Stabilizing effect Bore halves 15, 16 in the plate 10, which rest on other, not shown sleeves in the series of tumbler holes or pins in the cylinder housing.

The small plate 10 is centered. The bottom of this recess 17 is formed by a part of a circular cylindrical surface whose radius is slightly larger than the radius of the rotational circle of the locking lug. As a result, the locking nose mounted coaxially with the cylinder cores between the housing halves can be turned through 360 °.

Fig. 2 differs by pins 18, 19 which are inserted into pin bores 20, 21 and the plate 22, the bores 23, 24 by cross-anchoring, in the housing halves 2, 3 anchor. The pins 18, 19 are in the housing halves 2, 3 in extension of the level of Stiftzuhaltungen.

Finally shows Fig. 3 an addition to Fig. 1 or Fig. 2 with additional pins 25, 26, 27, 28, which are driven in the manner of lateral pins, as they are known for drilling protection, in the cylinder housing or the two housing halves 2, 3 in bores 29, 30. These pins 25, 26, 27, 28 engage in hook-shaped recesses 31, 32, 33, 34 at the ends of the plate 35 and contribute to the anchoring in the interior of the double-locking cylinder 1 at. The plate 35 can with holes 13, 14 and bore halves 15, 16 in the sense of Fig. 1 be equipped. Pins in the bore halves 15, 16 prevent the hook-shaped recesses 31 to 34 from dodging inwards on the small plate 35 under tensile stress and the plate 35 is released from the anchoring.

Fig. 4 sets the idea of the invention of Fig. 2 continued. The pin 18 'engages not only by the plate 22', but the front side into an annular groove 40 in a cylinder core 41, which is provided for five tumblers. As another special feature shows Fig. 4 in the plate 22 'has a groove-shaped transverse groove 42 (see also Fig. 9 ), which faces the bore 5 and forms a segment of this bore 5. As a result, the plate 22 'stronger than the plate 22 in Fig. 2 be executed. It is additionally wedged and held by the fastening screw in the bore 5. The Transverse groove 42 may be formed with or without thread.

Fig. 5 shows the double lock cylinder 1 from above in view and in the middle a locking nose 50 with locking nose ring, shown in dashed lines.

Fig. 6 shows a housing of a double lock cylinder 1 with an asymmetric plate 60, which in the housing half 2 by a pin 18 in the sense of Fig. 2 or 18 'according to Fig. 4 is anchored. Dashed line is the possibility of a deeper recess 6 'for a longer plate 60 and with two or more pins 18 and 18' respectively sleeves 11, 12 shown. The plate 60 is fixed in the housing half 3 by two central pins or sleeves (not shown) in the bores 61 and 62 and by lateral pins 63, 64. The latter pass through the hook-shaped recesses 65 and 66 in the plate 60. In the recess 7 in the housing half 3, the corresponding with the aforementioned pins housing bores are visible. Furthermore, it can be seen on the web 4, a slot-shaped opening 67 to the transverse bore 5 and in the plate 60, the transverse groove 42, which completes the transverse bore 5 to a full circular cross-section.

Another variant is in FIGS. 7 and 8 shown. In through holes 70 for the tumblers, which are penetrated by the plate 71, in which there are corresponding holes 72, attack pins 73, for example, only up to half or up to a third of the thickness of the plate 71 a. This is enough to anchor the plate 71. The overlying, free-standing part of the holes 72 is available for the tumblers, such as spring 74, housing pin 75 and core pin 76 available. The latter are shown in dashed lines in one of the holes 70. Fig. 8 shows that in Fig. 7 marked detail on an enlarged scale.

Finally, it is also possible, instead of the through holes 72 in the plate 71 to provide blind holes 90 and blind holes, like this Fig. 9 the example of a plate 91 shows. In the blind holes 90 from below the pins 73 ( Fig. 7, 8 ) and one or more possible blind holes 92 upwardly extend the housing bores for the tumblers to the variety of variations increase. The plate 91 is then of higher strength than with through holes. The plate can also be anchored by means of penetrating pins outside the longitudinal central axis and be equipped with blind holes 92 for the tumblers upwards.

Fig. 10 shows a variant too Fig. 3 or 6 and relates to anchoring with pins 80, 81 and 82, 83 which may be formed as steel pins with anti-drilling function. As already described, these pins can at the edge approximately in outwardly open recesses 31, 32; 33, 34 ( Fig. 3 ) or 65, 66 ( Fig. 6 ) or next to the longitudinal center axis of the plate 84 pass through this. A particular embodiment of this is in Fig. 10 shown. The holes for the above pins as well as for pins or sleeves according to Fig. 1 or 2 are combined to a common recess 85 and 86, the outline of the envelope of the (here four) holes for all pins or sleeves corresponds. Here, this form of anchoring is provided in the same way at both ends of the plate. However, different anchors can be provided on both sides. The execution after Fig. 10 is especially suitable for short cylinders.

All pins or sleeves of all anchoring variants should be as long as possible, so that a maximum support surface in the cylinder housings 2, 3 results, so that the tensile forces and the power flow is distributed as large as possible and absorbed in violence.

All pins 18, 18 ', 19; 25, 26, 27, 28; 63, 64; 73; 80, 81, 82, 83, which serve for fixing the position of the plate 22, 22 ', 35, 60, 71, 91, 84 and for transmitting the tensile or torsional forces on the housing halves 2, 3, were previously as dowel pins with frictional connection shown and described. These pins or some of them can also be screwed into the housing halves 2, 3. Fig. 11 shows such a variant in longitudinal section. Pins 100 are provided over a part of their length with a thread 101 which is screwed into the respective housing half 2 and 3 respectively. In the example of Fig. 11 ends the thread 101 in or before the hole for the plate 102. This damage and possible notch effects on the plate 102nd locked out. The pins 100 carry in the sense of bolts here flat screw heads 103 with central depressions 104 (eg Inbussenkungen), which allow the positive attachment of a screwdriver. The screw heads 103 are in recesses or blind bores of the housing halves 2, 3 and remain within the outline of a cock profile. They hold these parts together even after a possible break or break of the bridge or parts of the brass-made housing halves and to a certain extent form a reinforcing backbone in the interior. Due to the better finish of the parts, there is also a particularly good distribution of force. The pins 100 and head screws are made of high-strength steel, eg the strength class 10.9. Each pin can be designed in this way.

Claims (17)

Demolition-proof double lock cylinder (1) with a one-piece cylinder housing, the two housing halves (2, 3) each having a circular cylindrical bearing for cylinder cores (41), with a between the housing halves (2, 3) provided, rotatably mounted locking lug (50) coupled are, wherein the housing halves (2, 3) by a web (4) communicate with each other, which is equipped with a transverse bore (5) for the attachment of the double lock cylinder (1), and wherein at least one in recesses (6, 6 '. , 7) of the housing halves (2, 3) anchored and the web (4) bridging plate (10, 22, 22 ', 35, 60, 71, 84, 91, 102) is provided to increase the security against breaking, characterized in that the plate (10, 22, 22 ', 35, 60, 71, 84, 91, 102) is arranged directly on the web (4) resting between the axis of the transverse bore (5) and the locking nose (50). Demolition-proof double lock cylinder according to claim 1, characterized in that the small plate (10, 22, 22 ', 35, 60, 71, 84, 91, 102) in the region of the web (4) has a recess (17) towards the locking nose and on the two ends with full strength in the recesses (6, 6 ', 7) of the housing halves (2, 3) engages. Demolition-proof double lock cylinder according to claim 2, characterized in that the bottom of the recess (17) is designed as a circular cylindrical surface and the geometric axis of the circular cylinder of the axis of rotation of the cylinder cores (41) and the locking lug (50). Demolition-secured double lock cylinder according to one of claims 1 to 3, characterized in that the recesses (6, 6 ', 7) in the housing halves (2, 3) in extension of the locking nose (50) facing surface of the web (4) are provided and Pass through bores (8, 9, 70) for pin tumblers (74, 75, 76). Demolition-secured double lock cylinder according to claim 4, characterized in that the plate (10) in the housing halves (2, 3) by sleeves (11, 12) is anchored, which pass through the plate (10) and receive the tumblers in their interior. (Fig. 1) Demolition-secured double lock cylinder according to one of claims 1 to 5, characterized in that the plate (35, 60, 84) in the interior of the housing halves (2, 3) by pairs on both sides of the tumblers provided pins (25, 26, 27, 28, 63, 64, 80, 81, 82, 83) is held. (Figures 3, 6, 10) Demolition-proof double lock cylinder according to claim 6, characterized in that the pairs on both sides of the tumblers provided pins (25, 26, 27, 28, 63, 64, 80, 81, 82, 83) are steel pins for drilling protection. (Figures 3, 6, 10) A demolition-proof double lock cylinder according to claim 6 or 7, characterized in that the plate (35, 60) has laterally hook-shaped recesses (31, 32, 33, 34, 65, 66) on the ends engaging in the housing halves (2, 3) which engage the pins (25, 26, 27, 28, 63, 64). (FIGS. 3, 6) Demolition-proof double lock cylinder according to claim 6 or 7, characterized in that the pairs provided pins (80, 81; 82, 83) penetrate holes of the plate (84), which lie next to the longitudinal axis of the plate (84) and together with any holes directly in the longitudinal axis to a common recess (85, 86) are summarized with the pin cross sections enveloping contour. (Fig. 10) Demolition-proof double lock cylinder according to one of claims 1 to 9, characterized in that the plate (71, 91) in the in the recesses (6, 7) of the housing halves (2, 3) projecting area bores (72, 90) and that pins (73) in the housing halves (2, 3) are provided, which engage in these bores (72, 90) only over part of the plate thickness. (Figs. 7, 8, 9) Demolition-locked double lock cylinder according to claim 10, characterized in that in continuation of the pins (73), the tumblers (74, 75, 76) are guided for key-code-dependent release or blocking of the cylinder. (Fig. 7) Demolition-secured double lock cylinder according to claim 10, characterized in that the holes are designed as blind holes (90) and the pins (73) engage in this. (Fig. 9) Demolition-proof double lock cylinder according to claim 12, characterized in that the blind bores (90) opposite Blind holes (92) are provided, to the housing bores (70) for the tumblers (74, 75, 76) connect. (Fig. 9) Demolition-locked double lock cylinder according to one of claims 1 to 13, characterized in that the plate (22 ', 60, 71, 91, 84, 102), facing the axis of the transverse bore (5), has a groove-shaped transverse groove (42) with a cylindrical surface whose radius corresponds to the radius of the transverse bore (5), and that the transverse groove (42) is a part of the transverse bore (5). (Figures 4, 6, 7, 9, 10, 11) Demolition-proof double lock cylinder according to one of Claims 1 to 14, characterized in that at least one pin (18 ') anchoring the plate (22') in a housing half (2) passes through a bore of the plate (22 ') in the housing half (2). is continued and engages in an annular groove (40) in a cylinder core (41). (Fig. 4) Demolition-secured double lock cylinder according to one of claims 1 to 15, characterized in that the plate (60) at its two in the housing recesses (6, 6 ', 7) projecting ends with different holes (61, 62) or blind holes (90) for both sides different anchors by pins (18, 63, 64) and sleeves (11, 12) is formed and optionally also has different lengths of the two ends. (Fig. 6) A demolition-proof double lock cylinder according to one of claims 1 to 16, characterized in that at least one of the pins (18, 18 ', 19; 25, 26, 27, 28; 63, 64; 73; 80, 81; 82, 83; 100) at least over a part of its length with a thread (101) designed as a screw bolt and in the housing half (2, 3) is screwed.

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