EP0808970A2 - Cylinder lock - Google Patents

Abstract

Cylinder lock comprises: (a) a cylindrical housing (1), in which an opening (15) leads into one of the sides of the housing with a key channel (3) running in the longitudinal direction with a core (2). A flat key can be used in the key channel (3); (b) several rows of housing pegs (9-13) and core pegs (4-8) forming holders; and (c) a sliding bolt (21) driven by the core (2). The lock is arranged in an opening of an object to be secured and secured there. The novelty is that a supporting disk (16) is arranged in the opening (15) to radially reinforce this part of the inner cylindrical housing section (14). The section (14) is provided with a tangentially running surface (42) extending longitudinally to the housing (1) in the region of the disk (16) on its outer side. The surface (42) is secured to the sliding bolt (21) and gives a defined distortion, distortion direction, and support for the bolt (21).

Description

The invention relates to a cylinder lock, in particular for use on protective devices and traps for slot machines and vending machines, on lattice rolling gates, on movable protective grilles or the like, with a cylinder housing in which a with a cylinder core with a key channel running in the direction of the axis in one on both ends of the Cylinder housing opening opening is rotatably arranged, which can be rotated by a limited amount in the circumferential direction by a flat key to be inserted into the key channel, with several rows of cased and / or adjacent housing pins and associated core pins that form pin tumblers, and with a slide bolt that can be driven by the cylinder core , wherein the plug cylinder lock is arranged in at least one receiving opening of the object to be secured and locked there.

Mortise cylinder locks of the required type are known through a variety of designs. These plug-in cylinder locks, however, are relatively easy and quick to break open, despite the arrangement of numerous housing and core pins, for example by screwing a screw into the key channel, by means of which the cylinder core can be pulled out of the cylinder housing. The pin tumblers are sheared off, the slide bolt is bent and torn off and also torn out of the housing.

The invention has for its object to make a plug-in cylinder lock of the required type much more burglar-proof.

The object is achieved by the features set out in claim 1 .

In the prior art, the outer jacket of the cylinder housing is deformed in the event of a break-in and the walls in the region of the end-face bore are pressed inwards. The slide bolt is either sheared off or bent so far that it can be torn out of the opening of the object to be protected relatively easily. The whole lock can then be pulled out of the opening. Experiments by the applicant have shown that the explosive forces that occur are approximately uniformly transmitted to the wall of the bore and thus to the cylinder jacket, with such large forces that the cylinder is destroyed and the slide bolt torn off and sheared off even under the given conditions with the strongest wall design becomes. It must be taken into account that in the case of protective devices and traps for gaming machines and vending machines or the like, the installation conditions are determined. In particular, the distance fixed between the slide bolt and an inner wall of the object to be protected and cannot be enlarged as desired, so that one is very limited in the area of the inner end section of the plug-in cylinder with regard to constructive measures.

The result of the invention is that the high deformation forces which occur and which are transmitted to the inner end section of the cylinder housing in the event of a break-in are evenly absorbed by the support disk. The support disc prevents deformation of the cylinder housing.

If the plug-in cylinder lock is considered as a body, a tensile force applied to the plug-in cylinder lock in the longitudinal axis direction can deform the slide bolt. Characterized in that a tangential surface is present at the end inner end of the cylinder housing, it is achieved that the slide bolt can lay down and be supported on this surface, so that in the further course of the attempt to break open the slide bolt acts like a wedge in the receiving opening for the plug-in cylinder , that is, the cylinder lock cannot be pulled out of the opening of the object. The greater the tensile force that is applied to the cylinder lock, the greater the wedge effect between the cylinder lock and the slide bolt and the receiving opening of the object to be protected. Support disk, slide bolt and tangential contact surface for the slide bolt thus reinforce the plug-in cylinder lock precisely in the endangered area to such an extent that such a plug-in cylinder lock can no longer be torn out using the screw according to the usual pulling method.

In the embodiment according to claim 2 , the support disk is supported on its circumference evenly on all sides on a shape-matched inner wall of the cylinder housing.

According to claim 3 , the support disk is arranged with a press fit in the opening of the cylinder housing.

In the embodiment according to claim 4 , the support disc is screwed into a thread of the receiving opening.

In the embodiment according to claim 5 , the support disc is glued in, while it is soldered in the embodiment according to claim 6 and welded in the embodiment according to claim 7 .

There are also conceivable within the scope of the inventive concept embodiments in which the cylinder housing is provided with a plurality of steps or shoulders into which a form-adapted support body in the form of a disc engages, so that this not only stiffens and supports the cylinder housing radially but also axially in this area - Claim 8 .

According to claim 9 , the support disc is arranged in an arranged at the inner end of the cylinder housing, enlarged in diameter of the cylinder housing.

According to claim 10 , the support disc consists of armored steel weapon technology, for example as it is used for the casing of battle tanks.

The support disc can also consist of a very hard, high-tempered special steel, in particular armored steel. Such steels can be, for example, martinsite-hardenable steels. In the solution-annealed condition, for example, a martinsite-hardening steel can have the following characteristics: Stretch limit 800 to 1000 N / mm ² strength 1100 to 1300 N / mm ² Elongation at break 15% Constriction 7 to 15% hardness 350 HB

In contrast, the corresponding characteristics of the same martinsite-hardenable steel in the hot-aged state are as follows: Stretch limit 1600 to 2700 N / mm ² strength 1700 to 2800 N / mm ² Elongation at break 4 to 18% Constriction 15 to 50% hardness 500 to 800 HB

Such a martensitic steel can for example 5.0% Mo 18.0% Ni 10.0% Co 1.0% Ti 4-6% Mon 16-19% Ni 7-11% Co 0.3-1.5% Ti or for example 8 to 13% Cr, preferably 8.7 to 9.3% Cr 7.8 to 11% Ni, preferably 8.3 to 10.2% Ni 4.5 to 1% Mo, preferably 2.9 to 1.9% Mo 1.9 to 3.2% Co, preferably 2.0 to 3.1% Co 0.5 to 1.9% Ti, preferably 0.8% Ti exhibit.

While martinsite-hardenable steels are relatively tough and easy to deform in the solution-annealed condition, they are extremely hard in the heat-hardened condition. Such hardnesses can optionally be used for the support disks. The use of sheet metal with extremely high hardness is normally limited due to the lack of weldability, but this does not matter here.

In a preferred embodiment of the invention, the support disk is made of bronze. Bronze has a high pressure absorption capacity, does not burst as easily under pressure and does not deform as for example certain types of steel - claim 11 .

According to claim 12 , CuSn8 is used as the material for the support disk.

It has proven to be advantageous if the material has at least a tensile strength of 390 to 750 N / mm ² , preferably 690 N / mm ² , a 0.2% proof stress of 290 to 700, preferably 640 N / mm ² , an elongation at break from 60 to 10, preferably 10, and a Brinell hardness HB from 90 to 250, preferably 220.

Claim 13 describes an advantageous embodiment.

Another very advantageous embodiment is described in claim 14 . Practically the entire lock is encapsulated in a steel sleeve. This steel jacket sleeve encloses the cylinder housing and is on its outward-facing end section, which protrudes from the object, is also protected on the end face by a protective hood also made of steel.

Claims 15 to 22 describe further inventive embodiments.

According to claim 22 , the protective cover arranged at the end face and facing outwards has a special shape, by means of which the cylinder core is further secured against being pulled outwards.

Further inventive configurations are described in patent claims 23 to 37 .

In the embodiment according to claim 23 , the protective hood radially supports the outward-facing end region of the cylinder core.

A particularly advantageous embodiment is described in claim 24 . In this case, a cylinder core head is connected to the actual cylinder core by a predetermined breaking point, which occurs when an attempt is made to break in predetermined load is separable. In this way it is prevented that only predetermined forces can be transmitted to the storage for the plug-in cylinder lock in the event of a break-in attempt.

Claims 25 to 28 describe advantageous embodiments of the invention.

A further, particularly advantageous embodiment of the invention is described in claim 29 . Solid carbide pins prevent a pulling screw from being screwed into the cylinder core, for example. After a short distance, this hits a solid carbide pin and is deflected by it, so that the cutting edges of the drawing screw become blunt and cannot penetrate further into the material of the cylinder core.

Further, very advantageous embodiments of the invention are described in claims 30 to 32 .

Due to the arrangement of the solid carbide pins according to the invention, a burglary tool, in particular a pull screw, will certainly hit a solid carbide pin.

Claim 33 describes a special, inventive solution for the arrangement of solid carbide pins, which also applies to claim 34 .

Claim 35 describes a further embodiment, in which the cylinder core head is coupled to the actual cylinder core by an adhesive connection, which can be separated when a predetermined load is exceeded.

In the embodiment according to claim 36 , the cylinder core head is coupled to the cylinder core via a plurality of pins or screws which also tear off when a defined shear and / or tensile stress is exceeded.

The predetermined breaking point is formed in the inventive solution according to claim 37 by weakening the cylinder core at a certain point. This weakening is formed by several radially directed recesses, for example bores. At this point, a predetermined breaking point is produced in this way, at which the cylinder core head can be separated from the cylinder core in a defined manner.

Fig. 1

ein Steckzylinderschloß gemäß der Erfindung in perspektivischer Darstellung;

Fig. 2

das aus Fig. 1 ersichtliche Steckzylinderschloß, angeordnet in einer Aufnahmeöffnung einer Wand eines zu schützenden Objektes, zum Beispiel eines Warenautomaten, nach einem Einbruchsversuch mit verformtem Schubriegel, ebenfalls in perspektivischer Darstellung;

Fig. 3

das aus Fig. 2 ersichtliche Steckzylinderschloß nach dem Einbruchsversuch mit verformtem Schubriegel;

Fig. 4

eine teilweise Stirnansicht in Richtung des Pfeiles A der Fig. 5;

Fig. 5

einen Längsschnitt durch ein in einem Warenautomaten oder dergleichen eingebautes Steckzylinderschloß gemäß der Erfindung in verriegeltem Zustand;

Fig. 6

eine Teilansicht in Richtung des Pfeiles B der Fig. 7, nach einem Einbruchsversuch und entsprechend verformtem Schubriegel entsprechend Fig. 2 in verriegeltem Zustand;

Fig. 7

ein Längsschnitt zu Fig. 6 entsprechend Fig. 5 mit vertormtem Schubriegel;

Fig. 8

eine teilweise Stirnansicht in Richtung des Pfeiles C der Fig. 9 nach einem Verdrehen des Zylinderkerns mittels eines nicht dargestellten Flachschlüssels um 90 Grad in Offenstellung;

Fig. 9

einen teilweise Längsachsschnitt zu Fig. 8 in Offenstellung;

Fig. 10

einen Schubriegel in der Seitenansicht;

Fig. 11

eine Ansicht in Richtung des Pfeiles D der Fig. 10;

Fig. 12

eine Ansicht auf die hintere Stirnseite eines Steckzylinderschlosses in eingebautem Zustand.

Fig. 13

ein Steckzylinderschloß gemäß einer weiteren Ausführungsform der Erfindung in perspektivischer Darstellung;

Fig. 14

das aus Fig. 13 ersichtliche Steckzylinderschloß, angeordnet in einer Aufnahmeöffnung einer Wand eines zu schützenden Objektes, zum Beispiel eines Warenautomaten, nach einem Einbruchsversuch mit verformtem Schubriegel, ebenfalls in perspektivischer Darstellung;

Fig. 15

das aus Fig. 14 ersichtliche Steckzylinderschloß nach dem Einbruchsversuch mit verformtem Schubriegel;

Fig. 16

eine teilweise Stirnansicht in Richtung des Pfeiles A in Fig. 17;

Fig. 17

einen Längsschnitt durch ein in einem Warenautomat oder dergleichen eingebauten Steckzylinderschloß gemäß der Erfindung in verriegeltem Zustand;

Fig. 18

eine Teilansicht in Richtung des Pfeiles B der Fig. 19, nach einem Einbruchsversuch und entsprechend verformtem Schubriegel entsprechend Fig. 14 in verriegeltem Zustand;

Fig. 19

einen Längsschnitt zu Fig. 18 entsprechend Fig. 17 mit verformtem Schubriegel;

Fig. 20

eine teilweise Stirnansicht in Richtung des Pfeiles C der Fig. 21 nach einem Verdrehen des Zylinderkerns mittels eines nicht dargestellten Flachschlüssels um 90 Grad in Offenstellung;

Fig. 21

einen teilweisen Längsachsschnitt zu Fig. 20 in Offenstellung;

Fig. 22

eine perspektivische Darstellung, teils im Schnitt, eines Steckzylinderschlosses;

Fig. 23

das aus Fig. 22 ersichtliche Steckzylinderschloß, ebenfalls in perspektivischer Darstellung, teils im Schnitt, wobei der Zylinderkopf nach dem Eindrehen einer Ziehschraube an der Sollbruchstelle abgeschert ist;

Fig. 24

das Ansetzen einer Ziehschraube bei einem Zylinderkern mit Sollbruchstelle gemäß der Erfindung, in der Draufsicht und

Fig. 25

den aus Fig. 24 ersichtlichen Zylinderkern nach einem weiteren Eindrehen der Ziehschraube gemäß Fig. 24 und dem außermittigen Verlaufen der Ziehschraube.

In the drawing, the invention is illustrated - partly schematically - for example. Show it:

Fig. 1

a cylinder lock according to the invention in perspective;

Fig. 2

the plug cylinder lock shown in Figure 1, arranged in a receiving opening of a wall of an object to be protected, for example a vending machine, after an attempted break-in with a deformed slide bolt, also in a perspective view;

Fig. 3

the plug-in cylinder lock shown in Figure 2 after the break-in attempt with a deformed slide bolt.

Fig. 4

a partial end view in the direction of arrow A of FIG. 5;

Fig. 5

a longitudinal section through a plug-in cylinder lock installed in a vending machine or the like according to the invention in the locked state;

Fig. 6

a partial view in the direction of arrow B of Figure 7, after a break-in attempt and correspondingly deformed slide bolt according to Figure 2 in the locked state.

Fig. 7

a longitudinal section to Figure 6 corresponding to Figure 5 with a standardized slide bolt.

Fig. 8

a partial end view in the direction of arrow C of Figure 9 after turning the cylinder core by means of a flat key, not shown, by 90 degrees in the open position;

Fig. 9

a partial longitudinal axis section of Figure 8 in the open position.

Fig. 10

a slide bar in side view;

Fig. 11

a view in the direction of arrow D of Fig. 10;

Fig. 12

a view of the rear end of a cylinder lock in the installed state.

Fig. 13

a cylinder lock according to a further embodiment of the invention in a perspective view;

Fig. 14

the plug-in cylinder lock shown in FIG. 13, arranged in a receiving opening of a wall of an object to be protected, for example a vending machine, after an attempted break-in with a deformed slide bolt, likewise in a perspective view;

Fig. 15

the plug-in cylinder lock shown in FIG. 14 after the attempted break-in with a deformed slide bolt;

Fig. 16

a partial end view in the direction of arrow A in Fig. 17;

Fig. 17

a longitudinal section through a plug-in cylinder lock installed in a vending machine or the like according to the invention in the locked state;

Fig. 18

a partial view in the direction of arrow B of Figure 19, after a break-in attempt and correspondingly deformed slide bolt according to Figure 14 in the locked state.

Fig. 19

a longitudinal section to Figure 18 corresponding to Figure 17 with a deformed slide bolt.

Fig. 20

a partial end view in the direction of arrow C of Figure 21 after turning the cylinder core by means of a flat key, not shown, by 90 degrees in the open position;

Fig. 21

a partial longitudinal axis section of Figure 20 in the open position.

Fig. 22

a perspective view, partly in section, of a cylinder lock;

Fig. 23

the plug-in cylinder lock shown in FIG. 22, also in perspective, partly in section, the cylinder head being sheared off at the predetermined breaking point after a pulling screw has been screwed in;

Fig. 24

the application of a pull screw in a cylinder core with predetermined breaking point according to the invention, in plan view and

Fig. 25

24 after a further screwing in of the pull screw according to FIG. 24 and the eccentric running of the pull screw.

The cylinder lock shown in the drawing has a cylinder housing 1 and a cylinder core 2 rotatably arranged therein in a bore, which has a longitudinally extending key channel 3, into which a flat key, not shown, can be inserted. The flat key can be designed as a longitudinal rib profile flat key and have a plurality of depressions through which it controls core pins 4, 5, 6, 7 and 8, which are arranged in the longitudinal axis direction of the cylinder core 2 and are parallel to one another in the blind bores of the cylinder core 2 and which are longitudinally displaceable Flat key facing ends are tapered (Fig. 5, 7).

Housing pins 9, 10, 11, 12 and 13 are arranged coaxially to the core pins 4, 5, 6, 7 and 8 and are displaceable in bores of the cylinder housing 1 running parallel to one another. The housing pins 9 to 13 are each supported against the restoring force of compression springs, which are only indicated schematically in the drawing and which are each supported against the end face of the relevant housing pin 9 to 13 facing away from the associated core pin 4 to 8, so that the Core pins 4 to 8 are spring-loaded accordingly. The core pins 4 to 8 and the housing pins 9 to 13 form the pin tumblers of the cylinder lock.

• Cu Rest; Sn 7,5 bis 8,5; P 0,01 bis 0,35; Fe 0,1; Ni 0,3; Pb 0,05; Zn 0,3; sonstige zusammen 0,2; Dichte kg/dm³ 8,8.

The cylinder housing 1 has a rear (inner) end section 14, which has a rear-opening opening 15, in which a support disc 16 is arranged. In the present case, the support disk 16 is arranged in the opening 15 with a press fit and is designed as a stepped disk. The opening 15 is circular. In the embodiment shown, the support disk 16 consists of a tin-bronze alloy CuSn8 with, for example, the following analysis:

• Cu balance; Sn 7.5 to 8.5; P 0.01 to 0.35; Fe 0.1; Ni 0.3; Pb 0.05; Zn 0.3; others together 0.2; Density kg / dm ³ 8.8.

• Zugfestigkeit in N/mm² 390 bis 700, vorzugsweise 690 N/mm²; 0,2 % Dehngrenze in N/mm² von 290 bis 700, vorzugsweise 640 N/mm²; Bruchdehnung in Prozent von 60 bis 10, vorzugsweise 10; Brinellhärte 90 bis 250, vorzugsweise 220.

The strength properties of this bronze can be as follows:

• Tensile strength in N / mm ² 390 to 700, preferably 690 N / mm ² ; 0.2% proof stress in N / mm ² from 290 to 700, preferably 640 N / mm ² ; Elongation at break in percent from 60 to 10, preferably 10; Brinell hardness 90 to 250, preferably 220.

As can be seen, the thickness F measured in the axial direction is less than the axial length E of the opening 15 of the cylinder housing section 14. In this way there is an axial gap 17 to the head 18 of a screw 19 which is screwed into a threaded blind hole 20 of the cylinder core 2 . The screw 19 connects a slide bolt 21 to the cylinder core 2 in a gearbox manner. This slide bolt 21 emerges from a slot-shaped recess 22 of the cylinder housing 1 which extends circumferentially over a circular sector. The movement of the cylinder core 2 is limited by a stop pin 23 which, on the one hand, engages in a radial slot 24, which extends approximately by 90 degrees or another angle in the circumferential direction of the cylinder core 2 and, on the other hand, is arranged in a through bore 25 of the cylinder housing 1. The head of the stop pin 23 engages in a bore 26 which is arranged in a steel jacket sleeve 27 which encloses the cylinder housing 1 over most of its length. On the outward-facing length section of the steel jacket sleeve 27, a protective hood 28 made of steel, which is designed in the manner of a sleeve or cap nut, is placed from the outside, which with an axial length section 29 connects the steel jacket sleeve 27 on part of its outwardly facing length section and with a materially integrally connected therewith radial section also the end face the steel jacket sleeve 27 and a part of the end face of the cylinder housing 1 covers.

The protective hood 28 is connected to the steel jacket sleeve 27 and to the cylinder housing 1 by a plurality of radial pins 30 distributed over the circumference, which end at the outer periphery of the length section 29.

At 31, a locking pin is arranged which engages in a slot 32 of a wall 33. The slot 32 extends in the axial longitudinal direction of the cylinder lock. Via this locking pin 31, the reaction forces which are transmitted to the plug-in cylinder lock via the flat key can be absorbed, so that the plug-in cylinder lock cannot twist.

At 34, a further radial pin is arranged, which extends through a through bore 35 of the steel jacket sleeve 27 and engages in a blind bore 36 arranged coaxially thereto, which is arranged in the cylinder housing 1. As a result, the cylinder housing 1 and the steel jacket sleeve 27 are locked against one another.

At 37 and 38 and 39, walls of an object to be protected, for example a slot machine, are indicated. The walls 33, 37 and 38 each have a through hole which are arranged coaxially to one another and into which the cylinder lock is inserted.

The dimension X is generally fixed in slot machines, so that the distance between the end face 40 and the inside 41 of the wall 39 is generally small. Due to the fact that the dimension X is given constructively, there is normally little possibility of constructive design.

As can be seen from FIG. 12, the cylinder housing section 14 is provided on its diametrically opposite side with the locking position of the slide bolt 21 with a tangentially arranged surface 42 running in the direction of the axis of the cylinder housing 1, against which the slide bolt 21 is supported, placed on and supported during an attempted break-in can wedge if necessary.

10 and 11, the design of the slide bolt 21 can be seen more clearly. From this it can be seen that the slide bolt 21 has a slot 43 which opens out laterally and into which the screw head 18 acts as an eccentric drive intervenes. The slide bolt 21 is guided through a radial groove. The slide bolt 21 is rounded on its top and bottom in each case according to a circular arc 44 or 45.

In the embodiment shown, the slide bolt 21 consists of stainless steel, for example X 5 CrNi 18 10, material number 1.4301. Such a steel is an austenitic steel which, when quenched, has the following properties at room temperature:

Density 7.9 kg / dm ³ , the elastic modulus at 20 degrees Celsius 200 kN / mm ² , at 100 degrees Celsius 194.

• Zugfestigkeit 500 bis 700 N/mm², Bruchdehnung ca. 35 %, Kerbschlagzähigkeit 160 mm nach DIN 17010.

The steel jacket sleeve 27 is also made of stainless steel X 10 CrNiS 18 9, material number 1.4305. This is also an austenitic steel which, when quenched, has the following material properties:

• Tensile strength 500 to 700 N / mm ² , elongation at break approx. 35%, impact strength 160 mm according to DIN 17010.

1, 2, 3, 4, 6 and 8 that the protective cover 28 has, in terms of material, integrally connected to it, radially directed sectors 46 or 47 or radial sectors, which face 48 facing outwards Cylinder core 2 overlap on part of its surface. In this way, the cylinder core 2 is still secured against axial pulling out. These radial sectors 46 and 47 extend right up to the key channel 3, so that manipulations with intrusion tools are made more difficult.

If a tensile force P (Fig. 2, 3) is exerted on the plug-in cylinder lock, then this can lead to the fact that the slide bolt 21 is bent backwards as defined in FIGS. 2, 3 and 7 towards the wall 39 because the tangential surface 42 enables a defined deformation of the sliding bolt 21. If an attempt is now made to pull the cylinder lock out of the openings of the object to be secured, this leads to a wedging of the sliding bolt 21 bent backwards in the relevant recess in the wall 38, so that it is impossible to pull it out. The greater the pulling force P on the plug-in cylinder lock, the greater the wedging force. Shear bolt 21 cannot be sheared off as a result. Also the radial deformation of the enlarged diameter cylinder housing section 14 is excluded because this prevents the support disk 16. The forces that occur are distributed approximately uniformly radially over the circumference in the opening 15.

For the embodiment shown in FIGS. 13 to 25, the same reference numerals have been used for parts with the same function as in the embodiment according to FIGS. 1 to 12. The operation of the embodiment according to FIGS. 13 to 25 thus corresponds fundamentally to the embodiment according to FIGS. 1 to 12, so that with regard to the basic structure and the operation of the plug-in cylinder lock, those made in connection with the embodiment according to FIGS. 1 to 12 Executions can be referenced.

The embodiment according to FIGS. 13 to 25 differs from the previously described embodiment as follows:

First, the protective hood 28 is no longer provided with radial sectors 46, as in the embodiment according to FIGS. 1 to 12. Rather, the cylinder core 2 is provided at its outwardly facing end section with a cylinder core head 49 which is enlarged in diameter in the embodiment shown and which is integrally connected to the cylinder core 2 via a predetermined breaking point 50. If necessary, the cylinder core head 49 can also have the same diameter as the cylinder core 2.

The predetermined breaking point 50 is formed by strip-shaped material parts present on both sides of the key channel 3, which in the exemplary embodiment shown is delimited outwards by walls 51 and 52 arranged parallel to one another and arranged symmetrically to the axis of rotation of the cylinder core 2. In the present case, these walls 51, 52 are each formed by a radial groove 53 or 54. The axial width G can be 0.5 mm for each radial groove 53 or 54 in one embodiment. Both grooves 53 and 54 are of the same size and are arranged symmetrically to the longitudinal axis. The axial length H of the cylinder core head 49 is 6 mm in this embodiment, while the grooves 53 and 54 are arranged approximately at an axial distance of approximately the groove width G behind the cylinder core head 49. Of course, the design of the predetermined breaking point 50 can also be different

be carried out. For example, it is possible to provide more than two grooves. Finally, instead of grooves 53 and 54, it is also possible to produce the predetermined breaking point 50 differently, for example by means of several bores which run parallel or at an angle to one another or by other cross-sectional reductions in the area of the predetermined breaking point or by using different materials for the cylinder core 2 and the cylinder core head 49.

It can be clearly seen, for example from FIG. 23, that after the cylinder core head has been sheared off, 49 material strips remain at the predetermined breaking point 50, which are of a substantially smaller cross section than the circular cross section of the cylinder core 2. This means that after a predetermined tensile force is exceeded, the cylinder core head 49 is sheared off. The forces to be exerted on the cylinder core 2, for example by a pull screw 55, can then be dimensioned such that the slide bolt 21 can still be bent in a defined manner in order to be able to bear against the surface 42 (FIG. 12) in order to exert the desired wedging effect . However, before further, destructively large forces can be transmitted to the cylinder core 2, the cylinder core head 49 is sheared off or torn off at the predetermined breaking point 50, so that the attempt to break open here also fails.

22 to 25 that the cylinder core head 49 is provided next to the longitudinal center axis (axis of rotation) of the cylinder core 2 with a solid carbide pin 56 which is thus orthogonal to the axis of rotation of the cylinder core 2 and which is on the outer cylindrical surface of the cylinder core head 49 ends.

Beyond the grooves 53 and 54, that is to say inside the plug lock, the cylinder core 2 in the embodiment shown is provided on each side of its axis of rotation with a further solid carbide pin 57 and 58, respectively. In principle, these solid carbide pins 57, 58 can have the same dimensions, at least in diameter, as the solid carbide pin 56. The solid carbide pins 57 and 58 also each end on the outer cylindrical surface of the cylinder core 2, so that its rotation is not hindered. As a hard metal not only hardened steels but also tungsten carbides and other well-known hard metals come into consideration.

If a pulling screw 55 is now screwed into the key channel 3, it is first deflected from its longitudinal axis by the solid carbide pin 56 (FIG. 25) and then either meets the solid carbide pin 57 or 58, and can therefore only over a small part of its length Key channel 3 - if at all - are screwed in so that the intended full pulling loads cannot be transferred to the cylinder core 2. The screw-in test thus generally ends at the solid carbide pin 57, so that only the cylinder core head 49 can be torn off at the predetermined breaking point 50. Since it is - as described above - through the design and arrangement of the predetermined breaking point 50 in hand to determine the shear or tear-off forces in advance, only those forces are transmitted to the plug-in cylinder lock and its housing that do not cause any harmful stresses mean the storage of the cylinder lock and its inclusion.

The cutting tips of the drawing screw 55 become blunt when screwed in by the solid carbide pin 56, so that they can no longer be screwed into the cylinder core head 49, which is usually made of brass, and the cylinder core 2, which is also made of brass. If a new pull screw 55 were used which does not yet have blunt cutting tips, this will hit in any case on the solid carbide pin 57 and can then also no longer be screwed in.

The features described in the abstract, the patent claims and in the description and evident from the drawing can be essential for realizing the invention both individually and in any combination.

Reference list

1

Cylinder housing

2nd

Cylinder core

3rd

Key channel

4th

Core pin

5

6

7

8th

9

Housing pin

10th

11

12th

13

14

Cylinder housing section, inner, enlarged in diameter

15

opening

16

Support disc

17th

Axial gap between support disk 16 and head 18

18th

head

19th

screw

20th

Threaded blind hole

21

Drawbar

22

Recess

23

Stop pin

24th

Radial slot

25th

Through hole

26

drilling

27

Steel jacket sleeve

28

Protective cover

29

Longitudinal section, axial of 28

30th

Radial pin

31

Locking pin

32

slot

33

wall

34

Radial pin

35

Through hole

36

Blind hole

37

wall

38

39

40

Face

41

inside

42

surface

43

slot

44

Circular arc

45

46

Sector, radial sector

47

Sector, radial sector

48

Face

49

Cylinder head

50

Predetermined breaking point

51

wall

52

53

Radial groove

54

55

Pull screw

56

Solid carbide pin

57

58

A

View direction

B

C.

D

Length of the opening 15 in FIG. 14

E

Thickness of the support disk 16

F

length

G

Width of the grooves 53, 54

H

Axial length of the cylinder core head 49

P

Traction when trying to break open

X

Linear measure

Claims (37)

Plug-in cylinder lock, in particular for use on protective devices and traps for slot machines and vending machines, on lattice roller shutters, on movable protective grilles or the like, with a cylinder housing in which a cylinder core (2) with a key channel (3) running in the axis of the axis in one on both End face of the cylinder housing (1) opening opening (15) is rotatably arranged, which can be driven by a limited amount in the circumferential direction by a flat key to be inserted into the key channel (3), with several rows of housing pins (9 to 13) lying one behind the other and / or next to one another and associated core pins (4 to 8), which form pin tumblers, and with a slide bolt (21) which can be driven by the cylinder core (2), the plug cylinder lock being arranged and locked in at least one receiving opening of the object to be secured, characterized in that in a support disc (16) is arranged in the opening (15) which radially supports this part of the inner cylinder housing section (14) and that the cylinder housing section (14) in the region of the support disc (16) is provided on its outside with a tangential surface (42) extending in the longitudinal direction of the cylinder housing (1) which is opposite the slide bolt (21) in the locked position and gives a defined deformation, direction of deformation and support for the slide bolt (21) in an attempted break-in. Plug-in cylinder lock according to claim 1, characterized in that the supporting disc (16) of the cylinder housing section (14) is supported radially on all sides. Plug-in cylinder lock according to claim 1 or 2, characterized in that the support disc (16) is arranged in the opening (15) with a press fit. Plug-in cylinder lock according to claim 1 or 2, characterized in that the support disc (16) is screwed into the opening (15). Plug-in cylinder lock according to claim 1 or 2, characterized in that the supporting disc (16) is glued into the opening (15). Plug-in cylinder lock according to claim 1 or 2, characterized in that the support disc (16) is soldered into the opening (15). Plug-in cylinder lock according to claim 1 or 2, characterized in that the support disc (16) is welded into the opening (15). Plug-in cylinder lock according to claim 1 or one of the following, characterized in that the opening (15) is provided with a plurality of steps, against which the support disc (16) is supported with a corresponding shape. Plug-in cylinder lock according to claim 1 or one of the following, characterized in that the support disc (16) is arranged at a small axial distance (17) from a screw (19) holding the slide bolt (21) on the cylinder core (2). Plug-in cylinder lock according to claim 1 or one of the following, characterized in that the support disc (16) consists of a highly hard, highly tempered armored steel of weapon technology and has, for example, the following composition: C 0.35 to 0.7%, Si 0.10 to 0.70%, Mn 0.50 to 1.00%, P and S each less than 0.02%, Cr 1.3 to 2.6% , Ni 0.20 to 3.60%, Mo 0.40 to 0.70%, V 0.04 to 0.30% (all figures in percent by weight). Plug-in cylinder lock according to claim 1 or one of the following, characterized in that the support disc (16) consists of a suitable copper-tin alloy according to DIN 17662. Plug-in cylinder lock according to claim 11, characterized in that the support disc (16) consists of CuSn8 with the following properties: Tensile strength in N / mm ² 390 to 700, preferably 690 N / mm ² ; 0.2% proof stress in N / mm ² from 290 to 700, preferably 640 N / mm ² ; Elongation at break in percent from 60 to 10, preferably 10; Brinell hardness 90 to 250, preferably 220. Plug-in cylinder lock according to claim 12, characterized in that the material composition of the material of the support disc (16) is as follows: C u rest; Sn 7.5 to 8.5; P 0.01 to 0.35; Fe 0.1; Ni 0.3; Pb 0.05; Zn 0.3; others together 0.2; Density kg / dm ³ 8.8. Plug-in cylinder lock according to claim 1 or one of the following, characterized in that the cylinder housing (1) is enclosed over the major part of its axial length by a steel jacket sleeve (27) which in its outwardly facing end region is protected by a protective hood (28) according to Art a union nut is overlapped such that the protective hood (28) covers and encloses the steel jacket sleeve (27) over part of its axial length and radially on the front facing outward. Plug-in cylinder lock according to claim 14, characterized in that both the steel casing sleeve (27) and the protective hood (28) consist of a stainless steel DIN 17440, in particular X 10 CrNiS 18 9, material number 1.4305. Plug-in cylinder lock according to claim 15, characterized in that the slide bolt (21) also consists of a stainless steel according to DIN 17440 of the steel grade X 5 CrNi 18 10, material number 1.4301. Plug-in cylinder lock according to claims 15 and 16, characterized in that the density is 7.9 kg / dm ³ , the elastic modulus at 20 degrees Celsius is 200 kN / mm ² , at 100 degrees Celsius 194. Plug-in cylinder lock according to claim 14 or one of the following, characterized in that the type of steel for the slide bolt (21) has the same physical properties as the stainless steel for the steel casing sleeve (27). Plug-in cylinder lock according to claim 1 or one of the following, characterized in that in the region of the outwardly facing longitudinal section of the cylinder housing (1) a plurality of radial pins (30) are arranged, each in a radial through bore of the protective hood (28), each in a coaxial To do this, drill the hole in the steel jacket sleeve (27) and engage in a blind hole in the cylinder housing (1). and that in the region of the inner longitudinal section a further radial pin (34) is arranged, which passes through a radially extending through bore of the protective casing sleeve (27) and is arranged in a blind bore of the cylinder housing (1) arranged coaxially thereto, while between the two radial pins (30 and 34) a further radially extending locking pin (31) is arranged, which engages in a slot (32) of a wall (33), which absorbs reaction forces occurring when closing in the circumferential direction of the cylinder lock, the locking pin (31) in a radially extending bore of the Steel jacket sleeve (27) is arranged. Plug-in cylinder lock according to claim 14 or one of the following, characterized in that the protective hood (28) encompasses the steel casing sleeve (27) for approximately one third to one fifth of the axial length of the plug-in cylinder lock. Plug-in cylinder lock according to claim 1 or one of the following, characterized in that the support disc (16) consists of a high-hard, high-alloy and high-tempered armor steel of weapon technology (armor construction). Plug-in cylinder lock according to claim 14 or one of the following, characterized in that the protective hood (28) with a plurality of radial sectors (46, 47) reaches around the outwardly facing end face of the cylinder core as far as the key channel (3). Plug-in cylinder lock according to Claim 1 or one of the subsequent claims, characterized in that the protective hood (28) radially surrounds the outwardly directed end region of the cylinder core (2) and in that the cylinder core (2) with its outwardly directed end face (48) with the The end face of the protective hood (28) arranged here coincides or is slightly set back axially inwards. Plug-in cylinder lock according to claim 1 or one of the subsequent claims, characterized in that the cylinder core (2) is provided on its outwardly facing longitudinal section over a small part of its axial length with a cylinder core head (49) which is equal to or larger in diameter than the cylinder core (2) is dimensioned and that the protective hood (28) also includes this cylinder core head (49), the cylinder core head (49) being connected to the cylinder core (2) by a predetermined breaking point (50). Plug-in cylinder lock according to claim 24, characterized in that the predetermined breaking point (50) is formed by one or more recesses weakening the diameter of the cylinder core (2) and / or by a less resistant section of material. Plug-in cylinder lock according to claim 25, characterized in that the recesses are designed as diametrically opposed, preferably equally large and identically shaped radial grooves (53, 54) which each delimit a wall (51, 52). Plug-in cylinder lock according to claim 26, characterized in that the walls (51, 52) run parallel to one another and orthogonally to the axis of rotation of the cylinder core (2) and at a radial distance from the key channel (3). Plug-in cylinder lock according to claim 24 or one of the following, characterized in that the predetermined breaking point (50) is dimensioned such that the cylinder core head (49) can be sheared off or torn off from the cylinder core (2) immediately before or immediately after a deformation of the slide bolt (21), before larger loads can be transferred to the storage of the plug-in cylinder housing. Plug-in cylinder lock according to claim 24 or one of the following, characterized in that at least one solid carbide pin (56) is arranged in the cylinder core head (49), the longitudinal axis of which is at a distance from the axis of rotation of the cylinder core (2) and at the smallest possible radial distance from the key channel (3 ) runs such that a pull screw (55) screwed into the key channel (3) can be deflected off-center by the solid carbide pin (56). Plug-in cylinder lock according to claim 24 or one of the following, characterized in that at least one solid carbide pin (57 or 58) is arranged at least on one side, preferably on each side of the axis of rotation of the cylinder core (2), at an axial distance from the predetermined breaking point (50) The longitudinal axes of these solid carbide pins (57, 58) run parallel to the longitudinal axis of the solid carbide pin (56) arranged in the cylinder core head (49). Plug-in cylinder lock according to claim 29 or one of the following, characterized in that the ends of the solid carbide pins (56, 57, 58) end on the cylinder jacket surface of the cylinder core head (49) on the one hand or on the cylinder jacket surface of the cylinder core (2) on the other. Plug-in cylinder lock according to claim 29 or one of the following, characterized in that the solid carbide pins (57, 58) are each arranged between adjacent tumbler pins. Plug-in cylinder lock according to claim 29 or one of the following, characterized in that the connecting line of the center points of solid carbide pins (56, 57 or 57, 58) arranged on different sides of the axis of rotation of the cylinder core (2) each have the axis of rotation of the cylinder core (2) under one sharp angle cuts. Plug-in cylinder lock according to claim 29 or one of the following, characterized in that the connecting line of the centers of the solid carbide pin (56) arranged in the cylinder core head (49) on the one hand and at least one solid carbide pin (58) of the cylinder core arranged on the same side of the axis of rotation of the cylinder core (2) (2) on the other hand runs parallel to the axis of rotation of the cylinder core (2). Plug-in cylinder lock according to claim 29 or one of the following, characterized in that the cylinder core head (49) is coupled to the cylinder core (2) by an adhesive connection which tears off or can be sheared off under a defined load. Plug-in cylinder lock according to claim 29 or one of the following, characterized in that the cylinder core head (49) is coupled to the cylinder core (2) via one or more pins or screws which can be torn off when a defined shear and / or tensile stress is exceeded. Plug-in cylinder lock according to claim 29 or one of the following, characterized in that the predetermined breaking point (50) is formed by a plurality of radially directed recesses on the cylinder core, for example bores.

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