EP2075394A1 - Method for manufacturing a lock cylinder - Google Patents

Abstract

The method involves projecting a main cross-section contour of a core pin such that a point of the projection of the core pin has a specific distance to an opening of a bore hole, in a cross-section plane of a key channel (3) that is laid via a center line of the bore hole. A contact point of a contour line is found with a contour line of the cross-section of the key channel. A main cross-sectional contour of a drill is projected in the cross-section plane such that a point of the bore hole lies in the center line and third contour line runs through the contact point. An independent claim is also included for a method for boring a small bore hole.

Description

The invention relates to a method for determining the drilling depth for a shortened core bore, which is to be introduced into a cylinder core of a lock cylinder, wherein the finished cylinder core optionally has a keyway projecting into the key channel keyway and in the shortened core bore a tip with a to it adjoining, in particular conical or rounded head surface having core pin, wherein at a not inserted into the keyway matching key or a key inserted in the key channel the tip of the core pin as a result of a plant of the head face at least one contact point of the wall of the key channel a distance from Mouth of the shortened core bore and a drill is used, the head cross-sectional contour has a larger opening angle than the opening angle of the head cross-sectional contour of the core pin.

A lock cylinder has a lock cylinder housing and one or two housing bores. A cylinder core is stored in the housing bore. If the key is not inserted, the cylinder core can not be turned, as it is prevented from being rotated by tumbler pins. If a matching key is inserted into the key channel of the lock cylinder, tumbler pins lying in transverse bores to the axis of rotation of the cylinder core are sorted in such a way that the cylinder core can be rotated. Together with the cylinder core a rotatably coupled with the cylinder core closing member is rotated. The in the blocking position the fulcrum between cylinder core and housing bore crossing housing pins are displaced by the inserted into the keyway matching key in the housing bores. This is done against the restoring force of a tumbler spring. The notch incisions of the inserted into the keyway flat key, the represent the key secret are queried by the tips of core pins, the length of the core pins is adapted to the depth of the respective notch incision. When the key is fully inserted, the tips are located in the notch recesses.

There are several unacceptable opening methods that attempt to operate a lock cylinder, usually only to be closed by a suitable key. The blow key method works with a specially prepared impact wrench. The notch incisions of this key are cut to the lowest level or even one increment above the lowest level. However, the notch incisions of the key are usually cut to the same level. The thus prepared shaft of a striking key is inserted into the key channel of the lock cylinder in such a way that its oblique edges abut against the oblique edges of the tips of the core pins. If an axial impact is now exerted on the key, an impulse is transmitted to the core pins. The core pins transmit this pulse to the housing pins. If the housing pins are removed from the core pins, the rotational locking of the cylinder core is suspended for a short moment since none of the housing pins crosses the rotary joint. To complicate this opening method, for example, in the DE 102 007 019 714 proposed to design the core bore at least one core pin reduced deep, wherein the drilling depth is adapted to the position of the ridge lines of the adjacent sloping flanks of adjacent notches of a striking key, that remains between these teeth ends and the tip of the core core in the shortened core hole a distance. In the Schlagschlüsselmethode no impulse is transmitted to this core pin according to such a configuration, so that the associated housing pin does not lose its blocking position.

The percussion key opening method not only includes the use of percussion keys with all notches cut to the lowest level. In addition, such impact wrenches are used in which the depth of the notch incisions correspond not only to the zeroth, but also to the first, second, third increment. Correspondingly deep here protrude the apex lines of the hitting bevels of adjacent notch incisions in the key channel in the direction of the mouth of the core hole. The distance between these points and the tip of the core pin inserted in the shortened core hole can thus become negative, with the result that this core pin is also impulsbeaufschlagbar. In order to prevent an opening of the lock cylinder with this method, at least one core pin lying in a normal deep core hole is configured so long in the design of the secrecy of secrecy that it crosses the parting line when using such a less deeply incised striking key.

The location of the inserted in the shortened core hole core pin is thus critical in terms of Aufsperrsicherheit with the Schlagschlüsselmethode. Since the center line of the core bore usually passes through the keyway, the core pins are supported differently than in the keyway DE 102 007 019 714 shown, not with the tip of a rib from but with a flank portion of the tip at one edge of the wall of the keyway, which may correspond to the edge of a rib. Only when the head cross-sectional contour of the core bore-making drill coincides with the head cross-sectional contour of the core pin inserted therein corresponds to the drilling depth of the position of the tip of the core pin.

The invention is therefore based on the object to provide a method for determining the drilling depth for shortened core holes, in which the core pin also assumes its intended position when the Head cross-sectional contour of the drill deviates from the head cross-sectional contour of the core pin.

The object is achieved by the invention specified in the claims, each claim represents an independent solution to the problem and can be combined with any other claim.

First and foremost, it is proposed that, graphically or using an electronic data processing system, the head cross-sectional contour of the core pin is electronically projected into a cross-sectional plane of the key channel. The cross-sectional plane runs through the center line of the core hole. The head cross-sectional contour of the core pin is placed in the cross-sectional plane of the key channel such that the tip of the head cross-sectional contour of the core pin has the desired distance to the mouth of the core hole. From this projection, an intersection can be derived, which has the contour line of the head cross section of the core pin with the contour line of the cross section of the key channel. It can also be a point of contact. The point of intersection of the contour of the head cross section of the core pin with the contour line of the cross section of the keyway closest to the tip of the core pin is sought. After this point P is found, the head cross-sectional contour of the drill is projected into the cross-sectional plane of the keyway. This is done such that their tip lies in the center line and whose contour line passes through the same point P. To find this position, the head cross-sectional contour of the drill in axis line to the center line Z can be moved until the contour line intersects the previously determined contact or intersection. The then found location of the tip of the head cross-sectional contour of the drill defines the drilling depth at which the shortened core hole must be performed so that the core pin inserted therein has its predetermined position. In the production of the lock cylinder core the latter is first brought to the outer contour, in particular with a machining process. Thereafter, the core holes, which extend sch sch substantially radially to the axis of rotation of the cylinder core, drilled. At least one of these core holes is shortened. Thereafter, the keyway is made with a broaching tool. Finally, a deburring can be done. With the method according to the invention, it is possible to manufacture the shortened core bore in a lock cylinder so precisely that the latter lays in the predetermined position even without tip support of the core post, since the drilling depth deviates from the penetration depth of the core post into the shortened core post bore. Again, it may be provided that at less deeply notched notches of the striking key at least a normal core pin crosses the dividing plane between the cylinder core and bore with inserted impact wrench. If S is the distance of the position of the tip of the core pin inserted in the shortened core hole to the mouth of the core pin hole, D is the diameter of the cylinder core, T is the distance of a flank ridge of two adjacent cuts in a percussion key from the rear side, L is the length of a longest core pin, which lies in a non-shortened core hole and E the distance of an incision apex, ie the notch depth from the back of the key, the following inequality pair results: $$\mathrm{S}\mathrm{<}\mathrm{D}\mathrm{-}\mathrm{T\; or\; L}\mathrm{>}\mathrm{D}\mathrm{-}\mathrm{e}\mathrm{,}$$

This must apply, so that a beater key in which all notches incisions are cut in the same way either not impulsimpuls at least one core pin or so that at least one core pin is controlled by the impact key in a position crossing the parting plane. For determining the desired distance S of the tip of a pin inserted in a shortened core hole, the following method can be used. One determines the longest core pin and the shortest core pin of the respective closure. You select the core hole, in which the shortest core pin rests in order to drill this shortened. Determine the desired tip distance S from the mouth of the core hole according to the formula S <L + E - T.

Fig. 1

die Frontalansicht auf einen Schließzylinder,

Fig. 2

einen Schnitt gemäß der Linie II-II durch einen mit Stiftzuhaltungen bestückten, in einer Kernbohrung einliegenden Zylinderkern bei nicht eingestecktem Schlüssel,

Fig. 3

eine Darstellung gemäß Figur 2 mit eingestecktem Schlagschlüssel,

Fig. 4

eine vergrößerte Darstellung gemäß Ausschnitt IV in Figur 3,

Fig. 5

einen Schnitt gemäß der Linie V-V in Figur 3,

Fig. 6

einen Schnitt gemäß der Linie VI-VI in Figur 3,

Fig. 7

eine schematische Darstellung zur Beschreibung des Verfahrens zur Ermittlung der Bohrtiefe B,

Fig. 8

eine stark vergrößerte Darstellung ähnlich Figur 7 bei einem andersprofilierten Schlüsselkanal,

Fig. 9

eine Darstellung gemäß Figur 8 bei einem noch anders profilierten Schlüsselkanal,

Fig. 10

eine Darstellung gemäß Figur 8 bei einem weiter anders profilierten Schlüsselkanal,

Fig. 11

eine stark vergrößerte Darstellung der Figur 5.

Embodiments of the invention are explained below with reference to accompanying drawings. Show it:

Fig. 1

the frontal view of a lock cylinder,

Fig. 2

a section along the line II-II through a pin tumblers equipped, in a core hole inlaid cylinder core with not key inserted,

Fig. 3

a representation according to FIG. 2 with inserted impact key,

Fig. 4

an enlarged view according to section IV in FIG. 3 .

Fig. 5

a section along the line VV in FIG. 3 .

Fig. 6

a section along the line VI-VI in FIG. 3 .

Fig. 7

a schematic representation for the description of the method for determining the drilling depth B,

Fig. 8

a much enlarged view similar FIG. 7 in a different profiled key channel,

Fig. 9

a representation according to FIG. 8 in a still differently profiled key channel,

Fig. 10

a representation according to FIG. 8 in a further differently profiled key channel,

Fig. 11

a greatly enlarged view of the FIG. 5 ,

The lock cylinder shown in the drawings has a lock cylinder housing 1, which has two mutually aligned core holes. This closing member 14 is drehgekuppelt means of a coupling, not shown, with one of the two core holes inserting cylinder 2, provided that the matching key is inserted into the keyway 3 of the cylinder core 2 in an incision between the two core holes. The coupling can be done with the key tip.

The cylinder core 2 has in the drawings a total of four substantially in the radial direction to its axis of rotation extending core holes 4 with a maximum depth hole depth. It is also possible to provide more than four such core bores 4. In addition to these normally deeply drilled core holes 4 at least one core pin hole 6 is provided, whose depth is shortened.

In this core pin hole is a correspondingly shorter core pin 7. In the adjacent normal deep-cut Kernstiftbohrungen 4 is in each case a core pin 5 a. The length of the core pins 5, 7 defines the key secret. For each core pin 5, 7, there is a corresponding housing pin 11, which rests in a housing pin bore 13 and is acted upon by a pin spring 12 in the direction of the cylinder core 2. If the key is not inserted (cf. FIG. 2 ), the housing pins 13 intersect the fulcrum between the cylinder core 2 and housing bore.

Only when a matching key is inserted, which is not shown in the drawings, the parting plane between the core pins 5, 7 and the associated housing pins 11 in the parting line, so that the cylinder core 2 can be rotated in the housing bore.

The FIG. 3 shows a key inserted into the key channel 3 key 15. The notches 16 have there the lowest level. In the FIGS. 4 and 11 is the letter E, the incision depth as the distance between the vertex of the notch incision 16 and key back 15 'of the striking key designated. The ridge lines 17 of the inclined edges of adjacent notches 16 protrude minimally into the keyway in the direction of the mouth 6 '''of the core holes 4, 6. In the FIG. 4 is denoted by the letter T, the distance between the ridge line 17 of two adjacent flanks of the key back 15. From the FIG. 1 It can be seen that the tip 7 "of the core pin 7 resting in the shortened core bore 6 is supported on a profile rib 10. The tip 6" has, as in FIG FIG. 4 shown, a distance A to the ridge line 17 of the striking key 15. Is the according to FIG. 3 in the key channel 3 plug percussion key applied a stroke, so is transmitted via the inclined surface investment of the inclined flanks of the notches 16, an impulse to the tips of the core pins 5, with the result that the housing pins 11 remove from the core pins and thereby completely in their assigned Caseback holes 13 are driven. Because of the distance A, no pulse is transmitted to the core pin 7. The FIG. 7 shows in an enlarged view the investment of the Kernstiftenpitzen 7 "on a tread rib 10. In this constellation, the drilling depth does not correspond to the penetration depth of the core pin 7 in the core pin hole. 6

Typically, tip angles of core pin 7 and drills deviate from each other. The angle α of the core pin tip, ie the angle at which the contour lines of the head cross-sectional contour 9 of the core pin 7 in the core pin tip 7 " meet, is usually smaller than the angle β of the head cross-sectional contour 9 of the bore. The angle α can be in the range between 90 ° and 110 °. The angle β is usually 120 °. So if the constructed core tip 7 "in the free space of the key channel 3, so the core pin 7 is not supported with its tip 7" on the material, for example on a rib 10 from. Rather, the tip region of the core pin 7 is supported in the flank region of the tip, ie in the region of the flank line 7 'on a wall section 3' of the key channel 3. If a drill is used whose head cross-sectional contour 8 has a larger opening angle β than the opening angle α of the head cross-sectional contour 9 of the core pin 7, this results in such a constellation that the position of the tip 7 "of the core pin 7, as in FIG. 7 is shown deeper in the core pin hole 6 than the tip 6 ", which determines the drilling depth B.

Thus, there is the problem of predicting the drilling depth B so that the core pin 7 inserted in the core bore 6 has with its tip 7 "the desired distance S to the mouth 6 '" of the shortened core bore 6.

In order to determine the drilling depth B, a method based on a graphical projection is used, which is preferably carried out in an electronic data processing system. First, the head cross-sectional contour 9 of the core pin 7 is projected in a plane defined by the center line Z of the core hole 6 cross-sectional plane of the keyway 3, that the tip 7 "has the desired distance S to the mouth 6 'of the core bore 6. This distance can for lock cylinder cores 2 a However, the key channels 3 of the lock cylinder cores 2 of a series and in particular a locking system differ in terms of their rib structure, since the profile ribs 10 are used for varying the secrecy of secrecy where the keyway 3 a tread rib 10th has a corresponding groove. Since key channels 3 of different lock cylinders of a locking system have a different profile rib arrangement, it is not ensured that the tip 6 "of the core bore 6 lies in the region of a rib Peak contour of the core pin 7. In order to find this point, the head cross-sectional contour 9 of the core pin 7 is projected in the manner described above in the cross-sectional plane of the key channel 3. Subsequently, a point of intersection P is sought on which the contour line 9 'of the head cross-section 9 of the cross-section At the heart 7, the contour line 3 'of the cross-section of the keyway 3 intersects or touches, looking for the point of intersection or contact P closest to the tip 7 "of the core pin 7.

In a subsequent step, the head cross-sectional contour 8 is projected in the cross-sectional plane such that the tip 6 "lies in the center line Z of the core hole 6. The points 6" and 7 "thus lie on the same center line Z. Since the point P by the previous Determined construction step, now the axial position of the top point 6 "of the head cross-sectional contour 8 of the drill along the center line Z must be moved so far that the contour line 8 'of the head cross-sectional contour 8 of the drill also passes through the point P. The point P is then the support point at which the cone-shaped tip structure or the rounded tip contour of the core pin 7 is supported on a projection of the keyway 3, in particular a wall section 3 'of the keyway or a section of a profile rib 10. As a result, the drilling depth B has been determined.

The FIGS. 8 to 10 show that the method is applicable to differently profiled key channels 3, wherein each time the position of the tip point 7 "of the core pin from the position of the tip point 6" of the bore or the penetration depth B of the drill deviates. At the in FIG. 8 illustrated embodiment a portion of the conical tip portion of the core pin 7 is supported on a tread rib 10.

In the in the FIG. 9 illustrated embodiment is located on the left side of the key channel 3, a first support point P and on the right side of the key channel 3, a second support point P '. Again, the top point is 6 "of the hole in the free space of the key channel. 3

Also in the in the FIG. 10 In the example shown, there are two support points P, P 'in the cross-sectional plane of the cylinder core 2, which are each assigned to one side of the 3' of the key channel 3.

The diameter D of the cylinder core 2 is in the FIG. 11 denoted by D. In order to ensure the greatest possible safety, the following inequality pair should be taken into account when creating the lock cylinder: S <D - T or L> = D - E, where L is the length dimension of a normal core pin 5, as described in US Pat FIG. 11 is shown. As long as the first inequality is fulfilled, it is ensured that the ridge line 17 has a distance A from the tip 7 "of the core pin 7. This core pin 7, which is inserted in a shortened core bore 6, is thus replaced by a beating key in which the ridge lines 17 are dimensioned Thus, the housing pin belonging to the core pin 7 can not be moved in a percussion key opening method with such a percussion key 15. The second inequality should be satisfied for the case where the distance T from the ridge line 17 to Key back 15 'is so large that a distance A is not present, so such impact key 15 can transmit a pulse to the core pin 7. The second inequality ensures that even a small displacement of the normal core pin 5 with the length L to an entry of this core pin 5 leads into the housing bore, so that here a blocking effect occurs.

The method for determining the drilling depth B for the shortened core bore 6 is preceded by a determination of the position of the tip 7 "of the core pin, ie a determination of the dimension S, from which the drilling depth B is then determined by means of the method described above be chosen so that by the measure T from the spine 15 'spaced ridge line 17 has a distance A from the top 7 "has. If this is no longer the case, the sum of the distance of the notched crown to the key back 15 ', ie the dimension E with the measure of the length L of the core pin 5 inserted in this core hole, must be greater than the diameter D of the cylinder core 2.

Cylinder cores are equipped with differently long core pins, since the length of the core pins and their arrangement determine the key secret. In a further development of the method is therefore provided that first the length L of the longest core pin and the length of the shortest core pin is determined. The shortened core bore is then assigned to the shortest core pin and the dimension S, which means the desired distance of the tip 7 "of the core pin 7 to the mouth 6 '" of the core bore 6, is determined according to the following formula: S <= L + E - T and Subsequently, the core holes 4, 6 are drilled, wherein the shortest Kenstift 7 associated hole 6 receives a drilling depth B, which is derived in particular according to claim 1 from the desired distance S.

S should preferably be at least by the amount of a step jump, ie 0.5 mm smaller than L + E - T, so that the longest normal core pin with at least 0.5 mm crosses the parting plane with a suitably low incised impact wrench. The difference T - E, that on the center line projected distance of the serrations 16 from the ridge lines 17, can be calculated using the following formula: $$\mathrm{T}\mathrm{-}\mathrm{e}\mathrm{=}\mathrm{C}\mathrm{/}\left(\mathrm{2}\mathrm{\cdot }\tan \left(\mathrm{\gamma }\mathrm{/}\mathrm{2}\right)\right)$$

C here denotes the distance, measured in the direction of extent, of two adjacent core vertices. This distance corresponds to the distance between two adjacent core holes. The angle γ designates the flank angle of the two notched flanks which meet in a vertex 16 (cf. FIG. 4 ). This angle is between 90 ° and 120 °. In this respect, by specifying a minimum value for the angle γ, the maximum possible value of the distance T - E can be determined without having to know the impact key.

All disclosed features are essential to the invention. The disclosure of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application.

Claims (8)

Method for determining the drilling depth (B) for a shortened core bore (6) which is to be introduced into a cylinder core (2) of a lock cylinder, wherein the finished cylinder core (2) has a key channel (3) optionally forming a profile rib (19) and in the shortened core bore (6) is a tip (7 ") with an adjoining, in particular conical or rounded head surface (7) exhibiting core pin (7) rests, wherein at a not inserted into the keyway (3) matching key or a in the key channel (3) inserted impact wrench (15) the tip (7 ") of the core pin (7) as a result of an abutment of the head surface (7 ') at least one contact point (P) of the wall (3') of the key channel (3) a distance (S) to the mouth (6 ''') of the shortened core bore (6) and a drill is used, the head cross-sectional contour (8) has a larger opening angle (β), as the Öffnungswin angle (α) of the head cross-sectional contour (9) of the core pin (7), characterized by the following steps: Projecting the head cross-sectional contour (9) of the core pin (7) into a cross-sectional plane of the keyway (3) through the center line (Z) of the core hole (6) such that the tip (7 ") of the projection of the core pin (7) provides the desired Distance (S) to the mouth (6 ''') of the core bore (6) has; Finding the point (7 ") of the projection of the core pin (7) nearest intersection or point of contact (P) of the contour line (9 ') of the head cross section (9) of the core pin (7) with the contour line (3') of the cross section of Key channel (3); Projecting the head cross-sectional contour (8) of the drill into the cross-sectional plane such that its tip (6 ") lies in the center line (Z) and its contour line (8 ') runs through the point (P). Method for drilling a shortened core bore (6) into the cylinder core (2) of a lock cylinder, characterized by a determination of the drilling depth (B) according to claim 1 and subsequent drilling of the core bore (6). Method according to one or more of the preceding claims or in particular according thereto, characterized in that after the cylinder core (2) has been brought into shape in particular by a machining first a plurality of substantially radially to the center of rotation of the cylinder core (2) extending Core holes (6, 4) are introduced, wherein at least one shortened bore is made according to claim 2 and then the keyway (3) is made in particular by broaching. A method according to claim 3 or in particular, characterized in that prior to drilling the core bores (6, 4) of the keyway (3) is made in particular by broaching. Method according to one or more of the preceding claims or in particular according thereto, characterized in that the depth (B) of the shortened core bore (6) is selected such that the tip (7 ") of the core pin (7") inserted in the shortened core bore (6) ) has a distance (A) to the ridge line (17) of two inclined flanks of adjacent notch incisions (16) of a striking key (15) inserted in the key channel (3). Method according to one or more of the preceding claims or in particular according thereto, characterized in that either the distance (S) of the tip (7 ") of the core pin (7) in the shortened core bore (6) to the mouth (6 ''') of Core bore (6) is less than the difference between the diameter (D) of the cylinder core (2) and the distance (T) of a Flankenforstlinie (17) from the key back (15 ') or that the length (L) of another core pin (4) is greater than the difference of the diameter (D) of the cylinder core (2) and the distance (E) of the apex line (16) of the associated notch recess to the key back (15 ') of a striking key (15). Method for drilling the core bores (4, 6) into a cylinder core (2) of a lock cylinder, wherein first the length (L) of the longest core pin (5) and the position of the shortest core pin (7) are determined, the desired distance (S) the peak (7 ") of the shortest core pin (7) is determined according to the following formula: S <= L + E - T, where (T - E) the distance of the apex lines projected onto the center line (Z) of the core hole (6) 16) of the notched flanks of the ridge lines (17) of the notched flanks of two adjacent cuts of a striking key (15) whose notch cutting lines (16) lie substantially at a common level, and then the core holes (4, 6) are drilled, the shortest core pin (7) associated bore (6) until a drilling depth (B) takes place, which is determined taking into account the diversity of the head cross-sectional contour (9) of the core pin (7) of the head cross-sectional contour (8) of the drill. A method according to claim 7, characterized in that the drilling depth (B) is determined by the method according to claim 1.

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