WO1989007697A1

WO1989007697A1 - Cylinder lock

Info

Publication number: WO1989007697A1
Application number: PCT/DE1989/000071
Authority: WO
Inventors: Gernot Richter
Original assignee: Gernot Richter
Priority date: 1988-02-09
Filing date: 1989-02-06
Publication date: 1989-08-24
Also published as: EP0353277B1; EP0353277A1; ATE112813T1; DE58908491D1

Abstract

A cylinder lock comprises a cylinder housing (10) and a cylinder core (50). It is known that, to date, the cylinder housing is made exclusively of brass. According to the invention, the cylinder housing is made of a corrosion-resistant, robust, high-strength, very hard metal or metal alloy. In a particularly preferred embodiment, the cylinder housing is of two-part construction.

Description

CYLINDER LOCK

The invention relates to a cylinder lock according to the features of the preamble of claim 1.

To date, the cylinder housings for a cylinder lock are made exclusively from brass, because brass is an easy-to-work material. One first produces a blank as a blank, which has a first section with a cylindrical outer contour and a second section which is formed radially on the outer circumference of the cylindrical section and has a cuboid outer contour with two parallel side walls which have a semicircular contour are connected to one another on the side or edge of the second section opposite the cylindrical first section.

This profile is a solid, one-piece housing profile and is produced using the drawing process. To form the actual cylinder housing, the first section has a cylindrical longitudinal bore and the second section has transverse bores; The cylinder core is inserted into the longitudinal bore and tumbler pins into the transverse bore. Cylinder housings which do not have a second section are also known. Since brass is currently the only material used in all cylinder housings, the production of the longitudinal bore using a normal brass drill is very simple and inexpensive.

This used in all locks currently manufactured Brass material is relatively easy to break open, so that the resistance time value is low. This resistance time value corresponds to the time it takes to break the lock open.

The object of the invention is therefore to provide a cylinder housing of the type mentioned, which is made of a material which is considerably more difficult to machine than brass.

This object is achieved according to the invention by the characterizing features of claim 1.

This material, which is to be used for the cylinder housing according to the invention, has not previously been used because its workability was considered too difficult over time.

A particular advantage of the invention is that the resistance time value is increased or lengthened considerably. The resistance time value for brass is less than 2 minutes, whereas it is increased several times for the material according to the invention. In the case of brass, drill protection pins and tear-off clips are also required, which, which is particularly advantageous, can be omitted in the material according to the invention.

The cylinder housing and in particular the metal or the metal alloy can be produced in any way. For example, the blank from which the cylinder housing is made can be cast, forged, or sintered in the powder metallurgy process as set out in claim 2. The properties of the material are essential: it should be corrosion-free, with high toughness, high strength and great hardness. If the cylinder housing of the cylinder lock is designed as shown in features 5 to 10, then the cylinder housing should also be weldable or brazeable; this is preferably a steel or a steel alloy which is also stainless and hardenable i st.

If the cylinder housing is designed as shown in the features of claim 5, then significant simplifications are made in the manufacture of the cylinder housing, in particular in the manufacture of the bore. Due to the fact that the two profile parts, i.e. the two housing sections, form the longitudinal bore from the outset or complement each other to form the longitudinal bore, it is no longer necessary to drill the cylinder housing, but only to process it with a so-called broach, to possibly insert it into the welding process Remove internal metal particles. Even if the inside diameter of the raw part from the two housing sections is slightly smaller than the required inside diameter, drilling out the longitudinal hole that is present from the outset is considerably simplified and does not require any major changes to the tools or machine tools currently installed.

It is known from US Pat. No. 2,977,786 to manufacture the cylinder housing from two parts; on the one hand, nothing is said about the choice of material there, and on the other hand, the division into two is based on the fact that the pin tumblers can be subsequently changed. Therefore, the two parts are only releasably but not permanently connected.

From DE-OS 31 34471 it is also known per se to manufacture the cylinder housing in several parts. Nothing else is proposed as a material apart from plastic. The fact that plastic can be used is due in particular to the very solid shape of the housing parts, which are also held together by an all-encompassing jacket.

The two parts are preferably designed as described in claims 7 to 11, the longitudinal steps being particularly advantageous since they improve the assignment of the two Parts serve to each other when putting the two together. In addition, the longitudinal steps act as labyrinthine seals, so that molten welding or soldering material is prevented from flowing into the interior of the longitudinal bore.

In the same way as the cylinder housing, in order to achieve a resistance time value corresponding to the cylinder housing according to the invention, the cylinder core is also produced from the same material as the cylinder housing. Since the locking channel is manufactured according to claim 14 with the machining methods specified there, the manufacture of the entire cylinder lock is considerably simplified.

In order to prevent seizure when the cylinder core is frequently rotated in the housing, the cylinder core according to claim 15 is preferably coated with a lubricant. This lubricant can be an antel-like plastic splint or a kind of lubricant layer; the latter sits in the valleys of the processing grooves as a supply and is gradually pushed out of these valleys when the cylinder core is turned.

Because steel or another material that is difficult to machine can be used, the so-called resistance time value, i.e. the time it takes to open the lock, is considerably enlarged or lengthened compared to the brass cylinder housing, which considerably increases Security improvements for the locks result.

The invention and further refinements and improvements of the invention and further advantages are to be explained and described in more detail with reference to the drawing, in which some exemplary embodiments of the invention are shown.

Show it: 1 is a plan view of a blank,

2 shows a sectional view through a second embodiment of a cylinder housing according to the invention, and

3 is a partial sectional view of a further embodiment in the area of the weld seam for the cylinder housing,

4 is a partial sectional view similar to that of FIG. 3 of a further embodiment of the cylinder housing,

Fig. 5 is a plan view of a cylinder core and

6 is a sectional view through the cylinder core along the section line VI-VI of FIG. 5th

In Fig. 1, a blank for a cylinder housing is shown, which is made of a high-strength, high-strength steel alloy. The blank has a first housing section 10, into which, as shown in dashed lines, a longitudinal bore 10a or cylinder bore 10a is made, which, particularly in the case of steel or a similar hardenable and high-viscosity material, has not hitherto been able to be produced using the currently known and used machines. Because of these problems, all lock manufacturers have switched to brass, which is easy to work but also easy to break open. Connected to the first housing section 10 is a second housing section 11, which has a cuboid cross section with side walls 12 and 13 on both sides, which are connected by means of a round contour 14. According to the invention, this cylinder housing is made of a tough, high-strength and hardenable material, preferably of stainless steel.

' The Zylindergehäusε gem. FIG. 2 has a cylindrical housing section 20 which corresponds to section 10. This cylinder section 20 has a longitudinal bore 21, and radially to this, the second housing section 22 is formed, which has two parallel side walls 23 and 24, which are connected to one another by means of an arcuate section 25 or an arcuate contour 25. The first housing section 20 comprises an upper half-shell 26, and on the second housing section 22 two projections 27 and 28 are formed on both sides, which protrude on both sides of the two side walls 23 and 24 and thus form a lower shell 29, which of the upper shell 26 such is covered that the two free edge edges 30 of the upper shell and the free edge edges 31 of the lower shell 29 are directed towards each other. The two shells 26 and 29 complement each other to form the cylindrical housing section 20, and the inner surfaces of the two shells 26 and 29 form the longitudinal bore or limit the longitudinal bore 21.

3 shows a part of the upper shell 26 and the extension 27; the mutually facing edges 30 and 31 are beveled and in this way form a mouth that is open to the outside, the mouth angle alpha being an acute angle. A weld seam 33 is placed in this mouth 30/31, for example by means of a laser welding process or by means of an electron beam welding process. Of course, all other types of welding processes can also be used, provided this prevents the first housing section 20 from being warped too much.

It can be seen in FIG. 3 that a nose 34 formed by the weld seam material projects into the interior of the bore 21. This nose 34 is then removed, as well as further unevenness on the inside of the shells 26 and 29, by means of machining, preferably with a simple broaching needle.

The upper shell 26 and the section 22 with the projections 27 and 28 are each made as a drawn profile, the material preferably being stainless steel.

4 shows the two shells 40 and 41, which correspond to shells 26 and 27. In the region of the edges 42, 43 each have a bevel 44 and 45 corresponding to the bevels 30 and 31 and a recess 46 and a projection 47, respectively, which fit into one another and serve to guide the upper shell 40 relative to the lower shell 41. In addition, the recess and the projection have a sealing effect when welding or soldering, so that tabs corresponding to tab 34 and thus post-processing and the longitudinal bore inner surface are avoided.

5 shows a plan view of a locking or cylinder core 50 which has a key cut (locking channel) 51 which runs lengthwise through the entire locking core.

The closing core has at its forward end protruding from the cylinder housing 52 a radial flange 53, which rests as a stop against a recess 54 on the cylinder housing, which deepens the longitudinal or core receiving bore 55 at its end. In the cylinder core 50 and in the cylinder housing 52 there are transverse bores 56 for receiving locking pins (not shown). At the end of the locking core opposite the rim 53, a locking bit 57 is formed, which can be pivoted with the locking core by means of a key (not shown).

The closing core 50 of a known design has drilling pins 58 and 59 (shown in broken lines) which can be omitted in the design according to the invention.

A sliding layer can be placed around the cylinder core, which is not shown here, which prevents the materials for the cylinder core and the cylinder housing from seizing in its longitudinal bore.

_ ^! For security reasons, as shown in dashed lines in FIG. 6, a security plate 60 can be fitted in front of the lock, which has a bore 61 which only leaves the cylinder core free. This bore can also be adapted to the cylinder housing contour, so that this remains, which has the disadvantage that the cylinder housing remains accessible.

The material from which both the cylinder core and the cylinder housing are made is a high-strength, high-viscosity, corrosion-free and hardenable material, preferably steel or a steel alloy, which can be manufactured in various ways. Thus, both the cylinder core and the cylinder housing can be manufactured by drawing, forging, casting, or also by sintering. If the cylinder housing is made of two parts, as shown in FIGS. 2 to 4, then it is of course necessary that the material is also weldable or hard-solderable or extremely temperature-solderable.

As shown in FIGS. 1 to 4, the cylinder housing can have the second housing section; there is of course also the possibility that the invention is applied to a cylindrical cylinder housing without the second housing part 11, 22.

Claims

PATENT CLAIMS

1. Cylinder lock for _. Door locks, with a cylinder housing and with a cylinder, with pin tumblers, with εinεm cylindrical, with a longitudinal bore first housing section into which the cylinder core can be inserted, and optionally with a second housing section projecting radially from the first housing section, in the transverse bores for receiving the Pins for the pin tumbler can be brought in, characterized in that the cylinder housing and the cylinder core are made of corrosion-free metal or such a metal which is endowed with high toughness, strength and great hardness or such a metal alloy.

2. Cylinder lock according to claim 1, characterized in that the cylinder housing and, where appropriate, the cylinder cores are cast, drawn, forged or produced by a powder metallurgical sintering process.

3. Cylinder lock according to claim 1 or 2, characterized in that the metal or the metal alloy is a steel or a steel alloy, which is weldable or can be soldered at a high temperature.

4. Cylinder lock according to one of claims 2 and 3, characterized in that the steel or the steel alloy is rustproof and hardenable.

P *. • * ^* "* _/ « »- = -.» »-» •. - _ ___

5. Cylinder lock according to εinεm of the previous claims, characterized by the fact that the cylinder housing in the area of the first housing section (20) is divided in its longitudinal direction, the divisional level in the presence of the second housing section (22) approximately along the center line of the radial direction Longitudinal bore (21) runs so that two shells are formed, which together form the longitudinal bore space, and that the lower and upper shell are firmly connected to each other on the longitudinal edges to be mutually facing.

6. Cylinder lock according to claim 5, with the second housing section (22), characterized in that the second housing section (22) is connected to the lower half-cylindrical shell (29) which forms the longitudinal bore space with the upper, also semi-cylindrical shell (26) on the second housing section (22).

7. Zylindergεhäusε according to claim 6, characterized gεkεnnzεichnet that protruding projections (27,28) are formed on the second housing section (22) on both sides diε bεiden side walls (23,24), which form the lower shell.

8. Cylinder lock according to one of claims 5 to 7, characterized in that the top and bottom shells, together with the second housing section (22) with the two projections (27, 28), are drawn as a pulled part profile.

9. Cylinder lock according to one of claims 5 to 8, characterized by the fact that the edges (31, 30), facing each other, and bottom shells (26, 29) have a chamfer so that the edges (3, 30) 31) enclose an acute angle (Cf) open to the outside.

10. Cylinder lock according to claims 5 to 9, characterized in that in the area of the edges of the shells and the second shell section facing each other, a longitudinal gradation Adjustment is provided.

11. Cylinder housing according to one of the preceding claims, characterized in that the lower and the upper shell are firmly connected to one another by means of a welded connection or else high-temperature soldering on their mutually directed longitudinal edges (30, 31).

12. Cylinder lock according to claim 11, characterized in that the welding process is preferably εin laser, electron or other welding processes.

13. Cylinder lock according to at least one of the preceding claims, characterized in that the longitudinal bore (21) can be machined after assembly by means of a tool, preferably a reaming needle.

14. Cylinder lock according to one of the preceding claims, in which the cylinder has a key channel and bores for the pins, characterized in that the key channel by means of e.g. Spark erosion or similar processes can be introduced into the cylinder core

^' is.

15. Cylinder lock according to claim 14, characterized in that preferably the cylindrical surface of the cylinder core is coated with a sliding layer.

16. Cylinder lock, in particular with a cylinder housing and a cylinder cylinder according to claims 14 and 15, characterized in that when the cylinder core is inserted into a cylinder housing made of brass or similar material, a security fitting is fastened in front of the cylinder lock, which at least leaves the cylinder cylinder free.

REPLACEMENT LEAF