In the art are known numerous embodiments of lock device cylinders widely used for lock devices of door leafs, i. e. leafs of doors and windows. In many cases are used mechanical lock device cylinders corresponding for instance to DIN 18 252 and which are fixed in the lock device casing of a lock device. Such lock device cylinders of door leafs include a cylinder housing comprising at least one cylinder barrel. The rotatably supported cylinder barrel may be displaced by means of a key inserted into a closing passage of the cylinder barrel for operating a catch bolt projecting from the inside of the lock device casing into the cylinder casing. Subsequently, the lock device is locked or unlocked.

During the assembly of the lock device the lock device cylinder is inserted from the outside into the lock device casing arranged approximately near a door leaf

and screwed into the latter. For that purpose the cylinder housing comprises a screw thread provided in a housing web projecting in the parallel direction of the lock device cylinder. Said screw thread extends vertically to the parallel direction of the direction of the thickness of the door leaf in such a manner that a screw engaging the thread may be inserted from the lock plate which is not accessible when the door is closed.

In particular in case of doors constructed as lock-type door or window leafs the lock device is often provided near the bottom face of the door leaf or window leaf, respectively, for obtaining a locking with a striking plate provided at the bottom face. If in such a case the bore of the thread is located on the lower front face of the door leaf extending toward the bottom face the lock device cylinder may be fixed by inserting the screw into the thread only when the lock device has been previously disassembled or the door leaf has been unhinged.

Nevertheless, in common practice lock device cylinders are mounted in many cases only after mounting the door leaf comprising already the lock device and in some cases they have to be subsequently replaced. Since in such cases either the lock device or the door have to be dismantled, the necessary handling is rather unsatisfactory.

The present invention solves the given object to provide a device for locking door leafs, especially leafs of an all-glass door, by means of which it is possible to obtain in a simple manner the practical assembly of the lock device cylinder which is substantially independent from the mounting position of the lock device.

According to the present invention the device presenting the above mentioned features the lock device casing includes a blocking member comprising a blocking member operated by at least one operation member, wherein for fixing the lock device cylinder in the lock device casing said blocking member is positively movable by means of the operation member in the threading of the housing web, and wherein the operation member is accessible from the outside, which laterally extends from the side wall of the lock device.

Such a device is based on the finding that the practical assembly of the lock device cylinder may be obtained independently from the mounting position of the lock device when a blocking member is located in such a manner in the lock device casing that an operation member by means of which a blocking member for positive locking of the lock device cylinder in the lock device casing may be operated, is laterally accessible from the outside of the lock device. In fact, if the outer face is located on the easily accessible front side or rear side of a door leaf it will also be possible in case of a mounted door leaf to easily operate the blocking member and therefore a practical fixing of the lock device cylinder in the lock device is possible even in those cases in which the lock device is provided near the bottom face of the door leaf and when the catch bolt of the lock device cooperates with an edge plate of a door or window provided in the bottom face as this is often the case for all-glass doors.

Additionally the arrangement of the blocking member and the operation member permits cinematic decoupling of the fixing operation of the lock device cylinder. Contrary to the state of the art disclosing for instance a lock plate screw exclusively provided in a single fixing direction, it is therefore possible to provide in a simple manner different direction angles for the blocking member

and the operation member. Thus may for instance be obtained the advantage that the blocking member and the operation member each may be moved in a rectangular direction thus ensuring an economic production and assembly.

It is of particular advantage when the blocking member is arranged laterally near the housing web of the cylinder casing near the lock device casing. Thus it is possible in a simple manner to arrange the blocking member opposite the opening of the bore of the housing web and to directly introduce said member into the latter.

Additionally, an advantageous embodiment of the inventive device may also be obtained when the cylinder casing receives at least one cylinder barrel including a closing passage opening at the free front face of the lock device cylinder permitting to insert a key, and wherein the operation member is accessible from the outer face of the side wall of the lock device in the area in which extends the free front face of the cylinder barrel. Since the free front face of the lock device cylinder is usually provided on the easily accessible front or rear side of a door leaf, easy operation of the blocking member by means of the operation member becomes possible.

Preferably the blocking member includes a first passage guiding the blocking member and a second passage guiding the operation member, wherein said first passage and said second passage extend in a preferably vertical angle to each other. Thus it is possible to obtain a simple constructive embodiment taking into account the fact that the opening of the bore of the housing web into which the blocking member is positively inserted and which is arranged approximately in the area of the outer face extending from the front face of the

cylinder barrel of the side wall of the lock device have the form of intersecting bores generally arranged in vertically planes. Moreover, in this context is has been found to be of advantage to form the first and the second passages in the form of intersecting bores in order to ensure a relatively simple production process. The embodiment of independent left hand or right hand hinged door leafs is only obtained when the second passage is preferably constructed as connecting passage.

Preferably the blocking member is constructed as separate component inserted into the lock device casing so that conventional locks may be reconfigured without considerable effort compared to the inventive device. Moreover, it is of particular advantage when the blocking member is constructed in the form of an essentially cubic block provided in the area of the opening of the second passage with a preferably cylindrical collar, wherein said cylindrical collar positively engages the opening of a side wall of the lock device casing. Such an embodiment permits to arrange the blocking member in a simple constructive manner in the lock device casing.

Alternatively, the blocking member may be constructed integral with the lock device casing. Though such an alternative embodiment requires at least the exchange of a corresponding part of the lock device casing, such as for instance a side wall, it nevertheless reduces the number of necessary components and therefore enhances a relatively simple assembly. On the other hand, it may also be useful to construct the blocking member in the form of several components, and preferably two components. Though by this embodiment the number of necessary components is increased, it nevertheless simplifies the assembly of the blocking member and the operation member.

Additionally, as further embodiment of the present invention it is also suggested to construct the blocking member in the form of a ball. The spherical embodiment of the blocking member provides a continuous working surface for the operation member engaging the blocking member, thus permitting various constructions of the operation member and therefore a variable adaptation to various circumstances. In order to obtain secure fixing of the ball- type blocking member in the first passage of a blocking member constructed in the form of a cubical block, the first passage has at least at one end thereof a smaller diameter than the blocking member. Therefore, the first passage may for instance have at its end facing the bore of the housing web or even at both ends thereof the smaller diameter. In the latter case it will be preferred to use for instance a two-part construction of the blocking member for positioning in a simple manner the ball-type blocking member in the first passage. Due to the spherical embodiment of the blocking member and even in case of a reduced diameter of the first passage at the end facing the bore of the housing web at least one spherical section of the blocking member projects into the bore of the housing web, thus ensuring sufficient positive engagement between the blocking member and the bore of the housing web.

In a preferred embodiment of the present invention the operation member consists of a screw, preferably a stud screw, permitting simple and economic production. In particular when the blocking member has the form of a ball there can be ensured safe transmission of the movement of the operation member onto the blocking member. Moreover, in this context it is also suggested to provide the second passage with a thread in the form of a self lock device preventing a self-starting movement of the operation member and therefore of the blocking member. Preferably the bore of the housing web is provided with a

chamfer for clamping for instance a ball-type blocking member for ensuring thereby in addition to a positive engagement also a frictional connection between the lock device cylinder and the lock device casing.

In a further preferred embodiment of the present invention the blocking member comprises an essentially plate-like blocking member provided with a projection facing the bore of the housing web. This embodiment will be preferred in those cases in which the outer face of a side wall of the lock at which the operation member is accessible, consists of an upper narrow face. In fact, in this case the movement of the operation member as well as of the blocking member extends in the same direction parallel to the bore of the housing web. In that case the blocking member may preferably be moved into openings provided in two opposite side walls of the lock device casing for permitting a specified movement of the blocking member and therefore the safe engagement of the projection in the bore of the housing web. Alternatively, it is also possible to hinge the blocking member in the lock device casing for permitting the engagement of the projection in said bore.

Various details and further advantages of the present invention result from the following description of preferred embodiments of the present invention. The enclosed drawings represent in detail: Fig. 1 shows a diagrammatic view of the inventive device for locking a door; Fig. 2 shows a diagrammatic view of a double profile lock device cylinder;

Fig. 3a shows a perspective view of a conventional lock device for a door arranged at the bottom face of a door leaf; Fig. 3b shows a perspective view according to Fig. 3a of the inventive device for locking a door; Fig. 4a shows a partial view of a first embodiment of the inventive device according to Fig. 3b; Fig. 4b shows a perspective view of the blocking member; and Fig. 5a shows a partial view of a second embodiment of the inventive device.

The device for locking a door shown in fig. 1 includes a lock device 200 provided with a lock device casing 210 and a lock device cylinder 100 inserted from the outside thereof into said lock device casing 210. As can be seen in particular in fig. 2 said lock device cylinder 100 has the form of a mechanical double profile lock device cylinder and comprises a cylinder casing 110 provided with a housing web 111 extending parallel to the lock device cylinder 100. The housing web 111 is arranged vertically to the parallel direction of the cylinder casing 110 with a bore 112 including a chamfer 113. The housing web 111 connects two casing sections 114a, 114b of the cylinder casing 110 separated by a groove 120 tiltably receiving a striking plate 121. The casing sections 114a, 114b each comprise a rotatable cylinder barrel 130 blocked in the parallel direction of the lock device cylinder 100 and comprising a lock passage 132 opening at one of its free front faces 131a, 131b. An inlet groove 133 for facilitating the insertion of a not represented key into the lock passage 132 is

provided at the opening of the lock passage 132 in front faces 131a, 131b. By introducing an appropriate key into the lock passage 132 set screws 140 arranged in the casing section 114a, 114b preventing the movement of the cylinder barrel 130 may be moved into a position in which the rotation of the cylinder barrel 130 is possible. By rotating the cylinder barrel 130 the striking plate 121 is tilted from the cylinder casing 110 for locking or unlocking the lock device 200.

In the representation shown in figs. 2a and 2b the lock device 200 is arranged near the bottom face 300 at the glass leaf 400 of an all-glass door having the form of a stationary door leaf, and comprises at the inside of the lock device casing 310 the above described lock device cylinder 100 as well as a catch 220 shown in fig. 1 and operated by means of the striking plate 121 through a driver 221 and cooperating with a lock plate provided at the bottom face 300 for locking or unlocking the lock device 200.

For the assembly of the lock device cylinder 100 with the lock device 200 the lock device cylinder 100 is introduced from the outside through an opening 211 extending through the lock device casing 210 into the lock device casing 200, wherein the parallel direction of the lock device cylinder 100 corresponds to the direction of the double arrow A represented in figs. 2a and 2b, that is in the direction of the thickness of the door leaf 400. In the assembled state the lock device cylinder 100 is therefore arranged in the lock device casing 210 in such a manner that the front faces 131a, 131b of both cylinder barrels 130 are located in the plane of the lateral sides 231 of the fitting plates 230 receiving the lock device casing 210, and the opening 211 is completely closed by means of the front faces 131a, 131b provided on the outer faces 231. Thus can be avoided that

the lock device cylinder 100 can be grasped for instance by means of pincers or the like and be withdrawn from the lock device casing 210.

In the art it has been usual for fixing the lock device cylinder 100 in the lock device casing 210 to thread a screw 500 from the lock plate of the lock device 200 into the bore 112 of the housing web, as this is shown in fig. 3a. When the lock device 200 is arranged near the bottom face 300 this is unfavourable, since the striking plate, i. e. the wall 212 guiding the lock device casing 210 is arranged on the front face of the door leaf 400 facing the bottom face 300.

On the other hand, the device for locking a door shown in fig. 3b permits the fixing of the lock device cylinder 100 from the front face 131a of the lock device cylinder 100 or the cylinder barrel 130 located at the inside of the door leaf 400.

This is made possible by means of a blocking member 600 represented in detail in figs. 4a and 4b, which according to the representation of fig. 4a is formed as separate component arranged in the lock device casing 210, and which in the alternative embodiment shown in fig. 4b is formed integral with a lateral wall 213 of the lock device casing 210. Contrary to the embodiment shown in figs. 3a and 3b the lock device 200 shown in fig. 4a additionally comprises circular anchor plates 235 mounted on the lateral braces 230, the exterior faces 236 of which are located approximately in the plane of the front faces 131a, 131b of the cylinder barrels 130. Due to the circular anchor plates 235 which can be easily exchanged and fabricated at relatively low cost, it is possible to specify a uniform length of the lock device cylinder 100 for door leafs 400 having a different wall thickness.

In both embodiments shown in figs. 4a and 4b the blocking member 600 formed as a cubic block comprises a first passage 611 and a second passage 621 which each are constructed as connecting passage. The first passage 611 and the second passage 621 are arranged such that they intersect each other at the inside of the blocking member 600. In the embodiment shown in fig. 4a the opposite sides of the blocking member 600 are provided with a collar 622 in the form of a regular cylinder. Said collar 622 in the form of a regular cylinder arranged in the area of the opening of the second passage 621 and elongating said passage extends parallel to the latter positively engages an opening 214 provided in the side wall 213 of the lock device casing 210. This permits to securely hold the blocking member 600 between the side walls 213 in the lock device casing 210.

Moreover, the blocking member 600 is located in the lock device casing 210 in such a manner that said first passage 611 is aligned with the bore 112 of the casing web 111, whereas the second passage 621 extends vertically to the front face 131a of the cylinder barrel 130. Since the bore 112 of the casing web 111 extends normal to the longitudinal direction of the lock device cylinder 100, and the first passage 611 and the second passage 621 are also located normal to each other, it being without importance whether, as represented in figs. 3a and 3b, the lock device 200 is arranged in the horizontal or the vertical position. The first passage 611 rectilinearly guides a ball-type locking element 610, while the second passage 621 provided with an internal screw thread in the form of a self- locking thread receives a screwed-in operation member 620 having the form of a stud, which is screwed-in by means of a hexagon socket screw key inserted from the front face 131a of the cylinder barrel 130, as this can be seen in particular in the embodiment shown in fig. 3b.

At its end arranged opposite to the front face 131a of the cylinder barrel 130 the operation member 620 is chamfered. Consequently, when the operation member 620 contacts the locking element 610 while it is screwed into the second passage, there is caused a wedge effect displacing the ball-type locking element 610 in the first passage 611 causing it to positively engage the bore 112 of the housing web 111. As a consequence thereof, the lock device cylinder 100 is blocked in the lock device casing 210. Moreover, the diameter of the ball-type locking element 610 is dimensioned such that a spherical section abuts the chamfer 113 of the bore 112. Thus is created a clamping force which, in addition to the positive locking creates a frictional connection between the locking element 610 and the closing cylinder 100 thus enabling secure fixing of the closing cylinder 100 in the lock device casing 210.

The second embodiment of a device for locking a door shown in fig. 5 is provided with a blocking member 700 comprising a substantially plate-like locking element 710 as well as two operation members 720 in the form of a screw. The locking element 710 is provided with a projection 711 facing the bore 112 of the housing web 111 and which may be positively secured in the bore 112 by means of the operation members 720. The locking element 710 is movably fixed in the openings 215 of the opposite walls 213 of the lock device casing 210.

For this purpose both ends of the locking element 710 are provided with projections 712 extending through openings 215 into recesses 232 of the brace plates 230. These recesses 232 are engaged by the operation members 720 on the opposite side of the locking element 710 on the projection 711 for moving the latter inside the blocking member casing 210. Alternatively, that is when only one screw is provided as operation member 720, the blocking element 710 may also be tiltably fixed in the lock device casing 210. This is for instance obtained

in a simple manner when one of the two projections 712 of the locking element 710 is mounted on the shoulder of a brace plate 230, whereas the other projection 712 is movably guided in the opening 215. Contrary to the embodiment shown in fig. 4a the operation members 720 are not operable from the front face 131a of the cylinder barrel 130. In fact, the operation members 720 are accessible from the upper outer surface 233 of the brace plates 230 acting as side walls of the brace plates 230 of the lock device 200.

The above described device for locking a door comprising a lock device cylinder 100 and a lock device 200 permits a simple practical assembly of the lock device cylinder 100. Primarily, this is possible due to the arrangement of the locking element 610 and the operation member 620 which, in the embodiment shown in fig. 4a, may be operated from the free front face 131a of the cylinder barrel 130. Due to the guiding of the locking element 610 and the operation member 620 in the first passage 611 and the second passage 621, respectively, of the blocking member 600 arranged inside the lock device casing 210 and formed for instance as separate component, said device may also easily be retrofitted at relatively low cost in existing installations. Moreover, the cooperation of the locking element 610 inserted by means of the operation member 620 into the bore 112 of the cylinder casing 110 with the chamfer 113 of the bore 112 creates in addition to an already satisfactory positive locking also a frictional connection permitting to secure the lock device cylinder 100 in the lock device casing 210. Finally, a simple and relatively low cost production of the device may be obtained by the fact that the locking element 610 is constructed in the form of a ball, while the operation member 620 is formed in the form of a stud screw. The above given explanations are also applicable to the embodiment shown in fig. 5.