EP0796968B1 - Closure device - Google Patents

Abstract

The mechanism has a locking mechanism for the bolt-driving bar. A separate door-arrester mechanism (2) is provided, having a two-position bolt in a pivoting bracket on the frame and sliding between the engaged and free positions. A linkage (4-7) from the locking mechanism is coupled to a pivoting release hammer opposite a release pin, so that after unlocking the bolt-driving mechanism the hammer moves the two-position bolt into the free position.

Description

The invention relates to a locking device for a Door with a fixed frame.

A locking device for a door with a fixed frame, comprising an espagnolette locking device arranged in a door leaf, at which can be locked with a locking unit whose locking rod locking unit, a door catch device arranged separately from the drive rod locking device, in which a bolt element in a catch unit articulated on the fixed frame in a take - and a release position can be pushed, and a linkage device, is known from DE-C-3 503 466. The espagnolette lock has one with a bolt actuating device coupled drive rod. The The driving rod is used for mechanical purposes Coupling the main lock with at least one additional lock. On the other hand, it serves as a bolt Door catch device from a take-away to a release position to push. Adjusting the bolt in the Carrying position takes place via a gear transmission. in the A cone is arranged on the drive rod in the region of the bolt. By moving the drive rod the cone becomes along a pin connected to the bolt guided and thereby pushed into the release position. This releases the bolt from a swivel bracket that is connected to a fixed frame surrounding the door.

The disadvantage is that with an unlocking movement for a door release also moves the entire connecting rod must become. For pushing back the bolt in addition, an additional force can be applied. Disadvantageous is still that by using the drive rod decoupling as a door catch release element the additional locks must be made. He follows this decoupling does not make operation difficult the locking device when the door is opened additionally.

A connecting rod lock known from DE-C-3 836 693 has a middle lock attached to a faceplate on. A drive rod-operated extends above the same Additional lock. Middle lock latch and additional lock locking part are in sync from both the nut of the Middle lock as well as by key actuation same in the open position. The additional lock locking part is a striking plate controlled a slope inclined, in the outward direction spring-loaded slide assigned to release the tied up in the retracted position and in the open additional locking part for actuation of the drive rod. The preloaded slide has that Task that after closing the door without key operation is better secured.

From DE-A-3 831 529 and DE-A-4 114 007 is a Espagnolette lock known in which a latch-espagnolette locking unit actuated with a follower becomes. By turning the follower nut a bolt becomes and actuated the connecting rod with additional locks. With Locking takes place with the help of a key unit the locking rod locking unit, so that a Shift from its closed to its open position is prevented.

Now becomes a door in which such an espagnolette lock is arranged, in addition with a door catch device provided, a release position with Do not use the drive rod, as it will open the door is held by door handles arranged on both sides performed. Linking such an opening process with moving the bolt of the door catch device would inevitably be in a release position lead to ineffectiveness of the door catch device. However, their decoupling would have the consequence that a clickable door still closed it remains because the bolt is in the driving position Swivel bracket of the door safety device does not release.

The task therefore arises, a known one Locking device for a door with a fixed frame like this further develop that when using an espagnolette locking device a door catch device from the espagnolette locking device is releasable.

According to the invention, this object is achieved by the features of claim 1 solved.

The advantages achieved with the invention are in particular in that after unlocking the locking rod locking unit with the clamping unit Door catch device by moving the clamping unit further be brought into an unlocked position can. This unlocking is facilitated by the fact that the "wound" bolt element with the help of the release hammer is returned to its basic position. Reduce the forces to be applied by the clamping unit only a slight trigger movement. Additional forces for pushing back the bolt element are not required.

This is possible because the tensioning device is made of there is a pivotable knob nut. On the trigger nut is arranged. Between its end opposite the release element and a pin arranged on the pin element is rotatable an end web joint element attached. This is it is possible that the clamping device in cooperation with the energizing pin element takes two settings. The energy load the bolt element is preferably carried out by a Tension spring. When pushing out the bolt element in its pull position is tensioned and this tensioned end position by the end position joint element is held. Will over the trigger element the knob nut is moved by the end position element the second end position and thus a relaxation of the Tension spring connected with a retraction of the bolt element taken in its release position.

• einer Schlüsselschiene, die mit einem Schließbart der Schließeinheit oder einer Zuhaltung der Riegel-Treibstangenverschließeinheit verstellbar ist,
• einer Fallenschiene, dessen eines Ende an die Schlüsselschiene anlegbar und dessen gegenüberliegendes Ende mit einem verstellbaren Bewegungsübertragungselement verbunden ist,
• einer Türfangschiene, die den Abstand zwischen der Treibstangenschließeinrichtung und der Türfangeinrichtung überbrückt, in dessen eines Ende das Bewegungsübertragungselement und in dessen gegenüberliegendes Ende der Entriegelungshammer kraftschlüssig hineinragt.

It is advantageous if the linkage device is composed of the following parts:

• a key rail, which can be adjusted with a locking bit of the locking unit or a locking device for the locking rod locking unit,
• a latch rail, one end of which can be placed against the key rail and the opposite end of which is connected to an adjustable movement transmission element,
• a door catch rail, which bridges the distance between the connecting rod locking device and the door catch device, in one end of which the movement transmission element and in the opposite end of the unlocking hammer force-fit.

The key rail and the latch rail are both in the espagnolette locking device is arranged.

This subdivision of the boom means that that the distance from the clamping unit to Unlocking hammer guided according to position and function becomes. It also ensures that the release hammer with locked locking rod locking unit not operated and the unlocking process of Bolt drive rod locking unit not hindered becomes.

The key rail can be used as a parallel to the bolt guided u-shaped profile be. A u-leg can contact with the lock bit. The other u-leg can rest on the latch rail.

A locking recess can be inserted into the latch rail be introduced into which a drive rod-fixed pin the locking mechanism for the deadbolt is adjustable is. This ensures that at a Lock the door with the locking bar locking unit with built-in linkage for the Unlocking the door catch device does not have any effect can be made.

The motion transmission element can be made as an L-shaped trained profile element be formed.

Its long L-leg can be a lever bar element, that protrudes into a rod engagement recess.

The short L-leg can be a contact lever element be that rotatable with the other end of the latch rail connected is.

At the connection point between the rod lever element and the contact lever element can be arranged a rotary lever bearing be.

It is advantageous if the unlocking hammer is a has such a configuration that is similar to a stone hammer is. It can be made from a hinge handle with a End is non-positively connected to the door catch rail and the other end with the hammer in a pivot pin is stored. The hammer itself consists of the release lever and one opposite the pivot lever arranged together.

An energy storage-guided can be on the trap rail Linkage stroke limiting element can be arranged, the one can be positioned relative to the pin that is fixed to the connecting rod Has engagement recess. This will make a targeted Limit of movement of the entire boom reached and damage to the release hammer avoided.

Fig. 1

eine Schließvorrichtung mit einer Treibstangenschließeinrichtung und gesondert angeordneter Türfangeinrichtung in nicht eingebautem, wenigstens teilweise geöffneten Zustand,

Fig. 2

eine Türfangeinrichtung einer Schließvorrichtung gemäß Fig. 1 in einer vergrößerten Darstellung,

Fig. 3

eine Treibstangenschließeinrichtung einer Schließvorrichtung gemäß Fig. 1 in einer vergrößerten Darstellung,

Fig. 4

eine Schlüsselschiene einer Schließvorrichtung gemäß Fig. 1 in einer schematischen Seitenansicht,

Fig. 5

eine Fallenschiene einer Schließvorrichtung gemäß Fig. 1 in einer schematischen Seitenansicht,

Fig. 6 und 7

vergrößerte Teildarstellungen einer Treibstangenschließeinrichtung gemäß Fig. 3,

Fig. 8

eine vergrößerte Teildarstellung einer Türfangeinrichtung gemäß Fig. 2 und

Fig. 9

eine mit einem Mitnahmebolzenelement mitgenommenen Schwenkflügel einer Türfangeinrichtung gemäß den Fig. 1, 2 und 8 bei einem spaltgeöffneten Türflügel.

An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it:

Fig. 1

a locking device with an espagnolette locking device and separately arranged door catch device in the non-installed, at least partially open state,

Fig. 2

1 in an enlarged view,

Fig. 3

1 in an enlarged view,

Fig. 4

2 shows a key rail of a locking device according to FIG. 1 in a schematic side view,

Fig. 5

1 in a schematic side view,

6 and 7

3 shows enlarged partial representations of an espagnolette locking device according to FIG.

Fig. 8

an enlarged partial view of a door catch device according to FIG. 2 and

Fig. 9

one with a driving pin element entrained swivel wing of a door catch device according to FIGS. 1, 2 and 8 with a gap-open door wing.

• einer Treibstangenverschließeinrichtung 1 (Haupt schloß) und
• einer Türfangeinrichtung 2 (Türwächter).

A locking device according to FIG. 1 consists of

• an espagnolette locking device 1 (main lock) and
• a door catch device 2 (door guard).

It is essential to the invention that of a clamping unit 74, 76 a linkage device 4, 5, 6, 8 up to Door catch device 2 is guided.

• Einer Schlüsselschiene 4Die Schlüsselschiene 4 ist, wie die Fig. 3 und 4 zeigen, im Querschnitt u-förmig ausgebildet und weist u-Schenkel 47 und 48 auf. Sie beginnt an der Schließeinheit 74, 76. Die Schließeinheit ist ein Schließzylinder 74 mit einem Schließbart 76. Der untere u-Schenkel 74 ist so positioniert, daß er mit dem Schließbart 76 in Kontakt gebracht werden kann. Die Schlüsselschiene 4 ist so angeordnet, daß sie parallel zu einem Riegel 54 verschiebbar ist.
• Einer Fallenschiene 5 Die Fallenschiene 5 kontaktiert mit ihrem einen Ende den u-Schenkel 48 der Schlüsselschiene 4. Sie ist ein den Bauverhältnissen der Treibstangenschließeinrichtung angepaßtes Profil (vgl. Fig. 3 und 5). Die Fallenschiene 5 weist eine Verriegelungsausnehmung 23 in Form eines Langlochs auf, in der ein treibstangenfester Zapfen 51 verschiebbar positioniert ist. Über den treibstangenfesten Zapfen 51 ist drehgelenkig, wie insbesondere Fig. 7 zeigt, ein Gestängehubbegrenzungselement 7 angeordnet. Das Gestängehubbegrenzungselement 7 weist eine entenähnliche Form auf. Seine Führungsnase 157 kontaktiert ein Drehlager 159. Das Drehlager 159 ist über eine Führungsfeder 160 mit dem Gestängehubbegrenzungshebelelement 7 verbunden. Das Gestängehubbegrenzungselement 7 weist eine Eingriffsausnehmung 161 auf, die in Eingriff zum treibstangenfesten Zapfen 51 gebracht werden kann.
• Einem Bewegungsübertragungshebelelement 8Das Bewegungsübertragungsshebelelement 8 (vgl. Fig. 3 und 7) weist eine hundekopfähnliche Konfiguration auf. Die Schnauze stellt ein Hebelstabelement 81, der Kopf selbst ein Kontakthebelelement 84' und das Auge ein Hebeldrehlager 82 dar. Das Ende des Kontakthebelelements 84' liegt kraftschlüssig am Ende der Fallenschiene 5 an.

The boom device consists of the following individual parts:

• A key rail 4 The key rail 4 is, as shown in FIGS. 3 and 4, U-shaped in cross-section and has U-legs 47 and 48. It begins at the locking unit 74, 76. The locking unit is a locking cylinder 74 with a locking bit 76. The lower u-leg 74 is positioned so that it can be brought into contact with the locking bit 76. The key rail 4 is arranged so that it can be moved parallel to a bolt 54.
• A latch rail 5 The latch rail 5 contacts with one end the u-leg 48 of the key rail 4. It is a profile adapted to the structural conditions of the connecting rod locking device (cf. FIGS. 3 and 5). The latch rail 5 has a locking recess 23 in the form of an elongated hole in which a pin 51 fixed to the connecting rod is slidably positioned. A rod stroke limiting element 7 is pivotally articulated over the pin 51, which is fixed to the connecting rod, as shown in FIG. 7 in particular. The boom stroke limiting element 7 has a duck-like shape. Its guide lug 157 makes contact with a pivot bearing 159. The pivot bearing 159 is connected to the linkage stroke-limiting lever element 7 via a guide spring 160. The boom stroke limiting element 7 has an engagement recess 161 which can be brought into engagement with the pin 51 which is fixed to the connecting rod.
• A motion transmission lever element 8 The motion transmission lever element 8 (see FIGS. 3 and 7) has a dog-head-like configuration. The snout represents a lever rod element 81, the head itself a contact lever element 84 'and the eye a lever pivot bearing 82. The end of the contact lever element 84' lies non-positively on the end of the latch rail 5.

Ultimately, the linkage device consists of a Door safety rail 6.

The door catch rail 6, as shown in FIGS. 1 and 7, a rod engagement recess 80 into which the lever rod element 81 engages non-positively. The door catch rail 6 can be as a bar or flat profile or be designed as a rope or chain. At that of the rod engagement recess 80 opposite end engages an unlocking hammer 137 with its deflecting handle 138 on. The deflection arm 138 leads to a pivot pin 139 and turns into a hammer part, which consists of a Release lever 140 and a stop lever 141 exists (see in particular Fig. 8).

With the linkage device designed in this way, it is possible to with the help of the lock bit 76 the unlocking hammer 137 to move.

The unlocking hammer is, as in FIGS. 2 and 8 is shown, arranged in the door catch device 2. The Door catch device 2 consists of a housing 123 with a bottom plate 123a, which by narrow side surrounding walls 123b, 123c and 123d is surrounded. Locked the housing with a cover 145 of the least is partially shown.

In the housing 123 is a tensionable and guided driving pin element 125 arranged. The guidance of the driving pin element 125 is done by one introduced in it Guide recess 128 along a guide pin 127. The leadership is supported by a Bolt guide 143. Below the guide recess 128 a spring receiving recess 126 is arranged. The Spring receiving recess 126 is partially in the driving pin element 125 and partly in a holding plate 144, on which the guide pin 127 is also positioned is arranged. In between there is a recess which is limited by guide rails. In that way trained spring receiving recess 126 is a Tension spring 124 positioned.

At the sliding end of the driving pin element 125 a pin is arranged, which carries a joint 131. This pin is spaced opposite in the housing 123 a knob nut 129 rotatably positioned. The knob nut 129 has a pointed end, in which a joint 132 is positioned. The joints 131 and 132, as shown in Fig. 2, by a hinge plate 133 bridges and thus form an end position joint element 130. Opposite the tip is on the pommel 129 a nut pin 136 is positioned. On both sides the knob nut 129 are also stop elements 134, 135 positioned. By connecting the knob nut 129 with the spring-loaded driving pin element 125 through the end position joint element 130 takes the driving pin element 125 in the extended state Carrying position and in the retracted state a release position as defined end positions. The summit of the driving pin element 125 is with a bolt head 125 '.

Thus, as shown in FIG. 9, a door leaf 200 opposite one Door frame 210 brought into a gap-open position bolt head 125 'engages in one Backdrop 151 a. A link eye 151a becomes one Swivel bracket 150 penetrated. Another Swinging out the door leaf 200 relative to the door frame 210 becomes the bolt head 125 'along a link edge 151c within a backdrop section 151b of a backdrop 151 led to the end. The swivel bracket 150 is rotatable with a hinge pin 152 on a fitting part 153 attached, that with fasteners 154 is attached to the door frame 210.

The espagnolette locking device 1 is shown in FIGS. 6 and 7 shown in detail.

Just like the housing 123 of the door catch device 2 a lock housing 3 is attached to a faceplate 11. The lock housing consists of a base plate 3a, the surrounded by narrow side walls 3b, 3c and 3d is and limited by a castle ceiling, not shown is. On the faceplate 11 is a drive rod 10 out, with which at least one additional lock can be actuated is. In addition, a lock housing 3 Latch 52 of a latch actuating device 50 arranged, the when the door leaf 200 slams against the Force of a spring 53 is automatically pushed back and to open the door leaf 200 from the follower 12 with the help of a cam 55 the follower nut 12 a driving plate 57 and a trap tail 59 can be withdrawn.

Finally, the connecting rod locking device is in the housing 3 1 of the bolt 54 arranged, the faceplate 11 penetrates and into a pre-closed Positioned when the drive rod 10 in its Closed position, d. H. is moved down.

The lock cylinder 74 and the lock bit 76 serve moreover to lock the drive rod 10 in their lower closed position and via the connecting rod 10 to lock the latch 54 in its advanced Position serves.

The drive rod 10 is with the attached additional locks exclusively by the one with the trigger nut coupled outside and / or inside door handle (not shown) from the open position to the closed position pushed and vice versa.

The trigger follower 12 works with a locking rod locking unit 9 together. The Lever nut 12 on a driver pin 18, which in a Edge recess 14 of a displaceable control element 16 intervenes. For limiting the angle of rotation of the lever handle is on the follower 12 another, in the circumferential direction extending recess 20 arranged, which in a swivel range end position of the lever handle a stop pin 26 arranged in the lock base 3a (159) is present.

The control element 16 consists of a on the lock floor 3a slidably guided carrier plate with a Spring receiving frame 30 (see. Fig. 7). To manage the Control element 16 are between the lock bottom 3a and the top of the lock cover two pins 32, 32 ' arranged. The spring receiving frame 30 carries one Helical compression spring 38. In the rest position of the follower 12 is the coil spring 38 with its two ends both on the respective pin 32, 32 'and on Stop faces of the carrier plates or the spring mounting frame 30 on, so that when moving the support plate down the helical compression spring 38 on the lower pin 32 'remains in support and below Lifting from the upper pin 32 is compressed and vice versa.

On the inside of the control 16 is an edge recess 40 for the engagement of the short lever arm of a transmission lever 42 is provided, which is pivotally mounted on a bolt 44 fixed to the housing is. One end 46 of the transmission lever 42 is approximately circular, while the other arm 49 forms a fork which is fixed to the connecting rod Grips pin 51.

In the position shown in Fig. 3 is the drive rod 10 in its uppermost position, d. H. of the Open position. When the handle follower is turned 45 ° is pivoted clockwise, the control takes 16 the lower end 46 with upwards, with the Consequence that the drive rod 10 simultaneously down in Is pushed towards its closed position. If in this state the trigger is released and the follower nut 12 under the action of the helical compression spring 38 returns to its original position, as shown in Fig. 3, it is circular end 46 free of play on the upper end surface 40 'of the recess 40 and a subsequent downward displacement the control then performs immediately downward movement of circular end 46 and thus to a forward movement of the drive rod 10 in Direction of their open position.

For the exclusion of the bolt 54 is on a housing-fixed Bolt 56 an angle lever 58 pivotally mounted, which overlaps the bolt tail 60 (cf. in particular 3 and 6). It includes a fork-like one Arm 62 of a locking pin 64 of the locking tail 60. The other arm 66 of the angle lever 58 cooperates a control profile of the drive rod 10 together. This Control profile includes a profile recess 68 and cams 72, 72 'with mutually facing profile surfaces 70, 70'. When the drive rod 10 goes down, it runs initially with its recess 68 free in relation to the arm 66 of the angle lever 58 until the profile surface 70 on the Arm 66 comes to a stop. Only then does it start Closing the latch 54, finally the arm 66 on the vertically extending plateau of FIG Cam 72 runs up. Then there is no further shift of the bolt 54 more instead, even if the Drive rod 10 moved further down. To this In this way, a connecting rod locking pin 92 can be used remaining downward movement of the drive rod 10 behind a bolt shoulder 94 or 54 drive, so that a push back of bolt 54 in the excluded position of the bolt 54 through the deepest Position bolt 92 is suppressed.

The functioning of the locking device as it is results from the illustrated embodiment explained.

In the excluded drive rod and latch position can the drive rod 10 and the bolt 54 by actuation of the lock cylinder 74 are secured. After one-turn rotation of the lock bit 76 counterclockwise a tumbler 78 is first raised and an additional bolt 88 released, so that with further Rotation of the locking bar 76 then the additional bolt can move towards the left. The so after Additional latch 88 which is locked on the left then engages with a finger 90 the pin 92 fixed to the connecting rod, whereby the drive rod 10 against unauthorized movement from the closed position up to the open position is blocked. At the same time, the tumbler 78 the key rail 4 horizontally out of the turning range the key bit 76 moves. It is achieved that the door safety device 2 when the door is closed cannot be rendered ineffective. In addition, one Obstruction of the lock bit 76 during the unlocking process avoided.

When actuating the connecting rod fixed pin 51 with the help of the translation lever 42 this is in the locking recess 85 so that it is at the bottom Boundary rounding may apply.

If the lock bit 76 is moved clockwise, is the additional bolt 88 retracted. This is it possible, by actuating the follower 12, the locking rod locking unit 9 to be controlled so that the Bolt 54 and the drive rod can be retracted again. At the same time it is possible with the help of the follower 12 to operate the latch actuating device 50 in such a way that the trap 52 can be withdrawn. At the same time, the key rail 4 is under the Trap rail 5 (original position) moved back.

Is the bolt element 125 as already described in a take-away position has been postponed, the Door by its engagement in the swivel bracket 150 still not open.

The closing movement will be clockwise as usual to open a door completed, the lock bit 56 contacts the lower one u-leg 47 of the key rail 4. This is the Key rail 4 moved upwards and transmits this forward movement on the latch rail 5 further. When the latch rail 5 moves forward, the guide spring 160 of the boom stroke limiting element 7 relieved (see Fig. 7). At the same time it becomes the leader 157 along the pivot bearing 159 (stop pin 26). Here, the tail of the boom stroke limiting lever element 7 in the direction of the connecting rod-fixed Pin 51 moves and encompasses this with the Engagement recess 161. This is in another Forward movement of the entire linkage in a resilient Brought end position.

With the sliding movement of the latch rail 5, the Movement transmission lever element 8 moves. The so far performed lifting movement is by the element 8 in converted a train movement that leads to the door catch 6 moves down.

When moving down (see. Fig. 2 and 8) pulls Door safety bar 6 at the end of the Auslenkstieles 138 des Unlocking hammer 137. This causes the unlocking lever to pivot 140 and presses against the nut pin 136 the knob nut 129. This causes the knob nut in Clockwise, d. H. twisted into an opening movement and actuated the end position joint element 130 in such a way that it returns to its rest position and the stripped Spring 124 can relax. This will make the drive pin element 125 in its release position like this withdrawn that it is from the set eye 151a to down to the level of the outer boundary surface of the Forend rail 11 retracts. The swivel bracket 150 remains in its rest position and gives the door leaf 200 free. This is done with a usual from the outside openable operation with the help of a key ensures that the person responsible for opening the door leaf the espagnolette locking device is authorized from the outside 1 and the door catch device 2 can unlock.

Claims (9)

1. A locking mechanism for a door with a fixed frame (210) comprising:

   a positioning bar locking device (1) disposed in a door leaf (200), wherein the lockbolt and positioning bar locking unit (9) thereof is lockable by means of a locking unit (74, 76),

   a door catch mechanism (2) disposed separately from the positioning bar locking device (1), wherein a bolt element (125) disposed opposite an energy storage means (126), more particularly a tension spring, is slidable, by a tensioning device (129, 130) occupying two end positions, into an entrainment position and a release position, in a catch unit (150), more particularly a swing mount, articulated on the fixed frame (210), and

   a linkage system (4, 5, 6, 8) which extends from the locking unit (74, 76) as far as the tensioning device (129, 130) and which is connected in the door catch mechanism (2) to an unlocking hammer (137) disposed for rotary movement, the unlocking lever (140) of which unlocking hammer (137) is situated in a position of contact readiness opposite a release element (136), more particularly a hub pin of the tensioning device (129, 130), when the bolt element (125) is in the entrainment position,

   so that after an unlocking of the lockbolt and positioning bar locking unit (9) with the locking unit (74, 76) the bolt element (125) is movable from the entrainment position into the release position by a deflection of the unlocking hammer (137).
2. A locking mechanism according to claim 1,
   characterised in that the tensioning device consists of a pivotally disposed knob hub (129) on which the release element (136) is disposed and between whose end (132), more particularly a joint, situated opposite the release element, and a pin (131), more particularly a joint, disposed on the bolt element (125), an end web joint element (130) is disposed for rotational movement.
3. A locking mechanism according to claim 1 or 2, characterised in that the linkage system consists of the following parts:

   a key rail (4), which is adjustable by a ward (76) of the locking unit or a tumbler (78) of the lockbolt and positioning bar locking unit (9), and

   a latch rail (5), whose one end can be applied to the key rail (4) and whose opposite end is connected to an adjustable movement transmission element (8),
   which are disposed jointly in the positioning bar locking device (1), and

   a door catch rail (6), which bridges the distance between the positioning bar locking device (1) and the door catch mechanism (2), into whose one end the movement transmission element (8) and the into whose opposite end the unlocking hammer (137) projects non-positively.
4. A locking mechanism according to claim 3,
   characterised in that the key rail (4) is a u-shaped profile which is guided parallel to the lockbolt (54) and whose one u-limb (47) is contactable with the ward (76) and whose other u-limb (48) bears against the latch rail (5).
5. A locking mechanism according to claim 3 or 4,
   characterised in that a locking recess (85) is formed in the latch rail (5) and in it a pin (51) of the lockbolt and positioning bar locking unit (9), said pin being fixed on the positioning bar, is adjustably disposed.
6. A locking mechanism according to any one of claims 3 to 5, characterised in that the movement transmission lever element (8) is an L-shaped profile element,

   whose long L-limb is a lever bar element (81) which projects into a bar engagement recess (80),

   whose short L-limb is a contact lever element (84') which is connected for rotational movement to the other end of the latch rail (5), and

   in whose connecting point between the lever bar element (81) and the contact lever element (84) a lever pivot bearing (82) is disposed.
7. A locking mechanism according to any one of claims 3 to 6, characterised in that the unlocking hammer (137) consists of an articulation shank (138) which is connected non-positively by one end to the door catch rail (6) and by the other end is mounted with a hammer (140, 141) in a pivot (139).
8. A locking mechanism according to claim 7,
   characterised in that the hammer consists of the unlocking lever (140) and an abutment lever (141) disposed opposite the pivot (139).
9. A locking mechanism according to any one of claims 3 to 8, characterised in that a linkage travel limiting element (7) guided by an energy storage means is disposed on the latch rail (5) and has an engagement recess (161) which is positionable with respect the pin (51) fixed on the positioning bar.

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