EP2754800B1 - Strike box or mortise lock - Google Patents

Description

The invention relates to a mating box or a mortise lock according to the preamble of claim 1.

Counter boxes or mortise locks without locking device have long been known from practice. In these boxes or locks, it was basically possible to manipulate by force on the protruding from the door end of the rod or attached end-side latch the mating box or the mortise lock. Therefore, one has begun to incorporate locking devices in the power flow between the rod and the shift nut to interrupt the power flow from the rod to the shift nut at one point, so that an external force on the rod connection does not lead to actuation of the shift nut and thus leading to an unwanted open.

However, the locking devices known from practice are each relatively complex and cumbersome.

From the FR 2 929 978 A1 already goes a mortise lock with a lock case and a lock cover having lock housing out. The known lock has at least one rod connection mounted in the lock housing for connecting a rod and a switching nut coupled to the rod connection, wherein the rod connection is movable between a retracted and an extended position. Effectively, a locking device is provided between the rod terminal and the Schaltnuss, which prevents actuation of the Schaltnuss by external force on the rod connection when the rod connection is in the extended position. The locking device has a movable between a lower locking position and an upper release position locking mandrel, which is movable exclusively by actuation of the shift nut from the locking position. The locking pin is stored in the lock case and the lock cover in each case a slot.

Similar mortise locks are from the FR 2 678 671 A1 or the US Pat. No. 3,670,537 known.

Object of the present invention is therefore to provide a mating box or a mortise lock of the type mentioned with a locking device available, which is constructed as simple and inexpensive and a safe interruption of the power flow between the rod terminal and the Schaltnuss with external force on the Rod connection guaranteed. To solve the above object, a counter box or a mortise lock according to claim 1 is provided. According to the invention, the locking mandrel is movable by its own weight from the release position to the blocking position and the lower slot position represents the blocking position and the upper slot position, the release position. First, it is through the realization of the locking device in the functional or power flow chain between the bar connection and the Schaltnuss possible in a simple manner, to prevent accidental operation or movement of the Schaltnuss on the rod connection. In this case, the invention as an essential part of the locking device on a blocking element in the form of a locking mandrel, which is simple and inexpensive to produce. This locking pin is movable between two positions, namely the lower locking position and the upper release position. Thus, the locking mandrel is ultimately back and forth in the vertical direction, and this vertical mobility does not have to be limited to an exclusively vertical trajectory. Also, oblique or arcuate trajectories are possible. The decisive factor is ultimately that the locking mandrel is moved from a lower level to an upper level and vice versa, wherein in the lower level is a blocking of the rod connection, while the rod connection released in the upper level and the functional chain between the rod terminal and the Schaltnuss made or is no longer interrupted. If the locking pin is thus in the locking position, the shift nut can not be moved by external force acting on the rod connection. The blocking position can only be canceled by the fact that the pusher is actively actuated by a pusher. Thus, the locking device can only be disabled by the intentional operation of the coupled with the pusher pusher and the lock released.

For the simplest possible integration of the locking pin in the lock housing is provided according to the invention that the locking pin on the one hand in the lock case and on the other hand on the opposite side of the lock housing is stored in the castle ceiling in each case a slot.

In a very simple embodiment, such slots can be realized by simple slots on opposite sides of the lock housing.

In this case, to further simplify the locking device and to ensure a trouble-free function of the locking mandrel according to the invention designed such that it is movable from the release position by its own weight in the locked position. This can be realized that the lower slot position in the installation direction of the counter box / mortise lock represents the blocking position and the upper slot position represents the release position. This ensures that the locking mandrel, when forced from the blocking position to the release position during active actuation of the shift nut, is moved upward, while the movement of the locking pin from the release position back into the blocking position takes place solely due to the dead weight of the locking mandrel.

For trouble-free movement of the locking pin between the locking and the release position, the locking pin end each have a storage area to intervene in the respective slot in the lock case and the lock cover.

Incidentally, there is a mandrel region provided for coupling between the abovementioned bearing regions, which is guided by further components, which belong to the blocking device and will be discussed in more detail below, and serves to connect them.

On the other hand, areas of the locking pin, which do not serve for guiding or coupling with other components of the locking device, preferably deliberately thickened to ensure the proper weight of the locking pin and thus the automatic movement of the locking pin between the upper release position and the lower locking position.

In principle, it is possible that the locking device can be provided to block only a single rod connection. This can be both about the upper as well as the lower bar connection act. Preferably, however, it is so that the locking device is provided and designed both for blocking the upper and the lower bar connection. For this purpose, the locking device has an upper locking pin for blocking the upper rod connection and a lower locking pin for blocking the lower rod connection.

In order to be able to ensure the movement of the upper locking mandrel by the Schaltnuss, a mandrel contour is provided in the Schaltnuss, through which the upper locking mandrel is guided. The mandrel contour in this case has a blocking region in which the upper locking mandrel is locked, and a freewheeling region in which the blocking is released and a movement of the sliding nut is made possible. Between the two areas there is a Entsperrnase over which the upper locking mandrel is moved from the restricted area in the freewheel area or on active actuation of the Schaltnuss. Ultimately, the Entsperrnase ensures that when actively operating the Schaltnuss the locking mandrel is lifted from the locked position and moved into the freewheeling area.

In addition to the upper locking mandrel, the locking device as another, separate component on a lying in the line of movement between the rod terminal and the Schaltnuss locking lever, which is coupled on the one hand to the rod terminal and on the other hand with the Schaltnuss. This locking lever is designed such that it is locked when force is introduced via the rod connection by the upper locking mandrel, while it is only or exclusively by means of active actuation of the Schaltnuss unlocked and activated.

Constructively, the upper locking mandrel in this context - as the Schaltnuss - on a mandrel contour through which the upper locking mandrel is guided. In this case, the mandrel contour of the locking lever also has a blocking area and a movement of the locking lever enabling freewheeling area, while in this case - unlike the Schaltnuss - missing at a Entsperrnase or otherwise unlocking. In this way, it is ultimately ensured that unlocking can not take place via the rod connection coupled to the blocking lever but exclusively via the switching nut which is actively coupled via the pusher and coupled to the blocking lever. Due to the aforementioned embodiment, the flow of motion is interrupted when force is introduced into the rod connection on the locking lever, while the movement flow during active actuation of the Steering nut from the shift nut over the upper locking pin and the locking lever to the bar connection is continuous.

The coupling of the rod connection with the locking lever is preferably carried out via a rod connection. This is preferably a shaped piece of wire. Such a piece of wire is relatively easy and inexpensive to produce.

While it is in principle possible that the locking lever in the lock case is linearly movable, it offers for constructive reasons to pivotally store the locking lever, since then the rotational movement of the shift can be converted directly into a rotational or pivotal movement of the locking lever.

For actuating the locking lever, the shift nut has an actuating portion designed in particular as a roller bearing, which acts on an actuating surface of the locking lever. When the pushbutton is actively actuated by means of a push-button, two processes ultimately occur. On the one hand, the locking pin is lifted out of the locking position, so that it is located in the respective mandrel contours in the freewheel areas, which allows a pivoting or rotational movement of the sliding nut and the locking lever. The further operation of the shift nut is transmitted directly via the actuating portion to the actuating surface of the locking lever, which is then pivoted and leads due to its coupling with the rod terminal for retraction of the rod. If the rod terminal, however, the end applied by force on the end of the rod, which is equivalent to a manipulation of the corresponding rod or its end, unlocking does not take place because the upper locking mandrel remains in the locked position and out of this without the action of the sliding nut provided Entsperrnase can not be moved out of this position.

As a result, a locking device for blocking the upper bar connection is provided by the above features, which ultimately only requires two separate components, namely coupled to the bar connection locking lever and the upper locking mandrel, with other functional areas of the locking device by corresponding contouring on the Schaltnuss and be realized in the locking lever and slots in the lock housing.

Instead of blocking the upper bar connection or in addition to blocking the upper bar connection, in a preferred embodiment of the invention Also be provided that the lower bar connection can be blocked on the principle of the invention via the locking device. For this purpose, the locking device on a lower locking mandrel which is movable between a lower locking position and an upper release position. The movement of the lower locking mandrel out of the blocking position also takes place exclusively here / only by actuation of the sliding nut. If the lower locking pin is thus in the lower locking position, the shift nut can not be moved by an external force acting on the lower rod connection. The power flow between the lower rod terminal and the Schaltnuss is interrupted or blocked by the blocking of the lower locking mandrel when the lower locking pin is in the lower blocking position.

In a structurally simple embodiment of the lock for the lower rod end is provided that the lower slots for the lower locking pin in the lock case and the castle ceiling each have a locking contour and a guide contour. Thus, the slots required anyway for the storage of the lower locking mandrel with the functions of the need-based blocking in the locking contour or the leadership of the locking mandrel in the guide contour are occupied. So if the locking pin is in the locking contour, if the lower locking pin strikes against the locking contour, a further moving in of the lower rod connection in the lock housing is not possible. Only when the lower locking pin is in the guide contour, an upward and downward movement of the lower locking pin in the guide contour is possible.

It is preferred in this context that the lower bar connection acts with external force from below on the lower locking mandrel and the lower locking mandrel strikes the locking contour or the at least substantially horizontal Sperrkantet the locking contour, so that the lower locking position is reached and the Rod connection can not be pushed into the lock housing.

To connect the Schaltnuss with the lower bar connection is a pull rod. This pull rod may be directly or indirectly connected to the Schaltnuss or the lower bar connection. In the region of its lower end, the pull rod is preferably connected to the lower bar connection, so that an opening movement of the Schaltnuss ultimately leads to a tightening or pulling the lower bar connection in the lock housing.

In addition to the function for moving the lower bar connection, the pull rod acts in addition to the lower locking mandrel together. To realize this function, a corresponding active portion, which is preferably designed as a bevel, is provided on the pull rod in order to move the lower locking mandrel out of the locking contour into the guide contour. As soon as the lower locking mandrel has been moved out of the blocking contour via the active section of the drawbar and thus the blocking has been removed, the lower rod connection can be pulled into the lock housing via the drawbar when the sliding nut is actuated.

With regard to the assignment of the pull rod with a dual function, namely on the one hand the transmission of the Schaltnuss on the lower bar connection and the other hand, the unlocking of the lower locking mandrel on the active section, it is necessary that first the blocking is canceled, the lower locking mandrel thus from the Locking contour is moved out before the bar connection can be fed. To ensure this delayed or successive function of the lower bar connection is secured via a slot connection with little play in the vertical direction on the pull rod. As a result, a relative movement of the drawbar to the rod connection is possible. As a result of this, in the case of a pulling movement triggered by the shift nut, the pull rod is first slightly raised while the bar connection is not yet retracted. During the upward movement of the pull rod of the effective portion or the slope acts on the pull rod on the lower locking pin and pushes it from the locking contour in the guide contour. Once the locking pin has been moved out of the locking contour, the further pulling movement of the pull rod leads to lifting of the lower bar connection or to its insertion into the lock housing. At the same time, the lower locking mandrel moves upwards in the guide contour of the elongated holes. In view of the previously described, timed or successive movement, after which unlocked first and then the lower bar connection is retracted, the shapes of the effective portion or the slope of the slope, the length of the guide contour and the clearance between the lower bar connection and the Pull rod matched.

By the features described last, a locking device for the lower bar connection is provided by the invention further provided, which is also very simple and inexpensive, since ultimately as an additional component compared to a version without locking device only the lower Mandrel is required because the active portion or the slope can be realized on the already provided pull rod and the storage of the lower locking mandrel in the lock housing only corresponding slots must be realized with the necessary guiding and locking contour.

Further advantages, features and possible applications of the present invention will become apparent from the following description of embodiments with reference to the drawings and the drawing itself. In this case, all described and / or illustrated features alone or in any combination form the subject of the present invention, regardless of their Summary in the claims or their dependency.

Fig. 1

eine perspektivische Ansicht eines Gegenkastens,

Fig. 2

eine Draufsicht auf den Gegenkasten aus Fig. 1 unter Weglassung der Schlossdecke des Schlossgehäuses,

Fig. 3

einen Ausschnitt des Schlosskastens des Gegenkastens,

Fig. 4

eine Draufsicht auf einen Sperrhebel des erfindungsgemäßen Schlosskastens,

Fig. 5

eine Draufsicht auf eine Schaltnuss des erfindungsgemäßen Gegenkastens,

Fig. 6

eine Seitenansicht eines Sperrdorns des erfindungsgemäßen Gegenkastens,

Fig. 7

einen Ausschnitt der Schlossdecke des erfindungsgemäßen Gegenkastens,

Fig. 8

eine Ansicht der Sperreinrichtung des erfindungsgemäßen Gegenkastens in Sperrstellung,

Fig. 9

eine der Fig. 8 entsprechende Ansicht der Sperreinrichtung in einem Schnitt,

Fig. 10

eine der Fig. 8 entsprechende Ansicht der Sperreinrichtung, die sich noch immer in der Sperrstellung befindet,

Fig. 11

eine der Fig. 10 entsprechende Ansicht der Sperreinrichtung in einem Schnitt,

Fig. 12

eine der Fig. 8 entsprechende Ansicht der Sperreinrichtung mit beginnender Drehung der Schaltnuss,

Fig. 13

eine der Fig. 12 entsprechende Ansicht in einem Schnitt,

Fig. 14

eine der Fig. 8 entsprechende Ansicht der Sperreinrichtung mit maximal gedrehter Schaltnuss,

Fig. 15

eine der Fig. 14 entsprechende Ansicht der Sperreinrichtung in einem Schnitt,

Fig. 16

eine Draufsicht auf eine weitere Ausführungsform eines erfindungsgemäßen Gegenkastens,

Fig. 17.

eine Draufsicht auf eine Zugstange des Gegenkastens aus Fig. 16,

Fig. 18

eine Draufsicht auf den unteren Stangenanschluss des Gegenkastens aus Fig. 16,

Fig. 19

eine Seitenansicht des unteren Stangenanschlusses aus Fig. 18,

Fig. 20

eine Seitenansicht eines unteren Sperrdorns,

Fig. 21

eine Draufsicht auf den Sperrdorn aus Fig. 20 und

Fig. 22 bis 30

Bewegungsabläufe beim Sperren und Entsperren des unteren Stangenanschlusses des Gegenkastens aus Fig. 16.

It shows

Fig. 1

a perspective view of a counter box,

Fig. 2

a plan view of the mating box Fig. 1 omitting the lock cover of the lock housing,

Fig. 3

a section of the lock case of the counter box,

Fig. 4

a plan view of a locking lever of the lock box according to the invention,

Fig. 5

a plan view of a shift nut of the counter box according to the invention,

Fig. 6

a side view of a locking mandrel of the counter box according to the invention,

Fig. 7

a detail of the lock cover of the counter box according to the invention,

Fig. 8

a view of the locking device of the counter box according to the invention in the locked position,

Fig. 9

one of the Fig. 8 corresponding view of the locking device in a section,

Fig. 10

one of the Fig. 8 corresponding view of the locking device, which is still in the locked position,

Fig. 11

one of the Fig. 10 corresponding view of the locking device in a section,

Fig. 12

one of the Fig. 8 corresponding view of the locking device with beginning rotation of the shift nut,

Fig. 13

one of the Fig. 12 corresponding view in a section,

Fig. 14

one of the Fig. 8 corresponding view of the locking device with a maximum of turned nut,

Fig. 15

one of the Fig. 14 corresponding view of the locking device in a section,

Fig. 16

a top view of a further embodiment of a counter box according to the invention,

Fig. 17.

a plan view of a pull rod of the counter box Fig. 16 .

Fig. 18

a plan view of the lower bar connection of the counter box Fig. 16 .

Fig. 19

a side view of the lower bar connection Fig. 18 .

Fig. 20

a side view of a lower locking mandrel,

Fig. 21

a plan view of the locking pin Fig. 20 and

FIGS. 22 to 30

Motion sequences when locking and unlocking the lower bar connection of the counter box Fig. 16 ,

In Fig. 1 a mating box 1 is shown. It should be pointed out that the following explanations relate exclusively to a mating box 1, but apply in the same way for a mortise lock, as far as the invention or the features essential to the invention are concerned. In this respect, the following statements relate in a similar manner also for a mortise lock, even if this is not specified in detail.

The counter box 1 has a lock housing 2 with a lock case 3 and a lock cover 4. On the front side, a forend 5 is provided on the lock case 3. In the forend 5 are located next to various attachment openings an opening 6 for a Fallenauswerfer 7 and an opening 8 for a Riegelauswerfer 9. The Fallenauswerfer 7 and the Liegelauswerfer 9 are characteristic components of a counter box 1, which are not provided in a mortise lock. Instead, the mortise lock has a latch and a latch.

Furthermore, the counter box 1 has two bar connections 10, 11, namely an upper bar connection 10 and a lower bar connection 11, which are respectively provided for connection of a corresponding bar. The rods are guided through the door, not shown, and engage the end in corresponding openings of strike plates on the frame or floor. Bar connections of the type in question can also be provided in a mortise lock. Furthermore, the mating box 1 a Schaltnuss 12, which is actively actuated by pushers, not shown. By operating the Schaltnuss 12 are on the one hand on the lock mechanism, the rod terminals 10, 11 from its extended position, in the Fig. 1 and 2 is shown, fed into their retracted position and on the other hand, the Fallenauswerfer 7 and the Bolt ejector 9 is activated and swung out.

It is essential that the counter box 1 has a locking device 13, which prevents actuation of the shift nut 12 upon application of a force in the direction of arrow F to the respective extended rod connection 10, 11. This means that despite the action of the respective force F on the rod terminals 10, 11, it is not possible to push them into the lock housing 2 and thus to retract the rods connected to the rod terminals 10, 11. In order to prevent the retraction of the rod terminals by external manipulation, the locking device 13 is operatively provided between the respective rod terminal 10, 11, in the present case the rod terminal 10, and the shift nut 12.

To the locking device 13 includes an upper locking mandrel 14, between a locking position, in the 8 and 9 is shown, and a release position, in the FIGS. 14 and 15 is shown, is movable. It is important in this context that the upper locking mandrel 14, as such in Fig. 6 is shown, only by active actuation of the shift nut 12 from the locked position is movable. The active actuation of the shift nut 12 means that the shift nut 12 must be actuated via the pusher, not shown, to move the upper locking mandrel 14, while an actuation of the shift nut 12 due to the action of a force F via one of the rod terminals 10, 11 not is possible.

The upper locking mandrel 14 is mounted on the one hand in the lock case 3 and on the other hand in the lock cover 4. For this purpose, a slot 15 is provided in the lock case 3, while on the opposite side of the lock housing 2 in the lock cover 4, a slot 16 is provided. The elongated holes 15, 16 are aligned in the assembled state of the lock housing 2 and each have the same length. The lower slot position represents the blocking position 17, while the upper slot position represents the release position 18. The upper locking mandrel 14 itself is not spring-loaded and moves back from the upper release position 18 solely due to its own weight in the lower locking position 17. Nevertheless, it is understood that the upper locking mandrel 14 may be biased in principle by a spring in the direction of the blocking position 17.

The upper locking mandrel 14 itself has at its end a respective storage area 19, 20. In this case, the storage area 19 engages in the slot 20 of the lock cover 4, while the storage area 20 engages in the slot 15 in the lock case 3. A coupling region 21 for connection to components of the locking device 13 adjoins the bearing region 20, while a thickened mandrel region 22, which serves to increase the dead weight of the locking mandrel 14, is located between the coupling region 21 and the bearing region 19.

The upper locking mandrel 14 is coupled to the Schaltnuss 12. For coupling, the shift nut 12 has a mandrel contour 23, which is provided with a blocking region 24 and a freewheeling region 25 and in which the upper blocking mandrel 14 with its coupling region 21 is located. Between the blocking region 24 and the freewheeling region 25 there is an unlocking nose 26, via which, when actively actuated the shift nut 12, the upper locking mandrel 14 is moved from the blocking area 24 in the freewheel area 25.

Furthermore, the locking device 13 has a coupled to the upper bar connection 10 locking lever 27, which is in Fig. 4 is shown. Effectively, the locking lever 27 is locked by the action of a force F on the rod terminal 10, via the upper locking mandrel 14. An unlocking and activation of the locking lever 27 is possible only via the shift 12, only by handle operation.

The locking lever 27 itself is coupled to both the shifting nut 12 and the upper rod connection 10. The coupling of the locking lever 27 with the sliding nut 12 via the upper locking mandrel 14, which is guided with its coupling region by a mandrel contour 28 of the locking lever 27. The mandrel contour 28 has a blocking region 29 and a free-wheeling region 30. A Entsperrnase is not provided in the mandrel contour 28 between the locking portion 29 and the freewheeling portion 30, so that in the attempt to actuate the locking lever 27 from other than by the shift 12 the locking lever 27 remains locked because the upper locking mandrel 14 is not out of the Locking area 29 can be moved.

The coupling of the locking lever 27 with the upper rod terminal 10 via a rod connection 31, which is ultimately a shaped piece of wire. The rod connection 31 has in the illustrated embodiment, an end angled bracket, which engages in a corresponding opening of the rod terminal 10 and an opening 32 in the locking lever 27.

The locking lever 27 itself is pivotally mounted on the lock case 3. The relevant bearing opening 33 is in Fig. 4 illustrated and ultimately flows into the mandrel contour 28, but without this has an effect on the function of the mandrel contour 28. For exact guidance during the pivoting of the locking lever 27, a slot portion-shaped slot 34 is provided in the lock case 3, moreover, in which the angled end of the rod connection 31, which is guided through the bearing opening 33, engages.

The activation of the pivoting movement of the locking lever 27 via the Schaltnuss 12. For this purpose, the Schaltnuss 12 has a protruding arm 35 on which a roller bearing 36 is provided as an operating portion. The roller bearing 36 acts on an actuating surface 37 on the locking lever 27. The actuating surface 27 is in this case formed arcuate portion-shaped and allows a running of the roller bearing 36 during pivoting of the locking lever 27th

The Fig. 8 to 15 now show the area of the counter-box 1, where the locking device 13 is realized. It is located in the in the 8 and 9 In this state, the pusher 12 associated pusher is in a horizontal position, while the rods, not shown, are extended.

In the 10 and 11 is shown a situation in which a force F is exerted on the upper bar connection 10, not shown. This leads to a slight pivoting of the locking lever 27 along the slot 34. This pivotal movement of the locking lever 27 is exclusively due to a game of the mandrel contour 28 relative to the upper locking mandrel 14. The force F does not cause the upper locking mandrel 14 from the blocking position 17th is moved to the release position 18.

In the FIGS. 12 and 13 a situation is shown in which the shift nut 12 is slightly actuated and begins to rotate. The rotation of the shift nut 12 causes the upper locking mandrel 14 is lifted from the locking portion 24 in the direction of the Entsperrnase 26. For this purpose, the surface from the lowest point of the blocking region 24 to the highest point of the Entsperrnase 26 is chamfered correspondingly and formed as a ramp. The in the FIGS. 12 and 13 shown position does not yet show the end position or the complete unlocking of the upper locking mandrel 14, which is not yet completely in the respective freewheeling area 25, 30 of the respective mandrel contour 23, 28. The further rotation of the cam 12 causes the complete lifting or lifting the upper locking pin 14 from the locking position to the release position 18. At the same time, the roller bearing 36 acts on the actuating surface 37 of the locking lever 27, which upon further rotation of the shift 12 to pivot the locking lever 27 leads. In this case, the respective freewheeling region 25, 30 allows the movement of the sliding 12 and the locking lever 27. The movement of the cam 12 causes the rest through the lock mechanism, the retraction of the rod terminals 10, 11 and the rods connected thereto.

In the not shown, spring-assisted return movement of the shift 12 of the in the FIGS. 14 and 15 position shown in the in the 8 and 9 shown position, the upper locking mandrel 14 initially remains in the upper Release position 18 and falls after the respective freewheeling area ends in the blocking area 24, 29 and thus in the lower locking position 17 due to its own weight.

In Fig. 16 and the following figures, another embodiment of a counter box 1 according to the invention is shown. In principle, the mating box 1 can also be a mortise lock. In this respect, the following statements also refer to a mortise lock, even if this is not specified in detail.

The counter box 1 here also has a lock housing 2, a lock case 3 with lock cover 4 and forend 5. The other, previously described means such as trap and Latch ejector are provided in this mating box 1. Furthermore, an upper bar connection 10 and a lower bar connection 11 are provided. Incidentally, the counter box 1 in the same way a locking device 13, as has been previously described in connection with the upper bar connection 10.

It is expressly understood that the locking device 13 in the present embodiment, in principle, a lock for the upper bar connection must not have realized. In any case, in the embodiment described below, the locking device 13 is formed only to block the lower bar connection 11.

In any case, the locking device 13 for blocking the lower bar connection 11, a lower locking mandrel 38, as shown in the FIGS. 20 and 21 is shown. The lower locking mandrel 38 has two outer bearing portions 39, 40, with which it is mounted in slots 41, 42 on opposite sides in the lock case 3 and the lock cover 4. The elongated holes 41, 42 in the lock case 3 and the lock cover 4 correspond to the shape and design. In addition, the locking mandrel 38 has a central coupling region 43, which is thickened relative to the bearing regions 39. At the end after the coupling region 43, a thickened mandrel region 44, 45 is provided, which ultimately serves to increase the weight of the locking mandrel 38.

The two elongated holes 41, 42 each have a locking contour 46 and a guide contour 47. The locking contour 46 has an approximately horizontally extending Locking edge 48, which merges via a curve in an obliquely running leading edge 49 of the guide contour 47.

In the FIGS. 18 and 19 is the lower bar connection of the counter box 1 off Fig. 16 shown. The lower bar connection 11 is provided with a pull rod 50 as shown in FIG Fig. 17 is shown connected. The pull rod 50 itself is, what is not shown in detail, indirectly or directly connected to the shift nut 12. The connection of the lower rod terminal 11 with the tie rod 50 is effected here by the fact that a bearing pin 51 is provided on the lower rod terminal 11, which engages in a slot 52 of the tie rod. At the bearing pin 51, a rivet 53 connects to the captive connection of the tie rod 50 with the lower rod terminal 11 at. Due to the elongated hole 52, in which the bearing pin 51 is located, results in the vertical direction a small clearance between the lower rod terminal 11 and the tie rod 50 and a relative mobility of the two components to each other.

In order to ensure, moreover, sufficient guidance of the drawbar 50 with respect to the lower bar connection 11, the drawbar 50 has at its lower end a plug-in section 54 which is arranged in a pocket section 55 of the lower bar connection 11. For further correct guidance of the drawbar 50 in the vertical direction is a vertical guide slot 56, into which a bolt 57 which is mounted in the lock case 3 and in the lock cover 4 on opposite sides, engages. Furthermore, the pull rod 50 has a slot 58, engages in the stop, which serves to limit the movement in the up and down movement of the pull rod.

Furthermore, a shoulder 59, which is provided for cooperation with the coupling region 43 of the locking mandrel 38, is formed on the lower rod connection 11. This will be discussed in more detail below. For cooperation with the lower locking mandrel 38, moreover, a bevel 60 provided at the lower end of the drawbar 50 serves as the active section. The bevel 60 is designed to move the lower locking mandrel 38 out of the locking contour 46 into the guide contour 47. This will also be described in detail below.

In the FIGS. 22 and 23 is in each case the lower part of the counter box 1 with lock cover 4 ( Fig. 22 ) and without lock cover 4 ( Fig. 23 ). In this state, the rod terminal 11 and thus the lower rod, not shown, is extended. The lower locking mandrel 38 is located in the lower part of the locking contour 46th Due to the dead weight of the lower rod, not shown, the force F acts down, while the locking mandrel 38 is due to its own weight in the lower part of the locking contour 46.

In the FIGS. 24 and 25 , which from the view the FIGS. 22 and 23 correspond, an external force F is exerted from below on the lower rod, not shown, and thus on the lower rod terminal 11. Since the lower rod terminal 11 relative to the tie rod 50 in the scope of the play of the slot 52 is displaceable, the lower rod terminal 11 with respect to the in the FIGS. 22 and 23 shown situation on the tie rod 50 moves until the lower end of the insertion portion 54 comes to rest at the lower end of the pocket portion 55. At the same time, the shoulder 59 abuts on the coupling portion 43 of the lower locking mandrel 38.

In the FIGS. 26 and 27 is shown the state in which is pressed at further force application F on the lower bar connection 11 of the locking mandrel 38 with its two bearing portions 40 against the locking edge 48 of the locking contour 46. There is thus a blockage of the lower rod end 11 via the locking device 13. A further application of force in the vertical direction does not lead to a further movement of the lower bar connection 11 in the direction of force. Further pulling in or pushing in of the lower rod connection 11 into the lock housing 2 is not possible.

In Fig. 28 is shown a state in which the Schaltnuss has been operated 12 to the opening. Due to the connection of the shift 12 with the pull rod 50 this has been pulled upwards. Since the drawbar 50 is relatively movable with respect to the lower bar connection 11, the lower bar connection 11 initially remains in its lower position. The upward movement of the pull rod 50 causes the bevel 60 acts against the coupling region 43 of the lower locking mandrel 38 and moves it out of the locking contour 46 into the guide contour 47. In this context, it should be noted that the locking contour 46 has a slightly wider opening area than the guide contour 47. This shape of the locking contour 46 is necessary in the present case to move the locking mandrel 38 safely out of the locking contour 46 in the guide contour 47.

In Fig. 29 is shown a state in which the pull rod is retracted maximally in the lock housing 2. The locking mandrel 38 is on the slope 60 in the Guide contour 47 has been forced. In the illustrated state, the locking mandrel 38 abuts with its coupling region 43 on the side 61 of the lower rod connection 11. Fig. 29 shows the maximum intake state of the lower bar connection 11th

A reverse rotation of the cam 12 leads to re-extension of the lower rod terminal 11, which in Fig. 30 is shown. The locking mandrel 38 falls by its own weight from the guide contour 47 back into the locking contour 46th In the in Fig. 30 shown state, the locking pin 38 is at the transition from the guide contour 47 in the locking contour 46. Immediately following the in Fig. 30 shown position of the locking mandrel falls back into the in the FIGS. 22 and 23 shown position. <B> LIST OF REFERENCES: </ b> 1 Strike box 33 bearing opening 2 lock housing 34 slot 3 lock case 35 poor 4 lock cover 36 roller bearing 5 stulp 37 actuating surface 6 opening 38 lower locking mandrel 7 Fallenauswerfer 39 storage area 8th opening 40 storage area 9 Riegelauswerfer 41 Long hole 10 rod connection 42 Long hole 11 rod connection 43 coupling region 12 switching nut 44 thickened spine area 13 locking device 45 thickened spine area 14 upper locking pin 46 locking contour 15 Long hole 47 guide contour 16 Long hole 48 blocking edge 17 locking device 49 leading edge 18 release position 50 pull bar 19 storage area 51 bearing bolt 20 storage area 52 Long hole 21 coupling region 53 rivet 22 thickened spine area 54 insertion section 23 Dorn contour 55 pocket portion 24 stopband 56 guide slot 25 Freewheel area 57 bolt 26 unlocking projection 58 Long hole 27 locking lever 59 shoulder 28 Dorn contour 60 slope 29 stopband 61 page 30 Freewheel area 31 bar linkage F force 32 opening

Claims (14)

1. A strike box (1) or mortise lock, with a lock housing (2) having a lock box (3) and a lock cover (4), at least one rod connection (10, 11) mounted in the lock housing (2) for connecting a rod and a switching nut (12) coupled with the rod connection (10, 11), wherein the rod connection (10, 11) is movable between a retracted and an extended position, wherein locking device (13) is provided operatively between the rod connection (10, 11) and the switching nut (12), which prevents an actuation of the switching nut by external force application (F) on the rod connection (10, 11), if the rod connection (10, 11) is located in the extended position, wherein the locking device (13) has a locking mandrel (14, 38) movable between a first position as lower locking position and a second position as upper release position, which is movable from the locking position exclusively by actuation of the switching nut (12) and wherein the locking mandrel (14, 38) is mounted in the lock box (3) and the lock cover (4) in each case in an elongated hole (15, 16: 41, 42),
   characterized in
   that the locking mandrel (14, 38) is movable by its own weight from the release positon into the locking position and that the lower elongated-hole position constitutes the locking position (17) and the upper position the release position (18).
2. A strike box or mortise lock according to Claim ¹, characterized in that the locking mandrel (14, 38) on the end side in each case has a bearing region (19, 20; 39, 40) and between the bearing regions (19, 20) a coupling region (21, 43) for the connection of components of the locking device (13) and at least one thickened mandrel region (22; 44, 45) to increase its own weight.
3. A strike box or mortise lock according to Claim 1 or 2, characterized in that the locking device (13) has an upper locking mandrel (14) for locking the upper rod connection (10) and/or a lower locking mandrel (38) for locking the lower rod connection (11).
4. A strike box or mortise lock according to any one of the preceding claims, characterized in that the upper locking mandrel (14) is guided by a mandrel contour (23) in particular of the switching nut (12) and/or that the mandrel contour (23) has a locking region (24) and a free-run region (25), wherein between the locking region (24) and the free-run region (25) an unlocking nose (26) is provided, by means of which upon actuation of the switching nut (12) the locking mandrel (14) is moved from the locking region (24) into the free-run region (25).
5. A strike box or mortise lock according to any one of the preceding claims, characterized in that the locking device (13) has a locking lever (27) coupled with the rod connection (10) and that, preferably, the locking lever (27) upon force application is locked by means of the rod connection (10) by the upper locking mandrel (14), wherein, in particular, the locking lever (27) can be unlocked and activated exclusively by means of the switching nut (14).
6. A strike box or mortise lock according to Claims 3 and 5, characterized in that the upper locking mandrel (14) is guided by a mandrel contour (28) of the locking lever (27) and that the mandrel contour (28) has a locking region (29) and a free-run region (30).
7. A strike box or mortise lock according to one of Claims 5 or 6, characterized in that the rod connection (10) is coupled with the locking lever (27) via a rod connection (31) and that, preferably, the rod connection is designed as a shaped piece of wire.
8. A strike box or mortise lock according to any one of Claims 5 to 7, characterized in that the locking lever (27) is pivot-mounted on the lock box (13).
9. A strike box or mortise lock according to any one of Claims 5 to 8, characterized in that the switching nut (12) has an actuation section designed in particular as a roller bearing (36), which acts on an actuation surface (37) of the locking lever (27).
10. A strike box or mortise lock according to Claim 3 and if appropriate according to any one of Claims 4 to 9, characterized in that the lower elongated holes (41, 42) for the lower locking mandrel (38) in the lock box (3) and the lock cover (4) in each case have a locking contour (46) and a guide contour (47).
11. A strike box or mortise lock according to Claim 10, characterized in that the lower rod connection (11) upon force application acts from below on the lower locking mandrel (38) and the lower locking mandrel (38) strikes against the locking contour (46) for the locking, so that the lower locking position is obtained.
12. A strike box or mortise lock according to any one of the preceding claims, characterized in that a pull rod (50) is provided coupled with the switching nut (12) and/or coupled with the lower rod connection (11).
13. A strike box or mortise lock according to claims 10 and 12, characterized in that the pull rod (50) has a section interacting with the lower locking mandrel (38) designed in particular as a chamfer (60), in order to move the lower locking mandrel (38) from the locking contour (46) into the guide contour (47).
14. A strike box or mortise lock according to Claims 12 or 13, characterized in that the lower rod connection (11) is fastened to the pull rod (50) via an elongated-hole connection with a little play in the vertical direction and thus is movable relative to the pull rod (50).

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