EP3617432B1 - Closure device for a door - Google Patents

Description

The invention relates to a locking device for a door, in particular for a door of a caravan or a mobile home according to the preamble of claim 1. The invention also relates to a door with a locking device.

The invention can be used, in particular, in the case of doors of caravans or mobile homes, which usually have several doors on their outer sides, in order, for example, to close stowage and service areas. Luggage or camping utensils can sometimes be stored in the stowage areas and the service areas can be used to hold gas bottles or water containers.

Because of this diverse use of such spaces, modern mobile homes and caravans in particular also have a whole series of doors of different sizes that are appropriately distributed over the outside so that the visual effect of the caravans and mobile homes also depends in part on the design of the doors.

In the context of this application, the term “door” is understood to mean very generally devices for closing an opening, in particular on the outside of a vehicle, that is to say also flaps, such as stowage flaps or service flaps, lids, hatches and the like. The term "door" includes not only the movable door leaf, but also the door frame, which is usually fixed. If, however, a movement of the door is referred to below, this only means a movement of the door leaf and not a movement of the door frame.

In order to lock doors, it is known to provide locking devices on these in order to keep the doors or the door leaves in a closed position. For this purpose, locking devices usually have one or more locking elements and correspondingly configured locking counterparts into which the locking elements can engage. One of the two elements is arranged on the door leaf and the corresponding other element on the door frame. In a closed position, movement of the two elements relative to one another is then prevented in such a way that the door is held in the closed position.

Particularly in areas in which optics and aerodynamics play an important role, doors that can be opened or closed via a push-push mechanism have recently been increasingly used, since such doors do not have any handle elements on the outside of the door leaves the door need more. With such push-push mechanisms the locking element and the locking counterpart are then designed in such a way that they interact as a push-push lock.

To open as well as to close the door, it is sufficient to apply a pressure force, that is to say a "push", to the door leaf. When opening, this leads to the door leaf initially moving further in the closing direction before the door leaf springs back through the closed position when the force is removed and the door leaf then protrudes above the frame of the door and the door can be opened. To implement such a push-push mechanism, the locking element must be able to move when the door is opened and closed. A door that can be opened and closed using a corresponding locking device according to the push-push principle is, for example, in the EP 3 287 579 A1 described.

Since such doors can be opened very easily via a corresponding "push" and are only pre-locked in the closed position, however, the door can also be opened comparatively easily inadvertently. If such doors are arranged on the outside of a caravan and the caravan drives quickly into a tunnel, it can happen, for example, that a blast of air acts on the door that is sufficient to open the door.

Due to the possibility of simply opening such a door, it is necessary to secure it against unintentional opening in the pre-locked closed position. Although it is known to provide additional devices for the main locking of the door, such as sash latches or locking bolts, so that the door can no longer be opened unintentionally, it is, however, associated with a comparatively large amount of effort. In addition to the push-push locking, such additional devices are also to be provided.

the WO 2015/022 106 A1 relates to a device having a mechanism for bringing a component from an open to a closed state and vice versa. The device has a locking part which is mounted displaceably in a receptacle and protrudes from the receptacle by a first width in an open state of the component and by a second width in a closed state and is received in a component receptacle.

the DE 10 2011 116 067 A1 discloses a lock for a tank or loading flap in a vehicle, which has a locking bolt which can be adjusted between an open and a closed position by opening and closing the flap. This is forcibly guided in the housing of the lock in the direction of its longitudinal axis and around its longitudinal axis against the force of a compression spring.

the FR 2 930 201 A discloses a lock for a fuel cap which has a locking element in the form of a locking pin which can be held in its locked position by a securing hook.

The object of the invention is to specify a locking device which itself enables the door to be locked securely in such a way that the door cannot be opened unintentionally.

In the case of a closure device of the type mentioned at the outset, this object is achieved by the features of claim 1.

By means of a blocking device, which can block a movement of the locking element, the door can be safely main-locked so that it can no longer be opened unintentionally. The blocking device is itself part of the locking device and acts on the locking element, so that no additional elements are required in addition to the locking device. In order to secure the door accordingly, it must first be brought into the closed position with a "push". In this position the door is initially in a pre-locked position and could be opened again by another "push". In order to then main-lock the door so that it can no longer be opened, the blocking device can block a movement of the locking element. Another "push" on the door then no longer leads to the door being opened due to the blocking of the locking element. In order to open the door again, the blocking device must first release the locking element again.

It has proven to be advantageous if the blocking device interacts with the locking element. The blocking device can interact directly or indirectly with the locking element and thus reliably prevent a movement of the locking element.

Furthermore, the blocking device can form a structural unit with the locking element, which enables a compact design. Such a compact design cannot be achieved in the case of closure devices which are secured against unintentional opening by an additional blocking device not belonging to the closure device itself.

It has been found to be advantageous if the locking counterpart has a guide for the locking element. The locking element can be guided in the guide and pass through the guide during a closing or opening process. The guide can be used as a control cam, in particular as a heart track, as is known from closure devices working according to the push-push principle. To produce a corresponding guide, this can be milled into the locking counterpart.

From a structural point of view, it has proven to be advantageous if the locking counterpart is designed to be flat, for example plate-shaped, so that it requires very little space.

The locking counterpart can have fastening means, in particular recesses such as bores, via which it can be connected to the door leaf or to the door frame, for example with screws or bolts. Such a fastening is characterized by a low installation effort.

In particular with regard to the guide, it has been found to be advantageous if the locking counterpart has a blocking area into which the locking element can fall when moving in the closing direction of the door. The blocking area can be designed in such a way that the door is pre-locked in this position, i.e. cannot be opened by a tensile force. The blocking area can have a contour corresponding to the locking element, so that the locking element can rest against this contour of the blocking area.

Furthermore, it has been found to be advantageous, in particular with regard to the guide, if the locking counterpart has a release area into which the locking element can fall out of the blocking area when the door is moved in the closing direction. When the locking element is in the release area, the door can be opened.

With regard to the opening process, it has proven to be advantageous if the locking element falls automatically from the blocking area into the release area when the door is moved in the closing direction. When the door is moved in the closing direction, the locking element can leave the closing area independently and then move over the opening area into the release area.

Furthermore, it has proven to be advantageous if the locking counterpart has a closing area which is arranged between the release area and the blocking area and which is traversed by the locking element when the door is moved in the closing direction. The closing area can be designed in such a way that the locking element is transferred from the release area into the blocking area. Furthermore, the closing area can have a run-up contour against which the locking element strikes when the door moves in the closing direction and is then transferred along the run-up contour from the closing area to the blocking area.

Furthermore, it has been found to be advantageous if the locking counterpart has an opening area which is arranged between the blocking area and the release area and is traversed by the locking element when the door leaf is moved in the opening direction. In order to move the locking element from the blocking area into the opening area, it can first be moved by a movement in the closing direction of the door, which means that the locking element strikes a stop and is then transferred from the locking position into the opening area. The locking element can pass through the opening area independently and then come to rest in the release area. The release area and the blocking area can be the areas in which the locking element rests when there is no force acting on the door. This can happen when the door is closed Locking element located in the blocked area and in a ajar position of the door in the release area. It is advantageous if the locking element does not rest in the opening and closing areas, but merely passes through these areas.

From a structural point of view, it has proven to be advantageous if the closing area has a run-on bevel. A malfunction of the locking device can be avoided by means of this run-up bevel. The run-up bevel can be arranged in the end of the closing area facing the release area, so that the locking element must pass the run-up bevel when it is transferred from the release area into the closing area. The opening area, which is also in direct contact with the release area, preferably has no run-up bevel, but an edge which can prevent the locking element from being moved out of the release area into the opening area. In this respect, the run-on bevel ensures that the locking element always enters the closing area in the event of a closing movement from the release position.

With regard to the movement of the locking element, it is provided that it can be moved in the radial direction. A radial movement enables the locking element to be reliably guided in the guide when the door is closed or opened. During a closing process or an opening process, the locking element can move in the radial direction in the guide. The locking element can pass through the various areas of the guide. The locking element can be prestressed in the radial direction and move against the force of a spring when moving through the guide. It is particularly advantageous if the locking element can move both in the radial direction and in the axial direction. Both in radial The locking element can be guided in a straight line in the direction as well as in the axial direction.

Furthermore, it has proven to be advantageous if the locking device has a housing in which the locking element and the blocking device are mounted. By mounting the locking element and the blocking device in a housing, a compact construction of the locking device can be realized. It is preferably a common housing. The blocking device and the locking element are advantageously arranged for the most part in the housing. The housing can have a recess through which a part of the locking element can extend and to that extent protrude from the housing. This part can be a locking area of the locking element that is guided in the guide. The recess can be designed as an elongated hole in which the locking area of the locking element can move in the radial direction. The blocking device can be guided in the housing. It is advantageous if the blocking device and the locking device are mounted or guided on different, in particular on opposite sides, of the housing.

The locking element or the locking area of the locking element can be designed in the manner of a locking pin and have a cylindrical shape. This enables a smooth movement of the locking area in the guide.

The housing can have a centering device for centering the locking counterpart. The centering device can be designed in such a way that the locking counterpart is centered when the door closes. The centering lock can be on the side of the housing be arranged, from which the locking area of the locking element protrudes.

According to the invention it is provided that the locking element is mounted in a movable slide. The storage in a slide enables a reliable movement of the locking element in the radial direction. The slide can be guided in the housing and the housing can have stops to limit the movement of the slide. The locking element can be mounted on the slide, in particular the slide has a guide in which the locking element is axially guided. It is advantageous if the locking element can move in the axial direction relative to the slide.

It is also provided that the blocking device blocks the particularly radial movement of the locking element in the blocking position. By blocking the, in particular, radial movement of the locking element, it can no longer move in the recess of the housing and thus also no longer move in the guide. If the locking element is in the blocking area of the guide and is prevented from moving radially, the door can no longer be opened and is securely locked.

According to the invention it is further provided that the blocking device for blocking the locking element can engage in the slide and prevent it from moving radially. By blocking the slide movement, the locking element mounted on the slide can also be blocked at the same time. The blocking device can engage in the slide in the manner of a locking pin and prevent it from moving in the blocking position. The slide can have a depression or a recess, for example in the form of a bore or a blind hole, into which the blocking device can engage. It is advantageous if the bore is designed as an elongated hole, since manufacturing tolerances can also be compensated for by such a design. A positive connection can exist between the blocking device and the slide in the blocking position. Since the blocking device cannot move in the radial direction with respect to the housing, the slide is also prevented from a corresponding radial movement. The blocking device can move relative to the slide for blocking or for releasing the blocking. It is advantageous if this movement takes place orthogonally to the radial movement of the slide and parallel to the axial movement of the locking element.

In an embodiment not according to the invention, it is possible that the blocking device is arranged on the locking counterpart and can be moved into the guide. In this embodiment, the blocking device can comprise a blocking element which can be extended in the manner of a blocking pin or a blocking wall. The blocking element can prevent a movement of the locking element from the blocking area into the opening area or into the release area. Furthermore, two blocking elements can also be provided. When the locking element is in the blocking area of the guide, the two blocking elements can be moved into the guide in such a way that the locking element can no longer move in the guide. By moving the blocking elements into the guide, it is closed and the locking element is prevented from moving radially.

The blocking device can be actuated via a drive, i.e. moved back and forth. The drive can be designed as an electric motor. The motor can be arranged in the same housing as the blocking device. If the locking device is used on a vehicle, the motor can be coupled to the central locking of the vehicle. The closure device can have a corresponding connection point for this purpose. The motor can be coupled to the blocking device via a rotatable eccentric disk. Alternatively, however, other couplings between the motor and the blocking device are also possible, for example the motor and the blocking device can interact in the manner of a rack and pinion gear.

Furthermore, it has proven to be advantageous if the blocking device can be unlocked in an emergency. The blocking device can also be released by an emergency release if the drive is defective, for example, or the blocking device cannot be moved over it for another reason. The blocking device can have a corresponding emergency release for this purpose. The blocking device can be manually moved out of the blocking position via the emergency release so that the locking element can be released and it can then move radially again. The blocking device can be connected to a rope or to a Bowden cable, via which the blocking device can be emergency unlocked, in particular manually.

Furthermore, it has proven to be advantageous if the blocking device for emergency unlocking can be moved out of the blocking position against the force of a spring element. The blocking device can be pretensioned in the direction of the blocking position by the spring element. In the blocking position, the blocking device can be moved manually against the force of the spring, regardless of the function of the motor, and thus be unlocked in an emergency. As soon as the emergency release force no longer acts on the blocking device, it can move back into the blocking position by itself due to the spring force. It is advantageous if the blocking device can be emergency unlocked from inside a vehicle.

Furthermore, it has been found to be advantageous if the closure device has a detection unit which can detect the position of the blocking device. The detection unit enables a statement to be made as to whether the blocking device is in the blocking position or not. The detection unit can be connected to a display which can indicate the status or the position of the blocking device. The detection unit can also detect the position of the locking element and coordinate this with the position of the blocking device. In particular, if the blocking device is designed in such a way that it can be moved into the guide, collisions between the blocking elements and the locking element can be prevented. The detection unit can comprise one or more light barriers. In addition, the detection unit can also detect the position of the engine.

Furthermore, it has proven to be advantageous if the locking counterpart is arranged on a carrier and can be moved relative to the carrier in order to adjust the position of the locking counterpart. By positioning the locking counterpart, the position of the locking counterpart relative to the locking element in the closed position can be set. In this way it is possible to adjust the door in such a way that the door leaf does not protrude above the frame of the door in the closed position. For example, when the locking device is used for the door of a mobile home, it can be adjusted so that the door does not protrude beyond the outer contour of the mobile home. Furthermore, the contact pressure of the door leaf in the closed position can also be set by setting the position of the locking counterpart.

Furthermore, a door with a locking device is proposed, the locking device in the manner described above is trained. The advantages already described with regard to the closure device result.

With regard to the arrangement of the locking device, it has proven to be advantageous if the locking element is arranged on the door frame and the locking counterpart is arranged on the door leaf. It is particularly advantageous if the locking element is arranged on the front side on the door frame and the locking counterpart is arranged on the front side on the door leaf. The locking element and the locking counterpart can be arranged on the door in such a way that both elements are not visible from the outside when the door is closed.

Alternatively, however, it is also possible to arrange the locking element on the door leaf and the locking counterpart on the door frame.

Fig. 1

die Verschlussvorrichtung in einer perspektivischen Ansicht;

Fig. 2

das Gehäuse der Verschlussvorrichtung in einer Ansicht gemäß Fig. 1;

Fig. 3

das an einem Träger angeordnete Verrieglungsgegenstück;

Fig. 4

die Verschlussvorrichtung gemäß Fig. 1 ohne Abdeckung;

Fig. 5a

das an dem Träger angeordnete Verriegelungsgegenstück in einer oberen Stellung in einer perspektivischen Ansicht;

Fig. 5b

das Verriegelungsgegenstück gemäß Fig. 5a in einer Seitenansicht;

Fig. 6a

das an dem Träger angeordnete Verriegelungsgegenstück in einer unteren Stellung in einer perspektivischen Ansicht und in einer Seitenansicht;

Fig. 6b

das Verriegelungsgegenstück gemäß Fig. 6a in einer Seitenansicht;

Fig. 7

einen Querschnitt durch das Gehäuse der Verschlussvorrichtung

Fig. 8a

einen Querschnitt durch das Gehäuse der Verschlussvorrichtung, wobei das Verriegelungselement blockiert ist;

Fig. 8b

einen Längsschnitt durch das Gehäuse gemäß Fig. 8a;

Fig. 9a

einen Querschnitt durch das Gehäuse der Verschlussvorrichtung, wobei das Verriegelungselement nicht blockiert ist;

Fig. 9b

einen Längsschnitt durch das Gehäuse gemäß Fig. 9a;

Fig. 10a

einen Querschnitt durch das Gehäuse der Verschlussvorrichtung, wobei die Blockiervorrichtung notentriegelt ist;

Fig. 10b

einen Längsschnitt durch das Gehäuse gemäß Fig. 10a;

Fig. 11a

eine perspektivische Ansicht des Verriegelungsgegenstücks mit ausgefahrenen nicht erfindungsgemäßen Blockierelementen;

Fig. 11b

eine perspektivische Ansicht des Verriegelungsgegenstücks mit eingefahrenen nicht erfindungsgemäßen Blockierelementen;

Fig. 12

eine Draufsicht auf das Verriegelungsgegenstück gemäß der Fig. 11a und 11b.

Further details and advantages of the invention are given below with reference to FIG Figures 1 to 12 are explained in more detail. Show in it:

Fig. 1

the locking device in a perspective view;

Fig. 2

the housing of the locking device in a view according to FIG Fig. 1 ;

Fig. 3

the locking counterpart arranged on a carrier;

Fig. 4

the locking device according to Fig. 1 without cover;

Figure 5a

the locking counterpart arranged on the carrier in an upper position in a perspective view;

Figure 5b

the locking counterpart according to Figure 5a in a side view;

Figure 6a

the locking counterpart arranged on the carrier in a lower position in a perspective view and in a side view;

Figure 6b

the locking counterpart according to Figure 6a in a side view;

Fig. 7

a cross section through the housing of the closure device

Figure 8a

a cross section through the housing of the closure device, wherein the locking element is blocked;

Figure 8b

a longitudinal section through the housing according to Figure 8a ;

Figure 9a

a cross section through the housing of the closure device, wherein the locking element is not blocked;

Figure 9b

a longitudinal section through the housing according to Figure 9a ;

Figure 10a

a cross section through the housing of the locking device, wherein the locking device is emergency unlocked;

Figure 10b

a longitudinal section through the housing according to Figure 10a ;

Figure 11a

a perspective view of the locking counterpart with extended blocking elements not according to the invention;

Figure 11b

a perspective view of the locking counterpart with retracted blocking elements not according to the invention;

Fig. 12

a plan view of the locking counterpart according to FIG Figures 11a and 11b .

Mobile homes and caravans have various doors on the outside, which are mostly used to lock storage or service rooms. For example, items of luggage, folding furniture or similar camping utensils can be arranged in the storage spaces. Service rooms can be used, for example, to hold gas bottles, waste water containers or the like. A large number of corresponding storage and service spaces and therefore also a large number of corresponding doors are therefore often arranged on the outside of mobile homes and caravans.

Due to the positive appearance and aerodynamics, such doors do not have handles on the outside to open or close them, but a push-push lock is used. Such a lock enables both closing and opening of the door only a compressive force has to be applied to the door, for which no handles are required.

A closure device 1 that works on the push-push principle is in the Fig. 1 shown. For reasons of clarity, the door leaf 2.1 and the door frame are not shown. In this exemplary embodiment, however, it is the case that the locking counterpart 4 is arranged on the door leaf side and the locking element 2 is arranged correspondingly on the frame side. The closing direction is in the Fig. 1 denoted by S, so that the locking counterpart 4 arranged on the door leaf 2.1 during a closing process from below against the in the Fig. 2 locking element 3 shown starts up.

Like this in the Fig. 3 As can be seen, the locking counterpart 4 has a guide 6 in the form of a heart curve, in which the locking element 3 moves when the door is closed or in which the locking element 3 is guided. During a closing movement, the locking element 3 moves back and forth in the recess 8.2 due to the course of the guide 6 in the radial direction R. This is discussed below with regard to the Fig. 12 will be explained in more detail.

At the front end of the housing 8, in which the locking element 3 is mounted, the housing 8 has two fin-like projections which serve as a centering device 9 and ensure that the locking counterpart 4 and thus also the door leaf 2.1 are centered when the door is closed.

In the Fig. 4 is the locking device 1, as well as in the Fig. 1 , shown in the position in which the door is closed. The locking counterpart 4 according to Fig. 3 was accordingly from below between the two centering devices 9 according to FIG Fig. 2 emotional. The representation of the Fig. 4 differs from the representation of the Fig. 1 only insofar as that the cover 8.1 in the Fig. 4 is not shown. In the position according to Fig. 4 the door is closed and pre-locked. It can be opened again in the closing direction S by a "push", that is to say by a compressive force, on the door leaf 2.1.

In the Figures 5a and 5b and 6a and 6b the locking counterpart 4 mounted on a door leaf 2.1 is shown in different positions. Since the position of the locking counterpart 4 relative to the locking element 3 in the closed position also defines the position of the door leaf 2.1 in the door frame, the position of the door leaf 2.1 relative to the door frame in the closed position can also be set by adjusting the position of the locking counterpart 4. The locking counterpart 4 is not directly connected to the door leaf 2.1, but it is mounted on a carrier 7 which is connected to the door leaf 2.1. The carrier 7 has corresponding guides for the locking counterpart 4, in which the locking counterpart 4 can move relative to the carrier 7, as shown in FIG Figure 6a can be seen. The locking counterpart 4 can thus also be moved relative to the door leaf 2.1 via the carrier 7.

In the Figures 5a and 5b is the locking counterpart 4 in an upper maximum position and in the Figures 6a and 6b shown in a lower maximum position.

Corresponding positioning can, for example, compensate for manufacturing and assembly tolerances. At the same time, however, the contact pressure of the door or of the door leaf 2.1 on a seal arranged in the door frame can also be adjusted in this way. In the upper maximum position, the contact pressure would be significantly lower than in the lower maximum position.

In the following, the internal structure of the housing 8 and the mode of operation and the movement of the locking element 3 will now be based on Fig. 7 are described before then using the FIGS. 8 to 10 the functioning of the blocking device 5 is explained in more detail, by means of which a movement of the locking element 3 can be blocked.

In the Fig. 7 is that in Fig. 2 Housing 8 shown in a sectional view. A linearly movable slide 3.2, which can be moved back and forth in the radial direction R, is arranged in the housing 8. In the position shown, the slide 3.2 is in an end position in which the slide 3.2 rests against a stop on the housing 8. In this position it is therefore in accordance with the orientation of the illustration in Fig. 7 only possible to move the carriage 3.2 in the radial direction R upwards. The carriage 3.2 is in the in Fig. 7 position shown biased. For the sake of clarity, this spring 5.2 is not shown in the figure, but it is located between the other stop of the housing 8 and the slide 3.2.

The locking element 3, which can be moved in the axial direction A, is arranged in the slide 3.2. The carriage 3.2 has a corresponding guide 6 for the locking element 3, which enables axial movement. This guide 6 is also in the further Figures 8a, 9a and 10a easy to see, since the locking element 3 is not shown in these. The locking element 3 is biased by a spring 3.1 and can be moved in the axial direction A against the spring force into the housing 8 or into the slide 3.2. The dimensioning of the locking element 3 is such that a locking area 3.3 of the locking element 3 designed as a locking pin always protrudes from the housing 8.

So that the locking area 3.3 protruding from the housing 8 can move in the radial direction R together with the slide 3.2, the housing 8 has a recess 8.2 designed as an elongated hole, which is also shown in the perspective view of FIG Fig. 2 is easy to see. The ends of this recess 8.2 form radial stops for the locking element 3 or for the above locking area 3.3 and to this extent limit the linear movement of the locking element 3 in the radial direction R. During a closing process, the locking area 3.3 of the locking element 3 plunges into the locking counterpart 4 or into the guide 6 of the locking counterpart 4, as is the case with regard to the FIGS. 1 to 4 has already been explained. Due to the guide 6, the locking element 3 then moves back and forth in the housing 8 together with the slide 3.2 in the radial direction R. Furthermore, due to the configuration of the guide 6, the locking element 2 also moves in the axial direction A, which in view of the Fig. 12 will be explained in more detail.

In order to move the door leaf 2.1 into the closed position with respect to the door frame or to correspondingly open the door again, the locking element 2 must move in the radial direction R. By preventing a movement in the radial direction R, the door can also be prevented from being opened unintentionally. In order to reopen a closed door that has been locked in this way, the locking element 3 must first be released again before the door can then be opened via a "push".

Since a door that is pre-locked in the closed position can be opened very easily via a "push", precautions must be taken to secure the door against unintentional opening, since in many situations such a simple door opening is not desired. For example, if a motor home drives into a tunnel at high speed, Due to the pressure forces acting on the outside of the mobile home, it can happen that doors arranged on the outside open automatically. In order to prevent such an unintentional opening, a blocking device 5 cooperating with the locking element 3 is provided, with which the door can be locked in the pre-locked position. The blocking device 5 is described below with reference to FIGS. 8 to 10 described, in which the blocking device 5 is shown in various positions. The ones in the Figures 8a, 9a and 10a The cross-sections shown correspond to the cross-section of Fig. 7 in a slightly different cross-sectional height, which is why the blocking device 5 in the Fig. 7 is not so clearly visible. For the sake of clarity, the locking element 3 is shown in FIG Figures 8a, 9a and 10a not shown, but only the carriage 3.2.

In the Figures 8a and 8b the blocking device 5 is shown in a blocking position in which the slide 3.2 and thus also the locking element 3 cannot be moved in the radial direction R. The blocking device 5 has a blocking element 5.1 designed in the manner of a locking bolt, which can engage in a recess 3.4 of the slide 3.2 designed as a blind hole. Since the blocking device 5 or the blocking element 5.1 cannot be moved in the radial direction R, a movement of the carriage 3.2 in the radial direction R is blocked.

In order to release the slide 3.2 again, the blocking element 5.1 must be pulled out of the slide 3.2 again. For a corresponding actuation of the blocking device 5, a motor drive is provided which, however, is not shown in the figures. The drive is connected to an external energy source via connection 8.3 and can be controlled accordingly. About the drive, the blocking element 5.1 between the in the Figures 8a and 8b shown blocking positions and in the Figures 9a and 9b Approval positions shown, in which a movement of the carriage 3.2 is made possible, can be moved linearly back and forth.

The blocking element 5.1 of the blocking device 5 is pretensioned in the direction of the blocking position via a spring 5.2. In order to transfer the blocking element 5.1 from the blocking position to the release position, it must be moved accordingly against the force of the spring 5.2. If the motor should fail and a movement of the locking element 3 is blocked, the door can only be opened again when the blocking element 5.1 has been pulled out of the slide 3.2. So that the door can still be opened even if the motor fails, the blocking device 5 has an emergency release 5.3, via which the carriage 3.2 can also be released again manually.

The emergency release 5.3 is connected to the blocking element 5.1. Via this, the blocking element 5.1 can be moved against the force of the spring 5.2 and the carriage 3.2 can thus be released again. The emergency release 5.3 can be moved manually for this purpose via a cable pull, not shown in the figure.

In an embodiment not belonging to the invention, the blocking device 5 is not arranged in the housing 8, but in or on the locking counterpart 4. The corresponding locking counterpart 4 is in the Figures 11a and 11b shown. When the locking element 3 or the locking area 3.3 guided in the guide 6 is located in the blocking area 6.3 of the guide 6, the door cannot be opened by a tensile force, but only by a "push" in the closing direction S. In this embodiment, the blocking device 5 has two blocking elements 5.1, which can be moved into the guide 6 to block a movement of the locking element 3. In the in the Figure 11a The blocking position shown is therefore a movement of the locking area 3.3 of the locking element 3 prevented due to the blocking elements 5.1 and the door cannot be opened. In order to open the door again, the blocking elements 5.1 must release the guide 6 again so that the locking element 3 can then move in the guide 6 again.

The mode of operation of the push-push locking and the various areas of the guide 6 will now be explained in more detail below.

The locking counterpart 4 has a guide 6 in which the locking element 3 is guided during a relative movement between the door leaf 2.1 and the door frame. This guide 6 essentially consists of four different areas 6.1 to 6.4. According to the orientation of the Fig. 12 the release area 6.1 is arranged in the upper area of the guide 6. When the locking element 3 is in this release area 6.1, the door leaf 2.1 can be moved relative to the door frame. In this position, the door leaf 2.1 protrudes above the door frame, so that the door can be opened, for example, by a manual pulling movement or also by the force of a spring which supports the opening of the door.

If a compressive force is applied to the door in this position, the locking element 3 can be transferred from the release area 6.1 into the closing area 6.2 via the run-up bevel 6.5. The locking element 3 moves in the axial direction A.

The guide 6 also has a blocking area 6.3 in which the locking element 3 is arranged in a locking position. The guide 6 also has an opening area 6.4 which connects the blocking area 6.3 with the release area 6.1.

In the open position, the locking element 3 is initially in the release area 6.1 of the locking counterpart 4. In this position, the door can be moved in the opening direction and thus opened. To close the door, it and thus the locking element 3 are introduced into the closing area 6.2 via the run-up bevel 6.5. During this movement, the locking element 3 is moved in the recess 8.2. As soon as the locking element 3 has reached the lower end of the closing area 6.2, it moves further to the left into the blocking area 6.3 due to the spring 5.2 acting on the slide 3.2. The door can no longer be opened by pulling force in this position. The shell-shaped configuration of the contour of the guide 6 in the blocking area 6.3 ensures that the locking element 3 cannot move any further. The spring 5.2 acting on the slide 3.2 ensures that the locking element 3 or the locking area 3.3 according to the orientation of the Fig. 12 is pushed to the left.

If the door is to be opened again, a force in the closing direction S must be exerted on the locking element 3. By moving the locking element 3 in the closing direction S, it will strike the outer, left-hand contour of the opening area 6.4 from the blocking area 6.3, so that the locking element 3 can then be transferred back into the release area 6.1 via the opening area 6.4. The areas 6.2 to 6.4 are located higher than the area 6.1. As a result, the locking element 3 cannot enter the opening area 6.4 from the release area 6.1 during a movement in the closing direction S, but is moved into the closing area 6.2 via the run-up bevel 6.5. When crossing the corresponding edge 6.6, the locking element 3 therefore moves in the axial direction A.

The design of the guide 6 and the functioning of the corresponding areas are shown in FIG Fig. 12 in connection with a blocking device 5 shown, which can be retracted into the guide 6, but they are not limited to this embodiment. Rather, that can be with regard to Fig. 12 described embodiment of the guide 6 can also be used when the blocking device 5 interacts with the carriage 3.2.

Reference number:

1

Locking device

2.1

Door leaf

3

Locking element

3.1

feather

3.2

sleds

3.3

Locking area

3.4

deepening

4th

Locking counterpart

4.1

Fasteners

5

Locking device

5.1

Blocking element

5.2

feather

5.3

Emergency release

6th

guide

6.1

Sharing area

6.2

Closing area

6.3

Restricted area

6.4

Opening range

6.5

Approach slope

6.6

Edge

7th

carrier

8th

casing

8.1

cover

8.2

Recess

8.3

connection

9

Centering device

A.

Axial direction

R.

Radial direction

S.

Closing direction

Claims (10)

1. Closure device for a door, in particular for a door of a caravan or of a mobile home, having a movable locking element (3) which, in the closing position, engages in a locking counterpart (4) and prelocks the door, wherein the locking element (3) and the locking counterpart (4) are formed in such a way that they interact as push-push locking, and having a blocking device (5) which, for the main locking of the door, can block a movement of the locking element (3), wherein the locking element (3) is movable in the radial direction (R) and wherein the blocking device (5), in the blocking position, blocks a radial movement of the locking element (3), characterized
   in that the locking element (3) is mounted in a movable carriage (3.2), wherein, to block the locking element (3), the blocking device (5) can engage in the carriage (3.2) and prevent the latter from moving.
2. Device according to Claim 1, characterized in that the blocking device (5) forms a structural unit with the locking element (3).
3. Device according to either of the preceding claims, characterized in that the locking counterpart (4) has a guide (6) for the locking element (3).
4. Device according to one of the preceding claims, characterized in that the locking element (3) is movable in the axial direction (A).
5. Device according to one of the preceding claims, characterized by a housing (8) in which the locking element (3) and the blocking device (5) are mounted.
6. Device according to one of the preceding claims, characterized in that the blocking device (5) can be emergency-unlocked.
7. Device according to Claim 6, characterized in that, for emergency unlocking, the blocking device (5) can be moved out of the blocking position against the force of a spring element.
8. Device according to one of the preceding claims, characterized in that the locking counterpart (4) is arranged on a carrier (7) and, to set the position of the locking counterpart (4), is movable with respect to the carrier (7).
9. Door having a closure device (1) according to one of the preceding claims.
10. Door according to Claim 9, characterized in that the locking element (3) is arranged on the door frame, and the locking counterpart (4) is arranged on the door leaf (2.1).

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