EP1207260A2 - Safety device for drive mechanism rods - Google Patents

Abstract

The object of the invention relates to a maloperation lock with a lever (5) which is pivotably mounted on the wing and which carries a locking cam (8) which is assigned at least one locking catch (9) on the drive rod (2). In a predetermined switching position of the drive rod (2) and when the sash is open, the lever (5) is displaced via an energy accumulator (13) acting on it, so that the locking cam (8) engages in the locking catch (9). In the closed position of the wing, the lever (5) is adjusted against the action of the energy accumulator (13) by a stop, whereby the locking cam (8) is disengaged from the locking catch (9) of the drive rod (2). The lever (5) is designed as a two-armed lever, the first lever arm (7) of which supports the locking cam (8) and the second lever arm (12) is assigned to an actuating element (15) which can be displaced and pivoted along the drive rod (2) acts on the lever arm (6). <IMAGE>

Description

The invention relates to a maloperation lock for espagnolette fittings according to the Preamble of claim 1.

Such a maloperation lock is already known from DE 8404724 U1. at this maloperation lock, the lever is designed as a two-armed lever, the one lever arm forms the actuating element, while the other lever arm on it Bottom carries the locking cam or the like. The two-armed lever is supported from a hook that is detachable in a slot of a carrier sitting on the wing is indented. The engagement of the hook is done by one of them turned away edge of the locking cam secured, which in front of the adjacent end of the slot in the carrier engages, while a pressure piece at the free end of the two-armed Lever with its underside the pivot angle of the two-armed lever relative to Support limiting stop member forms. The energy store of the maloperation lock is formed by a leaf spring and also the one carrying the pressure piece or the Actuator-forming lever arm of the two-armed lever is a leaf spring designed, which requires a greater effort to deform than the Leaf spring forming energy store.

The advantage of this known misuse lock is that it is easier to use Training an uncomplicated assignment to a connecting rod of the Espagnolette fitting - even afterwards - enabled and functionally reliable is working. However, it is also advantageous that the misuse lock has a design with which can easily be bridged by significant travel differences resulting from different distances between the fold peripheral surfaces between the wing and Frame. A simple snap-in connection also makes it easy for the layman possible, the known misuse lock on an already functional to install the built-in connecting rod fitting.

Through EP 0 220 391 B2, this known maloperation lock has an improvement experienced in that the two-armed lever in a housing or a cap is included, on the one hand, a simplified attachment to the faceplate enables and on the other hand a reception and protection for the functional elements of the Mishandling device offers.

The object of the invention is to provide the known misuse lock improve that the existing dependence on the distance of the folds or Rebate circumferential surfaces of sash and frame is avoided.

This task is solved by the other lever arm Actuator is assigned, which is displaceable along the drive rod and pivoting acts on the lever arm.

This allows the actuating element to be assigned independently of the distance of the vertically running folds. Instead, the maloperation lock is set an assignment and assignment of the stop and the actuator in vertical Direction ahead, on the one hand by means of functional elements that may be provided anyway - such as B. bolt interventions or the like - and, if necessary, acting on it adjusting devices can be produced and on the other hand the relative orientation from the stop to Actuator in the vertical direction, for example by wing casseroles and Relief devices - as known from DE 9117241 U1 - are already permanent is guaranteed.

At the same time, functional parts protrude from the faceplate into the rebate area avoided that protrude when the sash is open.

Especially with large sashes and / or unstable frame or sash materials the wing can twist and in parts still as far from the frame be spaced apart that a misuse lock attached in the subsections not unlocked.

A further development of the maloperation lock provides that the actuating element consists of a slide with a wedge-shaped end, the free end in front of one protrudes two-arm lever cap, in which the slide is guided, and the triggering stop is assigned. This is a structurally simple configuration the maloperation lock possible, which has the advantages of only a few components known device.

If the wedge-shaped end of the slide with one end of the lever arm arranged bead cooperates, then also the Swiveling movement of the lever arm can take place freely and the friction surface between slider and lever arm is reduced.

In order to ensure that the actuating element is reset be that the actuating element or the slide by means of an energy accumulator in a position is acted upon by force, so that the first lever with its locking cam engages Movement of the connecting rod blocks.

An embodiment is preferred in which the energy accumulator is provided by the leaf spring is formed, which acts on the wedge-shaped end via the second lever arm. It is an arrangement of a further energy store on or in a structural unit with the Actuating element unnecessary.

In order to ensure an optimized application of force to the locking cam, it is advantageous if the cap is arranged directly on the housing of a drive rod drive. This will cause deformation of material sections, e.g. Driving rod sections prevented between the maloperation lock and the drive rod drive. simultaneously is also a deformation of the wing to be feared, particularly in the case of large wings when force is exerted exclusively on the hand lever of the drive rod gearbox - e.g. when closing the sash - and the blocking that may still be caused by it the maloperation lock is prevented.

A further development of the invention relates to the assembly of the maloperation lock on the Driving rod drive. In the case of the maloperation lock known from EP 0 220 391 B2 is provided that the cap with its edges on the carrier, for. B. the Face plate, rests. This cap has a hook base on its underside that fits into a slot of the carrier, e.g. the faceplate, can be engaged. At the same time the cap in some areas following its edges with a wall or a web provided the or a support pad for the free leg of the as an energy store provided leaf spring forms. To attach such Change the malfunction lock so that no snap-snap connection exists, which can be assembled with great effort when the drive rod drive is already installed, it is provided that at the end of the cap opposite the hook extension a holding device which can be locked in a recess in the faceplate is arranged, the one behind the side edges of a faceplate recess pivotable latch.

It can advantageously be provided that the bolt has a front attached tool engagement is actuated. Subsequent installation or Disassembly is therefore possible in a simple manner.

In order to assign additional functions to the malfunction lock at the same time, furthermore the actuating element has a locking means which with a counter locking means on Stop interlocking a pivot opening position of the wing cooperates. The Misuse lock thus has the function of a snap which already has the holds unlocked sash on the frame.

The locking means expediently consists of a locking recess and the Counter-locking means from a complementary locking projection.

Inexpensive manufacture is guaranteed if the stop is made from one Plastic molding is made. This can also make necessary adjustments to the Profile geometry of the frame can be done comparatively easily.

Of particular advantage is an embodiment in which the stop on a Frame attached bearing or one opposite the maloperation lock Fitting part is attached by means of a clamping device. As a result, on the one hand Attachment to a frame-fixed bearing, which is a suitable mount provides and on the other hand, the stop can also be used when the Espagnolette drive not a frame rail but another espagnolette drive opposite, such as on a double-leaf window without a set of timber. The Stop can be on the drive rod drive or an adjoining one Component are attached by means of the clamping device so that no openings or the like. must be provided for attachment. At the same time, everyone can Comments on the clamp fastening a relative orientation of Reach maloperation lock and stop.

The maloperation lock can have a further function in that the latching projection is laterally offset from a position of the latching recess which results in the closed position of the wing. As a result, the sash is held in a position in relation to the frame, so that a gap opening of the sash takes place, which on the one hand signals the opening condition of the sash and on the other hand offers a ventilation opening.
Further advantages result from the drawings.

Fig. 1

ein Treibstangengetriebe mit aufgesetzter Fehlbedienungssperre in isometrischer Darstellung,

Fig. 2 u. 3

eine vergrößerte Darstellung der Fehlbedienungssperre nach Fig. 1 in sperrender Grundstellung in einem Längsschnitt bzw. einer Seitenansicht,

Fig. 4

eine isometrische Darstellung des Treibstangenantriebs mit der Fehlbedienungssperre sowie einem diesem zugeordneten Anschlag in einer isometrischen Darstellung,

Fig. 5 u. 6

die Fehlbedienungssperre mit dem zugehörigen Treibstangenantrieb in einer entsperrten Lage in einem Längsschnitt und einer Seitenansicht,

Fig. 7

eine isometrische Darstellung des Treibstangenantriebs mit der Fehlbedienungssperre bei deren Montage,

Fig. 8

den Treibstangenantrieb und die Fehlbedienungssperre nach Fig. 7 in einem Längsschnitt,

Fig. 9

eine isometrische Darstellung des Treibstangenantriebs mit daran befestigter Fehlbedienungssperre und einem dieser zugeordneten Anschlag in einem weiteren Ausführungsbeispiel, und

Fig. 10, Fig. 11, 12

verschiedene Ausgestaltungen des Anschlags.

Show it:

Fig. 1

an espagnolette with an incorrect operation lock in isometric view,

Fig. 2 u. 3

2 shows an enlarged view of the maloperation lock according to FIG. 1 in the blocking basic position in a longitudinal section or a side view,

Fig. 4

an isometric representation of the drive rod drive with the maloperation lock and an associated stop in an isometric representation,

Fig. 5 u. 6

the maloperation lock with the associated drive rod drive in an unlocked position in a longitudinal section and a side view,

Fig. 7

an isometric representation of the drive rod drive with the maloperation lock during its assembly,

Fig. 8

the drive rod drive and the maloperation lock according to FIG. 7 in a longitudinal section,

Fig. 9

an isometric view of the drive rod drive with attached maloperation lock and an associated stop in a further embodiment, and

10, 11, 12

different configurations of the attack.

1 shows a partial section of a drive rod drive 3, which has a faceplate 1 and comprises a drive rod 2 which is guided in a longitudinally displaceable manner on the rear side thereof. The Driving rod 2 is guided longitudinally relative to the faceplate 1 and can be move into several, for example three, different sliding positions, of which each corresponds to a very specific switching position of the drive rod drive 3. at a drive rod drive 3, for example as a drive for one Espagnolette fitting of a turn-tilt window or turn-tilt door is used, the first switching position preferably corresponds to the closed position for the wing, the second switch position is assigned to the turn-open function for the wing while the third switch position determines the tilt opening function for the sash.

In many cases it is desirable or even at least one of the two conditions Opening function of the sash determines the switching positions of the connecting rod 2, with tilt-and-turn windows or doors regularly assigned to the turn-open function Switch position to block automatically as soon as the leaf comes out of its closed position Opening direction is moved. On the other hand, this blocking - also automatically - be lifted again as soon as the sash moves out of the open position its closed position is transferred to the fixed frame. This serves the purpose a maloperation lock 4, which is immediate in the illustrated embodiment is arranged on the housing 5 of the drive rod drive 3. As a carrier for this Operating lock 4 becomes the faceplate 1 of the drive rod drive 3 used.

2, the malfunction lock 4 consists of a parallel to the Wing plane pivotally mounted two-armed lever 6, the first lever arm 7 on its underside carries a locking cam 8, the at least one locking catch 9 in the Drive rod 2 is assigned. With its longitudinal web 10, the lever arm 7 extends through the two-armed lever 6 a narrow longitudinal slot 11 (Fig. 8) of the faceplate 1. The Lever 6 is supported on its lower edge 6b like a rocker on the faceplate 1, whereby a second lever arm 12 - spaced from the faceplate 1 - protrudes. The bottom edge 6b of the lever 6 is in the area assigned to the faceplate 1 with two in one provide obtuse angles to each other bounding edges 6b. This Boundary edges 6b form a rocker bearing, the lever 6 on the one hand by the claw-like receptacle in the leaf spring 13 and the other by the inclusion in the Longitudinal slot 10 of the faceplate 1 against tilting perpendicular to the plane of the drawing is secured. In the longitudinal direction of the faceplate 1, the lever 6 is on the one hand by a Support of the bolt 6a and / or on the other hand by a hook-like engagement of the Edge 6c secured in the longitudinal slot 10. The first lever arm 7 is by a Energy storage, the leaf spring bent in the illustrated embodiment as a U-shaped 13 is executed and which with a free leg 13a on the housing or Cap 14 supports, in the illustrated locking position of the locking cam 8th with force.

The other leg 13b of the leaf spring 13 abuts the lever 6. This is the thigh 13b provided with a longitudinal slot, which is made of a flat material such. , by Stamping - the lever 6 grips like a claw. In the lever 6 is a bolt 6a provided that serves the leg 13b as a support. The bolt 6a can alternatively can also be made in one piece from the lever 6.

A slide 16 is assigned to the second lever arm 12 as the actuating element 15 with its wedge-shaped end 17 abuts a bead 18 of the lever arm 12.

The slide 16 projects with its free end 19 in front of the two-armed lever 6 comprehensive cap 14, as can be seen in particular in FIG. 3.

If the wing is closed, the free end 19 of the slide 16 acts with the Example arranged on the frame side stop 20 together, such as in the Figures 4 and 5 shown. The stop 20 is with a run-up slope 21 provided so that in the longitudinal section along the longitudinal central axis 5 between the blunt free end 19 and the stop 20 a little Distance sets because the side edge of the free end 19 of the slider 16 on the Stop slope of the stop 20 is present.

In the position of the slider 16 shown in FIG. 5, the lever 6 is under the influence of the in the cap 14 penetrated slider 16 or its interaction whose wedge-shaped end 17 is pivoted with the bead 18, so that the locking cam 8 is led out of the longitudinal slot 11. It is about the rocker-like storage of the lever 6 when pivoting clockwise, the leaf spring 13 clamped, as in Fig. 5 visible.

From the combination of Figures 2 and 5 it follows that the Actuating element 15 or the slider 16 by means of those acting as energy stores Leaf spring 13 is shifted into the locking position of the locking cam 8 shown in FIG. 2 and thereby blocking movement of the drive rod 2.

The provision of the slide 16 from the unlocking position shown in FIG. 5 in the in Fig. 2 locking position can be an additional spring element take place, which acts on the slider 16 and for example also for guidance in the cap 14 is used. Alternatively, the provision can also be effected by that the lever 6 is reset via the leaf spring 13, with the action of the bead 18 on the wedge-shaped end 17 has a sufficient restoring force on the Slider 16 acts.

The assembly of the maloperation lock 4 on the drive rod drive 3 is based on the Figures 7 and 8 in connection with Figures 2 and 5 clarified. On the cap 14 is A hook extension 28 is provided on the underside, which fits into a slot 29 of the faceplate 1 is indentable. The cap 14 lies with its edges 30 on the carrier - that is Forend rail 1 on - with a lateral recess of the forend rail 1 accordingly the length of the housing 5 of the drive rod drive 3, as can be seen in FIG laterally projecting edges of the cap 14 can be engaged (see also FIG. 3). In this case, the cap 14 is at least in regions following the edges 30 with a provided a bottom wall or web 31, the one Forms a support for a leg 32 of the leaf spring 13.

The end 33 of the cap 14 opposite the hook extension 28 is provided with a Provide holding device which in a recess 34 of the faceplate 1st is lockable and engages behind the side edges 35 of the recess 34. That’s it End 33 provided with a pivotable bolt 36 which is asymmetrical to the Has extension 37 extending axis of rotation. The recess 34 is in the essentially keyhole-shaped, ie has a circular cross-section with a adjoining rectangular extension. The latch 36 points in the area of its extension 37 has an essentially complementary shape, so that the Extension 37 in the rectangular extension of the circular cross section of the Recess 34 can be inserted, but after pivoting the side edges 35 of the Recess engages behind 34. This allows the misuse lock 4 in essentially assemble by first using the hook attachment 28 in the Slot 29 is placed, which thereby already a pivot bearing for the Misuse lock 4 forms. So then the misuse lock 4 - starting 8 - counterclockwise onto the faceplate 1 pivoted until the bolt 36 passes through the recess 34 and by means of a tool engagement 38 attached to the front on the bolt 36 is pivoted. As a result, the maloperation lock 4 can be easily connected to a already mounted drive rod drive 3 mountable, because with the exception of Hook extension 28 is not to be carried out by moving parts, which is not is accessible from the front.

From Fig. 8 it is also clear that in addition to the lock 9 another Locking 40 is provided, which corresponds to the position of the drive rod 2, in which the Espagnolette fitting assumes the tilt-open position.

Fig. 9 shows an embodiment in which the free end of the slide 16 and the Actuating element 15 is designed as a locking means 41, which with a stop 20 provided counter-locking means 42 cooperates. The locking means 41 is there from a catch recess in the form of a flat trough 43 and the counter-catch means 42 from a complementary locking projection 44.

If the maloperation lock is in the position shown in FIG. 9, then the Locking projection 44 in the trough 43 and prevents an opening movement of the Wing. Only when moving over the sloping run-up edges of the locking projection 44 with simultaneous elastic deformation of the leaf spring 13 by the moved back slider 16, the wing of the window or door is released. As a result, the malfunction lock 4 also acts as a catch with one Swing open position of the wing also in the turn-open position Espagnolette drive 3 can be avoided.

The function described above assumes that the slide 16 to the Unlocking the locking means 41 from the counter-locking means 42 additionally necessary stroke can exercise or execute. This also creates additional scope for the Leaf spring 13 inside the cap 14 ahead.

It can also be provided that the slide 16 and / or the stop 20 consists of elastic materials. Preferably, at least that is frame-side stop formed from a molded plastic part, so that its Manufacturing can be done in a cost-effective manner. Expediently it also provided that the necessary adjustments to the profiling of the This takes place.

10, 11 and 12 show configurations of the stop 20. The one in FIG. 10 Stop 20 shown is corresponding to the type already described in FIG. 9 and Formed way and has a locking projection 44 which is a bar on the entire height of the stop 20 extends. The locking projection 44 is on one Shaped part 50 is provided, which in a circumferential taper 51 of a U-shaped Clasp 52 is encompassed. On the open side of the U-profile of bracket 52 are on the legs 53 - which protrude above the height of the molded part 50 - locking hooks provided that are not visible here. Furthermore, in the legs 53 are inward protruding locking devices 54 are provided, which in corresponding - not here visible side openings of the molded part 50 engage, so that the clamp 52 and the molding 50 are attached to each other.

In a threaded bore of the molded part 50, a threaded bolt 56 is seated, which is with his head 57 against the side edges of a bore 58 of the bracket 52.

Via a tool engagement 59 provided in the head 57 of the threaded bolt 56 the molding 50 move relative to the bracket 52. Threaded bolt 56, bracket 52 and molded part 50 together form a clamping device, by means of which the stop 20 on one, for example attached to the frame bearing or another Fitting part that can be attached. All that is necessary for this is that the clamp 52 via a corresponding fastening section of the bearing or the fitting part - Which is opposite the maloperation lock - is clipped on and by means of the Clamping device is clamped on this. In doing so, they engage behind in FIGS. 10 to 12 not visible locking hooks on the free ends of the legs 53, for example a rectangular cross-section of the bearing attached to the frame or the faceplate a drive rod drive, which carries the maloperation lock Driving rod drive is opposite. This is the case, for example, if the Wing is designed as a so-called sash that next to a moving wing, the Espagnolette drive 3 carries, has a sash. The sash one double-leaf windowless timber is generally moved and folded using a rebate mechanism unlocked, which is opposite the drive rod drive 3. Usually it is Attaching the stop 20 to such a folding gear with special Difficulties connected, because according to the exact location of the Mishandling device must be provided with appropriate fastening openings. By means of the clamp 52, the stop 20 on the faceplate of the Fasten the folding gear, the clear distance 60 of the legs 53 to the width of the Face plate of the rebate gear is matched. Reach behind the legs 53 attached hooks on the underside of the faceplate, can be moved lengthways a precise alignment of the stop 20 is made along the faceplate become. Once the appropriate position has been determined, the threaded bolt 56 can be used Stop 20 are fixed in position on the faceplate of the folding gear. Should he Stop 20 on a single-leaf window or the like. Are used either the bracket 52, as well as the threaded bolt 56, removed and the stop 20 over the bore thus cleared using a fastening screw provided for this purpose fixed to the frame or the camp has a corresponding receptacle, which in essentially corresponds to the dimensions of the faceplate of the folding gear.

11 are already shown in FIGS. 9 and 10 Existing bevels 61 extended until the with the operator lock cooperating section of the stopper is almost inversely V-shaped. This form of the stop 20 is not suitable for a locking engagement of the slide 16, but can interact with this through the longer run-up phase improve significantly.

In the embodiment of the stop shown in Fig. 12 is the locking projection laterally offset to the central axis 62 of the stop 20. This central axis 20 lies in the closed position of the wing congruent with a central axis of the Driving rod drive 3. The offset position of the locking projection 44 is a Keep the wing in a slight opening position of the wing, so that a little air exchange between the outside of the building and the inside of the room can be done. This opening condition known as the night ventilation position allows it also that the opening position of the wing is recognizable, for example in Balcony doors can be beneficial.

Finally, it should be mentioned that the clamp 52 of the stop 20 is preferred consists of a sheet of spring steel. On the one hand, this is the one for clipping on the bearing or the faceplate of a folding gear necessary elasticity of the legs 53 reached. On the other hand, the required strength is given, although the The space used is extremely small. The legs 53 can therefore the faceplate 53 of the rebate gear, even when it is seated in a hardware groove.

LIST OF REFERENCE NUMBERS

1

faceplate

2

driving rod

3

Driving rod drive

4

Tampering device

5

casing

6a

bolt

6b

boundary edge

7

lever arm

8th

locking cam

9

Sperrast

10

longitudinal web

11

longitudinal slot

12

lever arm

13

leaf spring

13a

leg

13b

leg

14

cap

15

actuator

16

pusher

17

wedge-shaped end

18

bead

19

The End

20

attack

21

approach ramp

28

hook projection

29

slot

30

margins

31

web

32

leg

33

The End

34

recess

35

margins

36

bars

37

extension

38

tool engagement

39 40

Sperrast

41

latching means

42

Securing means

43

trough

44

catch projection

50

molding

51

Verjünger

52

clip

53

leg

54

detents

55

clamping device

56

threaded bolt

57

head

58

drilling

59

tool engagement

60

distance

61

bevels

62

central axis

Claims (13)

Incorrect operation lock for espagnolette fittings with espagnolettes that can be moved into several switch positions,
Consisting of a lever (5) pivotably mounted on the wing parallel to the wing plane, which carries a locking cam (8) to which at least one locking latch (9) on the drive rod (2) is assigned, into which the locking cam (8) is in a predetermined switching position the drive rod (2) and when the sash is open, by means of a force accumulator (13), namely a leaf spring, engaging the lever (5), while in the closed position of the sash the lever (5) counteracts the effect of the energy accumulator (13) by a Adjustable stop and its locking cam (8) can be disengaged from the locking catch (9) of the drive rod (2),
wherein the lever (5) is designed as a two-armed lever, the first lever arm (7) of which carries the locking cam (8) on its underside,
the two-armed lever (5) being accommodated in a housing or a cap (26),
characterized in that the other lever arm (12) is associated with an actuating element (15) which is displaceable along the drive rod (2) and acts pivotally on the lever arm (6). Maloperation lock according to claim 1, characterized in that the actuating element (15) consists of a slide (16) with a wedge-shaped end (17), the free end (11) of which projects in front of a cap (14) comprising the two-armed lever (6) which the slide (16) is guided and is assigned to the triggering stop. Maloperation lock according to claim 1 or 2, characterized in that the wedge-shaped end (17) cooperates with a bead (18) arranged on the end of the lever arm (12). Maloperation lock according to one of claims 1 to 3, characterized in that the actuating element (15) or the slide (16) is acted upon by a force accumulator (13) in a position such that the first lever (7) with its locking cam (8) a movement of the drive rod (2) blocks. Maloperation lock according to one of claims 1 to 4, characterized in that the energy store is formed by the leaf spring (13) which acts on the wedge-shaped end (19) via the second lever arm (12). Maloperation lock according to one of claims 1 to 5, characterized in that the cap (14) is arranged directly on the housing (5) of a drive rod drive. Mishandling device according to one of claims 1 to 6,
in which the cap (14) with its edges (30) on the carrier, for. B. the faceplate (1),
the cap (14) having on its underside a hook extension (28) which can be inserted into a slot (29) in the carrier, for example the faceplate (1),
and the cap (14) is provided, at least in regions, following its edges (30) with a wall or a web (31) which forms a support for the free leg of the leaf spring (13) provided as an energy store,
characterized in that at the end (33) of the cap (14) opposite the hook extension (28) there is arranged a holding device which can be locked in a recess (34) of the faceplate (1) and which consists of a faceplate behind the side edges (35) of a faceplate Recess (34) pivotable latch (36). Incorrect operation lock according to claim 7, characterized in that the bolt (36) can be actuated via a tool engagement (38) provided on the front. Incorrect operation lock according to one of claims 1 to 8, characterized in that the actuating element (15) has a latching means (41) which interacts with a counter-latching means on the stop (20) to lock a pivot opening position of the wing. Incorrect operation lock according to claim 9, characterized in that the latching means (41) consists of a latching recess and the counter-latching means (42) consists of a latching projection (44) designed to be complementary thereto. Maloperation lock according to one of claims 9 or 10, characterized in that the stop (20) consists of a molded plastic part. Maloperation lock according to one of Claims 1 to 11, characterized in that the stop (20) is fastened to a bearing attached to the frame or to a fitting part opposite the malfunction lock (4) by means of a clamping device (55). Maloperation lock according to one of claims 9 to 12, characterized in that the latching projection (44) is laterally offset from a position of the latching recess which results in the closed position of the wing.

Images