EP1119675A1

EP1119675A1 - Latch closure

Info

Publication number: EP1119675A1
Application number: EP99947321A
Authority: EP
Inventors: Dieter Ramsauer
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-23
Filing date: 1999-09-11
Publication date: 2001-08-01
Anticipated expiration: 2019-09-11
Also published as: EP1119675B1; DE19981878D2; US6581985B1; DE29817033U1; WO2000017472A1; DE59903683D1

Abstract

The invention relates to a latch closure for walls, doors and shutters which are joined to frames, enclosures or the like by means of hinges. The frame, enclosure, door or wall surfaces which are joined to one another by hinges are essentially flush with one another when in a closed position. The inventive closure is comprised of a first closure housing (12) which can be fastened to the frame or the like and which has a rear-engaging element (14) for receiving the latch (16) of the latch closure (10) in a latching manner. The closure also comprises a second closure housing (18) which can be fastened to the door or the like. The latch (16) is arranged in said second closure housing such that it can be displaced against spring force by means of a handle (58). According to the invention, the second closure housing (18) forms a projection (40) that, when the door is closed, rests on a parallel front face (44) which is essentially parallel to the door plane (42) and which is formed by the first closure housing (12).

Description

Latch lock

Technical field

The invention relates to a latch lock for hinged walls, doors or flaps on racks, housings or the like, in which the frame, housing, door or wall surfaces connected by the hinges in the closed position are essentially flush with one another towards the outside are consisting of a first lock housing which can be fastened to the frame or the like with a rear handle for lockingly receiving the latch of the latch lock, and a second lock housing which can be fastened to the door or the like, in which the latch is displaceably arranged by means of a handle against spring force.

State of the art

Room door locks are usually latch locks, which are, however, built into the door leaf. In the past, it was more common to place such latch locks on the door leaf.

Especially in the latter case, the trap is accessible through the remaining gap when the door is closed and with a suitable tool, such as a screwdriver, it is possible to push the trap back and open the door, even if the actual actuation pulls the trap back should be locked. This is a major disadvantage of the known latch locks, which is particularly troublesome when it comes to the doors of switch cabinets, the interior of which must be protected against unauthorized manipulation, or the interior of which presents a danger to an unauthorized person.

Object of the invention

The object of the invention is to improve the trap closure of the type mentioned in such a way that the trap is better than attempts at manipulation is protected and in particular it is difficult to push back the trap with a screwdriver or similar tool.

In certain applications, such as simply constructed housings, which are intended to close a flap, there is no stop on the door leaf or on the flap or on the housing, so that it may be Difficulty getting the door in the position where the lock snaps into place. A further object is therefore to provide a stop for the door or flap in the closed position in these cases, which is not formed by the door or the housing itself, but by the lock.

Solutions

The object is achieved in that in the case of the latch lock of the type mentioned at the beginning, the second lock housing forms a projection which, when the door is closed, lies on an end face formed by the first lock housing and lying essentially parallel to the door plane.

As a result of this measure, the gap formed between the two closure housing parts of the closure is closed to the outside in such a way that it is no longer possible, for example, to penetrate between the two closure housing parts with a screwdriver and to push them apart and possibly. even push the latch out of its locked position.

Furthermore, it is possible to implement a stop function by means of this projection, which functions independently of the door leaf or the door frame and represents a stop for the door in the closed position. The advantage of this stop - compared to stops which are formed by the door leaf or the door frame itself - is that it enables a more precise position of the stop with respect to the latch and thereby prevents the door from rattling even if there is play between the other stops, for example, due to inaccurate dimensioning of the stops or warping of the door or frame. An additional safeguard against manipulating pushing apart of the closure parts is obtained if a groove is formed in the end face, which extends parallel to the frame, and if a tongue or bar that fits in the groove protrudes from the projection.

For reasons of good frictional engagement, it is favorable if, according to a development of the invention, the rear surface formed by the first closure housing for receiving the trap is parallel to it below the end face.

In the event that the outer surface of the door and frame are not exactly aligned with one another, it may be advantageous if a spacer plate is provided which compensates for this difference in distance.

The latch lock according to the invention is particularly advantageous when the frame or the like on the one hand and the outer contour of the door or the like on the other hand is formed by profile pieces equipped with undercut grooves. A further development of this embodiment is characterized in that the two closure housings then also have undercut grooves in their mounting surface, which, however, preferably run perpendicular to the profile axis and thereby enable favorable adjustability, for. B. also on profiles of different widths. Other fastening options that could be set would be offset threaded holes in the fastening surface in a grid (according to the specified profile widths), or fastening tabs on the sides of the closure housing which have a round opening or an elongated hole running transversely to the profile axis, optionally with locking corrugation. The lever for opening the closure is preferably pivotally mounted about an axis running parallel to the support surface, which axis lies at the height of the shoulder. This shortens the attacking lever arm and thereby increases the stability of the arrangement. The movement path of the handle can be restricted by a nose, which is formed, for example, by a cylinder lock. This allows the lock to be locked. Brief description of the drawings

The invention is explained in more detail by means of exemplary embodiments which are shown in the drawings.

It shows:

Figure 1 is a side view of a latch lock designed according to the invention, mounted on two part of the frame or part of the door forming undercut grooves having profiles.

FIG. 2 is a bottom view of the upper (first) hinge housing part according to FIG. 1 with the associated profile piece;

Fig. 3 is a plan view of the arrangement of Figure 1, with the lock unlocked.

Fig. 4 is a view similar to Figure 3, but with a locked lock and alternative attachment.

Fig. 5 is a top view of the lower (second) hinge housing part of Fig. 1;

6A and 6B are a top view and a side view of a nut (sliding block) used for fastening;

7A and 7B in side view and plan view one for fastening a locking lug (Fig. 10) serving screw;

8 shows a side view of an axle pin;

>

9A, 9B, 9C and 9D in four different views of the case of the latch lock;

10A, 10B, 10C and 10D in different views the locking lug for locking the trap;

11A, 11B, 11C and 11 D in different views the handle of the latch lock according to the invention;

12 shows a detailed view of the handle to explain its articulation;

13 shows an enlarged illustration of the articulation region;

14A, 15B and 14C in three further views the first hinge housing part of the latch lock according to the invention;

Fig. 15 is a sectional view taken along line A-A of Fig. 14C;

16A, 16B, 16C, 16D, 17A, 17B, 17C further views of the second hinge housing part of the latch lock according to the invention; 18 shows a partial representation of the fastening surface of a closure housing with offset threaded bores;

Fig. 19 is a partial view of a mounting tab with a corrugated slot, and

Fig. 20 is a side view of a suitable socket for receiving the head of a fastening screw.

Best ways of carrying out the invention

Fig. 1 shows a side view of a latch lock 10, consisting of a first lock housing 12 with a handle 14 for receiving the latch 16 of the latch lock, which is arranged in a second lock housing 18 against spring force by means of handle 58. The first housing 12 is here mounted on a profile piece 20 which has a rectangular cross section and an undercut groove 22 on each of its four side surfaces. Racks, housings and similar devices can be put together from such profiles, so that the profile 20 is, for example, part of a frame to which a door is hinged by means of hinges. A hinge arrangement as described in the applicant's utility model 297 05 977.7 is used, for example, for the articulated connection of such profiles. Profile piece 24 in Fig. 1 can therefore be regarded as a component of a door that can be pivoted in the direction of arrow 26 to open. The second housing 18 is fastened to this profile piece 24, which forms the closure side of the door. In order to fasten the housing 12 or 18 to the frame 20 or door 24, the base surface 28 or 30 of the first housing 12 or the second housing 18 can be glued and screwed onto the corresponding outer surface of the frame 20 or the door 24 or be welded on. However, the type of fastening chosen here is particularly favorable, in which undercut transverse grooves 32 are introduced into the rear side 28 of the first closure housing 12, into which nuts or slot nuts 34 (FIGS. 6A, 6B) of a suitable shape can be inserted, into which slot nut or nut 34 a fastening bolt 36 can be screwed, which here passes through the profile piece 20, but in other applications, through the wall or the strut of a housing or frame is inserted through it. Bolt 36 thus clamps the housing 12 to be fastened to the profile piece 20 or to the frame by means of the sliding block or the nut 34. FIG. 14A shows that the lower surface 28 of the housing 12 forms two such undercut grooves 32 which are open towards one end, so that an installation which is secure against rotation and can be adjusted perpendicularly to the profile piece extension is possible.

1, the second housing 18 is fastened by means of screw bolts and a sliding block, see in FIG. 17A the undercut grooves 132, which are again open on one side. Because these undercut grooves 132 and 32 are transverse to the axis of the profile pieces 20, 24 run, an adjustment of the distance of the two housings 12, 18 to each other and thus an adaptation to the distance 38 between the two profile pieces is possible, and thus also an alignment of the housing to the profile pieces. In the same way, it is possible to adapt to (usually centrally drilled) profiles with different widths (which are supplied, for example, with a width of 25 ... 50 mm in steps of 5 mm).

Alternatively, the back or mounting surface of the closure housing can be offset - e.g. B. in the 5 mm grid of the available profile widths - arranged threaded holes 133 (Fig. 18).

The gap 38 is now bridged by a projection 40 formed by the second housing 18 which, when the door is closed, as shown in FIG. 1, lies on an end face 44 formed by the first housing 12 and essentially parallel to the door plane 42. The rear surface 14 formed by the first housing 12 for receiving the tongue 16 lies with respect to the projection 40 below this end face 44 and parallel to it, as can be seen in FIG. 1.

The wall area of the first lying between the surfaces 14 and 44 Closure housing 12 is thus largely held free of play between the projection 40 on the one hand and the latch 16 on the other hand. This avoids rattling of the door in the closed state, the projection 40 simultaneously forming a stop for the door 24 on the door frame 20, namely by striking the projection 40 on the end face 44.

The projection 40 also covers the tongue 16 in its entire width, so that manipulation with a tool in the gap 38, see FIG. 3, means that this tongue cannot be pushed back even if, as in FIG. 3, is not prevented by the nose 46 from retreating against the force of the springs 48, so that slamming the door while retracting the latch 16 against the force of the spring is possible. The locked position of the latch is then shown in FIG. 4, in which, through a cylinder lock 50, a component which is plugged onto the square of this cylinder lock and forms the nose 46 and is shown in different views in FIGS. 10A, 10B, 10C and 10D, 4, whereby displacement of the tongue shown in FIGS. 9A, 9B, 9C and 9D is prevented, whereby the nose component 46 by a cap screw shown in FIGS. 7A and 7B on the shaft of the Cylinder lock may be held.

An elongated spring or ledge 54 projects from the contact surface 52 of the projection 40 of the second housing 18 and can be received in an elongated recess 56, see FIG. 14C, formed by the end face 44 of the first closure housing 12, in order to provide additional security against this ensure that the two housing parts 18, 12 are pushed apart when the closed position shown in FIG. 1 is located.

Only when the latch 16 is retracted from the engagement surface 14 by actuating a hand lever 58, that is to say has retracted into its housing 18, can the surface 52 of the projection 40 move away from the surface 44 of the housing 12 and thereby also the projection 54 from the Move back 56 out. Tongue 16 and projection / recess (tongue and groove) (54, 56) thus form a very firm connection between the two closure housings 12, 18 and a strong resistance to unauthorized manipulation.

The already mentioned hand lever 58 is shown in more detail in FIGS. 11A, 11 B, 11 C, 11 D and 12, 13. It consists of a metal or plastic injection molded part and has two laterally opening axial bores 60, into each of which an axial pin 62 can be received after the two legs 64 of the fork-shaped hand lever 58 have been inserted into corresponding receptacles 66 of the housing 18, see FIG. 16A, is recorded. Two axial pins 62 inserted through bores 68 of the housing 18 and received in the blind bores 60 of the hand lever 58 thus enable the hand lever 58 to be pivoted with respect to the housing 18, this pivoting resulting in two lugs 66, 70 proceeding from the hand lever 58 against stop surfaces Press 72 formed by the latch 16 as shown in FIG. 9A. As a result of this pressure, the latch 16 moves in the direction of the arrow 74 and thereby compresses two springs 48 (FIG. 3) which, on the one hand, are received in blind holes 76 in the latch 16 and, on the other hand, are supported on knobs 78, which are supported by the second housing 18 formed and can be seen in Fig. 16A and 16B.

The sectional view according to FIG. 16B of the second housing 18 also shows an opening 80 into which a lock cylinder can be accommodated, on the inner end of which the aforementioned nose device 46 is attached, which in the space 82 formed by the latch 16 according to FIG. 9A is recorded and strikes there at 84 when the cylinder lock is in the locked position, which is indicated in Fig. 4.

FIG. 4 also shows another form of fastening option, namely by means of projecting tab parts 84 with blind or through holes 86, inserted through the fastening screws and allowing the second housing part 18 to be fastened to the frame or door leaf 24.

Alternatively, an elongated hole 186 (FIG. 19) oriented perpendicular to the profile axis can also be provided instead of the round bore 86, which in turn displaces the respective closure housing 18 with respect to the profile 12 enables - even with different profile widths (profiles of the type described here are supplied e.g. in widths from 25 to 50 mm, in steps of 5 mm) to adjust the housing so that it is flush with the profile, as shown in Fig. 1 (gap 38) is shown. The tab with round bore 86 or slot 186 allows the use of a fastening bolt with sliding block, which is inserted into a profile groove 22, you do not need to drill through the profile to insert a fastening bolt 36 (Fig. 1). As shown in FIG. 19, the elongated hole 186 can form a countersunk edge provided with transverse corrugation, into which countersink a bushing 189 (FIG. 20) with suitable corrugation can be received, which in turn receives, for example, the head of the fastening bolt, as in utility model specification 297 10 853.0 of the applicant has already been explained. This results in an adjustable fastening that is particularly well secured against tightening after tightening the screw. However, with screw heads accessible from the outside, the same protection against manipulation as with inaccessible screw bolts according to FIG. 1 or FIG. 18 cannot be achieved. Alternatively, a "bushing" with corrugation and internal thread can also be used, into which a screw bolt is screwed.

Commercial evaluability

The invention is i.a. Can be evaluated commercially in control cabinet construction.

Claims

Patent claims:

1. latch lock (10) for hinged walls, doors, flaps on racks, housings, or the like, in which the frame, housing, door or wall surfaces or the like connected by the hinges or the like in a closed position towards the outside are essentially flush, consisting of a first lock housing (12), which can be fastened to the frame or the like, with a rear handle (14) for lockingly receiving the latch (16) of the latch lock (10), and one on the door. Attachable second closure housing (18), in which the latch (16) is displaceably arranged against the spring force (48) by means of a handle (58),

characterized,

that the second lock housing (18) forms a projection (40) which, when the door is closed, lies on an end face (44) formed by the first lock housing (12) and essentially parallel to the door plane (42), and in the end face (44) a groove (56) is formed, which extends parallel to the frame extension, and that from the projection (40) projects into the groove (56) receptacle bar (54).

2. latch lock according to claim 1, characterized in that the formed by the first closure housing (12) for receiving the latch (16) engaging surface (14) below the end face (44) and parallel to this.

3. latch lock according to one of claims 1 or 2, characterized in that between the outer surface of the door or frame (42) and the housing (18, 12) mounted thereon, a spacer plate is optionally provided.

4. latch lock according to one of claims 1 to 3, characterized characterized in that the frame (20) or the like. on the one hand, and the outer contour of the door (24) or the like. on the other hand is formed by profile pieces equipped with undercut grooves (22).

5. latch lock according to one of claims 1 to 4, characterized in that the two lock housings (12, 18) have undercut grooves (32, 132) in their mounting surface, which run perpendicular to the profile axis.

6. latch lock according to one of claims 1 to 4, characterized in that the two lock housings have in their mounting surface in a predetermined grid - in coordination with different profile widths - staggered threaded holes (133).

7. latch lock according to one of claims 1 to 4, characterized in that the two closure housing fastening tabs (84) each having a round opening (86) or elongated hole (186), the elongated hole extending perpendicular to the profile axis and preferably with an edge with cross corrugation (187) for receiving a head or the thread of the fastening screw receiving an analog corrugated bushing for locking the position of the closure housing with respect to the profile edge.

8. latch lock according to one of claims 1 to 7, characterized in that the hand lever (58) is pivotally mounted about an axis parallel to the support surface (42) (60) which is at the height of the extension (40).

9. latch lock according to one of claims 1 to 8, characterized in that the movement path of the handle (58) is limited by a stopper nose (46) carried by a cylinder lock. CHANGED REQUIREMENTS

[Received at the International Office on March 13, 2000 (3/13/00); original claims 1-9 by; new claims 1 -9 replaced (2 pages)]

1. latch lock (10) for hinged '* walls, doors, flaps on racks, housings, or the like, in which the frame, housing, door or wall surfaces or the like connected by the hinges or the like in Closed position are essentially flush with each other, consisting of a first lock housing (12) which can be fastened to the frame or the like and has a rear handle (14) for lockingly receiving the latch (16) of the latch lock (10), and one on the door od. Fixable second closure housing (18), in which the latch (16) is displaceably arranged by means of a handle (58) against spring force (48), the second closure housing (18) forming a projection (40) which forms when the cover is closed Lays the door on an end face (44) formed by the first lock housing (12), essentially parallel to the door plane (42), and wherein an incision or groove (56) is formed in the end face (44), which is parallel to the frame extends and extends from the projection (40) a bar (54) which can be received in the groove (56), characterized in that the two closure housings (12, 18) have undercut grooves (32, 132) or threaded bores (32) in their mounting surface. 133) or mounting tabs (84).

4. latch lock according to one of claims 1 to 3, characterized in that the frame (20) or the like. On the one hand, and the outer contour of the door (24) or the like. On the other hand, with undercut grooves (22) equipped profile pieces is formed.

5. latch lock according to one of claims 1 to 4, characterized in that the grooves (32, 132) of the two lock housing (12, 18) are perpendicular to the profile axis.

9. latch lock according to one of claims 1 to 8, characterized in that the movement path of the handle (58) is limited by a stopper nose (46) carried by a cylinder lock.