EP0992644B1 - Bolt latch for mounting in a thin wall - Google Patents

Abstract

The bolt is displaceably located against spring force in relation to the thin wall (12). The bolt is formed by a second trough (18) which is displaceably located in the first trough (14) held in the first trough in the thin wall and against the force of a spring (20). The first trough has a nose formation (26) projecting over the outer wall plane (24). The nose formation, when the first trough is pressed into the cut-out (16) of the thin wall, can be switched back in the wall plane against spring force, forming a surface (30) which clamps on the inner surface or edge of the cut-out.

Description

The invention relates to a latch closure for mounting in a provided with a rectangular cutout thin wall, such as metal door, which latch closure comprises a first rectangular and shaped handle recess with a bottom and side walls that it can be latched in the rectangular cutout in the thin wall, and a latch and a second recessed grip with a bottom and as a (first) background surface for displacing the second recessed grip against the force of a spring serving side wall slidably supports, wherein the first recessed grip on at least one of the side walls has a protruding over the outer wall plane nose , which can shrink when pressing the first recessed grip in the cutout of the thin wall in the wall plane against spring force and forms a surface that can create close to the impressions to the inner surface or edge of the cut-clamping, the first recessed grip on the bolt the side facing wall forms an opening through which the bolt extends through slidably, wherein the first recessed grip forms a cover which projects outwardly on all sides over the side walls of the first recessed grip so that it is in the cutout in the thin wall on the Edge of the cut rests.

Such a bolt closure is substantially known from WO 98 30 774 A.

Such a bolt lock can be engaged in a correspondingly dimensioned opening of a door panel, whereupon then the door or flap can be closed, wherein the bolt lays behind a frame or a frame to which the door is hinged. When you press the door or flap, a bolt moves within a housing against the force of a spring, which occurs automatically due to the inclined surface of the bolt when you press the door or flap this sliding movement. As soon as the bolt passes behind the frame or the frame, the spring pushes the bolt in the opposite direction and thereby locks the door to the door frame. The disadvantage here is that the intended for receiving the forces when opening the door surface appears suitable only to a limited extent as Hintergrifffläche. There is a risk that slips in the binding of the door or the flap or the window of the fingers of the inclined surface.

Further, reference is made to US 5,671,958. In this document, it is disadvantageous that the direction of the shutter opening is different from the direction of opening the door panel or the like, and thereby u. U. two hands are needed to operate. In addition, the closure can only be used in the corner region of a door leaf or the like.

The closure described above has the advantage that it can be mounted in a door leaf, without the rear side would have to be accessible. In other known closures for sheet-metal doors or flaps, the assembly requires accessibility of the rear side of the door leaf to set a front-inserted through a corresponding opening in the door leaf closure on the rear by means of a nut or an attachable spring member.

Another advantage of the prior art is that the latch is supported by a trough held in the first (outer) trough in the thin wall against spring force slidably mounted second (inner) recessed grip is formed.

By this measure, the mobility of the bar carrying the trough is no longer affected by the thickness of the sheet holding the outer trough, but the arrangement can be such that it can be securely fastened in thin walls with a relatively large variation in wall thickness.

In order to hold this first, outer trough in the rectangular opening of the wall, such as door leaf, the trough on the side wall facing away from the latch on the outer wall plane projecting nose, which recede against the spring force when depressing the trough in the sheet metal section in the wall plane can and forms a tip of the nose, which creates clamping after pressing against the sheet-metal wall inside. By this feature, the trough in the rectangular section of the thin wall can be snapped in from the front, without the rear of the thin wall would have to be accessible. The trough does not need in the rectangular cutout, as also described in the prior art, see the Fig. 1-15, to be displaced, so that with relatively large spring forces and friction values, the trough can be held in the wall, which the stability of Arrangement benefits.

The fact that the second trough is slidably mounted in the first trough against spring force, it can be achieved that optimum mobility is ensured by a largely backlash, but sufficiently slidable storage is ensured. The second trough, which can be slidably received within the first trough, can be exchanged if necessary, for example, to allow an adaptation of the latch return to different thicknesses of the door frame. Likewise, if necessary, the first (outer) trough can be exchanged if very different door strength ranges are to be detected.

The first trough forms a lid which protrudes on all sides beyond the side walls of the trough and rests after insertion of the trough in the opening in the thin wall on the breakthrough edge. Through these measures, the possibly sharp-edged rectangular cutout covered. The bottom of the first outer trough or bar may, as shown in Figure 31 of the prior art, have an aperture into which an extension projecting from the bottom of the second inner trough extends so as to allow the thrust movement of the second inner trough in the first one. limited to outer trough. In this way it is avoided that the bolt by z. B. the spring force u. U. is completely pushed out of the first, outer trough.

The object of the invention is to develop a bolt closure of the type mentioned in that it is easier to operate while maintaining the above advantages.

The object is achieved in that the latch is integrally formed by the second trough, and that the lid has an opening for passage in the second recessed grip, which opening is arranged such that it is displaced against the force of a spring second recessed grip a second , in the lumen of the first recessed grip reaching into the rear lid surface formed by the lid for opening the metal door makes or forms.

It then needs no additional handle to open the door (which might even the second hand would be necessary) are provided. Rather, the finger, which pushes the second trough back into the unlocked position, possibly after the unlocking movement, engage behind this rear grip surface and exert tensile force for pivoting the door open.

According to a further development, the first recessed grip forms at the upper end of the side wall facing away from the latch an edge that extends into the lumen of the first well as far as that, when moved against the force of a spring second recessed grip the second, extending into the lumen of the first recess Hintergrifffläche Opening the metal door or the like. Is formed. (Claim 2).

The two opposing side walls of the first recessed grip, which expediently form a sliding guide for the second recessed grip, according to a development on two perpendicular away from the lower level of the lid leading incisions which enclose a tongue with holding surfaces, which are close to the lower level of the lid pass. In this way, a retaining lug is present on both sides of the first recessed grip, which benefits the stability of the arrangement. (Claim 3).

Alternatively, however, the side wall of the first recessed grip opposite the latch can form perpendicularly away from the plane of the lid incisions enclosing a tongue that extends to near the lower level of the lid. In this case, the attachment takes place at a different location, but also can ensure sufficient stability. (Claim 4).

This is especially true when the first recessed grip on the side facing the latch two of the front ends of the two perpendicular side walls obliquely upwards in the direction of the thin wall extending lugs forms close to the plane of the thin wall and between them the second Sliding handle grip. These approaches are the oblique insertion of the trough in the neckline to the rear surface of the thin wall, thus ensuring a secure grip at this point, resulting in a high stability of the arrangement. (Claim 5).

These approaches can be made suitably compliant, so as to allow adaptation to different sheet thicknesses to a certain extent.

Similarly, an adaptation to different sheet thicknesses can be realized that the free end of the tongues forms such a skew, which may also have a corrugation, that this bevel applies to the lower breakthrough edge of the opening in the thin wall and the first recessed grip thereby in the breakthrough also then securely locked when the strength the thin wall turns out differently. (Claim 6).

It is favorable if between the outer surface of the wall remote from the latch wall of the second recessed grip and the inner surface of the bolt facing away from the wall of the first recessed grip a compression spring, such as coil spring is arranged. In this way, namely, the second recessed grip is pressed into its closed position, so that the latch works like a door latch (claim 7). In order to hold the spring in place, it may be advantageous if from the outer surface of the wall facing away from the latch wall of the second recessed grip a projection for receiving one end of the coil spring is provided (claim 8). This approach may have a round shape, or, which is favorable for injection-technical reasons, represent a cross in cross section.

An approach projecting from the bottom of the second recessed grip and extending into an opening in the first recessed grip expediently has, in longitudinal section, the shape of a ramp whose oblique ramp line is directed away from the latch. This means that the two recessed grips can be mounted inside each other without the need for special handling, but then locked into each other, so that they can not fall apart during transport or installation in a door leaf. (Claim 9 and claim 10).

The spring, which supports the latch action of the bolt, can also serve to support the tongue, which holds the first recessed grip inside the thin wall, so that the risk is reduced that their spring force is reduced too much over time, which in some plastics could be the case (claim 12).

The invention will be explained in more detail by means of exemplary embodiments, which are illustrated in the drawings.

• Fig. 1A, 1B, 1C und 1D
  einen erfindungsgemäß ausgestalteten Riegelverschluß in Verbindung mit einem Türblatt in verschiedenen Montagestellungen;
• Fig. 2A, 2B und 2C
  in drei verschiedenen Ansichten die erste (äußere) Mulde des Riegelverschlusses gemäß Fig. 1 A bis 1D, welche Mulde das äußere Gehäuse bildet;
• Fig. 3A und 3B
  in zwei verschiedenen Ansichten die zweite (innere) Mulde, die den Riegel bildet;
• Fig. 4A, 4B und 4C
  in drei verschiedenen Ansichten eine alternative Ausführungsform des Riegelverschlusses;
• Fig. 5
  in einer Seitenansicht den Riegelverschluß gemäß Fig. 4A bis 4C während des Einbauvorganges;
• Fig. 6
  eine perspektivische Ansicht der ersten äußeren Mulde (Gehäuse) des Verschlusses gemäß der Fig. 4A bis 4C; und
• Fig. 7
  eine perspektivische Ansicht der zweiten (inneren) Mulde des Riegelverschlusses gemäß der Fig. 4A bis 4C.

It shows:

• Figs. 1A, 1B, 1C and 1D
  a inventively designed latch closure in conjunction with a door leaf in different mounting positions;
• Figs. 2A, 2B and 2C
  in three different views, the first (outer) trough of the latch closure of Figure 1 A to 1D, which trough forms the outer housing.
• FIGS. 3A and 3B
  in two different views, the second (inner) trough forming the bar;
• Figs. 4A, 4B and 4C
  in three different views an alternative embodiment of the latch closure;
• Fig. 5
  in a side view of the latch closure according to Figures 4A to 4C during the installation process.
• Fig. 6
  a perspective view of the first outer cavity (housing) of the closure according to FIGS. 4A to 4C; and
• Fig. 7
  a perspective view of the second (inner) trough of the latch closure according to FIGS. 4A to 4C.

In Fig. 1A, a latch closure 10 can be seen, which can be mounted in a thin wall, such as metal door 12 or flap, wherein the latch closure 10 from a first, outer recessed grip 14, which can be latched into a rectangular cutout 16 in the thin wall 12 is, and a second, inner recessed grip or locking device 18 which in the first, outer recessed grip 14 against the Force of a spring 20 in and against the direction of the arrow 22 (Fig. 1C) is slidably mounted.

The outer recessed grip or the housing 14 has, according to FIG. 1A on the right side shown there on the outer wall plane 24 projecting nose 26, which upon depression of the trough 14 in the cutout 16 of the thin wall 12, see the arrow 28 in this Wall plane 24 against the force of a spring, this can also serve the spring 20, can retreat and which forms a nose surface 30 which presses against the rear surface or the edge of the cutout 16 of the thin wall 12 after pressing in, as shown in FIG. 1B can be seen. The first trough or housing 14 forms an opening 32 (see also FIG. 2C) on the left-hand side of FIG. 1A, from which the locking device 18 protrudes, through which the second or inner recessed grip 18 passes. The first recessed grip or the housing 14 further forms a cover 34 which projects over the side walls 36, 38, 40, 42, see Figs. 2A, 2B and 2C, respectively, so that after the introduction of the housing 14 in the cutout 16 of FIG. 1A covering this edge projecting edge cover the edge of the cutout 16, as Fig. 1B can be clearly seen.

The lid 34 further has an opening 44 which is sufficiently large to communicate with z. B. pass a finger and to allow a penetration into the second, inner trough or latch member 18, ie in the designated in Fig. 3A with 46 recess interior. The arrangement of the opening 44 in the cover 34 is such that the rear trough wall 48 is located in the region of this opening 44 according to FIG. 1B and can therefore be touched with the passage of a finger and pressed against this wall 48. By this pressure, the second trough 18 within the first trough 14 slidably displaced against the force of the spring 20 until the position shown in FIG. 1C is reached. At this moment, the rear, lower outer edge 50 of the second trough 18 abuts against the slightly inclined lower inner wall 52 of the first trough 14, whereby a stop in the movement in the direction of arrow 22 is formed.

As a result of this displacement, the latch 54 is released from a rear surface 56 formed by a door frame 58 or the like. Thus, the door leaf 12 from the door frame 58 (or the flap 12 from a machine housing 58 or the like.) Take out or swing out, as shown in FIG. 1D with the arrow 60.

Conveniently set the size and location of the opening 44 in the lid 34 so firmly that a projecting into the lumen of the trough 14 bar 43 is formed, which forms a Hintergrifffläche 41 for opening the door 12 or the like., Which at least - and expediently only then - is accessible when the second trough 18 is located within the first trough 14 in the zurückgewichenen position shown in FIG. It is sufficient if the strip has a Hintergriffflächenbreite B, see Fig. 4A, which makes up about half of the stroke H, that is the path of movement of the second trough within the first trough, which is limited by stop 52 and 90. Has proven itself - at z. B. Dimensions of the arrangement in the range of 25 ... 30 mm cover width, 50 ... 60 mm cover length - one stroke H = 5 ... 7 mm, z. B. H = 6 mm, whereby the dimension B would be 3 mm. The depth of the hollows should be between 10 and 15 mm in order to reach comfortably. The dimensions in Figures 4A, 4B and 4C are nevertheless only an example.

When the door 12 is pushed, the bevel 62 of the latch 54, which bears against the edge 64 of the door frame 58, allows the second recess to be pushed back automatically against the force of the spring, whereupon the second recess or latch is activated by the force of the spring 54 is pushed into the position shown in Fig. 1B, whereby the door is closed.

For the smooth movement of this pushing movement in the direction of the arrow 22 or opposite to this arrow, the two opposite side walls 36, 38 of the first trough 14 form a sliding guide for the second inner trough 18, by the inner surfaces of the side walls 36, 38 of the first, outer trough to the outer surfaces of the respective side walls 66, 68 of the second inner trough 18 (see Fig. 3B) attack. The from the front ends The walls 36, 38 of the first, outer trough 14 formed remaining "sidewalls" 42 carry obliquely upward in the direction of the thin wall 12 extending lugs 70 which terminate near the lower level 72 of the thin wall and thereby the first, outer trough 14th hold within the cutout 16.

1, the oblique insertion of the first depression 14 into the cutout 16 and the subsequent pivoting in the direction of the arrow 28, see FIG. 1B. It is advantageous if in this pivoting operation of the projection 70 is pressed slightly resiliently down so as to form a non-positive, a certain pressure-performing holding device for the first trough 14. By this spring effect results in a desired adaptation to the possibly different thicknesses of the thin wall 12, which may for example be between 0.8 mm and 2.3 mm. On the opposite wall plane 24, the inclined surface 30 ensures an adaptation to different wall thicknesses of the wall 12, by depending on the wall thickness, the surface 30 pivots more or less strongly due to its own spring action to the outside. The holding action of the nose surface 30 can be supported by a corrugation formed on it, which is indicated by the reference numeral 76 in FIG. 2C.

To give the nose 26, the spring action described above, the wall 40, which is opposite to the latch bolt 54, provided with two vertically away from the plane of the lid 34 incisions 78, 80, as shown in FIG. 2B, so that a at the bottom 82 of first trough 14 attached tongue results, which unfolds due to the material (plastic) spring action and thereby at the upper end of this tongue, which carries the nose 26, allows to retreat into the interior of the first trough 14, thereby inserting the first trough 14 in the Section 16 of the thin wall 12 as shown in FIG. 1A to allow. To hold the coil spring 20 of FIG. 1A in the position shown, for example, a remote from the latch bolt 54 wall 84 outgoing approach 86, on which the coil spring 20 can be plugged fit. The approach 86 is here for injection molding technical reasons equipped with a cross-shaped (instead of circular) cross-section.

The other end of the coil spring 25 is supported on the inner surface of the wall 52 of the first, outer trough 14, and, as already mentioned, in the region of the tongue which carries the nose 76, whereby their spring action is supported, they due already has their material properties, as described.

As a result, a decrease in the material-spring action due to material fatigue is counteracted.

The bottom 82 of the first, outer trough 14 has an opening 88, the edge of the trap 54 directed edge 90 with a protruding from the bottom 86 of the second, inner trough 18 approach 92 cooperates such that the thrust movement of the second inner trough 18 within the first, outer trough 14 in the direction of the latch 54 is limited to (opposite to the arrow 22 of Fig. 1C) in a position which can be seen in Fig. 1B. This ensures that the second, inner trough 18 does not slide out of the first outer trough 14 completely. Conveniently, the lug 92 is configured in longitudinal section in the form of a ramp, wherein the inclined ramp line is directed away from the latch 54. This allows easier insertion of the second inner trough 18 into the first outer trough 14 when the latch closure is assembled. The shape of the trap 54, in particular the recess or receiving area 94 formed by this trap 54, see FIG. 1C, can be adapted to the thickness of the frame 58. In particular, it is possible to keep second inner troughs 18 with different shape of the incision 94 in stock and to combine them with the first, outer trough 14 as required. For different thicknesses of the frame 58 then a uniform larger shape of the first, outer trough 14 is operational, are introduced into each of which differently shaped second, inner troughs 18.

While the cup-shaped member 46 of the second inner trough 18 mounted within the first outer trough 14 has thin, e.g. plastic sprayed, walls, the trap 54 is formed by the bottom 86 continuing forward, jumping downwards Slant 54 forms, then forms the return area for receiving the frame 58 and finally into a straight surface 96 merges, which then jumps back at 98 in adaptation to the skew of the lugs 70, see Fig. 1B. To reinforce this often bent parts is a perpendicular thereto inner wall 100th

FIGS. 4A to 4C show an alternative embodiment in which fastening tongues with chamfered nose surfaces 130 start from the side walls 136, 138. Otherwise, the arrangements are similar, as already described.

Claims (12)

1. Bolt latch (10) for mounting in a thin wall (12), such as a sheet metal cupboard door, provided with a rectangular slot (16), which bolt latch (10) comprises a first rectangular recessed grip (14) having a bottom (82) and side walls (36, 38, 40, 42) which is configured in such a way that said recessed grip can engage in the rectangular slot (16) in the thin wall (12), and which displaceably supports a bolt (54) as well as a second recessed grip (18) having a bottom (86) and a side wall (48) serving as an engaging surface (48) for displacing the second recessed grip (18) against the force of a spring (20),
   with the first recessed grip (14) having a nose (26) which projects beyond the outer wall plane (e.g. 24) on at least one of the side walls (36, 38, 40), said nose being able to retreat into the wall plane (24) against spring force on pressing the first recessed grip (14) into the slot (16) of the thin wall (12) and forming a surface (30, 130) which can come to rest in a clamping manner on the inner surface (72) or edge of the slot (16) following pressing in,
   with the first recessed grip (14) forming an opening (32) on the side facing the bolt (54) in the side wall (42), through which opening the bolt (54) displaceably extends,
   with the first recessed grip (14) forming a cover (34) which projects outwardly on all sides beyond the side walls (36, 38, 40, 42) of the first recessed grip (14), such that following pressing of the first recessed grip into the slot (16) in the thin wall (12) said cover rests on the edge of the slot (16),
   characterised in that
   the bolt (54) is integrally formed by the second trough (18),
   and in that the cover (34) has an opening (44) for penetrating the second recessed grip (18), which opening (44) is disposed such that, when the second recessed grip (18) is displaced against the force of a spring (20), it makes accessible or forms a second engaging surface (41) for opening the sheet metal cupboard door (12), which is formed by the cover and extends into the internal diameter of the first recessed grip.
2. Bolt latch as claimed in Claim 1, characterised in that the first recessed grip (14) forms an edge (43) at the upper end of the side wall (40) facing away from the bolt (54), said edge extending into the internal diameter of the first trough (14) so far that, when the second recessed grip (18) is displaced against the force of a spring (20), the second engaging surface (41) extending into the internal diameter of the first trough for opening the sheet metal cupboard door (12) or the like is formed.
3. Bolt latch as claimed in any one of Claims 1 to 2, characterised in that the two opposite side walls (136, 138) of the first recessed grip (14) form a sliding guide for the second recessed grip (18) and have two recesses leading away perpendicularly from the lower plane of the cover (134), which enclose a tongue (130) with holding surfaces, which holding surfaces extend up to close to the lower plane of the cover (134). (Figs. 4A - 7).
4. Bolt latch as claimed in any one of Claims 1 to 2, characterised in that the side wall (40) of the first recessed grip (14) opposite the bolt (54) forms recesses (78, 80) leading away perpendicularly from the plane of the cover (34), which enclose a tongue (30) which extends up to close to the lower plane of the cover (34). (Figs. 2A - 2C).
5. Bolt latch as claimed in any one of Claims 1 to 2, characterised in that the first recessed grip (14) on the side facing the bolt (54) forms two projections (70) extending from the front ends of the two side walls (36, 38) vertical thereto diagonally upwards in the direction of the thin wall (12), said projections ending close to the plane (72) of the thin wall (12) and slidingly receiving between them the second recessed grip (18) with the bolt (54).
6. Bolt latch as claimed in any one of Claims 1 to 5, characterised in that the free end (30, 130) of the tongue forms an inclined portion which can have a ribbing (76), such that this inclined portion comes to rest on the lower edge of the slot in the thin wall (12) and secures the first recessed grip (14) in the slot (16) in a locking manner.
7. Bolt latch as claimed in Claim 6, characterised in that a compression spring, such as a spiral spring (20), is disposed between the outer surface of the wall (48) of the second recessed grip (18) facing away from the bolt and the inner surface of the wall of the first recessed grip (14) facing away from the bolt (54).
8. Bolt latch as claimed in Claim 7, characterised in that the outer surface of the wall of the second recessed grip (18) facing away from the bolt (54) has a projection (86) for receiving one end of the spiral spring (20).
9. Bolt latch as claimed in any one of Claims 1 to 8, characterised in that the bottom (82) of the second recessed grip (18) has an aperture (88), into which a projection (92) projecting from the bottom (86) of the first recessed grip (14) extends, such that it limits the sliding movement of the second recessed grip (18) inside the first recessed grip (14) in at least the direction towards the bolt (54).
10. Bolt latch as claimed in Claim 9, characterised in that, in longitudinal section, the projection (92) has the form of a ramp, the inclined ramp line of which is oriented away from the bolt (54).
11. Bolt latch as claimed in any one of Claims 1 to 10, characterised in that a second recessed grip (18) having a bolt device (18) adapted to the form of the frame or the like (58) in each case can be inserted into the first recessed grip (14).
12. Bolt latch as claimed in any one of Claims 1 to 11, characterised in that the (compression) spring (20) is supported on the tongue (26) serving to lock the first recessed grip (14) inside the slot (16) and reinforces the spring action thereof.

Images