DE4117199A1 - Plastic cover and/or fastening cap for door closure plate - has grooves and raised areas which engage with similar features on spigot on door closure plate - Google Patents

Abstract

A plastic cover and/or fixing cap (10) for a door closure plate located in an orifice through a thin wall e.g. a door (14). The door plate has a grip (12) which sits against the outer face of the wall (14). A projecting spigot (16) on the plate penetrates the orifice and protrudes on the rear face of the wall (14). The cover and/or fixing cap (10) is pushed onto the projecting spigot (16) and rests against the rear face of the wall (14). Both the cap (10) and spigot (16) are mfd. in polyamide and have grooves and/or projections which engage with each other to retain the cap (10) on the spigot (16). USE/ADVANTAGE - The cap/cover are used to attach a door closure plate to a thin wall e.g. a door, are resistant to sepn. due to rotation or vibration and is not limited to a circular cross-section.

Description

The invention relates to a cover and / or fastening Plastic cap for breakthroughs in one thin wall, such as sheet metal door leaf, insertable lock or the like, like rod lock with swivel lever actuation, the closure with one on the outer surface of the thin Wall or the door leaf attachable lock plate or recess is provided, in one piece by at least one by the Breakthrough inward projecting approach.

Such a cover and / or fastening cap is already known from European patent publication 02 61 266 in various embodiments. As showing in the Fig. 30 embodiment to 32 shown a pivot lever bar closure such a covering and mounting cap, which is a projection of a trough to be screwed which approach through a corresponding opening in the door panel of a switchgear cabinet therethrough ranges and for receiving a cylinder lock Provided pivot lever projection is used to lock a pivot lever in the pivoted position.

The well-known cap has two tasks, on the one hand, it should the edges of the breakthrough of the Clamp the door leaf and thus a fastening function secondly, it should cover the breakthrough, for example for the purpose of passing gases or prevent moisture from breakthrough.

The cap is fastened with two screws, which are in appropriate holes are screwed into the trough and thereby fix the cap.

Another possibility is in the European patent publication 00 54 225 shown in which a ver lowerable lock for control cabinet doors also one Has trough with an approach through a door reach through. Here is the approach with a scope provided with a thread on which an internally threaded Circular cross-section plastic cap is placed. Here, too, the cap is intended to have fastening functions meet, on the other hand seal the breakthrough.

The former embodiment has the advantage that the Cross-sectional shape of the cap can be arbitrary per se the disadvantage, however, is the need to use this cap to fix one or even more screws, which isn't requires only complicated injection molded parts, but also at assembly relatively time-consuming manipulations required.

The second embodiment is somewhat simpler in that Manufacturing, can also be assembled faster, but is only for circular or at least circular sections having cap profiles suitable.  

Unless special precautions are taken both closures also have the disadvantage that the Can loosen fastenings again, for example, if the closure is subjected to strong shaking movements and the screws or the screwable cap are not quite should be tightened.

The object of the invention is the After described above avoid parts and a cover and / or fastening to create cap of the type mentioned, in which the always somewhat awkward rotary movements for fastening screw or be avoided for the cap itself which, moreover, the cap shape is not essentially one Circular shape needs to be limited, and not that There is a risk that mounting screws or the Unintentionally loosen the cap yourself by shaking it.

The object is achieved in that the Cover and / or fastening cap on the through the thin Wall or part of the extension reaching through the door leaf until it lies flush against the inner surface of the thin Wall or the door leaf can be pushed open, being circumferential areas of the approach and those that come into contact with it Inner surfaces of the cap with perpendicular to the direction of postponement or perpendicular to the cap axis, to each other parallel grooves or projections are provided such that the cap through when it reaches the flush fit Interlocking of at least one groove and / or one Projection of cap or approach locking together get caught.

This construction allows the trough and the attachment simultaneous coverage of the opening in one Closure of the type mentioned with a single Postponement movement take place without screws being screwed in or the cap itself would have to be screwed on.  

The attachment thus formed can no longer unintentionally loosen by shaking, as is the case with screw connections, if these are not specially secured, sometimes is the case.

It does not have to cover the entire inner wall of the cap entire outer surface of the projection with such grooves or Projections. It is enough according to one more education of the invention if the grooves or projections only along selected wall sections of the inner surface in the Cap (and accordingly along the outer surface of the An sentence) are arranged.

Depending on the extent of these wall sections compared to the other wall sections result in weaker or stronger detents, with the weaker detents are preferable if the cap can be detached again should, the stronger if this is not necessary or is not desired.

An advantage of the partial arrangement of the grooves or Projections in particular in the inner surface of the cap that that their injection molding manufacture is essential is easier than if it covers the entire inner surface should be ordered. There are corresponding advantages even with cross sections deviating from the circular shape for Cap or neck.

The cross-sectional shape of the grooves or projections should be like this be chosen so that they slide in the direction of the pushing force oppose as little resistance as possible, against in reverse direction as much resistance as possible. A cross cut profile that has proven itself in this sense has, is one in which the grooves or projections are sawtooth are shaped, with different slopes of both sides of the tooth, the side of the tooth with the smaller one  Incline (with respect to the direction of postponement) to the cap opening or should be to the neck face.

It has also proven to be beneficial in such a case Profile the tip of the sawtooth's teeth facing outward point, flatten or cut off what the one Material load is reduced, but especially the danger eliminates that during the postponement by sheared Material from these tips additional jamming effects result that are not desired, or that for another but also by depositing such material residues between the individual grooves and tips an uneven concern is caused.

The slope of the steeper tooth side can be approximately 90 ° amount, while the slope of the tooth side with the ge smaller slope is preferably 40 to 50 °, wherein a slope of approximately 45 ° is particularly favorable has proven, because then in the approach as well can be formed in the same way in the cap, and nevertheless, the two lie on top of each other at an angle areas is made possible.

If you cut off the tips of the protruding teeth, you can it should be appropriate to the associated recessed grooves the counterpart by filling up also flatter make, preferably so far that the flattened teeth of the (e.g. cap) with its flattened part straight up to the filling limit of the grooves (e.g. the Approach) are sufficient.

The advantage is that the material weakening in the area of Groove formation is reduced because of deep penetration sharp recesses lead to notch effects.

The height difference of the tooth profile of the cap is preferred  larger than that of the approach, such as twice that large. This leaves certain free spaces in which Remnants of dirt and the like can be deposited without the rich Endangering the grooves and projections against each other.

The attachment of the larger height difference in the cap has the advantage that this makes the cap somewhat more flexible, on the other hand, the cap wall thickness can be done without major problems be adapted to a larger height difference, while at the approach that is mostly in itself swivel lever parts with cylinders lock devices must accommodate less to enlarge the wall thickness provides.

The height difference of the tooth profiles of the cap can be preferred approximately 0.4 A, that of the projection approximately 0.2 A, where 0.5 A is preferably the tooth spacing. Dimension A depends depending on the application, with conventional swivel lever locks, which are made of polyamide has a dimension A of 1 mm proven. Cap or neck can be almost right have angular cross section, in which case only parts of two opposite walls of a total of four Cross-sectional walls need to be serrated. The cap or the approach can also be an approximation have a round cross-section, in which case it is has proven itself, edge areas offset by 90 ° to each other to be serrated.

It has already been mentioned that the cap as well as the neck can preferably be injection molded from polyamide, which Material particularly good for the purpose intended here is suitable, on the one hand, because of the flexibility given because of the easier sprayability.

The cap can, as in the European patent ver publicity 00 54 225 mentioned, on its edge with a Be provided in one piece. Has this sealing lip  in addition to the sealing function, the advantage that it u. U. one Compensate for intermediate areas, because when pushed on the cap on the approach the locking only in each case determined a certain minimum distance from each other level steps, for example at a distance of 0.5 A. or for example 0.5 mm.

Instead of such a sealing lip, one can of course also be used especially sealing washer or a sealing ring be seen, the material properties of these spe target purpose are particularly adaptable.

The invention is explained below with reference to exemplary embodiments play explained in more detail, which are shown in the drawings are.

It shows:

Fig. 1, 1A, in a top view of an invention designed according to covering and / or fastening cap having a substantially circular cross-section;

FIGS. 2, 2A an axial section through the cap according to FIGS. 1 and 1A;

Fig. 3, 3A to a wall portion of the cap in five times magnified view (detail Z);

Fig. 4, 4A, o an associated pivot lever bar closure trough with the cap according to Fig. 1 to 3 or 1A to 3A matching approach for fixing this trough in an opening of a cabinet door leaf., Etc .;

FIG. 5 shows an axial sectional view of the trough according to FIG. 4;

FIG. 6 shows a view from the right (top view) of the trough according to FIG. 5;

Fig. 7 is a sectional view taken along section line VII-VII of Fig. 6;

Fig. 8, 8A shows a detail as to the scope of the projection (five times enlarged detail Z of FIG. 7);

Fig. 9 is an enlarged view of a wall cross section, preferably provided for the outer surface of an approach;

FIG. 10 is the corresponding cross-sectional shape, preferably the inner surface of the associated wall of a cap;

Figure 11 is a cross-section of the wall portions of the cap and neck after the cap is placed on this approach.

Fig plan view having a substantially right-angular cross-section cap 12;.

FIG. 13 shows a longitudinal sectional view through the cap according to FIG. 12;

FIG. 14 shows a cross-sectional view through the cap according to FIG. 12;

FIG. 15 is a left side view (rear view) on the cap of FIG. 13;

FIG. 16 is a five-fold enlargement of the wall portion in accordance with the detail Z Fig. 13;

Figure 17 is a rear view (rear view) of a trough in the 12 to 16, could be used a substantially rectangular cap, for example of FIG..;

FIG. 18 is a longitudinal section through the trough according to Fig. 17;

FIG. 19 is a right side view (top view) of the trough according to Fig. 18;

FIG. 20 is a section along the line 20-20 of Fig. 19;

FIG. 21 shows a detail enlarged five times with regard to the arrangement of grooves and projections on one side wall of the extension of the trough according to FIG. 18;

Fig. 22 shows a further detail in five-fold larger scale.

In Fig. 1 and 1A, a cap 10 and 110 can be seen in a plan view, which can serve both as a cover cap, as well as a fastening cap for a in openings in a thin wall, such as sheet metal door leaf, Ver lockable, in particular one Rod lock with swivel lever actuation, with reference being made to FIGS . 4 to 8 in this connection. There, the locking trough or lock plate 12 can be seen, which can be introduced in a breakthrough in a thin wall or sheet metal door leaf 14 , shown in dashed lines in Fig. 5, by one piece of this lock plate 12 through a breakthrough inwardly projecting approach 16 or 116 ( FIG. 4A), to which the cover cap 10 (or 110 ), which is likewise only shown in broken lines in FIG. 5, can be applied. The trough or lock plate 12 which can be seen in FIG. 5 is provided at its other end with a bearing shoulder 18 which also extends through the thin wall 14 and which, for example, can be provided with a circumferential thread in a manner known per se, see the publications mentioned at the outset the a cap nut 20 can be screwed on to this end of the trough or the lock plate 12 to be mounted in that the cap nut 20, clamps the edges which here forms the opening in the thin wall 14 between itself and the lock plate 12th

In the trough 12 , a pivot lever, not shown here, can be used in such a way that it can be pivoted at one end about an actuation axis passed through the bearing projection 18 , while its other end, which carries a cylinder lock, penetrates into the space 22 , which in the Area of the approach 16 is formed by the trough 12 . The space 22 has in principle such dimensions that a cylinder lock with the cylinder lock comprising sides walls, which are formed by the pivot lever, can be pivoted into the space 22 . The thumb of this cylinder lock carried by the swivel lever can then slide over an inclined surface 24 to a holding surface 26 when the lock is actuated, these surfaces being arranged symmetrically on both sides of the longitudinal axis 28 of the trough, so that cylinder locks can be installed on the right and left.

The thumb locks in the locked position the cylinder lock and the associated pivot lever in the position swung into the trough.

When the pivot lever is also pivoted out, the space 22 creates a connection between the interior, which is covered by the thin wall or the door leaf, and the exterior space. In order to close this connection, the cap 10 serves (in addition to the fastening function), which, in addition to the space 22, also covers the cylinder lock sufficient in this space, together with fastening devices which are formed by the swivel lever.

While in the European patent publication 00 54 225, the cap used there has an internal thread which can be screwed onto a corresponding external thread formed by the circumference of the extension 16 , the circumferential surface 30 of the extension 16 and accordingly also the one with the arrangement shown here your coming in contact inner surfaces 32 of the cap 10 with perpendicular to the cap axis 34 projections 36 or grooves 38 or, for the counter surface, with projections 40 and grooves 42 , see FIGS . 10 and 9.

In the embodiment shown in FIG. 4, the entire circumferential surface 30 is preferably provided with grooves of the shape 42 shown in FIG. 9 and projections of the shape 40 , while the associated cap, see FIGS. 1A to 3A, is only provided in certain partial areas of the walls Projections and grooves or recesses (e.g. 36, 38 in the form of Fig. 10), see reference numeral 44 in Fig. 2A, while in other parts of the inner circumference the walls are smooth and with the grooves and recesses of the circumference 30 of the An sentence 16 do not engage. See reference numeral 46 in Fig. 2A. Alternatively, as shown in FIGS. 1 to 3, the entire inner circumference of the cap can also be provided with grooves 36 and recesses 38 , which results in a much firmer locking which can no longer or only with difficulty be released.

The arrangement according to FIGS. 1A to 3A, on the other hand, allows the cap to be lifted and removed intentionally, since the holding forces of the only limited areas 44 are lower.

Alternatively, however, see FIG. 4A, the approach 116 can be provided with a circumference 130 that is only sufficient in certain loading, see for example reference number 144 , with a corresponding arrangement of projections and recesses according to FIG. 8A, while the Intermediate areas 146 are left smooth and with respect to the outer contour of area 144 springs back so far that it is not in line with the projections and recesses of the cap to be pushed open, as can be seen in FIGS. 1 to 3 or 1A to 3A handle comes.

The areas 144 and 146 are preferably arranged offset from one another around the circumference at a distance of 90 °, so that two areas provided with grooves and projections 146 , 144 lie diametrically opposite one another and thereby enable particularly favorable transmission of radially occurring forces.

The ratio between the area with smooth circumference 146 and the area of the area 144 provided with grooves and projections can be approximately 50:50, or the proportion of the smooth area 146 is somewhat larger, e.g. B. about 60 to 70%.

The representations in FIGS. 8 and 8A are about the 5- compared to the representations of FIGS. 4 and 4A and 7 (the latter is a sectional view radially through the area of the shoulder 16 and 116 , along the section line VII-VII). magnified several times to make the selected proportions clear. The conditions in the already mentioned FIGS. 9, 10 and 11 can be seen even more precisely, which form an even greater magnification. It can be seen from FIG. 10 that the cross-sectional profile of the grooves or recesses 38 or the projections 36 is sawtooth-shaped, with a different pitch between the two tooth sides 48 and 50 , the tooth side 50 with the smaller pitch, see also FIG . 3, the cap opening 54 and the end face at the block 52 has. The steeper tooth side 48 preferably has an incline of approximately 90 °, as can also be seen in FIG. 10. In contrast, the slope of the tooth side 50 with the smaller slope is approximately 40 to 50 °, but is preferably approximately 45 °, as can be seen from FIG. 11. This results in a precise flatness between the corresponding inclined surfaces of two interlocking surfaces, as can be seen in FIG. 11.

As can further be seen from FIG. 10, the tooth tip 56 that is sent to the outside is cut off, so that there is a substantially flat surface with an axial extension of 0.2 A, as indicated in FIG. 10. The size A is a measure of the distance between the individual grooves or projections lying parallel to one another, see FIG. 11, where this distance is equal to 0.5 A. A dimension of A = 1 mm has proven to be favorable, at least in the case of the swivel lever locking devices shown in the figures and the material used for this, namely polyamide. In addition, a relatively small dimension of A has the advantage that the step dimension with which the two opposing profiles interlock, that is the dimension 0.5 A, remains relatively small and therefore a very precise adaptation to different thicknesses for the thin one Wall 14 or the door leaf 14 results, so that - using a certain resilience of the material - a sufficient interference fit without substantial play between the cup rim of the cap 10 and the inner surface of the door leaf 14 results. An essentially play-free fastening of the trough 12 at its end provided with the attachment 16 is thus made possible by pushing on the cap 10 .

The cutting off of the tips in the manner described facilitates the sliding of the two profile surfaces shown in FIGS . 9 and 10 and also prevents the occurrence of disruptive abrasion, which could hinder the close contact between, for example, the 45 ° surfaces according to FIG. 11.

In the tooth profile of the approach, not only the tip of the projecting teeth can be flattened by cutting, as can be seen in FIG. 10, but also in FIG. 9, the recessed grooves can also be "flattened" by filling, as is the case Groove 42 of FIG. 9 reveals. The filling can be carried out so far that the flattened teeth of the counter profile just extend to the filling limit of the grooves 42 , as can be seen in FIG. 11 on the upper side.

The height difference of the profile shape according to FIG. 10, which is preferably used for the cap, is larger, preferably twice as large as that of the profile shape according to FIG. 9, which is preferably used for the approach.

In particular, the height difference of the tooth profile according to FIG. 10 (thus preferably that of the cap) is approximately 0.4 A, that of the profile according to FIG. 9 (therefore preferably that of the shoulder) is approximately 0.2 A, the tooth spacing again being 0. 5 A is assumed and A is preferably approximately 1 mm.

In the constellation as described above, a profile with a tip with an axial extension of 0.1 A results in accordance with FIG. 9, an inclined surface with an axial extension of 0.2 A follows, and a groove bottom surface with an extension of also 0.2 A, so that there is a total of the mentioned tooth length of a total of 0.5 A, presupposes that the steeply rising edge of the tooth has an axial extent in wesent union, so here also arranged at an angle of 90 ° is as shown at 48 in FIG. 10.

Fig. 12 shows that the cap need not necessarily have a round cross section. Here, the cross section is rather rectangular, matching a trough which has a correspondingly rectangular cross section 230 , see FIG. 17, which shows a trough 212 in a view from behind, which is narrower than in the embodiment according to FIG . 4. the trough 212 has so far resembles a trough, as shown in European Patent publication 02 61 266, for example, in FIGS. 30 to 32, except that a different attachment for the cap is provided here. While 230 screws are used to fasten the cap on the extension in the cited document, which screws are screwed into corresponding blind holes in the trough 212 , see a similar type of fastening at the other end of the trough structure shown in FIG. 17, there the reference number 58 , here again is Provide the cap with an area 244 made of grooves and protrusions in the manner already described, see FIG. 14, while other areas of the inner wall of the cap 210 are left smooth. See reference number 246 .

Correspondingly, the outer wall 230 of the projection 216 of the trough 12 according to FIG. 17 has regions 344 provided with profilings, as well as smooth regions 346 .

It should also be added that the cap edge 60 can have an inner face 62 , in particular in the area of the profiling 244 , in order to make it easier to put the cap on the neck.

In order to ensure the tight fit of the cap rim 60 on the bearing surface 64 lying around the neck 216 of the trough 212 , it can be seen in FIG. 22 that a return jump 66 runs around the neck edge.

Claims (14)

1. Cover and / or fastening cap made of plastic for a in openings in a thin wall, such as sheet metal door leaf ( 14 ) insertable closure or the like., Like a rod closure with pivot lever actuation, the closure with a on the outer surface of the thin wall or Door leaf ( 14 ) attachable lock plate or trough ( 12 ) is provided, from which one piece at least one starts through the opening in front of jumping approach ( 16 ), characterized in that the cover and / or fastening cap ( 10 ) on the the thin wall or door leaf (14) therethrough reaching part of the projection (16) can be pushed until flush abutment with the inner surface of the thin wall or door leaf, wherein the circumferential surfaces (144, 146) of the projection (16) and with these inner surfaces ( 32 ) of the cap ( 10 ) coming into contact with one another perpendicular to the push-on device or perpendicular to the cap axis ( 34 ) parallel grooves or projections ( 36 , 38 ; 40 , 42 ) are provided in such a way that the cap ( 10 ) and the projection ( 16 ), when reaching the flush fit, engage in one another by at least one groove and / or a jump ( 36 , 38 ; 40 , 42 ) of the cap ( 10 ) or attachment ( 16 ) interlocking. 2. Cap according to claim 1, characterized in that the grooves or projections only along selected Wandab sections (z. B. 144; 44 ) of the inner surface of the cap ( 10 ) and / or the outer surface of the projection ( 16 ) are provided. 3. Cap according to claim 1 or 2, characterized in that the cross-sectional profile of the grooves or projections is sawtooth-shaped ( Fig. 9 to 11), with differing slope of the two tooth sides ( 48 , 50 ), the tooth side ( 50 ) with the smaller slope to the cap opening ( 54 ) or to the attachment face ( 52 ). 4. Cap according to claim 3, characterized in that the Tooth tips are cut off. 5. Cap according to claim 3 or 4, characterized in that the slope of the steeper tooth side ( 48 ) is approximately 90 °. 6. Cap according to one of claims 3, 4 or 5, characterized in that the slope of the tooth side ( 50 ) with the smaller slope is 40 to 50 °, preferably approximately 45 °. 7. Cap according to one of claims 3 to 6, characterized in that in the tooth profile not only the tips of the projecting teeth are flattened by cutting, but also the recessed grooves ( 42 ) are flattened by filling, preferably so far that the flattened The teeth of the cap with their flattened part reach straight up to the filling limit of the grooves in the attachment. 8. Cap according to one of claims 3 to 6, characterized ge indicates that the height difference of the tooth profile the cap is larger, preferably twice as large that of the approach. 9. Cap according to one of claims 3 to 6, characterized ge indicates that the height difference of the tooth profile the cap about 0.4 A, the approach about 0.2 A is, where 0.5 A is the tooth spacing. 10. Cap according to claim 9, characterized in that the Dimension A is about 1 mm. 11. Cap according to one of claims 1 to 10, wherein the Cap or the approach an approximately rectangular Have cross section, characterized in that only Parts from two opposite sides with one Teeth are provided. 12. Cap according to one of claims 1 to 10, wherein the Cap or approach an approximately round cross have cut, characterized in that um each with 90 ° offset to each other have teeth. 13. Cap according to one of claims 1 to 12, characterized characterized in that the cap and / or the neck out Are injected into polyamide.   14. Cap according to one of claims 1 to 13, characterized characterized in that it has a sealing lip on its edge wearing.