EP2920373A1

EP2920373A1 - Closure for locking a covering

Info

Publication number: EP2920373A1
Application number: EP13794843.6A
Authority: EP
Inventors: James Canney; Jérôme DUBOIS; Didier Ollivier
Original assignee: ACO Severin Ahlmann GmbH and Co KG
Current assignee: ACO Ahlmann SE and Co KG
Priority date: 2012-11-14
Filing date: 2013-11-13
Publication date: 2015-09-23
Also published as: WO2014076107A1; CN104781474B; DE102012110941A1; US9689135B2; CN104781474A; AU2013346862A1; AU2013346862B2; US20160289913A1

Abstract

Coverings for structures which can be installed in the ground are known. For example, these are drainage channels or manholes. In order to lock the covering on the structure, closures are known which comprise a snap bolt which is designed in such a way and is mounted movably on the covering (20) against the force of a spring device in such a way that, during closing of the covering (20), the snap bolt is forced back and snaps in behind a counterbearing (14, 14') fixed to the structure in a closure position. To simplify the arrangement and also to improve durability, it is proposed that the snap bolt is mounted in a housing (40) which can be fastened in a housing receptacle of the covering (20).

Description

Lock for locking a cover

description

The invention relates to a closure for locking a cover on a built into a ground structure according to the preamble of claim 1, and a correspondingly designed cover.

For drainage of surfaces drainage gutters are known which comprise a gutter installable in the soil and a cover mounted on the gutter, so that the drainage channel can be run over. Other structures are point drainages or manholes, which must also be closed so that they do not disturb the traffic. In any case, it is important that the attachment of the cover on the built in the ground structure is safe.

On the other hand, it is also important that the assembly and disassembly of the cover on the building are very simple, as often cleaning work.

From US 3 201 161 or US 1 693 190 closures for covers or covers are known which comprise a latch which is mounted on the cover and against the force of a spring is movable such that the latch when closing the cover pushed back and snaps in a closed position behind a non-structural abutment. However, the known closures or covers are very complex. In addition, the closures or covers are at risk of corrosion, so that after a certain period of use a correct function is no longer guaranteed.

The invention is based on the object, a closure for locking a cover or a cover with such a closure to the effect that with a simple structure and ease of installation a permanent functioning is guaranteed.

This object is achieved by a closure according to claim 1 or a corresponding cover.

In particular, this object is achieved by a closure for locking a cover on a buildable in a ground structure, z. As a drainage channel or a shaft, with a latch, which is designed and mounted on the cover against the force of a spring device so movable that the latch is pushed back upon closing the cover and snaps in a closed position behind a non-structural abutment, solved wherein the latch is mounted in a housing which is mountable in a housing receptacle in the cover. The object is thus achieved by a cover with such a closure.

An essential point of the invention is that the latch is no longer stored directly in the cover and its components, but rather a housing is provided, which in turn is then secured in the cover. This makes it possible to create a self-contained unit, consisting of housing and the moving components, in which the individual elements are matched. This entire component can then be fastened in the cover again.

It is possible that the housing of the snap lock is opened downwards. This allows the items of snap, such as latch and coil spring easily maintained or replaced. Furthermore, dirt that has penetrated into the housing falls out of the downwardly open housing due to gravity when the grate is locked and one Functional impairment of the latch due to contamination in the housing is counteracted.

Preferably, the housing receptacle is formed as an edge-side recess in the cover, in which the housing is permanently fixed in the closed position. The structure, ie the drainage channel or the shaft, which in such buildings always have an edge (a frame), thus simultaneously forms an element which secures the housing and thus the bolt in the cover.

Preferably, the housing is formed closed at its upper surface in the closed position. This makes it possible to keep any penetration of dirt or the like, the function of the bar impairing substances away from the bolt.

The housing preferably has a retaining groove (or a retaining spring), via which the housing can be fixed in a recess of the cover, which has a complementary retaining spring (or retaining groove). The attachment of the

Housing (and thus the bolt) in the cover thus takes place positively with extremely low installation costs.

The housing and / or the latch are preferably made of a plastic. In particular, this is an injection molding process. By this choice of materials, on the one hand, a simple production, on the other hand, a high corrosion resistance is ensured.

The housing is also preferably designed such that it can be inserted into the recess in a direction of movement of the snap latch. This means that in the closed position of the bolt at the same time the housing can not be moved and thus is securely connected to the cover.

The housing preferably has a guide enclosing the latch. This ensures a functionally reliable storage of the bolt in the long term. The latch preferably has a stop which limits its movement in the closing direction. The latch is thus comparable with the housing so a mortise lock that can be installed in a door.

Finally, the latch preferably comprises a clamping device, by which the spring device can be connected to the latch. As a result, a particularly simple assembly of the arrangement is ensured.

Another important point in a closure or a cover of the type shown here is the operability when opening the cover. To facilitate this, it is proposed that the housing in a front region, from which protrudes the latch, has an engagement recess such that the latch by means of a from above through the

Engaging projection inserted tool, for. B. a screwdriver, is pushed back into an open position. This engagement return thus also shows the user where to start the tool.

The housing further preferably has on its underside, under the latch on an engagement slope over which the cover by means of a tool, for. B. a screwdriver from the building can be lifted. With one and the same tool so on the one hand the latch is opened, on the other hand then serves the opening tool for lifting the cover.

The counter-bearing is preferably formed in two parts, that a tool, for. As a screwdriver, between the two parts of the thrust bearing for engagement with the latch is inserted. This is a targeted

Positioning of the tool is very easy.

Furthermore, an inclined surface is preferably mounted under the abutment such that a tool, for. As a screwdriver, which is used to open the latch, is moved during insertion and in contact with the inclined surface by this inclined surface in the opening direction. The tool is thus steered by this inclined surface.

In the following description, a preferred embodiment of the invention will be explained in more detail with reference to figures. Hereby show: a perspective view of a drainage channel with partially applied cover, a perspective view of the cover of FIG. 1 obliquely from above, a perspective view of the cover of FIG. 1 obliquely from below, a longitudinal section through an embodiment of the closure, a view of the closure along the line VV of FIG. 4, a section along the line VI-VI- of FIG. 5, a perspective view of a closure obliquely from above, a perspective view of the closure of FIG. 7 obliquely from below, an exploded view of the closure according to FIGS. 7 and 8, a cross-section through a cover with closure and drainage channel according to the embodiment of Fig. 1 in various assembly positions and perspective partial sectional views corresponding to the assembly positions of the arrangement according to FIGS. 10A-10C.

In the following description, the same reference numerals are used for identical and equivalent components. As shown in Figs. 1-3, includes a built-in the ground structure - here the example of a drainage channel - a building 10 with a

Channel body 11, the upper edge of which is formed in a manner known per se by frames 12. On the drainage channel 10 and between them enclosing them sideways a cover 20 is placed with its lower-side support 24. The cover 20 comprises in the embodiment shown here a drainage channel webs 21, between which slots 22 are formed so that surface water can flow into the channel.

Both frames 12 of the structure 10 are identical. On the one hand, they have lugs 13 which protrude inward at regular intervals and, on the other hand, latch supports 14, 14 ', which are "paired" and have a tool passage 16 between them, below the tool passage 16. which, when inserted into the tool passage 16 a tool, such as a screwdriver, the leading edge of the blade of the screwdriver in the direction of the center of the channel body 11 urges.

The cover 20 in turn is asymmetrical and has at its one edge notches 23, in which the lugs 13 and counter-bearing 14, 14 'fit. On the one hand, these notches 23 are closed by a transverse web 27. This is shown in FIG. Such locking webs 27 are - as shown in Fig. 2 - not provided on the opposite side in the notches 23. As a result, when placing the cover 20 on the building 10, first the cover 20 in an inclined position (relative to its longitudinal axis) with the locking webs 27 under the lugs 13 and the locking bar 14, 14 'hook and then fold the cover 20 down , As a result, the cover 20 in the closed state by the lugs 13 and the locking counter bearing 14, 14 'on one side held firmly on the corresponding frame 12 and the channel body 11.

On the side of the cover 20, which faces the detents 23 with the locking webs 27, an enlarged recess 25 is provided opposite the central detent 23, in which a housing 40 (from outside to inside) can be inserted. The housing 40 has - as can be seen in particular from FIGS. 5 to 9 - retaining grooves 43 on its outer sides. The retaining grooves corresponding retaining springs 26 are in the recess 25 angeord- net. Thus, the housing 40 can be inserted from the outer edge of the cover 20 into the recess 25. The dimensioning is in this case made such that after inserting the housing 40, this is positively and frictionally stuck in the cover 20.

The housing 40 has a closed surface 46, while the bottom of the housing has an insertion opening 45. Furthermore, the housing on its, in the inserted state outwardly facing front surface has a recess 46. This front surface is further opened by a guide 44, at the lower edge of an engaging bevel 48 is provided.

In the interior of the housing 40, a latch 30 is used, which has a lower inclined surface 31 and an upper holding surface 32. At his

Inner end, the inclined surface 31 and the support surface 32 opposite, a pin-shaped spring seat 34 is mounted, under which a clamping tongue 35 is seated. Between the spring seat 34 and the inclined surface 31 and holding surface 32, a stop 36 is provided which widened the latch 30 so that it with the inclined surface 31 and the support surface 32 on the front of the housing 40 in the recess 47 protruding into the guide 44 is used, but does not emerge from this.

On the spring seat 34, a coil spring 33 can be placed so that they - in particular in FIG. 4 - is held by the clamping tongue 35 on the pin-shaped spring seat 34. The stop 36 opposite end of the coil spring 33 can be inserted into a spring seat 41 in the housing 40, so that then the position shown in Figs. 4, 6 and 8 is reached. In this position, therefore, the coil spring 33 biases the latch 30 outwardly from the housing 40 protruding.

The placement and locking of a cover 20 on a structure 10 will be described below with reference to FIGS. 10A to 10C and I IA to HC.

First, the cover 20 is placed obliquely so with its, the recess 25 and the housing 40 with the latch 30 opposite side on a frame 12, that the lugs 13 and the locking abutment 14, 14 'engages in the notches 23 and the locking webs 27 below the lugs 13 and the locking abutment 14, 14 'come to rest (Fig. 10A / Fig. IA). Then, when the cover 20 is folded down, the inclined surface 31 comes into engagement with the also beveled tops of the locking plates 14, 14 '(Fig. 10B / Fig. IIB), so that the latch 30 is pushed back against the force of the coil spring 33 ,

Once the end position is reached, the cover 20 so rests on the corresponding frame 12, the latch 30 is urged by the coil spring 33 to the outside, so that the holding surface 32 of the snap latch 30 with the underside of the locking plate 14, 14 'engages. Thus, the cover 20 is now firmly on the frames 12 of the channel body 11 and held firmly on the building 10. The cover 20 can not be lifted upwards in this state, since on the one hand the locking webs 27 under the lugs 13 and under the locking counter bearing 14, 14 'are in abutment. On the other hand, the lifting of the opposite side of the cover 20 is prevented by the engagement of the holding surface 32 of the latch 30 with the underside of the latching bearing 14, 14 '.

To lift the cover is a tool, for. As a screwdriver, between the two locking plates 14, 14 'inserted. The front of the blade of the screwdriver then strikes the inclined surface 15, so that the screwdriver is urged towards the middle of the channel, which in turn pushes the latch 30 against the force of the coil spring 33 in the housing 40 of the screwdriver. As a result, the holding surface 32 is disengaged from the locking abutment 14, 14 '. At the same time, by tilting the tool (screwdriver), the tool blade can now be brought into engagement with the engaging bevel 43, as a result of which the cover 20 is lifted off the frame 12. With a single tool movement of the latch are thus opened and lifted the cover.

LIST OF REFERENCES

10 structure / drainage channel

11 gutter body

12 frame

13 nose

14, 14 Bar stock 15 inclined surface

16 tool passage

20 cover

21 footbridge

22 slot

23 rest

24 supports

25 recess

26 retaining spring

27 snap bridge

30 latch

31 inclined surface

32 holding surface

33 coil spring

34 spring seat

35 clamping tongue

36 stop

40 housing

41 spring seat

42 side surface

43 holding groove

44 leadership

45 insertion opening

46 upper surface

47 return

48 engaging bevel

Claims

Lock for locking a cover

claims

A closure for locking a cover (20) on a burrowable structure, e.g. a drainage channel (10) or a shaft, with a latch (30) which is designed and on the cover (20) against the force of a spring device (33) so movably mounted, that the latch (30) upon closure of the cover (20) is pushed back and snaps in a closed position behind a non-structural abutment (14, 14 '), thereby gekgezeichn et that

the latch (30) is mounted in a housing (40) which can be fastened in a housing receptacle (25) in the cover (20).

A closure according to claim 1,

d a d u r c h g e k e n c i n c e n s that

the housing receptacle comprises an edge-side recess (25), in which the housing (40) is permanently fastened in its closed position.

A closure according to any one of the preceding claims,

d a d u r c h g e k e n c i n c e n s that

the housing (40) is formed closed at its upper surface (46) in the closed position.

4. Closure according to one of the preceding claims,

d a d u r c h g e k e n c i n c e n s that

the housing (40) has a retaining groove or a retaining spring (26), via which the housing (40) can be fixed in a recess (25) of the cover (20), which has a complementary retaining spring (26) or retaining groove (43) ,

5. Closure according to one of the preceding claims, in particular according to claim 4,

d a d u r c h g e k e n c i n c e n s that

the housing (40) is designed such that it can be inserted into the recess (25) in a movement direction of the snap latch (30).

6. Closure according to one of the preceding claims,

d a d u r c h g e k e n c i n c e n s that

the housing (40) and / or the latch (30) are made of a plastic.

7. Closure according to one of the preceding claims,

d a d u r c h g e k e n c i n c e n s that

the housing (40) has a, the latch (30) enclosing guide (44).

8. Closure according to one of the preceding claims,

d a d u r c h g e k e n c i n c e n s that

the latch (30) has a stop (36) which limits its movement in the closing direction.

9. Closure according to one of the preceding claims,

d a d u r c h g e k e n c i n c e n s that

the latch (30) comprises a clamping device (35), by which the spring device (33) with the latch (30) is connectable.

10. Closure according to one of the preceding claims,

d a d u r c h g e k e n c i n c e n s that

the housing (40) has an engagement recess (47) in a front region from which the latch (30) projects, such that the latch (30) is locked by means of a tool inserted from above through the engagement projection, e.g. a screwdriver, is pushed back into an open position.

11. Closure according to one of the preceding claims, in particular according to claim 10,

d a d u r c h g e k e n c i n c e n s that

the housing (40) has on its underside, below the latch (30), an engagement bevel (43) over which the cover (20) is secured by means of a tool, e.g. a screwdriver from the building (10) can be lifted.

12. Closure according to one of the preceding claims, in particular according to one of claims 10 or 11,

d a d u r c h g e k e n c i n c e n s that

the counter bearing is formed in such a two-part that a tool, e.g. a screwdriver, between the two parts (14, 14 ') of the abutment for engagement with the latch (30) is insertable.

13. Closure according to one of the preceding claims,

marked by

an inclined surface (15), which is mounted under the anvil (14) such that a tool, e.g. a screwdriver, which is used to open the latch, is displaced by the inclined surface in the opening direction.

14. Cover for covering a structure which can be installed in a ground, in particular a drainage channel or a shaft,

marked by

a closure according to any one of the preceding claims.