DE10357542B4 - Concealed hinge arrangement of a manhole cover - Google Patents

Abstract

Hinge assembly of a manhole cover having a rectangular cross-section mandrel (3) with rounded edges and a bearing shell (7) almost completely surrounding the mandrel (3) forming part of a cover (4) supporting the cover of the manhole cover (3) ) is pivotable around in different angular positions and has a passage opening (8) through which the mandrel (3) at a feed-through angular position of the hinge assembly can be passed in such a way that the bearing shell (7) on the mandrel (3) and placed on the mandrel (3) is deductible, characterized in that the bearing shell (7) is provided at its periphery with a rectangular cross-section locking groove (9) into which the rectangular mandrel (3) is latchingly latched at a locking angular position of the hinge assembly.

Description

The invention relates to a hinge assembly of a manhole cover, with a rectangular cross-section mandrel with rounded edges and a mandrel almost completely surrounding bearing shell, which is part of a lid of the manhole cover-carrying tab, around the mandrel in different angular positions is pivotable and has a passage opening through which the mandrel can be guided in such a way that the bearing shell can be placed on the mandrel and can be lowered from the mandrel in the case of a lead-through angular position of the hinge arrangement.

Furthermore, the invention relates to a manhole cover with a hinge arrangement.

Such a hinge arrangement is known from EP 0 084 510 B1 known. It has the advantage that it is insensitive to soiling and thus low maintenance due to the largely tight conclusion upwards.

If here of manhole covers is mentioned, closures for entry or inlet openings of hollow structures are meant in the broadest sense. This can be, for example, the lids used in the roadbed of manhole manholes or also so-called street mounds, which are used with their lids designed as grate for drainage structures sealed surfaces.

However, hinge assemblies of the specified type have the disadvantage that the lid from the open position can be inadvertently given away by pushing or abutment, so there is a risk that the lid may accidentally fall into the shaft, for example, during repair or maintenance in the shaft.

The object of the invention is therefore to further develop the hinge assembly of the type mentioned in that the unfolded for example for repair or maintenance cover can not fall to the wrong time.

To solve this problem, the invention proposes, starting from the hinge assembly of the type mentioned above, that the bearing shell is provided at its periphery with a rectangular cross-section detent groove into which the rectangular mandrel is locked latching at a locking angular position of the hinge assembly. As a result, the hinge assembly additionally receives a locking function, which prevents inadvertent closing of the manhole cover.

The object is also achieved by a manhole cover according to claim 4.

An expedient development of the invention provides that the mandrel receiving cavity of the bearing shell has a substantially circular cross section and in cooperation with the mandrel, in particular with its rounded edges, supports a rotary pivoting movement of the hinge device.

The hinge arrangement according to the invention can only be taken apart or brought together again in its feed-through angular position. To make it easier for the user to find the lead-through angular position, it is provided that when the lid is hinged from the closed position to the open position, first the locking angular position and then the lead-through angular position is reached, in which the tab of the bearing shell on a Stop the frame of the manhole cover strikes. The congruent arrangement of the feed-through angular position and the stop angular position ensures that the user reaches the feed-through angular position at the moment in which the hinge abuts. It is therefore not possible to miss implementation angular position.

When using the hinge assembly according to the invention on a manhole cover with an embedded in a traffic area frame, attachable to the frame, hinged between its open position and its closed position lid is further provided that the hinge assembly is arranged in a downwardly open hinge box, the part the frame of the manhole cover is. Such a downwardly open hinge box has the advantage that impurities which penetrate into the hinge box from above, can leave this down again. This prevents dirt from accumulating within the hinge box.

In order to further reduce soiling sensitivity, the invention further proposes that the tab supporting the lid of the manhole cover has a protruding lip which, in the closed position of the lid, conforms to an inner wall of the hinge box. This lip largely prevents the ingress of contaminants in the interior of the hinge box with the lid closed. The inner wall of the hinge box is suitably used at the same time as a stop for the lid in its stop angular position.

Finally, it is provided that the frame of the manhole cover guide surfaces, on which outer surfaces of the bearing shell as Part of the lid of the manhole cover bearing tab are guided so that the mandrel does not engage in the latching groove during the hinge of the lid from the closed position to its open position. This ensures that the locking locking angular position can only be achieved when closing, but not when opening the lid.

embodiment

• 1a - 1c: Scharnieranordnung im Querschnitt, in drei unterschiedlichen Winkellagen;
• 2: Lasche im Querschnitt;
• 3: Scharnieranordnung in Draufsicht;
• 4: Scharnierkasten in Draufsicht;
• 5: Scharnierkasten entlang der Schnittlinie A-A.

An inventively designed hinge assembly will now be presented with reference to drawings. It shows:

• 1a - 1c : Hinge arrangement in cross section, in three different angular positions;
• 2 : Flap in cross section;
• 3 : Hinge arrangement in plan view;
• 4 : Hinge box in top view;
• 5 : Hinge box along section line AA.

The hinge arrangement 1 includes a hinge box 2 in which two spines 3 and a tab 4 are housed. The hinge box 2 is from an inner wall 5 bounded and is part of a frame, not shown, a manhole cover. At the bottom is the hinge box 2 open. The spines 3 are on the inner wall 5 attached and thus immovable. The tab 4 is part of a cover, not shown, of the manhole cover, which together with the tab 4 around a pivot axis 6 the hinge arrangement 1 is pivotable.

The tab 4 includes two cups 7 , each one of the two spines 3 assigned. The following are the duplicate components 3 . 7 described in the singular.

The bearing shell 7 has a substantially circular cross-section. On the thorn 3 she sits almost completely around him. When swinging the tab 4 about pivot axis 6 The spine "moves" 3 within a cylindrical cavity, the lateral surface of the bearing shell 7 represents. To remove the lid from the frame, the tab must 4 completely out of the hinge box 2 be removed. For this purpose, the bearing shell 7 from the thorn 3 discontinued by thorn 3 through a passage opening 8th in the bearing shell 7 is passed. Because the thorn 3 has a substantially rectangular cross-section with rounded edges, it is sufficient, the passage opening 8th also to be provided with a rectangular cross-section. The passage opening 8th thus provides a narrow gap in the bearing shell 7 represents.

The circumference of the bearing shell 7 will be next to the opening 8th also by a catching throat 9 interrupted. mandrel 3 is in the catching throat 9 latched, so that thorn 3 and bearing shell 7 can be locked together. To the thorn 3 has to catch, has Rastkehle 9 the shape of a longitudinal groove with a rectangular cross-section.

In the 1a to 1c is the hinge arrangement 1 shown in different angular positions. In 1a is the to flap 4 associated cover of the manhole cover in the open position, in 1b in locking position, in 1c the lid is in closed position. During the hinging of the lid, the bearing shell slides 7 along the spine 3 ,

In open position ( 1a) the lid is open at an angle of about 105 ° to the horizontal. The tab 4 leans against an investment area in this position 10 the inner wall 5 on, for the tab 4 as a stop 11 serves. The bearing shell 7 is thus in abutment angular position. At the same time, it is in the lead-through angular position. mandrel 3 is namely inclined relative to the vertical by about 15 ° and therefore in abutment angular position radially on the passage opening 8th directed. In the in 1a shown angular position of the tab 4 (Stop and feed angular position of the bearing shell 7 ), it is thus possible, the lid in the radial direction to the pivot axis 6 to remove from the frame. It glides Dorn 3 through the opening 8th out, bearing cup 7 is from the thorn 3 discontinued. This process is easier for a user, not shown, in that he the tab 4 along the investment area 10 the inner wall 5 can lead. Thanks to the stop 11 is the lead-through angular position of the bearing shell 7 easy to find.

As in 1b shown, the hinge assembly is lockable. The lid is inclined in this position about 80 ° relative to the horizontal, the bearing shell 7 is in locking angular position. In this the thorn snaps 3 into the catching throat 9 the bearing shell 7 one. When swinging the lid from its open position, the tab gets 4 automatically in its locked position. This is an additional gain in security, because it is not possible that a lid from the open position falls directly into the closed position. To lock between bearing inner shell 7 and thorn 3 To solve, the lid must be raised accordingly, leaving the spike 3 becomes free again.

In some lockable manhole covers, it is not desirable that the lid gets into its locked position when it is opened. Rather, he should be able to be moved directly into his open position. To make this possible, the frame is with guide surfaces 12 provided on those outer surfaces 13 slide the tab along when panning. Both surfaces 13 . 14 are designed so that the tab 4 when hinging the lid from its closed position ( 1c) in its open position ( 1a) not in its locked position ( 1b) retracts. This happens because the guide surfaces 12 the tab 4 in the area of the residual angular position, support that thorn 3 not in the catching throat 9 into slides. When closing the lid ( 1a to 1c) the outer surfaces act 13 with the guide surfaces 12 not together in this way, so that the locking position ( 1b) , as described above, is inevitably taken. The user can only prevent this by lifting the lid slightly in the area of the locking angular position, so that the mandrel 3 on his way along the bearing shell 7 the catching throat 9 overcomes.

In 1c the lid is in the closed position, it lies horizontally on the frame. The tab 4 closes the hinge box 2 upwards. A lip 14 that's out of the tab 4 radially to the pivot axis 6 exit, nestles in this position to the projecting investment area 10 the inner wall 5 of the frame of the manhole cover belonging hinge box 2 at. This seals the lip 14 the freedom of movement of the tab 4 below the top edge of the hinge box 2 as far as possible against contamination. In closed position ( 1c) there is only a narrow gap 15 between lip 14 and investment area 10 through which hardly any impurities in the hinge box 2 can penetrate. The passage opening 8th is horizontally aligned in the closed position. This prevents contamination in the vertical direction, ie rising from above or ascending from below, into the cylindrical interior space inside the bearing shell 7 can enter.

Claims (6)

Hinge assembly of a manhole cover having a rectangular cross-section mandrel (3) with rounded edges and a bearing shell (7) almost completely surrounding the mandrel (3) forming part of a cover (4) supporting the cover of the manhole cover (3) ) is pivotable around in different angular positions and has a passage opening (8) through which the mandrel (3) at a feed-through angular position of the hinge assembly can be passed in such a way that the bearing shell (7) on the mandrel (3) and placed on the mandrel (3) is deductible, characterized in that the bearing shell (7) is provided at its periphery with a rectangular cross-section locking groove (9) into which the rectangular mandrel (3) is latchingly latched at a locking angular position of the hinge assembly. Hinge arrangement after Claim 1 , characterized in that the mandrel (3) receiving cavity of the bearing shell (7) has a substantially circular cross section and in cooperation with the mandrel (3) supports a rotary pivoting movement of the hinge device. Hinge arrangement after the Claims 1 and 2 , characterized in that when the lid is hinged from the closed position to the open position first the locking angular position and then the lead-through angular position is reached, in which the tab (4) of the bearing shell (7) on a stop (11) of the frame Manhole cover strikes. Manhole cover with a recessed in a traffic area frame, attachable to the frame, hinged lid and a hinge assembly according to one of Claims 1 - 3 with which the lid is hinged in an open position and in a closed position, wherein the hinge arrangement is arranged in a downwardly open hinge box (2) which is part of the frame of the manhole cover. Manhole cover after Claim 4 , characterized in that the cover (4) carrying the cover of the manhole cover has a projecting lip (14) which, in the closed position of the cover, conforms to an inner wall (5) of the hinge box (2). Manhole cover after Claim 4 , characterized in that the frame of the manhole cover guide surfaces (12) on which outer surfaces (13) of the bearing shell (7) as part of the cover of the manhole cover bearing tab (4) are guided such that the mandrel (3) during the hinge the lid from the closed position in its open position not in the latching throat (9) snaps one.

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