EP2508679B1 - Deckel für einen Wartungsschacht - Google Patents

Deckel für einen Wartungsschacht Download PDF

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Publication number
EP2508679B1
EP2508679B1 EP20110380030 EP11380030A EP2508679B1 EP 2508679 B1 EP2508679 B1 EP 2508679B1 EP 20110380030 EP20110380030 EP 20110380030 EP 11380030 A EP11380030 A EP 11380030A EP 2508679 B1 EP2508679 B1 EP 2508679B1
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EP
European Patent Office
Prior art keywords
lid
frame
manhole cover
cover according
closure members
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP20110380030
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English (en)
French (fr)
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EP2508679A1 (de
Inventor
Joaquim Carandell Pérez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Benito Artis SL
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Benito Artis SL
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Publication date
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Priority to EP20110380030 priority Critical patent/EP2508679B1/de
Publication of EP2508679A1 publication Critical patent/EP2508679A1/de
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Publication of EP2508679B1 publication Critical patent/EP2508679B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers

Definitions

  • the present invention relates to a manhole cover for an underground structure, such as a sewer for example, said cover comprising a frame fixed to the ground and a movable lid.
  • the frame has a passage opening with a non-circular inner edge which however has a span in any direction equivalent to a pre-established diameter sufficient to allow the passage of a person. In many places, this equivalent diameter is established by regulations.
  • Manhole covers for underground structures of the type comprising a frame and a lid, are well known in the state of the art.
  • the frame is suitable for being fixed to the ground in relation to said manhole and comprises a passage opening to provide access therethrough, and the lid is configured to be coupled to the frame covering said passage opening.
  • Patent US-A-4840514 discloses a cover of the type described above in which the lid and the frame comprise respective hinge elements cooperating to allow rotating the lid with respect to the frame about a horizontal axis between a closed position, in which the lid is coupled to the frame covering the passage opening, and an open position, in which the lid is inclined backwards at a certain angle in relation to a vertical position thus leaving the passage opening clear.
  • the lid is stable in said open position.
  • the hinge elements allow the lid to be separated from the frame by moving it vertically upwards.
  • the frame and/or the lid include a notch in which an end of a crowbar is inserted when the lid is in the closed position to allow the start of opening the lid.
  • the lid Once the opening has started, the lid must be gripped with the hands to manually lift it up to the open position, which, due to the relatively heavy weight of the lid, requires a great effort and involves a serious risk of getting ones' fingers caught.
  • Patent US-A-4650232 describes an especially designed tool for being used as a crowbar to start opening the lid of a manhole cover for an underground structure and as a lever arm to lift the lid and drag it out of the passage opening, though in this case the lid is not hinged to the frame.
  • a drawback of this tool is that it is considerably large sized and must be transported to the location of the cover to be opened.
  • Patent US-A-5911537 discloses a lid for a manhole cover for an underground structure having a thickness that progressively decreases from the center towards the periphery to provide the lid with sufficient resistance to withstand rolling transit when the cover is installed, for example, in a road.
  • a drawback of this solution is that it considerably increases the weight of the lid.
  • Patent EP-A-1769125 describes a lid for a manhole cover of an underground structure comprising a relatively thin plate provided with a structure of ribs projecting from a lower surface of the plate.
  • the structure of ribs comprises inner ribs connected at their ends forming a regular hexagon and radial ribs extending from the vertexes of said hexagon to the periphery of the plate.
  • the inner ribs have a determined height, and the height of the radial ribs progressively decreases from the inner ribs to the periphery.
  • the mentioned patent EP-A-1769125 also describes pressure closure members comprising a protrusion located at the free end of a spring arm connected to the lid and cooperating with a corresponding protrusion formed in the frame to retain the lid in the closed position with respect to the frame.
  • a drawback of these pressure closure members is that they are located in a position that is diametrically opposed to the hinge device, and they are unable to retain the lid pressed against the frame in the area adjacent to the hinge. This can be the cause of noises produced by the play of the hinge elements when the lid is passed over by rolling transit.
  • NL 7 114 782 A discloses a manhole cover according to the preamble of claim 1.
  • both the frame and the lid for manhole covers of underground structures are made of ductile cast steel, which, in combination with the dimensions necessary to provide a passage opening sufficient to allow the passage of a person, means that the weight of the lid and of the frame is considerably high.
  • the passage opening of the frame is generally circular and its magnitude is determined by a minimum diameter, generally established by regulations, sufficient to allow the passage of a person.
  • the present invention contributes to mitigating the foregoing and other drawbacks by providing a manhole cover for an underground structure of the type comprising a frame and a lid, where said frame is configured to be fixed to said manhole and comprises a passage opening sized to allow the passage of a person therethrough, and one or more seats to bear said lid covering said passage opening.
  • the cover of the present invention is characterized in that the passage opening of the frame has an inner edge in the form of a first polygon having convex curved sides in which a first distance between two first parallel geometric lines tangent to opposite points of said inner edge is never less than a pre-established equivalent diameter sufficient to allow the passage of a person no matter what the direction of said two first parallel lines, and the lid has an outer edge in the form of a second polygon having convex curved sides geometrically similar to said first polygon having convex curved sides.
  • the inner edge of the passage opening of the frame has the form of a first non-circular curve of constant width, in which said first distance between two first parallel geometric lines tangent to opposite points of said inner edge is constant no matter what the direction of said two first parallel lines
  • the outer edge of the lid has the form of a second non-circular curve of constant width, in which a second distance between two second parallel geometric lines tangent to opposite points of said outer edge is constant no matter what the direction of said two second parallel lines, where said first and second curves of constant width are geometrically similar.
  • the aforementioned first distance between said two first parallel geometric lines tangent to opposite points of the inner edge of the passage area of the frame is equivalent to the diameter of the passage area of the frame
  • said second distance between the two second parallel geometric lines tangent to opposite points of the outer edge of the lid is equivalent to the diameter of the outer edge of the lid
  • said first and second curves of constant width are respectively first and second regular polygons having geometrically similar convex curved sides, preferably with rounded vertexes in a geometrically similar manner.
  • Any curve of constant width defined by a regular polygon having curved sides, either with or without rounded vertexes, has a perimeter and area that are less than the perimeter and area of a circumference of equivalent diameter.
  • the frame of the cover of the present invention with the inner edge of the passage opening in the form of the first curve of constant width has a perimeter and area that are less than that of a circular frame of equivalent diameter. Accordingly, to manufacture the frame of the cover of the present invention a smaller amount of material will be necessary compared to a conventional circular frame of equivalent diameter, and its weight will be less.
  • the lid of the cover of the present invention with the outer edge in the form of the second curve of constant width has a perimeter and area that are less than that of a circular lid of equivalent diameter. Accordingly, to manufacture the lid of the cover of the present invention a smaller amount of material will be necessary compared to a conventional circular lid of equivalent diameter, and its weight will be less.
  • the base polygons for the first and second curves of constant width are selected from first and second equilateral triangles, first and second regular pentagons and first and second regular heptagons.
  • the first and second curves of constant width are pentagons having geometrically similar convex curved sides, and more preferably pentagons having geometrically similar convex curved sides and rounded vertexes. The triangle is discarded as the base polygon because it provides an excessive reduction of the passage area and the heptagon and other polygons having a larger number of sides has been discarded because they provide insufficient weight reduction.
  • said second distance or second equivalent diameter of the outer edge of the lid is greater than said first distance or first equivalent diameter of the inner edge of the passage opening of the frame, which assures that in no position will the lid be able to pass through the passage opening of the frame.
  • the lid has an extendable handle installed on an inner face thereof which can be moved between a retracted position, in which said extendable handle does not project from the outer edge of the lid, and an extended position, in which the extendable handle projects from the outer edge of the lid. Therefore, when the extendable handle is in the retracted position, the lid with the extendable handle can be placed in the closed position with respect to the frame.
  • the lid is articulated to the frame by a hinge device and when the extendable handle is in said extended position, it provides a grip member and a lever arm on one side of the lid opposite said hinge device which allows lifting the lid, rotating it about a horizontal axis with respect to the frame applying less force than what would be necessary without the extendable handle.
  • the frame preferably comprises lower pressure closure members and the lid comprises other corresponding upper pressure closure members.
  • the aforementioned upper pressure closure members of the lid lock with said lower pressure closure members of the frame retaining the lid in the closed position with respect to the frame.
  • the lid can be placed in an ajar position, in which the upper pressure closure members of the lid are supported on the lower pressure closure members of the frame, whereby the lid stays in said ajar position with sufficient clearance with respect to the frame to allow the extendable handle to be gripped and moved between said retracted and extended positions without risk of getting ones' fingers caught.
  • the lid and/or the frame have a recess configured to receive an end of a conventional crowbar that can be used to move the lid from the closed position to the ajar position.
  • At least one of the lower pressure closure members of the frame and a corresponding one of the upper pressure closure members of the lid in the cover of the present invention are located adjacent to the hinge device.
  • the mutually locked upper and lower pressure closure members keep the lid pressed against the frame also at the side corresponding to the hinge device and thereby prevent noises produced by the play of the elements of the hinge device when the lid is passed over by rolling transit.
  • the second distance or second equivalent diameter of the outer edge of the lid is slightly less than said first distance or first equivalent diameter of the inner edge of the passage opening of the frame, and the lid comprises protrusions projecting radially from the outer edge thereof.
  • the frame comprises box-shaped elements located adjacent to and above the inner edge of the passage opening, and the aforementioned protrusions of the lid fit in said box-shaped elements of the frame when the lid is in a closed position with respect to the frame.
  • the lid is articulated to the frame by a hinge device, and one of the protrusions of the lid, which is located on one side of the lid opposite said hinge device, has a recess configured to receive an end of a conventional crowbar which can be used to start opening the lid when it is in the closed position.
  • the lid has three of said protrusions distributed regularly around the outer edge thereof and peripheral ribs projecting from an inner face of said protrusions and extending therealong parallel to the outer edge of the lid.
  • inner ribs which are connected at their ends forming a polygon centered with respect to the outer edge of the lid, and three pairs of intermediate ribs.
  • the two intermediate ribs of each pair are connected at one of their ends to said inner ribs and at their other end to opposite ends of one of said peripheral ribs of a corresponding protrusion.
  • the height of the inner ribs is greater than the height of the peripheral ribs, and the height of the intermediate ribs progressively decreases from the inner ribs to the peripheral ribs.
  • the peripheral ribs When the lid is in the closed position, the peripheral ribs are supported on the seats formed in the box-shaped elements of the frame, and the intermediate ribs transmit the loads applied on the lid, for example by the rolling transit, to the peripheral ribs and to the frame.
  • This arrangement of reinforcement ribs has been proven to provide the lid with greater strength against forces perpendicular to the upper surface thereof compared to lids with ribs arranged in radial directions distributed at equal angular intervals around it.
  • the polygon formed by the inner ribs is a regular hexagon and the two intermediate ribs of each pair are mutually parallel.
  • both the frame and the lid of the cover of the present invention are one-piece bodies obtained by molding ductile cast steel.
  • reference numeral 100 generally designates a cover (shown as a whole in Figs. 1 and 2 ) according to a first embodiment of the present invention, which comprises a frame 10 (shown individually in Figs. 3 to 6 ) and a lid 50 (shown individually in Figs. 7 to 11 ).
  • the cover 100 is provided for covering a manhole of an underground structure, such as a sewer network (not shown).
  • the aforementioned frame 10 is configured to be fixed to said manhole of the underground structure.
  • the frame 10 comprises a perimetral tubular wall 19 defining a passage opening 11 and a perimetral fixing flange 20 extending outwards from a lower end of said perimetral tubular wall 19.
  • the perimetral fixing flange 20 has openings for reducing weight and fixing holes 13 for installing screws or the like by means of which the frame 10 is fixed to the underground structure in relation to said manhole.
  • the passage opening 11 of the frame 10 which is sized to allow the passage of a person therethrough, has an inner edge 14 in the form of a first non-circular curve of constant width, in which a first distance D1 between two first parallel geometric lines L1a, L1b tangent to opposite points of said inner edge 14 is constant no matter what the direction of said two first parallel lines L1a, L1b.
  • This first distance D1 is equivalent to a diameter of the inner edge 14 of the passage opening 11 of the frame 10.
  • the aforementioned first curve of constant width defined by the inner edge 14 of the passage opening 11 of the frame 10 is a first regular pentagon having convex curved sides and rounded vertexes, though alternatively other curves of constant width are within the scope of the present invention.
  • the perimetral tubular wall 19 of the frame 10 has a substantially vertical upper portion that follows the outline of the first curve of constant width, and a downwardly and outwardly inclined lower portion defining a transition between the outline of the first curve of constant width at the upper end and a substantially circular outline at the lower end, where it connects with the perimetral fixing flange 20. Between the perimetral tubular wall 19 and the perimetral fixing flange 20 are arranged reinforcement gussets 22.
  • the perimetral tubular wall 19 of the frame 10 defines three box-shaped elements 15 located adjacent to and above the inner edge 14 of the passage opening 11, and distributed at equal angular intervals around the frame. These box-shaped elements 15 are open in the upper portion and have bottom walls forming seats 12 bearing the lid 50 when it is in a closed position covering the passage opening 11, as will be explained below.
  • the bottom walls of the box-shaped elements are reinforced in the lower portion by gussets 21
  • the frame likewise defines a conventional type hinge element 17 configured to cooperate with another hinge element 60 formed in the lid 50.
  • the aforementioned hinge element 17 of the frame 10 is located in a position diametrically opposed to one of the box-shaped elements 15.
  • the lid 50 comprises a cover plate 61 having an outer edge 51 in the form of a second non-circular curve of constant width, in which a second distance D2 between two second parallel geometric lines L2a, L2b tangent to opposite points of said outer edge 51 is constant no matter what the direction of said two second parallel lines L2a, L2b.
  • This second distance D2 is equivalent to a diameter of the outer edge 51 of the lid 50.
  • the second curve of constant width of the lid 50 is geometrically similar to the first curve of constant width of the frame 10, therefore in the embodiment shown the second curve of constant width of the lid 50 is a pentagon having convex curved sides and rounded vertexes.
  • the second distance D2 equivalent to the outer diameter 51 of the lid 50 is slightly less than the first distance D1 equivalent to the diameter of the inner edge 14 of the passage opening 11 of the frame 10, such that the cover plate 61 of the lid fits inside the upper portion of the perimetral tubular wall 19 of the frame 10.
  • the cover plate 61 has an upper surface that is substantially flush with an upper edge of the perimetral tubular wall 19 of the frame 10 when the lid 50 is in a closed position.
  • the aforementioned upper surface of the cover plate 61 has a pattern of non-slip projections 62 and optionally one or more embossed inscriptions (not shown) in clearings of said pattern of non-slip projections 62.
  • the lid 50 comprises protrusions 55 projecting radially from the outer edge 51 thereof and a conventional hinge element 60 which also projects from the outer edge 51 in a position diametrically opposed to one of said protrusions 15.
  • the protrusions 55 of the lid 50 fit in said box-shaped elements 15 of the frame 10 when the lid 50 is in a closed position with respect to the frame 10 ( Fig. 2 ) and the hinge element 60 is inserted in the aforementioned hinge element 17 of the frame 10.
  • the cooperation of the hinge elements 17, 60 forms a hinge device which allows rotating the lid 10 about a horizontal axis with respect to the frame 10 between a closed position ( Figs.
  • the hinge elements 17, 60 allow the lid 50 to be separated from the frame 10 by moving it vertically upwards.
  • the lid 50 of this first embodiment has three of said protrusions 55 distributed regularly around the outer edge 51 at angular intervals of 120°.
  • the protrusion 55 of the lid 50 which is in a position diametrically opposed to the hinge element 17 has a recess 56 configured to receive an end of a crowbar when the lid 50 is in the closed position. This crowbar is used to start opening the lid 50 as is conventional.
  • the lid 50 includes an arrangement of reinforcement ribs projecting from a lower surface of the cover plate 61.
  • These reinforcement ribs include peripheral ribs 57 projecting from an inner face of said protrusions 55 and extending therealong parallel to the outer edge 51, inner ribs 58 which are connected to one another at their ends forming a hexagon centered with respect to the outer edge 51, and three pairs of intermediate ribs 59.
  • the two intermediate ribs 59 of each pair are mutually parallel and have respective inner ends connected to two adjacent vertexes of the hexagon formed by said inner ribs 58 and respective outer ends connected to opposite ends of one of said peripheral ribs 57 of one of the protrusions 55.
  • the inner ribs 58 have a determined height ( Fig. 11 ), the peripheral ribs 57 have a height less than the height of the inner ribs 58, and the intermediate ribs 59 have at their inner ends a height substantially equal to the height of the inner ribs 58 and at their outer ends a height substantially equal to the height of the peripheral ribs 57.
  • the height of the intermediate ribs 59 progressively decreases from their inner ends to their outer ends.
  • the peripheral ribs 57 are supported on the seats 12 formed in the box-shaped elements 15 of the frame 10, and the intermediate ribs 59 efficiently transmit the loads applied on the cover plate 61 of the lid 50 to the peripheral ribs 57 and to the frame 10.
  • reference number 200 generally designates a cover (shown as a whole in Figs. 12 to 15 , 26 and 27 ) according to a second embodiment of the present invention, which comprises a frame 10 (shown individually in Figs. 16 to 18 ), a lid 50 (shown individually in Figs. 19 to 25 ), and an extendable handle 70 (shown in Figs. 15 , 26 and 27 ).
  • the cover 100 is provided for covering a manhole of an underground structure, such as a sewer network (not shown).
  • the frame 10 comprises a perimetral tubular wall 19 formed around a passage opening 11 and a perimetral fixing flange 20 extending outwards from a lower end of said perimetral tubular wall 19.
  • the perimetral fixing flange 20 has fixing holes 13.
  • a seat 12 ( Figs. 17 and 18 ) extending along the entire perimeter of the frame 10 is formed between the perimetral tubular wall 19 and an inner edge 14 of the passage opening.
  • the aforementioned seat 12 is configured to house an annular rubber seal 75 ( Figs. 13 and 14 ).
  • the aforementioned inner edge 14 of the passage opening 11 of the frame 10 has the form of a first non-circular curve of constant width, in which a first distance D1 between two first parallel geometric lines L1a, L1b tangent to opposite points of said inner edge 14 is constant no matter what the direction of said two first parallel lines L1a, L1b.
  • This first distance D1 is equivalent to a diameter of the inner edge 14 of the passage opening 11 of the frame 10.
  • the aforementioned first curve of constant width defined by the inner edge 14 of the passage opening 11 of the frame 10 is a first regular pentagon having convex curved sides and rounded vertexes, though alternatively other curves of constant width are within the scope of the present invention.
  • the perimetral tubular wall 19 of the frame 10 has a substantially vertical upper portion that follows the outline of the first curve of constant width, and a downwardly and outwardly inclined lower portion defining a transition between the outline of the first curve of constant width at the upper end and a substantially circular outline at the lower end, where it connects with the perimetral fixing flange 20.
  • Reinforcement gussets 22 are arranged between the perimetral tubular wall 19 and the perimetral fixing flange 20.
  • the frame further comprises a conventional type hinge element 17 and a recess 18 configured to receive an end of a crowbar when the lid is in a closed position. Said hinge element 17 and said recess 18 are located in diametrically opposed positions of the frame.
  • the frame further includes lower pressure closure members 16 projecting slightly from the inner edge 14 and into the passage area 11. One of said lower pressure closure members 16 is located adjacent to the hinge element 17 ( Fig. 17 ).
  • the lid 50 comprises a cover plate 61 having an outer edge 51 in the form of a second non-circular curve of constant width, in which a second distance D2 between two second parallel geometric lines L2a, L2b tangent to opposite points of said outer edge 51 is constant no matter what the direction of said two second parallel lines L2a, L2b.
  • This second distance D2 is equivalent to a diameter of the outer edge 51 of the lid 50.
  • the second curve of constant width of the lid 50 is geometrically similar to the first curve of constant width of the frame 10, therefore in the embodiment shown the second curve of constant width of the lid 50 is a pentagon having convex curved sides and rounded vertexes.
  • the second distance D2 equivalent to the outer diameter 51 of the lid 50 is greater than the first distance D1 equivalent to the diameter of the inner edge 14 of the passage opening 11 of the frame 10 and slightly less than the inner outline of the upper portion of the perimetral tubular wall 19 of the frame 10, such that the cover plate 61 of the lid fits inside the upper portion of the perimetral tubular wall 19 of the frame 10 but it is impossible for it to pass through the passage opening 11.
  • the cover plate has a lower ridge 63 along its perimeter, and this lower ridge 63 of the lid 50 is supported on the rubber seal 75 arranged in the seat 12 of the frame ( Figs. 13 and 14 ).
  • the cover plate 61 has an upper surface which is substantially flush with an upper edge of the perimetral tubular wall 19 of the frame 10 when the lid 50 is in a closed position.
  • the aforementioned upper surface of the cover plate 61 has a pattern of non-slip projections 62 and optionally one or more embossed inscriptions (not shown) in clearings of said pattern of non-slip projections 62.
  • the lid 50 comprises a conventional hinge element 60 projecting from the outer edge 51 and a projection 65 also projecting from the outer edge 51 in a position diametrically opposed to the hinge element 60.
  • the hinge element 60 is inserted in the aforementioned hinge element 17 of the frame 10 and said projection 65 is partially housed in the recess 18 of the frame 10 when the lid is in a closed position.
  • the projection 65 cooperates with the aforementioned crowbar for the start of opening the lid.
  • the cooperation of the hinge elements 17, 60 forms a hinge device which allows rotating the lid 10 about a horizontal axis with respect to the frame 10 between a closed position ( Figs.
  • the hinge elements 17, 60 allow the lid 50 to be separated from the frame 10 by moving it vertically upwards.
  • the lid 50 includes an arrangement of reinforcement ribs projecting from a lower surface of the cover plate 61.
  • These reinforcement ribs include inner ribs 58 which are connected to one another at their ends forming a hexagon centered with respect to the outer edge 51, and six radial ribs 64 distributed regularly at angular intervals of 60° and connected at their inner ends to vertexes of the hexagon formed by said inner ribs 58.
  • the inner ribs 58 have a determined height ( Figs. 20 and 21 ), and the height of the radial ribs 64 progressively decreases from their inner ends, where they have a height substantially equal to the height of the inner ribs 58, towards the periphery.
  • the lid 50 further comprises three elastic arms 66 connected at one of their ends to the inner face of the cover plate 61 and having at their free ends corresponding upper pressure closure members 54 locking with the aforementioned lower pressure closure members 16 of the frame 10 when the lid 50 is in the closed position.
  • the locking of the lower and upper pressure closure members 16, 54 retains the lid 50 in said closed position pressed against the rubber seal 75 installed in the frame 10 even in a region corresponding to the hinge device 17, 60, thus preventing possible noises when being passed over due to the inevitable play in the hinge device 17, 60.
  • the lid 50 can be placed in an ajar position, in which the upper pressure closure members 54 of the lid 50 are supported on the lower pressure closure members 16 of the frame 10 to stably keep the lid 50 in said ajar position.
  • the upper pressure closure members 54 of the lid 50 have support surfaces 68 located at different heights, the lower they are the further the upper pressure closure members 54 are from the hinge device 17, 60 ( Figs. 14 , 23 and 24 ).
  • the lid 50 has an extendable handle 70 installed on an inner face thereof comprising a grip member 71 connected to a pair of sliding arms 72, which are inserted such that they can slide in corresponding holes 53 formed in protrusions of said inner face of the lid 50, such as the radial ribs 64 for example.
  • Each sliding arm 72 has a stop 73 at a free end thereof which prevents said free end from passing through the corresponding hole 53. Therefore, the extendable handle 70 can be moved between a retracted position ( Fig. 15 ), in which said extendable handle 70 does not project from the outer edge 51 of the lid 50, and an extended position ( Figs. 26 and 27 ), in which the extendable handle 70 projects from the outer edge 51 of the lid 50.
  • One of the radial ribs 64 has a notch 67 in which the grip member 71 is housed and retained when the extendable handle 70 is in the retracted position ( Figs. 13 and 22 ).
  • the extendable handle 70 extends in a direction opposite to the hinge device 17, 60.
  • the lid When the lid is arranged in the ajar position ( Figs. 26 and 27 ), there is sufficient clearance between the lid 50 and the frame 10 to allow the extendable handle 70 to be gripped and moved between said retracted and extended positions with complete safety.
  • the extendable handle 70 When the extendable handle 70 is in the extended position, it provides a lever arm on one side of the lid 50 opposite said hinge device 17, 60.
  • the extendable handle 70 is sized such that when it is in the extended position ( Fig. 27 ), a distance X2 from the grip member 71 of the extendable handle 70 to said axis of rotation E is more than two times greater than a distance X1 from said center of mass M to the axis of rotation E.
  • the extendable handle can also be used for handling the lid 50 when it is separated from the frame 10.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Claims (15)

  1. Schachtabdeckung für eine unterirdische Struktur, der Art umfassend einen Rahmen (10) und einen Deckel (50), in der der genannte Rahmen (10) dazu ausgebildet ist, an den genannten Schacht befestigt zu werden und eine Durchgangsöffnung (11) umfasst, um Zugang durch denselben bereitzustellen, und mindestens einen Sitz (12), um den genannten Deckel (50), welcher die genannte Durchgangsöffnung (11) abdeckt, abzustützen, dadurch gekennzeichnet, dass die Durchgangsöffnung (11) des Rahmens (10) einen inneren Rand (14) in Form eines ersten Polygons hat, welches konvexe gebogene Seiten aufweist, in welchen ein erster Abstand (D1) zwischen zwei ersten parallelen geometrischen Linien (L1a, L1b), die tangential zu entgegengesetzten Punkten des genannten inneren Randes (14) sind, nie kleiner als ein vorbestimmter äquivalenter Durchmesser ist, der genügt, um den Durchgang einer Person zu ermöglichen, unabhängig von der Richtung der genannten zwei ersten parallelen Linien (L1a, L1b), und dass der Deckel (50) einen äußeren Rand (51) in Form eines zweiten Polygons hat, welches konvexe gebogene Seiten aufweist, die dem genannten ersten Polygon mit konvexen gebogenen Seiten geometrisch ähnlich ist.
  2. Schachtabdeckung nach Anspruch 1, dadurch gekennzeichnet, dass das genannte erste Polygon mit konvexen gebogenen Seiten eine erste nicht kreisförmige Kurve konstanter Breite ist, in welcher der genannte erste Abstand (D1) konstant ist, unabhängig von der Richtung der genannten zwei ersten parallelen Linien (L1a, L1b), und dass das genannte zweite Polygon mit konvexen gebogenen Seiten die Form einer zweiten nicht kreisförmigen Kurve konstanter Breite hat, in welcher ein zweiter Abstand (D2) zwischen zwei zweiten parallelen geometrischen Linien (L2a, L2b), die tangential zu entgegengesetzten Punkten des genannten äußeren Randes (51) sind, konstant ist, unabhängig von der Richtung der genannten zwei zweiten parallelen Linien (L2a, L2b).
  3. Schachtabdeckung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das genannte erste und das genannte zweite Polygon mit konvexen gebogenen Seiten reguläre Pentagone mit konvexen gebogenen Seiten sind.
  4. Schachtabdeckung nach Anspruch 3, dadurch gekennzeichnet, dass die genannte reguläre Pentagone mit konvexen gebogenen Seiten abgerundete Scheitel haben.
  5. Schachtabdeckung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der genannte zweite Abstand (D2) größer als der genannte erste Abstand (D1) ist und dass sich der genannte Sitz (12) des Rahmens (10), auf welchem ein Umfangsbereich des Deckels (50) abgestützt ist, entlang eines Umfangsbereiches außerhalb des inneren Randes (14) der Durchgangsöffnung (11) erstreckt.
  6. Schachtabdeckung nach Anspruch 5, dadurch gekennzeichnet, dass der Deckel (50) einen streckbaren Griff (70) aufweist, welcher an der inneren Seite desselben eingebaut ist, der zwischen einer eingezogenen Stellung, in welcher der genannte streckbare Griff (70) nicht von dem äußeren Rand (51) des Deckels (50) hervorsteht, und einer gestreckten Stellung, in welcher der streckbare Griff (70) von dem äußeren Rand (51) des Deckels (50) hervorsteht, bewegt werden kann.
  7. Schachtabdeckung nach Anspruch 6, dadurch gekennzeichnet, dass der Deckel (50) an dem Rahmen (10) durch eine Scharniervorrichtung (17, 60) angelenkt ist und wenn sich der streckbare Griff (70) in der genannten gestreckten Stellung befindet, stellt er einen Hebelarm auf einer Seite des Deckels (50), die der genannten Scharniervorrichtung (17, 60) entgegengesetzt ist, bereit.
  8. Schachtabdeckung nach Anspruch 7, dadurch gekennzeichnet, dass der Deckel (50) einen Massenzentrum (M) hat, dass die Scharniervorrichtung (17, 60) eine Drehachse (E) hat und dass der streckbare Griff (70) ein Greifelement (71) hat, und wenn sich der streckbare Griff (70) in der gestreckten Stellung befindet, ist ein Abstand (P2) von dem genannten Greifelement (71) zur genannten Drehachse (E) mehr als zweimal größer als ein Abstand (P1) von dem genannten Massenzentrum (M) zur Drehachse (E).
  9. Schachtabdeckung nach Anspruch 8, dadurch gekennzeichnet, dass das Greifelement (71) des streckbaren Griffs (70) an einem Gleitarm (72) angeschlossen ist, der so eingesetzt ist, dass er in ein entsprechendes, in einem Vorsprung der genannten inneren Seite des Deckels (50) gebildetes Loch (53) gleiten kann, und dass ein Anschlag (73) in einem freien Ende des genannten Gleitarms (72) verhindert, dass das genannte freie Ende durch das genannte Loch (53) durchgeht.
  10. Schachtabdeckung nach Anspruch 7, dadurch gekennzeichnet, dass der Rahmen (10) Schließelemente (16) mit niedrigem Druck umfasst und der Deckel (50) entsprechende Schließelemente (54) mit hohem Druck umfasst, und dass der Deckel (50) in einer geschlossenen Stellung gebracht werden kann, in welcher sich die genannte Schließelemente (54) mit hohem Druck des Deckels (50) mit den genannten Schließelementen (16) mit niedrigem Druck des Rahmens (10) verriegeln, wobei der Deckel (50) in der genannten geschlossenen Stellung in Bezug auf den Rahmen verrastet wird, und in einer halboffenen Stellung gebracht werden kann, in welcher die Schließelemente (54) mit hohem Druck des Deckels (50) auf den Schließelementen (16) mit niedrigem Druck des Rahmens (10) abgestützt sind, um den Deckel (50) in der genannten halboffenen Stellung mit genug Freiraum in Bezug auf den Rahmen (10) zu halten, um zu ermöglichen, dass der streckbare Griff (70) ergriffen und zwischen der genannten eingezogenen Stellung und der genannten gestreckten Stellung bewegt wird.
  11. Schachtabdeckung nach Anspruch 7, dadurch gekennzeichnet, dass der Rahmen (10) Schließelemente (16) mit niedrigem Druck umfasst und dass der Deckel (50) entsprechende Schließelemente (54) mit hohem Druck umfasst, welche sich mit den genannten Schließelementen (16) mit niedrigem Druck des Rahmens (10) verriegeln, wobei der Deckel (50) in einer geschlossenen Stellung in Bezug auf den Rahmen (10) verrastet wird, wobei mindestens eines der Schließelemente (16) mit niedrigem Druck des Rahmens (10) und ein entsprechendes der genannten Schließelemente (54) mit hohem Druck des Deckels (50) an der genannten Scharniervorrichtung (17, 60) angrenzen.
  12. Schachtabdeckung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Rahmen (10) kastenförmige Elemente (15) umfasst, welche an den inneren Rand (14) der Durchgangsöffnung (11) angrenzen und über diesem angebracht sind, und dass der Deckel (50) Vorsprünge (55) umfasst, die radial von dem äußeren Rand (51) desselben hervorstehen, wobei die genannten Vorsprünge (55) des Deckels (50) in den genannten kastenförmigen Elementen (15) des Rahmens (10) passen, wenn sich der Deckel (50) in einer geschlossenen Stellung in Bezug auf den Rahmen (10) befindet.
  13. Schachtabdeckung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Rahmen (10) oder der Deckel (50) eine Aussparung (18, 56) aufweist, welche ausgebildet ist, um ein Ende einer Hebestange aufzunehmen, wenn sich der Deckel in einer geschlossenen Stellung befindet.
  14. Schachtabdeckung nach Anspruch 13, dadurch gekennzeichnet, dass der Deckel (50) an dem Rahmen (10) durch eine Scharniervorrichtung (17, 60) angelenkt ist, und dass die genannte Aussparung (18, 56) auf einer Seite des Deckels (50) angebracht ist, die der genannten Scharniervorrichtung (17, 60) entgegengesetzt ist.
  15. Schachtabdeckung nach Anspruch 12, dadurch gekennzeichnet, dass der Deckel (50) drei der genannten Vorsprünge (55) regelmäßig um den äußeren Rand (51) verteilt, Umfangsrippen (57), die von einer inneren Seite der genannten Vorsprünge (55) hervorstehen und sich entlang derselben parallel zum äußeren Rand (51) erstrecken, innere Rippen (58), die von einer inneren Seite des Deckels (50) hervorstehen und an ihren Enden unter Bildung eines Polygons verbunden sind, welches in Bezug auf den äußeren Rand (51) zentriert ist, und drei Paare von Zwischenrippen (59), die von der genannten inneren Seite des Deckels (50) hervorstehen, aufweist, wobei beide Zwischenrippen (59) jedes Paares an einem ihrer Enden an den genannten inneren Rippen (58) und an dem anderen Ende an entgegengesetzten Enden einer der genannten Umfangsrippen (57) eines entsprechenden Vorsprungs (55) verbunden sind.
EP20110380030 2011-04-05 2011-04-05 Deckel für einen Wartungsschacht Not-in-force EP2508679B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20110380030 EP2508679B1 (de) 2011-04-05 2011-04-05 Deckel für einen Wartungsschacht

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Application Number Priority Date Filing Date Title
EP20110380030 EP2508679B1 (de) 2011-04-05 2011-04-05 Deckel für einen Wartungsschacht

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EP2508679B1 true EP2508679B1 (de) 2013-09-25

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Publication number Priority date Publication date Assignee Title
CN105040739B (zh) * 2015-06-09 2017-01-18 长兴恒绵塑业有限公司 一种减震型窨井盖组件
SK8423Y1 (sk) * 2018-05-09 2019-05-06 Kovacik Daniel 5- a viacuholníkový kanalizačný poklop s výškovým nastavením

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7114782A (de) * 1971-10-27 1973-05-02
US4650232A (en) 1985-08-19 1987-03-17 Scott Perry Manhole cover lifter
ES2028773T3 (es) 1987-04-07 1992-10-16 Pont-A-Mousson S.A. Registro de calzada de bisagra en t.
US5911537A (en) 1997-02-06 1999-06-15 Pulver; Mark D. Parabolic cover for manhole
DE29821453U1 (de) * 1998-12-01 1999-03-04 Heinrich Meier Eisengieserei G Schachtabdeckung
FR2844296B1 (fr) * 2002-09-05 2004-11-19 Lefeuvre Sa Coiffe de protection pour puits ou forage
DE202004010995U1 (de) 2004-07-14 2005-11-17 Hydrotec Technologies Gmbh & Co. Kg Deckel einer Schachtabdeckung sowie Schachtabdeckung

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