EP0536247B1 - Schachtabdeckung - Google Patents

Schachtabdeckung Download PDF

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Publication number
EP0536247B1
EP0536247B1 EP91912278A EP91912278A EP0536247B1 EP 0536247 B1 EP0536247 B1 EP 0536247B1 EP 91912278 A EP91912278 A EP 91912278A EP 91912278 A EP91912278 A EP 91912278A EP 0536247 B1 EP0536247 B1 EP 0536247B1
Authority
EP
European Patent Office
Prior art keywords
frame
cover
sub
projection
assembly according
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.)
Expired - Lifetime
Application number
EP91912278A
Other languages
English (en)
French (fr)
Other versions
EP0536247A1 (de
Inventor
David Walter Norris
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.)
Norinco SA
Original Assignee
Selflevel AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Selflevel AG filed Critical Selflevel AG
Publication of EP0536247A1 publication Critical patent/EP0536247A1/de
Application granted granted Critical
Publication of EP0536247B1 publication Critical patent/EP0536247B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 and frame assembly comprising a frame which defines an access opening and a cover which cooperates with the frame to close the opening, the frame and the cover having respective sealing faces which extend completely around the opening and engage each other to provide a seal between the cover and the frame.
  • An assembly of this kind is hereinafter referred to as an assembly of the kind specified.
  • sealing face is the lowest face of the cover. If the cover is removed from the frame and is placed on a floor, the sealing face of the cover is likely to be contaminated, for example by adhesion of particles present on the floor. If the cover is replaced in the frame without being cleaned the contaminating particles will be trapped between the sealing faces of the frame and cover. This will impair the ability of the cover and frame to provide a proper seal. At least one of the sealing faces is usually presented by a relative soft element and in this case contaminating particles are likely to become embedded in the soft element so that this element is permanently damaged.
  • a downwardly facing sealing element is located in a peripheral channel of a manhole cover.
  • the manhole cover when assembled with the frame compresses the sealing element to establish a seal whilst also permitting a downwardly extending peripheral flange of the cover to engage the base of a peripheral channel provided in the frame.
  • the metal-to-metal engagement of the cover flange with the base of the frame channel is said to prevent rocking of the cover relative to the frame since such rocking, if it occurs, is said to accelerate the wearing out of the sealing element.
  • the sealing element should shrink or lose its resilience or otherwise deteriorate, its sealing effect could be at least partially lost since the metal-to-metal flange to channel-base engagement would preclude further sealing contact being established between the cover and the sealing element.
  • a manhole cover and frame assembly comprising a frame defining an access opening and a cover cooperable with the frame to close the opening, the frame and the cover having respective sealing faces extending completely around the opening and engaging one another to provide a seal between the cover and the frame when the cover and the frame are assembled together, and wherein the cover has at its underside at least one projection for bearing on a flat floor, when the cover is disassembled from the frame, to support the cover on the floor with the sealing face spaced from the floor, characterised in that a clearance is provided between the projection and the frame when the cover is assembled with the frame to close and seal the opening.
  • the frame preferably has a well to receive the projection of the cover and to retain a flowable composition and the projection preferably extends completely around the cover between the periphery of the cover and the scaling face of the cover. If the well is charged with a flowable composition and the projection is submerged or partly submerged in that composition, the flowable composition provides a further seal between the cover and the frame.
  • the frame of the assembly illustrated in Figures 1 and 2 of the accompanying drawings is a polygonal frame defining a polygonal access opening.
  • the access opening is rectangular.
  • Figure 1 shows a cross section through one side member only of the frame, this cross section being in a plane perpendicular to the length of that side member, and
  • Figure 2 shows a cross section in the same plane through a part of the cover.
  • the frame illustrated in Figure 1 is a rectangular frame defining a rectangular access opening.
  • the frame would typically be embedded in a floor, for example a concrete floor.
  • the access opening provides access to a chamber or other cavity beneath the floor.
  • the frame is fabricated from four rectilinear members which form respective sides of the frame. A transverse cross section through one of these members is shown at 10 in Figure 1 of the drawing.
  • the member 10 has a uniform transverse cross section along its entire length and the transverse cross section of the other members of the frame is the same as that of the member 10.
  • the frame member 10 comprises three components, namely a bar 11 which extends along the entire length of the frame member, a cap 12 which forms the uppermost part of the frame member and also extends along the entire length of that member and an elastomeric seal 13 mounted in a recess defined by the bar 11.
  • the other frame members comprise corresponding components and the bars of the frame members are united with each other by fusion.
  • the cover illustrated in Figure 2 is intended to close the access opening defined by the frame of Figure 1 and has a size and shape corresponding to those of the frame so that the cover can be received in the frame to rest on the seal 13.
  • the cover comprises a sub-frame 14 fabricated from four rectilinear members, one of which is shown in transverse cross section at 15. On an upper portion of each of these members, there is mounted a cap 16 corresponding to the cap 12 and at least one lifting block 17 is mounted on each of two of the sub-frame members, the lifting block having an upper surface which is substantially coplanar with the upper surface of the cap 16.
  • the cover further comprises a base plate 18 which rests on the sub-frame and a filling 19 of concrete or other setable material which also has an upper surface at the same height as the upper surface of the cap 16.
  • the filling may incorporate reinforcement and the reinforcement may rest on or be attached by fusion to an upstand 20 provided on the sub-frame.
  • the seal face 21 is flat and extends completely around the cover so that a seal is provided between the cover and the frame at the sealing face 21.
  • the sealing face 21 is preferably formed on a downwardly projecting rib to ensure that there is a vertical clearance between parts of the bar 11 adjacent to the seal 13, on the one hand, and corresponding parts of the sub-frame, on the other hand.
  • the sub-frame also includes a projection 22 which extends downwards beyond the sealing face 21, preferably by a distance of at least 3 mm and more preferably by a distance of at least 5 mm. Since the projection 22 is incorporated in each of the four main rectilinear members of the cover, the projection surrounds the sealing face 21 entirely. Alternatively, there could be substituted for the continuous projection 22 a plurality of legs spaced from each other around the cover.
  • the cover When the cover is removed from the frame and is placed on a flat floor, it rests on the floor by the projection 22 and the sealing face 21 is supported at a position well above the floor surface. Since the sealing face is surrounded by the projection 22, there is no substantial risk of particles present on the floor surface becoming adhered to the sealing face 21.
  • a well 23 for receiving the projection 22 with clearance when the cover is assembled with the frame.
  • the well may be charged with a flowable sealant in which the projection 22 is partly submerged, to provide a further seal between the frame and the cover.
  • the lifting block 17 is provided with a known formation for cooperation with known detachable lifting means for lifting the cover.
  • This lifting formation is at the top of the block and is therefore accessible when the cover is assembled with the frame.
  • the lifting block and the sub-frame 14 are provided with respective interfitting formations arranged for cooperation to transmit to the block a gravitational load on the sub-frame during lifting of the cover by means of the lifting block.
  • the formation 25 is an inwardly projecting rib and the formation 24 is a shoulder for engaging beneath this rib.
  • a further rib may be provided on the sub-frame above the rib 25 and a rib may be provided on the lifting block for engagement beneath this further rib of the sub-frame.
  • the formations 24 and 25 are at the outer face of the lifting block 17 at the inwardly facing surface of the lifting block, there are provided on the lifting block and sub-frame 14 further formations for cooperation to transfer gravitational load from the sub-frame to the lifting block.
  • These further formations comprise an outwardly projecting rib 26 on the upstand 20 and shoulders defining a channel 27 in the lifting block for receiving the rib 26.
  • the lifting block fits close to the upstand 20 and close to an outer wall of the sub-frame.
  • the lifting block is inserted into the member of the sub-frame prior to assembly of that member with other members of the sub-frame.
  • the lifting block is preferably fixed in position on the sub-frame by welding or by deformation of the sub-frame and/or of the lifting block.
  • Known anchoring means for anchoring the cover to the frame is provided in the region between the peripheral wall of the sub-frame, on the one hand, and the upstand 20 and projection 22, on the other hand. It will be noted that the anchoring means is spaced outwardly from the sealing faces of the cover and frame so that the anchoring means does not interfere with attainment of a proper seal between the cover and the frame.
  • the bar 11 and the main members of the sub-frame are conveniently formed by extrusion of a metal, for example aluminium.
  • the caps 12 and 16 also may be formed of metal by extrusion. Aluminium and brass are suitable materials for the caps.
  • the modified frame illustrated in Figure 3 and the modified cover of Figure 4 comprise parts corresponding to those of the frame and cover respectively shown in Figures 1 and 2.
  • such corresponding parts are identified by like reference numerals with the prefix 1.
  • the preceding description is deemed to apply to those corresponding parts and to the frame and cover of Figures 3 and 4, except for differences hereinafter mentioned.
  • the sub-frame 114 shown in Figure 4 has a projection 122 which extends downwards beyond the sealing face 121 and which surrounds the sealing face entirely. This projection enters the well 123 when the cover and frame of Figures 3 and 4 are assembled together.
  • the sub frame shown in Figure 4 comprises a further projection 130 which extends downwards beyond both the sealing face 121 and the projection 122.
  • the projection 130 lies at the periphery of a further well defined by the sub-frame 114. The bottom of this further well is closed by the base plate 118 and the well is occupied by concrete in the completed cover.
  • the projection 130 bears on that flat surface and maintains a clearance between the sealing face 121 and the flat surface.
  • the upstand 120 in addition to the outwardly projecting rib 126, a pair of inwardly projecting ribs which are spaced apart vertically. These ribs contribute to keying of the concrete infill to the sub-frame of the cover.
  • the cover shown in Figure 4 may be fitted with a cap corresponding to the cap 16 shown in Figure 2.

Landscapes

  • 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)
  • Escalators And Moving Walkways (AREA)
  • Elevator Door Apparatuses (AREA)

Claims (7)

  1. Eine Manlochdeckel- und rahmenanordnung mit einem eine Zugangsöffnung abgrenzenden Rahmen (10, 110) und einem Deckel (14, 1 14), der mit dem Rahmen zusammenwirken kann, um die Öffnung zu verschliessen, wobei der Rahmen und der Deckel jeweilige, sich vollständig um die Öffnung herum erstreckende Abdichtungsflächen (13, 113 und 21, 121) haben, die miteinander in Eingriff sind, um eine Abdichtung zwischen dem Deckel und dem Rahmen zu schaffen, wenn der Deckel und der Rahmen zusammengefügt sind, und bei welcher der Deckel an seiner Unterseite wenigstens einen Vorsprung (22, 130) hat, zur Abstützung an einem flachen Fussboden, wenn der Deckel von dem Rahmen abgenommen worden ist, um den Deckel auf dem Fussboden zu tragen, wobei die Abdichtungsfläche (21, 121) im Abstand von dem Fussboden liegt, dadurch gekennzeichnet, dass ein Spielraum zwischen dem Vorsprung und dem Rahmen vorgesehen ist, wenn der Deckel mit dem Rahmen zusammengefügt ist, um die Öffnung zu verschliessen und abzudichten.
  2. Eine Anordnung gemäss Anspruch 1, weiter dadurch gekennzeichnet, dass die Abdichtungsfläche (21, 121) des Deckels aus einem harten Werkstoff gebildet ist.
  3. Eine Anordnung gemäss dem einen oder dem anderen der Ansprüche 1 oder 2, weiter dadurch gekennzeichnet, dass die Abdichtungsfläche (13, 113) des Rahmens durch eine elastische Dichtung gebildet wird, die im bezug auf den Werkstoff aus welchem ein angrenzender Abschnitt des Rahmens gebildet ist, weich ist.
  4. Eine Anordnung nach Anspruch 3, weiter dadurch gekennzeichnet, dass die besagten Abdichtungsflächen (13, 113 und 21, 121) sich im Abstand nach innen von einem Umfang des Deckels ab befinden und das lösbare Verankerungsmittel, um den Deckel an dem Rahmen zu verankern zwischen den Abdichtungsflächen und den Umfang des Deckels vorgesehen sind.
  5. Eine Anordnung nach dem einen oder dem anderen der Ansprüche 3 oder 4, weiter dadurch gekennzeichnet, dass ein Vorsprung (22, 122) sich vollständig um den Deckel herum zwischen dem Umfang des Deckels und der Abdichtungsfläche des Deckels erstreckt und dass der Deckel eine Aushöhlung (23, 123) hat, um den Vorsprung aufzunehmen und die geeignet ist, eine fliessbare Zusammensetzung zurückzuhalten.
  6. Eine Anordnung gemäss irgendeinem der vorangehenden Ansprüche, weiter dadurch gekennzeichnet, dass der Deckel einen Unterrahmen und eine Vielzahl von Blöcken (17) aufweist, wobei jeder Block ein Hebeglied aufweist, zum Zusammenwirken mit abnehmbaren Hebemitteln, um den Deckel zu heben und wobei jeder Block und der Unterrahmen jeweilige ineinandergreifende Glieder (24, 27 und 25, 125, 26, 126) haben, die zusammenwirken, um die auf den Unterrahmen wirkende Schwerkraft auf die Blöcke während des Hebens des Deckels mittels der Hebeglieder der Blöcke zu übertragen.
  7. Eine Anordnung gemäss Anspruch 6, weiter dadurch gekennzeichnet, dass der Unterrahmen eine Aussenwand des Deckels aufweist, wobei ein erstes ineinandereingreifendes Glied (25, 125) an der Aussenwand gebildet ist, wobei ein zweites ineinandergreifendes Glied (26, 126) im Abstand von der Aussenwand liegt und wobei der Block ein drittes und ein viertes ineinandereingreifendes Glied (24, 27) zur zusammenwirkung jeweils mit dem ersten und dem zweiten ineinandergreifenden Glied hat.
EP91912278A 1990-06-26 1991-06-26 Schachtabdeckung Expired - Lifetime EP0536247B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9014161 1990-06-26
GB9014161A GB2245627B (en) 1990-06-26 1990-06-26 Manhole cover
PCT/GB1991/001037 WO1992000426A1 (en) 1990-06-26 1991-06-26 Manhole cover

Publications (2)

Publication Number Publication Date
EP0536247A1 EP0536247A1 (de) 1993-04-14
EP0536247B1 true EP0536247B1 (de) 1996-08-28

Family

ID=10678198

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91912278A Expired - Lifetime EP0536247B1 (de) 1990-06-26 1991-06-26 Schachtabdeckung

Country Status (6)

Country Link
EP (1) EP0536247B1 (de)
AU (1) AU8059491A (de)
DE (1) DE69121716T2 (de)
ES (1) ES2096654T3 (de)
GB (1) GB2245627B (de)
WO (1) WO1992000426A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2274668B (en) * 1993-01-27 1996-03-13 Francis Sidney Clark Manhole container units
DE29503441U1 (de) * 1995-03-01 1995-06-14 Passavant-Werke Ag, 65326 Aarbergen Stahlbeton-Abdeckung als Einzel-, Reihen- oder Flächenabdeckung
BE1016453A7 (nl) 2005-02-11 2006-11-07 Dvs Eurometaal Nv Gronddekselprofiel.
DE102008037929A1 (de) * 2008-08-14 2010-02-18 Lic Langmatz Gmbh Schachtabdeckung, insbesondere für einen Tunnelschacht

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE119697C (de) * 1900-01-01
GB2088446B (en) * 1980-11-27 1984-08-01 Brickhouse Dudley Mfg Manhole covers
FR2508953A1 (fr) * 1981-07-06 1983-01-07 Pont A Mousson Regard de chaussee
GB2116611B (en) * 1982-02-26 1985-08-07 Brickhouse Dudley Mfg Manhole frame and cover assembly
CH661465A5 (en) * 1983-12-07 1987-07-31 Rutschmann Ag Tool for inserting and lifting out a manhole cover
GB2185053B (en) * 1985-12-17 1988-12-14 Francis Sidney Clark An access cover frame
GB2188663A (en) * 1986-04-02 1987-10-07 Selflevel Covers Ag Cover and frame assemblies for manholes or access holes
FR2603631B1 (fr) * 1986-09-05 1989-06-02 Pont A Mousson Garniture d'etancheite pour regard de chaussee
BE1004360A3 (fr) * 1989-03-31 1992-11-10 Debergh Ludo Dispositif de fermeture etanche pour regard.

Also Published As

Publication number Publication date
ES2096654T3 (es) 1997-03-16
DE69121716T2 (de) 1997-04-17
WO1992000426A1 (en) 1992-01-09
GB9014161D0 (en) 1990-08-15
GB2245627B (en) 1994-03-23
AU8059491A (en) 1992-01-23
GB2245627A (en) 1992-01-08
EP0536247A1 (de) 1993-04-14
DE69121716D1 (de) 1996-10-02

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