EP0362103B1 - Regard de chaussée - Google Patents

Regard de chaussée Download PDF

Info

Publication number
EP0362103B1
EP0362103B1 EP89470018A EP89470018A EP0362103B1 EP 0362103 B1 EP0362103 B1 EP 0362103B1 EP 89470018 A EP89470018 A EP 89470018A EP 89470018 A EP89470018 A EP 89470018A EP 0362103 B1 EP0362103 B1 EP 0362103B1
Authority
EP
European Patent Office
Prior art keywords
manhole cover
cover according
liner
limb
frame
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
EP89470018A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0362103A1 (fr
Inventor
Alain Percebois
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.)
Pont a Mousson SA
Original Assignee
Pont a Mousson SA
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 Pont a Mousson SA filed Critical Pont a Mousson SA
Priority to AT89470018T priority Critical patent/ATE79658T1/de
Publication of EP0362103A1 publication Critical patent/EP0362103A1/fr
Application granted granted Critical
Publication of EP0362103B1 publication Critical patent/EP0362103B1/fr
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
    • E02D29/1427—Locking devices

Definitions

  • the present invention relates to a sealed lockable manhole cover having at most a single metal-metal contact between frame and pad.
  • the manhole covers must be silent. It is indeed very unpleasant for city dwellers to hear the noise of metal-metal contact between the frame and the manhole cover at each pass of a vehicle.
  • the seal between the frame and the buffer must be ensured and the extraction of the buffer must be impossible by vacuum during the passage of a vehicle or by internal thrust of water from the sanitation network.
  • a flexible material such as an elastomer or plastomer, for example, is often used, interposed between the frame and the pad.
  • the pad no longer rests on the metal collar of the frame, but on the lining, thus avoiding any metal-to-metal contact and even ensuring watertightness against runoff.
  • a buffer of high mass is often used, not necessary for the resistance taking into account noble materials such as ductile iron with spheroidal graphite.
  • Another solution to avoid accidental extraction of the buffer is to lock it on the frame by means of hooks.
  • hooks To ensure such locking, at least two pre-tightened hooks are required; however, the foundry manufacturing tolerances mean that at the time of locking, when one hook comes into contact with its support, the other is unlikely to do the same in synchronism, the contact between cast iron and cast iron offering no flexibility to catch up, except with an expensive device.
  • Such a look, if it is raw foundry has the drawback of "limping", that is to say, given that all supports are not necessarily in contact simultaneously, to pass from one support to the other when passing a vehicle, thus causing an unpleasant noise.
  • document FR-A-2 153 823 discloses a lockable manhole cover comprising a frame comprising a cylindrical skirt provided with an internal radial flange, and a pad resting on this flange by means of of an elastic gasket of general C section coming to fit on said flange, the pad being provided with at least one hooking lug capable of cooperating with a ramp for locking the frame situated opposite said paw.
  • the objective of the invention is to produce a lockable and watertight manhole cover having at most a single metal-metal contact between the frame and the pad and which is silent when a vehicle is passing.
  • the manhole cover according to the invention consists of a frame 1, an elastic lining 2 and a buffer 3.
  • the frame 1 has a support sole 4, horizontal, circular, from the inner periphery from which upwards a cylindrical skirt 5 delimiting a circular opening 6 of inner diameter D.
  • the frame 1 is provided with an external locking device 7 of known type.
  • the external locking device 7 is a bayonet.
  • the skirt 5 of the frame has an external projection delimited by two vertical faces 8 and 9, of height substantially equal to half that of the skirt 5, parallel and close to one another, connecting substantially at right angles at the upper half of the skirt 5 of the frame 1, the upper edge of the skirt 5 being continuous with the upper edges of the faces 8 and 9.
  • a vertical face 10, of the same height as the faces 8 and 9, of length L connects the free ends of the two said faces 8 and 9.
  • This external projection is closed downwards by a horizontal face 11 connecting to the skirt 5 of the frame, thus forming a substantially rectangular housing 12.
  • This housing 12 is partially closed upwards by a cover 13, integrally formed with the faces. 8 or 9 and 10, of length at least equal to L / 2, contained in the horizontal plane containing the upper edge of the skirt 5, adjoining one of the vertical faces 8 or 9 and half of the vertical face 10.
  • the lower face 13a of the cover 13, facing the housing 12, has a ramp in the direction tangential to the skirt 5, so that the section of said cover 13 increases as one approaches the face 8 or 9 to which it is connected.
  • the skirt 5 is provided with an internal collar 14, situated in the horizontal plane containing the horizontal face 11 of the locking device 7 and which is connected to said horizontal face 11.
  • the inner collar 14 thus delimits a circular opening of diameter D1 less than D.
  • the lower face 14a of said flange is provided with at least one groove or a shoulder of rectangular section 14b.
  • the lining 2 circular, closed, continuous, generally C-shaped, is made of an elastic material such as elastomer or plastomer.
  • It has a horizontal upper branch 15, a vertical branch 16 extending downward from one end of the branch 15, making an angle close to 90 ° with said branch 15, and a lower branch 17, horizontal, s extending under the branch 15 and making an angle close to 90 ° with the vertical branch 16.
  • the length of the upper 15 and lower 17 branches is less than the width of the flange 14 of the frame 1.
  • the length of the vertical branch 16 is such that the distance between the two faces facing the horizontal branches 15 and 17 or at most equal to the thickness of the collar 14.
  • the upper face of the branch 17, facing the branch 15 is provided with at least one tongue 17a of section identical to that of the groove or shoulder 14b with which the frame is provided.
  • the lining 2 can fit perfectly on the flange 14 of the frame.
  • the tongue 17a coming into coincidence with the groove 14b allows ideal positioning.
  • the lower end face 18 of the lining 2 thus formed has at least one locking ramp 19 making an angle ⁇ with the horizontal such that ⁇ is less than 20 ° and tg ⁇ is less than tg ⁇ , tg ⁇ being the coefficient of friction between the material in which the lining 2 is made, and that in which the pad 3 is made.
  • the radial section S of the lower branch 17 of the lining 2 is rectangular. Its height then increases regularly over a length 1 greater than the length L of the vertical face 10 of the external projection with which the frame is provided, equal to 3 L / 2 in the embodiment, then suddenly regains its initial height revealing thus a vertical face 20.
  • the direction of the locking ramp (s) 19 is such that its section S increases in the direction of rotation imposed by the bayonet.
  • the angle ⁇ between the two extreme locking ramps in no case exceeds 120 °.
  • the lining 2 delimits a circular opening of diameter D2 less than D1.
  • the pad 3 consists of a circular plate 21 having an upper face 22 furnished with non-slip patterns.
  • the lower face 23 of said pad is provided with a vertical flange 24, circular, projecting downwards, with an internal diameter D3 slightly smaller than the diameter of the opening delimited by the lining 2.
  • the pad 3 is provided with a radial tab 25, rectangular, of trapezoidal section symmetrical with that of the cover 13 of the frame locking device, of thin thickness substantially equal to half that of the plate 21, in continuity with the face lower 23 of said plate.
  • the dimensions of the radial tab 25 are, in known manner, such that when the pad is placed on the lining 2, said tab can penetrate into the housing 12 through the opening 28 formed next to the cover 13.
  • the flange 24 of the pad 3 is provided with at least one hooking tab 26, rectangular, the upper support face of which is contained in a horizontal plane situated between the plane containing the lower face 18 of the lining 2 when the height of section S is minimum and the plane containing said lower face 18 when section S is maximum.
  • the buffer has only one attachment tab 26, the latter is preferably diametrically opposite to the radial tab 25.
  • the angle ⁇ between the two end tabs does not exceed 120 ° and the angles ⁇ and ⁇ ′ between each end tab and the radial tab 25 are at least equal to 110 °.
  • angles ⁇ and ⁇ ′ are equal.
  • the lining 2 is fitted onto the flange 14 of the frame so that when the pad is placed by sliding the hooking tabs 26 under the lining 2, the radial tab 25 being located opposite the 'orifice formed above the housing 12, each latching tab 26 is located under the lining 2, in contact with said lining at the beginning of a locking ramp 19.
  • each hooking tab 26 cooperates with a corresponding locking ramp 19 of the lining 2.
  • the material in which the lining 2 is made is elastic, the latter is compressed and crushed at the level of the latching tab (s) 26. Given the anchoring of the lining on the flange 14 of the frame by means of the groove 14b-tongue device 17a, the latter does not rotate with the buffer.
  • An additional device for stopping the rotation of the tampon can be provided if the conditions of use are particularly severe.
  • FIG. 5 An alternative embodiment shown in FIG. 5 consists in replacing the external locking device 7 by an internal hooking device.
  • the frame 1 is circular, provided with a support sole 4, circular and horizontal, with a cylindrical skirt 5 and an inner collar 14 identical to that described in the preferred embodiment.
  • the lining 2 is also identical to that described in the preferred embodiment.
  • the pad 3 has at least one attachment tab 26 identical to that described in the preferred embodiment and the radial tab 25 is replaced by a removable hook 27 making it possible to lock the pad, by cooperating with the attachment tabs 26, passing it under the trim 2.
  • Such an embodiment makes it possible to obtain a perfectly circular look without any metal-metal contact between the frame and the pad.
  • a second alternative embodiment shown in FIG. 6 is composed of a circular frame 1, the skirt 5 of which is similar to that described in the preferred embodiment, except that it is ovoid and that the opening delimited by said skirt has a concave bulge 29 thus causing a occasional increase in its diameter D1.
  • the lining 2 is similar to that described in the preferred embodiment, except that it is also ovoid and that it comprises at least two locking ramps 19, preferably diametrically opposite, one of the locking ramps 19 being located, when the trim is mounted on the frame, in the zone corresponding to the junction between the circular part of the skirt 5 and the bulge 29.
  • the pad 3 is circular and provided with at least two attachment tabs 26 arranged like the locking ramps 19 of the lining so that the conditions relating to the angles ⁇ , ⁇ and ⁇ ′ are met, the radial tab 25 of the preferred mode being replaced by a lug 26.
  • the lining 2 is fitted onto the flange 14 and the pad is placed by sliding the latch (s) 26 located in the circular area of the skirt 5 of the frame under the liner 2.
  • the remaining latch 26 is then look of the bulge 29 of the opening of the skirt 5 of the frame and can pass under said skirt.
  • each hooking lug 26 borrows its respective locking ramp 19 from the lining 2 and compresses it.

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)
  • Rear-View Mirror Devices That Are Mounted On The Exterior Of The Vehicle (AREA)
  • Adornments (AREA)
  • Sewing Machines And Sewing (AREA)
  • Flexible Shafts (AREA)
  • Protection Of Plants (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)
  • Fuel Cell (AREA)
  • Closures For Containers (AREA)
  • Insulating Bodies (AREA)
  • Sealing Devices (AREA)
EP89470018A 1988-09-29 1989-09-15 Regard de chaussée Expired - Lifetime EP0362103B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89470018T ATE79658T1 (de) 1988-09-29 1989-09-15 Schachtabdeckung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8812934A FR2636991B1 (fr) 1988-09-29 1988-09-29 Regard de chaussee
FR8812934 1988-09-29

Publications (2)

Publication Number Publication Date
EP0362103A1 EP0362103A1 (fr) 1990-04-04
EP0362103B1 true EP0362103B1 (fr) 1992-08-19

Family

ID=9370642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89470018A Expired - Lifetime EP0362103B1 (fr) 1988-09-29 1989-09-15 Regard de chaussée

Country Status (9)

Country Link
EP (1) EP0362103B1 (enrdf_load_stackoverflow)
AT (1) ATE79658T1 (enrdf_load_stackoverflow)
DE (1) DE68902529T2 (enrdf_load_stackoverflow)
DK (1) DK473689A (enrdf_load_stackoverflow)
ES (1) ES2032723T3 (enrdf_load_stackoverflow)
FR (1) FR2636991B1 (enrdf_load_stackoverflow)
GR (1) GR3005446T3 (enrdf_load_stackoverflow)
NO (1) NO893844L (enrdf_load_stackoverflow)
PT (1) PT91830B (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002301962B2 (en) * 2001-12-06 2006-11-16 Tacron Industries Pty Ltd Improved Inspection Hatch

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1417377A (en) * 1920-06-07 1922-05-23 Morris Bonnevie Manhole frame and cover
BE789198A (fr) * 1971-09-23 1973-03-22 Pont A Mousson Regard de chaussee et analogues
US4203686A (en) * 1978-07-17 1980-05-20 Bowman Harold M Manhole construction
FR2508953A1 (fr) * 1981-07-06 1983-01-07 Pont A Mousson Regard de chaussee

Also Published As

Publication number Publication date
PT91830A (pt) 1990-03-30
DE68902529T2 (de) 1993-01-21
NO893844D0 (no) 1989-09-27
DK473689D0 (da) 1989-09-26
FR2636991A1 (fr) 1990-03-30
EP0362103A1 (fr) 1990-04-04
FR2636991B1 (fr) 1990-11-30
ES2032723T3 (es) 1993-04-01
PT91830B (pt) 1995-07-18
ES2032723T1 (es) 1993-03-01
ATE79658T1 (de) 1992-09-15
DK473689A (da) 1990-03-30
GR3005446T3 (enrdf_load_stackoverflow) 1993-05-24
DE68902529D1 (de) 1992-09-24
NO893844L (no) 1990-03-30

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