EP0506591B1 - Cover for an access or evacuation manhole - Google Patents
Cover for an access or evacuation manhole Download PDFInfo
- Publication number
- EP0506591B1 EP0506591B1 EP92470012A EP92470012A EP0506591B1 EP 0506591 B1 EP0506591 B1 EP 0506591B1 EP 92470012 A EP92470012 A EP 92470012A EP 92470012 A EP92470012 A EP 92470012A EP 0506591 B1 EP0506591 B1 EP 0506591B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grid
- frame
- bars
- holding
- sloping
- 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
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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
- E02D29/1463—Hinged connection of cover to frame
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- 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
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
- E05C19/06—Other devices specially designed for securing wings, e.g. with suction cups in which the securing part if formed or carried by a spring and moves only by distortion of the spring, e.g. snaps
- E05C19/063—Released by pull or pressure on the wing
Definitions
- the present invention relates to a device for crowning an access or exhaust chimney consisting of a removable tilting grid resting, when the device is in the closed position, in a frame sealed in the ground.
- EP-A-0085306 thus discloses a grid pivotally mounted in its support frame and the locking of which, in the closed position, is obtained by means of a median bar whose end located at the opposite of the articulation axis comes, by elastic deformation, to snap under a stop of the frame.
- EP-A-0280872 also discloses a grid articulated on its frame and at least one bar of which is provided, at its end opposite the articulation axis, with elastic fingers which, in the closed position of the grid, are housed under a projection of the frame.
- a grid articulated on its frame and at least one bar of which is provided, at its end opposite the articulation axis, with elastic fingers which, in the closed position of the grid, are housed under a projection of the frame.
- the grid is divided along its pivot axis into a middle part and two lateral parts connected elastically to the middle part, one end of the middle part adjoining the pivot axis being intended to bear against a corresponding surface of the frame by exerting a torque opposing the movement of the grid around its pivot axis.
- the invention aims to further improve the technique described above by creating a crowning device in which on the one hand any accidental opening of the grid and on the other hand the untimely closing of the latter when it is in position open are avoided and this thanks to an elastic action of certain elements of the grid.
- a device for crowning an access or evacuation chimney comprising a frame and a removable grid articulated along an axis XX of the frame, consisting of a series of bars connected two by two, by at least a spacer and extending perpendicular to the axis of articulation XX of the grid, characterized in that the grid further comprises at least one intermediate bar connected to the other bars of the grid by its end opposite the axis of hinge XX and the free end of which cooperates by elastic bending of the intermediate bar in the plane of the grid with means projecting upwards to keep the grid in the open and closed position, provided on the frame, these means comprising chamfered and inclined surfaces which cooperate with inclined surfaces provided on said intermediate bar.
- the crowning device comprises a frame 1 intended to be sealed in the ground, for example in a pavement, at the upper end of an evacuation or access chimney (not shown) and of a removable articulated grid 2 forming a cover .
- the frame 1 has in plan a generally square or rertangular shape and has a vertical skirt 3, provided at its periphery with a peripheral support sole 4 serving to seal the frame and an inner flange 5 serving as a support surface for grid 2.
- Two opposite sides 6, 7 of the skirt 3 each have in the immediate vicinity of a side 8 which is perpendicular to them, a cavity 9 of axis X-X parallel to the side 8, the two cavities 9 being coaxial.
- the skirt 3 is terminated by a side 10 opposite and parallel to the side 8.
- Each cavity 9 is formed in the skirt 3 of the frame 1 above the inner collar 5 approximately halfway between this collar and the top of the skirt 3.
- the part of the collar 5 secured to the side 8 of the skirt 3 has, near its ends, two openings 11A, 11B defining between them an intermediate portion 12 each of whose two ends, parallel to the sides 6 and 7 of the skirt, has a chamfered surface 13 directed towards the inside of the frame and moving away from the opposite wall of the corresponding opening 11A, 11B.
- Each stop 14 has in section the shape of a rectangular trapezoid. It is parallel to the sides 6 and 7 of the frame and consequently to the bars of the grid 2, and has on its side opposite the corresponding opening 11A, 11B, an inclined surface or ramp 15 ending in a horizontal apex 16.
- the grid 2 of generally rectangular shape, is constituted by a series of parallel bars, each bar being connected to the neighboring bars by at least one spacer.
- the grid comprises two external bars 17 each having near one of their ends, a pivot 18 intended to be housed in one of the cavities 9 of the frame 1, both pivots 18 being coaxial, of axis YY.
- Two intermediate bars 19A, 19B which are connected by their ends opposite to the axis YY of articulation of the grid, on the one hand to the external bars 17 and on the other hand to bars 20 of a central part of the grid , by single spacers 21A, 21B, each have at its free end close to the axis YY, a vertical projection 22 directed downwards, the most inner longitudinal face, that is to say the one closest to the middle of grid 2 has an inclined surface or ramp 23, the inclination of this ramp being identical to that of the corresponding ramp 15 of the associated stop 14.
- the connecting bars 20 constituting the central part of the grid complete the constitution thereof.
- the grid 2 is pinched at the free ends of the bars 17, this operation being made possible by the natural elasticity of the material constituting the grid 2 which is made for example in spheroidal graphite cast iron.
- the pivots 18 are thus placed opposite the cavities 9 of the frame 1 into which they penetrate when the clamping force is released.
- the spacing of the bars 19A, 19B takes place in the plane of the grid 2.
- the presence of a projection 22 located at a distance from the axis XX greater than its radius makes it necessary to provide in the flange 5 the openings 11A and 11B which avoid blocking of rotation by contact between the projections 22 and the flange 5 of the frame 1.
- the lifting movement of the grid 2 causes the inclined surfaces 23 to slide on the ramps 15 of the stops 14 and therefore, a lateral elastic spacing of the bars 19A, 19B relative to their rest position.
- a bar forming a lever is generally used.
- the intermediate bars which by elastic deformation in the plane of the grid, ensure the immobilization of the grid both in the open position and in the closed position , cooperating on the one hand with the ramps 15 of the stops 14 carried by the flange 5 and on the other hand, with the chamfered surfaces 13 of the intermediate part 12 of the flange, have projections 22 directed downwards which require provide in the collar 5 openings 11A, 11B for the passage of these projections during the rotation of the grid.
- intermediate bars do not have a projection, but have ends of cylindrical or spherical shape, identical to those of other bars such as bars 17 and 20 of the grid.
- FIG. 6 Such a variant is partially shown in Fig. 6.
- the frame 1 has stops 31 which extend over the entire width of the flange 5 parallel to the bars of the grid.
- Each of these stops 31 comprises a lateral ramp 32 intended to cooperate with an additional ramp 33 provided on each bar 29B in order to ensure its elastic spacing in the plane of the grid during the rotational movement of the latter and a chamfer end 34 allowing, by cooperation with the corresponding bar 29B, to let the said bar return to the rest position when the grid is in the open position in order to ensure that it is blocked against any untimely closing movement.
- the grid of the crowning device comprises two intermediate bars ensuring, in cooperation with means provided on the frame, the maintenance of the grid in the open and closed position.
- the grid has only one intermediate bar, preferably arranged in the central part of the grid and cooperating with corresponding holding means provided on the frame.
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- 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)
- Mechanical Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Sewage (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
- Fire-Detection Mechanisms (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Golf Clubs (AREA)
- Emergency Lowering Means (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Sink And Installation For Waste Water (AREA)
Abstract
Description
La présente invention est relative à un dispositif de couronnement d'une cheminée d'accès ou d'évacuation constitué d'une grille amovible basculante reposant, lorsque le dispositif est en position fermée, dans un cadre scellé dans le sol.The present invention relates to a device for crowning an access or exhaust chimney consisting of a removable tilting grid resting, when the device is in the closed position, in a frame sealed in the ground.
On connaît ainsi, par le document EP-A-0085306, une grille montée de manière pivotante dans son cadre support et dont le verrouillage, en position de fermeture, est obtenu par l'intermédiaire d'un barreau médian dont l'extrémité située à l'opposé de l'axe d'articulation vient, par déformation élastique, s'encliqueter sous une butée du cadre.EP-A-0085306 thus discloses a grid pivotally mounted in its support frame and the locking of which, in the closed position, is obtained by means of a median bar whose end located at the opposite of the articulation axis comes, by elastic deformation, to snap under a stop of the frame.
Un tel dispositif de couronnement présente cependant l'inconvénient de ne pas assurer le maintien de la grille en position d'ouverture.However, such a crowning device has the drawback of not ensuring that the grid is kept in the open position.
On connaît également, par le document EP-A-0280872, une grille articulée sur son cadre et dont un barreau au moins est muni, à son extrémité opposée a l'axe d'articulation, de doigts élastiques qui, en position de fermeture de la grille, viennent se loger sous une saillie du cadre. Là encore, si un tel dispositif permet effectivement de verrouiller la grille en position de fermeture, il ne permet cependant pas d'empêcher la fermeture intempestive de celle-ci lorsqu'elle se trouve en position ouverte.EP-A-0280872 also discloses a grid articulated on its frame and at least one bar of which is provided, at its end opposite the articulation axis, with elastic fingers which, in the closed position of the grid, are housed under a projection of the frame. Here again, if such a device does indeed make it possible to lock the grid in the closed position, it does not however prevent inadvertent closing of the latter when it is in the open position.
D'autre part, on a décrit dans la demande de brevet français n° 89 12 938 (FR-A-2652606) déposée le 29 septembre 1989 par la Demanderesse, un procédé et un dispositif de couronnement d une cheminée d'évacuation constituée d'une grille articulée dans un cadre selon un axe de pivotement de la grille correspondant à un côté de celle-ci, cette grille étant munie de barreaux reliés les uns aux autres par des entretoises.On the other hand, there has been described in French patent application No. 89 12 938 (FR-A-2652606) filed on September 29, 1989 by the Applicant, a method and a device for crowning an evacuation chimney consisting of 'a grid articulated in a frame along a pivot axis of the grid corresponding to one side thereof, this grid being provided with bars connected to each other by spacers.
La grille est divisée selon son axe de pivotement en une partie médiane et deux parties latérales reliées élastiquement à la partie médiane, une extrémité de la partie médiane jouxtant l'axe de pivotement étant destinée à venir en appui contre une surface correspondante du cadre en exerçant un couple s'opposant au mouvement de la grille autour de son axe de pivotement.The grid is divided along its pivot axis into a middle part and two lateral parts connected elastically to the middle part, one end of the middle part adjoining the pivot axis being intended to bear against a corresponding surface of the frame by exerting a torque opposing the movement of the grid around its pivot axis.
Un agencement du type décrit au brevet précité permet d'assurer que la grille reste bloquée pour éviter une ouverture accidentelle de la cheminée et également pour empêcher des actes de vandalisme au cours desquels la grille peut être volontairement ôtée de son cadre.An arrangement of the type described in the aforementioned patent makes it possible to ensure that the grid remains blocked to avoid accidental opening of the chimney and also to prevent acts of vandalism during which the grid can be voluntarily removed from its frame.
Par ailleurs, il assure le maintien de la grille en position d'ouverture.Furthermore, it maintains the grid in the open position.
L'invention vise à améliorer encore la technique décrite ci-dessus en créant un dispositif de couronnement dans lequel d'une part toute ouverture accidentelle de la grille et d'autre part la fermeture intempestive de celle-ci lorsqu'elle se trouve en position ouverte soient évitées et ceci grâce à une action élastique de certains éléments de la grille.The invention aims to further improve the technique described above by creating a crowning device in which on the one hand any accidental opening of the grid and on the other hand the untimely closing of the latter when it is in position open are avoided and this thanks to an elastic action of certain elements of the grid.
Elle a donc pour objet un dispositif de couronnement d'une cheminée d'accès ou d'évacuation comprenant un cadre et une grille amovible articulée selon un axe X-X du cadre, constituée d'une série de barreaux reliés deux à deux, par au moins une entretoise et s'étendant perpendiculairement à l'axe d'articulation X-X de la grille, caractérisé en ce que la grille comporte en outre au moins un barreau intermédiaire relié aux autres barreaux de la grille par son extrémité opposée à l'axe d'articulation X-X et dont l'extrémité libre coopére par flexion élastique du barreau intermédiaire dans le plan de la grille avec des moyens en saillie vers le haut de maintien de la grille en position d'ouverture et de fermeture, ménagés sur le cadre, ces moyens comprenant des surfaces chanfreinées et inclinées qui coopèrent avec des surfaces inclinées menagées sur ledit barreau intermédiaire.It therefore relates to a device for crowning an access or evacuation chimney comprising a frame and a removable grid articulated along an axis XX of the frame, consisting of a series of bars connected two by two, by at least a spacer and extending perpendicular to the axis of articulation XX of the grid, characterized in that the grid further comprises at least one intermediate bar connected to the other bars of the grid by its end opposite the axis of hinge XX and the free end of which cooperates by elastic bending of the intermediate bar in the plane of the grid with means projecting upwards to keep the grid in the open and closed position, provided on the frame, these means comprising chamfered and inclined surfaces which cooperate with inclined surfaces provided on said intermediate bar.
L'invention sera mieux comprise à l'aide de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels :
- la Fig.1 est une vue en plan d'un dispositif de couronnement de cheminée suivant l'invention;
- la Fig.2 est une coupe suivant la ligne 2-2 de la Fig.1;
- la Fig.3 est une vue de côté du dispositif de couronnement montrant la grille en position ouverte et en position fermée;
- la Fig.4 est une vue en plan de la grille du dispositif de couronnement suivant l'invention;
- la Fig.5 est une vue partielle en perspective du dispositif de couronnement suivant l'invention montrant les moyens de maintien de la grille en position ouverte ou fermée; et
- la Fig.6 est une vue partielle en perspective analogue à la Fig.5 montrant une variante des moyens de maintien de la grille.
- Fig.1 is a plan view of a chimney crowning device according to the invention;
- Fig.2 is a section along line 2-2 of Fig.1;
- Fig.3 is a side view of the crowning device showing the grid in the open position and in the closed position;
- Fig.4 is a plan view of the grid of the crowning device according to the invention;
- Fig.5 is a partial perspective view of the crowning device according to the invention showing the means for holding the grid in the open or closed position; and
- Fig.6 is a partial perspective view similar to Fig.5 showing a variant of the grid holding means.
En se référant tout d'abord aux Fig.1 et 2, on voit que le dispositif de couronnement suivant l'invention comporte un cadre 1 destiné à être scellé dans le sol, par exemple dans un revêtement de chaussée, à l'extrémité supérieure d'une cheminée d'évacuation ou d'accès (non représentée) et d'une grille amovible articulée 2 formant couvercle.Referring first to Fig. 1 and 2, we see that the crowning device according to the invention comprises a
Le cadre 1 a en plan une forme générale carrée ou rertangulaire et présente une jupe verticale 3, munie à sa périphérie d'une semelle d'appui périphérique 4 servant au scellement du cadre et d'une collerette intérieure 5 servant de surface d'appui pour la grille 2.The
Deux côtés opposés 6,7 de la jupe 3 présentent chacun à proximité immédiate d'un côté 8 qui leur est perpendiculaire, une cavité 9 d'axe X-X parallèle au côté 8, les deux cavités 9 étant coaxiales.Two
La jupe 3 est terminée par un côté 10 opposé et parallèle au côté 8.The
Chaque cavité 9 est ménagée dans la jupe 3 du cadre 1 au-dessus de la collerette intérieure 5 à peu près à mi-hauteur entre cette collerette et le haut de la jupe 3.Each
La partie de la collerette 5 solidaire du côté 8 de la jupe 3 présente à proximité de ses extrémités, deux ouvertures 11A, 11B définissant entre elles une portion intermédiaire 12 dont chacune des deux extrémités, parallèles aux côtés 6 et 7 de la jupe, présente une surface chanfreinée 13 dirigée vers l'intérieur du cadre et s'écartant de la paroi opposée de l'ouverture 11A, 11B correspondante.The part of the
Chaque extrémité de la portion intermédiaire 12 de la collerette délimitée par les ouvertures 11A,11B, supporte en outre une butée 14 en saillie vers le haut du cadre 1 et solidaire du côté 8 de la jupe 3.Each end of the
L'agencement de la surface chanfreinée 13 et de la butée 14, apparaît clairement sur la vue en perspective de la Fig.5.The arrangement of the
Chaque butée 14 présente en coupe la forme d'un trapéze rectangle. Elle est parallèle aux côtés 6 et 7 du cadre et par conséquent aux barreaux de la grille 2, et présente sur son côté en regard de l'ouverture 11A, 11B correspondante, une surface inclinée ou rampe 15 se terminant par un sommet horizontal 16.Each
La grille 2, de forme générale rectangulaire, est constituée par une série de barreaux parallèles, chaque barreau étant relié aux barreaux voisins par au moins une entretoise.The
Ainsi qu'on le voit clairement à la Fig.4, la grille comporte deux barreaux extérieurs 17 présentant chacun à proximité d'une de leurs extrémités, un pivot 18 destiné à venir se loger dans une des cavités 9 du cadre 1, les deux pivots 18 étant coaxiaux, d'axe Y-Y.As can be clearly seen in FIG. 4, the grid comprises two
Deux barreaux intermédiaires 19A, 19B qui sont reliés par leurs extrémités opposées à l'axe Y-Y d'articulation de la grille, d'une part aux barreaux extérieurs 17 et d'autre part à des barreaux 20 d'une partie centrale de la grille, par des entretoises uniques 21A, 21B, comportent chacun à son extrémité libre proche de l'axe Y-Y, une saillie verticale 22 dirigée vers le bas, dont la face longitudinale la plus intérieure, c'est à dire la plus proche du milieu de la grille 2, présente une surface inclinée ou rampe 23, l'inclinaison de cette rampe étant identique à celle de la rampe 15 correspondant de la butée 14 associée. Les barreaux de liaison 20 constituant la partie centrale de la grille, achèvent la constitution de celle-ci.Two
Pour monter la grille 2 dans son cadre 1, cette dernière étant présentée perpendiculairement au plan du cadre, on effectue un pincement de la grille au niveau des extrémités libres des barreaux 17, cette opération étant rendue possible par l'élasticité naturelle du matériau constituant la grille 2 qui est réalisée par exemple en fonte à graphite sphéroïdal. Les pivots 18 sont ainsi placés en regard des cavités 9 du cadre 1 dans lesquelles ils pénètrent lors du relâchement de l'effort de pincement.To mount the
En partant de la position d'ouverture de la grille représentée en trait mixte à la Fig.3, pour fermer la grille 2, on fait pivoter celle-ci autour de son axe X-X de rotation dans le sens de la flèche F et ce, jusqu'à amener les rampes 23 des barreaux intermédiaires 19A, 19B en contact avec les surfaces chanfreinées 13 de la portion intermédiaire 12 de la collerette 5.Starting from the open position of the grid shown in phantom in Fig.3, to close the
Lorsque les rampes 23 entrent en contact avec les surfaces chanfreinées 13, il se crée entre la collerette 5 et les barreaux 19A, 19B, un couple s'opposant à la poursuite de la rotation de la grille 2 empêchant ainsi sa fermeture intempestive.When the
Pour surmonter ce couple, on applique à la grille 2, une force dirigée vers le bas dont l'intensité provoque le glissement des rampes 23 le long des surfaces chanfreinées 13 de la partie intermédiaire 12 de la collerette 5. Ce mouvement de glissement provoque l'écartement élastique des barreaux 19A, 19B par rapport à leur position normale, comme représenté en trait mixte à la Fig.1, de sorte que la saillie 22 de chacun des barreaux 19A, 19B, peut pivoter autour de l'axe X-X grâce à la présence des ouvertures respectives 11A, 11B ménagées dans la collerette 5 du cadre 1 qui laissent passer les saillies 22 correspondantes.To overcome this torque, a downward force is applied to the
L'écartement des barreaux 19A, 19B se fait dans le plan de la grille 2.The spacing of the
Lorque la grille atteint la position fermée, les rampes inclinées 23 prévues sur les saillies 22 des barreaux 19A, 19B viennent, du fait du rapprochement élastique des barreaux intermédiaires 19A, 19B, en contact avec les rampes inclinées 15 des butées 14 portées par les extrémités de la portion intermédiaire 12 de la collerette 5 et créent ainsi un couple qui s'oppose à l'ouverture accidentelle de la grille 2.When the grid reaches the closed position, the
On remarquera que les extrémités des barreaux 17, 20 de la grille, autres que les barreaux intermédiaires 19A et 19B, qui se situent à proximité de l'axe X-X de rotation de la grille, ne font pas obstacles à la rotation de celle-ci en raison du fait que leur surface d'extrémité jouxtant l'axe X-X présente une forme cylindrique ou sphérique centrée sur l'axe X-X, et ayant un rayon tel que lors de la rotation de la grille, ces extrémités ne viennent jamais en contact ni avec la jupe 3, ni avec la collerette 5 du cadre 1.It will be noted that the ends of the
En ce qui concerne les barreaux intermédiaires 19A, 19B, la présence d'une saillie 22 située à une distance de l'axe X-X supérieure à son rayon, rend nécessaire de prévoir dans la collerette 5 les ouvertures 11A et 11B qui évitent le blocage de la rotation par contact entre les saillies 22 et la collerette 5 du cadre 1.As regards the
Pour ouvrir la grille 2, il faut lui appliquer une force de soulèvement d'une intensité telle que le couple qu'elle engendre soit supérieur au couple résistant qui résulte du contact entre les rampes 23 des saillies 22 des barreaux intermédiaires 19A et 19B et des rampes 15 des butées 14 solidaires du cadre 1.To open the
Le mouvement de soulèvement de la grille 2 provoque le glissement des surfaces inclinées 23 sur les rampes 15 des butées 14 et de ce fait, un écartement élastique latéral des barreaux 19A, 19B par rapport à leur position de repos.The lifting movement of the
Pour assurer ce déplacement, on utilise en général une barre formant levier.To ensure this movement, a bar forming a lever is generally used.
L'écartement par déformation élastique des barreaux intermédiaires 19A et 19B, est assuré dans le plan de la grille 2. Ensuite, lors de la poursuite de la rotation de la grille 2, les barreaux 19A et 19B voient leurs saillies respectives 22 s'engager dans les ouvertures respectives 11A et 11B de la collerette 5 en autorisant ainsi la poursuite de la rotation de la grille 2 autour de l'axe X-X.The spacing by elastic deformation of the
Lorsque la grille est amenée dans sa position d'ouverture, les saillies 22 en venant au contact des surfaces chanfreinées 13 de la partie intermédiaire 12, permettent à nouveau le rapprochement des barreaux 19A, 19B par rappel élastique, dans leur position de repos, de sorte que la grille est à nouveau bloquée à l'encontre de tout mouvement de fermeture intempestif.When the grid is brought into its open position, the
La position des butées 14 du cadre 1 entre les barreaux intermédiaires 19A, 19B et les orientations respectives des rampes 15 des butées 14 et 23 des saillies 22, font en sorte que la flexion élastique des barreaux s'accompagne d'un mouvement d'écartement de ces barreaux.The position of the
On peut également envisager de disposer les butées solidaires du cadre 1 à l'extérieur des barreaux intermédiaires et d'orienter les rampes de ces butées et celles des extrémités des barreaux intermédiaires de manière que lors de la rotation de la grille, la flexion élastique des barreaux dans le plan de la grille s'accompagne d'un mouvement de rapprochement des barreaux.One can also consider placing the stops integral with the
Dans le mode de réalisation décrit en référence aux Fig.1 à 5, les barreaux intermédiaires, qui par déformation élastique dans le plan de la grille, assurent l'immobilisation de la grille tant en position d'ouverture, qu'en position de fermeture, en coopérant d'une part avec les rampes 15 des butées 14 portées par la collerette 5 et d'autre part, avec les surfaces chanfreinées 13 de la partie intermédiaire 12 de la collerette, présentent des saillies 22 dirigées vers le bas qui nécessitent de prévoir dans la collerette 5 des ouvertures 11A, 11B pour le passage de ces saillies lors de la rotation de la grille.In the embodiment described with reference to Figs 1 to 5, the intermediate bars, which by elastic deformation in the plane of the grid, ensure the immobilization of the grid both in the open position and in the closed position , cooperating on the one hand with the
On peut également imaginer une réalisation dans laquelle les barreaux intermédiaires, ne présentent pas de saillie, mais comportent des extrémités de forme cylindrique ou sphérique, identiques à celles des autres barreaux tels que les barreaux 17 et 20 de la grille.One can also imagine an embodiment in which the intermediate bars do not have a projection, but have ends of cylindrical or spherical shape, identical to those of other bars such as
Une telle variante est représentée partiellement à la Fig.6. On voit sur cette figure, l'un des barreaux intermédiaires 29B dont l'extrémité 30 est de forme cylindrique, de rayon R tel que lorsque la grille à laquelle appartient le barreau 29B est montée dans le cadre 1,l'axe de la surface cylindrique 30 soit confondu avec l'axe X-X de rotation de la grille.Such a variant is partially shown in Fig. 6. We see in this figure, one of the intermediate bars 29B whose
Dans ces conditions, lors du déplacement de la grille en rotation, la surface de l'extrémité du barreau 29B ne viendra jamais en contact ni avec la jupe 3, ni avec la collerette 5 du cadre 1.Under these conditions, during the movement of the rotating grid, the surface of the end of the bar 29B will never come into contact with either the
Dans ce mode de réalistion, il n'est donc pas utile de ménager d'ouvertures pour laisser passer une partie quelconque de l'extrémité du barreau 29B lors de son déplacement en rotation.In this embodiment, it is therefore not useful to provide openings to allow any part of the end of the bar 29B to pass during its rotational movement.
Pour assurer le blocage de la grille en position d'ouverture et en position de fermeture, le cadre 1 porte des butées 31 qui s'étendent sur toute la largeur de la collerette 5 parallèlement aux barreaux de la grille. Chacune de ces butées 31 comporte une rampe latérale 32 destinée à coopérer avec une rampe complémentaire 33 prévue sur chaque barreau 29B afin d'en assurer l'écartement élastique dans le plan de la grille lors du déplacement en rotation de celle-ci et un chanfrein d'extrémité 34 permettant par la coopération avec le barreau 29B correspondant, de laisser revenir ledit barreau en position de repos lorsque la grille est en position d'ouverture afin d'assurer le blocage de celle-ci à l'encontre de tout mouvement de fermeture intempestif.To block the grid in the open position and in the closed position, the
Dans les exemples qui viennent d'être décrits en référence aux dessins, la grille du dispositif de couronnement comporte deux barreaux intermédiaires assurant en coopération avec des moyens ménagés sur le cadre, le maintien de la grille en position d'ouverture et de fermeture.In the examples which have just been described with reference to the drawings, the grid of the crowning device comprises two intermediate bars ensuring, in cooperation with means provided on the frame, the maintenance of the grid in the open and closed position.
On comprendra qu'il est également possible que la grille ne comporte qu'un seul barreau intermédiaire disposé de préférence dans la partie centrale de la grille et coopérant avec des moyens de maintien correspondants prévus sur le cadre.It will be understood that it is also possible that the grid has only one intermediate bar, preferably arranged in the central part of the grid and cooperating with corresponding holding means provided on the frame.
Claims (8)
- Cover means for an access or drainage shaft comprising a frame (1) and a removable grid (2) hinged along an axis X-X on the frame, comprising a set of bars joined in pairs by at least one strut and extending perpendicularly to the hinge axis X-X of the grid (2), characterised in that the grid (2) also comprises at least one intermediate bar (19A, 19B; 29B) connected to the other bars of the grid by its end opposite the hinge axis X-X and whose free end acts together with upwardly projecting means (13, 14, 15; 31, 32, 34) holding the grid (2) in the open and closed positions, provided on the frame (1), through elastic bending of the intermediate bar (19A, 19B; 29B) in the plane of the grid, these means comprising chamfered sloping surfaces (13, 34; 15, 32) which act together with sloping surfaces (23, 33) provided on the said intermediate bar.
- Cover means according to claim 1, characterised in that the grid comprises outer bars (17) which are provided with pivots (18) at the free ends thereof which engage through elastic bending of the outer bars (17) in corresponding cavities (9) in the frame (1), two intermediate bars (19A, 19B; 29B) each being connected to an outer bar (17) by a single strut (21A) and to a bar (20) of a central part of the grid through a single strut (21B).
- Cover means according to either of claims 1 and 2, characterised in that each of the intermediate bars (19A, 19B) of the grid (2) has at its free end adjacent to the hinge axis of the grid in the frame (1) a downwardly pointing vertical projection (22) whose inner longitudinal face has a sloping or ramp surface (23) which acts together with a sloping surface (15) of a stop (14) which projects towards the top of the frame (1), fixed thereto and extending parallel to the bars of the grid (2), the said stops (14) forming the means for holding the grid (2) in the closed position by acting together with the projections (22) on the intermediate bars.
- Cover means according to claim 3, in which the frame (1) is provided with an inner supporting collar (5) for the grid (2) in the closed position, characterised in that the openings (11A, 11B) for passage of the projections (22) from the intermediate bars (19A, 19B) when the grid rotates are fitted in the inner collar (5) of the frame (1).
- Cover means according to claim 4, characterised in that the means for holding the grid (2) in the open position comprise bevelled surfaces (13) sloping towards the interior of the frame (1), provided on one of the walls of the openings (11A, 11B) which bound an intermediate portion (12) of the collar (5) and standing away from the other walls respectively of the corresponding openings.
- Cover means according to claim 5, characterised in that the stops (14) acting together with the projections (22) are located along the walls of the openings (11A, 11B) incorporating the said bevelled surfaces (13).
- Cover means according to either of claims 1 and 2, characterised in that each of the intermediate bars (29B) of the grid (2) comprise a free end close to the hinge axis of the grid of the frame (1) in a manner appropriate to enable it to turn about the hinge axis without coming into contact with the frame (1) and in that stops (31) which are parallel to the bars of the grid, and are provided with sloping surfaces (32) acting together with corresponding sloping surfaces (33) of the intermediate bars (29B), forming the said means for holding the grid in the closed position, are provided on the frame (1).
- Cover means according to claim 7, characterised in that each of the stops (31) forming the said means holding the grid in the closed position comprises a bevelled terminal surface (34) sloping towards the interior of the frame, the bevelled surfaces (34) forming the said means for holding the grid in the open position together with the ends of the corresponding intermediate bars (29B).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9103800A FR2674560B1 (en) | 1991-03-28 | 1991-03-28 | CAPPING DEVICE FOR AN ACCESS OR EVACUATION CHIMNEY. |
FR9103800 | 1991-03-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0506591A1 EP0506591A1 (en) | 1992-09-30 |
EP0506591B1 true EP0506591B1 (en) | 1995-03-15 |
Family
ID=9411236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92470012A Expired - Lifetime EP0506591B1 (en) | 1991-03-28 | 1992-03-24 | Cover for an access or evacuation manhole |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0506591B1 (en) |
AT (1) | ATE119964T1 (en) |
DE (1) | DE69201664T2 (en) |
DK (1) | DK0506591T3 (en) |
ES (1) | ES2063725T3 (en) |
FR (1) | FR2674560B1 (en) |
GR (1) | GR3015427T3 (en) |
IE (1) | IE65916B1 (en) |
NO (1) | NO301602B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6722813B2 (en) * | 2000-07-06 | 2004-04-20 | Saint-Gobain Pam | Road network device with articulated cover |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU724047B2 (en) * | 1996-03-07 | 2000-09-07 | Ronald E. Graham (Holdings) Pty. Limited | A gully grate |
FR2814182B1 (en) * | 2000-09-21 | 2003-08-08 | Saint Gobain Pont A Mousson | ARTICULATED DEVICE FOR SHUTTERING A MANNER AND HINGE MEMBER FOR SUCH A DEVICE |
FR2843139B1 (en) * | 2002-08-02 | 2005-03-18 | Norinco | "GRID TO OBTAIN A CANIVEAU OR ANALOGUE" |
GB0220165D0 (en) | 2002-08-30 | 2002-10-09 | Saint Gobain Pipelines Plc | A drainage assembly |
WO2004085754A1 (en) * | 2003-03-25 | 2004-10-07 | Aco Severin Ahlmann Gmbh & Co. Kg | Cover arrangement |
ITPI20110047A1 (en) * | 2011-04-26 | 2012-10-27 | Ferb Figli Di Ezio Rossi Spa | AUTOMATIC VANDALISM COUPLING BETWEEN CHASSIS AND COVERING ELEMENT OR ROUND TRIM |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2119836A (en) * | 1982-01-29 | 1983-11-23 | Brickhouse Dudley Mfg | Manhole cover or grating and frame assemblies |
EP0280872B1 (en) * | 1987-02-02 | 1992-07-01 | Von Roll Ag | Device for securing a cover closing an opening |
-
1991
- 1991-03-28 FR FR9103800A patent/FR2674560B1/en not_active Expired - Lifetime
-
1992
- 1992-03-24 ES ES92470012T patent/ES2063725T3/en not_active Expired - Lifetime
- 1992-03-24 AT AT92470012T patent/ATE119964T1/en not_active IP Right Cessation
- 1992-03-24 DK DK92470012.3T patent/DK0506591T3/en active
- 1992-03-24 EP EP92470012A patent/EP0506591B1/en not_active Expired - Lifetime
- 1992-03-24 DE DE69201664T patent/DE69201664T2/en not_active Expired - Lifetime
- 1992-03-25 NO NO921167A patent/NO301602B1/en not_active IP Right Cessation
- 1992-03-27 IE IE921005A patent/IE65916B1/en not_active IP Right Cessation
-
1995
- 1995-03-16 GR GR940403940T patent/GR3015427T3/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6722813B2 (en) * | 2000-07-06 | 2004-04-20 | Saint-Gobain Pam | Road network device with articulated cover |
Also Published As
Publication number | Publication date |
---|---|
NO301602B1 (en) | 1997-11-17 |
ES2063725T1 (en) | 1995-01-16 |
NO921167L (en) | 1992-09-29 |
FR2674560B1 (en) | 1993-06-11 |
ES2063725T3 (en) | 1995-05-16 |
IE65916B1 (en) | 1995-11-29 |
ATE119964T1 (en) | 1995-04-15 |
EP0506591A1 (en) | 1992-09-30 |
DE69201664D1 (en) | 1995-04-20 |
IE921005A1 (en) | 1992-10-07 |
FR2674560A1 (en) | 1992-10-02 |
GR3015427T3 (en) | 1995-06-30 |
DE69201664T2 (en) | 1995-07-13 |
NO921167D0 (en) | 1992-03-25 |
DK0506591T3 (en) | 1995-08-07 |
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