CA1203102A

CA1203102A - Safety for manhole cover

Info

Publication number: CA1203102A
Application number: CA000453588A
Authority: CA
Inventors: Maurice Lecuyer; Andre Lecuyer; Antonio Tavares
Original assignee: Lecuyer et fils Ltd
Current assignee: Lecuyer et fils Ltd
Priority date: 1984-05-04
Filing date: 1984-05-04
Publication date: 1986-04-15

Abstract

Ensemble de sécurité pour bouche d'accès comportant un anneau d'ajustement ayant un épaulement radial faisant saillie vers l'intérieur et à sa base et sur lequel vient reposer une grille de sécurité dont le pourtour externe a un diamètre lui permettant de coulisser librement au travers de l'anneau d'ajustement. Selon un autre aspect, l'épaulement est prévu à la base d'un cadre, support de tampon,et cette grille est pourvue de bras radiaux pouvant coulisser dans des rainures prévues sur la surface interne de l'anneau d'ajustement pour permettre à la grille de pouvoir être mise en place sur l'épaulement ou retirée en faisant coulisser les bras de la grille au travers des rainures de l'anneau d'ajustement.Safety assembly for an access mouth comprising an adjustment ring having a radial shoulder projecting inwards and at its base and on which rests a safety grid whose outer periphery has a diameter allowing it to slide freely at across the adjustment ring. According to another aspect, the shoulder is provided at the base of a frame, buffer support, and this grid is provided with radial arms which can slide in grooves provided on the internal surface of the adjustment ring to allow the grid can be placed on the shoulder or removed by sliding the arms of the grid through the grooves of the adjustment ring.

Description

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La presente invention concerne un ensemble de sécurite pour bouche d'accès.
Pour les besoins de la presente description, on appellera ci-apres ~<bouche d'accès tout regard d'egout, d'aqueduc et" generalement, tout puits per-mettant l'accès a des canalisations souterraines d'eau potable, d'eau d'egoutsdomestiques ou pluviale, ou encore des canalisations pour fils electriques ou de telécommunication de même que l'acces a une installation souterraine de pompage. La majorité de ces bouches d'accès, comme il est connu, sont construites maintenant d'un empilement de modules ou sections annulaires pre-fabriques en beton, monobloc, c'est-a-dire moulées en usine et formant un puits au sommet duquel se trouve 1~ un cadre recevant un couvercle ou tampon fermant la bouche d'acces et dont la surface supérieure est disposée au ras du pavé.
Or il arrive fréquemment que le tampon soit soulevé et même retiré completement de son siege sur le cadre-support dû a la vibration causée par le passage de véhicules, en particulier de camions lourds. L'entrée de la bouche d'acces s'en trouve conséquemment libérée et cela constitue évidemment un risque réel d'accident grave pour toute personne pouvant alors tomber dans la bouche d1acces. On a déja remédié ~ cette situation en disposant une grille de sécurité reposant librement sur un épaulement prévu a cet effet a la base de l'ouverture cylindrique du cadre-support de tampon. Cette grille peut ainsi être facilement retirée lorsque l'on doit entrer dans le puits et remise en place par la suite.
D'autre part, l'on fait de plus en plus usage d'anneaux d'ajustement que l'on place sur le cadre-support lorsque celui-ci s'est affaisse par la suite de tassement du sol supportant la bouche d'acces ou encore lorsque cela devient necessaire a la suite du resurfasage du pave.

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Ces anneaux d'ajustement sont fixés solidement au cadre-support à tampon et servent, comme il est connu, à
rehausser le siège sur lequel le tampon est dispose pour ramener la surface de ce tampon à nouveau au niveau du pave. L'on pose aussi parfois ces anneaux d'ajustement au moment même de la construction de la bouche d'acces en prevision d'un affaissement du pave lui-même autour de la bouche d'accès qui elle reste stable. Il s'agit alors de retirer simplement l'anneau d'ajustement et d'asseoir le tampon directement sur le cadre-support.
L'inconvenient de la situation actuelle c'est qu'il est necessaire pour l'usager de changer tous les cadres-supports existants en raison de ce que les anneaux d'ajustement presentement sur le marche nécessitent un nouveau cadre-support.
Enfin, il existe egalement des cadres-supports où il n'a pas ete prevu de monter une telle grille de securite ce qui expose la bouche d'accès aux dangers reels et graves mentionnes precede~ t lorsque le tam-pon est retire, volontairement ou par accident.
C~est donc le but principal de la presenteinvention de remedier à ces inconvenients en prevoyant des moyens permettant l'usage simultane d'un anneau d'ajustement et d'une grille de securite qui puisse être retiree, lorsque le tampon est ôte, sans qu'il soit pour cela necessaire d'enlever l'anneau d'ajustement.
Selon un premier aspect, l'invention reside essentiellement en un ensemble de securite pour bouche d'acces comportant: un anneau d'ajustement ayant une surface axiale interne, anneau pourvu interieurement et au sommet d'un logement destine a recevoir un tampon apte a fermer la bouche d'acces et d'un epaulement radial faisant saillie vers l'interieur à la base de la surface interne precitee, et comportant en outre une grille de securite ayant un pourtour de forme geometrique en ,~

permettent le coulissement libre au travers de l'anneau, cette grille reposant librement sur l'epaulement de l'anneau.
Selon un aspect particulier, cet ensemble comporte, en outre: un cadre annulaire a tampon à
surface axiale interne, cadre ayant a sa partie superieure un premier logement ouvert sur cette surface interne pour la réception, a l'origine, d'un tampon. Dans ce cas, l'anneau d'ajustement delimite, exterieurement et à sa base, un collet qui est reçu dans ce premier logement. Il delimite egalement, interieure-ment et au sommet, un deuxieme logement qui est destiné
a recevoir un tampon apte à fermer la bouche d'accès.
L'anneau a un prolongement a sa base qui est inséré
librement a l'intérieur du cadre, l'épaulement précité
supportant la grille étant alors prévu a l'extrémité de ce prolongement.
Selon un autre aspect, l'invention réside essentiellement en un ensemble de sécurité, pour bouche d'accès, comprenant: un cadre annulaire à tampon à
surface axiale interne, cadre ayant a sa partie supérieure un premier logement ouvert sur sa surface interne pour la réception, à l'origine, d'un tampon et ayant un epaulement radial faisant saillie interne à la base de cette même surface interne;
un anneau d'ajustement; cet anneau ayant une surface axiale ~nterne et formant, extérieurement et à sa base, un collet reçu dans le premier logement précité; cet anneau ayant, intérieure-ment et au so~met, un deuxième logement destiné àrecevoir un tampon apte à fermer ladite bouche d'accès;
cet anneau ayant en outre des rainures verticales tout autour de sa surface cylindrique interne, ces rainures étant ininterrompues a partir du deuxieme logement et ouvrant au-dessus de l'épaulement precité; une grille ~ .

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de securite disposee sur cet epaulement, cette grille ayant un pourtour de forme geometrique dont les dimen-sions en permettent le coulissement libre au travers de l'anneau d'ajustement et ayant des bras s'etendant radialement du pourtour en nombre et distribution autour du pourtour egaux au nombre et disposition des rainures, ces bras ayant une longueur et une largeur determinees pour pouvoir passer librement au travers des rainures et prendre appui sur l'epaulement precite du cadre, permettant ainsi la mise en place et le retrait de la grille de securite sans qu'il soit necessaire de retirer l'anneau d'ajuste-ment~
Enfin, selon un autre aspect additionnel, l'in-vention reside essentiellement en un ensemble de securite pour bouche d'accès comportant: un anneau d'ajustement ayant une surface axiale interne et, interieurement et au sommet, un logement destine à
recevoir un tampon apte à fermer ladite bouche d'accès;
cet anneau ayant en outre des rainures internes verticale-ment ininterrompues à partir dudit logement à tampon;chacune de ces rainures comportant une portion inferieure de largeur predeterminee et une portion superieure, trans-versale à ladite portion inferieure, ayant une largeur plus grande que celle de la portion inferieure, cette portion superieure ouvrant sur ledit logement à tampon et lesdites rainures ayant ainsi la forme generale d'un T; une grille de securite ayant un pourtour de forme geometrique dont les dimensions en permettent le coulissement libre au travers de l'anneau d'ajustement et ayant des bras s'eten-dant radialement du pourtour en nombre et dispositionautour dudit pourtour egaux au nombre et à la disposition desdites rainures, chaque bras ayant au moins une partie verticale de largeur et profondeur determinees permettant son logement dans la partie inferieure d'une desdites rainures.

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Selon ce dernier aspect, chacun desAits bras a preferablement la forme gen~rale d'un T ~"~l~nt une tige for-mant ladite partie verticale et une barre transversale dont les dimensions en permettent le logement dans la portion superieure transversale d'une desdites rainures, lesdits bras permettant ainsi la suspension libre de la grille de securite a l'interieur de l'anneau d'ajustement.
L'invention sera par ailleurs mieux comprise à la lecture de la description qui suit de realisations parti-culieres, description se référant au dessin annexé dans lequel:
la figure 1 est une vue en coupe axiale d'un ensemble selon une premiere realisation preférée;
la figure 2 est une vue en perspective de l'an-neau d'ajustement de la figure 1 alors que la figure 3 est une vue en coupe selon un plan passant par la ligne A-A' de la figure 2;
la figure 4 est une vue en coupe axiale d'une seconde réalisation;
la figure 5 est une vue en perspective de l'anneau d'ajustement illustre à la figure 4 alors que les figures 6 et 7 sont des vues en coupe selon des plans passant respectivement par les lignes A-A' et B-B' de la figure 5;
la figure 8 est une vue en perspective de la grille de securité utilisée dans la réalisation illus-trée dans les figures 4 à 7;
la figure 9 est une vue en perspective d'une variante de l'anneau d'ajustement de la figure 57 la figure 10 est une vue en perspective d'une grille de securite specialement adaptee pour usage avec l'anneau d'ajustement de la figure 9; et les figures 11 et 12 sont des details de la figure 10, en variantes.

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Les figures 1, 2 et 3 illustrent un ensemble de securite selon les données de l'invention qui com-porte un anneau d'ajustement 1 ayant une surface axiale cylindrique interne verticale 3 et un épaulement radial 5 qui fait saillie vers l'intérieur de l'anneau 1, a la base de la surface interne 3. Une grille de sécurite 7 repose sur l'épaulement 5. Cette grille a un pourtour circulaire 9 dont le diamètre est légèrement inférieur a celui de la surface interne 3 de sorte que la grille 7 puisse être couIissée sans difficulté au travers de l'anneau d'ajustement 1. Comme on pourra le constater, même si le tampon ou couvercle 11 est enlevé, volontaire-ment ou accidentellement, `la grille de sécurité 7 elimine ainsi tout risque d'accident et doit etre retir~ee avant de donner acces a l'intérieur du puits sur lequel l'ensemble précité est monté.
Tel qu'illustré, l'anneau d'ajustement 1 est monte sur un cadre-support de tampon 13 de forme conventionnelle. Ce dernier a une surface axiale cylindrique interne verticale 15 et comporte, à sa partie supérieure, un premier logement 17, ouvert sur la surface interne 15 et servant à la réception, à
l'origine, d'un tampon. L'anneau d'ajustement forme, extérieurement et a sa base, un collet 19 qui vient prendre position dans le logement 17. Un second logement 21 est également prévu au sommet et a l'inte-rieur de l'anneau 1. La përipherie du tampon 11 vient prendre place dans ce deuxieme logement 21 pour fermer l'ouverture de la bouche d'acces. Enfin, l'anneau 1 se prolonge vers le bas en 23, a partir du collet 19.
Tel qu'illustre, l'epaulement radial 5 est situe a la base de ce prolongement 23 dont le diamètre externe est inferieur au diametre de la surface interne 15 du cadre a tampon 13. De cette façon, l'anneau d'ajustement 1 peut être coulisse facilement a l'interieur du cadre 13.

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Il est maintenu solidement en place, soit au moyen de vis d'arrêt 27 vissees dans des trous taraudes 25 prevus au travers du prolongement 23, les vis 27 s'ap-puyant fermement sur la surface interne 15 du cadre 13, soit au moyen de caoul:chouc butyl. La grille de securite comporte une bande genéralement circuIaire 29 qui délimite le pourtour 9 et est pourvue d'un croisillon interne, non illustré à la figure 1 mais dont les rayons sont soli-daires de la bande 29, la grille 7 étant essentiellement 10: plate.
Dans la realisation des figures 4 à 8, 1'anneau 1' a surface interne 3 a egalement un collet 19 dont la base repose sur une surface horizontale du premier logement 17 du cadre 13'. L'anneau 1' a egalement un deuxieme logement 21 ou`prend place le tampon 11. Le collet 19 se prolonge egalement vers le bas mais en une serie de pattes 31 dont la surface exterieure a un diametre inferieur au diametre de la surface 15 du cadre de sorte que ces pattes 31 puissent s'inserer aisement dans le cadre 13'. L'e-paulement radial 33 se trouve cependant a la base de la surface 15 du cadre 13' et non a la base des prolongements 31 comme ce fut le cas pour la realisation de la figure 1.
L'anneau 7', figure 8, est forme d'une bande circulaire 29' dont le pourtour externe 9' a un diametre légerement inferieur a celui de la surface interne 3 de l'anneau 1'. Pour pouvoir cependant asseoir la grille 7' sur l'epaulement 33, il faut prevoir une serie de rainures verticales 35 tout autour de la surface interne 3 de l'anneau d'ajustement 1l. Ces rainures sont ininterrompues a partir du deuxieme logement 21 et debouchent au-dessus de l'epaulement 33 du cadre 13'.
La grille de securite 7' possede des bras radiaux 37 formes a même la bande circulaire 29l. Le nombre et la disposition autour de la bande 29' de ces bras 37 sont les mêmes que ceux des rainures 35O De meme, la ~2~3~æ

longueur et la largeur en sont légerement inferieures à la profondeur et la largeur des rainures 35. De cette façon, on comprendra facilement que l'on puisse sans difficulte inserer et retirer la grille 7' à l'in-terieur du cadre 13' sans retirer celui-ci mais simple-ment en faisant couIisser les bras 37 le long des rai~-nures 35. Ces dernières debouchent sur l'epaulement 33 de sorte que les bras 37 viennent s'appuyer immediatement sur l'epaulement 33 lorsque l'anneau 7' est insére, comme illustré à la figure 4.
L'anneau d'ajustement 1' est fixé au support 13' de la même façon que dans la realisation des figures 1 a 3, c'est-à-dire soit au moyen de vis d'arrêt 27 vissees dans des trous taraudes 25 des pattes 31, soit au moyen de caoutchouc butyl.
La grille de securite 7' comporte, interieure-ment à la bande 29', un croisillon 39 à quatre rayons solidaires entre eux et solidaires de ia bande 29'. On comprendra facilement que le nombre de ces rayons puisse egalement etre superieur à quatre.
~ Dans l'anneau d'ajustement 1" illustre à la Figure 9, qui est une variante de l'anneau 1' de la Figure 5, les rainures 35' comportent une portion infe-rieure de largeur predeterminee ainsi qu'une portion superieure qui est transversale à la portion inferieure et qui a une largeur plus granae que celle de la portion infexieure, cette portion superieure ouvrant sur le logement à tampon 21. Les rainures 35' ont donc la forme generale d'un T. Autrement, cet anneau d'ajustement 1"
est en tout point semblable à celui de la Figure 5 sauf qu'on ~v illustre des encoches 41 qui peuvent être utiles pour permettre l'ecoulement d'eau qui autrement pourrait s'accumuler sous le couvercle 11 ~voir Figure 1).
La Figure 10 illustre une grille de securite 7" qui est particulièrement destinee à etre utilisee avec l'anneau d'ajustement 1" de la Figure 9. La grille 7"

est assez semblable à celle de la Figure B sauf que chaque bras 37' a e~ mPnt la forme générale d'un T ayant une partie verticale de largeur et profondeur déterminée permettant son logement dans la portion inférieure d'une des rainures 35`. Chaque bras 37' a donc aussi une barre transversale dont les dimensions en permettent le logement dans la portion transversale supérieure d'une des rainures 35'. Ainsi, il est possible au moyen de ces bras 37' de suspendre la grille 7" librement à l'in-térieur de l'anneau d'ajustement 1" et de ~e~ retirer aisement.
On comprendra egalement aisement que l'anneau d'ajustement 1" peut être utilisé avec une grille de sécurité 7J, selon la Figure 8, dans le cas ou le cadre-support possede déjà un épaulement 33, comme l'illustre l'ensemble de sécurité selon la Figure 4. L'anneau d'ajustement 1" permet donc un double usage.
Dans les exemples de réalisations precitées, on verra facilement que l'on a prévu, selon l'invention, ~ 3 ~

The present invention relates to a set of security for access mouth.
For the purposes of this description, we will call hereafter ~ <access mouth all eyes sewer, aqueduct and "generally any well per-providing access to underground water pipes potable, domestic or storm water, or still pipes for electrical wires or telecommunications as well as access to an installation pumping underground. The majority of these mouths access, as it is known, are being built now a stack of pre-annular modules or sections concrete factories, monobloc, that is to say molded in the factory and forming a well at the top of which is 1 ~ a frame receiving a cover or pad closing the mouth of access and whose upper surface is arranged at flush with the pavement.
However it often happens that the tampon is lifted and even removed completely from its seat on the support frame due to the vibration caused by the passage vehicles, especially heavy trucks. Entrance consequently the access mouth is freed and this obviously constitutes a real risk of accident serious for anyone who could then fall into mouth of access. We have already remedied this situation by having a security grid freely resting on a shoulder provided for this purpose at the base of the opening cylindrical of the buffer support frame. This grid can thus be easily removed when enter the well and replace it afterwards.
On the other hand, more and more use is made of rings adjustment that is placed on the support frame when this subsided as a result of soil compaction supporting the mouth of access or when this becomes necessary after resurfacing the paver.

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These adjustment rings are securely attached to the frame-pad holder and serve, as is known, for raise the seat on which the pad is placed to bring the surface of this buffer back to the level of the pave. We also sometimes put these adjustment rings at the time of construction of the access mouth in anticipation of a sagging of the pave itself around of the access mouth which remains stable. It's about then simply remove the adjustment ring and to place the tampon directly on the support frame.
The downside of the current situation is that it is necessary for the user to change all existing support frames due to what the rings currently on the market require a new support frame.
Finally, there are also support frames where it was not planned to mount such a grid security which exposes the access mouth to the dangers real and serious mentioned above ~ t when the tam-pon is withdrawn, voluntarily or by accident.
It is therefore the main purpose of the presenteinvention to remedy these drawbacks by providing means allowing the simultaneous use of a ring adjustment and a security grid that can be removed, when the tampon is removed, without being it is necessary to remove the adjustment ring.
According to a first aspect, the invention resides basically as a safety set for mouth of access comprising: an adjustment ring having a internal axial surface, ring provided internally and at the top of a housing intended to receive a tampon able to close the access mouth and a radial shoulder protruding inward at the base of the surface internal aforementioned, and further comprising a grid of security having a geometrical outline in , ~

allow free sliding through the ring, this grid resting freely on the shoulder of the ring.
According to a particular aspect, this set further comprises: an annular buffer frame internal axial surface, frame having at its upper part a first open housing on this internal surface for reception, originally, of a tampon. In this case, the adjustment ring delimits, externally and at its base, a collar which is received in this first accommodation. It also delimits, interior-ment and at the top, a second housing which is intended to receive a tampon capable of closing the access mouth.
The ring has an extension at its base which is inserted freely inside the frame, the aforementioned shoulder supporting the grid then being provided at the end of this extension.
According to another aspect, the invention resides essentially in a safety package, for mouth access, comprising: an annular buffer frame internal axial surface, frame having at its upper part a first open housing on its internal surface for reception, originally, of a pad and having a radial shoulder making internal projection at the base of this same internal surface;
an adjustment ring; this ring having a surface axial ~ internal and forming, externally and at its base, a collar received in the first accommodation mentioned above; this ring having, interior-ment and so ~ met, a second housing intended to receive a pad capable of closing said access mouth;
this ring also having vertical grooves while around its internal cylindrical surface, these grooves being uninterrupted from the second accommodation and opening above the aforementioned shoulder; a grid ~.

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of safety arranged on this shoulder, this grid having a geometrical periphery whose dimensions allow it to slide freely through the adjustment ring and having arms extending radially around the perimeter and distribution around the perimeter equal to the number and arrangement of the grooves, these arms having a determined length and width for ability to pass freely through grooves and take support on the aforementioned shoulder of the frame, thus allowing the installation and removal of the security grid without the need to remove the adjustment ring ment ~
Finally, according to another additional aspect, the information vention essentially resides in a security package for access opening comprising: an adjustment ring having an internal axial surface and, internally and at the top, a housing intended for receiving a tampon capable of closing said access mouth;
this ring also having internal vertical grooves-uninterrupted from said buffer housing; each of these grooves having a lower portion of predetermined width and an upper portion, trans-versal to said lower portion, having a width more larger than that of the lower portion, this portion upper opening on said buffer housing and said grooves thus having the general shape of a T; a grid of security having a geometrical outline of which the dimensions allow it to slide freely at across the adjustment ring and having arms extending radially around the perimeter in number and arrangement around said perimeter equal to the number and arrangement said grooves, each arm having at least a portion vertical of determined width and depth allowing its housing in the lower part of one of said grooves.

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According to this last aspect, each of the said arms has preferably the general shape of a T ~ "~ l ~ nt a rod for-mant said vertical part and a crossbar whose dimensions allow it to be housed in the transverse upper portion of one of said grooves, said arms thus allowing the free suspension of the security grid inside the adjustment ring.
The invention will moreover be better understood on reading of the following description of partial achievements culieres, description referring to the attached drawing in which:
Figure 1 is an axial sectional view of a together according to a preferred first embodiment;
Figure 2 is a perspective view of the year-adjustment level of figure 1 while figure 3 is a sectional view along a plane passing through the line AA 'in Figure 2;
Figure 4 is an axial sectional view of a second realization;
Figure 5 is a perspective view of the adjustment ring illustrated in Figure 4 while Figures 6 and 7 are sectional views along planes passing respectively by lines AA 'and BB 'of Figure 5;
Figure 8 is a perspective view of the security grid used in the illus-shown in Figures 4 to 7;
Figure 9 is a perspective view of a variant of the adjustment ring of figure 57 Figure 10 is a perspective view of a security grille specially adapted for use with the adjustment ring of Figure 9; and Figures 11 and 12 are details of the Figure 10, in variants.

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Figures 1, 2 and 3 illustrate an assembly according to the data of the invention which comprises carries an adjustment ring 1 having an axial surface vertical internal cylindrical 3 and a radial shoulder 5 which projects towards the inside of the ring 1, at the base of the internal surface 3. A security grid 7 rests on shoulder 5. This grid has a circumference circular 9 whose diameter is slightly smaller has that of the internal surface 3 so that the grid 7 can be easily cut through the adjustment ring 1. As we can see, even if the buffer or cover 11 is removed, voluntary-or accidentally, at security grid 7 thus eliminates any risk of accident and must be removed ~ ee before giving access to the interior of the well on which the aforementioned assembly is mounted.
As shown, the adjustment ring 1 is mounts on a buffer support frame 13 of form conventional. The latter has an axial surface vertical internal cylindrical 15 and comprises, at its upper part, a first housing 17, open onto the internal surface 15 and used for reception, originally, a stamp. The adjustment ring forms, externally and at its base, a collar 19 which comes take a stand in housing 17. A second housing 21 is also provided at the top and inside laughter of ring 1. The periphery of buffer 11 comes take place in this second housing 21 to close opening the access mouth. Finally, ring 1 extends downward at 23, from the collar 19.
As illustrated, the radial shoulder 5 is located at the base of this extension 23 whose external diameter is smaller than the diameter of the internal surface 15 of the frame has buffer 13. In this way, the adjustment ring 1 can be slid easily inside the frame 13.

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It is held securely in place, i.e.
stop screw means 27 screwed into tapped holes 25 provided through the extension 23, the screws 27 are firmly on the internal surface 15 of the frame 13, either by caoul: butyl choux. The security grid has a generally circular band 29 which delimits the periphery 9 and is provided with an internal cross, not illustrated in figure 1 but whose radii are solid strip 29, grid 7 being essentially 10: flat.
In the embodiment of FIGS. 4 to 8, the ring The internal surface 3 also has a collar 19, the base rests on a horizontal surface of the first housing 17 of frame 13 '. Ring 1 'also has a second housing 21 where the pad 11 takes place. The collar 19 is also extends downwards but in a series of legs 31 whose outer surface has a diameter less than diameter of the surface 15 of the frame so that these legs 31 can easily be inserted into the frame 13 '. The-however, the radial 33 is at the base of the surface 15 of the frame 13 'and not at the base of the extensions 31 as it was the case for the realization of figure 1.
The ring 7 ', figure 8, is in the form of a band circular 29 'whose outer periphery 9' has a diameter slightly lower than that of the internal surface 3 of the ring 1 '. To be able to sit the grid, however 7 'on shoulder 33, a series of vertical grooves 35 all around the inner surface 3 of the adjustment ring 1l. These grooves are uninterrupted from the second housing 21 and open above the shoulder 33 of the frame 13 '.
The security grid 7 ′ has radial arms 37 forms even has the circular band 29l. The number and arrangement around the strip 29 ′ of these arms 37 are the same as those of the grooves 35O Similarly, the ~ 2 ~ 3 ~ æ

length and width are slightly less to the depth and width of the grooves 35. From this way, we will easily understand that we can easily insert and remove the 7 'grid inside frame 13 'without removing it but simple-lying by making the arms 37 go along the rai ~ -nures 35. These lead to shoulder 33 so that the arms 37 come to bear immediately on the shoulder 33 when the ring 7 'is inserted, as shown in figure 4.
The adjustment ring 1 'is fixed to the support 13 'in the same way as in the realization of Figures 1 to 3, i.e. either by means of stop screws 27 screwed into tap holes 25 of legs 31, i.e.
using butyl rubber.
The security grid 7 'includes, interieure-at the strip 29 ', a cross-piece 39 with four spokes integral with each other and integral with the band 29 ′. We will easily understand that the number of these rays can also be greater than four.
~ In the 1 "adjustment ring shown on the Figure 9, which is a variant of the ring 1 'of the Figure 5, the grooves 35 'have a lower portion predetermined width and a portion upper which is transverse to the lower portion and which has a wider width than that of the portion lower, this upper portion opening onto the buffer housing 21. The grooves 35 ′ therefore have the form general of a T. Otherwise, this 1 "adjustment ring is similar in all respects to that of Figure 5 except that ~ v illustrates notches 41 which may be useful to allow the flow of water which otherwise could accumulate under the cover 11 ~ see Figure 1).
Figure 10 illustrates a security grid 7 "which is particularly intended to be used with the adjustment ring 1 "in Figure 9. The grid 7"

is quite similar to that in Figure B except that each arm 37 ′ ae ~ mPnt the general shape of a T having a vertical part of determined width and depth allowing its accommodation in the lower portion of a 35` grooves. Each arm 37 'therefore also has a crossbar whose dimensions allow it housing in the upper transverse portion of a grooves 35 '. So it is possible by means of these arms 37 'to hang the grid 7 "freely inside the 1 "adjustment ring and remove ~ e ~
easily.
It will also be easily understood that the ring adjustment 1 "can be used with a grid security 7J, according to Figure 8, in the case where the frame-support already has a shoulder 33, as illustrated the safety assembly according to Figure 4. The ring 1 "adjustment allows dual use.
In the examples of the aforementioned embodiments, we can easily see that we have provided, according to the invention,

2~ la possibilité dans tous les cas d'insérer et de retirer la grille de sécurité, lorsque l'on désire descendre dans le puits, sans qu'il soit nécessaire de retirer l'anneau d'ajustement 1, 1', 1" , lequel est evidemment noyé dans l'asphalte du pavé qui l'entoure.
Il va de soi que la grille de sécurité peut être de forme autre que circulaire, polygonale par exemple. 2 ~ the possibility in all cases to insert and remove the security grid, when you wish to descend into the well, without the need to remove the ring adjustment 1, 1 ', 1 ", which is obviously embedded in the paved asphalt that surrounds it.
It goes without saying that the security grid can have a shape other than circular, polygonal by example.

Claims

The embodiments of the invention, concerning the-which an exclusive property or privilege is claimed, are defined as follows:
i. Security kit for access port, comprising: an adjustment ring having a surface internal axial, ring provided internally and at the top a housing intended to receive a pad capable of closing said access mouth and a radial shoulder making inward projection at the base of the inner surface mentioned above, and further comprising a security grid having a perimeter whose shape allows it to slide free through the ring and its support on the shoulder-ment of the ring.

2. Security assembly according to claim 1, further comprising means for fixing of the ring on an annular buffer frame.

3. Safety assembly according to the claims 1 or 2, in which the perimeter of the grid is formed by a band inside which is a crosspiece whose rays are integral with the strip, this grid being essentially flat.

4. Safety assembly according to the claim tion 1, further comprising: an annular buffer frame with internal axial surface, frame having at its upper part first housing open towards this surface internal for the reception, originally, of a buffer;
assembly in which the adjustment ring forms, outside laughingly and at its base, a collar received in the first housing and, internally and at the top, a second housing intended to receive a tampon capable of closing the access mouth, the ring having an extension at its base freely inserted inside the frame and the shoulder supporting the grid being provided at the end of this extension.

5. Safety assembly according to the claim tion 4, in which the extension is circular.

6. The assembly of claim 4, including carrying, in addition, means for fixing of the ring on the annular buffer frame.

7. Security assembly according to claim 6, in which the fixing means are screws tightening passing through the extension and taking press firmly on the internal surface of the frame annular buffer.

8. Safety assembly according to claims tions 4, 5 or 6, in which the perimeter of the grid is formed by a band inside which is a crosspiece whose rays are integral with the strip, this grid being essential-flat.

9. Safety assembly, for access port, comprising: an annular surface buffer frame internal axial, frame having at its upper part a first housing open on its internal surface for the reception, originally, of a pad and having a protruding radial shoulder internal to the base of this same internal surface; a adjustment ring; this ring having a surface internal and forming axial, externally and at its base, a collar received in the first accommodation mentioned above; this ring having, interior-and at the top, a second housing intended for receiving a tampon capable of closing said access mouth;
this ring also having vertical grooves while around its internal surface, these grooves being uninterrupted from the second dwelling and opening above the aforementioned shoulder; a grid safety device placed on this shoulder, this grid having a perimeter whose shape allows free sliding through the adjustment ring ment and having arms extending radially from the perimeter in number and distribution around the perimeter equal to the number and arrangement of the grooves, these arms having a determined length and width for ability to pass freely through grooves and bear on the aforementioned shoulder of the frame, thus putting in place and removing the security grille without the need to remove the adjustment ring.

10. Safety assembly according to the claim tion 9, further comprising means for fixing the frame adjustment ring.

11. Safety assembly according to the claim tion 10, in which the aforementioned fixing means include: legs extending axially vertically from the base of the ring towards the shoulder-lying and stopping above it, these legs being disposed between the grooves and having a surface internal extending in the plane of the internal surface of the ring, and clamping means comprising screw passing through said legs and bearing forcefully on the inner surface of the frame.

12. Safety assembly according to claims tions 9, 10 or 11, in which the perimeter of the grid is delimited by a generally circular strip, the grid having moreover an internal spider whose radii are integral with the circular band, this grid being essentially flat.

13. Security kit for access mouth comprising; an adjustment ring having a surface internal axial and internally and at the top, a housing intended to receive a tampon able to close said access mouth; this ring having in in addition to vertically uninterrupted internal grooves from said buffer housing; each of these grooves having a lower portion of predetermined width and an upper portion, transverse to said portion lower, having a width greater than that of the lower portion, this upper portion opening onto said buffer housing and said grooves thus having the general shape of a T; a security grid with a circular circumference whose diameter allows the slide-free through the adjustment ring and having arms extending radially outwardly from the periphery in number and arrangement around said periphery equal to number and arrangement of said grooves, each arm having at least a vertical part of width and pro-determined founder allowing its displacement in the lower part of one of said grooves.

14. Security assembly according to claim 13, in which each of said arms has the general shape of a T comprising a rod forming said vertical part wedge and a crossbar whose dimensions in allow accommodation in the upper trans-one of said grooves, said arms allowing thus the free suspension of the security grid at inside said adjustment ring.

15. Security assembly according to claim 14, further comprising: an annular buffer frame with internal axial surface, frame having at its upper part a ring housing open adjustment to said inner surface of the frame annular; assembly in which said adjustment ring forms, externally and at its base, a collar received in said adjustment ring housing.

16. Safety assembly according to the claim tion 15, further comprising means for fixing the frame adjustment ring.

17. Safety assembly according to the claim tion 16, wherein said fixing means comprises take: legs extending axially vertically from the base of the ring, these legs being arranged between the grooves having an internal surface extending in the plane of the inner surface of the ring, and the means clamp comprising screws passing through said legs and resting forcefully on the inner surface of the frame.

18. Safety assembly according to claims 15, 16 or 17, in which the perimeter of the grid is delimited by a generally circular band, the grid further having an internal spider whose rays are integral with the circular band, this grid being essentially flat.

19. A safety assembly as claimed cation 2, wherein said means for fixing the ring are located under said radial shoulder.