EP0737782B1 - Bilaterally operable locking mechanism for a manhole cover - Google Patents

Bilaterally operable locking mechanism for a manhole cover Download PDF

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Publication number
EP0737782B1
EP0737782B1 EP96420119A EP96420119A EP0737782B1 EP 0737782 B1 EP0737782 B1 EP 0737782B1 EP 96420119 A EP96420119 A EP 96420119A EP 96420119 A EP96420119 A EP 96420119A EP 0737782 B1 EP0737782 B1 EP 0737782B1
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EP
European Patent Office
Prior art keywords
cover
lever
control lever
hinged
cutout
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
EP96420119A
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German (de)
French (fr)
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EP0737782A1 (en
Inventor
Robert Tremouilhac
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Norinco SA
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SODIF SA
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Publication date
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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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B63/00—Locks or fastenings with special structural characteristics
    • E05B63/0065—Operating modes; Transformable to different operating modes
    • E05B63/0069—Override systems, e.g. allowing opening from inside without the key, even when locked from outside
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C3/00—Fastening devices with bolts moving pivotally or rotatively
    • E05C3/12—Fastening devices with bolts moving pivotally or rotatively with latching action
    • E05C3/16—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch
    • E05C3/162—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch the handle or member moving essentially towards or away of the plane of the wing or frame

Definitions

  • the invention relates to the field of manholes which, composed of a fixed frame and at least one hinged flap, are arranged in the ground to allow access to a network underground, water, electricity, sanitation or other, or to technical galleries containing various networks, regularly visited by technicians.
  • the object of the present invention is to provide a releasable locking device on both sides of a manhole allowing to activate the shutter of this manhole as well from the outside than from the inside, while opposing the operation from the outside by a unauthorized person.
  • this device is more particularly interesting with an equipped shutter at least one gas spring assisting the raising and lowering of the flap, it can also be mounted on manholes that do not include assistance and can be lifted from the interior.
  • this gaze is composed of a frame 2 on which is articulated, around a joint 3, a flap 4 reinforced by ribs 5 and capable of obscuring totally the upper opening 6 of the frame.
  • the movements of the shutter 4 are assisted by at least one gas spring 7.
  • the shutter 4 is locked in the open position by a device generally designated by 8 combining with a gas spring 7 visible in FIG. 1, and which, for example, is identical to that described in French patent application No. 2,674,879.
  • the device according to the invention is essentially composed of a keeper 10, a bent lever 12, a control lever 13, a plate 14 and a shutter 15.
  • Keep 10 has the general shape of a hook and is fixed projecting from the face internal 2a of the frame 2 which is opposite the articulation zone of the flap 4.
  • the bent lever 12 is articulated near its elbow by a pin 16, projecting laterally on one side and pivotally mounted at the lower end of the plate 14.
  • the lever 12 comprises a substantially vertical branch 12a, the lower end of which is provided with a finger 17, projecting laterally and able to cooperate with the opening 10a of the keeper 10.
  • the horizontal branch 12b of the lever extends substantially horizontally and in the direction of inside the eyes. Near its free end, this branch 12b is hooked to the upper end of a drawing member and, for example, of a chain 18.
  • the plate 14 is constituted by a rib of the flap or by an added piece against the inside of this flap.
  • This plate has a transverse tab and horizontal 19 which, as best shown in Figure 3, avoids pivoting up the horizontal branch 12b under the action of a return spring 20, working in torsion, and included in the articulation between the plate 14 and the bent lever 12.
  • the control lever 13 is articulated on the plate 14 by a hinge pin 22 which is parallel to the articulation axis 16 of the bent lever 12 and which is arranged higher and inwardly relative to this axis 16.
  • the body of this lever is, at least in part, disposed in a cutout 25 of the shutter. Its free branch 13a ends in a handle 26 which is accessible through a widening 25a of the cutout 25. Close to its articulation 22, the lever 13 has a cam profile 27, capable of coming to bear between the branch 12b of the bent lever 12, as shown in Figure 4.
  • the stroke of the lever 13 is limited upwards by pressing its branch 13a against the corresponding edge 25b of the cutout 25, and, downwards, by pressing this lever against a trigger guard 28, disposed below the enlarged cutout 25a and forming part of the flap 4, or reported on him.
  • the articulation of the lever 13 on the plate 2 also includes a spring of torsional reminder 29, able to return this lever to the rest position, as shown in the figure 3.
  • the shutter 15 which ensures the unlocking of the control lever when in the rest position, consists of a metal plate which is housed completely in the enlargement 25a of the cutout 25, so as to hide the handle of grip 26 of the lever 13, as shown in FIG. 3.
  • the fixing of the shutter is provided by a screw 30 whose head rests on the shutter and whose rod passes through this shutter and is screwed into the trigger guard 28, and more precisely into a nut 32 secured to this trigger guard.
  • the head of the screw 30 has an axial recess 31, ( Figure 2) of non-cross section regular, requiring a special tool to ensure its rotation drive and the unscrewing the screw.
  • This locking device is simple, easily actuated, reliable in the time and allows, for a reduced cost, to unlock the shutter both from the outside and from inside, while opposing its activation by an unauthorized person.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • Lock And Its Accessories (AREA)
  • Window Of Vehicle (AREA)
  • Paper (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Clamps And Clips (AREA)

Abstract

The locking mechanism consists of a hook-shaped catch (10) on the inside of the manhole cover surrounding frame (2), designed to receive a peg (17) on one end of an inverted L-shaped arm pivoted to a bracket (14) on the underside of the cover (4). The arm is rotated to release the catch by a lever (13) with a cam-shaped end which is let into a recess in the cover or, from below, by a chain or cable (18) connected to the tip of the arm's upper horizontal section. When the manhole cover is closed, the control lever is fixed in place by a shutter (15) and a bolt (30) which screws into a nut (32) under a plate (28) in the cover recess. The cover can be equipped with a gas cylinder to facilitate lifting.

Description

L'invention concerne le domaine des regards qui, composés d'un cadre fixe et d'au moins un volet articulé, sont disposés dans le sol pour permettre l'accès à un réseau souterrain, d'eau, d'électricité, d'assainissement ou autres, ou à des galeries techniques contenant des réseaux divers, régulièrement visités par des techniciens.The invention relates to the field of manholes which, composed of a fixed frame and at least one hinged flap, are arranged in the ground to allow access to a network underground, water, electricity, sanitation or other, or to technical galleries containing various networks, regularly visited by technicians.

Il est déjà connu de doter les regards d'un dispositif de verrouillage s'opposant à leur ouverture par l'extérieur par toute personne ne disposant pas d'une clé appropriée. Toutefois, il est absolument impossible d'ouvrir ces regards par l'intérieur, c'est à dire à partir du puits d'accès au réseau ou à la galerie. Or, il s'avère qu'une telle possibilité d'ouverture serait intéressante, en particulier pour les galeries techniques s'étendant sur les grandes longueurs, afin de permettre au personnel d'entretien d'effectuer des vérifications sur des tronçons de longueur réduite, sans avoir à parcourir la totalité de la galerie pour accéder au tronçon à examiner. De même, dans les galeries techniques véhiculant des fluides, comme c'est le cas dans les zones portuaires ou aéroportuaires, le personnel d'entretien souhaiterait pouvoir disposer de davantage d'issues de secours pour pouvoir sortir d'une galerie, en cas de début d'incendie ou d'émanations toxiques diverses.It is already known to provide manholes with a locking device opposing opening them from the outside by anyone who does not have an appropriate key. However, it is absolutely impossible to open these looks from the inside, i.e. from from the access well to the network or to the gallery. However, it turns out that such a possibility of opening would be interesting, especially for technical galleries spanning large lengths, to allow maintenance personnel to carry out checks on reduced length sections, without having to cover the entire gallery to access the section to be examined. Likewise, in technical galleries conveying fluids, such as this is the case in port or airport areas, maintenance personnel would like be able to have more emergency exits to be able to leave a gallery, in the event the start of a fire or various toxic fumes.

La présente invention a pour but de fournir un dispositif de verrouillage libérable des deux côtés d'un regard permettant donc d'actionner le volet de ce regard aussi bien de l'extérieur que de l'intérieur, tout en s'opposant à la manoeuvre de l'extérieur par une personne non habilitée.The object of the present invention is to provide a releasable locking device on both sides of a manhole allowing to activate the shutter of this manhole as well from the outside than from the inside, while opposing the operation from the outside by a unauthorized person.

A cet effet, le dispositif selon l'invention comprend :

  • une gâche en forme de crochet, saillant de la face interne du cadre, à l'opposé de la zone d'articulation du volet sur le cadre,
  • un levier coudé qui, articulé près de son coude sur une platine verticale saillant au-dessous du volet, présente, d'une part, une branche sensiblement verticale dont l'extrémité libre porte latéralement un doigt, formant verrou et apte à coopérer avec la gâche en forme de crochet, et, d'autre part, une branche sensiblement horizontale dirigée vers l'intérieur du regard et dont l'extrémité libre est munie d'un moyen pour l'accrochage d'un organe de tirage,
  • et un levier de commande qui, articulé sur la platine autour d'un axe parallèle à celui d'articulation du levier coudé, comporte un corps avec une poignée extrême logés dans une découpe du volet, et, près de son articulation, un profil en came apte à venir en contact avec la branche horizontale du levier coudé pour le faire basculer dans le sens du déverrouillage, ce levier de commande étant associé à un moyen de surverrouillage extérieur.
To this end, the device according to the invention comprises:
  • a keeper in the form of a hook, projecting from the internal face of the frame, opposite the articulation zone of the flap on the frame,
  • a bent lever which, articulated near its elbow on a vertical plate projecting below the flap, has, on the one hand, a substantially vertical branch whose free end carries a finger laterally, forming a lock and able to cooperate with the keeper in the form of a hook, and, on the other hand, a substantially horizontal branch directed towards the inside of the manhole and the free end of which is provided with means for attaching a drawing member,
  • and a control lever which, articulated on the plate about an axis parallel to that of articulation of the bent lever, comprises a body with an extreme handle housed in a cutout of the flap, and, near its articulation, a profile in cam able to come into contact with the horizontal branch of the bent lever to tilt it in the unlocking direction, this control lever being associated with an external unlocking means.

Avec ce dispositif, pour ouvrir le regard à partir de l'intérieur du puits qu'il ferme, il suffit d'actionner l'organe de tirage en faisant basculer le levier coudé, pour déverrouiller le dispositif et permettre l'ouverture du volet. With this device, to open the gaze from the inside of the well that it closes, it is enough to actuate the pulling member by tilting the bent lever, to unlock the device and allow the shutter to open.

Pour ouvrir le volet de l'extérieur, il suffit, après avoir enlevé le moyen de surverrouillage, de saisir le levier de commande et de le faire pivoter, afin que son profil en came fasse basculer le levier coudé et provoque le déverrouillage.To open the shutter from the outside, after removing the means of lock, grasp the control lever and rotate it so that its profile cam tilts the bent lever and causes unlocking.

Bien que ce dispositif soit plus particulièrement intéressant avec un volet équipé d'au moins un ressort à gaz assistant le soulèvement et l'abaissement du volet, il peut aussi être monté sur des regards ne comportant pas d'assistance et pouvant être soulevés de l'intérieur.Although this device is more particularly interesting with an equipped shutter at least one gas spring assisting the raising and lowering of the flap, it can also be mounted on manholes that do not include assistance and can be lifted from the interior.

D'autres caractéristiques et avantages ressortiront de la description qui suit en référence au dessin schématique annexé représentant une forme d'exécution de ce dispositif dans le cas de son application à un regard de chaussée équipé de moyens assistant les mouvements de son volet.

  • Figure 1 est une vue en perspective en coupe partielle de l'ensemble du regard,
  • Figure 2 est une vue partielle en perspective éclatée, montrant les éléments essentiels du dispositif de verrouillage,
  • Figures 3 et 4 sont des vues partielles de côté en coupe montrant le dispositif, respectivement, lorsqu'il est en position de verrouillage et lorsqu'il est en position de déverrouillage par actionnement du levier de commande.
    • Other characteristics and advantages will emerge from the description which follows with reference to the appended schematic drawing representing an embodiment of this device in the case of its application to a manhole cover equipped with means assisting the movements of its shutter.
  • FIG. 1 is a perspective view in partial section of the entire manhole,
  • FIG. 2 is a partial exploded perspective view showing the essential elements of the locking device,
  • Figures 3 and 4 are partial side views in section showing the device, respectively, when it is in the locked position and when it is in the unlocked position by actuation of the control lever.

    • De façon connue, ce regard est composé d'un cadre 2 sur lequel est articulé, autour d'une articulation 3, un volet 4 renforcé par des nervures 5 et apte à occulter totalement l'ouverture supérieure 6 du cadre. Dans la forme d'exécution représentée, les mouvements du volet 4 sont assistés par au moins un ressort à gaz 7. De même, le volet 4 est verrouillé en position d'ouverture par un dispositif désigné de façon générale par 8 se combinant avec un ressort à gaz 7 visible figure 1, et qui, par exemple, est identique à celui décrit dans la demande de brevet français n° 2 674 879.In a known manner, this gaze is composed of a frame 2 on which is articulated, around a joint 3, a flap 4 reinforced by ribs 5 and capable of obscuring totally the upper opening 6 of the frame. In the embodiment shown, the movements of the shutter 4 are assisted by at least one gas spring 7. Similarly, the shutter 4 is locked in the open position by a device generally designated by 8 combining with a gas spring 7 visible in FIG. 1, and which, for example, is identical to that described in French patent application No. 2,674,879.

    Le dispositif selon l'invention est essentiellement composé d'une gâche 10, d'un levier coudé 12, d'un levier de commande 13, d'une platine 14 et d'un obturateur 15.The device according to the invention is essentially composed of a keeper 10, a bent lever 12, a control lever 13, a plate 14 and a shutter 15.

    La gâche 10 a la forme générale d'un crochet et est fixée en saillie de la face interne 2a du cadre 2 qui est opposé à la zone d'articulation du volet 4.Keep 10 has the general shape of a hook and is fixed projecting from the face internal 2a of the frame 2 which is opposite the articulation zone of the flap 4.

    Le levier coudé 12 est articulé près de son coude par un axe 16, saillant latéralement d'un côté et monté pivotant à l'extrémité inférieure de la platine 14. Le levier 12 comprend une branche sensiblement verticale 12a dont l'extrémité inférieure est munie d'un doigt 17, saillant latéralement et apte à coopérer avec l'ouverture 10a de la gâche 10. La branche horizontale 12b du levier s'étend sensiblement horizontalement et en direction de l'intérieur du regard. A proximité de son extrémité libre, cette branche 12b est accrochée à l'extrémité supérieure d'un organe de tirage et, par exemple, d'une chaínette 18.The bent lever 12 is articulated near its elbow by a pin 16, projecting laterally on one side and pivotally mounted at the lower end of the plate 14. The lever 12 comprises a substantially vertical branch 12a, the lower end of which is provided with a finger 17, projecting laterally and able to cooperate with the opening 10a of the keeper 10. The horizontal branch 12b of the lever extends substantially horizontally and in the direction of inside the eyes. Near its free end, this branch 12b is hooked to the upper end of a drawing member and, for example, of a chain 18.

    La platine 14 est constituée par une nervure du volet ou par une pièce rapportée contre la face intérieure de ce volet. Cette platine est munie d'une patte transversale et horizontale 19 qui, comme le montre mieux la figure 3, évite le pivotement vers le haut de la branche horizontale 12b sous l'action d'un ressort de rappel 20, travaillant en torsion, et inclus dans l'articulation entre la platine 14 et le levier coudé 12.The plate 14 is constituted by a rib of the flap or by an added piece against the inside of this flap. This plate has a transverse tab and horizontal 19 which, as best shown in Figure 3, avoids pivoting up the horizontal branch 12b under the action of a return spring 20, working in torsion, and included in the articulation between the plate 14 and the bent lever 12.

    Le levier de commande 13 est articulé sur la platine 14 par un axe d'articulation 22 qui est parallèle à l'axe d'articulation 16 du levier coudé 12 et qui est disposé plus haut et vers l'intérieur par rapport à cet axe 16. Le corps de ce levier est, au moins en partie, disposé dans une découpe 25 du volet. Sa branche libre 13a se termine par une poignée 26 qui est accessible à travers un élargissement 25a de la découpe 25. A proximité de son articulation 22, le levier 13 comporte un profil en came 27, apte à venir en appui entre la branche 12b du levier coudé 12, comme montré à la figure 4.The control lever 13 is articulated on the plate 14 by a hinge pin 22 which is parallel to the articulation axis 16 of the bent lever 12 and which is arranged higher and inwardly relative to this axis 16. The body of this lever is, at least in part, disposed in a cutout 25 of the shutter. Its free branch 13a ends in a handle 26 which is accessible through a widening 25a of the cutout 25. Close to its articulation 22, the lever 13 has a cam profile 27, capable of coming to bear between the branch 12b of the bent lever 12, as shown in Figure 4.

    La course du levier 13 est limitée vers le haut par appui de sa branche 13a contre le bord correspondant 25b de la découpe 25, et, vers le bas, par appui de ce levier contre un pontet 28, disposé au-dessous de la découpe élargie 25a et faisant partie du volet 4, ou rapporté sur lui.The stroke of the lever 13 is limited upwards by pressing its branch 13a against the corresponding edge 25b of the cutout 25, and, downwards, by pressing this lever against a trigger guard 28, disposed below the enlarged cutout 25a and forming part of the flap 4, or reported on him.

    L'articulation du levier 13 sur la platine 2 comporte également un ressort de rappel en torsion 29, apte à ramener ce levier en position de repos, comme représenté à la figure 3.The articulation of the lever 13 on the plate 2 also includes a spring of torsional reminder 29, able to return this lever to the rest position, as shown in the figure 3.

    Enfin, l'obturateur 15, qui assure le surverrouillage du levier de commande lorsqu'il est en position de repos, est constitué par une plaquette métallique se logeant totalement dans l'élargissement 25a de la découpe 25, de manière à masquer la poignée de préhension 26 du levier 13, comme montré à la figure 3. La fixation de l'obturateur est assurée par une vis 30 dont la tête prend appui sur l'obturateur et dont la tige traverse cet obturateur et se visse dans le pontet 28, et plus précisément dans un écrou 32 solidaire de ce pontet. La tête de la vis 30 comporte une empreinte axiale 31, (figure 2) de section non régulière, nécessitant un outil spécial pour assurer son entraínement en rotation et le dévissage de la vis.Finally, the shutter 15, which ensures the unlocking of the control lever when in the rest position, consists of a metal plate which is housed completely in the enlargement 25a of the cutout 25, so as to hide the handle of grip 26 of the lever 13, as shown in FIG. 3. The fixing of the shutter is provided by a screw 30 whose head rests on the shutter and whose rod passes through this shutter and is screwed into the trigger guard 28, and more precisely into a nut 32 secured to this trigger guard. The head of the screw 30 has an axial recess 31, (Figure 2) of non-cross section regular, requiring a special tool to ensure its rotation drive and the unscrewing the screw.

    Lorsque le regard, équipé de ce dispositif de verrouillage, est au repos, comme montré à la figure 3, il est possible de procéder à son déverrouillage, à partir de l'intérieur du puits au-dessus duquel il est disposé, en exerçant sur l'organe de tirage 18 une traction dans le sens de la flèche 33. Cette traction fait basculer le levier coudé 12 dans le sens de la flèche 34 et permet au doigt 17 d'échapper de la gâche 10a et, ainsi, de libérer le regard 2. Si le regard est muni d'une assistance par ressort à gaz 7, il se redresse automatiquement en position d'ouverture, représentée à la figure 1, et se verrouille dans cette position grâce au dispositif 8. S'il ne possède pas un tel dispositif d'assistance, l'opérateur doit procéder au soulèvement du volet.When the manhole, equipped with this locking device, is at rest, as shown in Figure 3, it is possible to unlock it from inside the well above which it is disposed, by pulling on the pulling member 18 in the direction of the arrow 33. This pulling switches the bent lever 12 in the direction of the arrow 34 and allows the finger 17 to escape from the keeper 10a and, thus, to free the gaze 2. If the manhole is equipped with gas spring assistance 7, it straightens automatically when open position, shown in Figure 1, and locks in this position with the device 8. If he does not have such an assistance device, the operator must carry out the shutter lift.

    On notera que cette opération peut être réalisée, bien que le dispositif de déverrouillage par l'extérieur, soit en position surverrouillée. It will be noted that this operation can be carried out, although the device for unlocking from the outside, either in the unlocked position.

    Pour déverrouiller par l'extérieur, il suffit, après avoir retiré l'obturateur 15, de faire pivoter le levier de commande 13 dans le sens de la flèche 35 de figure 4, afin d'amener le profil en came 27 contre la face supérieure de la branche horizontale 12b du levier 12, pour provoquer le basculement de ce levier dans le sens de la flèche 34. Dès que cette opération est effectuée et que le levier 13 est relâché, son ressort de rappel le ramène en position de repos, tandis que, simultanément le ressort de rappel du levier 12 le ramène dans sa position initiale.To unlock from the outside, it is sufficient, after removing the shutter 15, to rotate the control lever 13 in the direction of arrow 35 in FIG. 4, in order to bring the cam profile 27 against the upper face of the horizontal branch 12b of the lever 12, to cause this lever to tilt in the direction of arrow 34. As soon as this operation is carried out and the lever 13 is released, its return spring brings it back rest position, while simultaneously the return spring of the lever 12 brings it back into its initial position.

    Ce dispositif de verrouillage est simple, facilement actionnable, fiable dans le temps et permet, pour un coût réduit, de déverrouiller le volet aussi bien de l'extérieur que de l'intérieur, tout en s'opposant à son actionnement par une personne non habilitée.This locking device is simple, easily actuated, reliable in the time and allows, for a reduced cost, to unlock the shutter both from the outside and from inside, while opposing its activation by an unauthorized person.

    Claims (4)

    1. Locking device releasable from both sides of a manhole composed of a frame (2), at least one cover (4) hinged thereon and a latch actuable from outside and blocking the cover in the closed position, characterized in that it comprises:
      a hook-shaped keeper (10) projecting from the inner face of the frame (2) on the opposite side to the area in which the cover (4) is hinged on the frame (2),
      a bent lever (12) which is hinged close to its bend on a vertical plate (14) projecting below the cover and has, on the one hand, a substantially vertical branch (12a) whose free end carries laterally a finger (17), forming a latch and capable of cooperating with the hook-shaped keeper (10), and, on the other hand, a substantially horizontal branch (12b) which is directed towards the interior of the manhole and to the free end of which is attached a pulling member (18),
      and a control lever (13) which is hinged on the plate (14) about a pin (22) parallel to that (16) on which the bent lever (12) is hinged and includes a body with an end handle (26) which are accommodated in a cutout (25) of the cover, and, close to its hinge, a cam profile (27) capable of coming into contact with the horizontal branch (12b) of the bent lever (12) in order to tilt it in the unlocking direction, this control lever being associated with an outer top-locking means (15, 30).
    2. Device according to Claim 1, characterized in that the control lever (13) cooperates, in one direction, with a stop limiting its opening travel and formed by the corresponding edge (25b) of the cutout (25) made for it in the cover (4), and in the other direction, with a stop limiting its closing tilting and formed by a guard (28) arranged below the cutout (25) and integral with the cover (4).
    3. Device according to both of Claims 1 and 2, characterized in that the cutout (25) made in the cover (4) for the control lever (13) includes, in its area receiving the handle, a widening (25a) serving also as a housing for a removable obturator (15), fixed in position by a screw (30), whose head bears on it and whose shank passes through it and screws into the guard.
    4. Device according to any one of claims 1 to 3, characterized in that the bent lever (12) and the control lever (13) are each associated with a means (20, 29) for return to the locked position.
    EP96420119A 1995-04-14 1996-04-10 Bilaterally operable locking mechanism for a manhole cover Expired - Lifetime EP0737782B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9504857A FR2732988B1 (en) 1995-04-14 1995-04-14 RELEASABLE LOCKING DEVICE ON BOTH SIDES OF A LOOK
    FR9504857 1995-04-14

    Publications (2)

    Publication Number Publication Date
    EP0737782A1 EP0737782A1 (en) 1996-10-16
    EP0737782B1 true EP0737782B1 (en) 1999-07-21

    Family

    ID=9478375

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96420119A Expired - Lifetime EP0737782B1 (en) 1995-04-14 1996-04-10 Bilaterally operable locking mechanism for a manhole cover

    Country Status (5)

    Country Link
    EP (1) EP0737782B1 (en)
    AT (1) ATE182385T1 (en)
    DE (1) DE69603310T2 (en)
    ES (1) ES2136960T3 (en)
    FR (1) FR2732988B1 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    KR101300700B1 (en) * 2013-01-17 2013-08-26 대전광역시 시설관리공단 Break away for prevention of manhole cover
    EP4032833A1 (en) * 2021-01-20 2022-07-27 Villiger Entsorgungssysteme AG Safety device for a dump pit of an underfloor waste container

    Families Citing this family (14)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2758836B1 (en) * 1997-01-30 1999-03-05 Norinco DEVICE FOR LOCKING A BUFFER WITH ARTICULATED MOUNTING ON A FRAME
    CA2323482A1 (en) * 1998-03-09 1999-09-16 Stefan Koveal Latch
    FR2887268B1 (en) * 2005-06-15 2007-08-10 Norinco Sa DEVICE FOR CHECKING THE POSITION FOR LOCKING OR UNLOCKING A LATCH FOR BLOCKING A FRAME FOR A CLOSURE COVER OF THIS FRAMEWORK
    ES2301355B1 (en) * 2006-05-11 2009-03-16 Nad S.L. OPENING AND CLOSING DEVICE FOR MOTORCYCLE CASES.
    DE202008015182U1 (en) * 2008-11-13 2010-04-08 Paul Wolff Gmbh Automatic cover device
    GB201114349D0 (en) * 2011-08-19 2011-10-05 Underground Vision Uk Ltd Manhole cover support device
    SE538235C2 (en) * 2014-07-17 2016-04-12 Amphi Tech Ab Säkerhetsmanlucka
    GB2543642B (en) * 2015-09-17 2021-01-20 Neenah Foundry Company Manhole cover assembly
    GB2542506B (en) * 2015-09-17 2021-03-24 Neenah Foundry Company Manhole cover assembly
    US10233609B2 (en) 2017-04-19 2019-03-19 Neenah Foundry Company Floating manhole cover assembly
    CN107123437A (en) * 2017-05-04 2017-09-01 东莞市品宇电子科技有限公司 A kind of portable type is external and slot hard disc device
    US11414829B2 (en) 2019-10-07 2022-08-16 Neenah Foundry Company Hybrid manhole cover
    FR3104620B1 (en) * 2019-12-17 2022-03-18 B R Z Services fireproof floor hatch with improved mechanical strength
    GB2622368A (en) * 2022-09-13 2024-03-20 Cubis Systems Ltd A lift lock mechanism

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    Publication number Priority date Publication date Assignee Title
    GB793975A (en) * 1955-11-02 1958-04-23 Wilmot Breeden Ltd Refrigerator or like door fastenings
    FR2424372A1 (en) * 1978-04-24 1979-11-23 Dumortier Robert Lever latch securing circular manhole cover to frame - has lateral V=shape with apex axle top leg forming hand lever and lower leg including bolt hook
    JPS58178728A (en) * 1982-04-13 1983-10-19 Yoichi Hara Steel cover with locking mechanism
    US4960297A (en) * 1989-09-28 1990-10-02 Component Hardware Group, Inc. Double action latch

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    KR101300700B1 (en) * 2013-01-17 2013-08-26 대전광역시 시설관리공단 Break away for prevention of manhole cover
    EP4032833A1 (en) * 2021-01-20 2022-07-27 Villiger Entsorgungssysteme AG Safety device for a dump pit of an underfloor waste container

    Also Published As

    Publication number Publication date
    DE69603310T2 (en) 1999-11-11
    FR2732988B1 (en) 1997-06-13
    ATE182385T1 (en) 1999-08-15
    ES2136960T3 (en) 1999-12-01
    FR2732988A1 (en) 1996-10-18
    DE69603310D1 (en) 1999-08-26
    EP0737782A1 (en) 1996-10-16

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