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EP0176451B1 - Locking device for a manhole cover - Google Patents

Locking device for a manhole cover Download PDF

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Publication number
EP0176451B1
EP0176451B1 EP85420150A EP85420150A EP0176451B1 EP 0176451 B1 EP0176451 B1 EP 0176451B1 EP 85420150 A EP85420150 A EP 85420150A EP 85420150 A EP85420150 A EP 85420150A EP 0176451 B1 EP0176451 B1 EP 0176451B1
Authority
EP
European Patent Office
Prior art keywords
plug
cavity
washer
wall
intended
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
Application number
EP85420150A
Other languages
German (de)
French (fr)
Other versions
EP0176451A1 (en
Inventor
S.A. Fidum
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fidum Sa
Original Assignee
Fidum Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fidum Sa filed Critical Fidum Sa
Priority to AT85420150T priority Critical patent/ATE33159T1/en
Publication of EP0176451A1 publication Critical patent/EP0176451A1/en
Application granted granted Critical
Publication of EP0176451B1 publication Critical patent/EP0176451B1/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • E02D29/1427—Locking devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/1043—Swinging
    • Y10T292/1075—Operating means
    • Y10T292/1083—Rigid
    • Y10T292/1085—Friction catch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/50—Special application
    • Y10T70/5093—For closures
    • Y10T70/5155—Door
    • Y10T70/5199—Swinging door
    • Y10T70/5246—Dead bolts
    • Y10T70/5296—Single
    • Y10T70/5345—Swinging
    • Y10T70/5363—Key operable only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/80—Parts, attachments, accessories and adjuncts
    • Y10T70/8946—Emergency unlocking or release arrangements

Definitions

  • French patent 2,376,919 in the name of the applicant describes a locking device composed of a pivoting lock, housed in a cavity of the buffer and the upper part of which is provided with a housing which, capable of cooperating with an actuating member formed at the lower end of a removable key, is arranged angularly so as to coincide only in the closed position with the housing formed in the upper wall of the cavity and corresponding, in shape and dimensions, to those of the actuator.
  • the lock when the manhole is locked, the lock is still in the waiting position for the key and when it is open, the key is inseparable from the pad and therefore requires to be actuated, in the locking direction, to be released. , which prevents the pad from being closed and not locked.
  • the locking device must be able to be actuated from the inside, that is to say from the manhole;
  • the device described in the aforementioned French patent if it prohibits any actuation from the outside by means of keys other than those provided, and any closing without locking, is not designed to be actuated from the inside.
  • the object of the present invention is therefore to provide a buffer locking device which, while retaining a structure requiring locking in order to recover the key, eliminates the operating disadvantages inherent in manufacturing and allows actuation of the device by the inside.
  • the head of the bolt protrudes into the cavity and is integral in rotation with a bit capable of pivoting by describing a trajectory opening out of the buffer, while its rod, on the one hand, is guided in rotation by a lower, spaced wall an upper wall comprising the cavity and delimiting with the wall a space in which the bit is disposed, on the other hand, is linked in rotation to a notched washer, able to cooperate with positioning grooves formed in the lower face of the lower wall, moreover, constitutes a support for a spring bearing on the notched washer and on another washer wedged in translation at the end of this rod, and, finally, is provided at its lower end with a polygonal profile actuable by a key.
  • this device With this device, the actual locking is ensured by the bit whose angular positioning is indicated to the operator by the notched washer cooperating with the grooves of the lower wall. Due to its structure, this device is insensitive to dimensional variations and, in addition, can be operated from the outside, with an appropriate key, and from the inside.
  • FIG 1 denote two road buffers articulated around axes (1) relative to a fixed frame (3).
  • Each buffer of generally trapezoidal shape, has, opposite its articulation (1), protuberances (4) intended to penetrate into the interval delimited between the base (3) and the end of the other buffer.
  • the locking device is arranged, in this embodiment, in each of the protrusions. these (4).
  • each of the protrusions (4) is composed of an upper wall (40) and a lower wall (41) delimiting between them a space (42).
  • the upper wall (40) is crossed by a stepped circular bore (43), of large diameter, constituting the cavity, while the wall (42) is crossed by a bore (44), of small diameter and coaxial with the first.
  • the bore (43) comprises laterally, and diametrically opposite in this embodiment, two vertical grooves (45) opening into the space (42). These grooves (45) communicate with semicircular grooves (46) underlying a step (47).
  • the grooves (46) open into vertical blind grooves (48) upwards.
  • From the underside (49) of the wall (41) open grooves (50) arranged radially relative to the bore (44).
  • These positioning grooves are four in number and are aligned, two by two, on two perpendicular axes, one parallel to the longitudinal axis of the vertical grooves (48).
  • the lock generally designated by (7), is composed of a cylindrical head (51) provided at its lower part with a flat (52).
  • the head is provided with a longitudinal groove (53).
  • Its rod (51a) also cylindrical, is provided with two lateral flats (54), parallel to the flats (52), and ends with a polygonal end piece (55).
  • this nozzle has a square section.
  • the rod (51a) of the lock (7) is linked in rotation, by its flats (54), to a washer (58) which, as shown in more detail in FIG. 5, is provided with two projecting diametric notches (59) from its upper side.
  • This washer is also made of synthetic material with a low coefficient of friction. It is pressed against the lower face (49) of the lower wall (41), by a helical spring (60) bearing on a lower washer (61) stopped in translation by a transverse pin (62) passing through the rod.
  • This simple device can either be actuated by the head of the lock (7) or by the polygonal end piece (55), that is to say from the outside or from the inside of the manhole.
  • a drive member generally designated by (63) in FIG. 3, composed of a bush (64) whose outside diameter is equal, apart from play, to the diameter of the cavity (43) and whose diameter of the internal bore (65) is equal, apart from play, to the outside diameter of the head of the latch (7).
  • This bore (65) is provided with an internal longitudinal key (66) capable of cooperating and engaging in the groove (53) of the head (51) of the lock.
  • the sleeve (64) is provided with two radial pins (67) capable of penetrating into the vertical grooves (45) of the upper wall (40) to engage, under the step (47), in the circular grooves (46) and come, at the end of the opening movement, into the vertical blind grooves (48).
  • the drive member (63) in the opposite direction, that is to say by pushing it down to release its tenons (67) lights (48) before rotating it until its pins come at the level of the vertical lights (45), allowing its release from the buffer.
  • the actuation key can only be removed when the bit (56) is in the locked position.
  • FIG. 1 shows that the locking of the buffers, which normally takes place by engaging the bit in an appropriate housing of the base (3), can also be carried out by engaging the bit in a housing formed on the opposite pad, without as far as it goes beyond the scope of the invention.
  • an elastic plug (68), shown in phantom in Figure 2, can be introduced into the cavity (43) to close it and prevent it from filling and clogging the device with waste, earth or other.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Road Paving Structures (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Road Repair (AREA)
  • Recording Measured Values (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

A latch has spaced inner and outer plates formed with respective coaxial bores. The outer plate is formed at its bore with at least one notch and the inner plate is formed adjacent its bore with at least two angularly offset and axially extending cutouts. A plug extending through the bores and rotatable therein about the axis has an outer head in the outer bore and accessible from outside the plates and an opposite inner end exposed inward past the inner plate. A locking dog extends radially from the plug in the space between the plates. An inner abutment washer is secured to the inner end of the plug and spaced axially inward of the inner plate and a retaining washer angularly nondisplaceable on the inner end of the plug has a bump engageable in the cutouts of the inner plate. A compression spring braced between the washers urges the bump into the cutouts. A key engageable with the plug head has a radial tab complementary with the notch of the outer plate. The plug with the pawl and retaining washer are angularly displaceable about the axis between a locking position in which the tab and notch can interfit and the bump of the retaining washer engages one of the cutouts of the inner plate and a freeing position in which the tab and notch cannot interfit and the bump of the retaining washer engages the other cutout of the inner plate. A formation on the inner end of the plug is shaped to be engaged for rotation of the plug from inside the inner plate.

Description

Le brevet français 2 376 919 au nom du demandeur décrit un dispositif de verrouillage composé d'un verrou pivotant, logé dans une cavité du tampon et dont la partie supérieure est munie d'un logement qui, apte à coopérer avec un organe d'actionnement ménagé à l'extrémité inférieure d'une clé amovible, est disposé angulaire- ment de manière à ne coïncider qu'en position de fermeture avec le logement ménagé dans la paroi supérieure de la cavité et correspondant, en forme et dimensions, à celles de l'organe d'actionnement.French patent 2,376,919 in the name of the applicant describes a locking device composed of a pivoting lock, housed in a cavity of the buffer and the upper part of which is provided with a housing which, capable of cooperating with an actuating member formed at the lower end of a removable key, is arranged angularly so as to coincide only in the closed position with the housing formed in the upper wall of the cavity and corresponding, in shape and dimensions, to those of the actuator.

Ainsi, lorsque le regard est verrouillé, le verrou est toujours en position d'attente de la clé et lorsqu'il est ouvert, la clé est inséparable du tampon et exige donc d'être actionnée, dans le sens du verrouillage, pour être libérée, ce qui empêche que le tampon puisse être fermé et non verrouillé.Thus, when the manhole is locked, the lock is still in the waiting position for the key and when it is open, the key is inseparable from the pad and therefore requires to be actuated, in the locking direction, to be released. , which prevents the pad from being closed and not locked.

L'usage montre que le verrouillage au moyen de pièces brutes de démoulage, donc sensibles à des variations dimensionnelles, conduit à des jeux de fonctionnement aléatoires pouvant même empêcher le fonctionnement.The practice shows that the locking by means of unmolded raw parts, therefore sensitive to dimensional variations, leads to random operating clearances which can even prevent operation.

Par ailleurs, pour certaines applications, le dispositif de verrouillage doit pouvoir être actionné de l'intérieur, c'est-à-dire à partir du trou d'homme ; or, le dispositif décrit dans le brevet français précité, s'il interdit tout actionnement par l'extérieur au moyen de clés autres que celles fournies, et toute fermeture sans verrouillage, n'est pas conçu pour être actionné par l'intérieur.Furthermore, for certain applications, the locking device must be able to be actuated from the inside, that is to say from the manhole; However, the device described in the aforementioned French patent, if it prohibits any actuation from the outside by means of keys other than those provided, and any closing without locking, is not designed to be actuated from the inside.

L'objet de la présente invention est donc de fournir un dispositif de verrouillage de tampon qui, tout en conservant une structure obligeant à verrouiller pour récupérer la clé, supprime les inconvénients de fonctionnement inhérent à la fabrication et permettre l'actionnement du dispositif par l'intérieur.The object of the present invention is therefore to provide a buffer locking device which, while retaining a structure requiring locking in order to recover the key, eliminates the operating disadvantages inherent in manufacturing and allows actuation of the device by the inside.

La tête du verrou fait saillie dans la cavité et est solidaire en rotation d'un panneton apte à pivoter en décrivant une trajectoire débouchant hors du tampon, tandis que sa tige, d'une part, est guidée en rotation par une paroi inférieure, espacée d'une paroi supérieure comportant la cavité et délimitant avec la paroi un espace dans lequel est disposé le panneton, d'autre part, est liée en rotation à une rondelle crantée, apte à coopérer avec des rainures de positionnement ménagées dans la face inférieure de la paroi inférieure, de plus, constitue support pour un ressort prenant appui sur la rondelle crantée et sur une autre rondelle calée en translation à l'extrémité de cette tige, et, enfin est munie à son extrémité inférieure d'un profil polygonal actionnable par une clé.The head of the bolt protrudes into the cavity and is integral in rotation with a bit capable of pivoting by describing a trajectory opening out of the buffer, while its rod, on the one hand, is guided in rotation by a lower, spaced wall an upper wall comprising the cavity and delimiting with the wall a space in which the bit is disposed, on the other hand, is linked in rotation to a notched washer, able to cooperate with positioning grooves formed in the lower face of the lower wall, moreover, constitutes a support for a spring bearing on the notched washer and on another washer wedged in translation at the end of this rod, and, finally, is provided at its lower end with a polygonal profile actuable by a key.

Avec ce dispositif, le verrouillage proprement dit est assuré par le panneton dont le positionnement angulaire est indiqué à l'opérateur par la rondelle crantée coopérant avec les rainures de la paroi inférieure. De par sa structure, ce dispositif est insensible aux variations dimensionnelles et, de plus, peut être actionné de l'extérieur, avec une clé appropriée, et de l'intérieur.With this device, the actual locking is ensured by the bit whose angular positioning is indicated to the operator by the notched washer cooperating with the grooves of the lower wall. Due to its structure, this device is insensitive to dimensional variations and, in addition, can be operated from the outside, with an appropriate key, and from the inside.

D'autres caractéristiques et avantages ressortiront de la description qui suit en référence au dessin schématique annexé représentant à titre d'exemple une forme d'exécution de ce dispositif.Other characteristics and advantages will emerge from the description which follows with reference to the appended schematic drawing showing by way of example an embodiment of this device.

  • Figure 1 est une vue en plan par-dessus d'un regard muni de ce dispositif ;Figure 1 is a plan view over a manhole provided with this device;
  • Figure 2 est une vue partielle de côté en coupe montrant, à échelle agrandie, le mécanisme du dispositif ;Figure 2 is a partial side view in section showing, on an enlarged scale, the mechanism of the device;
  • Figures 3 et 4 sont des vues en perspective respectivement de la clé et du verrou ;Figures 3 and 4 are perspective views of the key and the latch respectively;
  • Figure 5 est une vue en perspective de la rondelle crantée ;Figure 5 is a perspective view of the notched washer;
  • Figure 6 est une vue partielle du tampon en coupe transversale suivant un plan diamétral de la cavité.Figure 6 is a partial view of the pad in cross section along a diametrical plane of the cavity.

A la figure 1, (2a-2b) désignent deux tampons de chaussée articulés autour d'axes (1) par rapport à un cadre fixe (3). Chaque tampon, de forme générale trapézoïdale, comporte à l'opposé de son articulation (1) des excroissances (4) destinées à pénétrer dans l'intervalle délimité entre l'embase (3) et l'extrémité de l'autre tampon. Le dispositif de verrouillage est disposé, dans cette forme d'exécution, dans chacune des excroissan- . ces (4).In Figure 1, (2a-2b) denote two road buffers articulated around axes (1) relative to a fixed frame (3). Each buffer, of generally trapezoidal shape, has, opposite its articulation (1), protuberances (4) intended to penetrate into the interval delimited between the base (3) and the end of the other buffer. The locking device is arranged, in this embodiment, in each of the protrusions. these (4).

A cet effet, et comme montré à la figure 6, chacune des excroissances (4) est composée d'une paroi supérieure (40) et d'une paroi inférieure (41) délimitant entre elles un espace (42). La paroi supérieure (40) est traversée par un alésage circulaire épaulé (43), de grand diamètre, constituant la cavité, tandis que la paroi (42) est traversée par un alésage (44), de petit diamètre et coaxial au premier.To this end, and as shown in FIG. 6, each of the protrusions (4) is composed of an upper wall (40) and a lower wall (41) delimiting between them a space (42). The upper wall (40) is crossed by a stepped circular bore (43), of large diameter, constituting the cavity, while the wall (42) is crossed by a bore (44), of small diameter and coaxial with the first.

Comme montré à la figure 6, l'alésage (43) comporte latéralement, et diamétralement opposé dans cette forme d'exécution, deux rainures verticales (45) débouchant dans l'espace (42). Ces rainures (45) communiquent avec des rainures semi-circulaires (46) sous-jacentes à un redan (47). Les rainures (46) débouchent dans des rainures verticales (48) borgnes vers le haut. De la face inférieure (49) de la paroi (41) débouchent des rainures (50) disposées radialement par rapport à l'alésage (44). Ces rainures de positionnement sont au nombre de quatre et sont alignées, deux par deux, sur deux axes perpendiculaires, parallèles l'un à l'axe longitudinal des rainures verticales (48). Le verrou, désigné de façon générale par (7), est composé d'une tête cylindrique (51) munie à sa partie inférieure d'un méplat (52). Sur toute sa hauteur, la tête est munie d'une rainure longitudinale (53). Sa tige (51a), également cylindrique, est munie de deux méplats latéraux (54), parallèles aux méplats (52), et se termine par un embout polygonal (55). Dans cette forme d'exécution, cet embout a une section carrée.As shown in Figure 6, the bore (43) comprises laterally, and diametrically opposite in this embodiment, two vertical grooves (45) opening into the space (42). These grooves (45) communicate with semicircular grooves (46) underlying a step (47). The grooves (46) open into vertical blind grooves (48) upwards. From the underside (49) of the wall (41) open grooves (50) arranged radially relative to the bore (44). These positioning grooves are four in number and are aligned, two by two, on two perpendicular axes, one parallel to the longitudinal axis of the vertical grooves (48). The lock, generally designated by (7), is composed of a cylindrical head (51) provided at its lower part with a flat (52). Over its entire height, the head is provided with a longitudinal groove (53). Its rod (51a), also cylindrical, is provided with two lateral flats (54), parallel to the flats (52), and ends with a polygonal end piece (55). In this embodiment, this nozzle has a square section.

Lorsque le verrou (7) est mis en place dans la cavité, sa tige peut pivoter librement dans l'alésage (44) de la paroi (41), tandis que sa tête, dépassant de l'intérieur de la cavité (43), est liée en rotation par le méplat (52) à un panneton (56). Ce panneton ne repose pas directement sur la paroi inférieure (42), mais par l'intermédiaire d'une rondelle (57) en matériau synthétique à faible coefficient de frottement.When the latch (7) is placed in the cavity, its rod can pivot freely in the bore (44) of the wall (41), while its head, protruding from the interior of the cavity (43), is linked in rotation by the flat (52) to a bit (56). This bit does not rest directly on the lower wall (42), but by means of a washer (57) made of synthetic material with a low coefficient of friction.

La tige (51a) du verrou (7) est liée en rotation, par ses méplats (54), à une rondelle (58) qui, comme montré plus en détail à la figure 5, est munie de deux crans diamétraux (59) saillant de sa face supérieure. Cette rondelle est également réalisée en matériau synthétique à faible coefficient de frottement. Elle est plaquée, contre la face inférieure (49) de la paroi inférieure (41), par un ressort hélicoïdal (60) prenant appui sur une rondelle inférieure (61) arrêtée en translation par une goupille transversale (62) traversant la tige.The rod (51a) of the lock (7) is linked in rotation, by its flats (54), to a washer (58) which, as shown in more detail in FIG. 5, is provided with two projecting diametric notches (59) from its upper side. This washer is also made of synthetic material with a low coefficient of friction. It is pressed against the lower face (49) of the lower wall (41), by a helical spring (60) bearing on a lower washer (61) stopped in translation by a transverse pin (62) passing through the rod.

On conçoit aisément que la rotation du verrou (7) se communique au panneton (56) et, simultanément, à la rondelle (58) dont les crans s'effacent des .rainures (50). En fin de rotation, les crans (59) rencontrent à nouveau les rainures (50) de la paroi inférieure et indiquent ainsi que le panneton est dans son autre position.It is easily understood that the rotation of the lock (7) is communicated to the bit (56) and, simultaneously, to the washer (58) whose notches are erased from the .rainures (50). At the end of rotation, the notches (59) again meet the grooves (50) of the lower wall and thus indicate that the bit is in its other position.

Ce dispositif simple peut indifféremment être actionné par la tête du verrou (7) ou par l'embout polygonal (55), c'est-à-dire de l'extérieur ou de l'intérieur du trou d'homme.This simple device can either be actuated by the head of the lock (7) or by the polygonal end piece (55), that is to say from the outside or from the inside of the manhole.

L'actionnement par l'extérieur est assuré par un organe d'entraînement, désigné de façon générale par (63) à la figure 3, composé d'une douille (64) dont le diamètre extérieur est égal, au jeu près, au diamètre de la cavité (43) et dont le diamètre de l'alésage interne (65) est égal, au jeu près, au diamètre extérieur de la tête du verrou (7). Cet alésage (65) est muni d'une clavette longitudinale interne (66) apte à coopérer et à s'engager dans la rainure (53) de la tête (51) du verrou. A son extrémité antérieure, la douille (64) est munie de deux tenons radiaux (67) aptes à pénétrer dans les rainures verticales (45) de la paroi supérieure (40) pour s'engager, sous le redan (47), dans les rainures circulaires (46) et venir, en fin de mouvement d'ouverture, dans les rainures verticales borgnes (48). Bien entendu, après fermeture du tampon, et pour verrouiller le regard, il suffit d'actionner l'organe d'entraînement (63) en sens inverse, c'est-à-dire en l'enfonçant vers le bas pour dégager ses tenons (67) des lumières (48) avant de le faire pivoter jusqu'à ce que ses tenons viennent au niveau des lumières verticales (45), permettant sa libération du tampon.The actuation from the outside is ensured by a drive member, generally designated by (63) in FIG. 3, composed of a bush (64) whose outside diameter is equal, apart from play, to the diameter of the cavity (43) and whose diameter of the internal bore (65) is equal, apart from play, to the outside diameter of the head of the latch (7). This bore (65) is provided with an internal longitudinal key (66) capable of cooperating and engaging in the groove (53) of the head (51) of the lock. At its anterior end, the sleeve (64) is provided with two radial pins (67) capable of penetrating into the vertical grooves (45) of the upper wall (40) to engage, under the step (47), in the circular grooves (46) and come, at the end of the opening movement, into the vertical blind grooves (48). Of course, after closing the buffer, and to lock the manhole, it suffices to actuate the drive member (63) in the opposite direction, that is to say by pushing it down to release its tenons (67) lights (48) before rotating it until its pins come at the level of the vertical lights (45), allowing its release from the buffer.

La clé d'actionnement ne peut être retirée que lorsque le panneton (56) est en position verrouillée.The actuation key can only be removed when the bit (56) is in the locked position.

La figure 1 montre que le verrouillage des tampons, qui normalement s'effectue par engagement du panneton dans un logement approprié de l'embase (3), peut aussi être effectué par engagement du panneton dans un logement ménagé sur le tampon opposé, sans pour autant que l'on sorte du cadre de l'invention.FIG. 1 shows that the locking of the buffers, which normally takes place by engaging the bit in an appropriate housing of the base (3), can also be carried out by engaging the bit in a housing formed on the opposite pad, without as far as it goes beyond the scope of the invention.

Enfin, un bouchon élastique (68), représenté en traits mixtes figure 2, peut être introduit dans la cavité (43) pour l'obturer et éviter son remplissage et l'encrassement du dispositif par des déchets, de la terre ou autre.Finally, an elastic plug (68), shown in phantom in Figure 2, can be introduced into the cavity (43) to close it and prevent it from filling and clogging the device with waste, earth or other.

Claims (5)

1. A locking device for a manhole cover of the type consisting of a pivoting lock (7) housed in a cavity (43) of the cover (2a-2b) and the upper portion of which is provided with a recess which, intended to cooperate with an actuating device (63) housed at the lower end of a removable key, is arranged at an angle so as not to coincide, except in the closing position, with the recess housed in the upper wall of the cavity and corresponding in form and dimensions to those of the actuating device, characterised in that the head (51) of the lock (7) projects into the cavity (43) and is rigidly rotatable with a key bit (56) intended to pivot by describing a path which opens out outside the cover, whereas its stem (51a) is on the one hand guided in rotation by a lower wall (41) at a distance from an upper wall (40) comprising the cavity (43) and defining with the wall (41) a space (42) in which the key bit is disposed, and is on the other hand connected in rotation to a corrugated washer (58) intended to cooperate with positioning grooves (50) housed in the lower face of the lower wall (41), and additionally forms a support for a spring (60) abutting the corrugated washer (59) and abutting another washer (61) wedged on the end of this stem (51a), and finally is provided at its lower end with a polygonal profile (55) which is actuatable by means of a key.
2. A locking device according to claim 1 characterised in that a washer (57) made of a synthetic material having a low friction coefficient is interposed between the key bit (56) and the upper face of the lower wall (41) of the cavity (43).
3. A device according to one of claims 1 and 2, characterised in that the corrugated washer (58) is made of a synthetic material having a low friction coefficient.
4. A device according to any one of claims 1 to 3, characterised in that the actuating device (63) is in the form of a sleeve intended to cover the head of the lock, and comprises an internal longitudinal key (66) intended to cooperate with an external longitudinal groove (53) of the said head, and two radial tappets (67) projecting laterally and intended to cooperate with a groove housed in the upper wall (40) of the cavity, the groove being formed by two vertical grooves (45) traversing the wall and communicating in each case with a semi-circular groove (46) subjacent to a step acting as a stop (47).
5. A device according to claim 4, characterised in that each of the semi-circular grooves (46) of the cavity (43) opens contrary to its zone of communication with the vertical inlet groove (45) with another vertical groove (48), which is blind at the top.
EP85420150A 1984-09-12 1985-08-09 Locking device for a manhole cover Expired EP0176451B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85420150T ATE33159T1 (en) 1984-09-12 1985-08-09 SECURING DEVICE FOR MANHOLE COVER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8414229 1984-09-12
FR8414229A FR2570106B2 (en) 1984-09-12 1984-09-12 LOCKING DEVICE FOR PAVEMENT OF LOAD

Publications (2)

Publication Number Publication Date
EP0176451A1 EP0176451A1 (en) 1986-04-02
EP0176451B1 true EP0176451B1 (en) 1988-03-23

Family

ID=9307783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85420150A Expired EP0176451B1 (en) 1984-09-12 1985-08-09 Locking device for a manhole cover

Country Status (9)

Country Link
US (1) US4627249A (en)
EP (1) EP0176451B1 (en)
AT (1) ATE33159T1 (en)
CA (1) CA1265693A (en)
DE (1) DE3561960D1 (en)
ES (1) ES296208Y (en)
FR (1) FR2570106B2 (en)
MA (1) MA20506A1 (en)
OA (1) OA08163A (en)

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US5095593A (en) * 1989-07-31 1992-03-17 American Cord & Webbing Co. Locking device with two members for attaching objects
US4980955A (en) * 1989-07-31 1991-01-01 American Cord & Webbing Co., Inc. Locking device
DE9006130U1 (en) * 1990-05-30 1990-08-02 Kessel, Bernhard, 8071 Lenting Securing device for a cover
US5413392A (en) * 1993-04-06 1995-05-09 Southco, Inc. Pawl assembly
US6067827A (en) * 1998-05-04 2000-05-30 Mcgard, Inc. Lock construction
US6018969A (en) * 1998-05-04 2000-02-01 Mcgard, Inc. Lock construction
FR2780996B1 (en) * 1998-07-10 2000-08-11 Norinco DEVICE FOR LOCKING AND UNLOCKING WITH A KEY OF A BUFFER ON A FRAME
NO319002B1 (en) * 2001-01-23 2005-06-06 Fitjar Betongindustri As Method and apparatus for joining adjacent elements, such as plate members
US8459703B2 (en) * 2005-04-11 2013-06-11 Southco, Inc. Pawl assembly
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
US20070081856A1 (en) * 2005-10-12 2007-04-12 Degreef Richard Method and apparatus for locking a manhole cover
WO2007137420A1 (en) * 2006-05-30 2007-12-06 Ismail Cemil Suatac Adjustable manhole cover assembly
CN101883631B (en) * 2007-12-03 2014-01-22 帝斯曼知识产权资产管理有限公司 System and method for producing beads
TWM370214U (en) * 2009-07-27 2009-12-01 Quanta Comp Inc Push-push type latch mechanism and electronic device thereof
US9234369B2 (en) * 2012-03-21 2016-01-12 Carrier Corporation Furnace door latch assembly
DE102012110941A1 (en) * 2012-11-14 2014-05-15 ACO Severin Ahlmann GmbH & Co Kommanditgesellschaft Lock for locking a cover
CN203879127U (en) * 2014-05-19 2014-10-15 南京东屋电气有限公司 Safety locking mechanism for lock

Citations (1)

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Publication number Priority date Publication date Assignee Title
FR2376919A1 (en) * 1977-01-05 1978-08-04 Dumortier Robert LOCKING DEVICE FOR PAVEMENT MANIFOLD OR OTHER

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US1163838A (en) * 1915-05-11 1915-12-14 Elwood F Maul Sash-fastener.
US1263104A (en) * 1915-07-12 1918-04-16 Edwin Sanford Phelps Tumbler-lock.
GB208864A (en) * 1922-11-08 1924-01-03 Charles Edward Percy Gabriel Improvements in or relating to fasteners for ventilators, doors, windows, or the like
US1604330A (en) * 1926-05-27 1926-10-26 James J Witkowski Fastening device
US1878436A (en) * 1932-01-29 1932-09-20 Burroughs Robert Irwin Lock cap for gasoline and other tanks
DE2656858A1 (en) * 1976-12-15 1978-06-22 Passavant Werke LOCKING LOCK FOR MANHOLE LID, GRATE OR DGL.
FR2429310A1 (en) * 1978-06-21 1980-01-18 Telemecanique Electrique CLOSING DEVICE FOR A DOOR OR THE LIKE

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
FR2376919A1 (en) * 1977-01-05 1978-08-04 Dumortier Robert LOCKING DEVICE FOR PAVEMENT MANIFOLD OR OTHER

Also Published As

Publication number Publication date
ES296208U (en) 1987-12-16
US4627249A (en) 1986-12-09
ATE33159T1 (en) 1988-04-15
ES296208Y (en) 1988-05-16
CA1265693A (en) 1990-02-13
OA08163A (en) 1987-03-31
EP0176451A1 (en) 1986-04-02
DE3561960D1 (en) 1988-04-28
MA20506A1 (en) 1986-04-01
FR2570106A2 (en) 1986-03-14
FR2570106B2 (en) 1986-12-19

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