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EP1882779B1 - Locking and unlocking device using a key for a stamp or a cover on a frame, in particular of a manhole cover - Google Patents

Locking and unlocking device using a key for a stamp or a cover on a frame, in particular of a manhole cover Download PDF

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Publication number
EP1882779B1
EP1882779B1 EP20070290900 EP07290900A EP1882779B1 EP 1882779 B1 EP1882779 B1 EP 1882779B1 EP 20070290900 EP20070290900 EP 20070290900 EP 07290900 A EP07290900 A EP 07290900A EP 1882779 B1 EP1882779 B1 EP 1882779B1
Authority
EP
European Patent Office
Prior art keywords
bolt
key
arm
casing
wall
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.)
Not-in-force
Application number
EP20070290900
Other languages
German (de)
French (fr)
Other versions
EP1882779A1 (en
Inventor
Philippe Javaux
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.)
Norinco SA
Original Assignee
Norinco SA
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Filing date
Publication date
Application filed by Norinco SA filed Critical Norinco SA
Publication of EP1882779A1 publication Critical patent/EP1882779A1/en
Application granted granted Critical
Publication of EP1882779B1 publication Critical patent/EP1882779B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • Y10T70/00—Locks
    • Y10T70/50—Special application
    • Y10T70/5093—For closures
    • Y10T70/554—Cover, lid, cap, encasing shield

Definitions

  • the present invention relates to a device for locking and unlocking with the aid of a key of a buffer or cover on a frame, especially a manhole.
  • US-2608085 A discloses such a device comprising a lock secured to the buffer which has an opening opening access to the lock for the key having an arm whose end allows to operate the lock when the key is inserted into the opening of the buffer of a position of locking in which a bolt of the lock is held prisoner of a striker of the frame to an unlocked position for which the bolt is released from the striker.
  • the present invention aims to provide a device for locking and unlocking with the aid of a key of a buffer or cover on a frame, which is particularly suitable for ensuring the safety of children and has a structure simple and economical.
  • the device for unlocking and locking with the aid of a key of a buffer or cover on a frame comprising a latch secured to the buffer which has an opening opening to access the latch for the key comprising an arm whose one end makes it possible to maneuver the latch when the key is inserted into the opening of the buffer of a locking position in which a bolt of the lock is held prisoner of a striker of the frame at a position of unlocking device for which the bolt is released from the striker, is characterized in that the bolt is removably mounted and guided in translation in a buffer housing, is held in its locking position by a helical compression spring interposed between the bolt and a bottom wall of the housing, and at its end adjacent to the spring having a branch transverse to the longitudinal direction of the bolt extending through two guide grooves respectively formed in two side walls of the housing parallel to the longitudinal direction of the bolt, at least one of the guide grooves through the corresponding side wall of the housing and in which can the end of the arm of the key which can act
  • the side wall of the housing comprising the through groove further comprises a slot perpendicular to this wall, opening into the through groove and allowing the insertion of the operating end of the key arm in the groove.
  • the key comprises a handle parallel to the arm with maneuvering end and a bar connecting the handle to the arm, the handle, the bar and the arm with the operating end of the key being located in the same plane and the opening of the buffer allowing accessing the latch being a slot extending in a plane perpendicular to the longitudinal direction of the bolt and allowing the introduction of the arm and its maneuvering end by displacement in its own plane of the key perpendicular to the plane of the pad, the actuating end of the arm of the key can be introduced into the groove through the wall of the lock housing by translation of the arm parallel to the slot of the buffer towards the housing and able to act on the transverse branch of the bolt to move it to its unobstructed position the lock by rotating the handle of the key in the corresponding direction around the bar of this key.
  • the pad comprises, extending perpendicularly below it, at least one wall parallel to the slot extending from it and allowing the end of the arm of the key to be guided towards the through-groove of the wall of the housing. lock.
  • the pad may comprise two walls for guiding the arm of the key and one of which has at its end facing the lock housing a plate diverging from the other wall of the guide and allowing a limited rotation of the arm of the the key in the direction of the release of the bolt of the striker once the operating end of the arm introduced into the through groove of the wall of the housing.
  • the free end of operation of the arm of the key is bent so as to extend parallel to the arm towards the handle and in the opposite direction to the bar connecting the arm to the handle.
  • a wedge is secured to the pad and at least one guide wall of the key on the latch housing side and is shaped so as to fit into the substantially U-shaped portion defined by the arm of the key. between the bar and the curved end of this arm, when the operating end of the arm is inserted into the through-groove of the wall of the housing.
  • the bolt comprises two flexible tongues located in the same plane as the transverse branch of the bolt opposite it from diverging from each other in the opposite direction to the transverse branch and allowing the retention of the bolt in the housing after latching, when mounting the bolt in this housing, tabs respectively in two windows formed in the two side walls of the housing opposite the bottom wall and the two guide grooves of the transverse branch of the bolt, the free ends of flexible tongues being in support, in the locking position of the buffer and under the action of the restoring force of the spring, on the two edges of the windows opposite the guide grooves.
  • the transverse branch of the bolt is part of a T-shaped end of the bolt.
  • the bolt is made of a plastic material, such as polyacetal, and the return spring comes from material with the bolt.
  • the bolt and its return spring are mounted in the housing by inserting them through a conjugate recess of the front wall of the housing and by pushing the bolt longitudinally in the housing against the restoring force of the spring up to the flexible tabs snap elastically into their respective windows.
  • the bolt and its return spring are mounted in the housing by longitudinal insertion through the end opening of the housing opposite the bottom wall of the housing.
  • the lock housing and the guide walls of the key arm come from casting with the pad.
  • the locking and unlocking device of the invention is particularly intended to equip a buffer, lid or the like 1 for closing a frame, frame or the like 2 defining the opening of a manhole for example.
  • This locking device can be actuated by a key 3 which will be described later.
  • the locking device comprises a latch 4 secured to the inner face of the upper wall 1a of the buffer 1, the wall having an opening 5 allowing the key 3 to access the latch 4.
  • the key 3 comprises an arm 6, one end 7 of which makes it possible to maneuver the latch 4 when the key 3 is inserted into the opening 5 of the buffer 1 in a locking position in which a bolt 8 of the latch 4 is held prisoner of a striker 9 of the frame 1 to an unlocking position for which the bolt 8 is released from the striker 9.
  • the pad 1 is shown as being of the rectangular type that can be housed in a frame of conjugate form 2, but it is understood that it can have a circular shape.
  • the bolt 8 is removably mounted and guided in translation in a lock casing 4 coming from casting with the pad 1 and extending perpendicularly to the side of the pad 1 opposite to that comprising the hinge hinge 11 of the buffer 1 to the frame 2 so that the active portion 12 of the bolt 8 bears, in the closed position of the buffer 1 on the frame 2, under the striker 9 constituted by a rib integral with the inner face of the side of the adjacent frame 2 to the housing 10.
  • the lock housing 10 has the general shape of a rectangular parallelepiped and the bolt 8 is maintained at its locking position of the buffer 1 to the frame 2 by a helical compression spring 13 mounted prestressed between the bolt 8 and a bottom wall 14 of the housing 10 opposite the active portion 12 of the bolt 8.
  • the bolt 8 comprises a T-shaped end portion 15 whose end branch 16 extends transversely to the longitudinal direction of the bolt 8.
  • the latter further comprises two flexible tongues 17 situated in the same plane as the portion 15 in FIG. T-shape and which diverge from each other in the opposite direction to the transverse branch 16 and, consequently, to the active portion 12 of the bolt 8.
  • the bolt 8 and the return spring 13 are made in one piece from a plastic material, for example based on polyacetal.
  • the active portion 12, the flexible tongues 17, the T-shaped portion 15 and the return spring 13 are symmetrical relative to the longitudinal median plane of the bolt 8.
  • the tongues 17 can move elastically toward each other at a position substantially parallel to the longitudinal axis of the bolt 8.
  • polyacetal as material constituting the bolt 8 is advantageous in that it has a good viscosity index and, therefore, a good life despite the friction that can occur between the bolt 8 and the pig iron
  • This material also has the advantage that it makes it easy to integrate the compression spring 13 behind the bolt 8.
  • the housing 10 comprises two grooves 18, only one of which is clearly visible, respectively formed in the two lateral walls 19 of the housing 10 perpendicular to the upper wall 1a of the buffer 1, the two grooves 18 extending parallel to the longitudinal direction of the housing 10 to the bottom wall 14 thereof. At least one of the grooves 18, the one closest to the opening 5 of the buffer 1, through the corresponding side wall 19 of the housing 10 and this wall has a slot 20 perpendicular to the plane of the pad 1 and opening on the one hand in the front wall 21 of the housing 10 and on the other hand in the through groove 18 to allow the introduction of the end 7 of the arm 6 of the key 3 into the groove 18 as will be seen later.
  • the two grooves 18 allow the guiding respectively of the two ends of the transverse branch 16 of the bolt 8 in the housing 10 in the longitudinal direction of the latter against the restoring force of the spring 13 when the bolt 8 is moved longitudinally in position. translation to its unlocking position of the buffer 1 of the frame 2.
  • the housing 10 further comprises two rectangular windows 22 made respectively in the two side walls 19 of this housing opposite the wall 14 and grooves 18 and extending parallel to the longitudinal direction of the housing 10 substantially in the same plane That the guide grooves 18.
  • the two windows 22 are intended to snap-fit the two flexible tongues 17 during assembly of the bolt 8 in the housing 10.
  • the front wall 21 of the housing 10 is cut in such a way as to form a shape-shaped recess conjugated to the T-shaped portion 15 and to the compression spring 13 of the bolt 8 to allow mounting of the latter in this housing.
  • the bolt 8 comprises a lug 23 projecting perpendicularly from the flat leg of the T-shaped portion 15 of the bolt 8 and for manually introducing the bolt 8 by translation in the housing 10 during assembly of the bolt.
  • This lug also makes it possible to unlock the bolt of its keeper from the inside of the manhole.
  • the key 3 comprises a handle 24 parallel to the arm 6 and a bar 25 perpendicular or inclined to the handle 24 and connecting the latter to the arm 6.
  • the arm 6 and its end 7, the handle 24 and the connecting rod 25 are located in the same plane and formed by deformation of a bar of rectangular cross section.
  • the end 7 of the arm 6 is connected to the latter by a bent portion at right angles so that this end extends parallel to the arm 6 towards the handle 24 and in the opposite direction to the bar 25.
  • the key 3 thus has a shape generally in G with the handle 24 of greater length than that of the arm 6 and its end 7.
  • the opening 5 of the tampon 1 is constituted by an elongate slot parallel to the side of the pad 1 opposite its articulation 11 to the frame 2 and which is located in a plane perpendicular to the longitudinal direction of the casing 10.
  • the slot 5 has a length slightly greater than that of the arm 6 and its end 7 to allow the introduction of the arm 6 and its end 7 through the slot 5 by moving in its own plane of the key 3 perpendicular to the upper wall 1a of the buffer 1.
  • the buffer 1 comprises, extending perpendicularly from its internal face, two walls 26 arranged parallel to the slot 5 extending from it and allowing the guide of the end 7 of the arm 6 to the through groove 18 of the wall 19 lock housing 10.
  • the two guide walls 26 are connected to one another by a transverse wall 27 opposite the housing 10 and define an opening facing the groove 18 and the slot 20.
  • a wedge 29 is secured to the inner face of the upper wall 1a of the buffer 1 between the diverging wall 28 and the guide wall 26 and is opposite the through groove 18 and the slot 20.
  • the wedge 29 is shaped so that to fit into the substantially U-shaped portion defined by the arm 6 between the bar 25 and the curved end 7 of the key 3, when the end 7 is inserted into the slot 20 at the groove 18.
  • the wedge 29 constitutes an obstacle to the introduction of a simple hook-shaped key to try to fraudulently unlock the bolt 8 of its striker 9.
  • only the key 3 of the invention can be used, by the presence of the wedge 29, to act by its end 7 on the bolt 8 during the unlocking of the buffer 1 of its frame 2.
  • a single guide wall 26 may be provided, the one not comprising the diverging wall 28.
  • the wedge 29 is secured to the pad and this single wall 26 and the end 7 of the key 3 bears against the bottom of the through groove 18 at the position of the key corresponding to that of unlocking the bolt 8.
  • FIG. figure 8 The Figures 8 to 11 represent the mounting of the bolt 8 in the housing 10.
  • the bolt 8 is presented facing the front wall 21 of the housing 10 so that its active portion 12 is outside the housing 10 and its T-shaped portion 15 and its compression spring 10 are opposite the conjugate fingerprint made in the front wall 21 of the housing 10.
  • the bolt 8 is then introduced into the housing 10 through the wall 21 at the position represented in figure 9 and the bolt 8 is then moved in translation, by means of the gripping pin 23, into the housing 10 as indicated by the arrows F1 in FIG. figure 9 so that the two flexible tongues 17 are elastically brought closer to each other by the two end portions of the side wall 19 opposite to the bottom wall 14 as shown in FIG.
  • the bolt 8 and its return spring 13 can be mounted in the housing 10 by inserting them longitudinally through the opening opening of the housing 10 opposite its bottom wall 14.
  • the unlocking of the buffer 1 of its frame 2 is as follows.
  • the arm 6 and its end 7 of the key 3 are introduced into the slot 5 of the buffer 1 so that the arm 6 and its end 7 arrives at the position shown in FIG. figure 14 at which a portion of the bar 25 of the key 3 is located between the two guide walls 26 and in the vicinity of the transverse wall 27, the end 7 being at a substantially greater level relative to the wedge 29.
  • the key 3 can be moved in a guided manner by the walls 26 in a direction perpendicular to the longitudinal direction of the housing 10 as indicated by the arrow F2 in figure 14 so that the arm 6 and its end 7 arrive at the position shown in FIG.
  • FIGs 16 and 17 show that by turning the key 3 around the bar 25 in the direction indicated by the arrow F4 ( figure 17 ), the arm 6 and its end 7 pivot in the same direction as symbolized by the arrow F5 in figure 16 so that the end 7 acts on the corresponding end of the transverse branch 16 of the bolt 8 to move the latter in rectilinear translation and guided in the grooves 18 of the housing 10 against the return force of the spring 13 and to a position at which the active portion 12 of the bolt 8 is released from the striker 9 of the frame 2.
  • the pivoting of the arm 6 and its end 7 to disengage the bolt 8 of the striker 9 is limited by the diverging wall 28 .
  • the pad 1 can be lifted using the handle 27 of the key 3 around its hinge axis 11 to the frame 2 to its open position completely cleared of this framework.
  • the bolt 8 In unlocked position of the buffer 1, the bolt 8 is returned to its locking position by the compression spring 13.
  • the key 3 can be used to return the buffer 1 to its closed position of the frame 2 by tilting around the articulation 11 until the active part 12 of the bolt 8 engages automatically under the striker 9 against the return force of the spring 13, but the key 3 can be all simply removed from the buffer 1 before tipping the buffer 1 under its own weight to its locked position locked to the frame 2 by the bolt 8.
  • the guide walls 26, 28 can come from casting with the buffer 1.
  • the bolt 8 can be removed from its housing 10 by bringing the two tongues 17 together and pulling the bolt 8 through the conjugate recess of the front wall 21 of the housing after having moved the bolt 8 longitudinally. look at this footprint. If necessary, the bolt 8 can be removed from the housing 10 by pulling it longitudinally out of the housing after bringing the two tabs 17 close to one another.
  • the locking and unlocking device of the invention is an extremely simple and economical structure and is particularly suitable for locking a pad or cover ensuring the safety of a child. Indeed, the fact that a child has a limited force, the realization of a plastic bolt provides the bolt resistance sufficient to ensure this security. In addition, the extremely simple configuration of the key 3 in combination with the spacer 29 at the exit of the insertion slot of the active part 7 of this key prevents the use of any other key in the form of a simple hook to fraudulently unlock the key. buffer 1 of its frame 2.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Lock And Its Accessories (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Road Paving Machines (AREA)
  • Road Signs Or Road Markings (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

The device has a bolt (8) removably assembled and guided in translation in a housing (10) of a plug. A helical compression spring (13) that is interposed between the bolt and a base wall (14) of the housing maintains the bolt in a locked position. The bolt includes a transversal branch (16) on which an end (7) of a key (3) acts upon for displacing the bolt to an unlocking position of the plug of a frame. The bolt is made of a plastic material i.e. polyacetal.

Description

La présente invention concerne un dispositif de verrouillage et de déverrouillage à l'aide d'une clé d'un tampon ou couvercle sur un cadre, notamment de regard de chaussée.The present invention relates to a device for locking and unlocking with the aid of a key of a buffer or cover on a frame, especially a manhole.

Le document US-2608085 A divulgue un tel dispositif comprenant un verrou solidaire du tampon qui présente une ouverture débouchante d'accès au verrou pour la clé comportant un bras dont une extrémité permet de manoeuvrer le verrou lorsque la clé est introduite dans l'ouverture du tampon d'une position de verrouillage dans laquelle un pêne du verrou est retenu prisonnier d'une gâche du cadre à une position de déverrouillage pour laquelle le pêne est dégagé de la gâche.The document US-2608085 A discloses such a device comprising a lock secured to the buffer which has an opening opening access to the lock for the key having an arm whose end allows to operate the lock when the key is inserted into the opening of the buffer of a position of locking in which a bolt of the lock is held prisoner of a striker of the frame to an unlocked position for which the bolt is released from the striker.

Cependant, ce dispositif connu est d'une structure relativement complexe compte tenu des nombreux composants impliqués et est relativement coûteux.However, this known device is of a relatively complex structure given the many components involved and is relatively expensive.

La présente invention a pour but de proposer un dispositif de verrouillage et de déverrouillage à l'aide d'une clé d'un tampon ou couvercle sur un cadre, qui est adapté en particulier pour assurer la sécurité d'enfants et qui présente une structure simple et économique.The present invention aims to provide a device for locking and unlocking with the aid of a key of a buffer or cover on a frame, which is particularly suitable for ensuring the safety of children and has a structure simple and economical.

A cet effet, selon l'invention, le dispositif de déverrouillage et de verrouillage à l'aide d'une clé d'un tampon ou couvercle sur un cadre, comprenant un verrou solidaire du tampon qui présente une ouverture débouchante d'accès au verrou pour la clé comportant un bras dont une extrémité permet de manoeuvrer le verrou lorsque la clé est introduite dans l'ouverture du tampon d'une position de verrouillage dans laquelle un pêne du verrou est retenu prisonnier d'une gâche du cadre à une position de déverrouillage pour laquelle le pêne est dégagé de la gâche, est caractérisé en ce que le pêne est amoviblement monté et guidé en translation dans un boîtier du tampon, est maintenu à sa position de verrouillage par un ressort hélicoïdal de compression interposé entre le pêne et une paroi de fond du boîtier, et a son extrémité adjacente au ressort comportant une branche transversale à la direction longitudinale du pêne s'étendant au travers de deux rainures de guidage formées respectivement dans deux parois latérales du boîtier parallèlement à la direction longitudinale du pêne, au moins l'une des rainures de guidage traversant la paroi latérale correspondante du boîtier et dans laquelle peut être introduite l'extrémité du bras de la clé qui peut agir sur l'extrémité correspondante de la branche transversale de pêne pour déplacer en translation ce dernier à sa position dégagée de la gâche à l'encontre de la force de rappel du ressort.For this purpose, according to the invention, the device for unlocking and locking with the aid of a key of a buffer or cover on a frame, comprising a latch secured to the buffer which has an opening opening to access the latch for the key comprising an arm whose one end makes it possible to maneuver the latch when the key is inserted into the opening of the buffer of a locking position in which a bolt of the lock is held prisoner of a striker of the frame at a position of unlocking device for which the bolt is released from the striker, is characterized in that the bolt is removably mounted and guided in translation in a buffer housing, is held in its locking position by a helical compression spring interposed between the bolt and a bottom wall of the housing, and at its end adjacent to the spring having a branch transverse to the longitudinal direction of the bolt extending through two guide grooves respectively formed in two side walls of the housing parallel to the longitudinal direction of the bolt, at least one of the guide grooves through the corresponding side wall of the housing and in which can the end of the arm of the key which can act on the corresponding end of the transverse bolt branch is introduced to move the latter in translation to its disengaged position from the striker against the restoring force of the spring.

La paroi latérale du boîtier comportant la rainure traversante comprend en outre une fente perpendiculaire à cette paroi, débouchant dans la rainure traversante et permettant l'introduction de l'extrémité de manoeuvre du bras de la clé dans la rainure.The side wall of the housing comprising the through groove further comprises a slot perpendicular to this wall, opening into the through groove and allowing the insertion of the operating end of the key arm in the groove.

La clé comprend une poignée parallèle au bras à extrémité de manoeuvre et un barreau reliant la poignée au bras, la poignée, le barreau et le bras à extrémité de manoeuvre de la clé étant situés dans un même plan et l'ouverture du tampon permettant d'accéder au verrou étant une fente s'étendant dans un plan perpendiculaire à la direction longitudinale du pêne et permettant l'introduction du bras et de son extrémité de manoeuvre par déplacement dans son propre plan de la clé perpendiculairement au plan du tampon, l'extrémité de manoeuvre du bras de la clé pouvant être introduite dans la rainure traversant la paroi du boîtier de verrou par translation du bras parallèlement à la fente du tampon vers le boîtier et pouvant agir sur la branche transversale du pêne pour le déplacer à sa position dégagée de la gâche par rotation de la poignée de la clé dans le sens correspondant autour du barreau de cette clé.The key comprises a handle parallel to the arm with maneuvering end and a bar connecting the handle to the arm, the handle, the bar and the arm with the operating end of the key being located in the same plane and the opening of the buffer allowing accessing the latch being a slot extending in a plane perpendicular to the longitudinal direction of the bolt and allowing the introduction of the arm and its maneuvering end by displacement in its own plane of the key perpendicular to the plane of the pad, the actuating end of the arm of the key can be introduced into the groove through the wall of the lock housing by translation of the arm parallel to the slot of the buffer towards the housing and able to act on the transverse branch of the bolt to move it to its unobstructed position the lock by rotating the handle of the key in the corresponding direction around the bar of this key.

Le tampon comprend, s'étendant perpendiculairement sous celui-ci, au moins une paroi parallèle à la fente en prolongement de celle-ci et permettant le guidage de l'extrémité du bras de la clé vers la rainure traversante de la paroi du boîtier de verrou.The pad comprises, extending perpendicularly below it, at least one wall parallel to the slot extending from it and allowing the end of the arm of the key to be guided towards the through-groove of the wall of the housing. lock.

Le tampon peut comporter deux parois de guidage du bras de la clé et dont l'une d'entre elles comporte à son extrémité en regard du boîtier de verrou une plaque divergeant de l'autre paroi du guidage et permettant une rotation limitée du bras de la clé dans le sens du dégagement du pêne de la gâche une fois l'extrémité de manoeuvre du bras introduite dans la rainure traversante de la paroi du boîtier.The pad may comprise two walls for guiding the arm of the key and one of which has at its end facing the lock housing a plate diverging from the other wall of the guide and allowing a limited rotation of the arm of the the key in the direction of the release of the bolt of the striker once the operating end of the arm introduced into the through groove of the wall of the housing.

De préférence, l'extrémité libre de manoeuvre du bras de la clé est recourbée de manière à s'étendre parallèlement au bras vers la poignée et en sens opposé au barreau de liaison du bras à la poignée.Preferably, the free end of operation of the arm of the key is bent so as to extend parallel to the arm towards the handle and in the opposite direction to the bar connecting the arm to the handle.

Avantageusement, une cale est solidaire du tampon et d'au moins une paroi de guidage de la clé du côté du boîtier de verrou et est conformée de manière à s'adapter dans la partie sensiblement en forme de U définie par le bras de la clé entre le barreau et l'extrémité recourbée de ce bras, lorsque l'extrémité de manoeuvre du bras est introduite dans la rainure traversante de la paroi du boîtier.Advantageously, a wedge is secured to the pad and at least one guide wall of the key on the latch housing side and is shaped so as to fit into the substantially U-shaped portion defined by the arm of the key. between the bar and the curved end of this arm, when the operating end of the arm is inserted into the through-groove of the wall of the housing.

Le pêne comprend deux languettes flexibles situées dans le même plan que la branche transversale du pêne à l'opposé de celle-ci en divergeant l'une de l'autre en sens opposé à la branche transversale et permettant le maintien du pêne dans le boîtier de verrou après encliquetage, lors du montage du pêne dans ce boîtier, des languettes respectivement dans deux fenêtres formées dans les deux parois latérales du boîtier à l'opposé de sa paroi de fond et des deux rainures de guidage de la branche transversale du pêne, les extrémités libres des languettes flexibles étant en appui, en position de verrouillage du tampon et sous l'action de la force de rappel du ressort, sur les deux bords des fenêtres opposés aux rainures de guidage.The bolt comprises two flexible tongues located in the same plane as the transverse branch of the bolt opposite it from diverging from each other in the opposite direction to the transverse branch and allowing the retention of the bolt in the housing after latching, when mounting the bolt in this housing, tabs respectively in two windows formed in the two side walls of the housing opposite the bottom wall and the two guide grooves of the transverse branch of the bolt, the free ends of flexible tongues being in support, in the locking position of the buffer and under the action of the restoring force of the spring, on the two edges of the windows opposite the guide grooves.

La branche transversale du pêne fait partie d'une extrémité en forme de T du pêne.The transverse branch of the bolt is part of a T-shaped end of the bolt.

De préférence, le pêne est réalisé en une matière plastique, tel que du polyacétal, et le ressort de rappel vient de matière avec le pêne.Preferably, the bolt is made of a plastic material, such as polyacetal, and the return spring comes from material with the bolt.

Le pêne et son ressort de rappel sont montés dans le boîtier en les insérant au travers d'une empreinte conjuguée de la paroi frontale du boîtier et en poussant longitudinalement le pêne dans le boîtier à l'encontre de la force de rappel du ressort jusqu'à ce que les languettes flexibles s'encliquettent élastiquement dans leurs fenêtres respectives.The bolt and its return spring are mounted in the housing by inserting them through a conjugate recess of the front wall of the housing and by pushing the bolt longitudinally in the housing against the restoring force of the spring up to the flexible tabs snap elastically into their respective windows.

En variante, le pêne et son ressort de rappel sont montés dans le boîtier par insertion longitudinale au travers de l'ouverture d'extrémité du boîtier opposée à la paroi de fond du boîtier.Alternatively, the bolt and its return spring are mounted in the housing by longitudinal insertion through the end opening of the housing opposite the bottom wall of the housing.

Le boîtier de verrou et les parois de guidage du bras de la clé viennent de fonderie avec le tampon.The lock housing and the guide walls of the key arm come from casting with the pad.

L'invention sera mieux comprise, et d'autres buts, caractéristiques, détails et avantages de celle-ci apparaîtront plus clairement dans la description explicative qui va suivre faite en référence aux dessins annexés donnés uniquement à titre d'exemple illustrant un mode de réalisation de l'invention et dans lesquels :

  • la figure 1 est une vue en perspective d'un tampon monté articulé sur un cadre en position entrouverte et pourvu d'un dispositif de verrouillage et de déverrouillage conforme à l'invention ;
  • la figure 2 est une vue partielle en perspective de dessus de l'ensemble de la figure 1 et montrant la gâche du cadre permettant le verrouillage du tampon à ce cadre ;
  • la figure 3 est une vue de dessus du tampon de la figure 1 ;
  • la figure 4 est une vue de dessous du tampon de la figure 1 et montrant le verrou conforme à l'invention ;
  • la figure 5 est une vue agrandie du verrou de l'invention sans son pêne ;
  • la figure 6 est une vue en perspective du pêne de l'invention ;
  • la figure 7 est une vue de dessus du pêne de la figure 6 ;
  • les figures 8 à 11 sont des vues en perspective montrant le montage du pêne dans son boîtier de verrou ;
  • la figure 12 est une vue en perspective de la clé de l'invention utilisée en combinaison avec le verrou de l'invention ;
  • la figure 13 est une vue partielle en perspective de dessus du tampon montrant l'introduction de la clé de la figure 12 au travers d'une ouverture du tampon ;
  • la figure 14 représente le guidage du bras de manoeuvre de la clé vers le boîtier de verrou ;
  • la figure 15 représente une phase de manoeuvre de la clé pour introduire l'extrémité de son bras dans le boîtier de verrou ;
  • la figure 16 représente le bras de manoeuvre de la clé dont l'extrémité est introduite dans le boîtier de verrou ;
  • la figure 17 représente la position de la clé correspondant à celle de la figure 16 ;
  • la figure 18 représente la clé à sa position de déverrouillage du pêne ;
  • la figure 19 représente la position de la partie externe de la clé correspondant à sa position de déverrouillage de la figure 18 ; et
  • la figure 20 est une vue en perspective représentant une cale permettant de n'utiliser que la clé de la figure 12 pour déverrouiller le tampon de son cadre.
The invention will be better understood, and other objects, characteristics, details and advantages thereof will appear more clearly in the explanatory description which will follow with reference to the accompanying drawings given solely by way of example illustrating an embodiment. of the invention and in which:
  • the figure 1 is a perspective view of a buffer mounted hinged to a frame in the open position and provided with a locking and unlocking device according to the invention;
  • the figure 2 is a partial perspective view from above of the entire figure 1 and showing the striker of the frame for locking the pad to this frame;
  • the figure 3 is a top view of the stamp of the figure 1 ;
  • the figure 4 is a bottom view of the buffer of the figure 1 and showing the lock according to the invention;
  • the figure 5 is an enlarged view of the lock of the invention without its bolt;
  • the figure 6 is a perspective view of the bolt of the invention;
  • the figure 7 is a top view of the bolt of the figure 6 ;
  • the Figures 8 to 11 are perspective views showing mounting of the bolt in its lock housing;
  • the figure 12 is a perspective view of the key of the invention used in combination with the lock of the invention;
  • the figure 13 is a partial perspective view from above of the stamp showing the introduction of the key of the figure 12 through an opening of the stamp;
  • the figure 14 represents the guidance of the operating arm of the key to the lock housing;
  • the figure 15 represents a key operating phase for introducing the end of its arm into the lock housing;
  • the figure 16 represents the operating arm of the key whose end is inserted into the lock housing;
  • the figure 17 represents the position of the key corresponding to that of the figure 16 ;
  • the figure 18 represents the key at its unlocking position of the bolt;
  • the figure 19 represents the position of the external part of the key corresponding to its unlocking position of the figure 18 ; and
  • the figure 20 is a perspective view representing a wedge allowing to use only the key of the figure 12 to unlock the pad from its frame.

Le dispositif de verrouillage et de déverrouillage de l'invention est tout particulièrement destiné à équiper un tampon, couvercle ou analogue 1 permettant d'obturer un cadre, châssis ou analogue 2 délimitant l'ouverture d'un regard de chaussée par exemple.The locking and unlocking device of the invention is particularly intended to equip a buffer, lid or the like 1 for closing a frame, frame or the like 2 defining the opening of a manhole for example.

Ce dispositif de verrouillage peut être actionné par une clé 3 qui sera décrite ultérieurement.This locking device can be actuated by a key 3 which will be described later.

Le dispositif de verrouillage comprend un verrou 4 solidaire de la face interne de la paroi supérieure la du tampon 1, la paroi la présentant une ouverture débouchante 5 permettant à la clé 3 d'accéder au verrou 4.The locking device comprises a latch 4 secured to the inner face of the upper wall 1a of the buffer 1, the wall having an opening 5 allowing the key 3 to access the latch 4.

La clé 3 comprend un bras 6 dont une extrémité 7 permet de manoeuvrer le verrou 4 lorsque la clé 3 est introduite dans l'ouverture 5 du tampon 1 d'une position de verrouillage dans laquelle un pêne 8 du verrou 4 est retenu prisonnier d'une gâche 9 du cadre 1 à une position de déverrouillage pour laquelle le pêne 8 est dégagé de la gâche 9.The key 3 comprises an arm 6, one end 7 of which makes it possible to maneuver the latch 4 when the key 3 is inserted into the opening 5 of the buffer 1 in a locking position in which a bolt 8 of the latch 4 is held prisoner of a striker 9 of the frame 1 to an unlocking position for which the bolt 8 is released from the striker 9.

Le tampon 1 est représenté comme étant du type rectangulaire pouvant être logé dans un cadre de forme conjuguée 2, mais il est bien entendu qu'il peut avoir une forme circulaire.The pad 1 is shown as being of the rectangular type that can be housed in a frame of conjugate form 2, but it is understood that it can have a circular shape.

Selon l'invention, le pêne 8 est amoviblement monté et guidé en translation dans un boîtier 10 de verrou 4 venant de fonderie avec le tampon 1 et s'étendant perpendiculairement au côté du tampon 1 opposé à celui comportant la charnière d'articulation 11 du tampon 1 au cadre 2 de manière que la partie active 12 du pêne 8 soit en appui, en position de fermeture du tampon 1 sur le cadre 2, sous la gâche 9 constituée par une nervure solidaire de la face interne du côté du cadre 2 adjacent au boîtier 10.According to the invention, the bolt 8 is removably mounted and guided in translation in a lock casing 4 coming from casting with the pad 1 and extending perpendicularly to the side of the pad 1 opposite to that comprising the hinge hinge 11 of the buffer 1 to the frame 2 so that the active portion 12 of the bolt 8 bears, in the closed position of the buffer 1 on the frame 2, under the striker 9 constituted by a rib integral with the inner face of the side of the adjacent frame 2 to the housing 10.

Le boîtier de verrou 10 présente la forme générale d'un parallélépipède rectangle et le pêne 8 est maintenu à sa position de verrouillage du tampon 1 au cadre 2 par un ressort hélicoïdal de compression 13 monté précontraint entre le pêne 8 et une paroi de fond 14 du boîtier 10 opposée à la partie active 12 du pêne 8.The lock housing 10 has the general shape of a rectangular parallelepiped and the bolt 8 is maintained at its locking position of the buffer 1 to the frame 2 by a helical compression spring 13 mounted prestressed between the bolt 8 and a bottom wall 14 of the housing 10 opposite the active portion 12 of the bolt 8.

Le pêne 8 comprend une partie d'extrémité 15 en forme de T dont la branche extrême 16 s'étend transversalement à la direction longitudinale du pêne 8. Ce dernier comprend en outre deux languettes flexibles 17 situées dans le même plan que la partie 15 en forme de T et qui divergent l'une de l'autre en sens opposé à la branche transversale 16 et, par conséquent, vers la partie active 12 du pêne 8.The bolt 8 comprises a T-shaped end portion 15 whose end branch 16 extends transversely to the longitudinal direction of the bolt 8. The latter further comprises two flexible tongues 17 situated in the same plane as the portion 15 in FIG. T-shape and which diverge from each other in the opposite direction to the transverse branch 16 and, consequently, to the active portion 12 of the bolt 8.

De préférence, le pêne 8 et le ressort de rappel 13 sont réalisés en une seule pièce à partir d'une matière plastique, par exemple à base de polyacétal. La partie active 12, les languettes flexibles 17, la partie 15 en forme de T et le ressort de rappel 13 sont symétriques relativement au plan médian longitudinal du pêne 8.Preferably, the bolt 8 and the return spring 13 are made in one piece from a plastic material, for example based on polyacetal. The active portion 12, the flexible tongues 17, the T-shaped portion 15 and the return spring 13 are symmetrical relative to the longitudinal median plane of the bolt 8.

Les languettes 17 peuvent se rapprocher élastiquement l'une vers l'autre à une position sensiblement parallèle à l'axe longitudinal du pêne 8.The tongues 17 can move elastically toward each other at a position substantially parallel to the longitudinal axis of the bolt 8.

L'utilisation du polyacétal comme matière constituant le pêne 8 est avantageuse en ce qu'elle dispose d'un bon indice de viscosité et, par conséquent, une bonne durée de vie malgré les frottements pouvant se produire entre le pêne 8 et la fonte brute du boîtier 10. Cette matière a également pour avantage qu'elle permet facilement d'intégrer le ressort de compression 13 en arrière du pêne 8.The use of polyacetal as material constituting the bolt 8 is advantageous in that it has a good viscosity index and, therefore, a good life despite the friction that can occur between the bolt 8 and the pig iron This material also has the advantage that it makes it easy to integrate the compression spring 13 behind the bolt 8.

Le boîtier 10 comprend deux rainures 18, dont une seule est clairement visible, formées respectivement dans les deux parois latérales 19 du boîtier 10 perpendiculaires à la paroi supérieure 1a du tampon 1, les deux rainures 18 s'étendant parallèlement à la direction longitudinale du boîtier 10 vers la paroi de fond 14 de celui-ci. Au moins l'une des rainures 18, celle la plus proche de l'ouverture 5 du tampon 1, traverse la paroi latérale correspondante 19 du boîtier 10 et cette paroi comporte une fente 20 perpendiculaire au plan du tampon 1 et débouchant d'une part dans la paroi frontale 21 du boîtier 10 et d'autre part dans la rainure traversante 18 pour permettre l'introduction de l'extrémité 7 du bras 6 de la clé 3 dans la rainure 18 comme on le verra ultérieurement.The housing 10 comprises two grooves 18, only one of which is clearly visible, respectively formed in the two lateral walls 19 of the housing 10 perpendicular to the upper wall 1a of the buffer 1, the two grooves 18 extending parallel to the longitudinal direction of the housing 10 to the bottom wall 14 thereof. At least one of the grooves 18, the one closest to the opening 5 of the buffer 1, through the corresponding side wall 19 of the housing 10 and this wall has a slot 20 perpendicular to the plane of the pad 1 and opening on the one hand in the front wall 21 of the housing 10 and on the other hand in the through groove 18 to allow the introduction of the end 7 of the arm 6 of the key 3 into the groove 18 as will be seen later.

Les deux rainures 18 permettent le guidage respectivement des deux extrémités de la branche transversale 16 du pêne 8 dans le boîtier 10 suivant la direction longitudinale de ce dernier à l'encontre de la force de rappel du ressort 13 lorsque le pêne 8 est déplacé longitudinalement en translation à sa position de déverrouillage du tampon 1 du cadre 2.The two grooves 18 allow the guiding respectively of the two ends of the transverse branch 16 of the bolt 8 in the housing 10 in the longitudinal direction of the latter against the restoring force of the spring 13 when the bolt 8 is moved longitudinally in position. translation to its unlocking position of the buffer 1 of the frame 2.

Le boîtier 10 comprend en outre deux fenêtres rectangulaires 22 réalisées respectivement dans les deux parois latérales 19 de ce boîtier à l'opposé de la paroi 14 et des rainures 18 et s'étendant parallèlement à la direction longitudinale du boîtier 10 sensiblement dans le même plan que les rainures de guidage 18. Les deux fenêtres 22 sont destinées à recevoir par encliquetage les deux languettes flexibles 17 lors du montage du pêne 8 dans le boîtier 10.The housing 10 further comprises two rectangular windows 22 made respectively in the two side walls 19 of this housing opposite the wall 14 and grooves 18 and extending parallel to the longitudinal direction of the housing 10 substantially in the same plane That the guide grooves 18. The two windows 22 are intended to snap-fit the two flexible tongues 17 during assembly of the bolt 8 in the housing 10.

La paroi frontale 21 du boîtier 10 est découpée de manière à former une empreinte de forme conjuguée à la partie 15 en forme de T et au ressort de compression 13 du pêne 8 pour permettre le montage de ce dernier dans ce boîtier.The front wall 21 of the housing 10 is cut in such a way as to form a shape-shaped recess conjugated to the T-shaped portion 15 and to the compression spring 13 of the bolt 8 to allow mounting of the latter in this housing.

Comme cela est mieux visible notamment en figure 8, le pêne 8 comprend un ergot 23 faisant saillie perpendiculairement de la jambe plane de la partie 15 en forme de T du pêne 8 et permettant d'introduire manuellement le pêne 8 par translation dans le boîtier 10 lors du montage de ce pêne. Cet ergot permet également de déverrouiller le pêne de sa gâche de l'intérieur du regard de chaussée.As it is better visible especially in figure 8 , the bolt 8 comprises a lug 23 projecting perpendicularly from the flat leg of the T-shaped portion 15 of the bolt 8 and for manually introducing the bolt 8 by translation in the housing 10 during assembly of the bolt. This lug also makes it possible to unlock the bolt of its keeper from the inside of the manhole.

La clé 3 comprend une poignée 24 parallèle au bras 6 et un barreau 25 perpendiculaire ou incliné à la poignée 24 et reliant cette dernière au bras 6. Le bras 6 et son extrémité 7, la poignée 24 et le barreau de liaison 25 sont situés dans un même plan et formés par déformation d'une barre à section transversale rectangulaire.The key 3 comprises a handle 24 parallel to the arm 6 and a bar 25 perpendicular or inclined to the handle 24 and connecting the latter to the arm 6. The arm 6 and its end 7, the handle 24 and the connecting rod 25 are located in the same plane and formed by deformation of a bar of rectangular cross section.

L'extrémité 7 du bras 6 est reliée à ce dernier par une partie coudée à angle droit de manière que cette extrémité s'étende parallèlement au bras 6 vers la poignée 24 et en sens opposé au barreau 25. La clé 3 présente ainsi une forme générale approximativement en G avec la poignée 24 de longueur supérieure à celle du bras 6 et de son extrémité 7.The end 7 of the arm 6 is connected to the latter by a bent portion at right angles so that this end extends parallel to the arm 6 towards the handle 24 and in the opposite direction to the bar 25. The key 3 thus has a shape generally in G with the handle 24 of greater length than that of the arm 6 and its end 7.

L'ouverture 5 du tampon 1 est constituée par une fente longiligne parallèle au côté du tampon 1 opposé à son articulation 11 au cadre 2 et qui est située dans un plan perpendiculaire à la direction longitudinale du boîtier 10.The opening 5 of the tampon 1 is constituted by an elongate slot parallel to the side of the pad 1 opposite its articulation 11 to the frame 2 and which is located in a plane perpendicular to the longitudinal direction of the casing 10.

La fente 5 a une longueur légèrement supérieure à celle du bras 6 et de son extrémité 7 pour permettre l'introduction du bras 6 et de son extrémité 7 au travers de la fente 5 par déplacement dans son propre plan de la clé 3 perpendiculairement à la paroi supérieure 1a du tampon 1.The slot 5 has a length slightly greater than that of the arm 6 and its end 7 to allow the introduction of the arm 6 and its end 7 through the slot 5 by moving in its own plane of the key 3 perpendicular to the upper wall 1a of the buffer 1.

Le tampon 1 comprend, s'étendant perpendiculairement de sa face interne, deux parois 26 disposées parallèlement à la fente 5 en prolongement de celle-ci et permettant le guidage de l'extrémité 7 du bras 6 vers la rainure traversante 18 de la paroi 19 du boîtier de verrou 10.The buffer 1 comprises, extending perpendicularly from its internal face, two walls 26 arranged parallel to the slot 5 extending from it and allowing the guide of the end 7 of the arm 6 to the through groove 18 of the wall 19 lock housing 10.

Les deux parois de guidage 26 sont reliées l'une à l'autre par une paroi transversale 27 à l'opposé du boîtier 10 et définissent une ouverture située en regard de la rainure 18 et de la fente 20. La paroi de guidage 26, située à l'opposé du bord du tampon 1 destiné à venir en regard du bord du cadre 2 comportant la gâche 9, comporte une paroi 28 qui diverge de l'autre paroi de guidage 26 et permet le pivotement limité de l'extrémité 7 de la clé 3 dans le sens permettant le déplacement en translation du pêne 8 dans le boîtier 10 à sa position de déverrouillage du tampon 1 à l'encontre de la force de rappel du ressort 13.The two guide walls 26 are connected to one another by a transverse wall 27 opposite the housing 10 and define an opening facing the groove 18 and the slot 20. The guide wall 26, located opposite the edge of the buffer 1 intended to come opposite the edge of the frame 2 comprising the striker 9, has a wall 28 which diverges from the other guide wall 26 and allows the limited pivoting of the end 7 of the key 3 in the direction allowing the translational movement of the bolt 8 in the housing 10 at its position of unlocking the buffer 1 against the restoring force of the spring 13.

Une cale 29 est solidaire de la face interne de la paroi supérieure 1a du tampon 1 entre la paroi divergente 28 et la paroi de guidage 26 et est en regard de la rainure traversante 18 et de la fente 20. La cale 29 est conformée de manière à s'adapter dans la partie sensiblement en forme de U définie par le bras 6 entre le barreau 25 et l'extrémité recourbée 7 de la clé 3, lorsque l'extrémité 7 est introduite dans la fente 20 au niveau de la rainure 18. La cale 29 constitue un obstacle à l'introduction d'une simple clé en forme de crochet pour tenter de déverrouiller frauduleusement le pêne 8 de sa gâche 9. Autrement dit, seule la clé 3 de l'invention peut être utilisée, par la présence de la cale 29, pour agir par son extrémité 7 sur le pêne 8 lors du déverrouillage du tampon 1 de son cadre 2.A wedge 29 is secured to the inner face of the upper wall 1a of the buffer 1 between the diverging wall 28 and the guide wall 26 and is opposite the through groove 18 and the slot 20. The wedge 29 is shaped so that to fit into the substantially U-shaped portion defined by the arm 6 between the bar 25 and the curved end 7 of the key 3, when the end 7 is inserted into the slot 20 at the groove 18. The wedge 29 constitutes an obstacle to the introduction of a simple hook-shaped key to try to fraudulently unlock the bolt 8 of its striker 9. In other words, only the key 3 of the invention can be used, by the presence of the wedge 29, to act by its end 7 on the bolt 8 during the unlocking of the buffer 1 of its frame 2.

Selon une variante de réalisation, une seule paroi de guidage 26 peut être prévue, celle ne comportant pas la paroi divergeante 28. Dans ce cas, la cale 29 est solidaire du tampon et de cette paroi unique 26 et l'extrémité 7 de la clé 3 vient en appui au fond de la rainure traversante 18 à la position de la clé correspondant à celle de déverrouillage du pêne 8.According to an alternative embodiment, a single guide wall 26 may be provided, the one not comprising the diverging wall 28. In this case, the wedge 29 is secured to the pad and this single wall 26 and the end 7 of the key 3 bears against the bottom of the through groove 18 at the position of the key corresponding to that of unlocking the bolt 8.

Les figures 8 à 11 représentent le montage du pêne 8 dans le boîtier 10. Comme le montre la figure 8, le pêne 8 est présenté en face de la paroi frontale 21 du boîtier 10 de manière que sa partie active 12 soit en dehors du boîtier 10 et sa partie 15 en forme de T ainsi que son ressort de compression 10 soient en regard de l'empreinte conjuguée réalisée dans la paroi frontale 21 du boîtier 10. Le pêne 8 est alors introduit dans le boîtier 10 au travers de la paroi 21 à la position représentée en figure 9 et le pêne 8 est ensuite déplacé en translation, à l'aide de l'ergot de préhension 23, dans le boîtier 10 comme indiqué par les flèches F1 en figure 9 de manière que les deux languettes flexibles 17 soient élastiquement rapprochées l'une vers l'autre par les deux parties d'extrémité de la paroi latérale 19 opposées à la paroi de fond 14 comme représenté en figure 10 jusqu'à ce qu'elles atteignent les deux fenêtres 22 dans lesquelles elles s'écartent élastiquement l'une de l'autre comme représenté en figure 11. A cette position, les extrémités libres des deux languettes 17 sont en butée, sous l'action de la force de rappel exercée par le ressort 13 en appui sur la paroi de fond 14, sur les bords d'extrémité des fenêtres 22 de manière à maintenir le pêne 8 à sa position de verrouillage du tampon 1 au cadre 2. En outre, le pêne 8 est retenu dans le boîtier 10 non seulement par les deux languettes 17 logées dans leurs fenêtres respectives 22 mais également par la branche transversale 16 du pêne 8 dont les extrémités sont logées dans leurs rainures respectives de guidage 18.The Figures 8 to 11 represent the mounting of the bolt 8 in the housing 10. As shown in FIG. figure 8 , the bolt 8 is presented facing the front wall 21 of the housing 10 so that its active portion 12 is outside the housing 10 and its T-shaped portion 15 and its compression spring 10 are opposite the conjugate fingerprint made in the front wall 21 of the housing 10. The bolt 8 is then introduced into the housing 10 through the wall 21 at the position represented in figure 9 and the bolt 8 is then moved in translation, by means of the gripping pin 23, into the housing 10 as indicated by the arrows F1 in FIG. figure 9 so that the two flexible tongues 17 are elastically brought closer to each other by the two end portions of the side wall 19 opposite to the bottom wall 14 as shown in FIG. figure 10 until they reach the two windows 22 in which they move apart elastically from one another as shown in FIG. figure 11 . At this position, the free ends of the two tabs 17 abut, under the action of the restoring force exerted by the spring 13 bearing on the bottom wall 14, on the end edges of the windows 22 so as to keep the bolt 8 in its locking position of the buffer 1 to the frame 2. In addition, the bolt 8 is retained in the housing 10 not only by the two tabs 17 housed in their respective windows 22 but also by the transverse arm 16 of the bolt 8 whose ends are housed in their respective guide grooves 18.

En variante, le pêne 8 et son ressort de rappel 13 peuvent être montés dans le boîtier 10 en les insérant longitudinalement au travers de l'ouverture débouchante du boîtier 10 opposée à sa paroi de fond 14.Alternatively, the bolt 8 and its return spring 13 can be mounted in the housing 10 by inserting them longitudinally through the opening opening of the housing 10 opposite its bottom wall 14.

Le déverrouillage du tampon 1 de son cadre 2 s'effectue comme suit.The unlocking of the buffer 1 of its frame 2 is as follows.

Comme représenté en figure 13, le bras 6 et son extrémité 7 de la clé 3 sont introduits dans la fente 5 du tampon 1 de manière que le bras 6 et son extrémité 7 arrive à la position représentée en figure 14 à laquelle une portion du barreau 25 de la clé 3 est située entre les deux parois de guidage 26 et à proximité de la paroi transversale 27, l'extrémité 7 se trouvant à un niveau sensiblement supérieur relativement à la cale 29. De la sorte, la clé 3 peut être déplacée de façon guidée par les parois 26 suivant un sens perpendiculaire à la direction longitudinale du boîtier 10 comme indiqué par la flèche F2 en figure 14 de manière que le bras 6 et son extrémité 7 arrivent à la position représentée en figure 15 à laquelle la portion de barreau 25 est en appui sur l'extrémité de la cale 29 opposée au boîtier 10 et la partie en forme de U définie par le bras 6 entre le barreau 25 et l'extrémité recourbée 7 soit en aplomb de la cale 29 pour permettre ensuite, par traction exercée sur la poignée 24 de la clé 3 en sens opposé à la paroi supérieure 1a du tampon 1, d'introduire l'extrémité 7 dans la fente 20 du boîtier 10 comme symbolisé par la flèche F3 en figure 15.As represented in figure 13 , the arm 6 and its end 7 of the key 3 are introduced into the slot 5 of the buffer 1 so that the arm 6 and its end 7 arrives at the position shown in FIG. figure 14 at which a portion of the bar 25 of the key 3 is located between the two guide walls 26 and in the vicinity of the transverse wall 27, the end 7 being at a substantially greater level relative to the wedge 29. In this way, the key 3 can be moved in a guided manner by the walls 26 in a direction perpendicular to the longitudinal direction of the housing 10 as indicated by the arrow F2 in figure 14 so that the arm 6 and its end 7 arrive at the position shown in FIG. figure 15 to which the bar portion 25 bears on the end of the shim 29 opposite the housing 10 and the U-shaped portion defined by the arm 6 between the bar 25 and the curved end 7 is in line with the shim 29 to then allow, by traction on the handle 24 of the key 3 in the opposite direction to the upper wall 1a of the buffer 1, to introduce the end 7 into the slot 20 of the housing 10 as symbolized by the arrow F3 in figure 15 .

Les figures 16 et 17 montrent qu'en faisant pivoter la clé 3 autour du barreau 25 dans le sens indiqué par la flèche F4 (figure 17), le bras 6 et son extrémité 7 pivotent dans le même sens comme symbolisé par la flèche F5 en figure 16 de manière que l'extrémité 7 agisse sur l'extrémité correspondante de la branche transversale 16 du pêne 8 pour déplacer ce dernier en translation rectiligne et guidée dans les rainures 18 du boîtier 10 à l'encontre de la force de rappel du ressort 13 et jusqu'à une position à laquelle la partie active 12 du pêne 8 est dégagée de la gâche 9 du cadre 2. Le pivotement du bras 6 et de son extrémité 7 pour dégager le pêne 8 de la gâche 9 est limité par la paroi divergente 28.The Figures 16 and 17 show that by turning the key 3 around the bar 25 in the direction indicated by the arrow F4 ( figure 17 ), the arm 6 and its end 7 pivot in the same direction as symbolized by the arrow F5 in figure 16 so that the end 7 acts on the corresponding end of the transverse branch 16 of the bolt 8 to move the latter in rectilinear translation and guided in the grooves 18 of the housing 10 against the return force of the spring 13 and to a position at which the active portion 12 of the bolt 8 is released from the striker 9 of the frame 2. The pivoting of the arm 6 and its end 7 to disengage the bolt 8 of the striker 9 is limited by the diverging wall 28 .

Une fois le pêne 8 désengagé de sa gâche 9, le tampon 1 peut être soulevé à l'aide de la poignée 27 de la clé 3 autour de son axe d'articulation 11 au cadre 2 jusqu'à sa position d'ouverture complètement dégagée de ce cadre. En position de déverrouillage du tampon 1, le pêne 8 est ramené à sa position de verrouillage par le ressort de compression 13. La clé 3 peut être utilisée pour ramener le tampon 1 à sa position de fermeture du cadre 2 par basculement autour de l'articulation 11 jusqu'à ce que la partie active 12 du pêne 8 s'engage automatiquement sous la gâche 9 à l'encontre de la force de rappel du ressort 13, mais la clé 3 peut être tout simplement retirée du tampon 1 avant de faire basculer le tampon 1 sous son propre poids à sa position de fermeture verrouillée au cadre 2 par le pêne 8.Once the bolt 8 disengaged from its striker 9, the pad 1 can be lifted using the handle 27 of the key 3 around its hinge axis 11 to the frame 2 to its open position completely cleared of this framework. In unlocked position of the buffer 1, the bolt 8 is returned to its locking position by the compression spring 13. The key 3 can be used to return the buffer 1 to its closed position of the frame 2 by tilting around the articulation 11 until the active part 12 of the bolt 8 engages automatically under the striker 9 against the return force of the spring 13, but the key 3 can be all simply removed from the buffer 1 before tipping the buffer 1 under its own weight to its locked position locked to the frame 2 by the bolt 8.

Comme pour le boîtier 10, les parois de guidage 26 , 28 peuvent venir de fonderie avec le tampon 1.As for the housing 10, the guide walls 26, 28 can come from casting with the buffer 1.

Le pêne 8 peut être retiré de son boîtier 10 en rapprochant l'une de l'autre les deux languettes 17 et sortant le pêne 8 au travers de l'empreinte conjuguée de la paroi frontale 21 du boîtier après avoir déplacé longitudinalement le pêne 8 au regard de cette empreinte. Le cas échéant, le pêne 8 peut être retiré du boîtier 10 en tirant longitudinalement celui-ci hors du boîtier après avoir rapproché l'une de l'autre les deux languettes 17.The bolt 8 can be removed from its housing 10 by bringing the two tongues 17 together and pulling the bolt 8 through the conjugate recess of the front wall 21 of the housing after having moved the bolt 8 longitudinally. look at this footprint. If necessary, the bolt 8 can be removed from the housing 10 by pulling it longitudinally out of the housing after bringing the two tabs 17 close to one another.

Le dispositif de verrouillage et déverrouillage de l'invention est d'une structure extrêmement simple et économique et est particulièrement adapté au verrouillage d'un tampon ou couvercle assurant la sécurité d'un enfant. En effet, du fait qu'un enfant possède une force limitée, la réalisation en une matière plastique du pêne procure à ce pêne une résistance suffisante pour assurer cette sécurité. En outre, la configuration extrêmement simple de la clé 3 en association avec la cale 29 en sortie de la fente d'introduction de la partie active 7 de cette clé empêche l'utilisation de toute autre clé en forme de simple crochet pour déverrouiller frauduleusement le tampon 1 de son cadre 2.The locking and unlocking device of the invention is an extremely simple and economical structure and is particularly suitable for locking a pad or cover ensuring the safety of a child. Indeed, the fact that a child has a limited force, the realization of a plastic bolt provides the bolt resistance sufficient to ensure this security. In addition, the extremely simple configuration of the key 3 in combination with the spacer 29 at the exit of the insertion slot of the active part 7 of this key prevents the use of any other key in the form of a simple hook to fraudulently unlock the key. buffer 1 of its frame 2.

Claims (13)

  1. A device for locking and unlocking a plug or cover (1) on a frame (2) by means of a key (3), comprising a latch (4) integral with the plug (1) having an outlet opening (5) giving access to the latch (4) for the key (3) having an arm (6), one end (7) of which allows for the latch (4), when the key (3) is introduced into the opening (5) of the plug (1), to be operated from a locking position, in which a bolt (8) of the latch (4) is held captive by a keeper (9) of the frame (2), to an unlocking position, for which the bolt (8) is released from the keeper (9), characterized in that the bolt (8) is removably mounted and guided in translation inside a casing (10) of the plug (1), in that it is held in the locking position thereof by a helical compression spring (13) inserted between the bolt (8) and a bottom wall (14) of the casing (10), and having at the end thereof, which is adjacent to the spring (13), a branch (16) transverse to the longitudinal direction of the bolt (8) extending across two guiding grooves (18) respectively formed in two side walls (19) of the casing (10) in parallel to the longitudinal direction of the bolt (8), at least one of the guiding grooves (18) crossing the corresponding side wall (19) of the casing (10) and into which the end (7) of the arm (6) of the key (3) can be introduced, which can act on the corresponding end of the transverse branch (16) of the bolt (8) for moving the latter in translation towards the position thereof, released from the bolt (9), against the return force of the spring (13).
  2. The device according to claim 1, characterized in that the side wall (19) of the casing (10) comprising the through groove (18) further comprises a slot (20) perpendicular to this wall, opening onto the through groove (18) and allowing for the operating end (7) of the arm (6) of the key (3) to be introduced into the groove (18).
  3. The device according to claim 1 or 2, characterized in that the key (3) comprises a handle (24) parallel to the arm (6) at the operating end (7) and a web (25) connecting the handle (24) to the arm (6), in that the handle (24), the web (25), and the arm (6) at the operating end (7) of the key (3) are located in the same plane, and in that the opening (5) of the plug (1) giving access to the latch (4) is a slot extending in a plane perpendicular to the longitudinal direction of the bolt (8) and allowing for introduction of the arm (6) and the operating end (7) thereof by moving the key (3) in its own plane perpendicularly to the plane of the plug (1), with the operating end (7) of the arm (6) of the key (3) being able to be introduced into the through groove (18) of the wall (19) of the latch casing (10) by translation of the arm (6) in parallel to the slot (5) of the plug (1) towards the casing (10) and being able to act on the transverse branch (16) of the bolt (8) in order to move it towards the position thereof released from the keeper (9) by rotating the handle (24) of the key (3) in the corresponding direction around the web (25) of said key.
  4. The device according to claim 3, characterized in that the plug (1) comprises, extending perpendicularly under the latter, at least one wall (26) parallel to the slot (5) as an extension thereof and allowing for the end (7) of the arm (6) of the key (3) to be guided toward the through groove (18) of the wall (19) of the latch casing (4).
  5. The device according to claim 4, characterized in that the plug (1) comprises two guiding walls (26) of the arm (6) of the key (3), and one of which, facing the latch casing (4), comprises a plate (28) diverging from the other guiding wall (26) and allowing for limited rotation of the arm (6) of the key (3) in the direction releasing bolt (8) from the keeper (9), after the operating end (7) of the arm (6) has been introduced into the through groove (18) of the wall (19) of the casing (4).
  6. The device according to any of the preceding claims, characterized in that the free operating end (7) of the arm (6) of the key (3) is bent over so as to extend in parallel to arm (6) towards handle (24), and in the direction opposite the web (25) connecting arm (6) to handle (24).
  7. The device according to claim 6, characterized in that a shim (29) is integral with the plug (1) and at least one wall (26) for guiding the key (3) on the side of the latch casing (4), and is shaped so as to adapt to the substantially U-shaped part defined by arm (6) of key (3) between web (25) and end (7) of said arm, when the operating end (7) of the arm (6) is introduced into the through groove (18) of wall (19) of casing (10).
  8. The device according to any of the preceding claims, characterized in that the bolt (8) comprises two flexible tabs (17) located in the same plane as the transverse branch (16) of the bolt (8) opposite the latter by diverging one from the other in the direction opposite the transverse branch (16), and allowing for the bolt (8) to be maintained in the latch casing (4), when the bolt (8) is mounted into said casing, after the tabs (17) have respectively snapped into two windows (22) formed in the two side walls (19) of the casing (10) opposite the bottom wall (14) thereof and opposite the two guiding grooves (18) of the transverse branch (16) of the bolt (8), with the free ends of the flexible tabs (17) resting, in the locking position of the plug (1) and under the effect of the return force of the spring (13), on the two rims of the windows (22) opposite the guiding grooves (18).
  9. The device according to any of the preceding claims, characterized in that the transverse branch (16) of the bolt (8) is part of a T-shaped end of said bolt.
  10. The device according to any of the preceding claims, characterized in that the bolt (8) is made of plastic material, such as polyacetal, and the return spring (13) is of the same material as the bolt (8).
  11. The device according to claim 10, characterized in that bolt (8) and the return spring (13) thereof are mounted in the casing (10) by being inserted through a conjugate dent of the front wall (21) of the casing (10) and by pushing bolt (8) lengthwise in casing (10) against the return force of spring (13) until the flexible tabs (17) elastically snap into their respective windows (22).
  12. The device according to claim 10, characterized in that bolt (8) and the return spring (13) thereof are mounted in casing (10) by lengthwise insertion through the end opening of casing (10) opposite the bottom wall (14) of casing (10).
  13. The device according to any of the preceding claims, characterized in that the latch casing (4) and the guide walls (26) of the arm (6) of the key (3) are cast with the plug (1).
EP20070290900 2006-07-21 2007-07-18 Locking and unlocking device using a key for a stamp or a cover on a frame, in particular of a manhole cover Not-in-force EP1882779B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0653075A FR2904014B1 (en) 2006-07-21 2006-07-21 DEVICE FOR LOCKING AND UNLOCKING USING A KEY OF A BUFFER OR COVER ON A FRAME, IN PARTICULAR A PAVEMENT LOOK.

Publications (2)

Publication Number Publication Date
EP1882779A1 EP1882779A1 (en) 2008-01-30
EP1882779B1 true EP1882779B1 (en) 2009-07-01

Family

ID=37810290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070290900 Not-in-force EP1882779B1 (en) 2006-07-21 2007-07-18 Locking and unlocking device using a key for a stamp or a cover on a frame, in particular of a manhole cover

Country Status (9)

Country Link
US (1) US20080022731A1 (en)
EP (1) EP1882779B1 (en)
CN (1) CN101109250B (en)
AT (1) ATE435339T1 (en)
CA (1) CA2593966A1 (en)
DE (1) DE602007001421D1 (en)
FR (1) FR2904014B1 (en)
NO (1) NO20073855L (en)
SG (1) SG139681A1 (en)

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Publication number Priority date Publication date Assignee Title
US9157212B2 (en) 2008-05-22 2015-10-13 Mcgard Llc Corrosion-resistant self-locking manhole cover
US8888400B2 (en) 2010-10-07 2014-11-18 Mcgard Llc Corrosion-resistant self-locking manhole cover
FR2956418B1 (en) * 2010-02-18 2012-08-17 Norinco FRAME AND BUFFER LIFT WITH BUILT-IN AND SEAL SEAL
US20110210135A1 (en) * 2010-02-26 2011-09-01 Scott Huff Lockable Lid for Container
US8959859B2 (en) 2012-09-17 2015-02-24 Steelcase Inc. Floor-to-ceiling partition wall assembly
US10329759B2 (en) 2012-09-17 2019-06-25 Steelcase Inc. Floor-to-ceiling partition wall assembly
CN103938654B (en) * 2014-04-10 2016-08-31 北京泰宁科创雨水利用技术股份有限公司 A kind of band safe locking device Anti-loose well lid and well seat
CN106801441A (en) * 2015-11-26 2017-06-06 中国石油天然气股份有限公司 Anti-theft well lid and opening tool for same
CN105416810B (en) * 2015-12-23 2017-05-17 天津市盘石纳新科技股份有限公司 Money storage box provided with safety protection device
CN110916462A (en) * 2019-12-31 2020-03-27 盛纪（上海）家居用品有限公司 Suction nozzle cup cover
CH718074A1 (en) * 2020-11-18 2022-05-31 Renggli Werner Blocking unit for a manhole structure that can be closed with a manhole cover.

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US1884722A (en) * 1931-11-28 1932-10-25 Alexander S Katz Lock
US2608085A (en) * 1947-07-23 1952-08-26 Alfred B Castle Locking device
SE448478B (en) * 1985-02-22 1987-02-23 Gustavsberg Ab DEVICE FOR WELDING THE FURNITURE COVER
FR2646481B1 (en) * 1989-04-28 1991-08-23 Legrand Sa FASTENING DEVICE FOR ARTICLE TO BE FIXED ON ANY SUPPORT, AND ARTICLE, PARTICULARLY A HOUSING, EQUIPPED WITH AT LEAST SUCH A FASTENING DEVICE
CH692707A5 (en) * 1997-11-06 2002-09-30 Werner Nill Safety closure for accessible cover for rain and waste water installations beneath road surface comprises beam located on cover under side, laterally withdrawable from it and secured by lock against axial movement
FR2793502B1 (en) * 1999-05-11 2001-08-17 Norinco MANHOLE WITH LID AND GRID ARTICULATED AND LOCKED
US6471258B1 (en) * 1999-09-21 2002-10-29 Marcelino Bombuy Perich Latching mechanism of an anti-finger catching system
CN2641131Y (en) * 2003-09-02 2004-09-15 王和学 Cover of inspection well
CN2690472Y (en) * 2004-03-16 2005-04-06 王书武 Anti-theft manhole cover and opening tool
CN2769430Y (en) * 2005-02-28 2006-04-05 威海康威通信技术有限公司 Manhole cover electronic puzzle lock clutch washer emergency unlocking device

Also Published As

Publication number Publication date
US20080022731A1 (en) 2008-01-31
ATE435339T1 (en) 2009-07-15
SG139681A1 (en) 2008-02-29
CN101109250B (en) 2012-08-22
DE602007001421D1 (en) 2009-08-13
CN101109250A (en) 2008-01-23
FR2904014B1 (en) 2008-10-10
NO20073855L (en) 2008-01-22
FR2904014A1 (en) 2008-01-25
CA2593966A1 (en) 2008-01-21
EP1882779A1 (en) 2008-01-30

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