EP0329535B1 - Pivotable mezzanine safety gate - Google Patents

Pivotable mezzanine safety gate Download PDF

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Publication number
EP0329535B1
EP0329535B1 EP89400377A EP89400377A EP0329535B1 EP 0329535 B1 EP0329535 B1 EP 0329535B1 EP 89400377 A EP89400377 A EP 89400377A EP 89400377 A EP89400377 A EP 89400377A EP 0329535 B1 EP0329535 B1 EP 0329535B1
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EP
European Patent Office
Prior art keywords
gate
lever
levers
pivoting
articulated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89400377A
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German (de)
French (fr)
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EP0329535A1 (en
Inventor
Michel Roux
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SARL PREVENTION INDUSTRIELLE MANUTENTION ENGINEERING PIME
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SARL PREVENTION INDUSTRIELLE MANUTENTION ENGINEERING PIME
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Priority to AT89400377T priority Critical patent/ATE63363T1/en
Publication of EP0329535A1 publication Critical patent/EP0329535A1/en
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Publication of EP0329535B1 publication Critical patent/EP0329535B1/en
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B11/00—Means for allowing passage through fences, barriers or the like, e.g. stiles

Definitions

  • the present invention relates to a tilting safety barrier for a platform.
  • Such protective barriers constituting an entrance to a platform, for example of which access is provided by a hoist or a handling machine such as a forklift. This barrier is closed towards the vacuum in which the freight elevator is mounted and it must be open when you want to access from the outside on the platform or from the inside on the freight elevator.
  • a known lock barrier consists of a frame mounted at the edge of a platform, comprising two doors, namely an external door on the vacuum side and an internal door on the inside of the platform.
  • Such a sluice barrier has the disadvantage that in the closed position of the passage leading to the void by the external gate, the latter can tilt, under the action of a horizontal force, towards the void and personnel risks fall into the void thus made accessible and suffer a serious accident.
  • the object of the present invention is to overcome this drawback of the fact that it comprises means for locking the external gate in the closed position of the passage leading to the vacuum, opposing any tilting under the effect of a horizontal force exerted. on the external door in the direction of the vacuum and unlocked automatically by a pull exerted downwards on the internal door in the high and horizontal position.
  • the lock barrier according to the invention can only give access to a vacuum when an internal door is exerted a pulling force down in order to close by this gate access to the barrier.
  • the tilting safety safety barrier according to the invention is illustrated in the drawing figures in strong lines in the closed position and in broken and thin lines in the open position.
  • the barrier is made up essentially of an armature 1 pivotally mounted around a horizontal axis and extending parallel to the edge 3 of a platform 4.
  • This frame which is advantageously produced by means of tubes or bars assembled together by bolting or welding, comprises two doors, namely an external door 5 on the vacuum side where a freight elevator is installed, for example, not shown in the drawing. , and an internal door 6, on the side of the interior of the platform 4, also produced by tubes or bars.
  • the lock barrier constitutes an entrance to the platform 4, defined by a free passage in the railing which generally borders the platform.
  • the external gate 5 In the closed position of the barrier, shown in strong lines in FIG. 1 of the drawing, the external gate 5 is in a vertical position and resting on the ground of the platform 4, practically in line with the edge 3 of this plate. -form.
  • the internal gate 6 is in a high position and horizontal, at a height sufficient to allow the free movement of operators carrying the load to be transferred to or from the freight elevator.
  • the barrier is closed as a safety measure for the personnel working on platform 4.
  • the lock barrier In order to free access to the freight elevator, the lock barrier must be brought back to the open position, which is done by doing rotate the internal gate 6 approximately 90 ° clockwise and bring it to the position illustrated in FIG. 1 in mixed and thin lines, that is to say vertically and resting on the floor of the platform 4.
  • the external gate 5 must then be, also as shown in phantom and fine lines in FIG. 1, in a horizontal position and at the height sufficient to be able to place on the platform 4 a palletized load.
  • This set of levers 7 comprises a first lever 8 which extends vertically upwards and which is integral with the external door 5, at its upper end, when this door is vertical. In this position the opposite lower part is supported on the floor of the platform 4, by means of an elastic stop E.
  • the external gate 5 is also rigidly secured to a second lever 14, extending horizontally towards the inside of the platform, consolidated by a spacer 15 and fixed to the external gate 5 by one of its end parts.
  • This lever 14 is articulated, at its end opposite to that which is fixed to the external gate 5, around a fixed point of articulation A. Due to this articulation A, the external gate 5 can only rotate around this point materializing a horizontal axis of rotation.
  • the set of levers 7 also includes a control lever 9 secured to the internal door 6 and consolidated by a spacer 10.
  • This control lever 9 which is inclined from bottom to top towards the inside of the platform in the closed position, is secured, near its end opposite the internal gate 6, of a rotation lever 11 extending downward, square with the control lever 9, therefore inclined up and down inward and consolidated by two spacers 12, on either side of the rotation lever.
  • This rotation lever 11 is articulated, at its lower end at a point B located slightly lower and inward relative to the point of articulation A.
  • the set of levers 7 then comprises a connecting rod 13, one end C of which is articulated on the upper end of the first lever 8 while the other end D of the connecting rod 13 is articulated on the end, opposite the gate internal 6, of the control lever 9.
  • the set of levers 7 constitutes, owing to the connecting rod 13, the connecting means, doubly articulated in C and D, between the external door 5 and the internal door 6. Because the rotation lever 11 is articulated by its lower end part, on the fixed axis B, the internal gate 6 and the control lever 9 can only rotate around this axis B.
  • control lever 9 is rigidly secured to a bent arm 16 close to the point of articulation D.
  • This bent arm 16 extends above the control lever 9 and in the direction of the connecting rod 13 and it leads to its end a stop 17 preferably elastic. This stop 17 comes to bear on the connecting rod 13, when the internal door 6 is raised in its high position.
  • the levers of the set of levers 7 are of a length such that, when the internal gate 6 is raised to its highest position and distant from the ground of the platform 4, the connecting rod 13 pushes the first lever 8 and with it the external gate 5 which tilts and comes to occupy its vertical position for closing the barrier-lock.
  • the points of articulation B, C, D form a triangle whose apex D is above the line BC which joins the points of articulation B and C ( Figure 4).
  • An upward force exerted on the internal door 6 causes the articulation point D to slightly lower as a result of the pressure of the bent arm 16 on the connecting rod 13 and the external door 5 is then rigidly fixed in place vertically, in the closed position by crushing the elastic stop E (FIGS. 1 and 2).
  • the connecting means between the external door 5 and the internal door 6 are constituted by three pivoting levers 21, 22, 23 articulated around longitudinal axes located in the same vertical plane.
  • Each of these levers is integral, in its middle, with a rotation lever 24, 25, 26, these rotation levers being longer and longer from the lowest lever 24 towards the highest lever 26.
  • the rotation levers 24, 25, 26 are connected to the tilting levers 21, 22, 23 by one of their ends, they are perpendicular to the respective tilting levers, and their other ends are articulated around respective fixed axes 27, 28, 29, aligned vertically.
  • each of the gates 5, 6 can be constituted by a flexible barrier connected to the ends of the tilting levers, this barrier being able to be formed, for example, of chains.
  • the tilting of the highest lever 23 around the respective fixed axis 29 is limited upwards on one side by a stop 36 and on the other side by a second stop 37.
  • the balancing of the tilting levers 21, 22, 23 around the fixed axes 27, 28, 29 is such that normally the sliding joints 30, 31, 32 on the external door 5 are placed lower and therefore this external door, carrying these sliding joints 30, 31, 32, is in the closed position, vertically.
  • the tilting levers 21, 22, 23 are deployed as a fan, with the sliding joints 33, 34, 35 carried by the internal door 6, placed in the high position, aligned and close to each other horizontally. close on upper lever 23 bears against the stop 36.
  • the lower lever 21 bears, by its lower end, on an elastic stop E disposed on the edge 3 of the platform 4.
  • the internal door 6 is, of this done in the open position, as described for the previous embodiment.
  • a third embodiment of the invention comprising the same means of connection between the external door 5 and the internal door 6, is provided, as shown in FIG. 7, with means for locking the external door 5 in the position of different from the previous embodiment.
  • These locking means are constituted by a first articulated rod 41, at its two ends, on the one hand on the external end of the lower rocker lever 21, at 41a, and on the other hand on the upper rocker lever 23, at 41b , at the end of this lever, on the side of these rocking levers linked to the external door 5.
  • These locking means then comprise a second connecting rod 42 articulated, at its two ends, on the one hand on the internal end of the rocking lever upper 23, at 42a, and on the other hand on the intermediate rocking lever, at 42b, as well as a third connecting rod 43, articulated, at its two ends, on the one hand on the internal end of the intermediate rocking lever 22, at 43a, and on the other hand on the lower tilting lever 21, at 43b.
  • the set of second and third connecting rods 42, 43 is placed on the side of the rocking levers close to the internal door 6.
  • the bottom rocking lever 21 is made in two parts 21a and 21b in extension of one another, joined at their ends joined by an elastic link 44 forming a shock absorber, which is arranged below the upper part 21b, between the latter and a support 45 secured to the lower part 21a.
  • the upper part 21b pivoting downwards in a clockwise direction, in turn drives in this same direction the intermediate lever 22 to which the third connecting rod 33 is connected to its upper end constituting the articulation 44a.
  • the line of action X of the second connecting rod 42 passes below the axis of rotation 28 of the intermediate lever 22 and from this moment the upper tilting lever 23 is rotated in the clockwise around its axis 29.
  • the external gate 5 is then unlocked and it can pass into the open position.
  • a device according to the invention is preferably placed on each lateral side of the barrier-lock.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Gates (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Emergency Lowering Means (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Ladders (AREA)

Abstract

This gate is characterised in that it comprises means (7, 9, 11, 13) of locking the outer gate (5) in the position closing the passage overlooking the open space, opposing any swinging under the effect of a horizontal force applied to the outer gate (5) in the direction of the open space and automatically locking by traction applied towards the bottom applied on the inner gate (6) in the top position. <IMAGE>

Description

La présente invention concerne une barrière-écluse basculante de sécurité pour plate-forme.The present invention relates to a tilting safety barrier for a platform.

On connaît déjà de telles barrières de protection constituant une entrée sur une plate-forme, par exemple dont l'accès est assuré par un monte-charge ou un engin de manutention tel qu'un chariot élévateur. Cette barrière est fermée vers le vide dans lequel est monté le monte-charge et elle doit être ouverte lorsqu'on veut accéder de l'extérieur sur la plate-forme ou de l'intérieur sur le monte-charge. Une telle barrière-écluse connue est constituée d'une armature montée au bord d'une plate-forme, comportant deux portillons, à savoir un portillon externe du côté du vide et un portillon interne du côté de l'intérieur de la plate-forme, reliés entre eux par des moyens de liaison de sorte que, en position de fermeture du passage donnant sur le vide le portillon externe se trouve en position verticale et en appui sur le sol de la plate-forme, le portillon interne se trouvant en position haute et qu'en position d'ouverture du passage, le portillon interne soit amené en position verticale et en appui sur le sol de la plate-forme tandis que le portillon externe se trouve en position haute, le passage entre ces deux positions de chacun des portillons étant réalisé automatiquement (voir FR.A.2 601 659 par exemple).There are already known such protective barriers constituting an entrance to a platform, for example of which access is provided by a hoist or a handling machine such as a forklift. This barrier is closed towards the vacuum in which the freight elevator is mounted and it must be open when you want to access from the outside on the platform or from the inside on the freight elevator. Such a known lock barrier consists of a frame mounted at the edge of a platform, comprising two doors, namely an external door on the vacuum side and an internal door on the inside of the platform. , connected together by connecting means so that, in the closed position of the passage leading to the void, the external gate is in a vertical position and resting on the floor of the platform, the internal gate being in position high and in the open position of the passage, the internal gate is brought to the vertical position and resting on the floor of the platform while the external gate is in the high position, the passage between these two positions of each gates being produced automatically (see FR.A.2 601 659 for example).

Une telle barrière-écluse présente l'inconvénient qu'en position de fermeture du passage donnant sur le vide par le portillon externe, celui-ci peut basculer, sous l'action d'un effort horizontal, en direction du vide et le personnel risque de tomber dans le vide ainsi rendu accessible et subir un grave accident.Such a sluice barrier has the disadvantage that in the closed position of the passage leading to the void by the external gate, the latter can tilt, under the action of a horizontal force, towards the void and personnel risks fall into the void thus made accessible and suffer a serious accident.

La présente invention a pour but de pallier cet inconvénient du fait qu'elle comporte des moyens de verrouillage du portillon externe en position de fermeture du passage donnant sur le vide, s'opposant à tout basculement sous l'effet d'un effort horizontal exercé sur le portillon externe en direction du vide et se débloquant automatiquement par une traction exercée vers le bas sur le portillon interne en position haute et à l'horizontale.The object of the present invention is to overcome this drawback of the fact that it comprises means for locking the external gate in the closed position of the passage leading to the vacuum, opposing any tilting under the effect of a horizontal force exerted. on the external door in the direction of the vacuum and unlocked automatically by a pull exerted downwards on the internal door in the high and horizontal position.

De la sorte, le risque d'un accident à l'approche du personnel travaillant sur la plate-forme est totalement écarté car la barrière-écluse suivant l'invention ne peut donner accès au vide que lorsqu'on exerce sur le portillon interne un effort de traction vers le bas afin de fermer par ce portillon l'accès à la barrière-écluse.In this way, the risk of an accident when approaching personnel working on the platform is completely eliminated because the lock barrier according to the invention can only give access to a vacuum when an internal door is exerted a pulling force down in order to close by this gate access to the barrier.

On décrira ci-après, à titre d'exemples non limitatifs, diverses formes d'exécution de la présente invention, en référence au dessin annexé sur lequel:

  • La figure 1 est une vue en élévation schématique d'une barrière-écluse de l'invention selon une première forme d'exécution, le portillon externe étant en position de fermeture verrouillée.
  • La figure 2 est une vue partielle, à plus grande échelle, de l'ensemble du jeu de leviers constituant les moyens de liaison entre les portillons externe et interne de la barrière-écluse selon la forme d'exécution de la figure 1, le portillon externe étant en position de fermeture verrouillée.
  • Les figures 3 et 4 sont des vues respectivement semblables à celles des figures 1 et 2 au cours du mouvement de déverrouillage du portillon externe.
  • La figure 5 est une vue en élévation schématique de la barrière-écluse de l'invention selon une deuxième forme d'exécution.
  • La figure 6 est une vue partielle, à plus grande échelle, du jeu de leviers du côté du portillon interne, montrant les moyens de verrouillage du portillon externe de la barrière-écluse selon la figure 5.
  • La figure 7 est une vue en élévation schématique du jeu de leviers constituant les moyens de liaison entre les deux portillons, externe et interne, pourvus des moyens de verrouillage du portillon externe de la barrière-écluse de l'invention, selon une troisième forme d'exécution.
Various embodiments of the present invention will be described below, by way of non-limiting examples, with reference to the appended drawing in which:
  • Figure 1 is a schematic elevational view of a lock barrier of the invention according to a first embodiment, the external gate being in the locked closed position.
  • Figure 2 is a partial view, on a larger scale, of the set of levers constituting the connecting means between the external and internal gates of the barrier barrier according to the embodiment of Figure 1, the gate external being in the locked closed position.
  • Figures 3 and 4 are views respectively similar to those of Figures 1 and 2 during the unlocking movement of the external gate.
  • Figure 5 is a schematic elevational view of the barrier barrier of the invention according to a second embodiment.
  • FIG. 6 is a partial view, on a larger scale, of the set of levers on the side of the internal gate, showing the means for locking the external gate of the barrier lock according to FIG. 5.
  • Figure 7 is a schematic elevational view of the set of levers constituting the connecting means between the two doors, external and internal, provided with means for locking the external door of the barrier barrier of the invention, according to a third form d 'execution.

La barrière-écluse basculante de sécurité selon l'invention est illustrée sur les figures du dessin en traits forts en position de fermeture et en traits mixtes et fins en position d'ouverture. La barrière est constituée essentiellement d'une armature 1 montée basculante autour d'un axe horizontal et s'étendant parallèlement au bord 3 d'une plate-forme 4.The tilting safety safety barrier according to the invention is illustrated in the drawing figures in strong lines in the closed position and in broken and thin lines in the open position. The barrier is made up essentially of an armature 1 pivotally mounted around a horizontal axis and extending parallel to the edge 3 of a platform 4.

Cette armature qui est avantageusement réalisée au moyen de tubes ou barres assemblés entre eux par boulonnage ou soudage, comporte deux portillons, à savoir un portillon externe 5 du côté du vide où est installé un monte-charge, par exemple, non figuré sur le dessin, et un portillon interne 6, du côté de l'intérieur de la plate-forme 4, également réalisé par des tubes ou barres.This frame, which is advantageously produced by means of tubes or bars assembled together by bolting or welding, comprises two doors, namely an external door 5 on the vacuum side where a freight elevator is installed, for example, not shown in the drawing. , and an internal door 6, on the side of the interior of the platform 4, also produced by tubes or bars.

La barrière-écluse constitue une entrée sur la plate-forme 4, définie par un passage libre dans le garde-fou qui borde généralement la plate-forme.The lock barrier constitutes an entrance to the platform 4, defined by a free passage in the railing which generally borders the platform.

En position de fermeture de la barrière, représentée en traits forts sur la figure 1 du dessin, le portillon externe 5 se trouve en position verticale et en appui sur le sol de la plate-forme 4, pratiquement au droit du bord 3 de cette plate-forme. Le portillon interne 6 est lui dans une position haute et à l'horizontale, à une hauteur suffisante pour permettre la libre circulation des opérateurs portant la charge à transférer vers ou à partir du monte-charge.In the closed position of the barrier, shown in strong lines in FIG. 1 of the drawing, the external gate 5 is in a vertical position and resting on the ground of the platform 4, practically in line with the edge 3 of this plate. -form. The internal gate 6 is in a high position and horizontal, at a height sufficient to allow the free movement of operators carrying the load to be transferred to or from the freight elevator.

Normalement, la barrière est fermée par mesure de sécurité pour le personnel travaillant sur la plate-forme 4. Afin de libérer l'accès au monte-charge, la barrière-écluse doit être ramenée en position d'ouverture ce qui est réalisé en faisant pivoter le portillon interne 6 d'environ 90° dans le sens des aiguilles d'une montre et l'amener dans la position illustrée sur la figure 1 en traits mixtes et fins, c'est-à-dire à la verticale et reposant sur le sol de la plate-forme 4. Le portillon externe 5 doit se trouver alors, également tel que montré en traits mixtes et fins sur la figure 1, en position horizontale et à la hauteur suffisante pour pouvoir placer sur la plate-forme 4 une charge palettisée. Ce mouvement réciproque des deux portillons, se répétant en sens inverse lorsque le personnel veut avancer sur la plate-forme 4 et ramener la barrière-écluse en position de fermeture par mesure de sécurité, est réalisé automatiquement du fait que les deux portillons 5 et 6 sont reliés entre eux par un jeu de leviers 7. Ce jeu de leviers 7 comprend un premier levier 8 qui s'étend verticalement vers le haut et qui est solidaire du portillon externe 5, à sa partie extrême supérieure, lorsque ce portillon est à la verticale. Dans cette position la partie inférieure opposée est en appui sur le sol de la plate-forme 4, par l'intermédiaire d'une butée élastique E. Le portillon externe 5 est également rigidement solidaire d'un second levier 14, s'étendant horizontalement vers l'intérieur de la plate-forme, consolidé par une entretoise 15 et fixé au portillon externe 5 par l'une de ses parties extrêmes. Ce levier 14 est articulé, à sa partie extrême opposée à celle qui est fixée au portillon externe 5, autour d'un point fixe d'articulation A. Du fait de cette articulation A, le portillon externe 5 ne peut effectuer qu'une rotation autour de ce point matérialisant un axe de rotation horizontal.Normally, the barrier is closed as a safety measure for the personnel working on platform 4. In order to free access to the freight elevator, the lock barrier must be brought back to the open position, which is done by doing rotate the internal gate 6 approximately 90 ° clockwise and bring it to the position illustrated in FIG. 1 in mixed and thin lines, that is to say vertically and resting on the floor of the platform 4. The external gate 5 must then be, also as shown in phantom and fine lines in FIG. 1, in a horizontal position and at the height sufficient to be able to place on the platform 4 a palletized load. This reciprocal movement of the two gates, repeating in the opposite direction when the personnel wants to advance on the platform 4 and bring the barrier back to the closed position for safety reasons, is carried out automatically because the two gates 5 and 6 are related between them by a set of levers 7. This set of levers 7 comprises a first lever 8 which extends vertically upwards and which is integral with the external door 5, at its upper end, when this door is vertical. In this position the opposite lower part is supported on the floor of the platform 4, by means of an elastic stop E. The external gate 5 is also rigidly secured to a second lever 14, extending horizontally towards the inside of the platform, consolidated by a spacer 15 and fixed to the external gate 5 by one of its end parts. This lever 14 is articulated, at its end opposite to that which is fixed to the external gate 5, around a fixed point of articulation A. Due to this articulation A, the external gate 5 can only rotate around this point materializing a horizontal axis of rotation.

Le jeu de leviers 7 comprend également un levier de commande 9 solidaire du portillon interne 6 et consolidé par une entretoise 10. Ce levier de commande 9 qui est incliné de bas en haut vers l'intérieur de la plate-forme en position de fermeture, est solidaire, près de sa partie extrême opposée au portillon interne 6, d'un levier de rotation 11 s'étendant vers le bas, d'équerre avec le levier de commande 9, donc incliné de haut en bas vers l'intérieur et consolidé par deux entretoises 12, de part et d'autre du levier de rotation. Ce levier de rotation 11 est articulé, à son extrémité inférieure en un point B situé en peu plus bas et vers l'intérieur par rapport au point d'articulation A.The set of levers 7 also includes a control lever 9 secured to the internal door 6 and consolidated by a spacer 10. This control lever 9 which is inclined from bottom to top towards the inside of the platform in the closed position, is secured, near its end opposite the internal gate 6, of a rotation lever 11 extending downward, square with the control lever 9, therefore inclined up and down inward and consolidated by two spacers 12, on either side of the rotation lever. This rotation lever 11 is articulated, at its lower end at a point B located slightly lower and inward relative to the point of articulation A.

Le jeu de leviers 7 comprend ensuite une bielle 13, dont une extrémité C est articulée sur l'extrémité supérieure du premier levier 8 tandis que l'autre extrémité D de la bielle 13 est articulée sur l'extrémité, à l'opposé du portillon interne 6, du levier de commande 9. Le jeu de leviers 7 constitue, du fait de la bielle 13, les moyens de liaison, doublement articulée en C et D, entre le portillon externe 5 et le portillon interne 6. Du fait que le levier de rotation 11 est articulé, par sa partie extrême inférieure, sur l'axe fixe B, le portillon interne 6 et le levier de commande 9 ne peuvent effectuer qu'une rotation autour de cet axe B.The set of levers 7 then comprises a connecting rod 13, one end C of which is articulated on the upper end of the first lever 8 while the other end D of the connecting rod 13 is articulated on the end, opposite the gate internal 6, of the control lever 9. The set of levers 7 constitutes, owing to the connecting rod 13, the connecting means, doubly articulated in C and D, between the external door 5 and the internal door 6. Because the rotation lever 11 is articulated by its lower end part, on the fixed axis B, the internal gate 6 and the control lever 9 can only rotate around this axis B.

Par ailleurs le levier de commande 9 est rigidement solidaire d'un bras coudé 16 proche du point d'articulation D. Ce bras coudé 16 s'étend au-dessus du levier de commande 9 et en direction de la bielle 13 et il porte à son extrémité une butée 17 de préférence élastique. Cette butée 17 vient en appui sur la bielle 13, lorsque le portillon interne 6 est soulevé dans sa position haute.Furthermore, the control lever 9 is rigidly secured to a bent arm 16 close to the point of articulation D. This bent arm 16 extends above the control lever 9 and in the direction of the connecting rod 13 and it leads to its end a stop 17 preferably elastic. This stop 17 comes to bear on the connecting rod 13, when the internal door 6 is raised in its high position.

Selon l'invention les leviers du jeu de leviers 7 sont d'une longueur telle que, lorsque le portillon interne 6 est soulevé vers sa position la plus haute et éloignée du sol de la plate-forme 4, la bielle 13 pousse le premier levier 8 et avec lui le portillon externe 5 qui bascule et vient occuper sa position verticale de fermeture de la barrière-écluse. Les points d'articulation B, C, D forment un triangle dont le sommet D est au-dessus de la ligne BC qui réunit les points d'articulation B et C (figure 4). Un effort exercé vers le haut sur le portillon interne 6 fait s'abaisser légèrement le point d'articulation D par suite de la pression du bras coudé 16 sur la bielle 13 et le portillon externe 5 est alors rigidement fixé en place à la verticale, en position fermée en écrasant la butée élastique E (figure 1 et 2). Quel que soit l'effort que l'on puisse exercer ensuite sur le portillon externe 5, horizontalement, en direction du vide il est impossible de faire basculer le portillon externe 5 et d'ouvrir la barrière-écluse dans ce sens. Le portillon externe 5 est en effet verrouillé dans cette position fermée, le bras coudé 16 constituant les moyens de verrouillage du portillon 5 dans cette position.According to the invention the levers of the set of levers 7 are of a length such that, when the internal gate 6 is raised to its highest position and distant from the ground of the platform 4, the connecting rod 13 pushes the first lever 8 and with it the external gate 5 which tilts and comes to occupy its vertical position for closing the barrier-lock. The points of articulation B, C, D form a triangle whose apex D is above the line BC which joins the points of articulation B and C (Figure 4). An upward force exerted on the internal door 6 causes the articulation point D to slightly lower as a result of the pressure of the bent arm 16 on the connecting rod 13 and the external door 5 is then rigidly fixed in place vertically, in the closed position by crushing the elastic stop E (FIGS. 1 and 2). Whatever the effort that can then be exerted on the external door 5, horizontally, in the direction of the vacuum, it is impossible to tilt the external door 5 and to open the lock gate in this direction. The external door 5 is indeed locked in this closed position, the bent arm 16 constituting the means for locking the door 5 in this position.

Lors d'une traction exercée vers le bas (flèche F2 sur la figure 3) sur le portillon interne 6 en position horizontale haute, le point d'articulation D est tiré vers le haut. Le levier de commande 9 bascule de sorte que le bras coudé 16 s'écarte de la bielle 13 (figure 4), qui est de ce fait déverrouillée. Le portillon interne 5 est alors débloqué automatiquement et il peut basculer vers sa position d'ouverture, en étant entraîné pa la bielle 13 qui suit le mouvement du portillon interne 6.During a pull exerted downwards (arrow F2 in FIG. 3) on the internal door 6 in the horizontal high position, the articulation point D is pulled upwards. The control lever 9 rocks so that the bent arm 16 moves away from the connecting rod 13 (FIG. 4), which is therefore unlocked. The internal gate 5 is then automatically unlocked and it can switch to its open position, being driven by the connecting rod 13 which follows the movement of the internal door 6.

Selon une deuxième forme d'exécution préférée mais nullement limitative de cette invention montrée sur les figures 5 et 6 du dessin, les moyens de liaison entre le portillon externe 5 et le portillon interne 6 sont constitués par trois leviers basculants 21, 22, 23 articulés autour d'axes longitudinaux situés dans un même plan vertical. Chacun de ces leviers est solidaire, en son milieu, d'un levier de rotation 24, 25, 26, ces leviers de rotation étant de plus en plus long à partir du levier le plus bas 24 vers le levier le plus haut 26. Les leviers de rotation 24, 25, 26 sont reliés aux leviers basculants 21, 22, 23 par l'une de leurs extrémités, ils sont perpendiculaires aux leviers basculants respectifs, et leurs autres extrémités sont articulées autour d'axes fixes respectifs 27, 28, 29, alignés verticalement. Les leviers basculants 21, 22, 23 sont articulés, à chacune de leurs extrémités, par des articulations coulissantes 30, 31, 32, et 33, 34, 35, d'un côté au portillon externe 5 et de l'autre côté au portillon interne 6. Suivant une variante chacun des portillons 5, 6 peut être constitué par un barrage souple relié aux extrémités des leviers basculants, ce barrage pouvant être formé, par exemple, de chaînes. Le basculement du levier le plus haut 23 autour de l'axe fixe 29 respectif est limité vers le haut d'un côté par une butée 36 et de l'autre côté par une seconde butée 37.According to a second preferred but in no way limiting embodiment of this invention shown in FIGS. 5 and 6 of the drawing, the connecting means between the external door 5 and the internal door 6 are constituted by three pivoting levers 21, 22, 23 articulated around longitudinal axes located in the same vertical plane. Each of these levers is integral, in its middle, with a rotation lever 24, 25, 26, these rotation levers being longer and longer from the lowest lever 24 towards the highest lever 26. The rotation levers 24, 25, 26 are connected to the tilting levers 21, 22, 23 by one of their ends, they are perpendicular to the respective tilting levers, and their other ends are articulated around respective fixed axes 27, 28, 29, aligned vertically. The tilting levers 21, 22, 23 are articulated, at each of their ends, by sliding joints 30, 31, 32, and 33, 34, 35, on one side to the external door 5 and on the other side to the door internal 6. According to a variant each of the gates 5, 6 can be constituted by a flexible barrier connected to the ends of the tilting levers, this barrier being able to be formed, for example, of chains. The tilting of the highest lever 23 around the respective fixed axis 29 is limited upwards on one side by a stop 36 and on the other side by a second stop 37.

L'équilibrage des leviers basculants 21, 22, 23 autour des axes fixes 27, 28, 29 est tel que normalement les articulations coulissantes 30, 31, 32 sur le portillon externe 5 sont placées plus bas et de ce fait ce portillon externe, portant ces articulations coulissantes 30, 31, 32, est en position fermée, à la verticale. Les leviers basculants 21, 22, 23 sont déployés en éventail, avec les articulations coulissantes 33, 34, 35 portées par le portillon interne 6, placées en position haute, alignées et proches les unes des autres à l'horizontale.Dans cette position de fermeture le levier supérieur 23 est en appui contre la butée 36. Par ailleurs le levier inférieur 21 est en appui, par son extrémité inférieure, sur une butée élastique E disposée sur le bord 3 de la plate-forme 4. Le portillon interne 6 est, de ce fait en position d'ouverture, ainsi que décrit pour la forme d'exécution précédente. Une traction vers le bas sur le portillon interne 6 fait basculer les leviers basculants 21, 22, 23 autour des axes 27, 28, 29 avec les articulations coulissantes 33, 34, 35 vers le bas. Les leviers basculants 21, 22, 23 se déployent en éventail en sens inverse, ainsi que montré en traits mixtes sur la figure 3, et le portillon interne 6 vient se placer à la verticale, en position fermée. Par contre les articulations 30, 31, 32 montent à leur position haute et à proximité les unes des autres, à l'horizontale, donc le portillon externe 5 vient occuper sa position d'ouverture, le levier basculant 23 se trouvant en appui contre la seconde butée 37.The balancing of the tilting levers 21, 22, 23 around the fixed axes 27, 28, 29 is such that normally the sliding joints 30, 31, 32 on the external door 5 are placed lower and therefore this external door, carrying these sliding joints 30, 31, 32, is in the closed position, vertically. The tilting levers 21, 22, 23 are deployed as a fan, with the sliding joints 33, 34, 35 carried by the internal door 6, placed in the high position, aligned and close to each other horizontally. close on upper lever 23 bears against the stop 36. Furthermore, the lower lever 21 bears, by its lower end, on an elastic stop E disposed on the edge 3 of the platform 4. The internal door 6 is, of this done in the open position, as described for the previous embodiment. Pulling down on the internal door 6 causes the tilting levers 21, 22, 23 to pivot about the axes 27, 28, 29 with the sliding joints 33, 34, 35 down. The tilting levers 21, 22, 23 are deployed as a fan in the opposite direction, as shown in phantom in Figure 3, and the internal door 6 is placed vertically, in the closed position. Against the joints 30, 31, 32 rise to their high position and close to each other, horizontally, so the outer door 5 comes to occupy its open position, the rocking lever 23 being pressed against the second stop 37.

Lorsque le portillon interne 6 est en position hautes, les extrémités des leviers basculants 21, 22, 23 portant les articulations coulissantes 33, 34, 35, le long du portillon interne 6, viennent en contact ou à proximité immédiate les unes des autres. Les leviers basculants 21 et 22, les plus bas, sont pourvus respectivement, sur leurs faces voisines, de crochets 38, 39 dirigés en sens inverse l'un de l'autre (figure 4). Ces deux crochets 38, 39 constituent les moyens de verrouillage du portillon externe 5 en position fermée. Un effort exercé vers le haut sur le portillon interne 6, à la fin de sa course vers le haut, fait venir en contact et s'accrocher les crochets 38, 39 entre eux, au point 0 sur la figure 4. Dans cette position un effort exercé vers le haut sur le portillon 6 en position haute ou sur le levier le plus bas 21 a pour premier effet de faire coulisser très lègerement vers le bas le portillon externe 5, à l'encontre de la butée élastique E, par l'intermédiaire du levier basculant 21,et ce assez pour décrocher l'un de l'autre les deux crochets 38, 39. Le portillon externe 5 est, de la sorte, déverrouillé. Par la suite, ces deux crochets 38, 39 suivent vers le bas des trajectoires différentes, l'un en arc de cercle centré sur l'axe fixe 28, l'autre en arc de cercle centré sur l'axe fixe 27. Par contre, quel que soit l'effort exercé à l'horizontale sur le portillon externe 5, en direction du vide, ne saurait provoquer le décrochement l'un de l'autre des deux crochets 38, 39 et de ce fait déverrouiller et laisser s'ouvrir le portillon externe 5 en basculant vers le haut.When the internal door 6 is in the high position, the ends of the tilting levers 21, 22, 23 carrying the sliding joints 33, 34, 35, along the internal door 6, come into contact or in close proximity to one another. The tilting levers 21 and 22, the lowest, are respectively provided, on their adjacent faces, with hooks 38, 39 directed in opposite directions to one another (FIG. 4). These two hooks 38, 39 constitute the means for locking the external door 5 in the closed position. A force exerted upwards on the internal gate 6, at the end of its upward stroke, brings the hooks 38, 39 into contact and hook them together, at point 0 in FIG. 4. In this position a force exerted upwards on the door 6 in the high position or on the lowest lever 21 has the first effect of causing the external door 5 to slide very slightly downwards, against the elastic stop E, by the intermediate of the rocking lever 21, and this enough to unhook the two hooks 38, 39 from one another. The external door 5 is, in this way, unlocked. Thereafter, these two hooks 38, 39 follow down trajectories different, one in an arc centered on the fixed axis 28, the other in an arc centered on the fixed axis 27. On the other hand, whatever the force exerted horizontally on the external gate 5, in the direction of the vacuum, can not cause the unhooking of one of the two hooks 38, 39 and therefore unlock and let open the external door 5 by tilting upwards.

Une troisième forme d'exécution de l'invention, comportant les mêmes moyens de liaison entre le portillon externe 5 et le portillon interne 6, est pourvue, ainsi que montré sur la figure 7, de moyens de verrouillage du portillon externe 5 en position de fermeture différents de la forme d'exécution précédente.A third embodiment of the invention, comprising the same means of connection between the external door 5 and the internal door 6, is provided, as shown in FIG. 7, with means for locking the external door 5 in the position of different from the previous embodiment.

Ces moyens de verrouillage sont constitués par une première bielle 41 articulée, à ses deux extrémités, d'une part sur l'extrémité externe du levier basculant inférieur 21, en 41a, et d'autre part sur le levier basculant supérieur 23, en 41b, à l'extrémité de ce levier, du côté de ces leviers basculants lié au portillon externe 5. Ces moyens de verrouillage comprennent ensuite une deuxième bielle 42 articulée, à ses deux extrémités, d'une part sur l'extrémité interne du levier basculant supérieur 23, en 42a, et d'autre part sur le levier basculant intermédiaire, en 42b, ainsi qu'une troisième bielle 43, articulée, à ses deux extrémités, d'une part sur l'extrémité interne du levier basculant intermédaire 22, en 43a, et d'autre part sur le levier basculant inférieur 21, en 43b. L'ensemble des deuxième et troisième bielles 42, 43 est placé du côté des leviers basculants proche du portillon interne 6. Le levier basculant inférieur 21 est réalisé en deux parties 21a et 21b en prolongement l'une de l'autre, réunies à leurs extrémités jointives par une liaison élastique 44 formant amortisseur, qui est disposé en dessous de la partie supérieure 21b, entre celle-ci et un support 45 solidaire de la partie inférieure 21a.These locking means are constituted by a first articulated rod 41, at its two ends, on the one hand on the external end of the lower rocker lever 21, at 41a, and on the other hand on the upper rocker lever 23, at 41b , at the end of this lever, on the side of these rocking levers linked to the external door 5. These locking means then comprise a second connecting rod 42 articulated, at its two ends, on the one hand on the internal end of the rocking lever upper 23, at 42a, and on the other hand on the intermediate rocking lever, at 42b, as well as a third connecting rod 43, articulated, at its two ends, on the one hand on the internal end of the intermediate rocking lever 22, at 43a, and on the other hand on the lower tilting lever 21, at 43b. The set of second and third connecting rods 42, 43 is placed on the side of the rocking levers close to the internal door 6. The bottom rocking lever 21 is made in two parts 21a and 21b in extension of one another, joined at their ends joined by an elastic link 44 forming a shock absorber, which is arranged below the upper part 21b, between the latter and a support 45 secured to the lower part 21a.

Du fait de cette conformation des moyens de verrouillage du portillon externe 5, un effort de poussée parallèle à la plate-forme 4 vers l'extérieur, selon la flèche F sur la figure 7, s'exerçant sur le portillon externe 5, se transmet par la bielle 41 au levier basculant supérieur 23. En position de fermeture le levier intermédiaire 22 et le levier supérieur 23 sont liés l'un à l'autre, à leurs extrémités internes supérieures, par la bielle 42 dont la ligne d'action X passe au-dessus de l'axe de rotation 28 du levier intermédiaire 22. Par conséquent lorsque le levier supérieur 23 tourne dans le sens des aiguilles d'une montre, il entraîne une réduction de la distance a entre l'axe de rotation 28 du levier intermédiaire 22 et l'extrémité supérieure du levier supérieur 23, c'est-à-dire l'articulation 42a. Dans ces conditions l'axe inférieur 42b de la bielle, qui est solidaire du levier intermédiaire 22, est contraint de se déplacer suivant la direction D, en entraînant ainsi le levier intermédiaire 22 dans le sens opposé au sens de rotation du levier supérieur 23, c'est-à-dire dans le sens inverse des aiguilles d'une montre. Les deux leviers intermédiaire 22 et supérieur 23 entrent alors en contact, à leurs extrémités supérieures, au point P et ils se trouvent par conséquent bloqués. Le portillon externe 5 est ainsi verrouillé en position de fermeture. Lorsqu'on exerce sur le portillon interne 6 une traction F1 vers le bas, la partie supérieure 21b du levier basculant inférieur 21 se replie élastiquement vers le bas, en comprimant l'amortisseur 44 maintenu par le support 45 solidaire de la partie inférieure 21a du levier 21 qui est maintenu bloqué. Par l'intermédiaire de la troisième bielle 43, la partie supérieure 21b, pivotant vers le bas dans le sens des aiguilles d'une montre, entraîne à son tour dans ce même sens le levier intermédiaire 22 auquel la troisième bielle 33 est reliée à son extrémité supérieure constituant l'articulation 44a. Après une rotation de quelques degrés du levier basculant intermédiaire 22, la ligne d'action X de la deuxième bielle 42 passe alors en dessous de l'axe de rotation 28 du levier intermédiaire 22 et à partir de ce moment le levier basculant supérieur 23 est entraîné en rotation dans le sens des aiguilles d'une montre autour de son axe 29. Le portillon externe 5 se trouve alors déverrouillé et il peut passer en position d'ouverture.Due to this configuration of the means for locking the external gate 5, a thrust force parallel to the platform 4 towards the outside, along the arrow F in FIG. 7, acting on the external gate 5, is transmitted by the connecting rod 41 to the upper rocking lever 23. In the closed position the intermediate lever 22 and the upper lever 23 are linked to each other, at their upper internal ends, by the connecting rod 42 whose line of action X passes above the axis of rotation 28 of the intermediate lever 22. Consequently when the upper lever 23 rotates clockwise , it causes a reduction in the distance a between the axis of rotation 28 of the intermediate lever 22 and the upper end of the upper lever 23, that is to say the articulation 42a. Under these conditions, the lower axis 42b of the connecting rod, which is integral with the intermediate lever 22, is forced to move in the direction D, thereby driving the intermediate lever 22 in the direction opposite to the direction of rotation of the upper lever 23, that is, counterclockwise. The two intermediate levers 22 and upper 23 then come into contact, at their upper ends, at point P and they are therefore blocked. The external door 5 is thus locked in the closed position. When a downward pull F1 is exerted on the internal gate 6, the upper part 21b of the lower rocking lever 21 is folded elastically downwards, compressing the damper 44 held by the support 45 integral with the lower part 21a of the lever 21 which is kept blocked. By means of the third connecting rod 43, the upper part 21b, pivoting downwards in a clockwise direction, in turn drives in this same direction the intermediate lever 22 to which the third connecting rod 33 is connected to its upper end constituting the articulation 44a. After a rotation of the intermediate tilting lever 22 a few degrees, the line of action X of the second connecting rod 42 then passes below the axis of rotation 28 of the intermediate lever 22 and from this moment the upper tilting lever 23 is rotated in the clockwise around its axis 29. The external gate 5 is then unlocked and it can pass into the open position.

Afin d'équilibrer les efforts exercés sur les deux portillons interne 5 et externe 6, pour chacune des formes d'exécution décrites, un dispositif selon l'invention est placé de préférence de chaque côté latéral de la barrière-écluse.In order to balance the forces exerted on the two internal 5 and external 6 gates, for each of the embodiments described, a device according to the invention is preferably placed on each lateral side of the barrier-lock.

Claims (5)

1. Pivotable safety gate constituted by a frame mounted at the edge of a platform 4, comprising two gates, namely an outer gate 5 towards the void and an inner gate 6 towards the interior of the platform, connected together by connecting means with the result that, in position of closure of the passage leading to the void, the outer gate is in a vertical position and in abutment on the floor of the platform, the inner gate being in upper position, and, in position of opening of the passage, the inner gate is brought into vertical position and in abutment on the floor of the platform, whilst the outer gate is in upper position, the passage between these two positions of each of the gates being effected automatically, characterized in that it comprises means for locking the outer gate 5 in position of closure of the passage leading to the void, opposing any pivoting under the effect of a horizontal effort exerted on the outer gate 5 in the direction of the void and automatically unblocking by a downwardly exerted traction exerted on the inner gate 6 in upper position.
2. Safety gate according to Claim 1, characterized in that the means for connection between the outer gate 5 and the inner gate 6 are constituted by a set of levers 7, comprising a first lever 8 and a second lever 14 articulated at a fixed point A, (said levers) fast with the outer gate 5, a control lever 9 fast with the inner gate 6 and bearing, near its end part opposite the inner gate 6, a lever for rotation 11 articulated on a fixed pin B and a connecting rod 13 articulated, at one of its ends C, on the first lever 8 and, at its other end D, on the end of the control lever 9.
3. Safety gate according to Claim 2, characterized in that the means for locking the outer gate 5 in position of closure are constituted by a bent arm 16 fast with the control lever 9 and coming into abutment on the connecting rod 13, when the inner gate 6 is in its upper position, via an elastic stop 17.
4. Safety gate according to Claim 1, in which the means for connection between the outer gate 5 and the inner gate 6 are constituted by three superposed pivoting levers 21, 22, 23, respectively fast, at their centres, with levers for rotation 24, 25, 26, progressively longer from bottom to top, perpendicular with respect to the respective pivoting levers, articulated on respective fixed horizontal pins 27, 28, 29 aligned vertically, the pivoting levers 21, 22, 23 being connected, at their ends, by articulations 30, 31, 32; 33, 34, 35 on one side to the outer gate 5 and on the other side to the inner gate 6, characterized in that the means for locking the outer gate 5 in position of closure are constituted by two hooks 38, 39 directed against each other, borne respectively by the faces of the intermediate pivoting lever 21 and lower pivoting lever 22 which are adjacent one another when the inner gate 6 is in upper position.
5. Safety gate according to Claim 1, in which the means for connection between the outer gate 5 and the inner gate 6 are constituted by three superposed pivoting levers 21, 22, 23 respectively fast at their centres with levers for rotation 24, 25, 26, progressively longer from bottom to top, perpendicular with respect to the respective pivoting levers, articulated on respective fixed horizontal pins 27, 28, 29, aligned vertically, the pivoting levers 21, 22, 23 being connected at their ends, by articulations 30, 31, 32; 33, 34, 35, on one side to the outer gate and, on the other side, to the inner gate 6, characterized in that the means for locking the outer gate 5 in position of closure are constituted by a first connecting rod 41 articulated, at its two ends, on the one hand on the outer end of the lower pivoting lever 21, at 41a, and, on the other hand, on the upper pivoting lever 23, at 41b at the end of this lever, on the side of these pivoting levers connected to the outer gate 5, a second connecting rod 42, articulated, at its two ends, on the one hand, on the inner end of the upper pivoting lever 23, at 42a, and, on the other hand, on the intermediate pivoting lever, at 42b, as well as a third connecting rod 43 articulated, at its two ends, on the one hand on the inner end of the intermediate pivoting lever 22, at 43a, and, on the other hand, on the lower pivoting lever 21, at 43b, the assembly of the second and third connecting rods 42, 43 is placed on the side of the pivoting levers close to the inner gate 6, the lower pivoting lever 21 being made in two parts 21a, 21b in line with each other, joined at their contiguous ends by an elastic connection 44 forming damper, which is disposed below the upper part 21b, between the latter and a support 45 fast with the lower part 21a.
EP89400377A 1988-02-11 1989-02-09 Pivotable mezzanine safety gate Expired - Lifetime EP0329535B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89400377T ATE63363T1 (en) 1988-02-11 1989-02-09 SWIVELING LOCK BARRIER TO SECURE THE PLATFORM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8801640 1988-02-11
FR8801640A FR2627214B1 (en) 1988-02-11 1988-02-11 TILTING SAFETY BARRIER FOR PLATFORM

Publications (2)

Publication Number Publication Date
EP0329535A1 EP0329535A1 (en) 1989-08-23
EP0329535B1 true EP0329535B1 (en) 1991-05-08

Family

ID=9363190

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89400377A Expired - Lifetime EP0329535B1 (en) 1988-02-11 1989-02-09 Pivotable mezzanine safety gate

Country Status (5)

Country Link
EP (1) EP0329535B1 (en)
AT (1) ATE63363T1 (en)
DE (1) DE68900076D1 (en)
ES (1) ES2023029B3 (en)
FR (1) FR2627214B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114150979B (en) * 2021-10-23 2023-06-27 台州中穗科技有限公司 Door structure for warehouse

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1293623A (en) * 1970-06-15 1972-10-18 John Lewis And Company Ltd Safety enclosure
FR2520788A1 (en) * 1982-02-01 1983-08-05 Roux Michel SAFETY BARRIER FOR PLATFORM
FR2601659A1 (en) * 1986-07-21 1988-01-22 Simon Andre Safety device for palletisation platform

Also Published As

Publication number Publication date
ATE63363T1 (en) 1991-05-15
EP0329535A1 (en) 1989-08-23
ES2023029B3 (en) 1991-12-16
DE68900076D1 (en) 1991-06-13
FR2627214A1 (en) 1989-08-18
FR2627214B1 (en) 1990-06-29

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