EP3242752A1 - Vibrating-screen sieve referred to as a tray sieve - Google Patents

Vibrating-screen sieve referred to as a tray sieve

Info

Publication number
EP3242752A1
EP3242752A1 EP15823723.0A EP15823723A EP3242752A1 EP 3242752 A1 EP3242752 A1 EP 3242752A1 EP 15823723 A EP15823723 A EP 15823723A EP 3242752 A1 EP3242752 A1 EP 3242752A1
Authority
EP
European Patent Office
Prior art keywords
screen
bridge
configuration
called
cover
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.)
Withdrawn
Application number
EP15823723.0A
Other languages
German (de)
French (fr)
Inventor
Gilles FRANCON
Sébastien FRANCON
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.)
Theophile Et Theophile
Original Assignee
Theophile Et Theophile
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Theophile Et Theophile filed Critical Theophile Et Theophile
Publication of EP3242752A1 publication Critical patent/EP3242752A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4627—Repairing of screening surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens

Definitions

  • the present invention relates to a screen with vibrating planes said screen with drawers.
  • a screen with vibrating planes or screen with drawers is an apparatus used to separate solids of different sizes by passing them, by gravity and by vibration, through sieves of different sizes, called grids in the case of screen.
  • Each grid occupies a level called stage in the sieve.
  • a screen comprising three grids arranged on three different levels is said to have three stages.
  • the grid at the top of the device has the largest caliber, the lower one having the smallest caliber.
  • the larger solids are held in the upper part of the unit, the smaller solids are removed in the lower part.
  • the screens are also used in other technical fields such as, for example, the food industry, the pharmaceutical or cosmetic industry, the recycling industry for separating and sorting bulk objects.
  • the number of grids depends on the calibration to be performed, generally between one and six.
  • US-A-2002/148760 discloses a vibrating screen with at least two screens whose access is provided with a cover mobile in translation.
  • the invention aims to provide a screen with drawers meeting the needs identified above.
  • the subject of the invention is a screen with vibrating planes, said screen with drawers, comprising at least two sieves called grids, a first fixed part, receiving said grids and provided with an opening, a second part called hood, movable in translation between a first closed position of the opening of the first part and a second open position allowing access to the grids, characterized in that it comprises a first fixed transversal bridge located in the lower part of the screen and adapted to ensure access to a first gate located at the bottom of the screen when the so-called bonnet portion is in an open configuration and to ensure only the passage from one side to the other of the screen when the so-called bonnet part is in closed configuration and in that it comprises at least one second gateway movable transverse between a first position said inactive where it prohibits access to at least a second gate located above the first gate when the so-called bonnet portion is in closed configuration and a second active position in which the second gateway defines a path to at least one second gate located above the first gate when the so-
  • first and at least a second transverse gangway ensures easy access to the different grids, whatever the height at which they are in relation to the base of the screen. Such access is not only secure for one or more operators but it also allows a safe passage from one side to the other of the screen.
  • such a vibrating plane screen may comprise one or more of the following characteristics:
  • the first transverse bridge is configured in V, the point being directed upwards.
  • the first transverse bridge is provided with a movable rail in translation according to the movement of the screen cover, said guardrail being fixed on said cover.
  • the second transverse bridge is formed of two half-bridges.
  • At least one of the half-gateways comprises a panel forming, in an inactive configuration, a guardrail and, in active configuration, defining, at least in part, a passage from one side to the other of the screen oriented according to the width of the screen .
  • Each half-gangway is provided with a panel defining in active configuration a passage from one side to the other, the panels of each half-gangway being adapted to, in active configuration, be coplanar in the extension of one of the other and thus define a gateway ensuring the passage from one side to another of the screen.
  • Each half-gateway goes from the inactive configuration to the active configuration by pivoting a lower edge of the panel around an axis of rotation parallel to slides ensuring the translation movement of the cover.
  • Each half-bridge is maintained in the active position by at least one stop member.
  • FIG. 1 is a side view, simplified, of a screen according to one embodiment of the invention, the cover portion being in closed configuration.
  • FIG. 2 is a partial front view, on another scale, of the screen of FIG.
  • FIG. 3 is a partial three-quarter view, on the same scale, of the screen as shown in Figure 2, the cover portion being in open configuration.
  • FIG. 4 is a partial view from above and on a larger scale, of the first bridge, according to the arrow IV in Figure 3, when the cover portion is in open configuration.
  • Figures 5 to 8 are perspective views, partial and on the same scale, the second gateway illustrating the passage of the latter from the inactive configuration to active.
  • Figure 1 illustrates a screen 1 according to one embodiment of the invention.
  • the sieve 1 is visible along a lateral face.
  • the invention will be described with reference to a sieve used in a quarry, to sieve, that is to say, to sort according to their particle size, materials of mineral origin, such as gravel, ore, rocks. It is conceivable that the invention applies to any solid material, in bulk, requiring sorting according to the size of the grains or parts. By way of non-limiting example, mention may be made of mechanical parts, fruits, capsules, food products, pharmaceuticals, cosmetics, solid waste to be recycled or other.
  • the screen 1 is positioned in height above the ground.
  • the screen 1 has a generally trapezoidal shape with an upper face 6 inclined from the belt 5 towards the ground 7. This inclination corresponds de facto to the inclination of the sieves-hence the grids according to the terminology used preferentially. arranged inside the screen 1, the passage of materials from one grid to the other is thus effected by vibration and by gravity.
  • bridges 8A, 8B; 9A, 9B are particularly suitable for intervening laterally on the outside of the screen.
  • a staircase 12 shown in Figure 2 ensures passage from the ground 7 and between the bridges 8A; 9A.
  • each side of the screen 1 is provided with a staircase, thus also ensuring the passage between the bridges 8B; 9B.
  • the gateways 8A, 8B; 9A, 9B do not allow a user to pass from one side to another of the screen 1 without going down to the ground.
  • the screen comprises a first transverse gangway 13, provided with a safety guardrail 14.
  • This Gateway 13 connects the two side bridges 9A, 9B located at the bottom of the screen 1.
  • the gateway 13 is, in the example, V-shaped whose tip 130 is oriented upwards.
  • the transverse gangway 13 is therefore located at the bottom of the screen 1, in the vicinity of the carpet 4.
  • the gangway 13 ensures the passage from one side to the other of the screen 1. This passage is assured whether the screen is in operation or not.
  • Slides 15, 16 are located above the bridge 13 and extend perpendicularly to the largest dimension of the latter. These slides 15, 16 are formed by beams H. They are held parallel by a spacer 17 and by brackets 18, 19 mounted on posts 20 constituting the frame 2. As appears particularly in Figures 1 to 3, the slides 15, 16 are located in the extension of the screen 1, according to the length L thereof.
  • the screen 1 consists of a fixed portion 100 housing the grids. This part 100 constitutes the major part of the screen 1.
  • a second movable portion 101 forms a cover that closes, in a closed configuration, an access opening inside the screen 1.
  • This cover 101 generally wedge-shaped as shown in FIG. 3, is formed at one end of the screen, in this case that closest to the gateway 13.
  • the cover 101 moves in translation along the slideways 15, 16, according to the arrow F3. This movement is done manually or, alternatively, motorized way. During this rectilinear translational movement, the guardrail 14 also moves.
  • the guardrail 14 has substantially a U-shaped cross section with a flat bottom and a U-shaped longitudinal section with a triangular bottom. In other words, it defines an open volume of shapes complementary to that of the gangway 13.
  • the guardrail 14 consists of tubes.
  • the ends 21, 22 of the tubes 23, 24 delimiting the length L14 of the railing 14 are fixed, advantageously permanently, for example by welding or screwing, on the cover 101. Fixing is done in the vicinity of the flanks of the cover 101, so that the length L14 of the rail 14 corresponds substantially to the width L101 of the cover 101, therefore of the screen 1.
  • the guardrail 14 follows the translational movement of the cover 101 on which it is fixed. Therefore, when the cover 101 is open, the rail 14 extends outside the screen 1 and, in this configuration, has no protective role in relation to the gateway 13.
  • the gateway 13 is fixed and positioned under the hood 101, the tip 130 of the V constituting the gateway 13 being at an altitude slightly lower than that of the base of the cover 101.
  • the bridge 13 always ensures the passage of a user from one side to the other of the screen 1, so between the gateways 9A, 9B, without hindering the opening and closing movement of the hood 101 of the screen 1.
  • the gateway 13 allows in all configurations of the screen 1 to pass from one side to another, although in the open configuration of the cover 101, it is no longer in direct contact with the guardrail 14.
  • the protection of a user against a possible fall during passage on the gateway 13 is ensured.
  • the amplitude of the displacement of the cover 101 is adapted so that the bridge 13 is adjacent to the cover 101 in open configuration.
  • the internal members 102 of the cover 101, as well as the walls of the latter participate in the protection against falls of the user when it uses the bridge 13.
  • These bodies 102 are, in this case, rubber protection strips which, when the cap 101 is in the closed configuration, come into contact with the ends of the grids and avoid projections of materials out of them. Due to the proximity between the members 102 and the bridge 13, a user is protected against falls, towards the outside of the screen at least.
  • the screen object of the invention comprises at least a second transverse bridge 25.
  • This second gateway 25 is movable and formed, in the example, two half-bridges 250, 251.
  • the transverse gateway 25 connects, in active configuration, the two sides of the screen 1, thus the gateways 8A, 8B, this in a manner similar to the transverse gateway 13.
  • the two half-gateways 250, 251 are particularly visible in FIGS. 7 and 8 Here they are identical, both in terms of their configurations and their dimensions. As a variant, they are not identical, for example they are of different lengths.
  • a gateway 25 or a half gateway 250 located near the upper face 6 of the screen 1 is shown. It is located in the extension of the side bridge 8A. Thus, as shown in FIG. 1, the transverse half-bridge 251 is mounted on the slides 15, 16. In a variant, one or more other gateways, similar to the gateway 25, are provided at lower heights, namely between 6 and the bridge 13. It is understood that the number and / or the position of the gateway (s) 25 is (are) adapted (s) to the size and geometric configuration of the screen.
  • the half-gateway 250 is in the so-called inactive position. It will be understood that the half-gateways 250 and 251 being identical, the following also relates to the half-gateway 251. Indeed, the half-gateway 251 is here identical, in a mirror, to the half gateway 250. It will therefore not be described more precisely and it will be referred to the half gateway 250.
  • the half-gateway 250 forms a protective barrier and prevents a user not only to approach the upper part 100 of the screen 1, but also to drop when it is on the terminal platform 120 of the 12.
  • the half-gateway 250 comprises a wire mesh 254 defining a vertical panel facing the other half-gate 251.
  • the half-bridge is full or perforated, for example grating type. Frames 252, 253, perpendicular to the panel 254 and parallel to each other, complete the half-bridge 250.
  • a frame 252 is fixed by one of its sides on one side of the platform 120 of the stairs 12 and the other frame 253 is attached by one side to the panel 254.
  • the half-bridge 250 is substantially L-shaped.
  • the half-gangways 250, 251 thus define railings forming a railing integral with the end platform 120 of the staircase 12.
  • locking known per se such as latches, pins, key locks or badge or carabiners, ensure the blocking said inactive position of the half-gateways 250, 251, thus optimizing security.
  • FIG. 6 illustrates the passage of the half gateway 250 from the inactive configuration to a so-called active configuration. More precisely, FIG. 6 represents the beginning of the movement made by the half-gateway 250 to go from the inactive position to the active position. This passage takes place, after unlocking the locking members, by pivoting according to the arrow F4 of a lower edge 255 of the panel 254 of the half-gateway 250 about an axis of rotation parallel to the longer length of the slides 15 or 16. This pivoting can be manual, assisted or fully motorized, for example with a jack or a rack.
  • the pivoting of the panel 254 automatically causes the pivoting of the frame 253 to which it is attached, while the frame 252 remains in place, being secured, for example by screwing or welding, the platform 120.
  • stop members 26 are two identical corners 26 mounted on one side of the slide 15 or 16.
  • stop members for example rubber studs, a bar support or chain.
  • the frames 252, 253 are coplanar and in the extension of one another.
  • the two half-bridges 250, 251 in active configuration have their respective panels 254 coplanar and located in the extension of one another so as to form the transverse bridge 25 whose length substantially corresponds to twice the H254 height of a panel 254, so de facto substantially to the width L101 of the screen 1.
  • the vertical frames 253, half-gangways 250, 251 are also coplanar and in the extension of one another, so as to form a transverse rail perpendicular to the panels 254 of the half-bridges 250, 251 .
  • the half-bridges can be mounted on slides so that the half-bridges can be moved in translation to move closer to or away from the screen, depending on whether the cover 101 is open or not.
  • the frames 253 provide protection against falls, only the outer side of the screen.
  • the absence of frame, therefore of protection, of the inward facing side of the screen allows, in open configuration of the cover 101, to intervene on the grids 271, 272 of the screen 1, so on the grids located in the upper part of the screen 1.
  • This intervention is not only safe but with optimal ergonomics, each user is at working height, without having to bend or climb in height to intervene on the grids 270 to 272.
  • each half-bridge 250, 251 is formed of several parts, movable together, for example by telescopic fitting, which allows an elongation of each panel 254 in active configuration with respect to the inactive configuration, thus defining a bridge of great length.
  • At least one half-gangway 250 or 251 is provided with a double floor sliding on runners.
  • the platform 120 comprises a fixed base and a moving part in translation, which allows, by telescopic extension, to form a bridge 25 of great length, it being understood that the movement and the dimensions of the panels 254 are identical to those described above.

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Abstract

The invention relates to a sieve (1) comprising a first stationary portion, receiving the screens, and a second portion (101) referred to as the cover, translatable (F3) between a first position of closure of the opening of the first portion and a second opening position enabling access to the screens. The invention comprises a first stationary transverse walkway (13) located at the bottom portion of the sieve and suitable for providing access to a first screen when the cover (101) is in the open configuration and to provide access from one side of the sieve to the other only when the cover (101) is in the closed configuration. It comprises at least one second transverse walkway (25) movable between a first position that prohibits access to at least a second screen when the cover (101) is closed and a second position, referred to as the active position, in which the second walkway (25) defines an access path to at least a second screen when the cover (101) is open, the second transverse walkway (25) also defining, in the active position, an access from one side of the sieve to the other, above the first transverse walkway (13).

Description

CRIBLE A PLANS VIBRANTS DIT CRIBLE A TIROIRS  VIBRANT PLYWALL SCREEN DRIVES WITH DRAWERS
La présente invention concerne un crible à plans vibrants dit crible à tiroirs. The present invention relates to a screen with vibrating planes said screen with drawers.
Un crible à plans vibrants ou crible à tiroirs, est un appareil utilisé pour séparer des solides de différentes tailles en les faisant passer, par gravité et par vibration, à travers des tamis de différents calibres, dénommés grilles dans le cas de crible. Chaque grille occupe un niveau dénommé étage dans le crible. Ainsi, un crible comportant trois grilles disposées sur trois niveaux différents est dit à trois étages.  A screen with vibrating planes or screen with drawers, is an apparatus used to separate solids of different sizes by passing them, by gravity and by vibration, through sieves of different sizes, called grids in the case of screen. Each grid occupies a level called stage in the sieve. Thus, a screen comprising three grids arranged on three different levels is said to have three stages.
Par la suite, les termes grilles et étages seront employés préférentiellement aux termes tamis et niveaux.  Subsequently, the terms grids and floors will be used preferentially under terms sieves and levels.
En l'espèce, la grille située en partie haute de l'appareil a le plus gros calibre, celle située en partie basse ayant le plus petit calibre. En d'autres termes, les solides de plus grandes tailles sont retenus en partie haute de l'appareil, les solides de plus petites tailles sont évacués en partie basse. De tels appareils sont utilisés dans différentes industries, notamment dans les carrières pour séparer les granulats et roches, en fonction du calibre de ces derniers. Les cribles sont également utilisés dans d'autres domaines techniques tel que, par exemple, l'agro-alimentaire, l'industrie pharmaceutique ou cosmétique, l'industrie du recyclage pour séparer et trier des objets en vrac. Le nombre de grilles est fonction du calibrage à effectuer, généralement compris entre un et six.  In this case, the grid at the top of the device has the largest caliber, the lower one having the smallest caliber. In other words, the larger solids are held in the upper part of the unit, the smaller solids are removed in the lower part. Such devices are used in different industries, including quarries to separate aggregates and rocks, depending on the caliber of the latter. The screens are also used in other technical fields such as, for example, the food industry, the pharmaceutical or cosmetic industry, the recycling industry for separating and sorting bulk objects. The number of grids depends on the calibration to be performed, generally between one and six.
Dans la mesure où les cribles de plus grandes tailles se rencontrent essentiellement dans l'industrie des carrières et des mines, l'invention sera décrite en référence à ce domaine technique, étant entendu qu'un crible objet de l'invention trouve son application dans tous domaines techniques, autres que ceux cités précédemment, faisant appel au criblage.  Since larger sieves are mainly found in the quarry and mining industry, the invention will be described with reference to this technical field, it being understood that a sieve which is the subject of the invention finds its application in all technical fields, other than those mentioned above, using screening.
Lors des opérations de maintenance d'un crible, typiquement pour changer ou réparer une grille, il convient d'ouvrir le crible. Dans le cas d'un crible à tiroirs, une partie latérale formant couvercle coulisse sur des rails, à la manière d'un tiroir, et permet l'accès à l'intérieur du crible. On connaît ainsi par US-A-2002/148760 un crible à plan vibrants comportant au moins deux tamis dont l'accès est pourvu d'un capot mobile en translation. During maintenance operations of a screen, typically to change or repair a grid, it is necessary to open the screen. In the case of a drawer screen, a side portion forming a lid slides on rails, in the manner of a drawer, and allows access to the interior of the screen. Thus, US-A-2002/148760 discloses a vibrating screen with at least two screens whose access is provided with a cover mobile in translation.
Si l'accès à la grille située en partie basse pose peu de problème, l'opérateur étant généralement à hauteur de travail, il n'en demeure pas moins que cet accès n'est généralement pas sécurisé. En effet, l'opérateur doit se tenir sur un des bords du crible ouvert, sans élément de sécurité dédié. Ceci est encore plus vrai pour les grilles situées en partie haute du crible. En effet, l'accès, pour être à hauteur de travail, se fait par les côtés du crible, sans protection particulière, qui plus est en hauteur, et oblige le ou les utilisateurs à des manœuvres pour le moins pénibles si ce n'est dangereuses compte tenu des dimensions, du poids des grilles et de leur accessibilité. II existe donc un besoin pour un crible dont l'accès aux différentes grilles s'effectue de manière aisée et sécurisée.  If access to the grid located in the lower part poses little problem, the operator is generally working height, the fact remains that this access is generally not secure. Indeed, the operator must stand on one of the edges of the open screen, without dedicated security element. This is even more true for the grids at the top of the screen. Indeed, the access, to be at working height, is done by the sides of the screen, without special protection, which is higher, and requires the user or users to maneuvers to the least painful if not dangerous, given the dimensions, the weight of the grilles and their accessibility. There is therefore a need for a screen whose access to the different grids is easy and secure.
Pour cela, on connaît des cribles de type crible à tiroirs équipés d'une plateforme de travail amovible en deux parties ou d'une plateforme en une seule partie qui est rétractable sous un tamis ou grille. De tels cribles sont, par exemple, ceux commercialisés respectivement par les sociétés KH MINERAL et METSO. Si de tels cribles offrent une solution d'accès sécurisée à la grille située en partie basse du crible, il n'en demeure pas moins que l'accès à toutes les grilles, sur toute la hauteur du crible, n'est pas réalisé de manière sécurisée.  For this, there are known sieves screen type with drawers equipped with a removable work platform in two parts or a platform in one piece that is retractable under a sieve or grid. Such screens are, for example, those marketed respectively by the companies KH MINERAL and METSO. If such screens offer a secure access solution to the grid at the bottom of the screen, the fact remains that access to all the grids, the entire height of the screen, is not realized secure way.
Dans ces conditions, l'invention vise à proposer un crible à tiroirs répondant aux besoins identifiés précédemment.  Under these conditions, the invention aims to provide a screen with drawers meeting the needs identified above.
A cet effet, l'invention a pour objet un crible à plans vibrants dit crible à tiroirs, comprenant au moins deux tamis dits grilles, une première partie fixe, recevant lesdites grilles et pourvue d'une ouverture, une seconde partie dite capot, mobile en translation entre une première position d'obturation de l'ouverture de la première partie et une seconde position d'ouverture autorisant l'accès aux grilles, caractérisé en ce qu'il comprend une première passerelle transversale, fixe, située en partie basse du crible et adaptée pour assurer l'accès à une première grille située en partie basse du crible lorsque la partie dite capot est en configuration ouverte et pour assurer seulement le passage d'un côté à l'autre du crible lorsque la partie dite capot est en configuration fermée et en ce qu'il comprend au moins une seconde passerelle transversale mobile entre une première position dite inactive où elle interdit l'accès à au moins une seconde grille située au-dessus de la première grille lorsque la partie dite capot est en configuration fermée et une seconde position dite active dans laquelle la seconde passerelle définit un chemin d'accès à au moins une seconde grille située au-dessus de la première grille lorsque la partie dite capot est en configuration ouverte, ladite seconde passerelle transversale définissant également, en position dite active, un passage d'un côté à l'autre du crible, au-dessus de la première passerelle transversale. For this purpose, the subject of the invention is a screen with vibrating planes, said screen with drawers, comprising at least two sieves called grids, a first fixed part, receiving said grids and provided with an opening, a second part called hood, movable in translation between a first closed position of the opening of the first part and a second open position allowing access to the grids, characterized in that it comprises a first fixed transversal bridge located in the lower part of the screen and adapted to ensure access to a first gate located at the bottom of the screen when the so-called bonnet portion is in an open configuration and to ensure only the passage from one side to the other of the screen when the so-called bonnet part is in closed configuration and in that it comprises at least one second gateway movable transverse between a first position said inactive where it prohibits access to at least a second gate located above the first gate when the so-called bonnet portion is in closed configuration and a second active position in which the second gateway defines a path to at least one second gate located above the first gate when the so-called bonnet portion is in an open configuration, said second transverse gateway also defining, in so-called active position, a passage from one side to the other from the screen, above the first transverse bridge.
Ainsi, avec une première et au moins une seconde passerelle transversales, on assure un accès aisé aux différentes grilles, quelle que soit la hauteur à laquelle elles se trouvent par rapport à la base du crible. Un tel accès est non seulement sécurisé pour un ou plusieurs opérateurs mais il permet de plus un passage en sécurité d'un côté à l'autre du crible.  Thus, with a first and at least a second transverse gangway, it ensures easy access to the different grids, whatever the height at which they are in relation to the base of the screen. Such access is not only secure for one or more operators but it also allows a safe passage from one side to the other of the screen.
Selon des aspects avantageux mais non obligatoires de l'invention, un tel crible à plans vibrants peut comprendre une ou plusieurs des caractéristiques suivantes: According to advantageous but non-mandatory aspects of the invention, such a vibrating plane screen may comprise one or more of the following characteristics:
- La première passerelle transversale est configurée en V, la pointe étant orientée vers le haut. - The first transverse bridge is configured in V, the point being directed upwards.
- La première passerelle transversale est pourvue d'une rambarde mobile en translation selon le déplacement du capot du crible, ladite rambarde étant fixée sur ledit capot.  - The first transverse bridge is provided with a movable rail in translation according to the movement of the screen cover, said guardrail being fixed on said cover.
- En position ouverte du capot, une partie de ce dernier définit une rambarde de protection de la première passerelle transversale.  - In the open position of the cover, a part of the latter defines a protective guardrail of the first transverse bridge.
- La seconde passerelle transversale est formée de deux demi-passerelles.  - The second transverse bridge is formed of two half-bridges.
- Au moins une des demi-passerelles comporte un panneau formant, en configuration inactive, une rambarde et, en configuration active, définissant, au moins en partie, un passage d'un côté à l'autre du crible orienté selon la largeur du crible.  - At least one of the half-gateways comprises a panel forming, in an inactive configuration, a guardrail and, in active configuration, defining, at least in part, a passage from one side to the other of the screen oriented according to the width of the screen .
- Chaque demi-passerelle est pourvue d'un panneau définissant en configuration active un passage d'un côté à l'autre, les panneaux de chaque demi-passerelle étant adaptés pour, en configuration active, être coplanaires dans le prolongement l'un de l'autre et ainsi définir une passerelle assurant le passage d'un côté à l'autre du crible. - Chaque demi-passerelle passe de la configuration inactive à la configuration active par pivotement d'un bord inférieur du panneau autour d'un axe de rotation parallèle à des glissières assurant le mouvement de translation du capot. Each half-gangway is provided with a panel defining in active configuration a passage from one side to the other, the panels of each half-gangway being adapted to, in active configuration, be coplanar in the extension of one of the other and thus define a gateway ensuring the passage from one side to another of the screen. Each half-gateway goes from the inactive configuration to the active configuration by pivoting a lower edge of the panel around an axis of rotation parallel to slides ensuring the translation movement of the cover.
- Chaque demi-passerelle est maintenue en position active par au moins un organe d'arrêt.  - Each half-bridge is maintained in the active position by at least one stop member.
L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lecture de la description qui va suivre d'un mode de réalisation de l'invention, donnée uniquement à titre d'exemple non limitatif et faite en référence aux dessins annexés dans lesquels:  The invention will be better understood and other advantages thereof will appear more clearly on reading the following description of an embodiment of the invention, given solely by way of non-limiting example and made in reference to the accompanying drawings in which:
- La figure 1 est une vue latérale, simplifiée, d'un crible conforme à un mode de réalisation de l'invention, la partie formant capot étant en configuration fermée.  - Figure 1 is a side view, simplified, of a screen according to one embodiment of the invention, the cover portion being in closed configuration.
- La figure 2 est une vue partielle de face, à une autre échelle, du crible de la figure 1 .  FIG. 2 is a partial front view, on another scale, of the screen of FIG.
- La figure 3 est une vue partielle de trois-quarts, à la même échelle, du crible tel qu'illustré à la figure 2, la partie formant capot étant en configuration ouverte.  - Figure 3 is a partial three-quarter view, on the same scale, of the screen as shown in Figure 2, the cover portion being in open configuration.
- La figure 4 est une vue partielle de dessus et à plus grande échelle, de la première passerelle, selon la flèche IV à la figure 3, lorsque la partie formant capot est en configuration ouverte.  - Figure 4 is a partial view from above and on a larger scale, of the first bridge, according to the arrow IV in Figure 3, when the cover portion is in open configuration.
Les figures 5 à 8 sont des vues en perspective, partielles et à la même échelle, de la seconde passerelle illustrant le passage de cette dernière de la configuration inactive à active.  Figures 5 to 8 are perspective views, partial and on the same scale, the second gateway illustrating the passage of the latter from the inactive configuration to active.
La figure 1 illustre un crible 1 conforme à un mode de réalisation de l'invention. Le crible 1 est visible selon une face latérale. Par la suite, l'invention sera décrite en référence à un crible utilisé dans une carrière, pour tamiser, c'est-à-dire pour trier selon leurs granulométries, des matériaux d'origine minérale, tels que du gravier, du minerai, des roches. On conçoit que l'invention s'applique à tout matériau solide, en vrac, nécessitant un tri selon la taille des grains ou des pièces. A titre d'exemple non limitatif, on peut citer des pièces mécaniques, des fruits, des gélules, des produits alimentaires, pharmaceutiques, cosmétiques, des déchets solides à recycler ou autres. Comme illustré, le crible 1 est positionné en hauteur au-dessus du sol. Typiquement, il repose sur un bâti 2, connu en soi, formé de poutrelles métalliques fixées au sol par des plots 3 en béton. La hauteur du crible par rapport au sol est adaptée pour assurer le passage d'un tapis roulant 4 permettant l'évacuation des matériaux tamisés vers un autre poste de travail, selon la flèche F1 . Un autre tapis roulant 5 assure, selon la flèche F2, l'alimentation du crible en matériau à tamiser. Ce tapis 5 déverse les matériaux sur le haut du crible, le tapis 4 récupérant les matériaux tamisés en partie inférieure du crible 1 . Comme illustré, le crible 1 a globalement une forme trapézoïdale avec une face supérieure 6 inclinée à partir du tapis 5 en direction du sol 7. Cette inclinaison correspond de facto à l'inclinaison des tamis-donc ici des grilles selon la terminologie employée préférentiellement- disposés à l'intérieur du crible 1 , le passage des matériaux d'une grille à l'autre s'effectuant ainsi par vibration et par gravité. Figure 1 illustrates a screen 1 according to one embodiment of the invention. The sieve 1 is visible along a lateral face. Subsequently, the invention will be described with reference to a sieve used in a quarry, to sieve, that is to say, to sort according to their particle size, materials of mineral origin, such as gravel, ore, rocks. It is conceivable that the invention applies to any solid material, in bulk, requiring sorting according to the size of the grains or parts. By way of non-limiting example, mention may be made of mechanical parts, fruits, capsules, food products, pharmaceuticals, cosmetics, solid waste to be recycled or other. As illustrated, the screen 1 is positioned in height above the ground. Typically, it rests on a frame 2, known per se, formed of metal beams fixed to the ground by studs 3 of concrete. The height of the screen relative to the ground is adapted to ensure the passage of a conveyor belt 4 allowing the evacuation of sieved materials to another workstation, according to the arrow F1. Another conveyor belt 5 ensures, according to the arrow F2, the supply of the screen material to be sieved. This mat 5 pours the materials on the top of the screen, the mat 4 recovering the sieved material in the lower part of the screen 1. As illustrated, the screen 1 has a generally trapezoidal shape with an upper face 6 inclined from the belt 5 towards the ground 7. This inclination corresponds de facto to the inclination of the sieves-hence the grids according to the terminology used preferentially. arranged inside the screen 1, the passage of materials from one grid to the other is thus effected by vibration and by gravity.
On note, à la figure 1 , la présence de deux passerelles latérales 8A, 8B ; 9A, 9B fixes disposées de part et d'autre du crible 1 , selon la longueur L de ce dernier. Des rambardes 10, 11 assurent une protection contre les chutes lorsqu'un utilisateur emprunte respectivement les passerelles 8A, 8B ; 9A, 9B. Les passerelles 8A, 8B sont situées en partie haute du crible, au voisinage de la grille 5 alors que les passerelles 9A, 9B sont situées en partie basse du crible, au voisinage du tapis 4. Grâce à ces passerelles, il est possible de longer un côté ou l'autre du crible et d'accéder ainsi aux flancs de ce dernier, selon la hauteur H du crible 1 . Ces passerelles 8A, 8B ; 9A, 9B, connues en soi, sont particulièrement adaptées pour intervenir latéralement sur l'extérieur du crible. Un escalier 12, illustré à la figure 2, assure le passage depuis le sol 7 et entre les passerelles 8A ; 9A. Dans un autre mode de réalisation, chaque côté du crible 1 est pourvu d'un escalier, assurant ainsi également le passage entre les passerelles 8B ; 9B.  It is noted in Figure 1, the presence of two side bridges 8A, 8B; 9A, 9B fixed disposed on either side of the screen 1, according to the length L of the latter. Guardrails 10, 11 provide protection against falls when a user borrows the bridges respectively 8A, 8B; 9A, 9B. The gangways 8A, 8B are located in the upper part of the screen, in the vicinity of the grid 5 while the gangways 9A, 9B are located in the lower part of the screen, in the vicinity of the carpet 4. With these bridges, it is possible to follow one side or the other of the screen and thus access the sides of the latter, according to the height H of the screen 1. These bridges 8A, 8B; 9A, 9B, known per se, are particularly suitable for intervening laterally on the outside of the screen. A staircase 12, shown in Figure 2, ensures passage from the ground 7 and between the bridges 8A; 9A. In another embodiment, each side of the screen 1 is provided with a staircase, thus also ensuring the passage between the bridges 8B; 9B.
Comme cela ressort de la figure 2, les passerelles 8A, 8B ; 9A, 9B ne permettent pas à un utilisateur de passer d'un côté à l'autre du crible 1 sans descendre au sol. Selon l'invention, pour remédier à cela, le crible comprend une première passerelle transversale 13, pourvue d'une rambarde de sécurité 14. Cette passerelle 13 relie les deux passerelles latérales 9A, 9B situées en partie basse du crible 1 . As is apparent from Figure 2, the gateways 8A, 8B; 9A, 9B do not allow a user to pass from one side to another of the screen 1 without going down to the ground. According to the invention, to remedy this, the screen comprises a first transverse gangway 13, provided with a safety guardrail 14. This Gateway 13 connects the two side bridges 9A, 9B located at the bottom of the screen 1.
La passerelle 13 est, dans l'exemple, en forme de V dont la pointe 130 est orientée vers le haut. La passerelle transversale 13 est située en conséquence en partie basse du crible 1 , au voisinage du tapis 4. La passerelle 13 assure le passage d'un côté à l'autre du crible 1 . Ce passage est assuré, que le crible soit en fonctionnement ou non. Des glissières 15, 16 sont situées au-dessus de la passerelle 13 et s'étendent perpendiculairement à la plus grande dimension de cette dernière. Ces glissières 15, 16 sont formées par des poutres en H. Elles sont maintenues parallèles par une entretoise 17 et par des équerres 18, 19 montées sur des poteaux 20 constitutifs du bâti 2. Comme cela apparaît particulièrement aux figures 1 à 3, les glissières 15, 16 sont situées dans le prolongement du crible 1 , selon la longueur L de celui-ci.  The gateway 13 is, in the example, V-shaped whose tip 130 is oriented upwards. The transverse gangway 13 is therefore located at the bottom of the screen 1, in the vicinity of the carpet 4. The gangway 13 ensures the passage from one side to the other of the screen 1. This passage is assured whether the screen is in operation or not. Slides 15, 16 are located above the bridge 13 and extend perpendicularly to the largest dimension of the latter. These slides 15, 16 are formed by beams H. They are held parallel by a spacer 17 and by brackets 18, 19 mounted on posts 20 constituting the frame 2. As appears particularly in Figures 1 to 3, the slides 15, 16 are located in the extension of the screen 1, according to the length L thereof.
Comme cela ressort de la figure 3, le crible 1 est constitué d'une partie fixe 100 abritant les grilles. Cette partie 100 constitue la majeure partie du crible 1 . Une seconde partie mobile 101 , forme un capot qui obture, en configuration fermée, une ouverture d'accès à l'intérieur du crible 1 . Ce capot 101 , globalement en forme de coin comme illustré à la figure 3, est ménagé à une extrémité du crible, en l'espèce celle au plus près de la passerelle 13. Pour passer de la configuration fermée de la figure 1 à la configuration ouverte de la figure 3, le capot 101 se déplace en translation le long des glissières 15, 16, selon la flèche F3. Ce déplacement est effectué manuellement ou, en variante, de manière motorisée. Lors de ce mouvement de translation rectiligne, la rambarde 14 se déplace également.  As is apparent from Figure 3, the screen 1 consists of a fixed portion 100 housing the grids. This part 100 constitutes the major part of the screen 1. A second movable portion 101 forms a cover that closes, in a closed configuration, an access opening inside the screen 1. This cover 101, generally wedge-shaped as shown in FIG. 3, is formed at one end of the screen, in this case that closest to the gateway 13. To go from the closed configuration of FIG. 1 to the configuration 3, the cover 101 moves in translation along the slideways 15, 16, according to the arrow F3. This movement is done manually or, alternatively, motorized way. During this rectilinear translational movement, the guardrail 14 also moves.
En effet, la rambarde 14 a sensiblement une section transversale en U à fond plat et une section longitudinale en U à fond triangulaire. En d'autres termes, elle définit un volume ouvert de formes complémentaires à celle de la passerelle 13. La rambarde 14 est constituée de tubes. Les extrémités 21 , 22 des tubes 23, 24 délimitant la longueur L14 de la rambarde 14 sont fixées, avantageusement de manière définitive, par exemple par soudage ou vissage, sur le capot 101 . La fixation se fait au voisinage des flancs du capot 101 , de sorte que la longueur L14 de la rambarde 14 correspond sensiblement à la largeur L101 du capot 101 , donc du crible 1 . Indeed, the guardrail 14 has substantially a U-shaped cross section with a flat bottom and a U-shaped longitudinal section with a triangular bottom. In other words, it defines an open volume of shapes complementary to that of the gangway 13. The guardrail 14 consists of tubes. The ends 21, 22 of the tubes 23, 24 delimiting the length L14 of the railing 14 are fixed, advantageously permanently, for example by welding or screwing, on the cover 101. Fixing is done in the vicinity of the flanks of the cover 101, so that the length L14 of the rail 14 corresponds substantially to the width L101 of the cover 101, therefore of the screen 1.
Dans la configuration ouverte du capot 101 , la rambarde 14 suit le mouvement de translation du capot 101 sur lequel elle est fixée. De ce fait, lorsque le capot 101 est ouvert, la rambarde 14 s'étend à l'extérieur du crible 1 et, dans cette configuration, n'a aucun rôle de protection en relation avec la passerelle 13. La passerelle 13 est fixe et positionnée sous le capot 101 , la pointe 130 du V constitutif de la passerelle 13 étant à une altitude légèrement inférieure à celle de la base du capot 101 . Ainsi, la passerelle 13 assure toujours le passage d'un utilisateur d'un côté à l'autre du crible 1 , donc entre les passerelles 9A, 9B, sans gêner le mouvement d'ouverture et de fermeture du capot 101 du crible 1 . En d'autres termes, la passerelle 13 permet dans toutes les configurations du crible 1 de passer d'un côté à l'autre, bien que dans la configuration ouverte du capot 101 , elle ne soit plus en contact direct avec la rambarde 14.  In the open configuration of the cover 101, the guardrail 14 follows the translational movement of the cover 101 on which it is fixed. Therefore, when the cover 101 is open, the rail 14 extends outside the screen 1 and, in this configuration, has no protective role in relation to the gateway 13. The gateway 13 is fixed and positioned under the hood 101, the tip 130 of the V constituting the gateway 13 being at an altitude slightly lower than that of the base of the cover 101. Thus, the bridge 13 always ensures the passage of a user from one side to the other of the screen 1, so between the gateways 9A, 9B, without hindering the opening and closing movement of the hood 101 of the screen 1. In other words, the gateway 13 allows in all configurations of the screen 1 to pass from one side to another, although in the open configuration of the cover 101, it is no longer in direct contact with the guardrail 14.
Néanmoins, comme cela est visible sur la figure 4, la protection d'un usager contre une chute éventuelle lors du passage sur la passerelle 13 est assurée. En effet, l'amplitude du déplacement du capot 101 est adaptée pour que la passerelle 13 soit mitoyenne du capot 101 en configuration ouverte. Dans ce cas, les organes internes 102 du capot 101 , ainsi que les parois de ce dernier, participent à la protection contre les chutes de l'utilisateur lorsque celui-ci emprunte la passerelle 13. Ces organes 102 sont, en l'espèce, des bandes de protection en caoutchouc qui, lorsque le capot 101 est en configuration fermée viennent au contact des extrémités des grilles et évitent les projections de matériaux hors de celles-ci. De par la proximité entre les organes 102 et la passerelle 13, un utilisateur est protégé contre les chutes, en direction de l'extérieur du crible au moins. De cette manière, il peut intervenir sur l'intérieur du crible et, par exemple, effectuer des opérations de maintenance sur la grille 270 située en partie basse du crible, cela tout en ayant la possibilité de passer d'un côté à l'autre du crible 1 . Dans un mode de réalisation non illustré, une rambarde amovible ou pliable est prévue sur la passerelle 13. Avec une telle solution, on assure une intervention sécurisée en partie basse du crible 1 , que le capot 101 soit ouvert ou non. Pour assurer également une intervention en sécurité en partie haute du crible, le crible objet de l'invention comprend au moins une seconde passerelle transversale 25. Cette seconde passerelle 25 est mobile et formée, dans l'exemple, de deux demi-passerelles 250, 251 . La passerelle transversale 25 relie, en configuration active, les deux côtés du crible 1 , donc les passerelles 8A, 8B, cela de façon similaire à la passerelle transversale 13. Les deux demi-passerelles 250, 251 sont particulièrement visibles aux figures 7 et 8. Ici elles sont identiques, tant en ce qui concerne leurs configurations que leurs dimensions. En variante, elles ne sont pas identiques, par exemple elles sont de longueurs différentes. Nevertheless, as can be seen in FIG. 4, the protection of a user against a possible fall during passage on the gateway 13 is ensured. Indeed, the amplitude of the displacement of the cover 101 is adapted so that the bridge 13 is adjacent to the cover 101 in open configuration. In this case, the internal members 102 of the cover 101, as well as the walls of the latter, participate in the protection against falls of the user when it uses the bridge 13. These bodies 102 are, in this case, rubber protection strips which, when the cap 101 is in the closed configuration, come into contact with the ends of the grids and avoid projections of materials out of them. Due to the proximity between the members 102 and the bridge 13, a user is protected against falls, towards the outside of the screen at least. In this way, it can intervene on the inside of the screen and, for example, carry out maintenance operations on the grid 270 located in the lower part of the screen, while having the possibility of going from one side to the other from the screen 1. In a non-illustrated embodiment, a removable or foldable guardrail is provided on the bridge 13. With such a solution, it ensures a safe intervention in the lower part of the screen 1, whether the cover 101 is open or not. To also ensure a safety intervention in the upper part of the screen, the screen object of the invention comprises at least a second transverse bridge 25. This second gateway 25 is movable and formed, in the example, two half-bridges 250, 251. The transverse gateway 25 connects, in active configuration, the two sides of the screen 1, thus the gateways 8A, 8B, this in a manner similar to the transverse gateway 13. The two half-gateways 250, 251 are particularly visible in FIGS. 7 and 8 Here they are identical, both in terms of their configurations and their dimensions. As a variant, they are not identical, for example they are of different lengths.
Aux différentes figures 5 à 7, une passerelle 25 ou une demi-passerelle 250 située à proximité de la face supérieure 6 du crible 1 est représentée. Elle est située dans le prolongement de la passerelle latérale 8A. Ainsi, comme cela apparaît à la figure 1 , la demi-passerelle transversale 251 est montée sur les glissières 15, 16. En variante, une ou plusieurs autres passerelles, similaires à la passerelle 25, sont prévues à des hauteurs inférieures, à savoir entre la face 6 et la passerelle 13. On conçoit que le nombre et/ou la position de la ou des passerelle(s) 25 est (sont) adaptée(s) aux dimensions et à la configuration géométrique du crible.  In the various FIGS. 5 to 7, a gateway 25 or a half gateway 250 located near the upper face 6 of the screen 1 is shown. It is located in the extension of the side bridge 8A. Thus, as shown in FIG. 1, the transverse half-bridge 251 is mounted on the slides 15, 16. In a variant, one or more other gateways, similar to the gateway 25, are provided at lower heights, namely between 6 and the bridge 13. It is understood that the number and / or the position of the gateway (s) 25 is (are) adapted (s) to the size and geometric configuration of the screen.
A la figure 5, la demi-passerelle 250 est en position dite inactive. On conçoit que les demi-passerelles 250 et 251 étant identiques, ce qui suit concerne également la demi-passerelle 251 . En effet la demi-passerelle 251 est ici identique, dans un miroir, à la demi-passerelle 250. Elle ne sera donc pas décrite plus précisément et il sera fait référence à la demi-passerelle 250.  In FIG. 5, the half-gateway 250 is in the so-called inactive position. It will be understood that the half-gateways 250 and 251 being identical, the following also relates to the half-gateway 251. Indeed, the half-gateway 251 is here identical, in a mirror, to the half gateway 250. It will therefore not be described more precisely and it will be referred to the half gateway 250.
Dans cette position, la demi-passerelle 250 forme une barrière de protection et empêche à un utilisateur, non seulement d'approcher de la partie haute 100 du crible 1 , mais également de chuter lorsqu'il est sur la plateforme terminale 120 de l'escalier 12. Pour cela, la demi-passerelle 250 comprend un treillis métallique 254 définissant un panneau vertical orienté vers l'autre demi-passerelle 251 . En variante non illustrée, la demi-passerelle est pleine ou ajourée, par exemple de type caillebotis. Des cadres métalliques 252, 253, perpendiculaires au panneau 254 et parallèles entre eux, complètent la demi-passerelle 250. Un cadre 252 est fixé par un de ses côtés sur un côté de la plate-forme 120 de l'escalier 12 et l'autre cadre 253 est fixé par un côté sur le panneau 254. En d'autres termes, la demi-passerelle 250 est sensiblement en forme de L. In this position, the half-gateway 250 forms a protective barrier and prevents a user not only to approach the upper part 100 of the screen 1, but also to drop when it is on the terminal platform 120 of the 12. For this, the half-gateway 250 comprises a wire mesh 254 defining a vertical panel facing the other half-gate 251. In a variant not shown, the half-bridge is full or perforated, for example grating type. Frames 252, 253, perpendicular to the panel 254 and parallel to each other, complete the half-bridge 250. A frame 252 is fixed by one of its sides on one side of the platform 120 of the stairs 12 and the other frame 253 is attached by one side to the panel 254. In other words, the half-bridge 250 is substantially L-shaped.
Dans la configuration inactive de la figure 5, les demi-passerelles 250, 251 définissent donc des rambardes formant un garde-corps solidaire de la plateforme terminale 120 de l'escalier 12. Dans un mode de réalisation avantageux, non illustré, des organes de verrouillage, connus en soi tels que des loquets, des goupilles, des serrures à clef ou à badge ou encore des mousquetons, assurent le blocage en position dite inactive des demi-passerelles 250, 251 , optimisant ainsi la sécurité.  In the inactive configuration of FIG. 5, the half-gangways 250, 251 thus define railings forming a railing integral with the end platform 120 of the staircase 12. In an advantageous embodiment, not illustrated, locking, known per se such as latches, pins, key locks or badge or carabiners, ensure the blocking said inactive position of the half-gateways 250, 251, thus optimizing security.
La figure 6 illustre le passage de la demi-passerelle 250 de la configuration inactive à une configuration dite active. Plus précisément, la figure 6 représente le début du mouvement effectué par la demi-passerelle 250 pour passer de la position inactive à la position active. Ce passage s'effectue, après déverrouillage des organes de verrouillage, par pivotement selon la flèche F4 d'un bord inférieur 255 du panneau 254 de la demi-passerelle 250 autour d'un axe de rotation parallèle à la plus grande longueur des glissières 15 ou 16. Ce pivotement peut être manuel, assisté ou entièrement motorisé, par exemple avec un vérin ou une crémaillère.  FIG. 6 illustrates the passage of the half gateway 250 from the inactive configuration to a so-called active configuration. More precisely, FIG. 6 represents the beginning of the movement made by the half-gateway 250 to go from the inactive position to the active position. This passage takes place, after unlocking the locking members, by pivoting according to the arrow F4 of a lower edge 255 of the panel 254 of the half-gateway 250 about an axis of rotation parallel to the longer length of the slides 15 or 16. This pivoting can be manual, assisted or fully motorized, for example with a jack or a rack.
Lors de ce mouvement, le pivotement du panneau 254 entraine automatique le pivotement du cadre 253 auquel il est fixé, cela alors que le cadre 252 reste en place, étant solidaire, par exemple par vissage ou soudage, de la plateforme 120.  During this movement, the pivoting of the panel 254 automatically causes the pivoting of the frame 253 to which it is attached, while the frame 252 remains in place, being secured, for example by screwing or welding, the platform 120.
Lorsque le panneau 254 a pivoté de 90° vers le bas, donc lorsqu'il est parallèle et sensiblement coplanaire à la plateforme 120, le mouvement de rotation du panneau 254 est stoppé par des organes d'arrêt 26. En l'espèce, il s'agit de deux coins 26, identiques, montés sur une face de la glissière 15 ou 16. En variante non illustré, il s'agit d'autres types d'organes d'arrêt, par exemple des plots en caoutchouc, une barre d'appui ou une chaîne.  When the panel 254 has rotated 90 ° downward, so when it is parallel and substantially coplanar with the platform 120, the rotational movement of the panel 254 is stopped by stop members 26. In this case, are two identical corners 26 mounted on one side of the slide 15 or 16. As a variant not shown, these are other types of stop members, for example rubber studs, a bar support or chain.
Dans cette configuration dite active de la demi-passerelle 250, les cadres 252, 253 sont coplanaires et dans le prolongement l'un de l'autre. Comme cela ressort de la figure 8, les deux demi-passerelles 250, 251 en configuration active ont leurs panneaux 254 respectifs coplanaires et situés dans le prolongement l'un de l'autre de manière à former la passerelle transversale 25 dont la longueur correspond sensiblement au double de la hauteur H254 d'un panneau 254, donc de facto sensiblement à la largeur L101 du crible 1 . Dans ce cas, les cadres 253, verticaux, des demi-passerelles 250, 251 sont aussi coplanaires et dans le prolongement l'un de l'autre, de façon à former une rambarde transversale perpendiculaire aux panneaux 254 des demi-passerelles 250, 251 . In this so-called active configuration of the half-gateway 250, the frames 252, 253 are coplanar and in the extension of one another. As is apparent from 8, the two half-bridges 250, 251 in active configuration have their respective panels 254 coplanar and located in the extension of one another so as to form the transverse bridge 25 whose length substantially corresponds to twice the H254 height of a panel 254, so de facto substantially to the width L101 of the screen 1. In this case, the vertical frames 253, half-gangways 250, 251 are also coplanar and in the extension of one another, so as to form a transverse rail perpendicular to the panels 254 of the half-bridges 250, 251 .
On note, en regardant notamment les figures 1 et 2, que le passage à la configuration active des demi-passerelles, donc le pivotement des panneaux 254 selon la flèche F4 ne peut avoir lieu que lorsque le capot 101 est ouvert, dégageant ainsi un espace suffisant pour la mise en place de la passerelle 25. De la sorte, lorsque le capot 101 est fermé, les demi-passerelles 250, 251 assurent la protection contre les chutes d'un utilisateur positionné sur la plateforme 120 de l'escalier.  It will be noted, with particular reference to FIGS. 1 and 2, that the transition to the active configuration of the half-gangways, therefore the pivoting of the panels 254 along the arrow F4, can take place only when the hood 101 is open, thus clearing a space sufficient to set up the gateway 25. In this way, when the cover 101 is closed, the half-gateways 250, 251 provide protection against falls of a user positioned on the platform 120 of the stairs.
En variante non représentée, si des demi-passerelles sont montées plus près de l'extrémité des glissières 15, 16 c'est-à-dire si elles s'étendent au-delà du crible 1 , alors il est possible d'assurer le passage à la configuration active, sans que le capot 101 gêne ce mouvement de mise en place de la passerelle lorsque le capot 101 est en position fermée. Il est alors possible de passer d'un côté à l'autre du crible, la passerelle transversale 25 reliant les passerelles latérales 8A, 8B, que le capot 101 soit ouvert ou fermé.  In variant not shown, if half-bridges are mounted closer to the end of the slideways 15, 16 that is to say if they extend beyond the sieve 1, then it is possible to ensure the transition to the active configuration, without the cover 101 hinders this positioning movement of the gateway when the cover 101 is in the closed position. It is then possible to go from one side to the other of the screen, the transverse gateway 25 connecting the side gateways 8A, 8B, the cover 101 is open or closed.
Néanmoins, dans ce cas, l'accès à l'intérieur du crible 1 lorsque le capot 101 est ouvert est moins aisé, du fait de l'éloignement des demi-passerelles par rapport au volume interne du crible. Pour remédier à cela, on peut monter les demi-passerelles sur des glissières de sorte que les demi-passerelles puissent être déplacées en translation pour se rapprocher ou s'éloigner du crible, selon que le capot 101 est ouvert ou non.  However, in this case, access to the interior of the screen 1 when the cover 101 is open is less easy, because of the distance of the half-gateways relative to the internal volume of the screen. To remedy this, the half-bridges can be mounted on slides so that the half-bridges can be moved in translation to move closer to or away from the screen, depending on whether the cover 101 is open or not.
Comme cela ressort particulièrement des figures 5 à 7, les cadres 253 assurent une protection contre les chutes, seulement du côté extérieur du crible. L'absence de cadre, donc de protection, du côté orienté vers l'intérieur du crible permet, en configuration ouverte du capot 101 , d'intervenir sur les grilles 271 , 272 du crible 1 , donc sur les grilles situées en partie haute du crible 1 . Cette intervention s'effectue non seulement en sécurité mais avec une ergonomie optimale, chaque utilisateur se trouvant à hauteur de travail, sans avoir à se baisser ou à monter en hauteur pour intervenir sur les grilles 270 à 272. As is particularly apparent from Figures 5 to 7, the frames 253 provide protection against falls, only the outer side of the screen. The absence of frame, therefore of protection, of the inward facing side of the screen allows, in open configuration of the cover 101, to intervene on the grids 271, 272 of the screen 1, so on the grids located in the upper part of the screen 1. This intervention is not only safe but with optimal ergonomics, each user is at working height, without having to bend or climb in height to intervene on the grids 270 to 272.
Dans d'autres modes de réalisation, chaque demi-passerelle 250, 251 est formée de plusieurs parties, mobiles entre elles, par exemple par emmanchement télescopique, ce qui permet un allongement de chaque panneau 254 en configuration active par rapport à la configuration inactive, définissant ainsi une passerelle de grande longueur.  In other embodiments, each half-bridge 250, 251 is formed of several parts, movable together, for example by telescopic fitting, which allows an elongation of each panel 254 in active configuration with respect to the inactive configuration, thus defining a bridge of great length.
En variante, au moins une demi-passerelle 250 ou 251 est pourvue d'un double plancher coulissant sur des glissières. En d'autres termes, la plateforme 120 comprend une base fixe et une partie mobile en translation, ce qui permet, par allongement télescopique, de former une passerelle 25 de grande longueur, étant entendu que le mouvement et les dimensions des panneaux 254 sont identiques à ceux décrits ci-dessus.  In a variant, at least one half-gangway 250 or 251 is provided with a double floor sliding on runners. In other words, the platform 120 comprises a fixed base and a moving part in translation, which allows, by telescopic extension, to form a bridge 25 of great length, it being understood that the movement and the dimensions of the panels 254 are identical to those described above.

Claims

REVENDICATIONS
1 . - Crible (1 ) à plans vibrants dit crible à tiroirs, comprenant au moins deux tamis dits grilles (270, 271 , 272), une première partie fixe (100), recevant lesdites grilles1. - Screen (1) with vibrating planes, said screen with drawers, comprising at least two sieves called grids (270, 271, 272), a first fixed part (100), receiving said grids
(270, 271 , 272) et pourvue d'une ouverture, une seconde partie (101 ) dite capot, mobile en translation (F3) entre une première position d'obturation de l'ouverture de la première partie et une seconde position d'ouverture autorisant l'accès aux grilles, caractérisé en ce qu'il comprend une première passerelle transversale (13), fixe, située en partie basse du crible (1 ) et adaptée pour assurer l'accès à une première grille (270) située en partie basse du crible lorsque la partie dite capot (101 ) est en configuration ouverte et pour assurer seulement le passage d'un côté à l'autre (8A, 8B ; 9A, 9B) du crible (1 ) lorsque la partie dite capot (101 ) est en configuration fermée et en ce qu'il comprend au moins une seconde passerelle transversale (25) mobile entre une première position dite inactive où elle interdit l'accès à au moins une seconde grille (271 , 272) situé au-dessus de la première grille (270) lorsque la partie dite capot (101 ) est en configuration fermée et une seconde position dite active dans laquelle la seconde passerelle (25) définit un chemin d'accès à au moins une seconde grille (271 , 272) située au-dessus de la première grille (270) lorsque la partie dite capot (101 ) est en configuration ouverte, ladite seconde passerelle transversale (25) définissant également, en position dite active, un passage d'un côté à l'autre (8A, 8B ; 9A, 9B) du crible, au-dessus de la première passerelle transversale (13). (270, 271, 272) and provided with an opening, a second part (101) called cover, movable in translation (F3) between a first closed position of the opening of the first part and a second position of opening allowing access to the grids, characterized in that it comprises a first transverse gangway (13), fixed, located in the lower part of the screen (1) and adapted to ensure access to a first grid (270) located in lower part of the sieve when the so-called bonnet part (101) is in the open configuration and to ensure only the passage from one side to the other (8A, 8B; 9A, 9B) of the sieve (1) when the so-called bonnet part ( 101) is in a closed configuration and in that it comprises at least one second transverse bridge (25) movable between a first so-called inactive position where it prohibits access to at least one second grid (271, 272) situated above of the first gate (270) when the part called hood (101) is in configuration closed and a second so-called active position in which the second gateway (25) defines a path to at least one second gate (271, 272) located above the first gate (270) when the so-called bonnet part (101) ) is in open configuration, said second transverse bridge (25) also defining, in the so-called active position, a passage from one side to the other (8A, 8B; 9A, 9B) of the screen, above the first transverse bridge (13).
2. - Crible selon la revendication 1 , caractérisé en ce que la première passerelle transversale (13) est configurée en V, la pointe (130) étant orientée vers le haut.  2. - Screen according to claim 1, characterized in that the first transverse bridge (13) is configured in V, the tip (130) being oriented upwards.
3.- Crible selon la revendication 2, caractérisé en ce que la première passerelle transversale (13) est pourvue d'une rambarde (14) mobile en translation selon le déplacement (F3) du capot (101 ) du crible, ladite rambarde (14) étant fixée sur ledit capot (101 ).  3. Screen according to claim 2, characterized in that the first transverse gangway (13) is provided with a rail (14) movable in translation according to the displacement (F3) of the hood (101) of the screen, said railing (14). ) being fixed on said cover (101).
4.- Crible selon une des revendications précédentes, caractérisé en ce qu'en position ouverte du capot (101 ), une partie de ce dernier définit une rambarde de protection de la première passerelle transversale (13). 4. Screen according to one of the preceding claims, characterized in that in the open position of the cover (101), a part of the latter defines a guardrail of protection of the first transverse bridge (13).
5. - Crible selon la revendication 1 , caractérisé en ce que la seconde passerelle transversale (25) est formée de deux demi-passerelles (250, 251 ).  5. - Screen according to claim 1, characterized in that the second transverse bridge (25) is formed of two half-bridges (250, 251).
6. - Crible selon la revendication 5, caractérisé en ce qu'au moins une des demi-passerelles (250 ou 251 ) comporte un panneau (254) formant, en configuration inactive, une rambarde et, en configuration active, définissant, au moins en partie, un passage d'un côté à l'autre (8A, 8B ; 9A, 9B) du crible (1 ) orienté selon la largeur (H254) du crible (1 ).  6. - Screen according to claim 5, characterized in that at least one of the half-gateways (250 or 251) comprises a panel (254) forming, in an inactive configuration, a guardrail and, in active configuration, defining, at least in part, a side-to-side passage (8A, 8B; 9A, 9B) of the screen (1) oriented along the width (H254) of the screen (1).
7. - Crible selon la revendication 6, caractérisé en ce que chaque demi-passerelle (250, 251 ) est pourvue d'un panneau (254) définissant en configuration active un passage d'un côté à l'autre, les panneaux (254) de chaque demi-passerelle (250, 251 ) étant adaptés pour, en configuration active, être coplanaires dans le prolongement l'un de l'autre et ainsi définir une passerelle (25) assurant le passage d'un côté à l'autre (8A, 8B ; 9A, 9B) du crible (1 ).  7. - Screen according to claim 6, characterized in that each half-bridge (250, 251) is provided with a panel (254) defining in active configuration a passage from one side to the other, the panels (254). ) of each half-bridge (250, 251) being adapted, in active configuration, to be coplanar in the extension of one another and thus define a bridge (25) ensuring the passage from one side to the other (8A, 8B, 9A, 9B) of the screen (1).
8.- Crible selon l'une des revendications 4 à 6, caractérisé en ce que chaque demi-passerelle (250, 251 ) passe de la configuration inactive à la configuration active par pivotement (F4) d'un bord (255) du panneau (254) autour d'un axe de rotation parallèle à des glissières (15, 16) assurant le mouvement de translation (F3) du capot (101 ).  8. Screen according to one of claims 4 to 6, characterized in that each half-bridge (250, 251) goes from the inactive configuration to the active configuration by pivoting (F4) of an edge (255) of the panel (254) about an axis of rotation parallel to slides (15, 16) ensuring the translation movement (F3) of the cover (101).
9.- Crible selon la revendication 7, caractérisé en ce que chaque demi-passerelle (250, 251 ) est maintenue en position active par au moins un organe d'arrêt (26).  9. A screen according to claim 7, characterized in that each half-bridge (250, 251) is held in the active position by at least one stop member (26).
EP15823723.0A 2015-01-08 2015-12-28 Vibrating-screen sieve referred to as a tray sieve Withdrawn EP3242752A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1550130A FR3031465B1 (en) 2015-01-08 2015-01-08 VIBRANT PLYWALL SCREEN DRIVES WITH DRAWERS
PCT/FR2015/053759 WO2016110629A1 (en) 2015-01-08 2015-12-28 Vibrating-screen sieve referred to as a tray sieve

Publications (1)

Publication Number Publication Date
EP3242752A1 true EP3242752A1 (en) 2017-11-15

Family

ID=52779862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15823723.0A Withdrawn EP3242752A1 (en) 2015-01-08 2015-12-28 Vibrating-screen sieve referred to as a tray sieve

Country Status (3)

Country Link
EP (1) EP3242752A1 (en)
FR (1) FR3031465B1 (en)
WO (1) WO2016110629A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107989376B (en) * 2017-12-26 2023-08-25 三一汽车制造有限公司 Screen and hopper

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6540089B2 (en) * 2001-04-17 2003-04-01 Astec Industries Inc. Large, stationary, modular aggregate processing plant and method of manufacturing and installing same

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2016110629A1 *

Also Published As

Publication number Publication date
WO2016110629A1 (en) 2016-07-14
FR3031465A1 (en) 2016-07-15
FR3031465B1 (en) 2018-10-19

Similar Documents

Publication Publication Date Title
EP3450363B1 (en) Secure dock for unloading waste from a vehicle in a storage centre
FR2988707A1 (en) BURBED POUBELLE WITH MOBILE BARRIER.
WO2012014144A1 (en) Folding lateral extension adjoining at least one loading surface of a cargo-carrying vehicle
FR3018052A1 (en) WORKING MACHINE, IN PARTICULAR TRUCK
EP3061891B1 (en) Discharging mechanism for a concrete bucket comprising a receptacle for the leakage of the laitance
EP3308866B1 (en) Hopper comprising a screen with converging slopes
FR2917110A1 (en) DEVICE FOR PROTECTING AN OPENING
EP3242752A1 (en) Vibrating-screen sieve referred to as a tray sieve
FR3016379A1 (en) FORMWORK BANK WITH INTEGRATED STAIRCASE.
FR2972755A1 (en) Secure access device for providing access to cistern towed by vehicle, has footbridge secured to actuating units actuated from ground for folding up and folding back footbridge on container or deploying footbridge to project from container
FR3037344B1 (en) BUCKET FOR A VEHICLE FOR LOADING, MOVING, TRANSPORTING, FLYING AND SPREADING BULK MATERIAL
EP3509798B1 (en) Portable building-site workbench
EP2907772A1 (en) Safe loading device for waste reception centre
CH686128A5 (en) Transport vehicle loading/unloading ramp
FR3029187A1 (en) DEVICE FOR LOADING WASTE BINS FROM A PLATFORM
FR3033321B1 (en) CONVEYOR FOR TRANSPORTING ARTICLES ALONG A CONVEYING ROUTE
EP2492218B1 (en) Container for a waste disposal facility or similar
FR3024442A1 (en) DEVICE FOR SECURING A WASTE TANK INTENDED TO BE CHARGED WITH WASTE FROM A PLATFORM
FR3137314A1 (en) Supply system of a plant shredder
EP2112299B1 (en) Method of assembling a vehicle and equipment for the implementation thereof
FR2929973A1 (en) SAFETY DEVICE FOR HOPPER
FR3048897A1 (en) METHOD AND INSTALLATION FOR PROCESSING PANEL OR PLATE
FR3049909A1 (en) DUMP TRUCK
FR2467632A1 (en) Crusher for bottle recycling - has revolving paddle in chute fitted over hood with foam rubber lining and mounted on wheels
EP4299401A1 (en) Station of a cable transport system and method for maintaining a station

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20170615

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20180625

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20181106