EP3439802A1 - Device for conveying and retaining a glass sheet, particularly in a washing facility - Google Patents

Device for conveying and retaining a glass sheet, particularly in a washing facility

Info

Publication number
EP3439802A1
EP3439802A1 EP17720551.5A EP17720551A EP3439802A1 EP 3439802 A1 EP3439802 A1 EP 3439802A1 EP 17720551 A EP17720551 A EP 17720551A EP 3439802 A1 EP3439802 A1 EP 3439802A1
Authority
EP
European Patent Office
Prior art keywords
glass sheet
conveying
holding
glass
contact
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Withdrawn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
EP17720551.5A
Other languages
German (de)
French (fr)
Inventor
Vincent Sauvinet
Thierry Olivier
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.)
Saint Gobain Glass France SAS
Original Assignee
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint Gobain Glass France SAS, Compagnie de Saint Gobain SA filed Critical Saint Gobain Glass France SAS
Publication of EP3439802A1 publication Critical patent/EP3439802A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B11/00—Cleaning flexible or delicate articles by methods or apparatus specially adapted thereto
    • B08B11/04—Cleaning flexible or delicate articles by methods or apparatus specially adapted thereto specially adapted for plate glass, e.g. prior to manufacture of windshields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B11/00—Cleaning flexible or delicate articles by methods or apparatus specially adapted thereto
    • B08B11/02—Devices for holding articles during cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
    • B65G49/05—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
    • B65G49/06—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
    • B65G49/063—Transporting devices for sheet glass
    • B65G49/064—Transporting devices for sheet glass in a horizontal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
    • B65G49/05—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
    • B65G49/06—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
    • B65G49/063—Transporting devices for sheet glass
    • B65G49/064—Transporting devices for sheet glass in a horizontal position
    • B65G49/065—Transporting devices for sheet glass in a horizontal position supported partially or completely on fluid cushions, e.g. a gas cushion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
    • H01L21/67703—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations between different workstations
    • H01L21/67709—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations between different workstations using magnetic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
    • H01L21/67784—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations using air tracks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/02—Articles
    • B65G2201/0214—Articles of special size, shape or weigh

Definitions

  • the invention relates to a conveying and holding device for glass sheets, in particular in a horizontal position, and a washing installation for glass sheets comprising such a device.
  • the invention will be more particularly described with regard to a maintenance application during the washing and drying of a glass sheet intended to be conveyed through the washing and drying installation, without being limited thereto. It could apply to any application requiring the maintenance of a sheet of glass to be conveyed, in particular in (substantially) horizontal position, before its integration into its final destination of use.
  • the invention applies more particularly to a curved glass sheet, in particular for automotive application, and very thin, less than 1, 2 mm, or even less than 1, 1 mm, without being limited thereto . It can be applied to any flat glass sheet or not, and for other types of vehicles or even other applications.
  • Today, reducing the weight of motor vehicles is a path developed by manufacturers to reduce the consumption of fossil fuels from vehicles and therefore reduce greenhouse gas (CO 2 ) emissions.
  • glazing is part of the components that are sought to lighten. Lowering the weight of a glazing involves reducing the thickness of the glass.
  • it is now proposed glazing including windshields whose inner glass sheet has a thickness less than 1, 2 mm or even less than 1.1 mm, such as 0.7 mm, or 0.55 mm, or 0.4 mm or 0.3 mm.
  • the pair of curved glass sheets to be sandwiched with a transparent plastic film is imperatively washed to avoid the presence of dust that might otherwise d be trapped in the lamination, causing visible defects that would not be acceptable in view of the quality imposed in the automotive field, and lead to the scrapping of the glazing.
  • the cleaning of the curved glass sheets is usually carried out in washing tunnels, the glass sheets running one after the other on a conveying device provided with two parallel and spaced belts, being placed on said belts by their slices. , in four points if the glass sheet is symmetrical, or in three points if its contour is asymmetrical.
  • the washing and drying are carried out on the entire surface of the two opposite faces of the glass sheet and on the periphery of the latter, by projecting jets of water under pressure and then pressurized air jets, the positioning on the edge of the glass sheets to clean the entire surface and the periphery of the glass sheets.
  • the adjustments of water and air pressures and the alignment of the nozzles do not make it possible to obtain satisfactory stability and shock suppression for glass sheets with a very small thickness of less than 1.2 mm.
  • the breaking of glass sheets is too important.
  • the invention therefore aims to provide a device for conveying and maintaining a glass sheet, which obviates the aforementioned drawbacks by allowing to firmly hold the glass sheet during its conveying, and in the intended application, when its washing, while ensuring an optimal washing of the surface of both sides of the glass sheet, including the periphery of the glass sheet.
  • the device for conveying and holding a glass sheet comprises conveying means and holding means for holding a glass sheet in position, in particular in (substantially) horizontal position, and is characterized in that the conveying means comprise at least two parallel spaced conveying systems, said lateral conveying systems, extending longitudinally (in the conveying direction), and intended to be arranged to support the lateral sides of the glass sheet and the holding means comprise at least one holding system placed above the lateral conveying systems and above the glass sheet, and intended to limit the range of motion of the glass sheet.
  • the holding means comprise at least two holding systems placed above and facing the lateral conveying systems, and intended to be above the glass sheet to limit the amplitude of the movements of the sheet. glass.
  • the lateral support systems can also be called upper holding systems.
  • the conveying means further comprise at least one central conveying system, preferably two parallel and spaced central conveyor systems, positioned between the lateral conveying conveyors, the glass sheet being intended to face the central conveyors at the end. level of its central part.
  • the two lateral conveyor systems are arranged to be on both sides and away from the central conveyor but close enough so that all or part of the lateral sides of the glass sheet overflows from these side conveyors.
  • the conveying systems and the central systems are driven at the same speed.
  • the holding systems are not fixed, they are also driven at the same speed.
  • lateral sides of the glass sheet are meant the sides parallel to the direction of travel or conveying of the glass sheet, and on the upstream and downstream sides, the two opposite and substantially perpendicular sides to the lateral sides, the upstream and the downstream in relation to the direction of scrolling
  • Lateral conveyor systems are intended to laterally support the glass sheet which, because of its shape, rests at least one point of its peripheral edge on each side conveyor. Of With its own weight and flexibility, the glass often deforms sufficiently for this support to take place in two points.
  • the lateral holding systems are intended to block the lifting of the glass sheet when, under the effect of the jets of water or pressurized air, the latter is lifted from the lateral conveyors.
  • the glass sheet is supported by its periphery at one or two points on the lateral conveyors.
  • the glass sheet is intended to be supported by the central conveyor (s) and the lateral conveying systems on which its peripheral edge rests punctually. It is blocked or limited in movement relative to its position on these transport conveyors thanks to the upper holding systems which either limit its movement by being positioned 5 to 25 mm above the sheet of glass so without touching it, either block its movement if said sheet touches them.
  • the glass sheet intended to be conveyed and which can if necessary rest by its edge at its upstream and downstream sides on a usual central conveying system, is blocked or limited in the amplitude of its vertical movements. on the one hand downwards by the fact that it rests on the lateral conveying conveyors and on the other hand upwards by each of the holding systems positioned above each respective lateral conveyor.
  • the maintenance systems not touching or punctually the glass, they allow a washing of the entire surface of the glass sheet.
  • the device of the invention for conveying and holding a glass sheet guarantees: a stabilization of the transport for all sheets of glass and whatever the geometry of the contour of said sheet;
  • the terms “horizontal”, “vertical”, “upper”, “lower”, “high”, “low”, are qualified by qualifying the elements of the device or a sheet of glass when the device rests fixedly on a horizontal plane and that the glass sheet is associated with it also extending horizontally.
  • the term "height" for qualifying an element of the device means according to the vertical dimension, that is to say in a direction perpendicular to the horizontal plane containing the device.
  • lateral refers to a transverse direction (perpendicular) to the longitudinal direction of conveying, that is to say, scroll glass sheets.
  • each holding system is a belt with a width of 10 to 100 mm and advantageously of 20 to 50 mm or a wire stretched over the glass sheet with a diameter of 5 to 50 mm and preferably from 10 to 10 mm. 30 mm and that moves with said glass sheet without this displacement being obligatory in the case where the belt or the wire does not touch the sheet of glass.
  • the or each holding system is fixed and is not in contact with the sheet.
  • the or each holding system moves at the speed of the glass sheet and is in contact with the glass sheet at points of contact or contact lines.
  • the or each holding system is advantageously a belt on which are distributed protrusions limiting the contact with the glass sheet at contact points.
  • a belt in the case of a belt, it may be covered with small protuberances shaped cone, half-sphere or pyramid to limit the contact between the belt and the glass sheet at a point of contact.
  • the or each holding system is a wire limiting the contact with the glass sheet to contact lines.
  • this one will be smooth and its diameter being weak, the contact of the wire and the sheet of glass will be limited to a line of contact whose position will oscillate under the jets of air and water allowing a cleaning of the whole surface.
  • the wire has a diameter of between 5 and 50 mm, particularly between 10 and 30 mm.
  • contact point means a contact surface of at most a few mm 2 , in particular at most 25 mm 2 .
  • contact line means a contact surface having a width of at most 3 mm.
  • the length of the line depends on the curve of the glass sheet but is generally of the order of 50 mm.
  • the or each holding system is intended to generate a local contact with the glass, such as in the form of at least one contact point or at least one contact line, preferably the contact surface is 25 mm 2 or the nip has a width of at most 3 mm.
  • the protuberances on the holding belt are evenly distributed so that there is no possible contact between the glass sheet and the belt.
  • the protuberances have a height of between 5 and 50 mm, preferably between 10 and 30 mm, and the protuberances are spaced apart by a distance of less than ten times their height, preferably less than five times their height.
  • the lateral conveying systems and the holding systems are adjustable laterally and vertically to adapt to the size and shape of the series of glass sheets to be washed. Consequently, by adjusting the position of the lateral conveyors and holding systems, the same device of the invention is usable whatever the dimensions and the curve of the glass sheets.
  • the holding systems have contact surfaces such as protuberances which are made of a plastic material, of the polymer type, which does not risk causing scratches on the glass, for example having a Shore D hardness of less than 90, and sufficiently flexible, for example flexible rubber, or in particular Shore A hardness between 20 and 80, to adapt to the local shape of glass without exerting too much reaction force on the glass.
  • the invention also relates to an assembly comprising at least one central conveying system, two lateral conveying systems and two associated holding systems remote in the direction transverse to the conveying, characterized in that the lateral conveying are arranged on either side of the central conveying device, the central conveying device and the lateral conveying systems being driven at the same speed.
  • the invention relates to a washing and drying installation comprising the aforementioned assembly or at least one conveying and holding device of the invention, in particular for cleaning glass sheets, in particular curved sheets, for glazing of vehicles such as windshield type.
  • the method of implementation of the device of the invention is as follows, a central conveying device being generally existing
  • the position (in a horizontal plane) and the height of the lateral conveyor systems and holding systems is set to the stop position of the device; -
  • the glass sheet or sheets are fed by automated means over the conveying and holding device to be housed on the side conveyors and possibly the central conveying system;
  • each sheet of glass is deposited on the central conveying device at least at four points of support along the curve by its upstream and downstream edges, the concave face for a curved glass sheet being turned facing the conveyor (downwards); );
  • FIG. 1 shows, in a washing installation, a schematic sectional view of the conveying device and maintenance of the invention according to a first embodiment in the holding position of a glass sheet, the sectional view being transverse relative to the longitudinal conveying direction and located in a vertical plane passing through the point of contact of the glass sheet with the holding systems;
  • Figure 2 is a schematic top view of the conveying device and maintaining the invention of Figure 1;
  • FIG. 3 shows, in a washing installation, a schematic sectional view of the conveying device and maintenance of the invention according to a second embodiment in the holding position of a glass sheet, the sectional view being transverse with respect to the longitudinal conveying direction and situated in a vertical plane passing through the point of contact of the glass sheet, the holding systems being wires;
  • FIG. 4 is a schematic view from above of the conveying and holding device of the invention of FIG. 3.
  • the device 1 for conveying and holding the invention illustrated in FIGS. 1 and 2 or 3 and 4 is intended to hold a glass sheet 2 in a substantially horizontal plane, to convey it or to participate in its conveying according to a direction F, and maintain it in position without amplitude effect or at least minimizing these effects of amplitudes, when subjected to strong vibrations on both sides, in particular by water pressure jets and air.
  • FIG. 1 is intended to hold a glass sheet 2 in a substantially horizontal plane, to convey it or to participate in its conveying according to a direction F, and maintain it in position without amplitude effect or at least minimizing these effects of amplitudes, when subjected to strong vibrations on both sides, in particular by water pressure jets and air.
  • FIG. 1 is a diagrammatic cross-sectional view of a conveying and air-blowing installation 3 comprising the conveying and holding device 1 of a glass sheet 2, comprising two parallel lateral conveying systems 10A and 10B, and spaced arranged laterally to the glass sheet 2, and preferably a central conveyor 4 comprising two drive belts 40 and 41, and positioned between the two lateral conveying systems 10A and 10B, as well as water pressure jets or of air symbolized by the arrows F1 and F2 directed vertically respectively upwardly and downwardly.
  • the device comprises holding systems 1 1 A and 1 1 B intended to block the lifting of the glass sheet when, under the effect of jets of water or air under pressure, it is lifted from the side conveyors 10A and 10B.
  • the glass sheet 2 has two opposite lower and upper faces 21 extending horizontally, the lower face 20 is facing downwards.
  • the glass sheet has two opposite lateral sides 22A and 22B, parallel to the direction of travel, and two other sides said upstream 23A and downstream 23B, transverse to the lateral sides.
  • the conveying is done according to the arrow F ( Figure 2).
  • the glass sheet 2 rests horizontally on the drive belts 40 and 41 by its edge at its upstream sides 23A and downstream 23B (at least in four points along its curve).
  • the conveying and holding device 1 ensures, via the holding systems 1 1 A and 1 1 B, the maintenance of the glass sheet 2 in this horizontal plane perpendicular to the jets.
  • the glass sheet 2 is in the example represented curved, the lower face 20 corresponding to the concave face 20.
  • the concavity of the glass sheet is thus turned downwards, that is to say facing the central conveyor 4.
  • the glass sheet 2 thus rests in its median part via its lower face 20 on the central conveyor 4.
  • the lateral conveying systems are intended to support laterally the glass sheet which, because of its curve, rests in at least one point from its peripheral edge on each side conveyor. In practice, because of its own weight and its flexibility, the glass deforms often enough for this support to take place at two points upstream and downstream on each side conveyor.
  • the conveyor systems 10A and 10B with their holding systems 11A and 11B are positioned by adjusting the holding elements before the start of production (washing of glass sheets) in order to support the shapes of glass sheets (usually for windshield) future production.
  • the holding systems 1 1 A and 1 1 B are adapted to be adjusted in position in a horizontal plane and perpendicular to the scroll axis of the glass sheet.
  • the holding systems 1 1 1 A and 1 1 B are for example belts.
  • the holding systems (such as the belts) comprise protuberances 12 which constitute points of contact (localized) with the glass when the glass sheet touches said holding systems.
  • the material of the holding elements (protuberances) applied against the glass is adapted to prevent the creation of break primers when the glass undergoes vibrations due to washing and drying.
  • the protuberances which are made of a plastic material, of the polymer type, not likely to cause scratches on the glass, for example of Shore D hardness less than 90, and sufficiently flexible, for example of flexible rubber, or especially of Shore A hardness between 20 and 80, to adapt to the local shape of glass without exerting too much reaction force on the glass.
  • the protuberances on the holding belt are evenly distributed so that there is no possible contact between the glass sheet and the belt.
  • the protuberances have a height of between 5 and 50 mm, preferably between 10 and 30 mm, and the protuberances are spaced apart by a distance of less than ten times their height, preferably less than five times their height.
  • the protrusions 12 are for example derived from notched surfaces or corrugations providing an alternation of ribs (the protuberances) and alternating hollow parallel.
  • the protuberances may have various geometries, such as pyramids whose head is truncated or not, spheres or half-spheres, or other.
  • Figures 3 and 4 correspond to an alternative embodiment of Figures 1 and 2.
  • the holding systems are here the son of 13A and 13B.
  • the wires 13A and 13B limit contact with the glass sheet to nips.
  • a wire it will be smooth and its diameter being small, the contact of the wire and the sheet of glass will be limited to a line of contact whose position will oscillate under the jets of air and water allowing a cleaning of the whole surface.
  • the wire has a diameter of between 5 and 50 mm, particularly between 10 and 30 mm.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Cleaning In General (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Intermediate Stations On Conveyors (AREA)
  • Chain Conveyers (AREA)

Abstract

The invention relates to a device (1) for conveying and retaining a glass sheet (2), comprising conveying and retaining means for retaining a glass sheet in position, in particular in a horizontal position, characterised in that the conveying means comprise at least two parallel conveyor systems (10A, 10B), known as the lateral conveyor systems, spaced apart from one another, extending longitudinally in the conveying direction and intended to be arranged so as to support the lateral sides of the glass sheet, and the retaining means comprise at least one retaining system (11A, 11B) placed above the lateral conveyor systems (10A, 10B) and above the glass sheet and intended to limit the range of movement of the glass sheet.

Description

DISPOSITIF DE CONVOYAGE ET DE MAINTIEN POUR FEUILLE DE VERRE NOTAMMENT DANS UNE INSTALLATION DE LAVAGE  CONVEYING AND HOLDING DEVICE FOR GLASS SHEET IN PARTICULAR IN A WASHING PLANT
L'invention concerne un dispositif de convoyage et de maintien pour feuille de verre, en particulier en position horizontale, ainsi qu'une installation de lavage pour feuilles de verre comprenant un tel dispositif. The invention relates to a conveying and holding device for glass sheets, in particular in a horizontal position, and a washing installation for glass sheets comprising such a device.
L'invention sera plus particulièrement décrite en regard d'une application de maintien lors du lavage et séchage d'une feuille de verre destinée à être convoyée au travers de l'installation de lavage et séchage, sans toutefois y être limitée. Elle pourrait s'appliquer à toute application nécessitant de maintenir une feuille de verre devant être convoyée, en particulier en position (sensiblement) horizontale, avant son intégration dans sa destination finale d'utilisation. The invention will be more particularly described with regard to a maintenance application during the washing and drying of a glass sheet intended to be conveyed through the washing and drying installation, without being limited thereto. It could apply to any application requiring the maintenance of a sheet of glass to be conveyed, in particular in (substantially) horizontal position, before its integration into its final destination of use.
L'invention s'applique plus particulièrement à une feuille de verre bombée, en particulier pour l'application automobile, et de très faible épaisseur, de moins de 1 ,2 mm, voire moins de 1 ,1 mm, sans toutefois y être limitée. Elle peut s'appliquer à toute feuille de verre plane ou non, et pour autres types de véhicules ou même autres applications. Aujourd'hui, la réduction du poids des véhicules automobiles est une voie développée par les constructeurs afin notamment de réduire la consommation des carburants d'origine fossile des véhicules et par conséquent réduire les émissions de gaz à effets de serre (CO2). Parmi tous les éléments constitutifs d'un véhicule, les vitrages font partie des composants que l'on cherche à alléger. L'abaissement du poids d'un vitrage passe par la diminution de l'épaisseur du verre. Aussi, il est à présent proposé des vitrages, notamment des pare-brises dont la feuille de verre intérieure présente une épaisseur inférieure à 1 ,2 mm ou même inférieure à 1 ,1 mm, telle que 0,7 mm, ou 0,55 mm, ou encore 0,4 mm ou 0,3 mm. The invention applies more particularly to a curved glass sheet, in particular for automotive application, and very thin, less than 1, 2 mm, or even less than 1, 1 mm, without being limited thereto . It can be applied to any flat glass sheet or not, and for other types of vehicles or even other applications. Today, reducing the weight of motor vehicles is a path developed by manufacturers to reduce the consumption of fossil fuels from vehicles and therefore reduce greenhouse gas (CO 2 ) emissions. Among all the components of a vehicle, glazing is part of the components that are sought to lighten. Lowering the weight of a glazing involves reducing the thickness of the glass. Also, it is now proposed glazing, including windshields whose inner glass sheet has a thickness less than 1, 2 mm or even less than 1.1 mm, such as 0.7 mm, or 0.55 mm, or 0.4 mm or 0.3 mm.
Lors de la fabrication d'un vitrage feuilleté, tel qu'un vitrage automobile, la paire de feuilles de verre bombées à assembler en sandwich avec un film de matière plastique transparent, subit impérativement un lavage pour éviter la présence de poussières qui risqueraient sinon d'être emprisonnées dans le feuilletage, engendrant des défauts visibles qui ne seraient pas admissibles au regard de la qualité imposée dans le domaine de l'automobile, et conduiraient à la mise au rebut du vitrage. Le nettoyage des feuilles de verre bombées est usuellement réalisé dans des tunnels de lavage, les feuilles de verre cheminant les unes à la suite des autres sur un dispositif de convoyage doté de deux courroies parallèles et espacées, en étant posées sur lesdites courroies par leur tranche, en quatre points si la feuille de verre est symétrique, ou en trois points si son contour est asymétrique. Le lavage et le séchage sont effectués sur la totalité de la surface des deux faces opposées de la feuille de verre et sur la périphérie de cette dernière, en projetant des jets d'eau sous pression puis des jets d'air sous pression, le positionnement sur le chant des feuilles de verre permettant de nettoyer l'ensemble de la surface et la périphérie des feuilles de verre. During the manufacture of a laminated glazing, such as automotive glazing, the pair of curved glass sheets to be sandwiched with a transparent plastic film, is imperatively washed to avoid the presence of dust that might otherwise d be trapped in the lamination, causing visible defects that would not be acceptable in view of the quality imposed in the automotive field, and lead to the scrapping of the glazing. The cleaning of the curved glass sheets is usually carried out in washing tunnels, the glass sheets running one after the other on a conveying device provided with two parallel and spaced belts, being placed on said belts by their slices. , in four points if the glass sheet is symmetrical, or in three points if its contour is asymmetrical. The washing and drying are carried out on the entire surface of the two opposite faces of the glass sheet and on the periphery of the latter, by projecting jets of water under pressure and then pressurized air jets, the positioning on the edge of the glass sheets to clean the entire surface and the periphery of the glass sheets.
Cependant, les feuilles de verre d'épaisseur de l'ordre de 1 ,4 mm ou moins soumises à la pression des jets d'eau et d'air vibrent et se déforment, l'amplitude des vibrations étant considérablement augmentée lorsque l'épaisseur du verre diminue. En effet, l'amplitude de vibration augmente autant que la résistance à la flexion de la feuille de verre diminue, selon le cube de l'épaisseur de la feuille de verre. Ainsi, des vibrations d'amplitude de l'ordre de 20 mm sont observées sous les jets d'air de séchage pour une feuille de verre d'épaisseur 1 ,4 mm, et atteignent respectivement 40 mm, et même 160 mm pour des verres d'épaisseurs respectives 1 ,1 mm et 0,7 mm. Les vibrations engendrent des chocs du verre contre les buses de soufflage ainsi que des chocs importants de la tranche du verre reposant sur les courroies de transport induisant des amorces de ruptures, et la casse des feuilles de verre. However, glass sheets with a thickness of about 1.4 mm or less subjected to the pressure of the jets of water and air vibrate and deform, the amplitude of the vibrations being considerably increased when the thickness glass decreases. Indeed, the amplitude of vibration increases as the bending strength of the glass sheet decreases, according to the cube of the thickness of the glass sheet. Thus, amplitude vibrations of the order of 20 mm are observed under the drying air jets for a glass sheet of thickness 1, 4 mm, and reach respectively 40 mm, and even 160 mm for glasses of respective thicknesses 1, 1 mm and 0.7 mm. The vibrations cause shocks of the glass against the blowing nozzles as well as significant shocks of the edge of the glass resting on the conveyor belts inducing break primers, and the breaking of the glass sheets.
Les réglages de pressions d'eau et d'air ainsi que l'alignement des buses ne permettent pas d'obtenir une stabilité satisfaisante et la suppression des chocs pour des feuilles de verre de très faible épaisseur, inférieure à 1 ,2 mm. La casse des feuilles de verre est trop importante. L'invention a donc pour but de proposer un dispositif de convoyage et de maintien d'une feuille de verre, qui obvie aux inconvénients précités en permettant de maintenir fermement la feuille de verre lors de son convoyage, et dans l'application visée, lors de son lavage, tout en garantissant un lavage optimal de la surface des deux faces de la feuille de verre, y compris à la périphérie de la feuille de verre. The adjustments of water and air pressures and the alignment of the nozzles do not make it possible to obtain satisfactory stability and shock suppression for glass sheets with a very small thickness of less than 1.2 mm. The breaking of glass sheets is too important. The invention therefore aims to provide a device for conveying and maintaining a glass sheet, which obviates the aforementioned drawbacks by allowing to firmly hold the glass sheet during its conveying, and in the intended application, when its washing, while ensuring an optimal washing of the surface of both sides of the glass sheet, including the periphery of the glass sheet.
Selon l'invention, le dispositif de convoyage et de maintien d'une feuille de verre comporte des moyens de convoyage et des moyens de maintien destinés à maintenir en position une feuille de verre, notamment en position (sensiblement) horizontale, et est caractérisé en ce que les moyens de convoyage comporte au moins deux systèmes de convoyage espacés et parallèles, dits systèmes latéraux de convoyage, s'étendant longitudinalement (dans la direction de convoyage), et destinés à être agencés pour supporter les côtés latéraux de la feuille de verre, et les moyens de maintien comportent au moins un système de maintien placé au-dessus des systèmes latéraux de convoyage et au-dessus de la feuille de verre, et destiné à limiter l'amplitude des mouvements de la feuille de verre De préférence, les moyens de maintien comportent au moins deux systèmes de maintien placés au-dessus et en regard des systèmes latéraux de convoyage, et destinés à être au-dessus de la feuille de verre pour limiter l'amplitude des mouvements de la feuille de verre. Par la suite, les systèmes de maintien latéraux peuvent aussi être dénommés systèmes de maintien supérieur. According to the invention, the device for conveying and holding a glass sheet comprises conveying means and holding means for holding a glass sheet in position, in particular in (substantially) horizontal position, and is characterized in that the conveying means comprise at least two parallel spaced conveying systems, said lateral conveying systems, extending longitudinally (in the conveying direction), and intended to be arranged to support the lateral sides of the glass sheet and the holding means comprise at least one holding system placed above the lateral conveying systems and above the glass sheet, and intended to limit the range of motion of the glass sheet. Preferably, the holding means comprise at least two holding systems placed above and facing the lateral conveying systems, and intended to be above the glass sheet to limit the amplitude of the movements of the sheet. glass. Subsequently, the lateral support systems can also be called upper holding systems.
Avantageusement, les moyens de convoyage comportent en outre au moins un système de convoyage central, de préférence deux systèmes centraux de convoyage parallèles et espacés, positionnés entre les convoyeurs latéraux de convoyage, la feuille de verre étant destinée à être en regard des convoyeurs centraux au niveau de sa partie centrale. Les deux systèmes latéraux de convoyage sont disposés de façon à être de part et d'autre et à distance du convoyeur central mais suffisamment près de façon à ce que tout ou partie des cotés latéraux de la feuille de verre déborde de ces convoyeurs latéraux. Advantageously, the conveying means further comprise at least one central conveying system, preferably two parallel and spaced central conveyor systems, positioned between the lateral conveying conveyors, the glass sheet being intended to face the central conveyors at the end. level of its central part. The two lateral conveyor systems are arranged to be on both sides and away from the central conveyor but close enough so that all or part of the lateral sides of the glass sheet overflows from these side conveyors.
Les systèmes latréaux de convoyage et les systèmes centraux sont entraînés à la même vitesse. Lorsque les systèmes de maintien ne sont pas fixes, ils sont également entraînés à la même vitesse. The conveying systems and the central systems are driven at the same speed. When the holding systems are not fixed, they are also driven at the same speed.
On entend par côtés latéraux de la feuille de verre, les cotés parallèles à la direction de défilement ou convoyage de la feuille de verre, et par côtés amont et aval, les deux côtés opposés et sensiblement perpendiculaires aux côtés latéraux, l'amont et l'aval s'entendant par rapport au sens de défilement By lateral sides of the glass sheet are meant the sides parallel to the direction of travel or conveying of the glass sheet, and on the upstream and downstream sides, the two opposite and substantially perpendicular sides to the lateral sides, the upstream and the downstream in relation to the direction of scrolling
Les systèmes latéraux de convoyage sont destinés à supporter latéralement la feuille de verre qui, du fait de son galbe, repose en au moins un point de son bord périphérique sur chaque convoyeur latéral. Du fait de son propre poids et de sa souplesse, le verre se déforme le plus souvent suffisamment pour que cet appui ait lieu en deux points. Lateral conveyor systems are intended to laterally support the glass sheet which, because of its shape, rests at least one point of its peripheral edge on each side conveyor. Of With its own weight and flexibility, the glass often deforms sufficiently for this support to take place in two points.
Les systèmes latéraux de maintien sont destinés à bloquer le soulèvement de la feuille de verre lorsque, sous l'effet des jets d'eau ou d'air sous pression, celle-ci se soulève des convoyeurs latéraux. The lateral holding systems are intended to block the lifting of the glass sheet when, under the effect of the jets of water or pressurized air, the latter is lifted from the lateral conveyors.
La feuille de verre s'appuie par sa périphérie en un ou deux points sur les convoyeurs latéraux. The glass sheet is supported by its periphery at one or two points on the lateral conveyors.
On parle de point d'appui pour désigner une zone d'appui du bord périphérique de la feuille de verre sur les systèmes latéraux de convoyage. Ces derniers, qui sont du type courroies, n'étant pas larges, en pratique de 10 à 50 mm, cet appui est petit au regard de la périphérie de la feuille de verre (environ 5 m) et est donc assimilé à un point. We speak of fulcrum to designate a support zone of the peripheral edge of the glass sheet on the lateral conveyor systems. The latter, which are of the type belts, not being wide, in practice from 10 to 50 mm, this support is small compared to the periphery of the glass sheet (about 5 m) and is therefore likened to a point.
La feuille de verre est destinée à être supportée par le ou les convoyeurs centraux et les systèmes latéraux de convoyage sur lesquels repose ponctuellement son bord périphérique. Elle est bloquée ou limitée en mouvement par rapport à sa position sur ces convoyeurs de transport grâce aux systèmes de maintien supérieur qui, soit limitent son mouvement en étant positionnés 5 à 25 mm au-dessus de la feuille de verre donc sans la toucher, soit bloquent son mouvement si ladite feuille les touche. The glass sheet is intended to be supported by the central conveyor (s) and the lateral conveying systems on which its peripheral edge rests punctually. It is blocked or limited in movement relative to its position on these transport conveyors thanks to the upper holding systems which either limit its movement by being positioned 5 to 25 mm above the sheet of glass so without touching it, either block its movement if said sheet touches them.
Ainsi, la feuille de verre destinée à être convoyée, et qui peut si besoin reposer par son bord au niveau de ses côtés amont et aval sur un système de convoyage central habituel, est bloqué ou bien limitée dans l'amplitude de ses mouvements verticaux d'une part vers le bas par le fait qu'elle repose sur les convoyeurs de transport latéraux et d'autre part vers le haut par chacun des systèmes de maintien positionnés au-dessus de chaque convoyeur latéral respectif. De plus, les systèmes de maintien ne touchant pas ou ponctuellement le verre, ils permettent un lavage de toute la surface de la feuille de verre. Thus, the glass sheet intended to be conveyed, and which can if necessary rest by its edge at its upstream and downstream sides on a usual central conveying system, is blocked or limited in the amplitude of its vertical movements. on the one hand downwards by the fact that it rests on the lateral conveying conveyors and on the other hand upwards by each of the holding systems positioned above each respective lateral conveyor. In addition, the maintenance systems not touching or punctually the glass, they allow a washing of the entire surface of the glass sheet.
Le dispositif de l'invention de convoyage et de maintien d'une feuille de verre garantit : - une stabilisation du transport pour toutes feuilles de verre et quelle que soit la géométrie du contour de ladite feuille ; The device of the invention for conveying and holding a glass sheet guarantees: a stabilization of the transport for all sheets of glass and whatever the geometry of the contour of said sheet;
- une protection de la tranche des feuilles de verre contre tout contact ou chocs ; - a protection of the edge of the glass sheets against any contact or shocks;
- une répartition des appuis répartis sur différents points de la périphérie du vitrage en gênant le moins possible l'accès de l'eau et de l'air à la totalité de la surface et la périphérie des feuilles de verre. a distribution of the supports distributed over various points of the periphery of the glazing, with the least possible hindrance to the access of water and air to the entire surface and the periphery of the glass sheets.
Dans la suite de la description, les termes « horizontal », « vertical », « supérieur », « inférieur », « haut », « bas », s'entendent en qualifiant des éléments du dispositif ou d'une feuille de verre lorsque le dispositif repose de manière fixe sur un plan horizontal et que la feuille de verre lui est associée en s'étendant également horizontalement. In the following description, the terms "horizontal", "vertical", "upper", "lower", "high", "low", are qualified by qualifying the elements of the device or a sheet of glass when the device rests fixedly on a horizontal plane and that the glass sheet is associated with it also extending horizontally.
Le terme « hauteur » pour qualifier un élément du dispositif s'entend selon la dimension verticale, c'est-à-dire dans une direction perpendiculaire au plan horizontal contenant le dispositif. The term "height" for qualifying an element of the device means according to the vertical dimension, that is to say in a direction perpendicular to the horizontal plane containing the device.
Le qualificatif « latéral » s'entend quant à une direction transversale (perpendiculaire) à la direction longitudinale de convoyage, c'est-à-dire de défilement des feuilles de verre. The term "lateral" refers to a transverse direction (perpendicular) to the longitudinal direction of conveying, that is to say, scroll glass sheets.
Selon une caractéristique, chaque système de maintien est une courroie de largeur de 10 à 100 mm et avantageusement de 20 à 50 mm ou un fil tendu au-dessus de la feuille de verre de diamètre de 5 à 50 mm et de préférence de 10 à 30 mm et qui se déplace avec ladite feuille de verre sans que ce déplacement ne soit obligatoire dans le cas où la courroie ou le fil ne touche pas la feuille de verre. According to one characteristic, each holding system is a belt with a width of 10 to 100 mm and advantageously of 20 to 50 mm or a wire stretched over the glass sheet with a diameter of 5 to 50 mm and preferably from 10 to 10 mm. 30 mm and that moves with said glass sheet without this displacement being obligatory in the case where the belt or the wire does not touch the sheet of glass.
Ainsi, dans une variante, le ou chaque système de maintien est fixe et n'est pas au contact de la feuille. Dans une autre variante, le ou chaque système de maintien se déplace à la vitesse de la feuille de verre et est au contact de la feuille de verre selon des points de contacts ou les lignes de contact. Thus, in one variant, the or each holding system is fixed and is not in contact with the sheet. In another variant, the or each holding system moves at the speed of the glass sheet and is in contact with the glass sheet at points of contact or contact lines.
Le ou chaque système de maintien est avantageusement une courroie sur laquelle sont réparties des protubérances limitant le contact avec la feuille de verre à des points de contact. The or each holding system is advantageously a belt on which are distributed protrusions limiting the contact with the glass sheet at contact points.
Ainsi, dans le cas d'une courroie, celle-ci peut être recouverte de petites protubérances en forme de cône, demi-sphère ou pyramide afin de limiter le contact entre la courroie et la feuille de verre à un point de contact. Thus, in the case of a belt, it may be covered with small protuberances shaped cone, half-sphere or pyramid to limit the contact between the belt and the glass sheet at a point of contact.
En variante, le ou chaque système de maintien est un fil limitant le contact avec la feuille de verre à des lignes de contact. Dans le cas d'un fil, celui- ci sera lisse et son diamètre étant faible, le contact du fil et de la feuille de verre sera limité à une ligne de contact dont la position oscillera sous les jets d'air et d'eau permettant un nettoyage de toute la surface. Alternatively, the or each holding system is a wire limiting the contact with the glass sheet to contact lines. In the case of a wire, this one will be smooth and its diameter being weak, the contact of the wire and the sheet of glass will be limited to a line of contact whose position will oscillate under the jets of air and water allowing a cleaning of the whole surface.
Le fil présente un diamètre compris entre 5 et 50 mm, particulier entre 10 et 30mm. The wire has a diameter of between 5 and 50 mm, particularly between 10 and 30 mm.
On entend par « point de contact », une surface de contact d'au plus quelques mm2, en particulier d'au plus 25 mm2. The term "contact point" means a contact surface of at most a few mm 2 , in particular at most 25 mm 2 .
On entend par « ligne de contact », une surface de contact présentant une largeur d'au plus 3 mm. La longueur de la ligne dépend du galbe de la feuille de verre mais est généralement de l'ordre de 50 mm. Ainsi, le ou chaque système de maintien est destiné à engendrer un contact local avec le verre, tel que sous la forme d'au moins un point de contact ou d'au moins une ligne de contact, de préférence la surface de contact est d'au plus 25 mm2 ou la ligne de contact présente une largeur d'au plus 3 mm. The term "contact line" means a contact surface having a width of at most 3 mm. The length of the line depends on the curve of the glass sheet but is generally of the order of 50 mm. Thus, the or each holding system is intended to generate a local contact with the glass, such as in the form of at least one contact point or at least one contact line, preferably the contact surface is 25 mm 2 or the nip has a width of at most 3 mm.
Les protubérances sur la courroie de maintien sont régulièrement réparties de sorte qu'il n'y ait pas de contact possible entre la feuille de verre et la courroie. En pratique, les protubérances ont une hauteur comprise entre 5 et 50 mm, de préférence entre 10 et 30 mm, et les protubérances sont espacées d'une distance inférieure à dix fois leur hauteur, de préférence inférieure à cinq fois leur hauteur.. The protuberances on the holding belt are evenly distributed so that there is no possible contact between the glass sheet and the belt. In practice, the protuberances have a height of between 5 and 50 mm, preferably between 10 and 30 mm, and the protuberances are spaced apart by a distance of less than ten times their height, preferably less than five times their height.
Avantageusement, les systèmes latéraux de convoyage et les systèmes de maintien sont ajustables latéralement et en hauteur pour s'adapter à la taille et au galbe de la série de feuilles de verre à laver. Par conséquent, par réglage de la position des convoyeurs latéraux et systèmes de maintien, un même dispositif de l'invention est utilisable quels que soient les dimensions et le galbe des feuilles de verre. Advantageously, the lateral conveying systems and the holding systems are adjustable laterally and vertically to adapt to the size and shape of the series of glass sheets to be washed. Consequently, by adjusting the position of the lateral conveyors and holding systems, the same device of the invention is usable whatever the dimensions and the curve of the glass sheets.
Avantageusement, les systèmes de maintien possèdent des surfaces de contact telles que protubérances qui sont faites d'un matériau plastique , du type polymère, ne risquant pas d'engendrer des rayures sur le verre, par exemple de dureté Shore D inférieur à 90, et suffisamment souple, par exemple en caoutchouc souple, ou notamment de dureté Shore A comprise entre 20 et 80, permettant de s'adapter au galbe local de verre sans exercer une force de réaction trop importante sur le verre. L'invention porte également sur un ensemble comprenant au moins un système de convoyage central, deux systèmes latéraux de convoyage et deux systèmes de maintien associés distants selon la direction transversale au convoyage, caractérisé en ce que les systèmes de convoyage latéraux sont agencés de part et d'autre du dispositif de convoyage central, le dispositif de convoyage central et les systèmes de convoyage latéraux étant entraînés à la même vitesse. Advantageously, the holding systems have contact surfaces such as protuberances which are made of a plastic material, of the polymer type, which does not risk causing scratches on the glass, for example having a Shore D hardness of less than 90, and sufficiently flexible, for example flexible rubber, or in particular Shore A hardness between 20 and 80, to adapt to the local shape of glass without exerting too much reaction force on the glass. The invention also relates to an assembly comprising at least one central conveying system, two lateral conveying systems and two associated holding systems remote in the direction transverse to the conveying, characterized in that the lateral conveying are arranged on either side of the central conveying device, the central conveying device and the lateral conveying systems being driven at the same speed.
L'invention porte enfin sur une installation de lavage et séchage comprenant l'ensemble précité ou au moins un dispositif de convoyage et maintien de l'invention, en particulier pour nettoyer des feuilles de verre, notamment bombées, pour vitrages de véhicules tels que du type pare- brise. Finally, the invention relates to a washing and drying installation comprising the aforementioned assembly or at least one conveying and holding device of the invention, in particular for cleaning glass sheets, in particular curved sheets, for glazing of vehicles such as windshield type.
De manière préférée, le procédé de mise en œuvre du dispositif de l'invention est le suivant, un dispositif de convoyage central étant généralement existant Preferably, the method of implementation of the device of the invention is as follows, a central conveying device being generally existing
- la position (dans un plan horizontal) et la hauteur des systèmes de convoyeurs de latéraux et systèmes de maintien est réglée en position d'arrêt du dispositif ; - la ou les feuilles de verre sont amenée par des moyens automatisés par-dessus le dispositif de convoyage et de maintien pour être logées sur les convoyeurs latéraux et éventuellement le système central de convoyage ; the position (in a horizontal plane) and the height of the lateral conveyor systems and holding systems is set to the stop position of the device; - The glass sheet or sheets are fed by automated means over the conveying and holding device to be housed on the side conveyors and possibly the central conveying system;
- chaque feuille de verre est déposée sur le dispositif de convoyage central au moins en quatre points d'appui selon le galbe par ses bords amont et aval, la face concave pour une feuille de verre bombée étant tournée en regard du convoyeur (vers le bas) ; each sheet of glass is deposited on the central conveying device at least at four points of support along the curve by its upstream and downstream edges, the concave face for a curved glass sheet being turned facing the conveyor (downwards); );
- pendant ce dépôt de la feuille de verre, celle-ci vient en applique contre les convoyeurs latéraux. Puis lors du convoyage, avant de rentrer dans la machine à laver la feuille de verre vient s'insérer sous les systèmes de maintien. La présente invention est maintenant décrite à l'aide d'exemples uniquement illustratifs et nullement limitatifs de la portée de l'invention, et à partir des illustrations ci-jointes, dans lesquelles : - During this deposition of the glass sheet, it is applied against the side conveyors. Then during the conveying, before entering the washing machine the glass sheet is inserted under the holding systems. The present invention is now described with the aid of examples which are only illustrative and in no way limit the scope of the invention, and from the attached illustrations, in which:
- La figure 1 représente, dans une installation de lavage, une vue schématique en coupe du dispositif de convoyage et maintien de l'invention selon un premier mode de réalisation en position de maintien d'une feuille de verre, la vue en coupe étant transversale par rapport à la direction longitudinale de convoyage et située dans un plan vertical passant par le point de contact de la feuille de verre avec les systèmes de maintien ;  - Figure 1 shows, in a washing installation, a schematic sectional view of the conveying device and maintenance of the invention according to a first embodiment in the holding position of a glass sheet, the sectional view being transverse relative to the longitudinal conveying direction and located in a vertical plane passing through the point of contact of the glass sheet with the holding systems;
- La figure 2 est vue schématique de dessus du dispositif de convoyage et maintien de l'invention de la figure 1 ;  - Figure 2 is a schematic top view of the conveying device and maintaining the invention of Figure 1;
- La figure 3 représente, dans une installation de lavage, une vue schématique en coupe du dispositif de convoyage et maintien de l'invention selon un deuxième mode de réalisation en position de maintien d'une feuille de verre, la vue en coupe étant transversale par rapport à la direction longitudinale de convoyage et située dans un plan vertical passant par le point de contact de la feuille de verre, les systèmes de maintien étant des fils ;  - Figure 3 shows, in a washing installation, a schematic sectional view of the conveying device and maintenance of the invention according to a second embodiment in the holding position of a glass sheet, the sectional view being transverse with respect to the longitudinal conveying direction and situated in a vertical plane passing through the point of contact of the glass sheet, the holding systems being wires;
- La figure 4 est un vue schématique de dessus du dispositif de convoyage et maintien de l'invention de la figure 3.  FIG. 4 is a schematic view from above of the conveying and holding device of the invention of FIG. 3.
Le dispositif 1 de convoyage et de maintien de l'invention illustré sur les figures 1 et 2 ou 3 et 4, a pour but de maintenir une feuille de verre 2 dans un plan sensiblement horizontal, de la convoyer ou participer à son convoyage selon un sens F, et de la maintenir en position sans effet d'amplitude ou à tout le moins en minimisant ces effets d'amplitudes, lorsqu'elle soumise à de fortes vibrations sur ses deux faces, notamment par des jets de pression d'eau et d'air. La figure 1 illustre schématiquement en vue en coupe d'une installation 3 de convoyage et de projection d'air comprenant le dispositif de convoyage et de maintien 1 d'une feuille de verre 2, comprenant deux systèmes de convoyage latéraux 10A et 10B parallèles et espacés agencés latéralement à la feuille de verre 2, et de préférence un convoyeur central 4 comprenant deux courroies d'entraînement 40 et 41 , et positionné entre les deux systèmes de convoyage latéraux 10A et 10B, ainsi que des jets de pression d'eau ou d'air symbolisés par les flèches F1 et F2 dirigées verticalement respectivement vers le haut et vers le bas. En outre, selon l'invention, le dispositif comporte des systèmes de maintien 1 1 A et 1 1 B destinés à bloquer le soulèvement de la feuille de verre lorsque, sous l'effet des jets d'eau ou d'air sous pression, celle-ci se soulève des convoyeurs latéraux 10A et 10B. The device 1 for conveying and holding the invention illustrated in FIGS. 1 and 2 or 3 and 4, is intended to hold a glass sheet 2 in a substantially horizontal plane, to convey it or to participate in its conveying according to a direction F, and maintain it in position without amplitude effect or at least minimizing these effects of amplitudes, when subjected to strong vibrations on both sides, in particular by water pressure jets and air. FIG. 1 is a diagrammatic cross-sectional view of a conveying and air-blowing installation 3 comprising the conveying and holding device 1 of a glass sheet 2, comprising two parallel lateral conveying systems 10A and 10B, and spaced arranged laterally to the glass sheet 2, and preferably a central conveyor 4 comprising two drive belts 40 and 41, and positioned between the two lateral conveying systems 10A and 10B, as well as water pressure jets or of air symbolized by the arrows F1 and F2 directed vertically respectively upwardly and downwardly. In addition, according to the invention, the device comprises holding systems 1 1 A and 1 1 B intended to block the lifting of the glass sheet when, under the effect of jets of water or air under pressure, it is lifted from the side conveyors 10A and 10B.
La feuille de verre 2 présente deux faces opposées inférieure 20 et supérieure 21 s'étendant horizontalement, la face inférieure 20 est tournée vers le bas. La feuille de verre comporte deux côtés latéraux opposés 22A et 22B, parallèles à la direction de défilement, et deux autres côtés dits amont 23A et aval 23B, transversaux aux côtés latéraux. Le convoyage se fait selon la flèche F (figure 2). La feuille de verre 2 repose horizontalement sur les courroies d'entraînement 40 et 41 par son bord au niveau de ses côtés amont 23A et aval 23B (au moins en quatre points selon son galbe). The glass sheet 2 has two opposite lower and upper faces 21 extending horizontally, the lower face 20 is facing downwards. The glass sheet has two opposite lateral sides 22A and 22B, parallel to the direction of travel, and two other sides said upstream 23A and downstream 23B, transverse to the lateral sides. The conveying is done according to the arrow F (Figure 2). The glass sheet 2 rests horizontally on the drive belts 40 and 41 by its edge at its upstream sides 23A and downstream 23B (at least in four points along its curve).
Le dispositif de convoyage et maintien 1 garantit, via les systèmes de maintien 1 1 A et 1 1 B, le maintien de la feuille de verre 2 dans ce plan horizontal perpendiculairement aux jets. The conveying and holding device 1 ensures, via the holding systems 1 1 A and 1 1 B, the maintenance of the glass sheet 2 in this horizontal plane perpendicular to the jets.
La feuille de verre 2 est dans l'exemple représenté galbée, la face inférieure 20 correspondant à la face concave 20. La concavité de la feuille de verre est donc tournée vers le bas, c'est-à-dire en regard du convoyeur central 4. The glass sheet 2 is in the example represented curved, the lower face 20 corresponding to the concave face 20. The concavity of the glass sheet is thus turned downwards, that is to say facing the central conveyor 4.
La feuille de verre 2 repose donc dans sa partie médiane via sa face inférieure 20 sur le convoyeur central 4. Les systèmes latéraux de convoyage sont destinés à supporter latéralement la feuille de verre qui, du fait de son galbe, repose en au moins un point de son bord périphérique sur chaque convoyeur latéral. En pratique, du fait de son propre poids et de sa souplesse, le verre se déforme le plus souvent suffisamment pour que cet appui ait lieu en deux points amont et aval sur chaque convoyeur latéral. The glass sheet 2 thus rests in its median part via its lower face 20 on the central conveyor 4. The lateral conveying systems are intended to support laterally the glass sheet which, because of its curve, rests in at least one point from its peripheral edge on each side conveyor. In practice, because of its own weight and its flexibility, the glass deforms often enough for this support to take place at two points upstream and downstream on each side conveyor.
Lorsque les systèmes de maintien sont en contact avec le verre, ce contact a lieu en deux points P1 et P2 tels qu'illustrés sur la figure 1 When the holding systems are in contact with the glass, this contact takes place at two points P1 and P2 as illustrated in FIG.
Les systèmes de convoyage 10A et 10B avec leurs systèmes de maintien 1 1 A et 1 1 B sont positionnés en réglant les éléments de maintien avant le démarrage d'une production (lavage de feuilles de verre) afin de supporter les formes de feuilles de verre (généralement pour pare-brise) de la production à venir. The conveyor systems 10A and 10B with their holding systems 11A and 11B are positioned by adjusting the holding elements before the start of production (washing of glass sheets) in order to support the shapes of glass sheets (usually for windshield) future production.
Les systèmes de maintien 1 1 A et 1 1 B sont aptes à être ajustés en position dans un plan horizontal et perpendiculairement à l'axe de défilement de la feuille de verre. The holding systems 1 1 A and 1 1 B are adapted to be adjusted in position in a horizontal plane and perpendicular to the scroll axis of the glass sheet.
Les systèmes de maintien 1 1 A et 1 1 B sont par exemple des courroies. The holding systems 1 1 A and 1 1 B are for example belts.
De préférence, les systèmes de maintien (tels les courroies) comportent des protubérances 12 qui constituent des points de contact (localisés) avec le verre lorsque la feuille de verre touche lesdits systèmes de maintien. La matière des éléments de maintien (protubérances) en applique contre le verre est adaptée pour éviter la création d'amorces de rupture lorsque le verre subit des vibrations dues au lavage et au séchage. Preferably, the holding systems (such as the belts) comprise protuberances 12 which constitute points of contact (localized) with the glass when the glass sheet touches said holding systems. The material of the holding elements (protuberances) applied against the glass is adapted to prevent the creation of break primers when the glass undergoes vibrations due to washing and drying.
Les protubérances qui sont faites d'un matériau plastique, du type polymère, ne risquant pas d'engendrer des rayures sur le verre, par exemple de dureté Shore D inférieur à 90, et suffisamment souple, par exemple en caoutchouc souple, ou notamment de dureté Shore A comprise entre 20 et 80, permettant de s'adapter au galbe local de verre sans exercer une force de réaction trop importante sur le verre. Les protubérances sur la courroie de maintien sont régulièrement réparties de sorte qu'il n'y ait pas de contact possible entre la feuille de verre et la courroie. En pratique, les protubérances ont une hauteur comprise entre 5 et 50 mm, de préférence entre 10 et 30 mm, et les protubérances sont espacées d'une distance inférieure à dix fois leur hauteur, de préférence inférieure à cinq fois leur hauteur.. The protuberances which are made of a plastic material, of the polymer type, not likely to cause scratches on the glass, for example of Shore D hardness less than 90, and sufficiently flexible, for example of flexible rubber, or especially of Shore A hardness between 20 and 80, to adapt to the local shape of glass without exerting too much reaction force on the glass. The protuberances on the holding belt are evenly distributed so that there is no possible contact between the glass sheet and the belt. In practice, the protuberances have a height of between 5 and 50 mm, preferably between 10 and 30 mm, and the protuberances are spaced apart by a distance of less than ten times their height, preferably less than five times their height.
Les protubérances 12 sont par exemple issues de surfaces crantées ou d'ondulations procurant une alternance de nervures (les protubérances) et creux alternés, parallèles. Les protubérances peuvent présenter diverses géométries, telles que des pyramides dont la tête est tronquée ou non, des sphères ou demi-sphères, ou autres. The protrusions 12 are for example derived from notched surfaces or corrugations providing an alternation of ribs (the protuberances) and alternating hollow parallel. The protuberances may have various geometries, such as pyramids whose head is truncated or not, spheres or half-spheres, or other.
Les figures 3 et 4 correspondent à une variante de réalisation des figures 1 et 2. Les systèmes de maintien se présentent ici la forme de fils 13A et 13B. Figures 3 and 4 correspond to an alternative embodiment of Figures 1 and 2. The holding systems are here the son of 13A and 13B.
Les fils 13A et 13B limitent le contact avec la feuille de verre à des lignes de contact. Dans le cas d'un fil, celui-ci sera lisse et son diamètre étant faible, le contact du fil et de la feuille de verre sera limité à une ligne de contact dont la position oscillera sous les jets d'air et d'eau permettant un nettoyage de toute la surface. The wires 13A and 13B limit contact with the glass sheet to nips. In the case of a wire, it will be smooth and its diameter being small, the contact of the wire and the sheet of glass will be limited to a line of contact whose position will oscillate under the jets of air and water allowing a cleaning of the whole surface.
Le fil présente un diamètre compris entre 5 et 50 mm, particulier entre 10 et 30mm. The wire has a diameter of between 5 and 50 mm, particularly between 10 and 30 mm.

Claims

REVENDICATIONS
Dispositif de convoyage et de maintien (1 ) d'une feuille de verre (2) comportant des moyens de convoyage et des moyens de maintien destinés à maintenir en position une feuille de verre, notamment en position horizontale, caractérisé en ce que les moyens de convoyage comporte au moins deux systèmes de convoyage espacés et parallèles (10A, 10B), dits systèmes latéraux de convoyage, s'étendant longitudinalement dans la direction de convoyage, et destinés à être agencés pour supporter les côtés latéraux de la feuille de verre, et les moyens de maintien comportent au moins un système de maintien (1 1 A, 1 1 B ; 13A, 13B) placé au-dessus des systèmes latéraux de convoyage (10A, 10B) et au-dessus de la feuille de verre, et destiné à limiter l'amplitude des mouvements de la feuille de verre. Device for conveying and holding (1) a glass sheet (2) comprising conveying means and holding means for holding a glass sheet in position, in particular in a horizontal position, characterized in that the means for conveying comprises at least two spaced and parallel conveying systems (10A, 10B), said lateral conveying systems, extending longitudinally in the conveying direction, and intended to be arranged to support the lateral sides of the glass sheet, and the holding means comprise at least one holding system (11A, 11B, 13A, 13B) placed above the lateral conveyor systems (10A, 10B) and above the glass sheet, and for to limit the range of motion of the glass sheet.
Dispositif selon la revendication 1 , caractérisé en ce que les moyens de maintien comportent au moins deux systèmes de maintien (1 1 A, 1 1 B ; 13A, 13B) placés au-dessus et en regard des systèmes latéraux de convoyage, et destinés à être au- dessus de la feuille de verre pour limiter l'amplitude des mouvements de la feuille de verre. Device according to claim 1, characterized in that the holding means comprise at least two holding systems (1 1 A, 1 1 B; 13A, 13B) placed above and opposite the lateral conveying systems, and intended to be above the glass sheet to limit the range of motion of the glass sheet.
Dispositif selon la revendication précédente, caractérisé en ce que les moyens de convoyage comportent en outre au moins un système de convoyage central (4), de préférence deux systèmes centraux de convoyage (40, 41 ) parallèles et espacés, positionnés entre les convoyeurs latéraux de convoyage, la feuille de verre étant destinée à être en regard des convoyeurs centraux au niveau de sa partie centrale. Dispositif selon la revendication 1 , caractérisé en ce que le ou chaque système de maintien (13) est fixe et n'est pas au contact de la feuille. Device according to the preceding claim, characterized in that the conveying means further comprise at least one central conveying system (4), preferably two parallel and spaced central conveyor systems (40, 41), positioned between the lateral conveyors of conveying, the glass sheet being intended to be facing the central conveyors at its central portion. Device according to claim 1, characterized in that the or each holding system (13) is fixed and is not in contact with the sheet.
Dispositif selon la revendication 1 , caractérisé en ce que le ou chaque système de maintien (1 1 A, 1 1 B) se déplace à la vitesse de la feuille de verre et est au contact de la feuille de verre selon des points de contacts ou les lignes de contact. Device according to claim 1, characterized in that the or each holding system (1 1 A, 1 1 B) moves at the speed of the glass sheet and is in contact with the glass sheet according to points of contact or the lines of contact.
Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le ou chaque système de maintien (1 1 A, 1 1 B) est une courroie sur laquelle sont réparties des protubérances (12) limitant le contact avec la feuille de verre à des points de contacts. Device according to any one of claims 1 to 3, characterized in that the or each holding system (1 1 A, 1 1 B) is a belt on which are distributed protuberances (12) limiting the contact with the sheet of glass at points of contact.
Dispositif selon la revendication précédente, caractérisé en ce que les protubérances ont une hauteur comprise entre 5 et 50 mm, de préférence entre 10 et 30 mm, et les protubérances sont espacées d'une distance inférieure à dix fois leur hauteur, de préférence inférieure à cinq fois leur hauteur. Device according to the preceding claim, characterized in that the protuberances have a height of between 5 and 50 mm, preferably between 10 and 30 mm, and the protuberances are spaced apart by a distance of less than ten times their height, preferably less than five times their height.
Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le ou chaque système de maintien (13A, 13B) est un fil, de préférence le fil a un diamètre compris entre 5 et 50 mm, en particulier entre 10 et 30 mm. Device according to any one of claims 1 to 5, characterized in that the or each holding system (13A, 13B) is a wire, preferably the wire has a diameter of between 5 and 50 mm, in particular between 10 and 30 mm.
Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le ou chaque système de maintien (1 1 A, 1 1 B ; 12 ; 13A, 13B) est destiné à engendrer un contact local avec le verre, tel que sous la forme d'au moins un point de contact ou d'au moins une ligne de contact, de préférence la surface de contact est d'au plus 25 mm2 ou la ligne de contact présente une largeur d'au plus 3 mm. Device according to any one of claims 1 to 3, characterized in that the or each holding system (1 1 A, 1 1 B; 12; 13A, 13B) is intended to generate a local contact with the glass, such as in the form of at least one contact point or at least one contact line, preferably the contact surface is at most 25 mm 2 or the contact line has a width of at most 3 mm.
10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les systèmes de maintien (1 1 A, 1 1 B ; 12 ; 13A, 13B) possèdent des surfaces de contact qui sont faites d'un matériau plastique, du type polymère, ne risquant pas d'engendrer des rayures sur le verre, par exemple de dureté Shore D inférieur à 90, et suffisamment souple, par exemple en caoutchouc souple, ou notamment de dureté Shore A comprise entre 20 et 80, permettant de s'adapter au galbe local de verre sans exercer une force de réaction trop importante sur le verre. 10. Device according to any one of the preceding claims, characterized in that the holding systems (1 1 A, 1 1 B; 12; 13A, 13B) have contact surfaces which are made of a plastic material, polymer type, not likely to cause scratches on the glass, for example of Shore D hardness less than 90, and sufficiently flexible, for example flexible rubber, or in particular Shore A hardness between 20 and 80, allowing s adapt to the local glass curvature without exerting too much reaction force on the glass.
1 1 . Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les systèmes latéraux de convoyage (10A, 10B) et les systèmes de maintien (1 1 A, 1 1 B ; 13A, 13B) sont ajustables latéralement et en hauteur pour s'adapter à la taille et au galbe de la série de feuilles de verre. 1 1. Device according to any one of the preceding claims, characterized in that the lateral conveying systems (10A, 10B) and the holding systems (11A, 11B, 13A, 13B) are adjustable laterally and vertically for adapt to the size and shape of the series of glass sheets.
12. Installation de lavage et séchage (3) comprenant au moins un dispositif de maintien (1 ) selon l'une quelconque des revendications 1 à 12 ou un ensemble selon la revendication précédente, en particulier pour nettoyer des feuilles de verre, notamment bombées, pour vitrages de véhicules. 12. Washing and drying installation (3) comprising at least one holding device (1) according to any one of claims 1 to 12 or an assembly according to the preceding claim, in particular for cleaning glass sheets, in particular curved sheets, for windows of vehicles.
EP17720551.5A 2016-04-06 2017-04-05 Device for conveying and retaining a glass sheet, particularly in a washing facility Withdrawn EP3439802A1 (en)

Applications Claiming Priority (2)

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FR1653036A FR3049942A1 (en) 2016-04-06 2016-04-06 CONVEYING AND HOLDING DEVICE FOR GLASS SHEET IN PARTICULAR IN A WASHING PLANT
PCT/FR2017/050810 WO2017174936A1 (en) 2016-04-06 2017-04-05 Device for conveying and retaining a glass sheet, particularly in a washing facility

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EP3439802A1 true EP3439802A1 (en) 2019-02-13

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EP (1) EP3439802A1 (en)
JP (1) JP2019517965A (en)
KR (1) KR20180133878A (en)
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BR (1) BR112018070286A2 (en)
CA (1) CA3019300A1 (en)
FR (1) FR3049942A1 (en)
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CN112830254A (en) * 2021-03-10 2021-05-25 苏州晶洲装备科技有限公司 Curved surface glass conveyer

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CA3019300A1 (en) 2017-10-12
KR20180133878A (en) 2018-12-17
WO2017174936A1 (en) 2017-10-12
RU2739360C2 (en) 2020-12-23
CN109070153A (en) 2018-12-21
BR112018070286A2 (en) 2019-01-29
JP2019517965A (en) 2019-06-27
RU2018138587A (en) 2020-05-18
MX2018012199A (en) 2018-12-17
RU2018138587A3 (en) 2020-07-16
US10525512B2 (en) 2020-01-07
FR3049942A1 (en) 2017-10-13
US20190151909A1 (en) 2019-05-23
MA44616A (en) 2019-02-13

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