EP0674949B1 - Device for projecting a coating product - Google Patents

Device for projecting a coating product Download PDF

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Publication number
EP0674949B1
EP0674949B1 EP95400708A EP95400708A EP0674949B1 EP 0674949 B1 EP0674949 B1 EP 0674949B1 EP 95400708 A EP95400708 A EP 95400708A EP 95400708 A EP95400708 A EP 95400708A EP 0674949 B1 EP0674949 B1 EP 0674949B1
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EP
European Patent Office
Prior art keywords
carriage
members
air
sprayer
space
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95400708A
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German (de)
French (fr)
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EP0674949A1 (en
Inventor
Pierre Ehinger
Patrice Gory
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Sames SA
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Sames SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0447—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles
    • B05B13/0452—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles the conveyed articles being vehicle bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0405—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with reciprocating or oscillating spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/60—Ventilation arrangements specially adapted therefor

Definitions

  • the invention relates to a device for projecting coating product, such as for example used in the coating of motor vehicle bodies.
  • the bodies are moved by a conveyor and the product projection machine covering includes a gantry supporting a beam horizontal perpendicular to the path of the bodies, this beam carries one or more sprayers of coating product.
  • These machines often referred to as roof machines, are of utmost importance for the covering objects to be painted, especially when these objects have many horizontal surfaces or perpendicular to the path of objects on the conveyor such as the front, hood, roof, trunk and the rear of a motor vehicle body.
  • a machine roof comprising a single carriage carrying one or several projector (s) and moving along the beam at speeds of the order of 1.5 m / s. This movement quick sweep coating all surfaces planes with a minimum number of supply systems coating product, in spray air and, possibly in high voltage.
  • the carriages are driven by belts or chains located on the side of the beam facing the bodywork or on a lateral face of the beam.
  • the rapid movements of the or carts remove dust particles or dried coating product that adhere to these systems and, given the turbulence induced at neighborhood of the projector (s), some of these particles are deposited on the bodywork, which is damaging to the desired surface finish.
  • the carriage is sometimes asymmetrical, that is to say for example provided with a arms cantilevered on one side of the beam. If the beam is susceptible to rotational movements around its largest axis, in particular to allow the projector to be permanently perpendicular to the surface to be coated, including in the case of the front and from the rear of the body, the asymmetry of the carriage induces different behavior of air flow around the projector according to the direction of rotation of the beam which is all the more difficult for the operator to manage.
  • the invention solves all of these problems.
  • a product projection device covering machine forming a roof comprising two gantries supporting a beam moving at altitude by in relation to said gantries and in rotation about an axis parallel to its largest dimension, at least one carriage carrying at least one projector being susceptible this move along said beam, characterized in that, over most of its length, said beam is formed of two parallel spars and spaced one of the other defining between them a space and in that said carriage is mounted movable between said beams and extends at least partially in said space.
  • the device which is installed in a projection booth provided with means capable of creating a dominant draft is characterized in that said beam is arranged so that said air stream dominant leads, in the space defined between the two stringers, air circulation having substantially the same meaning that the projection of coating product.
  • the air flow is only a little disturbed since the dominant air current installed in the cabin by ventilation system can be maintained to the vicinity of the projector (s).
  • the turbulence no longer have a tendency to dirty headlights, cart or beam and particles of dust or product coating are no longer dragged toward the surface to put on.
  • the beam used is of small section, therefore light, which reduces its inertia and optimizes the dimensioning of the gantries which support it and the motors which ensure its movement.
  • At least some of said carriage carrying said projector is capable of movements perpendicular to the axis of said beam.
  • figure 1 is intended for coating of automobile bodies 1 carried by a conveyor 2 along a path along an axis XX '.
  • She includes, among other things, two gantry cranes 3 and 4 arranged on either side of the conveyor path and supporting a beam 5 along which a carriage 6 is susceptible to move.
  • the movement of the carriage 6 allows it to sweep the entire width of the body 1 in order to place two projectors 7 and 8 facing all the surfaces to put on.
  • the beam is made integral with the gantries 2 and 4 by two bearings 9 and 10 which allow it to be made perform rotational movements around an axis YY ' parallel to its largest dimension.
  • Landings 9 and 10, and consequently the beam 5 and the apparatuses that she wears, are mobile in altitude compared to gantry cranes 3 and 4, thanks to drive systems known, such as that described in the application FR-A-27 14 853.
  • a dominant vertical air flow from top to bottom in the direction of the arrows F is created in cabin 14 of projection containing the installation thanks to a ventilation 15, for example comprising an air source located in the plenum, or ceiling of the cabin.
  • the projectors 7 and 8 are mounted at the end of a extension 11 at the ends of an arm 12 pivotally mounted in its middle on a wrist 13 provided with a horizontal axis.
  • This mounting allows the relative altitude of the projectors 7 and 8. In this way, it is possible, at the end of carriage 6 travel to lower the projector outside along the side of the body in order to obtain partial overlap of the coating area with that a projector carried by a lateral machine and intended for line the sides of the body.
  • the beam 5 is shown in perspective. It includes, over most of its length, two side members 20 and 21, in polyester resin or glass fiber filled epoxy, which are integral with their ends of the bearings 9 and 10. They are parallel and spaced from each other so as to spare them a space 22 in which the extension 11 of the carriage 6 at the end of which are housed the projectors 7 and 8.
  • the upper part 26 of the carriage 6 has a width greater than that of the space 22 and rests on the side members 20 and 21.
  • This stability of the air flow in the area of projection avoids recirculations of the cloud including coating product particles to the top of the cabin: the side members 20 and 21 and the carriage 6 do not risk not to be soiled by untimely product returns.
  • the beam thus formed is symmetrical by relative to a vertical plane containing the axis YY '. She has the same aerodynamic influence and induces the same inertia constraints on its drive systems which that is its direction of rotation around the axis YY '.
  • the carriage is driven in displacement along the axis YY 'by an electric motor 23 located in one of the bearings 9 or 10 and driving two pulleys 24 and 25 which are respectively associated with two pulleys crazy 24 'and 25' located in the other landing.
  • belts 27 and 28 notched and each forming a loop closed are tensioned respectively between the pulleys 24 and 24 'on the one hand and 25 and 25' on the other. They are housed in the longitudinal members 20 and 21 and their outer faces are in the open air opposite, respectively, two openings 20A and 21A formed in the upper walls of the stringers.
  • Belts 27 and 28 are slightly more wider than the openings 20A and 21A, which allows them cover and seal completely. This avoids that dirt gets into the side members 20 and 21.
  • the carriage 6, and in particular its upper part 26, are integral with the two belts 27 and 28: they are displaced along the axis YY 'by the movements of belts.
  • Counterweights 29, housed in the longitudinal members 20 and 21 are moved in the opposite direction of the carriage 6 by the belts 27 and 28, which avoids subjecting the gantry cranes 3 and 4 to too great pendulum movements.
  • Any soiling generated by this system drive due to the position of the belts 27 and 28 and the rotation of the beam 5 around the axis YY ', do not may appear only on the side opposite the object to be coated, which prevents them from being dragged towards it.
  • Uncoilers 30 and 31 are respectively housed in the side members 20 and 21 and contain the conduits coating product and air supply spraying and training and possibly the power cables in the case of a projection device by electrostatic means.
  • the unwinders, conduits and cables are completely housed inside beam 5: they are protected from contamination and a leak in one of the pipes will not necessarily result in pollution of the bodywork in the course of coating.
  • a projection installation coating product and the fact that the side members are made of insulating material, it is then possible to keep unwinders and ducts at different electrical potentials.
  • the section of extension 11 is visible in the figure 3. This profile is symmetrical because the carriage is susceptible travel in both directions. It has an oblong shape intended to limit the compression / depression effect of the air located in space 22 when the carriage 6 and therefore to minimize the formation of turbulence at the rear of extension 11 in motion. This avoids disturb the flow outside the space 22, and particular to draw air in the vicinity of the spotlights 7 and 8.
  • FIGS. 4 a and 4 b differs from that of FIGS. 1 to 3 in that the distance of the projectors 7 and 8 relative to the axis YY 'is adjustable. Elements identical to those in FIG. 2 have the same reference numbers.
  • FIG. 4 a the distance between the projectors 7 and 8 and the beam 5 is maximum.
  • Figure 4b this distance is reduced, the projectors are closer to the beam.
  • a motor 101 associated with a ball screw 102 is mounted on a carriage 106 secured to the belts 27 and 28.
  • a second carriage 116 secured to the nut of the ball screw and supporting the upper part 26 of the carriage and the extension 11 can be moved aloft on rails 103 and 104 carried by the carriage 106 and perpendicular to the axis YY '.
  • This translational movement and the movement of rotation of the shaft 12 around the wrist 13 allow keep projectors 7 and 8 at a distance optimal in relation to the object to be coated and perpendicular to it.
  • the invention applies equally well to a device for painting only with a powder coating device and can be used with one or more pneumatic headlamp (s), rotary (s), electrostatic (s) or not. Its use is not limited to the automotive field but extends to all installations incorporating roof machines.

Landscapes

  • Spray Control Apparatus (AREA)

Description

L'invention concerne un dispositif de projection de produit de revêtement, tel que par exemple utilisé dans le revêtement de carrosseries de véhicules automobiles.The invention relates to a device for projecting coating product, such as for example used in the coating of motor vehicle bodies.

Dans les dispositifs de l'art antérieur connus notamment de EP-A-0 480 663, sur une chaíne de production, les carrosseries sont déplacées par un convoyeur et la machine de projection de produit de revêtement comprend un portique soutenant une poutre horizontale perpendiculaire au trajet des carrosseries, cette poutre porte un ou plusieurs pulvérisateurs de produit de revêtement. Ces machines, souvent dénommées machines de toit, sont d'une importance capitale pour le recouvrement des objets à peindre, en particulier lorsque ces objets présentent de nombreuses surfaces horizontales ou perpendiculaires au trajet des objets sur le convoyeur telles que l'avant, le capot, le pavillon, le coffre et l'arrière d'une carrosserie de véhicule automobile.In the devices of the prior art known in particular from EP-A-0 480 663, on a production line, the bodies are moved by a conveyor and the product projection machine covering includes a gantry supporting a beam horizontal perpendicular to the path of the bodies, this beam carries one or more sprayers of coating product. These machines, often referred to as roof machines, are of utmost importance for the covering objects to be painted, especially when these objects have many horizontal surfaces or perpendicular to the path of objects on the conveyor such as the front, hood, roof, trunk and the rear of a motor vehicle body.

Dans certaines applications, comme par exemple le revoilage des peintures métallisées, on utilise une machine de toit comportant un unique chariot portant un ou plusieurs projecteur(s) et se déplaçant le long de la poutre à des vitesses de l'ordre de 1,5 m/s. Ce mouvement de balayage rapide permet de revêtir toutes les surfaces planes avec un nombre minimal de systèmes d'alimentation en produit de revêtement, en air de pulvérisation et, éventuellement, en haute tension.In some applications, such as the revoiling of metallic paints, we use a machine roof comprising a single carriage carrying one or several projector (s) and moving along the beam at speeds of the order of 1.5 m / s. This movement quick sweep coating all surfaces planes with a minimum number of supply systems coating product, in spray air and, possibly in high voltage.

Or, les mouvements rapides du chariot sur la poutre créent des turbulences qui perturbent l'écoulement de l'air ambiant au voisinage du ou des projecteur(s). La qualité du dépôt en est affectée et les projecteurs, le chariot et la poutre ont tendance à se salir rapidement, ce qui implique des arrêts réguliers pour le nettoyage de l'installation. Une surveillance quasi constante de l'installation et des interventions manuelles nombreuses sont nécessaires.However, the rapid movements of the carriage on the beam create turbulence that disrupts air flow ambient near the projector (s). The quality of depot is affected and the projectors, the cart and the beam tend to get dirty quickly, which implies regular stops for cleaning the installation. Almost constant monitoring of the installation and Numerous manual interventions are necessary.

De plus, dans les dispositifs connus, les chariots sont entraínés par des courroies ou des chaínes situées du côté de la poutre tourné vers les carrosseries ou sur une face latérale de la poutre. Les mouvements rapides du ou des chariots décollent les particules de poussière ou de produit de revêtement séchées qui adhèrent à ces systèmes d'entraínement et, étant donné les turbulences induites au voisinage du ou des projecteur(s), une partie de ces particules se dépose sur les carrosseries, ce qui est dommageable à l'état de surface recherché.In addition, in known devices, the carriages are driven by belts or chains located on the side of the beam facing the bodywork or on a lateral face of the beam. The rapid movements of the or carts remove dust particles or dried coating product that adhere to these systems and, given the turbulence induced at neighborhood of the projector (s), some of these particles are deposited on the bodywork, which is damaging to the desired surface finish.

Dans le cas d'une poutre classique, le chariot est parfois dissymétrique, c'est-à-dire par exemple muni d'un bras en porte à faux d'un seul côté de la poutre. Si la poutre est susceptible de mouvements de rotation autour de son plus grand axe, en particulier afin de permettre au projecteur d'être en permanence perpendiculaire à la surface à revêtir, y compris lorsqu'il s'agit de l'avant et de l'arrière de la carrosserie, la dissymétrie du chariot induit un comportement différent de l'écoulement d'air autour du projecteur selon le sens de rotation de la poutre ce qui est d'autant plus délicat à gérer pour l'opérateur.In the case of a conventional beam, the carriage is sometimes asymmetrical, that is to say for example provided with a arms cantilevered on one side of the beam. If the beam is susceptible to rotational movements around its largest axis, in particular to allow the projector to be permanently perpendicular to the surface to be coated, including in the case of the front and from the rear of the body, the asymmetry of the carriage induces different behavior of air flow around the projector according to the direction of rotation of the beam which is all the more difficult for the operator to manage.

Enfin, les dispositifs connus sont lourds: les portiques qui soutiennent les poutres doivent être dimensionnés en conséquence. Ils sont aussi encombrants: l'écoulement d'air dans la cabine est perturbé.Finally, the known devices are heavy: portal frames that support the beams must be dimensioned accordingly. They are also bulky: the air flow in the cabin is disturbed.

L'invention résout l'ensemble de ces problèmes. The invention solves all of these problems.

Elle concerne un dispositif de projection de produit de revêtement formant machine de toit comportant deux portiques supportant une poutre mobile en altitude par rapport auxdits portiques et en rotation autour d'un axe parallèle à sa plus grande dimension, au moins un chariot portant au moins un projecteur étant susceptible ce se déplacer le long de ladite poutre, caractérisé en ce que, sur la plus grande partie de sa longueur, ladite poutre est formée de deux longerons parallèles et espacés l'un de l'autre définissant entre eux un espace et en ce que ledit chariot est monté mobile entre lesdits longerons et s'étend au moins partiellement dans ledit espace.It relates to a product projection device covering machine forming a roof comprising two gantries supporting a beam moving at altitude by in relation to said gantries and in rotation about an axis parallel to its largest dimension, at least one carriage carrying at least one projector being susceptible this move along said beam, characterized in that, over most of its length, said beam is formed of two parallel spars and spaced one of the other defining between them a space and in that said carriage is mounted movable between said beams and extends at least partially in said space.

Selon un mode préféré, le dispositif, qui est installé dans une cabine de projection munie de moyens aptes à y créer un courant d'air dominant est caractérisé en ce que ladite poutre est disposée de sorte que ledit courant d'air dominant entraíne, dans l'espace défini entre les deux longerons, une circulation d'air ayant sensiblement le même sens que la projection de produit de revêtement.According to a preferred mode, the device, which is installed in a projection booth provided with means capable of creating a dominant draft is characterized in that said beam is arranged so that said air stream dominant leads, in the space defined between the two stringers, air circulation having substantially the same meaning that the projection of coating product.

Grâce à l'invention, l'écoulement d'air n'est que peu perturbé puisque le courant d'air dominant installé dans la cabine par le système de ventilation peut être maintenu jusqu'au voisinage du ou des projecteurs. Les turbulences n'ont plus tendance à salir les projecteurs, le chariot ou la poutre et les particules de poussière ou de produit de revêtement ne sont plus entraínées vers la surface à revêtir.Thanks to the invention, the air flow is only a little disturbed since the dominant air current installed in the cabin by ventilation system can be maintained to the vicinity of the projector (s). The turbulence no longer have a tendency to dirty headlights, cart or beam and particles of dust or product coating are no longer dragged toward the surface to put on.

Enfin, la poutre utilisée est de faible section, donc légère, ce qui diminue son inertie et permet d'optimiser le dimensionnement des portiques qui la supportent et des moteurs qui assurent son déplacement.Finally, the beam used is of small section, therefore light, which reduces its inertia and optimizes the dimensioning of the gantries which support it and the motors which ensure its movement.

Selon un mode particulier de réalisation du dispositif selon l'invention au moins une partie dudit chariot portant ledit projecteur est susceptible de mouvements perpendiculaires à l'axe de ladite poutre.According to a particular embodiment of the device according to the invention at least some of said carriage carrying said projector is capable of movements perpendicular to the axis of said beam.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaítront plus clairement à la lumière de la description qui va suivre de deux modes de réalisation d'un dispositif de projection de produit de revêtement conforme à son principe donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels:

  • la figure 1 est une vue schématique partielle d'une installation de revêtement de carrosseries d'automobiles selon l'invention;
  • la figure 2 est une vue schématique partielle en perspective de la poutre de la machine de toit de la figure 1;
  • la figure 3 est une section schématique de la figure 2 dans le plan horizontal contenant l'axe YY' et
  • les figures 4a et 4b sont des vue partielles en élévation suivant IV de la figure 2 du chariot et des deux longerons d'une variante de réalisation de l'invention.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of two embodiments of a coating product spraying device in accordance with its principle given solely by way of example and made with reference to the accompanying drawings in which:
  • Figure 1 is a partial schematic view of an installation for coating automobile bodies according to the invention;
  • Figure 2 is a partial schematic perspective view of the beam of the roof machine of Figure 1;
  • Figure 3 is a schematic section of Figure 2 in the horizontal plane containing the axis YY 'and
  • Figures 4 a and 4 b are partial elevational views along IV of Figure 2 of the carriage and the two side members of an alternative embodiment of the invention.

L'installation de la figure 1 est destinée au revêtement de carrosseries automobiles 1 portées par un convoyeur 2 le long d'un trajet suivant un axe XX'. Elle comprend, entre autres, deux portiques 3 et 4 disposés de part et d'autre du trajet du convoyeur et supportant une poutre 5 le long de laquelle un chariot 6 est susceptible de se déplacer. Le déplacement du chariot 6 lui permet de balayer toute la largeur de la carrosserie 1 afin de placer deux projecteurs 7 et 8 en regard de toutes les surfaces à revêtir. La poutre est rendue solidaire des portiques 2 et 4 par deux paliers 9 et 10 qui permettent de lui faire effectuer des mouvements de rotation autour d'un axe YY' parallèle à sa plus grande dimension. Les paliers 9 et 10, et par voie de conséquence la poutre 5 et les appareillages qu'elle porte, sont mobiles en altitude par rapport aux portiques 3 et 4, grâce à des systèmes d'entraínement connus, comme par exemple celui décrit dans la demande FR-A-27 14 853.The installation of figure 1 is intended for coating of automobile bodies 1 carried by a conveyor 2 along a path along an axis XX '. She includes, among other things, two gantry cranes 3 and 4 arranged on either side of the conveyor path and supporting a beam 5 along which a carriage 6 is susceptible to move. The movement of the carriage 6 allows it to sweep the entire width of the body 1 in order to place two projectors 7 and 8 facing all the surfaces to put on. The beam is made integral with the gantries 2 and 4 by two bearings 9 and 10 which allow it to be made perform rotational movements around an axis YY ' parallel to its largest dimension. Landings 9 and 10, and consequently the beam 5 and the apparatuses that she wears, are mobile in altitude compared to gantry cranes 3 and 4, thanks to drive systems known, such as that described in the application FR-A-27 14 853.

Un courant d'air dominant vertical de haut en bas dans le sens des flèches F est créé dans la cabine 14 de projection contenant l'installation grâce à un système de ventilation 15, par exemple comprenant une source d'air située dans le plenum, ou plafond de la cabine.A dominant vertical air flow from top to bottom in the direction of the arrows F is created in cabin 14 of projection containing the installation thanks to a ventilation 15, for example comprising an air source located in the plenum, or ceiling of the cabin.

Selon une caractéristique avantageuse de l'invention, les projecteurs 7 et 8 sont montés à l'extrémité d'une extension 11 aux extrémités d'un bras 12 monté pivotant en son milieu sur un poignet 13 muni d'un axe horizontal. Ce montage permet de faire varier l'altitude relative des projecteurs 7 et 8. De la sorte, il est possible, en fin de course du chariot 6 de faire descendre le projecteur extérieur le long du côté de la carrosserie afin d'obtenir un recouvrement partiel de la zone de revêtement avec celle d'un projecteur porté par une machine latérale et destiné à revêtir les côtés de la carrosserie. According to an advantageous characteristic of the invention, the projectors 7 and 8 are mounted at the end of a extension 11 at the ends of an arm 12 pivotally mounted in its middle on a wrist 13 provided with a horizontal axis. This mounting allows the relative altitude of the projectors 7 and 8. In this way, it is possible, at the end of carriage 6 travel to lower the projector outside along the side of the body in order to obtain partial overlap of the coating area with that a projector carried by a lateral machine and intended for line the sides of the body.

Sur la figure 2, la poutre 5 est représentée en perspective. Elle comporte, sur la plus grande partie de sa longueur, deux longerons 20 et 21, en résine de polyester ou époxyde chargée de fibre de verre, qui sont solidaires à leurs extrémités des paliers 9 et 10. Ils sont parallèles et espacés l'un de l'autre de manière à ménager entre eux un espace 22 dans lequel peut se déplacer l'extension 11 du chariot 6 à l'extrémité de laquelle sont logés les projecteurs 7 et 8. La partie supérieure 26 du chariot 6 a une largeur supérieure à celle de l'espace 22 et repose sur les longerons 20 et 21.In Figure 2, the beam 5 is shown in perspective. It includes, over most of its length, two side members 20 and 21, in polyester resin or glass fiber filled epoxy, which are integral with their ends of the bearings 9 and 10. They are parallel and spaced from each other so as to spare them a space 22 in which the extension 11 of the carriage 6 at the end of which are housed the projectors 7 and 8. The upper part 26 of the carriage 6 has a width greater than that of the space 22 and rests on the side members 20 and 21.

Le courant d'air créé dans l'ensemble de la cabine 14 et matérialisé par les flèches F remplit en permanence l'espace 22, ce qui a pour conséquence d'induire, au niveau des projecteurs 7 et 8 un courant d'air constant ayant tendance à entraíner les particules de peinture vers la carrosserie 1 visible sur la figure 1. Ainsi, le courant d'air ambiant n'est que peu perturbé au niveau des projecteurs 7 et 8.The air flow created throughout the cabin 14 and indicated by the arrows F constantly fills space 22, which has the effect of inducing, at the level projectors 7 and 8 a constant air flow having tendency to drag paint particles towards the body 1 visible in FIG. 1. Thus, the current ambient air is only slightly disturbed at the level of projectors 7 and 8.

Même en cas de mouvement rapide du chariot 6, il ne se crée pas de dépression sur la poutre 5 car le vide relatif qui aurait tendance à se former à l'arrière de l'extrémité de l'extension 11 est immédiatement comblé par l'air provenant de l'espace 22. Un quasi-équilibre permanent est ainsi atteint.Even in the event of rapid movement of the carriage 6, it does not creates no depression on the beam 5 because the relative vacuum which would tend to form at the back of the end of extension 11 is immediately filled with air from space 22. A permanent quasi-equilibrium is thus achieved.

Cette stabilité de l'écoulement d'air dans la zone de projection évite les recirculations du nuage comprenant des particules de produit de revêtement vers le haut de la cabine: les longerons 20 et 21 et le chariot 6 ne risquent pas d'être salis par des retours intempestifs de produit.This stability of the air flow in the area of projection avoids recirculations of the cloud including coating product particles to the top of the cabin: the side members 20 and 21 and the carriage 6 do not risk not to be soiled by untimely product returns.

De plus, la poutre ainsi constituée est symétrique par rapport à un plan vertical contenant l'axe YY'. Elle a la même influence aérodynamique et induit les mêmes contraintes d'inertie sur ses systèmes d'entraínement quel que soit son sens de rotation autour de l'axe YY'.In addition, the beam thus formed is symmetrical by relative to a vertical plane containing the axis YY '. She has the same aerodynamic influence and induces the same inertia constraints on its drive systems which that is its direction of rotation around the axis YY '.

Le chariot est entraíné en déplacement le long de l'axe YY' par un moteur électrique 23 situé dans un des paliers 9 ou 10 et entraínant deux poulies 24 et 25 auxquelles sont respectivement associées deux poulies folles 24' et 25' situées dans l'autre palier. Deux courroies 27 et 28 crantées et formant chacune une boucle fermée sont respectivement tendues entre les poulies 24 et 24' d'une part et 25 et 25' d'autre part. Elles sont logées dans les longerons 20 et 21 et leurs faces extérieures sont à l'air libre en regard, respectivement, de deux ouvertures 20A et 21A ménagées dans les parois supérieures des longerons. Les courroies 27 et 28 sont légèrement plus larges que les ouvertures 20A et 21A, ce qui permet de les recouvrir et obturer complètement. On évite ainsi que des salissures pénètrent dans les longerons 20 et 21.The carriage is driven in displacement along the axis YY 'by an electric motor 23 located in one of the bearings 9 or 10 and driving two pulleys 24 and 25 which are respectively associated with two pulleys crazy 24 'and 25' located in the other landing. Of them belts 27 and 28 notched and each forming a loop closed are tensioned respectively between the pulleys 24 and 24 'on the one hand and 25 and 25' on the other. They are housed in the longitudinal members 20 and 21 and their outer faces are in the open air opposite, respectively, two openings 20A and 21A formed in the upper walls of the stringers. Belts 27 and 28 are slightly more wider than the openings 20A and 21A, which allows them cover and seal completely. This avoids that dirt gets into the side members 20 and 21.

Le chariot 6, et en particulier sa partie supérieure 26, sont solidaires des deux courroies 27 et 28: ils sont déplacés suivant l'axe YY' par les mouvements des courroies. Des contrepoids 29, logés dans les longerons 20 et 21 sont déplacés en sens inverse du chariot 6 par les courroies 27 et 28, ce qui évite de soumettre les portiques 3 et 4 à des mouvements de balancier trop importants.The carriage 6, and in particular its upper part 26, are integral with the two belts 27 and 28: they are displaced along the axis YY 'by the movements of belts. Counterweights 29, housed in the longitudinal members 20 and 21 are moved in the opposite direction of the carriage 6 by the belts 27 and 28, which avoids subjecting the gantry cranes 3 and 4 to too great pendulum movements.

Les salissures éventuelles générées par ce système d'entraínement, du fait de la position des courroies 27 et 28 et de la rotation de la poutre 5 autour de l'axe YY', ne peuvent apparaítre que du côté opposé à l'objet à revêtir, ce qui évite qu'elles ne soient entraínées vers celui-ci.Any soiling generated by this system drive, due to the position of the belts 27 and 28 and the rotation of the beam 5 around the axis YY ', do not may appear only on the side opposite the object to be coated, which prevents them from being dragged towards it.

Des dérouleurs 30 et 31 sont respectivement logés dans les longerons 20 et 21 et contiennent les conduits d'alimentation en produit de revêtement et en air de pulvérisation et d'entraínement et éventuellement les câbles d'alimentation électrique dans le cas d'un dispositif de projection par voie électrostatique. Les dérouleurs, les conduits et les câbles sont complètement logés à l'intérieur de la poutre 5: ils sont protégés des salissures éventuelles et une fuite d'un des conduits ne résultera pas nécessairement en la pollution de la carrosserie en cours de revêtement. Uncoilers 30 and 31 are respectively housed in the side members 20 and 21 and contain the conduits coating product and air supply spraying and training and possibly the power cables in the case of a projection device by electrostatic means. The unwinders, conduits and cables are completely housed inside beam 5: they are protected from contamination and a leak in one of the pipes will not necessarily result in pollution of the bodywork in the course of coating.

Pour faciliter la maintenance de l'installation, et selon une caractéristique avantageuse de l'invention, on peut prévoir de séparer les conduits d'alimentation en produit de revêtement des autres conduits et câbles. Dans le cas particulier d'une installation de projection électrostatique de produit de revêtement, et du fait que les longerons sont en matériau isolant, il est alors possible de maintenir les dérouleurs et les conduits à des potentiels électriques différents.To facilitate maintenance of the installation, and according to an advantageous characteristic of the invention, one may plan to separate the supply lines in coating product for other conduits and cables. In the special case of a projection installation coating product, and the fact that the side members are made of insulating material, it is then possible to keep unwinders and ducts at different electrical potentials.

La section de l'extension 11 est visible à la figure 3. Ce profil est symétrique car le chariot est susceptible de déplacements dans les deux sens. Il a une forme oblongue destinée à limiter l'effet de compression/dépression de l'air situé dans l'espace 22 lors des déplacements du chariot 6 et donc à minimiser la formation de turbulences à l'arrière de l'extension 11 en mouvement. Ceci évite de perturber l'écoulement à l'extérieur de l'espace 22, et en particulier d'aspirer de l'air au voisinage des projecteurs 7 et 8.The section of extension 11 is visible in the figure 3. This profile is symmetrical because the carriage is susceptible travel in both directions. It has an oblong shape intended to limit the compression / depression effect of the air located in space 22 when the carriage 6 and therefore to minimize the formation of turbulence at the rear of extension 11 in motion. This avoids disturb the flow outside the space 22, and particular to draw air in the vicinity of the spotlights 7 and 8.

La variante des figures 4a et 4b diffère de celle des figures 1 à 3 en ce que la distance des projecteurs 7 et 8 par rapport à l'axe YY' est réglable. Les éléments identiques à ceux de la figure 2 portent les mêmes références numériques. Sur la figure 4a, la distance entre les projecteurs 7 et 8 et la poutre 5 est maximum. Sur la figure 4b, cette distance est diminuée, les projecteurs sont plus rapprochés de la poutre. Un moteur 101 associé à une vis à bille 102 est monté sur un chariot 106 solidaire des courroies 27 et 28. Un second chariot 116 solidaire de l'écrou de la vis à bille et supportant la partie supérieure 26 du chariot et l'extension 11 peut être déplacé en altitude sur des rails 103 et 104 portés par le chariot 106 et perpendiculaires à l'axe YY'.The variant of FIGS. 4 a and 4 b differs from that of FIGS. 1 to 3 in that the distance of the projectors 7 and 8 relative to the axis YY 'is adjustable. Elements identical to those in FIG. 2 have the same reference numbers. In FIG. 4 a , the distance between the projectors 7 and 8 and the beam 5 is maximum. In Figure 4b , this distance is reduced, the projectors are closer to the beam. A motor 101 associated with a ball screw 102 is mounted on a carriage 106 secured to the belts 27 and 28. A second carriage 116 secured to the nut of the ball screw and supporting the upper part 26 of the carriage and the extension 11 can be moved aloft on rails 103 and 104 carried by the carriage 106 and perpendicular to the axis YY '.

Ce mouvement de translation et le mouvement de rotation de l'arbre 12 autour du poignet 13 permettent de garder en permanence les projecteurs 7 et 8 à la distance optimale par rapport à l'objet à revêtir et perpendiculaires à celle-ci.This translational movement and the movement of rotation of the shaft 12 around the wrist 13 allow keep projectors 7 and 8 at a distance optimal in relation to the object to be coated and perpendicular to it.

Un résultat analogue pourrait être obtenu avec une extension 11 télescopique. Dans ce cas, seule l'extrémité de l'extension 11 portant les projecteurs est susceptible de mouvements perpendiculaires à l'axe YY'.A similar result could be obtained with a telescopic extension 11. In this case, only the end of extension 11 carrying the spotlights is likely of movements perpendicular to the axis YY '.

L'invention s'applique aussi bien à un dispositif de peinturage qu'à un dispositif de poudrage et peut être utilisée avec un ou des projecteur(s) pneumatique(s), rotatif(s), électrostatique(s) ou non. Son utilisation n'est pas limitée au domaine automobile mais s'étend à toutes les installations incorporant des machines de toit.The invention applies equally well to a device for painting only with a powder coating device and can be used with one or more pneumatic headlamp (s), rotary (s), electrostatic (s) or not. Its use is not limited to the automotive field but extends to all installations incorporating roof machines.

Bien que décrite en relation avec une poutre portant un unique chariot, l'invention s'applique aussi au cas de plusieurs chariots sur une poutre. Les mouvements de balayage des chariots sont alors de moindre amplitude.Although described in relation to a carrying beam a single carriage, the invention also applies to the case of several carriages on a beam. The movements of sweeping of the carriages are then of lesser amplitude.

Claims (10)

  1. Device for spraying a coating product, forming a roof machine comprising two frames (2, 3) supporting a beam (5) which can move vertically with respect to the said frames and rotationally about an axis (YY') parallel to its longest dimension, at least one carriage (6) carrying at least one sprayer (7, 8) being capable of moving along the said beam, characterized in that, over the greater part of its length, the said beam is formed from two parallel members (20, 21) which are spaced apart so as to define a space (22) between them and in that the said carriage is mounted so as to move between the said members and extends at least partially in the said space.
  2. Device according to Claim 1, installed in a spray booth provided with means capable of creating therein a dominant draught of air, characterized in that the said beam is arranged so that the said dominant draught of air (F) causes, in the space (22) defined between the two members, a flow of air having approximately the same direction as that of the said spraying of the coating product.
  3. Device according to Claim 2, characterized in that the said carriage (6) traverses right across the said space (22).
  4. Device according to Claim 1, characterized in that the said carriage is driven so as to move along the said beam (5) by a set of belts (27, 28) located away from the said sprayer (7, 8) with respect to the rotation axis (YY') of the said beam.
  5. Device according to Claim 4, characterized in that the said belts (27, 28) are housed in the said members (20, 21), the outer faces of the said belts being in the open air opposite, respectively, two openings (20A, 21A) made in the upper walls of the said members.
  6. Device according to Claim 1, characterized in that the said sprayer is housed on the end of an extension (11) of the said carriage located on the side facing the object (1) to be coated.
  7. Device according to Claim 6, characterized in that the sprayer (7, 8) is fixed to an arm (12) linked to the said extension (11) by a wrist (13) allowing the said arm to undergo a pivoting movement.
  8. Device according to Claim 6, characterized in that the said extension (11) is profiled so as to cause the minimum of aerodynamic disturbance while it is moving.
  9. Device according to Claim 1, characterized in that the hoses for supplying the coating product (30), on the one hand, and the hoses for supplying air and the electrical cables (31), on the other hand, are housed, respectively, in each of the two members (20, 21).
  10. Device according to Claim 1, characterized in that at least one part (116, 26, 11) of the said carriage carrying the said sprayer (7, 8) is capable of movements perpendicular to the axis (YY') of the said beam (5).
EP95400708A 1994-03-30 1995-03-29 Device for projecting a coating product Expired - Lifetime EP0674949B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9403751 1994-03-30
FR9403751A FR2718063B1 (en) 1994-03-30 1994-03-30 Coating product projection device.

Publications (2)

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EP0674949A1 EP0674949A1 (en) 1995-10-04
EP0674949B1 true EP0674949B1 (en) 1999-06-02

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US (1) US5630876A (en)
EP (1) EP0674949B1 (en)
DE (1) DE69509963D1 (en)
FR (1) FR2718063B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20160576A1 (en) * 2016-02-09 2017-08-09 Maema S R L Unipersonale MACHINE FOR SPRAYING PAINTS OR DUST ON THE SURFACES OF MANUFACTURES
CN107684997B (en) * 2017-05-25 2019-04-12 江苏景中景工业涂装设备有限公司 A kind of novel environment friendly spray-painting plant
CN110405420B (en) * 2019-08-01 2021-05-04 常熟市天盛钢结构有限公司 Machining process for steel structure net rack rod piece

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2321983A (en) * 1941-02-13 1943-06-15 Gen Motors Corp Roof spraying machine
US2744033A (en) * 1951-11-28 1956-05-01 Ransburg Electro Coating Corp Method and apparatus for spray coating of articles
US2764893A (en) * 1955-03-14 1956-10-02 Charles F Falkenberg Automobile washing device, including traveling carriage
US2911835A (en) * 1956-07-05 1959-11-10 Deering Milliken Res Corp Traversing arrangement
US3885066A (en) * 1972-11-24 1975-05-20 Ppg Industries Inc Method for coating continuously advancing substrate
US4133255A (en) * 1977-03-21 1979-01-09 Guice John J Paint spray booth and method of painting an article therein
US4233933A (en) * 1979-05-21 1980-11-18 Ford Motor Company Spray coating machine
US4901985A (en) * 1988-11-10 1990-02-20 Magneco/Metrel, Inc. Apparatus for spraying refractory lining
CA2051246C (en) * 1990-10-09 2000-02-29 Jeffrey R. Shutic Apparatus for mounting and moving coating dispensers
JP2811505B2 (en) * 1990-11-29 1998-10-15 エービービー・インダストリー株式会社 Painting equipment

Also Published As

Publication number Publication date
EP0674949A1 (en) 1995-10-04
US5630876A (en) 1997-05-20
FR2718063B1 (en) 1996-06-14
DE69509963D1 (en) 1999-07-08
FR2718063A1 (en) 1995-10-06

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