WO1999006252A1 - Motor vehicle windscreen wiper comprising a liquid spraying device and method for producing a functional section in such a spraying device - Google Patents

Motor vehicle windscreen wiper comprising a liquid spraying device and method for producing a functional section in such a spraying device Download PDF

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Publication number
WO1999006252A1
WO1999006252A1 PCT/FR1998/001669 FR9801669W WO9906252A1 WO 1999006252 A1 WO1999006252 A1 WO 1999006252A1 FR 9801669 W FR9801669 W FR 9801669W WO 9906252 A1 WO9906252 A1 WO 9906252A1
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WO
WIPO (PCT)
Prior art keywords
pipe
functional section
producing
spraying device
wiping
Prior art date
Application number
PCT/FR1998/001669
Other languages
French (fr)
Inventor
Patrice Reilhac
Richard Raynaud
Laurent Lefrancois
Original Assignee
Valeo Systemes D'essuyage
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 Valeo Systemes D'essuyage filed Critical Valeo Systemes D'essuyage
Publication of WO1999006252A1 publication Critical patent/WO1999006252A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/52—Arrangement of nozzles; Liquid spreading means
    • B60S1/522—Arrangement of nozzles; Liquid spreading means moving liquid spreading means, e.g. arranged in wiper arms

Definitions

  • the invention relates to a device for wiping a window of a motor vehicle comprising an improved sprinkler device.
  • the invention relates more particularly to a device for wiping a window of a motor vehicle, of the type comprising a device for watering the window which is carried by a windscreen wiper and which comprises a tubular duct in which circulates liquid pressure washing.
  • the sprinkler device sweeps the window at the same time as the wiper and therefore allows a much more homogeneous distribution of the liquid over the entire surface of the wiping glass.
  • known sprinkler devices generally comprise at least one spray nozzle, possibly produced in the form of a ramp, and a flexible pipe which extends along the wiper and which is connected to a pressure washing liquid supply device, which is generally installed inside the vehicle.
  • the projection nozzle and the pipe must therefore be fixed to the wiper by various means such as collars or staples which surround both a portion of the wiper and the component to be fixed.
  • male and female connection end pieces must be provided when these cannot be produced integrally with one or the other of the two components.
  • the object of the invention is therefore to propose a new design for a wiping system in which the sprinkler device comprises a very small number of components which make it possible to reduce significant the cost of assembling the sprinkler device while preserving a low manufacturing cost of each of its components
  • the invention provides a device for wiping a window, in particular for a motor vehicle, provided with a device for watering the window supplied by a pipe through which pressurized washing liquid circulates, characterized in that the pipeline comprises longitudinal immobilization means made of material
  • the pipeline crosses a wall of the wiping device and in that the pipeline has two radial collars which are each supported longitudinally on either side of the wall
  • the pipe has a longitudinal end in the form of a connection piece
  • the invention also relates to a method for producing a functional section on a pipe which supplies a device for watering a vehicle window with pressurized washing liquid, comprising in particular a first step which consists in producing a tubular preform, characterized in that it comprises at least a second step which consists in deforming the tubular preform by thermoforming
  • the rib is formed and in that, in a third step, the rib is punched to form a spray orifice
  • the functional section allows the immobilization of the pipe in a device for wiping the glass - the functional section realizes a longitudinal immobilization
  • FIG. 1 is a perspective view with cutaway of a motor vehicle windscreen wiper according to the teachings of the invention
  • - Figure 2 is a perspective view illustrating the functional section of the watering system of the wiper of Figure 1;
  • FIG. 3 is a perspective view illustrating one end of the pipe in the form of a nozzle for the connection of the section with a washing liquid spraying device;
  • - Figure 4 is a partial perspective view illustrating a second longitudinal end of the pipe in the form of a nozzle for its connection with a flexible pipe for supplying washing liquid
  • - Figure 5 is a longitudinal sectional view illustrating more particularly means of axial locking of the pipe with respect to a wiper arm provided with a housing in which extends the functional section;
  • FIG. 6A to 6D illustrate four alternative embodiments of a longitudinal end of a functional section forming a projection nozzle
  • FIG. 7A to 7C illustrate three alternative embodiments of a longitudinal end of the pipe in the form of connection piece; and - Figures 8A to 8D illustrate in cross section four steps of a method of producing a spray orifice arranged in the functional section according to the invention.
  • a wiper 1 0 which essentially comprises a wiper arm 1 2 at a front end 14 which is articulated, via a connector 16, a wiper blade window 1 8.
  • the wiper arm 12 is intended to be fixed by its rear longitudinal end 20 to an alternating sweep drive system which allows it to sweep the surface of a window to be wiped (not shown) d 'a motor vehicle.
  • the wiper
  • 1 0 carries a device for watering the window which comprises a pipe 22 for supplying pressurized washing liquid itself connected to a flexible pipe 24.
  • the pipe 22 comprises sections or functional areas (s) which ensure on the one hand the fixing of the pipe 22 and on the other hand the distributipn of the washing liquid.
  • the wiper arm 12 is produced in the form of a casing which delimits a housing internal 26 substantially closed, which housing 26 extends over the entire length of arm 20.
  • the arm 1 2 may also have a housing which is open downwards in the direction of the window to be wiped.
  • These functional areas include in particular a front longitudinal end 28 for connection to the connector 16, which at the same time forms a device for spraying washing liquid, a rear longitudinal end 30 for connection to the flexible supply pipe 24, and means 32 for longitudinal locking of the pipe 22 in the housing 26 of the arm 1 2.
  • a semi-rigid material it is allowed that the functional areas do not deform over time, even under the effect of the pressure of the washing liquid.
  • the flexibility of the material is sufficient for the pipe 22 to be able to follow the generally curved shape of the arm 12.
  • FIG. 3 shows more precisely the end 28 of the pipe 22 which allows connection to the connector 16 .
  • the connector 1 6 is a plastic part which at the same time forms a projection nozzle.
  • the connector 16 has an internal channel which opens outwards through spray holes 34 and which is capable of being supplied with washing liquid by a male tubular nozzle 36.
  • the nozzle 36 which extends longitudinally towards the rear comprises, at its free end, a bulge and the end 28 of the pipe 22 is correspondingly shaped so that it can be fitted elastically onto the end piece 36 while ensuring both the longitudinal fixing of the pipe 22 relative to connector 16 and the tightness of the connection thus made.
  • FIG 4 there is shown more precisely the rear end 30 of the pipe 22 which is shaped as a male connection piece.
  • the flexible pipe 24 is capable of being force-fitted onto the end 30 in the form of a tip, ensuring both the axial fixing of the flexible pipe 24 on the end piece 30 and the sealing of the connection thus performed.
  • the rear end 30 of the section 22 extends outside the internal housing 26 of the arm 12.
  • the recess 38 is separated from the housing 26 by a transverse wall 40 through which the functional section 22 extends.
  • the means 32 for longitudinal locking of the pipe 22 are produced in the form of two external radial collars 42 which are produced integrally with the functional section 22 and which are axially supported each on one side of the transverse wall 40 to prevent any longitudinal movement of the pipe 22.
  • the functional section 22 is made of thermoplastic plastic.
  • tubular preform 45 for example by technological extrusion, which makes it possible to obtain large production capacities at low cost.
  • This preform 45 is then debited in a series of sections of length adapted to the length of the wiper on which is intended to be mounted the sprinkler device.
  • thermoforming technique makes it possible to produce functional zones of very varied shapes as can be seen in the examples of FIGS. 6A to 6D and 7A to 7C in which different alternative embodiments of a longitudinal end of a section have been shown respectively functional, acting respectively as a projection nozzle and connection end piece.
  • the front end 28 of the pipe 22 can be shaped so as to have one or more holes, for example directed downwards or forwards to spray washing liquid directly on the glass without it being necessary to provide a projection nozzle.
  • the geometry of the liquid jet thus projected depends on the shape of the holes, various examples of which are illustrated in FIGS. 6A to 6D.
  • the functional section 22 may include spray holes 44 which are arranged in parts of the pipe 22 which are directly opposite the window. A method of producing such spray orifices 44 is illustrated in FIGS. 8A to 8D.
  • the method consists first of all in producing a tubular cylindrical preform 45, for example of revolution, very easily obtained by extrusion. Then, by a thermoforming operation, the side wall of the pipe 22 is pinched to form on the one hand a longitudinal rib 46 and, on the other hand, on the opposite, a flat 48. To form the orifice spray 44, the longitudinal rib 46 thus formed is punched in a transverse direction substantially tangent to the functional section as shown in Figure 8C.
  • this process is particularly advantageous since the drop of material thus punched is not likely to be entrained inside the pipe 22 as it is likely to be the case if the orifice d 'sprinkling 44 is achieved by drilling or radial punching.
  • the flat surface 48 makes it possible in particular to angularly orient the pipe 22 around its longitudinal axis so that the spray orifices 44 are turned without fail in the direction of the window to be wiped. Means for indexing the angular position of the pipe 22 are thus produced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Nozzles (AREA)

Abstract

The invention concerns a windscreen wiper, in particular for motor vehicle, provided with a device for spraying the windscreen supplied by a conduit (22) wherein circulates a pressurised washing liquid, characterised in that the conduit (22) comprises integral longitudinal blocking means (42). The invention also concerns a method for producing a functional section on a conduit (22) supplying the windscreen sprayer with pressurised washing liquid, comprising in particular a first step consisting in producing a tubular preform, characterised in that it comprises at least a second step consisting in deforming the tubular preform by thermoforming.

Description

"Dispositif d'essuyage d'une vitre de véhicule automobile comportant un dispositif d'arrosage et procédé de réalisation d'un tronçon fonctionnel dans un tel dispositif d'arrosage." "Device for wiping a window of a motor vehicle comprising a sprinkler device and method for producing a functional section in such a sprinkler device."
L'invention concerne un dispositif d'essuyage d'une vitre de véhicule automobile comportant un dispositif d'arrosage perfectionné.The invention relates to a device for wiping a window of a motor vehicle comprising an improved sprinkler device.
L'invention concerne plus particulièrement un dispositif d'essuyage d'une vitre de véhicule automobile, du type comportant un dispositif d'arrosage de la vitre qui est porté par un essuie-glace et qui comporte une canalisation tubuiaire dans laquelle circule du liquide de lavage sous pression.The invention relates more particularly to a device for wiping a window of a motor vehicle, of the type comprising a device for watering the window which is carried by a windscreen wiper and which comprises a tubular duct in which circulates liquid pressure washing.
Il a déjà été proposé de nombreux dispositifs d'arrosage destinés à être fixés sur un essuie-glace afin de pouvoir projeter du liquide de lavage sur la vitre en étant très proche de celle-ci Ainsi, on évite que les filets d'air, qui s'écoulent le long du pare-brise lorsque le véhicule roule, ne puissent perturber ou dévier exagérément le liquide de lavage projetéNumerous watering devices have already been proposed intended to be fixed to a windscreen wiper in order to be able to spray washing liquid onto the window while being very close to it. This prevents the air streams, flowing along the windshield when the vehicle is running, cannot disturb or excessively deflect the projected washing liquid
Par ailleurs, en disposant le dispositif d'arrosage sur l'essuie-glace, le dispositif d'arrosage balaye la vitre en même temps que l'essuie-glace et permet donc une répartition beaucoup plus homogène du liquide sur toute la surface de la vitre à essuyer.Furthermore, by placing the sprinkler device on the wiper, the sprinkler device sweeps the window at the same time as the wiper and therefore allows a much more homogeneous distribution of the liquid over the entire surface of the wiping glass.
Cependant, de tels dispositifs d'arrosage sont généralement chers et complexes à assembler car ils font appel à de nombreux composants.However, such sprinklers are generally expensive and complex to assemble because they use many components.
En effet, les dispositifs d'arrosage connus comportent généralement au moins une buse de projection, éventuellement réalisée sous la forme d'une rampe, et une canalisation souple qui s'étend le long de l'essuie- glace et qui est reiiée à un dispositif d'alimentation en liquide de lavage sous pression, lequel est généralement installé à l'intérieur du véhicule.In fact, known sprinkler devices generally comprise at least one spray nozzle, possibly produced in the form of a ramp, and a flexible pipe which extends along the wiper and which is connected to a pressure washing liquid supply device, which is generally installed inside the vehicle.
La buse de projection et la canalisation doivent par conséquent être fixées sur l'essuie-glace par divers moyens tels que des colliers ou des agrafes qui entourent à la fois une portion de l'essuie-glace et le composant à fixer.The projection nozzle and the pipe must therefore be fixed to the wiper by various means such as collars or staples which surround both a portion of the wiper and the component to be fixed.
De plus, pour relier les différents composants entre eux, il faut prévoir des embouts de raccordement mâle et femelle lorsque ceux-ci ne peuvent être réalisés venus de matière avec l'un ou l'autre des deux composantsIn addition, to connect the various components together, male and female connection end pieces must be provided when these cannot be produced integrally with one or the other of the two components.
L'invention a donc pour objet de proposer une nouvelle conception d'un système d'essuyage dans lequel le dispositif d'arrosage comporte un nombre très réduit de composants qui permettent de réduire de manière importante le coût d'assemblage du dispositif d'arrosage tout en préservant un bas coût de fabrication de chacun de ses composantsThe object of the invention is therefore to propose a new design for a wiping system in which the sprinkler device comprises a very small number of components which make it possible to reduce significant the cost of assembling the sprinkler device while preserving a low manufacturing cost of each of its components
Dans ce but, l'invention propose un dispositif d'essuyage d'une vitre, notamment pour véhicule automobile, pourvu d'un dispositif d'arrosage de la vitre alimenté par une canalisation dans laquelle circule du liquide de lavage sous-pression, caractérisé en ce que la canalisation comporte des moyens d'immobilisation longitudinale venus de matièreTo this end, the invention provides a device for wiping a window, in particular for a motor vehicle, provided with a device for watering the window supplied by a pipe through which pressurized washing liquid circulates, characterized in that the pipeline comprises longitudinal immobilization means made of material
Selon des caractéristiques avantageusesAccording to advantageous characteristics
- la canalisation traverse une paroi du dispositif d'essuyage et en ce que la canalisation comporte deux collets radiaux qui sont chacun en appui longitudinalement de part et d'autre de la paroi- The pipeline crosses a wall of the wiping device and in that the pipeline has two radial collars which are each supported longitudinally on either side of the wall
- la canalisation comporte une extrémité longitudinale en forme d'embout de raccordement- the pipe has a longitudinal end in the form of a connection piece
L'invention concerne également un procédé de réalisation d'un tronçon fonctionnel sur une canalisation qui alimente un dispositif d'arrosage d'une vitre de véhicule en liquide de lavage sous pression, comportant notamment une première étape qui consiste à réaliser une préforme tubuiaire, caractérisé en ce qu'il comporte au moins une deuxième étape qui consiste à déformer la préforme tubuiaire par thermoformage AvantageusementThe invention also relates to a method for producing a functional section on a pipe which supplies a device for watering a vehicle window with pressurized washing liquid, comprising in particular a first step which consists in producing a tubular preform, characterized in that it comprises at least a second step which consists in deforming the tubular preform by thermoforming Advantageously
- la deuxième étape, la nervure est formée et en ce que, dans une troisième étape, la nervure est poinçonnée pour former un orifice d'aspersion- the second step, the rib is formed and in that, in a third step, the rib is punched to form a spray orifice
- le tronçon fonctionnel permet le raccordement à une canalisation souple- the functional section allows connection to a flexible pipe
- le tronçon fonctionnel permet une raccordement à un dispositif d'aspersion- the functional section allows connection to a spraying device
- le tronçon fonctionnel permet l'immobilisation de la canalisation dans un dispositif d'essuyage de la vitre - le tronçon fonctionnel réalise une immobilisation longitudinale- the functional section allows the immobilization of the pipe in a device for wiping the glass - the functional section realizes a longitudinal immobilization
- le tronçon fonctionnel permet l'indexation de la position angulaire de la canalisation- the functional section allows indexing of the angular position of the pipe
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui suit pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels 'Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which '
- la figure 1 est une vue en perspective avec arrachement d'un essuie-glace de véhicule automobile conforme aux enseignements de l'invention , - la figure 2 est une vue en perspective illustrant le tronçon fonctionnel du système d'arrosage de l'essuie-glace de la figure 1 ;FIG. 1 is a perspective view with cutaway of a motor vehicle windscreen wiper according to the teachings of the invention, - Figure 2 is a perspective view illustrating the functional section of the watering system of the wiper of Figure 1;
- la figure 3 est une vue en perspective illustrant une extrémité de la canalisation en forme d'embout pour le raccordement du tronçon avec un dispositif de projection de liquide de lavage ;- Figure 3 is a perspective view illustrating one end of the pipe in the form of a nozzle for the connection of the section with a washing liquid spraying device;
- la figure 4 est une vue partielle en perspective illustrant une seconde extrémité longitudinale de la canalisation en forme d'embout pour son raccordement avec une canalisation souple d'alimentation en liquide de lavage ; - la figure 5 est une vue en coupe longitudinale illustrant plus particulièrement des moyens de blocage axial de la canalisation par rapport à un bras d'essuie-glace muni d'un logement dans lequel s'étend le tronçon fonctionnel ;- Figure 4 is a partial perspective view illustrating a second longitudinal end of the pipe in the form of a nozzle for its connection with a flexible pipe for supplying washing liquid; - Figure 5 is a longitudinal sectional view illustrating more particularly means of axial locking of the pipe with respect to a wiper arm provided with a housing in which extends the functional section;
- les figures 6A à 6D illustrent quatre variantes de réalisation d'une extrémité longitudinale d'un tronçon fonctionnel formant buse de projection ;- Figures 6A to 6D illustrate four alternative embodiments of a longitudinal end of a functional section forming a projection nozzle;
- les figures 7A à 7C illustrent trois variantes de réalisation d'une extrémité longitudinale de la canalisation en forme d'embout de raccordement ; et - les figures 8A à 8D illustrent en section transversale quatre étapes d'un procédé de réalisation d'un orifice d'aspersion aménagé dans le tronçon fonctionnel selon l'invention.- Figures 7A to 7C illustrate three alternative embodiments of a longitudinal end of the pipe in the form of connection piece; and - Figures 8A to 8D illustrate in cross section four steps of a method of producing a spray orifice arranged in the functional section according to the invention.
On a représenté sur la figure 1 un essuie-glace 1 0 qui comporte essentiellement un bras d'essuie-glace 1 2 à une extrémité avant 14 duquel est articulé, par l'intermédiaire d'un connecteur 16, un balai d'essuie-glace 1 8. Le bras d'essuie-glace 12 est destiné à être fixé par son extrémité longitudinale arrière 20 sur un système d'entraînement en balayage alterné qui lui permet de balayer la surface d'une vitre à essuyer (non représentée) d'un véhicule automobile. Conformément aux enseignements de l'invention, l'essuie-glaceThere is shown in Figure 1 a wiper 1 0 which essentially comprises a wiper arm 1 2 at a front end 14 which is articulated, via a connector 16, a wiper blade window 1 8. The wiper arm 12 is intended to be fixed by its rear longitudinal end 20 to an alternating sweep drive system which allows it to sweep the surface of a window to be wiped (not shown) d 'a motor vehicle. In accordance with the teachings of the invention, the wiper
1 0 porte un dispositif d'arrosage de la vitre qui comporte une canalisation 22 d'alimentation en liquide de lavage sous pression elle- même raccordée à une canalisation souple 24.1 0 carries a device for watering the window which comprises a pipe 22 for supplying pressurized washing liquid itself connected to a flexible pipe 24.
La canalisation 22 comporte des tronçons ou zones fonctionnel(le)s qui assurent d'une part la fixation de la canalisation 22 et d'autre part la distributipn du liquide de lavage.The pipe 22 comprises sections or functional areas (s) which ensure on the one hand the fixing of the pipe 22 and on the other hand the distributipn of the washing liquid.
Dans l'exemple de réalisation de l'invention, le bras d'essuie- glace 12 est réalisé sous la forme d'un carter qui délimite un logement interne 26 sensiblement fermé, lequel logement 26 s'étend sur toute la longueur du bras 20.In the embodiment of the invention, the wiper arm 12 is produced in the form of a casing which delimits a housing internal 26 substantially closed, which housing 26 extends over the entire length of arm 20.
Toutefois, le bras 1 2 peut aussi présenter un logement qui soit ouvert vers le bas en direction de la vitre à essuyer. Conformément aux enseignements de l'invention , la canalisationHowever, the arm 1 2 may also have a housing which is open downwards in the direction of the window to be wiped. In accordance with the teachings of the invention, the pipe
22 est réalisé dans une matière plastique semi-rigide et les zones fonctionnelles sont réalisées venues de matière , c'est-à-dire réalisées sans ajout d'une pièce supplémentaire.22 is made of a semi-rigid plastic and the functional areas are made of material, that is to say made without adding an additional part.
Ces zones fonctionnelles com portent notamment une extrémité longitudinale avant 28 de raccordement au connecteur 1 6, lequel forme en même temps un dispositif de projection de liquide de lavage, une extrémité longitudinale arrière 30 de raccordement à la canalisation souple d'alimentation 24, et des moyens 32 de blocage longitudinal de la canalisation 22 dans le logement 26 du bras 1 2. En utilisant une matière semi-rigide, on permet que les zones fonctionnelles ne se déforment pas au cours du temps, même sous l'effet de la pression du liquide de lavage. Toutefois, la souplesse du matériau est suffisante pour que la canalisation 22 puisse épouser la forme généralement courbe du bras 1 2. On a représenté sur la figure 3 de manière plus précise l'extrémité 28 de la canalisation 22 qui permet le raccordement au connecteur 16.These functional areas include in particular a front longitudinal end 28 for connection to the connector 16, which at the same time forms a device for spraying washing liquid, a rear longitudinal end 30 for connection to the flexible supply pipe 24, and means 32 for longitudinal locking of the pipe 22 in the housing 26 of the arm 1 2. By using a semi-rigid material, it is allowed that the functional areas do not deform over time, even under the effect of the pressure of the washing liquid. However, the flexibility of the material is sufficient for the pipe 22 to be able to follow the generally curved shape of the arm 12. FIG. 3 shows more precisely the end 28 of the pipe 22 which allows connection to the connector 16 .
Le connecteur 1 6 est une pièce en matière plastique qui forme en même temps une buse de projection. Le connecteur 16 comporte un canal interne qui débouche vers l'extérieur par des trous d'aspersion 34 et qui est susceptible d'être alimenté en liquide de lavage par un embout tubuiaire mâle 36. L'embout 36, qui s'étend longitudinalement vers l'arrière, comporte, à son extrémité libre, un renflement et l'extrémité 28 de la canalisation 22 est conformée de manière correspondante afin de pouvoir être emboîtée élastiquement sur l'embout 36 en assurant à la fois la fixation longitudinale de la canalisation 22 par rapport au connecteur 16 et l'étanchéité du raccordement ainsi effectué.The connector 1 6 is a plastic part which at the same time forms a projection nozzle. The connector 16 has an internal channel which opens outwards through spray holes 34 and which is capable of being supplied with washing liquid by a male tubular nozzle 36. The nozzle 36, which extends longitudinally towards the rear comprises, at its free end, a bulge and the end 28 of the pipe 22 is correspondingly shaped so that it can be fitted elastically onto the end piece 36 while ensuring both the longitudinal fixing of the pipe 22 relative to connector 16 and the tightness of the connection thus made.
Sur la figure 4, on a représenté de manière plus précise l'extrémité arrière 30 de la canalisation 22 qui est conformée en embout de raccordement mâle. Ainsi, la canalisation souple 24 est susceptible d'être emmanchée à force sur l'extrémité 30 en forme d'em bout, assurant à la fois la fixation axiale de la canalisation souple 24 sur l'embout 30 et l'étanchéité du raccordement ainsi effectué. Comme on peut le voir sur cette figure, l'extrémité arrière 30 du tronçon 22 s'étend à l'extérieur d u logement interne 26 du bras 1 2.In Figure 4, there is shown more precisely the rear end 30 of the pipe 22 which is shaped as a male connection piece. Thus, the flexible pipe 24 is capable of being force-fitted onto the end 30 in the form of a tip, ensuring both the axial fixing of the flexible pipe 24 on the end piece 30 and the sealing of the connection thus performed. As can be seen in this figure, the rear end 30 of the section 22 extends outside the internal housing 26 of the arm 12.
Toutefois, pour des raisons d'esthétique, elle est reçue dans un renfoncement 38 aménagé dans la surface externe de l'extrémité arrière 20 du bras 1 2 afin d'être dissimulée.However, for aesthetic reasons, it is received in a recess 38 arranged in the external surface of the rear end 20 of the arm 12 in order to be concealed.
Comme on peut le voir plus particulièrement sur la figure 5, le renfoncement 38 est séparé du logement 26 par une paroi transversale 40 au travers de laquelle s'étend le tronçon fonctionnel 22.As can be seen more particularly in FIG. 5, the recess 38 is separated from the housing 26 by a transverse wall 40 through which the functional section 22 extends.
Les moyens 32 de blocage longitudinal de la canalisation 22 sont réalisés sous la forme de deux collets radiaux externes 42 qui sont réalisés venus de matière avec le tronçon fonctionnel 22 et qui sont en appui axialement chacun d'un côté de la paroi transversale 40 pour interdire tout mouvement longitudinal de la canalisation 22.The means 32 for longitudinal locking of the pipe 22 are produced in the form of two external radial collars 42 which are produced integrally with the functional section 22 and which are axially supported each on one side of the transverse wall 40 to prevent any longitudinal movement of the pipe 22.
Selon un aspect de l'invention , le tronçon fonctionnel 22 est réalisé en matière plastique thermoplastique.According to one aspect of the invention, the functional section 22 is made of thermoplastic plastic.
En effet, il est ainsi possible de réaliser tout d'abord une préforme tubuiaire 45 , par exemple par extrusion technologique , qui permet d'obtenir de grandes capacités de production à faible coût.Indeed, it is thus possible first of all to produce a tubular preform 45, for example by technological extrusion, which makes it possible to obtain large production capacities at low cost.
Cette préforme 45 est alors débitée en une série de tronçons de longueur adaptée à la longueur de l'essuie-glace sur lequel est destiné à être monté le dispositif d'arrosage.This preform 45 is then debited in a series of sections of length adapted to the length of the wiper on which is intended to be mounted the sprinkler device.
Ensuite, grâce au caractère thermopiastique de la matière constituant cette préforme 45, les zones fonctionnelles de chacun des tronçons ainsi obtenus sont réalisées par thermoformage. La technique de thermoformage permet de réaliser des zones fonctionnelles de formes très variées comme on peut le voir sur les exemples des figures 6A à 6D et 7A à 7C dans lesquelles on a représenté respectivement différentes variantes de réalisation d'une extrémité longitudinale d'un tronçon fonctionnel faisant office respectivement de buse de projection et d'embout de raccordement.Then, thanks to the thermopiastic nature of the material constituting this preform 45, the functional zones of each of the sections thus obtained are produced by thermoforming. The thermoforming technique makes it possible to produce functional zones of very varied shapes as can be seen in the examples of FIGS. 6A to 6D and 7A to 7C in which different alternative embodiments of a longitudinal end of a section have been shown respectively functional, acting respectively as a projection nozzle and connection end piece.
En effet, l'extrémité avant 28 de la canalisation 22 peut être conformée de manière à présenter un ou plusieurs trous, par exemple dirigés vers le bas ou vers l'avant pour projeter du liquide de lavage directement sur la vitre sans qu'il soit nécessaire de prévoir une buse de projection. La géométrie du jet de liquide ainsi projeté dépend de la forme des trous dont divers exemples sont illustrés aux figures 6A à 6D. Selon un autre aspect de l'invention , le tronçon fonctionnel 22 peut comporter des orifices d'aspersion 44 qui sont aménagés dans des parties de la canalisation 22 qui sont directement en regard de la vitre. Un procédé de réalisation de tels orifices d'aspersion 44 est illustré sur les figures 8A à 8D.Indeed, the front end 28 of the pipe 22 can be shaped so as to have one or more holes, for example directed downwards or forwards to spray washing liquid directly on the glass without it being necessary to provide a projection nozzle. The geometry of the liquid jet thus projected depends on the shape of the holes, various examples of which are illustrated in FIGS. 6A to 6D. According to another aspect of the invention, the functional section 22 may include spray holes 44 which are arranged in parts of the pipe 22 which are directly opposite the window. A method of producing such spray orifices 44 is illustrated in FIGS. 8A to 8D.
Comme on peut le voi r sur la figure 8A, le procédé consiste tout d'abord à réaliser une préforme cylindrique tubuiaire 45, par exemple de révolution, obtenue très aisément par extrusion. Ensuite, par une opération de thermoformage, la paroi latérale de la canalisation 22 est pincée pour former d'une part une nervure longitudinale 46 et, d'autre part, à l'opposé, un méplat 48. Pour former l'orifice d'aspersion 44, la nervure longitudinale 46 ainsi formée est poinçonnée selon une direction transversale sensiblement tangente au tronçon fonctionnel ainsi que cela est représenté sur la figure 8C .As can be seen in FIG. 8A, the method consists first of all in producing a tubular cylindrical preform 45, for example of revolution, very easily obtained by extrusion. Then, by a thermoforming operation, the side wall of the pipe 22 is pinched to form on the one hand a longitudinal rib 46 and, on the other hand, on the opposite, a flat 48. To form the orifice spray 44, the longitudinal rib 46 thus formed is punched in a transverse direction substantially tangent to the functional section as shown in Figure 8C.
Comme on peut le voir sur la figure 8D, ce procédé est particulièrement avantageux car la chute de matière ainsi poinçonnée ne risque pas d'être entraînée à l'intérieur de la canalisation 22 comme cela risque d'être le cas si l'orifice d'aspersion 44 est réalisé par perçage ou poinçonnage radial.As can be seen in FIG. 8D, this process is particularly advantageous since the drop of material thus punched is not likely to be entrained inside the pipe 22 as it is likely to be the case if the orifice d 'sprinkling 44 is achieved by drilling or radial punching.
On évite ainsi que les copeaux n'obstruent la circulation du liquide à l'intérieur de la canalisation 22.This prevents the chips from obstructing the circulation of the liquid inside the pipe 22.
Par ailleurs, le méplat 48 permet notamment d'orienter angulairement la canalisation 22 autour de son axe longitudinal pour que les orifices d'aspersion 44 soient tournés à coup sûr en direction de la vitre à essuyer. On réalise ainsi des moyens d'indexation de la position angulaire de la canalisation 22. Furthermore, the flat surface 48 makes it possible in particular to angularly orient the pipe 22 around its longitudinal axis so that the spray orifices 44 are turned without fail in the direction of the window to be wiped. Means for indexing the angular position of the pipe 22 are thus produced.

Claims

REVEN DICATI ONS REVENUE DICATI ONS
1 . Dispositif d'essuyage d'une vitre, notamment pour véhicule automobile, pourvu d'un dispositif d'arrosage de la vitre alimenté par une canalisation (22) dans laquelle circule du liquide de lavage sous- pression, caractérisé en ce que la canalisation (22) comporte des moyens (42) d'immobilisation longitudinale venus de matière.1. Device for wiping a window, in particular for a motor vehicle, provided with a device for watering the window supplied by a pipe (22) in which pressurized washing liquid flows, characterized in that the pipe ( 22) comprises means (42) of longitudinal immobilization made of material.
2. Dispositif d'essuyage selon la revendication 1 , caractérisé en ce que la canalisation (22) traverse une paroi (40) du dispositif d'essuyage et en ce que la canalisation (22) comporte deux collets radiaux (42) qui sont chacun en appui longitudinalement de part et d'autre de la paroi (40) .2. Wiping device according to claim 1, characterized in that the pipe (22) passes through a wall (40) of the wiping device and in that the pipe (22) comprises two radial collars (42) which are each supported longitudinally on either side of the wall (40).
3. Dispositif d'essuyage selon la revendication 1 ou 2, caractérisé en ce que la canalisation (22) com porte une extrémité longitudinale (28, 30) en forme d'embout de raccordement.3. A wiping device according to claim 1 or 2, characterized in that the pipe (22) com carries a longitudinal end (28, 30) in the form of connection piece.
4. Procédé de réalisation d'un tronçon fonctionnel sur une canalisation (22) qui alimente un dispositif d'arrosage d'une vitre de véhicule en liquide de lavage sous pression, comportant notamment une première étape qui consiste à réaliser une préforme tubuiaire (45) , caractérisé en ce qu'il comporte au moins une deuxième étape qui consiste à déformer la préforme tubuiaire (45) par thermoformage.4. Method for producing a functional section on a pipe (22) which supplies a device for watering a vehicle window with pressurized washing liquid, comprising in particular a first step which consists in producing a tubular preform (45 ), characterized in that it comprises at least a second step which consists in deforming the tubular preform (45) by thermoforming.
5. Procédé selon la revendication 4, caractérisé en ce qu'au cours de la deuxième étape, la nervure (46) est formée et en ce que, dans une troisième étape, la nervure (46) est poinçonnée pour former un orifice d'aspersion (44).5. Method according to claim 4, characterized in that during the second step, the rib (46) is formed and in that, in a third step, the rib (46) is punched to form an orifice sprinkling (44).
6. Procédé selon la revendication 4, caractérisé en ce que le tronçon fonctionnel permet le raccordement à une canalisation souple (24). 6. Method according to claim 4, characterized in that the functional section allows connection to a flexible pipe (24).
7. Procédé selon la revendication 4, caractérisé en ce que le tronçon fonctionnel permet une raccordement à un dispositif d'aspersion (1 6) .7. Method according to claim 4, characterized in that the functional section allows a connection to a spray device (1 6).
8. Procédé selon la revendication 4, caractérisé en ce que le tronçon fonctionnel permet l'immobilisation de la canalisation (22) dans un dispositif d'essuyage de la vitre.8. Method according to claim 4, characterized in that the functional section allows the immobilization of the pipe (22) in a device for wiping the glass.
9. Procédé selon la revendication 8, caractérisé en ce que le tronçon fonctionnel réalise une immobilisation longitudinale. 9. Method according to claim 8, characterized in that the functional section performs a longitudinal immobilization.
1 0. Procédé selon la revendication 4, caractérisé en ce que le tronçon fonctionnel permet l'indexation de la position angulaire de la canalisation (22). 1 0. Method according to claim 4, characterized in that the functional section allows the indexing of the angular position of the pipe (22).
PCT/FR1998/001669 1997-07-31 1998-07-28 Motor vehicle windscreen wiper comprising a liquid spraying device and method for producing a functional section in such a spraying device WO1999006252A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR97/09767 1997-07-31
FR9709767A FR2766777B1 (en) 1997-07-31 1997-07-31 SYSTEM FOR WIPING A WINDOW OF A MOTOR VEHICLE COMPRISING AN IMPROVED WATERING DEVICE

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WO1999006252A1 true WO1999006252A1 (en) 1999-02-11

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FR (1) FR2766777B1 (en)
WO (1) WO1999006252A1 (en)

Cited By (2)

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EP3138745B1 (en) 2015-09-07 2018-10-17 Valeo Systèmes d'Essuyage Wiper device for cleaning vehicle windows
DE102018007917A1 (en) * 2018-10-08 2020-04-09 A. Raymond Et Cie Attachment for a wiper arm

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DE10229236A1 (en) * 2002-06-28 2004-01-29 Robert Bosch Gmbh Wiper arm for a vehicle wiper
DE102015114923A1 (en) * 2015-09-07 2017-03-09 Valeo Systèmes d'Essuyage Wiper device for cleaning vehicle windows and cleaning device for a wiper device

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US3887956A (en) * 1973-10-18 1975-06-10 Lescoa Inc Windshield wiper fluid dispenser
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DE4415081A1 (en) * 1994-04-29 1995-11-02 Teves Gmbh Alfred Wiper arm, in particular for motor vehicles
EP0693359A1 (en) * 1994-07-18 1996-01-24 Nobel Plastiques Method and device for thermoforming a plastic pipe
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FR1307974A (en) * 1961-09-18 1962-11-03 Improvements to windshield washer systems for vehicles
US3887956A (en) * 1973-10-18 1975-06-10 Lescoa Inc Windshield wiper fluid dispenser
DE2912631A1 (en) * 1979-03-30 1980-10-02 Wuenstel Franz Dipl Oec Ing Gr Washer facility for windscreen wiper - has perforated tube clipped to side of wiper blade
DE3226185A1 (en) * 1982-07-13 1984-01-19 Kramer-Werke GmbH, 7770 Überlingen Hose piece and arrangement for its attachment
FR2600026A1 (en) * 1986-06-16 1987-12-18 Sefi Soc Europ Fab Ind Spray nozzle for equipping motor vehicle windscreen wipers
DE4415081A1 (en) * 1994-04-29 1995-11-02 Teves Gmbh Alfred Wiper arm, in particular for motor vehicles
EP0693359A1 (en) * 1994-07-18 1996-01-24 Nobel Plastiques Method and device for thermoforming a plastic pipe
FR2727365A1 (en) * 1994-11-29 1996-05-31 Valeo Systemes Dessuyage Windscreen wiper to be attached to vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3138745B1 (en) 2015-09-07 2018-10-17 Valeo Systèmes d'Essuyage Wiper device for cleaning vehicle windows
DE102018007917A1 (en) * 2018-10-08 2020-04-09 A. Raymond Et Cie Attachment for a wiper arm
US11465589B2 (en) 2018-10-08 2022-10-11 A. Raymond Et Cie Attachment for a wiper arm

Also Published As

Publication number Publication date
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FR2766777A1 (en) 1999-02-05

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