ES2366939T3

ES2366939T3 - COMPRESSED AIR LUSTRATED DEVICE PROVIDED WITH A REFIRGERATION MEDIA.

Info

Publication number: ES2366939T3
Application number: ES09163973T
Authority: ES
Inventors: Alain Rogy; Yves Neyrolles
Original assignee: Peugeot Citroen Automobiles SA
Current assignee: PSA Automobiles SA
Priority date: 2008-07-22
Filing date: 2009-06-29
Publication date: 2011-10-26
Anticipated expiration: 2029-06-29
Also published as: PT2147744E; EP2147744A1; ATE510657T1; FR2934189B1; EP2147744B1; FR2934189A1

Abstract

The apparatus (1) has air transporting units for transporting the air between an air exhausting unit and a header (3) and in the form of a flexible pipe (11) connecting the exhausting unit to periphery of a cylindrical skirt (4) in a manner to use the exhaust air to cool the head and an outer surface to be polished. The skirt has concentric internal and external walls, where the outer wall has an opening (20) for transportation of the air from the pipe in a space formed between the walls. The internal wall has a set of holes to radially distribute the air to an interior of the skirt.

Description

El dominio técnico del invento se refiere a los aparatos de pulido o lustrado o pulidoras, en particular utilizadas para superficies, sobre las que se ha depositado una película de pintura. Estos aparatos están particularmente adaptados a la industria del automóvil, durante la fase de pulido que interviene después de las operaciones de depósito de pintura. Generalmente, la operación de pulido engendra una serie de calentamientos locales, situados a la vez sobre la pulidora y sobre la superficie a lustrar, entrañando una degradación de la esponja de pulido y del estado superficial de la pieza a lustrar. Más específicamente, el invento se refiere por tanto a una pulidora dotada de un sistema de refrigeración. The technical domain of the invention relates to polishing or polishing apparatus or polishers, in particular used for surfaces, on which a paint film has been deposited. These devices are particularly adapted to the automotive industry, during the polishing phase that intervenes after the paint deposit operations. Generally, the polishing operation generates a series of local heating, located at the same time on the polisher and on the surface to be polished, resulting in a degradation of the polishing sponge and the surface state of the piece to be polished. More specifically, the invention therefore relates to a polisher equipped with a cooling system.

Para una mejor comprensión de la descripción, los términos «aparato de pulido» y «pulidora» son equivalentes. For a better understanding of the description, the terms "polishing apparatus" and "polishing machine" are equivalent.

Las pulidoras existen y han sido ya el objeto de patentes. Se puede, por ejemplo, citar la patente EP0691181B1, que se refiere a una pulidora neumática que dispone de un sistema de refrigeración por aire. El aire comprimido llega por una zona de conexión, luego el flujo es dividido en dos: un primer orificio permite alimentar el motor neumático y un segundo orificio permite llevar un flujo de aire al centro del disco de pulido. Este tipo de disposición permite enfriar el útil y la pieza. Polishers exist and have already been the subject of patents. It is possible, for example, to cite the patent EP0691181B1, which refers to a pneumatic polisher that has an air cooling system. The compressed air arrives through a connection zone, then the flow is divided into two: a first hole allows the pneumatic motor to be fed and a second hole allows an air flow to be brought to the center of the polishing disc. This type of arrangement allows the tool and the piece to cool.

Los aparatos de pulido según el invento, están también dotados de un sistema de refrigeración que permite enfriar el medio de pulido así como la superficie a lustrar, consistiendo dicho sistema en puncionar aire en el escape de dichos aparatos, y en reinyectarle al nivel de la cabeza de la pulidora que incluye el medio de filtrado. Este sistema de refrigeración se funda sobre una fuente energética ya existente, no entrañando ningún coste suplementario unido a la implantación de un motor específico, dedicado a esta función. Además, este sistema no engendra ningún volumen suplementario, unido a la elaboración de un circuito de refrigeración particular, ya que basta con una simple tubería de desviación de aire. The polishing apparatus according to the invention, are also provided with a cooling system that allows the polishing medium as well as the surface to be polished to cool, said system consisting of puncturing air in the exhaust of said apparatus, and injecting it at the level of the Polisher head that includes the filter media. This cooling system is based on an existing energy source, not entailing any additional cost associated with the implementation of a specific engine, dedicated to this function. In addition, this system does not generate any additional volume, together with the elaboration of a particular refrigeration circuit, since a simple air bypass pipe is sufficient.

El medio de pulido representa el material situado en la extremidad de la pulidora, que va a asegurar directamente la función de pulido contra la superficie a tratar. The polishing medium represents the material located at the end of the polisher, which will directly ensure the polishing function against the surface to be treated.

El presente invento está definido en la reivindicación 1. Tiene por objeto un aparato de pulido manual, dotado de un mango y de una cabeza, incluyendo dicho mango una conexión de alimentación de aire, un órgano de escape de aire, un motor, y un disparador o dispositivo de puesta en marcha de dicho motor, incluyendo dicha cabeza un faldón y un plato que soporta un medio de pulido. La principal característica de un aparato de pulido según el invento, es que comprende un medio de encaminamiento del aire entre el órgano de escape y la cabeza, de manera que utiliza el aire de escape para enfriar dicha cabeza así como la superficie exterior a lustrar. Dicho de otro modo, el aparato de pulido según el invento, está dotado de un sistema de refrigeración, cuya principal fuente energética está constituida por el aire de escape de este aparato. El principio del invento consiste así en hacer activa una fuente de fluido, que estaba destinada a perderse. El faldón es de forma cilíndrica y dispone de dos paredes concéntricas, incluyendo la pared externa una abertura que permite encaminar el aire, que proviene del tubo flexible, en el espacio situado entre las dos paredes, disponiendo la pared interna de una pluralidad de agujeros, para difundir radialmente el aire en el interior del faldón. The present invention is defined in claim 1. Its object is a manual polishing apparatus, provided with a handle and a head, said handle including an air supply connection, an air exhaust, an engine, and a trigger or device for starting said engine, said head including a skirt and a plate that supports a polishing means. The main characteristic of a polishing apparatus according to the invention is that it comprises a means of routing the air between the exhaust and the head, so that it uses the exhaust air to cool said head as well as the outer surface to be polished. In other words, the polishing apparatus according to the invention is provided with a cooling system, whose main energy source is constituted by the exhaust air of this apparatus. The principle of the invention thus consists in making a fluid source active, which was destined to be lost. The skirt is cylindrical in shape and has two concentric walls, including the outer wall an opening that allows the air to be routed, which comes from the flexible tube, in the space between the two walls, the inner wall having a plurality of holes, to radially diffuse the air inside the skirt.

Ventajosamente, el medio de encaminamiento del aire es exterior al aparato. Esta configuración permite simplificar la fabricación de dicho aparato, porque no necesita retocar la geometría y la disposición de las piezas constitutivas de dicho aparato, para habilitar un circuito suplementario de encaminamiento del aire en el interior de éste. Advantageously, the air routing means is external to the apparatus. This configuration makes it possible to simplify the manufacture of said apparatus, because it does not need to touch up the geometry and arrangement of the constituent parts of said apparatus, to enable a supplementary circuit for routing the air inside it.

De manera ventajosa, el medio de encaminamiento del aire es un tubo flexible que une el órgano de escape a la periferia del faldón. Advantageously, the air routing means is a flexible tube that joins the exhaust organ to the periphery of the skirt.

Preferiblemente, los agujeros de la pared interna están alineados entre sí, y están repartidos equitativamente alrededor de un círculo. Tal configuración permite un reparto homogéneo de la llegada de aire al faldón. Preferably, the holes in the inner wall are aligned with each other, and are evenly distributed around a circle. Such configuration allows a homogeneous distribution of the arrival of air to the skirt.

Ventajosamente, las dos paredes están unidas entre ellas, al nivel de su extremidad libre, por una pared anular calada o perforada. Advantageously, the two walls are connected to each other, at the level of their free end, by an open or perforated annular wall.

De manera preferente, la pared anular incluye una pluralidad de agujeros, repartidos equitativamente sobre su longitud. De esta manera, los agujeros de esta pared anular permiten una salida de aire según una dirección paralela al eje de rotación del faldón. Preferably, the annular wall includes a plurality of holes, evenly distributed over its length. In this way, the holes in this annular wall allow an air outlet in a direction parallel to the axis of rotation of the skirt.

De manera preferente, el plato se presenta bajo la forma de un disco macizo, cuyo eje de rotación se confunde con el eje de rotación del faldón, estando atravesado el plato, según su longitud, por una pluralidad de canales paralelos entre sí, y cuyos ejes longitudinales son paralelos al eje de rotación del faldón y del plato. De esta manera, el aire desviado por el tubo flexible, penetra primero en el faldón, luego pasa a través del plato para enfriarlo. Preferably, the plate is presented in the form of a solid disk, whose axis of rotation is confused with the axis of rotation of the skirt, the plate being crossed, according to its length, by a plurality of channels parallel to each other, and whose Longitudinal axes are parallel to the axis of rotation of the skirt and the plate. In this way, the air diverted by the flexible tube, penetrates the skirt first, then passes through the plate to cool it.

De manera ventajosa, el medio de pulido se presenta en forma de un cilindro atravesado, según su longitud, por una pluralidad de canales, estando fijado dicho medio de pulido sobre el plato de modo que los canales del plato y los de dicho medio, sean paralelos entre sí y en continuidad unos de otros. El aire, que ha atravesado así el plato, va igualmente a atravesar el medio de pulido para, a su vuelta, enfriarlo. El aire que proviene de este medio, va a proyectarse contra la superficie a lustrar, para enfriarla. Advantageously, the polishing medium is presented in the form of a cylinder crossed, according to its length, by a plurality of channels, said polishing means being fixed on the plate so that the channels of the plate and those of said medium are parallel to each other and in continuity of each other. The air, which has thus passed through the plate, will also pass through the polishing medium to cool it on its return. The air that comes from this medium, will be projected against the surface to be polished, to cool it.

Según un modo de realización preferido del invento, el plato es atravesado por seis canales. According to a preferred embodiment of the invention, the dish is crossed by six channels.

Preferentemente, el medio es una esponja de pulido. La esponja de pulido está particularmente adaptada al tratamiento de las superficies recubiertas por una película de pintura. Preferably, the medium is a polishing sponge. The polishing sponge is particularly adapted to the treatment of surfaces coated by a paint film.

Ventajosamente, el mango y la cabeza son perpendiculares entre sí. Esta forma de pistola es ergonómica, pues permite una mejor manipulación del aparato y por tanto un mejor control de la acción de pulido. Advantageously, the handle and the head are perpendicular to each other. This pistol shape is ergonomic, as it allows a better manipulation of the device and therefore a better control of the polishing action.

De manera preferente, el disparador es un gatillo. Preferably, the trigger is a trigger.

En relación a las pulidoras ya existentes, los aparatos de pulido según el invento, presentan la ventaja de poseer una función suplementaria, que es la del enfriamiento de su cabeza y de la superficie a lustrar, conservando un volumen constante. Además, presentan la ventaja de ser concebidos fácilmente, pues no presentan ninguna diferencia estructural fundamental con las ya existentes, si no es la adición de una tubería flexible, utilizada corrientemente para otras funciones. In relation to the existing polishers, the polishing apparatus according to the invention have the advantage of having a supplementary function, which is that of cooling their head and the surface to be polished, while maintaining a constant volume. In addition, they have the advantage of being easily conceived, since they do not present any fundamental structural difference with those already existing, if it is not the addition of a flexible pipe, commonly used for other functions.

Se da a continuación una descripción detallada de un modo de realización preferido de un aparato de pulido según el invento, con referencia a las figs. 1 a 2. A detailed description of a preferred embodiment of a polishing apparatus according to the invention is given below, with reference to figs. 1 to 2

--: La fig. 1 es una vista en perspectiva de un aparato de pulido según el invento. Fig. 1 is a perspective view of a polishing apparatus according to the invention.

--: La fig. 2 es una vista en corte de la cabeza de un aparato de pulido según el invento. Fig. 2 is a sectional view of the head of a polishing apparatus according to the invention.

Con referencia a la fig. 1, un aparato de pulido o lustrado 1 según el invento comprende un mango 2 prolongado por una cabeza 3, estando dispuestos estos dos elementos a 90º uno del otro. Sobre el mango 2, se sitúan la conexión de aire comprimido, el escape de aire situado en la extremidad libre de dicho mango 2, y un disparador, en forma de un gatillo, de un motor alojado en la mitad de este mango 2. El mango tiene globalmente una forma cilíndrica alargada, dotada de pequeños relieves de superficie, de manera que faciliten la aprehensión de la pulidora 1. La cabeza 3 comprende en particular, un faldón 4 cilíndrico provisto de una doble pared, un plato 5 y un medio 6 de filtrado constituido por una esponja de filtrado. With reference to fig. 1, a polishing or polishing apparatus 1 according to the invention comprises a handle 2 extended by a head 3, these two elements being arranged at 90 ° to each other. On the handle 2, the compressed air connection, the air exhaust located at the free end of said handle 2, and a trigger, in the form of a trigger, of an engine housed in the middle of this handle 2 are located. The handle generally has an elongated cylindrical shape, provided with small surface reliefs, so as to facilitate the apprehension of the polisher 1. The head 3 comprises in particular a cylindrical skirt 4 provided with a double wall, a plate 5 and a medium 6 of filtering constituted by a filtering sponge.

Con referencia a las figs. 1 y 2, el faldón 4 posee por tanto, un fondo plano 7, una pared interna 8 y una pared externa 9 concéntricas. La pared interna 8 dispone de una pluralidad de agujeros 10, alineados entre ellos, y repartidos equitativamente alrededor de la periferia de esta pared interna 8. La pared externa 9 incluye una abertura 20 en forma de una boquilla rígida, y está destinada a recibir un tubo 11 flexible, que proviene del escape de aire, situado sobre el mango 2. Las paredes interna 8 y externa 9 nacen en el fondo plano 7 del faldón 4, y tienen la misma longitud, representando esta longitud la dimensión de dicho faldón 4 tomada según su eje de rotación. Estas dos paredes 8, 9 se reúnen al nivel de su extremidad libre, por medio de una pared anular 12, que posee una pluralidad de agujeros 13 repartidos equitativamente sobre su longitud. De esta manera, el aire que proviene del escape invade el espacio libre 14 entre las dos paredes 8, 9 y escapa, por una parte, radialmente por los agujeros 10 de la pared interna 8, y, por otra parte, longitudinalmente por los agujeros 13 de la pared anular 12 que une las dos paredes 8, 9 concéntricas del faldón 4. El plato 5 se presenta en forma de un disco cilíndrico achaflanado. Dicho de otro modo, este plato 5 presenta dos superficies circulares 15, 16 concéntricas, de diámetros diferentes, y cuyas circunferencias están unidas entre ellas linealmente, sobre una vista en corte. El plato 5, que posee un eje de rotación confundido con el del faldón 4, es atravesado por seis canales 17 longitudinales, paralelos a dicho eje de rotación, estando repartidos equitativamente estos seis canales 17 alrededor de un círculo. La esponja 6 de filtrado, que es soportada por el plato 5, es cilíndrica, y posee un diámetro sensiblemente igual al de la superficie circular 16 más grande del plato 5. Esta esponja 6 de filtrado, que posee un eje de rotación confundido con el del faldón 4 y del plato 5, es atravesada por seis canales 18 longitudinales, paralelos a dicho eje de rotación, estando repartidos equitativamente estos seis canales 18 alrededor de un círculo. La esponja 6 está implantada sobre el plato 5, de modo que los canales 18 de dicha esponja 6 estén en la prolongación de los canales 17 de dicho plato 5. El plato 5 es posicionado sobre la cabeza 6 de la pulidora 1, de manera que emerja del faldón 4. With reference to figs. 1 and 2, the skirt 4 therefore has a flat bottom 7, an internal wall 8 and an outer wall 9 concentric. The inner wall 8 has a plurality of holes 10, aligned with each other, and distributed equally around the periphery of this inner wall 8. The outer wall 9 includes an opening 20 in the form of a rigid nozzle, and is intended to receive a flexible tube 11, which comes from the air exhaust, located on the handle 2. The inner and outer walls 8 are born in the flat bottom 7 of the skirt 4, and have the same length, this length representing the dimension of said skirt 4 taken according to its axis of rotation. These two walls 8, 9 meet at the level of their free end, by means of an annular wall 12, which has a plurality of holes 13 evenly distributed over its length. In this way, the air that comes from the exhaust invades the free space 14 between the two walls 8, 9 and escapes, on the one hand, radially through the holes 10 of the inner wall 8, and, on the other hand, longitudinally through the holes 13 of the annular wall 12 that joins the two concentric walls 8, 9 of the skirt 4. The plate 5 is in the form of a chamfered cylindrical disk. In other words, this plate 5 has two concentric circular surfaces 15, 16 of different diameters, and whose circumferences are connected to each other linearly, on a sectional view. The plate 5, which has an axis of rotation confused with that of the skirt 4, is crossed by six longitudinal channels 17, parallel to said axis of rotation, these six channels 17 being equally distributed around a circle. The filter sponge 6, which is supported by the plate 5, is cylindrical, and has a diameter substantially equal to that of the larger circular surface 16 of the plate 5. This filter sponge 6, which has a rotation axis confused with the of the skirt 4 and of the plate 5, it is crossed by six longitudinal channels 18, parallel to said axis of rotation, these six channels 18 being distributed equally around a circle. The sponge 6 is implanted on the plate 5, so that the channels 18 of said sponge 6 are in the extension of the channels 17 of said plate 5. The plate 5 is positioned on the head 6 of the polisher 1, so that emerge from the skirt 4.

Con referencia a la fig. 1, la pulidora 1 incluye un tubo 11 flexible, convencional, que une el escape de aire situado sobre el mango 2, a la abertura 20 practicada en la pared externa 9 del faldón 4. Este tubo 11, una de cuyas extremidades está introducida en la abertura 20 en forma de una boquilla rígida, está destinado a encaminar el aire de escape de la pulidora 1, hacia el faldón 4, con el fin de enfriar la esponja 6 de filtrado, así como la superficie del objeto a lustrar. With reference to fig. 1, the polisher 1 includes a flexible, conventional tube 11, which joins the air exhaust located on the handle 2, to the opening 20 made in the outer wall 9 of the skirt 4. This tube 11, one of whose limbs is inserted into The opening 20 in the form of a rigid nozzle, is intended to route the exhaust air of the polisher 1, towards the skirt 4, in order to cool the filter sponge 6, as well as the surface of the object to be polished.

El modo de funcionamiento de un aparato 1 de pulido según el invento es el siguiente. El operario coge la pulidora 1 por el mango 2, y aproxima la cabeza 3 de dicha pulidora 1, a la superficie a tratar. Acciona el gatillo para poner en marcha el aparato 1. El plato 5 y la esponja 6 de filtrado se ponen a girar en contacto con la superficie a lustrar, mientras que el aire de escape es puncionado por el tubo 11 flexible para ser llevado al faldón 4. El aire es entonces soplado al interior del faldón 4, a través de los agujeros 10 de su pared interna 8, y hacia la superficie a tratar, a través de los agujeros 13 de la pared anular 12. Es igualmente soplado al interior del plato 5 y de la esponja 6 de filtrado, a través de los canales 17, 18 longitudinales que los atraviesan. De esta manera, la superficie a lustrar es enfriada, así como la esponja de filtrado 6 y el plato 5 que la soporta, pudiendo este enfriamiento traducirse en una bajada de temperatura del orden de 20º C sobre estos elementos diferentes. The mode of operation of a polishing apparatus 1 according to the invention is as follows. The operator takes the polisher 1 by the handle 2, and approaches the head 3 of said polisher 1, to the surface to be treated. Press the trigger to start the apparatus 1. The plate 5 and the filter sponge 6 are rotated in contact with the surface to be polished, while the exhaust air is punctured by the flexible tube 11 to be taken to the skirt 4. The air is then blown into the skirt 4, through the holes 10 of its inner wall 8, and into the surface to be treated, through the holes 13 of the annular wall 12. It is also blown into the interior of the plate 5 and the filter sponge 6, through the longitudinal channels 17, 18 that pass through them. In this way, the surface to be polished is cooled, as well as the filter sponge 6 and the plate 5 that supports it, and this cooling can result in a temperature drop of the order of 20 ° C on these different elements.

Claims

1.- A manual polishing or polishing apparatus (1), provided with a handle (2) and a head (3), said handle (2) including an air supply connection, an air exhaust organ, a motor, and a trigger of said motor, said head (3) including a skirt (4) and a plate (5) supporting a polishing means (6), said apparatus including a means (11) for routing the air between the exhaust organ and head (3) in the form of a tube

(11) flexible that joins the exhaust organ to the periphery of the skirt (4), so that it uses the exhaust air to cool said head (3) as well as the outer surface to be polished, characterized in that the skirt (4) is cylindrical in shape and has two concentric walls (8, 9), including the outer wall (9) an opening (20) that allows air to be routed, which comes from the flexible tube (11), to the space (14) located between the two walls (8, 9), and because the inner wall (8) has a plurality of holes (10), to radially diffuse the air inside the skirt (4).

2. A polishing apparatus according to claim 1, characterized in that the air routing means (11) is external to the apparatus.

3. A polishing apparatus according to claim 1, characterized in that the holes (10) of the inner wall (8) are aligned with each other, and are evenly distributed around a circle.

4. A polishing apparatus according to any one of claims 1 or 3, characterized in that the two walls (8, 9) are connected to each other, at the level of their free end, by an annular wall (12).

5. A polishing apparatus according to claim 4, characterized in that the annular wall (12) includes a plurality of holes (13), distributed equally over its length.

6. A polishing apparatus according to any one of claims 1 to 5, characterized in that the plate (5) is in the form of a solid disk, whose axis of rotation is confused with the axis of rotation of the skirt (4), and because the plate (5) is crossed, according to its length, by a plurality of channels (17) parallel to each other, and whose longitudinal axes are parallel to the axis of rotation of the skirt (4) and of the plate (5).

7. A polishing apparatus according to claim 6, characterized in that the polishing means (6) is in the form of a cylinder crossed, according to its length, by a plurality of channels (18), said means (6) being fixed polishing on the plate (5) so that the channels (17) of the plate and the channels (18) of said means (6) are parallel to each other and in continuity with each other.

8. A polishing apparatus according to any one of claims 6 or 7, characterized in that the plate (5) is crossed by six channels.

9. An apparatus according to any one of the preceding claims, characterized in that the medium is a polishing sponge (6).

10. An apparatus according to any one of the preceding claims, characterized in that the handle (2) and the head (3) are perpendicular to each other.

11. An apparatus according to any one of the preceding claims, characterized in that the trigger is a trigger.