EP0563215A1 - Portable electric sander. - Google Patents

Portable electric sander.

Info

Publication number
EP0563215A1
EP0563215A1 EP92902141A EP92902141A EP0563215A1 EP 0563215 A1 EP0563215 A1 EP 0563215A1 EP 92902141 A EP92902141 A EP 92902141A EP 92902141 A EP92902141 A EP 92902141A EP 0563215 A1 EP0563215 A1 EP 0563215A1
Authority
EP
European Patent Office
Prior art keywords
handle
motor
arm
abrasive
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92902141A
Other languages
German (de)
French (fr)
Other versions
EP0563215B1 (en
Inventor
Olivier Meffre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0563215A1 publication Critical patent/EP0563215A1/en
Application granted granted Critical
Publication of EP0563215B1 publication Critical patent/EP0563215B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/04—Rigid drums for carrying flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/06—Portable grinding machines, e.g. hand-guided; Accessories therefor with abrasive belts, e.g. with endless travelling belts; Accessories therefor

Definitions

  • the present invention relates to portable electric sanders, that is to say devices provided with an electric motor and making it possible to sand and grate or also to polish and polish materials.
  • portable electric sanders rotate an abrasive disc around an axis which may be perpendicular to that of the motor or in its extension. These devices are relatively bulky, and above all, produce circular wear of the worked material, which scratch and damage it.
  • sanders comprising a strip formed of abrasive material, stretched by a set of cylinders and rotating thereon.
  • Such devices are however heavy and complicated.
  • This sander comprises an electric motor, the central assembly of which is rigidly fixed to a housing, and constitutes a stator, while the peripheral assembly, mounted on the housing by means of bearings, constitutes a rotor and drives in rotation, by its outer surface, a closed loop abrasive band, which surrounds it and is stretched by an idler roller mounted at one end of the case.
  • Handles also carried by the case, allow it to be held for work.
  • An electrical power cable is attached to the housing, which carries a switch.
  • the rotor may have an abrasive surface, in an unspecified manner, this abrasive surface coming to attack the part to be treated through an opening of a flat sole which forms part of the housing, and which rests on the surface to be treated during work.
  • a handle and a holding button are carried by the housing, and the power supply cable also terminates in the housing, which also carries a switch.
  • the object of the invention is to provide an apparatus which is at the same time lighter, more manageable and simpler than the known apparatuses, while allowing the treatment of surfaces of various shapes, including concaves, and capable of providing improved security. .
  • the invention therefore provides a device for sanding, grating, polishing and buffing materials, comprising an electric motor comprising a central assembly and a peripheral assembly, which can rotate relative to each other about a common axis , the device being provided with a handle adapted to be grasped with one hand, this handle being fixedly connected to the central assembly, known as the "stator" of the engine, and the external surface of the peripheral assembly known as "rotor" of the motor, carrying an abrasive material, this device comprising a rigid arm directly and fixedly connecting one end of the handle to one end of the stator, the rotor being rotatably mounted only on the stator.
  • the abrasive material is suitable for the intended work, for example the bristles of a brush are made of an abrasive material suitable for polishing or buffing.
  • the basic idea of the present invention therefore lies in the elimination of the housing, which, in the provisions of the prior art, served to support at least the stator, in a fixed manner, by means of bearings, the handle and the arrival of the power cable.
  • the housing is replaced by a simple rigid arm. The simplification and simplification are obvious.
  • the motor is powered by an independent source
  • the latter is housed in the handle, and connected to the motor by a cable fixed along the arm.
  • a switch and / or a dimmer can be provided in the handle. Provision may be made for the arm to be unique, which gives the advantage of allowing work to be carried out on the inside corners of the surface to be treated.
  • the arm is Y-shaped, each of the branches of which is fixed to one end of the axis of the stator and the center is fixed to the handle.
  • one of the arms of the Y-shaped arm is articulated and opens so as to allow the mounting of the abrasive material.
  • an electrical connection can be provided at the point where the branch opens which interrupts the motor supply when the branch is open.
  • one or two auxiliary handles, articulated or not, are fixed to the arm or at least to a branch thereof to allow better control.
  • a cylinder of abrasive material is preformed separately and is threaded onto the "rotor", of which it can be made integral by grooves formed along the internal surface of the abrasive cylinder and the surface external of the "rotor” or by pistons fixed on a base of the cylinder of the "rotor” and coming to be embedded in housings made in a base of the abrasive cylinder.
  • the abrasive material consists of a flexible sheet which is wound on two half-cylinders, one secured to the "rotor” and the other articulated on the previous one by a hinge.
  • the two ends of the flexible abrasive sheet are fixed in a groove-shaped clamp incorporated in a roller, which is itself integrated in the cylinder of the "rotor” to the right of the end without hinge of the fixed half-cylinder.
  • a retractable key placed at the end of this roller allows it to rotate on its axis, which causes the abrasive sheet to be wound around it, the progressive tension of which around the two half-cylinders causes their complete closure on the "rotor ".
  • a ratchet at the end of the race keeps them in place.
  • the outer surface of the two half-cylinders can be covered with a flexible material, such as, for example, woolen sheepskin or polyurethane foam.
  • the two half-cylinders can be replaced by two fractions of cylinders of unequal dimensions, the smallest being articulated on the largest and the two assemblies forming a complete cylinder, the rest of the device and its operation are identical to those of the previous one.
  • the roller for tensioning the sheet of abrasive material is replaced by a split axis in its length in which the two ends of the abrasive sheet are threaded. This axis is rotated around itself using the same type of key attached to one of its ends.
  • the abrasive material consists of a flexible self-adhesive sheet which is wound on the cylinder of the "rotor" while adhering to it.
  • the operator holds the device by the handle and starts it by opening the switch or the variator, which starts the engine.
  • the axis of the engine being held fixed by the handle, it is the "rotor" which starts to rotate and causes the rotation of the air cylinder. It only remains for the operator to press this abrasive cylinder on the work surface to obtain the desired effect.
  • Figure 1 shows, in perspective, the motor and the abrasive roller before its installation.
  • Figure 2 shows the whole device, in side view.
  • Figure 3 shows the entire device of Figure 2, seen in a perpendicular direction, with the separate abrasive roller.
  • Figure 4 shows the same set, in perspective.
  • Figure 5 and 6 show, respectively in perspective and seen at the end, a variant of the motor and the abrasive roller.
  • the device of FIGS. 1 to 4 comprises an electric motor of cylindrical shape, of a known type, formed essentially a central assembly or “stator” 1 and a peripheral assembly or “rotor” 2.
  • a cylinder of abrasive material 3 for example of metal coated with abrasive material of a known type, is threaded around the "rotor" 2 of the motor, of which it is made integral by ribs and grooves 4A, 4B along the internal surface of the abrasive cylinder 3 and the external surface of the "rotor" 2.
  • a handle 5 is extended by an arm 6 fixed to the axis of stator 1, of which it is integral.
  • Figure 3 shows that the arm 6 has two branches 6A, 6B, one of which, 6B, opens by means of a hinge 7, so as to allow the mounting of the abrasive cylinder 3 and, if necessary, the erasure complete of this branch to allow to go in the corners.
  • the motor is supplied with electric current by a conductor 8 of a known type passing through the handle 5, and in the branch 6A, which is hollow.
  • the ignition and the speed of rotation are determined by a switch / variator 9, of known type, fixed on the handle 5.
  • the power cable 8 or one of its conductors passes along the articulated branch 6B, and ends in a connection which opens when the branch 6B is removed from the stator 1, which makes it possible to change the abrasive cylinder without any risk of inadvertent restarting of the engine.
  • the arm 6 can carry one or more complementary handles, articulated or not, 10 and 11 (FIG. 3), which allow a better support; it can also have only one branch 6A, the articulated branch 6B being eliminated.
  • a biocable articulation 12 visible in FIG. 2, makes it possible to vary the orientation of the handle 5 relative to the arm 6, for better comfort of use.
  • a protector 13 which has the shape of a spherical dome, fixed on the front part of the handle 5 and which serves to avoid the risk of projection of debris towards the hand of the operator or even accidental contact of this hand with the abrasive cylinder.
  • the existence of such a risk results from the removal of the casing provided for in the devices of the prior art.
  • the abrasive cylinder has a particular structure. It comprises, in fact, a smooth part 3A which extends over most of its length, and an abrasive part 3B, of short length and of larger diameter, which is used to sand the bottom of a groove.
  • Figures 4 and 5 show a second embodiment; it differs from the previous one with its variants only in the method of fixing the abrasive cylinder.
  • This cylinder is composed of a flexible sheet 16 of abrasive material of a known type which is wrapped around two half-cylinders, one 17 fixed to the "rotor" 2, the other 18 fixed to 17 by a hinge 19.
  • a roller 21 split lengthwise along a groove 20, receives the two ends of the sheet 16.
  • the sheet 16 is wound up until the two half cylinders 17 and 18 come together so as to form a single cylinder which a pawl 23 keeps closed.
  • the device is then ready to operate like that of FIGS. 1 to 3 and can be the subject of the same variants.
  • An improvement of this device consists in covering the external surface of the half-cylinders 17 and 18 with a flexible material 24, for example woolen sheepskin or polyurethane foam, so as to obtain a good tension of the abrasive sheet. 16 and a good surface quality at closure between the two half-cylinders.
  • FIG. 5 represents, in perspective, the articulation of the half-cylinders surrounded by the abrasive sheet, without the rotor, axis, arm and handle.
  • Figure 6 shows the end of the entire device without the arm and the handle, which are identical to those of Figures 2 to 4 and may be subject to the same variants.
  • the abrasive cylinder 3, or the flexible sheet 16 may carry brush bristles of appropriate hardness, constituting a soft abrasive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

Ponceuse électrique portative comprenant un moteur dont l'équipage central (1), ou "stator", est relié de façon fixe à une poignée (5) par un bras (6), de préférence à deux branches (6A, 6B) dont une peut être écartée du stator. L'équipage périphérique (2) du moteur, ou "rotor", porte sur sa surface extérieure un abrasif, de préférence sous forme d'un rouleau (3) amovible. Le câble électrique d'alimentation (8), quand il y en a un, passe avantageusement à travers la poignée (5) et le long du bras (6).Portable electric sander comprising a motor whose central assembly (1), or "stator", is fixedly connected to a handle (5) by an arm (6), preferably with two branches (6A, 6B), one of which can be moved away from the stator. The peripheral assembly (2) of the motor, or "rotor", carries an abrasive on its outer surface, preferably in the form of a removable roller (3). The electric power cable (8), when there is one, advantageously passes through the handle (5) and along the arm (6).

Description

PONCEUSE ELECTRIQUE PORTATIVE La présente invention concerne les ponceuses électriques portatives, c'est-à-dire des dispositifs pourvus d'un moteur électrique et permettant de poncer et râper ou aussi de polir et lustrer des matériaux. Les ponceuses électriques portatives connues les plus courantes font tourner un disque abrasif autour d'un axe qui peut être perpendiculaire à celui du moteur ou dans son prolongement. Ces appareils sont relativement encombrants, et surtout, produisent une usure circulaire du matériau travaillé, ce qui le raye et l'abîme. The present invention relates to portable electric sanders, that is to say devices provided with an electric motor and making it possible to sand and grate or also to polish and polish materials. The most common known portable electric sanders rotate an abrasive disc around an axis which may be perpendicular to that of the motor or in its extension. These devices are relatively bulky, and above all, produce circular wear of the worked material, which scratch and damage it.
Ce dernier inconvénient est corrigé sur des ponceuses comportant une bande formée de matériau abrasif, tendue par un jeu de cylindres et tournant sur ceux-ci. De tels appareils sont cependant lourds et compliqués. On peut citer, par exemple, la ponceuse décrite dans FR-A-1.055.527. Cette ponceuse comprend un moteur électrique dont l'équipage central est fixé rigidement à un boîtier, et constitue un stator, alors que l'équipage périphérique, monté sur le boîtier par l'intermédiaire de roulements, constitue un rotor et entraine en rotation, par sa surface externe, une bande abrasive en boucle fermée, qui l'entoure et est tendue par un rouleau fou monté à une extrémité du boîtier. Des poignées, portées également par le boîtier, permettent de tenir celui-ci pour le travail. Un câble d'alimentation électrique est fixé au boîtier, qui porte un interrupteur.This latter drawback is corrected on sanders comprising a strip formed of abrasive material, stretched by a set of cylinders and rotating thereon. Such devices are however heavy and complicated. We can cite, for example, the sander described in FR-A-1,055,527. This sander comprises an electric motor, the central assembly of which is rigidly fixed to a housing, and constitutes a stator, while the peripheral assembly, mounted on the housing by means of bearings, constitutes a rotor and drives in rotation, by its outer surface, a closed loop abrasive band, which surrounds it and is stretched by an idler roller mounted at one end of the case. Handles, also carried by the case, allow it to be held for work. An electrical power cable is attached to the housing, which carries a switch.
Dans ce dispositif, l'adoption d'un stator central a permis un allégement de l'ensemble, par suppression d'un arbre d'entraînement sortant du moteur. L'emploi d'un rouleau tendeur permet de traiter même des surfaces concaves, si leur rayon est supérieur à celui du rouleau. Cependant, l'appareil est compliqué et lourd, donc peu maniable. En outre, la disposition du câble d'alimentation crée un risque de le voir venir en contact avec la bande abrasive. Le document US-A-1.980.056 propose, lui aussi, un appareil à stator central, c'est-à-dire avec l'équipage central du moteur fixe par rapport au boîtier, et l'équipage périphérique monté rotatif sur le même boîtier, grâce à des roulements. Il est prévu que, pour le ponçage, le rotor peut présenter une surface abrasive, de façon non précisée, cette surface abrasive venant attaquer la pièce à traiter à travers une ouverture d'une semelle plane qui fait partie du boîtier, et qui repose sur la surface à traiter pendant le travail. Une poignée et un bouton de maintien sont portés par le boîtier, et le câble d'alimentation électrique aboutit également au boîtier, qui porte aussi un interrupteur.In this device, the adoption of a central stator has made it possible to lighten the assembly, by removing a drive shaft exiting the engine. The use of a tension roller allows even concave surfaces to be treated, if their radius is greater than that of the roller. However, the device is complicated and heavy, therefore not very handy. In addition, the arrangement of the power cable creates a risk of it coming into contact with the abrasive belt. The document US-A-1.980.056 also proposes a central stator device, that is to say with the central crew of the motor fixed relative to the housing, and the peripheral crew rotatably mounted on the same housing, thanks to bearings. It is intended that, for sanding, the rotor may have an abrasive surface, in an unspecified manner, this abrasive surface coming to attack the part to be treated through an opening of a flat sole which forms part of the housing, and which rests on the surface to be treated during work. A handle and a holding button are carried by the housing, and the power supply cable also terminates in the housing, which also carries a switch.
Ce dispositif est un peu plus simple que le précédent, car il ne comporte pas de rouleau tendeur, mais son boîtier est lourd et encombrant et peu maniable, en outre sa semelle empêche l'utilisation pour traiter des surfaces non planes. Il présente le même défaut que le précédent en ce qui concerne la sécurité. L'invention a pour but de fournir un appareil qui soit à la fois plus léger, plus maniable et plus simple que les appareils connus, tout en permettant le traitement de surfaces de formes variées, y compris concaves, et aptes à procurer une sécurité améliorée. L'invention fournit en conséquence un dispositif permettant de poncer, râper, polir et lustrer des matériaux, comportant un moteur électrique comprenant un équipage central et un équipage périphérique, pouvant tourner l'un par rapport à l'autre autour d'un axe commun, le dispositif étant pourvu d'une poignée adaptée à être saisie avec une main, cette poignée étant reliée de façon fixe à l'équipage central, dit "stator" du moteur, et la surface externe de l'équipage périphérique dit "rotor" du moteur, portant une matière abrasive, ce dispositif comprenant un bras rigide reliant directement et de façon fixe une extrémité de la poignée à une extrémité du stator, le rotor étant monté à rotation uniquement sur le stator.This device is a little simpler than the previous one, because it does not have a tension roller, but its housing is heavy and bulky and not very handy, in addition its sole prevents use for treating non-planar surfaces. It has the same defect as the previous one with regard to security. The object of the invention is to provide an apparatus which is at the same time lighter, more manageable and simpler than the known apparatuses, while allowing the treatment of surfaces of various shapes, including concaves, and capable of providing improved security. . The invention therefore provides a device for sanding, grating, polishing and buffing materials, comprising an electric motor comprising a central assembly and a peripheral assembly, which can rotate relative to each other about a common axis , the device being provided with a handle adapted to be grasped with one hand, this handle being fixedly connected to the central assembly, known as the "stator" of the engine, and the external surface of the peripheral assembly known as "rotor" of the motor, carrying an abrasive material, this device comprising a rigid arm directly and fixedly connecting one end of the handle to one end of the stator, the rotor being rotatably mounted only on the stator.
Il est clair que la matière abrasive est adaptée au travail prévu, par exemple les poils d'une brosse sont en une matière abrasive adaptée à un polissage ou lustrage.It is clear that the abrasive material is suitable for the intended work, for example the bristles of a brush are made of an abrasive material suitable for polishing or buffing.
L'idée de base de la présente invention réside donc dans la suppression du boîtier, qui, dans les dispositions de l'art antérieur, servait à supporter au moins le stator, de façon fixe, par l'intermédiaire de roulements, la poignée et l'arrivée du câble d'alimentation. Le boîtier est remplacé par un simple bras rigide. L'allégement et la simplification sont évidents.The basic idea of the present invention therefore lies in the elimination of the housing, which, in the provisions of the prior art, served to support at least the stator, in a fixed manner, by means of bearings, the handle and the arrival of the power cable. The housing is replaced by a simple rigid arm. The simplification and simplification are obvious.
Une amélioration peut également être faite en ce qui concerne la sécurité. Dans le cas où le moteur est alimenté en énergie électrique par l'intermédiaire d'un câble, on prévoit avantageusement que ledit câble traverse la poignée et atteint le moteur en étant fixé le long du bras.Security can also be improved. In the case where the motor is supplied with electrical energy via a cable, provision is advantageously made for said cable to pass through the handle and reach the motor by being fixed along the arm.
Dans le cas où le moteur est alimenté par une source autonome, on prévoit avantageusement que celle-ci est logée dans la poignée, et reliée au moteur par un câble fixé le long du bras.In the case where the motor is powered by an independent source, it is advantageously provided that the latter is housed in the handle, and connected to the motor by a cable fixed along the arm.
Dans les deux cas, on peut prévoir un interrupteur et/ou un variateur dans la poignée. On peut prévoir que le bras est unique ce qui procure 1'avantage de permettre de travailler dans les angles rentrants de la surface à traiter.In both cases, a switch and / or a dimmer can be provided in the handle. Provision may be made for the arm to be unique, which gives the advantage of allowing work to be carried out on the inside corners of the surface to be treated.
Suivant un autre mode de réalisation intéressant, qui procure une grande rigidité, le bras est en forme de Y dont chacune des branches est fixée à une extrémité de l'axe du stator et le centre est fixé sur la poignée.According to another interesting embodiment, which provides great rigidity, the arm is Y-shaped, each of the branches of which is fixed to one end of the axis of the stator and the center is fixed to the handle.
Avantageusement, dans ce cas, 1'une des branches du bras en Y est articulée et s'ouvre de façon à permettre le montage de la matière abrasive. Pour une meilleure sécurité, on peut prévoir, à l'endroit où la branche s'ouvre, une connexion électrique qui interrompt l'alimentation du moteur lorsque la branche est ouverte.Advantageously, in this case, one of the arms of the Y-shaped arm is articulated and opens so as to allow the mounting of the abrasive material. For better security, an electrical connection can be provided at the point where the branch opens which interrupts the motor supply when the branch is open.
Pour faciliter la tenue de l'appareil par un opérateur, on peut prévoir qu'une ou deux poignées auxiliaires, articulées ou non, sont fixées au bras ou au moins à une branche de celui-ci pour en permettre un meilleur contrôle.To facilitate the holding of the device by an operator, it can be provided that one or two auxiliary handles, articulated or not, are fixed to the arm or at least to a branch thereof to allow better control.
Selon une réalisation de l'invention, un cylindre de matériau abrasif est préformé séparément et vient s'enfiler sur le "rotor", dont il peut être rendu solidaire par des rainures pratiquées le long de la surface interne du cylindre abrasif et de la surface externe du "rotor" ou par des pistons fixés sur une base du cylindre du "rotor" et venant s'encastrer dans des logements pratiqués dans une base du cylindre abrasif.According to one embodiment of the invention, a cylinder of abrasive material is preformed separately and is threaded onto the "rotor", of which it can be made integral by grooves formed along the internal surface of the abrasive cylinder and the surface external of the "rotor" or by pistons fixed on a base of the cylinder of the "rotor" and coming to be embedded in housings made in a base of the abrasive cylinder.
Selon une autre réalisation, le matériau abrasif est constitué d'une feuille souple qui est enroulée sur deux demi-cylindres, l'un solidaire du "rotor" et l'autre articulé sur le précédent par une charnière. Les deux extrémités de la feuille abrasive souple sont fixées dans une pince en forme de rainure incorporée dans un rouleau, qui est lui-même intégré dans le cylindre du "rotor" au droit du bout sans charnière du demi-cylindre fixe. Une clé escamotable placée en bout de ce rouleau permet de le faire tourner sur son axe, ce qui provoque l'enroulement autour de lui de la feuille abrasive, dont la tension progressive autour des deux demi-cylindres provoque leur fermeture complète sur le "rotor". Un cliquet en fin de course les maintient en place. Pour améliorer la tension de la feuille abrasive, on peut recouvrir la surface extérieure des deux demi-cylindres d'une matière souple, comme, par exemple, de la peau de mouton lainée ou de la mousse de polyuréthane.According to another embodiment, the abrasive material consists of a flexible sheet which is wound on two half-cylinders, one secured to the "rotor" and the other articulated on the previous one by a hinge. The two ends of the flexible abrasive sheet are fixed in a groove-shaped clamp incorporated in a roller, which is itself integrated in the cylinder of the "rotor" to the right of the end without hinge of the fixed half-cylinder. A retractable key placed at the end of this roller allows it to rotate on its axis, which causes the abrasive sheet to be wound around it, the progressive tension of which around the two half-cylinders causes their complete closure on the "rotor ". A ratchet at the end of the race keeps them in place. To improve the tension of the abrasive sheet, the outer surface of the two half-cylinders can be covered with a flexible material, such as, for example, woolen sheepskin or polyurethane foam.
Selon une variante de cette réalisation, les deux demi-cylindres peuvent être remplacés par deux fractions de cylindre de dimensions inégales, la plus petite étant articulée sur la plus grande et les deux ensembles formant un cylindre complet, le reste du dispositif et son fonctionnement sont identiques à ceux du précédent.According to a variant of this embodiment, the two half-cylinders can be replaced by two fractions of cylinders of unequal dimensions, the smallest being articulated on the largest and the two assemblies forming a complete cylinder, the rest of the device and its operation are identical to those of the previous one.
Selon une variante des deux précédentes réalisations, le rouleau permettant de tendre la feuille de matériau abrasif est remplacé par un axe fendu dans sa longueur dans lequel on enfile les deux extrémités de la feuille abrasive. On fait tourner cet axe autour de lui- même à 1'aide du même type de clé fixée à 1'une de ses extrémités. Selon une autre réalisation, le matériau abrasif est constitué d'une feuille souple autocollante qui s'enroule sur le cylindre du "rotor" en y adhérant.According to a variant of the two previous embodiments, the roller for tensioning the sheet of abrasive material is replaced by a split axis in its length in which the two ends of the abrasive sheet are threaded. This axis is rotated around itself using the same type of key attached to one of its ends. According to another embodiment, the abrasive material consists of a flexible self-adhesive sheet which is wound on the cylinder of the "rotor" while adhering to it.
Dans tous les modes de réalisation, l'opérateur tient l'appareil par la poignée et le met en marche en ouvrant l'interrupteur ou le variateur, ce qui met le moteur en marche. L'axe du moteur étant maintenu fixe par la poignée, c'est le "rotor" qui se met en rotation et entraine la rotation du cylindre airasif. Il ne reste plus à l'opérateur qu'à appuyer ce cylindre abrasif sur la surface à travailler pour obtenir l'effet recherché.In all the embodiments, the operator holds the device by the handle and starts it by opening the switch or the variator, which starts the engine. The axis of the engine being held fixed by the handle, it is the "rotor" which starts to rotate and causes the rotation of the air cylinder. It only remains for the operator to press this abrasive cylinder on the work surface to obtain the desired effect.
Les dessins annexés illustrent, à titre d'exemple, deux modes de réalisation du dispositif conforme à la présente invention.The accompanying drawings illustrate, by way of example, two embodiments of the device according to the present invention.
Figure 1 représente, en perspective, le moteur et le rouleau abrasif avant sa mise en place.Figure 1 shows, in perspective, the motor and the abrasive roller before its installation.
Figure 2 représente l'ensemble eu dispositif, en vue de côté.Figure 2 shows the whole device, in side view.
Figure 3 représente l'ensemble du dispositif de la figure 2, vu suivant une direction perpendiculaire, avec le rouleau abrasif séparé.Figure 3 shows the entire device of Figure 2, seen in a perpendicular direction, with the separate abrasive roller.
Figure 4 représente le même ensemble, en perspective.Figure 4 shows the same set, in perspective.
Figure 5 et 6 représentent, respectivement en perspective et vu en bout, une variante du moteur et du rouleau abrasif.Figure 5 and 6 show, respectively in perspective and seen at the end, a variant of the motor and the abrasive roller.
Le dispositif des figures 1 à 4 comporte un moteur électrique de forme cylindrique, d'un type connu, formé essentiellement d'un équipage central ou "stator" 1 et d'un équipage périphérique ou "rotor" 2. Un cylindre de matériau abrasif 3, par exemple en métal enduit de matière abrasive d'un type connu, vient s'enfiler autour du "rotor" 2 du moteur, dont il est rendu solidaire par des nervures et rainures 4A, 4B le long de la surface interne du cylindre abrasif 3 et de la surface externe du "rotor" 2. Une poignée 5 se prolonge par un bras 6 fixé à l'axe du stator 1, dont il est solidaire. La figure 3 montre que le bras 6 comporte deux branches 6A, 6B dont l'une, 6B, s'ouvre au moyen d'un charnière 7, de façon à permettre le montage du cylindre abrasif 3 et, au besoin, l'effacement complet de cette branche pour permettre d'aller dans les coins. Le moteur est alimenté en courant électrique par un conducteur 8 d'un type connu passant par la poignée 5, et dans la branche 6A, qui est creuse. L'allumage et la vitesse de rotation sont déterminés par un interrupteur/variateur 9, de type connu, fixé sur la poignée 5. Dans une variante, non représentée, le câble d'alimentation 8, ou l'un de ses conducteurs, passe le long de la branche articulée 6B, et se termine dans une connexion qui s'ouvre lorsqu'on écarte la branche 6B du stator 1, ce qui permet de changer le cylindre abrasif sans aucun risque de remise en route intempestive du moteur.The device of FIGS. 1 to 4 comprises an electric motor of cylindrical shape, of a known type, formed essentially a central assembly or "stator" 1 and a peripheral assembly or "rotor" 2. A cylinder of abrasive material 3, for example of metal coated with abrasive material of a known type, is threaded around the "rotor" 2 of the motor, of which it is made integral by ribs and grooves 4A, 4B along the internal surface of the abrasive cylinder 3 and the external surface of the "rotor" 2. A handle 5 is extended by an arm 6 fixed to the axis of stator 1, of which it is integral. Figure 3 shows that the arm 6 has two branches 6A, 6B, one of which, 6B, opens by means of a hinge 7, so as to allow the mounting of the abrasive cylinder 3 and, if necessary, the erasure complete of this branch to allow to go in the corners. The motor is supplied with electric current by a conductor 8 of a known type passing through the handle 5, and in the branch 6A, which is hollow. The ignition and the speed of rotation are determined by a switch / variator 9, of known type, fixed on the handle 5. In a variant, not shown, the power cable 8, or one of its conductors, passes along the articulated branch 6B, and ends in a connection which opens when the branch 6B is removed from the stator 1, which makes it possible to change the abrasive cylinder without any risk of inadvertent restarting of the engine.
L'utilisateur tient l'appareil par la poignée 5 et le met en marche au moyen de 1'interrupteur/variateur 9. Solidaires de la poignée 5, le bras 6 et le "stator" 1 restent fixes, tandis que le "rotor" 2 tourne autour du stator, entraînant le cylindre abrasif 3 dans le même mouvement. En appuyant ce cylindre 3 sur le matériau que l'on veut poncer, on obtient l'effet désiré.The user holds the device by the handle 5 and turns it on by means of the switch / variator 9. Solid with the handle 5, the arm 6 and the "stator" 1 remain fixed, while the "rotor" 2 rotates around the stator, driving the abrasive cylinder 3 in the same movement. By pressing this cylinder 3 on the material that you want to sand, you get the desired effect.
Dans des variantes de cette réalisation, le bras 6 peut porter une ou plusieurs poignées complémentaires, articulées ou non, 10 et 11 (figure 3), qui permettent un meilleur appui; il peut aussi n'avoir qu'une branche 6A, la branche articulée 6B étant supprimée.In variants of this embodiment, the arm 6 can carry one or more complementary handles, articulated or not, 10 and 11 (FIG. 3), which allow a better support; it can also have only one branch 6A, the articulated branch 6B being eliminated.
En outre, une articulation biocable 12, visible à la figure 2, permet de faire varier l'orientation de la poignée 5 par rapport au bras 6, pour un meilleur confort d'utilisation.In addition, a biocable articulation 12, visible in FIG. 2, makes it possible to vary the orientation of the handle 5 relative to the arm 6, for better comfort of use.
On a représenté à la figure 3, un protecteur 13 qui a la forme d'une coupole sphérique, fixé sur la partie avant de la poignée 5 et qui sert à éviter le risque de projection de débris vers la main de l'opérateur ou même un contact accidentel de cette main avec le cylindre abrasif. L'existence d'un tel risque résulte de la suppression du carter prévu dans les dispositifs de l'art antérieur. On observera de plus qu'à la même figure 3, le cylindre abrasif a une structure particulière. Il comprend, en effet, une partie lisse 3A qui s'étend sur la plus grande partie de sa longueur, et une partie abrasive 3B, de faible longueur et de plus grand diamètre, qui sert à poncer le fond d'une rainure. Il est clair que les diamètres et longueurs des parties abrasives et non abrasives, ainsi que leur nombre et leur disposition, peuvent varier à volonté en fonction des besoins de 1'utilisateur. Les figures 4 et 5 représentent un deuxième mode de réalisation; il ne diffère du précédent avec ses variantes que par le mode de fixation du cylindre abrasif. Ce cylindre est composé d'une feuille souple 16 de matériau abrasif d'un type connu qui vient s'envelopper autour de deux demi-cylindres, l'un 17 fixé au "rotor" 2, l'autre 18 fixé au 17 par une charnière 19. Au bout sans charnière du demi-cylindre 17 incorporé dans le "rotor" 2, un rouleau 21, fendu dans sa longueur selon une rainure 20, reçoit les deux extrémités de la feuille 16. En faisant tourner le rouleau 21 autour de son axe, dans le sens illustré par la flèche 25, au moyen d'une clé escamotable 22, on enroule la feuille 16 jusqu'à ce que les deux demi- cylindres 17 et 18 viennent se rejoindre de façon à former un cylindre unique qu'un cliquet 23 maintient fermé. Le dispositif est alors prêt à fonctionner comme celui des figures 1 à 3 et peut faire l'objet des mêmes variantes. Un perfectionnement de ce dispositif consiste à recouvrir la surface extérieure des demi-cylindres 17 et 18 avec un matériau souple 24, par exemple de la peau de mouton laînée ou de la mousse de polyuréthane, de façon à obtenir une bonne tension de la feuille abrasive 16 et une bonne qualité de surface à la fermeture entre les deux demi-cylindres.There is shown in Figure 3, a protector 13 which has the shape of a spherical dome, fixed on the front part of the handle 5 and which serves to avoid the risk of projection of debris towards the hand of the operator or even accidental contact of this hand with the abrasive cylinder. The existence of such a risk results from the removal of the casing provided for in the devices of the prior art. It will also be observed that in the same FIG. 3, the abrasive cylinder has a particular structure. It comprises, in fact, a smooth part 3A which extends over most of its length, and an abrasive part 3B, of short length and of larger diameter, which is used to sand the bottom of a groove. It is clear that the diameters and lengths of the abrasive and non-abrasive parts, as well as their number and their arrangement, can vary at will according to the needs of the user. Figures 4 and 5 show a second embodiment; it differs from the previous one with its variants only in the method of fixing the abrasive cylinder. This cylinder is composed of a flexible sheet 16 of abrasive material of a known type which is wrapped around two half-cylinders, one 17 fixed to the "rotor" 2, the other 18 fixed to 17 by a hinge 19. At the hinged end of the half-cylinder 17 incorporated in the "rotor" 2, a roller 21, split lengthwise along a groove 20, receives the two ends of the sheet 16. By rotating the roller 21 around its axis, in the direction illustrated by the arrow 25, by means of a retractable key 22, the sheet 16 is wound up until the two half cylinders 17 and 18 come together so as to form a single cylinder which a pawl 23 keeps closed. The device is then ready to operate like that of FIGS. 1 to 3 and can be the subject of the same variants. An improvement of this device consists in covering the external surface of the half-cylinders 17 and 18 with a flexible material 24, for example woolen sheepskin or polyurethane foam, so as to obtain a good tension of the abrasive sheet. 16 and a good surface quality at closure between the two half-cylinders.
La figure 5 représente, en perspective, l'articulation des demi-cylindres entourés de la feuille abrasive, sans les rotor, axe, bras et poignée. La figure 6 représente en bout l'ensemble du dispositif sans le bras et la poignée, lesquels sont identiques à ceux des figures 2 à 4 et peuvent faire l'objet des mêmes variantes.FIG. 5 represents, in perspective, the articulation of the half-cylinders surrounded by the abrasive sheet, without the rotor, axis, arm and handle. Figure 6 shows the end of the entire device without the arm and the handle, which are identical to those of Figures 2 to 4 and may be subject to the same variants.
Si on désire utiliser l'appareil à des travaux de polissage ou lustrage, le cylindre abrasif 3, ou la feuille souple 16, peuvent porter des poils de brosse de dureté appropriée, constituant un abrasif doux. If it is desired to use the apparatus for polishing or buffing, the abrasive cylinder 3, or the flexible sheet 16, may carry brush bristles of appropriate hardness, constituting a soft abrasive.

Claims

REVENDICATIONS
1. Dispositif permettant de poncer, râper, polir et lustrer des matériaux, comportant un moteur électrique comprenant un équipage central ( 1 ) et un équipage périphérique (2), pouvant tourner 1'un par rapport à l'autre autour d'un axe commun, le dispositif étant pourvu d'une poignée (5) adaptée à être saisie avec une main, cette poignée étant reliée de façon fixe à 1'équipage central, dit "stator" du moteur, et la surface externe de l'équipage périphérique dit "rotor" du moteur, portant une matière abrasive, caractérisé en ce qu'il comprend un bras rigide (6) reliant directement et de façon fixe une extrémité de la poignée (5) à une extrémité du stator (1), et en ce que le rotor (2) est monté à rotation uniquement sur le stator.1. Device for sanding, grating, polishing and buffing materials, comprising an electric motor comprising a central assembly (1) and a peripheral assembly (2), which can rotate relative to one another about an axis common, the device being provided with a handle (5) adapted to be grasped with one hand, this handle being fixedly connected to the central equipment, called the "stator" of the engine, and the external surface of the peripheral equipment said "rotor" of the motor, carrying an abrasive material, characterized in that it comprises a rigid arm (6) directly and fixedly connecting one end of the handle (5) to one end of the stator (1), and in that the rotor (2) is rotatably mounted only on the stator.
2. Dispositif selon la revendication 1, et dans lequel le moteur est alimenté par un câble d'alimentation électrique, caractérisé en ce que ledit câble traverse la poignée et atteint le moteur en étant fixé le long du bras.2. Device according to claim 1, and wherein the motor is powered by an electric power cable, characterized in that said cable passes through the handle and reaches the motor by being fixed along the arm.
3. Dispositif selon la revendication 1, et dans lequel le moteur est alimenté par une source autonome, caractérisé en ce que celle-ci est logée dans la poignée, et reliée au moteur par un câble fixé le long du bras.3. Device according to claim 1, and wherein the motor is powered by an autonomous source, characterized in that the latter is housed in the handle, and connected to the motor by a cable fixed along the arm.
4. Dispositif selon la revendication précédente, caractérisé en ce que le bras est en forme de Y dont chacune des branches (6A, 6B) est fixée à une extrémité de l'axe du stator et le centre est fixé sur la poignée. 4. Device according to the preceding claim, characterized in that the arm is Y-shaped, each of the branches (6A, 6B) is fixed to one end of the stator axis and the center is fixed on the handle.
5. Dispositif selon la revendication précédente, caractérisé en ce que l'une des branches (6B) du bras en Y est articulée et s'ouvre de façon à permettre le montage de la matière abrasive.5. Device according to the preceding claim, characterized in that one of the branches (6B) of the Y-shaped arm is articulated and opens so as to allow the mounting of the abrasive material.
6. Dispositif selon la revendication 5 et selon l'une des revendications 2 ou 3, caractérisé en ce qu'il est prévu, à l'endroit où la branche s'ouvre, une connexion électrique qui interrompt l'alimentation du moteur lorsque la branche est ouverte.6. Device according to claim 5 and according to one of claims 2 or 3, characterized in that there is provided, at the place where the branch opens, a electrical connection which interrupts the power supply to the motor when the branch is open.
7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une ou deux poignées auxiliaires (10, 11), articulées ou non, sont fixées au bras ou au moins à une branche de celui-ci pour en permettre un meilleur contrôle.7. Device according to any one of the preceding claims, characterized in that one or two auxiliary handles (10, 11), articulated or not, are fixed to the arm or at least to a branch thereof to allow a better control.
8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le bras rigide (6) comporte une articulation blocable (12) permettant de fixer à volonté 1 ' orientation de la poignée ( 5 ) par rapport au moteur ( 1 , 2 ) .8. Device according to any one of the preceding claims, characterized in that the rigid arm (6) comprises a lockable articulation (12) allowing the orientation of the handle (5) to be fixed at will relative to the motor (1, 2).
9. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend un protecteur (13) solidaire de la poignée (5) et destiné à protéger la main de l'utilisateur.9. Device according to any one of the preceding claims, characterized in that it comprises a protector (13) integral with the handle (5) and intended to protect the hand of the user.
10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que, sur le rotor (2) est enfilé un cylindre abrasif (3) amovible entraîné en rotation par le rotor.10. Device according to any one of the preceding claims, characterized in that, on the rotor (2) is threaded a removable abrasive cylinder (3) driven in rotation by the rotor.
11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le rotor ( 2 ) , ou le cylindre amovible ( 3 ) comporte des parties non- abrasives. (3A) et des parties abrasives (3B)) en forme de cylindres, dont la longueur, le diamètre, le nombre et la disposition sont choisis en fonction de l'utilisation prévue . 11. Device according to any one of the preceding claims, characterized in that the rotor (2), or the removable cylinder (3) comprises non-abrasive parts. (3A) and abrasive parts (3B)) in the form of cylinders, the length, diameter, number and arrangement of which are chosen according to the intended use.
EP92902141A 1990-12-17 1991-12-17 Portable electric sander Expired - Lifetime EP0563215B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9015761A FR2670421B1 (en) 1990-12-17 1990-12-17 PORTABLE ELECTRIC SANDER.
FR9015761 1990-12-17
PCT/FR1991/001021 WO1992011115A1 (en) 1990-12-17 1991-12-17 Portable electric sander

Publications (2)

Publication Number Publication Date
EP0563215A1 true EP0563215A1 (en) 1993-10-06
EP0563215B1 EP0563215B1 (en) 1995-03-22

Family

ID=9403305

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92902141A Expired - Lifetime EP0563215B1 (en) 1990-12-17 1991-12-17 Portable electric sander

Country Status (5)

Country Link
EP (1) EP0563215B1 (en)
AU (1) AU9142891A (en)
DE (1) DE69108412T2 (en)
FR (1) FR2670421B1 (en)
WO (1) WO1992011115A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2691392B1 (en) * 1992-05-21 1995-11-03 Meffre Olivier DEVICE FOR SANDING, SHINING, POLISHING AND POLISHING MATERIALS.
IT1293358B1 (en) * 1997-05-12 1999-02-25 Ezio Trevisiol ELECTROMANUAL SANDING PLANER
GB0014806D0 (en) * 2000-06-19 2000-08-09 Black & Decker Inc A power tool
DE102006060764A1 (en) * 2006-12-21 2008-06-26 Brinkmann Gmbh & Co. Kg Machine tool for cutting has stator which is surrounded by cup-shaped rotor, on which cutting tool is mounted

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1980056A (en) * 1933-02-08 1934-11-06 Hans U Hedeby Power actuated hand plane
FR57557E (en) * 1947-08-19 1953-02-05 Abrasive belt wheel
US2580140A (en) * 1949-08-08 1951-12-25 William H Van Zomeren Drum type abrading device
FR1055527A (en) * 1952-05-07 1954-02-19 Avodec Sanding machine
US3049841A (en) * 1959-07-13 1962-08-21 Amos E Jackson Portable sanders
FR2622136B1 (en) * 1987-10-27 1990-05-18 Herremans Frank DEVICE FOR SANDING PLANAR OR CURVED SURFACES
EP0395393A1 (en) * 1989-04-26 1990-10-31 James Tasikas Abrading drum

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9211115A1 *

Also Published As

Publication number Publication date
EP0563215B1 (en) 1995-03-22
AU9142891A (en) 1992-07-22
WO1992011115A1 (en) 1992-07-09
FR2670421B1 (en) 1995-03-31
DE69108412T2 (en) 1995-12-14
FR2670421A1 (en) 1992-06-19
DE69108412D1 (en) 1995-04-27

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