EP0725707B1 - Exceptionally flat hand tool for polishing or deburring - Google Patents

Exceptionally flat hand tool for polishing or deburring Download PDF

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Publication number
EP0725707B1
EP0725707B1 EP93910130A EP93910130A EP0725707B1 EP 0725707 B1 EP0725707 B1 EP 0725707B1 EP 93910130 A EP93910130 A EP 93910130A EP 93910130 A EP93910130 A EP 93910130A EP 0725707 B1 EP0725707 B1 EP 0725707B1
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EP
European Patent Office
Prior art keywords
tool
main body
tool according
mating surface
edge
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EP93910130A
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German (de)
French (fr)
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EP0725707A1 (en
Inventor
Alcéo MAURO
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TECHNIMETAL
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TECHNIMETAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/02—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface
    • B24D15/023—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface using in exchangeable arrangement a layer of flexible material

Definitions

  • the present invention relates to hand tools capable of to form a gripping member and to receive and support a sheet of abrasive material, the assembly forming a hand tool that can be used to polish or deburr a part.
  • the hand tools currently used to form a gripping and carrying a sheet of abrasive material include a rigid main body generally having a contact surface flat, and include hooking devices for maintaining a abrasive strip pressed against the contact surface.
  • the body is relatively thick and bulky, to form a handle that the user can grip hand without his fingers protruding below the abrasive contact surface.
  • the surface of contact is flat, so that it can be pressed entirely against the surface to be polished.
  • the body is formed by two offset beams from each other in the direction of the depth of the body. Both beams meet at one end, and are connected at the other end with an upright.
  • the beam forming the contact surface is flexible, and integral with the base of the upright.
  • the second sliding beam in the top of the upright and adjusts the curvature of the first beam.
  • the problem proposed by the present invention is to design a new easy to use tool for polishing or deburring of use and inexpensive, and which allows, without any modification, to fulfill several essential functions, namely polishing or deburring in cracks and gaps, polishing the area peripheral of any surface, and also the polishing of a central part of flat surface.
  • the tool must allow these different uses by ensuring a good grip in hand, while having a particularly small footprint allowing its introduction into a pocket of clothing.
  • the solution according to the invention consists in using a body main rigid, having a contact surface over its entire length between its two longitudinal ends, and comprising attachment means for holding an abrasive strip pressed against the contact surface.
  • the contact surface is convex and curved in the sense of its length.
  • the main body has a low thickness, its upper surface remaining at any point below or only slightly above the plane joining the two ends longitudinal of the contact surface.
  • the length and curvature of the main body are chosen so that sufficient space is provided for the passage of a user's fingers in the vicinity of a first end of the tool between the contact surface of the tool and the flat surface to be polished, when the contact surface is supported on said planar surface to be polished in the vicinity of its second end.
  • the user can thus have the tool well in hand at one of its ends, and polish the surface with the other end of the tool.
  • the flat, thin body shape allows tool to be inserted in cracks or gaps to polish the interior.
  • Such a tool can also be used a bit like a file, held with a or two hands, to polish or deburr the edge or edge of a surface or a room.
  • the tool is advantageously provided with two hooking devices ultra-flat, arranged on the upper surface of the tool body opposite to the contact surface, ensuring good attachment and good tension of the abrasive belt, without increasing the size of all.
  • the main body includes a lower part in the general shape of the following strip the curvature of the contact surface, and an upper part forming a central stiffening rib secured to the lower part and whose upper edge is only slightly above the plane joining the two longitudinal ends of the contact surface.
  • an upper surface part of the body of tool located between the hooking device and the corresponding end is covered with a layer of elastically deformable material, and is slightly inclined above the plane joining the two longitudinal ends of the contact surface.
  • a comparison with the main known hand tools allowing the sanding function by removable abrasive belt shows that the tool according to the present invention has a clear superiority over known tools, for several important functions: it turns out that the tool of the invention is much more manageable, has a weight and a smaller footprint for the same useful surface, allows a significantly improved sanding accuracy due to the special shape of the tool, and allows to use all the useful surface of the strip abrasive. In addition, it allows sanding work on the interior curved surfaces, it allows accessibility of surfaces to sand inside cracks or small cavities. These improvements demonstrate the technical progress achieved by the invention.
  • the hand tool according to the present invention comprises a rigid main body 1, formed a strip of rigid material of small thickness and elongated, curved lengthwise to present a contact surface 2 convex.
  • the tool On its upper surface 3 opposite the contact surface 2, the tool comprises two opposite hooking devices 4 and 5, arranged respectively in the vicinity of each of the longitudinal ends 21 and 22 of the main body 1.
  • Each of the hooking devices 4 and 5 is shaped to retain one of the longitudinal ends of a abrasive strip 6 pressed against the contact surface 2 and passed over the two respective ends 21 and 22 of the main body 1.
  • the rigid main body 1 is coated with a layer of material elastically deformable 9, forming the convex contact surface 2.
  • the devices hooking 4 and 5 are arranged slightly away from the ends 21 and 22 of the main body, leaving a length L of upper surface 3 of body which can be covered by a portion of abrasive band 6.
  • the portion of abrasive belt 6 located between the end 21 and the corresponding attachment device 4 can also be used to polish or deburr a part, for example in a gap or slot.
  • the two sides of the tool are thus usable in the end zone.
  • the main body 1 is optionally provided, in each of the end zones 7 and 8, a layer of material elastically deformable such as layer 10, but without this is essential.
  • each of the devices attachment such that the device 4 comprises a lever 11 articulated along a transverse axis 12 and developing parallel to the body main 1.
  • the lever 11 comprises a pinch arm 13 oriented towards the corresponding end 21 of the main body 1 and comprising a transverse rim 14 curved towards the main body 1.
  • the lever 11 comprises, in contrast, an actuating arm 15 slightly spaced from the upper surface of main body 1 to allow actuation and the pivoting of the lever 11 by pressing on the actuating arm 15.
  • a transverse groove 16 is formed on the surface upper part of main body 1, limited by a sharp edge 17 on the side of the corresponding end 21 of the body and by a draft 18 of the other side, as shown in more detail in Figure 4.
  • the lever 11 is arranged so that the transverse edge 14 comes engage in the transverse groove 16.
  • lever 11 is advantageously housed opposite a recess 19 formed on the surface upper part of tool body 1.
  • the elastic means is a leaf spring housed in the recess 19 of the upper face 3 of the main body 1, and resting on the main body and on the arm actuation 15 of lever 11.
  • the lever 11 comprises advantageously an actuating arm 15 slightly angularly raised relative to the pinch arm 13, to increase the angle of permissible pivoting of lever 11 without, however, increasing excessively the size of the lever 11 above the upper body surface of tool 1.
  • the tool body 1 is entirely located on the same side of the plane S passing through the two longitudinal ends 21 and 22.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

La présente invention concerne les outils à main susceptibles de former organe de préhension et de recevoir et supporter une feuille de matériau abrasif, l'ensemble formant un outil à main pouvant être utilise pour polir ou ébavurer une pièce.The present invention relates to hand tools capable of to form a gripping member and to receive and support a sheet of abrasive material, the assembly forming a hand tool that can be used to polish or deburr a part.

Les outils à main actuellement utilisés pour former organe de préhension et porter une feuille de matériau abrasif comprennent un corps principal rigide présentant une surface de contact généralement plane, et comportent des dispositifs d'accrochage pour le maintien d'une bande abrasive plaquée sur la surface de contact. Dans les outils connus les plus couramment utilisés, le corps est relativement épais et volumineux, pour former une poignée que l'utilisateur peut agripper à la main sans que ses doigts débordent sous la surface abrasive de contact. On cherche en effet à avoir une bonne prise de l'outil, permettant son actionnement pour le déplacer sur une surface à polir. La surface de contact est plane, de façon qu'elle puisse se plaquer entièrement contre la surface à polir.The hand tools currently used to form a gripping and carrying a sheet of abrasive material include a rigid main body generally having a contact surface flat, and include hooking devices for maintaining a abrasive strip pressed against the contact surface. In known tools most commonly used, the body is relatively thick and bulky, to form a handle that the user can grip hand without his fingers protruding below the abrasive contact surface. We are looking to have a good grip on the tool, allowing its actuation to move it on a surface to be polished. The surface of contact is flat, so that it can be pressed entirely against the surface to be polished.

Parmi les outils à corps épais et volumineux, on connait un outil à surface de contact à incurvation réglable tel que décrit dans le document GB-A-2 114 028. Le corps est formé de deux poutres décalées l'une de l'autre dans le sens de la profondeur du corps. Les deux poutres se rejoignent à une extrémité, et sont reliées à l'autre extrémité par un montant. La poutre formant la surface de contact est flexible, et solidaire de la base du montant. La seconde poutre coulisse dans le sommet du montant et permet de régler l'incurvation de la première poutre.Among the tools with thick and bulky bodies, there is a known tool with adjustable curved contact surface as described in document GB-A-2 114 028. The body is formed by two offset beams from each other in the direction of the depth of the body. Both beams meet at one end, and are connected at the other end with an upright. The beam forming the contact surface is flexible, and integral with the base of the upright. The second sliding beam in the top of the upright and adjusts the curvature of the first beam.

Toutefois, ces outils présentent l'inconvénient d'être encombrants, et ils ne conviennent pas pour polir l'intérieur d'interstices ou de fentes. Leur encombrement ne permet pas de les incorporer aisément dans une poche de vêtement.However, these tools have the disadvantage of being bulky, and they are not suitable for polishing the interior of gaps or slots. Their size does not allow them to be easily incorporated in a garment pocket.

On connaít également un outil rectiligne plat tel que décrit dans le document US-A-2 428 618. Les extrémités de la bande abrasive sont pincées par des lames ressort débordant au-dessus des bords de la face supérieure du corps d'outil, interdisant la pénétration de l'outil dans une fente étroite. We also know a flat rectilinear tool as described in document US-A-2 428 618. The ends of the abrasive belt are pinched by spring blades protruding above the edges of the upper face of the tool body, preventing tool penetration in a narrow slot.

RESUME DE L'INVENTIONSUMMARY OF THE INVENTION

Le problème proposé par la présente invention est de concevoir un nouvel outil à main pour polir ou ébavurer, qui soit facile d'utilisation et peu onéreux, et qui permette, sans aucune modification, de remplir plusieurs fonctions essentielles, à savoir le polissage ou ébavurage dans les fentes et interstices, le polissage de la zone périphérique d'une surface quelconque, et également le polissage d'une partie centrale de surface plane. Par sa structure particulière, l'outil doit permettre ces différentes utilisations en assurant une bonne prise en main, tout en présentant un encombrement particulièrement réduit permettant son introduction dans une poche de vêtement.The problem proposed by the present invention is to design a new easy to use tool for polishing or deburring of use and inexpensive, and which allows, without any modification, to fulfill several essential functions, namely polishing or deburring in cracks and gaps, polishing the area peripheral of any surface, and also the polishing of a central part of flat surface. By its particular structure, the tool must allow these different uses by ensuring a good grip in hand, while having a particularly small footprint allowing its introduction into a pocket of clothing.

Ce problème est résolu par un outil avec les caractéristiques de la revendication 1.This problem is solved by a tool with the characteristics of claim 1.

La solution selon l'invention consiste à utiliser un corps principal rigide, présentant une surface de contact sur toute sa longueur entre ses deux extrémités longitudinales, et comportant des moyens d'accrochage pour le maintien d'une bande abrasive plaquée sur la surface de contact. La surface de contact est convexe et incurvée dans le sens de sa longueur. Le corps principal présente une faible épaisseur, sa surface supérieure restant en tout point au-dessous ou seulement légèrement au-dessus du plan joignant les deux extrémités longitudinales de la surface de contact.The solution according to the invention consists in using a body main rigid, having a contact surface over its entire length between its two longitudinal ends, and comprising attachment means for holding an abrasive strip pressed against the contact surface. The contact surface is convex and curved in the sense of its length. The main body has a low thickness, its upper surface remaining at any point below or only slightly above the plane joining the two ends longitudinal of the contact surface.

De préférence, la longueur et l'incurvation du corps principal sont choisies de façon qu'un espace suffisant soit réalisé pour le passage de doigts de main d'un utilisateur au voisinage d'une première extrémité de l'outil entre la surface de contact de l'outil et la surface plane à polir, lorsque la surface de contact est en appui sur ladite surface plane à polir au voisinage de sa seconde extrémité. L'utilisateur peut ainsi avoir l'outil bien en main à l'une de ses extrémités, et polir la surface par l'autre extrémité de l'outil. La forme plate de faible épaisseur du corps permet d'introduire l'outil dans des fentes ou interstices pour en polir l'intérieur. Un tel outil peut également être utilisé un peu à la façon d'une lime, tenu avec une ou deux mains, pour polir ou ébavurer le bord ou l'arête d'une surface ou d'une pièce.Preferably the length and curvature of the main body are chosen so that sufficient space is provided for the passage of a user's fingers in the vicinity of a first end of the tool between the contact surface of the tool and the flat surface to be polished, when the contact surface is supported on said planar surface to be polished in the vicinity of its second end. The user can thus have the tool well in hand at one of its ends, and polish the surface with the other end of the tool. The flat, thin body shape allows tool to be inserted in cracks or gaps to polish the interior. Such a tool can also be used a bit like a file, held with a or two hands, to polish or deburr the edge or edge of a surface or a room.

L'outil est avantageusement pourvu de deux dispositifs d'accrochage ultra-plats, disposés sur la surface supérieure du corps d'outil à l'opposé de la surface de contact, assurant un bon accrochage et une bonne tension de la bande abrasive, sans augmenter l'encombrement de l'ensemble.The tool is advantageously provided with two hooking devices ultra-flat, arranged on the upper surface of the tool body opposite to the contact surface, ensuring good attachment and good tension of the abrasive belt, without increasing the size of all.

Selon un premier mode de réalisation, le corps principal d'outil est une bande métallique rigide d'épaisseur sensiblement constante et faible.According to a first embodiment, the main body of tool is a rigid metal strip of substantially thick constant and weak.

Selon un second mode de réalisation, le corps principal comprend une partie inférieure en forme générale de bande suivant l'incurvation de la surface de contact, et une partie supérieure formant une nervure centrale de rigidification solidaire de la partie inférieure et dont l'arête supérieure est seulement légèrement au-dessus du plan joignant les deux extrémités longitudinales de la surface de contact.According to a second embodiment, the main body includes a lower part in the general shape of the following strip the curvature of the contact surface, and an upper part forming a central stiffening rib secured to the lower part and whose upper edge is only slightly above the plane joining the two longitudinal ends of the contact surface.

De préférence, une partie de surface supérieure du corps d'outil située entre le dispositif d'accrochage et l'extrémité correspondante est recouverte d'une couche de matière élastiquement déformable, et est légèrement inclinée au-dessus du plan joignant les deux extrémités longitudinales de la surface de contact.Preferably, an upper surface part of the body of tool located between the hooking device and the corresponding end is covered with a layer of elastically deformable material, and is slightly inclined above the plane joining the two longitudinal ends of the contact surface.

Une comparaison avec les principaux outils à main connus permettant la fonction de ponçage par bande abrasive amovible montre que l'outil selon la présente invention présente une supériorité nette sur les outils connus, pour plusieurs fonctions importantes : il s'avère que l'outil de l'invention est beaucoup plus maniable, présente un poids et un encombrement plus réduits pour une même surface utile, permet une précision de ponçage nettement améliorée grâce à la forme particulière de l'outil, et permet d'utiliser toute la surface utile de la bande abrasive. En outre, il permet de réaliser un travail de ponçage sur les surfaces courbes intérieures, il permet l'accessibilité de surfaces à poncer à l'intérieur de fentes ou de petites cavités. Ces améliorations démontrent le progrès technique réalisé par l'invention.A comparison with the main known hand tools allowing the sanding function by removable abrasive belt shows that the tool according to the present invention has a clear superiority over known tools, for several important functions: it turns out that the tool of the invention is much more manageable, has a weight and a smaller footprint for the same useful surface, allows a significantly improved sanding accuracy due to the special shape of the tool, and allows to use all the useful surface of the strip abrasive. In addition, it allows sanding work on the interior curved surfaces, it allows accessibility of surfaces to sand inside cracks or small cavities. These improvements demonstrate the technical progress achieved by the invention.

BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

D'autres objets, caractéristiques et avantages de la présente invention ressortiront de la description suivante d'un mode de réalisation particulier, faite en relation avec les figures jointes, parmi lesquelles :

  • la figure 1 est une vue de côté d'un outil selon un premier mode de réalisation de la présente invention, portant une bande abrasive ;
  • la figure 2 est une vue de dessus de l'outil de la figure 1, bande abrasive enlevée ;
  • la figure 3 est une vue partielle, en vue de dessus, d'une extrémité de corps d'outil selon la figure 2 ;
  • la figure 4 est une vue de l'extrémité de corps d'outil de la figure 3, en coupe longitudinale selon le plan A-A ;
  • la figure 5 est une vue de dessus d'un levier d'actionnement de dispositif d'accrochage de bande abrasive ;
  • la figure 6 est une vue de côté du levier d'actionnement de la figure 5 ;
  • la figure 7 illustre, en vue de côté, l'utilisation de l'outil selon la présente invention pour polissage d'une partie centrale de surface ;
  • la figure 8 est une vue de côté d'un outil selon un second mode de réalisation de la présente invention, portant une bande abrasive ;
  • la figure 9 est une vue de dessus de l'outil de la figure 8, bande abrasive enlevee ;
  • la figure 10 est une vue de côté en coupe à plus grande échelle, montrant une moitié de l'outil de la figure 8 ; et
  • les figures 11 à 14 illustrent des coupes transversales selon les plans respectifs M, B, C et D de la figure 10.
Other objects, characteristics and advantages of the present invention will emerge from the following description of a particular embodiment, given in relation to the attached figures, among which:
  • Figure 1 is a side view of a tool according to a first embodiment of the present invention, carrying an abrasive belt;
  • Figure 2 is a top view of the tool of Figure 1, abrasive strip removed;
  • Figure 3 is a partial view, in top view, of a tool body end according to Figure 2;
  • Figure 4 is a view of the tool body end of Figure 3, in longitudinal section along the plane AA;
  • Figure 5 is a top view of an operating lever of the abrasive belt hooking device;
  • Figure 6 is a side view of the actuating lever of Figure 5;
  • FIG. 7 illustrates, in side view, the use of the tool according to the present invention for polishing a central surface part;
  • Figure 8 is a side view of a tool according to a second embodiment of the present invention, carrying an abrasive belt;
  • Figure 9 is a top view of the tool of Figure 8, abrasive strip removed;
  • Figure 10 is a sectional side view on a larger scale, showing one half of the tool of Figure 8; and
  • FIGS. 11 to 14 illustrate cross sections along the respective planes M, B, C and D of FIG. 10.

DESCRIPTION DES MODES DE REALISATION PREFERESDESCRIPTION OF THE PREFERRED EMBODIMENTS

Dans le mode de réalisation des figures 1 et 2, l'outil à main selon la présente invention comprend un corps principal 1 rigide, formé d'une bande de matière rigide de faible épaisseur et allongée, incurvée dans le sens de sa longueur pour présenter une surface de contact 2 convexe.In the embodiment of Figures 1 and 2, the hand tool according to the present invention comprises a rigid main body 1, formed a strip of rigid material of small thickness and elongated, curved lengthwise to present a contact surface 2 convex.

Sur sa surface supérieure 3 opposée à la surface de contact 2, l'outil comprend deux dispositifs d'accrochage 4 et 5 opposés, disposés respectivement au voisinage de chacune des extrémités longitudinales 21 et 22 du corps principal 1. Chacun des dispositifs d'accrochage 4 et 5 est conformé pour retenir l'une des extrémités longitudinales d'une bande abrasive 6 plaquée sur la surface de contact 2 et passée sur les deux extrémités 21 et 22 respectives du corps principal 1.On its upper surface 3 opposite the contact surface 2, the tool comprises two opposite hooking devices 4 and 5, arranged respectively in the vicinity of each of the longitudinal ends 21 and 22 of the main body 1. Each of the hooking devices 4 and 5 is shaped to retain one of the longitudinal ends of a abrasive strip 6 pressed against the contact surface 2 and passed over the two respective ends 21 and 22 of the main body 1.

Le corps principal rigide 1 est revêtu d'une couche de matière élastiquement déformable 9, formant la surface de contact 2 convexe. On choisira avantageusement une matière élastiquement déformable dont la dureté est comprise entre 30 et 40 de l'échelle SHORE.The rigid main body 1 is coated with a layer of material elastically deformable 9, forming the convex contact surface 2. We advantageously choose an elastically deformable material whose hardness is between 30 and 40 on the SHORE scale.

Dans le mode de réalisation représenté, les dispositifs d'accrochage 4 et 5 sont disposés légèrement à l'écart des extrémités 21 et 22 du corps principal, laissant une longueur L de surface supérieure 3 de corps pouvant être recouverte par une portion de bande abrasive 6. De cette façon, la portion de bande abrasive 6 située entre l'extrémité 21 et le dispositif d'accrochage correspondant 4 peut être également utilisée pour polir ou ébavurer une pièce, par exemple dans un interstice ou une fente. Les deux faces de l'outil sont ainsi utilisables dans la zone d'extrémité. Sur une partie de cette longueur L de surface supérieure 3, le corps principal 1 est éventuellement muni, dans chacune des zones d'extrémité 7 et 8, d'une couche de matière élastiquement déformable telle que la couche 10, sans toutefois que cela soit indispensable.In the embodiment shown, the devices hooking 4 and 5 are arranged slightly away from the ends 21 and 22 of the main body, leaving a length L of upper surface 3 of body which can be covered by a portion of abrasive band 6. In this way, the portion of abrasive belt 6 located between the end 21 and the corresponding attachment device 4 can also be used to polish or deburr a part, for example in a gap or slot. The two sides of the tool are thus usable in the end zone. Over part of this length L upper surface 3, the main body 1 is optionally provided, in each of the end zones 7 and 8, a layer of material elastically deformable such as layer 10, but without this is essential.

Selon le mode de réalisation représenté, chacun des dispositifs d'accrochage tel que le dispositif 4 comprend un levier 11 articulé selon un axe transversal 12 et se développant parallèlement au corps principal 1. Le levier 11 comprend un bras de pincement 13 orienté vers l'extrémité correspondante 21 du corps principal 1 et comportant un rebord 14 transversal incurvé vers le corps principal 1. Le levier 11 comprend, à l'opposé, un bras d'actionnement 15 légèrement écarté de la surface supérieure du corps principal 1 pour permettre l'actionnement et le pivotement du levier 11 par pression sur le bras d'actionnement 15.According to the embodiment shown, each of the devices attachment such that the device 4 comprises a lever 11 articulated along a transverse axis 12 and developing parallel to the body main 1. The lever 11 comprises a pinch arm 13 oriented towards the corresponding end 21 of the main body 1 and comprising a transverse rim 14 curved towards the main body 1. The lever 11 comprises, in contrast, an actuating arm 15 slightly spaced from the upper surface of main body 1 to allow actuation and the pivoting of the lever 11 by pressing on the actuating arm 15.

Une rainure transversale 16 est ménagée sur la surface supérieure du corps principal 1, limitée par une arête vive 17 du côté de l'extrémité correspondante 21 de corps et par une dépouille 18 de l'autre côté, comme le représente plus en détail la figure 4. Le levier 11 est disposé de telle manière que le rebord transversal 14 vienne s'engager dans la rainure transversale 16.A transverse groove 16 is formed on the surface upper part of main body 1, limited by a sharp edge 17 on the side of the corresponding end 21 of the body and by a draft 18 of the other side, as shown in more detail in Figure 4. The lever 11 is arranged so that the transverse edge 14 comes engage in the transverse groove 16.

Un moyen élastique sollicite le levier 11 pour plaquer le rebord transversal 14 en appui dans la rainure transversale 16 contre le corps principal 1.An elastic means urges the lever 11 to press the transverse rim 14 bearing in the transverse groove 16 against the main body 1.

Pour diminuer l'épaisseur totale de l'outil, le levier 11 est avantageusement logé en regard d'un évidement 19 ménagé sur la surface supérieure du corps d'outil 1.To reduce the total thickness of the tool, lever 11 is advantageously housed opposite a recess 19 formed on the surface upper part of tool body 1.

Selon un mode de réalisation avantageux, le moyen élastique est une lame ressort logée dans l'évidement 19 de la face supérieure 3 du corps principal 1, et en appui sur le corps principal et sur le bras d'actionnement 15 du levier 11.According to an advantageous embodiment, the elastic means is a leaf spring housed in the recess 19 of the upper face 3 of the main body 1, and resting on the main body and on the arm actuation 15 of lever 11.

La largeur du levier 11, ou dimension dans son sens transversal, est avantageusement plus faible que la largeur du corps principal 1. De cette façon, lorsque l'utilisateur prend l'outil en pleine main, la main exerce une pression principalement sur le corps d'outil 1, et n'exerce pas une pression importante sur le levier 11, évitant de décrocher intempestivement la bande abrasive.The width of the lever 11, or dimension in its transverse direction, is advantageously less than the width of the main body 1. In this way, when the user takes the tool in full hand, the hand exerts pressure mainly on the tool body 1, and does not exert significant pressure on the lever 11, avoiding inadvertently unhooking the abrasive belt.

Comme le représentent les figures 5 et 6, le levier 11 comprend avantageusement un bras d'actionnement 15 légèrement relevé angulairement par rapport au bras de pincement 13, pour augmenter l'angle de pivotement admissible du levier 11 sans toutefois augmenter exagérément l'encombrement du levier 11 au-dessus de la surface supérieure de corps d'outil 1. Le corps d'outil 1 est entièrement situé d'un même côté du plan S passant par les deux extrémités longitudinales 21 et 22.As shown in Figures 5 and 6, the lever 11 comprises advantageously an actuating arm 15 slightly angularly raised relative to the pinch arm 13, to increase the angle of permissible pivoting of lever 11 without, however, increasing excessively the size of the lever 11 above the upper body surface of tool 1. The tool body 1 is entirely located on the same side of the plane S passing through the two longitudinal ends 21 and 22.

Selon un mode de réalisation avantageux, tel que représenté sur la figure 1, le corps principal 1 comprend deux portions d'extrémité dont la surface de contact est plane sur une longueur P. On peut prévoir une portion de surface de contact plane dans chacune des zones d'extrémités 7 et 8, ou dans l'une des deux zones d'extrémités. La portion de surface de contact plane selon la longueur P peut se raccorder soit tangentiellement soit angulairement à la zone adjacente de surface de contact 2 convexe.According to an advantageous embodiment, as shown in Figure 1, the main body 1 comprises two end portions whose contact surface is flat over a length P. It can be provided a portion of planar contact surface in each of the zones ends 7 and 8, or in one of the two end zones. The portion of planar contact surface along the length P can be connect either tangentially or angularly to the adjacent area contact surface 2 convex.

La longueur totale et l'incurvation du corps principal 1 sont choisies de préférence de façon qu'un espace suffisant soit réalisé pour le passage des doigts de main d'un utilisateur au voisinage d'une extrémité de l'outil lorsque la surface de contact est en appui sur un plan au voisinage de son autre extrémité. Cette disposition est illustrée sur la figure 7, dans laquelle l'outil est en contact d'une surface plane à polir 20 par sa zone de contact proche de sa première extrémité 21. La zone proche de sa seconde extrémité 22 se trouve alors, grâce à l'incurvation du corps principal 1, écartée de la surface 20 à polir selon un espace de valeur H suffisante pour que l'utilisateur puisse entourer la zone d'extrémité 8 avec sa main, ses doigts pouvant passer librement entre ladite zone d'extrémité 8 et la surface 20 à polir sans toucher ladite surface. L'outil est ainsi utilisable pour polir une zone centrale de surface 20 plane, sans nécessiter l'adaptation d'une poignée de préhension sur la surface supérieure de l'outil comme cela est nécessaire dans les outils connus. Et toute la surface de contact convexe reste utilisable pour polir une pièce.The total length and the curvature of the main body 1 are preferably chosen so that sufficient space is provided for the passage of a user's fingers in the vicinity of a end of the tool when the contact surface is supported on a plane near its other end. This provision is illustrated in FIG. 7, in which the tool is in contact with a flat surface to be polished 20 by its contact area close to its first end 21. The area close to its second end 22 is then found, thanks to the curvature of the main body 1, spaced from the surface 20 to polish according to a space of value H sufficient for the user can surround the end zone 8 with his hand, his fingers being able pass freely between said end zone 8 and the surface 20 to polish without touching said surface. The tool can thus be used for polish a central area of flat surface 20, without requiring adaptation a grip handle on the upper surface of the tool as is necessary in known tools. And the whole surface of convex contact remains usable for polishing a workpiece.

De bons résultats peuvent être obtenus avec un tel outil dont les dimensions principales sont les suivantes : la longueur totale du corps principal 1 peut être comprise entre 25 et 35 centimètres environ ; son incurvation est définie par un rayon compris entre 40 et 60 centimètres environ ; la largeur du corps principal est avantageusement inférieure à 12 centimètres environ, par exemple égale à 4 centimètres environ ; la distance L entre l'extrémité correspondante et le dispositif d'accrochage est comprise entre 10 et 40 millimètres, distance qui réalise un bon compromis : une longueur trop courte ne présenterait pas d'intérêt et le levier constituerait une gêne ; une longueur trop longue entrainerait une mauvaise tenue de la bande abrasive. La longueur P de la zone d'extrémité plane peut être égale à 4 centimètres environ.Good results can be obtained with such a tool, the main dimensions are as follows: the total length of the main body 1 can be between 25 and 35 centimeters about ; its curvature is defined by a radius between 40 and About 60 centimeters; the width of the main body is advantageously less than about 12 centimeters, for example equal to 4 about centimeters; the distance L between the corresponding end and the attachment device is between 10 and 40 millimeters, distance which achieves a good compromise: a too short length does not would be of no interest and leverage would be a nuisance; a too long length would lead to poor tape resistance abrasive. The length P of the flat end zone can be equal to 4 about centimeters.

Le mode de réalisation représenté sur les figures 8 à 14 reprend les mêmes moyens essentiels. On retrouve un corps 1 présentant une surface de contact 2 convexe et incurvée dans le sens de sa longueur et recouverte d'une couche de matière élastiquement déformable 9. La surface de contact 2 et le corps 1 se terminent par deux extrémités longitudinales respectives 21 et 22. La surface supérieure 3 du corps 1 reste en tout point au-dessous ou seulement légèrement au-dessus du plan S passant par lesdites extrémités longitudinales 21 et 22, de sorte que le corps principal 1 présente une faible épaisseur, aussi bien par rapport à sa longueur que par rapport à sa largeur.The embodiment shown in Figures 8 to 14 uses the same essential means. We find a body 1 presenting a contact surface 2 which is convex and curved lengthwise and covered with a layer of elastically deformable material 9. The contact surface 2 and body 1 end at two ends respective longitudinal 21 and 22. The upper surface 3 of the body 1 stays at any point below or only slightly above the plane S passing through said longitudinal ends 21 and 22, so that the main body 1 has a small thickness, both by compared to its length than compared to its width.

Comme dans le mode de réalisation précédent, deux dispositifs d'accrochage 4 et 5 sont placés sur la surface supérieure 3 du corps 1, en retrait et à une distance L de l'extrémité correspondante 21 ou 22 d'outil. La distance L est comprise entre 10 et 40 millimètres environ. Les parties de surface supérieure 3 situées entre chaque dispositif d'accrochage 4 ou 5 et l'extrémité correspondante 21 ou 22 de l'outil sont éventuellement recouvertes d'une couche de matière élastiquement déformable, sans toutefois que cela soit indispensable. Dans ce mode de réalisation, ces parties d'extrémité de surface supérieure 3 sont en outre inclinées légèrement au-dessus du plan S passant par les deux extrémités longitudinales 21 et 22 de la surface de contact 2, comme représenté par exemple sur les figures 8 et 10. Grâce à cette inclinaison, l'outil peut porter sur une surface plane à poncer, par l'une des parties d'extrémité de surface supérieure 3, par exemple la partie de surface 23, sans que le reste du corps d'outil constitue une gêne.As in the previous embodiment, two devices attachment 4 and 5 are placed on the upper surface 3 of the body 1, set back and at a distance L from the corresponding end 21 or 22 of tool. The distance L is between 10 and 40 millimeters approximately. The upper surface parts 3 located between each device 4 or 5 and the corresponding end 21 or 22 of the tool are optionally covered with a layer of material elastically deformable, without however being essential. In this mode of embodiment, these upper surface end portions 3 are in further inclined slightly above the S plane passing through the two longitudinal ends 21 and 22 of the contact surface 2, as shown for example in Figures 8 and 10. Thanks to this tilt, the tool can rest on a flat surface to be sanded, for one of the upper surface end portions 3, for example the surface part 23, without the rest of the tool body constituting a uncomfortable.

Dons ce mode de réalisation des figures 8 à 14, le corps principal 1 comprend une partie inférieure 24 en forme générale de bande suivant l'incurvation de la surface de contact 2, et une partie supérieure 25 formant une nervure centrale longitudinale de rigidification. La partie supérieure 25 est solidaire de la partie inférieure 24. Son arête supérieure 26 est légèrement au-dessus du plan S passant par les deux extrémités 21 et 22 longitudinales de la surface de contact 2.Let's give this embodiment of Figures 8 to 14, the body main 1 includes a lower part 24 in the general shape of a strip following the curvature of the contact surface 2, and a part upper 25 forming a longitudinal central stiffening rib. The upper part 25 is integral with the lower part 24. Its upper edge 26 is slightly above the plane S passing through the two longitudinal ends 21 and 22 of the contact surface 2.

De préférence, la portion centrale 27 de partie supérieure 25 est rétrécie pour former deux évidements latéraux 28 et 29 pouvant constituer une zone de préhension dans laquelle les doigts de l'utilisateur peuvent pénétrer.Preferably, the central portion 27 of the upper part 25 is narrowed to form two lateral recesses 28 and 29 which can constitute a gripping area in which the user's fingers can penetrate.

Dans ce mode de réalisation, chaque dispositif d'accrochage 4 ou 5 a une structure qui diffère du mode de réalisation précédent. Comme représenté sur les figures 10 et 13, le dispositif d'accrochage 5 comprend une lame ressort longitudinale 30 dont une extrémité comporte un rebord transversal 31 incurvé vers le corps 1 et orienté vers l'extrémité correspondante 22 du corps d'outil. Son autre extrémité 32 porte contre le corps, dans lequel elle est encastrée. La partie centrale 33 de la lame ressort 30 est à l'écart du corps 1.In this embodiment, each attachment device 4 or 5 has a structure which differs from the previous embodiment. As shown in Figures 10 and 13, the attachment device 5 includes a longitudinal spring leaf 30, one end of which has a transverse rim 31 curved towards the body 1 and oriented towards the corresponding end 22 of the tool body. Its other end 32 door against the body, in which it is embedded. The part central 33 of the leaf spring 30 is away from the body 1.

Un coulisseau supérieur 34 est en appui sur la surface supérieure de la lame ressort longitudinale 30. Le coulisseau 34 est guidé en coulissement longitudinal sur le corps 1 entre une position de pincement représentée sur la figure 10 dans laquelle il pousse la lame ressort 30 vers le corps 1 pour tenir son rebord transversal incurvé 31 en appui vers le corps, de façon à pincer une extrémité de bande abrasive insérée entre le corps et le rebord transversal incurvé 31, et une position de retrait dans laquelle il libère la lame ressort 30 qui, sous l'action de son élasticité, écarte son rebord transversal 31 à l'écart du corps 1 pour permettre le passage de l'extrémité de bande abrasive. Un bossage 35 est prévu sur la surface supérieure de la lame ressort 30, pour s'engager sous un logement correspondant du coulisseau 34 en position de pincement, pour retenir le coulisseau 34 dans cette position de pincement.An upper slide 34 is supported on the surface upper of the longitudinal spring leaf 30. The slide 34 is guided in longitudinal sliding on the body 1 between a position of pinch shown in Figure 10 in which it pushes the blade spring 30 towards the body 1 to hold its curved transverse edge 31 resting towards the body, so as to pinch one end of the strip abrasive inserted between the body and the curved transverse rim 31, and a withdrawal position in which it releases the leaf spring 30 which, under the action of its elasticity, spreads its transverse edge 31 to away from the body 1 to allow the passage of the strip end abrasive. A boss 35 is provided on the upper surface of the blade spring 30, to engage under a corresponding housing of the slide 34 in the pinch position, to retain the slide 34 in this pinch position.

Dans le mode de réalisation des figures 8 à 14, le corps 1 peut être réalisé par moulage de matière plastique, en deux parties 24 et 25 assemblées l'une à l'autre par soudage. In the embodiment of FIGS. 8 to 14, the body 1 can be made by plastic molding, in two parts 24 and 25 joined together by welding.

Dans l'un et l'autre des modes de réalisation, les dispositifs mécaniques d'accrochage 4 et 5 peuvent être remplacés par des moyens d'accrochage différents, par exemple : la bande abrasive peut avoir une face intérieure auto-adhésive ; ou l'accrochage peut être assuré par des surfaces auto-agrippantes à crochets et boucles.In either embodiment, the devices attachment mechanisms 4 and 5 can be replaced by means different attachment points, for example: the abrasive belt may have a self-adhesive inside; or the attachment can be ensured by hook-and-loop hook-and-loop surfaces.

La présente invention n'est pas limitée aux modes de réalisation qui ont été explicitement décrits, mais elle en inclut les diverses variantes et généralisations contenues dans le domaine des revendications ci-après.The present invention is not limited to the embodiments which have been explicitly described, but it includes the various variants and generalizations contained in the field of claims below.

Claims (10)

  1. Hand tool for polishing or deburring, including a main stiff body (1) with a mating surface (2) along its entire length between the two longitudinal ends (21, 22) thereof and including hanging means (4,5) for holding in place an abrasive strip (6) which is placed against the mating surface (2), characterized in that :
    the mating surface (2) is convex and curved lengthwise, and is covered with a layer of a resiliently deformable matter (9),
    the main body (1) is of a scant thickness, the upper surface thereof (3) remaining under or slightly above the plane (S) at all points passing through the two longitudinal ends (21, 22) of the mating surface (2).
  2. Tool according to Claim 1, characterized in that the length and the curve of the mating surface (2) are selected in such a manner that a space of an adequate value (H) is created to enable a user to pass his fingers into an end zone (8) of the tool when the mating surface (2) is resting on a plane (20) along its other end zone (7).
  3. Tool according to Claim 2, characterized in that the length of the main body (1) is between approximately 25 and 35 centimetres and that the radius of the curve is between approximately 40 and 60 centimetres.
  4. Tool according to any one of Claims 1 to 3, characterized in that the width of the main body (1) is less than approximately 12 centimetres.
  5. Tool according to any one of Claims 1 to 4 characterised in that the hanging means include two opposed hanging devices (4, 5) placed on the upper surface (3) of the body (1) opposite the mating surface (2) set back at a distance (L) from the corresponding end (21, 22) of the tool, the said distance (L) being between approximately 10 and 40 millimetres.
  6. Tool according to Claim 5, characterized in that one part of the upper surface (3) of the tool body (1) situated between the hanging device (4, 5) and the corresponding end (21, 22) is slightly sloping above the plane (S) and passing through the two longitudinal ends (21, 22) of the mating surface (2).
  7. Tool according to any one of Claims 1 to 6, characterized in that the main body (1) is a rigid metallic strip of a substantially constant and scant thickness.
  8. Tool according to any one of Claims 1 to 6, characterized in that the main body (1) includes a lower part (24) generally forming a strip following the curve of the mating surface (2), and an upper part (25) which forms a central stiffening rib integral with the lower part (24) and the upper edge (26) of which is only slightly above the plane (S).
  9. Tool according to Claim 5, characterized in that each hanging device (4 5) includes :
    a lever (11) articulated along a transversal axis (12) and evoluting in parallel to the main body (1), with the lever including a pinching arm (13) with cross edge (14) curved towards the body and orientated towards the corresponding end (21) of the tool body and including an opposed actuation arm (15),
    a transversal groove (16) provided on the upper surface (3) of the main body (1), restricted by a feather edge (17) and a relief (18), and positioned in order to accomodate the transversal curved edge (14) of the lever (11),
    a resilient means stressing the lever (11) in order to push the transversal edge (14) into the said transversal groove (16).
  10. Tool according to Claim 5, characterized in that each hanging means (4, 5) includes :
    a longitudinal spring plate (30) one end of which includes a transversal edge (31) curved towards the body (1) and orientated towards the corresponding end (22) of the tool body (1), the other end of which (32) bears against the body (1), and the central part of which (33) is separated from the body (1),
    an upper guide rod (34), resting on the upper face of the longitudinal spring plate (30), and running longitudinally along the body (1) between a pinching position in which it pushes the springplate (30) towards the body (1) in order to keep the curved transversal edge thereof (31) bearing towards the body (1) in order to pinch an end of the abrasive strip, and a recess position in which it releases the spring plate (30) which because of its resilience, distances the transversal edge thereof (31) from the body (1) in order to enable the end of the abrasive strip to pass through.
EP93910130A 1992-05-20 1993-05-18 Exceptionally flat hand tool for polishing or deburring Expired - Lifetime EP0725707B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9206346 1992-05-20
FR9206346A FR2691393B1 (en) 1992-05-20 1992-05-20 EXTRA-FLAT HAND TOOL FOR POLISHING AND DEBURRING.
PCT/FR1993/000478 WO1993023205A1 (en) 1992-05-20 1993-05-18 Exceptionally flat hand tool for polishing or deburring

Publications (2)

Publication Number Publication Date
EP0725707A1 EP0725707A1 (en) 1996-08-14
EP0725707B1 true EP0725707B1 (en) 1998-01-21

Family

ID=9430126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93910130A Expired - Lifetime EP0725707B1 (en) 1992-05-20 1993-05-18 Exceptionally flat hand tool for polishing or deburring

Country Status (4)

Country Link
EP (1) EP0725707B1 (en)
DE (1) DE69316662T2 (en)
FR (1) FR2691393B1 (en)
WO (1) WO1993023205A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19608969A1 (en) * 1996-03-08 1997-09-11 Bosch Gmbh Robert Electric hand grinder

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1455559A (en) * 1921-10-31 1923-05-15 Archibald F Wright Rubbing block
US2428618A (en) * 1945-07-25 1947-10-07 Dispensiere Joseph Abrasive sheet holder
DE872020C (en) * 1951-05-24 1953-03-22 Christoph Mueller Sanding belt file
US2878625A (en) * 1958-05-19 1959-03-24 Clark Suds Return Systems Inc Holder for abrasive strips
DE1577588A1 (en) * 1966-09-23 1970-01-02 Joachim Jung Tear connection for quick replacement of tool sheets or the like.
US3722150A (en) * 1971-06-30 1973-03-27 A Pass Abrading device to clean surfaces
GB2114028A (en) * 1982-02-04 1983-08-17 Plas Plugs Ltd Improvements in or relating to abrasive hand tools
DE8702382U1 (en) * 1987-02-17 1987-06-11 Rauer, Ditmar, 4100 Duisburg Hand sanding sticks
US4944128A (en) * 1989-07-10 1990-07-31 Reiter John P Hand sander with automatic slack take-up feature

Also Published As

Publication number Publication date
FR2691393B1 (en) 1995-08-11
EP0725707A1 (en) 1996-08-14
WO1993023205A1 (en) 1993-11-25
DE69316662T2 (en) 1998-08-27
DE69316662D1 (en) 1998-02-26
FR2691393A1 (en) 1993-11-26

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