EP3042738B1 - Ponceuse a bras girafe comprenant un dispositif de protection contre la poussiere - Google Patents

Ponceuse a bras girafe comprenant un dispositif de protection contre la poussiere Download PDF

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Publication number
EP3042738B1
EP3042738B1 EP15202098.8A EP15202098A EP3042738B1 EP 3042738 B1 EP3042738 B1 EP 3042738B1 EP 15202098 A EP15202098 A EP 15202098A EP 3042738 B1 EP3042738 B1 EP 3042738B1
Authority
EP
European Patent Office
Prior art keywords
flange
recess
long
protective hood
grinding
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.)
Active
Application number
EP15202098.8A
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German (de)
English (en)
Other versions
EP3042738A2 (fr
EP3042738A3 (fr
Inventor
Alexander Rohde
Oliver Nyber
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Publication of EP3042738A2 publication Critical patent/EP3042738A2/fr
Publication of EP3042738A3 publication Critical patent/EP3042738A3/fr
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Publication of EP3042738B1 publication Critical patent/EP3042738B1/fr
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Classifications

    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/186—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools

Definitions

  • the invention relates to a long-neck sander with a dust protection device.
  • Such long-neck grinders are usually used to work on walls, especially after filling work in dry construction or to prepare a wall painting after renovation work.
  • Typical long-neck grinders according to the prior art have a rotating or oscillating grinding wheel which is arranged in a head part of the grinder.
  • the head part is usually arranged on an elongated handle, along which a drive unit for driving the grinding wheel is usually attached - usually by means of a flexible shaft.
  • a dust protection device is usually implemented in the vicinity of the grinding wheel, by means of which a suction space that is largely closed off from the surroundings is formed.
  • the grinding dust is usually extracted from the extraction space by means of an additional extraction device such as a vacuum cleaner.
  • flaps are usually mechanically complex and prone to failure; furthermore, the opening and closing of the flaps (for Transition from grinding close to the edge to grinding away from the edge and vice versa) it is usually necessary to set the grinder down from the processed surface, which makes work even more difficult.
  • the present invention sets itself the task of creating a long-neck sander which enables the transition from grinding close to the edge to grinding away from the edge and vice versa in a mechanically robust and user-friendly manner.
  • the long-neck sander according to the invention has a drive unit for driving a rotatable or oscillatable grinding wheel, the grinding wheel being at least partially surrounded by a dust protection device.
  • the dust protection device has an at least partially encircling, in particular cylinder jacket-shaped, sealing flange for creating a suction space in the vicinity of the grinding wheel.
  • the sealing flange is provided with a recess in a certain circumferential section. The recess allows the grinding wheel to come closer to the edge when grinding close to the edge in order to be able to grind the processed surface as completely as possible.
  • the dust protection deposit is designed in two parts, the first part being formed by a protective hood.
  • the protective hood can in particular serve to cover the suction space in a direction vertical to the machined surface and can be designed essentially in the shape of a circular disk.
  • cylinder jacket-shaped - sealing flange in this way a pot-shaped space can be formed which, in cooperation with the machined surface, realizes a largely closed suction space.
  • the second part is formed by means of an adjustment flange that can be rotated with respect to the protective hood, the adjustment flange being rotated about an axis that is essentially vertical to the machined surface.
  • the sealing flange is arranged on the adjustment flange. In the case of a cylinder jacket-shaped design of the sealing flange, the rotation thus takes place in the circumferential direction of the dust protection device or the sealing flange.
  • the recess creates a connection between the suction space and the environment, so that the grinding wheel in this recess can maximally approach an adjacent surface and grinding close to the edge is possible.
  • the unwanted escape of grinding dust is avoided in that the recess is still covered by the adjacent wall and the grinding dust can be efficiently extracted from the suction space.
  • the recess In a second rotary position, the recess is covered so that a suction space that is largely closed off from the outside can be implemented when grinding away from the edge.
  • the recess is covered in the second rotational position, i.e. in the "grinding away from the edge" operating mode, in that an essentially ring segment-like sealing lip is arranged on the protective hood, which in the second rotational position overlaps the recess of the sealing flange and in particular covers it .
  • the sealing lip is arranged within the suction space and is able to cover the recess from the inside of the suction space in the second rotational position.
  • the protective hood can be connected to the adjustment flange in particular via a slide bearing.
  • the plain bearing can have two concentric, ring-shaped flanges be formed, of which the first connected to the protective hood and the second connected to the adjusting flange, in particular can be formed in one piece.
  • the two flanges can have similar or identical inner or outer radii and in particular can be arranged on top of one another.
  • the flanges can be held on top of one another by means of brackets. When twisted, the two flanges slide on one another in a rotational manner via their common axis of rotational symmetry.
  • the adjustment flange has a planar sliding section for sliding along, in particular on a wall or ceiling.
  • the sliding section is arranged in the area of the recess so that the grinding wheel can optimally reach the area of the surface to be machined close to the edge.
  • the planar sliding section can be used in an advantageous manner in order to cause the two parts of the dust protection device to rotate relative to one another when changing from one operating mode to the other.
  • the operator presses the dust protection device with the flat sliding section against the surface adjacent to the machined surface, that is to say, for example, when machining the ceiling, against the wall vertically adjoining underneath. Simply by turning the handle, the two parts of the dust protection device can be rotated in an ergonomically favorable manner without having to remove the grinder.
  • the flat sliding section shows a recess and is designed in such a way that the outer circumference of the grinding wheel approaches an adjacent room inner surface up to a distance of less than 10 mm, in particular less than 5 mm, complete processing of room inner surfaces by means of the Long-neck sander according to the invention are made possible.
  • locking elements can be provided to fix the protective hood and the adjustment flange against one another.
  • a locking element can be designed as a flat section on the adjustment flange; a latching element corresponding to this can also be designed as a flat section on a sealing lip. By placing both flat surfaces against one another, anti-twist protection can be implemented.
  • a locking element can be designed as a ring segment-like rib on the adjusting flange; a further latching element is in this case designed as a recess on the protective hood that corresponds to the ring segment-like rib.
  • a reverse arrangement is of course also possible.
  • Figure 1 is a schematic representation of a head part of a long-neck sander according to the invention.
  • the long-neck sander has a fork 1 into which a handle (not shown here) can usually be inserted.
  • the fork 1 is mounted on a swivel flange 3 so that it can be swiveled about an axis A, so that an ergonomically favorable angle can be set between the handle and the surface to be processed, depending on the respective work situation.
  • the swivel flange is in turn mounted pivotably about a longitudinal axis B by means of the bearing bracket 7 arranged on a protective hood 4, which results in a further possibility of enabling ergonomically favorable conditions when machining surfaces with a wide variety of orientations.
  • the swivel flange 3 has an opening 2 through which a flexible shaft, likewise not shown in the figure, for driving a sanding plate can pass in a manner known per se.
  • the flexible shaft is still guided in the hollow handle in the direction of a drive unit;
  • the hollow handle can also serve to enable dust extraction in a manner which is also known per se.
  • a vacuum cleaner for example, can be connected to the end of the handle facing away from the head part.
  • the dust protection device itself is designed in two parts using the protective hood 4 already described above and an outer adjustment flange 6.
  • the adjustment flange 6 is designed to be rotatable in the circumferential direction with respect to the protective hood 4 by means of a slide bearing.
  • an outer flange 41 of the protective hood 4 is provided with an in Figure 1 Not visible inner flange of the adjustment flange 6 is brought into congruence and held on this rotatably in the circumferential direction by means of holding brackets 5.
  • the adjustment flange 6 also has a planar sliding section 61 for sliding along, in particular on a wall or ceiling in the area of an inner edge of a room, the sliding section 61 being provided with an edge protection 62 which allows the head part to slide gently on the corresponding room edge enables.
  • the head part of the long-neck sander according to the invention is designed in such a way that the closest possible approach of a sanding plate to the corresponding edge is ensured in order to enable the respective surface to be processed as completely as possible. For this, reference is made to the following figures.
  • the planar design of the sliding section 61 essentially achieves two effects: On the one hand, it prevents the head part from applying too much pressure locally to the corresponding room edge, which could damage the neighboring surface, which may have already been finished.
  • the flat sliding section 61 can advantageously be used as a contact surface when the adjusting flange 6 is rotated relative to the protective hood 4, in particular when changing from grinding close to the edge to grinding away from the edge.
  • the user brings the flat sliding section 61 into contact with the neighboring surface, which is usually perpendicular to the surface being worked on, and uses this as an abutment when the adjusting flange 6 is rotated with respect to the protective hood 4. It is particularly advantageous that In contrast to the prior art, the user does not have to put down the long-neck sander in order to switch from one operating mode to the other. This enables ergonomic and, moreover, efficient work.
  • Figure 2 shows a further perspective view of a head part of a long-neck sander according to the invention from the side facing the surface to be sanded in the "sanding close to the edge" operating mode.
  • a foam pad 81 which is arranged on the only partially visible sanding plate 8, can be clearly seen here.
  • the foam pad 81 is designed in such a way that it can accommodate exchangeable grinding disks arranged thereon, for example by means of a Velcro fastener.
  • FIG. 2 Well recognizable in Figure 2 is a sealing flange designed as a circumferential brush ring 10, which is arranged on the adjustment flange 6 and to create a The suction chamber is largely sealed off from the environment.
  • the brush ring 10 has the recess 101 through which the foam pad 81 partially passes.
  • the recess 101 in the brush ring corresponds to a recess 613 in the planar sliding section 61.
  • the planar sliding section 61 is designed in such a way that the outer circumference of the foam pad 81 with a grinding wheel placed thereon comes in close proximity to that plane which passes through the Sanding plate facing away from the edge protection 62 is formed.
  • the grinding wheel arranged on the foam pad also reaches the outermost edge areas of room walls, that is to say those areas in which one wall meets another wall or the ceiling.
  • the suction space is formed by the interaction of the brush ring 10 with the adjoining wall or ceiling of the space, through which the recess 613 in the sliding section 61 is covered.
  • the sealing lip 11 arranged on the protective hood 4 which is not visible in the figure, can be seen. In the operating position shown, it is not required to seal off the suction space from the outside.
  • the sealing lip 11 is in the position opposite the recess 613 of the sliding section 61, that is to say in the "grinding close to the edge" operating mode. In this position, sanding work can be carried out along an edge, as close as possible to a wall.
  • Figure 4 shows a first possibility for locking the protective hood 4 and the adjustment flange 6 against one another in the "grinding away from the edge" operating mode. This is done on the in the upper part of the Figure 4 A flat section 111 is arranged, which in the said operating mode comes to rest against a corresponding flat section 64 of the adjustment flange 6 and, in combination with a formation of the sealing lip 11 made of an elastic material and its fixed connection with the protective hood 4, inhibits the protective hood 4 and the adjustment flange 6 guaranteed against twisting against each other.
  • the sealing lip can in particular be made from a silicone or another abrasion-resistant elastomer.
  • Figure 5 shows a further variant of a possible latching of protective hood 4 and adjusting flange 6 against one another.
  • the adjustment flange 6 is provided with a ring segment-like rib 65 in the example shown, which corresponds to a correspondingly shaped recess 45 in the protective hood 4.
  • the two elements mentioned are in engagement with each other and thus prevent unwanted rotation of the adjustment flange 6 relative to the protective cover 4.
  • the protective cover can also be provided with a recess and the adjustment flange with a corresponding rib.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (8)

  1. Ponceuse à long col avec une unité d'entraînement pour l'entraînement d'une meule rotative ou oscillante, et avec un dispositif de protection contre la poussière en deux parties avec une bride d'étanchéité (10) au moins partiellement circonférentielle pour créer un espace d'aspiration à proximité de la meule, la meule étant au moins partiellement entourée par le dispositif de protection contre la poussière et la bride d'étanchéité (10) étant munie d'un évidement (101) dans une section circonférentielle spécifique, dans lequel la première partie du dispositif de protection contre la poussière est formée par un capot de protection (4) et la deuxième partie est formée au moyen d'une bride de réglage (6) pouvant tourner par rapport au capot de protection (4) autour d'un axe sensiblement orthogonal à un plan du disque de meulage, dans lequel la bride d'étanchéité (10) est disposée sur la bride de réglage (6), dans lequel, dans une première position de rotation de la bride de réglage (6), une liaison de la chambre d'aspiration avec l'environnement est créée par l'évidement (101) et dans une deuxième position de rotation de la bride de réglage (6), l'évidement (101) est ainsi recouvert, en ce qu'une lèvre d'étanchéité (11) essentiellement annulaire est disposée sur le capot de protection (4) et, dans la deuxième position de rotation, recouvre l'évidement de la bride d'étanchéité (6),
    caractérisé en ce que
    la lèvre d'étanchéité (11) est disposée à l'intérieur de la chambre d'aspiration et, dans la deuxième position de rotation, elle est capable de couvrir l'évidement (101) depuis l'intérieur de la chambre d'aspiration.
  2. Ponceuse à long manche selon la revendication 1,
    caractérisé en ce que
    le capot de protection (4) est relié à la bride de réglage (6) par un palier lisse.
  3. Ponceuse à long cou selon l'une des revendications précédentes,
    caractérisé en ce que
    la bride de réglage (6) présente, dans la région de l'évidement (101), une partie coulissante (61) de conception plate pour glisser le long d'une surface adjacente inclinée par rapport à la surface à usiner, en particulier un mur ou un plafond.
  4. Ponceuse à long cou selon la revendication 3,
    caractérisé en ce que
    la partie coulissante plate (61) présente un évidement (613) et est conçue de telle manière que la circonférence extérieure de la meule se rapproche de la surface adjacente jusqu'à une distance inférieure à 10 mm, en particulier inférieure à 5 mm.
  5. Ponceuse à long cou selon l'une des revendications précédentes,
    caractérisé en ce que
    des éléments de verrouillage (111, 64, 65, 45) sont prévus pour la fixation mutuelle du capot de protection (4) et de la bride de réglage (6).
  6. Ponceuse à long cou selon la revendication 5,
    caractérisé en ce que
    un élément d'encliquetage (64) est formé comme une section plate sur la bride de réglage (6) et un élément d'encliquetage correspondant (111) est formé comme une section plate sur la lèvre d'étanchéité (11).
  7. Ponceuse à long cou selon la revendication 5 ou 6,
    caractérisé en ce que
    un élément d'arrêt est formé comme une nervure annulaire en forme de segment (65) sur la bride de réglage (6) et un autre élément d'arrêt est formé comme un évidement (45) dans le capot de protection (4) correspondant à la nervure annulaire en forme de segment (65).
  8. Procédé de changement entre les modes de fonctionnement d'une ponceuse à long col selon l'une des revendications précédentes, selon lequel la ponceuse à long col est exploitée pendant un premier mode de fonctionnement pour le meulage loin du bord et pendant un deuxième mode de fonctionnement pour le meulage près du bord, dans lequel un dispositif de protection contre la poussière en deux parties entourant au moins partiellement la meule de la ponceuse à long col avec une bride d'étanchéité (10) au moins partiellement circonférentielle est utilisé pour former un espace d'extraction, dans lequel la bride d'étanchéité (10) est munie d'un évidement (101) dans une certaine partie circonférentielle, dans lequel la première partie du dispositif de protection contre la poussière est formée par un capot de protection (4) et la deuxième partie est formée au moyen d'une bride de réglage (6) sur laquelle est disposée la bride d'étanchéité (10), dans lequel la bride de réglage (6) est tournée par rapport au capot de protection (4) autour d'un axe sensiblement orthogonal à un plan du disque de meulage d'une première position de rotation à une deuxième position de rotation pour changer entre les modes de fonctionnement, dans lequel l'évidement (101) est couvert pour le fonctionnement de la ponceuse à long col dans le premier mode de fonctionnement et crée une connexion de la chambre d'aspiration à l'environnement pour le fonctionnement de la ponceuse à long col dans le second mode de fonctionnement,
    caractérisé en ce que
    une partie coulissante (61) de la bride de réglage (6), qui est plate dans la zone de l'évidement (101), est pressée contre une surface adjacente inclinée par rapport à la surface à usiner, après quoi une poignée de la ponceuse à long col, qui est reliée au capot de protection (4), est tournée pour provoquer la rotation du capot de protection (4) par rapport à la bride de réglage (6).
EP15202098.8A 2015-01-07 2015-12-22 Ponceuse a bras girafe comprenant un dispositif de protection contre la poussiere Active EP3042738B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015100118.7A DE102015100118A1 (de) 2015-01-07 2015-01-07 Langhalsschleifer mit Staubschutzeinrichtung

Publications (3)

Publication Number Publication Date
EP3042738A2 EP3042738A2 (fr) 2016-07-13
EP3042738A3 EP3042738A3 (fr) 2016-10-19
EP3042738B1 true EP3042738B1 (fr) 2020-08-12

Family

ID=54979566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15202098.8A Active EP3042738B1 (fr) 2015-01-07 2015-12-22 Ponceuse a bras girafe comprenant un dispositif de protection contre la poussiere

Country Status (2)

Country Link
EP (1) EP3042738B1 (fr)
DE (1) DE102015100118A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016106782A1 (de) * 2016-04-13 2017-10-19 Festool Gmbh Hand-Werkzeugmaschine mit einer Abdeckeinrichtung
EP3812089A1 (fr) 2019-10-23 2021-04-28 Black & Decker Inc. Ponceuse à manche
DE102020125135A1 (de) 2020-09-25 2022-03-31 Jöst Gmbh Schleifscheibe, Schleifvorrichtung sowie Verwendung einer Schleifscheibe
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2186600B1 (fr) * 2008-11-12 2011-11-02 Collomix Rühr-und Mischgeräte GmbH Dispositif de ponçage de surface, notamment un dispositif de ponçage de béton
US8523637B2 (en) * 2009-07-21 2013-09-03 Dustless Depot, Llc Angle grinder dust shroud with slideable access hatch
DE102012111985A1 (de) * 2012-12-07 2014-06-12 Flex-Elektrowerkzeuge Gmbh Handgehaltene Schleifmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3042738A2 (fr) 2016-07-13
DE102015100118A1 (de) 2016-07-07
EP3042738A3 (fr) 2016-10-19

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