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EP0692218A1 - Nozzle with sealing lip - Google Patents

Nozzle with sealing lip Download PDF

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Publication number
EP0692218A1
EP0692218A1 EP95108963A EP95108963A EP0692218A1 EP 0692218 A1 EP0692218 A1 EP 0692218A1 EP 95108963 A EP95108963 A EP 95108963A EP 95108963 A EP95108963 A EP 95108963A EP 0692218 A1 EP0692218 A1 EP 0692218A1
Authority
EP
European Patent Office
Prior art keywords
groove
base plate
suction
sealing strip
webs
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
EP95108963A
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German (de)
French (fr)
Other versions
EP0692218B1 (en
Inventor
Gerhard Dipl.-Ing. Stettner
Dieter Dipl.-Ing. Kalwa
Manfred Rietzke
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.)
AEG Hausgeraete GmbH
Original Assignee
AEG Hausgeraete GmbH
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
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Application filed by AEG Hausgeraete GmbH filed Critical AEG Hausgeraete GmbH
Publication of EP0692218A1 publication Critical patent/EP0692218A1/en
Application granted granted Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles

Definitions

  • the invention relates to a suction mouthpiece according to the preamble of the first claim.
  • a base plate is made of plastic, on which auxiliary elements such as a suction channel with a roller brush rotatably mounted therein, a sealing strip extending parallel to the suction channel, and wheels and the like are provided with corresponding holders.
  • auxiliary elements such as a suction channel with a roller brush rotatably mounted therein, a sealing strip extending parallel to the suction channel, and wheels and the like are provided with corresponding holders.
  • the sealing strip there is an essentially U-shaped groove in the base plate, which is open towards the surface to be machined and has retaining webs at the relevant ends of the groove flanks.
  • the invention has for its object to take measures in a suction mouthpiece according to the preamble of the first claim, by means of which the required retaining webs can be produced in a mold that is only divided parallel to the plane of the base plate.
  • the retaining webs are produced only in the area of openings in the base of the groove, the undercut edges being produced by a tool core pin which is fixedly attached to the injection mold part with which the back of the base plate is formed.
  • the groove base webs and the flank parts of the retaining webs facing the working side of the base plate are formed by the tool part forming the working side of the base plate.
  • its strip foot is largely hat-shaped in cross section, the narrower hat arch facing the groove base webs and the broadened hat brim facing the open side of the groove.
  • the transition between the bow and brim has lead-in bevels so that the hat bow can be freely inserted between the retaining webs and a stable installation position is initially achieved.
  • the hat brim is pressed between the retention bars with appropriate compression of the hat brim in the area of the retaining webs.
  • the brim then expands again and engages under the webs, while the hat arch engages between support ribs which are formed on mutually opposing groove flanks in the region of the groove base webs, which extend parallel to one another over the length of the groove.
  • the hat arch is also secured against transverse adjustment in the installed position and the sealing strip is thus held stable in the groove overall.
  • the sections of the retaining webs facing the open side of the groove can also be designed to slope down like the lead-in chamfer on the last foot in order to keep the specific surface pressure low during the pressing-in process of the sealing foot.
  • the base plate can also be integrally formed with wheel arches for wheels engaging therein, with part of the box arch being designed as a lifting flank can, which is inclined away from the wheel axis at an acute angle to the plane of the base plate and is located on the side of the wheel arch which faces the sealing strip.
  • locking lugs can also be provided in the guide slots for the wheel axles, which, like the retaining webs of the groove, engage through a core part which engages in the relevant bearing slot from the rear of the base plate and on which the injection mold forming the rear is stuck.
  • a separation of the injection mold in the plane of the base plate is required due to the axial offset of the latching lugs relative to the closed bearing slot base serving as a bearing surface for the wheel axes.
  • a suction mouthpiece for a vacuum cleaner has a base plate 1, on which auxiliary elements such as a suction channel 2 with an associated thread lifter 3, sealing strips 4, wheels 5 and support surfaces 6 or support balls 7 are provided.
  • the wheels 5 are partially immersed in adapted wheel arches 8, in which the wheels are supported and fixed at both ends with their wheel axles 9.
  • the base plate 1 is made of plastic in an injection or pressing tool, the suction channel 2, the wheel arches 8 and groove holders 10 for sealing strips 4 or slots 11 for the wheel axles being integrally formed.
  • the bearing slots 11 run perpendicular to the underside of the base plate 1 shown in the plane to the rear, in the operating case, the upper rear side 28 of the base plate 1 and are U-shaped both in a top view of the base plate 1 and in a side view according to FIG. 3, wherein the respective bearing slot 11 has an end-side bearing surface 12 for one end of the wheel axle 9 in the slot depth.
  • an upstream locking lug 13 is used, which is directed radially to the wheel axis 9 and serves as securing means for the wheel axis 9 in the assembled operating position.
  • the opposing slot flanks 14 are elastically pushed away from one another when the locking lug 13 is pressed over, in order to spring back into the adjustment path of the wheel axle 9 when the bearing axle 9 rests on the associated bearing surface 12 and to prevent an automatic release.
  • lifting flanks 15 are assigned to the wheel arches 8, which are at an acute angle 16 to the level of the base plate 1 are inclined so that there is a difference between the remaining distance between the wheel circumference and wheel arch results in increased distance.
  • a flat screwdriver 17 can be inserted into the wheel arch 8 in such a way that when tipping over the edge 18 formed between the lifting flank 15 and the plane of the base plate 1, a cutting torque is exerted on the circumference of the wheel in question by the cutting edge 19 of the screwdriver can, whose main force component is directed towards the open side of the slot guides 11 in question.
  • the wheel in question can thus be levered out of the associated bearing slots 11 against the locking action of the locking lugs 13.
  • the wheel axes 9 of which are arranged offset from one another parallel to the longitudinal direction of the base plate 1 or of the suction channel 2 and in the direction of the skin pushing, then the lifting flanks 15 are arranged such that they run out towards the center of the base plate 1. This results in simplified access during disassembly and the possibility of placing the wheels as close as possible to the relevant longitudinal side edges of the base plate 1.
  • the latching lugs 13 are each arranged axially next to the end-side bearing surface 12 and the bearing slot 11 in the demolding direction only in the area of the latching lug 13 to the rear 28 the bottom plate 1 is open. All that is needed is a mold with drivable cores.
  • the spherical formations are assigned to the wheel arches 8 arranged in the outer corner region of the rear longitudinal side edge 21 and from the Bearing slots 11 penetrated.
  • the spherical formations 7 thus form lateral bevels to protect the wheels 5 in question.
  • the grooves 10 provided for sealing strips 4 and molded into the base plate 1 extend laterally in the main sliding direction next to the support surface 6 essentially parallel to the suction channel 2.
  • the grooves 10 are essentially U-shaped in the longitudinal direction and open to the working plane of the base plate .
  • the groove base has openings 22 toward the rear side 28, so that the groove base support webs 23 remain, on which the strip foot 24 of the sealing strip 4 is supported.
  • 25 retaining web sections 26 are molded onto the opposing flanks, each of which points toward the opposite flank of the groove and serve as a counter bearing for the strip foot 24. They extend in the longitudinal direction of the groove 10 only at most over a length corresponding to the respectively assigned opening 22, so they do not overlap the groove base webs 23 in a vertical projection.
  • a thin, soft, elastic sealing lip 27 is integrally formed, the free lip edge of which extends beyond the plane defined by the edges of the suction channel 2 and in particular beyond the plane determined by the wheels 5.
  • This sealing strip 4 largely prevents the free inflow of air from the rear longitudinal edge 21, as does the increased support surface 6.
  • its strip foot 24 only needs to be placed on the open side of the groove 10 or on the retaining webs 26 and pressed into the groove 10 with elastic deformation between the retaining webs 26.
  • the retaining webs 26 then prevent the sealing strip from falling out of the groove 10 unintentionally only one end of the sealing strip 4 in question is to be levered out of the groove 10 by means of a tool, in order then to be pulled out of the remaining part of the groove 10 by hand or with pliers.
  • support ribs 30 are formed within the groove 10 from the groove base webs 23 and directed towards the open side of the groove 10 onto the opposing groove flank webs 29 which extend parallel to one another over the length of the groove 10 .
  • the support ribs 30 extend only over part of the height of the groove 10. Accordingly, the last 24 is approximately hat-shaped in cross-section, the narrower hat arch 24.1 facing the groove base webs 23 engaging between the support ribs 30, while the hat brim 24.2 directly on the Groove flanks 25 are adjacent to the retaining webs 26 after the support ribs 30 do not extend into this area.
  • the transition from the hat bow 24.1 to the hat brim 24.2 is formed on both sides as an insertion bevel 24.3.
  • the top hat 24 thus initially loosely engages between the retaining webs 26, so that mechanical demonstration and support is achieved.
  • the width of the hat bow is largely adapted to the free distance between the retaining webs 26.
  • the insertion bevels 24.3 and 26.1 slide off one another, the elastic bar base 24 in Area of the individual retaining webs is compressed accordingly transversely to the longitudinal direction of the sealing strip in order to then spring back into its illustrated installation position and to engage under the retaining webs 26 to prevent it from falling out.
  • the supporting ribs 30 prevent a pendulum movement when the sealing lip 27 is acted upon mechanically transversely to the longitudinal direction of the sealing strip during operation when the suction mouthpiece is pushed back and forth by frictional forces.
  • Fig. 1 the left groove 10 is shown without sealing strip 4 and the right groove 10 with sealing strip 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)

Abstract

The suction tool mouthpiece has a plastics base plate (1) with at least one U-shaped groove (10), parallel to the suction channel (2) for reception of a sealing rail (4). The base of the groove is provided with spaced openings (22), with the adjacent flanks (25) of the groove bent towards one another to form retaining sections (26) for the sealing rail. Pref. the elastic sealing rail has a fixing foot of similar cross-section to the reception groove, with a projecting sealing lip of reduced thickness extending beyond the plane defined by the edge of the suction channel. <IMAGE>

Description

Die Erfindung betrifft ein Saugmundstück gemäß dem Oberbegriff des ersten Anspruchs.The invention relates to a suction mouthpiece according to the preamble of the first claim.

Bei einem bekannten Saugmundstück dieser Art (EP 0 338 513 A2) ist eine Bodenplatte aus Kunststoff gefertigt, an welcher Hilfselemente wie ein Saugkanal mit darin drehbar gelagerter Walzenbürste, eine sich parallel zum Saugkanal erstreckende Dichtleiste sowie Räder und dgl. mit entsprechenden Halterungen vorgesehen sind. Für die Dichtleiste befindet sich dabei in der Bodenplatte eine im wesentlichen U-förmige Nut, die zur zu bearbeitenden Fläche hin offen ist und an den betreffenden Enden der Nutflanken Rückhaltestege aufweist. Die Herstellung von derartigen Hinterschnitten, welche ein selbsttätiges Lösen des in die Nut eingedrückten Dichtungsfußes verhindern, erfordert die Bereitstellung eines Spritzwerkzeuges mit einem im Bereich der Nut mehrfach geteilten Formkern.In a known suction mouthpiece of this type (EP 0 338 513 A2), a base plate is made of plastic, on which auxiliary elements such as a suction channel with a roller brush rotatably mounted therein, a sealing strip extending parallel to the suction channel, and wheels and the like are provided with corresponding holders. For the sealing strip there is an essentially U-shaped groove in the base plate, which is open towards the surface to be machined and has retaining webs at the relevant ends of the groove flanks. The production of such undercuts, which prevent the sealing foot pressed into the groove from automatically loosening, requires the provision of an injection mold with a mold core which is divided several times in the region of the groove.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Saugmundstück gemäß dem Oberbegriff des ersten Anspruchs Maßnahmen zu treffen, durch welche die erforderlichen Rückhaltestege in einem lediglich parallel zur Ebene der Bodenplatte geteilten Formwerkzeug hergestellt werden können.The invention has for its object to take measures in a suction mouthpiece according to the preamble of the first claim, by means of which the required retaining webs can be produced in a mold that is only divided parallel to the plane of the base plate.

Die Lösung dieser Aufgabe erfolgt gemäß der Erfindung durch die kennzeichnenden Merkmale des ersten Anspruchs.This object is achieved according to the invention by the characterizing features of the first claim.

Bei einer Ausgestaltung eines Saugmundstück gemäß der Erfindung werden die Rückhaltestege lediglich im Bereich von Durchbrüchen im Nutgrund erzeugt, wobei die Hinterschnittkanten durch einen Werkzeugkernstift erzeugt werden, der fest an dem Spritzwerkzeugteil festgesetzt ist, mit welchem die Rückseite der Bodenplatte geformt wird. Die Nutgrundstege und die zur Arbeitsseite der Bodenplatte weisenden Flankenteile der Rückhaltestege werden durch den die Arbeitsseite der Bodenplatte formenden Werkzeugteil ausgebildet. Um das Einsetzen der Dichtleiste in die Nut zu vereinfachen, ist ihr Leistenfuß im Querschnitt weitgehend hutförmig ausgebildet, wobei der schmalere Hutbogen den Nutgrundstegen und die verbreiterte Hutkrempe der offenen Seite der Nut zugewandt ist. Der Übergang zwischen Bogen und Krempe weist Einführschrägen auf, so daß der Hutbogen ungehindert zwischen die Rückhaltestege eingeführt werden kann und zunächst eine stabile Montagelage erreicht ist. Durch Niederdrücken des Leistenfußes wird unter entsprechender Komprimierung der Hutkrempe im Bereich der Rückhaltestege die Hutkrempe zwischen den Rückhaltestegen hindurchgepreßt. Die Krempe dehnt sich anschließend wieder aus und untergreift die Stege, während der Hutbogen zwischen Stützrippen greift, die an sich gegenüberstehende, parallel zueinander über die Länge der Nut reichende Nutflanken im Bereich der Nutgrundstege angeformt sind. Dadurch ist auch der Hutbogen in der eingebauten Lage gegen Querverstellen gesichert und damit die Dichtleiste insgesamt stabil in der Nut gehalten. Dabei können auch die der offenen Seite der Nut zugewandten Abschnitte der Rückhaltestege schräg abfallend wie die Einführschräge am Leistenfuß ausgebildet werden, um die spezifische Flächenpressung im Eindrückvorgang des Dichtungsfußes niedrig zu halten. Im Übrigen kann die Bodenplatte gleichzeitig auch mit Radkästen für darin eingreifende Räder einstückig ausgeformt werden, wobei ein Teil des Kastenbogens jeweils als Aushebeflanke ausgebildet sein kann, die unter einem spitzen Winkel zur Ebene der Bodenplatte von der Radachse weggeneigt ist und sich auf der Seite des Radkastens befindet, die der Dichtleiste zugewandt ist. Dabei können auch hierbei für die Radachsen Rastnasen in Führungsschlitzen vorgesehen sein, die gleicherweise wie die Rückhaltestege der Nut durch einen von der Rückseite der Bodenplatte in den betreffenden Lagerschlitz eingreifenden, an dem die Rückseite ausformenden Spritzwerkzeug festsitzenden Kernteil dargestellt werden. Auch hierbei ist durch axialen Versatz der Rastnasen gegenüber dem geschlossenen, als Lagerfläche für die Radachsen dienenden Lagerschlitzgrund lediglich eine Trennung des Spritzwerkzeugs in der Ebene der Bodenplatte erforderlich.In one embodiment of a suction mouthpiece according to the invention, the retaining webs are produced only in the area of openings in the base of the groove, the undercut edges being produced by a tool core pin which is fixedly attached to the injection mold part with which the back of the base plate is formed. The groove base webs and the flank parts of the retaining webs facing the working side of the base plate are formed by the tool part forming the working side of the base plate. In order to simplify the insertion of the sealing strip into the groove, its strip foot is largely hat-shaped in cross section, the narrower hat arch facing the groove base webs and the broadened hat brim facing the open side of the groove. The transition between the bow and brim has lead-in bevels so that the hat bow can be freely inserted between the retaining webs and a stable installation position is initially achieved. By pressing down the last of the last, the hat brim is pressed between the retention bars with appropriate compression of the hat brim in the area of the retaining webs. The brim then expands again and engages under the webs, while the hat arch engages between support ribs which are formed on mutually opposing groove flanks in the region of the groove base webs, which extend parallel to one another over the length of the groove. As a result, the hat arch is also secured against transverse adjustment in the installed position and the sealing strip is thus held stable in the groove overall. The sections of the retaining webs facing the open side of the groove can also be designed to slope down like the lead-in chamfer on the last foot in order to keep the specific surface pressure low during the pressing-in process of the sealing foot. Incidentally, the base plate can also be integrally formed with wheel arches for wheels engaging therein, with part of the box arch being designed as a lifting flank can, which is inclined away from the wheel axis at an acute angle to the plane of the base plate and is located on the side of the wheel arch which faces the sealing strip. In this case, locking lugs can also be provided in the guide slots for the wheel axles, which, like the retaining webs of the groove, engage through a core part which engages in the relevant bearing slot from the rear of the base plate and on which the injection mold forming the rear is stuck. Here too, only a separation of the injection mold in the plane of the base plate is required due to the axial offset of the latching lugs relative to the closed bearing slot base serving as a bearing surface for the wheel axes.

Die Erfindung ist nachfolgend anhand der Skizzen eines Ausführungsbeispiels näher erläutert.The invention is explained in more detail below with the aid of the sketches of an exemplary embodiment.

Es zeigen:

  • Fig. 1 eine Draufsicht auf die der abzusaugenden Fläche zugewandte Unterseite der Bodenplatte eines Saugmundstücks,
  • Fig. 2 einen Teil-Seitenschnitt durch die Anordnung nach Fig. 1 entlang der Linie A-A im Bereich eines in die Bodenplatte integrierten Radkastens,
  • Fig. 3 eine Seitenansicht auf die schmale Seitenkante der Bodenplatte gemäß Fig. 1,
  • Fig. 4 einen Längsschnitt durch die eine Dichtleiste aufnehmende Nut in der Bodenplatte und
  • Fig. 5 einen Querschnitt durch die Anordnung nach Fig. 4.
Show it:
  • 1 is a plan view of the underside of the bottom plate of a suction mouthpiece facing the surface to be extracted,
  • 2 shows a partial side section through the arrangement according to FIG. 1 along the line AA in the region of a wheel housing integrated in the base plate,
  • 3 shows a side view of the narrow side edge of the base plate according to FIG. 1,
  • Fig. 4 shows a longitudinal section through the groove receiving a sealing strip in the base plate and
  • 5 shows a cross section through the arrangement according to FIG. 4.

Ein Saugmundstück für einen Staubsauger weist eine Bodenplatte 1 auf, an welcher Hilfselemente wie ein Saugkanal 2 mit zugeordnetem Fadenheber 3, Dichtleisten 4, Rädern 5 und Stützflächen 6 bzw. Stützballen 7 vorgesehen sind. Die Räder 5 tauchen dabei teilweise in angepaßte Radkästen 8 ein, in welchen die Rädern mit ihren Radachsen 9 beidendig abgestützt und festgesetzt sind. Die Bodenplatte 1 ist dabei aus Kunststoff in einem Spritz- oder Preßwerkzeug hergestellt, wobei der Saugkanal 2, die Radkästen 8 und Nut-Halterungen 10 für Dichtleisten 4 oder Schlitze 11 für die Radachsen einstückig angeformt sind.A suction mouthpiece for a vacuum cleaner has a base plate 1, on which auxiliary elements such as a suction channel 2 with an associated thread lifter 3, sealing strips 4, wheels 5 and support surfaces 6 or support balls 7 are provided. The wheels 5 are partially immersed in adapted wheel arches 8, in which the wheels are supported and fixed at both ends with their wheel axles 9. The base plate 1 is made of plastic in an injection or pressing tool, the suction channel 2, the wheel arches 8 and groove holders 10 for sealing strips 4 or slots 11 for the wheel axles being integrally formed.

Die Lagerschlitze 11 verlaufen senkrecht zur gezeigten Unterseite der Bodenplatte 1 in die Ebene hinein zur rückwärtigen, im Betriebsfall oben liegenden Rückseite 28 der Bodenplatte 1 und sind U-förmig sowohl bei Draufsicht auf die Bodenplatte 1 wie auch in der Seitenansicht gemäß Fig. 3 ausgebildet, wobei der jeweilige Lagerschlitz 11 in der Schlitztiefe eine endseitige Lagerfläche 12 für ein Ende der Radachse 9 aufweist. Zur Sicherung der in den jeweiligen Lagerschlitz 11 eingesetzten Lagerachse 9 dient eine vorgelagerte Rastnase 13, die radial zur Radachse 9 gerichtet ist und als Sicherungsmittel für die Radachse 9 in der montierten Betriebslage dient. Beim Einsetzen der Räder 5 werden die sich gegenüberstehenden Schlitzflanken 14 beim Überdrücken der Rastnase 13 elastisch voneinander weggedrückt, um beim Aufliegen der Lagerachse 9 auf der zugeordneten Lagerfläche 12 in den Verstellweg der Radachse 9 zurückzufedern und ein selbsttätiges Lösen zu verhindern.The bearing slots 11 run perpendicular to the underside of the base plate 1 shown in the plane to the rear, in the operating case, the upper rear side 28 of the base plate 1 and are U-shaped both in a top view of the base plate 1 and in a side view according to FIG. 3, wherein the respective bearing slot 11 has an end-side bearing surface 12 for one end of the wheel axle 9 in the slot depth. To secure the bearing axis 9 inserted into the respective bearing slot 11, an upstream locking lug 13 is used, which is directed radially to the wheel axis 9 and serves as securing means for the wheel axis 9 in the assembled operating position. When the wheels 5 are inserted, the opposing slot flanks 14 are elastically pushed away from one another when the locking lug 13 is pressed over, in order to spring back into the adjustment path of the wheel axle 9 when the bearing axle 9 rests on the associated bearing surface 12 and to prevent an automatic release.

Um eine Demontage der Räder 5 in einfacher Weise ausführen zu können, wenn ein Reinigen der Radkästen 8 bzw. der Räder 5 auch durch Laien möglich sein soll, sind den Radkästen 8 Aushebeflanken 15 zugeordnet, die unter einem spitzen Winkel 16 zur Ebene der Bodenplatte 1 so geneigt sind, daß sich ein gegenüber dem übrigen Abstand zwischen Radumfang und Radkasten vergrößerter Abstand ergibt. Über diese Flanke kann beispielsweise ein Flachschraubendreher 17 in den Radkasten 8 so eingeführt werden, daß beim Kippen über die zwischen der Aushebeflanke 15 und der Ebene der Bodenplatte 1 gebildeten Kante 18 durch die Schneide 19 des Schraubendrehers ein Aushebemoment auf den Umfang des betreffenden Rades ausgeübt werden kann, dessen Hauptkraftkomponente zur offenen Seite der betreffenden Schlitzführungen 11 hin gerichtet ist. Das betreffende Rad läßt sich somit gegen die Sperrwirkung der Rastnasen 13 wieder aus den zugehörigen Lagerschlitzen 11 aushebeln. Werden mehrere Räder 5 vorgesehen, deren Radachsen 9 parallel zur Längsrichtung der Bodenplatte 1 bzw. des Saugkanals 2 und in der Hautpschieberichtung mit Abstand voneinander versetzt angeordnet sind, dann werden die Aushebeflanken 15 so angeordnet, daß sie jeweils zur Mitte der Bodenplatte 1 hin auslaufen. Es ergibt sich dadurch ein vereinfachter Zugriff bei der Demontage sowie die Möglichkeit, die Räder möglichst nahe an die betreffenden Längsseitenränder der Bodenplatte 1 heranzusetzen. Um die mit den Rastnasen 13 versehenen Lagerschlitze 11 in einem lediglich in Längsrichtung der Lagerschlitze 11 ziehbarem Formwerkzeug ausbilden zu können, sind die Rastnasen 13 jeweils axial neben der endseitigen Lagerfläche 12 angeordnet und der Lagerschlitz 11 in Entformungsrichtung lediglich im Bereich der Rastnase 13 zur Rückseite 28 der Bodenplatte 1 hin offen ausgebildet. Es genügt somit ein Formwerkzeug mit überfahrbaren Kernen.In order to be able to carry out a dismantling of the wheels 5 in a simple manner if cleaning of the wheel arches 8 or the wheels 5 should also be possible by laymen, lifting flanks 15 are assigned to the wheel arches 8, which are at an acute angle 16 to the level of the base plate 1 are inclined so that there is a difference between the remaining distance between the wheel circumference and wheel arch results in increased distance. Via this flank, for example, a flat screwdriver 17 can be inserted into the wheel arch 8 in such a way that when tipping over the edge 18 formed between the lifting flank 15 and the plane of the base plate 1, a cutting torque is exerted on the circumference of the wheel in question by the cutting edge 19 of the screwdriver can, whose main force component is directed towards the open side of the slot guides 11 in question. The wheel in question can thus be levered out of the associated bearing slots 11 against the locking action of the locking lugs 13. If several wheels 5 are provided, the wheel axes 9 of which are arranged offset from one another parallel to the longitudinal direction of the base plate 1 or of the suction channel 2 and in the direction of the skin pushing, then the lifting flanks 15 are arranged such that they run out towards the center of the base plate 1. This results in simplified access during disassembly and the possibility of placing the wheels as close as possible to the relevant longitudinal side edges of the base plate 1. In order to be able to form the bearing slots 11 provided with the latching lugs 13 in a mold which can only be drawn in the longitudinal direction of the bearing slots 11, the latching lugs 13 are each arranged axially next to the end-side bearing surface 12 and the bearing slot 11 in the demolding direction only in the area of the latching lug 13 to the rear 28 the bottom plate 1 is open. All that is needed is a mold with drivable cores.

Während die Stützfläche 6 in Hauptschieberichtung im mittleren Bereich hinter einer dem Absaugkanal 2 zugeordneten Absaugöffnung 20 liegt und sich bis an den betreffenden rückwärtigen Seitenrand 21 der Bodenplatte 1 erstreckt, sind die balligen Ausformungen den der rückwärtigen Längsseitenkante 21 im äußeren Eckbereich angeordneten Radkästen 8 zugeordnet und von den Lagerschlitzen 11 durchsetzt. Die balligen Ausformungen 7 bilden so seitliche Auflaufschrägen zum Schutz der betreffenden Räder 5.While the support surface 6 lies in the central sliding direction in the central region behind a suction opening 20 assigned to the suction channel 2 and extends to the relevant rear side edge 21 of the base plate 1, the spherical formations are assigned to the wheel arches 8 arranged in the outer corner region of the rear longitudinal side edge 21 and from the Bearing slots 11 penetrated. The spherical formations 7 thus form lateral bevels to protect the wheels 5 in question.

Die für Dichtleisten 4 vorgesehenen, in die Bodenplatte 1 eingeformten Nuten 10 erstrecken sich in Hauptschieberichtung seitlich neben der Stützfläche 6 im wesentlichen parallel zum Saugkanal 2. Die Nuten 10 sind dabei in Längsrichtung im wesentlichen U-förmig ausgebildet und zu der Arbeitsebene der Bodenplatte hin offen. Der Nutgrund weist dabei zur Rückseite 28 hin Durchbrüche 22 auf, so daß Nutgrund-Stützstege 23 stehen bleiben, auf welchen sich der Leistenfuß 24 der Dichtleiste 4 abstützt. Zusätzlich sind an die sich gegenüberstehenden Flanken 25 Rückhaltesteg-Abschnitte 26 angeformt, die jeweils zur gegenüberliegenden Nutflanke hin weisen und als Gegenlager für den Leistenfuß 24 dienen. Sie erstrecken sich in Längsrichtung der Nut 10 nur höchstens über eine dem jeweils zugeordneten Durchbruch 22 entsprechende Länge, greifen in senkrechter Projektion also nicht auf die Nutgrundstege 23 über. An den dem Querschnitt der Nut im wesentlichen angepaßten elastischen, verdickten Leistenfuß 24 ist eine demgegenüber dünne weichelastische Dichtlippe 27 einstückig angeformt, deren freie Lippenkante bis über die durch die Ränder des Saugkanals 2 bestimmte Ebene und insbesondere über die durch die Räder 5 bestimmte Ebene hinausragt. Diese Dichtleiste 4 verhindert so weitgehend den freien Zustrom von Luft von der rückseitigen Längskante 21 her, wie das auch die erhöhte Stützfläche 6 bewirkt. Zum Einsetzen der Dichtleiste 4 braucht ihr Leistenfuß 24 lediglich auf die offene Seite der Nut 10 bzw. auf die Rückhaltestege 26 aufgelegt und unter elastischer Verformung zwischen den Rückhaltestegen 26 hindurch in die Nut 10 eingedrückt zu werden. Die Rückhaltestege 26 verhindern dann ein unbeabsichtigtes Herausfallen der Dichtleiste aus der Nut 10. Zur Demontage braucht dabei lediglich ein Ende der betreffenden Dichtleiste 4 mittels eines Werkzeugs aus der Nut 10 ausgehebelt zu werden, um danach von Hand oder mittels einer Zange aus dem übrigen Teil der Nut 10 herausgezogen zu werden.The grooves 10 provided for sealing strips 4 and molded into the base plate 1 extend laterally in the main sliding direction next to the support surface 6 essentially parallel to the suction channel 2. The grooves 10 are essentially U-shaped in the longitudinal direction and open to the working plane of the base plate . The groove base has openings 22 toward the rear side 28, so that the groove base support webs 23 remain, on which the strip foot 24 of the sealing strip 4 is supported. In addition, 25 retaining web sections 26 are molded onto the opposing flanks, each of which points toward the opposite flank of the groove and serve as a counter bearing for the strip foot 24. They extend in the longitudinal direction of the groove 10 only at most over a length corresponding to the respectively assigned opening 22, so they do not overlap the groove base webs 23 in a vertical projection. On the cross-section of the groove substantially adapted to the elastic, thickened last foot 24, a thin, soft, elastic sealing lip 27 is integrally formed, the free lip edge of which extends beyond the plane defined by the edges of the suction channel 2 and in particular beyond the plane determined by the wheels 5. This sealing strip 4 largely prevents the free inflow of air from the rear longitudinal edge 21, as does the increased support surface 6. To insert the sealing strip 4, its strip foot 24 only needs to be placed on the open side of the groove 10 or on the retaining webs 26 and pressed into the groove 10 with elastic deformation between the retaining webs 26. The retaining webs 26 then prevent the sealing strip from falling out of the groove 10 unintentionally only one end of the sealing strip 4 in question is to be levered out of the groove 10 by means of a tool, in order then to be pulled out of the remaining part of the groove 10 by hand or with pliers.

Bei diesem Aufbau ist somit neben einer unkomplizierten Herstellmöglichkeit für die Bodenplatte 1 auch eine einfache Montage- und Demontagemöglichkeit für die Räder 5 wie für die Dichtleiste 4 erreicht.With this construction, in addition to an uncomplicated manufacturing possibility for the base plate 1, a simple assembly and disassembly option for the wheels 5 as well as for the sealing strip 4 is thus achieved.

Um im übrigen der Dichtleiste 4 in einfacher Weise ausführen zu können, sind innerhalb der Nut 10 von den Nutgrundstegen 23 ausgehende und zur offenen Seite der Nut 10 gerichtete Stützrippen 30 an die sich gegenüberstehenden, parallel zueinander über die Länge der Nut 10 reichenden Nutflankenstege 29 angeformt. Die Stützrippen 30 erstrecken sich dabei nur über einen Teil der Höhe der Nut 10. Dementsprechend ist der Leistenfuß 24 im Querschnitt annähernd hutförmig ausgebildet, wobei der schmalere, den Nutgrundstegen 23 zugewandte Hutbogen 24.1 zwischen die Stützrippen 30 greift, während die Hutkrempe 24.2 unmittelbar an den Nutflanken 25 benachbart zu den Rückhaltestegen 26 anliegt, nachdem sich in diesen Bereich die Stützrippen 30 nicht erstrecken. Der Übergang vom Hutbogen 24.1 zur Hutkrempe 24.2 ist beidseitig als Einführschräge 24.3 ausgebildet. In gleicher Weise ist es zweckmäßig, auch die zur offenen Seite der Nut hinweisenden Teile der Rückhaltestege 26 mit Einführschrägen 26.1 zu versehen. Zum Einsetzen der Dichtungsleiste 4 greift somit der Hutbogen 24 zunächst lose zwischen die Rückhaltestege 26 ein, so daß eine mechanische Vorführung und Abstützung erreicht ist. Die Breite des Hutbogens ist dabei dem freien Abstand zwischen den Rückhaltestegen 26 weitgehend angepaßt. Durch Druck auf die Fußleiste 24 von der offenen Seite der Nut 10 aus gleiten die Einführschrägen 24.3 und 26.1 aufeinander ab, wobei der elastische Leistenfuß 24 im Bereich der einzelnen Rückhaltestege quer zur Längsrichtung der Dichtleiste entsprechend komprimiert wird, um anschließen in seine dargestellte Einbaulage zurückzufedern und die Rückhaltestege 26 zur Sicherung gegen Herausfallen zu untergreifen. Die Stützrippen 30 verhindern dann eine Pendelbewegung, wenn die Dichtlippe 27 in Betrieb beim Hin- und Herschieben des Saugmundstücks mechanisch quer zur Längsrichtung der Dichtleiste durch Reibungskräfte beaufschlagt wird. In Fig. 1 ist im übrigen die linke Nut 10 ohne Dichtleiste 4 und die rechte Nut 10 mit Dichtleiste 4 dargestellt.In order to be able to execute the sealing strip 4 in a simple manner, support ribs 30 are formed within the groove 10 from the groove base webs 23 and directed towards the open side of the groove 10 onto the opposing groove flank webs 29 which extend parallel to one another over the length of the groove 10 . The support ribs 30 extend only over part of the height of the groove 10. Accordingly, the last 24 is approximately hat-shaped in cross-section, the narrower hat arch 24.1 facing the groove base webs 23 engaging between the support ribs 30, while the hat brim 24.2 directly on the Groove flanks 25 are adjacent to the retaining webs 26 after the support ribs 30 do not extend into this area. The transition from the hat bow 24.1 to the hat brim 24.2 is formed on both sides as an insertion bevel 24.3. In the same way, it is also expedient to provide the parts of the retaining webs 26 pointing towards the open side of the groove with insertion bevels 26.1. To insert the sealing strip 4, the top hat 24 thus initially loosely engages between the retaining webs 26, so that mechanical demonstration and support is achieved. The width of the hat bow is largely adapted to the free distance between the retaining webs 26. By pressing on the skirting board 24 from the open side of the groove 10, the insertion bevels 24.3 and 26.1 slide off one another, the elastic bar base 24 in Area of the individual retaining webs is compressed accordingly transversely to the longitudinal direction of the sealing strip in order to then spring back into its illustrated installation position and to engage under the retaining webs 26 to prevent it from falling out. The supporting ribs 30 prevent a pendulum movement when the sealing lip 27 is acted upon mechanically transversely to the longitudinal direction of the sealing strip during operation when the suction mouthpiece is pushed back and forth by frictional forces. In Fig. 1, the left groove 10 is shown without sealing strip 4 and the right groove 10 with sealing strip 4.

Claims (11)

Saugmundstück für Staubsauger mit einer aus Kunststoff gefertigten Bodenplatte, an welcher Hilfselemente, wie Fadenhebe, Saugkanal, Dichtleiste, Räder, Stützplatte vorgesehen sind und mit einer in die Bodenplatte eingeformten, im Querschnitt im wesentlichen U-förmigen, zumindest annähernd in Längsrichtung des Saugkanals verlaufenden, zur Ebene der Bodenplatte hin offenen und mit Rückhaltestegen versehenen Nut für den verdickten Leistenfuß der Dichtleiste, dadurch gekennzeichnet, daß der Nutgrung Durchbrüche (22) aufweist und daß in senkrechter Projektion lediglich im Bereich der Durchbrüche (22) an wenigstens einer Nutflanke (25) ein zur gegenüberstehenden Nutflanke (25) gerichteter Rückhaltesteg-Abschnitt (26) vorgesehen ist.Suction mouthpiece for vacuum cleaners with a base plate made of plastic, on which auxiliary elements such as thread lifting, suction channel, sealing strip, wheels, support plate are provided and with an essentially U-shaped cross-section, at least approximately in the longitudinal direction of the suction channel, molded into the base plate. groove open to the level of the base plate and provided with retaining webs for the thickened last foot of the sealing strip, characterized in that the groove has openings (22) and that in a vertical projection only in the area of the openings (22) on at least one groove flank (25) Retaining web section (26) facing the opposite groove flank (25) is provided. Saugmundstück nach Anspruch 1, dadurch gekennzeichnet, daß in die Nut (10) die Dichtleiste (4) eingesetzt ist, deren dem Nutquerschnitt weitgehend angepaßter elastischer, verdickter Leistenfuß (24) zwischen die Nutgrundstege (23) und die Rückhaltestege (26) eingesetzt ist, während eine daran vorgesehene, demgegenüber dünne weichelastische Dichtlippe (27) über die durch die Ränder des Saugkanals (2) bestimmte Ebene ragt.Suction nozzle according to claim 1, characterized in that the sealing strip (4) is inserted into the groove (10), the elastic, thickened strip foot (24) of which is largely adapted to the groove cross section is inserted between the groove base webs (23) and the retaining webs (26), while a thin, elastic sealing lip (27) provided thereon projects beyond the plane defined by the edges of the suction channel (2). Saugmundstück nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß innerhalb der Nut (10) von den Nutgrundstegen (23) ausgehende, zur offenen Seite der Nut (10) gerichtete Stützrippen (30) an die sich gegenüberstehenden, parallel zueinander über die Länge der Nut (10) reichenden Nutflanken (29) angeformt sind und daß der Leistenfuß (24) der Dichtleiste (4) im Querschnitt annähernd hutförmig ausgebildet ist, wobei der schmalere Hutbogen (24.1) zwischen die Stützrippen (30) greift und die Hutkrempe (24.2) unmittelbar an den Nutflanken (25) benachbart zu den Rückhaltestegen (26) anliegt.Suction mouthpiece according to claim 1 or 2, characterized in that within the groove (10) from the groove base webs (23), which are directed towards the open side of the groove (10), support ribs (30) opposing groove flanks (29) extending parallel to one another over the length of the groove (10) are formed and that the strip foot (24) of the sealing strip (4) is approximately hat-shaped in cross section, the narrower hat arch (24.1) between the support ribs (30 ) engages and the hat brim (24.2) rests directly on the groove flanks (25) adjacent to the retaining webs (26). Saugmundstück nach Anspruch 1 oder einem der folgenden, dadurch gekennzeichnet, daß die Rückhaltestege (26) zur offenen Seite der Nut (10) hin abfallende Einführschrägen (26.1) aufweisen.Suction mouthpiece according to claim 1 or one of the following, characterized in that the retaining webs (26) have insertion bevels (26.1) which drop away towards the open side of the groove (10). Saugmundstück nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß der Leistenfuß (24) am übergang vom Hutbogen (24.1) zur Hutkrempe (24.2) Einführschrägen (24.3) aufweist.Suction mouthpiece according to claim 3 or 4, characterized in that the last foot (24) has insertion bevels (24.3) at the transition from the hat arch (24.1) to the hat brim (24.2). Saugmundstück, insbesondere nach Anspruch 1 oder einem der folgenden, dadurch gekennzeichnet, daß in die Bodenplatte (1) ein Radkasten (8) eingeformt ist, der eine von der Ebene der Bodenplatte (1) ausgehende Aushebeflanke (15) aufweist, die unter einem spitzen Winkel (16) zur Ebene der Bodenplatte (1) von der Radachse (9) weggeneigt ist.Suction mouthpiece, in particular according to claim 1 or one of the following, characterized in that a wheel housing (8) is formed in the base plate (1), which has a lifting flank (15) which starts from the plane of the base plate (1) and which tips under one Angle (16) to the plane of the base plate (1) is inclined away from the wheel axis (9). Saugmundstück nach Anspruch 6, dadurch gekennzeichnet, daß mehrere Räder (5) vorgesehen sind, deren Radachsen (9) parallel zur Längsrichtung der Bodenplatte (1) bzw. des Saugkanals (2) und mit Abstand voneinander versetzt angeordnet sind und daß die Aushebeflanken (15) jeweils auf der zur Dichtleiste (4) gewandten Seite des jeweiligen Radkastens (8) vorgesehen sind.Suction nozzle according to claim 6, characterized in that a plurality of wheels (5) are provided, the wheel axes (9) of which are arranged parallel to the longitudinal direction of the base plate (1) or of the suction channel (2) and offset from one another and in that the lifting flanks (15 ) are provided on the side of the respective wheel housing (8) facing the sealing strip (4). Saugmundstück nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß die Radachse (9) beidendig in angepaßte, senkrecht zur und von der Ebene der Bodenplatte (1) ausgehende endseitig eine Lagerfläche (12) aufweisende Lagerschlitze (11) eingesetzt sind, die radials zur Radachse (9) gerichtete, überdrückbare Rastnasen (13) als Sicherungsmittel für die Radachse (9) in der Betriebslage aufweisen.Suction nozzle according to claim 6 or 7, characterized in that the wheel axis (9) in both ends Adapted bearing slots (11) are inserted at the end, perpendicular to and from the plane of the base plate (1), which have a bearing surface (12) and which can be pushed over radially to the wheel axis (9) and which can be pushed over as locking means (13) as securing means for the wheel axis (9) have in the operating situation. Saugmundstück nach Anspruch 8, dadurch gekennzeichnet, daß Rastnasen (13) nur auf der zur Aushebeflanke (15) benachbarten Schlitzflanke (14) vorgesehen sind.Suction nozzle according to claim 8, characterized in that locking lugs (13) are provided only on the slot flank (14) adjacent to the lifting flank (15). Saugmundstück nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß die Rastnasen (13) jeweils axial neben der endseitigen Lagerfläche (12) angeordnet und der Lagerschlitz (11) im Bereich der Rastnase (13) zur Rückseite (28) der Bodenplatte (1) hin offen ist.Suction nozzle according to claim 8 or 9, characterized in that the latching lugs (13) are each arranged axially next to the end-side bearing surface (12) and the bearing slot (11) in the region of the latching lug (13) towards the rear (28) of the base plate (1) is open. Saugmundstück nach Anspruch 1 oder deinem der folgenden, dadurch gekennzeichnet, daß die Bodenplatte (1) im Bereich von Lagerschlitzen (11) ballige Ausformungen (7) aufweist, die von den Lagerschlitzen (11) durchsetzt sind.Suction nozzle according to claim 1 or yours, characterized in that the base plate (1) in the area of bearing slots (11) has spherical formations (7) which are penetrated by the bearing slots (11).
EP95108963A 1994-07-14 1995-06-10 Nozzle with sealing lip Expired - Lifetime EP0692218B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4424809 1994-07-14
DE4424809A DE4424809A1 (en) 1994-07-14 1994-07-14 Suction mouthpiece with sealing strip

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EP0692218A1 true EP0692218A1 (en) 1996-01-17
EP0692218B1 EP0692218B1 (en) 1998-03-25

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620437A1 (en) * 1996-05-21 1997-11-27 Bosch Siemens Hausgeraete Bearing device for vacuum cleaner wheel
CN101862158A (en) * 2009-04-14 2010-10-20 戴森技术有限公司 cleaner head

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
DE19706945A1 (en) * 1997-02-21 1998-08-27 Wessel Werk Gmbh Floor nozzle for vacuum cleaners
DE19730709C2 (en) * 1997-07-17 2000-12-07 Bsh Bosch Siemens Hausgeraete Vacuum cleaner mouthpiece
WO1999044486A1 (en) * 1998-03-03 1999-09-10 BSH Bosch und Siemens Hausgeräte GmbH A vacuum cleaner head
DE19900968C1 (en) * 1999-01-13 2000-01-13 Wessel Werk Gmbh Slide sole for vacuum cleaner nozzle

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DE3445526A1 (en) * 1984-12-13 1986-06-19 Hans 5226 Reichshof Wessel VACUUM CLEANER NOZZLE
DE3801757A1 (en) * 1988-01-22 1989-07-27 Wessel Werk Gmbh VACUUM CLEANER NOZZLE
EP0338513A2 (en) 1988-04-20 1989-10-25 Hitachi, Ltd. Suction nozzle with rotary brush for vacuum cleaner
DE8812278U1 (en) * 1988-09-28 1990-01-25 Siemens AG, 1000 Berlin und 8000 München Vacuum cleaner mouthpiece
EP0382598A1 (en) * 1989-02-09 1990-08-16 ETABLISSEMENTS GEORGES OLIVIER Société Anonyme dite: Suction nozzle for carpets or for hard dry and damp floors

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AT256760B (en) * 1963-09-02 1967-09-11 Gerhard Dipl Ing Heyek Vacuum cleaner cap articulated to be attached to a vacuum cleaner housing

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DE3445526A1 (en) * 1984-12-13 1986-06-19 Hans 5226 Reichshof Wessel VACUUM CLEANER NOZZLE
DE3801757A1 (en) * 1988-01-22 1989-07-27 Wessel Werk Gmbh VACUUM CLEANER NOZZLE
EP0338513A2 (en) 1988-04-20 1989-10-25 Hitachi, Ltd. Suction nozzle with rotary brush for vacuum cleaner
DE8812278U1 (en) * 1988-09-28 1990-01-25 Siemens AG, 1000 Berlin und 8000 München Vacuum cleaner mouthpiece
EP0382598A1 (en) * 1989-02-09 1990-08-16 ETABLISSEMENTS GEORGES OLIVIER Société Anonyme dite: Suction nozzle for carpets or for hard dry and damp floors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620437A1 (en) * 1996-05-21 1997-11-27 Bosch Siemens Hausgeraete Bearing device for vacuum cleaner wheel
CN101862158A (en) * 2009-04-14 2010-10-20 戴森技术有限公司 cleaner head
CN101862158B (en) * 2009-04-14 2012-10-10 戴森技术有限公司 A cleaner head

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DE4424809A1 (en) 1996-01-18
DE59501686D1 (en) 1998-04-30
EP0692218B1 (en) 1998-03-25

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