EP2497853B1 - Plastic laundry container for a washing machine having a screw connection for fixing the plastic container cap to a plastic laundry container casing - Google Patents

Plastic laundry container for a washing machine having a screw connection for fixing the plastic container cap to a plastic laundry container casing Download PDF

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Publication number
EP2497853B1
EP2497853B1 EP20110401038 EP11401038A EP2497853B1 EP 2497853 B1 EP2497853 B1 EP 2497853B1 EP 20110401038 EP20110401038 EP 20110401038 EP 11401038 A EP11401038 A EP 11401038A EP 2497853 B1 EP2497853 B1 EP 2497853B1
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EP
European Patent Office
Prior art keywords
screw
plastics
container
suds container
height
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EP20110401038
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German (de)
French (fr)
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EP2497853A1 (en
Inventor
Benedikt Fechtel
Andreas Kratzsch
Elena Pieri
Christian Schrewe
Riccardo Scorcelletti
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Miele und Cie KG
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Miele und Cie KG
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Priority to ES11401038T priority Critical patent/ES2401596T3/en
Priority to EP20110401038 priority patent/EP2497853B1/en
Publication of EP2497853A1 publication Critical patent/EP2497853A1/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/261—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements
    • D06F37/262—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements made of plastic material, e.g. by injection moulding
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/264—Tubs provided with reinforcing structures, e.g. ribs, inserts, braces

Definitions

  • the invention relates to a plastic container for a washing machine comprising a surrounding the drum cylindrical shaped plastic container, which consists of a molded container shell, on the front side of a plastic molded Laugen userkappe is attached, which for sealing connection by means of a tongue and groove connection and Screw is fixed, wherein the single screw connection consists of a self-tapping screw which is screwed into a screwed on the end wall of the container shell screw for producing a frictional connection between the container shell and the tub container cap, wherein on the screw a dome is formed, in a The conical seat molded into the tub cap engages in the screwed state for producing a form-locking connection.
  • plastic liquor containers which consist of a molded container casing, as well as of a molded lye container cap
  • these have, on the one hand, a tongue and groove connection for the sealing connection, as well as screw connections which produce the frictional connection between the parts.
  • a plastic tub is, for example, from EP 0 835 729 A1 known.
  • the front cap is usually releasably connected to the rear container shell by self-tapping plastic screws.
  • the seal against the liquid media via a round seal in the form of a tongue / groove arrangement between the container shell and the tub container cap.
  • This connection arrangement all forces of the generally attached at the front additional masses are directed. These are essentially the inertial forces that occur due to the rotating masses.
  • the force-locking screw connections must in this case be dimensioned sufficiently safe, otherwise the assembled plastic tub could have leaks, which can lead to a total loss of the washing unit.
  • a shell part comprises a dome formed on the screw, which engages in a conical seat on the other switching part.
  • the dome is slightly widened and squeezed into the conical seat.
  • a positive connection is additionally provided via a conical seat.
  • This positive connection consists in this case of an integrally formed on the container shell dome, which engages in the assembled state of the two parts in a molded-on the Laugen hereerkappe cone.
  • This so-called conical seat is inaccurate due to different material shrinkage, so that it has an irregular contact pattern. If distributed on the circumference, for example, twenty screw, so it could be the case that in some screw the positive connection in the conical seat is almost absent.
  • the contact pattern of the conical seat in the material is influenced by the undercut height for the screw, because the plastic is squeezed and melted by screwing in the screw, which leads to a deformation of the centering cone.
  • the ffertubus on the container shell is not supported and thus elastic designed, which in particular adversely affects the absorption of lateral forces in the traction connection.
  • the invention is therefore based on the object to provide a plastic container with a reliable connection of the tub container cap to the container shell by an improved frictional screw.
  • the achievable with the present invention consist in that due to the conical form closure according to the invention, wherein the height of the screw recess on the dome minimally corresponds to the cone depth of the tub container cap, the cone neither squeezed from the inside nor the centering is impaired.
  • the conical connection thereby has a complete or at least an almost complete positive connection, both axially and in radial directions.
  • the plastic screw in this case has a minimum undercut height under the head, in order to avoid a reduction in the force in the tub material when screwing in and to avoid during operation of the washing aggregate from wandering out of the screw.
  • An optimized screw dome reinforcement in parabolic form of a ribbing on the screwed tube supports the non-positive screw connection.
  • the height of the screw recess is formed smaller than the height of the molded on the tub cap on the molded dome on the end wall of the container shell.
  • the height of the screw recess is formed such that it corresponds at least to the height of the cone.
  • the self-tapping screw has an extension of the shaft region whose Undercut height minimally extends into the screw clearance of the molded dome.
  • the molded on the tub container cap and on the container shell sleeve-shaped screw channels are provided with an external ribbing.
  • This consists of transversely over the sleeve-shaped screw channels extending roof-shaped bridge webs. They give the molded sleeve-shaped screw channels a further stability to the effect that the force of adhesion is delivered to the container shell.
  • the bridge webs increase with increasing screw depth in their extension size, which assumes the characteristic of a parabola with increasing screw depth.
  • the application of force to the sleeve-shaped screw channels is strengthened with increasing screw depth, which allows the lateral surface towards a much larger power transmission.
  • a bridging web is provided on the screw channel integrally formed on the tub, wherein two bridge webs are integrally formed on the screw channel formed on the container shell.
  • the screw channel formed on the container jacket has a conicity. This strengthens the screw connection and prevents self-loosening.
  • the screw has a shorter length in order to avoid a drop in torque drop when the screw tip emerges from the screw channel.
  • the invention further relates to a plastic tub for a washing machine comprising a cylinder-shaped container surrounding the drum, which consists of a molded first shell part, on the front side of a second plastic molded shell part is attached, which for sealing connection by means of a tongue and groove connection and screw connections is fastened, wherein the individual screw connection consists of a self-tapping screw which can be screwed into a screw channel formed on the end wall of the first shell part to produce a frictional connection between the first shell part and the second shell part, a dome being formed on the screw channel, in a molded on the second shell part conical seat engages to produce a positive connection in the screwed state.
  • the height of the screw recess is formed smaller than the height of the formed on the first shell part cone on the integrally formed dome on the front side of the first shell part.
  • the invention with regard to the advantageous and expedient developments also relates to a tub with two shell parts screwed together, in which the shell parts are screwed together, as explained above for the developments for the screw connection of the tub container cap with the coat.
  • the FIG. 1 shows a plastic tub 1 in perspective for a washing machine not shown in which a not directly shown drum is rotatably arranged.
  • the plastic container 1 here consists of a cylindrical container 2, which consists of a molded container shell 3, on which on the front side 4 a plastic molded Laugen userkappe 5 is attached.
  • a circumferential groove 6 and a circumferential spring 7 is provided for sealing connection of the two parts, as well as screw 8 to set the tub cap 5 to the container shell 3.
  • the individual screw 8 consists of a self-tapping screw 9, which is screwed on the end face 4 of the container shell 3 in a molded-in screw channel 10.
  • the screw 9 establishes the frictional connection between the container casing 3 and the tub cap 5.
  • a dome 11 is placed on the screw channel 10, which engages in a formed on the tub cap 5 conical seat 12.
  • the dome 11 and the conical seat 12 make a positive connection in the screwed state, as shown in the FIG. 4 is shown.
  • the seal against the liquid medium via a round seal (not shown) in or on the groove 6 / spring arrangement 7.
  • a round seal not shown
  • the Screw connection 8 must be dimensioned sufficiently safe here, because the container 2 is otherwise leaking, and a total loss of the washing unit can be done.
  • the screw connection 8 is substantially improved in that the integrally formed dome 11 on the end face 4 of the container shell 3, the height H of the screw recess 13 is formed such that it corresponds to at least the height h of the molded on the tub cap 5 cone 14.
  • the height H of the screw lock 13 is a little larger than the height h of the cone 14th
  • the self-tapping screw 9 has an extension of the shaft portion 15, the undercut height of which extends minimally into the screw recess 13 of the integrally formed dome 11. Accordingly, it is also true that the self-tapping screw 9 has an extension of the threaded portion 16 which is minimally smaller than the height H of the screw groove 13.
  • squeezed plastic material has the opportunity to be in the range of Clamping screw lock 13 without deforming the dome 11.
  • the dome 11 is pressed accurately into the conical seat 12. Squeezings from the inside in the cone 14 are thereby excluded.
  • the integrally formed on the tub cap 5 and on the container shell 3 sleeve-shaped screw channels 10 are provided with external ribs 17, in particular in the FIG. 2 but also in the FIG. 1 can be seen, wherein the single ribbing 17 is formed from transversely over the sleeve-shaped screw channel 10 extending roof-shaped bridge webs 18.
  • the bridge webs 18 increase with increasing fferkanaltiefe in their extension size, wherein the extension size of the bridge webs 18 with increasing ringkanaltiefe take the characteristic 17a in about a parabola, as shown in the dash-dotted lines 17a.
  • a bridging web 18 is provided on the screw 10.1 formed on the tub cap 5, wherein two bridge webs 18 are integrally formed on the screw 10.2 formed on the container shell 3. This results in a reinforced screw 8 on the plastic tub 1. As shown in FIG. 3 can still be seen, the integrally formed on the container shell 3 screw 10.2 has a slight conicity.
  • the subject of the invention also relates in the same way to a screw connection 8 for fixing a tub cap 5 to a container casing 3 with the described features.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Closures For Containers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Description

Kunststofflaugenbehälter für eine Waschmaschine mit einer Schraubverbindung zur Festlegung einer aus Kunststoff gefertigten Laugenbehälterkappe an einem KunststofflaugenbehältermantelPlastic container for a washing machine with a screw connection for fixing a plastic container made of plastic tub cap on a plastic liquid container jacket

Die Erfindung betrifft einen Kunststofflaugenbehälter für eine Waschmaschine umfassend ein die Trommel umgebendes zylinderförmig aus Kunststoff geformtes Behältnis, welches aus einem geformten Behältermantel besteht, an dem an der Stirnseite eine aus Kunststoff geformte Laugenbehälterkappe angesetzt ist, welche zur dichtenden Verbindung mittels einer Nut- / Federverbindung sowie Schraubverbindungen befestigt ist, wobei die einzelne Schraubverbindung aus einer selbstschneidenden Schraube besteht, die in einen an der Stirnwand des Behältermantels eingeformten Schraubkanal eindrehbar ist zur Herstellung eines Kraftschlusses zwischen dem Behältermantel und der Laugenbehälterkappe, wobei auf dem Schraubkanal ein Dom angeformt ist, der in einen an der Laugenbehälterkappe eingeformten Kegelsitz greift zur Herstellung einer Formschlussverbindung im verschraubten Zustand.The invention relates to a plastic container for a washing machine comprising a surrounding the drum cylindrical shaped plastic container, which consists of a molded container shell, on the front side of a plastic molded Laugenbehälterkappe is attached, which for sealing connection by means of a tongue and groove connection and Screw is fixed, wherein the single screw connection consists of a self-tapping screw which is screwed into a screwed on the end wall of the container shell screw for producing a frictional connection between the container shell and the tub container cap, wherein on the screw a dome is formed, in a The conical seat molded into the tub cap engages in the screwed state for producing a form-locking connection.

Aus dem Stand der Technik ist bekannt, dass bei Kunststofflaugenbehältern, welche aus einem geformten Behältermantel, sowie aus einer geformten Laugenbehälterkappe bestehen, diese einerseits zur dichtenden Verbindung eine Nut- / Federverbindung haben, sowie Schraubverbindungen, die die kraftschlüssige Verbindung zwischen den Teilen herstellen. Eine derartige Ausführung eines Kunststofflaugenbehälters ist beispielsweise aus der EP 0 835 729 A1 bekannt. So wird bei Kunststofflaugenbehältern in der Regel die vordere Kappe mit dem hinteren Behältermantel durch selbstschneidende Kunststoffschrauben lösbar miteinander verbunden. Die Abdichtung gegenüber den flüssigen Medien erfolgt über eine Runddichtung in Form einer Nut- / Federanordnung zwischen dem Behältermantel und der Laugenbehälterkappe. Über diese Verbindungsanordnung werden alle Kräfte der in der Regel vorne angebrachten Zusatzmassen geleitet. Das sind im Wesentlichen die auftretenden Trägheitskräfte, die aufgrund der rotierenden Massen auftreten. Die den Kraftschluss bewirkenden Schraubverbindungen müssen hierbei ausreichend sicher dimensioniert werden, weil sonst der montierte Kunststofflaugenbehälter Undichtigkeiten aufweisen könnte, was zu einem Totalschaden des Waschaggregats führen kann.It is known from the prior art that in the case of plastic liquor containers, which consist of a molded container casing, as well as of a molded lye container cap, these have, on the one hand, a tongue and groove connection for the sealing connection, as well as screw connections which produce the frictional connection between the parts. Such an embodiment of a plastic tub is, for example, from EP 0 835 729 A1 known. Thus, in the case of plastic liquor containers, the front cap is usually releasably connected to the rear container shell by self-tapping plastic screws. The seal against the liquid media via a round seal in the form of a tongue / groove arrangement between the container shell and the tub container cap. About this connection arrangement all forces of the generally attached at the front additional masses are directed. These are essentially the inertial forces that occur due to the rotating masses. The force-locking screw connections must in this case be dimensioned sufficiently safe, otherwise the assembled plastic tub could have leaks, which can lead to a total loss of the washing unit.

Aus der US 2006/0127198 A1 ist ein Laugenbehälter aus zwei Behälterschalen bekannt, die mittels einer Schraubverbindung miteinander verbunden sind. Hierbei umfasst ein Schalenteil einen am Schraubkanal angeformten Dom, der in einem Kegelsitz am anderen Schaltenteil eingreift. Mittels einer selbstschneidenden Schraube wird der Dom etwas aufgeweitet und in den Kegelsitz verquetscht.From the US 2006/0127198 A1 is a tub of two container shells known, which are interconnected by means of a screw connection. In this case, a shell part comprises a dome formed on the screw, which engages in a conical seat on the other switching part. By means of a self-tapping screw, the dome is slightly widened and squeezed into the conical seat.

Neben der kraftschlüssigen Schraubverbindung wird zusätzlich ein formschlüssiger Verbund über einen Kegelsitz bereitgestellt. Diese formschlüssige Verbindung besteht hierbei aus einem am Behältermantel angeformten Dom, der im montierten Zustand der beiden Teile in einen an der Laugenbehälterkappe eingeformten Kegel greift. Dieser so genannte Kegelsitz ist hierbei aufgrund unterschiedlicher Materialschwindungen ungenau, so dass er ein unregelmäßiges Tragbild aufweist. Wenn auf dem Umfang, zum Beispiel zwanzig Schraubverbindungen verteilt angeordnet sind, so könnte der Fall auftreten, dass bei einigen Schraubverbindungen der Formschluss im Kegelsitz nahezu fehlt. Weiterhin wird das Tragbild des Kegelsitzes im Material durch die Freistichhöhe für die Schraube beeinflusst, weil der Kunststoff durch das Eindrehen der Schraube verquetscht und aufgeschmolzen wird, was zu einer Verformung des Zentrierkegels führt. Der Schraubtubus am Behältermantel ist nicht abgestützt und somit elastisch ausgeführt, was insbesondere die Aufnahme von Querkräften in der Kraftschlussverbindung negativ beeinflusst.In addition to the non-positive threaded connection a positive connection is additionally provided via a conical seat. This positive connection consists in this case of an integrally formed on the container shell dome, which engages in the assembled state of the two parts in a molded-on the Laugenbehälterkappe cone. This so-called conical seat is inaccurate due to different material shrinkage, so that it has an irregular contact pattern. If distributed on the circumference, for example, twenty screw, so it could be the case that in some screw the positive connection in the conical seat is almost absent. Furthermore, the contact pattern of the conical seat in the material is influenced by the undercut height for the screw, because the plastic is squeezed and melted by screwing in the screw, which leads to a deformation of the centering cone. The Schraubtubus on the container shell is not supported and thus elastic designed, which in particular adversely affects the absorption of lateral forces in the traction connection.

Der Erfindung liegt somit die Aufgabe zu Grunde, einen Kunststofflaugenbehälter mit einer zuverlässigen Anbindung der Laugenbehälterkappe an den Behältermantel durch eine verbesserte kraftschlüssige Schraubverbindung bereitzustellen.The invention is therefore based on the object to provide a plastic container with a reliable connection of the tub container cap to the container shell by an improved frictional screw.

Erfindungsgemäß wird diese Aufgabe durch einen Kuststofflaugenbehälter mit den Merkmalen der Ansprüche 1 und 12 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den jeweils nachfolgenden abhängigen Ansprüchen.According to the invention this object is achieved by a Kuststofflaugenbehälter with the features of claims 1 and 12. Advantageous embodiments and modifications of the invention will become apparent from the respective following dependent claims.

Die mit der Erfindung erreichbaren Vorteile bestehen darin, dass aufgrund des erfindungsgemäßen Kegelformschlusses, wobei die Höhe des Schraubenfreistichs am Dom minimal der Kegeltiefe an der Laugenbehälterkappe entspricht, der Kegel von innen weder verquetscht noch die Zentrierung dadurch beeinträchtigt wird. Durch einstellbare Einsätze im Werkzeug wird die unterschiedliche Schwindung ausgeglichen und ein optimaler Traganteil aller Dome eingestellt. Die Kegelverbindung hat dadurch sowohl axial als auch in radialen Richtungen einen vollständigen oder zumindest einen nahezu vollständigen Formschluss. Die Kunststoffschraube hat hierbei unter dem Kopf eine minimale Hinterschnitthöhe, um einen Abbau der Kraft im Laugenbehältermaterial beim Einschrauben zu vermeiden und bei Betrieb des Waschaggregats ein Herauswandern der Schraube zu vermeiden. Eine optimierte Schraubdomverstärkung in Parabelform einer Verrippung am Schraubtubus unterstützt hierbei die kraftschlüssige Schraubenverbindung.The achievable with the present invention consist in that due to the conical form closure according to the invention, wherein the height of the screw recess on the dome minimally corresponds to the cone depth of the tub container cap, the cone neither squeezed from the inside nor the centering is impaired. By adjustable inserts in the tool, the different shrinkage is compensated and set an optimal support ratio of all domes. The conical connection thereby has a complete or at least an almost complete positive connection, both axially and in radial directions. The plastic screw in this case has a minimum undercut height under the head, in order to avoid a reduction in the force in the tub material when screwing in and to avoid during operation of the washing aggregate from wandering out of the screw. An optimized screw dome reinforcement in parabolic form of a ribbing on the screwed tube supports the non-positive screw connection.

Gemäß der Erfindung ist am angeformten Dom an der Stirnwand des Behältermantels die Höhe des Schraubenfreistichs geringer ausgebildet, als die Höhe des an der Laugenbehälterkappe ausgeformten Kegels. Somit wird unterbunden, dass beim Eindrehen der Schraube der Kunststoff verquetscht und aufgeschmolzen wird und sich kein verformter undefinierter Zentrierkegel bilden kann. Der Schraubtubus auf dem Behältermantel wird abgestützt und ist elastisch ausgeführt. Somit sind bei der Aufnahme die Querkräfte wesentlich besser abgestützt.According to the invention, the height of the screw recess is formed smaller than the height of the molded on the tub cap on the molded dome on the end wall of the container shell. Thus it is prevented that when screwing the screw the plastic is squeezed and melted and no deformed undefined centering cone can form. The Schraubtubus on the container shell is supported and is made elastic. Thus, the transverse forces are much better supported during recording.

Nach einer zweckmäßigen Ausgestaltung ist hierbei die Höhe des Schraubenfreistichs derart ausgebildet ist, dass sie mindestens der Höhe des Kegels entspricht. In Weiterbildung weist die selbstschneidende Schraube eine Erstreckung des Schaftbereichs auf, dessen Hinterschnitthöhe sich minimal bis in den Schraubenfreistich des angeformten Doms erstreckt. Somit ergibt sich insbesondere beim Eindrehen bzw. im verspannten Zustand der Schraube ein begrenzter oder geringer Bereich, in dem das aufgequetschte Material eindringen kann. Dies wird auch dadurch unterstützt, dass die selbstschneidende Schraube eine Erstreckung des Gewindebereichs aufweist, der ein wenig geringer ausgebildet ist als die Höhe des Schraubenfreistichs.According to an expedient embodiment, in this case the height of the screw recess is formed such that it corresponds at least to the height of the cone. In a further development, the self-tapping screw has an extension of the shaft region whose Undercut height minimally extends into the screw clearance of the molded dome. Thus, in particular when screwing in or in the clamped state of the screw results in a limited or small area in which the squeezed material can penetrate. This is also supported by the fact that the self-tapping screw has an extension of the threaded portion, which is formed a little smaller than the height of the screw groove.

In vorteilhafter Weiterbildung der Erfindung sind die an der Laugenbehälterkappe sowie an dem Behältermantel angeformten hülsenförmigen Schraubenkanäle mit einer außen liegenden Verrippung versehen. Diese besteht aus sich quer über die hülsenförmigen Schraubenkanäle erstreckenden dachförmigen Brückenstegen. Sie verleihen den angeformten hülsenförmigen Schraubenkanälen eine weitere Stabilität dahingehend, da die Kraft des Kraftschlusses an den Behältermantel abgegeben wird. Dabei nehmen die Brückenstege mit zunehmender Schraubentiefe in ihrer Erstreckungsgröße zu, wobei diese mit zunehmender Schraubentiefe die Kennlinie einer Parabel einnimmt. Somit wird die Krafteinleitung an den hülsenförmigen Schraubenkanälen mit zunehmender Schraubtiefe gestärkt, was zur Mantelfläche hin eine wesentlich größere Kraftübertragung ermöglicht. Dabei ist an dem an den Laugenbehälter angeformten Schraubenkanal ein Brückensteg vorgesehen, wobei an dem an dem Behältermantel angeformten Schraubenkanal zwei Brückenstege angeformt sind. Um insbesondere eine möglichst zunehmende Reibkraft in dem Schraubenkanal bereit zu stellen, weist der an dem Behältermantel eingeformte Schraubenkanal eine Konizität auf. Dadurch wird die Schraubverbindung gestärkt und ein Selbstlösen unterbunden. Die Schraube weist hierbei eine kürzere Länge auf, um ein Schraubmomentabfall beim Austreten der Schraubenspitze aus dem Schraubenkanal zu vermeiden.In an advantageous embodiment of the invention, the molded on the tub container cap and on the container shell sleeve-shaped screw channels are provided with an external ribbing. This consists of transversely over the sleeve-shaped screw channels extending roof-shaped bridge webs. They give the molded sleeve-shaped screw channels a further stability to the effect that the force of adhesion is delivered to the container shell. The bridge webs increase with increasing screw depth in their extension size, which assumes the characteristic of a parabola with increasing screw depth. Thus, the application of force to the sleeve-shaped screw channels is strengthened with increasing screw depth, which allows the lateral surface towards a much larger power transmission. In this case, a bridging web is provided on the screw channel integrally formed on the tub, wherein two bridge webs are integrally formed on the screw channel formed on the container shell. In order in particular to provide a friction force in the screw channel which is as high as possible, the screw channel formed on the container jacket has a conicity. This strengthens the screw connection and prevents self-loosening. In this case, the screw has a shorter length in order to avoid a drop in torque drop when the screw tip emerges from the screw channel.

Die Erfindung betrifft ferner einen Kunststofflaugenbehälter für eine Waschmaschine umfassend ein die Trommel umgebendes zylinderförmig geformtes Behältnis, welches aus einem geformten ersten Schalenteil besteht, an dem an der Stirnseite ein zweites aus Kunststoff geformtes Schalenteil angesetzt ist, welche zur dichtenden Verbindung mittels einer Nut- / Federverbindung sowie Schraubverbindungen befestigt ist, wobei die einzelne Schraubverbindung aus einer selbstschneidenden Schraube besteht, die in einen an der Stirnwand des ersten Schalenteils eingeformten Schraubkanal eindrehbar ist zur Herstellung eines Kraftschlusses zwischen dem ersten Schalenteil und dem zweiten Schalenteil, wobei auf dem Schraubkanal ein Dom angeformt ist, der in einen an dem zweiten Schalenteil eingeformten Kegelsitz greift zur Herstellung einer Formschlussverbindung im verschraubten Zustand. Um eine verbesserte kraftschlüssige Verbindung zwischen den beiden Schalenteilen bereitzustellen, ist am angeformten Dom an der Stirnseite des ersten Schalenteils die Höhe des Schraubenfreistichs geringer ausgebildet, als die Höhe des am ersten Schalenteil ausgeformten Kegels.The invention further relates to a plastic tub for a washing machine comprising a cylinder-shaped container surrounding the drum, which consists of a molded first shell part, on the front side of a second plastic molded shell part is attached, which for sealing connection by means of a tongue and groove connection and screw connections is fastened, wherein the individual screw connection consists of a self-tapping screw which can be screwed into a screw channel formed on the end wall of the first shell part to produce a frictional connection between the first shell part and the second shell part, a dome being formed on the screw channel, in a molded on the second shell part conical seat engages to produce a positive connection in the screwed state. In order to provide an improved frictional connection between the two shell parts, the height of the screw recess is formed smaller than the height of the formed on the first shell part cone on the integrally formed dome on the front side of the first shell part.

Insgesamt bezieht sich die Erfindung hinsichtlich der vorteilhaften und zweckmäßigen Weiterbildungen auch auf einen Laugenbehälter mit zwei miteinander verschraubten Schalenteilen, bei dem die Schalenteile so miteinander verschraubt sind, wie es vorstehend entsprechend für die Weiterbildungen für die Schraubverbindung der Laugenbehälterkappe mit dem Mantel erläutert ist.Overall, the invention with regard to the advantageous and expedient developments also relates to a tub with two shell parts screwed together, in which the shell parts are screwed together, as explained above for the developments for the screw connection of the tub container cap with the coat.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt

Figur 1
eine perspektivische Darstellung des Laugenbehälters;
Figur 2
eine weitere perspektivische Darstellung des Laugenbehälter in der Detailansicht, hier insbesondere in Ansicht der Schraubverbindungen;
Figur 3
eine geschnittene Ansicht einer Schraubverbindung gemäß der Figur 2 ohne Schraube;
Figur 4
eine weitere geschnittene Ansicht gemäß der Figur 3 mit einer Verbindungs-schraube.
An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. It shows
FIG. 1
a perspective view of the tub;
FIG. 2
a further perspective view of the tub in the detail view, in particular in view of the screw;
FIG. 3
a sectional view of a screw according to the FIG. 2 without screw;
FIG. 4
another sectional view according to the FIG. 3 with a connecting screw.

Die Figur 1 zeigt einen Kunststofflaugenbehälter 1 in der Perspektive für eine nicht näher dargestellte Waschmaschine, in dem eine nicht unmittelbar gezeigte Trommel drehbar angeordnet ist. Der Kunststofflaugenbehälter 1 besteht hierbei aus einem zylinderförmigen Behältnis 2, welches aus einem geformten Behältermantel 3 besteht, an dem an der Stirnseite 4 eine aus Kunststoff geformte Laugenbehälterkappe 5 angesetzt ist. Wie insbesondere aus den Figuren 3 und 4 zu erkennen ist, ist zur dichtenden Verbindung der beiden Teile eine umlaufende Nut 6 und eine umlaufende Feder 7 vorgesehen, sowie Schraubverbindungen 8, um die Laugenbehälterkappe 5 an dem Behältermantel 3 festzulegen. In der Figur 4 ist zu erkennen, dass die einzelne Schraubverbindung 8 aus einer selbstschneidenden Schraube 9 besteht, die an der Stirnseite 4 des Behältermantels 3 in einen eingeformten Schraubenkanal 10 eingedreht wird. Die Schraube 9 stellt den Kraftschluss zwischen dem Behältermantel 3 und der Laugenbehälterkappe 5 her.The FIG. 1 shows a plastic tub 1 in perspective for a washing machine not shown in which a not directly shown drum is rotatably arranged. The plastic container 1 here consists of a cylindrical container 2, which consists of a molded container shell 3, on which on the front side 4 a plastic molded Laugenbehälterkappe 5 is attached. As in particular from the Figures 3 and 4 can be seen, a circumferential groove 6 and a circumferential spring 7 is provided for sealing connection of the two parts, as well as screw 8 to set the tub cap 5 to the container shell 3. In the FIG. 4 It can be seen that the individual screw 8 consists of a self-tapping screw 9, which is screwed on the end face 4 of the container shell 3 in a molded-in screw channel 10. The screw 9 establishes the frictional connection between the container casing 3 and the tub cap 5.

Wie insbesondere aus den geschnittenen Darstellungen der Figuren 3 und 4 deutlich zu erkennen ist, ist auf dem Schraubenkanal 10 ein Dom 11 aufgesetzt, der in einen an der Laugenbehälterkappe 5 eingeformten Kegelsitz 12 greift. Der Dom 11 und der Kegelsitz 12 stellen eine Formschlussverbindung im verschraubten Zustand her, so wie dies in der Figur 4 dargestellt ist. Wie bereits schon ausgeführt, erfolgt die Abdichtung gegenüber dem flüssigen Medium über eine Runddichtung (nicht dargestellt) in oder an der Nut- 6 / Federanordnung 7. Über diese Verbindung werden alle Kräfte der in der Regel an der Laugenbehälterkappe 5 oder Mantel 3 angebrachten Zusatzmassen oder die Trommellagerung geleitet. Dies sind im Wesentlichen die sich ergebenden Trägheitskräfte, die eine Verwindung im Behälter 2 verursachen. Die Schraubenverbindung 8 muss hierbei ausreichend sicher dimensioniert sein, weil der Behälter 2 sonst undicht wird, und ein Totalschaden des Waschaggregats erfolgen kann. Nach der Erfindung wird die Schraubenverbindung 8 dadurch wesentlich verbessert, dass am angeformten Dom 11 an der Stirnseite 4 des Behältermantels 3 die Höhe H des Schraubenfreistichs 13 derart ausgebildet ist, dass sie mindestens der Höhe h des an der Laugenbehälterkappe 5 ausgeformten Kegels 14 entspricht. In einer anderen Ausführung ist die Höhe H des Schraubenfreistichs 13 ein wenig größer, als die Höhe h des Kegels 14.As in particular from the cut representations of Figures 3 and 4 can be clearly seen, a dome 11 is placed on the screw channel 10, which engages in a formed on the tub cap 5 conical seat 12. The dome 11 and the conical seat 12 make a positive connection in the screwed state, as shown in the FIG. 4 is shown. As already stated, the seal against the liquid medium via a round seal (not shown) in or on the groove 6 / spring arrangement 7. About this compound all forces of the usually attached to the tub cap 5 or 3 shells additional masses or directed the drum storage. These are essentially the resulting inertial forces that cause distortion in the container 2. The Screw connection 8 must be dimensioned sufficiently safe here, because the container 2 is otherwise leaking, and a total loss of the washing unit can be done. According to the invention, the screw connection 8 is substantially improved in that the integrally formed dome 11 on the end face 4 of the container shell 3, the height H of the screw recess 13 is formed such that it corresponds to at least the height h of the molded on the tub cap 5 cone 14. In another embodiment, the height H of the screw lock 13 is a little larger than the height h of the cone 14th

Wie aus der Figur 4 deutlich wird, weist die selbstschneidende Schraube 9 eine Erstreckung des Schaftbereichs 15 auf, dessen Hinterschnitthöhe sich minimal bis in den Schraubenfreistich 13 des angeformten Doms 11 erstreckt. Entsprechend gilt dann auch, dass die selbstschneidende Schraube 9 eine Erstreckung des Gewindebereichs 16 aufweist, der minimal geringer ausgebildet ist, als die Höhe H des Schraubenfreistichs 13. Somit ergibt sich eine Zentrierung mit Kegelformschluss, weil aufgequetschtes Kunststoffmaterial die Möglichkeit hat, sich im Bereich des Schraubenfreistichs 13 anzusammeln, ohne den Dom 11 zu verformen. Dadurch wird der Dom 11 passgenau in den Kegelsitz 12 gepresst. Verquetschungen von innen her im Kegel 14 sind dadurch ausgeschlossen.Like from the FIG. 4 becomes clear, the self-tapping screw 9 has an extension of the shaft portion 15, the undercut height of which extends minimally into the screw recess 13 of the integrally formed dome 11. Accordingly, it is also true that the self-tapping screw 9 has an extension of the threaded portion 16 which is minimally smaller than the height H of the screw groove 13. Thus results in a centering with conical form closure, because squeezed plastic material has the opportunity to be in the range of Clamping screw lock 13 without deforming the dome 11. As a result, the dome 11 is pressed accurately into the conical seat 12. Squeezings from the inside in the cone 14 are thereby excluded.

Nach einer besonders vorteilhaften Ausgestaltung der Erfindung sind die an der Laugenbehälterkappe 5 sowie an dem Behältermantel 3 angeformten hülsenförmigen Schraubenkanäle 10 mit außen liegenden Verrippungen 17 versehen, die insbesondere in der Figur 2, aber auch in der Figur 1 zu erkennen sind, wobei die einzelne Verrippung 17 aus sich quer über den hülsenförmigen Schraubenkanal 10 erstreckenden dachförmigen Brückenstegen 18 gebildet wird. Dabei nehmen die Brückenstege 18 mit zunehmender Schraubkanaltiefe in ihrer Erstreckungsgröße zu, wobei die Erstreckungsgröße der Brückenstege 18 mit zunehmender Schraubkanaltiefe die Kennlinie 17a in etwa einer Parabel einnehmen, wie dies in der strichpunktierten Linienführung 17a dargestellt ist. Wie insbesondere aus der Figur 2, aber auch aus der Figur 3 ersichtlich ist, ist an dem an der Laugenbehälterkappe 5 angeformten Schraubkanal 10.1 ein Brückensteg 18 vorgesehen, wobei an dem an dem Behältermantel 3 angeformten Schraubkanal 10.2 zwei Brückenstege 18 angeformt sind. Somit ergibt sich eine verstärkte Schraubverbindung 8 an dem Kunststofflaugenbehälter 1. Wie aus der Figur 3 noch zu erkennen ist, weist der an dem Behältermantel 3 angeformte Schraubkanal 10.2 eine leichte Konizität auf.According to a particularly advantageous embodiment of the invention, the integrally formed on the tub cap 5 and on the container shell 3 sleeve-shaped screw channels 10 are provided with external ribs 17, in particular in the FIG. 2 but also in the FIG. 1 can be seen, wherein the single ribbing 17 is formed from transversely over the sleeve-shaped screw channel 10 extending roof-shaped bridge webs 18. In this case, the bridge webs 18 increase with increasing Schraubkanaltiefe in their extension size, wherein the extension size of the bridge webs 18 with increasing Schraubkanaltiefe take the characteristic 17a in about a parabola, as shown in the dash-dotted lines 17a. As in particular from the FIG. 2 , but also from the FIG. 3 it can be seen, a bridging web 18 is provided on the screw 10.1 formed on the tub cap 5, wherein two bridge webs 18 are integrally formed on the screw 10.2 formed on the container shell 3. This results in a reinforced screw 8 on the plastic tub 1. As shown in FIG. 3 can still be seen, the integrally formed on the container shell 3 screw 10.2 has a slight conicity.

Der Gegenstand der Erfindung betrifft in gleicher Weise auch eine Schraubverbindung 8 zur Festlegung einer Laugenbehälterkappe 5 an einem Behältermantel 3 mit den beschriebenen Merkmalen.The subject of the invention also relates in the same way to a screw connection 8 for fixing a tub cap 5 to a container casing 3 with the described features.

Claims (12)

  1. Plastics suds container (1) for a washing machine comprising a cylindrically shaped receptacle (2) surrounding the drum, which receptacle consists of a shaped container casing (3), on the end face (4) of which a suds container cap (5) made of plastics material is set, which is fastened for sealing connection by means of a tongue and groove connection (6, 7) and screw connections (8), each screw connection (8) consisting of a self-tapping screw (9) which can be screwed into a screw channel (10) that is moulded onto the end wall (4) of the container casing (3) to produce a frictional fit between the container casing (3) and the suds container cap (5), a dome (11) being integrally formed on the screw channel (10.1), which dome engages in a conical seat (12) that is moulded onto the suds container cap (5) to produce a form fit connection when screwed together, characterised in that the height (H) of the screw relief groove (13) on the dome (11) that is moulded onto the end face (4) of the container casing (3) is less than the height (h) of the cone (14) that is moulded onto the suds container cap (5).
  2. Plastics suds container according to claim 1, characterised in that the height (H) of the screw relief groove (13) corresponds at least to the height (h) of the cone (14).
  3. Plastics suds container according to claim 1, characterised in that the self-tapping screw (9) comprises an extension of the shaft region (15), the undercut height of which extends at least as far as into the screw relief groove (13) of the moulded-on dome (11).
  4. Plastics suds container according to claim 1, characterised in that the self-tapping screw (9) comprises an extension of the threaded region (16) that is at least smaller than the height of the screw relief groove (13).
  5. Plastics suds container according to claim 1, characterised in that the sleeve-shaped screw channels (10) that are integrally formed on the suds container cap (5) and on the container casing (3) are provided with external ribbing (17).
  6. Plastics suds container according to claim 5, characterised in that the ribbing (17) consists of roof-shaped bridging webs (18) which extend transversely over the sleeve-shaped screw channels (10).
  7. Plastics suds container according to claim 6, characterised in that the extension size of the bridging webs (18) increases as the depth of the screw channel increases.
  8. Plastics suds container according to claim 7, characterised in that extension size of the bridging webs (18) takes the characteristic curve (17a) into approximately a parabola as the depth of the screw channel increases.
  9. Plastics suds container according to claim 6 and claim 7, characterised in that a bridging web (18) is integrally formed on the screw channel (10.1) that is integrally formed on the suds container cap (5).
  10. Plastics suds container according to claims 6 and 7, characterised in that two bridging webs (18) are integrally formed on the screw channel (10.2) that is integrally formed on the container casing (3).
  11. Plastics suds container according to claim 1, characterised in that the screw channel (10.2) that is moulded onto the container casing (3) has a conicity.
  12. Plastics suds container (1) for a washing machine comprising a cylindrically shaped receptacle (2) surrounding the drum, which receptacle consists of a shaped first shell part (3), on the end face (4) of which a second shell part (5) made of plastics material is set, which is fastened for sealing connection by means of a tongue and groove connection (6, 7) and screw connections (8), each screw connection (8) consisting of a self-tapping screw (9) which can be screwed into a screw channel (10) that is moulded onto the end wall (4) of the first shell part (3) to produce a frictional fit between the first shell part (3) and the second shell part (5), a dome (11) being integrally formed on the screw channel (10.1) which dome engages in a conical seat (12) that is moulded onto the second shell part (5) to produce a form fit connection when screwed together, characterised in that the height (H) of the screw relief groove (13) on the dome (11) that is integrally formed on the end face (4) of the first shell part (3) is less than the height (h) of the cone (14) that is moulded onto the second shell part (5).
EP20110401038 2011-03-07 2011-03-07 Plastic laundry container for a washing machine having a screw connection for fixing the plastic container cap to a plastic laundry container casing Active EP2497853B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES11401038T ES2401596T3 (en) 2011-03-07 2011-03-07 Plastic container for a washing machine with a screw connection to fix a cover for the washing tray made of plastic to a plastic cover for the washing tray
EP20110401038 EP2497853B1 (en) 2011-03-07 2011-03-07 Plastic laundry container for a washing machine having a screw connection for fixing the plastic container cap to a plastic laundry container casing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110401038 EP2497853B1 (en) 2011-03-07 2011-03-07 Plastic laundry container for a washing machine having a screw connection for fixing the plastic container cap to a plastic laundry container casing

Publications (2)

Publication Number Publication Date
EP2497853A1 EP2497853A1 (en) 2012-09-12
EP2497853B1 true EP2497853B1 (en) 2013-02-13

Family

ID=44350579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110401038 Active EP2497853B1 (en) 2011-03-07 2011-03-07 Plastic laundry container for a washing machine having a screw connection for fixing the plastic container cap to a plastic laundry container casing

Country Status (2)

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EP (1) EP2497853B1 (en)
ES (1) ES2401596T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20131867A1 (en) * 2013-11-11 2015-05-12 Iwt Srl VAPOR FELLING EQUIPMENT FOR WASHING MACHINES AND WASHING MACHINE INCLUDING THE EQUIPMENT
KR102418293B1 (en) * 2015-03-04 2022-07-08 삼성전자주식회사 Drum type washing machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2102973B1 (en) * 1996-01-31 1998-04-01 Balay Sa CLOSING SYSTEM FOR PLASTIC WASHING MACHINE.
IT1289395B1 (en) 1996-10-08 1998-10-02 Electrolux Zanussi Elettrodome PERFECTED PROCESS FOR INJECTION MOLDING OF PLASTIC PRODUCTS
ES2151330B1 (en) * 1997-01-21 2001-06-16 Balay Sa IMPROVED CLOSURE SYSTEM FOR WASHER PLASTIC CUBA.
ES2152144B1 (en) * 1998-02-20 2001-08-01 Balay Sa SYSTEM OF UNION OF THE TWO HALVES OF A PLASTIC CUBA OF WASHING MACHINE.
ES2230958B1 (en) * 2002-09-11 2006-03-01 Bsh Electrodomesticos España, S.A. WASHER CUBE.

Also Published As

Publication number Publication date
ES2401596T3 (en) 2013-04-22
EP2497853A1 (en) 2012-09-12

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