EP0854223B1 - Improved closing system in plastic tank for washing machine - Google Patents

Improved closing system in plastic tank for washing machine Download PDF

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Publication number
EP0854223B1
EP0854223B1 EP98500012A EP98500012A EP0854223B1 EP 0854223 B1 EP0854223 B1 EP 0854223B1 EP 98500012 A EP98500012 A EP 98500012A EP 98500012 A EP98500012 A EP 98500012A EP 0854223 B1 EP0854223 B1 EP 0854223B1
Authority
EP
European Patent Office
Prior art keywords
halves
tub
studs
lugs
closure system
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.)
Expired - Lifetime
Application number
EP98500012A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0854223A2 (en
EP0854223A3 (en
Inventor
Ismael Gracia Boved
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.)
BSH Balay SA
Original Assignee
BSH Balay SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Balay SA filed Critical BSH Balay SA
Publication of EP0854223A2 publication Critical patent/EP0854223A2/en
Publication of EP0854223A3 publication Critical patent/EP0854223A3/en
Application granted granted Critical
Publication of EP0854223B1 publication Critical patent/EP0854223B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D06F37/261—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements
    • D06F37/263—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements assembled from at least two elements connected to each other; Connecting or sealing means therefor

Definitions

  • the invention relates to an improved closure system for a washing-machine plastic tub of the type made out of two moulded halves, the face to be joined remaining open for both halves while for one of the halves the other face corresponds to the front of the tub in relation to the washing-machine door, and for the other half, the other face forms the closed rear side with a central, axial opening allowing the drum spindle to pass, so that the two halves can be separated in the event of any malfunction by servicing personnel, to allow access to its interior for repairing such malfunction.
  • closure system permits, if necessary, servicing personnel to separate the two halves easily and rapidly so that, once the malfunction has been repaired, the two halves of the tub can be reassembled conventionally by means of screws and corresponding nuts.
  • plastic tubs consisting of two shells are known from EP 0 103 418 A1, EP 0 152 745 and from EP 0 497 109 A1.
  • EP 0 103 418 A1 the shells can not be separated afterware since they are welded together and the shells of EP 0 497 109 A1 and EP 0 152 745 are assembled by screw fastening.
  • the aim is to obtain a completely reliable closure of the two halves of the plastic tub as well as to allow their separation by servicing personnel and their subsequent reassembly.
  • the two halves of the tub determine its configuration upon their joining along their central periphery subsequent to introducing the corresponding seal for watertightness, while one of the faces of one of said halves has an opening with respect to the door of the washing machine and a face of the other half forms the closed rear member and has a central, axial opening to allow for the drum spindle to pass.
  • Plastic tubs of washing machines are conventionally moulded as two halves which, once joined, form the tub of the washing machine that houses the drum so that the body of the tub itself is made in a way to form the attachments required to fasten it and to join it to other items as well as to be able to join the two halves with each other in order to form a watertight housing.
  • the two halves forming the tub of the washing machine are joined peripherally along their central outline in a way to leave one of the halves open with respect to the front door of the washing machine while the other half forms the rear part of the tub and has a central, axial opening allowing the drum spindle to pass through and be held by the tub.
  • some radial lugs are formed and provided with openings to allow for tightening the corresponding screws used to materialise the closure.
  • the joining of the two halves is done by a number of screws fastening the two members together so that one or several operators have to tighten the screws, which takes much time assuming that joining the two halves will require approximately 17 screws.
  • the washing-machine tub so configured can be disassembled if necessary for technical purposes by separating the two halves upon removing all fastening screws while, later on, it can be reassembled once the two halves forming the tub have been attached to each other again by means of said fastening screws.
  • patent no. ES P 96 00 222 discloses a closure system for the plastic tub of a washing machine which basically consists in providing one of the halves of the tub with a multiplicity of projections having the shape of a harpoon tip that, during assembly of the two halves, are placed against corresponding recesses on the other half of the tub, junction being achieved by lodging the projections having the form of a harpoon tip in said recesses.
  • This embodiment allows the two halves to be separated if required by breaking the fastening elements so that both halves can be rejoined again by means of the corresponding lugs having openings for positioning the relevant fastening screws.
  • an improved closure system for the plastic tub of a washing machine which tub is of the type made out of two halves obtained by moulding, the faces to be joined of such halves remaining open while in one of the halves the other face corresponds to the front of the tub relative to the washing-machine door, and for the other half, the other face forms the closed rear part having a central, axial opening to allow the spindle of the drum to pass so that the two halves, when joined, form the tub of the washing machine and have a multiplicity of radial lugs abutting on each other.
  • the right-angle projections attached to the outside face of the radial lugs of one of the tub halves are formed by corresponding studs having a central, axial hole made relative to the point of its origin on the corresponding lug.
  • the studs moulded solid with the lugs on one half of the tub have a central, axial blind hole so that when held within, and protruding from, the openings of the lugs attached to the other half, heat is applied to the free protruding ends of the studs which will melt and form a thickening in the form of a spherical cap having a diameter superior to the opening of the lug in which the stud is held so that, upon solidifying and cooling, they are fastened on to each other.
  • the studs moulded solid with the lugs of one half of the tub can be provided with a central, axial through hole so that when held within, and protruding from, the openings of the lugs attached to the other half as heat is applied onto any protruding end it will melt and form a thickening having the form of a peripheral ring of semicircular cross-section with a diameter superior to the opening of the lug holding it so that, upon solidifying and cooling, a fastening as by rivets is materialised.
  • both halves of the tub So as to ensure that, during the joining process by melting the free ends of the studs the two halves of the tub will remain perfectly aligned while the melted material solidifies and cools, both halves are placed under constant pressure preventing the pressure generated by the annular joint from displacing the two halves relative to each other.
  • the right-angle projections on the radial lugs around one of the tub halves are formed by a tubular member each while the lugs on the other half of the tub have an opening with a chamfered border on the side opposite the abutting face and with respect to which there is, moreover a pair of reinforcements supporting a truncated cone, all of it made during the same moulding process as used for the above-mentioned tub half.
  • the tubular member are provided at their free ends with a pair of radial slots diametrically opposed to each other, while through hole is located centrally.
  • the two halves 1 and 2 made by moulding and forming, upon being joined, the plastic tub of the washing machine, have a multiplicity of lugs 3 and 4 respectively arranged around the periphery of the open, abutting face so that lugs 3 on one half of the tub have at their outer faces appropriate projections, while lugs 4 on the other corresponding half of the tub have through holes to lodge the projections mentioned.
  • the closed face of one of the halves forming the tub constitutes said closed face having a central, axial opening allowing the spindle of the drum to pass, while the other face on the opposite half contains an opening arranged relating to the door of the washing machine.
  • the periphery of the faces of the two halves 1 and 2 to be joined to form the tub of the washing machine one of them has a recess 5 in which a corresponding annular seal is lodged on which lip 6 on the opposite half to be joined will rest.
  • the two halves of the tub to be joined have a multiplicity of lugs provided with corresponding through holes which, during the assembly of the two halves, are abutted against each other so as to form the junction by means of screws and corresponding nuts, said junction being implemented by means of approximately 17 screws, which increase expenses both by the cost of the screws themselves and by the time required to screw them down.
  • patent no. ES P 96 00 222 already discloses a junction system for two halves of a tub by means of a number of projections having the shape of a harpoon tip that are inserted and retained in corresponding recesses so that a junction is achieved by a simple press stroke.
  • This form of anchoring makes it necessary to rupture, whenever the tub is disassembled, said anchoring means so as to free the two halves. Subsequently, they have to be reunited by conventional means, upon joining the two halves of the tub, via the corresponding lugs having appropriate through holes to allow for placing the fastening screws.
  • the present invention discloses an anchoring system constituted by two practical embodiments that both can be disassembled to allow for servicing the tub in the case of malfunction. Both embodiments are very simple and thus very economic.
  • the lugs 3 on one of the halves 1 constituting the tub have, relative to their internal faces various studs 7 with a central, axial hole while on their opposite face, said lugs 3 have a hexagonal recess 9 and the other half 2 of the tub bears corresponding lugs 4 having appropriate openings 8.
  • studs 7 having a central, axial blind hole 10 with respect to their point of origin are passed through the relative openings 8 so as to protrude from the holding lugs. While maintaining constant pressure on both halves, heat can be applied to the free ends of the protruding studs so that they will melt and form a spherical cap with a diameter superior to the opening which, subsequent cooling will produce a perfect closure between both halves.
  • studs 7 can be provided with a central, axial through hole so that, whenever heat is applied to them, their ends will melt and form a peripheral ring 13 having a semicircular section like a rivet, which likewise results in a perfect closure between the two halves subsequent to cooling.
  • lugs 3 on half 1 of the two halves constituting the tub show on their external faces various tubular members 14 provided at their free ends with a pair of radial slots 15 so that said tubular members 14 are held in the corresponding openings 16 of lugs 4 on the opposite half of the tub but projecting beyond it.
  • opening 16 has a chamfered border 17 formed on its inside as well as reinforcements 18 supporting a truncated-cone member 19 in alignment with opening 16 of the corresponding lug 4.
  • the truncated-cone members 19 will be pressued in said tubular members 14 held within the corresponding openings 16 and projecting beyond them in a manner so that the two limbs formed on their tips by slots 15 adapt to the chamfered border 17 of opening 16.
  • the tubular member 14 may be provided, in order to secure members 19, on its inside with counter-projections 20 ensuring the positioning of said truncated-cone member 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Prostheses (AREA)
  • Closures For Containers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
EP98500012A 1997-01-21 1998-01-20 Improved closing system in plastic tank for washing machine Expired - Lifetime EP0854223B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES9700103A ES2151330B1 (es) 1997-01-21 1997-01-21 Sistema de cierre mejorado para cuba plastica de lavadora.
ES9700103 1997-01-21

Publications (3)

Publication Number Publication Date
EP0854223A2 EP0854223A2 (en) 1998-07-22
EP0854223A3 EP0854223A3 (en) 1998-10-14
EP0854223B1 true EP0854223B1 (en) 2003-04-16

Family

ID=8297929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98500012A Expired - Lifetime EP0854223B1 (en) 1997-01-21 1998-01-20 Improved closing system in plastic tank for washing machine

Country Status (3)

Country Link
EP (1) EP0854223B1 (es)
DE (1) DE69813324T2 (es)
ES (1) ES2151330B1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022248175A1 (de) * 2021-05-28 2022-12-01 BSH Hausgeräte GmbH Laugenbehälter mit spezifischem verbindungsbereich zwischen einem hohlzylinder und einer rückwand, sowie haushaltsgerät

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2237976B1 (es) 2002-07-19 2007-06-01 Bsh Electrodomesticos España, S.A. Procedimiento de fijacion del tambor de una lavadora y la correspondiente fijacion.
ES2230958B1 (es) * 2002-09-11 2006-03-01 Bsh Electrodomesticos España, S.A. Cuba de lavadora.
ES2238153B1 (es) * 2003-08-14 2008-06-16 Bsh Electrodomesticos España S.A. Sistema de apertura de una cuba de lavadora.
ES2317729B1 (es) * 2006-04-12 2010-02-11 Bsh Electrodomesticos España S.A. Cuba para maquina lavadora.
ITMC20060020U1 (it) * 2006-05-04 2007-11-05 Meccanica Generale Srl Vasca componibile per lavatrici, lavasciugatrici e simili.
ES2339625B1 (es) * 2007-08-14 2011-03-16 Bsh Electrodomesticos España, S.A Dispositivo de fijacion, para fijar un elemento de soporte de tambor a un tambor de una maquina lavadora y procedimiento para fijarlo.
ES2401596T3 (es) * 2011-03-07 2013-04-22 Miele & Cie. Kg Recipiente de plástico para una máquina lavadora con una atornilladura para fijar una tapa para la cubeta de lavado fabricada de plástico a una cubierta de plástico para la cubeta de lavado
CN103409969B (zh) * 2013-07-30 2016-03-09 松下家电研究开发（杭州）有限公司 一种滚筒洗衣机
KR102531717B1 (ko) * 2018-06-01 2023-05-11 엘지전자 주식회사 세탁기의 터브 및 이를 구비한 세탁기
KR102627974B1 (ko) * 2018-11-14 2024-01-23 엘지전자 주식회사 세탁기의 터브 및 이를 구비한 세탁기
KR102627978B1 (ko) * 2018-11-14 2024-01-23 엘지전자 주식회사 세탁기의 터브 및 이를 구비한 세탁기
CN109706695A (zh) * 2019-03-20 2019-05-03 滦州怡琪科技有限责任公司 滚筒洗衣机外筒密封结构
DE102021203346A1 (de) 2021-04-01 2022-10-06 BSH Hausgeräte GmbH Laugenbehälter und Wäschebehandlungsgerät

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103418A2 (en) * 1982-09-15 1984-03-21 Colston Domestic Appliances Limited Spin dryer with plastic drum
EP0152745A2 (en) * 1984-02-13 1985-08-28 INDUSTRIE ZANUSSI S.p.A. Plastic tub for a laundry washing machine
EP0497109A1 (en) * 1991-01-30 1992-08-05 Zanussi Elettrodomestici S.p.A. Ballasted tub for washing machines

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1513957A (fr) * 1966-03-10 1968-02-16 Bosch Hausgeraete Gmbh Machine à laver
DE3068041D1 (en) * 1979-09-19 1984-07-05 Amiens Const Elect Mec Washing and spin drying machine, the drum being driven by an immersed belt
FR2606798B1 (fr) * 1986-11-18 1989-01-13 Ciapem Lave-linge muni d'une cuve en matiere synthetique
ES1001168Y (es) * 1986-12-11 1988-11-16 Pascor, S.A. Cuba contenedora de liquidos para acoplamiento a lavadoras automaticas

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103418A2 (en) * 1982-09-15 1984-03-21 Colston Domestic Appliances Limited Spin dryer with plastic drum
EP0152745A2 (en) * 1984-02-13 1985-08-28 INDUSTRIE ZANUSSI S.p.A. Plastic tub for a laundry washing machine
EP0497109A1 (en) * 1991-01-30 1992-08-05 Zanussi Elettrodomestici S.p.A. Ballasted tub for washing machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022248175A1 (de) * 2021-05-28 2022-12-01 BSH Hausgeräte GmbH Laugenbehälter mit spezifischem verbindungsbereich zwischen einem hohlzylinder und einer rückwand, sowie haushaltsgerät

Also Published As

Publication number Publication date
ES2151330A1 (es) 2000-12-16
DE69813324T2 (de) 2003-10-23
EP0854223A2 (en) 1998-07-22
ES2151330B1 (es) 2001-06-16
DE69813324D1 (de) 2003-05-22
EP0854223A3 (en) 1998-10-14

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