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EP0801163B1 - Procédé de montage d'un anneau de couplage pour cuve de machine à laver - Google Patents

Procédé de montage d'un anneau de couplage pour cuve de machine à laver Download PDF

Info

Publication number
EP0801163B1
EP0801163B1 EP97830045A EP97830045A EP0801163B1 EP 0801163 B1 EP0801163 B1 EP 0801163B1 EP 97830045 A EP97830045 A EP 97830045A EP 97830045 A EP97830045 A EP 97830045A EP 0801163 B1 EP0801163 B1 EP 0801163B1
Authority
EP
European Patent Office
Prior art keywords
ring
bolt
clamping
auxiliary tool
coupling
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
EP97830045A
Other languages
German (de)
English (en)
Other versions
EP0801163A3 (fr
EP0801163A2 (fr
Inventor
Giorgio c/o Lemp Srl Piani
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.)
Lemp Srl
Original Assignee
Lemp Srl
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 Lemp Srl filed Critical Lemp Srl
Publication of EP0801163A2 publication Critical patent/EP0801163A2/fr
Publication of EP0801163A3 publication Critical patent/EP0801163A3/fr
Application granted granted Critical
Publication of EP0801163B1 publication Critical patent/EP0801163B1/fr
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
    • D06F37/263—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B25/00—Implements for fastening, connecting or tensioning of wire or strip

Definitions

  • the present invention relates to coupling split rings for coupling the peripheral flanges of two elements constituting the tub of a laundry washing machine.
  • Such rings are constituted by a channel-like profile element bent in a ring, of metal material, having two side wings and a central bottom wall which define a substantially C-shaped cross-section, with its cavity facing towards the axis of the ring, the channel-like profile element having passages for engagement of a clamping tangential bolt at its two adjacent ends.
  • the invention is applicable to any split ring of the above indicated type.
  • the invention is applicable to rings of the most conventional type in which the adjacent ends of the ring are bent outwardly, substantially at a right angle with respect to the adjacent part of the ring and have a pair of facing holes for engagement of the clamping tangential bolt.
  • the invention is applicable to rings of the type forming the subject of European patent EP-B-0 210 143, in which each end of the ring is permanently deformed so as to become radially offset outwardly with respect to the adjacent portion of the ring and the bottom wall of the profile element which connects the bottom wall of each offset end portion to that of the adjacent part of the profile element has a hole which defines a passage for engagement of the clamping tangential bolt along with the cavity of the offset end portion. Rings of this second type have found large use in recent years due to their advantages with respect to the above mentioned most conventional solution from the standpoint of reliability of the coupling and simplicity of manufacture and mounting.
  • the ring When mounting the coupling rings of the above indicated type, the ring is initially arranged over the juxtaposed flanges of the elements to be coupled, whereupon the clamping bolt is screwed, so as to cause the two ends of the ring to move towards each other so as to clamp the ring on said peripheral flanges.
  • This method implies that the coupling ring, particularly at its two ends connected by the bolt is designed and made with material and dimensions such as to ensure that the load determined by the clamping of the bolt may be discharged on the material of the ring without causing a deformation thereof.
  • the object of the present invention is that of providing a method for mounting coupling rings of the above indicated type which allows the structure of the ring to be rendered simpler and of lower cost.
  • the sheet metal used for making the ring can have a smaller thickness with respect to that of the rings used up to now.
  • the most critical moment from the point of view of the stress on the material of the ring is that at which the two ends of the ring are moved towards each other by clamping the tangential bolt.
  • the bolt exerts on the ends of the ring a load which greatly stresses the material and therefore implies the use of a sheet metal of some thickness.
  • the clamping bolt is not used to cause the ends of the ring to move towards each other, this movement being obtained by an auxiliary tool which pushes the two ends of the ring towards each other.
  • Each end of the ring therefore is no longer subjected to a high tensile stress determined by the clamping bolt, so that the sheet metal of the ring may be of a reduced thickness.
  • the bolt is applied only once the two ends of the ring have been moved towards each other, so that the material of the ring must have only a strength sufficient to support the load due to that, when mounting is completed, the bolt prevents the ring from returning to its undeformed condition. Furthermore, since the bolt is applied after that the ends of the ring have been moved towards each other, it can be provided with a length much lower than that necessary with rings which are mounted in the conventional way.
  • the auxiliary tool used to cause the movement of the two ends of the ring towards each other may be of any type.
  • it includes a pair of jaws adapted to respectively engage the two ends of the ring and to push them towards each other,these jaws being further provided with means for guiding and automatically loading the screw and the nut forming the clamping tangential bolt.
  • said two jaws may be movable between an opened position and a closed position by a fluid cylinder, so as to render the mounting process of the coupling rings on the tubs of a production line of laundry washing machines fully automated.
  • the invention simplifies the manufacture and mounting of these rings, while greatly reducing the production cost.
  • reference numeral 1 generally designates a tub of a laundry washing machine, comprising one element 2 with a substantially cup-like shape and a disk 3 which covers the mouth of the cup-shaped element at its front and has a central aperture 4 for the introduction of the laundry.
  • the elements 2, 3 At their coupling edges, the elements 2, 3 have two circumferential flanges 2a, 3a, between which there is interposed a sealing strip 5.
  • the two flanges 2a, 3a are connected to each other by a split coupling ring 6 which may be of any known type.
  • the drawings show, by way of example, a coupling ring 6 of the type forming the subject of European patent EP-B-0 210 143.
  • the method according to the invention may be adopted also with coupling rings of a type different from that shown in the drawings, as well as with a tub structure also different from that shown, in which for instance the coupling flanges are provided in an intermediate plane spaced from both the end faces of the tub or at the rear face, rather than at the front face of the tub.
  • the coupling ring 6 is constituted by a channel-like profile element (see figure 2) of metal material, having two side wings 7 and a central bottom wall 8 which define a substantially V-shaped cross-section with its cavity facing towards the ring axis.
  • the ring has two end portions 9 which are permanently deformed outwardly in a radial direction, with respect to the adjacent part of the ring, with an aperture 10 formed in the portion of the bottom wall 8 which connects each offset end portion 9 to the adjacent part of the ring.
  • each aperture 10, along with the cavity of the offset portion 9 defines a passage for engagement of a clamping tangential bolt (not shown in figure 2).
  • the coupling ring 6 is initially provided on the two juxtaposed flanges 2a, 3a, after that the two ends 9 of the ring are moved towards each other by an auxiliary tool, which may be for instance of the type shown in figures 3, 4. Only after that the ring has been clamped above the flanges after that the ring has been clamped above the flanges 2a, 3a by said auxiliary tool, by moving the two ends 9 to positions close to each other, the clamping bolt is applied through the facing apertures of the two offset end portions 9 and is then clamped in order to hold the ring in the deformed closed condition.
  • an auxiliary tool which may be for instance of the type shown in figures 3, 4.
  • the auxiliary tool used to cause the two ends 9 of the ring to move towards each other comprises two jaws 11, 12 respectively fixed by screws 13, 14 to a plate 15 connected by nuts 16 to the stem 17 of a hydraulic cylinder 18, and to the body 19 of cylinder 18.
  • the plate 15 is further guided on a cylindrical column 20 which engages respective bushes 21, 22 supported by plate 15 and the plate constituting jaw 12.
  • the hydraulic cylinder 18 is displaceable between an extended condition (figure 3), corresponding to the spaced apart condition of the two ends 9 of the coupling ring 6, and a retracted condition (figure 4) in which the ends 9 of the coupling ring 6 are close to each other.
  • the jaws 11, 12 have lower ends 11a, 12a adapted to come into engagement with abutment surfaces 11b, 12b formed adjacent to the ends of the ring, so as to be able to push said ends towards each other when the hydraulic cylinder 18 is moved from the extended condition shown in figure 3 to the retracted condition shown in figure 4.
  • the auxiliary tool can be opened and raised with respect to the ring.
  • the unit constituted by the tub with the ring mounted thereon can be moved forwardly and a new tub is brought and positioned below the apparatus for mounting the coupling ring.
  • the apparatus can then be lowered again in the opened condition shown in figure 3, and then closed to cause the ends of the new coupling ring to move towards each other, as already described above.
  • auxiliary tool illustrated herein is given purely by way of example, and that any other assembling structure (e.g. a toggle-type device) can be used.
  • the basic concept of the present invention is anyhow that of providing a tool which is able to cause the two ends of providing a tool which is able to cause the two ends of the coupling ring to move towards each other once the ring has been positioned above the peripheral flanges of the tub of the laundry washing machine, so that the clamping tangential bolt is not used to cause this movement, but simply to hold the ring in the closed condition, once it has been brought in this condition by said auxiliary tool.
  • the auxiliary tool is operated only once, whereupon the clamping bolt is tightened.
  • the auxiliary tool is operated a second time, to move further the two ends of the ring towards each other, so as to cause a simultaneous lowering of the load on the screw.
  • the bolt can be tightened again until reaching again a given load, and this alternated operation of the auxiliary tool and the bolt can be repeated again a number of times until reaching the desired clamping of the ring. In this manner, a very strong clamping of the ring can be obtained, while the bolt is never subjected to a stress greater than an admissible predetermined value.
  • the method is applicable to coupling rings of any type, also different from that shown by way of example in the annexed drawings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Claims (6)

  1. Méthode d'assemblage d'une bague d'accouplement divisée en deux (6) sur deux brides périphériques juxtaposées (2a, 3a) de deux éléments (2, 3) constituant le tuyau (1) d'une machine à laver le linge, ladite bague (6) étant constituée d'un profilé creux, plié dans un anneau, réalisé en métal, ayant deux ailettes latérales (7) et une paroi inférieure centrale (8) qui définissent une section transversale substantiellement en forme de C, avec ses cavités tournées en direction des axes de la bague (6) ; ledit profilé creux (6) étant formé de passages respectifs (10) pour l'introduction d'un boulon tangentiel de serrage (23, 24) à ses deux extrémités (9) adjacentes,
    caractérisée par le fait qu'après que la bague (6) ait été placée sur lesdites brides (2a, 3a), et avant d'être montée à travers lesdits passages (10) réalisés dans les deux extrémités adjacentes (9) de la bague (6), les deux extrémités (9) de la bague (6) sont déplacées l'une en direction de l'autre en introduisant un outil auxiliaire (11, 12, 18) pour ce, jusqu'à atteindre une condition déformée de la bague (6), ledit boulon étant ensuite seulement monté à travers lesdits passages (10) et serré afin d'éviter que lesdites extrémités (9) ne s'éloignent l'une de l'autre.
  2. Méthode selon la revendication 1, caractérisée par le fait que ledit outil auxiliaire comprend une paire de griffes (11, 12) pouvant être déplacées entre une condition d'ouverture et une condition de fermeture par un vérin hydraulique (18), adapté pour engager les extrémités respectives (9) de la bague d'accouplement (6) de façon à pousser ces extrémités l'une vers l'autre.
  3. Méthode selon la revendication 2, caractérisée par le fait que lesdites griffes (11, 12) sont munies d'un dispositif de chargement et de guidage automatique de la vis (23) et du boulon (24) constituant ledit boulon de serrage.
  4. Méthode selon l'une des revendications susmentionnées, caractérisée par le fait que la bague d'accouplement (6) est de type comprenant des parties finales déportées (9) radialement déformées vers l'extérieur par rapport aux parties adjacentes de la bague d'accouplement (6) et ayant des passages (10) pour pouvoir introduire le boulon de serrage.
  5. Méthode selon la revendication 1, où ledit outil auxiliaire n'est utilisé qu'une seule fois, après quoi le boulon de serrage (23, 24) est serré.
  6. Méthode selon la revendication 1, où ledit outil auxiliaire (11, 12, 18) et le boulon de serrage (23, 24) sont utilisés alternativement jusqu'au vissage complet de la bague.
EP97830045A 1996-04-09 1997-02-07 Procédé de montage d'un anneau de couplage pour cuve de machine à laver Expired - Lifetime EP0801163B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO960274 1996-04-09
IT96TO000274A IT1286709B1 (it) 1996-04-09 1996-04-09 Procedimento per il montaggio di un anello aperto di giunzione su due flange periferiche giustapposte di due elementi costituenti la vasca

Publications (3)

Publication Number Publication Date
EP0801163A2 EP0801163A2 (fr) 1997-10-15
EP0801163A3 EP0801163A3 (fr) 1998-01-21
EP0801163B1 true EP0801163B1 (fr) 1999-06-02

Family

ID=11414540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97830045A Expired - Lifetime EP0801163B1 (fr) 1996-04-09 1997-02-07 Procédé de montage d'un anneau de couplage pour cuve de machine à laver

Country Status (4)

Country Link
EP (1) EP0801163B1 (fr)
DE (1) DE69700246T2 (fr)
ES (1) ES2131989T3 (fr)
IT (1) IT1286709B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3059061A1 (fr) 2015-02-20 2016-08-24 Mondi Consumer Packaging Technologies GmbH Procede de recyclage de plastique a partir d'un sac d'emballage en film, sac d'emballage en film et bande composite de film destinee a fabriquer un sac d'emballage en film
EP3168169A1 (fr) 2015-11-13 2017-05-17 Mondi Consumer Packaging Technologies GmbH Sachet plastique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2296048A1 (fr) * 1974-12-24 1976-07-23 Thomson Brandt Machine a laver le linge a tambour
FR2355943A1 (fr) * 1975-11-18 1978-01-20 Thomson Brandt Machine a laver le linge, a tambour
IT8553609V0 (it) * 1985-07-19 1985-07-19 Lemp S N C Di Piani G E Sasso Anello aperto di giunzione partico larmente per il collegamento delle flange periferiche dei due elementi costituenti la vasca di una macchina lavabiancheria
ATE157715T1 (de) * 1993-06-17 1997-09-15 Capricorno Srl Ring zum verbinden zweier teile eines waschmaschinenbehälters

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3059061A1 (fr) 2015-02-20 2016-08-24 Mondi Consumer Packaging Technologies GmbH Procede de recyclage de plastique a partir d'un sac d'emballage en film, sac d'emballage en film et bande composite de film destinee a fabriquer un sac d'emballage en film
DE102015102471A1 (de) 2015-02-20 2016-08-25 Mondi Consumer Packaging Technologies Gmbh Folienverpackungsbeutel sowie Folienverbundbahn zur Herstellung eines Folienverpackungsbeutels
EP3168169A1 (fr) 2015-11-13 2017-05-17 Mondi Consumer Packaging Technologies GmbH Sachet plastique

Also Published As

Publication number Publication date
EP0801163A3 (fr) 1998-01-21
DE69700246T2 (de) 1999-12-02
ITTO960274A0 (fr) 1996-04-09
EP0801163A2 (fr) 1997-10-15
ES2131989T3 (es) 1999-08-01
DE69700246D1 (de) 1999-07-08
ITTO960274A1 (it) 1997-10-09
IT1286709B1 (it) 1998-07-17

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