FR2649730A1 - WASHING MACHINE WITH DRUM POSITIONING - Google Patents

Abstract

When the body door is opened, an ELAM electromagnet is activated to be driven by an ERG pin placed on the drum pulley; the trigger DET pivots and activates the trigger GAC which releases an EFR brake whose pad PAT comes to bear on the drum drive belt COU. An MTH heat engine is provided to reset the system.

Description

DESCRIPTION

  WASHING MACHINE WITH DRUM POSITIONING ".

  The present invention relates to a machine for

  top loading washing with automatic means

  ticks for, when opening the body door, a) activate the motor which, with a belt and a pulley, drives the drum in rotation to, b) allow detection of the passage of the drum door in the position loading / unloading and, in this case, c) stop the said motor, and keep the drum in the

said position.

  The aim is to make it easier for the housewife who, when she opens the body door, goes

  thus automatically find the drum door in the po-

  adequate sition; thus it will no longer have to turn the drum by hand, this maneuver being sometimes painful when the machine is full of wet laundry and presenting the risk of

pinch your fingers.

  Such a machine is described in the French patent published under No. 2,569,731. In this document, the positioning device appears to be quite complicated because it has a large number of moving parts and complex shapes. The object of the present invention is to provide a

  simple and reliable positioning device.

  According to the present invention, such a washing machine is remarkable in that the drum is held in position by means of a pad brake which, under the action of a

  radial force, bears on said belt for

  ner and thus immobilize the drum via the pulley. So we take advantage of the fact that a material

  anti-slip, that of the belt, already exists in the ma-

  china for training the drum, and it is also used for holding the drum in position with the addition

a shoe brake.

  When the door is opened, the drum is

  dragged at a relatively slow speed, if only for safety reasons, and as soon as the passage was detected

  adequate position, the device according to the invention is noted

  quable in that said radial force is exerted on the pad brake by a braking spring previously bandaged in the armed position and then released by a trigger and a trigger,

  said trigger being actuated by said detection of the step

  of the drum door in the loading / unloading position

loading.

  Thus the drum, despite its inertia, is immediate-

  stuck in the correct position.

  Preferably, the washing machine includes a heat engine for bandaging said brake spring and,

thus, arm the said trigger.

  Indeed, a brutal braking spring implies a fairly significant effort to bandage it over a short race; a heat engine is specially well suited for this

function.

  Advantageously, said detection is carried out by means of - on the one hand a lug placed on the drum pulley, - on the other hand an electromagnet with plunger core fixed on the trigger, said electromagnet being activated through the opening of the body door and arranged so that, in this case, its

  plunger core is driven by said lug.

  Thus the pulley is very little modified since only

a lug is added to it.

  It is also notably advantageous that the arrangement

  detection is dissociated from the braking device of the

  fact that the forces brought into play have different values.

  The present invention will be well understood with the

  description of a nonlimiting exemplary embodiment illustrated

by:

  FIG. 1 which represents the device in the rear position

  born, 'Figure 2 which shows the device in the braking position, Figure 3 which shows a variant of the expansion device. In FIG. 1, the pulley POU for driving the

  drum has an ERG lug properly positioned in relation to

  port to the drum door not shown.

  The other elements described below are fitted

  on the tank of the washing machine; this is necessary in particular-

  ment in the general case today where the tank is mounted flexible in the body of the machine due to vibrations during

spinning.

  The detection element is an ELAM electromagnet, the NOY plunger core of which comes radially on

  the trajectory of the ERG lug when the electromagnet is activated

tived.

  The electromagnet is fixed on the trigger DET la-

  which is a mechanical part pivotally mounted around the expansion axis ADE; the trigger position is determined

  by an RDE rebound return spring and a stop not re-

  presented. A PROD prominence of the trigger is in contact with the trigger GAC which is pivotally mounted around the axis of trigger AGA; the trigger has the function of retaining

  in the armed position the EFR brake assembly; to do this the ga-

  chette has a BEC spoiler on which the brake assembly bears under the effect of the RFR brake spring; all

  brake is movable along the AFR axis which is radially directed

  also towards the center CP of the pulley; on the side of the Fplie the brake assembly is provided with a PAT brake pad which, under

  the action of the RFR spring, is supported on the drive belt

COU.

  Figure 1 also includes the following elements: - an IGA trigger switch which cuts the current

  when the trigger leaves its armed position.

2649730-

  - an electrical circuit CE which, when the door

  rosserie is open, let the current flow through the IGA trigger switch to power both

  the ELAM electromagnet and the MOT drive motor of the drum

bour.

  - an MTH heat engine which, when powered,

  pushes with its movable finger DG (dashed line in Figure 1) the EFR brake assembly by banding the RFR spring until the BEC spoiler of the trigger comes to block the brake assembly; the operation of the MTH motor is for example based on the expansion of a wax when it is heated. Such an engine is manufactured for example by the company ELTER in Casale

  (Italy) under the reference 100281.

  In FIG. 2, the operating mode of the device

  positioning sitive appears by comparison with the fig-

  re 1, the two figures include the same elements with the

  same marks, only the positions are different.

  When the housewife opens the body door, the MOT motor is powered to turn at relatively high speed

  slow and in a direction such that the pulley turns, such that

  shown in the figure, clockwise

  be; simultaneously the ELAM electromagnet is energized and the NOY plunger core is placed in the path of the ERG lug

pulley.

  When the lug comes into contact with the core, the trigger is rotated counterclockwise

  around its axis ADE; at that time the prominence PROD resulted in

  in turn does the trigger rotate clockwise

  those of a watch which has the effect:

  a) switch off the IGA switch and therefore no longer supply

  ter neither the electromagnet nor the motor b) to release the EFR brake assembly which under the action of the RFR spring comes to bear with its PAT shoe on the COU belt, which immobilizes the drum in the position

desired.

  The maintenance of the drum is only mechanical and positive, it is therefore preserved even if the washing machine is not

no longer supplied with current.

  The heat engine can be put into action to reset the system, either when the body door is closed during washing, or at the start of each closed door program; as soon as the heat engine stops being supplied with current, it cools, the movable finger takes its place, and the system is ready to function again since the trigger and the trigger have resumed their

  Figure 1 places under the action of the return springs.

  In most current machines, the body door is provided with a safety switch, it is advantageous that this same switch also constitutes the means

  body door opening detection.

  The system as described above does not work

  only for one direction of rotation of the drum; figure 3 my-

  be a variant arrangement of the trigger fitted with its electromagnet which allows satisfactory operation for both directions of rotation: the axis of rotation of the trigger

  ADE is positioned on the same axis as the NOY nucleus, and the

  tent has two PRODA and PRODB prominences. So

  regardless of the direction of rotation of the drum S1 or S2, the

  tent always drives the GAC trigger in the direction of arrow F.

Claims (7)

  1. Top loading washing machine   both automatic means for, when opening the body door, a) activate the motor which, with a belt and a pulley, drives the drum in rotation to, b) allow the detection of the passage of the drum door -in the loading / unloading position and, in this case, c) stop said motor, and maintain the drum in said position, characterized in that, the drum is kept in position at   means of a shoe brake which, under the action of a radiant force   the, comes to bear on said belt to brake and immo-   thus stabilize the drum via the pulley.   2. Washing machine according to claim 1 charac-   in that the said radial force is exerted on the brake   with pad by a braking spring previously bandaged in po-   armed position then released by a trigger and a trigger, said trigger being actuated by said passage detection   of the drum door in the loading / unloading position gement.   3. Washing machine according to claim 2 charac-   sée in that, it includes a heat engine to bandage   said brake spring and, thus, arm said trigger.   4. Washing machine according to claim 2 or 3-   characterized in that, said detection is carried out by means of - on the one hand a lug placed on the pulley of the drum, - on the other hand an electromagnet with plunger core fixed on the trigger, the so-called electromagnet being activated by the opening of the body door and arranged so that, in this case, its   plunger core is driven by said lug.   5. Washing machine according to claim 4 charac-   sée in that, the said plunger core is driven by the said   lug regardless of the direction of rotation of the drum.   6. Washing machine according to claim 4 or 5   characterized in that, said trigger triggers an interrup-   electric tor for, in armed position, validate the activation of said electromagnet and the motor, and for, in position   braking, stop said activation.   7. Washing machine according to any one of the claims.   previous cations whose body door has a   safety switch characterized in that, said inter-   safety switch is also used as a safety switch   implementation of said positioning means.