EP2119969A2 - Porte de four - Google Patents

Porte de four Download PDF

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Publication number
EP2119969A2
EP2119969A2 EP09159999A EP09159999A EP2119969A2 EP 2119969 A2 EP2119969 A2 EP 2119969A2 EP 09159999 A EP09159999 A EP 09159999A EP 09159999 A EP09159999 A EP 09159999A EP 2119969 A2 EP2119969 A2 EP 2119969A2
Authority
EP
European Patent Office
Prior art keywords
door
upright
hinge
guide means
pivoted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09159999A
Other languages
German (de)
English (en)
Other versions
EP2119969B1 (fr
EP2119969A3 (fr
Inventor
Giuseppe Perticara'
Riccardo Pelizzoli
Luciano Antonini
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.)
Whirlpool EMEA SpA
Original Assignee
Indesit Co SpA
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 Indesit Co SpA filed Critical Indesit Co SpA
Priority to PL09159999T priority Critical patent/PL2119969T3/pl
Priority to EP14199884.9A priority patent/EP2905543B1/fr
Publication of EP2119969A2 publication Critical patent/EP2119969A2/fr
Publication of EP2119969A3 publication Critical patent/EP2119969A3/fr
Application granted granted Critical
Publication of EP2119969B1 publication Critical patent/EP2119969B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/02—Doors specially adapted for stoves or ranges
    • F24C15/023—Mounting of doors, e.g. hinges, counterbalancing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
    • E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
    • E05F1/12—Mechanisms in the shape of hinges or pivots, operated by springs
    • E05F1/1246—Mechanisms in the shape of hinges or pivots, operated by springs with a coil spring perpendicular to the pivot axis
    • E05F1/1269—Mechanisms in the shape of hinges or pivots, operated by springs with a coil spring perpendicular to the pivot axis with a traction spring
    • E05F1/1276—Mechanisms in the shape of hinges or pivots, operated by springs with a coil spring perpendicular to the pivot axis with a traction spring for counterbalancing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/20—Combinations of elements
    • E05Y2800/22—Combinations of elements of not identical elements of the same category, e.g. combinations of not identical springs
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/30—Application of doors, windows, wings or fittings thereof for domestic appliances
    • E05Y2900/308—Application of doors, windows, wings or fittings thereof for domestic appliances for ovens

Definitions

  • the present invention relates to an oven door, in particular a door for household ovens, according to the preamble of the first claim.
  • Household ovens are usually equipped with a heated chamber (obtained in a muffle) which opens outwards and can be closed by a door: the latter typically comprises a perimetric frame structure that supports at least one thermal glass pane.
  • the door can be turned relative to the muffle through hinges that support it and guide its motion as the oven chamber is being opened or closed.
  • hinges exist, among which two main categories can be ideally identified within the field of household ovens: fixed-fulcrum type and variable-fulcrum type.
  • variable-fulcrum hinges are described in the Italian patents granted under numbers 01238235 and 1225059 to NUOVA STAR S.r.L. and under number 1082602 to VANINI ET AL., which comprise an articulated quadrilateral for the rototranslation of the door; they also comprise a door guide means consisting of a curved arm which is rotatable relative to the door frame (to which it is pivoted) and which collaborates through a spring with a striker head secured to the oven muffle, thus slowing down or stopping the turning door.
  • a fixed-fulcrum hinge is described in patent EP 0 737 792 to C.M.I. S.r.L.; it comprises an L-shaped bracket jutting out from the oven muffle towards the door, which is pivoted thereto (thus having a fixed fulcrum); in this case, the hinge guide means consist of a simple spring and a straight arm, but more in general they may nonetheless consist of the above-mentioned curved arm or, as will be detailed below, of two countersprings cooperating with a striker roller.
  • Guide means are also known which are driven by an electric motor, e.g. as described in the Italian patent application IT 1210509 by S.T.A.R. S.p.A., wherein said means comprise a toothed curved arm cooperating with a toothed striker head driven by an electric motor, thus allowing the door to open or close automatically.
  • the hinges used for household oven doors comprise a mounting section to which both the guide means and the actual hinge (whether an articulated quadrilateral or a fixed pivot) are pivoted; in its turn, the mounting section is secured to the door frame by means of screws.
  • Fig. 1 shows an example of a variable-fulcrum hinge in accordance with the current state of the art: it can be seen that both the articulated quadrilateral (hinge) and the curved arm with the respective counterspring (guide means) are pivoted to the mounting section, which is secured to the door frame upright by means of a fastening screw; on the side farther from the oven muffle, the upright is closed by a trimming cover, which is typically secured thereto through suitable joints.
  • both the spring and the straight arm will be pivoted to a mounting section, which will then be secured to the door frame structure by means of screws.
  • the mounting section allows the hinge and the guide means to be assembled together and then secured to the door by means of screws, on the other hand it suffers from a few drawbacks.
  • a further drawback is determined by the fact that both the hinge and the guide means are housed in the same mounting section and are not therefore easily accessible: should the hinge or the guide means fail, it will be necessary to replace both by removing the section from the frame; the rather easy replacement procedure is thus counterbalanced by the fact that also properly operating parts must necessarily be replaced along with the defective one.
  • Yet another drawback is caused by the fact that the door upright, in order to withstand the loads transferred thereto by the hinge while at the same time housing it, is often manufactured as shown in Fig. 1 , i.e.
  • the trimming cover does not normally perform any structural tasks, except for acting as a stop for holding the door glass pane in position; it follows that substantially all the load is carried by the upright sections, which must therefore be sized appropriately.
  • the technical problem at the basis of the present invention is to provide a household oven door having such structural and functional features as to overcome the aforementioned drawbacks.
  • the solution to this problem is to eliminate the mounting section and to pivot both the hinge and the guide means directly to the upright of the frame structure of the oven door; to this end, the upright is manufactured by using a tube having a substantially square or rectangular cross-section.
  • this also improves the section modulus without increasing the dimensions of the upright, while preventing any deformation thereof.
  • the frame may be made of metal (aluminium, painted sheet-steel, stainless steel or the like), thermosetting plastic material or the like.
  • the masks may be made of plastic or metal and, for example, they may be manufactured in the form or drawn panels.
  • FIG. 2 there is shown an oven comprising a muffle 1 that contains a heated chamber 2 which can be closed in front by means of the door 3, which comprises a thermal glass pane 4 that allows to visually check the foods being cooked in the chamber 2; the door 3 is shown in the open condition, and closes the chamber by rotating in the direction indicated by the arrow.
  • the door 3 is equipped with per se known hinges like those described above, whether having a fixed or variable fulcrum, which are typically mounted on both sides of the door 3.
  • the door 3 has a perimetric frame 13, shown schematically in Fig. 3 , which consists of two side uprights 14, 15 joined together by two crosspieces 16 and 17, thus forming a substantially rectangular frame with a housing 40 for the glass pane 4.
  • the side uprights and the crosspieces are section pieces screwed, riveted or welded together to form the frame structure; alternatively, they may belong to a frame structure obtained from two rectangular masks with a centre hole (for providing the housing 40 for the glass pane 4) coupled together shell-wise, so that assembling the door frame becomes extremely quick and easy.
  • the side uprights 14 and 15 are boxed channels having a substantially square or rectangular cross-section, to which both the hinge and the guide means are pivoted; as will be described more in detail hereafter, the uprights may be obtained by using two different solutions: in two pieces 154 or in one piece 155. More specifically, with reference to the embodiment of Fig.
  • the upright 154 can be broken up into two parts 15A and 15B, which are assembled together by interference fit.
  • the variable-fulcrum hinge 7 comprises two arms 7A and 7B connected to the lever 7C, which is linked to the oven muffle 1 (in a known manner), thus allowing the door to rototranslate; the guide means consists of the curved arm 8 that cooperates (in a known manner) with the counterspring 9 for the purpose of adjusting the door opening speed.
  • the arms 7A and 7B, the free end of the spring, and the curved arm 8 are all directly pivoted to the second upright part 15B by means of the pins 30, 31, 32 and 33, respectively.
  • the latter are inserted into respective holes obtained in the two fins 15B' and 15B" of the second upright part 15B; the latter has a "C" cross-section to be coupled to the first part 15A, also having a "C” cross-section and featuring two fins 15A' and 15A" that are coupled by interference fit to the fins 15B' and 15B", thereby forming the square tube of the upright 154.
  • the two pieces may be each belong to a respective mask, so that the actual frame structure is obtained by joining both masks together; in this respect, it is worth mentioning that the crosspieces as well are divided into two parts, one belonging to a mask and the other belonging to the other mask, which are coupled together to produce the closed frame.
  • first part 15A of the upright 154 has a side fin 15A''' extending towards the frame aperture 40, thus acting as a locator for the glass pane 4 of the door.
  • the pins 30, 31, 32 and 33 are simple cylindrical pins to be riveted after having been inserted into the respective holes, thus being held in position.
  • the assembly procedure requires that the hinge and the guide means are first secured to the second upright part 15B, and then the first upright part 15A is coupled to the second part 15B to form the two-piece upright 154.
  • the forces acting upon the pins are discharged directly onto the door frame; in this regard, it should be observed that, while the fastening screws used in the prior art as shown in Fig. 1 are subject to traction, the pins applied directly to the upright discharge the forces onto both side fins 15B' and 15B" of the second upright part 15B, which are further strengthened by their interference fit with the fins 15A' and 15A'' of the first upright part 15A, resulting in a stronger overall structure.
  • the pins 30, 31, 32 and 33 may be substituted with screws or threaded pins, thus making it easier to replace any broken parts of the hinge or guide means: in such a case, in fact, the pin that secures the defective part can simply be unscrewed and then the part can be replaced without having to replace the whole hinge and guide means (as required by prior-art solutions).
  • the upright 155 is manufactured in one piece, as shown in Fig. 5 : in this case, the pins 30, 31, 32 and 33 are inserted in holes provided on the two opposite sides of the square-section upright; the assembly procedure will thus require that the hinge and guide means be inserted into the upright from below and then secured through the pins 30, 31, 32 and 33, which shall then be riveted in position.
  • riveted pins may be replaced with screws or threaded pins which will make the hinge and guide means more easily disassemblable.
  • a guide means driven by an electric motor and comprising for this purpose a toothed curved arm 80, as shown in Figs. 6 and 7 , wherein the same reference numerals designate the same parts, which will not be described any further for simplicity's sake.
  • the upright 154 consists of two parts 15A and 15B which are assembled together by interference fit, thus forming an upright having a substantially square cross-section, whereas in Fig. 7 the upright 155 is manufactured as one piece.
  • the upright 14 may be provided in the same manner.
  • FIG. 4 to 7 illustrate different embodiments of a variable-fulcrum hinge
  • Figs. 8 and 9 show two embodiments of a fixed-fulcrum hinge 70, a detailed sectional view of which is provided in Fig. 10 .
  • the simplest type of fixed-fulcrum hinge has been chosen as an example, which consists of an L-shaped bracket 71 pivoted to the door frame through a pin 34.
  • the guide means consist of the arm 8' that holds in position the movable pin 38 with which the two countersprings 9' and 9'' cooperate for the purpose of guiding the door opening movement through the roller 72, which discharges the force onto the bracket 71 by following the profile thereof as the door is being opened; to this end, the spring 9' is secured to the frame by means of the pin 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)
  • Hinges (AREA)
EP09159999.3A 2008-05-15 2009-05-12 Porte de four Not-in-force EP2119969B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL09159999T PL2119969T3 (pl) 2008-05-15 2009-05-12 Drzwiczki do piekarnika
EP14199884.9A EP2905543B1 (fr) 2008-05-15 2009-05-12 Porte de four

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000363A ITTO20080363A1 (it) 2008-05-15 2008-05-15 Sportello per forni

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP14199884.9A Division EP2905543B1 (fr) 2008-05-15 2009-05-12 Porte de four

Publications (3)

Publication Number Publication Date
EP2119969A2 true EP2119969A2 (fr) 2009-11-18
EP2119969A3 EP2119969A3 (fr) 2013-04-24
EP2119969B1 EP2119969B1 (fr) 2014-12-24

Family

ID=40303092

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14199884.9A Not-in-force EP2905543B1 (fr) 2008-05-15 2009-05-12 Porte de four
EP09159999.3A Not-in-force EP2119969B1 (fr) 2008-05-15 2009-05-12 Porte de four

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14199884.9A Not-in-force EP2905543B1 (fr) 2008-05-15 2009-05-12 Porte de four

Country Status (4)

Country Link
EP (2) EP2905543B1 (fr)
ES (1) ES2533363T3 (fr)
IT (1) ITTO20080363A1 (fr)
PL (1) PL2119969T3 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1210509B (it) 1983-12-19 1989-09-14 Trevigiana Apparecchi Riscald Forno da cottura.
IT1225059B (it) 1988-09-09 1990-11-02 Nuova Star Srl Cerniera a struttura perfezionata del tipo particolarmente adatta per l'articolazione amovibile degli sportelli dei forni delle cucine di cottura
IT1238235B (it) 1990-01-30 1993-07-12 Nuova Star Srl Cerniera in due parti separabili perfezionata.
EP0737792A1 (fr) 1995-04-12 1996-10-16 C.M.I. S.r.l. Dispositif d'articulation en particulier pour la porte d'un appareil électroménager ou similaire

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955865A (en) * 1974-11-04 1976-05-11 General Electric Company Oven door counterbalance system
FR2557273B1 (fr) * 1983-12-22 1986-04-11 Europ Equip Menager Dispositif d'articulation et d'equilibrage d'une porte d'un appareil de cuisson
US5025776A (en) * 1990-05-18 1991-06-25 The Stanley Works Door mounted hinge for oven doors and the like
IT1258145B (it) * 1992-09-14 1996-02-20 Cmi Cerniere Mecc Ind Perfezionamenti alle cerniere per l'articolazione delle portelle ad asse orizzontale in particolare per cucine o lavastoviglie.
EP0632180B1 (fr) * 1993-07-02 1996-09-25 NUOVA STAR S.r.l. Charnière pour mettre en contrainte une porte contre une structure de support
IT1276730B1 (it) * 1995-06-15 1997-11-03 Faringosi Hinges Srl Cerniera per sportelli di elettrodomestici, mobili e simili dotata di mezzi separati ad azione combinata per l'equilibratura dello
ATE339655T1 (de) * 2002-12-17 2006-10-15 Nuova Star Spa Türscharnier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1210509B (it) 1983-12-19 1989-09-14 Trevigiana Apparecchi Riscald Forno da cottura.
IT1225059B (it) 1988-09-09 1990-11-02 Nuova Star Srl Cerniera a struttura perfezionata del tipo particolarmente adatta per l'articolazione amovibile degli sportelli dei forni delle cucine di cottura
IT1238235B (it) 1990-01-30 1993-07-12 Nuova Star Srl Cerniera in due parti separabili perfezionata.
EP0737792A1 (fr) 1995-04-12 1996-10-16 C.M.I. S.r.l. Dispositif d'articulation en particulier pour la porte d'un appareil électroménager ou similaire

Also Published As

Publication number Publication date
ITTO20080363A1 (it) 2009-11-16
EP2905543A1 (fr) 2015-08-12
EP2905543B1 (fr) 2018-03-28
EP2119969B1 (fr) 2014-12-24
ES2533363T3 (es) 2015-04-09
PL2119969T3 (pl) 2015-08-31
EP2119969A3 (fr) 2013-04-24

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