EP0179409A2 - Dispositif de sécurité pour chaise pliante - Google Patents

Dispositif de sécurité pour chaise pliante Download PDF

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Publication number
EP0179409A2
EP0179409A2 EP85113228A EP85113228A EP0179409A2 EP 0179409 A2 EP0179409 A2 EP 0179409A2 EP 85113228 A EP85113228 A EP 85113228A EP 85113228 A EP85113228 A EP 85113228A EP 0179409 A2 EP0179409 A2 EP 0179409A2
Authority
EP
European Patent Office
Prior art keywords
plate
chair structure
foldable chair
structure according
extensions
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.)
Withdrawn
Application number
EP85113228A
Other languages
German (de)
English (en)
Other versions
EP0179409A3 (fr
Inventor
Carlo Lerolin
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.)
LEROLIN SpA
Original Assignee
LEROLIN 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 LEROLIN SpA filed Critical LEROLIN SpA
Publication of EP0179409A2 publication Critical patent/EP0179409A2/fr
Publication of EP0179409A3 publication Critical patent/EP0179409A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/28—Folding chairs with flexible coverings for the seat or back elements
    • A47C4/42—Folding chairs with flexible coverings for the seat or back elements having a frame made of metal
    • A47C4/44—Folding chairs with flexible coverings for the seat or back elements having a frame made of metal with legs pivotably connected to seat or underframe
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/04—Folding chairs with inflexible seats
    • A47C4/18—Folding chairs with inflexible seats having a frame made of metal
    • A47C4/20—Folding chairs with inflexible seats having a frame made of metal with legs pivotably connected to seat or underframe

Definitions

  • This invention relates to afoldable chair structure incorporating a safety device.
  • foldable chairs which comprise essentially a seat frame extending in a closed loop, to the sides whereof the chair's front legs and rear legs are pivotally connected.
  • armrests To extensions of the front legs, armrests are pivoted which are, in turn, connected pivotally to a middle portion of the backrest frame, the latter being pivoted on extensions of the rear legs.
  • braces connecting a point of the backrest frame to the pivotal connection area between the seat frame and front legs.
  • the seat and backrest are defined by a fabric or plastics sheet which is connected with its middle portion to springs associated with the rear portion of the seat frame.
  • Such prior foldable chairs have the advantage that they can be reduced to a very compact folded size, since the front and rear legs can be folded down, to an interleaved condition, against the seat frame while, by virtue of the above-described linkages, the backrest frame can likewise be brought to overlie the seat frame.
  • foldable chair have shown to be quite convenient and functional but are liable to accidentally collapse, with obvious potential hazard for their users, if handled improperly, and typically if a force is exerted on a front leg tending to cause the rear legs to swing in to a folded condition of the chair as the user generally applies his/her full weight to the front portion of the chair and the chair only rests on its front legs.
  • Another object of this invention is to provide a foldable chair structure incorporating a safety device , which owing to its peculiar construction, can give full assurance of being reliable and safe to use.
  • a not least object of the invention is to provide a foldable chair structure incorporating a safety device, which can be readily manufactured from commercially available elements and materials and be highly competitive from a purely economical standpoint.
  • a foldable chair structure incorporating a safety device comprising a closed loop seat frame to the sides whereof there are pivotally connected front end rear legs, extensions of siid front legs being pivotally connected to armrests, pivoted at the other ends thereof to a middle portion of a backrest frame, said backrest frame being connected pivotally to extensions of said rear legs, characterized in that it comprises locking means effective to prevent the chair from accidentally collapsing and including at least one oscillable plate journalled to a middle portion of said backrest frame and releasably engageable by contact with the free ends of the rear leg extensions to prevent pivoting to a folded condition.
  • a foldable chair structure incorporating a safety device, secording to the invention comprises a seat frame, generally designated with the reference numeral 1, which is preferably a closed loop design of substantially quadrangular configuration, including two substantially parallel lateral portions 1a, 1b forwardly interconnected by a front piece 1c, and rearwardly interconnected by a rear portion 1d lying substantially parallel thereto.
  • the front legs 2a, 2b which, as is usual, comprise a tubular member folded to a substantially "U"-like configuration and defining a floor resting zone at an interconnection section 3, extending between said front legs 2a, 2b.
  • the rear legs 4a, 4b Inwardly of the seat frame 1, rearwardly at the lateral portions 1a, 1b thereof there are pivoted the rear legs 4a, 4b also formed from a bent tubular member defining a substantially "U"-like configuration, which further defines a floor resting zone at ite interconnecting section 5 extending between said rear legs 4a, 4b.
  • the upward extensions 7 of the front legs 2 are journalled at their uppermost ends to the anterior portions of substantially horizontal armrests 8 which are pivoted, at their rear ends, to the upright members 9a, 9b of the backrest frame, generally indicated at 10, which defines an inverted "U"-like member including a substantially horizontal portion 9o extending between the upper ends of the upright members 9.
  • the uprights 9 are journalled proximately to the upper extremities of the extensions 11 of the rear legs 4.
  • a connecting brace 15 formed preferably from plastics or other such suitable material, which is connected at its forward portion 15a between the point of pivotal connection of the front legs 2 to the seat frame 1 and at its rear portion 15b to a middle portion of the uprights 9 at the area thereof extending between the pivotal connection of the armrests 8 to the extensions 11 of the rear legs 9a, 9b.
  • the chair is then completed by partially covering the chair frame with a sheet, generally indicated at 16, which extends from the front piece 1c of the seat frame 1 to the horizontal portion 9c extending between the uprights 9 to define the seat 18 and backrest 19 and is connected, at the area joining the seat to the backrest, to springs 20 connected to the rear portion 1d of the seat frame 1.
  • a sheet generally indicated at 16, which extends from the front piece 1c of the seat frame 1 to the horizontal portion 9c extending between the uprights 9 to define the seat 18 and backrest 19 and is connected, at the area joining the seat to the backrest, to springs 20 connected to the rear portion 1d of the seat frame 1.
  • locking means are provided to prevent the chair from accidentally collapsing;
  • the locking means comprise an oscillable plate, indicated at 30, which is expediently journalled at a first end portion 30a thereof including a through hole 30b to the upright 9 at the area of pivotal connection to the brace 15 ( Figure 5).
  • That plate 30 has at a second end portion 30o thereof, a seat 31 which is adapted to engage with the free ends of the extension 11 of the rear legs, so as to form an abutment effective to prevent the chair from being folded down.
  • the plate 30 in order to be able to fold the chair, the plate 30 must be removed from its position of engagement and specifically the extension 11 must be released from its engagement with the abutment seat 31, before the rear leg can be pivoted in order to fold the chair.
  • the plate 30 will swing by gravity away from the extension 11 thereby uncoupling the engagement between the end of the extension 11 and the seat 31 and thus allowing the chair to be folded down.
  • a projection 36 is also expediently provided which i ⁇ also advantageously formed integral with the plate 30, protruding laterally therefrom at a side opposite to said side lug 35, thereby the projection 36 engages by contact with the uprights 9.
  • the plate 30 would be placed between the upright 9 and the brace 15.
  • a plate 40 could be alternatively provided inwardly of the brace 15.
  • the locking means preventing the plate from turning accidentally upward would comprise a bottom extension or protuberance 41 which is adapted to engage with the bottom portion of the brace 15, and the means preventing the plate 40 from turning downward would comprise a top extension or protuberance 42, expediently positioned proximately to the pivotal connection area or through hole 40a and being adapted for abutment engagement with the top portion of the brace 15, the bottom protuberance 41 and the top protuberance 42 both projecting laterally from the same side of the plate 40.
  • the plate 40 may be provided with a plurality of detents such aa a first detent seat 45 and a second detent seat 46, ( Figure 10), which are selectively engageable with the free ends of the extensions to provide different angular inclinations of the chair back 19 with respect to the seat 18 with the chair in its open condition.
  • a plurality of detents such as aa a first detent seat 45 and a second detent seat 46, ( Figure 10), which are selectively engageable with the free ends of the extensions to provide different angular inclinations of the chair back 19 with respect to the seat 18 with the chair in its open condition.
  • the folding chair of this invention is designed such that, when in the open condition, the plate, 30 or 40, will be caused by gravity to abut with its free end against the free end of the extension 11, thereby any force acting in the chair-folding direction would be resisted, since the rear legs are prevented from pivoting due to the engagement of the seat 31 or abutment detent 45,46 with the cited free end of the extension 11, ( Figure 4).
  • the invention achieves its objects, and in particular it should be stressed that through very simple means, such as those inoluding the plate journalled to the upright at the area of pivotal connection of the connecting brace, a high degree of safety is imparted to the chair, which can no longer accidentally fold down.
  • the plate mounting involves no special processing, since the plate is installed at a pivotal point of connection which is already conventionally provided on chairs of this type.
  • any materials, contingent shapes and dimensions may be used, so long as compatible with the specific application.

Landscapes

  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
EP85113228A 1984-10-25 1985-10-18 Dispositif de sécurité pour chaise pliante Withdrawn EP0179409A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2361484U 1984-10-25
IT2361484U IT8423614V0 (it) 1984-10-25 1984-10-25 Struttura di seggiolina pieghevole con dispositivo di sicurezza.

Publications (2)

Publication Number Publication Date
EP0179409A2 true EP0179409A2 (fr) 1986-04-30
EP0179409A3 EP0179409A3 (fr) 1987-01-14

Family

ID=11208589

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113228A Withdrawn EP0179409A3 (fr) 1984-10-25 1985-10-18 Dispositif de sécurité pour chaise pliante

Country Status (4)

Country Link
EP (1) EP0179409A3 (fr)
AU (1) AU4945685A (fr)
DK (1) DK487485A (fr)
IT (1) IT8423614V0 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5707105A (en) * 1996-12-03 1998-01-13 Liu; Lausan Chung Hsin Safety lock for a folding chair
US5947553A (en) * 1997-11-18 1999-09-07 Shin Yen Enterprise Co., Ltd. Folding chair
US10548402B1 (en) 2018-06-29 2020-02-04 Jacquelyn McCants Folding chair with a safety device

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB461701A (en) * 1935-09-14 1937-02-23 Frank Wattis Myatt Improvements relating to folding chairs
US2508607A (en) * 1946-04-10 1950-05-23 Heywood Wakefield Co Folding chair
US2541130A (en) * 1948-05-05 1951-02-13 Bridge Tables & Novelties Inc Folding chair
US2633183A (en) * 1950-05-19 1953-03-31 Glenn H Norquist Folding chair
US2812801A (en) * 1955-11-15 1957-11-12 Universal Converting Corp Collapsible chair
GB790308A (en) * 1954-11-03 1958-02-05 William Pope Chitty An improved folding chair
US2871921A (en) * 1956-05-22 1959-02-03 Arnold Fredric Collapsible folding chair
GB829937A (en) * 1958-06-23 1960-03-09 Antiference Ltd Folding furniture provided with a locking device
FR2096327A5 (fr) * 1970-06-26 1972-02-11 Heinz Kettler Metallware
GB1266702A (fr) * 1969-02-14 1972-03-15

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB461701A (en) * 1935-09-14 1937-02-23 Frank Wattis Myatt Improvements relating to folding chairs
US2508607A (en) * 1946-04-10 1950-05-23 Heywood Wakefield Co Folding chair
US2541130A (en) * 1948-05-05 1951-02-13 Bridge Tables & Novelties Inc Folding chair
US2633183A (en) * 1950-05-19 1953-03-31 Glenn H Norquist Folding chair
GB790308A (en) * 1954-11-03 1958-02-05 William Pope Chitty An improved folding chair
US2812801A (en) * 1955-11-15 1957-11-12 Universal Converting Corp Collapsible chair
US2871921A (en) * 1956-05-22 1959-02-03 Arnold Fredric Collapsible folding chair
GB829937A (en) * 1958-06-23 1960-03-09 Antiference Ltd Folding furniture provided with a locking device
GB1266702A (fr) * 1969-02-14 1972-03-15
FR2096327A5 (fr) * 1970-06-26 1972-02-11 Heinz Kettler Metallware

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5707105A (en) * 1996-12-03 1998-01-13 Liu; Lausan Chung Hsin Safety lock for a folding chair
US5947553A (en) * 1997-11-18 1999-09-07 Shin Yen Enterprise Co., Ltd. Folding chair
US10548402B1 (en) 2018-06-29 2020-02-04 Jacquelyn McCants Folding chair with a safety device

Also Published As

Publication number Publication date
DK487485D0 (da) 1985-10-24
EP0179409A3 (fr) 1987-01-14
IT8423614V0 (it) 1984-10-25
AU4945685A (en) 1986-05-01
DK487485A (da) 1986-04-26

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Inventor name: LEROLIN, CARLO