FR2614771A1 - FOLDING CHAIR WITH FOLDING BACKREST - Google Patents

Abstract

FOLDING CHAIR WITH FOLDING BACK ACCORDING TO A GENERAL FORMULA KNOWN ACCORDING TO WHICH THE U-SHAPED ELEMENTS OF THE BACKREST 2, THE FRONT FOOT 4 AND THE REAR FOOT 3 ARE HINGED TO THE REAR PART OF THE SEAT 1. THE PRESENT INVENTION PROPOSES A NEW ARRANGEMENT OF THE U-SHAPED ELEMENTS SO THAT WHEN THE CHAIR IS FOLDED, THE SEAT 1 IMMEDIATELY SURROUNDED ON THREE SIDES BY THE BACKREST 2 CONSTITUTES A THICK FLOOR, AND BELOW, THE FRONT FOOT 4 SURROUNDING THE REAR FOOT 3 CONSTITUTE A OTHER. THE MOUNTING OF THE U-SHAPED ELEMENTS AND THE SEAT CAN BE CARRIED OUT BY FIXING ON FLAT IRON JOINT FRAMES. THE INTEREST OF THE INVENTION IS TO REDUCE THE VOLUME OF THE FOLDED CHAIR AND TO ALLOW EASY MANUFACTURING AND ALLOWING A LOT OF VARIETIES OF MATERIALS AND SHAPES.

Description

1 2614771

  The present invention relates to a folding chair with back-

  Folding head whose general formula has already been stated and applied in particular in the French patent

No 1510290 by Mr Lécuyer.

  Said formula consists of articulating around the seat element, three U-shaped elements, the backrest, the front foot and the back foot in the following manner: each end

  superior of the front foot. is articulated on the lateral part

  seat, each upper end of the rear foot D is articulated on the corresponding lower end of the backrest, each arm of the backrest-not far from its articulation on the rear foot articulated on the side of the seat, and finally the front foot and the back foot articulate one on the other to their

crossing points.

  The very precise realization of M. Lécuyer results, when the chair is folded, to a general thickness which comprises three sub-thicknesses or stages stacked one on the other: the floor

  folder, the seat floor and the floor base.

  The present invention proposes, without departing from the general formula D, another arrangement of the U-shaped elements with respect to the seat so as to obtain, when the chair is folded, no longer a general thickness with three stages, but only two stages, which has the effect of resulting in a general volume of 1/3 lower than that of Mr. Lécuyer and allow to store, in a given space, about 50% more chairs. In the arrangement according to the present invention, when the chair is folded, the element U of the backrest is on the floor of the seat

  and immediately surround it on three sides - off the back -

  while another floor is constituted by the U of the back foot

) surrounded by the U of the front foot.

  A better understanding and other features of the invention will emerge from the examination of the accompanying drawings in which: - Figure 1 is a side elevational view of an unfolded chair,

  - Figure 2 is a perspective view of a folded chair.

  Referring to Figure 1, we see that the articulation

2 2614771

  of the front foot 4 on the seat 1, by the axis 8, takes place on a lower local advance 9 of the seat, so that after folding the front foot 4 is not at the seat 1, but at the bottom floor, as shown in Figure 2. In Figure 1, we also see the rear foot 3 articulated by the axis 7 on the

  front foot 4 and the axis 6 on the backrest 2 and stop

  not at the hinge 6, but extending in 10 until touching the underside of the seat 1, which has the effect of

  stop opening the chair in the right place while

  improving stability. As it appears again in FIG. 1, the backrest 2 articulated on the side of the seat 1 by the axis 5 pivots on said axis 5 so as to be on the seat floor, as it appears in FIG. 6 axis of junction back 2 - back foot is offset from the general plane

  of the folder so as to end at the end of folding on the floor

  m by the front foot 4 and the rear foot 3, the latter being pressed under the seat 1 surrounded on three sides by the front foot 4. In Figure 2 which shows the folded chair, we distinguish very well the two floors, the l one formed by the seat that surrounds the backrest, the other formed by the front foot surrounding

the back foot.

  Another feature of the invention does not appear

  on the figures, but these make it possible to understand

  dre. It concerns the adaptability of the invention to materials

  the manufacturing system and consequently the manufacturing system

cation itself.

  Referring to FIG. 1, the deformable quadrilateral formed by the axes 5, 6, 7 and 8 can be observed. This quadrilateral can be produced separately in flat iron, inexpensively, on an industrial scale. To build the chair, then simply stick, screw or rivet on these four flat irons the four

  elements of the chair: seat, backrest, front foot and foot

  which can be realized in materials and forms

  very diverse, resulting in a wide variety of

  its from a standard frame.

  Another version of the invention comprehensible without

  veaux schémas consists in articulating the back foot directly under the backrest, which results, after folding, in the fact that the U of the back foot is not plated under the seat but under the U of the backrest, while the U of the front foot surround the U of the foot

  back possibly overflowing around the U of the backrest.

  This second version is larger than the other.

2614771 '

Claims (8)

  1. P) folding backrest chair comprising a rectangular or square seat 1, a U-shaped back 2, a U-shaped front foot 4, a U-shaped rear foot 3, each upper end of the front foot 4 articulating on the lateral lateral portion S of the seat 1, each upper end   rear foot 3 articulating on the lower end cor-   the respondent of the backrest, each arm of the backrest, not far from its articulation on the back foot, articulating on the side of the seat, and the front foot and the back foot articulating one on the other (their point of crossing, characterized in that, after folding, said chair, in its thickness, comprises two floors, the upper floor constituted by the seat 1 surrounded on three sides - off the back side - by the U of the backrest 2 and the floor lower constituted by the U of the front foot 4 surrounding the U of the back foot 3.   2. Folding chair with folding backrest according to claim I characterized in that, in a first and advantageous version of the system, after folding, the U of the front foot 4 is pressed under the U of the backrest 2 and surrounds the U of the back foot 3, this   last being plated under the seat.   Folding chair with folding backrest according to claim I characterized in that, in a second, less compact version of the system, after folding, the U of the rear foot 3 is pressed under the U of the backrest 2, while the U of the foot before 4 surrounds the U of the back foot possibly brimming around from the U of the file.   Folding chair with folding backrest according to the claims   1, 2 and 3 characterized by the fact that the rear foot   3. when the chair is unfolded, will touch thanks to a prolonged   beyond its point of articulation on the file, the   under seat 1, thereby stopping the unfolding and participating to the stability of the chair.   5. Folding chair with folding backrest according to the claims   cations 1, 2 and 4 characterized by the fact that the articulation 8 foot before-seat is located on a local advance inferior   9 of the seat, so that after folding the front foot 4 is in the inferior stage (ur '.   Folding chair with folding backrest according to the claims   cations 1, 2, 4 and 5 characterized by the fact that the articulation 6 backrest-foot takes place, with regard to the backrest 2, on a thin local advance -forming flat hinge directed towards' front of the chair- said folder, so that after folding the hinge 6 in question is in the lower floor   with the back foot 3, between the latter and the front foot.   Folding chair with folding backrest according to the claims   1, 2, 4, 5 and 6 characterized in that the two deformed quadrilaterals delimited by the axes of articulation   backrest 5, backrest 6, forefoot foot rear   re 7 and foot before-seat 8 can be manufactured separately, industrially and cheaply, eg flat iron, and then receive, by screwing, gluing, welding or riveting the l! seat I and. the U-shaped elements, which reduces the constraints of precision during assembly and allows the use of a large   variety of materials and shapes around a central articulation standard tread.