WO1991015977A1

WO1991015977A1 - Adjustable seat made of a moulded plastics material

Info

Publication number: WO1991015977A1
Application number: PCT/FR1991/000310
Authority: WO
Inventors: Bruno Lefebvre
Original assignee: Allibert S.A.
Priority date: 1990-04-13
Filing date: 1991-04-12
Publication date: 1991-10-31
Also published as: FR2660844A1; FR2660844B1

Abstract

A seat made of a plastics material is stackable, can tilt between at least two positions, and includes a non-moving component consisting of a seating element (2) provided with supporting legs (3) bearing on the ground, and a movable component consisting of a back rest (4) connected to the seating element (2) by a hinge device arranged between a rear portion (2a) of the seating element (2) and a lower portion (4a) of the back rest, and by a hinged locking and adjustment device placed on at least one side of the seat (1) between said back rest (4) and said seating element (2). At least one of these devices consists of a thin web (5, 8, 11) acting as a hinge and obtained during a single moulding operation with the components to be hingedly connected. The seat is produced in one piece during a single plastics moulding operation, and can be used as an item of garden furniture.

Description

MULTI-POSITION SEAT IN MOLDED FLASTIC MATERIAL

The present invention relates to a seat, obtained overall by molding of plastic material of the tilting type, in at least two positions comprising a fixed part, constituted by a. seat provided with supporting feet on the ground and a movable part constituted by a backrest connected to the seat, on the one hand by means of articulation between a rear part of the seat and a lower part of the backrest, and on the other hand by articulated retaining and adjusting means arranged at least on one side of the seat between said backrest and said seat.

Of course, this type of multi-position seat must, in order to be able to be adjusted according to a chosen position, a certain number of articulations, in particular between the seat and the backrest, but also at the level of the retaining and adjusting means, generally consisting of at least one arm, interposed between the backrest and the seat, in an articulated manner.

These retaining and adjusting means are sometimes arranged directly on the means of articulation of the backrest with respect to the seat, but this does not exclude also requiring articulations at the level of the armrests, if the seat has one, between those -this and part of the seat itself.

These different joints are made in a known and conventional manner by cylindrical pins or studs. reported, cooperating for articulation in corresponding housings obtained or not during a molding operation of the seat part concerned.

It is also known to provide a housing on each part to be assembled, so as to be able to align them axially and secure them by an attached pin.

It is also known to obtain molding with each seat part concerned, respectively an axis and a housing, able to cooperate together during assembly.

The realization of these joints, at any level of the seat whatsoever, therefore involves the implementation of additional parts penalizing the cost price of the seat, in particular on labor costs, to perform the assembly of parts component parts of said seat.

The present invention aims to reduce these manufacturing and labor costs by proposing a seat of which at least one of its articulations is constituted by a web forming a hinge, obtained by molding with the parts having to be articulated between them.

The present invention also relates to the characteristics below, considered in isolation or in all their technically possible combinations.

According to one embodiment of the invention, the means of articulation of the backrest relative to the seat, are constituted by a web forming a transverse hinge capable of deforming angularly during an operation of adjusting the seat back relative to at his seat. According to another embodiment of the invention, the means for retaining bare and adjusting the backrest relative to the seat are constituted by at least one arm articulated by one of its ends on the backrest by means of a web forming a transverse hinge able to deform angularly during an adjustment operation of the backrest relative to the seat is anchored at its other free end to a fixed element of said seat.

Advantageously, the seat is obtained in a single piece during the same plastic molding operation. According to an alternative embodiment, the backrest and the arm are obtained in a single piece during the same plastic molding operation, to constitute a first part of the seat, connected to the seat constituting a second part of said seat, by articulation means known per se.

According to one embodiment, the anchoring of the arm on the fixed element of the seat is ensured by at least two housings made at the free end of the arm, capable of engaging during an adjustment operation , on a corresponding axis of the fixed element of the seat.

According to a preferred embodiment, the free end of the arm comprises a plurality of housings constituting a rack.

Advantageously, the seat comprises two arms arranged on either side of said seat and constituting on their upper part, armrests. According to a characteristic of the invention, each fixed element of the seat on an axis to which the free end of the arm is anchored, is an upright substantially perpendicular to the seat, and disposed in prominence on each side thereof. according to a height corresponding to the position of the bent elbows of a seated user.

According to another characteristic of the invention, the arms are obtained by molding with the backrest, in a relative position relative to said backrest and to the seat, such that it can be brought into cooperation with the uprights, under elastic stress, during their initial fixings or during an adjustment.

According to a variant, the anchoring axis of each arm crosses and opens out on either side of the seat post to form two studs in which a double rack anchored longitudinally under each free end of the arms is anchored.

Finally, the seat includes a seat provided with feet, able to be stacked in a storage position.

The invention will be further illustrated without being in any way limited by the description which follows, given with reference to the appended drawings in which:

- Figure 1 is a perspective view of a seat according to the invention obtained in one piece.

- Figure 2 is a perspective view in longitudinal half-section of a seat according to Figure 1 as resulting from molding.

- Figure 3 is a perspective view in half-section along tudinal of a seat according to Figure 1 showing the anchoring of the armrests.

- Figure 4 is "a perspective bottom view in a longitudinal half-section showing the adjustment means available under the armrests.

- Figure 5 is a perspective view of a seat according to the invention according to another embodiment. "

The reclining seat 1 shown in the figures comprises in a known manner a fixed part constituted by a seat 2 provided with support legs 3 resting on the ground and a mobile part constituted by a backrest 4 connected to the seat 2, on the one hand by articulation means between a rear part 2a of the seat 2 and a lower part 4a of the backrest 4, and on the other hand by articulated retaining and adjustment means arranged in the present example on each side of the seat 1 between said back 4 and said seat 2.

The seat 1 shown in FIG. 1 shows two possible adjustment positions I, II.

According to the invention, the means of articulation of the backrest 4 relative to the seat 2 are constituted by a web 5 forming a hinge capable of deforming angularly along a transverse axis XX 'during a backrest adjustment operation 4 of seat 1 with respect to its seat 2.

According to the invention, the web 5 is obtained with the backrest 4 and the seat 2 during the same molding operation. The web 5 constituting in fact an intermediate thinned part of the backrest-seat assembly. Advantageously, the means for retaining and adjusting the backrest 4 relative to the seat 2 are constituted by two arms 6 and 7 articulated by one of their ends 6a, 7a on the backrest 4 by a veil 8 obtained in an identical manner to the veil 5 and forming a transverse hinge capable of deforming angularly about an axis YY ', during an operation for adjusting the backrest 4 relative to the seat 2.

The arms 6, 7 are anchored at their other free ends 6b, 7b to fixed elements 9, 10 of said seat 2.

It is clearly understood here that the seat, in the present exemplary embodiment, is obtained integrally in a single piece during the same plastic molding operation.

As can be seen in FIG. 2 representing the seat 1 as it comes out of the mold release, the arms 6, 7 are molded in a position relative to the seat 2 and more particularly to the fixed elements 9, 10, so as to be in a static position, lower than the upper plane of the fixed elements 9, 10, so that said arms 6, 7 can be anchored on the latter under elastic stress, after pulling the arm upwards along F then a lateral displacement along F1 and finally a reverse return from top to bottom along F2 against the retaining and adjusting means on which said arms 6, 7 are anchored.

In order to facilitate lateral movement F1, a veil 11 constituted by a thinned part is provided to form a vertical hinge along the axis ZZ ', near the rod tion of the arms 6, 7 with the backrest 4.

The anchoring of the arms 6, 7 on the fixed element 9, 10 of the seat 2 is ensured by at least two housings 12, 13 formed under each of the free ends 6b, 7b and capable of engaging, under the elastic effect of the arms as described above, during an adjustment operation, on corresponding axes 17 of the fixed elements 9, 10 of the seat 2.

As shown in Figure 4, each free end 6b, 7b has a plurality of housings 12, 13, 14, 15, 16 constituting a rack. Preferably, the anchoring axis 17 crosses and opens on either side of the fixed elements 9, 10 to form studs 17A, 17B, in which the housings 12, 13, 14, 15, 16 and 12A are anchored. , 13A, 14A, 15A, 16A advantageously forming a double rack arranged opposite one another under each free end 6b, 7b, of each arm 6, 7 and anchoring simultaneously on each stud 17A, 17B on which the arms 6, 7 are held by elastic support.

It is clear from the figures that the arms 6, 7 constitute armrests.

To this end, each fixed element 9, 10 or the seat 2 is an amount substantially perpendicular to the seat 2, arranged in prominence on each side thereof at a height corresponding to the position of the bent elbows of a user. sit.

According to an alternative embodiment shown in FIG. 5, the backrest 4 and the arms 6, 7 are obtained in a single manner block during the same operation of

plastic as defined above, to constitute a first part 1A of the seat 1. This part 1A then being connected to the seat 2 constituting a second molded part 1B of said seat 1, by articulation means 18, 19 known per se.

This arrangement finds its advantage in complicated seat configurations, causing molding problems. Also, the invention applies in this case to a single part of the seat requiring articulations, in this case the backrest-arm assembly.

In all cases, the seat according to the invention comprises a seat 2 provided with feet, 3 able to be stacked in a storage position.

It should be noted that the thickness of the webs constituting a hinge according to the invention is of thickness adapted to the desired deformation between the parts to be hinged together. Also, the injection dosage of the plastic material will be appropriate.

Also, the relative position of the backrest relative to the seat during demolding will form an angle capable of causing a recall of said backrest, facilitating the possibility of straightening it for the user.

In the application, for example, of a so-called "deckchair", where the backrest effect is not sought, the web forming a hinge is molded accordingly.

Also, the amplitude of deformation of the veil is preferably approximately 30 ° and 90 ° for the so-called "transa" seats.

Claims

1 / Plastic seat of the type comprising at least two parts (1, 2) connected together by articulation means, constituted by at least one pin (3, 24) of one of the parts (2) capable of pivot in a housing forming a bearing (4, 25) of the other part (1), so as to constitute a hinge, the pin (3, 24) and the bearing (4, 25) are obtained respectively with the parts (2, 1) during a single injection molding operation in a single mold, a removable tubular insert

(20) being arranged in the mold of the parts (1, 2) to be injected, in the area of the articulation means, characterized in that the removable tubular insert (20) consists of a plurality of sectors (21) arranged in a crown and spaced apart from each other by interstices (22) capable of allowing, during molding, the obtaining of axial longitudinal branches (23) formed integrally with the spindle (24) and in breakable connection by their top (23a) with the bearing (25); which corresponds to the outer wall (26) of the crown of sectors

(21) constituting said insert (20); the height (H) of the branches (23) being identical to the thickness (E) of the sectors (21) so that in use, after breaking their top (23a), they compensate for the play (E1) obtained as a consequence of the own thickness (E) of the sectors (21) constituting the insert (20).