FR2822766A1 - Automobile seat with anchorings for child seat has rigid tubular crosspiece on which two supports are threaded and on which wires are fixed to form anchoring loop for child's seat - Google Patents

Abstract

The seat back has a structure (7) with a rigid tubular crosspiece (9) and two supports (12,13) which are threaded on the crosspiece and on which wires are fixed so that a portion of the wires forms an anchoring loop (14) on which a child's seat can be attached.

Description

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MOTOR VEHICLE SEAT WITH ANCHORING DEVICE
ELEMENTS SUCH AS CHILD SEATS
The present invention relates to motor vehicle seats provided with an anchoring device for elements, such as child seats.

 Already known from document DE-A-196 50 087 a seat for a motor vehicle comprising: - a backrest, - a seat which extends in a longitudinal direction between a rear end close to the backrest and a front end remote from the backrest , - a structure with a rigid cross member which extends in a horizontal transverse direction, perpendicular to the longitudinal direction, and - at least first and second anchor loops in rigid metal wire which are secured to the structure and which are intended to fix at least one element attached to the seat and provided with anchoring members complementary to the anchoring loops. These anchor loops are shaped and dimensioned to retain the element when the vehicle is impacted. The element in question is for example a child seat.

 In the seat described by this document, the anchor loops are welded to supports mounted on a cross member secured to the rest of the seat structure by bolts. This type of seat, which is entirely satisfactory, requires an assembly in which drilling, screwing, etc. operations take place, as well as numerous parts (wire, nut, screw, crosspiece, etc.).

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 An object of the invention is to provide a motor vehicle seat, the mounting of the anchor loop supports is easy and resistant.

 This object is achieved by a motor vehicle seat as defined above, in which the structure comprises at least first and second rigid supports which cooperate by interlocking with the cross-member and on which the first and second anchor loops are fixed. .

 Indeed, the mounting of the anchoring loop supports of the seat of the motor vehicle according to the invention is carried out by simple interlocking, hence easy assembly.

In addition, the supports fitted with the cross member and at least partially enclosing the latter, offer significant resistance in the event of traction on the anchor loops. In addition, the second rigid support can be positioned at the desired location along the crosspiece. Finally, fitting by fitting optionally makes it possible to avoid the drawbacks of welding on aluminum, if one chooses to make the structure in this material.

- le dossier comporte un bord inférieur et la traverse est située au voisinage dudit bord inférieur ; - la structure comporte en outre au moins des premier et deuxième montants sensiblement verticaux, le premier support coopérant par emboîtement avec le premier montant pour solidariser le premier montant avec la traverse ; Advantageously, the seat according to the invention has the following characteristics, taken separately or in combination: - the structure is made of aluminum-based material - the structure belongs to the backrest;

- The backrest has a lower edge and the cross member is located in the vicinity of said lower edge; - The structure further comprises at least first and second substantially vertical uprights, the first support cooperating by interlocking with the first amount to secure the first amount with the cross;

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 - The structure comprises a third support, symmetrical with the first support, which cooperates by fitting both with the cross member and with the second upright to secure the second upright with the cross member; - The backrest is pivotally mounted about a transverse horizontal axis by two pivots fixed respectively to the first and third supports; - The wire constituting the anchor loops is fixed to the first or to the second support by insertion of an end branch of this wire in at least one gutter provided in each of these supports; - Each gutter is closed longitudinally by the cross member or the first upright, when the cross member or the first upright is fitted with one of the first and second supports, to make captive of this gutter the end branch of the wire constituting the loops d 'anchoring; - The cross member and the first or the second support are clamped, after their assembly, by crushing the gutter; - The cross member and the first or the second support are assembled under constraints of the fact that the end branch of the wire constituting the anchor loops inserted in a gutter has a section whose diameter is greater than the internal diameter of this gutter or that 'it has a local outgrowth; - a damping material is placed between the cross member and at least one of the first and second supports; - The cross member and the first or the second support are secured by a supply of material chosen from bonding, welding and puttying; and

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 - At least one of the first and second supports is produced by cutting extruded profiles.

- la figure 4 représente schématiquement en coupe transversale selon IV-IV, le support représenté sur la figure 3 ; - la figure 5 représente, schématiquement en perspective, l'autre support représenté sur la figure 2 ;

- la figure 6 représente schématiquement en coupe transversale selon VI-VI, le support représenté sur la figure 5 ; - la figure 7 représente schématiquement en perspective un mode de réalisation de la boucle d'ancrage destinée à être fixée sur le support représenté sur les figures 3 et 4 ; - la figure 8 représente schématiquement en perspective un mode de réalisation de la boucle d'ancrage destinée à être fixée sur le support représenté sur les figures 5 et 6 ; Other aspects, objects and advantages of the invention will be better understood with the aid of the detailed description which follows, as well as with the aid of the appended drawings in which: - Figure 1 shows schematically in side view a motor vehicle seat on which a child seat is fixed; - Figure 2 shows schematically in perspective the structure of the backrest of the vehicle seat shown in Figure 1, with supports for fixing anchor loops of the child seat on this structure; - Figure 3 shows schematically in perspective one of the supports shown in Figure 2;

- Figure 4 shows schematically in cross section along IV-IV, the support shown in Figure 3; - Figure 5 shows, schematically in perspective, the other support shown in Figure 2;

- Figure 6 shows schematically in cross section along VI-VI, the support shown in Figure 5; - Figure 7 shows schematically in perspective an embodiment of the anchor loop intended to be fixed on the support shown in Figures 3 and 4; - Figure 8 shows schematically in perspective an embodiment of the anchor loop intended to be fixed on the support shown in Figures 5 and 6;

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 - Figure 9 shows schematically in perspective another embodiment of the anchor loop shown in Figure 7; and FIG. 10 schematically shows in perspective another embodiment of the anchoring loop shown in FIG. 8.

 By way of example, but without limitation, a motor vehicle seat according to the invention is presented below in an implementation intended for fixing a child seat.

 This motor vehicle seat is shown in FIG. 1.

 This seat 1 of a motor vehicle has a seat 2 and a backrest 3. The seat 1 is fixed to the floor 4 of the motor vehicle. The seat 2 extends in a longitudinal direction X between a rear end 2a close to the backrest 3 and a front end 2b remote from the backrest 3.

 A child seat 6 is attached to the seat 1 by means of anchor loops 14. To each anchor loop 14 is attached a guide 15 for an arm 16 belonging to the child seat 6. The arm 16 is inserted into the guide 15 to cause it to clip onto the corresponding anchor loop 14.

 Part 2 of the backrest has been shown in FIG. 2. The structure 7 of the backrest is normally concealed in the padding of the seat 1, but in FIG. 2, the backrest 3 is devoid of its padding and its covering cap so to show more clearly the elements of the seat according to the invention. The bottom of the backrest 3 is located in this figure 2 towards the bottom of the drawing sheet.

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 The rear face of the backrest 3, that is to say the face opposite to that on which a passenger can lean, is formed of a bottom plate 8 mounted on the structure 7. The structure 7 comprises: - a rigid lower cross member 9 which extends in a horizontal transverse direction Y, perpendicular to the longitudinal direction X, - at least two substantially vertical uprights 10, which extend in a direction Z perpendicular to the horizontal transverse direction Y, the end lower of each upright 10 being assembled at one end of the cross-member 9, - a horizontal upper cross-member 11 (not shown in FIG. 2, but shown in FIG. 1) which joins the upper ends of the uprights 10, - and a plate bottom 8 located at the rear face of the backrest 3, this bottom plate being assembled to the crosspieces 9, 11 and / or to the uprights 10.

 The cross member 9 and the uprights 10 are interconnected by first and third rigid supports 12, 12 '.

A second rigid support 13 is threaded on the cross-member 9.

 The first support 12 and the second support 13 are respectively used for fixing an anchoring loop 14. The first and third supports 12, 121, symmetrical to one another, respectively comprise a pivot 17. The pivots 17 extend respectively in opposite directions from one another, in a direction Y 'parallel to the longitudinal direction Y of the cross-member 9. The backrest 3 pivots around the pivots 7 which rotate, for example on supports integral with the vehicle body, to allow the backrest 3 to be folded forward, for example

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 when the seat 2 is raised by pivoting about an axis (not shown) located towards its front end (2b).

 Figures 3 and 4 show the first support 12 in which are inserted an upright 10 and the cross 9. The first support 12 has a mortise 20 and a fork 21. The mortise 20 is a tubular recess of square section. The fork 21 consists of two walls 22 extending, on the same side of the mortise 20, two opposite walls of the latter. Two gutters 18 extend longitudinally, parallel to the direction Z, respectively on the inner face of the front wall of the mortise 20 and on the inner face of the front wall 22 of the fork 21 which extends this front wall of the mortise 20 The gutters 18 are respectively open towards the inside of the mortise 20 and the fork 21. The mortise 20 is intended for the insertion of an upright 10. The fork 21 is intended for the insertion of the cross-member 9.

While the mortise 20 forms a wall completely surrounding the end of the upright 10 intended to be inserted therein, the walls 22 of the fork 21 only cover two opposite faces of the end of the cross member 9 intended to be inserted therein, in the example considered.

 The end branches of the wire constituting the corresponding anchor loop 14 are inserted respectively in two gutters 18. The portion of the wire constituting the loops 14 which is not inserted in the gutters 18 makes it possible to fix the corresponding arm 16 of the child seat 6. The free ends 19 of this wire slightly exceed the gutters 18 and are folded in order to better maintain said wire in the first support 12.

 For mounting an anchor loop 14 on the first support 12, the ends of the wire are inserted

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 anchor loop 14 in the gutters 18 as indicated above. Then an upright 10 is inserted into the mortise 20, as well as the cross member 9 into the fork 21, which has the effect of making the thread of the anchoring loop 14 trapped in the first support 12.

 Figures 5 and 6 show the second support 13. This second support 13 has an annular section which has four walls 23 at right angles two by two. Each of these walls 23 extends parallel to the direction Y. The front wall 23, that is to say the one furthest from the bottom plate 8 comprises a gutter 18 extending over its entire length parallel to the direction Y. The bottom wall 23 oriented towards the bottom of the backrest 3 also comprises a gutter 18 extending over its entire length parallel to the direction Y. The two gutters 18 are open towards the inside of the support 13.

 The end branches of the wire of the corresponding anchor loop 14 are each inserted into a gutter 18, with the free ends of this wire located on opposite edges of the second support 13. The part of the wire of the anchor loop 14 located between the end branches inserted in the gutters 18 allows the attachment of the arm 16 corresponding to the seat 6 for children.

 For mounting the wire of an anchor loop 14 on the second support 13, the ends of this wire are inserted into the gutters 18. Then the crosspiece 9 is threaded into the second support 13, this operation having the effect of rendering the wire of the anchoring loop 14 trapped in this second support 13.

 Furthermore, to limit the possible clearances between the different parts thus assembled, and therefore possible rattling noises generated by these clearances, it is advantageous

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 perform the assembly of the structure under stress with plastic or elastic deformation.

 The solution which consists in mounting the structure 7 under stresses with plastic deformation, consists, for example, according to the variant illustrated in FIGS. 3 to 6, using an anchor loop wire 14 whose diameter is such that it exceeds slightly gutters 18 towards the inside of the first or second support 12, 13. The assembly of the first or second support 12, 13 on the cross-member 9 or an upright 10 is therefore done by force, for example with a slight deformation plastic of the cross member 9, the upright 10 or the first or second support 12, 13. This eliminates the possible play between the parts.

 According to a variant, localized growths are produced on the cross-member 9 or on the wire of the anchoring loop 14 at the level of the gutters 18. The assembly is then carried out by force. The protrusion interacts with the cross-member 9, the upright 10 or the support 12, 13 and creates a deformation of one of these parts or is crushed by one of these parts, thus reducing the play to a zero value.

 The solution consisting in mounting the structure 7 under constraints with plastic deformation, consists, for example, in using the elastic properties of the wire of the anchor loops 14, so that the latter deform during assembly and make up for the assembly play said loops 14 in their supports 12, 13. The mounting is then done without significant effort.

 This variant is illustrated in Figures 7 and 8 on which are shown anchor loops 14 intended to be fixed respectively on a first support 12 and a second support 13. According to this variant, the end branches of the loop anchor 14,

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 intended to be inserted into the gutters 18, extend in directions which are not entirely parallel to each other. The parallelism which is imposed on them when they are inserted into the gutters 18, puts under stress the parts which cooperate at the level of a support 12, 13, which cancels any play.

 It is also possible to cancel the game by clamping after assembly. The clamping after assembly consists in locally obstructing the clearance between the anchoring wire 14, the support 12, 13 and the cross-member 9 after their assembly. This is done either by crushing the support 13 (by crimping, by deformation by friction, etc.), or by an addition of material (solder, glue, mastic, etc.). When providing a flexible sealant, the latter solution has the advantage of limiting noise without completely blocking the movement of the parts between them.

 The cancellation of the game can also be carried out using a damping material. In this case, damping means are placed in the contact zones between the cross-member 9 and the first or the second support 12, 13 or the upright 10 and the second or third support 12, 12 '. Such damping means are for example constituted by one or more plastic or elastomeric elements glued to the cross-member 9, the upright 10 or the support 12, 12 ′, 13. Another example of damping means is constituted by a threaded plastic or elastomer sheath at the ends of the wire of the anchoring loop 14 at the level of the contact zones generating noise. This variant is illustrated in FIGS. 9 and 10, on which are shown anchor loops 14 intended to be fixed respectively on a first support 12 and a second support 13.

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 The cross member 9 and the uprights 10 are made of rigid tubes. Preferably, these are made of aluminum.

 The first, second and third supports 12, 12 'and 13 can also be made of aluminum. They are advantageously cut from an extruded profile. The manufacture of these parts is therefore very economical. The wire of the anchor loops 14 is advantageously made of steel, for example with a diameter of 6 mm. The anchor loops 14, after mounting on the first and second supports 12, 13, advantageously meet the "Isofix" standard.

Claims (14)

 CLAIMS 1. Seat for a motor vehicle comprising: - a backrest (3), - a seat (2) which extends in a longitudinal direction (X) between a rear end (2a) close to the backrest (3) and a front end (2b) remote from the backrest (3), - a structure (7) with a rigid crosspiece (9) which extends in a horizontal transverse direction (Y), perpendicular to the longitudinal direction (X), and - at least first and second anchor loops (14) made of rigid metal wire which are secured to the structure (7) and which are intended to fix at least one element (6) attached to the seat and provided with anchor members (15 , 16) complementary to the anchor loops, characterized in that the structure (7) comprises at least first and second rigid supports (12, 13) which cooperate by interlocking with the cross-member (9) and on which the first and second anchor loops (14).  2. Seat according to claim 1, wherein the structure (7) is made of aluminum-based material.  3. Seat according to one of the preceding claims, in which the structure (7) belongs to the backrest (3).  4. Seat according to one of the preceding claims, wherein the backrest (3) has a lower edge and the crosspiece (9) is located in the vicinity of said edge. <Desc / Clms Page number 13>  5. Seat according to one of the preceding claims, wherein the structure (7) further comprises at least first and second uprights (10) substantially vertical, the first support (12) cooperating by interlocking with the first upright (10) to secure the first upright (10) with the crosspiece (9).  6. Seat according to claim 5, wherein the structure (7) comprises a third support (12 '), symmetrical with the first support (12), which cooperates by fitting both with the crosspiece (9) and with the second upright (10) to secure the second upright (10) with the crosspiece (9).  7. Seat according to claim 6, wherein the backrest (3) is pivotally mounted about a transverse horizontal axis (Y ') by two pivots (17) fixed respectively to the first (12) and third (12') supports.  8. Seat according to one of the preceding claims, in which the wire constituting the anchor loops (14) is fixed to the first or to the second support (12,13) by insertion of an end branch of this wire into at least one gutter (18) provided in each of these supports (12,13).  9. Seat according to claim 8, wherein each gutter (18) is closed longitudinally by the crosspiece (9) or the first upright (10), when the crosspiece (9) or the first upright (10) is fitted with the one of the first and second supports (12,13).  10. Seat according to one of claims 8 and 9, wherein the crosspiece (9) and the first or second support (12,13) are clamped, after assembly, by crushing the gutter (18). <Desc / Clms Page number 14>  11. Seat according to one of claims 8 to 10, wherein the crosspiece (9) and the first or second support (12,13) are assembled under constraints that the end branch of the wire constituting the loops d anchor (14) inserted in a gutter (18) has a section whose diameter is greater than the internal diameter of this gutter (18) or that it includes a local protuberance.  12. Seat according to one of the preceding claims, in which a damping material is placed between the crosspiece (9) and at least one of the first and second supports (12,13).  13. Seat according to one of the preceding claims, wherein the crosspiece (9) and the first or second support (12,13) are secured by a supply of material selected from bonding, welding and puttying.  14. Seat according to one of the preceding claims, wherein at least one of the first and second supports (12,13) is produced by cutting extruded profiles.