FR2534793A1 - ASSEMBLED SEAT FOR A MOTOR VEHICLE - Google Patents

Abstract

A CUSHION FOR A MOTOR VEHICLE SEAT INCLUDES A PADDING 12 AND A TOP 9 CONSISTING OF A MATERIAL THAT CAN BE WELDED BY ELECTRIC HEATING AT HIGH FREQUENCY, AND ARE JOINED TO ONE ANOTHER BY HIGH FREQUENCY ELECTRIC WELDING 14, 14.

Description

2534? 93

1.

  The present invention relates to a seat for

  hicle and, more particularly, a seat cushion.

  A seat cushion generally has a part

  hollow central tie which allows the seated person to have a stable and comfortable position.

  A prior art seat cushion is generally

  actually shown at A in Figures 1 and 2 and presented

  te a lowered central part B, The cushion A is made up

  killed by a urethane foam 2 in which a suspension wire 3 is enclosed, and a top 1 covering the foam 2 which has a fixing flange connected to the wire 3

  by a hook 4 But, in this seat cushion, the reaction

  yarn and hook on the weight of a person Sitting on the seat gives that person a feeling of discomfort

  manufacturing this cushion requires a large number of operations

  tions and the cost price is therefore high.

  Another seat cushion which has been proposed to improve that of FIGS. 1 and 2 is represented in FIGS. 3 and 4 It comprises a top 1 and a padding 2, which are welded to each other by electric welders

  high frequency 6 and 6 ', and urethane foam 5 is available

  placed between the top 1 and the padding 2, it further comprises 2. in addition a lining 7 in percaline intended for the padding 2 This seat cushion is not satisfactory as to its durability, since the joints welded to the lc between the top 1 and the padding 2 lose their resistance to the pressure exerted by friction, which results in the separation between the top and the padding after a relatively short period of time, In the prior art, the patent of the United States

  America No. 3,794,378 describes a siege suffering from in-

  just described.

  An object of the present invention is a seat cushion free from the drawbacks mentioned above from which the seats of the prior art suffer, and furthermore having better decorative characteristics. This object is achieved in a seat cushion which comprises a top made of a material which can be welded by high frequency electrical heating, a padding, a urethane foam being placed between the

  top and padding, and a sheet or strip of material

  riau which can be welded by electric heating at high

  frequency that is embedded in or related to the padding

this, and soldered on top.

  According to another aspect of the present invention, the top is not necessarily made of a material

  can be welded by high frequency electric heating

  this, but a strip of this material is applied to it,

  and welded to a sheet of material embedded in the padding

ge.

  This joining mode allows to obtain an ex-

  extremely durable, which presents no risk of separation

  tion for a long time, The seat cushion of the present invention requires no wire, no staple or the like, and is easy to manufacture It provides excellent comfort while the vehicle is running for the

  driver and its passengers, and greatly reduces the fati-

  even when sitting for a long time, the top can be made up of a number of pieces with a different design or color,

2534 T 793

  3, and the strip can have various shapes, and be applied to the top to hide the joint separating the parts.

  cushion therefore has a better aesthetic appearance.

  The present invention will be well understood when

  of the following description made in relation to

  attached drawings in which: Figure 1 is a perspective view of a conventional seat cushion;

  Figure 2 is a partial view of the cons-

  interior construction of the seat cushion shown in fig-

  re 1; Figure 3 is a partial sectional view of the process of welding the top and padding for another conventional seat cushion; Figure 4 is a partial sectional view of the welded assembly formed by the seat shown in Figure 3;

  FIG. 5 is a partial view in cross section

  versale, before assembly, of a cushion according to the present invention; Figure 6 shows the welding of a top and padding for the cushion illustrated in Figure 5; Figure 7 is a cross-sectional view

  of the welded assembly formed by the seat shown in fig-

re 6;

  Figure 8 is a perspective view of a rem-

  cushion stuffing according to another embodiment of the present invention; Figure 9 is a view similar to Figure 8, but showing an alternative arrangement; Figure 10 is a view similar to the figure, but showing the seat cushion using the rem-

  jam shown in figure 8 or À-

  Figure 1 l is a view similar to Figure 6, but showing the cushion illustrated in an exploded view in Figure 10;

  FIG. 12 is a partial view in cross section

  versal of the welded assembly formed by the cushion represented

  tee in Figure 11; 4. Figure 13 is a perspective view of a cushion according to another embodiment of the present invention; Figure 14 is a perspective view showing a modified form of the cushion of Figure 13; Figure 15 is a partial cross-sectional view, before assembly, of the cushion shown in Figure 13 or 14; Figure 16 is a partial view; on a large scale, of part of FIG. 15; Figure 17 is a partial view, in cross-section, showing the welding process of the cushion shown in Figure 13 or 14; FIG. 18 is a partial view, in cross section on a large scale, of the cushion shown in FIG. 13 or 14; and

  Figures 19 to 21 are a series of views

  presenting the welding process allowing the manufacture-

  tion of a variant of the cushion of Figures 13 or 14.

  Firstly in connection with FIGS. 5 to 7 of the drawings, there is shown a seat cushion according to the

  present invention, this comprises a top q, a gar-

  niture 10 placed under the top 9, a lining II of the lining 10 and a padding 12 joined to the top 9, The top 9 is made of a material which can be welded

  by high frequency electric heating, such as ma-

  material called nylon, polyester or polyvinyl chloride

  The lining 10 is made of urethane, The lining 11 is preferably made of the same material as the

  on top but can be omitted in certain cases The padding-

  rage 12 has a groove 12 which extends along each side of the cushion, an elongated sheet 13

  of material welded by electric heating at high fre

  quence, for example of so-called nylon material, polyester or vinyl chloride, is embedded in the padding 12, and has an exposed part in each groove 12 a,

  The top 9 is joined to the padding 12 in use

  reading high frequency electric welders 14 and 5.

  14 ', as shown in Figures 5 and 6 When applying

  cation of a high frequency voltage at the electrodes of the welding machines, the top 9 is welded to the sheets 13 as

  represented in a and e of figure 7, as well as in the double-

  re 11 as shown in b to d of FIG. 7.

  Another embodiment of the present in-

  vention is shown in figures 8 to 12 The cushion

  also takes a top 10, a trim 21, a lining

  re 22 for the lining 21, and a padding 23 which is

  gathered above 20 and consists of a uretha foam

  ne The cushion differs from that of FIG. 7 by the presence of a plurality of bands 24 linked to the surface of the padding 23 instead of being enclosed therein, Each band 24

  consists of a material that can be welded by heating

  high frequency electrical fage, for example, the material called nylon, polyester or vinyl chloride Each strip 24 is linked to the padding 23 by an adhesive applied to the lower surface of the strip as shown in

  of figure 8, or by an adhesive applied to the padding-

  rage 23 as shown in 26 of Figure 9 Regarding the other aspects, the cushion is identical to that of Figure 7 The top 20 is, as previously joined to the padding 23 by means of high frequency electric welders 26 and 26 ' as shown in Figures 10 and 11,

  from which it follows that the top 20 and the strips 24 are closed

welded together.

  In connection with FIGS. 13 to 18, we have shown

  felt a new embodiment of the present invention

  tion Figures 13 and 14 show cushions of

  seat with recessed central parts of different shape

  annuity C and D, respectively Nevertheless, the process of

  manufacturing can be the same, as shown in the fi-

  gures 15 to 18 Each cushion includes a top 30, a trim 31, a

  lining 32 for lining 31 and padding 33 in urea foam

  thane which is assembled above 30, These cushions are distinguished from that of FIG. 7 by one or more bands 34 made of a material which can be welded by high frequency electrical heating, bands

  which are applied to the top 30 when it is joined to the padding

  rage 33 The top 30 and the lining 32 are preferably made

  of a material which can be welded by electric heating at high fre

  quence, but it is also possible to use a material

  different riau In addition, the lining 32 may be omitted as a whole, One or more sheets 35 made up

  killed by material which can be welded by electric heating

  high frequency stick, for example the material called ny-

  lon, polyester or vinyl chloride, -are embedded in the padding 33, while the strip (s) 34 are

  made of the same material as the sheet or sheets 35.

  The top 30 is joined to the padding 33 in use.

  reading a high frequency electric welder, shown

  tee in 36 and 36 'The upper welder 36' includes one or more electrodes 36 'a each having one end

  enlarged bottom 37 as shown in figure 16,

  that the top 30 is joined to the padding 33, the strip 34, or each strip 34 is applied to the enlarged end 37 of the electrode 36 'a, or to one of the electrodes as appropriate. The end 37 may have any suitable form which

  is adapted to that of band 34 Band 34 is com-

  awarded against the top 30 and welded to the sheet 35 when a high frequency voltage is applied to the electrode The material in excess of the strip extending

  around the lower end 37 of the electrode is

  cut by the stamping effect of the lower end 37.

  Figures 19 to 21 show a variant of the seat cushions just described in connection

  with Figures 13 to 18, This variant includes a

  sus 40 composed of a pair of parts 40 a and 40 b overlapping-

  singing along their contiguous edges, a pair of pieces

  these lining 41 a and 41 b, a pair of liners 42 a and 42 b for the lining, and padding 43, A strip

  of material which can be welded by electric heating

  that at high frequency is soldered to a sheet 44 made up

  killed of the same material by means of a high frequency electric welder following the process which has already been described The strip 45 hides the overlapping edges of the

  top pieces 40 a and 40 b The top 40 is preferably

  made of a material that can be welded by heating

  high-frequency electric ge, 7, The present invention is not limited to the embodiments which have just been described, it

  is on the contrary susceptible to modifications and varian-

  those who will appear to those skilled in the art,

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8,

Claims (6)

  1 seat cushion with padding   and a top securely attached to each other,   because the padding and the top are made of a material that can be welded by electric heating   at high frequency, and are joined to each other by sou-   high frequency electrical dage.   2 cushion according to claim 1, character-   laughed in that the top is made of this material,   3 cushion according to claim 2, character-   laughed in that the material is embedded in the padding.   4 cushion according to claim 2, character-   laughed in that the material is bonded to the surface of the rem- stuffing.   5 cushion according to claim 1, character-   in that the top supports a strip made up of-   said material, while this material is also drowned in the padding.   6 cushion according to claims 2, 3, 4 or   5, characterized in that the said material is chosen from the group consisting of the so-called nylon material of the polyester and vinyl chloride.