GB2327602A - Vehicle headrest with aperture & process for makning it - Google Patents

Vehicle headrest with aperture & process for makning it Download PDF

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Publication number
GB2327602A
GB2327602A GB9816065A GB9816065A GB2327602A GB 2327602 A GB2327602 A GB 2327602A GB 9816065 A GB9816065 A GB 9816065A GB 9816065 A GB9816065 A GB 9816065A GB 2327602 A GB2327602 A GB 2327602A
Authority
GB
United Kingdom
Prior art keywords
headrest
edge
free edges
mould
cover
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Withdrawn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
GB9816065A
Other versions
GB9816065D0 (en
Inventor
Helene Houivet
Pablo Mosquera
Jean-Marc Petra
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.)
Faurecia Sieges dAutomobile SAS
Original Assignee
Bertrand Faure Equipements SA
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 Bertrand Faure Equipements SA filed Critical Bertrand Faure Equipements SA
Publication of GB9816065D0 publication Critical patent/GB9816065D0/en
Publication of GB2327602A publication Critical patent/GB2327602A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
    • B29C44/143—Means for positioning the lining in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0033—Moulds or cores; Details thereof or accessories therefor constructed for making articles provided with holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/58—Seat coverings
    • B60N2/5891—Seat coverings characterised by the manufacturing process; manufacturing seat coverings not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80—Head-rests
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
    • B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3023—Head-rests

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Seats For Vehicles (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The headrest has a generally annular head support containing a U-shaped insert 6 and having a fabric cover comprising at least two pieces 13,14 with free edges 16,17 which overlap around the periphery 18 of the central aperture 9. In making the headrest, the cover is placed in an injection mould, the insert is placed inside the cover through the gap between the edges 16,17 which are then pressed together and polyurethane foam injected into the mould. The overlapped portion may be tangential to the cover with one edge 17 having a hem arranged to be visible from the outside of the cover. Alternatively (Fig 5) the overlap may extend inwardly of the headrest, the free edges being turned back against a flexible strip (22) located on the edge of the mould.

Description

2327602 APERTURED HEADREST AND PROCESS FOR THE MANUFACTURE OF THIS
HEADREST The present invention relates to an apertured headrest for a motor vehicle seat.
More particularly, the invention concerns an apertured headrest for a motor vehicle. this headrest being provided with a central aperture and comprising:
- a generally U-shaped insert; - a padding supported by the insert; and a flexible, substantially torus-shaped encasing cover which delimits an interior space containing the padding and which comprises at least two pieces of fabric.
The current processes for the manufacture of these types of annular headrests require the cover to be put together by sewing a plurality of pieces of fabric so as to form a virtually closed ring. Only a so-called lwallet opening" is made in the exterior edge of the headrest, over a length corresponding to the spacing of the two branches of the U shape of the insert. After the cover has been sewn. it is turned back through this wallet opening.
The insert is then put in place in the annular shape of the cover by sliding one of the branches of the U into the annular shape which has been previously produced. Now, the shape of the cover is not suited to facilitating the passage of the said branch, thereby making it very difficult to put the insert in place, the difficulty increasing with the size of the central aperture, and this may even damage the inside of the fabric whose role is to ensure good sealing against the polyurethane foam which is then to be injected to form the padding of the headrest. Moreover, this damage 2 is not visible from the exterior and leads to rejection of the headrest after injection owing to the penetration of the foam into the fabric constituting the cover.
Furthermore, the sewing operations are difficult to perform and turning back the cover is tedious. This manufacturing process is therefore costly in terms of labour and does not ensure a definite quality of the headrest.
The object of the present invention is to overcome the above-mentioned disadvantages by providing a headrest, the manufacturing process of which employs simple, effective and inexpensive means.
To that end. according to the invention, there is provided an apertured headrest for a motor vehicle seat, the headrest being provided with a central aperture and comprising:
- a generally U-shaped insert; - padding supported by the insert; and - a flexible. substantially torus-shaped encasing cover which delimits an interior space containing the padding and which comprises at least first and second pieces of fabric, each of the first and second pieces of fabric having a free edge in the region of the central aperture, the free edges delimiting between them a passage which connects the interior space of the cover with the exterior over the major part of the periphery of the said central aperture, wherein the free edges are pressed against one another and define a mutually overlapping zone which closes the said passage.
The apertured headrest according to the invention may, if necessary, further include one or more of the following features:
3 - the overlapping zone is tangential to the surface of the headrest, one of the two free edges being visible on the exterior of the headrest; - the said free edge visible on the exterior of the headrest is formed as a hem; - the two free edges are oriented towards the interior of the padding; and - the two free edges extend over the entire periphery of the central aperture.
A further subject of the invention is a process for the manufacture of a headrest of the type defined hereinbefore, the process comprising the steps of:
- positioning the pieces of fabric in an injection mould; - placing the insert in the injection mould in that this insert is made to penetrate into the interior space of the cover through the said passage delimited between the two free edges of this cover; - pressing the said two free edges against one another in the region of the aperture of the headrest; and - injecting foam to produce the padding.
The process according to the present invention therefore makes it possible to put in place an insert in the cover of the headrest before the injection of the polyurethane foam forming the padding while at the same time reducing the number of seams and without damaging the inside of the fabric used to make the cover. The process also enables the manufacture of apertured headrests of any shape while at the same time ensuring that the insert can be put in place.
4 The process according to the present invention may, if necessary, further include one or more of the following features:
- the step consisting of pressing the two free edges against one another consists of making a first edge overlap a second edge, over an overlapping area greater than that obtained after injection, at least a part of one of the pieces of fabric not being pressed against the mould before the injection of the foam; - the first edge is formed as a hem and is visible on the exterior of the headrest, the second edge being formed as a clean cut and belonging to the piece of fabric not pressed on the mould before injection; - during the injection step, the second edge slides along the first edge and the piece of fabric initially not pressed against the mould is pushed back against the said mould; and - the step consisting of pressing the two free edges against one another consists of placing at least one flexible strip radially in the mould and of turning back the two free edges towards the interior of the padding while applying them against the said flexible strip.
Two exemplary embodiments of the invention will now be described with reference to the accompanying drawings, in which:
-Figure 1 is a perspective view of a seat back for a motor vehicle supporting a headrest according to an embodiment of the invention; Figure 2 is a perspective view of the apertured headrest of Figure 1; Figure 3 is a cross-sectional view of the injection mould in which the cover of the headrest is placed and into which the polyurethane foam is in the process of being injected; - Figure 4 is a cross-sectional view of the headrest; - Figure 5 is a cross-sectional view of a mould in which a cover according to a second embodiment of the invention is placed; and - Figures 6 and 7 are views through the headrest which is represented in Figures 2 to 4 and in which two types of insert are mounted.
Figure 1 represents an upper part of a seat back 1 for a motor vehicle which supports an apertured headrest 2.
Figures 1 and 2 show that the apertured headrest 2 consists of a generally U-shaped insert 3 which supports a padding 4 consisting of polyurethane foam, itself enveloped in a flexible encasing cover 5.
The insert 3 consists of a base 6 from which extend two pins 7 and 8, each having a substantially flat S shape.
The encasing cover 5 is made from a plurality of pieces of fabric joined together so as to form a torus-shaped cover and having a central aperture 9 situated within the U shape of the insert 3.
Figures 3 and 4 show in greater detail that the flexible cover 5 consists of a fi rst, outer lateral piece of fabric 10 wh ich is sewn to second and th i rd, front 11 and rear 12, pieces of fabric, themselves sewn to fourth and fifth, inner lateral pieces of fabric 13 and 14.
Each of the fourth and fifth, inner lateral pieces 13 and 14 has a free edge 16 and 17, these two edges being simply pressed against one another in the region of the central aperture 9 of the headrest, over substantially the entire periphery of the aperture or over the entire length of the periphery.
6 The two edges then delimit a passage which is closed by simple mutual overlapping of these two edges over a zone 18.
In the first embodiment of the headrest represented in Figures 3 and 4, the free end 16 is formed as a clean cut, whereas the free end 17 is formed as a hem. The overlapping zone 18 is tangential to the surface of the cover 5 so that the free edge 16 is overlapped by the free edge 17 which is thus visible from the exterior of the headrest.
The process for the manufacture of the headrest which has just been described consists, in a first stage, in placing the first to fifth pieces of fabric 11 to 14 in an injection mould 20 so that a part of the first piece 10, the second piece 11 and also the fourth piece 13 are not pressed against the walls 21 of the mould 20. After the insert has been put in position in the cover thus "opened", the free edge 17 is kept, by any means, pressed against the walls 21 and the free edge 16 is brought inside the free edge 17 to form the overlapping zone 18.
In a second stage, the injection of the polyurethane foam intended to form the padding 4 is carried out. During the injection, the inflation of the foam causes the displacement of the pieces 10, 11 and 13 which are then pressed against the walls 21 of the mould. During this movement, the free edge 16 moves along the edge 17 so that on completion of the injection, the free edges 16 and 17 are pressed against one another over an overlapping area less than that in which they had been positioned before injection. The area of the final overlapping zone is sufficient to prevent the polyurethane foam from flowing out of the headrest during the injection and to ensure it clamps the free edge 16 against the free edge 17.
1 1 7 The second embodiment represented in Figure 5 differs from the first embodiment merely in the orientation of the overlapping zone 18 of the free edges 16 and 17. Thus, the elements common to both embodiments bear. hereinbefore. the same references as before.
The free edges 16 and 17 are placed in the injection moulded 20 to be oriented towards the interior of the cover 5 so that the overlapping zone 18 is radial to the annular shape of the headrest.
In order to facilitate their putting in place, the free edges 16 and 17 are pressed against a flexible strip 22 which is radially borne by one of the elements of the mould 20.
This flexible strip 22 is of low thickness so that after injection and removal from the mould., the free edges 16 and 17 are urged against one another by the polyurethane foam.
Figures 6 and 7 show that the process for the manufacture of the two embodiments of the headrest according to the present invention enables different types of inserts 3 to be fitted.
Indeed, the insert 3 represented in Figure 6 is a special insert. The pins 7 and 8 respectively have a joint 25 and the flexible cover 5 has two guides 26 in which the pins 7 and 8 move during the pivoting movement of the headrest.
The insert 3 represented in Figure 7 includes a reinforcement 27 connected to the two pins 7 and 8 and disposed parallel to the base 6, opposite this base with respect to the aperture 9.
8

Claims (12)

1. An apertured headrest for a motor vehicle seat, the headrest being provided with a central aperture and comprising:
- a generally U-shaped insert; - padding supported by the insert; and - a flexible, substantially torus-shaped encasing cover which delimits an interior space containing the padding and which comprises at least first and second pieces of fabric, each of the first and second pieces of fabric having a free edge in the region of the central aperture, the free edges delimiting between them a passage which connects the interior space of the cover with the exterior over the major part of the periphery of the said central aperture, wherein the free edges are pressed against one another and define a mutually overlapping zone which closes the said passage.
2. A headrest according to Claim 1, in which the overlapping zone is tangential to the surface of the headrest, one of the free edges being visible on the exterior of the headrest.
3. A headrest according to Claim 2, in which the said free edge visible on the exterior of the headrest is formed as a hem.
4. A headrest according to Claim 1, in which the free edges are oriented towards the interior of the padding.
5. A headrest according to any one of the preceding claims, in which the free edges extend over the entire periphery of the central aperture.
1 9
6. A process for the manufacture of a headrest according to Claim 1, comprising the steps consisting of:
- positioning the said pieces of fabric in an injection mould; - placing the insert in the injection mould by introducing the insert into the interior space of the cover through the said passage delimited between the free edges of the cover; - pressing the free edges against one another in the region of the aperture of the headrest; and - injecting foam to produce the padding.
7. A process according to Claim 6, in which the step consisting of pressing the free edges against one another consists of making a first edge overlap a second edge over an overlapping area greater than that obtained after injection, at least a part of one of the pieces of fabric not being pressed against the mould before the injection of the foam.
8. A process according to Claim 7, in which the first edge is formed as a hem and is visible on the exterior of the headrest, the second edge being formed as a clean cut and belonging to the piece of fabric not pressed on the mould before injection.
9. A process according to Claim 8, in which, during the injection step, the second edge slides along the first edge and the piece of fabric initially not pressed against the mould is pushed back against the said mould.
10. A process according to Claim 6, in which the step consisting of pressing the free edges against one another consists of placing at least one flexible strip radially in the mould and of turning back the two edges towards the interior of the padding while applying them against the said flexible strip.
11. A headrest substantially as hereinbefore, described with reference to any one of the accompanying drawings.
12. A process for manufacturing a headrest substantially as hereinbefore described.
GB9816065A 1997-07-28 1998-07-24 Vehicle headrest with aperture & process for makning it Withdrawn GB2327602A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9709571A FR2766431B1 (en) 1997-07-28 1997-07-28 ADJUSTED HEADREST AND MANUFACTURING METHOD THEREOF

Publications (2)

Publication Number Publication Date
GB9816065D0 GB9816065D0 (en) 1998-09-23
GB2327602A true GB2327602A (en) 1999-02-03

Family

ID=9509707

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9816065A Withdrawn GB2327602A (en) 1997-07-28 1998-07-24 Vehicle headrest with aperture & process for makning it

Country Status (3)

Country Link
DE (1) DE19833721A1 (en)
FR (1) FR2766431B1 (en)
GB (1) GB2327602A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2338676A (en) * 1998-04-30 1999-12-29 Ikeda Bussan Co Apertured vehicle headrest
GB2333261B (en) * 1997-12-31 2002-10-23 Tachi S Co Headrest and method for forming the same
CN104441389A (en) * 2014-12-11 2015-03-25 重庆宏立至信汽车部件制造有限公司 Seat headrest vertical foaming mold
US9457698B2 (en) 2014-02-27 2016-10-04 Nissan North America, Inc. Headrest support rod and method of making a headrest
CN116079970A (en) * 2023-02-02 2023-05-09 东莞市乐星电子有限公司 Method for manufacturing hindbrain pad

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0322374A1 (en) * 1987-12-21 1989-06-28 Gestind M.B. Manifattura Di Bruzolo S.P.A A headrest for motor vehicle seats
US4908170A (en) * 1987-05-23 1990-03-13 Tokai Chemical Industries, Ltd. Method of producing an annular foam product
US5004572A (en) * 1987-11-20 1991-04-02 Tokai Chemical Industries, Ltd. Method of producing skin tube for annular foam product, and assembly of the skin tube and core structure
EP0684154A1 (en) * 1994-05-26 1995-11-29 Centre D'etudes Et Recherche Pour L'automobile ( Cera) Process for making a toric envelope, especially for a car headrest

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3527540A1 (en) * 1985-08-01 1987-02-12 Grammer Sitzsysteme Gmbh METHOD FOR PRODUCING A UPHOLSTERY ELEMENT AND DEVICE FOR CARRYING OUT THIS METHOD
JPS6235811A (en) * 1985-08-09 1987-02-16 Tokai Kasei Kogyo Kk Manufacture of integral expansion molded part
IT1211382B (en) * 1987-10-05 1989-10-18 Fiat Auto Spa HEADREST FOR VEHICLE SEATS, PARTICULARLY CARS

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4908170A (en) * 1987-05-23 1990-03-13 Tokai Chemical Industries, Ltd. Method of producing an annular foam product
US5004572A (en) * 1987-11-20 1991-04-02 Tokai Chemical Industries, Ltd. Method of producing skin tube for annular foam product, and assembly of the skin tube and core structure
EP0322374A1 (en) * 1987-12-21 1989-06-28 Gestind M.B. Manifattura Di Bruzolo S.P.A A headrest for motor vehicle seats
EP0684154A1 (en) * 1994-05-26 1995-11-29 Centre D'etudes Et Recherche Pour L'automobile ( Cera) Process for making a toric envelope, especially for a car headrest

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2333261B (en) * 1997-12-31 2002-10-23 Tachi S Co Headrest and method for forming the same
GB2338676A (en) * 1998-04-30 1999-12-29 Ikeda Bussan Co Apertured vehicle headrest
GB2338676B (en) * 1998-04-30 2000-05-17 Ikeda Bussan Co Apertured headrest and method of producing same
US9457698B2 (en) 2014-02-27 2016-10-04 Nissan North America, Inc. Headrest support rod and method of making a headrest
CN104441389A (en) * 2014-12-11 2015-03-25 重庆宏立至信汽车部件制造有限公司 Seat headrest vertical foaming mold
CN104441389B (en) * 2014-12-11 2016-08-24 重庆宏立至信汽车部件制造有限公司 Chair headrest vertical-foaming mould
CN116079970A (en) * 2023-02-02 2023-05-09 东莞市乐星电子有限公司 Method for manufacturing hindbrain pad

Also Published As

Publication number Publication date
FR2766431B1 (en) 1999-10-01
DE19833721A1 (en) 1999-02-25
GB9816065D0 (en) 1998-09-23
FR2766431A1 (en) 1999-01-29

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