JP4965183B2 - Headrest - Google Patents

Description

The invention, for example, about the headless bets for a motor vehicle seat of.

  For example, what was indicated by patent documents 1 is proposed as a headrest of a seat sheet of a car. The trim cover of the headrest is sewn into a bag shape by joining a plurality of fabrics cut into a predetermined shape.

In such a headrest, even if it is the same design, for example, there may be prepared a specification for performing a treatment for imparting an antiallergic function to the skin layer of the cover and a specification for not performing it.
JP 2002-165670 A

However, since the shape and color of the treatment as described above hardly change, it is very difficult to distinguish with the naked eye whether or not the surface treatment has been performed. For this reason, it is difficult to manage the type of the cover alone and the headrest in each process of manufacturing, inventory, and shipping. For example, in the process of assembling the headrest to the seat back of a seat of an automobile, there is a problem that the specification of the headrest may be mistaken and there is a risk of erroneous assembly.

  In order to solve the above problem, an identification label for identifying the type of specification can be attached to the surface of the cover of the headrest, but a process of manufacturing the identification label and a process of attaching the identification label to the cover Therefore, there is a problem in that the appearance of the headrest is impaired because the identification label is easily noticeable in addition to directly increasing the manufacturing cost.

  The above-mentioned problem is a problem that also occurs in various molded products in which a cushion material and an insert member are accommodated inside a cover such as an armrest provided on a seat back of a seat seat or a side portion of the seat seat.

The object of the present invention is to solve the above-mentioned problems in the prior art, to provide an identification means for identifying the cover type at low cost, and to easily manage the cover type. can, moreover, is to provide a Ruhe Ddoresuto can be prevented from appearance is impaired.

In order to solve the above problem, the invention according to claim 1 is a state in which the base end portion of the headrest stay is accommodated in the bag-shaped cover and the two leg portions are projected outside the cover. In the headrest in which the foamed synthetic resin raw material is injected into the cover and foam-molded to accommodate the cushioning material, the foamed synthetic resin raw material injection port of the bag-shaped cover is bent inside the cover. A slit-shaped opening is formed by the pair of opening forming pieces, and an identification stitch is applied across the opening forming piece and an outer surface of a cover connected to the opening forming piece via a bent portion. The gist is that the start and end of the stitch are set in the middle of the width direction of the opening forming piece .

The invention according to claim 2 is the invention according to claim 1, wherein a shielding adhesive sheet for shielding a needle hole of the identification stitch is provided on the back surface of the outer surface of the cover on which the identification stitch is applied. the gist that you are.

The gist of a third aspect of the present invention is that, in the first or second aspect, the identification yarn forming the identification stitch is of a color different from the color of the outer surface of the cover .

( Function)
According to the first aspect of the present invention, it is possible to prevent erroneous assembly of a headrest that is foam-molded by injecting a foamed synthetic resin material into a bag-like cover with respect to an automobile seat back.

In addition , since the identification stitch is applied over the opening forming piece and the outer surface of the cover connected to the forming piece via the bent portion, the start and end of the stitch are not exposed to the outside of the cover. As a result, it is difficult for the two ends to be unraveled and the appearance of the stitches can be improved.

Furthermore , since the start end and the end of the identification stitch are formed halfway in the width direction of the opening forming piece, the identification stitch between the middle of the opening forming pieces and the leading edge is not formed. Grooves due to biting into the surface of the cover of the identification yarn forming the identification stitch do not occur at the contact interface. Therefore, when the cover is set in a mold, the foam synthetic resin raw material is injected into the cover from the opening, and the cushion material is foam-molded by the foam synthetic resin raw material, the stitches of the both opening forming pieces are stitched The portions where no foam is formed are pressed against each other by the foamed synthetic resin raw material to close the slit-shaped opening, thereby preventing the foamed synthetic resin raw material from leaking out of the cover.

The invention according to claim 2, in sewing process of the identification stitch on the back surface of the outer surface of the cover, since needle hole formed by the sewing needle in the cover piece is shielded by the shielding pressure-sensitive adhesive sheet, When the above-described cushion material is foam-molded, the foamed synthetic resin material is prevented from leaking from the gap left in the needle hole.

And since it is a shielding adhesive sheet, while being able to reduce cost, attachment of an adhesive sheet can be performed easily.

According to the invention of the headrest according to any one of claims 1 to 3 , an erroneous assembly of the headrest that is foam-molded by injecting a foamed synthetic resin material into a bag-like cover with respect to the seat back of the automobile. Can be prevented.

Hereinafter, an embodiment in which the present invention is embodied in a cover and a headrest of a headrest as a molded product will be described with reference to FIGS.
As shown in FIG. 1, the headrest to be mounted on the vehicle seat of this embodiment includes a bag-like headrest cover 11, a base end portion 12 a inside the cover 11, and formed on the bottom surface of the cover 11. The headrest stay 12 has two leg portions 12b projecting outward from the two stay holes 11a, and the cushion material 13 accommodated inside the headrest stay 12. The cushion material 13 is formed by foaming a foamed synthetic resin material injected into the cover 11 from a slit-shaped opening 11b formed in the bottom surface of the cover 11.

  As shown in FIG. 2, the cover 11 includes a first cover piece 14 that forms a front face 14a and a front bottom face 14b that receive the back of the occupant, and a second cover piece 15 that forms a back face 15a and left and right side faces 15b. The seam allowance of each peripheral edge with the third cover piece 16 forming the rear bottom surface 16a is sewn with a sewing thread 17 shown in FIGS. 3 and 4 to form a bag shape as a whole. As shown in FIG. 2, an opening forming piece 14 c is formed at the rear end edge of the front bottom surface 14 b of the first cover piece 14, and the opening forming piece 14 c is formed at the front end edge of the third cover piece 16. A corresponding opening forming piece 16b is formed. Then, both end edges of the opening forming pieces 14c and 16b are sewn with a sewing thread 18 shown in FIG. 3, and a slit-like opening 11b is formed between the opening forming pieces 14c and 16b.

When the cover 11 is manufactured, the sewing work is performed in a state where the front and back sides of the cover pieces 14 to 16 are reversed, and the cover 11 in an inverted state is inverted using the opening 11b.
The fabric constituting the first to third cover pieces 14 to 16 is composed of a skin layer 21 composed of a fabric or the like as shown in FIG. 4 and, for example, polyurethane foam laminated on the inside of the skin layer 21. And an intermediate layer 22 made of slab. Further, inside the intermediate layer 22, the foamed synthetic resin material 13 a injected into the cover 11 from the opening 11 b is prevented from penetrating into the intermediate layer 22 and the skin layer 21 in the molding process of the cushion material 13 to be described later. A thin film layer 23 made of polyurethane is attached.

Next, the configuration of the main part of the present invention will be described.
The cover 11 is provided with a specification with surface treatment and a specification with no surface treatment. The identification stitch 25 is applied only to the cover 11 having a surface-treated specification. Note that the identification stitch 25 may be applied only to the cover 11 having a specification that is not subjected to the surface treatment. As the surface treatment, for example, there is an antiallergic surface treatment. Since this surface treatment is difficult to identify with the naked eye, the identification stitch 25 is provided. That is, as shown in FIG. 2, identification stitches 25 are applied to the rear bottom surface 16a and the opening forming piece 16b of the third cover piece 16. The identification stitch 25 is formed in a flat U-shape as a whole, and the sewing start end (start end) 25a and the sewing end end (end end) 25b are the width of the opening forming piece 16b as shown in FIGS. It is set in the middle of the W direction.

  As the identification yarn forming the identification stitch 25, it is preferable to use a yarn having a color different from the color of the skin layer 21. The back surface of the rear bottom surface 16a of the third cover piece 16 is coated with an adhesive as a needle hole shielding means for shielding the gap between the needle holes formed when the sewing needle penetrates the third cover piece 16. The shielding pressure-sensitive adhesive sheet 26 is adhered.

Next, the cushion material 13 is formed as follows.
That is, as shown in FIG. 4, the cover 11 on which the headrest stay 12 is mounted is set on the lower molds 31 and 32 with the opening 11 b facing upward, and the headrest stay 12 is held on the upper mold 33. In this state, the foamed synthetic resin raw material 13a is injected into the inside of the cover 11 through a nozzle inserted in the opening 11b from an injection port (not shown) formed in the upper mold 33, and foamed. In this way, the cushion material 13 is foam-molded.

According to the headrest cover 11 of the above embodiment, the following effects can be obtained.
(1) In the above embodiment, the identification stitch 25 indicating the difference in specifications is applied to the skin layer 21 of the cover 11 on the rear bottom surface 16 a of the third cover piece 16. For this reason, even if it is difficult to identify the specification of the skin layer 21 with the naked eye, the specification of the cover 11 can be easily identified by the presence or absence of the identification stitch 25. Therefore, the management of the types of the cover 11 and the headrest in the inventory, transportation, assembly process, etc. can be performed easily and without error, and erroneous assembly of the headrest can be prevented.

  (2) In the above embodiment, the identification stitch 25 can be applied at the time of sewing for sewing the cover pieces 14, 15, 16. Since it does not increase, cost increase can be suppressed.

  (3) In the above embodiment, since the identification stitch 25 is provided on the rear bottom surface 16a of the third cover piece 16, the identification stitch 25 may be inconspicuous in a use state in which the headrest is assembled to the seat back. Therefore, it can suppress that the external appearance of a headrest is impaired.

  (4) In the above embodiment, the start end 25a and the end end 25b of the identification stitch 25 are formed in the opening forming piece 16b, and the intermediate portion of the identification stitch 25 is bent into the opening forming pieces 14c and 16b and the forming piece. It applied over the outer surface of the cover 11 connected through the part. For this reason, even if the start end 25a and the end 25b are sewn, the portions are blocked by the opening forming piece 14c and are not exposed, so that the appearance can be prevented from being deteriorated, and the start 25a and the end 25b are It can be difficult to understand. Even if the unraveling occurs, the unraveling fits into the slit-shaped opening 11 b, so that the unraveling can be prevented from propagating to the exposed portion of the identification stitch 25.

  (5) In the above embodiment, the start end 25a and the end end 25b of the identification stitch 25 are stopped in the middle of the opening forming piece 16b. For this reason, when the cushion material 13 is foamed into the cover 11, the portions of the opening forming pieces 14c and 16b where the stitches 25 are not formed are pressed against each other by the foamed synthetic resin material, thereby closing the slit-shaped opening 11b. Thus, the foamed synthetic resin raw material 13a can be prevented from leaking from the gap between the opening forming pieces 14c and 16b generated by the identification stitch 25.

In addition, you may change the said embodiment as follows.
-As shown in FIG. 5 or FIG. 6, you may embody in the headrest of the shape where the passenger | crew side part protruded below. In this case, since the identification stitch 25 is difficult to see due to the protruding portion, it is possible to prevent the appearance of the cover 11 from being damaged.

  As shown in FIGS. 7A to 7D, the shape of the identification stitch 25 may be changed to, for example, a crescent shape, a long square shape, a circular shape, or an alphabetic symbol. In these cases, back stitches are applied to the start and end of the identification stitch 25.

  The position where the identification stitch 25 is applied may be set at any part other than the bottom surface of the cover 11. In this case, the identification stitch 25 is exposed to the outside. However, if the design is considered so that the identification stitch 25 functions as a kind of decorative stitch, the appearance of the cover 11 is prevented from being damaged. be able to.

-The opening formation piece of the said cover may be abbreviate | omitted, and the cushion material previously shape | molded by the shaping | molding die outside the cover from the opening may be put in a cover.
In the above-described embodiment, the cover 11 is manufactured by sewing the first to third cover pieces 14 to 16. However, the cover 11 is formed by sewing two cover pieces or four cover pieces. Or the cover 11 may be manufactured from a single cover piece.

  -It may replace with the headrest mentioned above and may be embodied in the armrest arrange | positioned at the side part of the seat seat of a motor vehicle. Further, it may be embodied in a seat back of a seat. Furthermore, the present invention may be embodied in various molded products in which cushion materials and insert members are housed inside other covers.

The perspective view seen from the back side showing one embodiment which materialized this invention in the headrest. The separation perspective view of the 1st-3rd cover piece which constitutes a cover. The perspective view which made headrest reverse. Sectional drawing which shows the shaping | molding die of a headrest. The perspective view of the headrest which shows another embodiment of this invention. The perspective view of the headrest which shows another embodiment of this invention. (A)-(d) is a top view which shows another embodiment of the stitch for identification.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Cover, 11b ... Opening, 12 ... Headrest stay, 12a ... Base end part, 12b ... Leg part, 13 ... Cushion material, 13a ... Foam synthetic resin raw material, 14-16 ... Cover piece, 14c, 16b ... Opening formation piece 25 ... Identification stitches, 25a ... Start end, 25b ... End, 26 ... Shielding adhesive sheet.

Claims (3)

The base end of the headrest stay is housed inside the bag-shaped cover, and the foamed synthetic resin material is injected into the cover and foam-molded with the two legs projecting outside the cover. In the headrest where the cushioning material was housed in
The foamed synthetic resin raw material inlet of the bag-shaped cover has a slit-shaped opening formed by a pair of opening forming pieces bent inside the cover,
An identification stitch is applied across the opening forming piece and the outer surface of the cover connected to the opening forming piece via a bent portion, and the start and end of the identification stitch are in the middle of the width direction of the opening forming piece. Headrest characterized by being set to. The headrest according to claim 1, wherein a shielding adhesive sheet for shielding a needle hole of the identification stitch is provided on a back surface of the outer surface of the cover on which the identification stitch is applied. 3. The headrest according to claim 1, wherein the identification yarn forming the identification stitch uses a color different from the color of the outer surface of the cover.

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