JPH0233397B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an improvement in a method for attaching a skin material to a headrest for a vehicle, and makes it possible to reliably position the core frame and the skin material during the manufacture of a headrest that is safe during use.

[Conventional technology and issues to be solved]

As shown in the cross-sectional view of FIG. 4, the headrest for a vehicle includes a frame 1, etc., which has a U-shaped cross section, etc., provided on a stay 2, and a pad 5.
In many cases, it is buried inside (for example, the
-8154, JP-A-55-63239). With such a structure, during manufacturing, the positioning of the skin material and the core frame is done using the foam mold of the pad, which makes the positioning of the core frame within the pad unstable, and the fourth As shown by the two-dot chain line in the figure, there are many cases of misalignment, which inevitably results in inaccurate product shapes. Also, during manufacturing, it is difficult to fix the edges of the skin material.
A fixture is required to bring the edge of the skin material hanging down inside the mold into close contact with the inner surface of the mold body.
Moreover, the installation operation required extra effort.

[Means to solve the problem]

The present invention solves the above-mentioned conventional difficulties, and its manufacturing feature is that a hollow skin material is molded into a shape corresponding to the outer shape of a headrest that is height-adjustably installed above the back seat of a seat. Insert the core frame integrally formed with the flange forming the lower surface of the head rest into the hollow part of the skin material, place the flange part in the hollow part of the skin material, and then turn the flange part upward. In a method for attaching a skin material of a headrest for a vehicle, in which a core frame and a skin material are integrated through the foamed resin by injecting and foaming a foamed resin stock solution into the hollow portion, the headrest is attached to the flange portion 8. A plurality of protrusions 10 protruding outward, a foamed resin stock solution injection port 9, and a plurality of gas vent holes 20 are provided, and the protrusions 10 are provided near the opening of the hollow part of the skin material 6.
When the flange portion 8 is placed in the hollow opening of the skin material 6, the protrusion 10 is fitted into the hole 18 of the skin material, so that the flange portion 8 is connected to the skin material. The purpose is to position 6.

【Example】

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method for attaching a skin material to a headrest for a vehicle according to the present invention will be explained in detail below with reference to illustrative drawings. FIG. 1 is a longitudinal sectional view of a vehicle headrest employing the skin material assembly method according to the present invention. Figure 2 is an exploded perspective view of the core frame and bottom plate.
FIG. 3 is a partial perspective view of the bottom of the core frame.
In these figures, the stay 2 is fixed to the backseat 3 side of the seat. In this vehicle headrest, a core frame 4 is embedded in a headrest pad 5 made of urethane foam or the like, and the surface of the headrest pad 5 is covered with a skin material 6. The core frame 4 is a flat hollow body that is open downward.
The lower open surface serves as a stay insertion opening 7. A flange portion 8 is formed around it. The flange portion 8 is provided with an injection port 9 for injecting a urethane stock solution as a foamed resin liquid during manufacturing, and a plurality of gas vent holes 20 (six in this case), and is further provided with a plurality of positioning protrusions 10 to be described later. -ing Vertical ribs 11 for reinforcement are provided at appropriate intervals on the side wall of the core frame 4, and a loop-shaped projecting piece 12 is also provided. The loop-shaped protruding piece 12 is for improving the adhesiveness between the core frame and the urethane foam.

[Effect]

The effect when the method of attaching the skin material of the present invention to the vehicle headrest having the above structure is adopted is as follows. First, for the positioning projection 10 of the core frame 4, a hole 18 is provided on the outer periphery of the lower end of the skin material to fit the projection, and the hole 18 is fitted with the projection. This allows the position of the core frame to be determined. Next, when injecting the urethane stock solution,
Turn the core frame 4 in the opposite direction as shown in Fig. 3 and attach the flange part 8.
Place the skin material 6 facing upward into the mold containing the skin material 6 along with the mold of the headrest, align the positioning protrusion 10 of the flange portion 8 with the hole in the skin material, and insert a presser foot with approximately the same shape as the bottom plate 13 from above. The surface is held between plates and injected from the injection port 9 into the space between the outside of the core frame and the skin material. Internal air and generated gas accompanying the injection escape upward through the gas vent hole 20, and the foam is completely filled and bonded to integrate the skin material and the core frame. At this time, the skin material 6 is always positioned at the same position with respect to the flange part 8 by fitting the hole 18 into the positioning protrusion 10 of the flange part 8, so that the skin material 6 is always positioned at the same position with respect to the flange part 8. On the other hand, the skin material 6 does not shift from its normal position, and the product shape is always stable. The bottom plate 13 has the above-mentioned positioning protrusion 10 for the core frame 4.
A plurality of hole-shaped protrusions 19 are provided at positions corresponding to the above, and the core frame 4 and the bottom plate 13 are fixed with screws 17 or the like while sandwiching the end portion of the skin material 6. Therefore, there is no shift of the skin material, and there is no need to clean up the edges. In the headrest in which the core frame 4 as described above is embedded, the stay 2 fixed to the back seat side is installed in the hollow part of the core frame 4. For this purpose, a bottom plate 13 is attached to the stay 2. As is clear from FIGS. 1 and 2, the bottom plate 13 is provided with cylindrical stay insertion portions 14, 14 near both ends of the rectangular plate. Therefore, the height of the headrest can be easily changed by sliding the headrest integrated with the core frame 4 and the bottom plate 13 on the stay 2 through the insertion portion 14. Further, since the bottom plate 13 is formed with ribs 16 in the vertical direction for reinforcement, it can withstand injection pressure sufficiently and the strength of the product after molding is increased.

【Effect of the invention】

Since the method for attaching the skin material of a headrest for a vehicle according to the present invention is based on the structure as described in detail above, it eliminates the need for a fitting in the mold for the edge of the skin material, which was a difficult point when manufacturing the headrest. In addition, the positioning of the core frame within the skin material is ensured, making it possible to stabilize the product shape and improve quality. Furthermore, since the structure is simple, the number of assembly steps can be reduced.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a vehicle headrest obtained by employing the skin material assembly method according to the present invention. FIG. 2 is an exploded perspective view of the core frame and the bottom plate, and FIG. 3 is a partial perspective view of the bottom of the core frame. FIG. 4 is a longitudinal sectional view of a conventional headrest. 2... Stay, 4... Core frame, 5... Headrest pad, 6... Skin material, 7... Stay insertion port, 8
...Flange part, 9...Inlet, 10...Protrusion, 11...
Vertical rib, 12... Projection piece, 13... Bottom plate, 14... Stay insertion part, 15... Stay insertion hole, 16... Rib, 1
7... Screw, 18... Hole provided in the skin material, 19... Hole-shaped protrusion receiver, 20... Gas vent hole.

Claims (1)

[Claims] 1 A hollow skin material is inscribed in a mold corresponding to the external shape of a headrest that is height-adjustably installed above the back seat of the seat, and a core frame formed integrally with the flange portion forming the lower surface of the headrest is formed in the hollow of the skin material. After inserting the flange into the hollow opening of the skin material, the foamed resin stock solution is injected into the hollow with the flange facing up and foamed, thereby allowing the core to pass through the foamed resin. In a method for attaching a skin material to a headrest for a vehicle in which a frame and a skin material are integrated, a plurality of protrusions 10 projecting outward from the headrest are provided on the flange portion 8.
In addition to providing a foamed resin stock solution injection port 9 and a plurality of gas vent holes 20, a hole 18 that fits into the protrusion 10 is provided near the opening of the hollow part of the skin material 6, and the flange part 8 is connected to the hollow part of the skin material 6. A method for attaching a skin material to a headrest for a vehicle, characterized in that the skin material 6 is positioned relative to the flange portion 8 by fitting the protrusion 10 into the hole 18 of the skin material when disposed in the opening.