JPH09108066A - Headrest foamed integrally with skin material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for preparing a headrest wherein there exists no possibility of leakage of a foamable stock soln. from a pouring hole which serves both a frame inserting hole and the pouring hole for the foamable stock soln. and is excellent for hermeticity and a partial overlapping part is prevented from being generated and snaking and failure of appearance such as lifting are prevented from being generated due to difference in foaming pressure. SOLUTION: The one end edge 12a of a pouring hole 12 of a skin material 11 of a headrest is folded back to the inside and the first sewn part 14 is formed by performing a folded-back sewing only on the one end edge 12a side of the hole 12. The end part being on the extended line in the left and right direction of the hole 12 and the folded sewing of the one end edge 12a side of the pouring hole 12 form the second sewn part 16 wherein the folded sewing of the one end edge 12a is brought into contact with the surface side of another end edge 12b and both end edges 12a and 12b are integrally sewn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam headrest integrated with a skin material. More specifically, the headrest frame and a stay connected to the headrest frame are inserted through an injection port of the skin material of the headrest. With the tip end side of the skin protruding and protruding from the stay insertion hole of the skin material, insert and hold the skin material in the foam molding die, and inject the foaming undiluted solution from the injection port formed in the skin material of the headrest. The present invention relates to a skin material integrated foam headrest formed by integrally foaming a pad material.

[0002]

2. Description of the Related Art A conventional foam headrest integrated with a skin material is:
For example, as shown in FIGS. 3 (a), 3 (b) and 3 (c) respectively, a frame insertion / foaming stock solution injection port 5 is formed on the stay protruding surface 1a side of the headrest skin material 1 to form a headrest stay. The headrest frame 2 formed in a U shape by the rod portions 2a, 2a (only one of which is shown) and the central rod portion 2b connecting the vertical rod portions 2a, 2a at its lower end side serves to insert the skin material 1 into the frame. Foaming stock solution inlet 5
Insert more.

In order to prevent the foaming undiluted solution 3a from leaking to the outside from the frame insertion / foaming undiluted solution injection port 5 of the skin material 1, the injection port 5 is formed by folding back the edges 5a and 5b of the skin material 1 respectively. Has been done. The frame 2 is inserted from the frame insertion / foaming stock solution injection port 5 and the vertical rod 2
With the front end side of a, 2a protruding outward from the insertion holes 1b, 1b (only one is shown), the skin material 1 is arranged in the foaming mold, and foaming is performed from the frame insertion / foaming stock solution injection port 5. After the injection head for injecting the stock solution 3a is inserted to inject the foaming stock solution 3a into the skin material 1, the injection head is pulled out, and then the pad material 3 is foam-molded by foaming cure treatment.

[0004]

However, when the frame insertion / foaming stock solution injection port 5 is provided, the injection port 5 is separately provided.
Although there is an advantage that it is not necessary to close the work piece with a closing member or the like, there is a fear that the bending directions of the edges 5a and 5b of the injection port 5 of the skin material 1 are not stable. That is, FIG.
As shown in (b), the edge 5a of the skin material 1 is partially folded back due to foaming pressure, or the edge 5a of the skin material 1 is folded.
In the state in which b is hung down, and as shown in FIG. 3C, the edge 5a of the skin material 1 is partially folded back,
The edge 5b overlaps with the partially folded edge 5a, which may cause meandering due to a difference in foaming pressure at a partially overlapped portion after foam molding, or may cause appearance defects such as floating. Had.

The present invention has been made by paying attention to the unsolved problem of the above-mentioned conventional example, and there is a risk that the foaming stock solution leaks from the injection port while using both the frame insertion port and the foaming stock solution injection port. To provide a foam headrest integrated with a skin material, which has excellent sealing property, prevents the occurrence of a partial overlapping portion, and does not cause a meandering due to a difference in foaming pressure or a defective appearance such as floating. It is an object.

[0006]

In order to achieve the above-mentioned object, the foam headrest integrated with skin material according to claim 1 of the present invention is connected to the headrest frame from the inlet of the skin material of the headrest, and the headrest frame. With the stay inserted, the tip side of the headrest stay is projected outward from the stay insertion hole of the skin material and inserted and held, and the skin material is placed on the foam molding die. In the foam headrest integrated with the skin material formed by integrally foaming the pad material by injecting the foaming undiluted solution from the inlet, only one edge side of the inlet is folded back and sewn inward, and the extension line in the left-right direction of the inlet is the inlet. Along with the fold stitch on the one end edge side, the fold stitch on the one end edge side is brought into contact with the surface side on the other end edge side so that both end edges are integrally sewn, and the both end edges are integrally sewn. Ri inlet is characterized in that it is sealed.

According to the first aspect of the present invention, the injection port of the skin material of the headrest is sewn inward only at one edge side, and the extension line in the left-right direction of the injection port is fold-sewn on the one edge side of the injection port together with the one edge side. Since both ends are sewn together by bringing the other end side into contact with the fold-back sewn, after both ends of the foaming raw material injection, both ends of the skin material are folded back inside the injection port at both ends. The edge is biased outward on the extension of the inlet to seal the skin inlet with a uniform shape.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A skin material-integrated foam headrest according to the present invention will be described below with reference to the drawings. FIG.
(A), (b) and (c) show the skin material 11 applied to the skin material-integrated foam headrest according to the present invention.

Here, the skin material 11 of the headrest is formed in a bag shape, and a pair of insertion holes 11b and 11c for inserting the headrest stay are formed on the side of the stay protruding surface 11a which is the lower surface side when the seat is mounted. A frame insertion / injection port 12 extending to the vicinity of the edge is formed in parallel with a line connecting the centers of the insertion holes 11b and 11c. Here, the frame insertion / injection port 12 has an inward edge 1 so that it extends inwardly along the opening edge.
2a and 12b are formed respectively.

In FIG. 1 (a) showing the bottom of the skin material 11, the length of the frame insertion / injection port 12 is indicated by L1.
Only the one end edge 12a side of the injection port 12 which is within the range of the length L1 of the frame insertion / injection port 12 is folded back and sewn inward to form the first sewing portion 14 as shown in FIG. 1 (c). The other end edge 12b is not formed with the folded stitch in the range of the length L1.

On the left-right extension of the inlet 12,
As shown in FIG. 1 (b), one end edge 1 is formed together with the first sewing portion 14 by the return stitch on the one end edge 12 a side of the injection port 12.
A second sewn portion 16 in which both end edges 12a and 12b are integrally sewn is formed by bringing the front surface side of the other end edge 12b side into contact with the first sewn portion 14 by fold-back stitching on the 2a side.
The second sewn portion 16 is formed in the range of the length L2 as shown in FIG.

The length L1 of the frame insertion / injection port 12
The length L2 of the second sewn portion 16 can be appropriately set, and the length L1 of the frame insertion / injection port 12 and the length L2 of the second sewn portion 16 can be formed shorter than those shown in the figure. it can.

A vertical rod portion 18a for forming a headrest stay similar to the above-mentioned conventional example in the skin material 11,
A frame 18 formed in a substantially U shape by 18a and a central rod portion 18b forming a headrest frame connecting them is inserted and held in the skin material 11.

Vertical rods 18a, 18 of the frame 18
a is inserted into the frame insertion / injection port 12 from the tip side,
From the pair of insertion holes 11b and 11c to the vertical rods 18a and 18
The central rods 18b are inserted and held in the skin material 11 in a state in which a is projected to the outside. The shape of the frame 18 is not limited to the one shown in the figure, and the vertical rods 18a, 18a forming the headrest stay and the central rod 18b forming the headrest frame are separately fixed. It may be one.

FIGS. 2 (a), 2 (b) and 2 (c) are sectional views of a foam molding die showing an embodiment of a foam molding method for a skin material integrated foam headrest according to the present invention. The foam molding die 21 of the headrest includes a lower die 22 into which the skin material 11 of the headrest can be inserted, and an upper die 23 that is matched with the lower die 22. The upper die 23 is formed into a split die, Two
It is composed of one half portion 23a and the other half portion 23b attached to the upper end of one side by a hinge 25 so as to be openable and closable.

Then, as shown in FIG. 2A, the skin material 11 having the frame 18 therein is inserted into the lower mold 22 with the other half portion 23b of the upper mold 23 opened, and the frame 18 is inserted. Vertical rod portion 18a as a headrest stay of
18a is held by one half 23a of the upper mold 23. In this state, the frame insertion / injection port 12 is pulled in the left-right direction and is linearly closed.

In this state, as shown in FIG. 2 (b), the central portion of the frame insertion / injection port 12 is expanded in the front-back direction, that is, the other end edge 12b side of the injection port 12 is pressed downward to make the urethane raw material. The tip of the injection head 31 for injecting the foaming undiluted solution 13a is inserted, and the foaming undiluted solution 13a is injected into the skin material 11.

Then, when the injection of the foaming stock solution 13a is completed and the injection head 31 is pulled out from the frame insertion / injection port 12, the frame insertion / injection port 12 is opened as shown in FIG.
As shown in (b), due to the presence of the second sewn portion 16 that integrally sew both end edges 12a, 12b, both ends folded back to the inside of the inlet 12 at both end portions on the stay protruding surface 11a side of the skin material 11. The edges 12a, 12b are urged outward on the extension line of the injection port 12, and the surface side of the other end edge 12b of the injection port 12 is again brought into contact with the side of the first sewing portion 14 by the folded stitch on the side of the one end edge 12a. And the inlet 1 of the skin material 11
2 is sealed again with a uniform shape.

Next, the other half portion 23b of the upper mold 23 is clamped to mold the two end edges 12 of the injection port 12 of the skin material 11.
When the a and 12b are urged in a fixed direction and an outward tension is applied to the end of the inlet 12, and the foaming stock solution 13a is prevented from leaking, the foaming stock solution 13a is foamed and cured. 2 (c), the pad material 1 in which the injection port 12 is closed while keeping a straight line shape, as shown in FIG.
3 can be integrally molded.

[0020]

As described above, according to the first aspect of the present invention, the inlet of the skin material of the headrest is sewn inward only at one edge side, and one end of the inlet is on the extension line in the left-right direction of the inlet. Along with the fold-back stitch on the edge side, the fold-back stitch on one end edge side is brought into contact with the surface side on the other end edge side to sew both end edges integrally, and the fill port is sealed by the integral sewing of both end edges. There is no risk of the foaming undiluted liquid leaking out, it has excellent sealing performance, it prevents the occurrence of partial overlaps, and there is no risk of causing meandering due to the difference in foaming pressure or causing poor appearance such as floating. It is possible to obtain a material-integrated foam headrest.

[Brief description of the drawings]

1A and 1B show a skin material of a foam headrest integrated with a skin material according to the present invention, wherein FIG. 1A is a bottom view of the skin material, FIG. 1B is a cross-sectional view of both edges of the integrally sewn portion, and FIG. Cross-sectional view of the inlet side.

2A and 2B show an embodiment of a foam molding method for a foam headrest integrated with a skin material according to the present invention, in which FIG. 2A is a cross-sectional view of a foam molding die in which the skin material is disposed, and FIG. Sectional view of the state where the foaming undiluted solution is injected into the material, (c)
FIG. 3 is a cross-sectional view of a foamed pad material.

FIG. 3 is a view showing a conventional foam headrest integrated with a skin material, in which (a) is a partial sectional perspective view, (b) is a partial sectional view, and (c) is a sectional view of another portion.

[Explanation of symbols]

 11 skin material 11a stay protruding surface 11b insertion hole 11c insertion hole 12 frame insertion / injection port 12a one end edge 12b other end edge 13 pad material 13a foaming concentrate 14 first sewing portion 16 second sewing portion 18 frame 18a vertical rod portion 18b Central rod part 21 Foaming mold 22 Lower mold 23 Upper mold 31 Injection head

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location // B29K 105: 04 B29L 31:58

Claims (1)

[Claims] 1. A headrest frame and a stay connected to the headrest frame are inserted from a skin material injection port of the headrest, and a tip end side of the headrest stay is projected outward from a stay insertion hole of the skin material and is retained. In this state, the skin material is arranged in the foam molding die, and the foam material undiluted liquid is injected from the injection port formed in the skin material of the headrest to integrally foam the pad material to form the skin material integrated foam headrest, Only the one edge side of the inlet is sewn inward, and on the extension line in the left-right direction of the inlet, together with the fold stitch on the one edge side of the inlet, the fold stitch on the one edge side is brought into contact with the surface side of the other edge side Is integrally sewn, and the injection port is sealed by integrally sewing both edges thereof.