JPH0744978B2 - Seat body - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a seat body, and more particularly to an automobile seat body.

Conventional technology and its drawbacks The functional and design requirements for automobile seats, especially bucket seats, are increasing, and at the same time,
The trade-off condition is that cost reduction is required. The present invention addresses this problem. First, a conventional example to be improved will be specifically described.

5a to 5j show this conventional example. First
A cross section taken along the line Va-Va of the seat body shown in plan view in FIG. 5c is shown in FIG. 5a or 5b. FIG. 5a shows that the skin member 4 is entirely adhered on the foamed polyurethane mold 1.
The skin member 4 is formed by laminating and bonding the skin 2 and the wadding 3 in advance. The dots in FIG. 5c and the short diagonal lines in FIGS. 5a and 5b represent the adhesive portion 5. FIG. 5b shows the case where the skin member 4 is only the skin 2.

This seat body is manufactured by a method in which a skin member 4 is first aligned and placed in a foaming mold, and polyurethane is integrally foamed from above to form a mold 1. In general, adhesion is performed by seeping urethane during this integral foaming. However, when the skin member 4 is thin as in the case of FIG. 5b, it is better that the adhesion does not depend on the seepage of urethane.

Such integral foam molding may cause seed defects as schematically shown in FIG. 5d. That is, the first is wrinkle 6a. This is shown in FIG. 5e in a cross section taken along the line cd of FIG. 5d. When the slack of the skin 2 generated in the sepal portion when the seat body is manufactured remains when the mold 1 is formed by integral foaming, the skin 2 and the mold 1 are adhered while the wrinkles 6a are formed.

Secondly, it does not come off or float as shown by 6b in Fig. 5d.
As shown in FIG. 5f, which is a cross-sectional view taken along the line gh in FIG. 5d, this peeling 6b is caused by partial adhesion failure.

Thirdly, there is a depressed cavity indicated by 6c in Fig. 5d. As shown in FIG. 5g, which is a cross-sectional view taken along the line ef of FIG. 5d, a mold depression occurs immediately below the skin 2 during integral foaming, which forms a depression cavity 6c.

Fourth, there are the folds shown at 6d in Figure 5d. This is shown in detail in Fig. 5h, which shows a cross section of the cutting line i-j.

Since the skin member and the mold are bonded to each other, these defects cannot be corrected in many cases, resulting in poor appearance.

Further, as shown in FIG. 5i, when the skin member of the gusset portion A and the skin member of the sepal portion B are sewn with the seam 10, the polyurethane is exposed to the outside through the seam 10 when the mold 1 is integrally foamed. The exuded urethane portion 1a is exposed. This is a serious visual defect.

Further, when the groove 7 shown in FIG. 5d is formed by design in the central portion C of the seat body, as shown in FIG. 5j, the skin member does not sufficiently fit the convex portion 8a of the foam mold 8 and is sharp. It is impossible to form the groove 7 having a proper shape. This is because it is difficult to form sharp corners only by the foaming pressure when the mold 1 is integrally foamed, and the gap 9 remains.

Furthermore, when the button pattern (see FIG. 3c) required for the design is to be formed on the sewage portion C, the wrinkle pattern cannot be produced well by the entire surface adhesion.

The present invention aims to solve the above-mentioned problems in a seat body of the type described above.

Means for Solving the Problems In the seat body of the present invention, the foamed polyurethane mold, which is the cushioning material for the seat, and the skin member are adhered mainly only in the porcelain part, but not in the sepal part and the gusset part. Is characterized by.

EFFECTS OF THE INVENTION According to the present invention, since the skin member and the mold are not bonded to each other in the toe part and the gusset part where wrinkles, creases, peeling or floating easily occur, these defects are fixedly formed. There is no such thing. Further, even if a depressed cavity is generated during the integral foaming of the mold, if the site is not adhered, the repair is easy. Furthermore, the septum and gusset are non-adhesive, and urethane does not seep into the seams.

Embodiments FIGS. 1a to 1d show a first embodiment of the present invention and a modification thereof.

As shown in the plan view of FIG. 1c, in this embodiment, the skin member and the mold 1 are mainly bonded to each other at the sash portion C and the scab portion B extending from the sewage portion to the front corner of the seat. That is, a skin member (in FIG. 1a, the skin 2 and the wadding 3 are laminated and bonded) is placed along a mold surface in a foaming mold (not shown), and polyurethane is foam-molded on the surface to form a foam member (FIG. 1a). The seat body shown in is formed. At this time, a film-like adhesive material (not shown) is preliminarily arranged on the skin member corresponding to the adhesion portion 5, and a non-adhesive sheet (not shown) is arranged on the other portion, and the above-mentioned integral It does foaming. The film-shaped adhesive is fused at the mold temperature during foaming and the urethane foaming temperature. After the mold 1 is completed, the non-adhesive film is removed and the whole is heat-treated, so that the film-like adhesive material melts into the mold 1 and the wadding 3 to form the air-permeable adhesive portion 5. When the skin member has a lower layer such as the wadding 3, this adhesion may be carried out by permeation of urethane during integral foaming. In this case, for example, a hard layer generated by the penetration of urethane may be required as compared with the case where a film adhesive is used. Further, in the case of high-speed foaming, since there is no bleeding, it is not necessary to use a non-adhesive sheet.

FIG. 1b shows the case where the skin member is only the skin 2.

As shown in FIG. 1d, when the groove 7 is to be formed in the design ladle portion C, the skin member is preliminarily pressed and formed into the shape of the groove 7. As shown in FIG. 2e, the foamed mold 8 shown in FIG. 2e is obtained by forming the groove 7 having a sharp shape only with the skin member.
Aligned with the convex part 8a of the (which compliments the groove 7),
In this state, the mold 1 is integrally foamed. By doing so, it is possible to form the sharp groove 7 which does not lose its shape.

In this way, when the adhesive is mainly adhered to the margin portion C and is not adhered to the sepal portion B and the gusset portion A, the aforementioned wrinkles 6a, non-peelable floats 6b, and creases 6d do not occur, and the separable portion is formed during molding. , Even if there is a depressed cavity in the town,
It is easy to turn the skin member up to this portion and repair it.

Even if the wrinkle shown in 6a in Fig. 5d does not occur, the seat body is greatly deformed in the seating part, so fold creases 6d occur, and if the seat is repeatedly seated, this crease is especially noticeable in a large bucket seat body. Wad 6d remains permanently, resulting in poor appearance,
According to the present invention, if this portion is made non-adhesive, the skin member of the sepal portion B can move freely, so that such creases do not occur.

Although it is just the opposite of the above, if the outer skin member is not mold-bonded to the middle part C, the skin may stretch and loosen during repeated seating, and wrinkles may occur. In this case, there is no fear of this, since it is firmly bonded.

In the second embodiment and its modification shown in FIGS. 2a to 2e, the adhesive portion 5 is limited to the porcelain portion C.

The formation of the groove 7 shown in FIG. 2d is similar to that described with reference to FIG. 2e in the first embodiment. But in this case k-
Since the developed length of the skin member of the l part is longer than the length of the skin member of the mn part, the mn part may be contracted to generate wrinkles. If there is such a possibility, m-
The adhesive portion 5 is applied even to the vicinity of the n-th portion to prevent the wrinkle from occurring.

Although this is the same in the first embodiment,
The exudation of urethane in the sewing seam 10 shown in FIG. 5i can be prevented by temporarily arranging the above-mentioned non-adhesive sheet over the entire portion and performing foam molding. This can be applied to prevent seepage from the sewing seam even in the design in which two color skins are selectively used for the sepal portion B and the gourd portion C.

When the non-adhesive sheet is sewn at the same time as the seam 10, the non-adhesive sheet is difficult to thread and prevents urethane from seeping out from the thread and further facilitates attachment of the non-adhesive sheet. Next, after foaming, the non-adhesive sheet has perforations and is easy to remove. Furthermore, if the above-mentioned two-colored skin is located at the portion where the joint portion is bonded, the above film-like adhesive is used to prevent the permeation from perforation.

The third embodiment and its modification shown in FIGS. 3a to 3h are embodiments in which the wadding 3 is adhered only at the porcelain portion C. In the case of FIG. 3a, the wadding 3 is limited to the middle part C, and this wadding 3 and the mold 1
Adhesive part 5 is formed between and. In the case of FIG. 3g, the outer skin 2 and the wadding 3 and the wadding 3 and the mold 1 are bonded only at the core. A gap 11 is formed between the epidermis 2 and the wadding 3 in the septum and the town. Although not shown, there may be a gap between the wadding 3 and the mold 1. In the modified example of FIG. 3h,
In addition to the wadding 3, another wadding 3'is provided only on the sash portion. The skin 2 and the wading 3, the wading 3 and the wading 3 ', and the wadding 3'and the mold 1 are the sewn portion 5, 5 It is glued with '5'.

The waddings 3 and 3'may be integrated.

FIG. 3c shows an example in which the button forming part 12 is provided in the middle part.
FIG. 3e is an enlarged plan view of the button forming portion, FIG. 3f is an enlarged sectional view thereof, and FIG. 3d is a sectional view of the molding die thereof. The button molding portion 12 is formed by adhering the central portion 13 thereof, forming a non-adhesive portion 14 around the central portion 13, and press-molding with a molding die 16. Alternatively, the outer skin 2 and the wadding 3 are formed by molding the button molding portion 12 with a high frequency in advance, and the button molding portion 12 is accurately positioned by inserting the button molding portion 12 into the convex portion corresponding to the molding die 16 in the foam lower mold. Mold. In this way, the wrinkles 15 shown in FIG. 3e naturally occur on the non-adhesive part, and the outer side is excellent, similar to the button stop of homemade furniture. In addition, depending on the specifications, the non-adhesive portion 14 can be further expanded to a flat portion on the surface of the appearance to extend the wrinkles that occur and enhance the decorative effect.

In the fourth embodiment and its modification shown in FIGS. 4a to 4h, it is common that the adhesive portion is only the porcelain portion, but firstly, the sharp vertical groove 17 (4a (Fig.) Is formed by the pressing die 20 shown in Fig. 4e or the die 20 'shown in Fig. 4f, and natural wrinkles 18 are formed in the septum and gusset. This wrinkle is shaped as in Figure 4g or Figure 4h. The wrinkles may be formed after the integral foaming, or may be formed by using a pre-wrinkled sewing machine before the integral foaming. In both cases, the wrinkled portion is not adhered, so that the product has a soft feeling such as gather or pleats.

FIG. 4d shows an example in which a recess 19 is formed in the town, that is, on the side surface of the seat.

The skin member of FIGS. 4e and 4f is formed by molding the groove 17 outside the pre-molding die by high frequency, ultrasonic wave, heat press, etc.
The groove 17 having a sharp shape is obtained by inserting it into the convex portion of 20 ', determining the position, and then performing foaming. Depending on the design, the skins 2 on both sides of the groove 17 are in contact with each other.
While the mold 1 has high specific gravity and high elasticity of HR foam, for example, when the soft wadding 3 having low specific gravity is used, the surface of the seat body becomes a soft touch, and the product has a good feeling. This can also be done for waddings with button formations.

In the above-mentioned embodiments, the mold is described as an integral foam, but it may be a preformed mold or an elastic body in which slabs or fibers are bonded and molded with latex or the like. In this case, the adhesive may be a film adhesive, a heat-fusible powder such as nylon, or a general adhesive.

Further, the present invention is not limited to seat bodies, but can be applied to vehicle interior parts (door pads, headrests, instrument panels, armrests, etc.) and furniture.

EFFECTS OF THE INVENTION According to the present invention described above, an excellent product without wrinkles, non-peeling wrinkles, depressions, and creases can be obtained. In particular, even if a mold recessed cavity is created, the unbonded skin member can be peeled off to repair this cavity, improving the yield of the product and providing a stable product at low cost. obtain.

[Brief description of drawings]

FIG. 1a is a sectional view of the seat body according to the first embodiment of the present invention, FIG.
FIG. 1 is a cross-sectional view of a modified seat body without wadding, FIG. 1c is a plan view of the first embodiment, and FIG. 1d is a plan view similar to FIG. 1c but showing a skin having a groove, 2a is a sectional view of a second embodiment of the present invention, FIG. 2b is a sectional view of a modification thereof, FIG. 2c is a plan view of the second embodiment, and FIG. 2d is a sectional view of a groove 7 formed. 2 is a plan view of the second embodiment, FIG. 2e is a plan view of FIG.
2c is an enlarged sectional view taken along the line ab of FIG. 2c, FIG. 3a is a sectional view of a third embodiment of the present invention, FIG. 3b is its plan view, and FIG. 3c is a button formation of this third embodiment. FIG. 3d is an enlarged cross-sectional view showing the button forming part together with the molding die, FIG. 3e is an enlarged plan view of the button forming part, and FIG. 3f is an enlarged cross-sectional view of the central part of the button forming part. FIG. 3g is a sectional view of a modification of the third embodiment, FIG. 3h is a sectional view of the second modification, FIG. 4a is a plan view of the fourth embodiment of the present invention, and FIG. Fig. 4c is a side view of the modified example, Fig. 4d is an enlarged cross-sectional view of the main part of the modified example of Fig. 4c, and Figs. 4e and 4f are for explaining the groove forming means shown in Fig. 4a. FIG. 4g and FIG. 4h are sectional views of the wrinkle forming part in the fourth embodiment, FIG. 5a is a sectional view of a conventional seat body, and FIG. 5b is a sectional view of a modification thereof.
FIG. 5c is a plan view of a conventional seat body, FIG. 5d is a plan view of a conventional seat body having a groove, and FIGS. 5e to 5h are respectively shown in FIG.
5d is an enlarged sectional view taken along the lines cd, gh, ef, and ij, FIG. 5i is an enlarged sectional view of a seat corner, and FIG. 5j is a conventional groove. It is sectional drawing explaining the means to do. 1 ... mold, 2 ... skin, 3 ... wading, 4 ...
… Skin material, 5,5 ′, 5 ″ …… Adhesive part, 6a …… Wrinkles, 6b…
… Peeling off, 6c… Depression cavity, 6d… Folded lines, A… Town part, B… Separation part, C… Meguro part, 7… Groove, 8…
... foam type, 8a ... projection, 9 ... gap, 10 ... seam,
12 ... Button forming part, 13 ... Center part, 14 ... Non-adhesive part,
15 …… Wrinkle, 16 …… Molding mold, 17 …… Groove, 18 …… Wrinkle, 19
...... Concave, 20,20 '…… Molding die.

Claims (15)

[Claims] 1. A seat body characterized in that a foamed polyurethane mold, which is a cushioning material for a seat, and a skin member are adhered to each other mainly at the porcelain portion. 2. The seat body according to claim 1, wherein the polyurethane foam mold is formed by integral foam molding on the skin member. 3. A seat body according to claim 2, wherein a film-like adhesive material is arranged in a portion to be adhered, and the film-like adhesive material is fused to the skin member and the polyurethane foam mold by heating. A seat body characterized by the following. 4. The seat body according to claim 3, wherein a non-adhesive sheet is temporarily placed in a portion which is not adhered. 5. The seat body according to claim 3, wherein integral foaming is performed by high-speed foaming, and temporary disposition of a non-adhesive sheet in a portion which is not bonded is unnecessary. 6. The seat body according to claim 1, wherein an adhesive portion is applied from the sewage portion to the front edge portions of the left and right septum portions. 7. A seat body according to claim 1, wherein wrinkles necessary for design are formed in a portion which is not adhered. 8. A seat body according to claim 1, wherein the skin member is formed by laminating and bonding a skin and a wadding in advance. 9. The seat body according to claim 1, wherein the skin member is a skin only. 10. A seat body according to claim 9, characterized in that a wadding is provided on the edible portion. 11. The seat body according to claim 10, wherein a wadding provided only on the sewage portion is preliminarily bonded to the outer skin by laminating. 12. The seat body according to claim 10, wherein the wadding is adhered to the skin and the foamed polyurethane mold with a film adhesive. 13. The seat body according to claim 1, characterized in that a button-like portion with a wrinkle is formed by forming a button in an annular shape in the margin portion, leaving a non-adhesive portion. Seat body. 14. A seat body according to claim 1, wherein a foamed polyurethane mold is prepared in advance,
A seat body characterized by having a skin member adhered thereto. 15. The seat body according to claim 1, wherein a skin member having a groove formed by a preforming mold is used, and the skin member is arranged on a foaming mold to integrally foam the mold. A seat body characterized by the following.