JP3831224B2 - Seat cushion - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat cushion, and in particular, provides a seat cushion that is excellent in appearance quality and can be formed into a shape having an undercut.
[0002]
[Prior art]
BACKGROUND ART A vehicle seat cushion is a component that is mounted on a vehicle as a cushion that supports an occupant seated in a vehicle seat. Since this seat cushion is a part that directly touches the occupant, it is desired that the seat cushion has a smooth surface and little unevenness. In addition, since the seat cushion is also a part that decorates the interior of the vehicle, it is desired to manufacture a seat cushion that can be formed into an arbitrary design. This seat cushion is formed by a seat pad that is molded from a foaming material such as urethane having cushioning properties to form the outer shape of the seat cushion, and a skin material that encloses the seat pad and decorates the outer surface of the seat cushion. ing.
[0003]
The seat pad that forms the outer shape of the seat cushion is formed by using an upper mold and a lower mold of a foam mold that can be opened and closed vertically. Specifically, a design surface formed from the seating surface to the side surface of the seat pad is molded with a lower mold having a concave mold surface, and is covered with the lower mold surface so as to be substantially planar. The back surface of the seat pad is formed with an upper mold having
[0004]
According to the seat pad molded by this foam molding die, the small granular dent generated on the surface of the seat pad due to the bubbles generated during molding of the foam material is formed on the back surface of the seat pad molded by the upper mold. The seat pad molded by the lower mold is not affected by bubbles during molding and can smoothly form the design surface along the mold surface. Further, since the design surface of the seat pad is formed only by the lower mold, the step or the burr generated on the mating surface of the mold does not occur, and the design surface of the seat pad can be formed smoothly. Thus, since the design surface of the seat pad is formed smoothly, the seat cushion is excellent in appearance quality.
[0005]
[Problems to be solved by the invention]
However, in this seat cushion, since the seat surface and side surface of the seat pad are formed by the lower mold, if the mold structure is not changed, a shape having an extreme undercut may be formed due to a problem of demolding. Can not. In other words, it is possible to forcibly remove the product from the mold if it is a minute undercut, but it is not possible to form a seat cushion having a part that is extremely swept downward from the seating surface side was there. For this reason, there existed a problem that the freedom degree when designing the design surface of a seat cushion will be restrict | limited.
[0006]
On the other hand, when the mold structure is changed to form a shape having an undercut, a small granular dent is generated on the design surface of the seat pad due to bubbles generated from the foam material, or the design surface of the seat pad is formed by the mating surface of the mold However, there is a problem that a step or a burr is generated and the appearance quality is deteriorated.
[0007]
The present invention has been made to solve the above-described problems, and an object thereof is to provide a seat cushion that is excellent in appearance quality and can be formed into a shape having an undercut.
[0008]
[Means for Solving the Problems]
To achieve this object, a seat cushion according to claim 1 is formed with a seat surface on which an occupant can be seated, a side surface formed downward from the periphery of the seat surface, and a lower end of the side surface as a periphery. A seat pad formed of a foam material such as urethane, and a skin material that encloses the seat pad, and the side surface of the seed pad is formed along a substantially vertical direction at the time of molding. In the vicinity of the side surface of the back surface of the seat pad, at least one or more recesses are formed in a groove shape along the periphery of the back surface, and the recess is recessed away from the periphery of the back surface. The recessed portion and the side surface form a thin plate-like side wall projecting from the seating surface side toward the back surface side, and the seat pad is formed in a shape along the outer shape of the seat pad. Seat frame The seat frame is disposed adjacent to the recess of the seat pad and at a position spaced apart from the recess with respect to the side wall, whereby the recess is provided between the seat frame and the side surface of the seat pad. recessed in the side wall in which the skin material in a state of being tilted inclined to the concave side than during molding encapsulating the seat pad.
[0009]
According to the seat cushion of the first aspect, when the outer surface of the seat pad is pressed inward, the gap between the recesses provided in the seat pad is reduced. In conjunction with the reduction of the gap of the recess, the lower part of the side surface of the seat pad adjacent to the recess is tilted toward the recess, that is, the center of the back surface of the seat pad, compared to the molding. When the seat pad is encased in the skin material while the lower part of the side surface of the seat pad is tilted to the concave side, the lower part of the side surface of the seat pad is tilted by the skin material being restricted from moving outward. Kept in a state.
[0010]
According to a second aspect of the present invention, there is provided the seat cushion according to the first aspect, further comprising a fixing means for fixing the skin material to the back surface of the seat pad. The skin material is fixed to the back surface of the seat pad while being tilted toward the concave portion.
[0011]
A seat cushion according to a third aspect is the seat cushion according to the second aspect, wherein the fixing means fixes the skin material to the back surface of the seat pad with a gap left in the recess.
[0012]
[0013]
The seat cushion according to claim 4 is the seat cushion according to claim 2 or 3 , wherein the fixing means fixes the skin material to the back surface of the seat pad by connecting the skin material to the seat frame. Is.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing a seat cushion 1 in the first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the seat cushion 1 taken along the line II-II in FIG.
[0015]
The seat cushion 1 is a component that is mounted on a vehicle as a cushion that supports the lower body of an occupant seated on a rear seat of an automobile. As shown in FIG. 1, the seat cushion 1 has a substantially rectangular seat surface 1a, side surfaces 1b and 1c formed downward from the periphery of the seat surface 1a, and lower ends of the side surfaces 1b and 1c. And a back surface formed as a peripheral edge. A lower portion (lower side in FIG. 1) of the side surface 1b orthogonal to the longitudinal direction of the seating surface 1a is formed to be inclined inward.
[0016]
As shown in FIG. 2, the seat cushion 1 includes a seat pad 2 that forms the outer shape of the seat cushion 1, a seat frame 3 that forms the skeleton of the seat pad 2, and a skin material 4 that encloses the seat pad 2. And a fastener 5 for fixing the skin material 4 to the seat pad 2.
[0017]
The seat pad 2 is a member that forms the outer shape of the seat cushion 1. As shown in FIG. 2, the seat pad 2 includes a seat surface 2a (upper side in FIG. 2) on which an occupant can be seated, and side surfaces 2b and 2f (see FIG. 3 (FIG. 3) formed downward from the periphery of the seat surface 2a. a)) and a back surface 2c (lower side in FIG. 2) formed with the lower ends of the side surfaces 2b and 2f as a peripheral edge, and urethane formed by foaming urethane which is a porous (porous) elastic material It is formed by foam. A seat frame 3 formed of round steel or the like is disposed inside the seat pad 2 as a skeleton of the seat pad 2. Details of the seat pad 2 and the seat frame 3 will be described later with reference to FIG.
[0018]
The skin material 4 is a member that decorates the outer surface of the seat cushion 1. As shown in FIG. 2, the skin material 4 is formed of a sheet-like cloth that can enclose the seating surface 2 a and the side surfaces 2 b and 2 f of the seat pad 2, and the seating surface 2 a and the side surface 2 b of the seat pad 2. , 2f. The skin material 4 does not necessarily need to be bonded and fixed to the seating surface 2a and the side surfaces 2b and 2f of the seat pad 2, and may be simply encapsulated in the seat pad 2 without bonding the skin material 4. Further, wires formed of resin, metal, or the like are respectively disposed inside the seat pad 2 and the inner surface of the skin material 4, and the skin material 4 is fixed by so-called suspension in which the wires are held together by a C ring or the like. You may do it.
[0019]
The skin material 4 is formed so as to enclose the periphery of the back surface 2c (lower side in FIG. 2) of the seat pad 2, and the end 4a of the skin material 4 encapsulating the periphery of the back surface 2c. Are connected to the seat frame 3 by fasteners 5. The skin material 4 is not limited to cloth, and may be formed using vinyl leather or leather.
[0020]
The fastener 5 is a so-called C-ring that sandwiches and connects the skin material 4 and the seat frame 3. The fastener 5 is a steel wire formed in a C-shape, and connects the end portions 4 a of the skin material 4 to the seat frame 3 at a plurality of locations along the periphery of the back surface 2 c of the seat pad 2. Thus, the skin material 4 can be reliably fixed to the back surface 2c of the seat pad 2 by connecting the skin material 4 to the seat frame 3 having a stronger strength than the foam material. In addition, as the fastener 5 which fixes the skin material 4 to the seat pad 2, you may use a well-known hook ring, an adhesive agent, other heat-meltable films, etc. Alternatively, a hook in which resin, metal, or the like is formed in a J-shaped cross section may be used as the fastener 5, and the skin material 4 may be fixed by hanging the hook on the seat frame 3 or the like.
[0021]
Next, the seat pad 2 and the seat frame 3 will be described with reference to FIG. 3A is a view showing the back surface 2c of the seat pad 2, and FIG. 3B is a cross-sectional view taken along the line IIIb-IIIb in FIG. 3A.
[0022]
The back surface 2c of the seat pad 2 is formed in a substantially rectangular shape as shown in FIG. 3A, and is approximately 20 mm along the periphery of the back surface 2c in the vicinity of the side surface 2b orthogonal to the longitudinal direction of the back surface 2c. A recess 2d is formed in a groove shape having a width. The concave portion 2d is formed to be spaced apart from the periphery of the back surface 2c by approximately 20 mm. The concave portion 2d and the side surface 2b project from the seating surface 2a side to the back surface 2c side as shown in FIG. 3B. A thin plate-like side wall 2e is formed. Since the side wall 2e is formed in a thin plate shape, the side wall 2e is configured to be tiltable toward the concave portion 2d.
[0023]
A seat frame 3 formed of round steel having a diameter of about 5 mm is disposed inside the seat pad 2. The seat frame 3 is a member constituting the skeleton of the seat pad 2, and is formed in a shape along the outer shape of the seat pad 2 as shown in FIG. Since the seat frame 3 is disposed along the outer shape of the seat pad 2, the outer shape of the seat pad 2 is stabilized by appropriately reinforcing the seat pad 2 formed of a flexible material. Can do. The seat frame 3 is not necessarily disposed inside the seat pad 2, and the seat pad 2 without the seat frame 3 may be formed and used.
[0024]
Further, as shown in FIG. 3 (b), the seat frame 3 is disposed adjacent to the recess 2d of the seat pad 2 and spaced from the side wall 2e by the recess 2d. Therefore, the side wall 2e is configured to be tilted toward the recess 2d without being reinforced by the seat frame 3.
[0025]
Here, the seat pad 2 is formed by using an upper mold and a lower mold of a foam mold that can be opened and closed vertically. That is, the part from the seat surface 2a of the seat pad 2 to the side surfaces 2b and 2f is formed by the lower mold having the concave mold surface. In addition, the back surface 2c of the seat pad 2 is formed by an upper die that is provided facing the lower die surface and has a substantially planar die surface. A recess 2d that is recessed in the back surface 2c of the seat pad 2 is formed by an upper mold.
[0026]
In the seat pad 2 formed by the upper mold and the lower mold, steps and burrs generated by the mating surfaces of the mold are formed at the edges of the side surfaces 2b and 2f, so that the side surfaces 2b and 2f of the seat pad 2 are smoothed. Can be formed. Further, since the lower mold surface can be formed in a deeper concave shape than in the case where a mold mating surface is provided in the middle of the side surfaces 2b and 2f of the seat pad 2, a urethane stock solution before mold clamping such as during injection or during foaming. It is possible to prevent liquid leakage. Furthermore, the small granular dent produced by the bubbles at the time of foam molding is formed only on the back surface 2c of the seat pad 2 molded by the upper mold, and the seating surface 2a and the side surfaces 2b, 2f of the seat pad 2 molded by the lower mold. Can be formed smoothly along the mold surface. The upper mold surface may be formed in a concave shape, and the end portions (upper side in FIG. 3B) of the side surfaces 2b and 2f of the seat pad 2 may be formed with the upper mold.
[0027]
Next, a method for forming the seat cushion 1 will be described with reference to FIGS. 2 and 3. When forming the seat cushion 1, first, the seat pad 2 into which the seat frame 3 is inserted is formed (see FIG. 3). As shown in FIG. 3 (b), the side pad 2b of the seat pad 2 at the time of molding is formed along a substantially vertical direction (vertical direction in FIG. 3 (b)). ) In the shape without undercut that can be punched downward.
[0028]
Next, an adhesive is applied to the seating surface 2a and the side surfaces 2b, 2f of the molded seat pad 2, and then the seat pad 2 is encapsulated by the skin material 4 (see FIG. 2), and the adhesive is applied. A part of the skin material 4 corresponding to the part is pressed from the outside, and the seating surface 2a and side surfaces 2b, 2f of the seat pad 2 and the skin material 4 are bonded and fixed. The sheet-like skin material 4 is fixed in close contact with the seating surface 2 a and the side surfaces 2 b and 2 f of the seat pad 2, and the outer shape of the seat cushion 1 becomes a shape along the outer shape of the seat pad 2.
[0029]
After the seating surface 2a and the side surfaces 2b and 2f of the seat pad 2 are bonded to the skin material 4, a tensile force is applied to the end portion 4a of the skin material 4 toward the center of the back surface 2c of the seat pad 2. When a tensile force is applied to the end 4a of the skin material 4, as shown in FIG. 2, the side surface 2b of the seat pad 2 is pressed toward the recess 2d, and the side wall 2e is tilted toward the recess 2d. When the side wall 2e is tilted and the gap of the recess 2d is closed (as shown in FIG. 2), the side wall 2e is supported by the wall on the side of the recess 2d where the seat frame 3 is disposed, and the tilt of the side wall 2e stops. To do. By tilting the side wall 2e toward the recess 2d side, the lower part of the side surface 2b of the seat pad 2 is formed in a shape having an undercut that cannot be removed from the seating surface 2a side (upper side in FIG. 2) on the mold structure. The lower part of the side surface 1b of the seat cushion 1 can be formed in a shape inclined inward.
[0030]
The lower portion of the side surface 1b of the seat cushion 1 can be formed in a desired shape by adjusting the shape of the recess 2d of the seat pad 2. That is, by adjusting the depth of the recess 2d of the seat pad 2, the position where the side surface 1b of the seat cushion 1 starts to incline can be adjusted. Further, by adjusting the width of the recess 2d of the seat pad 2, the amount by which the side surface 1b of the seat cushion 1 is inclined inward can be adjusted.
[0031]
Next, the end 4 a of the skin material 4 is connected and fixed to the seat frame 3 by the fastener 5 with the side wall 2 e tilted. When the end portion 4a of the skin material 4 is connected and fixed to the seat frame 3, the restoration of the side wall 2e is restricted by the skin material 4 even when trying to restore it to the original position, and is held in an inclined state.
[0032]
Thus, the recess 2d is provided in the back surface 2c of the seat pad 2, and the seat pad 2 is encapsulated in the skin material 4 with the side wall 2e of the seat pad 2 tilted toward the recess 2d. Therefore, it is possible to form the seat cushion 1 having a shape in which the side wall 2e of the seat pad 2 is tilted toward the concave portion 2d from the time of forming the seat pad 2. Therefore, even in the conventional mold structure in which the seat surface 2a and the side surfaces 2b, 2f of the seat pad 2 are molded with the lower mold, the lower part of the side surface 2b of the seat pad 2 can be tilted to the concave portion 2d side after molding, The seat cushion 1 having a shape having an extreme undercut can be formed. As a result, the degree of freedom in designing the seat cushion 1 can be increased.
[0033]
In addition, it is possible to form the seat cushion 1 having an extreme undercut by using a foam mold that combines an upper mold and a lower mold following the conventional mold structure. By doing so, the step and the dent caused by the bubbles and the mating surface of the mold are not formed on the seating surface 2a and the side surface 2b of the seat pad 2. For this reason, the seat cushion 1 excellent in appearance quality can be manufactured.
[0034]
Next, the second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view of the seat cushion 10 in the second embodiment. The seat cushion 10 of the second embodiment is provided with a gap A in the recess 12d of the seat pad 12 with respect to the seat cushion 1 of the first embodiment described above. In the following, the same parts as those in the first embodiment are denoted by the same reference numerals, the description thereof is omitted, and only different parts are described.
[0035]
As shown in FIG. 4, the seat cushion 10 includes a seat pad 12 formed to have substantially the same outer shape as the seat pad 2 of the first embodiment. The seat pad 12 is provided with a recess 12d wider on the back surface 12c than the recess 2d of the first embodiment. In the seat cushion 10, the skin material 4 is fixed by the fastener 5 so that the gap A is left in the recess 12 d.
[0036]
The method of fixing the skin material 4 is to attach the skin material 4 to the seating surface 12a and the side surface 12b of the seat pad 12, and then tilt the side wall 12e of the seat pad 12 and attach the end 4a of the skin material 4 to the seat pad. 12 moves to the center side of the back surface 12c. The movement of the end 4a of the skin material 4 stops when the side wall 12e is tilted by a predetermined amount toward the recess 12d. Thereafter, the end 4 a of the skin material 4 is fixed to the seat frame 3 by the fastener 5. As a result, the fastener 5 can fix the skin material 4 to the back surface 12c of the seat pad 12 with the gap A remaining in the recess 12d.
[0037]
Thus, the seat cushion 10 with the gap A remaining in the recess 12d is configured such that the side wall 12e of the seat pad 12 can be further tilted toward the center of the back surface 12c of the seat pad 12. That is, the lower portion of the side surface 10b of the seat cushion 10 can be further tilted toward the concave portion in response to the pressing on the side surface 10b of the seat cushion 10.
[0038]
Here, when the seat cushion 10 is mounted on the vehicle as a rear seat, the seat cushion 10 is disposed adjacent to a wheel house 20 (two-dot chain line in FIG. 4) formed around the wheels of the automobile. Since the seat cushion 10 can tilt the lower portion of the side surface 10b toward the concave portion, the seat cushion 10 can be assembled while tilting the lower portion of the side surface 10b against the wheel house 20. Therefore, even if the relative position between the seat cushion 10 and the wheel house 20 varies due to manufacturing variation or the like, the variation is absorbed into the gap A of the recess 12d, and the seat cushion 10 and the wheel house 20 are assembled without gaps. be able to.
[0039]
The present invention has been described above based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications and changes can be easily made without departing from the spirit of the present invention. Can be inferred.
[0040]
For example, in each of the above embodiments, the present invention has been described using the seat cushions 1 and 10 that are cushions for supporting the lower body of the occupant. Instead, the present invention is applied to a seat back that is a cushion for supporting the back of the occupant. The invention may be applied. Note that the seating surface on which the occupant can sit is also intended to include a surface that supports the back of the occupant.
[0041]
In each of the above embodiments, the rear seat is used as a part where the seat cushions 1 and 10 (or the above-described seat back) are used. However, the seat cushions 1 and 10 (or the above-described seat back) may be used for a front seat or a second seat. It may be used for a separate seat for a person.
[0042]
In the first embodiment, the recess 2d is provided in the vicinity of the side surface 2b of the seat pad 2. However, the recess may be provided along the entire periphery of the back surface 2c of the seat pad 2. Moreover, you may make it concave only in the four corners and long side in the back surface 2c of the seat pad 2. FIG. By adjusting the width, depth, and position of the recess, the seat pad 2 formed with the conventional mold structure can be applied to the seat cushion 1 of various designs.
[0043]
In the first embodiment, the recess 2d provided in the vicinity of the side surface 2b of the seat pad 2 is continuously formed in a single groove shape. However, the recess is formed intermittently. Alternatively, a plurality of recesses may be formed in parallel from the peripheral side of the back surface of the seat pad toward the center side of the back surface.
[0044]
Further, in the first embodiment, the inclined state of the recess 2d is maintained by fixing the skin material 4 to the back surface 2c of the seat pad 2, but the recess 2d is contracted by applying an adhesive into the recess. The recessed portion 2d may be held in a tilted state.
[0045]
【The invention's effect】
According to the seat cushion of the first aspect, the recess is formed in the back surface of the seat pad, and the seat pad is encapsulated in the skin material in a state where the lower part of the side surface of the seat pad is tilted toward the recess side. Therefore, it is possible to form a seat cushion having a shape in which the lower portion of the side surface of the seat pad is tilted toward the concave portion than when the seat pad is formed. Therefore, even in the conventional mold structure in which the seat pad and the side surface of the seat pad are molded with the lower mold, the lower part of the side surface of the seat pad can be tilted to the concave side after molding, and the seat cushion has an undercut shape. Can be formed. For this reason, there exists an effect that the freedom degree of the design of a seat cushion can be increased. In addition, since a seat cushion having a shape with an undercut can be formed following the conventional mold structure, steps and dents due to air bubbles during molding and a mating surface of the mold are formed on the seating surface and side surface of the seat pad. Can be prevented. Therefore, there is an effect that a seat cushion having excellent appearance quality can be manufactured.
In addition, since the seat pad includes a seat frame formed in a shape that conforms to the outer shape of the seat pad, a flexible portion formed of urethane or the like can be supported by the seat frame, and the outer shape of the seat pad can be changed. There is an effect that it can be stabilized. Further, since the recess is provided between the seat frame and the side surface of the seat pad, the lower part of the side surface of the seat pad can be formed so as to be tilted toward the recess without being reinforced by the seat frame. There is an effect.
[0046]
According to the seat cushion of the second aspect, in addition to the effect produced by the seat cushion of the first aspect, the fixing means applies the skin material to the back surface of the seat pad in a state where the lower part of the side surface of the seat pad is tilted toward the concave side. It is to be fixed to. For this reason, it can be controlled by the skin material that the lower part of the side surface of the seat pad tilted to the recess side is restored to the position before tilting. Therefore, it is not necessary to provide a means for holding the state where the lower part of the side surface of the seat pad is tilted separately from the fixing means described above, so that the seat cushion having a shape having an undercut can be provided without adding a manufacturing process. There is an effect that it can be manufactured.
[0047]
According to the seat cushion of the third aspect, in addition to the effect produced by the seat cushion of the second aspect, the fixing means fixes the skin material to the back surface of the seat pad with a gap left in the recess. Further, the lower portion of the side surface of the seat cushion can be formed so as to be further tiltable toward the concave portion by the remaining gap of the concave portion. For this reason, the seat cushion can be assembled to the vehicle while the lower part of the tiltable side surface is pressed against another member adjacent to the seat cushion and the lower part of the side surface of the seat cushion is tilted toward the recess. Therefore, even when the relative position between the lower portion of the side surface of the seat cushion and the separate member varies due to manufacturing variations, etc., the variation can be absorbed in the gaps of the recesses, and the seat cushion and the separate members can be assembled without any gaps. There is an effect that can be done.
[0048]
[0049]
According to the seat cushion of the fourth aspect , in addition to the effect of the seat cushion according to the second or third aspect , the fixing means fixes the skin material to the back surface of the seat pad by connecting the skin material to the seat frame. To do. Here, when the skin material is connected to the flexible portion formed of the foam material in the seat pad, the seat pad in the vicinity of the connecting portion is easily damaged. By connecting the fixing means to the seat frame formed of metal or the like, there is an effect that the damage to the seat pad can be suppressed and the skin material can be reliably fixed to the back surface of the seat pad.
[Brief description of the drawings]
FIG. 1 is a perspective view of a seat cushion according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
3A is a view showing the back surface of the seat pad, and FIG. 3B is a cross-sectional view taken along line IIIb-IIIb in FIG. 3A.
FIG. 4 is a sectional view of a seat cushion according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Seat cushion 2 Seat pad 2a Seat surface 2b, 2f Side surface 2c Back surface 2d Concave
2e Side wall 3 Seat frame 4 Skin material 5 Fastener (fixing means)

Claims (4)

It has a seat surface on which an occupant can be seated, a side surface formed downward from the periphery of the seat surface, and a back surface formed with the lower end of the side surface as the periphery, and is formed of a foam material such as urethane. In a seat cushion comprising a seat pad and a skin material encapsulating the seat pad,
The side surface of the seed pad is formed along a substantially vertical direction during molding,
In the vicinity of the side surface of the back surface of the seat pad, at least one or more recesses formed in a groove shape along the periphery of the back surface are formed,
The recess is recessed away from the periphery of the back surface, and the recess and the side surface form a thin plate-like side wall projecting from the seat surface side toward the back surface side, and the sheet. The pad includes a seat frame formed in a shape along the outer shape of the seat pad,
The seat frame is disposed adjacent to the recess of the seat pad and at a position separating the recess with respect to the side wall, whereby the recess is recessed between the seat frame and the side surface of the seat pad. set, and the seat cushion, characterized in that said side wall is what the skin material in a state of being tilted inclined to the concave side than during molding encapsulating the seat pad. A fixing means for fixing the skin material to the back surface of the seat pad;
2. The seat cushion according to claim 1, wherein the fixing means fixes the skin material to the back surface of the seat pad in a state where the lower part of the side surface of the seat pad is tilted toward the recess.   3. The seat cushion according to claim 2, wherein the fixing means fixes the skin material to the back surface of the seat pad with a gap left in the recess. The seat cushion according to claim 2 or 3, wherein the fixing means fixes the skin material to the back surface of the seat pad by connecting the skin material to the seat frame.

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