JP2019088385A - Vehicle seat pad - Google Patents

Abstract

To provide a vehicle seat pad with hard and soft double-layer structure in which the layers each hardly peel off.SOLUTION: A cushion pad 10 comprises a front layer pad 11 at a side of a seating surface, and a back layer pad 12 integrated in a laminated form at an opposite side to the seating surface, of the front layer pad 11, and harder and lower in density than the front layer pad 11. An external wall surface part 12d1 extending in a direction nearly parallel to a direction in which the seating pressure of a seated occupant in the back layer pad 12 is applied, the external wall being a surface abutted on the front layer pad 11, is provided with a plurality of fitting grooves 12d11 whose cross section has a nearly U shape opening to the side of the front layer pad 11, and which extend in a direction nearly parallel to a direction in which the seat pressure of the seated occupant is applied. The front layer pad 11 and the back layer pad 12 are integrated while a part of the front layer pad 11 is intruded into the fitting grooves 12d11.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle seat pad.

  A vehicle seat having a two-layered seat pad as a cushion material has been known. Patent Document 1 below shows a vehicle seat pad in which a back layer pad, which is a foam of an AS resin (copolymer of acrylonitrile and styrene), is integrally formed on the opposite side of the seating surface of the surface pad, which is a foam of polyurethane resin. It is disclosed. The back layer pad is hard and has a smaller density than the surface layer pad, and therefore, the hardness can be partially different while achieving weight reduction of the vehicle seat pad. Further, Patent Document 2 discloses a vehicle seat having a pad body in which a polypropylene resin foam having a through hole provided therein is embedded in a polyurethane resin foam. Since the foam of polypropylene resin is harder and smaller in density than the foam of polyurethane resin, hardness can be partially made different while reducing the weight of the vehicle seat pad, and since the through holes are provided, polyurethane Hard to separate from resin foam.

JP, 2010-125138, A JP 2012-206403 A

  In the vehicle seat pad described in Patent Document 1, there are cases where it is desirable to replace the back layer pad with a polypropylene resin foam in order to further reduce the weight. In such a case, since the foam of polypropylene resin is inferior in adhesion to the foam of polyurethane resin as compared with the foam of AS resin, the surface of the foam of polypropylene resin is subjected to embossing. In such emboss processing, many man-hours are required to find processing conditions that make the adhesion between the polyurethane resin and the foam and the mold releasability from the mold when forming the polypropylene resin foam be compatible. There was a problem.

  The present invention has been made in view of these points. It is an object of the present invention to provide a vehicle seat pad having a hard and soft two-layer structure, in which each layer is less likely to be peeled off.

  According to a first aspect of the present invention, there is provided a vehicle seat pad, wherein the surface layer pad on the seating surface side and the surface layer pad integrated with the surface layer pad on the opposite side of the seating surface are harder and lower in density. A back layer pad, wherein at least the surface of the back layer pad extends in a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied and abuts against the surface layer pad in cross section A plurality of grooves extending in a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied are provided in a substantially U shape opened toward the side of the pad, and a part of the surface layer pad intrudes into the grooves It is characterized in that the surface layer pad and the back layer pad are integrated in a state of being separated.

  According to the first aspect of the present invention, a plurality of the back layer pads are provided at the interface substantially parallel to the direction in which the seating pressure of the seated occupant to which the peeling force is easily applied is applied. The surface layer pad and the back layer pad are integrated in a state in which a part of the surface layer pad is formed therein. As a result, at the interface extending in the direction in which the seating pressure of the seated occupant is applied, the contact area of the surface layer pad and the back layer pad is increased, and both are less likely to be peeled off.

  According to a second aspect of the present invention, in the first aspect, the cross section of the groove is formed such that the groove width is expanded at the groove bottom side opposite to the opening from the opening. It is characterized by

  According to the second aspect of the invention, the surface layer pad and the back layer pad are less likely to be peeled off because a portion of the surface layer pad that has entered the groove is less likely to come off the groove.

  According to a third aspect of the present invention, in the first aspect or the second aspect, the back layer pad extends in a direction substantially perpendicular to a direction in which a seating pressure of a seated occupant is applied and in contact with the surface layer pad A plurality of transverse grooves extending in a direction substantially perpendicular to the direction in which the seating pressure of the seated occupant is applied are provided in a substantially U shape whose transverse cross section opens toward the surface pad side, and the transverse grooves It is characterized in that the surface layer pad and the back layer pad are integrated in a state where a part of the surface layer pad intrudes.

  According to the third invention, a plurality of lateral grooves are formed in the back layer pad also at the interface extending in a direction substantially perpendicular to the direction in which the seating pressure of the seated occupant is applied among the interfaces of the surface layer pad and the back layer pad. The surface layer pad and the back layer pad are integrated in a state where a part of the surface layer pad intrudes. As a result, the contact area between the surface layer pad and the back layer pad is increased even at the interface extending in a direction substantially perpendicular to the direction in which the seating pressure of the seated occupant is applied, and both are less likely to peel off.

  According to a fourth invention of the present invention, in any one of the first invention to the third invention, a cylindrical penetration extending in a direction substantially parallel to a direction in which a seating pressure of a seated occupant is applied to the back layer pad. A hole or a cylindrical bottomed hole is provided, and the surface layer pad and the back layer pad are integrated in a state where a part of the surface layer pad intrudes into the through hole or the bottomed hole. It is characterized by

  According to the fourth invention, since the surface layer pad and the back layer pad are also in contact with the through hole of the back layer pad or the outer peripheral wall surface of the bottomed hole, the contact area is increased and both are less likely to be peeled off.

It is a perspective view of a car seat to which a cushion pad concerning one embodiment of the present invention was applied. It is a disassembled perspective view of a cushion pad. It is a top view of the back layer pad of a cushion pad. It is sectional drawing cut and shown by the IV-IV line of FIG. It is sectional drawing cut and shown by the VV line | wire of FIG. It is sectional drawing cut and shown by the VI-VI line of FIG. It is a partial perspective view of the back layer pad of a cushion pad. It is a figure which expands and shows the VIII part of FIG. It is a figure which expands and shows the IX part of FIG.

  1 to 9 show a car seat 1 to which a cushion pad according to an embodiment of the present invention is applied. In each of the drawings, the arrows indicate the directions of the automobile and the automobile seat 1 when the automobile seat 1 is attached to the floor F of the automobile. In the following description, the description of the direction will be made based on this direction.

  As shown in FIG. 1, the automotive seat 1 is a bench seat for three, and has a length in the left-right direction substantially the same as the width of the cabin. The automotive seat 1 includes a seat cushion 2 that supports the buttocks and thighs of a seated occupant, and a seat back 3 that supports the back of the seated occupant. The seat cushion 2 and the seat back 3 are in contact with the rear end portion of the seat cushion 2 at the lower end portion of the seat back 3 and the floor F in a state where the seat back 3 stands upright on the seat cushion 2 Is mounted to the vehicle seat 1 to constitute a car seat. The seat back 3 is a usual one, and has a structure in which a back pad which is a foam of polyurethane resin is covered with a back cover which is a skin material. The upper surface of the seat cushion 2 and the front surface of the seat back 3 are seating surfaces with which the body of the seated occupant abuts.

  As shown in FIG. 1, the seat cushion 2 has a pair of left and right seat portions 2S and a central seat portion 2C disposed between the left and right seat portions 2S. The seat cushion 2 also includes a cushion pad 10 that is a cushioning material, and a cushion cover 20 that is a skin material that covers the surface on the seating occupant side of the cushion pad 10. Here, the cushion pad 10 corresponds to a "vehicle seat pad" in the claims.

As shown in FIGS. 2 to 6, the cushion pad 10 is provided with a surface layer pad 11 disposed on the front side which is the seated occupant side, and a back layer pad 12 disposed on the back side opposite the seated occupant of the surface layer pad 11. And. The surface layer pad 11 is formed of urethane foam obtained by foam molding of a polyurethane resin, and its density is set to, for example, about 0.045 ± 0.005 g / cm ³ . The surface layer pad 11 has a surface portion 11a having a shape and an area occupying the entire seating surface side of the cushion pad 10, and a back surface portion 11b forming a surface opposite to the seating surface.

As shown in FIGS. 2-9, the back layer pad 12 is a bead foam molded article of olefin resin, such as polypropylene and polyethylene, The density is set to about 0.03 g / cm < ³ >. The back layer pad 12 is formed as a hard one having a density smaller than that of the surface layer pad 11 and a high elastic modulus.

  The back layer pad 12 has a front side 12a that abuts a portion of the back surface 11b of the surface layer pad 11, and a back side 12b that forms a surface opposite to the seating surface. The back layer pad 12 is provided with a through hole 12 c penetrating in the vertical direction at a central portion in the left, right, front and back directions in top view. The length of the through hole 12c in the front-rear direction is longer than the portion corresponding to the central seat portion 2C in the portion corresponding to the left and right seat portions 2S. That is, the back layer pad 12 is formed in a substantially frame shape along the outer peripheral edge portion of the cushion pad 10 in top view. Thereby, when the surface layer pad 11 is integrally foamed on the back layer pad 12, a part of the surface layer pad 11 intrudes into the through holes 12 c of the back layer pad 12 and is molded and cured. A portion 11 b forms the back surface of the cushion pad 10.

  As shown in FIGS. 2 to 7, the back layer pad 12 includes a pair of left and right side portions 12d extending in the front-rear direction, a front portion 12e connecting between front end portions of the left and right side portions 12d, and left and right side portions 12d. And a rear portion 12f connecting between the rear end portions of The side portion 12d has an outer wall surface portion 12d1 shaped to conform to the outer shape of the left and right side portions of the cushion pad 10 in top view and an inner wall surface portion 12d2 corresponding to the left and right peripheral edge portions of the through hole 12c in top view. The inner wall surface portion 12d2 extends in the back and forth direction parallel to the outer wall surface portion 12d1 on the rear side, bends inward in the sheet width direction as it goes to the front on the front side, and bends and extends outward in the sheet width direction as it goes to the front It is formed as. That is, the side portion 12d is formed with a side protruding portion 12d3 which protrudes inward in the sheet width direction at a position where the width in the left-right direction is large at a portion slightly behind the front end in top view. This is because in the left and right seat portions 2S, the buttocks support portion 11c to which a large seating pressure is applied elastically supports the seated occupant with only the surface layer pad 11, and the thigh support portion 11d to which a large seating pressure is not applied The layer pad 12 is added and supported to try to reduce the weight of the cushion pad 10. Here, the outer wall surface portion 12d1 and the inner wall surface portion 12d2 respectively correspond to "surfaces extending in a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied" and in contact with the surface layer pad. The outer wall surface portion 12d1 and the inner wall surface portion 12d2 are formed to extend in the vertical direction. Here, the vertical direction corresponds to “a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied” in the claims.

  As shown in FIGS. 3, 7 and 8, in the outer wall surface portion 12d1 of the side portion 12d, a fitting groove 12d11 having a cross section having an opening at the outer side in the sheet width direction and extending in the vertical direction And five are provided at substantially equal pitches along the outer wall surface portion 12d1. More specifically, as shown in FIG. 8, in the cross section of the fitting groove 12d11, the left end portion (the sheet width direction inner end portion) of the straight portion 12d111 extending in the left and right direction in parallel is parallel to the arc portion 12d112. It has a connected shape, and the interval in the front-rear direction of the linear portion 12d111 is formed shorter than the diameter of the arc portion 12d112. When the surface layer pad 11 is integrally molded to the back layer pad 12, a portion of the surface layer pad 11 intrudes into the fitting groove 12d11 and hardens, and the surface layer pad 11 of the portion corresponding to the arc portion 12d112 is straight It becomes difficult to come off from back layer pad 12 of a portion corresponding to portion 12d111. Thus, the surface layer pad 11 can be firmly connected to the back layer pad 12 in the outer wall surface portion 12d1. An inner wall portion 12d2 of the side portion 12d is a substantially Ω (omega) shape having a cross-section having an opening on the inner side in the sheet width direction, at a portion extending in the front-rear direction parallel to the rear outer wall portion 12d1 Two grooves 12d21 are provided. The fitting groove 12d21 is a groove having substantially the same cross section as the fitting groove 12d11. The surface layer pad 11 can be firmly connected to the back layer pad 12 in the inner wall surface portion 12d2 by the same mechanism as the fitting groove 12d11. Furthermore, in the side portion 12d, cylindrical through holes 12d4 penetrating in the vertical direction at substantially the center in the left-right direction are arranged in a straight line at an equal pitch in the front-rear direction. The diameter of the through hole 12d4 is approximately the same as the diameter of the arc portion 12d112. Thereby, when the surface layer pad 11 is integrally molded to the back layer pad 12, a part of the surface layer pad 11 intrudes into the through hole 12 d 4 and hardens, and the back surface portion 11 b of the surface layer pad 11 and the back layer pad 12 It is possible to increase the connection strength to the forces in the out-of-plane direction and the in-plane direction of the front side 12a of the Here, the fitting groove 12 d 11 and the fitting groove 12 d 21 correspond to the “groove” in the claims. Further, the straight portion 12d111 corresponds to the "opening" in the claims, and the arc portion 12d112 corresponds to the "spreading portion" in the claims.

  As shown in FIGS. 2 to 7, the front portion 12 e has a front wall portion 12 e 1 extending substantially linearly in the left and right direction along the outer shape of the front portion of the cushion pad 10 in top view, and the through hole 12 c in top view And a rear wall surface portion 12e2 corresponding to the front peripheral edge portion of the The rear wall surface portion 12e2 extends in the left-right direction substantially in parallel with the front wall surface portion 12e1 at a portion corresponding to the left and right seat portions 2S, and protrudes backward in an equal leg trapezoidal shape in top view at a portion corresponding to the central seat portion 2C. It is formed to extend. That is, in the front portion 12e, the front protrusion 12e3 is formed having a short length in the front-rear direction on both left and right end sides in a top view, and a length in the front-rear direction increased in the central portion to project backward. . This is because in the central seat portion 2C, the buttocks support portion 11e to which a large seating pressure is applied elastically supports the seated occupant with only the surface layer pad 11, and the thigh support portion 11f to which a large seating pressure is not applied The layer pad 12 is added and supported to try to reduce the weight of the cushion pad 10. The front side 12a of the front portion 12e is formed to extend in the front-rear direction. Here, the front-rear direction corresponds to the “direction substantially perpendicular to the direction in which the seating pressure of the seated occupant is applied” in the claims.

  As shown in FIG. 3, FIG. 7 and FIG. 9, the front side 12a of the front part 12e has a fitting groove 12e4 having a cross section extending substantially in the upper Ω direction with an opening at the upper side. Two are provided at a portion corresponding to the portion 2S, and three at a portion corresponding to the central seat portion 2C. The fitting groove 12e4 is a groove having substantially the same cross section as the fitting groove 12d11. The surface layer pad 11 can be firmly connected to the back layer pad 12 at the front side 12a of the front portion 12e by the same mechanism as the fitting groove 12d11. When the back layer pad 12 is defoamed by bead foam molding, the mold release direction is vertical, so that the mold portion corresponding to the arc portion 12e42 of the fitting groove 12e4 is the back layer of the portion corresponding to the straight portion 12e41 In some cases, removal from the pad 12 may be difficult and removal may be difficult. In such a case, the diameter of the arc portion 12e42 may be reduced, or the cross-sectional shape of the fitting groove 12e4 may be substantially U-shaped. In this case, the strength in the peeling direction of the back surface portion 11b of the surface layer pad 11 relative to the front side 12a of the front portion 12e in the vertical direction (out-of-plane direction) is slightly reduced. It is maintained equivalent to the groove 12e4. Here, the fitting groove 12e4 corresponds to the "lateral groove" in the claims.

  As shown in FIGS. 2 to 7, the rear portion 12f has a rear wall surface portion 12f1 extending in the left and right direction along the outer shape of the rear portion of the cushion pad 10 in top view, and a peripheral portion on the rear side of the through hole 12c in top view And a front wall portion 12f2 corresponding to The rear wall surface portion 12f1 and the front wall surface portion 12f2 extend in parallel in the left-right direction at a portion corresponding to the left and right seat portions 2S and a portion corresponding to the center seat portion 2C, and a portion corresponding to the left and right seat portions 2S and the center seat portion 2C Between the portions corresponding to the front and rear parallel curved lines. That is, the rear portion 12f is formed with a curved portion 12f3 which is curved forward and protrudes between a portion corresponding to the left and right seat portions 2S and a portion corresponding to the central seat portion 2C in top view. The curved portion 12f3 is for forming a recess for disposing a buckle of a seat belt (not shown). The rear wall surface portion 12f1 and the front wall surface portion 12f2 are formed to extend in the vertical direction. Here, the rear wall surface portion 12f1 and the front wall surface portion 12f2 respectively correspond to "surface extending in a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied and in contact with the surface layer pad" in the claims. .

  As shown in FIGS. 3 and 7, in the rear wall portion 12f1 of the rear portion 12f, a fitting groove 12f11 having a cross section extending substantially vertically and having an opening at the rear is formed in the left and right seat portions 2S. There are three provided at corresponding sites. The fitting groove 12f11 is a groove having substantially the same cross section as the fitting groove 12d11. The surface layer pad 11 can be firmly connected to the back layer pad 12 at the rear wall surface portion 12f1 of the rear portion 12f by the same mechanism as the fitting groove 12d11. Further, in the front wall surface portion 12f2 of the rear portion 12f, two fitting grooves 12f21 having a substantially omega (omega) shape whose cross section has an opening in the front and extending in the vertical direction are provided at a portion corresponding to the left and right seat portions 2S. ing. The fitting groove 12f21 is a groove having substantially the same cross section as the fitting groove 12d11. The surface layer pad 11 can be firmly connected to the back layer pad 12 at the front wall surface portion 12f2 of the rear portion 12f by the same mechanism as the fitting groove 12d11. Here, the fitting groove 12 f 11 and the fitting groove 12 f 21 correspond to the “groove” in the claims.

  As shown in FIGS. 2 to 6, a frame 13 made of iron wire is attached to the inside of the front, rear, left, and right outer peripheral edge portions of the back layer pad 12. The mounting method is to insert a corresponding portion of the frame 13 into the groove 12g having a substantially U-shaped cross section provided downward at a plurality of predetermined positions on the back side 12b of the back layer pad 12 It is done by. In this state, by integrally foaming the surface layer pad 11, the frame 13 is integrated with the surface layer pad 11 together with the back layer pad 12, and the cushion pad 10 is formed. The frame 13 has a frame portion 13a having an outer shape in a top view, a pair of left and right bridging portions 13b, and a plurality of locking portions 13c. The frame portion 13a is formed in a substantially rectangular shape along the shape of the back layer pad 12 in top view by assembling and fixing a plurality of wire members in an endless manner. A pair of left and right bridging portions 13b are bridged and fixed between the front portion extending in the left-right direction of the frame portion 13a and the rear portion extending in the left-right direction. I have secured. The locking portion 13 c is a portion for fixing the frame 13 to the floor F, and is provided two at the front and two at the rear of the frame portion 13 a.

  The above-described embodiment configured as described above has the following effects. Among the interfaces between the surface layer pad 11 and the back layer pad 12, particularly the peeling force is easily applied to the outer wall surface portion 12d1 which is an interface extending in the vertical direction which is substantially parallel to the direction in which the seating pressure of the seated occupant is applied. , An inner wall surface portion 12d2, a rear wall surface portion 12f1, a front wall surface portion 12f2, and the like. A plurality of fitting grooves 12d11, fitting grooves 12d21, fitting grooves 12f11, and fitting grooves 12f21 are provided in the wall surface portion, respectively. Each fitting groove is formed extending in the vertical direction, and the surface layer pad 11 and the back layer pad 12 are integrated in a state where a part of the surface layer pad 11 intrudes therein. As a result, the contact area between the surface layer pad 11 and the back layer pad 12 increases at the interface extending in the direction in which the seating pressure of the seated occupant is applied, and both are less likely to be peeled off.

  The cross section of the fitting groove 12d11, the fitting groove 12d21, the fitting groove 12f11, and the fitting groove 12f21 is substantially Ω (omega) and the groove width is opposite to the opening from the linear portion 12d111 which is the opening. It is expanded and formed in circular arc part 12d112 which is an expanded part by the side of a groove bottom. As a result, the fitting groove 12d11, the fitting groove 12d21, the fitting groove 12f11, and a part of the surface layer pad 11 that has entered into the fitting groove 12f21 are less likely to come out of the groove, so the surface layer pad 11 and the back layer pad 12 Is less likely to come off.

  Furthermore, among the interfaces of the surface layer pad 11 and the back layer pad 12, the cross section also in the front side portion 12a of the front portion 12e which is an interface extending in the front-rear direction which is a direction substantially perpendicular to the direction of the seating pressure of the seated occupant. An approximately Ω (omega) shape having an opening at the top is provided with a fitting groove 12e4 extending in the front-rear direction. Then, the surface layer pad 11 and the back layer pad 12 are integrated in a state where a part of the surface layer pad 11 intrudes therein. As a result, also in the front side 12a of the front part 12e, the contact area of the surface layer pad 11 and the back layer pad 12 increases and it is difficult for them to come off, and both are hardly peeled off. In addition, a plurality of cylindrical through holes 12d4 are provided on the side portion 12d of the back layer pad 12 in the vertical direction which is a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied. Then, the surface layer pad 11 and the back layer pad 12 are integrated in a state where a part of the surface layer pad 11 intrudes therein. As a result, in the side portion 12d, the contact area between the surface layer pad 11 and the back layer pad 12 is increased, the relative movement in the out-of-plane direction and the in-plane direction of the interface is difficult, and both are less likely to be peeled off.

  Although the specific embodiments have been described above, the present invention is not limited to these configurations, and various changes, additions, and deletions can be made without departing from the scope of the present invention. For example, the following may be mentioned.

  1. In the said embodiment, although this invention was applied to the cushion pad 10 of the sheet | seat 1 for motor vehicles, this invention can also be applied as a back pad of the seat back 3 as 2 layer structure of surface layer pad and back layer pad. Furthermore, the present invention may be applied to a vehicle seat pad mounted on an airplane, a ship, a train or the like.

  2. In the above embodiment, although the back layer pad 12 is made of an olefin-based bead foam resin such as polypropylene or polyethylene, the present invention is not limited thereto, and bead foam of a styrene-based resin or a composite resin of a styrene-based resin and an olefin-based resin It can also be made of resin.

  3. In the above embodiment, the cross sections of the fitting groove 12d11, the fitting groove 12d21, the fitting groove 12f11, and the fitting groove 12f21 are all formed in a substantially Ω (omega) shape, but a part is formed in a substantially U shape You may form and all may be formed in a substantially U shape.

  4. In the above embodiment, the cross section of the fitting groove 12e4 is formed in a substantially Ω (omega) shape, but may be formed in a substantially U shape. Also, the fitting groove 12e4 may be provided on the front side 12a of the side 12d or the rear 12f. Further, the extending direction of the fitting groove 12e4 is not limited to the front and rear direction, but may be the left and right direction, and may be any direction substantially perpendicular to the direction in which the seating pressure of the seated occupant is applied. .

  5. In the above embodiment, the through holes 12d4 are provided in the side portion 12d, but may be provided in the front portion 12e or the rear portion 12f. Further, the through hole 12d4 is not limited to a cylindrical shape, and may be a cylindrical shape having a polygonal cross section. Furthermore, it may be cylindrical with a bottom without penetrating vertically.

1 Car Seat 2 Seat Cushion 10 Cushion Pad (Seat Pad for Vehicle)
11 surface layer pad 12 back layer pad 12d1 outer wall surface portion 12d11 fitting groove (groove)
12d111 Straight part (opening)
12d112 Arc part (expanded part)
12d2 inner wall surface part 12d21 fitting groove (groove)
12e4 Mating groove (horizontal groove)
12f1 back wall part 12f11 fitting groove (groove)
12f2 Front wall part 12f21 Fitting groove (groove)

Claims (4)

A vehicle seat pad,
A surface layer pad on the side of the seating surface, and a back layer pad harder and less dense than the surface layer pad integrated on the opposite side of the seating surface of the surface layer pad;
The back layer pad extends in a direction substantially parallel to at least the direction in which the seating pressure of the seated occupant is applied, and a surface in contact with the surface layer pad has a substantially U-shaped cross section opening toward the surface layer pad And a plurality of grooves extending in a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied.
A vehicle seat pad in which the surface layer pad and the back layer pad are integrated in a state where a part of the surface layer pad intrudes into the groove.   The vehicle seat pad according to claim 1, wherein the cross section of the groove has an expanded portion in which the groove width is expanded on the groove bottom side opposite to the opening from the opening. The surface layer pad according to claim 1, wherein a cross section of the back layer pad extends in a direction substantially perpendicular to a direction in which a seating pressure of a seated occupant is applied and abuts against the surface layer pad. A plurality of transverse grooves extending in a direction substantially perpendicular to the direction in which the seating pressure of the seated occupant is applied, the opening being generally U-shaped toward the
A vehicle seat pad in which the surface layer pad and the back layer pad are integrated in a state where a part of the surface layer pad intrudes into the lateral groove. A cylindrical through hole or a cylindrical bottomed hole according to any one of claims 1 to 3, wherein the back layer pad extends in a direction substantially parallel to a direction in which a seating pressure of a seated occupant is applied. Is provided,
A vehicle seat pad in which the surface layer pad and the back layer pad are integrated in a state where a part of the surface layer pad intrudes into the through hole or the bottomed hole.

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