JP6211267B2 - Vehicle seat pad - Google Patents

Description

  The present invention relates to a vehicle seat pad, and more particularly to a seat pad with improved softness on the pad surface.

  In general, a seat pad made of a soft polyurethane foam having a high cushioning property is used for an automobile seat. The seat pad is placed on a support frame and covered with a skin material as a vehicle seat. It is configured.

  In order to obtain a soft feeling when seated in such a seat pad, there is a method in which a soft slab urethane foam is post-applied to the surface of a pad body made of foamed polyurethane foam. However, since this method attaches a slab of another part, it costs more as the number of parts increases and the attaching process increases, and since the slab is attached with an adhesive, it is difficult to lift up due to poor adhesion. There is a risk of quality defects.

  In Patent Document 1 below, a large number of convex portions are provided in at least a part of the occupant contact surface, and in Patent Document 2 described below, a large number of recesses are formed in at least a part of the occupant contact surface. It is disclosed that by providing a hole, the softness of the surface is improved and the occupant's support characteristics are improved.

JP 2009-78142 A JP 2009-160371 A

  When a large number of convex portions are provided on the pad surface as in Patent Document 1, since the concave portion is provided on the surface of the foaming mold in order to mold the convex portions, when the foaming stock solution is injected during molding In addition, it is difficult to fill the foamed undiluted solution in each recess, and molding defects such as lack of thickness tend to occur.

  In addition, even when a large number of concave holes are provided on the pad surface as in Patent Document 2, a large number of convex portions are provided on the surface of the foaming mold, so that it is difficult to fill the foaming stock solution and easily cause molding defects. The convex portion formed between the concave holes supports the passenger, but the convex portion is connected in a lattice shape and supports the occupant while compressively deforming when sitting, thereby improving the soft feeling when sitting. There is a limit.

  The present invention has been made in consideration of the above-described matters, and an object of the present invention is to provide a vehicle seat pad excellent in the effect of improving the soft feeling when sitting.

The vehicle seat pad according to the present invention is a vehicle seat pad including a pad main body made of a foamed resin molded body. The pad main body includes an occupant support portion that supports an occupant, and a front surface and a back surface of the occupant support portion. comprising a plurality of grooves extending linearly in a series along the width direction provided alongside in the longitudinal direction in at least one, and a plurality of ridges formed between a plurality of said grooves, said grooves Is characterized in that the occupant support part is recessed with an inclination in the parallel direction of the groove with respect to the surface provided with the groove.

  According to the present invention, a plurality of concave grooves are provided side by side on at least one of the front and back surfaces of the pad main body, and are inclined and recessed in the parallel direction of the concave grooves, so that they are formed between the plurality of concave grooves when seated. Further, the plurality of ridges can be bent and deformed so as to fall down, and the soft feeling at the time of sitting can be improved. In addition, since the plurality of concave grooves provided in the pad main body are arranged side by side, it is difficult to cause a lack of wall due to poor liquid surroundings of the foaming stock solution during foam molding of the pad main body, thereby improving the moldability. .

1 is a plan view of a vehicle seat pad according to a first embodiment of the present invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is sectional drawing of the foam formation type | mold of the seat pad shown in FIG. It is sectional drawing of the vehicle seat pad which concerns on 2nd Embodiment of this invention. It is a top view of the vehicle seat pad which concerns on 3rd Embodiment of this invention. It is a top view of the vehicle seat pad which concerns on the example of a change of 3rd Embodiment of this invention. It is a top view of the vehicular seat pad concerning a 4th embodiment of the present invention. It is sectional drawing of the vehicle seat pad which concerns on 5th Embodiment of this invention.

(First embodiment)
Embodiments of the present invention will be described below with reference to the drawings.

  A vehicle seat pad (hereinafter referred to as a seat pad) 10 according to the first embodiment shown in FIGS. 1 to 3 is used to support a occupant's buttocks in a car seat. And a material 13. In the present embodiment, the case where the pad body 12 is a cushion pad will be described. However, the present invention can also be applied to a back pad that supports the back of an occupant, and the same effect can be obtained in the back pad. .

  The pad main body 12 is a cushion pad made of a foamed molded product having elasticity such as a flexible polyurethane foam, and is positioned at the center in the width direction to receive and support a passenger's buttocks and thighs, Side portions 16 and 16 are formed on the left and right sides so as to protrude upward.

  A pair of front and rear lateral grooves 24 extending in the width direction X and a pair of left and right vertical grooves 26 extending in the front-rear direction Y are provided on the surface (upper surface) of the pad main body 12 to lock the skin material 13 covering the pad main body 12. Is provided. And the width direction outer side becomes a side part 16 rather than a pair of vertical groove 26, and the passenger | crew support part 14 which supports a passenger | crew between the pair of vertical grooves 26 is defined. The occupant support portion 14 is formed with a bottom portion 18 that mainly supports the occupant's buttocks between a pair of front and rear lateral grooves 24, and a thigh receiving portion 20 that mainly supports the occupant's thighs forward from the front lateral groove 24. A compartment is formed.

  A plurality of concave grooves 28 extending in the width direction X are provided on the surfaces of the bottom part 18 and the thigh receiving part 20 constituting the occupant support part 14. The plurality of concave grooves 28 are arranged in a predetermined direction (in this embodiment, the front-rear direction Y) at intervals without being connected to each other.

  Specifically, the plurality of concave grooves 28 are inclined in the direction toward the front Y1 as the depth increases from the surface where the concave grooves 28 are provided (that is, the surfaces of the bottom part 18 and the thigh receiving part 20). Are recessed inclining in the direction (front-rear direction) Y in which they are arranged in parallel.

  Due to the plurality of concave grooves 28 arranged in this manner, a plurality of ridges 32 that rise obliquely toward the rear Y2 as it goes upward are formed on the surfaces of the bottom part 18 and the thigh receiving part 20 in the front-rear direction Y Are arranged side by side.

  In addition, the angle θ in the direction in which the recessed groove 28 is depressed with respect to the surface on which the recessed groove 28 is provided can be set in a range between 5 ° and 85 °, for example.

  In the present embodiment, the groove width W and the depth H of the concave groove 28 provided on the surfaces of the bottom part 18 and the thigh receiving part 20 are provided substantially constant in the width direction X of the pad main body 12 (FIG. 2). 3). Further, the concave groove 28 is separated from the vertical groove 26 extending in the front-rear direction Y by connecting portions 30 provided at both ends in the width direction of the bottom part 18 and the thigh receiving part 20, and both ends of the concave groove 28 in the width direction X. Terminates at a distance from the longitudinal groove 26 (see FIGS. 1 and 3). Thereby, the width direction both ends of the plurality of ridges 32 provided in the bottom part 18 and the thigh receiving part 20 are connected by the connecting part 30.

  In order to manufacture the seat pad 10 described above, for example, foam molding can be performed using a foam molding die 50 as shown in FIG.

  The foaming mold 50 includes a lower mold 52 that opens upward to mold the pad surface side, and an upper mold 54 that molds the pad back surface side. The upper die 54 is provided so as to be rotatable with respect to the lower die 52 via a hinge 56 disposed on one side of the lower die 52. By opening and closing the upper surface opening of the lower die 52, A cavity 58 that is a foaming space corresponding to the pad shape is formed between the two.

  The lower mold 52 is provided with suspending groove protrusions 60 for forming the lateral grooves 24 and the longitudinal grooves 26, and on the bottom part 18 and the thigh receiving part 20 surrounded by the suspending groove protrusions 60. A groove forming protrusion 62 for forming the groove 28 is provided at a corresponding position. The groove forming ridges 62 form a plate shape and incline toward the front Y1 of the pad main body 12 as they go upward from the mold surface of the lower mold 52, and a plurality of the groove forming ridges 62 are provided at intervals in the front-rear direction Y.

  Using such a foam molding die 50, the foaming stock solution is injected into the lower die 52 from an injection device (not shown), and the die is closed as shown in FIG. 3 to foam the pad main body 12 in the cavity 58. . Then, after the pad main body 12 is foam-molded, the upper mold 54 is opened and removed to obtain the pad main body 12. The obtained pad body 12 covers the pad surface with the skin material 13 using the lateral grooves 24 and the longitudinal grooves 26, and is locked, whereby the seat pad 10 is obtained.

  In the seat pad 10 of the present embodiment configured as described above, the plurality of concave grooves 28 arranged side by side on the surface of the pad main body 12 are inclined and recessed in the parallel direction. The plurality of ridges 32 formed in the shape can be bent and deformed so as to fall down, and the soft feeling at the time of sitting can be improved.

  Further, since the plurality of concave grooves 28 provided in the pad main body 12 are arranged side by side at intervals, a groove molding protrusion 62 for molding the concave grooves 28 is formed on the mold surface of the lower mold 52 in the front-rear direction Y. The space provided at intervals is extended continuously in the width direction without branching the space sandwiched between the groove-forming protrusions 62. Therefore, at the time of foam molding of the pad main body 12, the foaming stock solution easily flows between the groove molding ridges 62, and it is difficult to cause a lack of thickness due to a poor liquid periphery, and the moldability can be improved.

  Moreover, in the seat pad 10 of this embodiment, since the width direction both ends of the some protruding item | line 32 formed by the some groove 28 are connected by the connection part 30, the bottom part 18 and the thigh receiving part 20 are connected. It is possible to increase the rigidity of both sides while keeping the central portion in the width direction flexible, and to firmly support the occupant's body from the side after sitting while obtaining a good soft feeling when sitting.

  In addition, in the seat pad 10 of the present embodiment, the deeper the plurality of concave grooves 28 are, the deeper the concave grooves 28 are inclined in the direction toward the front Y1, and the higher the ridges 32 formed between the concave grooves 28 are, the higher upward. Since it protrudes diagonally toward the rear Y2, the ridge 32 falls to the rear Y2 when seated, and the occupant who often sits in a shallow position of the cushion pad is guided to the rear Y2 and guided to a desired seating position. I can.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.

  In the seat pad 10 of the first embodiment described above, the case where the depth H of the recessed groove 28 provided in the occupant support portion 14 is provided substantially constant in the width direction X of the pad main body 12 has been described. In the seat pad 10A, the recessed groove 28a is recessed deeper toward the center in the width direction, and the depth of the center portion in the width direction of the recessed groove 28a is deeper than the depth at both ends in the width direction.

  In such a seat pad 10A of the present embodiment, the dimension in which the ridges 32a protrude upward at the center in the width direction can be set larger than the dimension in which the ridges 32a protrude upward at both ends in the width direction. Therefore, the rigidity of both sides can be increased while keeping the bottom part 18 and the center part of the thigh receiving part 20 flexible, and the body of the occupant can be firmly secured from the side after sitting while obtaining a good soft feeling when sitting. And can support.

  Other configurations and operational effects are the same as those in the first embodiment, and a description thereof will be omitted.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS.

  In the seat pad 10 of the first embodiment described above, the case where the groove width W of the recessed groove 28 provided in the occupant support portion 14 is provided substantially constant in the width direction X of the pad main body 12 has been described. In the seat pad 10B shown in FIG. 6 and the seat pad 10C shown in FIG. 7, the groove width W of the concave grooves 28b and 28c increases toward the central portion in the width direction, and the central portion in the width direction of the concave grooves 28b and 28c. The groove width is wider than the groove width at both ends in the width direction.

  In the seat pads 10B and 10C of this embodiment as described above, the protrusions 32b and 32c formed by the plurality of grooves 28b and 28c have a thickness dimension in the front-rear direction Y at the center in the width direction, at both ends in the width direction. Since it is smaller than the thickness dimension in the front-rear direction Y, it is possible to increase the rigidity of both sides while keeping the bottom part 18 and the center part in the width direction of the thigh receiving part 20 flexible, and obtaining a good soft feeling at the time of sitting. The occupant's body can be firmly supported from the side.

  Other configurations and operational effects are the same as those in the first embodiment, and a description thereof will be omitted.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIG.

  In the seat pad 10 of the first embodiment described above, the concave grooves 28 provided in the occupant support portion 14 are longitudinally extended in the front-rear direction Y by the connecting portions 30 provided at both ends in the width direction of the bottom portion 18 and the thigh receiving portion 20. The case where the groove 26 is divided and the both ends in the width direction X of the groove 28 are terminated with a space from the vertical groove 26 has been described, but in this embodiment, the groove provided in the bottom portion 18 is provided. The end of 28 d communicates with the longitudinal groove 26.

  In such a seat pad 10D of the present embodiment, both end portions in the width direction of the concave groove 28d communicate with the vertical groove 26, and both end portions in the width direction of the plurality of protrusions 32d formed by the concave grooves 28d are connected to each other. Since it is not carried out, the said protruding item | line 32d becomes still easier to fall down at the time of sitting, and the soft feeling at the time of sitting can be improved.

  Further, in the present embodiment, the concave groove 28d provided in the bottom part 18 communicates with the vertical groove 26, and the concave groove 28 provided in the thigh receiving part 20 is separated from the vertical groove 26 by the connecting part 30. Although the case where the bottom part 18 is made more flexible than the part 20 has been described, not only the bottom part 18 but also the concave groove 28 provided in the thigh receiving part 20 may be communicated with the vertical groove 26.

  Other configurations and operational effects are the same as those in the first embodiment, and a description thereof will be omitted.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to FIG.

  In the seat pad 10 according to the first embodiment described above, the case where the concave groove 28 is provided on the surface of the occupant support portion 14 has been described. However, in this embodiment, the concave groove 28 is provided on the front surface and the back surface of the occupant support portion 14. Yes.

  Specifically, as shown in FIG. 9, in the seat pad 10 </ b> E of the present embodiment, a plurality of concave grooves 28 extending in the width direction X are provided on the surfaces of the bottom part 18 and the thigh receiving part 20 constituting the occupant support part 14. In addition, a plurality of concave grooves 28 e extending in the width direction X are also provided on the back surface.

  The concave groove 28e provided on the back surface of the bottom part 18 and the thigh receiving part 20 is provided at a position where the support frame 34 that supports the seat pad 10 abuts. The concave groove 28e is provided side by side in the front-rear direction Y in the same manner as the concave groove 28a provided on the surface, and is inclined in the front-rear direction Y with respect to the bottom surface of the bottom 18 and the thigh receiving part 20 provided with the concave groove 28e. And is recessed.

  In the seat pad 10E of this embodiment, since the recessed grooves 28 and 28e are provided on the front and back surfaces of the occupant support portion 14, they are provided not only on the recessed grooves 28 provided on the front surface but also on the back surface. The concave groove 28e can also be deformed so as to fall down, and the soft feeling at the time of sitting can be further improved.

  Further, by providing the concave grooves 28 and 28e on the front and rear surfaces of the occupant support portion 14, the concave grooves 28 necessary for obtaining the same degree of flexibility as compared with the case where the concave grooves are provided on one of the front and rear surfaces. 28e can be reduced, the protruding amount of the ridges 32, 32e formed by the concave grooves 28, 28e is reduced, and the moldability and durability of the pad body 12 can be improved.

(Other embodiments)
In each of the above-described embodiments, the case of the cushion pad that supports the occupant's buttocks as the pad main body 12 provided with the concave groove 28 has been described. In this case, the concave groove provided in the back pad can be recessed deeper than the concave groove provided in the cushion pad.

  In the above-described embodiment, the case where the plurality of concave grooves 28 extending along the width direction X are provided side by side in the front-rear direction Y has been described. However, the present invention is not limited to this, and for example, the front-rear direction A plurality of concave grooves 28 extending along Y may be provided side by side at intervals in the width direction X.

  Furthermore, in the above-described embodiment, a case has been described in which both end portions in the width direction of the plurality of ridges 32 formed by the concave grooves 28 are connected by the connecting portions 30, but the present invention connects adjacent ridges 32. You may provide the connection part to perform in the desired position of the extending direction of the protruding item | line 32. FIG. Thus, by changing the position of the connecting portion, the rigidity of the convex portion 32 can be adjusted at a desired position in the extending direction.

  Although not enumerated one by one, various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Seat pad 12 ... Pad main body 13 ... Skin material 14 ... Passenger support part 16 ... Side part 18 ... Bottom part 20 ... Thigh receiving part 24 ... Horizontal groove 26 ... Vertical groove 28 ... Concave groove 30 ... Connection part 32 ... Convex strip

Claims (7)

In a vehicle seat pad provided with a pad body made of a foamed resin molded body,
The pad body includes an occupant support portion that supports an occupant, and a plurality of concave grooves that extend linearly in a row along a width direction that are arranged in the front-rear direction on at least one of the front and back surfaces of the occupant support portion. A plurality of ridges formed between the plurality of concave grooves,
The vehicular seat pad is characterized in that the concave groove is recessed in an anteroposterior direction with respect to a surface provided with the concave groove in the occupant support portion.   2. The vehicle seat pad according to claim 1, wherein the recessed groove is provided along a width direction on a surface of the pad main body, and is recessed deeper toward a center portion in the width direction.   The vehicle seat pad according to claim 1, wherein the concave groove is provided along a width direction on a surface of the pad main body, and the groove width becomes wider toward a center portion in the width direction. The pad body includes a longitudinal groove extending along a direction perpendicular to the width direction on the surface,
The vehicle according to any one of claims 1 to 3, wherein the concave groove is provided along a width direction on a surface of the pad main body and terminates with a gap from the vertical groove. Seat pad. The pad body includes a longitudinal groove extending along a direction perpendicular to the width direction on the surface,
The said concave groove is provided along the width direction on the surface of the said pad main body, The edge part of the said concave groove is connected to the said vertical groove, The any one of Claims 1-3 characterized by the above-mentioned. Vehicle seat pad.   The said recessed groove is provided in the surface of the said passenger | crew support part of the said pad main body along the width direction, and is inclined and dented in the direction which goes ahead, so that it becomes deep, The one of Claims 1-5 characterized by the above-mentioned. The vehicle seat pad according to claim 1. The vehicle seat pad according to any one of claims 1 to 6 , wherein the concave groove is provided on a front surface and a back surface of the pad main body.

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