JP2006000416A - Seat pad - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve surface touchness and sitting comfortability by solving defective hardness from a pad surface side caused by hardening of a backing cloth impregnated with a flexible foam. <P>SOLUTION: In a seat pad 10 provided with a pad body 12 consisting of the flexible foam and the backing cloth 14 laminated and integrated by foaming of the flexible foam on the rear surface of the pad body 12, a housing recess part 24 for housing an air back system A is provided at a place for pasting the backing cloth 14 on the rear surface side of the side part 18 of the pad body 12, and a through hole 44 is bored at a backing cloth part corresponding to an inner corner part 28 projecting toward the pad surface side in the corner parts of the housing recess part 24. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a seat pad used as a seat cushion material for a vehicle or the like.

  In general, a seat pad used as a seat cushion material of an automobile or the like is made of a flexible foam molded product such as a flexible polyurethane foam. Such a seat pad is configured as a seat by being assembled to the seat frame, but there is a problem that abnormal noise is generated or damaged due to vibration with the seat frame or friction with the seat frame during seating. Therefore, in order to prevent the occurrence of such abnormal noise or to protect and strengthen from damage, it is possible to integrate a backing fabric such as a nonwoven fabric by foam molding of the flexible foam on the back surface of the pad body made of the flexible foam. (For example, see Patent Documents 1 to 3 below).

  By the way, in recent automobiles, there is a case where a side airbag device that inflates an airbag and restrains an occupant from the side at the time of a vehicle collision is mounted, and such a side airbag device has, for example, a seat backrest portion. It is embedded in the door side of the back pad that constitutes.

FIG. 10 is a view showing a part of the back pad 100 formed so that the side airbag device can be attached. As shown in the figure, an accommodation recess 104 for accommodating the side airbag device 120 is provided on the back side of the side portion 102, and the pad thickness in the side portion 102 is reduced by the provision of the accommodation recess 104. It has become. In particular, in the inside corner portion 106 shown in FIG. By the way, the pad main body 110 is laminated and integrated with a backing cloth 112 such as a nonwoven fabric by foam molding of polyurethane foam on the back surface thereof. It will be. Therefore, if there is a corner portion 106 of the backing cloth 112 cured by impregnation behind the thin pad portion 108 as described above, hardness is felt from the surface side of the side portion 102, and the surface feel of the back pad is felt. Impairs sitting comfort.
JP-A-6-171002 JP-A-6-171003 JP 2000-71838 A

  The present invention has been made in view of the above points, and eliminates the poor hardness from the pad surface side caused by the impregnation and hardening of the flexible foam on the backing cloth, and is excellent in surface touch and sitting comfort. It aims at providing the pad for sheets.

  The pad for a sheet according to the present invention is a pad for a sheet comprising a pad main body made of a flexible foam, and a backing cloth laminated and integrated on the back surface of the pad main body by foam molding of the soft foam. A corner portion projecting to the front surface side of the pad main body is provided at a portion where the backing cloth is attached on the back surface side, and a through hole is provided in the backing cloth portion corresponding to the corner portion.

  In this way, in the corner portion protruding to the pad surface side of the pad body pasting portion in the pad main body, the back cloth portion corresponding to the corner portion is provided with a through hole, and the portion of the backing cloth is excised. There is no longer a cloth portion impregnated and hardened with the flexible foam at the corner portion where the hardness failure from the side is likely to occur, and the hardness failure from the pad surface side can be eliminated.

  In the present invention, the corner portion is not limited as long as it is a corner portion protruding to the pad surface side in the backing cloth pasting portion on the pad back surface side, but the following mode is particularly preferable. That is, in the seat pad, an accommodation recess for accommodating the airbag device is provided on the back side of the side portion of the pad main body, and a corner protruding from the corner of the accommodation recess to the front surface side of the pad main body. In the portion, the through hole is provided in the backing cloth portion corresponding to the corner portion. In general, parts of the airbag device are common to other types of seat pads. Therefore, although the shape of the side portion varies among the seat pads, the dimensions of the housing recess for the airbag device are common. Is often required. For this reason, depending on the type of the pad for the sheet, the thickness of the pad main body between the housing recess and the pad surface is not sufficiently secured, and the above-described hardness failure is likely to occur. Thus, by providing the above-described through hole in the corner behind the thin pad portion, the hardness defect can be eliminated.

  In the present invention, the corner portion may be a two-surface joint portion, but it is more effective to apply to a three-surface joint portion in which poor hardness is likely to occur. Further, the shape of the through hole is not particularly limited, and may be a circle, a square, a triangle, or the like.

  As described above, according to the present invention, in the pad for a sheet having the backing cloth laminated and integrated on the back surface of the pad main body by foam molding, the pad surface resulting from the impregnation and hardening of the flexible foam on the backing cloth The hardness defect from the side can be eliminated, and the surface feel and sitting comfort can be improved.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  1 and 2 are perspective views of a pad 10 for a sheet according to an embodiment of the present invention, and FIGS. 3 and 4 are cross-sectional views of the pad 10. As shown in the figure, this seat pad 10 is a back pad used for a backrest portion of a front seat of an automobile, for example, and is laminated and integrated on the back surface of a pad body 12 made of a highly elastic flexible polyurethane foam. It consists of a backing cloth 14 and is assembled to the seat frame.

  As shown in FIG. 1, the pad main body 12 includes a main portion 16 at the center in the width direction that catches the back of the occupant, and a pair of left and right side portions 18 a and 18 b that are formed in a raised shape on both sides in the width direction. In addition, as shown in FIGS. 2 and 3, an inward flange-like overhanging portion 20 for frame mounting is integrally formed on the back side of the pad main body 12 on the three sides of the upper side and the left and right sides. As a result, the pad main body 12 has a generally bag shape as a whole. A mounting hole 22 for mounting a headrest (not shown) is provided on the upper surface of the pad main body 12.

  Moreover, in the side part 18a by the side of the door, the accommodation recessed part 24 for accommodating the side airbag apparatus A is provided in the back surface side. As shown in FIG. 4, the accommodating recess 24 can accommodate the box-shaped side airbag device A in the recessed groove portion 26 extending in the vertical direction formed between the protruding portion 20 on the back surface side of the side portion 18. In addition, it is formed by sinking into a square toward the pad surface side. Thereby, the accommodation recessed part 24 is provided with the inner side corner | angular part 28 of the width direction inner side, and the outer side corner | angular part 30 of the width direction outer side as a corner | angular part which protrudes to the pad surface side. A passage 32 for inflating and deploying an airbag (not shown) of the side airbag device A is formed in the side wall portion of the housing recess 24 (see FIGS. 1, 2, and 4).

  The backing cloth 14 is integrated by polyurethane foam foaming so as to cover substantially the entire back surface of the main portion 16 and the side portions 18a and 18b including the inner surface of the housing recess 24. The side surface is also covered with the backing cloth 14. Here, the backing cloth 14 plays a role of protecting the pad main body 12 and suppressing generation of a rubbing sound with the seat frame (not shown), and can play such a role. Any non-woven fabric, woven or knitted fabric, or a laminated composite of these can be used without particular limitation. Generally, a coarse blanket, a cold chill, a felt, or the like is used.

  The shape of the base fabric constituting the backing cloth 14 is as shown in FIG. 6, and the edges facing each other on the left and right sides of the upper end portion are sewn together by the sewing portion 34, so that the bottom fabric 14 faces downward as shown in FIG. An opened bag-like portion 36 is formed. Moreover, the opening part 40 corresponding to the said channel | path 32 is provided in the side edge part corresponding to the side part 18a by the side of a door by sewing with the sewing part 38 (refer FIG. 6) (refer FIG. 7). . Reference numeral 42 denotes an opening for the headrest, and is provided at a position corresponding to the mounting hole 22 of the pad main body 12.

  In the present embodiment, in the sheet pad 10, in the present embodiment, as shown in FIG. 4, among the corners protruding toward the pad surface in the accommodation recess 24, the inner corner 28 corresponds to the corner 28. A through hole 44 is provided in the backing cloth portion to be formed, and therefore, the polyurethane foam constituting the pad main body 12 is exposed at the corner portion 28. More specifically, as shown in FIG. 5, the through hole 44 has an apex portion (an angle that is a three-surface joint portion) where three surfaces of the upper wall surface 24 a, the front wall surface 24 b, and the inner wall surface 24 c in the housing recess 24 are bonded. Part) 28.

  In this embodiment, the shape of the through hole 44 is a circular shape shown in FIG. 8A, but is not limited to this, for example, a rectangular shape such as a square or a rectangle shown in FIG. Further, various shapes such as a triangular shape shown in FIG.

  When manufacturing the pad 10 for sheet | seat, the base fabric which comprises the lining cloth 14 in the shape shown in FIG. 6 is produced by stamping etc. first. At that time, a circular through hole 44 is provided in a portion corresponding to the inner corner portion 28 on the side edge portion corresponding to the door side portion 18a. Then, the backing cloth 14 shown in FIG. 7 is produced by applying predetermined sewing 34 and 38 to the base cloth.

  Next, as shown in FIG. 9, the produced backing cloth 14 is mounted in a mold 50 and the pad main body 12 is foam-molded. Here, the mold 50 includes a lower mold 52 that is recessed so as to mold the surface side portion of the pad main body 12, and an upper mold that opens and closes the upper surface opening of the lower mold 52 to form a cavity 54 that is a foaming space. 56, and the upper die 56 is provided with a core die 58 for molding the overhanging portion 20.

  In the foam molding, first, the backing cloth 14 is put on the core mold 58, fixed with a pin (not shown), and set on the upper mold 56 side in the cavity 54. At this time, as shown in FIG. 9, the through hole 44 of the backing cloth 14 coincides with the corner portion 60 of the core mold 58 that molds the inner corner portion 28, so that the corner portion 60 is exposed in the cavity 54. Then, the backing cloth 14 is arranged. Further, the core mold 58 is provided with a convex portion 62 for forming the passage 32 for the above-described airbag, and the convex portion 62 is inserted into the opening 40 of the backing cloth 14.

  Next, after injecting a polyurethane foam foaming stock solution U into the cavity 54 using an injector (not shown), the upper mold 56 is closed to seal the cavity 54. Thereby, the foaming stock solution U is foam-filled in the cavity 54, the pad main body 12 made of polyurethane foam is foam-molded, and the backing cloth 14 is integrated on the back surface thereof. After molding, the upper die 56 is opened, the core die 58 is further detached from the upper die 56, the die is opened, and then the mold is removed, whereby the sheet pad 10 is obtained.

  In the sheet pad 10 according to the present embodiment as described above, the backing corresponding to the inner corner portion 28 on the back side of the portion 46 where the thickness of the pad main body 12 is reduced by providing the housing recess 24. A through hole 44 is provided in a portion of the cloth 14 and the backing cloth 14 in that portion is cut out. Therefore, in the thin portion 46, there is no square backing cloth cured by impregnation with polyurethane foam, so that the hardness from the surface of the side portion 18a can be reduced. Therefore, the hardness defect from the pad surface side can be eliminated, and surface tactile sensation and sitting comfort can be improved.

  In the above-described embodiment, the through hole 44 is provided only in the corner corresponding to the three-surface joint portion in the inner corner portion 28 of the housing recess 24. However, the present invention is not limited to this. Similarly, through holes 44 can be provided at the corners of the joints to eliminate hardness defects from the surface. In the case of a two-surface junction, a through hole extending linearly along the intersection may be provided. Further, not only the inner corner portion 28 of the housing recess 24 but also the outer corner portion 30 can be similarly provided with a through hole.

  Furthermore, not only the housing recess for such an airbag device, but also the housing recess for embedding various devices in the seat pad, as long as it is a housing recess provided in the backing portion of the backing cloth, Similarly, the present invention is applicable. In addition, the present invention is not limited to the concave portion for accommodating any device as described above, and the same applies to the corner portion as long as it has a corner portion protruding to the pad surface side at the portion where the backing cloth is attached to the pad body. The present invention can be applied to. That is, the present invention is applicable to various places where poor hardness from the pad surface side due to the impregnated square backing cloth is a problem.

  In the above embodiment, the seat back pad used for the back portion of the automobile seat has been described. However, the seat back pad can be applied to a pad other than the back pad, for example, a seat cushion pad constituting a seat surface portion that receives the buttocks. It can also be applied to pads of sheets other than those for automobiles.

It is the perspective view seen from the slanting front of the pad for sheets concerning one embodiment of the present invention. It is the perspective view seen from diagonally back of the pad for the sheets. It is a longitudinal cross-sectional view in the up-down direction of the pad for sheets. It is a longitudinal cross-sectional view in the width direction of the pad for sheets. It is a principal part expansion perspective sectional view of the pad for the sheet. It is an expanded view of the backing cloth used for the pad for the sheet. It is a perspective view after the sewing of the back lining cloth. (A)-(c) is a figure which shows the shape of the through-hole provided in the same backing cloth. It is a principal part expanded sectional view of the shaping | molding die at the time of shaping | molding of the said pad for sheets. It is a partial expanded sectional view of the conventional sheet pad.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Seat pad 12 ... Pad main body 14 ... Backing cloth 18a ... Door side part 24 ... Housing recessed part 28 ... Inside corner part of housing recessed part 44 ... Through-hole A ... Side airbag apparatus

Claims (4)

In a pad for a sheet comprising a pad body made of a flexible foam and a backing cloth laminated and integrated by foam molding of the flexible foam on the back surface of the pad body,
A corner portion projecting to the front surface side of the pad main body is provided at a portion where the backing cloth is attached to the back surface side of the pad main body, and a through hole is provided in the back cloth portion corresponding to the corner portion. Sheet pad to be used.   An accommodation recess for accommodating the airbag device is provided on the back surface side of the side portion of the pad body, and corresponds to the corner portion of the corner portion of the accommodation recess that protrudes to the surface side of the pad body. The sheet pad according to claim 1, wherein the through hole is provided in a backing cloth portion to be formed.   The sheet pad according to claim 1, wherein the corner portion is a three-surface joint portion.   The sheet pad according to any one of claims 1 to 3, wherein the shape of the through hole is a circle, a quadrangle, or a triangle.

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