JP2005145112A - Vehicle headlining structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a head lining structure of a vehicle capable of increasing the rigidity of a head lining without adding other members. <P>SOLUTION: A synthetic resin head lining 1 lined on the ceiling of the vehicle is formed so that a band-like high-dense area 10 can be formed in the head lining 1 along the longitudinal direction of the vehicle. By this, the head lining 1 in the longitudinal direction can be increased withtout changing its weight, and the mounting workability of the head lining 1 can be increased. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a headlining structure lining a ceiling of a vehicle.

  In recent years, automobiles have been equipped with curtain airbags for head protection, and in the event of a side collision, an airbag inflated between the passenger's head and the side in the vehicle width direction in the passenger compartment is instantaneously interposed. In this case, the curtain airbag is housed in a space provided at the upper inner side of the vehicle width direction side portion of the headlining.

The curtain airbag is deployed downward along the side surface of the vehicle interior while pushing away the side portion in the vehicle width direction of the head lining at the time of a side collision, and is interposed between the passenger's head and the side surface of the vehicle interior. (For example, refer to Patent Document 1).
JP 2002-321586 A (page 3-5, FIG. 4)

  However, the head lining in the case where the conventional curtain airbag is provided is formed by partially cutting in the front-rear direction on the side portion in the vehicle width direction that is pushed away when the airbag is deployed. The breaking portion is broken by the unfolding force, and the side portion of the head lining is pushed downward around the broken portion.

  By the way, the headlining is tightened together with the sunroof peripheral edge dual lock type fastener, sun visor, assist grip, etc., but this headlining is originally made of a synthetic resin material and has a low rigidity. The vehicle longitudinal direction is easily bent up and down with respect to the axis along the direction.

  For this reason, it becomes difficult to attach the head lining. In particular, when notches are provided on both side portions in the vehicle width direction in order to deploy the airbag, the rigidity is further reduced at the formed portions.

  Accordingly, the present invention provides a headlining structure for a vehicle that can increase the rigidity of the headlining without adding other members.

  The main feature of the present invention is that a belt-shaped high-density region is formed along the vehicle front-rear direction at the time of molding on a synthetic resin headlining lined on the ceiling of the vehicle.

  According to the vehicle head lining structure of the present invention, the high-density region formed at the time of molding becomes a belt-like shape along the vehicle longitudinal direction, so that the bending stiffness in the longitudinal direction of the head lining can be changed in weight. There is an advantage that the mounting operability of the headlining can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 7 show a first embodiment of a vehicle headlining structure according to the present invention, FIG. 1 is a perspective view of the headlining, FIG. 2 is a plan view of the headlining, and FIG. FIG. 4 is a cross-sectional view of a main part schematically showing a molding state of the head lining, FIG. 5 is a perspective view showing a main part of a bead forming portion of the head lining, and FIG. FIG. 7 is an explanatory view showing the configuration by a perspective view of (a), a cross section taken along line BB of (b), and a cross section taken along line CC of (c), and FIG. 7 is an explanatory view showing angle limitation of the groove shape of the bead. .

  In the structure of the first embodiment, as shown in FIGS. 1 and 2, the head lining 1 is formed with a synthetic resin material in a shape along the inner surface of the ceiling so that it can be lined on the ceiling of the vehicle. Yes, the peripheral edge and the rear edge of the sunroof 2 are fixed to the inner surface of the roof by the dual lock member 3, and are fastened and fixed to the inner surface of the roof together with a sun visor, an assist grip, etc., not shown. In FIGS. 1 and 2, 4 is a sun visor mounting portion, and 5 is an assist grip mounting portion.

  As shown in FIG. 4, the headlining 1 has urethane 1A as a base material, and a surface 1B on the front surface (lower surface in the drawing) and a backing film 1C on the back surface (upper surface in the drawing). Thus, hot press molding is performed by sandwiching the press mold 5 between the upper mold 5a and the lower mold 5b.

  As shown in FIGS. 1 to 3, a curtain airbag 7 is attached to an inner rail 6 a of the roof side rail 6 on one side of the inner surface of the ceiling, as shown in FIGS. 1 to 3. A vehicle width direction side portion 1d of the head lining 1 is covered, and a terminal portion of the side portion 1d is brought into contact with an upper end of a garnish 8 that covers the inside of the center pillar (not shown).

  As is generally known, the curtain airbag 7 includes a gas generator (inflator), a bag, a strap, and the like, detects a side collision, inflates the bag with gas generated by the gas generator, and this bag is a headlining. The occupant is protected by pushing the side portion in the vehicle width direction of 1 and entering the space between the passenger compartment side surface and the occupant instantaneously.

  On the other hand, on both sides in the vehicle width direction of the head lining 1, as shown in FIG. 3, strip-shaped high-density regions 10 are formed substantially symmetrically in the left-right direction along the longitudinal direction of the vehicle body.

  As shown in FIG. 4, when the headlining 1 is hot press-molded, the high-density region 10 is formed by increasing the pressing force at the protruding portion 5a 'formed on the upper die 5a, so that the urethane 1A and the skin of that portion are increased. 1B and the backing film 1C are pressed with a larger pressure than other portions, and the portions are formed with high density.

  In the present embodiment, as shown in FIG. 5, the high-density region 10 is formed as a groove-shaped bead 11 by the protruding portion 5 a ′ thus formed on the upper mold 5 a, and this bead 11 is used as the headlining 1. It is formed on the upper surface.

  As shown in FIG. 3, the bead 11 is formed above the lower edge 7 a of the curtain airbag 7.

  Accordingly, since the beads 11 have a high-density but concave shape, the side portion 1d of the head lining 1 can be bent up and down with respect to the vehicle width direction with the bead 11 as the center. When the bag is inflated, the side portion 1d is bent downward from the bead 11 so that the bag can enter the vehicle interior.

  As shown in FIG. 6, in the bead 11, in addition to the end walls W1 and W2 having the height h, the wall surfaces W3 and W4 having the opposite height h ′ (h> h ′) of the bead 11 are increased. These wall surfaces W3 and W4 can be raised walls to increase the strength.

  Then, as shown in FIG. 7, the groove shape of the bead 11 is regulated so that it becomes a hinge point when the curtain airbag 7 is deployed.

  That is, as shown in FIG. 7, the bottom corner 11K1 on the inner side of the bead 11 is a hinge point P, and the inner corner θ1 formed by the hinge point P is the bottom corner 11K2 on the outer side of the bead 11. The angle θ2 formed with the inclination direction (inclination angle β) of the side portion 1d and the angle α formed by the pressing force F when the curtain airbag 7 is deployed with the horizontal plane H are regulated.

  The regulation condition is that the angle (α + β) formed by the input direction of the pressing force F with respect to the head lining 1 is divided at 90 degrees, and when (α + β) is 90 degrees or more, θ2 is (α + β). And when [theta] 1 is greater than [theta] 2 and ([alpha] + [beta]) is less than 90 degrees, [theta] 2 is less than ([alpha] + [beta]), [theta] 1 is greater than 90 degrees, and [beta] is less than 90 degrees. .

  With the above configuration, according to the headlining structure of the first embodiment, when the headlining 1 is press-molded, the belt-like high-density regions 10 along the vehicle longitudinal direction are formed on both sides in the vehicle width direction. Therefore, this high-density region 10 has the advantage that the bending rigidity in the front-rear direction of the headlining can be increased without changing the weight, and consequently the mounting operability of the headlining can be improved.

  Further, since the high-density region 10 can be formed as a bead by increasing the pressing force when the headlining 1 is press-molded, the high-density region 10 can be provided at the same time by one press molding. The work of forming the high-density region 10 can be facilitated without increasing the number of steps.

  Further, since the bead 11 is positioned above the lower edge of the curtain airbag 7 attached to the roof side rail 6, it is possible to increase the bending rigidity in the front-rear direction of the headlining 1 when the vehicle is assembled, and the side collision. When the curtain airbag 7 is deployed at the time, the head lining side portion 1d can function as a hinge point P that bends and deforms in the vertical direction so that the bag can pass smoothly.

  Further, since the bead 11 has a groove shape, and the groove shape is regulated so that one groove corner becomes the hinge point P when the curtain airbag 7 is deployed, the one groove corner of the bead 11 is reliably hinged. Since the curtain airbag 7 can pass through the point P, the reliability of the curtain airbag 7 can be further improved.

  FIG. 8 shows a second embodiment of the present invention, in which the same components as in the first embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. It is sectional drawing.

  In the headlining structure of the second embodiment, as shown in FIG. 8, a plurality of (three in this embodiment) beads 11, 11,... Are formed at appropriate intervals in the vehicle width direction of the headlining 1. It is.

  Of course, the plurality of beads 11, 11,... Are provided as a set on both sides of the head lining 1 in the vehicle width direction.

  Therefore, according to the second embodiment, since a plurality of beads 11, 11..., Which are high-density regions, are formed, the strength can be increased at the formation portion of each bead 11, 11. The bending rigidity of the lining 1 in the vehicle front-rear direction can be further increased.

  FIG. 9 shows a third embodiment of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. It is sectional drawing.

  In the headlining structure of the third embodiment, as shown in FIG. 9, a plurality of beads 11 (two in this embodiment) are formed in the vehicle width direction, and the vehicle width is close to the curtain airbag 7. A hinge point P is set on the outer bead 11A located on the outer side in the direction.

  When a plurality of beads 11 are thus formed, the groove depth d of the outer bead 11A where the hinge point P is set is formed deeper than the other inner beads 11B.

  Therefore, according to the third embodiment, even when a plurality of beads 11 are formed, a specific bead, that is, in this embodiment, the outer bead 11A is reliably set as the hinge point P, and the head when the curtain airbag 7 is deployed. The side portion 11d of the lining 1 can be bent smoothly.

  FIG. 10 shows a fourth embodiment of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. It is sectional drawing.

  In the headlining structure of the fourth embodiment, as shown in FIG. 10, a plurality of beads 11 (two in this embodiment) are formed in the vehicle width direction, and the outer beads positioned on the outer side in the vehicle width direction. 11A is recessed in a groove shape on the upper surface side of the head lining 1, and a hinge point P is set.

  On the other hand, the other inner bead 11 </ b> B is formed on the upper surface of the headlining 1 so as to protrude upward.

  Therefore, according to the fourth embodiment, even when a plurality of beads 11 are formed, a specific bead, that is, in this embodiment, the outer bead 11A can be reliably set as the hinge point P and protrudes upward. The bending rigidity of the head lining 1 in the vehicle front-rear direction can be further increased by the inner bead 11B.

  FIG. 11 shows a fifth embodiment of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted, and FIG. 11 is a plan view of the headlining. .

  In the headlining structure of the fifth embodiment, as shown in FIG. 11, beads 11, which are high-density regions formed in a strip shape along the vehicle front-rear direction, are divided and formed at intervals S1, S2 in the vehicle front-rear direction. is there.

  Therefore, according to the fifth embodiment, by dividing the bead 11, the same effect as the first to fourth embodiments can be obtained, and the strength embodied by the bead 11 can be controlled. Therefore, the bending rigidity in the vertical direction of the side portion 1d of the headlining 1 can be adjusted.

  The vehicle headlining structure of the present invention has been described by taking the first to fifth embodiments as examples. However, the present invention is not limited to these embodiments, and various other embodiments can be used without departing from the scope of the present invention. For example, the present invention can be applied even when the curtain airbag 7 is not used, and in this case, a high-density region can be provided at the center of the headlining 1 in the vehicle width direction.

It is a perspective view of the headlining in a 1st embodiment of the present invention. It is a top view of head lining in a 1st embodiment of the present invention. It is a principal part expanded sectional view along the AA line in FIG. It is principal part sectional drawing which shows schematically the molding state of the headlining in 1st Embodiment of this invention. It is a perspective view which shows the principal part of the bead formation part of the headlining in 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the bead in 1st Embodiment of this invention with the perspective view of (a), the BB sectional view of (b), and the CC sectional view of (c). It is explanatory drawing which shows the angle limitation of the groove shape of the bead in 1st Embodiment of this invention. It is sectional drawing of the one side edge part of the headlining in 2nd Embodiment of this invention. It is sectional drawing of the one side edge part of the headlining in 3rd Embodiment of this invention. It is sectional drawing of the one side edge part of the headlining in 4th Embodiment of this invention. It is a top view of the headlining in a 5th embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Headlining 1d The vehicle width direction side part of a headlining 7 Curtain airbag 10 High-density area | region 11 Bead 11A Outer bead 11B Inner bead P Hinge point

Claims (8)

  A vehicle headlining structure, wherein a belt-like high-density region is formed along a longitudinal direction of a vehicle at the time of molding on a synthetic resin headlining lined on a vehicle ceiling.   The vehicle headlining structure according to claim 1, wherein the high-density region is a bead that is press-molded when the headlining is molded.   3. The headlining structure for a vehicle according to claim 2, wherein the bead is positioned above a lower edge of a curtain airbag attached to the roof side rail portion.   4. The vehicle headlining structure according to claim 3, wherein the bead is formed in a groove shape, and the groove shape is regulated so that one groove corner portion becomes a hinge point when the curtain airbag is deployed.   The vehicle headlining structure according to claim 3 or 4, wherein a plurality of beads are formed at an appropriate interval in the vehicle width direction of the headlining.   6. The headlining structure for a vehicle according to claim 5, wherein the plurality of beads formed have a groove depth deeper than that of a hinge point.   A plurality of beads are provided at appropriate intervals in the vehicle width direction of the head lining, the bead that is close to the curtain airbag is recessed on the upper surface side of the head lining, and the other is protruded upward. The vehicle headlining structure according to claim 3 or 4,   The vehicle headlining structure according to any one of claims 1 to 7, wherein the high-density region is divided and formed in a vehicle front-rear direction.

Images