JP5359104B2 - Automotive door trim structure - Google Patents

Description

  The present invention relates to the structure of a door trim that constitutes the inner surface of an automobile door, and belongs to the technical field of automobile interiors.

  Generally, an armrest on which an occupant's arm is placed protrudes toward the interior of the vehicle interior of a door trim that constitutes the inner surface of an automobile door. There is a risk of receiving an impact from the armrest, and for example, there is a structure disclosed in Patent Document 1 as a structure for absorbing the impact.

  That is, in Patent Document 1, as shown in FIG. 10, a door trim 110 protrudes toward the inside of the vehicle interior and includes a door trim main body 111 (a door lining main body of Reference 1) having a shelf portion 111 a that forms the base of the armrest 110 a. The rear part of the shelf 111a of the door trim body 111 (left side in FIG. 10) when the periphery of the shelf 111a of the door trim body 111 is configured with a covering material 112 (center pad of Reference 1) that decorates the vehicle interior side. In addition, a relatively large punch hole 111b having a length that is about one third of the entire length of the shelf 111a is formed, and when the armrest 110a and the occupant come into contact with each other, deformation of the peripheral portion of the armrest 110a in the door trim 110 is caused. What is configured to be easy is disclosed. Patent Document 1 also discloses that a hole may be provided in the covering material 112.

  In Patent Document 2, as shown in FIG. 11, air that expands upward along a vehicle inner surface of a door trim 210 attached to the inner side of the door main body 202 on a sheet S ′ on the side of the door 201. A bag 220 is provided, and a base surface portion 210a of the door trim 210 is bulged in a stepped manner toward the vehicle interior to constitute an armrest 210b (shelf portion), and from the inner end in the vehicle width direction of the armrest 210b. A rod-like support portion 212 extending in the vehicle width direction for maintaining the shape of the armrest 210b is provided between the vertical surface portion 210c extending downward and the inner surface of the door body 202, and protrudes toward the vehicle interior. In order to prevent the armrest 210b from obstructing the upward deployment of the airbag 220, the armrest 210b has an air bag from below. When the deployment pressure of 220 is applied, the rod-like support portion 212 is broken by the deployment pressure of the airbag 220 as shown by the phantom line, and the armrest 210b is deformed outward in the vehicle width direction. It is disclosed.

Japanese Utility Model Publication No. 6-87018 JP 2003-220915 A

  By the way, in the thing of patent document 1, since the comparatively big punching hole 111b is formed in the door trim main body 111, the intensity | strength of the armrest 110a peripheral part of the door trim 110 falls, and the armrest 110a peripheral part of the normal time is reduced. It may be difficult to maintain the shape.

  Here, it is conceivable to apply a structure in which the armrest 210b (shelf) of the door trim 210 can be deformed by breaking the rod-like support portion 212 described in Patent Document 2 in an automobile that does not have the airbag 220. . In this case, when the occupant abuts against the door trim 210 due to a side collision or the like, an impact load from the vehicle width direction acts on the rod-like support portion 212, but the rod-like support portion 212 extends in the vehicle width direction. There is a possibility that the rod-like support portion 212 is stretched and cannot sufficiently absorb the impact at the time of a side collision.

  Then, this invention makes it a subject to provide the door trim structure which can make compatible both the maintenance of the shape of the shelf part of the door trim in the normal time, and the impact absorption performance at the time of a side collision.

  In order to solve the above-described problems, the present invention is configured as follows.

First, the invention according to claim 1 of the present application is a door trim structure for an automobile having a shelf part that protrudes toward a passenger compartment in a seat trim side portion of the door trim and that forms an armrest. In the part, an opening that penetrates up and down is provided, and two bridging parts on the front side and the rear side that connect between the left and right edges of the opening in the vehicle width direction are provided with a gap in the front and rear , The front bridging portion is inclined with respect to the vehicle width direction so that the outer end portion in the vehicle width direction is located in front of the inner end portion in the vehicle width direction, and the outer end portion in the vehicle width direction is at the rear bridging portion. It is inclined with respect to the vehicle width direction so as to be located behind the inner end portion in the vehicle width direction, and the bridging portion on the front side and the rear side is connected to the bridge when an impact load is applied from the outside in the vehicle width direction. There is a fragile part that bends or breaks the part, and the front Wherein the covering material covering the opening on the upper surface of the shelf portion.

According to a second aspect of the present invention, in the automobile door trim structure according to the first aspect, the weak portions of the front and rear bridging portions are constituted by Z-shaped bent portions, and the bent portions The upper end of the substrate supports the covering material from below .

According to a third aspect of the present invention, in the automobile door trim structure according to the first or second aspect, the rear bridge portion is narrower than the front bridge portion. To do.

According to a fourth aspect of the present invention, in the automobile door trim structure according to any one of the first to third aspects of the present invention, the covering material is provided with an opening concave portion having an upper surface opened and recessed downward. The opening concave portion is formed so as to avoid the bridging portion, and the opening concave portion is separated from the edge of at least one vehicle width direction of the opening of the shelf by a predetermined amount, and the side wall portion is separated from the bridging portion. It is provided so that it may adjoin.

According to a fifth aspect of the present invention, in the automobile door trim structure according to any one of the first to fourth aspects of the present invention , the impact extends from the outside in the vehicle width direction to the covering material. A slit is formed to facilitate deformation of the covering material in the vehicle width direction when a load is input.

  Next, the effect of the present invention will be described.

  First, according to the first aspect of the present invention, an opening penetrating up and down is provided in a shelf portion that protrudes toward the passenger compartment in the seat trim side portion of the door trim. Thus, when the occupant comes into contact with the shelf and an impact load is input to the shelf from the vehicle width direction, the shelf can be deformed.

In that case, the front and rear bridging portions that connect the left and right edges of the opening in the vehicle width direction are provided with a space in the front and rear , and the front bridging portion has an outer end in the vehicle width direction. Inclined with respect to the vehicle width direction so as to be positioned in front of the inner end portion in the vehicle width direction, and the bridge portion on the rear side is positioned so that the outer end portion in the vehicle width direction is located behind the inner end portion in the vehicle width direction. Even if an opening is provided, the strength required to maintain the shape of the door trim shelf during normal operation is good at multiple points on the front and back due to multiple bridges with different inclination directions. Can be secured. Further, as described above, since each bridge portion is inclined with respect to the vehicle width direction, when an impact load is input to the shelf portion from the vehicle width direction, the bridge portion easily falls down. That is, it becomes difficult to stretch. Therefore, even if the bridging portion is provided, the shelf portion is easily crushed in the vehicle width direction at the time of the side collision, and the shock absorbing performance at the time of the side collision is sufficiently ensured.

According to the invention described in claim 1 , since the bridging portion is provided with a fragile portion that bends or breaks the bridging portion when an impact load is input from the vehicle width direction, the shape in a normal state is provided. While securing the strength required for maintenance, shock absorption during a side impact is likely to be performed.

In that case, according to invention of Claim 2, a Z-shaped bending part is provided in the bridging part of the front side and the rear side as the weak part, and the covering material is supported from below by the upper end. Therefore, downward bending of the covering material in a state where the occupant's arm is placed is prevented.

Further , according to the invention described in claim 3, since the rear bridge portion close to the occupant's trunk is made thinner than the front bridge portion, when the occupant's trunk abuts against the shelf, Will be deformed.

According to a fourth aspect of the present invention, the covering material covering the top surface of the shelf is formed with an opening recess that is open at the top and recessed downward, so that the opening recess is used as an accessory case. be able to.

  In addition, the opening recess is configured such that the side wall portion is separated by a predetermined amount from at least one edge in the vehicle width direction of the opening of the shelf and the side wall portion is close to the bridging portion. Therefore, when the left and right edges of the opening of the shelf approach each other due to an impact load from the vehicle width direction, the side wall portion and the bridge portion come into contact with each other, and the bridge portion at the time of a side collision Will be promoted. Therefore, shock absorption at the time of a side collision is performed reliably.

According to the invention described in claim 5 , the covering material covering the upper surface of the shelf extends in the front-rear direction, and when the impact load is input from the outside in the vehicle width direction, the covering material is deformed in the vehicle width direction. Since the slit which promotes is formed, the coating material itself is easily deformed. Therefore, the impact absorption performance at the time of a side collision is improved.

  Hereinafter, a door trim structure for an automobile according to an embodiment of the present invention will be described.

  As shown in FIGS. 1A and 1B, a front seat S is disposed on the side of a front door 1 of an automobile to which a door trim structure according to the present invention is applied. A door trim 10 is provided on the vehicle compartment side of the door body 2 of the front door 1. The door trim 10 is provided with an armrest 10a on the side of the occupant P seated on the front seat S, on which the arm of the occupant P is placed.

  As shown in FIG. 2, the door trim 10 includes a door trim main body 11 that covers the inner surface of the door main body 2, a covering material 12 that decorates an upper surface of an armrest 10 a that protrudes toward the vehicle interior, and an armrest 10 a An elastic member 13 for imparting elasticity to the upper surface and an assist grip 14 are provided.

  The door trim main body 11 is formed by injection-molding a thermoplastic resin using a mold, and has flexibility that allows bending deformation. Further, the lower side from the vicinity of the center height of the base surface portion 11a formed substantially parallel to the vehicle inner surface of the door body 1 is bulged (projected) in a step shape toward the interior of the vehicle interior, so that FIG. As shown together, a shelf portion 11b having a substantially lateral surface is formed between the lower end of the non-bulged portion 11a1 and the upper end of the bulged portion 11a2 in the base surface portion 11a. As shown in FIG. 2, a concave portion 11c for arranging a window glass opening / closing operation switch is provided on the front side of the shelf 11b, and the rear side of the shelf 11b (from the assist grip 14). (The rear side) constitutes the base of the armrest 10a.

  As shown in FIG. 4, a substantially rectangular opening 11d that penetrates up and down in the rear part side of the shelf part 11b (the rear part side of the assist grip 14), that is, the part that forms the base part of the armrest 10a and that is long in the front and rear direction. (In addition, it is divided into three front and back by the bridge parts 11h and 11i mentioned later).

  The covering material 12 is made of a relatively hard resin and has a shape covering the opening 11d of the shelf portion 11b as shown in FIGS. 3 and 5, and on the back surface of the base surface portion 12a, A plurality of engaging claws 12c... 12c that extend and engage with an edge 11e on the outer side in the vehicle width direction of the opening 11d, and are formed below the edge 11f on the inner side in the vehicle width direction of the opening 11d. A plurality of fixed claw portions 12d, 12d fixed to the boss portion 11g with screws N are provided.

  Further, in the state where the covering material 12 is fixed to the shelf portion 11b of the door trim body 11, the height of the upper surface is slightly higher on the outer side in the vehicle width direction than on the inner side in the vehicle width direction. This is due to design reasons, for example.

  The elastic material 13 is made of, for example, a sponge-like cushion material having flexibility, and is fixed to the upper surface of the covering material 12.

  The assist grip 14 is made of a relatively hard resin, and as can be seen from FIGS. 1 and 2, the assist grip 14 is tilted forward between the front side of the armrest 10 a and the vicinity of the upper end of the base surface portion 11 a of the door trim body 11. After the door trim main body 11, the covering material 12, and the elastic material 13 are combined, the upper end portion is screwed to the vicinity of the upper end portion of the base surface portion 11a of the door trim main body 11, and the lower end portion is covered with the covering material 12 and The door trim body 11 is screwed through screw holes 12b and 11c (see FIGS. 3 and 4) formed in the shelf 11b of the door trim main body 11.

Here, as shown in FIG. 4 , on the front side and the rear side of the opening 11d of the shelf 11b, rod-shaped bridging portions 11h, 11i that connect the left and right edges 11e, 11f of the opening 11d in the vehicle width direction. However, it is provided at intervals in the front and rear. The bridging portions 11h and 11i are provided for maintaining the shape of the shelf portion 11b in which the opening 11d as described above is formed.

  In this case, the front-side bridge portion 11h is inclined with respect to the vehicle width direction so that the outer end portion in the vehicle width direction is positioned forward of the inner end portion in the vehicle width direction, and the bridge portion 11i on the rear side is The width direction outer end portion is inclined with respect to the vehicle width direction such that the width direction outer end portion is located behind the vehicle width direction inner end portion.

As shown in FIGS . 4 and 6, the bridge portions 11h and 11i are each provided with a Z-shaped bent portion 11j that is bent in a Z-shape in the vertical direction in the vicinity of the middle in the vehicle width direction. When an impact load in the vehicle width direction is input from the base surface portion 11a to the bridging portions 11h and 11i, the Z-shaped bent portion 11j is connected to the upper bent portion 11j1 and the lower side of the Z-shaped bent portion 11j. Stress concentration is caused in each of the bent portions 11j2, and the bridging portions 11h and 11i are bent upward or downward according to the magnitude relationship of the stress concentration between these bent portions 11j2. The Z-shaped bent portion 11j constitutes a fragile portion in claim 1 .

  Further, the rear bridge portion 11i is thinner than the front bridge portion 11h, that is, the cross-sectional area is reduced. This is because the trunk of the occupant P is closer to the bridge portion 11i on the rear side, so that the trunk of the occupant P can be deformed more quickly than the bridge portion 11h on the front side when the trunk of the occupant P comes into contact with the shelf portion 11b. It is an object.

  Note that the upper end 11jt of the Z-shaped bent portion 11j of the bridging portions 11h and 11i is in contact with the bottom surface of the covering material 12 to support the covering material 12 from below, whereby the arm of the passenger P is placed. The downward bending of the covering material 12 in the placed state is prevented.

  As can be seen from FIG. 4, the front side of the front bridging part 11h and the rear side of the rear bridging part 11i in the edge part 11 of the opening 11d in the vehicle width direction, and the edge part of the opening 11d on the outer side in the vehicle width direction. Cutouts 11k... 11k are formed on the rear side of the front bridging portion 11h and the front side of the rear bridging portion 11i in 11e, respectively.

  Further, as shown in FIGS. 5 and 6, the covering material 12 is formed with a plurality of slits 12e... 12e extending intermittently back and forth linearly in the vicinity of the middle in the vehicle width direction. . Here, the strength of the covering material 12 in which the slits 12e... 12e are formed in this way is not deformed only by placing the arm by the occupant P, but when the impact load is input from the vehicle width direction, the slit 12e. 12e... Is set to be folded at the position 12e and folded in the vehicle width direction.

  Next, the operation and effect of the present embodiment will be described.

  First, since an opening 11d penetrating vertically is provided in a shelf portion 11b that protrudes toward the vehicle interior at a side portion of the door trim 10 where the occupant P is seated, the occupant is moved to the shelf portion 11b by a side collision or the like. When an impact load is input to the shelf 11b from the vehicle width direction in contact with the shelf 11b, the shelf 11b can be deformed.

  In that case, the bridging portions 11h and 11i that connect the left and right edge portions 11e and 11f in the vehicle width direction of the opening 11d are provided with a space in the front-rear direction, and the front bridging portion 11h is located outside the vehicle width direction. The rear bridge portion 11i is inclined with respect to the vehicle width direction so that the end portion is located in front of the vehicle width direction inner end portion, and the vehicle width direction outer end portion is rearward of the vehicle width direction inner end portion. Since it is inclined with respect to the vehicle width direction so as to be located at two, the two bridging portions having different strengths for maintaining the shape of the shelf portion 11b of the door trim 11 in the normal state even when the opening 11d is provided With 11h and 11i, the front and rear can be secured well. Further, as described above, the bridging portions 11h and 11i are inclined with respect to the vehicle width direction. Therefore, when an impact load is input to the shelf portion 11b from the vehicle width direction, the bridging portions 11h and 11i are as shown in FIG. As shown by the imaginary line, it will fall down while bending back and forth. That is, the bridging portions 11h and 11i are not easily stretched. Therefore, even if the bridging portions 11h and 11i are provided, the shelf portion 11b is easily crushed in the vehicle width direction at the time of a side collision, and the shock absorbing performance at the time of the side collision is sufficiently ensured. Thus, according to the present embodiment, it is possible to maintain both the shape maintenance of the shelf portion 11b of the door trim 11 at the normal time and the shock absorbing performance at the time of a side collision with the smallest possible number of bridge portions 11h and 11i. it can.

  Further, since the bridging portions 11h and 11i are respectively provided with Z-shaped bent portions 11j, when an impact load is input from the vehicle width direction as indicated by α in FIG. Stress concentration occurs in the upper bent portion 11j1 and the lower bent portion 11j2 of the bent portions 11j and 11j, and the bridging portions 11h and 11i bend in the vertical direction as indicated by arrows β and imaginary lines. Therefore, it is possible to better absorb the impact at the time of side collision while ensuring the strength necessary for maintaining the shape at the normal time. Note that whether to bend in the upper or lower direction is determined depending on whether a large stress concentration occurs in the upper bent portion 11j1 or the lower bent portion 11j2 depending on the input direction of the impact load.

  Moreover, since slits 12e... 12e extending in the front-rear direction are formed in the covering material 12 covering the upper surface of the shelf portion 11b, when an impact load is input from the vehicle width direction, an arrow γ and an imaginary line are shown in FIG. As shown, the covering material 12 is bent at the slits 12e... 12e and the deformation in the vehicle width direction is promoted. Therefore, even when the relatively hard coating material 12 is provided, it is possible to sufficiently ensure the impact absorbing performance at the time of a side collision.

  In addition, since the armrest 10a is provided in most automobiles, the above-described actions and effects can be obtained in most automobiles.

  Next, a second embodiment will be described. Note that the description of the same components as those in the first embodiment is omitted, but in the description, the same reference numerals are used when the same components need to be cited.

  As shown in FIGS. 7 to 9, in the door trim 10 ′ according to the second embodiment, the base surface portion 12 a of the covering material 12 ′ has an opening recess 12 m that is open on the upper surface and recessed downward, and the door trim body 11. The front and rear bridge portions 11h and 11i are provided to avoid these. Further, the opening recess 12m has a corner portion 12n whose inner side wall portion 12q in the vehicle width direction is separated from the edge portion 11f of the opening 11d of the shelf portion 11b by a predetermined amount and is continuous with the side wall portion 12q. Is provided so as to be close to the bridging portion 11h on the front side. When the left and right edges 11e and 11f of the opening 11d of the shelf 11b approach each other due to an impact load from the vehicle width direction, the corner portion 12n and the bridging portion 11h on the front side come into contact with each other. It has become. The slits 12e ... 12 are provided before and after the opening recess 12m.

  The elastic member 13 'is provided with an opening 13a having substantially the same shape as the opening of the opening recess 12m above the opening recess 12m.

  According to the second embodiment, the covering material 12 'covering the upper surface of the shelf 11b is formed with the opening recess 12m having an upper surface opened and recessed downward, and the elastic material 13' has an opening recess. Since the opening 13a is provided above 12m, the opening recess 12m can be used as an accessory case.

In addition, the opening recess 12m has a bridging portion 11h between the corner portion 12n and the front side when the left and right edge portions 11e, 11f of the opening 11d of the shelf portion 11b approach each other due to an impact load from the vehicle width direction. Are brought into contact with each other, so that bending deformation of the bridging portion 11h at the time of a side collision is promoted as shown by a virtual line in FIG . Therefore, shock absorption at the time of a side collision is performed reliably.

In each of the above embodiments, the brittle portion of the bridging portion is constituted by a Z-shaped bent portion, but a notch may be formed near the middle of the bridging portion in the vehicle width direction, for example. Then, by adjusting the depth and shape of the notch, the bridging portion can be bent or broken when an impact load is input from the vehicle width direction.

  Further, in each of the above embodiments, the door trim structure according to the present invention is applied to the door trim for the front door, but the present invention can also be applied to the door trim for the rear door.

  In each of the above embodiments, the shelf is formed by expanding the door trim main body toward the interior of the vehicle interior. For example, the door trim main body is not expanded and the separate plate-like vehicle The present invention can also be applied to a shelf configured to protrude toward the vehicle interior by fixing the outer end in the width direction to the door trim body.

  ADVANTAGE OF THE INVENTION According to this invention, the door trim structure which can make compatible both the shape maintenance and strength ensuring of the door trim at the time of normal time, and the impact-absorbing performance at the time of a side collision can be provided, and it can utilize widely in the automobile industry.

The figure to which the door to which the door trim structure of the car concerning the 1st embodiment of the present invention was applied, and the figure which looked at the seat from the cabin (a figure), and the figure which looked at the door and the seat from back (b figure) is there. It is a single perspective view of the door trim from the diagonally rear side in the vehicle interior. It is A arrow directional view of FIG. It is a figure equivalent to FIG. 3 in the state which removed the coating | covering material and the cushioning material. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. FIG. 4 is a diagram corresponding to FIG. 3 for a second embodiment of the present invention. FIG. 8 is a view corresponding to FIG. 7 in a state where a covering material and a cushion material are removed. It is DD sectional drawing of FIG. It is explanatory drawing of background art (the 1). It is explanatory drawing of background art (the 2).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front door 10, 10 'Door trim 10a Armrest 11 Door trim main body 11b Shelf part 11d Opening 11h Bridge part (Bridge part of some bridge parts, front side bridge part)
11i bridging part (remaining bridging part among multiple bridging parts, rear bridging part)
11j Z-shaped bent part (fragile part)
12, 12 'Coating material 12e Slit 12m Opening recess 12q Side wall S Front sheet

Claims (5)

A door trim structure of an automobile having a shelf part that protrudes toward the passenger compartment in a seat trim side portion of the door trim and that constitutes an armrest ,
The shelf is provided with an opening penetrating vertically,
Two bridging portions on the front side and the rear side that connect the left and right edges of the opening in the vehicle width direction are provided with a gap in the front and rear direction .
The front bridging portion is inclined with respect to the vehicle width direction so that the outer end portion in the vehicle width direction is located in front of the inner end portion in the vehicle width direction, and the outer end portion in the vehicle width direction is at the rear bridging portion. Inclined with respect to the vehicle width direction so as to be located behind the inner end in the vehicle width direction ,
The bridging portion on the front side and the rear side is provided with a fragile portion that bends or breaks the bridging portion when an impact load is input from the outside in the vehicle width direction, and
A door trim structure for an automobile , wherein a covering material for covering the opening is provided on an upper surface of the shelf . The automobile door trim structure according to claim 1,
An automobile door trim structure characterized in that a weak portion of the front and rear bridging portions is formed by a Z-shaped bent portion, and an upper end of the bent portion supports the covering material from below . In the door trim structure of the automobile according to claim 1 or 2,
The door trim structure for an automobile, wherein the rear bridge portion is thinner than the front bridge portion . The automobile door trim structure according to any one of claims 1 to 3,
In the covering material, an upper surface is opened and an opening recess recessed downward is formed avoiding the bridging portion,
The opening concave portion is provided such that a side wall portion is separated by a predetermined amount from at least one edge in the vehicle width direction of the opening of the shelf portion, and the side wall portion is close to the bridging portion. Automobile door trim structure. The automobile door trim structure according to any one of claims 1 to 4, wherein:
A door trim structure for an automobile , wherein a slit is formed in the covering material so as to extend forward and backward and promote deformation of the covering material in the vehicle width direction when an impact load is applied from the outside in the vehicle width direction .

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