JP2018103698A - Cowl top cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain a reaction force from becoming higher as a deformation volume of a cowl top cover is larger.SOLUTION: A cowl top cover 1 includes: a shield part 9 covering a clearance between a windshield 3 and a hood 7; a vertical wall part 13 provided at the front part of the shield part 9 and provided between the hood 7 and a vehicle body panel 11 below the hood 7. The vertical wall part 13 includes a vertical wall upper part 13a on the hood 7 side, a vertical wall lower part 13b on the vehicle body panel 11 side and a step-off part 13c extending in the cross direction after joining the vertical wall upper part 13a to the vertical wall lower part 13b. A surface side rib 21 is provided on the front side of the vertical wall upper part 13a and a rear side rib 23 is provided on the rear side of the vertical wall lower part 13b, respectively. When a load is applied toward the vehicle body panel 11 side via the vertical wall part 13 from the hood 7 side, the surface side rib 21 makes a stress concentrate on the step-off part 13c to destroy it and separates the vertical wall upper part 13a and the vertical wall lower part 13b from each other.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cowl top cover provided between a front window shield panel and a hood.

  Conventionally, Patent Document 1 discloses that when a pedestrian collides with the rear end of a hood at the front of a vehicle and a load is applied to the cowl top cover, the cowl top cover is deformed to absorb an impact. Yes.

Japanese Patent Laying-Open No. 2005-306086

  Such a cowl top cover needs to suppress the reaction force from increasing as the amount of deformation increases.

  Therefore, an object of the present invention is to suppress the reaction force from increasing as the amount of deformation increases.

  The present invention is a cowl top cover provided between a front window shield panel and a hood positioned in front of the front window shield panel, wherein the cowl top cover includes the hood and a vehicle body member below the hood. The vertical wall portion includes a vertical wall upper portion on the hood side, a vertical wall lower portion on the vehicle body member side, a lower end on the vertical wall upper portion, and an upper end on the lower vertical wall portion. And a load applying portion for concentrating a load from above and causing the load to split.

  According to the present invention, when a load is input from the hood to the vertical wall portion of the cowl top cover, the load applying portion presses and splits the step portion, and the vertical wall upper portion and the vertical wall lower portion By being divided, it is possible to suppress an increase in reaction force and to absorb an impact load more efficiently.

It is a perspective view of a cowl top cover concerning a 1st embodiment of the present invention. It is a front view which shows a part of cowl top cover of FIG. It is the figure which added other members, such as a windshield and a food | hood, to the AA sectional drawing of FIG. It is the perspective view which looked at the cowl top cover of FIG. 1 from the back side. It is a perspective view which shows the state which cleaved the level | step-difference part of the cowl top cover of FIG. 1 as an enlarged view of the B section of FIG. It is sectional drawing which shows the state by which the level | step-difference part was destroyed after the cleavage of FIG. 5, and the vertical wall upper part and the vertical wall lower part were parted. It is a front view which shows a part of cowl top cover concerning the 2nd Embodiment of this invention. It is a front view which shows a part of cowl top cover concerning the 3rd Embodiment of this invention.

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

  A cowl top cover 1 according to the first embodiment of the present invention shown in FIG. 1 includes a windshield 3 as a front windshield panel of an automobile and a hood 7 that covers an upper opening of an engine room 5 as shown in FIG. Between them. The hood 7 includes an outer panel 7a and an inner panel 7b. The cowl top cover 1 is formed long in the vehicle width direction, and the vehicle width direction length is substantially equal to the vehicle width direction length of the hood 7. Note that the direction indicated by FR in the figure is the front of the vehicle, the direction indicated by the arrow UP is the upper side of the vehicle, and in the following description, simply “front” or “rear” means the front-rear direction of the vehicle. .

  The cowl top cover 1 includes a shielding portion 9 that covers a gap between the windshield 3 and the hood 7, and a vertical wall portion 13 that is positioned between the inner panel 7 b of the hood 7 and the vehicle body panel 11 as a vehicle body member. I have. The cowl top cover 1 including the shielding part 9 and the vertical wall part 13 is integrally formed of a synthetic resin such as polypropylene, for example.

  The shielding portion 9 includes a fitting portion 9a to which the front end 3a of the windshield 3 is fitted and fixed, a rear inclined portion 9b connected to the fitting portion 9a, a front inclined portion 9c located below the hood 7, and a rear inclined portion. An intermediate inclined portion 9d that connects the portion 9b and the front inclined portion 9c is provided. The rear inclined part 9b extends substantially parallel to the windshield 3 from the fitting part 9a toward the front obliquely downward direction. The intermediate inclined portion 9d extends obliquely upward and forward from the front end of the rear inclined portion 9b. The forward inclined portion 9c extends obliquely downward and forward from the front end of the intermediate inclined portion 9d.

  Below the hood 7, a seal material support portion 15 as a load receiving surface is formed to project forward from the front end of the front inclined portion 9 c in a substantially horizontal state. A hood seal material 17 is fixed on the seal material support 15 by adhesion. The hood sealing material 17 is elastically deformed when the inner panel 7 b comes into contact with the hood 7 being closed, and seals between the hood 7 and the cowl top cover 1.

  The upper end of the vertical wall portion 13 is connected to the connection portion between the front inclined portion 9 c and the seal material support portion 15. A vehicle body attachment portion 19 that protrudes forward from the lower end of the vertical wall portion 13 is formed. The vehicle body attachment portion 19 is formed substantially horizontally and is fixed to the horizontal portion 11a of the vehicle body panel 11 using, for example, a clip (not shown). The vertical wall portion 13 is located on the hood 7 side and is connected to the front inclined portion 9c and the seal material support portion 15. The vertical wall upper portion 13a is connected to the vehicle body panel 11 side and is connected to the vehicle body mounting portion 19. It has.

  As shown in FIG. 3, the vertical wall upper portion 13a is formed along a substantially vertical direction. On the other hand, the vertical wall lower portion 13b is inclined with respect to the vertical direction so that the upper portion is on the vehicle front side with respect to the lower portion, and the upper end portion is positioned on the vehicle front side with respect to the lower end portion of the vertical wall upper portion 13a. The lower end portion of the vertical wall upper portion 13a and the upper end portion of the vertical wall lower portion 13b are connected by a step portion 13c. The step part 13c is formed substantially horizontally and is thinner than the vertical wall upper part 13a and the vertical wall lower part 13b. The vertical wall upper portion 13a and the vertical wall lower portion 13b have the same plate thickness as other portions such as the shielding portion 9.

  As shown in FIG. 2, a front side rib 21 as a V-shaped first rib is provided on the front side of the vertical wall upper portion 13a as viewed from the front and rear direction of the vehicle. The inclined ribs 21a and 21b. The pair of inclined ribs 21a and 21b are V-shaped with their lower ends connected to each other and their upper ends spaced apart from each other along the vehicle width direction. The lower end 21v of the V-shaped surface-side rib 21 is located behind the upper end of the vertical wall lower portion 13b, as shown in FIG. 3, in contact with the upper surface of the stepped portion 13c.

  As shown in FIG. 3, the pair of inclined ribs 21 a and 21 b has a substantially right triangle shape in a side view. The rear side portion 21r on the vehicle rear side of each of the inclined ribs 21a and 21b having a right triangle shape is connected to the front side of the vertical wall upper portion 13a, and the upper side portion 21u on the right triangle shape hood 7 side is connected to the seal material support portion 15. . The front end of the upper side portion 21u and the lower end of the rear side portion 21r are connected by the oblique side portion 21h via the lower side portion 21w. The lower side portion 21w corresponds to the lower end 21v of the surface-side rib 21, and extends in the front-rear direction on the upper surface of the step portion 13c. As shown in FIG. 1, a plurality of such surface side ribs 21 are provided at equal intervals along the longitudinal direction.

  The front surface side rib 21 is provided between the lower surface of the sealing material support portion 15 and the upper surface of the step portion 13c. In this case, the surface side rib 21 includes a configuration provided between the front surface of the vertical wall upper portion 13a and the lower surface of the seal material support portion 15, and is provided between the front surface of the vertical wall upper portion 13a and the upper surface of the step portion 13c. Configuration.

  On the rear side of the vertical wall lower portion 13b, as shown in FIG. 3, a back surface side rib 23 is provided as a second rib having a triangular shape in a side view. The back surface side rib 23 is provided between the upper rear surface of the vertical wall lower portion 13b and the lower surface of the step portion 13c. As shown in FIG. 2, a pair of such rear surface side ribs 23 is provided at positions corresponding to the vicinity of both sides in the vehicle width direction of the lower end 21 v of the front surface side rib 21. The front side rib 21 and the back side rib 23 constitute a load applying portion.

  As shown in FIG. 3, triangular reinforcing ribs 25 are provided on the front lower portion of the vertical wall lower portion 13 b in a side view. The reinforcing rib 25 is provided between the lower front surface of the vertical wall lower portion 13 b and the upper surface of the vehicle body mounting portion 19. As shown in FIG. 1, the reinforcing ribs 25 are provided at positions corresponding to each other between the surface side ribs 21 provided in a plurality along the vehicle width direction.

  On the front surface of the vertical wall lower portion 13b near the upper end of the reinforcing rib 25, a groove 13b1 is formed as a fragile portion. As shown in FIG. 2, the groove 13b1 extends over the entire length of the cowl top cover 1 along the vehicle width direction, and is positioned at a substantially vertical center of the vertical wall lower portion 13b. Therefore, the reinforcing rib 25 and the back surface side rib 23 located in the lower part of the groove 13b1 are separated in the vertical direction.

  Next, it is assumed that a vehicle including the cowl top cover 1 having the above-described structure collides with the rear end of the hood 7 due to, for example, a collision. In this case, as shown in FIG. 3, a downward impact load F is applied to the hood 7, and the impact load F is transmitted to the cowl top cover 1 via the hood seal material 17. The cowl top cover 1 receives an impact load F with the vertical wall portion 13 and the plurality of front surface side ribs 21 via the seal material support portion 15.

  The plurality of surface side ribs 21 transmit the impact load F received by the upper side portion 21u to the step portion 13c by the lower end 21v. At this time, stress is concentrated on the lower end 21v while the step 13c is supported by the pair of backside ribs 23. As a result, as shown in FIG. 5, the lower end 21v is pierced into the stepped portion 13c so that a crack is generated and opened. The stepped portion 13c starts to break from the cracked portions P generated at a plurality of locations in the vehicle width direction, and as shown in FIG. 6, the vertical wall portion 13 is formed at the top of the vertical wall with the broken stepped portion 13c as a boundary. It is divided into 13a and a vertical wall lower part 13b.

  At this time, as shown in FIG. 3, the vertical wall lower portion 13b is inclined so that the upper portion is positioned forward of the lower portion, and is bent forward with the groove 13b1 as a fulcrum. When the vertical wall lower portion 13b is bent forward, the reinforcing rib 25 is provided in the vicinity of the lower portion of the groove 13b1, so that the bending deformation of the vertical wall lower portion 13b becomes more reliable. When the vertical wall lower portion 13b is bent forward, as shown in FIG. 6, the oblique side portion 21h of the surface side rib 21 moves downward while contacting the bent portion corresponding to the groove 13b1 of the vertical wall lower portion 13b. .

  As described above, in the present embodiment, when the impact load F is input from the hood 7 to the vertical wall portion 13 of the cowl top cover 1, the surface side rib 21 presses and breaks the step portion 13c, and the step portion 13c is formed. The vertical wall upper part 13a and the vertical wall lower part 13b are divided by the boundary. Thereby, it can suppress that the reaction force when the impact load F is input becomes high as the deformation amount of the cowl top cover 1 increases, and the impact load F can be absorbed more efficiently.

  In the present embodiment, the load applying portion includes a surface side rib 21 provided in at least a part between one of the vertical wall upper portion 13a and the vertical wall lower portion 13b and the stepped portion 13c, and the vertical wall upper portion 13a and the vertical wall upper portion 13a. A back-side rib 23 provided at least at a part between the other of the wall lower portion 13b and the stepped portion 13c.

  In this case, when an impact load F is input from the hood 7 to the vertical wall portion 13 of the cowl top cover 1, the stepped portion 13 c is supported by the rear surface side rib 23 and stress concentration is caused by the front surface side rib 21. Receive more reliably. Thereby, the level | step-difference part 13c is pressed by the surface side rib 21, is easily cleaved and destroyed, and can suppress more reliably the reaction force when the impact load F inputs.

  In the present embodiment, the front surface side rib 21 and the back surface side rib 23 are provided apart from each other along the vehicle width direction. In this case, when the front-side rib 21 applies a load to the stepped portion 13c, the back-side rib 23 supports the stepped portion 13c at a position separated from the front-side rib 21 along the vehicle width direction. As a result, the stepped portion 13c can be more reliably cleaved.

  In the present embodiment, the lower end of the vertical wall upper portion 13a is located behind the upper end of the vertical wall lower portion 13b, and the surface-side rib 21 is provided at least at a part between the front of the vertical wall upper portion 13a and the step portion 13c. The back surface side rib 23 is provided at least at a part between the rear of the vertical wall lower portion 13b and the step portion 13c. In this case, the surface side rib 21 located in front of the vertical wall upper portion 13a can more reliably transmit the impact load F received by the hood 7 to the stepped portion 13c.

  In the present embodiment, a plurality of front surface side ribs 21 and rear surface side ribs 23 are provided along the vehicle width direction, and the sealing material support portion 15 extending along the vehicle width direction is provided on the upper surface of the plurality of front surface side ribs 21. Is provided. In this case, the stepped portion 13c can be easily destroyed over the entire length in the vehicle width direction by transmitting the impact load F received by the hood 7 from the sealing material support portion 15 to the plurality of surface side ribs 21. By providing a plurality of front surface side ribs 21 and back surface side ribs 23, the stepped portion 13 c can be destroyed even if an impact load F acts on different positions of the hood 7 in the vehicle width direction.

  In the present embodiment, the front-side rib 21 includes an upper side 21u that faces the sealant support part 15, a rear side 21r that is located at the rear end of the upper side 21u and is connected to the front surface of the vertical wall upper portion 13a, It has a hypotenuse part 21h connecting the front end of the part 21u and the lower end of the rear side part 21r, and has a substantially right triangle shape in a side view. In this case, the surface side rib 21 can transmit the impact load F received by the upper side part 21u to the step part 13c by the lower end 21v between the rear side part 21r and the oblique side part 21h, and can be split. When the vertical wall upper portion 13a and the vertical wall lower portion 13b are divided at the stepped portion 13c as a boundary, the oblique side portion 21h of the surface side rib 21 absorbs the impact by pushing the vertical wall lower portion 13b forward.

  In the present embodiment, the step portion 13c is formed thinner than the vertical wall upper portion 13a and the vertical wall lower portion 13b. For this reason, the stepped portion 13c is easily cleaved when subjected to stress concentration by the surface side rib 21, and the vertical wall upper portion 13a and the vertical wall lower portion 13b are easily divided at the stepped portion 13c as a boundary. The reduction effect is further increased, and the impact absorption efficiency is further increased.

  A cowl top cover 1A of the second embodiment shown in FIG. 7 is provided with a single plate-like surface side rib 21A instead of the V-shaped surface side rib 21 shown in FIG. Other configurations are the same as those of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals.

  21 A of surface side ribs of 2nd Embodiment are extended in the up-down direction between the sealing material support part 15 and the level | step-difference part 13c, and are V-shaped surface side rib 21 shown in FIG. Similarly, it has a substantially right triangle shape. That is, the front side rib 21A has a rear side (not shown) on the rear side (the back side in FIG. 7) connected to the front side of the vertical wall upper part 13a, and the upper side 21Au on the right triangle-shaped hood 7 side is a sealing material support part. 15 is connected. The front end of the upper side portion 21Au and the lower end of the rear side portion are connected by the oblique side portion 21Ah via the lower side portion 21Aw corresponding to the lower end 21Av of the surface side rib 21A.

  Like the surface side rib 21 of the first embodiment, a plurality of such surface side ribs 21A are provided at equal intervals along the longitudinal direction, and the back surface is located at positions corresponding to both sides in the vehicle width direction of the surface side rib 21A. Side ribs 23 are located.

  Also in the second embodiment, when an impact load F is input from the hood 7 to the vertical wall portion 13 of the cowl top cover 1, the surface-side rib 21A causes the stress to concentrate on the step portion 13c and cause the step 13c to split. The vertical wall upper portion 13a and the vertical wall lower portion 13b are separated from each other. Thereby, it can suppress that the reaction force when the impact load F inputs is high, and can absorb the impact load F more efficiently.

  In the second embodiment, since the surface-side rib 21A is configured as a single plate, the structure is simplified and the weight can be reduced as compared with the V-shaped surface-side rib 21.

  A cowl top cover 1B of the third embodiment shown in FIG. 8 is provided with a front-side rib 21B and a rear-side rib 23B that replace the V-shaped front-side rib 21 and the rear-side rib 23 shown in FIG. The surface-side rib 21B includes two plate-like parallel ribs 21Ba and 21Bb that are parallel to each other and spaced apart from each other along the vehicle width direction. The parallel ribs 21Ba and 21Bb have a substantially right triangle shape in a side view as in the case of the surface side rib 21A of the second embodiment shown in FIG.

  The back surface side rib 23B is provided in a position corresponding to the space between the pair of front surface side ribs 21B, and one triangular shape in a side view similar to the back surface side rib 23 of the first embodiment. Other configurations are the same as those of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals.

  In the third embodiment, when the impact load F is input from the hood 7 to the vertical wall portion 13 of the cowl top cover 1, the two parallel ribs 21Ba and 21Bb of the surface side rib 21B receive the impact load, and the step portion Press 13c downward. At this time, one back surface side rib 23B resists the pressing force from the parallel ribs 21Ba and 21Bb between the parallel ribs 21Ba and 21Bb, and cleaves the step portion 13c.

  The step 13c is broken by the occurrence of such cleavage at portions corresponding to the front-side rib 21B and the rear-side rib 23B provided in the vehicle width direction, and the vertical wall portion 13 is Similar to the embodiment, it is divided into a vertical wall upper portion 13a and a vertical wall lower portion 13b. Thereby, it can suppress that the reaction force when the impact load F inputs is high.

  As mentioned above, although embodiment of this invention was described, these embodiment is only the illustration described in order to make an understanding of this invention easy, and this invention is not limited to the said embodiment. The technical scope of the present invention is not limited to the specific technical matters disclosed in the above embodiment, but includes various modifications, changes, alternative techniques, and the like that can be easily derived therefrom.

  For example, in the surface side rib 21 in the first embodiment, the upper side portion 21u may be all or partly separated from the sealing material support portion 15, and the lower end 21v may be entirely or partially separated from the step portion 13c. Some may be somewhat separated. Moreover, as for the surface side rib 21, the rear side part 21r may be spaced apart a little from the whole or a part with respect to the vertical wall upper part 13a. The same applies to the surface side ribs 21A and 21B of the second and third embodiments.

  The rear surface side rib 23 in the first embodiment has the upper end connected to the lower surface of the stepped portion 13c, but may be entirely or partially separated. The same applies to the rear surface side ribs 23 and 23B of the second and third embodiments.

  In the above-described embodiment, the stepped portion 13c is thinner than the vertical wall upper portion 13a and the vertical wall lower portion 13b, but may have a thickness equivalent to that of the vertical wall upper portion 13a and the vertical wall lower portion 13b. Further, the groove 13b1 of the vertical wall lower portion 13b may not be provided. In this case, the vertical wall lower portion 13b as shown in FIG. 6 is less likely to be bent and deformed, but it is possible to suppress the reaction force from being increased by dividing the vertical wall upper portion 13a and the vertical wall lower portion 13b. .

1 Cowl top cover 3 Windshield (front window shield panel)
7 Hood 11 Body panel (body member)
13 Vertical wall portion 13a Vertical wall upper portion 13b Vertical wall lower portion 13c Stepped portion 15 Seal material support portion (load receiving surface)
21, 21A, 21B Surface side rib (first rib, load applying portion)
21h, 21Ah Oblique side portion of surface side rib 21r Rear side portion of surface side rib 21u, 21Au Upper side portion of surface side rib 23, 23B Back side rib (second rib, load applying portion)

Claims (5)

A cowl top cover provided between the front window shield panel and a hood located in front of the front window shield panel,
The cowl top cover is
A vertical wall provided between the hood and a vehicle body member below the hood;
The vertical wall portion is
An upper vertical wall on the hood side;
A lower part of the vertical wall on the vehicle body member side;
A stepped portion extending in the front-rear direction connecting the lower end of the upper portion of the vertical wall and the upper end of the lower portion of the vertical wall;
A cowl top cover, comprising: a load applying portion for concentrating a load from above on the stepped portion and causing the load to split. The load applying portion is
A first rib provided on at least a part between either the vertical wall upper part or the vertical wall lower part and the step part;
The cowl top according to claim 1, further comprising: a second rib provided at least at a part between the other of the vertical wall upper part and the vertical wall lower part and the stepped part. cover.   The cowl top cover according to claim 2, wherein the first rib and the second rib are provided apart from each other along the vehicle width direction.   The lower end of the upper part of the vertical wall is located behind the upper end of the lower part of the vertical wall, and the first rib is provided at least at a part between the front part of the upper part of the vertical wall and the step part. 4. The cowl top cover according to claim 2, wherein the rib is provided at least at a part between a rear portion of the lower portion of the vertical wall and the stepped portion. 5. A plurality of the first ribs and the second ribs are provided along the vehicle width direction, and load receiving surfaces extending along the vehicle width direction are provided on the upper surfaces of the plurality of first ribs,
The first rib includes an upper side opposite to the load receiving surface, a rear side located at the rear end of the upper side and connected to the front surface of the upper portion of the vertical wall, and a lower end of the front end and the rear side of the upper side. A hypotenuse that connects to each other, and has a substantially right triangle shape in side view,
The cowl top cover according to claim 4, wherein the stepped portion is formed thinner than the upper part of the vertical wall and the lower part of the vertical wall.

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