JP2015093639A - Hood structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a pedestrian protection performance in the event that a pedestrian collides with an oblique front of a vehicle, while ensuring durability with respect to impact when a hood is closed.SOLUTION: An edge of a hood inner panel 21 has a first inward fold line 43 and a first upward fold line 41 located inside the first inward fold line 43 are formed over a front part 21f so as to extend along the outer shape of the hood inner panel 21 and pass through the obliquely front curved part 23 of the vehicle from a side part 21s. The curved part 23 has a second upward fold line 45 and a second downward fold line 47, which form a shelf part 49 between the first downward fold line 43 and first upward fold line 41, so as to extend along the first upward fold lines 41 and first downward fold line 43. The curved part 23 has a slit 51 that intersects the first downward fold line 43 and second upward fold line 45 located outside the shelf part 49.

Description

  The present invention relates to the structure of an automobile hood.

  Conventionally, as a configuration of a hood that covers an engine room of an automobile, a hood inner panel that supports the hood outer panel is fixed to the back side of the hood outer panel that constitutes the exterior design of the automobile, and the rear end of the hood inner panel has a hinge structure. Some of them are connected to the body so as to be pivotable up and down. When such a hood is closed, since the open end edge is received by the open end edge of the engine room, a larger impact is applied to the front part on the open end side. Therefore, durability strength that can withstand the impact at the time of closing is required. On the other hand, when a pedestrian collides with the front part of the vehicle, it is desired to absorb the impact by collapsing the hood.

  In relation to this, Patent Document 1 discloses a hood for the purpose of reinforcing a shock when closing the hood and protecting a pedestrian. In the hood of Patent Document 1, a reinforcing member is disposed between the hood outer panel and the hood inner panel at the position of the striker provided at the center of the front end of the hood to lock the hood in a closed state. A reinforcing member extends rearward along the back surface of the hood outer panel. According to the structure of this hood, the position of the striker to which a greater impact is applied when closing can be reinforced. Also, from the viewpoint of pedestrian protection, when the hood is deformed when the pedestrian collides with the center of the front part of the vehicle, the reinforcing member is formed to extend rearward. It is said that by deforming a wide area, it is possible to avoid bottoming out soon after the start of deformation and to absorb the shock efficiently.

JP 2005-212510 A

  However, when the hood of the above-mentioned Patent Document 1 collides with a pedestrian and the hood is crushed, the hood outer panel can be improved from the back side by the reinforcing member. Since it is reinforced and it is difficult to be crushed as a whole, the impact load that a pedestrian receives cannot always be reduced. From the viewpoint of pedestrian protection, it is more effective to reduce the collision load received by the pedestrian by making the hood easy to collapse. However, the structure of the hood of Patent Document 1 described above does not achieve both the durability against the impact when closing and the contradictory performance of being easily crushed.

  By the way, when a pedestrian collides with an automobile, it is highly assumed that the vehicle collides diagonally forward of the vehicle. However, the conventional hood structure is not focused on a pedestrian colliding diagonally forward of the vehicle.

  Therefore, the present invention assumes a case where a pedestrian collides with an obliquely forward position of the vehicle, and makes the hood easily crushed when the pedestrian collides, while ensuring durability against an impact when closing the hood. It aims at improving pedestrian protection performance.

  In the present invention, a hood inner panel that supports the hood outer panel is fixed to the back side of the hood outer panel that constitutes the exterior design of the automobile, and the rear end of the hood inner panel is pivotable up and down via a hinge structure. The hood inner panel has an outer shape in which the front end of the side portion has a curved shape, and the side portion and the front portion are smoothly continuous via the curved shape portion. At the edge of the panel, a first valley fold line that is valley-folded when viewed from the upper surface side with the hood closed, and a first mountain fold line that is located inside the first valley fold line A line extends in a direction along the outer shape of the hood inner panel and is formed from a side portion to the front portion via the curved shape portion, and the curved shape portion includes the first valley fold. line A second mountain fold line and a second valley fold line forming a shelf between the first mountain fold line and a direction along the first mountain fold line and the first valley fold line. The curved shape portion is formed with a slit that intersects the first valley fold line and the second mountain fold line positioned outward from the shelf. It is characterized by that.

  In this hood structure, the first valley fold line and the first mountain fold line are formed on the edge of the hood inner panel from the side portion through the curved shape portion to the front portion. In the portion, a second mountain fold line and a second valley fold line extending in a direction along these fold lines are formed in a positional relationship in which the shelf is formed between these fold lines. And in this curved shape part, a slit is formed so that it may cross | intersect the two fold line (1st valley fold line and 2nd mountain fold line) located more outward, and these two fold lines are It is divided in the extending direction. As a result, in the curved shape portion, the outer fold line forming portion is weakened and easily deformed, and when a pedestrian collides diagonally in front of the vehicle, the collision load is obliquely above the hood. The first valley fold line and the second mountain fold line that are located on the outer side when being added from the above are largely deformed so that the bend line extends, so that the collision load can be absorbed. However, in the curved shape portion, two fold lines of the first mountain fold line and the second valley fold line are continuously formed without being divided immediately inside the weakened portion, and the hood is Rigidity sufficient to hold the plate shape against the closing impact is secured, and the opening and closing durability is excellent. That is, the first mountain fold line extends continuously from the side portion to the front portion via the curved shape portion, thereby improving the rigidity. The second valley fold line is a curved shape portion with respect to the first valley fold line which is divided at the curved shape portion but is formed from the side portion to the front portion via the curved shape portion. To compensate for the continuity of That is, the first valley fold line on the side portion and the front portion and the second valley fold line on the curved portion exhibit a reinforcing effect like a series of fold lines, and this also improves the rigidity. . Therefore, it is possible to improve pedestrian protection performance when a pedestrian collides diagonally forward of the vehicle while ensuring durability against an impact when closing the hood during normal use.

  In this hood structure, the hood inner panel has both sides at the rear end connected to the body via a hinge structure, and includes an engagement portion for engaging the body and closing the hood at the center of the front end. It is preferable that the first valley fold line and the first mountain fold line are formed from the vicinity of the connecting portion to the body by the hinge structure to the engaging portion at the center of the front portion.

  In this case, the opening / closing durability is more reliably improved by the first mountain fold line and the first valley fold line and the second valley fold line that function as if they are continuous.

  In addition, as the slit, a long hole extending in the inner and outer directions of the curved shape of the first valley fold line and the second mountain fold line is provided with an interval in the extending direction of the first valley fold line and the second mountain fold line. A plurality of them can be formed.

  In this case, by adjusting the width, number, and interval of the slits, the ease of dent of the hood inner panel can be easily adjusted, and the pedestrian protection performance can be improved accurately.

  ADVANTAGE OF THE INVENTION According to this invention, while ensuring the durability with respect to the impact at the time of closing a hood, the pedestrian protection performance when a pedestrian collides diagonally ahead of a vehicle can be improved.

It is a front perspective view of a car provided with the structure of the hood concerning the embodiment of the present invention. It is the top view of the hood inner panel distribute | arranged inside the hood shown by FIG. 1, and is the figure shown as the state seen from the lower surface side in the state which closed the hood. It is sectional drawing which showed the partial cross section of the diagonally forward position of the hood shown by FIG. 1 corresponding to the III-III cross section of the hood shown by FIG.

  The structure of the hood of the present invention will be described with reference to a specific embodiment with reference to FIGS. This embodiment is an embodiment in which the present invention is applied to a so-called minivan type automobile C. In addition, the front and rear, right and left in the figure, and the upper and lower sides represent the front and rear, right and left in the motor vehicle C, and the upper and lower sides.

  As shown in FIG. 1, an engine room ER is provided in the front part of the automobile C. The upper opening of the engine room ER can be opened and closed by the hood 11. The hood 11 is formed so that the front end side is gently curved downward. The rear portion of the hood 11 is connected to the body of the automobile C via a hinge mechanism (not shown), and is configured to open and close by rotating up and down around the rear portion by the hinge mechanism. The center of the front end of the hood 11 is engaged with the body of the automobile C so that the hood 11 is held in a closed state.

  As shown in FIG. 3, the hood 11 includes a hood outer panel 13 that constitutes the appearance design of the automobile C, and a hood inner panel 21 that supports the hood outer panel 13 from the back side. The edge of the hood outer panel 13 is folded back, and the hood inner panel 21 is hemmed.

  The hood inner panel 21 supports the hood outer panel 13 from the back side (engine room ER side) and reinforces the hood outer panel 13. As shown in FIG. 2, the outer shape of the hood inner panel 21 is such that the left and right side portions 21 s extend in the front-rear direction, and the front portion 21 f has an arc shape in which the center slightly swells. And the side part 21s and the front part 21f are connected via the curved shape. In this specification, the side front end portion whose outer shape of the hood inner panel 21 has a curved shape, in other words, the front side end portion is referred to as a curved shape portion 23. Hinge mounting holes 25h are formed in the left and right side portions of the rear end of the hood inner panel 21, and an arm 25a of a hinge mechanism for connecting the body of the automobile C so as to be rotatable is connected. On the other hand, a striker 27 is provided at the center of the front end of the hood inner panel 21. The striker 27 has a substantially U shape projecting toward the engine room ER, and engages with a hood lock provided at the opening edge of the engine room ER. Thereby, the hood 11 is held in a closed state. The striker 27 corresponds to the engaging portion of the present invention. In addition, cushion rubber mounting holes 29 and 29 are formed at the edge of the front end of the hood inner panel 21 at the position closest to the curved portion 23 on the relatively side, and cushion rubber (not shown) is used for the engine. It is attached to protrude to the room ER side. The cushion rubber is interposed between the hood 11 and the opening edge of the engine room ER when the hood 11 is closed, so as to reduce the impact when the hood 11 is closed.

  A plurality of relatively large holes 31 are formed in the central portion of the hood inner panel 21. A plurality of holes 33 smaller than these holes 31 are formed around the relatively large hole 31. Since the holes 31 and 33 are formed in the central portion of the hood inner panel 21 as described above, the hood 11 is reduced in weight, and a pedestrian who collides with the front portion of the car C gets on the hood 11. In this case, the hood 11 can be recessed to absorb the impact and protect the pedestrian.

  The hood inner panel 21 has a first mountain fold line 41 and a first valley fold outside the region where the edges 31, 33 contributing to weight reduction and pedestrian protection are formed. A line 43, a second mountain fold line 45, and a second valley fold line 47 are formed extending along the outer shape of the hood inner panel 21 (see FIGS. 2 and 3). In this specification, when the hood 11 is closed, a fold line that is a valley fold when viewed from above the automobile C is referred to as a valley fold line, and a fold line that is a mountain fold is referred to as a mountain fold line.

  As shown in FIG. 2, the first mountain fold line 41 is formed so as to go around the side portion 21 s, the curved shape portion 23, and the front portion 21 f, and to the left and right sides of the rear end of the hood inner panel 21. From the position just outside the hinge mounting hole 25h formed in the part to the front part 21f via the curved shape part 23, the front part 21f continues to the left and right other side side through the outside of the striker 27, It passes through the curved shape part 23 on the left and right other side parts, and reaches a position just outside the hinge mounting hole 25h formed on the left and right other side parts. The first valley fold line 43 is located outside the first mountain fold line 41 and outside the hinge mounting hole 25 h formed on the left and right side portions of the rear end in the same manner as the first mountain fold line 41. To the curved shape portion 23, the front portion 21f, the curved shape portion 23 on the left and right other side portions, and the hinge attachment hole 25h formed at the rear end of the left and right other side portions.

  The second mountain fold line 45 and the second valley fold line 47 are formed in a positional relationship between the first mountain fold line 41 and the first valley fold line 43 to form the shelf 49. That is, as well shown in FIG. 3, the positional relationship between the fold lines is as follows: from the inside to the outside, the first mountain fold line 41, the second valley fold line 47, the second mountain fold line 45, and the first They are arranged in the order of the valley fold line 43. As shown in FIG. 2, the second mountain fold line 45 and the second valley fold line 47 are formed from the position outside the hinge mounting hole 25h to the side portion 21s and the curved shape portion 23, respectively. It extends through the entire curved shape portion 23 to the vicinity of the cushion mounting hole 29 provided at the side position of the front portion 21f, and approaches and converges with each other.

  A slit 51 is formed in the curved shape portion 23 of the hood inner panel 21. The slit 51 is formed by punching as an elongated hole elongated in the inner and outer directions of the arc shape of the curved portion 23. The slit 51 intersects with the first valley fold line 43 and the second mountain fold line 45 located on the outer side, and a plurality of slits 51 are formed at intervals in the extending direction of these fold lines.

According to the hood 11 of the above structure, there exist the following effects.
First, on the edge of the hood inner panel 21, a first mountain fold line 41 is continuously formed continuously around the side portion 21 s, the curved shape portion 23, and the front portion 21 f, and the hood 11 is closed. It is reinforced so that the plate surface shape can be maintained against impact. In addition, the first valley fold line 43 is interrupted in the extending direction by the slit 51 in the curved shape portion 23, but the second valley fold line 47 is continuously formed in the curved shape portion 23. Thus, the first valley fold line 43 and the second valley fold line 47 can exert a reinforcing effect like a series of fold lines. Thereby, the durability with respect to the impact at the time of closing the food | hood 11 is securable. And the 1st mountain fold line 41 and the 1st valley fold line 43 which bear reinforcement are formed from the position near the hinge attachment hole 25h at the rear end to the position near the striker 27 at the center of the front end. The reinforcing effect against the impact at the time of closing is further ensured. Moreover, the first mountain fold line 41 and the first valley fold line 43 extend from the left and right sides of the rear end to the left and right sides of the side 21s, the curved portion 23, and the front 21f. The reinforcement effect is even more certain.

  On the other hand, as shown in FIG. 1, the hood 11 is easily crushed when a pedestrian collides with a position diagonally forward of the automobile C and a collision load F is applied obliquely from above, and has excellent pedestrian protection performance. Can be demonstrated. That is, as shown in FIG. 2, the curved shape portion 23 of the hood inner panel 21 positioned obliquely forward of the automobile C is more than the first mountain fold line 41 and the second valley fold line 47 that bear the reinforcement. A slit 51 is provided at a position closer to the end than the outside. Thereby, the 1st valley fold line 43 and the 2nd mountain fold line 45 are divided in the extending direction, the reinforcement effect by these fold lines is not exhibited, and it is weak. Therefore, when a collision load F is applied obliquely from above to the curved portion 23, the bending of the first valley fold line 43 and the second mountain fold line 45 extends as shown by the two-dot chain line in FIG. By deforming so greatly, the collision load F can be absorbed and a pedestrian can be protected. Moreover, since the slit 51 is formed by punching, it contributes to the weight reduction of the hood 11.

11 Hood 13 Hood outer panel 21 Hood inner panel 23 Curved portion 25a Arm 25h Hinge mounting hole 27 Strike 41 First mountain fold line 43 First valley fold line 45 Second mountain fold line 47 Second valley fold line 49 Shelf 51 slit

Claims (3)

A hood inner panel supporting the hood outer panel is fixed to the back side of the hood outer panel constituting the exterior design of the automobile, and the rear end of the hood inner panel is connected to the body through a hinge structure so as to be vertically rotatable. The structure of
The hood inner panel has an outer shape in which the front end of the side has a curved shape, and the side portion and the front portion smoothly continue through the curved shape portion,
At the edge of the hood inner panel, a first valley fold line that is valley-folded when viewed from the upper surface side with the hood closed, and a first valley fold line that is located inside the first valley fold line. And a mountain fold line extending in a direction along the outer shape of the hood inner panel and formed from the side portion to the front portion via the curved shape portion,
The curved shape portion includes a second mountain fold line and a second valley fold line that form a shelf portion between the first valley fold line and the first mountain fold line. Extending in a direction along the first fold line and the first valley fold line,
The curved shape portion is formed with a slit that intersects the first valley fold line and the second mountain fold line located outward from the shelf. . The structure of the hood according to claim 1,
The hood inner panel is connected to the body via the hinge structure on both sides at the rear end,
An engagement portion for engaging the body at the center of the front end to close the hood;
The hood characterized in that the first valley fold line and the first mountain fold line are formed from the vicinity of the connecting portion to the body by the hinge structure to the engaging portion at the center of the front part. Structure. It is the structure of the food | hood of Claim 1 or Claim 2, Comprising:
The slit is a long hole extending inward and outward of the curved shape of the first valley fold line and the second mountain fold line, and the extending direction of the first valley fold line and the second mountain fold line A plurality of hoods are formed at intervals.

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