JP3947709B2 - Vehicle cowl structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cowl structure of a vehicle, and more particularly to a cowl structure that is crushed and deformed to absorb an impact when an external object hits from above.
[0002]
[Prior art]
  Recently, a cowl of a vehicle has an open cross-sectional structure so as to be crushed and deformed to absorb an impact when an external object hits from above. 11A and 11B show a typical example of a conventional cowl structure of this type, which extends in the vehicle width direction along the upper edge of the dash panel 3 that partitions the engine room and the passenger compartment, and has left and right front pillars. 60 and apron upper member61The cowl 1E erected between the joints with the bottom wall 11 extends in a shelf shape from the upper edge of the dash panel 3 to the engine room side, and the dash panel 3 extends upward from the rear edge of the bottom wall 11 A vertical wall portion 12 standing upright and an upper wall portion 13 projecting in a shelf shape from the upper edge of the vertical wall portion 12 to the engine room side and adhering and supporting the lower edge of the windshield 70. An open cross-sectional structure is formed in which a gap is formed between the front edge of the portion 11 and the front edge of the upper wall portion 13. An easily deformable portion 14 that is easily crushed and deformed in the vertical direction is formed at the middle of the vertical wall portion 12.
[0003]
As shown in FIG. 11 (B), the cowl 1 has an impact such as a pedestrian or the like hitting the lower end of the windshield 70 from above in the event of a collision, and the collision load F (white) is applied to the cowl 1E via the windshield 70. When the arrow) acts, the vertical wall portion 12 is crushed around the easily deformable portion 14 (indicated by a broken line in the figure) to absorb the impact.
[0004]
Further, as another conventional cowl structure that is crushed and absorbs shock, as shown in FIGS. 12A and 12B, a closed cowl 1G provided along the upper edge of the dash panel 3 is provided. The glass support portion 9 is composed of a bent portion 91 having a substantially rectangular cross-section projecting obliquely upward and a box portion 92 having a closed cross-sectional structure formed at the tip of the bent portion 91 and supporting the lower edge of the windshield 70. There is something that provided. (For example, refer to Patent Document 1). According to this, when an external object hits the lower end of the windshield 70 and a collision load F (white arrow) is applied, the bent portion 91 of the glass support portion 9 is deformed and the box portion 92 is displaced downward (FIG. 12B )), Absorbing shocks during that time. In the figure, 98 indicates an engine hood and 99 indicates a cowl louver.
[0005]
[Patent Document 1]
JP-A-11-321709
[0006]
[Problems to be solved by the invention]
However, in the conventional cowl structure with an open cross section, since the impact is absorbed only by the vertical wall portion 12, the resistance against the collision load is low, the deformation stroke when the collision load is applied increases, and the collision load is reduced. If it is large, it may run out. Further, even in the other conventional cowl structure provided with the glass support part 9, if the collision load is large, the box part 92 of the glass support part 9 may be bottomed out to the cowl 1G, and the number of parts is large and the structure is complicated. There was a problem. Therefore, the present invention has been made with the object of realizing a cowl structure for a vehicle that has a simple structure and can sufficiently exhibit shock absorbing performance.
[0007]
[Means for Solving the Problems]
  The present invention includes a bottom wall portion that extends in a vehicle width direction along an upper edge of a vertical wall-shaped dash panel that partitions an engine room and a vehicle compartment of a vehicle, and extends in a shelf shape from the vehicle compartment side to the engine room side, A vertical wall portion having an easily deformable portion which is erected from the bottom wall portion and is easily crushed up and down by a load acting from above at an intermediate position in the vertical direction, and extends from the upper edge of the vertical wall portion in a shelf shape In the cowl structure of the vehicle comprising the upper wall portion that supports the front edge, between the upper wall portion and the bottom wall portion,A plurality of columnar shock absorbing members made of a panel material that vertically ties the upper wall portion and the bottom wall portion are installed at a wider interval in the vehicle width direction than the width of the shock absorbing member. Reinforcing flanges are formed on the left and right edges of the absorbent member, and an easily deformable portion is provided in the middle portion in the vertical direction without the reinforcing flange being formed. When a collision load is applied from above the cowl, the easily deformable portion is Crush and deform to absorb impact(Claim 1).
[0008]
  Since a plurality of shock absorbing members are provided between the top wall portion and the bottom wall portion, when a collision load is applied due to the resistance of the cowl against the collision load between the shock absorbing member and the vertical wall portion, the shock absorbing member acts at the beginning. The shock absorbing member and the vertical wall portion are stretched to such an extent that the object is not damaged. Thereafter, the vertical wall portion and the impact absorbing member are crushed and deformed by the respective easily deformable portions to absorb the impact. In this case, the cowl has a small deformation stroke and does not bottom out.
[0009]
  The vertical wall portion is erected so as to extend the dash panel upward from the rear edge position of the bottom wall portion, and the upper wall portion projects from the upper edge of the vertical wall portion to the engine room side like a shelf. And the shock absorbing member is bridged between the front edge of the upper wall portion and the front edge of the bottom wall portion (Claim 2). The structure can be simplified.
[0010]
  The vertical wall portion is erected so as to extend the dash panel upward from the rear edge position of the bottom wall portion, and the upper wall portion is bent by refracting the upper end portion of the vertical wall portion toward the engine room side. Forming the shock absorbing member between the front edge of the upper wall portion and the vicinity of the upper edge of the dash panel at a position near the rear edge of the bottom wall portion (Claim 3). The impact absorbing member and the vertical wall portion can be reliably crushed and deformed between the upper wall portion and the dash panel.
[0011]
  The vertical wall portion is erected from the front-rear intermediate position of the bottom wall portion, and the upper wall portion is formed by refracting the upper end portion of the vertical wall portion toward the passenger compartment side. It spans between the windshield adhesive part on the top wall and the position directly above the dash panel on the rear edge of the bottom wall (Claim 4). AboveClaim 3The same effect as the cowl structure can be obtained.
[0012]
  The plurality of shock absorbing members are connected in a belt shape in the vehicle width direction between their upper ends and lower ends (Claim 5).
[0013]
  An easily deformable portion that is easily crushed and deformed when a collision load is applied from above is formed in the connecting portion that connects the upper ends of the plurality of shock absorbing members (Claim 6).
[0014]
  The vertical wall portion, the upper wall portion, and the shock absorbing member are integrally formed (Claim 7).
[0015]
  The dash panel is provided with a dash reinforcement that reinforces the dash panel along the wall surface on the vehicle compartment side at the center position in the vehicle width direction, and the cowl has the vertical wall portion at the center position in the vehicle width direction. And a first reinforcing member that connects the upper end of the dash reinforcement, a second reinforcing member that is provided inside the cowl and connects the upper wall portion, the vertical wall portion, and the bottom wall portion, and A third reinforcing member that protrudes from the dash panel along the lower surface of the bottom wall portion toward the engine room is provided (Claim 8). The first and third reinforcing members can prevent the lower edge of the windshield from vibrating.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
  A first embodiment of a cowl structure to which the present invention is applied will be described with reference to FIG. As shown in FIG. 1A, the cowl 1 extends in the vehicle width direction along the upper edge of the vertical wall-shaped dash panel 3 that partitions the engine room and the vehicle compartment of the vehicle body. The left and right apron upper members of the cowl 1 extend in the front-rear direction along the upper edges of the left and right side walls of the engine room.61It is connected to a connecting portion between the rear end of the rear pillar and an intermediate portion of the front pillar 60 rising along the left and right side edges of the dash panel 3. In the figure,62Is a suspension tower on the left and right side walls of the engine room,63Indicates a front side member extending in the front-rear direction along the lower edge of the side wall of the engine room.
[0017]
  As shown in FIGS. 1A and 1C, the cowl 1 includes a cowl lower 11 that forms a bottom wall, a cowl inner 12 that rises from the rear edge of the cowl lower 11 and forms a vertical wall, and an upper end of the cowl inner 12. It is composed of three panel members composed of a cowl outer 13 that forms an overhanging upper wall portion, and has an open cross-sectional structure in which the space between the front edge of the cowl lower 11 and the front edge of the cowl outer 13 opens forward. The left and right ends of the cowl 1 are closed with a cowl side panel 19 made of a panel material, and the apron upper member is interposed through the cowl side panel 19.61And the front pillar 60. The cowl lower 11 is provided so as to project from the upper edge flange 31 refracted to the engine room side of the upper edge of the dash panel 3 in a shelf shape to the engine room side, and the rear edge flange of the cowl lower 11 and the upper edge flange of the dash panel 3 31 is polymerized and welded.
[0018]
  The cowl inner 12 has a lower edge flange that is refracted toward the passenger compartment, and a rear edge flange of the cowl lower 11 and an upper edge flange of the dash panel 3.31The cowl inner 12 is erected so as to extend the dash panel 3 upward at a position offset from the dash panel 3 to the engine room side. The cowl inner 12 is formed with an easily deformable portion 14 that is easily crushed and deformed by a collision load F (white arrow) acting from above over the entire width in the vehicle width direction at the upper and lower intermediate positions. The easily deformable portion 14 forms an inclined portion that refracts obliquely upward from the lower side toward the engine room side on the plate surface of the cowl inner 12, and has a substantially Z-shaped cross section that refracts vertically upward from the upper end of the inclined portion. Is formed.
[0019]
The cowl outer 13 is provided so as to protrude in a shelf shape from the upper edge of the cowl inner 12 toward the engine room side, and the rear edge flange is overlap-welded to the upper edge flange refracted toward the cabin side of the cowl inner 12. The cowl outer 13 is configured such that the lower edge of the windshield 70 to be fitted into the front window of the vehicle body is bonded to the bonding portion 130 provided at the front end of the upper surface, and the lower edge of the windshield 70 is supported.
[0020]
As shown in FIGS. 1 (A) and 1 (B), between the front edge of the cowl lower 11 and the front end of the cowl outer 13, there is a predetermined distance in the vehicle width direction between the front ends of the cowl lower 11 and the cowl outer 13. Are provided with a plurality of columnar members 2 made of a panel material that extends in the vertical direction. These columnar members 2 are impact-absorbing members that can be crushed and deformed by the action of the collision load F and absorb an impact when the collision load is applied by the crushed deformation (hereinafter, the columnar members are referred to as shock-absorbing members). . Each impact absorbing member 2 is formed integrally with the cowl outer 13 and is bent downward from the front edge of the cowl outer 13. Further, each shock absorbing member 2 is formed with reinforcing flanges 21 that are refracted in a substantially L-shaped cross section at the side edges on the left and right sides. A reinforcing flange (FIG. 1C) having the same cross-sectional shape as that of the reinforcing flange 21 is also formed on the front end edge of the cowl outer 13 positioned between the shock absorbing members 2. Each impact absorbing member 2 has a lower edge flange 22 whose lower end is refracted toward the engine room side and is welded to the front edge flange of the cowl lower 11 by superposition welding.
[0021]
  If an external object such as a pedestrian's head or shoulder hits the lower end of the windshield 70 from above due to a collision accident, a collision load F acts on the cowl 1 via the lower end of the windshield 70. Become. In this case, since the cowl 1 is provided with a plurality of shock absorbing members 2 that are mounted between the front edges of the cowl lower 11 and the cowl outer 13, the resistance of the cowl 1 to the collision load F is higher than that of a conventional cowl structure having an open cross section. Has improved. Therefore, the drag is exerted at the beginning when the external object collides, and the shock absorbing member 2 and the vertical wall portion 12 are stretched to such an extent that the external object is not damaged. Some are countered. After that, shock absorbing member due to the action of the load that was not canceled2The cowl inner 12 is crushed and deformed (indicated by the chain line in FIGS. 1B and 1C) to absorb the impact of the collision. At this time, the deformation stroke of the cowl 1 is suppressed to a small stroke, so that bottoming does not occur.
[0022]
Further, since the cowl 1 has a plurality of impact absorbing members 2 laid between the front edges of the cowl lower 11 and the cowl outer 13, the structure is simpler than a cowl structure having a conventional glass support portion. Each shock absorbing member 2 may have a structure in which another columnar member made of a panel material is bridged between the front edges of the cowl lower 11 and the cowl outer 13. By integrally molding the impact absorbing member 2 with the cowl outer 13 as in this embodiment, the impact absorbing member 2 can be easily molded when the cowl outer 13 is molded, and the productivity and assemblability are good.
[0023]
The resistance against the collision load F of the cowl 1 can easily damage an external object by changing the number and interval of the shock absorbing members 2 and the width and shape of each shock absorbing member 2 at the stage of designing the cowl. It can be set to a drag that does not give.
[0024]
Next, based on FIG. 2, a second embodiment of the present invention will be described with a focus on differences from the first embodiment. In the figure, the same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. As shown in FIGS. 2A, 2B, and 2C, the cowl 1A includes a cowl lower 11 that forms a bottom wall, a cowl inner 12 that forms a vertical wall, and a cowl outer 13 that forms an upper wall. It is. Between the front edge of the cowl lower 11 and the front edge of the cowl outer 13, a plurality of shock absorbing members 2 a that extend in the vertical direction are provided at predetermined intervals in the vehicle width direction.
[0025]
  Each shock absorbing member 2 a is integrally formed with the cowl outer 13. The cowl outer 13 is provided with a vertical plate 20 that is refracted downward from the front edge of the upper wall portion and extends vertically between the front edge of the upper wall portion and the front edge of the cowl lower 11 over the entire width in the vehicle width direction. A plurality of rectangular openings 23 are formed in the vertical plate 20 along the vehicle width direction, and a columnar shock absorbing member 2a is formed by a partition between adjacent rectangular openings 23. The rectangular opening 23 has a vertical dimension that is about two-thirds of the height dimension of the vertical plate 20 and leaves a blank portion at the vertical position of the vertical plate 20. The lateral width of the rectangular opening 23 is at least wider than the lateral width of the shock absorbing member 2a.A reinforcing flange 21 similar to that in the first embodiment is formed on the side edge of the shock absorbing member 2a.The upper edge of the rectangular opening 23 andOn the lower edge is a reinforcing flange 21 andA reinforcing flange having the same cross-sectional shape is provided.
[0026]
Each impact absorbing member 2a formed integrally with the vertical plate 20 is formed by superposing and welding a lower edge flange 22a having a lower edge of the vertical plate 20 bent toward the engine room to a front edge flange of the cowl lower 11.
[0027]
According to the present embodiment, when an external object hits the lower end of the windshield 70 from above and a collision load F acts on the cowl 1A, the same effects as those of the first embodiment can be obtained. In addition, since each of the shock absorbing members 2a formed integrally with the vertical plate 20 has the lower edge flange 22a connected in series in the vehicle width direction, when the shock absorbing member 2a and the cowl lower 11 are coupled, the lower edge flange 22a. Can be welded in series to the front edge flange of the cowl lower 11 in the vehicle width direction, so that the assembling work is better than in the first embodiment. In this embodiment, the vertical plate 20 constituting the shock absorbing member 2a is integrally formed with the cowl outer 13. However, the vertical plate may be a separate member, and according to this, the plate of the shock absorbing member 2a with respect to the cowl outer 13 is used. Since the thickness can be changed and the resistance against the collision load of the cowl is set, the thickness and thickness of the impact absorbing member 2a can be changed in addition to the number and interval of the impact absorbing members 2a and the width and shape of each impact absorbing member 2a. Convenient for setting drag.
[0028]
  When a plurality of impact absorbing members 2a are integrally formed by a vertical plate as in the second embodiment, a belt-like shape extending in the vehicle width direction is left between the upper and lower ends of each impact absorbing member 2a at the vertical position of the rectangular opening 23. In some cases, the strength against the vertical deformation of each impact absorbing member 2a becomes higher than necessary. Therefore, as shown in FIG.Reinforcing flanges 21 on both side edges of each shock absorbing member 2a are not formed at the upper and lower intermediate portions, but are formed in a flat plate shape over the entire width in the width direction of the shock absorbing member 2a.It is desirable to provide the easily deformable portion 24. According to this, the strength of the shock absorbing member 2a does not become higher than necessary, and the shock absorbing member 2a is easily crushed and deformed by the collision load F. The easily deformable portion 24 is not limited to this, and for example, a groove having a substantially square cross section may be provided in the entire width direction of the shock absorbing member 2a.
[0029]
Further, when a plurality of shock absorbing members 2a are integrally formed by the vertical plate 20, as shown in FIG. 4, the blank portion 25 forming the upper edge of the rectangular opening 23 located in the adjacent shock absorbing member 2a has a substantially mountain shape. It is desirable to provide a notch 26. According to this, the blank portion 25 connecting the upper ends of the adjacent shock absorbing members 2a is easily bent downward and deformed by the collision load F acting from above.
[0030]
For example, when an external object such as the head or shoulder of a pedestrian hits, the collision load F acts on the cowl 1A in a narrow range in a part in the vehicle width direction. As shown in FIG. 5A, when the collision load F acts on a position immediately above the margin portion 25 between the adjacent shock absorbing members 2a, the margin portion 25 is bent and deformed downward while the notch 26 is opened and deformed. At the same time, a collision load F acts on the shock absorbing members 2a on both sides, and these 2a are crushed downward and deformed. In this case, the upper wall portion of the cowl is also partially bent and deformed by the bending deformation of the blank portion 25. In this way, in addition to the impact absorbing effect due to the crushing deformation of the impact absorbing member 2a, the impact can be absorbed by the bending deformation of the upper wall portion and the blank portion 25.
[0031]
Further, as shown in FIG. 5B, when the collision load F acts on the position immediately above the impact absorbing member 2a, the notches 26 on both sides of the impact absorbing member 2a are opened and deformed while the impact absorbing member 2a is deformed. The margin part 25 and the upper wall part immediately above are bent and deformed, the shock absorbing member 2a is crushed and deformed, and in addition to the shock absorbing effect by the crushed deformation of the shock absorbing member 2a, the upper wall part and the blank part 25 are bent and deformed. A shock absorbing effect is obtained.
[0032]
The cowl 1A supports the lower end of the windshield 70 by adhering it to the front end of the upper surface of the cowl outer 12. If the supporting force is low, the lower edge of the windshield 70 may vibrate and may generate abnormal noise. In particular, the lower edge of the windshield 70 tends to vibrate at the center in the vehicle width direction. Therefore, it is necessary to reinforce the support force at the center of the cowl 1A in the vehicle width direction, and the support force strengthening structure is shown in FIG. The dash panel 3 has a substantially hat-shaped reinforcement 30 that forms a closed cross-section with the panel surface along the panel surface on the vehicle compartment side in the center in the vehicle width direction, from the lower edge of the dash panel 3. It is installed in the vertical direction over the upper edge.
[0033]
As shown in FIGS. 6 and 7 (A), the upper end of the reinforcement 30 and the upper and lower intermediate portions of the cowl inner 12 are slanted in the center of the cowl 1A in the vehicle width direction at the rear position on the passenger compartment side. A first reinforcing member 51 made of a thin metal plate is provided to connect the back surface of the cowl inner 12 and the upper end of the reinforcement 30.
[0034]
Further, as shown in FIGS. 6 and 7B, at the center in the vehicle width direction inside the cowl 1A, the lower surface of the glass bonding portion 130 of the cowl outer 13, the upper and lower intermediate portions of the inner surface of the cowl inner 12, and the cowl lower 11 A second reinforcing member 52 is provided to connect the front and rear intermediate portions of the upper surface. The second reinforcing member 52 is a narrow-width metal body having a substantially hat-shaped cross section extending in the vertical direction, and the upper part from the upper and lower middle part is refracted into a front diagonally upward shape with the open side as the front. The second reinforcing member 52 has a lower end coupled to the front / rear intermediate portion of the upper surface of the cowl lower 11 and is erected in a substantially vertical direction, and a rear surface of the refracting portion is coupled to the upper / lower intermediate portion of the inner surface of the cowl inner 12. The upper end is extended obliquely from the front to the front and is coupled to the lower surface of the glass bonding portion 130 of the cowl outer 13.
[0035]
Further, on the lower surface of the center portion in the vehicle width direction of the cowl 1 </ b> A, as shown in FIGS. 6 and 7C, forward from the upper end of the dash panel 3 on the engine room side along the lower surface of the cowl lower 11. A second reinforcing member 53 having a shallow cross section and a substantially inverted hat shape is provided to support the cowl lower 11 from below.
[0036]
The cowl 1 </ b> A connects the rear and lower surfaces of the vehicle compartment side at the center in the vehicle width direction to the highly rigid portion of the dash panel 3 reinforced by the reinforcement 30 by the first and third reinforcing members 51 and 53. In addition to being supported by the highly rigid portion of the dash panel 3, the glass bonding portion 130 is supported from below by the cowl lower 11 reinforced by the third reinforcing member 53 via the second reinforcing member 52. Therefore, the vibration of the lower edge of the windshield 70 is suppressed.
[0037]
  The reinforcing portion of the cowl 1A can sufficiently suppress vibration by reinforcing a narrow range of the central portion with respect to the entire length of the cowl 1A in the vehicle width direction.I can do itSince the range to be reinforced is narrow, the possibility that an external object such as a pedestrian hits the position directly above the reinforcing portion is reduced. Even if the second reinforcing member 52 hits a position directly above the reinforcing portion, the upper reinforcing portion is bent and deformed centering on the middle bent portion, and the glass bonding portion 130 is lowered, so that the shock absorbing member 2a is also crushed and deformed. (Indicated by the chain line in FIG. 6). Accordingly, since the impact is absorbed by the crushing deformation of the second reinforcing member 52 and the impact absorbing member 2a, damage to external objects can be reduced.
[0038]
FIG. 8 shows a third embodiment of the present invention. As shown in FIGS. 8A and 8B, the cowl 1 </ b> B of this embodiment is formed by two panels of a cowl upper 10 and a cowl lower 11. The cowl upper 10 rises from a joint portion between the rear edge flange of the cowl lower 11 and the upper edge flange 31 of the dash panel 3, and has a vertical wall portion 12a having an easily deformable portion 14 in the middle between the upper and lower sides, and an upper edge of the vertical wall portion 12a. The upper wall portion 13a that is refracted and projects toward the engine room side, and a plurality of shock absorbing members 2a that vertically extend the front edge of the upper wall portion 13a and the front end portion of the cowl lower 11 are integrally formed.
[0039]
The shock absorbing member 2a is formed between the adjacent rectangular openings 23 by forming a plurality of rectangular openings 23 along the vehicle width direction on a vertical plate that is refracted from the front edge of the upper wall portion 13a and extends downward. It is.
[0040]
According to the present embodiment, when an external object hits the lower end portion of the windshield 70 from above and a collision load F acts on the cowl 1B, the same effects as those of the first embodiment can be obtained. Further, since the vertical wall portion 12a, the upper wall portion 13a, and the impact absorbing member 2a are integrally formed, the number of welding points is small and the productivity of the cowl 1B is good.
[0041]
FIG. 9 shows a fourth embodiment of the present invention. As shown in FIGS. 9A and 9B, the cowl 1 </ b> C according to the present embodiment is a vertical structure that rises from the joint between the rear edge flange of the cowl lower 11 and the upper edge flange 31 of the dash panel 3 at the upper part of the cowl lower 11. A cowl upper 10a having a wall portion 12a and an upper wall portion 13a that refracts from the upper edge of the vertical wall portion 12a and projects toward the engine room side is installed, and the front edge of the upper wall portion 13a of the cowl upper 10a and the cowl lower 11 A plurality of impact absorbing members 2b extending in the vertical direction are bridged between the rear end portions of the two.
[0042]
The plurality of shock absorbing members 2b are formed in a vertical plate 20a made of a different member by forming a plurality of rectangular openings 23 along the vehicle width direction, and between the adjacent rectangular openings 23, respectively. The shock absorbing member 2b is formed by superposing and welding the upper edge flange 27 to the lower surface of the front edge flange of the upper wall portion 13a of the cowl upper 10a, and the lower edge flange 22b to the dash panel 3 of the rear edge flange of the cowl lower 11 and the lower end of the cowl upper 10a. Polymerization welding is performed at the front position of the joint portion.
[0043]
According to the present embodiment, when an external object hits the lower end of the windshield 70 from above and a collision load F acts on the cowl 1C, the same operational effects as in the first embodiment are obtained, and the impact absorbing member 2b Since the lower end is coupled to a position close to the upper edge of the dash panel 3, the resistance against the collision load F is high, and the deformation stroke can be further reduced.
[0044]
FIG. 10 shows a fifth embodiment of the present invention. As shown in FIGS. 10 (A) and 10 (B), the cowl 1D of the present embodiment is obtained by replacing the vertical wall portion of the cowl structure and the shock absorbing member described in the fourth embodiment with the front and rear positions. There is a vertical wall portion 12b that rises from the front side position of the coupling portion between the rear edge flange of the cowl lower 11 and the dash panel 3 at the upper portion of the cowl lower 11, and is refracted from the upper edge of the vertical wall portion 12b to the vehicle interior side. A cowl upper 10b provided with an overhanging upper wall portion 13b is installed, and a plurality of impact absorbing members 2c are vertically mounted between the upper wall portion 13b of the cowl upper 10b and the dash panel 3 coupling portion of the cowl lower 11 It is.
[0045]
The plurality of shock absorbing members 2c are formed in a vertical plate 20b made of a separate member, with a plurality of rectangular openings 23 along the vehicle width direction, and formed between adjacent rectangular openings 23. In the impact absorbing member 2c, the upper edge flange 27a is superposed and welded to the lower surface of the glass bonding portion 130 of the cowl upper 10b, and the lower edge flange 22c is superposed and welded integrally with the joint portion of the rear edge flange of the cowl lower 11 with the dash panel 3. It is.
[0046]
According to this embodiment, the same effect as the fourth embodiment can be obtained. In the third to fifth embodiments, in order to reinforce the supporting force for supporting the lower edge of the windshield 70 of the cowl 1B, 1C, 1D, the cowl 1B, 1C, 1D is centered in the vehicle width direction. The first, second and third reinforcing members 51, 52, 53 (FIGS. 6 and 7) and the like are desirably applied.
[0047]
【The invention's effect】
According to the present invention, an external object such as a pedestrian is provided with a simple structure in which an impact absorbing member extending in the vertical direction is opposed to the vertical wall portion between the upper wall portion and the bottom wall portion of the cowl. The cowl's moderate drag against the impact load acting in the event of a collision and the shock absorption performance due to the crushing deformation of the cowl can be exerted in a well-balanced manner. When a collision accident occurs, the cowl is deformed without causing the cowl to bottom out. It is possible to absorb the impact on the external object with certainty.
[Brief description of the drawings]
1A and 1B show a first embodiment of the present invention, in which FIG. 1A is an overall perspective view of a cowl, and FIG. 1B is a cross-sectional view taken along line IB-IB in FIG. FIG. 1C is a cross-sectional view taken along line IC-IC in FIG.
2A and 2B show a second embodiment of the present invention, in which FIG. 2A is an overall perspective view of a cowl, FIG. 2B is a cross-sectional view taken along line IIB-IIB in FIG. FIG. 2C is a cross-sectional view taken along line IIC-IIC in FIG.
FIG. 3 is a perspective view of main parts showing a modification of the second embodiment.
FIG. 4 is a perspective view of relevant parts showing another modification of the second embodiment.
FIGS. 5A and 5B are schematic views showing a deformed state due to a collision load according to another modified example.
FIG. 6 is a main part perspective view showing still another modification of the second embodiment.
7A and 7B show a reinforcing member used in the above-described still another modified example. FIG. 7A is a perspective view of the first reinforcing member, and FIG. 7B is a perspective view of the second reinforcing member. FIG. 7C is a perspective view of the third reinforcing member.
8A and 8B show a third embodiment of the present invention, in which FIG. 8A is a cross-sectional view corresponding to FIG. 2B, and FIG. 8B is a cross-sectional view corresponding to FIG. It is.
9A and 9B show a fourth embodiment of the present invention, in which FIG. 9A is a cross-sectional view corresponding to FIG. 2B, and FIG. 9B is a cross-sectional view corresponding to FIG. It is.
10A and 10B show a fifth embodiment of the present invention, in which FIG. 10A is a cross-sectional view corresponding to FIG. 2B, and FIG. 10B is a cross-sectional view corresponding to FIG. It is.
11A is a perspective view of a cowl having a conventional open cross-sectional structure, and FIG. 11B is a cross-sectional view taken along line XIB-XIB in FIG. 11A.
12A and 12B show a cowl structure provided with a conventional glass support portion, in which FIG. 12A is a longitudinal sectional view thereof, and FIG. 12B is a longitudinal sectional view of a state deformed by a collision load.
[Explanation of symbols]
  1,1A, 1B, 1C, 1D cowl
  11 Bottom wall
  12, 12a, 12b, 12c Vertical wall
  13, 13a, 13b, 13c Upper wall portion
  130 Glass bonding part
  14 Easy deformation of vertical wall
  2, 2a, 2b, 2c Shock absorbing member
  21 Reinforced flange
  24 Easy deformation part
    25 Connecting part (margin)
  26 Easily deformable part of connecting part
  3 Dash panel
  30 Dash reinforcement
  51 1st reinforcement member
  52 Second reinforcing member
  53 Third reinforcing member
  F Impact load

Claims (8)

A bottom wall (11) extending in the vehicle width direction along the upper edge of the vertical wall-shaped dash panel (3) separating the engine room and the vehicle compartment of the vehicle and extending in a shelf shape from the vehicle compartment side to the engine room side; A vertical wall portion (12) having an easily deformable portion (14) which is erected from the bottom wall portion (11) and is easily crushed up and down by a load acting from above at an intermediate position in the vertical direction; and the vertical wall portion (12) In a cowl structure of a vehicle, which is formed in a shelf shape from the upper edge and includes an upper wall portion (13) supporting the front edge of the windshield (70) ,
Between the upper wall portion (13) and the bottom wall (11), columnar shock absorbing member made of an upper wall portion (13) and a bottom wall portion (11) from vertically hung pass panel material ( A plurality of 2a) are installed at a wider interval in the vehicle width direction than the width of the shock absorbing member (2a),
Each of the shock absorbing members (2a) is provided with reinforcing flanges ( 21 ) on the left and right side edges, and provided with an easily deformable portion (24) without forming the reinforcing flange ( 21 ) at the middle in the vertical direction .
A cowl structure for a vehicle, wherein when a collision load is applied from above the cowl (1), the easily deformable portion (24) is crushed up and down to absorb an impact . The vehicle cowl structure according to claim 1,
The vertical wall portion (12) is erected so as to extend the dash panel (3) upward from the rear edge position of the bottom wall portion (11), and the upper wall portion (13) is (12) Projecting in a shelf shape from the upper edge to the engine room side, the shock absorbing member (2a) is connected to the front edge of the upper wall part (13) and the front edge of the bottom wall part (11). The cowl structure of the vehicle between them . The vehicle cowl structure according to claim 1,
The vertical wall portion (12) is erected so as to extend the dash panel (3) upward from the rear edge position of the bottom wall portion (11), and the upper end portion of the vertical wall portion (12) is The upper wall portion (13) is formed by being refracted toward the engine room side, and the shock absorbing member (2a) is placed near the front edge of the upper wall portion (13) and the rear edge of the bottom wall portion (11). The cowl structure of the vehicle spanned between the upper edge of the dash panel (3) at the position . The vehicle cowl structure according to claim 1,
The vertical wall portion (12) is erected from the front and rear intermediate positions of the bottom wall portion (11), and the upper wall portion (13) is refracted toward the passenger compartment side with respect to the vertical wall portion (12). And the shock absorbing member (2a) is positioned directly above the dash panel (3) at the rear edge of the windshield (70) and the bottom wall (11) of the upper wall (13). The cowl structure of the vehicle built between the two . In the cowl structure of the vehicle according to any one of claims 1 to 4 ,
The plurality of shock absorbing members (2a) are a cowl structure of a vehicle in which the upper end and the lower end are connected in a band shape in the vehicle width direction . In the cowl structure of a vehicle according to claim 5,
A vehicle cowl structure in which an easily deformable portion (26) that is easily crushed and deformed when a collision load is applied to the connecting portion (25) connecting the upper ends of the plurality of shock absorbing members (2a) from above is formed . The vehicle cowl structure according to any one of claims 1 to 6 ,
A vehicle cowl structure in which the vertical wall portion (12), the upper wall portion (13), and the impact absorbing member (2a) are integrally formed . The vehicle cowl structure according to any one of claims 1 to 6 ,
The dash panel (3) is provided with a dash reinforcement (30) that reinforces the dash panel (3) along the wall surface on the passenger compartment side at a central position in the vehicle width direction. A first reinforcing member (51) for connecting the vertical wall portion (12) and the upper end of the dash reinforcement (30) at the center position in the vehicle width direction, and provided inside the cowl (1) A second reinforcing member (52) for connecting the upper wall (13) to the vertical wall (12) and the bottom wall (11 ), and the bottom wall (11) from the dash panel (3). A vehicle cowl structure provided with a third reinforcing member (53) protruding toward the engine room along the lower surface of the vehicle.