JP2006240393A - Front windshield supporting structure for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a front windshield supporting structure for a vehicle, capable of certainly supporting a front wind shied lower portion when a load which is normally acted and less than a predetermined value is inputted, and improving load absorbing efficiency by increasing permitted deforming amount of the front windshield lower portion when a load not less than the predetermined value is inputted. <P>SOLUTION: A cross member 4 composed of upper/lower panels 5, 6 forming a box portion 4a is cantilever-united at an upper end portion on a rear side wall 3b of a dash upper panel 3 united to an upper end portion of a dash lower panel 2. An upper part of a shelf portion 3a of the dash upper panel 3 is covered at predetermined intervals, and a brace 7 equipped with an easy-to-deform portion 8 is disposed between the cross member 4 and the shelf portion 3a. Therefore, the holding stiffness of the front windshield 1 is ensured under a normal use condition, and on the other hand, at emergency when an excessive load F is inputted to the front windshield 1, the front windshield 1 lower portion is depressed to efficiently absorb impact energy with crushing deformation of the brace 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle front windshield support structure.

Some automobiles are known in which the lower end portion of the front windshield is fixed and supported by an adhesive on the upper surface of a box-shaped cross member adjacent to the air box (cowl portion) ( For example, see Patent Document 1).
JP 2003-252145 A (page 4, FIG. 3)

  However, such a conventional front windshield support structure supports the lower part of the front windshield on the upper surface of the cross member, and its front wall is disposed substantially perpendicular to the front windshield surface and has a protruding portion. Therefore, the front wall of the cross member exhibits a large support rigidity even when a load is input to the front windshield from above, for example, an excessive load when an object collides with the front windshield during traveling. Therefore, it becomes difficult to increase the allowable displacement amount under the front windshield, and the absorption efficiency of the excessive collision load is lowered.

  Therefore, the present invention can reliably support the lower portion of the front windshield when a load of less than a predetermined value that normally operates is applied, while increasing the allowable deformation amount of the lower portion of the front windshield to increase the load absorption efficiency when a load of a predetermined value or more is input. The present invention provides a vehicle front windshield support structure.

In the present invention, it is substantially constituted by a shelf portion that is coupled to the upper end portion of the dash lower panel that separates the engine room and the vehicle compartment, and extends rearward of the vehicle, and a rear side wall that stands from the rear end portion of the shelf portion. A dash upper panel formed in an L-shaped cross section;
The upper end of the rear side wall is cantilevered so as to cover the upper part of the shelf at a predetermined interval, and each is arranged in the vertical direction at a predetermined interval to form a box part, A cross member comprising an upper panel and a lower panel supporting the lower end portion of the front windshield on the front end portion of the box portion;
The cross member is disposed in a space between the cross member and the shelf, and includes an easily deformable portion that facilitates a crushing deformation in response to a load input exceeding a predetermined value from above, and supports the cross member on the shelf. The main feature is that it has braces.

  According to the present invention, when a load less than a predetermined value that normally acts, such as during normal driving, car washing, and snowfall, is input, the front windshield is protected by the cross member and brace formed in a box shape with the dash upper panel and upper / lower panel. The lower part can be reliably supported.

  On the other hand, when an object collides with the lower part of the front windshield during driving and an excessive load exceeding the predetermined value is input from above, the brace is bent along with the bending deformation of the cross member that is cantilevered to the rear side wall of the dash upper panel. However, since the deformation is crushed downward from the easily deformable portion, the allowable deformation amount of the lower portion of the front windshield is increased, and as a result, the load absorption efficiency of the lower portion of the front windshield can be increased.

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

  1 to 4 show an embodiment of a front windshield support structure for a vehicle according to the present invention, FIG. 1 is a perspective view of a front waist portion of a vehicle where an air box is disposed, and FIG. FIG. 3 is an enlarged cross-sectional view taken along line A, FIG. 3 is an enlarged cross-sectional view taken along line BB in FIG. 1, and FIG. 4 is a cross-sectional view showing a deformed state of the brace against an excessive load.

  The vehicle front windshield support structure of the present embodiment is configured in the lower part of the lower portion of the front windshield 1 at the front of the vehicle compartment as shown in FIG. 1, and the engine room E and the vehicle compartment as shown in FIG. A dash upper panel 3 coupled to the upper end of the dash lower panel 2 separating R, and a cross member 4 comprising the upper panel 5 and the lower panel 6 coupled to the upper end of the dash upper panel 3 to form a box portion 4a A brace 7 disposed in a space between the cross member 4 and the dash upper panel 3, and the lower end portion of the front windshield 1 is attached to the upper surface of the front end portion of the cross member 4 with an adhesive 10. It is fixed and supported.

  That is, as shown in FIG. 2, the dash upper panel 3 is substantially constituted by a shelf 3a extending from the upper end of the dash lower panel 2 to the rear of the vehicle and a rear side wall 3b standing from the rear end of the shelf 3a. It is formed in an L-shaped cross section.

  Further, the upper panel 5 and the lower panel 6 have vehicle rear end portions 5a and 6a on the upper end portion of the rear side wall 3b of the dash upper panel 3 so as to cover the upper portion of the shelf portion 3a at a predetermined interval. The upper panel 5 and the lower panel 6 are separated by a predetermined distance in the vertical direction to form the box portion 4a.

  The vehicle front end portions 5b and 6b of the upper panel 5 and the lower panel 6 are joined to each other, the front end portions 5b and 6b are arranged in parallel with the front windshield 1, and the upper surface thereof is a support surface of the front windshield 1. It has become.

  Further, the brace 7 is formed in a front gate shape with a plate-like member as shown in FIG. 3, and its both side walls 7a, 7b are opposed to each other in the vehicle width direction, and the both side walls 7a, 7b A bent portion 8 to the outside as an easily deformable portion formed in the front-rear direction is formed in the middle portion in the vertical direction. In the present embodiment, the ridge line r of the bent portion 8 is disposed substantially perpendicular to the input line K of the load F acting on the lower part of the front windshield 1 from above.

  The brace 7 formed in the gate shape is connected to the upper ends of the opposing side walls 7a and 7b by an upper surface plate 7c, and the lower ends of the side walls 7a and 7b are bent outward to form flanges 7d, 7e, the flanges 7d and 7e are joined to the shelf 3a of the dash upper panel 3, and the upper surface plate 7c is joined to the member lower cross panel 6.

  With the above configuration, according to the present embodiment, the load F acting on the lower portion of the front windshield 1 from above is input from the upper panel 5 of the cross member 4 and the vehicle front end portions 5b and 6b of the lower panel 6 to the box portion 4a. Furthermore, it is supported by the dash lower panel 2 from the box portion 4 a via the brace 7 and the shelf portion 3 a of the dash upper panel 3.

  At this time, when the load F is less than a predetermined value that normally acts during normal driving, car washing, snow accumulation, etc., the bonding strength of the upper panel 5 and the lower panel 6 and the dash upper panel 3 and the support of the brace 7 Due to the rigidity, the lower part of the front windshield 1 can be reliably supported by the cross member 4 without deformation of the brace 7 as shown in FIGS.

  On the other hand, when an object collides with the front windshield 1 during traveling, for example, it collides with a pedestrian and the head of the pedestrian collides with the lower part of the front windshield 1 and an excessive load F exceeding a predetermined value is applied from above. When inputting, as shown in FIG. 2, the cross member 4 that is cantilevered to the dash upper panel 3 bends in the same direction due to the rotational moment acting in the direction of arrow a with the cantilever support at the rear end as a fulcrum. As shown in FIG. 4, the side walls 7a and 7b of the brace 7 are bent and deformed outward from the bent portion 8 so that the entire brace 7 is crushed and deformed, so that the allowable deformation amount of the lower part of the front windshield 1 is reduced. As a result, the load absorption efficiency of the lower part of the front windshield 1 can be increased.

  That is, according to the front windshield support structure of the present embodiment, the holding rigidity of the front windshield 1 is ensured under normal use conditions, while the brace is in an emergency when an excessive load F is input to the front windshield 1. 7, the lower part of the front windshield 1 sinks downward, and the impact energy at that time can be absorbed efficiently.

  At this time, the support rigidity and the bending rigidity of the front windshield 1 can be arbitrarily controlled by adjusting the number and positions of the braces 7 installed.

  Further, in the present embodiment, the bent portion 8 is formed in the front-rear direction at the middle portion in the vertical direction of the both side walls 7a, 7b of the brace 7, and the ridgeline r is input to the lower portion of the front windshield 1 from the upper side. Since the brace 7 is deformed by the input of the excessive load F, the stress is concentrated substantially evenly on the folded portion 8 because the brace 7 is deformed by the input of the excessive load F. It is performed smoothly and the energy absorption efficiency can be further increased.

  By the way, although this invention was demonstrated taking the example for the said embodiment, various other embodiment can be employ | adopted in the range which is not restricted to this embodiment and does not deviate from the summary of this invention.

It is a perspective view of the vehicle front upper part where an air box is arranged. It is an expanded sectional view along the AA line in FIG. It is an expanded sectional view along the BB line in FIG. It is sectional drawing which shows the deformation | transformation state of the brace with respect to an excessive load.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front windshield 2 Dash lower panel 3 Dash upper panel 3a Shelf part 3b Rear side wall 4 Cross member 4a Box part 5 Upper panel 6 Lower panel 7 Brace 7a, 7b Side wall 8 Folded part r Ridge line F Load K Load input line

Claims (2)

It is connected to the upper end of the dash lower panel that separates the engine room and the vehicle compartment, and is formed into a substantially L-shaped cross section by a shelf extending rearward of the vehicle and a rear side wall standing from the rear end of the shelf. A dash upper panel,
The upper end of the rear side wall is cantilevered so as to cover the upper part of the shelf at a predetermined interval, and each is arranged in the vertical direction at a predetermined interval to form a box part, A cross member comprising an upper panel and a lower panel supporting the lower end portion of the front windshield on the front end portion of the box portion;
The cross member is disposed in a space between the cross member and the shelf, and includes an easily deformable portion that facilitates a crushing deformation in response to a load input exceeding a predetermined value from above, and supports the cross member on the shelf. A front windshield support structure for a vehicle comprising a brace.   The brace is formed of a plate-like member in a front gate shape, and is configured such that both side walls thereof are opposed to each other in the vehicle width direction and the lower ends thereof are joined on the shelf, and the easily deformable portions are formed on the both sides. It is composed of a folded part formed in the front-rear direction at the middle part in the vertical direction of the wall, and the ridgeline of the folded part is arranged substantially perpendicular to the input line of the load acting from above on the lower part of the front windshield. The front windshield support structure for a vehicle according to claim 1.

Images