JP2018090163A - Instrument panel reinforcement support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an instrument panel reinforcement support structure that can suppress vibration of a steering column and a steering wheel during travelling of a vehicle and during idling stop and yet suppress increase in weight of an instrument panel reinforcement and braces.SOLUTION: Three braces, one end parts of which are fixed to an outer peripheral surface 52 at a substantially same position in a longitudinal direction of an instrument panel reinforcement 10, and in which straight lines extended from a cross-section center B in a transverse direction of the instrument panel reinforcement 10 in the above position are orthogonal to the longitudinal direction in a side view of a vehicle, are fixed to the instrument panel reinforcement 10. The other end part of the first brace 46 is fixed to a front wall of a vehicle interior. The one end parts of the second brace 48 and the third brace 50 are fixed to a front side and a rear side respectively in a vehicle longitudinal direction of the instrument panel reinforcement 10 and the other end parts are fixed to a floor surface of the vehicle interior.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an instrument panel reinforcement support structure.

  In Patent Document 1 below, the inner diameter of a hollow round pipe-shaped instrument panel reinforcement (hereinafter simply referred to as “instrument reinforcement”) extending in the vehicle width direction is changed without changing its outer diameter. Instrument panel reinforcement with partly increased wall thickness, or partially improved rigidity by providing reinforcing ribs only on the inner diameter part, vehicle front wall and vehicle floor and instrument panel reinforcement An instrument panel reinforcement support structure is disclosed in which the two are connected by braces. According to this structure, the torsional rigidity of the instrument panel reinforcement can be improved without changing the dimensions of the braces that support the instrument panel reinforcement.

JP 2010-126140 A

  By the way, in order to suppress vibrations of the steering column and the steering wheel when the vehicle is running or when idling is stopped, it is necessary to improve the support rigidity of the steering column. In particular, in order to improve the support rigidity of the steering column and steering wheel against vibration in the vertical direction of the vehicle, it is important to suppress the rotational displacement of the steering column by an instrument panel reinforcement that supports the steering column.

  However, in the case of the instrument panel reinforcement support structure disclosed in Patent Document 1, a bending moment acts on the brace due to the torsional moment of the instrument panel reinforcement caused by suppressing the rotational displacement of the steering column. For this reason, there is a disadvantage that the size and weight of the member are increased in order to improve the bending rigidity of the brace. In addition, by improving the rigidity of the instrument panel reinforcement, the rotational displacement of the steering column can be suppressed directly, but the rigidity of the left and right front pillars to which the instrument panel reinforcement is attached is also improved. This also has the disadvantage of increasing the dimensions and weight of the front pillar members.

  In view of the above facts, the present invention provides an instrument panel reinforcement support structure that suppresses vibrations of the steering column and steering wheel when the vehicle is running or when idling is stopped, and that can suppress an increase in the weight of the instrument panel reinforcement and the brace. For the purpose.

  An instrument panel reinforcement support structure according to a first aspect of the present invention is an instrument that is disposed with a vehicle width direction as a longitudinal direction and supports a steering column that is disposed in a vehicle body with a vehicle longitudinal direction as an axial direction in a plan view of the vehicle. A panel reinforcement and one end of which is fixed to the outer peripheral surface of the instrument panel reinforcement, and a straight line extending from the cross-sectional center in the short direction of the instrument panel reinforcement at the fixed position to the fixed position Is perpendicular to the longitudinal direction when viewed from the side of the vehicle, and the other end is fixed to the front wall of the passenger compartment, and one end is substantially the longitudinal direction of the first brace on the outer peripheral surface of the instrument panel reinforcement. In front of the instrument panel reinforcement in the same position A straight line that is fixed to the front side in the direction and extends from the cross-sectional center in the short direction of the instrument panel reinforcement at the fixed position to the fixed position is orthogonal to the longitudinal direction in a vehicle side view, and the other end is A second brace fixed to the floor of the passenger compartment, and one end of the instrument panel reinforcement at the substantially same position as the first brace in the longitudinal direction on the outer peripheral surface of the instrument panel reinforcement. A straight line extending from the cross-sectional center in the short direction of the instrument panel reinforcement at the fixed position to the fixed position is orthogonal to the longitudinal direction in a side view of the vehicle, and the other end is the vehicle interior And a third brace fixed to the floor surface.

  In the instrument panel reinforcement support structure according to the present invention, the instrument panel reinforcement is supported from three directions by three braces such as a first brace, a second brace, and a third brace. This effectively restrains the vertical displacement, longitudinal displacement and rotational displacement of the instrument panel reinforcement caused by the vibration of the steering column when the vehicle is running or when idling is stopped.

  Moreover, in this invention, the brace is being fixed to the position where the straight line extended from the cross-sectional center of the instrument panel reinforcement to the outer peripheral part and the straight line parallel to the longitudinal direction of the brace in the vehicle side view are orthogonal to each other. Thereby, when the instrument panel reinforcement is rotationally displaced, only the axial force of compression or tension acts on the brace, and the bending moment does not act. For this reason, the vibration of the steering column and the steering wheel can be suppressed without improving the torsional rigidity of the instrument panel reinforcement and the bending rigidity of the brace, so that the weight increase of the instrument panel reinforcement and the brace is suppressed. The

  As described above, the instrument panel reinforcement support structure according to the present invention can suppress the vibration of the steering column and the steering wheel when the vehicle is running or when idling is stopped, and can also suppress the weight increase of the instrument panel reinforcement and the brace. It has an excellent effect.

It is the perspective view which looked at the instrument panel reinforcement support structure concerning this embodiment from the vehicles back and forth direction back side. It is sectional drawing along the AA line of the instrument panel reinforcement support structure shown by FIG. It is the schematic side view which looked at the balance state of the force and moment in the case of restraining the rotational displacement of the instrument panel reinforcement shown by FIG. 1 from the vehicle side part. It is the schematic perspective view which looked at the instrument panel reinforcement support structure which concerns on the 1st modification of this embodiment from the vehicle rear side. It is the schematic side view which looked at the instrument panel reinforcement support structure which concerns on the 2nd modification of this embodiment from the vehicle side part. It is the schematic side view which looked at the instrument panel reinforcement support structure which concerns on the 3rd modification of this embodiment from the vehicle side part.

  Hereinafter, an embodiment of an instrument panel reinforcement support structure according to the present invention will be described with reference to FIGS. In the following drawings, an arrow FR appropriately shown indicates the front side in the vehicle longitudinal direction, an arrow UP indicates the vehicle vertical direction upper side, and an arrow IN indicates the vehicle width direction inner side.

  As shown in FIG. 1, an instrument panel reinforcement (hereinafter simply referred to as “instrument reinforcement”) 10 is provided on the front side in the vehicle front-rear direction in the interior of the automobile. The instrument panel reinforcement 10 is arranged with the vehicle width direction as a longitudinal direction, and is formed of a metal hollow pipe-shaped member.

  The instrument panel reinforcement 10 according to the present embodiment includes a first shaft portion 12 extending in the vehicle width direction from an end portion on the driver's seat side toward the passenger seat side, the first shaft portion 12, and an assistant. The second shaft portion 14 is configured to extend in the vehicle width direction toward the seat side end. The outer diameter of the first shaft portion 12 is set to be larger than the outer diameter of the second shaft portion 14, whereby the rigidity of the first shaft portion 12 is set to be relatively higher than the rigidity of the second shaft portion 14. Has been. A plate-like first extension 18 is vertically connected to a first end 16 that is an end of the instrument panel reinforcement 10 on the driver's seat side. The first end portion 16 is fixed to a first front pillar 20 (see a two-dot chain line) provided on the outer side in the vehicle width direction of the instrument panel reinforcement 10 via a first extension 18.

  Similarly, the second extension 24 is also vertically connected to the second end 22 which is the end on the passenger seat side of the instrument panel reinforcement 10. The second end portion 22 is provided on the outer side in the vehicle width direction of the instrument panel reinforcement 10 via the second extension 24, and is fixed to the second front pillar 26 (see a two-dot chain line).

  A center tab race 28 and a cowl brace 30 are provided in the middle portion in the longitudinal direction of the second shaft portion 14 of the instrument panel reinforcement 10. The center race 28 is arranged with the vehicle vertical direction as the longitudinal direction. An upper end portion 32 of the center tab race 28 that is one end portion in the longitudinal direction is fixed to the outer peripheral surface of the instrument panel reinforcement 10, and a lower end portion 34 of the center tab race 28 that is the other end portion in the longitudinal direction is a vehicle floor portion 36. It is fixed to the side wall of a tunnel portion (not shown) formed in the above. The centablace 28 is formed of a metal plate material.

  The cowl brace 30 is arranged with the longitudinal direction of the vehicle. The rear end portion 30A of the cowl brace 30 serving as one end portion in the longitudinal direction is fixed to the outer peripheral surface of the instrument panel reinforcement 10 at a position close to the position where the upper end portion 32 of the centab race 28 is fixed in the vehicle width direction. Yes. A front end 30B of the cowl brace 30 that is the other end in the longitudinal direction is fixed to a rear wall of the cowl (not shown). The cowl brace 30 is formed by pressing a metal plate material of the same type as the above-mentioned centablace 28.

  A steering column 38 is supported on the vehicle lower side of the middle portion of the first shaft portion 12 of the instrument panel reinforcement 10 in the longitudinal direction. A steering column 38 schematically showing a part of an outline using a two-dot chain line includes a cylindrical column tube and a steering main shaft.

  The axis A of the steering main shaft is inclined upward in the vehicle vertical direction from the front side in the vehicle front-rear direction to the rear side in a side view of the vehicle. The steering column 38 is attached to the instrument panel reinforcement 10 via a steering support 42. A steering wheel 44 is fastened and fixed to a rear end portion of the steering main shaft by a lock nut (not shown).

  Here, in the present embodiment, a first brace for supporting the instrument panel reinforcement 10 on the vehicle body at substantially the same position in the longitudinal direction near the boundary between the first shaft portion 12 and the second shaft portion 14 of the instrument panel reinforcement 10. The three braces 46, the second brace 48 and the third brace 50 are fixed along the outer peripheral surface 52 of the instrument panel reinforcement 10. Here, “substantially the same” includes not only the case where the instrument panel reinforcement 10 is fixed on substantially the same cross section in the longitudinal direction but also the case where it can be regarded as substantially the same when viewed from the full length of the instrument panel reinforcement 10.

  The first brace 46 is made of a metal rod-shaped member. The first brace 46 is one end portion, and extends from the first mounting portion 54 having a mounting surface to the instrument panel reinforcement 10 with the front side in the vehicle front-rear direction and the lower side in the vehicle vertical direction as the longitudinal direction. The first attachment portion 54 is fixed to the instrument panel reinforcement 10 such that the center point in the circumferential direction of the attachment portion to the instrument panel reinforcement 10 is the first position 56. On the other hand, the first end 58 which is the other end of the first brace 46 is crushed and fastened to a front wall (not shown) such as a dash panel with bolts and nuts.

  The first brace 46 is a straight line (tangent line) that passes through the first position 56 and is parallel to the longitudinal direction of the first brace 46 when viewed from the side of the vehicle, and a straight line that extends from the cross-sectional center B of the instrument panel reinforcement 10 to the first position 56. It is being fixed to the instrument panel reinforcement 10 so that the 1st center line 62 may orthogonally cross. For this reason, the first brace 46 is fixed to the instrument panel reinforcement 10 by adjusting the mounting position of the first brace 46 and the length of the first brace 46.

  The 2nd brace 48 is comprised with the metal rod-shaped member. The second brace 48 is one end portion, and extends from the second attachment portion 64 having an attachment surface to the instrument panel reinforcement 10 with the front side in the vehicle front-rear direction and the lower side in the vehicle vertical direction as the longitudinal direction. The second attachment portion 64 is fixed to the instrument panel reinforcement 10 such that the center point in the circumferential direction of the attachment portion to the instrument panel reinforcement 10 is the second position 66. On the other hand, the second end portion 68, which is the other end portion of the second brace 48, is crushed and fastened to the side wall of a tunnel portion (not shown) formed on the vehicle floor portion 36 by bolts and nuts.

  The second brace 48 is a straight line (tangent line) passing through the second position 66 and parallel to the longitudinal direction of the second brace 48 in the vehicle side view and a straight line extending from the cross-sectional center B of the instrument panel reinforcement 10 to the second position 66. It is being fixed to the instrument panel reinforcement 10 so that the 2nd center line 70 may orthogonally cross.

  The 3rd brace 50 is comprised by the metal rod-shaped member. The third brace 50 is one end portion, and extends from the third attachment portion 72 that is an attachment surface to the instrument panel reinforcement 10 with the vehicle longitudinal direction rear side and the vehicle vertical direction lower side as the longitudinal direction. The third attachment portion 72 is fixed to the instrument panel reinforcement 10 such that the center point in the circumferential direction of the attachment portion to the instrument panel reinforcement 10 is the third position 74. On the other hand, the third end portion 76 which is the other end portion of the third brace 50 is crushed and fastened to the side wall of a tunnel portion (not shown) formed on the vehicle floor portion 36 by bolts and nuts.

  The third brace 50 is a straight line (tangent line) passing through the third position 74 and parallel to the longitudinal direction of the third brace 50 in a side view of the vehicle and a straight line extending from the cross-sectional center B of the instrument panel reinforcement 10 to the third position 68. It is fixed to the instrument panel reinforcement 10 so that the third center line 78 is orthogonal.

  As shown in FIG. 2, the third brace 46, the second brace 48, and the outer periphery of the instrument panel reinforcement 10 are equally divided by the first center line 62, the second center line 70, and the third center line 78. And the one end part of the 3rd brace 50 is being fixed to the outer peripheral surface of the instrument panel reinforcement 10, respectively. That is, the angle formed by the first center line 62 and the second center line 70 and the angle formed by the first center line 62 and the third center line 78 are equal to 120 degrees. The angle formed by the second center line 70 and the third center line 78 is also 120 degrees, and the angle formed by the first center line 62 and the second center line 70 is formed by the first center line 62 and the third center line 78. Is equal to the angle.

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

  In the instrument panel reinforcement support structure according to the present embodiment, the instrument panel reinforcement 10 is supported by the first brace 46, the second brace 48, and the third brace 50 from three directions. Thereby, the vertical displacement, the longitudinal displacement and the rotational displacement of the instrument panel reinforcement 10 caused by the vibration of the steering column 38 when the vehicle is running or when idling is stopped are effectively restrained.

  In a general vehicle configuration, since there is a certain distance between the cross-sectional center B of the instrument panel reinforcement 10 and the steering wheel 44, the instrument panel reinforcement 10 generated by vibration of the steering column 38 when the vehicle is running or when idling is stopped. It is more important to suppress the rotational displacement than to suppress the vertical displacement and the longitudinal displacement. In the present embodiment, the first brace 46, the second brace 48, and the third brace 50 are arranged so that their longitudinal directions are orthogonal to the first center line 62, the second center line 70, and the third center line 78, respectively. It is fixed to the outer peripheral surface of the reinforcement 10. As a result, as shown in FIG. 3A, when the instrument panel reinforcement 10 is rotationally displaced, the first brace 46, the second brace 48, and the third brace 50 are compressed or pulled in their longitudinal direction. Only the axial force acts, and no bending moment acts.

  Therefore, it is possible to ensure the support rigidity required for the instrument panel reinforcement 10 without improving the torsional rigidity of the instrument panel reinforcement 10 and the bending rigidity of the first brace 46, the second brace 48, and the third brace 50. . Thereby, the increase in the weight of the instrument panel reinforcement 10, the first brace 46, the second brace 48, and the third brace 50 is also suppressed.

  Since the first brace 46, the second brace 48, and the third brace 50 do not need to improve the bending rigidity, they can be formed of light bar-like members. For this reason, the first brace 46 fixed to the front wall of the vehicle is easily buckled and deformed by a compressive load at the time of a frontal collision. Thereby, since collision energy is absorbed by the 1st brace 46, a passenger | crew's possibility of injury at the time of a frontal collision can be reduced.

  Further, in the present embodiment, the first brace 46, the second brace 48, and the outer periphery of the instrument panel reinforcement 10 are equally divided by the first center line 62, the second center line 70, and the third center line 78. One end of the third brace 50 is fixed to the outer peripheral surface of the instrument panel reinforcement 10. Thereby, as shown in FIG. 3B, when the instrument panel reinforcement 10 is displaced up and down and back and forth, a load (reaction force) is applied to the first brace 46, the second brace 48, and the third brace 50. Acts in a distributed manner. Further, only the axial force of compression or tension acts mainly on the first brace 46, the second brace 48 and the third brace 50 in the longitudinal direction, and the bending moment is suppressed. Thereby, the weight increase by the board thickness increase etc. of the 1st brace 46, the 2nd brace 48, and the 3rd brace 50 is suppressed.

  From these facts, according to the instrument panel reinforcement support structure according to the present embodiment, the vibration of the steering column 38 and the steering wheel 44 when the vehicle is running or when idling is stopped, and the instrument panel reinforcement 10 and the first brace 46 are also suppressed. The weight increase of the second brace 48 and the third brace 50 can be suppressed.

(First Modification of Embodiment)
Next, the 1st modification of embodiment of the instrument panel reinforcement support structure which concerns on this invention is demonstrated using FIG. In addition, about the same component as embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 4, in the instrument panel reinforcement support structure according to this modification, the basic configuration is substantially the same as that of the instrument panel reinforcement support structure described in the above-described embodiment. That is, the instrument panel reinforcement support structure according to this modification includes the instrument panel reinforcement 10, the first brace 46, the second brace 48, and the third brace 50.

  In this modification, the second brace 48 and the third brace 50 are respectively fixed to the outer peripheral surfaces of the instrument panel reinforcement 10 on both sides in the vehicle width direction of the steering main shaft at substantially the same position in the longitudinal direction of the instrument panel reinforcement 10. ing. On the other hand, as in the present embodiment, the longitudinal direction of the first brace 46, the second brace 48, and the third brace 50 is orthogonal to the first center line 62, the second center line 70, and the third center line 78, respectively. To be fixed.

  According to the modified example, as in the present embodiment, the instrument panel reinforcement 10 is improved without improving the torsional rigidity of the instrument panel reinforcement 10 and the bending rigidity of the first brace 46, the second brace 48, and the third brace 50. The required support rigidity can be ensured. Thereby, the increase in the weight of the instrument panel reinforcement 10, the first brace 46, the second brace 48, and the third brace 50 is also suppressed.

(Second Modification of Embodiment)
Next, the 2nd modification of embodiment of the instrument panel reinforcement support structure which concerns on this invention is demonstrated using FIG. In addition, about the same component as embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 5, in the instrument panel reinforcement support structure according to this modification, the basic configuration is substantially the same as the instrument panel reinforcement support structure described in the above-described embodiment. That is, the instrument panel reinforcement support structure according to this modification includes the instrument panel reinforcement 10, the first brace 46, the second brace 48, and the third brace 50.

  In the present modification, the second brace 48 and the third brace 50 are fixed along the outer peripheral surface of the instrument panel reinforcement 10 via a bracket 80 attached thereto. A second center line 70 and a third center line which are straight lines extending from the second position 66 and the third position 74 which are the mounting positions of the second brace 48 and the third brace 50 to the bracket 80 to the cross-sectional center B of the instrument panel reinforcement 10. The center line 78 and the longitudinal directions of the second brace 48 and the third brace 50 are orthogonal to each other. The second brace 48 and the third brace 50 are fixed to the side wall of a tunnel portion (not shown) formed on the vehicle floor portion 36 at the same position.

  According to the above modification, the first brace 46, the second brace 48, and the third brace 50 have the longitudinal directions of the first center line 62, the second center line 70, and the third center line as in the present embodiment. 78 and are fixed so as to be orthogonal to each other. Therefore, it is possible to ensure the support rigidity required for the instrument panel reinforcement 10 without improving the torsional rigidity of the instrument panel reinforcement 10 and the bending rigidity of the first brace 46, the second brace 48, and the third brace 50. . Thereby, the increase in the weight of the instrument panel reinforcement 10, the first brace 46, the second brace 48, and the third brace 50 is also suppressed.

  Furthermore, according to the modified example, the second brace 48 and the third brace 50 are attached to the instrument panel reinforcement 10 via the bracket 80, so that the second brace 48 and the third brace 50 are the same without crossing each other. It can be fixed to the vehicle floor 36 at a position. Thereby, since the 2nd brace 48 and the 3rd brace 50 can be attached to the vehicle floor part 36 with one fastener, the number of parts and work man-hours can be reduced.

(Third Modification of Embodiment)
Next, the 3rd modification of embodiment of the instrument panel reinforcement support structure which concerns on this invention is demonstrated using FIG. In addition, about the same component as embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  In the above-described embodiment, the third brace 46, the second brace 48, and the second brace 46 are divided so that the outer periphery of the instrument panel reinforcement 10 is equally divided by the first center line 62, the second center line 70, and the third center line 78. Whereas the three braces 50 are provided, in this modification, as shown in FIG. 6, the outer periphery of the instrument reinforcement 10 is strictly limited by the first center line 62, the second center line 70, and the third center line 78. It is set as the structure which is not divided into 3 equally. Further, since the outer periphery is not strictly divided into three equal parts, the second brace 48 and the third brace 50 are fixed to the side wall of a tunnel portion (not shown) formed on the vehicle floor portion 36 at the same position without intersecting. .

  According to the above modification, the first brace 46, the second brace 48, and the third brace 50 have the longitudinal directions of the first center line 62, the second center line 70, and the third center line as in the present embodiment. 78 and are fixed so as to be orthogonal to each other. For this reason, even if there is a difference in the load borne by the three braces, the torsional rigidity of the instrument panel reinforcement 10 and the bending rigidity of the first brace 46, the second brace 48, and the third brace 50 are not improved. The support rigidity required for the instrument panel reinforcement 10 can be ensured. Thereby, the increase in the weight of the instrument panel reinforcement 10, the first brace 46, the second brace 48, and the third brace 50 is also suppressed.

  Furthermore, according to the modified example, the second brace 48 and the third brace 50 can be fixed to the vehicle floor 36 at the same position without intersecting. For this reason, the 2nd brace 48 and the 3rd brace 50 can be attached to the vehicle floor part 36 with one fastener, and a number of parts and work man-hours can be reduced.

  In addition, in this embodiment mentioned above, the instrument panel reinforcement 10 is comprised by the hollow pipe-shaped member, However, It is not restricted to this, You may use the member whose cross-sectional shape is a polygon. If the straight line extended from the cross-sectional center B to the brace attachment position and the longitudinal direction of the brace are orthogonal, the same effect as the present embodiment can be obtained.

  Moreover, in this embodiment mentioned above, although the number of braces was set to three, you may fix not only this but four or more braces. If the first brace, the second brace, and the third brace according to the present embodiment are configured by three braces among four or more braces, the load can be dispersed by increasing the number of braces besides these. it can. Thereby, the support rigidity requested | required of the instrument panel reinforcement 10 can further be improved.

10 Instrument Panel Reinforcement (Instrument Reinforcement)
36 Vehicle floor part 38 Steering column 46 1st brace 48 2nd brace 50 3rd brace 54 1st attaching part (one end part)
58 First end (other end)
B Cross-sectional center 64 Second mounting part (one end part)
68 Second end (other end)
72 Third mounting portion (one end)
76 Third end (other end)

Claims (1)

An instrument panel reinforcement that is disposed with the vehicle width direction as a longitudinal direction and supports a steering column that is disposed in the vehicle body with the vehicle longitudinal direction as an axial direction in plan view of the vehicle;
One end is fixed to the outer peripheral surface of the instrument panel reinforcement, and a straight line extending from the cross-sectional center in the short direction of the instrument panel reinforcement at the fixed position to the fixed position is a vehicle side view. A first brace orthogonal to the longitudinal direction and having the other end fixed to the front wall of the passenger compartment;
One end of the instrument panel reinforcement is fixed to the front side in the vehicle front-rear direction of the instrument panel reinforcement at substantially the same position as the first brace in the longitudinal direction on the outer peripheral surface of the instrument panel reinforcement, and the instrument panel at the fixed position A second brace in which a straight line extending from the cross-sectional center in the short direction of the reinforcement to the fixed position is perpendicular to the longitudinal direction in the vehicle side view, and the other end is fixed to the passenger compartment floor surface;
One end of the instrument panel reinforcement is fixed to the rear side in the vehicle front-rear direction of the instrument panel reinforcement at substantially the same position as the first brace in the longitudinal direction on the outer peripheral surface of the instrument panel reinforcement, and the instrument at the fixed position A third brace in which a straight line extending from the cross-sectional center in the short direction of the panel reinforcement to the fixed position is orthogonal to the longitudinal direction in the vehicle side view, and the other end is fixed to the passenger compartment floor surface;
Instrument panel reinforcement support structure with