JP4878846B2 - VEHICLE DOOR STRUCTURE HAVING VEHICLE DOOR GUARD BAR AND MANUFACTURING METHOD FOR VEHICLE DOOR GUARD BAR - Google Patents

Description

The present invention relates to a vehicle door structure provided with a guard bar for a vehicle door that is fixed inside a door of a vehicle such as an automobile, and a method for manufacturing a guard bar for a vehicle door .

As a conventional guard bar for a vehicle door, one disclosed in Patent Document 1 is known. In Patent Document 1, in order to reduce weight and secure a mounting space inside a narrow door, the end of the guard bar is cut obliquely from one flange side to the other flange side, and the end portion is plastic. It is deformed and formed into a predetermined shape.
Japanese Utility Model Publication No. 6-42345

  However, the above-described conventional technique has a problem in that it takes time and effort to manufacture by the amount of processing for cutting off the end, and the manufacturing cost increases.

Therefore, an object of the present invention is to obtain a vehicle door structure including a vehicle door guard bar that can more easily form an end shape, and a method for manufacturing a vehicle door guard bar .

A vehicle door structure according to the present invention includes an elongated upper wall portion and a lower wall portion that are installed with a gap between each other between a pair of elongated side wall portions, and the longitudinal end portions of the upper wall portion and the lower wall portion are provided. The most important feature is that the upper side is formed in a U-shaped cross section.

According to the present invention, the longitudinal ends of the upper wall portion and the lower wall portion are formed in a U-shaped cross section that opens on the upper side so that the longitudinal end portion of the guard bar is thinned in the vehicle width direction. The guard bar can be obtained relatively easily by pressing or the like without performing the process of cutting off the end. Further, according to the present invention, the longitudinal end portions of the upper wall portion and the lower wall portion are U-shaped in cross section with the upper side opened, and the guard bar is inclined along the longitudinal direction. The U-shaped portion of the lower wall portion can be used as a drainage groove for water generated by condensation or rainwater that has entered, and drainage from the inside of the door can be improved .

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

  (First Embodiment) FIG. 1 is a side view showing a part of the internal structure of a vehicle door structure provided with a guard bar according to this embodiment, and FIG. 2 is a cross-sectional view of an intermediate portion in the longitudinal direction of the guard bar (FIG. 3 is a cross-sectional view (cross-sectional view taken along the line BB in FIG. 1) of the end portion in the longitudinal direction of the guard bar. In the figure, UP indicates the upper side in a state fixed to the vehicle.

  As shown in FIG. 1, the guard bar 2 is fixed to the door panel 1 so as to cross between the front edge portion and the rear edge portion of the door. Thereby, at the time of vehicle side collision, the shock absorption property by the vehicle door can be enhanced, and the occupant's protection can be enhanced.

  As shown in FIG. 2, the guard bar 2 has a pair of elongate side wall portions 3 and 4 which are both ends in the vehicle width direction in a state of being fixed to the door panel 1, and an elongate portion extending between the upper portions of the side wall portions 3 and 4. It has an upper wall portion 5U and an elongated lower wall portion 5D laid between the lower portions, and is configured as a member having a substantially rectangular closed cross section.

  However, as shown in FIG. 3, the upper wall portion 5U and the lower wall portion 5D are formed in a U-shaped cross section at both ends in the longitudinal direction so that the guard bar 2 is thinned in the vehicle width direction. In this embodiment, both ends in the longitudinal direction of the guard bar 2 are fixed to the door panel 1 using bolts, nuts 12 or the like. By thus making the both ends in the longitudinal direction thin in the vehicle width direction, these bolts are secured. Space for tools such as nuts, nuts, and wrench for tightening them can be secured.

  Such a structure at both ends in the longitudinal direction can be formed by pressing. For example, first, a plurality of strip-shaped metal members (aluminum alloy, iron-based member, etc.) are joined by welding or the like to form a long member having the cross section of FIG. The guard bar 2 is formed by pressing both end portions in the direction in which the pair of side wall portions 3 and 4 are close to each other and bending the longitudinal end portions of the upper wall portion 5U and the lower wall portion 5D into a U-shaped cross section. Can be obtained. Note that it is preferable that the upper wall portion 5U and the lower wall portion 5D be buckled in an intended direction when pressed, such as slightly bent downward in advance. Further, both end portions in the longitudinal direction of the side wall portions 3, 4, the upper wall portion 5U, and the lower wall portion 5D may be bonded in advance, or may not be bonded or temporarily fixed before pressing. You may make it join later.

  Further, in the present embodiment, the longitudinal end portions of the upper wall portion 5U and the lower wall portion 5D are formed in a U-shaped cross section that opens on the upper side, and as shown in FIG. It fixes to the door panel 1 in the state inclined along the longitudinal direction so that it may become the lower part with respect to a part. By carrying out like this, the U-shaped part of upper wall part 5U and lower wall part 5D can be used as drainage grooves, such as the water which arose by dew condensation, and the rain water which permeated.

  According to the above embodiment, since the longitudinal ends of the upper wall portion 5U and the lower wall portion 5D are U-shaped in cross section, the longitudinal ends of the guard bar 2 are thinned in the vehicle width direction. The guard bar 2 can be obtained relatively easily by pressing or the like without performing the process of cutting off the end portion.

  Further, according to the present embodiment, the longitudinal end portions of the upper wall portion 5U and the lower wall portion 5D are formed in a U-shaped cross section with the upper side opened, and the longitudinal direction so that the rear portion of the guard bar 2 is downward. The U-shaped portion of the upper wall portion 5U and the lower wall portion 5D can be used as a drainage groove for water generated by condensation or rainwater that has entered the door. The drainage from the inside can be improved. In addition, when it fixes with the attitude | position which the front part of the guard bar 2 becomes downward, the drainage property in the front side area | region inside a door can be improved.

  (Second Embodiment) FIG. 4 is a cross-sectional view of a middle portion in the longitudinal direction of a guard bar according to this embodiment, and FIG. 5 is a cross-sectional view of an end portion in the longitudinal direction of the guard bar. In the figure, UP indicates the upper side in a state fixed to the vehicle.

  The guard bar 6 according to the present embodiment includes a pair of side wall portions 7 and 8 disposed on both ends in the vehicle width direction, and an upper wall portion 9U that is installed between the pair of side wall portions 7 and 8 with a gap therebetween. The lower wall portion 9D is integrated. In the present embodiment, both the upper wall portion 9U and the lower wall portion 9D have the same cross-sectional shape. The guard bar 6 is also fixed to the door panel 1 in the same posture as in FIG.

  In manufacturing the guard bar 6, first, a metal material such as an aluminum alloy is extruded to obtain a long member integrated with the pair of side wall portions 7, 8, the upper wall portion 9U, and the lower wall portion 9D. This long member has a cross section (cross section perpendicular to the longitudinal direction) shown in FIG. 4 in almost the entire region along the longitudinal direction.

  Next, the end in the longitudinal direction of the long member is pressed in the direction in which the pair of side wall portions 7 and 8 are close to each other (the direction indicated by the white arrow in FIG. 4), and the upper wall portion 9U and the lower wall A longitudinal end portion of the portion 9D is bent and formed into a U-shaped cross section.

  Here, in this embodiment, as shown in FIG. 4, the upper wall portion 9U and the lower wall portion 9D have cross-sections that are vertically asymmetrical, and both end portions in the longitudinal direction of the long member are pressed. The lower wall portion 9D is bent (buckled) in the intended direction.

  Specifically, for each of the upper wall portion 9U and the lower wall portion 9D, the curvature radius Ru of the upper corner between the upper surface 10 and the inner surfaces of the side wall portions 7 and 8, and the lower surface 11 and the side wall portions 7 and 8 of The upper wall portion 9U and the lower wall portion 9D are bent so as to protrude downward when the longitudinal radius of the long member is pressed at both ends in the longitudinal direction with the radius of curvature Rd of the lower corner portion with the inner surface 13 being larger. I have to.

  Thus, by making the upper wall portion 9U and the lower wall portion 9D have a cross-sectional shape in which the buckling direction is determined, they can be prevented from being deformed in the direction opposite to the intended direction.

  In this embodiment, the upper wall portion 9U and the lower wall portion 9D both have a thickness t1 at the intermediate portion smaller than a thickness t2 at the connection portion with the side wall portions 7 and 8, so 9D is easily bent (buckled).

  According to the above embodiment, the metal material is extruded and the pair of side wall portions 7, 8, the upper wall portion 9U, and the lower wall portion 9D are integrated. Thus, the guard bar can be formed more easily.

  According to the present embodiment, the metal material is extruded to form a pair of side wall portions 7 and 8, and an upper wall portion 9 U and a lower wall portion that are installed between the pair of side wall portions 7 and 8 with a gap therebetween. A long member having a wall portion 9D, and a longitudinal end portion of the long member is pressed in a direction in which the pair of side wall portions 7 and 8 are close to each other to form an upper wall portion 9U and a lower wall portion. Since the end in the longitudinal direction of 9D is bent and formed into a U-shaped cross section, the guard bar 6 can be obtained relatively easily by pressing or the like without performing the process of cutting off the end.

  In addition, according to the present embodiment, when the upper wall portion 9U and the lower wall portion 9D have cross-sections that are vertically asymmetrical, and both end portions in the longitudinal direction of the long member are pressed, the upper wall portion 9U and the lower wall portion 9D. Is bent in the desired direction, the desired end shape can be obtained more easily and more reliably, and the yield can be improved.

  Further, according to the present embodiment, for each of the upper wall portion 9U and the lower wall portion 9D, the curvature radius Ru of the upper corner between the upper surface 10 and the inner surfaces 13 of the side wall portions 7 and 8 is set to the lower surface 11 and the side wall. When the both end portions in the longitudinal direction of the long member are pressed, the upper wall portion and the lower wall portion are formed by a relatively simple configuration in which the radius of curvature Rd of the lower corner portion with the inner surface 13 of the portions 7 and 8 is made larger. In either case, the bottom can be bent more reliably.

  Further, according to the present embodiment, for each of the upper wall portion 9U and the lower wall portion 9D, the thickness t1 of the intermediate portion is made thinner than the thickness t2 of the connection portion with the side wall portions 7 and 8, and therefore the upper wall portion 9U. And lower wall part 9D can be bent more easily.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, as an up-down asymmetric shape that buckles in an intended direction, various forms are conceivable, for example, the upper wall portion and the lower wall portion are bent slightly in a state where the lower portion is convex in advance.

The side view which shows a part of internal structure of the door structure for vehicles which fixed the guard bar concerning embodiment of this invention. Sectional drawing (AA sectional drawing of FIG. 1) of the longitudinal direction intermediate part of the guard bar concerning 1st Embodiment of this invention. Sectional drawing (BB sectional drawing of FIG. 1) of the longitudinal direction edge part of the guard bar concerning 1st Embodiment of this invention. Sectional drawing of the longitudinal direction intermediate part of the guard bar concerning 2nd Embodiment of this invention. Sectional drawing of the longitudinal direction edge part of the guard bar concerning 2nd Embodiment of this invention.

Explanation of symbols

2,6 Guard bar 3, 4, 7, 8 Side wall part 5U, 9U Upper wall part 5D, 9D Lower wall part 10 Upper surface (of upper wall part and lower wall part) 11 Lower surface (of upper wall part and lower wall part) 13 Inner surface (side wall)

Claims (4)

A vehicle door structure provided with a guard bar for a vehicle door fixed inside the vehicle door,
The guard bar includes an elongated upper wall portion and a lower wall portion that are provided with a gap between each other between a pair of elongated side wall portions,
The longitudinal end portions of the upper wall portion and the lower wall portion are formed in a U-shaped cross section that is open on the upper side, and the guard bar is fixed inside the door in an inclined state along the longitudinal direction. A vehicle door structure including a guard bar for a vehicle door. A method of manufacturing a guard bar for a vehicle door that is fixed inside a vehicle door ,
A step of extruding a metal material to obtain a long member having a pair of elongated side walls, and an elongated upper wall and a lower wall that are provided between the pair of sidewalls with a gap therebetween; and
Pressing the longitudinal end portions of the elongate member in a direction in which the pair of side wall portions are close to each other, and bending the longitudinal end portions of the upper wall portion and the lower wall portion into a U-shaped cross section; and With
A cross section in which the upper wall portion and the lower wall portion have cross-sections each having a vertically asymmetrical shape, and the longitudinal ends of the upper wall portion and the lower wall portion are opened on the upper side when both longitudinal ends of the long member are pressed. A method of manufacturing a guard bar for a vehicle door, wherein the guard bar is bent in a U-shape . For each of the upper wall portion and the lower wall portion, the curvature radius of the upper corner of the upper surface and the inner surface of the side wall portion is larger than the curvature radius of the lower corner portion of the lower surface and the inner surface of the side wall portion, 3. The guard bar for a vehicle door according to claim 2 , wherein both the upper wall portion and the lower wall portion are bent so as to protrude downward when both longitudinal ends of the long member are pressed. Method. 4. The manufacture of a guard bar for a vehicle door according to claim 2 or 3 , wherein a thickness of an intermediate portion of each of the upper wall portion and the lower wall portion is made thinner than a thickness of a connection portion with the side wall portion. Method.

Images