JP4355905B2 - Door frame - Google Patents

Description

  The present invention relates to a door frame with increased rigidity.

  As shown in FIGS. 8 to 10, the door frame 1 is formed by connecting a lower frame (sash) 2 and a center pillar (see FIG. 1) for guiding the raising and lowering of the window glass, and a lower frame 2 and the center pillar separated from each other. It has a main frame 3 that defines the top dead center of the glass, and a mirror bracket 4 that is disposed between the front end of the main frame 3 and the lower frame 2.

The lower frame 2 has a substantially U-shaped cross section, the mirror bracket 4 has a substantially L-shaped cross section, and the tip edge 5 of the bottom side is spot welded to the indoor side piece 6 of the lower frame 2.
The upright piece 7 of the mirror bracket 4 is welded to the indoor side and the vehicle outer side of the side surface of the main frame 3 by arc welding.

The door panel 8 has an upper edge portion disposed along the belt line 11 and is fixed to the lower frame 2, the main frame 3, the mirror bracket 4, and the center pillar.
The upright portion 9 of the mirror bracket 4 is used for mounting a seal member that seals rainwater from the mirror mounting portion.

JP-A-9-71184 Japanese Patent Laid-Open No. 11-129758 Japanese Patent Laid-Open No. 11-129761 JP-A-11-342745 Japanese Utility Model Publication No. 3-32408 JP-A-7-329572 JP-A-7-251635 Japanese Utility Model Publication No. 6-34165

  When the vehicle travels at a high speed, the negative pressure generated by the air flow along the door frame 1 and the door panel 8 creates a force for sucking the door frame 1 out of the vehicle around the belt line 11. As a result, a force is generated to fold the door frame outward on the belt line l-l.

  In order to cope with this force, the rigidity of the lower frame 2 and the main frame 3 is increased, but the rigidity of the mirror bracket is not increased due to restrictions imposed by its shape. For this reason, up to now, the mirror bracket has been increased in thickness and a high-strength steel material has been used, but this is not a preferable means in terms of cost and weight increase, and an improvement is desired.

  As shown in FIG. 9, the flat bottom extending in the vertical direction of the mirror bracket 4 is provided with an upright portion 9 because of the necessity of sealing, and creates a step opening in the front-rear direction and the indoor side. This step is also a cause of deformation of the mirror bracket due to the suction force to the outside of the vehicle generated at the door during high speed running.

  In addition, the tip edge 5 of the mirror bracket 4 is spot-welded to the indoor side piece 6 of the lower frame 2, but this configuration does not contribute to the resistance to the aforementioned suction force.

  Therefore, this invention makes it the subject which should be solved to eliminate the malfunction of the prior art mentioned above.

  In order to solve the above-described problems, the present invention basically has a substantially U-shaped cross section of the mirror bracket, and the bottom side thereof is positioned further indoors than the indoor side piece of the lower frame. A technical means for fixing the wall portion to the connecting wall portion of the lower frame is used.

  This technical means is applied to the inner panel of the center pillar, and can increase the rigidity of the inner panel having a substantially U-shaped cross section. In other words, the bottom of the inner panel having a substantially U-shaped cross section is configured to extend so as to gradually change toward the indoor side.

According to the present invention, a lower frame having a substantially U-shaped cross section for guiding the raising and lowering of the wind glass and having a pair of side pieces and a connecting wall portion connecting the side pieces, and a top dead center of the wind glass are defined. In addition, a door frame having a main frame having a hollow portion and coupled to the lower frame, and a mirror bracket disposed between the lower frame and the main frame, the mirror bracket extends from the bottom side and both sides thereof to the outside of the vehicle. It has a substantially U-shaped cross section consisting of a pair of standing upright pieces that extend, and the bottom is located across the entire area between the upright pieces of the pair and is located on the indoor side from the indoor side piece of the lower frame. It is secured to the connecting wall portion, Doafu other upright piece which is fixed to the main frame at the side wall portion of and at least a hollow portion extending in the vehicle outer side along the side wall portion of the hollow portion of the main frame Over-time is provided.

  The door frame using the improved mirror bracket and / or center pillar increases its rigidity, and can sufficiently resist the folding force of the door frame to the outdoor side when the vehicle is traveling at high speed. If the rigidity required for the mirror bracket is a constant value, the plate thickness can be reduced to reduce the weight of the vehicle.

  If the mirror bracket and / or the center pillar having the same thickness as the conventional one are configured, the rigidity of the mirror bracket according to the present invention can be remarkably increased as compared with the conventional one.

As shown in FIGS. 1 to 3, the door frame 21 according to a preferred embodiment of the present invention has a lower frame (sash) 22 and a center pillar 23 which are spaced apart and guide the raising and lowering of the window glass. The frame 22 and the center pillar 23 are coupled by the main frame 24. The main frame 24 defines the top dead center of the windshield. Mirror bracket 25 is disposed between the front and b A frame 22 of the main frame 24. Reference numeral 8 denotes a door panel.

The mirror bracket 25 extends from the main frame 24 to the lower side of the door panel 8 as a single plate. ll indicates a belt line at the upper end of the door panel 8.
The cross-sectional shape of the mirror bracket 25 will be described with reference to FIG. The mirror bracket 25 is a pressed product of a steel plate having a substantially U-shaped cross section and comprising a base 26 and a pair of upstanding pieces 27 and 28 facing each other. The upright pieces 27 and 28 extend in the vehicle width direction.

The lower frame (sash) 22 has a substantially U-shaped cross section and has an indoor side piece 29, and the connecting wall portion 30 faces forward.
The main frame 24 includes an outer panel 31 and an inner panel 32, and has a hollow portion 33 on the indoor side of the inner panel 32. The hollow portion 33 is located on the indoor side from the indoor side piece 29.

  The bottom side 26 of the mirror bracket 25 is located on the indoor side with respect to the indoor side piece 29, and one standing piece 27 extends to the vehicle outer side along the connecting wall part 30 of the lower frame 22, and is spotted on the connecting wall part 30. Welded.

  The other upright piece 28 of the mirror bracket 25 extends to the vehicle outer side along the side wall portion of the hollow portion 33 of the main frame 24, and the tip edge thereof is arc-welded to the vehicle outer horizontal piece of the inner panel 32. The upright piece 28 is also arc welded to the side wall portion of the hollow portion 33.

  4 indicates a position along the indoor side piece 29, and this position is the position of the bottom side of the conventional mirror bracket shown in FIG. 10, but the bottom side 26 of the mirror bracket 25 according to the present invention is from this line. It has moved greatly indoors. For this reason, the cross-sectional shape of the mirror bracket 25 is configured such that the base 26 deeply squeezed into the indoor side and the pair of upright pieces 27 and 28 extending to the vehicle outer side increase the rigidity of the mirror bracket 25.

As shown in FIGS. 1 and 3, the mirror bracket 25 extends as a single plate below the door panel 8. Such a configuration of the seamless mirror bracket 25 helps to increase its rigidity.
As shown in FIGS. 5 and 6, a projecting member 34 having a channel cross section is welded to the base 26, and rainwater can be sealed from the mirror mounting portion.

FIG. 7 shows an example in which the deep drawing means for the bottom 26 to the indoor side used for the mirror bracket 25 is applied to the center pillar 23.
The center pillar 23 has an outer panel 37 having a groove 36 for guiding the raising and lowering of the window glass 35, a base piece 38 along a horizontal piece of the outer panel 37, and a substantially U-shaped cross section deeply drawn from the base piece 38 to the indoor side. And an inner panel 40 having a reinforced portion 39 in the form of a ring. The inner panel 40 can be opposed to a vehicle body 41 via weatherstrips 42 and 43.

  The outer panel 37 and the inner panel 40 are integrally extended downward to serve as a lock reinforcement. In the vicinity of the belt line, the expansion of the cross section is obtained by deep-drawing the reinforcing portion 39 having a substantially U-shaped cross section gradually. With this configuration, it is possible to share the lock reinforcement with the center pillar 23, and deep drawing by gradual change increases the rigidity of the center pillar 23.

It is a front view of an example door frame of the present invention. It is a front view of the mirror attachment part of the door frame of an example of this invention. It is sectional drawing seen from the arrow III-III of FIG. It is sectional drawing seen from the arrow IV-IV of FIG. It is a front view of the mirror attachment part of the door frame of another example of this invention. It is sectional drawing seen from the arrow VI-VI of FIG. It is sectional drawing of a center pillar. It is a front view of the mirror attachment part of the conventional door frame. It is sectional drawing seen from the arrow IX-IX of FIG. It is sectional drawing seen from the arrow XX of FIG.

Explanation of symbols

8 Door panel 21 Door frame 22 Lower frame 23 Center pillar 24 Main frame 25 Mirror bracket 26 Bottom 27, 28 Standing piece 29 Indoor side piece 30 Connecting wall part 31, 37 Outer panel 32, 40 Inner panel 33 Hollow part 34 Projection member 35 Window glass 36 groove 38 base piece 39 reinforcing part

Claims (4)

A lower frame having a substantially U-shaped cross-section to guide the raising and lowering of the wind glass and having a pair of side pieces and a connecting wall portion connecting the side pieces, and defining a top dead center of the wind glass and having a hollow portion. And a door frame having a main frame coupled to the lower frame, and a mirror bracket disposed between the lower frame and the main frame,
The mirror bracket has a substantially U-shaped cross section consisting of a pair of spaced upright pieces extending from the bottom side and both sides of the mirror bracket to the outside of the vehicle,
The base is located on the indoor side of the lower frame indoor side piece across the entire area between the pair of upright pieces, one upright piece is fixed to the connecting wall portion of the lower frame, and the other upright piece is the side wall of the hollow portion of the main frame A door frame that extends to the outside of the vehicle along the portion and is fixed to the main frame at least at the side wall of the hollow portion . The door frame according to claim 1, further comprising a projecting member that is fixed to the bottom side of the mirror bracket and protrudes toward the vehicle outer side between the lower frame and the main frame.   Further, the inner panel includes an outer panel having a center pillar, the center pillar having a groove for guiding the raising and lowering of the window glass, and an inner panel having a reinforcing portion fixed to the outer panel and extending to the indoor side. The door frame according to claim 1, wherein the door frame is formed in a substantially U-shaped cross section extending in a direction substantially orthogonal to the groove of the outer panel.   The door frame according to claim 3, wherein the depth of the reinforcing portion is changed by gradual change.

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