JP4973030B2 - Rear roof rail structure in a back door vehicle - Google Patents

Description

  The present invention relates to a rear roof rail portion structure in a back door vehicle.

  In general, the rigidity of the back door opening and the torsional rigidity of the back door vehicle is one of important indexes in sound vibration, steering stability, and vehicle durability. Therefore, it is very important to increase the rigidity around the back door opening which has a great influence on the rigidity of the back door opening and the torsional rigidity of the vehicle body. However, in order to increase the rigidity, there is a problem that it is against the request for weight reduction of the vehicle body.

  Therefore, as a solution to the above-mentioned problems, in the rear roof rail structure in the back door vehicle, the left and right side ends of the rear roof rail are joined to the upper rear side ends of the left and right braces, and the side portions of the rear roof rail are near the side ends. In the back door vehicle to which the reinforcement is attached, a pair of left and right reinforcements extending from the upper rear side of the left and right body side outers to the left and right ends of the rear roof rail and reaching the rear roof rail are applied to the rear roof rail and the left and right body side outers. There has been proposed a structure in which each is joined and a back door hinge is attached to the reinforcement (for example, see Patent Document 1).

In other words, according to this conventional example, by using the reinforcement rear roof rail having a size extending from the side end portion of the rear roof rail to the upper rear end portion of the body side outer panel, it is transmitted to the back door hinge without setting the upper roof rail. Since the external force is transmitted to the rear pillar, there is an advantage that the support rigidity of the back door can be improved and the weight of the vehicle body can be reduced and the manufacturing cost can be reduced.
JP-A-1-182176

  However, in the above-described conventional example, as described above, by eliminating the upper roof rail, the rigidity between the left and right reinforcements is locally reduced at the joint between the body side outer and the reinforcement, As a result, there is a problem that sufficient back door opening rigidity and vehicle body torsional rigidity cannot be obtained.

  That is, in order to prevent the deformation of the back door opening due to the torsional input of the vehicle body, it is essential to increase the rigidity of each corner of the opening. However, the rigidity of the reinforcement, particularly the bending rigidity in the vertical direction is locally When the torsional input is reduced, when the torsional input is applied to the vehicle body, the stress concentrates on the same part and bends, which may cause deformation of the back door opening.

  The present invention has been made paying attention to the conventional problems as described above, and in a back door vehicle capable of obtaining sufficient rigidity of the back door opening and torsional rigidity of the vehicle body while omitting the upper roof rail. It aims at providing a rear roof rail part structure.

In order to achieve the above-mentioned object, the rear roof rail structure in the back door vehicle according to claim 1 of the present application is such that the left and right side ends of the rear roof rail are joined to the upper ends of the left and right braces, and the left and right sides of the rear roof rail. A pair of left and right left and right sides of the left and right sides of the left and right sides of the left and right sides of the body outer outer side of the left and right sides of the left and right sides of the rear roof rail across the left and right ends of the rear roof rail. A rear roof rail portion structure in which the reinforcement is joined to the rear roof rail and the left and right body side outer parts, respectively, and a body formed in a U-shaped cross-section in which the vehicle longitudinal center portion of the reinforcement projects upward parts and at least the vehicle width direction to the middle of the left and right reinforcement from the rear roof rail With continuous along a bead having both ends continuous ridgeline of the main body portion, a hinge attachment portion of the back door from the body portion is formed rearward from the vertical wall portion of the rear continuous to said bead And the reinforcement is formed such that a central portion in the vehicle width direction is raised, and is formed so as to straddle the hinge mounting portion in the vehicle width direction. did.

  In the rear roof rail part structure in the back door vehicle according to claim 1, as described above, straddling the left and right side ends of the rear roof rail from the upper rear side of the left and right body side outers on the left and right side parts of the left and right braces. A rear roof rail part structure in which a pair of left and right reinforcements reaching the rear roof rail are joined to the rear roof rail and the left and right body side outer parts, respectively, in the vehicle width direction from the rear roof rail to at least the middle part of the left and right reinforcements By adopting a configuration in which beads are continuously formed along the surface, the rigidity of the rear roof rail portion, particularly the bending strength in the vertical direction is improved because stress is not concentrated on the joint between the two reinforcements and the rear roof rail. , While omitting the upper roof rail, Effect that it is possible to obtain the resistance and the vehicle body torsional rigidity.

  Embodiments of the present invention will be described below with reference to the drawings.

  The rear roof rail structure in the back door vehicle of this embodiment corresponds to the invention described in claims 1-7.

  FIG. 1 is a perspective view from the rear side of an upper part of a vehicle showing a state before a roof panel showing a rear roof rail portion structure in a back door vehicle of this embodiment, and FIG. 2 shows a roof panel attached to the rear roof rail portion structure of FIG. FIG. 3 is a perspective view of the vertical cross-sectional portion taken along the line AA in FIG. 1, and FIG. 4 is a view after the roof panel is attached to the rear roof rail structure shown in FIG. FIG. 5 is a perspective view of a vertical cross-sectional portion taken along the line BB in a state after the roof panel is attached to the rear roof rail structure shown in FIG. 1, and FIG. FIG. 7 is a longitudinal sectional view taken along the line C-C in a state after the roof panel is attached to the rear roof rail portion structure of FIG. 1, and FIG. 7 is a cross-sectional view of the state after the leaf panel is attached to the rear roof rail portion structure in FIG. On the line FIG. 8 is a perspective view of a longitudinal section, FIG. 8 is an exaggerated view for easy understanding of the twist deformation state of the back door opening showing the rear roof rail structure in the back door vehicle of the embodiment, and FIG. It is a figure exaggerated and shown in order to make an understanding of the local deformation state of the back door opening part which shows the rear roof rail part structure in a back door vehicle easy.

  The back door vehicle to which the rear roof rail portion structure of this embodiment is applied includes a left and right body side outer 1, a left and right pillar back outer 2, a left and right brace 3, a rear roof rail 4, and a left and right rain force 5. The roof panel 6 is provided as a main configuration.

  More specifically, in the back door vehicle of this embodiment, the left and right side ends of the rear roof rail 4 are joined to the upper ends of the left and right braces 3 by bolts, spot welding, etc. A pair of left and right sides extending from the upper rear side of both left and right body side outers 1 on both left and right sides of the left and right braces 3 to the rear roof rail 4 across the left and right ends of the rear roof rail 4. The reinforcement 5 has a rear roof rail portion structure in which the reinforcement 5 is joined to the rear roof rail 4 and the left and right body side outers 1, respectively.

  As shown in FIGS. 4 and 5, the left and right reinforcements 5 are formed in a U-shaped cross section in which the vehicle longitudinal direction center portion of the main body 51 protrudes upward.

  As shown in FIG. 1, beads 41 and 52 that are continuous in the vehicle width direction from the rear roof rail 4 to the middle part of both the left and right reinforcements 5 are formed with a substantially constant width, and the both left and right reinforcements 5 are also formed. In the state in which the bead 52 is continuous with one ridge line of the substantially U-shaped main body 51 in the left and right reinforcements 5, one ridge line in both the beads 41 and 52 is the both ends of the left and right reinforcements 5 in the vehicle width direction. Is continuous.

  Further, as shown in the longitudinal cross-sectional view of FIG. 2, the beads 41 and 52 continuous along the vehicle width direction are gently connected at the joint portion a of the left and right reinforcements 5 with respect to the vicinity of both left and right end portions of the rear roof rail 4. Further, the left and right reinforcements 5 are inclined downward toward the coupling portion a, while the left and right ends of the rear roof rail 4 are formed at a middle height so as to be inclined upward toward the coupling portion a. In addition, it joins by the spot welding in the vicinity of the connection part a.

  In addition, as shown in FIGS. 1 and 7, the left and right reinforcements 5 are formed in a substantially arc shape whose central portion in the vehicle width direction is increased, so that the rear vertical wall continuous from the main body portion 51 to the bead portion 52. The part 51a is formed in a circular arc shape with the central part in the vehicle width direction being higher. Then, a hinge mounting portion 53 having a U-shaped cross section is integrally formed rearward from the vertical wall portion 51a in the vehicle width direction so that the reinforcement 5 straddles the hinge mounting portion 53 in the vehicle width direction. Is formed.

  Next, functions and effects of the embodiment will be described.

In the rear roof rail structure in the back door vehicle of this embodiment, as described above, the beads 41 and 52 that are continuous along the vehicle width direction from the rear roof rail 4 to at least the middle part of the left and right reinforcements 5 are formed. By adopting the configuration, stress is not concentrated on the rigidity of the rear roof rail 4 part, in particular, the joint part between the two reinforcements 5 and the rear roof rail 4, and the bending rigidity in the vertical direction is increased, so that the upper roof rail is omitted. Thus, an effect that sufficient rigidity of the back door opening 7 and torsional rigidity of the vehicle body can be obtained can be obtained.
That is, as shown in FIG. 8, by the input from either the left or right of the back door opening 7 or the input in the opposite direction, as shown in FIG. Since the beads 41 and 52 that are continuous to the left and right reinforcements 5 and the rear rule rail 4 are formed, the upper side of the back door opening 7 (the left and right reinforcements 5 and the rear roof rail 4) is not bent and the force is applied to the opposite side. By transmitting to and receiving this, deformation of the back door opening 7 can be suppressed.

  Further, since the beads 41 and 52 that are continuous along the vehicle width direction from the rear roof rail 4 to at least the middle part of the left and right reinforcements 5 are formed with a substantially constant width, bending stress may be locally concentrated. Since it is eliminated, the rigidity can be further increased.

  The left and right reinforcements 5 are formed in a U-shaped cross section in which the central portion of the main body 51 protrudes upward, and extend from the rear roof rail 4 to the middle of the left and right reinforcements 5 along the vehicle width direction. In the state in which the continuous beads 41 and 52 are formed and the beads 52 of the left and right reinforcements 5 are continuous with one ridge line of the substantially U-shaped main body 51 in the left and right reinforcements 5, One ridge line at 52 is continuously formed to reach both ends in the vehicle width direction of the left and right reinforcements 5, so that a bead continuous over the entire length in the vehicle width direction to the main body 51 of the left and right reinforcements 5 is formed. Since it is formed, the rigidity can be further increased.

  Further, even when the width of the bead 41 in the rear roof rail 4 portion cannot be increased due to space, the beads can be continuously formed over the entire length of the rear roof rail 4 and the left and right reinforcements 5.

  Further, the beads 41 and 52 that are continuous in the vehicle width direction are connected so as to be gently connected at the joint portion a of the left and right reinforcements 5 with respect to the vicinity of both left and right end portions of the rear roof rail 4. Since the stress concentration is reduced, the decrease in bending rigidity can be suppressed.

  Further, by forming the left and right end portions of the rear roof rail 4 so as to incline upward toward the connecting portion a, the angle of inclination at the connecting portion a between the rear roof rail 4 and the left and right reinforcements 5 can be reduced. Therefore, it is possible to further suppress the decrease in bending rigidity.

Further, both the left and right reinforcements 5 are formed in a substantially arc shape whose center portion in the vehicle width direction is increased, so that the rear vertical wall portion 51a continuous from the main body portion 51 to the bead portion 52 has a center portion in the vehicle width direction. A hinge mounting portion 53 having a U-shaped cross section is formed integrally with the vertical wall portion 51a in the vehicle width direction from the vertical wall portion 51a toward the rear, so that the reinforcement 5 is connected to the hinge mounting portion 53. By adopting a configuration that is formed so as to straddle the vehicle width direction, it is possible to increase the support rigidity against the load F in the vertical direction that acts on the hinge mounting portion 53 when the back door is opened and closed.
Accordingly, the vicinity of the hinge mounting portion 53 near the upper portion of the back door opening (the left and right reinforcements 5 and the rear roof rail 4) is locally deformed as shown in FIG. 9 due to the vertical load F acting on the hinge mounting portion 53. Thus, the support rigidity of the back door can be increased.

  As described above, the embodiments of the present invention have been described with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and the present invention can be applied even if there is a design change or the like without departing from the gist of the present invention. included.

  For example, in the embodiment, the bead 52 of the left and right reinforcement 5 is formed so as to be continuous with the substantially U-shaped main body 51 in the left and right reinforcement 5, thereby reaching the main body 51 of the left and right reinforcement 5. Although the example which forms the bead which continues over the vehicle width direction full length was shown, only the beads 41 and 52 which continue along the vehicle width direction from the rear roof rail 4 to at least the middle part of both right and left reinforcements 5 were formed. However, the rigidity can be sufficiently increased.

It is a perspective view from the vehicle upper part rear side which shows the state before attaching the roof panel which shows the rear roof rail part structure in the back door vehicle of an Example. It is a longitudinal cross-sectional view in the AA line of FIG. It is a longitudinal cross-sectional view in the BB line of FIG. It is a perspective view of the longitudinal cross-section part in the AA line in the state after attaching a roof panel to the rear roof rail part structure of FIG. It is a perspective view of the longitudinal cross-section part in the BB line of FIG. It is a longitudinal cross-sectional view in the CC line of FIG. It is a perspective view of the longitudinal cross-section part in the CC line in the state after attaching the leaf panel to the rear roof rail part structure of FIG. It is a figure exaggeratingly shown in order to make an understanding of the twist deformation state of the back door opening part which shows the rear roof rail part structure in the back door vehicle of an example easy. It is a figure exaggerated and shown in order to make an understanding of the local deformation state of the back door opening part which shows the rear roof rail part structure in the back door vehicle of an example easy.

Explanation of symbols

a coupling portion 1 body side outer 2 pillar back outer 3 brace 4 rear roof rail 41 bead 5 reinforcement 51 main body 51a vertical wall portion 52 bead 53 hinge mounting portion 6 roof panel 7 back door opening portion

Claims (6)

The left and right sides of the rear roof rail are joined to the upper ends of both the left and right braces, and the left and right body sides are located on the left and right sides of the left and right braces. A rear roof rail part structure in which a pair of left and right reinforcements extending from the upper rear side of the outer to the rear roof rail across the left and right ends of the rear roof rail are joined to the rear roof rail and the left and right body side outer parts, respectively. ,
A body portion formed in a U-shaped cross-section in which the center portion in the vehicle longitudinal direction of the reinforcement projects upward ;
A bead that continues along the vehicle width direction from the rear roof rail to at least halfway portions of the left and right reinforcements , and that both end portions are continuous with the ridge line of the main body portion ;
A hinged portion of a back door formed from the rear vertical wall portion continuous from the main body portion to the bead toward the rear, and
Formed ,
The rear roof rail portion in the back door vehicle is characterized in that the reinforcement is formed so that a central portion in the vehicle width direction is raised and straddles the hinge mounting portion in the vehicle width direction. Construction. Rear roof rail in the back door vehicle according to claim 1, characterized in that the bead which continuously along the vehicle width direction to at least an intermediate portion of the left and right reinforcement from the rear roof rail is formed in a constant width Part structure.   One ridge line in the bead that continues along the vehicle width direction from the rear roof rail to at least the middle part of the left and right reinforcements continues to both ends of the left and right reinforcements in the vehicle width direction. The rear roof rail part structure in the back door vehicle according to claim 1 or 2. The back door according to any one of claims 1 to 3, wherein a connecting portion of the left and right reinforcements with respect to the vicinity of both left and right end portions of the rear roof rail is connected so as to be connected in the vertical direction. Rear roof rail structure in a car. The bead is formed by inclining the left and right reinforcements downward toward the connecting portion at the joint portion of the left and right reinforcements with respect to the vicinity of both left and right end portions of the rear roof rail, and the left and right ends of the rear roof rail. The rear roof rail part structure in the back door vehicle according to any one of claims 1 to 4, wherein the part is formed to be inclined upward toward the coupling part . The bead of the said both left-right reinforcement is formed in the state which follows the cross-sectional U-shaped main-body part of the main-body part of this right-and-left both reinforcement, The any one of Claims 1-5 characterized by the above-mentioned. Rear roof rail structure for backdoor cars

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