WO2015122400A1 - Opening section structure for rear section of vehicle body - Google Patents

Opening section structure for rear section of vehicle body Download PDF

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Publication number
WO2015122400A1
WO2015122400A1 PCT/JP2015/053612 JP2015053612W WO2015122400A1 WO 2015122400 A1 WO2015122400 A1 WO 2015122400A1 JP 2015053612 W JP2015053612 W JP 2015053612W WO 2015122400 A1 WO2015122400 A1 WO 2015122400A1
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WO
WIPO (PCT)
Prior art keywords
reinforcement
opening
width direction
vehicle
ridge line
Prior art date
Application number
PCT/JP2015/053612
Other languages
French (fr)
Japanese (ja)
Inventor
和也 中島
勇人 中村
Original Assignee
スズキ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by スズキ株式会社 filed Critical スズキ株式会社
Priority to DE112015000063.1T priority Critical patent/DE112015000063B4/en
Priority to CN201580000542.1A priority patent/CN105143022B/en
Publication of WO2015122400A1 publication Critical patent/WO2015122400A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/04—Door pillars ; windshield pillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/06—Fixed roofs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/087—Luggage compartments

Definitions

  • the present invention relates to a hinge mounting part at the upper part of an opening part at the rear part of a vehicle body for attaching a back door of an automobile, and an opening part structure at the rear part of the vehicle body with increased rigidity in the vicinity thereof.
  • a back door is attached to the upper part of the opening at the rear of the vehicle body via a hinge that rotates about a rotation axis along the vehicle width direction. Since the load from the back door concentrates on this hinge, the hinge mounting seat at the rear part of the roof panel for mounting the hinge needs to have sufficient rigidity.
  • the upper corner of the opening on the outer side in the vehicle width direction than the hinge mounting seat also deforms the opening during driving and causes high stress concentration, so it is sufficient especially at the junction between the side body and the roof panel. A reinforced structure is required.
  • a roof back inner member is disposed below the rear part of the roof panel, Between the roof back inner member, the upper roof back inner reinforcement and the lower hinge reinforcement are arranged in a closed cross-sectional shape, and each of the roof back inner force, the hinge reinforcement and the roof back inner member is arranged. The front end is overlapped and joined to the roof panel.
  • the rear part of the roof back inner reinforcement and the hinge reinforcement are overlapped on the horizontal hinge mounting seat at the step part of the substantially horizontal L-shaped cross section of the roof panel, and the hinge is joined together by tightening the bolts, and the roof back
  • the rear end portions of the inner member and the roof back inner reinforcement are overlapped and joined to the rear inclined portion of the step portion of the roof panel. That is, a closed cross-section structure with two parts is provided on the front side of the hinge mounting seat surface.
  • JP 2012-224109 A (FIGS. 3 to 5)
  • the present invention simultaneously has a hinge mounting seat on the back door mounting opening at the rear of the vehicle body and an upper corner of the opening on the outer side in the vehicle width direction than the hinge mounting seat. It is another object of the present invention to provide an opening structure at the rear of a vehicle body that can be reinforced with a simple and lightweight structure.
  • the opening structure of the rear part of the vehicle body according to claim 1 of the present invention has a hinge mounting seat part at the rear part of the roof panel extended to the upper end of the opening part for mounting the back door at the rear part of the vehicle body.
  • a roof back inner member formed on the inner side of the vehicle at the rear of the roof panel is coupled to a side body on the vehicle width direction outer side, and the roof panel and the roof back inner member form a closed cross-sectional structure,
  • the side body extends from the hinge mounting seat between the roof panel and the roof back inner member.
  • the reinforcement is disposed and fixed over the vertical direction, and the reinforcement is joined to the vertical wall formed at the rear of the roof panel and the hinge mounting seat,
  • the ose is formed in a crank-shaped cross section, and has a ridge line of mountain folds on the upper side and a ridge line of valley folds on the lower side.
  • the distance between the upper and lower ridge lines is near the hinge mounting seat on the inner side in the vehicle width direction. Is narrow and wide in the vicinity of the side body outside in the vehicle width direction.
  • the opening structure of the rear part of the vehicle body according to claim 2 is the opening structure of the rear part of the vehicle body according to claim 1, wherein the upper ridge line of the reinforcement is continuously connected to the curved shape of the outer plate of the side body. It is characterized by being.
  • the opening structure of the rear part of the vehicle body according to claim 3 is the opening structure of the rear part of the vehicle body according to claim 1 or 2, wherein the lower ridge line of the reinforcement is outward in the vehicle width direction with respect to the upper ridge line. It is characterized by extending toward the vehicle lower side as it goes.
  • the opening structure of the rear part of the vehicle body according to claim 4 is the opening structure of the rear part of the vehicle body according to claim 3, wherein the ridge line inside the side part of the opening part is in contact with the extension line of the lower ridge line.
  • the opening structure of the rear part of the vehicle body according to claim 5 is the opening structure of the rear part of the vehicle body according to claim 3, wherein the lower ridge line is a valley-shaped ridge line of the side body outside the side part of the opening part. It is extended so that it may cross.
  • the opening structure of the rear part of the vehicle body according to claim 6 is the opening structure of the rear part of the vehicle body according to any one of claims 1 to 5, wherein an outer part in the vehicle width direction of the vertical wall of the reinforcement is an inner part in the vehicle width direction. In comparison, the surface phase is different so as to incline downward.
  • the reinforcement is crossed between the hinge mounting seat portion of the roof panel and the upper corner portion of the opening portion of the rear portion of the vehicle body, so that the rigidity of the upper corner portion of the opening portion where stress concentration easily occurs. Can be increased.
  • the roof panel and the reinforcement are joined on the two sides of the hinge mounting seat and the vertical wall, and the hinge mounting seat of the roof panel is supported from the passenger compartment side by the reinforcement so that the hinge mounting seat has sufficient rigidity. Can be secured.
  • the vertical wall of the reinforcement in the vicinity of the hinge mounting seat has a cross section with a narrow interval between the upper and lower ridge lines, so that the mounting rigidity of the back door hinge can be increased, and the rear opening of the vehicle body against loads in the longitudinal direction of the vehicle Can be prevented from deforming.
  • the stress concentration can be dispersed with respect to the load from the lateral direction due to the twist of the opening, and the reinforcing effect can be enhanced.
  • the torsional load acting on the opening is effectively distributed to the side body.
  • the reinforcing effect can be further enhanced.
  • the lower ridge line of the reinforcement is continuous with the vertical side of the opening at the rear of the vehicle body, so that the load in the torsional direction acting on the opening is It is possible to effectively disperse the portion, and the rigidity of the upper corner of the opening can be further increased.
  • the rigidity of the reinforcement against the lateral load in the vehicle width direction can be increased, Thereby, the stress concentration of the upper part and the upper corner of the opening can be further relaxed.
  • FIG. 1 is a perspective view showing an embodiment of an opening structure of a rear part of a vehicle body of the present invention as viewed from the rear of a vehicle. It is a perspective view which similarly shows in detail the opening part structure of a vehicle body rear part.
  • FIG. 4 is a cross-sectional view taken along line AA in FIG. 3.
  • FIG. 4 is a sectional view taken along line BB in FIG. 3.
  • FIG. 3 shows one Embodiment of the reinforcement applied to the opening part structure of a vehicle body rear part.
  • FIG. 4 is a perspective view showing the opening structure of the rear part of the vehicle body as seen from the left side of the vehicle a little more than in FIG. 3. It is a perspective view which shows the difference in the inclination state of each part of right and left of the vertical wall of a reinforcement. It is a perspective view which shows the 1st modification of reinforcement. It is a perspective view which shows the 2nd modification of reinforcement. It is a perspective view which shows the 3rd modification of reinforcement. It is a perspective view which shows the 4th modification of a reinforcement.
  • 1 to 7 show an embodiment of an opening structure at the rear of a vehicle body according to the present invention.
  • FIG. 1 is an external view showing an opening 2 in a rear part of a vehicle body 1 of an automobile (the inside of the frame is an enlarged view of a main part), and an upper part and an upper corner 3 of the opening 2 are a rear part 4a of a metal roof panel 4. And the side body 7.
  • FIG. 2 is a view showing the internal reinforcing structure by breaking the rear portion 4a of the roof panel 4 at the upper portion and the upper corner portion 3 of the opening 2
  • FIG. 3 is a view showing the reinforcing structure in detail.
  • reference numeral 5 denotes an outer plate of the side body 7
  • reference numeral 6 denotes a rear plate of the side body 7.
  • the roof panel 4 is substantially flat over the entire width (exactly, it is curved so that the central side in the width direction is slightly convex upward), and the side body portions 5 that continue to the left and right sides in the vehicle width direction of the roof panel 4 are It is greatly curved downward (the curved portion is indicated by reference numeral 5a).
  • a pair of hinge mounting seats 8 are formed on the left and right sides of the rear portion 4a of the roof panel 4 in FIG. 1 (only the hinge mounting seat 8 on the left side of the vehicle is shown in FIG. 1).
  • the hinge mounting seat portion 8 has a wide upper wall 8a, a narrow rear wall 8b, a side wall 8c on the inner side in the vehicle width direction, and a bolt insertion hole 8d in the upper wall 8a.
  • the upper surface of the upper wall 8a is a hinge mounting seat.
  • the upper wall 8a continues across the vertical wall 9 of the roof panel rear portion 4a.
  • the rear portion 4a of the roof panel 4 is formed in a stepped shape in the left and right hinge mounting seats 8 (FIG. 4).
  • the hinge mounting seat portion 8 (FIG. 5).
  • 4 is composed of a substantially vertical vertical wall 9a on the front side and a lateral wall 10 (FIG. 1) on the rear and lower side.
  • the inclined vertical wall in FIG. 5 is indicated by reference numeral 9b.
  • a flat inner surface is formed on the back side of the hinge mounting seat surface 8a.
  • a roof back inner member 12 as a reinforcing member is disposed below the rear portion 4 a of the roof panel 4, and above the roof back inner member 12, that is, between the roof back inner member 12 and the roof panel 4.
  • the reinforcement 13 which is the main part of the present invention is disposed.
  • the roof back inner member 12 is slightly extended rearward of the vehicle body from the hinge mounting seat portion 8 (shown by a chain line for convenience in FIG. 2) of the roof panel 4 (the rear extension portion is indicated by reference numeral 12a). More than the front of the vehicle body (the front extension is indicated by reference numeral 12b), and also extends to the left and right sides of the hinge mounting seat 8 in the vehicle width direction and crosses the upper part of the opening 2 in the vehicle width direction. .
  • the front and rear ends (12a, 12b) of the roof back inner member 12 are joined to the roof panel 4, and the roof width inner end 12c of the roof back inner member 12 is the outer end of the roof panel 4 in the vehicle width direction. It is joined to the side body 7 together with the portion 4b.
  • the roof back inner member 12 forms a closed section structure (closed section shape portion) 21 together with the roof panel 4.
  • the rear portion 4 a of the roof panel 4 has a vertical wall 9 a having a substantially vertical surface on the front side of the hinge mounting seat portion 8, and is substantially horizontal and narrow on the front side and the upper side of the vertical wall 9 a. It has a lateral wall 14 of the surface. Then, on the inner surface of the hinge mounting seat portion 8 of the roof panel 4 and the inner surface of the vertical wall 9a, the upper surface 15a of the substantially horizontal wall portion (lateral wall) 15 on the rear side and the lower side of the reinforcement 13 from the inside of the vehicle, The substantially vertical rear surface of the vertical wall 16 in the vehicle width direction inner portion 16a (substitute with reference numeral 16a) is joined.
  • An upper substantially horizontal wall portion (horizontal wall) 17 projecting forward from the upper end of the vertical wall 16 is positioned between the roof back inner member 12 and the roof panel 4 without being joined.
  • the vertical wall 9 and the upper wall 14 of the roof panel 4 are indicated by chain lines.
  • the reinforcement 13 has a substantially horizontal upper surface 15a that is joined to the inner surface (lower surface) of the hinge mounting seat portion 8 of the roof panel 4 near the inner end 15b in the vehicle width direction.
  • a plate-shaped vertical wall 16 having 16a near the inner end in the vehicle width direction, and a narrow, substantially horizontal surface that protrudes forward from the upper end of the vertical wall 16 and faces the lower side of the substantially horizontal surface above the roof panel 4.
  • a flange plate-like upper wall portion (horizontal wall) 17 having a flat surface 17a near the inner end in the vehicle width direction.
  • the vertical wall 16 and the upper wall portion 17 of the reinforcement 13 have the same length and extend outward in the vehicle width direction to the upper corner 3 of the opening 2 (FIG. 2) at the rear of the vehicle body.
  • the lower wall portion 15 of the reinforcement 13 is shorter than the intermediate vertical wall 16 on the outer side in the vehicle width direction.
  • the lower wall portion 15 corresponds to the hinge mounting seat portion 8 of the rear portion 4a of the roof panel in FIG. 1 from the substantially longitudinal center (outside the joint surface 15a in the vehicle width direction) toward the vehicle width direction outer side. It is formed so as to be gradually narrow and gradually curved downward (the narrow portion and the curved portion are indicated by reference numeral 15c).
  • a bolt insertion hole 15d is provided in the joint surface 15a of the lower wall portion 15 corresponding to the hinge mounting seat portion 8.
  • the bolt insertion hole 15d passes through the bolt insertion holes 8d and 12d (FIG. 4) concentrically between the hinge mounting seat 8 (FIG. 4) and the roof back inner member 12.
  • the roof back inner member 4 (FIGS. 2 and 4) has an upper wall 12e joined to the lower surface of the lower wall portion 15 of the reinforcement 13, and a bolt insertion hole 12d is provided in the upper wall 12e.
  • the vertical wall 16 of the reinforce 13 (FIG. 2) is formed so as to gradually increase in the vertical direction (precisely downward) from the middle in the longitudinal direction toward the outside in the vehicle width direction, and gradually toward the rear of the vehicle. Inclined or curved. A wide and inclined or curved outer portion of the vertical wall 16 in the vehicle width direction is indicated by reference numeral 16b. Further, the lower extension of the vehicle width direction outer side portion 16b is denoted by reference numeral 16b '.
  • the vehicle width direction outer end 15e of the lower wall portion 15 intersects the lower end of the vertical wall 16 on the vehicle width direction inner side than the vehicle width direction outer end 16c of the vertical wall 16.
  • the upper wall portion 17 is formed in a substantially fan-like shape in the forward and backward direction (exactly in the rear direction) gradually from the middle portion in the longitudinal direction toward the outer side in the vehicle width direction (the wide portion is indicated by reference numeral 17b).
  • the vehicle width direction outer end 16c of the vertical wall 16 is joined to the rear side body portion 6 (FIG. 2), and the vehicle width direction outer end 17c of the upper wall portion 17 is the upper curve of the side body 5 (FIG. 2).
  • the end portion of the portion 5a on the inner side in the vehicle width direction and the side body portion 6 on the rear side are joined.
  • the line at the intersection of the lower end of the vertical wall 16 and the rear end of the lower wall portion 15 of the reinforcement 13 that is, the lower valley fold ridge line 19L gradually increases toward the outer side in the vehicle width direction. It curves toward the vehicle lower side and the rear side. Further, the line of the intersecting portion between the upper end of the vertical wall 16 and the front end of the upper wall portion 17, that is, the upper mountain fold ridge line 20L is gradually inclined toward the rear side of the vehicle as it goes outward in the vehicle width direction.
  • the ridge line 20L on the upper side of the reinforcement 13 is extended to the upper corner 3 of the opening 2 (FIG. 2) at the rear of the vehicle body toward the outside in the vehicle width direction.
  • the lower ridge line 19L does not need to extend to the upper corner 3 of the opening 2 but preferably extends outward in the vehicle width direction as much as possible in order to ensure the rigidity of the entire reinforcement 13. .
  • the AA cross section (cross section passing through the hinge mounting seat 8) in FIG. 3 includes the reinforcement 13 on the hinge mounting seat 8 and the front side thereof, the vertical wall 16, and the substantially horizontal rear wall 16.
  • a side and lower wall portion 15 and a substantially horizontal front and upper wall portion 17 are formed in a crank shape (substantially Z-shaped) in cross section.
  • the vertical wall 16 of the reinforcement 13 is arranged and joined along the inner surface (front surface) of the vertical wall 9a of the step portion of the roof panel rear portion 4a, and the rear and lower wall portion 15 is a step portion of the roof panel rear portion 4a.
  • Hinge fixing bolt insertion holes 8d, 12d, and 15d are provided at substantially the center of the three overlapping wall portions 8a, 15, and 12e, and the hinge mounting portion 22 is configured.
  • the front and upper wall portion 17a of the reinforcement 13 protrudes forward from the vertical wall 9a of the stepped portion of the roof panel 4 so as to be close to the upper wall 14 of the roof panel 4 between the roof panel 4 and the roof back inner member 12.
  • the upper wall 14 of the roof panel 4 is positioned substantially parallel to the central bottom wall 12g of the roof back inner member 12.
  • the roof back inner member 12 includes a rear upward bulging portion (convex portion) 12f, a substantially horizontal bottom wall 12g following the front side of the bulging portion 12f, and a vertical wall raised from the front end of the bottom wall 12g. 12h, and a front wall portion 12b that is bent and inclined upward from the upper end of the vertical wall 12h.
  • the front end portion of the front wall portion 12b is joined to the upper wall 14 of the roof panel 4, and the rearwardly inclined wall portion 12a following the rear upward bulging portion 12f is joined to the rear end portion 18 of the roof panel 4.
  • reference numeral 20 ⁇ / b> L indicates an upper ridge line where the upper wall portion 17 of the reinforcement 13 intersects the vertical wall 16
  • reference numeral 19 ⁇ / b> L similarly indicates a lower side where the vertical wall 16 and the lower wall portion 15 intersect.
  • the ridgeline is shown.
  • the vertical wall 16b of the reinforcement 13 includes the vertical wall 9b of the roof panel rear portion 4a and the roof back inner member 12 as shown in FIG. It is sandwiched between the rear wall 12k of the upward mountain-shaped protrusion 12j and joined to each other while being inclined downwardly.
  • the rear and lower wall portion 15c of the reinforcement 13 is inclined at an angle slightly closer to the horizontal than the vertical wall 16b and is located along the lower inner side of the inclined vertical wall 9b of the roof panel 4, and the front side of the reinforcement 13 Further, the upper wall portion 17b is positioned substantially horizontally in parallel with the upper wall 14 and the bottom wall 12g of the roof back inner member 12 near the upper wall 14 of the roof panel 4.
  • the bottom wall 12g of the roof back inner member 12 continues to the substantially mountain-shaped protruding portion 12j on the rear side, and the lower end portion 12k ′ of the inclined wall 12k on the rear side of the protruding portion 12j is connected to the inclined wall 9b on the rear side of the roof panel 4. It is joined.
  • the upper wall portion 17b of the reinforce 13 is longer in the front-rear direction than the upper wall portion 17a in FIG. 4, and the upper ridge line 20L is located behind the upper ridge line 20L in FIG.
  • the wall portion 15c extends downward from the lower wall portion 15 in FIG. 4 and is inclined downwardly, and the lower ridge line 19L is positioned lower and rearward than the lower ridge line 19L in FIG. .
  • the roof panel 4 and the reinforcement 13 are joined to each other by two surfaces of the surfaces 8 a and 15 a of the hinge mounting seat 8 and the substantially vertical surfaces 9 a and 16 a in front of the vehicle.
  • the reinforcement 13 is supported by the reinforcement 13 from the passenger compartment side, and the rigidity of the hinge mounting seat 8 is sufficiently ensured.
  • the reinforcement 13 crosses the hinge mounting seat 8 of the roof panel rear portion 4a and the upper corner 3 of the opening 2 at the rear of the vehicle body.
  • the roof panel 4 on the outside of the vehicle extends in the vehicle front-rear direction at a peripheral portion of the opening 2 where a back door (not shown) at the rear of the vehicle is installed.
  • a hinge mounting seat portion 8 (FIG. 1) including a hinge mounting seat surface 8a is formed on the roof panel extension portion (rear portion) 4a extending to the upper end of the opening 2 at the rear of the vehicle.
  • a roof back inner member 12 on the vehicle inner side is disposed at the upper end of the opening 2 by connecting the left and right side portions of the roof back inner member 12 to the left and right side bodies 7.
  • the roof panel 4 and the roof back inner member 12 form a closed section structure (closed section shape portion) 21 (FIG. 4), and the closed section structure 21 is formed at the left and right upper corners 3 of the opening 2 at the left and right sides. It is joined to the side body 7.
  • the reinforcement 13 is disposed between the roof panel 4 and the roof back inner member 12, and the inner surface of the vertical wall 9a formed on the rear portion 4a of the roof panel 4 and the hinge mounting seat portion.
  • the reinforcement 13 is joined to the inner surface of the roof 8, and the reinforcement 13 is arranged and fixed from the hinge mounting seat 8 of the roof panel 4 to the side body 7.
  • the reinforcement 13 is formed in a cross-sectional crank shape (Z-shape) by the upper and lower horizontal walls 15 and 17 and the intermediate vertical wall 16, and has a mountain-folded ridgeline 20L on the upper side and a valley-folded ridgeline 19L on the lower side.
  • the distance H between the two ridges 19L and 20L in the vertical direction is narrow (space H1) near the hinge mounting seat (fixed part) 8 on the inner side in the vehicle width direction, and near the side body 7 on the outer side in the vehicle width direction. It is getting wider. That is, the vertical width of the vertical wall 16 of the reinforcement 13 becomes wider (interval H2) as it goes to the vehicle outer side.
  • two lower ridge lines are formed depending on the viewing angle (the ridge line 19L1 when viewed from the rear upper part of the vehicle and the ridge line 19L2 when viewed from the rear of the vehicle).
  • the ridgeline is also summarized as 19L.
  • the vicinity of the hinge mounting seat 8 in the reinforcement 13 has a narrow cross-sectional shape with a space H1 between the upper and lower ridgelines 19L, 20L (the vertical width of the vertical wall 16a is shortened), thereby The mounting rigidity can be increased, and the reinforcement 13 is less likely to be deformed even with respect to the vehicle longitudinal direction load. Further, as the distance from the side body 7 increases, the distance H2 between the upper and lower ridges 19L and 20L of the reinforcement 13 is increased, whereby the stress concentration of the reinforcement 13 is applied to the load from the lateral direction of the vehicle due to the twist of the opening 2 at the rear of the vehicle. The effect of dispersing is exhibited.
  • the second feature is that the upper ridge line 20 ⁇ / b> L of the reinforcement 13 is continuously connected to the upper curved shape 5 a of the outer plate (side body outer panel) 5 of the side body 7. (Refer to the extended portion 20L ′ of the ridge line 20L).
  • the upper ridge line 20L continues substantially linearly from the upper curved shape 5a of the side body 5 along the outer surface 5b inclined obliquely downward in the side body 5 in a substantially tangential direction.
  • the load in the twisting direction of the opening 2 at the rear of the vehicle can be effectively distributed to the side body 7.
  • the third feature is that the lower ridge line 19 ⁇ / b> L of the reinforcement 13 is at least in the range of the reinforcement 13 toward the vehicle outer side (vehicle width direction outer side) with respect to the upper ridge line 20 ⁇ / b> L. It is mentioned that it extends toward The upper ridge line 20L of the reinforcement 13 extends substantially horizontally toward the vehicle outer side, whereas the lower ridge line 19L gradually transitions downward toward the vehicle outer side.
  • the peripheral edge 25 of the opening 2 is shortly raised like a flange toward the rear, and the rising base of the peripheral edge 25, that is, the line of the intersection of the peripheral edge 25 and the side body 6 forms a ridge line 23 ⁇ / b> L inside the vehicle. ing.
  • the lower ridge line 19 ⁇ / b> L ⁇ b> 2 of the reinforcement 13 is a side part of the opening 2 at the rear of the vehicle body (upper side of the vertical side part 24). It is extended so that it may intersect with the ridgeline 26L of the valley shape (valley fold) on the vehicle outer side (vehicle width direction outer side) of the body 6 (see the intersection portion 26La between the extension portion 19L2 ′ of the ridgeline 19L2 and the ridgeline 26L). It is done.
  • the fifth feature is configured separately from the fourth feature (either one is selected).
  • the side body portions 6 on both sides of the upper portion of the opening 2 are composed of a vehicle outer wall portion 6a having a thickness in the vehicle width direction and a vehicle inner wall portion 6b having a thickness in the vehicle front-rear direction.
  • the line at the intersection of 6b forms a valley-shaped ridge line 26L.
  • the valley-shaped ridge line 26L extends downward substantially parallel to the vehicle-side ridge line 23L of the fourth feature.
  • the upper end portion of the back door stay is screwed to the wall portion 6a outside the vehicle (a bolt insertion hole is indicated by reference numeral 6c).
  • the lower ridge line 19L of the reinforcement 13 is continuous with the vertical side 24 including the side body portion 6 of the opening 2, and the load is effectively applied to the vertical side 24. As a result, the rigidity of the upper corner 3 of the opening 2 is further increased.
  • the surface phase is different between the vehicle width direction inner portion 16 a and the vehicle width direction outer portion 16 b of the vertical wall 16 of the reinforcement 13 (the vertical wall 16 Is twisted).
  • the vehicle width direction inner portion 16a of the vertical wall 16 is formed substantially vertically, and the vehicle width direction outer portion 16b of the vertical wall 16 is inclined downwardly as shown in FIG.
  • the vertical wall 16 has a shape twisted in the front-rear direction so as to incline the vehicle width direction outer side portion 16b rearward and downward with respect to the vehicle width direction inner side portion 16a.
  • the inclination of the inner portion 16a in the vehicle width direction is indicated by a line 27L
  • the inclination of the outer portion 16b in the vehicle width direction is indicated by a line 28L.
  • Reference numeral 15 denotes a lower wall of the reinforcement 1
  • reference numeral 17 denotes an upper wall
  • the rigidity of the reinforcement 13 against lateral load in the vehicle left-right (width) direction is changed by changing the surface phase between the vehicle width direction inner side 16a and the vehicle width direction outer side 16b of the vertical wall 16 of the reinforcement 13.
  • the stress concentration in the upper corner 3 of the opening 2 is further relaxed.
  • 9 to 12 show various examples in which the shape of the reinforcement 13 shown in FIG. 6 is changed.
  • Each reinforce 31, 32 in FIG. 9 and FIG. 10 is a simplified structure.
  • the reinforce 31 shown in FIG. 9 has a substantially vertical vertical wall 35, a substantially horizontal small horizontal wall 36 that extends below and behind the vertical wall 35, and a horizontal wall 37 that extends above and in front of the vertical wall 35. is there.
  • the reinforcement 32 in FIG. 10 has a vertical wall 38 and upper and lower horizontal walls 39 and 40 that have the same length in the vehicle width direction and shorter than the example in FIG.
  • Each lower side wall 36, 39 has a bolt insertion hole 41 for hinge attachment.
  • each of the reinforces 31 and 32 has a cross-sectional crank shape (Z shape), and the roof panel 4 (FIG. 1) and the reinforces 31 and 32 are substantially vertical in front of the vehicle body and the inner surface of the hinge mounting seat 8 (FIG. 1).
  • the hinge mounting seat portion 8 is joined to the inner surface of the vertical wall 9 (FIG. 1), and the hinge mounting seat portion 8 of the roof panel 4 is supported by the reinforcements 31 and 32 from the passenger compartment side. Can be secured.
  • the hinge mounting seat 8 of the roof panel 4 (FIG. 1) and the opening 2 at the rear of the vehicle body are formed.
  • the reinforcement 31 (32) crosses the upper corner 3 with the same upper ridge line 43L, whereby the upper opening corner 3 where stress concentration easily occurs can be reinforced.
  • the weight of the vehicle body can be reduced with a simple reinforcement structure.
  • the reinforcements 33 and 34 have a slightly complicated and enlarged structure while retaining the configuration of the reinforcement 13 of FIG.
  • Reinforce 33 shown in FIG. 11 is integrally formed with an extension wall 46 inclined downwardly toward the rear of the vehicle body at the lower end of vertical wall 44 and the rear end of lower horizontal wall 45 that is short in the vehicle width (left-right) direction. It is a thing.
  • the line of the intersection of the vertical wall 44 and the lower horizontal wall 45 and the rear extension wall 46 forms a lower ridge line 47L, and the line of the intersection of the vertical wall 44 and the upper horizontal wall 48 is the upper ridge line. 52L is formed.
  • the reinforcement 34 in FIG. 12 is obtained by extending the vertical wall 49 and the upper and lower horizontal walls 50 and 51 inward in the vehicle width direction (extended wall portions are denoted by reference numerals 49a, 50a, and 51a).
  • the lower extension wall portion 50a is formed in a step shape along the inner surface shape of the hinge mounting seat portion 8 of the roof panel 4 (FIG. 1).
  • the line of the intersection of the vertical wall 49 and the lower horizontal wall 50 forms the lower ridge line 53L
  • the line of the intersection of the vertical wall 49 and the upper horizontal wall 51 forms the upper ridge line 54L.
  • Each of the lower side walls 45 and 50 on the lower side of FIGS. 11 and 12 has a bolt insertion hole 41 for hinge attachment.
  • 11 and 12 has the above-described effects due to the upper and lower ridgelines 47L, 52L, 53L, and 54L similar to those in the reinforcement 13 of FIG.
  • the rear extension wall 46 of the reinforcement 33 is arranged so as to overlap along the vehicle rear portion 12 a of the roof back inner member 12 shown in FIGS. 2 and 4.
  • the rigidity of the upper edge part of the opening part 2 can be improved.
  • the vertical wall extension 49a of the reinforcement 34 is overlapped on the inner side in the vehicle width direction along the inner surface of the vertical wall 9 of the roof panel 4 (FIG. 1), and the roof back inner member 12 (see FIG. 12).
  • the rigidity of the upper part of the opening 2 can be increased by superimposing the lower side wall extension 50a on the lower side of the reinforcement 34 on the portion inward in the vehicle width direction of 2).
  • the opening structure of the rear part of the vehicle body according to the present invention is such that the hinge mounting seat part at the upper part of the opening part for mounting the back door at the rear part of the vehicle body and the upper corner part of the opening part on the outer side in the vehicle width direction from the hinge mounting seat part simultaneously. And it can be used to reinforce with a simple and lightweight structure.

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  • Chemical & Material Sciences (AREA)
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  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The purpose of the present invention is to simultaneously reinforce a hinge attachment seat for an upper part of an opening section for back door attachment and an upper corner section of the opening section, by using a simple and light-weight structure.　A closed cross-sectional structure (21) is formed by a roof panel and a roof back inner member; the closed cross-sectional structure is joined to a side body by the upper corner section (3) of the opening section; a reinforcement (13) is arranged and fixed from the hinge attachment seat (8) across to the side body (7), between the roof panel (4) and the roof back inner member (12); and the reinforcement (13) is joined to a vertical wall (9) formed in a rear section of the roof panel and to the hinge attachment seat (8). The reinforcement (13) is configured so as to form a crank-shaped cross-section, to have a ridge-folded ridge line (20L) on the upper side thereof and a valley-folded ridge line (19L) on the lower side thereof, and to have an interval (H) between the upper and lower ridge lines that is narrower in the vicinity of the hinge attachment seat on the inside in the vehicle width direction and wider in the vicinity of the side body on the outside in the vehicle width direction.

Description

車体後部の開口部構造Car body rear opening structure
　本発明は、自動車のバックドアを取り付けるための車体後部の開口部の上部のヒンジ取付部とその近傍の剛性を高めた車体後部の開口部構造に関するものである。 The present invention relates to a hinge mounting part at the upper part of an opening part at the rear part of a vehicle body for attaching a back door of an automobile, and an opening part structure at the rear part of the vehicle body with increased rigidity in the vicinity thereof.
　ハッチバックタイプの自動車（車両）では、多くの場合、車体後部の開口部の上部に、車幅方向に沿う回転軸で回動するヒンジを介してバックドアが取り付けられている。このヒンジには、バックドアからの荷重が集中するため、ヒンジを取り付けるためのルーフパネル後部のヒンジ取付座部には十分な剛性が必要となる。 In hatchback type automobiles (vehicles), in many cases, a back door is attached to the upper part of the opening at the rear of the vehicle body via a hinge that rotates about a rotation axis along the vehicle width direction. Since the load from the back door concentrates on this hinge, the hinge mounting seat at the rear part of the roof panel for mounting the hinge needs to have sufficient rigidity.
　また、ヒンジ取付座部よりも車幅方向外側における開口部の上隅部についても、走行時に開口部が変形して高い応力集中を生じるため、特にサイドボディとルーフパネルとの接合箇所には十分な補強構造が必要となる。 In addition, the upper corner of the opening on the outer side in the vehicle width direction than the hinge mounting seat also deforms the opening during driving and causes high stress concentration, so it is sufficient especially at the junction between the side body and the roof panel. A reinforced structure is required.
　従来の車体後部の開口部構造として、例えば特許文献１（図示せず）に記載された構造においては、ルーフパネルの後部の下側にルーフバックインナメンバを配設すると共に、ルーフパネルの後部とルーフバックインナメンバとの間に、上側のルーフバックインナリンフォースと下側のヒンジリンフォースとを閉断面形状に配設し、ルーフバックインナリンフォースとヒンジリンフォースとルーフバックインナメンバとの各前端部を重ねてルーフパネルに接合している。 As a conventional opening structure at the rear part of the vehicle body, for example, in the structure described in Patent Document 1 (not shown), a roof back inner member is disposed below the rear part of the roof panel, Between the roof back inner member, the upper roof back inner reinforcement and the lower hinge reinforcement are arranged in a closed cross-sectional shape, and each of the roof back inner force, the hinge reinforcement and the roof back inner member is arranged. The front end is overlapped and joined to the roof panel.
　さらに、ルーフバックインナリンフォースとヒンジリンフォースとの各後部をルーフパネルの断面略横Ｌ字状の段差部における水平なヒンジ取付座面に重ねてボルトの共締めでヒンジを接合し、ルーフバックインナメンバとルーフバックインナリンフォースとの各後端部を重ねてルーフパネルの段差部の後側の傾斜部に接合している。すなわち、ヒンジ取付座面の車体前側に、二部品による閉断面構造を設けている。 Furthermore, the rear part of the roof back inner reinforcement and the hinge reinforcement are overlapped on the horizontal hinge mounting seat at the step part of the substantially horizontal L-shaped cross section of the roof panel, and the hinge is joined together by tightening the bolts, and the roof back The rear end portions of the inner member and the roof back inner reinforcement are overlapped and joined to the rear inclined portion of the step portion of the roof panel. That is, a closed cross-section structure with two parts is provided on the front side of the hinge mounting seat surface.
特開２０１２－２２４１０９号公報（図３～図５）JP 2012-224109 A (FIGS. 3 to 5)
　しかしながら、上記特許文献１記載の構造にあっては、二部品による閉断面構造を作る必要があるため、重量が増加するという懸念があった。また、閉断面構造の中に閉断面構造を閉じ込める形状となっているため、製造時に部材同士の接合が困難になり兼ねないという懸念があった。また、特許文献１記載の構造においては、上記背景技術の前段で記述した車体後部の開口部の上隅部、すなわちヒンジ取付座面よりも車幅方向外側における開口部の上隅部の補強までは実現されていない。 However, in the structure described in Patent Document 1, there is a concern that the weight increases because it is necessary to create a closed cross-sectional structure with two parts. Further, since the closed cross-sectional structure is confined in the closed cross-sectional structure, there is a concern that it may be difficult to join the members at the time of manufacturing. Further, in the structure described in Patent Document 1, the upper corner of the opening at the rear of the vehicle body described in the preceding stage of the background art, that is, the reinforcement of the upper corner of the opening at the outer side in the vehicle width direction than the hinge mounting seat surface. Is not realized.
　本発明は、上記した点に鑑み、車体後部のバックドア取付用の開口部の上部におけるヒンジ取付座部と、ヒンジ取付座部よりも車幅方向外側における開口部の上隅部とを同時に、且つ簡素で軽量な構造で補強することのできる車体後部の開口部構造を提供することを目的とする。 In view of the above-mentioned points, the present invention simultaneously has a hinge mounting seat on the back door mounting opening at the rear of the vehicle body and an upper corner of the opening on the outer side in the vehicle width direction than the hinge mounting seat. It is another object of the present invention to provide an opening structure at the rear of a vehicle body that can be reinforced with a simple and lightweight structure.
　上記目的を達成するために、本発明の請求項１に係る車体後部の開口部構造は、車体後
部のバックドア取付用の開口部の上端まで延長されたルーフパネルの後部にヒンジ取付座部が形成され、該ルーフパネルの後部の車両内側に配置されたルーフバックインナメンバが車幅方向外側のサイドボディに結合され、該ルーフパネルと該ルーフバックインナメンバとで閉断面構造が形成され、該閉断面構造が該開口部の上隅部で該サイドボディに接合された車体後部の開口部構造において、前記ルーフパネルと前記ルーフバックインナメンバとの間において、前記ヒンジ取付座部から前記サイドボディに渡ってリインフォースが配置固定され、該ルーフパネルの後部に形成された縦壁と該ヒンジ取付座部とに該リインフォースが接合され、該リインフォースは、断面クランク状に形成され、上側に山折りの稜線、下側に谷折りの稜線をそれぞれ有し、該上側と下側の稜線の間隔が、車幅方向内側のヒンジ取付座部付近では狭く、車幅方向外側のサイドボディ付近では広くなっていることを特徴とする。 In order to achieve the above object, the opening structure of the rear part of the vehicle body according to claim 1 of the present invention has a hinge mounting seat part at the rear part of the roof panel extended to the upper end of the opening part for mounting the back door at the rear part of the vehicle body. A roof back inner member formed on the inner side of the vehicle at the rear of the roof panel is coupled to a side body on the vehicle width direction outer side, and the roof panel and the roof back inner member form a closed cross-sectional structure, In the opening structure of the rear part of the vehicle body in which the closed cross-sectional structure is joined to the side body at the upper corner of the opening, the side body extends from the hinge mounting seat between the roof panel and the roof back inner member. The reinforcement is disposed and fixed over the vertical direction, and the reinforcement is joined to the vertical wall formed at the rear of the roof panel and the hinge mounting seat, The ose is formed in a crank-shaped cross section, and has a ridge line of mountain folds on the upper side and a ridge line of valley folds on the lower side. The distance between the upper and lower ridge lines is near the hinge mounting seat on the inner side in the vehicle width direction. Is narrow and wide in the vicinity of the side body outside in the vehicle width direction.
　請求項２に係る車体後部の開口部構造は、請求項１記載の車体後部の開口部構造において、前記リインフォースの前記上側の稜線は、前記サイドボディの外板の湾曲形状に連続的に繋がっていることを特徴とする。 The opening structure of the rear part of the vehicle body according to claim 2 is the opening structure of the rear part of the vehicle body according to claim 1, wherein the upper ridge line of the reinforcement is continuously connected to the curved shape of the outer plate of the side body. It is characterized by being.
　請求項３に係る車体後部の開口部構造は、請求項１又は２記載の車体後部の開口部構造において、前記リインフォースの前記下側の稜線が、前記上側の稜線に対し、車幅方向外側に向かうにつれて車両下側に向けて延びていることを特徴とする。 The opening structure of the rear part of the vehicle body according to claim 3 is the opening structure of the rear part of the vehicle body according to claim 1 or 2, wherein the lower ridge line of the reinforcement is outward in the vehicle width direction with respect to the upper ridge line. It is characterized by extending toward the vehicle lower side as it goes.
　請求項４に係る車体後部の開口部構造は、請求項３記載の車体後部の開口部構造において、前記下側の稜線の延長線上に前記開口部の側部内側の稜線が接していることを特徴とする。 The opening structure of the rear part of the vehicle body according to claim 4 is the opening structure of the rear part of the vehicle body according to claim 3, wherein the ridge line inside the side part of the opening part is in contact with the extension line of the lower ridge line. Features.
　請求項５に係る車体後部の開口部構造は、請求項３記載の車体後部の開口部構造において、前記下側の稜線が、前記開口部の側部外側において前記サイドボディの谷型の稜線と交わるように延長されていることを特徴とする。 The opening structure of the rear part of the vehicle body according to claim 5 is the opening structure of the rear part of the vehicle body according to claim 3, wherein the lower ridge line is a valley-shaped ridge line of the side body outside the side part of the opening part. It is extended so that it may cross.
　請求項６に係る車体後部の開口部構造は、請求項１～５の何れかに記載の車体後部の開口部構造において、前記リインフォースの縦壁の車幅方向外側部分が車幅方向内側部分に比べて後下がりに傾斜するように面位相を異にしていることを特徴とする。 The opening structure of the rear part of the vehicle body according to claim 6 is the opening structure of the rear part of the vehicle body according to any one of claims 1 to 5, wherein an outer part in the vehicle width direction of the vertical wall of the reinforcement is an inner part in the vehicle width direction. In comparison, the surface phase is different so as to incline downward.
　請求項１記載の発明によれば、ルーフパネルのヒンジ取付座部と車体後部の開口部の上隅部とにリインフォースを横断させたことで、応力集中の起き易い開口部の上隅部の剛性を高めることができる。また、ルーフパネルとリインフォースとをヒンジ取付座部と縦壁との二面で接合して、ルーフパネルのヒンジ取付座部をリインフォースが車室側から支えることで、ヒンジ取付座部の剛性を十分に確保することができる。 According to the first aspect of the present invention, the reinforcement is crossed between the hinge mounting seat portion of the roof panel and the upper corner portion of the opening portion of the rear portion of the vehicle body, so that the rigidity of the upper corner portion of the opening portion where stress concentration easily occurs. Can be increased. In addition, the roof panel and the reinforcement are joined on the two sides of the hinge mounting seat and the vertical wall, and the hinge mounting seat of the roof panel is supported from the passenger compartment side by the reinforcement so that the hinge mounting seat has sufficient rigidity. Can be secured.
　さらに、ヒンジ取付座部付近のリインフォースの縦壁を上下の稜線間隔の狭い断面としたことで、バックドアヒンジの取付剛性を高めることができ、車両前後方向の荷重に対しても車体後部の開口部の変形を抑止することができる。また、サイドボディに近づくにつれてリインフォースの縦壁の上下の稜線の間隔を広げたことで、開口部の捩れによる横方向からの荷重に対し、応力集中を分散させて、補強効果を高めることができる。 In addition, the vertical wall of the reinforcement in the vicinity of the hinge mounting seat has a cross section with a narrow interval between the upper and lower ridge lines, so that the mounting rigidity of the back door hinge can be increased, and the rear opening of the vehicle body against loads in the longitudinal direction of the vehicle Can be prevented from deforming. In addition, by increasing the distance between the upper and lower ridgelines of the vertical wall of the reinforcement as it approaches the side body, the stress concentration can be dispersed with respect to the load from the lateral direction due to the twist of the opening, and the reinforcing effect can be enhanced. .
　これらによって、車体後部の開口部の上部におけるヒンジ取付部と、ヒンジ取付部よりも車幅方向外側における開口部の上隅部とを同時に、且つ簡素で軽量な構造で補強することができる。 Thus, it is possible to reinforce the hinge mounting portion at the upper part of the opening at the rear of the vehicle body and the upper corner of the opening at the vehicle width direction outside of the hinge mounting portion at the same time with a simple and lightweight structure.
　請求項２記載の発明によれば、リインフォースの上側の稜線をサイドボディの外板の湾曲形状に連続的に繋げたことで、開口部に作用する捩れ方向の荷重をサイドボディに効果的に分散させて、補強効果を一層高めることができる。 According to the second aspect of the present invention, by continuously connecting the upper ridge line of the reinforcement to the curved shape of the outer plate of the side body, the torsional load acting on the opening is effectively distributed to the side body. Thus, the reinforcing effect can be further enhanced.
　請求項３～５の何れかに記載の発明によれば、リインフォースの下側の稜線が車体後部の開口部の縦辺部に連続することで、開口部に作用する捩れ方向の荷重を縦辺部にも効果的に分散させることができ、開口部の上隅部の剛性を一層高めることができる。 According to the invention of any one of claims 3 to 5, the lower ridge line of the reinforcement is continuous with the vertical side of the opening at the rear of the vehicle body, so that the load in the torsional direction acting on the opening is It is possible to effectively disperse the portion, and the rigidity of the upper corner of the opening can be further increased.
　請求項６記載の発明によれば、リインフォースの車幅方向内側と車幅方向外側とで縦壁の面位相を変えたことで、車幅方向の横荷重に対するリインフォースの剛性を高めることができ、これにより、開口部の上部及び上隅部の応力集中を一層緩和させることができる。 According to the invention of claim 6, by changing the surface phase of the vertical wall between the vehicle width direction inside and the vehicle width direction outside of the reinforcement, the rigidity of the reinforcement against the lateral load in the vehicle width direction can be increased, Thereby, the stress concentration of the upper part and the upper corner of the opening can be further relaxed.
本発明の車体後部の開口部構造の適用箇所を示す斜視図（枠内は拡大図）である。It is a perspective view (the inside of a frame is an enlarged view) which shows the application part of the opening part structure of the vehicle body rear part of the present invention. 本発明の車体後部の開口部構造の一実施形態を車両後方から見て示す斜視図である。1 is a perspective view showing an embodiment of an opening structure of a rear part of a vehicle body of the present invention as viewed from the rear of a vehicle. 同じく車体後部の開口部構造を詳細に示す斜視図である。It is a perspective view which similarly shows in detail the opening part structure of a vehicle body rear part. 図３のＡ－Ａ断面図である。FIG. 4 is a cross-sectional view taken along line AA in FIG. 3. 図３のＢ－Ｂ断面図である。FIG. 4 is a sectional view taken along line BB in FIG. 3. 車体後部の開口部構造に適用するリインフォースの一実施形態を示す斜視図である。It is a perspective view which shows one Embodiment of the reinforcement applied to the opening part structure of a vehicle body rear part. 車体後部の開口部構造を図３におけるよりも少し車両左寄りから見て示す斜視図である。FIG. 4 is a perspective view showing the opening structure of the rear part of the vehicle body as seen from the left side of the vehicle a little more than in FIG. 3. リインフォースの縦壁の左右各部の傾斜状態の違いを示す斜視図である。It is a perspective view which shows the difference in the inclination state of each part of right and left of the vertical wall of a reinforcement. リインフォースの第一の変形例を示す斜視図である。It is a perspective view which shows the 1st modification of reinforcement. リインフォースの第二の変形例を示す斜視図である。It is a perspective view which shows the 2nd modification of reinforcement. リインフォースの第三の変形例を示す斜視図である。It is a perspective view which shows the 3rd modification of reinforcement. リインフォースの第四の変形例を示す斜視図である。It is a perspective view which shows the 4th modification of a reinforcement.
　図１～図７は、本発明の車体後部の開口部構造の一実施形態を示すものである。 1 to 7 show an embodiment of an opening structure at the rear of a vehicle body according to the present invention.
　図１は、自動車の車体１の後部の開口部２を示す外観図（枠内は要部拡大図）であり、開口部２の上部及び上隅部３は金属製のルーフパネル４の後部４ａとサイドボディ７で覆われている。図２は、開口部２の上部及び上隅部３におけるルーフパネル４の後部４ａを破断して内部の補強構造を示す図、図３は同じく補強構造を詳細に示す図である。 FIG. 1 is an external view showing an opening 2 in a rear part of a vehicle body 1 of an automobile (the inside of the frame is an enlarged view of a main part), and an upper part and an upper corner 3 of the opening 2 are a rear part 4a of a metal roof panel 4. And the side body 7. FIG. 2 is a view showing the internal reinforcing structure by breaking the rear portion 4a of the roof panel 4 at the upper portion and the upper corner portion 3 of the opening 2, and FIG. 3 is a view showing the reinforcing structure in detail.
　図１において、符号５はサイドボディ７の外板、符号６はサイドボディ７の後板をそれぞれ示している。ルーフパネル４は全幅に渡って略平坦であり（正確には幅方向中央側が上向きに少し凸となるように湾曲している）、ルーフパネル４の車幅方向左右両側に続くサイドボディ部分５は下向きに大きく湾曲している（湾曲部を符号５ａで示す）。 1, reference numeral 5 denotes an outer plate of the side body 7, and reference numeral 6 denotes a rear plate of the side body 7. The roof panel 4 is substantially flat over the entire width (exactly, it is curved so that the central side in the width direction is slightly convex upward), and the side body portions 5 that continue to the left and right sides in the vehicle width direction of the roof panel 4 are It is greatly curved downward (the curved portion is indicated by reference numeral 5a).
　図１のルーフパネル４の後部４ａの車幅方向左右両側に一対のヒンジ取付座部８が形成されている（図１では車両左側のヒンジ取付座部８のみを示している）。ヒンジ取付座部８は、幅広の上壁８ａと幅狭の後壁８ｂ及び車幅方向内側の側壁８ｃと上壁８ａのボルト挿通孔８ｄとを有し、上壁８ａの上面がヒンジ取付座面（符号８ａで代用）であり、上壁８ａはルーフパネル後部４ａの縦壁９に交差して続いている。 A pair of hinge mounting seats 8 are formed on the left and right sides of the rear portion 4a of the roof panel 4 in FIG. 1 (only the hinge mounting seat 8 on the left side of the vehicle is shown in FIG. 1). The hinge mounting seat portion 8 has a wide upper wall 8a, a narrow rear wall 8b, a side wall 8c on the inner side in the vehicle width direction, and a bolt insertion hole 8d in the upper wall 8a. The upper surface of the upper wall 8a is a hinge mounting seat. The upper wall 8a continues across the vertical wall 9 of the roof panel rear portion 4a.
　図４に図３のＡ－Ａ断面、図５に図３のＢ－Ｂ断面を示す如く、ルーフパネル４の後部４ａは、左右の各ヒンジ取付座部８（図４）において段差状に形成され、ヒンジ取付座部８よりも車幅方向外側において傾斜状に形成されている（図５）。図４の段差状部は前側の略垂直な縦壁部９ａと後側且つ下側の横壁１０（図１）とで構成されている。図５の傾斜状の縦壁を符号９ｂで示している。ヒンジ取付座面８ａの裏側には平坦な内面が形成されている。 As shown in FIG. 4 in section AA in FIG. 3 and in FIG. 5 in section BB in FIG. 3, the rear portion 4a of the roof panel 4 is formed in a stepped shape in the left and right hinge mounting seats 8 (FIG. 4). Thus, it is formed in an inclined shape on the outer side in the vehicle width direction than the hinge mounting seat portion 8 (FIG. 5). 4 is composed of a substantially vertical vertical wall 9a on the front side and a lateral wall 10 (FIG. 1) on the rear and lower side. The inclined vertical wall in FIG. 5 is indicated by reference numeral 9b. A flat inner surface is formed on the back side of the hinge mounting seat surface 8a.
　図２の如く、ルーフパネル４の後部４ａの下側に補強部材としてのルーフバックインナメンバ１２が配設され、ルーフバックインナメンバ１２の上側すなわちルーフバックインナメンバ１２とルーフパネル４との間に、本発明の主要部であるリインフォース１３が配設されている。 As shown in FIG. 2, a roof back inner member 12 as a reinforcing member is disposed below the rear portion 4 a of the roof panel 4, and above the roof back inner member 12, that is, between the roof back inner member 12 and the roof panel 4. The reinforcement 13 which is the main part of the present invention is disposed.
　ルーフバックインナメンバ１２はルーフパネル４のヒンジ取付座部８（図２で便宜上鎖線で示している）よりも車体後方に少し延長され（後方延長部を符号１２ａで示す）、ヒンジ取付座部８よりも車体前方に大きく延長され（前方延長部を符号１２ｂで示す）、且つヒンジ取付座部８の車幅方向左右両側にも延長されて開口部２の上部を車幅方向に横断している。ルーフバックインナメンバ１２の前後の端部（１２ａ，１２ｂで代用）はルーフパネル４に接合され、ルーフバックインナメンバ１２の車幅方向外側の端部１２ｃはルーフパネル４の車幅方向外側の端部４ｂと共にサイドボディ７に接合されている。図４，図５の如く、ルーフバックインナメンバ１２はルーフパネル４と共に閉断面構造（閉断面形状部）２１を形成している。 The roof back inner member 12 is slightly extended rearward of the vehicle body from the hinge mounting seat portion 8 (shown by a chain line for convenience in FIG. 2) of the roof panel 4 (the rear extension portion is indicated by reference numeral 12a). More than the front of the vehicle body (the front extension is indicated by reference numeral 12b), and also extends to the left and right sides of the hinge mounting seat 8 in the vehicle width direction and crosses the upper part of the opening 2 in the vehicle width direction. . The front and rear ends (12a, 12b) of the roof back inner member 12 are joined to the roof panel 4, and the roof width inner end 12c of the roof back inner member 12 is the outer end of the roof panel 4 in the vehicle width direction. It is joined to the side body 7 together with the portion 4b. As shown in FIGS. 4 and 5, the roof back inner member 12 forms a closed section structure (closed section shape portion) 21 together with the roof panel 4.
　図１，図２の如く、ルーフパネル４の後部４ａは、ヒンジ取付座部８の前側に略鉛直な面の縦壁９ａを有すると共に、縦壁９ａの前側且つ上側に幅狭な略水平な面の横壁１４を有している。そして、ルーフパネル４のヒンジ取付座部８の内面と縦壁９ａの内面とに、車両内側からリインフォース１３の後側且つ下側の略水平な壁部（横壁）１５の上面１５ａと、中間の縦壁１６の車幅方向内側部分１６ａの略鉛直な後面（符号１６ａで代用）とが接合されている。縦壁１６の上端から前側に突出した上側の略水平な壁部（横壁）１７は、接合されずにルーフバックインナメンバ１２とルーフパネル４との間に位置する。図２においてルーフパネル４の縦壁９と上壁１４を鎖線で示している。 As shown in FIGS. 1 and 2, the rear portion 4 a of the roof panel 4 has a vertical wall 9 a having a substantially vertical surface on the front side of the hinge mounting seat portion 8, and is substantially horizontal and narrow on the front side and the upper side of the vertical wall 9 a. It has a lateral wall 14 of the surface. Then, on the inner surface of the hinge mounting seat portion 8 of the roof panel 4 and the inner surface of the vertical wall 9a, the upper surface 15a of the substantially horizontal wall portion (lateral wall) 15 on the rear side and the lower side of the reinforcement 13 from the inside of the vehicle, The substantially vertical rear surface of the vertical wall 16 in the vehicle width direction inner portion 16a (substitute with reference numeral 16a) is joined. An upper substantially horizontal wall portion (horizontal wall) 17 projecting forward from the upper end of the vertical wall 16 is positioned between the roof back inner member 12 and the roof panel 4 without being joined. In FIG. 2, the vertical wall 9 and the upper wall 14 of the roof panel 4 are indicated by chain lines.
　図２，図６（概略の単体図）の如く、リインフォース１３は、ルーフパネル４のヒンジ取付座部８の内面（下面）に接合する略水平な上面１５ａを車幅方向内側端１５ｂ寄りに有するフランジ板状の下側の壁部（横壁）１５と、下側の壁部１５の前端から略垂直に立ち上げられ、ルーフパネル４の縦壁９ａの略鉛直な前面に接合する略鉛直な後面１６ａを車幅方向内側の端部寄りに有する板状の縦壁１６と、縦壁１６の上端から前方に突出し、ルーフパネル４の上側の略水平な面の下方に対向する幅狭な略水平な面１７ａを車幅方向内側の端部寄りに有するフランジ板状の上側の壁部（横壁）１７とで構成されている。 As shown in FIGS. 2 and 6 (schematic single unit diagram), the reinforcement 13 has a substantially horizontal upper surface 15a that is joined to the inner surface (lower surface) of the hinge mounting seat portion 8 of the roof panel 4 near the inner end 15b in the vehicle width direction. A flange plate-like lower wall (horizontal wall) 15 and a substantially vertical rear surface that rises substantially vertically from the front end of the lower wall 15 and is joined to a substantially vertical front surface of the vertical wall 9a of the roof panel 4. A plate-shaped vertical wall 16 having 16a near the inner end in the vehicle width direction, and a narrow, substantially horizontal surface that protrudes forward from the upper end of the vertical wall 16 and faces the lower side of the substantially horizontal surface above the roof panel 4. A flange plate-like upper wall portion (horizontal wall) 17 having a flat surface 17a near the inner end in the vehicle width direction.
　リインフォース１３の縦壁１６と上側の壁部１７とは同程度の長さで車幅方向外側に向けて車体後部の開口部２（図２）の上隅部３まで延長されている。リインフォース１３の下側の壁部１５は中間の縦壁１６よりも車幅方向外側に短く形成されている。下側の壁部１５は、図１のルーフパネル後部４ａのヒンジ取付座部８に対応して、長手方向略中央から（接合面１５ａよりも車幅方向外側において）車幅方向外側に向かうにつれて漸次幅狭に形成されると共に、漸次下向きに湾曲した形状となっている（幅狭部と湾曲部を符号１５ｃで示す）。 The vertical wall 16 and the upper wall portion 17 of the reinforcement 13 have the same length and extend outward in the vehicle width direction to the upper corner 3 of the opening 2 (FIG. 2) at the rear of the vehicle body. The lower wall portion 15 of the reinforcement 13 is shorter than the intermediate vertical wall 16 on the outer side in the vehicle width direction. The lower wall portion 15 corresponds to the hinge mounting seat portion 8 of the rear portion 4a of the roof panel in FIG. 1 from the substantially longitudinal center (outside the joint surface 15a in the vehicle width direction) toward the vehicle width direction outer side. It is formed so as to be gradually narrow and gradually curved downward (the narrow portion and the curved portion are indicated by reference numeral 15c).
　ヒンジ取付座部８に対応した下側の壁部１５の接合面１５ａにはボルト挿通孔１５ｄが設けられている。ボルト挿通孔１５ｄはヒンジ取付座部８（図４）とルーフバックインナメンバ１２との各ボルト挿通孔８ｄ，１２ｄ（図４）に同心に貫通している。ルーフバックインナメンバ４（図２，図４）は、リインフォース１３の下側の壁部１５の下面に接合する上壁１２ｅを有し、上壁１２ｅにボルト挿通孔１２ｄが設けられている。 A bolt insertion hole 15d is provided in the joint surface 15a of the lower wall portion 15 corresponding to the hinge mounting seat portion 8. The bolt insertion hole 15d passes through the bolt insertion holes 8d and 12d (FIG. 4) concentrically between the hinge mounting seat 8 (FIG. 4) and the roof back inner member 12. The roof back inner member 4 (FIGS. 2 and 4) has an upper wall 12e joined to the lower surface of the lower wall portion 15 of the reinforcement 13, and a bolt insertion hole 12d is provided in the upper wall 12e.
　リインフォース１３（図２）の縦壁１６は、長手方向中間部から車幅方向外側に向かうにつれて漸次上下方向（正確には下方向）に幅広になるように形成され、且つ車両後方に向けて漸次傾斜ないし湾曲している。縦壁１６の幅広且つ傾斜ないし湾曲した車幅方向外側部分を符号１６ｂで示す。また、車幅方向外側部分１６ｂの下側延長部を符号１６ｂ’で示す。 The vertical wall 16 of the reinforce 13 (FIG. 2) is formed so as to gradually increase in the vertical direction (precisely downward) from the middle in the longitudinal direction toward the outside in the vehicle width direction, and gradually toward the rear of the vehicle. Inclined or curved. A wide and inclined or curved outer portion of the vertical wall 16 in the vehicle width direction is indicated by reference numeral 16b. Further, the lower extension of the vehicle width direction outer side portion 16b is denoted by reference numeral 16b '.
　下側の壁部１５の車幅方向外側端１５ｅは、縦壁１６の車幅方向外側端１６ｃよりも車幅方向内側において縦壁１６の下端に交差している。上側の壁部１７は、長手方向中間部から車幅方向外側に向かうにつれて漸次前後方向（正確には後方向）に略扇状に幅広に形成されている（幅広部を符号１７ｂで示す）。 The vehicle width direction outer end 15e of the lower wall portion 15 intersects the lower end of the vertical wall 16 on the vehicle width direction inner side than the vehicle width direction outer end 16c of the vertical wall 16. The upper wall portion 17 is formed in a substantially fan-like shape in the forward and backward direction (exactly in the rear direction) gradually from the middle portion in the longitudinal direction toward the outer side in the vehicle width direction (the wide portion is indicated by reference numeral 17b).
　縦壁１６の車幅方向外側端１６ｃは後側のサイドボディ部分６（図２）に接合され、上側の壁部１７の車幅方向外側端１７ｃは、サイドボディ５（図２）の上側湾曲部５ａの車幅方向内側の端部とその後側のサイドボディ部分６とに接合されている。 The vehicle width direction outer end 16c of the vertical wall 16 is joined to the rear side body portion 6 (FIG. 2), and the vehicle width direction outer end 17c of the upper wall portion 17 is the upper curve of the side body 5 (FIG. 2). The end portion of the portion 5a on the inner side in the vehicle width direction and the side body portion 6 on the rear side are joined.
　リインフォース１３（図２，図６）の縦壁１６の下端と下側の壁部１５の後端との交差部のラインすなわち下側の谷折りの稜線１９Ｌは、車幅方向外側に向かうにつれて漸次車両下側且つ後側に向けて湾曲している。また、縦壁１６の上端と上側の壁部１７の前端との交差部のラインすなわち上側の山折りの稜線２０Ｌは、車幅方向外側に向かうにつれて漸次車両後側に向けて傾斜している。 The line at the intersection of the lower end of the vertical wall 16 and the rear end of the lower wall portion 15 of the reinforcement 13 (FIGS. 2 and 6), that is, the lower valley fold ridge line 19L gradually increases toward the outer side in the vehicle width direction. It curves toward the vehicle lower side and the rear side. Further, the line of the intersecting portion between the upper end of the vertical wall 16 and the front end of the upper wall portion 17, that is, the upper mountain fold ridge line 20L is gradually inclined toward the rear side of the vehicle as it goes outward in the vehicle width direction.
　リインフォース１３の上側の稜線２０Ｌは車幅方向外側に向けて車体後部の開口部２（図２）の上隅部３まで延長されている。下側の稜線１９Ｌは開口部２の上隅部３まで延びている必要はないが、リインフォース１３全体の剛性を確保するために、可能な限り車幅方向外側に向けて延びていることが好ましい。 The ridge line 20L on the upper side of the reinforcement 13 is extended to the upper corner 3 of the opening 2 (FIG. 2) at the rear of the vehicle body toward the outside in the vehicle width direction. The lower ridge line 19L does not need to extend to the upper corner 3 of the opening 2 but preferably extends outward in the vehicle width direction as much as possible in order to ensure the rigidity of the entire reinforcement 13. .
　図３のＡ－Ａ断面（ヒンジ取付座部８を通る断面）を図４に示す如く、ヒンジ取付座部８とその前側において、リインフォース１３は、略鉛直な縦壁１６と、略水平な後側且つ下側の壁部１５と、略水平な前側且つ上側の壁部１７とで断面クランク状（略Ｚ字状）に形成されている。 As shown in FIG. 4, the AA cross section (cross section passing through the hinge mounting seat 8) in FIG. 3 includes the reinforcement 13 on the hinge mounting seat 8 and the front side thereof, the vertical wall 16, and the substantially horizontal rear wall 16. A side and lower wall portion 15 and a substantially horizontal front and upper wall portion 17 are formed in a crank shape (substantially Z-shaped) in cross section.
　リインフォース１３の縦壁１６は、ルーフパネル後部４ａの段差部分の縦壁９ａの内面（前面）に沿って配置・接合され、後側且つ下側の壁部１５は、ルーフパネル後部４ａの段差部分のヒンジ取付座部８の略水平な上壁８ａと、下側のルーフバックインナメンバ１２の上向きに突出した膨出部１２ｆの略水平な上壁１２ｅとの間に挟まれて接合され、これら三枚の重なった壁部８ａ，１５，１２ｅの略中央にヒンジ固定用のボルト挿通孔８ｄ，１２ｄ，１５ｄが設けられて、ヒンジ取付部２２が構成されている。 The vertical wall 16 of the reinforcement 13 is arranged and joined along the inner surface (front surface) of the vertical wall 9a of the step portion of the roof panel rear portion 4a, and the rear and lower wall portion 15 is a step portion of the roof panel rear portion 4a. Between the substantially horizontal upper wall 8a of the hinge mounting seat portion 8 and the substantially horizontal upper wall 12e of the bulging portion 12f protruding upward of the lower roof back inner member 12, Hinge fixing bolt insertion holes 8d, 12d, and 15d are provided at substantially the center of the three overlapping wall portions 8a, 15, and 12e, and the hinge mounting portion 22 is configured.
　リインフォース１３の前側且つ上側の壁部１７ａは、ルーフパネル４の段差部の縦壁９ａから前方に短く突出して、ルーフパネル４とルーフバックインナメンバ１２との間でルーフパネル４の上壁１４寄りにおいて上壁１４と平行に位置している。ルーフパネル４の上壁１４はルーフバックインナメンバ１２の中央の底壁１２ｇと略平行に位置している。 The front and upper wall portion 17a of the reinforcement 13 protrudes forward from the vertical wall 9a of the stepped portion of the roof panel 4 so as to be close to the upper wall 14 of the roof panel 4 between the roof panel 4 and the roof back inner member 12. In FIG. The upper wall 14 of the roof panel 4 is positioned substantially parallel to the central bottom wall 12g of the roof back inner member 12.
　ルーフバックインナメンバ１２は、後側の上向きの膨出部（凸部）１２ｆと、膨出部１２ｆの前側に続く略水平な底壁１２ｇと、底壁１２ｇの前端から立ち上げられた縦壁１２ｈと、縦壁１２ｈの上端から前上がりに傾斜状に屈曲して続く前側の壁部１２ｂとを有している。前側の壁部１２ｂの前端部がルーフパネル４の上壁１４に接合され、後側の上向きの膨出部１２ｆに続く後下がりに傾斜した壁部１２ａがルーフパネル４の後端部１８に接合されている。 The roof back inner member 12 includes a rear upward bulging portion (convex portion) 12f, a substantially horizontal bottom wall 12g following the front side of the bulging portion 12f, and a vertical wall raised from the front end of the bottom wall 12g. 12h, and a front wall portion 12b that is bent and inclined upward from the upper end of the vertical wall 12h. The front end portion of the front wall portion 12b is joined to the upper wall 14 of the roof panel 4, and the rearwardly inclined wall portion 12a following the rear upward bulging portion 12f is joined to the rear end portion 18 of the roof panel 4. Has been.
　ルーフバックインナメンバ１２とルーフパネル４とは閉断面構造２１を形成している。図４において、符号２０Ｌは、リインフォース１３の上側の壁部１７と縦壁１６との交差した上側の稜線を示し、符号１９Ｌは同じく縦壁１６と下側の壁部１５との交差した下側の稜線を示している。 The roof back inner member 12 and the roof panel 4 form a closed section structure 21. In FIG. 4, reference numeral 20 </ b> L indicates an upper ridge line where the upper wall portion 17 of the reinforcement 13 intersects the vertical wall 16, and reference numeral 19 </ b> L similarly indicates a lower side where the vertical wall 16 and the lower wall portion 15 intersect. The ridgeline is shown.
　図３のＢ－Ｂ断面（開口部２の上隅部３寄りの断面）を図５に示す如く、リインフォース１３の縦壁１６ｂは、ルーフパネル後部４ａの縦壁９ｂとルーフバックインナメンバ１２の上向きの山型の突出部１２ｊの後壁１２ｋとの間に挟まれて、後下がりに傾斜した状態で相互に接合されている。 As shown in FIG. 5, the vertical wall 16b of the reinforcement 13 includes the vertical wall 9b of the roof panel rear portion 4a and the roof back inner member 12 as shown in FIG. It is sandwiched between the rear wall 12k of the upward mountain-shaped protrusion 12j and joined to each other while being inclined downwardly.
　リインフォース１３の後側且つ下側の壁部１５ｃは縦壁１６ｂよりもやや水平に近い角度で傾斜し、ルーフパネル４の傾斜状の縦壁９ｂの下部内側に沿って位置し、リインフォース１３の前側且つ上側の壁部１７ｂはルーフパネル４の上壁１４寄りにおいて上壁１４及びルーフバックインナメンバ１２の底壁１２ｇと平行に略水平に位置している。ルーフバックインナメンバ１２の底壁１２ｇは後側の略山型の突出部１２ｊに続き、突出部１２ｊの後側の傾斜壁１２ｋの下端部１２ｋ’はルーフパネル４の後側の傾斜壁９ｂに接合されている。 The rear and lower wall portion 15c of the reinforcement 13 is inclined at an angle slightly closer to the horizontal than the vertical wall 16b and is located along the lower inner side of the inclined vertical wall 9b of the roof panel 4, and the front side of the reinforcement 13 Further, the upper wall portion 17b is positioned substantially horizontally in parallel with the upper wall 14 and the bottom wall 12g of the roof back inner member 12 near the upper wall 14 of the roof panel 4. The bottom wall 12g of the roof back inner member 12 continues to the substantially mountain-shaped protruding portion 12j on the rear side, and the lower end portion 12k ′ of the inclined wall 12k on the rear side of the protruding portion 12j is connected to the inclined wall 9b on the rear side of the roof panel 4. It is joined.
　リインフォース１３の上側の壁部１７ｂは図４の上側の壁部１７ａよりも前後方向に長く、上側の稜線２０Ｌは図４の上側の稜線２０Ｌよりも車両後方に位置し、リインフォース１３の下側の壁部１５ｃは図４の下側の壁部１５よりも下方に延長され且つ後下がりに傾斜し、下側の稜線１９Ｌは図４の下側の稜線１９Ｌよりも下方且つ後方に位置している。 The upper wall portion 17b of the reinforce 13 is longer in the front-rear direction than the upper wall portion 17a in FIG. 4, and the upper ridge line 20L is located behind the upper ridge line 20L in FIG. The wall portion 15c extends downward from the lower wall portion 15 in FIG. 4 and is inclined downwardly, and the lower ridge line 19L is positioned lower and rearward than the lower ridge line 19L in FIG. .
　図４の如く、ルーフパネル４とリインフォース１３とをヒンジ取付座部８の面８ａ，１５ａとその車両前方の略鉛直な面９ａ，１６ａとの各二面で接合することで、ルーフパネル４のヒンジ取付座部８をリインフォース１３が車室側から支える形となり、ヒンジ取付座部８の剛性が十分に確保される。 As shown in FIG. 4, the roof panel 4 and the reinforcement 13 are joined to each other by two surfaces of the surfaces 8 a and 15 a of the hinge mounting seat 8 and the substantially vertical surfaces 9 a and 16 a in front of the vehicle. The reinforcement 13 is supported by the reinforcement 13 from the passenger compartment side, and the rigidity of the hinge mounting seat 8 is sufficiently ensured.
　また、図２，図３に示す如く、ルーフパネル後部４ａのヒンジ取付座部８と車体後部の開口部２の上隅部３とをリインフォース１３が横断する形となり、且つリインフォース１３の上側の一本（同一）の稜線２０Ｌでヒンジ取付座部８と車体後部の開口部２の上隅部３とを繋ぐことで、応力集中の起き易い開口部２の上隅部３の補強が同時に実現される。 2 and 3, the reinforcement 13 crosses the hinge mounting seat 8 of the roof panel rear portion 4a and the upper corner 3 of the opening 2 at the rear of the vehicle body. By connecting the hinge mounting seat 8 and the upper corner 3 of the opening 2 at the rear of the vehicle body with the same (same) ridgeline 20L, reinforcement of the upper corner 3 of the opening 2 where stress concentration easily occurs is realized at the same time. The
　従来構造（例えば前記特許文献１記載の構造）と本発明の構造との応力集中の様子を実験で比較した結果、車体後部の開口部２が変形した際に、本発明の構造により、車体後部の開口部２の上隅部３とヒンジ取付座部８との応力集中が緩和されていること、及びリインフォース１３の上下の各稜線１９Ｌ，２０Ｌに応力が発生して、リインフォース１３でルーフパネル４が補強されていることが実証された。 As a result of comparing the stress concentration between the conventional structure (for example, the structure described in Patent Document 1) and the structure of the present invention by experiment, when the opening 2 at the rear of the vehicle body is deformed, The stress concentration between the upper corner portion 3 of the opening 2 and the hinge mounting seat portion 8 is relaxed, and stress is generated on the upper and lower ridge lines 19L and 20L of the reinforcement 13 so that the roof panel 4 Has been demonstrated to be reinforced.
　以下に、本発明の車体後部の開口部構造の特徴及び効果を総括しつつさらに詳細に説明する。 Hereinafter, the features and effects of the opening structure at the rear of the vehicle body of the present invention will be described in further detail.
　図３に示す如く、車体後部の開口部構造の前提部分として、車体後部のバックドア（図示せず）が設置される開口部２の周辺部分において、車両外側のルーフパネル４が車両前後方向に車両後部の開口部２の上端まで延びて、そのルーフパネル延長部（後部）４ａにヒンジ取付座面８ａを含むヒンジ取付座部８（図１）が形成されている。また、車両内側のルーフバックインナメンバ１２が、開口部２の上端において、ルーフバックインナメンバ１２の左右両側部分を左右の各サイドボディ７に結合して配置されている。また、ルーフパネル４とルーフバックインナメンバ１２とで閉断面構造（閉断面形状部）２１（図４）が形成され、この閉断面構造２１が開口部２の左右の上隅部３で左右のサイドボディ７と接合されている。 As shown in FIG. 3, the roof panel 4 on the outside of the vehicle extends in the vehicle front-rear direction at a peripheral portion of the opening 2 where a back door (not shown) at the rear of the vehicle is installed. A hinge mounting seat portion 8 (FIG. 1) including a hinge mounting seat surface 8a is formed on the roof panel extension portion (rear portion) 4a extending to the upper end of the opening 2 at the rear of the vehicle. Further, a roof back inner member 12 on the vehicle inner side is disposed at the upper end of the opening 2 by connecting the left and right side portions of the roof back inner member 12 to the left and right side bodies 7. Further, the roof panel 4 and the roof back inner member 12 form a closed section structure (closed section shape portion) 21 (FIG. 4), and the closed section structure 21 is formed at the left and right upper corners 3 of the opening 2 at the left and right sides. It is joined to the side body 7.
　上記前提部分において、第一の特徴として、ルーフパネル４とルーフバックインナメンバ１２との間にリインフォース１３が配置され、ルーフパネル４の後部４ａに形成された縦壁９ａの内面とヒンジ取付座部８の内面とにリインフォース１３が接合され、ルーフパネル４のヒンジ取付座部８からサイドボディ７に渡ってリインフォース１３が配置・固定されている。 In the above premise portion, as a first feature, the reinforcement 13 is disposed between the roof panel 4 and the roof back inner member 12, and the inner surface of the vertical wall 9a formed on the rear portion 4a of the roof panel 4 and the hinge mounting seat portion. The reinforcement 13 is joined to the inner surface of the roof 8, and the reinforcement 13 is arranged and fixed from the hinge mounting seat 8 of the roof panel 4 to the side body 7.
　さらに、リインフォース１３は上下の横壁１５，１７と中間の縦壁１６とで断面クランク状（Ｚ字状）に形成され、上側に山折りの稜線２０Ｌを有すると共に、下側に谷折りの稜線１９Ｌを有し、これら二つの稜線１９Ｌ，２０Ｌの上下方向の間隔Ｈが、車幅方向内側のヒンジ取付座部（固定部）８付近では狭く（間隔Ｈ１）、車幅方向外側のサイドボディ７付近では広くなっている。すなわちリインフォース１３の縦壁１６の上下方向幅が車両外側に向かうにつれて広く（間隔Ｈ２）なっている。 Furthermore, the reinforcement 13 is formed in a cross-sectional crank shape (Z-shape) by the upper and lower horizontal walls 15 and 17 and the intermediate vertical wall 16, and has a mountain-folded ridgeline 20L on the upper side and a valley-folded ridgeline 19L on the lower side. The distance H between the two ridges 19L and 20L in the vertical direction is narrow (space H1) near the hinge mounting seat (fixed part) 8 on the inner side in the vehicle width direction, and near the side body 7 on the outer side in the vehicle width direction. It is getting wider. That is, the vertical width of the vertical wall 16 of the reinforcement 13 becomes wider (interval H2) as it goes to the vehicle outer side.
　なお、図３，図７において、リインフォースの下側の稜線は見る角度によって二本形成されており（車両後部上方から見た場合は稜線１９Ｌ１、車両後方から見た場合は稜線１９Ｌ２）、便宜上何れの稜線も符号１９Ｌとして総括する。 3 and 7, two lower ridge lines are formed depending on the viewing angle (the ridge line 19L1 when viewed from the rear upper part of the vehicle and the ridge line 19L2 when viewed from the rear of the vehicle). The ridgeline is also summarized as 19L.
　上記第一の特徴によって、リインフォース１３におけるヒンジ取付座部８付近を上下の稜線１９Ｌ，２０Ｌの間隔Ｈ１の狭い断面形状とした（縦壁１６ａの上下方向幅を短くした）ことで、バックドアヒンジの取付剛性を高めることができ、車両前後方向の荷重に対してもリインフォース１３が変形し難くなる。また、サイドボディ７に近づくにつれて、リインフォース１３の上下の稜線１９Ｌ，２０Ｌの間隔Ｈ２を広げたことで、車両後部の開口部２の捩れによる車両横方向からの荷重に対し、リインフォース１３の応力集中を分散させる効果が発揮される。 According to the first feature, the vicinity of the hinge mounting seat 8 in the reinforcement 13 has a narrow cross-sectional shape with a space H1 between the upper and lower ridgelines 19L, 20L (the vertical width of the vertical wall 16a is shortened), thereby The mounting rigidity can be increased, and the reinforcement 13 is less likely to be deformed even with respect to the vehicle longitudinal direction load. Further, as the distance from the side body 7 increases, the distance H2 between the upper and lower ridges 19L and 20L of the reinforcement 13 is increased, whereby the stress concentration of the reinforcement 13 is applied to the load from the lateral direction of the vehicle due to the twist of the opening 2 at the rear of the vehicle. The effect of dispersing is exhibited.
　図３，図７に示す如く、第二の特徴として、リインフォース１３の上側の稜線２０Ｌが、サイドボディ７の外板（サイドボディアウタパネル）５の上部の湾曲形状５ａに連続的に繋がっていること（稜線２０Ｌの延長部分２０Ｌ’参照）が挙げられる。上側の稜線２０Ｌはサイドボディ５の上部の湾曲形状５ａから略接線方向にサイドボディ５の斜め下向きの傾斜状の外面５ｂに沿って略直線的に続いている。 As shown in FIGS. 3 and 7, the second feature is that the upper ridge line 20 </ b> L of the reinforcement 13 is continuously connected to the upper curved shape 5 a of the outer plate (side body outer panel) 5 of the side body 7. (Refer to the extended portion 20L ′ of the ridge line 20L). The upper ridge line 20L continues substantially linearly from the upper curved shape 5a of the side body 5 along the outer surface 5b inclined obliquely downward in the side body 5 in a substantially tangential direction.
　上記第二の特徴によって、車両後部の開口部２の捩れ方向の荷重をサイドボディ７に効果的に分散させることができる。 According to the second feature, the load in the twisting direction of the opening 2 at the rear of the vehicle can be effectively distributed to the side body 7.
　図３，図７の如く、第三の特徴として、リインフォース１３の下側の稜線１９Ｌが上側の稜線２０Ｌに対し、車両外側（車幅方向外側）に向かうほど少なくともリインフォース１３の範囲で車両下側に向けて延びていることが挙げられる。車両外側に向かってリインフォース１３の上側の稜線２０Ｌはほぼ水平に延びているのに対し、下側の稜線１９Ｌは車両外側に向かうほど漸次下向きに遷移している。 As shown in FIGS. 3 and 7, the third feature is that the lower ridge line 19 </ b> L of the reinforcement 13 is at least in the range of the reinforcement 13 toward the vehicle outer side (vehicle width direction outer side) with respect to the upper ridge line 20 </ b> L. It is mentioned that it extends toward The upper ridge line 20L of the reinforcement 13 extends substantially horizontally toward the vehicle outer side, whereas the lower ridge line 19L gradually transitions downward toward the vehicle outer side.
　図３，図７の如く、第四の特徴として、上記第三の特徴において、リインフォース１３の下側の稜線１９Ｌ１の延長線１９Ｌ１’上に、車体後部の開口部２の上側の側部（縦辺部２４の上部）における車両内側（車幅方向内側）の谷型（谷折れ）の稜線２３Ｌが接するように位置していることが挙げられる。 As shown in FIGS. 3 and 7, as a fourth feature, in the third feature described above, on the extension line 19 </ b> L <b> 1 ′ of the lower ridge line 19 </ b> L <b> 1 of the reinforcement 13, It is mentioned that it is located so that the ridgeline 23L of the valley type (valley break) on the vehicle inner side (vehicle width direction inner side) in the upper part of the side part 24 may contact.
　開口部２の周縁２５は後方に向けてフランジ状に短く立ち上げられており、この周縁２５の立上げ基部すなわち、周縁２５とサイドボディ６との交差部のラインが車両内側の稜線２３Ｌをなしている。 The peripheral edge 25 of the opening 2 is shortly raised like a flange toward the rear, and the rising base of the peripheral edge 25, that is, the line of the intersection of the peripheral edge 25 and the side body 6 forms a ridge line 23 </ b> L inside the vehicle. ing.
　図３，図７の如く、第五の特徴として、上記第三の特徴において、リインフォース１３の下側の稜線１９Ｌ２が、車体後部の開口部２の側部（縦辺部２４の上部）におけるサイドボディ６の車両外側（車幅方向外側）の谷型（谷折れ）の稜線２６Ｌと交わるように延長されていること（稜線１９Ｌ２の延長部１９Ｌ２’と稜線２６Ｌとの交差部２６Ｌａ参照）が挙げられる。第五の特徴は、前記第四の特徴とは別に（何れか一方を選択するように）構成されるものである。 As shown in FIGS. 3 and 7, as a fifth feature, in the third feature, the lower ridge line 19 </ b> L <b> 2 of the reinforcement 13 is a side part of the opening 2 at the rear of the vehicle body (upper side of the vertical side part 24). It is extended so that it may intersect with the ridgeline 26L of the valley shape (valley fold) on the vehicle outer side (vehicle width direction outer side) of the body 6 (see the intersection portion 26La between the extension portion 19L2 ′ of the ridgeline 19L2 and the ridgeline 26L). It is done. The fifth feature is configured separately from the fourth feature (either one is selected).
　開口部２の上部両側のサイドボディ部分６は、車幅方向の厚みを持つ車両外側の壁部６ａと車両前後方向の厚みを持つ車両内側の壁部６ｂとで構成され、両壁部６ａ，６ｂの交差部のラインが谷型の稜線２６Ｌをなしている。谷型の稜線２６Ｌは前記第四の特徴の車両内側の稜線２３Ｌと略平行に下向きに延びている。車両外側の壁部６ａには例えばバックドアスティの上端部がねじ止めされる（ボルト挿通孔を符号６ｃで示す）。 The side body portions 6 on both sides of the upper portion of the opening 2 are composed of a vehicle outer wall portion 6a having a thickness in the vehicle width direction and a vehicle inner wall portion 6b having a thickness in the vehicle front-rear direction. The line at the intersection of 6b forms a valley-shaped ridge line 26L. The valley-shaped ridge line 26L extends downward substantially parallel to the vehicle-side ridge line 23L of the fourth feature. For example, the upper end portion of the back door stay is screwed to the wall portion 6a outside the vehicle (a bolt insertion hole is indicated by reference numeral 6c).
　上記第三～第五の特徴によって、リインフォース１３の下側の稜線１９Ｌが、開口部２のサイドボディ部分６を含む縦辺部２４と連続して、荷重が縦辺部２４へも効果的に伝えられて（分散されて）、開口部２の上隅部３の剛性が一層高められる。 By the third to fifth features, the lower ridge line 19L of the reinforcement 13 is continuous with the vertical side 24 including the side body portion 6 of the opening 2, and the load is effectively applied to the vertical side 24. As a result, the rigidity of the upper corner 3 of the opening 2 is further increased.
　図４，図５，図８に示す如く、第六の特徴として、リインフォース１３の縦壁１６の車幅方向内側部分１６ａと車幅方向外側部分１６ｂとで面位相が異なっている（縦壁１６の面が捩れている）ことが挙げられる。 As shown in FIGS. 4, 5, and 8, as a sixth feature, the surface phase is different between the vehicle width direction inner portion 16 a and the vehicle width direction outer portion 16 b of the vertical wall 16 of the reinforcement 13 (the vertical wall 16 Is twisted).
　図４の如く縦壁１６の車幅方向内側部分１６ａはほぼ鉛直に形成され、図５の如く縦壁１６の車幅方向外側部分１６ｂは後下がりに傾斜している。縦壁１６は、車幅方向内側部分１６ａを基準として車幅方向外側部分１６ｂを後下がりに傾斜するように前後方向に捩った形状となっている。図８において、車幅方向内側部分１６ａの傾斜を線２７Ｌで示し、車幅方向外側部分１６ｂの傾斜を線２８Ｌで示している。符号１５はリインフォース１の下壁、符号１７は上壁、符号１６ｂ’は車幅方向外側部分１６ｂの下側延長部をそれぞれ示している。 As shown in FIG. 4, the vehicle width direction inner portion 16a of the vertical wall 16 is formed substantially vertically, and the vehicle width direction outer portion 16b of the vertical wall 16 is inclined downwardly as shown in FIG. The vertical wall 16 has a shape twisted in the front-rear direction so as to incline the vehicle width direction outer side portion 16b rearward and downward with respect to the vehicle width direction inner side portion 16a. In FIG. 8, the inclination of the inner portion 16a in the vehicle width direction is indicated by a line 27L, and the inclination of the outer portion 16b in the vehicle width direction is indicated by a line 28L. Reference numeral 15 denotes a lower wall of the reinforcement 1, reference numeral 17 denotes an upper wall, and reference numeral 16b 'denotes a lower extension of the vehicle width direction outer portion 16b.
　上記第六の特徴によって、リインフォース１３の縦壁１６の車幅方向内側１６ａと車幅方向外側１６ｂとで面位相を変えたことで、リインフォース１３の車両左右（幅）方向の横荷重に対する剛性が高められて、開口部２の上隅部３の応力集中が一層緩和される。 According to the sixth feature, the rigidity of the reinforcement 13 against lateral load in the vehicle left-right (width) direction is changed by changing the surface phase between the vehicle width direction inner side 16a and the vehicle width direction outer side 16b of the vertical wall 16 of the reinforcement 13. The stress concentration in the upper corner 3 of the opening 2 is further relaxed.
　図９～図１２は、図６に示したリインフォース１３の形状を変えた各種形態例を示すものである。 9 to 12 show various examples in which the shape of the reinforcement 13 shown in FIG. 6 is changed.
　図９，図１０の各リインフォース３１，３２は構造を簡素化したものである。図９のリインフォース３１は略垂直な縦壁３５と、縦壁３５の下側且つ後側に続く略水平な小さな横壁３６と、縦壁３５の上側且つ前側に続く横壁３７とを有したものである。また、図１０のリインフォース３２は縦壁３８と上下の略水平な各横壁３９，４０とを車幅方向に同じ長さで且つ図６の例よりも短く形成したものである。下側の各横壁３６，３９はヒンジ取付用のボルト挿通孔４１を有する。 Each reinforce 31, 32 in FIG. 9 and FIG. 10 is a simplified structure. The reinforce 31 shown in FIG. 9 has a substantially vertical vertical wall 35, a substantially horizontal small horizontal wall 36 that extends below and behind the vertical wall 35, and a horizontal wall 37 that extends above and in front of the vertical wall 35. is there. Further, the reinforcement 32 in FIG. 10 has a vertical wall 38 and upper and lower horizontal walls 39 and 40 that have the same length in the vehicle width direction and shorter than the example in FIG. Each lower side wall 36, 39 has a bolt insertion hole 41 for hinge attachment.
　各リインフォース３１，３２の上下の稜線４２Ｌ，４３Ｌは真直であり、図６のような上下の稜線１９Ｌ，２０Ｌの上下前後方向の変化はなく、稜線の変化による図６の例の効果は期待できないが、各リインフォース３１，３２を断面クランク状（Ｚ字状）として、ルーフパネル４（図１）とリインフォース３１，３２とをヒンジ取付座部８（図１）の内面とその車体前方の略鉛直な縦壁９（図１）の内面との二面で接合して、ルーフパネル４のヒンジ取付座部８をリインフォース３１，３２が車室側から支えることで、ヒンジ取付座部８の剛性を確保することができる。 The upper and lower ridge lines 42L and 43L of the respective reinforcements 31 and 32 are straight, and there is no change in the upper and lower ridge lines 19L and 20L as shown in FIG. 6, and the effect of the example of FIG. However, each of the reinforces 31 and 32 has a cross-sectional crank shape (Z shape), and the roof panel 4 (FIG. 1) and the reinforces 31 and 32 are substantially vertical in front of the vehicle body and the inner surface of the hinge mounting seat 8 (FIG. 1). The hinge mounting seat portion 8 is joined to the inner surface of the vertical wall 9 (FIG. 1), and the hinge mounting seat portion 8 of the roof panel 4 is supported by the reinforcements 31 and 32 from the passenger compartment side. Can be secured.
　また、図９の横方向に長いリインフォース３１により、また図１０の短いリインフォース３２を横方向に延長することで、ルーフパネル４（図１）のヒンジ取付座部８と車体後部の開口部２の上隅部３とをリインフォース３１（３２）が横断し、且つ上側の同一の稜線４３Ｌで繋ぐことで、応力集中の起き易い開口上隅部３の補強を行うことができる。しかも簡素なリインフォース構造で車体重量を軽減することができる。 Further, by extending the lateral reinforcement 31 in FIG. 9 and the lateral reinforcement 32 in FIG. 10 in the lateral direction, the hinge mounting seat 8 of the roof panel 4 (FIG. 1) and the opening 2 at the rear of the vehicle body are formed. The reinforcement 31 (32) crosses the upper corner 3 with the same upper ridge line 43L, whereby the upper opening corner 3 where stress concentration easily occurs can be reinforced. In addition, the weight of the vehicle body can be reduced with a simple reinforcement structure.
　図１１，図１２の各リインフォース３３，３４は、図６のリインフォース１３の構成を残しつつ構造を少し複雑化且つ大型化したものである。図１１のリインフォース３３は、縦壁４４の下端と、車幅（左右）方向に短い下側の横壁４５の後端とに、車体後方に向けて後下がりに傾斜した延長壁４６を一体に形成したものである。縦壁４４と下側の横壁４５及び後側の延長壁４６との交差部のラインが下側の稜線４７Ｌを成し、縦壁４４と上側の横壁４８との交差部のラインが上側の稜線５２Ｌを成す。 11 and FIG. 12, the reinforcements 33 and 34 have a slightly complicated and enlarged structure while retaining the configuration of the reinforcement 13 of FIG. Reinforce 33 shown in FIG. 11 is integrally formed with an extension wall 46 inclined downwardly toward the rear of the vehicle body at the lower end of vertical wall 44 and the rear end of lower horizontal wall 45 that is short in the vehicle width (left-right) direction. It is a thing. The line of the intersection of the vertical wall 44 and the lower horizontal wall 45 and the rear extension wall 46 forms a lower ridge line 47L, and the line of the intersection of the vertical wall 44 and the upper horizontal wall 48 is the upper ridge line. 52L is formed.
　また、図１２のリインフォース３４は、縦壁４９と上下の各横壁５０，５１とを車幅方向内側に向けて延長したものである（延長壁部を符号４９ａ，５０ａ，５１ａで示す）。下側の延長壁部５０ａはルーフパネル４（図１）のヒンジ取付座部８の内面形状に沿って段差状に形成されている。縦壁４９と下側の横壁５０との交差部のラインが下側の稜線５３Ｌを成し、縦壁４９と上側の横壁５１との交差部のラインが上側の稜線５４Ｌを成す。図１１，図１２の下側の各横壁４５，５０はヒンジ取付用のボルト挿通孔４１を有する。 Further, the reinforcement 34 in FIG. 12 is obtained by extending the vertical wall 49 and the upper and lower horizontal walls 50 and 51 inward in the vehicle width direction (extended wall portions are denoted by reference numerals 49a, 50a, and 51a). The lower extension wall portion 50a is formed in a step shape along the inner surface shape of the hinge mounting seat portion 8 of the roof panel 4 (FIG. 1). The line of the intersection of the vertical wall 49 and the lower horizontal wall 50 forms the lower ridge line 53L, and the line of the intersection of the vertical wall 49 and the upper horizontal wall 51 forms the upper ridge line 54L. Each of the lower side walls 45 and 50 on the lower side of FIGS. 11 and 12 has a bolt insertion hole 41 for hinge attachment.
　図１１，図１２の各リインフォース３３，３４は、図６のリインフォース１３におけると同様な上下の稜線４７Ｌ，５２Ｌ、５３Ｌ，５４Ｌによる前記効果を奏する。それに加えて、図１１のリインフォース３３においては、例えば図２，図４に示すルーフバックインナメンバ１２の車両後側の部分１２ａに沿ってリインフォース３３の後側延長壁４６を重ねて配置して、開口部２の上縁部の剛性を高めることができる。 11 and 12 has the above-described effects due to the upper and lower ridgelines 47L, 52L, 53L, and 54L similar to those in the reinforcement 13 of FIG. In addition, in the reinforcement 33 of FIG. 11, for example, the rear extension wall 46 of the reinforcement 33 is arranged so as to overlap along the vehicle rear portion 12 a of the roof back inner member 12 shown in FIGS. 2 and 4. The rigidity of the upper edge part of the opening part 2 can be improved.
　また、図１２のリインフォース３４においては、ルーフパネル４（図１）の縦壁９の内面に沿って車幅方向内側にリインフォース３４の縦壁延長部４９ａを重ねると共に、ルーフバックインナメンバ１２（図２）の車幅方向内側に向かう部分にリインフォース３４の下側の横壁延長部５０ａを重ねて、開口部２の上部の剛性を高めることができる。 Further, in the reinforcement 34 in FIG. 12, the vertical wall extension 49a of the reinforcement 34 is overlapped on the inner side in the vehicle width direction along the inner surface of the vertical wall 9 of the roof panel 4 (FIG. 1), and the roof back inner member 12 (see FIG. 12). The rigidity of the upper part of the opening 2 can be increased by superimposing the lower side wall extension 50a on the lower side of the reinforcement 34 on the portion inward in the vehicle width direction of 2).
　本発明の車体後部の開口部構造は、車体後部のバックドア取付用の開口部の上部におけるヒンジ取付座部と、ヒンジ取付座部よりも車幅方向外側における開口部の上隅部とを同時に、且つ簡素で軽量な構造で補強するために利用することができる。 The opening structure of the rear part of the vehicle body according to the present invention is such that the hinge mounting seat part at the upper part of the opening part for mounting the back door at the rear part of the vehicle body and the upper corner part of the opening part on the outer side in the vehicle width direction from the hinge mounting seat part simultaneously. And it can be used to reinforce with a simple and lightweight structure.
　１　　　　　車体
　２　　　　　開口部
　３　　　　　上隅部
　４　　　　　ルーフパネル
　４ａ　　　　後部
　５　　　　　外板
　５ａ　　　　湾曲形状
　７　　　　　サイドボディ
　８　　　　　ヒンジ取付座部
　９　　　　　縦壁
　１２　　　　ルーフバックインナメンバ
　１３　　　　リインフォース
　１６　　　　縦壁
　１６ａ　　　車幅方向内側部分
　１６ｂ　　　車幅方向外側部分
　１９Ｌ　　　下側の稜線
　１９Ｌ１’　延長線
　２０Ｌ　　　上側の稜線
　２１　　　　閉断面構造
　２３Ｌ　　　開口部の稜線
　２６Ｌ　　　サイドボディの稜線
　Ｈ　　　　　間隔 DESCRIPTION OF SYMBOLS 1 Car body 2 Opening part 3 Upper corner part 4 Roof panel 4a Rear part 5 Outer plate 5a Curved shape 7 Side body 8 Hinge mounting seat part 9 Vertical wall 12 Roof back inner member 13 Reinforce 16 Vertical wall 16a Car width direction inner part 16b Car width Directional outer portion 19L Lower ridge line 19L1 'Extension line 20L Upper ridge line 21 Closed cross-section structure 23L Opening ridge line 26L Side body ridge line H Interval

Claims (6)

  1. 　車体後部のバックドア取付用の開口部の上端まで延長されたルーフパネルの後部にヒンジ取付座部が形成され、該ルーフパネルの後部の車両内側に配置されたルーフバックインナメンバが車幅方向外側のサイドボディに結合され、該ルーフパネルと該ルーフバックインナメンバとで閉断面構造が形成され、該閉断面構造が該開口部の上隅部で該サイドボディに接合された車体後部の開口部構造において、
    　前記ルーフパネルと前記ルーフバックインナメンバとの間において、前記ヒンジ取付座部から前記サイドボディに渡ってリインフォースが配置固定され、該ルーフパネルの後部に形成された縦壁と該ヒンジ取付座部とに該リインフォースが接合され、
    　該リインフォースは、断面クランク状に形成され、上側に山折りの稜線、下側に谷折りの稜線をそれぞれ有し、該上側と下側の稜線の間隔が、車幅方向内側のヒンジ取付座部付近では狭く、車幅方向外側のサイドボディ付近では広くなっていることを特徴とする車体後部の開口部構造。     A hinge mounting seat is formed at the rear part of the roof panel extended to the upper end of the opening for mounting the back door at the rear of the vehicle body, and the roof back inner member disposed inside the vehicle at the rear part of the roof panel is outside in the vehicle width direction. The roof panel and the roof back inner member form a closed cross-section structure, and the closed cross-section structure is joined to the side body at the upper corner of the opening. In structure
    Between the roof panel and the roof back inner member, a reinforcement is disposed and fixed from the hinge mounting seat to the side body, and a vertical wall formed at the rear of the roof panel and the hinge mounting seat The reinforcement is joined to
    The reinforcement is formed in a crank-shaped cross section, has a ridge line of a mountain fold on the upper side, and a ridge line of a valley fold on the lower side, and the distance between the upper and lower ridge lines is the hinge mounting seat on the inner side in the vehicle width direction. An opening structure at the rear of the vehicle body that is narrow in the vicinity and wide in the vicinity of the side body on the outer side in the vehicle width direction.
  2. 　前記リインフォースの前記上側の稜線は、前記サイドボディの外板の湾曲形状に連続的に繋がっていることを特徴とする請求項１記載の車体後部の開口部構造。 The opening structure of the rear portion of the vehicle body according to claim 1, wherein the upper ridge line of the reinforcement is continuously connected to the curved shape of the outer plate of the side body.
  3. 　前記リインフォースの前記下側の稜線が、前記上側の稜線に対し、車幅方向外側に向かうにつれて車両下側に向けて延びていることを特徴とする請求項１又は２記載の車体後部の開口部構造。 The opening part of the rear part of the vehicle body according to claim 1, wherein the lower ridge line of the reinforcement extends toward the vehicle lower side toward the outer side in the vehicle width direction with respect to the upper ridge line. Construction.
  4. 　前記下側の稜線の延長線上に前記開口部の側部内側の稜線が接していることを特徴とする請求項３記載の車体後部の開口部構造。 The opening structure of the rear part of the vehicle body according to claim 3, wherein a ridge line on the inner side of the opening is in contact with an extension line of the lower ridge line.
  5. 　前記下側の稜線が、前記開口部の側部外側において前記サイドボディの谷型の稜線と交わるように延長されていることを特徴とする請求項３記載の車体後部の開口部構造。 4. The opening structure of the rear part of the vehicle body according to claim 3, wherein the lower ridge line is extended so as to intersect with a valley-shaped ridge line of the side body outside the side part of the opening.
  6. 　前記リインフォースの縦壁の車幅方向外側部分が車幅方向内側部分に比べて後下がりに傾斜するように面位相を異にしていることを特徴とする請求項１～５の何れかに記載の車体後部の開口部構造。 6. The surface phase is different so that an outer portion in the vehicle width direction of the vertical wall of the reinforcement is inclined rearward and lower than an inner portion in the vehicle width direction. Opening structure at the rear of the vehicle body.
PCT/JP2015/053612 2014-02-12 2015-02-10 Opening section structure for rear section of vehicle body WO2015122400A1 (en)

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